CN110873055A - Thrust structure of compressor, rotary compressor and refrigeration equipment having the same - Google Patents

Abstract

The invention discloses a thrust structure of a compressor, a rotary compressor with the thrust structure and refrigeration equipment, wherein the thrust structure comprises: the motor bearing is suitable for being connected with a shell of the compressor and is provided with a crankshaft mounting hole; the crankshaft is arranged in the crankshaft mounting hole in a penetrating mode, the upper portion of the crankshaft is provided with a thrust portion protruding outwards, and the thrust portion is a thrust shaft sleeve sleeved on the crankshaft or a fastener connected with the crankshaft; the plane thrust bearing is sleeved on the crankshaft and comprises a lower supporting sheet abutted against the motor bearing, an upper supporting sheet abutted against the thrust part, and a rolling body and a retainer which are arranged between the lower supporting sheet and the upper supporting sheet and are connected with each other. The abrasion of the thrust structure of the compressor can be improved, and the energy efficiency of the compressor can be improved.

Description

Thrust structure of compressor, rotary compressor and refrigeration equipment having the same

technical field

The invention relates to the technical field of refrigeration, in particular to a thrust structure of a compressor, a rotary compressor and refrigeration equipment having the same.

Background technique

In the related art, there are two types of structures for supporting the rotation of the crankshaft and rotor components in the compressor. One is the eccentric thrust surface thrust of the crankshaft, that is, the eccentric thrust surface abuts against the end face of the lower bearing to form a thrust, commonly known as the shoulder thrust; On the thrust washer on the lower bearing, commonly known as the shaft end thrust. The above two structures are often prone to wear problems at the thrust structure.

SUMMARY OF THE INVENTION

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present invention is to provide a thrust structure for a compressor, the wear of the thrust structure can be improved, and the energy efficiency of the compressor can be improved.

The present invention also provides a rotary compressor with the above thrust structure.

The present invention also provides a refrigeration device with the above thrust structure.

The thrust structure of the compressor according to the embodiment of the first aspect of the present invention includes: a motor bearing adapted to be connected with the casing of the compressor, the motor bearing is provided with a crankshaft mounting hole; a crankshaft, the crankshaft is penetrated in the In the crankshaft installation hole, the upper part of the crankshaft is provided with a thrust portion protruding outward, and the thrust portion is a thrust sleeve sleeved on the crankshaft or a fastener connected with the crankshaft ; Plane thrust bearing, the plane thrust bearing is sleeved on the crankshaft and includes a lower support piece that abuts against the motor bearing, an upper support piece that abuts against the thrust portion, and is provided on the lower support piece and The rolling bodies and the cages are connected to each other between the upper support sheets.

The wear of the thrust structure of the compressor according to the embodiment of the present invention can be improved, which is beneficial to improve the energy efficiency of the compressor.

In addition, the thrust structure of the compressor according to the above embodiments of the present invention may also have the following additional technical features:

Optionally, the thrust sleeve is in an interference fit with the crankshaft.

According to some embodiments of the present invention, one end of the crankshaft is provided with a threaded hole, the fastener has a threaded rod and a thrust end provided on one end of the threaded rod, the threaded rod is inserted into the In the threaded hole, the thrust end abuts against the upper support piece.

Optionally, the motor bearing is provided with an oil storage tank that communicates with the crankshaft mounting hole, the plane thrust bearing is provided in the oil storage tank, and the oil storage tank is provided with an oil storage tank for supporting the lower support piece. a support table, the support table protrudes from the inner wall surface of the oil storage tank.

Further, the oil storage tank is also provided with a limit surface connected to the outer edge of the support table, located on the radial outer side of the lower support sheet and extending along the circumferential direction of the motor bearing. The outer diameter D1 of the lower supporting piece and the diameter D2 of the circle where the limiting surface is located satisfy the relational expression: D2- D1≤2mm.

Optionally, the peripheral wall of the oil storage tank is provided with at least one oil balance hole penetrating the outer wall surface and the inner wall surface thereof.

According to some embodiments of the present invention, the radial dimension d2 of the oil balance hole satisfies: 0.5mm≤d2≤10mm.

Optionally, the edge height H1 of the oil balance hole, the thickness H2 of the lower support sheet, and the diameter d1 of the rolling element satisfy the relational formula: 0mm≤H1-H2≤0.5×d1.

In some embodiments of the present invention, an oil receiving groove is further provided on the motor bearing, and the oil receiving groove includes: a first groove arranged around the oil storage groove; a second groove, the second groove along the The radial extension of the motor bearing and the outer end communicate with the first groove, the inner end communicates with the oil storage groove, the depth of the second groove is not less than the depth of the first groove and less than the depth of the first groove. The depth of the oil storage tank is adjusted so that the lubricating oil in the first groove flows into the oil storage tank through the second groove.

Further, the lower wall surface of the oil storage tank is provided with a flexible groove extending along the circumferential direction of the motor bearing, and the depth h1 of the flexible groove and the height h of the crankshaft mounting hole satisfy the relationship: 0≤h1 /h≤1.

The thrust structure according to the embodiment of the present invention further includes: a bearing bush, the bearing bush is inserted into the crankshaft installation hole and abuts between the crankshaft and the motor bearing.

Optionally, the middle part of the crankshaft is provided with a channel extending along its axial direction, the inner peripheral surface of the upper part of the channel is provided with an internal thread to form the threaded hole, wherein the upper part of the crankshaft is provided with a communication The threaded hole and the groove or through hole on the outer peripheral surface of the crankshaft, the crankshaft is also provided with a counterbore located on one side of the threaded hole, and the upper part of the counterbore is connected to the groove or through hole. In communication, the lower portion of the counterbore extends downward beyond the threaded hole to communicate with the passage.

The rotary compressor according to the embodiment of the second aspect of the present invention includes the thrust structure of the compressor according to the embodiment of the present invention.

The refrigeration equipment according to the embodiment of the second aspect of the present invention includes the thrust structure of the compressor according to the embodiment of the present invention.

Additional aspects and advantages of the present invention will be set forth, in part, from the following description, and in part will be apparent from the following description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

1 is a schematic structural diagram of a rotary compressor according to an embodiment of the present invention;

2 is a top view of a motor bearing of a rotary compressor according to an embodiment of the present invention;

3 is a cross-sectional view of a motor bearing of a rotary compressor according to an embodiment of the present invention;

4 is a cross-sectional view of a planar thrust bearing of a rotary compressor according to an embodiment of the present invention;

5 is a schematic structural diagram of a rotary compressor according to another embodiment of the present invention;

6 is a cross-sectional view of a planar thrust bearing of a rotary compressor according to another embodiment of the present invention;

7 is a cross-sectional view of a fastener of a rotary compressor according to another embodiment of the present invention;

8 is an internal schematic diagram of a crankshaft of a rotary compressor according to another embodiment of the present invention;

9 is a schematic structural diagram of a crankshaft of a rotary compressor according to another embodiment of the present invention.

Reference number:

Rotary compressor 1000;

Thrust structure 100; housing 200;

Motor bearing 10; crankshaft mounting hole 101; oil storage groove 102; support table 103; limit surface 104; groove 105; oil balance hole 106; oil storage groove 107; first groove 1071; second groove 1072; 108;

Crankshaft 20; threaded hole 201; channel 202;

Planar thrust bearing 30; lower support piece 31; upper support piece 32; rolling body 33; cage 34;

Thrust sleeve 40;

Fastener 50; threaded rod 51; thrust end 52;

Bearing bushing 60 .

Detailed ways

The following describes in detail the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary, only used to explain the present invention, and should not be construed as a limitation of the present invention. Those skilled in the art can make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations of the invention.

The thrust structure 100 of the compressor according to the embodiment of the present invention will be described below with reference to the accompanying drawings.

Referring to FIGS. 1 to 9 , the thrust structure 100 according to an embodiment of the present invention may include: a motor bearing 10 , a crankshaft 20 and a plane thrust bearing 30 .

Specifically, the motor bearing 10 may be connected to the casing 200 of the compressor, wherein the connection method of the motor bearing 10 and the casing 200 is not particularly limited. Optionally, in the embodiment shown in FIG. 1 , the motor bearing 10 The inner diameter of the housing 200 is connected by welding, that is, the outer peripheral surface of the motor bearing 10 is in contact with the inner peripheral surface of the housing 200, and the two are connected by welding, and the connection effect is good.

As shown in FIG. 1 , the motor bearing 10 is provided with a crankshaft installation hole 101 , the crankshaft 20 is penetrated in the crankshaft installation hole 101 , and the upper part of the crankshaft 20 is provided with a thrust portion protruding outward, as shown in FIGS. 1 to 4 . , in some embodiments, the thrust portion may be a thrust sleeve 40 sleeved on the crankshaft 20 , in other embodiments, as shown in FIGS. 5 to 9 , the thrust portion may be connected to the crankshaft 20 Fastener 50 .

That is to say, in the embodiment of the present invention, the upper part of the crankshaft 20 may be sleeved with a thrust sleeve 40, and the thrust sleeve 40 may protrude outward from the outer peripheral surface of the crankshaft 20 to form a thrust portion, or The upper part of the crankshaft 20 may be provided with a fastener 50, and the fastener 50 may also protrude outward from the outer peripheral surface of the crankshaft 20, thereby forming a thrust portion. Wherein, the thrust portion may protrude from the outer peripheral surface of the crankshaft 20 in the circumferential direction of the crankshaft 20 , or may partially protrude from the outer peripheral surface of the crankshaft 20 .

The plane thrust bearing 30 is sleeved on the crankshaft 20 and abuts between the motor bearing 30 and the thrust portion. Specifically, the plane thrust bearing 30 includes a lower support piece 31 , an upper support piece 32 , a rolling body 33 and a cage 34 . The lower support piece 31 abuts against the motor bearing 10, the upper support piece 32 abuts against the thrust portion, the rolling element 33 and the cage 34 are arranged between the lower support piece 31 and the upper support piece 32, and the rolling element 33 and the cage 34 are connected to each other , the cage 34 can limit the position of the rolling body 33 , so that the rolling body 33 can roll between the lower support piece 31 and the upper support piece 32 variably.

The inventor found that in the related art, whether it is the shaft shoulder thrust or the shaft end thrust, the thrust structure is all sliding friction, because the contact surface of the thrust is small, and the bending deformation is easy to occur during the operation, which makes the oil film. It is difficult to form, it is in a state of boundary lubrication, and the lubrication conditions are relatively poor, which leads to an increase in mechanical friction loss, which leads to the problem of easy wear and tear, which leads to the inability to guarantee reliability.

In view of the discovery of the reasons for the above problems, some new thrust structures 100 are proposed in the embodiments of the present invention. Specifically, by arranging the plane thrust bearing 30 on the motor bearing 10, the thrust position Sliding friction can be turned into rolling friction, so as to reduce power consumption and improve energy efficiency. At the same time, a thrust portion for axially limiting the plane thrust bearing 30 will be provided on the motor bearing 10, which can improve the plane thrust bearing. The installation reliability of the thrust bearing 30 avoids slippage and accidental sliding friction. The thrust portion is formed by the thrust bearing 40 or the fastener 50. This structure is not only convenient for manufacture, but also has a better thrust effect. The overall structure of the crankshaft 20 will not be affected, the original crankshaft can be used, and the reconstruction cost is low.

The thrust structure 100 according to the embodiment of the present invention can suspend the crankshaft 20 on the plane thrust bearing 30 through the cooperation of the motor bearing 10 , the plane thrust bearing 30 and the thrust portion provided on the crankshaft 20 , and the The sliding thrust is changed to the rolling thrust, and the thrust effect is good, which can reduce power consumption and improve energy efficiency.

Optionally, in some embodiments of the present invention, the thrust sleeve 40 is in an interference fit with the crankshaft 20 , that is, the thrust sleeve 40 is fitted on the crankshaft 20 in an interference fit, so that not only the thrust sleeve 40 can be lifted from the crankshaft 20 , The connection reliability of the crankshaft 20 enables the thrust sleeve 40 to bear torque, axial force or a combined load of the two, and has a high bearing capacity, which can improve the thrust reliability.

Here, the interference between the thrust sleeve 40 and the crankshaft 20 can be flexibly set according to the actual situation. For example, in combination with some embodiments of the present invention, the interference between the thrust sleeve 40 and the crankshaft 20 can be set at 1mm-3mm , in this way, the assembly can be made easier while ensuring higher connection reliability.

5, 7 to 9, in some embodiments of the present invention, one end of the crankshaft 20 is provided with a threaded hole 201, the fastener 50 has a threaded rod 51 and a thrust end 52, the thrust end 52 is provided at one end of the threaded rod 51 , the threaded rod 51 is inserted into the threaded hole 201 , and the thrust end 52 abuts against the upper support piece 32 . Optionally, the external thread on the threaded rod 5 may extend from one end of the threaded rod 5 to the other end, or may only be provided on a part of the threaded rod 5 , as shown in FIG. 7 , for example. The related structure of the fastener 50 will be further described later, and will not be repeated here.

The related structure of the motor bearing 10 will be further described below with reference to the accompanying drawings.

1-4 illustrate a thrust structure 100 in accordance with some embodiments of the present invention. 1 to 4, in some embodiments of the present invention, the motor bearing 10 is provided with an oil storage tank 102, the oil storage tank 102 is communicated with the crankshaft mounting hole 101, and the plane thrust bearing 30 is provided in the oil storage tank 102. A support table 103 is provided in the oil tank 102 , the support table 103 can be used to support the lower support piece 31 , and the support table 103 protrudes from the inner wall surface of the oil storage tank 102 .

In this way, the plane thrust bearing 30 can be lubricated by the lubricating oil in the oil storage tank 102, the lubrication is more sufficient, the friction can be further reduced, and the protruding support table 103 can have sufficient strength to support the plane thrust bearing 30, improving the structure Reliability, and can raise the position of the plane thrust bearing 30 in the oil storage tank 102, so that the lubricating oil contacted by the plane thrust bearing 30 will not cause adverse effects. It can enter into the crankshaft installation hole 101 to lubricate the crankshaft 20 and the motor bearing 10, and the lubrication performance is good.

Optionally, as shown in FIGS. 1 to 4 , the oil storage tank 102 is further provided with a limit surface 104 , the limit surface 104 is connected to the outer edge of the support table 103 and extends along the circumferential direction of the motor bearing 10 , that is, the limit surface 104 extends into an arc-shaped surface extending along the circumferential direction of the motor bearing 10 , and the limiting surface 103 is located on the radially outer side of the lower support sheet 31 to limit the position of the lower support sheet 31 from the radial direction.

The limiting surface 104 and the supporting table surface 103 respectively include a plurality of spaced apart along the circumferential direction of the motor bearing 10 . In this way, the support table 103 does not completely occupy the oil storage tank 102 in the circumferential direction, and space for oil storage can be vacated between two adjacent support tables 103, so that the lubrication effect is better. The limiting surfaces 104 also include a plurality of spaced apart along the circumferential direction of the motor bearing 10 , so that the lower support piece 31 can be limited from multiple positions, and the limiting effect is good.

It can be understood that the number of the limiting surfaces 104 and the supporting table tops 103 may be the same, or the number of the limiting surfaces 104 may be lower than the number of the supporting table tops 103 . In the embodiments shown in FIG. 1 to FIG. 4 , the number of the limiting surfaces 104 and the supporting table surfaces 103 is the same, which is three, and each of the supporting table surfaces 103 and the limiting surfaces 104 can be connected to form a stepped support limiting structure. . Therefore, three stepped support and limit structures can be formed in the oil storage tank 102 , and the three support and limit structures can limit the plane thrust bearing 30 at three positions in the circumferential direction of the motor bearing 10 . Works well.

As shown in FIG. 2 to FIG. 4 , the outer diameter of the lower support piece 31 is D1, and the diameter of the circle where the limiting surface 104 is located is D2. According to some embodiments of the present invention, D1 and D2 may satisfy the relationship: D2-D1 ≤2mm, that is, D2≤D1+2mm. For example, in some specific examples, D2=D1, and for another example, in other specific examples, D2=D1-1mm. Therefore, it is more convenient to install the planar thrust bearing 30, and the limiting effect of the limiting surface 104 on the planar thrust bearing 30 is better.

Optionally, the upper edge of the limiting surface 104 may be provided with an oil guide inclined surface extending outward and upward in an axial direction relative to the motor bearing 10 . As shown in FIG. 1 to FIG. The diversion makes it easier for the lubricating oil to enter between the limiting surface 104 and the plane thrust bearing 30 . Optionally, a groove 105 may be formed at the connection between the limiting surface 104 and the support table 103 , and lubricating oil may also be stored in the groove 105 .

As shown in FIGS. 1 to 3 , an oil balance hole 106 is provided on the peripheral wall of the oil storage tank 102 , and the oil balance hole 106 can penetrate through the outer wall surface and the inner wall surface of the oil storage tank 102 . Therefore, when the oil level in the oil storage tank 102 rises to the position of the oil balance hole 106, the lubricating oil can flow out through the oil balance hole 106, which can prevent the oil level in the oil storage tank 102 from being too high and completely submerging the plane Thrust bearing 30 . In addition, when the oil level is lower than the oil balance hole 106, the oil balance hole 106 can make the gas on both sides of the motor bearing 10 communicate with each other, and can play the effect of balancing the air pressure.

The present invention does not impose special restrictions on the number and size of the oil balance holes 106, and the number of the oil balance holes 106 may be one or more. Referring to some embodiments of the present invention, optionally, the radial dimension d2 of the oil balance hole 106 may satisfy: 0.5mm≤d2≤10mm. In this way, the oil is discharged more smoothly, and the strength of the motor bearing 10 is less affected. For example, d2 may be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, and the like. It should be understood that, here, the radial dimension d2 of the oil balance hole 106 is the dimension perpendicular to the extending direction of the balance hole 106 (ie, the penetration direction through the inner wall surface and the outer wall surface of the peripheral wall of the oil storage tank 102 ).

As shown in FIG. 3 and FIG. 4 , the height of the edge of the oil balance hole 106 is H1. Here, the “edge height” is the height of the lower edge of the oil balance hole 106 facing the opening in the oil storage tank 102 from the support table 103 . The thickness of the support sheet 31 is H2, and the diameter of the rolling body 33 is d1. According to some embodiments of the present invention, H1, H2 and d1 may satisfy the following relationship: 0mm≤H1-H2≤0.5×d1. In this way, the lower support sheet 31 can be better infiltrated by the lubricating oil, thereby further improving the wear problem. In some specific examples of the present invention, H1-H2=0.2×d1, and in other specific examples of the present invention, H1-H2=0.4×d1.

Optionally, the motor bearing 10 is further provided with an oil storage groove 107, the storage oil groove 107 includes a first groove 1071 and a second groove 1072, the first groove 1071 is arranged around the oil storage groove 102, and the second groove 1072 is along the motor bearing. 10, and the outer end of the second groove 1072 communicates with the first groove 1071, the inner end of the second groove 1072 communicates with the oil storage 102, and the depth of the second groove 1072 is not less than the first groove. 1071 and the depth of the second groove 1072 is smaller than the depth of the oil storage tank 102 so that the lubricating oil in the first groove 1071 flows into the oil storage tank 102 through the second groove 1072 .

As a result, not only the oil storage tank 102 can receive the lubricating oil flowing down from the upper part of the compressor, but the storage oil tank 107 can also receive the lubricating oil flowing downstream, the oil receiving area of the motor bearing 10 is increased, the oil receiving effect is better, and more The lubricating oil entering the oil storage tank 102 further improves the lubricating effect of the plane thrust bearing 30 .

Optionally, the first groove 1071 may be arranged coaxially with the motor bearing 10 , or may be arranged eccentrically relative to the motor bearing 10 . The number of the second grooves 1072 may be one or more, and the plurality of second grooves 1072 may be spaced apart along the circumferential direction of the motor bearing 10, so that the lubricating oil in the first groove 1071 can pass through The plurality of second grooves 1072 flow into the oil storage tank 102 more quickly, and the oil return effect is good. In the embodiment shown in FIGS. 1 to 3 , there are three second grooves 1072 .

2 and 3 , when the second groove 1072 is provided, a chamfered surface may be formed at the position of the oil storage tank 102 communicating with the second groove 1072, so that the lubricating oil can be guided more smoothly by the chamfered surface into the oil storage tank 102. Alternatively, when there is a chamfer, the oil balance hole 106 may be provided on the chamfer.

According to some embodiments of the present invention, the lower wall surface of the oil storage tank 102 may be provided with a flexible groove 108 . As shown in FIGS. 1 to 3 , the flexible groove 108 may extend along the circumferential direction of the motor bearing 10 . The depth of the flexible groove 108 is h1, and the height of the crankshaft mounting hole 101 (ie, the dimension extending in the axial direction of the crankshaft 20 or the motor bearing 10) is h. Research shows that h1 and h can satisfy the following relationship: 0≤h1/h≤1, and the reliability of compressor operation can be improved. Here, h1/h=0, that is, h1=0, that is, without the flexible groove 108 .

In order to improve the sealing effect of the motor bearing 10 and the crankshaft 20 and reduce wear, as shown in FIG. 1 , optionally, the thrust structure 100 may further include a bearing bushing 60 inserted into the crankshaft mounting hole 101 And stop between the crankshaft 20 and the motor bearing 10 .

5 to 9 illustrate a thrust structure 100 according to other embodiments of the present invention. The structure of the motor bearing 10 is substantially the same as the structure shown in FIG. 1 to FIG. 4 , and will not be described in detail here, but the above can be referred to. The related structure of the fastener 50 will be further described below.

As shown in FIGS. 8 and 9 , a channel 202 (or a central hole) is provided in the middle of the crankshaft 20 , and the channel 202 extends along the axial direction of the crankshaft 20 . The inner peripheral surface of the upper part of the channel 202 is provided with internal threads to form threaded holes 201 , and the upper part of the crankshaft 20 is provided with a groove 203 or a through hole connecting the threaded hole 201 and the outer peripheral surface of the crankshaft 20 . When the crankshaft 20 has grooves 203 , the grooves 203 are provided on the upper end surface of the crankshaft 20 , as shown in FIG. 6 ; The crankshaft 20 is also provided with a counterbore 204 located on one side of the threaded hole 201. The counterbore 204 communicates with the threaded hole 201, the upper part of the counterbore 204 is communicated with the groove 203 or the through hole, and the lower part of the counterbore 204 extends downward to Beyond the threaded hole 201 to communicate with the channel 202 .

Thus, lubricating oil can enter the counterbore 204 and the threaded hole 201 through the groove 203 or through hole, and then flow down the counterbore 204 past the fastener 50, into the channel 202, and then along the channel 202 The downward flow realizes oil return, so that not only the oil return effect is better, but also the lubricating oil can flow to the fasteners 50 to avoid corrosion of the metal fasteners 50, which can further improve the reliability and energy efficiency of the compressor.

The present invention also provides a rotary compressor 1000 . As shown in FIGS. 1 and 5 , the rotary compressor 1000 includes the thrust structure 100 described above, and the thrust structure 100 is provided in the casing 200 . Since the thrust structure 100 according to the embodiment of the present invention has the above-mentioned beneficial technical effects, the friction of the rotary compressor according to the embodiment of the present invention is reduced, and the working reliability and energy efficiency are improved.

The present invention also provides a refrigeration device, and the refrigeration device may include the thrust structure 100 according to the embodiment of the present invention. Due to the improvement of the thrust structure 100, the operational reliability of the refrigeration equipment is improved. Optionally, the refrigerating device may be an air conditioner or other device capable of refrigerating.

Other structures and operations of the refrigeration equipment, the rotary compressor 1000 and the thrust structure 100 according to the embodiments of the present invention are known to those of ordinary skill in the art, and will not be described in detail here.

In the description of this specification, description with reference to the terms "embodiment," "specific embodiment," "example," etc. means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one aspect of the present invention. in one embodiment or example. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner without interfering or contradicting one another in any one or more embodiments or examples.

Claims (14)

1. A thrust structure of a compressor, comprising:

the motor bearing is suitable for being connected with the shell of the compressor and is provided with a crankshaft mounting hole;

the crankshaft penetrates through the crankshaft mounting hole, the upper part of the crankshaft is provided with a thrust part protruding outwards, and the thrust part is a thrust shaft sleeve sleeved on the crankshaft or a fastener connected with the crankshaft;

the plane thrust bearing is sleeved on the crankshaft and comprises a lower supporting sheet, an upper supporting sheet, a rolling body and a retainer, wherein the lower supporting sheet is abutted against the motor bearing, the upper supporting sheet is abutted against the thrust part, and the rolling body and the retainer are arranged between the lower supporting sheet and the upper supporting sheet and are connected with each other.

2. The thrust structure of a compressor according to claim 1, wherein the thrust collar is in interference fit with the crankshaft.

3. The thrust structure of a compressor according to claim 1, wherein a threaded hole is formed at one end of the crankshaft, the fastening member has a threaded rod inserted into the threaded hole and a thrust end provided at one end of the threaded rod, and the thrust end abuts against the upper support piece.

4. The thrust structure of a compressor according to claim 1, wherein the motor bearing is provided with an oil reservoir communicating with the crankshaft mounting hole, the planar thrust bearing is provided in the oil reservoir, a support table for supporting the lower support piece is provided in the oil reservoir, and the support table protrudes from an inner wall surface of the oil reservoir.

5. The thrust structure of a compressor according to claim 4, wherein a stopper surface connected to an outer edge of the support table surface, located radially outside the lower support piece, and extending in a circumferential direction of the motor bearing is further provided in the oil reservoir, the stopper surface and the support table surface each include a plurality of portions spaced apart in the circumferential direction of the motor bearing, and an outer diameter D1 of the lower support piece and a diameter D2 of a circle in which the stopper surface is located satisfy the relationship: D2-D1 is less than or equal to 2 mm.

6. The thrust structure of a compressor according to claim 4, wherein a peripheral wall of the oil reservoir is provided with at least one oil balance hole penetrating an outer wall surface and an inner wall surface thereof.

7. The thrust structure of a compressor according to claim 6, wherein a radial dimension d2 of the oil balance hole satisfies: d2 is not less than 0.5mm and not more than 10 mm.

8. The thrust structure of a compressor according to claim 6, wherein an edge height H1 of the oil balance hole, a thickness H2 of the lower support piece, and a diameter d1 of the rolling body satisfy a relation: H1-H2 is more than or equal to 0mm and less than or equal to 0.5 multiplied by d 1.

9. The thrust structure of a compressor according to claim 4, wherein a receiving oil groove is further provided on the motor bearing, the receiving oil groove including:

a first groove arranged around the oil storage tank;

the second recess, the second recess is followed radial extension and outer end of motor bearing with first recess intercommunication, inner with the oil storage tank intercommunication, the degree of depth of second recess is not less than the degree of depth of first recess just is less than the degree of depth of oil storage tank is so that lubricating oil in the first recess flows in through the second recess the oil storage tank.

10. The thrust structure of a compressor according to claim 9, wherein a lower wall surface of the oil reservoir is provided with a flexible groove extending in a circumferential direction of the motor bearing, and a depth h1 of the flexible groove and a height h of the crankshaft mounting hole satisfy a relation: h1/h is more than or equal to 0 and less than or equal to 1.

11. The thrust structure of a compressor according to claim 1, further comprising:

and the bearing bush is inserted in the crankshaft mounting hole and is abutted between the crankshaft and the motor bearing.

12. The thrust structure of a compressor according to claim 3, wherein a middle portion of the crankshaft is provided with a passage extending in an axial direction thereof, an inner peripheral surface of an upper portion of the passage is provided with an internal thread to form the threaded hole, wherein,

the upper portion of bent axle is equipped with the intercommunication the screw hole with the recess or the through-hole of the outer peripheral face of bent axle, still be equipped with in the bent axle and be located the counter bore of one side of screw hole, the upper portion of counter bore with recess or through-hole intercommunication, the lower part downwardly extending of counter bore exceed the screw hole with the passageway intercommunication.

13. A rotary compressor characterized by comprising a thrust structure of a compressor according to any one of claims 1 to 12.

14. A refrigerating apparatus comprising a thrust structure of a compressor according to any one of claims 1 to 12.

Images