CN113824270A - A rotating electrical machine overload protection device - Google Patents

A rotating electrical machine overload protection device Download PDF

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Publication number
CN113824270A
CN113824270A CN202010577026.8A CN202010577026A CN113824270A CN 113824270 A CN113824270 A CN 113824270A CN 202010577026 A CN202010577026 A CN 202010577026A CN 113824270 A CN113824270 A CN 113824270A
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overload protection
frame
protection device
cam
microcontroller
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CN113824270B (en
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孙桂涛
张可欣
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)

Abstract

The invention provides an overload protection device for a rotating motor, belongs to the field of motors, and mainly solves the problems that the existing overload protection device for the rotating motor is high in cost and inconvenient to popularize. The invention integrates the functions of overload protection, overload alarm and vibration fault diagnosis of the rotating motor. The cylindrical cam is used for motor overload protection, the inertia measurement unit is used for collecting rotating speed and vibration signals, and information processing is carried out. The motor overload protection device has the advantages of simple and convenient structure, high reliability, low cost and convenience in popularization, and the motor overload protection performance is improved.

Description

Overload protection device for rotating motor
The technical field is as follows:
the invention relates to an overload protection device for a rotating motor, and belongs to the field of motors.
Background art:
motor overload can not be avoided in the actual industrial and agricultural production process, and the motor is very easy to cause irreversible damage to the motor when in overload, so that abnormal operation of a system is caused, and loss is large. However, most of the existing motors are not provided with overload protection devices. Meanwhile, although the motor overload protection device is arranged in an important occasion, the cost is too high, and the motor overload protection device is inconvenient to popularize. Certain challenges are brought to motor protection.
The invention content is as follows:
the invention provides an overload protection device for a rotating motor, which aims to solve the problem that the existing rotating motor has no overload protection or the cost of the overload protection device is too high.
The invention relates to an overload protection device for a rotating motor, which comprises a cam frame (101), a crossed roller bearing (102), a cylindrical cam (103), a plunger frame (104), plungers (105A), (105B) and (105C), linear bearings (106A), (106B) and (106C), pre-tightening springs (107A), (107B) and (107C), pre-tightening bolts (108A), (108B) and (108C), a needle bearing (109), rolling bearings (110A), (110B) and (110C), pin shafts (111A), (111B) and (111C), inertia measuring units (201A), (201B), a conductive slip ring (202), a microcontroller (203), a battery (204), audible and visual alarm devices (205A), (205B), a work indicator light (206) and a battery fixing cover (207).
The cam frame (101) is connected with an outer ring of a crossed roller bearing (102) through bolts, and an inner ring of the crossed roller bearing (102) is connected with a plunger frame (104) through bolts.
One end of the cylindrical cam (103) is matched with the square opening of the cam frame (101) through a square boss, the other end of the cylindrical cam (103) is connected with the inner ring of the needle bearing (109), and the outer ring of the needle bearing (109) is connected with the needle bearing hole of the plunger frame (104).
The pre-tightening bolts (108A), (108B) and (108C) are connected with the plunger frame (104) through threads, one ends of the pre-tightening bolts (108A), (108B) and (108C) are respectively connected with one ends of pre-tightening springs (107A), (107B) and (107C), and the other ends of the pre-tightening springs (107A), (107B) and (107C) are respectively connected with one ends of plungers (105A), (105B) and (105C). The other ends of the plungers (105A), (105B) and (105C) are connected with the inner rings of the rolling bearings (110A), (110B) and (110C) through pin shafts (111A), (111B) and (111C). The cylindrical surfaces of the plungers (105A), (105B) and (105C) are respectively connected with the inner rings of the linear bearings (106A), (106B) and (106C), and the outer rings of the linear bearings (106A), (106B) and (106C) are connected with the plunger frame (104).
The cam frame (101) and the plunger frame (104) are both provided with a flange structure and a key groove structure, and are convenient to be connected with other structures.
The shell of the conductive slip ring (202) is connected with the plunger frame (104), and the inner ring of the conductive slip ring (202) is connected with the cylindrical cam (103).
The inertia measurement unit (201A) is connected with the plunger frame (104) through screws, and the inertia measurement unit (201B), the microcontroller (203), the sound and light alarm devices (205A) and (205B) and the working indicator lamp (206) are connected with the cam frame (101) through screws. The battery fixing cover (207) connects the battery (204) and the cam frame (101) by screw threads.
The output end of the inertia measurement unit (201A) is connected with a shell cable of the conductive slip ring (202) through a cable, and an inner ring cable of the conductive slip ring (202) is connected with the input end of the microcontroller (203) through a lead.
The output end of the inertia measurement unit (201B) is connected with the input end of the microcontroller (203).
The output end of the microcontroller (203) is connected with the audible and visual alarm devices (205A, 205B) and the working indicator lamp (206).
The battery (204) is used for supplying power to the inertial measurement units (201A, 201B), the microcontroller (203), the sound and light alarm devices ((205A, 205B) and the work indicator lamp (206).
A round hole is formed in the center of the cylindrical cam (103), so that a cable can conveniently pass through the round hole.
The inertial measurement units (201A, 201B) are capable of outputting triaxial angular velocity and triaxial acceleration information in a Cartesian coordinate system. And respectively measuring the rotating speed and the vibration information of the plunger frame (104) and the cam frame (101) relative to an inertial coordinate system.
The microcontroller (203) is used for receiving output information of the inertia measurement units (201A, 201B) and monitoring whether the motor is overloaded or not and whether a vibration fault occurs or not. And when a fault occurs, alarm information is sent out through the sound and light alarm devices (205A) and (205B).
The invention has the advantages that: the invention integrates the functions of motor overload protection, alarming and vibration fault detection into a whole, and has the advantages of simple structure, small volume, light weight, reliable overload protection and convenient connection.
Drawings
Fig. 1 motor overload protection device structure diagram
FIG. 2 electrical structure block diagram of overload protection device of motor
Fig. 3 motor overload protection device A is to view
Fig. 4 cross-sectional view of the plunger assembly B-B of the overload protection device of the motor
Fig. 5 motor overload protection device plunger assembly C-C rotary you section view
Detailed Description
The specific implementation mode is as follows: the principle of the overload protection device for a rotating electrical machine will be described with reference to fig. 1, 2, 3, 4 and 5. The invention relates to an overload protection device for a rotating motor, which comprises a cam frame (101), a crossed roller bearing (102), a cylindrical cam (103), a plunger frame (104), plungers (105A), (105B) and (105C), linear bearings (106A), (106B) and (106C), pre-tightening springs (107A), (107B) and (107C), pre-tightening bolts (108A), (108B) and (108C), a needle bearing (109), rolling bearings (110A), (110B) and (110C), pin shafts (111A), (111B) and (111C), inertia measuring units (201A), (201B), a conductive slip ring (202), a microcontroller (203), a battery (204), audible and visual alarm devices (205A), (205B), a work indicator light (206) and a battery fixing cover (207).
The cam frame (101) is connected with an outer ring of a crossed roller bearing (102) through bolts, and an inner ring of the crossed roller bearing (102) is connected with a plunger frame (104) through bolts.
One end of the cylindrical cam (103) is matched with the square opening of the cam frame (101) through a square boss, the other end of the cylindrical cam (103) is connected with the inner ring of the needle bearing (109), and the outer ring of the needle bearing (109) is connected with the needle bearing hole of the plunger frame (104).
The pre-tightening bolts (108A), (108B) and (108C) are connected with the plunger frame (104) through threads, one ends of the pre-tightening bolts (108A), (108B) and (108C) are respectively connected with one ends of pre-tightening springs (107A), (107B) and (107C), and the other ends of the pre-tightening springs (107A), (107B) and (107C) are respectively connected with one ends of plungers (105A), (105B) and (105C). The other ends of the plungers (105A), (105B) and (105C) are connected with the inner rings of the rolling bearings (110A), (110B) and (110C) through pin shafts (111A), (111B) and (111C). The cylindrical surfaces of the plungers (105A), (105B) and (105C) are respectively connected with the inner rings of the linear bearings (106A), (106B) and (106C), and the outer rings of the linear bearings (106A), (106B) and (106C) are connected with the plunger frame (104).
The cam frame (101) and the plunger frame (104) are both provided with a flange structure and a key groove structure, and are convenient to be connected with other structures.
The shell of the conductive slip ring (202) is connected with the plunger frame (104), and the inner ring of the conductive slip ring (202) is connected with the cylindrical cam (103).
The inertia measurement unit (201A) is connected with the plunger frame (104) through screws, and the inertia measurement unit (201B), the microcontroller (203), the sound and light alarm devices (205A) and (205B) and the working indicator lamp (206) are connected with the cam frame (101) through screws. The battery fixing cover (207) connects the battery (204) and the cam frame (101) by screw threads.
The output end of the inertia measurement unit (201A) is connected with a shell cable of the conductive slip ring (202) through a cable, and an inner ring cable of the conductive slip ring (202) is connected with the input end of the microcontroller (203) through a lead.
The output end of the inertia measurement unit (201B) is connected with the input end of the microcontroller (203).
The output end of the microcontroller (203) is connected with the audible and visual alarm devices (205A, 205B) and the working indicator lamp (206).
The battery (204) is used for supplying power to the inertial measurement units (201A, 201B), the microcontroller (203), the sound and light alarm devices ((205A, 205B) and the work indicator lamp (206).
A round hole is formed in the center of the cylindrical cam (103), so that a cable can conveniently pass through the round hole.
The inertial measurement units (201A, 201B) are capable of outputting triaxial angular velocity and triaxial acceleration information in a Cartesian coordinate system. And respectively measuring the rotating speed and the vibration information of the plunger frame (104) and the cam frame (101) relative to an inertial coordinate system.
The microcontroller (203) is used for receiving output information of the inertia measurement units (201A, 201B) and monitoring whether the motor is overloaded or not and whether a vibration fault occurs or not. And when a fault occurs, alarm information is sent out through the sound and light alarm devices (205A) and (205B).
When the motor is not overloaded, the output shaft of the motor drives the plunger frame (104) to rotate, and because the torque is smaller, the axial component force of the plungers (105A), (105B) and (105C) is smaller, and the plungers (105A), (105B) and (105C) do not move axially, so that the cylindrical cam (103) is driven to rotate. The rotation speed of the plunger frame (104) is the same as that of the cylindrical cam (103). The cylindrical cam (103) drives the cam frame (101) to rotate, and torque and rotating speed transmission is achieved. At the moment, the angular velocity information output by the inertia measurement units (201A, 201B) received by the microcontroller (203) is the same, and the microcontroller (203) controls the work indicator lamp (206) to light up
When the motor is overloaded, the output shaft of the motor drives the plunger frame (104) to rotate, the axial component force of the plungers (105A), (105B) and (105C) is larger due to larger torque, the plungers (105A), (105B) and (105C) axially move, and the rolling bearings (110A), (110B) and (110C) move on the contour line of the cylindrical cam (103). The rotating speed of the cylindrical cam (103) is less than that of the plunger frame (104). At the moment, angular velocity information output by the inertia measurement units (201A) and (201B) received by the microcontroller (203) is different, the microcontroller (203) controls the working indicator lamp (206) to be turned off, and the sound-light alarm device (205A) works to send out an overload signal.
When the motor has a vibration fault, the linear acceleration information output by the inertia measurement units (201A) and (201B) received by the microcontroller (203) is different, the microcontroller (203) controls the working indicator lamp (206) to be turned off, the audible and visual alarm device (205B) works, and a vibration fault signal is sent out.
The operation of the invention comprises the following working conditions:
the working condition I is as follows: when the motor is not overloaded, the output shaft of the motor drives the plunger frame (104) to rotate, and because the torque is smaller, the axial component force of the plungers (105A), (105B) and (105C) is smaller, and the plungers (105A), (105B) and (105C) do not move axially, so that the cylindrical cam (103) is driven to rotate. The rotation speed of the plunger frame (104) is the same as that of the cylindrical cam (103). The cylindrical cam (103) drives the cam frame (101) to rotate, and torque and rotating speed transmission is achieved. At the moment, the angular velocity information output by the inertia measurement units (201A, 201B) received by the microcontroller (203) is the same, and the microcontroller (203) controls the work indicator lamp (206) to light up
Working conditions are as follows: when the motor is overloaded, the output shaft of the motor drives the plunger frame (104) to rotate, the axial component force of the plungers (105A), (105B) and (105C) is larger due to larger torque, the plungers (105A), (105B) and (105C) axially move, and the rolling bearings (110A), (110B) and (110C) move on the contour line of the cylindrical cam (103). The rotating speed of the cylindrical cam (103) is less than that of the plunger frame (104). At the moment, angular velocity information output by the inertia measurement units (201A) and (201B) received by the microcontroller (203) is different, the microcontroller (203) controls the working indicator lamp (206) to be turned off, and the sound-light alarm device (205A) works to send out an overload signal.
Working conditions are as follows: when the motor is in vibration failure, the linear acceleration information output by the inertia measurement units (201A) and (201B) received by the microcontroller (203) is different, the microcontroller (203) controls the working indicator lamp (206) to be turned off, and the sound-light alarm device (205B) works to send out a vibration failure signal.

Claims (6)

1.一种旋转电机过载保护装置，它包括凸轮框架（101）、交叉滚子轴承（102）、圆柱凸轮（103）、柱塞框架（104）、柱塞（105A）、（105B）、（105C）、直线轴承（106A）、（106B）、（106C）、预紧弹簧（107A）、（107B）、（107C）、预紧螺栓（108A）、（108B）、（108C）、滚针轴承（109）、滚动轴承（110A）、（110B）、（110C）、销轴（111A）、（111B）、（111C）、惯性测量单元（201A）、（201B）、导电滑环（202）、微控制器（203）、电池（204）、声光报警装置（205A）、（205B）、工作指示灯（206）、电池固定盖（207）；1. An overload protection device for a rotating electrical machine, comprising a cam frame (101), a crossed roller bearing (102), a cylindrical cam (103), a plunger frame (104), plungers (105A), (105B), ( 105C), Linear Bearings (106A), (106B), (106C), Preload Springs (107A), (107B), (107C), Preload Bolts (108A), (108B), (108C), Needle Roller Bearings (109), rolling bearings (110A), (110B), (110C), pins (111A), (111B), (111C), inertial measurement units (201A), (201B), conductive slip rings (202), micro Controller (203), battery (204), sound and light alarm devices (205A), (205B), working indicator light (206), battery fixing cover (207); 所述凸轮框架（101）通过螺栓与交叉滚子轴承（102）外圈连接，所述交叉滚子轴承（102）内圈通过螺栓与柱塞框架（104）连接；The cam frame (101) is connected to the outer ring of the crossed roller bearing (102) by bolts, and the inner ring of the crossed roller bearing (102) is connected to the plunger frame (104) by bolts; 所述圆柱凸轮（103）一端通过方形凸台与凸轮框架（101）方形口配合，所述圆柱凸轮（103）另一端与滚针轴承（109）内圈连接，所述滚针轴承（109）外圈与柱塞框架（104）滚针轴承孔连接；One end of the cylindrical cam (103) is matched with the square mouth of the cam frame (101) through a square boss, and the other end of the cylindrical cam (103) is connected to the inner ring of a needle roller bearing (109), and the needle roller bearing (109) The outer ring is connected with the needle roller bearing hole of the plunger frame (104); 所述预紧螺栓（108A）、（108B）、（108C）通过螺纹与柱塞框架（104）连接，所述预紧螺栓（108A）、（108B）、（108C）一端分别与预紧弹簧（107A）、（107B）、（107C）一端连接，所述预紧弹簧（107A）、（107B）、（107C）另一端分别与柱塞（105A）、（105B）、（105C）一端连接，所述柱塞（105A）、（105B）、（105C）另一端通过销轴（111A）、（111B）、（111C）与滚动轴承（110A）、（110B）、（110C）内圈连接，所述柱塞（105A）、（105B）、（105C）圆柱面分别与直线轴承（106A）、（106B）、（106C）内圈连接，所述直线轴承（106A）、（106B）、（106C）外圈与柱塞框架（104）连接；The preload bolts (108A), (108B), (108C) are connected with the plunger frame (104) through threads, and one end of the preload bolts (108A), (108B), (108C) is respectively connected to the preload spring ( 107A), (107B), (107C) are connected at one end, and the other ends of the preload springs (107A), (107B), (107C) are respectively connected with one end of the plunger (105A), (105B), (105C), so The other ends of the plungers (105A), (105B) and (105C) are connected to the inner rings of the rolling bearings (110A), (110B) and (110C) through pins (111A), (111B) and (111C). The cylindrical surfaces of the plugs (105A), (105B) and (105C) are respectively connected with the inner rings of the linear bearings (106A), (106B) and (106C), and the outer rings of the linear bearings (106A), (106B) and (106C) are respectively connected with the plunger frame (104); 所述凸轮框架（101）和柱塞框架（104）均具有法兰和键槽两种结构，便于与其他结构连接；Both the cam frame (101) and the plunger frame (104) have two structures of flange and keyway, which are convenient for connection with other structures; 所述导电滑环（202）外壳与柱塞框架（104）连接，所述导电滑环（202）内圈与圆柱凸轮（103）连接；The outer shell of the conductive slip ring (202) is connected with the plunger frame (104), and the inner ring of the conductive slip ring (202) is connected with the cylindrical cam (103); 所述惯性测量单元（201A）通过螺钉与柱塞框架（104）连接，所述惯性测量单元（201B）、微控制器（203）、声光报警装置（205A）、（205B）、工作指示灯（206）通过螺钉与凸轮框架（101）连接，所述电池固定盖（207）通过螺纹将电池（204）与凸轮框架（101）连接；The inertial measurement unit (201A) is connected with the plunger frame (104) through screws, and the inertial measurement unit (201B), microcontroller (203), sound and light alarm devices (205A), (205B), working indicator lights (206) is connected with the cam frame (101) through screws, and the battery fixing cover (207) connects the battery (204) with the cam frame (101) through threads; 所述惯性测量单元（201A）输出端通过电缆与导电滑环（202）外壳电缆连接，所述导电滑环（202）内圈电缆通过导线与微控制器（203）输入端连接；The output end of the inertial measurement unit (201A) is connected to the outer casing cable of the conductive slip ring (202) through a cable, and the inner ring cable of the conductive slip ring (202) is connected to the input end of the microcontroller (203) through a wire; 所述惯性测量单元（201B）输出端与微控制器（203）输入端连接；The output end of the inertial measurement unit (201B) is connected to the input end of the microcontroller (203); 所述微控制器（203）输出端与声光报警装置（205A）、（205B）、工作指示灯（206）连接；The output end of the microcontroller (203) is connected with the sound and light alarm devices (205A), (205B) and the working indicator light (206); 所述电池（204）用于向惯性测量单元（201A）、（201B）、微控制器（203）、声光报警装置（（205A）、（205B）和工作指示灯（206）供电；The battery (204) is used to supply power to the inertial measurement units (201A), (201B), the microcontroller (203), the sound and light alarm device ((205A), (205B) and the working indicator light (206); 所述圆柱凸轮（103）中心开设圆孔，便于电缆通过；A circular hole is provided in the center of the cylindrical cam (103) to facilitate the passage of cables; 所述惯性测量单元（201A）、（201B）能够输出笛卡尔坐标系下的三轴角速度和三轴线加速度信息，分别测量柱塞框架（104）和凸轮框架（101）相对惯性坐标系的转速和振动信息；The inertial measurement units (201A) and (201B) are capable of outputting triaxial angular velocity and triaxial acceleration information in the Cartesian coordinate system, respectively measuring the rotational speed and the relative inertial coordinate system of the plunger frame (104) and the cam frame (101). vibration information; 所述微控制器（203）用于接收惯性测量单元（201A）、（201B）输出信息，监测电机是否过载、是否发生振动故障，并在故障发生时通过声光报警装置（205A）、（205B）发出报警信息。The microcontroller (203) is used to receive the output information of the inertial measurement units (201A), (201B), monitor whether the motor is overloaded and whether a vibration fault occurs, and when the fault occurs, the sound and light alarm devices (205A), (205B) ) to issue an alarm message. 2.根据权利要求1所述的一种旋转电机过载保护装置，其特征在于利用圆柱凸轮实现电机过载防护，在过载消除后，过载防护装置复位，实现电机转速和扭矩无差别传输。2 . The overload protection device for a rotating electrical machine according to claim 1 , wherein the motor overload protection is realized by using a cylindrical cam, and after the overload is eliminated, the overload protection device is reset to realize indiscriminate transmission of motor speed and torque. 3 . 3.根据权利要求1所述的一种旋转电机过载保护装置，其特征在于可实现电机的正反方向的过载保护。3 . The overload protection device for a rotating electrical machine according to claim 1 , wherein the overload protection of the forward and reverse directions of the motor can be realized. 4 . 4.根据权利要求1所述的一种旋转电机过载保护装置，其特征在于可通过预紧螺栓实现过载力设置。4 . The overload protection device for a rotating electrical machine according to claim 1 , wherein the overload force setting can be realized by pre-tightening bolts. 5 . 5.根据权利要求1所述的一种旋转电机过载保护装置，其特征在于利用惯性测量单元实现过载速度测量，并发出声光报警。5 . The overload protection device for a rotating electrical machine according to claim 1 , wherein the inertial measurement unit is used to measure the overload speed, and an audible and visual alarm is issued. 6 . 6.根据权利要求1所述的一种旋转电机过载保护装置，其特征在于可实现振动故障的诊断和报警。6 . The overload protection device for a rotating electrical machine according to claim 1 , wherein the diagnosis and alarm of vibration faults can be realized. 7 .
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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612991A1 (en) * 1993-02-25 1994-08-31 Daniel Fuchs Device for measuring torque between a motor assembly and a load assembly
JP2013076395A (en) * 2011-09-12 2013-04-25 Jtekt Corp Power generating device
CN103868636A (en) * 2014-03-19 2014-06-18 中北大学 A Rotary Shaft Torque Dynamic Measurement Monitoring System
CN104505989A (en) * 2014-12-30 2015-04-08 湖南长重机器股份有限公司 Intelligent motor
CN204269368U (en) * 2014-12-19 2015-04-15 湖南科技大学 Comprehensive test bench for fault diagnosis of helicopter tail drive system
CN104683670A (en) * 2014-12-26 2015-06-03 常州市盛和电子有限公司 Anti-explosion image pickup instrument
CN105094164A (en) * 2015-08-13 2015-11-25 舒能（苏州）工业技术有限公司 Flexible shaft torque overload protection method and flexible shaft with torque overload protection
CN109211551A (en) * 2018-09-14 2019-01-15 南京梵科智能科技有限公司 A kind of trouble-shooter for rotating machinery

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0612991A1 (en) * 1993-02-25 1994-08-31 Daniel Fuchs Device for measuring torque between a motor assembly and a load assembly
JP2013076395A (en) * 2011-09-12 2013-04-25 Jtekt Corp Power generating device
CN103868636A (en) * 2014-03-19 2014-06-18 中北大学 A Rotary Shaft Torque Dynamic Measurement Monitoring System
CN204269368U (en) * 2014-12-19 2015-04-15 湖南科技大学 Comprehensive test bench for fault diagnosis of helicopter tail drive system
CN104683670A (en) * 2014-12-26 2015-06-03 常州市盛和电子有限公司 Anti-explosion image pickup instrument
CN104505989A (en) * 2014-12-30 2015-04-08 湖南长重机器股份有限公司 Intelligent motor
CN105094164A (en) * 2015-08-13 2015-11-25 舒能（苏州）工业技术有限公司 Flexible shaft torque overload protection method and flexible shaft with torque overload protection
CN109211551A (en) * 2018-09-14 2019-01-15 南京梵科智能科技有限公司 A kind of trouble-shooter for rotating machinery

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