Crankshaft and compressor

Abstract

The invention relates to a crankshaft and a compressor. The crankshaft comprises an eccentric shaft and a long shaft, the eccentric shaft is provided with a first oil hole, and the first oil hole is provided with a first oil inlet end and a first oil outlet end; the long shaft is arranged below the eccentric shaft and provided with a first oil groove, the first oil groove is provided with a second oil inlet end and a second oil outlet end, the first oil inlet end is communicated with the second oil outlet end, the long shaft is provided with a corner area at the second oil outlet end, and a chip groove is formed in the corner area. According to the crankshaft, the chip grooves are formed in the corner areas, so that impurity particles can be effectively guided out during centrifugal movement of the crankshaft, meanwhile, the crankshaft can be well sealed, and a large amount of lubricating oil is prevented from leaking at the corner areas.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and specifically relates to a crankshaft and a compressor. Background Art

[0002] When the compressor operates, under the action of the centrifugal force of the crankshaft, the refrigeration oil rises from the oil sump at the bottom of the casing through the spiral groove on the surface of the crankshaft to the main oil hole. Then, after passing through two inclined oil holes connecting the long / short shafts, it reaches the short shaft oil hole. Finally, a part of the lubricating oil is centrifugally splashed from the top of the short shaft, and a part passes through the connecting rod oil hole to lubricate the cylinder and the piston, and finally flows back into the oil sump at the bottom of the casing again to complete a cycle.

[0003] During the circulation process of the lubricating oil, it will inevitably carry up the impurity particles washed to the bottom of the casing again along the oil path. Due to the structural limitation of the eccentricity of the long and short shafts, the inclined oil hole connecting the long and short shafts is opposite to the direction of the centrifugal force. If there are particle impurities flowing upward along the oil path, due to the different densities of the impurity particles and the oil, there is a high probability that they will be "blocked" here.

[0004] Under the action of the centrifugal force, due to the difference in the density of the particle impurities, not all the particle impurities flow with the oil. On the contrary, there is a sudden "inflection point" at the connection between the oil groove and the oil hole, and the particle impurities will deposit here and cannot be discharged, thereby causing wear of the crankshaft. Summary of the Invention

[0005] Based on the above description, the present invention provides a crankshaft and a compressor, aiming to solve the problem that particle impurities will deposit at the connection between the oil groove and the oil hole during the centrifugal movement of the existing crankshaft.

[0006] The technical solution for the present invention to solve the above technical problems is as follows: A crankshaft, comprising: An eccentric shaft having a first oil hole with a first oil inlet end and a first oil outlet end; A long shaft disposed below the eccentric shaft, the long shaft having a first oil groove with a second oil inlet end and a second oil outlet end, the first oil inlet end communicating with the second oil outlet end, and the long shaft having a corner area at the second oil outlet end, and a chip discharge groove is formed in the corner area.

[0007] On the basis of the above technical solution, the present invention can be further improved as follows.

[0008] Further, the depth of the chip discharge groove is 0.03 mm to 0.09 mm.

[0009] Further, a pressure relief hole is formed in the eccentric shaft, one end of the pressure relief hole communicating with the first oil hole, and the other end of the pressure relief hole communicating with the outside of the eccentric shaft.

[0010] Furthermore, the pressure relief hole has a sealing hole, and a pressure relief piece is arranged in the sealing hole.

[0011] Furthermore, the pressure relief member includes a sphere and an elastic member which are sequentially arranged toward the outlet end of the sealing hole, one end of the elastic member abuts against the sphere, and the other end of the elastic member abuts against the outlet end of the sealing hole.

[0012] Furthermore, it includes a chip collection component, which includes a box body and an attraction member, the box body is sleeved on the long axis, the box body is located between the eccentric shaft and the chip groove, the box body has a accommodating cavity, the box body has a connecting hole corresponding to the chip groove, the connecting hole is connected to the accommodating cavity, and the attraction member is arranged in the accommodating cavity.

[0013] Furthermore, the chip collecting assembly includes a plurality of balls, the plurality of balls are arranged on a side wall of the box body away from the long axis, and the plurality of balls are arranged at intervals around the axis of the box body.

[0014] Furthermore, the box body is provided with a second oil hole corresponding to each of the balls.

[0015] Furthermore, the box body is provided with a second oil groove extending from the second oil hole to the ball.

[0016] In a second aspect, a compressor comprises the crankshaft described in the first aspect.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: (1) The present application provides a chip removal groove in the corner area, which can effectively remove foreign particles when the crankshaft is in centrifugal motion, and at the same time can be well sealed to prevent a large amount of lubricating oil from leaking here.

[0018] (2) In the present application, when the lubricating oil compresses the air through the first oil hole to increase the pressure of the first oil hole, the compressed air can be discharged from the pressure relief hole, thereby preventing the pressure of the first oil hole from being too high.

[0019] (3) The present application absorbs the particulate impurities through the suction element, and can collect the particulate impurities in a centralized manner, thereby preventing the particulate impurities from returning to the oil pool and contaminating the lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 This is an assembly drawing of a crankshaft and a compressor provided in an embodiment of the present invention; Figure 2 This is a side view of a crankshaft and a compressor provided in an embodiment of the present invention; Figure 3 This is an assembly drawing of some other embodiments of the connecting member in an embodiment of the present invention; Figure 4 This is a vertical sectional view of some other embodiments of the connecting member in an embodiment of the present invention; Figure 5 This is a schematic structural diagram of a support rod in an embodiment of the present invention; Figure 6 This is a vertical sectional view of a cylinder body in an embodiment of the present invention.

[0022] Explanation of reference numerals: 1. Eccentric shaft; 11. First oil hole; 111. First oil inlet end; 112. First oil outlet end; 12. Pressure relief hole; 121. Sealing hole; 122. Pressure relief member; 1221. Sphere; 1222. Elastic member; 2. Long shaft; 21. First oil groove; 211. Second oil inlet end; 212. Second oil outlet end; 22. Chip removal groove; 3. Chip collection assembly; 31. Box body; 311. Accommodating cavity; 312. Communication hole; 313. Second oil hole; 314. Second oil groove; 32. Attracting member; 33. Ball. Detailed implementation manners

[0023] To facilitate the understanding of the present application, the present application will be described more comprehensively below with reference to the relevant drawings. Embodiments of the present application are shown in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present application is more thorough and comprehensive.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application.

[0025] It will be appreciated that spatial relationship terms such as "under", "below", "lower", "beneath", "above", "upper", etc. can be used herein to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device during use and operation. For example, if the device in the drawings is flipped, an element or feature described as "below other elements" or "beneath it" or "under it" will be oriented "above" the other elements or features. Thus, the exemplary terms "below" and "under" can include both the upper and lower orientations. In addition, the device may also include additional orientations (such as rotating 90 degrees or other orientations), and the spatial descriptors used herein are accordingly interpreted.

[0026] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprises" / "comprising" or "has" / "having", etc. specify the presence of the stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

[0027] Referring to Figures 1 to 2 As shown, the present invention provides a technical solution: a crankshaft, comprising an eccentric shaft 1 and a long shaft 2; the eccentric shaft 1 has a first oil hole 11, and the first oil hole 11 has a first oil inlet end 211 and a first oil outlet end 212; the long shaft 2 is disposed below the eccentric shaft 1, the long shaft 2 has a first oil groove 21, the first oil groove 21 has a second oil inlet end 211 and a second oil outlet end 212, the first oil inlet end 211 communicates with the second oil outlet end 212, and the long shaft 2 has a corner area at the second oil outlet end 212, and a chip discharge groove 22 is formed in the corner area.

[0028] In this embodiment, by providing the chip discharge groove 22 in the corner area, when the crankshaft performs centrifugal motion, impurity particles can be effectively discharged, and at the same time, it can be better sealed to avoid a large amount of lubricating oil leaking here.

[0029] Optionally, the depth of the chip discharge groove 22 is 0.03 mm to 0.09 mm.

[0030] Preferably, the depth of the chip discharge groove 22 is 0.06 mm to 0.07 mm.

[0031] Referring to Figure 3 As shown, in some embodiments, a pressure relief hole 12 is formed in the eccentric shaft 1, one end of the pressure relief hole 12 communicates with the first oil hole 11, and the other end of the pressure relief hole 12 communicates with the outside of the eccentric shaft 1.

[0032] In this embodiment, due to the high-speed centrifugal motion of the crankshaft, the lubricating oil compresses the air through the first oil hole 11, causing the pressure of the first oil hole 11 to rise. At this time, the compressed air can be discharged from the pressure relief hole 12, thereby preventing the pressure of the first oil hole 11 from being too high.

[0033] Referring to Figure 3 As shown, in some embodiments, the pressure relief hole 12 has a sealing hole 121, and a pressure relief member 122 is provided in the sealing hole 121.

[0034] Exemplarily, the pressure relief member 122 can be a pressure relief valve.

[0035] In this embodiment, through the pressure relief member 122, not only can the pressure relief hole 12 be sealed, but also when the pressure of the first oil hole 11 is too high, the first oil hole 11 can be relieved of pressure.

[0036] Referring to Figure 4 As shown, in some embodiments, the pressure relief member 122 includes a sphere 1221 and an elastic member 1222 arranged in sequence towards the outlet end of the sealing hole 121. One end of the elastic member 1222 abuts against the sphere 1221, and the other end of the elastic member 1222 abuts against the outlet end of the sealing hole 121.

[0037] Exemplarily, the elastic member 1222 can be a spring or an elastic rubber ring, etc.

[0038] In this embodiment, when there is no pressure relief, the sphere 1221 abuts against the inlet end of the sealing hole 121 to abut against the inlet of the sealing hole 121. When relieving pressure, the compressed air pushes the sphere 1221 to move towards the outlet end of the sealing hole 121 and causes the elastic member 1222 to deform. At this time, the compressed air can enter the sealing hole 121 from around the sphere 1221 and enter the pressure relief hole 12 from the sealing hole 121 to relieve the pressure of the first oil hole 11.

[0039] Referring to Figures 1 to 2 and Figures 5 to 6 As shown, in some embodiments, it includes a chip collecting assembly 3. The chip collecting assembly 3 includes a box body 31 and an attracting member 32. The box body 31 is sleeved on the long shaft 2. The box body 31 is located between the eccentric shaft 1 and the chip discharging groove 22. The box body 31 has a receiving cavity 311. The box body 31 is provided with a communication hole 312 corresponding to the chip discharging groove 22. The communication hole 312 communicates with the receiving cavity 311. The attracting member 32 is arranged in the receiving cavity 311.

[0040] Exemplarily, the box body 31 can be of a split design, that is, the box body 31 includes a base plate and a housing, and the housing is detachably connected to the base plate. The attracting member 32 can be a magnet, etc.

[0041] In this embodiment, when the particulate impurities are concentrated in the chip discharge groove 22, the particulate impurities can enter the accommodation through the chip discharge groove 22. With the centrifugal movement of the crankshaft, the particulate impurities move around the accommodation cavity 311; at the same time, the attracting member 32 adsorbs the particulate impurities, and the particulate impurities can be centrally collected to prevent the possibility of the particulate impurities returning to the oil sump and contaminating the lubricating oil.

[0042] Referring to Figures 5 to 6 As shown, in some embodiments, the chip collecting assembly 3 includes a plurality of balls 33, and the plurality of balls 33 are arranged on the side wall of the box body 31 facing away from the long shaft 2, and the plurality of balls 33 are arranged at intervals around the axis of the box body 31.

[0043] In this embodiment, the plurality of balls 33 can contact the compressor housing. When the crankshaft moves centrifugally, on the one hand, it can reduce the friction between the crankshaft and the housing to ensure smooth rotation of the crankshaft; on the other hand, even when there are particulate impurities between the crankshaft and the housing, it can reduce the friction loss on the surface of the crankshaft.

[0044] Referring to Figures 5 to 6 As shown, in some embodiments, the box body 31 is provided with second oil holes 313 corresponding to each ball 33.

[0045] In this embodiment, when the particulate impurities are in the accommodation cavity 311, under the action of centrifugal force, the remaining lubricating oil of the particulate impurities is discharged from the second oil holes 313 and flows to the balls 33, so that the remaining lubricating oil lubricates the balls 33 to reduce the friction between the balls 33 and the box body 31.

[0046] In some embodiments, a filter membrane is provided in the second oil holes 313.

[0047] In this embodiment, the remaining lubricating oil passes through the filter membrane, and the particulate impurities can be retained in the accommodation cavity 311, thereby preventing the particulate impurities from entering the mounting holes of the balls 33.

[0048] Referring to Figures 5 to 6 As shown, in some embodiments, the box body 31 is provided with second oil grooves 314 extending from the second oil holes 313 to the balls 33.

[0049] In this embodiment, the second oil grooves 314 can play a guiding role and enable the remaining lubricating oil to flow to the balls 33.

[0050] The present invention provides a technical solution: a compressor, including the crankshaft according to the above.

[0051] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A crankshaft, characterized in that, include: The eccentric shaft (1) has a first oil hole (11), wherein the first oil hole (11) has a first oil inlet end (211) and a first oil outlet end (212); The long shaft (2) is arranged below the eccentric shaft (1), the long shaft (2) has a first oil groove (21), the first oil groove (21) has a second oil inlet end (211) and a second oil outlet end (212), the first oil inlet end (211) is connected to the second oil outlet end (212), the long shaft (2) has a corner area at the second oil outlet end (212), and the corner area is provided with a chip removal groove (22).

2. The crankshaft according to claim 1, characterized in that, The depth of the chip removal groove (22) is 0.03 mm to 0.09 mm.

3. The crankshaft according to claim 1, characterized in that, The eccentric shaft (1) is provided with a pressure relief hole (12), one end of the pressure relief hole (12) is connected to the first oil hole (11), and the other end of the pressure relief hole (12) is connected to the outside of the eccentric shaft (1).

4. The crankshaft according to claim 3, characterized in that The pressure relief hole (12) has a sealing hole (121), and a pressure relief piece (122) is arranged in the sealing hole (121).

5. The crankshaft according to claim 4, characterized in that, The pressure relief member (122) comprises a sphere (1221) and an elastic member (1222) which are sequentially arranged towards the outlet end of the sealing hole (121); one end of the elastic member (1222) abuts against the sphere (1221), and the other end of the elastic member (1222) abuts against the outlet end of the sealing hole (121).

6. The crankshaft according to claim 1, characterized in that, The invention comprises a chip collecting assembly (3), wherein the chip collecting assembly (3) comprises a box body (31) and an attracting member (32), wherein the box body (31) is sleeved on the long shaft (2), the box body (31) is located between the eccentric shaft (1) and the chip discharge groove (22), the box body (31) has a receiving cavity (311), the box body (31) is provided with a communicating hole (312) corresponding to the chip discharge groove (22), the communicating hole (312) is connected to the receiving cavity (311), and the attracting member (32) is arranged in the receiving cavity (311).

7. The crankshaft according to claim 6, wherein The chip collecting assembly (3) comprises a plurality of balls (33), the plurality of balls (33) being arranged on a side wall of the box body (31) away from the long axis (2), and the plurality of balls (33) being arranged at intervals around the axis of the box body (31).

8. The crankshaft according to claim 7, characterized in that, The box body (31) is provided with a second oil hole (313) corresponding to each of the rolling balls (33).

9. The crankshaft according to claim 8, characterized in that, The box body (31) is provided with a second oil groove (314) extending from the second oil hole (313) to the ball (33).

10. A compressor, characterized in that, Comprising a crankshaft according to any one of claims 1 to 9.

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