TVPC Controller of temperature and speed used for fluiid torque coupling (TVPC-01)Parameter TVPC Controller of temperature and speed used for fluid torque Coupling
Description
TVPC temperature speed controller is consist of two main assemble
I
TVP temperature probeTVPS magnetic sensor.the TVP temperature probe is mounted on fluid coupling.
II TVPS magnetic sensor.the TVP temperature probe is mounted on fluid coupling.
TVPC temperature speed controller can be in place of thermal trip switch, and offered as a standard accessory on fluid coupling.it will provide protection against
o
verheating, if the coupling is overload, overheating,low speed (speed is lower than pre-set speed value).are used in place of standard fusible fill plug.and thermal trip switch.
If an overload jam.stall or fluid leak occurs.the fluid coupling silp wil increase.
Continuous high slip will cause the fluid temperature to rise.at the designed temperature speed probe will change the magnetic specification.TVPS magnetic sensor will test overheating.sound an alarm.,light an alarm or cut out the drive motor.
During normal operation.the TVP temperature speed probe is magnetic material.
TVPS magnetic sensor can monitor the rotate speed of fluid coupling.When overload or other situation the fluid temperature is overheat(excessive
the pre-setting Value Such as 125ºC). the magnetic sensor will give alarm signal. Cut out the drive motor.
Also the magnetic sensor will give alarm signal when the rotate speed if fluid coupling is down the pre-setting speed value.
A TVPC temperature speed controller in the moto starter control circuit of controlled torque coupling is recommended for protection of connected equipment and coupling where damaging thermal buildup could develop.
TVPC temperature speed controller is adjustable at the control box.It is set at a
required speed and continually compares the actual speed of the driven shaft with the set cutout speed.
During overload,the coupling slips at a predetermined speed. When the driven shaft speed drops below the cutout switch speed setting.it opens the moto circuit and the drag load stops the motor shaft.
When the under speed cut-out swicth is wired for automatic reset,the drive is immediately read for service(after overload is removed.)without resetting the circuit at any point. To restart the drive,just press either the main or romote control start button.The motor will not maintain normal operation if the overload has not been removed because the motor contractor circuit will reopen as soon as the start button is released.
The customer may incorporate a warning light or an alarm to the circuit the signal the operator of an overload or shutdown condition.
Caution:the effect of open keyways on coupling or clutch balance should always be considered. Mounting Diagram of TVPC temperature speed controller.
Caution:Don't use a temperature speed probe on fluid coupling without a TVPS magnetic sensor.
2.Principle
While the coupling is rotating and below the response temperature of 125ºC,the transmitter stops emitting pulses and the output relay of the evaluating
instrument. The pulse mumber is compared in the evaluating instrument with the required value set on the front plate and, when the pulse number is fallen below,cause the output relay to cut out.
If as a result of an operating fault the response temperature(oil temperature)exceeds the actuating temperature of 125ºC.the transmitter stops emitting pulses and the output relay of of the evaluating instrument drops out.The ouput relay can trigger a fault signal or trip the drive cut-out.
The evaluating instrument has a time delay withc prevents a fault signal during the drive starting phase.If the monitoring system has cut out,the operating fault must first be rectified. The transmitter must not be exchanged.After it has cooled down to below the actuating temperature.the coupling
is once more ready to operate.
Depending on the starting heating to be expected(moment of inertia of the drive unit).however, the drive should be switched on only at coupling temperature under 90ºC.
Note:
If the coupling is started up again without cooling down.as would be possible because
of the time delay. The coupling may further heat up(starting heating).and there is a risk that the fusible safety plug will operate.
3.Application
The controller of temperature and speed monitors the required operating condition of the fluid coupling contactless and requires no maintenance.Spraying and loss of operating fluid if the coupling overheats and the pollution of the enviornment associated with it can be avoided. In the case of internal-gear drives the output speed(minimum value). in addition to the temperature,can be monitored. In this case the controller of temperature and speed cuts out immdediatly the output speed cuts out immdediately the output speed falls below its required value or the driver stops even before the coupling overheats.The controller of temperature and speed can be used on coupling and upward at peripheral speed >15m/s.The transmitter is fitted to the coupling in place of the screw plug(fusible plug).
4.Fitting
The controler of temperature and speed comprises the transmitter(probe of temperature and speed).the pick-up(magnetic sensor) and the evaluating instruement. The transmitter is fitted to the coupling housing in place of the screw plug(fusible plug or thermal trip plug).Also the fusible safety plug(160ºC)remains in the coupliing as an emergency safety device.The pick-up is positioned flush with the turning circle of the transmitter.so that there is a gap of 2 mm between the end faces of the transmitter and the pick-up.The pick-up must be mounted vibration free on a firm bracket or part of the bell-housing.
Flush-fitting in metal parts is also possible.
The evaluating instrument must be preferably be installedl in a switch cabinet of the control system provided.
3.1 Fitting transmitter not included in our delivery.
Retrofitting of the contorler of temperature and speed in already installed fluid coupling is possible without reworking.
5.Component description
5.1
Transmitter
The transmitter comprises an stainless steel bearer screw with an in-built magnet system which changes its field strength according to the temperature.The magnet system is designed so that at a pick-up distance of 2 mm a cut-out temperature of 125ºC results.If the gap between the pick-up and the transmitter is greater.the controler of temperature and speed donot work at lower temperature.5.1.1
Technical data5.2
pick up(magnetic sensor)
The pick-up records the magnetic field of the transmitter each time it is passed and.if there is sufficient field strength. sends a square-wave signal to the evaluating instrument. Below a fixed field*-strength threshold(temperature switching point) no signal is sent.5.2.1
Technical feature
Type designation
Output signal to EN60947-5-6
Type MS threaded tube chromed M18×1×70mm,also M18×1×50mm can be selectable.
Type of fitting flush/not flush
Type of protection IP67.
Operating temperature -25ºC to +70ºC
6.Connection
The connection between the pick-up and evaluating in instrument is established via a two-core condutor.The max.length of conductor with a conductor cross-sectional area of 1.0 square milimeter
is 500m.
The feed line must always be laid seperately and not with others in multi-core conductors(risk of coupling -in interfering voltages).