What are the reasons why the gear oil pump does not boost the pressure?

Gear wear, broken seals, etc., causing internal leakage.

Taixing bidirectional gear pump factory is an expert in gear oil pumps.

1.Leakage inside the pump.

1) End face leakage, the gap between the gear end face and the end face thrust plate is the most important reason for the leakage of the gear pump, here is also the position that accounts for the largest proportion of leakage, the wear of the thrust plate or floating shaft sleeve may lead to aggravated leakage, affecting the displacement of the pump and the pressure.

Solution: Replace or repair thrust plates.

2) Radial leakage, radial leakage refers to the leakage between the top circle of the gear tooth and the surface of the pump cavity, and the wear of the tooth top or pump cavity is intensified, resulting in leakage.

Solution: Replace or repair gears.

3) Meshing line leakage, the entire width of the gear can not be meshed, the resulting leakage is called meshing line leakage, the tooth surface is seriously worn, resulting in aggravated leakage.

Solution: Replace or repair gears.

2.There are cracks in the pump body, causing serious leaks, which leads to insufficient pressure.

Solution: Replace the pump body.

3.The inlet filter of the pump is blocked, when the hydraulic oil is seriously polluted, the long-term operation will cause the inlet filter of the gear pump to be blocked, resulting in insufficient oil absorption, which will lead to the flow rate of the gear pump becoming smaller, the pressure decreased, and the flow and pressure required for the work cannot be achieved.

Solution: Replace the filter or clean the filter, and also check whether the cleanliness of the oil meets the requirements, and replace the oil in time if necessary.

4.The suction height of the gear pump is too high, and the suction height of the gear pump exceeds the maximum allowable suction height, resulting in insufficient suction and thus the pump pressure cannot reach the desired value.

Solution: Adjust the oil absorption height so that the actual height is less than the maximum allowable value.

5.The pressure adjustment of the system relief valve is too low, or the relief valve fails, resulting in most of the pump's flow going through the relief valve back to the oil tank, so that the system pressure cannot reach the required value.

Solution: Check that the relief valve is working properly, and if necessary, replace the relief valve or re-adjust the setpoint.

6.The viscosity of hydraulic oil is too large, when the ambient temperature is too low, it may cause the viscosity of hydraulic oil to be too low, the oil is too thick, the pump is not enough to absorb oil or the fluid resistance is too large, resulting in the system pressure not going up.

Solution: Design a heating device for the hydraulic station running at low temperature, so that the hydraulic oil can work within a reasonable temperature range.

7.The viscosity of hydraulic oil is too low, when the oil temperature is too high or the oil product is not selected properly, it may cause the viscosity of the hydraulic oil to be too low, which will aggravate the leakage, and the serious leakage will make the pump pressure unable to reach the expected working pressure.

Solution: Design a cooling device for the hydraulic station or replace the appropriate hydraulic oil, so that the hydraulic oil can work within a reasonable temperature range to ensure the normal operation of the hydraulic system.

Hello! There are several reasons for the pressure drop in the gear pump:

1. Check the relief valve, the oil temperature is low when it is just started, the viscosity is large, the pressure is high, as the temperature increases, the viscosity decreases, and the pressure also decreases, adjust the relief valve, and the problem may be solved. If the set value of the relief valve is improper, the pressure will be relieved when it reaches a certain pressure, so that the customer thinks that the pressure cannot be reached, but in fact, the set value of the relief valve is improper. When the customer selects the model, if there are special requirements for pressure, we must put forward the pressure value you require when ordering, and we can adjust the pressure relief value of the relief valve to the degree you need.

Second, thoroughly check the oil circuit where the gear oil pump is located, and check the instrument, which is very important.

3. The pressure of the gear oil pump is ultimately reflected by the head, and theoretically as long as the strength of the parts of the gear oil pump and the energy of the driving equipment are sufficient, the infusion can reach any height. However, because there is a certain gap between the gear and the pump body, the gap between the inner side of the pump casing is and the radial clearance is, so when the head is increased to a certain extent, the liquid backflow phenomenon will occur, and the head will be reduced, that is, the pressure drop. Therefore, the cause of no pressure is that the side clearance and radial clearance can be increased.

Hope it helps!

If the gear oil pump is not sucking oil, it could be due to the following reasons:

1.Oil pump inlet blockage: Check the oil pump inlet for debris or dirt, and clean up the blockage.

2.Poor seal of the oil pump: check whether the seal of the oil pump is intact, and replace the seal if it is damaged.

3.Oil pump rotor wear: Check whether the oil pump rotor is worn, and replace the rotor if it is worn.

4.Oil pump gear wear: Check whether the oil pump gear is worn, if there is wear, the gear needs to be replaced.

5.Air leakage of oil pump inlet limb pipeline: Check whether the oil pump inlet pipeline is leaking, and repair the pipeline if there is air leakage.

Solution: Take corresponding measures according to the specific situation, such as cleaning blockages, replacing seals, rotors or gears, repairing pipelines, etc. If none of the above methods can solve the problem, it is recommended to contact a professional technician for maintenance.

Regarding the landlord's concern, "What is the reason why the gear oil pump does not increase or orange?" "Here's my personal opinion:

A gear oil pump is a device that converts mechanical energy into hydraulic energy by borrowing a pair of gears that mesh with each other. It is widely used in the lubrication system of air compressors. The failure of the oil pump during operation is usually due to a decrease in the oil pressure in the lubrication system, or even sometimes no oil.

The reasons for the lack of gear oil pump are as follows:

1. The direction of rotation is opposite to the specified direction;

2. The suction pipeline is not tight, and the check valve is stuck;

3. The seal between the pump body and the pump cover of the oil pump is poor;

4. The amount of oil in the oil tank is insufficient;

5. The parts of the pump are seriously worn;

6. The oil suction filter is blocked.

In practice, different treatments should be carried out according to the specific situation. Special attention should be paid to the sealing of the suction pipe and the sealing between the pump body and the pump cover of the gear oil pump during the overhaul. If the suction end is poorly sealed, the inlet of the oil pump will leak air, causing the oil pump to be evacuated, and the oil will naturally not be oiled.

The gear pump has high reliability, long-lasting output pressure and stable spike shape, if there is a sudden pressure drop, the following aspects can be checked. Gesture.

Check from simple to difficult: 1 Is there any change in the speed of the gear pump? 2 Is there a change in the viscosity of the liquid used? 3Is the pressure gauge normal? 4 Check whether the system temperature is consistent when the pressure is used.

Gear pump causes: large gear wear, pressure relief valve problems.

If the pressure changes, you can disconnect the pressure gauge and connect a new pressure gauge to see if the pressure is normal.