Circulating liquid cooling device and method for hydraulic station of wind turbine generator

Abstract

The invention relates to the technical field of circulating cooling, and provides a circulating liquid cooling device and method for a wind turbine generator hydraulic station, a water outlet pipe of a liquid cooling pump is communicated with a water inlet of a first radiator, an upper diversion port of the first radiator is communicated with a water inlet of an upper diversion radiator, and the upper diversion radiator is provided with a first upper confluence port and a first lower confluence port; a lower shunting port of the first radiator is communicated with a water inlet of a lower shunting radiator; the lower shunting radiator is provided with a second upper converging port and a second lower converging port; the first upper confluence port and the second lower confluence port are both communicated with a water inlet of the first mixing radiator; the first lower confluence opening and the second upper confluence opening are both communicated with a water inlet of the second mixing radiator, and water outlets of the first mixing radiator and the second mixing radiator are both communicated with the water return pipe. According to the technical scheme, the problem that an existing radiator cannot achieve efficient cooling is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of circulating cooling, and in particular to a circulating liquid cooling device and method for a hydraulic station of a wind turbine generator set. Background Art

[0002] The circulating liquid cooling system of a large-power wind turbine is a closed-loop flow cooling system connected end to end. It uses a liquid cooling pump to drive the circulation of the coolant, achieves heat dissipation and cooling at the radiator, and then is used to dissipate heat from the components of the unit.

[0003] When heat is dissipated in the radiator, including natural heat dissipation and air-cooled direct blowing heat dissipation, the heat dissipation fins of the radiator are used for heat conduction and cooling. The volume of the radiator is relatively large, and the coolant (generally pure water) in the radiator has the following two characteristics during the cooling process: first, the internal circulation of water, relatively, hot water flows upward, cold water flows downward, and the lower water temperature is relatively low; second, during the cooling process, the water dissipates heat to the outside, and the water temperature drops in a pattern of first fast and then slow, that is, when the temperature difference is large, the cooling is fast. Therefore, during the cooling process, at the same time, the lower water temperature is relatively low, and the cooling speed continues to slow down, while the upper water temperature is relatively high, and the cooling speed can be faster. When the two are in the same radiator at the same time, efficient cooling cannot be achieved. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a circulating liquid cooling device and method for a hydraulic station of a wind turbine set in view of the above-mentioned technical deficiencies, which solves the problem that the existing radiator cannot achieve efficient cooling.

[0005] The technical solution adopted by the present invention is: to provide a circulating liquid cooling device for a hydraulic station of a wind turbine, comprising a liquid cooling pump, wherein the water inlet end of the liquid cooling pump is connected to a return pipe, and the water outlet end of the liquid cooling pump is connected to a water outlet pipe; comprising:

[0006] a first radiator, wherein the water outlet pipe is connected to a water inlet of the first radiator, the first radiator has two water outlets, and the two water outlets of the first radiator are respectively an upper diversion port connected to an upper portion of the first radiator and a lower diversion port connected to a lower portion of the first radiator;

[0007] An upper split flow radiator, wherein the upper split flow port is connected to a water inlet of the upper split flow radiator, and the upper split flow radiator has two water outlets, wherein the two water outlets of the upper split flow radiator are respectively a first upper confluence port connected to an upper portion of the upper split flow radiator and a first lower confluence port connected to a lower portion of the upper split flow radiator;

[0008] A lower flow-dividing radiator, wherein the lower flow-dividing port is connected to a water inlet of the lower flow-dividing radiator, and the lower flow-dividing radiator has two water outlets, wherein the two water outlets of the lower flow-dividing radiator are respectively a second upper confluence port connected to an upper portion of the lower flow-dividing radiator and a second lower confluence port connected to a lower portion of the lower flow-dividing radiator;

[0009] A first mixing radiator, wherein the first upper confluence port and the second lower confluence port are both in communication with a water inlet of the first mixing radiator;

[0010] The second mixing radiator, the first lower confluence port and the second upper confluence port are both communicated with the water inlet of the second mixing radiator, and the water outlets of the first mixing radiator and the second mixing radiator are both communicated with the return pipe.

[0011] Further optimization of this technical solution also includes:

[0012] An upper regulating pump, arranged on a pipeline connecting the upper flow diversion port and the water inlet of the upper flow diversion radiator, and used for pumping water to the upper flow diversion radiator;

[0013] A lower regulating pump is arranged on a pipeline connecting the lower diversion port and the water inlet of the lower diversion radiator, and is used for pumping water to the lower diversion radiator.

[0014] To further optimize the technical solution, the volume of the upper splitter radiator and the volume of the lower splitter radiator are both smaller than the volume of the first radiator.

[0015] Further optimization of this technical solution also includes:

[0016] An exhaust box is connected to the return pipe or the outlet pipe. An exhaust pipe is provided on the upper part of the exhaust box, and an exhaust valve is provided on the exhaust pipe.

[0017] Further optimization of this technical solution also includes:

[0018] There are a plurality of adsorption rods, which are vertically arranged inside the exhaust box. The plurality of adsorption rods are arranged in an array at intervals inside the exhaust box to adsorb bubbles in the coolant.

[0019] To further optimize the technical solution, the adsorption rod is arranged to vibrate along the vertical direction.

[0020] Further optimization of this technical solution also includes:

[0021] A vertical vibration component is arranged on the exhaust box and is used to drive the adsorption rod to vibrate up and down.

[0022] A circulating liquid cooling method for a hydraulic station of a wind turbine is also proposed, wherein the cooling liquid is circulated and cooled by using any of the circulating liquid cooling devices for a hydraulic station of a wind turbine described above.

[0023] The beneficial effects of the present invention are:

[0024] 1. The first radiator transports the upper hot water (with relatively high temperature) to the upper and lower diversion radiators through the upper and lower diversion ports for further cooling. The hot water and cold water (with relatively low temperature) are cooled separately. The hot water has better contact with the upper diversion radiator, the heat conduction contact area is larger, and the heat conduction cooling is faster.

[0025] 2. The first mixing radiator mixes the hot water in the upper split radiator and the cold water in the lower split radiator, and the second mixing radiator mixes the cold water in the upper split radiator and the hot water in the lower split radiator to achieve water temperature balance and meet the cooling cycle cooling requirements.

[0026] 3. Multiple and multi-stage cooling is beneficial to improve cooling efficiency. When there are active cooling components such as air cooling devices outside, energy utilization can be better allocated and energy waste can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the present invention;

[0028] Figure 2 It is a schematic diagram of the exhaust box structure of the present invention;

[0029] Figure 3 This is a schematic diagram of a spaced array distribution structure of the adsorption rods of the present invention;

[0030] Explanation of marks in the figure: 1. Liquid cooling pump; 2. Return pipe; 3. Outlet pipe; 4. First radiator; 401. Upper diversion port; 4011. Upper regulating pump; 402. Lower diversion port; 4021. Lower regulating pump; 5. Upper diversion radiator; 501. First upper confluence port; 502. First lower confluence port; 6. Lower diversion radiator; 601. Second upper confluence port; 602. Second lower confluence port; 701. First mixing radiator; 702. Second mixing radiator; 8. Exhaust box; 801. Exhaust pipe; 802. Exhaust valve; 803. Adsorption rod; 9. Vertical vibration assembly. DETAILED DESCRIPTION

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0032] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0033] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0035] like Figure 1-3 As shown, a circulating liquid cooling device for a hydraulic station of a wind turbine generator system comprises a liquid cooling pump 1, the water inlet end of the liquid cooling pump 1 is connected to a return pipe 2, and the water outlet end of the liquid cooling pump 1 is connected to a water outlet pipe 3; characterized in that it also comprises:

[0036] The first radiator 4, the water outlet pipe 3 is connected to the water inlet of the first radiator 4, the first radiator 4 has two water outlets, the two water outlets of the first radiator 4 are respectively an upper diversion port 401 connected to the upper part of the first radiator 4, and a lower diversion port 402 connected to the lower part of the first radiator 4; the upper diversion radiator 5, the upper diversion port 401 is connected to the water inlet of the upper diversion radiator 5, the upper diversion radiator 5 has two water outlets, the two water outlets of the upper diversion radiator 5 are respectively a first upper confluence port 501 connected to the upper part of the upper diversion radiator 5, and a first lower confluence port 502 connected to the lower part of the upper diversion radiator 5; the lower diversion radiator 6, the lower diversion port 402 is connected to the lower diversion radiator The water inlet of the flow radiator 6 is connected, and the lower flow radiator 6 has two water outlets, and the two water outlets of the lower flow radiator 6 are respectively a second upper confluence port 601 connected to the upper part of the lower flow radiator 6, and a second lower confluence port 602 connected to the lower part of the lower flow radiator 6; a first mixing radiator 701, the first upper confluence port 501 and the second lower confluence port 602 are both connected to the water inlet of the first mixing radiator 701; a second mixing radiator 702, the first lower confluence port 502 and the second upper confluence port 601 are both connected to the water inlet of the second mixing radiator 702, and the water outlets of the first mixing radiator 701 and the second mixing radiator 702 are both connected to the return water pipe 2.

[0037] When in use, the liquid cooling pump 1 pumps the heated coolant into the first radiator 4 through the water outlet pipe 3, and heat is dissipated and cooled in the first radiator 4. The first radiator 4 has a large volume. After the coolant is cooled, the cold water (relatively low temperature) is located at the lower part, and the hot water (relatively high temperature) is located at the upper part. Then the hot water enters the upper diversion radiator 5 from the upper diversion port 401 to continue to cool, and the cold water enters the lower diversion radiator 6 from the lower diversion port 402 to continue to cool. Then the upper bypass radiator 5 and the lower bypass radiator 6 will also form upper and lower layers according to the temperature (after two coolings, the temperatures of the upper and lower layers will gradually approach each other). The hot water in the upper part of the upper bypass radiator 5 and the cold water in the lower part of the lower bypass radiator 6 enter the first mixing radiator 701 through the first upper confluence port 501 and the second lower confluence port 602 respectively for mixing and cooling. The cold water in the lower part of the upper bypass radiator 5 and the hot water in the upper part of the lower bypass radiator 6 enter the second mixing radiator 702 through the first lower confluence port 502 and the second upper confluence port 601 for mixing and cooling. The first mixing radiator 701 and the second mixing radiator 702 each achieve temperature balance, and the internal temperatures of the two are close. Finally, the mixed and cooled coolant is discharged from the first mixing radiator 701 and the second mixing radiator 702 to the reflux pipe, which can be used to cool the unit components. The heated coolant is circulated and cooled again by the liquid cooling pump 1.

[0038] An active cooling device such as an external air cooling device can be used to act on the upper shunt radiator 5 and / or the lower shunt radiator 6 to quickly cool down according to temperature requirements. For example, if the water temperature in the upper shunt radiator 5 is relatively high, the air cooling device can be operated at high power to further increase the temperature difference and improve the cooling speed. The lower shunt radiator 6 can be cooled naturally or the air cooling device can be operated at low power to reasonably distribute energy.

[0039] The coolant can reach the use requirements after multiple graded cooling. The first radiator 4 is for initial cooling, the upper shunt radiator 5 and the lower shunt radiator 6 are for secondary cooling after cold and hot shunt, and the first mixed radiator 701 and the second mixed radiator 702 are for tertiary cooling. The first mixed radiator 701 and the second mixed radiator 702 can also only be mixed to make the temperature uniform without cooling. A stirring device or the like can be set in the first mixed radiator 701 and the second mixed radiator 702 to enhance the mixing of the coolant. The first radiator 4, the upper shunt radiator 5, the lower shunt radiator 6, the first mixed radiator 701 and the second mixed radiator 702 can all be provided with a temperature monitoring module or the like to facilitate real-time temperature feedback, and the specific heat dissipation structure can be the existing fin heat dissipation, or other heat dissipation structures of the prior art. In each radiator, the water inlet and the water outlet are arranged relatively.

[0040] Furthermore, it also includes: an upper regulating pump 4011, which is arranged on the pipeline connecting the upper diversion port 401 and the water inlet of the upper diversion radiator 5, and is used to pump water to the upper diversion radiator 5; a lower regulating pump 4021, which is arranged on the pipeline connecting the lower diversion port 402 and the water inlet of the lower diversion radiator 6, and is used to pump water to the lower diversion radiator 6.

[0041] When in use, the upper regulating pump 4011 and the lower regulating pump 4021 can actively adjust the diversion of the water outlet of the first radiator 4, and adjust the flow of the upper diversion radiator 5 and the lower diversion radiator 6 in combination with different cooling conditions, and regulate the heat dissipation time at each location, so that the coolant temperature is finally more balanced and meets the cooling requirements.

[0042] The upper regulating pump 4011 and the lower regulating pump 4021 can be used in conjunction with the temperature monitoring module and intelligently dispatched through a central controller, which can be achieved with existing technology.

[0043] The flow rate of the upper split radiator 5 and the lower split radiator 6 can also be regulated by setting a flow valve on the pipeline or the like. It can also be regulated directly by opening and closing the pipeline.

[0044] Furthermore, the volume of the upper split-flow radiator 5 and the volume of the lower split-flow radiator 6 are both smaller than the volume of the first radiator 4 .

[0045] When in use, the volumes of the upper split-flow radiator 5 and the lower split-flow radiator 6 are relatively small and their heights are relatively low, which is beneficial to reducing the upper and lower stratification of the internal coolant.

[0046] Further, it also includes: an exhaust box 8, which is connected to the return pipe 2 or connected to the outlet pipe 3, and the upper part of the exhaust box 8 has an exhaust pipe 801, and the exhaust pipe 801 is provided with an exhaust valve 802. It also includes: a plurality of adsorption rods 803, which are vertically arranged inside the exhaust box 8, and the plurality of adsorption rods 803 are arranged in an array at intervals inside the exhaust box 8 for adsorbing bubbles in the coolant.

[0047] When in use, the exhaust box 8 can be set to discharge bubbles in the coolant, which is beneficial to reduce the impact on heat conduction and the operation of the pump body. The upper part of the exhaust box 8 can be conical or truncated, and the upper part gradually shrinks. The exhaust box 8 is connected and arranged on the return pipe 2 or the outlet pipe 3. When the coolant passes through the exhaust box 8, the bubbles rise and gather, and the bubbles can be discharged through the exhaust valve 802.

[0048] The bubbles in the coolant are small and can be adsorbed by the adsorption rods 803 arranged in an array. The small bubbles gradually gather to form large bubbles, which are easy to rise and gather above the exhaust box 8. The adsorption rods 803 can be a round rod structure, and its surface can be rough to facilitate bubble attachment. Several adsorption rods 803 can be arranged in a multi-ring array in a horizontal plane. The gaps between the adsorption rods 803 can be small and staggered on the coolant flow path. The upper and lower ends of the adsorption rods 803 can be fixed on the upper and lower sides of the inner wall of the exhaust box 8 respectively; the adsorption rods 803 can also be suspended in the exhaust box 8. The adsorption rods 803 can also be a mesh structure.

[0049] Furthermore, the adsorption rod 803 is arranged to vibrate in the vertical direction.

[0050] The vertical vibration component 9 is arranged on the exhaust box 8 and is used to drive the adsorption rod 803 to vibrate up and down.

[0051] When in use, the adsorption rod 803 is set to vibrate vertically, that is, the adsorption rod 803 reciprocates and rises and falls vertically, and the vibration in the horizontal direction is reduced or eliminated. The vertical vibration is conducive to the bubbles on the adsorption rod 803 to shake up and down and accelerate the aggregation into large bubbles and move upward.

[0052] When the adsorption rod 803 is suspended in the exhaust box 8, several adsorption rods 803 can be connected as a whole and move synchronously, and the adsorption rod 803 can be driven up and down by a linear reciprocating drive mechanism; or after the adsorption rod 803 is fixed on the inner wall of the exhaust box 8, a vertical vibration component 9 is set on the outside of the exhaust box 8 to enhance the vertical vibration of the exhaust box 8, so that the internal adsorption rod 803 also has vertical shaking. Although the exhaust box 8 vibrates vertically as a whole, there is a large inertia for the bubbles and the coolant, which produces relative movement, which is conducive to the contact and aggregation of small bubbles.

[0053] The vertical vibration assembly 9 is a prior art component that vibrates in one direction up and down. Of course, a linear reciprocating drive mechanism can also be set outside the exhaust box 8 to drive the exhaust box 8. When vibrating up and down, the up and down amplitude can be small, and the frequency can be increased. When the exhaust box 8 vibrates up and down, the exhaust box 8 can be connected to the return pipe 2 or the outlet pipe 3 through a flexible pipe to meet the up and down vibration requirements.

[0054] The exhaust box 8 can be installed on the return pipe 2, located at the connection point of the first mixing radiator 701 and the second mixing radiator 702, and before the coolant in the return pipe 2 acts on the unit components to cool down, exhaust is performed to reduce the influence of bubbles on heat transmission, and the mixing rate of the coolant discharged from the first mixing radiator 701 and the second mixing radiator 702 is accelerated by up and down vibration, so that the water temperature is balanced, and the cooling effect is better when acting on the unit components.

[0055] A circulating liquid cooling method for a hydraulic station of a wind turbine is also proposed, which uses a circulating liquid cooling device to circulate the coolant and perform multiple staged cooling. The exhaust box 8 can also be used to exhaust and accelerate the mixing of the coolant. According to actual needs, multiple upper split radiators 5 and lower split radiators 6 can be set to accelerate cooling.

[0056] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A circulating liquid cooling device for a hydraulic station of a wind turbine generator system, comprising a liquid cooling pump (1), wherein the water inlet end of the liquid cooling pump (1) is connected to a return pipe (2), and the water outlet end of the liquid cooling pump (1) is connected to a water outlet pipe (3); characterized in that: Also includes: A first radiator (4), wherein the water outlet pipe (3) is connected to a water inlet of the first radiator (4), and the first radiator (4) has two water outlets, wherein the two water outlets of the first radiator (4) are respectively an upper diversion port (401) connected to an upper portion of the first radiator (4), and a lower diversion port (402) connected to a lower portion of the first radiator (4); An upper flow-dividing radiator (5), wherein the upper flow-dividing port (401) is connected to a water inlet of the upper flow-dividing radiator (5), and the upper flow-dividing radiator (5) has two water outlets, wherein the two water outlets of the upper flow-dividing radiator (5) are respectively a first upper confluence port (501) connected to an upper portion of the upper flow-dividing radiator (5), and a first lower confluence port (502) connected to a lower portion of the upper flow-dividing radiator (5); A lower flow-dividing radiator (6), wherein the lower flow-dividing port (402) is connected to a water inlet of the lower flow-dividing radiator (6), and the lower flow-dividing radiator (6) has two water outlets, wherein the two water outlets of the lower flow-dividing radiator (6) are respectively a second upper confluence port (601) connected to an upper portion of the lower flow-dividing radiator (6), and a second lower confluence port (602) connected to a lower portion of the lower flow-dividing radiator (6); A first hybrid radiator (701), wherein the first upper confluence port (501) and the second lower confluence port (602) are both in communication with a water inlet of the first hybrid radiator (701); A second hybrid radiator (702), wherein the first lower confluence port (502) and the second upper confluence port (601) are both connected to a water inlet of the second hybrid radiator (702), and the water outlets of the first hybrid radiator (701) and the second hybrid radiator (702) are both connected to the return pipe (2).

2. A circulating liquid cooling device for a hydraulic station of a wind turbine according to claim 1, characterized in that: Also includes: An upper regulating pump (4011) is arranged on a pipeline connecting the upper flow diversion port (401) and the water inlet of the upper flow diversion radiator (5), and is used to pump water to the upper flow diversion radiator (5); A lower regulating pump (4021) is arranged on a pipeline connecting the lower flow diversion port (402) and the water inlet of the lower flow diversion radiator (6), and is used to pump water to the lower flow diversion radiator (6).

3. The circulating liquid cooling device for a hydraulic station of a wind turbine according to claim 1, characterized in that: The volume of the upper split-flow radiator (5) and the volume of the lower split-flow radiator (6) are both smaller than the volume of the first radiator (4).

4. The circulating liquid cooling device for a hydraulic station of a wind turbine according to claim 1, characterized in that: Also includes: An exhaust box (8) is arranged in communication with the water return pipe (2) or the water outlet pipe (3), and an exhaust pipe (801) is provided on the upper part of the exhaust box (8), and an exhaust valve (802) is provided on the exhaust pipe (801).

5. A circulating liquid cooling device for a hydraulic station of a wind turbine according to claim 4, characterized in that: Also includes: There are a plurality of adsorption rods (803), and the adsorption rods (803) are vertically arranged inside the exhaust box (8). The plurality of adsorption rods (803) are arranged in an array at intervals inside the exhaust box (8) to adsorb bubbles in the coolant.

6. A circulating liquid cooling device for a hydraulic station of a wind turbine according to claim 5, characterized in that: The adsorption rod (803) is arranged to vibrate along the vertical direction.

7. A circulating liquid cooling device for a hydraulic station of a wind turbine according to claim 6, characterized in that: Also includes: A vertical vibration component (9) is arranged on the exhaust box (8) and is used to drive the adsorption rod (803) to vibrate up and down.

8. A circulating liquid cooling method for a hydraulic station of a wind turbine generator set, characterized in that: The cooling liquid is circulated and cooled by using the circulating liquid cooling device for the hydraulic station of a wind turbine set as described in any one of claims 1 to 7.

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