CN108662008B - Bearing assembly for compressor, compressor and bearing assembly assembling method - Google Patents

Bearing assembly for compressor, compressor and bearing assembly assembling method Download PDF

Info

Publication number
CN108662008B
CN108662008B CN201810629243.XA CN201810629243A CN108662008B CN 108662008 B CN108662008 B CN 108662008B CN 201810629243 A CN201810629243 A CN 201810629243A CN 108662008 B CN108662008 B CN 108662008B
Authority
CN
China
Prior art keywords
groove
hole
bearing
compressor
shaft sleeve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201810629243.XA
Other languages
Chinese (zh)
Other versions
CN108662008A (en
Inventor
方智祥
郑立宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Meizhi Compressor Co Ltd
Original Assignee
Guangdong Meizhi Compressor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Guangdong Meizhi Compressor Co Ltd filed Critical Guangdong Meizhi Compressor Co Ltd
Priority to CN201810629243.XA priority Critical patent/CN108662008B/en
Publication of CN108662008A publication Critical patent/CN108662008A/en
Application granted granted Critical
Publication of CN108662008B publication Critical patent/CN108662008B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/02—Crankshaft bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/02—Rigid support of bearing units; Housings, e.g. caps, covers in the case of sliding-contact bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/50—Bearings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

The invention discloses a bearing assembly for a compressor, the compressor and a bearing assembly assembling method, wherein the bearing assembly for the compressor comprises the following components: the bearing is provided with a first through hole for a crankshaft of the compressor to pass through, the inner peripheral wall of the bearing is provided with a groove which extends into an annular shape along the circumferential direction of the bearing, and the outline line of the bottom wall of the groove is arc-shaped on the longitudinal section passing through the central axis of the first through hole; the shaft sleeve is provided with a second through hole for the crankshaft to pass through, the shaft sleeve is positioned in the groove, the outline of the peripheral wall of the shaft sleeve is arc-shaped which is matched with the outline of the bottom wall of the groove on the longitudinal section of the central axis passing through the second through hole, and the shaft sleeve can rotate in the groove along the axis vertical to the central axis of the first through hole. According to the bearing assembly for the compressor, the reliability and the service life of the operation of the crankshaft can be improved. In addition, the shaft sleeve is assembled without using other connecting fixing pieces, so that the manufacturing and assembling cost of the bearing assembly is reduced.

Description

Bearing assembly for compressor, compressor and bearing assembly assembling method
Technical Field
The invention relates to the field of compressors, in particular to a bearing assembly for a compressor, the compressor and an assembly method of the bearing assembly.
Background
In the related art, a crankshaft of a rotary compressor is easily pulled to deviate under the action of magnetic tension of a motor, so that uneven gaps are formed between the crankshaft and the motor. In addition, the bent axle after being pulled and biased has larger friction with the motor in the running process, thereby generating larger noise and further affecting the reliability and the service life of the rotary compressor.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a bearing assembly for a compressor, which can improve the reliability of the operation of a crankshaft.
The invention also provides a bearing assembly assembling method which is suitable for the bearing assembly.
The invention also provides a compressor comprising the bearing assembly.
A bearing assembly for a compressor according to an embodiment of the present invention includes: the bearing is provided with a first through hole for a crankshaft of the compressor to pass through, the inner peripheral wall of the bearing is provided with a groove which extends into a ring shape along the circumferential direction of the bearing, and the outline line of the bottom wall of the groove is arc-shaped on the longitudinal section passing through the central axis of the first through hole; the shaft sleeve is provided with a second through hole for the crankshaft to pass through, the shaft sleeve is positioned in the groove, on the longitudinal section passing through the central axis of the second through hole, the outline of the peripheral wall of the shaft sleeve is arc-shaped which is matched with the outline of the bottom wall of the groove, and the shaft sleeve can rotate in the groove along the axis vertical to the central line of the first through hole.
According to the bearing assembly for the compressor, the bearing and the shaft sleeve are arranged, the crankshaft can penetrate through the second through hole of the shaft sleeve, the bearing and the shaft sleeve have supporting and limiting functions on the crankshaft, relative swinging of the crankshaft can be reduced, working noise of the crankshaft is reduced, working reliability of the crankshaft is improved, and service life of the compressor is prolonged. In addition, the shaft sleeve is arranged in the groove of the bearing, and the bearing can support and limit the shaft sleeve without using other connecting fixing pieces, so that the structure of the bearing assembly is simplified, and the manufacturing and assembling cost of the bearing assembly is reduced.
According to some embodiments of the invention, a diameter of a circle where a contour line of a bottom wall of the recess is located is D in a longitudinal section passing through a central axis of the first through hole, and a diameter of a circle where a contour line of an outer peripheral wall of the boss is located is D in a longitudinal section passing through a central axis of the second through hole, and satisfies: 5um < D-D < 140um.
Further, on a longitudinal section passing through the central axis of the first through hole, a diameter of a circle where the contour line of the bottom wall of the groove is located is D, and on a longitudinal section passing through the central axis of the second through hole, a diameter of a circle where the contour line of the outer peripheral wall of the sleeve is located is D, and the requirements are satisfied: 10um < D-D < 80um.
According to some embodiments of the invention, the inner peripheral wall of the bearing is provided with a mounting groove extending in the axial direction thereof, one end of the mounting groove extends to an end face of one axial end of the bearing, and the other end of the mounting groove extends to an inner wall face of the groove to communicate with the groove.
Further, the number of the mounting grooves is two, and the two mounting grooves are centrosymmetric with respect to the center line of the first through hole.
In some embodiments of the invention, the depth of the mounting groove is greater than or equal to the maximum depth of the groove.
In some embodiments of the present invention, the width of the mounting groove is W, the height of the sleeve is H1 in the axial direction of the bearing, and the following are satisfied: h1 is less than or equal to W.
According to some embodiments of the invention, in a longitudinal section through the central axis of the first through hole, the contour line of the bottom wall of the groove is circular arc, and the contour line of the outer peripheral wall of the sleeve is circular arc adapted to the contour line of the bottom wall of the groove.
Further, on a longitudinal section passing through the central axis of the first through hole, a diameter of a circle where the contour line of the bottom wall of the groove is located is D, and on a cross section perpendicular to the central axis of the first through hole, a maximum diameter of the outer contour of the groove is D1, and satisfies: d=d1.
According to some embodiments of the invention, the bearing comprises: the shaft sleeve part is provided with the first through hole for the crankshaft to pass through, and the groove is formed in the inner peripheral wall of the shaft sleeve part; the annular part is sleeved at one end of the shaft sleeve part.
Further, the groove is adjacent to an end of the boss remote from the annular portion.
In some embodiments of the invention, the bushing portion comprises: the groove is formed in the inner peripheral wall of the main body section; and the expansion section is connected with the main body section, the annular part is sleeved on the expansion section, and the minimum cross-sectional area of the expansion section is larger than the cross-sectional area of the main body section.
In some embodiments of the invention, the width of the groove is the same as the height of the body section along the axial direction of the first through hole.
According to the assembly method of the bearing assembly of the embodiment of the present invention, when the inner peripheral wall of the bearing is provided with the mounting groove extending in the axial direction thereof, one end of the mounting groove extends to the end face of the axial end of the bearing, the other end of the mounting groove extends to the inner wall face of the groove to communicate with the groove, and the two mounting grooves are two, when the two mounting grooves are centrosymmetric with respect to the center line of the first through hole, the assembly method includes: placing the shaft sleeve on one axial side of the bearing, enabling the shaft sleeve to be opposite to the first through hole, and enabling the center line of the first through hole to be perpendicular to the center line of the second through hole; rotating the shaft sleeve along the central line of the first through hole to enable the central line of the second through hole to be perpendicular to the connecting line of the midpoints of the bottom walls of the two mounting grooves; the shaft sleeve is placed into the bearing from the space defined by the first through hole and the two mounting grooves, and the shaft sleeve is moved to the position where the grooves are located; the sleeve is rotated along an axis perpendicular to the center line of the second through hole so that the sleeve fits into the groove.
According to the assembly method of the bearing assembly, the assembly of the bearing and the shaft sleeve can be realized rapidly, the shaft sleeve can be mounted and fixed through the groove after being assembled to the groove of the bearing, and other connecting fixing pieces are not needed, so that the assembly program of the bearing assembly is simplified, and the assembly cost of the bearing assembly is reduced.
According to an embodiment of the present invention, a compressor includes: a housing; the compression mechanism is arranged in the shell and comprises a crankshaft; above-mentioned a bearing assembly for compressor, the bearing with the axle sleeve cover is established on the bent axle, the periphery wall of bearing with the casing is connected.
According to the compressor provided by the embodiment of the invention, the bearing and the shaft sleeve are arranged, the crankshaft can pass through the second through hole of the shaft sleeve, and the bearing and the shaft sleeve have supporting and limiting functions on the crankshaft, so that the relative swing of the crankshaft can be reduced, the working noise of the crankshaft is reduced, the working reliability of the crankshaft is improved, and the service life of the compressor is prolonged. In addition, the shaft sleeve is arranged in the groove of the bearing, and the bearing can support and limit the shaft sleeve without using other connecting fixing pieces, so that the structure of the bearing assembly is simplified, and the manufacturing and assembling cost of the bearing assembly is reduced.
According to some embodiments of the invention, the crankshaft has an outer diameter a, the sleeve has an inner diameter B, and the following are satisfied: a/2000 < B-A < A/300.
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 foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic structural view of a compressor according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of a bearing assembly for a compressor according to an embodiment of the present invention;
FIG. 3 is a top view of a bearing assembly for a compressor according to an embodiment of the present invention;
FIG. 4 is a cross-sectional view of a bearing assembly according to an embodiment of the present invention;
FIG. 5 is a top view of a bearing assembly according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a sleeve of a bearing assembly according to an embodiment of the present invention;
fig. 7 is a top view of a sleeve of a bearing assembly according to an embodiment of the present invention.
Reference numerals:
the compressor (1000) is operated by a compressor,
the bearing assembly 100 is configured such that,
bearing 1, boss 11, main body section 111, expansion section 112, annular section 12, first through hole 113, groove 114, mounting groove 115,
the sleeve 2, the second through hole 21,
crankshaft 200, housing 300.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "width," "upper," "lower," "left," "right," "top," "bottom," "inner," "outer," "axial," "circumferential," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
A bearing assembly 100 for a compressor 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 7.
As shown in fig. 1, a bearing assembly 100 for a compressor 1000 according to an embodiment of the present invention includes a bearing 1 and a sleeve 2.
As shown in fig. 1 and 2, the bearing 1 is provided with a first through hole 113 for the passage of the crankshaft 200 of the compressor 1000, and the inner peripheral wall of the bearing 1 is provided with a groove 114 extending in a ring shape in the circumferential direction thereof, and the contour line of the bottom wall of the groove 114 is arc-shaped in a longitudinal section passing through the central axis of the first through hole 113.
In the related art, an upper bearing and a lower bearing are arranged near the bottom of a crankshaft, the upper bearing and the lower bearing have supporting and limiting functions on the bottom of the crankshaft, a motor rotor and a motor stator are arranged near the top of the crankshaft, and the crankshaft rotates under the action of electromagnetic force between the stator and the rotor. It can be appreciated that vibration or swing easily occurs at the top of the crankshaft under the action of electromagnetic force, and in the present invention, by arranging the bearing assembly 100, the bearing assembly 100 can apply a supporting force opposite to the acting direction of electromagnetic force to the crankshaft 200, so as to further limit the crankshaft 200, thereby improving the operational reliability of the crankshaft 200.
As shown in fig. 1, 2 and 7, the sleeve 2 has a second through hole 21 for the crankshaft 200 to pass through, the sleeve 2 is located in the groove 114, and on a longitudinal section through the center axis of the second through hole 21, the outline of the outer peripheral wall of the sleeve 2 is arc-shaped to fit the outline of the bottom wall of the groove 114, and the sleeve 2 is rotatable in the groove 114 along an axis perpendicular to the center line of the first through hole 113.
Thus, the shaft sleeve 2 cooperates with the bearing 1 to support and limit the crankshaft 200. The friction loss between the bearing 1 and the crankshaft 200 can be reduced by arranging the shaft sleeve 2, and the reliability and the service life of the bearing 1 are improved. In addition, the bearing 1 is further internally provided with a groove 114, and the groove 114 has the functions of limiting and fixing the shaft sleeve 2, so that other connecting and fixing pieces are not required to be used when the shaft sleeve 2 is assembled, the structure of the bearing assembly 100 is simplified, and the manufacturing and assembling cost of the bearing assembly 100 is reduced. Alternatively, the sleeve 2 may be an iron casting or a low carbon steel after carburization, nitriding or carbonitriding.
According to the bearing assembly 100 for the compressor 1000 of the embodiment of the invention, by arranging the bearing 1 and the shaft sleeve 2, the crankshaft 200 can pass through the second through hole 21 of the shaft sleeve 2, and the bearing 1 and the shaft sleeve 2 have supporting and limiting functions on the crankshaft 200, so that the relative swing of the crankshaft 200 can be reduced, the working noise of the crankshaft 200 can be reduced, the working reliability of the crankshaft 200 can be improved, and the service life of the compressor 1000 can be prolonged. In addition, the shaft sleeve 2 is arranged in the groove 114 of the bearing 1, and the bearing 1 can support and limit the shaft sleeve 2 without using other connecting fixing pieces, so that the structure of the bearing assembly 100 is simplified, and the manufacturing and assembling cost of the bearing assembly 100 is reduced.
According to some embodiments of the present invention, as shown in fig. 2, 4 and 6, the outer peripheral wall of the sleeve 2 is in clearance fit with the inner peripheral wall of the groove 114. In other words, the outer peripheral wall of the sleeve 2 has a smaller size than the inner peripheral wall of the recess 114. Thereby, the shaft sleeve 2 is convenient to be assembled into the groove 114, so that the difficulty in assembling the shaft sleeve 2 is reduced, and the assembling efficiency of the shaft sleeve 2 is improved.
According to some embodiments of the present invention, as shown in fig. 1, 4 and 6, the diameter of the circle in which the contour line of the bottom wall of the recess 114 is located is D (diameter D shown in fig. 4) on the longitudinal section passing through the central axis of the first through hole 113, the diameter of the circle in which the contour line of the outer peripheral wall of the boss 2 is located is D (diameter D shown in fig. 4) on the longitudinal section passing through the central axis of the second through hole 21, and it is satisfied that: 5um < D-D < 140um.
Therefore, on one hand, the assembly difficulty of the shaft sleeve 2 can be reduced, and the assembly efficiency of the shaft sleeve 2 is improved; on the other hand, after the sleeve 2 is assembled to the groove 114, vibration or displacement between the sleeve 2 and the bearing 1 can be reduced, and the supporting and limiting effects of the sleeve 2 and the bearing 1 on the crankshaft 200 can be improved. Optionally, the difference between the diameter D of the circle on which the contour line of the bottom wall of the groove 114 is located and the diameter D of the circle on which the contour line of the outer peripheral wall of the sleeve 2 is located is 10um, 80um, 90um, 100um, 110um, 120um or 130um.
Further, as shown in fig. 1, 4 and 6, the diameter of the circle in which the contour line of the bottom wall of the recess 114 is located is D in the longitudinal section passing through the central axis of the first through hole 113, and the diameter of the circle in which the contour line of the outer peripheral wall of the boss 2 is located in the longitudinal section passing through the central axis of the second through hole 21 is D, and satisfies: 10um < D-D < 80um.
Therefore, on one hand, the assembly difficulty of the shaft sleeve 2 can be further reduced, and the assembly efficiency of the shaft sleeve 2 is improved; on the other hand, after the sleeve 2 is assembled to the groove 114, vibration or displacement between the sleeve 2 and the bearing 1 can be further reduced, and the supporting and limiting effects of the sleeve 2 and the bearing 1 on the crankshaft 200 can be improved. Optionally, the difference between the diameter D of the circle in which the contour line of the bottom wall of the groove 114 is located and the diameter D of the circle in which the contour line of the outer peripheral wall of the sleeve 2 is located is 20um, 30um, 40um, 50um, 60um or 70um.
According to some embodiments of the present invention, as shown in fig. 2, 5 and 6, a mounting groove 115 extending in the axial direction thereof is provided on the inner peripheral wall of the bearing 1, one end (upper end as shown in fig. 2) of the mounting groove 115 extends to an end face (upper end as shown in fig. 2) of one axial end of the bearing 1, and the other end of the mounting groove 115 extends to an inner wall face of the groove 114 to communicate with the groove 114. Thus, the mounting groove 115 provides a relief space for the installation of the sleeve 2, so that the sleeve 2 can be fitted into the groove 114 through the mounting groove 115.
Further, as shown in fig. 5 and 6, there are two mounting grooves 115, and the two mounting grooves 115 are center-symmetrical with respect to the center line of the first through hole 113. It can be appreciated that the two mounting grooves 115 which are centrally symmetrical with respect to the center line of the first through hole 113 are all communicated with the groove 114, so that a larger avoiding space can be formed, and the collision between the shaft sleeve 2 and the mounting groove 115 or the groove 114 during the assembly of the shaft sleeve 2 can be avoided during the assembly of the shaft sleeve 2, thereby reducing the assembly difficulty of the shaft sleeve 2 and improving the assembly efficiency.
When the sleeve 2 is assembled with the bearing 1, first, the sleeve 2 is moved to a position opposite to the first through hole 113, and the center line of the second through hole 21 of the sleeve 2 is ensured to be perpendicular to the center line of the second through hole 21; next, the boss 2 is rotated along the center line of the first through hole 113 so that the center line of the second through hole 21 is parallel to the line connecting the midpoints of the bottom walls of the mounting grooves 115; then, the boss 2 is inserted into the groove 114 from the space defined by the first through hole 113 and the mounting groove 115; finally, the shaft sleeve 2 is assembled with the bearing 1 by rotating along an axis perpendicular to the center line of the second through hole 21 such that the center line of the first through hole 113 coincides with the center line of the second through hole 21.
In some embodiments of the present invention, as shown in fig. 2, 4 and 6, the depth of the mounting groove 115 is equal to or greater than the maximum depth of the groove 114. It is understood that by setting the depth of the mounting groove 115 to be equal to or greater than the maximum depth of the recess 114, interference between the bottom wall of the mounting groove 115 and the boss 2 can be avoided during the assembling process of the boss, thereby improving the smoothness of the assembling of the boss 2.
In some embodiments of the present invention, as shown in FIG. 5, the bottom wall of the mounting groove 115 is planar. The processing difficulty of the plane is small, and the processing precision is high. In addition, the bottom wall of the mounting groove 115 is provided as a plane, so that the processing period of the mounting groove 115 can be shortened, and the processing cost of the mounting groove 115 can be reduced.
In some embodiments of the present invention, the bottom wall of the mounting groove 115 is arcuate. Therefore, the contour line of the bottom wall of the mounting groove 115 can be the same as the contour line of the outer peripheral wall of the shaft sleeve 2, and the bottom wall of the mounting groove 115 can be avoided from the shaft sleeve 2 when the shaft sleeve 2 is assembled, so that the smoothness of the assembly process of the shaft sleeve 2 can be ensured.
In some embodiments of the present invention, as shown in fig. 2, 5 and 6, the width of the mounting groove 115 is W (W shown in fig. 5), the height of the sleeve 2 is H1 (H1 shown in fig. 6) along the axial direction of the bearing 1 (up and down direction shown in fig. 6), and satisfies: h1 is less than or equal to W. When the sleeve 2 is inserted into the groove 114 in the space defined by the first through hole 113 and the mounting groove 115, the line connecting the center line of the second through hole 21 of the sleeve 2 with the middle point of the bottom wall of the mounting groove 115 is perpendicular, and the height of the sleeve 2 is set smaller than the width of the mounting groove 115, so that the mounting groove 115 can provide a larger avoiding space, the sleeve 2 can pass through the mounting groove 115 to enter the groove 114, and smoothness of the assembly process of the sleeve 2 is ensured.
According to some embodiments of the present invention, as shown in fig. 2 and 4, in a longitudinal section through the central axis of the first through hole 113, the contour line of the bottom wall of the groove 114 is circular arc-shaped, and the contour line of the outer peripheral wall of the sleeve 2 is circular arc-shaped to fit the contour line of the bottom wall of the groove 114. Therefore, the structure of the groove 114 can be simplified, the manufacturing difficulty of the groove 114 can be reduced, the manufacturing period of the groove 114 can be shortened, and the manufacturing cost of the groove 114 can be reduced.
Further, as shown in fig. 2 and 4, in a longitudinal section passing through the central axis of the first through hole 113, a diameter of a circle where the outline of the bottom wall of the groove 114 is located is D, and in a cross section perpendicular to the central axis of the first through hole 113, a maximum diameter of the outer outline of the groove 114 is D1, and satisfies: d=d1. Therefore, the curvature radius of each position of the inner contour line of the groove 114 is equal, and the inner contour surface of the groove 114 can be formed as a part of the spherical surface, so that the manufacturing difficulty of the groove 114 is further reduced, the manufacturing period of the groove 114 is shortened, and the manufacturing cost of the groove 114 is reduced.
According to some embodiments of the present invention, as shown in fig. 1, 3 and 4, the bearing 1 includes a boss portion 11 and an annular portion 12, the boss portion 11 is provided with a first through hole 113 for a crankshaft 200 to pass therethrough, a groove 114 is provided on an inner peripheral wall of the boss portion 11, and the annular portion 12 is sleeved on one end (a lower end as shown in fig. 4) of the boss portion 11. The outer peripheral wall of the annular portion 12 may be connected to the inner wall surface of the casing of the compressor 1000, and the annular portion 12 is sleeved on the shaft sleeve portion 11, and by connecting and fixing the annular portion 12, fixing and limiting of the shaft sleeve portion 11 can be achieved, so that installation and fixing of the whole bearing 1 can be achieved.
Alternatively, as shown in fig. 1, 3 and 4, the boss portion 11 and the annular portion 12 are integrally formed. Therefore, the structure of the integrated forming not only can ensure the structural stability and the performance stability of the shaft sleeve part 11 and the annular part 12, but also is convenient to form and simple to manufacture, and omits redundant assembly parts and connecting procedures, so that the assembly efficiency of the shaft sleeve part 11 and the annular part 12 is greatly improved, the connection reliability of the shaft sleeve part 11 and the annular part 12 is ensured, and moreover, the integrated forming part has higher overall strength and stability and longer service life.
Further, as shown in fig. 1, 3 and 4, the groove 114 is near an end of the boss 11 away from the annular portion 12 (an upper end as shown in fig. 4). The structure of the bearing 1 can thereby be simplified. In addition, when the bearing 1 supports and limits the crankshaft 200, the crankshaft 200 also applies a reaction force to the bearing 1, the crankshaft 200 is disposed in the groove 114, such that the reaction force acts on the groove 114 in a concentrated manner, and by disposing the groove 114 at an end far away from the annular portion 12, the reaction force can be reduced when being transmitted toward the annular portion 12, and further the acting force between the annular portion 12 and the housing can be reduced, thereby improving the reliability of the operation of the bearing 1.
In some embodiments of the present invention, as shown in fig. 1, 2 and 4, the boss 11 includes a main body section 111 and an expansion section 112 connected to the main body section 111, a groove 114 is provided on an inner peripheral wall of the main body section 111, the ring-shaped portion 12 is sleeved on the expansion section 112, and a minimum cross-sectional area on the expansion section 112 is larger than a cross-sectional area of the main body section 111. Thus, the area of the mating surface of the boss 11 that mates with the crankshaft 200 can be reduced, the area of the finish curved surface of the boss 11 can be reduced, and the production efficiency can be improved.
In some embodiments of the present invention, as shown in fig. 2, 4 and 6, the width of the groove 114 is the same as the height of the main body section 111 in the axial direction of the first through hole 113 (up and down direction as shown in fig. 4). Therefore, the difficulty of manufacturing the groove 114 can be reduced, the manufacturing period of the groove 114 can be shortened, and the manufacturing cost of the groove 114 can be reduced.
A compressor 1000 according to an embodiment of the present invention is described below with reference to fig. 1 to 7.
As shown in fig. 1, a compressor 1000 according to an embodiment of the present invention includes: the compression mechanism is arranged in the shell 300 and comprises a crankshaft 200, a bearing 1 and a shaft sleeve 2 are sleeved on the crankshaft 200, and the outer peripheral wall of the bearing 1 is connected with the shell 300.
Specifically, the bearing 1 and the housing 300 may be welded or connected by a fastener, and the housing 300 has a function of connecting and fixing the bearing 1. By sleeving the bearing 1 and the sleeve 2 on the crankshaft 200, the supporting and limiting actions on the crankshaft 200 can be achieved.
For example, in the embodiment shown in fig. 1, the bearing assembly 100 is fitted over the crankshaft 200, and the bearing assembly 100 is mounted upside down, i.e., the boss portion 11 of the bearing 1 is located at the bottom of the annular portion 12 (the bottom as shown in fig. 1) when the assembly is completed.
According to the compressor 1000 of the embodiment of the invention, the crankshaft 200 can pass through the second through hole 21 of the shaft sleeve 2 by arranging the bearing 1 and the shaft sleeve 2, and the bearing 1 and the shaft sleeve 2 have supporting and limiting functions on the crankshaft 200, so that the relative swing of the crankshaft 200 can be reduced, the working noise of the crankshaft 200 is reduced, the working reliability of the crankshaft 200 is improved, and the service life of the compressor 1000 is prolonged. In addition, the shaft sleeve 2 is arranged in the groove 114 of the bearing 1, and the bearing 1 can support and limit the shaft sleeve 2 without using other connecting fixing pieces, so that the structure of the bearing assembly 100 is simplified, and the manufacturing and assembling cost of the bearing assembly 100 is reduced.
In some embodiments of the present invention, as shown in fig. 1, the inner peripheral wall of the sleeve 2 is clearance fitted with the outer peripheral wall of the crankshaft 200. In other words, the outer peripheral wall of the crankshaft 200 has a smaller size than the inner peripheral wall of the sleeve 2. Thereby, the crankshaft 200 is conveniently assembled into the second through hole 21 of the sleeve 2, thereby reducing the difficulty of assembling the crankshaft 200 and improving the assembling efficiency of the crankshaft 200. It should be noted that, during operation of the compressor 1000, the sleeve 2 is fixed, and the crankshaft 200 may rotate relative to the sleeve 2, and the inner peripheral wall of the sleeve 2 is in clearance fit with the outer peripheral wall of the crankshaft 200, so that smoothness of rotation of the crankshaft 200 may be ensured.
According to some embodiments of the present invention, as shown in fig. 1 and 6, the crankshaft 200 has an outer diameter a (diameter a shown in fig. 1), the sleeve 2 has an inner diameter B (diameter B shown in fig. 6), and the following are satisfied: a/2000 < B-A < A/300. Thereby, on the one hand, smoothness of rotation of the crankshaft 200 relative to the sleeve 2 can be ensured; on the other hand, the supporting and limiting effects of the shaft sleeve 2 on the crankshaft 200 can be guaranteed, and the operation reliability of the crankshaft 200 is improved.
A bearing assembly 100 and a compressor 1000 having the same according to an embodiment of the present invention are described below with reference to fig. 1 to 7. It is to be understood that the following description is exemplary only, and is intended to be illustrative of the invention and not to be construed as limiting the invention.
As shown in fig. 1, the compressor 1000 includes: the housing 300, the compression mechanism and the bearing assembly 100, the compression mechanism is disposed within the housing 300, and the compression mechanism includes the crankshaft 200. Further, the bearing assembly 100 includes a bearing 1 and a sleeve 2, the bearing 1 and the sleeve 2 are fitted over the crankshaft 200, and an outer circumferential wall of the bearing 1 is connected to the housing 300.
As shown in fig. 1 and 2, the bearing 1 includes a boss portion 11 and an annular portion 12, and the boss portion 11 is provided with a first through hole 113 for the crankshaft 200 to pass through. The sleeve portion 11 further comprises a main body section 111 and an expansion section 112 connected to the main body section 111, the annular portion 12 is sleeved on the expansion section 112, and the minimum cross-sectional area of the expansion section 112 is larger than the cross-sectional area of the main body section 111. The inner peripheral wall of the main body section 111 is provided with a groove 114 extending in a ring shape in the circumferential direction thereof, the groove 114 is near one end (an upper end as shown in fig. 1) of the boss 11 away from the ring-shaped portion 12, a contour line of a bottom wall of the groove 114 is circular arc-shaped in a longitudinal section passing through a center axis of the first through hole 113, and the boss 2 is rotatable in the groove 114 along an axis perpendicular to the center axis of the first through hole 113. Further, in the axial direction (up-down direction as shown in fig. 1) of the first through hole 113, the width of the groove 114 is the same as the height of the main body section 111.
As shown in fig. 1, 2 and 5, the inner peripheral wall of the bearing 1 is further provided with two mounting grooves 115 extending in the axial direction thereof, and the bottom wall of the mounting groove 115 is a plane. One end of the mounting groove 115 extends to an end face of one axial end of the bearing 1, the other end of the mounting groove 115 extends to an inner wall face of the groove 114 to communicate with the groove 114, and the two mounting grooves 115 are center-symmetrical with respect to a center line of the first through hole 113.
As shown in fig. 1, 5 and 6, the sleeve 2 has a second through hole 21 for the crankshaft 200 to pass through, the sleeve 2 is located in the groove 114, and the contour line of the outer peripheral wall of the sleeve 2 is circular arc-shaped to fit the contour line of the bottom wall of the groove 114 in a longitudinal section passing through the center axis of the second through hole 21. Along the axial direction of the bearing 1, the height of the sleeve 2 is H1, the width of the mounting groove 115 is W, and the following is satisfied: h1 is less than or equal to W.
As shown in fig. 1, 2, 4 and 6, the diameter of the circle in which the contour line of the outer peripheral wall of the boss 2 is located is D in the longitudinal section passing through the central axis of the second through hole 21, the diameter of the circle in which the contour line of the bottom wall of the groove 114 is located is D in the longitudinal section passing through the central axis of the first through hole 113, the outer peripheral wall of the boss 2 is clearance fit with the inner peripheral wall of the groove 114, and it is satisfied that: d-d=45 um, the maximum diameter of the outer profile of the groove 114 is D1 in a cross section perpendicular to the central axis of the first through hole 113, and satisfies: d=d1. In addition, the outer diameter of the crankshaft 200 is a, the inner diameter of the shaft sleeve 2 is B, the inner peripheral wall of the shaft sleeve 2 is in clearance fit with the outer peripheral wall of the crankshaft 200, and the following conditions are satisfied: a/2000 < B-A < A/300.
As shown in fig. 1, 2 and 5, when the sleeve 2 is assembled with the bearing 1, first, the sleeve 2 is moved to a position opposite to the first through hole 113, and the center line of the second through hole 21 of the sleeve 2 is ensured to be perpendicular to the center line of the second through hole 21; next, the boss 2 is rotated along the center line of the first through hole 113 so that the center line of the second through hole 21 is parallel to the line connecting the midpoints of the bottom walls of the mounting grooves 115; then, the boss 2 is inserted into the groove 114 from the space defined by the first through hole 113 and the mounting groove 115; finally, the shaft sleeve 2 is assembled with the bearing 1 by rotating along an axis perpendicular to the center line of the second through hole 21 such that the center line of the first through hole 113 coincides with the center line of the second through hole 21.
A method of assembling a bearing assembly 100 according to an embodiment of the present invention is described below with reference to fig. 1-7.
According to the assembling method of the bearing assembly 100 of the embodiment of the present invention, when the mounting groove 115 extending in the axial direction thereof is provided on the inner peripheral wall of the bearing 1, one end of the mounting groove 115 extends to the end face of the axial end of the bearing 1, the other end of the mounting groove 115 extends to the inner wall face of the groove 114 to communicate with the groove 114, the number of the mounting grooves 115 is two, and the two mounting grooves 115 are center-symmetrical with respect to the center line of the first through hole 113, the assembling method includes the following four steps:
step one: placing the sleeve 2 on one side of the bearing 1 in the axial direction such that the sleeve 2 is opposed to the first through hole 113 and such that the center line of the first through hole 113 is perpendicular to the center line of the second through hole 21;
step two: rotating the sleeve 2 along the center line of the first through hole 113 so that the center line of the second through hole 21 is perpendicular to the line connecting the midpoints of the bottom walls of the two mounting grooves 115;
step three: placing the sleeve 2 into the bearing 1 from the space defined by the first through hole 113 and the two mounting grooves 115, and moving the sleeve 2 to the position where the grooves 114 are located;
step four: the sleeve 2 is rotated along an axis perpendicular to the center line of the second through hole 21 so that the sleeve 2 is fitted into the groove 114.
According to the assembly method of the bearing assembly 100 of the embodiment of the invention, the assembly of the bearing 1 and the shaft sleeve 2 can be realized quickly, the shaft sleeve 2 can be installed and fixed through the groove 114 after being assembled to the groove 114 of the bearing 1, and other connecting and fixing pieces are not needed, so that the assembly procedure of the bearing assembly 100 is simplified, and the assembly cost of the bearing assembly 100 is reduced.
In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A bearing assembly for a compressor, comprising:
the bearing is provided with a first through hole for a crankshaft of the compressor to pass through, the inner peripheral wall of the bearing is provided with a groove which extends into a ring shape along the circumferential direction of the bearing, and the outline line of the bottom wall of the groove is arc-shaped on the longitudinal section passing through the central axis of the first through hole;
the shaft sleeve is provided with a second through hole for the crankshaft to pass through, the shaft sleeve is positioned in the groove, the outline of the peripheral wall of the shaft sleeve is arc-shaped matched with the outline of the bottom wall of the groove on the longitudinal section passing through the central axis of the second through hole, and the shaft sleeve can rotate in the groove along the axis perpendicular to the central line of the first through hole;
when the inner peripheral wall of the bearing is provided with the mounting groove extending along the axial direction of the mounting groove, one end of the mounting groove extends to the end face of one axial end of the bearing, the other end of the mounting groove extends to the inner wall face of the groove to be communicated with the groove, and the number of the mounting grooves is two, and when the two mounting grooves are symmetrical about the center line center of the first through hole, the assembly method comprises the following steps:
placing the shaft sleeve on one axial side of the bearing, enabling the shaft sleeve to be opposite to the first through hole, and enabling the center line of the first through hole to be perpendicular to the center line of the second through hole;
rotating the shaft sleeve along the central line of the first through hole to enable the central line of the second through hole to be perpendicular to the connecting line of the midpoints of the bottom walls of the two mounting grooves;
the shaft sleeve is placed into the bearing from the space defined by the first through hole and the two mounting grooves, and the shaft sleeve is moved to the position where the grooves are located;
the sleeve is rotated along an axis perpendicular to the center line of the second through hole so that the sleeve fits into the groove.
2. The bearing assembly for a compressor according to claim 1, wherein a diameter of a circle in which a contour line of a bottom wall of the recess is located is D in a longitudinal section passing through a central axis of the first through hole, and a diameter of a circle in which a contour line of an outer peripheral wall of the boss is located in a longitudinal section passing through a central axis of the second through hole is D, and satisfies: 5um < D-D < 140um.
3. The bearing assembly for a compressor according to claim 2, wherein a diameter of a circle in which a contour line of a bottom wall of the recess is located is D in a longitudinal section passing through a central axis of the first through hole, and a diameter of a circle in which a contour line of an outer peripheral wall of the boss is located in a longitudinal section passing through a central axis of the second through hole is D, and satisfies: 10um < D-D < 80um.
4. The bearing assembly for a compressor of claim 1, wherein a depth of the mounting groove is equal to or greater than a maximum depth of the groove.
5. The bearing assembly for a compressor of claim 1, wherein the mounting groove has a width W, the sleeve has a height H1 in an axial direction of the bearing, and: h1 is less than or equal to W.
6. The bearing assembly for a compressor according to claim 1, wherein a contour line of a bottom wall of the groove is circular arc-shaped, and a contour line of an outer peripheral wall of the sleeve is circular arc-shaped to be fitted with a contour line of a bottom wall of the groove, in a longitudinal section through a central axis of the first through hole.
7. The bearing assembly for a compressor according to claim 6, wherein a diameter of a circle in which a contour line of a bottom wall of the groove is located is D in a longitudinal section passing through a central axis of the first through hole, a maximum diameter of an outer contour of the groove is D1 in a cross section perpendicular to the central axis of the first through hole, and it is satisfied that: d=d1.
8. The bearing assembly for a compressor of claim 1, wherein the bearing comprises:
the shaft sleeve part is provided with the first through hole for the crankshaft to pass through, and the groove is formed in the inner peripheral wall of the shaft sleeve part;
the annular part is sleeved at one end of the shaft sleeve part.
9. The bearing assembly for a compressor of claim 8, wherein the groove is proximate an end of the boss portion remote from the annular portion.
10. The bearing assembly for a compressor of claim 8, wherein the bushing portion includes:
the groove is formed in the inner peripheral wall of the main body section;
and the expansion section is connected with the main body section, the annular part is sleeved on the expansion section, and the minimum cross-sectional area of the expansion section is larger than the cross-sectional area of the main body section.
11. The bearing assembly for a compressor of claim 10, wherein a width of the groove is the same as a height of the main body section in an axial direction of the first through hole.
12. A compressor, comprising:
a housing;
the compression mechanism is arranged in the shell and comprises a crankshaft;
the bearing assembly for a compressor according to any one of claims 1 to 11, wherein the bearing and the sleeve are fitted over the crankshaft, and an outer peripheral wall of the bearing is connected to the housing.
13. The compressor of claim 12, wherein the crankshaft has an outer diameter a and the sleeve has an inner diameter B, and wherein: a/2000 < B-A < A/300.
CN201810629243.XA 2018-06-19 2018-06-19 Bearing assembly for compressor, compressor and bearing assembly assembling method Active CN108662008B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810629243.XA CN108662008B (en) 2018-06-19 2018-06-19 Bearing assembly for compressor, compressor and bearing assembly assembling method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810629243.XA CN108662008B (en) 2018-06-19 2018-06-19 Bearing assembly for compressor, compressor and bearing assembly assembling method

Publications (2)

Publication Number Publication Date
CN108662008A CN108662008A (en) 2018-10-16
CN108662008B true CN108662008B (en) 2024-02-09

Family

ID=63774800

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810629243.XA Active CN108662008B (en) 2018-06-19 2018-06-19 Bearing assembly for compressor, compressor and bearing assembly assembling method

Country Status (1)

Country Link
CN (1) CN108662008B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113503258B (en) * 2021-08-26 2023-04-18 安徽美芝精密制造有限公司 Bearing of compressor, compressor and refrigeration equipment
CN118088450A (en) * 2024-04-24 2024-05-28 广东美芝制冷设备有限公司 Rotary compressor and refrigeration equipment

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137962A (en) * 1936-07-03 1938-11-22 Gen Motors Corp Refrigerating apparatus
US4137014A (en) * 1975-08-04 1979-01-30 Lennox Industries, Inc. Two speed compressor with rotor support structure
CN102220978A (en) * 2010-04-13 2011-10-19 Lg电子株式会社 Hermetic compressor
CN102261334A (en) * 2010-05-31 2011-11-30 Lg电子株式会社 Hermetic compressor
CN103237987A (en) * 2010-10-13 2013-08-07 东芝开利株式会社 Hermetically enclosed rotary compressor and refrigeration cycle device
CN105465170A (en) * 2015-12-11 2016-04-06 东方电气集团东方汽轮机有限公司 Uniform load sliding bearing
CN208330972U (en) * 2018-06-19 2019-01-04 广东美芝制冷设备有限公司 Bearing assembly for compressor and the compressor with it

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2137962A (en) * 1936-07-03 1938-11-22 Gen Motors Corp Refrigerating apparatus
US4137014A (en) * 1975-08-04 1979-01-30 Lennox Industries, Inc. Two speed compressor with rotor support structure
CN102220978A (en) * 2010-04-13 2011-10-19 Lg电子株式会社 Hermetic compressor
CN102261334A (en) * 2010-05-31 2011-11-30 Lg电子株式会社 Hermetic compressor
CN103237987A (en) * 2010-10-13 2013-08-07 东芝开利株式会社 Hermetically enclosed rotary compressor and refrigeration cycle device
CN105465170A (en) * 2015-12-11 2016-04-06 东方电气集团东方汽轮机有限公司 Uniform load sliding bearing
CN208330972U (en) * 2018-06-19 2019-01-04 广东美芝制冷设备有限公司 Bearing assembly for compressor and the compressor with it

Also Published As

Publication number Publication date
CN108662008A (en) 2018-10-16

Similar Documents

Publication Publication Date Title
CN108662008B (en) Bearing assembly for compressor, compressor and bearing assembly assembling method
JP4928978B2 (en) Electric compressor
US20070189892A1 (en) Axial flow fan and housing for the same
WO2014054236A1 (en) Motor
JP4460730B2 (en) Spindle motor
US20130156573A1 (en) Fan
CN108988555B (en) Ceiling fan motor
WO2016199822A1 (en) Rotary machine
CN218717499U (en) Cross slip ring component of scroll compressor and scroll compressor
CN208330972U (en) Bearing assembly for compressor and the compressor with it
JP2005233342A (en) Bearing device and scroll type fluid machine
WO2019111430A1 (en) Electric motor and electric fan
CN105526170A (en) Balancing weight of rotary compressor and double-cylinder double-stage compressor with balancing weight
CN110492634B (en) Rotor
CN109424515A (en) A kind of compressor and its manufacturing method
JP7017485B2 (en) Scroll compressor
KR101190065B1 (en) Scroll compressor and assembly method for scroll compressor
CN220060265U (en) Magnetic suspension bearing assembly, compressor and heating ventilation equipment
JP3073592U (en) Stator structure
CN216477858U (en) Eccentric shaft assembly, scroll compressor and air conditioner
JP6753792B2 (en) motor
US20230304496A1 (en) Scroll compressor
CN104081051A (en) Pump
CN212343518U (en) External rotor motor
JP3239642U (en) Structure of rotary motor

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant