Fault factors, solutions, and maintenance of petrochemical stainless steel gear pumps

1、 The failure factors and solutions of stainless steel gear pumps

The design of stainless steel gear pumps also considers the lubrication of bearings and the performance of other components during operation. The use of a separate bearing and pump chamber external lubrication structure has changed the traditional structure of using conveying media to lubricate bearings in the original gear pump, and improved the transmission accuracy of the main components.

. The delivery temperature of gear pumps is generally between 20 ℃ and 180 ℃, and the structure can reach up to 250 ℃

Solution to stainless steel gear oil pump failure

1: The power transmission gear and fluid delivery gear are located in different pump chambers, and they are designed and manufactured according to their respective functions, so the pump has high performance.

On the basis of the pump type, support is added to increase the working pressure, and it is designed as a flange connection. There are two forms of gear pump mechanical seal and packing sealThe leakage of water or air in the stainless steel gear oil pump pipeline may also be due to improper installation of screw caps. If there is a leak in the pump connection, you can tighten the nut by hand. In severe cases, it needs to be disassembled and reassembled. The reasons for the severe vibration of the pump are combined with the imbalance of the electric rotor or poor coupling, wear and bending of bearings, loosening of rotating parts, and unstable support of broken pipelines. Measures such as adjustment, repair, reinforcement, straightening, and replacement can be taken separately

2. Daily Maintenance of Arc Gear Oil Pump

1. Check for any looseness in the pipeline and joints of the arc gear oil pump.

. Rotate the circular gear pump by hand to see if it is flexible2. Add bearing lubricating oil to the bearing body and observe that the oil level should be at the centerline of the oil mark. The lubricating oil should be replaced or replenished in a timely manner3. Unscrew the water inlet plug of the gear pump body and inject water (or slurry)4. Close the gate valve, outlet pressure gauge, and vacuum gauge of the water outlet pipeline5. Inch the motor and check if the direction of rotation is correct6. Start the motor, and when the circular arc gear pump is running normally, open the outlet pressure gauge and vacuum pump according to their appropriate pressure, gradually open the gate valve, and check the motor load condition7. Try to control the flow rate and head of the circular arc gear pump within the range indicated on the label, and operate the circular arc gear pump at the rated point to achieve significant energy-saving effectsDuring the operation of the circular arc gear pump, the bearing temperature should not exceed the ambient temperature of 35C, and the high temperature should not exceed 80CIf any abnormal sound is found in the circular arc gear pump, it should be stopped immediately to check the causeWhen stopping the use of the circular arc gear pump, first close the gate valve and pressure gauge, and then stop the motorWithin one month of operation, the circular arc gear pump needs to change the lubricating oil after 100 hours, and then every 500 hours12. Regularly adjust the packing gland to ensure that the leakage inside the packing chamber is normal (preferably in drops)13. Regularly check the wear of the shaft sleeve, and replace it promptly if there is significant wear14. When using the circular gear pump in the cold winter season, after parking, it is necessary to unscrew the drain plug at the bottom of the pump body to drain the medium completely. Prevent frost cracking15. If the circular arc gear pump is not used for a long time, it is necessary to dismantle all the pumps, dry the water, apply grease to the rotating parts and joints, and properly store them