High-speed hydraulic generator rotor

Abstract

The utility model relates to the technical field of hydro-generators, and discloses a high-speed hydro-generator rotor, which comprises magnetic poles, magnet yokes and a main shaft, the main shaft is connected with a plurality of magnet yokes, two adjacent magnet yokes are arranged at intervals, the magnetic poles are connected onto the magnet yokes, and the high-speed hydro-generator rotor is characterized in that two adjacent magnet yokes are connected through a base plate, and the base plate is connected with the main shaft through a bearing. And the magnetic pole is connected to the magnet yoke and the base plate at the same time. Material fatigue and crack formation are avoided, gaps are eliminated, the stress level of the area is reduced, and therefore the overall stability and safety of the structure are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water turbine generator technical field, concretely relates to a high -speed water turbine generator rotor. BACKGROUND

[0002] Water turbine generator rotor is the rotating part of water turbine generator, and the rotor is composed of a rotating shaft, a support, a magnetic yoke, magnetic poles and a current collecting device to generate a magnetic field, transform energy and transmit torque.

[0003] Chinese patent document CN2927459Y discloses a medium-high speed large capacity water turbine generator set rotor structure, and the rotor structure is a component part of a shaft system and a ventilation system. The shaft system is composed of a generator rotor body, a generator main shaft, a water turbine main shaft and a runner, and a rotor support, a magnetic yoke and magnetic poles form a pressure source for radial ventilation.

[0004] Chinese patent document CN201113599Y discloses a water turbine generator rotor hybrid ventilation device, and a hybrid ventilation structure of a rotor magnetic yoke ventilation structure is adopted, that is, a magnetic yoke ventilation groove and a gap between magnetic yoke sheets are mixed to supply air, a gap is left between a rotor magnetic pole coil and a magnetic yoke, an inlet is at a rotor support, and an outlet is between two magnetic poles. In the same ventilation groove, there are air outlets between each magnetic pole, and there are gaps between magnetic poles of the same sheet.

[0005] Chinese patent document CN201113599Y has the following disadvantages: when the rotor rotates at high speed, centrifugal force is generated, the connection between the magnetic pole and the magnetic yoke bears the centrifugal force of the entire magnetic pole, stress concentration occurs at the connection, and cracking occurs, thereby bringing potential safety hazards to the unit. UTILITY MODEL CONTENTS

[0006] The utility model discloses a high speed water turbine generator rotor to solve the technical problem of high stress at the connection between the magnetic pole and the magnetic yoke, and provides a high speed water turbine generator rotor, which comprises a magnetic pole, a magnetic yoke and a main shaft, the main shaft is connected with a plurality of the magnetic yokes, two adjacent magnetic yokes are arranged at intervals, and the magnetic pole is connected to the magnetic yoke.

[0007] In order to facilitate connection, a connecting groove is arranged on the magnetic yoke and the backing plate, and the magnetic pole is connected to the connecting groove through a connecting piece.

[0008] Preferably, the connecting groove is a T-shaped groove, and the connecting piece is a T-shaped connecting piece.

[0009] Preferably, the T-shaped connecting piece is fixed in the T-shaped groove through a skew key.

[0010] In order to facilitate ventilation and cooling, the backing plate is a multi-petal structure, and a radial ventilation groove is left between each backing plate.

[0011] Preferably, the radial ventilation groove is communicated with an axial ventilation hole, and the axial ventilation hole penetrates the magnetic yoke.

[0012] In order to improve the overall strength, each of the backing plates is triangular.

[0013] In order to facilitate the bolt on the magnetic yoke, the backing plate is provided with an inner and outer clearance hole.

[0014] In order to improve the overall strength and stability, the backing plate is welded to the adjacent magnetic yoke.

[0015] The utility model has the following beneficial effects:

[0016] 1. The water turbine generator rotor has high speed, high ventilation requirements and other characteristics, these operating characteristics make the magnetic pole and the magnetic yoke connection place bear large dynamic load when the unit is running, in the prior art, the magnetic pole and the magnetic yoke connection place is provided with a ventilation groove for facilitating ventilation, the traditional design is the air guide belt structure, the fixation of the magnetic pole is not continuous at the ventilation groove, thereby more easily generating stress concentration. The utility model increases the backing plate between the magnetic yokes, makes the connection place of the magnetic pole and the magnetic yoke have no gap, the backing plate and the magnetic yoke are an integral whole to avoid the generation of stress concentration, and further avoid the formation of material fatigue and crack, by eliminating the gap, the stress level of this area can be reduced, thereby improving the overall stability and safety of the structure. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the high-speed water turbine generator rotor embodiment of the utility model;

[0018] Figure 2 It is Figure 1 the partial sectional view. DETAILED DESCRIPTION

[0019] The following is further described in detail through specific embodiments:

[0020] The reference signs in the drawings of the specification include: magnetic pole 1, magnetic yoke 2, main shaft 3, backing plate 4, T-shaped groove 5, T-shaped connecting piece 6, inclined key 7, radial ventilation groove 8, axial ventilation hole 9, connecting bolt 10, outer clearance hole 11, inner clearance hole 12.

[0021] Embodiment 1

[0022] As Figure 1 and 2As shown, a high-speed water turbine rotor comprises magnetic poles 1, magnetic yokes 2 and main shafts 3, the main shafts 3 are connected with a plurality of the magnetic yokes 2, gaps are arranged between two adjacent magnetic yokes 2, the magnetic poles 1 are connected on the magnetic yokes 2, two adjacent magnetic yokes 2 are connected through a gusset plate 4, and the magnetic poles 1 are connected on the magnetic yokes 2 and the gusset plate 4.

[0023] T-shaped grooves 5 are arranged on the magnetic yokes 2 and the gusset plate 4, and the magnetic poles 1 are connected in the T-shaped grooves 5 through T-shaped connecting pieces 6.

[0024] The T-shaped connecting pieces 6 are fixed in the T-shaped grooves 5 through inclined keys 7, the length of the T-shaped grooves 5 is longer than that of the T-shaped connecting pieces 6, the T-shaped connecting pieces 6 are inserted into the T-shaped grooves 5, and then the inclined keys 7 are fastened in the gaps between the T-shaped grooves 5 and the T-shaped connecting pieces 6.

[0025] The gusset plate 4 is a multi-petal structure, and radial ventilation grooves 8 are arranged between each gusset plate 4.

[0026] The radial ventilation grooves 8 are communicated with axial ventilation holes 9, and the axial ventilation holes 9 pass through the magnetic yokes 2.

[0027] Each gusset plate 4 is triangular.

[0028] A plurality of connecting bolts 10 are arranged on the magnetic yokes 2 in the axial direction, outer allowance holes 11 and inner allowance holes 12 are arranged on the gusset plate 4, and the head and tail of the connecting bolts 10 are arranged in the outer allowance holes 11 and the inner allowance holes 12, respectively.

[0029] The outer edge of the gusset plate 4, the inner edge of the outer allowance hole 11 and the inner allowance hole 12 and the adjacent magnetic yoke 2 are welded.

[0030] The gusset plate 4 is arranged in the gap between the magnetic yokes 2, so that there is no gap at the connection between the magnetic pole 1 and the magnetic yoke 2, but the ventilation and heat dissipation are not affected, the formation of material fatigue and cracks is avoided, the gap is eliminated, the stress level of this area is reduced, and the overall stability and safety of the structure are improved.

[0031] The above-mentioned is only the embodiment of the present application, and the common knowledge of the specific structure and characteristics in the scheme is not described in detail, the ordinary skilled person in the art knows all the ordinary technical knowledge in the technical field of the present application before the application date or the priority date, can know all the prior art in the field, and has the ability to apply the conventional experimental means before the date, the ordinary skilled person in the art can improve and implement the present scheme under the enlightenment given in the present application, and some typical known structures or known methods should not become an obstacle for the ordinary skilled person in the art to implement the present application. It should be pointed out that for the skilled person in the art, without departing from the structure of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, which will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A high-speed hydro-generator rotor, comprising magnetic poles, magnetic yokes, and a main shaft, wherein the main shaft connects to a plurality of magnetic yokes, two adjacent magnetic yokes are spaced apart, and the magnetic poles are connected to the magnetic yokes, characterized in that, Two adjacent magnetic yokes are connected by a pad, and the magnetic poles are connected to both the magnetic yoke and the pad.

2. The high-speed hydro-generator rotor according to claim 1, characterized in that: The magnetic yoke and the pad are provided with connecting grooves, and the magnetic poles are connected in the connecting grooves by connectors.

3. The high-speed hydro-generator rotor according to claim 2, characterized in that: The connecting groove is a T-shaped groove, and the connector is a T-shaped connector.

4. The high-speed hydro-generator rotor according to claim 3, characterized in that: The T-shaped connector is fixed in the T-shaped groove by a slanted key.

5. The high-speed hydro-generator rotor according to claim 4, characterized in that: The pad has a multi-lobed structure, with radial ventilation grooves between each pad.

6. The high-speed hydro-generator rotor according to claim 5, characterized in that: The radial ventilation groove connects to the axial ventilation hole, which passes through the magnetic yoke.

7. The high-speed hydro-generator rotor according to claim 6, characterized in that: Each of the pads is triangular in shape.

8. The high-speed hydro-generator rotor according to claim 7, characterized in that: The pad is provided with an inner clearance hole and an outer clearance hole.

9. The high-speed hydro-generator rotor according to claim 8, characterized in that: The pad is welded to the adjacent magnetic yoke.

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