SU881549A1 - Device for measuring pressure - Google Patents

Description

I

The invention relates to instrumentation, namely, vibration-proof and impact-resistant pressure devices.

Pressure measuring instruments are known whose design provides for the reduction of vibration and impact resistance D 3.

However, they either have vibration strength only in a given frequency range, or have low vibration strength due to the occurrence of reactions from inertial forces in the hinges, or are structurally complex.

Closest to the invention is a switch manometer, which is provided with an additional Wurdon spring, identical to the first one and located skew-symmetrically relative to it, while the springs are fixed on a common base, their free ends are hinged to the rigid balancer arm; I have a fixed point of support, and the total reduced moment of inertia of both springs, the bansing lever and all moving parts is zero T2.

However, in the known device, the vibration and impact resistance are insufficient due to the occurrence of reactions from inertial forces in the gaps of the hinges. The rigid attachment of the working ends of the springs with the balance lever is impossible due to the fact that the instantaneous centers of rotation of the springs do not coincide.

The purpose of the invention is to increase the vibration and impact resistance ost.

The goal is achieved by the fact that in the known device the fixed ends of the springs are fixed symmetrically with respect to the axis of rotation of the balance lever, and the free ends of the springs are rigidly connected to the corresponding ends of the balance lever.

The drawing shows a schematic of a vibration and impact resistant pressure gauge.

The device scheme consists of a holder 1 to which two identical springs 2 and 3 are attached, located symmetrically with respect to the instantaneous center of rotation. The loose ends of the springs are rigidly connected to; the balance lever 4, which rotates with respect to the instantaneous center of rotation 0. The balance lever 4 transfers its rotation to the arrow 5 moving along the scale 6,

The device works as follows.

The measured pressure P enters the springs 2 and 3, which, when cranked, rotate the balance lever 4, transmitting the rotation to the arrow 5 moving along the scale 6. In case of impact or vibration, the resulting moments of reduced inertia (J pryzhin relative to the instantaneous center of rotation O equal in magnitude but opposite in direction. The total moment of inertia is zero, with the result that the hinge 7 in the instantaneous center of rotation O is completely unloaded.

Since in the proposed device design there are no hinged connections of the working ends of the springs with the balance lever, there are no reactions from the inertial forces in the hinges, which

significantly increases the vibro - and shock resistance of the device.

In addition, the proposed device, in comparison with the known one, is simpler in terms of its design, and has enhanced durability and measurement accuracy.

Claims (1)

Invention Formula A device for measuring pressure, containing two identical manometric springs, mounted on a balance lever with: an axis of rotation connected to the free ends of the springs, characterized in that, in order to increase the vibration and impact resistance, therein the fixed ends of the springs are fixed symmetrically with respect to the axis of rotation of the balance lever, and the free ends of the springs are connected to the corresponding ends of the balance lever hard. Sources of information taken into account in the examination 1, USSR Copyright Certificate W 491054, class, Q 01 L 7 / 04,29,03,74, 2, USSR Author's Certificate No. 427253, class G 01 L 7/04, 27.03.72 (prototype),