PL160593B2 - Apparatus for testing lubricated and not-lubricated parts contacting each other on a small area for resistance to wear and frictional resistance - Google Patents

Abstract

A device for testing wear resistance and resistance to motion of lubricated and non-lubricated components which form a concentrated contact, composed of a drive motor, which, via a transmission, spins a spindle ended with a holder of a conical counter sample mounted in it, to which the samples in the form of three small shafts are pressed down, where the samples are mounted in the holder which is pressed down with a weighing lever with weights and a counterweight characterised in that between the motor (1) and the spindle of the counter sample (3), there is a belt transmission with a variable gear ratio with a cogbelt (2), and, on the casing (11), a strain gauge (6) is fixed, which is coupled with the arm (10) fixed to the holder (5) of immobile samples (4), and also, it has a the control-and-measurement system U is composed of two circuits (O1, O2), where the first circuit (O1) is used to measure and record the moment of friction between the samples (4) and the counter sample (3) and is composed of a strain gauge (6), an amplifier (12), a voltage-to-frequency converter (13), frequency counter (14), a digital reading panel (15), interface (16) and a computer connector (17) connected in series, while the second circuit (O2) is used to measure the rotational speed of the spindle with the holder of the counter sample (3) and is composed of a pulses amplifier (17), pulses doubler (19), frequency counter (20), a digital reading panel (21), interface (22) and a computer connector (23) connected in series.<IMAGE>

Description

The subject of the invention is a device for testing the wear resistance and resistance to movement of lubricated and non-lubricated elements forming a concentrated contact.

Known devices of this type include a drive motor that rotates the spindle through the gearbox, ending with a handle with a conical counter-sample mounted in it, against which the samples in the form of three rollers are pressed, the samples being held in a holder, which is pressed by a loading lever with weights and a counterweight. .

The essence of the invention is a device characterized in that between the drive motor and the spindle of the counter-sample there is a gear with a variable ratio belt with a toothed belt. A strain gauge is attached to the housing, which is coupled to a lever rigidly connected to the holder of stationary samples. Moreover, it has a control and measurement system consisting of two circuits, the first one is used to measure and record the friction torque between the samples and the counter-sample, and the second one is used to measure the rotational speed of the spindle with the counter-sample holder. The first circuit consists of a strain gauge, an amplifier, a voltage-frequency converter, a frequency counter, a digital readout panel, an interface, and a computer interface. The second circuit consists of a pulse amplifier, a pulse doubler, a frequency counter, a digital readout panel, an interface, and a computer connector.

The subject of the invention is shown in an embodiment in the drawing, which shows a diagram of the device.

The device has a drive motor 1, which rotates the spindle through a gear with a toothed belt 2, which ends in a handle with a conical counter-sample 3. The counter-sample 3 is pressed with three-roller samples 4, placed in a handle 5, which is pressed by a loading lever 7 with a weight 8 and a counterweight 9. A strain gauge 6 is attached to the housing 11, which is rigidly coupled with the lever 10

160 593 connected with a holder of 5 stationary samples 4. The control and measurement system U consists of two circuits Oi and O2, where the circuit Ol is used to measure and record the friction torque between the rollers 4 and the counter-sample 3, and the O2 circuit to measure the spindle speed with a counter-sample holder 3. The circuit O i consists of a series connection of a strain gauge 6, an amplifier 12, a voltage-frequency converter 13, a frequency counter 14, a digital readout panel, an interface 16 and a computer connector 17. The O2 circuit consists of a series connection of a pulse amplifier 18, a pulse doubler 19, a frequency counter 20, a digital reading panel 21, an interface 22 and a computer connector 23.

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Department of Publishing of the UP RP. Circulation of 90 copies. Price: PLN 10,000

Claims (1)

Patent claim A device for testing the wear resistance and resistance to movement of lubricated and non-lubricated elements forming a concentrated contact, containing a drive motor that rotates a spindle ending with a handle through a gearbox with a conical counter-sample mounted in it, against which the samples in the form of three rollers are pressed, with the samples being found in the holder, which is pressed by a loading lever with weights and a counterweight, characterized in that between the motor (1) and the counter-sample spindle (3) there is a gear with a variable ratio belt with a toothed belt (2), and the housing (11) is attached there is a strain gauge (6) coupled with a lever (10) rigidly connected to the holder (5) of stationary samples (4), and it has a control and measurement system (U), which consists of two circuits (Οι, O2), where the first circuit (Ol) measures and records the frictional moment between the samples (4) and the counter-sample (3) and consists of a series connection of the sensor a strain gauge (6), an amplifier (12), a converter (13), a frequency voltage, a frequency counter (14), a digital readout panel (15), an interface (16) and a computer interface (17), and the second circuit (O2) is used to measure spindle speed with a counter-sample holder (3) and consists of a series connection of a pulse amplifier (17), a pulse doubler (19), a frequency counter (20), a digital readout panel (21), an interface (22) and a computer interface (23) .