Solution to the failure of the jaw crusher bearing

The 颚-type crusher, also known as the PEX jaw crusher, is an upgraded product of the PE jaw crusher. The jaw crusher retains the advantages of PE crusher with large crushing ratio, uniform product size, simple structure, reliable performance and convenient maintenance. It is suitable for coarse and medium-sized crushing and can crush various ores with compressive strength of 2000kg/cm2. , rock materials. The jaw crusher is one of the best equipment for rough crushing in sand and gravel production lines and mining and mineral processing. Long-term high-load operation of the jaw crusher can cause failures in bearings, linings, hammers, and motors. The following is a brief introduction to the causes and countermeasures of excessive bearing temperature during the use of the jaw crusher.

The jaw crusher bearing oil is cut off or the oil is injected too much; the oil hole is blocked and the oil is not added; the flywheel wheel counterweight position is offset, the frame is beating; the bushing is axially tilted; the bearing wears or remains Damage to the frame, etc., may cause the bearing temperature of the jaw crusher to be too high. In response to the above problems, Zhengzhou Xinhai Machinery Liu engineers summarized the corresponding countermeasures: according to the specifications, quantitatively refueling on time; cleaning oil holes and oil sump plugs; adjusting the position of the flywheel counterweight; removing the bearing cap on the frame , tighten the bushing and remove the flywheel or sheave, replace the new adapter bushing; replace the bearing; replace the end cap and the sealing sleeve, or loosen the upper bearing cap of the heating end of the frame bearing housing, with the fuse and The insert cover is pressed into the bearing housing groove, and the bearing cap is fixed to eliminate the rotation of the insert cover. Users of the jaw crusher need to regularly check and repair the equipment to ensure the stable operation of the equipment.

The development and application of the 细-type fine crusher technology, as an engineering technology, is not only related to the theoretical level, science and technology, but also closely related to the 颚-type fine crusher structure, material selection, processing and manufacturing methods and manufacturing processes. Therefore, it is of great economic and practical significance to optimize the design, materials and processing technology of the jaw crusher. Zhengzhou Xinhai Machinery adheres to the development concept of science and technology development and technology strong factory. Xinhai Machinery is at the forefront of scientific and technological innovation in mining machinery industry for the transformation and replacement of sand and gravel production lines and mineral processing equipment.

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Analysis of cleaning, overhaul and damage of timken deep groove ball bearings

First of all, some equipments require TIMKEN bearings to be particularly strict with their own clearance problems. If the clearance is too large, even if it is slightly larger, it will easily wear parts of the equipment, so it is only necessary to reduce Clearance to solve this problem, but another problem has arisen, that is, if the clearance is too small, the problem of heat dissipation, if the heat is not properly, it will easily lead to an increase in internal temperature and eventually cause the bearing to overheat and burn!

Secondly, it may be an excessive load (preload is too large). The speed is too high. The play is too small. There is water or other foreign matter invading. If the above two cases are not the case, the accuracy of the shaft and the bearing housing is poor, and the deflection of the shaft is large. Seeing this, I think everyone wants to know the solution. First, we should study the lubricant and lubrication method, choose the TIMKEN deep groove ball bearing lubricant, and its dosage, and correct the bearing selection. Research is to match, bearing clearance and preload, and to improve the seal. Check the accuracy of the shaft and bearing housing. Of course, if you have an expert next to you, let him operate and learn the best!

1, the cleaning of the bearing

When disassembling the lower bearing for inspection, first record the appearance of the deep groove ball bearing, confirm the residual amount of the lubricant, and then wash the bearing after sampling the lubricant for inspection. As a cleaning agent, gasoline and kerosene are commonly used.

The cleaning of the removed bearing is divided into coarse cleaning and fine fine washing. In the container, the metal mesh bottom is placed first, so that the bearing does not directly contact the container. When rough cleaning, if the bearing is rotated with dirt, it will damage the rolling surface of the bearing and should be noted. In the rough cleaning oil, use a brush to remove the grease and the adhesive. After it is almost clean, it is transferred to the fine wash.

Fine washing is to carefully clean the deep groove ball bearing while rotating in the cleaning oil. In addition, the cleaning oil should always be kept clean.

2. Inspection and judgment of bearings

In order to judge whether the removed bearing can be reused, check the bearing after cleaning, carefully check the raceway surface, the rolling surface, the state of the mating surface, the wear of the cage, the increase of the bearing clearance and whether there is dimensional accuracy. Falling damage, abnormality. For non-separable ball bearings, use one hand to support the inner ring and rotate the outer ring to check if it is smooth.

Separate bearings such as tapered roller bearings can be inspected separately for the rolling surfaces of the rolling elements and the outer ring.

Because large bearings cannot be rotated by hand, pay attention to the appearance of rolling elements, raceways, cages, ribs, etc. The higher the importance of bearings, the more careful inspection is required.

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