JP6596787B2 - Scroll compressor - Google Patents

Description

  The present invention relates to a scroll compressor.

  The scroll compressor includes a main shaft that is rotationally driven by an electric motor and an engine, an eccentric shaft that is offset from the main shaft, and a swivel that is rotatably supported by the eccentric shaft in a metal housing. It has a scroll and a fixed scroll facing the orbiting scroll. The orbiting scroll revolves around the axis of the main shaft, i.e., orbits without rotation. Thereby, the volume of the compression chamber formed between the fixed scroll and the orbiting scroll is changed, and the fluid guided into the compression chamber is compressed.

The housing of the scroll compressor has at least a two-part structure, and the orbiting scroll and the main shaft are accommodated in one housing, and the fixed scroll is integrally fixed to the other housing. These two housings are connected to each other by bolts or the like.
When such a scroll compressor is provided in a vehicle, for example, water may be applied to the scroll compressor when the vehicle is traveling.

Patent Document 1 proposes a configuration in which a gasket (first gasket) is sandwiched between mating surfaces of housings in order to prevent water and the like from entering the housing. The gasket is sandwiched between and closely attached to the mating surfaces of the housings, thereby preventing water and the like from entering the mating surfaces of the housings.
Furthermore, Patent Document 1 discloses a configuration in which a gasket (second gasket) is provided between the orbiting scroll and the housing.

Japanese Patent Laid-Open No. 2015-21386

However, in the configuration in which the gasket is sandwiched between the mating surfaces of the housings, the gasket (first gasket) is crushed between the housings when the bolts are tightened when the housings are joined. On the other hand, since the gasket (second gasket) provided in the housing is not affected by the fastening force of the bolt, it is not crushed according to the tightening of the bolt. As a result, the gaskets between the housings and the thicknesses of the housing and the orbiting scroll are different.
Then, the clearance along the axial direction of the main shaft (hereinafter referred to as chip clearance) between the orbiting scroll provided in one housing and the fixed scroll fixed to the other housing is narrowed.

  An object of this invention is to provide the scroll compressor which can manage a chip clearance appropriately.

The present invention employs the following means in order to solve the above problems.
According to the first aspect of the present invention, the scroll compressor includes a housing portion having a first housing and a second housing coupled to face each other, and is accommodated in the housing portion, and is fixed to the first housing. The fixed scroll, and a compression part provided with a revolving scroll provided in the second housing so as to be revolved with respect to the fixed scroll, and sandwiched between the first housing and the second housing , A first gasket that seals the inside and outside of the housing, the coupling bolt that passes through the first gasket and couples the first housing and the second housing, and between the first housing and the fixed scroll sandwiched, and a second gasket which separates the high pressure side and low pressure side of the compressor unit, through said second gasket, the Comprising a fixing bolt for coupling the fixed scroll as one housing.

  According to such a configuration, the first gasket is sandwiched between the first housing and the second housing coupled to each other, and the second gasket is coupled to the first housing and the fixed scroll coupled to each other by the coupling member. It is sandwiched between. Thereby, even if it couple | bonds a 1st housing and a 2nd housing and a 1st housing and a fixed scroll, respectively, a 1st gasket and a 2nd gasket can be maintained to the equivalent thickness. Thus, even if the first gasket and the second housing are joined and the first gasket is crushed, the second gasket can be crushed in the same manner. The tip clearance between the fixed scroll and the orbiting scroll can be prevented from being affected.

  The scroll compressor may further include a scroll position fixing portion that directly contacts the first housing and the fixed scroll in a direction in which the first housing and the fixed scroll face each other.

  According to such a configuration, in the scroll position fixing portion, the first housing and the fixed scroll directly abut against each other, so that the positional relationship between the first housing and the fixed scroll in the opposing direction is restricted. Thereby, the position of the fixed scroll can be more reliably fixed, and the tip clearance can be properly maintained.

  In the scroll compressor, the first gasket and the second gasket may be formed of the same gasket material.

  According to such a structure, the dispersion | variation in the thickness of a 1st gasket and a 2nd gasket can be suppressed.

  According to the scroll compressor according to the present invention, it is possible to appropriately manage the tip clearance.

It is sectional drawing which shows the structure of the scroll compressor which concerns on 1st embodiment of this invention. It is sectional drawing which shows the structure of the scroll compressor which concerns on 2nd embodiment of this invention.

Hereinafter, a scroll compressor according to an embodiment of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a cross-sectional view showing a configuration of a scroll compressor according to a first embodiment of the present invention.
As shown in FIG. 1, the scroll compressor 1 </ b> A of this embodiment includes a housing part 10 that forms the outer shape of the apparatus, and a compression part 30 provided in the housing part 10. Such a scroll compressor 1A is formed in the housing part 10 by compressing the working fluid introduced into the housing part 10 from the suction part (not shown) formed in the housing part 10 into a high-pressure state by compressing the working fluid. The discharged part (not shown) discharges to the outside. The working fluid compressed in this way is used as a refrigerant in, for example, an air conditioner. Hereinafter, the configuration of each unit will be described in detail.

The housing part 10 includes a housing body (second housing) 11 and a lid (first housing) 12.
The housing body 11 includes a scroll housing portion 11 c and a shaft housing portion 11 s that houses the drive shaft 33. An opening 13 is formed at the end 11a of the housing body 11 on the scroll accommodating portion 11c side. A shaft insertion hole 11h communicating with the shaft housing portion 11s is formed in the end portion 11b of the housing body 11 on the shaft housing portion 11s side.

The lid 12 is provided so as to close the opening 13 of the housing body 11.
A mating surface 12f that is continuous in the circumferential direction on the outer peripheral surface of the inner side surface 12a is formed on the inner side surface 12a of the lid body 12 on the side facing the housing main body 11. The mating surface 12f extends from the outer peripheral portion of the inner side surface 12a to the housing main body 11 side, and faces the mating surface 11f continuous in the circumferential direction on the outer peripheral side of the opening 13 of the housing main body 11.

  Further, a support portion (scroll position fixing portion) 14 that is continuous in the circumferential direction is formed on the inner peripheral side of the mating surface 12 f of the lid 12 so as to protrude radially inward of the lid 12.

  On the inner peripheral side of the support portion 14 of the lid body 12, a cylindrical fixed scroll support portion 18 that protrudes from the inner side surface 12 a to the fixed scroll 31 side is formed at an interval in the radial direction of the lid body 12. . Bolt insertion holes 18h are formed in the fixed scroll support portion 18 at a plurality of locations spaced in the circumferential direction. The bolt insertion hole 18h is formed by communicating the inner side surface 12a of the lid 12 and the outer side surface 12b on the opposite side, and a fixing bolt (coupling member) 19 for fixing the fixed scroll 31 to the lid 12 is inserted. Is done.

  The housing body 11 and the lid body 12 are provided with a plurality of flange portions 15 and 16 projecting outward on the outer peripheral side of the opening portion 13 at intervals in the circumferential direction of the opening portion 13 (in FIG. 1). Shows only two flange portions 15 and 16). A female screw hole 15 h is formed in the flange portion 15 of the housing body 11, and a bolt insertion hole 16 h is formed in the flange portion 16 of the lid body 12 at a position communicating with each other.

  The housing main body 11 and the lid body 12 have a plurality of coupling bolts 21 in a state where the circumferentially continuous mating surfaces 11f and 12f and the flange portions 15 and 16 provided at a plurality of locations in the circumferential direction face each other. Are combined. Each coupling bolt 21 is inserted from the lid 12 side into the bolt insertion hole 16 h of each flange portion 16, and the tip end portion thereof is screwed into the female screw hole 15 h of the flange portion 15 of the housing body 11 and fastened.

  The compression unit 30 includes a fixed scroll 31 fixed to the lid body 12, a turning scroll 32 provided so as to be able to revolve with respect to the fixed scroll 31 in the housing body 11, and a drive shaft 33.

  The fixed scroll 31 has a disk-shaped end plate 34 and a fixed wrap 35 erected in a direction orthogonal to a surface 34 f on one side of the end plate 34.

  A through hole 34h is formed in the center of the end plate 34 so as to penetrate the surface 34f on one side and the surface 34g on the other side. Also, female screw holes 34n are formed in the surface 34g of the end plate 34 at a plurality of locations spaced in the circumferential direction.

  The fixed wrap 35 is a wall formed in a spiral shape when viewed from the side facing the surface 34 f of the end plate 34. As an example, the fixed wrap 35 is preferably configured to form an involute curve centered on the center position of the end plate 34.

  In such a fixed scroll 31, the surface 34g of the end plate 34 is opposed to the support 12 and the fixed scroll support 18 formed on the cover 12 by a plurality of fixing bolts 19 to the cover 12. Fixed. Each fixing bolt 19 is inserted from the outer surface 12b side of the lid 12 into a bolt insertion hole 18h formed in the fixed scroll support portion 18, and the tip thereof is screwed into a female screw hole 34n formed in the end plate 34. It is concluded by that.

  A discharge as a high-pressure space S2 is discharged between the surface 34g of the fixed scroll 31 provided in this way and the inner side surface 12a of the lid 12 and the high-pressure working fluid compressed by the compression unit 30 is discharged. A chamber T is formed.

  The orbiting scroll 32 has a disk-shaped end plate 41 and a spiral orbiting wrap 42 provided on a surface 41 f of the end plate 41 on the side facing the fixed scroll 31.

  In the end plate 41, a shaft support hole 41h is formed on a surface 41g opposite to the surface 41f on which the turning wrap 42 is provided.

  The swirl wrap 42 is a wall formed in a spiral shape when viewed from the side facing the surface 41 f of the end plate 41. The swirl wrap 42 is preferably configured to form an involute curve centered on the central portion of the end plate 41.

The fixed wrap 35 and the orbiting wrap 42 are accommodated in the scroll accommodating portion 11c of the housing body 11 in a state where the fixed wrap 35 and the orbiting wrap 42 are engaged with each other.
A compression chamber A for compressing the working fluid is formed between the end plate 34 and the fixed wrap 35 of the fixed scroll 31 and the end plate 41 and the rotary wrap 42 of the orbiting scroll 32.

  The drive shaft 33 is rotatably supported around its central axis C by a pair of bearings 43 and 44 provided in the shaft accommodating portion 11 s of the housing body 11. One end 33 a of the drive shaft 33 protrudes from the shaft insertion hole 11 h formed in the housing body 11 to the outside of the housing part 10. The drive shaft 33 is rotationally driven around the central axis C by connecting an external motor, an engine, or the like to one end 33a of the drive shaft 33.

  A seal member 45 is provided between the bearing 43 and the bearing 44 to block between the inner peripheral surface of the shaft housing portion 11 s of the housing body 11 and the outer peripheral surface of the drive shaft 33.

An eccentric shaft 46 having an eccentric shaft Ch at a position offset laterally from the central axis C of the drive shaft 33 is provided at the other end 33 b of the drive shaft 33 so as to protrude toward the orbiting scroll 32. The eccentric shaft 46 is rotatably connected to a shaft support hole 41 h formed in the end plate 41 of the orbiting scroll 32 via a bearing 47.
When the drive shaft 33 is driven to rotate about the central axis C, the eccentric shaft 46 turns along a circumferential path with the central axis C as the center and an offset dimension of the eccentric shaft Ch from the central axis C as a radius. Then, the orbiting scroll 32 revolves around the central axis C together with the eccentric shaft 46.

  In addition, a balancer 48 is provided between the drive shaft 33 and the orbiting scroll 32 in order to eliminate the unbalance caused by the orbiting scroll 32 that orbits eccentrically with respect to the central axis C of the drive shaft 33.

  In such a compressing unit 30, when the orbiting scroll 32 is revolved by the drive shaft 33, it is introduced into the housing unit 10 from a suction unit (not shown) formed in the housing unit 10. The working fluid is sucked into the compression chamber A from the low pressure space (low pressure side) S1 on the outer peripheral side of the fixed scroll 31 and the orbiting scroll 32 in the housing portion 10. The working fluid is compressed as it moves to the inner peripheral side in the compression chamber A. The compressed working fluid passes through the discharge chamber T which is a high-pressure space (high-pressure side) S2 from a through-hole 34h formed in the center portion of the end plate 34 of the fixed scroll 31, and is a discharge unit formed in the housing unit 10. It is discharged from the outside (not shown).

  Here, a first gasket 50 and a second gasket 51A are sandwiched between the lid 12, the housing body 11, and the fixed scroll 31 in the scroll compressor 1A.

The first gasket 50 has an annular shape that is continuous in the circumferential direction on the outer peripheral side of the opening 13 of the housing body 11. And the front end surface 15 f of the flange portion 15. The first gasket 50 prevents water and the like from entering the housing part 10 from the outside and leakage of the working fluid from the inside of the housing part 10 to the outside.
The first gasket 50 is sandwiched between the front end surface 16f of the flange portion 16 and the front end surface 15f of the flange portion 15 so that the fastening force of the coupling bolt 21 that connects the lid body 12 and the housing body 11 ( Axial force) acts.

The second gasket 51 </ b> A is sandwiched between the front end surface 18 f of the fixed scroll support 18 and the surface 34 g of the end plate 34 of the fixed scroll 31. The second gasket 51A seals and partitions between the low pressure space S1 on the outer peripheral side of the fixed scroll 31 and the orbiting scroll 32 and the discharge chamber T which is the high pressure space S2.
The second gasket 51 </ b> A is clamped between the front end surface 18 f of the fixed scroll support 18 and the surface 34 g of the end plate 34, thereby fastening the fixing bolt 19 that fixes the fixed scroll 31 to the lid body 12 ( Axial force) acts.

Here, the first gasket 50 and the second gasket 51A are formed of the same plate-shaped gasket material. As a result, the first gasket 50 and the second gasket 51A can have the same thickness while suppressing variations in thickness during manufacturing.
The first gasket 50 and the second gasket 51A are arranged in the same plane.

  Further, on the outer peripheral side of the second gasket 51 </ b> A, the front end surface 14 f of the support portion 14 of the lid 12 and the convex portion 34 s formed on the outer peripheral portion of the end plate 34 of the fixed scroll 31 directly abut. The convex portion 34 s is continuous along the outer peripheral portion of the end plate 34, and has a rib shape protruding toward the lid 12 with respect to the surface 34 g of the end plate 34.

According to the scroll compressor 1A having the above-described configuration, the first gasket 50 is sandwiched between the lid body 12 and the housing body 11 that are coupled to each other, and the second gasket 51A is coupled to each other by the fixing bolt 19. It is sandwiched between the lid body 12 and the fixed scroll 31. Thereby, even if the cover body 12 and the housing main body 11, and the cover body 12 and the fixed scroll 31 are respectively connected, the first gasket 50 and the second gasket 51A can be crushed in the same manner and can be maintained at the same thickness. Thus, even if the lid 12 and the housing body 11 are joined and the first gasket 50 is crushed, the second gasket 51A can be crushed in the same manner, so that the first gasket 50 and the second gasket 51A are crushed. It is possible to suppress variation in the tip clearance, which is the distance between the fixed scroll 31 and the orbiting scroll 32 in the direction of the central axis C of the drive shaft 33, depending on the difference in condition. In this way, it is possible to properly manage the tip clearance in the scroll compressor 1A.
In addition, by using the second gasket 51A, it is possible to ensure high sealing performance between the high-pressure space S1 on the high-pressure side and the low-pressure space S2 on the low-pressure side even when compared with an O-ring or the like.

  Moreover, in the support part 14, the positional relationship in the direction which the cover body 12 and the fixed scroll 31 mutually oppose is restrained because the cover body 12 and the fixed scroll 31 contact | abut directly. Thereby, the position of the fixed scroll 31 can be more reliably fixed. Thereby, the chip clearance in the scroll compressor 1A can be properly managed.

  Furthermore, by forming the first gasket 50 and the second gasket 51A from the same gasket material, the first gasket 50 and the second gasket 51A can be easily made to have the same thickness. Thereby, the chip clearance in the scroll compressor 1A can be managed more easily.

(Second embodiment)
Next, a second embodiment of the scroll compressor according to the present invention will be described. In the second embodiment described below, since only the structure of the seal structure between the lid 12 and the fixed scroll 31 is different from the scroll compressor 1A of the first embodiment, the same part as the first embodiment Are denoted by the same reference numerals, and redundant description is omitted.

FIG. 2 is a cross-sectional view showing the configuration of the scroll compressor according to the second embodiment of the present invention.
As shown in FIG. 2, in the scroll compressor 1 </ b> B in this embodiment, a first gasket 50 and a second gasket 51 </ b> B are sandwiched between the lid body 12, the housing body 11, and the fixed scroll 31.

The first gasket 50 has an annular shape that is continuous in the circumferential direction on the outer peripheral side of the opening 13 of the housing body 11. And the front end surface 15 f of the flange portion 15. The first gasket 50 prevents water and the like from entering the housing part 10 from the outside and leakage of the working fluid from the inside of the housing part 10 to the outside.
The first gasket 50 is sandwiched between the front end surface 16f of the flange portion 16 and the front end surface 15f of the flange portion 15 so that the fastening force of the coupling bolt 21 that connects the lid body 12 and the housing body 11 ( Axial force) acts.

The second gasket 51 </ b> B is sandwiched between the front end surface 14 f of the support portion 14 of the lid 12 and the outer peripheral portion of the surface 34 g of the end plate 34 of the fixed scroll 31. The second gasket 51B seals and partitions between the low pressure space S1 on the outer peripheral side of the fixed scroll 31 and the orbiting scroll 32 and the discharge chamber T which is the high pressure space S2.
The second gasket 51B is clamped between the front end surface 14f of the support portion 14 of the lid 12 and the surface 34g of the end plate 34, thereby fastening the fixing bolt 19 that fixes the fixed scroll 31 to the lid 12 Force (axial force) acts.

  Here, the first gasket 50 and the second gasket 51B are formed of the same plate-shaped gasket material.

  Further, on the inner peripheral side of the second gasket 51 </ b> B, a convex portion formed on the front end surface 18 f of the fixed scroll support portion (scroll position fixing portion) 18 of the lid 12 and the inner peripheral portion of the end plate 34 of the fixed scroll 31. 34t directly hits. The convex portion 34t is continuous in the circumferential direction, and has a rib shape protruding toward the lid 12 with respect to the surface 34g of the end plate 34.

  According to the configuration described above, the first gasket 50 is sandwiched between the lid body 12 and the housing body 11 that are coupled to each other, and the second gasket 51B is coupled to the lid body 12 that is coupled to the fixing bolt 19. And the fixed scroll 31. Thereby, even if the lid body 12 and the housing main body 11, and the lid body 12 and the fixed scroll 31 are respectively coupled, the first gasket 50 and the second gasket 51B can be crushed in the same manner and maintained at the same thickness. Thus, even if the cover 12 and the housing body 11 are joined and the first gasket 50 is crushed, the second gasket 51B can be crushed in the same manner, so that the first gasket 50 and the second gasket 51B are crushed. It is possible to suppress variation in the tip clearance, which is the distance between the fixed scroll 31 and the orbiting scroll 32 in the direction of the central axis C of the drive shaft 33, depending on the difference in condition. In this way, it is possible to properly manage the tip clearance in the scroll compressor 1A.

  Moreover, in the fixed scroll support part 18, when the cover body 12 and the fixed scroll 31 directly contact | abut, the positional relationship in the direction which the cover body 12 and the fixed scroll 31 mutually oppose is restrained. Thereby, the position of the fixed scroll 31 can be more reliably fixed. Thereby, the chip clearance in the scroll compressor 1B can be properly managed.

  Furthermore, by forming the first gasket 50 and the second gasket 51B from the same gasket material, it is possible to suppress variations in the thicknesses of the first gasket 50 and the second gasket 51B. Thereby, the chip clearance in the scroll compressor 1B can be managed more easily.

Note that the present invention is not limited to the above-described embodiments, and includes various modifications made to the above-described embodiments without departing from the spirit of the present invention. That is, the specific shapes, configurations, and the like given in the embodiment are merely examples, and can be changed as appropriate.
For example, in each of the embodiments described above, the first gasket 50 and the second gaskets 51A and 51B are arranged at the same position in the direction along the central axis C of the drive shaft 33, but this is not restrictive. . The first gasket 50 and the second gaskets 51 </ b> A and 51 </ b> B may be provided at different positions in the direction along the central axis C of the drive shaft 33. Even in that case, if the first gasket 50 and the second gaskets 51A and 51B are formed of the same material, it is possible to suppress variation in thickness.

  Moreover, the configuration of the scroll compressors 1A and 10B shown in the above-described embodiment is merely an example, and the configuration can be changed as appropriate. Furthermore, the configuration similar to the above can be applied not only to the configuration in which the drive shaft 33 is driven from the outside, but also to an electric integrated scroll compressor having a motor built in the housing.

  Moreover, you may combine suitably the structure of embodiment mentioned above and a modification.

1A, 1B Scroll compressor 10 Housing part 11 Housing body (second housing)
11a End portion 11b End portion 11c Scroll housing portion 11f Matching surface 11h Shaft insertion hole 11s Shaft housing portion 12 Lid (first housing)
12a Inner side surface 12b Outer side surface 12f Matching surface 13 Opening portion 14 Support portion (scroll position fixing portion)
14 f Front end surface 15 Flange portion 15 f Front end surface 15 h Female screw hole 16 Flange portion 16 f Front end surface 16 h Bolt insertion hole 18 Fixed scroll support portion (scroll position fixing portion)
18f Front end surface 18h Bolt insertion hole 19 Fixing bolt (coupling member)
21 coupling bolt 30 compression part 31 fixed scroll 32 orbiting scroll 33 drive shaft 33a one end 33b other end 34 end plate 34f surface 34g surface 34h through hole 34n female screw hole 34s convex part 34t convex part 35 fixing wrap 41 end plate 41f surface 41g surface 41h shaft support hole 42 orbiting wrap 43 bearing 44 bearing 45 seal member 46 eccentric shaft 47 bearing 48 balancer 50 first gasket 51A, 51B second gasket A compression chamber C central axis Ch eccentric shaft S1 low pressure space (low pressure side)
S2 High pressure space (high pressure side)
T Discharge chamber

Claims (3)

A housing portion having a first housing and a second housing coupled opposite to each other;
A compression part including a fixed scroll housed in the housing part and fixed to the first housing; and a revolving scroll provided in the second housing so as to be capable of revolving with respect to the fixed scroll;
A first gasket sandwiched between the first housing and the second housing to seal the inside and outside of the housing ;
The coupling bolt penetrating the first gasket and coupling the first housing and the second housing;
A second gasket sandwiched between the first housing and the fixed scroll and partitioning the high pressure side and the low pressure side of the compression section;
A fixing bolt that passes through the second gasket and connects the first housing and the fixed scroll;
A scroll compressor comprising:   The scroll compressor according to claim 1, further comprising a scroll position fixing portion in which the first housing and the fixed scroll directly abut against each other in a direction in which the first housing and the fixed scroll face each other.   The scroll compressor according to claim 1 or 2, wherein the first gasket and the second gasket are formed of the same gasket material.

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