CN219554843U - Multi-motor driving system and crusher comprising same - Google Patents

Abstract

The utility model discloses a multi-motor driving system and a crusher comprising the same. The multi-motor drive system includes: a rotating shaft; the main motor is in driving connection with the rotating shaft; the starting device is connected with the motor and used for controlling the starting of the main motor; the auxiliary motor is in driving connection with the rotating shaft; the control switch is connected with the auxiliary motor and used for controlling the start and stop of the auxiliary motor; the rotating speed detection device is used for detecting the rotating speeds of the rotating shaft and the rotor shaft of the auxiliary motor; and the controller is connected with the rotating speed detection device and controls the opening and closing of the control switch according to the detection result of the rotating speed detection device. According to the utility model, the main motor and the auxiliary motor are started successively, only the main motor needs to be started through the starting device, the main motor drives the rotating shaft to rotate after being started, the rotating shaft drives the rotor shaft of the auxiliary motor to rotate, and the auxiliary motor is electrified after the rotating speed of the rotor shaft reaches the power frequency rotating speed, so that the starting can be completed, and the rotating speed synchronization of all the motors can be ensured.

Description

Multi-motor driving system and crusher comprising same

Technical Field

The utility model relates to the technical field of motor driving, in particular to a multi-motor driving system and a crusher comprising the same.

Background

In some devices torque is increased by using multiple motors to synchronously drive the rotational motion of a shaft or the same workpiece, which requires multiple motors to start and operate at a basic rotational speed. The current common starting modes of a single high-power motor are water resistance starting, solid state soft starting and frequency converter starting. Because the high-power motor has long starting time, the requirements of basic rotation speed synchronization cannot be met by the water resistance starting or solid state soft starting of a plurality of high-power motors, and the situation of mutual pulling can be formed. Therefore, a plurality of high-power motors are started synchronously by adopting a frequency converter, and the frequency converter is started, so that the defects of high price and weak current impact resistance exist, and the equipment requirement cannot be well met.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model innovatively provides a multi-motor driving system and a crusher comprising the same, and can solve the technical problems of complex synchronous starting control and high cost of the multi-motor driving system in the prior art.

To achieve the above object, a first aspect of the present utility model discloses a multi-motor driving system, comprising:

a rotating shaft;

the main motor is in driving connection with the rotating shaft;

the starting device is connected with the main motor and used for controlling the starting of the main motor;

the auxiliary motor is in driving connection with the rotating shaft;

the control switch is connected with the auxiliary motor and used for controlling the start and stop of the auxiliary motor;

a rotation speed detecting device for detecting rotation speeds of the rotation shaft and a rotor shaft of the auxiliary motor;

and the controller is connected with the rotating speed detection device and controls the opening and closing of the control switch according to the detection result of the rotating speed detection device.

Further, the starting device is a water resistance starting cabinet or a solid soft starting cabinet.

Further, the control switch is a power switch and is used for controlling the on-off of the power supply of the auxiliary motor.

Further, the rotation speed detection device comprises a first rotation speed sensor and a second rotation speed sensor, wherein the first rotation speed sensor is used for detecting the rotation speed of the rotation shaft, and the second rotation speed sensor is used for detecting the rotation speed of the rotor shaft of the auxiliary motor.

Further, a first belt pulley and a second belt pulley are respectively arranged at two ends of the rotating shaft, a rotor shaft of the main motor is connected with the first belt pulley through a belt, and a rotor shaft of the auxiliary motor is connected with the second belt pulley through a belt.

Further, the main motor is a winding motor or a squirrel cage motor,

the auxiliary motor is a squirrel cage motor.

Further, a plurality of auxiliary motors are arranged, the auxiliary motors are all in driving connection with the rotating shaft,

each auxiliary motor is correspondingly provided with a control switch connected with the auxiliary motor, and each auxiliary motor is provided with a second rotating speed sensor.

In a second aspect the utility model discloses a crusher comprising a multi-motor drive system as described above,

the rotating shaft forms a main shaft of the crusher.

Further, the crusher comprises a frame and a box body, the main shaft is rotatably arranged on the box body, the box body is arranged on the frame,

the main motor and the auxiliary motor are arranged on two sides of the box body and mounted on the frame, the first end of the main shaft is provided with the first belt pulley, the main motor is connected with the first belt pulley through a belt, the second end of the main shaft is provided with the second belt pulley, and the auxiliary motor is connected with the second belt pulley through a belt.

The beneficial effects of the utility model are as follows:

according to the multi-motor driving system provided by the utility model, the main motor and the auxiliary motor are started successively, and only the main motor needs to be started through the starting device, so that a water resistance starting cabinet or a solid soft starting cabinet with lower cost can be used as the starting device for starting and controlling the main motor. The main motor drives the rotating shaft to rotate after starting, the rotating shaft drives the rotor shaft of the auxiliary motor to rotate, and the auxiliary motor is electrified to finish starting after the rotating speed of the rotor shaft reaches the power frequency rotating speed, so that the generation of impact current caused by the starting of the auxiliary motor can be avoided, and the stability of each motor and power supply is ensured.

Drawings

FIG. 1 is a schematic diagram of a multi-motor drive system according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a multi-motor drive system according to another embodiment of the present utility model;

fig. 3 shows a schematic structural view of a crusher according to an embodiment of the utility model.

In the drawing the view of the figure,

1. a rotating shaft; 11. a first pulley; 12. a second pulley; 2. a main motor; 21. a starting device; 3. an auxiliary motor; 31. a control switch; 41. a first rotational speed sensor; 42. a second rotation speed sensor; 5. a case; 6. a frame.

Detailed Description

The multi-motor driving system and the crusher provided by the utility model are explained and illustrated in detail below with reference to the accompanying drawings.

According to the multi-motor driving system provided by the utility model, the main motor and the auxiliary motor are started sequentially, and only the main motor needs to be started through the starting device, so that a water resistance starting cabinet or a solid soft starting cabinet with lower cost can be used as the starting device for starting and controlling the main motor. The main motor drives the rotating shaft to rotate after being started, the rotating shaft drives the rotor shaft of the auxiliary motor to rotate, and the auxiliary motor is electrified to finish the starting after the rotating speed of the rotor shaft reaches the power frequency rotating speed (namely the rotating speed in normal working), so that the generation of impact current caused by the starting of the auxiliary motor can be avoided, and the stability of each motor and power supply is ensured. In addition, the rotating speed of the auxiliary motor is the same as that of the rotating shaft and the main motor when the auxiliary motor is started, a device for controlling the synchronization of the rotating speed of the motor is not needed, and the integral structure of the system is simplified, so that the control is simpler and more reliable. The utility model is described in detail below in connection with specific embodiments:

in one embodiment, as shown in fig. 1, the present utility model provides a multi-motor driving system, which comprises a rotating shaft 1, a main motor 2 and an auxiliary motor 3, wherein the main motor 2 and the auxiliary motor 3 are both in driving connection with the rotating shaft 1, alternatively, the main motor 2 is a winding motor or a squirrel cage motor, the auxiliary motor 3 is a squirrel cage motor, and the main motor 2 and the auxiliary motor 3 jointly drive the rotating shaft 1 to rotate. The multi-motor driving system further comprises a starting device 21, wherein the starting device 21 is connected with the main motor 2 and used for controlling the starting of the main motor 2; and a control switch 31 connected with the auxiliary motor 3, the control switch 31 being used for controlling the start and stop of the auxiliary motor 3. The motor also comprises a rotating speed detection device and a controller, wherein the rotating speed detection device is used for detecting the rotating speeds of the rotating shaft 1 and the rotor shaft of the auxiliary motor 3; the controller is connected with the rotation speed detecting device, and controls the opening and closing of the control switch 31 according to the detection result of the rotation speed detecting device, for example, when the rotation speed detecting device detects that the rotation speed of the rotation shaft 1 and the rotation speed of the rotor shaft of the auxiliary motor 3 reach the power frequency rotation speed of the auxiliary motor 3, the controller controls the control switch 31 to be opened, namely, power is supplied to the stator of the auxiliary motor 3, so that the auxiliary motor 3 operates at the power frequency rotation speed.

Because the rotor shaft rotating speed of the auxiliary motor 3 reaches the power frequency rotating speed when the auxiliary motor is started, the starting can be completed without directly supplying power to the stator through the starting device, and because the power frequency rotating speed is reached when the auxiliary motor 3 is started, the synchronous requirement can be met without synchronously controlling the rotating speeds of the main motor 2 and the auxiliary motor 3.

In this embodiment, the starting device 21 is a water resistance starting cabinet or a solid state soft starting cabinet, for example, the starting device 21 is a water resistance starting cabinet, and the water resistance starting cabinet is connected to the main motor 2 for controlling the starting of the main motor 2. Alternatively, the main motor 2 is a wound motor or a squirrel cage motor, and the starting time is determined according to the load power.

The control switch 31 is a power switch, and is used for controlling the on-off of the power supply of the auxiliary motor 3, when the power switch is turned off, the stator of the auxiliary motor 3 is powered off, and when the power switch is turned on, the stator of the auxiliary motor 3 is powered on, and the auxiliary motor 3 can be started.

The rotation speed detection means includes a first rotation speed sensor 41 for detecting the rotation speed of the rotation shaft 1 and a second rotation speed sensor 42 for detecting the rotation speed of the rotor shaft of the auxiliary motor 3. The controller comprises a singlechip and the like, can acquire detection data of the first rotating speed sensor 41 and the second rotating speed sensor 42, and can control the control switch 31 to be closed when the rotating speeds detected by the first rotating speed sensor 41 and the second rotating speed sensor 42 reach the power frequency rotating speed of the auxiliary motor 3, and supply power to the stator of the auxiliary motor 3 to start the auxiliary motor 3. Judging whether to start the auxiliary motor 3 according to the rotation speed of the rotor shaft of the auxiliary motor 3 and the rotation speed of the rotating shaft 1 can play a role in protecting the auxiliary motor 3, can avoid the influence of the unsynchronized rotation speed on the auxiliary motor 3, and can also ensure that the power frequency rotation speed is reached when the auxiliary motor 3 is started, thereby reducing the impact current to the power grid.

Optionally, a first belt pulley 11 and a second belt pulley 12 are respectively arranged at two ends of the rotating shaft 1, a belt pulley is arranged on a rotor shaft of the main motor 2 and connected with the first belt pulley 11 through a belt, and a belt pulley is arranged on a rotor shaft of the auxiliary motor 3 and connected with the second belt pulley 12 through a belt. The main motor 2 and the auxiliary motor 3 are in transmission connection with the rotating shaft 1 through the belt, so that the main motor 2 and the auxiliary motor 3 can be protected to a certain extent, and when the belt cannot guarantee that the auxiliary motor 3 and the rotating shaft 1 synchronously rotate and cannot reach the starting condition of the auxiliary motor 3 due to the factors such as installation or damage, the auxiliary motor 3 cannot be started.

Further, when the main motor 2 and the auxiliary motor 3 are simultaneously operated, the first rotation speed sensor 41 and the second rotation speed sensor 42 continuously perform rotation speed detection, and when detection data transmitted by the first rotation speed sensor 41 and the second rotation speed sensor 42 are different, the controller controls the control switch 31 to be turned off, so that damage caused by long-time asynchronous operation of the main motor 2 and the auxiliary motor 3 can be avoided.

Alternatively, in other embodiments, as shown in fig. 2, a plurality of auxiliary motors 3 are provided, and a plurality of auxiliary motors 3 are all in driving connection with the rotating shaft 1, and a plurality of second pulleys 12 may be axially provided on the rotating shaft 1, and the provision of a plurality of auxiliary motors 3 may further increase the torque provided to the rotating shaft 1. Further, each auxiliary motor 3 is correspondingly provided with a control switch 31 connected with the auxiliary motor, and each auxiliary motor 3 is provided with a second rotation speed sensor 42, each auxiliary motor 3 can be independently controlled to start and stop, each auxiliary motor 3 can be ensured to start at a power frequency rotation speed, and accordingly synchronous rotation speeds of the main motor 2 and the auxiliary motors 3 are ensured.

The starting steps of the multi-motor driving system are as follows:

the main motor 2 is started by the starting device 21, the starting time is determined according to the load power, and when the first rotating speed sensor 41 and the second rotating speed sensor 42 detect that the rotating speeds of the rotating shaft 1 and the rotor shaft of the auxiliary motor 3 reach the power frequency rotating speed, the controller controls the control switch 31 to be closed to supply power to the stator of the auxiliary motor 3, and the auxiliary motor 3 is started directly at the power frequency rotating speed.

The utility model also provides a crusher, as shown in fig. 3, comprising the multi-motor starting system, and further comprising a frame 6, wherein a box body 5 is arranged on the frame 6, the box body 5 is provided with a main shaft, and the main shaft forms a rotating shaft 1 in the multi-motor starting system.

The main motor 2 and the auxiliary motor 3 are arranged on two sides of the box body 5 and are arranged on the frame 6, a first end of the main shaft is provided with a first belt pulley 11, the main motor 2 is connected with the first belt pulley 11 through a belt, a second end of the main shaft is provided with a second belt pulley 12, and the auxiliary motor 3 is connected with the second belt pulley 12 through a belt.

According to the utility model, the main shaft of the crusher is driven by the multi-motor transmission system, so that the torque of the main shaft can be improved, and the crushing capacity of the crusher is improved. The multi-motor driving system controls the starting of the multiple motors, so that the structure and control of the whole driving system can be simplified, the synchronous rotation speeds of the multiple motors can be effectively ensured, larger impact current generated when the motors are started can be avoided, and the stability of the driving system is improved.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to the terms "present embodiment," "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any at least one embodiment or example. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

The above embodiments are only preferred embodiments of the present utility model, and are not intended to limit the present utility model, but any modifications, equivalents, and simple improvements made within the spirit of the present utility model should be included in the scope of the present utility model.

Claims (9)

1. A multi-motor drive system, comprising:

a rotating shaft;

the main motor is in driving connection with the rotating shaft;

the starting device is connected with the main motor and used for controlling the starting of the main motor;

the auxiliary motor is in driving connection with the rotating shaft;

the control switch is connected with the auxiliary motor and used for controlling the start and stop of the auxiliary motor;

a rotation speed detecting device for detecting rotation speeds of the rotation shaft and a rotor shaft of the auxiliary motor;

and the controller is connected with the rotating speed detection device and controls the opening and closing of the control switch according to the detection result of the rotating speed detection device.

2. A multi-motor drive system as claimed in claim 1, wherein the starting means is a water resistance starting cabinet or a solid state soft start cabinet.

3. The multi-motor drive system of claim 2, wherein the control switch is a power switch for controlling power on and off of the auxiliary motor.

4. A multi-motor drive system according to claim 2, wherein the rotation speed detecting means includes a first rotation speed sensor for detecting a rotation speed of the rotation shaft and a second rotation speed sensor for detecting a rotation speed of a rotor shaft of the auxiliary motor.

5. The multi-motor driving system according to claim 4, wherein a first belt pulley and a second belt pulley are provided at both ends of the rotation shaft, respectively, a rotor shaft of the main motor is connected with the first belt pulley by a belt, and a rotor shaft of the auxiliary motor is connected with the second belt pulley by a belt.

6. A multi-motor drive system according to claim 5, wherein the main motor is a wound motor or a squirrel cage motor,

the auxiliary motor is a squirrel cage motor.

7. The multi-motor drive system of claim 5, wherein a plurality of said auxiliary motors are provided, a plurality of said auxiliary motors are each drivingly connected to said rotary shaft,

each auxiliary motor is correspondingly provided with a control switch connected with the auxiliary motor, and each auxiliary motor is provided with a second rotating speed sensor.

8. A crusher comprising the multi-motor drive system of claim 6 or 7,

the rotating shaft forms a main shaft of the crusher.

9. The crusher of claim 8, wherein the crusher comprises a frame and a housing, the main shaft is rotatably disposed on the housing, the housing is disposed on the frame,

the main motor and the auxiliary motor are arranged on two sides of the box body and mounted on the frame, the first end of the main shaft is provided with the first belt pulley, the main motor is connected with the first belt pulley through a belt, the second end of the main shaft is provided with the second belt pulley, and the auxiliary motor is connected with the second belt pulley through a belt.