CN212084808U - Seawater cooling system with micro-pressure difference - Google Patents
Seawater cooling system with micro-pressure difference Download PDFInfo
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- CN212084808U CN212084808U CN202020618584.XU CN202020618584U CN212084808U CN 212084808 U CN212084808 U CN 212084808U CN 202020618584 U CN202020618584 U CN 202020618584U CN 212084808 U CN212084808 U CN 212084808U
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Abstract
The utility model discloses a sea water cooling system of micro-pressure differential, a sea water cooling system of micro-pressure differential includes: the seawater circulating cooling system is connected with the converter transformer cooling system through a seawater heat exchanger; the converter transformer cooling system comprises a boosting main circulating pump, a converter and a transformer; one end of the boosting main circulating pump is connected with the seawater heat exchanger, the other end of the boosting main circulating pump is respectively connected with the converter and the transformer, and the converter and the transformer are connected with the seawater heat exchanger. Through a seawater cooling system of minute-pressure difference adopt the sea water as the cold source, carry out the heat transfer to the coolant in transformer and the converter cooling system respectively through the sea water heat exchanger, be used for reducing coolant's temperature.
Description
Technical Field
The utility model relates to a power electronic technology field, concretely relates to sea water cooling system of minute-pressure difference.
Background
Offshore wind power is developed vigorously in recent years, represents an important component in the technical field of wind power, is a development direction of major wind power market focus in the world, is suitable for large-scale wind turbine generators, and the gradual increase of the capacity of a single machine can directly cause the heat dissipation capacity of each part in the generator to be greatly increased, thereby bringing higher requirements on the heat dissipation design of the generator.
In the prior art, the offshore wind-electricity external cooling system generally adopts natural air cooling or forced air cooling for heat dissipation, and the cooling efficiency is not high. In the marine environment, seawater is used as a preferred cold source, but the seawater contains a lot of impurities and has strong corrosivity, and cannot be directly used for cooling power electronic components. In order to solve the above problems, the utility model provides a seawater cooling system with micro-pressure difference.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a seawater cooling system with micro-pressure difference is provided. Through a seawater cooling system of minute-pressure difference adopt the sea water as the cold source, carry out the heat transfer to the coolant in transformer and the converter cooling system respectively through the sea water heat exchanger, be used for reducing coolant's temperature.
A micro-differential pressure seawater cooling system comprising: the seawater circulating cooling system is connected with the converter transformer cooling system through a seawater heat exchanger;
the converter transformer cooling system comprises a boosting main circulating pump, a converter and a transformer; one end of the boosting main circulating pump is connected with the seawater heat exchanger, the other end of the boosting main circulating pump is respectively connected with the converter and the transformer, and the converter and the transformer are connected with the seawater heat exchanger.
Preferably, the seawater circulation cooling system comprises a seawater filter and a seawater lift pump;
the seawater lifting pump is immersed in seawater, the output end of the seawater lifting pump is connected with a seawater filter, and the seawater filter is connected with a seawater heat exchanger. The seawater lift pump is immersed in seawater and used for pumping and conveying seawater.
Further preferably, the seawater circulating cooling system further comprises a first adjustable resistance device, wherein one end of the first adjustable resistance device is connected with the seawater filter, and the other end of the first adjustable resistance device is connected with the seawater heat exchanger. The adjustable resistance device is arranged in the circulation loop and can adjust the pressure of the system according to the setting requirement.
Preferably, the converter transformer cooling system further comprises: and one end of the filter is respectively connected with the converter and the transformer, and the other end of the filter is connected with the seawater heat exchanger.
Further preferably, the converter transformer cooling system further includes: the constant-pressure device is connected with the degassing tank, the input end of the degassing tank is connected with the boosting main circulating pump, the control end of the degassing tank is connected with the constant-pressure device, and the output end of the degassing tank is connected with the transformer and the converter respectively. The constant pressure device is filled with compressed air with stable pressure, when the pressure of the cooling system is lost, the compressed air automatically expands to press cooling medium into the circulating pipeline system so as to keep the pressure of the pipeline constant and the cooling medium full; the degassing tank is arranged at the inlet of the main circulation, is connected with the constant pressure device through a hose, can discharge gas in the cooling medium through a breather valve at the top of the constant pressure device, and sucks the gas to maintain the pressure of the system when the pressure of the system is insufficient.
Further preferably, the converter transformer cooling system further comprises a second adjustable resistance device, wherein one end of the second adjustable resistance device is connected with the filter, and the other end of the second adjustable resistance device is connected with the seawater heat exchanger. The adjustable resistance device is arranged in the circulation loop and can adjust the pressure of the system according to the setting requirement.
Preferably, a pressure sensor and a flow sensor are connected in a loop of the seawater circulation cooling system, and a pressure sensor and a flow sensor are connected in a loop of the converter transformer cooling system.
Has the advantages that: through a seawater cooling system of minute-pressure difference adopt the sea water as the cold source, carry out the heat transfer to the coolant in transformer and the converter cooling system respectively through the sea water heat exchanger, be used for reducing coolant's temperature. Specifically, the system comprises a seawater circulating cooling system, a converter and a transformer cooling system, wherein the converter and the transformer operate in parallel, a cooling medium of the converter and the transformer flows through a seawater heat exchanger after being boosted by a main circulating pump, enters a cooled part after being cooled through heat exchange to carry heat out, then returns to the main circulating pump, and is circulated in a closed reciprocating manner. The seawater circulating cooling system adopts seawater as a cold source, and exchanges heat with cooling media in the transformer and converter cooling system through the seawater heat exchanger respectively to reduce the temperature of the cooling media.
Drawings
FIG. 1 is a schematic diagram of a micro-differential pressure seawater cooling system;
the device comprises a seawater lifting pump 1, a seawater filter 2, a first adjustable resistance device 3, a seawater heat exchanger 4, a main circulating pump 5, a degassing tank 6, a converter 7, a constant pressure device 8, a filter 9, a transformer 10, a valve 11, a pressure sensor 12, a second adjustable resistance device 13 and a flow sensor 14.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
In the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
As shown in fig. 1, a micro-differential pressure seawater cooling system comprises: the seawater circulating cooling system is connected with the converter transformer cooling system through a seawater heat exchanger 4;
the converter transformer cooling system comprises a boosting main circulating pump 5, a converter 7 and a transformer 10; one end of the boosting main circulating pump 5 is connected with the seawater heat exchanger 4, the other end of the boosting main circulating pump 5 is respectively connected with the converter 7 and the transformer 10, and the converter 7 and the transformer 10 are connected with the seawater heat exchanger 4.
The main circulating pump provides power required by the closed circulating fluid and is a variable-frequency high-speed centrifugal vane pump.
In specific implementation, the seawater circulating cooling system comprises a filter 9 and a seawater lift pump 1; the seawater lifting pump 1 is immersed in seawater, the output end of the seawater lifting pump 1 is connected with a seawater filter 9, and the seawater filter 9 is connected with a seawater heat exchanger 4. The filter 9 is a mechanical filter with a built-in folding stainless steel filter element. The seawater lift pump 1 is a deep well submersible pump, is immersed in seawater, and is used for pumping and conveying seawater. The seawater circulating cooling system adopts seawater as a cold source, seawater is pumped by the seawater lifting pump, and the seawater flows into the seawater heat exchanger to respectively exchange heat with a cooling medium in the transformer converter cooling system so as to reduce the temperature of the cooling medium.
In one embodiment, the converter transformer cooling system further comprises: and one end of the seawater filter 9 is respectively connected with the converter 7 and the transformer 10, and the other end of the seawater filter 9 is connected with the seawater heat exchanger 4. The seawater filter is preferably a differential pressure type self-cleaning filter, the frequency of self-cleaning is controlled by the differential pressure, and the cleaned sewage is discharged into a sewage discharge pipe through a valve. The transformer and the converter are connected in parallel, and are mutually independent and do not interfere with each other.
In one embodiment, the seawater circulation cooling system further comprises a first adjustable resistance device 3, wherein one end of the first adjustable resistance device 3 is connected with the seawater filter 9, and the other end of the first adjustable resistance device is connected with the seawater heat exchanger 4. The converter transformer cooling system further comprises a second adjustable resistance device 13, one end of the second adjustable resistance device 13 is connected with the filter 9, and the other end of the second adjustable resistance device 13 is connected with the seawater heat exchanger 4. The adjustable resistance device is arranged in the circulation loop and can adjust the pressure of the system according to the setting requirement.
A pressure sensor 12 and a flow sensor 14 are connected in a loop of the seawater circulating cooling system, and the pressure sensor 12 and the flow sensor 14 are connected in a loop of the converter transformer cooling system. The pressure sensor uploads the real-time pressure of the system to the control system, so that operation and maintenance personnel can conveniently control the system.
When the system normally operates, the pressure of each circulating system is ensured to be stable by adjusting the adjustable pressure device through the control system. And setting the normal operation pressure of the seawater circulation cooling system to be F1, setting the normal operation pressure of the transformer converter cooling system to be F2, and transmitting the pressure to the control system through the pressure sensor. In the operation process, the pressure change of each system needs to be monitored in real time, F2 is ensured to be 10% -15% larger than F1, and when the monitored pressure value is lower than the lower limit of a set value or higher than the upper limit of a set value, the adjustable pressure device is adjusted, so that the whole system is ensured to be in a micro-positive pressure state. The flow sensor uploads the real-time flow of the system to the control system, so that operation and maintenance personnel can conveniently control the flow. The adjustable resistance devices are arranged on the circulating pipelines of the two cooling systems and used for adjusting the operating pressure of the systems and ensuring that the pressure of the converter and the transformer cooling system is higher than that of the seawater circulating cooling system, so that when the seawater heat exchanger leaks, the failure of system operation caused by the fact that seawater permeates into cooling media of the transformer and the converter cooling system can not happen immediately. The cooling mode replaces the traditional air cooling mode by using seawater cooling, so that the cooling efficiency is improved; meanwhile, the transformer and the converter are mutually independent and do not interfere with each other, when one system breaks down, the other system can still normally operate, and the reliability of the system is improved.
In one embodiment, the converter transformer cooling system further comprises: the constant-pressure device 8 is connected with the degassing tank 6, the input end of the degassing tank 6 is connected with the boosting main circulating pump 5, the control end of the degassing tank 6 is connected with the constant-pressure device 8, and the output end of the degassing tank 6 is respectively connected with the transformer 10 and the converter 7. The constant pressure device is filled with compressed air with stable pressure, when the pressure of the converter transformer cooling system is lost, the compressed air automatically expands to press cooling medium into the circulating pipeline system so as to keep the pressure of the pipeline constant and the cooling medium full, the degassing tank is arranged at the main circulation inlet and is connected with the constant pressure device through a hose, gas in the cooling medium can be discharged through a breather valve at the top of the constant pressure device, and the breather valve sucks gas to maintain the system pressure when the system pressure is insufficient.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A micro-differential pressure seawater cooling system, comprising: the seawater circulating cooling system is connected with the converter transformer cooling system through a seawater heat exchanger;
the converter transformer cooling system comprises a boosting main circulating pump, a converter and a transformer; one end of the boosting main circulating pump is connected with the seawater heat exchanger, the other end of the boosting main circulating pump is respectively connected with the converter and the transformer, and the converter and the transformer are connected with the seawater heat exchanger.
2. The micro-differential pressure seawater cooling system of claim 1, wherein the seawater circulation cooling system comprises a seawater filter and a seawater lift pump;
the seawater lifting pump is immersed in seawater, the output end of the seawater lifting pump is connected with a seawater filter, and the seawater filter is connected with a seawater heat exchanger.
3. The micro-differential-pressure seawater cooling system of claim 2, further comprising a first adjustable resistance device, wherein one end of the first adjustable resistance device is connected with the seawater filter, and the other end of the first adjustable resistance device is connected with the seawater heat exchanger.
4. The micro-differential pressure seawater cooling system of claim 1, wherein the converter transformer cooling system further comprises: and one end of the filter is respectively connected with the converter and the transformer, and the other end of the filter is connected with the seawater heat exchanger.
5. The micro-differential-pressure seawater cooling system of claim 4, wherein the converter transformer cooling system further comprises: the constant-pressure device is connected with the degassing tank, the input end of the degassing tank is connected with the boosting main circulating pump, the control end of the degassing tank is connected with the constant-pressure device, and the output end of the degassing tank is connected with the transformer and the converter respectively.
6. The micro-differential-pressure seawater cooling system of claim 4, wherein the converter transformer cooling system further comprises a second adjustable resistance device, one end of the second adjustable resistance device is connected with the filter, and the other end of the second adjustable resistance device is connected with the seawater heat exchanger.
7. The micro-differential pressure seawater cooling system of claim 1 wherein the loop of the seawater circulation cooling system is connected with a pressure sensor and a flow sensor, and the loop of the converter transformer cooling system is connected with a pressure sensor and a flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020618584.XU CN212084808U (en) | 2020-04-23 | 2020-04-23 | Seawater cooling system with micro-pressure difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020618584.XU CN212084808U (en) | 2020-04-23 | 2020-04-23 | Seawater cooling system with micro-pressure difference |
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| Publication Number | Publication Date |
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| CN212084808U true CN212084808U (en) | 2020-12-04 |
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| CN202020618584.XU Active CN212084808U (en) | 2020-04-23 | 2020-04-23 | Seawater cooling system with micro-pressure difference |
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| CN (1) | CN212084808U (en) |
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- 2020-04-23 CN CN202020618584.XU patent/CN212084808U/en active Active
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