JPH109158A - Chip seal in scroll fluid machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit elastic force uniformly over a volute chip seal at its upper self-lubricating member by inserting a chip seal into a seal groove to the back thereof while retaining a minute clearance between its elastic-force applying member fixed thereto and the side face of the groove. SOLUTION: Since an elastic-force applying member 8 on the lower face of a chip seal is bonded and fixed at its back face to the bottom face of recessed seal grooves with an adhesive agent, leakage blowby fluid generated in the chip seal part, which leaks from the chip-seal side face of the seal grooves (a) and (b) into the bottom face of the seal grooves, is sealed off by the bottom face thus bonded and fixed to be prevented from invading and leaking to the opposite side of the seal grooves. The elastic-force applying member 8 on the lower face of the chip seal keeps a clearance (d) at its side face and has no contact with the side face of the seal groove to transmit elastic force therethrough with no trouble caused. The member 8 thus presses a self- lubricating member 7 up at the back face thereof to cope with various motions and thus to improve the sliding sealing effect.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tip seal in a scroll fluid machine.

[0002]

2. Description of the Related Art A fixed scroll and an elastic member of a tip seal fitted to both end wrap end faces of an orbiting scroll are not fixed or fixed to a seal groove. The microfluid that invades leaks from the bottom of the groove and blows from the other side of the seal groove to the suction side, causing a reduction in discharge pressure and suction vacuum.

[0003]

In a tip seal of a scroll fluid machine, a member having an elastic force is disposed in the tip seal groove in a deep portion of the groove on the back side of the tip seal, and the elastic force is reduced. Utilizing the structure, the rear surface of the self-lubricating member located on the upper surface is pushed up to increase the sealing effect of the sliding surface. However, the tip seal has a spiral seal shape as a compression mechanism of a scroll fluid machine, and the wraps of both scrolls are fitted with the same number of turns and with a phase shift of 180 °, and the compression action is sequentially performed. In order to adopt a configuration in which a compression chamber is formed while being in contact with the other wrap wall surface, irregular pressure is applied to the side pressure receiving surface between the scroll wrap end surface and the sliding surface of the tip seal, and the tip seal is fitted into the seal groove. The tip seal that is operating will also act while swinging, and the sealing surface of the seal groove will always have a problem of leakage, and it is important to take measures to solve this leakage, especially on the top side. Stable sliding between the side plate and the mirror plate surface without swinging the lubricating member is required. For that purpose, it is necessary to stably fit the elastic force applying member on the back side of the seal groove.

[0004]

The self-lubricating additional member located on the upper surface side of the seal groove has a structure in which the expansion is added at the upper portion of the seal groove. Achieving smooth axial movement with fitting accuracy, the elastic force adding member at the back of the seal groove that pushes up the back surface has a small gap between the side surface and the seal groove, Even if it is compressed and attached to maintain the side, the side surface of the elastic force applying member does not contact the seal groove side surface,
The gist of the invention is that the back surface of the member and the bottom surface of the seal groove are completely brought into contact with each other and then bonded and fixed with an adhesive.

[0005]

As described above, the tip seal fitted in the seal groove is fitted in the inner part, and the fixed elastic force applying member is fitted with the side surface thereof maintaining a small gap. Since there is no positive mating surface where the elastic force is impeded,
A uniform elastic force can be transmitted to the upper self-lubricating member throughout the spiral tip seal. Furthermore, since it is adhered and fixed to the bottom of the seal groove, it can be completely fixed in the seal groove.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The twin scroll fluid machine of FIGS. 1 to 5 will be described as one embodiment. FIG. 1 is an overall configuration diagram of a twin-type scroll fluid machine, showing portions A and A ′ and a tip seal fitting portion. In FIG. 2, reference numeral 7 denotes a chip seal upper surface self-lubricating member, 8 denotes a chip seal lower surface elastic force applying member, 1 denotes an eccentric drive shaft, and is fitted into a two orbiting scroll. Reference numerals 3 and 4 denote left and right fixed scrolls. The 5 orbiting scroll teeth are provided with a 5a orbiting projection at the portion where the outer peripheral end of the vortex is orbited, and 6 minute gaps at which the outer peripheral end of the vortex can be orbited. A shows a chip seal portion, and FIG. 5 shows an enlarged detail of the chip seal portion. A 'indicates a two-orbiting scroll head plate and a tip seal portion on a sliding surface. However, since the structure is the same as that of FIG. 5, an enlarged detailed view is omitted. FIG. 3 shows a two orbiting scroll tip seal upper surface self-lubricating member and an eight-tip seal lower surface elastic force applying member. FIG. 4 shows a three-right fixed scroll, and FIGS.
2 shows the same two types of chip seals. FIG. 5 is an enlarged detailed view of the tip seal portion of part A.
A tip seal upper surface self-lubricating member, an 8 chip seal lower surface elasticity adding material, a indicates a fitting range of 7 members, b
Is a fitting range of eight members. “d” indicates a minute gap between the side surface of the 8-chip seal lower surface elastic force applying member and the seal groove. C indicates an adhesive surface between the back surface of the 8-chip seal lower surface elastic force applying member and the concave seal groove bottom surface.

Next, the operation will be described. Leakage fluid generated in the chip seal portions A and A 'is bonded and fixed with an adhesive between the back surface of the 8-chip seal lower surface elasticity applying member and the bottom surface of the concave seal groove. Even if it leaks and blows by to the bottom surface of the seal groove, the leaked fluid is sealed at the surface because the bottom surface is adhered and fixed, and does not enter or leak to the opposite side surface of the seal groove. 7 more
The tip seal upper surface self-lubricating member follows the oscillating movement of the two orbiting scroll and the irregular movement due to the pressurization of the compressed fluid, and it is necessary to enhance the sealing effect. The side surface has a gap d, does not contact the side surface of the seal groove, and there is no obstacle in transmitting the elastic force. Therefore, the eight members push up the back surface of the seven members, and it is possible to enhance the sliding seal effect in response to complicated movement. It should be noted that the configuration of the present invention is of course sufficiently applicable whether the tip seals 7 and 8 are individual or integrated.

[0008]

As described above, in the tip seal of the scroll fluid machine according to the present invention, the side surface of the tip seal lower surface elastic force applying member does not come into contact with the seal groove even if it is compression-mounted to maintain the elastic force. Therefore, a uniform elastic force can be transmitted over the entire vortex. Further, since the back surface of the tip seal lower surface elastic force applying member and the seal groove bottom surface are bonded and fixed, there is no fluid leakage from this surface, and not only a high sealing effect is obtained, but also the This is a useful invention in which the volumetric efficiency is improved, the overall adiabatic efficiency is improved, and driving with low power is possible.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a twin-type scroll fluid machine.

FIG. 2 is a vertical sectional view of a twin-type scroll portion having a tip seal configuration of the present invention.

FIG. 3 is a plan view of an orbiting scroll showing a tip seal configuration position of the present invention.

FIG. 4 is a plan view of a right fixed scroll showing a tip seal configuration position of the present invention.

FIG. 5 is an enlarged detailed view of an A-part tip seal portion.

[Explanation of symbols]

2 ... orbiting scroll 3 ... right fixed scroll 4 ... left fixed scroll 5 ... orbiting scroll teeth 5a ... orbiting projection 6 ... minute gap 7 ... self-lubricating member 8 for chip seal upper surface 8 ... lower surface for chip seal Elasticity applying member 9: gap between end plate and measuring plate facing scroll tooth end face a: 7-chip seal fitting, seal groove depth b: 8-chip seal fitting, seal groove depth c: 8-chip Adhesion surface between seal back surface and seal groove bottom d ..... Small gap between 8 chip seal side and seal groove side

Claims (1)

[Claims] A fixed scroll and an orbiting scroll;
The orbiting scroll is configured to revolve without rotating, and the end plates of both fixed and orbiting scrolls are provided with scroll teeth in the axial direction to form a wrap portion and a scroll on the other side. A scroll fluid machine that compresses and seals the compression chamber from the outer circumference toward the center by fitting a chip seal into the seal groove recessed in the short section on the spiral wrap end face that passes the sliding surface. In the fixed and orbiting scroll, both end wrap end faces,
A tip seal, which has substantially the same elastic force, is fitted with a tip seal, and the tip seal is used to form a sealable portion between the sliding surface and the lap end face. Formed up and down, the member located on the back side of the seal groove is a member having elasticity, constitutes a minute gap with the side surface of the seal groove, the member located on the top side is formed of a self-lubricating member, A chip seal in a scroll fluid machine, wherein a back surface of a member to which elastic force is added and a concave seal groove and a bottom surface formed on an inner side of the seal groove are adhered and fixed with an adhesive.