CN2184804Y

CN2184804Y - Vortex disk sealing structure

Info

Publication number: CN2184804Y
Application number: CN 93235426
Authority: CN
Inventors: 乔宗亮; 熊则男; 徐博
Original assignee: Xian Jiaotong University
Current assignee: Xian Jiaotong University
Priority date: 1993-12-27
Filing date: 1993-12-27
Publication date: 1994-12-07
Anticipated expiration: 2003-12-27

Abstract

The utility model discloses a vortex disk sealing structure in the technical field of vortex machines. The utility model is characterized in that the vortex body tops of a fixed vortex disk and a movable vortex disk are processed with small grooves which are limited into respective vortex body tops and are not communicated on both ends of a vortex body. The small grooves are 0.3 mm to 3 mm in depth. The ratio of the width of the small grooves and an axial clearance is more than 10. The utility model improves the sealing performance of vortex compressors, reduces radial leakage and can be used for the technical field of vortex machines.

Description

Vortex disk sealing structure

The utility model belongs to the scroll machine technical field, further belongs to a kind of scroll sealing configuration.

The leakage of scroll compressor is the principal element that influences the scroll compressor volumetric efficiency.At present, reduce the following two kinds of approach that mainly contain that leak: one, rely on the raising machining accuracy to guarantee that leakage-gap is as far as possible little between two vortex bodyes, reduce the purpose of leaking thereby reach.Two, as shown in Figure 1, lay filler 9 in the groove 7 on the vortex body 5 of quiet whirlpool dish 1, lay filler 10 in the groove 8 on the vortex body 6 of movable orbiting scroll 2 and rely on the applying of the applying of fillers 9 and the upper bottom surface 4 of movable orbiting scroll 2 and filler 10 and the bottom surface 3 of quiet whirlpool dish 1, stop the radial leakage passage, realize reducing the purpose of leaking.First type shortcoming at first is to improve machining accuracy can increase processing cost, secondly is that the leakage-gap value can't ad infinitum reduce owing to the restriction of processing conditions and manufacturing process.Second type of shortcoming is that filler contacts with the tight of scroll, strengthened the friction between surface of contact, and then increased power consumption, and next is subjected to the influence of working medium and operating conditions, and the elastic filler body deforms easily and destroys, its sealing effect failure.Therefore its sealability and durability are difficult to guarantee.In addition, prepared filler and corresponding grooves and assembling can increase the product cost of scroll machine.

The purpose of this utility model is by process throttling groove on the vortex body of scroll compressor, to strengthen sealability, reduces to leak.

The utility model is achieved in that the vortex body top at quiet whirlpool dish and movable orbiting scroll is processed with the throttling sulculus of the involute-type that is parallel to two involute walls respectively.Here sulculus all is limited in separately the vortex body end face, and requires not connect at the two ends of vortex body, and sulculus bar number is unrestricted in the wall thickness allowed band, and little groove depth is 0.3～3mm, and the ratio of sulculus width b and axial clearance δ is greater than 10.Expand so that run into the sulculus chamber in the process of gas leakage, the each expansion reduced pressure, and volume increases.Because by each cell unit time leakage rate is identical, so when volume increases, just require bigger flow velocity by the long-pending gap that equates of section, promptly require to have bigger pressure reduction, so just, make the pressure of each cell fall increasing, cause gas unimpededly not leak, therefore reach the purpose of sealing.

Accompanying drawing 1 is traditional usefulness gland sealed scroll structural representation.

Accompanying drawing 2 is plan views of the quiet whirlpool dish after improving.

Accompanying drawing 3 is plan views of the movable orbiting scroll after improving.

Accompanying drawing 4 is to improve the quiet movable orbiting scroll mesh schematic representation in back.

Accompanying drawing 5 is the partial enlarged drawings in A district among Fig. 4.

As Fig. 2-shown in Figure 4, be parallel to the involute sulculus 11 of two involute walls in the top processing of the vortex body 5 of quiet whirlpool dish 1; The involute sulculus 12 that is parallel to two involute walls in the processing of the top of the vortex body of movable orbiting scroll 2.Here

sulculus

11 and 12 all is limited in separately the vortex body end face, does not connect at the two ends of vortex body.Sulculus bar number is unrestricted in the scope that the vortex body wall thickness allows, and its degree of depth is 0.3～3mm, requires to satisfy b/ δ＞10 between sulculus width b and axial clearance δ.So just as shown in Figure 5, when the passage in the end face 14 of gas by vortex body and the gap of the bottom surface 3 of fixed scroll leaks, in leakage process, run into cell 12 gases and expand, form foregoing throttling sealing.When gas leaked with the clearance channel of the bottom surface 4 of movable orbiting scroll 2 by vortex body 5, situation was also like this.

The sectional shape of throttling groove also can be processed as other shapes except being processed as rectangle groove, as isosceles triangle, right-angled triangle etc.

By at vortex body top processing throttling groove, can strengthen the sealability of scroll compressor, reduce its radial leakage, to compare with the clearance seal situation, its leakage rate can reduce 20-30%.Therefore this technology can increase the volumetric efficiency of scroll compressor, and then the overall efficiency of scroll machine is improved.Also can cut down finished cost simultaneously.

Claims

1, a kind of scroll sealing configuration, comprise quiet whirlpool dish (1) and movable orbiting scroll (2), it is characterized in that: the top processing of coiling the vortex body (5) of (1) in quiet whirlpool is parallel to the involute sulculus (11) of two involute walls, the involute sulculus (12) that is parallel to two involute walls in the processing of the top of the vortex body (6) of movable orbiting scroll (2), sulculus (11) and sulculus (12) all are limited in separately the vortex end face, two ends at vortex body do not connect, the bar number of sulculus is unrestricted in the scope that the vortex body wall thickness allows, the degree of depth of sulculus is 0.3～3mm, and the relation between sulculus width b and the axial clearance δ satisfies b/ δ＞10.