CN202531246U - Steam inlet device of turbine part - Google Patents
Steam inlet device of turbine part Download PDFInfo
- Publication number
- CN202531246U CN202531246U CN2012201710254U CN201220171025U CN202531246U CN 202531246 U CN202531246 U CN 202531246U CN 2012201710254 U CN2012201710254 U CN 2012201710254U CN 201220171025 U CN201220171025 U CN 201220171025U CN 202531246 U CN202531246 U CN 202531246U
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- return channel
- blade
- vanes
- steam turbine
- cone
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Abstract
The utility model belongs to the technical field of power machineries and relates to a steam inlet device of a turbine part. The steam inlet device comprises nozzles, a rotor, vanes, a backflow device housing, backflow device vanes and a backflow device cone, wherein the nozzles are reduced nozzles; the rotor is an integrated rotor and comprises a single-stage impeller and a shaft; the vanes are full-symmetric vanes, molded lines are fully symmetrical at the front parts and the rear parts of the vanes, and multiple same vanes are mounted on the single-stage impeller to form a row of vanes. As the vanes are full-symmetric and the flow direction of steam is changed by the backflow device housing, the backflow device vanes and the backflow device cone, the steam can enter into the front parts and the rear parts of the vanes to apply work. The enthalpy drop value of the single-stage impeller is increased. The problem of limitation of the enthalpy drop value of the single-stage impeller is solved, the number of stages of the turbine part is reduced under the conditions of low steam flow and high parameters, the structure is simplified and the cost is reduced.
Description
Technical field
The utility model belongs to the dynamic power machine technical field, relates to a kind of steam turbine partial admission device.
Technical background
Steam turbine is a kind of motive power machine device, is the device that the heat energy of water vapor is converted into mechanical work.Import thermodynamic parameter (like temperature, pressure) according to water vapor is classified, and steam turbine can be divided into subcritical pressure turbine, supercritical pressure turbine, supercritical turbine.
Steam turbine is widely used in national economy, but at some industrial fields, in processes such as metallurgy, chemical industry; Produce the water vapour that flow is little, parameter is high through regular meeting; Receive the restriction of state-of-the art, be difficult to use steam turbine to utilize the energy of this a part of water vapor, reason is following:
In steam turbine, a row stator blade and a row moving vane are formed one-level.Because the restriction of factors such as the strength of materials, turbine thermodynamic efficiency, poor (in the dynamic power machine field, abbreviating enthalpy drop as) that each grade can bear the heat enthalpy value of water vapor has certain limitation, if therefore the parameter of water vapor is higher, steam turbine adopts multilevel hierarchy usually.The more parameters of water vapor is high, and steam turbine needs to adopt more level more, and structure is more complicated, and cost is high more.Under the bigger situation of steam rates, though the multistage turbine cost is high, its power is big, and the income that obtains is also bigger; Under the less situation of steam rates, the multistage turbine cost is high, and power is little, and the income that obtains is less.Therefore present under the situation of high parameter small flow, be difficult to use the energy of steam turbine recycle-water steam.
In each level steam turbine, the height of turbine blade mainly confirms according to the flow of water vapor, and when blades height during less than certain value, the flow losses in the blade can increase, and the thermal efficiency of steam turbine can reduce significantly.At present when the flow of water vapor import hour, steam turbine adopts partial admission to improve blade height usually in a circumferential direction, partial admission also can bring energy loss, causes complex structure simultaneously.Though conventional partial admission structure has solved the problem of small flow rate tubine blade height, do not solve the single-stage enthalpy drop value restricted problem of steam turbine.If the flow of water vapor is less, parameter is higher, steam turbine certainly will adopt multistage partial admission structure so, causes that complex structure, cost increase, efficient is lower, income is less.
The model utility content
The utility model provides a kind of steam turbine partial admission device, has solved under the situation that flow is little, parameter is high of water vapor, because low, the complex structure of Efficiency of Steam Turbine, problem that manufacture cost is high.
The technological scheme that the utility model adopts is:
A kind of steam turbine partial admission device comprises nozzle, rotor, blade, return channel housing, return channel blade, return channel cone.
Nozzle is the nozzle of scaled version, and the cross section of nozzle is a circular arc.
Rotor is a unitary rotor, is made up of single-stage impeller and axle.
Blade is complete symmetrical blade, and molded lines is symmetrical fully in the front and back of blade, and a plurality of identical blade installation form a row blade on the single-stage impeller.
The surperficial molded lines of return channel blade is made up of back of the body camber line and inner arc molded lines.
The return channel cone is made up of three parts, and a part is a circular arc molded lines part, and a part is the straight section parallel with impeller, and a part is the angled straight lines part.
After return channel housing, return channel blade, the combination of return channel cone, form the passage one of shrink form between the back of the body camber line part of return channel blade and the return channel housing molded lines part; Form the passage two of shrink form between the inner arc molded lines part of return channel blade and the circular arc molded lines part of return channel cone; Form the passage three of expanded form between the angled straight lines part of return channel cone and the straight section of return channel housing.
Nozzle is installed on the steam turbine; Blade installation is on the single-stage impeller of rotor; Return channel housing, return channel blade, return channel cone are installed on the cylinder of steam turbine, form the rotating channel of air-flow jointly.
The acceleration of in nozzle 1, expanding of the water vapor of small flow, high parameter, the conversion of heat into kinetic energy of water vapor.Water vapor at a high speed impacts blade, to a percussion is arranged on the blade, is known by theorem of impulse, produces an impact force, and blade drives rotor rotation acting.Because the parameter of water vapor is higher; Still contain a large amount of heat energy in the gas after the acting, water vapor is after blade flows out, and continuing in the passage between return channel housing, return channel blade, return channel cone expands quickens; With remaining conversion of heat into kinetic energy, and change flow direction.Water vapor gets into the diverse location of blade again, because the molded lines of blade is symmetrical fully, water vapor continues the acting back and flows out.
Because blade 3 adopts complete symmetric type, water vapor can either get into acting from the front portion of blade, also can get into acting from the rear portion of blade.Adopted return channel housing 4, return channel blade 5, return channel cone 6 can change the direction that water vapor flows, the enthalpy drop value that the single-stage impeller can be born increases.Solve the enthalpy drop value restricted problem that steam turbine single-stage impeller can bear, under the condition that flow is little, parameter is high of water vapor, reduced the progression of steam turbine, simplified the structure, reduced cost.
The beneficial effect of the utility model is the enthalpy drop value that has improved steam turbine single-stage impeller, has reduced the structure of steam turbine, has reduced cost, utilizes the field to fill up blank at the water vapor of small flow, high parameter.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
Fig. 1 is a steam turbine partial admission device overall pattern, and 1 is nozzle among the figure, and 2 is rotor, and 3 is blade, and 4 is the return channel housing, and 5 is the return channel blade, and 6 is the return channel cone.
Fig. 2 (a) is nozzle profile figure, and arrow is the water vapor flow direction among the figure; Fig. 2 (b) is the nozzle area variation diagram of streamwise; Fig. 2 (c) is the nozzle cross-section figure perpendicular to flow direction.
Fig. 3 is rotor figure, and 3-1 is the single-stage impeller among the figure, and 3-2 is an axle.
Fig. 4 (a) is the blade plan view; Fig. 4 (b) is the blade plan view, and vane type line is symmetrical along the dotted line among the figure; Fig. 4 (c) is a row blade.
Fig. 5 is return channel housing figure, and 5-1 is a straight section among the figure, and 5-2 is the molded lines part, and 5-3 is the top.
Fig. 6 (a) is a return channel blade plan view, and Fig. 6 (b) is a return channel blade plan view, and 6-1 is the inner arc molded lines among the figure, and 6-2 is back of the body camber line.
Fig. 7 (a) is a return channel cone plan view, and Fig. 7 (b) is a return channel cone plan view, and 7-1 is a straight section among the figure, and 7-2 is the angled straight lines part, and 7-3 is the molded lines part.
Fig. 8 is the schematic representation of the passage one that forms between return channel housing, return channel blade, the return channel cone, passage two, passage three, and 8-1 is the passage one of shrink form, and 8-2 is the passage two of shrink form, and 8-3 is the passage three of expanded form.
Embodiment
As shown in the figure, the steam turbine partial admission device of the utility model is made up of nozzle 1, rotor 2, blade 3, return channel housing 4, return channel blade 5, return channel cone 6.The installation relation of each parts is: nozzle 1 is installed on the steam turbine, and blade 3 is installed on the single-stage impeller of rotor, and return channel housing 4, return channel blade 5, the return channel cone 6 common rotating channels of forming air-flow are installed on the cylinder of steam turbine.Under the situation that flow at water vapor is little, parameter is high, the acting process of water vapour is following:
1) the water vapor acceleration of in nozzle 1, expanding, the conversion of heat into kinetic energy of water vapor;
2) water vapor of high speed impacts blade 3, and blade 3 drives rotors 2 rotation actings;
3) water vapour after the acting gets in the passage of forming between return channel housing 4, return channel blade 5, the return channel cone 6, in passage one, passage two, passage three, with the remaining conversion of heat into kinetic energy of water vapour, and changes flow direction;
4) water vapor gets into the diverse location of blade 3 again, continues the acting back and flows out.
In actual application,,, can design according to the structural type of the utility model and make according to the acting process of water vapour in the utility model and the basic principle of steam turbine according to the different thermodynamic parameters and the flow of the water vapour of reality.
Claims (2)
1. a steam turbine partial admission device comprises nozzle (1), rotor (2), blade (3), return channel housing (4), return channel blade (5) and return channel cone (6); It is characterized in that: nozzle (1) is installed on the steam turbine, and blade (3) is installed on the single-stage impeller of rotor (2), and return channel housing (4), return channel blade (5) and return channel cone (6) are installed on the cylinder of steam turbine; Blade (3) is complete symmetrical blade, and molded lines is symmetrical fully in the front and back of blade, and a plurality of identical blade installation form a row blade on the single-stage impeller; Return channel cone (6) is made up of three parts: a part is circular arc molded lines part, and a part is the straight section parallel with impeller, and a part is the angled straight lines part; Form the passage one of shrink form between the back of the body camber line part of return channel blade (5) and the molded lines part of return channel housing (4); Form the passage two of shrink form between the inner arc molded lines part of return channel blade (5) and the circular arc molded lines part of return channel cone (6), form the passage three of expanded form between the angled straight lines part of return channel cone (6) and the straight section of return channel housing (4).
2. steam turbine partial admission device as claimed in claim 1, its characteristic also is: nozzle (1) is the nozzle of scaled version, the cross section of nozzle is a circular arc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201710254U CN202531246U (en) | 2012-04-20 | 2012-04-20 | Steam inlet device of turbine part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201710254U CN202531246U (en) | 2012-04-20 | 2012-04-20 | Steam inlet device of turbine part |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202531246U true CN202531246U (en) | 2012-11-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201710254U Expired - Fee Related CN202531246U (en) | 2012-04-20 | 2012-04-20 | Steam inlet device of turbine part |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202531246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661178A (en) * | 2012-04-20 | 2012-09-12 | 大连理工大学 | Partial steam admission device of steam turbine |
-
2012
- 2012-04-20 CN CN2012201710254U patent/CN202531246U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102661178A (en) * | 2012-04-20 | 2012-09-12 | 大连理工大学 | Partial steam admission device of steam turbine |
| CN102661178B (en) * | 2012-04-20 | 2014-08-27 | 大连理工大学 | Partial steam admission device of steam turbine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121114 Termination date: 20130420 |