Balance weight for adjusting rotor rotation balance, rotor of a rotating electric machine, rotating electric machine, method for adjusting its rotation balance, and method for manufacturing a rotating electric machine.

Abstract

To provide a rotor balance adjustment method for a rotating electric machine that prevents variations in work, does not restrict the range of adjustment, does not create wasted space, thereby eliminating design constraints, allows balance measurement and machining to be easily performed in the same setting, and prevents a decrease in work efficiency by eliminating the need to move the rotor each time work is performed. [Solution] The rotor rotation balance adjustment balance weight 5 is a ring-shaped balance weight attached to the outer circumference of the rotor 10 of a rotating electric machine to adjust the rotation balance of the rotor 10, and is provided with three or more through holes 2 in the radial direction, and the through holes 2 are for inserting a movable adjustment member 3. Female threads can be used for the through holes 2, and male threads that fit the female threads can be used for the adjustment member 3.

Description

Technical Field

[0001] The present invention relates to a balance weight for adjusting the rotor rotation balance, a rotor of a rotating electrical machine, a rotating electrical machine, a method for adjusting its rotation balance, and a method for manufacturing a rotating electrical machine. In particular, in a rotating electrical machine such as an electric motor or a generator, it relates to an adjustment structure for optimizing the balance of the rotor and a method for implementing the same.

Background Art

[0002] In the manufacturing process of the rotor of a rotating electrical machine, due to limitations in materials and processing accuracy, the rotational balance often cannot be completely uniform. Therefore, additional balance adjustment is generally required after manufacturing. As conventional methods for adjusting the rotational balance of a rotor, the following two are commonly used.

[0003] FIG. 7 is a perspective explanatory view showing a method using an adhesive weight as a conventional rotor rotation balance adjustment method in a rotating electrical machine. As shown in the figure, in this method, the rotational balance is adjusted by attaching an adhesive weight 70 to the unbalanced part of the rotor 710.

[0004] FIG. 8 is a perspective explanatory view showing a method using a balance weight (weight component) as a conventional rotor rotation balance adjustment method in a rotating electrical machine. As shown in the figure, in this method, a balance weight 85 is attached to the rotor 810 in advance, and then a part of the balance weight 85 is removed using a tool such as a drill to adjust the rotational balance.

[0005] Regarding rotor rotation balance adjustment technology, patent applications and other documents have been filed in the past. For example, Patent Document 1, cited below, discloses a motor balance adjustment component to be attached to a motor shaft, comprising a ring-shaped plate body having a ring body with a female thread formed in one place that penetrates from the outer circumference to the inner circumference, and a set screw having a male thread corresponding to the female thread, and fixing to the motor shaft by inserting the motor shaft into the ring body and screwing the set screw into the female thread and bringing the set screw into contact with the motor shaft.

[0006] Furthermore, Patent Document 2 discloses a method in which a screw is provided as an unbalanced component in each of a pair (two) balance rings, the balance rings are attached to the rotor, and the balance is adjusted by rotating the pair of balance rings. [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. WO2015 / 15588, "Motor Balance Adjustment Parts and Motors" [Patent Document 2] Japanese Utility Model Publication No. 57-139836, "A device for adjusting the balance of a rotating body" [Overview of the project] [Problems that the invention aims to solve]

[0008] However, conventional methods for adjusting the rotor balance of motors have several problems. First, the method using sticky weights as shown in Figure 8 inevitably results in variations in the work because the weights deform during installation. On the other hand, the method of grinding down the weight parts with a drill, as explained in Figure 9, has limitations on the amount that can be removed, thus restricting the range of adjustment. Furthermore, attempting to increase the amount that can be removed increases wasted space, creating design constraints. In addition, it is difficult to perform balance measurement and machining in the same setting, requiring the rotor to be installed and removed each time the work is done, which reduces work efficiency.

[0009] Therefore, the problem that the present invention aims to solve is to provide a rotor balance adjustment method for a rotating electric machine that eliminates the problems of the conventional technology, prevents variations in work, does not restrict the range of adjustment, does not create unnecessary space, thereby eliminating design constraints, allows balance measurement and machining to be easily performed in the same setting, and prevents a decrease in work efficiency by eliminating the need to move the rotor each time work is performed. [Means for solving the problem]

[0010] As a result of considering the above problems, the inventors of this application conceived the idea that the rotational balance of the motor could be optimized by adding and applying adjustment parts to the rotor and using an adjustment method that utilizes these parts. They found that this method stabilizes the operation of the rotor, reduces vibration and noise, and also contributes to extending the life of the motor, and based on this, they completed the present invention. In other words, the invention claimed in this application, or at least disclosed, as a means of solving the above problems is as follows.

[0011] [1] A ring-shaped balance weight for adjusting the rotational balance of a rotor of a rotating electric machine, which is attached to the outer circumference of the rotor to adjust the rotational balance of the rotor, characterized in that it has three or more through holes in the radial direction, and the through holes are for inserting an adjustment member that can move forward and backward. [2] The rotor rotation balance adjustment balance weight according to [1], characterized in that four through holes are provided. [3] A balance weight for adjusting the rotor rotation balance according to either [1] or [2], characterized in that the through holes are provided at equal intervals. [4] A balance weight for adjusting the rotor rotation balance according to either [1] or [2], characterized in that the through hole is a female thread. [5] A balance weight for adjusting the rotor rotation balance as described in [4], characterized in that it is accompanied by a male thread corresponding to the female thread.

[0012] [6] A rotor for a rotating electric machine, characterized in that the rotor rotation balance adjustment balance weight is mounted such that the adjustment member corresponding to each through-hole of the rotor rotation balance adjustment balance weight described in [3] is screwed into each through-hole and fastened to the rotor. [7] The rotor of the rotating electric machine according to [6], characterized in that the through holes are provided in four locations. [8] The rotor of the rotating electric machine according to [6], characterized in that the adjustment member is fixed without the use of adhesive or other secondary fixing means. [9] The rotor of the rotating electric machine according to claim 6, characterized in that the adjustment member is fixed using an adhesive or other secondary fixing means.

[10] A rotating electric machine characterized by having a rotor of a rotating electric machine as described in any of [6], [7], [8], or [9].

[0013]

[11] A method for adjusting the rotational balance of a rotor of a rotating electric machine using a rotor rotational balance adjustment balance weight as described in claim 3, comprising a weight installation step of installing the rotor balance adjustment balance weight on the outer circumference of the rotor of the rotating electric machine, and a contact step of screwing the adjustment member corresponding to the through hole into the through hole and applying a contact action to the rotor, wherein in the contact step, the degree of advancement and retraction is adjusted while the adjustment member makes contact with the rotor.

[12] The method for adjusting the rotational balance of a rotor of a rotating electric machine according to

[11] , characterized in that it does not have a secondary fixing process in which the adjustment member is fixed by an adhesive or other secondary fixing means.

[13] A method for adjusting the rotational balance of a rotor of a rotating electric machine according to

[11] , characterized by having a secondary fixing step of fixing the adjustment member with an adhesive or other secondary fixing means.

[14] A method for manufacturing a rotating electric machine, characterized in that, in the manufacture of the rotating electric machine, a rotor with a rotationally balanced balance weight is formed by a weight installation process in which a balance weight for adjusting the rotor rotation balance described in claim 3 is installed on a rotor constituting the rotating electric machine, and a contact process in which an adjustment member corresponding to the through hole is screwed into the through hole and a contact action is applied to the rotor. [Effects of the Invention]

[0014] The rotor rotation balance adjustment balance weight, rotor of a rotating electric machine, rotating electric machine, method for adjusting its rotation balance, and method for manufacturing a rotating electric machine of the present invention are configured as described above. As a result, it is possible to prevent variations in work caused by deformation during installation of conventional adhesive weights, prevent limitations on the amount of material removed and the decrease in work efficiency in conventional methods of cutting balance weights, and allow for an unrestricted range of adjustment. Furthermore, it is possible to eliminate unnecessary space, thereby eliminating design constraints, and balance measurement and machining can be easily performed in the same setting, eliminating the need to move the rotor each time work is performed and preventing a decrease in work efficiency.

[0015] The rotor rotation balance adjustment weight of the present invention can be precisely adjusted by through holes such as screws provided in the radial direction, thereby enabling high-precision adjustment of the rotation balance. Furthermore, by significantly reducing variations in work, it is possible to suppress weight variations from product to product and ensure stable product quality. In addition, since the balance weight is easy to install and adjust, the efficiency of the adjustment work is improved and, as mentioned above, it also contributes to reducing wasted space. In other words, the present invention not only enables high-precision and efficient rotor balance adjustment, but also improves product performance and reliability by maintaining a uniform weight in the product.

[0016] Incidentally, one difference from the above-disclosed technology will be described. Although there is a prior art method for attaching a balancer, the present invention that can adjust the rotational balance of the rotor according to the degree of eccentricity is considered to have sufficient patentability.

Brief Description of the Drawings

[0017] [Figure 1] It is an explanatory plan view showing the basic configuration of the balance weight for adjusting the rotational balance of the rotor of the present invention. [Figure 2] It is a perspective explanatory view showing a configuration example of the balance weight for adjusting the rotational balance of the rotor of the present invention. [Figure 3] It is a perspective explanatory view of the rotor to which the balance weight for adjusting the rotational balance of the rotor of the present invention shown in Fig. 2 is attached. [Figure 4] It is an explanatory plan view from the axial end face direction showing an example of the attachment state of the balance weight for adjusting the rotational balance of the rotor in the rotor of the present invention shown in Fig. 3. [Figure 5] It is a flowchart showing the basic configuration of the method for adjusting the rotational balance of the rotor of the rotating electrical machine of the present invention. [Figure 6] It is a flowchart showing the basic configuration of the method for adjusting the rotational balance of the rotor of the rotating electrical machine of the present invention having a secondary fixing process. [Figure 7] It is a perspective explanatory view showing a method using an adhesive weight as a conventional method for adjusting the rotational balance of a rotor in a rotating electrical machine. [Figure 8] It is a perspective explanatory view showing a method using a balance weight as a conventional method for adjusting the rotational balance of a rotor in a rotating electrical machine.

Embodiments for Carrying Out the Invention

[0018] Hereinafter, the present invention will be described in detail with reference to the drawings. Figure 1 is a plan view diagram illustrating the basic configuration of the rotor rotation balance adjustment balance weight of the present invention. As shown in the figure, the rotor rotation balance adjustment balance weight 5 is a ring-shaped balance weight attached to the outer circumference of the rotor 10 of a rotating electric machine to adjust the rotational balance of the rotor 10, and is provided with three or more through holes 2 in its radial direction, the main configuration of which the through holes 2 are for inserting a movable adjustment member 3.

[0019] The rotor rotation balance adjustment weight 5, configured in this way, is attached to the outer circumference of the rotor 10. Adjustment members 3 that fit these weights are inserted through three or more through holes 2 located in the radial direction, and the rotational balance of the rotor 10 is adjusted by the degree to which the adjustment members 3 move forward and backward. That is, the adjustment members 3 are inserted through the through holes 2 of the rotor rotation balance adjustment weight 5 and come into contact with the outer circumference of the rotor 10, applying pressure to the outer circumference of the rotor 10. This ensures stable attachment of the rotor rotation balance adjustment weight 5 to the rotor 10 and adjusts the rotational balance of the rotor 10.

[0020] In using this rotor rotation balance adjustment balance weight 5, the balance weight 5 can be freely moved radially by adjusting the degree of advancement (pressure amount) of each adjustment member 3, thereby optimizing the rotational balance. This adjustment method enables more precise and efficient rotational balance adjustment compared to conventional methods of using adhesive weights or scraping off balance weights.

[0021] The adjustment member 3 only needs to be inserted into at least one of the through holes 2. That is, the rotational balance adjustment action of the adjustment member 3 is performed using one or more of the three or more through holes 2. The degree of insertion (advancement and retreat, amount of indentation) of the adjustment members 3, 3, ... inserted into each of the through holes 2, 2, ... does not need to be the same, but rather should be done appropriately for adjusting the rotational balance of the rotor 10. Therefore, eccentricity as shown in Figure 4 below is acceptable. The same applies to the configuration examples shown in Figure 2, etc.

[0022] Figure 2 is a perspective view illustrating an example of the configuration of the rotor rotation balance adjustment balance weight of the present invention. As shown in the figure, the rotor rotation balance adjustment balance weight 25 is characterized by having four through holes 22 in the configuration shown in Figure 1. That is, the rotor rotation balance adjustment balance weight 25 is a balance weight that is attached to the outer circumference of the rotor 210 of a rotating electric machine to adjust the rotational balance of the rotor 210, and is provided with four through holes 22 in the radial direction, and the through holes 22 are for inserting a movable adjustment member 23.

[0023] The rotor rotation balance adjustment weight 25, configured in this way, is attached to the outer circumference of the rotor 210, and four through holes 22, 22, 22, 22 are inserted through which corresponding adjustment members 23, 23, 23, 23 are inserted, and the rotational balance of the rotor 210 is adjusted by the degree to which the adjustment members 23 move forward and backward. That is, each adjustment member 23 is inserted through each through hole 22 of the rotor rotation balance adjustment weight 25 and comes into contact with the outer circumference of the rotor 210, applying pressure to the outer circumference of the rotor 210. This ensures stable attachment of the rotor rotation balance adjustment weight 25 to the rotor 210 and adjusts the rotational balance of the rotor 210.

[0024] Although the rotor rotation balance adjustment balance weight of the present invention has three or more through holes, four holes are optimal in terms of workability. While five or more holes are also acceptable, the effects intended by the present invention can be fully obtained with four through holes.

[0025] Furthermore, as shown in Figure 2, the through holes 22, 22, ... of the rotor rotation balance adjustment balance weight 25 can be configured to be provided at equal intervals. The invention is not excluded even if the holes are not at equal intervals, but in terms of ease and efficiency of rotation balance adjustment, equal intervals are optimal. By making the intervals between each through hole 22 equal, the pressing force between each adjustment member 23 inserted through each through hole 22 is balanced, making it less likely for the adjustment member 23 to come off. In particular, by providing four through holes 22 at equal intervals as shown in the figure, the opposing adjustment members 23, 23 are pushed against each other, resulting in a good state of equilibrium, and the possibility of the adjustment member 23 coming off is considerably low. Therefore, there is no need for any post-processing such as fixing the adjustment member 23 with a separate fixing means.

[0026] The through-hole 22 can be a female thread. In this case, the adjustment member 23 uses a male thread corresponding to the female thread. It is also possible to have a rotor rotation balance adjustment balance weight 25 that includes an adjustment member male thread (23) corresponding to the through-hole female thread (22).

[0027] Figure 3 is a perspective view illustrating a rotor with the rotor rotation balance adjustment balance weights of the present invention, as shown in Figure 2, attached. As shown in the figure, the rotor rotation balance adjustment balance weights 25 are attached to the rotor 210 with the corresponding adjustment members 23 screwed into each through hole 22 of the rotor rotation balance adjustment balance weights 25 and fastened to the rotor 210, thereby forming a rotor 240 with the balance weights attached.

[0028] In the diagram, the balance weight 25 for adjusting the rotor rotation balance is mounted in contact with the end face of the rotor core 27, but the mounting position is not limited to this, and it may be mounted at a position away from the end face of the rotor core 27. Regardless of the mounting position, common effects can be obtained in preventing variations in work, preventing a decrease in work efficiency, and eliminating constraints on the adjustment range.

[0029] Figure 4 is a plan view from the shaft end face direction illustrating an example of the mounting state of the balance weight for rotor rotation balance adjustment in the rotor of the present invention shown in Figure 3. This shows the state after the rotor rotation balance has been adjusted by attaching the balance weight 25 for rotor rotation balance adjustment to the rotor 210.

[0030] As illustrated in the figure, the amount of indentation (threading depth) of each adjustment member (male thread) 23 inserted through each through hole (female thread) 22 and in contact with the outer surface of the rotor 210 is not uniform, but unbalanced. In other words, the installed rotor rotation balance adjustment balance weight 25 is eccentric. However, this is an example of the result of adjusting the rotor rotation balance, and the rotation balance of the rotor 210 is adjusted according to the degree of this eccentricity.

[0031] As described above, the adjustment members 3, etc., whose rotor rotation balance has been adjusted by the balance weight 5 for rotor rotation balance adjustment, can maintain a stable and reliable fixed state by the balance of forces between the adjustment members 3, etc., without the need to use adhesive or other secondary fixing means. However, the adjustment members 3, etc. may be fixed by adhesive or other secondary fixing means. In either case, it is within the scope of the present invention. Furthermore, a rotating electric machine equipped with a rotor of the present invention having any of the above-described configurations is also within the scope of the present invention.

[0032] Figure 5 is a flowchart showing the basic configuration of the method for adjusting the rotational balance of the rotor of a rotating electric machine according to the present invention. As shown in the figure, the method for adjusting the rotational balance of the rotor of this rotating electric machine is a method for adjusting the rotational balance of the rotor 210 of a rotating electric machine using a rotor rotational balance adjustment balance weight 25, which has through holes 22 provided at equal intervals as shown in Figure 2 above. The method consists of a weight installation process P10 in which the rotor balance adjustment balance weight 25 is installed on the outer circumference of the rotor 210 of the rotating electric machine, and a contact process P20 in which an adjustment member 23 corresponding to the through holes 22 is screwed into the through holes 22 to exert a contact effect on the rotor 210. A characteristic feature of the method is that in the contact process P20, the degree of advancement and retraction is adjusted while the adjustment member 23 makes contact with the rotor 210.

[0033] According to the method for adjusting the rotational balance of the rotor of this rotating electric machine with the above configuration, in the weight installation process P10, the rotor balance adjustment balance weight 25 is installed on the outer circumference of the rotor 210 of the rotating electric machine, and then in the contact process P20, an adjustment member 23 corresponding to the through hole 22 is used and screwed into the through hole 22 to make contact with the rotor 210. In the contact process P20, the adjustment member 23 makes contact with the rotor 210 while adjusting the degree of advancement and retraction. In this way, the rotational balance of the rotor 210 is adjusted by the rotor rotation balance adjustment balance weight 25, and a rotationally balanced rotor RS is obtained.

[0034] Figure 6 is a flowchart showing the basic configuration of the rotational balance adjustment method for the rotor of a rotating electric machine according to the present invention, which has a secondary fixing process. As shown in the figure, this flowchart is characterized by having a secondary fixing process P30 in which the adjustment member 23 is fixed to the rotationally balanced rotor RS formed in the contact process P20 by adhesive or other secondary fixing means, in addition to the configuration shown in Figure 5.

[0035] According to the rotational balance adjustment method for the rotor of this rotating electric machine with the above configuration, the rotationally balanced rotor RS, formed through the weight installation process P10 and the contact process P20, is fixed in the secondary fixing process P30 by adhesive or other secondary fixing means to the adjustment member 23, thereby obtaining a secondary fixed rotor RT. As mentioned above, the secondary fixing process P30, which is the process of fixing the adjustment member by secondary fixing means, is not strictly necessary, but by including it, the reliability of maintaining the rotational balance adjustment result can be obtained.

[0036] Furthermore, a method for manufacturing a rotating electric machine, including a method for adjusting the rotational balance of the rotor of the rotating electric machine of the present invention as shown in Figure 5 or Figure 6, is also within the scope of the present invention. This method for manufacturing a rotating electric machine produces a rotating electric machine equipped with a rotor 240 with a rotational balance adjusted and balance weights attached, as shown in Figure 3. [Industrial applicability]

[0037] The rotor rotation balance adjustment balance weight and other components of the present invention offer many advantages, such as eliminating variations in work performance, reduced work efficiency, and limitations on the adjustment range. Therefore, this invention has high industrial applicability in the manufacturing and use fields of rotating electrical machinery, including AC servo motors, motors, generators, sensors, and all related fields. [Explanation of symbols]

[0038] 2, 22… Through hole 3, 23... Adjustment Members 5.25...Balance weights for adjusting rotor rotation balance 10, 210... Rotor 27…Rotor core 29...axis 240... Rotor with balance weights installed P10... Weight installation process P20…Contact process P30…Secondary fixation process RS... Rotary balanced rotor RT...Secondary fixed rotor 70… Sticky weight 77, 87... Rotor core 79, 89... axis 710, 810… Rotor 81…Cutting part 85... Balance weight

Claims

1. A ring-shaped balance weight attached to the outer circumference of the rotor of a rotating electric machine to adjust the rotational balance of the rotor, It has three or more through holes in the radial direction, The through-hole is for inserting a movable adjustment member. A balance weight for adjusting the rotational balance of a rotor, characterized by the following features.

2. The rotor rotation balance adjustment balance weight according to claim 1, characterized in that four through holes are provided.

3. A balance weight for adjusting the rotor rotation balance according to either claim 1 or 2, characterized in that the through holes are provided at equal intervals.

4. A balance weight for adjusting the rotor rotation balance according to either claim 1 or 2, characterized in that the through hole is a female thread.

5. A balance weight for adjusting the rotor rotation balance according to claim 4, characterized in that it is provided with a male thread corresponding to the female thread.

6. A rotor for a rotating electric machine, characterized in that the rotor rotation balance adjustment balance weight is attached to the rotor in a state in which the adjustment member corresponding to each through hole of the rotor rotation balance adjustment balance weight described in claim 3 is screwed into each through hole and fastened to the rotor.

7. The rotor of the rotating electric machine according to claim 6, characterized in that the through holes are provided in four locations.

8. The rotor of the rotating electric machine according to claim 6, characterized in that the adjustment member is fixed without the use of adhesive or other secondary fixing means.

9. The rotor of the rotating electric machine according to claim 6, characterized in that the adjustment member is fixed using an adhesive or other secondary fixing means.

10. A rotating electric machine characterized by comprising a rotor of the rotating electric machine described in any one of claims 6, 7, 8, or 9.

11. A method for adjusting the rotational balance of a rotor of a rotating electric machine using a balance weight for adjusting the rotor rotational balance described in claim 3, The process of installing the balance weight for rotor balance adjustment on the outer circumference of the rotor of a rotating electric machine, The process involves using the adjustment member corresponding to the through hole and screwing it into the through hole to exert a contact force on the rotor. During the contact process, the degree of movement is adjusted while the adjustment member makes contact with the rotor. A method for adjusting the rotational balance of a rotor of a rotating electric machine, characterized by the following features.

12. A method for adjusting the rotational balance of a rotor of a rotating electric machine according to claim 11, characterized in that it does not have a secondary fixing process in which the adjustment member is fixed by an adhesive or other secondary fixing means.

13. A method for adjusting the rotational balance of a rotor of a rotating electric machine according to claim 11, characterized by having a secondary fixing step of fixing the adjustment member with an adhesive or other secondary fixing means.

14. In the manufacture of rotating electric machines, A weight installation process for installing a rotor rotation balance adjustment balance weight according to claim 3 on the rotor constituting the rotating electric machine, and By using the adjustment member corresponding to the through hole and screwing it into the through hole, a contact process is performed in which a contact action is exerted on the rotor, A rotor with a balance weight that has been adjusted for rotational balance is formed. A method for manufacturing a rotating electric machine, characterized by the following features.

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