阅读说明：本技术 一种低参数饱和汽轮机双挠性支撑结构 (Double-flexible supporting structure of low-parameter saturated steam turbine ) 是由 宋禹林 曹世裕 王文婷 张昊然 于 2020-04-25 设计创作，主要内容包括：一种低参数饱和汽轮机双挠性支撑结构,本发明涉及一种汽轮机的支撑结构,本发明为解决现有的汽轮机支撑结构因润滑不畅容易导致滑销系统出现卡死现象,进而影响汽轮机安全运行的问题,本发明包括前汽缸、前轴承箱、横键、猫爪、前轴承箱支撑板和公用底座,前汽缸的下端设有猫爪,前轴承箱通过横键与猫爪连接,横键的下端设有前轴承箱支撑板,所述一种低参数饱和汽轮机双挠性支撑结构还包括双挠性板组件,所述双挠性板组件固定安装在前轴承箱支撑板的下表面和公用底座的上表面之间。本发明用于汽轮机技术领域,本发明整体提高了汽轮机的安全性、可靠性和维修性。(The invention relates to a double-flexible supporting structure of a low-parameter saturated steam turbine, which relates to a supporting structure of a steam turbine and aims to solve the problem that a sliding pin system is blocked easily due to poor lubrication of the conventional supporting structure of the steam turbine so as to influence the safe operation of the steam turbine. The invention is used in the technical field of steam turbines, and integrally improves the safety, reliability and maintainability of the steam turbine.)

1. The utility model provides a two flexible bearing structure of low parameter saturated steam turbine, it includes preceding cylinder (1), front bearing case (2), cross key (3), cat claw (4), front bearing case backup pad (5) and public base (6), the lower extreme of preceding cylinder (1) is equipped with cat claw (4), front bearing case (2) are connected with cat claw (4) through cross key (3), the lower extreme of cross key (3) is equipped with front bearing case backup pad (5), its characterized in that: the double-flexible supporting structure of the low-parameter saturated steam turbine further comprises a double-flexible plate assembly, and the double-flexible plate assembly is fixedly installed between the lower surface of the front bearing box supporting plate (5) and the upper surface of the common base (6).

2. The double flexible support structure of a low parameter saturated steam turbine according to claim 1, wherein: the double-flexible-plate assembly comprises two flexible plates (7), an upper connecting plate (8) and a lower connecting plate (9), the two flexible plates (7) are arranged side by side and in parallel, the upper ends of the two flexible plates (7) are fixedly connected with the lower surface of the upper connecting plate (8), and the lower ends of the two flexible plates (7) are fixedly connected with the lower connecting plate (9).

3. The double flexible support structure of a low parameter saturated steam turbine according to claim 2, wherein: the two flexible plates (7), the upper connecting plate (8) and the lower connecting plate (9) are integrally formed.

4. A double flexible support structure for a low parameter saturated steam turbine according to claim 2 or 3, wherein: each flexible plate (7) is a concave plate body.

5. The double flexible support structure of a low parameter saturated steam turbine according to claim 1, wherein: the double-flexible supporting structure of the low-parameter saturated steam turbine further comprises a first bolt (10), a first nut (11), a second bolt (12), a second nut (13) and a cushion block (14), and an upper connecting plate (8) is fixedly connected with a front bearing box supporting plate (5) through the first bolt (10) and the first nut (11); the lower connecting plate (9) is fixedly connected with the public base (6) through a second bolt (12), a second nut (13) and a cushion block (14).

Technical Field

The invention relates to a steam turbine supporting structure, in particular to a double-flexible supporting structure of a low-parameter saturated steam turbine, and belongs to the technical field of steam turbines.

Background

The steam turbine bearing structure is mostly the sliding pin system, and the operation of sliding pin system needs to have lubricating oil at the glide plane, and the regular injection lubricating oil has increased the maintenance and the maintenance work of steam turbine, and lubricated not smooth still can lead to the sliding pin system dead phenomenon of card to appear, makes the steam turbine inflation unable by the absorption, and then influences the steam turbine safe operation. And a single flexible supporting structure is adopted by some steam turbines, the force of a single flexible plate is weaker, and the eccentricity between the moving and static parts of the steam turbine is easily aggravated, so that the problems of rotor vibration and the like are caused.

Disclosure of Invention

The invention provides a double-flexible supporting structure of a low-parameter saturated steam turbine, aiming at solving the problem that the safe operation of a wheel is influenced because a sliding pin system is blocked easily due to poor lubrication of the conventional steam turbine supporting structure.

The technical scheme adopted by the invention for solving the problems is as follows:

the double-flexible supporting structure of the low-parameter saturated steam turbine comprises a front cylinder, a front bearing box, a transverse key, a cat claw, a front bearing box supporting plate and a common base, wherein the cat claw is arranged at the lower end of the front cylinder, the front bearing box is connected with the cat claw through the transverse key, the front bearing box supporting plate is arranged at the lower end of the transverse key, the double-flexible supporting structure of the low-parameter saturated steam turbine further comprises a double-flexible plate assembly, and the double-flexible plate assembly is fixedly arranged between the lower surface of the front bearing box supporting plate and the upper surface of the common base.

Furthermore, two flexplates subassembly includes two flexplates, upper junction plate and lower connecting plate, and two flexplates are parallel arrangement side by side, and the upper end of two flexplates all is connected with the lower surface fixed connection of upper junction plate, and the lower extreme of two flexplates all is connected with lower connecting plate fixed connection.

Further, the two flexible plates, the upper connecting plate and the lower connecting plate are integrally formed.

Further, each flexible plate is a concave plate body.

Furthermore, the double-flexible supporting structure of the low-parameter saturated steam turbine further comprises a first bolt, a first nut, a second bolt, a second nut and a cushion block, wherein the upper connecting plate is fixedly connected with the front bearing box supporting plate through the first bolt and the first nut; the lower connecting plate is fixedly connected with the public base through a second bolt, a second nut and a cushion block.

The invention has the beneficial effects that:

1. aiming at the small expansion amount of the low-parameter saturated steam turbine, the thermal expansion of the steam turbine is compensated by the deformation amount of the flexible plate, the contact of the supporting surface is tight without a gap, and the lateral and vertical displacement cannot be generated;

2. the double-flexible-plate structure replaces the traditional sliding pin system, the blocking risk is eliminated, lubricating oil does not need to be added to the flexible plate, and the overhauling and maintenance work is reduced;

3. the double-flexible-plate structure is adopted, the stress of the flexible plate is uniform, and the problems of overlarge vibration and the like caused by non-concentricity of a moving part and a static part due to a single flexible plate are solved;

4. the invention improves the safety, reliability and maintainability of the steam turbine as a whole.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a dual flex plate;

FIG. 3 is a schematic diagram of the position of the dual flexible plates in the cold and hot states.

In the figure:

1-front cylinder; 2-front bearing housing; 3-a transverse bond; 4-cat's claw; 5-front bearing housing support plate; 6-common base; 7-

A flexible board; 8, an upper connecting plate; 9-a lower connecting plate; 10-a first bolt; 11-a first nut; 12-a second bolt; 13-a second nut; 14-a cushion block; 15-a second bolt; 16-a second nut; 17-tail direction; 18-bow direction; 19-cold position of the flexible plate; 20-the hot position of the flexible plate.

Detailed Description