A flywheel vacuum and cooling integrated system

Abstract

The present invention relates to an integrated flywheel vacuum and cooling system. The vacuum pumping device includes a pump housing, a pump rotor eccentrically mounted in the inner cavity of the pump housing, and a telescopic vane assembly. The pump housing is provided with a first air inlet, a second air inlet, and an air outlet. The telescopic vane assembly includes four telescopic vanes, which divide the inner cavity of the pump housing into four independent air chambers. When the pump rotor drives the telescopic vane assembly to rotate, the vacuum pumping device passes through a vacuuming and exhausting state and an atmospheric suction and exhausting state. In the vacuuming and exhausting state, gas in the flywheel chamber is drawn into the chamber through the first air inlet, and gas drawn from the flywheel chamber is output to an air cooling device through the air outlet. As the air concentration in the flywheel chamber decreases, the system enters an atmospheric suction and exhausting state, sucking in atmospheric air through the second air inlet and outputting atmospheric air through the air outlet to the air cooling device. A vacuum pumping device can realize both vacuuming and auxiliary air cooling functions, has a high degree of integration, and occupies a small space.

Description

Technical Field

[0001] The present invention belongs to the technical field of flywheel energy storage, and in particular relates to a flywheel vacuum and cooling integrated system. Background Art

[0002] The working principle of flywheel energy storage is as follows: when electricity is abundant, the electric energy drives the motor in the flywheel energy storage system, causing the flywheel to rotate at high speed, converting the electrical energy into mechanical energy for storage. When users need electricity, the flywheel slows down and drives the generator to generate electricity for users. This technology has been widely used due to its high energy conversion efficiency, pollution-free operation, easy maintenance, and high energy storage density.

[0003] The flywheel itself is the core component of a flywheel energy storage system. In this field, efforts are underway to increase the rotor's ultimate angular velocity, reduce rotor weight, and maximize the energy storage capacity of a rotating flywheel system. With the application of carbon fiber materials in rotors, the linear velocity of the flywheel rotor's outer edge has reached the speed of sound (340 m / s).

[0004] Conventional systems use a vacuum pump to reduce the air concentration in the rotor cavity, minimizing frictional heat generation during high-speed rotation. This not only improves system efficiency but also ensures stability. Furthermore, as the flywheel rotates, the rotor core, permanent magnets, stator core, and windings all generate heat. This heat is not only dissipated into the atmosphere through the air gap and the outer casing, but also requires a cooling system such as air, water, or hydrogen cooling to remove it.

[0005] The existing cooling system and vacuum system are each independent subsystems, and the entire flywheel energy storage system has low integration and occupies a large space. Summary of the Invention

[0006] The object of the present invention is to provide a flywheel vacuum and cooling integrated system, which can cool the flywheel energy storage device by means of a vacuum pumping system, thereby improving the system integration and reducing the occupied space.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A flywheel vacuum and cooling integrated system includes a flywheel energy storage device, a vacuum pumping device, and an air cooling device; the flywheel energy storage device includes a motor, a flywheel rotor, a flywheel stator, and a flywheel air chamber, and the flywheel rotor is located in the flywheel air chamber;

[0009] The vacuum pumping device includes a pump housing, a pump rotor eccentrically mounted in the inner cavity of the pump housing, and a telescopic vane assembly mounted on the pump rotor. The pump housing is provided with a first air inlet, a second air inlet, and an air outlet. The telescopic vane assembly includes four telescopic vanes, which divide the inner cavity of the pump housing into four independent air chambers. During the process of the pump rotor driving the telescopic vane assembly to rotate, the vacuum pumping device passes through a vacuum exhaust state and an atmospheric intake and exhaust state.

[0010] In a vacuum exhaust state, the gas in the flywheel chamber is drawn into the chamber through the first air inlet, and the gas drawn from the flywheel chamber is output to the air cooling device through the air outlet;

[0011] As the air concentration in the flywheel chamber decreases, the flywheel chamber enters an atmospheric intake and exhaust state, inhaling atmospheric air through the second air inlet and outputting the atmospheric air to the air cooling device through the air outlet.

[0012] As a preferred embodiment, the pump rotor is eccentric toward the X direction, the air outlet is arranged on the X direction side of the pump housing, the first air inlet and the second air inlet are arranged on the side of the pump housing opposite to the X direction, and the first air inlet and the second air inlet correspond to different air chambers.

[0013] As a preferred embodiment, the telescopic rotor includes a sleeve rod with an open outer end, a push rod, and a spring. The sleeve rod is installed on the pump rotor, the push rod is movably arranged in the inner cavity of the sleeve rod, and the spring is telescopically arranged in the inner cavity of the sleeve rod. The push rod is connected to the spring. During the rotation of the pump rotor, the outer ends of the four push rods contact the inner wall of the pump casing to form the four air chambers.

[0014] As a preferred solution, the first air inlet is provided with a first one-way differential pressure valve, and the second air inlet is provided with a second one-way differential pressure valve.

[0015] As a preferred solution, the first air inlet is provided with a first filter screen, and the second air inlet is provided with a second filter screen.

[0016] As a preferred solution, the gas outlet transports the gas to the air cooling device through a gas pipeline.

[0017] As a preferred solution, the first air inlet is connected to the flywheel chamber via an air intake pipe.

[0018] As a preferred solution, the air cooling device includes a cooling circulation pipeline, and the gas output from the gas outlet is transported to the cooling circulation pipeline.

[0019] As a preferred solution, lubricating oil is provided on the outer end of the push rod.

[0020] As a preferred solution, it also includes a water cooling device, which is used to dissipate heat from the flywheel energy storage device.

[0021] The beneficial effect of the flywheel vacuum and cooling integrated system of the present invention is that the vacuum-exhausted gas is used to cool the flywheel energy storage device. When the vacuum degree reaches the requirement, the atmospheric air can be pumped out to continuously air-cool the flywheel energy storage device. One vacuum pumping device can realize the two functions of vacuum pumping and auxiliary air cooling, with high integration and small space occupation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of a flywheel vacuum and cooling integrated system according to an embodiment of the present invention;

[0023] Figure 2 is a cross-sectional view of a vacuum pumping device according to an embodiment of the present invention;

[0024] Figure 3 This is a diagram showing the process changes of the telescopic rotor in an embodiment of the present invention;

[0025] Figure 4 This is a state diagram of the vacuum pumping device according to an embodiment of the present invention in a vacuum exhaust state;

[0026] Figure 5 This is a state diagram of the vacuum pumping device according to an embodiment of the present invention in the state of sucking in and exhausting the atmosphere.

[0027] The names and numbers of the components in the figure are as follows:

[0028] Flywheel energy storage device 10, flywheel rotor 11, flywheel stator 12, flywheel air chamber 13, vacuum pumping device 20, base 201, pump housing 21, telescopic rotor 22, sleeve rod 221, push rod 222, spring 223, first air inlet 23, second air inlet 24, air outlet 25, first one-way differential pressure valve 261, second one-way differential pressure valve 262, first filter 271, second filter 272, air intake pipe 281, air delivery pipe 282, pump rotor 29, water cooling device 30, water tank 31, water pump 32, radiator 33, fan 34, circulating water pipe 35. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0030] like Figure 1 and Figure 2As shown, this embodiment discloses a flywheel vacuum and cooling integrated system. The flywheel vacuum and cooling integrated system includes a flywheel energy storage device 10, a vacuum pumping device 20, and an air cooling device. The flywheel energy storage device 10 includes a motor, a flywheel rotor 11, a flywheel stator 12, and a flywheel chamber 13. The flywheel rotor 11 is located in the flywheel chamber 13.

[0031] The vacuum pumping device 20 includes a pump housing 21, a pump rotor 29 eccentrically mounted in the inner cavity of the pump housing 21, and a telescopic vane assembly mounted on the pump rotor 29. The pump housing 21 is provided with a first air inlet 23, a second air inlet 24, and an air outlet 25. The telescopic vane assembly includes four telescopic vanes 22, which divide the inner cavity of the pump housing 21 into four independent air chambers. The first air inlet 23 is connected to the flywheel air chamber 13, the second air inlet 24 is used to take in the atmosphere, and the gas output from the air outlet 25 is delivered to the air cooling device to cool the flywheel energy storage device 10. During the process of the pump rotor 29 driving the telescopic vane assembly to rotate, the vacuum pumping device 20 passes through a vacuum exhaust state and an atmospheric intake and exhaust state.

[0032] In the vacuum exhaust state, the gas in the flywheel chamber 13 is drawn into the chamber through the first air inlet 23, and the gas drawn from the flywheel chamber 13 is output to the air cooling device through the air outlet 25;

[0033] As the air concentration in the flywheel chamber 13 decreases, it enters an atmospheric intake and exhaust state, inhaling the atmosphere through the second air inlet 24 and outputting the atmosphere to the air cooling device through the air outlet 25 .

[0034] This embodiment saves energy by using the de-vacuumed gas to cool the flywheel energy storage device 10. When the required vacuum level is reached, atmospheric air can be pumped in to continuously cool the flywheel energy storage device 10. This primarily cools the motor. When the required vacuum level is reached, atmospheric air can be pumped in to continuously cool the motor. A single vacuum pump 20 can perform both vacuuming and auxiliary cooling functions, resulting in high integration and minimal space requirements.

[0035] This embodiment reduces the number of system components and the amount of control required for the entire system. Controlling one vacuum pumping device 20 can achieve two functions.

[0036] This embodiment can solve the problem of dispersed cooling devices and low concentration of cooling devices configured in flywheel energy storage devices, reduce occupied space, and facilitate electrical control of the system.

[0037] As a preferred solution, the first air inlet 23 is provided with a first one-way differential pressure valve 261 , and the second air inlet 24 is provided with a second one-way differential pressure valve 262 .

[0038] The vacuum pump 20 of this embodiment is a variable volume vacuum air pump, which includes a base 201 . The second air inlet 24 of this embodiment is close to the base 201 .

[0039] As a preferred solution, the pump rotor 29 is eccentric toward the X direction, the air outlet 25 is arranged on the X direction side of the pump housing 21, the first air inlet 23 and the second air inlet 24 are arranged on the side of the pump housing 21 opposite to the X direction, and the first air inlet 23 and the second air inlet 24 correspond to different air chambers.

[0040] like Figure 3 As shown, as a preferred embodiment, the telescopic rotor 22 includes a sleeve rod 221 with an open outer end, a push rod 222, and a spring 223. The sleeve rod 221 is mounted on the pump rotor 29, the push rod 222 is movably disposed within the inner cavity of the sleeve rod 221, and the spring 223 is telescopically disposed within the inner cavity of the sleeve rod 221. The push rod 222 and the spring 223 are connected. During the rotation of the pump rotor 29, due to the action of centrifugal force, the outer ends of the four push rods 222 contact the inner wall of the pump housing 21, forming four air chambers, namely, air chamber a, air chamber b, air chamber c, and air chamber d. Air chambers a, air chamber b, air chamber c, and air chamber d are not connected to each other.

[0041] In process 1, the spring 223 is in the maximum compression state, and the length of the push rod 222 is the shortest. The distance from the inner end of the spring 223 to the outer end of the push rod 222 is the radius R of the pump rotor 29.

[0042] In process 3, the spring 223 is in the maximum stretched state, and the push rod 222 extends the longest. The distance from the inner end of the spring 223 to the outer end of the push rod 222 is the radius R of the pump rotor 29 plus the eccentricity d of the pump rotor 29.

[0043] As a preferred solution, lubricating oil is provided at the outer end of the push rod 222 to reduce friction between the push rod 222 and the pump housing 21 .

[0044] The first one-way differential pressure valve 261 and the second one-way differential pressure valve 262 are both differential pressure valves with check valves. When the upstream pressure is greater than the downstream pressure, the upstream gas will flow downstream. When the downstream pressure is greater than the upstream pressure, the differential pressure valve has a check function and the airflow cannot flow back.

[0045] Figure 4 This is a state diagram of the vacuum pumping device according to an embodiment of the present invention in a vacuum exhaust state; Figure 5 This is a state diagram of the vacuum pumping device according to an embodiment of the present invention in the state of sucking in and exhausting the atmosphere.

[0046] like Figure 4As shown, when the vacuum pump 20 is initially operational, the flywheel chamber 13 is at standard atmospheric pressure. As the pump rotor 29 rotates with the telescopic vane assembly, chamber a approaches a vacuum state. When the pump rotor 29 rotates to the first air inlet 23, the first one-way differential pressure valve 261 opens, allowing the gas within the flywheel chamber 13 to enter chamber a. The pump rotor 29, with the telescopic vane assembly, continues to rotate, and this gas is eventually discharged through the air outlet 25 to the air cooling device. The gas within chamber c is fluid and slightly above atmospheric pressure, and the second one-way differential pressure valve 262 at the second air inlet 24 is closed.

[0047] like Figure 5 As shown, as the pump rotor 29 continues to rotate with the telescopic vane assembly, when the pressure at the second air inlet 24 is less than the atmospheric pressure, the second one-way differential pressure valve 262 opens. At this time, the air in the flywheel chamber 13 is already relatively thin and insufficient to provide wind for cooling the flywheel motor. Therefore, the second air inlet 24 draws the outside atmosphere into the air chamber. As the pump rotor 29 and the telescopic vane assembly continue to rotate, the air in the flywheel chamber 13 reaches the vacuum requirement, and the extracted outside atmosphere is discharged from the air outlet 25 to the air cooling device. As the pump rotor 29 and the telescopic vane assembly continue to rotate, the first one-way differential pressure valve 261 of the first air inlet 23 is in a closed state, ensuring that the flywheel chamber 13 is in a vacuum state. The outside atmosphere continues to enter the air chamber and is discharged from the air outlet 25 to the air cooling device, continuously cooling the flywheel energy storage device 10.

[0048] In the state of absorbing and exhausting atmosphere, before the flywheel chamber 13 reaches a vacuum state, the air in the flywheel chamber 13 is also discharged to the air cooling device through the air outlet 25 .

[0049] As a preferred solution, the first air inlet 23 is provided with a first filter 271, and the second air inlet 24 is provided with a second filter 272. Such a configuration can prevent impurities from entering the vacuum device 20, thereby extending the service life of the vacuum device 20.

[0050] As a preferred solution, the gas outlet 25 delivers the gas to the air cooling device through the gas pipeline 282.

[0051] As a preferred solution, the first air inlet 23 is connected to the flywheel chamber 13 via an air intake pipe 281 .

[0052] As a preferred solution, the air cooling device includes a cooling circulation pipeline, and the gas output from the gas outlet 25 is transported to the cooling circulation pipeline.

[0053] like Figure 1As shown, as a preferred embodiment, the integrated flywheel vacuum and cooling system also includes a water cooling device 30, which is used to dissipate heat from the flywheel energy storage device. This embodiment combines air cooling with water cooling to improve the heat dissipation of the flywheel energy storage device. This can increase the cooling effect of the motor and make the motor temperature more uniform.

[0054] Specifically, the water cooling device 30 includes a water tank 31, a water pump 32, a radiator 33, a fan 34, and a circulating water pipe 35. The water in the water tank 31 passes through the water pump 32 and the circulating water pipe 35 to cool the flywheel energy storage device 10.

[0055] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A flywheel vacuum and cooling integrated system, characterized in that: The flywheel energy storage device (10) comprises a flywheel energy storage device (10), a vacuum pumping device (20), and an air cooling device; the flywheel energy storage device (10) comprises a motor, a flywheel rotor (11), a flywheel stator (12), and a flywheel air chamber (13); the flywheel rotor (11) is located in the flywheel air chamber (13); The vacuum pumping device (20) comprises a pump housing (21), a pump rotor (29) eccentrically mounted in the inner cavity of the pump housing (21), and a telescopic vane assembly mounted on the pump rotor (29); the pump housing (21) is provided with a first air inlet (23), a second air inlet (24), and an air outlet (25); the telescopic vane assembly comprises four telescopic vanes (22), and the four telescopic vanes (22) divide the inner cavity of the pump housing (21) into four independent air chambers; in the process of the pump rotor (29) driving the telescopic vane assembly to rotate, the vacuum pumping device (20) passes through a vacuum exhaust state and an atmospheric intake and exhaust state; The pump rotor (29) is eccentric toward the X direction, the air outlet (25) is arranged on the X direction side of the pump housing (21), the first air inlet (23) and the second air inlet (24) are arranged on the side of the pump housing (21) opposite to the X direction, and the first air inlet (23) and the second air inlet (24) correspond to different air chambers; the first air inlet (23) is provided with a first one-way differential pressure valve (261), and the second air inlet (24) is provided with a second one-way differential pressure valve (262); In the vacuum exhaust state, the gas in the flywheel chamber (13) is drawn into the chamber through the first air inlet (23), and the gas drawn from the flywheel chamber (13) is output to the air cooling device through the air outlet (25); as the air concentration in the flywheel chamber (13) decreases, the state of sucking in and exhausting air is entered, and the atmosphere is sucked in through the second air inlet (24) and output to the air cooling device through the air outlet (25).

2. The flywheel vacuum and cooling integrated system according to claim 1, characterized in that: The telescopic rotor (22) includes a sleeve rod (221) with an open outer end, a push rod (222), and a spring (223). The sleeve rod (221) is mounted on the pump rotor (29). The push rod (222) is movably arranged in the inner cavity of the sleeve rod (221). The spring (223) is telescopically arranged in the inner cavity of the sleeve rod (221). The push rod (222) is connected to the spring (223). During the rotation of the pump rotor (29), the outer ends of the four push rods (222) contact the inner wall of the pump housing (21) to form the four air chambers.

3. The flywheel vacuum and cooling integrated system according to claim 1, characterized in that: The first air inlet (23) is provided with a first filter (271), and the second air inlet (24) is provided with a second filter (272).

4. The flywheel vacuum and cooling integrated system according to claim 1, characterized in that: The gas outlet (25) delivers the gas to the air cooling device through a gas delivery pipeline (282).

5. The flywheel vacuum and cooling integrated system according to claim 1, characterized in that: The first air inlet (23) is connected to the flywheel chamber (13) via an air inlet pipe (281).

6. The flywheel vacuum and cooling integrated system according to claim 1, characterized in that: The air cooling device comprises a cooling circulation pipeline, and the gas output from the gas outlet (25) is delivered to the cooling circulation pipeline.

7. The flywheel vacuum and cooling integrated system according to claim 2, characterized in that: The outer end of the push rod (222) is provided with lubricating oil.

8. The flywheel vacuum and cooling integrated system according to claim 1, characterized in that: It also includes a water cooling device (30), which is used to dissipate heat from the flywheel energy storage device.

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