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Jaw crusher maintenance includes minor repair, medium repair and overhaul. There are details introductions for three maintenances as follow.

(1) Minor repair can be done every half month or at least one month. It mainly includes check and repairs the upper pendulum device, dust collector, the eccentric shaft, bevel gear, check disc, wear and lubrication of drive shaft bushing, lubrication system and lubricating oil replacement. Check and repair liners wear and tight state. Besides, every time minor repair should depend on the practical situation. It is not necessarily check every aspects.

(2) Medium repair cycle is mainly decided by wear situation of crushing liner and shaft bushing. Generally, medium repairs should be done every half year or one year. Except from all content of minor repairments, the repairment includes replacement of cone crusher lining and bed liner plate; Repair and replace shaft bearing, shaft bushing, cone tooth gear and the wear parts of pendulum device; Repair and replace the eccentric shaft, eccentric shaft liner and thrust disc, etc. Besides, every time medium repair should depend on the practical situation. It is not necessarily check every aspect.

(3) Overhaul is done every 5 years. The maintenance includes all the content of medium repair. It is mainly repairing and replacing frame, centre rest and beam as well as the base. Overhaul often combines with technology reformation. The cycle of medium repair and overhaul depends on the hardness of broken ore. Meanwhile, it is also related to the work quality of daily maintenance. Therefore, intensify daily maintenance work and improve the quality are the key to guarantee machine in normal operation. ore beneficiation:http://www.hxjq-crusher.com/63.html
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As a matter of fact, the service life of mining machine is relatively short. So, we should pay more attention to the parts damage degree and the shortest storage time, for fear that it brings too much unnecessarily trouble. The reasons for machine trouble includes human factors such as long use time, improper maintenance, and natural factors such as machinery parts wear, corrosion, cavition and other factors. While, the former can be avoided, the latter can’t. If we know clearly the causes of machine trouble, understand the damage regulations and take measures timely from design, manufacturing to running and maintenance, we can reduce damage and prolong service time.

Typical mining machinery trouble analysis

As for jaw crusher, the spindle is key part, which consists of cone with cone lining. There are many broken shaft accidents happened due to various reasons. Statics shows that over 20 accidents happened in Anshan mining company since production, among of which, more than 90% broken areas are in threading insert relief notch.

In the stone quarry plant, jaw crusher is used for coarse crushing process to produce small particles for building aggregates.

Jaw Crusher is widely used in mining, building materials, chemical industry, metallurgy and so on. The Jaw Crusher is suitable for primary and secondary crushing all kinds of minerals and rocks with compressive strength less than 320 MPa.

Jaw Crusher is a primary crushing machine used for coarse crushing plant in stone quarrying and mine ore mining process. It has properties of large crushing ratio, even granularity, simple structure, reliable operation, easy maintenance, and low cost. So this kind of jaw crusher can be widely used in mining, metallurgy, iron ore, building material, highway, railway, water project, chemical industry, etc, for crushing various materials with compression strength less than 320MPa.

Jaw crushers are equipped with one fixed and one moveable crushing jaw (moving jaw), both of which support crushing plates (wearing parts) in several versions. They form. a wedge-shaped crushing zone. The walls of the crushing zone are made of replaceable wearing sheets. Crushing is done between the two crushing jaws. The moving jaw of the single toggle jaw crusher moves elliptically. A pendulum motion is being carried out by the double toggle jaw crusher. lake jaw crusher is is widely used in mining and quarry.

The crushing force is produced by an eccentric shaft. Then it is transferred to the crushing zone via a toggle plate system and supported by the back wall of the housing of the machine. Spring pulling rods keep the whole system in a condition of non-positive connection. Centrifugal masses on the eccentric shaft serve as compensation for heavy loads. A flywheel is provided in the form. of a pulley. Due to the favorable angle of dip between the crushing jaws, the feeding material can be reduced directly after entering the machine. The final grain size distribution is influenced by both, jaw crusher is the adjustable crusher setting and the suitability of the tooth form. selected for the crushing plates. sand maker:http://www.crusher-machine.com/18.html
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The following is the process of jaw crushing plant:

The Big materials are fed to the primary jaw crusher evenly and gradually by vibrating feeder through a hopper for the primary crushing. After first crushing, the material will transferred to impact crusher or cone crusher by belt conveyor for secondary crushing; the crushed materials will then transferred to vibrating screen for separating.

After being separated, the parts that can meet standard will be taken away as final products, while the other parts will be returned to impact crusher, thus forming a closed circuit. Size of final products can be combined and graded according to customer specific requirement. We can also equip dust catcher system to protect environment.

Jaw crusher maintenance features finite element analysis technology, top manufacturing materials, higher crushing strength, simple structure, safer and convenient, which has greatly extended the bearing’s service life. Due to the tooth guard, the whole cast steel of the bearing seat has greatly improved the production, and have definitely occupied the leading position in our China’s machinery area.

With the rapid development of mining industry in recent years, mining equipment industry has gradually been driven up. Before the mining industry has not developed to a certain size, concentrator, coal preparation plant and others adopt small and medium crushing equipments generally. And as the production capacity of various industries is gradually increasing in recent years, the production capacity has not kept up with production needs, many manufacturers have more for large crushing equipment and ore equipment. Then large jaw crusher came into being.

In the mining equipment, the production capacity of large jaw crusher is obvious, this high energy, high throughput of ore crusher are generally used in large scale ore, coal preparation plant and other crushing industries, but at present large jaw crusher machine manufacturers are very few.

The jaw crusher is no stranger to the mining machinery industry, jaw crusher is the reason why the industry recognized and accepted, and the device itself practicality firmly inseparable. 21st century crusher, impact crusher, cone crusher, one after another. Regardless of the device is not comparable to the practicality, energy efficiency, or in terms of production efficiency, can jaw crusher want. Eastern Heavy Industry was founded in the early stage of development of mining machinery in China, is one of the domestic mining machinery companies at the early start. After years of development has been the outcome of our jaw crusher to enter the international market and exported to the Middle East, East Asia, Southeast Asia, South Africa and other countries, in terms of the amateur, the jaw crusher is a very old gravel equipment, such the antique Why is still in use? sand maker:http://www.hxjqchina.com/product-list_57.html
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In fact, the jaw crusher of Engineering Mechanics and the perfect combination of mechanical discipline, which is a jaw crusher prolonged unbeaten secret. Jaw crusher opportunities for such a great market value, and therefore one of the jaw crusher have been imitated equipment of various manufacturers. Red Star Heavy adheres to the scientific and technological innovation, first-class production technology, and innovation strength, Red Star Heavy jaw crusher has been imitated never surpassed. Red Star Heavy Industries has a superior research capability, and theoretical knowledge of R & D team, market feasibility studies and market forecasts, jaw crusher must have the diversity to adapt to the needs of the various sectors of the jaw crusher. Developed from scratch in many ways, Red Star Heavy jaw broken after years of effort, on the basis of the existing jaw crusher, not only developed a large jaw crusher, small jaw crusher, also developed a pex The ultra-fine jaw crusher and jaw-breaking mobile crushing station. 

A Jaw Crusher is one of the main types of primary crushers in a mine or ore processing plant. The size of a jaw crusher is designated by the rectangular or square opening at the top of the jaws (feed opening). For instance, a 24 x 36 jaw crusher has a opening of 24' by 36', a 56 x 56 jaw crusher has a opening of 56' square. Primary jaw crushers are typically of the square opening design, and secondary jaw crushers are of the rectangular opening design. However, there are many exceptions to this general rule.

A Jaw Crusher reduces large size rocks or ore by placing the rock into compression. A fixed jaw, mounted in a 'V' alignment is the stationary breaking surface, while the movable jaw exerts force on the rock by forcing it against the stationary plate. The space at the bottom of the 'V' aligned jaw plates is the crusher product size gap, or the size of the crushed product from the jaw crusher. The rock remains in the jaws until it is small enough to pass through the gap at the bottom of the jaws.

Jaw Crushers are designed to impact on a rock particle placed between a fixed and a moving plate (jaw). The faces of the plates are made of hardened steel. Both plates could be flat or the fixed plate flat and the moving plate convex. The surfaces of both plates could be plain or corrugated. The moving plate applies the force of impact on the particles held against the stationary plate. Both plates are bolted on to a heavy block. The moving plate is pivoted at the top end (Blate crusher) or at the bottom end (Dodge-type crusher) and connected to an eccentric shaft. In universal crushers the plates are pivoted in the middle so that both the top and the bottom ends can move. ball mills:http://www.hx-crushers.com/p72.html
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The Blake crushers are single or double toggle drives. The of the toggle(s) is to move the pivoted jaw. The retrieving action of the jaw from its furthest end of travel is by springs for small crushers or by a pitman for larger crushers. As the reciprocating action removes the moving jaw away from the fixed jaw the broken rock particles slip down, but are again caught at the next movement of the swinging jaw and crushed. This process is repeated until the particles sizes are smaller than the smallest opening between the crusher plates at the bottom of the crusher(the closed set). For a smooth reciprocating action of the moving jaws, heavy flywheels are used in both types of crushers.

Jaw crusher includes a list of vertical jaws, one jaw is fixed and also the other becoming moved forwards and backwards compared to it by way of a cam or pitman mechanism. The jaws are farther apart in the best than towards the bottom, forming a tapered chute to ensure that the fabric is crushed progressively smaller and smaller because it travels downward until it's tiny sufficient to emerge from in the bottom opening. The movement in the jaw might be fairly modest, because total crushing just isn't performed in 1 stroke. The inertia needed to crush the information is supplied with a weighted flywheel that moves a shaft producing an eccentric motion that triggers the closing from the gap.

Double and single toggle jaw crushers are created from high quality fabricated plate frames with reinforcing ribs all through. The crusher parts are of huge power style to just accept high energy draw. Manganese steel is employed for both fixed and movable jaw faces. Heavy flywheels permit crushing peaks on tough supplies. Double Toggle jaw crushers may possibly characteristic hydraulic toggle fine-tuning systems.

Jaw crusher is the main technical parameters of processing power and the maximum permissible feed size. The same specifications jaw crusher due to different design, its maximum permissible feed size is not the same, the width of the feed port to a fixed tooth plate tooth tip (bottom teeth) and the activities of the end of teeth-tooth (tooth tip) from the purpose of calculating the standard, while the number of international enterprises to a fixed tooth plate and calculated the distance between the activities of tooth plate, thus showing the same specifications of products, domestic products and foreign enterprises in fact are often small compared to a tooth deep distance, large-sized breakers teeth deep 60-100mm, and therefore domestic product are often too small to allow the feed size of 50-80mm. The jaw crushers exclusive mine mouth can be adjusted; corresponding to a different row of mine I have a different processing capabilities. Therefore, more processing power, we should determine the row of the same size as mine mouth. ball mill:http://www.hxjqchina.com/product-list_34.html
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Before the flow of stone crushing plant, firstly, raw materials are sent to the vibrating feeder through hopper, they are fed into rock jaw crusher evenly and continuously. After crushed by jaw crusher plant, materials are then sent into rock impact crusher where it will be through secondary crush which makes cubical shaped product. After second crushing, materials are sent to vibrating screen which will separate different products according to your requirements. While those particles haven't attained the required fineness will be returned to impact crusher for tertiary crushing. According to different techniques requirements, deploy with suitable model equipment, and develop its optimum behavior.

All the crusher spare parts have a variety of structural forms, the principle is the same, namely, by moving jaw to break the cyclical movement of materials in the movable jaw hanging around the center axis of the fixed jaw during the swing, is located between the two jaw materials will be crushed, split and bending combination effect. Initially, less stressful, so reducing the size of the material, the material close to each other, squeeze tight; when the pressure rises above the material's strength can bear, that place broken the contrary, when the movable jaw to leave the fixed jaw swing in the opposite direction, the downward movement of the material is by weight. Movable jaw of each cyclical movement of materials by a crushing effect, get some distance to the next row. After several cycles, the material begins to be broken from the machine outside the nesting population. With the motor continuously rotating and mobile jaw crusher for crushing and waste material movement cycle, to achieve mass production.

The workers applying jaw crusher know that after jaw crusher is used for some time, jaw crusher will have the shaking phenomenon. This action makes workers stop their work to check out shaking reason, so that they can repair the machine and restore production. In fact, as long as they pay more attention the machine at ordinary times, they can completely avoid this situation.

First, we should pay more attention screws fixing jaw crusher whether there is loose or rupture phenomenon. Jaw crusher needs to rely on the screws to be fixed on the ground. If the screw is coming loose or rupture, one side of the machine will happen firstly slight shaking. If we don’t tighten the loose screw or replace the screw of fracture in time, it will make the rest of the screw move easily or rupture, and then shaking phenomenon is more serious, even can damage the machine. As the professional manufacturer of complete sets of mining machinery, such as rotary kiln, Henan Hongxing is always doing the best in products and service. ball mills:http://www.hxjqchina.com/product-list_34.html
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The second, we should check fixed foundation whether there is loose phenomenon. As is known to all, building houses needs to lay the good foundation. If the foundation is instable, it will collapse. Jaw crusher is the same; it needs to rely on the solid foundation, so that it won’t shake. If the foundations of the jaw crusher are unstable or happen loose in the process of long-term use, they both will affect the jaw crusher’s stability. So we must play a good foundation of jaw crusher, and check whether the foundation is loosen in the later use process once in a while. if so, we should timely reinforce.

The third, if the flywheel has deviation from the slot position in use process of jaw crusher, it will make the machine unbalance. So that the machine gets shaking phenomenon.

The difference between an ordinary shaking table bed shaking table and our shaking tables are: increased bed area stripes; narrower bed smooth area; stripes with a certain angle of climb; the bed itself, the main longitudinal change; Article bed cross-sectional area shape and material aspects of change. The corresponding technical parameters of operation have some changes. In principle, the object is selected according to different sorting of different technical parameters.

Jaw Crusher Working Design:

A Jaw Crusher is one of the main types of primary crushers in a mine or ore processing plant. The size of a jaw crusher is designated by the rectangular or square opening at the top of the jaws (feed opening). For instance, a 24 x 36 jaw crusher has a opening of 24' by 36', a 56 x 56 jaw crusher has a opening of 56' square. Primary jaw crushers are typically of the square opening design, and secondary jaw crushers are of the rectangular opening design. However, there are many exceptions to this general rule.

The crushing arena is a hazardous environment. Large material and debris can jam inside the crusher, damaging components and causing costly downtime.

Importantly, manually digging out the crusher before repairs or restarts puts workers in dangerous positions. The Mine Safety and Health Administration (MSHA) has reported numerous injuries and fatalities incurred when climbing in or under the jaw to manually clear, repair or adjust the typical older-style jaw crusher.

To prevent crusher damage, downtime and difficult maintenance procedures, the hydraulic overload relief system opens the crusher when internal forces become too high, protecting the unit against costly component failure. After relief, the system automatically returns the crusher to the previous setting for continued crushing. As the professional manufacturer of complete sets of mining machinery, such as stone crushing plant, Henan Hongxing is always doing the best in products and service. vibrating screen：http://www.hx-crusher.com/vibrating_screen.html
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A Jaw Crusher reduces large size rocks or ore by placing the rock into compression. A fixed jaw, mounted in a 'V' alignment is the stationary breaking surface, while the movable jaw exerts force on the rock by forcing it against the stationary plate. The space at the bottom of the 'V' aligned jaw plates is the crusher product size gap, or the size of the crushed product from the jaw crusher. The rock remains in the jaws until it is small enough to pass through the gap at the bottom of the jaws.

Safety is a culture and should be championed by every worker in the operation. At the same time, management should respond immediately to each worker's safety concerns and successes, rather than monitoring only overall team efforts and targets. And, manufacturers should engineer greater safety as well as productivity into their units while accompanying their equipment with strong operational and safety training programs.

It has never been more important to consider the potential hazards of conventional, older-style crushers versus modern jaw crusher design. And even during today's challenging economic climate, safety should never be minimized due to a need to achieve lower prices or costs. Modern crusher design is a major development in safe material processing--one that allows operations to maximize productivity while putting safety first.

In recent years, with the gradual vigorousness of limestone powder processing industry, the number of limestone processing enterprises is also increasing. Mining equipment like stone crusher plant and ball mill are indispensable in limestone processing, so the increase of limestone processing enterprises relatively leads to the development of the mining machinery industry. The processing of limestone needs to base on fine stone crusher plant and ball mill equipment. Ball mill could produce various fineness of limestone powder according to the actual use, which meets the processing requirements of various industries.

In our country, limestone milling industry is in a period of vigorous development. With the help of great support of national policies and unremitting efforts of the enterprises, China might well become the big and powerful producer of ultrafine powder technology and products. The mining machinery enterprises should continue to research and develop the product technology, so as to make major contribution to the development of Chinese limestone milling industry.

According to the trial research of many kinds of crushers, Hongxing found out that jaw crusher has the following several significant features for limestone crushing:

a) The production capacity of jaw crusher is 600 ~ 800t / h, which is 25~40 times the capacity of the original limestone crusher. Hongxing jaw crusher has solved the problem of high operating efficiency and no maintenance time caused by low capacity for original limestone crusher. As the professional manufacturer of complete sets of mining machinery, such as cone crushers, Henan Hongxing is always doing the best in products and service. impact crusher：http://www.crusher-machine.com/2.html
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b) Jaw crusher can crush large-sized limestone, and the maximum crushing size is 1000 × 1200mm.

c) Fine final product size, only 2 ~ 15mm.

d) Good uniformity of two materials and the mixing amount of desulfurization limestone has greatly increased. The current mixing amount can reach 60%, which can effectively reduce the cost of raw materials.

e) Low power consumption. 1 ton of limestone can save 1-2KWh/t power, and the annual electricity savings will be 100,000RMB.

f) Effectively improved the labor intensity and work environment.

PE series jaw crusher of Henan Hongxing can be classified into primary and fine crushing. PE and PEX series jaw crushers are widely used for the primary and secondary crushing of various kinds of ores and rocks with the compression strength no more than 320Mpa in mining, smelting, building, highway, railway, water conservancy, chemical industry etc. With the feeding size 125mm ~ 1020mm, jaw crusher is the preferred primary crushing equipment.