Urban construction tends to be at a high level, and people's living water needs to be pressurized and promoted. As an important pressurization pump upgrade equipment, the use of more and more widely. However, the noise and vibration problems brought by it have also raised the issue of how to control and protect environmentalists. In this paper, the origin of the pump vibration analysis, and put forward several views on disposal.
First, the pump vibration causes 1. As the pump manufacturing process, but off: the rotor imbalance; pump and motor shaft is not the heart; rotor and stator part of the collision or friction;
2 due to the use of longer, pump wear and tear aging: impeller loose; bearing damage or bearing clearance large;
3. Pump inlet pipe, the impeller, the pump debris; fixed pump and the foundation is not fixed, the phenomenon of resonance to strengthen and so on;
4 water pump work to promote water flow, accompanied by eddy currents, cavitation will inevitably produce vibration;
From this we can conclude that there are many reasons why a pump generates vibrations, some of which are inevitable for several generations of vibrations. This requires that we deal with the issue of pump vibration in addition to the pump itself to enhance the manufacturing process to reduce the vibration amplitude, the pump through the installation of rubber vibration isolators, spring isolators, inertia base pump vibration has become an important method.
Second, the control of the pump vibration control:
A. install spring isolator:
a. Pump spring isolator style options:
The general use of self-standing spring shock absorber, the advantages of simple structure, low cost; spring exposed, easy to observe the spring state at any time, for the spring to be replaced ahead of schedule to avoid spring corrosion damage caused by sudden subsidence caused by the pump equipment Damage and pipeline rupture and so on.
b. Selection of springs:
General shock absorber manufacturers to choose the spring to meet the following requirements: The diameter of the spring should not be less than 0.8 times its height under the rated load; the spring must have some extra travel, vortex flowmeter at least equal to 50% of the static deflection; Spring The level of rigidity is at least 100% of the rigidity of steel to ensure the stability of shock absorber.
c. Selection of spring damper deflection;
Usually shock absorber manufacturers arch arch spring shock absorber (spring rated compression) is generally 25MM (from the frequency of about 3-4HZ), the deflection can be at 650 rpm per minute of the pump vibration. When the speed is lower than 650, it is recommended to use spring isolators with deflection below 40.
B. Install rubber vibration isolator:
The choice of rubber vibration isolator: the material is generally neoprene (CR), natural rubber (NR); generally use compression rubber shock absorber, for lighter weight pump, optional shear rubber shock absorber;
Compared with the spring shock absorber, rubber shock absorber vibration isolation performance is relatively different.
C. installation of inertia base:
In order to meet the more stringent vibration standards, the installation of inertia base, with the use of spring isolators, is undoubtedly the best choice.
The specifications of the inertia base: the weight of the base is about 1-2 times the weight of the water pump; the frame is formed by the locking of the slot iron, the height of which is not less than 1/12 of the length but not less than 150MM and not more than 300MM; Wide size should be able to cover the entire pump, and more than 10-15 cm each side is appropriate. And best to cover the bayou; watering cement, and built a layer of steel mesh at one-third of the height; installation of spring isolator base and base spacing to 3-5 cm.
Second, the vibration control effect of the pump:
Based on the condition of the pump equipment, the vibration isolation effect that can reach more than 85-99% can be achieved by the above method, so as to fundamentally solve the problem that pump vibration brings people's life and industrial production.
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