Tangential seal structure of vortex compressor

Abstract

The invention relates to a tangential sealing structure of a vortex compressor, which aims at reducing the tangential leakage of the vortex compressor and improving the polytropic efficiency of the vortex compressor. The inner surfaces and the outer surfaces of dynamic vortex teeth and static vortex teeth are opened with blade-shaped teeth, the positions on the blade-shaped teeth close to crests of teeth and roots of teeth are smooth walls, even if the smooth walls close to the crests of vortex teeth and roots of vortex teeth are contacted, the blade-shaped crests of teeth of the dynamic vortex teeth and static vortex teeth also have a certain clearance and cannot be scraped mutually; while a cavity among the blade-shaped teeth is closed in a labyrinth way, which can enhance the tangential sealing effect of the dynamic vortex teeth and static vortex teeth, reduce the machining precision of the crank pin and the dynamic vortex teeth and static vortex teeth as well as the assembly accuracy of the dynamic vortex bearing, thus still having comparatively reliable sealing performance at lower rotational speed and being especially applicable to the frequency conversion vortex compressor.

Description

technical field [0001] The invention relates to the sealing of the movable and static scroll teeth of a scroll compressor. Background technique [0002] At present, there are three main mechanisms for realizing the tangential sealing of the scroll compressor's movable and static scroll teeth: [0003] (1) Moving and static scroll engagement mechanism without adjustment mechanism; [0004] (2) Moving and static scroll engagement mechanism with eccentric slider or eccentric bushing; [0005] (3) The movable and static scroll engagement mechanism with elastic adjustment. [0006] The common features of these three institutions are: [0007] (1) The inner and outer surfaces of the movable and static scroll teeth are smooth surfaces without any sealing elements. Even in the most ideal meshing state, that is, when the movable and static scroll teeth are meshed on several generatrices of the scroll profile line, the The sealing surface separated by any two adjacent compression ...

AI Technical Summary

Problems solved by technology

[0007] (1) The inner and outer surfaces of the dynamic and static scroll teeth are smooth surfaces without any sealing elements. Even in the most ideal meshing state, that is, when the dynamic and static scroll teeth are engaged on several generatrices of the scroll profile line, the The sealing surface separated by any two adjacent compression chambers is only a very narrow straight line, and the sealing effect is not good

[0008] (2) Affected by the eccentricity error of the crankshaft, the clearance of the moving scroll bearing, the machining accuracy of the scroll teeth, and the deformation of the scroll teeth due to force and heat, the actual meshing lines that should be meshed at the same crankshaft angle Only some meshing lines are contact-sealed, and the rest of the meshing lines have gaps, and the tangential leakage is relatively large

[0009] (3) When the rotating speed is low, the centrifugal inertial force generated by the movable scroll and the movable scroll bearing decreases, resulting in the reduction of the tangential sealing force formed by the centrifugal inertial force and the radial gas force, or even less than zero, thus causing greater tangential leakage

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