WO2020250431A1 - 回転電機のウェッジ緩み検査装置、回転電機のウェッジ緩み検査システム、および、回転電機のウェッジ緩み検査方法 - Google Patents
回転電機のウェッジ緩み検査装置、回転電機のウェッジ緩み検査システム、および、回転電機のウェッジ緩み検査方法 Download PDFInfo
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- WO2020250431A1 WO2020250431A1 PCT/JP2019/023703 JP2019023703W WO2020250431A1 WO 2020250431 A1 WO2020250431 A1 WO 2020250431A1 JP 2019023703 W JP2019023703 W JP 2019023703W WO 2020250431 A1 WO2020250431 A1 WO 2020250431A1
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- Prior art keywords
- wedge
- electric machine
- rotary electric
- axial direction
- inspection
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- 238000000034 method Methods 0.000 title claims description 15
- 238000007689 inspection Methods 0.000 claims abstract description 74
- 230000002093 peripheral effect Effects 0.000 claims abstract description 10
- 238000009527 percussion Methods 0.000 claims description 11
- 239000004020 conductor Substances 0.000 claims description 8
- 238000011156 evaluation Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract 1
- 238000010168 coupling process Methods 0.000 abstract 1
- 238000005859 coupling reaction Methods 0.000 abstract 1
- 230000004323 axial length Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/225—Supports, positioning or alignment in moving situation
- G01N29/226—Handheld or portable devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2693—Rotor or turbine parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/269—Various geometry objects
- G01N2291/2697—Wafer or (micro)electronic parts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/045—Analysing solids by imparting shocks to the workpiece and detecting the vibrations or the acoustic waves caused by the shocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
- G01N29/265—Arrangements for orientation or scanning by relative movement of the head and the sensor by moving the sensor relative to a stationary material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/44—Processing the detected response signal, e.g. electronic circuits specially adapted therefor
- G01N29/46—Processing the detected response signal, e.g. electronic circuits specially adapted therefor by spectral analysis, e.g. Fourier analysis or wavelet analysis
Definitions
- the present application relates to a wedge loosening inspection device for a rotating electric machine, a wedge loosening inspection system for a rotating electric machine, and a wedge loosening inspection method for a rotating electric machine.
- the rotor is composed of a rotor and a stator, and the change in the magnetic field generated by the rotation of the rotor is converted into electrical energy by the stator.
- the stator has a structure in which a coil is inserted into a slot of a core in which silicon steel plates are laminated, and the coil is pressure-fixed by an insulating member.
- the coil is fixed by stacking a wavy ripple spring and a wedge which is a plate-like member on the radial outer side of the coil and pressing the ripple spring with the wedge while compressing the ripple spring.
- the state of the wedge of the rotary electric machine is sensual when the inspector hits the wedge with a hammer while the rotor is pulled out, and the wedge is tightened and loosened by the sound and vibration generated at that time. Judging to.
- the wedge at the end in the axial direction is located at the so-called "step drop portion" of the stator core.
- the shape of the stator core of the portion is a step-like shape in which the inner diameter gradually increases outward in a step-like manner toward the outside in the axial direction.
- the present application discloses a technique for solving the above-mentioned problems, and the axial length of the end wedge, which differs depending on the model of the rotary electric machine, or the relative relationship between the end wedge and the stepped portion. It is an object of the present invention to provide a wedge loosening inspection device for a rotating electric machine, a wedge loosening inspection system for a rotating electric machine, and a wedge loosening inspection method for a rotating electric machine, which can be applied to various rotary electric machines regardless of the difference in positional relationship.
- the wedge loosening inspection device for rotary electric machines disclosed in the present application is At the axial end of the stator core, a stepped portion in which the inner diameter of the stator core gradually increases toward the outside in the axial direction is defined as a step-down portion.
- a wedge loosening inspection device for a rotary electric machine that inspects the looseness of a wedge that presses and fixes the inner peripheral surface of a conductor inserted into the slot of the step drop portion radially outward.
- An inspection unit having a wedge striking device having a percussion hammer for striking the wedge, and a wedge vibration detecting device for detecting the vibration of the wedge due to striking.
- the suction portion is provided with a suction part that is connected to the inspection part via a connecting member and is attracted to the inner peripheral surface of the step-down part.
- the suction portion is provided with a first attachment that can adjust the attachment position of the suction portion in the axial direction inside the suction portion in the axial direction.
- the wedge loosening inspection chair system of the rotary electric machine disclosed in the present application
- the wedge looseness inspection device It has a frequency analysis unit that analyzes the frequency characteristics of the vibration waveform of the wedge that has been hit, and an evaluation unit that compares and evaluates the frequency characteristics of the analysis result of the vibration waveform with a preset judgment standard and quantifies the judgment result. It is a thing.
- the wedge loosening inspection method of the rotary electric machine disclosed in the present application is described.
- the wedge loosening inspection device of the rotary electric machine disclosed in the present application, It can be applied to various rotary electric machines regardless of the length of the end wedge in the axial direction Z, which is different for each model of the rotary electric machine, or the difference in the relative positional relationship between the end wedge and the stepped portion.
- the wedge loosening inspection system of the rotary electric machine disclosed in the present application It can be applied to various rotary electric machines regardless of the length of the end wedge in the axial direction Z, which is different for each model of the rotary electric machine, or the difference in the relative positional relationship between the end wedge and the stepped portion.
- the wedge loosening inspection method of the rotary electric machine disclosed in the present application Since the wedge that fixes the coil of the stator can be inspected without pulling out the rotor, the inspection work can be completed in a short period of time.
- FIG. 5 is a perspective view showing the inside of an axial end portion of a stator of a rotary electric machine to be inspected according to the first embodiment.
- FIG. 5 is a front schematic view showing a state in which the wedge loosening inspection device of the rotary electric machine according to the first embodiment is inserted into the stepped-down portion of the stator core of the rotary electric machine from the outside in the axial direction.
- FIG. 5 is a perspective view showing the inside of an axial end portion of a stator of a rotary electric machine to be inspected according to the first embodiment.
- FIG. 5 is a front schematic view showing a state in which the wedge loosening inspection device of the rotary electric machine according to the first embodiment is inserted into the stepped-down portion of the stator core of the rotary electric machine from the outside in the axial direction.
- FIG. 5 is a side view of the wedge loosening inspection device of the rotary electric machine according to the first embodiment as viewed from the circumferential direction, in which the wedge loosening inspection device of the rotary electric machine is inserted and fixed from the outside in the axial direction to the stepped portion of the stator core.
- FIG. 1 It is a perspective view which shows the structure of the suction part of the end wedge loosening measuring apparatus according to Embodiment 1.
- FIG. It is a figure which shows the variation of the edge wedge to be inspected. It is a figure which shows the variation of the edge wedge to be inspected. It is a figure which shows the variation of the edge wedge to be inspected. It is a figure which shows the variation of the edge wedge to be inspected.
- FIG. 1 is a perspective view of a wedge loosening inspection device 100 (hereinafter, simply referred to as a device 100) of a rotary electric machine.
- FIG. 2 is a perspective view showing the inside of the end portion of the stator 10 of the rotary electric machine to be inspected in the axial direction Z. As shown in FIG.
- the conductor 3 constituting the coil of the stator 10 has a radius on the inner peripheral surface of each conductor 3 by a wedge 1 and a ripple spring (not shown) inserted between the wedge 1 and the conductor 3. It is fixed by pressing it to the outside of the direction A.
- a plurality of wedges 1 are inserted in order to fix one conductor 3 inserted in one slot.
- the wedges 1 inserted at both ends in the axial direction Z are referred to as end wedges 1t.
- the end wedge 1t is arranged so as to sandwich both ends in the circumferential direction B at the stepped-down portion 11t of the stator core 11.
- the step drop portion 11t has a stepped shape in which the inner diameter of the stator core 11 gradually increases toward the outside of the axial direction Z at the end of the stator core 11 in the axial direction Z. It is a part.
- the apparatus 100 is juxtaposed in the circumferential direction B of the rotary electric machine, and the first suction portion 4a and the second suction portion are adsorbed on the inner peripheral surface of the stepped-down portion 11t of the stator core 11 of the rotary electric machine.
- the inspection unit 60 which is arranged between the 4b and the first suction unit 4a and the second suction unit 4b and is equipped with a device for measuring the looseness of the end wedge 1t, and the first suction unit 4a and the inspection unit 60.
- a first connecting member 5a for connecting the above and a second connecting member 5b for connecting the second suction unit 4b and the inspection unit 60 are provided.
- the inspection unit 60 has a structure in which a handle 9 for manual operation can be attached by a screwing structure, and the handle 9 serves as a handle when the device 100 is moved and when the stator core 11 is attached to the stepped-down portion 11t.
- the inspection unit 60 includes a percussion hammer 61, and strikes the central position of the end wedge 1t in the axial direction Z.
- the consultation hammer 61 of the inspection unit 60 shows a protruding state.
- FIG. 3 is a front schematic view showing a state in which the device 100 is inserted into the stepped-down portion 11t of the stator core 11 of the rotary electric machine from the outside in the axial direction Z.
- FIG. 4 is a side view of the device 100 inserted into the stepped-down portion 11t of the stator core 11 from the outside in the axial direction Z as viewed from the circumferential direction B.
- the device 100 In the inspection using the device 100, in order to inspect the looseness of the end wedge 1t without pulling out the rotor 20 of the rotary electric machine, the device 100 is placed between the stepped-down portion 11t of the stator core 11 and the rotor 20. It is inserted from the outside in the axial direction Z.
- FIG. 5 is a perspective view showing the configuration of the first suction portion 4a and the first connecting member 5a of the device 100.
- the second suction portion 4b and the second connecting member 5b are symmetrical products with the first suction portion 4a and the first connecting member 5a, and each has the same configuration and function.
- the suction surface 41a (upper surface in FIG. 5) that slides on the outer peripheral surface of the stator core 11 is made of a material having a low friction coefficient.
- the handle 9 can be gripped and manually operated without providing a traveling mechanism such as a motor, a pulley, a gear, etc. for moving the suction surface 41a and a control mechanism associated therewith.
- a traveling mechanism such as a motor, a pulley, a gear, etc.
- the operation enables smooth movement in the axial direction Z.
- the permanent magnet P may be replaced with an electromagnet. In that case, by turning the power of the electromagnet on and off in a timely manner, the first suction portion 4a carelessly attracts to the stepped-down portion 11t of the stator core 11. This can be prevented and the device 100 can be easily attached to the stator 10.
- the first suction portion 4a is an attachment 42a (first) whose axial direction Z position can be adjusted in order to adjust the suction position in the axial direction Z with respect to the step-down portion 11t described above within a predetermined length range.
- An attachment is provided at the inner end in the axial direction Z.
- the attachment 42a is attached to the first suction portion 4a by the adjusting member 43a, and the adjusting member 43a can be rotated to finely adjust the attachment position in the axial direction Z. Furthermore, it can be replaced with an attachment 42a having different dimensions.
- the first suction portion 4a is connected to the first connecting member 5a by the fastening member 44a.
- the position of the inspection unit 60 in the radial direction A can be adjusted between the first suction unit 4a and the first connecting member 5a in order to adjust the position of the inspection unit 60 in the radial direction A within a predetermined length range.
- the attachment 45a (second attachment) can be inserted and replaced.
- first connecting member 5a a plurality of mounting holes 5ah1, 5ah2, and 5ah3 for inserting the fastening member 44a are arranged side by side in the axial direction Z, and the connecting position of the first suction portion 4a can be changed to the axial direction Z. And.
- the first connecting member 5a is connected to the inspection unit 60 by the fastening member 51a.
- the device 100 includes a percussion hammer 61 and strikes the central position of the end wedge 1t in the axial direction Z.
- the inner diameter of the stator core 11 is the central position in the axial direction Z of the portion where the inner diameter of the stator core 11 increases toward the outside in the axial direction Z in four steps.
- FIGS. 6 to 8 show variations of the end wedge 1t to be inspected by the device 100.
- a method of attaching the first suction portion 4a to the stepped-down portion 11t of the stator core 11 will be described with reference to FIGS. 6 to 8. Since the method of attaching the second suction portion 4b to the step-down portion 11t of the stator core 11 is the same as that of the first suction portion 4a, the description thereof will be omitted, but the attachment of the second suction portion 4b is the first. It proceeds at the same time as the attachment of the suction portion 4a.
- FIGS. 6 and 7 compare the cases where the positions of the end wedges 1t in the axial direction Z are different, and FIG. 8 shows the positions of the end wedges 1t in the radial direction A from FIG. Indicates a modified stator.
- the central position in the axial direction Z of the end wedge 1t (the position to be consulted by the consultation hammer 61) is the central position in the axial direction Z of the third stage d3 of the step drop portion 11t. Therefore, the first suction portion 4a uses two mounting holes 5ah1 and 5ah2 on the outer side in the axial direction Z among the three mounting holes so as not to interfere with the fourth step d4 of the step drop portion 11t. It is attached to the connecting member 5a.
- the first suction portion 4a is positioned by pressing the inner end surface of the attachment 42a for adjusting the position in the axial direction Z against the outer end surface of the fourth stage d4 of the step drop portion 11t in the axial direction Z. To. Thereby, the position where the end wedge 1t is hit by the consultation hammer 61 can also be positioned.
- the central position of the end wedge 1t in the axial direction Z is between the third step d3 and the fourth step d4 of the step drop portion 11t, and is assumed to be the same as the state of FIG. If it is attempted to be attached to the third stage of the drop portion 11t, the first suction portion 4a interferes with the fifth stage d5 of the step drop portion 11t. Therefore, the first suction portion 4a is attached to the first connecting member 5a by using two mounting holes 5ah2 and 5ah3 inside in the axial direction Z.
- the first suction portion 4a is positioned by pressing the inner end surface of the attachment 42a for adjusting the position in the axial direction Z against the outer end surface of the fifth stage d5 of the step drop portion 11t in the axial direction Z. To. Thereby, the position where the end wedge 1t is hit by the consultation hammer 61 can also be positioned.
- the axial length of the attachment 42a for adjusting the position in the axial direction Z is slightly longer than that in FIG.
- attaching the first suction portion 4a to the first connecting member 5a using the two mounting holes 5ah2 and 5ah3 inside in the axial direction Z increases the contact area between the permanent magnet P and the step-down portion 11t. It is also to secure the adsorption power.
- the first A mounting hole to be used among a plurality of mounting holes 5ah1 to 5ah3 provided in the connecting member 5a in the axial direction Z, and the types of the attachment 42a and the attachment 45a are determined.
- FIG. 9 is a block diagram showing a configuration of a looseness determination system for end wedges of a rotary electric machine.
- the wedge looseness inspection device 100 of the rotary electric machine includes an inspection unit 60 and a wedge looseness analysis determination unit 50.
- the inspection unit 60 includes a wedge striking device 62 having a percussion hammer 61 for striking the end wedge 1t, and a wedge vibration detecting device 63 for detecting the vibration of the end wedge 1t due to the striking.
- the wedge loosening analysis determination unit 50 integrates the frequency analysis unit 51 that analyzes the frequency characteristics of the vibration waveform of the hit end wedge 1t and each frequency characteristic of the vibration waveform analysis result, and then sets a preset determination criterion. It includes an evaluation unit 52 that performs comparative evaluation and quantifies the determination result.
- the inspection unit 60 hits the end wedge 1t with the consultation hammer 61, and sends the wedge vibration information detected by the wedge vibration detection device 63 to the wedge loosening analysis determination unit 50.
- the wedge vibration information is a wedge vibration waveform measured by the wedge vibration detection device 63.
- the frequency analysis unit 51 receives the wedge vibration information, analyzes the frequency component of the wedge vibration waveform, and obtains the frequency characteristic of the wedge vibration.
- the evaluation unit 52 compares and evaluates the preset determination criteria and the frequency of the peak that appears from the frequency characteristics of the wedge vibration obtained by the frequency analysis unit 51 of the vibration waveform, and determines whether or not the end wedge 1t is loose. judge.
- the device for detecting and measuring the vibration of the end wedge 1t may be a contact-type vibration sensor, an acceleration sensor, or the like, as long as it can detect the vibration, and may be a non-contact sound collecting microphone, a displacement sensor, or the like.
- the wedge loosening inspection device for the rotary electric machine is At the axial end of the stator core, a stepped portion in which the inner diameter of the stator core gradually increases toward the outside in the axial direction is defined as a step-down portion.
- a wedge loosening inspection device for a rotary electric machine that inspects the looseness of a wedge that presses and fixes the inner peripheral surface of a conductor inserted into the slot of the step drop portion radially outward.
- An inspection unit having a wedge striking device having a percussion hammer for striking the wedge, and a wedge vibration detecting device for detecting the vibration of the wedge due to striking.
- the suction portion includes a first attachment inside the suction portion in which the attachment position of the suction portion in the axial direction can be adjusted. Therefore, since the position in the axial direction can be adjusted and the first attachment can be replaced with one having a different thickness, the length of the end wedge in the axial direction Z, which differs depending on the model of the rotary electric machine, or the length of the end wedge and the step. It can be applied to various rotary electric machines regardless of the difference in the relative positional relationship with the drop portion.
- the traveling mechanism such as the motor, pulley, and gear required for movement and the control mechanism attached to the traveling mechanism are not required, and the sensors such as the visual confirmation camera and the range finder required for determining the striking position are not required. It is possible to keep the number of parts small, and it is possible to provide a wedge loosening inspection device with high accuracy at low cost.
- the wedge loosening inspection device for the rotary electric machine is Further, a second attachment capable of adjusting the radial position of the inspection unit is provided between the suction unit and the connecting member. Therefore, the first suction unit and the second suction unit can adjust the position of the inspection unit in the radial direction A within a range of a predetermined length. It can be applied to various models of rotary electric machines by replacing attachments having different thicknesses according to the step width in the radial direction of the step drop portion to which the first suction portion and the second suction portion are sucked.
- the connecting member of the wedge loosening inspection device of the rotary electric machine includes a plurality of mounting holes arranged in the axial direction so that the connection position of the suction portion can be changed in the axial direction. Therefore, the connection positions of the first suction portion and the second suction portion can be changed in the axial direction Z by selecting the mounting holes, and the first suction portion and the second suction portion can be prevented from interfering with the step.
- the wedge loosening inspection system for the rotary electric machine is With any of the above rotary electric wedge loosening inspection devices, A frequency analysis unit that analyzes the frequency characteristics of the vibration waveform of the wedge that has been hit, and an evaluation unit that compares and evaluates the frequency characteristics of the analysis result of the vibration waveform with a preset judgment standard and quantifies the judgment result. Have. Therefore, the state of each end wedge, which differs depending on the model of the rotary electric machine, can be appropriately determined.
- the method for inspecting the wedge looseness of the rotary electric machine is as follows.
- a method for inspecting a wedge of a rotating electric machine using any of the above-mentioned wedge loosening inspection devices of a rotating electric machine Without pulling out the rotor from the rotary electric machine, the wedge loosening inspection device of the rotary electric machine is inserted between the stepped portion of the rotary electric machine and the rotor from the outside in the axial direction.
- the axially inner end surface of the first attachment is pressed against the axially outer end surface of the stepped portion, and the position where the wedge is hit by the percussion hammer is positioned. Therefore, the looseness of the wedge that fixes the coil of the stator can be inspected without pulling out the rotor, so that the inspection work can be completed in a short period of time.
- 100 Wedge loosening inspection device 1 wedge, 1t end wedge, 10 stator, 11 stator core, 11t step drop part, 20 rotor, 3 conductor, 4a first suction part, 4b second suction part, 41a suction surface , 42a attachment, 43a adjustment member, 44a fastening member, 45a attachment, 5a first connecting member, 5b second connecting member, 5ah1,5ah2,5ah3 mounting hole, 50 wedge loosening analysis judgment unit, 51 frequency analysis unit, 52 evaluation unit. , 51a fastening member, 60 inspection part, 61 consultation hammer, 62 wedge striking device, 63 wedge vibration detection device, 9 handle, A radial direction, B circumferential direction, Z axis direction, P permanent magnet.
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Abstract
Description
固定子鉄心の軸方向の端部において、前記固定子鉄心の内径が、軸方向の外側に向かって段階的に大きくなる、階段状の形状をしている部分を段落ち部と定義するとき、
前記段落ち部のスロットに挿入された導体の内周面を、径方向外側に押圧して固定するウェッジの緩みを検査する回転電機のウェッジ緩み検査装置であって、
前記ウェッジを打撃する打診ハンマを有するウェッジ打撃装置と、打撃による前記ウェッジの振動を検出するウェッジ振動検出装置とを有する検査部と、
連結部材を介して前記検査部に接続され、前記段落ち部の内周面に吸着する吸着部とを備え、
前記吸着部は、前記軸方向の内側に、前記吸着部の前記軸方向の取り付け位置を調整可能な第一アタッチメントを備えるものである。
前記ウェッジ緩み検査装置と、
打撃した前記ウェッジの振動波形の周波数特性を分析する周波数分析部と前記振動波形の分析結果の周波数特性を、予め設定された判定基準と比較評価し、判定結果を定量化する評価部とを有するものである。
前記回転電機のウェッジ緩み検査装置を用いる回転電機のウェッジ緩み検査方法であって、
前記回転電機から回転子を引き抜かずに、前記回転電機のウェッジ緩み検査装置を、前記回転電機の前記段落ち部と前記回転子との間に前記軸方向の外側から挿入し、
前記第一アタッチメントの前記軸方向の内側端面を、階段状の前記段落ち部の前記軸方向の外側端面に押し当てて、前記打診ハンマによって前記ウェッジを打撃する位置を位置決めするものである。
回転電機の機種毎に異なる端部ウェッジの軸方向Zの長さ、或いは、端部ウェッジと段落ち部との相対位置関係の相違に関係無く、様々な回転電機に適用可能である。
回転電機の機種毎に異なる端部ウェッジの軸方向Zの長さ、或いは、端部ウェッジと段落ち部との相対位置関係の相違に関係無く、様々な回転電機に適用可能である。
回転子を引き抜かずに固定子のコイルを固定するウェッジの緩みを検査できるので、短期間で点検作業を終了できる。
以下、実施の形態1による回転電機のウェッジ緩み検査装置、回転電機のウェッジ緩み検査システム、および、回転電機のウェッジ緩み検査方法を、図を用いて説明する。
図1は、回転電機のウェッジ緩み検査装置100(以下、単に装置100という)の斜視図である。
図2は、検査対象である回転電機の固定子10の軸方向Zの端部の内側を示す斜視図である。
図2に示すように、固定子10のコイルを構成する導体3は、ウェッジ1及び、ウェッジ1と導体3との間に挿入された図示しないリップルバネによって、それぞれの導体3の内周面を半径方向Aの外側に押圧して固定されている。
図4は、装置100を、固定子鉄心11の段落ち部11tに、軸方向Zの外側から挿入した状態を周方向Bから見た側面図である。
装置100を用いた検査では、回転電機の回転子20を引き抜かずに端部ウェッジ1tの緩みを検査するため、装置100は、固定子鉄心11の段落ち部11tと回転子20との間に軸方向Zの外側から挿入される。
固定子鉄心の軸方向の端部において、前記固定子鉄心の内径が、軸方向の外側に向かって段階的に大きくなる、階段状の形状をしている部分を段落ち部と定義するとき、
前記段落ち部のスロットに挿入された導体の内周面を、径方向外側に押圧して固定するウェッジの緩みを検査する回転電機のウェッジ緩み検査装置であって、
前記ウェッジを打撃する打診ハンマを有するウェッジ打撃装置と、打撃による前記ウェッジの振動を検出するウェッジ振動検出装置とを有する検査部と、
連結部材を介して前記検査部に接続され、前記段落ち部の内周面に吸着する吸着部とを備え、
前記吸着部は、前記軸方向の内側に、前記吸着部の前記軸方向の取り付け位置を調整可能な第一アタッチメントを備える。
したがって、第一アタッチメントは、軸方向の位置を調整可能かつ、厚みの異なるものに交換可能なので、回転電機の機種毎に異なる端部ウェッジの軸方向Zの長さ、或いは、端部ウェッジと段落ち部との相対位置関係の相違に関係無く、様々な回転電機に適用可能である。
更に、前記吸着部と前記連結部材との間に、前記検査部の径方向の位置を調整可能な、第二アタッチメントを備える。
したがって、第一吸着部、第二吸着部は、検査部の半径方向Aの位置を、予め定められた長さの範囲で調整できる。第一吸着部、第二吸着部が吸着する段落ち部の径方向の段差幅に合わせて、厚みの異なるアタッチメントを付け替えることで、回転電機の様々な機種に適用可能である。
したがって、取り付け穴の選択によっても第一吸着部、第二吸着部の接続位置を軸方向Zに変更可能となり、第一吸着部、第二吸着部が、段差と干渉することを防止できる。
上記いずれかの回転電機のウェッジ緩み検査装置と、
打撃した前記ウェッジの振動波形の周波数特性を分析する周波数分析部と、前記振動波形の分析結果の周波数特性を、予め設定された判定基準と比較評価し、判定結果を定量化する評価部とを有する。
したがって、回転電機の機種毎に異なる端部ウェッジのそれぞれの状態を適格に判定できる。
上記のいずれかの回転電機のウェッジ緩み検査装置を用いる回転電機のウェッジ緩み検査方法であって、
前記回転電機から回転子を引き抜かずに、前記回転電機のウェッジ緩み検査装置を、前記回転電機の前記段落ち部と前記回転子との間に前記軸方向の外側から挿入し、
前記第一アタッチメントの前記軸方向の内側端面を、階段状の前記段落ち部の前記軸方向の外側端面に押し当てて、前記打診ハンマによって前記ウェッジを打撃する位置を位置決めする。
したがって、回転子を引き抜かずに固定子のコイルを固定するウェッジの緩みを検査できるので、短期間で点検作業を終了できる。
Claims (5)
- 固定子鉄心の軸方向の端部において、前記固定子鉄心の内径が、軸方向の外側に向かって段階的に大きくなる、階段状の形状をしている部分を段落ち部と定義するとき、
前記段落ち部のスロットに挿入された導体の内周面を、径方向外側に押圧して固定するウェッジの緩みを検査する回転電機のウェッジ緩み検査装置であって、
前記ウェッジを打撃する打診ハンマを有するウェッジ打撃装置と、打撃による前記ウェッジの振動を検出するウェッジ振動検出装置とを有する検査部と、
連結部材を介して前記検査部に接続され、前記段落ち部の内周面に吸着する吸着部とを備え、
前記吸着部は、前記軸方向の内側に、前記吸着部の前記軸方向の取り付け位置を調整可能な第一アタッチメントを備える回転電機のウェッジ緩み検査装置。 - 前記吸着部と前記連結部材との間に、前記検査部の径方向の位置を調整可能な、第二アタッチメントを備える請求項1に記載の回転電機のウェッジ緩み検査装置。
- 前記連結部材は、前記吸着部の接続位置を前記軸方向に変更可能とする、軸方向に配置された複数の取り付け穴を備える請求項1又は請求項2に記載の回転電機のウェッジ緩み検査装置。
- 請求項1から請求項3のいずれか1項に記載の回転電機のウェッジ緩み検査装置と、
打撃した前記ウェッジの振動波形の周波数特性を分析する周波数分析部と、前記振動波形の分析結果の周波数特性を、予め設定された判定基準と比較評価し、判定結果を定量化する評価部とを有する回転電機のウェッジ緩み検査システム。 - 請求項1から請求項3のいずれか1項に記載の回転電機のウェッジ緩み検査装置を用いる回転電機のウェッジ緩み検査方法であって、
前記回転電機から回転子を引き抜かずに、前記回転電機のウェッジ緩み検査装置を、前記回転電機の前記段落ち部と前記回転子との間に前記軸方向の外側から挿入し、
前記第一アタッチメントの前記軸方向の内側端面を、階段状の前記段落ち部の前記軸方向の外側端面に押し当てて、前記打診ハンマによって前記ウェッジを打撃する位置を位置決めする回転電機のウェッジ緩み検査方法。
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US17/596,221 US20220326121A1 (en) | 2019-06-14 | 2019-06-14 | Device for inspecting wedge looseness of rotary electric machine, system for inspecting wedge looseness of rotary electric machine, and method for inspecting wedge looseness of rotary electric machine |
PCT/JP2019/023703 WO2020250431A1 (ja) | 2019-06-14 | 2019-06-14 | 回転電機のウェッジ緩み検査装置、回転電機のウェッジ緩み検査システム、および、回転電機のウェッジ緩み検査方法 |
CA3143001A CA3143001C (en) | 2019-06-14 | 2019-06-14 | Device for inspecting wedge looseness of rotary electric machine, system for inspecting wedge looseness of rotary electric machine, and method for inspecting wedge looseness of rotary electric machine |
EP19932915.2A EP3971565A4 (en) | 2019-06-14 | 2019-06-14 | ELECTRIC LATHE KEY LOOSENESS CHECKING DEVICE, ELECTRIC LATHE KEY LOOSENESS INSPECTION SYSTEM, AND ELECTRIC LATHE KEY LOOSENESS INSPECTION METHOD |
CN201980097056.4A CN113924484B (zh) | 2019-06-14 | 旋转电机楔块松动检查装置、旋转电机楔块松动检查系统及旋转电机楔块松动检查方法 |
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