CN202149028U

CN202149028U - Scroll compressor

Info

Publication number: CN202149028U
Application number: CN201120266873U
Authority: CN
Inventors: 黄志刚; 刘飞飞
Original assignee: Anhui Meizhi Compressor Co Ltd
Current assignee: Anhui Meizhi Compressor Co Ltd
Priority date: 2011-07-27
Filing date: 2011-07-27
Publication date: 2012-02-22
Anticipated expiration: 2021-07-27

Abstract

The utility model relates to a scroll compressor. A cross coupling is arranged between a first vortex piece and a second vortex piece, is used for connecting the first vortex piece with the second vortex piece, and slides in a sliding cavity formed between the first vortex piece and the second vortex piece; a first pair of keys are arranged on the upper end face of the cross coupling; a pair of key grooves matched with the first pair of keys are arranged on a first end plate of the first vortex piece; a second pair of keys are arranged on the lower end face of the cross coupling; and a pair of key grooves matched with the second pair of keys are arranged on a second end plate of the second vortex piece. According to the technical scheme, with the adoption of the shape of the cross coupling and the positions of the keys arranged on the cross coupling, the first vortex piece and the second vortex piece can be directly connected and are effectively prevented from being rotated relatively, meanwhile, the interference of the cross coupling, a backpressure cavity and an upper support is completely avoided; and under the condition that the external diameter of the compressor is not increased, the sealing area of the backpressure cavity can be effectively expanded, and the running range of the compressor is expanded.

Description

Scroll compressor

Technical field

The utility model relates to a kind of scroll compressor.

Background technique

Existing volution type machine adopts a bent axle usually, does orbiting (being revolution motion) to drive second scroll with respect to first scroll.In order to prevent the relative movement between first, second scroll, generally adopt Oldham's coupling.These Oldham's couplings take various forms, but generally all have two pairs of keys, and every pair of key stretches out from a ring part along identical or opposite direction, and wherein pair of keys matches with the keyway of first scroll or upward support, and pair of keys cooperates with second scroll in addition.

Existing technology, the main body sliding scale of Oldham's coupling is located between second scroll and the last support, is provided with like this to prevent the relative movement between first, second scroll effectively.In the scroll compressor that adopts the unsteady technology of second scroll, the back pressure chamber structure of sealing generally is set at the second scroll dorsal part, through introducing high pressure or intermediate pressure gas muscle power, reach the unsteady purpose of second scroll.But in the time of many, design needs to enlarge the area of back pressure cavity for reason such as strengthen range of operation or raise the efficiency.This kind situation certainly will cause second scroll and Oldham's coupling to become big, and then causes that the complete machine size becomes big, finally causes the increase of cost of material and manufacture cost.

Summary of the invention

The purpose of the utility model provides a kind of scroll compressor, and this compressor can be realized the expansion of the effective back pressure chamber area of second scroll under the situation that does not enlarge the compressor external diameter, thereby the range of operation of expansion compressor improves compressor efficiency simultaneously.

For realizing above-mentioned purpose, the utility model has adopted following technological scheme: comprise compressor housing, support is installed in the compressor housing; On support and be provided with back pressure chamber; Also comprise first, second scroll, first scroll comprise first end plate and from first end plate outwardly directed first scrollwork, second scroll comprises second end plate and outwardly directed second scrollwork from second end plate; First, second scrollwork formation compression chamber that is engaged with each other; Described first scroll is fixed in the compressor housing, and rotating being arranged on of described second scroll supported, and also comprises live axle; One end of live axle links to each other with second scroll and does revolution motion to drive second scroll with respect to first scroll; The other end of live axle links to each other with motor, is provided with the Oldham's coupling that connects both between described first, second scroll, slides in the sliding cavity that Oldham's coupling forms between first, second scroll; The upper-end surface of Oldham's coupling is provided with pair of keys; First end plate of first scroll is provided with the first pair of keyway that matches with pair of keys, and the lower end surface of Oldham's coupling is provided with second pair of key, and second end plate of second scroll is provided with the second pair of keyway that matches with second key.

Second pair of keyway of the utility model is blind groove, and described second end plate is a plane with the end face that second scrollwork deviates from mutually.

The sliding cavity of the utility model is between first end plate and second end plate, and Oldham's coupling moves therein.

The opening direction of second pair of keyway of the utility model points to first scroll.

Can know by technique scheme; The shape of the utility model Oldham's coupling with and the position of the key that go up to be provided with first, second scroll is directly linked to each other, also prevented both relatively rotating simultaneously effectively, guarantee therebetween reliably accurately rotating position; Through the keyway opening mode of second scroll and the placement of Oldham's coupling; Can avoid the interference of Oldham's coupling and back pressure cavity and last support fully, first pair of keyway of the pair of keys on the Oldham's coupling and first scroll is slidingly fitted, and second pair of keyway on the second pair of key and second scroll is slidingly fitted; Oldham's coupling slides between first, second scroll; Do not increase by second scroll and said on support under the prerequisite of diameter, satisfy the designing requirement of effective back pressure chamber enlarged areas, improved the working efficiency of compressor.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the plan view of the utility model first scroll;

Fig. 3 is the A-A sectional view of Fig. 2;

Fig. 4 is the plan view of the utility model second scroll;

Fig. 5 is the B-B sectional view of Fig. 4;

Fig. 6 is the plan view of the utility model Oldham's coupling;

Fig. 7 is the C-C sectional view of Fig. 6;

Fig. 8 is the schematic perspective view of the utility model Oldham's coupling;

Fig. 9 is the utility model first scroll, second scroll, Oldham's coupling and goes up the assembling schematic representation that supports;

Embodiment

Below in conjunction with accompanying drawing the utility model is further specified:

Like Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, a kind of scroll compressor shown in Figure 9, comprise compressor housing 10, be equipped with in the compressor housing 10 and support 11, on support 11 and be provided with back pressure cavity 12; Also comprise first,

second scroll

20,30; First scroll 20 comprises first end plate 21 and outwardly directed first scrollwork 22 from first end plate 21; Second scroll 30 comprises second end plate 31 and outwardly directed second scrollwork 32 from second end plate 31; First,

second scrollwork

22,32 is engaged with each other and forms compression chamber 40, the first scroll 20 and be fixed in the compressor housing 10 second scroll, 30 rotating being arranged in the support 11; Also comprise live axle 50, an end of live axle 50 links to each other with second scroll 30 and does revolution motion to drive second scroll 30 with respect to first scroll 20, and the other end of live axle 50 links to each other with motor.

Like Fig. 1, shown in Figure 9; First, second scroll 20, be provided with the Oldham's coupling 70 that connects both between 30; Oldham's coupling 70 slides in the sliding cavity 80 of first, second scroll 20, formation between 30; Like Fig. 6, Fig. 7, shown in Figure 8, Oldham's coupling 70 integral body in the form of a ring, the upper-end surface of Oldham's coupling 70 is provided with pair of keys 71; First end plate 21 of first scroll is provided with first pair of keyway, 23, the pair of keys 71 that match with pair of keys 71 and matches with first pair of keyway 23 to prevent relatively rotating between the Oldham's coupling 70 and first scroll 20; The lower end surface of Oldham's coupling 70 is provided with second pair of key 72; Second end plate 31 of second scroll is provided with the second pair of keyway 33 that matches with second pair of key 72; Second pair of key 72 matches with second pair of keyway 33 to prevent relatively rotating between the Oldham's coupling 70 and second scroll 30, and described second pair of keyway 33 is positioned at the place that dodges of back pressure cavity 12.

The utility model is set to blind groove with second pair of keyway 33; In other words be exactly the thickness of the keyway degree of depth of second pair of keyway 33 less than second end plate 31; And opening direction points to first scroll 20; Be exactly that second pair of keyway 33 is arranged on that end face that second end plate 31 is provided with second scrollwork 32 specifically, and second end plate 31 is a plane with the end face that second scrollwork 32 deviates from mutually.Second pair of keyway 33 is provided with the cecutiency groove; Be in order to make second scroll 30 when relative first scroll 20 is done revolution motion; Second scroll 30 can guarantee all the time that with the end face that back pressure cavity 12 fits back pressure cavity 12 is a closed chamber, does not promptly receive second pair of keyway 33 position effects.

The utility model is set directly at sliding cavity 80 on first end plate 21 of first scroll 20; Promptly on first end plate 21, be provided with one in order to hold the toroidal cavity of Oldham's coupling 70; The advantage that is provided with like this has been to avoid fully Oldham's coupling 70 and back pressure cavity 12 and the upward interference of support 11; Accomplish under the situation that does not influence the compressor external diameter, reach the effect that realizes sealing.Through the setting of this blind groove, can accomplish not increase by second scroll with on support under the situation of external diameter, the area of back pressure cavity better is set, improve the range of operation of compressor.Simultaneously; Sliding cavity 80 is set directly on first scroll 20, and the cross coupling drive directly cooperates with first, second scroll, can effectively increase the accuracy of mesh of first,

second scroll

20,30; Reduce the leakage of pressurized gas; Reduce friction power loss, the deadweight that has also alleviated first scroll 20 simultaneously helps to reduce friction.

The beneficial effect of the utility model is:

1, Oldham's coupling is placed between the one the second scroll, helps reducing the compressor overall dimensions; 2, second scroll is through the mode of this half-open keyway, on support the back pressure cavity offered and the keyway of second scroll is not interfered, can enlarge the area of the back pressure cavity of compressor, be applicable to the compressor operating of various different operating modes;

3, Oldham's coupling is placed between the one the second scroll; Avoid Oldham's coupling and back pressure cavity fully and gone up the interference of supporting; Accomplish under the situation that does not influence the compressor external diameter, back pressure cavity to be set better, make that second scroll can be under the active force effect of back pressure cavity; Better to float, realize the better sealing of the one the second scroll;

4, under the situation that reduces the second scroll external diameter, do not influence back pressure cavity through half-open keyway setting, do not influence sealing effect;

5, Oldham's coupling only need be done the fine finishing processing at the keyway slip surface, and all the other positions do not need fine finishing, reduce cost; Oldham's coupling is through rationally being provided with the implementation efficiency maximization.

Above-described embodiment describes the preferred implementation of the utility model; Be not that scope to the utility model limits; Under the prerequisite that does not break away from the utility model design spirit; Various distortion and improvement that those of ordinary skills make the technological scheme of the utility model all should fall in the definite protection domain of the utility model claims.

Claims

1. scroll compressor; Comprise compressor housing (10); Support (11) is installed in the compressor housing (10); Last support (11) is provided with back pressure cavity (12); Also comprise first, second scroll (20,30), first scroll (20) comprises first end plate (21) and goes up outwardly directed first scrollwork (22) from first end plate (21) that second scroll (30) comprises second end plate (31) and goes up outwardly directed second scrollwork (32) from second end plate (31); First, second scrollwork (22,32) is engaged with each other and forms compression chamber (40); Described first scroll (20) is fixed in the compressor housing (10), and described second scroll (30) is rotating to be arranged in the support (11), also comprises live axle (50); One end of live axle (50) links to each other with second scroll (30) and does revolution motion to drive second scroll (30) with respect to first scroll (20); The other end of live axle (50) links to each other with motor, is provided with the Oldham's coupling (70) that connects both between described first, second scroll (20,30), and it is characterized in that: Oldham's coupling (70) is positioned at first, second scroll (20,30) formed sliding cavities (80); Oldham's coupling (70) integral body in the form of a ring; The upper-end surface of Oldham's coupling (70) is provided with pair of keys (71), and the end plate of first scroll (21) is provided with the first pair of keyway (23) that matches with pair of keys (71), and the lower end surface of Oldham's coupling (70) is provided with second pair of key (72); The end plate of second scroll (31) is provided with the second pair of keyway (33) that matches with second pair of key (72), and wherein keyway (33) is positioned at the place that dodges of back pressure cavity (12).

2. scroll compressor according to claim 1 is characterized in that: described second pair of keyway (33) is blind groove, and described second end plate (31) is a plane with the end face that second scrollwork (32) deviates from mutually.

3. scroll compressor according to claim 1 is characterized in that: described sliding cavity (80) is arranged between first end plate (21) and second end plate (31), and Oldham's coupling (70) slides in this sliding cavity (80).

4. scroll compressor according to claim 1 is characterized in that: the opening direction of second pair of keyway (33) points to first scroll (20).