Wedge insertion machine for rotor and wedge insertion method for rotor

Abstract

The wedge insertion machine (10) comprises: a pressing device (11) arranged outside a slot (21) in a radial direction (X), wherein the pressing device (11) has a pressure element (11A) capable of moving in an axial direction (Z) of a rotor (100); an insertion device (14) arranged outside the slot (21) in the radial direction (X), wherein the insertion device (14) is moved in the axial direction (Z) by the pressing device (11), presses a wedge (7) in the axial direction (Z) and is fitted inside the slot (21); a pressure sensor (13) that measures the pressure force with which the pressure element (11A) presses the wedge (7) in the axial direction (Z) over the insertion device (14); and a reaction force sensor (50) that receives the reaction force of the pressing device (11) which presses the wedge (7) over the insertion device (14).

Description

TECHNICAL AREA

[0001] The present disclosure relates to a wedge insertion machine for a rotor and a wedge insertion method for a rotor. TECHNOLOGICAL BACKGROUND

[0002] Generally, the rotor core of a rotating electrical machine is provided with a multitude of slots, which extend axially and are arranged circumferentially. Rotor coils are housed in these slots, and wedges are inserted on the outer surfaces of the rotor coils in a radial direction. These wedges prevent the rotor coils from shifting or being displaced radially outwards during rotation of the rotor.

[0003] To suppress vibration during low-speed rotor rotation and to prevent the generation of abrasive dust from the coils, it is necessary to insert the wedges while applying a compressive force that pushes the rotor coils radially inward within a predetermined range. Because multiple wedges are inserted into each slot, each wedge must be inserted by pushing, pressing, hammering, or using an insertion device.

[0004] For example, a device for inserting such wedges into a rotor is known as an arm-like wedge insertion machine, which is disclosed in patent document 1. QUOTE LIST PATENT DOCUMENT

[0005] Patent document 1: Published Japanese patent with publication number H4-229038 SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED BY THE INVENTION

[0006] The wedge insertion machine for the rotor of a rotating electric machine, disclosed in patent document 1, inserts a wedge by moving an arm a predetermined distance. Manual operation of the arm by the operator is required, and therefore a problem arose in that the machine cannot accommodate cases where a large wedge insertion force is required. Furthermore, the length over which the wedge can be inserted through the arm at one time is short, for example, approximately 2 inches. To insert a wedge over a longer distance, it is necessary to loosen the device's mounting, move it, and remount it, which involves labor and results in increased operating time.

[0007] The present disclosure was made to solve the above-mentioned problem, and one objective of the present disclosure is to provide a wedge insertion machine for a rotor and a wedge insertion method for a rotor which have a large wedge insertion force and which can reduce working time. MEANS TO SOLVE THE PROBLEM

[0008] The wedge insertion machine for a rotor disclosed in the present disclosure is a wedge insertion machine for a rotor which inserts a wedge which presses a coil, which is housed within a slot of a rotor core, towards an inside in a radial direction of the rotor, wherein the slot has slot groove sections, each of which is recessed in a circumferential direction and extends in an axial direction, on both side surfaces in the circumferential direction, which are located outside the coil in the radial direction, the wedge has wedge projections that are inserted into the slot groove sections and that project in the circumferential direction and extend in the axial direction, The wedge insertion machine is equipped with: a pressing device which is arranged outside the slot in the radial direction and which has a pressure part which is movable in an axial direction of the rotor, an insertion device arranged outside the slot in the radial direction, which moves in the axial direction through the pressing device, which presses the wedge in the axial direction and fits the wedge into the slot, a pressure sensor that measures a pressure force with which the pressure part pushes the wedge in the axial direction over the insertion device, and a reaction force transducer that detects a reaction force with which the pressing device presses the wedge over the insertion device.

[0009] The wedge insertion method for a rotor disclosed in the present disclosure is a wedge insertion method for a rotor using the wedge insertion machine for a rotor according to any one of claims 1 to 5, wherein the method comprises: a step of temporarily inserting the wedge into the slot, one step of positioning the wedge insertion machine at an opening of the slot, and a step of pressing the insertion device in the axial direction, while a pressure force of the pressure part is measured by the pressure sensor. IMPACT OF THE INVENTION

[0010] According to the wedge insertion machine for a rotor and the wedge insertion method for a rotor disclosed in the present disclosure, it is possible to provide a wedge insertion machine for a rotor and a wedge insertion method for a rotor which have a large wedge insertion force and which can reduce working time. BRIEF DESCRIPTION OF THE DRAWINGS [ Fig. 1] Fig. Figure 1 shows a perspective view of a rotor of a rotating electric machine according to embodiment 1. [ Fig. 2] Fig. Figure 2 shows an enlarged view of a main part of the rotor core according to embodiment 1. [ Fig. 3] Fig. Figure 3 shows an enlarged view of the area surrounding a first slot of the rotor core viewed in the axial direction according to embodiment 1. [ Fig. 4] Fig. Figure 4 shows a cross-sectional view along a line AA in Fig. 3 dar. [ Fig. 5] Fig. Figure 5 shows a perspective view of the wedge according to embodiment 1. [ Fig. 6] Fig. Figure 6 shows a perspective view of a state where the wedge insertion machine for a rotor according to embodiment 1 is attached to an opening of a slot. [ Fig. 7] Fig. Figure 7 shows a cross-sectional view along a line BB in Fig. 6 dar. [ Fig. 8] Fig. Figure 8 shows a perspective view of a reaction force-absorbing wedge according to embodiment 1. [ Fig. 9] Fig. Figure 9 represents a flowchart showing the steps of the wedge insertion procedure for a rotor according to embodiment 1. [ Fig. 10] Fig. Figure 10 shows a cross-sectional view showing a state where a coil is inserted into a slot of the rotor core according to embodiment 1. [ Fig. 11] Fig. Figure 11 shows a cross-sectional view showing a state where an insulator is arranged and a wedge is temporarily inserted into a slot of the rotor core according to embodiment 1. [ Fig. 12] Fig. Figure 12 shows a cross-sectional view showing a state where an insertion device is attached to a temporarily inserted wedge and the wedge insertion machine is attached to the rotor core according to embodiment 1. [ Fig. 13] Fig. Figure 13 shows a cross-sectional view of a state where a wedge has been inserted into a predetermined position, according to embodiment 1. [ Fig. 14] Fig. Figure 14 shows a perspective view of a state where a wedge insertion machine according to embodiment 2 is attached to an opening of a slot. [ Fig. 15] Fig. Figure 15 shows a cross-sectional view along a line CC in Fig. 14 dar. [ Fig. 16] Fig. Figure 16 shows a perspective view of a state where a wedge insertion machine according to embodiment 3 is attached to an opening of a slot. [ Fig. 17] Fig. Figure 17 shows a cross-sectional view along a line DD in Fig. 16 dar. DESCRIPTION OF EXECUTION FORMSExecution form 1.

[0011] A wedge insertion machine for a rotor and a wedge insertion method for a rotor according to embodiment 1 will be described below with reference to the drawings.

[0012] In this description, the terms “axial direction”, “circumferential direction”, “radial direction”, “inside”, “outside”, and “outer circumferential surface” refer to the axial direction, circumferential direction, radial direction, inner side, outer side, and outer circumferential surface of the rotor, respectively, unless otherwise specified. Unless otherwise specified in this description, the terms “top” and “bottom” refer to a conceptual plane perpendicular to the axial direction at the location in question, with “bottom” referring to the side encompassing the center of the rotor and “top” referring to the opposite side.

[0013] First, with reference to the drawings, a rotor of a rotating electric machine is described, to which the wedge insertion machine and the wedge insertion method for a rotor can be applied in a suitable manner.

[0014] Fig. Figure 1 shows a perspective view of a rotor 100 of a rotating electric machine.

[0015] Fig. Figure 2 shows an enlarged view of a main part of a rotor core 20.

[0016] Fig. Figure 3 shows a view of the rotor core of rotor 100 viewed in the axial direction Z and shows an enlarged view of the surroundings of a slot 21.

[0017] Fig. Figure 4 shows a cross-sectional view along a line AA in Fig. Figure 3 shows the configuration of a wedge 7, an insulator 8 and a coil 9.

[0018] Fig. Figure 5 shows a perspective view of wedge 7.

[0019] Slots 21 are formed on the outer circumferential surface 22 of the rotor core 20. These slots are directed radially X inwards and extend axially Z along the rotor core 20. A plurality of the slots 21 are formed along the circumferential Y of the outer circumferential surface 22.

[0020] Each of the slots 21 houses a coil 9, and an insulator 8 is located in the radial direction X on the outside (top side). Fig. 4) of the coil 9. Furthermore, a wedge 7 is inserted in the radial direction X on another outer side of the insulator 8 to press or push the coil 9 in the radial direction X towards the inside, so that the coil 9 does not spring outwards in the radial direction X, and the wedge is fitted into the slot 21.

[0021] Each of the slots 21 has slotted groove sections 21M formed in the circumferential direction Y on both side surfaces 21S on the outside in the radial direction X relative to the housed coil 9 and the insulator 8. The slotted groove sections 21M are designed to extend in the axial direction Z and along the entire axial length of the slot 21. Wedge projections 7T are provided on both side surfaces in the circumferential direction Y of the wedge 7, projecting in the circumferential direction Y and extending in the axial direction Z, and being inserted into the slotted groove sections 21M described above.

[0022] The wedge projections 7T of the wedge 7 described above are inserted in the axial direction Z into the two slot groove sections 21M, so that they close the opening of the slot 21.

[0023] The wedge 7 further comprises two wedge holes 7H extending in the radial direction X. The wedge 7 is inserted and fitted in the radial direction X on the outside of the insulator 8. In sections where the insulator 8 is not located, the wedge 7 is designed to have a fit that allows it to move in the axial direction Z along the slot groove sections 21M in the slot 21.

[0024] The insulator 8 is a plate-like element and extends in the axial direction Z along both side surfaces 21S of the slot 21. It can be noted that the insulator 8 could be formed integrally with the coil 9.

[0025] Fig. Figure 6 shows a perspective view showing a state in which a wedge insertion machine 10 for the rotor 100 (hereinafter referred to simply as "the wedge insertion machine 10") is attached to the opening of the slot 21.

[0026] Fig. Figure 7 shows a cross-sectional view along a line BB in Fig. 6 dar.

[0027] Fig. Figure 8 shows a perspective view of a reaction force-absorbing wedge 52.

[0028] Next, the wedge insertion machine 10 will be described. The wedge insertion machine 10 is used to insert the wedge 7, which presses or pressed the coil 9, which is housed within the slot 21 of the rotor core 20, in the direction of the inside in the radial direction X of the rotor 100 into a predetermined position in the slot 21.

[0029] As in the Fig. 6 and Fig. As shown in Figure 7, the wedge insertion machine 10 comprises a press device 11, a pressure sensor 13, an insertion jig 14, and a reaction force transducer 50. Each component of the wedge insertion machine 10 is arranged in the axial direction Z from an axial end on the opening of the slot 21 in the order of the reaction force transducer 50, the press device 11, the pressure sensor 13, and the insertion jig 14.

[0030] The pressing device 11 has a pressing element 11A that extends and retracts in the axial direction Z. The pressing element 11A pushes an insertion device 14, which inserts the wedge 7 into the rotor core 20 in the axial direction Z, over the pressure sensor 13. For example, a cylinder mechanism moving in the axial direction Z is used as the pressing element 11A. The pressing device 11 is arranged radially X outside the slot 21. The pressure sensor 13 is a sensor that measures the force with which the wedge 7 is inserted into the slot 21 of the rotor core 20. The insertion device 14 is an auxiliary device that transmits the pressing force of the pressing device 11 to the wedge 7. The insertion device 14 is arranged radially X outside the slot 21. The insertion device 14 has two through holes 14H that penetrate in the radial direction X.

[0031] The insertion device 14 and the wedge 7 are integrated by inserting pins P2 into the through holes 14H formed in the insertion device 14 and the wedge holes 7H formed in the wedge 7. It should be noted that the wedge holes 7H could also serve as air passages for cooling gas of the rotor 100.

[0032] The reaction force sensor 50 serves to detect the reaction force generated when the pressing device 11 presses the wedge 7 over the insertion device 14. The reaction force sensor 50 is arranged in the axial direction Z on the opposite side of the pressure part 11A of the pressing device 11.

[0033] The reaction force transducer 50 comprises a key 51, a reaction force-absorbing wedge 52, and a reaction force-absorbing (auxiliary) device 53. The reaction force-absorbing device 53 is a component that directly absorbs the reaction force of the compressive force when the wedge 7 is inserted into the slot 21 on the outside in the radial direction X of the insulator 8, and is arranged outside the slot 21 in the radial direction X.

[0034] An axial surface on the inside in the axial direction Z of the reaction force-receiving device 53 is arranged such that it abuts an axial surface on the opposite side of the pressure part 11A in the axial direction Z, and the reaction force-receiving device 53 is arranged outside the slot 21 in the radial direction X to receive the reaction force directly from the pressing device 11.

[0035] The reaction force-absorbing wedge 52 is a component integrated into the reaction force-absorbing device 53 and absorbs the reaction force from the pressing device 11. The reaction force-absorbing wedge 52 comprises a reaction force-absorbing wedge projection 52T, which projects in the circumferential direction Y and extends in the axial direction Z. Similar to the wedge 7, the reaction force-absorbing wedge 52 is inserted into the slot 21 from the axial direction Z, such that the reaction force-absorbing wedge projection 52T follows along the slot groove section 21M.

[0036] The shape of the axial end surfaces of the reaction force-absorbing wedge 52 in the axial direction Z is the same as that of the wedge 7, and the external appearance is also the same as that of the wedge 7. However, the reaction force-absorbing wedge 52 includes a keyway 52M (second keyway) formed on an outer surface in the radial direction X, extending in the circumferential direction Y and recessed towards the inside in the radial direction X.

[0037] The reaction force-absorbing device 53 and the reaction force-absorbing wedge 52 are integrated by inserting pins P1 into through holes 53H formed in the radial direction X of the reaction force-absorbing device 53 and into holes 52H formed in the radial direction X of the reaction force-absorbing wedge 52. As shown in Fig. Figure 7 shows that if there is a gap between the reaction force-absorbing wedge 52 and the coil 9 on the inside in the radial direction X, the pins P1 could be bolts or they could be designed to prevent slippage towards the inside in the radial direction X. Since the reaction force-absorbing device 53 and the reaction force-absorbing wedge 52 are integrated as described above, the reaction force is transferred from the pressing device 11 to the reaction force-absorbing wedge 52.

[0038] The key 51 is inserted transversely in the circumferential direction Y into key grooves 20M (first key grooves) formed on the outer circumferential surface near the axial end of the rotor core 20, and into the key groove 52M of the reaction force-absorbing wedge 52 described above, both being recessed in the radial direction X. The reaction force-absorbing wedge 52 is secured to the opening of the slot 21 in such a way that it does not move in the axial direction Z by means of the key 51. It should be noted that the key grooves 20M could utilize the groove for a retaining ring 25 of the rotor 100, as shown in Fig. 1 shown.

[0039] As described above, the reaction force-receiving device 53 transmits the reaction force to the reaction force-receiving wedge 52, which is integrated therein, and the reaction force is absorbed by the rotor core 20 via the key 51.

[0040] Next, the insertion operation of wedge 7 will be described with reference to the Fig. 9, Fig. 10, Fig. 11, Fig. 12 to Fig. 13 will be described.

[0041] Fig. Figure 9 presents a flowchart showing the steps of the wedge insertion procedure for a rotor of a rotating electric machine.

[0042] Fig. Figure 10 shows a cross-sectional view showing a state where the coil 9 is inserted into the slot 21 of the rotor core 20.

[0043] Fig. Figure 11 shows a cross-sectional view showing a state where the insulator 8 is arranged and the wedge 7 is temporarily inserted into the slot 21 of the rotor core 20.

[0044] Fig. Figure 12 shows a cross-sectional view showing a state where the insertion device 14 is attached to the temporarily inserted wedge 7 and the wedge insertion machine 10 is attached to the rotor core 20.

[0045] Fig. Figure 13 shows a cross-sectional view that depicts a state where the wedge 7 has been inserted into a predetermined position.

[0046] First, the wedge insertion machine 10 is prepared (step S11).

[0047] Next, the insulator 8, which has a predetermined radial thickness, is positioned in a predetermined location within the slot 21 into which the coil 9 has been inserted (step S12). Then, the wedge 7 is inserted from an axial end section of the slot 21 of the rotor core 20 such that the wedge projections 7T, which extend on both sides in the circumferential direction Y, are aligned along the slot groove sections 21M. At this time, the wedge 7 is manually pressed in until it is inserted far enough to seat on the insulator 8 (step S13).

[0048] Next, as in Fig. As shown in Figure 12, the insertion device 14 is placed on the wedge 7 and the pins P2 are inserted, while the through holes 14H of the insertion device 14 are aligned with the wedge holes 7H of the wedge 7. Then the pressure sensor 13 is positioned so that it is in contact with the insertion device 14. Next, the reaction force-absorbing wedge 52 is inserted into the slot 21 from the axial direction Z in the same manner as the wedge 7, and the reaction force-absorbing device 53 is positioned at a predetermined location. Then the pins P1 are inserted, while the through holes 53H of the reaction force-absorbing device 53 and the holes 52H of the reaction force-absorbing wedge 52 are aligned.

[0049] The key 51 is then inserted into the key slots 20M formed in the rotor core 20 and into the key slot 52M of the reaction force-absorbing wedge 52, thereby fixing the position of the reaction force-absorbing wedge 52 in the axial direction Z and the reaction force-absorbing device 53. Finally, the press device 11, which includes the pressure part 11A, is positioned at the opening of the slot 21, and a tube for supplying a working fluid is connected to the connection port 11IN of the press device 11 (step S14). It should be noted that oil is preferably used as the working fluid.

[0050] After step S14, the working fluid is fed into the pressure part 11A. The pressure part 11A moves towards the pressure sensor 13 due to the working fluid within the pressing device 11 and the pressure part 11A. Once the pressure part 11A comes into contact with the pressure sensor 13, the force exerted by the pressure of the working fluid acts via the pressure sensor 13 and the insertion device 14 on the wedge 7 to move the wedge 7 into a predetermined position in the axial direction Z, pressing it and fitting it into the slot 21.

[0051] Next, the pressing device 11 is driven to press and insert the wedge 7 in the axial direction Z into a predetermined position (step S15). During this process, it is verified whether the pressing force of the wedge 7, measured by the pressure sensor 13, is within a predetermined range. If the measured value is within the range after the insertion is complete (step S16 - YES), the working fluid is released through the connecting port 11IN, and the axial length of the pressing part 11A in the axial direction Z is restored to its original length.

[0052] The wedge insertion machine 10 is then removed. By repeating this procedure, a predetermined number of wedges 7 are inserted into the respective slots 21, and the wedge insertion process is completed.

[0053] If the measured value of the insertion force of the wedge 7 is not within the predetermined range (step S16 - NO), the working fluid is vented through the connecting port 11IN, and the length of the pressure part 11A in the axial direction Z is restored to its original length. Then, the temporarily inserted wedge 7 and the attached insulator 8 are removed, and the insulator 8 is replaced with another whose radial thickness is adjusted so that the insertion force of the wedge 7 falls within the predetermined range. The same procedure is then carried out from step S12 onward. Once all wedges 7 have been inserted and fitted into the slots 21, the wedge insertion machine 10 is removed to complete the process (step S17).

[0054] Since the movable range of the pressure part 11A is limited in the axial direction Z when the position of the wedge 7 to be inserted and the position of the reaction force receiving device 53, which is determined by the key slots 20M formed in the rotor core 20, are far apart, the applicable insertion range of the wedge 7 can be adjusted by inserting a spacer 15 between the pressure part 11A and the pressure sensor 13.

[0055] Alternatively, the spacer 15 could be inserted between the pressure sensor 13 and the insertion device 14, or between the pressing device 11 and the reaction force-receiving device 53.

[0056] According to the wedge insertion machine 10 for a rotor and the wedge insertion method for a rotor of embodiment 1, The wedge insertion machine for a rotor is the wedge insertion machine for a rotor that inserts a wedge which presses a coil, which is housed within a slot of a rotor core, towards an inside in a radial direction of the rotor, wherein the slot has slot groove sections, each of which is recessed in a circumferential direction and extends in an axial direction, on both side surfaces in the circumferential direction, which are located outside the coil in the radial direction, the wedge has wedge projections that are inserted into the slot groove sections and that project in the circumferential direction and extend in the axial direction, The wedge insertion machine is equipped with: a pressing device which is arranged outside the slot in the radial direction and which has a pressure part which is movable in an axial direction of the rotor, an insertion device arranged outside the slot in the radial direction, which moves in the axial direction through the pressing device, which presses the wedge in the axial direction and fits the wedge into the slot, a pressure sensor that measures a pressure force with which the pressure part pushes the wedge in the axial direction over the insertion device, and a reaction force transducer that detects a reaction force with which the pressing device presses the wedge over the insertion device, so that a wedge insertion machine and a wedge insertion procedure can be provided for a rotor that have a large wedge insertion force and reduce working time. Furthermore, since the wedge insertion machine 10 can be installed directly at an opening of the rotor slot, the installation space for the equipment can be reduced.

[0057] Furthermore, since the required wedge insertion force can be generated and the magnitude of the insertion force can be accurately measured by the pressure sensor 13, product quality can be maintained consistently.

[0058] Furthermore, since the reaction force can be absorbed by the rotor core 20 during the insertion of the wedge 7, the insertion force of the wedge 7 can be measured and managed within a predetermined range.

[0059] Therefore, even in cases where a large wedge insertion force, exceeding, for example, 1 ton, is required, the system can accommodate it, and the insertion force can be managed within a predetermined range when the wedge is pressed and inserted. Furthermore, the frequency of repositioning the wedge insertion machine can be reduced, even when a wedge is inserted over a long distance, exceeding, for example, 300 mm, thus shortening the operating time.

[0060] The wedge insertion machine for a rotor is also designed such that: the rotor core has first keyways provided on an outer circumferential surface at an axial end, extending in the circumferential direction and recessed in the radial direction; the reaction force sensor is arranged on one side in the axial direction opposite to the side where the pressure part of the pressing device is located; the reaction force sensor exhibits: a reaction force-absorbing device that pushes the wedge in the axial direction and absorbs a reaction force of a pressure force when the wedge is fitted into the slot; a reaction force-absorbing wedge arranged in the slot coupled to the reaction force-absorbing device, having a second keyway formed on the outer surface in the radial direction, extending circumferentially and recessed radially inwards, and having a reaction force-absorbing wedge projection inserted into the slot groove section, projecting circumferentially and extending axially; and a rod-shaped key that is inserted circumferentially through the first key grooves and the second key groove; which allows a reaction force with which the wedge 7 is pressed to be reliably absorbed by the rotor core and a pressure force to be accurately measured by the pressure sensor 13.

[0061] The wedge insertion machine for a rotor is also designed such that: the insertion device is arranged outside the slot in the radial direction, the wedge has a wedge hole that is provided in the radial direction, the insertion device has a through hole that runs in the radial direction, and the insertion device and the wedge are integrated by inserting a pin through the through hole of the insertion device and through the wedge hole of the wedge, so that the wedge 7 can be coupled to the wedge insertion machine after the wedge 7 has been moved into an insertion position beforehand, and the productivity of the wedge insertion process can be improved.

[0062] The wedge insertion method for a rotor is also a wedge insertion method for a rotor that uses the wedge insertion machine for a rotor. the procedure exhibits: a step of temporarily inserting the wedge into the slot, one step of positioning the wedge insertion machine at an opening of the slot, and a step of pressing the insertion device in the axial direction, while a pressure force of the pressing part is measured by the pressure sensor, so that the wedge 7 can be positioned at the opening of the slot after the wedge 7 has been temporarily inserted, and machinability can be improved.

[0063] The wedge insertion method for a rotor also includes a step of determining the thickness or strength of an insulator in the radial direction, which is arranged radially outside the coil. based on a measured value from the pressure sensor, so that, even if there is a deviation in the manufacture of the wedge 7, a suitable insertion force can be applied to each wedge 7.

[0064] The wedge insertion method for a rotor is also a wedge insertion method for a rotor that uses the wedge insertion machine for a rotor. and that simultaneously uses a large number of wedge insertion machines for rotors, so that the process of inserting the wedge 7 into the slot 21 can be carried out simultaneously and in parallel, which reduces the working time during the manufacture or maintenance of the Rotor 100. Design 2.

[0065] Below, a wedge insertion machine for a rotor and a wedge insertion method for a rotor according to embodiment 2 will be described, focusing on parts that differ from embodiment 1.

[0066] Fig. Figure 14 shows a perspective view showing a state in which a wedge insertion machine 210 for a rotor (hereinafter referred to simply as "the wedge insertion machine 210") is attached to the opening of the slot 21.

[0067] Fig. Figure 15 shows a cross-sectional view along a line CC in Fig. 14. The configuration of the wedge insertion machine 210 according to embodiment 2 differs from the wedge insertion machine 10 described in embodiment 1 with regard to the reaction force sensor 250, while the other components are the same as those in embodiment 1.

[0068] In the Fig. 14 and Fig. 15. The same reference numbers are assigned to parts that have the same characteristics as those in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12 to Fig. 13 are those described in embodiment 1, and a detailed explanation of them is omitted.

[0069] As in the Fig. 14 and Fig. As shown in Figure 15, the reaction force transducer 250 of the wedge insertion machine 210 comprises a reaction force-receiving device 253 and a reaction force-receiving wedge 252 and receives the reaction force during a wedge insertion by means of a frictional force with the slotted groove section 21M.

[0070] A through-hole 253H with a female screw is provided in the radial direction X in the reaction force-absorbing device 253, and a through-hole 252H with a female screw is also provided in the radial direction X in the reaction force-absorbing wedge 252. Both components can be fastened together by a bolt B1. When the bolt B1 is inserted and tightened through the through-hole 253H of the reaction force-absorbing device 253 and through the through-hole 252H of the reaction force-absorbing wedge 252, a tip B1S of the bolt B1 abuts a support plate 74, which is arranged on the outer circumferential surface of the coil 9 in the radial direction X. Further tightening of the bolt B1 moves the reaction force-absorbing wedge 252 outward in the radial direction X.As a result, a reaction force-absorbing wedge projection 252T of the reaction force-absorbing wedge 252 is pressed against an outer surface in the radial direction X of the slot groove section 21M, and the reaction force-absorbing wedge 252 is fixed within the slot 21 by a frictional force. The shape of the reaction force-absorbing wedge projection 252T is the same as that of the reaction force-absorbing wedge projection 52T described in embodiment 1.

[0071] As a result, the reaction force-absorbing wedge 252 can withstand a force in the axial direction Z due to the frictional force between the reaction force-absorbing wedge 252 and the rotor core 20, and the reaction force transducer 250, which consists of the reaction force-absorbing device 253 and the reaction force-absorbing wedge 252, acts as the reaction force transducer of the wedge insertion machine 210.

[0072] According to the wedge insertion machine 210 and the wedge insertion method for a rotor of embodiment 2, The reaction force sensor is arranged on the opposite side in the axial direction to the pressure part of the pressing device. the reaction force transducer includes: a reaction force-absorbing device that pushes the wedge in the axial direction and absorbs a reaction force of a compressive force when the wedge is fitted into the slot; and a reaction force-absorbing wedge arranged in the slot, coupled to the reaction force-absorbing device, and having a reaction force-absorbing wedge projection that is inserted into the slot groove section and projects circumferentially and extends in an axial direction, wherein the reaction force-absorbing device and the reaction force-absorbing wedge each have a through hole which is connected in the radial direction and has a thread, and wherein the reaction force-absorbing wedge can be fixed in the slot by bolts that are inserted through the respective through holes.

[0073] Therefore, the wedge insertion machine 210 can be used even if no keyway 20M is formed in the rotor core or even if the wedge 7 is inserted in a position away from the keyway 20M.

[0074] It can be noted that in embodiment 2, the reaction force-absorbing device 253 and the reaction force-absorbing wedge 252 could also be used in combination with the configuration described in embodiment 1, in which a key 51 is inserted into the key groove 20M. Design 3.

[0075] Below, a wedge insertion machine for a rotor and a wedge insertion method for a rotor according to embodiment 3 will be described, focusing on parts that differ from embodiment 2.

[0076] Fig. Figure 16 shows a perspective view showing a state in which a wedge insertion machine 310 for a rotor (hereinafter referred to simply as "the wedge insertion machine 310") is attached to the opening of the slot 21.

[0077] Fig. Figure 17 shows a cross-sectional view along a line DD in Fig. 16 dar.

[0078] The configuration of the wedge insertion machine 310 according to embodiment 3 differs from the wedge insertion machines 10 and 210 described in embodiments 1 and 2 with respect to the insertion device 314, while the other components are the same as those in embodiment 1 or embodiment 2. In the Fig. 16 and Fig. 17. The same reference numbers are assigned to parts that are the same as those in the Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, Fig. 9, Fig. 10, Fig. 11, Fig. 12, Fig. 13, Fig. 14 to Fig. 15 are those described in embodiments 1 and 2, and their detailed explanation is omitted.

[0079] As in Fig.As shown in Figure 17, the insertion device 314 of the wedge insertion machine 310 has a main body section arranged on the outside in the radial direction X of the slot 21 and includes a projection 314T that extends into the slot 21 in the radial direction X at a rear end section in the insertion direction (axial direction Z) of the wedge 7 and that presses the wedge 7 in the axial direction Z.

[0080] According to the wedge insertion machine 210 and the wedge insertion method for a rotor of embodiment 3, The insertion device is arranged outside the slot in the radial direction and has a projection that extends into the slot and presses the wedge. so that even a wedge 307, which is not provided with a wedge hole 7H, can be pressed through the insertion device 314 in the axial direction Z and can be inserted into the insulator 8.

[0081] Although the disclosure above is described with reference to various exemplary embodiments and implementations, it is understood that various features, aspects and functionality described in relation to one or more of the individual embodiments are not limited in their applicability to the particular embodiment in which they are described, but instead can be applied alone or in various combinations to one or more of the embodiments of the disclosure.

[0082] It is therefore understood that numerous modifications, not described here by way of example, can be devised without deviating from the scope of the present disclosure. For example, at least one of the component parts could be modified, added, or eliminated. At least one of the component parts mentioned in at least one of the preferred embodiments could be selected and combined with the component parts mentioned in another preferred embodiment. DESCRIPTION OF REFERENCE MARKS 100 Rotor 10, 210, 310 Wedge insertion machine 11 Pressing device 11A Printing part 11IN connection 13 Pressure sensor 14, 314 Insertion device 15 spacers 14H, 53H, 252H, 253H Through hole 314T advantage 20 rotor core 20M, 52M keyway 21 slots 21M slotted groove section 21S side surface 22 External perimeter area 25 retaining ring 50, 250 reaction force transducers 51 keys 52, 252 Reaction force-absorbing wedge 52H Hole 53, 253 Reaction force-absorbing device 7,307 wedge 7H Wedge Hole 8 Insulator 9 coil 7T wedge projection 52T, 252T reaction force-absorbing wedge projection B1 bolt B1S Top 74 Support plate X radial direction Y circumferential direction Z axial direction QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] JP 4-229038

[0005]

Claims

[1] Wedge insertion machine for a rotor, which inserts a wedge which presses a coil, which is housed within a slot of a rotor core, towards an inside in a radial direction of the rotor, wherein the slot has slot groove sections, each of which is recessed in a circumferential direction and extends in an axial direction, on both side surfaces in the circumferential direction, which are located outside the coil in the radial direction, the wedge has wedge projections that are inserted into the slot groove sections and protrude in the circumferential direction and extend in the axial direction, The wedge insertion machine is equipped with: a pressing device which is arranged outside the slot in the radial direction and which has a pressure part which is movable in an axial direction of the rotor, an insertion device arranged outside the slot in the radial direction, which moves in the axial direction through the pressing device, which presses the wedge in the axial direction and fits the wedge into the slot, a pressure sensor that measures the pressure force with which the pressure part pushes the wedge in the axial direction over the insertion device, and a reaction force transducer that detects a reaction force with which the pressing device presses the wedge over the insertion device. [2] Wedge insertion machine for a rotor according to claim 1, wherein the rotor core has first keyways provided on an outer circumferential surface at an axial end, which extend in the circumferential direction and are recessed in the radial direction, the reaction force sensor is arranged on one side opposite in the axial direction to the side where the pressure part of the pressing device is located, the reaction force sensor exhibits: a reaction force-absorbing device that pushes the wedge in the axial direction and absorbs a reaction force of a pressure force when the wedge is fitted into the slot; a reaction force-absorbing wedge arranged in the slot coupled to the reaction force-absorbing device, having a second keyway formed on an outer surface in the radial direction, extending circumferentially and recessed in the radial direction towards an inner surface, and having a reaction force-absorbing wedge projection inserted into the slot groove section, projecting circumferentially and extending axially; and a rod-shaped key that is inserted circumferentially into the first grooves and the second key groove. [3] Wedge insertion machine for a rotor according to claim 1, wherein the reaction force sensor is arranged on the opposite side in the axial direction to the pressure part of the pressing device, The reaction force sensor includes: a reaction force-absorbing device that pushes the wedge in the axial direction and absorbs a reaction force of a compressive force when the wedge is fitted; and a reaction force-absorbing wedge arranged in the slot, coupled to the reaction force-absorbing device, and having a reaction force-absorbing wedge projection inserted into the slot groove section, projecting in the circumferential direction and extending in an axial direction, wherein the reaction force-absorbing device and the reaction force-absorbing wedge each have a through hole which is connected in the radial direction and has a thread, and wherein the reaction force-absorbing wedge can be fixed in the slot by bolts that are inserted through the respective through holes. [4] Wedge insertion machine for a rotor according to one of claims 1 to 3, wherein the insertion device is arranged outside the slot in the radial direction, the wedge has a wedge hole that is provided in the radial direction, the insertion device has a through hole that penetrates in the radial direction, and The insertion device and the wedge are integrated by inserting a pin through the through-hole of the insertion device and through the wedge hole of the wedge. [5] Wedge insertion machine for a rotor according to one of claims 1 to 3, wherein the insertion device is arranged outside the slot in the radial direction and has a projection that extends into the slot and presses the insertion device. [6] Wedge insertion method for a rotor using the wedge insertion machine for a rotor according to any one of claims 1 to 5, wherein the method comprises: a step of temporarily inserting the wedge into the slot, one step of positioning the wedge insertion machine at an opening of the slot, and a step of pressing the insertion device in the axial direction, while a pressure force of the pressure part is measured by the pressure sensor. [7] Wedge insertion method for a rotor according to claim 6, wherein the method includes a step of determining the thickness of an insulator in the radial direction, which is arranged outside the coil in the radial direction, based on a measured value from the pressure sensor. [8] Wedge insertion method for a rotor according to claim 6 or 7, wherein the method simultaneously uses a plurality of wedge insertion machines for rotors according to any one of claims 1 to 5.

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