Air-cooled steam turbine generator stator junction box

Abstract

The utility model provides a stator junction box of an air-cooled steam turbine generator. The stator junction box comprises a box body and a junction box cover, a rubber sealing strip is attached to the first end of the box body, and the junction box cover covers the first end of the box body and is pressed on the rubber sealing strip; the second end of the box body is fixedly connected with a bottom plate; fixed steel plates are fixedly connected to four corners close to the bottom plate; at least two brackets are arranged on the bottom plate; a wire inlet hole and a wire outlet hole are formed in the side wall of the box body; a wiring terminal strip is mounted on the bracket; a stator winding wire of the air-cooled steam turbine generator, a bearing bush temperature induction circuit, a bearing oil outlet quantity induction circuit, a generator inlet wire and a generator outlet wire are respectively connected to the wiring terminal strip. The sealing performance of the junction box is improved, the lower end of the junction box is provided with the wire inlet hole, the upper end of the junction box is provided with the wire outlet hole, dust tightness can be better, and the junction box has waterproof performance.

Description

Technical Field

[0001] The utility model belongs to the technical field of air-cooled steam turbine generators, in particular to a stator terminal box of an air-cooled steam turbine generator. Background Art

[0002] Air-cooled steam turbine generators use forced air flow as a heat source carrier to achieve the purpose of heat dissipation. Air-cooled steam turbine generators are mainly composed of rotors, stators, bearings, lubrication systems, cooling systems, etc. The rotor is the rotating part of the motor, the stator is the fixed part, the bearings are used to support the rotor, and the lubrication system and cooling system provide lubrication and cooling for the rotor and bearings respectively.

[0003] When the wires on the rotor rotate in the magnetic field, electrons flow, generating an electric current. This induces an electromotive force in the coil, generating electricity.

[0004] Air-cooled steam turbine generators generally monitor operating parameters during operation, and usually a junction box is configured to meet the wiring needs of the monitoring process. The current junction box has weak sealing, resulting in poor dust and water resistance, which affects the use of the junction box. Utility Model Content

[0005] The utility model provides an air-cooled steam turbine generator stator terminal box, which can meet the requirements of dustproof and waterproof and meet the use needs.

[0006] The stator terminal box comprises: a box body and a terminal box cover; a rubber sealing strip is attached to the first end of the box body, and the terminal box cover is covered to the first end of the box body and pressed on the rubber sealing strip;

[0007] The second end of the box body is fixedly connected with the bottom plate;

[0008] The four corners close to the bottom plate are fixedly connected with fixed steel plates;

[0009] At least two brackets are arranged on the bottom plate;

[0010] A wire inlet hole and a wire outlet hole are provided on the side wall of the box body;

[0011] A wiring terminal block is installed on the bracket;

[0012] The air-cooled steam turbine generator stator winding current detection circuit, the bearing temperature sensing circuit, the bearing oil output sensing circuit, the generator input line and the generator output line are respectively connected to the terminal block.

[0013] It should be further explained that the rubber sealing strip is made of EPDM rubber, the model of the rubber sealing strip is 15*4, and the contact surface between the rubber sealing strip and the junction box cover is coated with TS515 flat sealant.

[0014] Further, it should be noted that support angle plates are fixedly connected to the four corners of the box body.

[0015] Further, it should be noted that a plurality of wire inlet holes and a plurality of wire outlet holes are provided on the side wall of the box body; DPJ hose connectors are respectively arranged on the wire inlet holes and the wire outlet holes. Fixing holes are provided on the fixing steel plate.

[0016] Further, it should be noted that the box body is made of stainless steel plate, or carbon steel plate, or galvanized steel plate.

[0017] Further, it should be noted that the bottom plate and the box body are connected by welding.

[0018] Further, it should be noted that the bracket is in a U shape, and both ends of the bracket are connected to the bottom plate by welding; a plurality of connection holes are provided on the bracket.

[0019] From the above technical solutions, it can be seen that the present utility model has the following advantages:

[0020] The junction box provided by the present utility model is divided into two parts: a box body and a junction box cover, and is installed on the stator casing. The rubber sealing strip between the box body and the junction box cover is ethylene propylene diene monomer rubber, and a plane sealant TS515 is applied to all contact surfaces of the rubber sealing strip to enhance the sealing. DPJ hose connectors are respectively arranged on the wire inlet holes and the wire outlet holes, increasing the sealing performance of the junction box. The lower end of the junction box is the wire inlet hole, and the upper end is the wire outlet hole, which can better prevent dust and also has waterproof performance. The protection grade of the hose connector is high, up to IP66. Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required in the description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is the front view of the stator junction box of an air-cooled steam turbine generator;

[0023] Figure 2 is Figure 1 the view from direction A in

[0024] Figure 3 is the schematic diagram of the stator junction box of an air-cooled steam turbine generator.

[0025] Description of the Reference Numerals:

[0026] 1. Support angle plate, 2. Bracket, 3. Fixing steel plate, 4. Bottom plate, 5. Box body, 6. Rubber sealing strip, 7. Junction box cover. Detailed Embodiments

[0027] In order to make the objectives, features, and advantages of the present utility model more obvious and understandable, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the specific embodiments. Obviously, the embodiments described below are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of this patent.

[0028] The air-cooled turbogenerator stator terminal box provided by the present utility model includes: a box body 5 and a terminal box cover 7; the box body 5 can be made of stainless steel plate, or carbon steel plate, or galvanized steel plate.

[0029] A rubber sealing strip 6 is attached to the first end of the box body 5, and the terminal box cover 7 is covered on the first end of the box body 5 and pressed on the rubber sealing strip 6; the rubber sealing strip 6 is made of ethylene propylene diene monomer rubber, the model of the rubber sealing strip 6 is 15*4, and the contact surface between the rubber sealing strip 6 and the terminal box cover 7 is coated with TS515 planar sealant. In this way, the terminal box cover 7 and the box body 5 are bonded through the rubber sealing strip 6, playing a role in sealing the inside of the box body.

[0030] A bottom plate 4 is fixedly connected to the second end of the box body 5; the bottom plate 4 can be made of stainless steel plate, or carbon steel plate, or galvanized steel plate. Here, the bottom plate 4 and the box body 5 can be connected by welding.

[0031] Four fixing steel plates 3 are fixedly connected near the four corners of the bottom plate 4; fixing holes are provided on the fixing steel plates 3. The fixing steel plates 3 play a role in fixing with the stator casing to fix the air-cooled turbogenerator stator terminal box. The fixing method can be fixed by bolts cooperating with the fixing holes, or can be fixed by rivets.

[0032] At least two brackets 2 are provided on the bottom plate 4 of the present utility model; the brackets 2 are in a U shape, and both ends of the brackets 2 are connected to the bottom plate 4 by welding; a plurality of connection holes are provided on the brackets 2. A terminal block is installed on the brackets 2; the stator winding wiring, bearing temperature induction circuit, bearing oil output induction circuit, generator incoming line, and generator outgoing line of the air-cooled turbogenerator are respectively connected to the terminal block.

[0033] A plurality of incoming line holes and a plurality of outgoing line holes are provided on the side wall of the box body 5; DPJ hose connectors are respectively provided on the incoming line holes and the outgoing line holes. The corresponding cables can be wrapped with plastic-coated metal hoses to protect the cables.

[0034] Support angle plates 1 are fixedly connected to the four corner positions of the box body 5 of the present utility model. The support angle plates 1 play a role in supporting the box body 5.

[0035] The junction box provided by the utility model is divided into two parts: a box body 5 and a junction box cover 7, which are installed on the stator housing. The rubber sealing strip 6 between the box body 5 and the junction box cover 7 is EPDM rubber, and all contact surfaces of the rubber sealing strip 6 are coated with flat sealant TS515 to strengthen the seal. The wire inlet and the wire outlet are respectively provided with DPJ hose connectors, which increases the sealing performance of the junction box. The lower end of the junction box is the wire inlet, and the upper end is the wire outlet, which can be better dust-tight and waterproof. The hose connector has a high protection level of up to IP66. The junction box is made of stainless steel plate or galvanized plate, with strong corrosion resistance and good overall performance. It is easy to make by welding connection, and the structure is light and strong.

[0036] When a certain element or layer of the air-cooled steam turbine generator stator terminal box provided by the utility model is said to be "on" another element or layer, "connected" or "coupled" to another element or layer, it may be directly on another element or layer, directly connected or coupled to the other element or layer, or there may be an intermediate element or layer. On the contrary, when a certain element is said to be "directly on" another element or layer, "directly connected" or "directly coupled" to another element or layer, there is no intermediate element or layer. Similar numbers in all drawings indicate similar elements. As used herein, the term "and / or" includes any and all combinations of one or more of the relevant listed items.

[0037] The terms "first", "second", "third", "fourth", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects if they exist, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0038] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An air-cooled steam turbine generator stator terminal box, characterized in that: Comprising: A box body (5) and a junction box cover (7); a rubber sealing strip (6) is attached to the first end of the box body (5), and the junction box cover (7) is covered on the first end of the box body (5) and pressed on the rubber sealing strip (6); A bottom plate (4) is fixedly connected to the second end of the box body (5); Fixed steel plates (3) are fixedly connected at the four corner positions close to the bottom plate (4); At least two brackets (2) are arranged on the bottom plate (4); Inlet holes and outlet holes are formed in the side wall of the box body (5); A terminal block is installed on the bracket (2); The stator winding current detection circuit, bearing bush temperature induction circuit, bearing oil output induction circuit, generator inlet wire, and generator outlet wire of the air-cooled turbo generator are respectively connected to the terminal block.

2. The stator junction box of the air-cooled turbo generator according to claim 1, characterized in that The rubber sealing strip (6) is made of ethylene propylene diene monomer rubber, and the contact surface between the rubber sealing strip (6) and the junction box cover (7) is coated with TS515 planar sealant.

3. The stator junction box of the air-cooled turbo generator according to claim 1, characterized in that Support angle plates (1) are fixedly connected at the four corner positions of the box body (5).

4. The stator junction box of the air-cooled turbo generator according to claim 1, characterized in that A plurality of inlet holes and a plurality of outlet holes are formed in the side wall of the box body (5); DPJ hose connectors are respectively arranged on the inlet holes and the outlet holes.

5. The stator junction box of the air-cooled turbo generator according to claim 1, characterized in that Fixing holes are formed in the fixed steel plates (3).

6. The stator junction box of the air-cooled turbo generator according to claim 1, characterized in that The box body (5) is made of stainless steel plate, or carbon steel plate, or galvanized steel plate.

7. The stator junction box of the air-cooled turbo generator according to claim 1, characterized in that The bottom plate (4) and the box body (5) are connected by welding.

8. The stator junction box of the air-cooled turbo generator according to claim 1, characterized in that The bracket (2) is in a U shape, and the two ends of the bracket (2) are connected to the bottom plate (4) by welding; A plurality of connection holes are formed in the bracket (2).

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