Pump oil path structure, pump, compressor and air conditioner

Abstract

Provided in the present disclosure are a pump oil path structure, a pump, a compressor and an air conditioner. The pump oil path structure comprises: an upper flange, wherein an upper oil groove and an oil return portion are provided on the inner wall of a shaft hole of the upper flange; the lower end of the upper oil groove can be configured to suck in oil, the upper oil groove extends upwards along the inner wall of the shaft hole, and the upper end of the upper oil groove is located at the top end of the upper flange or spaced apart by a preset distance from the top end of the upper flange; and the oil return portion is in direct communication with the upper oil groove so as to suck in oil from the upper oil groove and guide the oil into an oil sump of a compressor. The present disclosure can reduce the oil carryover rate to the maximum extent, and can improve the lubricating effect; and the oil return portion is in direct communication with the upper oil groove, and the structural form of an oil storage tank is omitted, such that the flowing of lubricating oil can be continuously ensured when a compressor operates under low-frequency working conditions, the lubricating performance of the oil regarding the upper flange at a low frequency can be ensured, and the problem of the lubricating capacity being reduced during low-frequency operation due to the provision of an oil storage tank is solved.

Description

Pump body oil circuit structure, pump body, compressor and air conditioner

[0001] This disclosure claims priority to the Chinese patent application filed with the China Patent Office on November 22, 2023, with application number 202311572182.5 and invention name “A pump body oil circuit structure, pump body, compressor and air conditioner”, the entire contents of which are incorporated by reference in this disclosure. Technical Field

[0002] The present disclosure relates to the technical field of compressors, and in particular to a pump oil circuit structure, a pump body, a compressor, and an air conditioner. Background Art

[0003] Conventional rolling rotor compressors primarily consist of a pump assembly, motor assembly, liquid distributor components, housing assembly, upper cover, and lower cover. The housing assembly, along with the upper and lower covers, forms a sealed structure. The interior of the housing primarily consists of two major components: the pump assembly and the motor assembly. The pump assembly includes the upper flange, cylinder, crankshaft, rollers, and lower flange, all of which work together to form a sealed cavity. The motor assembly comprises the stator assembly and rotor assembly. A rotary compressor generates driving force on the pump crankshaft through the electromagnetic force generated between the motor rotor and stator assemblies. Driven by the crankshaft's rotation, the pump cavity's volume continuously changes, resulting in periodic intake, compression, and exhaust. The oil-gas mixture exhausted from the pump cavity enters the motor's lower chamber, then flows through the motor's circulation channel holes to the motor's upper chamber, where it exits the compressor and enters the air conditioning system.

[0004] Lubrication between the various friction pairs in the compressor pump body primarily relies on oil circuits within the pump body to pump lubricating oil to the contact surfaces of the moving parts, thereby providing lubrication, cooling, and heat dissipation. The oil circuit structure of the main and secondary bearings of a conventional rolling rotor compressor is as follows: the crankshaft is equipped with a central oil hole. Side oil holes are designed at the roots of the major and minor shafts, connecting to the central oil hole. The central oil hole is equipped with an oil pumping device with oil guide plates. Oil grooves are provided on the inner surfaces of the upper and lower flanges. A fixed amount of lubricating oil is contained in the lower portion of the casing. During operation, the oil pumping device at the center oil hole of the crankshaft pumps lubricating oil from the lower oil reservoir into the central oil hole. It is then pumped through the side oil holes at the roots of the major and minor shafts to the inner ends of the lower and upper flanges, respectively. The oil is then pumped through the oil grooves in the upper and lower flanges to the friction pairs (primary and secondary bearings) between the flanges and the crankshaft. Lubricating oil in the lower flange oil groove is directly pumped into the oil reservoir, while lubricating oil in the upper oil groove is pumped out of the pump body into the lower chamber of the motor, thus achieving oil circuit lubrication for the main and secondary bearings.

[0005] When a compressor operates at high frequencies, friction between moving parts generates significant heat. Insufficient pump oil leads to inadequate heat dissipation, causing the pump body to heat up rapidly, heating the cylinder's working chamber and reducing volumetric efficiency. This, coupled with a rapid rise in exhaust temperature, reduces motor efficiency and ultimately degrades compressor performance. Furthermore, high frequencies place even higher demands on lubrication between the contact surfaces of moving parts, particularly between the crankshaft and the upper flange, which requires ample lubrication.

[0006] In addition, when the compressor is running, the cavity is filled with oil droplets. One of the main sources of these oil droplets is that the lubricating oil circuit of the pump body is directly connected to the lower cavity of the motor. Under the action of centrifugal force and gas force, the oil in the lubricating oil circuit enters the upper cavity of the motor and is then discharged into the system, resulting in a high oil discharge rate when the compressor is running at high frequency. While the performance of the compressor is reduced, the reliability risk of oil shortage inside the compressor is increased.

[0007] If an oil storage tank is provided on the inner wall of the flange for storing oil, the oil cannot effectively rise and fill the oil storage tank when the compressor is at low frequency due to the structure of the oil storage tank, which will cause the lubrication performance near the oil storage tank to decrease.

[0008] Since the compressor in the related art has a problem in which a large amount of lubricating oil is pumped out from the spiral oil groove on the upper flange of the pump body lubricating oil circuit and pumped into the lower cavity of the motor, and only relies on gravity to return, most of it is carried into the upper cavity of the motor by the impact of high-speed airflow and discharged from the compressor housing, resulting in an excessively high oil discharge rate of the compressor, and due to the setting of the oil storage tank, the lubrication capacity is reduced during low-frequency operation and other technical problems, the present invention discloses a research and design of a pump body oil circuit structure, a pump body, a compressor and an air conditioner.

[0009] Summary of the Invention

[0010] Therefore, the technical problem to be solved by the present disclosure is to overcome the defects of the compressor in the related art that the lubricating oil is easily carried into the upper cavity of the motor and discharged from the compressor housing by the impact of high-speed airflow, resulting in an excessively high oil discharge rate of the compressor, and the lubrication ability is reduced during low-frequency operation due to the setting of the oil storage tank, thereby providing a pump body oil circuit structure, a pump body, a compressor and an air conditioner.

[0011] In order to solve the above problems, the present disclosure provides a pump body oil circuit structure, which includes:

[0012] An upper flange, an upper oil groove and an oil return portion are provided on the inner wall of the shaft hole of the upper flange, the lower end of the upper oil groove can be used to suck oil, the upper oil groove extends upward along the inner wall of the shaft hole, the upper end of the upper oil groove is located at the top end of the upper flange or is spaced a preset distance from the top end of the upper flange, and the oil return portion is directly connected to the upper oil groove so that oil can be sucked from the upper oil groove and discharged into the oil pool of the compressor.

[0013] In some embodiments,

[0014] The upper end of the upper oil groove extends to the top of the upper flange, or the upper end of the upper oil groove is spaced from the top of the upper flange by a preset distance greater than 0. The oil return portion is a lower oil groove opened on the inner wall of the shaft hole of the upper flange. The lower oil groove extends downward along the inner wall of the shaft hole. The upper end of the lower oil groove is connected to a position between the upper and lower ends of the upper oil groove, or is connected to the upper end of the upper oil groove.

[0015] In some embodiments,

[0016] The oil return portion is a first oil return hole opened from the inner wall of the shaft hole of the upper flange toward the lower end surface of the upper flange, and the first oil return hole can conduct oil to the oil pool of the compressor.

[0017] In some embodiments,

[0018] The upper oil groove includes a first upper oil groove and a second upper oil groove, the lower end of the second upper oil groove is connected to the upper end of the first upper oil groove, and the flow cross-sectional area S2 of the second upper oil groove is smaller than the flow cross-sectional area S1 of the first upper oil groove, and the upper end of the second upper oil groove is connected to the top end of the upper flange.

[0019] In some embodiments,

[0020] The average width of the first upper oil groove is L1, the average width of the second upper oil groove is L2, and the parameters S1, S2, L1, and L2 satisfy: S1>5S2, L1>1.5L2.

[0021] In some embodiments,

[0022] When the oil return portion is a lower oil groove opened on the inner wall of the shaft hole of the upper flange, the flow cross-sectional area of ​​the lower oil groove is S3, and the parameters S1 and S3 satisfy: S3≤S1.

[0023] In some embodiments,

[0024] When the oil return portion is a lower oil groove opened on the inner wall of the shaft hole of the upper flange, the distance between the connecting position of the lower oil groove and the upper oil groove and the lower end surface of the upper flange is h2, the distance between the connecting position of the second upper oil groove and the first upper oil groove and the lower end surface of the upper flange is h1, and 0.3≤h2 / h1≤1.

[0025] In some embodiments,

[0026] When the oil return portion is a lower oil groove opened on the inner wall of the shaft hole of the upper flange, the lower oil groove is connected to the first upper oil groove to form a connecting position between the lower oil groove and the upper oil groove; or, the connecting position between the first upper oil groove and the second upper oil groove is connected to the lower oil groove to form a connecting position between the lower oil groove and the upper oil groove.

[0027] In some embodiments,

[0028] The upper end of the upper oil groove is spaced from the top end of the upper flange by a preset distance greater than 0, the distance between the connecting position of the lower oil groove and the upper oil groove and the lower end surface of the upper flange is h2, the distance between the upper end of the upper oil groove and the lower end surface of the upper flange is h1, and 0.3≤h2 / h1≤1.

[0029] In some embodiments,

[0030] The upper oil groove is a spiral oil groove structure opened on the inner wall of the upper flange, and the upper oil groove extends spirally upward from its lower end to its upper end, and the rotation direction of the upper oil groove from its lower end to its upper end is the same as the rotation direction of the crankshaft, and the upper flange is sleeved on the outer circumference of the crankshaft; the lower oil groove is a spiral oil groove structure opened on the inner wall of the upper flange, and the lower oil groove extends spirally downward from its upper end to its lower end, and the rotation direction of the lower oil groove from its lower end to its upper end is opposite to the rotation direction of the crankshaft.

[0031] In some embodiments,

[0032] An oil return inclined hole is also provided inside the upper flange. The oil return inclined hole extends downward at an angle, and the upper end of the oil return inclined hole is connected to the lower end of the lower oil groove. The lower end of the oil return inclined hole extends to the lower end surface of the upper flange so that the oil can be discharged into the oil pool below the upper flange.

[0033] In some embodiments,

[0034] The oil return inclined hole is a straight hole, which is inclined to both the horizontal and vertical directions. The angle between the extension direction of the oil return inclined hole and the axial clamping of the upper flange, and the angle between the extension direction of the oil return inclined hole and the horizontal clamping, the axial direction of the upper flange is along the vertical direction, and the axial end face of the upper flange is along the horizontal direction.

[0035] In some embodiments,

[0036] An annular flexible groove is also provided on the upper flange. The annular flexible groove is located on the outer periphery of the inner wall of the shaft hole and is spaced a preset distance from the inner wall of the shaft hole. The connecting end of the oil return inclined hole and the lower oil groove is located above the upper end of the annular flexible groove.

[0037] In some embodiments,

[0038] The pump body oil circuit structure also includes a cylinder and a lower flange, the cylinder is arranged between the upper flange and the lower flange; a cylinder connecting channel is provided on the cylinder, the oil return inclined hole is connected to the cylinder connecting channel, and the oil can be discharged into the oil pool through the cylinder connecting channel; or a cylinder connecting channel is provided on the cylinder and a lower flange connecting channel is provided on the lower flange, the oil return inclined hole is connected to the cylinder connecting channel and the lower flange connecting channel in sequence, and the oil can be discharged into the oil pool through the cylinder connecting channel and the lower flange connecting channel.

[0039] In some embodiments,

[0040] The cylinder connecting passage includes a second oil return hole and a third oil return hole arranged inside the cylinder, the second oil return hole extends along the axial direction of the cylinder and the upper end of the second oil return hole is opposite to and connected with the lower end of the oil return inclined hole, the third oil return hole extends along the radial direction of the cylinder, and one end of the third oil return hole is connected with the lower end of the second oil return hole, and the other end is connected to the radial outside of the cylinder.

[0041] The present disclosure also provides a pump body, which includes the pump body oil circuit structure described in any of the previous items, and also includes a crankshaft, which is inserted into the shaft hole of the upper flange; a center oil hole and a side oil hole are provided inside the crankshaft, the center oil hole extends along the axial direction of the crankshaft, and the side oil hole extends along the radial direction of the crankshaft, one end of the side oil hole is connected with the center oil hole, and the other end extends to connect with the radial outside of the crankshaft, and the side oil hole is opposite to the inner wall of the upper flange so that oil can be transported to the upper oil groove.

[0042] The present disclosure also provides a compressor, which includes the aforementioned pump body.

[0043] The present disclosure also provides an air conditioner, which includes the aforementioned compressor.

[0044] The present disclosure provides a pump oil circuit structure, a pump body, a compressor, and an air conditioner, which have the following beneficial effects:

[0045] 1. The present invention provides an upper oil groove and an oil return portion (preferably a lower oil groove or a first oil return hole) structure, which can effectively lubricate the crankshaft and the upper flange through the upper oil groove, and can guide the lubrication downward to the bottom of the upper flange through the lower oil groove or the first oil return hole, thereby effectively solving the problem of excessive oil discharge rate of the compressor caused by the lubricating oil entering the lower chamber of the motor upward, so that the lubricating oil returns to the bottom of the upper flange as much as possible without being discharged, thereby reducing the oil discharge rate; and compared with the prior application of the applicant of the present invention, the present invention directly connects the oil return portion with the upper oil groove, eliminates the structural form of the oil storage tank, and can continuously ensure the flow of lubricating oil when the compressor is operating at low frequency, so as to avoid the problem of the oil storage tank not being able to be filled and the lubrication performance near the oil storage tank being reduced. It can ensure that the oil can fill the upper oil groove at low frequency and enter the lower oil groove, thereby ensuring the lubrication performance of the upper flange, and solving the problem of reduced lubrication ability during low-frequency operation due to the setting of the oil storage tank.

[0046] 2. The present disclosure is further different from the prior application of the applicant of the present disclosure. The present disclosure can also divert the lubricating oil returning from the upper flange to a position closer to the bottom of the oil pool through the provision of an oil return inclined hole, so that the returning lubricating oil directly enters the oil pool below the oil level through the diversion channel, thereby optimizing the circulation of the pump body lubricating oil circuit inside the pump body, and avoiding the lubricating oil pumped out from the oil return flow channel from being directly radially sprayed onto the flange wall or the shell wall, causing the lubricating oil to hit the hollow cavity wall and splash into the lower cavity of the motor and flow out with the exhaust gas, for example, radially spraying onto the hollow cavity wall and causing part of the lubricating oil to enter the lower cavity of the motor, further improving the oil discharge rate and radial vibration problems of the compressor caused by this, and can further reduce the oil discharge rate compared with the prior application; therefore, it can further prevent oil discharge and can minimize the oil discharge rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] FIG1 is an assembly diagram of a conventional rotary compressor in the related art;

[0048] FIG2 is a cross-sectional view of the pump body assembly and the oil circuit structure (the upper end of the upper oil groove communicating with the flange) of Example 1 of the pump body oil circuit structure disclosed herein;

[0049] Figure 2-1 is a partial enlarged view of part K in Figure 2;

[0050] Figure 2-2 is a partial enlarged view of the structure and oil circuit of the upper flange in Figure 2;

[0051] FIG2-3 is a partial cross-sectional view taken along line AA in FIG2-2;

[0052] FIG2-4 is a partial cross-sectional view of BB in FIG2-1;

[0053] 3 is a cross-sectional view of the pump body assembly and the oil circuit structure of Example 2 of the pump body oil circuit structure disclosed herein (the upper oil groove is not connected to the upper end of the flange);

[0054] Figure 3-1 is a partial enlarged view of the structure and oil circuit of the upper flange in Figure 3;

[0055] FIG4-1 is a cross-sectional view of the pump body assembly and the oil circuit structure (the upper end of the upper oil groove communicating with the flange) of Example 3 of the pump body oil circuit structure disclosed herein;

[0056] FIG4-2 is a cross-sectional view of the pump body assembly and the oil circuit structure of Example 4 of the pump body oil circuit structure disclosed herein (the upper oil groove is not connected to the upper end of the flange);

[0057] FIG5-1 is a cross-sectional view of the pump body assembly and oil circuit structure (the upper end of the upper oil groove communicating with the flange) of Example 5 of the pump body oil circuit structure disclosed herein;

[0058] 5-2 is a cross-sectional view of the pump body assembly and the oil circuit structure of Example 6 of the pump body oil circuit structure disclosed herein (the upper oil groove is not connected to the upper end of the flange).

[0059] The reference numerals indicate:

[0060] 1. Pump body assembly; 11. Upper flange; 12. Cylinder; 13. Crankshaft; 14. Roller; 15. Lower flange; 2. Motor assembly; 21. Rotor assembly; 22. Stator assembly; 3. Distributor component; 4. Housing assembly; 5. Upper cover; 6. Lower cover; 7. Oil pool; 8. Oil guide plate; 111. Upper oil trough; 1111. First upper oil trough; 1112. Second upper oil trough; 131. Center oil hole; 132. Side oil hole; 112. Lower oil trough; 114. Flexible groove; 119. Oil return inclined hole; 113. First oil return hole; 121. Second oil return hole; 122. Third oil return hole; 151. Lower flange oil trough; 200. Oil return structure. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present disclosure and its application or use. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present disclosure.

[0062] 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 disclosure. As used herein, unless the context clearly indicates otherwise, the singular form is 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, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] Unless otherwise specifically stated, the relative arrangement of the parts and steps, the numerical expressions and the numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as being merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0064] In the description of the present disclosure, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present disclosure and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present disclosure; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0065] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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.

[0066] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this disclosure.

[0067] FIG1 is a diagram showing the background technology of the structure of the present disclosure.

[0068] Figure 1 shows a schematic diagram of the overall assembly structure of a conventional rotary compressor. A conventional rolling rotor compressor is primarily composed of a pump assembly 1, a motor assembly 2, a liquid distributor 3, a housing assembly 4, an upper cover 5, and a lower cover 6. The housing assembly 4, the upper cover 5, and the lower cover 6 form a sealed structure. The interior of the housing is primarily composed of two major components: the pump assembly 1 and the motor assembly 2. The pump assembly 1 includes the upper flange 11, cylinder 12, crankshaft 13, roller 14, and lower flange 15, all of which cooperate to form a sealed cavity. The motor assembly 2 includes the stator assembly 22 and the rotor assembly 21. A rotary compressor generates driving force on the pump crankshaft 13 through the electromagnetic force generated between the motor rotor assembly 21 and the stator assembly 22. Driven by the rotation of the crankshaft 13, the volume of the pump cavity continuously changes, causing periodic intake, compression, and exhaust. The oil-gas mixture discharged from the cavity of the pump body assembly 1 enters the lower cavity space of the motor, then passes through the motor circulation channel hole to the upper cavity of the motor, and then is discharged from the compressor into the air conditioning system (the circulation path is shown by the dotted arrow in Figure 1).

[0069] Lubrication between the various friction pairs of the compressor's pump assembly 1 primarily relies on oil circuits within the pump body to pump lubricating oil to the contact surfaces of the moving parts, thereby achieving lubrication, cooling, and heat dissipation. The oil circuit structure of the primary and secondary bearings of a conventional rolling rotor compressor is as follows: the crankshaft 13 is provided with a central oil hole 131. Side oil holes 132 are designed at the root of the major and minor shafts of the crankshaft, respectively, and extend through the central oil hole 131. An oil guide plate 8 of the oil pumping device is mounted in the central oil hole 131. The inner circumferences of the upper flange 11 and lower flange 15 are respectively provided with an upper oil groove 111 and a lower flange oil groove 151. A certain amount of lubricating oil is installed in the lower part of the shell (oil pool 7). When the compressor is running, under the action of the oil guide plate 8 in the center oil hole 131 of the crankshaft, the lubricating oil in the bottom oil pool 7 is pumped into the center oil hole 131, and is pumped to the ends of the inner circular surfaces of the lower flange 15 and the upper flange 11 respectively through the side oil holes 132 at the roots of the major and minor shafts of the crankshaft, and then pumped to the friction pair surfaces of the flange and the crankshaft through the upper oil groove 111 and the lower flange oil groove 151 on the flange respectively. The lubricating oil in the lower flange oil groove 151 is directly pumped into the oil pool, while the lubricating oil in the upper oil groove 111 is pumped out of the pump body into the lower cavity of the motor, thereby realizing oil circuit lubrication of the main and secondary bearings (as shown by the solid arrows in Figure 1).

[0070] When the compressor operates at high frequencies, the friction of the moving parts generates a large amount of heat energy. If the pump oil supply is insufficient, heat dissipation is insufficient, causing the pump body to heat up rapidly, heating the cylinder's working chamber and reducing volumetric efficiency. Simultaneously, the exhaust temperature rises rapidly, reducing motor efficiency and ultimately compressor performance. Furthermore, at high frequencies, the lubrication requirements between the contact surfaces of the moving parts are higher, especially between the crankshaft and the upper flange, which require sufficient lubrication. Furthermore, when the compressor is operating, the cavity is filled with oil droplets. One of the main sources of these oil droplets is the pump body's lubrication oil circuit, which is directly connected to the motor's lower cavity. Under the action of centrifugal force and gas force, the oil in the lubrication oil circuit enters the motor's upper cavity and is then discharged into the system. This results in a high oil discharge rate when the compressor operates at high frequencies, reducing compressor performance and increasing the reliability risk of oil shortage within the compressor.

[0071] In response to the technical problems existing in the above-mentioned conventional rolling rotor compressors, this patent proposal proposes an innovative oil circuit structure to realize the circulation of the lubricating oil circuit inside the pump body, increase the pumping oil volume between the upper flange and the crankshaft friction pair and the overall oil circuit, ensure the lubrication effect of the flange-crankshaft friction contact area, and prevent the lubricating oil from being carried into the upper and lower chambers of the motor with the high-speed exhaust airflow and discharged from the compressor, thereby reducing the oil discharge rate of the compressor.

[0072] As shown in Figures 2 to 5-2, the present disclosure provides a pump body oil circuit structure, which includes:

[0073] The upper flange 11 has an upper oil groove 111 and an oil return portion on the inner wall of the shaft hole of the upper flange. The lower end of the upper oil groove 111 can be used to suck in oil. The upper oil groove 111 extends upward along the inner wall of the shaft hole. The upper end of the upper oil groove 111 is located at the top of the upper flange 11 or is spaced a preset distance from the top of the upper flange 11. The oil return portion is directly connected to the upper oil groove 111 so that oil can be sucked in from the upper oil groove 111 and discharged into the oil pool of the compressor.

[0074] The present invention provides an upper oil groove and an oil return portion (preferably a lower oil groove or a first oil return hole) structure, which can effectively lubricate the crankshaft and the upper flange through the upper oil groove, and can guide the lubrication downward to the bottom of the upper flange through the lower oil groove or the first oil return hole, thereby effectively solving the problem of excessive oil discharge rate of the compressor caused by the lubricating oil entering the lower cavity of the motor upward, so that the lubricating oil returns to the bottom of the upper flange as much as possible without being discharged, thereby reducing the oil discharge rate; and compared with the prior application of the applicant of the present invention, the present invention directly connects the oil return portion with the upper oil groove, eliminates the structural form of the oil storage tank, and can continuously ensure the flow of lubricating oil when the compressor is operating at low frequency, so as to avoid the problem of the oil storage tank not being able to be filled and the lubrication performance near the oil storage tank being reduced. It can ensure that the oil can fill the upper oil groove at low frequency and enter the lower oil groove, thereby ensuring the lubrication performance of the upper flange, and solving the problem of reduced lubrication ability during low-frequency operation due to the setting of the oil storage tank.

[0075] The present disclosure provides a rolling rotor compressor pump assembly, comprising an upper flange, a cylinder, a crankshaft, rollers, and a lower flange. The crankshaft is provided with a central oil hole, and a side oil hole is provided at the root of the lower end of the crankshaft and the upper flange. The upper flange is provided with an upper oil groove and an oil return structure. The crankshaft central oil hole and the oil return structure are respectively connected to an oil pool, and the crankshaft central oil hole, the side oil holes, and the upper oil groove of the upper flange are connected in sequence. The oil return structure is connected to a position between the two ends of the upper oil groove of the upper flange. The crankshaft central oil hole, the side oil holes, the upper oil groove of the upper flange, and the oil return structure together constitute the pump oil return circulation channel of the pump body.

[0076] The present disclosure solves the following technical problems:

[0077] 1. A large amount of lubricating oil pumped out from the spiral oil groove on the upper flange of the pump body lubricating oil circuit is pumped into the lower cavity of the motor. It only relies on gravity to return. Most of it is carried into the upper cavity of the motor by the impact of high-speed airflow and discharged from the compressor housing, resulting in an excessively high oil discharge rate of the compressor, thereby affecting the performance and reliability of the compressor;

[0078] 2. When the oil level is low during low-frequency operation inside the compressor, the flange-crankshaft friction pair pump has insufficient oil, resulting in poor lubrication of the corresponding friction contact area and causing abnormal wear, which is a reliability issue.

[0079] Beneficial effects of the present disclosure:

[0080] 1. This disclosure proposes an innovative internal oil return structure for the pump lubricating oil circuit, which enables the lubricating oil circuit to circulate within the pump body. This prevents a large amount of lubricating oil pumped out of the spiral oil groove on the upper flange of the pump lubricating oil circuit from being pumped into the lower chamber of the motor and then being carried by the high-speed airflow into the upper chamber of the motor and discharged from the compressor housing. This significantly reduces the oil discharge rate of the compressor and improves compressor performance and reliability.

[0081] 2. The present disclosure proposes an innovative oil return structure for the lubricating oil circuit of the pump body, which directly connects the upper oil tank with the lower oil tank or the first oil return structure, and eliminates the oil storage tank in the prior patent application. Therefore, it can effectively ensure that during low-frequency operation, the oil will not be unable to enter the lower oil tank due to the oil storage tank not being full of lubricating oil, thereby solving the problem of reduced lubrication performance; thereby realizing the circulation of the lubricating oil circuit inside the pump body, increasing the oil pumping volume between the upper flange and the crankshaft friction pair and the overall oil circuit, ensuring the oil pumping volume and lubrication effect of the corresponding friction contact area, and reducing the reliability risk of wear of the crankshaft-flange friction pair due to poor lubrication.

[0082] As shown in FIG2 , it is a structural diagram of Example 1 of the present disclosure.

[0083] As shown in Figures 2-1 to 2-4, they are respectively a cross-sectional view and a partial enlarged view of the oil circuit structure of the pump body assembly of the embodiment of the present disclosure.

[0084] The present disclosure proposes a rolling rotor compressor pump body assembly 1, including an upper flange 11, a cylinder 12, a crankshaft 13, a roller 14 and a lower flange 15. A central oil hole 131 is provided on the crankshaft 13, and a side oil hole 132 is provided at the root of the lower end of the shaft section where the crankshaft 13 and the upper flange 11 are matched. An upper oil groove 111 and an oil return structure are provided on the upper flange 11. The oil return structure consists of a lower oil groove 112 and an oil return hole. The oil return hole is composed of an oil return inclined hole 119 provided inside the flange and a second oil return hole 121 provided inside the cylinder, which are connected in sequence. The inlet of the crankshaft central oil hole 131 and the second oil return hole 121 of the oil return structure are respectively connected to the oil pool 7, and the crankshaft central oil hole 131, the side oil hole 132 and the upper oil groove 111 of the upper flange 11 are connected in sequence, and one end of the lower oil groove 112 is connected to the position between the two ends of the upper oil groove 111. Thus, the crankshaft center oil hole 131, the side oil hole 132, the upper oil groove 111 of the upper flange and the lower oil groove 112 of the oil return structure, the oil return inclined hole 119, the second oil return hole 121 and the third oil return hole 122 together constitute the pump body oil return circulation channel.

[0085] In some embodiments,

[0086] The upper end of the upper oil groove 111 extends to the top of the upper flange 11, or the upper end of the upper oil groove 111 is spaced from the top of the upper flange 11 by a preset distance greater than 0. The oil return portion is a lower oil groove 112 opened on the inner wall of the shaft hole of the upper flange 11. The lower oil groove 112 extends downward along the inner wall of the shaft hole. The upper end of the lower oil groove 112 is connected to a position between the upper and lower ends of the upper oil groove 111, or is connected to the upper end of the upper oil groove 111.

[0087] In some embodiments,

[0088] As shown in Figures 5-1 and 5-2, the oil return portion is a first oil return hole 113 opened from the inner wall of the shaft hole of the upper flange 11 toward the lower end surface of the upper flange 11. The first oil return hole 113 can conduct oil to the oil pool of the compressor. The flange oil return structure preferably described in the present disclosure is a single oil return hole structure, with the two ends of the oil return hole respectively connected to the upper oil tank and the oil pool (it is further preferred that the first oil return hole 113 discharges oil into the oil pool through the oil return channel on the cylinder). It can also achieve the effect of circulating the oil in the upper oil tank back, avoiding the problem that the setting of the oil storage tank cannot make it full of lubricating oil, resulting in a decrease in lubrication performance.

[0089] As shown in Figures 5-1 and 5-2, they are structural schematic diagrams of embodiments 5 and 6 of the present disclosure.

[0090] In this embodiment, the upper flange oil return structure described in the present disclosure is composed only of an oil return hole structure. Similarly, the oil return hole is composed of a first oil return hole 113 provided inside the flange and a second oil return hole 121 provided inside the cylinder, which are connected in sequence. The inlet end of the first oil return hole 113 is connected to a position between the two ends of the upper oil groove 111, and the two ends of the second oil return hole 121 are respectively connected to the first oil return hole 113 and the oil pool. The crankshaft center oil hole 131, the side oil hole 132, the upper oil groove 111 and the oil return hole (first oil return hole 113 + second oil return hole 121) together constitute the pump body assembly pump oil return circulation flow channel.

[0091] In some embodiments,

[0092] The upper end of the upper oil groove 111 extends to the top of the upper flange 11, and the upper oil groove 111 includes a first upper oil groove 1111 and a second upper oil groove 1112. The lower end of the second upper oil groove 1112 is connected to the upper end of the first upper oil groove 1111, and the flow cross-sectional area S2 of the second upper oil groove 1112 is smaller than the flow cross-sectional area S1 of the first upper oil groove 1111, and the upper end of the second upper oil groove 1112 is connected to the top of the upper flange 11.

[0093] In the present invention, when the compressor is running at high frequency, the oil circuit's oil pumping capacity and oil pumping volume are relatively high. By designing a two-stage oil groove, in which the flow area of ​​the second upper oil groove close to the upper end surface is smaller than that of the first upper oil groove, the outlet flow area of ​​the upper oil groove can be reduced while ensuring the oil pumping volume and lubrication effect in the upper flange-crankshaft friction contact area. This achieves the following: minimizing the amount of lubricating oil pumped from the upper oil groove into the lower cavity of the motor, further reducing the amount of lubricating oil pumped out of the pump body oil circuit to the lower cavity of the motor, thereby reducing the oil discharge rate.

[0094] The upper oil groove 111 of the disclosed embodiment extends through the upper and lower end surfaces of the flange and comprises a first upper oil groove 1111 and a second upper oil groove 1112. The two ends of the first upper oil groove 1111 are connected to the crankshaft oil hole 132 and the inlet of the second upper oil groove 1112, respectively. The two ends of the second upper oil groove 1112 are connected to the outlet of the first upper oil groove 1111 and the upper end surface of the upper flange 11. One end of the lower oil groove 112 is connected to a point between the two ends of the first upper oil groove 1111.

[0095] In some embodiments,

[0096] The average width of the first upper oil groove 1111 is L1, the average width of the second upper oil groove 1112 is L2, and the parameters S1, S2, L1, and L2 satisfy: S1>5S2, L1>1.5L2.

[0097] The upper oil groove described in the present disclosure is preferably composed of a first upper oil groove and a second upper oil groove, which are spiral oil grooves that pass through the upper and lower end surfaces of the flange. The spiral rotation direction of the first upper spiral oil groove and the second upper spiral oil groove is the same and consistent with the rotation direction of the crankshaft. The two ends of the first upper oil groove are respectively connected to the crankshaft side oil hole and the inlet of the second upper oil groove, and the two ends of the second upper oil groove are respectively connected to the outlet of the first upper oil groove and the upper end surface of the flange. The flow cross-sectional area of ​​the second upper oil groove is smaller than the flow cross-sectional area of ​​the first upper oil groove. It is set that the flow cross-sectional area of ​​the first upper oil groove is S1, and the oil groove width is L1. The flow cross-sectional area of ​​the second upper oil groove is S2, and the oil groove width is L2. Preferably, the parameters S1, S2, L1, and L2 satisfy: S1>5S2, L1>1.5L.

[0098] When the compressor operates at high frequency, the oil circuit's oil pumping capacity and oil pumping volume are relatively high. By designing two oil grooves and the flow area of ​​the second upper oil groove close to the upper end surface being smaller than that of the first upper oil groove, the outlet flow area of ​​the upper oil groove can be reduced while ensuring the oil pumping volume and lubrication effect in the upper flange-crankshaft friction contact area, thereby achieving the following: minimizing the amount of lubricating oil pumped from the upper oil groove into the lower cavity of the motor, further reducing the amount of lubricating oil pumped out of the pump body oil circuit to the lower cavity of the motor, thereby reducing the oil discharge rate.

[0099] The present disclosure is shown in Figures 2-3, which are partial cross-sectional views of the first upper oil groove 1111 and the second upper oil groove 1112 of the upper spiral. It is assumed that the flow cross-sectional area of ​​the first upper oil groove 1111 is S1, and the oil groove width is L1. The flow cross-sectional area of ​​the second upper oil groove 1112 is S2, and the oil groove width is L2. The parameters S1, S2, L1, and L2 satisfy: S1>S2, L1>L2. Preferably, the parameters S1 and S2 satisfy: S1>5S2, L1>1.5L2. Thus, while ensuring the oil pumping volume and lubrication effect in the friction contact area, the amount of lubricating oil pumped into the lower chamber of the motor from the second upper oil groove 1112 is minimized as much as possible, further reducing the amount of lubricating oil pumped from the pump body oil circuit to the lower chamber of the motor, thereby reducing the oil discharge rate.

[0100] In some embodiments,

[0101] When the oil return portion is the lower oil groove 112 opened on the inner wall of the shaft hole of the upper flange 11 , the flow cross-sectional area of ​​the lower oil groove 112 is S3 , and the parameters S1 and S3 satisfy: S3 ≤ S1 .

[0102] In the present invention, when the compressor operates at low frequency, the oil pumping capacity and oil pumping amount are relatively low. The flow cross-sectional area S3 of the lower oil tank is designed to be smaller than the flow area S1 of the upper oil tank, thereby limiting the oil flow path resistance of the lower oil tank. This can avoid affecting the oil supply amount of the upper section of the upper oil tank located at the entrance of the lower oil tank due to the excessively small return oil flow path resistance.

[0103] Figures 2-4 show partial cross-sectional views of upper and lower oil tanks 111, 112. Furthermore, the cross-sectional area of ​​lower oil tank 112 is set to S3, and the parameters S1 and S3 satisfy the condition S3 ≤ S1. This prevents the oil supply to the upper section of upper oil tank 111, located at the entrance of lower oil tank 112, from being affected by insufficient resistance in the oil return path.

[0104] In some embodiments,

[0105] When the oil return portion is a lower oil groove 112 opened on the inner wall of the shaft hole of the upper flange 11, the distance between the connecting position of the lower oil groove 112 and the upper oil groove 111 and the lower end surface of the upper flange 11 is h2, the distance between the connecting position of the second upper oil groove 1112 and the first upper oil groove 1111 and the lower end surface of the upper flange 11 is h1, and 0.3≤h2 / h1≤1.

[0106] The flange pump oil return circulation channel disclosed herein is configured such that the distance between the upper edge of the upper oil groove outlet and the lower end face of the flange is h1, and the distance between the upper edge of the oil return structure and the flange upper oil groove and the lower end face of the flange is h2. The parameters h1 and h2 satisfy the following: 0.3≤h2 / h1≤1. This effectively ensures that the lower oil groove connection point is located between the upper and lower ends of the upper oil groove, and the connection point of the upper end of the lower oil groove is located between the upper and lower ends of the upper oil groove. The h1 and h2 parameters are preferably less than 1. This ensures that some oil enters the groove section above the connection point between the upper and lower oil grooves, ensuring lubrication of the area above the lower oil groove, further improving lubrication performance for the upper flange. Preferably, 0.45≤h2 / h1<0.75.

[0107] As shown in Figure 2-2, it is a cross-sectional view of the upper flange structure of the present disclosure. It is assumed that the distance between the upper edge point of the first upper oil groove outlet of the upper oil groove 111 and the lower end face of the flange is h1, and the distance between the upper edge point of the connection position between the lower oil groove 112 and the first upper oil groove 1111 and the lower end face of the flange is h2. The parameters h1 and h2 satisfy: 0.3≤h2 / h1≤1, preferably, 0.45≤h2 / h1<0.75, thereby further optimizing the oil pumping and oil return volume, ensuring that the upper section of the upper oil groove 111 located at the entrance of the lower oil groove 112 has sufficient oil pumping volume to meet the lubrication requirements, while not causing excessive oil pumping to cause a large amount of lubricating oil to be pumped into the lower chamber of the motor, thereby increasing the oil discharge rate of the compressor.

[0108] In some embodiments,

[0109] When the oil return portion is a lower oil groove 112 opened on the inner wall of the shaft hole of the upper flange 11, the lower oil groove 112 is connected to the first upper oil groove 1111 to form a connecting position between the lower oil groove 112 and the upper oil groove 111; or, the connecting position between the first upper oil groove 1111 and the second upper oil groove 1112 is connected to the lower oil groove 112 to form a connecting position between the lower oil groove 112 and the upper oil groove 111.

[0110] In the embodiment of the present disclosure, the lubricating oil flow path is as follows:

[0111] Path 1: Realize the lubrication oil supply on the flange-crankshaft friction pair surface

[0112] Oil pool 7 → crankshaft center oil hole 131 → crankshaft long axis root side oil hole 132 → first upper oil groove 1111 → second upper oil groove 1112 → flange upper end

[0113] Path 2: Realize the oil return flow circulation of the lubricating oil pump and increase the lubricating oil supply to the lower part of the flange-crankshaft friction pair

[0114] Oil pool 7 → crankshaft center oil hole 131 → side oil hole 132 at the root of the crankshaft long axis → upper oil groove 111 → oil return structure (lower oil groove 112 → oil return inclined hole 119 → second oil return hole 121) → oil pool 7

[0115] The above-mentioned pump body oil pumping and return oil circulation flow path disclosed in the present invention realizes the circulation of the lubricating oil circuit inside the pump body, increases the pumping oil volume between the upper flange and the crankshaft friction pair and the overall oil circuit, ensures the lubrication effect of the flange-crankshaft friction contact area, and prevents the lubricating oil from being carried into the upper and lower chambers of the motor with the high-speed exhaust airflow and discharged from the compressor, reduces the exhaust oil content, and thus reduces the oil discharge rate of the compressor.

[0116] As shown in Figure 2-2, the upper oil groove 111 of the disclosed embodiment can also be constructed as an oil groove that extends through the lower end surface of the flange but is disconnected from the upper end surface. This structure completely prevents lubricating oil from being pumped into the lower chamber of the motor, further effectively reducing the oil discharge rate of the compressor. In this embodiment, the aforementioned positional relationship parameter h1 is the distance between the upper edge of the upper oil groove 111 and the lower end surface of the flange.

[0117] In some embodiments,

[0118] The upper end of the upper oil groove 11 is spaced from the top of the upper flange 11 by a preset distance greater than 0, the distance between the connecting position of the lower oil groove 112 and the upper oil groove 111 and the lower end surface of the upper flange 11 is h2, the distance between the upper end of the upper oil groove 111 and the lower end surface of the upper flange 11 is h1, and 0.3≤h2 / h1≤1.

[0119] As shown in Figure 4-1, it is a structural diagram of Example 3 of the present disclosure.

[0120] This embodiment is a special example of the structure in Embodiment 1 when h1 / h2 = 1. In this embodiment, the inlet of lower oil trough 112 communicates with the upper end of first upper oil trough 1111 (or upper oil trough 111 when the second oil return trough is absent). Crankshaft center oil hole 131 and second oil return hole 121 are each connected to oil reservoir 7. Crankshaft center oil hole 131, side oil hole 132, upper oil trough 111, lower oil trough 112, and the oil return holes (oil return inclined hole 119 + second oil return hole 121) are sequentially connected end-to-end, forming the pump body's oil return circulation path.

[0121] In some embodiments,

[0122] The upper oil groove 111 is a spiral oil groove structure opened on the inner wall of the upper flange 11, and the upper oil groove 111 extends spirally upward from its lower end to its upper end, and the rotation direction of the upper oil groove 111 from its lower end to its upper end is the same as the rotation direction of the crankshaft, and the upper flange is sleeved on the outer circumference of the crankshaft; the lower oil groove 112 is a spiral oil groove structure opened on the inner wall of the upper flange 11, and the lower oil groove 112 extends spirally downward from its upper end to its lower end, and the rotation direction of the lower oil groove 112 from its lower end to its upper end is opposite to the rotation direction of the crankshaft.

[0123] The present disclosure sets the upper oil groove in the form of a spiral groove structure, and the rotation direction from the lower end to the upper end is the same as the rotation direction of the crankshaft, so that as the crankshaft rotates, the oil in the upper oil groove is effectively driven to flow into the oil storage tank. The present disclosure also sets the lower oil groove in the form of a spiral groove structure, and the rotation direction from the upper end to the lower end is the same as the rotation direction of the crankshaft, so that as the crankshaft rotates, the oil in the oil storage tank is effectively driven to flow into the lower oil groove, and then discharged to the bottom of the upper flange through the lower oil groove. That is, the present disclosure can effectively utilize the rotation of the crankshaft to drive the lubricating oil from the upper oil groove to pass through the oil storage tank and the lower oil groove in sequence to effectively lubricate the joint surface between the upper flange and the crankshaft through the design of the upper and lower spiral oil grooves.

[0124] Preferably, the first upper oil groove 1111 and the second upper oil groove 1112 of the present disclosure are spiral oil grooves, and the spiral rotation direction of the first upper oil groove 1111 and the second upper oil groove 1112 is the same and consistent with the rotation direction of the crankshaft. The spiral structure and the rotation of the crankshaft can provide an upward oil pumping driving force for the lubricating oil, reduce the oil pumping resistance, and optimize the oil pumping effect. Similarly, the lower oil groove 112 of the present disclosure is preferably a spiral oil groove, and the rotation direction of the lower spiral oil groove is opposite to the rotation direction of the pump body crankshaft, thereby providing a downward oil pumping driving force for the lubricating oil through the spiral structure and the rotation of the crankshaft, accelerating oil return and optimizing the oil circuit circulation flow effect. Alternatively, the second upper oil groove 1112 and the lower oil groove 112 of the present disclosure can also be set as an axial straight groove structure with a relatively weak oil pumping effect.

[0125] In some embodiments,

[0126] An oil return inclined hole 119 is also provided inside the upper flange 11. The oil return inclined hole 119 extends downward at an angle, and the upper end of the oil return inclined hole 119 is connected to the lower end of the lower oil groove 112. The lower end of the oil return inclined hole 119 extends to the lower end surface of the upper flange 11 so that the oil can be discharged into the oil pool below the upper flange 11.

[0127] The flange oil return structure described herein consists of a lower oil trough and an inclined oil return hole. The lower oil trough's two ends are connected to the upper oil trough and the inclined oil return hole, respectively. The inclined oil return hole's two ends are connected to the lower oil trough and the oil pool, respectively. Preferably, the lower oil trough is a spiral oil trough, rotating in the opposite direction of the pump crankshaft. The lower oil trough is located at one end of the flange's inner circumference, a certain distance from the flange's lower end surface, and is disconnected from the flange's flexible groove.

[0128] The present disclosure is further different from the prior application of the applicant of the present disclosure. The present disclosure can also divert the lubricating oil returning from the upper flange to a position closer to the bottom of the oil pool through the provision of an oil return inclined hole, so that the returning lubricating oil directly enters the oil pool below the oil level through the diversion channel, thereby optimizing the circulation of the pump body lubricating oil circuit inside the pump body, avoiding the lubricating oil pumped out from the oil return flow channel from being directly radially sprayed onto the flange wall or the shell wall, causing the lubricating oil to hit the hollow cavity wall and splash into the lower cavity of the motor and flow out with the exhaust gas, for example, radially spraying onto the hollow cavity wall and causing part of the lubricating oil to enter the lower cavity of the motor, further improving the oil discharge rate and radial vibration problems of the compressor caused by this, and can further reduce the oil discharge rate compared with the prior application; therefore, it can further prevent oil discharge and can minimize the oil discharge rate.

[0129] In some embodiments,

[0130] The oil return inclined hole 119 is a straight hole, which is inclined to the horizontal and vertical directions. The extension direction of the oil return inclined hole 119 and the axial direction of the upper flange 11 are at an angle of (0, 90°), and the extension direction of the oil return inclined hole 119 and the horizontal direction are at an angle of (0, 90°). The axial direction of the upper flange 11 is along the vertical direction, and the axial end face of the upper flange 11 is along the horizontal direction.

[0131] This is the preferred structural form of the oil return inclined hole disclosed in the present invention, that is, its extension direction is inclined at an angle to the vertical direction and also to the horizontal direction, which can guide the oil at the lower end of the lower oil tank to the lower end surface of the upper flange through the oil return inclined hole, rather than flowing horizontally to the hollow cavity and causing it to be impacted into the lower cavity of the motor above the upper flange, thereby further reducing the oil discharge rate.

[0132] In some embodiments, an annular flexible groove 114 is also provided on the upper flange 11. The annular flexible groove 114 is located on the outer periphery of the inner wall of the shaft hole and is spaced a preset distance from the inner wall of the shaft hole. The connecting end of the oil return inclined hole 119 and the lower oil groove 112 is located above the upper end of the annular flexible groove 114.

[0133] This is a further preferred position of the oil return inclined hole disclosed in the present invention, that is, the position where it connects with the lower end of the lower oil groove is located above the annular flexible groove, so that it will not be connected with the annular flexible groove, which can effectively prevent the oil in the lower oil groove from entering the annular flexible groove, and avoid the situation where the oil return inclined hole cannot absorb the oil.

[0134] One end of the flange inner surface of the lower oil groove 112 of the present disclosure is at a certain distance from the lower end surface of the flange and is not connected to the flexible groove 114 of the flange, thereby preventing the lubricating oil flowing out of the crankshaft side oil hole 132 from flowing through the flexible groove 114 to the oil return hole and directly returning to the oil pool, and cannot be effectively pumped to the friction pair through the upper oil groove 111.

[0135] In some embodiments, the pump body oil circuit structure also includes a cylinder 12 and a lower flange 15, and the cylinder 12 is arranged between the upper flange 11 and the lower flange 15; a cylinder connecting channel is provided on the cylinder 12, and the oil return inclined hole 119 is connected to the cylinder connecting channel, and the oil can be discharged into the oil pool through the cylinder connecting channel; or a cylinder connecting channel is provided on the cylinder 12 and a lower flange connecting channel is provided on the lower flange 15, and the oil return inclined hole 119 is connected to the cylinder connecting channel and the lower flange connecting channel in sequence, and the oil can be discharged into the oil pool through the cylinder connecting channel and the lower flange connecting channel.

[0136] The present invention can communicate with the cylinder connecting channel or with the cylinder connecting channel and the lower flange connecting channel in sequence through the oil return inclined hole on the upper flange, and can effectively guide the oil to the radial outside of the cylinder or the lower flange, thereby achieving the effect of effectively guiding the lubricating oil into the oil pool below the upper flange.

[0137] The present disclosure further provides a pump body, comprising the pump body oil circuit structure described in any of the preceding items, and further comprising a crankshaft 13, wherein the crankshaft 13 is inserted into the shaft hole of the upper flange 11. Alternatively, the second oil return hole of the drainage channel of the present disclosure may be provided on a cylinder or partition other than the pump body parts described in the single-cylinder or double-cylinder pump body assembly.

[0138] In some embodiments, a center oil hole 131 and a side oil hole 132 are provided inside the crankshaft 13, wherein the center oil hole 131 extends along the axial direction of the crankshaft 13, and the side oil hole 132 extends along the radial direction of the crankshaft 13, one end of the side oil hole 132 is connected with the center oil hole 131, and the other end extends to connect with the radial outside of the crankshaft 13, and the side oil hole 132 is opposite to the inner wall of the upper flange 11 so as to be able to transport oil to the upper oil groove 111.

[0139] The present disclosure also provides a compressor, which includes the aforementioned pump body.

[0140] The present invention discloses a compressor having a pump body assembly with the structural features described in the present invention. The compressor can be a single-cylinder, double-cylinder, or multi-cylinder rotor compressor, or a rotary cylinder compressor, a vane compressor, a scroll compressor, etc.

[0141] The present disclosure also protects an air conditioner and a compressor having the structural features described in the present disclosure.

[0142] The above description is merely a preferred embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present disclosure shall be included within the scope of protection of the present disclosure. The above description is merely a preferred embodiment of the present disclosure. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present disclosure, and such improvements and variations shall also be considered within the scope of protection of the present disclosure.

Claims

1. A pump body oil circuit structure, comprising: An upper flange (11), an upper oil groove (111) and an oil return portion are arranged on the inner wall of the shaft hole of the upper flange, the lower end of the upper oil groove (111) can be used to suck oil, the upper oil groove (111) extends upward along the inner wall of the shaft hole, the upper end of the upper oil groove (111) is located at the top end of the upper flange (11) or is spaced from the top end of the upper flange (11) by a preset distance, and the oil return portion is directly connected to the upper oil groove (111) so as to be able to suck oil from the upper oil groove (111) and lead it into the oil pool of the compressor.

2. The pump body oil circuit structure according to claim 1, wherein: The upper end of the upper oil groove (111) extends to the top end of the upper flange (11), or the upper end of the upper oil groove (111) is spaced from the top end of the upper flange (11) by a preset distance greater than 0, and the oil return portion is a lower oil groove (112) opened on the inner wall of the shaft hole of the upper flange (11), and the lower oil groove (112) extends downward along the inner wall of the shaft hole, and the upper end of the lower oil groove (112) is connected to a position between the upper end and the lower end of the upper oil groove (111), or is connected to the upper end of the upper oil groove (111).

3. The pump body oil circuit structure according to claim 1, wherein: The oil return portion is a first oil return hole (113) opened from the inner wall of the shaft hole of the upper flange (11) toward the lower end surface of the upper flange (11), and the first oil return hole (113) can conduct oil to the oil pool of the compressor.

4. The pump body oil circuit structure according to claim 2 or 3, wherein: The upper end of the upper oil groove (111) extends to the top end of the upper flange (11), and the upper oil groove (111) comprises a first upper oil groove (1111) and a second upper oil groove (1112), the lower end of the second upper oil groove (1112) is connected to the upper end of the first upper oil groove (1111), and the flow cross-sectional area S2 of the second upper oil groove (1112) is smaller than the flow cross-sectional area S1 of the first upper oil groove (1111), and the upper end of the second upper oil groove (1112) is connected to the top end of the upper flange (11).

5. The pump body oil circuit structure according to claim 4, wherein: The average width of the oil groove of the first upper oil groove (1111) is L1, the average width of the oil groove of the second upper oil groove (1112) is L2, and the parameters S1, S2, L1, L2 satisfy: S1>5S2, L1>1.5L2.

6. The pump body oil circuit structure according to claim 5, wherein: When the oil return portion is a lower oil groove (112) opened on the inner wall of the shaft hole of the upper flange (11), the flow cross-sectional area of ​​the lower oil groove (112) is S3, and the parameters S1 and S3 satisfy: S3≤S1.

7. The pump body oil circuit structure according to any one of claims 4 to 6, wherein: When the oil return portion is a lower oil groove (112) opened on the inner wall of the shaft hole of the upper flange (11), the distance between the connecting position of the lower oil groove (112) and the upper oil groove (111) and the lower end surface of the upper flange (11) is h2, the distance between the connecting position of the second upper oil groove (1112) and the first upper oil groove (1111) and the lower end surface of the upper flange (11) is h1, and 0.3≤h2 / h1≤1.

8. The pump body oil circuit structure according to claim 4, wherein: When the oil return portion is a lower oil groove (112) opened on the inner wall of the shaft hole of the upper flange (11), the lower oil groove (112) is connected to the first upper oil groove (1111) to form a connecting position between the lower oil groove (112) and the upper oil groove (111); or, the connecting position between the first upper oil groove (1111) and the second upper oil groove (1112) is connected to the lower oil groove (112) to form a connecting position between the lower oil groove (112) and the upper oil groove (111).

9. The pump body oil circuit structure according to claim 2, wherein: The upper end of the upper oil groove (111) is spaced from the top of the upper flange (11) by a preset distance greater than 0, the distance between the communicating position of the lower oil groove (112) and the upper oil groove (111) and the lower end surface of the upper flange (11) is h2, the distance between the upper end of the upper oil groove (111) and the lower end surface of the upper flange (11) is h1, and 0.3≤h2 / h1≤1.

10. The pump body oil circuit structure according to claim 2, wherein: The upper oil groove (111) is a spiral oil groove structure opened on the inner wall of the upper flange (11), and the upper oil groove (111) extends upward in a spiral from its lower end to its upper end, and the rotation direction of the upper oil groove (111) from its lower end to its upper end is the same as the rotation direction of the crankshaft, and the upper flange is sleeved on the outer circumference of the crankshaft; the lower oil groove (112) is a spiral oil groove structure opened on the inner wall of the upper flange (11), and the lower oil groove (112) extends downward in a spiral from its upper end to its lower end, and the The rotation direction of the lower oil groove (112) from its lower end to its upper end is opposite to the rotation direction of the crankshaft.

11. The pump body oil circuit structure according to claim 2, wherein: An inclined oil return hole (119) is also provided inside the upper flange (11), and the inclined oil return hole (119) extends obliquely downward, and the upper end of the inclined oil return hole (119) is connected to the lower end of the lower oil groove (112), and the lower end of the inclined oil return hole (119) extends to the lower end surface of the upper flange (11) so as to guide the oil into the oil pool below the upper flange (11).

12. The pump body oil circuit structure according to claim 11, wherein: The oil return inclined hole (119) is a straight hole, which is inclined with respect to both the horizontal direction and the vertical direction. The extending direction of the oil return inclined hole (119) and the axial direction of the upper flange (11) form an angle of (0, 90°), and the extending direction of the oil return inclined hole (119) and the horizontal direction form an angle of (0, 90°). The axial direction of the upper flange (11) is along the vertical direction, and the axial end face of the upper flange (11) is along the horizontal direction.

13. The pump body oil circuit structure according to claim 11, wherein: The upper flange (11) is also provided with an annular flexible groove (114), the flexible groove (114) is located on the outer periphery of the inner wall of the shaft hole and is spaced apart from the inner wall of the shaft hole by a preset distance, and the connecting end of the oil return inclined hole (119) and the lower oil groove (112) is located above the upper end of the flexible groove (114).

14. The pump body oil circuit structure according to claim 11, wherein: The pump body oil circuit structure also includes a cylinder (12) and a lower flange (15), wherein the cylinder (12) is arranged between the upper flange (11) and the lower flange (15); a cylinder connecting passage is arranged on the cylinder (12), and the oil return inclined hole (119) is connected to the cylinder connecting passage, and oil can be discharged into the oil pool through the cylinder connecting passage; or a cylinder connecting passage is arranged on the cylinder (12) and a lower flange connecting passage is arranged on the lower flange (15), and the oil return inclined hole (119) is connected to the cylinder connecting passage and the lower flange connecting passage in sequence, and oil can be discharged into the oil pool through the cylinder connecting passage and the lower flange connecting passage.

15. The pump body oil circuit structure according to claim 14, wherein: The cylinder communication passage includes a second oil return hole (121) and a first oil return hole (122) disposed inside the cylinder. Three oil return holes (122), wherein the second oil return hole (121) extends along the axial direction of the cylinder (12) and the upper end of the second oil return hole (121) is opposite to and communicates with the lower end of the oil return inclined hole (119), and the third oil return hole (122) extends along the radial direction of the cylinder (12), and one end of the third oil return hole (122) is communicated with the lower end of the second oil return hole (121) and the other end is connected to the radial outside of the cylinder (12).

16. A pump body, comprising the pump body oil circuit structure according to any one of claims 1 to 15, and further comprising a crankshaft (13), wherein the crankshaft (13) is inserted into the shaft hole of the upper flange (11); The crankshaft (13) is provided with a central oil hole (131) and a side oil hole (132) inside. The central oil hole (131) extends along the axial direction of the crankshaft (13), and the side oil hole (132) extends along the radial direction of the crankshaft (13). One end of the side oil hole (132) is connected to the central oil hole (131), and the other end extends to communicate with the radial outer side of the crankshaft (13). The side oil hole (132) is opposite to the inner wall of the upper flange (11) so as to be able to transport oil to the upper oil groove (111).

17. A compressor comprising the pump body according to claim 16.

18. An air conditioner comprising the compressor according to claim 17.

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