SU1402826A1 - Device for checking relative displacement of two rotating parts of machines - Google Patents

Abstract

The invention relates to mainframe, mainly to in-out diagnostics of the technical condition of the bearing assemblies of machines and mechanisms. The purpose of the invention is to increase the efficiency of control relative to the displacement of two rotating machine parts and simplify operation. The device contains in each of its two channels a radiation source or field, pulse shapers, as well as a common mixer and indicator. An adjustable delay line has been introduced. A block of automatic self-monitoring of channel health is connected to each of the mixer inputs. The device makes it possible to measure and compare in time the pulses of radiation from the shaft and ring of the support, and to determine the displacement of the ring by the difference in time between these pulses. 3 il. i (L

Description

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The invention relates to mechanical engineering, mainly to in-place diagnostics of the technical condition of bearing units of machines and mechanisms.

The purpose of the invention is to increase the efficiency of control and to prolong the operation.

FIG. 1 is a schematic diagram of a device for controlling the mixing of two rotating machine parts; in fig. 2 shows a source-receiver scheme based on the use of a process file as a simulator of a source of radiation; in fig. 3 - voltage diagrams of a two-channel measuring device.

A device for controlling the relative displacement of two rotating parts of machines i consists of two sources 1 and 2 of radiation i or field, mounted on the shaft 3 and the inner ring of the support 4, receiving-; NIKS 5 and 6 radiation located; so that when the shaft and the inner ring of the source rotate, they pass by j receivers, and connected to their output: a dual channel measuring device; The device consists of pulse formers 7 and 8, the output of one of which is connected to one of the inputs: the mixer 9, and the output of the second - to the other; the input of the mixer through the adjustable delay line 10, blocks 11 of the automatic: self control of the health of the channels connected to the inputs of the mixer,; and block 12 emergency automation, the input of which is connected to the output of the mixer. When the radiation receiver IB is in the form of, for example, inductive, capacitive |, etc., sensors, technological protrusions or depressions on rotating parts, for example, are used as the emitter I; technological file 13 inner I of the ring of the roller bearing. : The inputs of the two formers 7 and 8 receive pulsed signals Ui and Ug from the radiation receivers or the floor as the radiation sources pass by them. From the formers of the formers, the formed rectangular pulses U and U4 arrive: Oz — via the adjustable delay line 10 to one of the inputs of the mixer 9; U4 - directly to the second input of the mixer, which in the case of misalignment of pulses Us and U4 on the time axis t At its output forms a pulse received at the input of the emergency automation unit 12, which triggers the shaft offset signal relative to the inner ring of the bearing. If the pulses Us and U4 coincide on the time axis t, there is a zero level at the mixer output, which does not lead to an alarm. The introduction of an adjustable delay line into one of the channels allows simultaneous operation of both channels when the rotational speed changes and the radiation sources and receivers are randomly set or the field is passed when the shaft rotates and the source's internal ring passes by the receivers. Two similar automatic self-monitoring units of channels 11 are connected to each of the mixer inputs; they consist of an information signal extraction unit with pulses in the channel and an alarm signaling unit with no information signal.

The use of the proposed device makes it possible to simplify the installation conditions of radiation sources and receivers or the floor and operating conditions of the device during repeated use without disassembling the assembly with rotating parts by inserting an adjustable delay line into one of the channels; to ensure high operational reliability of the device operation due to the timely detection of its failures according to the data of the automatic self-monitoring units of the channels; to simplify the device and increase its reliability by using rotating lugs as the emitters of the technological protrusions or depressions; shorten the repair time, for example, the connection of the shaft-bearing in the shaft fan and lifting installations due to the timely detection of the shaft displacement relative to the inner ring of the bearing.

Claims (1)

Invention Formula A device for controlling the relative displacement of two rotating machine parts, comprising a series-connected radiation receiver, pulse generator, a mixer and an emergency automation unit, as well as a second receiver and a second pulse shaper, characterized in that, in order to increase the efficiency of control and simplify operation, it is equipped with a delay line, the first and second inputs of which are connected respectively to the outputs of the second receiver and the second pulse shaper, and the output to the second input of the mixer , as well as by two units of automatic self-monitoring of the health of the channels connected respectively to the first and second inputs of the mixer. / J x, ttttu 1 -J Figg and. one Fig.Z