CN210152738U

CN210152738U - Device for treating large expansion difference of low-pressure cylinder of steam turbine

Info

Publication number: CN210152738U
Application number: CN201920940726.1U
Authority: CN
Inventors: 江保东; 陈章印; 王磊; 杨涛; 邓浩杰; 雷联涛; 陈磊磊; 党守亮; 邓小青; 郭红松; 裴晓斐
Original assignee: Luoyang Wanji Power Co Ltd
Current assignee: Luoyang Wanji Power Co Ltd
Priority date: 2019-06-21
Filing date: 2019-06-21
Publication date: 2020-03-17
Anticipated expiration: 2029-06-21

Abstract

A device for processing the large expansion difference of a low-pressure cylinder of a steam turbine relates to the technical field of steam turbines and comprises a rotor, a front box and a front box supporting bedplate; the shaft body of the rotor is sleeved with a high-medium pressure cylinder, a rotor protection tile is arranged between the shaft body of the rotor and the high-medium pressure cylinder, the two end heads of the rotor are respectively connected with a front box, the two front boxes are respectively placed on the top surface of a front box supporting bedplate, and the rotor is respectively provided with a rotor lifting device; a jack is arranged below the high and medium pressure cylinder, two cylinder cats are respectively fixedly arranged on two end faces of the high and medium pressure cylinder, the two cylinder cats positioned on the same end face are connected with the corresponding front box in a clamping manner, the bottom faces of the cylinder cats are respectively correspondingly abutted against the top face of a supporting and adjusting cushion block, and a support for supporting the cylinder cats is respectively arranged on the outer sides of the supporting bedplate of the two front boxes; and the device can solve the problem of large expansion difference of the low pressure cylinder under the condition of not uncovering the high and medium pressure cylinders, thereby reducing the working period and saving the maintenance cost.

Description

Device for treating large expansion difference of low-pressure cylinder of steam turbine

Technical Field

The utility model belongs to the technical field of the steam turbine technique and specifically relates to a device for handling steam turbine low pressure cylinder differential expansion is big.

Background

As is known, a steam turbine is a main device of a modern thermal power plant, but in the working process of the steam turbine, the sliding performance of a sliding pin system or a bearing table plate is poor, and the situation of jam is easy to occur, so that the situation of large expansion difference of a low-pressure cylinder of the steam turbine occurs, the normal work of the steam turbine is further influenced, and in severe cases, parts such as a rotor and a cylinder in the steam turbine can be damaged; the traditional method for processing the large expansion difference of the low-pressure cylinder of the steam turbine comprises the steps of firstly disassembling the steam turbine, uncovering the pressure cylinder outside a rotor, then taking out the rotor, lifting the high-middle pressure cylinder, finally sliding out of a front box, and processing a sliding pin which is jammed at the bottom of a box body of the front box; however, after the problem of poor expansion of the low-pressure cylinder is solved by the method, the steam turbine needs to be assembled again, the steam seal needs to be readjusted in the assembling process, and the centers of structures such as a rotor partition plate and the like need to be recalibrated, so that the whole operation period is long, and the maintenance cost is very high because the steam turbine needs to be disassembled to match with various other devices; in view of the foregoing, there is a need in the market for a device that can be operated for a short period of time and at a low maintenance cost.

Disclosure of Invention

In order to overcome the not enough in the background art, the utility model discloses a device for handling the big difference of expansion of steam turbine low pressure cylinder.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a device for processing the large expansion difference of a low-pressure cylinder of a steam turbine comprises a rotor, a front box and a front box supporting bedplate; the shaft body of the rotor is sleeved with a high-medium pressure cylinder, a rotor protection tile is arranged between the shaft body of the rotor and the high-medium pressure cylinder, the two end heads of the rotor are respectively and correspondingly connected with a front box, the two front boxes are respectively placed on the top surface of a front box supporting bedplate, and two shaft necks of the rotor are respectively provided with a rotor lifting device; a jack is arranged below the high and medium pressure cylinder, two cylinder cats are respectively fixedly arranged on two end faces of the high and medium pressure cylinder, one end, far away from the high and medium pressure cylinder, of each cylinder cat claw on the same end face is connected with a corresponding front box in a clamping manner, the bottom face of one end, far away from the high and medium pressure cylinder, of each cylinder cat claw is correspondingly abutted against the top face of a supporting and adjusting cushion block, the supporting and adjusting cushion block is installed on the top face of a supporting bedplate of the corresponding front box, and a support for supporting the cylinder cat claws is respectively arranged on the outer side of each supporting bedplate of the two front;

preferably, the rotor lifting device is correspondingly matched with the shaft diameter of the rotor;

preferably, the rotor lifting device comprises a supporting plate, two hydraulic oil cylinders, two lifting rods and a base plate; the two hydraulic oil cylinders are respectively and vertically arranged on the top surface of the head end of the cat-claw of the air cylinder, the two ends of the supporting plate are respectively and correspondingly connected with the telescopic end of the hydraulic oil cylinder, the two lifting rods are respectively and vertically arranged on the two sides of the cylindrical surface of the rotor, the two lifting rods are arranged on the same vertical surface, the top ends of the two lifting rods are correspondingly and fixedly connected with the supporting plate, the bottom ends of the two lifting rods are correspondingly and fixedly connected with a bottom plate, the bottom plate is correspondingly and vertically arranged on the lifting rods, and the top surface of the bottom plate is provided with;

preferably, the bottom surface of backup pad is equipped with the percentage table, and the measuring stick of percentage table corresponds parallelly with the lifter, and the terminal of measuring stick corresponds with the cylinder of rotor and contradicts.

Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:

the utility model discloses a device for handling steam turbine low pressure jar differential expansion is big, lift up the rotor through rotor hoisting device, the outer wall that neither can make the rotor contacts with the inner wall of high-intermediate pressure jar, can demolish rotor protection tile again, the interval of rotor outer wall and high-intermediate pressure jar inner wall is bigger this moment, after jack-up high-intermediate pressure jar, can handle the sliding pin with the front cabinet roll-off, thereby solve the big problem of steam turbine low pressure jar differential expansion, consequently when implementing this method, need not reveal high-intermediate pressure jar, thereby make the operation time limit for a project reduce, and cost of maintenance has also obtained sparingly.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is another schematic structural diagram of the present invention.

In the figure: 1. a rotor; 2. a rotor protection tile; 3. a high and medium pressure cylinder; 4. a cylinder cat claw; 5. supporting and adjusting cushion blocks; 6. a front box; 7. a front box support deck; 8. a support plate; 9. a hydraulic cylinder; 10. a lifting bar; 11. a base plate; 12. a gasket; 13. a dial indicator; 14. and (6) measuring the rod.

Detailed Description

The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.

The device for processing the large expansion difference of the low-pressure cylinder of the steam turbine, which is described in the attached figures 1-2, comprises a rotor 1, a front box 6 and a front box supporting bedplate 7; the shaft body of the rotor 1 is sleeved with a high and medium pressure cylinder 3, a rotor protection tile 2 is arranged between the shaft body of the rotor 1 and the high and medium pressure cylinder 3, the two end heads of the rotor 1 are respectively and correspondingly connected with a front box 6, the two front boxes 6 are respectively placed on the top surface of a front box support bedplate 7, and two shaft necks of the rotor 1 are respectively provided with a rotor lifting device; furthermore, the rotor lifting device comprises a supporting plate 8, two hydraulic cylinders 9, two lifting rods 10 and a base plate 11; the two hydraulic oil cylinders 9 are respectively vertically arranged on the top surface of the head end of a cylinder cat-claw 4, the two ends of the support plate 8 are correspondingly and fixedly connected with the top surface of the hydraulic oil cylinders 9, the two lifting rods 10 are respectively vertically arranged on the two sides of the cylindrical surface of the rotor 1, the two lifting rods 10 are arranged on the same vertical surface, the top ends of the two lifting rods 10 are correspondingly and fixedly connected with the support plate 8, the support plate 8 is simultaneously jacked up through the two hydraulic oil cylinders 9, so that the support plate correspondingly drives the lifting rods 10 and the bottom plate 11 to ascend, further, one end of the rotor is lifted up, the situation that the rotor 1 inclines when the lifting rods 10 ascend can be prevented through the simultaneous action of the two hydraulic oil cylinders 9, the bottom ends of the two lifting rods 10 are correspondingly and fixedly connected with the bottom plate 11, the bottom plate 11 is correspondingly vertical to the lifting rods 10, the top surface of the bottom plate 11 is, the positioning function is realized; a jack is arranged below the high and medium pressure cylinder 3, two cylinder cats 4 are respectively fixedly arranged on two end faces of the high and medium pressure cylinder 3, one end, far away from the high and medium pressure cylinder, of each cylinder cat 4 on the same end face is connected with the corresponding front box 6 in a clamping manner, the bottom face, far away from the high and medium pressure cylinder 3, of each cylinder cat 4 is correspondingly abutted against the top face of a supporting and adjusting cushion block 5, and the supporting and adjusting cushion block 5 is arranged on the top face of a supporting platen 7 of the corresponding front box;

according to the requirement, the bottom surface of the supporting plate 8 is provided with the dial indicator 13, the measuring rod 14 of the dial indicator 13 is correspondingly parallel to the lifting rod 10, the tail end of the measuring rod 14 is correspondingly abutted against the cylindrical surface of the rotor 1, and the lifting height of the rotor 1 can be accurately measured through the dial indicator 13, so that the situation that the outer wall surface of the rotor 1 is correspondingly contacted with the inner wall surface of the high-medium pressure cylinder 3 due to the fact that the rotor 1 is lifted too high is prevented, and further the rotor 1 is damaged; the outer sides of the two front box supporting bedplate 7 are respectively provided with a support used for supporting the cylinder cat claws 4, and the cylinder cat claws 4 can be fixedly supported through the supports, so that the high-medium pressure cylinder 3 after the jack is loosened can be supported.

Implement a device for handling steam turbine low pressure cylinder differential expansion is big, at first lift up rotor 1's both ends simultaneously through rotor hoisting device, later lift up high intermediate pressure cylinder 3 through the jack, then demolish support adjustment cushion 5, last roll-off front box 6 utilizes the support with 4 fixed bolsters of cylinder cat claw.

The part of the utility model not detailed is prior art.

Claims

1. The utility model provides a device for handling that steam turbine low pressure cylinder differential expansion is big, characterized by: comprises a rotor (1), a front box (6) and a front box supporting bedplate (7); the high and medium pressure cylinder (3) is sleeved on a shaft body of the rotor (1), a rotor protection tile (2) is arranged between the shaft body of the rotor (1) and the high and medium pressure cylinder (3), two end heads of the rotor (1) are respectively and correspondingly connected with a front box (6), the two front boxes (6) are respectively placed on the top surface of a front box supporting bedplate (7), and two shaft necks of the rotor (1) are respectively provided with a rotor lifting device; the jack is arranged below the high-medium pressure cylinder (3), two cylinder claws (4) are fixedly arranged on two end faces of the high-medium pressure cylinder (3) respectively, one end, away from the high-medium pressure cylinder (3), of each cylinder claw (4) located on the same end face is clamped and connected with the corresponding front box (6), the bottom face, away from one end of the high-medium pressure cylinder (3), of each cylinder claw (4) is correspondingly abutted to the top face of a supporting and adjusting cushion block (5), the supporting and adjusting cushion block (5) is installed on the top face of the corresponding front box supporting bedplate (7), and supports used for supporting the cylinder claws (4) are arranged on the outer sides of the two front box supporting bedplates (7) respectively.

2. The apparatus for handling differential expansion of a low pressure cylinder of a steam turbine as claimed in claim 1, wherein: the rotor lifting device is correspondingly matched with the shaft diameter of the rotor (1).

3. The apparatus for handling differential expansion of a low pressure cylinder of a steam turbine as claimed in claim 2, wherein: the rotor lifting device comprises a supporting plate (8), two hydraulic oil cylinders (9), two lifting rods (10) and a bottom plate (11); two hydraulic cylinder (9) are installed perpendicularly respectively in the top face of a cylinder cat claw (4) head end, the bottom face both ends of backup pad (8) correspond with the flexible end of a hydraulic cylinder (9) respectively and are connected, two lifter bar (10) are vertical respectively and are located the both sides of rotor (1) cylinder, and two lifter bar (10) are located same vertical plane, the top and backup pad (8) of two lifter bar (10) correspond fixed connection, the bottom and a bottom plate (11) of two lifter bar (10) correspond fixed connection, bottom plate (11) correspond perpendicularly with lifter bar (10), the top face of bottom plate (11) is equipped with gasket (12) that correspond the adaptation with the axle journal of rotor (1).

4. The apparatus for handling differential expansion of a low pressure cylinder of a steam turbine as claimed in claim 3, wherein: the bottom surface of the supporting plate (8) is provided with a dial indicator (13), a measuring rod (14) of the dial indicator (13) is parallel to the lifting rod (10) correspondingly, and the tail end of the measuring rod (14) is abutted against the cylindrical surface of the rotor (1) correspondingly.