SU717538A1 - Instrument flexible element - Google Patents

Description

(54) ELASTIC INSTRUMENT ELEMENT

one

The invention relates to instrumentation and can be used in the construction of measuring instruments using the principle of power compensation. ,

Known elastic elements p zibor 1 and 2. :.

However, these elements do not provide temperature compensation for the force developed by the element.

A known elastic element of the device is made of two plate springs made of materials with non-thermal expansion coefficients 3.

However, this element provides thermal compensation in a relatively narrow temperature range.

The purpose of the invention is to improve the accuracy of compensation for changes in the force of an elastic element with temperature. -. .

This is achieved by the fact that in the proposed element the plate springs are made. unequal yo to the length of the generatrix and fastened together along the edges, and their generators are located at an angle to one; each, and the middle of one of these springs is used as one of the outlet ends. Each of the springs can be rylolnen with forming in the form of an angle, and the corner of the generator of the first spring is the point of the first output end. The second end may be the middle of the second spring or the bonded edges of the spring. At the same time, in the first

In the second case, the spring with the longer generatrix is made of a material with a lower coefficient of thermal expansion, and in the second, vice versa.

FIG. 1-4 is a diagram. 5 elements / possible options.

Claims (5)

The elastic element consists of plate springs 1 and 2, which are fastened together by their edges. The type of their connection is determined by the specific design and requirements of the element. If the spring 1 is longer than the spring 2, then the generators of both springs form an angle сС. The center of the spring 1 is used in 5 as the lead end of the elastic element and can be attached, for example, to an adjusting screw 3 that serves to adjust the reduction (force developed by the elastic element). The second end of the elastic element of the mbjet should be the middle of spring 2 (Fig. 1, 3 and 4), or its outer edges (Fig. 2). To the second output end, when using an elastic element in the device, a transducer 4 is usually connected, which is a source of force, balanced by the force of the elastic element. As springs 1 and 2, various plastic types of Euzhins can be used (depending on specific conditions): flat, bowl, ring, conical or similar, split, star-shaped, etc. Spring 1 can be made with forming as an angle when using ver: t№Hbi THIS angle as the outward end of the elastic element, which helps to obtain a larger jkecT bone without increasing the thickness of the Yri spring, this forming spring 2 can be (depending on 6t specific requirements and conditions) eynoy or tangent to Sided not this angle f}. The second spring 2 can also be (FIGS. 3, 4) formed with a generator in the form of an angle Γ. If it is necessary to obtain a nonlinear characteristic of an elastic element or correct the nonlinearity of a spring 2 that has arisen for other reasons, it can be located relative to the spring 1 by the corner of the angle VB .e. between the sides of the angle fb, which provides an increase in stiffness in the course of the compression. Seryodin spring 2 serves as the second output end of the elastic element. At the same time, for thermal compensations, t; Ё ГСОЗдани hp; you: x stress with the sign of the reverse change in the force of the elastic element from, the effect of temperature change, the spring 1 is made of a material with a lower coefficient of thermal expansion than the spring 2. In some cases it is preferable to use the second end of the elastic element external edges of the springs. In this case, on the contrary, the spring 2 is made of a material with a lower coefficient of thermal expansion. At one certain value, the reduction of the temperature change leads to a change in the angle сС. For example, as the temperature rises, the angle ct also increases, which leads to an increase in the force of the elastic element due to internal thermal stresses. This increase in effort is directed; to compensate for the decrease in the force of the elastic element due to the decrease in the value of the modulus of elasticity of its materials for temperature control. When the temperature decreases, the effect of temperature is the opposite. When the compression of the elastic element changes, the value of the angle is correspondingly changed, which leads to a change in the kinematic relations inside the elastic element. For example, with increasing reduction, the oC angle becomes smaller and, consequently, the kinematic coupling ratio between the springs 1, 2 increases. As a result, with the same temperature change, the change in the magnitude of this angle from the internal thermal stress also increases. By choosing a specific value for the rigidity angle oC of the entire elastic element, taking into account all the other parameters and conditions assumed by a particular design, it is possible to compensate and force the elastic element to vary in temperature over the entire range of adjustment of the amount of reduction, i.e. element .. The proposed elastic element, due to the absence of the need for additional temperature compensators or thermostating devices, allows to increase the accuracy and reliability of p Work to increase the range of operating temperatures, reduce the size and weight of the devices in which it is used. Claim 1. The elastic element of the device, containing two plate springs made of materials with different coefficients of thermal expansion, is due to the fact that in order to improve the accuracy of compensation for changes in the force of an elastic element: as the temperature changes, the plate the springs are unequal along the length of the generators and fastened to each other along the edges; in order to do this, their generators are angled to one another, and the middle of one of these is used as one of the output ends of the element. Ruzhin. 2. The elastic element of the apparatus according to claim 1, characterized in that in it the first of the leaf springs is formed with the forming in the form of an angle with the top at the location of the output end. 3. An element of the appliance according to claim 2, which is characterized by the fact that the second plate spring is made with an angle pattern. 4. The element of the device on PP. 1, 2 or 3, characterized in that in it the second outlet condensate is the middle of the second leaf spring, and the spring with the longer forming length is made of a material with a lower coefficient of thermal expansion. 5. The element of the device on PP. 1 and 2, or 3, characterized in that as the second output end, bonded edges of the plate-like pruzkin are used, and springs with a shorter forming length are made of a material with a lower thermal expansion coefficient. Sources of information taken during the examination 1. Andreeva L.E. Elastic elements of devices, M., 1962. 2.Patent UK No. i: i05.77l, cl. G 1 L, publ. 1968. 3.Patent of the UK # 1.323.827, c. 1 L, published 1973. 0 IP - ////// T Chig. one // X //// / / i Figg .lf.