SU1384922A1 - Calibrating vibration-testing machine - Google Patents

Description

(21) 4135103 / 25-28

(22) 10/17/87

(46) 03/30/88. Bul № 12

(71) Kharkiv branch of the Central Design Bureau of Soyuzenergoremont

(72) B.T. Runov, MF Kvashin, V.I. Tz Bulko, A.S., Zorin

and V.A. Yegorova

(53) 531.717 (088.8)

(56) Lenk A. et al. Mechanical Testing of Instruments and Apparatuses. M .: 1976, p. 187-188.

(54) CALIBRATION VIBROSTAND

(57) The invention relates to a measurement technique and can be used to calibrate measuring instruments intended to measure the vibrations of the shafts of machines in terms of the maximum displacement from

middle position in the measurement plane. The aim of the invention is to provide the possibility of calibrating the maximum displacement meters of the shaft of the machine by reproducing two instantaneous displacement components of the vibration displacement, rigidly interconnected in phase. The eccentrics 18 and 19 are set to the given amplitudes on the scales 20 and 21, and these eccentrics are fixed with the clips 22 and 23. The sleeves 10 and 11 are set to the given phases on the scales 14 and 15, and these sleeves are fixed by the clips 16 and 17. Rotation is set to the drive shaft 7 and the gaps and S g are measured, and the calibration is carried out by comparing the readings of the calibrated vibration meter connected to the transducers 5 and 6 with the calculated value

SMc, kc max (Rear) 2 + (Sg.). 2 Il.

about

cl

Siil

with

00

four

WITH

u to

FIG. g

The invention relates to a measurement technique and can be used to calibrate measuring instruments intended to measure the vibrations of the shafts of machines in terms of the maximum displacement from the average position in the measurement plane.

The aim of the invention is to provide the possibility of calibrating the meters of the maximum movement of the machine shaft.

FIG. 1 shows a diagram of a calibration shaker; in fig. 2 - the trajectory of movement of the axis of the shaft of the machine in the dynamics.

The calibration shaker includes a housing 1, a platform 2 mounted on it with sockets 3 and 4 for fastening calibrated measurement transducers 5 and 6, a drive shaft 7 mounted on the housing 1 with an annular collar 8 having a readout mark 9, and eccentric exciters mounted on the shaft, each of which are made in the form of sleeves 10 and 11 with flanges 12 and 13, on which angular scales 14 and 15 are applied to clamps 16 and 17 of the angular position of these sleeves, as well as eccentrics 18 and 19 mounted on sleeves 10 and 11 on cylindrical erhnost x and latches 22 and 23, their angular positions.

Calibration stand works as follows.

In the initial state, the eccentrics 18 and 19 are installed with the help of scales 20 and 2 ГV, the position corresponding to the specified amplitudes of oscillations S and Sg, and the clamps 22 and 23 rigidly fix them on the bushings 10 and 11. Install the bushings S and 11 with the scales 14 and 15 to the position corresponding to the specified oscillation phases 1 and 1p, and the clamps 16 and 17 rigidly fasten them to the drive shaft. 7 Install transducers 5 and 6 connected to the sockets 3 and 4 in front of the eccentrics 18 and 19.

to calibrated shaft vibration meter (not shown).

During calibration, the rotation of the drive shaft 7 is set and the clearances are changed. and SB, between vibration transducers 5 and 6 and the cylindrical surfaces of eccentrics 18 and 19, which are determined by the formulas

ten

S, cosi / j S.cosi / g,

Sbi

a calibration is carried out by comparing the readings of the shaft vibration meter being calibrated with a calculated value determined by the formula:

S lacquer max. ,

(S ,,) + (SB,)

Claims (1)

Invention Formula A calibration shaker, comprising a housing, a platform mounted on it with a socket for mounting a calibrated measuring transducer, a drive shaft and an eccentric vibration exciter associated with it, characterized in that in order to enable calibration of the maximum displacement meters of the machine shaft, it is equipped with an additional vibration exciter identical to basically, each of the exciters is made in the form of a sleeve mounted on the drive shaft with a flange that interacts with an annular collar, a cat The ory is made on the drive shaft, and the clamper of the angular position of the sleeve, as well as the eccentric and the clamper of its angular position mounted on the sleeve, on the cylindrical surface of the shoulder there is a reading mark: on the cylindrical surfaces of the flanges and eccentrics, the angle scale and amplitude scale are applied, a second jack is made to mount the second calibrated transmitter, and the jacks are located opposite the respective eccentrics. llb-i fai.2