Compressor motor rotor press fitting method

Abstract

The invention discloses a compressor motor rotor press-fitting method, which comprises the following steps of: before a press-fitting process of a rotor I, firstly placing the rotor I in a positioning block of a tool plate I for positioning, then placing a pump body I on the tool plate I for positioning, and then moving the tool plate I loaded with the rotor I and the pump body I to the press-fitting process through a speed multiplication line body I; the first tool plate is fixed and positioned through the fixing and positioning mechanism, after the first tool plate is fixed and positioned, the first electric cylinder main shaft works, press fitting operation is executed, and interference fit between a crankshaft in the first pump body and a rotor center hole of the first rotor is achieved. According to the invention, the complexity of equipment can be reduced, and meanwhile, the press-fitting stroke is reduced, so that the productivity of the press-fitting process is improved, and the investment of the equipment is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of compressor motor rotor press-fitting, and in particular to a compressor motor rotor press-fitting method. Background Art

[0002] The rotor and crankshaft of the piston refrigeration compressor (including fixed frequency and variable frequency motors) are interference fit. The assembly methods include shrink fit, cold pressing or hot pressing process methods, such as Figure 2 As shown, for large-scale production, traditional process technology is generally assembled on an assembly line, and the specific steps are as follows: the manipulator places the rotor 11 from the bottom of the speed line body 10 on the electric cylinder rotor positioning pressure head 12. When the speed line body 10 moves the tooling plate 9 carrying the pump body 8 to the working position, the electric cylinder main shaft 13 is actuated to perform the press-fitting operation to achieve an interference fit between the crankshaft in the pump body 8 (a component of the pump body) and the rotor center hole of the rotor 11. The press-fitting process has the following defects: there are many mechanism actions during the rotor feeding process, the equipment structure is complex, there are many moving parts, and there are many failure points in actual production; the press-fitting stroke is long, the process cycle is slow, and the equipment investment cost is high. Summary of the invention

[0003] In view of the above technical problems in the related art, the present invention provides a compressor motor rotor press-fitting method, which can solve the above problems.

[0004] To achieve the above technical objectives, the technical solution of the present invention is implemented as follows: A method for pressing a compressor motor rotor comprises the following steps: before the rotor is pressed, the rotor is first positioned in a positioning block of a tooling plate, and then a pump body is positioned on the tooling plate. The tooling plate carrying the rotor and the pump body is moved to the pressing process through a speed line, and the tooling plate is fixed and positioned by a fixed positioning mechanism. After the tooling plate is fixed and positioned, an electric cylinder main shaft is operated to perform a pressing operation to achieve an interference fit between a crankshaft in the pump body and a rotor center hole of the rotor.

[0005] Furthermore, the pressing process is a cold pressing process or a hot pressing process.

[0006] Furthermore, before press-fitting, the crankshaft and rotor 1 in the pump body 1 are in a separated state.

[0007] Furthermore, the rotor one is located below the pump body one, and the electric cylinder main shaft one is located below the rotor one.

[0008] Furthermore, when performing the pressing operation, the electric cylinder main shaft 1 works, driving the electric cylinder pressure head to press the rotor 1 upward, so that the crankshaft in the pump body 1 passes through the rotor center hole of the rotor 1, thereby achieving an interference fit between the crankshaft in the pump body 1 and the rotor center hole of the rotor 1.

[0009] Further, when performing the press-fitting operation, the main shaft of the electric cylinder 1, the rotor center hole of the first rotor, and the crankshaft in the first pump body are coaxially arranged.

[0010] Advantages of the present invention: Through this application, the complexity of the equipment can be reduced, and at the same time, the press-fitting stroke can be reduced, thereby improving the production capacity of the press-fitting process and reducing the equipment investment. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] The present invention will be further described in detail below with reference to the drawings.

[0013] Figure 1 is the press-fitting process diagram of the compressor motor rotor described in the embodiment of the present invention; Figure 2 is the press-fitting process diagram of the existing compressor motor rotor described in the background art.

[0014] In the figure: 1. First pump body; 2. Crankshaft; 3. First rotor; 4. First tooling plate; 5. First double-speed line body; 6. Electric cylinder press head; 7. Main shaft of the first electric cylinder; 8. Second pump body; 9. Second tooling plate; 10. Second double-speed line body; 11. Second rotor; 12. Electric cylinder rotor positioning press head; 13. Main shaft of the second electric cylinder. Detailed Embodiments

[0015] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present invention.

[0016] As Figure 1 shown, according to the present invention, a method for press-fitting a compressor motor rotor is disclosed, including the following steps: Before the press-fitting process of the first rotor 3, first place the first rotor 3 in the positioning block of the first tooling plate 4 for positioning, then place the first pump body 1 on the first tooling plate 4 for positioning, and then move the first tooling plate 4 carrying the first rotor 3 and the first pump body 1 to the press-fitting process through the first double-speed line body 5. Fix and position the first tooling plate 4 through the fixed positioning mechanism. After the first tooling plate 4 is fixed and positioned, the main shaft of the first electric cylinder 7 works to perform the press-fitting operation, realizing the interference fit between the crankshaft in the first pump body 1 and the rotor center hole of the first rotor 3.

[0017] Embodiment 1: In this application, the first rotor 3 is positioned in the positioning block of the first tooling plate 4, so that there is no need to place the rotor from the bottom of the double-speed line body on the electric cylinder rotor positioning press head by a manipulator, which can save the relevant equipment of the manipulator. At the same time, the structure of the electric cylinder rotor positioning press head can be simplified. The structure of the electric cylinder rotor positioning press head 12 (as Figure 2 shown) is simplified into the structure of the electric cylinder press head 6 (as Figure 1 shown).

[0018] When performing the press-fitting operation, the first electric cylinder spindle 7 works to drive the electric cylinder press head 6 to press the first rotor 3 upward, so that the crankshaft in the first pump body 1 passes through the rotor center hole of the first rotor 3, thereby realizing the interference fit between the crankshaft in the first pump body 1 and the rotor center hole of the first rotor 3.

[0019] The following technical points need to be noted in the method of this application: Before press-fitting, the crankshaft 2 in the first pump body 1 and the first rotor 3 are in a separated state, that is, the crankshaft 2 and the first rotor 3 do not contact each other, and an appropriate gap needs to be left; when performing the press-fitting operation, the first electric cylinder spindle 7, the rotor center hole of the first rotor 3, and the crankshaft 2 in the first pump body 1 need to be coaxially arranged; the initial heights of the first electric cylinder spindle 7 and the electric cylinder press head 6 should minimize the gap with the bottom of the tooling under the condition of avoiding the passage of the first tooling plate 4, so as to ensure that the stroke in the press-fitting process is as small as possible. In a specific embodiment, as Figure 1 shown, the press-fitting stroke of the electric cylinder press head 6 is h 1 , compared with the press-fitting stroke h 2 of the original press-fitting method (as Figure 2 shown), the press-fitting stroke of the press-fitting method of this application is reduced by more than half. Through actual implementation verification, by producing with the method of this application, the production capacity of the press-fitting process can be increased by more than 50%, and the equipment investment can be reduced by 50%.

[0020] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for press-fitting a compressor motor rotor, characterized in that: The method comprises the following steps: before the rotor (3) is pressed, the rotor (3) is first positioned in a positioning block of a tooling plate (4), and then the pump body (1) is positioned on the tooling plate (4). Then, the tooling plate (4) carrying the rotor (3) and the pump body (1) is moved to the press-fitting process through a speed-multiplying line (5), and the tooling plate (4) is fixed and positioned through a fixed positioning mechanism. After the tooling plate (4) is fixed and positioned, the electric cylinder main shaft (7) is operated to perform the press-fitting operation, so as to achieve an interference fit between the crankshaft (2) in the pump body (1) and the rotor center hole of the rotor (3).

2. A compressor motor rotor press-fitting method according to claim 1, characterized in that: The pressing process is a cold pressing process or a hot pressing process.

3. A compressor motor rotor press-assembly method according to claim 1, characterized in that: Before press-fitting, the crankshaft (2) and the rotor (3) in the pump body (1) are in a separated state.

4. A compressor motor rotor press-fitting method according to claim 1, characterized in that: The rotor one (3) is located below the pump body one (1), and the electric cylinder main shaft one (7) is located below the rotor one (3).

5. A compressor motor rotor press-fitting method according to claim 4, characterized in that: When performing the press-fitting operation, the electric cylinder main shaft 1 (7) works, driving the electric cylinder pressure head (6) to press the rotor 1 (3) upward, so that the crankshaft (2) in the pump body 1 (1) passes through the rotor center hole of the rotor 1 (3), thereby achieving an interference fit between the crankshaft (2) in the pump body 1 (1) and the rotor center hole of the rotor 1 (3).

6. A compressor motor rotor press-assembly method according to claim 5, characterized in that: When performing the press-fitting operation, the electric cylinder main shaft 1 (7), the rotor center hole of the rotor 1 (3) and the crankshaft (2) in the pump body 1 (1) are coaxially arranged.

Images