Oil absorption structure, rear bearing and horizontal compressor

Abstract

The application provides an oil suction structure, a rear bearing and a horizontal compressor. The oil suction structure comprises a base which is partially upwardly protruded to form a cavity. The cavity is composed of connecting walls upwardly protruded from the base and a bottom cover connecting the connecting walls. The cavity is used for accommodating a journal portion of a rear bearing of the compressor. When accommodating the journal portion, an annular first gap is formed between an inner wall of the cavity and an outer wall of the journal portion. The oil suction pipe of the horizontal compressor is not arranged on the oil suction structure but on a connecting portion of the rear bearing. Meanwhile, by designing the cavity structure of the oil suction structure and the structure of an end surface of the journal portion of the rear bearing, the space at the end of the oil suction structure is reduced, the short shaft portion of the crankshaft is more fully lubricated, and thus the reliability of the horizontal compressor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressor, in particular to an oil suction structure, a rear bearing and a horizontal compressor. BACKGROUND

[0002] 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 is responsible for the transportation of lubricating oil, which transports lubricating oil from the oil pool to each moving pair. The design structure directly affects the reliability of the compressor.

[0003] The existing oil suction structure adopts a sealed sleeve structure, which includes a sealed cavity, a base extending radially outward from the sealed cavity, and an oil suction pipe connected to one end of the sealed cavity. In this structure, the oil suction pipe is usually arranged at the lower part of the rear bearing. Due to the limitation of the height reached by the oil surface, the space between the sealed sleeve and the upper part of the rear bearing is an invalid space without lubricating oil transportation, thereby causing the upper part of the rear bearing to be not lubricated and causing wear; at the same time, the sealed sleeve is made of carbon steel material, and the oil suction pipe is made of copper pipe. In the process of connecting the oil suction pipe and the sealed sleeve by welding, in order to ensure the sealing between the two, the oil suction pipe usually needs to extend into the sealed cavity, at this time the oil suction pipe will occupy the space of the sealed cavity, thereby affecting the assembly space between the sealed sleeve and the rear bearing of the compressor.

[0004] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. SUMMARY

[0005] In view of the problems in the prior art, the purpose of the present application is to provide an oil suction structure, a rear bearing and a horizontal compressor. The oil suction pipe of the horizontal compressor is not arranged in the oil suction structure, but is arranged in the connecting part of the rear bearing. At the same time, by designing the cavity structure of the oil suction structure and the structure of the journal end surface of the rear bearing, the end space of the oil suction structure is reduced, the short shaft part of the crankshaft is more fully lubricated, and the reliability of the horizontal compressor is improved.

[0006] The first aspect of the present application provides an oil suction structure, comprising a base, the base is partially upwardly protruding to form a cavity, the cavity is composed of a connecting wall upwardly protruding from the base and a bottom cover connecting the connecting walls;

[0007] The cavity is used for accommodating the journal part of the rear bearing of the compressor, and when accommodating the journal part, an annular first gap is formed between the inner wall of the cavity and the outer wall of the journal part.

[0008] According to the first aspect of the present application, 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.

[0009] According to the first aspect of the present application, when the oil absorption structure is connected with the rear bearing of the compressor, the end surface of the journal portion at least partially abuts against the inner wall of the bottom cover.

[0010] The second aspect of the present application provides a rear bearing, comprising a journal portion and a connecting portion;

[0011] The connecting portion is configured to be connected with a cylinder;

[0012] The connecting portion is provided with a through hole, the through hole is configured to be connected with an oil absorption pipe, and

[0013] When the oil absorption structure is connected with the rear bearing of the compressor, the through hole is in communication with the first gap formed between the inner wall of the cavity of the oil absorption structure and the outer wall of the journal portion of the rear bearing.

[0014] According to the second aspect of the present application, the through hole is in an L-shaped structure, one side of the L-shaped structure is in communication with the first gap, and the other side of the L-shaped structure is parallel to the end surface of the connecting portion.

[0015] According to the second aspect of the present application, the end surface of the journal portion is provided with a pump oil port recessed towards the connecting portion.

[0016] The third aspect of the present application provides a horizontal compressor, comprising the oil absorption structure and the rear bearing.

[0017] According to the third aspect of the present application, the horizontal compressor further comprises:

[0018] a housing;

[0019] a motor, a crankshaft and a pump body structure accommodated in the housing;

[0020] The pump body structure comprises a front bearing, a cylinder between the front bearing and the rear bearing, and a piston;

[0021] The crankshaft comprises a long shaft portion, an eccentric portion and a short shaft portion, and the crankshaft is internally provided with an oil delivery hole extending along the axial direction of the crankshaft from the end surface of the short shaft portion;

[0022] The oil absorption structure is arranged at the end surface of the journal portion away from the connecting portion;

[0023] The end surface of the short shaft portion is lower than the end surface of the journal portion away from the connecting portion, and the end surface of the short shaft portion forms a second gap with the inner wall of the bottom cover.

[0024] According to the third aspect of the present application, the end surface of the journal portion is provided with a pump oil port recessed towards the connecting portion;

[0025] The pump oil outlet is connected with the first gap and the second gap respectively.

[0026] According to the third aspect of the present application, the through hole is arranged at the lower side of the connecting part.

[0027] According to the third aspect of the present application, the through hole is in L-shaped structure.

[0028] One side of the through hole in L-shaped structure is connected with the first gap.

[0029] The other side of the through hole in L-shaped structure is parallel to the end surface of the connecting part, and the angle between the axis of the other side of the through hole and the perpendicular line of the plane on which the horizontal compressor is placed is less than or equal to 30 degrees.

[0030] The oil suction pipe of the horizontal compressor of the present application is not arranged in the oil suction structure, but arranged in 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 surface of the journal part of the rear bearing, the following can be achieved:

[0031] 1. The oil suction pipe does not need to be welded, has small volume, simple structure, simplified connection channel process, good sealing performance, and small space occupied by the oil suction pipe.

[0032] 2. The oil suction structure and the rear bearing are sealingly connected, the flow channel space is fully utilized, and the end space of the oil suction structure is reduced.

[0033] 3. The pump oil outlet is arranged at the end surface of the journal part of the rear bearing, so that the crankshaft can be more fully lubricated, and meanwhile, the oil pumping of the rotary vane pump is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0034] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application. Other features, objects, and advantages of the application will be apparent from the detailed description of non-limiting embodiments that follows, taken in conjunction with the accompanying drawings. It will be apparent to one of ordinary skill in the art that the drawings described below are only some embodiments of the present application, and other drawings can be obtained from these drawings without creative labor. In addition, the drawings are only schematic illustrations of the present disclosure, and are not necessarily drawn to scale. The same reference numerals in the drawings represent the same or similar parts, and thus repeated description thereof will be omitted. Some of the block diagrams shown in the drawings are functional entities, which do not necessarily correspond to physically or logically independent entities.

[0035] Figure 1 The structure schematic diagram of the horizontal compressor of an embodiment of the present application;

[0036] Figure 2 The structure schematic diagram of the horizontal compressor of an embodiment of the present application; Figure 1 The sectional view along the direction of A-A.

[0037] Figure Labels

[0038] 1. Shell

[0039] 2 Crankshaft

[0040] 21 Long shaft section

[0041] 22. Eccentric part

[0042] 23 Short shaft section

[0043] 24 Oil supply hole

[0044] 25 Rotary Plates

[0045] 31 Front bearing

[0046] 321 journal bearing

[0047] 3211 Pump oil port

[0048] 322 Connecting part

[0049] 3221 Through Hole

[0050] 33 cylinders

[0051] 34 Pistons

[0052] 4. Oil-absorbing structure

[0053] 41 Base

[0054] 411 Mounting Hole

[0055] 412 bolts

[0056] 42 Connecting wall

[0057] 43 Bottom Cover

[0058] S1 First Gap

[0059] S2 Second Gap

[0060] M oil surface Detailed Implementation

[0061] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that this disclosure will be more comprehensive and complete, and will fully convey the concept of the exemplary 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.

[0062] In the description of the present specification, the expression of the term "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" or the like means that the specific feature, structure, material or characteristic represented in connection with the embodiment or example is included in at least one embodiment or example of the present specification. Also, the specific feature, structure, material or characteristic represented can be combined in an appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples represented in the present specification and the features of the different embodiments or examples, without contradiction.

[0063] In addition, the terms "first", "second" are used only for the purpose of representation, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present specification, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0064] Throughout the specification, when it is said that a certain device is "connected" to another device, it not only includes the case of "direct connection", but also includes the case of "indirect connection" in which other elements are placed therebetween. In addition, when it is said that a certain device "includes" a certain constituent element, unless otherwise specifically stated, other constituent elements are not excluded, but it means that other constituent elements can also be included.

[0065] The relative spatial terms such as "lower", "upper" and the like can be used for the purpose of more easily explaining the relationship of a device illustrated in the drawings with respect to another device. Such terms mean not only the meaning indicated in the drawings, but also include other meanings or operations of the device in use. For example, if the device in the drawing is inverted, a device that was explained as "lower" with respect to the other device is explained as "upper" with respect to the other device. Therefore, the exemplary term of "lower" includes all of up and down. The device can be rotated by 90° or other angles, and the relative spatial terms are also interpreted accordingly.

[0066] Although the terms first, second, etc. can be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first interface and a second interface, etc. are distinguished from each other. Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises", "comprising", "includes" and / or "including", when used herein, specify the presence of stated features, steps, operations, elements, components, items, and / or groups thereof, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, items, and / or groups thereof. As used herein, the terms "or" and "and / or" are to be interpreted as inclusive, i.e., as meaning one or any combination of items. Thus, "A, B or C" or "A, B and / or C" means any of the following: A; B; C; A and B; A and C; B and C; A, B and C. Exceptions to this definition apply only when the combination of elements, functions, steps or actions are mutually exclusive from each other as a matter of some fact.

[0067] Although not differently defined, technical and scientific terms used herein include technical terms and scientific terms commonly used in the art to which the present disclosure pertains, and all terms have the same meaning as commonly understood by one of ordinary skill in the art to which the present disclosure belongs. Terms defined in commonly used dictionaries are to be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

[0068] To solve the problems in the prior art, the present application provides an oil suction structure, a rear bearing and a horizontal compressor. The oil suction structure comprises a base, the base is partially upwardly protruding to form a cavity, the cavity is composed of connecting walls upwardly protruding from the base and a bottom cover connecting the connecting walls; the cavity is used for accommodating a journal portion of a rear bearing of the compressor, and a first gap is formed between an inner wall of the cavity and an outer wall of the journal portion. The oil suction pipe of the horizontal compressor is not arranged in the oil suction structure, but is arranged in a connecting portion of the rear bearing. Meanwhile, by means of the structure of the cavity of the oil suction structure and the structure of the end surface of the journal portion of the rear bearing, the space at the end of the oil suction structure is reduced, the short shaft portion of the crankshaft is more fully lubricated, and thus the reliability of the horizontal compressor is improved.

[0069] The structure of the oil suction structure, the rear bearing and the horizontal compressor of the present application will be further described below in combination with the drawings and specific embodiments. It should be understood that each specific embodiment is not a limitation on the protection scope of the present application.

[0070] Figure 1 and Figure 2These are a schematic diagram and a cross-sectional view along the AA direction of a horizontal compressor according to an embodiment of the present invention. The oil suction structure 4 includes a base 41, which partially protrudes upward to form a cavity. The cavity consists of connecting walls 42 protruding upward from the base 41 and bottom covers 43 connecting the connecting walls 42. The included angle between the connecting walls 42 and the bottom covers 43 can be as follows: Figure 1 The angle between the connecting wall 42 and the bottom cover 43 is close to 90 degrees, forming a cylindrical cavity. The included angle between the connecting wall 42 and the bottom cover 43 can also be greater than 90 degrees, forming a cap-shaped cavity. Furthermore, the connection between the connecting wall 42 and the bottom cover 43, and between the connecting wall 42 and the base 41, can be arc-shaped. The cavity is used to house the journal 321 of the rear bearing of the compressor. When housing the journal, an annular first gap S1 is formed between the inner wall of the cavity and the outer wall of the journal 321. This annular first gap S1 can adequately store oil, reducing ineffective and redundant space within the oil suction structure. The oil suction structure 4 can be an integrally molded part including a base 41, a connecting wall 42 and a 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 can be adapted to the journal 321 of the rear bearing of the compressor, so that the journal 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 321.

[0071] The rear bearing of the present invention includes a journal 321 and a connecting portion 322;

[0072] The connecting part 322 is used to connect with the cylinder 33;

[0073] The connecting part 322 is provided with a through hole 3221. Figure 1 The channel within the dashed box, with the through hole 3221 used to connect the oil suction pipe 5, and when the oil suction structure 4 is connected to the rear bearing of the compressor, the through hole 3221 and the inner wall of the cavity of the oil suction structure 4 are connected to the outer wall of the journal 321 of the rear bearing, forming an annular first gap S1. The size of the first gap S1 can be set according to the specific compressor model.

[0074] The through-hole 3221 of this invention serves as a connecting channel to connect with the oil suction pipe for oil delivery. The through-hole 3221 and the oil suction pipe can be connected via an interference fit or other means, or connected to the oil suction pipe via a connecting pipe. This eliminates the need for welding the oil suction pipe in existing technologies, reducing process and welding instability. Furthermore, the through-hole structure is simple, and the sealing between the through-hole and the oil suction pipe is good. Therefore, this invention simplifies the compressor manufacturing process. The through-hole also saves space in the cavity occupied by the oil suction pipe in existing technologies, allowing space for the assembly of the oil suction structure and the rear bearing.

[0075] In some embodiments, the base 41 of the oil absorption structure 4 is provided with a plurality of mounting holes 411 through which the oil absorption structure is connected with the rear bearing of the compressor. Further, as shown in Figure 1 the oil absorption structure 4 can be sealingly connected with the rear bearing through bolts 412 penetrating the mounting holes 411.

[0076] Figure 1 In some embodiments, the horizontal compressor comprises the oil absorption structure and the rear bearing, and further comprises:

[0077] a housing 1;

[0078] a motor (not shown in the figure), a crankshaft and a pump body structure accommodated in the housing 1;

[0079] the pump body structure comprises a front bearing 31, a cylinder 33 and a piston 34 between the front bearing 31 and the rear bearing;

[0080] the crankshaft comprises a long shaft portion 21, an eccentric portion 22 and a short shaft portion 23, and is internally provided with an oil delivery hole 24 extending along the axial direction of the crankshaft from the end face of the short shaft portion 23; the piston 34 is arranged in a compression space formed by the front bearing 31, the rear bearing and the cylinder 33, and is fixed to the eccentric portion 22 of the crankshaft and rotates synchronously with the crankshaft to compress refrigerant.

[0081] the oil absorption structure 4 is arranged at the end face of the journal portion 321 away from the connecting portion 322;

[0082] the end face of the short shaft portion 23 is lower than the end face of the journal portion 321 away from the connecting portion 322, and when the oil absorption structure 4 is connected with the rear bearing of the compressor, part of the end face of the journal portion 321 abuts against the inner wall of the bottom cover 43, at this time, the end face of the short shaft portion 23 forms a second gap S2 with the inner wall of the bottom cover.

[0083] In some embodiments, the through hole 3221 of the connecting portion 322 can be in an L-shaped structure as shown in Figure 1 one side of the L-shaped structure communicates with the first gap, and the other side of the L-shaped structure has an axis parallel to the end face of the connecting portion 322.

[0084] Furthermore, since part of the journal 321 end face abuts against the inner wall of the bottom cover 43, the part of the journal 321 end face that does not abut against the inner wall of the bottom cover 43 is connected to the first gap S1. Through the part that does not abut, the second gap S2 is connected to the first gap S1. When the through hole 3221 is connected to the oil suction pipe 5, oil sequentially enters the first gap S1 through the oil suction pipe 5 and the through hole 3221, then enters the second gap S2 through the part of the journal 321 end face that does not abut against the inner wall of the bottom cover 43, and finally is delivered to each friction pair through the crankshaft oil supply hole 24 that is connected to the second gap S2. The above oil path is visible. Figure 2 The dashed arrows indicate reduced wear and improved overall compressor reliability. The oil suction structure and rear bearing are sealed together, fully utilizing the flow channel space. The contact between the journal end face and the inner wall of the bottom cover reduces the space required for the oil suction structure cavity. Here, the size of the second gap S2 can be set according to the specific compressor model.

[0085] The journal 321 of the rear bearing of the present invention has a portion of its end face in contact with the inner wall of the bottom cover 43, and a portion of its end face does not in contact with the inner wall of the bottom cover 43. In some embodiments, the end face that does not in contact with the inner wall of the bottom cover 43 is a pump port 3211, that is, the end face of the journal 321 is provided with a pump port 3211 recessed towards the connecting portion 322. It can be seen that the pump port 3211 is connected to the first gap S1 and the second gap S2 respectively. The pump port is provided on the end face of the journal of the rear bearing, so that the crankshaft can achieve more sufficient lubrication, while not affecting the oil pumping of the vane 25. The pump port 3211 can be regarded as a groove structure provided on the end face of the journal 321. In order to further improve the lubrication effect of the crankshaft, the bottom of the groove structure is lower than the end face of the short shaft portion 23, so that the oil in the first gap S1 can be more easily drawn into the oil supply hole 24 of the crankshaft through the pump port 3211.

[0086] In some embodiments, the through hole 3221 may be provided on the lower part of the connecting portion 322, that is, when the horizontal compressor is used as... Figure 1 When placed as shown, through hole 3221 is provided in Figure 1 The lower part of the connecting part 322 in the middle, that is Figure 1 Inside the connecting portion 322 below the crankshaft. At this time, the oil pump port 3211 is located on the upper part of the journal 321, that is... Figure 1 The journal 321 end face above the middle crankshaft ensures adequate lubrication of the upper part of the rear bearing, reducing wear in this area.

[0087] Further, taking the L-shaped structure of the through hole 3221 as an example, the angle between the axis of the one-side through hole parallel to the end surface of the connecting portion and the vertical line of the plane on which the horizontal compressor is placed is less than or equal to 30 degrees, such as the axis of the one-side through hole being perpendicular to the plane on which the horizontal compressor is placed, so that the oil suction pipe 5 connected with the through hole 3221 can be conveniently inserted into the oil surface M.

[0088] In summary, the oil suction passage of the horizontal compressor of the present application is arranged at the connecting portion of the rear bearing, and meanwhile, by designing the oil suction structure cavity structure and the structure of the end surface of the journal portion of the rear bearing, the following can be achieved:

[0089] 1. The oil suction pipe does not need to be welded, has small volume, simple structure, simplified connecting passage process, good sealing performance, and small space occupied by the oil suction pipe;

[0090] 2. The oil suction structure and the rear bearing are sealingly connected, the flow passage space is fully utilized, and the end portion space of the oil suction structure is reduced;

[0091] 3. The oil suction port is arranged at the end surface of the journal portion of the rear bearing, the crankshaft is more fully lubricated, and meanwhile, the vane pump oiling is not affected.

[0092] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims.

Claims

1. A horizontal compressor characterized by, The utility model relates to a horizontal compressor, comprising: a housing; a motor, a crankshaft and a pump body structure accommodated in the housing; the crankshaft comprises a long shaft part, an eccentric part and a short shaft part, and an oil delivery hole extending in the axial direction of the crankshaft from the end face of the short shaft part is arranged in the interior of the crankshaft; the pump body structure comprises a front bearing, a rear bearing, a cylinder between the front bearing and the rear bearing and a piston; the rear bearing comprises a journal part and a connecting part; the connecting part is connected with the cylinder; the connecting part is provided with a through hole, and the through hole is connected with an oil suction pipe; an oil suction structure is arranged on the end face of the journal part away from the connecting part and comprises a base, the base is partially upwardly protruding to form a cavity, the cavity is composed of connecting walls upwardly protruding from the base and a bottom cover connecting the connecting walls, the cavity accommodates the journal part of the 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 part; the through hole is connected with the annular first gap between the inner wall of the cavity of the oil suction structure and the outer wall of the journal part of the rear bearing; the through hole has an L-shaped structure; one side of the L-shaped structure is connected with the first gap; the other side of the L-shaped structure has an axis parallel to the end face of the connecting part, and the angle between the axis and the perpendicular line of the plane on which the horizontal compressor is placed is less than or equal to 30 degrees; the end face of the short shaft part is lower than the end face of the journal part away from the connecting part, and the end face of the short shaft part and the inner wall of the bottom cover form a second gap; the end face of the journal part is provided with a pump oil port recessed towards the connecting part; the pump oil port is respectively connected with the first gap and the second gap.

2. The horizontal compressor according to claim 1, characterized in that, The through hole is arranged on the lower side of the connecting part.

3. The horizontal compressor according to claim 1, wherein 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.

4. The horizontal compressor according to claim 1, characterized in that, When the oil suction structure is connected with the rear bearing of the compressor, at least part of the end face of the journal part is in contact with the inner wall of the bottom cover.

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