CN211508844U

CN211508844U - High-speed motor with rotor fault detection device

Info

Publication number: CN211508844U
Application number: CN201922174148.8U
Authority: CN
Inventors: 王家堡
Original assignee: Xiangtan Hualian Motor Co ltd
Current assignee: Xiangtan Hualian Motor Co ltd
Priority date: 2019-12-07
Filing date: 2019-12-07
Publication date: 2020-09-15
Anticipated expiration: 2029-12-07

Abstract

The utility model discloses a high-speed motor with rotor fault detection device, including front end housing (1) and rear end housing (11), frame (2), stator core (3), rotor support (4) include rotor core (41), pivot (42), front and back contact bearing (43) and fault monitoring device (44), fault monitoring device (44) comprises elastic element (441), transmission line (442) and controller (443), rotor core (41), front and back contact bearing (43) pressure equipment are on pivot (42), the elastic element (441) tip of fault monitoring device (44) is equipped with resistance strain gauge, resistance strain gauge is fixed in the recess of the bearing chamber of front end housing (1) or rear end housing (11), resistance strain gauge and controller realize electric connection through transmission line (442), and a filter, an amplifier and a converter are arranged in the controller. The utility model has the characteristics of with low costs, simple structure, convenient to use.

Description

High-speed motor with rotor fault detection device

Technical Field

The utility model belongs to the technical field of high-speed driving motor designs, specifically a take rotor fault detection device's high-speed electric machine.

Background

Generally, the motor is defined as a high-speed motor when the rotating speed is 10kr/min or the linear speed of the surface of a rotor is more than 100m/s, and mainly comprises a high-speed asynchronous motor, a high-speed brushless direct current motor, a high-speed permanent magnet synchronous motor and a high-speed reluctance motor. The high-speed motor has the advantages of high rotating speed, high efficiency and the like, is widely applied to a plurality of industrial fields, and is required to be driven by the high-speed motor in the fields of sewage treatment, natural gas transportation and the like, flywheel energy storage, turbocharging systems and the like; in the field of high-precision machining, the machining precision and the yield can be effectively improved by adopting the high-speed motorized spindle, and the market demand and the economic benefit are huge. In order to avoid the mechanical stress of the material of the rotor from being greater than the maximum value of the specified allowable stress, the rotor of the motor is usually designed to be slender to reduce the linear velocity of the outer surface of the rotor, or a sheath component is added on the outer surface of the rotor to improve the allowable stress, so that the stability and reliability are increased, but the high-speed motor occasionally has an overload or overspeed operation condition, so that the problems of excessive mechanical stress, excessive temperature rise, material failure and the like exist, the outer surface of the rotor rotating at high speed and the inner diameter of the stator are rubbed with each other, and the performance of the motor is deteriorated or burnt. Because the rotor that high speed operation is in the inside of motor, whether its damage, or the damage degree is difficult to observe from the motor outside, in addition, some damage because the damaged area is little, the surface is difficult to observe, consequently is difficult to perceive, can't judge that the rotor has had trouble hidden danger or has broken down. The rotor supporting system of the high-speed motor can stably, safely and reliably operate for a long time and can not be practically applied. The bearings widely adopted in various high-speed motors at present can be divided into two types, namely a contact type bearing and a non-contact type bearing, wherein the former is mainly a high-speed ball bearing, and the latter comprises an air bearing and a magnetic suspension bearing, wherein the contact type ball bearing is the most widely applied bearing type in the field of motors and has the advantages of strong robustness, low cost, small size and the like. At present, relevant documents and reports do not exist in online real-time detection of high-speed motor rotor faults, or the online real-time detection is still in a research stage.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve be that contact ball bearing supports high-speed operation rotor trouble problem, when high-speed motor operation, be difficult to the running state of real-time on-line observation high-speed rotor, if the rotor appears warping, wipe isostructure trouble mutually, and can not in time be discover to take measures, probably produce abominable incident. The utility model provides a take rotor fault detection device's high-speed electric machine carries out effectual, real-time monitoring to the rotor of high-speed operation, carries out effectual control when guaranteeing that the rotor structural failure appears, overcomes prior art's shortcoming and not enough.

The utility model adopts the following technical scheme:

the utility model provides a take rotor fault detection device's high-speed motor, includes front end housing and rear end cap, frame, stator core, rotor support, its characterized in that: the rotor support includes rotor core, pivot, front and back contact bearing and trouble monitoring device, trouble monitoring device comprises elastic element, transmission line and controller, rotor core, front and back contact bearing pressure equipment are in the pivot, trouble monitoring device's elastic element tip is equipped with the resistance foil gage, the resistance foil gage is fixed in the recess of the bearing room of front end housing or rear end cap, the resistance foil gage passes through the transmission line with the controller and realizes electric connection, still be equipped with filtering, amplifier in the controller, AD converter, the resistance foil gage is connected with filtering, amplifier, filtering, amplifier and AD converter are connected, microchip has inlayed in the AD converter.

Further, still be equipped with display, siren and processing module in the controller, processing module is the PLC module, processing module passes through the transmission line and is connected with elastic element's resistance foil gage, processing module's output is connected with display and siren respectively.

Still further, the filtering and amplifying device is a low-pass filter composed of an operational amplifier LF356, a resistor and a capacitor, and the A/D converter is embedded with a microchip composed of 8098 single chip microcomputer chips.

The utility model has the advantages that:

1. the utility model discloses a under the size of high-speed motor operating performance, outside installation and the structure of inside all do not change the prerequisite, increase the recess of a fixed elastic resistance foil gage in the bearing chamber of end cover, cooperate the fault monitoring that fault monitoring device can realize the motor.

2. The utility model discloses detecting signal and control system form closed-loop control, can realize the real-time online detection that does not shut down, carry out real-time test and feedback with this stress variation's signal according to resistance strain gauge, realize unmanned on duty state, guarantee safe, the reliable operation of its system.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view showing the state of the elastic element under stress and deformation when the motor of the present invention fails;

fig. 3 is a schematic structural view of the fault monitoring device of the present invention;

fig. 4 is a schematic diagram of the fault monitoring device of the present invention;

fig. 5 is the schematic view of the operation principle of the fault monitoring device of the present invention.

In the figure: 1-front end cover, 11-rear end cover, 2-base, 3-stator core, 4-rotor support, 41-rotor core, 42-rotating shaft, 43-front and rear contact type bearing, 44-fault monitoring device, 441-elastic element, 442-transmission line and 443-controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1-4, the utility model provides a take rotor fault detection device's high-speed motor, it includes: the motor comprises a front end cover 1, a rear end cover 11, a machine base 2, a stator core 3 and a rotor support 4, wherein the front end cover 1 and the rear end cover 11 are respectively installed at two ends of the machine base 2, the stator core 3 is fixedly installed at two ends of the machine base 2, the rotor support 4 comprises a rotor core 41, a rotating shaft 42, a front contact type bearing 43 and a rear contact type bearing 43, and a fault monitoring device 44, the fault monitoring device 44 consists of an elastic element 441, a transmission line 442 and a controller 443, the rotor core 41 and the front contact type bearing 43 are pressed on the rotating shaft 42, a resistance strain gauge is arranged at the end part of the elastic element 441 of the fault monitoring device 44, the resistance strain gauge is fixed in a groove of a bearing chamber of the front end cover 1 or the rear end cover 11, the resistance strain gauge is electrically connected with the controller 443 through the transmission line 442, and a filter, an amplifier and, the resistance strain gauge is connected with a filter and an amplifier in the controller 443, the output ends of the filter and the amplifier are connected with an A/D converter, a microchip is embedded in the A/D converter, a display, an alarm and a processing module are further arranged in the controller 443, the processing module is a PLC module, the processing module is connected with the resistance strain gauge of the elastic element 441 through a transmission line 442, and the output end of the processing module is respectively connected with the display and the alarm.

Specifically, the utility model discloses in the low pass filter that the wave filter comprises an operational amplifier LF356 and resistance, electric capacity, the microchip of the inside embedding of AD converter comprises the 8098 singlechip chip.

The working principle of the utility model is as follows: when the rotor core 41 running at high speed is deformed, the outer ring of the contact bearing 43 is stressed unevenly at different positions, uneven acting force acts on the elastic element 441 at the moment, the magnitude of the stress deformation of the elastic element 441 is different, a resistance strain gauge arranged on the elastic element 441 measures a signal of the stress change, the unbalanced strain force is converted into a weak electric signal through an external strain bridge, the weak electric signal penetrates through the front end cover 1 or the rear end cover 11 through a transmission line 442 and is led out, the weak electric signal and an analog signal arranged in the controller 443 are filtered, amplified, sampled and kept and then are transmitted to an A/D (analog/digital) for conversion, a digital signal obtained after conversion is output to a processing module in the controller 443 for analysis, online display after processing and generation of an alarm signal, so that countermeasures can be taken timely, and the rotor fault running at high speed can be pre-judged and detected in real time, the safe and reliable operation of the system is ensured.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a take rotor fault detection device's high-speed motor, includes front end housing (1) and rear end housing (11), frame (2), stator core (3), rotor support (4), its characterized in that: the rotor support (4) comprises a rotor iron core (41), a rotating shaft (42), a front-back contact type bearing (43) and a fault monitoring device (44), the fault monitoring device (44) consists of an elastic element (441), a transmission line (442) and a controller (443), the rotor iron core (41) and the front-back contact type bearing (43) are pressed on the rotating shaft (42), a resistance strain gauge is arranged at the end part of the elastic element (441) of the fault monitoring device (44), the resistance strain gauge is fixed in a groove of a bearing chamber of a front end cover (1) or a rear end cover (11), the resistance strain gauge is electrically connected with the controller (443) through the transmission line (442), a filter, an amplifier and an A/D converter are further arranged in the controller (443), the resistance strain gauge is connected with the filter and the amplifier, and the A/D converter is connected with the filter and the amplifier, the A/D converter is embedded with a microchip.

2. The high-speed motor with the rotor fault detection device according to claim 1, characterized in that: the controller (443) is also internally provided with a display, an alarm and a processing module, the processing module is a PLC module, the processing module is connected with the resistance strain gauge of the elastic element (441) through a transmission line (442), and the output end of the processing module is respectively connected with the display and the alarm.

3. The high-speed motor with the rotor fault detection device according to claim 1, characterized in that: the filtering and amplifying device is a low-pass filter consisting of an operational amplifier LF356, a resistor and a capacitor, and the A/D converter is internally embedded with a microchip consisting of an 8098 singlechip chip.