Crankshaft, compressor and heating and ventilation device

Abstract

The utility model relates to a kind of crankshaft, compressor and heating and ventilation equipment, crankshaft includes long shaft, eccentric shaft, short shaft connected in turn axially, the inside of long shaft is opened in axial direction and is passed through and is equipped with oil supply passage, the inside of eccentric shaft is opened in axial direction and is passed through and is equipped with the first oil suction passage of intercommunication oil supply passage, the inside of short shaft is opened in axial direction and is passed through and is equipped with the second oil suction passage of intercommunication first oil suction passage;The line of two points of the maximum and minimum eccentricity of eccentric shaft is as demarcation line, the section of crankshaft with demarcation line along axial direction is divided into high-pressure area and low-pressure area, the axis of first oil suction passage and / or the axis of second oil suction passage is offset to low-pressure area.The utility model's crankshaft, the rigidity and supportability of crankshaft in high-pressure area can be effectively enhanced, and then the reliability and durability of crankshaft are promoted.

Description

Technical Field

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

[0002] During the operation of the compressor, when the refrigerant is compressed to a high-pressure state, the resulting high pressure exerts a large force on the cylinder wall, piston, and rotating parts. Some of these forces are transmitted to the crankshaft through the piston, causing the crankshaft to bear additional bending and torsional stresses. This leads to problems such as fatigue damage caused by stress concentration, insufficient lubrication caused by traditional oil suction channels, and increased wear, thereby reducing the reliability and durability of the crankshaft. Utility Model Content

[0003] Based on this, the purpose of this utility model is to overcome the shortcomings of the prior art and provide a crankshaft, compressor and HVAC equipment that can effectively enhance the rigidity and support of the crankshaft in the high pressure area, thereby improving the reliability and durability of the crankshaft.

[0004] To achieve the above objectives, the first aspect of this utility model provides a crankshaft, comprising a long shaft, an eccentric shaft, and a short shaft connected axially in sequence. An oil supply channel is formed through the interior of the long shaft along the axial direction. A first oil suction channel communicating with the oil supply channel is formed through the interior of the eccentric shaft along the axial direction. A second oil suction channel communicating with the first oil suction channel is formed through the interior of the short shaft along the axial direction. The line connecting the two points of maximum and minimum eccentricity of the eccentric shaft serves as a dividing line. The crankshaft is divided into a high-pressure zone and a low-pressure zone along the axial direction using the dividing line as a cross-section. The axis of the first oil suction channel and / or the axis of the second oil suction channel are offset towards the low-pressure zone.

[0005] Therefore, according to the crankshaft of this utility model, an oil supply channel, a first oil suction channel, and a second oil suction channel are sequentially arranged along the axial direction. Using the line connecting the two points of maximum and minimum eccentricity of the eccentric shaft as the dividing line, the axial section of the crankshaft along the dividing line is divided into a high-pressure zone and a low-pressure zone. The high-pressure zone is the side to which the crankshaft rotates during operation. In this way, by shifting the first oil suction channel on the eccentric shaft and / or the second oil suction channel on the short shaft toward the low-pressure zone, that is, by setting a single section of the oil suction channel to be shifted toward the low-pressure zone, or by shifting multiple sections of the oil suction channel toward the low-pressure zone, the hollowed-out area of ​​the crankshaft in the high-pressure zone is relatively smaller than that in the low-pressure zone. This effectively increases the rigidity and support capacity of the high-pressure zone of the crankshaft, significantly improves the reliability and durability of the crankshaft, and effectively improves the performance and reliability of the compressor.

[0006] In one embodiment, the axis of the first oil suction channel is offset toward the low-pressure area, and the distance between the axis of the first oil suction channel and the dividing line is L1, where 0.2mm≤L1≤5mm.

[0007] In one embodiment, the axis of the second oil suction channel is offset toward the low-pressure zone, and the distance between the axis of the second oil suction channel and the dividing line is L2, where 0.2mm≤L2≤5mm.

[0008] In one embodiment, the axes of the first oil suction channel and the second oil suction channel are offset toward the low-pressure zone, the distance between the axis of the first oil suction channel and the dividing line is L3, 0.2mm≤L3≤5mm, and the distance between the axis of the second oil suction channel and the dividing line is L4, 0.2mm≤L4≤5mm.

[0009] In one embodiment, the first oil suction channel and the second oil suction channel are coaxially arranged, and the inner diameter of the first oil suction channel is equal to the inner diameter of the second oil suction channel.

[0010] In one implementation, the axis of the oil supply channel passes through the dividing line, or the axis of the oil supply channel is offset toward the low-pressure area.

[0011] In one embodiment, an oil reservoir is recessed on the outer side wall of the eccentric shaft.

[0012] In one embodiment, an oil suction hole is provided on the outer side wall of the short shaft, and the oil suction hole is connected to the second oil suction channel.

[0013] A second aspect of this invention provides a compressor comprising the crankshaft described in any of the preceding claims. The compressor according to this invention can effectively enhance the rigidity and support of the crankshaft in the high-pressure region, thereby improving the reliability and durability of the crankshaft.

[0014] A third aspect of this utility model provides a heating, ventilation, and air conditioning (HVAC) device comprising the compressor described in any of the preceding claims. The HVAC device according to this utility model can effectively enhance the rigidity and support of the crankshaft in high-pressure areas, thereby improving the reliability and durability of the crankshaft.

[0015] To better understand and implement this invention, the following detailed description is provided in conjunction with the accompanying drawings. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of the crankshaft according to an embodiment of the present utility model;

[0017] Figure 2 This is a second schematic diagram of the crankshaft structure according to an embodiment of the present utility model;

[0018] Figure 3 This is the third schematic diagram of the crankshaft structure according to an embodiment of the present utility model;

[0019] Figure 4 This is the fourth schematic diagram of the crankshaft structure according to an embodiment of the present utility model;

[0020] Figure 5 for Figure 4 The diagram shows a cross-sectional view along direction AA.

[0021] Explanation of reference numerals in the attached drawings: 10, long shaft; 11, oil supply channel; 20, eccentric shaft; 21, first oil suction channel; 22, oil reservoir; 30, short shaft; 31, second oil suction channel; 32, oil suction hole. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this application clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] The terminology used in this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms “a,” “the,” and “the” used in this invention and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0024] In the following description, when referring to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims. In the description of this application, it should be understood that the terms "first," "second," "third," etc., are used only to distinguish similar objects and are not necessarily used to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] In related technologies, during the operation of a compressor, when the refrigerant is compressed to a high-pressure state, the resulting high pressure exerts a large force on the cylinder wall, piston, and rotating components. Some of these forces are transmitted to the crankshaft through the piston, causing the crankshaft to bear additional bending and torsional stresses. This leads to problems such as fatigue damage caused by stress concentration, insufficient lubrication caused by traditional oil suction channels, and increased wear, thereby reducing the reliability and durability of the crankshaft.

[0026] Therefore, this utility model provides a crankshaft, a compressor, and a heating and ventilation system. The crankshaft, compressor, and heating and ventilation system according to this utility model can effectively enhance the rigidity and support of the crankshaft in high-pressure areas, thereby improving the reliability and durability of the crankshaft.

[0027] Please see Figures 1 to 5 The first aspect of this utility model provides a crankshaft, including a long shaft 10, an eccentric shaft 20, and a short shaft 30 connected axially in sequence. The long shaft 10 has an oil supply channel 11 extending through it in the axial direction. The eccentric shaft 20 has a first oil suction channel 21 extending through it in the axial direction, which communicates with the oil supply channel 11. The short shaft 30 has a second oil suction channel 31 extending through it in the axial direction, which communicates with the first oil suction channel 21. The line connecting the two points of maximum and minimum eccentricity of the eccentric shaft 20 serves as a dividing line. The crankshaft is divided into a high-pressure zone and a low-pressure zone along the axial direction using the dividing line as the dividing line. The axis of the first oil suction channel 21 and / or the axis of the second oil suction channel 31 are offset towards the low-pressure zone.

[0028] Specifically, the axis of the oil supply channel 11 may pass through the dividing line, or the axis of the oil supply channel 11 may be offset towards the low-pressure area. This can be understood as follows: because the long axis 10 is subjected to less force, the axis of the oil supply channel 11 may pass through the dividing line, i.e., it may not be offset towards the low-pressure area; or the axis of the oil supply channel 11 may be offset towards the low-pressure area, and the amount of offset can be set according to actual needs.

[0029] Therefore, according to the present invention, the crankshaft is provided with interconnected oil supply channels 11, first oil suction channels 21, and second oil suction channels 31 in sequence along the axial direction. Using the line connecting the two points of maximum and minimum eccentricity of the eccentric shaft 20 as the dividing line, the axial section of the crankshaft along the dividing line is divided into a high-pressure zone and a low-pressure zone. The high-pressure zone is the side to which the crankshaft rotates when it is running. In this way, by shifting the first oil suction channel 21 on the eccentric shaft 20 and / or the second oil suction channel 31 on the short shaft 30 toward the low-pressure zone, that is, the present invention can set a single segment of the oil suction channel to be shifted toward the low-pressure zone, or multiple segments of the oil suction channel can be shifted toward the low-pressure zone, so that the hollowed-out area of ​​the crankshaft in the high-pressure zone is relatively smaller than that in the low-pressure zone, thereby effectively increasing the rigidity and support capacity of the high-pressure zone of the crankshaft, significantly improving the reliability and durability of the crankshaft, and effectively improving the performance and reliability of the compressor.

[0030] In this embodiment of the invention, an oil storage groove 22 is recessed on the outer side wall of the eccentric shaft 20. Furthermore, an oil suction hole 32 is provided on the outer side wall of the short shaft 30, and the oil suction hole 32 is connected to the second oil suction channel 31. The oil storage groove 22 and the oil suction hole 32 are located on opposite sides of the dividing line.

[0031] Optionally, in some embodiments of this utility model, the axis of the first oil suction channel 21 is offset toward the low-pressure area, and the distance between the axis of the first oil suction channel 21 and the dividing line is L1, 0.2mm≤L1≤5mm.

[0032] Optionally, in some embodiments of this utility model, the axis of the second oil suction channel 31 is offset toward the low-pressure area, and the distance between the axis of the second oil suction channel 31 and the dividing line is L2, 0.2mm≤L2≤5mm.

[0033] Optionally, in some embodiments of this utility model, the axis of the first oil suction channel 21 and the axis of the second oil suction channel 31 are offset toward the low-pressure area, the distance between the axis of the first oil suction channel 21 and the dividing line is L3, 0.2mm≤L3≤5mm, and the distance between the axis of the second oil suction channel 31 and the dividing line is L4, 0.2mm≤L4≤5mm.

[0034] Optionally, in some embodiments of the present invention, the first oil suction channel 21 and the second oil suction channel 31 are coaxially arranged, and the inner diameter of the first oil suction channel 21 is equal to the inner diameter of the second oil suction channel 31.

[0035] The following is combined with Figures 1 to 5 The following detailed description is based on a specific embodiment of the crankshaft of this utility model. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of this utility model.

[0036] This embodiment provides a crankshaft, including a long shaft 10, an eccentric shaft 20, and a short shaft 30 connected axially in sequence. An oil supply channel 11 extends through the interior of the long shaft 10 along the axial direction. A first oil suction channel 21, communicating with the oil supply channel 11, extends through the interior of the eccentric shaft 20 along the axial direction. A second oil suction channel 31, communicating with the first oil suction channel 21, extends through the interior of the short shaft 30 along the axial direction. The line connecting the two points of maximum and minimum eccentricity of the eccentric shaft 20 serves as a dividing line. The crankshaft is divided into a high-pressure zone and a low-pressure zone along the axial direction using the dividing line as the dividing line. The axis of the oil supply channel 11 and the axis of the second oil suction channel 31 pass through the dividing line. The axis of the first oil suction channel 21 is offset towards the low-pressure zone. The distance between the axis of the first oil suction channel 21 and the dividing line is L1, 0.2mm ≤ L1 ≤ 5mm. The distance L1 can be selected within the range of 0.2mm to 5mm according to actual needs.

[0037] In this embodiment, an oil reservoir 22 is recessed on the outer wall of the eccentric shaft 20. Furthermore, an oil suction hole 32 is provided on the outer wall of the short shaft 30, and the oil suction hole 32 is connected to the second oil suction channel 31. The oil reservoir 22 and the oil suction hole 32 are located on opposite sides of the dividing line.

[0038] The following is combined with Figures 1 to 5 The following detailed description is based on a specific embodiment of the crankshaft of this utility model. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of this utility model.

[0039] This embodiment provides a crankshaft, including a long shaft 10, an eccentric shaft 20, and a short shaft 30 connected axially in sequence. An oil supply channel 11 extends through the interior of the long shaft 10 along the axial direction. A first oil suction channel 21, communicating with the oil supply channel 11, extends through the interior of the eccentric shaft 20 along the axial direction. A second oil suction channel 31, communicating with the first oil suction channel 21, extends through the interior of the short shaft 30 along the axial direction. The line connecting the two points of maximum and minimum eccentricity of the eccentric shaft 20 serves as a dividing line. The crankshaft is divided into a high-pressure zone and a low-pressure zone along the axial direction using the dividing line as the dividing line. The axis of the oil supply channel 11 and the axis of the first oil suction channel 21 pass through the dividing line. The axis of the second oil suction channel 31 is offset towards the low-pressure zone. The distance between the axis of the second oil suction channel 31 and the dividing line is L2, 0.2mm ≤ L2 ≤ 5mm. The distance L2 can be selected within the range of 0.2mm to 5mm according to actual needs.

[0040] In this embodiment, an oil reservoir 22 is recessed on the outer wall of the eccentric shaft 20. Furthermore, an oil suction hole 32 is provided on the outer wall of the short shaft 30, and the oil suction hole 32 is connected to the second oil suction channel 31. The oil reservoir 22 and the oil suction hole 32 are located on opposite sides of the dividing line.

[0041] The following is combined with Figures 1 to 5The following detailed description is based on a specific embodiment of the crankshaft of this utility model. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of this utility model.

[0042] This embodiment provides a crankshaft, including a long shaft 10, an eccentric shaft 20, and a short shaft 30 connected axially in sequence. An oil supply channel 11 is axially extending through the interior of the long shaft 10. A first oil suction channel 21, connecting the oil supply channel 11, is axially extending through the interior of the eccentric shaft 20. A second oil suction channel 31, connecting the first oil suction channel 21, is axially extending through the interior of the short shaft 30. The line connecting the two points of maximum and minimum eccentricity of the eccentric shaft 20 serves as a dividing line. The crankshaft is divided into a high-pressure zone and a low-pressure zone along the axial direction using the dividing line as the dividing line. The axis of the oil supply channel 11 passes through the dividing line. The axes of the first oil suction channel 21 and the second oil suction channel 31 are both offset towards the low-pressure zone. The distance between the axis of the first oil suction channel 21 and the dividing line is L3, 0.2mm≤L3≤5mm. The distance between the axis of the second oil suction channel 31 and the dividing line is L4, 0.2mm≤L4≤5mm. Among them, the spacing L3 can be selected within the range of 0.2mm to 5mm according to actual needs, and the spacing L4 can be selected within the range of 0.2mm to 5mm according to actual needs.

[0043] In this embodiment, an oil reservoir 22 is recessed on the outer wall of the eccentric shaft 20. Furthermore, an oil suction hole 32 is provided on the outer wall of the short shaft 30, and the oil suction hole 32 is connected to the second oil suction channel 31. The oil reservoir 22 and the oil suction hole 32 are located on opposite sides of the dividing line.

[0044] The following is combined with Figures 1 to 5 The following detailed description is based on a specific embodiment of the crankshaft of this utility model. It is worth understanding that the following is merely an illustrative description and should not be construed as a limitation of this utility model.

[0045] This embodiment provides a crankshaft, including a long shaft 10, an eccentric shaft 20, and a short shaft 30 connected axially in sequence. An oil supply channel 11 is axially extending through the interior of the long shaft 10. A first oil suction channel 21, communicating with the oil supply channel 11, is axially extending through the interior of the eccentric shaft 20. A second oil suction channel 31, communicating with the first oil suction channel 21, is axially extending through the interior of the short shaft 30. The line connecting the two points of maximum and minimum eccentricity of the eccentric shaft 20 serves as a dividing line. The crankshaft is divided into a high-pressure zone and a low-pressure zone along the axial direction using the dividing line as the dividing line. The axis of the second oil suction channel 31 passes through the dividing line. The axes of both the oil supply channel 11 and the first oil suction channel 21 are offset towards the low-pressure zone. The distance between the axis of the first oil suction channel 21 and the dividing line is L1, 0.2mm ≤ L1 ≤ 5mm. The distance L1 can be selected within the range of 0.2mm to 5mm according to actual needs. Furthermore, the offset of the oil supply channel 11 can be selected within the range of 0.2mm to 2mm according to actual needs.

[0046] In this embodiment, an oil reservoir 22 is recessed on the outer wall of the eccentric shaft 20. Furthermore, an oil suction hole 32 is provided on the outer wall of the short shaft 30, and the oil suction hole 32 is connected to the second oil suction channel 31. The oil reservoir 22 and the oil suction hole 32 are located on opposite sides of the dividing line.

[0047] A second aspect of this invention provides a compressor comprising the crankshaft described above. The compressor according to this invention effectively enhances the rigidity and support of the crankshaft in high-pressure areas, thereby improving the reliability and durability of the crankshaft.

[0048] A third aspect of this utility model provides a heating, ventilation, and air conditioning (HVAC) device, which includes the compressor described in any of the above-mentioned embodiments. The HVAC device according to this utility model can effectively enhance the rigidity and support of the crankshaft in high-pressure areas, thereby improving the reliability and durability of the crankshaft.

[0049] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the crankshaft, compressor, and HVAC equipment of this utility model. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A crankshaft, characterized in that: It includes a long shaft, an eccentric shaft, and a short shaft connected axially in sequence. The long shaft has an oil supply channel extending through it in the axial direction. The eccentric shaft has a first oil suction channel extending through it in the axial direction and communicating with the oil supply channel. The short shaft has a second oil suction channel extending through it in the axial direction and communicating with the first oil suction channel. The line connecting the two points with the maximum and minimum eccentricity of the eccentric shaft serves as the dividing line. The crankshaft is divided into a high-pressure zone and a low-pressure zone along the axial direction using the dividing line as the dividing line. The axis of the first oil suction channel and / or the axis of the second oil suction channel are offset toward the low-pressure zone.

2. The crankshaft according to claim 1, characterized in that: The axis of the first oil suction channel is offset toward the low-pressure area, and the distance between the axis of the first oil suction channel and the dividing line is L1, 0.2mm≤L1≤5mm.

3. The crankshaft according to claim 1, characterized in that: The axis of the second oil suction channel is offset toward the low-pressure area, and the distance between the axis of the second oil suction channel and the dividing line is L2, 0.2mm≤L2≤5mm.

4. The crankshaft according to claim 1, characterized in that: The axes of the first oil suction channel and the second oil suction channel are offset toward the low-pressure area, respectively. The distance between the axis of the first oil suction channel and the dividing line is L3, 0.2mm≤L3≤5mm, and the distance between the axis of the second oil suction channel and the dividing line is L4, 0.2mm≤L4≤5mm.

5. The crankshaft according to claim 4, characterized in that: The first oil suction channel and the second oil suction channel are arranged on the same axis, and the inner diameter of the first oil suction channel is equal to the inner diameter of the second oil suction channel.

6. The crankshaft according to claim 1, characterized in that: The axis of the oil supply channel passes through the dividing line, or the axis of the oil supply channel is offset toward the low-pressure area.

7. The crankshaft according to claim 1, characterized in that: An oil storage groove is recessed on the outer wall of the eccentric shaft.

8. The crankshaft according to claim 1, characterized in that: An oil suction hole is provided on the outer side wall of the short shaft, and the oil suction hole is connected to the second oil suction channel.

9. A compressor, characterized in that: Includes the crankshaft according to any one of claims 1 to 8.

10. A heating, ventilation, and air conditioning (HVAC) device, characterized in that: Includes the compressor as described in claim 9.

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