CS241796B1 - Apparatus for pressing in and pulling-out of wedges - Google Patents

Abstract

Push and pull devices wedge groove of rotating machine wires especially their stators, it is intended for mounting wedges. It contains a linear force element whose feeders the input is provided with a sensor. This sensor they form an information entry into the recording equipment.

Description

The invention provides a device for pushing and pulling out the wedges of the grooves of the wires of rotating machines, in particular their stators, both during their manufacture and during repairs.

So far, this operation has been carried out manually. Using a hammer, the wedges are driven into the grooves in which they cover the guide rods. The clearance between the guide bar and the groove fills the washer, the sufficient thickness of which is estimated by the resistance of the hammer wedge. The covered guide rod is checked by tapping the hammer on the wedge over its surface. The sound of the guide rods in the groove is then estimated. If the guide rod is warped and diverted from the bottom of the groove and is adjacent to the wedge from below, the tap sound is distorted because it is identical to the tightened guide rod. The non-tightened guide rod is damaged by operation, since its loose fit in the groove does not prevent it from oscillating, resulting in mechanical damage to the insulation.

Alternatively, a force element positioned between the mounting flange attached to the stator housing of the rotating machine is used to push the wedges. On the flange, the force element is aligned parallel to the longitudinal axis of the keyway.

This device achieves a perfect fit of the guide rods to the bottom of the wedge groove and thus evenly tightens all wedges not only in the groove, but also in the whole dynamoelectric machine. The disadvantage, however, remains the complexity of the final control, which consists in subjective evaluation of the sound of a hammer tap on each of the wedges.

This drawback removes the device for pushing and pulling the wedges of the grooves of the wires of the rotating machines, especially their stators. It consists of a linear force element, whose power input is provided with a sensor forming an input to the recording device.

The record obtained from the operation of the device according to the invention serves as a document for inspection by both the accepting inspector and the document for the customer. to determine the quality back in time.

An exemplary embodiment of the device according to the invention for pushing and pulling the wedge grooves of the wires of rotating machines is shown schematically in the attached drawing.

At the front of the stator 5 is mounted a mounting flange 3 on which a linear force element 2 is arranged parallel to the longitudinal axis of the keyway, in which the wedge 1 is seated. The power inlet 4 of the linear force element 2 The information input 7 to the recording device 8 leads from the sensor 6.

By the action of the linear force element 2, the wedges 1 are gradually pushed into the grooves of the stator 5. The resistance placed on the wedge 1 by the washer between the wedge 1 and the guide rod results in an increase in the load at the feed inlet 4 Increased load is indicated by sensor 6 and transferred from it by input 7 to the recording device 8, which will record each wedge 1 ·

Similarly, the device according to the invention can also be used for pulling out the wedges and the obtained record can then be used to evaluate the influence of the operation on the durability of the stiffness of the wedge seating in the groove.

Claims (1)

Device for pushing and pulling wedge grooves of rotating machine wires, especially their stators, comprising a linear force element, characterized in that the power input (4) of the linear force element (2) is provided with a sensor (6) forming an information input (7) to the recording equipment (8).