SU1394243A1 - Device for checking tractive force of electromagnet - Google Patents

Abstract

The invention relates to electrical equipment and is intended to control the nominal tractive force of electromagnets. The purpose of the invention is to improve the accuracy of control. The use of a pneumatic loading mechanism in the form of a pneumatic cylinder with a piston allows the device to be quickly rebuilt to control electromagnets having different tractive forces by changing the magnitude of the control pressure. 1 pe.

Description

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The invention relates to electrical apparatuses) and is intended to control the nominal pulling force of electromagnets,

The purpose of the invention is to improve the accuracy of control of the nominal traction force of an electromagnet.

The drawing shows the device, the overall appearance.

In the housing 1, a sensing element 3 connected by a hinge mechanism 4 to a piston 5 of a pneumatic cylinder is mounted on one and the ends of the rod 2. Between the piston 5 and the sensing element 3 there is a spring 6, which serves to return the piston 5 to its original position. The other end of the rod 2 is connected to the core 7 of the controlled electromagnet 8. At the place of pressing the sensitive element 3 to the case, a contact 9 is installed, which serves to fix the achievement of the nominal tractive force by the electromagnet 8. Electromagnet B has a spring 10 that returns the bark 7 to its original position after removing the voltage from it, and a fixed core 11. To supply the control design pressure of the air required for jamming and pressing the sensitive element 3, there is a pressure regulator 12 with a pressure relief valve 13 installed in the inlet line of the pressure regulator 12. The control and correction of the counteracting force developed by the sensitive element 3, is achieved by changing the magnitude of the normal pressing force of the sensitive element 3 to the body 1 due to the change in the magnitude of the air pressure supplied to the cavity under the piston 5.

The device works as follows.

Before starting the control, air is supplied at a design pressure from the pressure regulator 12 into the cavity formed by the walls of the housing 1 and the piston 5. The piston 5, acting on the hinge mechanism 4, causes the wedging of the sensing element 3 and presses it against the walls of the housing 1 with a certain force. In this case, the piston 5 compresses the spring 6. Insert the test electromagnet 8 into the grooves of the housing 1 and connect the bark 7 with the rod 2, Apply a voltage to the electromagnet 8. The resulting pulling

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force lcr 7 through the rod 2 acts on the sensing element 3. When the nominal thrust force is reached and with a further increase in thrust force, the slip element 3 begins to slip relative to the walls of the housing 1, as a result of which contact 9 is triggered and on a light board (not shown) Signal Fit appears. At the same time, a voltage is applied to the electropneumatic valve 13, which depresses the air pressure in the inlet line and above the piston 5. The spring 6, straightening, returns the piston 5 to its original position and pushes the sensitive element 3 from the walls of the housing 1. When the core 7 stops into the fixed core 11, the spring 10 is compressed. After relieving the voltage from the electronic. Romagnita 8 spring 10, straightening, returns the measles 7 and the stem 2 with the sensitive element 3 and the device is pressed to its original position. If, when the voltage is applied to the electromagnet 8, the resulting tractive force is less than the nominal, the sensitive element 3 does not slip relative to the walls of the housing 1, the contact 9 does not work, as a result of which the Marriage signal appears on the light display.

The proposed device makes it possible to control the dependence of the thrust force of an electromagnet on the magnitude of the movement of the core for electromagnets of any type, including with a large course of the core, by changing the magnitude of the normal pressing force of the sensing element 3 to the body 1.

Claims (1)

Invention Formula A device for controlling the electromagnet control force, comprising a housing, a loading mechanism with a sensitive element, characterized in that, in order to increase the control accuracy of the nominal pulling force, it uses a pneumatic loading mechanism containing a pneumatic cylinder, the indicating element of the loading mechanism is made in the form of two half-rings installed in the housing with the possibility of longitudinal movement and connected through an additional hinge mechanism, made in the form of two levers, tanovlenii under GHS 3J394243 scrap to each other, with the piston indicated by acting through an additional piston rod of the pneumatic cylinder, and the electromagnetically coupled mechanism specified for the measles is intended for the nit.