Auxiliary bearing structure, compressor pump body and horizontal rotor compressor

Abstract

The utility model belongs to the technical field of compressors, and discloses an auxiliary bearing structure, a compressor pump body and a horizontal rotor compressor. An auxiliary bearing inner hole is formed in the center of the main body annular wall, and an end face annular groove is formed in the end face of the main body annular wall; the end face annular groove is located between the outer circle of the main body annular wall and the hole wall of the auxiliary bearing inner hole. The end face annular groove serves as an assembling groove of the oil suction cover. The outer circle of the oil suction cover is in interference fit with the inner circle of the annular groove of the end face annular groove; according to the utility model, the end face annular groove is used as the assembly groove of the oil absorption cover, so that the oil absorption cover outer circle of the oil absorption cover is in interference fit with the annular groove inner circle of the end face annular groove, the interference assembly of the oil absorption cover and the auxiliary bearing structure is realized, the roundness and the size of the oil absorption cover are effectively ensured, the oil absorption cover is prevented from falling off, and the service life of the oil absorption cover is prolonged. And therefore, the formation of a crankshaft oil film is ensured, and the whole machine operation effect of the compressor is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of compressor technology, and specifically relates to a secondary bearing structure, a compressor pump body, and a horizontal rotor compressor. Background Technology

[0002] As attached Figure 1 As shown, existing horizontal rotary compressors are generally assembled from a pump body 1, a drive motor 2, and a housing 3; wherein, the pump body 1 includes a main bearing 11, a secondary bearing 12, a rotor piston 13, a crankshaft 14, an oil suction shroud 15, and a cylinder 16, and the assembly relationship between the oil suction shroud 15 and the secondary bearing 12 is shown in the attached figure. Figure 2 As shown.

[0003] Currently, the inner circle 151 of the oil suction cover 15 is usually interference-fitted with the outer circle of the auxiliary bearing 12 to achieve the assembly between the oil suction cover 15 and the auxiliary bearing 12, so as to ensure that the two do not separate due to vibration when the compressor is running. However, the outer tension of the inner circle of the oil suction cover formed by the interference fit between the oil suction cover 15 and the auxiliary bearing 12 causes the roundness of the inner circle 151 of the oil suction cover 15 to deteriorate and the size to increase, which in turn causes the oil suction cover 15 to fall off, resulting in the failure of the oil film formation on the crankshaft and seriously affecting the overall operation of the compressor. Utility Model Content

[0004] In view of the technical problems existing in the prior art, this utility model provides a secondary bearing structure, a compressor pump body and a horizontal rotor compressor to solve the technical problem that the inner circle of the existing oil suction shroud and the outer circle of the secondary bearing are interference fit, which makes the roundness of the oil suction shroud worse and the size larger, thus causing the oil suction shroud to fall off, resulting in the failure of the oil film formation on the crankshaft, which seriously affects the overall operation of the compressor.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a secondary bearing structure, including a main annular wall;

[0007] The main annular wall has a secondary bearing inner hole at its center, and an end face annular groove is provided on the end face of the main annular wall; wherein, the end face annular groove is located between the outer circle of the main annular wall and the hole wall of the secondary bearing inner hole; the end face annular groove serves as an assembly groove for an oil suction cover; wherein, the outer circle of the oil suction cover and the inner circle of the annular groove of the end face annular groove are interference-fitted.

[0008] Furthermore, the depth of the annular groove on the end face h It is larger than the end face size of the oil-absorbing hood.

[0009] Furthermore, the depth of the annular groove on the end face h It is 2-3mm.

[0010] Further, the end face annular groove has a groove width δ of 1-3mm.

[0011] Further, the interference between the outer circular end of the oil suction cover and the inner circular groove of the end face annular groove is 0.05-0.15mm.

[0012] Further, the end face of the main body annular wall is further provided with an annular transition groove; the annular transition groove is located between the end face annular groove and the inner hole of the auxiliary bearing.

[0013] The utility model also provides a compressor pump body comprising the auxiliary bearing structure.

[0014] The utility model also provides a horizontal rotor compressor comprising the compressor pump body.

[0015] The utility model also provides a horizontal rotor compressor comprising the compressor pump body.

[0016] Compared with the prior art, the utility model has the beneficial effects that:

[0017] The auxiliary bearing structure provided by the utility model comprises an end face annular groove arranged on the end face of a main body annular wall, and the end face annular groove is used as an assembly groove of an oil suction cover.

[0018] Further, by arranging the annular transition groove on the end face of the main body annular wall, the deformation caused by the interference fit between the oil suction cover and the auxiliary bearing structure can be effectively absorbed, so that the size and roundness of the inner hole of the auxiliary bearing are slightly affected, and the effect can be ignored. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 Fig. 1 is a longitudinal sectional view of the prior art horizontal rotor compressor;

[0020] Figure 2 Fig. 4 is an assembly schematic view of the oil suction cover and the auxiliary bearing in the prior art horizontal rotor compressor;

[0021] Figure 3 Fig. 5 is a sectional view of the auxiliary bearing structure provided in the utility model;

[0022] Figure 4 Fig. 6 is an assembly schematic view of the auxiliary bearing structure and the oil suction cover provided in the utility model;

[0023] Figure 5 Figure 1 is a longitudinal sectional view of the horizontal rotor compressor provided in the utility model.

[0024] Wherein, 1 pump body, 2 drive motor, 3 shell;11 main bearing, 12 auxiliary bearing, 13 rotor piston, 14 crankshaft, 15 oil suction cover, 16 cylinder;120 main body annular wall, 121 end face annular groove, 122 annular groove inner circle, 123 auxiliary bearing inner hole, 124 annular transition groove;151 oil suction cover inner circle, 152 oil suction cover outer circle, 153 oil suction cover end face. DETAILED DESCRIPTION

[0025] In order to make the technical problems solved by the utility model, technical scheme and beneficial effect more clearly and clearly, the following specific embodiments, the utility model is further described in detail.It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0026] In the description of the present application, it should be explained that, unless otherwise defined, all the technical and scientific terms used by the utility model and the same meaning as the person skilled in the art of the technology field commonly understood.The terms used in the specification of the utility model are only for the purpose of describing the specific embodiments, and are not intended to limit the utility model, and the above-mentioned terms in the present application can be understood by the person skilled in the art.

[0027] Example 1

[0028] As shown in the accompanying Figures 3-4 The embodiment 1 provides a kind of auxiliary bearing structure, including main body annular wall 120;The center of the main body annular wall 120 is provided with auxiliary bearing inner hole 123, and the auxiliary bearing inner hole 123 is used to assemble the short shaft part of crankshaft.

[0029] The end face of the main body annular wall 120 is provided with end face annular groove 121, and the end face annular groove 121 is arranged on the side close to oil suction cover 15, and is located between the outer circle of the main body annular wall 121 and the hole wall of the auxiliary bearing inner hole 123;Wherein, the end face annular groove 121 is used as the assembly groove of the oil suction cover 15, to assemble the oil suction cover 15 in the end of the main body annular wall 120;Specifically, the oil suction cover outer circle 152 of the oil suction cover 15 is interference fit with the annular groove inner circle 122 of the end face annular groove 121, so that the oil suction cover 15 is interference fit in the end face annular groove 121, and the end face annular groove 121 is used to form the limiting fixing of the oil suction cover 15.

[0030] In this embodiment 1, an annular transition groove 124 is provided on the end face of the main annular wall 120. The annular transition groove 124 is located between the end face annular groove 121 and the inner hole 123 of the secondary bearing. By providing an annular transition groove 124 on the end face of the main annular wall 120, the deformation caused by the inward shrinkage force formed when it is interference-fitted with the oil suction cover 15 can be effectively absorbed, so that the influence on the size and roundness of the inner hole 123 of the secondary bearing becomes extremely small and can be ignored.

[0031] Size characteristics description:

[0032] In this embodiment 1, the cross-section of the annular groove 121 on the end face is a rectangular structure; the depth of the annular groove 121 on the end face... h The size of the oil-absorbing cover end face 153 is larger than that of the oil-absorbing cover 15; preferably, the depth of the annular groove 121 on the end face is... h The width δ of the annular groove 121 on the end face is 1-3 mm.

[0033] In the auxiliary bearing structure described in Embodiment 1, the end face annular groove 121 is used as the assembly groove for the oil suction cover 15, so that the outer circle 152 of the oil suction cover 15 and the inner circle 122 of the annular groove 121 are interference-fitted to achieve interference fit between the oil suction cover 15 and the auxiliary bearing structure. The end face annular groove 121 can limit and fix the oil suction cover 15, effectively ensuring the roundness and size of the oil suction cover 15, preventing the oil suction cover 15 from falling off, thereby ensuring the formation of crankshaft oil film, and thus ensuring the overall operation effect of the compressor.

[0034] Example 2

[0035] This embodiment 2 provides a compressor pump body, including a main bearing 11, a secondary bearing 12, a rotor piston 13, a crankshaft 14, an oil suction shroud 15, and a cylinder 16, as shown in the attached figure. Figure 5 As stated above.

[0036] The main bearing 11 and the auxiliary bearing 12 are respectively disposed on both sides of the cylinder 16; the rotor piston 13 is disposed inside the cylinder 16; the auxiliary bearing 12 is fitted with the short shaft diameter of the crankshaft 14, the main bearing 11 is fitted with the long shaft diameter of the crankshaft 14, and the rotor piston 13 is fitted with the eccentric shaft diameter of the crankshaft 14; wherein, the short shaft diameter, eccentric shaft diameter, and long shaft diameter of the crankshaft 14 are connected in sequence; the auxiliary bearing 12 adopts the auxiliary bearing structure as described in Embodiment 1 above.

[0037] It should be noted that the assembly principle and process between the auxiliary bearing 12 and the cylinder 16, the crankshaft 14 are similar to the existing compressor pump body, and will not be described here; in addition, the compressor pump body of the embodiment 2 is suitable for different use conditions, different application fields and different displacement compressors;Among them, different application fields are, for example, air conditioning refrigeration, heat pump heating or refrigeration and freezing.

[0038] Embodiment 3

[0039] As shown in the accompanying Figure 5 Embodiment 3 provides a horizontal rotor compressor, comprising a pump body 1, a driving motor 2 and a shell 3;The pump body 1 adopts the compressor pump body described in the above embodiment 2;Among them, the driving motor 2 is arranged on the outer periphery of the long axis diameter of the crankshaft 14.

[0040] The auxiliary bearing structure, the compressor pump body and the horizontal rotor compressor, the center of the main body annular wall 120 of the auxiliary bearing structure is provided with an auxiliary bearing inner hole 123;The end surface of the main body annular wall 120 is provided with an end surface annular groove 121 for installing the oil suction cover 15;The oil suction cover 15 is installed in the end surface annular groove 121 by the interference fit between the outer circle 152 of the oil suction cover and the inner circle 122 of the annular groove of the end surface annular groove 121;The interference amount between the outer circle 152 of the oil suction cover and the inner circle 123 of the annular groove of the end surface annular groove is set to 0.05-0.15mm, which realizes the interference fit of the end surface annular groove 121 to the outer circle 153 of the oil suction cover, and plays a limiting and fixed fit to the oil suction cover 15, ensures that the horizontal installation oil suction cover does not fall off, and the whole machine will not cause the oil film to be unable to establish due to the oil suction cover falling off, and the whole machine will not be invalid due to the oil suction cover falling off.

[0041] In the utility model, the end surface annular groove for installing the oil suction cover is arranged on the main body annular wall of the auxiliary bearing structure, the interference fit between the end surface annular groove and the outer circle of the oil suction cover forms the interference assembly and the limiting and fixed of the oil suction cover, avoids the oil suction cover from falling off, and further ensures the formation of the crankshaft oil film, so that the running effect of the compressor is ensured.

[0042] The above embodiment is only one of the implementation manners of the utility model technical scheme, and the scope of protection of the utility model is not limited by the embodiment, but also includes any changes, substitutions and other implementation manners easily thought by those skilled in the art within the technical range disclosed by the utility model.

Claims

1. A secondary bearing structure, characterized in that, Includes the main annular wall (120); The main annular wall (120) has a secondary bearing inner hole (123) at its center, and the end face of the main annular wall (120) has an end face annular groove (121); wherein, the end face annular groove (121) is located between the outer circle of the main annular wall (120) and the hole wall of the secondary bearing inner hole (123); the end face annular groove (121) serves as an assembly groove for the oil suction cover (15); wherein, the outer circle (152) of the oil suction cover (15) and the inner circle (122) of the annular groove (121) are interference-fitted.

2. The secondary bearing structure according to claim 1, characterized in that, The depth of the annular groove (121) on the end face h The size of the oil suction cover end face (153) is larger than that of the oil suction cover (15).

3. The secondary bearing structure according to claim 2, characterized in that, The depth of the annular groove (121) on the end face h It is 2-3mm.

4. The secondary bearing structure according to claim 1, characterized in that, The width δ of the annular groove (121) on the end face is 1-3 mm.

5. The secondary bearing structure according to claim 1, characterized in that, The interference fit between the end of the outer circle (152) of the oil suction cover (15) and the inner circle (122) of the annular groove (121) of the end face is 0.05-0.15mm.

6. The secondary bearing structure according to claim 1, characterized in that, The end face of the main annular wall (120) is also provided with an annular transition groove (124); the annular transition groove (124) is located between the end face annular groove (121) and the inner hole (123) of the secondary bearing.

7. A compressor pump body, characterized in that, Includes the secondary bearing structure as described in any one of claims 1-6.

8. A horizontal rotary compressor, characterized in that, Includes the secondary bearing structure as described in any one of claims 1-6.

9. A horizontal rotary compressor, characterized in that, Includes the compressor pump body as described in claim 7.

Images