A bottom bearing oil return structure of a scroll compressor

Abstract

The utility model discloses a scroll compressor bottom bearing oil return structure, including base, the top of base is installed with shell, one side of shell is provided with cover body, the outside of main bearing is installed with support disc cavity, the bottom of shell inside is installed with bottom bearing, and the oil passing structure includes the crankshaft of installing in the bottom of main bearing, and one end of crankshaft is provided with first oil hole, and the bottom of crankshaft is provided with second oil hole. The utility model discloses a crankshaft is installed in the bottom of main bearing, and the top of crankshaft is provided with first oil hole, and the bottom of crankshaft is provided with second oil hole, and first oil hole is linked together with support disc cavity, and support disc cavity has a large amount of lubricating oil, and this lubricating oil can be transported to bottom bearing through second oil hole owing to the pressure produced when the device works, can realize the lubrication of bottom bearing like this, can better lubricate, strengthens the lubrication of bottom bearing, improves the compressor life, to reach the purpose that scroll compressor bottom bearing oil return structure is convenient to oil return lubrication like this.

Description

Technical Field

[0001] This utility model relates to the field of scroll compressor technology, and in particular to a scroll compressor bottom bearing oil return structure. Background Technology

[0002] A scroll compressor is a fluid machine that uses volumetric changes to compress gas. Its main motion is that the moving scroll, driven by the rotor, makes a planar motion with a very small radius around the center of the base circle of the stationary scroll. Low-temperature refrigerant is drawn in through the intake port, compressed, and then discharged through the exhaust port as high-pressure refrigerant. The rotor is fixed in the support plate and connected by bearings. Due to the unreasonable structure of the bottom bearing of previous compressors, an oil return system for the bottom bearing of the scroll compressor is proposed. This system can improve the lubrication of the bottom bearing, reduce friction and abnormal noise, and improve the service life and overall stability of the scroll compressor.

[0003] The current scroll compressor bottom bearing oil return structure can basically meet people's usage needs, but there are still some problems, as follows: The unreasonable structure of the bottom bearing of the previous compressor often caused problems such as abnormal bearing noise and vibration at the compressor's highest speed, scroll wear, and high frictional power consumption. Utility Model Content

[0004] The purpose of this invention is to provide a scroll compressor bottom bearing oil return structure to solve the problem of difficulty in oil return in existing scroll compressor bottom bearing oil return structures.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a bottom bearing oil return structure for a scroll compressor, including a base; The base has a housing installed at its top, a cover on one side of the housing, an installation plate installed at the top inside the housing, and a stationary plate installed at the bottom of the installation plate. A moving disc is installed inside the stationary disc, a main bearing is installed at the bottom of the moving disc, a support disc cavity is installed on the outside of the main bearing, and a bottom bearing is installed at the bottom of the inner shell. The bottom end of the main bearing is equipped with an oil passage structure, which includes a crankshaft installed at the bottom end of the main bearing. One end of the crankshaft is provided with a first oil hole, and the bottom end of the crankshaft is provided with a second oil hole.

[0006] In use, a first oil hole is provided at the top of the crankshaft, and a second oil hole is provided at the bottom of the crankshaft. The first oil hole is connected to the support plate cavity, which contains a large amount of lubricating oil. Due to the pressure generated when the device is working, this lubricating oil is delivered to the bottom bearing through the second oil hole. This can achieve lubrication of the bottom bearing, which can better lubricate and improve the life of the compressor.

[0007] Furthermore, a slot is provided on one side of the outer shell, and a locking block is provided on one side of the cover. The outer shell and the cover form a locking structure, which facilitates disassembly.

[0008] Furthermore, an anti-corrosion structure is installed on the outer side of the outer casing. The anti-corrosion structure includes an anti-rust coating disposed on the outer side of the outer casing, and an anti-rust layer is installed on the inner side of the anti-rust coating. The anti-corrosion structure can enhance the corrosion resistance of the outer casing.

[0009] Furthermore, a wear-resistant layer is provided on the inner side of the anti-rust layer. The outer diameter of the wear-resistant layer is smaller than the inner diameter of the anti-rust layer, and the wear-resistant layer can enhance the wear resistance of the outer shell.

[0010] Furthermore, a disassembly and assembly structure is installed on the outer side of the cover. The disassembly and assembly structure includes a fixing plate installed on the outer side of the cover. A threaded groove is installed on one side of the fixing plate, and a fixing screw passes through the inside of the threaded groove. The disassembly and assembly structure can fix the cover.

[0011] Furthermore, the outer side wall of the fixing screw is uniformly provided with external threads, and the inner side wall of the threaded groove is uniformly provided with internal threads that cooperate with the external threads. The fixing screw and the threaded groove are threadedly connected, and the fixing screw can fix the cover.

[0012] Furthermore, the fixing screws are arranged in a ring, and are equally spaced on the outside of the cover. The fixing screws can be screwed into the threaded groove.

[0013] The advantages of the scroll compressor bottom bearing oil return structure provided by this utility model are: the oil return effect can be enhanced through the oil return structure, which can better lubricate and improve the lubrication of the bottom bearing, thereby increasing the compressor life; the corrosion resistance of the outer shell can be enhanced through the anti-corrosion structure; and the cover and outer shell can be disassembled and assembled through the disassembly and assembly structure.

[0014] By installing a crankshaft at the bottom of the main bearing, with a first oil hole at the top and a second oil hole at the bottom, the first oil hole is connected to the support plate cavity, which contains a large amount of lubricating oil. This lubricating oil is delivered to the bottom bearing through the second oil hole due to the pressure generated during the operation of the device. This method can achieve better lubrication of the bottom bearing, enhance the lubrication of the bottom bearing, and improve the life of the compressor. This achieves the purpose of facilitating oil return lubrication in the bottom bearing oil return structure of the scroll compressor. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the present invention; Figure 3 For the present utility model Figure 1 Enlarged cross-sectional view of point A in the middle section; Figure 4 This is a partial three-dimensional structural diagram of the oil-permeable structure of this utility model; Figure 5 This is a partial front view schematic diagram of the anti-corrosion structure of this utility model.

[0016] The reference numerals in the diagram are as follows: 1. Outer shell; 2. Cover; 3. Base; 4. Disassembly structure; 401. Fixing screw; 402. Fixing plate; 403. Threaded groove; 5. Mounting plate; 6. Stationary disc; 7. Moving disc; 8. Support disc cavity; 9. Main bearing; 10. Bottom bearing; 11. Oil passage structure; 1101. Crankshaft; 1102. First oil hole; 1103. Second oil hole; 12. Anti-corrosion structure; 1201. Anti-rust coating; 1202. Anti-rust layer; 1203. Wear-resistant layer. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figures 1-5 One embodiment of this utility model is a scroll compressor bottom bearing oil return structure, including a base 3.

[0019] The top of the base 3 is fitted with a housing 1. A slot is provided on one side of the housing 1, and a locking block is provided on one side of the cover 2. The housing 1 and the cover 2 form a locking structure.

[0020] The outer side of the outer casing 1 is equipped with an anti-corrosion structure 12. The anti-corrosion structure 12 includes an anti-rust coating 1201 disposed on the outer side of the outer casing 1, an anti-rust layer 1202 disposed on the inner side of the anti-rust coating 1201, and a wear-resistant layer 1203 disposed on the inner side of the anti-rust layer 1202. The outer diameter of the wear-resistant layer 1203 is smaller than the inner diameter of the anti-rust layer 1202.

[0021] See attached document Figure 5As shown, both the outer shell 1 and the cover 2 are provided with a wear-resistant layer 1203. The wear-resistant layer 1203 is also covered with a rust-proof layer 1202. The rust-proof layer 1202 is then sprayed with a rust-proof coating 1201. The wear-resistant layer 1203 can be made of nickel-based alloy material, which has high hardness. The rust-proof layer 1202 forms a zinc layer on the surface of the outer shell 1 through processes such as hot-dip galvanizing and electro-galvanizing. Zinc will generate a dense protective film of zinc oxide and zinc hydroxide in the air, preventing the internal substrate from rusting. The rust-proof coating 1201 uses epoxy resin as the main film-forming substance, with added rust-proof pigments and curing agents. After curing, the coating has strong adhesion and excellent chemical corrosion resistance. It can resist moisture, carbon dioxide and slightly acidic and alkaline environments in the air. Moreover, the coating is tough and not easy to crack, making it suitable as the bottom rust-proof coating 1201 to provide long-term corrosion protection for the outer shell 1.

[0022] A cover 2 is provided on one side of the outer shell 1. A disassembly structure 4 is installed on the outside of the cover 2. The disassembly structure 4 includes a fixing plate 402 installed on the outside of the cover 2. A threaded groove 403 is installed on one side of the fixing plate 402. A fixing screw 401 passes through the inside of the threaded groove 403. The fixing screws 401 are distributed in a ring and are arranged at equal intervals on the outside of the cover 2.

[0023] The outer side wall of the fixing screw 401 is uniformly provided with external threads, and the inner side wall of the threaded groove 403 is uniformly provided with internal threads that cooperate with the external threads. The fixing screw 401 and the threaded groove 403 are threadedly connected.

[0024] See attached document Figure 1-3 As shown, the cover 2 and the outer shell 1 have a snap-fit ​​structure. The cover 2 can be snapped onto the outer shell 1. Then, the fixing screw 401 can pass through the fixing plate 402 on the cover 2 and then screw the fixing screw 401 into the threaded groove 403 on the outer shell 1. After the fixing screw 401 is screwed into the threaded groove 403, the cover 2 and the outer shell 1 can be fixed together. When it is necessary to disassemble the cover 2, the fixing screw 401 can be unscrewed and the cover 2 can be disassembled.

[0025] An installation plate 5 is installed at the top of the interior of the outer casing 1, and a static plate 6 is installed at the bottom of the installation plate 5.

[0026] The stationary disk 6 has a moving disk 7 installed inside, the bottom of the moving disk 7 has a main bearing 9 installed, the outside of the main bearing 9 has a support disk cavity 8 installed, and the bottom bearing 10 is installed inside the outer casing 1 at the bottom.

[0027] An oil passage structure 11 is installed at the bottom of the main bearing 9. The oil passage structure 11 includes a crankshaft 1101 installed at the bottom of the main bearing 9. A first oil hole 1102 is provided at one end of the crankshaft 1101, and a second oil hole 1103 is provided at the bottom of the crankshaft 1101.

[0028] See attached document Figure 2and attached Figure 4 As shown, a first oil hole 1102 is provided at the top of the crankshaft 1101, and a second oil hole 1103 is provided at the bottom of the crankshaft 1101. The first oil hole 1102 is connected to the support plate cavity 8. The support plate cavity 8 contains a large amount of lubricating oil. Due to the pressure generated when the device is working, this lubricating oil will be transported to the bottom bearing 10 through the second oil hole 1103. This can achieve lubrication of the bottom bearing 10, which can better lubricate and improve the lubrication of the bottom bearing 10, thereby increasing the life of the compressor.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A bottom bearing oil return structure for a scroll compressor, comprising a base (3); Its features are: The top of the base (3) is fitted with a shell (1), a cover (2) is provided on one side of the shell (1), an installation plate (5) is installed inside the shell (1), and a stationary plate (6) is installed at the bottom of the installation plate (5). The stationary disk (6) has a moving disk (7) installed inside, the bottom end of the moving disk (7) has a main bearing (9) installed, the outside of the main bearing (9) has a support disk cavity (8) installed, and the bottom end of the outer shell (1) has a bottom bearing (10). The bottom end of the main bearing (9) is equipped with an oil passage structure (11). The oil passage structure (11) includes a crankshaft (1101) installed at the bottom end of the main bearing (9). One end of the crankshaft (1101) is provided with a first oil hole (1102), and the bottom end of the crankshaft (1101) is provided with a second oil hole (1103).

2. The scroll compressor bottom bearing oil return structure according to claim 1, characterized in that: The outer shell (1) has a slot on one side, and the cover (2) has a block on one side. The outer shell (1) and the cover (2) form a locking structure.

3. The scroll compressor bottom bearing oil return structure according to claim 1, characterized in that: The outer side of the outer shell (1) is provided with an anti-corrosion structure (12), the anti-corrosion structure (12) includes an anti-rust coating (1201) disposed on the outer side of the outer shell (1), and an anti-rust layer (1202) is installed on the inner side of the anti-rust coating (1201).

4. The scroll compressor bottom bearing oil return structure according to claim 3, characterized in that: The inner side of the anti-rust layer (1202) is provided with a wear-resistant layer (1203), and the outer diameter of the wear-resistant layer (1203) is smaller than the inner diameter of the anti-rust layer (1202).

5. The scroll compressor bottom bearing oil return structure according to claim 1, characterized in that: The outer side of the cover (2) is equipped with a disassembly structure (4), which includes a fixing plate (402) installed on the outer side of the cover (2). A threaded groove (403) is installed on one side of the fixing plate (402), and a fixing screw (401) passes through the inside of the threaded groove (403).

6. The scroll compressor bottom bearing oil return structure according to claim 5, characterized in that: The outer side wall of the fixing screw (401) is uniformly provided with external threads, and the inner side wall of the threaded groove (403) is uniformly provided with internal threads that cooperate with the external threads. The fixing screw (401) and the threaded groove (403) are threadedly connected.

7. The scroll compressor bottom bearing oil return structure according to claim 5, characterized in that: The fixing screws (401) are arranged in a ring, and the fixing screws (401) are arranged at equal intervals on the outside of the cover (2).

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