SU1631764A1 - Temperature compensating device for stabilizing control points - Google Patents

Abstract

The invention can be used in industrial construction in the structures of attachment points of products that do not allow their position in space to change with sharp fluctuations in temperature. The goal — improving reliability and expanding operational capabilities — is achieved in that the carrier rod (HC) 1 of the thermal compensating element in the device has a movable nozzle 2 with supports 8.9 on the working surface. The stops 10, successively located on the lateral surface of the rod 3, allow the movable nozzle 2 to be rigidly fixed at different levels of HC 1. The installation of the product to be thermally stabilized is carried out on supporting pads 11 rigidly connected to the rod 6 of the corresponding double-lever pair. The rod is driven by the rod 5 through the bearing assembly 7. The coefficient of linear expansion of the material of the rod is greater than that of the material of the supporting rod 1. 2 h .. p. f-ly, 4 ill. with SS / 05 GO 1 C & J

Description

The invention relates to industrial construction, in particular, to devices for compensating for changes in geometric dimensions, and can be used in the structures of attachment points of products, for example, in supports of elements that prevent changes in position in space caused by sudden temperature fluctuations.

The aim of the invention is to increase reliability and enhance operational capabilities.

FIG. 1 shows a device for thermal compensation of stabilization of reference points, general view; figure 2 is the same, top view; on league. 3 - bearing unit of double-lever truss; in fig. 4 is a diagram for determining the lengths of the temperature compensating elements of the temperature compensation device for stabilizing the reference points.

The thermal compensation device for stabilizing the support points contains a supporting rod 1 of a temperature compensating element, a nozzle 2, a rod 3, a fastening assembly 4, rods 5 and 6, a bearing assembly 7, supports 8 and 9 arranged in groups, stops 10, a supporting platform 11, clamps 12 nozzles 2.

The bearing assembly 7 comprises a bearing housing 13 and rolling guides 14.

The nozzle 2 is a universal movable structure mounted on a supporting rod 1, for example, on a shaft of commercially manufactured reinforced concrete piles of various grades. The attachment of the attachment 2 to the supporting rod 1 is performed with the help of several special clamps 12, which ensure their rigid connection at a given level. The device contains additional rods 15 and 16, a bearing assembly 17, a support pad 18, symmetrical with respect to the main truss.

Rods 3 made of a material with a linear thermal expansion coefficient, a large coefficient of linear thermal expansion of the supporting rod 1 and rigidly connected to it in the upper part with the help of a mounting unit are used to drive double-lever symmetric pairs located on the opposite side working surfaces of the nozzle 2. 4. On the side of the working part

0

five

0

five

0

five

0

five

0

five

the rod 3 is installed a series of successive stops 10, used depending on the position of the nozzle 2 on the supporting rod 1. Installation of the product to be thermally stabilized is carried out on support platforms 11 rigidly connected to the rod 6 of the corresponding double-lever. Noah pairs. In turn, the rod 6 is driven by the rod 5 through the bearing assembly 7.

The presence of several supports 8 and 9 arranged horizontally and vertically, respectively, allows the rods 5 and 6 to be rearranged, achieving the required accuracy of thermal compensation depending on the operating conditions.

The lengths of the elements of the thermal compensation device, namely, the length of the supporting rod 1, the length of the rod 3, the length of the rods 5 and 6 of each double-lever pair, and also the coordinates of the position of the supports 8 and 9, with known coefficients of linear thermal expansion of the supporting rod 1 and v of the rod 3 are interconnected by the following relationship (Fig. 4):

y-1) (U-1) () +

Ü I OS X, X

+ - 1,

x2 where 1 is the length of the rod 3 from the place

mounting the free end of the rod 3 on the supporting rod 1 to the stop 10 connected to the rods 5, m; L is the total length of the supporting rod

1m;

- coefficient of linear temperature expansion of the rod 3;

pЈ is the coefficient of linear temperature expansion of the supporting rod 1, and, 1 | - rod length 5, m; 1-2. rod length 6, m; x (is the distance from the rod 3 to

supports 8, on which the rod 5 is installed, m; x - distance from rod 3 to

support 9, on which is mounted the rod 6, m.

To ensure the relative movement of the rods 5 and 6, a bearing unit 7 was used. The design of the joint provides for the free movement of the rod 6 relative to

R

3 1ft j

the rod 5 (inside the housing 13 along the rolling guide 14) arising from the operation of the lever system.

The temperature compensation device for stabilizing the reference points works as follows.

After installation and fastening of the supporting rod 1, installation of the nozzle 2 on its upper part is carried out in accordance with the known height of the thermostatted element supported on the support pads 11, 18. Depending on the ratio of the length of the supporting rod to the external temperature, and the length of the rod 3 , also subject to external temperature, and also taking into account the coefficient of their linear temperature expansion, rods 5, 15 and 6, 16 are mounted on the corresponding supports 8 and 9, characterized by differently depending on the total value of the movement of the support pads 11, 11a from the action of the rod 3 relative to the movable nozzle 2. The corresponding stop 10 of the rod 3 rigidly fixed with the upper end to the bearing rod 1 in the attachment point 4 is engaged with the rods 5.15 of the double-lever par. Installation of a product is made on the support pads 11.18 of a temperature-compensating device, which prevents any possible oscillations during operation caused by a change in the external temperature.

The constancy of the position of the support pads 11 is achieved by the fact that the vertical movement of the carrier rod 1, caused by temperature fluctuations, is compensated for by the vertical movement of the rod 3 carried out in mutually opposite directions.

In the process of movement, the rod 3 through the anvil 10 acts on the rods 5.15, forcing them to change their position, resulting in rotation relative to the supports 8. This change in the position of the rods 5.15 leads to a corresponding change in the position of the rods - 6.16, which in proportional rotation relative to the supports 9, and, as a result, the movement of the supports of the pads 11, 18. As all changes in the length of the supporting rod 1, the rod 3, as well as the rotations of the rods 5,15 and 6,16 occur one 7646

temporarily, the position of the support pads 11,18, and therefore, the thermostatically controlled element as a whole, remains unchanged.

Claims (3)

1. Thermal compensation device for JQ stabilization of reference points, containing thermal compensating elements made of materials with different coefficients of thermal linear expansion in the form of multi-length 15 supporting rods and a system of rods, which are successively interconnected at their ends with the formation of thermal deformations of the truss located on the supporting rod in the plane of action, the supporting platforms located on the truss and the bearing assembly, due to the fact that in order to increase reliability and expand 25 operational capabilities, the carrier rod is equipped with a movable nozzle with support groups located on its working surface, which is installed as a carrier rod with 30 by the possibility of rigid attachment on it at different levels along it, the rod of one of the thermal compensating elements with a large coefficient of linear temperature expansion 35 rhenium, than the coefficient of linear temperature expansion of the supporting rod, is provided with stops, rigidly and evenly fixed on it, on one part of its length - on the working 40 part from one end, placed on the supporting rod and rigidly connected to it by its other free end, and its working part is placed on the working surface 45 of the moving attachment of the supporting rod, and the truss is formed by interconnected one ends by means of a bearing assembly by connecting rods mounted on 50 one of the supports of the respective groups of supports of the working surface of the moving nozzle with the possibility of their free ends interacting with one stop of the rod with stops and with the supporting 55 platform, respectively, with the formation of a double-lever pair, and the coordinates of the location of the supports on the movable nozzle, the length of the supporting rod, the rod with stops and the rods of the double-lever truss pair are in the following relationship ar (e.mu muik-1K u.1f 2, where 1 is the length of the rod with stops from the place of attachment of its free end on the supporting rod to its abutment associated with the corresponding rod of the double-lever pair, m; L is the total length of the supporting rod, MJ , 0Ј - coefficients of linear temperature expansion of the rod with the stops and the supporting rod, respectively, in this case: R main groups of supports, with additional groups of supports attached to the working surface of the movable the nozzles are symmetrical to their respective main support groups relative to the geometric center of the working surface of the moving nozzle, and the rods of the additional truss rods. Mounted on the corresponding symmetric main bearings of the additional supports of the working surface of the movable nozzle, symmetrically with their respective core rods, with respect to the working part of the rod with stops, with the possibility of their free ends interacting with an additional mounting platform and with one stop of the rod with stops, respectively, forming an additional two-lever couples. x ". 1., lg - the length of the rods of the double-lever truss pair, respectively, m; distances from the rod with stops to the supports of the working surface of the mobile nozzle, on which the rods of the double-lever truss pair are installed, respectively, m. 2. The device according to p. rods, identical to the main rods farm, the movable nozzle is equipped with additional groups of supports that are identical 3. The device according to PP. 1 and 2, T are characterized by the fact that the supports of each group are installed along one straight line, and the supports of groups are located on charge-perpendicular lines, with one group of supports placed on the periphery of the working surface of the movable nozzle, on the line parallel to the working part of the rod with stops, and other groups of supports in the central part of the working surface of the movable nozzle, on the line, perpendicular to the working part of the rod with stops. / 18 / 7 FIG. Z r / f ffSf r / f-fff SrSfiV / Јbir / f f // V FIG. four