CN110925407A - Heat dissipation device for gear box lubricating system - Google Patents
Heat dissipation device for gear box lubricating system Download PDFInfo
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- CN110925407A CN110925407A CN202010034676.8A CN202010034676A CN110925407A CN 110925407 A CN110925407 A CN 110925407A CN 202010034676 A CN202010034676 A CN 202010034676A CN 110925407 A CN110925407 A CN 110925407A
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- oil
- oil tank
- gear box
- tank
- fan
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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
- F16H57/0412—Cooling or heating; Control of temperature
- F16H57/0415—Air cooling or ventilation; Heat exchangers; Thermal insulations
- F16H57/0416—Air cooling or ventilation
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Abstract
The invention relates to the technical field of wind power generation. The heat dissipation device for the gear box lubricating system comprises an oil tank, a radiator, an air inlet and an air outlet, and is characterized in that the oil level of the oil tank is the same as that of the gear box, an oil discharge port A arranged at the bottom of the oil tank is connected with an oil discharge port B of the gear box through an oil discharge hose, a plurality of heat conduction pipes are arranged on the top of the oil tank in a vertical matrix mode, the lower portions of the heat conduction pipes are inserted into oil in the oil tank, the upper portions of the matrix heat conduction pipes are connected through a plurality of layers of horizontally arranged cooling fins. The beneficial effects are as follows: the problem of power limitation of the wind driven generator is solved, and the service life of the working valve is prolonged; all installation sizes are kept consistent with the original sizes; the temperature of the cabin is reduced, and the normal work of components inside the cabin is maintained.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to a heat dissipation device for a lubricating system of a gear box.
Background
In recent years, the wind power industry is rapidly developed, and China has become the market with the largest and fastest growth of the global wind power generation scale. Along with the rapid increase of the installed capacity of wind power and the increase of the service life of a fan in China, the problem of the limited power of the fan caused by the fact that the oil temperature of a gearbox is too high frequently occurs to a double-fed fan, the phenomenon is particularly obvious when a unit which runs for more than three years, and as a result, the fan cannot be fully used at high-quality wind speed, and resources are seriously wasted. To solve this problem, many technical improvements are made, which mainly include: the system comprises cabin external ventilation, parallel air cooling machines, serial air cooling machines, electric three-way valves, pipeline transformation, electric transformation and the like. In fact, the problem of high oil temperature of a gearbox lubricating system is an expression, and the reason for the high oil temperature is not an individual reason of a certain part or part, but an interaction result among parts and factors in the system, so that matching of parameters (such as flow, pressure and the like) among key parts in the system is comprehensively analyzed in the aspect of the system, and then technical transformation is performed in a targeted manner.
The fan is in different operating conditions, and lubricating system ubiquitous has following problem:
(1) failure of a thermostatic valve of a lubrication system
The temperature control valve used in the existing lubricating system overcomes the resistance of a spring by means of the expansion with heat and contraction with cold of paraffin in the temperature control valve, and pushes a valve core to move relative to a valve body to realize the flow control of oil in a gear. After the gear box runs to a certain degree, a certain amount of wear particles appear in gear oil due to the wear of gears and bearings, and the wear particles can be clamped in a gap between a valve core and a valve body of the temperature control valve, so that the relative motion between the valve core and the valve body is blocked, paraffin can not expand and contract freely due to the fact that the paraffin bears extra load, paraffin material fatigue is caused in the long term, and finally the temperature control valve fails. Meanwhile, the thermal expansion and contraction performance of the paraffin is continuously reduced along with the increase of the action times, and the paraffin basically does not have the expansion capability after reaching a certain number of times. Therefore, the thermostatic valve fails as other elements, and fails in the morning or in the evening, but the uncontrollable failure can cause the unit to be shut down accidentally, so that the operation and maintenance preparation is insufficient, and the power generation loss is serious.
(2) The safety valve of the lubricating system is stuck
As shown in figure 1, a 10bar safety valve ensures that part of the medium returns to a gear box through a bypass when the system is started at a low temperature (the viscosity of the medium is high, and the pressure of the system is high), so that the pressure of a circulation loop is reduced. Because the valve is arranged at the front end of the filter, the valve core is easy to be blocked by dirt such as accumulated scrap iron and the like, and the valve always has leakage. The power limit phenomenon of the system can occur at high temperature.
Both of the above phenomena are caused by unclean lubricating oil and dirt such as metal chips in the oil.
(3) Insufficient heat dissipation capacity of cooling system
The medium temperature is reduced by the heat exchange between wind and oil. The cooling system has the biggest problems of low oil quantity, insufficient heat dissipation strength and limited power of the lubricating system when the oil temperature is high.
With the arrival of wind power on-line at a low price, the existing widely-existing problem of wind abandoning and electricity limiting is obviously improved, a new opportunity is brought to the updating and development of the wind power generation technology, and the important goal pursued by the wind power plant is to fully utilize high-quality wind resources and improve the availability of the wind power plant, so that the problem of limiting the power of a fan caused by high oil temperature of a gear box is particularly urgent to solve. From the perspective of reliability and economic benefits, the method has extremely important significance for fault research and technical improvement of high oil temperature of a lubricating system of a gearbox of a wind turbine generator.
Disclosure of Invention
The invention aims to mainly improve oil quality, strengthen cooling strength and solve the problem of fan power limit caused by high oil temperature of a gear box on the basis of not changing original equipment, and the aim is realized by the following technical scheme: the invention provides a heat dissipation device of a gear box lubricating system, which is used in parallel with original equipment on the basis of not changing the original equipment. Its oil level of oil tank and gear box oil level height the same, the oil drain first that the oil tank bottom set up links to each other with oil pipe for the oil drain second of gear box, the perpendicular matrix mode in oil tank top sets up many heat pipes, during the oil in the oil tank is inserted to the lower part of heat pipe, the fin that the upper portion of matrix heat pipe was arranged by the multilayer level is connected, one side of matrix heat pipe is equipped with the fan, the air intake first of fan covers the air intake second of seting up through canvas hose first and aerogenerator cabin and links to each other, the air outlet second of seting up on the air outlet first of fan covers through canvas hose second and aerogenerator cabin links to each other.
Oil tank bottom 100mm to 200mm lower than the bottom of gear box, be equipped with in the middle of the oil tank bottom and hinder the oiled-plate, divide into two parts with the oil tank bottom, sedimentation tank and sedimentation tank promptly, the oil-out setting of oil tank is at the middle part in sedimentation tank to link to each other with the gear box oil-out of gear box, the oil return opening of oil tank sets up the middle part at the sedimentation tank, and link to each other with the gear box high pressure oil return opening of gear box, respectively be equipped with strong magnet in sedimentation tank and sedimentation tank's bottom, rub the metal fillings that get off when adsorbing the gear engagement transmission.
The wind power generator is characterized in that an air outlet A of the fan is connected with an air outlet B which is formed in a cabin cover of the wind power generator through a canvas hose B, a blind window is arranged on the cabin cover on the outer side of the air outlet B, a wind plate for converting wind direction is arranged on the inner side of the air outlet B and is fixedly connected with a wind plate motor shaft, and an air filter screen is arranged on the cabin cover of the air inlet A of the fan.
The heat conducting pipe is a closed cavity, the interior of the heat conducting pipe is in a vacuum state, the interior of the heat conducting pipe is filled with partially volatile liquid, a layer of mesh is laid on the inner pipe wall, the lower end of the heat conducting pipe is inserted into oil, and the upper end of the heat conducting pipe is arranged in an air channel outside the oil tank and at the front end of the fan.
The beneficial effects are as follows:
(1) the problem of the limit power of the wind driven generator is solved, and the service life of the working valve is prolonged.
The invention can dissipate the heat in the lubricating oil of the gear box, improve the self heat dissipation capability and the anti-blocking property, settle the lubricating oil, adsorb metal chips, ensure the normal operation of all working valves and prolong the service life.
(2) All mounting dimensions remain the same as the original dimensions.
The whole installation size is not obviously changed, and an oil discharge hose is additionally arranged on the oil way, so that the lubricating oil of the gear box is settled and adsorbed.
(3) The temperature of the cabin is reduced, and the normal work of components inside the cabin is maintained.
Because the fan sucks air outside the cabin, the exhausted air is converted according to the temperature in the cabin, and proper temperature is provided for all components working in the cabin, so that the protection effect is achieved.
Drawings
FIG. 1 is a schematic diagram of a temperature control device of a prior art gearbox lubrication system;
FIG. 2 is a schematic view of the present invention in connection with a temperature control device of a conventional gearbox lubrication system;
FIG. 3 is a front view of the present invention;
FIG. 4 is a schematic view of the installation of the present invention;
fig. 5 is an enlarged view of the heat transfer pipe.
As can be seen from the figure: a filtering system 1, an oil pump motor 101, an oil pump 102, a 10bar safety valve 103, a 10 μm fine filter 104, a 3bar one-way valve 105, a 50 μm coarse filter 106, a pressure relay 107 and a temperature control valve 108,
a gear box 3, a gear box oil return opening 301, a gear box oil pointer 302, a gear box oil outlet 303, a gear box high-pressure oil return opening 304 and an oil discharge opening B305,
the heat radiator 4, an air inlet B401, a canvas hose A402, a fan 403, a heat conducting pipe 404, a radiating fin 405, a canvas hose B406, an air outlet B407, a shutter 408, an oil outlet 409, an oil return port 410, an oil return pipe 411, a strong magnet 412, an oil baffle 413, an oil outlet A414, a radiating fin 415, an air plate motor 416, an air plate 417, an oil tank 418, a radiator 419, an air inlet A420, an air outlet A421, liquid 422 and a mesh 423,
an oil discharge hose 5.
Detailed Description
The working principle of the prior art scheme is as follows: as shown in fig. 1, the lubricating oil in the oil sump of the gearbox 3 drives an oil pump 102 to perform system lubrication through an oil pump motor 101. When the oil temperature is lower and the oil pressure is more than 10bar, the 10bar safety valve 103 is opened, and the gear oil directly flows back to the oil pool of the gear box through the high-pressure oil return port 304 of the gear box so as to accelerate the temperature rise;
when the oil temperature rises, the viscosity drops, the oil pressure drops, and when the oil pressure is 3-10 bar, a 3bar one-way valve 105 on a filter element is opened, a 10um fine filter 104 is bypassed, and only a 50um coarse filter 106 is passed, and before the oil temperature rises to 55 ℃ or after the oil temperature drops to 50 ℃, a temperature control valve 108 is opened, an oil cooling system is bypassed, and gear oil directly returns to an oil pool through a gear box oil return port 301 through the temperature control valve 108; the pressure relay 107 is opened to bypass when the fine 10 μm filter 104 and the coarse 50 μm filter 106 are clogged.
When the oil pressure is lower than 3bar, the 3bar check valve 105 on the filter element is closed, the gear oil is subjected to secondary filtration of 10um and 50um, before the oil temperature rises to 55 ℃ or after the oil temperature drops to 50 ℃, the temperature control valve 108 is opened, the bypass cooling system 2 is adopted, and the gear oil directly returns to the oil pool through the temperature control valve 108.
Before the oil temperature rises to 55 ℃ or falls to 50 ℃, the temperature control valve 108 is closed, and the gear oil returns to the oil pool of the gear box 3 after passing through the cooler 203 and the cooling motor 201 of the cooling system 2 to drive the cooling fan 202 to cool.
The general concept of the invention is: under the condition of not changing the temperature control device and the control principle of the original wind driven generator gear box lubricating system, the heat dissipation device of the gear box lubricating system is additionally arranged, so that the purposes of improving and settling oil, adsorbing metal chips and improving the heat dissipation strength are achieved, and further the problem of power limitation is solved.
In a first embodiment, as shown in fig. 2, 3 and 4, a heat sink 4 for a gearbox lubrication system includes an oil tank 418, a radiator 419, an air inlet 420 and an air outlet 421. The oil level of the oil tank 418 is the same as the oil level of the gear box 3, the bottom of the oil tank 418 is provided with an oil discharge port A414, the oil discharge port A414 is connected with an oil discharge port B305 of the gear box 3 by an oil pipe, the top of the oil tank 418 is provided with a plurality of heat conduction pipes 404 in a vertical matrix mode, the lower parts of the heat conduction pipes 404 are inserted into the oil in the oil tank, the upper parts of the matrix heat conduction pipes 404 are connected by a plurality of layers of horizontally arranged radiating fins 415, one side of the matrix heat conduction pipes 404 is provided with a fan 403, an air inlet A420 of the fan 403 is connected with an air inlet B401 arranged on a cabin cover of the wind driven generator through a canvas hose A402, an air outlet A421 of the,
a second embodiment, as shown in fig. 2 and 3, based on the first embodiment, the bottom of the oil tank 418 is 100mm to 200mm lower than the bottom of the gear box 3, an oil baffle 413 is arranged in the middle of the bottom of the oil tank 418, the bottom of the oil tank 418 is divided into two parts, namely a sedimentation tank and a sedimentation tank, an oil outlet 409 of the oil tank 418 is arranged in the middle of the sedimentation tank, an oil return port 410 of the oil tank 418 is arranged in the middle of the sedimentation tank, and strong magnets 412 are respectively arranged at the bottoms of the sedimentation tank and the sedimentation tank to adsorb metal chips rubbed off during gear meshing transmission;
a third embodiment, as shown in fig. 4, based on the first embodiment, the air outlet a 421 of the fan 403 is connected to an air outlet b 407 formed on the nacelle cover of the wind turbine through a canvas hose b 406, a louver 408 is disposed on the nacelle cover outside the air outlet b 407, the louver 408 closes the air outlet b 407 when the fan 403 does not work, a wind plate 417 for converting the wind direction is disposed inside the air outlet b 407 and controlled by a wind plate motor 416, when the ambient temperature is low, the wind plate 417 blocks the air outlet b 407 formed on the nacelle cover, the hot air circulates in the nacelle to increase the temperature in the nacelle, when the ambient temperature is high, the wind plate 417 turns downward, as shown in fig. 4, the wind port on the canvas hose b 406 is blocked, and the hot air is blown out of the nacelle; an air filter screen is arranged on the cabin cover of the air inlet armor 420 of the fan 403, the fan 403 can rotate forward and backward, and shields such as poplar catkins and willow catkins on the air filter screen can be blown off when the fan 403 rotates backward.
In a fourth embodiment, as shown in fig. 5, based on the first embodiment, the heat pipe 404 is a closed cavity, the interior of the heat pipe is in a vacuum state, the interior of the heat pipe is filled with a portion of volatile liquid 422, a layer of mesh 423 is laid on the inner pipe wall, the lower end of the heat pipe 404 is inserted into oil, the upper end of the heat pipe is in an air duct outside the oil tank 418 and at the front end of the fan 403, the portion of volatile liquid 422 filled in the heat pipe 404 is heated and volatilized under the action of oil temperature, carries heat upwards, flows back to the lower end of the heat pipe 404 downwards along the inner pipe wall with the layer of mesh 423 laid on the inner pipe wall after being cooled by the fan 403, and cools the heat in the lubricating oil, wherein the cooling strength.
Description of the drawings: the power limiting data shows that when the wind speed exceeds 12m/s and the oil temperature of the gearbox reaches 76.7 ℃, the effective power generation power is 384.2kW, the rated power is 1500kW, and the power limiting phenomenon is serious. This phenomenon is very high in proportion to all wind farms.
Claims (4)
1. The utility model provides a gear box lubricating system heat abstractor, includes oil tank (418), radiator (419), air intake (420), air outlet (421), characterized in that, its oil level of oil tank (418) and gear box (3) oil level height the same, oil drain first (414) that oil drain that oil tank (418) bottom set up links to each other with oil drain second (305) of gear box (3) with oil discharge hose (5), set up many heat pipes (404) at oil tank (418) top perpendicular matrix mode, during the oil in the lower part of heat pipe (404) inserted the oil tank, the upper portion of matrix heat pipe (404) is connected by multilayer horizontally arranged fin (415), one side of matrix heat pipe (404) is equipped with fan (403), air intake first (420) of fan (403) are linked to each other through canvas hose first (402) and wind power generator cabin cover air intake second (401) of seting up, air outlet first (421) of fan (403) cover wind power generator cabin through canvas hose second (406) and wind power generator cabin cover The air outlets B (407) are arranged and connected.
2. The heat sink device for the lubrication system of the gearbox as recited in claim 1, wherein the bottom of the oil tank (418) is 100mm to 200mm lower than the bottom of the gearbox (3), an oil baffle (413) is arranged in the middle of the bottom of the oil tank (418) to divide the bottom of the oil tank (418) into two parts, namely a sedimentation tank and a sedimentation tank, an oil outlet (409) of the oil tank (418) is arranged in the middle of the sedimentation tank and connected with a gearbox oil outlet (303) of the gearbox (3), an oil return port (410) of the oil tank (418) is arranged in the middle of the sedimentation tank and connected with a gearbox high-pressure oil return port (304) of the gearbox (3), and strong magnets (412) are respectively arranged at the bottoms of the sedimentation tank and the sedimentation tank to adsorb metal chips rubbed down when the gears are meshed for transmission.
3. The heat dissipation device for the lubrication system of the gearbox as claimed in claim 1, wherein an air outlet A (421) of the fan (403) is connected with an air outlet B (407) formed in a cabin cover of the wind driven generator through a canvas hose B (406), a louver (408) is arranged on the cabin cover outside the air outlet B (407), a wind plate (417) for converting wind direction is arranged inside the air outlet B (407) and is fixedly connected with a shaft of a wind plate motor (416), and an air filter screen is arranged on the cabin cover of the air inlet A (420) of the fan (403).
4. The heat sink for the lubrication system of the gearbox as recited in claim 1, wherein said heat pipe (404) is a closed cavity, the interior of the cavity is vacuum, the interior of the cavity is filled with a volatile liquid (422), a layer of mesh (423) is laid on the inner wall of the cavity, the lower end of the heat pipe (404) is inserted into the oil, and the upper end of the heat pipe is located outside the oil tank (418) and in the air channel at the front end of the fan (403).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010034676.8A CN110925407A (en) | 2020-01-14 | 2020-01-14 | Heat dissipation device for gear box lubricating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010034676.8A CN110925407A (en) | 2020-01-14 | 2020-01-14 | Heat dissipation device for gear box lubricating system |
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| CN110925407A true CN110925407A (en) | 2020-03-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010034676.8A Pending CN110925407A (en) | 2020-01-14 | 2020-01-14 | Heat dissipation device for gear box lubricating system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196982A (en) * | 2020-09-30 | 2021-01-08 | 安徽维嵩生产力促进有限公司 | Negative pressure cooling mechanism of new energy automobile gearbox |
| CN116592129A (en) * | 2023-07-17 | 2023-08-15 | 德力佳传动科技(江苏)股份有限公司 | Efficient heat dissipation structure of wind power gear box |
-
2020
- 2020-01-14 CN CN202010034676.8A patent/CN110925407A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112196982A (en) * | 2020-09-30 | 2021-01-08 | 安徽维嵩生产力促进有限公司 | Negative pressure cooling mechanism of new energy automobile gearbox |
| CN116592129A (en) * | 2023-07-17 | 2023-08-15 | 德力佳传动科技(江苏)股份有限公司 | Efficient heat dissipation structure of wind power gear box |
| CN116592129B (en) * | 2023-07-17 | 2023-10-20 | 德力佳传动科技(江苏)股份有限公司 | Efficient heat dissipation structure of wind power gear box |
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