Steam turbine generator stator temperature measuring device

Abstract

The utility model discloses a steam turbine generator stator temperature measuring device, and belongs to the technical field of steam turbine generators. A steam turbine generator stator temperature measuring device comprises an element bottom plate and an insulating bottom plate. A placement groove is formed in the element bottom plate; the thin film platinum resistor chip is fixedly connected to the groove wall of the placing groove; the element pressing plate is fixedly connected to the element bottom plate and seals the placing groove; the mounting groove is formed in the side wall of the insulating bottom plate; the side wall of the element pressing plate is fixedly connected with the groove wall of the mounting groove, a limiting piece is arranged in the mounting groove, and the element bottom plate and the element pressing plate are limited through the limiting piece; the mounting groove is filled with epoxy resin; the insulating cover plate is fixedly connected to the side wall of the insulating bottom plate and seals the mounting groove; one end of the temperature measuring lead is mounted on the film platinum resistor chip and penetrates through the insulating bottom plate; and the polytetrafluoroethylene sheath is wrapped on the temperature measuring lead. The steam turbine generator stator temperature measuring device has the advantages of being simple in structure, low in cost and convenient to manufacture.

Description

Technical Field

[0001] The present application relates to the technical field of steam turbine generators, and in particular to a temperature measuring device for a steam turbine generator stator. Background Art

[0002] A generator is a motor that converts mechanical energy into electrical energy, usually driven by a steam turbine, a water turbine or an internal combustion engine. Generators are divided into two categories: DC generators and AC generators, the latter of which can be divided into synchronous generators and asynchronous generators.

[0003] A steam turbine generator refers to a generator driven by a steam turbine. The superheated steam generated by the boiler enters the steam turbine and expands to do work, causing the blades to rotate and drive the generator to generate electricity. The waste steam after work is sent back to the boiler for recycling through the condenser, circulating water pump, condensate pump, feed water heating device, etc.

[0004] When the steam turbine generator is running, the temperature of the stator core and stator coil is the most important basis for reflecting whether the generator is running normally. Therefore, in the design and manufacturing process of the generator, it is necessary to arrange temperature measuring resistors at different phases and positions of the stator core and stator coil and connect them to the automatic monitoring system to monitor the temperature of the generator during operation. When the temperature of the generator exceeds the warning value, the system will automatically alarm and take measures such as shutdown.

[0005] A steam turbine generator stator temperature measuring device is now provided. Utility Model Content

[0006] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0007] In order to solve the technical problems mentioned in the above background technology section, some embodiments of the present application provide a steam turbine generator stator temperature measurement device, including: a component bottom plate and an insulating bottom plate;

[0008] It is characterized in that: a placement groove is provided on the component bottom plate;

[0009] A steam turbine generator stator temperature measuring device also includes:

[0010] The thin film platinum resistor chip is fixedly connected to the wall of the placement slot;

[0011] A component pressing plate, fixedly connected to the component bottom plate and closing the placement slot;

[0012] A mounting groove is provided on the side wall of the insulating base plate;

[0013] The side wall of the component pressing plate is fixedly connected to the groove wall of the installation groove, and a limiting member is provided in the installation groove, through which the component bottom plate and the component pressing plate are limited; the installation groove is filled with epoxy resin;

[0014] An insulating cover plate is fixedly connected to the side wall of the insulating base plate and closes the mounting groove;

[0015] A temperature measuring wire, one end of which is mounted on a thin film platinum resistor chip and passes through an insulating bottom plate;

[0016] Polytetrafluoroethylene sheath, wrapped around the temperature measuring wire;

[0017] The alkali-free glass fiber tape layer is half-wrapped outside the insulating base plate and the insulating cover plate;

[0018] Among them, the alkali-free glass fiber tape layer is brushed with epoxy curing agent and semiconductor paint.

[0019] Furthermore, the limiting member includes:

[0020] A first limiting groove is provided on the side wall of the insulating bottom plate;

[0021] A first limiting block is fixedly connected to the side wall of the component pressing plate and is clamped in the first limiting groove;

[0022] A second limiting groove is provided on the side wall of the component bottom plate;

[0023] The second limiting block is fixedly connected to the side wall of the insulating cover plate and is clamped in the second limiting groove.

[0024] Furthermore, the first limiting groove is an arc-shaped groove, and a plurality of first limiting grooves are provided and are arranged on the side wall of the insulating bottom plate at equal intervals.

[0025] Furthermore, the first limiting block is an arc-shaped bar, a plurality of first limiting blocks are provided and fixedly connected to the side wall of the component pressure plate at equal intervals, and each first limiting block is clamped in any first limiting groove.

[0026] Furthermore, the second limiting groove is a square groove, and a plurality of second limiting grooves are provided and are arranged on the side wall of the component bottom plate at equal intervals.

[0027] Furthermore, the second limiting block is a square block, a plurality of second limiting blocks are provided and fixedly connected to the side wall of the insulating cover plate at equal intervals, and each second limiting block is clamped in any second limiting groove.

[0028] Furthermore, a wire outlet groove is provided on the insulating bottom plate, and one end of the temperature measuring wire passes through the wire outlet groove and extends out of the outside of one end of the alkali-free glass fiber tape layer.

[0029] The beneficial effect of the present application is that it provides a steam turbine generator stator temperature measuring device with a simple structure, low cost and easy manufacture. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0031] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0032] In the attached picture:

[0033] Figure 1 is an overall schematic diagram according to an embodiment of the present application;

[0034] Figure 2 yes Figure 1 Schematic cross-sectional view of AA in the figure;

[0035] Figure 3 yes Figure 2 Enlarged view of part B.

[0036] Reference numerals:

[0037] 11. Thin film platinum resistor chip; 12. Component base plate; 13. Component pressure plate; 14. Insulation base plate; 15. Insulation cover plate; 16. Polytetrafluoroethylene sheath; 17. Alkali-free glass fiber tape layer; 18. Installation slot; 19. Placement slot; 20. First limit slot; 21. First limit block; 22. Second limit slot; 23. Second limit block; 24. Temperature measuring wire. DETAILED DESCRIPTION

[0038] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0039] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0040] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0041] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0042] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0043] Reference Figure 1-Figure 3 A temperature measuring device for a steam turbine generator stator includes: an element bottom plate 12, an insulating bottom plate 14, a thin film platinum resistor chip 11, an element pressing plate 13, an insulating cover plate 15, a temperature measuring wire 24, a polytetrafluoroethylene sheath 16, and an alkali-free glass fiber tape layer 17.

[0044] The component base plate 12 is provided with a placement groove 19, the thin film platinum resistor chip 11 is adhered to the groove wall of the placement groove 19, and the component pressing plate 13 is adhered to the component base plate 12 and closes the placement groove 19. The side wall of the insulating base plate 14 is provided with a mounting groove 18, the side wall of the component pressing plate 13 is adhered to the groove wall of the mounting groove 18, and the mounting groove 18 is filled with epoxy resin. The insulating cover plate 15 is fixedly connected to the side wall of the insulating base plate 14 and closes the mounting groove 18; the insulating base plate 14 is provided with an outlet groove, one end of the temperature measuring wire 24 passes through the outlet groove and extends out of one end of the alkali-free glass fiber tape layer 17, one end of the temperature measuring wire 24 is installed on the thin film platinum resistor chip 11 and passes through the insulating base plate 14, and the polytetrafluoroethylene sheath 16 is wrapped on the temperature measuring wire 24. The alkali-free glass fiber tape layer 17 is half-wrapped outside the insulating bottom plate 14 and the insulating cover plate 15 , and the alkali-free glass fiber tape layer 17 is brushed with epoxy curing agent and semiconductor paint.

[0045] A limiting member is disposed in the mounting groove 18 , and the element bottom plate 12 and the element pressing plate 13 are limited by the limiting member. The limiting member includes a first limiting block 21 and a second limiting block 23 .

[0046] The first limiting groove 20 is an arc-shaped groove, and a plurality of the first limiting grooves 20 are provided and are evenly spaced on the side wall of the insulating bottom plate 14. The first limiting block 21 is an arc-shaped bar, and a plurality of the first limiting blocks 21 are provided and are evenly spaced and fixedly connected to the side wall of the component pressing plate 13, and each first limiting block 21 is snapped into any first limiting groove 20. The second limiting groove 22 is a square groove, and a plurality of the second limiting grooves 22 are provided and are evenly spaced on the side wall of the component bottom plate 12. The second limiting block 23 is a square block, and a plurality of the second limiting blocks 23 are provided and are evenly spaced and fixedly connected to the side wall of the insulating cover plate 15, and each second limiting block 23 is snapped into any second limiting groove 22.

[0047] Working or installation process:

[0048] The temperature measuring wire 24 is welded to the welding point on the thin film platinum resistor chip 11, the groove wall of the placement groove 19 is coated with high temperature resistant glue, and the thin film platinum resistor chip 11 is placed in the placement groove 19, so that the groove wall of the placement groove 19 and the thin film platinum resistor chip 11 are bonded by the high temperature resistant glue, and the side wall of the component pressing plate 13 is coated with high temperature resistant glue, so that the side wall of the component pressing plate 13 and the thin film platinum resistor chip 11 are bonded, and the component pressing plate 13 seals the notch of the placement groove 19 and the thin film platinum resistor chip 11, so as to form a temperature measuring element, and the combined temperature measuring element is placed in the installation groove 18, and the multiple first limit blocks 21 on the component pressing plate 13 are connected to the multiple first limit blocks 21 on the groove wall of the installation groove 18. The limiting grooves 20 are correspondingly connected to each other, and epoxy resin is filled in the installation groove 18. When the epoxy resin is flush with the notch of the installation groove 18, high temperature resistant glue is applied on the side wall of the insulating cover plate 15 and the insulating cover plate 15 is bonded to the insulating base plate 14, so that the insulating cover plate 15 closes the notch of the installation groove 18, and a plurality of second limiting blocks 23 are inserted into each second limiting groove 22 respectively, the temperature measuring wire 24 is led out from the outlet groove, and the outer layer of the temperature measuring wire 24 led out from the outlet groove is wrapped with a polytetrafluoroethylene sheath 16, and the outer layer of the insulating base plate 14 and the insulating cover plate 15 is half-overlapped with an alkali-free glass fiber tape layer 17, and the outside of the alkali-free glass fiber tape layer 17 is coated with epoxy curing agent and semiconductor paint.

[0049] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A steam turbine generator stator temperature measuring device, comprising: A component base plate (12) and an insulating base plate (14); The feature is that: a placement groove (19) is provided on the element bottom plate (12); The steam turbine generator stator temperature measuring device also includes: A thin-film platinum resistor chip (11) is fixedly connected to the wall of the placement groove (19); An element pressing plate (13) fixedly connected to the element bottom plate (12) and closing the placement groove (19); A mounting groove (18) is provided on a side wall of the insulating bottom plate (14); The side wall of the component pressing plate (13) is fixedly connected to the groove wall of the installation groove (18); a limiting member is provided in the installation groove (18); the component bottom plate (12) and the component pressing plate (13) are limited by the limiting member; the installation groove (18) is filled with epoxy resin; An insulating cover plate (15) fixedly connected to the side wall of the insulating base plate (14) and closing the mounting groove (18); A temperature measuring wire (24), one end of which is mounted on the thin film platinum resistor chip (11) and passes through the insulating bottom plate (14); A polytetrafluoroethylene sheath (16) wrapped around the temperature measuring wire (24); An alkali-free glass fiber tape layer (17) is half-wrapped outside the insulating bottom plate (14) and the insulating cover plate (15); Wherein, the alkali-free glass fiber tape layer (17) is coated with epoxy curing agent and semiconductor paint.

2. A steam turbine generator stator temperature measuring device according to claim 1, characterized in that: The limiting member comprises: A first limiting groove (20) is provided on a side wall of the insulating bottom plate (14); A first limiting block (21) is fixedly connected to the side wall of the element pressing plate (13) and is clamped in the first limiting groove (20); A second limiting groove (22) is provided on the side wall of the element bottom plate (12); The second limiting block (23) is fixedly connected to the side wall of the insulating cover plate (15) and is clamped in the second limiting groove (22).

3. A steam turbine generator stator temperature measuring device according to claim 2, characterized in that: The first limiting groove (20) is an arc-shaped groove, and a plurality of the first limiting grooves (20) are provided and are arranged at equal intervals on the side wall of the insulating bottom plate (14).

4. A steam turbine generator stator temperature measuring device according to claim 3, characterized in that: The first limiting block (21) is an arc-shaped bar, and a plurality of the first limiting blocks (21) are provided and fixedly connected to the side wall of the element pressure plate (13) at equal intervals, and each of the first limiting blocks (21) is snap-fitted into any one of the first limiting grooves (20).

5. The steam turbine generator stator temperature measuring device according to claim 2, characterized in that: The second limiting groove (22) is a square groove, and a plurality of the second limiting grooves (22) are arranged at equal intervals on the side wall of the element bottom plate (12).

6. A steam turbine generator stator temperature measuring device according to claim 5, characterized in that: The second limit block (23) is a square block, and a plurality of the second limit blocks (23) are provided and fixedly connected to the side wall of the insulating cover plate (15) at equal intervals, and each second limit block (23) is snap-fitted into any one of the second limit grooves (22).

7. The steam turbine generator stator temperature measuring device according to claim 1, characterized in that: The insulating bottom plate (14) is provided with a wire outlet groove, and one end of the temperature measuring wire (24) passes through the wire outlet groove and extends out of the outside of one end of the alkali-free glass fiber tape layer (17).

Images