SU1103314A1 - Transducer for measuring brush pressure on collector of electric machine - Google Patents

Abstract

1. SENSOR FOR MEASURING PRESSURE AND BRUSH FOR MANIFOLD electric machine comprising a housing adapted to be mounted between the brush and the brush box in the box spring brush box having zaplechniki on which rests a measuring timber provided with a primary transducers constituting an electrical half bridge and terminals for connection to measuring apparatus, characterized in that, in order to simplify the construction of reducing the weight and dimensions, the measuring beam is made in the form of an isosceles trihedral prism, on the top of which is supported by the brush spring. 2. The sensor according to claim 1, characterized in that the spring of the brush holder, at the point of contact with the prism, is electrically insulated. (L

Description

The invention relates to electrical engineering in the field of creating a device for measuring the pressure of brushes on a collector of an electric machine and is intended to operate under conditions of operation of machines, their investigation and repair.

A known sensor for measuring the pressure of the brush on the collector of an electric machine, comprising a housing designed to be installed between the brush and the spring in the window of the brush holder, an elastic measuring bar on two supports, supported on it through two supports by the cross bar, the sensing force from the spring of the brush holder, and primary converters, mounted on the timber between the supports traverse 1.

A disadvantage of the known sensor is the complexity of the design, since it contains a pressure traverse that senses and transmits the spring force through the reference tide at the center of the applied force, and two supports that transmit the force to the measuring bar. Traverse has a certain stiffness and increases the size of the sensor in height.

Closest to the present invention, there is a sensor for measuring the brush pressure on the collector of an electric machine, comprising a housing adapted to be installed between the brush and the spring of the brush holder in the brush holder window, having shoulders on which the measuring bar, equipped with the primary half-bridge, and terminals for connection to measuring equipment 2.

A disadvantage of the known device is the complexity of the sensor design, caused by the presence of a pressure pin and guides for it, which also increases the weight and dimensions of the device.

The purpose of the invention is to simplify the design, reduce weight and size.

The goal is achieved by the fact that in the sensor for measuring the pressure of the brush on the collector of an electric machine, comprising a housing to be installed between the brush and the spring of the brush holder in the window of the brush holder, which has shoulders supported by a measuring bar equipped with primary converters that form an electric half-gap , and conclusions for connection to the measuring equipment, the measuring bar is made in the form of an isosceles three-gage prism, on top of which a brush-containing spring rests tel.

Ping; 1 brush holder in place (with Ili: and OY equipped with electric 1gch) ling.

FIG. 1 shows a device, a vertical section; in fig. 2 shows section A-A in FIG. one; in fig. 3 - plot of the moments and resistances of the measuring bar. The sensor includes a housing 1 with shoulders

2, the measuring bar 3, made in the form of a triangular prism, one of the edges 4 of which is on the longitudinal axis c, and the symmetry of the body 1 and serves to support the spring 5 of the brush holder 6, in the window of which the body 1 is installed between the spring 5 and the brush 7. Primary The transducers 8 are mounted on the beam 3 by inter-poles, which for it are the shoulders 2. The primary transducers 8 form an electric half-bridge and have insulated terminals (not shown) for connection to the measuring equipment. The beam 3 is held in the housing against falling out due to the projections -9. The spring 5 at the point of contact with the prism can be provided with electrical insulation 10.

The sensor works as follows. A brush 7 is installed in the window of the brush holder b, placed on an electric machine or test bench, and the body of the tared sensor is mounted on it. The terminals of the brush 7 and the primary converters 8 are located in the window of the brush holder 6 and are connected from the brush 7 to the brush holder b, and from the primary converters 8 to the measuring electric bridge with an appliance connected to its diagonal (not shown). The pressure P (Fig. 3a) from the spring 5 of the brush holder 6 is transmitted directly to the measuring bar 3, and through its supports-shoulders 2 in the housing 1 to the working brush 7. The primary converters 8 installed on the bar 3 are tested in place with the bar Bending deformation M, E (Fig. 3b, c) change their ohmic resistance and cause an imbalance of the electric bridge, and the device captures static, and on the working

0 machine and dynamic load brush on the collector.

The effectiveness of the use of the invention is created by simplifying the design, improving the measurement accuracy of the static and dynamic loads of the brush.

5 to the collector by eliminating the pressure pin and guides, i.e., reducing the friction pairs in the supports, versatility, i.e., expanding the potential capabilities of the sensor, allowing it to be used on various sizes of brush holders of electric machines by reducing its mass and dimensions and increased reliability in operation in terms of vibrations, shock loads and strong magnetic fields.

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Claims (2)

1. SENSOR FOR MEASURING THE PRESSURE OF THE BRUSH ON THE COLLECTOR OF THE ELECTRIC MACHINE, comprising a housing intended for installation between the brush and the spring of the brush holder in the window of the brush holder, having shoulders on which a measuring beam is provided, equipped with primary transducers forming an electric half-bridge, and leads for connection to measuring equipment, characterized in that, in order to simplify the design of reducing weight and dimensions, the measuring beam is made in the form of an isosceles trihedral prism, on tops in which the spring of the brush holder rests. 2. The sensor according to π. 1, characterized in that the spring of the brush holder at the point of contact with the prism is provided with electrical insulation. SU „„ 1103314