CN114530979B - Stress self-adaptive structure of fluid machinery rotating part - Google Patents
Stress self-adaptive structure of fluid machinery rotating part Download PDFInfo
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- CN114530979B CN114530979B CN202210015278.0A CN202210015278A CN114530979B CN 114530979 B CN114530979 B CN 114530979B CN 202210015278 A CN202210015278 A CN 202210015278A CN 114530979 B CN114530979 B CN 114530979B
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- 239000012530 fluid Substances 0.000 title claims abstract description 46
- 230000003044 adaptive effect Effects 0.000 claims 1
- 230000003014 reinforcing effect Effects 0.000 abstract description 19
- 238000005452 bending Methods 0.000 abstract description 17
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005728 strengthening Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000003351 stiffener Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
- H02K1/30—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures using intermediate parts, e.g. spiders
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Hydraulic Turbines (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention discloses a stress self-adaptive structure of a fluid mechanical rotating part, which comprises a connecting disc with a rotating shaft and a magnetic yoke ring, wherein a stress compensation mechanism is arranged between two ends of the magnetic yoke ring and the connecting disc, the stress compensation mechanism comprises a supporting rod, a reinforcing rod and a pull rope, the inner end of the supporting rod is connected with the connecting disc, the inner end of the reinforcing rod is connected with the connecting disc, the reinforcing rod is connected with the outer end of the supporting rod, a pulley is arranged at the joint of the supporting rod and the reinforcing rod, a slidable compensation block is arranged on the supporting rod, one end of the pull rope is connected with the end part of the magnetic yoke ring, the other end of the pull rope bypasses the pulley and is connected with the compensation block, and when the fluid mechanical rotating part rotates, the compensation block forms an outward centrifugal force and forms a compensation acting force towards the axis of the magnetic yoke ring through the pull rope. The invention can effectively improve the bending strength of the magnetic yoke ring on the basis of keeping the original weight and manufacturing cost of the magnetic yoke ring, and ensures that the magnetic gap between the rotor and the stator is uniform.
Description
Technical Field
The invention relates to the technical field of hydraulic generators, in particular to a stress self-adaptive structure of a fluid mechanical rotating part.
Background
With the enhancement of energy conservation and environmental protection consciousness, large-scale fluid machines such as hydroelectric power generation machines, large-scale pump stations and high-temperature environment cooling liquid conveying pumps serving as green energy sources are greatly developed. The rotor of the rotary fluid power equipment generally comprises a connecting disc arranged on a rotating shaft and a cylindrical magnetic yoke ring arranged at the edge of the connecting disc, wherein the middle of the inner side of the cylindrical magnetic yoke ring is connected with the connecting disc, so that the axial section of the rotor is in an I shape, and a magnetic gap is reserved between the magnetic yoke ring and the stator. When the machine set runs, the rotor can rotate at a high speed, and the magnetic yoke ring has extremely large weight, so that extremely large centrifugal force is generated, the two suspended ends of the magnetic yoke ring can incline outwards and turn over under the action of the centrifugal force, the magnetic gap of a healthy person is changed, and even friction interference is generated between the magnetic yoke ring and the stator when the magnetic yoke ring is serious.
In order to avoid bending deformation of the yoke ring, the technical means adopted by people generally include: the first solution is to increase the size of the yoke ring to increase its strength and rigidity, but this solution has drawbacks of increased weight and cost, and increased centrifugal force; the second scheme is that a reinforcing rib sheet is arranged at the joint of the connecting disc and the magnetic yoke ring to improve the bending strength, and the scheme has the following defects: it can be understood that the reinforcing rib mainly has the effect of increasing the strength at the joint of the connecting disc and the yoke ring, and for the two ends of the yoke ring far away from the joint, the effect of increasing the strength is tiny, and the two ends of the yoke ring are the parts which are most easy to bend, so that the technical problem that the two ends of the yoke ring bend and deform, and then the magnetic gap between the rotor and the stator is changed is difficult to effectively eliminate by the scheme.
Disclosure of Invention
The invention aims to solve the problems that a yoke ring of a rotor of an existing bulb through-flow turbine is easy to bend and deform due to centrifugal force, and magnetic gaps between the rotor and a stator are difficult to be uniform, and provides a stress self-adaptive structure of a fluid mechanical rotating part, which can effectively improve the bending strength of the yoke ring and ensure the uniform magnetic gaps between the rotor and the stator on the basis of not obviously increasing the weight and manufacturing cost of the yoke ring.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the stress self-adaptive structure of the fluid mechanical rotating component comprises a connecting disc, a rotating shaft connected to the center of the disc and a cylindrical magnetic yoke ring, wherein the edge of the connecting disc is connected to the middle position of the inner side of the magnetic yoke ring in the axial direction, a stress compensation mechanism is arranged between the two ends of the magnetic yoke ring and the connecting disc, when the fluid mechanical rotating component rotates, the stress compensation mechanism generates a compensation acting force towards the axis of the magnetic yoke ring on any one end of the magnetic yoke ring, the compensation acting force forms an inwards-turned compensation torque towards the end of the magnetic yoke ring, the stress compensation mechanism comprises a plurality of support rods, reinforcing rods and a pull rope, the inner ends of the support rods are connected to the connecting disc at the position close to the joint of the magnetic yoke ring, the inner ends of the reinforcing rods are connected with the connecting disc, the outer ends of the support rods incline outwards towards the center side of the connecting disc, pulleys are arranged at the joint of the support rods and the reinforcing rods, a slidable compensation block is arranged on the support rods, one end of the pull rope is connected to the end of the magnetic yoke ring, the other end of the pull rope bypasses the pulleys and then is connected with the compensation block, and the centrifugal force forms an outwards-turned compensation torque towards the axis of the magnetic yoke ring when the fluid mechanical rotating component rotates, and forms an outwards-turned compensation force F towards the end of the magnetic yoke ring; or, the stress compensation mechanism comprises a plurality of radial pull rods, one ends of the radial pull rods are connected to one side of the end part of the magnetic yoke ring, the other ends of the radial pull rods are positioned at the other side of the magnetic yoke ring, compensation blocks are arranged at the other ends of the radial pull rods and are clung to the front side of the rotating direction of the rotating shaft, when the fluid machinery rotating part rotates, the compensation blocks form an outward centrifugal force, and a compensation acting force F facing the axis of the magnetic yoke ring is formed on the end part of the magnetic yoke ring through the radial pull rods.
The fluid mechanical rotation element of the present invention preferably refers to a rotor of a hydraulic generator, and similarly to the prior art, the fluid mechanical rotation element includes a yoke ring on the periphery, a connection disc (connection bracket) connected to the middle inside the yoke ring, and a rotation shaft connected to the center of the connection disc (connection bracket). When the water turbine drives the rotor to rotate through the rotating shaft, the hydroelectric generation can be realized.
Because the yoke ring has larger radius and mass, when the rotor rotates at high speed, the front end and the rear end of the yoke ring which are suspended in the air can generate radial outward centrifugal force, and the centrifugal force can form bending torque for outwards bending and overturning the outer end of the yoke ring, so that the magnetic gap between the rotor and the stator is influenced.
The invention sets stress compensation mechanism between two ends of the magnetic yoke ring and the connecting disc, thus when the fluid machinery rotating part (namely the rotor) rotates at high speed and forms huge centrifugal force, the stress compensation mechanism can generate compensation acting force towards the axis of the magnetic yoke ring to any one end of the magnetic yoke ring, and the compensation acting force forms inward overturning compensation torque to the end of the magnetic yoke ring so as to effectively offset bending torque formed by the centrifugal force of the magnetic yoke ring, thereby avoiding the outward overturning and bending deformation of two ends of the magnetic yoke ring.
As a first scheme, the compensating mechanism comprises a triangular bracket formed by connecting a supporting rod and a reinforcing rod, and a pulley is arranged at the outer end of the triangular bracket, so that when the fluid machinery rotating part rotates, a compensating block which is connected to the supporting rod in a sliding way forms an outward centrifugal force, and a compensating acting force F towards the axis of the magnetic yoke ring is formed on the end part of the magnetic yoke ring through a pull rope.
It will be appreciated that the pulley should be positioned close to the end face of the yoke ring and the pull cord connected between the yoke ring and the pulley is then positioned as radially as possible to minimize the weight of the compensating block while ensuring a sufficient compensating force F.
As a second solution, the stress compensation mechanism comprises several radial tie rods, and one end of the radial tie rod is connected to the yoke ring, and the other end of the radial tie rod is located on the other side of the yoke ring beyond the rotation axis. Thus, when the fluid machinery rotating part rotates, the compensation block arranged at the other end of the radial pull rod forms an outward centrifugal force, and a compensation acting force F towards the axis of the magnetic yoke ring is formed on the end part of the magnetic yoke ring through the radial pull rod.
It will be appreciated that in this solution, since the radial tie rod is located substantially in the radial direction of the yoke ring, the centrifugal force of the compensation block can be largely converted into a compensation force F acting on the yoke ring and directed towards the axis of the yoke ring, which is advantageous for lifting the compensation force F at the same compensation block mass.
In addition, since the radial tension rod is abutted against the front side in the rotation direction of the rotation shaft, the radial tension rod is always abutted against the rotation shaft by inertia when the fluid machine rotation member rotates.
Preferably, the support rod is sleeved with a limiting ring, the limiting ring is provided with a fastening screw which can fix the limiting ring on the support rod, and one end, far away from the pulley, of the limiting ring abuts against the compensation block.
Because the support rod is sleeved with the limiting ring, and the compensation block is abutted against the limiting ring, when the fluid machinery rotating part is static, the compensation block can be reliably positioned on the support rod, and meanwhile, when the fluid machinery rotating part rotates, the compensation block cannot be influenced to slide outwards to realize the compensation effect.
Preferably, the mass of the yoke ring is m, the radius of the yoke ring is r, the rotation speed of the fluid mechanical rotation component is n, and the compensation acting force F and the rotation speed n form the following relation: 2 pi 2 m×r×n 2 /3≤ F≤4π 2 m×r×n 2 /3。
It will be appreciated that for a fluid mechanical rotating component, the mass m, radius r of the yoke ring is a fixed value. In addition, the fluid machinery rotating part is acted by outward centrifugal force when rotating, on the one hand, the inward pulling force of the connecting disc and the inward compensating acting force F at the two ends of the magnetic yoke ring are acted on the other hand, and the outward centrifugal force and the inward pulling force of the connecting disc and the inward compensating acting force F at the two ends of the magnetic yoke ring are balanced.
The invention controls the compensation acting force F and the rotating speed n within the following range:
2π 2 m×r×n 2 /3≤ F≤4π 2 m×r×n 2 /3，
thus, the sum of the compensation forces at the two ends of the yoke ring is 4 pi 2 m×r×n 2 3 to 8 pi 2 m×r×n 2 In the range of/3, the balance between the outward centrifugal force and the inward pulling force of the connecting disc and the inward compensating force F at the two ends of the magnetic yoke ring can be ensured, and the balance between the bending moment caused by the centrifugal force of the magnetic yoke ring and the compensating torque caused by the stress compensating mechanism acting on the two ends of the magnetic yoke ring and turning inwards can be ensured, so that the magnetic gap between the magnetic yoke ring and the stator is ensured to be kept stableAnd (5) setting.
Therefore, the invention has the following beneficial effects: on the basis of not obviously increasing the weight and the manufacturing cost of the magnetic yoke ring, the bending strength of the magnetic yoke ring can be effectively improved, and the magnetic gap between the rotor and the stator is ensured to be uniform.
Drawings
Fig. 1 is a schematic view of a conventional fluid machine rotating member.
Fig. 2 is a side view of fig. 1.
Fig. 3 is a schematic view of a structure in which a conventional yoke ring is bent outwards and turned upside down when subjected to centrifugal force.
FIG. 4 is a schematic diagram of a first construction of the stress compensation mechanism of the present invention.
FIG. 5 is a schematic diagram of a second construction of the stress compensation mechanism of the present invention.
FIG. 6 is a schematic view of a third construction of the stress compensation mechanism of the present invention.
Fig. 7 is a side view of fig. 6.
In the figure: 1. the connecting disc 2, the rotating shaft 3, the magnetic yoke ring 4, the correcting ring piece 41, the reinforcing rib piece 411, the sliding groove 42, the compensating block 43, the sliding rod 44, the pressure spring 5, the brake caliper 6, the supporting rod 61, the reinforcing rod 62, the pull rope 63, the pulley 64, the limiting ring 7, the radial pull rod 8, the roller 9 and the tension spring.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
In the present embodiment, the fluid machine is a hydraulic generator, and the rotating component is a rotor. Similarly to the prior art, as shown in fig. 1 and 2, the fluid machinery rotating part comprises a connecting disc 1, a rotating shaft 2 connected to the center of the disc, and a cylindrical yoke ring 3, wherein the edge of the connecting disc is connected to the middle position of the inner side of the yoke ring in the axial direction. When the water turbine drives the rotor to rotate through the rotating shaft, the hydroelectric generation can be realized. Of course, a stator (not shown) should be provided outside the rotor, and since the basic structure of the hydro-generator such as the rotor and the stator belongs to the prior art, the detailed description will not be given again.
Because the yoke ring has a larger radius and mass, and the yoke ring is only pulled by the connecting disc at the middle position, as shown in fig. 3, when the rotor rotates at a high speed, the front and rear ends of the yoke ring which are suspended in the air generate radial outward centrifugal force, and the centrifugal force can form bending torque for outwards bending and overturning the outer end of the yoke ring, so that the magnetic gap between the rotor and the stator is influenced.
Therefore, the invention sets stress compensation mechanism between two ends of the magnetic yoke ring and the connecting disc, when the fluid machinery rotating part rotates, the stress compensation mechanism generates a compensation acting force towards the axis of the magnetic yoke ring to any one end of the magnetic yoke ring, the compensation acting force forms an inward overturning compensation torque to the end of the magnetic yoke ring so as to effectively offset bending torque formed by centrifugal force of the magnetic yoke ring, thereby avoiding eversion and bending deformation of two ends of the magnetic yoke ring and ensuring that a magnetic gap between a rotor and a stator is kept stable.
As a first preferred scheme, as shown in fig. 4, the stress compensation mechanism comprises a circular correction ring piece 4 and a brake caliper 5 capable of braking the correction ring piece, the outer side edge of the correction ring piece is fixedly connected to the end part of the magnetic yoke ring, and the brake caliper can be fixedly arranged on a stand fixed by the generator so as to brake the inner hole edge of the correction ring piece. When the rotating parts of the fluid machinery are required to be braked for maintenance, the rotating parts can be stopped quickly by the brake caliper, so that the efficiency is improved. That is, in this embodiment, the correction ring simultaneously acts like an automotive brake pad.
In addition, we can set up a plurality of strengthening rib pieces 41 that evenly distributed in circumference between correction ring piece and yoke circle inboard, and one side fixed connection of strengthening rib piece is on correction ring piece, then is equipped with the deformation clearance between strengthening rib piece and yoke circle inboard. In addition, a chute 411 extending outward is provided in the reinforcing rib sheet, and a compensation block 42 is provided in the chute.
When the fluid machinery rotating part rotates at a high speed, the compensation block forms an outward centrifugal force, and at the moment, the centrifugal force forms an inward torque on the correction ring piece through the reinforcing rib piece fixed on the correction ring piece, and then forms an inward overturning compensation torque on the end part of the magnetic yoke ring through the correction ring piece fixed on the end part of the magnetic yoke ring, so that the outward overturning bending torque caused by the centrifugal force of the magnetic yoke ring is fully offset.
It will be appreciated that by rationally designing the weight of the compensation block, its location on the stiffener plate, etc., the compensation torque is sufficient to balance the bending torque of the yoke ring turning outward to ensure that the magnetic gap between the rotor and stator remains stable.
It should be noted that, we can set up a plurality of strengthening ribs between correction ring piece and yoke circle inboard, and the strengthening rib interval sets up between adjacent correction ring piece to increase the joint strength and the rigidity between correction ring piece and the yoke circle, and then make correction ring piece can form sufficient compensation moment of torsion to yoke circle tip.
Further, we can set up the slide bar 43 that extends along spout length direction in the spout, and the both ends of slide bar are connected at the spout both ends, and the compensation piece movably overlaps and establishes on the slide bar, sets up the pressure spring 44 that cup joints on the slide bar respectively at the compensation piece both ends to make compensation piece elastic positioning in the spout.
When the compensation block rotates at a high speed to generate centrifugal force, the compensation block can overcome the elastic force of the outer pressure spring to move outwards, so that the centrifugal force of the compensation block is increased. The elastic coefficient of the pressure spring can be reasonably designed to ensure that the compensation block stays at a proper position in the chute, so that the centrifugal force of the compensation block is matched with the required compensation torque.
It should be noted that, the length of the outer compression spring may be longer than that of the inner compression spring, so as to facilitate the compensation block moving outwards.
As a second preferred scheme, as shown in FIG. 5, the stress compensation mechanism comprises a plurality of support rods 6, reinforcing rods 61 and pull ropes 62, wherein the inner ends of the support rods are connected to the connecting disc near the joint with the magnetic yoke ring, the inner ends of the reinforcing rods are connected to the connecting disc far away from the magnetic yoke ring, the outer ends of the support rods incline towards one side of the center of the connecting disc, and the reinforcing rods incline outwards from the inner ends to the outer ends and are connected with the outer ends of the support rods, so that the support rods and the reinforcing rods are connected into a triangular support. In addition, a pulley 63 is arranged at the joint of the support rod and the reinforcing rod, a slidable compensation block 42 is arranged on the support rod, one end of the pull rope is connected to the end part of the magnetic yoke ring, and the other end of the pull rope inwards bypasses the pulley and then is connected with the compensation block.
When the fluid machinery rotating part rotates, the compensation block forms an outward centrifugal force, so that a compensation acting force F towards the axis of the magnetic yoke ring is formed on the end part of the magnetic yoke ring through the pull rope. Of course, the pulley should be positioned as close to the end face of the yoke ring as possible so that the pull rope connected between the yoke ring and the pulley is positioned as radially as possible, thereby minimizing the weight of the compensating block while ensuring a sufficient compensating force F.
Further, we can also set a spacing ring 64 on the support bar, the spacing ring is set with fastening screw which can fix the spacing ring on the support bar, one end of the spacing ring far away from the pulley is propped against the compensation block.
Therefore, when the fluid machinery rotating part is static, the compensation block is reliably positioned on the supporting rod under the action of the pull rope, and the limiting ring at the moment plays a role in positioning the compensation block, so that the compensation block is prevented from freely moving, and the assembly is convenient. When the fluid machinery rotating part is at high speed, the compensation block can freely slide outwards on the support rod to realize the compensation function.
As a third preferred scheme, as shown in fig. 6/7, the stress compensation mechanism comprises a plurality of radial pull rods 7, one ends of the radial pull rods are connected to one side of the end part of the magnetic yoke ring, the other ends of the radial pull rods are positioned at the other side of the magnetic yoke ring beyond the rotating shaft connected with the middle of the disc, and compensation blocks are arranged at the other ends of the radial pull rods.
When the fluid machine rotating part rotates, the compensation block forms an outward centrifugal force, which forms a compensation force F towards the axis of the yoke ring on the end of the yoke ring through the radial pull rod. It will be appreciated that the other end of the radial tie rod is brought as close to the other side of the yoke ring as possible to provide the compensation block with a maximum radius of rotation, thereby increasing the compensation force F to facilitate a reduction in the mass of the compensation block.
The end of the radial pull rod, which is connected to the end of the yoke ring, is called a connecting end, and the end of the radial pull rod, which is provided with the compensation block, is called a suspension end. The radial pull rods are uniformly distributed at the end part of the magnetic yoke ring along the circumferential direction.
It will be appreciated that when the fluid machinery rotating member rotates, the free end of the radial tension rod swings toward the rear side in the rotation direction of the rotating shaft under the action of inertia. For this purpose, the radial tie rod can be placed against the front side of the rotational direction of the rotational shaft, so that the radial tie rod can always be placed against and positioned on the rotational shaft when the fluid-mechanical rotational element is rotated.
Further, the free end of the radial pull rod provided with the compensation block is connected to the other side of the yoke ring by a tension spring 9, that is, both ends of the radial pull rod are connected to the yoke ring. Thus, when the fluid machinery rotating component is stationary, the radial pull rod can be reliably positioned, thereby facilitating assembly.
Still further, the radial pull rod comprises a first section connected with the end part of the magnetic yoke ring and a second section provided with a compensation block, wherein the first section and the second section are connected through a roller 8, the roller is abutted against the rotating shaft, and the connecting end and the suspension end of the radial pull rod are arranged in the magnetic yoke ring approximately symmetrically. That is, the first and second sections of the radial tension rod are bent at the intermediate corresponding rotational axes. The included angle between the first section and the second section can be controlled to be 10-15 degrees, so that the compensating block on the second section and the connecting point of the first section and the magnetic yoke ring are approximately positioned on the same radial direction, and the centrifugal force generated by the compensating block can be lifted to the greatest extent or the weight of the compensating block can be reduced as much as possible.
When the fluid machinery rotating part rotates, the roller arranged at the joint of the first section and the second section can form rolling friction with the rotating shaft. When the compensation block pulls the radial pull rod to elastically stretch, the friction resistance between the radial pull rod and the rotating shaft can be reduced, and the service life is prolonged.
For convenience of description, let the mass of the yoke ring be m, the radius of the yoke ring be r, and the rotation speed of the fluid machinery rotation part during operation be n. Since the mass m and the radius r of the magnetic yoke ring are fixed values, the mechanical principle shows that the centrifugal force formed by the magnetic yoke ring is proportional to the square of the rotating speed n when the fluid mechanical rotating part rotates.
By reasonably designing parameters such as the mass of the compensation block, the compensation acting force F and the rotating speed n can form the following relation: 2 pi 2 m×r×n 2 /3≤ F≤4π 2 m×r×n 2 /3。
It will be appreciated that when the fluid machine rotating member is rotated, it is subjected to an outward centrifugal force on the one hand and an inward pulling force of the connecting disc, an inward compensating force F at both ends of the yoke ring on the other hand, and the sum of the outward centrifugal force and the inward pulling force of the connecting disc plus the inward compensating force F at both ends of the yoke ring is balanced.
When 2 pi 2 m×r×n 2 /3≤ F≤4π 2 m×r×n 2 And 3, the balance between the outward centrifugal force and the inward pulling force of the connecting disc and the sum of the inward compensating forces F at the two ends of the magnetic yoke ring can be ensured, so that the outward overturning bending moment caused by the centrifugal force of the magnetic yoke ring and the inward overturning compensating torque applied to the two ends of the magnetic yoke ring by the stress compensating mechanism can be maintained to be balanced, and the magnetic gap between the magnetic yoke ring and the stator can be ensured to be kept stable.
Claims (5)
1. The stress self-adaptive structure of the fluid machinery rotating part comprises a connecting disc, a rotating shaft connected to the center of the disc and a cylindrical magnetic yoke ring, wherein the edge of the connecting disc is connected to the middle position of the inner side of the magnetic yoke ring in the axial direction; or, the stress compensation mechanism comprises a plurality of radial pull rods, one ends of the radial pull rods are connected to one side of the end part of the magnetic yoke ring, the other ends of the radial pull rods are positioned at the other side of the magnetic yoke ring, compensation blocks are arranged at the other ends of the radial pull rods and are abutted against the front side of the rotating direction of the rotating shaft, when the fluid machinery rotating part rotates, the compensation blocks form an outward centrifugal force, and a compensation acting force F facing to the axis of the magnetic yoke ring is formed on the end part of the magnetic yoke ring through the radial pull rods; or, the stress compensation mechanism comprises a plurality of radial pull rods, one ends of the radial pull rods are connected to one side of the end part of the magnetic yoke ring, the other ends of the radial pull rods are positioned at the other side of the magnetic yoke ring, compensation blocks are arranged at the other ends of the radial pull rods and are abutted against the front side of the rotating direction of the rotating shaft, when the fluid machinery rotating part rotates, the compensation blocks form an outward centrifugal force, and a compensation acting force F facing to the axis of the magnetic yoke ring is formed on the end part of the magnetic yoke ring through the radial pull rods;
the stress compensation mechanism comprises a circular correction ring piece (4) and a brake caliper (5) capable of braking the correction ring piece, the outer side edge of the correction ring piece is fixedly connected to the end part of the magnetic yoke ring, and the brake caliper can be fixedly arranged on a stand fixed by the generator.
2. The stress self-adaptive structure of a rotating part of a fluid machine according to claim 1, wherein the supporting rod is sleeved with a limiting ring, the limiting ring is provided with a fastening screw which can fix the limiting ring on the supporting rod, and one end of the limiting ring far away from the pulley abuts against the compensation block.
3. A stress adaptive structure for a fluid machinery rotating member according to claim 1, wherein the other end of the radial tension rod provided with the compensation block is connected to the other side of the yoke ring by a tension spring.
4. A stress self-adaptive structure of a fluid machinery rotating component according to claim 3, wherein the radial pull rod comprises a first section connected with the end part of the magnetic yoke ring and a second section provided with a compensation block, the first section is connected with the second section through a roller, the second section is inclined from the roller towards the radial direction and forms an included angle of 10 degrees to 15 degrees with the first section, and the roller is abutted against the rotating shaft.
5. The structure according to claim 1, wherein the mass of the yoke ring is m, the radius of the yoke ring is r, the rotation speed of the fluid mechanical rotation part is n, and the compensation force F and the rotation speed n form the following relationship: 2 pi 2 m×r×n 2 /3≤ F≤4π 2 m×r×n 2 /3。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210015278.0A CN114530979B (en) | 2021-02-20 | 2021-02-20 | Stress self-adaptive structure of fluid machinery rotating part |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110194399.1A CN112994337B (en) | 2021-02-20 | 2021-02-20 | Fluid machinery rotating part stress self-adaptation structure |
| CN202210015278.0A CN114530979B (en) | 2021-02-20 | 2021-02-20 | Stress self-adaptive structure of fluid machinery rotating part |
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| CN202110194399.1A Division CN112994337B (en) | 2021-02-20 | 2021-02-20 | Fluid machinery rotating part stress self-adaptation structure |
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| CN114530979A CN114530979A (en) | 2022-05-24 |
| CN114530979B true CN114530979B (en) | 2023-12-12 |
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| CN202210015278.0A Active CN114530979B (en) | 2021-02-20 | 2021-02-20 | Stress self-adaptive structure of fluid machinery rotating part |
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| CN202110194399.1A Active CN112994337B (en) | 2021-02-20 | 2021-02-20 | Fluid machinery rotating part stress self-adaptation structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203219037U (en) * | 2013-03-07 | 2013-09-25 | 重庆云河水电股份有限公司 | Generator rotor structure |
| CN103532274A (en) * | 2013-10-25 | 2014-01-22 | 怀化沅江电力开发有限责任公司洪江水力发电厂 | Hydraulic turbine generator rotor spider with flange hub |
| CN203617807U (en) * | 2013-10-25 | 2014-05-28 | 怀化沅江电力开发有限责任公司洪江水力发电厂 | Hydraulic turbine generator rotor spider with flange hub |
| WO2014163386A1 (en) * | 2013-04-03 | 2014-10-09 | Park Sungkoo | Water-power generator and water wheel for same |
| CN205141854U (en) * | 2015-10-26 | 2016-04-06 | 东方电气集团东方电机有限公司 | Generator flexible rotor structure |
| CN210297381U (en) * | 2019-06-13 | 2020-04-10 | 东芝水电设备（杭州）有限公司 | Bulb tubular hydraulic generator rotor support structure |
| CN111446793A (en) * | 2020-05-06 | 2020-07-24 | 哈尔滨电机厂有限责任公司 | Dynamic balance magnet yoke counterweight method for hydroelectric generating set |
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2021
- 2021-02-20 CN CN202110194399.1A patent/CN112994337B/en active Active
- 2021-02-20 CN CN202210015278.0A patent/CN114530979B/en active Active
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| CN203219037U (en) * | 2013-03-07 | 2013-09-25 | 重庆云河水电股份有限公司 | Generator rotor structure |
| WO2014163386A1 (en) * | 2013-04-03 | 2014-10-09 | Park Sungkoo | Water-power generator and water wheel for same |
| CN103532274A (en) * | 2013-10-25 | 2014-01-22 | 怀化沅江电力开发有限责任公司洪江水力发电厂 | Hydraulic turbine generator rotor spider with flange hub |
| CN203617807U (en) * | 2013-10-25 | 2014-05-28 | 怀化沅江电力开发有限责任公司洪江水力发电厂 | Hydraulic turbine generator rotor spider with flange hub |
| CN205141854U (en) * | 2015-10-26 | 2016-04-06 | 东方电气集团东方电机有限公司 | Generator flexible rotor structure |
| CN210297381U (en) * | 2019-06-13 | 2020-04-10 | 东芝水电设备（杭州）有限公司 | Bulb tubular hydraulic generator rotor support structure |
| CN111446793A (en) * | 2020-05-06 | 2020-07-24 | 哈尔滨电机厂有限责任公司 | Dynamic balance magnet yoke counterweight method for hydroelectric generating set |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112994337A (en) | 2021-06-18 |
| CN114530979A (en) | 2022-05-24 |
| CN112994337B (en) | 2022-02-18 |
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