CN112720338B

CN112720338B - Large-interference stationary blade ring dismounting device of gas turbine

Info

Publication number: CN112720338B
Application number: CN202011523478.4A
Authority: CN
Inventors: 周媛媛
Original assignee: Csic Longjiang Gh Turbine Co ltd
Current assignee: Csic Longjiang Gh Turbine Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2023-03-21
Anticipated expiration: 2040-12-22
Also published as: CN112720338A

Abstract

The invention aims to provide a large-interference stationary blade ring dismounting device for a gas turbine, which comprises a supporting main body, a pull disc, a top plate and a hook, wherein the supporting main body comprises an upper base and a lower base, the lower base is arranged below the upper base through a connecting rib, the supporting main body falls on the pull disc, one end of the top plate is arranged on the pull disc through a bolt, the other end of the top plate is provided with a long bolt, the hook comprises a fixed plate, a connecting rod and a hook which are sequentially connected, the fixed plate is fixed on the pull disc, the edge of the pull disc is provided with a hook slotted hole, the connecting rod extends into the position below the pull disc through the hook slotted hole, and the hook is positioned below the pull disc. In the past, manual operation is needed when the large-interference stationary blade ring is disassembled, the space is small, the large-interference stationary blade ring is inconvenient to disassemble, the stationary blade ring is easily damaged by knocking vigorously, and time and labor are consumed when four persons are needed to operate simultaneously. The invention solves the problem that the force is dispersed to act on the draw hook by rotating the wrench, the draw hook drives the stationary blade ring to complete the disassembly work, time and labor are saved, and the safety and no damage of the stationary blade ring in the disassembly process are ensured.

Description

Large-interference stationary blade ring dismounting device of gas turbine

Technical Field

The invention relates to a dismounting device, in particular to a dismounting device of a gas turbine.

Background

The low-pressure outlet static blade ring is the only static blade ring with large interference fit in the gas turbine assembly industry, the interference size is about 0.2mm, the conventional manual operation is used, so that the low-pressure outlet static blade ring is inflexible to disassemble and weak in replaceability, and the economic cost and the construction period of disassembling and repairing are relatively high.

Disclosure of Invention

The invention aims to provide a dismounting device for a large-interference stationary blade ring of a gas turbine, which solves the problems of inflexible manual dismounting, poor replaceability and the like.

The purpose of the invention is realized as follows:

the invention discloses a large-interference stationary blade ring dismounting device of a gas turbine, which is characterized in that: including supporting the main part, arm-tie, roof, drag hook, supporting the main part and including last base and lower base, the base is the annular down, and the base passes through the connecting rib to be set up in last base below down, evenly distributed between the connecting rib, supports the main part and falls on the arm-tie, and the bolt is passed through to the one end of roof and installs on the arm-tie, and other end installation stay bolt drives the arm-tie through stay bolt upwards or downstream, the drag hook is including consecutive fixed plate, connecting rod and hook, and the fixed plate is fixed on the arm-tie, and the edge of arm-tie sets up the drag hook slotted hole, and the connecting rod stretches into the arm-tie below through the drag hook slotted hole, and the hook is located the below of arm-tie.

The present invention may further comprise:

1. the hole is arranged in the middle of the upper base of the supporting main body, the stud is arranged in the middle of the pull disc and extends out of the hole, the wrench is installed on the stud outside the hole, and the pull disc is driven to move up and down through rotating the wrench.

2. When dismantling quiet leaf ring, with the supporting body, the disc pull falls on being equipped with big surplus quiet leaf ring's quick-witted casket, lower base and the laminating of quick-witted casket flange terminal surface and fixed with the supporting body, the position of adjustment roof makes every stay bolt all push up on the lower base of supporting body, later it is fixed with the roof, during the installation drag hook, the hook of every drag hook all hooks on quiet leaf ring outer ring bottom and the drag hook is fixed, rotating stay bolt one by one, make the disc pull promote, every rotating round all keeps the length that every stay bolt revolves out the same, this operation is repeated until quiet leaf ring is higher than the quick-witted casket and reaches the distance of settlement, and surpass the highly uniform on the circumferencial direction, rotating spanner makes the disc pull promote until quiet leaf ring breaks away from the quick-witted casket completely.

The invention has the advantages that: the manual operation is needed when the large-surplus stator blade ring is disassembled, and the defects that the space is small, the stator blade ring is inconvenient to disassemble, the stator blade ring is easy to damage due to heavy knocking, and time and labor are consumed when four persons are needed to operate simultaneously are overcome. The invention solves the problem that the operation can be carried out by one person, the force is dispersed and acted on 18 drag hooks by rotating the wrench, the drag hooks drive the stationary blade ring to complete the disassembly work, the time and the labor are saved, and the safety and the no damage of the stationary blade ring in the disassembly process are ensured.

Drawings

FIG. 1a is a schematic structural view of the present invention, and FIG. 1b is a side view of the present invention;

FIG. 2a is a schematic structural view of the support body, and FIG. 2b is a side view of the support body;

fig. 3a is a schematic structural view of a pull disc, and fig. 3b is a side view of the pull disc;

FIG. 4a is a schematic structural diagram of a top plate, and FIG. 4b is a top view of the top plate;

FIG. 5a is a schematic view of the retractor, and FIG. 5b is a side view of the retractor;

fig. 6a is a schematic structural view of the wrench, and fig. 6b is a top view of the wrench.

Detailed Description

The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:

with reference to fig. 1a-6b, a gas turbine large-interference stationary blade ring dismounting device mainly comprises a support main body 1, a pull disc 2, M20 × 120 outer hexagon bolts 3, a top plate 4, M20 × 30 outer hexagon bolts 5, a drag hook 6, M8 × 25 outer hexagon bolts 7 and a wrench 8. The support main body 1 integrally adopts a welding structure and falls on the pull disc 2 during installation, the top plate 4 is connected with the pull disc 2 through an M20X 30 outer hexagon bolt 5, and the draw hook 6 is connected with the pull disc 2 through an M8X 25 outer hexagon bolt 7.

The top plate 4 and the draw hook 6 need to be subjected to thermal treatment quenching and tempering for ensuring the hardness requirement, and the hardness of the quenched and tempered material needs to meet the requirement of HRC 31-35.

Spanner 8 adopts screw-thread fit with drawing dish 2, drives drawing dish 2 through rotatory spanner 8 and reciprocates.

One end of the drag hook 6 is fixed on the pull disc 2 through an M8 multiplied by 25 outer hexagon bolt 7, and the other end is used for hooking the stationary blade ring and moves upwards or downwards along with the pull disc 2.

One side of the top plate 4 is fixed on the pull disc 2 through an M20X 30 outer hexagon bolt 5, and one side drives the pull disc 2 to move upwards or downwards together by rotating the M20X 120 outer hexagon bolt 3.

The device is first dropped onto a casing with a large excess stator blade ring, wherein the draw hooks 6 and the M8 × 25 outer hexagon bolts 7 are temporarily not installed. The flange surface on the supporting main body 1 is attached to the flange end surface of the casing, the casing is fixed through 8M 14 bolts, the radial movement of the device on the casing is prevented, the position of the top plate 4 is adjusted to enable each M20 x 120 outer hexagonal bolt 3 to be propped against the flange surface of the supporting main body 1, and after the position is adjusted, the M20 x 30 outer hexagonal bolts 5 are screwed down to fix the top plate 4. Installing the draw hooks 6 and the M8 multiplied by 25 outer hexagon bolts 7, ensuring that each draw hook 6 is hooked on the bottom edge of the outer ring of the stationary blade ring, and screwing the M8 multiplied by 25 outer hexagon bolts 7 to fix the draw hooks after checking and determining that all the draw hooks hook the outer ring of the stationary blade ring because the positions, which can be contacted by the draw hooks, of the bottom edge of the outer ring of the stationary blade ring are only 3 mm. Rotating the M20X 120 outer hexagon bolts 3 one by one to slowly lift the pull disc 2, keeping the same length of each screw rotated out every turn, repeating the operation until the stationary blade ring is about 5mm higher than the casing and the exceeding height in the circumferential direction is consistent, then rotating the wrench 8 to quickly lift the pull disc 2 until the stationary blade ring is about 75mm higher than the casing, and at the moment, slowly rotating the wrench 8 until the stationary blade ring is completely separated from the casing.

Claims

1. The utility model provides a big interference quiet leaf ring dismounting device of gas turbine, characterized by: the support main body comprises an upper base and a lower base, the lower base is annular, the lower base is arranged below the upper base through connecting ribs, the connecting ribs are uniformly distributed, the support main body is arranged on the pull disc, one end of the top plate is installed on the pull disc through a bolt, a long bolt is installed at the other end of the top plate, the pull disc is driven to move upwards or downwards through the rotation of the long bolt, the pull hook comprises a fixing plate, a connecting rod and a hook which are sequentially connected, the fixing plate is fixed on the pull disc, a pull hook groove hole is formed in the edge of the pull disc, the connecting rod extends into the position below the pull disc through the pull hook groove hole, and the hook is located below the pull disc;

a hole is formed in the middle of an upper base of the support main body, a stud is arranged in the middle of the pull disc and extends out of the hole, a wrench is installed on the stud outside the hole, and the pull disc is driven to move up and down by rotating the wrench;

when the fixed blade ring is disassembled, the supporting body and the pull disc fall on the casing provided with the large-overarching fixed blade ring, the lower base of the supporting body is attached to the flange end face of the casing and fixed, the position of the top plate is adjusted to enable each long bolt to be pushed against the lower base of the supporting body, then the top plate is fixed, when the drag hook is installed, the hook of each drag hook is hooked on the outer ring bottom of the fixed blade ring and fixed through the drag hook, the long bolts are rotated one by one, the pull disc is lifted, the length of each long bolt rotated out is kept the same for each rotation circle, the operation is repeated until the fixed blade ring is higher than the casing to reach the set distance, the exceeding height in the circumferential direction is consistent, and the pull disc is lifted by the rotating wrench until the fixed blade ring is completely separated from the casing.