WO2017198064A1

WO2017198064A1 - Exciting force adjustment device

Info

Publication number: WO2017198064A1
Application number: PCT/CN2017/082544
Authority: WO
Inventors: 陆志猛; 王青松; 孙涛; 曾庆林; 温常琰; 杨志雄; 张俊; 陆岩
Original assignee: 湖北航鹏化学动力科技有限责任公司; 北京航天创新专利投资中心（有限合伙）
Priority date: 2016-05-16
Filing date: 2017-04-28
Publication date: 2017-11-23
Also published as: CN106000850A; CN106000850B

Abstract

An exciting force adjustment device comprises two fixed clamping plates (1) and at least one adjustment unit disposed between the two fixed clamping plates (1). Each adjustment unit comprises four servomotors (2) arranged in sequence. Each servomotor (2) comprises: a motor housing (22); a rotating shaft (25); a first bearing (21) and a second bearing (27) disposed at the two ends of the rotating shaft (25); a rotor (24); a stator coil (23); and an encoder (28). The rotor (24) is disposed on the rotating shaft (25) between the first bearing (21) and the second bearing (27). An eccentric block (26) is disposed on the rotating shaft (25) between the rotor (24) and the second bearing (27). The four servomotors (2) are divided into two groups. Ends where the eccentric blocks (26) of the two servomotors (2) in the same group are located are connected onto the same fixed clamping plate (1). The rotational directions of the two servomotors (2) in the same group are opposite. Ends where the eccentric blocks (26) of the servomotors (2) in the different groups are located are connected to the different fixed clamping plates (1). The rotational speeds of the four servomotors (2) are the same. In the adjustment unit, servomotors located on two sides cannot form one group with adjacent servomotors.

Description

Excitation force adjusting device

Technical field

The present application relates to a force transmission device, and in particular to an excitation force adjustment device.

Background technique

With the increasing use of vibration equipment, the requirements for mechanical vibration excitation devices are becoming higher and higher, especially on-line real-time adjustment of excitation force and excitation frequency. At present, the most used vibration motor, if you want to adjust the excitation force, you need to adjust the speed of the motor, and the excitation frequency will also change; if the excitation frequency remains the same, you need to adjust the quality or eccentricity of the eccentric block after stopping. Distance, the magnitude of the exciting force cannot be adjusted online in real time.

Summary of the invention

The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and to provide an excitation force adjusting device capable of adjusting the magnitude of the exciting force in real time without stopping the machine, and satisfying the online real-time control of the vibration device.

In order to solve the above technical problem, the present invention provides an excitation force adjusting device, which includes: four servo motors fixed in parallel with an eccentric block;

Two of the four servo motors are an adjustment group, and the rotation axes of the two servo motors of each adjustment group rotate in opposite directions;

The four servo motors have the same rotational speed.

Preferably, the parallel fixing is to fix four servo motors between the two fixing plates 1 .

Preferably, the four servo motors comprise a first servo motor (2a), a second servo motor (2b), a third servo motor (2c) and a fourth servo motor (2d) arranged in sequence;

The first servo motor 2a and the fourth servo motor 2d of the four servo motors are an adjustment group, and the second servo motor 2b and the third servo motor 3c are an adjustment group; or

The first servo motor 2a and the third servo motor 2c of the four servo motors are one adjustment Group, the second servo motor 2b and the fourth servo motor 2d are another adjustment group;

The two servo motors in each adjustment group are placed in the same direction in the head and tail; the servo motors in the different adjustment groups are placed in the opposite direction.

Preferably, the servo motor comprises: a rotating shaft 25 disposed in the motor casing 22, a rotor 24, a stator coil 23 and an eccentric block 26;

The rotating shaft 25 is fixed in the motor casing 22 in a radially rotatable manner;

The stator coil 23 is fixed on an inner wall of the motor casing 22;

The rotor 24 is disposed on the rotating shaft 25 and corresponds to the position of the stator coil 23;

The eccentric block 26 is disposed on the rotating shaft 25.

Preferably, the rotating shaft 25 is provided with a protrusion for limiting the eccentric block 26;

The eccentric block 26 is fixed to the rotating shaft 25 by means of a key connection;

The rotating shaft 25 is further provided with a limiting ring for positioning the eccentric block 26 with the protrusion.

Preferably, the motor housing 22 includes a front housing, an intermediate housing and a rear housing that are sequentially fixed;

a cavity for accommodating the eccentric block 26 is disposed in the front housing;

The intermediate housing is provided with a cavity for accommodating the stator coil 23 and the rotor 24, and the stator coil 23 is fixed to an inner wall of the intermediate casing.

Preferably, the front housing and the rear housing are respectively provided with bearing chambers;

a first bearing 27 and a second bearing 21 for providing rotational support for the rotating shaft 25 are respectively disposed in the bearing cavity of the front housing and the bearing cavity of the rear housing;

The eccentric block is disposed between the first bearing 27 and the second bearing 21.

Preferably, the servo motor further includes an encoder 28 disposed at an end of the rotating shaft 25 to extend out of the motor casing 22.

DRAWINGS

Specific embodiments of the present application will be described below with reference to the accompanying drawings, in which:

1 is a schematic view showing an excitation force adjusting device in Embodiment 1 of the present application;

Figure 2 shows a cross-sectional view of the servo motor of the present application;

3 is a view showing an arrangement operation of four servo motors in the first embodiment of the present application;

4 is a schematic structural diagram of a device invoking device in Embodiment 3 of the present application;

FIG. 5 is a vector diagram showing the exciting force generated by the four eccentric blocks in the first embodiment of the present application;

6 is a schematic view showing an excitation force adjusting device in Embodiment 2 of the present application;

Fig. 7 is a view showing the arrangement and operation of four servo motors in the second embodiment of the present application.

In the figure, 1, fixed splint, 2, servo motor, 21, bearing one, 22, motor housing, 23, stator coil, 24, rotor, 25, shaft, 26, eccentric block, 27, bearing two, 28, encoder .

detailed description

The exemplary embodiments of the present application are further described in detail below with reference to the accompanying drawings, in which the embodiments described are only a part of the embodiments of the present application, but not all embodiments. An exhaustive example. And in the case of no conflict, the features in the embodiments and the embodiments in the description can be combined with each other.

1, 2, 3, the present invention comprises two fixing splints 1, and one or more adjusting units disposed between the two fixing splints 1; each adjusting unit comprises four servo motors arranged in sequence; Each servo motor includes a motor casing 22, a rotating shaft 25, a bearing 21 and a bearing 27 disposed at both ends of the rotating shaft 25, a rotor 24, a stator coil 23, and an encoder 28; the rotor 24 is disposed between the bearing 21 and the bearing 27 On the rotating shaft 25, an eccentric block 26 is disposed on the rotating shaft 25 between the rotor 24 and the bearing 27. The rotating shafts 25 of the servo motors are parallel to each other, and the eccentric block is located between the two bearings of the servo motor, and the force is better, the structure is more compact and compact.

The four servo motors 2 are divided into two groups, the first servo motor 2a and the fourth servo motor 2d are a group, the second servo motor 2b and the third servo motor 2c are a group, and the four servo motors are synchronously controlled, and their The rotation speed is the same, and the two servo motors in the same group rotate in opposite directions. For example, the rotation direction of the first servo motor 2a is counterclockwise, and the rotation direction of the fourth servo motor 2d is clockwise.

In Fig. 4, F2a, F2b, F2c, and F2d are servo motors F2a, F2b, F2c, and F2d, respectively. The vector of the exciting force generated by the heart block, F is the vector sum of the four component forces. During the operation of the servo motor, when the excitation frequency remains unchanged, according to the feedback of the encoder 28 in each servo motor, by adjusting the angular difference between the rotation angles of the two sets of servo motors, the exciting force is 0 to F and max. Online real-time adjustment between.

Working process: The four servo motors are synchronously controlled by the servo controller. Their rotation speeds are the same, and the two servo motors in the same group rotate in opposite directions. Keeping the servo motor speed unchanged, according to the feedback of the encoder 28 in each servo motor, the first servo motor 2a and the fourth servo motor 2d are adjusted as a set of rotation angles β with the second servo motor 2b and the third servo motor 2c. For the angular difference of a set of rotation angle ε, the online real-time adjustment of the magnitude of the excitation force is realized. As shown in Fig. 4, at the same rotational speed, when the rotational angle β is equal to the rotational angle ε, the excitation force of the excitation device is the largest, and the angular difference between the rotational angle β and the rotational angle ε is 180°, the excitation device The exciting force is zero. The lateral exciting forces generated by the eccentric mass of the same set of servo motors cancel each other out, and the lateral exciting force of the excitation device is zero, and only the exciting force in the vertical direction is generated.

In FIGS. 5 and 6, the first servo motor 2a and the third servo motor 2c are one set, and the second servo motor 2b and the fourth servo motor 2d are one set.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of a full device embodiment, an entirely software embodiment, or an embodiment in combination with software and device. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.

Claims

An excitation force adjusting device, comprising: four servo motors fixed in parallel with an eccentric block;

Two of the four servo motors are an adjustment group, and the rotation axes of the two servo motors of each adjustment group rotate in opposite directions;

The four servo motors have the same rotational speed.
The exciting force adjusting device according to claim 1, wherein said parallel fixing is to fix four servo motors between the two fixing plates (1).
The exciting force adjusting device according to claim 1, wherein

The four servo motors include a first servo motor (2a), a second servo motor (2b), a third servo motor (2c) and a fourth servo motor (2d);

The first servo motor (2a) and the fourth servo motor (2d) of the four servo motors are an adjustment group, and the second servo motor (2b) and the third servo motor (2c) are an adjustment group; or,

The first servo motor (2a) and the third servo motor (2c) of the four servo motors are one adjustment group, and the second servo motor (2b) and the fourth servo motor (2d) are another adjustment group;

The two servo motors in each adjustment group are placed in the same direction in the head and tail; the servo motors in the different adjustment groups are placed in the opposite direction.
The excitation force adjusting device according to claim 1, wherein said servo motor comprises: a rotating shaft (25), a rotor (24), a stator coil (23), and an eccentric block disposed in a motor casing (22). (26);

The rotating shaft (25) is fixed in the motor casing (22) in a radially rotatable manner;

The stator coil (23) is fixed on an inner wall of the motor casing (22);

The rotor (24) is disposed on the rotating shaft (25) and is located at the position of the stator coil (23) Corresponding;

The eccentric block (26) is disposed on the rotating shaft (25).
The excitation force adjusting device according to claim 1, wherein the rotating shaft (25) is provided with a protrusion for limiting the eccentric block (26);

The eccentric block (26) is fixed to the rotating shaft (25) by means of a key connection;

The rotating shaft (25) is further provided with a limiting ring for positioning the eccentric block (26) with the protrusion.
The excitation force adjusting device according to claim 4, wherein the motor casing (22) comprises a front casing, an intermediate casing and a rear casing which are sequentially fixed;

a cavity for accommodating the eccentric block (26) is disposed in the front housing;

The intermediate housing is provided with a cavity for accommodating the stator coil (23) and the rotor (24), and the stator coil (23) is fixed to an inner wall of the intermediate casing.
The excitation force adjusting device according to claim 6, wherein the front housing and the rear housing are respectively provided with bearing chambers;

a first bearing (27) and a second bearing (21) for providing rotational support for the rotating shaft (25) are respectively disposed in the bearing cavity of the front housing and the bearing cavity of the rear housing;

The eccentric block is disposed between the first bearing (27) and the second bearing (21).
The excitation force adjusting device according to claim 6, wherein said servo motor further comprises: an encoder (28) disposed at an end of said rotating shaft (25) for projecting said motor casing (22).