CN108288847A - A kind of air compressor motor jumps vehicle protection system and its control method - Google Patents
A kind of air compressor motor jumps vehicle protection system and its control method Download PDFInfo
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- CN108288847A CN108288847A CN201710013717.3A CN201710013717A CN108288847A CN 108288847 A CN108288847 A CN 108288847A CN 201710013717 A CN201710013717 A CN 201710013717A CN 108288847 A CN108288847 A CN 108288847A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/0805—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors for synchronous motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
- H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/093—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against increase beyond, or decrease below, a predetermined level of rotational speed
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- Control Of Positive-Displacement Pumps (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention discloses a kind of air compressor motors to jump vehicle protection system and its control method, avoids speed detector failure itself from causing air compressor motor malfunction and jumps vehicle, and tach signal ground connection is more reasonable, utmostly reduces the risk interfered by other electric signals；It avoids single temperature probe failure itself or the bad initiation air compressor motor malfunction of wiring in threephase stator temperature from jumping vehicle, and provides and maintain under air compressor machine normal operating conditions, the method for the fast normal thermometric of quick-recovery；It avoids single vibration detection device failure itself from causing air compressor motor malfunction and jumps vehicle, and provide and judge that the high failure of abnormal vibration is derived from detection device failure itself or the true abnormal reference frame of motor oscillating actually；It avoids oil inlet flow switch failure itself from causing air compressor motor malfunction and jumps vehicle, and retain warning function, convenient for noting abnormalities and handling in time.
Description
Technical field
The present invention relates to deep cooling technical field of oxygen generation more particularly to a kind of air compressor motor to jump vehicle protection system and its control
Method.
Background technology
In cryogenics oxygen technique, air compressor machine is the portal of entire oxygenerator, and raw air is provided for air separation unit,
It is with a very important position.It runs well for driving air compressor machine, the general large synchronous motor (abbreviation motor) for selecting power larger
Power source as air compressor machine.Fig. 1 is that air compressor motor protects system measurement instrument configuration schematic diagram, and 10 be air compressor machine, and 11 are
Shaft, 30 be motor, and 20 be the gear speedup case for connecting air compressor machine 10 and motor 30.In order to motor 30 can safe operation, one
The dedicated electic protection of well matched standby high voltage synchronous machine and external fault protection, by related operating parameter it is stringent monitor come
Reach protection purpose.When operating parameter is abnormal and numerical value reaches protection systemic presupposition value, triggering interlock protection action, or
Person alarms, or directly jumps vehicle, and motor 30 is enabled to be automatically stopped operating, i.e. air compressor machine 10 jumps vehicle.
Fig. 2 is that motor speed loop structure schematic diagram, air compressor motor 30 have slow-speed of revolution jump vehicle to interlock in the prior art, one
30 rotating speed of denier motor be less than setting value, will cause jump vehicle, the circuit mainly by Rotating speed measring probe 341, pusher side junction box 343,
Speed changer 342, jump vehicle or logical operation block 40 and jump vehicle execution module 50 are electrically connected to form.Fig. 3 is in the prior art
Protection system for motor principle schematic, part A are located at live motor pusher side, and part B is located at electric panel room.Certain air compressor machine was once repeatedly sent out
Vehicle is jumped in the raw slow-speed of revolution.The discovery of its rotating speed trend is observed, Chinese herbaceous peony speed revolution value big ups and downs are being jumped, when numerical value is less than setting value,
Air compressor machine 10 is caused to jump vehicle.According to phenomenon analysis, it is not possible that such big ups and downs, air compressor machine 10 was sent out at that time flows actual speed
Significant change does not also occur for amount and pressure, successively replaces rotational speed probe 341, rotating speed transducer 342 and connecting line, failure and remains unchanged；
After be judged as that transmitting signal is interfered and causes to fluctuate, vehicle is jumped in false triggering interlocking, and non-programmed halt is caused to lose.Further check
Signal ground situation, installation specification require the signal wire wherein one end of rotating speed circuit from scene to electric panel room that must be grounded, and former
345 are grounded in electric panel room side in design, is met the requirements；But after removing electric panel room earth point 345, tach signal does not reproduce
Fluctuation is judged as in electric panel room that common ground point has interference then.In addition, if detection component itself breaks down, also can
Lead to air compressor machine false tripping vehicle, non-programmed halt is caused to lose.
In Fig. 1, Fig. 3, motor threephase stator temperature is by being respectively arranged in 3 thermometrics of R, S, T three-phase inside motor
Probe after drawing wiring, by temperature signal teletransmission control system, and participates in protection system and jumps vehicle interlocking.When in 3 temperature probes
It is any when there are the failures such as poor contact or open circuit, damage, will triggering interlocking malfunction, lead to air compressor machine false tripping vehicle, cause non-
Planned shut-down loses.
Respectively there is 1 pair of vibration detection device in motor load side with anti-load side, totally 2 pairs 4 groups；1 vibration probe, 1 vibration
Converter is electrically connected by being electrically connected to form 1 group of vibration detection device, and with distant place control system, participates in jumping vehicle control.In reality
In use, when any one group of vibration values are extremely high in 4 groups and reach jump vehicle value, motor is protected and jumps vehicle on border；But when any
When vibration detection device failure itself causes numerical value to malfunction, air compressor machine false tripping vehicle is also resulted in, non-programmed halt is caused to lose.
Motor load side and anti-load side oil inlet pipe are respectively equipped with flow switch 311,312, when oil stream amount is low in oil inlet pipe
When setting flow, vehicle is jumped in contact closure, trigger protection system interlock action；But when flow switch failure malfunctions, equally
Lead to meeting air compressor machine false tripping vehicle, non-programmed halt is caused to lose.
In conclusion the rotating speed of air compressor motor, threephase stator temperature, vibration, into many operating parameters such as oil stream amount
Have it is any can directly result in air compressor machine and jump vehicle when there is exception or failure, if malfunction, then air compressor machine false tripping vehicle, safety
Operation risk is larger, and non-programmed halt loss is serious.
Invention content
The object of the present invention is to provide a kind of air compressor motors to jump vehicle protection system and its control method, can turn in motor
When speed, vibration, temperature, oil stream amount etc. protect system measurement instrument failure or malfunction, remains to protection motor and run well, avoid
Malfunction triggering false tripping vehicle causes non-programmed halt to lose.
Required the technical issues of solving of the invention, can be achieved through the following technical solutions：
A kind of air compressor motor jump vehicle protection system, including air compressor machine (10), gearbox (20), motor (30), rotating speed list
Member, threephase stator temperature unit, oil inlet flow cell, jumps vehicle control unit at vibration unit；
The motor (30) connects air compressor machine (10) by gearbox (20), and motor (30), which is powered, operates driving air compressor machine
(10) it operates, raw air is pressurized and is exported by air compressor machine (10)；
The rotating speed unit includes rotational speed probe (341), pusher side junction box (343), speed changer (342), motor electricity
Stream signal (35) and rotating speed judgment module (44), rotational speed probe (341) are installed on motor (30) anti-load side, are connect by pusher side
It after line case (343) connection, transition, is electrically connected with speed changer (342) in the electric panel room of a distant place, rotational speed output signal and motor electricity
(35) signal is flowed to be electrically connected with rotating speed judgment module (44) together；Rotating speed judgment module (44) passes through the synthesis to the two signal
Analysis, judges motor speed situation, and will determine that result is transmitted to and jump vehicle control unit；
The vibration unit includes the 1st group of vibration detection device of vibration probe (321), vibratory converter (323) composition,
2nd group of vibration detection device of vibration probe (322), vibratory converter (324) composition, vibration probe (325), vibratory converter
(327) the 3rd group of vibration detection device formed, the 4th group of vibration detection that vibration probe (326), vibratory converter (328) form
Device and load side vibration judgment module (42), anti-load side vibration judgment module (43)；1st group and the 2nd group of vibration detection
Device is the 1st pair, and common detection load side vibration, the 3rd group and the 4th group is the 2nd pair, detects anti-load side vibration jointly；It is each pair of
Vibration is all in 90 ° two-by-two, and respectively with level in left 45 °, right 45 ° of installations, is referred to as X to, Y-direction, joint characterization shaft exists
Vibration variable quantity in one plane quadrant；Load side vibrates judgment module (42) and anti-load side vibration judgment module (43),
Corresponding vibration detection signal is received respectively, motor oscillating detection case is judged, and will determine that result is transmitted to jump vehicle
Control unit；
The threephase stator temperature unit includes R phase temperature measurement on-lines probe (331a), spare temperature probe (331b), S phases
Temperature measurement on-line probe (332a), spare temperature probe (332b), T-phase temperature measurement on-line probe (333a), spare temperature probe
(333b) and temperature judgment module (41)；All 6 temperature probes draw the machine for being wired to outside motor inside motor
Side junction box, wherein temperature measurement on-line pop one's head in (331a), temperature measurement on-line probe (332a), temperature measurement on-line probe (333a) are sentenced with temperature
Disconnected module (41) electrical connection；Temperature judgment module (41) receives threephase stator temperature signal, to motor threephase stator temperature feelings
Condition judges, and will determine that result is transmitted to and jump vehicle control unit；
The oil inlet flow cell includes load side oil inlet flow switch (311), anti-load side oil inlet flow switch
(312), load side bearing temperature signal (361), anti-load side bearing temperature signal (362) and load side judge into oil stream amount
Module (45), anti-load side are into oil stream amount judgment module (46)；Load side into oil stream amount judgment module (45) receive load side into
Oil stream amount switchs (311) and (361) two signals of load side bearing temperature signal, right by the comprehensive analysis to the two signal
Oil inlet situation in motor load side judges, and will determine that result is transmitted to and jump vehicle control unit；Anti- load side is sentenced into oil stream amount
Disconnected module (46) receives (362) two signals of anti-load side oil inlet flow switch (312) and anti-load side bearing temperature signal, leads to
The comprehensive analysis to the two signal is crossed, the anti-load side oil inlet situation of motor is judged, and will determine that result is transmitted to jump vehicle
Control unit；
The jump vehicle control unit includes jumping vehicle judgment module (40), jumping vehicle execution module (50), jumps vehicle judgment module
(40) rotating speed judgment module (44), load side vibration judgment module (42), anti-load side vibration judgment module (43), temperature are received
Judgment module (41), load side are into oil stream amount judgment module (45) and anti-load side into the judgement of oil stream amount judgment module (46)
Journey signal, and comprehensive all deterministic process signals, make further judging result, and be transmitted to and jump vehicle execution module (50),
Protection is sent out to motor (30) jump vehicle control signal from jump vehicle execution module (50).
Preferably, the signal ground line (345) of the rotating speed unit is located at scene, the probe wire of rotational speed probe (341) from
Pusher side junction box (343) is led to inside motor (30) to be grounded afterwards.
Preferably, 6 temperature probes in the threephase stator temperature unit select thermal resistance, using four-wire system wiring side
Formula is wired to the pusher side junction box of outside motor from the internal extraction of motor (30)；In wherein 3 temperature measurement on-lines probe any with
Temperature judgment module (41) is all made of three-wire system connection when being electrically connected.
Preferably, the flow switch in the oil inlet flow cell is by sliding block of the inside with spring and external magnetic switching group
At.
Preferably, the jump vehicle judgment module (40), jump vehicle execution module (50) and rotating speed judgment module (44), load
Side vibration judgment module (42), anti-load side vibration judgment module (43), temperature judgment module (41), load side are sentenced into oil stream amount
Disconnected module (45) and anti-load side into oil stream amount judgment module (46) be dcs.
A kind of air compressor motor jumps the control method of vehicle protection system, includes the following steps：
S1, start air compressor motor, driving air compressor machine operating：After air compressor machine load, motor is made to reach synchronous with air compressor machine,
And normal operation input, convey process after compressed air to oxygenerator；
S2, rotating speed jump vehicle protection：When air compressor machine normal operation, rotating speed should be a relative constant value；
S2.1, increase delay function in rotating speed judgment module, when tach signal is fluctuated in fast peak and touches jump vehicle
Value, but the signal perdurabgility be less than preset delay value when, then be judged as external signal interference rather than motor speed it is really different
Often, it is filtered and is noted down, be simultaneously emitted by alarm signal, it is abnormal to inform that staff's rotating speed unit exists；
S2.2, rotating speed abnormal signal are interlocked with 30 electric current of motor again, and when load increase or motor desynchronizing, rotating speed just can be true
It is real to reduce, and both of which will cause electric current to increase, when rotating speed abnormal signal is more than delay, and motor in the unit interval
30 curent changes are more than preset value, then it is assumed that rotating speed really reduces, i.e. vehicle is jumped in triggering interlocking, the protection of motor 30, is otherwise only sent out
Alarm signal is without jumping vehicle；
S3, threephase stator temperature jump vehicle protection：Motor threephase stator temperature, which really rises, is required to a period of time, will not dash forward
Become；Threephase stator coil is intertwined in structure, and when a wherein phase temperature anomaly, remaining two-phase temperature also can be in difference
Degree rises；
S3.1, when any phase heat alarm and when jumping vehicle signal while occurring, it is judged as wiring open circuit or thermal resistance
Failure itself, does not jump vehicle, only sends out alarm；When only having a phase temperature display exception in three-phase temperature, it is judged as poor contact
Or thermal resistance failure itself, vehicle is not jumped, alarm is only sent out；
S3.2, it first alarms when wherein two-phase or three-phase temperature, it is synchronous after a period of time to rise, there is a phase to arrive
Up to jump vehicle value, then it is assumed that be true temperature height performance, that is, send out and jump vehicle signal；
S3.3 connects when the thermal resistance of Faulty Temperature in three lines, when only 1 wire break, is then opened in pusher side junction box
With privates, new three-wire system, the transmission of recovery temperature signal are constituted；When the thermal resistance of Faulty Temperature connects in three lines, there are 2
Or when 3 line open circuits, then spare thermal resistance is enabled in pusher side junction box, substitute failure thermal resistance；
S4, vibration jump vehicle protection：When machine shaft vibration is true abnormal high, the vibration variable quantity of shaft should be in axial direction
It is moved from X into the plane quadrant constituted with Y-direction on section, i.e. X is to when variation, and Y-direction also changes, and vice versa；
S4.1, cancel the extremely high jump vehicle interlocking of single vibration values in vibrating judgment module but retain warning function, and increase
Add the difference operation with a pair of of vibration signal；
S4.2, when in vibration, single vibration values are extremely high but another vibration values are normal, and the difference operation of the two
As a result when larger, then the high vibration of the exception sends out alarm, and difference operation also sends out alarm, but does not jump vehicle, reminds work at this time
Make that the vibration of personnel's machine shaft is not genuine abnormal high, but there are monomer failures for the high vibration detection device of the single exception；
S4.3, when with to X it is abnormal high to 2 vibrations of, Y-direction, and difference operation result is smaller, that is, is less than preset value
When, show that motor shaft vibration is genuine abnormal high, then triggers interlocking, air compressor motor protection is enabled to jump vehicle；
S5, vehicle protection is jumped into oil stream amount：It is the indirect protection of bearing bush temperature height protection into oil stream amount minimum living protective function, once
Into oil stream amount really down to a certain degree, bearing bush temperature can accordingly rise, such as really low into oil stream amount, then can lead to bearing bush temperature
It is true high；
S5.1, flow is low directly to jump vehicle interlocking but retains warning function into cancelling in oil stream amount judgment module, and will be into
Oil stream amount is switched to be interlocked with corresponding homonymy motor bearing temperature；
S5.2 is acted when into oil stream amount low switch, but homonymy bearing bush temperature does not change, then is judged as flow switch itself
Failure only sends out alarm signal, when homonymy bearing bush temperature also rises simultaneously, and reaches preset value, then triggers interlocking and jumps vehicle.
Beneficial effects of the present invention：A kind of air compressor motor jumps vehicle protection system and its control method, avoids Rotating speed measring
Device failure itself causes air compressor motor malfunction and jumps vehicle, and tach signal ground connection is more reasonable, utmostly reduces by it
The risk of its electric signal interference；Avoid single temperature probe failure itself or the bad initiation pneumatics of wiring in threephase stator temperature
Vehicle is jumped in electromechanical chance error action, and is provided and maintained under air compressor machine normal operating conditions, the method for the fast normal thermometric of quick-recovery；It keeps away
Exempt from single vibration detection device failure itself and cause air compressor motor malfunction jump vehicle, and provides and judge the high failure of abnormal vibration
It is derived from detection device failure itself or the true abnormal reference frame of motor oscillating actually；Oil inlet flow switch is avoided originally to die
Barrier causes air compressor motor malfunction and jumps vehicle, and retains warning function, convenient for noting abnormalities and handling in time.
Description of the drawings
The present invention will be further described with reference to the accompanying drawings and detailed description：
Fig. 1 is air compressor motor protection system measurement instrument configuration schematic diagram.
Fig. 2 is motor speed loop structure schematic diagram in the prior art.
Fig. 3 is protection system for motor principle schematic in the prior art.
Fig. 4 is motor speed loop structure schematic diagram in the present invention.
Fig. 5 is protection system for motor principle schematic in the present invention.
Fig. 6 is control method flow chart of the present invention.
Specific implementation mode
In order to which the content and advantage that make technical solution of the present invention are of greater clarity, below in conjunction with the accompanying drawings to the present invention into one
Step description.
In conjunction with Fig. 4, Fig. 5, a kind of air compressor motor jump vehicle protection system, including：Motor air compressor machine 10, gearbox 20, electricity
Machine 30, vibration unit, threephase stator temperature unit, oil inlet flow cell, jumps vehicle control unit at rotating speed unit.
Motor 30 connects air compressor machine 10 by gearbox 20, and motor 30, which is powered, operates the driving operating of air compressor machine 10, air compressor machine
Raw air is pressurized and is exported by 10；
Rotating speed unit include rotational speed probe 341, pusher side junction box 343, speed changer 342, motor current signal 35 with
And rotating speed judgment module 44, rotational speed probe 341 are installed on 30 anti-load side of motor, pass through the connection of pusher side junction box 343, transition
Afterwards, it is electrically connected with speed changer 342 in the electric panel room of a distant place, rotational speed output signal and 35 signal of current of electric are sentenced with rotating speed together
Disconnected module 44 is electrically connected；Rotating speed judgment module 44 is made motor speed situation and is sentenced by the comprehensive analysis to the two signal
It is disconnected, and will determine that result is transmitted to and jump vehicle control unit；
Vibration unit includes the 1st group of vibration detection device of vibration probe 321, the composition of vibratory converter 323, vibration probe
322, vibratory converter 324 form the 2nd group of vibration detection device, vibration probe 325, vibratory converter 327 form the 3rd group
Vibration detection device, the 4th group of vibration detection device and load side vibration that vibration probe 326, vibratory converter 328 form
Judgment module 42, anti-load side vibrate judgment module 43；1st group and the 2nd group of vibration detection device are the 1st pair, and common detection is negative
Lotus side vibrates, and the 3rd group and the 4th group is the 2nd pair, detects anti-load side vibration jointly；Each pair of vibration is all in 90 ° two-by-two, and respectively
With level in left 45 °, right 45 ° of installations, X is referred to as to, Y-direction, vibration of the joint characterization shaft in a plane quadrant becomes
Change amount；Load side vibrates judgment module 42 and anti-load side vibrates judgment module 43, receives corresponding vibration detection signal respectively,
Motor oscillating detection case is judged, and will determine that result is transmitted to and jump vehicle control unit；
Threephase stator temperature unit includes R phase temperature measurement on-lines probe 331a, spare temperature probe 331b, S phase temperature measurement on-lines
Pop one's head in 332a, spare temperature probe 332b, and T-phase temperature measurement on-line probe 333a, spare temperature probe 333b and temperature judge mould
Block 41；All 6 temperature probes draw the pusher side junction box for being wired to outside motor inside motor, and wherein temperature measurement on-line is visited
Head 331a, temperature measurement on-line probe 332a, temperature measurement on-line probe 333a and temperature judgment module 41 are electrically connected；Temperature judgment module
41 receive threephase stator temperature signal, are judged to motor threephase stator temperature conditions, and will determine that result is transmitted to jump vehicle
Control unit；
Oil inlet flow cell includes load side oil inlet flow switch 311, anti-load side oil inlet flow switch 312, load side
Bearing temperature signal 361, anti-load side bearing temperature signal 362 and load side are into oil stream amount judgment module 45, anti-load side
Into oil stream amount judgment module 46；Load side receives load side oil inlet flow switch 311 and load side into oil stream amount judgment module 45
361 two signals of bearing temperature signal are made motor load side oil inlet situation and are sentenced by the comprehensive analysis to the two signal
It is disconnected, and will determine that result is transmitted to and jump vehicle control unit；Anti- load side receives anti-load side oil inlet into oil stream amount judgment module 46
Flow switch 312 and anti-362 two signals of load side bearing temperature signal, by the comprehensive analysis to the two signal, to motor
Anti- load side oil inlet situation judges, and will determine that result is transmitted to and jump vehicle control unit；
It includes jumping vehicle judgment module 40, jumping vehicle execution module 50 to jump vehicle control unit, jumps vehicle judgment module 40 and receives rotating speed
Judgment module 44, load side vibration judgment module 42, anti-load side vibration judgment module 43, temperature judgment module 41, load side
Into oil stream amount judgment module 45 and anti-load side into the deterministic process signal of oil stream amount judgment module 46, and comprehensive all judged
Journey signal makes further judging result, and is transmitted to and jumps vehicle execution module 50, is sent out from jump vehicle execution module 50 to motor 30
Go out protection and jumps vehicle control signal.
In order to make electric panel room common ground from the interference of irregular interference source, signal interference risk is utmostly reduced,
The signal ground line 345 of rotating speed unit is located at scene, i.e., the probe wire of rotational speed probe 341 leads to pusher side inside motor 30 and connects
It is grounded after line case 343, to be detached from electric panel room common ground.
6 temperature probes in threephase stator temperature unit select thermal resistance, using the four-wire system mode of connection, from motor
Draw the pusher side junction box for being wired to outside motor in 30 inside；Any judges mould with temperature in wherein 3 temperature measurement on-line probes
Block 41 is all made of three-wire system connection when being electrically connected, i.e., its privates is spare, in any wire break in having connect three lines, with the
Four conducting wires substitute fault wire, the fast normal thermometric of quick-recovery；Any when breaking down in 3 temperature measurement on-lines are popped one's head in, switching
Connect corresponding spare temperature probe, the fast normal thermometric of quick-recovery.
Flow switch in oil inlet flow cell is made of sliding block of the inside with spring and external magnetic switch, structure letter
Easily, it is easily installed maintenance, and of low cost.
Jump vehicle judgment module 40, jump vehicle execution module 50 and rotating speed judgment module 44, load side vibration judgment module 42,
Anti- load side vibration judgment module 43, temperature judgment module 41, load side are into oil stream amount judgment module 45 and anti-load side oil inlet
Flow judgment module 46 is dcs.
In conjunction with flow chart 6, a kind of air compressor motor jumps the control method of vehicle protection system, includes the following steps：
S1, start air compressor motor, driving air compressor machine operating：After air compressor machine load, motor is made to reach synchronous with air compressor machine,
And normal operation input, convey process after compressed air to oxygenerator；
S2, rotating speed jump vehicle protection：When air compressor machine normal operation, rotating speed should be a relative constant value；
S2.1, increase delay function in rotating speed judgment module, when tach signal is fluctuated in fast peak and touches jump vehicle
Value, but the signal perdurabgility be less than preset delay value when, then be judged as external signal interference rather than motor speed it is really different
Often, it is filtered and is noted down, be simultaneously emitted by alarm signal, it is abnormal to inform that staff's rotating speed unit exists；
S2.2, rotating speed abnormal signal are interlocked with 30 electric current of motor again, and when load increase or motor desynchronizing, rotating speed just can be true
It is real to reduce, and both of which will cause electric current to increase, when rotating speed abnormal signal is more than delay, and motor in the unit interval
30 curent changes are more than preset value, then it is assumed that rotating speed really reduces, i.e. vehicle is jumped in triggering interlocking, the protection of motor 30, is otherwise only sent out
Alarm signal is without jumping vehicle；
S3, threephase stator temperature jump vehicle protection：Motor threephase stator temperature, which really rises, is required to a period of time, will not dash forward
Become；Threephase stator coil is intertwined in structure, and when a wherein phase temperature anomaly, remaining two-phase temperature also can be in difference
Degree rises；
S3.1, when any phase heat alarm and when jumping vehicle signal while occurring, it is judged as wiring open circuit or thermal resistance
Failure itself, does not jump vehicle, only sends out alarm；When only having a phase temperature display exception in three-phase temperature, it is judged as poor contact
Or thermal resistance failure itself, vehicle is not jumped, alarm is only sent out；
S3.2, it first alarms when wherein two-phase or three-phase temperature, it is synchronous after a period of time to rise, there is a phase to arrive
Up to jump vehicle value, then it is assumed that be true temperature height performance, that is, send out and jump vehicle signal；
S3.3 connects when the thermal resistance of Faulty Temperature in three lines, when only 1 wire break, is then opened in pusher side junction box
With privates, new three-wire system, the transmission of recovery temperature signal are constituted；When the thermal resistance of Faulty Temperature connects in three lines, there are 2
Or when 3 line open circuits, then spare thermal resistance is enabled in pusher side junction box, substitute failure thermal resistance；
S4, vibration jump vehicle protection：When machine shaft vibration is true abnormal high, the vibration variable quantity of shaft should be in axial direction
It is moved from X into the plane quadrant constituted with Y-direction on section, i.e. X is to when variation, and Y-direction also changes, and vice versa；
S4.1, cancel the extremely high jump vehicle interlocking of single vibration values in vibrating judgment module but retain warning function, and increase
Add the difference operation with a pair of of vibration signal；
S4.2, when in vibration, single vibration values are extremely high but another vibration values are normal, and the difference operation of the two
As a result when larger, then the high vibration of the exception sends out alarm, and difference operation also sends out alarm, but does not jump vehicle, reminds work at this time
Make that the vibration of personnel's machine shaft is not genuine abnormal high, but there are monomer failures for the high vibration detection device of the single exception；
S4.3, when with to X it is abnormal high to 2 vibrations of, Y-direction, and difference operation result is smaller, that is, is less than preset value
When, show that motor shaft vibration is genuine abnormal high, then triggers interlocking, air compressor motor protection is enabled to jump vehicle；
S5, vehicle protection is jumped into oil stream amount：It is the indirect protection of bearing bush temperature height protection into oil stream amount minimum living protective function, once
Into oil stream amount really down to a certain degree, bearing bush temperature can accordingly rise, such as really low into oil stream amount, then can lead to bearing bush temperature
It is true high；
S5.1, flow is low directly to jump vehicle interlocking but retains warning function into cancelling in oil stream amount judgment module, and will be into
Oil stream amount is switched to be interlocked with corresponding homonymy motor bearing temperature；
S5.2 is acted when into oil stream amount low switch, but homonymy bearing bush temperature does not change, then is judged as flow switch itself
Failure only sends out alarm signal, when homonymy bearing bush temperature also rises simultaneously, and reaches preset value, then triggers interlocking and jumps vehicle.
Air compressor motor of the present invention jumps vehicle protection system and its control method, and speed detector failure itself is avoided to cause
Vehicle is jumped in air compressor motor malfunction, and tach signal ground connection is more reasonable, utmostly reduces the wind interfered by other electric signals
Danger；Single temperature probe failure itself or the bad initiation air compressor motor malfunction of wiring in threephase stator temperature is avoided to jump
Vehicle, and provide and maintain under air compressor machine normal operating conditions, the method for the fast normal thermometric of quick-recovery；Avoid single vibration detection
Device failure itself causes air compressor motor malfunction and jumps vehicle, and provides and judge that the high failure of abnormal vibration is derived from detection dress actually
Set failure itself or the true abnormal reference frame of motor oscillating；Oil inlet flow switch failure itself is avoided to cause pneumatics electromechanical
Vehicle is jumped in chance error action, and retains warning function, convenient for noting abnormalities and handling in time.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (6)
1. a kind of air compressor motor jumps vehicle and protects system, it is characterised in that：Including air compressor machine (10), gearbox (20), motor
(30), rotating speed unit, vibration unit, threephase stator temperature unit, oil inlet flow cell, jump vehicle control unit；
The motor (30) connects air compressor machine (10) by gearbox (20), and motor (30), which is powered, operates driving air compressor machine (10) fortune
Turn, raw air is pressurized and is exported by air compressor machine (10)；
The rotating speed unit includes rotational speed probe (341), pusher side junction box (343), speed changer (342), current of electric letter
Number (35) and rotating speed judgment module (44), rotational speed probe (341) are installed on motor (30) anti-load side, pass through pusher side junction box
(343) it after connection, transition, is electrically connected with speed changer (342) in the electric panel room of a distant place, rotational speed output signal and current of electric
(35) signal is electrically connected with rotating speed judgment module (44) together；Rotating speed judgment module (44) passes through the synthesis point to the two signal
Analysis, judges motor speed situation, and will determine that result is transmitted to and jump vehicle control unit；
The vibration unit includes the 1st group of vibration detection device of vibration probe (321), vibratory converter (323) composition, vibration
It pops one's head in (322), the 2nd group of vibration detection device of vibratory converter (324) composition, vibration probe (325), vibratory converter
(327) the 3rd group of vibration detection device formed, the 4th group of vibration detection that vibration probe (326), vibratory converter (328) form
Device and load side vibration judgment module (42), anti-load side vibration judgment module (43)；1st group and the 2nd group of vibration detection
Device is the 1st pair, and common detection load side vibration, the 3rd group and the 4th group is the 2nd pair, detects anti-load side vibration jointly；It is each pair of
Vibration is all in 90 ° two-by-two, and respectively with level in left 45 °, right 45 ° of installations, is referred to as X to, Y-direction, joint characterization shaft exists
Vibration variable quantity in one plane quadrant；Load side vibrates judgment module (42) and anti-load side vibration judgment module (43),
Corresponding vibration detection signal is received respectively, motor oscillating detection case is judged, and will determine that result is transmitted to jump vehicle
Control unit；
The threephase stator temperature unit includes R phase temperature measurement on-lines probe (331a), spare temperature probe (331b), and S phases are online
Temperature probe (332a), spare temperature probe (332b), T-phase temperature measurement on-line probe (333a), spare temperature probe (333b), with
And temperature judgment module (41)；All 6 temperature probes draw the pusher side junction box for being wired to outside motor inside motor,
Wherein temperature measurement on-line probe (331a), temperature measurement on-line probe (332a), temperature measurement on-line probe (333a) and temperature judgment module
(41) it is electrically connected；Temperature judgment module (41) receives threephase stator temperature signal, is made to motor threephase stator temperature conditions
Judge, and will determine that result is transmitted to and jump vehicle control unit；
The oil inlet flow cell includes load side oil inlet flow switch (311), anti-load side oil inlet flow switch (312), is born
Lotus side bearing temperature signal (361), anti-load side bearing temperature signal (362) and load side are into oil stream amount judgment module
(45), anti-load side is into oil stream amount judgment module (46)；Load side receives load side into oil stream into oil stream amount judgment module (45)
Amount switch (311) and (361) two signals of load side bearing temperature signal, by the comprehensive analysis to the two signal, to motor
Load side oil inlet situation judges, and will determine that result is transmitted to and jump vehicle control unit；Anti- load side judges mould into oil stream amount
Block (46) receives (362) two signals of anti-load side oil inlet flow switch (312) and anti-load side bearing temperature signal, by right
The comprehensive analysis of the two signal judges the anti-load side oil inlet situation of motor, and will determine that result is transmitted to and jump vehicle control
Unit；
The jump vehicle control unit includes jumping vehicle judgment module (40), jumping vehicle execution module (50), jumps vehicle judgment module (40) and connects
It receives rotating speed judgment module (44), load side vibration judgment module (42), anti-load side vibration judgment module (43), temperature and judges mould
Block (41), load side are believed into oil stream amount judgment module (45) and anti-load side into the deterministic process of oil stream amount judgment module (46)
Number, and comprehensive all deterministic process signals, further judging result is made, and be transmitted to and jump vehicle execution module (50), by jumping
Vehicle execution module (50) sends out protection to motor (30) and jumps vehicle control signal.
2. a kind of air compressor motor described in accordance with the claim 1 jumps vehicle and protects system, it is characterised in that：The rotating speed unit
Signal ground line (345) is located at scene, and the probe wire of rotational speed probe (341) leads to pusher side junction box inside motor (30)
(343) it is grounded afterwards.
3. a kind of air compressor motor described in accordance with the claim 1 jumps vehicle and protects system, it is characterised in that：The threephase stator temperature
6 temperature probes spent in unit select thermal resistance, and using the four-wire system mode of connection, electricity is wired to from internal draw of motor (30)
Pusher side junction box outside machine；It is adopted when any is electrically connected with temperature judgment module (41) in wherein 3 temperature measurement on-line probes
With three-wire system connection.
4. a kind of air compressor motor described in accordance with the claim 1 jumps vehicle and protects system, it is characterised in that：It is described into oil stream amount list
Flow switch in member is made of sliding block of the inside with spring and external magnetic switch.
5. a kind of air compressor motor described in accordance with the claim 1 jumps vehicle and protects system, it is characterised in that：The jump vehicle judges mould
Block (40), jump vehicle execution module (50) and rotating speed judgment module (44), load side vibration judgment module (42), anti-load side are shaken
Dynamic judgment module (43), temperature judgment module (41), load side are into oil stream amount judgment module (45) and anti-load side into oil stream amount
Judgment module (46) is dcs.
6. a kind of air compressor motor described in accordance with the claim 1 jumps the control method of vehicle protection system, which is characterized in that including
Following steps：
S1, start air compressor motor, driving air compressor machine operating：After air compressor machine load, motor is set to reach synchronous with air compressor machine, and throw
Enter normal operation, conveys process after compressed air to oxygenerator；
S2, rotating speed jump vehicle protection：When air compressor machine normal operation, rotating speed should be a relative constant value；
S2.1, increase delay function in rotating speed judgment module, vehicle value is jumped when tach signal is fluctuated and touched in fast peak, but
When the signal perdurabgility is less than preset delay value, then it is judged as that external signal interference rather than motor speed are really abnormal, it will
It filters and notes down, and is simultaneously emitted by alarm signal, and it is abnormal to inform that staff's rotating speed unit exists；
S2.2, rotating speed abnormal signal are interlocked with motor (30) electric current again, and when load increase or motor desynchronizing, rotating speed just can be true
It reduces, and both of which will cause electric current to increase, when rotating speed abnormal signal is more than to be delayed, and motor is electric in the unit interval
Rheologyization is more than preset value, then it is assumed that rotating speed really reduces, i.e. triggering interlocking, electric motor protecting jumps vehicle, otherwise only sends out alarm signal
Number without jump vehicle；
S3, threephase stator temperature jump vehicle protection：Motor threephase stator temperature, which really rises, is required to a period of time, will not be mutated；
Threephase stator coil is intertwined in structure, and when a wherein phase temperature anomaly, remaining two-phase temperature also can be in different journeys
Degree rises；
S3.1, when any phase heat alarm and when jumping vehicle signal while occurring, it is judged as wiring open circuit or thermal resistance itself
Failure, does not jump vehicle, only sends out alarm；When only having a phase temperature display exception in three-phase temperature, it is judged as poor contact or heat
Resistance failure itself, does not jump vehicle, only sends out alarm；
S3.2, it first alarms when wherein two-phase or three-phase temperature, it is synchronous after a period of time to rise, there is a phase to reach and jumps
Vehicle value, then it is assumed that be true temperature height performance, that is, send out and jump vehicle signal；
S3.3 connects when the thermal resistance of Faulty Temperature in three lines, when only 1 wire break, then the is enabled in pusher side junction box
Four conducting wires constitute new three-wire system, the transmission of recovery temperature signal；When the thermal resistance of Faulty Temperature connects in three lines, there are 2 or 3
When root line open circuit, then spare thermal resistance is enabled in pusher side junction box, substitute failure thermal resistance；
S4, vibration jump vehicle protection：When machine shaft vibration is true abnormal high, the vibration variable quantity of shaft should be in axial cross section
On moved from X into the plane quadrant constituted with Y-direction, i.e. X to variation when, Y-direction also changes, and vice versa；
S4.1, cancel the extremely high jump vehicle interlocking of single vibration values in vibrating judgment module but retain warning function, and increase same
The difference operation of a pair of of vibration signal；
S4.2, when in vibration, single vibration values are extremely high but another vibration values are normal, and the difference operation result of the two
When larger, then the high vibration of the exception sends out alarm, and difference operation also sends out alarm, but does not jump vehicle, reminds work people at this time
Member's machine shaft vibration is not genuine abnormal high, but there are monomer failures for the high vibration detection device of the single exception；
S4.3, when with to X it is abnormal high to 2 vibrations of, Y-direction, and difference operation result is smaller, that is, when being less than preset value, table
Bright motor shaft vibration is genuine abnormal high, then triggers interlocking, and air compressor motor protection is enabled to jump vehicle；
S5, vehicle protection is jumped into oil stream amount：It is the indirect protection of bearing bush temperature height protection into oil stream amount minimum living protective function, once oil inlet
Really down to a certain degree, bearing bush temperature can accordingly rise flow, such as really low into oil stream amount, then bearing bush temperature can be caused true
It is high；
S5.1, vehicle interlocking but reservation warning function are directly being jumped into cancellation flow in oil stream amount judgment module is low, and will be into oil stream
Amount switch is interlocked with corresponding homonymy motor bearing temperature；
S5.2 is acted when into oil stream amount low switch, but homonymy bearing bush temperature does not change, then is judged as flow switch failure itself,
Alarm signal is only sent out, when homonymy bearing bush temperature also rises simultaneously, and reaches preset value, then interlocking is triggered and jumps vehicle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112611037A (en) * | 2020-12-10 | 2021-04-06 | 青岛海信日立空调系统有限公司 | Air conditioner and single-phase motor fault judgment method for air conditioner |
| CN113608494A (en) * | 2021-08-06 | 2021-11-05 | 靳亚铭 | Interlock control method and device and safety instrument system |
| CN114489172A (en) * | 2020-11-12 | 2022-05-13 | 山西潞安煤基清洁能源有限责任公司 | Temperature interlocking judgment method, system and equipment |
| CN115523173A (en) * | 2022-09-23 | 2022-12-27 | 阳春新钢铁有限责任公司 | A simple control method for interlocking temperature of running fan with filtering and decoupling protection |
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| CN114489172A (en) * | 2020-11-12 | 2022-05-13 | 山西潞安煤基清洁能源有限责任公司 | Temperature interlocking judgment method, system and equipment |
| CN112611037A (en) * | 2020-12-10 | 2021-04-06 | 青岛海信日立空调系统有限公司 | Air conditioner and single-phase motor fault judgment method for air conditioner |
| CN112611037B (en) * | 2020-12-10 | 2023-11-03 | 青岛海信日立空调系统有限公司 | Air conditioner and fault judging method for single-phase motor for air conditioner |
| CN113608494A (en) * | 2021-08-06 | 2021-11-05 | 靳亚铭 | Interlock control method and device and safety instrument system |
| CN115523173A (en) * | 2022-09-23 | 2022-12-27 | 阳春新钢铁有限责任公司 | A simple control method for interlocking temperature of running fan with filtering and decoupling protection |
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