CN105458224B - Compressor and manufacturing method of composite frame thereof - Google Patents
Compressor and manufacturing method of composite frame thereof Download PDFInfo
- Publication number
- CN105458224B CN105458224B CN201410432177.9A CN201410432177A CN105458224B CN 105458224 B CN105458224 B CN 105458224B CN 201410432177 A CN201410432177 A CN 201410432177A CN 105458224 B CN105458224 B CN 105458224B
- Authority
- CN
- China
- Prior art keywords
- bearing
- bushing
- lining
- compressor
- melting point
- 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
Links
- 239000002131 composite material Substances 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 239000000463 material Substances 0.000 claims abstract description 54
- 238000002844 melting Methods 0.000 claims abstract description 31
- 230000008018 melting Effects 0.000 claims abstract description 31
- 238000005266 casting Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims abstract description 21
- 238000001816 cooling Methods 0.000 claims abstract description 7
- 239000007787 solid Substances 0.000 claims abstract description 6
- 238000004663 powder metallurgy Methods 0.000 claims description 6
- 239000003507 refrigerant Substances 0.000 claims description 5
- 230000008093 supporting effect Effects 0.000 claims description 5
- 238000005245 sintering Methods 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 20
- 238000000465 moulding Methods 0.000 abstract description 3
- 238000005096 rolling process Methods 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
Images
Landscapes
- Compressor (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention provides a compressor and a manufacturing method of a composite frame thereof, wherein the manufacturing method at least comprises the following steps: a lining made into a solid cylinder or a circular ring; casting the outer peripheral surface of the lining to form a bearing, wherein the casting temperature is not lower than the material melting point of the bearing, and the material melting point of the bearing is not lower than the material melting point of the lining; and forming a composite frame blank having the bushing and the bearing after cooling. The bearing is cast and molded outside the bushing which is molded in advance skillfully, the casting and molding process of the bearing and the connecting process between the bushing and the bearing are combined into a whole, the bearing is cast and molded once, the implementation is easy, the process is simplified, the production efficiency is improved, the production cost is reduced, the connecting strength between the bushing and the bearing is strong, the bushing is not easy to loosen in the subsequent processing process, and the processing precision of the inner hole of the bushing is ensured.
Description
Technical Field
The invention belongs to the field of compressors, and relates to a compressor and a manufacturing method of a composite frame of the compressor.
Background
In general, a hermetic compressor includes a motor for generating a driving force in an inner space of a hermetic case, and a compression member coupled to the motor for compressing a refrigerant. The hermetic compressor may be classified into a reciprocating compressor, a scroll compressor, a rolling rotor compressor, etc. according to a refrigerant compression mechanism. The reciprocating compressor, the scroll compressor, and the rolling rotor compressor all use the rotational force of a motor.
For example, a conventional motor of a rolling rotor compressor using a rotational force has a single crankshaft, and the rotational force of the motor is transmitted to a compression member through the crankshaft. As shown in fig. 1, the basic structure of the rolling rotor type compressor is as follows:
the upper end and the lower end of the sealed shell 2 ' are respectively welded with an upper cover 1 ' and a lower cover 7 '. The motor 3 'is arranged in the sealed shell 2', and the motor 3 'comprises an inner rotor 32' and an outer stator 33 'sleeved on the crankshaft 31'. The outer stator 33 'is fixed to the hermetic shell 2'. The inner rotor 32 'is inserted into the outer stator 33' with a predetermined gap between the inner rotor 32 'and the outer stator 33', and the inner rotor 32 'is rotated by interaction with the outer stator 33'. A crankshaft 31 'is coupled to the inner rotor 32' to transmit the rotational force of the inner rotor 32 'to the compression part 5'.
The compressing member 5' may include: a cylinder, a rotary piston and vanes for isolating the high and low pressure chambers in the cylinder, and a plurality of bearings for defining a compression space together with the cylinder and supporting the crankshaft 31'.
Bearings are typically located on one side of the motor 3 ' to support the crankshaft 31 ', such as shown in fig. 1, the bearings being located on the underside of the motor 3 '; in the vertical type rolling rotor type compressor shown in fig. 1, the bearings include an upper bearing 4 'and a lower bearing 6' which are respectively provided at the upper and lower sides of the cylinder; the upper bearing 4 'is the main bearing and the lower bearing 6' is the secondary bearing.
The lower part of the crankshaft 31 'is positioned in the central axis of the sealed housing 2' by means of bearings (upper bearing 4 'and lower bearing 6'); the upper bearing 4 'forms a friction pair with the crankshaft 31' via an internal boss structure (the inner cylindrical structure in fig. 1).
As shown in fig. 1, in the rolling rotor type compressor, a manner in which bearings (an upper bearing 4 ' and a lower bearing 6 ') are directly contact-fitted with a crankshaft 31 ' is adopted, and the upper bearing 4 ' is welded with a hermetic shell 2 '. The inventor researches and finds that the structure of the prior art is difficult to meet the requirements of two aspects at the same time: on one hand, the bearing and the crankshaft form a friction pair, so that the meshing characteristics of the bearing and the crankshaft are required to be good, and the abrasion needs to meet relevant standards; on the other hand, the bearing needs to meet the welding requirement with the shell.
Furthermore, the inventors have found that this structure has the following disadvantages:
(1) the upper bearing 4 'and the crankshaft 31' are severely worn. Specifically, the micro compressor is limited in size, and the height of the upper bearing 4' is smaller than that of the general rotary compressor. The crankshaft 31 'is thinner, which results in increased surface pressure of the upper bearing 4', severe local working condition and serious abrasion. Further, in the case where the upper bearing 4 ' is improperly welded to the sealed housing 2 ', the axis of the crankshaft 31 ' may be inclined, and even a small inclination angle may cause wear to be concentrated between the upper bearing 4 ' and the crankshaft 31 '.
(2) The welding of the sealed housing 2 'with the upper cover 1' and the lower cover 7 'easily causes the deformation of the sealed housing 2'. Specifically, since the sealing case 2 ' is generally cylindrical, it is easily deformed by heat when welded to the upper cover 1 ' and the lower cover 7 ', which affects the overall airtightness of the compressor, and also causes an uneven gap between the rotor and the stator of the motor, which affects the overall coaxiality between the motor and the crankshaft, the bearing, the cylinder, etc., thereby reducing the operating efficiency and performance of the compressor.
(3) The gap between the inner rotor 32 'and the outer stator 33' is poor. Specifically, the conventional rolling rotor compressor has been unable to fundamentally solve the problem of poor stator-rotor clearance due to the influence of the component machining accuracy and the stator-rotor positioning reference. Because the upper bearing 4 ' is installed in the sealed housing 2 ', the coaxiality between the bearing surface of the upper bearing 4 ' and the inner wall of the sealed housing 2 ' is difficult to ensure, and the processing difficulty of the upper bearing 4 ' is extremely high. The outer stator 33 'is positioned based on the sealed housing 2'; the inner rotor 32 'is positioned based on the crankshaft 31', and the crankshaft 31 'is positioned based on the upper bearing 4', so when the coaxiality between the upper bearing 4 'and the sealing housing 2' is not up to standard, the gap between the inner rotor 32 'and the outer stator 33' becomes poor, even abrasion between the inner rotor 32 'and the outer stator 33' is caused, the service life of the motor is shortened, and a lot of noise is generated.
Disclosure of Invention
The invention aims to provide a compressor and a manufacturing method of a composite frame of the compressor, which can meet the abrasion requirement of a friction pair formed by a bearing and a crankshaft, can meet the welding requirement of the bearing and a shell cover, and simultaneously reduce the processing difficulty.
The invention further improves the matching connection between the bush and the bearing, wherein the manufacturing method is easy to implement, and ensures the connection strength between the bush and the bearing, thereby ensuring the precision of the subsequent processing of the inner circle of the bush.
The invention provides a manufacturing method of a compressor composite frame, which at least comprises the following steps: a lining made into a solid cylinder or a circular ring; casting the outer peripheral surface of the lining to form a bearing, wherein the casting temperature is not lower than the material melting point of the bearing, and the material melting point of the bearing is not lower than the material melting point of the lining; and forming a composite frame blank having the bushing and the bearing after cooling.
Preferably, the lining is sintered by powder metallurgy, and the casting temperature and the melting point of the material of the bearing are both more than 1500 ℃.
Preferably, the material of the bushing is more wear resistant and/or has a lower coefficient of friction than the material of the bearing, and the material of the bearing is more easily welded to the shell of the compressor than the material of the bushing.
Preferably, the bearing has a disc portion and an outer rim upper section and an outer rim lower section extending vertically on an outer periphery of the disc portion, respectively, and the manufacturing method further includes: and further processing the composite frame blank, wherein the inner hole of the bush is coaxial with the inner circumference of the upper section of the outer edge part of the bearing.
Preferably, a concave-convex mosaic structure is formed between the inner circumferential surface of the bearing and the outer circumferential surface of the bushing.
Another aspect of the present invention provides a compressor, which includes a housing, an upper motor received in the housing, a lower cylinder received in the housing, and a crankshaft for transmitting a rotational force of the motor to the cylinder to compress a refrigerant; the compressor further includes: a composite frame positioned between the motor and the cylinder for supporting the crankshaft, the composite frame being a portion of the housing and being welded integrally with the remainder of the housing, the composite frame further comprising: solid cylindrical or annular bushings; and a bearing cast on the outer peripheral surface of the bush; and the melting point of the material of the bearing is not lower than that of the material of the lining.
Preferably, the lining is sintered by powder metallurgy, and the casting temperature and the melting point of the material of the bearing are both more than 1500 ℃.
Preferably, the material of the bushing is more wear resistant and/or has a lower coefficient of friction than the material of the bearing, and the material of the bearing is more easily welded to the shell of the compressor than the material of the bushing.
Preferably, the bearing has a disc portion, and an outer edge upper section and an outer edge lower section extending vertically on an outer periphery of the disc portion, respectively, and the inner hole of the bush is coaxial with an inner circumference of the outer edge upper section of the bearing.
Preferably, a concave-convex mosaic structure is formed between the inner circumferential surface of the bearing and the outer circumferential surface of the bushing.
Compared with the prior art, the manufacturing method of the compressor composite frame has the advantages that in the process of casting the bearing, the outer peripheral surface of the bushing is partially melted and is fused with the combined part of the bearing, the bushing and the bearing are tightly connected after cooling, the casting and forming process of the bearing and the connecting process between the bushing and the bearing are combined into a whole, the one-step casting and forming are realized, the implementation is easy, the process is simplified, the production efficiency is improved, and the production cost is reduced.
The compressor composite frame manufactured by the manufacturing method of the compressor composite frame has strong connecting strength between the bushing and the bearing, the bushing is not easy to loosen in the subsequent processing process, and the processing precision of the inner hole of the bushing is ensured.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a cross-sectional view of a prior art compressor;
fig. 2 is a sectional view of a compressor according to a first embodiment of the present invention;
fig. 3 is a sectional view of a composite frame of a compressor according to a first embodiment of the present invention;
fig. 4 is a sectional view of a composite frame of a compressor according to a second embodiment of the present invention;
fig. 5 is a sectional view of a composite frame of a compressor according to a third embodiment of the present invention.
Detailed Description
Hereinafter, a detailed description will be given of embodiments of the present invention. While the invention will be described and illustrated in connection with certain specific embodiments thereof, it should be understood that the invention is not limited to those embodiments. Rather, modifications and equivalents of the invention are intended to be included within the scope of the claims.
Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without these specific details. In other instances, well-known structures and components are not shown in detail in order not to obscure the subject matter of the invention.
First embodiment
As shown in fig. 2, the vertical compressor of the present embodiment includes: the bearing comprises a housing 1, a motor 2, a cylinder 3, a crankshaft 4, a first bearing assembly and a second bearing assembly.
The motor 2 is accommodated in an upper space within the housing 1. The cylinder 3 is accommodated in a lower space within the housing 1. The crankshaft 4 has a long shaft portion located at an upper side of the cylinder 3, an eccentric portion located inside the cylinder 3, and a short shaft portion located at a lower side of the cylinder 3, and the crankshaft 4 transmits a rotational force of the motor 2 to the cylinder 3 to compress the refrigerant. The first bearing assembly and the second bearing assembly are respectively disposed at upper and lower sides of the cylinder 3, define a compression space together with the cylinder 3, and support the crankshaft 4. The first bearing assembly comprises a composite frame 5 located between the motor 2 and the cylinder 3 as part of the housing 1 and welded integrally with the remainder of the housing 1, the composite frame 5 comprising at least a main bearing 51 (i.e. an upper bearing). The second bearing assembly comprises at least a secondary bearing 6 (i.e. a lower bearing).
As shown in fig. 2 and 3, the composite chassis 5 includes: an annular bush 52 having an inner hole, and a main bearing 51 cast on an outer peripheral surface of the bush 52. The casting temperature is not lower than the melting point of the material of the main bearing 51, and the melting point of the material of the main bearing 51 is higher than the melting point of the material of the bushing 52.
As shown in fig. 3, the connection between the bush 52 and the main bearing 51 has a concave-convex mosaic structure, that is, the main bearing 51 slightly protrudes and is embedded into the outer peripheral surface part of the bush 52, so as to form a fusion part 53 between the two, and a relatively tight connection is formed between the main bearing 51 and the bush 52.
The long shaft of the crankshaft 4 passes through the inner hole of the bushing 52, so that a pair of friction pairs is formed by the inner hole of the bushing 52 and the crankshaft 4.
As shown in fig. 3, the main bearing 51 includes a disk portion 511 having a through hole, an inner edge portion 510 projecting upward from the inner periphery of the disk portion 511, and an outer edge portion 512 extending upward and downward from the outer edge of the disk portion 21, the outer edge portion including an outer edge portion upper section 5121 and an outer edge portion lower section 5122, and the main bearing 51 has an H-shaped central cross section as a whole. Thus, the inner circumferential surface of the through hole of the main bearing 51 is constituted by the inner circumferential surface of the disk portion 511 and the inner circumferential surface of the inner edge portion 510. The height of the bush 52 is larger than the height of the through hole (i.e., the sum of the thicknesses of the disc portion 511 and the inner peripheral portion 510).
In the present embodiment, the outer edge portion 512 of the main bearing 51 is integrally welded to the remaining portion of the casing 1 as a part of the casing 1. That is, the casing 1 is mainly composed of the outer edge 512, the upper cover and the lower cover, the upper cover of the casing 1 is connected to the outer edge upper stage 5121, and the lower cover of the casing 1 is connected to the outer edge lower stage 5122. The main bearing 51 with the outer edge part 512 in the embodiment is taken as an integrated frame to replace a plurality of parts such as a middle shell, a main bearing and the like in the prior art, so that the structure is simplified, the integral assembly precision of the compressor is improved, and the problem of stator and rotor clearance which puzzles the industry for years is fundamentally solved.
The outer stator of the motor 2 may be directly fixed to the inner circumferential surface of the outer edge portion upper section 5121 of the main bearing 51 (for example, a third shoulder (not shown) may be provided on the inner circumferential surface). Like this, because the inner peripheral surface of outer fringe portion upper segment 5121 is as the location benchmark of motor outer stator, the hole of bush 52 is as the location benchmark of motor inner rotor, need through the outer fringe portion further processing to the bearing for the inner peripheral surface of outer fringe portion upper segment 5121 of main bearing 51 is coaxial with the hole of bush 52, thereby can guarantee that inner rotor and outer stator are coaxial, reaches splendid clearance fit effect between the two, and then reduces wearing and tearing and noise.
The present invention is based on the research that the main bearing 51 in the compressor is seriously worn, and a bush 52 is inserted between the main bearing 51 and the crankshaft 4 by changing the structure of the main bearing 51, and a pair of friction pairs is formed by the inner hole of the bush 52 and the crankshaft 4.
On the one hand, in the compressor composite frame 5 of the embodiment, the through hole of the main bearing 51 is not directly matched with the crankshaft 4, so that the requirement on the processing precision of the inner surface of the main bearing 51 can be reduced, the processing of the inner surface of the main bearing 51 is allowed to have errors to a certain extent, the defective rate of products is greatly reduced, and the production efficiency is improved.
On the other hand, the materials of the main bearing 51 and the bush 52 can be more flexibly selected to realize their respective functions. In the embodiment of the invention, when the material of the bush 52 is selected, the material of the bush 52 is more wear-resistant and/or has a smaller friction coefficient than the material of the main bearing 51, and the friction pair formed by the bush 52 and the crankshaft 4 has good meshing characteristic and small abrasion, and can meet the relevant standards; when the material of the main bearing 51 is selected, the material of the main bearing 51 is easier to weld with the shell 1 of the compressor than the material of the bushing 52, so that the welded seam meets the process requirements. The material of the parts is flexibly selected, so that the cost of the product can be better controlled.
Regarding the material of the main bearing 51 and the bush 52, the two materials are different, the casting temperature is not lower than the melting point of the material of the main bearing 51, and the melting point of the material of the main bearing 51 is not lower than the melting point of the material of the bush 52.
In order to better achieve the mechanical properties of supporting the crankshaft 4 and the welding with the shell 1, the main bearing 51 may be made of a bearing steel having good supporting properties and being easily welded with the shell 1. In the present embodiment, the case 1 is made of low carbon steel, such as 20# steel; the main bearing 51 is made of low carbon steel, such as 20# steel, and has a melting point of about 1560-1580 ℃.
The bushing 52 may be made of a material having good wear resistance and a smaller friction coefficient, so as to form a friction pair with the crankshaft 4. In this embodiment, the liner 52 is made of powder metallurgy and has a melting point of about 1500 degrees Celsius.
As described above, the main bearing 51 and the bush 52 are made of different materials to achieve different functions, so that the fitting connection between the main bearing 51 and the bush 52 is difficult. The prior art interference cold press fit creates problems, for example,
(1) the strength of the bonding portion is insufficient. The small interference magnitude is adopted for cold pressing, the binding force between the rack and the lining is small, after press fit, the lining is easy to loosen during subsequent processing of the inner circle of the lining, and the precision of the inner circle of the lining cannot be guaranteed. If a larger interference magnitude is adopted, the powder metallurgy lining is brittle and is easy to break during cold pressing; (2) the cost is large. The two matching surfaces of the frame and the lining sleeve need finish machining to control the interference magnitude of the frame and the lining sleeve, and higher machining cost is needed; cold pressing equipment and manpower are required to be added, and a cold pressing procedure is added; (3) the process is complex and is finished and assembled for many times.
Based on this, the present invention skillfully adopts one-step casting molding to complete the molding of the main bearing 51 and the connection with the bushing 52.
The method of manufacturing the composite chassis 5 of the present embodiment will be further described below.
The manufacturing method of the composite frame 5 of the compressor of the embodiment at least comprises the following steps: forming the liner 52 as a solid cylinder or ring; casting the outer peripheral surface of the bush 52 to form a main bearing 51, wherein the casting temperature is not lower than the material melting point of the main bearing 51, and the material melting point of the main bearing 51 is not lower than the material melting point of the bush 52; after cooling, a composite frame blank with bushings 52 and main bearings 51 is formed.
In order to ensure a good gap between the stator and the rotor of the motor, the composite frame blank is further processed so that the inner hole of the bushing 52 is coaxial with the inner circumference of the upper section of the outer edge of the main bearing 51. Preferably, in order to reduce the difficulty of the coaxiality machining, the two parts of the bushing 52 and the main bearing 51 can be additionally positioned to ensure the coaxiality in the casting process.
In this embodiment, the casting temperature is about 1560-1580 degrees Celsius, which is substantially equal to the melting point of the material of the main bearing 51 and higher than the melting point of the material of the bushing 52. Therefore, in the process of casting the main bearing 51 at the outer peripheral surface of the bush 52, the outer peripheral surface of the bush 52 is partially melted and fused with the joining portion of the main bearing 51, and the fused portion 53 is cooled and solidified to connect the main bearing 51 and the bush 52; the main bearing 51 may be slightly inserted into the outer peripheral surface of the bush 52 so that the two are connected to each other firmly. It can be seen that in this manufacturing method, the joint surface of the bush 52 and the main bearing 51 does not need to be finished before assembling the two, and the fastening connection between the bush 52 and the main bearing 51 is completed while the main bearing 51 is cast.
It is generally directly believed to one skilled in the art that three processes are used to fabricate main bearing 51, fabricate bush 52, and then weld bush 52 to main bearing 51, or fit bush 52 to the through hole of bearing 51. The invention changes the conventional procedure of welding or assembling the bushing and the bearing which are separately molded, skillfully casts the bearing outside the bushing which is molded firstly, simplifies the process, is easy to implement, improves the generation efficiency and reduces the production cost.
In the composite frame 5 manufactured by the method, the fusion part 53 between the bushing 52 and the main bearing 51 has stronger connection strength after cooling, and the inner hole of the bushing 52 is not easy to loosen in the subsequent processing process, so that the processing precision of the inner hole of the bushing 52 is ensured.
Second embodiment
In a modification shown in fig. 4, unlike the first embodiment, the main bearing 51a includes a disk portion 511a having a through hole and an outer edge portion 512a extending vertically from an outer edge of the disk portion 511a, and the main bearing 51a has an H-shaped central cross section as a whole. The height of the bush 52a fitted to the main bearing 51a is larger than the thickness of the disk portion 511 a. In this embodiment, the inner peripheral portion 510 of the main bearing 51 in the first embodiment is eliminated, and the processing becomes easier.
Third embodiment
In another modification shown in fig. 5, unlike the first embodiment, the inner rim portion 510b of the main bearing 511b is a cylinder formed to protrude upward from the inner periphery of the disc portion 511. The inner peripheral surface of the through hole of the main bearing 511b is formed by the inner peripheral surface of the disk portion 511b and the inner peripheral surface of the inner edge portion 510 b. The height of the bush 52b is equal to the height of the through-hole of the main bearing 511b (i.e., the sum of the thicknesses of the circular disk portion 511b and the inner peripheral portion 510 b), so that the inner peripheral surface of the through-hole of the main bearing 511b can better support the bush 52 b.
In another variation (not shown) of the first, second, and third embodiments, the secondary bearing assembly may also be in the form of a composite frame, comprising: the casting temperature is not lower than the material melting point of the main bearing, and the material melting point of the main bearing is not lower than the material melting point of the bushing.
The above-mentioned embodiment of the present invention is exemplified by a vertical compressor, but is not limited thereto, and may be a compressor of other layout type, for example, a horizontal compressor.
In summary, according to the manufacturing method of the compressor composite frame, in the process of casting the bearing, the outer peripheral surface of the bushing is partially melted and is fused with the combined part of the bearing, and the bushing and the bearing are tightly connected through cooling, so that the casting and forming process of the bearing and the connecting process between the bushing and the bearing are combined into a whole, the one-step casting and forming is realized, the implementation is easy, the process is simplified, the production efficiency is improved, and the production cost is reduced. The compressor composite frame manufactured by the invention has stronger connecting strength between the bushing and the bearing, and the bushing is not easy to loosen in the subsequent processing process, thereby ensuring the processing precision of the inner hole of the bushing.
Claims (4)
1. A method for manufacturing a composite frame of a compressor, characterized in that the method at least comprises the following steps:
a lining made into a solid cylinder or a circular ring;
casting the outer peripheral surface of the lining to form a bearing, wherein the casting temperature is not lower than the material melting point of the bearing, and the material melting point of the bearing is not lower than the material melting point of the lining; and
forming a composite frame blank having the bushing and the bearing after cooling;
the lining is formed by powder metallurgy sintering, the casting temperature and the material melting point of the bearing are both more than 1500 ℃, and a concave-convex mosaic structure is formed between the inner circumferential surface of the bearing and the outer circumferential surface of the lining;
the bearing has a disk portion, and an outer rim upper section and an outer rim lower section that extend vertically on the outer periphery of the disk portion, respectively, and the manufacturing method further includes: and further processing the composite frame blank to enable the inner hole of the bush to be coaxial with the inner circumference of the upper section of the outer edge part of the bearing.
2. The method of claim 1, wherein the bushing is more wear resistant and/or has a lower coefficient of friction than the bearing, and wherein the bearing is more easily welded to the compressor shell than the bushing.
3. A compressor, comprising: a housing, a motor disposed at an upper portion of the housing, a cylinder disposed at a lower portion of the housing, and a crank shaft for transmitting a rotational force of the motor to the cylinder to compress a refrigerant,
the compressor further includes: a composite frame positioned between the motor and the cylinder for supporting the crankshaft, the composite frame being a part of the housing and welded integrally with the rest of the housing,
the composite frame further comprises:
solid cylindrical or annular bushings; and
a bearing cast on an outer circumferential surface of the bush;
the material melting point of the bearing is not lower than that of the lining;
the lining is formed by powder metallurgy sintering, the casting temperature and the material melting point of the bearing are both more than 1500 ℃, and a concave-convex mosaic structure is formed between the inner circumferential surface of the bearing and the outer circumferential surface of the lining;
the bearing is provided with a disc part, an outer edge part upper section and an outer edge part lower section, wherein the outer edge part upper section and the outer edge part lower section respectively extend up and down on the periphery of the disc part, and an inner hole of the lining is coaxial with an inner circumference of the outer edge part upper section of the bearing.
4. A compressor according to claim 3, wherein the bushing is made of a material which is more wear resistant and/or has a lower coefficient of friction than the material of the bearing, and the material of the bearing is more easily weldable to the compressor shell than the material of the bushing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432177.9A CN105458224B (en) | 2014-08-28 | 2014-08-28 | Compressor and manufacturing method of composite frame thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410432177.9A CN105458224B (en) | 2014-08-28 | 2014-08-28 | Compressor and manufacturing method of composite frame thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105458224A CN105458224A (en) | 2016-04-06 |
| CN105458224B true CN105458224B (en) | 2020-02-21 |
Family
ID=55596629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410432177.9A Active CN105458224B (en) | 2014-08-28 | 2014-08-28 | Compressor and manufacturing method of composite frame thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105458224B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594444A (en) * | 2020-05-21 | 2020-08-28 | 黄石东贝电器股份有限公司 | Vertical rotary compressor |
| CN113803254B (en) * | 2021-08-30 | 2022-07-08 | 广州市德善数控科技有限公司 | Compressor and method of making the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106682A (en) * | 1986-10-11 | 1988-04-20 | 机械工业部沈阳铸造研究所 | White cast iron and cast steel bimetal composite casting |
| CN2549251Y (en) * | 2002-05-10 | 2003-05-07 | 余世界 | Precisive shaped bimetal bush bearing lining sleeve with lubricant concaves |
| CN201531426U (en) * | 2009-11-24 | 2010-07-21 | 沈阳华润三洋压缩机有限公司 | Compressor bearing |
| CN102029379A (en) * | 2009-09-29 | 2011-04-27 | 淄博君合专利技术开发有限公司 | Bimetallic combined machining method |
| CN102062099A (en) * | 2011-02-12 | 2011-05-18 | 沈阳华润三洋压缩机有限公司 | Rotary type compressor |
| CN202187919U (en) * | 2011-07-25 | 2012-04-11 | 安徽美芝精密制造有限公司 | Rotary type compressor |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102477984B (en) * | 2010-11-26 | 2015-05-27 | 上海日立电器有限公司 | Rotary compressor structure with uniform stator and rotor clearance |
-
2014
- 2014-08-28 CN CN201410432177.9A patent/CN105458224B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86106682A (en) * | 1986-10-11 | 1988-04-20 | 机械工业部沈阳铸造研究所 | White cast iron and cast steel bimetal composite casting |
| CN2549251Y (en) * | 2002-05-10 | 2003-05-07 | 余世界 | Precisive shaped bimetal bush bearing lining sleeve with lubricant concaves |
| CN102029379A (en) * | 2009-09-29 | 2011-04-27 | 淄博君合专利技术开发有限公司 | Bimetallic combined machining method |
| CN201531426U (en) * | 2009-11-24 | 2010-07-21 | 沈阳华润三洋压缩机有限公司 | Compressor bearing |
| CN102062099A (en) * | 2011-02-12 | 2011-05-18 | 沈阳华润三洋压缩机有限公司 | Rotary type compressor |
| CN202187919U (en) * | 2011-07-25 | 2012-04-11 | 安徽美芝精密制造有限公司 | Rotary type compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105458224A (en) | 2016-04-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105370537B (en) | A kind of manufacturing method of compressor and its compound rack | |
| US10982672B2 (en) | High-strength light-weight lattice-cored additive manufactured compressor components | |
| CN105458224B (en) | Compressor and manufacturing method of composite frame thereof | |
| CN105156328A (en) | Rotary compressor | |
| CN205977684U (en) | Compressor and cylinder | |
| CN109424515B (en) | Compressor and manufacturing method thereof | |
| CN208221100U (en) | Multi-cylinder rotation compressor | |
| CN202579195U (en) | Rotary fluid machine | |
| CN103270307B (en) | There is the scroll compressor of split type fixed eddy plate | |
| CN204041393U (en) | A kind of compressor and compound frame thereof | |
| US20130020770A1 (en) | Brush seal | |
| CN105221388A (en) | There is the compressor of external rotor electric machine | |
| CN104533756A (en) | Air compressor crankshaft and manufacturing process thereof | |
| CN105370577A (en) | Compressor | |
| CN107218223A (en) | Rotary compressor | |
| CN206972542U (en) | Rotary compressor | |
| CN105927539A (en) | Multi-cylinder rotary compressor | |
| CN101205921A (en) | Crank axle of enclosed type compressor and manufacturing method thereof | |
| CN105570183A (en) | Centrifugal pump for automobile manufacturing and paint spraying process | |
| CN105972055A (en) | Compressor crankshaft and preparation method thereof | |
| WO2020170344A1 (en) | Casing for radial compressor and radial compressor | |
| CN104755755A (en) | Pump element for a hydraulic unit having a pump piston | |
| JP2015214944A (en) | Hermetic electric compressor | |
| KR100676103B1 (en) | Crankshaft Support Frame for Compressor and Manufacturing Method Thereof | |
| KR101424007B1 (en) | A sintered insert ring joined with oil gallery in diesel engine piston, method for manufacturing it, and piston comprising it |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 201206 Jinqiao Road, Pudong New Area Jinqiao Export Processing Zone, Shanghai, 1051 Applicant after: Shanghai Haili Electrical Appliance Co. Ltd. Address before: 201206 Pudong New Area Jinqiao Export Processing Zone, Nanjing Road, No. 888, Shanghai Applicant before: Rili Electric Appliance Co., Ltd., Shanghai |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |