CN201078245Y

CN201078245Y - Single-stage double-flow steam turbine

Info

Publication number: CN201078245Y
Application number: CNU2007201106668U
Authority: CN
Inventors: 程建平; 郑群
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-15
Filing date: 2007-06-15
Publication date: 2008-06-25
Anticipated expiration: 2017-06-15

Abstract

The utility model relates to a steam turbine, in particular to a steam turbine double-flow steam turbine, which can counteract the produced axial force. The rotor comprises a main shaft and an integral wheel integrated with the main shaft; wherein, a biserial endocentric shaft flow crankle curved vane is arranged on a circumferential surface of the integral wheel, a V-shaped integral baffle plate surface is formed from an inlet to an outlet of the endocentric shaft flow crankle curved vane and an upper case body of a cylinder, forming an internal air flow passage in the steam turbine. The utility model has the advantages of novel structure, few assembly parts, simple and compact structure, light weight, high intensity of high speed rotation, good rigidity, cancellation of the axial thrust of the rotor and safe, stable and reliable high speed operation.

Description

The single-stage double-flow turbine

Technical field

The utility model relates to a kind of steam turbine, especially can offset the single-stage double-flow turbine of the axial force of generation.

Background technique

At present, steam turbine is now by increasing sector application, the power of steam turbine is also developing toward big direction, but powerful steam turbine can seem when mini-plants such as drive motor or pump and waste one's talent on a petty job, the power of steam turbine can not be brought into play, with to have the transfer pump build after transfer pump etc. links to each other big, rotating speed and efficient are low, floor space is big, raw materials consumption is many, the shortcoming that cost of production is high, especially the application to high speed pump is to improve rotating speed by gear speeder at present, has increased the complexity of system thus, and reliability is low, the operating cost height is safeguarded problems such as inconvenience.

Summary of the invention

The utility model has solved the above-mentioned shortcoming that prior art exists, and provides a kind of volume little, single-stage double-flow turbine simple in structure.

The utility model has also solved the shortcoming that exists axial force not offset in the prior art, and a kind of single-stage double-flow turbine that can effectively offset axial force is provided.

Its technical problem that solves the utility model adopts the ground technological scheme to be: a kind of single-stage double-flow turbine, comprise cylinder casing, rotor and bearing housing, wherein, described rotor constitutes by being provided with an integrated type impeller on main shaft and the main shaft at least, the integrated type impeller is provided with the entad bent blade of rotating shaft stream bending of symmetrical biserial, constitute steam turbine internal gas flow passage from import to the outlet and the cylinder upper shell forming V-shape integrated type separator face of the bent blade of the stream of rotating shaft entad bending, the inlet of the bent blade of entad rotating shaft stream bending of impeller is provided with the biserial stator blade, the import of the steam flow runner that the bent blade of entad rotating shaft stream bending forms is aimed in the outlet of the nozzle that two stator blades constitute, and is provided with air chamber in the inlet of biserial stator blade.For the power that improves steam turbine can increase the integrated type impeller on main shaft, the side face of impeller is provided with the bent blade of entad rotating shaft stream bending of symmetry, and the direction of axial force is relative in the time of can making steam flow flow through the integrated type impeller, makes it to cancel out each other; The biserial stator blade is located at air chamber and entad between the import of the bent leaf blade of rotating shaft stream bending, constitute nozzle between the two biserial stator blades, can be positioned in the cylinder lower shell body groove by 2 above biserial stator blades, biserial stator blade quantity can require increase and decrease according to degree of partial admission; Cylinder is divided into two housings up and down, and cylinder is intermediate portion admission, double fluid impulsion rotor, biserial exhaust hood structure, and V-arrangement dividing plate and cylinder upper shell are one, also can link to each other with cylinder casing with fastening piece with upper clapboard by 2.

Steam turbine is cylinder lower shell body, cylinder upper shell, rotor, packing assembly, bearing housing upper shell, combined type steam valve, regulates linkage mechanism, supporting base, electronic oil cylinder, speed shutoff linkage mechanism, electromagnetic driver along the structure of left-to-right.

Be monobloc forging formula rotor structure between rotor main shaft and the integrated type impeller, also can will adopt key to be connected between integrated type impeller and the main shaft by structural requirement.

As preferably, the bent blade of described entad rotating shaft stream bending can be arranged by equal length, also can long and shortly be staggered.

Described integrated type impeller is tapered, and middle diameter is greater than the diameter of both sides, and entad the import of the runner of the bent blade composition of rotating shaft stream bending and the axis normal of main shaft export the parallel axes with main shaft.Steam flow acting stage in cylinder, to be steam flow entered into the runner that the bent blade of entad rotating shaft stream bending is formed from the direction of vertical major axis, entad acting, and the outlet of the runner of forming from the bent blade of rotating shaft stream bending is entad flowed out and is entered the steam discharge runner.

Described V-arrangement dividing plate separates integrated type impeller and steam discharge runner, on steam discharge runner and the impeller side face entad the outlet of the runner that forms of the bent blade of rotating shaft stream bending link to each other.

As preferably, described air chamber has surrounded the girth of impeller 30%～45%, and housing separates the outlet of the runner that air chamber and the bent blade of rotating shaft stream bending entad form.The air chamber of employing local envelopment integral wheel can be local earlier stressed when starting, and starts more smooth.

The outlet port of the runner that the bent blade of described entad rotating shaft stream bending forms is annular biserial exhaust hood, and the outlet of biserial exhaust hood merges into one.

Described stator blade is fixed on the steam turbine shell, and the import of the runner of the bent blade composition of entad rotating shaft stream bending is aimed in the outlet of the passage that stator blade is formed.

Below steam turbine, be provided with and regulate actuator, constitute by combined type steam valve, adjusting linkage mechanism, supporting base, electronic oil cylinder, speed shutoff linkage mechanism, electromagnetic driver, lead bearing support, electronic oil cylinder fitting seat.

The beneficial effects of the utility model are: novel structure, assembly parts are few, simple and compact for structure, in light weight, high speed rotating has big, the good rigidly of intensity, rotor axial thrust is cancelled out each other, because the entad rotating shaft stream on the integrated type impeller and axial flow leave heart bending song blade and impeller for being rigidly connected, have very strong anti-hypervelocity, antivibration, shock resistance, so high speed operation safety and stability reliability height, through-flow axially and radial dimension little, in light weight, make simple and convenient, material consumption quantity is few, with short production cycle, low cost of manufacture is safeguarded with easy to maintenance.Particularly working medium has in through-flow transfer process of steam turbine that energy loss is little, efficient is high, especially also is not easy to cause the generation of accidents such as rotor damage when running into rotor overspeed, oscillation phenomenon.

Description of drawings

Fig. 1 is a kind of structural representation of the utility model;

Fig. 2 is vertical A-A split view among Fig. 1;

Fig. 3 is a B-B cross-section structure sectional view among Fig. 1;

Fig. 4 is through-flow cross-section structure zoomed-in view among Fig. 3;

Fig. 5 be among Fig. 3 E to the external form topology view;

Fig. 6 regulates actuator's view among Fig. 5;

Fig. 7 be among Fig. 6 F to the external form topology view;

Fig. 8 is through-flow longitudinal profile workflow of a radial double-flow turbine principle diagrammatic sketch among Fig. 1;

Fig. 9 is through-flow B-B section of a radial double-flow turbine workflow principle diagrammatic sketch among Fig. 1;

Among the figure: arrow is represented the flow direction of steam flow, 1, the cylinder lower shell body, 2, the cylinder upper shell, 3, rotor, 4, the packing assembly, 6, the bearing housing upper shell, 18, biserial exhaust hood, 19, biserial stator blade, 20, air chamber, 23, the bearing housing lower shell body, 26, screw tightening, 27, the bent blade of rotating shaft stream bending entad, 28, positioning key, 32, safe exhaust steam valve, 33, combined type steam valve, 34, regulate linkage mechanism, 35, supporting base, 36, electronic oil cylinder, 37, speed is turn-offed linkage mechanism, 38, electromagnetic driver, 39, the lead bearing support, 40, electronic oil cylinder fitting seat.

Embodiment

Below by specific embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.

Embodiment: the single-stage double-flow turbine comprises devices such as cylinder, rotor 3, bearing housing, combined type steam valve 33, adjusting actuator.

Cylinder is divided into cylinder upper shell 1 and cylinder lower shell body 2, inside is provided with packing assembly 4, positioning key 28, safe exhaust steam valve 32 etc., rotor 3 is made of an integrated type impeller that is provided with on main shaft and the main shaft, adopt monobloc forging formula rotor structure between rotor main shaft and the integrated type impeller, the integrated type impeller is tapered, middle diameter is greater than the diameter of both sides, the integrated type impeller is provided with the length of symmetry, short staggered biserial is the bent blade 27 of rotating shaft stream bending entad, entad the import of the runner of the bent blade composition of rotating shaft stream bending and the axis normal of main shaft export the parallel axes with main shaft.

Constitute steam turbine internal gas flow passage from import to the outlet and the cylinder upper shell forming V-shape integrated type separator face of the bent blade of the stream of rotating shaft entad bending, the V-arrangement dividing plate separates integrated type impeller and steam discharge runner, on steam discharge runner and the impeller side face entad the outlet of the runner that forms of the bent blade of rotating shaft stream bending link to each other, be provided with biserial stator blade 19 between the import of the bent blade of entad rotating shaft stream bending of impeller and the air chamber, constitute nozzle between the two biserial stator blades, the import of the steam flow runner that the bent blade of entad rotating shaft stream bending forms is aimed in the outlet of nozzle, is provided with air chamber 20 in the inlet of biserial stator blade.

Air chamber has surrounded the girth of impeller 40%, housing separates air chamber and the entad outlet of the runner of the bent blade formation of rotating shaft stream bending, entad the outlet port of the runner of the bent blade formation of rotating shaft stream bending is annular biserial exhaust hood 18, and the outlet of biserial exhaust hood merges into one.

Bearing housing is made up of 2 housings, is respectively bearing housing upper shell 6 and bearing housing lower shell body 23, and the upper and lower two housings split of bearing housing is linked to each other by fastening piece.

Below steam turbine, be provided with and regulate actuator, constitute by combined type steam valve 33, adjusting linkage mechanism 34, supporting base 35, electronic oil cylinder 36, speed shutoff linkage mechanism 37, electromagnetic driver 38, lead bearing support 39, electronic oil cylinder fitting seat 40.Link to each other by regulating linkage mechanism between electronic oil cylinder piston bar and the combined vapor valve regulation valve rod, thread off in the main stop valve with electromagnetic driver between turn-off linkage mechanism by speed and link to each other, adopt fastening piece to link to each other between electronic oil cylinder and electronic oil cylinder fitting seat and the bearing housing upper shell, link to each other by fastening piece between electromagnetic driver and the bearing housing upper shell.

The working procedure of this embodiment, the transformation of energy that is about to high pressure steam are that the process of mechanical energy and output is as follows:

High pressure steam enters air chamber 20 through combined type steam valve 33 and arrives the nozzle inlet that biserial stator blade 19 constitutes, steam enters in the nozzle flow channel that the biserial stator blade forms and at flow process steam is expanded gradually, high velocity vapor stream after the expansion flows to the bent linear leaf import of entad rotating shaft stream bending from jet expansion, flow to the heart with sub-thread and spray the rotation of impulsion rotor, sub-thread stream high speed steam flow flow to the bent short blade of entad rotating shaft stream bending inlet and then is divided into double fluid and continues to flow to outlet in the bent blade 27 of rotating shaft stream bending entad and discharge, steam at the flow process rotor by red switch, also be that enthalpy acting process falls in steam under certain degree of reaction, rotation under the expansion steam flow of rotor under the impulsion of entad spraying steam flow and in the blade passage promotes, steam after the acting is discharged into biserial exhaust hood 18 from the bent blade exit of the stream of rotating shaft entad bending, has promptly finished an entad rotating shaft stream level transformation of energy.

Make band induce wheeled impeller high speed rotating under turbine rotor drives, fluid enters receded disk impeller from the import of the pump Variable-pitch Inducers of flowing through, the centrifugal force that is produced by the impeller upper blade with fluid pressurized after outside the rear pump.

Claims

1. single-stage double-flow turbine, comprise cylinder casing, rotor and bearing housing, it is characterized in that described rotor (3) constitutes by being provided with an integrated type impeller on main shaft and the main shaft at least, the integrated type impeller is provided with the entad bent blade (27) of rotating shaft stream bending of symmetrical biserial, constitute steam turbine internal gas flow passage from import to the outlet and cylinder upper shell (2) the forming V-shape integrated type separator face of the bent blade of the stream of rotating shaft entad bending, the inlet of the bent blade of entad rotating shaft stream bending of impeller is provided with biserial stator blade (19), the import of the steam flow runner that the bent blade of entad rotating shaft stream bending forms is aimed in the outlet of the nozzle that two stator blades constitute, and is provided with air chamber (20) in the inlet of biserial stator blade.

2. single-stage double-flow turbine according to claim 1 is characterized in that the bent blade of described entad rotating shaft stream bending can arrange by equal length, also can long and shortly be staggered.

3. single-stage double-flow turbine according to claim 1 and 2, it is characterized in that described integrated type impeller is tapered, middle diameter is greater than the diameter of both sides, and entad the import of the runner of the bent blade composition of rotating shaft stream bending and the axis normal of main shaft export the parallel axes with main shaft.

4. single-stage double-flow turbine according to claim 1 is characterized in that described V-arrangement dividing plate separates integrated type impeller and steam discharge runner, on steam discharge runner and the impeller side face entad the outlet of the runner that forms of the bent blade of rotating shaft stream bending link to each other.

5. single-stage double-flow turbine according to claim 1 is characterized in that described air chamber has surrounded the girth of impeller 30%～45%, and housing separates air chamber and the entad outlet of the runner of the bent blade formation of rotating shaft stream bending.

6. single-stage double-flow turbine according to claim 1 is characterized in that the outlet port of the runner that the bent blade of described entad rotating shaft stream bending forms is an annular biserial exhaust hood (18), and the outlet of biserial exhaust hood merges into one.

7. single-stage double-flow turbine according to claim 1 and 2 is characterized in that described biserial stator blade is fixed on the steam turbine shell, and the import of the runner of the bent blade composition of entad rotating shaft stream bending is aimed in the outlet of the passage that stator blade is formed.