Steam turbine brush carrier with wear alarm function

Abstract

The utility model provides a steam turbine brush holder with a wear alarm function, which comprises a base, a carbon brush box is mounted at the bottom end of the base, and a plurality of carbon brushes are mounted at the bottom end of the carbon brush box; a junction box is mounted on the surface of the carbon brush box, a plurality of normally-closed signal switches are mounted in the junction box, a contact switch is mounted at the top end of each normally-closed signal switch, and the contact switches are electrically connected with the normally-closed signal switches; the top end of the carbon brush is provided with a hook, and the surface of the hook is provided with a thimble. One end of an elastic plate is fixed on the side wall of the ejector pin, the other end of the elastic plate is rotatably connected with the side wall of the normally-closed signal switch, and the elastic plate extrudes the surface of the abutting switch. The steam turbine brush holder with the abrasion alarm function has the advantages that the abrasion loss of the carbon brush can be monitored in real time, replacement is prompted through the alarm system when the carbon brush reaches the abrasion service life, and equipment damage caused by excessive abrasion is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to steam turbine generator carbon brush technical field especially, it relates to a steam turbine brush holder with wear alarm function. BACKGROUND

[0002] Steam turbine generator refers to the steam turbine driven generator, and the superheated steam generated by the boiler enters the steam turbine and expands to work, makes the blade rotate and drives the generator to generate electricity, and the waste steam after work is sent back to the boiler by the condenser, circulating water pump, condensate pump, feed water heating device etc. and is used circularly.

[0003] The Chinese patent document of the existing announcement for CN210779409U discloses a carbon brush locking mechanism and brush holder, the carbon brush locking mechanism includes a pressing plate, an operating part and a first elastic element;The pressing plate is provided with a pressure head corresponding to the carbon brush;The pressing plate has a first working position and a second working position, when the pressing plate is in the first working position, the pressure head locks the carbon brush between the pressure head and the inner wall of the carbon brush box, when the pressing plate is in the second working position, the pressure head is separated from the carbon brush to unlock the carbon brush;The operating part can exert an external force on the pressing plate to make the pressing plate in the second working position;The first elastic element can be elastically deformed when the pressing plate is in the second working position, and can restore the deformation to make the pressing plate restore and remain in the first working position after the external force of the operating part is removed.

[0004] The above-mentioned brush holder is usually installed in a closed space, and the wear or even failure of the carbon brush is caused by the long-term contact between the carbon brush and the rotor, in the prior art, the wear state of the carbon brush is usually judged by shutdown maintenance or visual inspection, the wear amount cannot be monitored in real time, sudden failure is easily caused, and the unplanned shutdown maintenance leads to high cost and affects the equipment operation efficiency.

[0005] Therefore, it is necessary to provide a new steam turbine brush holder with wear alarm function to solve the above problems. Utility model content

[0006] The utility model solves the technical problem to provide a steam turbine brush holder with wear alarm function, which can monitor the wear amount of the carbon brush in real time, prompt replacement when the carbon brush reaches the wear life through the alarm system, avoid excessive wear and damage to the equipment.

[0007] To solve the above technical problems, the steam turbine brush holder with wear alarm function provided by the utility model comprises a base, a carbon brush box is installed at the bottom end of the base, and a plurality of carbon brushes are installed at the bottom end of the carbon brush box; a junction box is installed on the surface of the carbon brush box, a plurality of normally closed signal switches are installed in the junction box, a contact switch is installed at the top end of the normally closed signal switch, and the contact switch is electrically connected with the normally closed signal switch; a hook is installed at the top end of the carbon brush, and a thimble is installed on the surface of the hook; one end of an elastic plate is fixed to the side wall of the thimble, and the other end of the elastic plate is rotationally connected to the side wall of the normally closed signal switch, and the elastic plate extrudes the surface of the contact switch.

[0008] Preferably, a handle is rotationally connected to the inside of the base, one end of the handle is connected to an operating part for driving the pressing plate to move, one end of the pressing plate is provided with a plurality of pressing heads, and the pressing heads extrude the side wall of the carbon brush.

[0009] Preferably, one end of the carbon brush box is provided with a plurality of carbon brush grooves, and the carbon brushes are installed in the carbon brush grooves.

[0010] Preferably, a plurality of constant pressure springs are installed on the surface of the carbon brush box, and the constant pressure springs contact the surface of the carbon brush.

[0011] Preferably, wires are installed in the junction box, and the normally closed signal switches are connected in series through the wires.

[0012] Preferably, the number of the carbon brushes, the hook and the normally closed signal switches is the same.

[0013] Compared with the related art, the steam turbine brush holder with wear alarm function has the following beneficial effects:

[0014] The utility model provides a kind of steam turbine brush holder with wear alarm function, the base is installed in steam turbine generator, the constant pressure spring is pressed to the carbon brush, the carbon brush is contacted with the rotor inside steam turbine generator to realize current transmission, with the increase of use time, the end of the carbon brush contacted with rotor gradually wears, the constant pressure spring drives the carbon brush to move in the carbon brush box so that the carbon brush always contacts rotor, facilitate current transmission;When the carbon brush wears during movement, the carbon brush drives the hook, the thimble moves towards the direction of the junction box, the thimble drives the elastic plate to gradually close to the contact switch;When the carbon brush is close to wear to life line and continuously operates, the carbon brush drives the elastic plate to extrude the contact switch, the contact switch is opened to trigger the normally closed signal switch, so that the normally closed signal switch alarms, prompt worker to replace the carbon brush, avoid that the carbon brush is excessively worn and lead to equipment damage. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 A preferred embodiment structure schematic view of the steam turbine brush holder with wear alarm function provided by the utility model;

[0016] Figure 2 For Figure 1 The handle structure schematic view shown in the figure;

[0017] Figure 3 For Figure 1 The carbon brush and constant pressure spring structure schematic view shown in the figure;

[0018] Figure 4 For Figure 1 The wiring box internal structure schematic view shown in the figure;

[0019] Figure 5 For Figure 4 The A place structure enlarged schematic view shown in the figure.

[0020] The figure mark: 1, handle, 2, base, 3, carbon brush box, 31, carbon brush groove, 4, wire, 5, carbon brush, 6, wiring box, 7, hook, 8, constant pressure spring, 9, operating part, 10, pressure head, 11, thimble, 12, normally closed signal switch, 13, elastic plate, 14, abutment switch, 15, pressing plate. Specific implementation

[0021] The utility model will be further explained in connection with the drawings and implementation.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 And Figure 5 , Figure 1 A preferred embodiment structure schematic view of the steam turbine brush holder with wear alarm function provided by the utility model; Figure 2 For Figure 1 The handle structure schematic view shown in the figure; Figure 3 For Figure 1 The carbon brush and constant pressure spring structure schematic view shown in the figure; Figure 4 For Figure 1 The wiring box internal structure schematic view shown in the figure; Figure 5 For Figure 4The structure of A is shown in the enlarged view. The turbine brush holder with wear warning function comprises a base 2, a carbon brush box 3 installed at the bottom end of the base 2, a plurality of carbon brushes 5 installed at the bottom end of the carbon brush box 3, a terminal box 6 installed on the surface of the carbon brush box 3, a plurality of normally closed signal switches 12 installed inside the terminal box 6, a contact switch 14 installed at the top end of the normally closed signal switch 12, and the contact switch 14 is electrically connected between the normally closed signal switch 12. A hook 7 is installed at the top end of the carbon brush 5, and a thimble 11 is installed on the surface of the hook 7. One end of an elastic plate 13 is fixed to the side wall of the thimble 11, and the other end of the elastic plate 13 is rotatably connected to the side wall of the normally closed signal switch 12, and the elastic plate 13 presses the surface of the contact switch 14. The base 2 is installed in the turbine generator, and the constant pressure spring 8 presses the carbon brush 5 to make the carbon brush 5 contact the rotor inside the turbine generator to realize current transmission. As the use time increases, the end of the carbon brush 5 in contact with the rotor gradually wears out, the constant pressure spring 8 pushes the carbon brush 5 to move in the carbon brush box 3 to make the carbon brush 5 always contact the rotor to facilitate current transmission. When the carbon brush 5 wears and moves, the carbon brush 5 drives the hook 7 and the thimble 11 to move towards the terminal box 6, and the thimble 11 drives the elastic plate 13 to gradually approach the contact switch 14. When the carbon brush 5 is close to the end of life and continues to run, the carbon brush 5 drives the elastic plate 13 to press the contact switch 14, the contact switch 14 is opened to trigger the normally closed signal switch 12, the normally closed signal switch 12 is alarmed to prompt workers to replace the carbon brush 5, and to avoid excessive wear of the carbon brush 5 causing damage to the equipment.

[0023] A handle 1 is rotatably connected inside the base 2, one end of the handle 1 is connected to an operating part 9 for driving the pressing plate 15 to move, one end of the pressing plate 15 is provided with a plurality of pressing heads 10, and the pressing heads 10 press the side wall of the carbon brush 5. In order to facilitate the rotation of the handle 1, the pressing heads 10 press and lock the carbon brush 5.

[0024] One end of the carbon brush box 3 is provided with a plurality of carbon brush grooves 31, and the carbon brush 5 is installed inside the carbon brush groove 31. In order to facilitate the replacement of the carbon brush 5 inside the carbon brush box 3.

[0025] A plurality of constant pressure springs 8 are installed on the surface of the carbon brush box 3, and the constant pressure springs 8 press the surface of the carbon brush 5. In order to make the constant pressure spring 8 press the carbon brush 5, the carbon brush 5 contacts the rotor inside the turbine generator.

[0026] The inside of the terminal box 6 is installed with a wire 4, and the normally closed signal switch 12 is connected in series with the wire 4, so as to connect the wire 4 with a pre-warning mechanism, when the normally closed signal switch 12 is turned on, the normally closed signal switch 12 transmits a signal to the pre-warning mechanism, so as to alarm the pre-warning mechanism and remind people to replace the carbon brush 5.

[0027] The number of the carbon brush 5, the hook 7 and the normally closed signal switch 12 is the same, so as to make one normally closed signal switch 12 monitor one carbon brush 5, and make the device suitable for single-hole brush box and multi-hole brush box.

[0028] The above is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, which is made by using the content of the present application specification and drawings, is also included in the patent protection range of the present application.

Claims

1. A turbine brush holder with a wear warning function, characterized in that, Include: The base (2) of the bottom end of the installation of carbon brush box (3), the bottom end of the installation of a plurality of carbon brush (5) of carbon brush box (3); The surface of the carbon brush box (3) is installed with a wiring box (6), a plurality of normally closed signal switch (12) is installed in the wiring box (6), the top end of the normally closed signal switch (12) is installed with a contact switch (14), and the contact switch (14) is electrically connected between the normally closed signal switch (12); The top end of the carbon brush (5) is installed with a hook (7), and the surface of the hook (7) is installed with a thimble (11); One end of the elastic plate (13) is fixed to the side wall of the thimble (11), the other end of the elastic plate (13) is rotatably connected to the side wall of the normally closed signal switch (12), and the elastic plate (13) extrudes the surface of the contact switch (14).

2. The turbine brush holder with a wear alarm function according to claim 1, characterized in that, The inside of the base (2) is rotatably connected with a handle (1), one end of the handle (1) is connected with an operating part (9) for driving the movement of a pressing plate (15); One end of the pressing plate (15) is provided with a plurality of pressing heads (10), and the pressing heads (10) extrude the side wall of the carbon brush (5).

3. The turbine brush holder with a wear alarm function according to claim 1, characterized in that, One end of the carbon brush box (3) is provided with a plurality of carbon brush grooves (31), and the carbon brush (5) is installed in the carbon brush groove (31).

4. The turbine brush holder with a wear alarm function according to claim 1, characterized in that, The surface of the carbon brush box (3) is installed with a plurality of constant pressure springs (8), and the constant pressure springs (8) extrude the surface of the carbon brush (5).

5. The turbine brush holder with a wear alarm function according to claim 1, characterized in that, The inside of the wiring box (6) is installed with a wire (4), and the normally closed signal switch (12) is connected in series through the wire (4).

6. The turbine brush holder with a wear alarm function according to claim 1, characterized in that, The number of carbon brush (5), hook (7) and normally closed signal switch (12) is the same.

Images