Installation method and installation structure of a rotating electric machine

Abstract

A rotating electric machine installation method, comprising: a placement step in which a leg, which has a first surface in which a first groove is formed, is placed on a support member, which has a second surface in which a second groove is formed; a length adjustment step in which, after the placement step, in a key member, which includes a narrow part and a wide part that has a pair of projections that project from the narrow part on both sides in the width direction, at least one of the pair of projections is shortened so as to be able to fit into a wide-groove portion of the first groove or second groove; and a fitting step in which, after the length adjustment step, the key member is fitted into a key groove formed by the first groove and the second groove.

Description

Technical Field

[0001] The present disclosure relates to a method for installing a rotating electric machine and an installation structure of a rotating electric machine. This application claims priority based on Japanese Patent Application No. 2022-055330 filed with the Japan Patent Office on March 30, 2022, and incorporates the content herein by reference.

Background Art

[0002] Generally, a rotating electric machine is composed of a stator and a rotor. The stator includes a stator core and a stator coil. The stator coil is incorporated and fixed in slots provided in the stator core. The rotating electric machine is configured to generate an electromagnetic force by rotating a rotor having N poles and S poles inside the stator coil.

[0003] Since the rotating electric machine may thermally expand along the axial direction of the rotor due to the influence of heat generated during operation of the rotating electric machine, a thrust key (key member) is inserted into a key groove to suppress thermal expansion along the axial direction of the rotor.

[0004] Patent Document 1 discloses a key fastening structure including a key groove provided in a stator base of a rotating electric machine and a stator base key inserted into the key groove to couple a stator frame and a stator base. Patent Document 2 discloses a key fastening structure including key grooves provided in a base and a stator of a rotating electric machine, a placing key fitted into the key groove provided in the base, and a side key for fixing the placing key and the key groove provided in the stator.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Summary of the Invention

[0006] Incidentally, when fastening the legs of a rotating electric machine to the base that supports the legs using key fastening, if misalignment occurs between the grooves formed in the legs and the grooves formed in the base, it may become difficult to insert the thrust keys (key members) into these grooves. If such misalignment occurs during the installation of a rotating electric machine, the work efficiency of the installation work may decrease.

[0007] In view of the above circumstances, at least one embodiment of the present invention aims to provide a method and structure for installing a rotating electric machine that can improve the workability of installation work when misalignment occurs during the installation of the rotating electric machine. [Means for solving the problem]

[0008] The method for installing a rotating electric machine according to at least one embodiment of the present invention is as follows: A method for installing a rotating electric machine comprising a rotor, a stator arranged to surround the rotor, and a casing configured to house the rotor and the stator, A first groove is formed in the casing, extending along a first direction that intersects the axial direction of the rotor. and extending in the axial direction A leg portion having a first surface is formed with a second groove portion extending along the first direction. and extending in the axial direction A mounting step of placing on a support member having a second surface, wherein the leg portion is placed on the support member such that the narrow groove portion of the first groove portion or the second groove portion, which has a larger groove width, is contained within the widthwise range of the wide groove portion of the first groove portion or the second groove portion, A preparation step of preparing a key member including a narrow portion that can be fitted into the narrow groove, and a wide portion having a one-sided projection that protrudes to one side in the width direction from the narrow portion and a other-sided projection that protrudes to the other side in the width direction from the narrow portion, After the placement step, a length adjustment step is performed to shorten at least one of the one-sided protrusion or the other-sided protrusion of the key member so that it can be fitted into the wide groove. The method includes, after the length adjustment step, an insertion step of inserting the key member into the keyway formed by the first groove and the second groove.

[0009] The installation structure for a rotating electric machine according to at least one embodiment of the present invention is A mounting structure for a rotating electric machine comprising a rotor, a stator arranged to surround the rotor, and a casing configured to house the rotor and the stator, A first groove is formed in the casing, extending along a first direction that intersects the axial direction of the rotor. and extending in the axial direction A leg portion having a first surface and a second groove portion extending along the first direction are formed. and extending in the axial direction A support member having a second surface, wherein the leg portion is placed on the support member such that the narrow groove portion of the first groove portion or the second groove portion, which has a larger groove width, is contained within the widthwise range of the wide groove portion of the first groove portion or the second groove portion, A key member comprising a narrow portion fitted into the narrow groove and a wide portion fitted into the wide groove, The wider portion of the key member has a protruding portion on one side in the width direction that protrudes more than the narrower portion, and a protruding portion on the other side in the width direction that protrudes more than the narrower portion. At least one of the tip surfaces of the one-sided projection or the other-sided projection has a cut mark. [Effects of the Invention]

[0010] According to at least one embodiment of the present invention, a method and structure for installing a rotating electric machine are provided that can improve the workability of installation work when misalignment occurs during the installation of the rotating electric machine. [Brief explanation of the drawing]

[0011] [Figure 1]It is a schematic perspective view showing a part of a rotating electrical machine in one embodiment, with a break shown. [Figure 2] It is a schematic exploded view of the installation structure of a rotating electrical machine according to one embodiment. [Figure 3] It is a schematic view showing the state of a rotating electrical machine in one embodiment as viewed from one axial direction. [Figure 4] It is an explanatory diagram for explaining the installation structure of a rotating electrical machine according to a comparative example. [Figure 5] It is a flowchart of the installation method of a rotating electrical machine according to one embodiment. [Figure 6] It is a schematic view of the leg portion and the support member of the installation structure of a rotating electrical machine according to one embodiment. [Figure 7] It is a schematic perspective view of a key member prepared in the preparation step of the installation method of a rotating electrical machine according to one embodiment. [Figure 8] It is a schematic perspective view of the key member after the length adjustment step of the installation method of a rotating electrical machine according to one embodiment. [Figure 9] It is a schematic view of the installation structure of a rotating electrical machine according to one embodiment. [Figure 10] It is a schematic view of the installation structure of a rotating electrical machine according to one embodiment.

Embodiments for Carrying Out the Invention

[0012] Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the component parts described as embodiments or shown in the drawings are not intended to limit the scope of the present invention thereto, but are merely illustrative examples.

[0013] (Rotating Electrical Machine) Figure 1 is a schematic perspective view showing a portion of a rotating electric machine 2 in one embodiment. In some embodiments, the rotating electric machine 2 comprises a rotor 21, a stator 22 arranged to surround the rotor 21, and a casing 23 configured to house the rotor 21 and the stator 22, as shown in Figure 1. In some embodiments described below, the case in which the rotating electric machine 2 consists of an electric motor is described, but this disclosure is also applicable when the rotating electric machine 2 consists of a generator.

[0014] The stator 22 includes a stator core 221 and stator coils 222. The stator coils 222 are mounted on the inner circumferential surface of the stator core 221, which is formed by laminating electromagnetic steel sheets into an annular shape, and are positioned to cover the outside of the rotor 21 in the radial direction (direction perpendicular to the axis LA of the rotor 21), creating a gap between them and the rotor 21. The rotating electric machine (motor) 2 is configured to generate an electromagnetic force by rotating the rotor 21, which has an N pole and a S pole, inside the stator coils 222. In the following description, directions may be described with reference to the axial direction of the rotor 21 (the direction in which the axis LA of the rotor 21 extends), as shown in Figure 1.

[0015] (Installation structure of rotating electric machinery) Figure 2 is a schematic exploded view of the mounting structure 10 for a rotating electric machine 2 according to one embodiment. Figure 3 is a schematic view of the rotating electric machine 2 in one embodiment, viewed from one side in the axial direction (axial direction of the rotor 21). The mounting structure 10 for a rotating electric machine 2 according to several embodiments, as shown in Figure 2, comprises a leg portion 3 provided on the casing 23 and having a first surface 31 on which a first groove portion 32 is formed, a support member (e.g., a sole plate) 4 on which the leg portion 3 is placed and having a second surface 41 on which a second groove portion 42 is formed, and a key member 6 that is fitted into a keyway 5 formed by the first groove portion 32 and the second groove portion 42 which are arranged opposite each other. The mounting structure 10 is a combination of the leg portion 3, the support member 4, and the key member 6.

[0016] Each of the first groove 32 and the second groove 42 extends along a first direction intersecting the axial direction of the rotor 21, with both ends in the extending direction (first direction) being open. In the illustrated embodiment, the first direction extends along a direction perpendicular to both the axial and vertical directions of the rotor 21. Here, the axial direction of the rotor 21 extends along one direction in the horizontal direction.

[0017] (leg) In the embodiments shown in Figures 2 and 3, the leg portion 3 has a longitudinal direction along the axial direction of the rotor 21 and consists of an angle with an L-shaped cross-section perpendicular to the longitudinal direction. The leg portion 3 includes a flat first plate portion 33 having a longitudinal direction along the axial direction of the rotor 21 and with the first surface 31 described above as its lower surface, and a flat second plate portion 34 having a longitudinal direction along the axial direction of the rotor 21 and projecting vertically upward from one end in the width direction of the first plate portion 33.

[0018] In the embodiments shown in Figures 2 and 3, the casing 23 includes a casing body 24 with an arc-shaped cross-section perpendicular to the axial direction of the rotor 21, which covers a portion of the rotor 21 and stator 22 in the circumferential direction. Each of the leg portion 3 and the casing body 24 is made of a metal material. The second plate portion 34 is fixed to the casing body 24 by welding or the like, with its outer surface, which is connected to the first surface 31, in contact with the outer circumferential surface of the casing body 24.

[0019] (Support member) In the embodiments shown in Figures 2 and 3, the support member 4 is a flat plate having a longitudinal direction along the axial direction of the rotor 21, with the second surface 41 described above as its upper surface. The support member 4 is made of a metal material. In the illustrated embodiments, as shown in Figure 3, the support member 4 is placed on the floor surface 12 of the installation location 11 where the rotating electric machine 2 is installed, and is fixed to the floor surface 12 (installation location 11). As shown in Figure 3, a recess 13 is formed in the installation location 11 that is recessed below the floor surface 12, and the casing body 24 may be inserted into the inside of the recess 13.

[0020] (Installation structure of a rotating electric machine in a comparative example) Figure 4 is an explanatory diagram illustrating the installation structure 010 of the rotating electric machine 2 according to the comparative example. In the installation structure 010 of the rotating electric machine 2 according to the comparative example, the same reference numerals are used for parts that are common to the installation structure 10 of the rotating electric machine 2, and redundant explanations are omitted as appropriate.

[0021] As shown in Figure 4, the mounting structure 010 of the rotating electric machine 2 according to the comparative example comprises a leg portion 3 having a first surface 31 on which a first groove 032 is formed, a support member 4 having a second surface 41 on which a second groove 042 is formed, on which the leg portion 3 is placed so as to be in contact with the second surface 41, and a key member 06 that is fitted into a keyway 05 formed by the first groove 032 and the second groove 042 which are arranged opposite each other.

[0022] The groove width of the second groove 042 is the same length as the groove width of the first groove 032, and the key member 06 has a rectangular cross-section perpendicular to the first direction, which is the direction in which it is inserted into the key groove 05. In this case, when the leg portion 3 is placed on the support member 4, if the first groove 032 is shifted in the width direction of the second groove 042 relative to the second groove 042, the key groove 05 formed by the first groove 032 and the second groove 042 will no longer be rectangular, making it difficult to insert the key member 06 into the key groove 05.

[0023] If the installation structure 010 is newly constructed and the support member 4 is not fixed to the floor surface 12 of the installation site 11 which is the foundation, it is possible to align the widthwise positions of the first groove 032 and the second groove 042 by aligning the position of the support member 4 with the leg portion 3. However, when installing the rotating electric machine 2 on an existing support member 4, the position of the support member 4 cannot be aligned with the leg portion 3 because the support member 4 is fixed to the floor surface 12 of the installation site 11 which is the foundation. Furthermore, when installing the rotating electric machine 2 on an existing support member 4, it may be necessary to measure the groove dimensions (groove width, etc.) of the first groove 032 and the second groove 042, and the position of the support member 4 at the installation site of the rotating electric machine 2. Due to errors in these measurements, there is a high possibility that the first groove 032 will be misaligned with the second groove 042 in the widthwise direction when the rotating electric machine 2 is installed.

[0024] (Installation method for rotating electric machinery) Figure 5 is a flowchart of installation method 1 for a rotating electric machine 2 according to one embodiment. In installation method 1 for a rotating electric machine 2 according to several embodiments, the above-described installation structure 10 is formed by combining the leg portion 3, the support member 4, and the key member 6. Installation method 1 for a rotating electric machine 2, as shown in Figure 5, comprises a placement step S1, a preparation step S2, a length adjustment step S3, and an insertion step S4.

[0025] (Placement step) Figure 6 is a schematic diagram of the leg portion 3 and support member 4 of the mounting structure 10 of a rotating electric machine 2 according to one embodiment. In the mounting step S1, as shown in Figure 6, the leg portion 3 is placed on the support member 4. In the mounting step S1, the first surface (bottom surface) 31 of the leg portion 3 is brought into contact with the second surface (top surface) 41 of the support member 4 such that the first groove portion 32 and the second groove portion 42 face each other. By facing the first groove portion 32 and the second groove portion 42, a keyway 5 for inserting the key member 6 is formed.

[0026] As shown in Figures 2 and 6, the first groove 32 and the second groove 42 have different groove widths (lengths in the width direction). In the illustrated embodiments, the width direction of the first groove 32 and the second groove is along the axial direction of the rotor 21. Hereinafter, the groove with a smaller groove width among the first groove 32 and the second groove 42 will be defined as the narrow groove 51, and the groove with a larger groove width among the first groove 32 and the second groove 42 will be defined as the wide groove 52. In the embodiments shown in Figures 2 and 6, the first groove 32 has a larger groove width than the second groove 42. That is, the first groove 32 is the wide groove 52, and the second groove 42 is the narrow groove 51.

[0027] The narrow groove 51 includes one end face 511 in the width direction of the narrow groove 51, the other end face 512 in the width direction of the narrow groove 51, and a groove bottom surface 513 connecting the one end face 511 and the other end face 512. Each of the one end face 511 and the other end face 512 extends from the surface on which the narrow groove 51 is formed along the depth direction (vertical direction) of the narrow groove 51.

[0028] The wide groove 52 includes one end face 521 in the width direction of the wide groove 52, the other end face 522 in the width direction of the wide groove 52, and a groove bottom surface 523 connecting the one end face 521 and the other end face 522. Each of the one end face 521 and the other end face 522 extends from the surface on which the wide groove 52 is formed along the depth direction (vertical direction) of the wide groove 52.

[0029] In the placement step S1, the leg portion 3 is placed on the support member 4 such that the narrow groove portion 51 is contained within the widthwise range of the wide groove portion 52. The widthwise range of the wide groove portion 52 extends from one end face 521 to the other end face 522 in the widthwise direction, and the one end face 511 and the other end face 512 of the narrow groove portion 51 are located within this range.

[0030] (Preparation Steps) Figure 7 is a schematic perspective view of the key member 6 (6A) prepared in preparation step S2 of the installation method 1 for a rotating electric machine 2 according to one embodiment. Preparation step S2 involves preparing the key member 6 as shown in Figure 7. The key member 6 includes a narrow portion 61 that can be fitted into the narrow groove portion 51, and a wide portion 62 having a one-sided projection 63 that protrudes to one side in the width direction from the narrow portion 61 and a other-sided projection 64 that protrudes to the other side in the width direction from the narrow portion 61. Each of the narrow portion 61 and the wide portion 62 has a rectangular cross-section perpendicular to the extending direction (longitudinal direction) of the key member 6. The key member 6 is made of a metal material, and the narrow portion 61 and the wide portion 62 are integrally formed.

[0031] The narrow portion 61 includes one end face 611 in the width direction of the narrow portion 61 and the other end face 612 in the width direction of the narrow portion 61. The wide portion 62 includes one end face 621 in the width direction of the wide portion 62, which is provided on one side in the width direction of the narrow portion 61 beyond the end face 611 of the narrow portion 61, and the other end face 622 in the width direction of the wide portion 62, which is provided on the other side in the width direction of the narrow portion 61 beyond the end face 612 of the narrow portion 61. Note that the preparation step S2 may be performed before the placement step S1 or after the placement step S1.

[0032] As shown in Figure 6, the widthwise length of the narrow groove 51 is defined as LN, and the widthwise length of the wide groove 52 is defined as LW. Furthermore, the distance from one end face 521 in the widthwise direction of the wide groove 52 to one end face 511 in the widthwise direction of the narrow groove 51 in the keyway 5 is defined as D1, and the distance from the other end face 522 in the widthwise direction of the wide groove 52 to the other end face 512 in the widthwise direction of the narrow groove 51 in the keyway 5 is defined as D2.

[0033] As shown in Figure 7, the key member 6 prepared in preparation step S2 is defined as the reference key member 6A. The widthwise length of the narrow portion 61 of the reference key member 6A is defined as LN1, and the widthwise length of the wide portion 62 of the reference key member 6A is defined as LW0. Furthermore, the widthwise length of the one-sided projection 63 of the reference key member 6A, that is, the distance from one end face 611 in the widthwise direction of the narrow portion 61 to one end face 621 in the widthwise direction of the wide portion 62 (widthwise distance), is defined as LP1, and the widthwise length of the other-sided projection 64 of the reference key member 6A, that is, the distance from the other end face 612 in the widthwise direction of the narrow portion 61 to the other end face 622 in the widthwise direction of the wide portion 62 (widthwise distance), is defined as LP2.

[0034] The widthwise length LN1 of the narrow portion 61 of the reference key member 6A is the same as, or shorter than, the widthwise length LN of the narrow groove portion 51. The widthwise length LW0 of the wide portion 62 of the reference key member 6A is longer than the widthwise length LW of the wide groove portion 52.

[0035] (Length adjustment step) Figure 8 is a schematic perspective view of the key member 6(6B) after the length adjustment step S3 of the installation method 1 for the rotating electric machine 2 according to one embodiment. Figure 9 is a schematic diagram of the installation structure 10 for the rotating electric machine 2 according to one embodiment. In the length adjustment step S3, at least one of the protruding portion 63 on one side or the protruding portion 64 on the other side of the key member 6(6A) is shortened so that it can be fitted into the wide groove portion 52. The key member 6 after the length adjustment step S3 is referred to as the adjusted key member 6B.

[0036] As shown in Figure 8, the widthwise length of the wide portion 62 of the adjusted key member 6B is defined as LW1. The widthwise length of the one-sided protrusion 63 of the adjusted key member 6B, that is, the distance from one end face 611 in the widthwise direction of the narrow portion 61 to one end face 621A in the widthwise direction of the wide portion 62 (widthwise distance), is defined as LP3, and the widthwise length of the other-sided protrusion 64 of the adjusted key member 6B, that is, the distance from the other end face 612 in the widthwise direction of the narrow portion 61 to the other end face 622A in the widthwise direction of the wide portion 62 (widthwise distance), is defined as LP4. The widthwise length LW1 of the wide portion 62 of the adjusted key member 6B is the same as, or shorter than, the widthwise length LW of the wide groove portion 52. Note that in the adjusted key member 6B, one of the one-sided protrusion 63 or the other-sided protrusion 64 may be cut off and removed in the length adjustment step S3.

[0037] (Insertion step) In insertion step S4, as shown in Figure 9, after the length adjustment step S3, the key member 6 (6B, see Figure 8) is inserted into the keyway 5 formed by the first groove 32 and the second groove 42. The narrow portion 61 of the adjusted key member 6B is inserted into the narrow groove 51 of the keyway 5, and the wide portion 62 of the adjusted key member 6B is inserted into the wide groove 52 of the keyway 5.

[0038] According to the above-described installation method 1 for the rotating electric machine 2, when the leg portion 3 is placed on the support member 4, the relative position of the wide groove portion 52 with respect to the narrow groove portion 51 may shift in the width direction of the wide groove portion 52. By shortening the length of at least one of the protruding portion 63 on one side or the protruding portion 64 on the other side of the key member 6 according to the relative position of the wide groove portion 52 with respect to the narrow groove portion 51 after the leg portion 3 is placed on the support member 4, the wide portion 62 of the key member 6 can be fitted into the wide groove portion 52. According to the above method, if the positional shift between the wide groove portion 52 and the narrow groove portion 51 is within an amount that can be corrected in the length adjustment step S3, the key member 6 can be fitted into the keyway 5. Therefore, according to the above method, the workability of the installation work can be improved when a positional shift occurs during the installation of the rotating electric machine 2.

[0039] Furthermore, according to the above method, by adjusting the length of the one-sided protrusion 63 and the other-sided protrusion 64 in the length adjustment step S3, the gap between the wide groove 52 and the wide section 62 can be reduced. By reducing the gap between the wide groove 52 and the wide section 62, the key member 6 fitted into the keyway 5 can suppress thermal expansion due to the heat generated during the operation of the rotating electric machine 2 from an early stage.

[0040] When the widthwise length of the wide groove 52 described above is defined as LW (see Figure 6), and the widthwise length of the wide section 62 after the length adjustment step S3 is defined as LW1 (see Figure 8), it is preferable that the length LW1 of the wide section 62 satisfies the condition 0.95 × LW ≤ LW1 ≤ LW. When the length LW1 of the wide section 62 satisfies the above condition, the gap between the wide groove 52 and the wide section 62 when the wide section 62 is fitted into the wide groove 52 becomes small. As a result, the thermal expansion of the key member 6 (6B) fitted into the keyway 5 due to the heat during operation of the rotating electric machine 2 can be suppressed from an early stage.

[0041] When the widthwise length of the narrow groove 51 described above is defined as LN (see Figure 6), and the widthwise length of the narrow portion 61 of the key member 6 (6A) prepared in preparation step S2 is defined as LN1, it is preferable that the length LN1 of the narrow portion 61 satisfies the condition 0.95 × LN ≤ LN1 ≤ LN. If the length LN1 of the narrow portion 61 satisfies the above condition, the narrow portion 61 can be fitted into the narrow groove 51 without further machining of the keyway 5 or key member 6 after preparation step S2. Also, if the length LN1 of the narrow portion 61 satisfies the above condition, the gap between the narrow groove 51 and the narrow portion 61 when the narrow portion 61 is fitted into the narrow groove 51 will be small. As a result, thermal expansion of the key member 6 fitted into the keyway 5 due to the heat during operation of the rotating electric machine 2 can be suppressed from an early stage.

[0042] In some embodiments, the length adjustment step S3 described above includes, as shown in Figure 5, a first measurement step S31 for measuring the distance D1 (see Figure 6), a second measurement step S32 for measuring the distance D2 (see Figure 6), and cutting steps S34 and S36 for shortening at least one of the protrusions 63 on one side or 64 on the other side of the key member 6 by cutting them, depending on the measurement results of the first measurement step S31 and the second measurement step S32.

[0043] In the first measurement step S31, the distance D1 from one end face 521 in the width direction of the wide groove 52 to one end face 511 in the width direction of the narrow groove 51 in the keyway 5 is measured. If the distance LP1 from one end face 611 in the width direction of the narrow section 61 of the reference key member 6A to one end face 621 in the width direction of the wide section 62 (width direction distance) is unknown, the distance LP1 may be measured in the length adjustment step S3.

[0044] If distance LP1 is greater than distance D1 (YES in step S33), the protruding portion 63 on one side is cut to shorten it (cutting step S34). As shown in Figure 8, the tip portion (cutting area CA1) of the protruding portion 63 on one side is removed by the cutting process in cutting step S34, so the length in the width direction of the protruding portion 63 on one side after cutting (distance LP3) is shorter than the length in the width direction before cutting (distance LP1). The above distance LP3 is the distance (width direction distance) from the end face 611 on one side in the width direction of the narrow portion 61 to the end face 621A on one side in the width direction of the wide portion 62 (tip face after cutting). The tip face 621A after cutting has a cut mark 623 created by the cutting process in cutting step S34.

[0045] In cutting step S34, the portion to be cut off from the one-sided protrusion 63 (cut area CA1) may be adjusted so that the distance LP3 satisfies the condition 0.95 × D1 ≤ LP3 ≤ D1. If the distance LP1 is the same as or less than the distance D1 (NO in step S33), no length adjustment of the one-sided protrusion 63 is necessary.

[0046] In the second measurement step S32, the distance D2 from the other end face 522 in the width direction of the wide groove 52 to the other end face 512 in the width direction of the narrow groove 51 in the keyway 5 is measured. If the distance LP2 from the other end face 612 in the width direction of the narrow section 61 of the reference key member 6A to the other end face 622 in the width direction of the wide section 62 (width direction distance) is unknown, the distance LP2 may be measured in the length adjustment step S3.

[0047] If distance LP2 is greater than distance D2 (YES in step S35), the other side projection 64 is cut to shorten it (cutting step S36). As shown in Figure 8, the tip portion (cutting area CA2) of the other side projection 64 is removed by the cutting process in cutting step S36, so the length in the width direction of the other side projection 64 after cutting (distance LP4) is shorter than the length in the width direction before cutting (distance LP2). The above distance LP4 is the distance (width direction distance) from the other side end face 612 in the width direction of the narrow section 61 to the other side end face (tip face after cutting) 622A of the wide section 62 in the width direction. The tip face 622A after cutting has a cut mark 624 created by the cutting process in cutting step S36.

[0048] In cutting step S36, the portion to be cut off from the other side projection 64 (cut area CA2) may be adjusted so that the distance LP4 satisfies the condition 0.95 × D2 ≤ LP4 ≤ D2. If the distance LP2 is the same as or less than the distance D2 (NO in step S35), no length adjustment of the other side projection 64 is necessary.

[0049] Each of the end faces 621A(621) on one side and 622A(622) on the other side of the wide portion 62 extends along a direction that intersects (orthogonal in the illustrated example) the width direction of the wide portion 62.

[0050] In the first measurement step S31, the distance D1 is actually measured to determine the appropriate length in the width direction of the one-sided protrusion 63 for fitting into the wide groove 52. In the second measurement step S32, the distance D2 is actually measured to determine the appropriate length in the width direction of the other-sided protrusion 64 for fitting into the wide groove 52. In the cutting steps S34 and S36, the unnecessary tip portions (cutting areas CA1 and CA2) of the one-sided protrusion 63 and the other-sided protrusion 64 are cut off according to the measurement results of the first measurement step S31 and the second measurement step S32, thereby making the length in the width direction of the one-sided protrusion 63 and the other-sided protrusion 64 an appropriate length that minimizes the gap between them and the end faces 521 and 522 of the wide groove 52. As a result, thermal expansion of the key member 6 fitted into the keyway 5 due to the heat during operation of the rotating electric machine 2 can be suppressed from an early stage.

[0051] In some embodiments, as shown in Figures 2, 6, and 9, the first groove 32 described above has a wider groove width than the second groove 42 described above. That is, the first groove 32 is a wide groove 52, and the second groove 42 is a narrow groove 51. In this case, by making the groove width of the first groove 32 provided on the leg portion 3 placed on the support member 4 larger than the groove width of the second groove 42 provided on the support member 4, it is possible to prevent the leg portion 3 from contacting the corner on the second surface 41 side of the second groove 42 and damaging the corner when the leg portion 3 is placed on the support member 4.

[0052] Figure 10 is a schematic diagram of the mounting structure 10 of the rotating electric machine 2 according to one embodiment. In some embodiments, as shown in Figure 10, the first groove 32 described above may have a smaller groove width than the second groove 42 described above. That is, the first groove 32 may be a narrow groove 51 and the second groove 42 may be a wide groove 52.

[0053] (Installation structure of rotating electric machinery) As shown in Figures 9 and 10, the mounting structure 10 for the rotating electric machine 2 includes the above-described leg portion 3 having a first surface 31 on which a first groove portion 32 is formed, the above-described support member 4 having a second surface 41 on which a second groove portion 42 is formed, on which the leg portion 3 is placed such that the above-described narrow groove portion 51 fits within the widthwise range of the above-described wide groove portion 52, and the above-described key member 6 including a narrow portion 61 fitted into the narrow groove portion 51 and a wide portion 62 fitted into the wide groove portion 52. The wide portion 62 of the key member 6 has the above-described one-sided protrusion 63 and the above-described other-sided protrusion 64, and at least one of the tip surfaces 621A, 622A of the one-sided protrusion 63 or the other-sided protrusion 64 has cut marks 623, 624.

[0054] According to the above configuration, when the leg portion 3 is placed on the support member 4, the relative position of the wide groove portion 52 with respect to the narrow groove portion 51 may shift in the width direction of the wide groove portion 52. By shortening the length of at least one of the one-sided protrusion portion 63 or the other-sided protrusion portion 64 of the key member 6 according to the relative position of the wide groove portion 52 with respect to the narrow groove portion 51 after the leg portion 3 is placed on the support member 4, the wide portion 62 of the key member 6 can be fitted into the wide groove portion 52. When the length of at least one of the one-sided protrusion portion 63 or the other-sided protrusion portion 64 is shortened, cut marks 623 and 624 are formed on the tip surfaces 621A and 622A. Tip surfaces 621A and 622A having cut marks 623 and 624 are highly likely to have undergone length adjustment of the one-sided protrusion portion 63 or the other-sided protrusion portion 64. If the misalignment between the wide groove 52 and the narrow groove 51 can be corrected by adjusting the length of the protrusion 63 on one side or the protrusion 64 on the other side, the key member 6 can be fitted into the keyway 5. Therefore, with the above configuration, the workability of the installation work can be improved when a misalignment occurs during the installation of the rotating electric machine 2.

[0055] With the above configuration, the gap between the wide groove 52 and the wide section 62 can be reduced by adjusting the length of the protrusion 63 on one side and the protrusion 64 on the other side. By reducing the gap between the wide groove 52 and the wide section 62, the key member 6 fitted into the keyway 5 can suppress thermal expansion due to the heat generated during the operation of the rotating electric machine 2 from an early stage.

[0056] In this specification, expressions describing relative or absolute arrangements such as "in a certain direction," "along a certain direction," "parallel," "orthogonal," "center," "concentric," or "coaxial" shall not only describe such arrangements strictly, but also describe states of relative displacement with tolerances or angles or distances that allow for the same function to be achieved. For example, expressions such as "identical," "equal," and "homogeneous" that describe things being in an equal state not only describe a state of being strictly equal, but also describe a state in which there is a tolerance or a difference that is sufficient to achieve the same function. Furthermore, in this specification, expressions describing shapes such as quadrilaterals and cylindrical shapes shall not only represent geometrically precise quadrilaterals and cylindrical shapes, but also shapes that include uneven surfaces, chamfered surfaces, etc., to the extent that the same effect can be achieved. Furthermore, in this specification, the expressions “equipment,” “includes,” or “possess” of a component are not exclusive expressions that exclude the existence of other components.

[0057] This disclosure is not limited to the embodiments described above, but also includes modified forms of the embodiments described above, as well as forms that combine these forms as appropriate.

[0058] The contents described in some of the embodiments above can be understood, for example, as follows:

[0059] 1) A method for installing a rotating electric machine according to at least one embodiment of the present disclosure (1) is, A method (1) for installing a rotating electric machine (2), comprising a rotor (21), a stator (22) arranged to surround the rotor (21), and a casing (23) configured to house the rotor (21) and the stator (22), A mounting step (S1) is provided on the casing (23) and has a leg portion (3) having a first surface (31) formed with a first groove portion (32) extending along a first direction intersecting the axial direction of the rotor (21), and the mounting step (S1) is provided on the casing (23) and has a support member (4) having a second surface (41) formed with a second groove portion (42) extending along the first direction, wherein the leg portion (3) is placed on the support member (4) such that the narrow groove portion (51) of the first groove portion (32) or the second groove portion (42), which has a larger groove width, is contained within the width range of the wide groove portion (52) of the first groove portion (32) or the second groove portion (42), Preparation step (S2) to prepare a key member (6) including a narrow portion (61) that can be fitted into the narrow groove portion (51), and a wide portion (62) having a one-sided projection (63) that protrudes to one side in the width direction from the narrow portion (61) and a other-sided projection (64) that protrudes to the other side in the width direction from the narrow portion (61), Following the placement step (S1), a length adjustment step (S3) is performed to shorten at least one of the one-sided protrusion (63) or the other-sided protrusion (64) of the key member (6) so that it can be fitted into the wide groove (52), The device includes, after the length adjustment step (S3), an insertion step (S4) in which the key member (6) is inserted into the keyway (5) formed by the first groove (32) and the second groove (42).

[0060] According to method 1) above, when the leg portion (3) is placed on the support member (4), the relative position of the wide groove portion (52) with respect to the narrow groove portion (51) may shift in the width direction of the wide groove portion (52). By shortening the length of at least one of the protruding portions (63) on one side or (64) on the other side of the key member (6) according to the relative position of the wide groove portion (52) with respect to the narrow groove portion (51) after the leg portion (3) is placed on the support member (4), the wide portion (62) of the key member (6) can be fitted into the wide groove portion (52). According to method 1) above, if the positional misalignment between the wide groove portion (52) and the narrow groove portion (51) is within an amount that can be corrected in the length adjustment step (S3), the key member (6) can be fitted into the keyway (5). Therefore, according to method 1) above, the workability of the installation work can be improved when a positional misalignment occurs during the installation of the rotating electric machine (2).

[0061] Furthermore, according to the method described in 1) above, the gap between the wide groove (52) and the wide section (62) can be reduced by adjusting the length of the one-sided protrusion (63) and the other-sided protrusion (64) in the length adjustment step (S3). By reducing the gap between the wide groove (52) and the wide section (62), the thermal expansion of the key member (6) fitted into the keyway (5) due to the heat generated during the operation of the rotating electric machine (2) can be suppressed from an early stage.

[0062] 2) In some embodiments, the method for installing a rotating electric machine described in 1) above (1), When the length of the wide groove (52) in the width direction is defined as LW, and the length of the wide portion (62) in the width direction after the length adjustment step (S3) is defined as LW1, the length LW1 of the wide portion (62) satisfies the condition 0.95 × LW ≤ LW1 ≤ LW.

[0063] According to the method described in 2) above, if the length LW1 of the wide portion (62) satisfies the above conditions, the gap between the wide groove portion (52) and the wide portion (62) when the wide portion (62) is fitted into the wide groove portion (52) will be small. As a result, the key member (6) fitted into the keyway (5) can suppress thermal expansion due to the heat during operation of the rotating electric machine (2) from an early stage.

[0064] 3) In some embodiments, the method for installing a rotating electric machine described in 1) or 2) above (1), When the widthwise length of the narrow groove portion (51) is defined as LN, and the widthwise length of the narrow portion (61) of the key member (6) prepared in the preparation step (S2) is defined as LN1, the length LN1 of the narrow portion (61) satisfies the condition 0.95 × LN ≤ LN1 ≤ LN.

[0065] According to method 3) above, if the length LN1 of the narrow portion (61) satisfies the above conditions, the narrow portion (61) can be fitted into the narrow groove portion (51) without additional machining of the keyway (5) or key member (6) after the preparation step (S2). Furthermore, according to method 3) above, if the length LN1 of the narrow portion (61) satisfies the above conditions, the gap between the narrow groove portion (51) and the narrow portion (61) when the narrow portion (61) is fitted into the narrow groove portion (51) will be small. As a result, thermal expansion of the key member (6) fitted into the keyway (5) due to the heat during operation of the rotating electric machine (2) can be suppressed from an early stage.

[0066] 4) In some embodiments, the method of installing a rotating electric machine (1) described in any of 1) to 3) above, The first groove (32) has a wider groove width than the second groove (42).

[0067] According to the method described in 4) above, by making the width of the first groove (32) provided in the leg portion (3) placed on the support member (4) larger than the width of the second groove (42) provided in the support member (4), it is possible to suppress the leg portion (3) from coming into contact with the corner on the second surface (41) side of the second groove (42) when the leg portion (3) is placed on the support member (4) and damaging the corner.

[0068] 5) In some embodiments, the method of installing a rotating electric machine (1) described in any of 1) to 4) above, The length adjustment step (S3) is performed as follows: A first measurement step (S31) is to measure the distance (D1) from one end face (521) in the width direction of the wide groove portion (52) in the keyway (5) to one end face (511) in the width direction of the narrow groove portion (51), The second measurement step (S32) includes measuring the distance (D2) from the other end face (522) in the width direction of the wide groove portion (52) in the keyway (5) to the other end face (512) in the width direction of the narrow groove portion (51), The method includes a cutting step (S34, S36) in which, depending on the measurement results of the first measurement step (S31) and the second measurement step (S32), at least one of the one-sided protrusion (63) or the other-sided protrusion (64) of the key member (6) is cut to shorten it.

[0069] According to the method described in 5) above, by actually measuring the distance (D1) in the first measurement step (S31), the appropriate length in the width direction of the one-sided projection (63) for fitting into the wide groove (52) can be determined. By actually measuring the distance (D2) in the second measurement step (S32), the appropriate length in the width direction of the other-sided projection (64) for fitting into the wide groove (52) can be determined. In the cutting steps (S34, S36), by cutting off the unnecessary tip portions of the one-sided projection (63) and the other-sided projection (64) according to the measurement results of the first measurement step (S31) and the second measurement step (S32), the length in the width direction of the one-sided projection (63) and the other-sided projection (64) can be made to an appropriate length that minimizes the gap between them and the end faces (521, 522) of the wide groove (52). This allows the key member (6) fitted into the keyway (5) to suppress thermal expansion caused by the heat generated during the operation of the rotating electric machine (2) from an early stage.

[0070] 6) The mounting structure (10) of a rotating electric machine according to at least one embodiment of the present disclosure is: An installation structure (10) for a rotating electric machine (2) comprising a rotor (21), a stator (22) arranged to surround the rotor (21), and a casing (23) configured to house the rotor (21) and the stator (22), The casing (23) is provided with a leg portion (3) having a first surface (31) on which a first groove portion (32) is formed, extending along a first direction intersecting the axial direction of the rotor (21), A support member (4) having a second surface (41) on which a second groove (42) extending along the first direction is formed, wherein the leg portion (3) is placed on the support member (4) such that the narrow groove (51) of the first groove (32) or the second groove (42), which has a larger groove width, is contained within the widthwise range of the wide groove (52) of the first groove (32) or the second groove (42), The key member (6) includes a narrow portion (61) fitted into the narrow groove (51) and a wide portion (62) fitted into the wide groove (52), The wide portion (62) of the key member (6) has a one-sided protrusion (63) that protrudes to one side in the width direction more than the narrow portion (61) and a other-sided protrusion (64) that protrudes to the other side in the width direction more than the narrow portion (61), At least one of the tip surfaces (621A, 622A) of the one-sided projection (63) or the other-sided projection (64) has cut marks (623, 624).

[0071] According to the configuration in 6) above, when the leg portion (3) is placed on the support member (4), the relative position of the wide groove portion (52) with respect to the narrow groove portion (51) may shift in the width direction of the wide groove portion (52). By shortening the length of at least one of the one-sided projection portion (63) or the other-sided projection portion (64) of the key member (6) according to the relative position of the wide groove portion (52) with respect to the narrow groove portion (51) after the leg portion (3) is placed on the support member (4), the wide portion (62) of the key member (6) can be fitted into the wide groove portion (52). When shortening the length of at least one of the one-sided projection portion (63) or the other-sided projection portion (64), cut marks (623, 624) are formed on the tip surfaces (621A, 622A). According to the configuration in 6) above, the tip surfaces (621A, 622A) having cut marks (623, 624) are highly likely to have undergone length adjustment of either the one-sided projection (63) or the other-sided projection (64). If the misalignment between the wide groove (52) and the narrow groove (51) can be compensated for by adjusting the length of either the one-sided projection (63) or the other-sided projection (64), the key member (6) can be fitted into the keyway (5). Therefore, according to the configuration in 6) above, the workability of the installation work can be improved when misalignment occurs during the installation of the rotating electric machine (2).

[0072] According to the configuration in 6) above, the gap between the wide groove (52) and the wide section (62) can be reduced by adjusting the length of the protrusion on one side (63) and the protrusion on the other side (64). By reducing the gap between the wide groove (52) and the wide section (62), the key member (6) fitted into the keyway (5) can suppress thermal expansion due to the heat generated during the operation of the rotating electric machine (2) from an early stage. [Explanation of symbols]

[0073] 1. Installation method for rotating electric machines 2 Rotating Electric Machines 3 legs 4. Support members 5.05 Keyway 6.06 Key Member 6A Reference key member 6B Adjusted key component 10,010 Installation structure of rotating electric machines 11 Installation location 12 Floor surface 13 recess 21 Rotor 22 Stator 23 Casing 24 Casing body 31 Page 1 32,032 First groove 41 Side 2 42,042 Second groove 51 Narrow groove 52 Wide groove section 61 Narrow part 62 Wide section 63 One side protrusion 64 Other side protrusion 623,624 Cutting marks CA1,CA2 Area to be cut LA axis LN Width of the narrow groove LN1 Width of the narrow section LP1, LP3 Length in the width direction of the protruding part on one side LP2, LP4 Length in the width direction of the other side projection LW: Width of the wide groove section LW1 Width of the wide section S1 Placement step S2 Preparation Steps S3 Length adjustment step S4 Insertion Step S31 First measurement step S32 Second measurement step S34, S36 Cutting Step

Claims

1. A method for installing a rotating electric machine comprising a rotor, a stator arranged to surround the rotor, and a casing configured to house the rotor and the stator, A mounting step comprising placing a leg portion, which has a first groove portion extending along a first direction intersecting the axial direction of the rotor and a first surface extending in the axial direction, on a support member having a second groove portion extending along the first direction and a second surface extending in the axial direction, wherein the leg portion is placed on the support member such that the narrow groove portion of the first groove portion or the second groove portion, which has a larger groove width, is contained within the widthwise range of the wide groove portion of the first groove portion or the second groove portion, A preparation step of preparing a key member including a narrow portion that can be fitted into the narrow groove, and a wide portion having a one-sided projection that protrudes to one side in the width direction from the narrow portion and a other-sided projection that protrudes to the other side in the width direction from the narrow portion, After the placement step, a length adjustment step is performed to shorten at least one of the one-sided protrusion or the other-sided protrusion of the key member so that it can be fitted into the wide groove. The method further includes, after the length adjustment step, an insertion step of inserting the key member into the keyway formed by the first groove and the second groove, Installation method for rotating electric machinery.

2. When the length of the wide groove in the width direction is defined as LW, and the length of the wide portion in the width direction after the length adjustment step is defined as LW1, the length LW1 of the wide portion satisfies the condition 0.95 × LW ≤ LW1 ≤ LW. A method for installing a rotating electric machine as described in claim 1.

3. When the widthwise length of the narrow groove is defined as LN, and the widthwise length of the narrow part of the key member prepared in the preparation step is defined as LN1, the length LN1 of the narrow part satisfies the condition 0.95 × LN ≤ LN1 ≤ LN. A method for installing a rotating electric machine according to claim 1 or 2.

4. The first groove has a wider groove width than the second groove. A method for installing a rotating electric machine according to claim 1 or 2.

5. A method for installing a rotating electric machine comprising a rotor, a stator arranged to surround the rotor, and a casing configured to house the rotor and the stator, A mounting step comprising placing a leg portion, provided on the casing and having a first surface formed with a first groove portion extending along a first direction intersecting the axial direction of the rotor, onto a support member having a second surface formed with a second groove portion extending along the first direction, wherein the leg portion is placed on the support member such that the narrow groove portion of the first or second groove portion, which has a larger groove width, is contained within the widthwise range of the wide groove portion of the first or second groove portion, A preparation step of preparing a key member including a narrow portion that can be fitted into the narrow groove, and a wide portion having a one-sided projection that protrudes to one side in the width direction from the narrow portion and a other-sided projection that protrudes to the other side in the width direction from the narrow portion, After the placement step, a length adjustment step is performed to shorten at least one of the one-sided protrusion or the other-sided protrusion of the key member so that it can be fitted into the wide groove. The process includes, after the length adjustment step, an insertion step of inserting the key member into the keyway formed by the first groove and the second groove, The length adjustment step is, A first measurement step involves measuring the distance from one end face in the width direction of the wide groove portion to one end face in the width direction of the narrow groove portion in the keyway, A second measurement step involves measuring the distance from the other end face in the width direction of the wide groove portion to the other end face in the width direction of the narrow groove portion in the keyway, A method for installing a rotating electric machine, comprising a cutting step of cutting and shortening at least one of the one-sided protrusion or the other-sided protrusion of the key member according to the measurement results of the first and second measurement steps.

6. An installation structure for a rotating electric machine comprising a rotor, a stator arranged to surround the rotor, and a casing configured to house the rotor and the stator, A support member provided on the casing, having a leg portion having a first groove portion extending along a first direction intersecting the axial direction of the rotor and a first surface extending in the axial direction, and having a second groove portion extending along the first direction and a second surface extending in the axial direction, wherein the leg portion is placed on the support member such that the narrow groove portion of the first groove portion or the second groove portion, which has a larger groove width, is contained within the widthwise range of the wide groove portion of the first groove portion or the second groove portion, A key member comprising a narrow portion fitted into the narrow groove and a wide portion fitted into the wide groove, The wider portion of the key member has a protruding portion on one side in the width direction that protrudes more than the narrower portion, and a protruding portion on the other side in the width direction that protrudes more than the narrower portion. At least one of the tip surfaces of the one side projection or the other side projection has a cut mark. Installation structure for rotating electric machines.

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