Oil passage structure and rotary compressor

Abstract

The utility model relates to the technical field of compressors, and discloses an oil passage structure and a rotary compressor. The fixing part is arranged on the peripheral wall of the base, the fixing part is provided with a first side wall and a second side wall which are spaced in the circumferential direction of the base, the adjacent first side wall and second side wall are spaced in the circumferential direction of the base to form an avoiding gap, and the avoiding gap is located on the outer side of the fixing part; connecting parts are arranged in the avoiding gaps and connected between the corresponding first side walls and the corresponding second side walls, the connecting parts and the base are spaced in the radial direction of the base to form oil passing channels, at least one connecting part is provided with an oil return notch in the end wall in the axial direction of the base, and the oil return notches extend in the axial direction of the base so that the length size of the oil passing channels can be reduced. Therefore, the length size of the oil passing channel is reduced through the oil return notch, the flowing speed of lubricating oil in the oil passing channel can be increased, and therefore the accumulation amount of the lubricating oil above the oil channel structure can be reduced in an accelerated mode.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to an oil passage structure and a rotary compressor with the same. BACKGROUND

[0002] The discharge port of the rotary compressor is located at the top of the casing of the rotary compressor. After the motor driving core of the rotary compressor sucks the medium, the medium is mixed with the lubricating oil sucked by the core. After the mixture flows towards the discharge port and is discharged from the core, the mixture is re-separated into medium and lubricating oil under the action of the lubricating oil separator. The medium continues to flow towards the discharge port to be discharged to the outside of the casing, and the lubricating oil flows back along the inner wall of the casing under the action of its own gravity until it flows to the bottom oil storage area of the rotary compressor.

[0003] At present, in the core assembly of the existing rotary compressor, the outer side of the core assembly is provided with a fixed part fixedly connected with the inner wall of the casing. The fixed part is provided with an oil passage through the fixed part in the axial direction of the core assembly, and the lubricating oil passes through the motor or the core from the oil passage. Since the flow speed of the lubricating oil in the oil passage is inversely related to the length of the oil passage, the thickness size of the fixed part is associated with the axial size of the motor or the core. If the thickness size of the fixed part is too large, it will be difficult for the lubricating oil to pass through the motor or the core, which will cause the lubricating oil to accumulate above the motor or the core. The separated lubricating oil cannot flow back to the bottom oil storage area of the rotary compressor in time, which will cause the separated lubricating oil to be more easily discharged to the outside of the rotary compressor, and will also cause the lack of lubrication of the parts in the rotary compressor, thereby reducing the working reliability of the rotary compressor. Utility model content

[0004] The purpose of the present application is to improve the flow speed of the lubricating oil in the oil passage, thereby accelerating and reducing the amount of lubricating oil accumulated above the motor or the core, thereby reducing the lubricating oil discharged to the outside of the rotary compressor, and fully lubricating the parts in the rotary compressor.

[0005] In order to achieve the above purpose, the present application provides an oil passage structure.

[0006] The present application further provides a rotary compressor.

[0007] According to the oil passage structure of the present application, the oil passage structure is suitable for a core assembly of a rotary compressor, the rotary compressor further comprises a shell, the core assembly is arranged in the shell, and the oil passage structure comprises a base, a fixing portion arranged on an outer circumferential wall of the base, the fixing portion is used for being connected and matched with the shell, the fixing portion has a first side wall and a second side wall which are spaced apart along the circumference of the base, adjacent first side walls and second side walls are spaced apart to form a clearance gap along the circumference of the base, and the clearance gap is located on the outer side of the fixing portion; the clearance gap is configured as an oil passage, or a connecting portion is arranged in the clearance gap, the connecting portion is connected between the corresponding first side wall and the second side wall, the connecting portion is spaced apart from the base along the radial direction of the base to form an oil passage, and at least one end wall of the connecting portion along the axial direction of the base is provided with an oil return gap which is arranged in the axial direction of the base to reduce the length of the oil passage.

[0008] According to the oil passage structure of the present application, by arranging the oil return gap on the connecting portion to reduce the length of the oil passage, the flow speed of the lubricating oil in the oil passage can be improved, compared with the prior art, when the oil passage structure is arranged on the core assembly of the rotary compressor, the accumulation of the lubricating oil on the motor or the core of the core assembly can be reduced, so that the lubricating oil can flow back to the bottom oil storage area of the rotary compressor in time, thereby reducing the lubricating oil discharged to the outside of the rotary compressor, and ensuring that each component in the rotary compressor is fully lubricated, thereby improving the working reliability of the rotary compressor.

[0009] In some examples of the present application, the base is provided with a plurality of fixing portions which are arranged spaced apart along the circumference of the base, and the connecting portion is arranged between any two adjacent fixing portions.

[0010] In some examples of the present application, each connecting portion is provided with the oil return gap.

[0011] In some examples of the present application, one side end wall of the connecting portion is provided with the oil return gap along the axial direction of the base, or both side end walls of the connecting portion are provided with the oil return gap.

[0012] In some examples of the present application, the thickness of the connecting portion provided with the oil return gap is L, the thickness of the outer circumferential wall of the base opposite to the oil passage is H, and L and H satisfy the relationship: 0≤L / H<1.

[0013] In some examples of the present application, the cross-sectional area of the oil passage gradually decreases in the oil return direction of the lubricating oil.

[0014] In some examples of the present application, the maximum radial dimension of the oil passage is D1, the minimum radial dimension of the oil passage is D2, and the average radial dimension of the oil passage is D3, D1, D2 and D3 satisfy the relationship: D1*D2≥0.5D3 2 wherein D1>D3>D2.

[0015] The rotary compressor according to the present application comprises a casing defining a mounting space; a core assembly installed in the casing, the core assembly having an oil passage structure, the oil passage structure being the oil passage structure described above.

[0016] The rotary compressor according to the present application is provided with a core assembly having an oil passage structure, by providing an oil return gap on the connecting portion of the oil passage structure to reduce the length dimension of the oil passage, the flow speed of the lubricating oil in the oil passage can be improved, compared with the prior art, the accumulation amount of the lubricating oil above the motor or the core of the core assembly can be reduced, so that the lubricating oil can flow back to the bottom oil storage area of the rotary compressor in time, thereby reducing the lubricating oil discharged to the outside of the rotary compressor, and ensuring that each component in the rotary compressor is fully lubricated, improving the working reliability of the rotary compressor.

[0017] In some examples of the present application, the core assembly comprises a motor, the motor comprising a stator and a rotor, the stator being sleeved outside the rotor, an output end of the rotor being in transmission connection with the core, the stator being configured as the base.

[0018] In some examples of the present application, the core assembly comprises a core, the core comprising a cylinder and a flange, along the axial direction of the core assembly, the flange being installed at an end of the cylinder, the flange being configured as the base. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a sectional view of the core assembly of the embodiment of the present application;

[0020] Figure 2 is a sectional view of the rotary compressor of the embodiment of the present application;

[0021] Figure 3 is a top view of the flange of the embodiment of the present application;

[0022] Figure 4 is a top view of the flange of the embodiment of the present application after the connecting portion is removed;

[0023] Figure 5 is a sectional view of the first embodiment of the flange of the embodiment of the present application;

[0024] Figure 6 is a sectional view of a second embodiment of the flange piece of the present application;

[0025] Figure 7 is a sectional view of a third embodiment of the flange piece of the present application;

[0026] Figure 8 is a sectional view of a fourth embodiment of the flange piece of the present application;

[0027] Figure 9 is a sectional view of a fifth embodiment of the flange piece of the present application.

[0028] In the figure, 100, rotary compressor; 110, casing; 200, core assembly;

[0029] 1, motor; 11, stator; 12, rotor;

[0030] 2, core; 21, crankshaft; 22, cylinder; 23, piston; 24, flange piece; 241, upper flange piece; 242, lower flange piece;

[0031] 3, fixed part; 31, first side wall; 32, second side wall; 33, avoiding gap;

[0032] 4, connecting part; 41, oil passage; 42, oil return gap. DETAILED DESCRIPTION

[0033] The specific embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present application, but not to limit the scope of the present application.

[0034] As shown in Figures 1-9 , the present application discloses an oil passage structure and a rotary compressor 100, wherein the oil passage structure is suitable for a core assembly 200 of the rotary compressor 100, the rotary compressor 100 can be a sliding vane compressor, a scroll compressor or a rotary compressor, etc., the rotary compressor 100 further comprises a casing 110, the core assembly 200 is arranged in the casing 110, the core assembly 200 is used to suck medium into the rotary compressor 100, then the core assembly 200 compresses and discharges the medium out of the rotary compressor 100, the medium can be air or refrigerant, etc., the rotary compressor 100 can be installed in various types of gas systems or refrigeration systems of air conditioners.

[0035] As shown in Figures 1-9As shown, the oil passage structure according to the embodiment of the present application comprises a base (not shown in the figure) and a fixing portion 3. The fixing portion 3 is arranged on the peripheral wall of the base. When the oil passage structure is applied to the movement assembly 200, the movement assembly 200 comprises the motor 1 and the movement 2, and the stator 11 of the motor 1 and / or the flange 24 of the movement 2 can be configured as the base. As shown in the figure, Figure 1 , Figure 3 As shown, the oil passage structure according to the embodiment of the present application comprises a base (not shown in the figure) and a fixing portion 3. The fixing portion 3 is arranged on the peripheral wall of the base. When the oil passage structure is applied to the movement assembly 200, the movement assembly 200 comprises the motor 1 and the movement 2, and the stator 11 of the motor 1 and / or the flange 24 of the movement 2 can be configured as the base. As shown in the figure,

[0036] As shown in the figure, Figure 4 The fixing portion 3 has a first side wall 31 and a second side wall 32 which are spaced apart along the circumference of the base. Adjacent first side wall 31 and second side wall 32 are spaced apart along the circumference of the base to form a clearance gap 33 on the outside of the fixing portion 3. When the fixing portion 3 is one, the adjacent first side wall 31 and second side wall 32 are the first side wall 31 and the second side wall 32 of the fixing portion 3. When the fixing portion 3 is multiple, the adjacent first side wall 31 and second side wall 32 are the first side wall 31 of one of the adjacent two fixing portions 3 and the second side wall 32 of the other.

[0037] As shown in the figure, Figure 4 , Figure 8 The clearance gap 33 is configured as an oil passage 41, or as shown in the figure, Figure 3 The clearance gap 33 is provided with a connecting portion 4 connected between the corresponding first side wall 31 and second side wall 32 to support the corresponding fixing portion 3. The connecting portion 4 can improve the structural strength of the fixing portion 3, so as to prevent the fixing seat from being twisted and deformed as much as possible. The connecting portion 4 is spaced apart from the base along the radial direction of the base to form an oil passage 41, and the lubricating oil can pass through the oil passage 41 from the base, so as to smoothly flow back to the bottom oil storage area of the casing 110.

[0038] At least one connecting portion 4 is provided with an oil return gap 42 on the end wall in the axial direction of the base. It should be noted that the axial direction of the base is the same as the axial direction of the movement assembly 200, and the axial direction of the movement assembly 200 can refer to the up-down direction in the figure. Figure 1 It can be understood that the connecting portion 4 corresponding to the base is provided with an oil return gap 42, which extends along the axial direction of the base, and the oil return gap 42 extends from the corresponding first side wall 31 to the second side wall 32 along the circumference of the base to reduce the length of the oil passage 41. Specifically, the oil return gap 42 can reduce the thickness of the connecting portion 4, and the thickness direction of the connecting portion 4 is the same as the axial direction of the base, that is, the thickness direction of the connecting portion 4 refersFigure 1 The oil return gap 42 can make the connecting portion 4 lack part of the side wall of the oil passage 41, so as to reduce the length dimension of the oil passage 41. The energy loss Δp of the lubricating oil in the oil passage 41 satisfies the relationship: Δp = λLρv 2 / 2d, wherein λ is the resistance coefficient in the oil passage 41, L is the length dimension of the oil passage 41, ρ is the density of the lubricating oil, v is the flow rate of the lubricating oil, and d is the flow diameter of the oil passage 41. According to the above formula, by reducing the length dimension of the oil passage 41, the energy loss of the lubricating oil in the oil passage 41 can be reduced, so as to accelerate the return flow rate of the lubricating oil.

[0039] Therefore, by arranging the oil return gap 42 on the connecting portion 4 to reduce the length dimension of the oil passage 41, the flow rate of the lubricating oil in the oil passage 41 can be improved. Compared with the prior art, when the oil passage structure is arranged on the core assembly 200 of the rotary compressor 100, the accumulation amount of the lubricating oil above the motor 1 or the core 2 of the core assembly 200 can be reduced, so that the lubricating oil can flow back to the bottom oil storage area of the rotary compressor 100 in time, thereby reducing the lubricating oil discharged to the outside of the rotary compressor 100, and ensuring that each component in the rotary compressor 100 is fully lubricated, thereby improving the working reliability of the rotary compressor 100.

[0040] As shown in Figure 3 In some embodiments of the present application, the base is provided with a plurality of fixing portions 3, and the plurality of fixing portions 3 are arranged at intervals along the circumference of the base, and the connecting portion 4 is connected between any two adjacent fixing portions 3. When the base is provided with a plurality of fixing portions 3, an avoiding gap 33 is formed between any two fixing portions 3, and the connecting portion 4 corresponding to the base is a plurality of connecting portions, that is, the oil passage 41 corresponding to the base is a plurality of oil passages. By increasing the number of oil passages 41, the oil return amount of the lubricating oil per unit time can be effectively increased.

[0041] In addition, when the base corresponds to a plurality of connecting portions 4, at least one connecting portion 4 is provided with an oil return gap 42, that is, the number of connecting portions 4 does not correspond to the number of oil return gaps 42. In some embodiments, part of the connecting portions 4 is provided with an oil return gap 42, and part of the connecting portions 4 is not provided with an oil return gap 42. In this way, the return flow rate of the lubricating oil in the liquid passage corresponding to the connecting portion 4 provided with the oil return gap 42 can be ensured to be accelerated, and the connecting portion 4 not provided with the oil return gap 42 can effectively support the fixing portion 3, so as to avoid the torsional deformation of the fixing portion 3 as much as possible.

[0042] In some other embodiments, each connection part 4 is provided with an oil return notch 42. This arrangement can increase the flow speed of the lubricating oil when it flows through each fluid passage, which can effectively improve the oil return speed of the lubricating oil in the housing 110.

[0043] like Figures 5-7 As shown, in some embodiments of this application, along the axial direction of the base, one side end wall of the connecting portion 4 may be provided with an oil return notch 42, or both end walls of the connecting portion 4 may be provided with oil return notches 42. For example, Figure 5 , Figure 6 As shown, when one side end wall of the connecting part 4 is provided with an oil return notch 42, the oil return notch 42 is located on the end wall of the connecting part 4 near the bottom oil storage area of ​​the housing 110. The end wall of the connecting part 4 near the bottom oil storage area of ​​the housing 110 can be referred to as... Figure 1 The lower end wall of the connecting part 4, or the oil return notch 42, is located on the end wall of the connecting part 4 away from the bottom oil storage area of ​​the housing 110. The end wall of the connecting part 4 away from the bottom oil storage area of ​​the housing 110 can refer to... Figure 1 The upper wall of the middle connecting part 4.

[0044] like Figure 7 As shown, placing the oil return notch 42 on both end walls of the connecting part 4 can reduce the length of the oil passage 41, thereby accelerating the return speed of the lubricating oil. In some preferred embodiments, the oil return notch 42 is located on the end wall of the connecting part 4 near the bottom oil storage area of ​​the housing 110. This arrangement can increase the space below the oil passage 41, thereby increasing the oil storage capacity below the stator 11 or the flange 24, and further reducing the accumulation of lubricating oil above the base.

[0045] In some specific embodiments of this application, when oil return gaps 42 are provided on both sides of the connecting part 4, the oil return gaps 42 on both sides of the connecting part 4 are the same size. However, this application is not limited to this. In other embodiments, the oil return gaps 42 on both sides of the connecting part 4 are different sizes.

[0046] like Figure 5 , Figure 8 As shown, in some embodiments of this application, the thickness of the connecting portion 4 with the oil return notch 42 is L, and the thickness of the outer peripheral wall of the base opposite to the oil passage 41 is H. L and H satisfy the relationship: 0 ≤ L / H < 1. The smaller the thickness L of the connecting portion 4 with the oil return notch 42, the smaller the length of the oil passage 41, and the faster the lubricating oil passes through the oil passage 41. In some embodiments, such as... Figure 8As shown, when the thickness L of the connecting part 4 with the return oil notch 42 is 0, the connecting part 4 is completely cut off by the return oil notch 42, and the lubricating oil can pass through the base through the clearance gap 33. The flow of the lubricating oil is less obstructed by the connecting part 4, thereby further increasing the flow speed of the lubricating oil through the base.

[0047] It should be noted that the specific thickness of the connecting part 4 with the oil return notch 42 needs to be set according to the actual working environment of the rotary compressor 100. When the core assembly 200 has an oil passage structure and the structural strength of the fixing part 3 is insufficient in the process of supporting the motor 1 or core 2 of the core assembly 200, the thickness of the connecting part 4 should be appropriately increased to ensure that the connecting part 4 is not easily twisted or deformed when supporting the fixing part 3.

[0048] like Figure 9 As shown, in some embodiments of this application, the cross-sectional area of ​​the oil passage 41 gradually decreases along the return direction of the lubricating oil. Wherein, in Figure 9 In the illustrated embodiment, the lubricating oil flows downwards along the inner wall of the casing 110 of the rotary compressor 100 under its own gravity. At this time, the return direction of the lubricating oil is... Figure 1 The direction is from top to bottom. It should be noted that the cross-section of the oil passage 41 is perpendicular to the central axis of the movement assembly 200. By making the upper cross-sectional area of ​​the oil passage 41 larger than the lower cross-sectional area, the lubricating oil can flow more easily into the oil passage 41, and the center of gravity of the lubricating oil in the oil passage 41 is higher, which can further accelerate the flow speed of the lubricating oil in the oil passage 41, thereby further reducing the amount of lubricating oil accumulated above the base.

[0049] Furthermore, such as Figure 9 As shown, the maximum radial dimension of the oil passage 41 is D1, the minimum radial dimension of the oil passage 41 is D2, and the average radial dimension of the oil passage 41 is D3. D1, D2, and D3 satisfy the relationship: D1*D2≥0.5D3 2 Where D1 > D3 > D2. This arrangement ensures that the difference between the maximum and minimum cross-sectional areas of the oil passage 41 is appropriate, allowing the lubricating oil to flow more easily into the oil passage 41. Furthermore, the center of gravity of the lubricating oil within the oil passage 41 is higher, minimizing the impact of an excessively small minimum cross-sectional area on the flow rate of the lubricating oil within the oil passage 41. This further increases the return flow rate of the lubricating oil and reduces the amount of lubricating oil accumulating above the base.

[0050] Based on this, the application further discloses a rotary compressor 100, which comprises a shell 110 and a core assembly 200. The shell 110 defines a mounting space, and the top of the shell 110 is provided with a discharge port. The core assembly 200 is installed in the shell 110, and the core assembly 200 is provided with an oil passage structure.

[0051] According to the rotary compressor 100 of the application, the rotary compressor 100 is provided with the core assembly 200, and the core assembly 200 is provided with the oil passage structure. By arranging the oil return gap 42 on the connecting portion 4 of the oil passage structure, the length of the oil passage 41 is reduced, the flow speed of the lubricating oil in the oil passage 41 is improved, the accumulation of the lubricating oil above the motor 1 or the core 2 of the core assembly 200 is reduced, the lubricating oil can flow back to the bottom oil storage area of the rotary compressor 100 in time, the lubricating oil discharged to the outside of the rotary compressor 100 is reduced, the components in the rotary compressor 100 are fully lubricated, and the working reliability of the rotary compressor 100 is improved.

[0052] Specifically, the core assembly 200 comprises the motor 1 and the core 2. The core 2 is drivingly connected with the motor 1 and arranged along the axial direction (i.e. the up-down direction in the figure) of the core assembly 200, and in the embodiment shown in the figure, the motor 1 is arranged above the core 2. The motor 1 is used to drive the core 2 to suck, compress and discharge the medium. In the rotary compressor 100, the mixture of the medium and the lubricating oil is discharged from the core assembly 200 above the motor 1 after being sucked by the core 2 from the lower end of the core assembly 200, and then the oil separator above the motor 1 separates the medium and the lubricating oil. Figure 1 Figure 1 The motor 1 and / or the core 2 are provided with the oil passage structure, that is, the outer peripheral wall of the motor 1 is provided with the fixed portion 3, or the outer peripheral wall of the core 2 is provided with the fixed portion 3, or the outer peripheral walls of the motor 1 and the core 2 are both provided with the fixed portion 3. In some preferred embodiments, the motor 1 and the core 2 are both provided with the fixed portion 3, so that the connection strength between the core assembly 200 and the shell 110 is improved, the vibration of the core assembly 200 in the shell 110 during operation is reduced, and the working noise of the rotary compressor 100 is reduced.

[0053] Further, as shown in the figure, the oil passage structure comprises a connecting portion 4 and an oil passage 41. The connecting portion 4 is arranged on the outer peripheral wall of the motor 1 and / or the core 2, and the oil passage 41 is arranged on the connecting portion 4. The oil passage 41 is arranged in the axial direction of the core assembly 200, and the oil passage 41 is arranged in the up-down direction of the core assembly 200.

[0054] Further, as shown in the figure, the oil passage structure comprises a connecting portion 4 and an oil passage 41. The connecting portion 4 is arranged on the outer peripheral wall of the motor 1 and / or the core 2, and the oil passage 41 is arranged on the connecting portion 4. The oil passage 41 is arranged in the axial direction of the core assembly 200, and the oil passage 41 is arranged in the up-down direction of the core assembly 200. Figure 1 Figure 2 ​​As shown, in some embodiments of the present application, the motor 1 comprises a stator 11 and a rotor 12, the stator 11 is sleeved outside the rotor 12, the output end of the rotor 12 is in transmission connection with the movement 2, and the rotor 12 is used to output power to the movement 2 to drive the movement 2 to suck, compress and discharge the medium. The stator 11 is configured as the base of the above-mentioned embodiments, that is, the outer peripheral wall of the stator 11 is provided with the fixing part 3, and the motor 1 can be fixed to the inner wall of the shell 110 through the fixing part 3 on the stator 11 to reduce the vibration generated when the motor 1 operates. Moreover, the stator 11 is spaced apart from the corresponding connecting part 4 to form the oil passing channel 41, and the connecting part 4 corresponding to the stator 11 is provided with the oil return gap 42, and in this way, the length size of the oil passing channel 41 defined between the stator 11 and the connecting part 4 can be reduced, so that the lubricating oil can more easily flow from the outside of the stator 11 to the bottom oil storage area of the shell 110.

[0055] As shown in the drawings, Figures 1-4 As shown, in some embodiments of the present application, when the rotary compressor 100 is a rotary compressor, the movement 2 can comprise a crankshaft 21, a cylinder 22, a piston 23 and a flange 24, the crankshaft 21 extends along the axial direction of the movement assembly 200 (i.e. the up-down direction in the drawings), one end of the crankshaft 21 is in transmission connection with the motor 1, and the crankshaft 21 is used to transmit the power generated by the motor 1 to the movement 2. Specifically, the crankshaft 21 is fixedly connected with the output end of the rotor 12 of the motor 1, and the rotor 12 can drive the crankshaft 21 to rotate. Figure 1

[0056] The piston 23 is sleeved outside the end of the crankshaft 21 away from the motor 1 and extends into the cylinder 22, and the crankshaft 21 drives the piston 23 to make eccentric rotation in the cylinder 22 when the crankshaft 21 is driven. When the piston 23 moves, the medium is sucked into the cylinder 22, and the piston 23 compresses and discharges the medium in the cylinder 22.

[0057] Along the axial direction of the movement assembly 200, the flange 24 is installed at the end of the cylinder 22. It should be noted that the cylinder 22 is provided with the flange 24 on both sides, and the flange 24 is used to close the cylinder 22 to limit the internal parts of the cylinder 22. The two flanges 24 are respectively an upper flange 241 and a lower flange 242, and the upper flange 241 is located above the lower flange 242. The flange 24 has a avoiding hole for avoiding the crankshaft 21, the crankshaft 21 passes through the flange 24, and the flange 24 can limit the crankshaft 21. Further, the flange 24 is also provided with a support bearing for axially supporting the crankshaft 21.

[0058] ​The flange 24 is configured as the base of the above-mentioned embodiments, that is, the outer peripheral wall of the flange 24 is provided with the fixing portion 3, and the movement core 2 can be fixed to the inner wall of the machine shell 110 through the fixing portion 3 on the flange 24, so as to reduce the vibration generated when the movement core 2 operates. In some preferred embodiments, the outer peripheral wall of the upper flange 241 is provided with the fixing portion 3, so that the support force received by the movement core 2 is more suitable. Moreover, the flange 24 is spaced apart from the corresponding connecting portion 4 to form the oil passing channel 41, so that the length of the oil passing channel 41 defined between the flange 24 and the connecting portion 4 can be reduced, so that the lubricating oil can more easily flow from the outside of the flange 24 to the bottom oil storage area of the machine shell 110.

[0059] It should be noted that the movement core 2 also includes components such as a slide, and other components in the movement core 2 are embodied in the prior art, and will not be described here.

[0060] The above-mentioned is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can be made, and these improvements and replacements should be considered as the protection scope of the present application.

Claims

1. An oil passage structure characterized by comprising: The oil passage structure is suitable for a core assembly of a rotary compressor, the rotary compressor further comprising a casing, the core assembly being arranged in the casing, the oil passage structure comprising: a base; a fixing portion arranged on an outer peripheral wall of the base, the fixing portion being configured to be connected to the casing, the fixing portion having a first side wall and a second side wall spaced apart along a circumferential direction of the base, adjacent first and second side walls being spaced apart to form a clearance gap on an outer side of the fixing portion along the circumferential direction of the base; the clearance gap is configured as an oil passage, or a connecting portion is arranged in the clearance gap, the connecting portion being connected between the corresponding first and second side walls, the connecting portion being spaced apart from the base along a radial direction of the base to form an oil passage, at least one of the connecting portions being provided with an oil return gap in an end wall along an axial direction of the base, the oil return gap extending along the axial direction of the base to reduce a length dimension of the oil passage.

2. The oil passage structure according to claim 1, characterized by The base is provided with a plurality of fixing portions spaced apart along the circumferential direction of the base, and the connecting portion is arranged between any two adjacent fixing portions.

3. The oil passage structure according to claim 2, characterized by Each of the connecting portions is provided with the oil return gap.

4. The oil passage structure according to claim 2, characterized by One side end wall of the connecting portion along the axial direction of the base is provided with the oil return gap, or both side end walls of the connecting portion are provided with the oil return gap.

5. The oil passage structure according to claim 1, characterized by The thickness dimension of the connecting portion provided with the oil return gap is L, and the thickness dimension of the outer peripheral wall of the base opposite to the oil passage is H, L and H satisfy the relationship: 0≤L / H<1.

6. The oil passage structure according to claim 1, characterized by The cross-sectional area of the oil passage gradually decreases in the oil return direction of the lubricating oil.

7. The oil passage structure according to claim 6, characterized by The maximum radial dimension of the oil passage is D1, the minimum radial dimension of the oil passage is D2, and the average radial dimension of the oil passage is D3, D1, D2 and D3 satisfy the relationship: D1*D2≥0.5D3 2 wherein D1>D3>D2.

8. A rotary compressor characterized by comprising: Comprising: a casing defining a mounting space; a core assembly mounted in the casing, the core assembly having an oil passage structure, the oil passage structure being according to any one of claims 1-7.

9. The rotary compressor of claim 8, wherein The core assembly comprises a motor, the motor comprising a stator and a rotor, the stator being arranged outside the rotor, an output end of the rotor being connected to the core transmission, and the stator being configured as the base.

10. The rotary compressor of claim 8, wherein The core assembly comprises a core, the core comprising a cylinder and a flange, the flange being arranged at an end of the cylinder along an axial direction of the core assembly, and the flange being configured as the base.

Images