CN216564838U - Shaft grounding ring suitable for high-rotating-speed motor - Google Patents
Shaft grounding ring suitable for high-rotating-speed motor Download PDFInfo
- Publication number
- CN216564838U CN216564838U CN202122796570.4U CN202122796570U CN216564838U CN 216564838 U CN216564838 U CN 216564838U CN 202122796570 U CN202122796570 U CN 202122796570U CN 216564838 U CN216564838 U CN 216564838U
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- China
- Prior art keywords
- copper
- silver
- carbon fiber
- plated carbon
- grounding ring
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- 229910052802 copper Inorganic materials 0.000 claims abstract description 87
- 239000010949 copper Substances 0.000 claims abstract description 87
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 84
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 27
- 239000004917 carbon fiber Substances 0.000 claims abstract description 27
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 27
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims abstract description 15
- 239000004810 polytetrafluoroethylene Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims description 22
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005299 abrasion Methods 0.000 abstract description 8
- -1 polytetrafluoroethylene) ring Polymers 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000002657 fibrous material Substances 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
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- Motor Or Generator Frames (AREA)
Abstract
The utility model discloses a shaft grounding ring suitable for a high-rotating-speed motor, which relates to the technical field of high-rotating-speed variable frequency motors and is used for solving the problem of serious shaft abrasion under the condition of high rotating speed, and the shaft grounding ring suitable for the high-rotating-speed motor comprises a copper shell, a copper hoop and a silver-plated carbon fiber bundle, wherein the copper shell is annular, the copper hoop is embedded in the copper shell, the silver-plated carbon fiber bundle penetrates through the copper hoop, the silver-plated carbon fiber bundle is extended out from the inner end of the copper shell, a copper top wire is arranged on the copper shell and used for fixing the copper hoop, and a PTFE (polytetrafluoroethylene) ring for sealing is arranged on the copper shell. The problem of new forms of energy motor high frequency shaft voltage bring potential harm to motor bearing and system is solved.
Description
Technical Field
The utility model relates to the technical field of high-rotating-speed variable-frequency motors, in particular to a shaft grounding ring suitable for a high-rotating-speed motor.
Background
At present, the requirement on the power of a motor of a new energy automobile is higher, the rotating speed is higher, the limit value generally reaches 20000r/m, the rotating speed of a common industrial motor is 2000-3000 r/m, and the great improvement of the rotating speed is a serious challenge to the service life of an axle grounding ring. The ultrahigh rotating speed can cause the abrasion of the carbon fiber wire and the shaft to be aggravated, the temperature is increased, more importantly, the service life of the grounding ring is greatly shortened, and the service life of 10-15 years which can not meet the industrial requirements is greatly prolonged. The power of a motor of a new energy automobile is higher and higher, but the size of the motor is not increased, so that a small-size grounding ring which can only be installed on a small-power industrial motor originally is used on a high-power and compact-structure new energy motor, the effect of reducing the shaft voltage is limited by the size of the shaft diameter, and the protection effect on the motor is greatly reduced. At present, a novel shaft grounding ring suitable for high rotating speed, high power and small shaft diameter size needs to be developed to meet the requirement of market development.
Therefore, the present invention is invented in view of the above-mentioned disadvantages of practical manufacture and implementation, and is based on the spirit and concept of the solution, and is assisted by professional knowledge and experience, and after many kinds of ingenuity and experiments, and provides a shaft grounding ring suitable for high-speed motors, so as to solve the problem of serious shaft wear under high-speed conditions.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a shaft grounding ring suitable for a high-rotation-speed motor, which is used for solving the problem of serious shaft abrasion under the condition of high rotation speed in the prior art.
The technical scheme of the utility model is realized as follows: the utility model provides a shaft grounding ring suitable for high rotational speed motor, includes copper casing, copper clamp and silver-plated carbon fiber bundle, the copper casing is the annular, the copper clamp is embedded in the copper casing, silver-plated carbon fiber bundle passes the copper clamp, silver-plated carbon fiber bundle is from the inner of copper casing to visit out, be provided with the copper jackscrew on the copper casing, the copper jackscrew is used for fixed copper clamp, be provided with the PTFE ring that is used for sealing on the copper casing.
As a preferred embodiment, be provided with the conductive fiber mounting hole tang on the copper jackscrew, the conductive fiber mounting hole tang includes annular installation macrostoma in outer end and the osculum in inner, installation macrostoma and installation osculum junction are hourglass shape, the copper clamp sets up in the installation macrostoma, silver-plated carbon fiber bundle is followed and is visited out in the installation osculum.
In a preferred embodiment, the conductive fiber mounting hole seam allowance is provided in plurality, each of the conductive fiber mounting hole seam allowances corresponds to one group of silver-plated carbon fiber bundles, and the silver-plated carbon fiber bundles penetrating through each of the conductive fiber mounting hole seam allowances are provided in a plurality of groups.
In a preferred embodiment, the copper jackscrew is provided in plurality, and each copper jackscrew is circumferentially distributed outside the copper clamp.
In a preferred embodiment, each of the copper jackscrews is screwed to the copper housing.
In a preferred embodiment, the PTFE rings are located inside the copper shell, and there are two PTFE rings, and the two PTFE rings are distributed at the left and right ends inside the copper shell.
The utility model has the beneficial effects that:
by adopting the technical scheme of the utility model, the abrasion between the conductive fiber material and the motor shaft is greatly reduced, and the non-contact conductivity better than that of the conductive fiber of the traditional resin coating can be realized by electron transition in a non-contact state (a nano-scale gap). Compared with a contact carbon brush or a common shaft grounding ring, the utility model solves the problem of shaft abrasion under the working condition of high rotating speed, improves the non-contact conductivity by enhancing, prolongs the service life and can realize reliable working life of more than 10 years. The utility model is suitable for the working conditions of high rotating speed, high power and small shaft diameter size, has the advantages of convenient installation and maintenance-free, and solves the problem that the high-frequency shaft voltage of the new energy motor brings potential harm to the motor bearing and the system thereof.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
fig. 2 is a front view of an embodiment of the present invention.
In the figure, 1-copper shell; 2-a PTFE ring; 3-copper jackscrew; 4-copper clamp; 5-conductive fiber mounting hole spigot; 6-silver-plated carbon fiber bundles.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In the description of the embodiments, the terms "disposed," "connected," and the like are to be construed broadly unless otherwise explicitly specified or limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; either directly or through an intervening medium, or through internal communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-2, a shaft grounding ring suitable for a high-speed motor comprises a copper shell 1, a copper clamp 4 and a silver-plated carbon fiber bundle 6, wherein the copper shell 1 is annular, the copper clamp 4 is embedded in the copper shell 1, the silver-plated carbon fiber bundle 6 passes through the copper clamp 4, the silver-plated carbon fiber bundle 6 is extended out from the inner end of the copper shell 1, a copper jack screw 3 is arranged on the copper shell 1, the copper jack screw 3 is used for fixing the copper clamp 4, and a PTFE ring 2 for sealing is arranged on the copper shell 1.
Be provided with conductive fiber mounting hole tang 5 on the copper jackscrew 3, conductive fiber mounting hole tang 5 includes the annular installation macrostoma in outer end and the osculum in inner, and the installation macrostoma is hourglass hopper-shaped with installation osculum junction, and copper hoop 4 sets up in the installation macrostoma, and silver-plated carbon fiber bundle 6 is followed and is visited out in the installation osculum.
The conductive fiber mounting hole spigots 5 are provided in plurality, each conductive fiber mounting hole spigot 5 corresponds to one group of silver-plated carbon fiber bundles 6, and the silver-plated carbon fiber bundles 6 penetrating through each conductive fiber mounting hole spigot 5 are provided in a plurality of groups.
The copper jackscrew 3 is provided with a plurality of, and each copper jackscrew 3 circumference distributes in the copper hoop 4 outside.
Each copper jackscrew 3 is screwed with the copper shell 1.
The PTFE ring 2 is located the inboard of copper casing 1, and PTFE ring 2 is provided with two, and two PTFE rings 2 distribute both ends about copper casing 1 is inboard.
The utility model is realized in such a way that:
the utility model comprises a copper stationary ring, the outer circle of the copper stationary ring is subjected to finish machining control, the copper stationary ring is in interference fit with the inner hole of the motor end cover, and the copper stationary ring is installed in a cold pressing mode, so that the installation is ensured to be firm, and the copper stationary ring has a very low resistance value. Replacing the usual resin-coated conductive fibres with silver-plated carbon fibre bundles 6 reduces the resistance by at least 80%. The silver-plated carbon fiber bundle 6 is clamped through the copper clamp 4 to ensure that the silver-plated conductive fiber bundle cannot fall off, and the copper clamp 4 is fixed with the copper jackscrew 3 through a conductive fiber bundle mounting hole spigot. The PTFE ring 2 is in line contact with a motor shaft, so that grease in the motor can be prevented from polluting the silver-plated carbon fiber bundle 6, external water and dust can be prevented from polluting the conductive fiber bundle, and the conductive performance is always ensured to be in the best state.
Capacitive shaft voltage of the variable frequency motor is connected with a motor end cover through the silver-plated carbon fiber bundles 6, the copper clamp 4 and the copper shell 1, and shaft current is led away after the motor end cover is grounded. The silver-plated conductive carbon fiber bundle can reduce interference with the shaft, thereby reducing abrasion. Meanwhile, due to the adoption of the silver-plated conductive fiber material, even under the non-contact condition, electrons on the shaft can jump to the silver-plated conductive fiber bundle through the ionization effect, so that the non-contact conductivity is better ensured.
The utility model has the beneficial effects that:
by adopting the technical scheme of the utility model, the abrasion between the conductive fiber material and the motor shaft is greatly reduced, and the non-contact conductivity better than that of the conductive fiber of the traditional resin coating can be realized by electron transition in a non-contact state (a nano-scale gap). Compared with a contact carbon brush or a common shaft grounding ring, the utility model solves the problem of shaft abrasion under the working condition of high rotating speed, improves the non-contact conductivity by enhancing, prolongs the service life and can realize reliable working life of more than 10 years. The utility model is suitable for the working conditions of high rotating speed, high power and small shaft diameter size, has the advantages of convenient installation and maintenance-free, and solves the problem that the high-frequency shaft voltage of the new energy motor brings potential harm to the motor bearing and the system thereof.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization of those skilled in the art; where combinations of features are mutually inconsistent or impractical, such combinations should not be considered as being absent and not within the scope of the claimed invention.
Claims (6)
1. The utility model provides a shaft grounding ring suitable for high rotational speed motor, its characterized in that, includes copper casing, copper clamp and silver-plated carbon fiber bundle, the copper casing is the annular, the copper clamp is embedded in the copper casing, silver-plated carbon fiber bundle passes the copper clamp, silver-plated carbon fiber bundle is from the inner of copper casing and lean out, be provided with the copper jackscrew on the copper casing, the copper jackscrew is used for fixed copper clamp, be provided with the PTFE ring that is used for sealing on the copper casing.
2. The shaft grounding ring suitable for the high-speed motor is characterized in that a conductive fiber mounting hole spigot is arranged on the copper jackscrew and comprises an outer end annular mounting large opening and an inner end small opening, the joint of the mounting large opening and the mounting small opening is in a funnel shape, the copper hoop is arranged in the mounting large opening, and the silver-plated carbon fiber bundle extends out of the mounting small opening.
3. The shaft grounding ring for the high-speed motor according to claim 2, wherein the conductive fiber mounting hole spigots are provided in plurality, each group of the conductive fiber mounting hole spigots corresponds to one group of silver-plated carbon fiber bundles, and the silver-plated carbon fiber bundles penetrating through each conductive fiber mounting hole spigots are provided in a plurality of groups.
4. The shaft grounding ring for the high-speed motor as claimed in claim 1, wherein the copper jackscrew is provided in plurality, and each copper jackscrew is circumferentially distributed outside the copper clamp.
5. A shaft grounding ring adapted for high speed electrical machines as in claim 4 wherein each of said copper jackscrews is threadedly connected to the copper housing.
6. The shaft grounding ring suitable for the high-speed motor is characterized in that the PTFE rings are positioned on the inner side of the copper shell, the number of the PTFE rings is two, and the two PTFE rings are distributed at the left end and the right end of the inner side of the copper shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122796570.4U CN216564838U (en) | 2021-11-15 | 2021-11-15 | Shaft grounding ring suitable for high-rotating-speed motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122796570.4U CN216564838U (en) | 2021-11-15 | 2021-11-15 | Shaft grounding ring suitable for high-rotating-speed motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216564838U true CN216564838U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122796570.4U Active CN216564838U (en) | 2021-11-15 | 2021-11-15 | Shaft grounding ring suitable for high-rotating-speed motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216564838U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117081302A (en) * | 2023-08-28 | 2023-11-17 | 和骋新材料科技(上海)有限公司 | An oil-sealed conductive ring, oil-cooled motor and electric drive system |
-
2021
- 2021-11-15 CN CN202122796570.4U patent/CN216564838U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117081302A (en) * | 2023-08-28 | 2023-11-17 | 和骋新材料科技(上海)有限公司 | An oil-sealed conductive ring, oil-cooled motor and electric drive system |
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