WO2020158396A1 - Rotating electric machine and dump truck equipped therewith - Google Patents
Rotating electric machine and dump truck equipped therewith Download PDFInfo
- Publication number
- WO2020158396A1 WO2020158396A1 PCT/JP2020/001137 JP2020001137W WO2020158396A1 WO 2020158396 A1 WO2020158396 A1 WO 2020158396A1 JP 2020001137 W JP2020001137 W JP 2020001137W WO 2020158396 A1 WO2020158396 A1 WO 2020158396A1
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- WO
- WIPO (PCT)
- Prior art keywords
- broom
- rotating shaft
- electric machine
- rotating
- conductive fiber
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R39/00—Rotary current collectors, distributors or interrupters
- H01R39/02—Details for dynamo electric machines
- H01R39/56—Devices for lubricating or polishing slip-rings or commutators during operation of the collector
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/40—Structural association with grounding devices
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
Definitions
- the present invention relates to a rotating electric machine having a rotary shaft provided with measures against electrolytic corrosion, and a dump truck equipped with the same.
- the inverter when operating the inverter with a generator, if the carrier frequency of the inverter is set high, the voltage (shaft voltage) generated by high frequency induction is applied to the rotating shaft of the generator, and the bearing (bearing that supports the rotating shaft). The electric potential difference between the inner ring and the outer ring becomes large, and a phenomenon occurs in which a current flows through the bearing.
- Patent Document 1 as a countermeasure against electrolytic corrosion of a bearing of a rotating electric machine, in order to "obtain a grounding brush for a rotating electric machine having a structure that is not complicated, is easy to manufacture, and can reliably reduce the axial current," Electrolytic corrosion is suppressed by forming the conductive fibers at a plurality of locations on the annular sheet metal member and bringing them into contact with the rotating shaft.
- Patent Document 1 does not consider that the rotating electric machine is used in a dirty environment, and does not consider how to deal with mud or dust adhering to the rotating shaft of the rotating electric machine.
- Patent Document 1 stabilizes the earth effect due to the attached mud and dust. There is a problem that you cannot get it.
- an object of the present invention is to provide a rotating electric machine that can obtain a stable grounding effect even in a dirty environment.
- a rotating electric machine of the present invention includes an earth structure that comes into contact with a rotating shaft, and the earth structure includes a mounting member having a pair of fixing portions, and a rotating shaft of the rotating shaft.
- a cleaning device installed in a fixed part upstream of the direction, and a grounding device installed in a fixed part downstream of the rotation direction of the rotating shaft, wherein the cleaning device has a rectangular cross section.
- Has a broom-shaped brush installed so that its longitudinal direction substantially coincides with the axial direction of the rotating shaft, and the earthing device is installed so that the longitudinal direction of the rectangular cross section thereof substantially coincides with the axial direction of the rotating shaft.
- the cleaning device and the grounding device have a broom-shaped conductive fiber, and the region of the outer peripheral surface of the rotating shaft that the tip of the broom-shaped brush passes while contacting the rotating device when the rotating shaft rotates.
- the inside of the broom-shaped conductive fiber was installed so that the tip portion of the conductive fiber could pass through while contacting.
- FIG. 3 is a perspective view showing the ground structure of the rotating electric machine of Embodiment 1.
- FIG. It is a perspective view which shows the earthing
- FIG. 5 is a schematic diagram of a dump truck 100 including the rotating electric machine of this embodiment.
- the generator 10 is illustrated below as an example of the rotating electric machine, the rotating electric machine may be an electric motor.
- the dump truck 100 is a truck capable of unloading a load 100b such as earth and sand at a time by inclining the cargo bed 100a so that the front is high and the rear is low. ing.
- the rotating shafts of the generator 10 and the engine 20, and the rotating shafts of the generator 10 and the hydraulic pump 30 are connected to each other so that the driving force generated by the engine 20 can be transmitted to the generator 10 and the hydraulic pump 30. ..
- the driving force of the engine 20 can be converted into electric power by the generator 10 and can be converted into motive power for lifting the platform 100a by the hydraulic pump 30.
- the rotating shaft 10a protruding from the generator 10 toward the hydraulic pump 30 is provided with the earth structure 1 as a countermeasure against electrolytic corrosion.
- the rotary shaft 10a is exposed for reasons such as improving maintainability, and in a dirty environment such as a construction site where the dump truck 100 is used, dirt and dust rising from the ground adheres to the rotary shaft 10a.
- the earth structure 1 according to the present embodiment has a structure capable of coping with adhesion of mud and dust.
- FIG. 1 is a perspective view showing a ground structure 1 of this embodiment.
- the rotating shaft 10a shown here is supported by a bearing (not shown), and the earth structure 1 is mainly composed of a cleaning device 2, an earth device 3, and a mounting member 4.
- the mounting member 4 is a metal plate or the like fixed to the casing of the generator 10 or the like, and a pair of fixing portions 4a is attached to the base portion perpendicular to the rotating shaft 10a by welding or the like.
- the broom-shaped brush 2a is arranged such that the longitudinal direction of the rectangular cross section of the broom-shaped brush 2a coincides with the axial direction of the rotating shaft 10a by the fixing portion 4a and the sandwiching plate 2b on the upstream side in the rotating direction of the rotating shaft 10a.
- the grounding device 3 holds the broom-shaped conductive fibers 3a in a rectangular cross section by the fixing portion 4a and the sandwiching plate 3b on the downstream side with respect to the rotating direction of the rotating shaft 10a. It is sandwiched and held so as to coincide with the axial direction of.
- the broom-shaped brush 2a and the broom-shaped conductive fiber 3a are arranged in the radial direction so as to be substantially radial when viewed from the central axis of the rotating shaft 10a, and their tips are the outer periphery of the rotating shaft 10a.
- the surface is pressed and bent. Due to this bending, the contact area between the broom-shaped brush 2a or the broom-shaped conductive fiber 3a and the rotating shaft 10a is smaller than that when the tip end of the broom-shaped brush 2a or the broom-shaped conductive fiber 3a is simply contacted with the rotating shaft 10a. It's getting bigger.
- both the cleaning device 2 and the grounding device 3 are mounted on the same plane perpendicular to the rotating shaft 10a, when the rotating shaft 10a rotates, the rotating shaft which the tip end of the broom-shaped brush 2a passes while contacting.
- the tip of the broom-shaped conductive fiber 3a passes through the region of the outer peripheral surface of 10a while making contact.
- the cleaning device 2 and the earth device 3 are installed relatively close to each other so that the circumferential installation interval is about 30° to 90°.
- the ground structure 1 is installed one, but a plurality of ground structures 1 may be installed.
- both the broom-shaped brush 2a of the cleaning device 2 and the broom-shaped conductive fibers 3a of the grounding device 3 are arranged such that the longitudinal direction of the rectangular cross section is aligned with the axial direction of the rotating shaft 10a.
- the contact area with the rotating shaft 10a is increased not only by arranging it on the rotating shaft 10a, but also by pushing both end portions against the rotating shaft 10a so as to increase the cleaning ability of the cleaning device 2 and the grounding device 3. You can improve your ability together.
- the broom-shaped brush 2a of the cleaning device 2 arranged on the upstream side passes the outer peripheral surface region of the rotating shaft 10a, which passes through while cleaning dirt and dust, on the downstream side. Since the broom-shaped conductive fiber 3a of No. 3 follows the structure, even in a dirty environment where the dump truck 100 is used, the possibility that mud or dust will intervene between the grounding device 3 and the rotating shaft 10a is reduced. It is possible to stabilize the earthing performance of the earthing structure 1 as a whole and to suppress electrolytic corrosion of the bearing that supports the rotating shaft 10a.
- both the broom-shaped brush 2a and the broom-shaped conductive fiber 3a can be adjusted in the installation position with respect to the radial direction of the rotating shaft 10a. By re-adjusting the positions, the pressed states of the cleaning device 2 and the grounding device 3 can be appropriately maintained, so that the replacement cycle of the cleaning device 2 and the grounding device 3 can be lengthened.
- the generator 10 in which the cleaning device 2 is arranged on the upstream side and the grounding device 3 is arranged on the downstream side is exemplified.
- the broom-shaped brush 2a of the cleaning device 2 on the upstream side is replaced with the broom-shaped conductive fiber 3a. May be replaced with.
- the cleaning device 2 on the upstream side can also be provided with the grounding function, so that a more reliable grounding structure 1 can be realized.
- FIG. 2 is a perspective view showing the earth structure 1 of the second embodiment.
- the cleaning device 2 and the grounding device 3 are brought into contact with the outer peripheral surface of the rotating shaft 10a having a uniform diameter, but in the present embodiment, the shaft end portion of the rotating shaft 10a has a larger diameter.
- a flange portion 10b having a width narrower than that of the broom-shaped brush 2a is formed, and the cleaning device 2 and the earth device 3 are brought into contact with the outer peripheral surface of the flange portion 10b.
- the cleaning device 2 removes the mud and dust adhering to the outer peripheral surface of the flange portion 10b to the outside of the outer peripheral surface, the once removed mud and the like is grounded by the grounding device 3. Since the possibility of reattachment to the passage area such as the above is significantly suppressed, it is possible to realize a more reliable earth structure 1 as compared with the configuration of the first embodiment.
- the flange portion 10b may be integrally formed with the rotary shaft 10a, if the flange portion 10b is a separate component, the flange portion 10b deteriorates over time due to wear due to contact with the cleaning device 2 and the earth device 3. Even in such a case, since it is possible to replace only the flange portion 10b while leaving the rotating shaft 10a, which is generally difficult to replace, it is possible to improve maintainability.
- FIG. 3 is a perspective view showing the earth structure 1 of the third embodiment.
- the cleaning device 2 and the grounding device 3 were brought into contact with only the outer peripheral surfaces of the rotary shaft 10a and the flange portion 10b, but in the present example, the broom-shaped brush 2a and the broom-shaped conductive fiber 3a.
- the width of the cleaning device 2 or the grounding device 3 is also brought into contact with the shaft end of the rotary shaft 10a or the flange portion 10b by making the width of the flange portion 10b narrower.
- the contact area between the cleaning device 2 and the grounding device 3 and the rotating shaft 10a is further expanded, so that a higher dust removing effect and a higher grounding effect can be realized.
- Example 4 of the present invention will be described with reference to FIG. It should be noted that duplicated description is omitted for the common points with the above-described embodiment.
- FIG. 4 is a perspective view showing the earth structure 1 of the fifth embodiment.
- the length of the broom-shaped brush 2a of the cleaning device 2 and the length of the broom-shaped conductive fibers 3a of the grounding device 3 are made substantially equal, but in the present embodiment, the broom-shaped conductivity is set. The length of the fiber 3a is greatly extended.
- the contact area between the earthing device 3 and the rotating shaft 10a can be greatly expanded, so that not only a higher earthing effect can be realized, but also in the configurations of the first to third embodiments, the observation is made.
- the wear state of the contact surface of the earthing device 3 which is difficult to be worn can be easily observed by lifting the broom-shaped conductive fiber 3a.
- the present invention is not limited to the above-described embodiments, but includes various modifications.
- the above-described embodiments have been described in detail for the purpose of explaining the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described.
- a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Motor Or Generator Frames (AREA)
- Cleaning Of Streets, Tracks, Or Beaches (AREA)
- Cleaning In General (AREA)
Abstract
Description
例えば、上記した実施例は本発明を分かりやすく説明するために詳細に説明したものであり、必ずしも説明した全ての構成を備えるものに限定されるものではない。また、ある実施例の構成の一部を他の実施例の構成に置き換えることが可能であり、また、ある実施例の構成に他の実施例の構成を加えることも可能である。また、各実施例の構成について、他の構成の追加、削除、置換をすることが可能である。 It should be noted that the present invention is not limited to the above-described embodiments, but includes various modifications.
For example, the above-described embodiments have been described in detail for the purpose of explaining the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the configurations described. Further, a part of the configuration of a certain embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of a certain embodiment. Further, it is possible to add, delete, or replace other configurations with respect to the configurations of the respective embodiments.
Claims (7)
- 回転軸と接触するアース構造を備えた回転電機であって、
該アース構造は、一対の固定部を備えた取付部材と、前記回転軸の回転方向に対して上流側の固定部に設置された清掃装置と、前記回転軸の回転方向に対して下流側の固定部に設置されたアース装置と、を有し、
前記清掃装置は、矩形断面の長手方向が前記回転軸の軸方向と略一致するように設置されたほうき状ブラシを有するとともに、
前記アース装置は、矩形断面の長手方向が前記回転軸の軸方向と略一致するように設置されたほうき状導電性繊維を有しており、
前記清掃装置と前記アース装置は、前記回転軸の回転時に、前記ほうき状ブラシの先端部が接触しながら通過した前記回転軸の外周面の領域内を、前記ほうき状導電性繊維の先端部が接触しながら通過するように設置されていることを特徴とする回転電機。 A rotating electric machine having a ground structure that comes into contact with a rotating shaft,
The ground structure includes a mounting member having a pair of fixing portions, a cleaning device installed on a fixing portion on the upstream side with respect to the rotating direction of the rotating shaft, and a cleaning device on the downstream side with respect to the rotating direction of the rotating shaft. And a grounding device installed on the fixed part,
The cleaning device has a broom-like brush installed so that the longitudinal direction of the rectangular cross section thereof substantially coincides with the axial direction of the rotating shaft,
The grounding device has a broom-shaped conductive fiber installed so that the longitudinal direction of the rectangular cross section substantially coincides with the axial direction of the rotating shaft,
In the cleaning device and the grounding device, when the rotating shaft rotates, the tip of the broom-shaped conductive fiber is within the region of the outer peripheral surface of the rotating shaft that the tip of the broom-shaped brush passes while contacting. A rotating electric machine, which is installed so as to pass while making contact. - 前記ほうき状導電性繊維と前記ほうき状ブラシの先端部は、前記回転軸に押圧され撓んでおり、
前記ほうき状導電性繊維と前記ほうき状ブラシの前記回転軸の軸方向に対する設置位置は調整可能であることを特徴とする請求項1に記載の回転電機。 The broom-shaped conductive fiber and the tip of the broom-shaped brush are pressed and bent by the rotating shaft,
The rotary electric machine according to claim 1, wherein the installation positions of the broom-shaped conductive fiber and the broom-shaped brush with respect to the axial direction of the rotation shaft are adjustable. - 前記清掃装置の前記ほうき状ブラシを前記ほうき状導電性繊維に置換したことを特徴とする請求項2に記載の回転電機。 The rotating electric machine according to claim 2, wherein the broom-shaped brush of the cleaning device is replaced with the broom-shaped conductive fiber.
- 前記回転軸の軸端部にフランジ部を形成し、
前記ほうき状導電性繊維と前記ほうき状ブラシを前記フランジ部と接触させたことを特徴とする請求項2に記載の回転電機。 A flange portion is formed on the shaft end portion of the rotating shaft,
The rotating electrical machine according to claim 2, wherein the broom-shaped conductive fiber and the broom-shaped brush are brought into contact with the flange portion. - 前記回転軸の軸端部と、前記ほうき状導電性繊維と前記ほうき状ブラシの先端部を接触させたことを特徴とする請求項2に記載の回転電機。 The rotary electric machine according to claim 2, wherein the shaft end of the rotary shaft is in contact with the broom-shaped conductive fiber and the tip of the broom-shaped brush.
- 前記ほうき状導電性繊維の長さを、前記ほうき状ブラシの長さよりも長くしたことを特徴とする請求項2に記載の回転電機。 The rotating electric machine according to claim 2, wherein the length of the broom-shaped conductive fiber is longer than the length of the broom-shaped brush.
- 請求項1~6の何れか一項に記載の回転電機を搭載したことを特徴とするダンプトラック。 A dump truck equipped with the rotating electric machine according to any one of claims 1 to 6.
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AU2020215361A AU2020215361B9 (en) | 2019-02-01 | 2020-01-16 | Rotating electric machine and dump truck equipped therewith |
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JP2019-017084 | 2019-02-01 | ||
JP2019017084A JP7090569B2 (en) | 2019-02-01 | 2019-02-01 | Rotating electric machine and dump truck equipped with this |
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PCT/JP2020/001137 WO2020158396A1 (en) | 2019-02-01 | 2020-01-16 | Rotating electric machine and dump truck equipped therewith |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN112202314A (en) * | 2020-10-09 | 2021-01-08 | 安徽沃弗永磁科技有限公司 | Permanent magnet speed regulator with dust removal structure |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
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DE102021211981A1 (en) | 2021-10-25 | 2023-04-27 | Zf Friedrichshafen Ag | Shaft grounding device for creating an electrically conductive connection between a rotatable shaft and a housing |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5548355U (en) * | 1978-09-27 | 1980-03-29 | ||
JPH0819207A (en) * | 1994-06-30 | 1996-01-19 | Toshiba Corp | Shaft grounding device |
-
2019
- 2019-02-01 JP JP2019017084A patent/JP7090569B2/en active Active
-
2020
- 2020-01-16 WO PCT/JP2020/001137 patent/WO2020158396A1/en active Application Filing
- 2020-01-16 AU AU2020215361A patent/AU2020215361B9/en active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5548355U (en) * | 1978-09-27 | 1980-03-29 | ||
JPH0819207A (en) * | 1994-06-30 | 1996-01-19 | Toshiba Corp | Shaft grounding device |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112202314A (en) * | 2020-10-09 | 2021-01-08 | 安徽沃弗永磁科技有限公司 | Permanent magnet speed regulator with dust removal structure |
CN112202314B (en) * | 2020-10-09 | 2021-12-07 | 安徽沃弗永磁科技有限公司 | Permanent magnet speed regulator with dust removal structure |
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AU2020215361B9 (en) | 2022-09-15 |
AU2020215361A1 (en) | 2021-07-22 |
AU2020215361B2 (en) | 2022-08-25 |
JP2020127257A (en) | 2020-08-20 |
JP7090569B2 (en) | 2022-06-24 |
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