CN111396153A

CN111396153A - Steam turbine fixing device

Info

Publication number: CN111396153A
Application number: CN202010321584.8A
Authority: CN
Inventors: 韦俊; 姚福锋; 付兴伟; 王超
Original assignee: Grand New Power Co ltd
Current assignee: Grand New Power Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-07-10

Abstract

The utility model provides a steam turbine fixing device, belongs to steam turbine technical field to solve current steam turbine fixed adoption flexible support and cat claw structure, the rigidity is relatively poor, and the thermal expansion can only satisfy the unidirectional expansion, and there is the dead problem of card in long-time operation. The invention comprises a base, a transverse key, a guide key and two flexible plates, wherein the base is provided with a transverse groove and a guide groove, the transverse key is arranged in the transverse groove, the transverse key is in sliding fit with a groove at the bottom of a cat's claw of a cylinder, the guide key is arranged in the guide groove of the base in a sliding way, the guide key is fixedly connected with the bottom of the cylinder, the transverse key is arranged perpendicular to the axis of a rotor of a steam turbine, the guide key is arranged parallel to the axis of the rotor of the steam turbine, the two flexible plates are vertically fixed on the base in a splayed shape, and the two flexible plates are fixedly connected with the cylinder. The guide key arranged in the invention has a limiting effect on the transverse direction of the steam turbine, and the two flexible plates have a supporting effect and simultaneously meet the expansion requirements of the cylinder in two directions, so that the steam turbine is more stable and reliable to fix.

Description

Steam turbine fixing device

Technical Field

The invention relates to a steam turbine fixing device, and belongs to the technical field of steam turbines.

Background

The steam turbine fixing device not only fixes the steam turbine on the basis, but also ensures that each part of the steam turbine correctly expands, contracts and positions when the steam turbine starts, operates and stops, can bear the force and moment of each pipeline to the steam turbine, and ensures that the cylinder and the rotor are correctly centered. The magnitude of the force and moment that the turbine can bear the pipeline is related to the weight of the cylinder and the rigidity of the fixing device, and the larger the weight of the cylinder is, the better the rigidity of the fixing device is, and the larger the force and moment are. The turbine fixtures are mostly either sliding pin systems or flexible supports and cat-claw structures.

The sliding pin system generates increased axial thrust along with the increase of the weight of the steam turbine, and the deformation of the cylinder is influenced by the excessive axial thrust; in addition, the sliding pin system needs to be checked, cleaned and lubricated regularly, the change of the clearance of the guide key is noticed when the sliding pin system is started, measurement is carried out regularly to prevent the sliding pin system from being stuck, and the work of overhauling, maintenance and the like is increased. The flexible support and the cat's claw structure are less rigid, and in order to take longitudinal expansion into consideration, a certain gap is left at the cat's claw position during installation, but the phenomenon of blocking can also occur due to long operation time.

Disclosure of Invention

The invention provides a steam turbine fixing device, aiming at solving the problems that the existing steam turbine fixing device adopts a flexible support and a cat-claw structure, has poor rigidity and thermal expansion, can only satisfy single-direction expansion and is blocked after long-time operation.

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

the utility model provides a steam turbine fixing device, the on-line screen storage device comprises a base, the transverse key, guide key and two flexible boards, processing has transverse groove and guide way on the base, the transverse key sets up in the transverse groove, the groove sliding fit of transverse key and cylinder cat claw bottom, the guide key slides and sets up in the guide way of base, the guide key is in the same place with cylinder bottom rigid coupling, the axis setting of transverse key perpendicular to steam turbine rotor, the guide key is on a parallel with steam turbine rotor's axis setting, two flexible boards are "eight" font and fix on the base vertically, two flexible boards and cylinder fixed connection.

Compared with the prior art, the invention has the following beneficial effects:

the invention limits the axial movement of the cylinder through the transverse key, enables the cylinder to transversely move when being heated and expanded, and the two flexible plates play a supporting role.

The flexible plate plays a supporting role, when the cylinder expands under heat, the flexible plate bears the weight of the steam turbine, and the guide key ensures the safety and the stability of the steam turbine under the action of the force and the moment of the pipeline.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a view in the direction A of FIG. 1;

FIG. 3 is a top view of the rear support mount 1-2;

fig. 4 is a partial enlarged view at I of fig. 1.

Detailed Description

The invention will be described in further detail below with reference to the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation is given, but the scope of the present invention is not limited to the following embodiments.

Example 1: as shown in fig. 1-4, the embodiment relates to a steam turbine fixing device, which includes a base 1, a transverse key 2, a guide key 3 and two flexible plates 4, wherein the base 1 is processed with a transverse groove and a guide groove, the transverse key 2 is arranged in the transverse groove, the bottom of a catclaw of a cylinder 5 is processed with a groove, the transverse key 2 is in sliding fit with the groove at the bottom of the catclaw of the cylinder 5, the guide key 3 is arranged in the guide groove of the base 1 in a sliding manner, the guide key 3 is fixedly connected with the bottom of the cylinder 5, the transverse key 2 is arranged perpendicular to the axis of a steam turbine rotor, and plays a role in axial limiting for the cylinder 5, the guide key 3 is arranged parallel to the axis of the steam turbine rotor, the two flexible plates 4 are vertically fixed on the base 1 in an eight-shaped manner, and the two flexible plates 4 are.

Further, the base 1 comprises a front supporting seat 1-1, a rear supporting seat 1-2 and a connecting plate 1-3, a transverse groove is machined in the top of the front supporting seat 1-1, the transverse key 2 is arranged on the transverse groove of the front supporting seat 1-1, a guide groove is machined in the rear supporting seat 1-2, the guide key 3 is arranged in the guide groove in a sliding mode, the two flexible plates 4 are vertically fixed on the rear supporting seat 1-2, and the front supporting seat 1-1 and the rear supporting seat 1-2 are connected through the connecting plate 1-3.

Further, the top ends of the two flexible plates 4 are detachably connected with the steam turbine cylinder, and in this embodiment, the top ends of the two flexible plates 4 are connected with the cylinder 5 through screws.

Furthermore, a certain gap is formed between the bottom surface of the guide key 3 and the guide groove of the rear support seat 1-2. When the cylinder expands due to heating and is subjected to the action of the force and the moment of the cylinder by the pipeline when the steam turbine operates, the two flexible plates 4 are bent to play a supporting role, and the guide key 3 is transversely limited to increase the rigidity of the flexible plates 4.

Claims

1. A steam turbine fixing device which is characterized in that: the steam turbine rotor guiding device comprises a base (1), a transverse key (2), a guiding key (3) and two flexible plates (4), wherein a transverse groove and a guiding groove are machined in the base (1), the transverse key (2) is arranged in the transverse groove, the transverse key (2) is in sliding fit with a groove in the bottom of a cat claw of a cylinder (5), the guiding key (3) is arranged in the guiding groove of the base (1) in a sliding mode, the guiding key (3) is fixedly connected with the bottom of the cylinder (5), the transverse key (2) is perpendicular to the axis of a steam turbine rotor, the guiding key (3) is arranged in a mode of being parallel to the axis of the steam turbine rotor, the two flexible plates (4) are vertically fixed on the base (1) in a splayed mode, and the two flexible plates (4) are fixedly connected with the cylinder (5).

2. The steam turbine fixture of claim 1, wherein: the base (1) comprises a front supporting seat (1-1), a rear supporting seat (1-2) and a connecting plate (1-3), a transverse groove is machined in the top of the front supporting seat (1-1), a transverse key (2) is arranged in the transverse groove of the front supporting seat (1-1), a guide groove is machined in the rear supporting seat (1-2), the guide key (3) is arranged in the guide groove in a sliding mode, two flexible plates (4) are vertically fixed on the rear supporting seat (1-2), and the front supporting seat (1-1) and the rear supporting seat (1-2) are connected through the connecting plate (1-3).

3. The steam turbine fixture of claim 2, wherein: the top ends of the two flexible plates (4) are detachably connected with the cylinder (5).

4. The steam turbine fixture of claim 1, wherein: the bottom surface of the guide key (3) and the guide groove of the rear supporting seat (1-2) are arranged with a certain gap.