Check assembly, crankshaft and compressor

Abstract

The present invention provides a check assembly, a crankshaft and a compressor. The check assembly includes a support portion, the support portion has a guide portion and a flow portion; a limit portion, the limit portion can be movably arranged in the guide portion; a sealing portion, the sealing portion is connected to the first end of the limit portion, the sealing portion has a sealing position for sealing the flow portion, and the sealing portion has an open position away from the flow portion to open the flow portion; wherein, when the fluid passes through the flow portion from one side of the second end of the limit portion, the fluid drives the sealing portion to the open position, and when the fluid stops passing through the flow portion, the fluid located on one side of the sealing portion drives the sealing portion to the sealing position. The structure of the check assembly is simple and reliable, especially when it is used on the crankshaft of the compressor, when the compressor is in operation, the lubricating oil can only move upward along the crankshaft channel, and when the compressor is stopped, due to the action of the check assembly, the lubricating oil cannot flow back to the oil pool along the original path of the crankshaft channel.

Description

Technical Field

[0001] The present invention relates to the technical field of compressor equipment, and in particular to a check assembly, a crankshaft and a compressor. Background Art

[0002] The pump body of the scroll compressor is composed of a static scroll plate, a movable scroll plate, an upper bracket, a cross slip ring and a crankshaft. Whether the friction pairs between the various components can be effectively lubricated is the key to measuring the capacity of the compressor, that is, the rationality of the design of the internal oil circuit of the compressor. The compressor has been stopped for a long time. When the compressor is restarted, the speed at which the lubricating oil reaches the friction pairs of the components is the focus of the designers. This compressor uses an oil pump for oil supply. Driven by the motor, the crankshaft drives the oil pump to rotate and absorb oil. The lubricating oil moves upward along the axial through hole of the crankshaft and reaches the top of the crankshaft. The lubricating oil lubricates the movable plate bearing. After entering the back pressure cavity, the lubricating oil moves in two ways: one way enters the cavity to lubricate the static and dynamic scroll plates, and the other way flows back to the sheet metal along the radial channel inside the upper bracket, thereby returning to the oil pool at the bottom of the compressor. This cycle ensures the lubrication effect between the friction pairs inside the compressor.

[0003] In the prior art, when the compressor stops running for a long time, it is enough to make the friction pairs such as the compressor pump body without lubricating oil. The lubricating oil between all friction pairs is all stationary in the oil pool at the bottom of the compressor. When it is started again, the motor drives the pump body to rotate, and the oil pump starts to supply oil. Due to the long oil supply path, the lubricating oil cannot reach the friction pairs of the pump body in time, and dry grinding occurs between the moving and static scrolls, posing the risk of failure of the moving and static scrolls. Especially when running at high frequencies, the pump body has a large demand for lubricating oil. When the compressor is frequently started and stopped or changes operating conditions, lubrication failure is very likely to occur, resulting in the compressor being stuck and abnormal noise, and ultimately the compressor cannot work properly. Summary of the invention

[0004] The main purpose of the present invention is to provide a check assembly, a crankshaft and a compressor to solve the problem in the prior art that the compressor is easily stuck due to lack of oil.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a check assembly is provided, comprising: a supporting portion, the supporting portion having a guide portion and a flow portion; a limiting portion, the limiting portion being movably arranged in the guide portion; a sealing portion, the sealing portion being connected to the first end of the limiting portion, the sealing portion having a sealing position for sealing the flow portion, and the sealing portion having an opening position away from the flow portion to open the flow portion; wherein, when the fluid passes through the flow portion from one side of the second end of the limiting portion, the fluid drives the sealing portion to the opening position, and when the fluid stops passing through the flow portion, the fluid on one side of the sealing portion drives the sealing portion to the sealing position.

[0006] Furthermore, the flow portion is a flow hole opened on the supporting portion.

[0007] Further, there are a plurality of flow holes, the plurality of flow holes are arranged at intervals, and the cross-sectional area of ​​at least one of the plurality of flow holes is different from the cross-sectional areas of the remaining flow holes.

[0008] Furthermore, the sealing part includes: a sealing body, which is connected to the limiting part; a sealing column, which is connected to the sealing body, and the sealing column is arranged one-to-one with the flow hole. When the sealing part is located in the sealing position, at least part of the sealing column extends into the flow hole, and when the sealing part is located in the open position, the sealing column is located outside the flow hole.

[0009] Furthermore, the guiding portion is a guiding through hole, and a straight-face structure is arranged on a side wall of the guiding through hole.

[0010] Furthermore, the limiting part includes: a rod part, the rod part is movably arranged in the guide part, the first end of the rod part is connected to the sealing body, and the second end of the rod part is provided with a limiting step.

[0011] Furthermore, the check assembly includes: a first buffer member, which is sleeved on the rod body and located between the sealing body and the support portion, and / or a second buffer member, which is sleeved on the rod body and located between the sealing body and the limiting step.

[0012] Furthermore, the second end of the rod body is a hollow structure, and a channel communicating with the hollow structure is provided on the side wall of the rod body.

[0013] Furthermore, the end portion of the second end of the rod body portion is used to be connected to a rotor of an oil pump.

[0014] Furthermore, the supporting portion is a cylindrical structure, the guiding portion is arranged in the middle of the cylindrical structure, and the flow-through portion and the guiding portion are arranged at intervals.

[0015] According to another aspect of the present invention, a crankshaft is provided, comprising a non-return assembly, wherein the non-return assembly is the non-return assembly described above.

[0016] Furthermore, the middle portion of the crankshaft is a hollow structure, and the outer circumferential surface of the support portion of the non-return assembly is interference fit with the inner circumferential surface of the crankshaft.

[0017] Furthermore, a stop step is provided inside the crankshaft near one end of the oil pump. When the sealing portion is in the open position, the limit step of the rod body fits with the stop step. When the sealing portion is in the sealing position, the limit step is arranged away from the stop step.

[0018] According to another aspect of the present invention, a compressor is provided, comprising a crankshaft, wherein the crankshaft is the above-mentioned crankshaft.

[0019] The technical solution of the present invention is simple and reliable in structure. In particular, when the non-return assembly is used on the crankshaft of the compressor, the lubricating oil can only move upward along the crankshaft channel when the compressor is running. When the compressor is stopped, the lubricating oil cannot flow back to the oil pool along the crankshaft channel due to the effect of the non-return assembly. When the compressor is started again, the lubricating oil can reach between the friction pairs of the pump body more quickly, so that the moving and static scroll plates can be effectively lubricated and sealed, thereby quickly establishing back pressure, greatly improving the lubrication capacity of the compressor, reducing the power of the compressor, avoiding abnormal noise and other problems, and enhancing the reliability of the compressor. The problem of the compressor being stuck due to lack of oil is effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 A schematic diagram showing an exploded structure of a first embodiment of a non-return assembly according to the present invention is shown;

[0022] Figure 2 A schematic structural diagram of a first embodiment of a non-return assembly according to the present invention is shown;

[0023] Figure 3 A schematic structural diagram of an embodiment of a support portion of a non-return assembly according to the present invention is shown;

[0024] Figure 4 A schematic structural diagram of an embodiment of a limiting portion and a sealing portion of a non-return assembly according to the present invention is shown;

[0025] Figure 5 A schematic cross-sectional view of an embodiment of a limiting portion and a sealing portion of a non-return assembly according to the present invention is shown;

[0026] Figure 6 A schematic structural diagram of a second embodiment of a non-return assembly according to the present invention is shown;

[0027] Figure 7 A schematic cross-sectional view of a second embodiment of a check assembly according to the present invention is shown;

[0028] Figure 8 A schematic diagram of the assembly structure of a second embodiment of a non-return assembly according to the present invention is shown;

[0029] Fig. 9 A schematic cross-sectional view of a first embodiment of a compressor according to the present invention is shown;

[0030] Fig.10A schematic structural diagram of a first embodiment of a driving end of a compressor according to the present invention is shown;

[0031] Fig.11 A schematic cross-sectional view of a second embodiment of a compressor according to the present invention is shown;

[0032] Fig.12 Shows Fig.11 A in the figure is an enlarged structural diagram.

[0033] The above drawings include the following reference numerals:

[0034] 10. Supporting part; 11. Guide part; 111. Face structure; 12. Flow-passing part;

[0035] 20. Position-limiting portion; 21. Rod body portion; 211. Channel; 212. Straight-face structure; 22. Position-limiting step; 23. First buffer; 24. Second buffer;

[0036] 30. Sealing part; 31. Sealing body; 32. Sealing column;

[0037] 40. Stop step;

[0038] 51. Stationary scroll; 52. Orbital scroll; 53. Upper bracket; 54. Oil return sheet metal; 55. Crankshaft; 56. Oil pump; 57. Oil pool; 58. Drive end; 581. Rotor. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0042] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0043] Combination Figures 1 to 12 As shown, according to an embodiment of the present invention, a check assembly is provided.

[0044] Specifically, Figure 1 and Figure 2 As shown, the check assembly includes a support portion 10, a limiting portion 20 and a sealing portion 30. The support portion 10 has a guide portion 11 and a flow portion 12. The limiting portion 20 is movably arranged in the guide portion 11. The sealing portion 30 is connected to the first end of the limiting portion 20, and the sealing portion 30 has a sealing position for sealing the flow portion 12, and the sealing portion 30 has an open position away from the flow portion 12 to open the flow portion 12. When the fluid passes through the flow portion 12 from one side of the second end of the limiting portion 20, the fluid drives the sealing portion 30 to the open position, and when the fluid stops passing through the flow portion 12, the fluid on one side of the sealing portion 30 drives the sealing portion 30 to the sealing position.

[0045] In this embodiment, the structure of the check assembly is simple and reliable, especially when it is used on the crankshaft of the compressor. When the compressor is in operation, the lubricating oil can only move upward along the crankshaft channel. When the compressor is stopped, the lubricating oil cannot flow back to the oil pool 57 along the crankshaft channel due to the action of the check assembly. When the compressor is turned on again, the lubricating oil can reach between the friction pairs of the pump body more quickly, so that the moving and static scroll plates can be effectively lubricated and sealed, thereby quickly establishing back pressure, greatly improving the lubrication capacity of the compressor, reducing the power of the compressor, avoiding abnormal noise and other problems, and enhancing the reliability of the compressor. It effectively avoids the problem of the compressor being stuck due to lack of oil.

[0046] The flow portion 12 is a flow hole opened on the support portion 10. Preferably, there are multiple flow holes, and the multiple flow holes are arranged at intervals, and the cross-sectional area of ​​at least one of the multiple flow holes is different from the cross-sectional areas of the other flow holes. Such an arrangement can increase the flow rate of the flow portion.

[0047] Further, the sealing part 30 includes a sealing body 31 and a sealing column 32. The sealing body 31 is connected to the limiting part 20. The sealing column 32 is connected to the sealing body 31, and the sealing column 32 is arranged one-to-one with the flow hole. When the sealing part 30 is in the sealing position, at least part of the sealing column 32 extends into the flow hole. When the sealing part 30 is in the open position, the sealing column 32 is located outside the flow hole. Such an arrangement can improve the sealing reliability of the sealing part 30.

[0048] like Figure 3 As shown, the guide portion 11 is a guide through hole, and a straight surface structure 111 is arranged on the side wall of the guide through hole. This arrangement can prevent the limiting portion 20 from rotating circumferentially in the guide through hole, so as to prevent the sealing column from being accurately inserted into the flow hole.

[0049] Specifically, Figure 2 As shown, the limiting portion 20 includes a rod portion 21. The rod portion 21 is movably arranged in the guide portion 11, the first end of the rod portion 21 is connected to the sealing body 31, and the second end of the rod portion 21 is provided with a limiting step 22. This arrangement enables the rod portion 21 to effectively limit the travel of the rod portion 21 when the guide portion 11 slides in the vertical direction, further improving the reliability of the non-return assembly.

[0050] In order to prevent the end of the rod body 21 from hitting the end surface of the support part 10, the check assembly is provided with a first buffer 23 and a second buffer 24. The first buffer 23 is sleeved on the rod body 21 and is located between the sealing body 31 and the support part 10, and the second buffer 24 is sleeved on the rod body 21 and is located between the sealing body 31 and the limiting step 22. Preferably, the first buffer 23 and the second buffer 24 are spring structures.

[0051] According to another embodiment of the present application, Figure 6 and Figure 7 As shown, the second end of the rod body 21 is a hollow structure, and a channel 211 connected to the hollow structure is provided on the side wall of the rod body 21. This arrangement allows lubricating oil to enter and be discharged through the end of the rod body 21, which can further increase the oiling speed of the lubricating oil.

[0052] In this embodiment, if Fig. 9 As shown, the end of the second end of the rod body 21 is used to connect with the rotor of the oil pump 56. That is, the second end of the rod body 21 forms the driving end 58 of the oil pump. This arrangement can effectively reduce the number of crankshaft components and further reduce the difficulty of processing the crankshaft assembly.

[0053] Preferably, the support portion 10 is a cylindrical structure, the guide portion 11 is opened in the middle of the cylindrical structure, and the flow portion 12 is spaced apart from the guide portion 11 .

[0054] The non-return assembly in the above embodiment can also be used in the technical field of crankshaft equipment, that is, according to another aspect of the present invention, a crankshaft 55 is provided, including a non-return assembly, and the non-return assembly is the non-return assembly in the above embodiment. The middle part of the crankshaft is a hollow structure, and the outer peripheral surface of the support part 10 of the non-return assembly is interference-fitted with the inner peripheral surface of the crankshaft. Such a setting can improve the stability of the installation of the non-return assembly.

[0055] like Fig.12 As shown, a stop step 40 is provided inside the crankshaft near one end of the oil pump, and when the sealing portion 30 is in the open position, the limit step 22 of the rod body 21 fits with the stop step 40, and when the sealing portion 30 is in the sealing position, the limit step 22 is arranged away from the stop step 40. This arrangement enables the end of the rod body 21 to always be connected to the rotor 581 of the oil pump, effectively improving the reliability and stability of the oil pump drive end.

[0056] The crankshaft in the above embodiment can also be used in the technical field of compressor equipment. That is, according to another aspect of the present invention, a compressor is provided, including a crankshaft, and the crankshaft is the crankshaft in the above embodiment.

[0057] Specifically, in order to solve the problem that when the compressor is restarted after a long period of shutdown, the lubricating oil cannot reach the friction pairs of the pump body in time, resulting in the dry friction of the movable and static scrolls (moving scroll 52, static scroll 51) causing failure, the movable and static scrolls cannot be effectively sealed, and the back pressure is abnormally established, this article provides a solution. From the perspective of structural optimization, a check assembly can be added to the oil passage near the lower end of the crankshaft. When the compressor stops running, the lubricating oil in the crankshaft passage will not return to the oil pool at the bottom of the compressor under the action of gravity. When the compressor is restarted, the lubricating oil will reach the inside of the pump body in time, which makes up for the common shortcomings of the compressor starting from the bottom of the crankshaft, and greatly reduces the probability of the movable and static scrolls failing due to dry friction, the movable and static scrolls cannot be effectively sealed, and the back pressure is abnormally established.

[0058] The check assembly adopting this structure also effectively solves the problem of poor sealing of the orbiting and stationary scrolls during operation, improves the lubrication capacity of each friction pair inside the compressor, and solves the problems of high compressor power and abnormal noise.

[0059] The non-return assembly includes a support part, a sealing part and upper and lower springs. The end surface of the support part has two circles of arrayed flow holes, and the sealing part is provided with sealing columns corresponding to the two circles of arrayed flow holes. The outer circle of the support part is interference fit with the crankshaft, and the center of the support part is provided with a cut edge (i.e. Figure 6 The through hole of the straight-facing structure 212) is provided to prevent the sealing portion from rotating circumferentially in the through hole.

[0060] The sealing part is provided with a sealing column and an upper circular step (such as Figure 5 As shown in A in the figure, the rod body 21 and the support part are clearance-fitted, the first end of the rod body 21 is connected to the sealing part by means of threads, the sealing column is used to seal the flow hole on the support part, the inner circle of the upper spring and the outer circle of the upper circular step are interference-fitted, and the lower spring is also assembled in the same way to prevent the spring from moving up and down and improve the stability of the component.

[0061] When the compressor starts, the rotation of the crankshaft drives the oil pump to rotate, and the oil pump sucks oil upward. The sealing part moves upward under the impact force of the oil to prevent the lower end base of the sealing part from colliding with the lower end surface of the support part, shortening the life of the check assembly, so a spring is used for buffering between the two. When the compressor stops working, the crankshaft stops rotating, and the oil pump stops supplying oil upward. The lubricating oil in the crankshaft channel will flow back. Under the gravity of this part of the oil and the gravity of the sealing part itself, the sealing part moves downward to prevent the upper end of the sealing part from colliding with the upper end surface of the support part. The spring is used for buffering. As long as part of the sealing column on the sealing part enters the oil flow through hole of the support part, the sealing through hole can be achieved, so that the lubricating oil above the check assembly cannot flow back to the oil pool at the bottom of the compressor. When the compressor starts again, the lubricating oil will quickly reach the part that needs lubrication, making up for the disadvantage of supplying oil from the lower end of the crankshaft. It effectively solves the problems that the lubricating oil cannot reach the friction pairs of the pump body in time, resulting in the failure of the movable and static scroll plates due to dry friction, the failure of the movable and static scroll plates to be effectively sealed, and the abnormal back pressure establishment. It greatly reduces the probability of the movable and static scroll plates failing due to dry friction, the failure of the movable and static scroll plates to be effectively sealed, and the abnormal back pressure establishment, improves the oil supply capacity of the compressor, and thus improves the reliability of the compressor.

[0062] The inner ring of the lower spring has an interference fit with the limiting step at the second end of the rod body 21, the central through hole of the support part has a clearance fit with the rod body 21, the cut edges of the two correspond to each other, and the inner ring of the upper spring has an interference fit with the outer circle of the upper circular step at the first end of the rod body 21.

[0063] When the compressor stops running for a long time and starts again, the electric drive crankshaft rotates, and the cutting edge of the driving end that is interference fit with the crankshaft drives the oil pump to rotate, and the oil pump supplies oil upward. The seal moves upward under the impact of the lubricating oil to prevent the lower end base of the seal from colliding with the lower end surface of the support, so that the check assembly collides and causes displacement. Therefore, a spring is used between the two for flexible buffering to improve the life of the check assembly. When the compressor stops running, the motor stops working, the crankshaft stops rotating, and the oil pump stops supplying oil upward. The lubricating oil in the crankshaft channel will flow back. Under the thrust of this part of the oil on the head of the seal and the gravity of the seal itself, the seal moves downward to prevent the upper end of the seal from colliding with the upper end surface of the support and causing displacement. A spring is used between the two for flexible buffering. As long as part of the sealing column on the seal enters the oil flow through hole of the support, the sealing channel can be realized, thereby preventing the lubricating oil above the check assembly from flowing back to the oil pool at the bottom of the compressor. When the compressor starts again, the lubricating oil will quickly reach the part that needs lubrication, making up for the disadvantage of oil supply from the lower end of the crankshaft, thereby improving the quality of the compressor.

[0064] When the compressor starts at high speed, the compressor's moving and static scrolls and other parts start running first, and each friction pair is in an oil-deficient state. Then the lubricating oil reaches each friction pair for lubrication under the action of the oil pump. In the process of rapid frequency increase and decrease, this phenomenon is more obvious. The front substrate, tooth top and back phosphating layer of the moving scroll fall off and become severely worn. The end face of the static scroll has bite wear, causing both to fail, reducing the compressor performance and shortening the reliability life, and abnormal noise. Adding a check assembly can greatly reduce the probability of compressor failure and ensure the quality of the compressor.

[0065] In another embodiment of the present application, the check drive integrated part can both drive the oil pump and play a check role. Under the effective control of the upper and lower springs, the upper and lower limit positions of the check seal optimization structure cannot exceed the position range of the drive end cutting edge driving oil pump rotor. The compressor is also provided with an upper bracket 53, an oil return sheet metal part 54,

[0066] The outer circle of the sealing cover plate in the optimized structure of the sealing part is matched with the inner circle of the through hole at the lower end of the crankshaft. When the compressor starts, the optimized structure of the sealing part on the crankshaft drives the oil pump to rotate and suck oil upward into the oil flow axial channel, and continues to move upward through the radial channel 211 of the side wall, impacting the sealing column to make the sealing part move upward, the flow hole on the support part opens, the oil circuit is connected, and the friction pairs inside the compressor are lubricated. When the compressor stops running, the movement principle of the check drive integrated part is the same as that of the split implementation.

[0067] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0068] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0069] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A non-return assembly, characterized in that: include: A support portion (10), the support portion (10) comprising a guide portion (11) and a flow-through portion (12); a limiting portion (20), the limiting portion (20) being movably disposed in the guiding portion (11); a sealing portion (30), the sealing portion (30) being connected to the first end of the limiting portion (20), the sealing portion (30) having a sealing position for sealing the flow-through portion (12), and an opening position for being away from the flow-through portion (12) for opening the flow-through portion (12); When the fluid passes through the flow portion (12) from one side of the second end of the limiting portion (20), the fluid drives the sealing portion (30) to the open position; when the fluid stops passing through the flow portion (12), the fluid on one side of the sealing portion (30) drives the sealing portion (30) to the sealing position; The flow portion (12) is a flow hole opened on the support portion (10); There are a plurality of the flow holes, the plurality of the flow holes are arranged at intervals, and the cross-sectional area of ​​at least one of the plurality of flow holes is different from the cross-sectional areas of the remaining flow holes; The sealing portion (30) comprises: A sealing body (31), the sealing body (31) being connected to the limiting portion (20); a sealing column (32), the sealing column (32) being connected to the sealing body (31), the sealing column (32) being arranged in one-to-one correspondence with the flow hole, and when the sealing portion (30) is located at the sealing position, at least a portion of the sealing column (32) extends into the flow hole, and when the sealing portion (30) is located at the opening position, the sealing column (32) is located outside the flow hole; The limiting portion (20) comprises: A rod body portion (21), the rod body portion (21) being movably disposed in the guide portion (11), a first end of the rod body portion (21) being connected to the sealing body (31), and a limiting step (22) being provided at a second end of the rod body portion (21); The second end of the rod body (21) is a hollow structure, and a channel (211) communicating with the hollow structure is provided on the side wall of the rod body (21).

2. The check assembly according to claim 1, characterized in that: The guide portion (11) is a guide through hole, and a straight surface structure (111) is provided on the side wall of the guide through hole.

3. The check assembly according to claim 1, characterized in that: The non-return assembly comprises: a first buffer member (23), the first buffer member (23) being sleeved on the rod body (21) and located between the sealing body (31) and the support portion (10), and / or A second buffer member (24), the second buffer member (24) is sleeved on the rod body (21) and is located between the sealing body (31) and the limiting step (22).

4. The check assembly according to claim 1, characterized in that: The end portion of the second end of the rod body portion (21) is used to be connected to the rotor of the oil pump.

5. The check assembly according to claim 1, characterized in that: The support portion (10) is a cylindrical structure, the guide portion (11) is opened in the middle of the cylindrical structure, and the flow portion (12) is arranged at a distance from the guide portion (11).

6. A crankshaft, comprising a non-return assembly, characterized in that: The non-return assembly is the non-return assembly according to any one of claims 1 to 5.

7. The crankshaft according to claim 6, characterized in that The middle portion of the crankshaft is a hollow structure, and the outer circumferential surface of the support portion (10) of the non-return assembly is interference-fitted with the inner circumferential surface of the crankshaft.

8. The crankshaft according to claim 6, characterized in that A stop step (40) is provided inside one end of the crankshaft close to the oil pump; when the sealing portion (30) is located at the open position, the limit step (22) of the rod body (21) fits against the stop step (40); when the sealing portion (30) is located at the sealing position, the limit step (22) is arranged away from the stop step (40).

9. A compressor comprising a crankshaft, characterized in that: The crankshaft is the crankshaft according to any one of claims 6 to 8.

Images