JP7169433B2 - compressor - Google Patents

Description

The present invention relates to compressors.

As a compressor, for example, there is a compressor disclosed in Patent Document 1.
A compressor disclosed in Patent Document 1 includes a housing, a rotating shaft, a scroll compression mechanism, and a motor.

The housing extends vertically. The housing has a tubular housing body, a first lid covering the lower end of the housing body, and a second lid covering the upper end of the housing body. The first and second lids are each fixed to the housing body by welding.

The rotating shaft is housed in the housing and extends vertically.
A scroll compression mechanism is housed in the upper part of the housing 11 . The scroll compression mechanism has a scroll compression section and a bearing section. The scroll compression mechanism is provided at the upper end of the rotating shaft.
The motor is accommodated in the housing, and rotates the rotary shaft to drive the scroll compression section.

Japanese Patent Application Laid-Open No. 2005-180180

However, as in Patent Document 1, when the second lid portion and the first lid portion are fixed to the housing body using a welding method, the components of the compressor housed in the housing including the scroll compression portion There was a possibility that it would be difficult to easily perform maintenance of

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a compressor in which the components of the compressor housed in a housing including a compression mechanism can be easily maintained.

In order to solve the above problems, according to a compressor according to an aspect of the present invention, a rotating shaft that extends in the axial direction and rotates around the axis, a housing that extends in the axial direction and accommodates the rotating shaft, A motor having a motor rotor provided on the outer peripheral surface of a rotating shaft and a motor stator provided within the housing so as to surround the motor rotor; a first compression mechanism disposed in the housing for compressing a refrigerant; and a first compression mechanism disposed in the housing and disposed at the other end of the rotating shaft for further compressing the refrigerant compressed by the first compression mechanism. and a second compression mechanism, wherein the housing is cylindrical and has a first open end arranged on one side in the axial direction and a second open end arranged on the other side in the axial direction. a housing body having an open end; a first cover fixed to the housing body by a first bolt from one side in the axial direction so as to close the first open end; and the second opening. a second cover fixed to the housing body by a second bolt from the other side in the axial direction so as to close the end, wherein the first compression mechanism is provided on the one side in the axial direction; The second compression mechanism is fixed to the housing body by a fourth bolt from the other side in the axial direction.

According to the present invention, the first cover is fixed to the housing body by the first bolt from one axial side and closes the first open end, and the housing body is secured by the third bolt from one axial side. By providing the first compression mechanism fixed to the housing body, the first lid portion and the first compression mechanism can be easily attached to and detached from the housing body.
This facilitates maintenance of the first compression mechanism and the components of the compressor disposed on the side of the first compression mechanism and accommodated in the housing.

A second cover is fixed to the housing body from the other side in the axial direction by a second bolt to close the second open end, and a fourth bolt is fixed to the housing body from the other side in the axial direction. By providing the second compression mechanism, it is possible to easily attach and detach the second lid portion and the second compression mechanism to the housing body.
Thereby, maintenance of the second compression mechanism and the components of the compressor arranged on the side of the second compression mechanism and accommodated in the housing can be easily performed.

That is, maintenance of the components of the compressor housed in the housing including the first and second compression mechanisms can be easily performed.

Further, in the compressor according to the aspect of the present invention, the first compression mechanism includes a first bearing portion that rotatably supports one end of the rotating shaft, and a and a first compression portion that is fixed and compresses the refrigerant, and the first bearing portion is fixed to the housing body by the third bolt.

In this manner, the first compression mechanism is configured to have the first bearing portion and the first compression portion, and the first bearing portion is fixed to the housing body by the third bolt, whereby the first The bearing portion and the first compression portion can be attached and detached as one structure.

Further, in the compressor according to the aspect of the present invention, the second compression mechanism includes a second bearing portion that rotatably supports the other end portion of the rotating shaft, and a and a second compression portion that is fixed and compresses the refrigerant, and the second bearing portion may be fixed to the housing body by the fourth bolt.

In this manner, the second compression mechanism is configured to have the second bearing portion and the second compression portion, and the second bearing portion is fixed to the housing body by the fourth bolt. The bearing portion and the second compression portion can be attached and detached as one structure.

Further, in the compressor according to the aspect of the present invention, the housing extends in a vertical direction, the first compression section is a rotary compression section arranged at a bottom portion in the housing, and the first The two compression sections may be scroll compression sections located at the top within the housing.

Thus, the present invention may be applied to a vertical compressor having a rotary compression section as the first compression section, a scroll compression section as the second compression section, and a housing extending in the vertical direction.

Further, in the compressor according to the aspect of the present invention, the housing has a motor stator support portion that protrudes radially inward from an inner peripheral surface of the housing body and supports a lower surface of the motor stator, and the motor is supported by the motor. The stator may be fixed to the motor stator support portion from the other side in the axial direction by a fifth bolt.

By having the motor stator support portion and the fifth bolt configured as described above, the motor stator can be easily positioned in the axial direction when the motor stator is installed in the housing.

Further, in the compressor according to the aspect of the present invention, the housing body has an end face arranged on the other side in the axial direction, and the end face is a plane orthogonal to the axial direction. and the second lid portion is in contact with an outer region of the end face arranged outside the inner region so as to expose an inner region of the end face, and the inner region includes the A bolt hole for fastening a fourth bolt may be formed, and a bolt hole for fastening the second bolt may be formed in the outer region.

Thus, by forming the bolt hole for fastening the fourth bolt and the bolt hole for fastening the second bolt on the same end surface (same plane), these bolt holes can be easily formed. as well as reduce the number of planar machining parts

Further, in the compressor according to the aspect of the present invention, the motor stator support portion is configured integrally with the housing body, and the housing body, the motor stator support portion, the first lid portion, and The second lid may be a casting.

In this way, by using castings for the housing main body, the motor stator support portion, the first lid portion, and the second lid portion, the housing main body, the motor stator support portion, and the first lid portion each having a complicated shape are formed. The lid portion and the second lid portion can be easily formed.

ADVANTAGE OF THE INVENTION According to this invention, maintenance of the component of the compressor accommodated in the housing containing the 1st and 2nd compression mechanism can be performed easily.

It is a sectional view showing typically a compressor concerning an embodiment of the present invention. FIG. 2 is an enlarged cross-sectional view of a portion surrounded by a region A in the compressor shown in FIG. 1; 2 is an enlarged cross-sectional view of a portion surrounded by a region B in the compressor shown in FIG. 1; FIG. FIG. 2 is an enlarged cross-sectional view of a portion surrounded by a region C in the compressor shown in FIG. 1;

Embodiments to which the present invention is applied will be described in detail below with reference to the drawings.

(embodiment)
A compressor 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4. FIG.
In FIG. ₁ , O1 indicates the axis of the rotary shaft main body 55 (hereinafter referred to as "axis _O1 "), and _O2 indicates the axis of the eccentric shaft portion 56 (hereinafter referred to as "axis _O2 ").
In FIG. 1, the X direction is the radial direction of the compressor 10, the Z direction is the axial direction (vertical direction) orthogonal to the X direction, and A to C indicate regions.
In FIG. 1, the lower side of the paper is one side in the direction of the axis O ₁ (hereinafter referred to as "one side in the axial direction"), and the upper side of the page is the other side in the direction of the axis O ₁ (hereinafter referred to as "the other side in the axial direction"). ) are shown respectively. In FIG. 1 , a two-cylinder rotary compression section 78 is taken as an example of the first compression section that configures the first compression mechanism 18 .

In FIG. 2, D is a region of the upper end surface 41a where the fourth bolt hole 41F is formed (hereinafter referred to as "inner region D"), and E is located outside the inner region D of the upper end face 41a. , an area where the second bolt hole 41D is formed (hereinafter referred to as an "outer area E").
1 to 4, the same components are denoted by the same reference numerals.

The compressor 10 includes a housing 11, a rotating shaft 13, a lower bearing portion 15, an oil pump 17, a first compression mechanism 18, a third bolt 19, a second compression mechanism 21, a fourth bolt 22 , motor 23 , fifth bolt 24 , discharge valve 26 , bushing assembly 27 , thrust plate 29 , Oldham ring 30 , cover 31 and discharge pipe 35 .

The housing 11 has a semi-sealed structure. An oil reservoir 39 formed by accumulating oil 38 is arranged in the bottom portion 11A inside the housing 11 .
The housing 11 includes a housing body 41, a motor stator support portion 42, a first compression mechanism support portion 43, a first lid portion 44, a second lid portion 45, a first bolt 46, a second 2 bolts 47;

The housing body 41 is cylindrical and extends in the Z direction. The housing body 41 has a first open end 41A arranged on one side in the axial direction, a second open end 41B arranged on the other side in the axial direction, a first bolt hole 41C, and a second bolt hole. 41D and a fourth bolt hole 41F.

The housing body 41 has an upper end face 41a (end face) arranged on the other side in the axial direction and a lower end face 41b arranged on the one side in the axial direction. The upper end surface 41a and the lower end surface 41b are planes perpendicular to the Z direction.

A plurality of first bolt holes 41</b>C are formed in the lower end portion of the housing body 41 . The first bolt hole 41C is formed extending upward (the other side in the axial direction) from the lower end surface 41b. 41 C of several 1st bolt holes are arrange|positioned at intervals in the circumferential direction of the housing main body 41. As shown in FIG.

A plurality of second bolt holes 41</b>D are formed in the upper end portion of the housing body 41 . The plurality of second bolt holes 41</b>D are arranged at intervals in the circumferential direction of the housing body 41 . The second bolt hole 41D is formed extending downward (one side in the axial direction) from the upper end surface 41a.

A plurality of fourth bolt holes 41F are formed in an inner area D of the upper end portion of the housing body 41, which is located inside an outer area E in which the second bolt holes 41D are formed.
The plurality of fourth bolt holes 41</b>F are arranged at intervals in the circumferential direction of the housing body 41 . The fourth bolt hole 41F is formed extending downward (one side in the axial direction) from the upper end surface 41a.

That is, the plurality of second and fourth bolt holes 41D and 41F are formed in the upper end surface 41a that is the same plane.
By forming the plurality of second and fourth bolt holes 41D and 41F in the upper end surface 41a which is the same plane in this manner, the plurality of second and fourth bolt holes 41D and 41F can be easily formed. It is possible to reduce the number of planar machining parts.

The first lid portion 44 is arranged directly below the housing body 41 so as to contact the lower end surface 41b. The first lid portion 44 closes the first open end 41A.
A plurality of bolt holes 44A are formed in the first lid portion 44 . 44 A of bolt holes are formed so that the part which opposes 41 C of 1st bolt holes in a Z direction among the 1st cover parts 44 may be penetrated.

The second lid portion 45 is arranged on the housing body 41 . The second lid portion 45 is in contact with an outer region E in which a plurality of second bolt holes 41D are formed and an inner region D in which a plurality of fourth bolt holes 41F are formed in the upper end surface 41a. Exposed. The second lid portion 45 closes the second open end 41B.
The second lid portion 45 has a plurality of bolt holes 45A and a discharge pipe mounting portion 45B. The bolt hole 45A penetrates through a portion of the first lid portion 44 that faces the first bolt hole 41C in the Z direction.

The motor stator support portion 42 is provided on the inner peripheral surface 41 c of the housing body 41 . The motor stator support portion 42 is configured integrally with the housing body 41 . The motor stator support portion 42 protrudes radially inward from the inner peripheral surface 41 c of the housing body 41 .

The motor stator support portion 42 is a member that supports the lower surface 59 a side of the motor stator 59 . The motor stator support portion 42 has an upper surface 42a and a fifth bolt hole 42B.

The upper surface 42a is a plane perpendicular to the Z direction. The upper surface 42 a is in contact with the lower surface 59 a of the motor stator 59 . Thereby, the motor stator support portion 42 supports the lower surface 59 a of the motor stator 59 .

The first compression mechanism support portion 43 is provided on the inner peripheral surface 41 c of the housing body 41 . The first compression mechanism support portion 43 is configured integrally with the housing body 41 . The first compression mechanism support portion 43 protrudes radially inward from the inner peripheral surface 41 c of the housing body 41 .
The shape of the first compression mechanism support portion 43 can be, for example, a C shape when viewed from the Z direction.

The first compression mechanism support portion 43 has a lower surface 43b and a third bolt hole 43A. The lower surface 43b is a plane perpendicular to the Z direction. The lower surface 43b is a surface with which a support portion 76 that constitutes the first compression mechanism 18 is brought into contact.

As the housing main body 41, the motor stator support portion 42, the first compression mechanism support portion 43, the first lid portion 44, and the second lid portion 45, for example, castings may be used.
In this way, by using castings for the housing main body 41, the motor stator support portion 42, the first compression mechanism support portion 43, the first lid portion 44, and the second lid portion 45, the complex shape and the The housing main body 41, the motor stator support portion 42, the first compression mechanism support portion 43, the first lid portion 44, and the second lid portion 45 can be easily formed.

A plurality of third bolt holes 43</b>A are formed in the lower end portion of the first compression mechanism support portion 43 . The plurality of third bolt holes 43A are arranged at intervals in the circumferential direction of the first compression mechanism support portion 43 . The third bolt hole 43A is formed extending upward (the other side in the axial direction) from the lower surface 43b.

A plurality of fifth bolt holes 42</b>B are formed in the upper end portion of the motor stator support portion 42 . The plurality of fifth bolt holes 42B are arranged at intervals in the circumferential direction of the motor stator support portion 42 . The fifth bolt hole 42B is formed extending downward (one side in the axial direction) from the upper surface 42a.

The first bolt 46 is fastened to the bolt hole 44 and the first bolt hole 41C from one side in the axial direction. Thereby, the first lid portion 44 is fixed to the housing main body 41 by the plurality of first bolts 46 in a detachable state with respect to the housing main body 41 .

In this manner, by fixing the first lid portion 44 to the housing body 41 using the first bolt 46 from one side in the axial direction, the first lid portion 44 can be easily attached to the housing body 41 . It is possible to put it on and take it off.
As a result, maintenance of the lower bearing 15 and the oil supply pump 17 (components of the compressor 10 housed in the housing 11) arranged at the bottom inside the housing 11 can be easily performed.

The second bolt 47 is fastened to the bolt hole 45A and the second bolt hole 41D from the other side in the axial direction. Thereby, the second lid portion 45 is fixed to the housing body 41 by a plurality of second bolts 47 in a detachable state with respect to the housing body 41 .

By fixing the second lid portion 45 to the housing body 41 using the second bolt 47 from the other side in the axial direction, the second lid portion 45 can be easily attached to the housing body 41 . It is possible to put it on and take it off.
Thereby, maintenance of the components of the compressor 10 arranged in the upper part in the housing 11 can be easily performed.

The rotating shaft 13 is accommodated in the housing 11 while extending in the Z direction. The rotating shaft 13 has a rotating shaft main body 55 and an eccentric shaft portion 56 .
The rotary shaft main body 55 is cylindrical and rotates around the axis _O1 . The rotary shaft main body 55 has an upper end portion 55A and a lower end portion 55B. The lower end portion 55B passes through the first compression mechanism 18 in the Z direction.

The rotating shaft main body 55 configured as described above is rotated by the lower bearing portion 15, the first bearing portion 75 constituting the first compression mechanism 18, and the second bearing portion 72 constituting the second compression mechanism 21. supported where possible.

The eccentric shaft portion 56 is provided at the upper end of the rotating shaft main body 55 . The eccentric shaft portion 56 has _an axis line _O2 offset (eccentrically) with respect to the axis line O1 as a central axis. The eccentric shaft portion 56 is a cylindrical shaft smaller than the outer diameter of the rotating shaft main body 55 .
The eccentric shaft portion 56 configured as described above revolves around the axis O ₁ when the rotary shaft main body 55 rotates around the axis O ₁ , thereby turning the orbiting scroll 86 constituting the second compression mechanism 21 . Let

The lower bearing portion 15 is fixed to the lower side of the first compression mechanism 18 . The lower bearing portion 15 rotatably supports one axial end of the rotary shaft 13 (one axial end of the rotary shaft main body 55).

The oil supply pump 17 is provided inside the lower bearing portion 15 . The oil supply pump 17 supplies part of the oil 38 accumulated in the bottom portion 11</b>A inside the housing 11 to the scroll compression portion 79 through a through hole (not shown) formed in the rotating shaft 13 .

The first compression mechanism 18 is housed at the bottom inside the housing 11 . The first compression mechanism 18 has a first bearing portion 75 and a two-cylinder rotary compression portion 78 that is a first compression portion.

The first bearing portion 75 has a support portion 76 and a bearing body 77 . The support portion 76 is a disk-shaped member.
The support portion 76 includes an outer portion 76A that contacts the first compression mechanism support portion 43, an inner portion 76B arranged inside the outer portion 76A, a stepped portion 76C, an insertion hole 76D, a bolt hole 76E, have

The outer portion 76A has an upper surface 76Aa that contacts the lower surface 43b of the first compression mechanism support portion 43. As shown in FIG. The upper surface 76Aa is a plane perpendicular to the Z direction.
The upper surface of the inner portion 76B protrudes upward from the upper surface 76Aa of the outer portion 76A. Thereby, a stepped portion 76C is formed on the upper surface side of the boundary portion between the outer portion 76A and the inner portion 76B.

Thus, by forming the stepped portion 76C between the upper surface 76Aa of the outer portion 76A and the upper surface of the inner portion 76B that contact the lower surface 43b of the first compression mechanism support portion 43, the stepped portion 76C allows the first can be arranged at a desired position in the radial direction.

The insertion hole 76D is formed so as to pass through the center of the inner portion in the Z direction. The insertion hole 76D is a hole for inserting the lower end portion side of the rotating shaft main body 55 .
The bolt hole 76E is formed to pass through the outer portion 76A facing the third bolt hole 42A in the Z direction.

The bearing main body 77 is provided on the inner peripheral surface of the support portion 76 that defines the insertion hole 76D. The bearing main body 77 is arranged between the outer peripheral surface of the rotary shaft main body 55 and the support portion 76 in the radial direction. The bearing body 77 rotatably supports one end of the rotating shaft body 55 .

The two-cylinder rotary compression section 78 is arranged on the bottom section 11</b>A inside the housing 11 and is immersed in the oil reservoir 39 .
The two-cylinder rotary compression section 78 is fixed to the lower side of the first bearing section 75 . As a result, the first bearing portion 75 and the two-cylinder rotary compression portion 78 are integrally formed.

The two-cylinder rotary compression section 78 has a first rotary compression section 81 and a second rotary compression section 82 .

The first rotary compression section 81 and the second rotary compression section 82 are supplied with gas-phase refrigerant (hereinafter simply referred to as "refrigerant") from an accumulator (not shown) that separates the refrigerant into gas and liquid. The first rotary compression section 81 and the second rotary compression section 82 compress the refrigerant supplied from the accumulator.

The second rotary compression section 82 is stacked on the first rotary compression section 81 . The refrigerants compressed by the first rotary compression section 81 and the second rotary compression section 82 are supplied to the second compression mechanism 21 arranged above the two-cylinder rotary compression section 78 .

The third bolt 19 is fastened to the bolt hole 76E and the third bolt hole 42A from one side in the axial direction.

By fixing the first compression mechanism 18 to the housing main body 41 with the third bolt 19 from one axial direction side in this way, the housing main body 41 can be removed after the first lid portion 44 is removed from the housing main body 41 . It becomes possible to remove the first compression mechanism 18 from the .
As a result, maintenance of the first compression mechanism 18 and the components of the compressor 10 arranged on the side of the first compression mechanism 18 and accommodated in the housing 11 can be easily performed.

The second compression mechanism 21 is housed in the upper part inside the housing 11 . The second compression mechanism 21 has a second bearing portion 72 and a scroll compression portion 79 that is a second compression portion.

The second bearing portion 72 has a support portion 61 and a bearing body 62 .
The support portion 61 is a member that supports the bearing main body 62 and is housed inside the housing 11 . The support portion 61 is fixed to the housing body 41 while being in contact with the inner portion of the upper end surface 41 a of the housing body 41 .
A concave portion 64 , a through hole 65 and a bolt hole 66 are formed in the support portion 61 .

The recessed portion 64 is formed in the central portion of the upper side of the support portion 61 facing the second lid portion 45 . The concave portion 64 is recessed in a direction from the second lid portion 45 toward the first lid portion 44 . The recess 64 is a columnar space.

The through hole 65 is formed in the central portion of the lower side of the support portion 61 facing the first lid portion 44 . The upper end side of the through hole 65 communicates with the recess 64 . The through hole 65 is a cylindrical hole. The opening diameter of the through hole 65 is smaller than the opening diameter of the recess 64 . An upper end portion 55A of the rotating shaft main body 55 is arranged in the through hole 65 .

The bolt hole 66 is formed to pass through the support portion 61 facing the fourth bolt hole 41F in the Z direction.

The bearing main body 62 is provided on the surface of the support portion 61 that defines the through hole 65 . The bearing main body 62 faces the outer peripheral surface of the upper end portion 55A of the rotating shaft main body 55 . The bearing main body 62 supports the rotating shaft main body 55 in the radial direction in a rotatable state.

The scroll compression part 79 is provided in the upper part inside the housing 11 and arranged between the cover 31 and the motor 23 .
The scroll compression section 79 has a fixed scroll 85 and an orbiting scroll 86 .

The fixed scroll 85 is arranged between the cover 31 and the orbiting scroll 86 . The fixed scroll 85 has an end plate 85A and a fixed wrap 85B.

The end plate 85A is disc-shaped. The end plate 85A is fixed onto the second bearing portion 72 that constitutes the second compression mechanism 21 .
The end plate 85A has an upper surface, a lower surface, and a discharge port 85C. The discharge port 85C has. The discharge port 85C is formed extending in the Z direction so as to penetrate through the center of the end plate 85A.
The discharge port 85</b>C is a through hole for discharging the refrigerant compressed by the scroll compression portion 79 to the outside of the scroll compression portion 79 .
The fixing wrap 85B protrudes downward from the lower surface of the end plate 85A. The fixed wrap 85B is a wall formed in _a spiral shape when viewed from the direction of the axis O1.

The orbiting scroll 86 is arranged between the fixed scroll 85 and the second bearing portion 72 . The orbiting scroll 86 has an end plate 86A, an orbiting wrap 86B, and a boss portion 86C.

The end plate 86A is disc-shaped. The end plate 86A is arranged on the support portion 61 with the thrust plate 29 interposed therebetween. The end plate 86A is arranged to face the end plate 85A in the Z direction. The end plate 86A has an upper surface and a lower surface facing the upper surface of the end plate 85A.

The turning wrap 86B is provided on the upper surface of the end plate 86A and protrudes upward. The turning wrap 86B is _a spirally formed wall body when viewed from the direction of the axis O1.
The orbiting wrap 86B configured as described above is arranged so as to mesh with the stationary wrap 85B. Thereby, a compression chamber for compressing the refrigerant is formed between the orbiting wrap 86B and the fixed wrap 85B. As the orbiting wrap 86B orbits with respect to the fixed scroll 85, the volume of the compression chamber changes and the refrigerant in the compression chamber is compressed.

The boss portion 86C is provided on the lower surface of the end plate 86A and protrudes downward. The boss portion 86</b>C is a member having a cylindrical shape, and the bottom side thereof is arranged inside the recess portion 64 .
The scroll compression section 79 configured as described above further compresses the refrigerant compressed by the two-cylinder rotary compression section 78 .

The fourth bolt 22 is fastened to the bolt hole 66 and the fourth bolt hole 41F from the other side in the axial direction.
The fourth bolt 22 is a bolt for fixing the second compression mechanism 21 to the motor stator support portion 42 (housing 11) in such a manner that the second compression mechanism 21 can be attached to and detached from the motor stator support portion 42 (housing 11). is.

In this way, by fixing the second compression mechanism 21 to the housing body 41 with the fourth bolt 22 from the other side in the axial direction, the housing body 41 can be removed after the second lid portion 45 is removed from the housing body 41 . It becomes possible to remove the second compression mechanism 21 from the .
Thereby, the maintenance of the second compression mechanism 21 and the components of the compressor 10 arranged on the side of the second compression mechanism 21 and accommodated in the housing 11 can be easily performed.

The motor 23 is contained within the housing 11 and has a motor rotor 58 and a motor stator 59 .

The motor rotor 58 is fixed to the outer peripheral surface located in the intermediate region of the rotary shaft main body 55 in the Z direction. The motor rotor 58 rotates together with the rotating shaft 13 .

The motor stator 59 is arranged on the motor stator support portion 42 so that the outer portion of the lower surface 59a of the motor stator 59 is in contact with the upper surface 42a of the motor stator support portion 42 . The motor stator 59 is arranged outside the motor rotor 58 so as to face the outer peripheral surface of the motor rotor 58 .
The motor stator 59 is formed with a plurality of bolt holes 59A. The bolt hole 59A is formed in the motor stator 59 facing the fifth bolt hole 42B in the Z direction. The bolt hole 59A penetrates the motor stator 59 in the Z direction.

The fifth bolt 24 is fastened to the bolt hole 59A and the fifth bolt hole 42B from the other side in the axial direction. A fifth bolt 24 is a bolt for fixing the motor stator 59 to the motor stator support portion 42 .

The motor stator 59 is installed in the housing 11 by having the bolt hole 59A formed in the motor stator 59 described above, the motor stator support portion 42 formed with the fifth bolt hole 42B, and the fifth bolt 24. In this case, positioning of the motor stator 59 in the Z direction can be easily performed.

The bushing assembly 27 is provided between the orbiting scroll 86 and the rotating shaft 13 . The bushing assembly 27 connects the orbiting scroll 86 and the rotating shaft 13 . The bushing assembly 27 has a bushing 27A provided between the eccentric shaft portion 56 and the boss portion 86C.

The thrust plate 29 is provided between the end plate 86A and the second bearing portion 72. As shown in FIG. The thrust plate 29 is a member for holding a thrust load generated on the orbiting scroll 86 .

The Oldham ring 30 is provided between the end plate 86A and the end plate 85A. The Oldham ring 30 has projections that are fitted into grooves (not shown) formed in the end plates 86A and 85A. The Oldham ring 30 is a member for suppressing the rotation of the orbiting scroll 86 (rotation about the axis _O2 ) and for converting the rotational motion of the rotating shaft main body 55 into orbiting motion.

The cover 31 is accommodated in the housing 11 and provided on the upper surface of the end plate 85A. The cover 31 forms a discharge space 31A between the inner surface of the cover 31 and the upper surface of the end plate 85A.
When the discharge port 85C is opened by the discharge valve 26, the refrigerant compressed by the scroll compressor 79 is discharged into the discharge space 31A.

The discharge pipe 35 is provided in the housing 11 in communication with the discharge space 31A. The discharge pipe 35 discharges the refrigerant compressed by the compressor 10 to the outside of the compressor 10 .

According to the compressor 10 of this embodiment, the first lid portion 44 is detachably fixed to the housing body 41 by the first bolt 46 from one axial side, and the first lid portion 44 is fixed from one axial side. By fixing the first compression mechanism 18 to the housing main body 41 with the third bolt 19, the first compression mechanism 18 is removed from the housing main body 41 after the first lid portion 44 is removed from the housing main body 41. becomes possible.
As a result, maintenance of the first compression mechanism 18 and the components of the compressor 10 arranged on the side of the first compression mechanism 18 and accommodated in the housing 11 can be easily performed.

Further, the second lid portion 45 is detachably fixed to the housing body 41 from the other axial direction side by a second bolt 47, and the housing body is secured by a fourth bolt 22 from the other axial direction side. By fixing the second compression mechanism 21 to 41 , it becomes possible to remove the second compression mechanism 21 from the housing body 41 after removing the second lid portion 45 from the housing body 41 .
Thereby, the maintenance of the second compression mechanism 21 and the components of the compressor 10 arranged on the side of the second compression mechanism 21 and accommodated in the housing 11 can be easily performed.
That is, maintenance of the components of the compressor 10 housed in the housing 11 including the first and second compression mechanisms 18 and 21 can be easily performed.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the invention described in the scope of the claims. Transformation and change are possible.

In this embodiment, as an example of the compressor 10, a vertical compressor in which the housing 11 and the rotating shaft 13 extend in the vertical direction has been described. It can also be applied to a horizontal compressor in which 13 extends in a horizontal direction perpendicular to the vertical direction.

Further, in the present embodiment, the case where the two-cylinder rotary compression section 78 is used as an example of the rotary compression section has been described as an example, but instead of this, a single-cylinder rotary compression section may be used. .

The present invention is applicable to compressors.

REFERENCE SIGNS LIST 10 compressor 11 housing 11A bottom 13 rotating shaft 15 lower bearing 17 lubrication pump 18 first compression mechanism 19 third bolt 21 second compression mechanism 22 fourth bolt 23 motor 24 fifth bolt 26 discharge valve 27 Bush assembly 27A Bush 29 Thrust plate 30 Oldham ring 31 Cover 31A Discharge space 35 Discharge pipe 38 Oil 39 Oil reservoir 41 Housing body 41a Upper end surface 41A First open end 41b Lower end surface 41B Second open end 41c Inner peripheral surface 41C No. 1 bolt hole 41D Second bolt hole 41F Fourth bolt hole 42 Motor stator support portion 42a, 76Aa Upper surface 42B Fifth bolt hole 43 First compression mechanism support portion 43A Third bolt hole 43b, 59a Lower surface 44 First lid portion 44A, 45A, 59A, 66 Bolt hole 45 Second lid portion 45B Discharge pipe attachment portion 46 First bolt 47 Second bolt 55 Rotating shaft body 55A Upper end portion 55B Lower end portion 56 Eccentric shaft portion 58 Motor rotor 59 Motor stator 61, 76 Support part 62, 77 Bearing main body 64 Recess 65 Through hole 72 Second bearing part 75 First bearing part 76A Outer part 76B Inner part 76C Stepped part 76D Insertion hole 76E Bolt hole 78 Two stage type Rotary Compressor 79 Scroll Compressor 81 First Rotary Compressor 82 Second Rotary Compressor 85 Fixed Scroll 85A, 86A End Plate 85B Fixed Wrap 85C Discharge Port 86 Orbiting Scroll 86B Orbiting Wrap 86C Boss A to C Area D Inside Area E Outer area O ₁ , O ₂ axes

Claims (7)

a rotating shaft that extends in the axial direction and rotates about the axis;
a housing that extends in the axial direction and accommodates the rotating shaft;
a motor having a motor rotor provided on the outer peripheral surface of the rotating shaft and a motor stator provided in the housing so as to surround the motor rotor;
a first compression mechanism housed in the housing and arranged at one end of the rotating shaft for compressing a refrigerant;
a second compression mechanism housed in the housing and arranged at the other end of the rotating shaft for further compressing the refrigerant compressed by the first compression mechanism;
with
The housing has a tubular shape and has a first open end arranged on one side in the axial direction and a second open end arranged on the other side in the axial direction; A first cover portion fixed to the housing body by a first bolt from one side in the axial direction so as to close the open end of the second cover portion, and the other side in the axial direction so as to close the second open end. a second cover fixed to the housing body by a second bolt from the side;
The first compression mechanism is fixed to the housing body by a third bolt from one side in the axial direction,
The second compression mechanism is a compressor fixed to the housing body by a fourth bolt from the other side in the axial direction. The first compression mechanism includes a first bearing portion that rotatably supports one end of the rotating shaft, and a first compression portion that is fixed to the first bearing portion and compresses the refrigerant. , has
2. A compressor according to claim 1, wherein said first bearing portion is fixed to said housing body by said third bolt. The second compression mechanism includes a second bearing portion that rotatably supports the other end of the rotating shaft, and a second compression portion that is fixed to the second bearing portion and compresses the refrigerant. , has
3. A compressor according to claim 2, wherein said second bearing portion is fixed to said housing body by said fourth bolt. The housing extends vertically,
the first compression section is a rotary compression section located at the bottom within the housing;
4. A compressor according to claim 3, wherein said second compression section is a scroll compression section disposed at an upper portion within said housing. the housing has a motor stator support portion that protrudes radially inward from an inner peripheral surface of the housing body and supports a lower surface of the motor stator;
5. The compressor according to any one of claims 1 to 4, wherein the motor stator is fixed to the motor stator support portion by a fifth bolt from the other side in the axial direction. The housing body has an end face arranged on the other side in the axial direction,
The end face is a plane orthogonal to the axial direction,
the second lid portion is in contact with an outer region of the end face arranged outside the inner region so as to expose the inner region of the end face;
A bolt hole for fastening the fourth bolt is formed in the inner region,
The compressor according to any one of claims 1 to 5, wherein a bolt hole for fastening the second bolt is formed in the outer region. The motor stator support portion is configured integrally with the housing body,
6. The compressor according to claim 5, wherein the housing body, the motor stator support, the first lid, and the second lid are cast products.

Images