CN113300539A - Cooling and lubricating system of electric propeller - Google Patents
Cooling and lubricating system of electric propeller Download PDFInfo
- Publication number
- CN113300539A CN113300539A CN202110612834.8A CN202110612834A CN113300539A CN 113300539 A CN113300539 A CN 113300539A CN 202110612834 A CN202110612834 A CN 202110612834A CN 113300539 A CN113300539 A CN 113300539A
- Authority
- CN
- China
- Prior art keywords
- shell
- oil
- propeller
- control circuit
- sealing box
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 38
- 230000001050 lubricating effect Effects 0.000 title claims abstract description 30
- 239000003921 oil Substances 0.000 claims abstract description 64
- 238000007789 sealing Methods 0.000 claims abstract description 42
- 239000010687 lubricating oil Substances 0.000 claims abstract description 18
- 239000003638 chemical reducing agent Substances 0.000 claims description 19
- 239000010705 motor oil Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
- H02K9/193—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil with provision for replenishing the cooling medium; with means for preventing leakage of the cooling medium
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/0412—Cooling or heating; Control of temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/04—Features relating to lubrication or cooling or heating
- F16H57/042—Guidance of lubricant
-
- 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
- H02K5/10—Casings or enclosures characterised by the shape, form or construction thereof with arrangements for protection from ingress, e.g. water or fingers
-
- 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
- H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
Abstract
An electric propeller cooling and lubricating system, wherein the inside of a shell of a propeller body is used as an oil tank; the connector is used as an oil pump, an oil outlet port is formed in a shell of the connector and connected with an oil inlet pipe, an inner cavity of the connector is communicated with the inside of the control circuit sealing box through the oil inlet pipe, and the control circuit sealing box is communicated with the inside of a shell of the propeller body through a return pipe; in the working state, lubricating oil is filled in the shell of the propeller body, the motor shaft rotates to drive the turbine of the connector to rotate, the turbine of the connector drives the oil loop, the turbine in the oil loop conveys oil from the shell of the propeller body to the control circuit sealing box, and the oil in the control circuit sealing box flows back to the shell of the propeller body through the return pipe. The cooling and lubricating system of the electric propeller not only can play a role in cooling and lubricating the motor, but also provides conditions for improving the power of the motor.
Description
Technical Field
The invention relates to the field of underwater propellers, in particular to a cooling and lubricating system of an electric propeller.
Background
Many advantages and enjoyment of electric thrusters in inland and canal navigation are well known; the traditional marine propeller is a propeller which is driven by a fuel engine arranged at the tail of a ship, but the traditional marine propeller is complex in structure, high in noise, and not environment-friendly and has certain pollution to water quality. Compared with the traditional propeller, most of the existing electric propellers (see fig. 1) have the characteristics of high efficiency conversion rate, no noise during working and the like, and are pursued by people, but the horsepower of the electric propeller is far less than that of a fuel engine, the boat-going experience is sometimes influenced, if the horsepower is required to be increased, a motor with higher power needs to be replaced, the cost is greatly increased, the volume and the weight of the electric propeller are increased, and the existing electric propeller is in a secondary position in the market due to the influence of the controlled horsepower and the reliability.
Disclosure of Invention
The invention aims to provide a cooling and lubricating system of an electric propeller, which is added on the basis of the original power system of the electric propeller, not only can play a role in cooling and lubricating a motor, but also can improve the power of the motor, and simultaneously can play an effective waterproof role, thereby improving the experience effect of the electric propeller. The convenience and reliability of the use of the electric thruster can be greatly improved. The cooling and lubricating system of the electric propeller is expected to bring the electric propeller more environment-friendly and improve the superior use experience.
The technical scheme adopted by the invention is as follows: a cooling and lubricating system of an electric propeller is used on a propeller body and a control circuit sealing box, wherein the propeller body is connected with the control circuit sealing box through a supporting pipe frame; the propeller body comprises a shell, a motor sealed in the shell and a propeller positioned outside the shell, wherein a motor shaft is connected with an input shaft of the speed reducer through a connector, and a rotating shaft of the propeller is connected with an output shaft of the speed reducer; the inside of the shell of the propeller body is used as an oil tank, and an oil discharge port with a plug is formed in the shell; a motor oil inlet hole is formed in the shell of the motor; an oil inlet hole of the speed reducer is formed in the shell of the speed reducer; the connector is used as an oil pump, an oil outlet port is formed in a shell of the connector and connected with an oil inlet pipe, an inner cavity of the connector is communicated with the inside of the control circuit sealing box through the oil inlet pipe, and the control circuit sealing box is communicated with the inside of a shell of the propeller body through a return pipe; an oil inlet is formed in the control circuit sealing box and is provided with an oil inlet cover; in the working state, lubricating oil is filled in the shell of the propeller body, the motor shaft rotates to drive the turbine of the connector to rotate, the turbine of the connector drives the oil loop, the turbine in the oil loop conveys oil from the shell of the propeller body to the control circuit sealing box, and the oil in the control circuit sealing box flows back to the shell of the propeller body through the return pipe.
The further technical scheme is as follows: an observation hole is arranged at the joint of the return pipe and the shell of the propeller body.
The further technical scheme is as follows: the control circuit sealing box is also provided with a pressure relief hole, a pressure relief pipe is arranged in the pressure relief hole, one end of the pressure relief pipe is positioned outside the control circuit sealing box and communicated with the atmosphere, and the other end of the pressure relief pipe is positioned at the upper part in the control circuit sealing box and communicated with the inside of the control circuit sealing box.
The further technical scheme is as follows: the inner diameter of the pressure relief pipe is 3-5 mm.
The further technical scheme is as follows: and the outer side of the return pipe is provided with a radiating fin.
Due to the adoption of the technical scheme, the cooling and lubricating system of the electric propeller has the following beneficial effects:
the cooling and lubricating system of the electric propeller is formed by modifying the propeller body I and the control circuit sealing box II of the original electric propeller, has a simple structure, and plays a role in cooling and lubricating heating components such as a motor, a speed reducer, a bearing, an oil seal and the like of the electric propeller. Meanwhile, a large amount of heat can be generated on circuit elements by the current of the motor for controlling the propeller, and the function of cooling and oxidation resistance is achieved. Provides conditions for greatly improving the power of the motor.
The technical features of an electric propeller cooling and lubricating system according to the present invention will be further described with reference to the accompanying drawings and embodiments.
Drawings
Fig. 1 is a schematic structural diagram of an electric propeller cooling and lubricating system of the present invention.
In the figure:
i, a propeller body; II, controlling a circuit sealing box; 1-a housing; 11-an oil drain port; 2, a motor; 21-motor oil inlet hole; 22-a motor rotor; 3, a propeller; 4-a connector; 41-oil outlet interface; 42-a turbine; 5-a speed reducer; 51-a reducer oil inlet; 6-oil inlet pipe; 7-a return pipe; 8-a pressure relief vent; 9-an oil inlet; 10-a viewing aperture; 12-oil sealing; 13-heat sink.
Detailed Description
As shown in fig. 1: a cooling and lubricating system of an electric propeller is used on a propeller body I and a control circuit sealing box II. The propeller body I is connected with the control circuit sealing box II through a support pipe frame; a control circuit for controlling the working state of the motor is arranged in the control circuit sealing box; the propeller body I comprises a shell 1, a motor 2 sealed in the shell and a propeller 3 positioned outside the shell, wherein a motor shaft is connected with an input shaft of a speed reducer 5 through a connector 4, and a rotating shaft of the propeller 3 is connected with an output shaft of the speed reducer 5; an oil seal 12 is arranged at the joint of the propeller 3 and the shell 1 of the propeller body.
The cooling and lubricating system of the electric propeller adopts the interior of the shell 1 of the propeller body as an oil tank, and the shell 1 is provided with an oil outlet 11 with a plug for discharging lubricating oil in the shell. In order to facilitate the lubricating oil to enter the inner cavity of the connector shell, a motor oil inlet hole 21 is formed in the shell of the motor 2; and a speed reducer oil inlet hole 51 is formed in the shell of the speed reducer 5. The connector 4 is used as an oil pump, an oil outlet port 41 is formed in the shell of the connector 4, the oil outlet port 41 is connected with an oil inlet pipe 6, the inner cavity of the connector 4 is communicated with the interior of a control circuit sealing box II through the oil inlet pipe 6, and the control circuit sealing box II is communicated with the interior of the shell 1 of the propeller body through a return pipe 7; an oil inlet 9 is formed in the control circuit sealing box II, and an oil inlet cover is arranged at the oil inlet 9; please supplement the effect of the pressure relief vent.
In a working state, lubricating oil is filled in the shell 1 of the propeller body, the general lubricating oil can be engine oil and enters the inner cavity of the connector shell through the motor oil inlet 21 and the speed reducer oil inlet 51, the motor shaft rotates to drive the turbine 42 of the connector to rotate, the turbine of the connector drives an oil loop, the turbine in the oil loop conveys the oil from the shell 1 of the propeller body to the control circuit sealing box II, and the oil in the control circuit sealing box II flows back to the shell 1 of the propeller body through the return pipe 7.
The aperture of motor inlet port 21 and speed reducer inlet port 51 will adapt to the volume size of motor, need confirm through experimental data because if the aperture of motor inlet port 21 and speed reducer inlet port 51 is too little, lubricating oil gets into the inside too little of motor, does not play the effect of cooling the motor, nevertheless if the aperture is too big, lubricating oil gets into the inside too much of motor, and the resistance can grow when the motor rotates, and the energy consumption can increase, leads to the motor to generate heat seriously, and the performance and the normal operating that will influence the motor again if generating heat seriously.
In order to conveniently judge whether the lubricating oil is filled in the shell 1 of the propeller body, an observation hole 10 is formed at the joint of the return pipe 7 and the shell 1 of the propeller body, and the condition that the lubricating oil is filled in the shell 1 of the propeller body is checked from the observation hole 10. The lubricating oil is not filled too much, is not too little, has too much motor running resistance and cannot play a real cooling effect, so that the lubricating oil is observed from the observation hole 10 to fill the inside of the shell 1 of the propeller body.
In order to keep the stability of the air pressure inside the cooling and lubricating system of the electric thruster, the electric thruster can work better, a pressure relief hole 8 is further formed in the control circuit sealing box II, a pressure relief pipe is arranged in the pressure relief hole 8, one end of the pressure relief pipe is located outside the control circuit sealing box II and communicated with the atmosphere, and the other end of the pressure relief pipe is located on the upper portion in the control circuit sealing box II and communicated with the control circuit sealing box II. The inner diameter of the pressure relief pipe is preferably 3-5 mm. Having had pressure relief device, having avoided when this electronic impeller cooling and lubrication system inside atmospheric pressure is too big, lubricating oil from the phenomenon of oil blanket 12 outwards revealing, also avoided when this electronic impeller cooling and lubrication system inside atmospheric pressure is too little, water enters into the inside phenomenon of motor from oil blanket 12.
In order to make the cooling effect of the cooling and lubricating system of the electric impeller better, a cooling fin 13 is arranged outside the return pipe 7.
Under general conditions, the support pipe support between propeller body I and control circuit seal box II is exactly a sealed tube, and the electric wire is walked in the sealed tube, can regard as back flow pipe 7 to the support pipe support at this moment.
The working principle of the cooling and lubricating system of the electric propeller is as follows:
the speed regulator in the control circuit seal box II controls the rotating speed of the motor and the positive and negative rotation of the motor, the electric wire enters the shell 1 of the propeller body through the return pipe 7 and is electrically connected with the motor 2, the motor rotor 22 rotates to drive the turbine 42 to rotate after the motor is powered on, lubricating oil enters the control circuit seal box II through the oil inlet pipe 6 from the oil interface 41 under the centrifugal force of the turbine, and then returns to the propeller body I through the return pipe 7, so that the whole lubricating oil circulation process is formed.
The heat absorbed throughout the circulation of the lubricant is dissipated by the propeller housing, which is in contact with outside water and air.
This test experiment data of electronic propeller cooling and lubrication system performance:
taking a motor with 12V and one kilowatt of rated voltage as an example for experiment, a 24V voltage is used for a comparison experiment (the same motor) through a cooling and lubricating system, and the experiment proves that the doubled voltage can generate about four times of current. According to ohm's law (power = voltage x current), when voltage is 12V, the power generated by the motor: 12V 84A = 1000W; when the voltage is 24V, the power generated by the motor is: 24V 336A =8064W, it can be seen that the electric thruster using the cooling and lubricating system of the electric thruster increases the power by eight times, and the work applied to the propeller rotates at a higher speed and has a larger torque. Theoretically, the increase of the power of the motor can be realized by only increasing the electrifying voltage of the motor, but a reliable cooling and lubricating system is required.
The cooling and lubricating system of the electric propeller skillfully utilizes the structural characteristics of the propeller to design a lubricating oil (lubricating oil) circulation, and the lubricating cooling system formed by the propeller effectively absorbs and transfers heat generated by the operation of the motor, the speed reducer, the bearing, the oil seal and the like in the propeller body I and the circuit elements in the control circuit sealing box II in the circulation process.
The parts not involved in the present invention are the same as or can be implemented using the prior art. While the invention has been described in detail with reference to specific preferred embodiments thereof, it will be understood by those skilled in the art that the present invention is not limited to the details of the foregoing embodiments, and various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. A cooling and lubricating system of an electric propeller is used on a propeller body and a control circuit sealing box, wherein the propeller body is connected with the control circuit sealing box through a supporting pipe frame; the propeller body comprises a shell, a motor sealed in the shell and a propeller positioned outside the shell, wherein a motor shaft is connected with an input shaft of the speed reducer through a connector, and a rotating shaft of the propeller is connected with an output shaft of the speed reducer; the method is characterized in that: the inside of the shell of the propeller body is used as an oil tank, and an oil discharge port with a plug is formed in the shell; a motor oil inlet hole is formed in the shell of the motor; an oil inlet hole of the speed reducer is formed in the shell of the speed reducer; the connector is used as an oil pump, an oil outlet port is formed in a shell of the connector and connected with an oil inlet pipe, an inner cavity of the connector is communicated with the inside of the control circuit sealing box through the oil inlet pipe, and the control circuit sealing box is communicated with the inside of a shell of the propeller body through a return pipe; an oil inlet is formed in the control circuit sealing box and is provided with an oil inlet cover; in the working state, lubricating oil is filled in the shell of the propeller body, the motor shaft rotates to drive the turbine of the connector to rotate, the turbine of the connector drives the oil loop, the turbine in the oil loop conveys oil from the shell of the propeller body to the control circuit sealing box, and the oil in the control circuit sealing box flows back to the shell of the propeller body through the return pipe.
2. The electric propeller cooling and lubricating system according to claim 1, wherein: an observation hole is arranged at the joint of the return pipe and the shell of the propeller body.
3. An electric thruster cooling and lubricating system as claimed in claim 2, wherein: the control circuit sealing box is also provided with a pressure relief hole, a pressure relief pipe is arranged in the pressure relief hole, one end of the pressure relief pipe is positioned outside the control circuit sealing box and communicated with the atmosphere, and the other end of the pressure relief pipe is positioned at the upper part in the control circuit sealing box and communicated with the inside of the control circuit sealing box.
4. An electric thruster cooling and lubricating system as claimed in claim 2, wherein: the inner diameter of the pressure relief pipe is 3-5 mm.
5. The electric propeller cooling and lubricating system according to claim 1, wherein: and the outer side of the return pipe is provided with a radiating fin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110612834.8A CN113300539B (en) | 2021-06-02 | 2021-06-02 | Cooling and lubricating system of electric propeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110612834.8A CN113300539B (en) | 2021-06-02 | 2021-06-02 | Cooling and lubricating system of electric propeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113300539A true CN113300539A (en) | 2021-08-24 |
| CN113300539B CN113300539B (en) | 2023-11-28 |
Family
ID=77326823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110612834.8A Active CN113300539B (en) | 2021-06-02 | 2021-06-02 | Cooling and lubricating system of electric propeller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113300539B (en) |
Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0721500U (en) * | 1993-09-27 | 1995-04-18 | 川崎重工業株式会社 | Pod propeller |
| CN1225608A (en) * | 1996-06-26 | 1999-08-11 | 西门子公司 | Pod-like ship propulsion system with synchronous motor |
| JP2005186748A (en) * | 2003-12-25 | 2005-07-14 | Kawasaki Heavy Ind Ltd | Pod type propeller and vessel provided with it |
| WO2013072549A1 (en) * | 2011-11-18 | 2013-05-23 | Wärtsilä Finland Oy | A method of arranging the lubrication of a steerable thruster of a marine vessel and a lubrication arrangement therefor |
| WO2013072548A1 (en) * | 2011-11-18 | 2013-05-23 | Wärtsilä Finland Oy | A method of and an arrangement for controlling the oil level in a pod of a steerable thruster of a marine vessel |
| FI20116328A (en) * | 2011-12-28 | 2013-05-31 | Waertsilae Finland Oy | Method and arrangement for improving the lubrication system of a watercraft propulsion unit |
| CN104276271A (en) * | 2013-07-09 | 2015-01-14 | Abb有限公司 | Ship's propulsion unit |
| WO2015007587A1 (en) * | 2013-07-18 | 2015-01-22 | Siemens Aktiengesellschaft | Electric pod drive for a ship |
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| CN107776862A (en) * | 2016-08-31 | 2018-03-09 | 柳州市向日葵智能机械科技有限公司 | A kind of electric plating propulsion |
| CN108146605A (en) * | 2016-12-06 | 2018-06-12 | 柳州市向日葵智能机械科技有限公司 | A kind of electric plating propulsion |
| CN109494935A (en) * | 2017-09-13 | 2019-03-19 | 西门子公司 | The cooling system and marine propulsion of marine propulsion |
| CN111188888A (en) * | 2020-03-17 | 2020-05-22 | 广东中兴液力传动有限公司 | Automatic liquid filling hydraulic coupler |
-
2021
- 2021-06-02 CN CN202110612834.8A patent/CN113300539B/en active Active
Patent Citations (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0721500U (en) * | 1993-09-27 | 1995-04-18 | 川崎重工業株式会社 | Pod propeller |
| CN1225608A (en) * | 1996-06-26 | 1999-08-11 | 西门子公司 | Pod-like ship propulsion system with synchronous motor |
| JP2005186748A (en) * | 2003-12-25 | 2005-07-14 | Kawasaki Heavy Ind Ltd | Pod type propeller and vessel provided with it |
| WO2013072549A1 (en) * | 2011-11-18 | 2013-05-23 | Wärtsilä Finland Oy | A method of arranging the lubrication of a steerable thruster of a marine vessel and a lubrication arrangement therefor |
| WO2013072548A1 (en) * | 2011-11-18 | 2013-05-23 | Wärtsilä Finland Oy | A method of and an arrangement for controlling the oil level in a pod of a steerable thruster of a marine vessel |
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| CN104276271A (en) * | 2013-07-09 | 2015-01-14 | Abb有限公司 | Ship's propulsion unit |
| CN104369853A (en) * | 2013-07-09 | 2015-02-25 | Abb有限公司 | Ship's propulsion unit |
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| CN105257817A (en) * | 2015-11-24 | 2016-01-20 | 綦江奔力齿轮有限公司 | Integrated reduction drive system with circulating cooling device and gas-pressure balance device |
| CN107776862A (en) * | 2016-08-31 | 2018-03-09 | 柳州市向日葵智能机械科技有限公司 | A kind of electric plating propulsion |
| CN108146605A (en) * | 2016-12-06 | 2018-06-12 | 柳州市向日葵智能机械科技有限公司 | A kind of electric plating propulsion |
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| CN111188888A (en) * | 2020-03-17 | 2020-05-22 | 广东中兴液力传动有限公司 | Automatic liquid filling hydraulic coupler |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113300539B (en) | 2023-11-28 |
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Effective date of registration: 20231028 Address after: 214200 Industrial Zone C, Guanlin Town, Yixing City, Wuxi City, Jiangsu Province Applicant after: Wuxi Xinao Electronics Co.,Ltd. Address before: 545600 first floor, No. 53, Zone D, Yuanbao community, Luzhai Town, Luzhai County, Liuzhou City, Guangxi Zhuang Autonomous Region Applicant before: Liuzhou sunflower Technology Co.,Ltd. |
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