CN214660368U

CN214660368U - TRT clearance adjustment device

Info

Publication number: CN214660368U
Application number: CN202120943114.5U
Authority: CN
Inventors: 陈一峰; 戴军; 李锋辉
Original assignee: Shanghai Mufan Power Technology Co ltd
Current assignee: Shanghai Mufan Power Technology Co ltd
Priority date: 2021-04-30
Filing date: 2021-04-30
Publication date: 2021-11-09
Anticipated expiration: 2031-04-30

Abstract

The utility model relates to a TRT clearance adjustment device, include: a TRT rotor; a thrust bearing comprising a working surface and a non-working surface opposite one another, the thrust bearing being fixedly connected to the TRT rotor; and the two hydraulic pistons are respectively positioned on the working surface and the non-working surface of the thrust bearing, and the hydraulic pistons push the TRT rotor to displace towards the direction far away from or close to the bearing steel of the unit through the thrust bearing. The utility model discloses a TRT clearance adjustment device when the unit operation in-process because the sound after the short time that results in is greater than the design value that rubs, removes the rotor along the adverse air current direction through hydraulic means with the sound clearance that can make the unit, and then reduces the gas leakage loss between the adjacent two-stage of unit, makes the unit reach higher efficiency and power, brings bigger economic benefits.

Description

TRT clearance adjustment device

Technical Field

The utility model belongs to the technical field of blast furnace top gas residual pressure recovery turbine power generation facility, concretely relates to TRT clearance adjustment device.

Background

The TRT is a blast furnace gas residual pressure recovery turbine power generation device, and the TRT is a device which utilizes the pressure energy and the heat energy of blast furnace top gas to enable the gas to work through a turbine expansion machine to drive a generator to generate power and recover energy.

The TRT rotor is a rigid rotor and consists of movable blades, vane isolating blocks, a main shaft and the like. In the TRT starting process, the rising speed of the temperature of the movable blade is higher than that of the temperature of the cylinder, so that the expansion amount of the movable blade is obviously larger than that of the cylinder, and the phenomenon is more serious when the temperature of the working medium is higher. In order to prevent the friction between the movable blade and the cylinder, the condition of the most severe working condition change must be considered for the design value of the dynamic and static clearance. After the expansion amount of the movable blade reaches the maximum value, the cylinder still continues to expand, so that the dynamic and static gaps are gradually increased, and the TRT efficiency is reduced. Therefore, a certain clearance value is reserved in the design stage, but with the operation of the unit, because the parameter change of the blast furnace gas is severe, the dynamic clearance and the static clearance of the unit are larger than the design value after the unit operates for a short time, and the efficiency of the unit is obviously reduced.

In order to solve the problems, the patent of the invention is provided by CN202011077367.5 filed by patent application No. of patent application, inventor Power engineering Limited company of sending scientific energy, and is named as a multi-stage TRT stator blade inner housing, and the invention mainly adopts the multi-stage structure design to the stator blade inner housing, so that each stage of TRT stator blade has a matched expansion angle; through setting up the first circular arc section and the first-stage quiet leaf spherical surface cooperation of the first-stage section of admitting air, the second circular arc section and the quiet leaf spherical surface cooperation of second grade section of admitting air, and then solved the quiet leaf blade body of TRT and the too big problem in interior casing radial clearance. However, the technical scheme also has the following defects: firstly, the technical scheme adopts a method for matching the second arc section of the air inlet section with the spherical surface of the second-stage stationary blade, which is mainly designed aiming at the structure of the stationary blade and has the problem of processing difficulty; secondly, the technical scheme still can not avoid the problem of dynamic and static rub caused by severe change of blast furnace gas parameters, and the efficiency of the unit is not obviously improved along with the operation of the unit.

SUMMERY OF THE UTILITY MODEL

1. Technical problem to be solved by the utility model

The utility model aims to solve the defect that the dynamic and static clearance is bigger than the design value after the short time that leads to because the sound bump-grinding among the prior art, makes unit efficiency obviously reduce, provide a TRT clearance adjusting device, through removing the rotor along the adverse current direction, make the dynamic and static clearance of unit reduce, just can make the unit reach higher efficiency and power, bring bigger economic benefits.

2. Technical scheme

In order to achieve the above purpose, the utility model provides a technical scheme does:

the utility model discloses a TRT clearance adjustment device, include:

a TRT rotor;

a thrust bearing comprising a working surface and a non-working surface opposite one another, the thrust bearing being fixedly connected to the TRT rotor;

and the two hydraulic pistons are respectively positioned on the working surface and the non-working surface of the thrust bearing, and the hydraulic pistons push the TRT rotor to displace towards the direction far away from or close to the bearing steel of the unit through the thrust bearing.

The preferable technical scheme is as follows:

the TRT clearance adjusting device further comprises a radial displacement sensor, wherein the radial displacement sensor is arranged on the unit bearing steel and is used for detecting the size of a dynamic and static clearance between the turbine movable blade and the unit bearing cylinder.

The TRT clearance adjusting apparatus further includes a lateral displacement sensor, which is disposed on an axial displacement path of the TRT rotor, and is configured to detect an axial position of the TRT rotor.

The TRT clearance adjusting device further comprises a hydraulic oil pump, one oil port of the hydraulic oil pump is communicated with the oil inlet of the hydraulic piston through an oil inlet pipeline, and the other oil port of the hydraulic oil pump is communicated with the oil outlet of the hydraulic piston through an oil return pipeline.

The TRT clearance adjustment device further comprises a filter, and the filter is arranged on an oil inlet pipeline between the hydraulic oil pump and the hydraulic piston.

According to the TRT clearance adjusting device, the oil inlet pipeline is respectively provided with the first flow control valve and the oil inlet electromagnetic valve, and the oil return pipeline is respectively provided with the second flow control valve and the oil return electromagnetic valve.

3. Advantageous effects

Adopt the technical scheme provided by the utility model, compare with prior art, have following beneficial effect:

the utility model discloses a TRT clearance adjustment device when the unit operation in-process because the sound after the short time that results in is greater than the design value that rubs, removes the rotor along the adverse air current direction through hydraulic means with the sound clearance that can make the unit, and then reduces the gas leakage loss between the adjacent two-stage of unit, makes the unit reach higher efficiency and power, brings bigger economic benefits.

Drawings

Fig. 1 is a schematic view of an overall structure of a TRT gap adjusting apparatus according to the present invention;

100, turbine blades; 200. a unit bearing cylinder; 300. a TRT rotor; 400. a thrust bearing; 500. a hydraulic piston; 600. a hydraulic oil pump; 700. a controller; 800. a radial displacement sensor; 900. a lateral displacement sensor.

Detailed Description

In order to facilitate understanding of the invention, the invention will be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which can be embodied in many different forms and are not limited to the embodiments described herein, but which are provided so as to render the disclosure of the invention more thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present; when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present; the terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, the present embodiment provides a TRT clearance adjustment apparatus, which includes a TRT rotor 300, a thrust bearing 400, two hydraulic pistons 500, a radial displacement sensor 800, a lateral displacement sensor 900, a hydraulic oil pump 600, and a filter.

For the TRT rotor 300, the TRT rotor 300 is a rigid rotor and is composed of turbine rotor blades 100 of various stages, a spacer block, a main shaft, and the like, wherein the main shaft is formed by high alloy steel integral forging and precision machining, the turbine rotor blades 100 are mounted on the main shaft, and the spacer block is mounted between the turbine rotor blades 100 of various stages. When the TRT works, blast furnace gas is led out to do work and is converted into kinetic energy to be applied to the turbine movable blade 100, so that the whole TRT rotor 300 rotates, and the rotor drives the engine to rotate together through the coupler to generate electricity.

In this embodiment, the thrust bearing 400 includes a working surface and a non-working surface opposite to each other, the thrust bearing 400 is fixedly connected to the TRT rotor 300, and the thrust bearing 400 is provided in this embodiment to push the TRT rotor 300 through the thrust bearing 400.

Two hydraulic pistons 500 are respectively disposed on the working surface and the non-working surface of the thrust bearing 400, where the working surface and the non-working surface refer to two opposite surfaces relative to the main body of the thrust bearing 400, and the hydraulic pistons 500 push the TRT rotor 300 to displace in a direction away from or close to the bearing steel of the machine through the thrust bearing 400.

Regarding the axial displacement of the TRT rotor 300, there is a safe position for the axial displacement of the TRT rotor 300, and the safe position of the TRT rotor 300 is a position where the TRT rotor 300 does not generate dynamic and static rub with machine bearing steel.

The hydraulic oil pump 600 is connected with the hydraulic piston 500 through a pipeline. Specifically, one oil port of the hydraulic oil pump 600 is communicated with an oil inlet of the hydraulic piston 500 through an oil inlet pipeline, and the other oil port of the hydraulic oil pump 600 is communicated with an oil outlet of the hydraulic piston 500 through an oil return pipeline.

Since the two hydraulic pistons 500 are respectively arranged on the working surface and the non-working surface of the thrust bearing 400, the hydraulic pistons 500 push the TRT rotor 300 to displace in a direction away from or close to the bearing steel of the unit through the thrust bearing 400. One hydraulic piston 500 pushes the TRT rotor 300 to displace in a direction away from the bearing steel of the unit through the thrust bearing 400, and at this time, the thrust direction of the hydraulic piston 500 is the main thrust direction of the hydraulic piston 500; the other hydraulic piston 500 pushes the TRT rotor 300 to displace towards the bearing steel of the unit through the thrust bearing 400, and the thrust direction of the hydraulic piston 500 is the secondary pushing direction of the hydraulic piston 500.

The oil inlet pipeline is provided with a first flow control valve and an oil inlet electromagnetic valve respectively, and the oil return pipeline is provided with a second flow control valve and an oil return electromagnetic valve respectively. The oil inlet amount and the oil return amount of the hydraulic piston 500 are controlled by the two flow control valves, so that the work of the two hydraulic pistons 500 in the axial direction can be controlled, and the axial displacement of the TRT rotor 300 can be adjusted.

For the radial displacement sensor 800 and the transverse displacement sensor 900, the radial displacement sensor 800 is disposed on the unit bearing steel, and the radial displacement sensor 800 is configured to detect the size of the dynamic and static gaps between the turbine movable blade 100 and the unit bearing cylinder 200. Specifically, the radial displacement sensor 800 may be a laser displacement sensor, and measures the size of the dynamic and static gaps between the turbine moving blade 100 and the unit bearing cylinder 200 by using a laser technology; the lateral displacement sensor 900 is disposed on an axial displacement path of the TRT rotor 300, and specifically, the radial displacement sensor 800 may be a linear displacement sensor or an angular displacement sensor, and is configured to detect an axial position of the TRT rotor 300.

In the TRT clearance adjusting device in this embodiment, an additional controller 700 may be provided, and the controller 700 controls the TRT clearance adjusting device to adjust the dynamic and static clearances between the turbine movable blade 100 and the unit bearing cylinder 200, where the specific clearance adjusting process of the controller 700 is as follows:

when the axial position of the TRT rotor 300 exceeds the safety position, the hydraulic oil pump 600 performs hydraulic pressure on the flowing lubricating oil, the hydraulic lubricating oil enters the hydraulic piston 500 and drives the hydraulic piston 500 to do work outwards, and the TRT rotor 300 is pushed by the thrust bearing 400 to displace the TRT rotor 300 in the direction away from the bearing steel of the unit until the axial position of the TRT rotor 300 is located at the safety position;

when the dynamic and static gaps are too large, the hydraulic oil pump 600 performs hydraulic pressure on the lubricating oil flowing through, the hydraulic lubricating oil enters the hydraulic piston 500 and then drives the hydraulic piston 500 to do work outwards, the TRT rotor 300 is pushed by the thrust bearing 400, and the TRT rotor 300 displaces towards the direction close to the bearing steel of the unit under the thrust action of the thrust bearing 400 until the dynamic and static gaps return to the initial design value;

when the dynamic and static gaps of the unit are too small, the hydraulic oil pump 600 performs hydraulic pressure on the lubricating oil flowing through, the hydraulic lubricating oil enters the hydraulic piston 500 and then drives the hydraulic piston 500 to do work outwards, the TRT rotor 300 is pushed by the thrust bearing 400, and the TRT rotor 300 displaces in the direction away from the bearing steel of the unit under the thrust action of the thrust bearing 400 until the dynamic and static gaps return to the initial design value.

In a practical application, taking a certain large-scale unit as an example, the blast furnace is 2500m3, after the hydraulic clearance adjusting device in the embodiment is configured, the efficiency of the TRT unit can be improved from 76% to 78%, the exhaust temperature is reduced by 2 ℃ under the same import parameters, the generated power is increased by 345KW/h, the annual running time is 8000h, the electricity charge is 0.6 yuan, the annual generation income is increased by 165.6 ten thousand yuan, and huge economic benefits can be brought to enterprises.

The above-mentioned embodiments only express a certain implementation manner of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which all fall within the protection scope of the present invention; therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A TRT gap adjustment device, comprising:

a TRT rotor;

2. The TRT clearance adjustment device according to claim 1, further comprising a radial displacement sensor, wherein the radial displacement sensor is arranged on the unit bearing steel, and the radial displacement sensor is used for detecting the size of the dynamic and static clearance between the turbine movable blade and the unit bearing cylinder.

3. The TRT clearance adjustment apparatus according to claim 1, further comprising a lateral displacement sensor provided on an axial displacement path of the TRT rotor for detecting an axial position of the TRT rotor.

4. The TRT clearance adjustment apparatus according to claim 1, further comprising a hydraulic oil pump, one oil port of the hydraulic oil pump being communicated with the oil inlet of the hydraulic piston through an oil inlet pipe, and the other oil port of the hydraulic oil pump being communicated with the oil outlet of the hydraulic piston through an oil return pipe.

5. The TRT clearance adjustment apparatus according to claim 4, further comprising a filter provided on an oil feed pipe between the hydraulic oil pump and the hydraulic piston.

6. The TRT clearance adjusting device according to claim 4, wherein the oil inlet pipeline is provided with a first flow control valve and an oil inlet electromagnetic valve, and the oil return pipeline is provided with a second flow control valve and an oil return electromagnetic valve.