How to deal with the noise generated during the operation of the gear oil pump?

The gear oil pump makes a sound during operation, which may be caused by a certain reason. To address this issue, we need to investigate the possible causes one by one and take corresponding solutions. The following is a detailed explanation of the methods for handling the sound emitted during the operation of gear oil pumps:

1、 Identify the source and cause of the sound

Check for trapped oil:

The phenomenon of trapped oil is one of the common causes of noise in gear oil pumps. When gears mesh, the size of the enclosed volume will change, causing the oil to be squeezed or creating a vacuum, resulting in noise.

Solution: Process unloading grooves on the side plate of the gear pump. When the trapped oil volume changes, the unloading groove is connected to the oil discharge chamber or suction chamber to avoid the occurrence of trapped oil.

Check the oil suction pipeline and filter:

Blockage of the oil suction pipeline or filter can lead to insufficient oil suction, resulting in dry grinding and cavitation, which in turn can cause noise.

Solution: Check and clean the oil suction pipeline and filter to ensure smooth oil suction.

Check the intake air condition:

The gear oil pump will produce cavitation noise after inhaling air. Air may enter the pump body through poorly sealed areas.

Solution: Check the sealing condition of the pump body, suction pipe joint, and the joint surface between the pump body and the cover plate to determine the sealing. At the same time, check whether the oil suction pipeline is leaking and promptly eliminate the leakage phenomenon.

Check the wear of gears and bearings:

The wear of gears and bearings can cause loose fit, resulting in vibration and noise.

Solution: Regularly check the wear of gears and bearings, and replace severely worn components in a timely manner.

Check the coaxiality between the pump shaft and the motor shaft:

If the pump shaft and motor shaft are not concentric, it will cause the transmission device to vibrate more and produce noise.

Solution: Reinstall the gear oil pump with the pump shaft concentric with the motor shaft.

Check the speed and flow rate:

Excessive speed or flow rate of the gear oil pump can cause accelerated meshing vibration of the gear teeth and generate noise.

Solution: Adjust the recommended operating speed and flow rate of the gear oil pump to avoid overspeed or excessive flow operation.

2、 Take specific solutions

Supplement and replace lubricating oil:

Insufficient oil or deteriorated lubricating oil can cause poor lubrication of gears, resulting in friction noise.

Solution: Regularly check the oil level in the fuel tank and replenish lubricating oil in a timely manner. At the same time, regularly replace deteriorated lubricating oil to ensure that the quality of the lubricating oil is qualified.

Exhaust defoaming:

If there are bubbles inside the gear oil pump, it will produce cavitation noise.

Solution: Open the vent valve on the top of the pump body to remove internal air until there are no bubbles in the liquid flowing out.

Adjust assembly accuracy:

Poor assembly is also one of the reasons for the noise generated by gear oil pumps.

Solution: Adjust the assembly accuracy again, and ensure that the installation position and fit clearance of components such as gears and bearings meet the requirements.

Install muffler:

Installing a muffler at the inlet and outlet of the gear oil pump can reduce the noise during pump operation.

Solution: Select the appropriate muffler for installation based on the model and flow rate of the gear oil pump.

Increase maintenance and upkeep:

Regularly maintain the gear oil pump, including replacing vulnerable parts such as seals, bearings, gears, and cleaning the oil filter.

Solution: Develop a detailed maintenance plan and strictly follow it.

3、 Summary and Prevention

The sound emitted during the operation of the gear oil pump may be caused by specific reasons, and we need to investigate and handle it according to the specific situation. At the same time, in order to prevent similar problems from occurring, we need to increase the daily maintenance and upkeep of the gear oil pump, regularly inspect and replace vulnerable parts, and ensure the normal operation of the gear oil pump. In addition, when choosing a gear oil pump, we should also fully consider factors such as its performance parameters and usage environment, in order to meet actual needs and reduce noise generation.