Cross-flow motor rotor with high starting torque

Abstract

The invention discloses a high-starting-torque cross-flow motor rotor, belongs to the field of cross-flow motors, and aims to solve the problems of an existing cross-flow motor. The rotor comprises an excitation winding, a magnetic pole iron core, a rotor yoke part, a non-rotating-shaft type water guide blade and a connecting unit, the rotor yoke part is of a circular ring structure, m magnetic pole through holes are evenly distributed in the rotor yoke part in the circumferential direction, the m magnetic pole iron cores are inserted into the m magnetic pole through holes in the radial direction, the m magnetic pole iron cores and the inner surface of the rotor yoke part are located on the same circumferential face, rotor teeth are formed in the portions, extending out of the outer circle side of the rotor yoke part, of the magnetic pole iron cores, and excitation windings are wound on the tooth roots of the rotor teeth. A non-rotating-shaft type water guide blade is arranged on the inner circle surface of each magnetic pole iron core through a connecting unit.

Description

Technical Field

[0001] The present invention relates to a cross-flow motor rotor with high starting torque, belonging to the field of cross-flow motors. Background Art

[0002] Since the cross-flow motor needs to start and stop frequently, the requirement for its starting performance is relatively high. However, the traditional cross-flow unit requires multiple structural parts such as a speed governor, which reduces the efficiency of transmission from the runner to the motor, and the energy loss is relatively serious. In addition, the surface loss on the air-gap side of the cross-flow motor rotor is large, and it is easy to have the problem of high rotor surface temperature. Moreover, due to the rotor slotting, harmonics will appear, thus affecting the stability of the motor operation. Therefore, for the above deficiencies, it is urgent to develop a cross-flow motor rotor with high starting torque. Summary of the Invention

[0003] Aiming at the problems existing in the existing cross-flow motors, the present invention provides a cross-flow motor rotor with high starting torque.

[0004] The cross-flow motor rotor with high starting torque of the present invention includes an exciting winding 2, a pole core 3, a rotor yoke 4, a shaftless water guide vane 5 and a connecting unit;

[0005] The rotor yoke 4 is of a circular ring structure. The rotor yoke 4 is evenly provided with m pole through holes 13 in the circumferential direction. m pole cores 3 are inserted into the m pole through holes 13 in the radial direction. The m pole cores 3 and the inner surface of the rotor yoke 4 are on the same circumferential surface. The protruding part of the pole core 3 on the outer circle side of the rotor yoke 4 forms a rotor tooth. The exciting winding 2 is wound around the tooth root of the rotor tooth. A shaftless water guide vane 5 is arranged on the inner circular surface of each pole core 3 by using the connecting unit.

[0006] Preferably, the connecting unit includes a sector-shaped copper plate 8, a half-sector-shaped copper plate 9, an axial connecting rod 11 and a radial connecting rod 12;

[0007] n C-shaped axial through holes 6 are arranged in the upper region of the pole core 3. The C-shaped axial through holes 6 are close to the outer circular surface side of the pole core 3. The C-shaped axial through holes 6 are arranged in pairs in a mirror image manner. n radial slide holes 7 are arranged inside the pole core 3. The top of each radial slide hole 7 is communicated with a C-shaped axial through hole 6. The bottom of the radial slide hole 7 opens on the inner circular surface of the pole core 3;

[0008] The cross section of the axial connecting rod 11 is a semi-circular ring. n axial connecting rods 11 are inserted into the n C-shaped axial through holes 6 and protrude from the axial front and rear end faces of the pole core 3; the axial connecting rod 11 is fixed by being clamped into the sector-shaped copper plate 8 at the axial front end face of the pole core 3, and the axial connecting rod 11 is fixed by being fixedly connected with the half-sector-shaped copper plate 9 at the axial rear end face of the pole core 3;

[0009] n radial connecting rods 12 are inserted into n radial slideway holes 7 from the bottom of the pole core 3. The top of the radial connecting rod 12 has a locking hook, and the semi-circular rotating buckle of the axial connecting rod 11 is rotated into the locking hook of the radial connecting rod 12 to realize the fixed connection between the two; the bottoms of the n radial connecting rods 12 are fixedly connected to a non-rotating shaft water guide vane 5 together.

[0010] Preferably, it further includes a limit block 10. The limit block 10 is arranged on the axial rear end face of the pole core 3, and a limit block 10 is arranged at the joint of each pair of half-sector copper plates 9.

[0011] A pair of C-shaped axial through holes 6 are respectively inserted into the two axial connecting rods 11. The two half-sector copper plates 9 drive the two axial connecting rods 11 to rotate clockwise and counterclockwise respectively, so that when the axial connecting rod 11 and the radial connecting rod 12 are locked, the two half-sector copper plates 9 are joined together, and the fixed connection is realized through the limit block 10 at the joint of the two.

[0012] Preferably, the n radial slideway holes 7 are arranged in a row along the circumferential direction and are located at the center position of the pole core 3.

[0013] Preferably, the n radial slideway holes 7 are arranged in a staggered manner in the middle area of the pole core 3.

[0014] Preferably, it further includes a magnetic conductive cover plate 1. A circular magnetic conductive cover plate 1 is arranged at each of the front and rear shaft end faces of the rotor, and the limit block 10 is fixedly welded to the magnetic conductive cover plate 1.

[0015] Preferably, the sector copper plates 8 are distributed in one row or two rows, and the distribution rule is: evenly distributed in the same row and staggered in different rows.

[0016] Advantages of the present invention:

[0017] 1. The motor of the present invention is small in size, simple to assemble and convenient for later maintenance.

[0018] 2. The present invention effectively shortens the starting time.

[0019] 3. The present invention reduces the tooth harmonics caused by slotting and effectively reduces the noise during the operation of the tubular turbine unit.

[0020] 4. The surface temperature of the rotor core of the present invention is low. Description of the drawings

[0021] Figure 1 is the front view of a tubular motor rotor with high starting torque according to the present invention;

[0022] Figure 2 is the structural schematic diagram of a tubular motor rotor with high starting torque according to the present invention, without the magnetic conductive cover plate;

[0023] Figure 3Yes Figure 1 Side view;

[0024] Figure 4 Front view of the magnetic pole core;

[0025] Figure 5 Yes Figure 4 Central radial sectional view;

[0026] Figure 6 Schematic structural diagram of the sector copper plate installed on the front end face of the magnetic pole core;

[0027] Figure 7 Schematic structural diagram of the half-sector copper plate installed on the rear end face of the magnetic pole core;

[0028] Figure 8 Yes Figure 3 Radial sectional view, only showing the upper half structure;

[0029] Figure 9 Yes Figure 5 Schematic structural diagram of fixing the fan using the radial connecting rod on the basis of;

[0030] Figure 10 Schematic three-dimensional structure diagram of the cooperation of two trapezoidal copper plates;

[0031] Figure 11 Schematic three-dimensional structure diagram of the rotor yoke.

[0032] 1. Magnetic conduction cover plate, 2. Excitation winding, 3. Magnetic pole core, 4. Rotor yoke, 5. Non-rotating shaft type water guiding vane, 6. C-shaped axial through hole, 7. Radial slideway hole, 8. Sector copper plate, 9. Half-sector copper plate, 10. Limit block, 11. Semi-circular ring-shaped axial connecting rod, 12. Radial connecting rod, 13. Magnetic pole through hole. Specific embodiments

[0033] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0035] Next, the present invention will be further described in conjunction with the accompanying drawings and specific embodiments, but it is not a limitation of the present invention.

[0036] Specific embodiment 1: Next, in conjunction with Figures 1 to 11Regarding this embodiment, a cross-flow motor rotor with high starting torque in this embodiment includes an exciting winding 2, a pole core 3, a rotor yoke 4, a shaftless water guiding vane 5, and a connecting unit;

[0037] The rotor yoke 4 is of a circular ring structure. The rotor yoke 4 is evenly distributed with m pole through holes 13 in the circumferential direction. m pole cores 3 are inserted into the m pole through holes 13 in the radial direction. The m pole cores 3 and the inner surface of the rotor yoke 4 are on the same circumferential surface. The protruding part of the pole core 3 on the outer circle side of the rotor yoke 4 forms a rotor tooth. The exciting winding 2 is wound around the tooth root of the rotor tooth. A shaftless water guiding vane 5 is arranged on the inner circular surface of each pole core 3 by using the connecting unit. The shaftless water guiding vane 5 is fixed to the connecting unit by welding.

[0038] The connecting unit includes a sector copper plate 8, a half-sector copper plate 9, an axial connecting rod 11, and a radial connecting rod 12;

[0039] n C-shaped axial through holes 6 are arranged in the upper region of the pole core 3. The C-shaped axial through holes 6 are close to the outer circular surface side of the pole core 3. The C-shaped axial through holes 6 are arranged in pairs in a mirror image manner. n radial slide holes 7 are arranged inside the pole core 3. The top of each radial slide hole 7 communicates with a C-shaped axial through hole 6. The bottom of the radial slide hole 7 opens on the inner circular surface of the pole core 3;

[0040] The cross-section of the axial connecting rod 11 is a semi-circular ring. n axial connecting rods 11 are inserted into the n C-shaped axial through holes 6 and protrude from the axial front and rear end faces of the pole core 3; the axial connecting rod 11 is fixed by being snapped into the sector copper plate 8 at the axial front end face of the pole core 3, and the axial connecting rod 11 is fixed by being fixedly connected to the half-sector copper plate 9 at the axial rear end face of the pole core 3;

[0041] n radial connecting rods 12 are inserted into the n radial slide holes 7 from the bottom of the pole core 3. The top of the radial connecting rod 12 has a locking hook. The semi-circular ring of the axial connecting rod 11 is rotated and buckled into the locking hook of the radial connecting rod 12 to realize the fixed connection between the two; the bottoms of the n radial connecting rods 12 are fixedly connected to a shaftless water guiding vane 5 together. The shaftless water guiding vane 5 is in direct contact with the water flow, effectively cooling the pole core 3 and the rotor yoke 4.

[0042] It further includes a limiting block 10. The limiting block 10 is arranged at the axial rear end face of the pole core 3, and a limiting block 10 is arranged at the joint of each pair of half-sector copper plates 9;

[0043] A pair of C-shaped axial through-holes 6 are respectively inserted into two axial connecting rods 11. Two semi-circular sector-shaped copper plates 9 drive these two axial connecting rods 11 to rotate clockwise and counterclockwise respectively, so that when the axial connecting rod 11 and the radial connecting rod 12 are locked, the two semi-circular sector-shaped copper plates 9 are joined together, and a fixed connection is achieved through the limiting block 10 at the joint of the two.

[0044] The C-shaped axial through-holes 6 are not placed on the outer surface of the pole core 3, reducing the tooth harmonics caused by slotting and lowering the noise during the operation of the cross-flow motor.

[0045] The axial connecting rod 11 can pass through the pole core 3 in the axial direction, which is beneficial to the overall installation.

[0046] Moreover, the cross-sectional area of the axial connecting rod 11 near the outer circle side of the pole core 3 is smaller than the cross-sectional area of the axial connecting rod 11 near the inner circle side of the pole core 3. When starting, the current is mainly distributed in the axial connecting rod 11 near the outer circle side of the pole core 3, resulting in a large starting torque. When the motor gradually speeds up, the current is mainly distributed in the axial connecting rod 11 near the inner circle side of the pole core 3, which can ensure the basic operation of the motor.

[0047] n radial slideway holes 7 are arranged in a row along the circumferential direction and are located at the exact center position of the pole core 3.

[0048] The n radial slideway holes 7 are staggeredly arranged in the middle area of the pole core 3.

[0049] The sector-shaped copper plates 8 are distributed in one row or two rows, and the distribution rule is: evenly distributed in the same row and staggered in different rows. This staggered setting ensures the installation path of the radial connecting rod 12, and the space at the top of the radial slideway hole 7 can also accommodate the space for the axial connecting rod 11 to rotate 90 degrees clockwise and counterclockwise at the same time.

[0050] It also includes a magnetic conductive cover plate 1. A circular magnetic conductive cover plate 1 is arranged at each of the front and rear shaft end faces of the rotor. The limiting block 10 is fixedly welded to the magnetic conductive cover plate 1. The magnetic conductive cover plate 1 is thermally sleeved on the outer side of the pole yoke 4 in the radial direction.

[0051] The overall volume of the motor is small, the assembly is simple, and the later maintenance is convenient. Moreover, the two semi-circular sector-shaped copper plates 9 are joined together. Through the limitation of the limiting block 10 at the top, the air volume outside the pole core 3 in the radial direction can be increased, the temperature outside the pole core 3 in the radial direction can be effectively reduced, and the limiting block 10 can effectively carry out flow splitting, which can effectively reduce the temperature of the axial connecting rod 11.

[0052] Both the magnetic conductive cover plate 1 and the limiting block 10 are made of magnetic conductive materials. The use of the magnetic conductive end cover 1 can effectively reduce the leakage reactance at the rotor end, which is more conducive to the starting of the cross-flow unit.

[0053] The axial connecting rod 11 on the outer circumferential side of the magnetic pole core 3 is made of brass, and the axial connecting rod 11 on the inner circumferential side of the magnetic pole core 3 is made of red copper. By rotating a pair of axial connecting rods 11 90 degrees clockwise and counterclockwise in a pair of C-shaped axial through holes 6, a pair of semi-sector-shaped copper plates 9 are buckled and contacted, and an electric circuit is jointly formed by the axial connecting rod 11 and the sector-shaped copper plate 8. Similarly, other pairs of structures also form electric circuits, so that an induced current is formed in the closed circuit when the motor starts, which is beneficial to the starting of the motor. Moreover, the transmission device is omitted, and the guide vane is combined with the rotor core, effectively reducing the energy loss.

[0054] Although the present invention has been described herein with reference to particular embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Accordingly, it should be understood that numerous modifications may be made to the exemplary embodiments, and other arrangements may be designed, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein may be combined in a manner different from that described in the original claims. It should also be understood that the features described in connection with a separate embodiment may be used in other described embodiments.

Claims

1. A cross-flow motor rotor with high starting torque, characterized in that, It includes an exciting winding (2), a pole core (3), a rotor yoke (4), a shaftless water guide vane (5) and a connecting unit; The rotor yoke (4) is of an annular structure. The rotor yoke (4) is evenly distributed with m pole through-holes (13) in the circumferential direction. m pole cores (3) are inserted into the m pole through-holes (13) in the radial direction. The m pole cores (3) and the inner surface of the rotor yoke (4) are on the same circumferential surface. The extended part of the pole core (3) on the outer circle side of the rotor yoke (4) forms a rotor tooth. The exciting winding (2) is wound around the tooth root of the rotor tooth. A shaftless water guide vane (5) is arranged on the inner circular surface of each pole core (3) by using the connecting unit.

2. The cross-flow motor rotor with high starting torque according to claim 1, characterized in that, The connecting unit includes a sector copper plate (8), a half-sector copper plate (9), an axial connecting rod (11) and a radial connecting rod (12); In the upper region of the pole core (3), n C-shaped axial through-holes (6) are arranged. The C-shaped axial through-holes (6) are close to the outer circular surface side of the pole core (3). The C-shaped axial through-holes (6) are arranged in pairs in a mirror image manner. n radial slide holes (7) are arranged inside the pole core (3). The top of each radial slide hole (7) communicates with a C-shaped axial through-hole (6). The bottom of the radial slide hole (7) opens on the inner circular surface of the pole core (3); The cross-section of the axial connecting rod (11) is a semi-annular shape. n axial connecting rods (11) are inserted into the n C-shaped axial through-holes (6) and extend out of the axial front and rear end faces of the pole core (3). The axial connecting rod (11) is fixed by being clamped into the sector copper plate (8) at the axial front end face of the pole core (3). The axial connecting rod (11) is fixed by being fixedly connected with the half-sector copper plate (9) at the axial rear end face of the pole core (3); n radial connecting rods (12) are inserted into the n radial slide holes (7) from the bottom of the pole core (3). The top of the radial connecting rod (12) has a locking hook. The semi-circular ring of the axial connecting rod (11) is rotated and buckled into the locking hook of the radial connecting rod (12) to realize the fixed connection between the two. The bottoms of the n radial connecting rods (12) are fixedly connected to a shaftless water guide vane (5) together.

3. The cross-flow motor rotor with high starting torque according to claim 2, characterized in that, It further includes a limit block (10). The limit block (10) is arranged on the axial rear end face of the pole core (3). A limit block (10) is arranged at the joint of each pair of half-sector copper plates (9); A pair of C-shaped axial through-holes (6) respectively insert two axial connecting rods (11). The two half-sector copper plates (9) drive the two axial connecting rods (11) to rotate clockwise and counterclockwise respectively, so that when the axial connecting rod (11) and the radial connecting rod (12) are locked, the two half-sector copper plates (9) are joined together and are fixedly connected through the limit block (10) at their joint.

4. The through-flow motor rotor with high starting torque according to claim 3, characterized in that, The n radial slide holes (7) are arranged in a row along the circumferential direction and are located at the center position of the pole core (3).

5. A cross-flow motor rotor with high starting torque according to claim 3, characterized in that, The n radial slide holes (7) are arranged in a staggered manner in the middle region of the pole core (3).

6. The cross-flow motor rotor with high starting torque according to claim 4 or 5, characterized in that, It further includes a magnetic conductive cover plate (1). A circular magnetic conductive cover plate (1) is arranged at each of the front and rear shaft end faces of the rotor. The limit block (10) is fixedly welded to the magnetic conductive cover plate (1).

7. The cross-flow motor rotor with high starting torque according to claim 2, characterized in that, The fan-shaped copper plates (8) are distributed in one or two rows, and the distribution rule is: evenly distributed in the same row and staggered in different rows.

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