Operation, usage, and response methods of Roots pump

1、

Preparation before starting

1. Check the lubricating oil inside the gearbox and end cover A, and the oil level should reach the middle position of the sight glass.

. The oil cup of the extended shaft seal is often filled with lubricating oil and must be kept clean. The oil should be changed after 30-50 hours of use of a new pump, and it can be determined whether to change the oil according to the usage situation in the future

2. If the inhaled gas contains dust or other metal powder, a dust or filtering device should be installed in front of the air inlet. If the inhaled gas is corrosive, use intermediate measures

3. Check for any looseness in the pump components

4. Inch the motor and check if the direction of the motor rotation is consistent with the arrow on the pump. 5. Check if the cooling water is connected. (Small Roots pump without cooling water)

Starting steps

1. Connect the power and start the front stage pump (start the front stage pump according to the requirements in the user manual of the front stage pump)

2. Open the intake valve of the Roots pump

3. Start the Roots pump

4. The pump should run smoothly and there should be no collision or impact sound from the rotor

5. There should be no leakage at the shaft seal of the pump

6. During the operation of the LC Roots pump, if the local temperature rises too much, the current reading suddenly changes, or irregular noise or other abnormal phenomena occur, the pump should be stopped immediately to check the cause

Stop pump steps

1. First, close the intake valve connected to the system.

2. Stop the pump. (Close the exhaust valve of the Roots pump)

3. Stop the front stage pump

II. Countermeasures for Roots Pump Cavitation

Once cavitation occurs, it will seriously affect the service life and effectiveness of the vacuum pump. Therefore, when cavitation problems are found in the vacuum pump, timely maintenance should be carried out to avoid aggravating the cavitation situation and causing the vacuum pump to be unusable.

. So how should we solve the problem of vacuum pump cavitation? Let's take a look at the solution together

1. Reduce the temperature of the working fluid of the equipment to prevent cavitation

2. Lowering the intake temperature can indirectly lower the temperature of the water circulation liquid, prevent cavitation, improve the drying speed of materials, and improve equipment utilization

3. When cavitation occurs in the Roots pump, the main damage is pitting on the impeller and pump casing surface when the bubbles rupture

4. From the causes of cavitation in the Roots pump, it can be inferred that a working fluid with low saturated steam pressure can be replaced (which requires good fluidity and compatibility with the extracted gas to reduce cavitation and improve vacuum degree). One drawback of this approach is the problem of post-treatment of working fluid pollution, so the practice of replacing working fluid is rarely used.

Therefore, when you find that the Roots pump has been cavitation, do not panic. You can use the corresponding solutions above to handle it, and pay attention to whether your operating method is correct to avoid incorrect operations that may lead to solution failure and even more serious cavitation problems. After dealing with the problem, you can...

Carry out relevant maintenance work to avoid secondary cavitation problems.