CN113431893A - Wind power gear box oil leakage anti-pollution alarm system and method - Google Patents
Wind power gear box oil leakage anti-pollution alarm system and method Download PDFInfo
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- CN113431893A CN113431893A CN202110712958.3A CN202110712958A CN113431893A CN 113431893 A CN113431893 A CN 113431893A CN 202110712958 A CN202110712958 A CN 202110712958A CN 113431893 A CN113431893 A CN 113431893A
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- oil
- gear box
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- alarm system
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/70—Bearing or lubricating arrangements
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- 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
- F16H57/02—Gearboxes; Mounting gearing therein
-
- 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
- F16H57/045—Lubricant storage reservoirs, e.g. reservoirs in addition to a gear sump for collecting lubricant in the upper part of a gear case
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING SYSTEMS, e.g. PERSONAL CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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- 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
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02026—Connection of auxiliaries with a gear case; Mounting of auxiliaries on the gearbox
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- 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
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H2057/02039—Gearboxes for particular applications
- F16H2057/02078—Gearboxes for particular applications for wind turbines
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Details Of Gearings (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
本发明公开了一种风电齿轮箱漏油防污染报警系统及方法，该系统包括接油盘、传感器以及报警装置；其中，接油盘通过螺栓安装于齿轮箱的输入端和输出端的下端，传感器安装于接油盘的内测，传感器的另一端连接控制室的报警装置。该方法包括：齿轮箱在运转的时候，高速轴、低速轴、齿轮箱盖、齿轮箱润滑油管、箱体结合部位出现漏油，油滴滴入接油盘中。当接油盘的容量达到最大值时，传感器装置传送信号到CMS警报系统，控制室人员接受到警报以后，对风机进行停机检查。
The invention discloses an oil leakage and pollution prevention alarm system and method for a wind power gearbox. The system includes an oil receiving pan, a sensor and an alarm device; wherein, the oil receiving pan is installed on the input end and the lower end of the output end of the gearbox through bolts, and the sensor It is installed in the internal test of the oil receiving pan, and the other end of the sensor is connected to the alarm device in the control room. The method includes: when the gear box is running, the high-speed shaft, the low-speed shaft, the gear box cover, the gear box lubricating oil pipe, and the joint part of the box body leak oil, and the oil droplets drip into the oil receiving pan. When the capacity of the oil pan reaches the maximum value, the sensor device transmits a signal to the CMS alarm system. After receiving the alarm, the personnel in the control room will stop and check the fan.
Description
Technical Field
The invention belongs to the technical field of wind power generation, and particularly relates to an oil leakage anti-pollution alarm system and method for a wind power gear box.
Background
In recent years, the types and number of wind generating sets installed in wind farms have been increasing due to the vigorous development of the wind power industry. However, the problem of safe operation of the wind turbine generator is more and more, particularly the problem of oil leakage of the wind turbine generator. Lubricating oil leaks to affect the safe operation of a gear box of the wind turbine generator, and causes serious pollution to the generator, a tower and the environment, even can cause fire and the like.
The structure types of the gear boxes used by the wind turbine generator are different, but the oil leakage parts are generally the combination parts of a high-speed shaft, a low-speed shaft, a gear box cover, a gear box lubricating oil pipe and a box body of the gear box. The high-speed and low-speed shafts of the wind power gear box are generally sealed in a contact type and a non-contact type. With contact seals, the seal material needs to be soaked in lubricating oil for a long period of time and to adapt to the operating conditions of severe friction. But when wind farms are built in extreme environments, such as: in areas of high altitude and extreme temperature differentials, such sealing is typically subject to degradation and damage for two to three years. The non-contact sealing mode is a labyrinth sealing mode, the labyrinth sealing mode depends on a tiny gap between labyrinth grooves to damp leaked lubricating oil, and the pressure of the leaked lubricating oil is gradually reduced through the multistage labyrinth grooves. But after too much to cause wearing and tearing to the labyrinth groove of foreign particle in the lubricating oil, when the clearance too big can not cause the damping to the lubricating oil that leaks or outside dust gets into labyrinth groove lubricating oil and will flow out and cause the gear box to reveal. Due to poor material performance, poor sealing performance and casting defects, the oil leakage phenomenon of the gearbox cover is caused. The joint part of the lubricating oil pipe of the gear box always has an oil leakage phenomenon, and the reason for the oil leakage phenomenon is that the joint is more, but the assembly is improper, and the leakage condition is easy to occur. The box body combining part is caused by uneven bolt fastening force of the shell and warping deformation of the shell due to low processing smoothness of the combining surface of the box body.
Disclosure of Invention
The invention aims to provide an oil leakage anti-pollution alarm system and method for a wind power gear box, which can play a role in early warning, reduce pollution to a unit, a tower and the environment and improve the safety factor of the whole wind field.
The invention is realized by adopting the following technical scheme:
an anti-pollution alarm system and method for oil leakage of a wind power gear box comprise an oil receiving disc, a sensor and an alarm device;
wherein, connect the food tray to pass through the bolt and install in the lower extreme of the input of gear box and output, the sensor is installed in connecing the interior survey of food tray, the alarm device of the other end connection control room of sensor.
The invention is further improved in that the depth of the oil receiving disc is set to be 5-10 cm.
The invention is further improved in that an oil receiving tray is arranged at the lower end of the oil leakage position to collect leaked lubricating oil.
A further development of the invention is that sensor means are provided inside the oil pan, which send a signal to an alarm device when the collected lubricating oil reaches a critical value.
An anti-pollution alarm system and method for oil leakage of a wind power gear box are based on the anti-pollution alarm system and method for oil leakage of the wind power gear box, and the method comprises the following steps:
step 1: an oil receiving disc with a proper size is made according to the size of the gear box;
step 2: fixing the oil receiving disc at a corresponding position of the gear box by using a bolt;
and step 3: installing a sensor device in the oil receiving disc;
and 4, step 4: connecting the sensor to a CMS alarm system;
and 5: and setting corresponding parameters for debugging.
An anti-pollution alarming method for oil leakage of a wind power gear box comprises the following steps:
step 1: when the gear box starts to operate, oil leaks at the joint parts of the high-speed shaft, the low-speed shaft, the gear box cover, the lubricating oil pipe of the gear box and the box body, and oil drops drop into the oil receiving disc;
step 2: when the capacity of the oil receiving tank reaches the maximum value, the sensor sends a warning device to transmit a signal;
and step 3: and after the control room personnel receive the alarm, the fan is stopped and checked.
The invention is further improved in that the depth of the oil receiving disc is set to be 5-10 cm.
The invention is further improved in that an oil receiving tray is arranged at the lower end of the oil leakage position to collect leaked lubricating oil.
A further development of the invention is that sensor means are provided inside the oil pan, which send a signal to an alarm device when the collected lubricating oil reaches a critical value.
The invention has at least the following beneficial technical effects:
the invention provides an anti-pollution alarm system and an anti-pollution alarm method for oil leakage of a wind power gear box, which prevent the oil leakage of the gear box from polluting a unit, a tower and the environment and avoid the risk that a fan catches fire due to the oil leakage of the gear box.
The invention provides an oil leakage anti-pollution alarm system and method for a wind power gear box. When the capacity that connects the food tray reaches the maximum value, sensor device transmission signal to CMS alarm system, after the control room personnel received the alarm, shut down the inspection to the fan. The invention has simple principle and convenient operation, can effectively avoid the engine room and environment pollution caused by the leaked oil, and better solves the problem of the leakage of the gear box.
Drawings
FIG. 1 is a side view of an anti-pollution alarm system and method for oil leakage of a wind power gear box according to the present invention;
FIG. 2 is a front view of an anti-pollution alarm system and method for oil leakage of a wind power gear box according to the present invention;
FIG. 3 is a rear view of an anti-pollution alarm system and method for oil leakage of a wind power gear box according to the present invention;
FIG. 4 is a schematic view of an oil leakage pollution prevention alarm device for a gearbox.
Description of reference numerals:
1. a gearbox input; 2. a gearbox parallel stage; 3. an oil receiving pan; 4. a front box body; 5. a sensor.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Referring to fig. 1, 2 and 3, taking a certain fan as an example, oil receiving discs 3 with the depth of 5-10cm are respectively installed at the lower ends of the front box body 1 and the parallel stage 2 and are fixed through bolts. Referring to fig. 4, a sensor 5 is installed in the oil receiving pan 3, the sensor 5 is connected to a CMS alarm device of a control room, oil drops drop into the oil receiving pan 3 during the operation of a fan, when the oil storage amount of the oil receiving pan 3 reaches a critical value, the sensor 5 sends a signal to the CMS alarm device, when a person in the control room receives the alarm, the operation of the fan is stopped by a control system, and the upper machine checks the joint, the high-speed shaft, the low-speed end and the lubricating oil joint of the front box body of the gearbox.
The invention provides an anti-pollution alarm system and method for oil leakage of a wind power gear box, wherein the installation comprises the following five steps:
step 1: an oil receiving disc with a proper size is made according to the size of the gear box;
step 2: fixing the oil receiving disc at a corresponding position of the gear box by using a bolt;
and step 3: installing a sensor device in the oil receiving disc;
and 4, step 4: connecting the sensor to a CMS alarm system;
and 5: and setting corresponding parameters for debugging.
The invention provides an anti-pollution alarm system and method for oil leakage of a wind power gear box, wherein the working process comprises the following three steps:
step 1: when the gear box starts to operate, oil leaks at the joint parts of the high-speed shaft, the low-speed shaft, the gear box cover, the lubricating oil pipe of the gear box and the box body, and oil drops drop into the oil receiving disc;
step 2: when the capacity of the oil receiving tank reaches the maximum value, the sensor sends an alarm system to transmit signals;
and step 3: and after the control room personnel receive the alarm, the fan is stopped and checked.
Although the invention has been described in detail hereinabove with respect to a general description and specific embodiments thereof, it will be apparent to those skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (9)
1. An anti-pollution alarm system and method for oil leakage of a wind power gear box are characterized by comprising an oil receiving disc, a sensor and an alarm device;
wherein, connect the food tray to pass through the bolt and install in the lower extreme of the input of gear box and output, the sensor is installed in connecing the interior survey of food tray, the alarm device of the other end connection control room of sensor.
2. The wind power gearbox oil leakage pollution prevention alarm system and the method according to claim 1 are characterized in that the depth of an oil receiving disc is set to be 5-10 cm.
3. The wind power gearbox oil leakage pollution prevention alarm system and the method according to claim 1, wherein an oil receiving pan is placed at the lower end of an oil leakage position to collect leaked lubricating oil.
4. The wind power gearbox oil leakage pollution prevention alarm system and the method according to claim 1, wherein a sensor device is arranged inside the oil receiving disc, and when the collected lubricating oil reaches a critical value, the sensor sends a signal to the alarm device.
5. An oil leakage pollution prevention alarm system and method for a wind power gear box are characterized in that the method is based on the oil leakage pollution prevention alarm system and method for the wind power gear box as claimed in any one of claims 1 to 4, and the method comprises the following steps:
step 1: an oil receiving disc with a proper size is made according to the size of the gear box;
step 2: fixing the oil receiving disc at a corresponding position of the gear box by using a bolt;
and step 3: installing a sensor device in the oil receiving disc;
and 4, step 4: connecting the sensor to a CMS alarm system;
and 5: and setting corresponding parameters for debugging.
6. An anti-pollution alarm system and method for oil leakage of a wind power gear box are characterized by comprising the following steps:
step 1: when the gear box starts to operate, oil leaks at the joint parts of the high-speed shaft, the low-speed shaft, the gear box cover, the lubricating oil pipe of the gear box and the box body, and oil drops drop into the oil receiving disc;
step 2: when the capacity of the oil receiving tank reaches the maximum value, the sensor sends a warning device to transmit a signal;
and step 3: and after the control room personnel receive the alarm, the fan is stopped and checked.
7. The wind power gearbox oil leakage pollution prevention alarm system and the method according to claim 6 are characterized in that the depth of the oil receiving disc is set to be 5-10 cm.
8. The wind power gearbox oil leakage pollution prevention alarm system and the method according to claim 6, wherein an oil receiving pan is placed at the lower end of an oil leakage position to collect leaked lubricating oil.
9. The wind power gearbox oil leakage pollution prevention alarm system and the method according to claim 6, wherein a sensor device is arranged inside the oil receiving disc, and when the collected lubricating oil reaches a critical value, the sensor sends a signal to the alarm device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110712958.3A CN113431893A (en) | 2021-06-25 | 2021-06-25 | Wind power gear box oil leakage anti-pollution alarm system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110712958.3A CN113431893A (en) | 2021-06-25 | 2021-06-25 | Wind power gear box oil leakage anti-pollution alarm system and method |
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| Publication Number | Publication Date |
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| CN113431893A true CN113431893A (en) | 2021-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110712958.3A Pending CN113431893A (en) | 2021-06-25 | 2021-06-25 | Wind power gear box oil leakage anti-pollution alarm system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959720A (en) * | 2021-09-30 | 2022-01-21 | 东风商用车有限公司 | Vehicle engine fuel supply test system and vehicle engine fuel supply test monitoring method |
| CN114719012A (en) * | 2022-04-19 | 2022-07-08 | 国家能源集团新能源有限责任公司 | Leakage protection device for gear box |
| CN115685863A (en) * | 2022-10-26 | 2023-02-03 | 张家口卷烟厂有限责任公司 | Oil-stain-smoke early warning feedback method, device and system |
| CN116378910A (en) * | 2023-03-24 | 2023-07-04 | 华能广西清洁能源有限公司 | A wind turbine gearbox real-time monitoring and fault diagnosis system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201254286Y (en) * | 2008-07-04 | 2009-06-10 | 王金生 | Environment-friendly type marine vehicle driving system |
| KR20100115502A (en) * | 2009-04-20 | 2010-10-28 | 동화프라임 주식회사 | System for monitoring oil leakage of lubricator |
| CN201687669U (en) * | 2010-06-02 | 2010-12-29 | 华锐风电科技(集团)股份有限公司 | Oil leakage collection device for wind power generating set |
| WO2019219293A1 (en) * | 2018-05-16 | 2019-11-21 | Denios Ag | Leakage warning system |
-
2021
- 2021-06-25 CN CN202110712958.3A patent/CN113431893A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201254286Y (en) * | 2008-07-04 | 2009-06-10 | 王金生 | Environment-friendly type marine vehicle driving system |
| KR20100115502A (en) * | 2009-04-20 | 2010-10-28 | 동화프라임 주식회사 | System for monitoring oil leakage of lubricator |
| CN201687669U (en) * | 2010-06-02 | 2010-12-29 | 华锐风电科技(集团)股份有限公司 | Oil leakage collection device for wind power generating set |
| WO2019219293A1 (en) * | 2018-05-16 | 2019-11-21 | Denios Ag | Leakage warning system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113959720A (en) * | 2021-09-30 | 2022-01-21 | 东风商用车有限公司 | Vehicle engine fuel supply test system and vehicle engine fuel supply test monitoring method |
| CN114719012A (en) * | 2022-04-19 | 2022-07-08 | 国家能源集团新能源有限责任公司 | Leakage protection device for gear box |
| CN115685863A (en) * | 2022-10-26 | 2023-02-03 | 张家口卷烟厂有限责任公司 | Oil-stain-smoke early warning feedback method, device and system |
| CN116378910A (en) * | 2023-03-24 | 2023-07-04 | 华能广西清洁能源有限公司 | A wind turbine gearbox real-time monitoring and fault diagnosis system |
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Application publication date: 20210924 |