Pit wear in hydraulic motor maintenance refers to fatigue damage of hydraulic components. The components of the hydraulic motor will generate alternating load in the process of rotation and reciprocating motion. Due to periodic compression and deformation, residual stress and metal fatigue will occur, resulting in small cracks on the surface of the components, which will continue to develop and slowly cause small pieces of peeling off on the surface of the parts; The peeled metal chips will stay in the middle of the relatively moving friction pair and wear the surface of the element, which is called pit wear.
The cavitation abrasion of hydraulic motor is caused by; The aging of the oil inlet pipe, the damage and deformation of the joint and the loosening of the joint caused by vibration, and the negative pressure of the oil inlet pipe, so there is a certain amount of air mixed in the oil inlet pipe, which is the premise for the cavitation phenomenon of the hydraulic motor. As the components in the air are foreign air, nitrogen and a certain amount of water, a certain amount of water will be generated under the action of high pressure of the hydraulic oil. At the same time, the rapid release of compressed air from the high-pressure area to the low-pressure area will produce local high temperature, and the high-temperature acid corrosion ability is particularly strong. Therefore, under the corrosion of local high-temperature acid, the surface of hydraulic components will show fan-shaped traces in the direction of high pressure to low pressure, Such marks are called cavitation marks.
In reality, there are many cases of hydraulic motor maintenance caused by pit wear and cavitation. Many customers will not take care of the maintenance of hydraulic motor after use. The phenomenon caused by this kind of situation is that the hydraulic motor is repaired once every three days and overhauled once every five days. Both customers and businesses will be bored with this phenomenon. Customers will think that the quality of the hydraulic motor is a problem, and complain that the product quality of the manufacturer is not up to standard. However, the merchant thinks that the use of the hydraulic motor by the customer is not standardized, which leads to frequent maintenance of the hydraulic motor, which is like an outsider. In fact, we usually only need to spend a little time to effectively control this phenomenon. Whether for customers or businesses, it is beneficial to know the maintenance knowledge of hydraulic pump. A large part of the service life of the hydraulic motor depends on the customer's usual maintenance of the hydraulic motor. It is necessary to know how to conduct regular maintenance on the hydraulic motor, so as to ensure that the hydraulic motor will not fall off at the critical moment.
