An oil supply structure and a compressor

Abstract

This invention provides an oil supply structure and a compressor. The oil supply channel includes a counterweight directly or indirectly mounted on a crankshaft. The crankshaft has a longitudinal channel for pumping lubricating oil. At least one of the counterweight and the crankshaft has or is connected to the oil supply channel. The oil supply channel communicates with the longitudinal channel. The outlet of the oil supply channel is located in a region outside the counterweight area. The outlet of the oil supply channel is configured to directly supply oil to the moving scroll end plate or the thrust surface. By placing the outlet of the oil supply channel in a region outside the counterweight area, this invention allows lubricating oil to be supplied not only through collision with the counterweight but also through the oil supply channel. Furthermore, the oil supply areas provided by the collision with the counterweight and the oil supply through the oil supply channel are different, resulting in a wider lubrication area on the thrust surface and easier entry of lubricating oil into the opening side.

Description

Technical Field

[0001] This utility model relates to an oil supply structure in a compressor, and more particularly to an oil supply structure and a compressor. Background Technology

[0002] Scroll compressors are widely used in refrigeration, air conditioning, and heat pump fields due to their high efficiency, small size, light weight, and stable operation.

[0003] Patent CN119288869A discloses a counterweight block and a scroll compressor. This solution can achieve efficient oil supply to the thrust surface, but it also has the following drawbacks: 1. In patent CN119288869A, an annular groove needs to be machined on the inner ring of the counterweight, and a specially designed closed oil supply channel needs to be set on the balance block, which is not conducive to spatial arrangement and has a high manufacturing cost. 2. Patent CN119288869A states that the lubrication of the push surface relies almost entirely on the lubricating oil entering the upward channel within the counterweight section, while according to the appendix... Figure 1 The simulation results show that the contact between the compressor frame and the moving scroll is not completely tight, and the contact state of the thrust surface varies at different positions. The thrust surface can be divided into the contact side 199 and the open side 198. When the compressor is working, the contact side 199 and the open side 198 will rotate synchronously with the crankshaft. In the CN119288869A scheme, the upward channel in the counterweight is located near the contact side 199. This makes the lubrication effect still poor even if the lubricating oil is sprayed onto the thrust surface through the upward channel.

[0004] In addition, traditional compressors rely on the collision between lubricating oil and counterweight for lubrication, which also has the problem that the lubricating oil splash area is basically fixed, thus limiting the lubrication distribution on the thrust surface. Utility Model Content

[0005] The purpose of this invention is to provide an oil supply structure to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention employs an oil supply structure, including a counterweight directly or indirectly mounted on a crankshaft. The crankshaft has a longitudinal channel for pumping lubricating oil. At least one of the counterweight and the crankshaft has an oil supply channel or is connected to it. The oil supply channel communicates with the longitudinal channel. The outlet of the oil supply channel is located in a region other than the counterweight. The outlet of the oil supply channel is configured to directly supply oil to the moving scroll end plate or the thrust surface.

[0007] Furthermore, the thrust surface includes a contact side and an opening side, and the outlet of the oil supply channel is located on the counterweight and / or the crankshaft near the opening side of the thrust surface.

[0008] Furthermore, the oil supply channel is located inside the crankshaft, one end of the oil supply channel is connected to the longitudinal channel, and the other end of the oil supply channel is configured to face the moving scroll end plate or the thrust surface.

[0009] Furthermore, the oil supply channel is located within the crankshaft and the counterweight. The crankshaft has a longitudinal channel for pumping lubricating oil. Both the crankshaft and the counterweight have flow paths. The longitudinal channel is connected to the flow path of the crankshaft, and the flow path of the crankshaft is connected to the flow path of the counterweight. One end of the flow path of the counterweight is configured to face the moving scroll end plate or the thrust surface. The flow path of the crankshaft and the flow path of the counterweight constitute the oil supply channel.

[0010] Furthermore, the flow paths within the crankshaft and the flow paths within the counterweight are both perforated flow paths.

[0011] Furthermore, the flow path within the counterweight is straight, or the flow path within the counterweight is L-shaped.

[0012] Furthermore, when the flow path within the counterweight is straight, the flow path within the counterweight is inclined.

[0013] Furthermore, the counterweight includes a ring portion, the oil supply channel is disposed within the crankshaft and on the counterweight, the crankshaft is provided with a longitudinal channel for pumping lubricating oil, the crankshaft is provided with a flow path, the longitudinal channel is connected to the flow path, the flow path can transport lubricating oil to the upper surface of the ring portion, the ring portion is provided with an oil guiding slope, the oil guiding slope allows at least a portion of the lubricating oil on the upper surface of the ring portion to be transported to the moving scroll end plate or the thrust surface, the flow path and the oil guiding slope constitute the oil supply channel.

[0014] Furthermore, the upper surface of the ring is provided with blocking surfaces on both sides of the oil guiding slope, and the blocking surfaces and the oil guiding slope are combined to form a guide groove.

[0015] Furthermore, an oil pipe is provided or installed on the crankshaft, and a corresponding mounting hole is opened in the crankshaft to connect the longitudinal channel with the internal cavity of the compressor. The crankshaft is connected to the oil pipe through the mounting hole. One end of the oil pipe is configured to face the moving scroll end plate or the thrust surface. The hollow area inside the oil pipe constitutes the oil supply channel.

[0016] Furthermore, the mounting holes are arranged horizontally or at an angle.

[0017] Furthermore, the mounting holes are arranged at an angle, and the oil pipe is a straight pipe.

[0018] Furthermore, the mounting holes are arranged horizontally, and the oil pipe is a bent pipe.

[0019] Furthermore, the counterweight is provided with or installed with an oil pipe, the crankshaft is provided with a longitudinal channel for pumping lubricating oil, the crankshaft is provided with a flow path, the longitudinal channel is connected to the flow path in the crankshaft, the counterweight is provided with a mounting hole, the flow path in the crankshaft is connected to the mounting hole in the counterweight, the counterweight is connected to the oil pipe through the mounting hole, one end of the oil pipe is configured to face the moving scroll end plate or the thrust surface, and the flow path in the crankshaft and the hollow area in the oil pipe constitute the oil supply channel.

[0020] Furthermore, the mounting hole is a straight hole that penetrates the ring, and the oil pipe is a bent pipe.

[0021] Furthermore, the mounting hole is L-shaped, and the oil pipe is a straight pipe.

[0022] Furthermore, the mounting hole is a tee hole, the oil pipe is a straight pipe, and the end of the oil pipe inserted into the mounting hole is pointed. When the oil pipe is installed in the mounting hole, the oil pipe can block one end of the mounting hole.

[0023] Furthermore, in the connection between the oil pipe and the counterweight or the crankshaft, the oil pipe and the counterweight or the crankshaft are integrated, or the oil pipe and the counterweight or the crankshaft are detachably connected.

[0024] Furthermore, detachable connections include plug-in or threaded connections.

[0025] Furthermore, integration can be achieved through powder metallurgy, welding, powder metallurgy with prefabricated tubes, or interference fit.

[0026] Furthermore, the connection position of the oil supply channel with the counterweight and / or the crankshaft is close to one side of the eccentric shaft on the crankshaft.

[0027] Furthermore, it also includes an annular groove, which is disposed on the crankshaft and / or the counterweight, and the annular groove is connected to the longitudinal channel and the oil supply channel.

[0028] Furthermore, the inner diameter of the oil supply channel is 1~6mm.

[0029] Furthermore, the inner diameter of the oil supply channel is 2~4mm.

[0030] This utility model also provides a compressor that includes the above-described oil supply structure.

[0031] In summary, the beneficial effects of this utility model are as follows: By setting the outlet of the oil supply channel in the non-counterweight area, the lubricating oil can be supplied not only through collision with the counterweight but also through the oil supply channel. Furthermore, the oil supply areas provided by the collision with the counterweight and the oil supply channel are different, resulting in a wider lubrication area on the thrust surface and easier entry of lubricating oil into the opening side. Compared to the assembled upward channel structure disclosed in patent CN119288869A, this utility model, by setting the oil supply channel on one side of the eccentric shaft, achieves efficient upward oil supply without the need for an annular channel. The technical solution of this utility model only requires opening through holes in the crankshaft and counterweight respectively and installing oil pipes on the existing structure to achieve the above functions. The structure is simplified, processing is convenient, and manufacturing costs are lower. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model, 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 one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is an exploded view of the main components at the thrust surface of the compressor; Figure 2 This is a simulation diagram of the contact condition of the thrust surface; Figure 3 This is a schematic diagram and a partial enlarged view of the oil supply structure of a traditional compressor; Figure 4 It is a method of setting up oil passages inside the crankshaft; Figure 5 It is a method of setting up oil passages inside the crankshaft; Figure 6 It is a method of incorporating an oil circuit within a counterweight; Figure 7 It is a method of incorporating an oil circuit within a counterweight; Figure 8 It is a method of setting up the oil supply channel by combining the crankshaft and counterweight; Figure 9 This is a method of mounting oil pipes on a crankshaft; Figure 10 This is a method of mounting oil pipes on a crankshaft; Figure 11 This is a method of installing oil pipes with counterweights; Figure 12 yes Figure 11 A sectional view; Figure 13 This is a method of installing oil pipes with counterweights; Figure 14 yes Figure 13 A sectional view; Figure 15 This is a method of installing oil pipes with counterweights; Figure 16 yes Figure 15 A sectional view; Figure 17 It refers to threaded oil pipes and unthreaded oil pipes; Figure 18 It is a method of mounting counterweights and oil pipes on the crankshaft; Figure 19 yes Figure 18 Simulation diagram of the oil circuit in the technical solution; Figure 20 This is a schematic diagram of an inclined oil pipe installed on a counterweight; Figure 21 This is a schematic diagram of a crankshaft with an annular groove and a counterweight assembly. Detailed Implementation

[0034] To make the technical problem to be solved by this utility model, the technical solution and the beneficial effects clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings. It should be noted that the embodiments are only a detailed description of this utility model and should not be regarded as a limitation of this utility model. All features disclosed in the embodiments of this utility model, or all steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way.

[0035] To help those skilled in the art better understand the technical improvements of this utility model, the oil supply structure of a conventional compressor is briefly described first: The oil supply structure includes a crankshaft 10 and a counterweight 20. The counterweight 20 includes a counterweight portion 30 and a ring portion 21. The crankshaft 10 has an eccentric shaft 11. One function of the counterweight portion 30 is to balance the inertial force generated when the eccentric shaft 11 rotates. Therefore, the counterweight portion 30 is usually located on the side of the crankshaft 10 opposite (away from) the eccentric shaft 11. When the compressor starts, lubricating oil is pumped from the longitudinal channel 80 of the crankshaft 10. The pumped lubricating oil falls through the first gap 96 between the eccentric shaft 11 and the moving scroll hub 98 onto the upper surface of the ring portion 21 of the counterweight 20. The upper surface of the ring portion 21 of the counterweight 20 receives the lubricating oil and then collides with the rotating counterweight 20, thereby splashing onto the moving scroll end plate or the thrust surface. The lubricating oil needs to enter the upper surface of the ring 21 of the counterweight 20 through the longitudinal channel 80 and the first gap 96 in sequence, and then collide with the counterweight 20 to complete the splashing. This oil supply method is slow and has a small amount of oil, which will increase the risk of wear on the thrust surface.

[0036] Example 1.

[0037] To address the technical problem of poor lubrication in the prior art, this embodiment provides an oil supply structure, including a counterweight 20 directly or indirectly mounted on a crankshaft 10. The crankshaft 10 has a longitudinal channel 80 for pumping lubricating oil. At least one of the counterweight 20 and the crankshaft 10 has or is connected to an oil supply channel, which communicates with the longitudinal channel 80. The outlet of the oil supply channel is located in a non-counterweight area, which refers to areas other than the counterweight. The oil supply channel is configured to directly supply oil to the moving scroll end plate or the thrust surface. Direct oil supply means that the oil ejected from the outlet of the oil supply channel can directly enter the moving scroll end plate or the thrust surface; this method has the highest oil supply efficiency. By setting the outlet of the oil supply channel in the non-counterweight area, the lubricating oil can be supplied not only through collision with the counterweight 30, but also through the oil supply channel. The oil supply areas provided by the collision with the counterweight 30 and the oil supply through the oil supply channel are different, which makes the lubrication area of ​​the thrust surface wider and the lubricating oil easier to enter the opening side 198.

[0038] Preferably, to allow more lubricating oil to enter the open side 198, the outlet of the oil supply channel is located in the region of the thrust surface open side 198. In this case, by controlling the flow rate (orifice diameter) of the oil supply channel, all lubricating oil except for the lubricating oil in the region lubricating the moving scroll hub is supplied to the moving scroll end plate or the thrust surface through the oil supply channel. With this structure, the lubricating oil no longer needs to flow through the moving scroll hub, but is directly supplied to the scroll end plate or the thrust surface through the oil supply channel, achieving a very short oil supply time. Simultaneously, without passing through the bearing temperature rise, the oil temperature is lower, resulting in better lubrication. Furthermore, the precise oil supply from the oil supply channel outlet directly to the open side 198 facilitates the formation of an oil wedge, thereby generating a hydrodynamic lubrication effect and further improving lubrication. Regarding how to achieve the oil supply channel outlet being located in the region of the thrust surface open side 198, this can be achieved by performing simulation calculations on the compressor thrust surface contact after the basic design of the counterweight is completed. Figure 2 The simulation data of the thrust surface contact in the middle is used to set the outlet position of the oil supply channel according to the position of the opening side 198 relative to the crankshaft and the counterweight.

[0039] It is important to note that determining the outlet position of the oil supply channel does not necessarily mean that the connection position between the oil supply channel and the counterweight 20 and / or crankshaft 10 is determined, or that the position where the oil supply channel is located on the counterweight 20 and / or crankshaft 10 is determined. This is because the oil supply channel is not necessarily installed vertically; it may also be installed at an angle (e.g., as shown in the attached image). Figure 20 (As shown), or the oil supply passage itself is curved. Therefore, there is no relationship between the outlet position of the oil supply passage and its connection position on the counterweight 20 and / or crankshaft 10, or the setting position of the oil supply passage on the counterweight 20 and / or crankshaft 10.

[0040] Regarding the design of the oil supply channel, this utility model application provides several methods: Method 1: The oil supply channel is located inside the crankshaft, which has a longitudinal channel for pumping lubricating oil. One end of the oil supply channel is connected to the longitudinal channel, and the other end is configured to face the moving scroll end plate or the thrust surface. For details, please refer to the appendix. Figure 4 The crankshaft 10 has a longitudinal channel 80 and an oil supply channel 106. One end of the oil supply channel 106 is connected to the longitudinal channel 80, and the other end of the oil supply channel 106 is configured to face the moving scroll end plate or the thrust surface. When oil enters the longitudinal channel 80, some lubricating oil will enter the oil supply channel 106 and be directly sprayed onto the moving scroll end plate or the thrust surface.

[0041] Method 2: The oil supply channel is located inside the crankshaft and counterweight. The crankshaft has a longitudinal channel for pumping lubricating oil. Both the crankshaft and the counterweight have flow paths. The longitudinal channel is connected to the flow path of the crankshaft, and the flow path of the crankshaft is connected to the flow path of the counterweight. One end of the flow path of the counterweight is configured to face the moving scroll end plate or the thrust surface. The flow path of the crankshaft and the flow path of the counterweight constitute the oil supply channel.

[0042] In one specific implementation, refer to the appendix. Figure 5 The crankshaft 10 has a first flow path 107, which is connected to the longitudinal channel 80, as shown in the attached figure. Figure 6 The counterweight 20 has a second flow path 108 within its ring portion 21. One end of the second flow path 108 is configured to face the moving scroll end plate or the thrust surface. When the crankshaft 10 is assembled with the counterweight 20, the first flow path 107 and the second flow path 108 are connected. When oil enters through the longitudinal channel 80, some lubricating oil enters the first flow path 107 and flows into the second flow path 108, ultimately being directly sprayed onto the moving scroll end plate or the thrust surface. The first flow path 107 within the crankshaft 10 and the second flow path 108 within the counterweight 20 constitute an oil supply channel. In this embodiment, both the first flow path 107 and the second flow path 108 are perforated flow paths.

[0043] Preferred options are shown in the appendix. Figure 6 The second flow path 108 is straight. Furthermore, the second flow path 108 is inclined.

[0044] Preferred options are shown in the appendix. Figure 7 The second flow path 108 is L-shaped. Regarding how to form the L-shaped second flow path 108, a vertical blind hole and a horizontal blind hole can be machined in the counterweight 20 first, and the two blind holes can be connected at the same time; or, a vertical blind hole and a horizontal through hole can be machined in the counterweight 20 first, and the blind hole and the through hole can be connected at the same time, and the end of the through hole located on the outer surface of the ring 21 can be blocked with a threaded plug 109.

[0045] Method 3: The oil supply channel is located inside the crankshaft and on the counterweight. The crankshaft has a longitudinal channel for pumping lubricating oil and a flow path. The longitudinal channel is connected to the flow path of the crankshaft. The flow path can transport the lubricating oil to the upper surface of the ring. The ring of the counterweight has an oil guide slope. The oil guide slope allows at least part of the lubricating oil on the upper surface of the ring to be transported to the moving scroll end plate or the thrust surface. The flow path of the crankshaft and the oil guide slope on the counterweight constitute the oil supply channel.

[0046] In one specific embodiment, the crankshaft 10 is provided with a first flow path 107, one end of which is connected to the longitudinal channel 80, as shown in the attached figure. Figure 8 The ring portion 21 of the counterweight 20 is provided with an oil guiding slope 130. The oil guiding slope 130 allows the lubricating oil on the upper surface of the ring portion 21 to be guided to the moving scroll end plate or the thrust surface. When the crankshaft 10 is assembled with the counterweight 20, it must be ensured that the first flow path 107 is not blocked by the ring portion 21 so that the oil flowing out of the first flow path 107 can enter the upper surface of the ring portion 21. When oil enters through the longitudinal channel 80, the lubricating oil will enter the first flow path 107 and flow to the upper surface of the ring portion 21. At least part of the lubricating oil is guided by the oil guiding slope 130 to the moving scroll end plate or the thrust surface. The first flow path 107 in the crankshaft 10 and the oil guiding slope on the counterweight 20 constitute an oil supply channel.

[0047] Preferably, the upper surface of the ring portion 21 is further provided with blocking surfaces 114 on both sides of the oil guiding slope. The blocking surfaces 114 and the oil guiding slope 130 combine to form a guide groove. The guide groove helps to guide as much lubricating oil as possible from the upper surface of the ring portion 21 to the moving scroll end plate or the thrust surface. Furthermore, the blocking surfaces 114 extend to the position of the first flow path 107.

[0048] In this embodiment, the first flow path 107 is a perforated flow path.

[0049] Method 4: An oil pipe is provided or installed on the crankshaft. A corresponding mounting hole is provided inside the crankshaft, connecting the longitudinal channel to the internal cavity of the compressor. The crankshaft connects to the oil pipe through the mounting hole. One end of the oil pipe is configured to face the moving scroll end plate or thrust surface. The hollow area inside the oil pipe forms the oil supply channel. For details, please refer to the appendix. Figure 9 The crankshaft 10 has a corresponding first mounting hole 111 that connects the longitudinal channel 80 to the internal cavity of the compressor. The crankshaft 10 is connected to the oil pipe 110 through the first mounting hole 111. One end of the oil pipe 110 is configured to face the moving scroll end plate or the thrust surface. The hollow area inside the oil pipe 110 forms an oil supply channel. When oil enters the longitudinal channel 80, some lubricating oil will be sprayed onto the moving scroll end plate or the thrust surface through the oil pipe 110.

[0050] Preferably, the first mounting hole 111 can be arranged horizontally or at an angle. In one specific embodiment, refer to the attached drawing. Figure 9 The first mounting hole 111 is arranged at an angle, and the oil pipe 110 is a straight pipe. In another specific embodiment, refer to the attached... Figure 10 The first mounting hole 111 is horizontally arranged, and the oil pipe 110 is a bend, such as an L-shaped pipe. The L-shaped oil pipe can be obtained by bending or other processing methods. The bend can be pre-bent or bent after installation.

[0051] Method 5: The counterweight has an oil pipe or is mounted thereon. The crankshaft has a longitudinal channel for pumping lubricating oil, and a flow path is provided within the crankshaft. The longitudinal channel communicates with the flow path within the crankshaft. The counterweight has a mounting hole, and the flow path within the crankshaft communicates with the mounting hole within the counterweight. The counterweight is connected to the oil pipe through the mounting hole. One end of the oil pipe is configured to face the moving scroll end plate or the thrust surface. The flow path within the crankshaft and the hollow area within the oil pipe constitute the oil supply channel. For details, please refer to the appendix. Figure 5 The crankshaft 10 has a first flow path 107, which is connected to the longitudinal channel 80, as shown in the attached figure. Figure 11 The counterweight 20 has a second mounting hole 112 in its ring 21. When the crankshaft 10 is assembled with the counterweight 20, the first flow path 107 is connected to the second mounting hole 112. The second mounting hole 112 is used to install an oil pipe 110. One end of the oil pipe 110 is configured to face the moving scroll end plate or the thrust surface. The first flow path 107 in the crankshaft 10 and the hollow area in the oil pipe constitute an oil supply channel. When oil enters the longitudinal channel 80, some lubricating oil will enter the first flow path 107 and finally be sprayed onto the moving scroll end plate or the thrust surface through the oil pipe 110. In mode four, the first flow path 107 is a perforated flow path.

[0052] In one specific implementation, refer to the appendix. Figure 11 , 12 The second mounting hole 112 is a straight hole that passes through the ring 21, and the oil pipe 110 is a bent pipe, such as an L-shape.

[0053] In one specific implementation, refer to the appendix. Figure 13 , 14 The second mounting hole 112 is L-shaped, and the oil pipe 110 is a straight pipe. Regarding how to form the L-shaped second mounting hole 112, one can first process a vertical blind hole and a horizontal blind hole inside the counterweight 20, and connect the two blind holes; or, one can first process a vertical blind hole and a horizontal through hole inside the counterweight 20, and connect the blind hole and the through hole, and then plug the end of the through hole located on the outer surface of the ring 21 with a plug 109.

[0054] In one specific implementation, refer to the appendix. Figure 15 , 16The second mounting hole 112 is a tee hole, and the oil pipe 110 is a straight pipe. One end of the oil pipe 110 inserted into the second mounting hole 112 is pointed, so that when the oil pipe 110 is installed in the second mounting hole 112, the oil pipe 110 can completely block one end of the second mounting hole 112. (See attached diagram.) Figure 16 As shown.

[0055] Other methods: Any combination of methods one through five. Due to the large number of possible combinations, this utility model does not list them all.

[0056] Preferably, in the connection between the oil pipe 110 and the counterweight 20 or crankshaft 10 in methods four and five, the oil pipe 110 and the counterweight 20 or crankshaft 10 are integrated, or the oil pipe 110 and the counterweight 20 or crankshaft 10 are detachably connected. Detachable connections include plug-in connections, threaded connections, or other conventional connection methods, as shown in the attached diagram. Figure 17 As shown. Integration can be achieved through powder metallurgy, welding, powder metallurgy + prefabricated tube, or interference fit.

[0057] To ensure faster and more comprehensive supply of lubricating oil to the moving scroll end plate or thrust surface, the oil supply channel is preferably positioned close to the side of the eccentric shaft 11 on the crankshaft, such as in the attached... Figure 18 In this design, the crankshaft 10's rotation center is the rotation axis A, and the oil supply channel, formed by the first flow path 107 and the hollow area inside the oil pipe 110, is located on the side of the counterweight 20 near the eccentric shaft 11. This technical solution offers two advantages: 1. Compared to the oil supply channel located on the side of the counterweight 30, the oil supply channel closer to the eccentric shaft 11 is farther from the rotating shaft A. Therefore, the oil supply channel located on the side of the eccentric shaft 11 can provide greater centrifugal force to the lubricating oil in the channel, making it easier for the lubricating oil to be sprayed onto the moving volute end plate or the thrust surface. (See attached diagram) Figure 19 , for the attached Figure 18The proposed solution was simulated, and the simulation results showed that the oil pipe could directly spray oil onto the thrust surface. Simultaneously, the applicant also conducted a physical simulation test: without installing the moving scroll plate, an oil plug was used to seal the top of the longitudinal channel (this seal completely simulates the characteristics and flow channels of the moving scroll hub during actual compressor operation and will not affect the experimental results), simulating the moving scroll hub 98. A layer of plastic wrap was added above the crankshaft counterweight to directly observe the oil supply to the thrust surface. In the physical simulation test, lubricating oil appeared on the plastic wrap 1 second after the compressor started, indicating that the oil pipe 110 could directly spray lubricating oil onto the moving scroll end plate / thrust surface of the compressor. Compared to the assembled upward channel structure shown in Embodiment 3 of Patent CN119288869A, which still relies on an annular channel for oil pressure boosting, this utility model achieves efficient upward oil supply without the need for an annular channel by setting the oil supply channel on one side of the eccentric shaft 11, and also has lower manufacturing costs. For example, see attached... Figure 18 The proposed solution only requires opening through holes in the crankshaft and counterweight respectively, and installing oil pipe 110 on the existing structure to achieve the above functions, which simplifies the structure and facilitates processing.

[0058] 2. The oil supply channel near the eccentric shaft 11 helps to supplement the oil supply area of ​​the thrust surface. In the prior art, thrust surface lubrication is only achieved by oil being thrown out by the counterweight 30, resulting in a limited lubrication area. However, in the solution of this utility model application, an oil supply channel is provided on one side of the eccentric shaft 11, which is located on the opposite side of the counterweight 30. In this case, the oil supply channel can supply oil to areas that were previously unable to be lubricated, making the lubrication area complete. This solution is applicable to all compressors. Even without simulation of thrust surface contact, the complete lubrication area of ​​the compressor ensures sufficient lubrication on the open side 198.

[0059] Although the technical solution of this utility model allows technicians to directly supply oil to the moving vortex or thrust surface without setting an annular groove, in some cases, technicians still want to increase the oil pressure of the oil supply channel. Preferably, the oil supply structure also includes an annular groove, which is provided on the counterweight and / or crankshaft, and is constructed to communicate with the longitudinal channel and the oil supply channel. In some embodiments, the annular groove 81 is provided on the crankshaft 10, and when the crankshaft and counterweight are assembled, a closed annular groove is formed, which communicates with the longitudinal channel and the oil supply channel.

[0060] The technicians of this invention tested oil supply channels with different inner diameters and found that the inner diameter of the oil supply channel is preferably 1~6mm, and more preferably 2~4mm.

[0061] Example 2.

[0062] This embodiment provides a compressor having any of the oil supply channels described in Embodiment 1.

[0063] The other implementation methods in this embodiment are the same as in Embodiment 1.

[0064] The above are merely specific embodiments of the utility model, but the scope of protection of the utility model is not limited thereto. Any changes or substitutions conceived without creative effort should be included within the scope of protection of the utility model. Therefore, the scope of protection of the utility model should be determined by the scope of protection defined in the claims.

[0065] The invention shown and described herein can be implemented in the absence of any elements or limitations specifically disclosed herein. The terminology and expressions used are intended to be descriptive and not limiting, and it is not intended that any equivalents of the features shown and described herein or any parts thereof be excluded in the use of such terminology and expressions. It should be recognized that various modifications are possible within the scope of this invention. Therefore, it should be understood that although the invention has been specifically disclosed by way of various embodiments and optional features, modifications and variations of the concepts herein can be adopted by those skilled in the art, and such modifications and variations are considered to fall within the scope of the invention as defined in the appended claims.

[0066] The contents of any articles, patents, patent applications, and all other documents and information available electronically herein are incorporated herein by reference in their entirety, as if each individual publication were specifically and individually cited for reference. The applicant reserves the right to incorporate any and all material and information from any such articles, patents, patent applications, or other documents into this application.

Claims

1. An oil supply structure, characterized in that, The device includes a counterweight that is directly or indirectly mounted on the crankshaft. The crankshaft has a longitudinal channel for pumping lubricating oil. At least one of the counterweight and the crankshaft has an oil supply channel or is connected to it. The oil supply channel communicates with the longitudinal channel. The outlet of the oil supply channel is located in a region other than the counterweight. The outlet of the oil supply channel is configured to directly supply oil to the moving scroll end plate or the thrust surface.

2. The oil supply structure according to claim 1, characterized in that, The thrust surface includes a contact side and an opening side, and the outlet of the oil supply channel is located on the counterweight and / or the crankshaft near the opening side of the thrust surface.

3. The oil supply structure according to claim 1, characterized in that, The oil supply channel is located inside the crankshaft. One end of the oil supply channel is connected to the longitudinal channel, and the other end of the oil supply channel is configured to face the moving scroll end plate or the thrust surface.

4. The oil supply structure according to claim 1, characterized in that, The oil supply channel is located within the crankshaft and the counterweight. The crankshaft has a longitudinal channel for pumping lubricating oil. Both the crankshaft and the counterweight have flow paths. The longitudinal channel is connected to the flow path of the crankshaft, and the flow path of the crankshaft is connected to the flow path of the counterweight. One end of the flow path of the counterweight is configured to face the moving scroll end plate or the thrust surface. The flow paths of the crankshaft and the flow paths of the counterweight constitute the oil supply channel.

5. The oil supply structure according to claim 4, characterized in that, The flow paths within the crankshaft and the flow paths within the counterweight are both perforated flow paths.

6. The oil supply structure according to claim 4, characterized in that, The flow path within the counterweight is either straight or L-shaped.

7. The oil supply structure according to claim 6, characterized in that, When the flow path within the counterweight is straight, the flow path within the counterweight is inclined.

8. The oil supply structure according to claim 1, characterized in that, The counterweight includes a ring portion, the oil supply channel is located inside the crankshaft and on the counterweight, the crankshaft is provided with a longitudinal channel for pumping lubricating oil, the crankshaft is provided with a flow path, the longitudinal channel is connected to the flow path, the flow path can transport lubricating oil to the upper surface of the ring portion, the ring portion is provided with an oil guiding slope, the oil guiding slope allows at least a portion of the lubricating oil on the upper surface of the ring portion to be transported to the moving scroll end plate or the thrust surface, the flow path and the oil guiding slope constitute the oil supply channel.

9. The oil supply structure according to claim 8, characterized in that, The upper surface of the ring is also provided with blocking surfaces on both sides of the oil guiding slope, and the blocking surfaces and the oil guiding slope are combined to form a guide groove.

10. The oil supply structure according to claim 1, characterized in that, The crankshaft is provided with or installed with an oil pipe, and the crankshaft is provided with a corresponding mounting hole that connects the longitudinal channel and the internal cavity of the compressor. The crankshaft is connected to the oil pipe through the mounting hole. One end of the oil pipe is configured to face the moving scroll end plate or the thrust surface. The hollow area inside the oil pipe constitutes the oil supply channel.

11. The oil supply structure according to claim 10, characterized in that, The mounting holes are arranged horizontally or at an angle.

12. The oil supply structure according to claim 11, characterized in that, The mounting holes are arranged at an angle, and the oil pipe is a straight pipe.

13. The oil supply structure according to claim 11, characterized in that, The mounting holes are arranged horizontally, and the oil pipe is a bend.

14. The oil supply structure according to claim 1, characterized in that, The counterweight is provided with or installed with an oil pipe. The crankshaft has a longitudinal channel for pumping lubricating oil. The crankshaft has a flow path. The longitudinal channel is connected to the flow path in the crankshaft. The counterweight has a mounting hole. The flow path in the crankshaft is connected to the mounting hole in the counterweight. The counterweight is connected to the oil pipe through the mounting hole. One end of the oil pipe is configured to face the moving scroll end plate or the thrust surface. The flow path in the crankshaft and the hollow area in the oil pipe constitute the oil supply channel.

15. The oil supply structure according to claim 14, characterized in that, The mounting hole is a straight hole that passes through the ring, and the oil pipe is a bent pipe.

16. The oil supply structure according to claim 14, characterized in that, The mounting hole is L-shaped, and the oil pipe is a straight pipe.

17. The oil supply structure according to claim 14, characterized in that, The mounting hole is a tee hole, the oil pipe is a straight pipe, and the end of the oil pipe inserted into the mounting hole is pointed. When the oil pipe is installed in the mounting hole, the oil pipe can block one end of the mounting hole.

18. An oil supply structure according to any one of claims 10 to 17, characterized in that, In the connection between the oil pipe and the counterweight or the crankshaft, the oil pipe and the counterweight or the crankshaft are integrated, or the oil pipe and the counterweight or the crankshaft are detachably connected.

19. The oil supply structure according to claim 18, characterized in that, Detachable connections include plug-in or threaded connections.

20. The oil supply structure according to claim 18, characterized in that, Integration can be achieved through powder metallurgy, welding, powder metallurgy with prefabricated tubes, or interference fit.

21. The oil supply structure according to claim 1, characterized in that, The oil supply channel is connected to the counterweight and / or the crankshaft at a position close to one side of the eccentric shaft on the crankshaft.

22. The oil supply structure according to claim 1, characterized in that, It also includes an annular groove, which is disposed on the crankshaft and / or the counterweight, and the annular groove is connected to the longitudinal channel and the oil supply channel.

23. The oil supply structure according to claim 1, characterized in that, The inner diameter of the oil supply channel is 1~6mm.

24. The oil supply structure according to claim 1, characterized in that, The inner diameter of the oil supply channel is 2~4mm.

25. A compressor, characterized in that, The oil supply structure includes any one of claims 1 to 24.

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