jaw crusher single toggle and double toggle

single toggle vs double toggle jaw crusher - jxsc machine

single toggle vs double toggle jaw crusher - jxsc machine

Crusher machines play an important role in the mines, metallurgy, building materials, quarrying, recycling, chemical and so on industries. According to the difference of structure and working principle, the rock crushers are mainly divided into jaw crusher, cone crusher, roller crusher, impact crusher, etc. The jaw crusher usually the primary crusher for in the crushing plant, to reduce the large ore lump to smaller particles for the next stages of fine crushing, grinding. The model selection of crusher is determined by the opening gap, moisture, capacity, and other factors. How to choose a jaw crusher? Get professional help from JXSC engineers. Types of jaw crusher

The main parts of the swing jaw crusher are stationary jaw die, movable jaw die, impellor, eccentric shaft, toggle plate. Single toggle jaw crusher with simple structure, high crushing ratio, is suited for crushing large hard rock. Besides, swing movement wont cause much abrasion on the movable die, thereby easy to maintain. But it is affected by tiny spaces and transport conditions especially in the remote area because of its large volume and heavyweight. There is a trend that a double toggle jaw rock crusher is gradually replacing the single toggle one.

The double toggle jaw crusher has two forms of working direction: one is a swing motion toward the fixed die plate, and the other is a vertical motion because of the rotation of the eccentric shaft. Through adjusting the movable die suspension and support mode, the processing capability, power consumption, liner wear, and moving stroke can be optimized. Double toggle crusher is smaller than a single toggle crusher, is widely used at home and abroad for its lesser price, simple structure and reliable operation.

This type is design firstly by experts of Germany, it also has two types as single toggle double cavity jaw crusher and double toggle double cavity jaw crusher. The eccentric shaft deployed in the lower part of the crusher and the movable part divides into two working surface, which is respectively composed of two independent crushing cavities with the fixed jaw die. With the rotation of the eccentric shaft, the left and right crushing cavity alternatively to do crushing work, that is, crushing and discharging processes are dont affected by the swing jaw. You may be interested in jaw crusher VS gyratory crusher, and the operation tips for jaw crusher.

jaw stone crusher | single toggle vs double toggle - jxsc mine

jaw stone crusher | single toggle vs double toggle - jxsc mine

Jaw stone crusher is heavy duty machines and hence need to be robustly constructed. The movable jaw and static jaw are made up of the crushing chamber. It stimulates the movement of the two jaws of the Animal and completes working. Widely used in mining smelting, building materials, roads, railways, water conservancy, and chemical industries in a variety of ore and large pieces of material crushing. The classification of Jaw crusher: single toggle jaw crusher, double toggle jaw crusher, hydraulic jaw crusher, impact jaw rock crusher, mobile jaw stonecrusher, etc. Which jaw crusher better single toggle or double toggle.

The movable jaw is suspended from the mandrel and swings from side to side. When the eccentric axis rotates, the connecting rod moves up and down. And drives the two thrust plates to move back and forth as well. Thus pushing the jaw to move left and right to move back and forth, realizing crushing and discharging.

This kind of crusher adopts a crank two-bar linkage mechanism. Although the moving jaw is subjected to a great crushing reaction. Its eccentric shaft and connecting rod are subjected to a little force. So it is often made into large and medium-sized machines for crushing hard materials in the industry. In addition, when the crushers work, the movement track of each point on the moving jaw is a circular arc with the center of the center axis.

The radius of the circular arc is equal to the distance from the point to the axis. The upper arc is small, the lower arc is large, and the crushing efficiency is low. The fragmentation ratio is generally 3-6. Because the movement track is simply so-called a single toggle jaw crusher. The structure of the single toggle jaw crusher is compact and simple, and the force of transmission parts such as eccentric shaft is small. The vertical displacement of the movable jaw is small, the material is less excessively broken and the wear of movable jaw plate is small.

The upper end of the movable jaw is directly suspended on the eccentric shaft. As the connecting rod of the crank connecting Rod mechanism, the lower end of the movable jaw is supported on the back wall of the frame by the thrust plate. When the eccentric axis rotates, the track of each point on the movable jaw is from the circumference line of the suspension point (the radius is equal to the eccentric distance), and gradually becomes an ellipse. The movement track of each point on moving jaw is more complex in this kind of machine, so it is called a double toggle jaw crusher.

Compared with the single toggle jaw stone crusher, the double-toggle jaw crusher has the following advantages: less weight, fewer components, more compact structure, a better filling degree in the crushing chamber, even crushing of the loaded material block, and forced unloading of the finished product by moving the lower jaw. Therefore, productivity is higher, 20-30% higher than that of the single-toggle of the same specification. And the material block has a bigger up-down rolling motion in the lower part of the moving jaw, so it is easy to be discharged in the shape of a cube.

First of all, the choice of the crusher machine is determined by the size of feeding and discharging. The feeding degree, product size is coarse, choose the big jaw crusher or more coarse, otherwise use medium and fine. In the calculation of feed size, the maximum open-side feed size is multiplied by 0.85. And the average size of the product is calculated by dividing the maximum feed size by the crushing ratio. In general, the feed size distribution of jaw crushers cannot exceed 10 %. If more than 10 %, the power consumption will increase and the product size will become flaky.

Secondly, when choosing the liner of jaw stone crushers equipment, the user must consider three factors: output, power consumption and wear resistance of liner. In general, the following principles should be followed: maximum feeding size, size change, the size distribution of feeding, the hardness of a material, Abrasion Resistance of materials. The longer the jaw crusher liner, the higher the power consumption, hard materials choose short liner, soft materials choose longliner. In the distribution of materials, thin materials choose short liner, coarse materials choose longliners.

Finally, the crusher in the work, feeding to uniform, can not segregation. If the uneven feeding will occur production capacity reduction, product size is too large, frequent spring action, bowl-shaped bearing pressure, power consumption rise. And it must have iron remover to prevent crushing chamber over iron. If frequent over iron, it may cause shaft broken accident. The moisture content of viscous materials can affect the amount of material through. In terms of moisture content of materials, generally not more than 5 %. In the use of power: Standard stone crusher should reach 75% ~ 80 %, short head crusher should reach 80% ~ 85 %.

Jiangxi Shicheng stone crusher manufacturer is a new and high-tech factory specialized in R&D and manufacturing crushing lines, beneficial equipment,sand-making machinery and grinding plants. Read More

jaw crusher working principle

jaw crusher working principle

A sectional view of the single-toggle type of jaw crusher is shown below.In one respect, the working principle and application of this machine are similar to all types of rock crushers, the movable jaw has its maximum movement at the top of the crushing chamber, and minimum movement at the discharge point. The motion is, however, a more complex one than the Dodge motion, being the resultant of the circular motion of the eccentric shaft at the top of the swing jaw. combined with the rocking action of the inclined toggle plate at the bottom of this jaw. The motion at the receiving opening is elliptical; at the discharge opening, it is a thin crescent, whose chord is inclined upwardly toward the stationary jaw. Thus, at all points in the crushing chamber, the motion has both, vertical and horizontal, components.

It will be noted that the motion is a rocking one. When the swing jaw is rising, it is opening, at the top, during the first half of the stroke, and closing during the second half, whereas the bottom of the jaw is closing during the entire up-stroke. A reversal of this motion occurs during the downstroke of the eccentric.

The horizontal component of motion (throw) at the discharge point of the single-toggle jaw crusher is greater than the throw of the Dodge crusher at that point; in fact, it is about three-fourths that of Blake machines of similar short-side receiving-opening dimensions. The combination of favorable crushing angle, and nonchoking jaw plates, used in this machine, promotes a much freer action through the choke zone than that in the Dodge crusher. Capacities compare very favorably with comparable sizes of the Blake machine with non-choking plates, and permissible discharge settings are finer. A table of ratings is given.

The single-toggle type jaw crusher has been developed extensively. Because of its simplicity, lightweight, moderate cost, and good capacity, it has found quite a wide field of application in portable crushing rigs. It also fits into the small, single-stage mining operation much better than the slower Dodge type. Some years since this type was developed with very wide openings for reduction crushing applications, but it was not able to seriously challenge the gyratory in this field, especially when the high-speed modern versions of the latter type were introduced.

Due to the pronounced vertical components of motion in the single-toggle machine, it is obvious that a wiping action takes place during the closing strokes; either, the swing jaw must slip on the material, or the material must slip along the stationary jaw. It is inevitable that such action should result in accelerated wear of the jaw plates; consequently, the single-toggle crusher is not an economical machine for reducing highly abrasive, or very hard, tough rock. Moreover, the large motion at the receiving opening greatly accentuates shocks incidental to handling the latter class of material, and the full impact of these shocks must be absorbed by the bearings in the top of the swing jaw.

The single-toggle machine, like the Dodge type, is capable of making a high ratio-of-reduction, a faculty which enables it to perform a single-stage reduction of hand-loaded, mine run ore to a suitable ball mill, or rod mill, feed.

Within the limits of its capacity, and size of receiving openings, it is admirably suited for such operations. Small gravel plant operations are also suited to this type of crusher, although it should not be used where the gravel deposit contains extremely hard boulders. The crusher is easy to adjust, and, in common with most machines of the jaw type, is a simple crusher to maintain.

As rock particles are compressed between the inclined faces of the mantle and concaves there is a tendency for them to slip upward. Slippage occurs in all crushers, even in ideal conditions. Only the particles weight and the friction between it and the crusher surfaces counteract this tendency. In particular, very hard rock tends to slip upward rather than break. Choke feeding this kind of material can overload the motor, leaving no option but to regulate the feed. Smaller particles, which weigh less, and harder particles, which are more resistant to breakage, will tend to slip more. Anything that reduces friction, such as spray water or feed moisture, will promote slippage.

Leading is a technique for measuring the gap between fixed and moveable jaws. The procedure is performed while the crusher is running empty. A lead plug is lowered on a lanyard to the choke point, then removed and measured to find out how much thickness remains after the crusher has compressed it. This measures the closed side setting. The open side setting is equal to this measurement plus the throw of the mantle. The minimum safe closed side setting depends on:

Blake (Double Toggle) Originally the standard jaw crusher used for primary and secondary crushing of hard, tough abrasive rocks. Also for sticky feeds. Relatively coarse slabby product, with minimum fines.

Overhead Pivot (Double Toggle) Similar applications to Blake. Overhead pivot; reduces rubbing on crusher faces, reduces choking, allows higher speeds and therefore higher capacities. Energy efficiency higher because jaw and charge not lifted during cycle.

Overhead Eccentric (Single Toggle) Originally restricted to sampler sizes by structural limitations. Now in the same size of Blake which it has tended to supersede, because overhead eccentric encourages feed and discharge, allowing higher speeds and capacity, but with higher wear and more attrition breakage and slightly lower energy efficiency. In addition as compared to an equivalent double toggle, they are cheaper and take up less floor space.

Since the jaw crusher was pioneered by Eli Whitney Blake in the 2nd quarter of the 1800s, many have twisted the Patent and come up with other types of jaw crushers in hopes of crushing rocks and stones more effectively. Those other types of jaw crusher inventors having given birth to 3 groups:

Heavy-duty crushing applications of hard-to-break, high Work Index rocks do prefer double-toggle jaw crushers as they are heavier in fabrication. A double-toggle jaw crusher outweighs the single-toggle by a factor of 2X and well as costs more in capital for the same duty. To perform its trade-off evaluation, the engineering and design firm will analyze technical factors such as:

1. Proper selection of the jaws. 2. Proper feed gradation. 3. Controlled feed rate. 4. Sufficient feeder capacity and width. 5. Adequate crusher discharge area. 6. Discharge conveyor sized to convey maximum crusher capacity.

Although the image below is of a single-toggle, it illustrates the shims used to make minor setting changes are made to the crusher by adding or removing them in the small space between the crushers mainframe and the rea toggle block.

The jaw crusher discharge opening is the distance from the valley between corrugations on one jaw to the top of the mating corrugation on the other jaw. The crusher discharge opening governs the size of finished material produced by the crusher.

Crusher must be adjusted when empty and stopped. Never close crusher discharge opening to less than minimum opening. Closing crusher opening to less than recommended will reduce the capacity of crusher and cause premature failure of shaft and bearing assembly.

To compensate for wear on toggle plate, toggle seat, pitman toggle seat, and jaws additional shims must be inserted to maintain the same crusher opening. The setting adjustment system is designed to compensate for jaw plate wear and to change the CSS (closed side setting) of the jaw crusher. The setting adjustment system is built into the back frame end.

Here also the toggle is kept in place by a compression spring. Large CSS adjustments are made to the jaw crusher by modifying the length of the toggle. Again, shims allow for minor gap adjustments as they are inserted between the mainframe and the toggle block.

is done considering the maximum rock-lump or large stone expected to be crushed and also includes the TPH tonnage rate needing to be crushed. In sizing, we not that jaw crushers will only have around 75% availability and extra sizing should permit this downtime.

As a rule, the maximum stone-lump dimension need not exceed 80% of the jaw crushers gape. For intense, a 59 x 79 machine should not see rocks larger than 80 x 59/100 = 47 or 1.2 meters across. Miners being miners, it is a certainty during day-to-day operation, the crusher will see oversized ore but is should be fine and pass-thru if no bridging takes place.

It will be seen that the pitman (226) is suspended from an eccentric on the flywheel shaft and consequently moves up and down as the latter revolves, forcing the toggle plates outwards at each revolution. The seating (234) of the rear toggle plate (239) is fixed to the crusher frame; the bottom of the swing jaw (214) is therefore pushed forward each time the pitman rises, a tension rod (245) fitted with a spring (247) being used to bring it back as the pitman falls. Thus at each revolution of the flywheel the movable jaw crushes any lump of ore once against the stationary jaw (212) allowing it to fall as it swings back on the return half-stroke until eventually the pieces have been broken small enough to drop out. It follows that the size to which the ore is crushed.

The jaw crusher is not so efficient a machine as the gyratory crusher described in the next paragraph, the chief reason for this being that its crushing action is confined to the forward stroke of the jaw only, whereas the gyratory crusher does useful work during the whole of its revolution. In addition, the jaw crusher cannot be choke-fed, as can the other machine, with the result that it is difficult to keep it working at its full capacity that is, at maximum efficiency.

Tables 5 and 6 give particulars of different sizes of jaw crushers. The capacity figures are based on ore weighing 100 lb. per cubic foot; for a heavier ore, the figures should be increased in direct proportion to its weight in pounds per cubic foot.

The JAW crusher and the GYRATORY crusher have similarities that put them into the same class of crusher. They both have the same crushing speed, 100 to 200 R.P.M. They both break the ore by compression force. And lastly, they both are able to crush the same size of ore.

In spite of their similarities, each crusher design has its own limitations and advantages that differ from the other one. A Gyratory crusher can be fed from two sides and is able to handle ore that tends to slab. Its design allows a higher-speed motor with a higher reduction ratio between the motor and the crushing surface. This means a dollar saving in energy costs.

A Jaw crusher on the other hand requires an Ely wheel to store energy. The box frame construction of this type of crusher also allows it to handle tougher ore. This design restricts the feeding of the crusher to one side only.

The ore enters from the top and the swing jaw squeezes it against the stationary jaw until it breaks. The broken ore then falls through the crusher to be taken away by a conveyor that is under the crusher.Although the jaws do the work, the real heart of this crusher is the TOGGLE PLATES, the PITMAN, and the PLY WHEEL.

These jaw crushers are ideal forsmall properties and they are of the high capacity forced feed design.On this first Forced Feed Jaw Crusher, the mainframe and bumper are cast of special alloy iron and the initial cost is low. The frame is ribbed both vertically and horizontally to give maximum strength with minimum weight. The bumper is ruggedly constructed to withstand tremendous shock loads. Steel bumper can be furnished if desired. The side bearings are bronze; the bumper bearings are of the antifriction type.

This bearing arrangement adds both strength and ease of movement. The jaw plates and cheek plates are reversible and are of the best-grade manganese steel. The jaw opening is controlled by the position of an adjustable wedge block. The crusher is usually driven by a V-to-V belt drive, but it can be arranged for either V-to-flat or fiat belt drive. The 8x10 size utilizes a split frame and maybe packed for muleback transportation. Cast steel frames can be furnished to obtain maximum durability.

This second type of forced feed rock crusher is similar in design to the Type H listed above except for having a frame and bumper made of cast steel. This steel construction makes the unit lighter per unit of size and adds considerable strength. The bearings are all of the special design; they are bronze and will stand continuous service without any danger of failure. The jaw and cheek plates are manganese steel; and are completely reversible, thus adding to their wearing life. The jaw opening is controlled by the position of an adjustable wedge block. The crushers are usually driven by V-to-V but can be arranged for V-to-flat and belt drive. The 5x6 size and the 8x10 size can be made with sectionalized frame for muleback transportation. This crusher is ideal for strenuous conditions. Consider a multi jaw crusher.

Some jaw crushers are on-floor, some aboveground, and others underground. This in many countries, and crushing many kinds of ore. The Traylor Bulldog Jaw crusher has enjoyed world wide esteem as a hard-working, profit-producing, full-proof, and trouble-free breaker since the day of its introduction, nearly twenty years ago. To be modern and get the most out of your crushing dollars, youll need the Building breaker. Wed value the privilege of telling you why by letter, through our bulletins, or in person. Write us now today -for a Blake crusher with curved jaw plates that crush finer and step up production.

When a machine has such a reputation for excellence that buyers have confidence in its ability to justify its purchase, IT MUST BE GOOD! Take the Type G Traylor Jaw Crusher, for instance. The engineers and operators of many great mining companies know from satisfying experience that this machine delivers a full measure of service and yields extra profits. So they specify it in full confidence and the purchase is made without the usual reluctance to lay out good money for a new machine.

The success of the Type G Traylor Jaw Crusheris due to several characteristics. It is (1) STRONG almost to superfluity, being built of steel throughout; it is (2) FOOL-PROOF, being provided with our patented Safety Device which prevents breakage due to tramp iron or other causes of jamming; it is (3) ECONOMICAL to operate and maintain, being fitted with our well-known patented Bulldog Pitman and Toggle System, which saves power and wear by minimizing frictionpower that is employed to deliver increased production; it is (4) CONVENIENT to transport and erect in crowded or not easily accessible locations because it is sectionalized to meet highly restrictive conditions.

Whenever mining men need a crusher that is thoroughly reliable and big producer (which is of all time) they almost invariably think first of a Traylor Type G Jaw Crusher. By experience, they know that this machine has built into it the four essentials to satisfaction and profit- strength, foolproofness, economy, and convenience.

Maximum STRENGTH lies in the liberal design and the steel of which crushers parts are made-cast steel frame, Swing Jaw, Pitman Cap and Toggles, steel Shafts and Pitman rods and manganese steel Jaw Plates and Cheek Plates. FOOLPROOFNESS is provided by our patented and time-tested safety Device which prevents breakage due to packing or tramp iron. ECONOMY is assured by our well-known Bulldog Pitman and Toggle System, which saves power and wear by minimizing friction, the power that is used to deliver greater productivity. CONVENIENCE in transportation and erection in crowded or not easily accessible locations is planned for in advance by sectionalisation to meet any restrictive conditions.

Many of the worlds greatest mining companies have standardized upon the Traylor Type G Jaw Crusher. Most of them have reordered, some of them several times. What this crusher is doing for them in the way of earning extra dollars through increased production and lowered costs, it will do for you! Investigate it closely. The more closely you do, the better youll like it.

single toggle jaw crusher with unique benefits | hxjq

single toggle jaw crusher with unique benefits | hxjq

There are two kinds of jaw crushers, double toggle jaw crusher and single toggle jaw crusher. In the work of the former jaw crusher, the swing jaw only moveslikea simple arc, so it is also known as simple pendulum jaw crusher, the swing jaw of the latter one moves in an arc at the same time also moves up and down, so it is also known as complex pendulum jaw crusher.

Single toggle jaw crusher is widely used in many industries nowadays and fully replace the double one in actual use because of its advantages of simple structure and easy operation. It deals with all kinds of hard and soft ores and rocks by the extrusion and bending of the two jaw plates: the swing jaw and the fixed jaw. The ores after being crushed can be applied in mining, construction, hydraulic project, chemical industry, etc.

Double toggle jaw crusher is designed for the hardest stones and rocks, tough and abrasive materials, and ferrous metals. But the single one can crush less hard and medium-hardness ores, and deals with a variety of stones and rocks with compressive strength within 320 MPa.

The former crusher can process 5-500 tonsof materials per hour so it can't satisfy larger capacity requirements. While the latter one is suitable for processing 1-2000 tons per hour. Customers can adjust the range of capacity.

The feeding size of the former crusher is about 1,250 mm, and the maximal output size is 20 mm that is decided by the feeding material size. The latter crusher processes larger feeding materials with the maximal size of 1,600 mm. And the adjustment range of the discharging size is also wide from 10 mm to 350 mm.

The working principle ofsingle toggle jaw crusheris that the generator drives the eccentric shaft to rotate through the belt and pulley, and the swing jaw plate reciprocates periodically around the eccentric shaft to the fixed jaw plate, sometimes it is close to the fixed jaw and sometimes it leaves.

When the swing jaw plate is close to the fixed jaw plate, the ores between the two jaw plates are crushed, bent and split. And when the swing jaw plate leaves the fixed one, the crushed ore is discharged through the discharging opening under the action of gravity. Because of the complex trajectory of each point on the swing jaw, it is also called as the complex pendulum jaw crusher.

It works in much the same way as the double one, except that the movements of the swing jaw are different. The double toggle crusher crushes stones by compressing the feeding material between two huge jaw plates. Each point on the swing jaw is an arc line with the suspension axis as the center. Due to its simple movement track, it is called simple pendulum jaw crusher.

Its frame is cast in sections and then bolted together. The casting process is complex. It is mainly used to support the eccentric shaft and bear the impact force of materials, so it requires to be strong enough. The rack of the double one can be welded by a40-50 mm-thick steel plate, but the quality is not as good as cast steel.

The plates comprise a swing jaw plate and a fixed jaw plate. They are fixed on the surface of the jaw bed with wedge-shaped iron block and bolt to protect the jaw bed from abrasion. Usually they are manufactured with high strength and wear-resistant materials, like cast manganese steel jaw, themanganese content in cast steel is 12% - 14%. If the conditions are limited, cast iron can be used instead, but the jaw plate is easy to wear and break, thus the service life is short.

The single toggle type is stronger than the double one, but because of the characteristics of the movement track of the jaw plate, its bottom part is worn out faster than the top, so it is often made into a symmetrical shape, so that the jaw can be installed upside-down after wear, extending the service life.

The crusher with single toggle is a precisely calculated cast iron piece used to adjust the size of the discharge opening and to compensate for wear parts of the jaw plate, toggle plate and toggle plate cushion. The integral toggle plate is used because of its smaller weight and size.

The flywheel is usually made of cast iron or cast steel. It is used to store the energy of swing jaw, and then used for anindustrial formation to make the machine work more uniformly. The smaller crushers are always equipped with anintegral flywheel.

The regulating device adopts wedge type, which is composed of a front and a rear wedge blocks. The front wedge block can move back and forth to support the rear plate. The rear wedge is adjustable, which can move up and down. It moves up and down by the screw and the size of the discharging opening is adjusted. The inclined plane of the two wedge pieces is inverted to fit.

The crusher is light and simple in structure, so it is easy to install and be used in mobile equipment (compared with the double toggle crusher, it is short of some parts, including one connecting rod, one bracket, one spindle and a pair of bearings).

The up and down movement of the swing jaw can promote the discharge of materials, and the horizontal distance of its upper part is farther than that of its lower part, which is easy to crush large pieces of materials, so its crushing efficiency is higher than the double one with the same specification (20-30%), and the crushing ratio is larger (it is general 6-8).

This crusher is smaller in size. It is easy for operators to check and change the parts. General workers can deal with its maintenance. It is almost impossible to get clogging compared with the double toggle crusher.

Generally speaking, the vertical movement track of the crusher is large, and the grinding effect of stone on the jaw plate is severe. We adopt high manganese steel cast to manufacture the plates to strengthen its wear resistance.

In recent years, double toggle jaw crusher has been forgotten by customers all over the world. The majority of the manufacturers do not choose this crusher anymore. But fewer customers seems to choose it because of their lower budget. At the beginning of last year, Mr. Ramli from Indonesia consulted our company on the Internet, he wanted to process coal gangue with a crusher.

As we all know, coal gangue is a kind of black and gray rock with lower carbon content and harder than coal, associated with the coal seam in the process of the coal formation. The application range is very extensive, and the utilization rate is high. Its value will increase especially after processing by mining equipment. But it will produce a lot of dust when piled up in the open air.

He said that he was looking for a cheaper crusher that can produce less pollution. He checked the Internet before, and found that double toggle type crusher produced less dust, so he wanted to buy it.

However, we learned that the customer wanted to process 500 tons gangue per hour. After the customer service staff introduced the double toggle crusher to the customer online, they suggested him to use the single one. The technical manager made a phone call to him to explain the differences between these two type crushers in detail. Mr. Ramli said that he had checked the data, single toggle crusher could produce much dust with a higher cost, so it could not be used in his project.

We sent a detailed equipment diagram to the customer, telling him that the single one with a large crushing ratio and capacity is lighter and easier to install. Most importantly, we have redesigned and manufactured the single toggle crusher with new technology, and has been selected by many users.

Mr. Ramli still could not decide which crusher to choose. Therefore, we found a production site nearest to him. After the site investigation, he was satisfied with the single toggle crusher with large production capacity and less pollution, and finally, he decided to buy this crusher to process gangue.

We also sent technical engineers to his production site to help him install and operate. After learning, the workers of his company all said that single toggle jaw crusher was easy to operate. The customer was very satisfied with the on-site work of it.

Single toggle crusher and the double one have their own advantages and disadvantages in practical application. The latter one is cheaper, but it has gradually been withdrawn from the market due to its heavy weight, complicated structure and difficult maintenance. The former one is in great demand in the world now and is selected by many mining and quarrying factories.

And in recent years, with the expansion of the demand for environment-friendly equipment, crusher manufacturers are investing more innovative talents and high-tech to constantly transform and evolve single toggle crusher, striving to reduce energy consumption and pollution. Crusher users also pay more attention to the daily maintenance of equipment, they learn the maintenance methods for prolonging the service life to reduce the losses.

difference between single & double toggle jaw crusher

difference between single & double toggle jaw crusher

A double toggle jaw crusher is much larger, heavier, more moving parts and lower throughput than modern single toggle jaw crushers. The lower throughput statement is a bit misleading because its partially attributed to the type of bearings they have versus modern crushers, so if one was to upgrade the bearings, throughput could be closer to that of a modern jaw.

Anyway, double toggle jaw crushes are really more about where the eccentric is located than anything. In a double toggle jaw crusher, the eccentric is located behind the swinging jaw. This has two main effects, it keeps the eccentric out of harms way because there is no shock loading from the rock being crushed being transferred to the eccentric shaft and bearings. The other effect is a limited plane of motion for the swinging jaw which contributes to its lack of productivity. The jaw moves like a swinging door that is hinged at the top and is being pushed open and pulled closed at the bottom. One toggle plate goes from the bottom of the eccentric arm to the bottom of the swinging jaw, the other toggle plate goes from the opposite side of the bottom of the eccentric arm to a fixed point at the very back of the jaw crusher frame.

In contrast, the single toggle jaw crusher has fewer shafts and bearings and only one toggle which goes from the bottom of the swinging jaw to a fixed point at the back of the jaw crusher. The eccentric is located at the top of the swinging jaw and is part of the shaft. The advantage of this is that the jaw has two motions that are happening at the same time. It has the same swinging door motion that the double toggle has, but also has the up and down motion from the eccentric.

The advent of curved jaw crusher wearing plates made an approach other than segmental layout analysis desirable for prediction of capacities. For some time it had been known that the drawing board capacities of crushers using these plates had to be considerably modified by complicated experience factors to achieve agreement with results. Because these apparent capacities could be readily increased severalfold by minor crushing chamber shape changes, it was necessary that the utmost precaution be taken in predicting capacities of jaw plates modified for nonchoking, special wear characteristics, or any other reason.

While this paper is concerned principally with standard type single-toggle crusher capacities, the evaluation of data obtained with these machines is simplified by comparative reduction to the 10 x 7 in. Blake-type equivalents upon which the summary of the preceding paper was made. Convertibility of data from one type of crusher to the other also tends towards confirmation of both. The agreement of these data is sufficient to be considered complimentary. Consequently the feed factors, f, previously reported for Blake crushers are slightly adjusted to an average with the single-toggle crusher results.

d is the apparent density of the broken product in pounds per cubic foot. (If the true specific gravity of the feed is known, 40 pct voids may be assumed and d becomes 37.4 times sp gr). w is the width of crushing chamber in inches. y is the open side setting of the crusher, in inches. In the case of corrugated jaw plates it is measured from the tip of one corrugation to the bottom of the valley opposite. t is the length of jaw stroke in inches at the bottom of the crushing chamber. It is the difference between open and close-side settings. n is rpm, or crushing cycles per minute. a is the nip-angle factor.

To bring the Blake and single-toggle type crusher capacity test results to common terms for evaluation, all data are converted to terms of 10 x 7 in. Blake-type performance at conditions of 100 lb per cu ft, 10 in. chamber width, 250 rpm, 0.65 in. stroke, 3-in. open-side setting, and 18 nip-angle. (The nip-angle of the 107 in. Blake is 18 at 3-in. setting.) The single-toggle crusher performances are also divided by the eccentric throw to bring this effect to unity.

In the Blake-type crusher tests, no capacity variation was noted for materials of different crushabilities, even though a wide range of materials was tested. These feeds had impact strengths ranging from 2.8 to 31 ft lb per in. of thickness as measured by the Bond method, (potash, coke, soft hematite, limestones, traprock, taconites.)

Greater differences in crushability-capacity effect than those just discussed for single-toggle type crushers have been reported by investigators working with small Dodge-type crushers. However, these crushers have rubbing motion between the jaws at the discharge, and in addition have very little jaw stroke at the discharge.

double-toggle blake crusher | henan deya machinery co., ltd

double-toggle blake crusher | henan deya machinery co., ltd

The distinctive feature of this class of crusher is the two plates which open and shut like animal jaws. The jaws are set at an acute angle to each other, and one jaw is pivoted so that it swings relative to the other fixed jaw. Material fed into the jaws is alternately nipped and released to fall further into the crushing chamber. Eventually it falls from the discharge aperture.

Jaw crushers are classified by the method of pivoting the swing jaw (see attached figure). In the Blake crusher the jaw is pivoted at the top and thus has a fixed receiving area and a variable discharge opening. In the Dodge crusher the jaw is pivoted at the bottom, giving it a variable feed area but fixed delivery area. The Dodge crusher is restricted to laboratory use, where close sizing is required, and is never used for heavy-duty crushing as it chokes very easily. The Universal crusher is pivoted in an intermediate position, and thus has a variable delivery and receiving area. Read more

difference between double and single toggle jaw crusher

difference between double and single toggle jaw crusher

The main difference between Double and Single Toggle Jaw Crusher is the location of the eccentric shaft. In double toggle machines, the eccentric shaft is located behind the swing jaw, and the swing jaw is pivoted separately from another shaft. On the other hand, the swing jaw of single toggle jaw crusher is pivoted directly on the eccentric shaft. This helps the single toggle crusher achieve a more aggressive crushing stroke, and hence the apparent popularity.

That said, Double Toggle Jaw Crushers have been hugely successful in the past. They offer a better operational economy as compared to Single Toggle Jaw Crushers. The jaw plate consumption is less by almost 4 times and the percentage of fines generated is also smaller.

Double toggle jaw crushers, however, are heavier and require much larger headroom than single toggle machines. They therefore are generally unsuitable for mobile operations. To add to that, they accept smaller feed size and have a much lower throughput. They are also prone to choking and bridging while crushing. In contrast, single toggle jaw crushers have fewer moving parts and aggressive crushing strokes. Being technologically superior, they have mostly replaced the double toggle jaw crushers.

In a Double Toggle Jaw Crusher the eccentric shaft is located behind the swinging jaw. This protects the eccentric shaft and bearings from the shock loading. Two toggle plates from either side of the pitman are respectively connected to the back of the crusher and the swing jaw.

As the eccentric shaft rotates, reciprocation of the pitman causes to and fro swinging door motion of the moving jaw. This creates a powerful compression in the crushing chamber. Thus a double toggle jaw crusher is more effective for crushing very strong abrasive rocks. Since there is no other plane of motion, there is lesser wear and tear of the jaw plate but also lesser throughput.

Single toggle jaw crusher is a modern design which is lighter, has greater throughput and is less expensive than a double toggle jaw crusher. The eccentric shaft in this design acts as the pivot as well as the actuator for the reciprocation. The toggle plate directly connects the back of the crusher to the swinging jaw.

The single toggle jaw crusher has fewer bearings and shafts as compared to a double toggle jaw crusher. It has more planes of movement of the swinging jaw (Hinge door movement plus vertical up and down movement) which leads to higher throughput. On the downside, it produces more fines, and has a higher jaw plate consumption.

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