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What is the appropriate distance between the Roots blower impeller and the casing?
Release time:
2021-01-12
There should be an appropriate distance between multiple components of the Roots blower so that they can operate with each other. Take the impeller and the casing of the blower as an example.
There should be an appropriate distance between the various components of the Roots blower for them to operate with each other. For example, if the distance between the impeller and the casing is too close, it may cause scraping, but if the distance is too large, that is also not acceptable.
There will be a certain gap between the impeller and the impeller, the impeller and the wall plate, and the impeller and the casing. This gap will have fixed standards and tolerances, and if the tolerance is too large, other corresponding failure issues may arise. When the impeller passes through the exhaust port, under the pressure in front of the pipeline, some gas leaks to the outside through the gap, which is called internal leakage.
The Roots blower maintains an appropriate gap between the two impellers and between the impeller and the casing and the end wall plates, allowing the blower to operate normally. If the gap is too large, the gas leakage will be significant, leading to a decline in the performance of the Roots blower. Conversely, if the gap is too small, the thermal expansion sizes of the casing and the impeller will differ, causing equipment accidents during operation, including explosions. Therefore, everyone must pay attention to the gap between the rotor and the casing.
The gap of the Roots blower includes the radial gap △ between the rotor and the casing, the axial gaps △1 and △2 between the rotor and the front and rear wall plates (△1 is the power input end, and △2 is the drive gear end), as well as the gaps △R1 and △R2 between the outer surfaces of the two rotors (when viewed from the blower's outlet, only the upper part of the automatic rotor is visible; if the upper part of the active rotor is not visible, then only the upper part of the active rotor is seen, which is R2). The quality of the bearings is the primary condition for ensuring that the gaps of the rotors can be maintained in their original state. The lifespan of the bearings largely depends on whether the sealing effect of the external sealing device of the bearings is good, which is a basic condition for determining the integrity of the bearings.
There is still a lot of knowledge we need to understand for the operation of the equipment. If you are interested, you can continue to follow the Mingfeng website!
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