Solutions to water pump vibration and causes of vibration

1. The cause of the vibration is that the water pump manufacturing process is unqualified: the motor rotor is unbalanced; the concentricity between the pump and the motor shaft is insufficient; the motor rotor and part of the motor stator are impacted or rubbed;

2. After long-term use, the water pump wears and brittles, the impeller becomes loose, the bearing is damaged or the bearing gap is large;

3. There is dirt in the water pump channel tube, centrifugal impeller, and pump; resonance phenomenon occurs, etc.;

4. When the water pump is working, it will push the flowing water to create a vortex, which will inevitably cause vibration;

How to improve water pump vibration and control noise transmission

Install a spring damper on the water pump:

① Selection of spring shock absorbers (water pump spring shock absorbers): Generally, Jinnuo JB type or ZTA type spring shock absorbers are used. The advantage is that the outer shell is made of high-strength aluminum alloy die-casting, with a light and strong appearance, easy to install, and a smooth surface Painting or spraying process, the spring material is 60Si2Mn high-quality spring steel, which has the advantages of fatigue resistance, high strength, long service life, etc. Long-term use of inferior spring shock absorbers will cause the water pump to continue to settle, causing the machinery, equipment and pipelines to break, etc. phenomenon.

② Selection of springs: When selecting springs for Jinnuo shock absorbers, consider the following points: the diameter of the spring is greater than 0.8 times the height of the pressure to the rated deflection; the amount of pressure when the spring is pressed is greater than 50% of the rated deflection. to ensure the reliability of the shock absorber.

③ Selection of the deflection value of the spring shock absorber; the rated deflection value (spring rated value shrinkage) of the water pump spring shock absorber mentioned by the Jinnuo shock absorber manufacturer is generally 25MM (self-frequency value is about 3-4HZ). This deflection The value corresponds to the water pump vibration damping at 1450 rpm. When the rotational speed ratio is less than 650, it is recommended to use a spring isolator with a deflection value of 50 or even 75.

Installation base of water pump (water pump shock absorber base):

In order to meet more serious and detailed vibration control standards, it is undoubtedly a good choice to use spring shock absorbers when modifying the Sui sex base.

Specifications of Suixing base: The weight of the base is about 1.5-2 times the weight of the water pump; it is composed of channel steel, cement, steel bars and wire mesh. Its height is not less than 1/12 of the length, but not less than 150MM, and the width should be It is advisable to include all water pumps and leave 10-15 cm on each side. And the best situation is to include the bay head; pour concrete inside, and embed a layer of steel mesh at one-third of the height.

Dampers include spring dampers, water pump dampers, rubber dampers, centrifugal fan dampers, central air conditioning dampers, damping springs, etc., which are commonly used in water pumps, centrifugal fans, refrigeration units, diesel engines and other machinery The basic shock absorption of equipment and various coil fans, fresh air units, ventilation ducts, etc. are used for lifting shock absorption.