CN208669359U - Condensing turbine low pressure shaft seal seals Optimal Control System - Google Patents
Condensing turbine low pressure shaft seal seals Optimal Control System Download PDFInfo
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- CN208669359U CN208669359U CN201821485496.6U CN201821485496U CN208669359U CN 208669359 U CN208669359 U CN 208669359U CN 201821485496 U CN201821485496 U CN 201821485496U CN 208669359 U CN208669359 U CN 208669359U
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- low pressure
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Abstract
The utility model discloses a kind of condensing turbine low pressure shaft seals to seal Optimal Control System, including the first temperature measuring device, is mounted on feeding of low-pressure shaft seal pipeline, is used for real-time measurement feeding of low-pressure shaft seal temperature；Second temperature measuring device is mounted on low pressure shaft seal return tube road, is used for real-time measurement low pressure shaft seal back-steam temperature；Third temperature measuring device, for environment temperature near real-time measurement low pressure shaft seal；First temperature measuring device, second temperature measuring device and third temperature measuring device are connected with controller respectively, the controller is also connected with feeding of low-pressure shaft seal pressure-regulating valve, and the feeding of low-pressure shaft seal pressure-regulating valve is mounted on feeding of low-pressure shaft seal pipeline.It can adjust feeding of low-pressure shaft seal pressure in real time, realize the excellent sealing of steam turbine low pressure shaft seal.
Description
Technical field
The utility model belongs to steam feeding of low-pressure shaft seal in turbine control field more particularly to a kind of condensing turbine low pressure
Axle envelope seals Optimal Control System.
Background technique
The axle envelope of condensing turbine can prevent outside air from entering steam in steam turbine or inside steam turbine to leaking
Leakage.It is known as high pressure shaft seal in the axle envelope of the high pressure section of steam turbine, normal function is to prevent steam from leaking out, to ensure vapour
Turbine has higher efficiency；It is known as low pressure shaft seal in the axle envelope of steam turbine low-pressure section, then is to prevent extraneous air from entering vapour
Inside turbine, guarantee that steam turbine has vacuum as high as possible, also for the efficiency for guaranteeing Steam Turbine.
Conventional feeding of low-pressure shaft seal System Working Principle is:
Gland steam main pipe, gland steam main pipe point are entered by the high-pressure shaft gland leak-off or the external steam provided of steam turbine
It is not connect with shaft seal overflow valve, attemperator；When steam pressure is higher than setting value in gland steam main pipe, shaft seal overflow valve is gradually
Opening makes feeding of low-pressure shaft seal pressure be down to setting value；Steam in gland steam main pipe passes through first before entering low pressure shaft seal
Attemperator reduces to certain temperature, then enters low pressure shaft seal through low pressure shaft seal steam inlet pipe.Into low pressure shaft seal steam there are three
Place to go, when the steam pressure for entering low pressure shaft seal is too low, the even whole steam of most of steam enter the low pressure of steam turbine
In cylinder, the air under such operating condition outside axle envelope is possible to also enter the low pressure (LP) cylinder of steam turbine by axle envelope；When enter low pressure
When the steam pressure of axle envelope is suitable, a part of steam enters the low pressure (LP) cylinder of steam turbine, and another part steam is returned through low pressure shaft seal
Steam pipe enters gland heater, and the air under such operating condition outside axle envelope can enter axle envelope through low pressure shaft seal return tube with steam and add
Hot device, and outside air will not enter turbine low pressure cylinder；When enter low pressure shaft seal steam pressure it is excessively high when, steam in addition into
Enter turbine low pressure cylinder, outside low pressure shaft seal return tube, some steam can drain in air from low pressure shaft seal position, cause
The waste of steam or damage other equipment or even steam, which can enter steam turbine bearing lubrication oil system, leads to oily deterioration.
Therefore, feeding of low-pressure shaft seal pressure must keep suitable numerical value.In steam turbine actual moving process, watch is run
Member mainly adjusts feeding of low-pressure shaft seal pressure, but such adjustment side whether there is or not steam is excessive at low pressure shaft seal by observing, checking
Formula has the following problems:
(1) excessive without steam at low pressure shaft seal, it can only illustrate that steam pressure is not excessively high, but cannot be guaranteed that air is obstructed too low
Last item envelope enters turbine low pressure cylinder；Each position (including low pressure shaft seal is generally judged by unit vacuum tightness test
Place) sealing situation.
(2) when steamer machine-heating load changes, vacuum value of condenser can change, and turbine low pressure cylinder is to low pressure shaft seal steam
Suction can also change, originally modulated whole suitable feeding of low-pressure shaft seal pressure value is possible to no longer suitable, air be possible to through
It is spilt in air outside the steam that low pressure shaft seal enters in low pressure (LP) cylinder or low pressure shaft seal.
(3) when certain reason of low pressure shaft seal return tube internal cause causes opposing steam flow unsmooth, steam is possible to from low pressure shaft seal
Place is outer to be spilt in air；Operator keeps steam no longer excessive and fully enters as reduced feeding of low-pressure shaft seal pressure at this time
Low pressure (LP) cylinder, because of the suction of low pressure (LP) cylinder, outside air is also possible to enter low pressure (LP) cylinder by low pressure shaft seal.
In conclusion current feeding of low-pressure shaft seal pressure controling means cannot be guaranteed feeding of low-pressure shaft seal pressure value always
Meeting low pressure shaft seal not only can be carried out excellent sealing but also the excessive needs of steam will not occur, and inwardly hollow conductance causes low pressure shaft seal
Unit economy decline or the neighbouring equipment of the excessive damage low pressure shaft seal of steam cause bearing lubrication oil deterioration event Shi Youfa
It is raw, it needs to optimize existing steam turbine low pressure shaft seal sealing control system.
Utility model content
In order to solve the deficiencies in the prior art, first purpose of the utility model is to provide a kind of condensing turbine low pressure
Axle envelope seals Optimal Control System, can adjust feeding of low-pressure shaft seal pressure in real time, realize the good of steam turbine low pressure shaft seal
Sealing.
A kind of condensing turbine low pressure shaft seal of the utility model seals Optimal Control System, comprising:
First temperature measuring device is mounted on feeding of low-pressure shaft seal pipeline, is used for real-time measurement feeding of low-pressure shaft seal
Temperature；
Second temperature measuring device is mounted on low pressure shaft seal return tube road, is used for real-time measurement low pressure shaft seal back-steam
Temperature；
Third temperature measuring device, for environment temperature near real-time measurement low pressure shaft seal；
First temperature measuring device, second temperature measuring device and third temperature measuring device respectively with controller phase
Even, the controller is also connected with feeding of low-pressure shaft seal pressure-regulating valve, and the feeding of low-pressure shaft seal pressure-regulating valve is mounted on
On feeding of low-pressure shaft seal pipeline.
Further, the controller is also connected with device for pressure measurement, and the device for pressure measurement is mounted on low-pressure shaft
On gland sealing steam supply pipeline, it to be used for real-time measurement feeding of low-pressure shaft seal pressure.
Further, the third temperature measuring device is installed on the surface of low pressure shaft seal.
Further, the controller is also connected with alarm.
Further, the controller is also connected with cloud server, the cloud server and remote monitoring terminal phase
Even.
Compared with prior art, the utility model has the beneficial effects that
(1) the utility model utilizes the first temperature measuring device, second temperature measuring device and third temperature measuring device
Real-time measurement feeding of low-pressure shaft seal temperature, low pressure shaft seal back-steam temperature and low pressure shaft seal nearby environment temperature and are sent to control respectively
Device processed, controller adjusts feeding of low-pressure shaft seal pressure by control feeding of low-pressure shaft seal pressure-regulating valve, so that low pressure shaft seal
Nearby environment temperature is in default normal range (NR) and feeding of low-pressure shaft seal temperature reaches preset temperature for back-steam temperature and low pressure shaft seal
Threshold value, to guarantee the sealing performance of low pressure shaft seal.
(2) the utility model is also low come real-time measurement by the device for pressure measurement being mounted on feeding of low-pressure shaft seal pipeline
Last item gland sealing steam supply pressure, to guarantee to adjust the safety of feeding of low-pressure shaft seal pressure.
(3) third temperature measuring device is also installed on the surface of low pressure shaft seal by the utility model, in this way convenient for detection
The excessive generation of steam.
(4) controller of the utility model is also connected with alarm, when there is the unsmooth defect of back-steam, is mentioned using alarm
Personnel inspection reason of waking up simultaneously is eliminated.
(5) controller of the utility model is also connected with cloud server, the cloud server and remote monitoring terminal
It is connected, can be realized the long-range monitoring of condensing turbine low pressure shaft seal sealing Optimal Control System in this way.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is a kind of one knot of embodiment of condensing turbine low pressure shaft seal sealing Optimal Control System of the utility model
Structure schematic diagram.
Fig. 2 is a kind of two knot of embodiment of condensing turbine low pressure shaft seal sealing Optimal Control System of the utility model
Structure schematic diagram.
Fig. 3 is a kind of three knot of embodiment of condensing turbine low pressure shaft seal sealing Optimal Control System of the utility model
Structure schematic diagram.
Fig. 4 is a kind of example IV knot of condensing turbine low pressure shaft seal sealing Optimal Control System of the utility model
Structure schematic diagram.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
Embodiment one
As shown in Figure 1, a kind of condensing turbine low pressure shaft seal of the present embodiment seals Optimal Control System, at least wrap
Include: controller and the first temperature measuring device being connected respectively with controller, second temperature measuring device and third temperature are surveyed
Device is measured, the controller is also connected with feeding of low-pressure shaft seal pressure-regulating valve, the feeding of low-pressure shaft seal pressure-regulating valve peace
On feeding of low-pressure shaft seal pipeline.
Wherein, the first temperature measuring device is mounted on feeding of low-pressure shaft seal pipeline, is supplied for real-time measurement low pressure shaft seal
Stripping temperature；
Second temperature measuring device is mounted on low pressure shaft seal return tube road, is used for real-time measurement low pressure shaft seal back-steam temperature
Degree；
Third temperature measuring device, for environment temperature near real-time measurement low pressure shaft seal.
Preferably, the third temperature measuring device is installed on the surface of low pressure shaft seal.
Generation excessive convenient for detection steam in this way.
In specific implementation, the first temperature measuring device, second temperature measuring device and third temperature measuring device difference
It is mounted at the neighbouring environment temperature measuring point of feeding of low-pressure shaft seal temperature point, low pressure shaft seal back-steam temperature point and low pressure shaft seal.
In the present embodiment, single-chip microcontroller or programmable logic processor can be used in controller or scattered control system is come in fact
It is existing.
The working principle of the condensing turbine low pressure shaft seal sealing Optimal Control System of the present embodiment is:
It is low using the first temperature measuring device, second temperature measuring device and third temperature measuring device difference real-time measurement
The neighbouring environment temperature of last item gland sealing steam supply temperature, low pressure shaft seal back-steam temperature and low pressure shaft seal is simultaneously sent to controller, and controller is logical
Control feeding of low-pressure shaft seal pressure-regulating valve is crossed to adjust feeding of low-pressure shaft seal pressure, so that low pressure shaft seal back-steam temperature and low pressure
Nearby environment temperature is in default normal range (NR) and feeding of low-pressure shaft seal temperature reaches preset temperature threshold for axle envelope, to guarantee low pressure
The sealing performance of axle envelope.
Embodiment two
As shown in Fig. 2, a kind of condensing turbine low pressure shaft seal of the present embodiment seals Optimal Control System, at least wrap
Include: controller and the first temperature measuring device being connected respectively with controller, second temperature measuring device and third temperature are surveyed
Device is measured, the controller is also connected with feeding of low-pressure shaft seal pressure-regulating valve, the feeding of low-pressure shaft seal pressure-regulating valve peace
On feeding of low-pressure shaft seal pipeline.
Wherein, the first temperature measuring device is mounted on feeding of low-pressure shaft seal pipeline, is supplied for real-time measurement low pressure shaft seal
Stripping temperature；
Second temperature measuring device is mounted on low pressure shaft seal return tube road, is used for real-time measurement low pressure shaft seal back-steam temperature
Degree；
Third temperature measuring device, for environment temperature near real-time measurement low pressure shaft seal.
Preferably, the third temperature measuring device is installed on the surface of low pressure shaft seal.
Generation excessive convenient for detection steam in this way.
In specific implementation, the first temperature measuring device, second temperature measuring device and third temperature measuring device difference
It is mounted at the neighbouring environment temperature measuring point of feeding of low-pressure shaft seal temperature point, low pressure shaft seal back-steam temperature point and low pressure shaft seal.
In the present embodiment, single-chip microcontroller or programmable logic processor can be used in controller or scattered control system is come in fact
It is existing.
The controller is also connected with device for pressure measurement, and the device for pressure measurement is mounted on feeding of low-pressure shaft seal pipeline
On, it is used for real-time measurement feeding of low-pressure shaft seal pressure.
Wherein, pressure sensor can be used to realize in device for pressure measurement, and concrete model can be according to available accuracy demand
Further to select.
The present embodiment is also by the device for pressure measurement that is mounted on feeding of low-pressure shaft seal pipeline come real-time measurement low-pressure shaft
Gland sealing steam supply pressure, to guarantee to adjust the safety of feeding of low-pressure shaft seal pressure.
Embodiment three
As shown in figure 3, a kind of condensing turbine low pressure shaft seal of the present embodiment seals Optimal Control System, at least wrap
Include: controller and the first temperature measuring device being connected respectively with controller, second temperature measuring device and third temperature are surveyed
Device is measured, the controller is also connected with feeding of low-pressure shaft seal pressure-regulating valve, the feeding of low-pressure shaft seal pressure-regulating valve peace
On feeding of low-pressure shaft seal pipeline.
Wherein, the first temperature measuring device is mounted on feeding of low-pressure shaft seal pipeline, is supplied for real-time measurement low pressure shaft seal
Stripping temperature；
Second temperature measuring device is mounted on low pressure shaft seal return tube road, is used for real-time measurement low pressure shaft seal back-steam temperature
Degree；
Third temperature measuring device, for environment temperature near real-time measurement low pressure shaft seal.
Preferably, the third temperature measuring device is installed on the surface of low pressure shaft seal.
Generation excessive convenient for detection steam in this way.
In specific implementation, the first temperature measuring device, second temperature measuring device and third temperature measuring device difference
It is mounted at the neighbouring environment temperature measuring point of feeding of low-pressure shaft seal temperature point, low pressure shaft seal back-steam temperature point and low pressure shaft seal.
In the present embodiment, single-chip microcontroller or programmable logic processor can be used in controller or scattered control system is come in fact
It is existing.
The controller of the present embodiment is also connected with alarm, when there is the unsmooth defect of back-steam, reminds people using alarm
Member checks reason and is eliminated.
Wherein, alarm can be combined aural and visual alarm.
Example IV
As shown in figure 3, a kind of condensing turbine low pressure shaft seal of the present embodiment seals Optimal Control System, at least wrap
Include: controller and the first temperature measuring device being connected respectively with controller, second temperature measuring device and third temperature are surveyed
Device is measured, the controller is also connected with feeding of low-pressure shaft seal pressure-regulating valve, the feeding of low-pressure shaft seal pressure-regulating valve peace
On feeding of low-pressure shaft seal pipeline.
Wherein, the first temperature measuring device is mounted on feeding of low-pressure shaft seal pipeline, is supplied for real-time measurement low pressure shaft seal
Stripping temperature；
Second temperature measuring device is mounted on low pressure shaft seal return tube road, is used for real-time measurement low pressure shaft seal back-steam temperature
Degree；
Third temperature measuring device, for environment temperature near real-time measurement low pressure shaft seal.
Preferably, the third temperature measuring device is installed on the surface of low pressure shaft seal.
Generation excessive convenient for detection steam in this way.
In specific implementation, the first temperature measuring device, second temperature measuring device and third temperature measuring device difference
It is mounted at the neighbouring environment temperature measuring point of feeding of low-pressure shaft seal temperature point, low pressure shaft seal back-steam temperature point and low pressure shaft seal.
In the present embodiment, single-chip microcontroller or programmable logic processor can be used in controller or scattered control system is come in fact
It is existing.
The controller is also connected with cloud server, and the cloud server is connected with remote monitoring terminal.
Wherein, remote monitoring terminal can be PC machine or mobile terminal.
The controller of the utility model is also connected with cloud server, the cloud server and remote monitoring terminal phase
Even, it can be realized the long-range monitoring of condensing turbine low pressure shaft seal sealing Optimal Control System in this way.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (5)
1. a kind of condensing turbine low pressure shaft seal seals Optimal Control System characterized by comprising
First temperature measuring device is mounted on feeding of low-pressure shaft seal pipeline, is used for real-time measurement feeding of low-pressure shaft seal temperature；
Second temperature measuring device is mounted on low pressure shaft seal return tube road, is used for real-time measurement low pressure shaft seal back-steam temperature；
Third temperature measuring device, for environment temperature near real-time measurement low pressure shaft seal；
First temperature measuring device, second temperature measuring device and third temperature measuring device are connected with controller respectively,
The controller is also connected with feeding of low-pressure shaft seal pressure-regulating valve, and the feeding of low-pressure shaft seal pressure-regulating valve is mounted on low pressure
On shaft seal steam pipeline.
2. a kind of condensing turbine low pressure shaft seal as described in claim 1 seals Optimal Control System, which is characterized in that institute
It states controller to be also connected with device for pressure measurement, the device for pressure measurement is mounted on feeding of low-pressure shaft seal pipeline, for real
When measure feeding of low-pressure shaft seal pressure.
3. a kind of condensing turbine low pressure shaft seal as described in claim 1 seals Optimal Control System, which is characterized in that institute
State the surface that third temperature measuring device is installed on low pressure shaft seal.
4. a kind of condensing turbine low pressure shaft seal as described in claim 1 seals Optimal Control System, which is characterized in that institute
Controller is stated also to be connected with alarm.
5. a kind of condensing turbine low pressure shaft seal as described in claim 1 seals Optimal Control System, which is characterized in that institute
It states controller to be also connected with cloud server, the cloud server is connected with remote monitoring terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821485496.6U CN208669359U (en) | 2018-09-11 | 2018-09-11 | Condensing turbine low pressure shaft seal seals Optimal Control System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821485496.6U CN208669359U (en) | 2018-09-11 | 2018-09-11 | Condensing turbine low pressure shaft seal seals Optimal Control System |
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| Publication Number | Publication Date |
|---|---|
| CN208669359U true CN208669359U (en) | 2019-03-29 |
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|---|---|---|---|
| CN201821485496.6U Active CN208669359U (en) | 2018-09-11 | 2018-09-11 | Condensing turbine low pressure shaft seal seals Optimal Control System |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915788A (en) * | 2018-09-11 | 2018-11-30 | 山东国电发电工程有限公司 | Condensing turbine low pressure shaft seal seals Optimal Control System and method |
-
2018
- 2018-09-11 CN CN201821485496.6U patent/CN208669359U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108915788A (en) * | 2018-09-11 | 2018-11-30 | 山东国电发电工程有限公司 | Condensing turbine low pressure shaft seal seals Optimal Control System and method |
| CN108915788B (en) * | 2018-09-11 | 2024-01-09 | 山东国电发电工程有限公司 | Low-pressure shaft seal optimization control system and method for condensing steam turbine |
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