Stainless steel gear pump classification and fault explanation

Stainless steel pumps, as the name suggests, are stainless steel pumps. The stainless steel pump of Chunda Industrial Pump Factory of Botou City, Hebei Province includes: KCB all stainless steel gear pump, stainless steel arc heat preservation gear pump, YCB stainless steel arc pump, 2CY stainless steel gear pump, NYP stainless steel high viscosity pump, RY stainless steel heat transfer oil pump Wait.

KCB series stainless steel gear pump This series of gear pump mainly consists of gears, shaft, pump body, safety valve, shaft end seal and other components. The gear has high hardness and strength after heat treatment, and is installed together with the shaft in the replaceable bushing. Operation; lubrication of all parts in the pump is automatically achieved when the pump is working with the conveying medium. KCB series stainless steel gear pumps are used in places with high sanitary requirements, such as medicine and food industries; in places with weak corrosiveness, such as fine chemicals, cosmetics, printing and dyeing, brewing.

First, the cause of the failure:

(1) The hydraulic oil tank is too low;

(2) The hydraulic oil is not used according to the season;

(3) The oil inlet pipe is seriously blocked by dirt;

(4) The gear pump oil seal of the gear pump is damaged, and the air enters the hydraulic system;

(5) The “O”-shaped seal ring of the gear pump inlet and outlet port joints or bent joints is damaged. The fastening bolts of the bent joints or the inlet and outlet oil pipes are not tightened, and the air enters the hydraulic system;

(6) The internal leakage of the gear pump and the sealing ring aging;

(7) The end face of the gear pump or the end faces of the main and driven gear bushings are worn or scratched, and the unevenness of the end faces of the two bushings is excessive;

(8) Internal leakage caused by incorrect assembly of internal parts of the gear pump;

(9) "Left-spin" installed "right-handed" oil pump, causing damage to the skeleton oil seal;

(10) The hydraulic oil is dirty.

Second, the elimination method:

(1) Add or replace the oil that meets the required grade according to the season to the specified oil level. Remove the foreign matter in the oil pipe and tighten the bolt or nut at the joint;

(2) Replace the aging or damaged skeleton oil seal or "O" sealant ring;

(3) Replace the worn gear oil pump or oil pump bushing, and smooth the end face on the flat plate when the wear is slight. The unevenness of the unevenness is 0.03mm; the end face of the upper bushing is lower than the upper plane of the pump body (normal value is less than 2.5~2.6mm). If it is out of tolerance, it should be compensated by adding 0.1~0.2mm copper piece to the lower bushing. Should be placed on the rear bushing;

(4) The unloading plate and the sealing ring must be installed in the oil inlet cavity, and the two bushings can be balanced. The relief gasket should have a preload of 0.5mm;

(5) The guiding wire elastic force should be able to twist the upper and lower bushings at a slight angle to the rotating direction of the driven gear at the same time, so that the processing planes of the two bushings of the main and driven gears are closely fitted;

(6) The unloading groove on the sleeve must be installed on the side of the low pressure chamber to eliminate the harmful dead volume when the gear meshes;

(7) Before pressing the self-tightening oil seal, it should be coated with a layer of lubricating oil on the surface, and also pay attention to the oil-resistant edge toward the front cover, which cannot be reversed;

(8) The "right-handed" pump cannot be installed on the "left-handed" machine, otherwise it will damage the skeleton oil seal;

(9) Before loading the pump cover, pour a small amount of oil into the pump casing and turn the meshing gear by hand;

(10) Before installing the oil pump cover without tightening the bolt, check whether the gap between the pump cover and the pump body is between 0.3 and 0.6 mm. If the clearance is too small, replace the large seal ring and the pressure relief member. After the hydraulic oil pump is installed, it should be flexible and free from sticking.

The stainless steel gear pump is suitable for conveying non-lubricating, corrosive, hygienic conditions requiring high viscosity and high viscosity fluids without solid particles, fibers and the like. The medium temperature is -20-80 ° C and the viscosity is 5-5000 cst. Used in machinery, petroleum, chemical, food, pharmaceutical, metallurgy, printing and dyeing, brewing, cosmetics, beverages and other industries. The power transmission gear and the fluid delivery gear are in different pump chambers. They are designed and manufactured according to their different functions, so the pump has higher reliability. Based on the FXA stainless steel gear pump type, FXB adds a primary support, increases working pressure, and is designed as a flange joint. The pump is available in both mechanical and packing seals.