Thrust bearing temperature sensing line wiring structure of steam extraction and condensation type steam turbine

Abstract

The utility model discloses a wiring structure for a temperature sensing wire of a thrust bearing of an extraction and condensing steam turbine. The wiring structure comprises an S-shaped threading pipe which passes through a threading hole of a threading fixing plate, the interior of the S-shaped threading pipe is hollow to form a threading channel of a temperature sensing wire; the S-shaped threading pipe is provided with a wire inlet and a wire outlet, and the elevation of the wire inlet is lower than that of the wire outlet. According to the wiring structure, the S-shaped threading pipe is used for prolonging the length of the sensing wire inlet and outlet pipe, lubricating oil carried by a thrust pad sensing wire of the bearing box is driven to naturally fall into the bearing box under the action of gravity, the lubricating oil is prevented from leaking out of a cylinder body, the potential safety hazard problem caused by environmental pollution is avoided, and the service life of the bearing box is prolonged. The equipment safety coefficient is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of process modification of thrust bearing temperature sensing line for extraction condensing steam turbines, and particularly to a wiring structure for the thrust bearing temperature sensing line of extraction condensing steam turbines. Background Technology

[0002] The thrust bearing of the C4.5-C3.43 / 0.5 type extraction condensing steam turbine consists of eight thrust bearing pads and eight temperature sensing wires. These wires are led out through wiring holes on the side of the front bearing housing. During normal operation, the operating pressure of the main oil pump causes lubricating oil in the bearing housing to leak out of the cylinder body through the wiring holes, resulting in oil leakage from the temperature sensing wires. This oil contamination at the thrust bearing pad terminals leads to conductivity, affecting data transmission and the operation of the unit's protection devices. Furthermore, the high ambient temperature of the steam turbine accelerates the aging of the sensing wires, and oil leakage during high-temperature operation poses a significant fire safety hazard to the unit.

[0003] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a wiring structure for the temperature sensing wire of the thrust bearing of an extraction condensing steam turbine. Utility Model Content

[0004] The purpose of this invention is to provide a wiring structure for the temperature sensing wire of the thrust bearing of a steam extraction condensing turbine. This wiring structure uses an S-shaped conduit to extend the length of the inlet and outlet pipes of the sensing wire and drives the lubricating oil carried by the thrust bearing sensing wire in the bearing housing to fall back into the bearing housing naturally under the action of gravity, thus preventing the lubricating oil from leaking out of the cylinder body, avoiding the safety hazards caused by environmental pollution, and improving the safety factor of the equipment.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] This utility model discloses a wiring structure for the temperature sensing wire of the thrust bearing of an extraction condensing steam turbine. The wiring structure is integrated into the wiring fixing plate of the bearing housing. The wiring structure includes:

[0007] An S-shaped conduit passing through the threading hole of the threading fixing plate;

[0008] The hollow interior of the S-shaped conduit serves as the channel for the temperature sensing wire.

[0009] The S-shaped conduit has an inlet and an outlet, and the elevation of the inlet is lower than that of the outlet.

[0010] Furthermore, the threading fixing plate has a threading hole on one side and an observation hole on the other side;

[0011] The opening size of the threading hole is the same as that of the observation hole;

[0012] The opening size of the threading hole matches the outer diameter of the corresponding position of the S-shaped threading tube.

[0013] Furthermore, the S-shaped conduit includes:

[0014] intermediate pipe; and

[0015] The bearing housing outer conduit and the bearing housing inner conduit are respectively formed at both ends of the intermediate tube;

[0016] The outer conduit of the bearing housing is connected to the intermediate pipe via a bend, and the inner conduit of the bearing housing is connected to the intermediate pipe via a bend.

[0017] Furthermore, the outer conduit of the bearing housing extends vertically upward, and the inner conduit of the bearing housing extends vertically downward.

[0018] The wiring structure for the temperature sensing line of the thrust bearing in an extraction condensing steam turbine provided by this utility model has the following beneficial effects:

[0019] The wiring structure of this utility model uses an S-shaped conduit to extend the length of the inlet and outlet pipes of the sensor wire, and drives the lubricating oil carried by the sensor wire of the thrust pad of the bearing housing to fall back into the bearing housing naturally under the action of gravity, avoiding the leakage of lubricating oil out of the cylinder body, avoiding the safety hazards caused by environmental pollution, and improving the safety factor of the equipment. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 This is a schematic diagram of the wiring structure of the temperature sensing line of the thrust bearing of the extraction condensing steam turbine disclosed in the embodiments of this application.

[0022] Figure 2 This is a front view of the wiring fixing plate of the temperature sensing wire wiring structure of the thrust bearing of the extraction condensing steam turbine disclosed in the embodiments of this application.

[0023] Explanation of reference numerals in the attached figures:

[0024] 1. Cable guide plate; 2. S-shaped cable conduit;

[0025] 101. Threading hole; 102. Observation hole;

[0026] 201. Intermediate tube; 202. Outer conduit of bearing housing; 203. Inner conduit of bearing housing; 204. Bend; 205. Outlet; 206. Inlet. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0028] See Figures 1 to 2 As shown;

[0029] This embodiment discloses a wiring structure for a temperature sensing wire of a thrust bearing in an extraction condensing steam turbine. This wiring structure is integrated onto the wiring fixing plate 1 of the bearing housing. The wiring structure includes:

[0030] The S-shaped conduit 2 passes through the conduit hole 101 of the conduit fixing plate 1;

[0031] The hollow interior of the S-shaped conduit 2 serves as the conduit channel for the temperature sensing wire.

[0032] The S-type conduit 2 has an inlet 206 and an outlet 205, and the elevation of the inlet 206 is lower than the elevation of the outlet 205.

[0033] Specifically, this embodiment discloses a wiring structure for the temperature sensing wire of a turbine thrust bearing. First, the original wiring fixing plate 1 is improved by removing the original wiring conduit and installing an S-shaped wiring conduit 2 inside the wiring hole 101 of the wiring fixing plate 1. The S-shaped wiring conduit 2 in this embodiment not only lengthens the wiring channel but also ensures a height difference between the inner and outer ends of the bearing housing. Specifically, the inner end extends downwards, while the outer end extends upwards. This allows the lubricating oil carried by the thrust bearing sensing wire to naturally fall back into the bearing housing under gravity, effectively preventing lubricating oil leakage outside the cylinder.

[0034] Preferably, in this embodiment, a threading hole 101 is provided on one side of the threading fixing plate 1, and an observation hole 102 is provided on the other side of the threading fixing plate 1;

[0035] The opening size of the wire hole 101 is the same as that of the observation hole 102;

[0036] The opening size of the wire hole 101 matches the outer diameter of the corresponding position of the S-shaped wire conduit 2.

[0037] In this embodiment, the S-shaped conduit 2 includes:

[0038] Intermediate tube 201; and

[0039] The bearing housing outer side conduit 202 and the bearing housing inner side conduit 203 are respectively formed at both ends of the intermediate tube 201;

[0040] The outer conduit 202 of the bearing housing is connected to the intermediate pipe 201 through the bend 204, and the inner conduit 203 of the bearing housing is connected to the intermediate pipe 201 through the bend 204.

[0041] Based on the basic principle of lubricating oil flowing back to the bearing housing under the action of gravity, in this embodiment, the outer conduit 202 of the bearing housing extends vertically upward, and the inner conduit 203 of the bearing housing extends vertically downward.

[0042] The size of the conduit in this embodiment can be selected according to actual wiring requirements. It extends the length of the inlet and outlet pipes of the sensor line, independently installs the sensor line terminal box, changes the distribution of the wiring connection lines, and solves the problems of lubricating oil leaking out of the cylinder body and polluting the environment, and flowing along the temperature sensor line to the PLC cabinet, which causes safety hazards. The S-shaped conduit structure in this embodiment is simple, has low requirements for processing and manufacturing, and is easy to implement.

[0043] The wiring structure for the temperature sensing line of the thrust bearing in an extraction condensing steam turbine provided by this utility model has the following beneficial effects:

[0044] The wiring structure of this utility model utilizes an S-shaped conduit 2 to extend the length of the inlet and outlet pipes of the sensor wire, and drives the lubricating oil carried by the sensor wire of the thrust pad of the bearing housing to fall back into the bearing housing naturally under the action of gravity, thereby preventing the lubricating oil from leaking out of the cylinder body, avoiding the safety hazards caused by environmental pollution, and improving the safety factor of the equipment.

[0045] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A wiring structure for the temperature sensing line of the thrust bearing of an extraction condensing steam turbine, characterized in that, The wiring structure is integrated on the wiring fixing plate (1) of the bearing housing, and the wiring structure includes: S-shaped conduit (2) passing through the conduit hole (101) of the conduit fixing plate (1); The hollow interior of the S-shaped conduit (2) serves as the conduit channel for the temperature sensing wire. The S-shaped conduit (2) has an inlet (206) and an outlet (205), and the elevation of the inlet (206) is lower than the elevation of the outlet (205).

2. The wiring structure for the temperature sensing line of the thrust bearing of an extraction condensing steam turbine according to claim 1, characterized in that, The threading fixing plate (1) has a threading hole (101) on one side and an observation hole (102) on the other side. The opening size of the threading hole (101) is the same as that of the observation hole (102); The opening size of the threading hole (101) matches the outer diameter of the corresponding position of the S-shaped threading tube (2).

3. The wiring structure for the temperature sensing line of the thrust bearing of an extraction condensing steam turbine according to claim 2, characterized in that, The S-shaped conduit (2) includes: Intermediate tube (201); and The bearing housing outer side conduit (202) and the bearing housing inner side conduit (203) are respectively formed at both ends of the intermediate tube (201); The outer conduit (202) of the bearing housing is connected to the intermediate pipe (201) through a bend (204), and the inner conduit (203) of the bearing housing is connected to the intermediate pipe (201) through a bend (204).

4. The wiring structure for the temperature sensing line of the extraction condensing steam turbine thrust bearing according to claim 3, characterized in that, The outer conduit (202) of the bearing housing extends vertically upward, and the inner conduit (203) of the bearing housing extends vertically downward.

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