CN207598298U - A kind of power turbine high-temperature medium sealing system - Google Patents
A kind of power turbine high-temperature medium sealing system Download PDFInfo
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- CN207598298U CN207598298U CN201721820667.1U CN201721820667U CN207598298U CN 207598298 U CN207598298 U CN 207598298U CN 201721820667 U CN201721820667 U CN 201721820667U CN 207598298 U CN207598298 U CN 207598298U
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- turbine
- sealing
- wheel back
- labyrinth seal
- pressure
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model provides a kind of power turbine high-temperature medium sealing system, including the turbine in gear case body, turbine casing, the gas inlet shell being arranged in turbine casing, turbine casing and the turbine wheel shaft being connected with turbine, wheel back of the body sealing is equipped in turbine wheel back, labyrinth seal mechanism is equipped on turbine wheel shaft, the wheel back of the body sealing is connected with the labyrinth seal mechanism；Bleed air line is provided with outside turbine casing, air inlet pipeline is externally provided in gear case body；Described bleed air line one end and labyrinth seal mechanism connection, the other end are connected with turbine casing inner cavity；The air inlet pipeline is communicated in the wheel back of the body sealing and the cavity of the labyrinth seal mechanism connection, and to be passed through compressed air to the sealing of the wheel back of the body and labyrinth seal mechanism, the pressure for being passed through compressed air is more than the pressure of turbine medium.The utility model is sealed turbine high-temperature medium, and leakage efficiency is high, effectively reduces turbine wheel back of the body temperature, effectively reduces turbine system heat loss.
Description
Technical field
The utility model is related to turbine technical field of sealing technology, specially a kind of power turbine high-temperature medium sealing system.
Background technology
Turbine is widely used in energy-saving and emission-reduction field as high-energy density power part.Since power turbine makes
Medium is usually high temperature and high pressure gas, and the sealing of power turbine is always a great problem.The sealing system effect of the prior art
Rate is not high or the service life is not grown, and using effect is unsatisfactory, and high-temperature medium gas pressure is higher to be easily accessible the turbine wheel back of the body so that
Wheel back of the body hot soak condition, this will cause turbine life to shorten.Meanwhile the turbine wheel back of the body and the heat-insulated of gear-box are also one big
Problem, heat insulation is bad, and tooth case oil temperature is on the one hand caused to increase, and deteriorates bearing working environment, another aspect medium heat loss
Increase also results in the reduction of turbine whole efficiency.
Utility model content
For the defects in the prior art, the utility model provides a kind of power turbine high-temperature medium sealing system, close
It seals efficient, effective reduction turbine wheel back of the body temperature, effectively reduce turbine system heat loss.
Technical solutions of the utility model are as follows：
A kind of power turbine high-temperature medium sealing system, including gear case body, turbine casing, is arranged in turbine casing
Gas inlet shell, the turbine in turbine casing and the turbine wheel shaft being connected with turbine, it is characterised in that：Wheel is equipped in turbine wheel back
Back of the body sealing, is equipped with labyrinth seal mechanism on turbine wheel shaft, and the wheel back of the body sealing is connected with the labyrinth seal mechanism；In turbine
Bleed air line is provided with outside case, air inlet pipeline is externally provided in gear case body；Described bleed air line one end and labyrinth seal machine
Structure connects, and the other end is connected with turbine casing inner cavity；The air inlet pipeline is communicated in the wheel back of the body sealing and the labyrinth seal
The cavity of mechanism connection, to be passed through compressed air to the sealing of the wheel back of the body and labyrinth seal mechanism, the pressure for being passed through compressed air is more than
The pressure of turbine medium.
The utility model carries on the back sealing to turbine wheel and labyrinth seal mechanism is passed through pressure more than medium gas by air inlet pipeline
The compressed air of body, a compressed air part are carried on the back by taking turns in sealing inflow mainstream medium, and a part passes through labyrinth seal mechanism
Turbine cover inner cavity is introduced by bleed air line, ultimately forms dynamic equilibrium.The utility model effectively avoids high-temperature medium gas, into
Enter the turbine wheel back of the body and turbine wheel shaft, so as to be effectively sealed against to turbine high-temperature medium, leakage efficiency is high；Reduce the turbine wheel back of the body
Temperature reduces radiant heat transfer amount of the turbine to gear-box, improves turbine system efficiency, improves turbine system working environment, increases
Add the turbine system service life.
Preferably, the air inlet pipeline is equipped with pressure reducing valve.
Preferably, pressure guiding pipe is equipped between the gas inlet shell and the pressure reducing valve, pressure guiding pipe one end connects with gas inlet shell inner cavity
Logical, the other end is connected with the decompression valve control.
In this way, the pressure of intracavitary medium in gas inlet shell is introduced by decompression valve control by pressure guiding pipe, to control pressurization
Valve opening remains that the pressure of air inlet pipeline compressed air is more than the pressure of turbine medium, and ensures that pressure difference is definite value.
Preferably, the labyrinth seal mechanism includes the inner seal ring and exterior seal ring that are axially set gradually along turbine wheel shaft,
The bleed air line is connected with the cavity between inner seal ring and exterior seal ring.
Description of the drawings
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution of the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, it is similar
Element or part are generally identified by similar reference numeral.In attached drawing, each element or part might not be according to practical ratios
It draws.
Fig. 1 is the utility model structure diagram in specific embodiment；
In attached drawing：1- gear case bodies；2- bleed air lines；3- wheel back of the body sealings；4- air sealings；5- labyrinth seals mechanism；
501- inner seal rings；502- exterior seal rings；6- turbines；7- turbine wheel shafts；8- air inlet pipelines；9- pressure reducing valves；10- pressure guiding pipes；11- into
Gas shell；12- turbine casings.
Specific embodiment
The embodiment of the utility model is described in further detail below in conjunction with the accompanying drawings.
In the present embodiment, the orientation or position of the instructions such as term " on " " under " " left side " " right side " " preceding " " rear " " upper end " " lower end "
It is based on orientation shown in the drawings or position relationship to put relationship, is for only for ease of description rather than instruction or implies meaning
Device or element must have specific orientation, with specific azimuth configuration or operation, therefore it is not intended that new to this practicality
The limitation of type.
As shown in Figure 1, a kind of power turbine high-temperature medium sealing system, including gear case body 1, turbine casing 12, sets
Put the gas inlet shell 11 in turbine casing, the turbine 6 in turbine casing and the turbine wheel shaft 7 being connected with turbine 6；It is carried on the back in turbine wheel
Equipped with wheel back of the body sealing 3, labyrinth seal mechanism 5, the wheel back of the body sealing 3 and 5 phase of labyrinth seal mechanism are equipped on turbine wheel shaft 6
Connection, the labyrinth seal mechanism 5 are axially disposed with inner seal ring 501 and exterior seal ring along turbine wheel shaft by air sealing 4
502。
Bleed air line 2 is provided with outside turbine casing, air inlet pipeline 8 is provided with outside gear case body 1.The air entraining pipe
2 one end of road is connected with the cavity in labyrinth seal mechanism between inner seal ring 501 and exterior seal ring 502, the other end and turbine cover
2 inner cavity of shell connects.The air inlet pipeline 8 is connected with the cavity that the wheel back of the body sealing 3 is connected with the labyrinth seal mechanism 5,
To be passed through compressed air to the sealing of the wheel back of the body and labyrinth seal mechanism, the pressure for being passed through compressed air is more than the pressure of turbine medium.
The utility model is passed through pressure to turbine wheel back of the body sealing 3 and labyrinth seal mechanism 5 and is more than Jie by air inlet pipeline 8
The compressed air of matter gas, a compressed air part are carried on the back by taking turns in sealing inflow mainstream medium, and a part passes through labyrinth seal
Turbine cover inner cavity is introduced through bleed air line 2 after the inner seal ring 501 of mechanism, ultimately forms dynamic equilibrium.
High-temperature medium gas push turbine rotation is big due to being passed through pressure to the sealing of the turbine wheel back of the body and labyrinth seal mechanism
In the compressed air of pressure medium, high-temperature medium gas cannot be introduced into the turbine wheel back of the body and turbine wheel shaft, so as to turbine high-temperature medium
It is effectively sealed against, leakage efficiency is high；Turbine wheel back of the body temperature is thereby reduced, reduces radiation of the turbine to gear case body
Heat output improves turbine system efficiency, improves turbine system working environment, increases the turbine system service life.
In order to remain the pressure of air inlet pipeline 8 be more than turbine pressure medium, on air inlet pipeline 8 be equipped with pressure reducing valve 9,
Between the gas inlet shell and the pressure reducing valve be equipped with pressure guiding pipe 10, pressure guiding pipe one end is connected with gas inlet shell inner cavity, the other end and
The decompression valve control is connected.The pressure of intracavitary medium in gas inlet shell 11 is introduced by pressure reducing valve control by pressure guiding pipe 10 in this way
Device processed to control pressurization valve opening, remains that the pressure of air inlet pipeline compressed air is more than the pressure of turbine medium, and keep
Pressure difference is definite value.
Finally it should be noted that：Above example is only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that；
It can still modify to the technical solution recorded in previous embodiment either to which part or all technical features
Carry out equivalent replacement；And these modifications or replacement, the utility model embodiment that it does not separate the essence of the corresponding technical solution
The range of technical solution should all cover in the claim of the utility model and the range of specification.
Claims (4)
1. a kind of power turbine high-temperature medium sealing system including gear case body (1), turbine casing (12), is arranged on turbine
Turbine (6) in gas inlet shell (11), turbine casing on case and the turbine wheel shaft (7) being connected with turbine, it is characterised in that：
Turbine wheel back is equipped with wheel back of the body sealing (3), and labyrinth seal mechanism (5), the wheel back of the body sealing and the fan are equipped on turbine wheel shaft
Palace sealing mechanism is connected；Bleed air line (2) is provided with outside turbine casing (12), air inlet pipeline is externally provided in gear case body
(8)；Described bleed air line (2) one end is connected with labyrinth seal mechanism (5), and the other end is connected with turbine casing inner cavity；It is described into
Air pipe (8) is communicated in the wheel back of the body sealing and the cavity of the labyrinth seal mechanism connection, with close to the sealing of the wheel back of the body and labyrinth
Sealing mechanism is passed through compressed air, and the pressure for being passed through compressed air is more than the pressure of turbine medium.
2. power turbine high-temperature medium sealing system according to claim 1, it is characterised in that：It is set on the air inlet pipeline
There is pressure reducing valve (9).
3. power turbine high-temperature medium sealing system according to claim 2, it is characterised in that：The gas inlet shell with it is described
Pressure guiding pipe (10) is equipped between pressure reducing valve, pressure guiding pipe one end is connected with gas inlet shell (11) inner cavity, the other end and the pressure reducing valve control
Device processed is connected.
4. power turbine high-temperature medium sealing system according to claim 1, it is characterised in that：The labyrinth seal mechanism
Including the inner seal ring (501) axially set gradually along turbine wheel shaft and exterior seal ring (502)；The bleed air line (2) with it is interior close
Cavity connection between seal and exterior seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721820667.1U CN207598298U (en) | 2017-12-23 | 2017-12-23 | A kind of power turbine high-temperature medium sealing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721820667.1U CN207598298U (en) | 2017-12-23 | 2017-12-23 | A kind of power turbine high-temperature medium sealing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207598298U true CN207598298U (en) | 2018-07-10 |
Family
ID=62767615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721820667.1U Active CN207598298U (en) | 2017-12-23 | 2017-12-23 | A kind of power turbine high-temperature medium sealing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207598298U (en) |
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2017
- 2017-12-23 CN CN201721820667.1U patent/CN207598298U/en active Active
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