CN215871086U - Synchronous motor cooling system - Google Patents
Synchronous motor cooling system Download PDFInfo
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- CN215871086U CN215871086U CN202122101548.3U CN202122101548U CN215871086U CN 215871086 U CN215871086 U CN 215871086U CN 202122101548 U CN202122101548 U CN 202122101548U CN 215871086 U CN215871086 U CN 215871086U
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The utility model relates to a cooling system of a synchronous motor, comprising: the air conditioner comprises a shell, wherein a sealed space is formed inside the shell, an air inlet is formed in the shell, a power shaft is arranged in the center of the inside of the shell, the power shaft is supported through a thrust bearing and a guide bearing, an oil cylinder is arranged on the outer side of the power shaft, and a balance air hole is formed in the oil cylinder; the motor is positioned in the shell and comprises a stator and a rotor, the stator is fixedly connected with the shell, and the rotor is fixedly arranged on the power shaft; the evaporator is arranged in the oil cylinder and formed by connecting a plurality of double-solenoid pipes, and gas filling is arranged in the evaporator; the condenser is positioned outside the shell; the condenser, the evaporator and the shell are communicated through a circulating pipeline, a flow regulating device is arranged on the pipeline between the condenser and the evaporator, and an exhaust fan is arranged on the pipeline between the shell and the condenser; through the air circulation system, the problem of overheating of the synchronous motor is solved, and the uniform cooling of the interior of the motor is realized.
Description
The technical field is as follows:
the utility model relates to a cooling system of a synchronous motor.
Background art:
the main motor of the axial-flow pump water pump unit of the large-scale pump station is a synchronous motor, the thrust bearing and the guide bearing can generate a large amount of heat during the operation of the motor, because the thrust bearing and the guide bearing are different in oil cavity, friction stress, space, size and the like, the conditions that the temperature of the thrust bearing and the temperature of the guide bearing are different easily occur, thereby the thermal expansion coefficients of the thrust bearing and the guide bearing are different, the stress of the internal structure is changed, the thrust bearing and the guide bearing can be slightly asynchronous when the power shaft rotates, blocking, extra stress and the like, the damage of the thrust bearing and the guide bearing can be accelerated after the time is long, the service life is shortened, and the thrust bearing and the guide bearing must be cooled in time.
At present, the synchronous motor mainly adopts three modes of water cooling, oil cooling and air cooling. The water cooling is a form of liquid cooling, mainly cools a stator or a rotor, generally, a groove is formed at the bottom of a winding, a cooling water pipe is arranged for circulating and reciprocating, the heat of the winding and an iron core is taken away, heat is exchanged by a cooler, the specific heat capacity of water is high, the cooling capacity is strong, but the water cooling cost is high, the structure is complex, the failure rate is high, and the occupied space of a water tank is large; the oil cooling is another form of liquid cooling, the cooling medium is oil, and has the characteristics of non-magnetic conduction and non-electric conduction, the oil can be cooled through a pipeline, and can also be directly contacted with a winding and an iron core with higher temperature for cooling, but the purity of the oil liquid is high, otherwise, once impurities are introduced, the condition of insulation damage between winding coils can occur, a motor is directly burnt, the phenomenon of uneven cooling often occurs in the oil cooling, and the cooling efficiency is relatively low, so the oil cooling mode generally utilizes a refrigerant to cool the oil, the refrigerant is an intermediate substance, the refrigerant receives the cold energy of a refrigerant to cool the oil firstly, and then the oil is cooled, so the cost of the oil cooling is increased; the air cooling is also one of cooling modes, the object to be cooled is cooled by using air as a medium, the surface area of the object to be cooled is usually enlarged, or the speed of air flowing through the object in unit time is increased, or the air cooling mode and the cooling mode are shared by two methods, the former method can be realized by adding radiating fins on the surface of the object, and the latter method can be used for enhancing ventilation and enhancing cooling effects by using a fan.
The existing air cooling system of the synchronous motor also has some disadvantages in use, one is that: most of the air cooling system cools the surface of the motor by means of the cooling fins, and the thrust bearing and the guide bearing cannot be directly cooled locally; secondly, some air cooling systems enhance ventilation by means of a fan, only speed of air flowing through the motor in unit time is increased, cooling inside the motor is not uniform, air flow cannot be effectively controlled, air as medium cooling flows away without fully reacting inside the motor, and cooling efficiency is reduced; thirdly, the method comprises the following steps: some air cooling systems on the market have adopted the evaporimeter, put into the evaporimeter with gaseous refrigerant in, gaseous refrigerant carries out the heat exchange through evaporimeter and external air, gaseous refrigerant heat absorption becomes high-temperature gas, reach the cooling effect, but evaporimeter in use can be because of fan wind-force is too big and throw off sometimes, it is fixed to need through the installation frame during installation, and current evaporimeter includes heating chamber and evaporating chamber two parts, the heat absorption capacity is directly proportional with the volume, the evaporimeter volume that the cooling effect is good is great relatively, can only install outside synchronous machine, so can not directly cool off thrust bearing and guide bearing, only carry out whole cooling with the motor inside, reach the cooling effect.
In summary, the structure and cooling problems of the existing air cooling system of the synchronous motor become a technical problem to be solved urgently in the industry.
The utility model has the following contents:
in order to make up for the defects of the prior art, the utility model provides the cooling system of the synchronous motor, which solves the overheating problem of the synchronous motor by utilizing the air circulation system and regulating the flow of the gas coolant, realizes the uniform cooling of the interior of the motor, reduces the use cost and improves the cooling efficiency.
The technical scheme adopted by the utility model for solving the technical problems is as follows:
a synchronous machine cooling system comprising:
the air conditioner comprises a shell, wherein a sealed space is formed inside the shell, an air inlet is formed in the shell, a power shaft is arranged in the center of the inside of the shell, the power shaft is supported through a thrust bearing and a guide bearing, an oil cylinder is arranged on the outer side of the power shaft, and a balance air hole is formed in the oil cylinder;
the motor is positioned in the shell and comprises a stator and a rotor, the stator is fixedly connected with the shell, and the rotor is fixedly arranged on the power shaft;
the evaporator is arranged in the oil cylinder and formed by connecting a plurality of double-solenoid pipes, and gas filling is arranged in the evaporator;
a condenser located outside the housing;
the condenser, the evaporator and the shell are communicated through a circulating pipeline, a flow adjusting device is arranged on a pipeline between the condenser and the evaporator, and an exhaust fan is arranged on a pipeline between the shell and the condenser.
Preferably, circulation line includes intake pipe, outlet duct and muffler, inside intake pipe one end stretched into the casing, the other end and the entry intercommunication of condenser, the export intercommunication of outlet duct one end and condenser, the other end and the entry end intercommunication of evaporimeter, flow control device installs on the outlet duct, the air exhauster is installed in the intake pipe that is close to the casing, muffler one end and the exit end intercommunication of evaporimeter, the other end through three way connection with the intake pipe intercommunication that is close to the condenser.
Preferably, the flow regulating device comprises an expansion valve, a capillary tube, a temperature sensing bulb and a balance tube, one end of the capillary tube is communicated with the expansion valve, the other end of the capillary tube is communicated with the temperature sensing bulb filled with refrigerant, the temperature sensing bulb is fixedly arranged on an air return pipe at the outlet end of the evaporator in the shell, one end of the balance tube is communicated with the expansion valve, and the other end of the balance tube is communicated with the air return pipe at the outlet end of the evaporator.
Preferably, the expansion valve comprises a valve body, one end of the valve body, which is close to the capillary tube, is semicircular, the inner cavity of the valve body is provided with an elastic diaphragm, a needle valve and an overheating spring, the elastic diaphragm is a circular film-shaped elastic sensitive element and is fixedly arranged on the inner wall of one semicircular end of the valve body, one end of the needle valve is fixedly connected with a valve rod, one end of the valve rod is fixed in the center of the elastic diaphragm, the valve rod is fixedly connected with the valve seat, a movable gap is arranged between the valve seat and the inner cavity of the valve body, one end of the overheating spring is abutted with the baffle, the other end of the overheating spring is abutted with the adjusting bolt, an adjusting nut matched with the adjusting bolt is positioned outside the valve body, a retaining wall is arranged between the needle valve and the valve seat, the valve rod slides and is located in the retaining wall, an air inlet and an air outlet are arranged on the valve body, the air inlet is communicated with the condenser through an air outlet pipe, and the air outlet is communicated with the evaporator through the air outlet pipe.
Preferably, be provided with needle valve shape matched with through-hole on the barricade, the diameter of through-hole is greater than the diameter of valve rod, the diameter of needle valve is less than the diameter of baffle.
Preferably, the air inlet and the air outlet are distributed in a staggered mode relative to the valve body and are located on two sides of the retaining wall.
Preferably, the valve body is made of alloy steel.
By adopting the scheme, the utility model has the following beneficial effects:
(1) through arranging a circulation pipeline, low-temperature and low-pressure air enters the shell through an air inlet, a power shaft drives a rotor to move to compress the air into high-temperature and high-pressure air, an exhaust fan sucks the high-temperature and high-pressure air into an air inlet pipe and sends the air into a condenser, the high-temperature and high-pressure air exchanges heat with the inner wall of a condenser pipe to transfer heat to ambient air to become low-temperature and high-pressure air, the low-temperature and high-pressure air reaches a flow regulating device through an air outlet pipe, then the low-temperature and high-pressure air is reduced and throttled by the flow regulating device and becomes low-temperature and low-pressure gas refrigerant, the low-temperature and low-pressure gas refrigerant enters an evaporator through an air outlet pipe again after entering an evaporator through the air outlet pipe, the low-temperature and low-pressure gas refrigerant exchanges heat with the ambient air through the inner wall of the evaporator to rapidly absorb heat in an ambient oil cylinder, the high-temperature gas finally enters a return pipe from the outlet end of the evaporator to a tee joint and returns to the condenser together with the high-temperature and high-pressure gas entering the air inlet pipe to carry out next circulation, the problem of overheating of the synchronous motor is solved by utilizing the air circulation system;
(2) the evaporator is arranged in the oil cylinder and outside the power shaft, the installation position can directly cool the thrust bearing and the guide bearing and cool the interior of the oil cylinder, a proper amount of gas which takes air as gas refrigerant is filled in the evaporator in advance, and the evaporator can exchange heat with high-temperature air in the oil cylinder in advance before the treated gas refrigerant in the condenser reaches the evaporator, so that the reaction is accelerated, and the cost can be saved by taking the air as the gas refrigerant;
(3) the flow regulating device is arranged, the evaporation temperature of the gas refrigerant is utilized, the temperature at the outlet end of the evaporator is measured through the temperature sensing bulb, the temperature information is converted into pressure information, the opening and closing of the expansion valve are realized, the flow of the gas refrigerant passing through the expansion valve is controlled, the air inlet and the air outlet of the expansion valve are arranged in a staggered mode and are positioned on two sides of the retaining wall, conditions are created for pressure reduction and throttling of the low-temperature high-pressure gas refrigerant, the cooling efficiency of the evaporator is improved, the double-solenoid forming the evaporator is guaranteed to exert all heat absorption capacity, and the heat exchange process is indirectly controlled;
(4) through the through hole matched with the needle valve in shape is formed in the retaining wall, when the overheating spring is in an extension state, the needle valve is pushed into the through hole by the baffle, the expansion valve is closed, the diameter of the through hole is larger than that of the valve rod, when the elastic diaphragm is stressed to extend, the needle valve is pushed out of the through hole by the valve rod, gas refrigerants can enter an inner cavity of the valve body from the air inlet, and then the gas refrigerants can flow through the through hole in the retaining wall from gaps on two sides of the valve rod to achieve closing of the expansion valve.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of the flow rate regulating device of the present invention.
Fig. 3 is a plan view of the evaporator of the present invention.
In the figure, 1, a shell, 2, an air inlet, 3, a power shaft, 4, a thrust bearing, 5, a guide bearing, 6, an oil cylinder, 7, a balance air hole, 8, a stator, 9, a rotor, 10, an evaporator, 11, a condenser, 12, an exhaust fan, 13, an air inlet pipe, 14, an air outlet pipe, 15, an air return pipe, 16, a three-way joint, 17, a capillary pipe, 18, a temperature sensing bag, 19, a balance pipe, 20, a valve body, 21, an elastic diaphragm, 22, a needle valve, 23, an overheating spring, 24, a valve rod, 25, a valve seat, 26, a baffle, 27, an adjusting nut, 28, a retaining wall, 29, an air inlet, 30 and an air outlet.
The specific implementation mode is as follows:
in order to clearly explain the technical features of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings.
In connection with the embodiments shown in fig. 1-3, a synchronous machine cooling system, comprising:
the air conditioner comprises a shell 1, wherein a sealed space is formed inside the shell 1, an air inlet 2 is formed in the shell 1, a power shaft 3 is arranged in the center of the inside of the shell 1, the power shaft 3 is supported through a thrust bearing 4 and a guide bearing 5, an oil cylinder 6 is arranged on the outer side of the power shaft 3, and a balance air hole 7 is formed in the oil cylinder 6; air in the shell 1 can enter the inner cavity of the oil cylinder 6 through the balance air hole 7 on the oil cylinder 6 to create conditions for heat exchange.
The motor is positioned inside the shell 1 and comprises a stator 8 and a rotor 9, the stator 8 is fixedly connected with the shell 1, and the rotor 9 is fixedly arranged on the power shaft 3; when the motor is powered on, the whole system drives the rotor 9 to rotate through the power shaft 3 to compress low-temperature and low-pressure air entering the shell 1, the low-temperature and low-pressure air is converted into high-temperature and high-pressure air serving as refrigerant gas, and the high-temperature and high-pressure air passes through the air inlet 29 and the condenser 11 under the action of the exhaust fan 12 to provide power for the refrigeration cycle, so that the refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption) is realized.
The evaporator 10 is installed inside the oil cylinder 6, the evaporator 10 is formed by connecting a plurality of double-solenoid pipes, and gas filling is arranged in the evaporator 10; the evaporator 10 is installed in the oil cylinder 6 and outside the power shaft 3, so when the gas refrigerant exchanges heat with the high-temperature air in the oil cylinder 6 through the inner wall of the evaporator 10, the thrust bearing 4 and the guide bearing 5 can be directly cooled and the temperature in the oil cylinder 6 can be reduced, the surface area of the evaporator 10 can be increased by adopting the structural design of double solenoids, the heat exchange area is increased, the cooling process is accelerated, in addition, gas filling is arranged in the evaporator 10, and air is used as the gas refrigerant, so before the processed low-temperature high-pressure gas refrigerant in the condenser 11 flows into the evaporator 10, the gas refrigerant in the evaporator 10 can exchange heat with the high-temperature air in the oil cylinder 6 in advance, the reaction is accelerated, and the cost can be saved by using the air as the gas refrigerant.
A condenser 11, wherein the condenser 11 is positioned outside the shell 1; the operation of the condenser 11 is exothermic and the heat in its internal tubes is transferred in a rapid manner to the air in the vicinity of the tubes to change the hot gas to a cold gas.
The condenser 11, the evaporator 10 and the shell 1 are communicated through a circulating pipeline, a flow adjusting device is arranged on a pipeline between the condenser 11 and the evaporator 10, and an exhaust fan 12 is arranged on a pipeline between the shell 1 and the condenser 11.
Circulation line includes intake pipe 13, outlet duct 14 and muffler 15, intake pipe 13 one end stretches into inside casing 1, the other end and condenser 11's entry intercommunication, 14 one end of outlet duct and condenser 11's export intercommunication, the other end and evaporimeter 10's entry end intercommunication, flow control device installs on outlet duct 14, air exhauster 12 is installed in the intake pipe 13 that is close to casing 1, 15 one ends of muffler and evaporimeter 10's exit end intercommunication, the other end through three way connection 16 with be close to condenser 11's intake pipe 13 intercommunication. The exhaust fan 12 is used to convey the high-temperature and high-pressure air in the casing 1 to the condenser 11, and the three-way joint 16 is designed to allow the high-temperature gas after the heat exchange at the outlet end of the evaporator 10 and the high-temperature and high-pressure gas entering the inlet pipe 13 to return to the condenser 11 for the next circulation.
The flow regulating device comprises an expansion valve, a capillary tube 17, a temperature sensing bulb 18 and a balance tube 19, one end of the capillary tube 17 is communicated with the expansion valve, the other end of the capillary tube 17 is communicated with the temperature sensing bulb 18 filled with refrigerant, the temperature sensing bulb 18 is fixedly arranged on an air return pipe 15 at the outlet end of the evaporator 10 in the shell 1, one end of the balance tube 19 is communicated with the expansion valve, and the other end of the balance tube 19 is communicated with the air return pipe 15 at the outlet end of the evaporator 10. The expansion valve can throttle the low-temperature high-pressure gas refrigerant into the low-temperature low-pressure gas refrigerant. The temperature sensing bulb 18 is used for sensing the temperature of the outlet end of the evaporator 10 and converting the temperature information into pressure information, when the refrigerant in the temperature sensing bulb 18 reaches the set temperature, the refrigerant is heated and expanded to reach the elastic diaphragm 21 of the inner cavity of the valve body 20 through the capillary tube 17 and transmits the pressure to the elastic diaphragm 21, the elastic diaphragm 21 moves towards the direction far away from the thermal spring, and the gate is opened; when the temperature of the outlet end of the evaporator 10 is reduced, the temperature of the refrigerant in the thermal bulb 18 is reduced, the volume of the refrigerant is reduced, the refrigerant in the inner cavity of the valve body 20 is contracted, the refrigerant returns to the thermal bulb 18 through the capillary tube 17, the pressure of the elastic diaphragm 21 close to the semicircular side of the valve body 20 is reduced, the elastic diaphragm 21 is reset, and the gate is closed. The balance tube 19 is used for adjusting the pressure drop at two ends of the evaporator 10, when the pressure drop at the inlet end and the outlet end of the evaporator 10 is large, the balance tube 19 can quote the pressure drop at the outlet end of the evaporator 10, and transmit the pressure drop to the center of the elastic membrane 21 to enable the elastic membrane 21 to move towards the direction far away from the thermal spring, so as to reduce the input amount of gas refrigerant in the valve body 20, meanwhile, a proper amount of gas refrigerant enters the balance tube 19 from the movable gap between the valve seat 25 and the valve body 20, finally, the pressure in the pipeline reaching the outlet end of the evaporator 10 is increased, when the pressure drop at the inlet end and the outlet end is small, the balance tube 19 stops moving, and meanwhile, the part of gas refrigerant exchanges heat with hot air in the oil cylinder 6 in the pipeline.
The expansion valve comprises a valve body 20, one end of the valve body 20 close to the capillary tube 17 is semicircular, the inner cavity of the valve body 20 is provided with an elastic membrane 21, a needle valve 22 and an overheating spring 23, the elastic membrane 21 is a circular membranous elastic sensitive element, the fixed mounting is on the inner wall of the semicircular end of the valve body 20, one end of the needle valve 22 is fixedly connected with the valve rod 24, one end of the valve rod 24 is fixed at the center of the elastic membrane 21, the valve rod 24 is fixedly connected with a valve seat 25, a movable gap is arranged between the valve seat 25 and the inner cavity of the valve body 20, one end of the overheating spring 23 is abutted against a baffle 26, the other end of the overheating spring is abutted against an adjusting bolt, an adjusting nut 27 matched with the adjusting bolt is positioned outside the valve body 20, a retaining wall 28 is arranged between the needle valve 22 and the valve seat 25, the valve rod 24 is slidably positioned in the retaining wall 28, an air inlet 29 and an air outlet 30 are arranged on the valve body 20, the air inlet 29 is communicated with the condenser 11 through an air outlet pipe 14, and the air outlet 30 is communicated with the evaporator 10 through the air outlet pipe 14. When two sides of the elastic diaphragm 21 are acted by different pressures, the elastic diaphragm 21 moves towards the side with lower pressure in a strain manner, so that the center of the elastic diaphragm generates displacement in a certain relation with the pressure difference, the elastic diaphragm 21 drives the needle valve 22 fixedly connected with the valve rod 24 to move in the inner cavity of the valve body 20 between the retaining wall 28 and the air outlet 30, and the flow regulation of the gas refrigerant and the opening and closing of the expansion valve are realized. The compression amount of the overheating spring 23 is adjusted by the adjusting nut 27, and when the adjusting nut 27 is rotated clockwise, the compression amount of the overheating spring 23 is increased, the spring force is increased, and further, the opening degree of the expansion valve is decreased, so that the flow rate of the gas refrigerant is decreased, whereas when the adjusting nut 27 is rotated counterclockwise, the compression amount of the overheating spring 23 is decreased, the spring force is decreased, further, the opening degree of the expansion valve is increased, so that the flow rate of the gas refrigerant is increased.
The retaining wall 28 is provided with a through hole matched with the shape of the needle valve 22, the diameter of the through hole is larger than that of the valve rod 24, and the diameter of the needle valve 22 is smaller than that of the baffle 26. By providing the through hole on the retaining wall 28 in a shape matching the needle valve 22, when the overheating spring 23 is in an extended state, the needle valve 22 is pushed into the through hole by the baffle 26, so that the purpose of throttling is achieved, the diameter of the through hole is larger than that of the valve rod 24, when the elastic diaphragm 21 is extended under the stress, the needle valve 22 is pushed out of the through hole by the valve rod 24, and the gas refrigerant can enter the inner cavity of the valve body 20 from the gas inlet 29, then flow out from the gaps on both sides of the valve rod 24 through the through hole on the retaining wall 28, and finally flow out from the gas outlet 30.
The air inlet 29 and the air outlet 30 are distributed in a staggered manner with respect to the valve body 20 and are located on both sides of the retaining wall 28. Such a position design can provide for pressure reduction and throttling of the low-temperature high-pressure gas refrigerant.
The valve body 20 is made of alloy steel. The alloy steel has the characteristics of high strength and good cold and hot pressure processability, and is suitable for being used as a high-temperature and high-pressure valve of a non-corrosive medium.
The working principle is as follows:
opening an expansion valve: low-temperature and low-pressure air enters the shell 1 through the air inlet 2, after the motor is powered on, the power shaft 3 drives the rotor 9 to move to compress the low-temperature and low-pressure air to enable the low-temperature and low-pressure air to be changed into high-temperature and high-pressure air, meanwhile, the thrust bearing 4 and the guide bearing 5 can generate some heat to accelerate the rapid temperature rise of the air in the shell 1 and the oil cylinder 6, the exhaust fan 12 sucks most of the high-temperature and high-pressure air into the air inlet pipe 13 and sends the air into the condenser 11, the high-temperature and high-pressure air releases heat in the condenser 11, the heat in the pipe inside the condenser 11 is rapidly transferred to the air near the pipe to change the high-temperature and high-pressure air into the low-temperature and high-pressure air, at the moment, the expansion valve is still in a closed state, the high-temperature air in the shell 1 enters the oil cylinder 6 through the balance air hole 7, and the gas refrigerant in the evaporator 10 exchanges heat with the high-temperature air in the oil cylinder 6 through the inner wall of the evaporator 10, the gas refrigerant absorbs heat and becomes high-temperature gas, the high-temperature gas enters the air return pipe 15 from the outlet end of the evaporator 10 and then reaches the three-way joint 16, the high-temperature high-pressure gas entering the air inlet 29 returns to the condenser 11, the temperature of the outlet end of the evaporator 10 rises along with the consumption of the gas refrigerant in the evaporator 10, the refrigerant in the temperature sensing bulb 18 arranged at the position reaches the set temperature, then is heated and expands to pass through the capillary tube 17 to the semicircular inner cavity of the valve body 20, the temperature information is converted into pressure information and is transmitted to the elastic diaphragm 21, the elastic diaphragm 21 moves towards the direction of the thermal spring, the elastic diaphragm 21 pushes the valve rod 24 and the needle valve 22 fixedly connected with the valve rod 24 to move in the same direction, the needle valve 22 is gradually pushed out of the through hole of the retaining wall 28, the needle valve 22 pushes the thermal spring abutting against the baffle 26 to move in the same direction, the overheating spring 23 is compressed, the expansion valve is opened, and the low-temperature high-pressure gas refrigerant is discharged from the outlet end of the condenser 11 and enters the air outlet pipe 14, then the refrigerant reaches an air inlet 29 of the valve body 20 and enters an inner cavity of the valve body 20, the refrigerant flows through holes on a retaining wall 28 from gaps on two sides of a valve rod 24, air outlets 30 are formed in the air inlet 29 in a staggered mode, the low-temperature high-pressure gas refrigerant is reduced in pressure and throttled to become a low-temperature low-pressure gas refrigerant, the flow of the gas refrigerant passing through an expansion valve is gradually increased, an overheating spring 23 is finally static, the low-temperature low-pressure gas refrigerant smoothly flows out of the air outlets 30 and enters an air outlet pipe 14 again, the low-temperature low-pressure gas refrigerant reaches an inlet end of an evaporator 10 through the air outlet pipe 14 and enters a double-spiral pipe of the evaporator 10, the low-temperature low-pressure gas refrigerant exchanges heat with high-temperature air in an oil cylinder 6 through the inner wall of the double-spiral pipe to absorb surrounding heat, the low-temperature low-pressure gas refrigerant becomes high-temperature gas after the endothermic reaction is finished and enters a return pipe again, and the low-temperature high-pressure gas entering the air inlet 29 and returns to a condenser 11 at a three-way joint to prepare for next circulation.
Closing the expansion valve: along with the gradual increase of the gas refrigerant in the evaporator 10, the heat in the environment around the evaporator 10 is taken away by the gas refrigerant, the heat in the thrust bearing 4 and the guide bearing 5 is rapidly cooled down after being transferred away, the temperature in the oil cylinder 6 is reduced, the temperature at the outlet end of the evaporator 10 is reduced, the refrigerant in the thermal bulb 18 gradually reduces in shrinkage volume when encountering cold, returns to the thermal bulb 18 through the capillary tube 17, the pressure of the elastic diaphragm 21 close to the semicircular end of the valve body 20 is reduced, the elastic diaphragm 21 slowly shrinks and resets in the direction away from the overheating spring 23, the elastic diaphragm 21 pulls the valve rod 24 and the needle valve 22 fixedly connected with the valve rod 24 to move in the same direction, the needle valve 22 is gradually pulled into the through hole of the retaining wall 28, the thermal spring abutting against the baffle 26 gradually extends and resets, the flow of the gas refrigerant passing through the through hole of the retaining wall 28 is reduced, finally, the needle valve 22 is inserted in the through hole, and the baffle 26 abuts against the needle valve 22 tightly, the expansion valve is closed and the gaseous refrigerant no longer passes through the expansion valve.
The above-described embodiments should not be construed as limiting the scope of the utility model, and any alternative modifications or alterations to the embodiments of the present invention will be apparent to those skilled in the art.
The present invention is not described in detail, but is known to those skilled in the art.
Claims (7)
1. A synchronous machine cooling system characterized by: the method comprises the following steps:
the air conditioner comprises a shell, wherein a sealed space is formed inside the shell, an air inlet is formed in the shell, a power shaft is arranged in the center of the inside of the shell, the power shaft is supported through a thrust bearing and a guide bearing, an oil cylinder is arranged on the outer side of the power shaft, and a balance air hole is formed in the oil cylinder;
the motor is positioned in the shell and comprises a stator and a rotor, the stator is fixedly connected with the shell, and the rotor is fixedly arranged on the power shaft;
the evaporator is arranged in the oil cylinder and formed by connecting a plurality of double-solenoid pipes, and gas filling is arranged in the evaporator;
a condenser located outside the housing;
the condenser, the evaporator and the shell are communicated through a circulating pipeline, a flow adjusting device is arranged on a pipeline between the condenser and the evaporator, and an exhaust fan is arranged on a pipeline between the shell and the condenser.
2. A synchronous machine cooling system according to claim 1, characterized in that: the circulating line includes intake pipe, outlet duct and muffler, intake pipe one end stretches into inside the casing, the other end and the entry intercommunication of condenser, the export intercommunication of outlet duct one end and condenser, the other end and the entry end intercommunication of evaporimeter, flow control device installs on the outlet duct, the air exhauster is installed in the intake pipe that is close to the casing, muffler one end and the exit end intercommunication of evaporimeter, the other end through three way connection with the intake pipe intercommunication that is close to the condenser.
3. A synchronous machine cooling system according to claim 2, characterized in that: the flow regulating device comprises an expansion valve, a capillary tube, a temperature sensing bulb and a balance tube, one end of the capillary tube is communicated with the expansion valve, the other end of the capillary tube is communicated with the temperature sensing bulb filled with refrigerant, the temperature sensing bulb is fixedly arranged on an air return pipe at the outlet end of the evaporator in the shell, one end of the balance tube is communicated with the expansion valve, and the other end of the balance tube is communicated with the air return pipe at the outlet end of the evaporator.
4. A synchronous machine cooling system according to claim 3, characterized in that: the expansion valve comprises a valve body, one end of the valve body close to the capillary tube is semicircular, an elastic diaphragm, a needle valve and an overheating spring are arranged in the inner cavity of the valve body, the elastic diaphragm is a circular film-shaped elastic sensitive element and is fixedly arranged on the inner wall of the semicircular end of the valve body, one end of the needle valve is fixedly connected with a valve rod, one end of the valve rod is fixed in the center of the elastic diaphragm, the valve rod is fixedly connected with the valve seat, a movable gap is arranged between the valve seat and the inner cavity of the valve body, one end of the overheating spring is abutted with the baffle, the other end of the overheating spring is abutted with the adjusting bolt, an adjusting nut matched with the adjusting bolt is positioned outside the valve body, a retaining wall is arranged between the needle valve and the valve seat, the valve rod slides and is located in the retaining wall, an air inlet and an air outlet are arranged on the valve body, the air inlet is communicated with the condenser through an air outlet pipe, and the air outlet is communicated with the evaporator through the air outlet pipe.
5. The synchronous machine cooling system according to claim 4, characterized in that: be provided with needle valve shape matched with through-hole on the barricade, the diameter of through-hole is greater than the diameter of valve rod, the diameter of needle valve is less than the diameter of baffle.
6. The synchronous machine cooling system according to claim 4, characterized in that: the air inlet and the air outlet are distributed in a staggered mode relative to the valve body and are located on two sides of the retaining wall.
7. The synchronous machine cooling system according to claim 4, characterized in that: the valve body is made of alloy steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122101548.3U CN215871086U (en) | 2021-09-01 | 2021-09-01 | Synchronous motor cooling system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122101548.3U CN215871086U (en) | 2021-09-01 | 2021-09-01 | Synchronous motor cooling system |
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| CN215871086U true CN215871086U (en) | 2022-02-18 |
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2021
- 2021-09-01 CN CN202122101548.3U patent/CN215871086U/en active Active
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