CN201103425Y

CN201103425Y - T blade root used for high pressure cylinder blade of macrotype full rotary speed turbine

Info

Publication number: CN201103425Y
Application number: CNU2007201175649U
Authority: CN
Inventors: 张秋鸿; 周宏利; 金允铎; 钱国荣; 郑磊
Original assignee: Harbin Turbine Co Ltd
Current assignee: Harbin Turbine Co Ltd
Priority date: 2007-12-03
Filing date: 2007-12-03
Publication date: 2008-08-20
Anticipated expiration: 2017-12-03

Abstract

The utility model discloses a T-shaped blade root used in the blades of a high-pressure cylinder in a large full-speed turbine, relating to the blade root used in the blades of the high-pressure cylinder in the turbine, which solves the problems of small bearing capacity, low working efficiency and unsafe operation existed in the existing T-shaped blades of the turbine; the utility model consists of an upper neck (2) and a bottom of the blade root (3); the upper neck (2) is arranged on the bottom of the blade root (3) and the two parts are integrated into a whole; the width b1 of the upper neck (2) is 23mm and the height h1 is 22.68mm; the width b2 of the bottom of the blade root (3) is 44mm and the height h2 is 21.18mm; an upper chamfer E of the bottom of the blade root (3) is 1.5 * 45 degrees and a lower chamfer F of the bottom of the blade root (3) is 9 * 45 degrees. The T-shaped blade root reasonably determines the size of the blade root and facilitates the bearing capacity, the working efficiency and the safe operation of the blade root.

Description

The T shape blade root that a kind of large-scale full rotary speed steam turbine high-pressure cylinder blade uses

Technical field

The utility model relates to the blade root that a kind of steam turbine high-pressure cylinder blade uses.

Background technique

Along with the increase of thermal power steam turbine capacity, Large Steam Turbine Sets high-pressure cylinder blade all adopts T shape blade root usually, but existing T shape turbine blade bearing capacity is little, only is applicable to short blade.T shape turbine blade also exists inefficiency, the unsafe problem of working procedure simultaneously.

The model utility content

The purpose of this utility model is that the bearing capacity that existing T shape turbine blade exists is little in order to solve, inefficiency and the unsafe problem of working procedure, and then the T shape blade root that provides a kind of large-scale full rotary speed steam turbine high-pressure cylinder blade to use.

The technical solution of the utility model is: the T shape blade root that a kind of large-scale full rotary speed steam turbine high-pressure cylinder blade uses is made up of last neck and blade root bottom, and upper hind neck is deployed on the blade root bottom and with the blade root bottom and is connected as a single entity; The width b1 of last neck is 23mm, and the height h1 of last neck is 22.68mm, and the width b2 of blade root bottom is 44mm, and the height h2 of blade root bottom is 21.18mm.

The utlity model has following beneficial effect: the utility model is by calculating tensile stress, flexure stress, extrusion stress, total stress and the rim stress in T shape blade root cross section, reasonably determined the size of blade root, changed the blade root selection improper problem of stress concentration that cause of past, the Security that has improved bearing capacity, working efficiency and the working procedure of blade to large-scale full rotary speed steam turbine high-pressure cylinder blade use.The Security of design and high efficiency organically combine, and make the high-pressure cylinder blade that higher off design performance be arranged, thereby guarantee unit operation safely and efficiently under variable working condition.The utility model can be used as the blade root of wet cooling gas turbine groups such as subcritical, overcritical, the peak regulation of 300MW～600MW, no matter is in Economy, strength vibration characteristic, static strength and guarantees all reaching advanced level aspect the safety reliability of unit.

Description of drawings

Fig. 1 is an overall structure schematic representation of the present utility model, and Fig. 2 is the cooperating structure schematic representation of the utility model and race.

Embodiment

Embodiment one: present embodiment is described in conjunction with Fig. 1 and Fig. 2, present embodiment is made up of intermediate 1, last neck 2 and blade root bottom 3, last neck 2 places on the blade root bottom 3 and with blade root bottom 3 and is connected as a single entity, and intermediate 1 places on the neck 2 and with last neck 2 and is connected as a single entity; The width B z of intermediate 1 is 31.5mm, the bound feet width C of intermediate 1 is 4.25mm, the bound feet chamfering D of intermediate 1 is 1.2 * 45 °, the width b1 of last neck 2 is 23mm, the height h1 of last neck 2 is 22.68mm, the width b2 of blade root bottom 3 is 44mm, and the height h2 of blade root bottom 3 is 21.18mm.T shape blade root 4 and race 5 Spielpassung, intermediate 1 is 0.10～0.44mm with the matching gap a of race 5 left and right sides, matching gap b between the lower surface of intermediate 1 and the race 5 is 0.06～0.18mm, last neck 2 is 0.02～0.10mm with the matching gap c of race 5 left and right sides, blade root bottom 3 is 0.12～0.50mm with the matching gap d of race 5 left and right sides, described T shape blade root 4 belongs to along circumference tangentially assembles, blade is packed into to impeller steam output side direction by the steam admission side of impeller, and T shape blade root 4 is adopted the locking measure in race 5.Described T shape 2.6401 blade roots of present embodiment are applicable to wet cooling gas turbine groups such as subcritical, overcritical, the peak regulation of variable power scope 300MW-600MW grade.

Embodiment two: in conjunction with Fig. 1 present embodiment is described, the last chamfering E of the blade root bottom 3 of present embodiment is 1.5 * 45 °, and the following chamfering F of blade root bottom 3 is 9 * 45 °.The Security that has obviously improved bearing capacity, working efficiency and the working procedure of blade so is set.

Claims

1, a kind of T shape blade root of large-scale full rotary speed steam turbine high-pressure cylinder blade use, its is made up of last neck (2) and blade root bottom (3), and last neck (2) places on the blade root bottom (3) and with blade root bottom (3) and connects as one; It is characterized in that the described width b1 that goes up neck (2) is 23mm, the height h1 of last neck (2) is 22.68mm, and the width b2 of blade root bottom (3) is 44mm, and the height h2 of blade root bottom (3) is 21.18mm.

2, the T shape blade root of using according to the described a kind of large-scale full rotary speed steam turbine high-pressure cylinder blade of claim 1 is characterized in that the last chamfering E of described blade root bottom (3) is 1.5 * 45 °, and the following chamfering F of blade root bottom (3) is 9 * 45 °.