CN212367060U - Large-scale circulating pump motor ventilation cooling system - Google Patents
Large-scale circulating pump motor ventilation cooling system Download PDFInfo
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- CN212367060U CN212367060U CN202020668645.3U CN202020668645U CN212367060U CN 212367060 U CN212367060 U CN 212367060U CN 202020668645 U CN202020668645 U CN 202020668645U CN 212367060 U CN212367060 U CN 212367060U
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- pump motor
- circulating pump
- motor
- coil
- air inlet
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- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 238000009423 ventilation Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 238000009413 insulation Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000008859 change Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 14
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- 238000010292 electrical insulation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010754 BS 2869 Class F Substances 0.000 description 1
- 230000035508 accumulation Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Motor Or Generator Cooling System (AREA)
Abstract
The utility model belongs to the power equipment field, in particular to large-scale circulating pump motor ventilation cooling system, including circulating pump motor and the water cooling device of circulating pump motor from the area, water cooling device and circulating pump motor coil, stator rotor place space intercommunication, bottom end is equipped with the air inlet at the bottom of the circulating pump motor, air inlet and circulating pump motor coil, stator rotor place space intercommunication, the air inlet is connected with cold air fan through the tuber pipe, circulating pump motor top is equipped with a plurality of steam discharge holes, steam discharge hole and circulating pump motor coil, stator rotor place space intercommunication. The utility model discloses, need not to change under the prerequisite of original unit, extravagant plenty of time, manpower and materials, reform transform original unit, save the cost, the radiating effect is good, with original water cooling joint work, has avoided motor insulation part to melt, takes place the existing appearance of stator, coil ground connection accident, the good reliability.
Description
Technical Field
The utility model belongs to the power equipment field, in particular to large-scale circulating pump motor ventilation cooling system.
Background
At present, in the production process of multiple power plants, the fact that some circulating water pump motors are called as circulating pump motors for short is found that the circulating water pump motors are frequently used, the coil temperature is high, and after a period of operation, the motor insulation parts are found to be gradually deteriorated, the grounding accidents of a stator and a coil occur, and the machine halt is caused. The main reasons for this current situation are as follows:
1. during design, the phenomenon of small horse drawing and large vehicle occurs in the operation process due to small model selection power;
2. if the pump motor is positioned in a pit of a water pump room at the river side, the motor discharges high-heat gas to surround the motor, so that the temperature of the motor body and the temperature difference of an external ring are reduced, and the quick heat dissipation of the motor body to the surrounding natural air is prevented;
3. at present, a water cooling device is additionally arranged on a circulating pump motor, but the design and the type selection of the motor are insufficient to consider the regional climate conditions during the design, the unit is often in a full load or overload state, the temperature of a motor coil can rise linearly, the temperature is too high, and the damage to the insulation of the motor is very huge.
For the above reasons, when the power of the motor is selected to be small, if the pump motor is replaced, a lot of time and manpower physical force are needed, the cost is high, and the normal operation of the power plant is affected, so that a novel ventilation and heat dissipation system is needed to be developed under the condition that the original unit is not changed, so as to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to overcome above technical problem, provide a large-scale circulating pump motor ventilation cooling system measure.
The utility model provides a large-scale pump motor ventilation cooling system, includes the water cooling plant of pump motor and pump motor from the area, water cooling plant and pump motor coil, stator rotor place space intercommunication, pump motor bottom is equipped with a plurality of air inlets, air inlet and pump motor coil, stator rotor place space intercommunication, the air inlet is connected with cold air blower through the tuber pipe, pump motor top is equipped with a plurality of steam discharge holes, steam discharge hole and pump motor coil, stator rotor place space intercommunication.
Further, the hot gas discharge hole comprises a hollow cylinder, a fixing plate is arranged at the bottom of the hollow cylinder, and a hemispherical shield is connected to the top of the hollow cylinder 501.
Furthermore, a filter screen is arranged on the air pipe between the cold air fan and the air inlet.
Further, the number of the air inlets is at least 2, and the number of the hot air discharge holes is at least 4.
Further, the cold air fan is an axial flow fan.
The utility model discloses following beneficial effect has: the utility model can transform the original machine set without replacing the original machine set and wasting a large amount of time, manpower and material resources, thereby saving the cost and avoiding the problem of stopping the machine to inform the production; carry cold air in to the pump motor through axial fan and tuber pipe, the circulating air current of recycling motor rotor rotation formation passes through the motor with the outer cold air and decides, the clearance between the rotor, takes away motor coil and stator core and produces a large amount of heats, lets most hot-air outside through the steam exhaust hole discharge that the top set up, and the radiating effect is good, and with original water-cooling common work, avoided motor insulating part to melt, the emergence stator, the existing appearance of coil ground fault, the good reliability.
Drawings
Fig. 1 is a schematic view of a ventilation and heat dissipation system of a large-scale pump motor according to the present invention;
fig. 2 is a schematic view of a hot air discharge hole of a large-scale pump motor ventilation and heat dissipation system of the present invention;
FIG. 3 is a flow chart of cooling of the existing unit;
FIG. 4 is a flow diagram of post-retrofit unit cooling.
As shown in the figure: 1. a pump motor; 2. a water cooling device; 3. an air inlet; 4. a cold air blower; 5. a hot gas discharge hole; 6. a filter screen; 501. A hollow cylinder; 502. a fixing plate; 503. and (5) semi-spherical shielding.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The specific implementation mode of the utility model is that, a large-scale circulating pump motor ventilation cooling system, including circulating pump motor 1 and the water cooling device 2 of circulating pump motor 1, water cooling device 2 and circulating pump motor 1 coil, stator and rotor place the space intercommunication, circulating pump motor 1 bottom is equipped with a plurality of air inlets 3, air inlets 3 and circulating pump motor 1 coil, stator and rotor place the space intercommunication, each air inlet 3 is connected with cold air blower 4 through the tuber pipe, circulating pump motor 1 top is equipped with a plurality of hot gas discharge holes 5, hot gas discharge holes 5 and circulating pump motor 1 coil, stator and rotor place the space intercommunication, discharge holes 5 include hollow cylinder 501, the bottom of hollow cylinder 501 is equipped with fixed plate 502, the top of hollow cylinder 501 is connected with hemisphere shelter 503, filter screen 6 on the tuber pipe between cold air blower 4 and air inlet 3, the number of the air inlets 3 is at least 2, the number of the hot air discharge holes 5 is at least 4, and the cold air fan 4 adopts an axial flow fan.
The specific modification embodiment is as follows:
the problem that a certain power plant of Wuhan exists before reforming transform: the 6KV motor YLKS1120-16 of the third-stage circulating water pump of the power plant has the lower 3000KW power due to the model selection of equipment, the temperature of a coil in operation is high and can reach 140 ℃ at most, 4 motors are used, the insulation of the motor is gradually deteriorated from the production operation to the present in 2006, branch leads at the end part of the circulating water pump motor and end coils are burnt out due to overheating, stator coil grounding accidents occur for many times in the operation, and the main reasons of the current situation are as follows:
1. the model selection power of the motor is smaller.
According to the pump body shaft power 2700KW, the mechanical efficiency 0.87 and the motor efficiency 0.95, the selected motor power is 2700/(0.87 0.95) approximately equal to 3343 KW, and the current motor power is 3000KW, so that the phenomenon of 'small horse drawing cart' occurs in normal operation.
2. The pump motor is located the water pump room pit of the river limit, and the motor exhaust high hot gas surrounds around the motor, lets motor body temperature and external ring difference in temperature reduce, prevents the quick heat dissipation of motor body to surrounding natural air.
3. The design and the selection of the circulating pump motor are not sufficient to consider regional climate conditions, Wuhan is one of the famous cities of 'three big furnaces' in China, the load of a unit is high in hot summer, the demand for cooling water is large, and the water head pressure at the outlet of the circulating pump motor is high, so that the motor is frequently operated in a full load or overload state. If the motor runs under the condition of over-rated current 368A, the temperature of the motor coil is directly approximate to the insulation limit temperature of class F of 155 ℃. The damage to the motor insulation is very great. Particularly, the branch lead at the end part of the coil adopts a cross-linked polyethylene single-core cable, the running temperature of the cable is only 90 ℃, and according to the rule of 8 ℃ of electrical insulation, if the temperature of electrical equipment exceeds 8 ℃, the service life of the electrical insulation is shortened by half.
The water cooling mode of the circulating pump unit is IC81W cooling mode before modification, wherein
IC-identification of cooling mode;
cooling medium circuit arrangement code, meaning: the primary cooling medium circulates in the closed loop and transfers heat to a remote medium through an external cooler arranged on the motor;
1-is a driving mode of self-circulating cooling medium; the cooling medium drive is related to the motor speed;
w-cooling medium code, W indicates that the cooling medium is water;
the specific manner of driving the internal circulation cooling medium is shown in fig. 3.
Adopt the utility model discloses the measure is reformed transform original circulating pump motor cooling, does not change former circulating pump motor cooling method, impresses relatively colder natural air through 2 1.5 KW's axial fan from the motor outside, and increase coolant's tolerance opens 4 observation closure plates in motor top simultaneously, makes into and both can exhaust, the steam exhaust hole that again can grease proofing and foreign matter invasion, gets rid of the hot gas medium of a large amount of stagnated accumulations in motor top, reaches the purpose of cooling down rapidly for the motor.
The cooling mode of the motor of the circulating pump after being transformed is shown in figure 4: the IC81W cooling mode that the original closed primary cooling medium air of the motor and the secondary cooling medium water exchange heat is improved into partial open type cooling, and a large amount of hot air generated after the primary cooling medium exchanges heat is not subjected to secondary heat exchange and is directly discharged outside the machine. The self-circulation cooling medium pushing mode generated along with the rotation speed of the rotor in the original motor is changed into the mode of strong supplement of the external cooling medium, and the hot air after the heat exchange of the internal primary cooling medium naturally leaks.
The improved 4 circulating water pump motors meet the cooling air forced circulation method, the entering amount of cold air media is increased, and after the discharge amount of hot air at the top of the motor is increased, the cooling effect of the motor is obviously enhanced. For example, when the temperature of the motor of the circulating water pump is reduced by 18 ℃ after being modified under the condition of the environmental temperature of 20 ℃ than before being modified, a good effect is achieved, and the data result under the condition of the environmental temperature of 20 ℃ is shown in the table below.
After the improvement, the temperature of a motor coil is reduced by 15-20 ℃ on the basis of the original temperature after 2 axial flow fan motors are started, and the defect that the temperature of the circulating water pump motor is high in a power plant from 2019 is almost reduced to 0.
In the maintenance process, the alarm temperature of the motor coil of the circulating water pump is set to be 120 ℃, and when the temperature of the motor coil exceeds 120 ℃, an operator fills in an SAP defect list. Before transformation, a maintainer encounters a similar defect list, the maintainer is not proper and cannot eliminate the similar defect, a load reduction method is often adopted to meet a motor operation method, the output of a unit in the factory is seriously influenced, and the on-site 2 axial flow fans can be controlled to be turned on and off according to weather and temperature conditions after transformation.
To the control that present internal large-scale motor temperature is high, the utility model discloses can provide an effectual transformation foundation.
The present invention and the embodiments thereof have been described above, but the description is not limited thereto, and the embodiment shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. In summary, those skilled in the art should understand that they should not be limited to the embodiments described above, and that they can design the similar structure and embodiments without departing from the spirit of the invention.
Claims (5)
1. The utility model provides a large-scale pump motor ventilation cooling system that follows, includes water cooling plant (2) of pump motor (1) and pump motor (1) area certainly, water cooling plant (2) and pump motor (1) coil, decide rotor place space intercommunication, its characterized in that: the utility model discloses a pump motor, including circulating pump motor (1), air inlet (3) and circulating pump motor (1) coil, stator and rotor place space intercommunication, air inlet (3) are connected with cold air blower (4) through the tuber pipe, circulating pump motor (1) top is equipped with a plurality of steam discharge holes (5), steam discharge hole (5) and circulating pump motor (1) coil, stator and rotor place space intercommunication.
2. The large-scale pump motor ventilation and heat dissipation system of claim 1, wherein: the hot air discharge hole (5) comprises a hollow cylinder (501), a fixing plate (502) is arranged at the bottom of the hollow cylinder (501), and a hemispherical shield (503) is connected to the top of the hollow cylinder (501).
3. The large-scale pump motor ventilation and heat dissipation system of claim 1, wherein: and a filter screen (6) is arranged on the air pipe between the cold air blower (4) and the air inlet (3).
4. The large-scale pump motor ventilation and heat dissipation system of claim 1, wherein: the number of the air inlets (3) is at least 2, and the number of the hot air discharge holes (5) is at least 4.
5. The large-scale pump motor ventilation and heat dissipation system of claim 1, wherein: the cold air fan (4) adopts an axial flow fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020668645.3U CN212367060U (en) | 2020-04-28 | 2020-04-28 | Large-scale circulating pump motor ventilation cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020668645.3U CN212367060U (en) | 2020-04-28 | 2020-04-28 | Large-scale circulating pump motor ventilation cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212367060U true CN212367060U (en) | 2021-01-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020668645.3U Expired - Fee Related CN212367060U (en) | 2020-04-28 | 2020-04-28 | Large-scale circulating pump motor ventilation cooling system |
Country Status (1)
| Country | Link |
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| CN (1) | CN212367060U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115425802A (en) * | 2022-09-23 | 2022-12-02 | 浙江安吉天子湖热电有限公司 | Circulating water pump economizer system |
-
2020
- 2020-04-28 CN CN202020668645.3U patent/CN212367060U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115425802A (en) * | 2022-09-23 | 2022-12-02 | 浙江安吉天子湖热电有限公司 | Circulating water pump economizer system |
| CN115425802B (en) * | 2022-09-23 | 2023-05-30 | 浙江安吉天子湖热电有限公司 | Circulating water pump economizer system |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210115 |
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| CF01 | Termination of patent right due to non-payment of annual fee |