CN204783229U - Stepless speed control controlling means and electromagnetic fan clutch - Google Patents

Abstract

The utility model provides a stepless speed control controlling means and electromagnetic fan clutch, the linear motor mover comprises an iron core, solenoid, the main shaft, the drive plate, the fan fixed disk, first bearing, the second bearing, the power output shaft of engine passes through driving belt and connects the belt pulley, the main shaft passes the belt pulley center, with belt pulley fixed connection, a belt pulley, the fan fixed disk, the drive plate, iron core and main shaft coaxial line, the fan fixed disk is through the first bearing and main shaft fixed connection at center, the iron core is through the second bearing and main shaft fixed connection at center, the center of drive plate is passed through the keyway and is connected with the spline fit of main shaft, the drive plate can be followed the spline and done endwise slip, the actuation face of drive plate and the actuation facial features of fan fixed disk neighbour, the inner chamber bottom of fan fixed disk is adjacent with the inner chamber open end of iron core, fixed mounting has solenoid in the inner chamber of iron core, fan leaf fixed connection is on the external circumferential wall of fan fixed disk, the utility model discloses the engine that can make the in operation can remain throughout in normal operating mode temperature.

Description

Stepless speed regulation controller and electromagnetic fan clutch

Technical field

The utility model relates to a kind of signal control device, particularly relates to a kind of control gear for electromagnetic fan clutch.

Background technique

Electromagnetic fan clutch is widely used in the cooling of motor car engine, if application number is " CN201210007482.4 ", " CN201110404225.X ", electromagnetic fan clutch described in the patent document of " CN201010500032.X ", wherein main structure comprises electromagnetic coil, as the drive plate of driving disc, as the fan fixed disk of driven disc, fan fixed disk is provided with the adhesive dish that can move radially along transmission shaft, motor drives drive axis by belt pulley, the drive plate be fixedly connected with transmission shaft is with drive axis, when engine temperature reaches high setting value, solenoid controlled loop is energized, electromagnetic coil generates an electromagnetic field, attract the adhesive dish in fan fixed disk and drive plate adhesive, rotate with drive plate, drive fan fixed disk and on fan leaf rotate, motor is lowered the temperature.When engine temperature drops to low setting value, the power-off of solenoid controlled loop, electromagnetic field disappears, and the adhesive dish in fan fixed disk is separated with drive plate, and fan fixed disk stops operating, and fan leaf stops cooling.To the monitoring of engine temperature, the break-make in electromagnetic coil loop, completed by the temperature detect switch (TDS) in electromagnetic coil loop.Because structure space is limited, even if utilize magnetic eddy-current technique, magnet fixed disc is set, forms fan fixed disk flexible connecting transmission dish, form differential and rotate, coordinate different temperature detect switch (TDS), fan leaf also can only be made to rotate with 2 to 3 different rotating speeds.

By the limited sensor switching value that temperature detect switch (TDS) provides, control electromagnetic coil break-make, make the response accuracy of the opportunity of fan start and stop and engine temperature dynamic change very low, the response of fan action to temperature variation has obviously delayed, causes engine operating condition unstable.Owing to rotating at full speed with drive plate after fan fixed disk adhesive, fan can not be driven to carry out Homogeneouslly-radiating cooling along with the change of engine operating temperature, make in radiating and cooling process, there is waste in the output power of motor.Existing fan cooling cooling control mode, causes the operational temperature curve of motor to be irregular flexuose, the normal working temperature of motor cannot be maintained.

By comprising the electronic control unit be connected with temperature transducer and signals of rotational speed sensor respectively by signal input port, the signal output port of electronic control unit is by switching circuit access solenoid controlled loop, existing singlechip technology completely likely completes the complicated calculations of various Received signal strength, realize the generation of control signal, but how sensor and signal input and output circuit structure are set, overcome the signal excitation of electromagnetic interference and other forceful electric power circuit, be connected with the reasonable mechanical structure of electromagnetic fan clutch, realizing stepless speed regulation control strategy is the technical problem needing to overcome.

Model utility content

The purpose of this utility model is to provide a kind of stepless speed regulation controller realizing the stepless speed regulation control strategy of electromagnetic fan clutch, realizes when motor runs, and maintains the normal working temperature of motor.

Another object of the present utility model is to provide the electromagnetic fan clutch applying above-mentioned control gear, solves electromagnetic fan clutch waste motive power, and can not the technical problem of stable maintenance engine operating condition temperature.

An electromagnetic fan clutch for stepless speed regulation controller, comprises iron core, electromagnetic coil, main shaft, drive plate, fan fixed disk, clutch shaft bearing, the second bearing,

The pto＝power take-off of motor connects belt pulley by drivign belt, main shaft is through pulley centers, be fixedly connected with belt pulley, belt pulley, fan fixed disk, drive plate, iron core and main shaft coaxial line, fan fixed disk is fixedly connected with main shaft by the clutch shaft bearing at center, and iron core is fixedly connected with main shaft by second bearing at center, and the center of drive plate is connected with the spline fitted of main shaft by keyway, drive plate can be in axial sliding along spline

The adhesive face of drive plate is adjacent with the adhesive face of fan fixed disk, and the intracavity bottom of fan fixed disk is adjacent with the lumen openings end of iron core, and be installed with electromagnetic coil in the inner chamber of iron core, fan leaf is fixedly connected on the outer circle wall of fan fixed disk,

The adhesive face of drive plate is with on the adhesive face of fan fixed disk, and correspondence is provided with friction plate,

On the outer wall of iron core, the position corresponding with fan fixed disk is provided with speed probe,

Electronic control unit and switching circuit, integrated operational amplifier circuit are on circuit boards integrated, and be arranged in operator cabin, the wire guide of signaling line on iron core of speed probe connects electronic control unit.Cooling-water temperature sensor is arranged on engine water cycle subsystem heat radiation position, oil temperature sensor is arranged on engine oil cycle subsystem heat radiation position, air-temperature sensor is arranged on engine air cycle subsystem heat radiation position, and the signaling line of each temperature transducer is connected with integrated operational amplifier circuit.The wire guide access solenoid controlled loop of signaling line on iron core at electromagnetic coil two ends.Switching circuit is also by signaling line access solenoid controlled loop.

Stepless speed regulation controller of the present utility model, comprise the electronic control unit be connected with temperature transducer and signals of rotational speed sensor respectively by signal input port, the signal output port of electronic control unit is by switching circuit access solenoid controlled loop, comprise the first temperature transducer, second temperature transducer and three-temperature sensor, also comprise the first power amplifier adopting operational amplifier, second power amplifier, 3rd power amplifier and the 4th power amplifier, an input end of the first power amplifier connects the first temperature transducer, another input end connects reference signal vset1, an input end of the second power amplifier connects the second temperature transducer, another input end connects reference signal vset2, an input end of the 3rd power amplifier connects three-temperature sensor, another input end connects reference signal vset3, first power amplifier, the second power amplifier are connected an input end of the 4th power amplifier with the output terminal of the 3rd power amplifier, another input end of the 4th power amplifier connects reference signal vset4, and the output terminal of the 4th power amplifier connects the signal input port of electronic control unit.

The pin 4 of integrated operational amplifier circuit connects working power vcc, pin 11 ground connection, and pin 3 connects reference signal vset1, and pin 5 connects reference signal vset2, and pin 10 connects reference signal vset3, and pin 12 connects reference signal vset4;

Connect pin 2 after working power vcc series resistors r1, after working power vcc series resistors r2, connect pin 6, after working power vcc series resistors r3, connect pin 9;

Connect pin 2 after the signal output part series resistors r5 of the first temperature transducer, connect pin 6 after the signal output part series resistors r7 of the second temperature transducer, after the signal output part series resistors r9 of three-temperature sensor, connect pin 9;

Contact resistance r4 between pin 1 and pin 2, contact resistance r6 between pin 6 and pin 7, contact resistance r8 between pin 8 and pin 9, contact resistance r13 between pin 13 and pin 14;

Pin 1 connects pin 13 after series resistors r10, and pin 7 connects pin 13 after series resistors r11, and pin 8 connects pin 13 after series resistors r12, and pin 14 connects the signal input port of electronic control unit.

Stepless speed regulation controller of the present utility model, can the driven disc rotating speed of accurate adjustment electromagnetic fan clutch, and make it the operating condition meeting motor, accurate responding engine is from the static radiating requirements running each stage to the limit.Abundant cooperation electromagnetic fan clutch stepless speed regulation control strategy.

Electromagnetic fan clutch of the present utility model, temperature when can realize low engine speed operating mode fast keeps, and realizes a large amount of heat radiations during high engine speeds operating mode fast, reduces engine power waste, improves electromagnetic fan clutch working life.

Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.

Accompanying drawing explanation

Fig. 1 is the control flow chart of the utility model electromagnetic fan clutch stepless speed regulation control strategy;

Fig. 2 is the controlling curve schematic diagram that the utility model electromagnetic fan clutch stepless speed regulation control strategy is formed;

Fig. 3 is the principle schematic of the stepless speed regulation controller realizing the utility model stepless speed regulation control strategy;

Fig. 4 is the integrated operational amplifier circuit principle schematic of stepless speed regulation controller signals collecting part of the present utility model;

Fig. 5 is a kind of concrete structure schematic diagram of integrated operational amplifier circuit of stepless speed regulation controller signals collecting part of the present utility model;

Fig. 6 is the structural representation of a kind of electromagnetic fan clutch utilizing stepless speed regulation controller of the present utility model.

Embodiment

The temperature variation when fan driven to make electromagnetic fan clutch can run with motor dynamically changes rotating speed, ensure operating temperature during motor nominal situation, complete corresponding engine radiating amount and smoothly adjust rotation speed of the fan, realize electromagnetic fan clutch stepless speed regulation, control strategy of the present utility model applies electronic signature capture feedback and pwm signal pulse width modulating technology.

Realize stepless speed regulation mainly through following steps to control:

Step 1, water temperature, temperature and oil temperature signal on set temperature sensor Real-time Collection cycle of engine pipeline, the tach signal of speed probe Real-time Collection electromagnetic fan clutch driven disc is set, electronic control unit receives combined temp signal formation temperature variation tendency data, and electronic control unit receives tach signal and forms the instant output power data of electromagnetic fan clutch;

The pulse signal dutycycle that step 2, electronic control unit export according to temperature changing trend data point reuse and change in duty cycle speed, form the pulse control signal of electromagnetic fan clutch driving disc and driven disc adhesive/be separated;

Step 3, switching circuit or signal amplification circuit are set, make pulse control signal form drive singal, drive the solenoid controlled loop break-make of electromagnetic fan clutch;

Step 4, the driving disc of electromagnetic fan clutch and driven disc, according to the temperature changing trend adhesive of cycle of engine pipeline/be separated, transmit corresponding output power and drive fan for cooling.

As shown in Figure 1, the concrete rate-determining steps of electromagnetic fan clutch stepless speed regulation control strategy of the present utility model is as follows:

Step s01, ato unit, electronic control unit;

Step s02, utilizes temperature signal during temperature transducer collection engine operation;

Step s03, electronic control unit judges temperature signal variation tendency;

Step s04, performs step s10 when temperature is raised;

Step s10, when temperature trend steepening, when namely temperature rate-of-rise becomes large, performs step s11, when temperature trend slows down, when namely temperature rate-of-rise diminishes, performs step s12;

Step s11, electronic control unit adjustment controls the pulse signal of solenoid controlled loop break-make, and pulse is broadened, namely dutycycle becomes large (change between 0% to 100%, being 100% when motor full-speed operation, is 0 when the engine operates with a low speed), then perform step s13;

Step s12, electronic control unit adjustment controls the pulse signal of solenoid controlled loop break-make, makes pulse narrowing, namely dutycycle diminish (between 0% to 100% change, being 100% when motor full-speed operation, is 0 when the engine operates with a low speed), then perform step s13;

Step s13, electronic control unit output pulse signal;

Step s14, pulse signal controls solenoid controlled loop and connects;

Step s15, electromagnetic coil generates an electromagnetic field and makes driving disc and driven disc adhesive;

Step s16, driven disc drives fan to accelerate to rotate;

Step s17, the tach signal of electromagnetic fan clutch driven disc when utilizing velocity transducer to gather engine operation;

Step s18, electronic control unit judges driven disc rotating speed, temperature signal and clutch state;

Step s19, when rotating speed does not reach high setting value, jumps to step s02, and when rotating speed reaches high setting value, perform step s20, rotating speed high setting value is 3000rpm herein;

Step s20, jump to step s02 when high setting value rotating speed does not reach the setting endurance, when high setting value rotating speed reaches the setting endurance, perform step s28, the endurance is 3min herein;

Step s28, electronic control unit sends guard sign, jumps to step s02;

Step s21, when temperature reaches high setting value, jumps to step s28, and when temperature does not reach high setting value, perform step s22, temperature high setting value is 90 degrees Celsius herein;

Step s22, when pulse signal dutycycle is not maximum (when dutycycle is not 1), jumps to step s02, when pulse signal dutycycle is maximum, performs step s23;

Step s23, when driven disc rotating speed is lower than limit value, perform step s28, when driven disc rotating speed is higher than limit value, jump to step s02, limit value is herein 1500rpm.

Step s04, performs step s30 upon a drop in temperature;

Step s30, when temperature trend steepening, when namely temperature changing speed becomes large, performs step s31, when temperature trend slows down, when namely temperature changing speed diminishes, performs step s32;

Step s31, electronic control unit adjustment controls the pulse signal of solenoid controlled loop break-make, makes pulse narrowing, and namely dutycycle diminishes (changing between 0 to 1), then performs step s33;

Step s32, electronic control unit adjustment controls the pulse signal of solenoid controlled loop break-make, and pulse is broadened, and namely dutycycle becomes large, then performs step s33;

Step s33, electronic control unit output pulse signal;

Step s34, pulse signal controls solenoid controlled loop and disconnects;

Step s35, electromagnetic coil eliminates electromagnetic field makes driving disc be separated with driven disc;

Step s36, fan is with driven disc underdrive;

Step s37, the tach signal of electromagnetic fan clutch driven disc when utilizing velocity transducer to gather engine operation;

Step s38, electronic control unit judges driven disc rotating speed, temperature signal and clutch state; ;

Step s39, when rotating speed does not reach minimum, jumps to step s02, and when rotating speed reaches minimum, perform step s40, rotating speed minimum is 500rpm herein;

Step s40, jumps to step s02 when minimum speed does not reach the setting endurance, when minimum speed reaches the setting endurance, performs step s28;

Step s28, electronic control unit sends guard sign and jumps to step s02;

Step 41, when temperature reaches low setting value, jumps to step s28, and when temperature does not reach low setting value, perform step s42, the low setting value of temperature is 80 degrees Celsius herein;

Step s42, when pulse signal dutycycle is not minimum (when dutycycle is not equal to 0), jumps to step s02, when pulse signal dutycycle is minimum, performs step s43;

Step s43, when driven disc rotating speed is higher than limit value, perform step s28, when driven disc rotating speed is lower than limit value, jump to step s02, rotating speed height limit value is 2500rpm herein.

Electromagnetic fan clutch stepless speed regulation control strategy of the present utility model utilizes PWM technology, by changing the pulse signal width that electronic control unit exports, adjustment pwm signal dutycycle, the effective rotative power of the driven disc in the dynamic conditioning unit time, fully effectively utilizes engine power.When making motor full-speed operation, pwm signal dutycycle is 100%, makes the adhesive always of driving disc and driven disc, and driven disc drives fan to reach maximum (top) speed, and motor can fully dispel the heat.When making time of engine low speed, pwm signal dutycycle is 0, and driving disc is separated with driven disc always, and under inertia and frictional force effect, driven disc drives fan with very slow-speed of revolution operation.Change the pwm signal dutycycle of electronic control unit output according to the heat radiation trend of motor, driven disc is dispelled the heat according to engine radiating state dynamic conditioning rotating speed.When driving disc rotating speed is constant, dutycycle increases, and rotation speed of the fan improves; Dutycycle reduces, and rotation speed of the fan reduces, and can not waste engine power, make the operating temperature of motor remain at optimum condition.The dutycycle of pulse signal in this strategy, namely within the unit time pulse broaden or the ratio (or speed, or trend) that narrows closely related with the trend of temperature variation.

Combined temp signal formation temperature variation tendency data, are heat conduction setting parameter first weighted values according to described subtense angle medium fluid, are formed in the temperature value complex superposition of same time point, form the temperature changing trend data in endurance section.

The flows per unit time also comprising described subtense angle medium fluid sets the second weighted value, is formed in the temperature value complex superposition of same time point, forms the temperature changing trend data in endurance section.

In step s02, by different temperature transducers, the temperature variation signal in motor different sub-systems can be gathered, comprises the water temperature signal in motor, oil temperature signal, air temperature signal etc.

Electronic control unit includes the preset control logic program to data, by processing polytype temperature variation signal, control wave can be generated better, adjustment pulse signal width and amplitude, make the adjustment of rotational speed process of fan more consistent with engine radiating process, save engine efficiency.

Also can following steps be reduced to, to realize the simplest deterministic process for the signal Rule of judgment after step s18:

When temperature reaches high setting value, directly perform step s28;

When temperature reach there is no high setting value and pulse duty factor not lower than limit value time, jump to step s02;

When temperature reach there is no high setting value and pulse duty factor lower than limit value time, perform step s28.

Utilize electromagnetic fan clutch stepless speed regulation control strategy of the present utility model, temperature variation when the timely responding engine of rotation speed of the fan can be made to run, form a level and smooth rotation speed of the fan response curve, heat when making fan distribute engine running in time.

As shown in Figure 2, at engine start, driven disc, due to the pivot friction power between main shaft, keeps the very slow-speed of revolution to rotate, when starting to heat up, electronic control unit is according to temperature signal variation tendency, the control wave width that adjustment generates, progressively improves the control wave width in the unit time according to the heating temperature of motor, improve the ON time in solenoid controlled loop, improve the active power of driven disc, promote rotation speed of the fan and dispel the heat;

Along with motor is tending towards full speed running, heat radiation accelerated by motor, temperature improves further, electronic control unit dynamically improves the control wave width in the unit time, improve the ON time in solenoid controlled loop, improve the active power of driven disc, improve rotation speed of the fan, accelerate heat radiation further;

Until fan reaches maximum (top) speed, be tending towards consistent with engine speed, in the process electronic control unit gather all the time driven disc rotating speed, ensure the nominal situation of electromagnetic fan clutch, after rotation speed of the fan maintains restriction high-order rotating speed a period of time, when the temperature signal of electronic control unit collection shows that radiating effect no longer can maintain, electronic control unit sends guard sign;

When motor slows down, heat dissipating capacity reduces, the temperature signal variation tendency of electronic control unit by gathering, the control wave width that adjustment generates, the control wave width in the unit time is progressively reduced according to the heating temperature of motor, reduce the ON time in solenoid controlled loop, reduce the active power of driven disc, reduce rotation speed of the fan and carry out efficiently radiates heat; Along with engine retard stops, engine temperature reduces further, electronic control unit dynamically reduces the control wave width in the unit time, improve the turn-off time in solenoid controlled loop, reduce the active power of driven disc, reduce rotation speed of the fan, slow down heat radiation further, driven disc by the pivot friction power between main shaft, can only be maintained the very slow-speed of revolution and rotates, until cool after engine cut-off.

Accelerate to hocket with deceleration in engine operation process, heat dissipating capacity dynamic change, rotation speed of the fan dynamically changes, and makes motor remain at optimum condition, the active power that driven disc obtains from driving disc is mated with heat dissipating capacity, makes engine power reach maximum saving.

Utilize the stepless speed regulation controller that electromagnetic fan clutch stepless speed regulation control strategy of the present utility model realizes, in conjunction with electronic signature capture feedback and pwm signal pulse width modulating technology, can control effectively to engine radiating, realize the stepless speed regulation of fan.

As shown in Figure 3, stepless speed regulation controller comprises electronic control unit 04, switching circuit 05, solenoid controlled loop 06, also comprises speed probe 07, first temperature transducer 01, second temperature transducer 02, three-temperature sensor 03,

Electronic control unit 04, the collection signal of receiving sensor, formation temperature variation tendency data, and according to initialize data and processing logic, generate the control wave corresponding with engine radiating amount, be sent to switching circuit 05;

Switching circuit 05, receives the control wave that electronic control unit 04 sends, and carries out power amplification, the switching signal of formation control solenoid controlled loop 06 break-make;

Solenoid controlled loop 06, the switching signal of receiving key circuit 05, makes electromagnetic coil generate or eliminates electromagnetic field;

Speed probe 07, gathers the Dynamic Speed signal of driven disc, is sent to electronic control unit 04;

First temperature transducer 01, gathers the dynamic water temperature signal in engine subsystems, is sent to electronic control unit 04;

Second temperature transducer 02, gathers the dynamic oil temperature signal in engine subsystems, is sent to electronic control unit 04;

Three-temperature sensor 03, gathers the dynamic air temperature signal in engine subsystems, is sent to electronic control unit 04;

Each sensor connects the signal input interface of electronic control unit 04, and the signal input interface of switching circuit 05 connects the signal output interface of electronic control unit 04, the signal output interface access solenoid controlled loop 06 of switching circuit 05.

Stepless speed regulation controller of the present utility model can realize above-mentioned stepless speed regulation control strategy, control electromagnetic coil generate in time or eliminate electromagnetic field, change the attracting state of driving disc and driven disc, control the active power of fan, and then realize the effective control to rotation speed of the fan.

Electronic control unit 04 adopts maturation, cheap single-chip microcomputer, as MCS51 Series MCU or ARM series CPU, can complete high accuracy data process, and reduce the overall manufacture cost of control gear.

Switching circuit 05, by the fast-acting relay comprised, or triode, or field effect transistor, control wave is formed switching signal, and switching circuit 05 is in output terminal access solenoid controlled loop 06, accept control wave at receiving terminal, complete amplification and the transmission of pulse control signal.According to the signal output interface driving force size of electronic control unit 04, switching circuit 05 can be omitted where necessary.

Utilize operational amplification circuit, gather the slight change of engine temperature signal, be beneficial to electronic control unit 04 and form temperature changing trend accurately, realization is used for the control wave in solenoid controlled loop to the response accurately and fast of temperature variation.

As shown in Figure 4, comprise the first power amplifier 71, second power amplifier the 72, three power amplifier the 73, four power amplifier 74,

First power amplifier 71, for accessing dynamic water temperature signal, and by signal amplification, filtering interfering;

Second power amplifier 72, for accessing dynamic oil temperature signal, and by signal amplification, filtering interfering;

3rd power amplifier 73, for accessing dynamic air temperature signal, and by signal amplification, filtering interfering;

4th power amplifier 74, for accessing each Dynamic Signal of amplification, amplifies, and synthesis combined temp signal sends electronic control unit 04;

An input end of the first power amplifier 71 connects the first temperature transducer 01, another input end connects reference signal vset1, an input end of the second power amplifier 72 connects the second temperature transducer 02, another input end connects reference signal vset2, an input end of the 3rd power amplifier 73 connects three-temperature sensor 03, and another input end connects reference signal vset3; First power amplifier 71, second power amplifier 72 is connected an input end of the 4th power amplifier 74 with the output terminal of the 3rd power amplifier 73, another input end of 4th power amplifier 74 connects reference signal vset4, and the output terminal of the 4th power amplifier 74 connects the signal input interface (port) of electronic control unit 04.

Each reference signal both may be used for demarcation signal benchmark, also may be used for demarcating this input end signal weighted value in the composite signal.

The temperature signal difference performance each sensor being gathered by operational amplification circuit clearly, makes electronic control unit 04 can receive trickle temperature contrast signal more accurately.

By using ripe integrated operational amplifier circuit as serial in LM324, can reduce the cost, improve the acquisition precision of temperature signal, reducing acquisition noise.

As shown in Figure 5, the pin 4 of integrated operational amplifier circuit 007 connects working power vcc, pin 11 ground connection, and pin 3 connects reference signal vset1, and pin 5 connects reference signal vset2, and pin 10 connects reference signal vset3, and pin 12 connects reference signal vset4;

Connect pin 2 after working power vcc series resistors r1, after working power vcc series resistors r2, connect pin 6, after working power vcc series resistors r3, connect pin 9;

Connect pin 2 after the signal output part series resistors r5 of the first temperature transducer 01, connect pin 6 after the signal output part series resistors r7 of the second temperature transducer 02, after the signal output part series resistors r9 of three-temperature sensor 03, connect pin 9;

Contact resistance r4 between pin 1 and pin 2, contact resistance r6 between pin 6 and pin 7, contact resistance r8 between pin 8 and pin 9, contact resistance r13 between pin 13 and pin 14;

Pin 1 connects pin 13 after series resistors r10, and pin 7 connects pin 13 after series resistors r11, and pin 8 connects pin 13 after series resistors r12, and pin 14 connects the signal input interface of electronic control unit 04.

Trickle temperature variation signal successful acquisition can be sent to electronic control unit 04 by the composite signal processed through integrated operational amplifier 007.

Comprise the electromagnetic fan clutch of stepless speed regulation controller of the present utility model, by the linkage structure of appropriate design electromagnetic fan clutch and stepless speed regulation controller, the radiating efficiency of existing electromagnetic fan clutch is significantly improved, ensures the nominal situation of motor simultaneously.

As shown in Figure 6, electromagnetic fan clutch comprises iron core 120, electromagnetic coil 118, main shaft 116, drive plate 110, fan fixed disk 108, clutch shaft bearing 114, second bearing 102,

The pto＝power take-off of motor connects belt pulley 100 by drivign belt, main shaft 116 is through belt pulley 100 center, be fixedly connected with belt pulley 100, belt pulley 100, fan fixed disk 108, drive plate 110, iron core 120 and main shaft 116 coaxial line, fan fixed disk 108 is fixedly connected with main shaft 116 by the clutch shaft bearing 114 at center, iron core 120 is fixedly connected with main shaft 116 by second bearing 102 at center, the center of drive plate 110 is connected by the spline fitted of keyway with main shaft 116, and drive plate 110 can be in axial sliding along spline.

The adhesive face of drive plate 110 is adjacent with the adhesive face of fan fixed disk 108, the intracavity bottom of fan fixed disk 108 is adjacent with the lumen openings end of iron core 120, be installed with electromagnetic coil 118 in the inner chamber of iron core 120, fan leaf 106 is fixedly connected on the outer circle wall of fan fixed disk 108.

The adhesive face of drive plate 110 is with on the adhesive face of fan fixed disk 108, and correspondence is provided with friction plate 112.

On the outer wall of iron core 120, the position corresponding with fan fixed disk 108 is provided with speed probe 104.

Electronic control unit and switching circuit, integrated operational amplifier circuit are on circuit boards integrated, and be arranged in operator cabin, the wire guide of signaling line on iron core 120 of speed probe 104 connects electronic control unit.Cooling-water temperature sensor is arranged on engine water cycle subsystem heat radiation position, oil temperature sensor is arranged on engine oil cycle subsystem heat radiation position, air-temperature sensor is arranged on engine air cycle subsystem heat radiation position, and the signaling line of each temperature transducer is connected with integrated operational amplifier circuit.The wire guide access solenoid controlled loop of signaling line on iron core 120 at electromagnetic coil 118 two ends.Switching circuit is also by signaling line access solenoid controlled loop.

Speed probe can adopt magnetoelectric induction, photoelectric effect formula, hall effect type, magnetoresistive effect formula, medium induction, and can also adopt acceleration transducer, displacement transducer, rotating coder etc., great majority are output pulse signal all.

Electromagnetic fan clutch of the present utility model effectively can monitor the temperature changing trend of each subtense angle of motor, form combined temp signal, control and monitor the real-time rotate speed of fan, effectively utilizing engine power, reduce kinetic equation loss, improve the radiating effect of electromagnetic fan clutch.

Above-described embodiment is described preferred implementation of the present utility model; not scope of the present utility model is limited; under the prerequisite not departing from the utility model design spirit; the various distortion that those of ordinary skill in the art make the technical solution of the utility model and improvement, all should fall in protection domain that the utility model claims determine.

Claims (3)

1. an electromagnetic fan clutch, comprise iron core (120), electromagnetic coil (118), main shaft (116), drive plate (110), fan fixed disk (108), clutch shaft bearing (114), the second bearing (102)

The pto＝power take-off of motor connects belt pulley (100) by drivign belt, main shaft (116) is through belt pulley (100) center, be fixedly connected with belt pulley (100), belt pulley (100), fan fixed disk (108), drive plate (110), iron core (120) and main shaft (116) coaxial line, fan fixed disk (108) is fixedly connected with main shaft (116) by the clutch shaft bearing (114) at center, iron core (120) is fixedly connected with main shaft (116) by second bearing (102) at center, the center of drive plate (110) is connected by the spline fitted of keyway with main shaft (116), drive plate (110) can be in axial sliding along spline,

The adhesive face of drive plate (110) is adjacent with the adhesive face of fan fixed disk (108), the intracavity bottom of fan fixed disk (108) is adjacent with the lumen openings end of iron core (120), electromagnetic coil (118) is installed with in the inner chamber of iron core (120), fan leaf (106) is fixedly connected on the outer circle wall of fan fixed disk (108)

The adhesive face of drive plate (110) is with on the adhesive face of fan fixed disk (108), and correspondence is provided with friction plate (112),

On the outer wall of iron core (120), the position corresponding with fan fixed disk (108) is provided with speed probe (104),

Electronic control unit and switching circuit, integrated operational amplifier circuit is on circuit boards integrated, be arranged in operator cabin, the wire guide of signaling line on iron core (120) of speed probe (104) connects electronic control unit, cooling-water temperature sensor is arranged on engine water cycle subsystem heat radiation position, oil temperature sensor is arranged on engine oil cycle subsystem heat radiation position, air-temperature sensor is arranged on engine air cycle subsystem heat radiation position, the signaling line of each temperature transducer is connected with integrated operational amplifier circuit, the wire guide access solenoid controlled loop of signaling line on iron core (120) at electromagnetic coil (118) two ends, switching circuit is also by signaling line access solenoid controlled loop.

2. the stepless speed regulation controller for electromagnetic fan clutch according to claim 1, it is characterized in that, comprise the electronic control unit (04) be connected with temperature transducer and speed probe (07) signal respectively by signal input port, the signal output port of electronic control unit (04) is by switching circuit (05) access solenoid controlled loop (06), comprise the first temperature transducer (01), second temperature transducer (02) and three-temperature sensor (03), also comprise the first power amplifier (71) adopting operational amplifier, second power amplifier (72), 3rd power amplifier (73) and the 4th power amplifier (74), an input end of the first power amplifier (71) connects the first temperature transducer (01), another input end connects reference signal vset1, an input end of the second power amplifier (72) connects the second temperature transducer (02), another input end connects reference signal vset2, an input end of the 3rd power amplifier (73) connects three-temperature sensor (03), another input end connects reference signal vset3, first power amplifier (71), the second power amplifier (72) are connected an input end of the 4th power amplifier (74) with the output terminal of the 3rd power amplifier (73), another input end of 4th power amplifier (74) connects reference signal vset4, and the output terminal of the 4th power amplifier (74) connects the signal input port of electronic control unit (04).

3. stepless speed regulation controller according to claim 2, it is characterized in that, the pin 4 of integrated operational amplifier circuit (007) connects working power vcc, pin 11 ground connection, pin 3 connects reference signal vset1, pin 5 connects reference signal vset2, and pin 10 connects reference signal vset3, and pin 12 connects reference signal vset4;

Connect pin 2 after working power vcc series resistors r1, after working power vcc series resistors r2, connect pin 6, after working power vcc series resistors r3, connect pin 9;

Pin 2 is connected after the signal output part series resistors r5 of the first temperature transducer (01), connect pin 6 after the signal output part series resistors r7 of the second temperature transducer (02), after the signal output part series resistors r9 of three-temperature sensor (03), connect pin 9;

Contact resistance r4 between pin 1 and pin 2, contact resistance r6 between pin 6 and pin 7, contact resistance r8 between pin 8 and pin 9, contact resistance r13 between pin 13 and pin 14;

Pin 1 connects pin 13 after series resistors r10, and pin 7 connects pin 13 after series resistors r11, and pin 8 connects pin 13 after series resistors r12, and pin 14 connects the signal input port of electronic control unit (04).