CN1294411C - Dynamic load performance test table for oil-impregnated bearing - Google Patents

Abstract

The present invention discloses a test bed for performance test of oil-retaining bearing tribology, which is composed of a drive device, a loading device and a test signal collecting control system. The present invention uses an eccentric wheel for generating dynamic loading force and ADAM4000 series intelligent modules to realize the detection and control of signals. The present invention is used for testing the performance of oil-retaining bearing PV value, sliding friction coefficient and temperature rising tribology under the dynamic loading condition. The test bed has the advantages of simple structure, low manufacturing cost, stable performance and high intelligent level.

Description

Oiliness bearing dynamic load performance test stand

Technical field

The present invention relates to a kind of oiliness bearing dynamic load performance test stand.

Background technology

Oiliness bearing is that, sintering repressed with metal powder and other antifriction material, shaping and immersion oil form, and its material is porous matter feature, can store lubricating oil, has self-lubricating function.It is usually used in inconvenient apply oil or the situation of oil leakage can not be arranged, and as food processing machine and textile machine, it also is widely used in agricultural machinery, instrument and meter and micromotor.The annual production of China's oiliness bearing is in hundred million.To the research and the application of oiliness bearing, except the research at aspects such as structure, technology, materials, the assessment of performance method of oiliness bearing also is a very research topic of significant.Present domestic also do not have unified oiliness bearing tribological property stand test method, evaluation criteria and testboard bay.

Summary of the invention

The object of the present invention is to provide a kind of oiliness bearing dynamic load performance test stand, is to be used to test under the dynamic load condition, oiliness bearing PV value, the coefficient of sliding friction, temperature rise tribological property.

In order to achieve the above object, the technical solution used in the present invention is as follows:

A kind of oiliness bearing dynamic load performance test stand comprises: drive unit, charger, test signal acquisition control system; Wherein:

1) drive unit: comprise two-way, a route threephase asynchronous rotates by the main shaft that belt wheel drives main spindle box, and antithesis test specimen axle is housed on the main shaft of main spindle box, and tested oiliness bearing is contained on the antithesis test specimen axle, and oiliness bearing is installed in and loads in the cover; Another road is on the output shaft of DC speed-reducing eccentric wheel to be housed;

2) charger: an end of first lever hangs with counterweight, the other end contacts with pulley, cramp bar on the pulley is fixedlyed connected with the ball line slideway is perpendicular, one end of ball line slideway contacts with eccentric wheel, be equipped with first in the middle of first lever and load the edge of a knife, be equipped with second under the first loading edge of a knife and load the edge of a knife, the second loading edge of a knife is installed in to load and puts, below loading cover second lever is housed, second lever contacts with load cell; Temperature sensor inserts in the hole that loads cover, contacts with the outside surface of oiliness bearing;

3) test signal acquisition control system: industrial computer links by serial port and intelligent object ADAM4520, and the intelligent object ADAM4520 other end links by data line with intelligent object ADAM4050, ADAM4024, ADAM4019 respectively; Intelligent object ADAM4050, ADAM4024 and first frequency converter link, and first frequency converter links with threephase asynchronous again; The intelligent object ADAM4019 other end by data line respectively with temperature sensor, amplifier, second frequency converter links, amplifier is connected to load cell again.

The useful effect that the present invention has is: utilize eccentric wheel to produce the detection and the control of dynamic load power and ADAM4000 series intelligent object realization signal.Be to be used to test under the dynamic load condition, oiliness bearing PV value, the coefficient of sliding friction, temperature rise tribological property.This test platform structure is simple, low cost of manufacture, stable performance, intelligent degree height.

This oiliness bearing dynamic load testing table mainly is fit to the performance parameter test of small-sized oiliness bearing, and its technical parameter is as follows:

1) oiliness bearing internal diameter: Φ 8-20mm;

2) oiliness bearing external diameter: Φ 12-40mm;

3) oiliness bearing width: 8-40mm;

4) rotational speed regulation scope: 0-3000rpm;

5) load range: 1.3-20kg;

6) measure temperature range: 0--150 ℃;

7) friction coefficient measurement scope: 0.05-0.5.

Description of drawings

Fig. 1 is that oiliness bearing dynamic load testing table is formed synoptic diagram;

Fig. 2 is that Fig. 1 oiliness bearing dynamic load testing table is formed side view;

Fig. 3 is the data-signal control and the acquisition system of testing table.

Among the figure: 1-threephase asynchronous, 2-main spindle box, 3-antithesis test specimen axle, the 4-oiliness bearing, 5-loads cover, the 6-load cell, the 7-lever, 8-temperature sensor, 9-counterweight, the 10-eccentric wheel, 11,12-loads the edge of a knife, the 13-lever, 14-ball line slideway, 15-shaft coupling, 16-DC speed-reducing.

Concrete embodiment

As shown in Figure 1 and Figure 2, threephase asynchronous 1 provides the rotating speed of a 0-1500rpm, by V band (ratio of gear n ₁/ n ₂=2) rotating speed is passed to the main shaft of main spindle box 2, main shaft and antithesis test specimen axle 3 are connected by fixed pin.Oiliness bearing 4 cooperates with antithesis test specimen axle 3, is installed in to load in the cover 5.The friction force that is produced during the oiliness bearing motion passes to load cell 6 by lever 7; The variation of temperature rise utilizes temperature sensor 8 to measure.Dynamic load utilizes the lever principle of lever 13, is delivered on the loading cover 5 by loading the edge of a knife 11,12, realizes the loading to oiliness bearing.Load the edge of a knife 11 and act in the middle of the lever 13, load the edge of a knife 11,12 and be used for the one-way that assurance power transmits, i.e. proof load power acts radially on oiliness bearing; Lever 13 1 ends act on the gravity of counterweight 9, keep this moment constant; The other end is the variable action point.The rotating speed that direct-flow deceleration electric motor 16 produces, by shaft coupling 15, drive eccentric wheel 10 rotates, thereby drives rolling linear guide 14 move left and right, realizes the displacement of variable action point on lever 13, is loading dynamic load force of generation on the edge of a knife 11.

As shown in Figure 3, signal controlling and collection realize by the intelligent object and the industrial computer of 4 ADAM4000 series.Utilize T/C (thermocouple signal) port in the ADAM4019 general-purpose simulation amount signal input module to come the temperature signal of collecting temperature sensor 8 and two V (volt step voltage amount) port to gather respectively from the friction force signal of load cell 6 with from the tach signal of second frequency converter; ADAM4024 analog signals output module is controlled the analog electrical flow of output 4～20mA and is given first frequency converter, control the output voltage frequency of first frequency converter, realization is to the rotating speed control of threephase asynchronous 1, and making motor output speed scope is 0～1500rpm; Control the start-stop of motor with ADAM4050 digital signal input/output module.In output channel, when the digital signal of output was 1, the voltage of output was 30V, and the output maximum current is 30mA, by the power supply of frequency converter connection motor, motor starting; When the digital signal of output is 0 be, the voltage of output is 0V, by frequency converter, has cut off the power supply of motor, and motor cuts out.Industrial computer is FR-S520S-1.5K-CHR, and amplifier is YZ-C, and load cell is YZ201.

1.PV the measurement of value: utilize the principle of work of first lever 13 and eccentric wheel 10, utilize following formula to calculate and record the PV value.

(1) calculating of load force W:

$W=\frac{2l-e(1-\cos \left(2\mathrm{\πnt}\right))}{l-e(1-\cos \left(2\mathrm{\πnt}\right))}G$

In the formula: l-counterweight is to the distance (mm) of the load edge of a knife

E-eccentric eccentric throw (mm)

N-DC speed-reducing rotating speed (rpm)

G-counterweight quality (g)

(2) calculating of PV value:

$\mathrm{PV}=\frac{9.8\×W}{d\×B}\·\frac{\mathrm{\πdn}}{60\×1000}$

$=0.00053\·\frac{\mathrm{nW}}{B}$

In the formula:: d-test bearing internal diameter (mm)

N-axle journal rotating speed (rpm)

B-bearing width (mm)

P-specific pressure (Nmm ^-2)

V-axle journal linear velocity (m/s)

2. the measurement of friction factor: the numerical value according to load cell 6 records can get friction factor by calculating.

The calculating of friction factor:

$\mathrm{\μ}=\frac{\stackrel{\‾}{M}}{\mathrm{rW}}=\mathrm{FL}\·\frac{1}{\mathrm{rW}}$

In the formula: M-moment of friction mean value (Nmm)

F-the act on pressure (g) at pressure transducer place

L-lever 1 brachium (mm)

R-test bearing inside radius (mm)

3. the measurement of temperature rise: utilize temperature sensor 8 directly to measure gained.

Claims (2)

1. an oiliness bearing dynamic load performance test stand is characterized in that comprising: drive unit, charger, test signal acquisition control system; Wherein:

1) drive unit: comprise two-way, one route threephase asynchronous (1) rotates by the main shaft that belt wheel drives main spindle box (2), antithesis test specimen axle (3) is housed on the main shaft of main spindle box (2), tested oiliness bearing (4) is contained on the antithesis test specimen axle (3), and oiliness bearing (4) is installed in and loads in the cover (5); Another road is on the output shaft of DC speed-reducing (16) eccentric wheel (10) to be housed;

2) charger: an end of first lever (13) hangs with counterweight (9), the other end contacts with pulley, cramp bar on the pulley and perpendicular the fixedlying connected of ball line slideway (14), one end of ball line slideway (14) contacts with eccentric wheel (10), be equipped with first in the middle of first lever (13) and load the edge of a knife (11), be equipped with second under the first loading edge of a knife (11) and load the edge of a knife (12), second loads the edge of a knife (12) is installed on the loading cover (5), below loading cover (5) second lever (7) is housed, second lever (7) contacts with load cell (6); Temperature sensor (8) inserts in the hole that loads cover (5), contacts with the outside surface of oiliness bearing (4);

3) test signal acquisition control system: industrial computer links by serial port and intelligent object ADAM4520, and the intelligent object ADAM4520 other end links by data line with intelligent object ADAM4050, ADAM4024, ADAM4019 respectively; Intelligent object ADAM4050, ADAM4024 and first frequency converter link, and first frequency converter links with threephase asynchronous (1) again; The intelligent object ADAM4019 other end by data line respectively with temperature sensor (8), amplifier, second frequency converter links, amplifier is connected to load cell (6) again.

2. a kind of oiliness bearing dynamic load performance test stand according to claim 1, it is characterized in that: industrial computer is FR-S520S-1.5K-CHR, and amplifier is YZ-C, and load cell is YZ201.

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