RU2418263C1 - Device for control and measurement of linear dimensions - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: device consists of case with reference surfaces, of indicator, of lever hinged on axle adjusted relative to reference surface and on one side interacting with part of controlled position, while on another side interacting with indicator. Also, device consists of a slide and of a handle. The indicator and the axle of the lever are fastened on the case. A hollow guide with a through orifice in a side wall is arranged in centre of the case on the side of end reference surface. The slide with the handle secured on it and projecting through the orifice in the side wall of the case is positioned outside the guide. A hollow pusher with a through orifice in the side wall conjugated with the through orifice in the guide is positioned inside the guide. Additionally, the pusher is spring loaded to the slide, the slide is spring loaded to the case, while the arm of the lever interacting with the part is inserted in conjugated orifices of the guide and the pusher.

EFFECT: easy to use and compact device facilitating efficient control of gaps in assembly units under condition of restricted access.

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Description

The invention relates to measuring equipment and is intended to control linear dimensions in conditions of limited access.

The device can be used in various fields of technology when assembling and installing machine components containing parts with a given axial clearance.

In particular, the device is relevant for gas centrifuges in the measurement and control of the gap between the ferromagnetic rotor sleeve and the fixed magnet mounted on the cover, between the stator and the drive disk, before the damper is installed. Before installing the damper on the assembled centrifuge assembly, consisting of a housing with a cover and an engine stator, it is necessary to check the gap between the ferromagnetic bushing and the fixed magnet by the position of the support needle installed in the lower part of the rotor relative to the end base surface of the stator in the extreme axial fixed positions of the rotor, and at When measuring, applying a load to the needle is not allowed. These measurements must be carried out with high accuracy and, at the same time, be limited by limited access to combine the base surfaces of the stator and the measuring device, under which it is also necessary to create a second fixed rotor position during the measurement process.

There are various indicator devices for monitoring parts in hard-to-reach places, using special levers of various lengths and configurations [http://delta-grup.ru/bibliot/9k/11.htm, fig. 9a, 9b, 9c - from the book: Albanian P .P. and other Tools and tooling for locksmiths. Leningrad, "Engineering", 1969]. When measuring, the base surface of the housing of the indicator device is associated with the measured surface of the part. Devices allow reconciling surfaces in hard to reach places, but do not provide control of gaps and backlashes.

There is also known a device for controlling the linear size of parts using a lever mechanism and a slider that allows the measuring device to move relative to the measured part, adopted as a prototype [utility model description to patent RU 78303 U1, G01B 5/24, publ. November 20, 2008]. The device allows you to measure the position of the end surface of the measured part relative to the base surface.

However, there are often situations when it is also impossible to measure the movement or backlash of a part in an assembly in an inaccessible place, for example, in a gas centrifuge using this device.

The present invention solves the problem of creating a small-sized measuring device that provides, with minimal time, high quality measurement of two rotor needle positions set relative to the base surface in a gas centrifuge located in a place inaccessible to the measuring device.

The technical result obtained by using the invention consists in the possibility of high-performance control of axial clearances in the assembly units, in particular in a gas centrifuge, as well as clearances and backlash of parts in other devices in conditions of limited access.

The specified technical result is achieved by the fact that in the device for monitoring and measuring linear dimensions, comprising a housing with base surfaces, an indicator pivotally mounted on the axis of the lever having the ability to adjust the position of the axis relative to the base surface and interacting on one side with the part, the position of which is subject to control and on the other hand with an indicator, slider and knob, the following differences are introduced. The indicator and the axis of the lever are fixed on the housing, in the center of the housing on the side of the end base surface there is a hollow guide with a through hole in the side wall, the slider with a handle fixed on it and protruding through the housing holes is located outside the guide, inside the guide there is a hollow pusher with a through hole in a side wall that is compatible with the through hole in the guide, while the pusher is spring-loaded to the slider, the slider is spring-loaded to the body, and the lever arm interacting with the part is distributed laid in the aligned holes of the guide and pusher.

The installation in the housing of a hollow spring-loaded pusher connected with the slider handles provides the possibility of axial movement of the rotor to the extreme positions, and placement of the lever arm interacting with the rotor needle (i.e., the part whose position is to be controlled) in the compatible lateral openings of the pusher and guide housing, allows you to quickly and with high accuracy to measure two positions of the rotor.

The invention is illustrated by drawings on the example of a device for checking the gap between a ferromagnetic sleeve and a fixed magnet by the position of the support needle installed in the lower part of the gas centrifuge rotor relative to the end face of the stator in the extreme axial fixed positions of the rotor with the condition that the load is not applied to the needle.

Figure 1 shows the design of the device in the position of taking readings in the lowermost position of the slider and pusher (before moving the rotor to the upper position).

Figure 2 - design of the device in the position of taking readings in the extreme upper position of the slider and pusher (after moving the rotor to the upper position).

The device according to the invention comprises a housing 1 with a cylindrical 2 and an end 3 base surfaces. Concentric to the surface 2, a guide 4 is made with an opening 5 in the side wall. An indicator 6 with an extension insert 7 and an axis 8 of the lever 9 are fixed in the housing 1. In the guide 4 there is a hollow pusher 10 with an opening 11 in the side wall. The pusher 10 through the spring 12 is connected with the slider 13 with the handles fixed on it 14. The slider 13 through the spring 15 is connected with the housing 1.

In the manufacturing process, the device is calibrated according to installation measures to the dimensions corresponding to the protrusion of the rotor needle relative to the stator end face in accordance with the requirements of the technical documentation in the first and second positions of the rotor using the regulating gasket 16. As a result, the position of the axis 8 of the lever 9 relative to the base surface 3 and equality of shoulders of the lever is provided.

The device works as follows.

The position of the rotor support needle relative to the end base surface of the stator is controlled when the rotor axis is vertical. The housing 1 of the previously calibrated device is inserted into the stator of the device until the base surfaces (2, 3) of the device come into contact with the corresponding base surfaces of the stator. In this case, the rotor needle is in the cavity of the pusher 4 and is in contact with the horizontal arm of the lever 9.

In the first (lower) position of the rotor (Fig. 1), the protrusion of the needle of the rotor relative to the end surface of the stator is measured, and the indicator scale is set to zero.

Then using the handles 14 move the slider 13 up. The slider 13 and the pusher 10, pressed by the spring 12 with an effort greater than the weight of the rotor, together rise to touch the pusher 10 with the lower part of the rotor and the rotor rises to the stop in the upper cover of the centrifuge. The movement of the pusher is stopped, and the movement of the slider 13 continues until it stops at the lower end of the guide 4 of the housing 1. In this case, the spring 12 is compressed and a gap 17 is created between the pusher 10 and the slider 13. Thus, the rotor is fixed by the spring 12 in the upper extreme position (Fig. 2 ), at which indicator 2 is taken.

The difference in the indicator readings in the two positions of the rotor (Figs. 1 and 2) is the amount of displacement of the rotor, respectively equal to the controlled axial clearance between the ferromagnetic sleeve and the magnet in the centrifuge assembly. After taking the readings of the indicator 2, the slider 13 with the handles 14 by the spring 15 returns to its original position, and the pusher 10 with the spring 12 is pressed against the slider 13.

Claims (1)

A device for monitoring and measuring linear dimensions, comprising a housing with base surfaces, an indicator, a lever pivotally mounted on an axis, having the ability to adjust the position of the axis relative to the base surface and interacting on one side with a part whose position is to be controlled and on the other with an indicator, a slider and a handle, characterized in that the indicator and the axis of the lever are mounted on the housing, in the center of the housing on the side of the end base surface there is a hollow guide with a through hole in the sides wall, the slider with a handle fixed to it and protruding through the hole in the side wall of the housing is located outside the guide, inside which there is a hollow pusher with a through hole in the side wall, compatible with the through hole in the guide, while the pusher is spring-loaded to the slider, the slider is spring-loaded to case, and the lever arm interacting with the part is located in the aligned holes of the guide and pusher.

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