High pressure pump internal leakage problem

When the high-pressure pump equipment was overhauled, we found that the outlet check valve had a leak problem, which caused serious internal leakage problems. This will have a big negative impact on the use of high pressure pumps, so what should we do? Below we will briefly introduce this issue and hope to help everyone.
 
First, let's analyze the specific reasons. During the overhaul process, we found that the outlet check valve was in working condition for a long time, causing the spool to be elliptical through the shaft hole, causing the spool to sink and frequently opening the damage under the serious seat sealing surface. Therefore, a serious endoleak problem has been formed. In addition, it may be due to defects in manufacturing or corrosion of the medium, resulting in cracks in the outer sealing portion, causing leakage of the high pressure pump.
 
So how do we solve it? In the repair process, we need to divide into two situations, one is to repair the leak. The specific measures are as follows: firstly grind the crack on the outer surface of the valve with a small electric grinder until the crack defect; then select the appropriate electrode and repair the outer surface of the welded valve by hot spot welding; then according to the inner diameter after grinding, it is equipped The seal of the high pressure pump.
 
If it is an internal leakage problem, then we need to take the following measures: 1. Grind the sealing surface of the high pressure pump seat with a small grinder to restore the circular shape; 2. Find the original valve core by four-clamp positioning on the lathe. Through the center of the shaft hole, at the same time reaming; 3, the car wears the shaft; 4, after the test, use the red Dan test to ensure its tightness.
 
For high-pressure pumps, its superior performance is inextricably linked to the help and support of the motor. In the course of use in recent years, as the needs of users continue to increase, in order to meet the needs of users, we need to upgrade the motor frequency conversion control technology of high-pressure pumps.