CN116335946A - Oil suction structure, rear bearing and horizontal compressor - Google Patents

Abstract

The invention provides an oil absorption structure, a rear bearing and a horizontal compressor, wherein the oil absorption structure comprises a base, wherein the base is partially and upwards protruded to form a cavity, and the cavity is composed of connecting walls which are upwards protruded from the base and a bottom cover connected with the connecting walls; the cavity is used for accommodating a journal portion of a rear bearing of the compressor, and when the journal portion is accommodated, an annular first gap is formed between the inner wall of the cavity and the outer wall of the journal portion. The oil suction pipe of the horizontal compressor is not arranged on the oil suction structure, but is arranged at the connecting part of the rear bearing, and meanwhile, through designing the structure of the cavity structure of the oil suction structure and the end surface of the shaft neck part of the rear bearing, the space of the end part of the oil suction structure is reduced, and the short shaft part of the crankshaft is more fully lubricated, so that the reliability of the horizontal compressor is improved.

Description

Oil suction structure, rear bearing and horizontal compressor

Technical Field

The invention relates to the technical field of compressors, in particular to an oil suction structure, a rear bearing and a horizontal compressor.

Background

The oil supply principle and the oil suction structure of the horizontal compressor are different from those of the vertical compressor, the oil suction structure bears the function of transporting lubricating oil, the lubricating oil is transported from an oil sump to each kinematic pair, and the reliability of the compressor is directly influenced by the quality of the design structure.

The existing oil suction structure adopts a sealing sleeve shell structure, the sealing sleeve shell structure comprises a sealing cavity, a base and an oil suction pipe, the base is radially extended from the sealing cavity, and one end of the oil suction pipe is communicated with the sealing cavity; meanwhile, the sealing sleeve shell is made of carbon steel, the oil suction pipe is a copper pipe, and in the process of connection between the oil suction pipe and the sealing sleeve shell in a welding mode, the oil suction pipe is required to extend into the sealing cavity in order to ensure tightness between the oil suction pipe and the sealing sleeve shell, and at the moment, the oil suction pipe occupies the space of the sealing cavity, so that the assembly space between the sealing sleeve and the rear bearing of the compressor is influenced.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the invention and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide an oil suction structure, a rear bearing and a horizontal compressor, wherein an oil suction pipe of the horizontal compressor is not arranged on the oil suction structure, but is arranged on a connecting part of the rear bearing, and meanwhile, through designing the structures of a cavity structure of the oil suction structure and the end face of a shaft neck part of the rear bearing, the space of the end part of the oil suction structure is reduced, and the short shaft part of a crankshaft is more fully lubricated, so that the reliability of the horizontal compressor is improved.

The first aspect of the invention provides an oil absorption structure, comprising a base, wherein the base is partially and upwards protruded to form a cavity, and the cavity is composed of connecting walls which are upwards protruded from the base and a bottom cover connected with the connecting walls;

the cavity is used for accommodating a journal portion of a rear bearing of the compressor, and when the journal portion is accommodated, an annular first gap is formed between the inner wall of the cavity and the outer wall of the journal portion.

According to a first aspect of the present invention, the base is provided with a plurality of mounting holes, and the oil suction structure is connected with the rear bearing of the compressor through the mounting holes.

According to the first aspect of the invention, when the oil suction structure is connected with the rear bearing of the compressor, at least part of the end surface of the shaft neck part is abutted against the inner wall of the bottom cover.

A second aspect of the present invention provides a rear bearing comprising a journal portion and a connecting portion;

the connecting part is used for being connected with the air cylinder;

the connecting part is provided with a through hole which is used for connecting an oil suction pipe and

when the oil suction structure is connected with the rear bearing of the compressor, the inner wall of the cavity of the through hole and the oil suction structure are communicated with the annular first gap formed by the outer wall of the shaft neck of the rear bearing.

According to the second aspect of the invention, the through hole is of an L-shaped structure, one side of the through hole of the L-shaped structure is communicated with the first gap, and the axis of the other side of the through hole of the L-shaped structure is parallel to the end face of the connecting part.

According to a second aspect of the present invention, an end surface of the journal portion is provided with a pump port recessed toward the connecting portion.

A third aspect of the present invention provides a horizontal compressor including the oil suction structure, and the rear bearing.

According to a third aspect of the present invention, the horizontal compressor further comprises:

a housing;

the motor, the crankshaft and the pump body structure are accommodated in the shell;

the pump body structure comprises a front bearing, a cylinder between the front bearing and the rear bearing and a piston;

the crankshaft comprises a long shaft part, an eccentric part and a short shaft part, and an oil delivery hole extending from the end surface of the short shaft part along the axial direction of the crankshaft is arranged in the crankshaft;

the oil absorption structure is arranged on the end face of the shaft neck part, which is away from the connecting part;

the end face of the short shaft part is lower than the end face of the shaft neck part, which is away from the connecting part, and a second gap is formed between the end face of the short shaft part and the inner wall of the bottom cover.

According to a third aspect of the present invention, an end surface of the journal portion is provided with a pump oil port recessed toward the connecting portion;

the pump oil port is communicated with the first gap and the second gap respectively.

According to a third aspect of the present invention, the through hole is provided at a lower side portion of the connecting portion.

According to a third aspect of the invention, the through hole has an L-shaped structure;

one side through hole of the L-shaped structure is communicated with the first gap;

the axis of the through hole on the other side of the L-shaped structure is parallel to the end face of the connecting part, and the angle between the axis and the vertical line of the plane on which the horizontal compressor is placed is less than or equal to 30 degrees.

The oil suction pipe of the horizontal compressor is not arranged on the oil suction structure, but is arranged on the connecting part of the rear bearing, and meanwhile, the structure of the cavity structure of the oil suction structure and the end face of the shaft neck part of the rear bearing can be realized by designing:

1. the oil suction pipe does not need welding, has small volume, simple structure, simplified connection channel process, good tightness and small occupied space;

2. the oil suction structure is in sealing connection with the rear bearing, the space of the runner is fully utilized, and the space of the end part of the oil suction structure is reduced;

3. the oil pumping port is arranged on the end face of the journal portion of the rear bearing, the crankshaft is lubricated more fully, and meanwhile oil pumping of the rotary vane is not affected.

Drawings

Other features, objects, and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments, which is incorporated in and forms a part of the specification, illustrating embodiments consistent with the present application, and together with the description serve to explain the principles of the present application, by referring to the following figures. It is evident that the drawings in the following description are only some embodiments of the present invention and that other drawings may be obtained from these drawings without inventive effort for a person of ordinary skill in the art. Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.

FIG. 1 is a schematic view of a horizontal compressor according to an embodiment of the present invention;

fig. 2 is a cross-sectional view taken along A-A of fig. 1.

Reference numerals

1. Shell body

2. Crankshaft

21. Long shaft portion

22. Eccentric part

23. Short shaft portion

24. Oil delivery hole

25. Rotary vane

31. Front bearing

321. Journal portion

3211. Pump oil port

322. Connecting part

3221. Through hole

33. Cylinder

34. Piston

4. Oil absorption structure

41. Base seat

411. Mounting hole

412. Bolt

42. Connecting wall

43. Bottom cover

S1 first gap

S2 second gap

M oil level

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present specification. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples and the features of the different embodiments or examples presented in this specification may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the expressions of the present specification, the meaning of "plurality" is two or more unless otherwise specifically defined.

Throughout the specification, when a device is said to be "connected" to another device, this includes not only the case of "direct connection" but also the case of "indirect connection" with other elements interposed therebetween. In addition, when a certain component is said to be "included" in a certain device, unless otherwise stated, other components are not excluded, but it means that other components may be included.

Terms representing relative spaces such as "lower", "upper", and the like may be used to more easily describe the relationship of one device to another device as illustrated in the figures. Such terms refer not only to the meanings indicated in the drawings, but also to other meanings or operations of the device in use. For example, if the device in the figures is turned over, elements described as "under" other elements would then be described as "over" the other elements. Thus, the exemplary term "lower" includes both upper and lower. The device may be rotated 90 deg. or at other angles and the terminology representing relative space is to be construed accordingly.

Although the terms first, second, etc. may be used herein to connote various elements in some instances, the elements should not be limited by the terms. These terms are only used to distinguish one element from another element. For example, a first interface, a second interface, etc. Furthermore, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes," and/or "including" specify the presence of stated features, steps, operations, elements, components, items, categories, and/or groups, but do not preclude the presence, presence or addition of one or more other features, steps, operations, elements, components, items, categories, and/or groups. The terms "or" and/or "as used herein are to be construed as inclusive, or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a, A is as follows; b, a step of preparing a composite material; c, performing operation; a and B; a and C; b and C; A. b and C). An exception to this definition will occur only when a combination of elements, functions, steps or operations are in some way inherently mutually exclusive.

Although not differently defined, including technical and scientific terms used herein, all terms have the same meaning as commonly understood by one of ordinary skill in the art to which this specification belongs. The term addition defined in the commonly used dictionary is interpreted as having a meaning conforming to the contents of the related art document and the current hint, so long as no definition is made, it is not interpreted as an ideal or very formulaic meaning too much.

Aiming at the problems in the prior art, the invention provides an oil absorption structure, a rear bearing and a horizontal compressor, wherein the oil absorption structure comprises a base, the base is partially and upwards protruded to form a cavity, and the cavity is composed of connecting walls which are upwards protruded from the base and a bottom cover connected with the connecting walls; the cavity is used for accommodating a journal portion of a rear bearing of the compressor, and an annular first gap is formed between the inner wall of the cavity and the outer wall of the journal portion. The oil suction pipe of the horizontal compressor is not arranged on the oil suction structure, but is arranged at the connecting part of the rear bearing, and meanwhile, through the structural design of the cavity structure of the oil suction structure and the end surface of the shaft neck part of the rear bearing, the space of the end part of the oil suction structure is reduced, and the short shaft part of the crankshaft is more fully lubricated, so that the reliability of the horizontal compressor is improved.

The oil suction structure, the rear bearing and the structure of the horizontal compressor of the present invention will be further described with reference to the accompanying drawings and specific embodiments, and it is to be understood that the various specific embodiments are not limiting of the scope of the present invention.

Fig. 1 and 2 are a schematic structural view and a sectional view in A-A direction of a horizontal compressor according to an embodiment of the present invention. The oil absorbing structure 4 comprises a base 41, wherein the base 41 is partially protruded upwards to form a cavity, and the cavity is composed of connecting walls 42 protruded upwards from the base 41 and a bottom cover 43 connected with the connecting walls 42; the angle between the connecting wall 42 and the bottom cover 43 may be approximately 90 degrees as in fig. 1, i.e. the connecting wall 42 and the bottom cover 43 form a cylindrical cavity. The angle between the connecting wall 42 and the bottom cover 43 may be greater than 90 degrees, and the connecting wall 42 and the bottom cover 43 form a cap-shaped cavity. Further, the connection between the connection wall 42 and the bottom cover 43, and between the connection wall 42 and the base 41 may be arc-shaped. The cavity is used for accommodating the journal portion 321 of the rear bearing of the compressor, and when accommodating the journal portion, an annular first gap S1 is formed between the inner wall of the cavity and the outer wall of the journal portion 321, and the annular first gap S1 can fully store oil, so that ineffective and redundant space in the oil absorption structure is reduced. The oil absorbing structure 4 may be an integrally formed part including the base 41, the connecting wall 42 and the bottom cover 43, the cavity structure formed by the connecting wall 42 and the bottom cover 43 is not limited, the shape of the cavity is adapted to the journal portion 321 of the rear bearing of the compressor, that is, the journal portion 321 of the rear bearing can be accommodated, and an oil storage gap is formed between the inner wall of the cavity and the outer wall of the journal portion 321.

The rear bearing of the present invention includes a journal portion 321 and a connecting portion 322;

the connecting part 322 is used for being connected with the air cylinder 33;

the connecting portion 322 is provided with a through hole 3221, and a channel in the dashed line frame in fig. 1, the through hole 3221 is used for connecting the oil suction pipe 5, and when the oil suction structure 4 is connected with the rear bearing of the compressor, the through hole 3221 is communicated with a first annular gap S1 formed between the inner wall of the cavity of the oil suction structure 4 and the outer wall of the journal portion 321 of the rear bearing. The size of the first gap S1 may be set according to the model of a specific compressor.

According to the invention, the through hole 3221 is used as a connecting channel to be connected with the oil suction pipe to realize oil transportation, the through hole 3221 is connected with the oil suction pipe in an interference fit mode or connected with the oil suction pipe after being connected through a connecting pipe, so that the working procedure of welding the oil suction pipe in the prior art is not needed, and the working procedure and the welding instability are reduced. And the through hole has a simple structure and good sealing performance between the through hole and the oil suction pipe, so the invention simplifies the preparation process of the compressor. The arrangement of the through holes can also save the space of the cavity occupied by the oil suction pipe in the prior art, and space is reserved for the assembly of the oil suction structure and the rear bearing.

In some embodiments, the base 41 of the oil absorbing structure 4 is provided with a plurality of mounting holes 411, and the oil absorbing structure is connected with a rear bearing of the compressor through the mounting holes 411, further, as shown in fig. 1, the sealing connection of the oil absorbing structure 4 with the rear bearing may be achieved by bolts 412 penetrating the mounting holes 411.

In the embodiment of fig. 1, the horizontal compressor includes the oil suction structure and the rear bearing, and may further include:

a housing 1;

a motor (not shown in the figures), a crankshaft and a pump body structure housed in the housing 1;

the pump body structure comprises a front bearing 31, a cylinder 33 between the front bearing 31 and the rear bearing, and a piston 34;

the crankshaft comprises a long shaft part 21, an eccentric part 22 and a short shaft part 23, and an oil delivery hole 24 extending from the end surface of the short shaft part 23 along the axial direction of the crankshaft is arranged in the crankshaft; the piston 34 is fixed to the eccentric portion 22 of the crankshaft in a compression space formed by the front bearing 31, the rear bearing and the cylinder 33, and rotates in synchronization with the crankshaft to compress the refrigerant.

The oil absorbing structure 4 is arranged on the end surface of the shaft neck 321, which is away from the connecting part 322;

the end surface of the short shaft portion 23 is lower than the end surface of the journal portion 321, which is away from the connecting portion 322, and when the oil absorbing structure 4 is connected with the rear bearing of the compressor, part of the end surface of the journal portion 321 abuts against the inner wall of the bottom cover 43, and at this time, the end surface of the short shaft portion 23 and the inner wall of the bottom cover form a second gap S2.

In some embodiments, the through hole 3221 provided in the connection portion 322 may have an L-shaped structure as shown in fig. 1, where a through hole on one side of the L-shaped structure is communicated with the first gap, and an axis of a through hole on the other side of the L-shaped structure is parallel to an end surface of the connection portion 322.

Further, since the end surface of the journal portion 321 of a portion abuts against the inner wall of the bottom cover 43, the portion of the end surface of the journal portion 321 that does not abut against the inner wall of the bottom cover 43 is connected to the first gap S1, and the second gap S2 is connected to the first gap S1 through the portion that does not abut against, when the through hole 3221 is connected to the oil suction pipe 5, oil sequentially passes through the oil suction pipe 5 and the through hole 3221 to enter the first gap S1, then the portion that does not abut against the inner wall of the bottom cover 43 enters the second gap S2 through the end surface of the journal portion 321, and finally the oil is conveyed to each friction pair through the oil conveying hole 24 of the crankshaft that is connected to the second gap S2, and the oil path is visible by the dotted line arrow in fig. 2, so as to reduce abrasion and improve reliability of the whole compressor. The oil suction structure is in sealing connection with the rear bearing, the space of the runner is fully utilized, and the end face of the shaft neck part is abutted against the inner wall of the bottom cover, so that the space of the cavity of the oil suction structure can be reduced. Here, the size of the second gap S2 may be set according to a specific compressor model.

In the rear bearing of the present invention, a portion of the end surface of the journal portion 321 of the rear bearing abuts against the inner wall of the bottom cover 43, and a portion of the end surface does not abut against the inner wall of the bottom cover 43, in some embodiments, the end surface that does not abut against the inner wall of the bottom cover 43 is a pumping port 3211, that is, the end surface of the journal portion 321 is provided with a pumping port 3211 recessed toward the connecting portion 322, and it can be seen that the pumping port 3211 is respectively communicated with the first gap S1 and the second gap S2. The pump oil port is arranged on the end face of the journal part of the rear bearing, so that the crankshaft can be lubricated more fully, and meanwhile, the oil pumping of the rotary vane 25 is not influenced. The pump oil port 3211 may be regarded as a groove structure provided on an end surface of the journal portion 321, and in order to further improve the lubrication effect of the crankshaft, a bottom of the groove structure is lower than an end surface of the short shaft portion 23, so that the oil in the first gap S1 is more easily pumped into the oil delivery hole 24 of the crankshaft through the pump oil port 3211.

In some embodiments, the through hole 3221 may be disposed at a lower portion of the connection portion 322, that is, when the horizontal compressor is placed as shown in fig. 1, the through hole 3221 is disposed at a lower portion of the connection portion 322 in fig. 1, that is, in the connection portion 322 below the crankshaft in fig. 1. At this time, the pump oil port 3211 is provided at an upper portion of the journal portion 321, that is, at an end surface of the journal portion 321 above the crankshaft in fig. 1, so that an upper portion of the rear bearing is sufficiently lubricated, and abrasion of the portion is reduced.

Further, taking the L-shaped structure of the through hole 3221 as an example, an angle between an axis of a through hole on one side parallel to the end surface of the connecting portion and a perpendicular line of a plane on which the horizontal compressor is placed is less than or equal to 30 degrees, for example, an axis of a through hole on one side is perpendicular to the plane on which the horizontal compressor is placed, so that the oil suction pipe 5 connected to the through hole 3221 can be conveniently inserted into the oil surface M.

In summary, the oil suction channel of the horizontal compressor is arranged at the connecting part of the rear bearing, and meanwhile, by designing the cavity structure of the oil suction structure and the structure of the end face of the shaft neck part of the rear bearing, the invention can realize:

1. the oil suction pipe does not need welding, has small volume, simple structure, simplified connection channel process, good tightness and small occupied space;

2. the oil suction structure is in sealing connection with the rear bearing, the space of the runner is fully utilized, and the space of the end part of the oil suction structure is reduced;

3. the oil pumping port is arranged on the end face of the journal portion of the rear bearing, the crankshaft is lubricated more fully, and meanwhile oil pumping of the rotary vane is not affected.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims (11)

1. The oil absorption structure is characterized by comprising a base, wherein the base is locally and upwards protruded to form a cavity, and the cavity is composed of connecting walls which are upwards protruded from the base and a bottom cover connected with the connecting walls;

the cavity is used for accommodating a journal portion of a rear bearing of the compressor, and when the journal portion is accommodated, an annular first gap is formed between the inner wall of the cavity and the outer wall of the journal portion.

2. The oil absorbing structure of claim 1, wherein the base is provided with a plurality of mounting holes, and the oil absorbing structure is connected with a rear bearing of the compressor through the mounting holes.

3. The oil sucking structure of claim 1, wherein at least a part of an end surface of the journal portion collides with an inner wall of the bottom cover when the oil sucking structure is coupled to the rear bearing of the compressor.

4. A rear bearing, characterized by comprising a journal portion and a connecting portion;

the connecting part is used for being connected with the air cylinder;

the connecting part is provided with a through hole which is used for connecting an oil suction pipe and

when the oil suction structure is connected with the rear bearing of the compressor, the through hole is communicated with a first annular gap formed between the inner wall of the cavity of the oil suction structure and the outer wall of the shaft neck of the rear bearing.

5. The rear bearing as claimed in claim 4, wherein the through hole has an L-shaped structure, one side of the L-shaped structure is connected to the first gap, and the other side of the L-shaped structure is connected to the end face of the connecting portion.

6. The rear bearing as set forth in claim 4, wherein an end surface of the journal portion is provided with a pumping port recessed toward the connecting portion.

7. A horizontal compressor comprising an oil suction structure as claimed in any one of claims 1 to 3, and a rear bearing as claimed in claim 4.

8. The horizontal compressor of claim 7, further comprising:

a housing;

the motor, the crankshaft and the pump body structure are accommodated in the shell;

the pump body structure comprises a front bearing, a cylinder between the front bearing and the rear bearing and a piston;

the crankshaft comprises a long shaft part, an eccentric part and a short shaft part, and an oil delivery hole extending from the end surface of the short shaft part along the axial direction of the crankshaft is arranged in the crankshaft;

the oil absorption structure is arranged on the end face of the shaft neck part, which is away from the connecting part;

the end face of the short shaft part is lower than the end face of the shaft neck part, which is away from the connecting part, and a second gap is formed between the end face of the short shaft part and the inner wall of the bottom cover.

9. The horizontal compressor according to claim 8, wherein an end surface of the journal portion is provided with a pump oil port recessed toward the connecting portion;

the pump oil port is communicated with the first gap and the second gap respectively.

10. The horizontal compressor of claim 8, wherein the through hole is provided at a lower side portion of the connection portion.

11. The horizontal compressor of claim 10, wherein the through hole has an L-shaped structure;

one side through hole of the L-shaped structure is communicated with the first gap;

the axis of the through hole on the other side of the L-shaped structure is parallel to the end face of the connecting part, and the angle between the axis and the vertical line of the plane on which the horizontal compressor is placed is less than or equal to 30 degrees.

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