RU2389123C1 - Device for withdrawal of wedges from electric machine stator slots - Google Patents

Abstract

FIELD: electric engineering.

SUBSTANCE: device comprises body with power cylinder connected to working element in the form of comb, on surface of which there are radial slots provided with ledges that correspond to core slots installed with the possibility of displacement along stator axis and with spacing hydraulic cylinder equipped with supports. Body of device consists of flange, tripod equipped with rolling bearings and guide, at the same time guide is equipped with grip having slots for wedges withdrawal and slots for comb displacement and is connected to spacing hydraulic cylinder and by means of spring is connected to tripod.

EFFECT: improved quality of wedges withdrawal with simultaneous simplification and improved reliability of device.

3 dwg

Description

The invention relates to the electrical industry and can be used in the dismantling and repair of electrical machines.

A device for removing wedges from the grooves of the stators of electric machines is known [Copyright certificate No. 1130961, IPC H02K 15/02].

The device contains a working tool and a drive for moving it. The tool is made in the form of a cylinder, on the generatrix of which the teeth are fixed at a distance corresponding to the groove division of the stator.

Closest to the claimed technical solution is a device for removing wedges from the grooves of the stators of electric machines, comprising a housing, clamps in the form of a frame with a power cylinder and supports, radial grooves are made on the surface of the working head and cutters are installed. The working head is installed in the housing with the ability to move in the direction perpendicular to the axis of the stator [Copyright certificate No. 1403252, IPC H02K 15/02].

The disadvantages of the device for removing wedges from the grooves of the stators of electric machines are the difficulty of observing the parallelism of the longitudinal axes of the stator and the housing of the device, as well as the insufficient rigidity of the node of the device that receives the force of extrusion of the wedges, because the specified node consists of movable elements that provide vertical and horizontal movement of the housing.

The objective of the claimed technical solution is to create a device for removing wedges from the grooves of the stators of electric machines, which allows to improve the quality of extraction of wedges.

The problem is solved in that the device for removing wedges from the grooves of the stators of electric machines contains a housing with a power cylinder connected to a working body made in the form of a comb, on the surface of which there are made radial grooves with protrusions corresponding to grooves of the core mounted for movement along the axis stator, and with a spacer hydraulic cylinder equipped with supports. The housing of the device consists of a flange, a tripod, equipped with rolling bearings and a guide, equipped with a grip with slots for the exit of the wedges and grooves for moving the comb, connected to the expansion hydraulic cylinder and by means of a spring connected with the tripod.

A distinctive feature of the claimed solution is that the housing consists of a flange, a tripod, equipped with rolling bearings and a guide, while the guide is equipped with a grip with slots for wedges and grooves for moving the comb, connected to a spacer cylinder and connected to the tripod by means of a spring. The working body is made in the form of a comb.

In the proposed device for removing wedges from the grooves of the stators of electric machines, the parallelism between the guide and the longitudinal axis of the processed core is achieved automatically when the guide is pressed by the expansion cylinder to the pole core due to the fact that the guide and the hydraulic cylinder rigidly connected to it do not contact the base. The bracket, on which the guide and the power hydraulic cylinder are suspended, is once mounted on a tripod to ensure parallelism of the longitudinal axes of the machined frame of the electric machine, the guide and the power hydraulic cylinder, and this setting does not change in the future. All the force of squeezing out the wedges is perceived by the grip mounted motionless relative to the guide and rigidly fixed on it.

The invention is illustrated by drawings: figure 1 - side view of the device; figure 2 is a view of figure 1 along arrow A; figure 3 is a view of figure 1 along arrow B.

The invention is illustrated by an example of a structural embodiment of the device for removing wedges from the grooves of the stators of electric machines. The device consists of a power hydraulic cylinder 1, which is hung on the bracket 4 of the tripod 5 using an eye 2 and an axis 3. A guide 6 is attached to the flange of the power hydraulic cylinder 1, the grip 7 is fixed at its end. Slots are made along the profile of the workpiece to exit the wedges 8. Using the protrusions 9 formed by the slots for the exit of the wedges 8, the grip 7 when extruding the wedges engages in the core of the pole. Guide 6 contains grooves for moving the slider 10 with a comb for extruding wedges. In addition, the bracket 11 and the cheeks 12 are installed on the guide 6. Through the bracket 11, the guide 6 is spring-loaded with a spring 13 relative to the tripod 5, and through the cheeks 12 and the rolling support 14 it is connected to the spacer cylinder 15, which is mounted on the bracket 16, mounted on tripod 5. When wedges are extruded, the support 17 of the expansion cylinder 15 has the ability to abut against the core of the pole, opposite the core from which the wedges are extruded. Tripod 5 on three rolling bearings 18 is installed in the flange 19, which is rigidly mounted on the skeleton of an electric machine. The eyelet 20 is designed to move the press with a lifting mechanism when it is installed and removed from a horizontally located skeleton of an electric machine. After fixing the flange 19 on the frame, the device should be in its original position for operation. The initial position of the device is shown in figure 1.

A device for extracting wedges from the grooves of the stators of electric machines works as follows. A control valve (not shown) is turned on, supplying oil to the expansion cylinder 15, while the support 17 abuts against the core of the pole opposite to the core being processed, at the same time, the lower rod of the expansion cylinder 15 presses the guide 6 to the processed core through the rolling support 14, the guide is self-centering. After that, the control valve is turned on, supplying oil to the power hydraulic cylinder 1, the movement of the slider 10 with a comb for squeezing out the wedges begins. After the comb rests against the wedges located in the grooves of the core, the movement of the power hydraulic cylinder 1 along with the guide 6 to the right begins (Fig. 1), while the axis 3 and the rolling support 14 move in the grooves of the bracket 4 and cheeks 12, respectively, the spring is compressed 13. After the protrusions 9 of the capture 7 catch on the core, the movement of the power cylinder 1 and the guide 6 to the right stops. The process of extruding wedges from the grooves begins. The extruded wedges 8 pass in the slot between the protrusions 9 and fall into the cavity of the core. After the slider 10 with the comb comes to the extreme left position, the control valve switches the oil flow entering the power hydraulic cylinder 1, the movement of the slider 10 along with the comb to the right begins. At this time, under the action of the spring 13, the power cylinder 1 and the guide 6 are moved to the left, while the axis 3 and the rolling bearing 14 move in the grooves of the bracket 4 and cheeks 12, respectively. When the slider 10 with the comb comes to the extreme right position, the control valve switches the oil flow into the expansion cylinder 15, the support 17 drops down, and the rolling support 14 rises, the guide 6 and the power hydraulic cylinder 1 rotate around axis 3 by the angle necessary to exit the guide 6 from the mesh core.

The skeleton rotator is turned on (not shown), which rotates the skeleton by an angle necessary for processing the next core, while tripod 5 does not rotate, because the rolling bearings 18 are rolled on the inner surface of the rotating flange 19. After installing the guide 6 over the next core, the above operations are repeated.

A device for extracting wedges from the grooves of the stators of electric machines has been introduced into production at the Yekaterinburg Electric Locomotive Repair Plant.

Claims (1)

A device for extracting wedges from the grooves of the stators of electric machines, comprising a housing with a power cylinder connected to a working body, on the surface of which there are made radial grooves with protrusions corresponding to grooves of the core mounted for movement along the stator axis, and with a spacer hydraulic cylinder equipped with supports, characterized in that the housing consists of a flange, a tripod, equipped with rolling bearings and a guide, and the guide is equipped with a grip with slots for the exit of the wedges and grooves for moving Nia comb cylinder connected to the spacer and by a spring associated with a tripod, and the actuator is designed as a comb.

Images