Compressor

Abstract

The utility model relates to the technical field of compressors, in particular to a compressor which comprises a main shaft and a rotating part which are rotationally connected, an oil supply channel is arranged in the main shaft, an outlet of the oil supply channel is located at the end of the main shaft, and one or two of the main shaft and the rotating part is / are provided with an oil guide structure. An oil guide channel is formed at the oil guide structure and communicated with the oil supply channel, the oil guide channel can extend to the radial outer side of the main shaft from the oil supply channel, the oil supply channel can supply oil to the radial outer side of the main shaft through the oil guide channel so as to guarantee that the radial outer side of the main shaft can be continuously and stably lubricated, the structure is simple, the cost is low, and the effect is obvious.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to a compressor. Background Technology

[0002] When the compressor is running normally, the moving scroll plate changes the volume of the compression chamber by revolving and translating, thereby compressing the gas. During this process, the bearing of the moving scroll plate is subjected to a huge load and needs to be well lubricated; otherwise, the bearing of the moving scroll plate is prone to wear.

[0003] See Figure 1-2 In related technologies, the lubrication method for the bearing of the moving scroll 2' is to deliver lubricating oil to the shaft head via the main shaft 1', and then supply oil to the bearing of the moving scroll 2' through the oil supply channel 11' at the shaft head. However, during compressor operation, the rotor assembly often moves in the direction of the scroll, which causes the flat surface of the main shaft 1' shaft head to come into contact with the bottom surface of the bearing hole of the moving scroll 2'. This prevents the lubricating oil in the oil hole of the main shaft 1' from being discharged normally, easily causing the bearing of the moving scroll 2' to wear due to insufficient oil supply. Utility Model Content

[0004] The purpose of this invention is to provide a compressor to solve the problem in related technologies where rotor assembly misalignment can cause wear at the connection between the moving scroll and the main shaft due to insufficient oil supply.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] This utility model provides a compressor, including a main shaft and a rotating component rotatably connected. The main shaft is provided with an oil supply channel, the outlet of which is located at the end of the main shaft. One or both of the main shaft and the rotating component are provided with an oil guiding structure. When the end of the main shaft abuts against the rotating component, an oil guiding channel is formed at the oil guiding structure. The oil guiding channel is connected to the oil supply channel and can extend from the oil supply channel to the radially outer side of the main shaft.

[0007] In one embodiment, the oil guiding structure is a groove, one end of which is connected to the oil supply channel and the other end extends to the radial outer side of the spindle, and the oil guiding channel is formed in the groove cavity.

[0008] In one embodiment, the oil guiding structure is a protrusion located between the end of the spindle and the rotating component, and a gap is formed between the end of the spindle and the rotating component to form the oil guiding channel.

[0009] In one embodiment, the protrusion is fixedly disposed at the end of the spindle, and the engagement between the protrusion and the rotating component includes at least one or any combination of point contact, line contact and surface contact.

[0010] In one embodiment, the surface of the protrusion is spherical, so that the protrusion and the rotating member form a point contact.

[0011] In one embodiment, the end of the spindle protrudes outwards towards the rotating member to form the protrusion, the surface of which is spherical; or...

[0012] The end of the spindle protrudes outward toward the rotating component to form the protrusion, and the surface of the protrusion is spherical.

[0013] In one embodiment, the protrusion is an annular flange with a break, the outlet of the oil supply channel is located inside the annular flange, the break connects the inner and outer sides of the annular flange, and the top of the annular flange can form line contact or surface contact with the rotating component.

[0014] In one embodiment, the center of the contact surface between the protrusion and the rotating member approaches the axis of the main shaft in the radial direction.

[0015] In one embodiment, the rotating component is a moving scroll plate, the compressor includes a main bearing housing, the main shaft passes through the main bearing housing and is rotatably connected to the main bearing housing, and the end of the main shaft is placed in the hub of the moving scroll plate to drive the moving scroll plate to move. An oil reservoir is provided on the main bearing housing, and the hub of the moving scroll plate is at least partially located in the oil reservoir. A flow channel is provided on the side wall of the main shaft, and the flow channel is used to connect the oil guide channel and the oil reservoir.

[0016] In one embodiment, a cross-section is provided on the side wall of the main shaft, the cross-section extending at least to the top of the main shaft, and there is a gap between the cross-section and the inner wall of the hub of the moving scroll disk, and the flow channel is formed between the cross-section and the inner wall of the hub of the moving scroll disk.

[0017] The beneficial effects of this utility model are as follows:

[0018] This invention provides a compressor in which, during normal operation, there is a gap between the end of the main shaft and the bottom of the rotating component. Oil flowing from the outlet of the oil supply channel can flow to the outer circumference of the main shaft from either the gap between the end of the main shaft and the rotating component or from the oil guide channel, thus lubricating the radially outer side of the main shaft. In case of malfunction, such as when the end of the main shaft abuts against the bottom of the rotating component, the gap may be insufficient, making it difficult for oil to flow out from the outlet of the oil supply channel. In this case, the oil in the oil supply channel can flow to the radially outer side of the main shaft through the oil guide channel, reducing oil path blockage caused by the contact between the end of the main shaft and the rotating component. This ensures continuous and stable lubrication between the radially outer side of the main shaft and the rotating component. The compressor has a simple structure, low cost, and significant effect. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the oil supply path in the related technology, in which oil is supplied from the oil supply channel of the spindle to the rotating position of the scroll plate.

[0020] Figure 2 This is a schematic diagram of the oil supply path when the spindle head and the bottom of the moving scroll plate are axially connected in the relevant technology.

[0021] Figure 3 This is a schematic diagram of the structure when the oil guiding structure is a groove in an embodiment of this utility model;

[0022] Figure 4 This is a schematic diagram showing the fit between the main shaft and the rotating component when the oil guiding structure is a groove in an embodiment of this utility model;

[0023] Figure 5 This is a schematic diagram of the structure of the oil guiding structure in this embodiment of the present invention when it is an annular flange;

[0024] Figure 6 This is a schematic diagram of the structure when the oil guiding structure is a boss in an embodiment of this utility model;

[0025] Figure 7 This is a schematic diagram of the structure when the oil guiding structure is spherical in an embodiment of this utility model;

[0026] Figure 8 This is a schematic diagram of the internal structure of the compressor in an embodiment of this utility model.

[0027] In the picture:

[0028] 1' Spindle; 11' Oil supply channel;

[0029] 2'. Moving vortex disk;

[0030] 1. Spindle; 11. Oil supply channel; 12. Oil guide structure; 13. Oil guide channel; 14. Cross-section;

[0031] 2. Rotating parts;

[0032] 3. Shell; 31. Oil reservoir;

[0033] 4. Oil pump assembly; 5. Stator; 6. Rotor; 7. Bearing; 8. Main bearing housing; 81. Oil reservoir; 9. Bottom bearing housing. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0035] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0038] like Figures 3 to 7As shown, an embodiment of this utility model provides a compressor, including a main shaft 1 and a rotating component 2 rotatably connected. An oil supply channel 11 is provided inside the main shaft 1, and the outlet of the oil supply channel 11 is located at the end of the main shaft 1. An oil guide structure 12 is provided on one or both of the main shaft 1 and the rotating component 2. When the end of the main shaft 1 abuts against the rotating component 2, an oil guide channel 13 is formed at the oil guide structure 12. The oil guide channel 13 communicates with the oil supply channel 11, and the oil guide channel 13 can extend from the oil supply channel 11 to the radial outer side of the main shaft 1, so as to guide the oil in the oil supply channel 11 to the radial outer side of the main shaft 1, thereby lubricating the radial outer side of the main shaft 1.

[0039] With this configuration, during normal operation, there is a gap between the end of the spindle 1 and the bottom of the rotating component 2. The oil flowing out of the outlet of the oil supply channel 11 can flow to the outer periphery of the spindle 1 from one or both of the gap between the end of the spindle 1 and the bottom of the rotating component 2 and the oil guide channel 13, thus lubricating the radial outer side of the spindle 1. When an abnormality occurs, for example, when the end of the spindle 1 abuts against the bottom of the rotating component 2, the gap between them is insufficient, making it difficult for the oil at the outlet of the oil supply channel 11 to flow out. In this case, the oil at the oil supply channel 11 can flow to the radial outer side of the spindle 1 through the oil guide channel 13, reducing the oil circuit blockage caused by the abutment between the end of the spindle 1 and the rotating component 2, thereby ensuring continuous and stable lubrication of the rotating position of the rotating component 2. The structure is simple, the cost is low, and the effect is obvious. The rotating component 2 can be a moving scroll or other rotating structure rotatably connected to the spindle 1. This solves the problem in related technologies where rotor assembly movement easily causes wear at the connection position between the moving scroll and the spindle 1 due to insufficient oil supply.

[0040] In this embodiment, the oil supply channel 11 refers to an oil passage connected to the oil storage device, which can guide the oil in the oil storage device to the end position of the main shaft 1. The oil guiding structure 12 can be, but is not limited to, a protruding structure or a recessed structure provided at the end of the main shaft 1 and the bottom of the rotating part 2, or it can be an oil guiding channel provided inside the main shaft 1 and the rotating part 2, which can ensure that the oil guiding channel 13 is connected to the oil supply channel 11 to realize the delivery of lubricating oil when the end of the main shaft 1 and the rotating part 2 are in contact.

[0041] The oil guide channel 13 extending radially outward from the oil supply channel 11 means that the oil guide channel 13 can extend radially outward from any position on the flow path of the oil supply channel 11 to the main shaft 1, ensuring that the oil at the oil supply channel 11 can flow outward. For example, when the oil guide structure 12 is a protruding or recessed structure provided at the end of the main shaft 1 and the bottom of the rotating member 2, the oil guide channel 13 can extend radially outward from the outlet of the oil supply channel 11 to the main shaft 1. Alternatively, when the oil guide structure 12 is an oil guide channel provided inside the rotating member 2, the inner cavity of the oil guide channel can extend radially outward from any side wall position on the oil supply channel 11 to the main shaft 1.

[0042] Optionally, one or more oil guide channels 13 may be provided. When multiple oil guide channels 13 are provided, multiple oil guide channels 13 can be connected to the oil supply channel 11, which can disperse the oil flowing out of the oil supply channel 11 to different positions on the outer periphery of the spindle 1, so as to lubricate the radial outer side of the spindle 1 at multiple points and improve the lubrication effect.

[0043] like Figures 3 to 4 As shown, in some embodiments, the oil guiding structure 12 is a groove, one end of which is connected to the oil supply channel 11, and the other end extends to the radial outer side of the spindle 1. The oil guiding channel 13 is formed in the groove cavity. With this configuration, the groove can be set on one or both of the end of the spindle 1 and the rotating member 2. When the end of the spindle 1 abuts against the bottom of the rotating member 2, only the upper opening of the groove will be closed, and the groove will still remain connected to the oil supply channel 11, and the oil will be guided to the outer periphery of the spindle 1. The structure is simple and easy to process, reducing the requirements for the shape of the end of the spindle 1 and the bottom shape of the rotating member 2. It can be applied to either a plane or a curved surface.

[0044] Optionally, the groove can be a straight groove or a curved groove, and the depth of the groove can be selected according to the required amount of lubricating oil and the lubrication location. In this embodiment, the groove can be formed at the end of the spindle 1, and the groove can be a straight groove.

[0045] like Figures 5 to 6 As shown, in some embodiments, the oil guiding structure 12 is a protrusion located between the end of the spindle 1 and the rotating part 2, and a gap is formed between the end of the spindle 1 and the rotating part 2 to form an oil guiding channel 13. With this configuration, in this embodiment, by setting a protrusion on one or both of the end face of the spindle 1 and the bottom of the rotating part 2, when an abnormality occurs during operation, the protrusion will abut against the bottom of the rotating part 2 before the end face of the spindle 1. A certain gap will be maintained between the end face of the spindle 1 and the bottom face of the rotating part 2. The oil guiding channel 13 will remain connected to the outlet of the oil supply channel 11 and will guide the oil to the radial outer side of the spindle 1 to lubricate the radial outer side of the spindle 1.

[0046] Optionally, the protrusion may be, but is not limited to, a spherical, hemispherical, annular, or conical structure, as long as it can provide support between the end of the spindle 1 and the bottom of the rotating part 2. The protrusion may be fixedly mounted on the end of the spindle 1 or the rotating part 2, or it may be a free-moving structure that is not connected to either the spindle 1 or the rotating part 2, such as a ball or a slider, as long as it can maintain a distance between the end of the spindle 1 and the rotating part 2.

[0047] like Figure 5 and Figure 8As shown, in some embodiments, the protrusion is fixedly disposed at the end of the spindle 1. Compared to the hole on the rotating component 2 for connecting the spindle 1, the end of the spindle 1 can be exposed, making the machining of the oil guiding structure 12 easier. The engagement between the protrusion and the rotating component 2 includes at least one or any combination of point contact, line contact, and surface contact. Point contact has a small contact area, reducing friction. Line contact has a larger contact area than point contact, but it is more effective in distributing loads. Surface contact has a large contact area, which facilitates stress distribution, can withstand larger loads, and reduces damage to the oil guiding channel 13.

[0048] In some embodiments, the surface of the protrusion is spherical, so that a point contact is formed between the protrusion and the rotating member 2, resulting in a small contact area. Furthermore, the spherical surface of the protrusion ensures a smooth contact position, facilitating the maintenance of a small contact area during relative rotation of the protrusion and the rotating member 2. Alternatively, the top of the protrusion can be a plane with an area much smaller than the end face area of ​​the spindle 1, allowing for a small surface contact between the protrusion and the rotating member 2.

[0049] In some embodiments, the end of the spindle 1 partially protrudes outward toward the rotating member 2 to form a protrusion, reducing the space occupied by the protrusion at the end of the spindle 1. The surface of the protrusion is spherical to reduce the contact area between the surface of the protrusion and the rotating member 2. The outlet of the oil supply channel 11 can be located on one side of the protrusion. The protrusion occupies only a small area on the spindle 1. The oil supply channel 11 is located at the end of the spindle 1 and on one side of the protrusion, which allows the oil supply channel 11 to have a larger outflow space and reduces the obstruction of the oil supply channel 11 by the protrusion.

[0050] Alternatively, the end of the spindle 1 can protrude outwards towards the rotating component 2 to form a bulge. The surface of the bulge is spherical, meaning the entire protruding end face of the spindle 1 is spherical. This increases the overall structural stability of the bulge and provides a larger contact range for the rotating component 2. When the rotating component 2 oscillates laterally during operation, different positions on the spherical surface of the bulge can allow the rotating component 2 at various tilt angles to contact it. Compared to a design where the bulge surface is a flat surface that abuts against the rotating component 2, this embodiment reduces excessive local stress concentration between the circumferential edge of the bulge and the rotating component 2, allowing the rotating component 2 to have a certain oscillation margin. The outlet of the oil supply channel 11 is located on the non-abutting surface of the bulge and communicates with the oil guide channel 13. The oil guide channel 13 formed by the non-abutting surface of the bulge and the rotating component 2 maintains communication with the oil supply channel 11, allowing the oil to flow out smoothly for lubrication.

[0051] Optionally, the center of the convex spherical surface may be located on the axis of the main shaft 1 or slightly radially offset from the axis of the main shaft 1, so as to adapt to the swing tendency of the rotating part 2 on the side of the axis of the main shaft 1, and make the force more uniform when the rotating part 2 swings on different sides.

[0052] like Figure 6 and Figure 8 As shown, in some embodiments, the protrusion is an annular flange with a break. The outlet of the oil supply channel 11 is located inside the annular flange. The break connects the inner and outer sides of the annular flange. The top of the annular flange can form line contact or surface contact with the rotating member 2. The annular flange can provide support in the circumferential direction of the axis of the main shaft 1, ensuring stable force on the rotating member 2 and reducing the relative positional offset between the rotating member 2 and the main shaft 1. Furthermore, by setting the break, the spaces on the inner and outer sides of the annular flange can be connected, so that the oil inside the annular flange can be smoothly output to the outer periphery of the main shaft 1.

[0053] Optionally, the centerline of the annular flange coincides with the axis of the main shaft 1, allowing the annular flange to rotate within a small range of contact with the rotating part 2, thereby reducing friction and vibration or unbalanced loads caused by eccentric setting.

[0054] like Figure 5 and Figure 8 As shown, in some embodiments, the center of the contact surface between the protrusion and the rotating member 2 is close to the axis of the main shaft 1 in the radial direction. That is, the center of the contact surface between the protrusion and the rotating member 2 can be located on the axis of the main shaft 1 or its extension line. Alternatively, the center of the contact surface between the protrusion and the rotating member 2 can also be slightly offset from the axis of the main shaft 1 in the radial direction. Regardless of point contact, line contact, or surface contact, the contact surface between the protrusion and the rotating member 2 can rotate approximately around the axis of the main shaft. This allows the contact area of ​​the protrusion on the rotating member 2 during the rotation of the main shaft 1 to be approximately maintained at the contact area with the rotating member 2 when the protrusion is not rotating. Moreover, this reduces wear on the rotating member 2 across the entire surface of the rotating member 2, reduces vibration or unbalanced loads caused by eccentric setting, and reduces the torsional moment on the protrusion.

[0055] Optionally, when there is point contact between the protrusion and the rotating part 2, the axis of the main shaft 1 can pass through the contact point between the protrusion and the rotating part 2.

[0056] Optionally, when there is a line contact between the protrusion and the rotating part 2, the axis of the main shaft 1 can pass through the midpoint of the contact line between the protrusion and the rotating part 2.

[0057] Optionally, when there is surface contact between the protrusion and the rotating member 2, the axis of the main shaft 1 can pass through the center of the contact surface between the protrusion and the rotating member 2.

[0058] like Figure 3 and Figure 7As shown, in some embodiments, the rotating component 2 is a moving scroll plate. The compressor includes a main bearing housing 8, and the main shaft 1 passes through the main bearing housing 8 and is rotatably connected to the main bearing housing 8. The end of the main shaft 1 is placed in the hub of the moving scroll plate to drive the moving scroll plate to move. An oil reservoir 81 is provided on the main bearing housing 8. At least part of the hub of the moving scroll plate is located in the oil reservoir 81. A flow channel is provided on the side wall of the main shaft 1. The flow channel is connected to the oil guide channel 13 and the oil reservoir 81. The flow channel can serve as a transition channel to connect the oil guide channel 13 and the oil reservoir 81. It can also enhance the lubrication between the radial outer side of the main shaft 1 and the moving scroll plate. The oil storage space formed by the flow channel facilitates the continuous supply of oil and maintains the stability of the lubrication effect.

[0059] Optionally, the flow channel may be, but is not limited to, a strip groove or cross-section on one or both of the side wall of the main shaft 1 and the side wall of the connecting groove, as long as it can form a certain oil storage space to ensure the lubrication effect.

[0060] like Figures 3 to 7 As shown, in some embodiments, a cross-section 14 is provided on the side wall of the main shaft 1. The cross-section 14 extends at least to the top position of the main shaft 1. There is a gap between the cross-section 14 and the inner wall of the hub of the moving scroll disk to form a flow channel. The oil guide channel 13 is connected to the flow channel, that is, the oil can flow into the flow channel to lubricate the side wall position of the main shaft 1. The flow channel has a certain liquid storage space to facilitate the continuous supply of oil. Moreover, the oil can flow out from the top of the main shaft 1 to the connecting structure such as the bearing 7 for further lubrication.

[0061] Optionally, the cut surface 14 may also extend downward to the other end of the spindle 1 or to the lower end of the connecting structure such as the bearing 7, so that oil can also enter the lower end of the connecting structure such as the bearing 7 to enhance lubrication.

[0062] like Figure 4 and Figure 7 As shown, in some embodiments, a bearing 7 is provided on the rotating component 2. The oil in the oil supply channel 11 can flow through the oil guide channel 13 and the flow channel to lubricate the bearing 7. Regardless of the height of the oil guide channel 13 and the end face of the bearing 7, the oil guide channel 13 can be connected to the flow channel. The oil flowing out of the oil guide channel 13 flows into the rotating area between the inner and outer rings of the bearing 7 through the flow channel, which can realize the lubrication between the spindle 1 and the rotating component 2 and ensure the lubrication effect.

[0063] Optionally, the height of the oil guide channel 13 is equal to or higher than the end face of the bearing 7, and the oil flowing out of the oil guide channel 13 can flow into the bearing 7. Alternatively, the oil guide channel 13 is connected to the flow channel, and the oil flowing out of the oil guide channel 13 flows into the bearing 7 through the flow channel.

[0064] like Figures 3 to 8As shown, in some embodiments, the compressor further includes a housing 3 and an oil pump assembly 4. The housing 3 has an oil storage chamber 31. The oil pump assembly 4 is disposed in the oil storage chamber 31 and connected to the main shaft 1. The oil pump assembly 4 is used to pump the oil in the oil storage chamber 31 into the oil supply channel 11. The oil pump assembly 4 includes an oil pump. The type of oil pump may be, but is not limited to, a vane oil pump and a positive displacement oil pump.

[0065] In addition, the compressor also includes a stator 5 and a rotor 6. The stator 5 is fixedly mounted on the inner wall of the housing 3, and the rotor 6 is fixedly mounted on the main shaft 1. The rotor 6 and the main shaft 1 can rotate relative to the stator 5. A main bearing housing 8 and a bottom bearing housing 9 can be fixedly mounted inside the housing 3. The main bearing housing 8 is located above the stator 5 and is used to provide rotational support for one end of the main shaft 1 and the moving scroll plate. The bottom bearing housing 9 can be located below the stator 5 and is used to provide rotational support for the other end of the main shaft 1.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A compressor comprising a main shaft (1) and a rotating component (2) rotatably connected, characterized in that, The main shaft (1) is provided with an oil supply channel (11), the outlet of the oil supply channel (11) is located at the end of the main shaft (1), and one or both of the main shaft (1) and the rotating member (2) are provided with an oil guide structure (12). When the end of the main shaft (1) abuts against the rotating member (2), an oil guide channel (13) is formed at the oil guide structure (12). The oil guide channel (13) is connected to the oil supply channel (11), and the oil guide channel (13) can extend from the oil supply channel (11) to the radial outer side of the main shaft (1).

2. The compressor according to claim 1, characterized in that, The oil guiding structure (12) is a groove, one end of which is connected to the oil supply channel (11), and the other end extends to the radial outer side of the main shaft (1). The oil guiding channel (13) is formed in the groove cavity.

3. The compressor according to claim 1, characterized in that, The oil guiding structure (12) is a protrusion located between the end of the main shaft (1) and the rotating member (2), and a gap is formed between the end of the main shaft (1) and the rotating member (2) to form the oil guiding channel (13).

4. The compressor according to claim 3, characterized in that, The protrusion is disposed at the end of the main shaft (1), and the engagement between the protrusion and the rotating part (2) includes at least one or any combination of point contact, line contact and surface contact.

5. The compressor according to claim 4, characterized in that, The surface of the protrusion is spherical, so that the protrusion and the rotating member (2) form a point contact.

6. The compressor according to claim 5, characterized in that, The end of the main shaft (1) protrudes outward toward the rotating member (2) to form the protrusion, the surface of which is spherical; or, The end of the main shaft (1) protrudes outward toward the rotating member (2) to form the protrusion, the surface of which is spherical.

7. The compressor according to claim 4, characterized in that, The protrusion is an annular flange with a break. The outlet of the oil supply channel (11) is located inside the annular flange. The break connects the inner and outer sides of the annular flange. The top of the annular flange can form a line contact or surface contact with the rotating part (2).

8. The compressor according to claim 4, characterized in that, The center of the contact surface between the protrusion and the rotating member (2) approaches the axis of the main shaft (1) in the radial direction.

9. The compressor according to any one of claims 1-8, characterized in that, The rotating component (2) is a moving scroll plate. The compressor includes a main bearing housing (8). The main shaft (1) passes through the main bearing housing (8) and is rotatably connected to the main bearing housing (8). The end of the main shaft (1) is placed in the hub of the moving scroll plate to drive the moving scroll plate to move. An oil reservoir (81) is provided on the main bearing housing (8). At least part of the hub of the moving scroll plate is located in the oil reservoir (81). A flow channel is provided on the side wall of the main shaft (1). The flow channel is used to connect the oil guide channel (13) and the oil reservoir (81).

10. The compressor according to claim 9, characterized in that, A cut surface (14) is provided on the side wall of the main shaft (1), the cut surface (14) extends at least to the top position of the main shaft (1), there is a gap between the cut surface (14) and the inner wall of the hub of the moving scroll disk, and the flow channel is formed between the cut surface (14) and the inner wall of the hub of the moving scroll disk.

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