Rotor compressor oil way structure and rotor compressor

Abstract

The invention belongs to the technical field of compressors, and discloses a rotor compressor oil way structure and a rotor compressor, the rotor compressor oil way structure is used for inputting lubricating oil into a lower air cylinder blade groove, the rotor compressor oil way structure comprises an oil collecting groove and an oil return channel, and the oil collecting groove is communicated with the oil return channel; a channel outlet is formed in the end, away from the oil collecting groove, of the oil return channel, the channel outlet is formed in one side of the lower air cylinder blade groove, and lubricating oil collected in the oil collecting groove is guided by the oil return channel to flow back to the lower air cylinder blade groove. According to the oil way structure of the rotor compressor, it can be guaranteed that sufficient lubricating oil enters the lower air cylinder blade groove, and the lubricating effect of the lower blade in the lower air cylinder blade groove is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a rotary compressor oil circuit structure and a rotary compressor. Background Art

[0002] Blade wear is the main cause of failure of rotary compressors. The traditional way to solve this problem is to open an oil guide hole on the cylinder. When the rotary compressor is running, the lubricating oil is discharged with the gas. After the oil and gas are separated, the lubricating oil flows through the motor channel, passes through the flow hole of the upper cylinder cover (located above the blade), and then flows to the cylinder blade groove. The lubricating oil is introduced into the cylinder blade groove to enhance the lubrication effect on the blade and reduce blade wear. For a two-cylinder compressor, since the blade position of the lower cylinder is consistent with the blade position of the upper cylinder, the lubricating oil is blocked by the upper cylinder when it flows back, and less lubricating oil flows to the blade groove of the lower cylinder. When the two-cylinder compressor is operating under low oil level conditions, the lower blade located in the blade groove of the lower cylinder is still prone to wear.

[0003] Therefore, there is an urgent need for a rotary compressor oil circuit structure and a rotary compressor to solve the above problems. Summary of the invention

[0004] One purpose of the present invention is to provide a rotor compressor oil circuit structure and a rotor compressor to ensure that sufficient lubricating oil enters the lower cylinder blade groove and improve the lubrication effect of the lower blade in the lower cylinder blade groove.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] In a first aspect, a rotor compressor oil circuit structure is provided, which is used to input lubricating oil to the lower cylinder blade groove. The rotor compressor oil circuit structure includes an oil collecting tank and an oil return channel. The oil collecting tank is connected to the oil return channel. The oil return channel is provided with a channel outlet at one end away from the oil collecting tank. The channel outlet is arranged on one side of the lower cylinder blade groove. The lubricating oil collected in the oil collecting tank is guided by the oil return channel to flow back to the lower cylinder blade groove.

[0007] As an optional technical solution, the channel outlet is configured to be trumpet-shaped.

[0008] As an optional technical solution, the oil collecting groove includes an inner oil collecting wall, the oil return channel includes an inner oil return wall, the inner oil collecting wall and the inner oil return wall are both arc-shaped, and the inner oil collecting wall and the inner oil return wall are smoothly transitionally connected.

[0009] As an optional technical solution, the center of the inner oil collecting wall overlaps with the center of the inner oil return wall.

[0010] As an optional technical solution, the oil collecting groove also includes an outer oil collecting wall, and the outer oil collecting wall and the inner oil collecting wall are radially spaced apart along the inner oil collecting wall, and the radial spacing distance between the outer oil collecting wall and the inner oil collecting wall along the inner oil collecting wall is a first preset value. The oil return channel also includes an outer oil return wall, and the outer oil return wall and the inner oil return wall are radially spaced apart along the inner oil return wall, and the radial spacing distance between the outer oil return wall and the inner oil return wall along the inner oil return wall is a second preset value, and the first preset value is greater than the second preset value.

[0011] As an optional technical solution, the rotary compressor oil circuit structure includes a plurality of oil collecting grooves, and two adjacent oil collecting grooves are connected through the oil return channel.

[0012] In a second aspect, a rotary compressor is provided, which includes an oil collecting plate, an intermediate plate, an upper cylinder and an upper cylinder cover, and the rotary compressor oil circuit structure as described above is arranged on any one of the oil collecting plate, the intermediate plate, the upper cylinder and the upper cylinder cover.

[0013] As an optional technical solution, the oil collecting plate is provided with the oil path structure of the rotor compressor, and the oil collecting plate is fixedly arranged on the intermediate plate or the upper cylinder.

[0014] As an optional technical solution, the oil collecting plate is further provided with a fixing hole, and a threaded fastener passes through the fixing hole to fix the oil collecting plate to the middle plate or the upper cylinder.

[0015] As an optional technical solution, the oil collecting plate is integrally formed with the middle plate or the upper cylinder.

[0016] The beneficial effects of the present invention are:

[0017] The present invention provides a rotary compressor oil circuit structure and a rotary compressor. The rotary compressor oil circuit structure is arranged on any one of an oil collecting plate, an intermediate plate, an upper cylinder and an upper cylinder cover. The rotary compressor oil circuit structure is used to input lubricating oil to the blade groove of the lower cylinder. The rotary compressor oil circuit structure includes an oil collecting tank and an oil return channel. The oil collecting tank is connected to the oil return channel. The end of the oil return channel away from the oil collecting tank is provided with a channel outlet. The channel outlet is arranged on one side of the blade groove of the lower cylinder. The lubricating oil collected in the oil collecting tank is guided by the oil return channel to flow back to the blade groove of the lower cylinder. In the present invention, the oil collecting tank corresponds to the oil return portion of the rotary compressor. The lubricating oil flows into the oil collecting tank from the oil return portion. The lubricating oil collected in the oil collecting tank is guided by the oil return channel to flow back to the blade groove of the lower cylinder, and the lower blade located in the blade groove of the lower cylinder is lubricated, thereby ensuring the lubrication effect of the lower blade in the blade groove of the lower cylinder, extending the service life of the rotary compressor oil circuit structure, the lower blade and the lower cylinder, and ensuring the working efficiency of the rotary compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described in detail below based on the accompanying drawings and embodiments;

[0019] Figure 1 is a cross-sectional view of the rotary compressor described in the embodiment;

[0020] Figure 2 is a schematic structural diagram of the intermediate plate described in the embodiment;

[0021] Figure 3 is another structural schematic diagram of the intermediate plate described in the embodiment;

[0022] Figure 4 is another structural schematic diagram of the middle plate described in the embodiment;

[0023] Figure 5 It is a structural schematic diagram of the upper cylinder described in the embodiment;

[0024] Figure 6 It is a structural schematic diagram of the upper cylinder cover described in the embodiment;

[0025] Figure 7 It is a schematic structural diagram of the oil collecting plate described in the embodiment.

[0026] In the figure:

[0027] 100, oil collecting plate; 200, middle plate; 300, upper cylinder; 400, upper cylinder cover;

[0028] 1. Oil collecting tank; 11. Inner oil collecting wall; 12. Outer oil collecting wall;

[0029] 2. Oil return channel; 21. Channel outlet; 22. Inner oil return wall; 23. Outer oil return wall; 24. Lubrication through hole; 25. Circulation hole;

[0030] 3. Lower cylinder blade groove. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0032] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] In the description herein, it should be understood that the terms "upper", "lower", "left", "right", etc., and the like, are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0035] In the description of this specification, the description with reference to the terms "an embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0036] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0037] Embodiment 1

[0038] like Figure 1 As shown, this embodiment provides a rotary compressor, which includes an oil collecting plate 100, an intermediate plate 200, an upper cylinder 300 and an upper cylinder cover 400, and the oil circuit structure of the rotary compressor is arranged on any one of the oil collecting plate 100, the intermediate plate 200, the upper cylinder 300 and the upper cylinder cover 400.

[0039] The rotor compressor of this embodiment is a two-cylinder compressor. In the two-cylinder compressor, the relative installation positions of the oil collecting plate 100, the middle plate 200, the upper cylinder 300, the upper cylinder cover 400, the upper blades, the lower cylinder, the lower cylinder cover and the lower blades can refer to the prior art, and will not be described one by one in this embodiment.

[0040] The rotary compressor oil circuit structure of this embodiment is also applicable to single-cylinder compressors and other multi-cylinder compressors.

[0041] like Figures 2 to 7 As shown, the rotor compressor oil circuit structure of this embodiment is used to input lubricating oil to the lower cylinder blade groove 3. The rotor compressor oil circuit structure includes an oil collecting tank 1 and an oil return channel 2. The oil collecting tank 1 is connected to the oil return channel 2. The oil return channel 2 is provided with a channel outlet 21 at one end away from the oil collecting tank 1. The channel outlet 21 is arranged on one side of the lower cylinder blade groove 3. The lubricating oil collected in the oil collecting tank 1 is guided by the oil return channel 2 to flow back to the lower cylinder blade groove 3.

[0042] Specifically, the oil collecting tank 1 corresponds to the oil return part of the rotary compressor, and the lubricating oil flows into the oil collecting tank 1 from the oil return part. The lubricating oil collected in the oil collecting tank 1 is guided by the oil return channel 2 to flow back to the lower cylinder blade groove 3, and lubricates the lower blades located in the lower cylinder blade groove 3, thereby ensuring the lubrication effect of the lower blades in the lower cylinder blade groove 3, extending the service life of the rotary compressor oil circuit structure, the lower blades and the lower cylinder, and ensuring the working efficiency of the rotary compressor.

[0043] Optionally, the channel outlet 21 is set to be trumpet-shaped. The end of the return oil channel 2 close to the oil collecting tank 1 is the channel entrance, and the opening area of ​​the channel entrance is smaller than the opening area of ​​the channel outlet 21. The cross-sectional area of ​​the return oil channel 2 gradually decreases along the direction from the oil collecting tank 1 to the lower cylinder blade groove 3. The flow resistance of the lubricating oil along the direction from the oil collecting tank 1 to the lower cylinder blade groove 3 is smaller than the flow resistance of the lubricating oil along the direction from the lower cylinder blade groove 3 to the oil collecting tank 1. Therefore, setting the channel outlet 21 to be trumpet-shaped is more conducive to the lubricating oil leaving the return oil channel 2 and entering the lower cylinder blade groove 3.

[0044] Optionally, the oil collecting groove 1 includes an inner oil collecting wall 11, and the oil return channel 2 includes an inner oil return wall 22. The inner oil collecting wall 11 and the inner oil return wall 22 are both arc-shaped, and the inner oil collecting wall 11 and the inner oil return wall 22 are smoothly transitionally connected to improve the fluidity of the lubricating oil in the inner oil collecting wall 11 and the inner oil return wall 22.

[0045] Optionally, the center of the inner oil collecting wall 11 overlaps with the center of the inner oil returning wall 22 .

[0046] Optionally, the oil collecting tank 1 also includes an outer oil collecting wall 12, which is radially spaced apart from the inner oil collecting wall 11 along the inner oil collecting wall 11, and the radial spacing distance between the outer oil collecting wall 12 and the inner oil collecting wall 11 along the inner oil collecting wall 11 is a first preset value. The oil return channel 2 also includes an outer oil return wall 23, which is radially spaced apart from the inner oil return wall 22 along the inner oil return wall 22, and the radial spacing distance between the outer oil return wall 23 and the inner oil return wall 22 along the inner oil return wall 22 is a second preset value, and the first preset value is greater than the second preset value.

[0047] In this embodiment, the radial spacing distance between the outer oil collecting wall 12 and the inner oil collecting wall 11 along the inner oil collecting wall 11 is expanded to a first preset value to improve the storage capacity of the oil collecting tank 1, and the radial spacing distance between the outer oil return wall 23 and the inner oil return wall 22 along the inner oil return wall 22 is set to a second preset value, and the first preset value is made greater than the second preset value, so that a misalignment is formed between the oil collecting tank 1 and the oil return channel 2, thereby preventing the oil return channel 2 from draining the lubricating oil in the oil collecting tank 1 at one time.

[0048] Optionally, the oil circuit structure of the rotary compressor includes a plurality of oil collecting grooves 1, and two adjacent oil collecting grooves 1 are connected via an oil return channel 2. Providing a plurality of oil collecting grooves 1 can increase the storage capacity of lubricating oil for backup.

[0049] Embodiment 2

[0050] like Figure 2 As shown, in this embodiment, the rotor compressor oil circuit structure is arranged on the middle plate 200, the middle plate 200 is provided with an oil collecting groove 1 and an oil return channel 2, the lower cylinder blade groove 3 is located on one side of the channel outlet 21, and the lubricating oil flows out of the channel outlet 21 and directly enters the lower cylinder blade groove 3.

[0051] like Figure 3 As shown, in some other embodiments, the middle plate 200 is provided with two oil collecting grooves 1 and two oil return channels 2, and the middle plate 200 is provided with a lubrication through hole 24, the lubrication through hole 24 is located between the two oil return channels 2, and the lubrication through hole 24 is located directly above the lower cylinder blade groove 3, the two oil collecting grooves 1 collect lubricating oil at the same time, so that the storage capacity of lubricating oil is larger, and the lubricating oil returning from the two oil return channels 2 is injected into the lubrication through hole 24, and the lubricating oil passes through the lubrication through hole 24 and enters the lower cylinder blade groove 3.

[0052] like Figure 4As shown, in some other embodiments, the middle plate 200 is provided with three oil collecting grooves 1 and three oil return channels 2, and the middle plate 200 is provided with a lubricating through hole 24, the lubricating through hole 24 is located between two of the oil return channels 2, and the other oil return channel 2 is connected to two adjacent oil collecting grooves 1, and the three oil collecting grooves 1 collect lubricating oil at the same time, so that the storage capacity of lubricating oil is larger, and the lubricating oil returning from the two oil return channels 2 is injected into the lubricating through hole 24, and the lubricating oil passes through the lubricating through hole 24 and enters the lower cylinder blade groove 3.

[0053] Embodiment 3

[0054] like Figure 5 As shown, in this embodiment, the oil circuit structure of the rotor compressor is arranged in the upper cylinder 300, the upper cylinder blade groove is directly opposite to the lower cylinder blade groove 3, and the lubricating oil passes through the oil collecting groove 1, the return oil channel 2, the upper cylinder blade groove and the lower cylinder blade groove 3 in sequence. The lubricating oil lubricates the upper blades in the upper cylinder blade groove, and the lubricating oil lubricates the lower blades in the lower cylinder blade groove 3.

[0055] Embodiment 4:

[0056] like Figure 7 As shown, in this embodiment, the oil circuit structure of the rotary compressor is arranged on the oil collecting plate 100, and the oil collecting plate 100 is fixedly arranged on the middle plate 200 or the upper cylinder 300. The channel outlet 21 of the oil collecting plate 100 is located on one side of the blade groove 3 of the lower cylinder, and the oil collecting plate 100 guides the lubricating oil into the blade groove 3 of the lower cylinder, thereby lubricating the lower blade.

[0057] Optionally, the oil collecting plate 100 is further provided with a fixing hole, and a threaded fastener passes through the fixing hole to fix the oil collecting plate 100 to the middle plate 200 or the upper cylinder 300 .

[0058] Optionally, the oil collecting plate 100 is integrally formed with the middle plate 200 or the upper cylinder 300 to simplify the processing procedure and efficiency while improving the structural strength.

[0059] Embodiment 5

[0060] like Figure 6 As shown, in this embodiment, the oil circuit structure of the rotary compressor is arranged on the upper cylinder head 400, and the upper cylinder head 400 is provided with a flow hole 25, and the flow hole 25 is located directly above the lower cylinder blade groove 3. The lubricating oil enters the flow hole 25 from the return oil channel 2 and then enters the lower cylinder blade groove 3, thereby lubricating the lower blade.

[0061] In addition, the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may also include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A rotor compressor oil circuit structure for inputting lubricating oil into the lower cylinder blade groove (3), characterized in that: The oil circuit structure of the rotary compressor comprises an oil collecting groove (1) and an oil return channel (2); the oil collecting groove (1) is connected to the oil return channel (2); an end of the oil return channel (2) away from the oil collecting groove (1) is provided with a channel outlet (21); the channel outlet (21) is arranged on one side of the lower cylinder blade groove (3); the lubricating oil collected in the oil collecting groove (1) is guided by the oil return channel (2) to flow back to the lower cylinder blade groove (3).

2. The rotary compressor oil circuit structure according to claim 1, characterized in that: The channel outlet (21) is configured to be trumpet-shaped.

3. The rotary compressor oil circuit structure according to claim 1, characterized in that: The oil collecting groove (1) comprises an inner oil collecting wall (11), and the oil return channel (2) comprises an inner oil return wall (22). The inner oil collecting wall (11) and the inner oil return wall (22) are both arc-shaped, and the inner oil collecting wall (11) and the inner oil return wall (22) are smoothly transitionally connected.

4. The rotary compressor oil circuit structure according to claim 3, characterized in that: The center of the inner oil collecting wall (11) overlaps with the center of the inner oil returning wall (22).

5. The rotary compressor oil circuit structure according to claim 3, characterized in that: The oil collecting groove (1) further comprises an outer oil collecting wall (12), the outer oil collecting wall (12) and the inner oil collecting wall (11) are arranged at a radial interval along the inner oil collecting wall (11), and the radial interval between the outer oil collecting wall (12) and the inner oil collecting wall (11) along the inner oil collecting wall (11) is a first preset value. The oil return channel (2) further comprises an outer oil return wall (23), the outer oil return wall (23) and the inner oil return wall (22) are arranged at a radial interval along the inner oil return wall (22), and the radial interval between the outer oil return wall (23) and the inner oil return wall (22) along the inner oil return wall (22) is a second preset value, and the first preset value is greater than the second preset value.

6. The rotary compressor oil circuit structure according to any one of claims 1 to 5, characterized in that: The rotary compressor oil circuit structure comprises a plurality of oil collecting grooves (1), and two adjacent oil collecting grooves (1) are connected via the oil return channel (2).

7. A rotary compressor, characterized in that: The rotary compressor comprises an oil collecting plate (100), an intermediate plate (200), an upper cylinder (300) and an upper cylinder cover (400), and the rotary compressor oil circuit structure according to any one of claims 1 to 6 is arranged on any one of the oil collecting plate (100), the intermediate plate (200), the upper cylinder (300) and the upper cylinder cover (400).

8. The rotary compressor according to claim 7, characterized in that: The oil collecting plate (100) is provided with the oil path structure of the rotor compressor, and the oil collecting plate (100) is fixedly arranged on the middle plate (200) or the upper cylinder (300).

9. The rotary compressor according to claim 8, characterized in that: The oil collecting plate (100) is also provided with a fixing hole, and a threaded fastener passes through the fixing hole to fix the oil collecting plate (100) to the middle plate (200) or the upper cylinder (300).

10. The rotary compressor according to claim 8, characterized in that: The oil collecting plate (100) is integrally formed with the intermediate plate (200) or the upper cylinder (300).

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