Submersible sewage pump quality test

Submersible sewage pump is a kind of tool specially used for sewage interception and plugging, which is often seen in our daily life. This device is a professional tool, so you need to do some testing work to ensure that no safety hazards can be put into use. For the safe use of submersible sewage pumps, quality testing must be carried out. Let's see how the quality testing is carried out.

1. Submersible sewage pump balance test

The impeller and the motor rotor are all rotating parts, and all need to do the balance test. The test equipment of the balance test is a balance machine, and the balance amount and balance position are generally displayed by the computer. For the device of <=37kw, the imbalance between the impeller and the outer diameter of the rotor is specified to be <=3g. The test should be done several times, and the cycle is repeated until it is satisfied.

2. Submersible sewage pump pressure test

For the motor stator windings that were subjected to the withstand voltage test for the first time, the effective value of the test electric power was 1760 V, which lasted 1 min. When the voltage withstand test is performed, the effective value of the voltage should not exceed 144v, and it takes 1min to require no breakdown.

3. Submersible sewage pump airtight test

Because it is submerged into the water during operation, the motor is required to be completely sealed, and no water can leak into it. If it is tested, a gas tight test is required. The airtight test is divided into two parts: the test of the pressure-bearing parts and the test of the whole machine. Parts (such as the casing, bearing housing, etc.) are processed, the inner cavity is closed and immersed in the water tank, and the air pressure test is performed with the test air hole. The test pressure is 1.5 working pressure (but not less than 0.2Mpa), which lasts for 5 minutes. No bubbles are produced. The airtight test of the components is mainly to check the sealing performance of the parts, whether there are casting blisters, cracks, shrinkage holes, etc. on the surface.

Airtight test of the whole machine: The test method is the same as the part test. The test pressure is 0.2Mpa, which lasts for 5 minutes, and no bubble is required. The main equipment of the airtight test is an air compressor, so a pressurized gas is generated.

Submersible sewage pumps usually have to perform these three tests before use. The balance test tests the balance between the impeller and the motor rotor. The pressure test is mainly to test the stator winding of the motor to meet the pressure requirement range. The airtight test can ensure that it will not be leaked into the machine when it is working. After these tests, it can basically Make sure it is working properly.

I made such a brief and detailed introduction. Do you understand how to operate it? In fact, no matter what kind of equipment we use every day, we should pay attention to the safety of use. The mortar pump, submerged pump and magnetic pump produced by our factory will carry out safety test before leaving the factory.