CN218093357U

CN218093357U - Crankshaft, compressor and refrigeration equipment

Info

Publication number: CN218093357U
Application number: CN202222479201.7U
Authority: CN
Inventors: 张安州
Original assignee: Anhui Meizhi Compressor Co Ltd
Current assignee: Anhui Meizhi Compressor Co Ltd
Priority date: 2022-09-16
Filing date: 2022-09-16
Publication date: 2022-12-20
Anticipated expiration: 2032-09-16

Abstract

The utility model discloses a bent axle, compressor and refrigeration plant, wherein, the bent axle is used for the compressor, the compressor has the oil bath, the bent axle is including main shaft, balancing piece, countershaft, the district of stepping down and outer axle that connects gradually: a main shaft oil groove is formed in the outer wall of the main shaft; the main shaft is provided with a main shaft oil hole and a connecting hole, the main shaft oil hole is communicated with the main oil duct, and the connecting hole is communicated with the auxiliary oil duct; a first thrust surface is formed on one side, facing the main shaft, of the balance block, and a thrust surface oil groove is formed in the first thrust surface; the connecting hole is communicated with the thrust surface oil groove; the main shaft is provided with a connecting oil groove communicated with the thrust surface oil groove and the main shaft oil groove; the utility model discloses an adopt the main oil gallery of intercommunication oil bath to guide the fluid in the oil bath to the balancing piece direction, utilize the main shaft oilhole of intercommunication main oil gallery to guide the fluid in the main oil gallery to first thrust surface to improve the lubricating property of the friction surface of balancing piece.

Description

Crankshaft, compressor and refrigeration equipment

Technical Field

The utility model relates to a compressor field, in particular to bent axle, compressor and refrigeration plant.

Background

The compressor is provided with a driving mechanism, a crankcase and a crankshaft, and the crankshaft is driven to rotate relatively in the crankcase through the driving mechanism so as to drive the piston to move. But the crankshaft is more limited, and in order to reduce the abrasion of the crankshaft in the operation process, a better oil way lubricating system needs to be designed. In the existing crankshaft lubrication system, the lubrication effect of the assembly surface of the crankshaft is poor, and a poor oil circuit lubrication system directly causes the aggravation of the abrasion between the crankshaft and the crankcase, thereby affecting the performance of the compressor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a bent axle, aim at solving the too big problem of assembly face friction loss of current bent axle and crankcase.

In order to achieve the above object, the utility model provides a bent axle for the compressor, the compressor has the oil bath, the bent axle is including the main shaft, balancing piece, countershaft, the district of stepping down and the outer axle that connects gradually:

the crankshaft is provided with a main oil duct and an auxiliary oil duct, the main oil duct is arranged in the main shaft, and the auxiliary oil duct is communicated with the main oil duct and sequentially penetrates through the main shaft, the balance block, the auxiliary shaft, the abdicating area and the outer shaft;

a main shaft oil groove is formed in the outer wall of the main shaft; the main shaft is provided with a main shaft oil hole and a connecting hole, the main shaft oil hole is communicated with the main oil duct, and the connecting hole is communicated with the auxiliary oil duct;

a first thrust surface is formed on one side, facing the main shaft, of the balance block, and a thrust surface oil groove is formed in the first thrust surface; the connecting hole is communicated with the thrust surface oil groove; the main shaft is provided with a connecting oil groove which is communicated with the thrust surface oil groove and the main shaft oil groove;

an auxiliary shaft oil groove is formed in the outer wall of the auxiliary shaft, and an auxiliary shaft oil hole for communicating the auxiliary shaft oil groove with the auxiliary oil duct is formed in the auxiliary shaft;

an outer shaft oil groove is formed in the outer wall of the outer shaft, and the outer shaft is further provided with an outer shaft oil hole communicated with the outer shaft oil groove and the auxiliary oil duct.

In some examples, the main shaft is concentric with the outer shaft and has the same shaft diameter; the shaft diameter of the auxiliary shaft is not smaller than that of the outer shaft;

and/or the projection profile of the relief area in the axial direction is not larger than the projection of the auxiliary shaft in the axial direction.

In some examples, the spindle oil hole is a straight hole;

and/or the connecting hole is a straight hole;

and/or the auxiliary shaft oil hole is a straight hole;

and/or the outer shaft oil hole is a straight hole;

and/or a boss is arranged on the outer shaft.

In some examples, the spindle oil groove is a spiral groove formed around the outer circumferential wall of the spindle to rise rightward;

and/or the auxiliary shaft oil groove is a spiral groove which is formed around the outer peripheral wall of the auxiliary shaft and ascends rightwards;

and/or the outer shaft oil groove is a spiral groove formed around the outer peripheral wall of the outer shaft and rising rightward.

In some examples, the outer shaft oil groove, the auxiliary shaft oil groove, and the main shaft oil groove each have a spiral direction the same as a rotation direction of the crankshaft, and the outer shaft oil groove, the auxiliary shaft oil groove, and the main shaft oil groove each have a spiral angle of 40 ° to 50 °.

In some examples, the first thrust surface is an annular flat surface.

In some examples, the thrust surface oil groove surrounds the first thrust surface and the spindle peripheral wall for one circle.

In some examples, the connecting oil groove is a straight oil groove.

In some examples, the number of the auxiliary oil passages is at least one, and an opening of one end of the auxiliary oil passage, which is far away from the main oil passage, is located on an end face of one side of the outer shaft, which is far away from the relief area.

In some examples, the secondary oil gallery and the main oil gallery are both oil galleries that are circular in cross-section.

In some examples, the angle between the secondary gallery axis and the main gallery axis is 0 ° to 5 °.

In some examples, the main oil gallery has an open end for communicating with the oil sump and a tip end remote from the open end, and the tip end of the main oil gallery is an arc surface or a conical surface.

On the basis of the example of above-mentioned bent axle, the utility model discloses still provide a compressor, include:

a crankshaft as in any of the examples above; and

the crankcase is provided with a shaft hole, a main shaft of the crankshaft is rotatably arranged in the shaft hole, the crankcase is provided with a second thrust surface opposite to the first thrust surface, an assembly gap is formed between the first thrust surface and the second thrust surface, and one end, far away from the main oil gallery, of the main shaft oil hole is communicated with the assembly gap.

On the basis of the example of the compressor, the invention also provides a refrigeration device, which comprises the compressor as described in the above example.

The utility model discloses technical scheme is through adopting the main oil gallery of intercommunication oil bath with the fluid in the oil bath to the guide of balancing piece direction, utilizes the main shaft oilhole of intercommunication main oil gallery to guide the fluid in the main oil gallery to thrust face oil groove and first thrust face, and then lubricates the first thrust face of balancing piece to improve the lubricating property of the friction surface of balancing piece.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic structural view of an embodiment of a crankshaft of the present invention;

FIG. 2 is a front view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line 2a-2a of FIG. 2;

fig. 4 is a top view of fig. 1.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 and 2, an example of the present invention provides a crankshaft for a compressor having an oil sump, the crankshaft communicating with the oil sump. When the crankshaft rotates, oil in an oil pool of the compressor can flow along the crankshaft in a direction away from the oil pool.

Referring to fig. 3 in combination, in some examples, the crankshaft includes a primary shaft 10, a counterweight 20, and a secondary shaft 30.

The main shaft 10 is provided with a first end close to the compressor oil pool and a second end far away from the compressor oil pool, and the main shaft 10 is provided with a main oil duct 11 communicated with the oil pool; an opening is formed at one end of the main oil gallery 11, and the end, provided with the opening, of the main oil gallery 11 is used as an opening end and is communicated with an oil pool of the compressor; the main oil gallery 11 extends away from the oil sump of the compressor. When the crankshaft rotates, under the action of centrifugal force, oil in the oil sump of the compressor flows along the main oil gallery 11 in a direction away from the oil sump of the compressor. In some examples, the main oil gallery 11 is a passage with a circular cross section, and by forming the circular passage, when oil flows along the main oil gallery 11, resistance of the oil during flowing can be effectively reduced, and noise and resistance caused by vortex when the oil flows are avoided.

In some examples, the main shaft 10 is provided with a main shaft oil hole 13 communicating with the main oil gallery 11, and during rotation of the crankshaft, oil in the main oil gallery 11 enters the main shaft oil hole 13 under centrifugal force, and reaches the outer surface of the main shaft 10 through the main shaft oil hole 13, and is used for lubricating the outer peripheral wall of the main shaft 10. In some examples, the main shaft oil hole 13 is a straight hole to reduce resistance when oil flows, and at the same time, to facilitate the hole opening.

A balance weight 20 connected to the main shaft 10; the maximum outer diameter of the balance weight 20 is larger than the maximum outer diameter of the main shaft 10, so that the balance weight 20 can be used for matching with a crankcase (not shown in the figure) to limit the crankshaft. The counterbalance 20 can also act as a counterbalance to the crankshaft assembly to reduce the amplitude and frequency of vibration after the crankshaft rotates at high speed, to avoid the crankshaft producing a momentum peak, and thus to avoid the crankshaft breaking.

The balance weight 20 is formed with a first thrust surface 21, the first thrust surface 21 is an end surface of the balance weight 20 facing the main shaft 10, and the first thrust surface 21 forms a friction pair with an inner wall surface of the crankcase. In some examples, the counterbalance 20 is provided integrally with the main shaft 10. In some examples, the first thrust surface 21 is an annular surface that surrounds the outer circumference of the spindle 10.

Further, the crankshaft also includes a relief area 40 and an outer shaft 50. The relief area 40 is connected to an end of the auxiliary shaft 30 facing away from the balance weight 20; the outer shaft 50 is connected to the end of the relief area 40 facing away from the auxiliary shaft 30; the outer shaft 50 is disposed concentrically with the main shaft 10. The outer shaft 50 may be used to connect the outer bearings when the crankshaft is mounted to the compressor. In some examples, the outer shaft 50, the relief area 40, the secondary shaft 30, the counterbalance mass 20, and the primary shaft 10 are integrally provided.

In some examples, a boss 53 is disposed at an end of the outer shaft 50 away from the relief area 40, and when the crankshaft is installed, a balance weight is installed on the outer shaft 50 of the crankshaft, and the balance weight is used for balancing the crankshaft, so as to reduce the vibration amplitude and frequency of the crankshaft after the crankshaft rotates at a high speed, avoid the crankshaft from generating a momentum peak value, and further avoid the crankshaft from being broken. Further, in some examples, a through hole is provided on the upper balance weight, and the boss 53 is inserted into the through hole of the upper balance weight and is in interference fit with the upper balance weight to achieve the fixation of the upper balance weight and the outer shaft 50.

It will be appreciated that the crankshaft is intended for a compressor which also comprises other functional components, such as a crankcase having an axial bore in which a main shaft 10 of the crankshaft is rotatably mounted so that the crankshaft can be rotated relative to one another by a drive means such as an electric motor. The crankcase has a second thrust surface, and when the crankshaft is mounted on the crankcase, the first thrust surface 21 of the balance weight 20 is disposed opposite to the second thrust surface of the crankcase so that a fitting clearance is formed between the first thrust surface 21 and the second thrust surface.

Further, in some examples, the main shaft 10 is opened with a main shaft oil hole 13, and one end of the main shaft oil hole 13 is communicated with the main oil gallery 11, and the other end is communicated with the first thrust surface 21. When the crankshaft rotates, oil in the main oil gallery 11 flows to the first thrust surface 21 along the main shaft oil hole 13 under the action of centrifugal force to convey the oil to the first thrust surface 21, and the oil enters an assembly gap between the first thrust surface 21 and the second thrust surface, so that lubrication of the friction surface of the balance block 20 is realized, and friction damage of the friction surface is effectively reduced. In some examples, the main oil gallery 11 has an open end for communicating with an oil pool and a top end far away from the open end, the top end of the main oil gallery 11 is a cambered surface or a conical surface, the main shaft oil hole 13 penetrates to the top end of the main oil gallery 11, oil flows to the top end along the main oil gallery 11, and when the top end position is reached, a vortex generated when the oil flows along the cambered surface or the conical surface of the top end is relatively small; the oil flows to the outer wall surface of the main shaft 10 through the main shaft oil hole 13 and continues to flow to the first thrust surface 21 of the balance weight 20 to deliver the oil to the first thrust surface 21. Through the arc or the conical surface of the top end of the main oil gallery 11 communicating the main shaft oil hole 13, the resistance of oil entering the first main oil gallery 11 can be reduced, and the problem of insufficient lubrication caused by the reduction of the output oil quantity is avoided.

And the auxiliary shaft 30 is connected with one side of the balance weight 20, which is far away from the main shaft 10, and the auxiliary shaft 30 is arranged eccentrically with the main shaft 10. The countershaft 30 is used to connect the pistons when the countershaft 30 is installed in the compressor. The auxiliary shaft 30 is eccentrically arranged with respect to the main shaft 10, which means that the axis of the auxiliary shaft 30 and the axis of the main shaft 10 are arranged offset from each other. In some examples, the secondary shaft 30, the counterbalance 20, and the primary shaft 10 are integrally provided.

Because the oil can be conveyed to the main shaft oil hole 13 along the main oil gallery 11 and flows to the outside of the main shaft 10 by using the main shaft oil hole 13, the oil located outside the main shaft 10 can lubricate the outer surface of the main shaft 10, and meanwhile, the redundant oil can flow to the first thrust surface 21 to lubricate the friction surface of the balance block 20, so that the friction loss of the friction surface of the balance block 20 is effectively reduced.

Referring to fig. 2, in some examples, a connecting oil groove 15 is formed on an outer surface of the spindle 10, one end of the connecting oil groove 15 is communicated with the spindle oil hole 13, and the other end of the connecting oil groove 15 is communicated with the first thrust surface 21, so as to guide oil output from the spindle oil hole 13 to the first thrust surface 21. To control the amount of oil in the first thrust surface 21, in some examples, the width of the connecting oil groove 15 is smaller than the diameter of the first oil hole. In some examples, the connecting oil grooves 15 are straight oil grooves to shorten the oil flow path length and reduce the oil flow resistance.

With reference to fig. 2 and fig. 3, further, in some examples, a liquid collecting tank 16 is disposed on an outer wall surface of one end of the main shaft 10 close to the balance weight 20, the liquid collecting tank 16 is a groove concavely disposed on the main shaft 10, and the liquid collecting tank 16 is communicated with the first thrust surface 21, so that oil in the liquid collecting tank 16 can flow to the first thrust surface 21; one end of the connecting oil groove 15 away from the main shaft oil hole 13 communicates with the sump 16 to supply oil to the sump 16. The sump 16 may be an annular groove formed around the main shaft 10 to form an annular accumulation area on the side of the main shaft 10 close to the first thrust surface 21, and the oil enters the sump 16 through the connecting oil groove 15 and accumulates at the sump 16 to continuously supply the oil to the first thrust surface 21 for lubrication. Through setting up the collecting tank 16, can also enlarge the lubricated face of fluid, promote the lubricating property.

Referring to fig. 2 and fig. 3, in some examples, the first thrust surface 21 is provided with a thrust surface oil groove 22, and the spindle oil hole 13 is communicated with the thrust surface oil groove 22. The thrust surface oil groove 22 communicates with the fitting clearance between the first thrust surface 21 and the second thrust surface described in the above example. The thrust surface oil groove 22 is a concave groove formed in the first thrust surface 21, when oil flows from the spindle oil hole 13 to the first thrust surface 21, part of the oil enters the thrust surface oil groove 22, so that a certain amount of oil is stored in the first thrust surface 21, and when the crankshaft rotates, the oil in the thrust surface oil groove 22 can lubricate the first thrust surface 21. Through setting up thrust face oil groove 22, can increase the lubricated area of fluid, promote the lubricating property. In some examples, a connection oil groove 15 is opened on an outer surface of the main shaft 10, one end of the connection oil groove 15 communicates with the main shaft oil hole 13, and the other end of the connection oil groove 15 communicates with the thrust surface oil groove 22 for guiding oil to the thrust surface oil groove 22. In order to increase the lubrication area, in some examples, the thrust surface oil groove 22 is an annular groove disposed around the main shaft 10, so that the first thrust surface 21 of the balance weight 20 can be lubricated when the balance weight 20 rotates. Fluid is in thrust face oil groove 22 internal reserve, can promote lubricated face's oil mass to can increase lubricated area, and then promote lubricated efficiency. In some examples, a liquid collecting groove 16 is formed in an outer wall surface of one end of the main shaft 10 close to the balance block 20, the liquid collecting groove 16 is a groove concavely formed in the main shaft 10, and the liquid collecting groove 16 is communicated with the thrust surface oil groove 22 to convey oil into the thrust surface oil groove 22, so that a lubricating area of the oil is increased.

Referring to fig. 1 and fig. 2, on the basis of any of the above examples, a main shaft oil groove 14 is formed in an outer wall surface of the main shaft 10, the main shaft oil groove 14 is a groove concavely formed in the outer wall surface of the main shaft 10, and the main shaft oil groove 14 is spirally formed along a first direction; one end of the main shaft oil groove 14 close to the balance block 20 is communicated with the first thrust surface 21, and one end of the main shaft oil groove 14 far from the balance block 20 is communicated with the main oil gallery 11 through the main shaft oil hole 13. The oil in the main oil gallery 11 enters the main shaft oil groove 14 through the main shaft oil hole 13 and flows along the main shaft oil groove 14, part of the oil is used for lubricating the outer surface of the main shaft 10, and part of the oil is used for flowing to the first thrust surface 21 to lubricate the first thrust surface 21. In some examples, the spindle 10 is opened with the sump 16 as described in any of the above examples, and an end of the spindle oil groove 14 near the counterweight 20 is communicated with the sump 16, so that oil can enter the sump 16 to enlarge a lubricating surface of the oil on the first thrust surface 21. In some examples, the main shaft 10 is opened with a connecting oil groove 15 as described in any of the above examples, and the connecting oil groove 15 is used for communicating the main shaft oil groove 14 with the sump 16 to guide the oil in the main shaft oil groove 14 into the sump 16. In order to control the amount of oil in the sump 16, the width of the connecting oil groove 15 is smaller than the width of the main shaft oil groove 14. In some examples, the first thrust surface 21 is opened with a thrust surface oil groove 22 as described in any of the above examples, and the spindle oil groove 14 communicates with the thrust surface oil groove 22 to enable oil to be delivered to the first thrust surface 21 and expand the lubrication surface.

In some examples, the main shaft 10 of the crankshaft is a lower end of the crankshaft, the first direction is a spiral direction that rises to the right, and the first direction is the same as the rotation direction of the crankshaft.

Because main shaft oil groove 14 is spiral setting along first direction, for being on a parallel with main shaft 10 axial or the groove structure that sets up along main shaft 10 circumference, the length increase of the main shaft oil groove 14 that is spiral setting can increase main shaft oil groove 14's lubricated area, and then promotes the lubricated effect of main shaft 10's surface. The first direction is consistent with the rotation direction of the crankshaft, so that oil can flow along the crankshaft oil groove under the action of centrifugal force when the crankshaft rotates.

In some examples, the lead angle of the main shaft oil groove 14 is not less than 40 ° and not more than 50 ° to reduce resistance when oil flows and effectively control the amount of oil. When the lead angle of the main shaft oil groove 14 is smaller than 40 °, the oil flow resistance increases, which easily causes the oil amount in the main shaft oil groove 14 to be insufficient, and further causes the oil amount at the first thrust surface 21 to be too small. When the helix angle of the main shaft oil groove 14 is larger than 50 degrees, the oil lifting resistance is small, so that the oil amount in the main shaft oil groove 14 is too large; meanwhile, the length of the main shaft oil groove 14 is relatively small due to the large helix angle, so that the lubricating area of the oil is reduced.

In order to output redundant oil, in some examples, the main shaft 10 is further provided with a connecting hole 12; one end of the main shaft oil groove 14 near the balance weight 20 is communicated with the main oil gallery 11 through a connecting hole 12. The oil in the main shaft oil groove 14 is partially used for lubricating the outer surface of the main shaft 10, is partially used for conveying to the first thrust surface 21 for lubrication, and redundant oil enters the main oil gallery 11 through the connecting hole 12. Further, in some examples, the crankshaft further defines an auxiliary oil gallery 60, one end of the auxiliary oil gallery 60 communicates with the main oil gallery 11, the other end of the auxiliary oil gallery 60 extends away from the oil sump of the compressor, and the connecting hole 12 communicates with the auxiliary oil gallery 60 to output excess oil. In some examples, a secondary oil passage 60 extends through the counterweight 20 and the secondary shaft 30 in sequence and to an end of the crankshaft remote from the oil sump to output excess oil to the exterior of the crankshaft to enable oil to enter the cycle.

In some examples, the contour of the projection of the relief zone 40 in the axial direction is not greater than the contour of the projection of the layshaft 30 in the axial direction to avoid interference of the relief zone 40 with the layshaft 30 and/or the outer shaft 50. In some examples, the axial diameters of the main shaft 10 and the outer shaft 50 are equal to facilitate machining and subsequent installation. In some examples, the shaft diameter of the secondary shaft 30 is no less than the shaft diameter of the outer shaft 50.

In addition to the above-mentioned example of the counter shaft 30, in some examples, the outer wall surface of the counter shaft 30 is provided with a counter shaft oil groove 31, the counter shaft oil groove 31 is a groove concavely formed on the outer wall surface of the counter shaft 30, and the counter shaft oil groove 31 is spirally formed along the first direction; the auxiliary shaft oil groove 31 is communicated with the main oil gallery 11 through an auxiliary shaft oil hole 32; so that the oil in the main oil gallery 11 can enter the countershaft oil groove 31 along the countershaft oil hole 32, and the oil in the countershaft oil groove 31 can lubricate the outer surface of the countershaft 30 to reduce friction loss. Because countershaft oil groove 31 is the spiral setting, can effectively enlarge countershaft oil groove 31's lubricated area, promote lubricated effect. In some examples, a countershaft oil port 32 is provided at an end of the countershaft 30 proximate the counterweight 20 to extend the length of the oil flow path. The first direction coincides with the rotational direction of the crankshaft to allow oil to flow along the counter oil groove 31. The auxiliary oil holes 32 may be straight holes to reduce resistance when oil flows.

In some examples, the pitch angle of the countershaft oil groove 31 is not less than 40 ° and not more than 50 ° to reduce resistance when oil flows and effectively control the amount of oil. The lead angle of the sub-shaft oil groove 31 may be the same as or different from the lead angle of the main shaft oil groove 14 in the above example. In some examples, an end of the countershaft oil groove 31 remote from the countershaft oil hole 32 penetrates to an end surface of the countershaft 30 on a side toward the outer shaft 50, so that the surplus oil flows to an axial end of the countershaft 30 along the countershaft oil groove 31 by a centrifugal force.

In some examples, an auxiliary oil passage 60 is opened on the crankshaft, the auxiliary oil passage 60 communicates with the main oil passage 11 and penetrates through the balance weight 20, and the auxiliary oil passage 32 communicates with the auxiliary oil passage 60, so that oil in the main oil passage 11 can enter the auxiliary oil passage 32 along the auxiliary oil passage 60. Further, in some examples, one end of the auxiliary oil gallery 60 far from the main oil gallery 11 is communicated to one end of the crankshaft far from the oil pool, so that after the redundant oil in the auxiliary oil gallery 60 is output, the oil enters the circulation again.

In some examples, an outer shaft oil groove 51 is opened on an outer wall surface of the outer shaft 50, the outer shaft oil groove 51 is spirally arranged along the first direction, and the outer shaft oil groove 51 is communicated with the main oil gallery 11 through an outer shaft oil hole 52. So that the oil in the main oil gallery 11 can enter the outer shaft oil groove 51 along the outer shaft oil hole 52, and the oil in the outer shaft oil groove 51 can lubricate the outer surface of the outer shaft 50 to reduce friction loss. Because outer axle oil groove 51 is spiral setting, can effectively enlarge outer axle oil groove 51's lubricated area, promote lubricated effect. In some examples, an outer shaft oil hole 52 is provided at an end of the outer shaft 50 near the relief area 40 to extend the length of the oil flow path. The first direction coincides with a rotational direction of the crankshaft to allow oil to flow along the outer shaft oil groove 51. The outer shaft oil hole 52 may be a straight hole to reduce resistance when oil flows.

In some examples, the helical angle of the outer shaft oil groove 51 is not less than 40 ° and not more than 50 ° to reduce resistance when oil flows and effectively control the amount of oil. The lead angle of the outer shaft oil groove 51 may be the same as or different from the lead angle of the main shaft oil groove 14 and/or the sub shaft oil groove 31 in the above examples. In some examples, an end of the outer shaft oil groove 51 remote from the outer shaft oil hole 52 is penetrated to an end surface of the outer shaft 50 on a side remote from the countershaft 30 to flow the surplus oil to an axial end of the outer shaft 50.

In some examples, an auxiliary oil passage 60 is formed on the crankshaft, the auxiliary oil passage 60 communicates with the main oil passage 11 and penetrates through the balance weight 20, and the outer shaft oil hole 52 communicates with the auxiliary oil passage 60, so that oil in the main oil passage 11 can enter the outer shaft oil hole 52 along the auxiliary oil passage 60 and then be conveyed to the outer shaft oil groove 51. Further, in some examples, one end of the auxiliary oil gallery 60 far from the main oil gallery 11 is communicated to one end of the crankshaft far from the oil pool, so that after the redundant oil in the auxiliary oil gallery 60 is output, the oil enters the circulation again.

Further, referring to fig. 1 and 4, in some examples based on the above examples, the auxiliary oil passage 60 corresponding to the auxiliary shaft 30, the auxiliary oil passage 60 corresponding to the outer shaft 50, and the auxiliary oil passage 60 communicated with the second main shaft hole are the same passage. In some examples, the outer shaft 50, the auxiliary shaft 30, and the main shaft 10 are respectively provided with an auxiliary oil passage 60, such that the auxiliary oil passage 60 on the main shaft 10 is used for delivering oil to the main shaft oil hole 13, the auxiliary oil passage 60 on the auxiliary shaft 30 is used for delivering oil to the auxiliary shaft 30, and the auxiliary oil passage 60 on the outer shaft 50 is used for delivering oil to the outer shaft oil hole 52.

The utility model discloses on the basis of above-mentioned bent axle, still provide the example of a compressor, the compressor includes the bent axle as in any of above-mentioned examples. The compressor is provided with an oil sump, and the open end of a main oil gallery 11 of the crankshaft is communicated with the oil sump. During operation of the compressor, the oil in the oil sump may be delivered to the first thrust surface 21 of the balance weight 20 along the main oil gallery 11, so as to reduce friction loss during operation of the compressor.

The crankshaft is used in a compressor which comprises other functional parts, such as a crankcase having a shaft hole, and a main shaft 10 of the crankshaft is rotatably mounted in the shaft hole of the crankcase so that the crankshaft can be relatively rotated by a driving means such as a motor. The crankcase has a second thrust surface, when the crankshaft is mounted on the crankcase, the first thrust surface 21 of the balance weight 20 is arranged opposite to the second thrust surface of the crankcase, and as the whole crankshaft can rotate relative to the crankcase, a mounting gap can be formed between the first thrust surface 21 and the second thrust surface.

The main shaft oil hole 13 communicates with the fitting gap between the first thrust surface 21 and the second thrust surface for lubricating the friction surface between the first thrust surface 21 and the second thrust surface.

It will be appreciated that the compressor may also include other functional components, which may be referred to in the art and will not be described in detail.

It is worth noting that, because the example of the compressor of the present invention is based on the above-mentioned crankshaft, therefore, the present invention includes all the technical solutions of all the above-mentioned crankshaft examples, and the achieved technical effects are also completely the same, and are not repeated herein.

The utility model discloses on the basis of above-mentioned example, still provide the example of a refrigeration plant, including the compressor of above-mentioned example. The refrigeration device may be a refrigerator or other electrical device having a refrigeration function.

It is worth noting, because the utility model discloses refrigeration plant is based on the example of above-mentioned compressor, consequently, the utility model discloses refrigeration plant's example includes all technical scheme of the whole embodiments of above-mentioned compressor, and the technological effect that reaches is also identical, no longer gives unnecessary details here.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a crankshaft for the compressor, the compressor has the oil bath, its characterized in that, the crankshaft includes main shaft, balancing piece, countershaft, abdication district and the outer axle that connects gradually:

a first thrust surface is formed on one side, facing the main shaft, of the balance block, and a thrust surface oil groove is formed in the first thrust surface; the main shaft is provided with a connecting oil groove communicated with the thrust surface oil groove and the main shaft oil groove;

2. The crankshaft of claim 1,

the main shaft and the outer shaft have the same axle center and the same axle diameter; the shaft diameter of the auxiliary shaft is not smaller than that of the outer shaft;

3. The crankshaft of claim 1,

the main shaft oil hole is a straight hole;

and/or the connecting hole is a straight hole;

and/or the auxiliary shaft oil hole is a straight hole;

and/or the outer shaft oil hole is a straight hole;

and/or a boss is arranged on the outer shaft.

4. The crankshaft of claim 1,

the main shaft oil groove is a spiral groove which is formed around the outer peripheral wall of the main shaft and ascends rightwards;

and/or the outer shaft oil groove is a spiral groove which is formed around the outer peripheral wall of the outer shaft and ascends rightwards.

5. The crankshaft of claim 1, wherein the outer shaft oil groove, the auxiliary shaft oil groove, and the main shaft oil groove are all spirally rotated in the same direction as the crankshaft, and the outer shaft oil groove, the auxiliary shaft oil groove, and the main shaft oil groove are all spirally wound at angles of 40 ° to 50 °.

6. The crankshaft of claim 1 wherein said first thrust surface is an annular flat surface.

7. The crankshaft of claim 1 wherein said thrust surface oil groove encircles said first thrust surface and said spindle peripheral wall.

8. The crankshaft of claim 1 wherein said connecting sump is a straight sump.

9. The crankshaft according to claim 1, wherein the number of the auxiliary oil passages is at least one, and an opening of one end of the auxiliary oil passage, which is far away from the main oil passage, is located on an end surface of one side of the outer shaft, which is far away from the relief area.

10. The crankshaft of claim 1 wherein said secondary oil gallery and said primary oil gallery are each circular in cross section.

11. The crankshaft of claim 1 wherein said secondary gallery axis is angled from 0 ° to 5 ° from said main gallery axis.

12. The crankshaft of claim 1, wherein said main oil gallery has an open end for communicating with said oil sump and a top end remote from said open end, said top end of said main oil gallery being cambered or tapered.

13. A compressor, comprising:

a crankshaft as claimed in any one of claims 1 to 12; and

a crankcase having a shaft hole to which a main shaft of the crankshaft is rotatably mounted; the crankcase is provided with a second thrust surface opposite to the first thrust surface, a fitting clearance is formed between the first thrust surface and the second thrust surface, and one end, far away from the main oil gallery, of the main shaft oil hole is communicated with the fitting clearance.

14. A refrigerating apparatus comprising a compressor as claimed in claim 13.