阅读说明：本技术 用于发电机的散热装置和发电机 (Heat dissipation device for generator and generator ) 是由 郭伟 于 2021-08-02 设计创作，主要内容包括：本发明涉及发电机散热技术领域,公开了一种用于发电机的散热装置和发电机,该用于发电机的散热装置包括通风机构和套装在该机壳(201)外并允许冷却液流过的外冷却管(23),所述通风机构设置为能够通过气流带走由所述外冷却管(23)散发的热量和/或由所述机壳(201)散发的热量。本发明中的该用于发电机的散热装置具有高效的散热能力。(The invention relates to the technical field of generator heat dissipation, and discloses a heat dissipation device for a generator and the generator, wherein the heat dissipation device for the generator comprises a ventilation mechanism and an outer cooling pipe (23) which is sleeved outside a machine shell (201) and allows cooling liquid to flow through, and the ventilation mechanism is set to be capable of taking away heat dissipated by the outer cooling pipe (23) and/or heat dissipated by the machine shell (201) through airflow. The heat dissipation device for the generator has high-efficiency heat dissipation capacity.)

1. A heat sink for an electrical generator, characterised in that the electrical generator (2) comprises a housing (201), the heat sink comprising an outer cooling tube (23) which is fitted around the housing (201) and which allows a cooling fluid to flow through, and a ventilation mechanism which is arranged to enable the heat dissipated by the outer cooling tube (23) and/or the heat dissipated by the housing (201) to be carried away by an air flow.

2. The heat sink for generator according to claim 1, wherein the outer cooling pipe (23) is spirally wound around the outer layer of the casing (201).

3. The heat sink for electric generator according to claim 1, wherein the ventilation mechanism comprises an air pump (20), a vent pipe (21) communicating with the air pump (20), and a plurality of branch pipes (22) connected to the vent pipe (21) and extending toward the outer cooling pipe (23) and/or the housing (201), respectively.

4. The heat sink for generator as claimed in claim 1, wherein the ventilation mechanism comprises a protective cover (3) surrounding the housing (201), the protective cover (3) has a plurality of through holes (19), and the outer cooling tube (23) is coiled outside the protective cover (3).

5. The heat sink for an electric generator according to claim 1, wherein the ventilation mechanism comprises a pressure difference chamber (6), a piston plate (17) located in the pressure difference chamber (6), and a driving assembly drivingly connected to the piston plate (17), the driving assembly being configured to drive the piston plate (17) to reciprocate in the pressure difference chamber (6) to expel heat dissipated by the outer cooling tube (23) and/or by the housing (201) outwardly.

6. The heat sink for generator as claimed in claim 5, wherein the ventilation mechanism comprises a first partition plate (4) and a second partition plate (5) installed outside the outer cooling tube (23) and formed into the pressure difference chamber (6) between the first partition plate (4) and the second partition plate (5), and the first partition plate (4) and the second partition plate (5) are respectively provided with an air port to allow the heat dissipated by the outer cooling tube (23) to sequentially enter the pressure difference chamber (6) through the air port and to be discharged to the outside.

7. The heat dissipation device for the generator according to claim 5, wherein the driving assembly comprises a base (13) located in the pressure difference chamber (6), a linear sliding chute (14) formed in the base (13), a push rod (16) slidably mounted in the linear sliding chute (14), and a cam (12) drivingly connected to a rotating shaft (11) of the generator, and the cam (12) and the push rod (16) are mutually matched so as to drive the push rod (16) to drive the piston plate (17) to reciprocate in the pressure difference chamber (6) when the rotating shaft (11) rotates.

8. Generator, characterized in that it comprises a heat sink for a generator according to any one of claims 1-7.

9. Generator according to claim 8, characterized in that said casing (201) has internal cooling channels (202) made therein allowing said cooling liquid to flow through.

10. Generator according to claim 9, characterised in that said inner cooling channel (202) is helical and that the helical axis of said inner cooling channel (202) is collinear with the central axis of said casing (201).

Technical Field

The invention relates to the technical field of generator heat dissipation, in particular to a heat dissipation device for a generator and the generator.

Background

The generator works outside to drive the rotor and the closed coil to do cutting magnetic induction line motion in the secondary field, and current can be generated in the closed coil; in the process that the rotor is driven to rotate by external work, the rotor and the stator are rubbed, induced electromotive force is generated between the electrified coils, and more heat is generated due to interaction, so that the temperature in the shell is increased, the magnetism of the permanent magnet material is reduced due to the temperature increase, the performance of the generator is reduced, and even the generator is damaged.

At present, among the current technical scheme, the generator all dispels the heat to the generator through cooling fan and fin, in addition continue the heat dissipation to the generator through water-cooled mode etc. but, it is not good to the radiating effect of generator through cooling fan and fin, and the radiating efficiency is on the low side, and the temperature of generator influences very greatly to the work efficiency of generator, promptly, influences the generating performance and the overload capacity of generator.

Disclosure of Invention

The invention aims to solve the problem that the temperature of a generator is too high to influence the power generation performance and overload capacity of the generator in the working process of the generator in the prior art, and provides a heat dissipation device for the generator and the generator.

In order to achieve the above object, an aspect of the present invention provides a heat dissipation device for a generator, the generator including a housing, the heat dissipation device including a ventilation mechanism and an outer cooling pipe that is sleeved outside the housing and allows a cooling liquid to flow through, the ventilation mechanism being configured to take away heat dissipated by the outer cooling pipe and/or heat dissipated by the housing by an air flow.

Optionally, the outer cooling tube is helically wound around the outer layer of the casing.

Optionally, the ventilation mechanism includes an air pump, a ventilation pipe communicated with the air pump, and a plurality of gas distribution pipes connected to the ventilation pipe and respectively extending toward the outer cooling pipe and/or the housing.

Optionally, the ventilation mechanism includes a protective cover disposed around the casing, the protective cover has a plurality of through holes, and the outer cooling pipe is wound around an outer side of the protective cover.

Optionally, the ventilation mechanism comprises a pressure difference chamber, a piston plate located in the pressure difference chamber, and a driving assembly in transmission connection with the piston plate, wherein the driving assembly is configured to drive the piston plate to reciprocate in the pressure difference chamber to discharge heat dissipated by the outer cooling pipe and/or the casing outwards.

Optionally, the ventilation mechanism includes a first partition plate and a second partition plate installed outside the outer cooling pipe, and the first partition plate and the second partition plate form the pressure difference cavity therebetween, and the first partition plate and the second partition plate are respectively provided with an air opening to allow heat dissipated by the outer cooling pipe to sequentially enter the pressure difference cavity through the air opening and be discharged to the outside.

Optionally, the drive assembly includes the base that is located the pressure differential intracavity, set up the sharp spout of base, slidable install push rod and transmission are connected to in the sharp spout the cam of the pivot of generator, the cam with the push rod is mutually supported, in order can be in the pivot drives when rotating the push rod drives the piston board is in pressure differential intracavity reciprocating motion.

In another aspect, the present invention provides a generator, including the heat dissipation device for a generator.

Optionally, an internal cooling channel is formed in the casing to allow the cooling liquid to flow through.

Optionally, the inner cooling channel is helical and the helical axis of the inner cooling channel is collinear with the central axis of the casing.

Through the technical scheme, the beneficial effects of the invention are as follows:

in the working process of the generator, the outer cooling pipe surrounds the periphery of the shell, cooling liquid in the outer cooling pipe is condensed by external cooling equipment, and the cooling liquid continuously and circularly flows to accelerate the heat dissipation of the shell; furthermore, the ventilation mechanism can take away the heat emitted by the outer cooling pipe and/or the heat emitted by the shell through airflow, so that the heat dissipation capacity of the shell can be improved, and the heat dissipation speed of the shell is accelerated.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

In the drawings:

the accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

Drawings

FIG. 1 is an axial cross-sectional view of a heat sink in the present invention;

FIG. 2 is a schematic radial cross-sectional view of a heat sink of the present invention;

FIG. 3 is a partial schematic view of FIG. 1

FIG. 4 is a schematic view of the drive assembly of the present invention in cooperation therewith;

FIG. 5 is a schematic view of the engagement of the damper with the first partition in the present invention;

FIG. 6 is a schematic view of the internal structure of the generator of the present invention;

fig. 7 is a schematic view of the structure of the inner cooling tube in the present invention.

Description of the reference numerals

1-shell, 2-generator, 201-shell, 202-inner cooling channel, 203-permanent magnet, 204-rotor, 205-winding, 3-protective cover, 4-first partition, 5-second partition, 6-differential pressure cavity, 7-crankshaft, 8-box, 9-pinion, 10-reduction gear, 11-rotating shaft, 12-cam, 13-base, 14-linear chute, 15-baffle, 16-push rod, 17-piston plate, 18-heat dissipation window, 19-through hole, 20-air pump, 21-air pipe, 22-air distribution pipe, 23-outer cooling pipe, 24-air door, 25-hinge, 26-first air valve, 27-second air valve, 28-third air valve, 29-fourth valve.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described in detail and completely with reference to the accompanying drawings. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.

As shown in fig. 1 and 2, the heat sink for a generator in the present invention includes a ventilation mechanism and an outer cooling pipe 23 which is sleeved outside the housing 201 and allows a cooling liquid to flow through, and the ventilation mechanism is configured to take away heat emitted from the outer cooling pipe 23 and/or heat emitted from the housing 201 by an air flow.

In the working process of the generator 2, the outer cooling pipe 23 surrounds the periphery of the casing 201, the cooling liquid in the outer cooling pipe 23 is subjected to heat exchange by external cooling equipment, and the cooling liquid continuously and circularly flows to accelerate the heat dissipation of the casing 201; further, the ventilation mechanism can take away the heat emitted by the outer cooling tube 23 and/or the heat emitted by the casing 201 through the airflow, so that the heat dissipation capability of the casing 201 can be improved, and the heat dissipation speed of the casing 201 is accelerated.

Wherein, through the relation between the inside temperature T of analysis casing 201, the velocity of flow v of coolant liquid in outer cooling tube 23 and the internal diameter d of outer cooling tube 23, can confirm the optimum velocity of flow of coolant liquid, further promote temperature reduction efficiency and radiating effect, specifically as follows:

in the present invention, the cross-section of the outer cooling tube 23 is preferably a circular structure; when cooling is performed through the outer cooling pipe 23, the temperature of the rotor 204 and the permanent magnet 203 in the casing 201 is reduced with the increase of the flow rate of the cooling liquid, and when the temperature is reduced to a certain degree, the flow rate of the cooling liquid is increased, and the reduction amplitude of the temperature rise is reduced; as can be seen from the above, the temperature T inside the cabinet 201, the flow velocity v of the cooling liquid in the outer cooling pipe 23, and the inner diameter d of the outer cooling pipe 23 satisfy: t is alpha.v/d; in the above formula, alpha is a temperature rise coefficient, and the value range is 0.036-0.254; v is in m/s; d is m; t is K; the cooling liquid with different flow rates has different influences on the reduction of the internal temperature of the shell 201, the temperature rise coefficient alpha and the diameter of the outer cooling pipe 23 are controlled to be unchanged, when the water flow rate is 0-1.0m/s, the cooling liquid is in a laminar flow stage, the internal temperature of the shell 201 is rapidly reduced along with the increase of the cooling water flow, when the water flow rate is 1.0-1.2m/s, the cooling liquid enters a turbulent flow stage, the cooling effect is further enhanced, however, the reduction range of the internal temperature of the shell 201 is gradually reduced, the flow rate of the cooling liquid is continuously improved, the reduction range of the internal temperature of the shell 201 is slightly changed, the heat dissipation efficiency is reduced, and water resources are wasted; therefore, in the present invention, the flow rate of the cooling liquid in the outer cooling pipe 23 is preferably 1.0 to 1.2m/s, the efficiency of temperature reduction of the generator 2 is the highest, and the heat radiation effect is the best.

The outer cooling pipe 23 of the present invention is spirally wound around the outer layer of the casing 201. Wherein, in the axial direction of the outer cooling pipe 23, the spiral outer cooling pipe 23 has a certain interval, so as to facilitate the gas flow at the outer side and the inner side of the outer cooling pipe 23, and improve the heat dissipation efficiency of the casing 201; the outer cooling tube 23 is spirally wound on the casing 201 to increase the effective area for heat exchange, thereby improving the cooling effect of the outer cooling tube 23.

As shown in fig. 2, the ventilation mechanism of the present invention includes an air pump 20, a ventilation pipe 21 communicated with the air pump 20, and a plurality of air distribution pipes 22 connected to the ventilation pipe 21 and extending toward the outer cooling pipe 23 and/or the cabinet 201, respectively. According to the actual situation that the outer cooling pipe 23 is coiled on the outer layer of the shell 201, the air distribution pipe 22 is arranged in a targeted manner, so that both the outer cooling pipe 23 and the shell 201 can be blown by cold air blown out by the air distribution pipe 22; wherein, the concrete condition is as follows: if the temperature of the external cooling pipe 23 is lower than the temperature of the air in the air distribution pipe 22, the air distribution pipe 22 can blow the cold air emitted from the external cooling pipe 23 onto the cabinet 201, and the cold air emitted from the external cooling pipe 23 can also cool the air blown out from the air distribution pipe 22, so as to cool the cabinet 201; if the temperature of the external cooling pipe 23 is higher than the temperature of the gas in the gas distribution pipe 22, the gas distribution pipe 22 not only can cool the external cooling pipe 23, but also can cool the casing 201, and finally, cool air is blown to the casing 201; therefore, the mutual cooperation between the outer cooling tube 23 and the gas distribution tube 22 greatly improves the cooling effect.

As shown in fig. 1 and 2, the ventilation mechanism in the present invention includes a protective cover 3 disposed around the casing 201, the protective cover 3 is opened with a plurality of through holes 19, and the outer cooling pipe 23 is wound around the outer side of the protective cover 3. Protective cover 3 can support outer cooling tube 23, strengthens the structural strength of outer cooling tube 23, and secondly, the air conditioning that outer cooling tube 23 surface gived off can pass through protective cover 3's through-hole 19 and blow in the casing surface, cools down casing 201, promotes the cooling effect.

As shown in fig. 1 to 3, the ventilation mechanism in the present invention includes a differential pressure chamber 6, a piston plate 17 located in the differential pressure chamber 6, and a driving assembly drivingly connected to the piston plate 17, and the driving assembly is configured to drive the piston plate 17 to reciprocate in the differential pressure chamber 6 to discharge heat dissipated by the outer cooling pipe 23 and/or the housing 201 to the outside. In the reciprocating motion process of the piston plate 17, the flow rate of the airflow in the differential pressure chamber 6 is changed by changing the air pressure of the differential pressure chamber 6, wherein the air pressure difference is formed on the two sides of the piston plate 17, and the side with larger air pressure can exhaust the air in the differential pressure chamber 6, namely, the side far away from the space of the machine shell 201; the side with smaller air pressure can suck the air around the casing 201 into the differential pressure cavity 6; in the differential pressure change process of the differential pressure chamber 6, the gas at the periphery of the casing 201 is sucked into the differential pressure chamber 6, and then the gas is discharged out of the space far away from the casing 201; therefore, the flowing speed of the air on the surface of the casing 201 is increased, and the heat exchange capability of the casing 201 is improved, so that the heat dissipation function of the casing 201 is improved.

Wherein the temperature T of the surface of the casing 201₁With the flow velocity v of the gas flow in the pressure-difference chamber 6₁Satisfies the following relationship, T₁＝λ·v₁V; λ is the heat dissipation coefficient of the surface of the casing 201, and the value range is 0.48-3.656; t is₁The unit is K; v. of₁The unit is m/s; v is the sectional area of the differential pressure chamber 6 and is given by m²(ii) a The influence of different wind speeds on the temperature of the outside temperature reduction of the shell 201 is different, the heat dissipation coefficient of the surface of the shell 201 and the sectional area of the pressure difference cavity 6 are controlled to be unchanged, when the airflow speed is 0.1-1.2m/s, the speed of the outside temperature reduction of the shell 201 is higher, the airflow speed continues to rise to 1.2-2.0m/s, however, the temperature reduction range of the outside of the shell 201 gradually becomes slower, the airflow speed continues to be improved, and the temperature inside the shell 201 is changedThe temperature reduction amplitude is small in change, and the heat dissipation efficiency is reduced, so that the air flow velocity in the pressure difference cavity 6 is optimal between 1.2m/s and 2.0m/s, the temperature reduction efficiency is highest, and the heat dissipation effect is best.

As shown in fig. 1 to 3 and 5, the ventilation mechanism in the present invention includes a first partition plate 4 and a second partition plate 5 installed outside the outer cooling pipe 23 and forming the differential pressure chamber 6 between the first partition plate 4 and the second partition plate 5, and the first partition plate 4 and the second partition plate 5 are respectively provided with an air opening to allow heat emitted from the outer cooling pipe 23 to sequentially enter the differential pressure chamber 6 through the air opening and to be discharged to the outside. A plurality of air ports are arranged on the first partition plate 4 and the second partition plate 5, and air valves are arranged at the air ports, namely a first air valve 26 and a second air valve 27 on the first partition plate 4, and a third air valve 28 and a fourth air valve 29 on the second partition plate 5, wherein the number of the air valves is not limited and the air valves are arranged according to actual conditions, and the air valves are arranged on two sides outside the motion range of the piston plate 17 so as to control the speed of air flow; the air valve comprises an air door 24 and hinges 25, the air door 24 is rotatably connected to the first partition plate 4 through the hinges 25, the hinges 25 can control the rotating direction of the air door 24 so as to control the direction of gas passing through the air valve, and the hinges 25 have a damping function, so that after a certain air pressure is formed in the pressure difference cavity 6, the air door 24 is rotated to discharge the gas; the surface of the shell 1 is provided with a strip-shaped heat dissipation window 18, the heat dissipation window 18 is communicated with the pressure difference cavity 6, and the position of the air valve on the second partition plate 5 corresponds to the position of the heat dissipation window 18; the positions of the valves on the first partition 4 and the second partition 5 correspond.

When the cam 12 drives the push rod 16 and the piston plate 17 to reciprocate in the differential pressure chamber 6, and when the piston plate 17 moves away from the cam 12, the first air valve 26 is in a closed state under the pressure of air in the differential pressure chamber 6, the second air valve 27 is in an open state under the negative pressure of the air in the differential pressure chamber 6, and meanwhile, the fourth air valve 29 is in a closed state under the action of the negative pressure, and hot air emitted from the casing 201 is accelerated from the second air valve 27 to enter the differential pressure chamber 6; meanwhile, the third damper 28 is exposed to the pressure of the air inside the differential pressure chamber 6, and is opened, and the hot air inside the differential pressure chamber 6 is accelerated to be discharged from the third damper 28 and is discharged outside the casing 1 through the heat radiation window 18. When the piston plate 17 moves close to the cam 12, the second valve 27 is closed by the pressure of the air inside the differential pressure chamber 6, the first valve 26 is opened by the negative pressure of the air inside the differential pressure chamber 6, and the third valve 28 is closed by the negative pressure, so that the hot air emitted from the housing 201 is accelerated from the first valve 26 into the differential pressure chamber 6; meanwhile, the fourth air valve 29 is opened under the pressure of the air inside the differential pressure chamber 6, and the hot air is exhausted from the fourth air valve 29 in an accelerated manner and is rapidly exhausted out of the shell 1 through the heat dissipation window 18, so that the cooling rate is increased.

As shown in fig. 1, 3 and 4, the driving assembly in the present invention includes a base 13 located in the differential pressure chamber 6, a linear chute 14 opened in the base 13, a push rod 16 slidably mounted in the linear chute 14, and a cam 12 drivingly connected to a rotating shaft 11 of the generator, wherein the cam 12 and the push rod 16 cooperate with each other to drive the push rod 16 to drive the piston plate 17 to reciprocate in the differential pressure chamber 6 when the rotating shaft 11 rotates. The driving rotating shaft 11 can be driven by an external motor and also can be driven by a crankshaft 7 of a generator, and the specific principle is as follows: the crankshaft 7 drives the pinion 9 to rotate, the pinion 9 is meshed with the reduction gear 10, so that the rotating shaft 11 rotates, then the cam 12 connected to the rotating shaft 11 drives the push rod 16, the push rod 16 makes reciprocating linear motion in the linear sliding groove 14 of the base 13, the box body 8 can support the crankshaft 7 and the rotating shaft 11, and the support crankshaft 7 and the rotating shaft 11 are in gear transmission in the box body 8, and finally the piston plate 17 is pushed to move in the differential pressure cavity 6; the baffle 15 is arranged in the differential pressure cavity 6, and not only can support the push rod 16 and control the movement direction of the push rod 16, but also can provide a certain supporting force between the first partition plate 4 and the second partition plate 5.

As shown in fig. 6, the generator 2 in the present invention includes the above-described heat dissipation device for a generator. The generator 2 comprises a permanent magnet 203 mounted in the casing 201, a stator mounted in the permanent magnet 203, a plurality of groups of windings 205 embedded on the stator, a rotor 204 mounted in the stator, and a crankshaft 7 mounted at the center of the rotor 204 in a penetrating manner; the power generation principle is as follows: the rotor 204 is driven by the crankshaft 7 to rotate, so that the closed coil does cutting magnetic induction line motion in the secondary field, and current can be generated in the closed coil to generate electricity.

As shown in fig. 1, 2, 6 and 7, an internal cooling channel 202 for allowing the cooling liquid to flow therethrough is formed in the casing 201 according to the present invention. The cross section of the inner cooling channel 202 is in a circular structure, when the inner cooling channel 202 is used for cooling, the temperature of the rotor 204 and the permanent magnet 203 in the casing 201 is reduced along with the increase of the flow velocity of the cooling liquid, and after the temperature is reduced to a certain degree, the flow velocity of the cooling liquid is increased, and the reduction amplitude of the temperature rise is reduced; as can be seen from the above, the temperature T inside the casing 201, the flow velocity v of the cooling liquid of the inner cooling passage 202, and the inner diameter d of the inner cooling passage 202 satisfy: t is alpha.v/d; in the above formula, alpha is a temperature rise coefficient, and the value range is 0.036-0.254; v is in m/s; d is m; the T temperature is K; the cooling liquid with different speeds has different influences on the temperature reduction in the shell 201, the temperature rise coefficient alpha and the diameter of the inner cooling pipe 202 are controlled to be unchanged, when the flow speed of the cooling liquid is 0-0.5m/s, the cooling liquid is in a laminar flow stage, the temperature in the shell 201 is rapidly reduced along with the increase of the flow speed of the cooling liquid, when the flow speed of the cooling liquid is 0.5-0.7m/s, the cooling water enters a turbulent flow stage, the cooling effect is further enhanced, but the temperature reduction range in the shell 201 is gradually reduced, the flow speed of the water is continuously improved, the temperature reduction range in the shell 201 is slightly changed, the heat dissipation efficiency is reduced, and water resources are wasted; therefore, in the present invention, the flow rate of the cooling fluid in the inner cooling passage 202 is preferably 0.5 to 0.7m/s, and the temperature reduction efficiency of the generator 2 is the highest and the heat radiation effect is the best.

The casing 201 is effectively cooled through the internal cooling channel 202, the external cooling pipe 23 and the differential pressure cavity 6, so that the temperature inside the casing 201 is prevented from rising, the generator can work for a long time, and the service life of the generator 2 is prolonged; the three interact has good radiating effect, and if the radiating efficiency is high, the temperature reduces fast, improves the generating performance and the overload capacity of generator, avoids the part of generator to damage because of high temperature.

As shown in fig. 7, the inner cooling channel 202 in the present invention has a spiral shape, and the spiral axis of the inner cooling channel 202 is collinear with the central axis of the casing 201, so that the spiral inner cooling channel 202 can uniformly cool the casing 201.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, numerous simple modifications can be made to the technical solution of the invention, including combinations of the specific features in any suitable way, and the invention will not be further described in relation to the various possible combinations in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.