Analyze The Misunderstanding Of Repairing Rotary Vane Vacuum Pump

When it is found that the vacuum pump is faulty, some maintenance mistakes should be avoided. The following editors of vacuum supermarkets will analyze the misunderstandings of the rotary vane vacuum pump for you.

1. The tighter the moving ring seal, the better:

Actually, the tight tightening of the moving ring seal is harmful. One is to increase the wear between the sealing ring and the shaft sleeve and leak prematurely; the second is to increase the resistance of the axial adjustment and movement of the moving ring, and it cannot be adjusted when the operating conditions change frequently; the third is that the tension spring is too tired and easily damaged The fourth is to deform the moving ring sealing ring and affect the sealing effect.

2. The new one is better than the old one:

Relatively speaking, the effect of using the new mechanical seal on the rotary vane vacuum pump is better than the old one, but the quality of the new mechanical seal or the selection of raw materials is improper, and the large scale error of cooperation will affect the sealing effect; If there is no excessive wear on the ring, it is better not to replace it. Because the static ring stays in the static ring seat for a long time, the polymer and impurities are deposited as a whole, and a good sealing effect is achieved.

3. Demolition is better than not:

Once the mechanical seal leaks, it is eager to dismantle and repair. In fact, sometimes the seal is not damaged. Just adjust the working conditions or adjust the seal to eliminate the leak. In this way, it can prevent spoilage and verify its own fault judgment ability, stacking repair experience to improve the quality of overhaul.

4. The tighter the static ring seal, the better:

If the static ring sealing ring is in a stopped state, the tighter sealing effect will be better, but too tight is also harmful. One is that the static ring seal is excessively deformed, which affects the sealing effect of the rotary vane vacuum pump; the second is that the raw material of the static ring is mostly graphite, which is generally brittle, and excessive force is very likely to cause cracking; the third is that the device is difficult to disassemble and is easily damaged. Static ring.

5. The tighter the impeller lock, the better:

Rotary vane vacuum pump mechanical seal leakage, leakage between the bushing and the shaft (leakage between the shafts) is relatively common. Generally, Cayman Electromechanical Technology believes that the leakage between the shafts is that the impeller lock is not locked. In fact, there are many factors that lead to the leakage between the shafts, such as the failure of the inter-shaft pad, offset, impurities in the shaft, and the cooperation between the shaft and the shaft sleeve. Larger shape and position errors, damage to the contact surface, gaps between various parts on the shaft, and excessively long shaft head threads will cause leakage between the shafts. Excessive locking of the lock nut will only lead to premature failure of the inter-shaft pad. On the contrary, moderate locking of the closing nut will keep the inter-shaft pad always have a certain contraction elasticity. During operation, the lock nut will actively lock the shaft and keep the shaft between Outstanding sealing condition.

6. The greater the spring compression, the better the sealing effect of the rotary vane vacuum pump:

Actually, otherwise, the excessive compression of the spring can cause the friction pair to wear rapidly and burn instantly; excessive tightening makes the tension spring lose its ability to adjust the end face of the moving ring, resulting in seal failure.