Common Faults and Troubleshooting Methods of Hot Oil Pumps

I. Fault of Insufficient or No Flow in Hot Oil Pumps

Common Faults:

First, inspect the suction pipeline to check if there is blockage. Impurities or sediments in the oil may adhere to the inner wall of the pipeline, narrowing the flow channel cross-section and affecting the oil suction volume. Meanwhile, confirm whether there is air leakage in the suction pipeline. Air entering the pipeline will damage the vacuum environment inside the pump, resulting in the failure of normal oil suction.

Second, check the internal components of the pump body to see if the impeller is damaged or worn. As the core component for oil transmission, a damaged impeller will directly affect the oil delivery efficiency. In addition, check the gap between the impeller and the pump casing. If the gap is too large, part of the oil will flow back through the gap, leading to a reduction in the actual output flow.

Troubleshooting Methods:

If the pipeline is blocked, it is necessary to disassemble the suction pipeline, remove internal impurities and sediments, and restore the smooth flow of the pipeline. If there is air leakage, inspect the sealing condition at the pipeline interface, replace aging sealing gaskets or fasten connecting parts to prevent air from entering.

If the impeller is damaged or worn, a new impeller should be replaced. If the gap between the impeller and the pump casing is too large, adjust the gap to a reasonable range or replace relevant components to ensure the gap meets the requirements.

II. Fault of Abnormal Noise and Vibration in Hot Oil Pumps

Common Faults:

From the installation perspective, if the coaxiality deviation between the hot oil pump and the motor is large, additional radial force will be generated during operation, causing the equipment to vibrate accompanied by noise. In addition, if the equipment base is not fixed firmly, looseness of the base during operation will also cause vibration and noise.

From the perspective of component status, bearing wear or damage is one of the important causes. As a key part supporting rotating components, worn bearings will lead to a decrease in rotation accuracy and generate irregular vibration and noise. In addition, foreign objects entering the pump, such as metal chips and large impurities, will collide and rub against rotating components, resulting in obvious abnormal noise and vibration.

Troubleshooting Methods:

First, inspect the equipment installation condition, readjust the coaxiality of the hot oil pump and the motor to ensure the axes of the two are aligned. At the same time, check the base fixing bolts and tighten the loose bolts to enhance the stability of the equipment.

If there is a bearing problem, disassemble the bearing for inspection. If the wear is severe or the bearing is damaged, replace it with a new one in a timely manner and add an appropriate amount of lubricating oil as required.

If there are foreign objects in the pump, stop the machine, disassemble the pump body, remove the internal foreign objects, check whether the components are damaged due to the collision of foreign objects, and replace the damaged components if necessary.

III. Fault of Seal Leakage in Hot Oil Pumps

Common Faults:

Leakage not only causes oil waste but also may pose safety hazards.

Aging of sealing components: Sealing gaskets, sealing rings, and other components that are in a high-temperature environment for a long time are prone to aging phenomena such as hardening and cracking, thus losing their sealing effect.

Second, wear of the sealing surface is also a common cause. During long-term operation, the sealing surface is rubbed by impurities in the oil, or the sealing surface is subjected to uneven force during installation, which will cause the sealing surface to be uneven and lead to leakage.

In addition, loosening of the seal gland results in insufficient pressure between the sealing components, which will also cause oil leakage.

Troubleshooting Methods:

When dealing with the seal leakage fault, it is necessary to first determine the leakage location and cause.

If the sealing components are aged, replace them with new sealing gaskets or sealing rings, and select temperature-resistant sealing parts that match the working conditions of the hot oil pump.

If the sealing surface is worn, slight wear can be repaired by grinding; if the wear is severe, the components related to the sealing surface need to be replaced.

If the seal gland is loose, tighten the gland bolts according to the specified torque to ensure that the sealing components are closely fitted to achieve the sealing effect.

Summary

Hot oil pump faults will affect production efficiency and safety, so timely inspection and handling are crucial. TEFFIKO has in-depth experience in the pump industry and conducts in-depth research on the fault characteristics of hot oil pumps. The fault inspection and troubleshooting solutions it provides are professional and reliable, helping to solve problems quickly. At the same time, the hot oil pump products of TEFFIKO are of high quality, which can reduce the occurrence of faults from the source. If you have any needs, please contact us, and we will be at your service at any time.