SU945694A1 - Rotor rotation axis position determination method - Google Patents

Description

(54) METHOD FOR DETERMINING THE POSITION OF THE ROTATING AXIS OF THE ROTOR

one

The invention relates to measurement technology and can be used, for example, to determine the axis of rotation of a platform of a centrifugal machine when measuring the magnitude of an overload acting on a test product mounted on a rotating platform.

A known method for determining the position of the axis of rotation of the rotor, which results in the rotor being mounted on the spindle rotating in the supports, and determining the position of the axis of rotation of the rotor according to the position of the axis of rotation of the spindle GP.

The disadvantage of this method is the need to install the measured rotor on an additional spindle, which reduces the cumbersomeness of determining the axis of rotation of the rotor.

The closest to the invention to the technical essence is the method of determining the position of the axis of the rotor vrdadeniya, including the fact that

using an overload sensor, linear overloads are measured while the rotor rotates and judging by their value the position of the rotation axis. This method is used in rotors of the type of centrifuges, designed to test simulate the effects of linear overloads on the test product, and consisting of a platform and a spindle 2.

Claims (2)

The disadvantage of this method is that during testing a significant error in determining the coordinates of the axis of rotation is allowed, and therefore an error is introduced in the determination of the magnitude of the overload acting on the test rotor. This error is caused by the presence of gaps at the point where the platform connects with the spindle, which leads to the deviation of the axis of rotation of the platform from the position of the axis of the spindle and makes it difficult to determine the coordinates of the real axis of rotation. The purpose of the invention is to improve the accuracy of measurement. This goal is achieved by installing an overload sensor in the geometric center of the rotor, moving the overload sensor to move the lock in a plane perpendicular to the axis of rotation when the rotor rotates. The load of the sensitive element of the sensor is judged on the position of the axis of rotation of the rotor. The drawing shows devices; DL implementations of this method are applicable to tests simulating the effect of linear overloads on the tested rotor. In the geometric axis of the rotor, made in the form of platform 1, having the possibility of rotation around the vertical axis, the spindle 2 and the articulating mechanism 3 connecting them, install an overload sensor k so that its axis of sensitivity is directed along the radius of platform 1. Sensor The overloads can move along the platform radius in both directions by rotating the lead screw 5 from the electric motor 6. The signals of the overload sensor are recorded by the measuring device 7. The essence of the method is In the geometric center of the rotating rotor, an overload sensor is preset, the sensor on the ocbl oToporo is directed along the platform radius, the rotor is rotated and, by moving the overload sensor in a plane perpendicular to the axis of rotation of the rotor, the sensor signal corresponding to zero overload then, the rotation is stopped and the position of the actual CIR of rotation of the rotor is determined by the method of finding the center of mass of the load of the sensitive element of the overload sensor, marked on the sensor with a mark. b is carried out as follows. Using an electric motor 6, the spindle 2 is rotated with the platform 1 and the overload sensor k mounted on it in the geometrical center. After the platform is brought to rotation, the voltage is applied to the electro 9 4 engine 6, which rotates the spindle screw 5, moving the overload sensor 4 in the radial direction on the platform 1. The power supply of the electric motor 6 changes polarity, and , the direction of movement of the sensor of the overloads is changed. In this case, the overload sensor signal is monitored by measuring device 7. A decrease in the signal level indicates that the overload sensor is approaching the real axis of rotation of the platform and vice versa. When the signal level of the overload sensor k is reached, corresponding to zero overload, its movement is stopped and the rotation of platform 1 is stopped. At the same time, the position of the center of mass of the load of the sensitive element of overload sensor A corresponds to the position of the axis of rotation of the platform. . The application of the described method allows with high accuracy to find the position of the real axis of rotation of the platform, and hence the magnitude of the overload acting on the test product. Claims The method of determining the position of the axis of rotation of the rotor, is that using an overload sensor measure linear overloads during rotation. The rotor research institutes and by their value judge the position of the axis of rotation, characterized in that, in order to improve the measurement accuracy, an overload sensor is moved in the center of the rotor in the center of the rotor until the rotor rotates and at the location of the center of mass of the load of the sensitive element of the sensor is judged on the position of the axis of rotation of the rotor. Sources of information taken into account in the examination 1. The author's certificate of the USSR If 303288, cl. G 01 M 1/12, 1970. 2. Saveliev IV, the course of general physics. M., Science, 1970, Vol.1., Pp.162-166 (prototype). J