CN220566408U - Crankshaft, crankshaft assembly, compressor and refrigeration equipment - Google Patents

Abstract

The utility model discloses a crankshaft, a crankshaft assembly, a compressor and refrigeration equipment, wherein the crankshaft comprises a main shaft, a balance weight and a secondary shaft which are sequentially connected, a main oil duct is arranged in the main shaft, and a secondary oil duct is arranged in the secondary shaft; the outer wall surface of the main shaft is provided with a first spiral oil groove and a second spiral oil groove which are spirally arranged at intervals along the axial direction of the main shaft; the main shaft is provided with a first lower oil hole and a second lower oil hole which are communicated with the main oil duct, the first lower oil hole is positioned at one end of the first spiral oil groove, and the second lower oil hole is positioned at one end of the second spiral oil groove; the main shaft still is equipped with the first oilhole of going up of intercommunication first spiral oil groove, the second oilhole of going up of intercommunication second spiral oil groove, still is equipped with the intercommunication oil duct of the first oilhole of intercommunication and second oilhole in the main shaft, and intercommunication oil duct and accessory oil duct intercommunication. The technical scheme of the utility model improves the oil pumping capacity of the crankshaft.

Description

Crankshaft, crankshaft assembly, compressor and refrigeration equipment

Technical Field

The utility model relates to the technical field of refrigeration equipment, in particular to a crankshaft, a crankshaft assembly, a compressor and refrigeration equipment.

Background

In the related art, a crankshaft is generally matched with a spiral oil pump or a centrifugal blade, the oil pumping capacity of the spiral oil pump is high, but a certain requirement is met on the clearance between the spiral oil pump and the inner wall of a main shaft, and the cost is also increased; the centrifugal blade has weak oil pumping capacity, but has low cost and lower assembly precision requirement than that of a spiral oil pump. In order to develop the advantages of low cost, high reliability and the like of the centrifugal blade, a new crankshaft structure is needed to improve the problems of weak oil pumping capacity, high oil sealing capacity and the like.

Disclosure of Invention

The utility model mainly aims to provide a crankshaft, a crankshaft assembly, a compressor and refrigeration equipment, and aims to improve oil pumping capacity of the crankshaft.

In order to achieve the above purpose, the crankshaft provided by the utility model comprises a main shaft, a balance weight and a secondary shaft which are sequentially connected, wherein a main oil duct is arranged in the main shaft, and a secondary oil duct is arranged in the secondary shaft; the outer wall surface of the main shaft is provided with a first spiral oil groove and a second spiral oil groove which are arranged at intervals along the axial direction of the main shaft in a spiral manner; the main shaft is provided with a first lower oil hole and a second lower oil hole which are communicated with the main oil duct, the first lower oil hole is positioned at one end of the first spiral oil groove, and the second lower oil hole is positioned at one end of the second spiral oil groove; the main shaft still is equipped with the intercommunication the first oilhole of going up of first spiral oil groove, intercommunication the second oilhole of going up of second spiral oil groove, still be equipped with the intercommunication oil duct of intercommunication the first oilhole and the second oilhole of going up in the main shaft, the intercommunication oil duct with the accessory oil duct intercommunication.

In an embodiment, the first lower oil hole and the second lower oil hole are respectively the same as the distance between the bottom end of the main shaft.

In an embodiment, the first oil feeding hole and the second oil feeding hole are symmetrically arranged; and/or the first lower oil hole and the second lower oil hole are symmetrically arranged.

In an embodiment, the spiral directions of the first spiral oil groove and the second spiral oil groove are the same.

In an embodiment, the auxiliary shaft is provided with a connecting oil duct communicated with the auxiliary oil duct, the connecting oil duct penetrates through the balance weight and is communicated with the communicating oil duct, and the connecting oil duct and the axis of the main shaft are arranged in an included angle.

In an embodiment, the distance from the connection point of the connection oil passage and the communication oil passage to the first upper oil hole and the second upper oil hole is the same.

In an embodiment, the peripheral wall of the auxiliary shaft is further provided with an auxiliary oil hole communicated with the auxiliary oil duct, and the auxiliary oil hole is coaxially arranged with the connecting oil duct.

In an embodiment, the first oil-feeding hole and the second oil-feeding hole have the same aperture; and/or the apertures of the first lower oil hole and the second lower oil hole are the same; and/or the apertures of the first upper oil hole and the first lower oil hole are the same; and/or the apertures of the auxiliary oil hole, the first upper oil hole and the second upper oil hole are the same.

In one embodiment, the aperture of the first upper oil hole and/or the first lower oil hole is 1.5-5.0mm; and/or the groove depth of the first spiral oil groove and/or the second spiral oil groove is 0.5-1.0mm, and the groove width is 0.1-0.5mm.

The utility model also provides a crankshaft assembly, which comprises a crankcase, an eccentric shaft sleeve, a connecting rod and a crankshaft, wherein the crankcase is provided with a first shaft hole; the eccentric shaft sleeve is provided with a second shaft hole; the main shaft of the crankshaft is arranged in the first shaft hole, and the auxiliary shaft of the crankshaft is arranged in the second shaft hole; one end of the connecting rod is sleeved on the auxiliary shaft of the crankshaft; the crankshaft comprises a main shaft, a balance weight and a secondary shaft which are sequentially connected, a main oil duct is arranged in the main shaft, and a secondary oil duct is arranged in the secondary shaft; the outer wall surface of the main shaft is provided with a first spiral oil groove and a second spiral oil groove which are arranged at intervals along the axial direction of the main shaft in a spiral manner; the main shaft is provided with a first lower oil hole and a second lower oil hole which are communicated with the main oil duct, the first lower oil hole is positioned at one end of the first spiral oil groove, and the second lower oil hole is positioned at one end of the second spiral oil groove; the main shaft still is equipped with the intercommunication the first oilhole of going up of first spiral oil groove, intercommunication the second oilhole of going up of second spiral oil groove, still be equipped with the intercommunication oil duct of intercommunication the first oilhole and the second oilhole of going up in the main shaft, the intercommunication oil duct with the accessory oil duct intercommunication.

The utility model also provides a compressor, which comprises a crankshaft, wherein the crankshaft comprises a main shaft, a balance weight and a secondary shaft which are sequentially connected, a main oil duct is arranged in the main shaft, and a secondary oil duct is arranged in the secondary shaft; the outer wall surface of the main shaft is provided with a first spiral oil groove and a second spiral oil groove which are arranged at intervals along the axial direction of the main shaft in a spiral manner; the main shaft is provided with a first lower oil hole and a second lower oil hole which are communicated with the main oil duct, the first lower oil hole is positioned at one end of the first spiral oil groove, and the second lower oil hole is positioned at one end of the second spiral oil groove; the main shaft still is equipped with the intercommunication the first oilhole of going up of first spiral oil groove, intercommunication the second oilhole of going up of second spiral oil groove, still be equipped with the intercommunication oil duct of intercommunication the first oilhole and the second oilhole of going up in the main shaft, the intercommunication oil duct with the accessory oil duct intercommunication.

The utility model also provides refrigeration equipment, which comprises a compressor, wherein the compressor comprises a crankshaft, the crankshaft comprises a main shaft, a balance block and a secondary shaft which are sequentially connected, a main oil duct is arranged in the main shaft, and a secondary oil duct is arranged in the secondary shaft; the outer wall surface of the main shaft is provided with a first spiral oil groove and a second spiral oil groove which are arranged at intervals along the axial direction of the main shaft in a spiral manner; the main shaft is provided with a first lower oil hole and a second lower oil hole which are communicated with the main oil duct, the first lower oil hole is positioned at one end of the first spiral oil groove, and the second lower oil hole is positioned at one end of the second spiral oil groove; the main shaft still is equipped with the intercommunication the first oilhole of going up of first spiral oil groove, intercommunication the second oilhole of going up of second spiral oil groove, still be equipped with the intercommunication oil duct of intercommunication the first oilhole and the second oilhole of going up in the main shaft, the intercommunication oil duct with the accessory oil duct intercommunication.

According to the technical scheme, the first spiral oil groove and the second spiral oil groove are formed in the main shaft, the first spiral oil groove and the second spiral oil groove are arranged at intervals along the axial direction of the main shaft in a spiral mode, meanwhile, the first lower oil hole is communicated with the first spiral oil groove, the second lower oil hole is communicated with the second spiral oil groove, oil in the main oil duct flows into the first spiral oil groove and the second spiral oil groove through the first lower oil hole and the second lower oil hole respectively, the oil flows to the first upper oil hole and the second upper oil hole in an upward spiral mode along the first spiral oil groove and the second spiral oil groove, and flows into an auxiliary oil duct of the auxiliary shaft through the communicating oil duct, so that lubrication and cooling are carried out on a crankshaft and various moving parts, and friction loss is reduced. Therefore, the number of the downstream holes, the number of the oil grooves and the length of the oil grooves are increased, so that the oil in the main oil duct is effectively pumped to the upper end of the crankshaft, and the oil pumping capacity of the crankshaft is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a crankshaft of the present utility model;

FIG. 2 is another view of the crankshaft of FIG. 1;

FIG. 3 is a further view of the crankshaft of FIG. 1;

FIG. 4 is a cross-sectional view of the crankshaft of FIG. 1;

fig. 5 is another cross-sectional view of the crankshaft of fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Main shaft	120b	Second oil feeding hole
100a	Main oil gallery	130	Communication oil duct
				101	First end	200	Balance weight
102	Second end	200a	Pressure relief hole
				110	First spiral oil groove	300	Auxiliary shaft
110a	First lower oil hole	300a	Auxiliary oil duct
				110b	The first oil feeding hole	300b	Auxiliary oil hole
120	Second spiral oil groove	310	Connecting oil duct
				120a	Second oil down hole

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

The utility model provides a crankshaft.

In the embodiment of the present utility model, referring to fig. 1, 4 to 5, the crankshaft includes a main shaft 100, a balance weight 200 and a secondary shaft 300 sequentially connected, a main oil passage 100a is disposed in the main shaft 100, and a secondary oil passage 300a is disposed in the secondary shaft 300; the outer wall surface of the main shaft 100 is provided with a first spiral oil groove 110 and a second spiral oil groove 120, and the first spiral oil groove 110 and the second spiral oil groove 120 are spirally arranged at intervals along the axial direction of the main shaft 100; the main shaft 100 is provided with a first lower oil hole 110a and a second lower oil hole 120a which are communicated with the main oil duct 100a, the first lower oil hole 110a is positioned at one end of the first spiral oil groove 110, and the second lower oil hole 120a is positioned at one end of the second spiral oil groove 120; referring to fig. 1 and 5, the main shaft 100 is further provided with a first oil feeding hole 110b communicating with the first spiral oil groove 110, and a second oil feeding hole 120b communicating with the second spiral oil groove 120, and a communication oil duct 130 communicating with the first oil feeding hole 110b and the second oil feeding hole 120b is further provided in the main shaft 100, and the communication oil duct 130 communicates with the auxiliary oil duct 300a.

Specifically, the crankshaft is used for a compressor, the compressor is provided with an oil pool, and the crankshaft is communicated with the oil pool. As the crankshaft rotates, oil in the oil sump of the compressor may enter the main oil gallery 100a and then flow in the direction of the main shaft 100 toward the auxiliary shaft 300. It is understood that the crankshaft can be used with centrifugal blades or with a helical oil pump. The compressor may also include other functional components such as a crankcase having an axial bore, the main shaft 100 of the crankshaft being rotatably mounted in the axial bore of the crankcase such that the crankshaft is rotatable relative to one another by a drive means such as a motor.

Referring to fig. 1 and 4, the main shaft 100 extends along the up-down direction, the main shaft 100 has a first end 101 and a second end 102, wherein the first end 101 is located above the second end 102, the first end 101 is connected to the balance weight 200, and the second end 102 can be inserted into an oil pool of the compressor. The main oil gallery 100a formed by the main shaft 100 may be located at the second end 102, where an opening is formed at one end of the main oil gallery 100a, and the open end of the main oil gallery 100a is used as an open end, where the open end is used to communicate with an oil sump of the compressor. When the crankshaft rotates, oil in the compressor oil sump flows along the main oil passage 100a in the direction of the auxiliary shaft 300 by centrifugal force. In an embodiment, the main oil gallery 100a is a channel with a circular cross section, and by forming the circular channel, when the oil flows along the main oil gallery 100a, the resistance of the oil flowing can be effectively reduced, and meanwhile, noise and resistance caused by vortex occurring when the oil flows are avoided.

Referring to fig. 1, 2 and 5, the main shaft 100 is provided with a first lower oil hole 110a and a second lower oil hole 120a that are communicated with the main oil duct 100a, wherein the first lower oil hole 110a and the second lower oil hole 120a are located at the second end 102 of the main shaft 100, and oil in the main oil duct 100a can enter the first lower oil hole 110a and the second lower oil hole 120a respectively under the action of centrifugal force during the rotation of the crankshaft. It is understood that the first and second oil down holes 110a and 120a may be straight holes to reduce resistance when oil flows, and to facilitate perforation. The main shaft 100 may be made of various materials, such as iron or steel.

Referring to fig. 5, the main oil gallery 100a further has a top end far from the open end, the top end of the main oil gallery 100a may be an arc surface or a conical surface, the first lower oil hole 110a and the second lower oil hole 120a penetrate to two sides of the main oil gallery 100a, and oil flows along the main oil gallery 100a toward the top end, and when reaching the top end position, the vortex generated when flowing along the arc surface or the conical surface of the top end is relatively small. The oil flows to the outer wall surface of the main shaft 100 through the first and second oil down holes 110a and 120a and continues to flow to the communication oil passage 130 to deliver the oil to the auxiliary shaft 300.

Referring to fig. 1 to 2, the first spiral oil groove 110 and the second spiral oil groove 120 on the outer wall surface of the main shaft 100 are arranged at intervals, the first spiral oil groove 110 and the second spiral oil groove 120 extend along the axis of the main shaft 100 in a spiral manner, and through the spiral arrangement of the oil grooves, the length of the oil flow path is prolonged, the oil pumping capacity is improved, the lubrication area of the oil grooves can be increased, and the lubrication effect of the outer surface of the main shaft 100 is further improved; and the centrifugal force action of the oil in the oil groove is increased, so that the oil can flow upwards to the upper oil hole along the oil groove. One end of the first spiral oil groove 110 is communicated with the first lower oil hole 110a and spirally extends upwards with the first lower oil hole 110a as a starting point, and similarly, one end of the second spiral oil groove 120 is communicated with the second lower oil hole 120a and spirally extends upwards with the second lower oil hole 120a as a starting point, oil enters the first lower oil hole 110a and the second lower oil hole 120a respectively under the action of centrifugal force and flows along the first spiral oil groove 110 and the second spiral oil groove 120 on the outer surface of the main shaft 100, part of the oil is used for lubricating the outer surface of the main shaft 100, and part of the oil is used for flowing to the upper ends of the first spiral oil groove 110 and the second spiral oil groove 120.

Referring to fig. 1, 2 and 5, the first end 101 of the main shaft 100 is further provided with a first oil feeding hole 110b and a second oil feeding hole 120b, the first oil feeding hole 110b is communicated with the other end of the first spiral oil groove 110, the second oil feeding hole 120b is communicated with the other end of the second spiral oil groove 120, and the oil in the first spiral oil groove 110 and the second spiral oil groove 120 is partially used for lubricating the outer surface of the main shaft 100, and partially enters the auxiliary oil duct 300a of the auxiliary shaft 300 through the first oil feeding hole 110b and the second oil feeding hole 120b, so as to convey the oil to the auxiliary shaft 300.

Referring to fig. 4 to 5, a communication oil passage 130 is disposed in the main shaft 100, and the communication oil passage 130 is respectively connected to the first upper oil hole 110b and the second upper oil hole 120b, and meanwhile, the communication oil passage 130 is also connected to the auxiliary oil passage 300a. Oil enters the communication oil passage 130 from the one and second upper oil holes 120b to input the oil into the sub oil passage 300a. The first and second upper oil holes 110b and 120b may be located at both ends of the communication oil passage 130, i.e., the communication oil passage 130 may be a linear oil passage, thereby reducing resistance when oil flows.

Referring to fig. 1 to 3, one surface of the balance weight 200 is connected to the spindle 100, and may be integrally provided with the spindle 100. The maximum peripheral diameter of the counterweight 200 is greater than the maximum peripheral diameter of the main shaft 100 so that the counterweight 200 can be used to mate with a crankcase (not shown) to limit the crankshaft. The counterweight 200 can also act as a counterweight to the crankshaft assembly to reduce the amplitude and frequency of vibration of the crankshaft after high speed rotation to avoid momentum peaks and thus breakage of the crankshaft.

Referring to fig. 1 and 3, a surface of the balance weight 200 facing away from the main shaft 100 is connected to a secondary shaft 300, and the secondary shaft 300 is eccentrically disposed with respect to the main shaft 100. The auxiliary shaft 300 is used to connect pistons when the auxiliary shaft 300 is installed in a compressor. The fact that the auxiliary shaft 300 is eccentrically disposed with respect to the main shaft 100 means that the axis of the auxiliary shaft 300 and the axis of the main shaft 100 are offset from each other. It will be appreciated that the secondary shaft 300, the counterweight 200 and the primary shaft 100 may be integrally provided. Referring to fig. 1 to 3, an end of the auxiliary oil passage 300a, which is far from the balance weight 200, may penetrate through the top of the auxiliary shaft 300 to output excessive oil to the outside of the crankshaft, so that the oil can enter into circulation.

Since the oil can be transferred to the first lower oil hole 110a and the second lower oil hole 120a along the main oil passage 100a, and flows to the first spiral oil groove 110 and the second spiral oil groove 120 outside the main shaft 100 by using the first lower oil hole 110a and the second lower oil hole 120a, while the oil outside the main shaft 100 can lubricate the outer surface of the main shaft 100, the excessive oil can flow to the auxiliary oil passage 300a through the first upper oil hole 110b, the second upper oil hole 120b and the communication oil passage 130, so as to lubricate the auxiliary shaft 300, thereby effectively reducing friction loss.

According to the technical scheme, the main shaft 100 is provided with the first spiral oil groove 110 and the second spiral oil groove 120, the first spiral oil groove 110 and the second spiral oil groove 120 are arranged at intervals along the axial direction of the main shaft 100 in a spiral mode, meanwhile, the first lower oil hole 110a is communicated with the first spiral oil groove 110, the second lower oil hole 120a is communicated with the second spiral oil groove 120, so that oil in the main oil duct 100a flows into the first spiral oil groove 110 and the second spiral oil groove 120 through the first lower oil hole 110a and the second lower oil hole 120a respectively, the oil flows upwards to the first upper oil hole 110b and the second upper oil hole 120b in a spiral mode along the first spiral oil groove 110 and the second spiral oil groove 120, and flows into the auxiliary oil duct 300a of the auxiliary shaft 300 through the communicating oil duct 130, lubrication and cooling are carried out on a crankshaft and various moving parts, and friction loss is reduced. Thus, by increasing the number of downstream holes, the number of oil grooves, and the length of the oil grooves, oil in the main oil gallery 100a is effectively pumped to the upper end of the crankshaft, thereby improving the oil pumping capacity of the crankshaft.

Referring to fig. 5, in an embodiment, the first lower oil hole 110a and the second lower oil hole 120a are respectively the same distance from the bottom end of the main shaft 100. The first and second oil down holes 110a and 120a have the same height with respect to the bottom end of the main shaft 100, so that oil can simultaneously enter the first and second oil down holes 110a and 120a, respectively, thereby ensuring that the rotation of the crankshaft does not deviate. Also, in order to maintain the balance of the crankshaft, in one embodiment, the first and second oil-up holes 110b and 120b are respectively spaced apart from the bottom end of the main shaft 100 by the same distance.

Further, referring to fig. 5, in an embodiment, the first lower oil hole 110a and the second lower oil hole 120a are symmetrically disposed. The first and second oil down holes 110a and 120a are respectively located at both sides of the main shaft 100 and symmetrically disposed, thereby further securing the rotation balance of the crankshaft. Similarly, referring to fig. 5, in an embodiment, the first oil hole 110b and the second oil hole 120b are symmetrically disposed. It should be noted that, in order to ensure structural strength of the crankshaft, a projection line of the axis of the main shaft 100 and the axis of the auxiliary shaft 300 in the vertical direction is defined as a main line, and projections of the first lower oil hole 110a and the second lower oil hole 120a in the vertical direction do not coincide with the main line, that is, the first lower oil hole 110a and the second lower oil hole 120a are not directly below the auxiliary shaft 300; the projections of the first and second oil-up holes 110b and 120b in the vertical direction are not on the extension line of the main line away from the auxiliary shaft 300.

Referring to fig. 1 to 2, the spiral directions of the first spiral oil groove 110 and the second spiral oil groove 120 are the same. The first spiral oil groove 110 is spirally disposed along a first spiral direction, and the second spiral oil groove 120 is spirally disposed along a second spiral direction, and the first spiral direction and the second spiral direction are the same, so that the first spiral oil groove 110 and the second spiral oil groove 120 can be simultaneously oiled when the crankshaft rotates. The first direction of rotation may be a spiral direction that rises to the right and is the same as the direction of rotation of the crankshaft, i.e., is coincident with the direction of rotation of the crankshaft, such that oil can flow along the crankshaft sump under centrifugal force as the crankshaft rotates.

Referring to fig. 4 to 5, in an embodiment, the auxiliary shaft 300 is provided with a connection oil duct 310 that communicates with the auxiliary oil duct 300a, the connection oil duct 310 penetrates through the balance weight 200 and communicates with the communication oil duct 130, and the connection oil duct 310 is disposed at an included angle with the axis of the main shaft 100.

With continued reference to fig. 4 to 5, one end of the connecting oil passage 310 communicates with the auxiliary oil passage 300a, and the other end communicates with the communicating oil passage 130, so that the oil in the communicating oil passage 130 can flow into the connecting oil passage 310 and then enter the auxiliary oil passage 300a to lubricate and cool the auxiliary shaft 300. Since the axis of the auxiliary shaft 300 is not coincident with the axis of the main shaft 100, in order to ensure the rotation balance of the crankshaft, the connecting oil duct 310 is disposed at an angle to the axis of the main shaft 100, so as to prevent the crankshaft from being biased to one side when the crankshaft rotates.

Referring to fig. 5, in an embodiment, the distance between the connection oil passage 310 and the connection portion of the communication oil passage 130 and the first and second upper oil holes 110b and 120b is the same. That is, the connecting oil passage 310 is formed in the middle of the communicating oil passage 130, the oil enters the communicating oil passage 130 from the first upper oil hole 110b and the second upper oil hole 120b, merges in the middle of the communicating oil passage 130, flows into the connecting oil passage 310, and then enters the auxiliary oil passage 300a of the auxiliary shaft 300, and thus, the oil entering the communicating oil passage 130 from the first upper oil hole 110b and the oil entering the communicating oil passage 130 from the second upper oil hole 120b are communicated with each other by communicating the connecting oil passage 310 with the middle of the communicating oil passage 130, and the oil are subjected to the same stress and can smoothly enter the connecting oil passage 310.

Referring to fig. 2 and 4, in an embodiment, a secondary oil hole 300b communicating with the secondary oil passage 300a is further provided on the peripheral wall of the secondary shaft 300, and the secondary oil hole 300b is coaxially disposed with the connecting oil passage 310. The oil in the main oil passage 100a enters the auxiliary oil passage 300a of the auxiliary shaft 300, flows out through the auxiliary oil hole 300b, and lubricates the outer surface of the auxiliary shaft 300 to reduce friction loss. The auxiliary oil hole 300b may be an inclined hole, and an axis of the auxiliary oil hole 300b coincides with an axis of the connecting oil passage 310, so that the auxiliary oil hole 300b and the connecting oil passage 310 are opened. It should be noted that, the peripheral wall of the auxiliary shaft 300 may be further provided with a plurality of through holes communicating with the auxiliary oil passage 300a, and the through holes may be inclined holes, so that the oil in the auxiliary oil passage 300a may lubricate the outer surface of the auxiliary shaft 300 through the through holes, thereby further reducing friction loss.

Referring to fig. 1 to 2 and fig. 5, in an embodiment, the apertures of the first upper oil hole 110b and the second upper oil hole 120b are the same; and/or, the first and second oil down holes 110a and 120a have the same aperture; and/or, the first upper oil hole 110b and the first lower oil hole 110a have the same aperture; and/or, the apertures of the sub oil hole 300b, the first upper oil hole 110b, and the second upper oil hole 120b are the same.

That is, the first and second upper oil holes 110b and 120b may have the same hole diameters, the first and second lower oil holes 110a and 120a may have the same hole diameters, and the first and second upper oil holes 110b, 120b, 110a, 120a and the auxiliary oil hole 300b may have the same hole diameters.

If the oil hole is too large, the aperture of the open hole is too large, so that the structural strength of the crankshaft is reduced, and the stress and abrasion of the crankshaft are affected; the oil hole is too small, so that the oil oiling effect is achieved. In one embodiment, the aperture of the first upper oil hole 110b and/or the first lower oil hole 110a is 1.5-5.0mm. The first and second upper oil holes 110b and 120b may have a hole diameter of 1.5-5.0mm, and the first and second lower oil holes 110a and 120a may have a hole diameter of 1.5-5.0mm.

In one embodiment, the first spiral oil groove 110 and/or the second spiral oil groove 120 has a groove depth of 0.5-1.0mm and a groove width of 0.1-0.5mm. By defining the groove depth and groove width of the first and/or second spiral oil grooves 110 and 120, structural strength of the crankshaft is ensured while effectively increasing lubrication area of the oil.

Referring to fig. 1 to 4, in an embodiment, the balance weight 200 is provided with a pressure relief hole 200a, and the pressure relief hole 200a penetrates through the balance weight 200 and extends into the main shaft 100 to communicate with the main oil tank. Considering that a small amount of refrigerant is dissolved in the oil, refrigerant gas may be separated out from the oil in the operation process of the compressor, if the refrigerant gas is not discharged, the oil supply system is blocked, so that the problem of oil supply failure or insufficient oil supply occurs, and therefore, in order to ensure the normal oil supply of the oil supply system, the normal operation of the compressor is ensured, the pressure relief hole 200a communicated with the main oil groove can be arranged for exhausting and pressure relief.

In order to verify the oil pumping capacity of the crankshaft of the present application, experiments were conducted using the existing crankshaft (single lower oil hole and single spiral oil groove) as base and the crankshaft of the present application (provided with first lower oil hole, second lower oil hole, first spiral oil groove and second spiral oil groove) as opt, with different frequencies and oil amount changes, and the oil loading amounts were recorded, and the results are shown in tables 1 and 2 below.

Table 1 different frequency changes (oil volume 190 mL)

Table 2 different oil level changes (frequency 19 Hz)

In Table 1, the oil feed amounts of the base crankshaft and opt crankshaft were recorded under different frequency conditions on the basis of the oil feed amounts of 190 mL. As can be seen from table 1, the oil supply amounts of the base crankshaft and the opt crankshaft both increase with an increase in frequency, but the oil supply amount of the opt crankshaft is significantly larger than that of the base crankshaft at the same frequency.

In Table 2, the oil amount was changed based on the frequency of 19Hz, and the oil amounts of the base crankshaft and opt crankshaft were recorded. With the increase of the oil liquid amount, the oil feeding amount of the base crankshaft is not increased much, while the opt crankshaft can be increased from 5.75g/20s to 10.5g/20s, and the oil feeding amount is increased more. As can be seen from Table 2, the oil level of the base crankshaft is only 4.25g/20s when the oil level is 190mL, and the oil level of the opt crankshaft is 5.75g/20s when the oil level is 150mL, i.e., the same oil level is achieved, the oil level required by the opt crankshaft is significantly less than that of the base crankshaft, and the pumping capacity of the opt crankshaft is greater than that of the base crankshaft.

The utility model also provides a crankshaft assembly, which comprises a crankshaft, and the specific structure of the crankshaft refers to the embodiment, and because the crankshaft assembly adopts all the technical schemes of all the embodiments, the crankshaft assembly at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. The crankshaft assembly further comprises a crankcase, an eccentric shaft sleeve and a connecting rod, wherein the crankcase is provided with a first shaft hole; the eccentric shaft sleeve is provided with a second shaft hole; the main shaft 100 of the crankshaft is installed in the first shaft hole, and the auxiliary shaft 300 of the crankshaft is installed in the second shaft hole; one end of the connecting rod is sleeved on the auxiliary shaft 300 of the crankshaft.

The utility model also provides a compressor, which comprises a crankshaft, wherein the specific structure of the crankshaft refers to the embodiment, and because the compressor adopts all the technical schemes of all the embodiments, the compressor at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. Wherein the compressor has an oil pool, and an open end of a main oil gallery 100a of the crankshaft communicates with the oil pool. When the compressor is operated, oil in the oil pool may flow from the main oil gallery 100a to the first and second lower oil holes 110a and 120a, be transferred to the communication oil gallery 130 along the first and second spiral oil grooves 110 and 120, respectively, and then flow into the auxiliary oil gallery 300a of the auxiliary shaft 300, so as to reduce friction loss when the compressor is operated.

The utility model also provides a refrigeration device which comprises a compressor, wherein the specific structure of the compressor refers to the embodiment, and as the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. The refrigerating device can be an electric device with a refrigerating function such as an air conditioner, a refrigerator, a heat pump water heater and the like.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (12)

1. The crankshaft is characterized by comprising a main shaft, a balance weight and a secondary shaft which are sequentially connected, wherein a main oil duct is arranged in the main shaft, and a secondary oil duct is arranged in the secondary shaft;

the outer wall surface of the main shaft is provided with a first spiral oil groove and a second spiral oil groove which are arranged at intervals along the axial direction of the main shaft in a spiral manner; the main shaft is provided with a first lower oil hole and a second lower oil hole which are communicated with the main oil duct, the first lower oil hole is positioned at one end of the first spiral oil groove, and the second lower oil hole is positioned at one end of the second spiral oil groove;

the main shaft still is equipped with the intercommunication the first oilhole of going up of first spiral oil groove, intercommunication the second oilhole of going up of second spiral oil groove, still be equipped with the intercommunication oil duct of intercommunication the first oilhole and the second oilhole of going up in the main shaft, the intercommunication oil duct with the accessory oil duct intercommunication.

2. The crankshaft as claimed in claim 1, wherein the first and second lower oil holes are respectively spaced apart from the bottom end of the main shaft by the same distance.

3. The crankshaft as claimed in claim 2, wherein the first and second oil-up holes are symmetrically provided; and/or the number of the groups of groups,

the first lower oil hole and the second lower oil hole are symmetrically arranged.

4. A crankshaft as claimed in claim 3, wherein the first and second spiral oil grooves have the same spiral direction.

5. A crankshaft according to any one of claims 1 to 4, wherein the auxiliary shaft is provided with a connecting oil passage which communicates with the auxiliary oil passage, the connecting oil passage penetrates through the balance weight and communicates with the communicating oil passage, and the connecting oil passage is disposed at an angle to the axis of the main shaft.

6. The crankshaft as claimed in claim 5, wherein a distance from a connection of the connection oil passage and the communication oil passage to the first and second oil-up holes is the same.

7. The crankshaft according to claim 6, wherein a peripheral wall of the auxiliary shaft is further provided with an auxiliary oil hole that communicates with the auxiliary oil passage, the auxiliary oil hole being disposed coaxially with the connecting oil passage.

8. The crankshaft as claimed in claim 7, wherein the first and second oil-up holes have the same hole diameters; and/or the number of the groups of groups,

the apertures of the first lower oil hole and the second lower oil hole are the same; and/or the number of the groups of groups,

the apertures of the first upper oil hole and the first lower oil hole are the same; and/or the number of the groups of groups,

the apertures of the auxiliary oil hole, the first upper oil hole and the second upper oil hole are the same.

9. A crankshaft according to any one of claims 1 to 4, wherein the aperture of the first upper oil hole and/or the first lower oil hole is 1.5 to 5.0mm; and/or the number of the groups of groups,

the groove depth of the first spiral oil groove and/or the second spiral oil groove is 0.5-1.0mm, and the groove width is 0.1-0.5mm.

10. A crankshaft assembly, comprising

The crankcase is provided with a first shaft hole;

an eccentric shaft sleeve provided with a second shaft hole;

a connecting rod, and the crankshaft according to any one of claims 1 to 9, a main shaft of the crankshaft being mounted in the first shaft hole, and a counter shaft of the crankshaft being mounted in the second shaft hole; one end of the connecting rod is sleeved on the auxiliary shaft of the crankshaft.

11. A compressor comprising a crankshaft as claimed in any one of claims 1 to 9.

12. A refrigeration apparatus comprising the compressor of claim 11.