A bearing contact type soundproof cover for a co2 automobile air conditioner compressor

Abstract

The utility model discloses a CO2 automobile air conditioner compressor bearing contact type sound cover, including sound cover main part, the front center of sound cover main part is equipped with the integrative bearing seat, and the inner hole of bearing seat contains the deep groove ball bearing. This CO2 automobile air conditioner compressor bearing contact type sound cover, through the setting of bearing seat, deep groove ball bearing, oil sump, wear -resisting bush and wear -resisting coating, inserts deep groove ball bearing in the sound cover bearing seat structure, passes through the design tolerance cooperation again, makes it and the crankshaft surface contact, when the crankshaft is off when being subjected to unbalanced force, contacts the bearing inner ring, and the inner ring will move together with the crankshaft, can effectively reduce the swing and the deflection of crankshaft, and the bearing seat clearance place cavity space can reduce noise to a certain extent, in addition with the rotation of crankshaft, oil lubricates bearing place directly through oil sump also can directly reduce the wear and tear of crankshaft, makes the bearing keep long -term normal operation simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of muffler cover technology, specifically to a CO2 automotive air conditioning compressor bearing contact type muffler cover. Background Technology

[0002] With the development of the automotive industry and increasingly stringent environmental regulations, CO2, as an environmentally friendly refrigerant, is being used more and more widely in automotive air conditioning systems. However, the operating pressure of CO2 automotive air conditioning compressors is much higher than that of traditional refrigerant compressors (such as R134a), typically reaching 10-15 MPa. This places higher demands on the strength and sealing of compressor components. Bearings are the core moving parts of automotive air conditioning compressors, and the noise they generate during operation is one of the main noise sources of the compressor, directly affecting the comfort of passengers inside the vehicle.

[0003] Traditional automotive air conditioning compressor mufflers primarily function to reduce noise and equalize pressure, achieved through their internal cavity structure. However, in high-pressure CO2 refrigeration systems, the compressor crankshaft bearings experience greater loads, making them more prone to vibration and misalignment. Traditional mufflers lack the function of supporting the crankshaft. Furthermore, bearing lubrication becomes more critical under high-speed operation. Utility Model Content

[0004] The technical problem this utility model aims to solve is as follows: It provides a CO2 automotive air conditioning compressor bearing contact-type muffler cover with high practicality, simple operation, and a relatively simple structure. This addresses the issue mentioned in the background art where the main functions of traditional automotive air conditioning compressor mufflers are noise reduction and pressure equalization, achieved through an internal cavity structure. However, in high-pressure CO2 refrigeration systems, the compressor crankshaft bearing experiences a greater load, making it more prone to vibration and misalignment. Traditional mufflers lack the function of supporting the crankshaft. Furthermore, the lubrication problem of the bearing becomes more prominent under high-speed operation.

[0005] The objective of this utility model can be achieved through the following technical solutions:

[0006] A CO2 automotive air conditioning compressor bearing contact type muffler cover includes a muffler cover body. An integrally formed bearing seat is provided at the center of the front side of the muffler cover body. A deep groove ball bearing is accommodated in the inner hole of the bearing seat and is interference-fitted with the outer ring of the deep groove ball bearing. At least one oil groove is opened in the inner wall of the bearing seat along the circumferential or axial direction. A wear-resistant bushing is installed inside the bearing seat, and the surface of the wear-resistant bushing is coated with a wear-resistant coating.

[0007] As a further embodiment of this utility model: an outer ring threaded hole is provided on the surface edge of the muffler cover body, and an inner ring threaded hole is provided in the middle of the surface of the muffler cover body. The outer ring threaded hole and the inner ring threaded hole are used to connect positioning bolts.

[0008] As a further embodiment of this utility model: an annular reinforcing block is provided at the connection between the root of the bearing seat and the main body of the muffler cover, and a placement groove is provided inside the annular reinforcing block to facilitate the installation of reinforcing ribs.

[0009] As a further embodiment of this utility model: the interior of the placement groove is equipped with reinforcing ribs, which are distributed in a ring shape inside the annular reinforcing block, thereby increasing the structural strength of the bearing seat.

[0010] As a further embodiment of this utility model: a mounting groove is provided on one side of both the bearing housing and the wear-resistant bushing. The mounting groove is used to install a temperature sensor for detecting the surface temperature of the deep groove ball bearing, and the mounting groove facilitates the installation of an external temperature sensor.

[0011] As a further embodiment of this utility model: the oil groove is a set of axial straight grooves, and the main body of the muffler cover is integrally formed by high damping aluminum alloy material through metal additive manufacturing process, and the oil groove facilitates the flow of lubricating oil.

[0012] As a further embodiment of this utility model: the outer ring threaded hole is used to fix the external pump body and the housing, the inner ring threaded hole is used for the connection between the muffler cover body and the external pump body, and the muffler cover body is convenient for supporting the bearing seat in the center of the front.

[0013] The beneficial effects of this utility model are:

[0014] By incorporating a bearing housing, deep groove ball bearing, oil groove, wear-resistant bushing, and wear-resistant coating, the system utilizes a bearing housing structure with a deep groove ball bearing and a wear-resistant bushing installed inside. Through meticulous tolerance design, this bushing forms surface contact with the crankshaft. When the crankshaft is subjected to unbalanced forces and shifts, its surface contacts the inner ring of the bearing. The inner ring then moves with the crankshaft, effectively suppressing and reducing crankshaft oscillation and shift. Simultaneously, the clearance between the bearing housing and the wear-resistant bushing, along with the internal cavity space, effectively reduces operating noise. Furthermore, the wear-resistant bushing is coated with a wear-resistant coating that works in conjunction with the optimized oil groove design: as the crankshaft rotates, oil is directly guided to the friction pair interface via the oil groove. This not only achieves efficient lubrication and heat dissipation of the bearing but also directly reduces wear between the crankshaft and the bushing due to the wear-resistant coating, ensuring long-term stable and reliable operation of the bearing and the entire compressor system. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the wear-resistant bushing structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the main structure of the silencer cover of this utility model.

[0020] In the diagram: 1. Silencer cover body; 2. Bearing housing; 3. Deep groove ball bearing; 4. Oil groove; 5. Wear-resistant bushing; 6. Wear-resistant coating; 7. Outer ring threaded hole; 8. Inner ring threaded hole; 9. Annular reinforcing block; 10. Reinforcing rib. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figure 1-4 As shown, a CO2 automotive air conditioning compressor bearing contact type muffler cover includes a muffler cover body 1. An integrally formed bearing housing 2 is located at the center of the front of the muffler cover body 1. Through the arrangement of the bearing housing 2, deep groove ball bearing 3, oil groove 4, wear-resistant bushing 5, and wear-resistant coating 6, during use, the deep groove ball bearing 3 is placed in the bearing housing 2 structure, and the wear-resistant bushing 5 is installed inside the bearing housing 2. Through careful tolerance fitting design, the wear-resistant bushing 5 forms surface contact with the crankshaft. When the crankshaft is subjected to unbalanced forces and shifts, its surface will contact the inner ring of the bearing. At this time, the inner ring will move with the crankshaft, thereby effectively suppressing and reducing the crankshaft's sway and shift. Simultaneously, the gap between the bearing housing 2 and the wear-resistant bushing 5 and the internal cavity... The two working together can effectively reduce operating noise. In addition, the surface of the wear-resistant bushing 5 is coated with a wear-resistant coating 6, which works in conjunction with the optimized oil groove 4 design: as the crankshaft rotates, the oil is directly guided to the interface of the friction pair through the oil groove 4, which not only achieves efficient lubrication and heat dissipation of the bearing, but also directly reduces the wear between the crankshaft and the bushing due to the presence of the wear-resistant coating 6, thereby ensuring that the bearing and even the entire compressor system can operate stably and reliably for a long time. The inner hole of the bearing housing 2 accommodates the deep groove ball bearing 3 and is interference-fitted with the outer ring of the deep groove ball bearing 3. The inner wall of the bearing housing 2 has at least one oil groove 4 along the circumferential or axial direction. The wear-resistant bushing 5 is installed inside the bearing housing 2, and the surface of the wear-resistant bushing 5 is coated with a wear-resistant coating 6.

[0023] like Figure 4 As shown, an outer ring threaded hole 7 is provided on the surface edge of the muffler cover body 1, and an inner ring threaded hole 8 is provided in the middle of the surface of the muffler cover body 1. The outer ring threaded hole 7 and the inner ring threaded hole 8 are used to connect the positioning bolt.

[0024] like Figure 4 As shown, an annular reinforcing block 9 is provided at the connection between the root of the bearing housing 2 and the main body 1 of the muffler cover. The annular reinforcing block 9 has a placement groove inside, which facilitates the installation of the reinforcing rib 10.

[0025] like Figure 4 As shown, reinforcing ribs 10 are installed inside the placement groove. The reinforcing ribs 10 are distributed in a ring inside the annular reinforcing block 9. The reinforcing ribs 10 help to increase the structural strength of the bearing seat 2.

[0026] like Figure 2 As shown, mounting grooves are provided on one side of both the bearing housing 2 and the wear-resistant bushing 5. The mounting grooves are used to install temperature sensors that detect the surface temperature of the deep groove ball bearing 3. The mounting grooves facilitate the installation of external temperature sensors.

[0027] like Figure 2 As shown, the oil groove 4 is a set of axial straight grooves, and the main body 1 of the muffler cover is integrally formed by high damping aluminum alloy material through metal additive manufacturing process. The oil groove 4 facilitates the flow of lubricating oil.

[0028] like Figure 1 As shown, the outer ring threaded hole 7 is used to fix the external pump body and the housing, and the inner ring threaded hole 8 is used for the connection between the muffler cover body 1 and the external pump body. The muffler cover body 1 is convenient for supporting the bearing seat 2 in the center of the front.

[0029] The working principle of this utility model is as follows: When in use, a deep groove ball bearing 3 is placed in the structure of the silencer cover bearing housing 2, and a wear-resistant bushing 5 is installed inside the bearing housing 2. Through careful tolerance fit design, the wear-resistant bushing 5 forms a surface contact with the crankshaft. When the crankshaft is subjected to unbalanced force and shifts, its surface will contact the inner ring of the bearing. At this time, the inner ring will move with the crankshaft, thereby effectively suppressing and reducing the swing and shift of the crankshaft. At the same time, the gap between the bearing housing 2 and the wear-resistant bushing 5 and the internal cavity space work together to effectively reduce operating noise. In addition, the surface of the wear-resistant bushing 5 is coated with a wear-resistant coating 6. This coating works in conjunction with the optimized oil groove 4 design: as the crankshaft rotates, the oil is directly guided to the interface of the friction pair through the oil groove 4.

[0030] After the airflow is discharged from the gap between the crankshaft and the inner hole, it is then agitated by the high-speed rotating balls in the bearing housing 2 to reduce the noise during the airflow discharge.

[0031] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A CO2 automotive air conditioning compressor bearing contact type muffler cover, comprising a muffler cover body (1), characterized in that: The main body (1) of the muffler has an integrally formed bearing seat (2) at the center of the front. The inner hole of the bearing seat (2) accommodates a deep groove ball bearing (3) and is interference-fitted with the outer ring of the deep groove ball bearing (3). The inner wall of the bearing seat (2) has at least one oil groove (4) along the circumferential or axial direction. The bearing seat (2) is equipped with a wear-resistant bushing (5), and the surface of the wear-resistant bushing (5) is coated with a wear-resistant coating (6).

2. The CO2 automotive air conditioning compressor bearing contact type muffler cover according to claim 1, characterized in that, The surface edge of the muffler body (1) is provided with an outer ring threaded hole (7), and the surface center of the muffler body (1) is provided with an inner ring threaded hole (8).

3. The CO2 automotive air conditioning compressor bearing contact type muffler cover according to claim 1, characterized in that, An annular reinforcing block (9) is provided at the connection between the root of the bearing seat (2) and the main body of the muffler cover (1), and a placement groove is provided inside the annular reinforcing block (9).

4. The CO2 automotive air conditioning compressor bearing contact type muffler cover according to claim 3, characterized in that, The placement groove is equipped with reinforcing ribs (10), which are distributed in a ring shape inside the annular reinforcing block (9).

5. A CO2 automotive air conditioning compressor bearing contact type muffler cover according to claim 1, characterized in that, The bearing housing (2) and the wear-resistant bushing (5) are both provided with mounting grooves on one side of their surfaces. The mounting grooves are used to install temperature sensors that detect the surface temperature of the deep groove ball bearing (3).

6. The CO2 automotive air conditioning compressor bearing contact type muffler cover according to claim 1, characterized in that, The oil groove (4) is a set of axial straight grooves, and the main body (1) of the silencer cover is integrally formed by metal additive manufacturing process using high damping aluminum alloy material.

7. A CO2 automotive air conditioning compressor bearing contact type muffler cover according to claim 2, characterized in that, The outer ring threaded hole (7) is used to fix the external pump body and the housing, and the inner ring threaded hole (8) is used for the connection between the silencer cover body (1) and the external pump body.

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