A magnetizing and positioning mechanism for a compressor rotor

Abstract

A magnetizing positioning mechanism for a compressor rotor, characterized in that: it includes a compressor pump body, a positioning head, and a rotor balance block. The positioning head includes a fixed part, a movable part, and a central positioning rod. The fixed part is connected to the movable part through the central positioning rod. The compressor pump body is connected to the central positioning rod, and the rotor balance block is connected to the movable part. The magnetizing positioning mechanism for a compressor rotor of the present invention has the functions of realizing reliable positioning of models with a height difference H ≤ 3.0 mm of the rotor balance block and automatically positioning during rotor magnetizing, thus realizing automated production.

Description

Technical Field

[0001] The present invention relates to the technical field of magnetizing and positioning mechanisms for compressor rotors, and particularly to a magnetizing and positioning mechanism for compressor rotors. Background Art

[0002] When magnetizing a compressor rotor, a coil is first sleeved around the rotor periphery, and the coil instantaneously discharges to generate a strong magnetic field, causing the permanent magnetic material (magnet) inside the rotor placed in the coil to be permanently magnetized. Since there are requirements for the pole direction of the rotor, the poles of the rotor must be aligned with the poles of the coil. Therefore, the rotor must be positioned first before the magnetizing operation can be carried out.

[0003] The rotor positioning method uses a tooling positioning head to position the rotor balance block. Due to the increasingly diverse development of products and the need for the development of automated production, the original rigid and immovable positioning head can no longer meet the positioning requirements of rotor balance blocks with a height difference H≤3.0mm, nor can it achieve automatic positioning and automated production. For rotor balance blocks with a height difference H≤3.0mm, it is impossible or difficult to machine a positioning guide chamfer at the front end of the positioning head. When there is even a slight deviation in the initial angle of the rotor, the positioning head cannot align and hold the rotor balance block, resulting in positioning failure. Summary of the Invention

[0004] In order to overcome the disadvantages that in the prior art, when magnetizing a compressor rotor, the rigid and immovable positioning head is only applicable to models with a rotor balance block height difference H>3.0mm and is not suitable for automatic positioning and automated production, the purpose of the present invention is to achieve reliable positioning of rotor balance blocks with a height difference H≤3.0mm, realize automatic positioning during rotor magnetizing, and thus achieve automated production.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a magnetizing and positioning mechanism for a compressor rotor, including a compressor pump body, a positioning head, and a rotor balance block. The positioning head includes a fixed part, a movable part, and a central positioning rod. The fixed part is connected to the movable part through the central positioning rod. The compressor pump body is connected to the central positioning rod, and the rotor balance block is connected to the movable part.

[0006] As a further improvement of the present invention: it includes a pressing cover, and the pressing cover is fixed to the positioning head of the equipment by screw connection.

[0007] As a further improvement of the present invention: one end of the fixed part is a first inclined surface end. A limiting surface is provided at one end of the first inclined surface end, a limiting screw is provided at the other end, and a sliding groove is provided along the inclined surface in the central part.

[0008] As a further improvement of the present invention: an axial export groove is provided inside the center of the fixed part.

[0009] As a further improvement of the present invention: it includes a positioning end at one end of the movable part that cooperates with the rotor balance block, and a positioning boss that cooperates with the rotor balance block is provided on the positioning end.

[0010] As a further improvement of the present invention: it includes a second inclined surface end at the other end of the movable part that cooperates with the fixed part, and a raised part that cooperates with the sliding groove is arranged along the inclined surface at the center of the second inclined surface end.

[0011] As a further improvement of the present invention: one end of the central positioning rod passes through the export groove and the runway hole, and the other end is fixed to the positioning head.

[0012] As a further improvement of the present invention: a limit step is arranged at the end of the central positioning rod connected to the positioning head, and a second spring is installed between the limit step and the pressing cover.

[0013] As a further improvement of the present invention: the first inclined surface end and the second inclined surface end are combined together through the sliding groove.

[0014] As a further improvement of the present invention: the side of the movable part and the limiting surface of the fixed part are connected by a first spring.

[0015] Compared with the prior art, the beneficial effect of the present invention is: a magnetizing and positioning mechanism for a compressor rotor. Due to the adoption of the inclined-inward propulsion type positioning mechanism of the present invention, there is no need to design a positioning and guiding chamfer at the front end of the tooling head. The positioning surface of the mechanism first moves away from the positioning surface of the rotor balance block and then slowly approaches and fits tightly. Therefore, reliable positioning of the rotor balance block with a height difference H ≤ 3.0 mm can be achieved, automatic positioning during rotor magnetizing can be realized, and thus automated production can be achieved. Description of the Drawings

[0016] Figure 1 It is a schematic diagram of the initial state of the present invention.

[0017] Figure 2 It is a schematic diagram of the pressing state of the present invention.

[0018] Figure 3 It is a sectional view of the positioning mechanism of the present invention.

[0019] Explanation of the reference numerals in the drawings: 1. Compressor pump body; 2. Compressor rotor; 3. Rotor balance block; 4. Movable part; 5. Pressing cover; 6. Central positioning rod; 7. Fixed part; 8. First spring; 9. Second spring; 10. Limit screw; 11. Limiting surface. Detailed Embodiment

[0020] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

[0021] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion; the present invention will be further described below in conjunction with the drawings and embodiments:

[0022] Detailed description of the present invention:

[0023] Refer to Figures 1 to 3 , a magnetization positioning mechanism for a compressor rotor, comprising a compressor pump body 1, a positioning head, and a rotor balance weight 3. The positioning head includes a fixed part 7, a movable part 4, and a central positioning rod 6. The fixed part 7 is connected to the movable part 4 through the central positioning rod 6. The compressor pump body 1 is connected to the central positioning rod 6. The rotor balance weight 3 is connected to the movable part 4.

[0024] It includes a pressing cover 5. The pressing cover 5 is fixed to the positioning head of the device by screw connection.

[0025] One end of the fixed part 7 is a first inclined surface end. A limiting surface 11 is provided at one end of the first inclined surface end, and a limiting screw 10 is provided at the other end. A sliding groove is provided along the inclined surface in the central part.

[0026] An axial lead-out groove is provided inside the center of the fixed part 7.

[0027] It includes a positioning end where one end of the movable part 4 cooperates with the rotor balance weight 3. A positioning boss for cooperating with the rotor balance weight 3 is provided at the positioning end.

[0028] It includes a second inclined surface end where the other end of the movable part 4 cooperates with the fixed part 7. A convex part for cooperating with the sliding groove is provided along the inclined surface at the center of the second inclined surface end.

[0029] One end of the center positioning rod 6 passes through the guide groove and the runway hole, and the other end is fixed to the positioning head.

[0030] A limiting step is arranged at one end of the center positioning rod 6 connected to the positioning head, and a second spring 9 is installed between the limiting step and the pressing cover.

[0031] The first bevel end and the second bevel end are combined together through the sliding groove.

[0032] The side of the movable part 4 is connected to the limiting surface 11 of the fixed part 7 via the first spring 8 .

[0033] The working principle of the present invention is as follows: a compressor rotor magnetization positioning mechanism, which is achieved by dividing the positioning fixture head into two parts, one part is fixed and the other part is movable. The two parts are combined together through a dovetail groove, and the joint surface is at an angle of 45°. As the positioning fixture head descends, the center positioning rod first supports the center position of the rotor under the action of the second spring to keep its center unchanged. Then, through the oblique advancement of the 45° angle dovetail groove, the movable part can move in the horizontal direction (radial direction) until it is tightly stuck on the rotor balance block. After the positioning head rises, the movable part can be reset by the first spring, and the movable range of the movable part is controlled by the limit screw and the limit surface.

[0034] Through motion simulation and calculation, the angle range of the oblique thrust joint surface that meets the positioning function of the mechanism is between 30°-60°, and 45° is the best. Increasing or decreasing the angle will increase the friction resistance of the movable part, causing the movable part to move unsmoothly. When the angle is close to 30° or 60°, the movable part will self-lock and cannot move.

[0035] Implementation case 1:

[0036] When the compressor rotor is magnetized, a coil is first used to cover the outer periphery of the rotor. The coil discharges instantly to generate a strong magnetic field, which permanently magnetizes the permanent magnetic material (magnetic steel) inside the rotor in the coil. Since the rotor has magnetic pole direction requirements, the rotor poles must be aligned with the magnetic poles of the coil, so the rotor must be positioned before magnetization can be performed.

[0037] The rotor positioning method is to use a tooling positioning head to position the rotor balancing block 3. Due to the increasing diversification of product development and the need for automated production development, the original rigid and immovable positioning tooling head can no longer meet and achieve the positioning of the rotor balancing block 3 with a height difference of H≤3.0mm, nor can it achieve automatic positioning and automated production. Because the rotor balancing block 3 has a height difference of H≤3.0mm, the front end of the positioning head cannot or is difficult to process the positioning guide chamfer. When the initial angle of the rotor has a slight deviation, the positioning head cannot align and jam the rotor balancing block, and the positioning fails.

[0038] The positioning head comprises a fixed part 7 , a movable part 4 , and a center positioning rod 6 .

[0039] One end of the fixed part is fixed to the positioning fixture head of the equipment through a clamping cover 5 and connected by screws, and the other end is a bevel end, one end of the bevel end is provided with a limited position surface 11, and the other end is provided with a limited position screw 10, and the central part has a sliding groove along the bevel. An axial guide groove is provided in the center of the fixed part 7.

[0040] One end of the movable part 4 is a positioning end that cooperates with the rotor balancing block 3, one end of the end surface is provided with a positioning boss that cooperates with the rotor balancing block 3, and the other first end is a sloped end that cooperates with the fixed part 7, and a convex part that cooperates with the sliding groove of the fixed part 7 is provided along the slope in the center of the slope. An axial runway hole is provided in the center of the movable part 4.

[0041] The center positioning rod 6 is provided with a limited step. One end of the center positioning rod 6 passes through the guide groove and the runway hole of the fixed part 7 and the movable part 4, and can be extended toward the rotor with the fixed part 7. The front end of the center positioning rod 6 has a taper and can be extended to support the center position of the rotor. The front end of the center positioning rod 6 contacts the center of the rotor before the movable part contacts the rotor balance block 3, so that the center of the rotor remains unchanged. The other end is fixed to the outside of the positioning tool head and is covered with a second spring 9, and the second spring 9 is installed between the clamping cover 5 and the limited step.

[0042] The inclined surfaces of the movable part 4 and the fixed part 7 are combined together through a sliding groove. The combination angle is 45°, and the side of the movable part 4 is connected to the limiting surface of the fixed part 7 through the first spring 8; during operation, as the positioning fixture head descends, the center positioning rod 6 first supports the center position of the rotor under the action of the second spring 9 to keep its center unchanged. Then, the movable part is moved in the horizontal direction (radial direction) through the oblique advancement of the 45° angle dovetail groove. The initial state of the movable part is a distance A of 3-5mm from the positioning surface of the balancing block. As the entire positioning mechanism descends, the movable part gradually approaches the step surface of the balancing block until it is tightly stuck on the rotor balancing block 3. At this time, the distance between the movable part and the positioning surface of the balancing block is B, B=0mm. This method solves the positioning problem of the rotor balancing block height difference H≤3.0mm model, and allows a certain angle deviation (about ±5°) in the initial state of the rotor. As long as the rotor balancing block has a step surface, it can be reliably and accurately positioned. After the positioning head is raised, the movable part can be reset by the first spring, and the next product can be processed in a cycle in turn to realize automated production.

[0043] Implementation case 2:

[0044] The positioning head comprises a fixed part 7 , a movable part 4 , and a center positioning rod 6 .

[0045] One end of the fixed part is fixed to the positioning fixture head of the equipment through a clamping cover 5 and connected by screws, and the other end is a bevel end, one end of the bevel end is provided with a limited position surface 11, and the other end is provided with a limited position screw 10, and the central part has a sliding groove along the bevel. An axial guide groove is provided in the center of the fixed part 7.

[0046] One end of the movable part 4 is a positioning end that cooperates with the rotor balancing block 3, one end of the end surface is provided with a positioning boss that cooperates with the rotor balancing block 3, and the other first end is a sloped end that cooperates with the fixed part 7, and a convex part that cooperates with the sliding groove of the fixed part 7 is provided along the slope in the center of the slope. An axial runway hole is provided in the center of the movable part 4.

[0047] The center positioning rod 6 is provided with a limited step. One end of the center positioning rod 6 passes through the guide groove and the runway hole of the fixed part 7 and the movable part 4, and can be extended toward the rotor with the fixed part 7. The front end of the center positioning rod 6 has a taper and can be extended to support the center position of the rotor. The front end of the center positioning rod 6 contacts the center of the rotor before the movable part contacts the rotor balance block 3, so that the center of the rotor remains unchanged. The other end is fixed to the outside of the positioning tool head and is covered with a second spring 9, and the second spring 9 is installed between the clamping cover 5 and the limited step.

[0048] The inclined surfaces of the movable part 4 and the fixed part 7 are combined together through a sliding groove. The combination angle is 35°, and the side of the movable part 4 is connected to the limiting surface of the fixed part 7 through the first spring 8; during operation, as the positioning fixture head descends, the center positioning rod 6 first supports the center position of the rotor under the action of the second spring 9 to keep its center unchanged. Then, the movable part is moved in the horizontal direction (radial direction) through the oblique advancement of the 45° angle dovetail groove. The initial state of the movable part is a distance A of 3-5mm from the positioning surface of the balancing block. As the entire positioning mechanism descends, the movable part gradually approaches the step surface of the balancing block until it is tightly stuck on the rotor balancing block 3. At this time, the distance between the movable part and the positioning surface of the balancing block is B, B=0mm.

[0049] Through motion simulation and calculation, the angle range of the oblique thrust joint surface that meets the positioning function of the mechanism is between 30°-60°, and 45° is the best. Increasing or decreasing the angle will increase the friction resistance of the movable part, causing the movable part to move unsmoothly. When the angle is close to 30° or 60°, the movable part will self-lock and cannot move.

[0050] Main functions of the present invention: A magnetizing and positioning mechanism for a compressor rotor has the functions of reliably positioning rotors with a height difference H ≤ 3.0 mm of balance weights and automatically positioning the rotors during magnetizing, thus realizing automated production.

[0051] In summary, after reading the documents of the present invention, those of ordinary skill in the art can make various corresponding transformation schemes without creative mental labor according to the technical solutions and technical concepts of the present invention, and all of them fall within the scope protected by the present invention.

Claims

1. A magnetic charging and positioning mechanism for a compressor rotor, characterized in that: It includes a compressor pump body, a positioning head, and a rotor balance weight. The positioning head includes a fixed part, a movable part, and a central positioning rod. The fixed part and the movable part are connected by the central positioning rod. The compressor pump body is connected to the central positioning rod, and the rotor balance weight is connected to the movable part. One end of the fixed part is a first inclined surface end. A limiting surface is provided at one end of the first inclined surface end, a limiting screw is provided at the other end, and a sliding groove is provided along the inclined surface in the central part.

2. The magnetic charging and positioning mechanism for a compressor rotor according to claim 1, characterized in that: It includes a pressing cover, and the pressing cover is connected by screws to fix the fixed part to the positioning head of the equipment.

3. The magnetizing and positioning mechanism for a compressor rotor according to claim 1, characterized in that: An axial lead-out groove is provided inside the center of the fixed part.

4. A magnetization positioning mechanism for a compressor rotor according to claim 1, characterized in that: It includes a positioning end where one end of the movable part cooperates with the rotor balance weight, and a positioning boss that cooperates with the rotor balance weight is provided on the positioning end.

5. The magnetizing and positioning mechanism for a compressor rotor according to claim 4, characterized in that: It includes a second inclined surface end where the other end of the movable part cooperates with the fixed part, and a protruding part that cooperates with the sliding groove is provided along the inclined surface at the center of the second inclined surface end.

6. The magnetizing positioning mechanism of a compressor rotor according to claim 3, wherein: An axial runway hole is provided inside the center of the movable part. One end of the central positioning rod passes through the lead-out groove and the runway hole, and the other end is fixed to the positioning head.

7. The magnetizing positioning mechanism of a compressor rotor according to claim 2, characterized in that: A limiting step is provided at the end where the central positioning rod is connected to the positioning head, and a second spring is installed between the limiting step and the pressing cover.

8. The magnetizing and positioning mechanism for a compressor rotor according to claim 5, characterized in that: The first inclined surface end and the second inclined surface end are combined together through the sliding groove.

9. The magnetizing and positioning mechanism for a compressor rotor according to claim 1, characterized in that: The side of the movable part and the limiting surface of the fixed part are connected by a first spring.

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