阅读说明：本技术 电机抱闸检测装置 (Motor band-type brake detection device ) 是由 付世强 于 2021-06-04 设计创作，主要内容包括：本发明公开了一种电机抱闸检测装置,包括制动盘和抱闸装置动块,所述抱闸装置动块沿电机轴向移动时与制动盘压住以使电机制动；被感应装置,设置在所述制动盘上并与电机转子同轴旋转；感应装置,设置在所述抱闸装置动块上随抱闸装置动块轴向移动；信号模块,接受感应装置输出的感应电压信号,并输出被感应装置相对于感应装置的轴向位移信号。本发明结构实用简洁、成本优势明显,能有效地测量电机转速及抱闸动作,确保电机具有可靠的起动、加减速、制动性能及便利的寿命维护保养,可广泛应用于当前各种电机中。(The invention discloses a motor brake detection device which comprises a brake disc and a brake device moving block, wherein the brake device moving block is pressed against the brake disc when moving along the axial direction of a motor so as to brake the motor; the induced device is arranged on the brake disc and rotates coaxially with the motor rotor; the induction device is arranged on the moving block of the band-type brake device and moves along with the moving block of the band-type brake device in the axial direction; and the signal module receives the induced voltage signal output by the induction device and outputs an axial displacement signal of the induced device relative to the induction device. The invention has the advantages of practical and simple structure and obvious cost advantage, can effectively measure the rotating speed and the brake action of the motor, ensures that the motor has reliable starting, acceleration and deceleration, braking performance and convenient service life maintenance, and can be widely applied to various current motors.)

1. The utility model provides a motor band-type brake detection device which characterized in that includes:

the motor brake device comprises a brake disc and a brake device moving block, and the brake device moving block is pressed against the brake disc when moving along the axial direction of the motor so as to brake the motor;

the induced device is arranged on the brake disc and rotates coaxially with the motor rotor;

the induction device is arranged on the moving block of the band-type brake device and moves along with the moving block of the band-type brake device in the axial direction;

and the signal module receives the induced voltage signal output by the induction device and outputs an axial displacement signal of the induced device relative to the induction device.

2. The motor brake detection device according to claim 1,

the induction device comprises a coil group, an induction head, a bearing body and a wiring part; each coil group comprises a plurality of coil cores which are distributed on the inner peripheral surface of the carrier at intervals and coils which are wound on the coil cores, and the wiring part is arranged on the carrier and connected with the coils; each induction head is arranged around to form an inner space; the coils on all the coil groups comprise exciting coils and induction coils;

the device to be induced is accommodated in the inner space, and the outer surface of the device to be induced is provided with a periodically distributed arc-shaped concave-convex arrangement;

the device to be sensed can move relative to the sensing device, so that the gap between the inner end face of the sensing head of the sensing device and the outer surface of the device to be sensed can be changed.

3. The motor brake detection device according to claim 2, wherein the signal module comprises:

the excitation circuit is used for providing an excitation signal of an excitation coil in the induction device;

the decoding circuit is used for receiving the induction voltage signal output by the induction device, decoding the induction voltage signal, outputting the decoded induction voltage signal as a speed signal of the rotor, and transmitting the speed signal to the motor system;

and the processing circuit is used for receiving the induced voltage signal output by the induction device, and outputting an axial displacement signal of the induced device relative to the induction device after data operation.

4. The motor brake detection device according to claim 1, wherein the motor brake device further comprises:

and the band-type brake device fixed block is used for resetting the band-type brake device movable block.

5. The motor brake detection device according to claim 2,

the inner end surface of each induction head is an inclined surface along the axial direction of the motor, and the inner surface of the inner space is conical; or the inner end surface of each induction head is a plane along the axial direction of the motor, and the inner surface of the inner space is cylindrical.

6. The motor brake detection device according to claim 2, wherein the outer surface of the sensed device is cylindrical or conical.

7. The motor brake detection device according to claim 2, wherein the outer surface of the sensed device is parallel to the inner surface of the sensing head after being assembled.

8. The motor brake detection device according to claim 2, wherein the coil groups are at least 6 groups.

9. The motor brake detection device according to claim 2, wherein at least one excitation coil and 2 induction coils are provided on all the coil groups.

10. The motor brake detection device according to claim 2, wherein the outer surface of the sensed device has periodically distributed arc-shaped convexo-concave shapes, and the arc-shaped convexo-concave shapes are cross-shaped, quincunx-shaped, oval-shaped or triangular with arc-shaped corners.

Technical Field

The invention relates to the field of electromechanics, in particular to a motor internal contracting brake detection device.

Background

The band-type brake detection device is an electromechanical device which is used for detecting whether a band-type brake is opened or not in the middle of the operation of a motor to prevent the occurrence of brake-off operation, and preventing the elevator from moving again when an elevator car is static and a traction machine is in a power-off state if the elevator car is in the elevator.

The existing band-type brake detection device usually uses a mechanical switch to detect the state of the band-type brake, as described in CN101619750A and CN104891379A, but the mechanical switch has low precision, relatively poor reliability and high false fault alarm rate. Meanwhile, the risk of function loss after sports fatigue exists, so that the motor drags the brake to operate, and the motor is burnt.

At present, the problems are prevented, only regular inspection and maintenance can be carried out by maintenance personnel, the technical quality requirement on professional personnel is high, and the maintenance cost is invisibly increased.

Disclosure of Invention

The invention aims to solve the technical problem of providing a motor brake detection device which can simultaneously measure the motion and/or position information and the brake state of a motor rotor, has simple structure, convenient installation, long service life and high integration level, and can reliably warn the maintenance or service life termination of a motor.

In order to solve the technical problem, the invention discloses a motor brake detection device, which comprises: the motor brake device comprises a brake disc and a brake device moving block, and the brake device moving block is pressed against the brake disc when moving along the axial direction of the motor so as to brake the motor; the induced device is arranged on the brake disc and rotates coaxially with the motor rotor; the induction device is arranged on the moving block of the band-type brake device and moves along with the moving block of the band-type brake device in the axial direction; and the signal module receives the induced voltage signal output by the induction device and outputs an axial displacement signal of the induced device relative to the induction device.

Preferably, the induction device comprises a coil group, an induction head, a carrier and a wiring part; each coil group comprises a plurality of coil cores which are distributed on the inner peripheral surface of the carrier at intervals and coils which are wound on the coil cores, and the wiring part is arranged on the carrier and connected with the coils; each induction head is arranged around to form an inner space; the coils on all the coil groups comprise exciting coils and induction coils; the device to be induced is accommodated in the inner space, and the outer surface of the device to be induced is provided with a periodically distributed arc-shaped concave-convex arrangement; the device to be sensed can move relative to the sensing device, so that the gap between the inner end face of the sensing head of the sensing device and the outer surface of the device to be sensed can be changed.

Preferably, the signal module includes: the excitation circuit is used for providing an excitation signal of an excitation coil in the induction device; the decoding circuit is used for receiving the induction voltage signal output by the induction device, decoding the induction voltage signal, outputting the decoded induction voltage signal as a speed signal of the rotor, and transmitting the speed signal to the motor system; and the processing circuit is used for receiving the induced voltage signal output by the induction device, and outputting an axial displacement signal of the induced device relative to the induction device after data operation.

Preferably, the motor band-type brake device further comprises: and the band-type brake device fixed block is used for resetting the band-type brake device movable block.

Preferably, the inner end surface of each induction head is an inclined surface along the axial direction of the motor, and the inner surface of the inner space is conical; or the inner end surface of each induction head is a plane along the axial direction of the motor, and the inner surface of the inner space is cylindrical.

Preferably, the outer surface of the sensed device is cylindrical or conical.

Preferably, the outer surface of the sensed device is parallel to the inner surface of the sensing head after assembly.

Preferably, the coil sets are at least 6 sets.

Preferably, at least one excitation coil and 2 induction coils are arranged on all coil groups.

Preferably, the outer surface of the sensed device is provided with periodically distributed arc-shaped concave-convex type arrangement in a cross shape, a quincunx shape, an oval shape or a triangle with an arc-shaped angle.

The invention solves the problems of lower precision, relatively poorer reliability and high false fault alarm rate of the mechanical detection switch. The detection device provided by the invention has the advantages of simple structure, convenience in installation, high stability, long service life, high integration level, easiness in early-stage installation and later-stage maintenance, cost saving and the like, and can be widely applied to various motors.

Drawings

Fig. 1 is a schematic diagram of a motor brake detection device according to a preferred embodiment of the present invention.

Fig. 2 is a schematic view of an induction device in the motor band-type brake detection device according to the present invention.

Fig. 3a to 3d are schematic diagrams of an induced device in the motor band-type brake detection device according to the present invention.

Fig. 4 is a schematic diagram of a signal module of the motor brake detection device according to the present invention.

Fig. 5 is an output waveform diagram of the output voltage amplitude and the air gap of the motor brake detection device of the present invention.

Fig. 6 is a schematic signal diagram of the motor brake detection device of the present invention.

Fig. 7 is a schematic diagram of another preferred embodiment of the motor band-type brake detection device according to the present invention.

Description of reference numerals:

1 induction device 11 coil

12 induction head 13 bearing body

14 device to be sensed of wiring part 2

22 arc-shaped concave-convex type 23 induction sheet

3 signal module 31 excitation circuit

32 decoding circuit 33 processing circuit

41 motor shaft 42 motor stator

43 brake disc 44 band-type brake device fixed block

45 contracting brake device movable block 48 induction gap

Detailed Description

The invention is further illustrated by the following specific figures and examples.

As shown in fig. 1 and 4, the motor brake detection device of the present invention includes a motor shaft 41, a motor stator 42, a brake disc 43, a brake device stator 44, a brake device rotor 45, an induction device 1, an induced device 2 and an induction air gap 48, wherein the induction device 1 is mounted on the brake device rotor 45, the induced device 2 is mounted on the brake disc 43 and rotates coaxially with the motor shaft 41, the induction device 1 and the induced device 2 are mounted coaxially, the induced device 2 is located in an inner space 15 of the induction device 1, and a gap exists between the induction device 1 and the induced device 2. The motor band-type brake detection device also comprises a signal module 3 which is used for providing an excitation signal, receiving an induction voltage signal output by the induction device 1, decoding the induction voltage signal, processing the signal into a speed signal, processing the speed signal by a processing circuit and outputting a displacement signal of the induction device.

The sensing device 1 and the sensed device 2 are further illustrated in fig. 2 and 3 a-3 d.

As shown in fig. 2, the induction device 1 includes a coil 11, an induction head 12, a carrier 13, and a wiring portion 14; the bearing body 13 is annular and provided with an installation gap, and can be conveniently fixed on a movable block shaft of a band-type brake device of the motor without the aid of a bracket; a plurality of coil cores are uniformly distributed on the inner circumferential surface of the carrier 13 at intervals, the coil 11 is arranged on the coil cores, and the inner side of the coil 11 is an induction head 12 extending out of or connected with the coil cores. The induction head 12 is used to enhance the electromagnetic induction phenomenon, and preferably, the coil core and the induction head 12 are made of silicon steel. The inner end surface 12a of the induction head 12 is an inclined surface, and is mainly adapted to an inclined surface in the inner space of the device to be induced 2, so that the induction coil can better generate an induction voltage signal, and when the induction device moves along with the moving block of the band-type brake detection device, an air gap with different distances is generated between the induction device and the device to be induced; the wiring portion 14 is provided on the carrier 13 and connects the coils 11; the wiring portion 14 may be a terminal, or may be a wire harness connecting coils.

The number of the coils 11 is at least 6, or 10, 12 or 15, the coils 11 are divided into at least one excitation coil and at least one induction coil; the plurality of induction coils may be divided into 2 groups or more.

As shown in fig. 3 a-3 d, the sensed device 2 includes an inner space for installation and fixation, and the inner surface of the inner space is an inclined surface, and the outer surface of the sensed device 2 has arc-shaped concave-convex arrangements 22 distributed periodically; the periodically distributed arcuate relief-type arrangement 22 may be in the form of a cross as shown in fig. 3a, or in the form of an ellipse, a triangle-like, a quincunx as shown in fig. 3b, 3c, 3d, respectively; wherein the quincunx can be five-petal, six-petal … … and quincunx larger than six-petal; the sensed device 2 is formed by integrally molding a metal or a multi-metal mixture or a metal and a non-metal mixture, or by laminating a plurality of sensing sheets 23, for example, silicon steel sheets; the arcuate dimple arrangements 22 on the sensed device 2 should be continuously and periodically distributed over the outer surface of the sensed device.

As shown in fig. 4, the signal module 3 includes an excitation circuit 31, a decoding circuit 32, and a processing circuit 33; the excitation circuit 31 can provide an excitation signal of the excitation coil in the induction device 1, the decoding circuit 32 receives an induced voltage signal output by the induction device 1, decodes the signal and outputs the signal as a speed signal of the rotor to be transmitted to the motor system, and the processing circuit 33 receives the induced voltage signal output by the induction device 1, and outputs an axial displacement signal of the induction device relative to the induction device through data operation.

The following further describes how the device can realize the measurement of the axial displacement of the motor.

Fig. 5 shows an output waveform diagram of the amplitude of the output voltage of the induction device and the air gap after the motor for measurement is assembled with the device, when the induction device rotates, the relative magnetic permeability of the inclined surfaces of the concave parts and the inclined surfaces of the convex parts of the arc-shaped concave-convex arrangement 22 periodically distributed on the outer peripheral surface of the induction device 2 and the inclined surfaces of the induction heads 12 periodically distributed on the induction device 1 changes, so that the induction voltage output by the induction device 1 also changes, and the generated induction voltage changes periodically relatively along with the difference of the arc-shaped concave-convex arrangement 22 periodically distributed on the peripheral direction of the induction device 2.

After the device is installed, when the motor rotates, the band-type brake device is in an open state, the assembly gap between the sensing device and the sensed device is unchanged, the maximum amplitude of the output voltage signal is also constant, only when the band-type brake device is closed, the sensing device 1 can move along with the moving block of the band-type brake device and tightly hold the motor shaft, the braking effect is generated, at the moment, the air gap between the sensing device 1 and the sensed device 2 can be changed, the induction permeability can be changed along with the air gap, and therefore the maximum amplitude value of the output voltage signal is changed.

The maximum value of the amplitude of the voltage signal output by the induction device when the motor rotor rotates is monitored in real time through voltage acquisition of the processing circuit 33, and whether the band-type brake device is in an open state or a closed state is judged through a threshold comparator in the processing circuit 33.

More preferably, the voltage signal output by the sensing device 1 is subjected to AD acquisition and converted into displacement data, such as forward displacement and reverse displacement, by the processing circuit 33, and the displacement data is transmitted to the control system, so that the wear degree of the band-type brake can be detected at any time and used for fault early warning or maintenance monitoring.

When the band-type brake device of the motor is opened, the induction gap 48 is positioned at the maximum position, the relative permeability of the induction head 12 is also at the minimum at the moment, the excitation coil provides excitation voltage by the signal module 3, and the induction coil of the induction device 1 is used for inducing an induction voltage signal generated due to the change of the relative permeability of the gap when the induction device 2 rotates around the induction device 1; the signal module 3 decodes the induction voltage signal collected by the induction device 1 and calculates the displacement of the brake moving block, and outputs the processed rotating speed signal in an analog mode, and the displacement signal is communicated with digital signals, such as CAN, RS485, RS232 and the like.

As shown in FIG. 6, when the motor brake of the device is opened, the induction gap between the induction device and the device to be induced is about 0.5-0.6 mm, and the actual output induction voltage waveform of the induction device is shown by a dotted line.

The motor brake is closed, the induction gap between the induction device and the induced device is about 0.15-0.2 mm, and the actual output induction voltage oscillogram of the induction device is shown as a solid line.

The processing circuit 33 outputs the motor rotor displacement data by comparing the maximum values of the induced voltages, so that fault early warning or internet of things monitoring of the motor rotor displacement state is realized.

As shown in fig. 7, the device 2 to be sensed may be cylindrical, and the inner circumferential surface of the sensing device 1 may be tapered when it is assembled and used.

More schematically (not shown) the inner periphery of the induction device 1 is cylindrical and the outer periphery of the induced device 2 is tapered when assembled for use.

More schematically (not shown) the inner circumference of the sensing device 1 is cylindrical, and the outer circumference of the sensed device 2 is also cylindrical, so that the cross-over portion can change with the change of the sensing gap during assembly. The above-described functions can be achieved.

The invention has the advantages of practical and simple structure and obvious cost advantage, can effectively measure the rotating speed and the brake action of the motor, ensures that the motor has reliable starting, acceleration and deceleration, braking performance and convenient service life maintenance, and can be widely applied to various current motors.

The present invention has been described in detail with reference to the specific embodiments and examples, but these are not intended to limit the present invention. Many variations and modifications may be made by one of ordinary skill in the art without departing from the principles of the present invention, which should also be considered as within the scope of the present invention.