Installation clamp for eccentric sensor of steam turbine

Abstract

Provided is a steam turbine eccentric sensor installation clamp. At present, other sensor mounting clamps are only provided with a simple mounting sleeve, the rigidity is not enough, and the sensor clamping is not firm enough. Especially, the thread of the original clamp is thicker, one end is directly fixed in the junction box, and the fixed end is used for adjusting the mounting gap of the sensor, so that the space is very narrow. The device comprises an inner sleeve, an outer sleeve and an adjusting sleeve, the adjusting sleeve is in threaded connection in the outer sleeve, the inner sleeve is in threaded connection with the adjusting sleeve, the outer sleeve is in threaded connection with an outer sleeve locking nut, and the inner sleeve is in threaded connection with an inner sleeve locking nut. The tool is used for installing the turbine eccentric sensor.

Description

TECHNICAL FIELD

[0001] The utility model relates to a steam turbine eccentric sensor installation fixture. BACKGROUND

[0002] The LZC140.7-13.0 / 1.2 / 0.493 type steam turbine produced by Shanghai Steam Turbine Factory is not designed with eccentric measuring points. The measurement of the eccentricity of the steam turbine is crucial to ensure the normal operation of the steam turbine. Firstly, if the rotor has eccentricity, it will cause friction and wear of the stator, thereby affecting the normal operation of the unit; secondly, it can timely find the bending of the steam turbine main shaft, avoid shaft vibration and prevent the collision of moving and static parts, thereby avoiding unit damage accidents; thirdly, it can timely find the wear condition of the bearing and the load size, thereby performing necessary maintenance and maintenance to ensure the long-term stable operation of the steam turbine. Therefore, it is necessary to design and add reliable eccentric measuring instruments. The installation of the sensor needs to design a firm, reliable and easy-to-adjust installation fixture,

[0003] The current other sensor installation fixtures only have a simple installation sleeve, and the rigidity is not enough, and the sensor is not firmly clamped. In particular, the original fixture has thick threads, and one end is directly fixed in the junction box. The space is very small, and the wrench has no rotation space, so it is very difficult to adjust. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a steam turbine eccentric sensor installation fixture to solve the above-mentioned technical problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A steam turbine eccentric sensor installation fixture, which comprises an inner sleeve, an outer sleeve and an adjusting sleeve, the adjusting sleeve is threadedly connected in the outer sleeve, the inner sleeve is threadedly connected with the adjusting sleeve, the outer sleeve is provided with an outer sleeve locking nut, and the inner sleeve is provided with an inner sleeve locking nut.

[0007] The outer sleeve locking nut of the steam turbine eccentric sensor installation fixture is a cylindrical nut, and a plurality of grooves are arranged on the outer side surface of the cylindrical nut.

[0008] The inner sleeve of the steam turbine eccentric sensor installation fixture is provided with a junction box fixing nut at the top.

[0009] The outer sleeve of the steam turbine eccentric sensor installation fixture is provided with a sealing washer. ADVANTAGEOUS EFFECTS

[0010] 1. This utility model has excellent adjustability. During the installation and adjustment of the sensor, the measurement gap can be easily and precisely adjusted, improving the efficiency of the staff.

[0011] 2. This utility model allows the sensor to be installed entirely in the mounting hole at the end of the inner sleeve, with the sensor lead passing through the inner sleeve to the outside of the turbine. Therefore, the overall structure provides high protection for the sensor and prevents damage. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Appendix Figure 2 This is a top view of the outer sleeve locking nut;

[0014] Appendix Figure 3 This is the front view of the outer tube locking nut;

[0015] Appendix Figure 4 This is the front view of the outer tube;

[0016] Appendix Figure 5 It is attached Figure 4 View from direction B;

[0017] Appendix Figure 6 This is a schematic diagram of the inner sleeve structure;

[0018] Appendix Figure 7 It is attached Figure 6 Sectional view of section AA;

[0019] In the diagram: 1. Junction box fixing nut; 2. Inner sleeve locking nut; 3. Inner sleeve; 4. Adjusting sleeve; 5. Outer sleeve; 6. Outer sleeve locking nut; 7. Sensor mounting hole; 8. Groove; 9. Sealing gasket. Detailed Implementation

[0020] Reference Figures 1-7 A turbine eccentricity sensor mounting fixture comprises an inner sleeve 3, an outer sleeve 5, and an adjusting sleeve 4. The adjusting sleeve is threaded inside the outer sleeve, and the inner sleeve is threaded to the adjusting sleeve. An outer sleeve locking nut 6 is threaded onto the outer sleeve, and an inner sleeve locking nut 2 is threaded onto the inner sleeve.

[0021] The turbine eccentric sensor mounting fixture is described above, wherein the outer sleeve locking nut is a cylindrical nut, and its outer side has multiple evenly arranged grooves 8.

[0022] The turbine eccentric sensor mounting fixture has a junction box fixing nut 1 threadedly connected to the top of the inner sleeve.

[0023] The outer sleeve is sleeved with a sealing washer 9.

[0024] The whole set of eccentric sensor clamp is made of 304 stainless steel and is processed by machine tool. The clamp is mainly composed of three parts: outer sleeve, inner sleeve and adjusting sleeve. The outer sleeve is directly fixed on the bearing cover of the steam turbine, and the sealing washer is used to prevent the leakage of lubricating oil, and then the outer sleeve is locked by the locking nut. The adjusting sleeve is screwed into the outer sleeve and locked. After the inner sleeve is screwed into the adjusting sleeve, the position of the inner sleeve can be adjusted through the precise internal thread on the adjusting sleeve, so that the measurement gap between the eccentric sensor installed on the inner sleeve and the steam turbine shaft can meet the technical requirements, and finally the inner sleeve is locked by the locking nut. The terminal box fixing nut at the head of the inner sleeve is used to install and fix the terminal box of the eccentric sensor.

Claims

1. A turbine eccentricity sensor mounting fixture, characterized in that: It consists of an inner sleeve, an outer sleeve, and an adjusting sleeve. The adjusting sleeve is threaded inside the outer sleeve, and the inner sleeve is threaded to the adjusting sleeve. An outer sleeve locking nut is threaded onto the outer sleeve, and an inner sleeve locking nut is threaded onto the inner sleeve.

2. The turbine eccentric sensor mounting fixture according to claim 1, characterized in that: The outer sleeve locking nut is a cylindrical nut with multiple evenly arranged grooves on its outer surface.

3. The turbine eccentric sensor mounting fixture according to claim 2, characterized in that: The top of the inner sleeve is threaded with a junction box fixing nut.

4. The turbine eccentric sensor mounting fixture according to claim 3, characterized in that: The outer tube is fitted with a sealing gasket.

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