CN2235516Y - Automatic compensating gap type ladder like vortex disc - Google Patents

Abstract

The utility model relates to a ladder-shaped vortex disc for automatically compensating gaps. Primarily, rectangular teeth on the cross sections of involute type vortex lines on a stator and a rotor are change into ladder-shaped teeth. The ladder-shaped vortex disc for automatically compensating gaps can automatically compensate axial gas and radial gaps and can efficiently reduce axial leakage and radial leakage and can improve the work efficiency. The utility model has the advantages of simple structure, easy fabrication, low prepare cost and high mechanical strength, being suitable for vortex compressors generally.

Description

The trapezoidal scroll of automatic compensation gap

The utility model relates to a kind of scroll of scroll compressor, belongs to the rotating machinery field.

The scroll of scroll compressor is made up of vortex shape stator and vortex shape rotor, the cross section of the gradually open form vortex filament of stator faces and rotor end-face is a rectangular teeth, the axis of two vortex filament is apart from equating to be e, curve shape identical but have 180 the degree phase differences, during work, rotor and stator are meshing with each other and are that radius is done translation around stator with the eccentric distance e, the swept volume of vortex periphery is moved to vortex center gradually, gas or liquid and other medium be drawn into from the vortex periphery be compressed the swept volume and move to the center thereupon, the relief opening in the middle of the vortex is discharged and is finished a press cycles at last.But, make to produce axial clearance between the end face of rotor and stator and cause axial leakage owing to the relation and the medium in the swept volume of accuracy of manufacturing is compressed the effect that produces reaction force; Simultaneously, because of eccentric distance e is definite value and accuracy of manufacturing and uses reasons such as wearing and tearing, generation radial clearance between the flank of two vortex filament point of contact and cause radial leakage influences the proper functioning of compressor.In order to solve axial clearance, can adopt the method for introducing gas gas pressure to be acted on the back side of rotor, can form automatic adjusting diminishes axial clearance and keeps axial seal, but concerning gap radially, be difficult to keep minimum clearance,, after using wearing and tearing, can't compensate simultaneously because it is bigger to improve the difficulty of machining accuracy, so it will be very difficult requiring radial seal.

The purpose of this utility model is in order to overcome above-mentioned deficiency of the prior art, designs a kind of simple in structurely, easily manufactured, can also can compensate the trapezoidal scroll of the automatic compensation gap of radial clearance in compensating axial clearance effectively.

Technology of the present utility model arranges that to revolve be on the basis of existing scroll compressor, changes the cross section of the gradually open form vortex filament of scroll stator faces and rotor end-face into stepped tooth by rectangular teeth, and the angle of thread of this stepped tooth gets final product for the 0.3--5 degree.During work, act on the back side of rotor when introducing gas, and the pressure of this gas is during greater than the reaction force of swept volume medium, just rotor is pressed to stator, the axial clearance between the both ends of the surface is diminished, simultaneously, because the cross section of tooth is trapezoidal, so the side of tooth is the narrow inclined-plane of the wide crown of tooth root,, thereby realized in compensating axial clearance, also compensating the purpose of radial clearance in the gap smaller that when rotor is pressed towards stator, also can make between the flank.

The utlity model has simple in structure, easily manufactured and simultaneously can to axially and radial clearance advantage such as compensate automatically, can reduce axial and radial leakage effectively, increase work efficiency.And owing to can further improve the contact precision of flank and tooth top by mutual break-in, so also can suitably reduce requirement, make processing cost lower, again because of changing rectangular teeth into stepped tooth to precision, also can increase mechanical strength, suitable scroll compressor generally uses.

Accompanying drawing is a structural representation of the present utility model.

Referring to accompanying drawing, this trapezoidal scroll is made up of stator 1 and rotor 4, and the cross section of the gradually open form vortex filament of rotor end-face is a ladder type tooth 2, and the cross section of the gradually open form vortex filament of stator faces is a ladder type tooth 3, ladder type tooth 2 and 3 angle of thread are advisable with the 0.3--5 degree, and its best angle is between the 0.5--1 degree.The wheelbase of two vortex filament is e, and during work, rotor 4 is that radius is done translation around stator 1 with the eccentric distance e.When the pressure of introducing gas acted on the back side of rotor 4, rotor 4 was pressed towards stator 1, makes between the both ends of the surface and the gap smaller between the flank of two vortex filament point of contact, has realized the purpose of automatic compensation gap.

Claims (2)

1. the ladder type scroll of an automatic compensation gap is made up of vortex shape stator and vortex shape rotor, it is characterized in that the cross section of the gradually open form vortex filament of stator faces and rotor end-face is a stepped tooth, and the angle of thread of this stepped tooth is the 0.3--5 degree.

2. the ladder type scroll of automatic compensation gap according to claim 1, the best angle that it is characterized in that the angle of thread of ladder type tooth is the 0.5--1 degree.

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