CN110873055A - Thrust structure of compressor, rotary compressor and refrigeration equipment with thrust structure - 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 with thrust structure

Technical Field

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

Background

In the related art, there are two structures for supporting the rotation of the crankshaft and the rotor member in the compressor. One is crankshaft eccentric thrust surface thrust, namely the eccentric thrust surface is abutted against the end surface of a lower bearing to form thrust, commonly called shaft shoulder thrust; the other is thrust at the tail part of the lower end of the crankshaft, namely the tail end of the crankshaft is abutted against a thrust gasket fixed on a lower bearing, which is commonly called shaft end thrust. Both of the above structures are often prone to wear problems at the thrust structures.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. To this end, an object of the present invention is to provide a thrust structure of a compressor, which has improved wear and is advantageous for improving the energy efficiency of the compressor.

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

The invention also provides refrigeration equipment with the thrust structure.

The thrust structure of a compressor according to an embodiment of the first aspect of the present invention includes: 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.

The abrasion of the thrust structure of the compressor can be improved, and the energy efficiency of the compressor can be improved.

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

optionally, the thrust collar is an interference fit with the crankshaft.

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

Optionally, the motor bearing is provided with an oil storage tank communicated with the crankshaft mounting hole, the planar thrust bearing is arranged in the oil storage tank, a supporting table top used for supporting the lower supporting piece is arranged in the oil storage tank, and the supporting table top protrudes out of the inner wall surface of the oil storage tank.

Further, still be equipped with in the oil storage tank with the outer edge of support mesa links to each other, is located the radial outside of lower backing sheet and edge the spacing face of the circumference extension of motor bearing, spacing face with the support mesa includes respectively along a plurality of the circumference interval setting of motor bearing, the outer diameter D1 of lower backing sheet with the diameter D2 of the circle at spacing face place satisfies the relational expression: D2-D1 is less than or equal to 2 mm.

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

According to some embodiments of the invention, the radial dimension d2 of the oil balancing hole satisfies: d2 is not less than 0.5mm and not more than 10 mm.

Optionally, the oil balance hole has an edge height H1, the lower support plate has a thickness H2, and the rolling element has a diameter d1 that satisfy the relationship: H1-H2 is more than or equal to 0mm and less than or equal to 0.5 multiplied by d 1.

In some embodiments of the present invention, the motor bearing is further provided with an oil receiving groove, and the oil receiving groove includes: 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.

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 relation: h1/h is more than or equal to 0 and less than or equal to 1.

The thrust structure according to the embodiment of the present invention further includes: and the bearing bush is inserted in the crankshaft mounting hole and is abutted between the crankshaft and the motor bearing.

Optionally, a channel extending along an axial direction of the crankshaft is arranged in the middle of the crankshaft, an inner circumferential surface of an upper portion of the channel is provided with an internal thread to form the threaded hole, a groove or a through hole communicating the threaded hole and the outer circumferential surface of the crankshaft is arranged in the upper portion of the crankshaft, a counter bore located on one side of the threaded hole is further arranged in the crankshaft, an upper portion of the counter bore is communicated with the groove or the through hole, and a lower portion of the counter bore extends downwards to exceed the threaded hole to be communicated with the channel.

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 invention comprises the thrust structure of the compressor according to the embodiment of the invention.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

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

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

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

fig. 3 is a sectional view of a motor bearing of the rotary compressor according to one embodiment of the present invention;

fig. 4 is a sectional view of a plane thrust bearing of the rotary compressor according to one embodiment of the present invention;

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

fig. 6 is a sectional view of a plane thrust bearing of a rotary compressor according to another embodiment of the present invention;

fig. 7 is a sectional view of a fastening member of a rotary compressor according to another embodiment of the present invention;

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

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

Reference numerals:

a rotary compressor 1000;

a thrust structure 100; a housing 200;

a motor bearing 10; a crankshaft mounting hole 101; an oil reservoir 102; a support table 103; a limiting surface 104; a groove 105; oil balance holes 106; a housing oil tank 107; the first groove 1071; a second groove 1072; a flexible groove 108;

a crankshaft 20; a threaded hole 201; a channel 202;

a planar thrust bearing 30; lower support sheet 31; an upper support sheet 32; rolling elements 33; a holder 34;

a thrust collar 40;

a fastener 50; a threaded rod 51; a thrust tip 52;

bearing bushing 60.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention. Numerous changes, modifications, substitutions and alterations can be made to the embodiments by those skilled in the art without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

A thrust structure 100 of a compressor according to an embodiment of the present invention is described below with reference to the accompanying drawings.

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

Specifically, the motor bearing 10 may be connected to the casing 200 of the compressor, wherein the connection manner between the motor bearing 10 and the casing 200 is not particularly limited, and optionally, in the embodiment shown in fig. 1, the motor bearing 10 is connected to the inner diameter of the casing 200 by welding, that is, the outer circumferential surface of the motor bearing 10 abuts against the inner circumferential surface of the casing 200, and the two are welded together, so that the connection effect is good.

As shown in fig. 1, the motor bearing 10 is provided with a crankshaft mounting hole 101, the crankshaft 20 is disposed in the crankshaft mounting hole 101, and an upper portion of the crankshaft 20 is provided with a thrust portion protruding outward, as shown in fig. 1 to 4, in some embodiments, the thrust portion may be a thrust sleeve 40 sleeved on the crankshaft 20, and in other embodiments, as shown in fig. 5 to 9, the thrust portion may be a fastening member 50 connected to the crankshaft 20.

That is, in the embodiment of the present invention, the thrust bushing 40 may be sleeved on the upper portion of the crankshaft 20, and the thrust bushing 40 may protrude outward from the outer circumferential surface of the crankshaft 20 to form the thrust portion, or the upper portion of the crankshaft 20 may be provided with the fastening member 50, and the fastening member 50 may protrude outward from the outer circumferential surface of the crankshaft 20 to form the thrust portion. The thrust portion may protrude from the outer circumferential surface of the crankshaft 20 in the circumferential direction of the crankshaft 20, or may partially protrude from the outer circumferential surface of the crankshaft 20.

The flat thrust bearing 30 is sleeved on the crankshaft 20 and stops between the motor bearing 30 and the thrust part. Specifically, the planar thrust bearing 30 includes a lower support piece 31, an upper support piece 32, rolling bodies 33, and a cage 34. The lower support plate 31 abuts against the motor bearing 10, the upper support plate 32 abuts against the thrust part, the rolling bodies 33 and the cage 34 are provided between the lower support plate 31 and the upper support plate 32, and the rolling bodies 33 and the cage 34 are connected to each other, and the cage 34 may position-define the rolling bodies 33 such that the rolling bodies 33 can variably roll between the lower support plate 31 and the upper support plate 32.

The inventor finds that in the related art, no matter the thrust of the shaft shoulder or the thrust of the shaft end, the thrust structure is sliding friction, because the thrust contact surface is smaller, and in addition, the bending deformation easily occurs in the operation process, so that an oil film is difficult to form, and is in a boundary lubrication state, the lubrication condition is severe, and the mechanical friction loss is increased, so that the problem of easy abrasion is caused, and the reliability cannot be ensured.

In view of the discovery of the reasons for the above problems, the embodiment of the present invention provides some thrust structures 100 with new structures, and specifically, by providing a planar thrust bearing 30 on a motor bearing 10, the sliding friction at the thrust position can be changed into rolling friction, thereby achieving the purposes of reducing power consumption and improving energy efficiency, and meanwhile, by providing a thrust portion for axially limiting the planar thrust bearing 30 on the motor bearing 10, the installation reliability of the planar thrust bearing 30 can be improved, thereby avoiding the occurrence of slippage and generating unexpected sliding friction, and the thrust portion is formed by a thrust bearing 40 or a fastener 50, which is not only convenient for manufacturing, but also has better thrust effect, and does not affect the overall structure of a crankshaft 20, and can utilize the original crankshaft, and the modification cost is low.

According to the thrust structure 100 of the embodiment of the invention, the crankshaft 20 can be hung on the plane thrust bearing 30 through the mutual matching of the motor bearing 10, the plane thrust bearing 30 and the thrust part arranged on the crankshaft 20, and the thrust is changed from sliding thrust to rolling thrust, so that the thrust effect is good, the purposes of reducing power consumption and improving energy efficiency can be achieved, and the thrust structure has the advantages of convenience in manufacturing, low transformation cost and the like.

Optionally, in some embodiments of the present invention, the thrust collar 40 is in an interference fit with the crankshaft 20, that is, the thrust collar 40 is sleeved on the crankshaft 20 in an interference manner, which not only can improve the connection reliability of the thrust collar 40 and the crankshaft 20, so that the thrust collar 40 can bear a load of torque, axial force or a combination of the torque and the axial force, the bearing capacity is high, and the thrust reliability can be improved.

Here, the interference between the thrust collar 40 and the crankshaft 20 may be flexibly set according to practical situations, for example, in combination with some embodiments of the present invention, the interference between the thrust collar 40 and the crankshaft 20 may be set to 1mm to 3mm, which may make assembly easier while ensuring high connection reliability.

Referring to fig. 5, 7 to 9, in some embodiments of the present invention, a threaded hole 201 is formed at one end of the crankshaft 20, the fastening member 50 has a threaded rod 51 and a thrust tip 52, the thrust tip 52 is formed at one end of the threaded rod 51, the threaded rod 51 is inserted into the threaded hole 201, and the thrust tip 52 abuts against the upper support plate 32. Alternatively, the external thread on the threaded rod 5 may extend from one end of the threaded rod 5 to the other end, or may be provided on only a portion of the threaded rod 5, as shown in fig. 7, for example. The structure associated with the fastener 50 will be further described later and will not be described in detail.

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

Fig. 1-4 illustrate a thrust structure 100 according to some embodiments of the present invention. Referring to fig. 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, the planar thrust bearing 30 is disposed in the oil storage tank 102, a support table 103 is disposed in the oil storage tank 102, the support table 103 can be used for supporting the lower support plate 31, and the support table 103 protrudes from an inner wall surface of the oil storage tank 102.

Thus, 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, moreover, the protruding support table surface 103 can have enough strength to support the plane thrust bearing 30, the structural reliability is improved, in addition, the position of the plane thrust bearing 30 in the oil storage tank 102 can be raised, so that the lubricating oil contacted by the plane thrust bearing 30 cannot be too much to cause adverse effects, in addition, the lubricating oil entering the oil storage tank 102 can also enter the crankshaft mounting hole 101 to lubricate the crankshaft 20 and the motor bearing 10, and the lubricating performance is good.

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

The stopper surface 104 and the support table surface 103 each include a plurality of surfaces arranged at intervals in the circumferential direction of the motor bearing 10. Thus, the supporting table top 103 does not completely occupy the oil storage tank 102 in the circumferential direction, and a space for storing oil can be left between two adjacent supporting table tops 103, so that the lubricating effect is better. The limiting surface 104 also comprises a plurality of limiting surfaces which are arranged along the circumferential direction of the motor bearing 10 at intervals, so that the lower support piece 31 can be limited from a plurality of positions, and the limiting effect is good.

It is understood that the number of the limiting surfaces 104 and the number of the supporting table tops 103 may be the same, or the number of the limiting surfaces 104 may be smaller than the number of the supporting table tops 103. In the embodiment shown in fig. 1 to 4, the number of the limiting surfaces 104 and the number of the supporting table surfaces 103 are the same, and are three, and each supporting table surface 103 and the limiting surface 104 can be connected to form a stepped supporting and limiting structure. Therefore, three stepped supporting and limiting structures can be formed in the oil storage tank 102, the three supporting and limiting structures can limit the plane thrust bearing 30 at three positions in the circumferential direction of the motor bearing 10, and the limiting effect is good.

As shown in fig. 2-4, the outer diameter of lower support piece 31 is D1, and the diameter of the circle on which limiting surface 104 is located is D2. according to some embodiments of the invention, D1 and D2 may satisfy the relationship: D2-D1 is less than or equal to 2mm, namely D2 is less than or equal to D1+2 mm. For example, in some specific examples, D2 ═ D1, and in still other specific examples, D2 ═ D1-1 mm. Therefore, the plane thrust bearing 30 is more convenient to mount, and the limiting effect of the limiting surface 104 on the plane thrust bearing 30 is better.

Alternatively, the upper edge of the limiting surface 104 may be provided with an oil guiding inclined surface which extends obliquely outward and upward relative to the axial direction of the motor bearing 10, as shown in fig. 1 to 3, and the oil guiding inclined surface may guide the lubricating oil, so that the lubricating oil can more easily enter between the limiting surface 104 and the planar thrust bearing 30. Optionally, a groove 105 may be formed at the connection between the limiting surface 104 and the supporting table surface 103, and lubricating oil may be stored in the groove 105.

As shown in fig. 1 to 3, an oil balance hole 106 is provided in the peripheral wall of the oil reservoir 102, and the oil balance hole 106 can penetrate the outer wall surface and the inner wall surface of the oil reservoir 102. Thus, when the oil level in the oil reservoir 102 rises to the position of the oil balance hole 106, the lubricating oil can flow out through the oil balance hole 106, so that it is possible to avoid that the oil level in the oil reservoir 102 is too high to completely submerge the flat thrust bearing 30. In addition, when the oil level is lower than the oil balance hole 106, the oil balance hole 106 may communicate the air on both sides of the motor bearing 10, thereby achieving the effect of balancing the air pressure.

The number, size, etc. of the oil balance holes 106 are not particularly limited in the present invention, and the number of the oil balance holes 106 may be one or more, etc. With reference to some embodiments of the present invention, optionally, the radial dimension d2 of the oil balancing hole 106 may satisfy: d2 is not less than 0.5mm and not more than 10 mm. Thus, oil is discharged more smoothly, and the influence on the strength of the motor bearing 10 is small. For example, d2 can be 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and the like. It should be understood that the radial dimension d2 of the oil balance hole 106 is a dimension of the oil balance hole 106 perpendicular to the extending direction thereof (i.e., the penetrating direction through the inner wall surface and the outer wall surface of the peripheral wall of the oil reservoir 102).

As shown in fig. 3 and 4, the oil balance hole 106 has an edge height H1, where the "edge height" is the height of the lower edge of the oil balance hole 106 facing the opening in the oil sump 102 from the support table 103, the lower support 31 has a thickness H2, and the rolling elements 33 have a diameter d1, and according to some embodiments of the present invention, H1, H2, and d1 may satisfy the following relations: H1-H2 is more than or equal to 0mm and less than or equal to 0.5 multiplied by d 1. Thus, lower support piece 31 can be better wetted with lubricating oil, further improving wear problems. In some specific examples of the invention, H1-H2-0.2 × d1, and in other specific examples of the invention, H1-H2-0.4 × d 1.

Optionally, motor bearing 10 is further provided with a storage oil groove 107, the storage oil groove 107 includes a first groove 1071 and a second groove 1072, the first groove 1071 is disposed around oil storage tank 102, the second groove 1072 extends along the radial direction of 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 oil storage tank 102, the depth of the second groove 1072 is not less than the depth of the first groove 1071 and the depth of the second groove 1072 is less than the depth of oil storage tank 102 so that the lubricant in the first groove 1071 flows into oil storage tank 102 through the second groove 1072.

Therefore, the oil storage tank 102 can receive lubricating oil flowing down from the upper part of the compressor, the oil storage tank 107 can also receive the lubricating oil flowing down, the oil receiving area of the motor bearing 10 is increased, the oil receiving effect is better, more lubricating oil can enter the oil storage tank 102, and the lubricating effect of the plane thrust bearing 30 is further improved.

Alternatively, the first groove 1071 may be disposed coaxially with the motor bearing 10, or may be disposed eccentrically with respect to the motor bearing 10. The number of second recess 1072 can be one, also can be a plurality of, and a plurality of second recesses 1072 can be along motor bearing 10's circumference spaced apart the setting, can make like this the lubricating oil in the first recess 1071 flow into the oil storage tank 102 more fast through a plurality of second recesses 1072 in, it is effectual to return oil. In the embodiment shown in fig. 1-3, there are three second grooves 1072.

Referring to fig. 2 and 3, when the second groove 1072 is provided, a chamfered surface may be formed at a position of the oil storage groove 102 communicating with the second groove 1072 so that the lubricating oil can more smoothly flow into the oil storage groove 102 under the guidance of the chamfered surface. Alternatively, when a chamfer is present, the oil balance holes 106 may be provided on the chamfer.

According to some embodiments of the present invention, the lower wall surface of the oil reservoir 102 may be provided with a flexible groove 108, as shown in fig. 1 to 3, and the flexible groove 108 may extend in 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 (i.e., the dimension extending in the axial direction of the crankshaft 20 or the motor bearing 10) is h. Studies have shown that h1 and h satisfy the following relationships: h1/h is more than or equal to 0 and less than or equal to 1, and the running reliability of the compressor can be improved. Here, h1/h is 0, i.e., h1 is 0, i.e., there is no flexible groove 108.

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

Fig. 5-9 illustrate a thrust structure 100 according to further embodiments of the present invention. The structure of the motor bearing 10 is substantially the same as that shown in fig. 1 to 4, and will not be described in detail here, so that reference may be made to the foregoing description. The structure associated with the fastener 50 is described further below.

As shown in fig. 8 and 9, a passage 202 (or a center hole) is provided in the middle of the crankshaft 20, and the passage 202 extends in the axial direction of the crankshaft 20. An inner circumferential surface of an upper portion of the passage 202 is provided with female threads to form a screw hole 201, and an upper portion of the crankshaft 20 is provided with a groove 203 or a through hole communicating the screw hole 201 and an outer circumferential surface of the crankshaft 20. When the groove 203 is formed in the crankshaft 20, the groove 203 is formed in the upper end surface of the crankshaft 20, as shown in fig. 6; when the crankshaft 20 is provided with a through hole, the through hole may be provided at an upper portion of the crankshaft 20. Also disposed within crankshaft 20 is a counterbore 204 located to one side of threaded bore 201, counterbore 204 communicating with threaded bore 201, an upper portion of counterbore 204 communicating with groove 203 or through bore, and a lower portion of counterbore 204 extending downwardly beyond threaded bore 201 to communicate with passage 202.

Therefore, lubricating oil can enter the counter bore 204 and the threaded hole 201 through the groove 203 or the through hole, then flows downwards along the counter bore 204 to exceed the fastening piece 50, enters the channel 202, and then flows downwards along the channel 202 to realize oil return, so that the oil return effect is good, the lubricating oil can flow to the fastening piece 50, the metal fastening piece 50 is prevented from being rusted, and the reliability and the energy efficiency of the compressor can be further improved.

The present invention also provides a rotary compressor 1000, as shown in fig. 1 and 5, the rotary compressor 1000 includes the thrust structure 100, and the thrust structure 100 is disposed in the housing 200. Since the thrust structure 100 according to the embodiment of the present invention has the above-described advantageous technical effects, the rotary compressor according to the embodiment of the present invention has reduced friction, and improved operational reliability and energy efficiency.

The invention also provides a refrigeration device which can comprise the thrust structure 100 according to the embodiment of the invention. Due to the improvement of the thrust structure 100, the operation reliability of the refrigeration equipment is improved. Alternatively, the refrigeration device may be a device capable of cooling, such as an air conditioner.

Other constructions and operations of the refrigerating apparatus, the rotary compressor 1000, and the thrust structure 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "particular embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above 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 in any one or more embodiments or examples without interference or contradiction.

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.

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