SU705285A1 - Device for measuring torque at a gearing shaft - Google Patents

Description

(54) DEVICE FOR MEASURING TORQUE / AT TRANSFER

The invention relates to a load-measuring technique and can be used to measure the torque on a transmission shaft, for example, a spindle head or a feed drive gearbox.

There are known devices for measuring torque, based on measuring the deformation and one of the transmission elements l.

It is also known a device for measuring the torque on a shaft by radial forces acting on bearings in which the transmission shaft 2 is mounted. This device is a measuring ring of a bearing race, performed as separate segments formed by radial slots some of which are on the inner and outer surfaces. applied to the strain gages, the output signal is proportional to: the measured moment.

The basic feature of this device is the dependence of the output signal on the deformation of the load cell injected into the gear to measure the force and rigidity of the support and, consequently, the overall rigidity of the gear.

The closest to the technical essence of the invention is a device for measuring usyli acting on the impeller of the machine, containing a shaft mounted on supporting ball bearings and placed in a hydraulic sleeve, which is held in suspension at one stage of the cells formed by cameras in a fixed case The surface of the hydraulic bushing is connected to the surface of the hydraulic sleeve, and the force and torque gauges are connected by hydrolines to the ullus $ gauuth and the chambers,

The disadvantages of the known installation are low measurement accuracy, due to the fact that the torque in it is determined by the value of tangential forces in the tangential hydrostatic bearings, which are also affected by radial forces, the measured measurement results, and the bulkiness of the struts, since The unit is a bench-mounted unit, consisting of a powerful hydraulic brake with a cooling system and eleven hydrostatic supports (mesdos) with gauges. The aim of the invention is to supervise. measurement accuracy and construction simplification. This goal is achieved due to the fact that in the proposed device for measuring the torque on the transmission shaft, it contains, located in the infusible housing of the transmission and in contact with hydrostatic bearings about YMA with BEARING u6, in the alternator, one of the ends of the transmission shaft and sensors, Hydro-connected with hydrostatic supports, introduced (| an anecillator installed in the same housing in conjunction with the transmission shaft and now available in the form of a coaxalpine sleeve with double sleeves located in the diameter The plane passing through the kinematically mated transmission shafts, and the bearing assembly cage is equipped with two external outlets fixed in the said flutes of the housing, ODS1 Ez 5thr., filled with thinned out, and the Hydrostatic bearings are located between 1 and 3 in the symmetric area. The shaft in the plane passing through this axis is perpendicular to the face of the flanks. In FIG. 1, a general view of the pre-vent device in FIG. 2 is a sectional view of FIG. 1 with a pressure sensor connection circuit. In a stationary housing of a 1st gear on the Koppa shaft 2,% INSHYCH Yy1 with: eY | Mixed shaft 3, bearing 5geel 4 is installed, psedetal in holder 5 (Fig. 1) Holder 5 has a diametrically located position. The external protrusions 6 and 7 (FGI, 2) The protrusion of the If closest to the kinematically matched shaft 3 is made thinned, pliable. In the fixed case of the 1st gear, fpaned 8 is installed coaxially with shaft 2. Flaned is made with two Through slots. The grooves of the flange are located in the diametral plane passing through the non-woven shaft. The tabs 6 and 7 of the cage, 5 wafi in these grooves, Exit: pass t SfJJO3b. THESE grooves and UDI raiugs in the housing are gears, the side over the bones of the protrusions are in contact with the side slots of the flange slots, the grooves of the flange prevent the sleeves from turning together with the bearing assembly and fix the drop attachment. Between the flange 8 and the holder 5 symmetrically relative to the axis 0 O of the shaft 2 in the plane passing through this axis, there are two. Hydrostatic supports 9. The supports are oriented perpendicular to the plane of the grooves of the flange 8. The hydrostatic support supports the holder in its original position. Pressure sensors 10 are connected to the hydrostatic bearings 9 by the hydrolines. The device operates as follows. The torque from the shaft 2 to the kinematically associated shaft 3 is transmitted through gears mounted on these shafts (Fig. 2). Under the action of the circumferential force Rocor, a support reaction force T arises in the support (Fig. 2). Under the action of the spacer shrill, a reaction force P occurs. The support reaction forces are sensed by the bearing unit 4 (Fig. 1) in transferring to the holder 5 (Fig. 1 H 2). The grooves of the flange, in which the projections b and T of the clip 5 are fixed, are made through, therefore the reaction force Pg is perceived directly by the transmission body 1 through the clip b of the clip. The reaction force P tends to deflect the transfer shaft and displace the clip, in which the end of this shaft is fixed in the ball bearing unit. TSh4 as a holder is fixed in the housing and grooves of the flange, then it can be displaced by the action of force P only when the projection 7 bends. in the direction perpendicular to the plane of the grooves of the flange. The holder is con- tacted with the oil layer of the hydrostatic support, which tends to reduce the thickness of this layer. Hydrostatic supports, which are equipped with automatic control systems, equipped with static regulators, ensure that the pressure in the support changes in such a way that the thickness of the oil layer is kept constant. The change in pressure in the oil layer is made by the regulators, which follow the maintenance of the oil layer. The change of the Daelen in the hydrostatic support leads to the emergence of a force opposing the displacement of the new cage. Under the action of the reaction force, the pressure changes in this support, and the thickness of the oil layer remains almost unchanged due to its high rigidity.

The force arising in the hydrostatic support and the reaction force P, which tends to displace the holder, are balanced. Because of this, the sleeve 4 does not move and the shaft axis remains in its original position .. -.

The pressure of the oil layer in the hydrostatic support is proportional to the reaction force P ,. arising under the action of the district power of the ROCR (Fig. 2). The pressure change in the hydrostatic support is measured by pressure sensors 10. Since the pressure change in the hydrostatic support is functionally related to the transmitted torque torque, the output signals of the pressure sensors are used to determine the torque transmitted by the transmission.

The use of this device allows the accuracy of the torque measurement in high stiffeners to be measured, and to increase the measurement accuracy it is not necessary to reduce the stiffness of the support, since in this device the torque is not measured. by changing the deformation of one of the transmission elements, and by measuring the pressure in a hydrostatic support, which has great rigidity and does not reduce the overall rigidity of the transmission, and at the same time allows us to obtain a useful signal of sufficient magnitude.

invention formula

A device for measuring the torque on the transmission shaft, which contains a holder in a stationary transmission housing and in contact with hydrostatic bearings with a bearing assembly, in which one of the transmission shaft is degraded, and sensors connected with hydrolidine and hydrostatic. supports, characterized in that, with. the goal is to improve measurement accuracy and simplify the design, a flange is inserted into it, which is mounted in a stationary housing coaxially with the transmission shaft and designed as a coaxial sleeve casing with two grooves located in the diametrical plane passing through the kinematically coupled transmission shafts, and a bearing assembly cage it is equipped with two external protrusions fixed in the pointed 1X slots of the flange and the body, one of which is made thinned, and the hydrostatic bearings are placed between the flanges and the holder relative to the shaft axis in a plane passing through this axis perpendicular to the plane of the flange grooves.

Sources of information taken into account in the examination

1. Frolov L. B. Torque measurement, 1976

2. USSR author's certificate N9 431409, cl. G O1 L C / PA, 1971.

five

3. USSR author's certificate N9 450976, cl. 6 01 L, l975 (prototype).