A kind of oil discharge structure with shaft end face lubrication function on scroll compressor

Abstract

The utility model provides a kind of oil discharge structure for scroll compressor with shaft end face lubrication function, it is related to scroll compressor internal lubricating oil circulation structure technical field, when compressor operates, rotating shaft starts to drive shaft lower end portion oil pump rotation, oil pump is rotated to the outer surface of auxiliary support part rotating shaft and the inner surface of auxiliary support copper bush through rotating shaft center hole and auxiliary shaft transverse hole oil supply, oil storage chamber is formed at the outer surface oil tank of auxiliary support part rotating shaft and the inner surface of auxiliary support copper bush, and the clearance between the upper surface of thrust sheet and copper bush and auxiliary support lower surface gap place.Oil in oil storage chamber passes through the outer side through-hole of thrust sheet by auxiliary support lower surface oil guide channel, flows to one end of oil pump cylinder body oil inlet channel, lubricating oil flows into the inner side through-hole of thrust sheet from the other end of oil pump cylinder body oil inlet channel, flows to oil pump cylinder body oil discharge channel along the rotating direction of rotating shaft, realize that the lower end surface of rotating shaft and thrust sheet contact surface are fully lubricated by lubricating oil, and the function of re-oil.

Description

Technical Field

[0001] This utility model relates to an oil unloading structure with shaft end face lubrication function for a scroll compressor, and is particularly related to the technical field of internal lubricating oil circulation structure of scroll compressors, and to scroll compressors with shaft end face oil lubrication and copper sleeve gap oil discharge. Background Technology

[0002] The existing scroll compressor's rotating shaft is supported by a main support copper sleeve at the upper part of the main shaft and a copper sleeve at the lower part of the auxiliary shaft. A thrust washer limits the lower end face of the rotating shaft, preventing it from falling axially. To prevent wear between the rotating shaft and the copper sleeves of the main and auxiliary shafts during rotation, oil supply channels and oil grooves are provided on the main and auxiliary shafts to lubricate the copper sleeves and manage lubricant splashing between the sleeves.

[0003] However, during compressor operation, friction and wear are likely to occur between the lower end face of the rotating shaft and the contact surface of the thrust plate. Especially when the compressor is running at high speed, the friction surface is accelerated, causing abnormal wear. This results in deep grooves and scratches on the lower end face of the rotating shaft and the contact surface of the thrust plate. During rotation, the friction force increases, the compressor input force increases, the compressor energy efficiency decreases, and the compressor reliability declines.

[0004] Regarding the prevention of lubricating oil splashing in the gap of the copper bushing, patent publication number CN110226041B discloses a combined structure of a thrust washer and an oil pump cylinder, which allows the lubricating oil that has lubricated the auxiliary bearing to return to the oil reservoir in the lower cover of the compressor. However, the return of lubricating oil to the oil reservoir in the lower cover of the compressor does not adequately lubricate the lower end face of the rotating shaft and the contact surface of the thrust washer, thus failing to reduce the friction and wear between the lower end face of the rotating shaft and the contact surface of the thrust washer, and also failing to solve the problem of low compressor efficiency and poor reliability caused by abnormal wear between the lower end face of the rotating shaft and the contact surface of the thrust washer.

[0005] To address the problems existing in the prior art, it is essential to research and design an oil discharge structure with shaft end face lubrication function for scroll compressors. The lubricating oil needs to be discharged after passing through the contact surface between the lower end face of the rotating shaft and the thrust plate. Overcoming the problems existing in the prior art is very necessary. Utility Model Content

[0006] To address the technical problem of abnormal wear between the lower end face of the rotating shaft and the contact surface of the thrust plate in the prior art, this invention provides an oil unloading structure with shaft end face lubrication function for scroll compressors. This invention primarily ensures that during the return of lubricating oil that has lubricated the auxiliary bearing to the oil reservoir in the lower cover of the compressor, the lubricating oil first flows through the contact surface between the lower end face of the rotating shaft and the thrust plate, and then flows out only into the oil reservoir in the lower cover of the compressor. This achieves sufficient lubrication of the contact surface between the lower end face of the rotating shaft and the thrust plate, reducing friction and wear, and improving the reliability and energy efficiency of the compressor.

[0007] The technical means adopted in this utility model are as follows: An oil unloading structure for a scroll compressor with shaft end face lubrication function includes a rotating shaft, a copper sleeve embedded in a secondary support, a thrust plate mounted on the lower end face of the secondary support to prevent the rotating shaft from falling after passing through the copper sleeve, an oil pump cylinder body mounted on the lower end of the thrust plate, and an oil pump located at the center of the oil pump cylinder body. The rotating shaft has an oil supply hole at its center, and an oil groove and a horizontal hole connecting the oil groove and the oil supply hole are provided at the lower end of the rotating shaft where it mates with the copper sleeve. The oil guide channel on the lower end face of the secondary support; The thrust plate includes an outer through hole and an inner through hole. The outer through hole is connected to the oil guide channel, and the inner through hole only contacts the lower end face of the rotating shaft. The oil pump cylinder body is provided with an oil inlet channel and an oil outlet channel. The two ends of the oil inlet channel are respectively connected to an outer through hole and an inner through hole, and the oil outlet channel is connected to the inner through hole.

[0008] Furthermore, the secondary support is embedded with a copper sleeve, and the lower end of the copper sleeve is spaced L away from the lower end of the secondary support. After the rotating shaft is assembled with the secondary support, the copper sleeve and the thrust plate, an oil storage chamber for the secondary support is formed.

[0009] Furthermore, the oil guide channel is connected to the secondary support oil storage chamber.

[0010] Furthermore, the oil pump cylinder body has an oil inlet channel and an oil outlet channel respectively on the mating surface with the thrust plate; The oil discharge channel includes an inflow channel and an outflow channel, the inflow channel and the outflow channel are connected, and the outflow channel passes through the side surface or lower surface of the oil pump cylinder.

[0011] Furthermore, the inflow channel is connected to the inner through hole.

[0012] Furthermore, the inner through hole is an annular groove, and the inner through hole includes an annular groove oil inlet hole, an annular groove oil outlet hole, and an annular groove oil guide channel connecting the two.

[0013] Furthermore, the annular groove oil inlet is located on the side of the starting direction of rotation of the rotating shaft, and the annular groove oil outlet is located on the side of the ending direction of rotation; The oil inlet hole of the annular groove is connected to the oil storage chamber of the auxiliary support in sequence through the oil inlet channel, the outer through hole and the oil guide channel, and the oil outlet hole of the annular groove is connected to the oil outlet channel.

[0014] The lubrication function and oil unloading principle of the shaft end face are as follows: When the compressor is running, the rotating shaft starts to drive the oil pump at the lower end of the rotating shaft to rotate. The oil pump supplies oil to the outer surface of the rotating shaft and the inner surface of the copper sleeve of the auxiliary support part through the central hole and the transverse hole of the rotating shaft. Oil storage chambers are formed at the oil groove on the outer surface of the rotating shaft of the auxiliary support part, the inner surface of the copper sleeve, the upper surface of the thrust plate, and the gap between the copper sleeve and the lower surface of the auxiliary support. The lubricating oil in the oil storage chamber flows through the oil guide channel on the lower surface of the auxiliary support, through the through hole on the outer side of the thrust plate, and flows to one end of the oil inlet channel of the oil pump cylinder. The lubricating oil flows from the other end of the oil inlet channel of the oil pump cylinder into the through hole on the inner side of the thrust plate, and flows to the oil discharge channel of the oil pump cylinder in the direction of rotation of the rotating shaft. This realizes that the contact surface between the lower end face of the rotating shaft and the thrust plate is fully lubricated by the lubricating oil, and then the oil is discharged.

[0015] Compared with the prior art, the present invention has the following advantages: The oil unloading structure with shaft end face lubrication function provided by this utility model for a scroll compressor has an oil guide channel on the lower surface of the auxiliary support, a through hole in the thrust plate, and an oil inlet channel and an oil outlet channel on the upper surface of the oil pump cylinder. This allows the assembled structure to guide the lubricating oil to flow first through the contact surface between the lower end face of the rotating shaft and the thrust plate, lubricate the contact surface, and then discharge it. This reduces the friction and wear between the lower end face of the rotating shaft and the contact surface of the thrust plate, and improves the reliability and energy efficiency of the compressor. In summary, the technical solution of this utility model solves the problem of low compressor efficiency and poor reliability caused by abnormal wear between the lower end face of the rotating shaft and the contact surface of the thrust plate. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model or the technical solutions of the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a longitudinal cross-sectional view of the scroll compressor in this embodiment; Figure 2 This is a cross-sectional view of the oil unloading structure in this implementation. Figure 3 This is a top view of the lower end face of the secondary support in this embodiment; Figure 4 This is a top view of the paving material during the implementation phase. Figure 5 This is a schematic diagram of the through hole inside the push plate during the termination of this implementation; Figure 6 This is a top view of the oil pump cylinder block in this embodiment; Figure 7 This is a top view of the oil passage after the pusher plate and oil pump cylinder body are installed on the lower end face of the auxiliary support.

[0018] In the diagram: 1. Housing; 2. Main support; 3. Secondary support; 31. Oil guide channel; 4. Motor; 5. Rotating shaft; 51. Oil supply hole; 52. Horizontal hole; 53. Oil groove; 6. Moving scroll plate; 7. Fixed scroll plate; 8. Cross ring; 9. Copper sleeve; 10. Intake pipe; 11. Exhaust pipe; 12. Thrust plate; 121. Outer through hole; 122. Inner through hole; 122a. Annular groove oil inlet hole; 122b. Annular groove oil guide channel; 122c. Annular groove oil outlet hole; 13. Oil pump cylinder body; 131. Oil inlet channel; 132. Oil outlet channel; 132a. Inflow channel; 132b. Outflow channel; 14. Oil pump. Detailed Implementation

[0019] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0022] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0023] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0024] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0025] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0026] This utility model provides a technical solution: an oil unloading structure with shaft end face lubrication function for a scroll compressor, such as... Figure 1 As shown, the scroll compressor includes: a housing 1 and a main support 2 and a secondary support 3 installed inside the housing 1; a rotating shaft 5 and a motor 4 installed between the main support 2 and the secondary support 3; a moving scroll 6 installed on the upper end of the rotating shaft 5, and a fixed scroll 7 and a cross ring 8 that cooperate with the moving scroll 6; an intake pipe 10 and an exhaust pipe 11 are also provided on the housing 1; a copper sleeve 9 embedded in the secondary support 3, a thrust plate 12 installed on the lower end face of the secondary support 3 to prevent the rotating shaft 5 from falling after passing through the copper sleeve 9, an oil pump cylinder 13 installed on the lower end of the thrust plate 12, and an oil pump 14 located at the center of the oil pump cylinder; like Figure 2 As shown, an oil supply hole 51 is opened at the center of the rotating shaft 5; at the lower end of the rotating shaft 5 where it mates with the copper sleeve 9, an oil groove 53 and a transverse hole 52 passing through the oil groove 53 and the oil supply hole 51 are opened; the copper sleeve 9 is embedded in the auxiliary support 3, and the lower end of the copper sleeve 9 is a certain distance L from the lower end of the auxiliary support 3; after assembly, the outer surface of the rotating shaft 5, the inner surface of the auxiliary support 3, the inner surface of the copper sleeve 9, and the upper surface of the thrust plate 12 form the auxiliary support oil storage chamber.

[0027] like Figure 2 , Figure 3 As shown, an oil guide channel 31 is opened on the lower end face of the auxiliary support 3, which is connected to the oil storage chamber of the auxiliary support 3; like Figure 2 , Figure 4 As shown, the thrust plate 12 includes an outer through hole 121 and an inner through hole 122. After the thrust plate 12 is assembled on the lower end face of the auxiliary support 3, the outer through hole 121 is connected to the oil guide channel 31, and the inner through hole 122 only contacts the lower end face of the rotating shaft 5 and is not directly connected to the oil reservoir of the auxiliary support.

[0028] like Figure 2 , Figure 6 As shown, the oil pump cylinder 13 has an oil inlet channel 131 and an oil outlet channel 132 respectively on the mating surface with the thrust plate 12. The oil outlet channel 132 includes an inflow channel 132a and an outflow channel 132b. One end of the inflow channel 132a is connected to the outflow channel 132b. The outflow channel 132b passes through the side surface of the oil pump cylinder 13 and can discharge the lubricating oil out of the oil pump cylinder 13.

[0029] like Figure 7 As shown, after the oil pump cylinder body 13 is installed on the lower surface of the thrust plate 12, one end of the oil inlet channel 131 is connected to the outer through hole 121, and the other end is connected to the inner through hole 122. The oil outlet channel 132 is connected to the inner through hole 122.

[0030] like Figure 2 , 5As shown, the inner through hole 122 is an annular groove-shaped through hole, including an annular groove oil inlet hole 122a, an annular groove oil outlet hole 122c, and an annular groove oil guide channel 122b connecting the two. The annular groove oil inlet hole 122a is opened in the starting direction of the rotation of the rotating shaft 5 when the thrust plate 12 contacts the lower end of the rotating shaft 5, and the annular groove oil outlet hole 122c is opened in the ending direction of the rotation of the rotating shaft 5 when the thrust plate 12 contacts the lower end of the rotating shaft 5. After assembly, the annular groove oil inlet hole 122a communicates with the auxiliary support oil reservoir through the oil inlet channel 131, the outer through hole 121, and the oil guide channel 31 in sequence; the annular groove oil outlet hole 122c communicates with the oil outlet channel 132.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An oil unloading structure with shaft end face lubrication function for a scroll compressor, characterized in that, Includes a rotating shaft (5), a copper sleeve (9) embedded in the secondary support (3), a thrust plate (12) mounted on the lower end face of the secondary support (3) to prevent the rotating shaft (5) from falling after passing through the copper sleeve (9), an oil pump cylinder (13) mounted on the lower end of the thrust plate (12), and an oil pump (14) located at the center of the oil pump cylinder. The rotating shaft (5) has an oil supply hole (51) at its center, and an oil groove (53) and a transverse hole (52) connecting the oil groove (53) and the oil supply hole (51) are provided at the lower end of the rotating shaft (5) where it meets the copper sleeve (9). The lower end face of the secondary support (3) has an oil guide channel (31). The thrust plate (12) includes an outer through hole (121) and an inner through hole (122). The outer through hole (121) is connected to the oil guide channel (31), and the inner through hole (122) only contacts the lower end face of the rotating shaft (5). The oil pump cylinder (13) is provided with an oil inlet channel (131) and an oil outlet channel (132). The two ends of the oil inlet channel (131) are respectively connected to the outer through hole (121) and the inner through hole (122), and the oil outlet channel (132) is connected to the inner through hole (122).

2. The oil unloading structure with shaft end face lubrication function for a scroll compressor according to claim 1, characterized in that, The auxiliary support (3) is embedded with a copper sleeve (9). The lower end of the copper sleeve (9) is spaced L away from the lower end of the auxiliary support (3). After the rotating shaft (5) is assembled with the auxiliary support (3), the copper sleeve (9) and the thrust plate (12), the auxiliary support oil storage chamber is formed.

3. The oil unloading structure with shaft end face lubrication function for a scroll compressor according to claim 2, characterized in that, The oil guide channel (31) is connected to the auxiliary support oil storage chamber.

4. The oil unloading structure for a scroll compressor with shaft end face lubrication function according to claim 1, characterized in that, The oil pump cylinder body (13) has an oil inlet channel (131) and an oil outlet channel (132) respectively on the mating surface with the thrust plate (12). The oil discharge channel (132) includes an inflow channel (132a) and an outflow channel (132b). The inflow channel (132a) and the outflow channel (132b) are connected, and the outflow channel (132b) penetrates the side surface or the bottom surface of the oil pump cylinder (13).

5. The oil unloading structure for a scroll compressor with shaft end face lubrication function according to claim 4, characterized in that, The inflow channel (132a) is connected to the inner through hole (122).

6. The oil unloading structure for a scroll compressor with shaft end face lubrication function according to claim 1, characterized in that, The inner through hole (122) is an annular groove, and the inner through hole (122) includes an annular groove oil inlet hole (122a), an annular groove oil outlet hole (122c) and an annular groove oil guide channel (122b) connecting the two.

7. The oil unloading structure for a scroll compressor with shaft end face lubrication function according to claim 6, characterized in that, The annular groove oil inlet (122a) is located on the side of the starting direction of rotation of the rotating shaft (5), and the annular groove oil outlet (122c) is located on the side of the ending direction of rotation. The annular groove oil inlet hole (122a) is connected to the auxiliary support oil storage chamber in sequence through the oil inlet channel (131), the outer through hole (121) and the oil guide channel (31), and the annular groove oil outlet hole (122c) is connected to the oil outlet channel (132).

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