CN212055124U - Compressor with a compressor housing having a plurality of compressor blades - Google Patents

Abstract

The utility model relates to a compressor (1), the compressor (1) comprises a main bearing seat (10), the main bearing housing (10) comprising a main bearing housing body (16) and for supporting a compression mechanism (30) of the compressor (1), the main bearing housing body (16) includes a main bearing installation part (17), a main bearing (11) is arranged at the main bearing installation part (17) to support a rotating shaft (20) of the compressor, the main bearing-housing body (16) defining a cavity (12) in which the rotary shaft (20) is engaged to the compression mechanism (30) to drive the compression mechanism, the main bearing (11) is at least partially exposed to the cavity (12), the main bearing housing body (16) further comprising a vent (13) opening into the cavity (12) to allow suction gas from a suction port of the compressor to directly enter the cavity (12). The utility model provides a lubricated compressor of modified oil mist.

Description

Compressor with a compressor housing having a plurality of compressor blades

Technical Field

The present invention relates to the field of compressors, and in particular, to compressors having improved oil mist lubrication.

Background

The compressor generally includes a housing, a compression mechanism accommodated in the housing, a rotary shaft driving the compression mechanism, a motor providing power to rotate the rotary shaft, and the like. Each movable component of the compressor (e.g., the movable scroll component of the scroll compressor, the rotor of the rotary compressor, bearings, etc.) requires lubrication with a lubricating oil to maintain the operational stability and reliability of each movable component and the overall compressor. Therefore, the lubricating oil circulation system of the compressor is an important component of the compressor.

When the compressor is running, lubricating oil is delivered from the oil sump to each movable component of the compressor, for example under the action of a pressure difference or under the action of an oil pumping mechanism, so as to lubricate each component and maintain the normal operation of the movable component, and finally returns to the oil sump. Furthermore, it can carry away impurities between the contact surfaces of the respective components during circulation of the lubricating oil to reduce wear, and heat of the respective components due to friction or current.

In the prior art, each movable part of the compressor (for example, a friction pair in the compressor) is lubricated by using an oil mist lubrication method. In this oil mist lubrication mode, the suction gas carrying the lubricant oil from the compressor suction port enters the compression mechanism from the outside of the main bearing housing substantially through the outer kidney-shaped hole of the main bearing housing after passing through the motor, thereby causing only a small amount of suction oil mist to be emitted into the cavity of the main bearing housing, which is disadvantageous for lubrication and heat dissipation of the main bearing and the like located in the cavity. In particular, the mating keys of the oldham ring are typically mounted in key slots formed as blind slots (e.g., of the main bearing housing), and the keys of the oldham ring located in the blind slots result in insufficient heat dissipation and lubrication of the keys due to the fact that three sides are joined by the slot walls making it difficult for oil mist to flow around the keys.

Accordingly, there is room in the art for improved oil mist lubrication.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide a compressor with improved oil mist lubrication.

According to an aspect of the utility model, a compressor is provided, the compressor includes main bearing housing, main bearing housing includes main bearing housing body and is used for the support the compression mechanism of compressor, main bearing housing body includes main bearing setting portion department is provided with the main bearing in order to support the rotation axis of compressor, main bearing housing body is injectd there is the cavity, the rotation axis is in join in the cavity extremely compression mechanism is in order to drive compression mechanism, wherein, the main bearing exposes in at least partially in the cavity, main bearing housing body still includes and accesss to the cavity is in order to allow to come from the suction gas of the port of breathing in of compressor directly gets into the air vent of cavity.

In some embodiments of the invention: the compression mechanism includes a movable scroll part, and the compressor further includes an oldham ring disposed between the main bearing housing body and the movable scroll part to prevent the movable scroll part from rotating, the oldham ring including an annular body, a first key provided on the annular body to be fitted with the movable scroll part, and a second key to be fitted with the main bearing housing body, and the oldham ring including a first clearance portion configured to make the annular body stand clear of the main bearing housing body.

In some embodiments of the present invention, the main bearing housing body includes a passage for receiving the first key, the passage including a first axial thrust surface facing the oldham ring, the first overhead portion including a first protrusion configured to extend from the annular body toward and abut the first axial thrust surface.

In some embodiments of the invention, the circumferential width of the channel is greater than the circumferential width of the first key.

In some embodiments of the present invention, the main bearing housing body includes a step groove mated with the second key, the step groove includes a second axial thrust surface facing the cross slip ring and a bottom surface facing the cross slip ring that is more remote from the second axial thrust surface, the first overhead portion includes a second protruding portion configured to extend from the annular body toward the second axial thrust surface and abut against the second axial thrust surface.

In some embodiments of the present invention, the axial height of the bottom face is configured such that the end of the second key is spaced apart from the bottom face.

In some embodiments of the present invention, the circumferential width of the step groove is greater than the circumferential width of the second key.

In some embodiments of the present invention, the main bearing housing includes a thrust plate for supporting the compression mechanism, and the oldham ring further includes a second overhead portion configured to suspend the annular body from the thrust plate.

In some embodiments of the invention, the thrust plate comprises a third axial thrust surface facing the oldham ring, the second overhead portion comprises a third protrusion and/or a fourth protrusion configured to extend from the annular body towards and abut the third axial thrust surface.

In some embodiments of the invention: the third protrusion protrudes toward an opposite side at a position of the ring-shaped body corresponding to the second key, and the fourth protrusion protrudes toward the same side at a position of the ring-shaped body adjacent to the first key.

In some embodiments of the invention, the thrust plate includes a radially outwardly open notch for receiving the first key.

In some embodiments of the present invention, the vent hole is provided at a bottom of the main bearing housing body.

In some embodiments of the invention, the vent is provided at the main bearing arrangement and is disposed adjacent to the main bearing.

In some embodiments of the present invention, the compressor is a scroll compressor employing oil mist lubrication.

An advantage of a compressor according to one or more embodiments of the present invention is that improved oil mist lubrication is provided for the various movable parts of the compressor, in particular for the main bearing and the oldham ring.

Drawings

The features and advantages of the present invention will become more readily appreciated from the following description with reference to the accompanying drawings. The figures are exemplary only and not necessarily to scale, in which:

fig. 1 is a longitudinal partial sectional view of a compressor according to an embodiment of the present invention, in which partial components of the compressor such as a compression mechanism, a main bearing housing, a oldham ring, etc. are shown.

Fig. 2 is a perspective view illustrating a main bearing housing of the compressor of fig. 1, in which a vent hole of the main bearing housing is illustrated.

FIG. 3 is an inverted perspective view of the main bearing housing of FIG. 2, showing the passageways and stepped grooves of the main bearing housing.

Fig. 4 is a perspective view illustrating an oldham ring of the compressor of fig. 1.

Fig. 5 is an assembled perspective view showing the oldham ring and main bearing housing of the compressor of fig. 1.

Fig. 6 is an assembled front view showing the oldham ring and main bearing housing of the compressor of fig. 5.

Fig. 7 is an assembly view showing the oldham ring and the main bearing housing of the compressor of fig. 5, viewed from another direction.

Detailed Description

The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. Directional terms used herein, such as "axial" and "radial" and "circumferential," are used with reference to the orientation of the cylindrical shell or rotating shaft of the compressor as shown in the drawings.

A compressor according to an embodiment of the present invention is described below with reference to the accompanying drawings. The drawings show a low pressure sidestep scroll compressor, however, it should be understood that the present invention is also applicable to other types of compressors, such as vertical scroll compressors, rotary compressors, reciprocating compressors, and the like.

Next, a horizontal scroll compressor according to an embodiment of the present invention is described with reference to fig. 1. Fig. 1 is a longitudinal cross-sectional view of an exemplary horizontal scroll compressor 1, wherein the compressor suction oil mist circulation is generally shown by arrows.

As shown, the horizontal scroll compressor 1 includes a housing 60, and a motor (not shown), a rotary shaft 20, and a compression mechanism 30 accommodated in the housing 60. The motor drives the compression mechanism 30 via the rotary shaft 20 to compress a working fluid (e.g., refrigerant).

The housing 60 is generally in the shape of a closed cylinder. The housing 60 may include a main body 61 and first and second end caps 62 and 63 fixed to both axial ends of the main body 61. A suction port (not shown) for sucking the refrigerant is provided to the main body 61, and a discharge port (not shown) for discharging the compressed high-pressure refrigerant is provided to the second end cap 63. A partition (not shown in the drawings) extending generally transversely to the main body 61 is also provided between the main body 61 and the second end cap 63 to divide the interior space of the compressor housing 60 into a high pressure side and a low pressure side. Specifically, a high pressure side space is defined by the second end cap 63 and the partition, and a low pressure side space is defined by the partition, the main body 61, and the first end cap 62. The motor, the rotary shaft 20, and the compression mechanism 30 are located in the low-pressure side space, and such a compressor is also referred to as a low-pressure side compressor.

The motor includes a stator fixed to the housing 60 and a rotor fixed to the rotary shaft 20. When the motor is started, the rotor rotates relative to the stator and rotates the rotary shaft 20.

An end portion of the rotating shaft 20 facing the compression mechanism (left end portion in the drawing) may be supported by the main bearing housing 10 via a main bearing 11, which may be a rolling bearing. The rotating shaft 20 further includes an eccentric crank pin 21 provided at the end for driving the compression mechanism. The rotary shaft 20 of the horizontal scroll compressor 1 extends substantially horizontally. That is, the longitudinal direction of the horizontal scroll compressor 1 is substantially parallel to the horizontal direction.

The compression mechanism 30 includes a non-orbiting scroll member 32 and an orbiting scroll member 31 which mesh with each other. Each of non-orbiting scroll member 32 and orbiting scroll member 31 includes an end plate and a spiral vane extending from one side of the end plate. A series of compression chambers that gradually decrease from the radially outer side to the radially inner side are formed between the spiral vanes of the non-orbiting scroll member 32 and the orbiting scroll member 31. The eccentric crank pin 21 of the rotary shaft 20 is inserted into a boss portion of the orbiting scroll member 31 via a bushing to rotationally drive the orbiting scroll member 31 such that the orbiting scroll member 31 orbits around the non-orbiting scroll member 32 (i.e., the central axis of the orbiting scroll member moves around the central axis of the non-orbiting scroll member, but the orbiting scroll member itself does not rotate around the central axis thereof), to compress refrigerant sucked into the compression chambers of the compression mechanism 30. The compressed refrigerant is discharged into the high-pressure side space via the discharge port of the compression mechanism.

During operation of the scroll compressor, the tangential component of the compressed gas received by its compression pockets generates a moment, i.e., a spinning moment, that causes the orbiting scroll member to orbit about the centerline of the eccentric pin. To prevent the orbiting scroll member from spinning, a oldham ring is generally employed as an anti-spinning mechanism while allowing the orbiting scroll member to orbit in a translatory manner with respect to the non-orbiting scroll member. Therefore, the operation performance of the oldham ring will also affect the operation state and operation stability of the scroll compressor and thus the refrigerating apparatus or the heating apparatus.

The oldham ring generally includes an annular body and two pairs of blocks or keys disposed on the body, with one pair of opposed keys engaging and being relatively reciprocally linearly movable along a pair of keyways on the orbiting scroll member and the other pair of opposed keys engaging and being relatively reciprocally linearly movable along a pair of keyways on the main bearing housing (which may be the non-orbiting scroll member in other embodiments). The line connecting the pair of opposed keys and the line connecting the other pair of opposed keys may be substantially perpendicular.

In operation, the cross slip ring is driven by the movable scroll to do reciprocating linear motion along a pair of key grooves on the main bearing seat or the fixed scroll, and meanwhile, the movable scroll does reciprocating linear motion relative to the cross slip ring along the direction perpendicular to the motion direction of the cross slip ring. That is, the movement of the orbiting scroll part and the oldham ring is the movement which is perpendicular to each other and is performed with the same frequency in synchronization, thereby synthesizing the orbiting translational movement in which the orbiting scroll part orbits relative to the fixed scroll part without being able to rotate.

A lubricating oil supply system is also provided in the compressor to supply lubricating oil to the respective moving parts to lubricate the respective moving parts. The lubricating oil may provide cooling and cleaning functions in addition to the lubricating function for the relevant parts of the compressor. Therefore, the design and the composition of the lubricating oil circuit become an important link for guaranteeing the lubrication and the efficient and stable operation of the compressor in the design of the horizontal scroll compressor.

As a part of the lubricating oil supply system, or as an example of the lubricating oil supply system, a lubricating oil passage is provided in the rotary shaft 20. The lubricating oil passage may include a concentric hole at an end (right side in the drawing) of the rotary shaft 20 opposite to the compression mechanism and an eccentric hole communicating with the concentric hole and extending toward the left end in the drawing. In the illustrated example, the eccentric hole extends through the eccentric crank pin 21 of the rotary shaft 20 to an end surface of the left end (toward the compression mechanism). The eccentric bores are radially offset with respect to the concentric bores and offset with respect to the axis of rotation of the rotating shaft 20.

An oil supply device (e.g., an intermittent supply device) or an oil pumping mechanism by which the lubricating oil in the oil reservoir is pumped into the concentric holes may be provided at the right-side end of the rotating shaft 20. When the rotating shaft 20 rotates, the lubricating oil travels along the eccentric hole toward the left-side end portion by the centrifugal force. The lubricating oil travels to the left end portion of the rotating shaft 20 and exits from the eccentric crank pin 21 of the rotating shaft 20 into the recess of the main bearing housing 10, whereby the bushing can be lubricated. A part of the lubricating oil flows along the outer peripheral surface of the rotary shaft 20, lubricates the main bearing 11 and the like, and then drops to the bottom of the casing, and another part of the lubricating oil may travel between the main bearing housing 10 and the support surface of the orbiting scroll member 31, whereby the formed oil mist enters the compression mechanism or drops to the bottom of the casing.

The lubricating oil that has entered the compression mechanism is discharged into the high-pressure side space together with the compressed gas through the discharge port of the compression mechanism, and a part of the lubricating oil is discharged out of the compressor through the discharge port along with the compressed gas. The lubricating oil leaving the compressor 1 can be returned with the working fluid through the external refrigerant circulation circuit to the compressor 1 again through the suction port.

During operation of the compressor, the movement of the rotating shaft, the orbiting scroll member, the motor rotor, and the like distributes the lubricant oil supplied from the lubricant oil passage of the rotating shaft in the form of oil mist in the space inside the compressor housing, and the lubricant oil is compressed by the compression mechanism and discharged to the high pressure side, thereby lubricating the respective movable members inside the compressor by oil mist lubrication.

The compressor with improved oil mist lubrication of the present invention will be described next with reference to fig. 1 to 7.

Referring to fig. 1 and 2, main bearing housing 10 includes a main bearing housing body 16 and a thrust plate 50 for supporting compression mechanism 30 of compressor 1. In the drawings, the main bearing housing body 16 and the thrust plate 50 are separate bodies, but the main bearing housing body 16 and the thrust plate 50 may be integrally formed. The main bearing-housing body 16 includes a main bearing arrangement 17 at which the main bearing 11 is arranged to support the rotary shaft 20 of the compressor 1, the main bearing-housing 10 defining a cavity 12 in which the rotary shaft 20 is joined to the compression mechanism 30 to drive the compression mechanism 30. A vent 13 may be provided at, for example, the bottom of main bearing housing body 16 to the cavity 12 so that suction gas from the suction port of compressor 1 directly enters cavity 12, with a portion of main bearing 11 exposed in the cavity 12 so that suction gas entering cavity 12 can flow directly to main bearing 11. By means of the ventilation holes, a sufficient amount of suction oil mist is admitted into the cavity to facilitate lubrication and heat dissipation of the main bearing and the like.

In a preferred embodiment, referring to fig. 2, four breather holes 13 are provided at the main bearing arrangement 17 and adjacent to the main bearing 11 in a manner evenly spaced in the circumferential direction about the rotational axis of the rotary shaft 20, wherein the main bearing arrangement 17 is provided at the bottom of the main bearing housing body 16 further facilitating the entry of the suction oil mist into the main bearing, wherein the number of breather holes may be provided as desired. The vent hole 13 may be provided in the form of a partial circular hole on the inner edge of the main bearing setting portion 17 and near the main bearing as shown in fig. 2, however, the provision of the vent hole is not limited thereto, and the vent hole may also be provided in the form of a circular hole in the main bearing setting portion and at a certain distance from the main bearing or more outwardly at other portions of the bottom of the main bearing housing body other than the main bearing setting portion 17. It will be appreciated by those skilled in the art that the vent holes may be square holes, triangular holes, oval or kidney-shaped holes, etc., in addition to circular holes.

In one aspect according to the present invention, an oldham ring 40 is provided between main bearing-housing body 16 and orbiting scroll member 31 to prevent orbiting scroll member 31 from spinning. Referring to fig. 4, oldham ring 40 includes an annular body 43, a first key 41 disposed on annular body 43 for engaging orbiting scroll member 31, and a second key 42 for engaging main bearing housing body 16.

With reference to fig. 3, 4, 5, and 7, main bearing housing body 16 includes a passageway 14 for receiving first key 41, passageway 14 includes a first axial thrust surface 141 facing (e.g., in an axial direction) oldham ring 40, and oldham ring 40 includes a first protrusion 411 configured to extend from annular body 43 toward first axial thrust surface 141 and abut first axial thrust surface 141. This first projection 411 actually forms a first overhead portion that suspends the annular body 43 away from the main bearing housing body 16 to form a gap therebetween that allows the flow of the intake oil mist, thereby facilitating the lubrication of the keys of the oldham ring. Advantageously, with reference to fig. 4, the first protrusion 411 protrudes towards the opposite side at a position of the annular body 43 corresponding to the first key 41. And/or, referring to fig. 5, the circumferential width of the channel 14 is greater than the circumferential width of the first key 41.

In a preferred embodiment, referring to fig. 3, 5 and 6, main bearing housing body 16 includes a stepped groove 15 that mates with second key 42, stepped groove 15 including a second axial thrust surface 151 that faces (e.g., in an axial direction) oldham ring 40 and a base surface 152 that is further away from oldham ring 40 relative to second axial thrust surface 151, oldham ring 40 including a second protrusion 421 configured to extend from annular body 43 toward second axial thrust surface 151 and abut second axial thrust surface 151. Advantageously, the second projection 421 projects toward the same side at a position of the annular body 43 adjacent to the second key 42. Similar to first protrusion 411, this second protrusion 421 actually forms a first overhead portion that suspends annular body 43 from main bearing housing body 16 to form a gap therebetween that allows the flow of the suction oil mist, thereby facilitating lubrication of the keys of the oldham ring.

In the above embodiment, the axial heights of the first axial thrust surface 141, the first protrusion 411, the second axial thrust surface 151, and the second protrusion 421 may be adjusted as necessary to allow a sufficient amount of oil mist to flow by adjusting the distance or clearance by which the annular body 43 is spaced from the main bearing housing body 16.

Advantageously, the axial height of the bottom face 152 is configured such that the tip of the second key 42 is spaced from the bottom face 152 to form a gap that allows the circulation of the suction oil mist, and more advantageously, the stepped groove 15 is formed in the form of an axial through groove, that is, a through hole is formed at a position of the bottom face 152 corresponding to the second key 42. Alternatively, or in addition, the circumferential width of the step groove 15 is greater than the circumferential width of the second key 42.

In another aspect in accordance with the present invention, referring to fig. 1, 4 and 7, thrust plate 50 includes a third axial thrust surface 51 facing oldham ring 40, which includes a third projection 422 and a fourth projection 412 configured to extend from annular body 43 toward third axial thrust surface 51 and abut third axial thrust surface 51. Here, referring to fig. 4, the third protrusion 422 protrudes toward the opposite side at a position of the ring-shaped body 43 corresponding to the second key 42, and the fourth protrusion 412 protrudes toward the same side at a position of the ring-shaped body 43 adjacent to the first key 41. The third projection 422 and the fourth projection 412 in effect form a second overhead portion that suspends the annular body 43 away from the thrust plate 50 to form a gap therebetween that allows the flow of the suction oil mist, thereby facilitating the lubrication and heat dissipation of the corresponding keys of the oldham ring.

In yet another aspect in accordance with the present invention, referring to fig. 5, thrust plate 50 includes a radially outwardly open notch 53 for receiving first key 41 of oldham ring 40 engaged with orbiting scroll member 31, wherein the location of notch 53 corresponds to the location of passageway 14 of main bearing housing body, which makes this first key correspond to the location of the radially outer kidney-shaped aperture (if any) of main bearing housing 10, so as to coincide with the main suction passage from the compressor inlet port flowing through this kidney-shaped aperture, further facilitating lubrication and heat dissipation of the first key.

Although various embodiments of the present invention have been described in detail herein, it is to be understood that the invention is not limited to the precise embodiments herein described and illustrated, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention. All such variations and modifications are intended to fall within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent components.

Claims (14)

1. A compressor comprising a main bearing housing including a main bearing housing body and for supporting a compression mechanism of the compressor, the main bearing housing body including a main bearing setting at which a main bearing is provided to support a rotary shaft of the compressor, the main bearing housing body defining a cavity in which the rotary shaft is joined to the compression mechanism to drive the compression mechanism, wherein the main bearing is at least partially exposed in the cavity,

wherein the main bearing housing body further comprises a vent opening into the cavity to allow suction gas from a suction port of the compressor to directly enter the cavity.

2. The compressor of claim 1, wherein:

the compression mechanism comprises a movable scroll part, the compressor further comprises an oldham ring, the oldham ring is arranged between the main bearing seat body and the movable scroll part to prevent the movable scroll part from rotating, the oldham ring comprises an annular body, a first key which is arranged on the annular body and matched with the movable scroll part, and a second key which is arranged on the annular body and matched with the main bearing seat body, and the oldham ring comprises a first key which is arranged on the annular body and matched with the movable scroll part and a second key which is arranged on the annular body and

the oldham ring includes a first overhead portion configured to aerial the annular body away from the main bearing housing body.

3. The compressor of claim 2, wherein the main bearing housing body includes a passage for receiving the first key, the passage including a first axial thrust surface facing the oldham ring, the first overhead portion including a first protrusion configured to extend from the annular body toward and abut the first axial thrust surface.

4. The compressor of claim 3, wherein a circumferential width of the channel is greater than a circumferential width of the first key.

5. The compressor of claim 2, wherein the main bearing housing body includes a stepped groove that mates with the second key, the stepped groove including a second axial thrust surface that faces the oldham ring and a bottom surface that is further away from the oldham ring relative to the second axial thrust surface, the first overhead portion including a second protrusion configured to extend from the annular body toward the second axial thrust surface and abut the second axial thrust surface.

6. The compressor of claim 5, wherein the axial height of the bottom face is configured such that a tip of the second key is spaced from the bottom face.

7. The compressor of claim 5, wherein a circumferential width of the step groove is greater than a circumferential width of the second key.

8. The compressor of claim 2, wherein the main bearing housing includes a thrust plate for supporting the compression mechanism, the oldham ring further including a second overhead portion configured to overhead the annular body away from the thrust plate.

9. The compressor of claim 8, wherein the thrust plate includes a third axial thrust surface facing the oldham ring, the second overhead portion including a third protrusion and/or a fourth protrusion configured to extend from the annular body toward and abut the third axial thrust surface.

10. The compressor of claim 9, wherein:

the third protrusion protrudes toward an opposite side at a position of the ring-shaped body corresponding to the second key, and the fourth protrusion protrudes toward the same side at a position of the ring-shaped body adjacent to the first key.

11. The compressor of one of claims 8 to 10, wherein the thrust plate includes a radially outwardly open notch for receiving the first key.

12. The compressor of one of claims 1 to 10, wherein the vent is provided at a bottom of the main bearing housing body.

13. The compressor of claim 12, wherein the vent is disposed at the main bearing setting and adjacent to the main bearing.

14. Compressor according to one of claims 1 to 10, characterized in that it is a scroll compressor with oil mist lubrication.

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