Analysis of the Causes of Severe Wear of Hydraulic Pumps and Technical Improvement
Symptoms and causes of failure: In the maintenance of the following three points to find the cause of the malfunction, and the system to improve: (1) check the boom cylinder leakage situation. The easiest way is to raise the boom to see if there is a clear free fall. If the whereabouts of obvious removal of fuel tank inspection, seals have been worn should be replaced. (2) check the control valve. First cleaning valve, check valve if die wear, such wear should be replaced. If there is still no change after installation of safety valve, and then check the control valve spool wear, the gap limit of use is generally 0.06mm, severe wear and tear should be replaced. (3) Measurement of the hydraulic pump pressure. If the pressure is low, then make adjustments, the pressure is still not adjustable, the serious damage to the hydraulic pump. 1. In general, the main reason that the boom can not be lifted is: a. Hydraulic pump is severely worn. The pump leaks seriously at low speed. When the pump runs at high speed, the pump pressure slightly increases, but due to the pump wear and leakage, the volumetric efficiency drops significantly and it is difficult to reach the rated pressure. Hydraulic pump work for a long time has exacerbated the wear and tear, oil temperature, resulting in wear and tear of hydraulic components and seals aging, damage, loss of sealing ability, hydraulic oil deterioration, and finally lead to failure. b. hydraulic components selection is not reasonable. Boom cylinder specifications for 70/40 non-standard series, the seals are also non-standard parts, high manufacturing costs and seal replacement inconvenience. Boom cylinder bore is small, the system is bound to set high pressure. c. Hydraulic system design is not reasonable. As can be seen from Figure 1, the control valve and full hydraulic steering gear for a single pump in series, safety valve setting pressure points 16MPa, while the hydraulic pump rated working pressure is also 16MPa. Hydraulic pump often at full load or prolonged overload (high pressure) work, and the system has a hydraulic impact, long-term oil does not change, the hydraulic oil contaminated, exacerbating the hydraulic pump wear and tear, resulting in hydraulic pump shell burst (was found Such failure). Improvements and effects (l) Improve hydraulic system design. After several demonstrations, the final use of advanced priority valve and load sensing hydraulic steering gear form, the new system can follow the steering requirements, give priority to the distribution of traffic, regardless of the size of the load, the steering wheel speed can ensure adequate oil supply, the remaining part Can all be supplied to the working device circuit, thereby eliminating the power loss caused by excessive oil supply to the steering circuit, improving the system efficiency and reducing the working pressure of the hydraulic pump. (2) Optimize the design of boom cylinder and hydraulic pump to reduce the pressure of system work. Through optimization calculation, the boom cylinder adopts standard series 80/4. Hydraulic pump displacement increased from 10ml / r to 14ml / r, the system set pressure of 14MPa, to meet the boom cylinder lifting force and speed requirements. (3) Pay attention to proper use and maintenance of loaders in the process of using, regularly add or replace hydraulic oil, maintain the cleanliness of hydraulic oil, and strengthen routine inspection and maintenance. Carbide Pellets,Cemented Carbide Pellets,Tungsten Carbide Pellets,Tungsten Carbide Alloy Pellet Luoyang Golden Egret Geotools Co., Ltd , https://www.xtcwelding.com
Tungsten carbide pellets are small, cylindrical or spherical shapes made from tungsten carbide, a hard and dense material. These pellets are typically used in various industrial applications, such as drilling, grinding, cutting, and wear-resistant components.
Tungsten carbide is a compound of tungsten and carbon, known for its high hardness, strength, and resistance to wear and corrosion. It is often used as a cutting tool material, as well as in the production of mining and drilling equipment.
The pellets are usually produced through a process called powder metallurgy, where Tungsten Carbide Powder is mixed with a binder material and then compacted under high pressure. The compacted pellets are then sintered at high temperatures to form a solid and durable product.
Tungsten carbide pellets are used in various industries, including mining, construction, oil and gas, and manufacturing. They are commonly used as inserts in drilling bits, cutting tools, and wear-resistant parts, providing high performance and extended tool life.
Overall, tungsten carbide pellets are essential components in many industrial applications, offering superior hardness, strength, and wear resistance.