Inner oil cooling double-stator hydroelectric generator

Abstract

The invention relates to the technical field of hydroelectric generators, in particular to an inner oil cooling double-stator hydroelectric generator which comprises a motor support, a motor shell is fixedly connected to the top of the motor support, a stator and a rotor are installed in the motor shell, and an oil cooling assembly is fixedly connected to the top of the inner side of the motor shell. The top of the motor shell is provided with two oil pipe joints communicated with the two ends of the oil cooling assembly respectively. The two ends of the arc-shaped frame are fixedly connected with the inner wall of the motor shell, the axis of the arc-shaped frame is located below the arc-shaped frame, the two oil pipe joints are communicated with the two ends of the arc-shaped frame respectively, a plurality of metal balls are slidably connected to the bottom of the inner side of the arc-shaped frame, and traction ropes are fixedly connected between the metal balls. The problems that before cooling oil of an existing hydroelectric generator is filtered, part of impurities can settle in a cooling oil pipeline of the hydroelectric generator, the cooling effect on the hydroelectric generator is easily reduced, and the cleaning difficulty is large due to the fact that the impurities are located in the hydroelectric generator are solved.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic generators, in particular to an internal oil-cooled double-stator hydraulic generator. Background Art

[0002] The hydropower station uses river water to drive the turbine, and then drives the generator to generate electricity. Heat is generated in the process of power generation. In order to maintain the stable operation of the generator, oil cooling equipment will be equipped. After searching, the Chinese invention patent with application number CN202410895586.6 discloses a dual-voltage motor stator structure and a vehicle-mounted generator. Cooling gas can be introduced into the heat dissipation channel through the air intake cylinder, and cooling liquid can be introduced into the heat dissipation channel through the liquid intake cylinder. The cooling gas and cooling liquid can cope with different heat generation and improve the stability of the vehicle-mounted generator.

[0003] The above device does not have the cooling oil filtering function. Although the cooling oil of the hydroelectric generator is filtered by a filter during the circulation process, impurities will still be generated when the cooling oil flows into the filter inside the generator. These impurities will settle in the cooling oil pipeline of the generator before being filtered, which will not only reduce the cooling effect of the generator, but also make it difficult to clean the impurities settled inside the generator. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an internal oil-cooled double-stator hydroelectric generator, which solves the problem that some impurities in the cooling oil of the existing hydroelectric generator will settle in the cooling oil pipeline of the generator before filtering, which easily reduces the cooling effect of the hydroelectric generator, and the impurities inside the generator make cleaning difficult.

[0005] To achieve the above object, the present invention provides the following technical solution: an internal oil-cooled double-stator hydroelectric generator, comprising a motor bracket, the top of the motor bracket is fixedly connected to a motor housing, a stator and a rotor are installed inside the motor housing, an oil cooling assembly is fixedly connected to the inner top of the motor housing, and two oil pipe joints are provided on the top of the motor housing, which are respectively connected to the two ends of the oil cooling assembly; The oil cooling assembly includes an arc-shaped frame with both ends fixedly connected to the inner wall of the motor housing and an axis below it, two oil pipe joints are respectively connected to the two ends of the arc-shaped frame, a plurality of metal balls are slidably connected to the inner bottom of the arc-shaped frame, a traction rope is fixedly connected between the plurality of metal balls, both ends of the arc-shaped frame are equipped with lateral adjustment assemblies for adjusting the movement of the two ends of the traction rope along the width of the arc-shaped frame, and a buoyancy assembly for reducing the squeezing force between the metal balls and the arc-shaped frame is installed at the bottom of the arc-shaped frame.

[0006] Preferably, the lateral adjustment assembly includes metal rods with both ends movably extending to the outside of the arc frame, and both ends of the traction rope are fixedly connected to the two metal rods respectively, and both ends of the metal rods are fixedly connected to handles.

[0007] Preferably, a sleeve is fixedly connected to the middle of the metal rod, the diameter of the sleeve gradually increases from the middle to both ends, and the traction rope is fixedly connected to the sleeve.

[0008] Preferably, rubber pads corresponding to the metal rods are fixedly connected to both sides of the inner wall of the arc-shaped frame, and the metal rods movably penetrate the rubber pads.

[0009] Preferably, the buoyancy assembly includes a gas delivery frame installed at the bottom of the arc frame, a jet pipe corresponding to the metal ball is connected between the gas delivery frame and the arc frame, a trachea joint is installed on one side of the motor housing, and a bent pipe is connected between the gas delivery frame and the trachea joint.

[0010] Preferably, both ends of the gas delivery frame are fixedly connected with bending frames, the bending frames are slidably connected to the bottom of the arc frame, and the bottom of the bending frames is provided with a bolt with one end movably extending into the interior of the arc frame.

[0011] Preferably, one end of the arc frame is connected to a slag discharge pipe, one end of the slag discharge pipe extends to the outside of the motor housing and is installed with a valve.

[0012] Preferably, the number of the stator and the number of the rotor are both two, the two ends of the motor housing are respectively fixedly connected with the front cover and the rear cover, the two ends of the rotor shaft are respectively movable through the front cover and the rear cover, and an electrical box is installed on the top of the motor housing.

[0013] Compared with the prior art, the present invention provides an internal oil-cooled double-stator hydraulic generator, which has the following beneficial effects: 1. The oil cooling assembly is set up to guide the impurities in the cooling oil inside the generator to move and gather toward one end of the arc frame by scraping the metal ball and the shape of the arc frame, so as to clean the impurities settled inside the generator and facilitate the centralized cleaning of the impurities, thereby preventing some impurities from settling in the cooling oil pipeline of the generator before filtering the cooling oil, reducing the cooling effect of the hydroelectric generator, and reducing the difficulty of cleaning the impurities in the cooling oil settled inside the generator.

[0014] 2. Through the transverse adjustment component, the traction rope and the metal balls obliquely cover the entire width of the arc frame. When the metal balls are pushed and moved by the flowing cooling oil, all the metal balls are driven to move over the entire width of the arc frame, thereby expanding the cleaning area of ​​the cooling oil pipeline inside the generator and enhancing the cleaning effect of the impurities settled inside the generator.

[0015] 3. The buoyancy component not only directly pushes the metal ball at the bottom of the inner side of the arc frame upward, but also pushes the cooling oil at the bottom of the inner side of the arc frame to generate bubbles and diffuse to the outer circle. The diffusion of the cooling oil is used to further push the metal ball upward, thereby reducing the squeezing force of the metal ball on the bottom of the inner side of the arc frame due to the weight of the metal ball. Due to the reduction of the contact pressure between the metal ball and the arc frame and the lubrication of the cooling oil, the amplitude of the vibration generated during friction is also reduced, which can reduce the vibration generated when cleaning the arc frame, reduce the shaking and noise of the generator, and make the working process of the generator more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings: Figure 1 It is a schematic diagram of the overall structure of the generator of the present invention; Figure 2 is a partial cutaway view of the generator of the present invention; Figure 3 It is a structural schematic diagram of the oil cooling assembly of the present invention; Figure 4 A partial cutaway view of the oil cooling assembly of the present invention; Figure 5 It is a schematic diagram of the structure of the internal components of the arc frame of the present invention; Figure 6 It is a schematic structural diagram of the buoyancy assembly of the present invention.

[0017] In the figure: 1. motor bracket; 2. motor housing; 3. stator; 4. rotor; 5. oil cooling assembly; 51. arc frame; 52. metal ball; 53. traction rope; 54. lateral adjustment assembly; 541. metal rod; 542. handle; 55. buoyancy assembly; 551. gas delivery frame; 552. jet pipe; 553. gas pipe joint; 554. bending pipe; 6. oil pipe joint; 7. sleeve; 8. rubber pad; 9. bending frame; 10. bolt; 11. slag discharge pipe; 12. valve; 13. front cover; 14. rear cover; 15. electrical box. DETAILED DESCRIPTION

[0018] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0019] Embodiment 1

[0020] In order to prevent the impurities in the cooling oil from settling inside the hydroelectric generator, which would reduce the flow rate of the cooling oil inside the hydroelectric generator and ultimately reduce the water cooling effect of the hydroelectric generator, Figure 1-Figure 4 As one embodiment of the present invention, an internal oil-cooled double-stator hydroelectric generator is proposed, comprising a motor bracket 1, a motor housing 2 is fixedly connected to the top of the motor bracket 1, a stator 3 and a rotor 4 are installed inside the motor housing 2, an oil cooling assembly 5 is fixedly connected to the inner top of the motor housing 2, two oil pipe joints 6 are provided on the top of the motor housing 2, which are respectively connected to the two ends of the oil cooling assembly 5, the oil cooling assembly 5 comprises an arc frame 51 whose two ends are fixedly connected to the inner wall of the motor housing 2 and the axis is below the arc frame 51, the two oil pipe joints 6 are respectively connected to the two ends of the arc frame 51, a plurality of metal balls 52 are slidably connected to the inner bottom of the arc frame 51, and the plurality of metal balls 5 2 is fixedly connected with a traction rope 53, and both ends of the arc frame 51 are equipped with lateral adjustment components 54 for adjusting the movement of both ends of the traction rope 53 along the width of the arc frame 51. The bottom of the arc frame 51 is equipped with a buoyancy component 55 for reducing the squeezing force between the metal ball 52 and the arc frame 51. When in use, the cooling oil enters the arc frame 51 through the oil pipe joint 6 at one end, cools the hydroelectric generator in the arc frame 51, and then is discharged from the arc frame 51 and the motor housing 2 from the oil pipe joint 6 at the other end. The discharged cooling oil re-enters the arc frame 51 for recycling after being cooled and filtered. The specific process of cleaning impurities inside the arc frame 51 is as follows: The traction rope 53 is in a relaxed state, and the cooling oil flowing in the arc frame 51 pushes the metal ball 52 to move. The metal ball 52 pushed by the cooling oil drives the nearby metal balls 52 to move through the traction rope 53. During the movement, the metal ball 52 rubs against the inner bottom of the arc frame 51, scraping the impurities settled on the inner bottom of the arc frame 51. At the same time, the flowing cooling oil pushes the impurities inside the arc frame 51 to move toward one end. The shape of the arc frame 51 can also make the impurities settled on the inner bottom move from the middle to both ends. The scraping of the metal ball 52 and the shape of the arc frame 51 are used to guide the impurities in the cooling oil inside the generator to move and gather at one end of the arc frame 51, which has a cleaning effect on the impurities settled inside the generator, making it convenient to clean up the impurities in a centralized manner, thereby preventing some impurities from settling in the cooling oil pipeline of the generator before filtering the cooling oil, reducing the cooling effect of the hydroelectric generator, and reducing the difficulty of cleaning the cooling oil impurities settled inside the generator.

[0021] In order to facilitate the staff to centrally clean the cooling oil impurities accumulated inside the generator, refer to Figure 3 One end of the arc frame 51 is connected to a slag discharge pipe 11, one end of the slag discharge pipe 11 extends to the outside of the motor housing 2 and is installed with a valve 12. When it is necessary to clean the cooling oil impurities inside the generator, the staff opens the valve 12, and the cooling oil impurities concentrated at one end of the arc frame 51 near the slag discharge pipe 11 are discharged through the slag discharge pipe 11, and then the staff closes the valve, which is convenient for the staff to clean the cooling oil impurities accumulated inside the generator.

[0022] In order to improve the working efficiency of the hydroelectric generator, refer to Figure 2 There are two stators 3 and two rotors 4, and the two ends of the motor housing 2 are fixedly connected with a front cover 13 and a rear cover 14 respectively. The two ends of the rotating shaft of the rotor 4 are movable through the front cover 13 and the rear cover 14 respectively. An electrical box 15 is installed on the top of the motor housing 2. When in use, the double stator 3 has a compact structure and can more efficiently utilize the magnetic field interaction force to provide a more stable power output; the internal circulation oil cooling can better cool the stator 3 and the rotor 4 of the motor.

[0023] Embodiment 2

[0024] In order to improve the cleaning effect of the metal ball 52 on the impurities settled at the bottom of the inner side of the arc frame 51, refer to Figure 1-Figure 5 On the basis of the first embodiment, the lateral adjustment component 54 includes a metal rod 541 with both ends movably extending to the outside of the arc frame 51, and the two ends of the traction rope 53 are respectively fixedly connected to the two metal rods 541, and the two ends of the metal rod 541 are fixedly connected with a grip 542, and the middle of the metal rod 541 is fixedly connected with a sleeve 7, and the diameter of the sleeve 7 gradually increases from the middle to the two ends. The traction rope 53 is fixedly connected to the sleeve 7, and the inner wall of the arc frame 51 is fixedly connected with a rubber pad 8 corresponding to the metal rod 541 on both sides, and the metal rod 541 movably penetrates the rubber pad 8. When in use, the staff holds the grip 542 and pulls the metal rod 541 along the width direction of the arc frame 51, and the depression on the sleeve 7 It plays the role of limiting the traction rope 53 to prevent the traction rope 53 tied to the sleeve 7 from falling off the sleeve 7, and the rubber pad 8 increases the sealing between the metal rod 541 and the arc frame 51 to prevent the cooling oil in the arc frame 51 from leaking out from the gap between the metal rod 541 and the arc frame 51, until the two ends of the traction rope 53 are close to the two sides of the arc frame 51 respectively, the traction rope 53 and the metal ball 52 obliquely cover the entire width of the arc frame 51, and when the metal ball 52 is pushed and moved by the flowing cooling oil, all the metal balls 52 are driven to move on the entire width of the arc frame 51, thereby expanding the cleaning area of ​​the cooling oil pipeline inside the generator, and can enhance the cleaning effect of the impurities settled inside the generator.

[0025] Embodiment 3

[0026] Since the metal ball 52 is easily pushed by the flowing cooling oil to cause the generator to shake and generate noise, in order to solve this problem, refer to Figure 1-Figure 6On the basis of the first embodiment, the buoyancy assembly 55 includes a gas delivery frame 551 installed at the bottom of the arc frame 51, and an injection pipe 552 corresponding to the metal ball 52 is connected between the gas delivery frame 551 and the arc frame 51. A gas pipe joint 553 is installed on one side of the motor housing 2, and a bending pipe 554 is connected between the gas delivery frame 551 and the gas pipe joint 553. When in use, the gas pipe joint 553 is connected to the gas pipeline to continuously deliver gas to the inside of the gas delivery frame 551 to maintain the high-pressure environment inside the gas delivery frame 551 and prevent the cooling oil in the arc frame 51 from flowing into the gas delivery frame 551 from the injection pipe 552. In order to ensure the air pressure in the gas delivery frame 551, a barometer can be installed inside the gas delivery frame 551 to facilitate the staff to monitor the gas delivery frame 551. The air pressure of the inner part of the arc frame 51 is measured. Since the barometer is a common device in this field, the barometer is not further described in this application. The gas ejected from the jet pipe 552 is ejected from the bottom of the arc frame 51, which not only directly pushes the metal ball 52 at the bottom of the inner side of the arc frame 51 upward, but also pushes the cooling oil at the bottom of the inner side of the arc frame 51 to generate bubbles and diffuse to the outer circle. The diffusion of the cooling oil is used to further push the metal ball 52 upward, thereby reducing the squeezing force of the metal ball 52 on the bottom of the inner side of the arc frame 51 due to the weight of the metal ball 52. Due to the reduction of the contact pressure between the metal ball 52 and the arc frame 51 and the lubrication of the cooling oil, the amplitude of the vibration generated during friction is also reduced, which can reduce the vibration generated when cleaning the arc frame 51, reduce the shaking and noise of the generator, and make the working process of the generator more stable.

[0027] The gas input from the buoyancy assembly 55 is used to assist in accelerating the flow of the cooling oil inside the arc frame 51 and to increase the thrust on the settled impurities, thereby better cooling the generator and concentrating the impurities in the cooling oil.

[0028] In order to strengthen the connection between the buoyancy assembly 55 and the arc frame 51, refer to Figure 6 Both ends of the gas delivery frame 551 are fixedly connected with a bending frame 9, and the bending frame 9 is slidably connected to the bottom of the arc frame 51. The bottom of the bending frame 9 is provided with a bolt 10 with one end movably extending into the inside of the arc frame 51. When in use, the bolt 10 is used to fix the bending frame 9 to the bottom of the arc frame 51, and the buoyancy component 55 is fixed from both ends, thereby improving the firmness of the connection between the buoyancy component 55 and the arc frame 51.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An internal oil-cooled double-stator hydraulic generator, comprising a motor bracket (1), the top of the motor bracket (1) being fixedly connected to a motor housing (2), the inside of the motor housing (2) being provided with a stator (3) and a rotor (4), characterized in that: An oil cooling assembly (5) is fixedly connected to the inner top of the motor housing (2), and two oil pipe joints (6) are provided on the top of the motor housing (2) and are respectively connected to two ends of the oil cooling assembly (5); The oil cooling assembly (5) comprises an arc frame (51) whose two ends are fixedly connected to the inner wall of the motor housing (2) and whose axis is below the arc frame (51); two oil pipe joints (6) are respectively connected to the two ends of the arc frame (51); a plurality of metal balls (52) are slidably connected to the inner bottom of the arc frame (51); a traction rope (53) is fixedly connected between the plurality of metal balls (52); a lateral adjustment assembly (54) for adjusting the movement of the two ends of the traction rope (53) along the width of the arc frame (51) is installed at both ends of the arc frame (51); and a buoyancy assembly (55) for reducing the squeezing force between the metal balls (52) and the arc frame (51) is installed at the bottom of the arc frame (51).

2. The internal oil-cooled double-stator hydraulic generator according to claim 1, characterized in that: The lateral adjustment assembly (54) comprises metal rods (541) with both ends movably extending to the outside of the arc-shaped frame (51), the two ends of the traction rope (53) are respectively fixedly connected to the two metal rods (541), and the two ends of the metal rods (541) are fixedly connected to handles (542).

3. The internal oil-cooled double-stator hydraulic generator according to claim 2, characterized in that: A sleeve (7) is fixedly connected in the middle of the metal rod (541), the diameter of the sleeve (7) gradually increases from the middle to both ends, and the traction rope (53) is fixedly connected to the sleeve (7).

4. The internal oil-cooled double-stator hydraulic generator according to claim 2, characterized in that: Both sides of the inner wall of the arc-shaped frame (51) are fixedly connected with rubber pads (8) corresponding to the metal rod (541), and the metal rod (541) movably penetrates the rubber pads (8).

5. The internal oil-cooled double-stator hydraulic generator according to claim 1, characterized in that: The buoyancy assembly (55) comprises a gas delivery frame (551) mounted at the bottom of the arc-shaped frame (51); an air jet pipe (552) corresponding to the metal ball (52) is connected between the gas delivery frame (551) and the arc-shaped frame (51); an air pipe joint (553) is mounted on one side of the motor housing (2); and a bent pipe (554) is connected between the gas delivery frame (551) and the air pipe joint (553).

6. The internal oil-cooled double-stator hydraulic generator according to claim 5, characterized in that: Both ends of the gas delivery frame (551) are fixedly connected to a bending frame (9), the bending frame (9) is slidably connected to the bottom of the arc frame (51), and the bottom of the bending frame (9) is provided with a bolt (10) with one end movably extending into the interior of the arc frame (51).

7. The internal oil-cooled double-stator hydraulic generator according to claim 1, characterized in that: One end of the arc-shaped frame (51) is connected to a slag discharge pipe (11), and one end of the slag discharge pipe (11) extends to the outside of the motor housing (2) and is provided with a valve (12).

8. The internal oil-cooled double-stator hydraulic generator according to claim 1, characterized in that: The number of the stator (3) and the number of the rotor (4) are both two, the two ends of the motor housing (2) are respectively fixedly connected to the front cover (13) and the rear cover (14), the two ends of the rotating shaft of the rotor (4) are respectively movable through the front cover (13) and the rear cover (14), and the top of the motor housing (2) is installed with an electrical box (15).

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