For the actuator of air compressor equipment, a very low speed is often required, such as moving a few millimeters or even less than 1mm per minute or rotating a few revolutions per minute. At this time, there is often obvious uneven speed, intermittent time-sharing, moving and stopping, fast and slow, and jumping and stopping. This phenomenon of the air compressor becomes crawling, and similar problems will occur during the operation of the air compressor, which belongs to the problem of low-speed stability.
For the air compressor, crawling will cause great harm to it, so it should be eliminated. But it is also crawling, and its fault phenomenon is different: crawling regularly; Regular crawling; Some crawl irregularly and have large amplitude; Some crawling occurs at low speeds.
How to understand the crawling phenomenon of air compressor
The reasons for the crawling of these different phenomena of air compressor have different emphases: some are mainly due to mechanical reasons, some are mainly due to air pressure, some are mainly due to the entry of air into oil, and some are mainly due to poor lubrication. Maintenance personnel shall constantly summarize and quickly find out the causes of crawling and eliminate them.
In order to effectively solve the crawling problem of air compressor, it is necessary to solve the friction state of moving parts and the balance of machine motion. There are many reasons for these problems, such as poor accuracy of the guide rail and serious distortion of the guide rail surface; There are rust spots on the guide rail surface; The insert strip of the guide rail pressing plate is adjusted too tightly, and the dynamic and static friction coefficients of the guide rail pair materials are greatly different; Poor scraping and grinding of guide rail, insufficient points and uneven points; The oil groove on the guide rail is not good, the depth is too shallow, it has been worn off during operation, the oil groove is uneven, the length of the oil groove is too short, etc.
In addition to the guide rail of the air compressor not meeting the requirements, there are also problems with the air compressor cylinder on the machine, such as the axis line of the air compressor cylinder is not parallel to the guide rail; The arrest section in the cylinder block hole is rusted and strained; Poor accuracy of air cylinder bore, piston rod and piston; Poor installation accuracy of air cylinder, poor coaxiality of piston, piston rod, cylinder block hole and cylinder head hole, etc.
It can be seen that in order to fundamentally avoid the crawling of the air compressor, the design, manufacture and installation of the guide rail and air compressor cylinder of the geotextile must be carried out in strict accordance with the standards, and the maintenance and repair of the machine must be done in the later use process.