Automobile clutch assembly comprehensive performance test bed- QC-LHZH450

Overview of functions:  This machine can meet QC / T25-2004 "car dry friction clutch assembly technical conditions", QC / T 25 --- 1992, QC / T 27 --- 1992

QC / T27-2004 "car test methods of dry-friction clutch" on the clutch assembly of test specification standards. It can be used for a variety of clutch 160 ~ 450 comprehensive test assembly.

Model: QC-LHZH450 330-450 clutch assembly

Test items:

clutch heat load measurement test

clutch friction torque measurement test

clutch linings wear resistance test

clutch performance test

Performance indicators:

Clutch performance test and test content:

According to test methods of automobile clutch QC / T25-2004 and QC / T277-92, QC / T27-2004 standards:

•Maximum torque: 5000 N • m (dynamic, choose 5000 N • m sensor) Accuracy: ± 0.5% FS

•Torque sensor: 5000 N • m

• Road resistance moment: 1000 N • m (max) accuracy: ± 0.5% FS

•Maximum speed: 2000 (r / min) Accuracy: ± 0.5% FS

•Minimum adjustable inertia 0.5kg • m2; inertia Adjustable 3 ~ 14kg • m2 (packets)

•Mating cycles: 2 to 6 times / min

•Temperature range: room temperature ~ 450 ℃ Accuracy: ± 1% FS

•Press QC / T25-2004 and QC / T27-92, QC / 27-2004 execute the relevant regulatory requirements;

•Ambient temperature: 5º ~ 35 ℃, relative humidity less than 80% (25 ℃ when);

•Power supply voltage variation does not exceed ± 10%;

•non-corrosive medium and strong vibration source around

The main structure and principle:

Test table layout:

•installed in the carriage motor, gearbox, slip ring, the flywheel and the support member. In the bed arrangement is a clutch unit mounted specimens, torque speed sensor unit mounted inertial flywheel unit equipment, road resistance torque and braking unit installed, ventilation and dust removal devices. 

• Cars start the process, the clutch torque transmitted to overcome the moment of inertia of the vehicle and the road resistance torque, as well as their own automotive driveline friction torque.

• Cars passing relationship clutch during starting process can be simplified energy: kinetic energy of the engine in the process of slipping in the clutch, to overcome the inertia of the flywheel when the first axis acceleration, inertia torque needed work done; overcome transformed into a shaft road resistance moment the work done. At the same time energy is transformed in thermal energy for slipping clutch temperature. This energy loss is often referred to as total friction work. Look at it from the mechanical part of the basic structure of an automobile engine is representative of the motor, on behalf of the translation quality automotive inertia flywheel, on behalf of the road resistance torque loading means and for the next cycle of the inertia flywheel brake prepare and install the stent bed assembly body composition. To enable the apparatus organically linked to the operation according to prescribed procedures, and the assembly measure, record and manipulate the configuration of a control system, a set of measuring and recording system, in addition to add some necessary auxiliary equipment such form a complete clutch comprehensive performance test bed.

1, the motor: a motor test stand with the car engine power does not require the same reason as the car starts not in the greatest functional point, another test stand for thermal loads. Measurement period about 30s, do friction test cycle 15s, clutch engagement process is only 1.5-2s around, so the engine is smaller than the motor power.

2, flywheel inertia: inertia flywheel group bearing body fixed to the base. Use disc inertia flywheel inertia fully consider the maximum speed and structural arrangements.

3, the connection between the Department of loading: The quality of the diaphragm coupling, so transmission steady, accurate, no noise.

4, the separation mechanism and pneumatic systems

Using pneumatic separation mechanism. Rod and separation arm connected with the drive shaft spline shaft is connected at one end and the other end into the splined inner clutch plates. Combined with the use of cylinder moves the clutch separation, control the separation cylinder, the road resistance from the cylinder, the brake cylinders and cylinder moves the carriage movement.

5, torque, torque, slipping angle measurements:

The test rig used in the structure leads to a slip ring temperature signal, proximity switches measure the speed signal, driven plate of torque, speed through speed torque sensor acquisition, driven by sliding friction angle rotation speed, torque sensors are lost computer slip handle.

6, brakes and road resistance torque applying means

The brake caliper disc brake to brake, road resistance torque is applied to the road as the driven disc using drag torque device. Pressurized cylinders are used way pneumatic proportional valve automatically adjusts the air as the pressure applied to adjust the friction resistance from the road. Resistance from the road by pulling pressure sensor control.

7. Dust scheme

Clutch test rig at work, due to friction phenolic resin produced 320-degree heat, the resin gasification produce large amounts of organic waste, accompanied by chemical gas smell, a small amount of friction during the test, but the great smell and smoke, we the device is equipped with smoke or smoke and odor means the gas directly into the atmosphere, dust emission device basic principles and structure is as follows:

   Dust scheme (a)

Simple test plasma gas odor removal and simple (or directly with centrifugal fan) and then pipe the gas after the dust directly excluded outdoor atmosphere;

Advantages: simple structure, low operation and maintenance costs;

Disadvantages: exclude any natural gas with traces of dust, odor is not removed, it is not environmentally friendly.

Dust scheme (II)

After purification and odor removal treatment and then exhausted to the outside, protecting indoor and outdoor working environment,

Pros: After testing the treated gas directly into the interior or the atmosphere, will not cause pollution.

Disadvantages: high cost, use and maintenance costs are high.