CN214196667U - Crankshaft, compressor and electric appliance - Google Patents

Abstract

The application discloses a crankshaft, a compressor and an electric appliance, wherein the crankshaft comprises a long shaft, an eccentric part and a short shaft, and an oil pumping mechanism is further arranged in the short shaft; an inner oil way is formed in the eccentric part, an oil outlet of the inner oil way is formed outside the eccentric part, and an oil inlet of the inner oil way is communicated with the oil pumping mechanism; the outer oil groove is communicated with an oil outlet of the inner oil way, and the oil pumping mechanism supplies oil to a friction pair of the crankshaft through the inner oil way and the outer oil groove. The utility model discloses, all arrange interior oil circuit and outer oil groove on the eccentric portion, avoided directly offering the oilhole on major axis and minor axis, improved the hollow structure of traditional bent axle, reduced the quantity of oil outlet, effectively improved the intensity of bent axle, reduced risks such as deformation, disconnected axle, improve the reliability of compressor; the outer oil groove on the eccentric part can respectively supply oil to the long shaft direction and the short shaft direction, and the smoothness of the whole oil supply is effectively kept.

Description

Crankshaft, compressor and electric appliance

Technical Field

The present application relates generally to compressors and, more particularly, to crankshafts, compressors, and appliances.

Background

The compressor is a driven fluid machine for lifting low-pressure gas into high-pressure gas, and is divided into various types according to the structure, wherein the compressor is a rolling rotor type compressor, a crankshaft is in interference connection with a motor rotor to form a compressor driving part, the crankshaft compresses a refrigerant in a cylinder under the driving of a motor, and the compressed refrigerant enters a silencer and then enters a space between the silencer and the motor. The long shaft and the short shaft are formed on two sides of the eccentric part of the crankshaft, the long shaft and the upper flange, the short shaft and the lower flange, and the eccentric part and the roller form friction pairs respectively, and in order to ensure the reliable operation of the compressor, the friction pairs are fully lubricated and cooled.

The oil circuit is usually arranged on the crankshaft, limited by the compressor structure. The existing oil circuit structure is provided with a central shaft hole along the axial direction of the crankshaft, and the crankshaft is in a hollow shaft structure basically because the crankshaft needs to lubricate and cool various parts on the upper side and the lower side, and the central shaft hole is used for conveying cooling oil and generally reaches more than half of the length of the crankshaft. And, still can set up a plurality of oil outlet according to lubricated and the requirement of producing oil, guarantee lubricated oil output enough. The structure of the crankshaft is generally provided with an eccentric part or a balance block, the end surfaces of the eccentric part and the balance block are assembly surfaces matched with other parts, and therefore oil outlet holes or oil storage tanks are generally arranged on the upper side and the lower side of the assembly surfaces of the eccentric part and the balance block so as to ensure the lubricating and cooling efficiency. However, the oil path structure has the following defects in use: the crankshaft has a long shaft and a short shaft, oil holes are usually formed in the root portions of the long shaft and the short shaft or the assembly surfaces of the eccentric portion and the balance block, and meanwhile, the crankshaft is of a hollow structure, so that the strength of the crankshaft is severely limited, the risk of shaft breakage and the like exists, and the reliability of the crankshaft is reduced.

In view of this, it is necessary to improve the structure of the conventional compressor and the oil circuit mechanism thereof, so as to improve the strength of the crankshaft on the basis of ensuring the lubrication and cooling of each friction pair.

SUMMERY OF THE UTILITY MODEL

One of the main objectives of the present application is to overcome the above-mentioned disadvantage of the compressor of the prior art that the reliability of the crankshaft is low, and to improve the strength of the crankshaft of the compressor, and to provide a crankshaft, which includes a long shaft, an eccentric portion and a short shaft, and an oil pumping mechanism is further disposed in the short shaft; an inner oil way is formed in the eccentric part, an oil outlet of the inner oil way is formed outside the eccentric part, and an oil inlet of the inner oil way is communicated with the oil pumping mechanism; the outer oil groove is communicated with an oil outlet of the inner oil way, and the oil pumping mechanism supplies oil to each friction pair of the crankshaft through the inner oil way and the outer oil groove.

According to an embodiment of the present invention, the long shaft is a solid shaft structure.

According to the utility model discloses an embodiment, outer oil groove sets up the outer peripheral face of eccentric portion, outer oil groove both ends respectively to the major axis with the minor axis direction is open.

According to the utility model discloses an embodiment, the degree of depth of outer oil groove at the middle part is greater than the degree of depth of both sides, the export of interior oil circuit is seted up the middle part of outer oil groove.

According to the utility model discloses an embodiment, interior oil circuit includes first oilhole and second oilhole, first oilhole intercommunication outer oil groove, the second oilhole intercommunication extremely the eccentric portion towards the terminal surface of major axis side.

Further, in the above embodiment, the first oil hole is provided at the short diameter of the eccentric portion, and the second oil hole is provided at the long diameter of the eccentric portion.

Or, further, in the above embodiment, the second oil hole includes a radial hole and an axial hole that communicate in this order, the radial hole communicating with the oil pumping mechanism, and an opening of the axial hole being provided at an end surface of the eccentric portion.

According to the utility model discloses an embodiment, the major axis root forms first oil storage tank, the root of minor axis forms the second oil storage tank, the both ends of outer oil groove respectively with first oil storage tank and second oil storage tank intercommunication.

The utility model also discloses a compressor, including the bent axle of above-mentioned structure.

According to the utility model discloses an embodiment still includes drive assembly and pump body subassembly, pump body subassembly includes:

the crankshaft is fixed with a rotor of the driving assembly, and the eccentric part and a roller in the cylinder form an eccentric part friction pair;

the flange assembly comprises an upper flange and a lower flange which are respectively arranged on two sides of the eccentric part, a long shaft friction pair is formed between the upper flange and the long shaft, a short shaft friction pair is formed between the lower flange and the short shaft, and a silencer is sleeved on a shaft neck of the upper flange and tightly pressed on an installation surface of the upper flange.

According to the utility model discloses an embodiment, go up the flange with the major axis root corresponds and forms first oil storage chamber, the lower flange with the minor axis root corresponds and forms second oil storage chamber, the inner wall of axle journal is equipped with the helicla flute, the helicla flute with first oil storage chamber or outer oil groove intercommunication.

Further, in the above embodiment, an oil collecting groove is provided on the upper end surface of the upper flange around the journal, the upper flange is provided with an air outlet, and an inlet of the air outlet is communicated with the first oil storage cavity or the spiral groove;

the outlet of the air outlet is arranged in the oil collecting tank, or

The outlet of the air outlet hole is arranged on the outer wall of the shaft neck, or

The outlet of the air outlet hole is formed in the mounting surface.

Furthermore, in the above embodiment, an oil guide groove is provided on the mounting surface, one end of the oil guide groove communicates with the outlet of the air outlet, and the other end of the oil guide groove leads to the back pressure cavity of the compressor.

Still further, in the above embodiment, the outlet of the oil guide groove is inclined downward along the radial direction of the upper flange, and forms an included angle of 0-5 ° with the mounting surface.

Or, in the above embodiment, the first oil reservoir chamber is formed in a root portion of the outer peripheral surface of the long shaft, or is formed by forming grooves in the outer peripheral surface of the upper flange and the outer wall of the long shaft; the second oil storage cavity is formed in the root of the outer peripheral surface of the short shaft, or formed by grooves formed in the outer peripheral surface of the lower flange and the outer wall of the short shaft respectively.

The utility model also discloses an electrical apparatus, compressor including above-mentioned structure.

According to the technical scheme, the method has the advantages that: the inner oil way and the outer oil groove are arranged on the eccentric part, so that oil holes are prevented from being directly formed in the long shaft and the short shaft, the eccentric part has larger structural strength due to the fact that the eccentric part has larger diameter than the long shaft and the short shaft, and has stronger bending resistance and torsion resistance, the inner oil way and the outer oil groove which need to be perforated are arranged on the eccentric part, the strength difference of each section of the crankshaft can be reduced, and the overall strength of the crankshaft is improved; the inner oil path is arranged in the eccentric part, so that the hollow length in the crankshaft is greatly shortened, the strength of the crankshaft is enhanced from the inside, the crankshaft is not easy to deform and damage, the processing technology is improved, and the processing cost is reduced; the utility model discloses improve the hollow structure of traditional bent axle, reduced the quantity of oil outlet, effectively improved the intensity of bent axle, reduced risks such as deformation, disconnected axle. And the outer oil groove on the eccentric part can respectively supply oil to the long shaft direction and the short shaft direction, and the eccentric part has larger outer diameter, so that the oil supply of the outer oil groove on the eccentric part can be respectively carried out to two sides, the obstruction of the eccentric part is not needed to be worried about, and the smoothness of the whole oil supply is effectively kept.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.

FIG. 1 is a schematic illustration of a crankshaft according to an exemplary embodiment.

FIG. 2 is a cross-sectional view of a crankshaft shown in accordance with an exemplary embodiment.

FIG. 3 is a cross-sectional view of a pump body assembly of the compressor shown according to an exemplary embodiment.

FIG. 4 is a cooling oil flow schematic of a pump block assembly of a compressor shown according to an exemplary embodiment.

Fig. 5 is a schematic structural view illustrating an upper flange of a compressor according to an exemplary embodiment.

FIG. 6 is a cross-sectional view of an upper flange of a compressor shown according to an exemplary embodiment.

FIG. 7 is a cross-sectional view of a crankshaft shown in accordance with an exemplary embodiment.

FIG. 8 is a cross-sectional view of a crankshaft shown in accordance with an exemplary embodiment.

Wherein the reference numerals are as follows:

the oil sump 100, the crankshaft 10, the long shaft 11, the eccentric part 12, the short shaft 13, the central oil hole 21, the oil guide plate 22, the outer oil groove 30, the first oil hole 31, the second oil hole 32, the radial hole 321, the axial hole 322, the cylinder 40, the roller 41, the upper flange 51, the mounting surface 510, the air outlet hole 511, the oil guide groove 512, the oil collecting groove 513, the journal 514, the lower flange 52, the first oil storage chamber 61, the second oil storage chamber 62, the muffler 70 and the back pressure chamber 80.

In fig. 4, the direction of the solid-line arrow is the flow direction of the cooling oil, and the direction of the broken-line arrow is the flow direction of the gaseous oil.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In order to overcome the problem of low strength of the crankshaft in the prior art, as shown in fig. 1 and 2, the utility model discloses a crankshaft 10, which comprises a long shaft 11, an eccentric part 12 and a short shaft 13, wherein an oil pumping mechanism is arranged in the short shaft 13; an inner oil path is formed in the eccentric part 12, an oil outlet of the inner oil path is formed outside the eccentric part 12, and an oil inlet of the inner oil path is communicated with an oil pumping mechanism; the outer oil groove 30 is communicated with an oil outlet of the inner oil path, and the oil pumping mechanism supplies oil to each friction pair of the crankshaft 10 through the inner oil path and the outer oil groove 30.

The technical scheme of the utility model, on the eccentric portion 12 is all arranged in with interior oil circuit and outer oil groove 30, avoided directly offering the oilhole on major axis 11 and minor axis 13, eccentric portion 12 has bigger structural strength because of having than major axis 11, minor axis 13 bigger diameter, possesses stronger bending resistance and antitorque property, consequently the interior oil circuit that will need the trompil all sets up on eccentric portion 12 with outer oil groove 30, can reduce the intensity gap of bent axle 10 each section, improve bent axle 10's bulk strength. And the inner oil path is arranged in the eccentric part 12, so that the hollow length inside the crankshaft 10 is further shortened, the strength of the crankshaft 10 is enhanced from the inside, and the crankshaft is not easy to deform and damage. To sum up, the utility model discloses improve the hollow structure of traditional bent axle 10, reduced the quantity of oil outlet, effectively improved bent axle 10's intensity, reduced risks such as deformation, disconnected axle, improved the reliability of compressor. The utility model discloses a scheme especially more is applicable to the minor axis footpath bent axle, when realizing the low friction consumption, guarantees that each friction pair is fully lubricated, guarantees bent axle 10 intensity, improves the compressor reliability.

Because the periphery of major axis 11 section corresponds and is equipped with more parts such as muffler 70, motor etc. consequently in order to guarantee the abundant lubrication and the cooling of bent axle 10 top part, interior oil circuit and outer oil groove 30 all can be to major axis 11 oil supply, and relatively, the oil supply of minor axis 13 can be sufficient supply through outer oil groove 30, and the setting of interior oil circuit and outer oil groove 30 can realize accurate oil supply, reduces the waste and the invalid circulation of oil, reduces energy loss. The outer oil groove 30 on the eccentric part 12 can supply oil to the major axis and minor axis directions respectively, and the eccentric part 12 has a larger outer diameter, so that the oil supply of the outer oil groove 30 on the eccentric part can be carried out to two sides respectively, and the obstruction of the eccentric part 12 is not needed to be worried about, thereby effectively keeping the smoothness of the whole oil supply.

The utility model discloses well bent axle 10 does not set up the oil outlet in the position beyond eccentric portion 12, can reduce the compressor and spit the oily rate under the middle and high frequency operation, avoids causing the oil bath liquid level unstability, influences the compressor reliability; and on the other hand can also avoid too much refrigeration oil to get into condenser and evaporimeter, influence two wares heat transfer, guarantee the wholeness ability of electrical apparatus such as air conditioner.

Specifically, as shown in fig. 3 and 4, the oil pumping mechanism includes a central oil hole 21 provided on the stub shaft 13 and an oil guide plate 22 provided in the central oil hole 21, and the oil guide plate 22 is used to pump oil from the oil sump 100 into the central oil hole 21 with the rotation of the crankshaft 10 by its own structure.

According to an embodiment of the present invention, the long shaft 11 is a solid shaft structure. Since the area of the matching surface between the long shaft 11 and other components is larger, and the influence of the strength on the strength and the assembly precision of the overall structure is larger, in the embodiment, the long shaft 11 is provided with a solid shaft structure, so that the strength of the long shaft 11 is enhanced, and the performance and the matching precision of the overall structure are improved.

As shown in fig. 2, according to an embodiment of the present invention, the outer oil groove 30 is disposed on the outer circumferential surface of the eccentric portion 12, and both ends of the outer oil groove 30 are opened in the directions of the major axis 11 and the minor axis 13, respectively. The outer oil groove 30 is used for supplying oil to the eccentric part friction pair, the short shaft friction pair and the long shaft friction pair on two sides to realize cooling and lubrication, in the embodiment, the outer oil groove 30 is arranged on the outer peripheral surface of the eccentric part 12, the structure is simple and easy to process, and along with the rotation of the crankshaft 10, oil enters the outer oil groove 30 and the eccentric part friction pair from the inner oil path under the action of centrifugal force and enters the short shaft friction pair and the long shaft friction pair.

Further, in the above embodiment, the depth of the outer oil groove 30 is greater at the middle than at both sides, and the outlet of the inner oil passage is opened at the middle of the outer oil groove 30. After the oil enters the inner oil path, the centrifugal force applied to the oil is along the radial direction of the crankshaft 10 or the eccentric part 12, so that the outer oil groove 30 is set to the structure in the embodiment, so that the oil is allowed to have a certain radial speed, and the energy internal consumption is reduced; and because the oil flow velocity is the biggest at the exit position, consequently the exit has more degree of depth and space, can also alleviate the oil pressure to a certain extent.

Specifically, the outer oil groove 30 is provided in the axial direction of the eccentric portion 12. The axial direction is the shortest distance that the outer oil groove 30 can communicate with the major axis friction pair and the minor axis friction pair at the two ends, so that the strength influence on the eccentric part 12 can be reduced to the greatest extent, and the processing is convenient.

According to the utility model discloses an embodiment, interior oil circuit includes first oilhole 31 and second oilhole 32, and first oilhole 31 communicates outer oil groove 30, and second oilhole 32 communicates to the terminal surface that eccentric portion 12 is close to major axis 11. In this embodiment, the first oil hole 31 is used for supplying oil to the eccentric portion friction pair, the long axis friction pair, and the short axis friction pair, while the second oil hole 32 and the outer oil groove 30 are used for supplying oil to the long axis friction pair, so that the function of the inner oil path is cooperatively realized through the first oil hole 31 and the second oil hole 32, which is beneficial to realizing accurate oil supply.

Further, in the above embodiment, the first oil hole 31 is provided at the short diameter of the eccentric portion 12, and the second oil hole 32 is provided at the long diameter of the eccentric portion 12. In the present embodiment, the first oil hole 31 and the outer oil groove 30 communicating therewith are provided in the short diameter portion, the outer oil groove 30 needs to penetrate the outer circumferential surface of the eccentric portion 12, the length of the first oil hole 31 and the overall depth of the outer oil groove 30 are reduced, and the influence on the strength of the eccentric portion 12 can be reduced, and the second oil hole 32 is provided in the long diameter portion in order to balance the oil pressure, and the influence on the strength of the eccentric portion 12 can be reduced as much as possible.

Alternatively, further, in the above embodiment, the second oil hole 32 includes the radial hole 321 and the axial hole 322 that communicate in this order, the radial hole 321 communicates with the oil pumping mechanism, and the opening of the axial hole 322 is provided at the end surface of the eccentric portion 12. In the present embodiment, the radial hole 321 reduces the loss of the outflow speed of the oil, and the axial hole 322 can guide the oil upward. Specifically, the axial hole 322 may be a blind hole that guides the cooling oil in one direction.

Specifically, the first oil hole 31 and the radial hole 321 are symmetrically disposed about the central axis of the oil supply passage. And the first oil hole 31 and the second oil hole 32 can balance oil pressure. The first oil hole 31 and the radial hole 321 are symmetrically arranged, so that the first oil hole 31 and the radial hole 321 can be machined by one process such as drilling during machining, the process is reduced, and the machining is convenient.

According to the utility model discloses an embodiment, the major axis 11 root forms first oil storage tank, and the minor axis 13 root forms the second oil storage tank, and the both ends of outer oil groove 30 communicate with first oil storage tank, second oil storage tank respectively. In this embodiment, the first oil storage tank and the second oil storage tank are respectively used for supplying oil to the long-axis friction pair and the short-axis friction pair, so as to realize a temporary oil storage function and avoid damages such as sintering of the crankshaft 10 caused by a small amount of oil and incapability of meeting the requirements of cooling and lubrication during operation.

In the embodiment shown in fig. 7, the long shaft 11 is provided with a long shaft oil hole 110, a long shaft base oil hole 111, a long shaft side oil hole 112 at the inner end, and a short shaft base oil hole 131 at the position where the short shaft 13 contacts the eccentric portion 12. As shown in fig. 8, the long axis oil hole 110 extends to the end of the long axis 11, and a long axis root oil hole 111 and a short axis root oil hole 131 are also provided. In these two embodiments, the long-axis oil hole 110 increases the cavity of the crankshaft 10, which is not beneficial to improving the overall rigidity of the crankshaft, and the oil hole is formed at the root of the long axis or the short axis, which reduces the rigidity of the crankshaft and is not beneficial to improving the reliability. Therefore, the utility model discloses shorten the inside oilhole length of bent axle, reduced the cavity volume, avoid the root trompil of major axis, minor axis, effectively guarantee the intensity of bent axle through dual means, improve the reliability.

As shown in fig. 3 and 4, the present invention also discloses a compressor, which includes the crankshaft 10 with the above structure.

In an embodiment of the present invention, the compressor further includes a driving assembly and a pump body assembly, and the pump body assembly includes the crankshaft 10 and the flange assembly of the above structure. The crankshaft 10 is fixed to the rotor of the drive assembly and the eccentric 12 and the roller 41 in the cylinder 40 form an eccentric friction pair. The flange assembly comprises an upper flange 51 and a lower flange 52 which are respectively arranged at two sides of the eccentric part 12, a long shaft friction pair is formed between the upper flange 51 and the long shaft 11, a short shaft friction pair is formed between the lower flange 52 and the short shaft 13, and the silencer 70 is sleeved on a shaft neck 514 of the upper flange 51 and is pressed on a mounting surface 510 of the upper flange 51.

The utility model discloses, the vice roller 41 that is in eccentric portion 12 and the cylinder 40 of eccentric portion friction forms, and bent axle 10 extrudees the operating condition who changes cylinder 40 through eccentric portion 12 roller 41 in to cylinder 40 at the rotation in-process, and it is vice that upper flange 51 and lower flange 52 form major axis friction respectively, minor axis friction is vice, guarantees that bent axle 10 rotates the in-process and realizes the pump oil to enter into the target area with oil along bent axle 10's oil circuit mechanism.

According to the utility model discloses an embodiment, go up flange 51 and major axis 11 root and correspond and form first oil storage chamber 61, lower flange 52 and minor axis 13 root correspond and form second oil storage chamber 62, and the inner wall of axle journal 514 is equipped with helicla flute 515, and helicla flute 515 communicates with first oil storage chamber 61 or outer oil groove 30. In the present embodiment, the spiral groove 515 is provided at the journal 514 of the upper flange 51, and the cooling oil enters the spiral groove 515 and ascends along the spiral groove 515 to lubricate the main bearing of the long-axis friction pair under the rotation of the crankshaft 10, and may directly communicate with one end of the long axis 11 communicated with the external oil groove 30, or may communicate with the first oil storage chamber 61 at the root of the long axis 11, so as to facilitate the oil in the first oil storage chamber 61 to be delivered to each part of the long-axis friction pair, and improve the lubrication and cooling efficiency.

As shown in fig. 4 to 6, further, in the above embodiment, the upper end surface of the upper flange 51 is provided with the oil collecting groove 513 around the journal 514, the upper flange 51 is provided with the air outlet 511, and the inlet of the air outlet 511 is communicated with the first oil storage chamber 61 or the spiral groove 515; the outlet of the air outlet 511 is arranged in the oil collecting groove 513, or the outlet of the air outlet 511 is arranged on the outer wall of the journal 514, or the outlet of the air outlet 511 is arranged on the mounting surface 510.

In actual operation, because the cooling oil is in contact with each friction pair, the heat of the friction pair can make the cooling oil partially precipitate to form a gas state, and therefore, the air outlet 511 is arranged at the position of the upper flange 51, so that the mixture of the gas oil and the liquid oil can be led out upwards. The major axis friction pair extends a greater length and is loaded more, and the first oil chamber 61 or the spiral groove 515 may be provided with an inlet of the air outlet 511, and an outlet of the air outlet is provided at a position after heat exchange, such as the oil collecting tank 513, the outer wall of the journal 514 or the mounting surface 510. Because the diameter of the air outlet 511 is smaller, for example, the diameter can be set to be 0.5 mm-1.5 mm, the oil flow resistance is large, the amount of the frozen oil flowing out through the air outlet 511 is small, the frozen oil flowing out of the air outlet 511 is mixed with the frozen oil gathered by the oil collecting tank 513 and flows out through the oil guide tank 512 to enter the back pressure cavity 80, because the flowing-out frozen oil is a continuous flow, the influence of the airflow in the back pressure cavity 80 on the frozen oil is small, and the part of the frozen oil flows into the oil pool 100 under the action of gravity, so that the oil-spitting rate of the compressor is effectively reduced.

Specifically, venthole 511 slope setting, the slope setting can be according to entry and exit position, then direct drilling intercommunication is favorable to the gas-liquid mixture to derive fast.

Furthermore, in the above embodiment, the mounting surface 510 is provided with an oil guide groove 512, one end of the oil guide groove 512 is communicated with the outlet of the air outlet 511, and the other end is opened to the back pressure chamber 80 of the compressor. In this embodiment, set up on installation face 510 and lead oil groove 512, derive the back pressure chamber 80 of compressor with the gas-liquid mixture, wherein gas rises and gets into back pressure chamber 80, returns oil bath 100 along the inner wall regression liquid state of back pressure chamber 80 after the cooling, and liquid oil directly gets back to oil bath 100, leads oil groove 512 and can improve the guide ability and the whole circulation efficiency of oil.

Still further, the outlet of the oil guide groove 512 is inclined downwards along the radial direction of the upper flange 51, and forms an alpha included angle of 0-5 degrees with the mounting surface 510. In this embodiment, along with the derivation of gas-liquid mixture, lead the downward sloping of oil groove 512, the degree of depth increases, can effectively improve and lead oily effect, avoids gas-liquid mixture's backward flow.

According to an embodiment of the present invention, the first oil storage chamber 61 is formed at the root of the outer peripheral surface of the long shaft 11, or at the inner end of the upper flange 51, or formed by forming grooves on the outer peripheral surface of the upper flange 51 and the outer wall of the long shaft 11, respectively; the second oil reservoir 62 is formed at the root of the outer peripheral surface of the stub shaft 13, at the inner end of the lower flange 52, or by forming grooves in the outer peripheral surface of the lower flange 52 and the outer wall of the stub shaft 13. In the present embodiment, the first oil reservoir 61 and the second oil reservoir 62 are provided separately on the major axis 11 and the minor axis 13 of the crankshaft 10 as needed, may be provided separately on the upper flange 51 and the lower flange 52, or may be formed together with the upper flange 51 and the lower flange 52, and the processing method is not limited and may be flexibly provided as needed.

The utility model also discloses an electrical apparatus, compressor including above-mentioned structure. Such appliances include, but are not limited to, refrigerators, air conditioners, and other appliances requiring refrigeration. The compressor with the structure is applied to the electrical appliances, so that the service life can be effectively prolonged, the loss of the compressor is reduced, and the energy is saved.

The utility model also discloses an oil supply method of compressor utilizes the bent axle 10 of above-mentioned structure to realize, including following step:

oil is pumped at the short shaft 13 of the crankshaft 10 by a built-in oil pumping mechanism;

the oil is supplied to the friction pair along an inner oil path provided in the eccentric portion 12 of the crankshaft 10;

each friction pair is supplied with oil in a balanced manner through an outer oil groove 30 formed outside the eccentric portion 12 of the crankshaft 10.

The utility model discloses an oil supply method utilizes pump oil mechanism to supply oil through the inside oil circuit of eccentric portion 12, outside oil groove 30, and the fuel feeding route is simple, can reduce oil yield, effectively reduces the energy loss to can realize the vice accurate fuel feeding of each friction.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (16)

1. A crankshaft (10) comprises a long shaft (11), an eccentric part (12) and a short shaft (13), and is characterized in that an oil pumping mechanism is further arranged in the short shaft (13); an inner oil way is formed in the eccentric part (12), an oil outlet of the inner oil way is formed outside the eccentric part (12), and an oil inlet of the inner oil way is communicated with the oil pumping mechanism; the outer oil groove (30) is communicated with an oil outlet of the inner oil way, and the oil pumping mechanism supplies oil to each friction pair of the crankshaft (10) through the inner oil way and the outer oil groove (30).

2. A crankshaft (10) according to claim 1, characterized in that the long shaft (11) is of solid shaft construction.

3. The crankshaft (10) according to claim 1, wherein the outer oil groove (30) is provided on an outer peripheral surface of the eccentric portion (12), and both ends of the outer oil groove (30) are opened in the directions of the major axis (11) and the minor axis (13), respectively.

4. A crankshaft (10) according to claim 3, characterized in that the depth of the outer oil groove (30) is greater in the middle than on both sides, and the outlet of the inner oil channel opens in the middle of the outer oil groove (30).

5. A crankshaft (10) according to claim 1, wherein said inner oil passage comprises a first oil hole (31) and a second oil hole (32), said first oil hole (31) communicating with said outer oil groove (30), said second oil hole (32) communicating to an end surface of said eccentric portion (12) facing said major axis (11) side.

6. The crankshaft (10) of claim 5, wherein the first oil hole (31) is provided at a short diameter of the eccentric portion (12), and the second oil hole (32) is provided at a long diameter of the eccentric portion (12).

7. A crankshaft (10) according to claim 5, characterized in that the second oil hole (32) comprises a radial hole (321) and an axial hole (322) communicating in sequence, the radial hole (321) communicating with the oil pumping mechanism, and the opening of the axial hole (322) being provided at the end face of the eccentric portion (12).

8. A crankshaft (10) according to any of claims 1 to 7, wherein the root of the long shaft (11) forms a first oil reservoir and the root of the short shaft (13) forms a second oil reservoir, and both ends of the outer oil groove (30) are respectively communicated with the first oil reservoir and the second oil reservoir.

9. A compressor, characterized by comprising a crankshaft (10) according to any one of claims 1 to 8.

10. The compressor of claim 9, further comprising a drive assembly and a pump body assembly, the pump body assembly comprising:

the crankshaft (10) is fixed with a rotor of the driving assembly, and the eccentric part (12) and a roller (41) in a cylinder (40) form an eccentric part friction pair;

the flange assembly comprises an upper flange (51) and a lower flange (52) which are respectively arranged on two sides of the eccentric part (12), a long shaft friction pair is formed between the upper flange (51) and the long shaft (11), a short shaft friction pair is formed between the lower flange (52) and the short shaft (13), and a silencer (70) is sleeved on a shaft neck (514) of the upper flange (51) and pressed on a mounting surface (510) of the upper flange (51).

11. The compressor as claimed in claim 10, wherein the upper flange (51) and the root of the major axis (11) form a first oil chamber (61) correspondingly, the lower flange (52) and the root of the minor axis (13) form a second oil chamber (62) correspondingly, the inner wall of the journal (514) is provided with a spiral groove (515), and the spiral groove (515) is communicated with the first oil chamber (61) or the outer oil groove (30).

12. The compressor according to claim 11, wherein an upper end face of the upper flange (51) is provided with an oil sump (513) around the journal (514), the upper flange (51) is provided with an air outlet hole (511), and an inlet of the air outlet hole (511) communicates with the first oil storage chamber (61) or the spiral groove (515);

the outlet of the air outlet (511) is arranged in the oil collecting tank (513), or

The outlet of the air outlet hole (511) is arranged on the outer wall of the journal (514), or

The outlet of the air outlet hole (511) is arranged on the mounting surface (510).

13. The compressor as claimed in claim 12, wherein an oil guide groove (512) is provided on the mounting surface (510), one end of the oil guide groove (512) is communicated with the outlet of the air outlet hole (511), and the other end is opened to a back pressure chamber (80) of the compressor.

14. The compressor of claim 13, wherein an outlet of the oil guide groove (512) is inclined downward in a radial direction of the upper flange (51) to form an angle of 0 to 5 ° with the mounting surface (510).

15. The compressor of claim 11, wherein the first oil reservoir chamber (61) is formed at a root portion of an outer circumferential surface of the long shaft (11), or at an inner end of the upper flange (51), or is formed by a groove formed in each of an outer circumferential surface of the upper flange (51) and an outer wall of the long shaft (11); the second oil storage cavity (62) is formed in the root of the outer peripheral surface of the short shaft (13), or in the inner end of the lower flange (52), or formed by grooves formed in the outer peripheral surface of the lower flange (52) and the outer wall of the short shaft (13) respectively.

16. An electrical appliance comprising a compressor as claimed in any one of claims 9 to 15.

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