Assembling method of integrated rotor compressor

Abstract

The invention provides an assembly method of an integrated rotor compressor, which comprises the following steps of: S1, loading a stator in a motor assembly into a motor cavity from a top opening of a shell, and finishing the assembly of a pump body assembly outside the shell; s2, a rotor in the motor assembly and a crankshaft in the pump body assembly are connected, the pump body assembly is arranged in a pump body cavity from the bottom opening of the shell, and a rotor gap is inserted into a stator; s3, the upper end face of the pump body assembly is attached to the lower end face of the bottom of the liquid storage cavity, so that the refrigerant outlet communicates with the air suction channel; s4, the pump body assembly and the shell are fixed while the gap between the rotor and the stator is guaranteed; and S5, electric connection of the motor assembly is completed, and the main body cavity and the liquid storage cavity are closed. The assembling method of the integrated rotor compressor has the beneficial effects that the pump body assembly, the upper cover, the lower cover and the shell can be firmly connected, the assembling method is suitable for the shell made of an aluminum alloy material, and the assembling method is easy to operate and high in assembling precision.

Description

Technical Field

[0001] This invention relates to the field of rotary compressor technology, and more particularly to an assembly method for an integrated rotary compressor. Background Technology

[0002] Existing rotary compressors typically use a casing made of iron, with the receiver as a separate component. This receiver is inserted into the casing via an intake pipe and welded to the outside of the casing, working in conjunction with the pump assembly spot-welded inside the casing to form the intake structure. However, with increasing demands for lightweight compressors, casings made of lightweight aluminum alloy cannot be welded to the receiver and pump assembly, making the assembly of rotary compressors more difficult. Summary of the Invention

[0003] The purpose of this invention is to provide an assembly method for an integrated rotary compressor that meets the requirements for lightweight rotary compressors.

[0004] This invention provides an assembly method for an integrated rotary compressor. The rotary compressor includes a housing, an upper cover, a lower cover, and a motor assembly and a pump assembly disposed within the housing. The housing has openings at both its top and bottom, and its interior contains a main body cavity and a liquid storage cavity radially distributed along the housing. The main body cavity includes a motor cavity and a pump body cavity connected sequentially from top to bottom. The motor assembly is disposed in the motor cavity, and the cylinder of the pump assembly is disposed in the pump body cavity. The bottom of the liquid storage cavity has a refrigerant outlet communicating with the pump body cavity. The assembly method for the rotary compressor includes the following steps: S1: Insert the stator of the motor assembly into the motor cavity through the top opening of the housing, and complete the assembly of the pump body assembly outside the housing; S2: Connect the rotor in the motor assembly to the crankshaft in the pump body assembly, insert the pump body assembly into the pump body cavity through the bottom opening of the housing, and insert the rotor gap into the stator; S3: The pump body assembly has an air intake channel. One end of the air intake channel passes through the end face of the pump body assembly, and the other end is connected to the inner cavity of the cylinder. The upper end face of the pump body assembly is attached to the lower bottom end face of the liquid storage cavity, so that the refrigerant outlet is connected to the air intake channel. S4: While ensuring the gap between the rotor and the stator, fix the pump body assembly and the housing; S5: Complete the electrical connection of the motor assembly, merge and fix the upper cover at the top of the housing, merge and fix the lower cover at the bottom of the housing, and close the main body cavity and the liquid storage cavity.

[0005] Preferably, the liquid storage chamber is further provided with a suction pipe; step S1 further includes installing the suction pipe in the liquid storage chamber and inserting it into the refrigerant outlet.

[0006] Preferably, step S1 further includes assembling the stator into the motor cavity via a heat-shrinking process.

[0007] Preferably, step S2 further includes providing a plurality of positioning components on the pump body assembly and / or the housing, wherein the positioning components include positioning pins and positioning holes, and when the rotor is inserted into the stator, the gap between the rotor and the stator is ensured by aligning the positioning pins and positioning holes.

[0008] Preferably, step S4 further includes forming a stepped surface at the junction of the motor cavity and the pump body cavity, and providing a connecting part on the outer periphery of the pump body assembly, fitting the upper end face of the pump body assembly to the stepped surface, and using fasteners passing through the connecting part and the stepped surface to fasten the two together.

[0009] Preferably, the stepped surface and the bottom lower surface of the liquid storage cavity are located on the same plane.

[0010] Preferably, the pump body assembly includes an upper cylinder cover disposed on the top of the cylinder, and the connecting portion includes a first connecting lug extending outward from the outer periphery of the upper cylinder cover; step S4 includes abutting the first connecting lug against the stepped surface, and achieving a tight connection between the first connecting lug and the stepped surface by means of the fastener.

[0011] Preferably, the connecting portion includes a second connecting lug extending outward from the outer periphery of the cylinder; step S4 includes abutting the second connecting lug against the step surface and achieving a tight connection between the second connecting lug and the step surface through the fastener.

[0012] Preferably, step S4 further includes fixing the pump body assembly and the housing by welding.

[0013] Preferably, a seal is provided at least one of the following three locations: between the refrigerant outlet and the air intake channel, between the top of the housing and the upper cover, and between the bottom of the housing and the lower cover.

[0014] The advantages of this invention are that it provides an assembly method for an integrated rotary compressor, which can achieve a tight connection between the pump body assembly, the upper cover, the lower cover and the housing, and is suitable for housings made of aluminum alloy. The assembly method is simple to operate and has high assembly accuracy. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of a rotary compressor equipped with the pump body assembly of Embodiment 1; Figure 2 This is a cross-sectional view of the rotor compressor equipped with the pump body assembly of Embodiment 2.

[0016] Component designation explanation: 1-Shell; 11-Separation wall; 12-Step surface; 21-Stator; 22-Rotor; 31-Crankshaft; 32-Upper cylinder head; 321-Main body; 322-First connecting lug; 323-Journal; 33-Cylinder; 331-Intake passage; 332-Second connecting lug; 34-Piston; 35-Lower cylinder head; 36-Muffler; 4-Fasteners; 51 - Top cover; 52 - Bottom cover; 61-Motor cavity; 62-Pump body cavity; 63-Liquid storage cavity; 631-Refrigerant outlet; 7-Inhalation tube. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0018] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of these terms in this invention according to the specific circumstances.

[0020] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0021] Figure 1 The image shown is a cross-sectional view of a rotary compressor equipped with a pump body assembly, as described in the following description. Figure 1 The attached diagram serves as a reference for direction. Figure 1In the view, the direction upward along the paper is the up direction, the direction downward along the paper is the down direction, the direction to the right along the paper is the right direction, and the direction to the left along the paper is the left direction.

[0022] like Figure 1 As shown, the rotary compressor used in this invention includes a housing 1, an upper cover 51, a lower cover 52, and a motor assembly and a pump assembly disposed within the housing 1. The motor assembly includes a stator 21 and a rotor 22. The pump assembly includes a cylinder 33, a piston 34 mounted within the cylinder 33, an upper cylinder cover 32 connected to the top of the cylinder 33, a lower cylinder cover 35 connected to the bottom of the cylinder 33, a muffler 36, and a crankshaft 31. The number of cylinders 33 in the pump assembly can be one or more. When there are multiple cylinders 33, an intermediate plate is provided between two adjacent cylinders 33. The upper cylinder cover 32 includes a main body portion 321 and a journal 323 connected to each other, and also includes a central through hole that passes through both the main body portion 321 and the journal 323. The upper end of the crankshaft 31 is connected to the rotor 22, and the lower end passes sequentially through the central through hole, the cylinder 33, the piston 34, and the lower cylinder cover 35. The crankshaft 31 drives the piston 34 to rotate eccentrically, compressing the gas inside the cylinder 33 to obtain high-pressure gas with increased pressure. The upper cylinder head 32 and the lower cylinder head 35 cooperate with each other to support the crankshaft 31 and seal the compression chamber of the cylinder 33 to ensure the normal operation of the pump assembly.

[0023] The housing 1 has openings at both the top and bottom. Inside the housing 1, there are a main body cavity and a liquid storage cavity 63 distributed radially to the left and right, with a partition wall 11 extending axially between them. The main body cavity includes a motor cavity 61 and a pump body cavity 62 connected sequentially from top to bottom. The motor assembly is disposed in the motor cavity 61, and the cylinder 33 of the pump body assembly is disposed in the pump body cavity 62. The pump body cavity 62 is located below the liquid storage cavity 63. The bottom of the liquid storage cavity 63 has a refrigerant outlet 631 that communicates with the pump body cavity 62.

[0024] Preferably, the housing 1 is made of aluminum alloy.

[0025] like Figure 1 and Figure 2 As shown, the assembly method of the rotary compressor provided by the present invention includes the following steps: S1: Insert the stator 21 from the top opening of the housing 1 into the motor cavity 61, and complete the assembly of the pump body assembly outside the housing 1.

[0026] Specifically, the stator 21 is installed in the motor cavity 61 using a heat-shrink process. The pump body assembly includes fitting the upper cylinder head 32 and the lower cylinder head 35 onto both sides of the cylinder 33, and then allowing the crankshaft 31 to pass through the upper cylinder head 32, the cylinder 33, the piston 34, and the lower cylinder head 35. Further, a suction pipe 7 is also provided in the liquid storage cavity 63; step S1 also includes installing the suction pipe 7 in the liquid storage cavity 63 and inserting it into the refrigerant outlet 631.

[0027] S2: Connect the rotor 22 in the motor assembly to the crankshaft 31 in the pump body assembly, install the pump body assembly into the pump body cavity 62 through the bottom opening of the housing 1, and insert the rotor 22 into the stator 21 with a gap.

[0028] S3: The pump body assembly has an air intake channel 331. One end of the air intake channel 331 passes through the end face of the pump body assembly, and the other end is connected to the inner cavity of the cylinder 33. The upper end face of the pump body assembly is attached to the lower end face of the liquid storage chamber 63, so that the refrigerant outlet 631 is connected to the air intake channel 331.

[0029] S4: While ensuring the clearance between the rotor 22 and the stator 21, fix the pump body assembly and the housing 1. Preferably, the pump body assembly and the housing 1 are fixed by welding.

[0030] S5: Complete the electrical connection of the motor assembly, merge and fix the upper cover 51 at the top of the housing 1, and merge and fix the lower cover 52 at the bottom of the housing 1, sealing the main body cavity and the liquid storage cavity 63. Specifically, the upper cover 51 and the lower cover 52 are both fixedly connected to the housing 1 by multiple bolts.

[0031] In summary, the present invention provides an assembly method for an integrated rotary compressor, which can achieve a tight connection between the pump body assembly and the housing, and the assembly method is simple and accurate to operate.

[0032] Furthermore, step S4 also includes forming a stepped surface 12 at the junction of the motor cavity 61 and the pump body cavity 62, and a connecting part is provided on the outer periphery of the pump body assembly. The upper end face of the pump body assembly is attached to the stepped surface 12, and a fastener 4 is used to pass through the connecting part and the stepped surface 12 to fasten the two together. The fastener 4 is specifically a bolt. The stepped surface 12 and the lower end face of the liquid storage cavity 63 are located on the same horizontal plane, which facilitates the vertical insertion of the fastener 4 and helps to improve the connection tightness between the pump body assembly and the stepped surface 12.

[0033] The pump body assembly specifically has the following two embodiments.

[0034] like Figure 1As shown, in Embodiment 1 of the pump body assembly, the connecting portion includes a first connecting lug 322 extending outward from the outer periphery of the main body portion 321 of the upper cylinder head 32, and a first connecting hole is provided on the first connecting lug 322. Meanwhile, one end of the intake passage 331 passes through the main body portion 321 and is connected to the refrigerant outlet 631.

[0035] In Embodiment 1 using the pump body assembly, step S4 further includes: abutting the first connecting lug 322 against the stepped surface 12, and passing the fastener 4 through the first connecting hole and the mounting hole on the stepped surface 12 to achieve a secure connection between the first connecting lug 322 and the stepped surface 12. In the rotor compressor of Embodiment 1 with the pump body assembly assembled, the main body 321 is located in the pump body cavity 62, and the journal 323 is located in the motor cavity 61, with the main body 321 separating the motor cavity 61 and the pump body cavity 62.

[0036] like Figure 2 As shown, in Embodiment 2 of the pump body assembly, the connecting portion includes a second connecting lug 332 extending outward from the outer periphery of the cylinder 33, and the second connecting lug 332 is provided with a second connecting hole. Meanwhile, an intake passage 331 is formed on the cylinder wall of the cylinder 33 and communicates with the refrigerant outlet 631.

[0037] In Embodiment Two using the pump body assembly, step S4 further includes: abutting the second connecting lug 332 against the stepped surface 12, and passing the fastener 4 through the second connecting hole and the mounting hole on the stepped surface 12 to achieve a secure connection between the second connecting lug 332 and the stepped surface 12. In the rotor compressor of Embodiment Two with the pump body assembly assembled, the cylinder 33 separates the motor cavity 61 and the pump body cavity 62, while the upper cylinder cover 32 is completely located within the motor cavity 61.

[0038] Furthermore, to ensure the clearance between the stator 21 and the rotor 22, step S2 further includes providing a plurality of positioning components on the pump body assembly and / or housing 1. Each positioning component includes a positioning pin and a positioning hole. When the rotor 22 is inserted into the stator 21, the clearance between the rotor 22 and the stator 21 is ensured by aligning the positioning pin and the positioning hole. For example, a first positioning hole is provided on the upper cylinder cover 32 or cylinder 33 of the pump body assembly, and a second positioning hole is provided on the stepped surface 12. The positioning pin passes through the first positioning hole and the second positioning hole in sequence to achieve relative positioning between the pump body assembly and the stepped surface 12.

[0039] Furthermore, a seal is provided at least one of the following three locations: between the refrigerant outlet 631 and the suction channel 331, between the top of the housing 1 and the upper cover 51, and between the bottom of the housing 1 and the lower cover 52, to ensure a gas-tight connection and prevent gas leakage. Specifically, the seal is a rubber sealing ring.

[0040] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. An assembly method for an integrated rotary compressor, characterized in that, The rotary compressor includes a housing (1), an upper cover (51), a lower cover (52), and a motor assembly and a pump assembly disposed within the housing (1). The housing (1) has openings at both its top and bottom, and contains a main body cavity and a liquid storage cavity (63) radially distributed along the housing (1). The main body cavity includes a motor cavity (61) and a pump body cavity (62) connected sequentially from top to bottom. The motor assembly is disposed in the motor cavity (61), and the cylinder (33) of the pump assembly is disposed in the pump body cavity (62). The bottom of the liquid storage cavity (63) has a refrigerant outlet (631) communicating with the pump body cavity (62). The assembly method of the rotary compressor includes the following steps: S1: Insert the stator (21) in the motor assembly into the motor cavity (61) through the top opening of the housing (1), and complete the assembly of the pump body assembly outside the housing (1); S2: Connect the rotor (22) in the motor assembly to the crankshaft (31) in the pump body assembly, insert the pump body assembly into the pump body cavity (62) through the bottom opening of the housing (1), and insert the rotor (22) into the stator (21) with a gap; S3: The pump body assembly is provided with an air intake channel (331). One end of the air intake channel (331) passes through the end face of the pump body assembly, and the other end is connected to the inner cavity of the cylinder (33). The upper end face of the pump body assembly is attached to the lower end face of the liquid storage cavity (63), so that the refrigerant outlet (631) is connected to the air intake channel (331). S4: While ensuring the gap between the rotor (22) and the stator (21), fix the pump body assembly and the housing (1); S5: Complete the electrical connection of the motor assembly, merge and fix the upper cover (51) on the top cover of the housing (1), merge and fix the lower cover (52) on the bottom cover of the housing (1), and close the main body cavity and the liquid storage cavity (63).

2. The assembly method according to claim 1, characterized in that, The liquid storage chamber (63) is also provided with a suction pipe (7); step S1 further includes installing the suction pipe (7) in the liquid storage chamber (63) and inserting it into the refrigerant outlet (631).

3. The assembly method according to claim 1, characterized in that, Step S1 further includes that the stator (21) is assembled in the motor cavity (61) by a heat fitting process.

4. The assembly method according to claim 1, characterized in that, Step S2 further includes setting a plurality of positioning components on the pump body assembly and / or the housing (1). The positioning components include positioning pins and positioning holes. When the rotor (22) is inserted into the stator (21), the gap between the rotor (22) and the stator (21) is ensured by aligning the positioning pins and positioning holes.

5. The assembly method according to claim 1, characterized in that, Step S4 further includes forming a stepped surface (12) at the junction of the motor cavity (61) and the pump body cavity (62), and providing a connecting part on the outer periphery of the pump body assembly, attaching the upper end face of the pump body assembly to the stepped surface (12), and using fasteners (4) to pass through the connecting part and the stepped surface (12) to fasten the two together.

6. The assembly method according to claim 5, characterized in that, The stepped surface (12) and the bottom lower surface of the liquid storage cavity (63) are located on the same plane.

7. The assembly method according to claim 5, characterized in that, The pump body assembly includes an upper cylinder cover (32) disposed on the top of the cylinder (33), and the connecting part includes a first connecting lug (322) extending outward from the outer periphery of the upper cylinder cover (32); the step S4 includes abutting the first connecting lug (322) against the stepped surface (12) and achieving a fastening connection between the first connecting lug (322) and the stepped surface (12) by means of the fastener (4).

8. The assembly method according to claim 5, characterized in that, The connecting part includes a second connecting ear (332) extending outward from the outer periphery of the cylinder (33); step S4 includes abutting the second connecting ear (332) against the step surface (12) and achieving a fastening connection between the second connecting ear (332) and the step surface (12) by means of the fastener (4).

9. The assembly method according to claim 1, characterized in that, Step S4 further includes fixing the pump body assembly and the housing (1) by welding.

10. The assembly method according to claim 1, characterized in that, A seal is provided at least one of the following three locations: between the refrigerant outlet (631) and the air intake channel (331), between the top of the housing (1) and the upper cover (51), and between the bottom of the housing (1) and the lower cover (52).

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