Ventilation model device of high-rotating-speed hydraulic generator

Abstract

The invention relates to the technical field of hydro-generator manufacturing, in particular to a high-rotating-speed hydro-generator ventilation model device which comprises a rotor assembly, the rotor assembly is arranged in a stator assembly in a penetrating mode, the rotor assembly comprises a rotating shaft, the rotating shaft is arranged in a supporting assembly in a penetrating mode, and the two ends of the rotating shaft are connected with a motor assembly and a braking assembly respectively. According to the application, the size of the real high-rotating-speed hydraulic generator is reduced according to a certain proportion, the flow field characteristics in the overflowing flow channels are also kept consistent with the real machine, the overall flow field state of the high-rotating-speed hydraulic generator can be reflected, an important guiding function is played in research of the ventilation problem, and a basis is provided for verification and optimization of a ventilation system.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogenerator manufacturing, and particularly relates to a ventilation model device for a high-speed hydrogenerator. Background Art

[0002] A hydrogenerator is a mechanical and electrical device that converts water energy into electrical energy. During the energy conversion process, a part of the lost energy is converted into heat energy, which will cause the temperature of the heating components to rise, accelerate the aging of the insulation, and even cause accidents in severe cases, endangering the safe production of the power plant. Therefore, the ventilation system of the hydrogenerator needs to be carefully designed to control the temperature rise of the generator within the allowable range. Due to the high speed and slender size of the high-speed hydrogenerator, the ventilation and cooling conditions are worse than those of conventional hydrogenerator sets, and the design difficulty of the ventilation system is greater.

[0003] When designing the ventilation system of a hydrogenerator, ventilation calculations will be carried out. Since the structure and flow pattern of the ventilation system itself are extremely complex, it is necessary to simplify the analysis object according to experience and set corresponding calculation parameters during the calculation. However, because the ventilation system of the high-speed hydrogenerator has a higher speed and a more slender size than that of a general hydrogenerator, the internal fluid flow state changes more violently, and there is a problem of insufficient calculation accuracy when applying the previous calculation methods and experience to the calculation of the ventilation system of the high-speed hydrogenerator. In order to accurately grasp the flow state of the ventilation system, in addition to carrying out ventilation calculations, it is necessary to establish a ventilation model device with a ventilation structure similar to that of the actual machine and a flow field boundary similar to that of the actual machine to simulate the flow field characteristics of the actual machine, so as to play an important guiding role in the research of ventilation problems and provide a basis for verifying and optimizing the ventilation system.

[0004] The invention application with the publication number of CN 108318817 A in the Chinese patent discloses a simulation test device for the ventilation and heat generation of a hydrogenerator rotor, which is composed of a rotor model, a stator model, a large fan, a small fan, and a sealing component. This invention simulates the structure and flow field characteristics of the hydrogenerator, establishes a test platform for comparing and inspecting the cooling methods of the hydrogenerator rotor, and compares the influence of different air volumes and air volume distributions on the rotor temperature rise by forcibly adjusting the flow rate in the ventilation pipe by the fan. The above-mentioned hydrogenerator rotor ventilation and heat generation test device disclosed in the invention application is not conducive to studying the flow field characteristics of the whole hydrogenerator under the normal operating state, that is, the rotor rotation state, and the actual cooling flow rate passing through the rotor, because only a 1 / 4 model of the whole is established and all components are stationary. Summary of the Invention

[0005] Aiming at the problems in the prior art, the present application proposes a ventilation model device for a high-speed hydrogenerator, which can reflect the overall flow field characteristics of the actual hydrogenerator under the normal operating state, and has a compact structure and reliable connection.

[0006] To achieve the above technical effects, the present application proposes a high-speed hydro-generator ventilation model device, including a rotor assembly, the rotor assembly is arranged in the stator assembly, the rotor assembly includes a rotating shaft, the rotating shaft is arranged in the support assembly, and both ends of the rotating shaft are respectively connected to the motor assembly and the braking assembly.

[0007] The rotating shaft is horizontally arranged, the middle part of the rotating shaft is arranged through the rotor assembly, the rotor assembly is placed inside the stator assembly, both ends of the rotating shaft are respectively fixedly connected to the motor assembly and the braking assembly, the motor assembly is used to drive the rotating shaft to rotate, the braking assembly is used to brake the rotating shaft, and on the rotating shaft, a support assembly is arranged at the position between the rotor and the motor assembly and the braking assembly, and the support assembly provides support for the rotating shaft.

[0008] The rotating shaft is connected to the yoke through a yoke key, and the yoke is provided with a number of magnetic poles.

[0009] The yoke is formed by fastening a number of yoke plates through bolts, and among the number of yoke plates, there are ventilation groove yoke plates. There are ventilation groove yoke plates among the yoke plates, and a yoke ventilation duct is formed between each yoke plate.

[0010] A number of dovetail keys are arranged on the outer peripheral side of the yoke, the magnetic poles are fixedly connected to the dovetail keys through bolts, windshields are arranged on both end faces of the yoke, and the windshields are fixed on the yoke. The combination of the dovetail key and the bolt fixes the magnetic poles, reducing the risk of connection loosening caused by high-speed vibration; the windshields reduce ineffective eddy currents.

[0011] The stator assembly includes a stator and a housing, and the stator is arranged inside the housing.

[0012] The stator includes a stator frame and a stator core, pressure fingers and pressing plates are arranged on both end faces of the stator, the pressure fingers and the pressing plates are connected to the stator through bolts, the stator core is fixedly connected to the stator frame through dovetail ribs and pull blocks, the housing includes an upper outer cover and a lower outer cover, and the stator frame is fixedly connected to the upper outer cover and the lower outer cover respectively through columns. The rigid connection of the dovetail ribs and the pull blocks prevents the stator core from shifting due to vibration.

[0013] A number of air cooler simulation devices are arranged on the outer peripheral side of the stator core, and the air cooler simulation devices are connected to the stator core through bolts. The air cooler simulation devices are used to simulate the air resistance effect of the air cooler in the ventilation circuit, and the air cooler simulation devices can be adjusted according to the air resistance characteristics of the actual air cooler.

[0014] The housing also includes two baffles, the two baffles are respectively connected to the upper outer cover and the lower outer cover through bolts, and sealing rings are arranged between the two baffles and the upper outer cover and the lower outer cover respectively. The upper outer cover, the lower outer cover, the baffles and the sealing rings together form the outer boundary of the fluid region, separating the flow field from the outside world.

[0015] The brake assembly comprises a brake disc and a brake. The brake disc is sleeved on the rotating shaft, and the brake is slidably connected to the brake disc.

[0016] The motor assembly is connected to the end of the rotating shaft away from the brake assembly, the support assembly includes a driving side bearing assembly and a braking side bearing assembly, the rotating shaft is passed through the driving side bearing assembly and the braking side bearing assembly, the braking side bearing assembly is located between the brake assembly and the rotor assembly, the driving side bearing assembly is located between the motor assembly and the rotor assembly, and a coupling is provided between the motor assembly and the driving side bearing assembly.

[0017] The beneficial effects of this application are: This application designs a ventilation model device based on the size of a real high-speed hydro-turbine generator at a certain scale. The flow field characteristics in each flow channel are consistent with those of the real machine, and can reflect the overall flow field characteristics of the real machine under normal operating conditions. The structure is compact and the connection is safe and reliable, playing an important guiding role in the study of ventilation problems and providing a basis for verifying and optimizing the ventilation system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the high-speed hydro-generator ventilation model device.

[0019] Figure 2 Schematic diagram of the overall structure of the high-speed hydro-generator ventilation model device in the embodiment.

[0020] Figure 3 for Figure 2 A-direction view in.

[0021] Figure 4 A schematic diagram of the partial structure of the rotor assembly.

[0022] Figure 5 A schematic diagram of the partial structure of the stator assembly.

[0023] Figure Number: 100, rotor assembly; 200, stator assembly; 300, support assembly; 400, motor assembly; 500, brake assembly; 101. Rotating shaft; 102. Magnetic yoke; 103. Magnetic pole; 104. Magnetic yoke key; 107. Dove-tail key; 108. Wind shield; 109. Coupling; 110. Yoke ventilation duct; 111. Rotor bracket ventilation hole; 201. Stator; 202. Casing; 203. Stator frame; 204. Stator core; 205. Pressing finger; 206. Pressing plate; 207. Dove-tail rib; 208. Pull block; 209. Upper outer cover; 210. Lower outer cover; 211. Column; 212. Air cooler simulator; 213. Baffle; 214. Sealing ring; 215. Stator coil end; 301. Drive-side bearing assembly; 302. Brake-side bearing assembly; 501. Brake disc; 502. Brake. DETAILED DESCRIPTION

[0024] The following describes the implementation of the present application through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present application from the contents disclosed in this specification.

[0025] The present application provides a high-speed hydro-generator ventilation model device. The following describes a preferred embodiment of the high-speed hydro-generator ventilation model device in conjunction with the accompanying drawings.

[0026] Example 1 During operation, high-speed hydro-turbine generators generate heat and electromagnetic losses due to the high-speed rotation of the rotor, requiring efficient ventilation systems for cooling. Therefore, a compact, safe, and reliable ventilation model device is urgently needed to guide ventilation system design, verify ventilation system performance, and provide a basis for design optimization.

[0027] Reference Attachment Figure 1 and 2 In this embodiment, a high-speed hydro-generator ventilation model device includes a rotor assembly 1, a stator assembly 200, a support assembly 300, a motor assembly 400, and a brake assembly 500. The rotor assembly 1 is composed of a rotating shaft 101, which passes through the center of the stator assembly 200. The rotating shaft 101 is arranged horizontally, with its ends connected to the motor assembly 400 and the brake assembly 500, respectively. The motor assembly 400 is used to drive the rotating shaft 101 to rotate, and the brake assembly 500 is used to brake the rotating shaft 101. The rotating shaft 101 is supported by a driving-side bearing assembly 301 and a braking-side bearing assembly 302. The driving-side bearing is located between the motor assembly 400 and the rotor, and the braking-side bearing is located between the brake assembly 500 and the rotor.

[0028] Reference Attachment Figure 1 and 2The brake assembly 500 includes a brake disc 501 and a brake 502. The brake disc 501 is an annular structure and is sleeved on the end of the rotating shaft 101 through an interference fit. The brake 502 is hydraulically driven to form a sliding friction contact with the brake disc 501 to achieve rapid braking. The brake 502 is fixed to the foundation. The two are used in conjunction to quickly reduce the rotating parts to zero after the test is completed. The speed of the speed motor can be adjusted as needed. The motor assembly 400 is rigidly connected to the rotating shaft 101 through the coupling 109 and transmits torque. The coupling 109 adopts a flange structure and is fixed by high-strength bolts. The coupling 109 can adapt to the position tolerance between the rotating shaft 101 and the motor within a certain allowable range, thereby reducing vibration and smoothly transmitting torque. The support system includes a drive side bearing and a non-drive side bearing, which support the shaft system and prevent the rotating parts from moving in the axial direction.

[0029] Embodiment 2 This embodiment improves the structure of the magnetic yoke 102 based on the first embodiment. Figures 1 to 4 The rotating shaft 101 is connected to the assembled yoke 102 via a yoke key 104. The yoke 102 is composed of several yoke pieces fastened together by bolts, including yoke pieces with ventilation slots. The yoke 102 is formed by stacking ordinary yoke pieces 102 and yoke pieces with ventilation slots, which are then tightened together with screws. The yoke 102 is composed of multiple layers of yoke pieces 102, which are laminated and fastened with high-strength bolts to form an integrally rigid structure. The layered stacking design of the yoke 102 reduces eddy current losses. The yoke 102 is composed of several yoke pieces fastened together by bolts, including yoke pieces with ventilation slots. In addition to the ventilation slots in the yoke 102, the gaps between the ordinary yoke pieces 102 also provide ventilation. The yoke pieces include yoke pieces with ventilation slots, forming yoke ventilation ducts 110 between the yoke pieces. Windshields 108 are installed at the top and bottom of the yoke 102 to ensure a flow field similar to that of a real machine. Windshields 108 reduce ineffective eddy currents and improve cooling efficiency. The shaft 101 and yoke 102 are connected via a yoke key 104. The magnetic poles 103 are connected to dovetail keys 107 in the outer diameter groove of the yoke 102 via countersunk bolts.

[0030] The outer circumference of the yoke 102 is provided with dovetail key slots 107, each set of slots containing a dovetail key 107. The poles 103 are secured to the dovetail keys 107 with T-bolts. Bolting the poles 103 to the dovetail keys 107 ensures stability under high-speed rotation and reduces the risk of loosening due to high-speed vibration. The poles 103 utilize a copper winding structure, with 12 radial ventilation grooves defined on the pole shoe surface. Annular windshields 108 made of aluminum alloy are installed at both ends of the yoke 102. The inner edge of the windshield 108 is fixed to the yoke 102, while the outer edge extends to the outer diameter of the poles 103 to guide airflow. The yoke 102 is connected via yoke keys 104, which transmit torque and maintain concentricity between the rotating shaft 101 and the yoke 102, minimizing vibration during operation. Windshields 108 are installed at the upper and lower ends of the yoke 102 to ensure a flow field similar to that of a real machine. The magnetic poles 103 are secured to the dovetail keys 107 on the outer diameter of the yoke 102 via countersunk bolts. The centrifugal force of the magnetic poles 103 is transmitted to the yoke 102 via the dovetail keys 107, converting it into a hoop stress that the yoke 102 can withstand. The air duct between the magnetic poles 103 is scaled down to the dimensions of the actual machine to ensure a flow field similar to that of the actual machine. The stator assembly 200 and the rotor assembly 1 together form a closed test environment, consistent with the operating environment of the actual machine.

[0031] In this embodiment, the layered lamination design of the yoke 102 reduces eddy current loss; the dovetail key 107 and the bolt combination fix the magnetic pole 103, reducing the risk of loose connection caused by high-speed vibration; the windshield 108 reduces invalid eddy current and improves cooling efficiency.

[0032] Embodiment 3 The design of a hydro-turbine generator's ventilation system requires ventilation calculations. However, the ventilation system itself is complex in terms of structure and fluid dynamics. Therefore, the calculations require empirical simplification of the analysis object and setting of appropriate calculation parameters. Because high-speed hydro-turbine generator ventilation systems have higher speeds and are more slender than conventional hydro-turbine generators, the internal fluid flow states vary more dramatically. Applying previous calculation methods and experience to high-speed hydro-turbine generator ventilation systems results in insufficient computational accuracy. To accurately understand the flow states of the ventilation system, in addition to performing ventilation calculations, it is necessary to establish a ventilation model device with a ventilation structure and flow field boundaries similar to those of a real turbine. This model can simulate the flow field characteristics of the real turbine, play an important guiding role in ventilation research, and provide a basis for verifying and optimizing ventilation systems.

[0033] This embodiment further refines the structure of the stator assembly based on the first embodiment. Figures 1 to 5The stator assembly 200 includes a housing 202 and a stator 201, which is disposed within the housing 202. The stator 201 includes a stator base 203 and a stator core 204. Pressure fingers 205 and pressure plates 206 are provided on both end surfaces of the stator 201. The pressure fingers 205 and pressure plates 206 are bolted to the stator 201. The stator core 204 is fixedly connected to the stator base 203 via dovetail bars 207 and pull blocks 208. The housing 202 includes an upper outer cover 209 and a lower outer cover 210. The stator base 203 is fixedly connected to the upper outer cover 209 and the lower outer cover 210 via columns 211.

[0034] The rigid connection between the dovetail ribs and the pull block prevents vibrational displacement of the stator core and improves structural stability. The housing 202 consists of an upper cover 209, a lower cover 210, and a baffle 213. The upper and lower covers 209 and 210 are connected to the stator base 203 via columns 211. Flanges are welded to each end of the columns 211 and bolted to the housing 202. A double-layer sealing ring 214 is installed between the baffle 213 and the housing 202: a rubber seal on the inside and a labyrinth-style stainless steel seal on the outside. The split housing and sealing ring 214 work together to reduce air leakage and ensure that cooling airflow is concentrated along the pre-set path. The stator core 204 is constructed of stacked silicon steel sheets. The stacked sheets are positioned using dovetail ribs 207. The pull block 208 is a split structure, connected to the stator base 203 via the dovetail ribs 207 and the pull block 208, thereby maintaining its roundness and concentricity with the rotating components.

[0035] An air cooler simulator 212 is secured to the outer periphery of stator 201 via an L-shaped bracket. This simulates the windage resistance of an air cooler within the ventilation circuit. The simulator 212 can be adjusted based on the windage characteristics of a real air cooler. It directly adheres to the surface of stator frame 203 to prevent gas leakage. Stator coil ends 215 are secured to stator core 204 to simulate their impact on the local flow field.

[0036] The upper housing 209 and lower housing 210 are bolted together to form a single unit. The lower housing 210 is fixed to the foundation, bearing the weight of the fixed components. The baffle 213 is divided into two halves and bolted to the upper and lower housings 209 and 210. The sealing ring 214 is divided into two halves and bolted to the baffle 213. The upper housing 209, lower housing 210, baffle 213, and sealing ring 214 together form the outer boundary of the fluid flow area, isolating the flow field from the outside world.

[0037] In this embodiment, the rigid connection between dovetail ribs 207 and pull blocks 208 prevents vibrational displacement of the stator core 204, improving structural stability. The air cooler directly adheres to the surface of the stator frame 203, preventing gas leakage. The split housing 202 and sealing ring 214 work together to reduce air leakage and ensure that airflow is concentrated along the pre-set path. The tightness of the housing 202 ensures that airflow is concentrated through the air cooler simulator 212, avoiding bypass losses.

[0038] In this embodiment, the structural dimensions of the flow-through components are reduced in proportion to the dimensions of the real machine, which can fully reflect the structural characteristics of the real machine. The flow field characteristics in each flow channel are also consistent with those of the real machine, which can fully reflect the flow field state of the real machine, thereby playing an important guiding role in the study of ventilation problems and providing a basis for verifying and optimizing the ventilation system.

[0039] Embodiment 4 The structure and flow patterns of a hydro-turbine generator ventilation system are extremely complex, requiring empirical simplification of the analysis object and setting of appropriate calculation parameters during calculations. High-speed hydro-turbine generators, due to their high speed and slender dimensions, experience more dramatic changes in the internal fluid flow patterns. Applying previous computational methods and experience to the calculation of high-speed hydro-turbine generator ventilation systems results in insufficient computational accuracy. To accurately understand the flow patterns of the ventilation system, a ventilation model device with a similar ventilation structure and flow field boundaries to a real machine is needed to simulate the flow field characteristics of the real machine. This model device plays an important guiding role in ventilation research and provides a basis for verifying and optimizing ventilation systems.

[0040] Reference Attachment Figures 1 to 5As a preferred embodiment, the high-speed hydro-turbine generator ventilation model device in this embodiment includes a rotor assembly 1, which is inserted into a stator assembly 200. The rotor assembly 1 includes a rotating shaft 101, which is inserted into a support assembly 300. The rotating shaft 101 is connected to a motor assembly 400 and a brake assembly 500 at its ends. The rotating shaft 101 is horizontally disposed, with the motor assembly 400 and the brake assembly 500 fixedly connected at its ends. The motor assembly 400 drives the rotating shaft 101, while the brake assembly 500 brakes the rotating shaft 101. The support assembly 300 is positioned on the rotating shaft between the rotor assembly 100, the motor assembly 400, and the brake assembly 500, providing support for the rotating shaft 101. The rotating shaft 101 is connected to a yoke 102 via a yoke key 104. The yoke 102 is provided with a plurality of magnetic poles 103. The yoke 102 is fastened together by bolts, with the yoke segments including ventilation slots. A plurality of dovetail keys 107 are provided on the outer periphery of the yoke 102, and the magnetic poles 103 are fixedly connected to the dovetail keys 107 by bolts. Windshields 108 are provided on both ends of the yoke 102, and the windshields 108 are fixed to the yoke 102. The yoke pieces include ventilation slots, and yoke ventilation ducts 110 are formed between the yoke pieces.

[0041] The rotating shaft 101 is horizontally arranged and consists of a welded shaft body and rotor bracket. The bracket adopts a structure similar to that of a real machine, consisting of upper and lower ring plates welded together with several radial ribs. The rotor bracket ventilation holes 111 on the ring plates are scaled down to the dimensions of the real machine to ensure a flow field similar to that of the real machine. The rotating shaft 101 is connected to the motor assembly 400 via a coupling 109. The coupling 109 can accommodate positional tolerances between the rotating shaft 101 and the motor assembly 400 within a certain range, thereby reducing vibration and smoothly transmitting torque.

[0042] The yoke 102 is constructed by stacking conventional yokes and ventilation slot yokes, which are then tightened with screws. In addition to the ventilation slots, the gaps between the conventional yokes also provide ventilation. The yoke 102 ventilation ducts are scaled down to the dimensions of the actual machine to ensure a flow field similar to that of the actual machine. The rotating shaft 101 and yoke 102 are connected by a yoke key 104. This key transmits torque and maintains concentricity between the rotating shaft 101 and yoke 102, minimizing vibration during operation. Wind deflectors 108 are installed at the upper and lower ends of the yoke 102 to ensure a flow field similar to that of the actual machine. The magnetic poles 103 are secured to dovetail keys 107 on the outer diameter of the yoke 102 with countersunk bolts. The centrifugal force of the magnetic poles 103 is transmitted to the yoke 102 via the dovetail keys 107, converting it into a hoop stress that the yoke 102 can withstand. The size of the air duct between the magnetic poles 103 is reduced in proportion to the size of the real machine to ensure that the flow field is similar to that of the real machine.

[0043] The laminated design of the yoke 102 reduces eddy current losses; the dovetail key 107 and bolts are combined to fix the magnetic pole 103, reducing the risk of connection loosening caused by high-speed vibration; the wind deflector 108 reduces ineffective eddy currents.

[0044] The stator assembly 200 includes a stator 201 and a housing 202, and the stator 201 is arranged inside the housing 202. The stator 201 includes a stator frame 203 and a stator core 204. Pressing fingers 205 and pressing plates 206 are provided on both end faces of the stator 201. The pressing fingers 205 and the pressing plates 206 are connected to the stator 201 by bolts. The stator core 204 is fixedly connected to the stator frame 203 through dove-tail ribs 207 and pull blocks 208. The housing 202 includes an upper outer cover 209 and a lower outer cover 210. The stator frame 203 is fixedly connected to the upper outer cover 209 and the lower outer cover 210 respectively through columns 211. A number of air cooler simulation devices 212 are provided on the outer peripheral side of the stator core 204, and the air cooler simulation devices 212 are connected to the stator core 204 by bolts. The housing 202 further includes two baffles 213. The two baffles 213 are respectively connected to the upper outer cover 209 and the lower outer cover 210 by bolts, and sealing rings 214 are provided between the two baffles 213 and the upper outer cover 209 and the lower outer cover 210 respectively.

[0045] The stator 201 includes a stator frame 203 and a stator core 204. The housing 202 includes an upper outer cover 209, a lower outer cover 210, baffles 213 and sealing rings 214. The stator frame 203 is connected to the upper outer cover 209 and the lower outer cover 210 through columns 211. The air cooler simulation devices 212 are fixed on the outer wall of the stator frame 203 by bolts to simulate the air resistance effect of the air cooler in the ventilation circuit, and the air cooler simulation devices 212 can be adjusted according to the air resistance characteristics of the real air cooler. The stator core 204 is laminated by silicon steel sheets. Pressing fingers 205 are installed at both ends of the stator core 204, and a pressing plate 206 is installed on the non-driving side. The stator core 204 is tightened by screws. Further, the stator core 204 is connected to the stator frame 203 through dove-tail ribs 207 and pull blocks 208, so as to maintain its own roundness and concentricity with the rotating parts. The end part 215 of the stator coil is fixed on the stator core 204 to simulate its influence on the local flow field.

[0046] The upper outer cover 209 and the lower outer cover 210 are connected into one body by bolts. The lower outer cover 210 is fixed on the foundation and bears the weight of the fixed parts. The baffle 213 is divided into two petals and is fixed on the upper outer cover 209 and the lower outer cover 210 by bolts. The sealing ring 214 is divided into two petals and is fixed on the baffle. The upper outer cover 209, the lower outer cover 210, the baffles 213 and the sealing rings 214 together form the outer boundary of the fluid region, separating the flow field from the outside world.

[0047] The rigid connection between the dovetail rib 207 and the pulling block 208 prevents the stator core 204 from shifting due to vibration, improving the structural stability; the air cooler is directly attached to the surface of the stator frame 203 to prevent gas leakage; the split housing 202 and the sealing ring 214 cooperate to reduce air flow leakage, ensuring that the cooling air flow passes through the preset path concentratedly.

[0048] The stator assembly 200 and the rotor assembly 1 together form a closed test environment, thus being consistent with the operating environment of the real machine.

[0049] The braking assembly 500 includes a brake disc 501 and a brake 502. The brake disc 501 is sleeved on the rotating shaft 101, and the brake 502 is slidably connected to the brake disc 501. The motor assembly 400 is connected to the end of the rotating shaft 101 away from the braking assembly 500. The support assembly 300 includes a driving side bearing assembly 301 and a braking side bearing assembly 302. The rotating shaft 101 passes through the driving side bearing assembly 301 and the braking side bearing assembly 302. The braking side bearing assembly 302 is located between the braking assembly 500 and the rotor assembly 1, and the driving side bearing assembly 301 is located between the motor assembly 400 and the rotor assembly 1. A coupling 109 is provided between the motor assembly 400 and the driving side bearing assembly 301.

[0050] In this embodiment, when the motor assembly 400 drives the rotating shaft 101 to rotate, it drives the air flow around the rotor assembly 1. The air flow enters the cavity of the stator frame 203 through the ventilation slots of the stator core 204 and finally is discharged through the air cooler simulation device 212. The airtightness of the housing 202 ensures that a closed air cooling circulation system is formed inside the housing.

[0051] The structural dimensions of all the current-carrying components in this application are reduced from the dimensions of the real machine according to a certain proportion, which can fully reflect the structural characteristics of the real machine. The flow field characteristics in each current-carrying flow channel are also consistent with the real machine, and can fully reflect the flow field state of the real machine, thus playing an important guiding role in the research of ventilation problems and providing a basis for verifying and optimizing the ventilation system.

[0052] The above content is the preferred embodiment of this application, which is used to illustrate the specific structure and function of this application. It should be pointed out that without departing from the principle of this application, those of ordinary skill in the art can make expected improvements and modifications to this application, and these improvements and modifications are also within the protection scope of this application.

Claims

1. A ventilation model device for a high-speed hydro-generator, characterized in that, It includes a rotor assembly, the rotor assembly is disposed through a stator assembly, the rotor assembly includes a rotating shaft, the rotating shaft is disposed through a support assembly, and both ends of the rotating shaft are respectively connected to a motor assembly and a braking assembly.

2. The high-speed hydro-generator ventilation model device according to claim 1, characterized in that, The rotating shaft is connected to a yoke through a yoke key, and the yoke is provided with a plurality of magnetic poles.

3. The high-speed hydro-generator ventilation model device according to claim 2, characterized in that, The yoke is formed by fastening a plurality of yoke sheets through bolts, and among the plurality of yoke sheets, there is a ventilating groove yoke sheet.

4. A high-speed hydrogenerator ventilation model device according to claim 2, characterized in that A plurality of dovetail keys are provided on the outer peripheral side of the yoke, the magnetic poles are fixedly connected to the dovetail keys through bolts, windshields are provided on both end faces of the yoke, and the windshields are fixed on the yoke.

5. A high-speed hydrogenerator ventilation model device according to claim 1, characterized in that, The stator assembly includes a stator and a housing, and the stator is disposed inside the housing.

6. The high-speed hydro-generator ventilation model device according to claim 5, wherein The stator includes a stator frame and a stator core, press fingers and press plates are provided on both end faces of the stator, the press fingers and the press plates are connected to the stator through bolts, the stator core is fixedly connected to the stator frame through dovetail ribs and pull blocks, the housing includes an upper outer cover and a lower outer cover, and the stator frame is fixedly connected to the upper outer cover and the lower outer cover respectively through columns.

7. A high-speed hydro-generator ventilation model device according to claim 6, characterized in that, A plurality of air cooler simulation devices are provided on the outer peripheral side of the stator core, and the air cooler simulation devices are connected to the stator core through bolts.

8. The high-speed hydrogenerator ventilation model device according to claim 6, characterized in that, The housing further includes two baffles, the two baffles are respectively connected to the upper outer cover and the lower outer cover through bolts, and sealing rings are provided between the two baffles and the upper outer cover and the lower outer cover respectively.

9. A high-speed hydrogenerator ventilation model device according to any one of claims 1 to 8, characterized in that, The braking assembly includes a brake disc and a brake, the brake disc is sleeved on the rotating shaft, and the brake is slidably connected to the brake disc.

10. A high-speed hydro-generator ventilation model device according to claim 9, characterized in that, The motor assembly is connected to the end of the rotating shaft away from the braking assembly, the support assembly includes a drive side bearing assembly and a brake side bearing assembly, the rotating shaft is disposed through the drive side bearing assembly and the brake side bearing assembly, the brake side bearing assembly is located between the braking assembly and the rotor assembly, the drive side bearing assembly is located between the motor assembly and the rotor assembly, and a coupling is provided between the motor assembly and the drive side bearing assembly.

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