CN219587614U

CN219587614U - Steam sealing structure of steam turbine blade partition plate

Info

Publication number: CN219587614U
Application number: CN202223446146.8U
Authority: CN
Inventors: 王传昌; 王明; 王双阳; 刘东风
Original assignee: Suqian Hangzhong Intelligent Technology Co ltd
Current assignee: Suqian Hangzhong Intelligent Technology Co ltd
Priority date: 2022-12-22
Filing date: 2022-12-22
Publication date: 2023-08-25
Anticipated expiration: 2032-12-22

Abstract

The utility model discloses a steam sealing structure of a steam turbine blade partition plate, which comprises a sleeve cylinder and a rotor arranged in the sleeve cylinder through a partition plate, wherein a circular mounting groove is formed in the sleeve cylinder, a plurality of semicircular partition plates are axially arranged on the inner side of the mounting groove, the partition plates symmetrically arranged in the mounting groove up and down are sleeved on the outer side of the rotor, and the whole partition plate is of an annular structure. According to the utility model, a triple steam seal structure of the partition plate steam seal, the steam seal ring steam seal and the honeycomb steam seal is adopted, so that the air tightness of the steam turbine is increased, the abrasion between the partition plate and the rotor is reduced, and the steam seal effect is improved.

Description

Steam sealing structure of steam turbine blade partition plate

Technical Field

The utility model relates to the technical field of steam sealing devices, in particular to a steam sealing structure of a steam turbine blade partition plate.

Background

In the design of the steam turbine, in order to avoid accidents caused by collision between the rotor and the partition plates when the rotor rotates, a certain gap is reserved between the rotor impeller and the partition plates. In particular, in modern turbine sets, in order to increase the flexibility of the turbine, the axial gap between the rotor impeller and the partition plate is generally increased, but the conventional radial steam seal cannot meet the current practical situation, and the air leakage of the part is increased, so that the flow direction of the main air flow is disturbed, and the efficiency of the turbine is reduced.

Disclosure of Invention

According to the technical problem to be solved, the steam seal structure of the steam turbine blade partition plate is provided.

In order to achieve the aim, the utility model discloses a steam sealing structure of a steam turbine blade baffle plate, which comprises a sleeve cylinder and a rotor arranged in the sleeve cylinder through a baffle plate, wherein a circular mounting groove is arranged in the sleeve cylinder, a plurality of semicircular baffle plates are axially arranged on the inner side of the mounting groove, the outer side of the rotor is sleeved with the baffle plates which are symmetrically arranged in the mounting groove up and down, and the whole baffle plate is of an annular structure.

Further, the rotor is provided with a plurality of installation bosses along the axial direction, and the installation bosses are fixedly provided with blades.

Still further, be provided with the third draw-in groove in the installation boss, the blade joint is in the third draw-in groove.

Still further, the steam exhaust channel has been seted up to the horizontal position that the baffle corresponds the blade, and two sets of second draw-in grooves have been seted up at least to the baffle one side that is close to the rotor, the joint is fixed with the gland block in the second draw-in groove, the gland block is close to one side of rotor and is fixed with first vapour seal tooth.

Still further, the baffle right side is provided with the gland ring of slope, gland ring and rotor axis contained angle are not less than 40.

Furthermore, buffer gaps are arranged among the gland sealing ring, the first gland sealing teeth and the rotor.

Furthermore, a section of boss extends from the right side of the partition plate near the sleeve cylinder, at least two groups of honeycomb steam seal blocks are arranged on one side of the boss near the blade, and at least two groups of second steam seal teeth are arranged on the end face of the blade at the position corresponding to the honeycomb steam seal blocks.

Compared with the prior art, the utility model has the beneficial effects that: the utility model discloses a steam sealing structure of a steam turbine blade partition plate, which adopts a triple steam sealing structure of a partition plate steam seal, a steam sealing ring steam seal and a honeycomb steam seal, so that the air tightness of the steam turbine is improved, the abrasion between the partition plate and a rotor is reduced, and the steam sealing effect is improved.

Drawings

The utility model will be described in further detail with reference to the drawings and the detailed description.

Fig. 1 is a schematic view of a vapor seal structure of the present utility model.

Fig. 2 is a partial view a of fig. 1 in accordance with the present utility model.

In the figure: 1 is a sleeve cylinder; 11 is a first clamping groove; 2 is a separator; 21 is a steam seal block; 211 is a first steam seal tooth; 22 is a gland seal ring; 23 is a honeycomb steam seal block; 24 is a steam exhaust channel; 25 is a second slot; 3 is a rotor; 31 is an installation boss; 32 is a second card slot; 4 is a blade; and 41 is a second gland sealing tooth.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

An embodiment of the utility model, as shown in fig. 1 and 2, comprises a sleeve cylinder 1 and a rotor 3 arranged in the sleeve cylinder 1 through a baffle plate 2, wherein a circular installation groove is arranged in the sleeve cylinder 1, a plurality of semicircular baffle plates 2 are axially arranged on the inner side of the installation groove, the baffle plates 2 which are symmetrically arranged up and down in the installation groove are sleeved on the outer side of the rotor 3, the whole baffle plates 2 are of an annular structure, a three-stage steam sealing effect is provided in the working process of the steam turbine, and the sealing performance of the steam turbine is improved.

The rotor 3 is provided with a plurality of installation bosss 31 along the axial, is fixed with blade 4 on the installation boss 31, is provided with third draw-in groove 32 in the installation boss 31, and blade 4 joint is in third draw-in groove 32, simple to operate promotes blade structure fixed strength.

The steam exhaust channel 24 is arranged at the horizontal position of the partition plate 2 corresponding to the blades 4, at least two groups of second clamping grooves 25 are arranged on one side of the partition plate 2 close to the rotor 3, the steam seal block 21 is fixedly clamped in the second clamping grooves 25, first steam seal teeth 211 are fixedly arranged on one side of the steam seal block 21 close to the rotor 3, a first-stage steam seal structure is formed between the first steam seal teeth 211 and the rotor 3, and the steam seal effect is improved.

The right side of the partition plate 2 is provided with an inclined gland ring 22, and the included angle between the gland ring 22 and the axis of the rotor 3 is not smaller than 40 degrees, so that the included angle between the gland ring 22 and the axis of the rotor 3 is 45 degrees to form a secondary gland structure, and the gland effect is further improved.

Buffer gaps are arranged among the gland sealing ring 22, the first gland sealing teeth 211 and the rotor 3, so that the direct contact between the gland sealing teeth and the rotor 3 is avoided, the abrasion is reduced, the service life is prolonged, and the potential safety hazard is reduced.

The partition plate 2 right side is close to cover jar 1 department and extends one section boss, and one side that the boss is close to blade 4 is provided with two sets of honeycomb gland blocks 23, and the position that blade 4 terminal surface corresponds honeycomb gland block 23 is provided with two sets of second gland teeth 41, forms tertiary gland through the second gland teeth 41 on the blade 4 between honeycomb gland block 23, further promotes the gland effect, and honeycomb gland block 23 can not hurt the blade terminal surface owing to its regular hexagon mesh structure, reduces contact surface local pressure, does not make redundant description here as prior art.

The points to be described are: first, in the description of the present utility model, it should be noted that, unless otherwise specified and defined, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be mechanical or electrical, or may be a direct connection between two elements, and "upper," "lower," "left," "right," etc. are merely used to indicate relative positional relationships, which may be changed when the absolute position of the object being described is changed; second, relational terms such as first and second, and the like may be used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities.

The above examples are merely illustrative of the present utility model and are not meant to limit the scope of the present utility model, and all designs that are the same or similar to the present utility model are within the scope of the present utility model.

Claims

1. The utility model provides a steam turbine blade baffle gland structure, includes cover jar (1) and installs rotor (3) in cover jar (1) through baffle (2), a serial communication port, be provided with circular mounting groove in cover jar (1), a plurality of semicircular baffle (2) are installed along the axial to the mounting groove inboard, baffle (2) of symmetry installation about in the mounting groove have been cup jointed in rotor (3) outside, baffle (2) wholly are annular structure, and baffle (2) correspond the horizontal position of blade (4) and have offered exhaust channel (24), and baffle (2) are close to one side of rotor (3) and have offered two sets of second draw-in grooves (25) at least, the joint is fixed with gland block (21) in second draw-in groove (25), one side that gland block (21) are close to rotor (3) is fixed with first steam seal tooth (211), baffle (2) right side is close to cover jar (1) department and extends one section boss, one side that is close to blade (4) is provided with two sets of honeycomb blocks (23) at least, at least two honeycomb blocks (41) are provided with to gland block (4).

2. A steam sealing structure for a steam turbine blade diaphragm according to claim 1, wherein the rotor (3) is provided with a plurality of mounting bosses (31) in an axial direction, and the mounting bosses (31) are fixed with the blades (4).

3. A steam sealing structure for a steam turbine blade diaphragm according to claim 2, wherein a third clamping groove (32) is formed in the mounting boss (31), and the blade (4) is clamped in the third clamping groove (32).

4. A steam sealing structure for a steam turbine blade diaphragm according to claim 1, wherein an inclined sealing ring (22) is arranged on the right side of the diaphragm (2), and an included angle between the sealing ring (22) and the axis of the rotor (3) is not smaller than 40 °.

5. A steam sealing structure for a steam turbine blade diaphragm according to claim 4, wherein buffer gaps are provided between the steam sealing ring (22), the first steam sealing teeth (211) and the rotor (3).