Compressor pump body structure and compressor
By designing oil channels and oil conduction grooves on the compressor intermediate plate, continuous lubrication of the slider is achieved, and the problem of sintering jamming caused by insufficient lubrication of the slider is solved, and the performance of the compressor is improved.
Patent Information
- Application Number
- CN202421395661.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-18
AI Technical Summary
Existing compressors are prone to sintering and jamming when the slider is insufficient, resulting in a degradation of compressor performance.
A compressor pump body structure is designed, by opening an oil channel and an oil guide groove on the intermediate plate, the crankshaft is used to drive the lubricating oil into the oil guide groove, and the slider groove is introduced into the cylinder through the oil guide groove, so as to achieve continuous and stable lubrication of the slider.
It effectively prevents the slider from sintering and jamming due to insufficient lubrication, ensures the performance of the compressor and provides a continuous and stable lubrication effect.
Smart Images
Figure CN222650158U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, in particular to a compressor pump body structure and a compressor. Background Art
[0002] The rotary compressor includes a shell and a motor and a pump body arranged in the shell. The pump body includes a crankshaft, a piston and a cylinder. The motor drives the crankshaft and the piston to perform a rotational motion inside the cylinder to periodically compress the refrigerant. A slider is slidingly arranged inside the cylinder. The end of the slider abuts against the piston to separate the inside of the cylinder into a low-temperature and low-pressure area and a high-temperature and high-pressure area, namely, an intake chamber and a compression chamber. When the piston rotates, the volume of the intake chamber and the compression chamber is continuously changed to compress the low-temperature and low-pressure gaseous refrigerant sucked into the intake chamber into a high-temperature and high-pressure gaseous refrigerant in the compression chamber, which is finally discharged for air conditioning refrigeration.
[0003] In the pump body structure, the middle plate separates the upper and lower cylinders. When the piston drives the slider to reciprocate, the end face of the slider rubs against the end face of the middle plate, and the side of the slider rubs against the side of the slider groove of the cylinder. Therefore, the surface of the slider needs to be lubricated with refrigeration oil, otherwise the slider and the cylinder or the middle plate will easily sinter and get stuck. During the normal operation of the compressor, when the oil level is high, the slider is immersed in the oil, the lubrication is good, and the performance of the compressor is normal; when the oil level is lower than the slider, the movement of the slider reduces the oil attached to the slider, and the slider surface is prone to lack of oil, which in turn affects the performance of the compressor. The existing compressor lubrication method for the slider is, on the one hand, relying on the oil dripping, rolling, splashing and other actions outside the pump body under the action of gravity to adhere to the slider, which is uncertain; on the other hand, the slider is replenished with oil in the pump body by returning oil when the pump body inhales air, but it only lubricates the side of the slider close to the crankshaft, which is limited; in this way, since the other surfaces of the slider cannot be lubricated, it is still easy to cause the slider to sinter and get stuck with the cylinder or the middle plate. Utility Model Content
[0004] Based on this, the purpose of the utility model is to overcome the shortcomings of the prior art and provide a compressor pump body structure that can provide continuous and stable lubrication for the slider, effectively preventing the slider from sintering and getting stuck due to insufficient lubrication, thereby ensuring the performance of the compressor.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] A compressor pump body structure, comprising a crankshaft, an intermediate plate and two cylinders separated by the intermediate plate, wherein the intermediate plate is provided with an intermediate hole for the crankshaft to pass through, and the two cylinders are respectively provided with a working chamber for the crankshaft to pass through;
[0007] The two cylinders are each provided with a slider groove connected to their respective working chambers, and a slider can be slidably arranged in each of the slider grooves; the middle plate is provided with an oil channel connected to the middle hole, and the two end surfaces of the middle plate are respectively provided with oil guide grooves, the two oil guide grooves are respectively connected to the oil channel, and the two oil guide grooves are respectively connected to their adjacent slider grooves.
[0008] Therefore, according to the compressor pump body structure of the embodiment of the utility model, an oil channel connected to the middle hole is opened in the middle plate, and oil guide grooves connected to the oil channel are opened on the two end faces of the middle plate, and the two oil guide grooves are respectively connected to the slider grooves on the cylinders adjacent to each other; in this way, when the pump body structure is working, the crankshaft rotates and stirs the lubricating oil to move toward the oil channel of the middle plate, and the lubricating oil partially enters the two oil guide grooves, and finally moves to the slider grooves of the two cylinders to lubricate the slider. Therefore, according to the compressor pump body structure of the embodiment of the utility model, it can provide a continuous and stable lubrication effect for the slider on the cylinder, and can effectively prevent the slider from sintering and getting stuck due to insufficient lubrication, thereby ensuring the performance of the compressor.
[0009] As an implementation mode, the diameter of the working chamber is d, the diameter of the middle plate is D, the shortest distance from the oil guide groove to the axis of the middle hole is L1, d / 2<L1<D / 2. According to the compressor pump body structure of the embodiment of the utility model, the oil guide groove can be prevented from being directly connected to the working chamber of the cylinder, ensuring that the cylinder will not leak. At the same time, the oil guide function of the oil guide groove can be used to allow the lubricating oil to smoothly enter the slider groove of the cylinder after coming out of the oil channel and lubricate the slider.
[0010] As an implementation method, the maximum distance from the oil guide groove to the axis of the middle hole is L2, L1<L2≤D / 2. With such a structural design, the oil guide groove cannot be directly connected to the working chamber of the cylinder, but the oil guide groove can be connected to the outer peripheral side of the middle plate.
[0011] As an implementation manner, the oil channel is radially arranged in the middle plate, and the inner end of the oil channel is connected to the middle hole; branch oil channels are respectively arranged between the oil channel and the two oil guide grooves.
[0012] As an implementation manner, the two branch oil passages are respectively axially arranged in the middle plate.
[0013] As an implementation mode, the outer end of the oil channel penetrates the outer side wall of the middle plate, and the outer end of the oil channel is sealed with an oil plug. According to the compressor pump body structure of the embodiment of the utility model, when designing the oil channel of the middle plate, the oil channel can be formed by drilling a hole radially inward on the outer side wall of the middle plate and penetrating the middle hole; adopting such a structural design not only reduces the difficulty of production and processing, but also facilitates the cleaning of the oil channel. Finally, the outer end of the oil channel located on the outer side wall of the middle plate is sealed by the oil plug to ensure the sealing of the oil channel.
[0014] As an embodiment, the portion of the crankshaft passing through the middle hole is an elliptical cylinder, and the radial cross-section shape of the elliptical cylinder is an ellipse.
[0015] As an implementation manner, the width of the oil guide groove is T1, the width of the sliding block is T2, and 0.3 mm ≤ T1 ≤ T2.
[0016] As an implementation mode, movable rotor pistons are provided in both working chambers, and the rotor pistons are sleeved on the crankshaft.
[0017] The utility model also provides a compressor, including the compressor pump body structure as described above. According to the compressor of the utility model embodiment, by improving the structure of the intermediate plate, it is possible to provide a continuous and stable lubrication effect for the slider on the cylinder, which can effectively prevent the slider from sintering and getting stuck due to insufficient lubrication, thereby ensuring the performance of the compressor.
[0018] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a schematic structural diagram of a compressor pump body structure of an embodiment of the utility model;
[0020] Figure 2 It is a cross-sectional schematic diagram of the compressor pump body structure of an embodiment of the utility model;
[0021] Figure 3 A schematic diagram of the connection between the crankshaft and the cylinder according to an embodiment of the utility model;
[0022] Figure 4 This is an exploded schematic diagram of a crankshaft, an intermediate plate, and a cylinder according to an embodiment of the utility model;
[0023] Figure 5 It is a partial cross-sectional schematic diagram of a cylinder and an intermediate plate of an embodiment of the utility model;
[0024] Figure 6It is a cross-sectional schematic diagram of the middle plate of the embodiment of the utility model.
[0025] Explanation of the reference numerals: 10, crankshaft; 11, rotor piston; 12, elliptical cylinder; 20, intermediate plate; 21, intermediate hole; 22, oil channel; 23, oil guide groove; 24, branch oil channel; 25, oil plug; 30, cylinder; 31, working chamber; 32, slider groove; 33, slider; 40, bearing. DETAILED DESCRIPTION
[0026] To further illustrate each embodiment, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention.
[0027] In the related art, in the pump body structure, the middle plate separates the upper and lower cylinders. When the piston drives the slider to reciprocate, the end face of the slider rubs against the end face of the middle plate, and the side of the slider rubs against the side of the slider groove of the cylinder. Therefore, the surface of the slider needs to be lubricated with refrigeration oil, otherwise the slider and the cylinder or the middle plate will easily sinter and get stuck. During the normal operation of the compressor, when the oil level is at a high level, the slider is immersed in the oil, its lubrication is good, and the performance of the compressor is normal; when the oil level is lower than the slider, the movement of the slider reduces the oil attached to the slider, and the slider surface is prone to lack of oil, which in turn affects the performance of the compressor. The existing compressor lubrication method for the slider is, on the one hand, relying on the oil dripping, rolling, splashing and other actions outside the pump body under the action of gravity to adhere to the slider, which is uncertain; on the other hand, the slider is replenished with oil in the pump body by returning oil when the pump body inhales air, but it only lubricates the side of the slider close to the crankshaft, which is limited; in this way, since the other surfaces of the slider cannot be lubricated, it is still easy to cause the slider to sinter and get stuck with the cylinder or the middle plate.
[0028] In view of this, an embodiment of the utility model provides a compressor pump body structure, which can provide continuous and stable lubrication effect for the slider 33 on the cylinder 30, and can effectively prevent the slider 33 from sintering and getting stuck due to insufficient lubrication, thereby ensuring the performance of the compressor.
[0029] See also Figures 1 to 6The utility model embodiment provides a compressor pump body structure, including a crankshaft 10, an intermediate plate 20 and two cylinders 30 separated by the intermediate plate 20, the intermediate plate 20 is provided with an intermediate hole 21 for the crankshaft 10 to pass through, and the two cylinders 30 are respectively provided with working chambers 31 for the crankshaft 10 to pass through; the two cylinders 30 are both provided with slider grooves 32 connected to their respective working chambers 31, and a slider 33 is slidably arranged in each slider groove 32; the intermediate plate 20 is provided with an oil channel 22 connected to the intermediate hole 21, and the two end surfaces of the intermediate plate 20 are respectively provided with oil guide grooves 23, the two oil guide grooves 23 are respectively connected to the oil channel 22, and the two oil guide grooves 23 are respectively connected to their respective adjacent slider grooves 32.
[0030] Furthermore, the oil passage 22 of the embodiment of the utility model is radially arranged in the middle plate 20, and the inner end of the oil passage 22 is connected to the middle hole 21; branch oil passages 24 are respectively arranged between the oil passage 22 and the two oil guide grooves 23. The two branch oil passages 24 are respectively axially arranged in the middle plate 20.
[0031] Therefore, according to the compressor pump body structure of the embodiment of the utility model, an oil passage 22 connected to the middle hole 21 is opened in the middle plate 20, and oil guide grooves 23 connected to the oil passage 22 are opened on the two end faces of the middle plate 20, and the two oil guide grooves 23 are respectively connected to the slider grooves 32 on the cylinders 30 adjacent to each other; in this way, when the pump body structure is working, the crankshaft 10 runs and stirs the lubricating oil to move toward the oil passage 22 of the middle plate 20, and the lubricating oil partially enters the two oil guide grooves 23, and finally moves to the slider grooves 32 of the two cylinders 30 to lubricate the slider 33. Therefore, according to the compressor pump body structure of the embodiment of the utility model, a continuous and stable lubrication effect can be provided for the slider 33 on the cylinder 30, and the undesirable phenomenon of the slider 33 being sintered and stuck due to insufficient lubrication can be effectively prevented, thereby ensuring the performance of the compressor.
[0032] According to some embodiments of the utility model, the end surfaces of the two cylinders 30 away from the middle plate 20 are respectively connected with bearings 40. In addition, rotor pistons 11 are respectively movably arranged in the working chambers 31 of the two cylinders 30, and the rotor pistons 11 are sleeved on the crankshaft 10. Therefore, when the crankshaft 10 of the embodiment of the utility model is running, the two rotor pistons 11 on the crankshaft 10 can respectively push the two sliders 33 to move.
[0033] According to some embodiments of the utility model, the diameter of the working chamber 31 is d, the diameter of the middle plate 20 is D, the shortest distance from the oil guide groove 23 to the axis of the middle hole 21 is L1, and d / 2<L1<D / 2. It can be understood that in these embodiments, such a structural design can prevent the oil guide groove 23 from being directly connected to the working chamber 31 of the cylinder 30, ensuring that the cylinder 30 will not leak, and at the same time, the oil guide function of the oil guide groove 23 can be used to allow the lubricating oil to smoothly enter the slider groove 32 of the cylinder 30 after coming out of the oil channel 22 and lubricate the slider 33.
[0034] Furthermore, the maximum distance between the oil guide groove 23 and the axis of the middle hole 21 is L2, L1<L2≤D / 2. It can be understood that in these embodiments, such a structural design can prevent the oil guide groove 23 from being directly connected to the working chamber 31 of the cylinder 30, but when L2=D / 2, the oil guide groove 23 can be connected to the outer peripheral side of the middle plate 20.
[0035] According to some embodiments of the utility model, the portion of the crankshaft 10 that passes through the middle hole 21 is an elliptical cylinder 12, and the radial cross-sectional shape of the elliptical cylinder 12 is an elliptical shape. It can be understood that in these embodiments, such a structural design can be adopted so that during the operation of the crankshaft 10, the lubricating oil can be continuously pushed into the oil channel 22 by utilizing the ingenious design of the elliptical cylinder 12, so as to achieve the effect of supplying oil to the slider grooves 32 of the two cylinders 30. However, it should be noted that in other embodiments of the utility model, the radial cross-sectional shape of the portion of the crankshaft 10 that passes through the middle hole 21 can also be other shapes such as a crescent shape, and is not limited to the elliptical shape of the above-mentioned embodiment.
[0036] According to some embodiments of the utility model, the outer end of the oil channel 22 penetrates the outer side wall of the middle plate 20, and the outer end of the oil channel 22 is sealed with an oil plug 25. It can be understood that in these embodiments, such a structural design is adopted, and when processing the oil channel 22 of the middle plate 20, the oil channel 22 can be formed by drilling a hole radially inward on the outer side wall of the middle plate 20 and penetrating the middle hole 21; such a structural design is adopted, which is convenient for reducing the difficulty of production and processing, and is convenient for cleaning the oil channel 22. Finally, the outer end of the oil channel 22 located on the outer side wall of the middle plate 20 is sealed and plugged by the oil plug 25 to ensure the sealing of the oil channel 22. However, it should be noted that in other embodiments of the utility model, the outer end of the oil channel 22 may also not penetrate the outer side wall of the middle plate 20.
[0037] According to some embodiments of the present invention, the width of the oil guide groove 23 is T1, the width of the slider 33 is T2, and 0.3 mm ≤ T1 ≤ T2.
[0038] Reference below Figures 1 to 6A compressor pump body structure according to a specific embodiment of the present invention is described in detail. It should be noted that the specific embodiment described below is only an exemplary description and cannot be understood as a limitation to the present invention.
[0039] The compressor pump body structure of the embodiment of the utility model includes a crankshaft 10, an intermediate plate 20, two cylinders 30, and two bearings 40, wherein the crankshaft 10 is sequentially penetrated and connected to the bearings 40, the cylinders 30, the intermediate plate 20, the cylinders 30, and the bearings 40.
[0040] Specifically, the two cylinders 30 are respectively provided with a working chamber 31, in which a rotor piston 11 is movably arranged, and the rotor piston 11 is sleeved on the crankshaft 10; in addition, the side walls of the working chambers of the two cylinders 30 are respectively radially recessed outward to open a slider groove 32, and a slider 33 is arranged in each slider groove 32. In this way, the crankshaft 10 drives the slider 33 to move in the slider groove 32 by driving the rotor piston 11.
[0041] A middle hole 21 is axially formed in the middle of the middle plate 20, and an oil passage 22 is formed on the side wall of the middle hole 21 and radially penetrates the outer wall of the middle plate 20. The two ends of the oil passage 22 are connected to the middle hole 21 and the outer wall of the middle plate 20, respectively, and the outer end of the oil passage 22 is sealed by an oil plug 25. In addition, two end surfaces of the middle plate 20 are respectively provided with oil guide grooves 23, and the two oil guide grooves 23 are respectively connected to the respective adjacent slider grooves 32, and the two oil guide grooves 23 are respectively connected to the oil passage 22 through axially arranged branch oil passages 24; wherein the width of the oil guide groove 23 is 0.4 mm, and the width of the slider 33 is 0.45 mm. In addition, the radial cross-section of the crankshaft 10 at the middle hole 21 is crescent-shaped.
[0042] The compressor pump body structure according to the embodiment of the utility model can provide a continuous and stable lubrication effect for the slider 33 on the cylinder 30, which can effectively prevent the slider 33 from sintering and getting stuck due to insufficient lubrication, thereby ensuring the performance of the compressor.
[0043] On the other hand, the embodiment of the utility model further provides a compressor, including the compressor pump body structure of any of the above embodiments. According to the compressor of the embodiment of the utility model, by improving the structure of the intermediate plate 20, a continuous and stable lubrication effect can be provided for the slider 33 on the cylinder 30, which can effectively prevent the slider 33 from being sintered and stuck due to insufficient lubrication, thereby ensuring the performance of the compressor.
[0044] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0045] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the pump body structure and compressor range of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.
Claims
1. A compressor pump body structure, characterized in that: It comprises a crankshaft, an intermediate plate and two cylinders separated by the intermediate plate, wherein the intermediate plate is provided with an intermediate hole for the crankshaft to pass through, and the two cylinders are respectively provided with a working chamber for the crankshaft to pass through; The two cylinders are each provided with a slider groove connected to their respective working chambers, and a slider can be slidably arranged in each of the slider grooves; the middle plate is provided with an oil channel connected to the middle hole, and the two end surfaces of the middle plate are respectively provided with oil guide grooves, the two oil guide grooves are respectively connected to the oil channel, and the two oil guide grooves are respectively connected to their adjacent slider grooves.
2. The compressor pump body structure according to claim 1, characterized in that: The diameter of the working chamber is d, the diameter of the middle plate is D, the shortest distance from the oil guide groove to the axis of the middle hole is L1, and d / 2<L1<D / 2.
3. The compressor pump body structure according to claim 2, characterized in that: The maximum distance from the oil guide groove to the axis of the middle hole is L2, and L1<L2≤D / 2.
4. The compressor pump body structure according to claim 1, characterized in that: The oil channel is radially arranged in the middle plate, and the inner end of the oil channel is connected with the middle hole; branch oil channels are respectively arranged between the oil channel and the two oil guide grooves.
5. The compressor pump body structure according to claim 4, characterized in that: The two branch oil passages are respectively axially arranged in the middle plate.
6. The compressor pump body structure according to claim 1, characterized in that: The outer end of the oil passage passes through the outer side wall of the middle plate, and the outer end of the oil passage is sealed with an oil plug.
7. The compressor pump body structure according to claim 1, characterized in that: The portion of the crankshaft that passes through the middle hole is an elliptical cylinder, and the radial cross-section of the elliptical cylinder is an ellipse.
8. The compressor pump body structure according to claim 1, characterized in that: The width of the oil guide groove is T1, the width of the sliding block is T2, and 0.3 mm ≤ T1 ≤ T2.
9. The compressor pump body structure according to claim 1, characterized in that: A movable rotor piston is arranged in each of the two working chambers, and the rotor piston is sleeved on the crankshaft.
10. A compressor, characterized in that: Comprising a compressor pump body structure as described in any one of claims 1 to 9.