CN208996772U - A kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjustment structure - Google Patents
A kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjustment structure Download PDFInfo
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- CN208996772U CN208996772U CN201821409018.7U CN201821409018U CN208996772U CN 208996772 U CN208996772 U CN 208996772U CN 201821409018 U CN201821409018 U CN 201821409018U CN 208996772 U CN208996772 U CN 208996772U
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- low pressure
- cylinder
- shaft seal
- air
- return
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Abstract
The utility model discloses a kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amounts to adjust structure, it is characterized by: the A.B low pressure (LP) cylinder includes A low pressure (LP) cylinder and B low pressure (LP) cylinder, the A low pressure (LP) cylinder is equipped with axle envelope return-air, the air inlet of A low pressure (LP) cylinder rear shaft seal, A low pressure (LP) cylinder rear shaft seal return-air before axle envelope air inlet, A low pressure (LP) cylinder before A low pressure (LP) cylinder, and the B low pressure (LP) cylinder is equipped with axle envelope return-air, the air inlet of B low pressure (LP) cylinder rear shaft seal, B low pressure (LP) cylinder rear shaft seal return-air before axle envelope air inlet, B low pressure (LP) cylinder before B low pressure (LP) cylinder；Axle envelope air inlet, B low pressure (LP) cylinder rear shaft seal air inlet are equipped with vapor filter before axle envelope air inlet, the air inlet of A low pressure (LP) cylinder rear shaft seal, B low pressure (LP) cylinder before the A low pressure (LP) cylinder, and axle envelope return-air, B low pressure (LP) cylinder rear shaft seal return-air are equipped with shut-off valve before axle envelope return-air, A low pressure (LP) cylinder rear shaft seal return-air, B low pressure (LP) cylinder before the A low pressure (LP) cylinder；Utility model has the advantages that improvement cost is low, it is easy to operate after transformation.
Description
Technical field
The utility model relates to a kind of evaporation capacity for engine to adjust structure, specifically a kind of upper vapour 670MW steam turbine A.B low pressure
Cylinder shaft gland sealing steam supply amount adjusts structure, belongs to evaporation capacity for engine adjustment construction applications.
Background technique
Currently, there are two low pressure (LP) cylinders for upper vapour 670MW steam turbine, indicated with A low pressure (LP) cylinder and B low pressure (LP) cylinder, low pressure (LP) cylinder axle envelope exists
In the case of high load capacity, there is a problem of evaporation capacity for engine deficiency.Vapour increase, axle envelope are emitted if improving shaft seal steam pressure and will cause axle envelope
Leakage losses increases, and also will cause into vapour in oil, and shaft seal steam hypotony will cause shaft seal steam amount deficiency again, influences steamer
Machine vacuum.
Summary of the invention
To solve the above-mentioned problems, the utility model devises a kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam
Amount adjustment structure, solving the problems, such as vapour 670MW steam turbine, A.B low pressure (LP) cylinder shaft seal steam amount is insufficient under high loads, transformation
It is at low cost, it is easy to operate after transformation, improve economic benefit.
The technical solution of the utility model are as follows:
A kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjustment structure, the A.B low pressure (LP) cylinder includes A low pressure
Cylinder and B low pressure (LP) cylinder, the A low pressure (LP) cylinder is equipped with axle envelope return-air, A low pressure (LP) cylinder rear shaft seal before axle envelope air inlet, A low pressure (LP) cylinder before A low pressure (LP) cylinder
Air inlet, A low pressure (LP) cylinder rear shaft seal return-air, the B low pressure (LP) cylinder are low equipped with axle envelope return-air, B before axle envelope air inlet, B low pressure (LP) cylinder before B low pressure (LP) cylinder
The air inlet of cylinder pressure rear shaft seal, B low pressure (LP) cylinder rear shaft seal return-air；Axle envelope air inlet, the air inlet of A low pressure (LP) cylinder rear shaft seal, B before the A low pressure (LP) cylinder
Axle envelope air inlet, B low pressure (LP) cylinder rear shaft seal air inlet are equipped with vapor filter before low pressure (LP) cylinder, and vapor filter can prevent impurity from entering
Axle envelope, axle envelope return-air, B low pressure (LP) cylinder rear axle before axle envelope return-air, A low pressure (LP) cylinder rear shaft seal return-air, B low pressure (LP) cylinder before the A low pressure (LP) cylinder
Envelope return-air is equipped with shut-off valve, i.e. shut-off valve 1, shut-off valve 2, shut-off valve 3, shut-off valve 4.When unit load is higher, low-pressure shaft
Gland sealing steam supply amount is insufficient, is adjusted by the aperture that appropriateness reduces shut-off valve 1,2,3,4, to meet the requirement of shaft seal steam amount.
Utility model has the advantages that solving vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam under high loads
Insufficient problem is measured, improvement cost is low, and it is easy to operate after transformation, improve economic benefit.
The utility model is described in further detail with reference to the accompanying drawings and examples.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model embodiment.
Specific embodiment
The preferred embodiment of the utility model is illustrated below, it should be understood that preferred embodiment described herein
It is only used for describing and explaining the present invention, is not used to limit the utility model.
Embodiment 1
As shown in Figure 1, a kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjusts structure, the A.B low pressure
Cylinder includes A low pressure (LP) cylinder and B low pressure (LP) cylinder, and the A low pressure (LP) cylinder is low equipped with axle envelope return-air, A before axle envelope air inlet, A low pressure (LP) cylinder before A low pressure (LP) cylinder
The air inlet of cylinder pressure rear shaft seal, A low pressure (LP) cylinder rear shaft seal return-air, the B low pressure (LP) cylinder are equipped with axle envelope air inlet, B low pressure (LP) cylinder front axle before B low pressure (LP) cylinder
Seal return-air, the air inlet of B low pressure (LP) cylinder rear shaft seal, B low pressure (LP) cylinder rear shaft seal return-air；Before the A low pressure (LP) cylinder after axle envelope air inlet, A low pressure (LP) cylinder
Axle envelope air inlet, B low pressure (LP) cylinder rear shaft seal air inlet are equipped with vapor filter, the effect of vapor filter before axle envelope air inlet, B low pressure (LP) cylinder
It is that impurity enters axle envelope in order to prevent, axle envelope return-air, A low pressure (LP) cylinder rear shaft seal return-air, B low pressure (LP) cylinder front axle before the A low pressure (LP) cylinder
Envelope return-air, B low pressure (LP) cylinder rear shaft seal return-air are equipped with shut-off valve, i.e. shut-off valve 1, shut-off valve 2, shut-off valve 3, shut-off valve 4.Unit is negative
When lotus is higher, feeding of low-pressure shaft seal amount is insufficient, is adjusted by the aperture that appropriateness reduces shut-off valve 1,2,3,4, to meet axis
The requirement of gland sealing steam supply amount.
Claims (1)
1. a kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjusts structure, it is characterised in that: the A.B low pressure (LP) cylinder
Including A low pressure (LP) cylinder and B low pressure (LP) cylinder, the A low pressure (LP) cylinder is equipped with axle envelope return-air, A low pressure before axle envelope air inlet, A low pressure (LP) cylinder before A low pressure (LP) cylinder
The air inlet of cylinder rear shaft seal, A low pressure (LP) cylinder rear shaft seal return-air, the B low pressure (LP) cylinder is equipped with axle envelope before axle envelope air inlet, B low pressure (LP) cylinder before B low pressure (LP) cylinder
Return-air, the air inlet of B low pressure (LP) cylinder rear shaft seal, B low pressure (LP) cylinder rear shaft seal return-air；Axle envelope air inlet, A low pressure (LP) cylinder rear axle before the A low pressure (LP) cylinder
Axle envelope air inlet, B low pressure (LP) cylinder rear shaft seal air inlet are equipped with vapor filter, the A low pressure (LP) cylinder front axle before envelope air inlet, B low pressure (LP) cylinder
Axle envelope return-air, B low pressure (LP) cylinder rear shaft seal return-air are equipped with shut-off valve before envelope return-air, A low pressure (LP) cylinder rear shaft seal return-air, B low pressure (LP) cylinder, work as machine
When group load is higher, feeding of low-pressure shaft seal amount is insufficient, is adjusted by the aperture that appropriateness reduces shut-off valve, to meet axle envelope confession
The requirement of vapour amount.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409018.7U CN208996772U (en) | 2018-08-30 | 2018-08-30 | A kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjustment structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821409018.7U CN208996772U (en) | 2018-08-30 | 2018-08-30 | A kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjustment structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208996772U true CN208996772U (en) | 2019-06-18 |
Family
ID=66799157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821409018.7U Expired - Fee Related CN208996772U (en) | 2018-08-30 | 2018-08-30 | A kind of upper vapour 670MW steam turbine A.B low pressure (LP) cylinder shaft seal steam amount adjustment structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208996772U (en) |
-
2018
- 2018-08-30 CN CN201821409018.7U patent/CN208996772U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190618 Termination date: 20200830 |