Axial cascade electric drive with liquid current pickup

FIELD: electricity.

SUBSTANCE: axial cascade electric drive comprises two coaxially connected electric motors, besides, magnetic systems of two electric motors are made axial and are arranged in one body and on a common shaft, which is horizontally fixed in bearing units of the body, besides, by one side the stator of one electric motor is rigidly connected to the body, and on its other side between the three-phase winding and the shaft hole there are coils of controlled couplings, which are located oppositely to two rings of large and small diameters from a non-magnetic material, a rotor arranged on the bearing, at the other side of which there are ring-shaped slots, the free space of which is filled with a ferromagnetic powder. At the same time, according to the invention, the rotor of the other electric motor is arranged on the bearing and has a ledge in the form of a wide thin ring from the same material as the rotor itself, and enters the slot of the large diameter of the rotor of the other electric motor, providing when connected to the network of one coil of the controlled coupling rigid connection of the rotor of one electric motor with the rotor of the other electric motor, the stator of which is rigidly connected with the shaft, besides, between the rotor of one and rotor of the other electric motor there is a metal part arranged rigidly in the form of a hollow sleeve, with the ledge entering the slot of small diameter of the rotor of one of electric motors, providing when supplying voltage of the supply network to the other coil of the controlled coupling the rigid connection of the rotor of one of electric motors with the common shaft, which is the output one, and on the rotor of the other electric motor there is a ledge of magnetic material, which enters the body of the ferropowder coupling fixed on the body of the electric drive, besides, additionally comprising a current pickup device, the fixed part of which is rigidly fixed on the body of the electric drive, and the movable part is installed on the shaft and supplies electric energy for the widing of the stator rigidly connected to the shaft.

EFFECT: invention provides for getting high speeds of rotation, close to a double rated one at rated value of the torque value, or getting a double torque at rated speed of rotation for a different range of capacities of an electric drive with simultaneous increase of such drive operation reliability.

2 cl, 1 dwg

 

The invention relates to axial cascade electric drives rotational motion, comprising, for example, two identical axial induction motors, and can be used to create direct-drive axial cascade electric drives with variable speed from nominal to double the rated constant torque or axial cascade electric drives with double the torque at a constant nominal speed of rotation, as well as when using any other types of electric drives.

Known electric AC motors with squirrel-cage or wound rotor have only a nominal speed of rotation and torque on a shaft [Onishchenko G.B. electric drive. Textbook for high schools) RAAS. 2003. - 320. - Il. ISBN 5-85941-045-X]. Receive double time is achieved by using the same engines on one shaft, which increases the mass of the overall performance of the electric actuator. Getting double the speed of rotation is achieved by the use of different gears, which complicates the electric actuator and reduces its reliability. However, the application of these two methods does not solve the problem of getting double speed at constant torque or twice the torque at a constant speed in one device.

Known controlled cascade electric drive consisting of two coaxially mounted induction motors. The stator of the first motor is stationary and the stator of the second - with the possibility of free rotation around the shaft. The rotor of the first electric motor has the capability of free rotation around the shaft, and the second rotor fixedly mounted on the shaft. (U.S. Pat. No. 2173927, 2000).

And this device has disadvantages. Electric actuator provides for double speed at constant torque and twice the torque at a constant speed of rotation. However, without additional ferropericlase couplings may occur malfunction of the actuator. Using the standard node of the power drive may result in frequent breakage of the site, especially at high power drive. All this is nijaat reliability and probability of failure of the device, what can cause electric drive.

The task of the invention to provide an axial cascade electric actuator with liquid power collection, providing the necessary Electromechanical characteristics in more reliable operation.

The technical result is to obtain high speeds of rotation, close to twice rated at the nominal value of the moment or getting double moment at rated speed.

The technical result is achieved in that the axial cascade electric drive containing two connected coaxially of the motor, and the magnetic system of two axial motors are designed and located in the same building and on a common shaft which is horizontally fixed in bearing assemblies corps, and on one side of the stator of one of the electric motor is rigidly connected to the housing, and on the other side between the three-phase winding and friction hole coils are controlled clutches, located opposite the two rings of large and small diameters of the non-magnetic material located on the bearing of the rotor, on the other hand which made the annular gap, the space which is filled with a ferromagnetic powder, the other rotor e is tradigital is located on the bearing and has a protrusion in the form of a broad thin ring of the same material, the rotor and enters the slit large diameter of the rotor of the other motor, ensuring the network connectivity of one coil driven clutch rigid connection of the rotor of one of the motor with the rotor of the other motor, the stator of which is rigidly connected with the shaft, and between the one rotor and the other rotor of the motor is rigidly attached to the shaft of the metal part in the form of a hollow glass ledge calling at the crack of small rotor diameter of one of the electric motors that provide when applying the mains voltage in the other coil driven clutch rigid connection of the rotor of one of the motors with a common shaft which is an output and the rotor another motor is the projection of the magnetic material entering the body verropoulou coupling attached to the housing of an electric drive, in addition to containing the collector device, the stationary part of which is rigidly fixed to the housing of the electric actuator, and the movable part mounted on the shaft and carries a supply of electrical energy to the windings of the stator rigidly connected with the shaft.

Axial cascade electric drive contains on the shaft three-phase liquid collector device mounted on a common shaft, fixed to the body electric is on the drive and carrying food to the stator of one of the motors.

The proposed device illustrated in the drawing, in which figure 1 shows a General view of the device.

Axial cascade electric actuator consists of a shaft 1 mounted on bearings 2. Bearings 2 mounted on the housing of the electric actuator 3. Housing 3 is fixed to the stator 4 with its winding 5 by screws 6. In the stator 4 are coil 7 and the coil 8 is controlled clutches. On the shaft 1 has a rotor 9 with its winding 10 on the bearing 11 with the possibility of free rotation relative to the shaft 1. The rotor 9 are non-magnetic ring 12 and non-magnetic ring 13 also has an annular slit 14 and the annular slit 15 of different diameters, which covered the ferromagnetic powder 16. On the shaft 1 is rigidly fixed to the metal part in the form of a hollow Cup 17, the tab setting in the annular gap 14. On the shaft 1 has a rotor 18 with its winding 19 on the bearing 20, with the possibility of free rotation relative to the shaft 1. The rotor 18 has a protrusion 21 that is made of the same material as the magnetic core of the rotor 18, which enters the annular gap 15. The rotor 18 is the projection of the magnetic material 22, which enters the body verropoulou clutch 23, fixed to the body 3 by means of screws 24. The stator 25 with its winding 26 is rigidly fixed on the shaft 1. On the housing 3 fixed liquid collector device is TWT 27 by screws 28, feeding the winding 26 of the stator 25. Moreover, the rotating part 29 liquid collector device 27 is rigidly fixed on the shaft 1 and rotates with the shaft 1.

The principle of operation

To obtain the doubled value of the rotation speed nominal value of the torque necessary to produce the control electromagnetic couplings in the following order. Serves the supply voltage to the coil 7 of the electromagnetic clutch and disconnecting the coil 8 of the electromagnetic clutch and ferropericlase clutch 23. When the stator 4 is fixed, the rotor 9 and the rotor 18 are connected together and rotate with asynchronous velocity relative to the stator 4. The stator 25 with the shaft 1 is rotated relative to the rotor 9 and 18 with the same asynchronous speed. The result on the shaft 1 twice the value of the rotation speed nominal value of the torque.

To get twice the value of the torque at rated speed must be controlled electromagnetic couplings in the following order. Serves the supply voltage to the coil 8 of the electromagnetic clutch and ferropericlase clutch 23 and the detachable coil 7 of the electromagnetic clutch. When the stator 4 and the rotor 18 remain stationary, and the rotor 9 is fixedly connected with the shaft 1, and a stator 25 are rotated (together)with the same asynchronous speed. In the end developed the double point on the shaft 1 from the two induction motors at rated speed.

The use of the proposed solutions will improve the efficiency and reliability of the system electromagnetic couplings, as well as to improve the reliability of the power system of an electric drive, which will improve the reliability and performance of the cascade electric drive in General. When you increase the number of engines it will be possible to obtain higher values of torque and speed.

The invention will find application in industry, mechanical engineering, machine building, transport, etc.

1. Managed cascading electric drive containing two connected coaxially of the motor, and the magnetic system of two axial motors are designed and located in the same building and on a common shaft which is horizontally fixed in bearing assemblies corps, and on one side of the stator of one of the electric motor is rigidly connected to the housing, and on the other side between the three-phase winding and friction hole coils are controlled clutches, located opposite the two rings of large and small diameters of the non-magnetic material located on the bearing of the rotor of the motor, on the other hand which made the annular gap, the space which is filled with a ferromagnetic powder, characterized in that that the rotor of the other motor is located on under the IPrice and has a protrusion in the form of a broad thin ring of the same material, the rotor and enters the slit large diameter of the rotor of the other motor, ensuring the network connectivity of one coil driven clutch rigid connection of the rotor of one of the motor with the rotor of the other motor, the stator of which is rigidly connected with the shaft, and between the one rotor and the other rotor of the motor is rigidly attached to the shaft of the metal part in the form of a hollow glass ledge calling at the crack of small rotor diameter of one of the electric motors that provide when applying the mains voltage in the other coil driven clutch rigid connection of the rotor of this motor with a common shaft which is an output and the other rotor the motor is the projection of the magnetic material entering the body verropoulou coupling attached to the housing of an electric drive, in addition to containing the collector device, the stationary part of which is rigidly fixed to the housing of the electric actuator, and the movable part mounted on the shaft and carries a supply of electrical energy to the windings of the stator rigidly connected with the shaft.

2. Managed cascading electric actuator according to claim 1, characterized in that the power to the stator of one of the motors is carried out through a three-phase liquid collector is a device, mounted on a common shaft and fixed to the body of an electric drive.



 

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