Thrust structure of compressor, rotary compressor and refrigeration equipment with thrust structure
阅读说明:本技术 压缩机的止推结构、具有其的旋转式压缩机和制冷设备 (Thrust structure of compressor, rotary compressor and refrigeration equipment with thrust structure ) 是由 杨茂 冯瑞金 廖健生 于 2018-08-31 设计创作,主要内容包括:本发明公开了一种压缩机的止推结构、具有其的旋转式压缩机和制冷设备,止推结构包括:适于与压缩机的外壳相连的电机轴承,电机轴承设有曲轴安装孔;曲轴,曲轴穿设在曲轴安装孔内,曲轴的上部设有向外凸出的止推部,止推部为套设于曲轴的止推轴套或与曲轴相连的紧固件;平面止推轴承,平面止推轴承外套于曲轴且包括与电机轴承相抵的下支撑片、与止推部相抵的上支撑片以及设在下支撑片和上支撑片之间的彼此连接的滚动体和保持架。根据本发明实施例的压缩机的止推结构的磨损可以得到改善,有利于提升压缩机的能效。(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.)
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.
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
a
a motor bearing 10; a
a
a planar thrust bearing 30;
a
a
bearing
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
Referring to fig. 1 to 9, a
Specifically, the motor bearing 10 may be connected to the
As shown in fig. 1, the motor bearing 10 is provided with a
That is, in the embodiment of the present invention, the thrust bushing 40 may be sleeved on the upper portion of the
The flat thrust bearing 30 is sleeved on the
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
According to the
Optionally, in some embodiments of the present invention, the
Here, the interference between the
Referring to fig. 5, 7 to 9, in some embodiments of the present invention, a threaded
The structure of the
Fig. 1-4 illustrate a
Thus, the plane thrust bearing 30 can be lubricated by the lubricating oil in the
Optionally, as shown in fig. 1 to 4, a limiting
The
It is understood that the number of the limiting
As shown in fig. 2-4, the outer diameter of
Alternatively, the upper edge of the limiting
As shown in fig. 1 to 3, an
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
As shown in fig. 3 and 4, the
Optionally, motor bearing 10 is further provided with a
Therefore, the
Alternatively, the
Referring to fig. 2 and 3, when the
According to some embodiments of the present invention, the lower wall surface of the
In order to improve the sealing effect of the
Fig. 5-9 illustrate a
As shown in fig. 8 and 9, a passage 202 (or a center hole) is provided in the middle of the
Therefore, lubricating oil can enter the counter bore 204 and the threaded
The present invention also provides a
The invention also provides a refrigeration device which can comprise the
Other constructions and operations of the refrigerating apparatus, the
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.
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