CN212508446U

CN212508446U - Steam turbine partition plate sealing device

Info

Publication number: CN212508446U
Application number: CN202021039989.4U
Authority: CN
Inventors: 周始航
Original assignee: Ningbo Sinosteel Technology Co ltd
Current assignee: Ningbo Sinosteel Technology Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-02-09
Anticipated expiration: 2030-06-09

Abstract

The utility model discloses a steam turbine baffle sealing device, which comprises a cylinder, the inside ring connected in star that is provided with of cylinder, the inside baffle rim that is provided with of ring connected in star, the inside fixed nozzle piece outer loop of the inside fixedly connected with of baffle rim, the inside fixedly connected with nozzle of fixed nozzle piece outer loop, the inside fixed nozzle piece inner loop of fixedly connected with of nozzle, baffle and lower baffle are gone up to the inside fixedly connected with of fixed nozzle piece inner loop, all be provided with fixing bolt on going up baffle and the lower baffle, fixing bolt on going up the baffle and the fixing bolt on the lower baffle pass through half-round key fixed connection, go up baffle below fixedly connected with center pin. The utility model discloses in, need not to make and assemble through interference fit between each mechanism, the assembly is simple, and sealing performance between each mechanism is better, and can reduce the mechanism wearing and tearing that machine vibration caused better, is worth promoting.

Description

Steam turbine partition plate sealing device

Technical Field

The utility model relates to a steam turbine spare part design field especially relates to a steam turbine baffle sealing device.

Background

The steam turbine is also called as a steam turbine engine and is a rotary steam power device, high-temperature and high-pressure steam passes through a fixed nozzle to become accelerated airflow and then is sprayed onto blades, so that a main shaft provided with a blade row rotates and simultaneously works outwards; wherein, the steam turbine consists of a rotating part and a static part; the rotating part comprises a main shaft, an impeller, a moving blade, a coupling and the like; the static part comprises a steam inlet part, a cylinder, a clapboard, a static blade grid, a steam seal, a bearing and the like; meanwhile, the partition plate is used for dividing the cylinder into a plurality of air chambers, the partition plate generally comprises two semicircular plates, and the two semicircular plates can form the circular partition plate after being sleeved on the main shaft and fixed together.

Because the leakproofness of baffle is guaranteed to present steam turbine, often need adopt interference fit between each work piece, this makes the installation very troublesome, and the baffle all can receive the influence of machine vibrations usually in the use, makes wearing and tearing appear between the work piece, leads to the leakproofness to descend to make steam turbine power descend.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a steam turbine partition plate sealing device.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a steam turbine partition plate sealing device comprises a cylinder, wherein a circular groove is arranged in the cylinder, a baffle plate wheel rim is arranged in the circular groove, a sealing strip is arranged between the circular groove and the baffle plate wheel rim, the inner part of the rim of the clapboard is fixedly connected with a fixed nozzle sheet outer ring, the inner part of the fixed nozzle sheet outer ring is fixedly connected with a nozzle, the inner part of the nozzle is fixedly connected with a fixed nozzle sheet inner ring, the inner part of the fixed nozzle sheet inner ring is fixedly connected with an upper clapboard and a lower clapboard, the upper baffle plate and the lower baffle plate are both provided with fixing bolts, the fixing bolts on the upper baffle plate and the fixing bolts on the lower baffle plate are fixedly connected through a semicircular key, a central shaft is fixedly connected below the upper partition plate, the left side and the right side of the central shaft are both fixedly connected with a coupler, the lower end of the upper baffle plate is provided with a trapezoidal groove, and the upper end of the lower baffle plate is provided with a trapezoidal boss.

As a further description of the above technical solution:

the joint of the fixed nozzle sheet outer ring and the fixed nozzle sheet inner ring and the nozzle is an opening with a bevel edge.

As a further description of the above technical solution:

the trapezoidal groove is connected with the trapezoidal boss in a meshed mode, and sealant is arranged at the joint of the trapezoidal groove and the trapezoidal boss.

As a further description of the above technical solution:

the shaft couplings of the left side and the right side of the central shaft are uniformly provided with fixing bolts and are fixedly connected to the upper partition plate and the lower partition plate through the fixing bolts.

As a further description of the above technical solution:

the center above the central shaft is provided with a square boss and is connected with the upper clapboard.

As a further description of the above technical solution:

and a sealing ring is arranged between the coupler and the central shaft.

As a further description of the above technical solution:

the sealing strip and the sealing ring are made of rubber.

As a further description of the above technical solution:

and a sealing strip is arranged at the closed position of the cylinder.

The utility model discloses following beneficial effect has:

1. the utility model discloses in, at first, the inside ring connected in star that is provided with of cylinder, the baffle rim is fixed in ring connected in star just like this and be provided with the sealing strip in the middle of ring connected in star and the baffle rim, only need adopt transition fit to connect cylinder and baffle rim like this can, the equal fixedly connected with shaft coupling of the center pin left and right sides, the baffle split is last baffle and lower baffle, only need to adorn the baffle during installation on the square boss of center pin, through half-round key and fixing bolt with baffle and lower baffle equipment, the baffle has just been installed on the center pin like this, need not to install the baffle along center line on the center pin, and because there is the existence of square boss, the baffle can be more.

2. The utility model discloses in, be provided with the sealing strip in the middle of annular groove and the baffle rim, be provided with the sealing ring between shaft coupling and the central shaft, go up the baffle and be provided with the sealant with baffle meshing connection down in the middle of, this makes whole baffle sealing mechanism sealing performance better, and the sealing strip has certain ductility with the sealing ring, can play the effect that slows down the machine vibrations and cause the damage, is worth wideling popularize.

Drawings

Fig. 1 is a side view of a steam turbine diaphragm sealing device according to the present invention;

fig. 2 is a front view of a steam turbine diaphragm sealing device according to the present invention;

FIG. 3 is an enlarged view at B of FIG. 1;

fig. 4 is an enlarged view of fig. 1 at a.

Illustration of the drawings:

1. a cylinder; 2. a diaphragm rim; 3. fixing a nozzle plate outer ring; 4. a nozzle; 5. fixing the inner ring of the nozzle plate; 6. an upper partition plate; 7. a coupling; 8. a central shaft; 9. a circular groove; 10. a trapezoidal groove; 11. a trapezoidal boss; 12. a sealing strip; 13. fixing the bolt; 14. a semicircular key; 15. a seal ring; 16. a lower partition plate; 17. and (4) a square boss.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance, and furthermore, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-4, the present invention provides an embodiment: a steam turbine baffle plate sealing device comprises a cylinder 1, wherein a circular groove 9 is arranged inside the cylinder 1, a baffle plate wheel rim 2 is arranged inside the circular groove 9, a sealing strip 12 is arranged between the circular groove 9 and the baffle plate wheel rim 2, a fixed nozzle plate outer ring 3 is fixedly connected inside the baffle plate wheel rim 2, a nozzle 4 is fixedly connected inside the fixed nozzle plate outer ring 3, a fixed nozzle plate inner ring 5 is fixedly connected inside the nozzle 4, an upper baffle plate 6 and a lower baffle plate 16 are fixedly connected inside the fixed nozzle plate inner ring 5, fixing bolts 13 are respectively arranged on the upper baffle plate 6 and the lower baffle plate 16, the fixing bolts 13 on the upper baffle plate 6 and the fixing bolts 13 on the lower baffle plate 16 are fixedly connected through a semicircular key 14, a central shaft 8 is fixedly connected below the upper baffle plate 6, couplers 7 are respectively fixedly connected on the left side and the right side of the central shaft, lower baffle 16 upper end is provided with trapezoidal boss groove 11, makes to possess better leakproofness between cylinder 1 and the baffle rim 2 through above mechanism, and the installation is simpler and easier, goes up baffle 6 and is connected through the meshing also has better sealing effect between 16 with lower baffle.

The joints of the fixed nozzle sheet outer ring 3, the fixed nozzle sheet inner ring 5 and the nozzle 4 are bevel edge openings, steam can better act on the blades through the nozzle 4, the trapezoidal grooves 10 are meshed with the trapezoidal bosses 11 and the joints of the trapezoidal grooves 10 and the trapezoidal bosses 11 are provided with sealant, the sealing performance of the upper partition plate 6 and the lower partition plate 16 can be better, the shaft couplings 7 on the left side and the right side of the central shaft 8 are uniformly provided with fixing bolts 13, the shaft couplings 7 are fixedly connected with the upper partition plate 6 and the lower partition plate 16 through the fixing bolts 13, the center above the central shaft 8 is provided with a square boss 17 and connected with the upper partition plate 6, the middle of the shaft couplings 7 and the central shaft 8 is provided with a sealing ring 15, the sealing strip 12 and the sealing ring 15 are made of rubber materials, the shaft couplings 7 can enable the upper partition plate 6 and the lower partition plate 16 to be connected into a whole, and the abrasion of, the sealing ring 15 between the coupler 7 and the central shaft 8 can prevent the sealing strip 12 from being arranged at the closed position of the air cylinder 1 due to air leakage of the gap at the joint of the upper partition plate 6, the lower partition plate 16 and the central shaft 8, and prevent air leakage of the air cylinder 1.

The working principle is as follows: the upper baffle plate 6 is inserted into a square boss 17 on the central shaft 8, the upper baffle plate 6 is fixedly connected with a lower baffle plate 16 through a fixing bolt 13 and a half-round key 14, the coupler 7 is arranged on the central shaft 8 from two ends and is jointed with the upper baffle plate 6 and the lower baffle plate 16, the fixing bolt 13 is fastened to fixedly connect the coupler 7 with the upper baffle plate 6 and the lower baffle plate 16, then sealant is injected into the joint of the coupler 7 with the upper baffle plate 6 and the lower baffle plate 16 to increase the sealing performance, the periphery of the upper partition plate 6 and the periphery of the lower partition plate 16 are fixedly connected with a fixed nozzle sheet inner ring 5, then the periphery of the fixed nozzle sheet inner ring 5 is fixedly connected with a nozzle 4, then the periphery of the nozzle 4 is fixedly connected with a fixed nozzle sheet outer ring 3, then the periphery of the fixed nozzle sheet outer ring 3 is fixedly connected with a partition plate rim 2, then a layer of sealing strip 12 is tightly attached to the periphery of the partition plate rim 2, and finally the air cylinder 1 is closed.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.

Claims

1. A steam turbine diaphragm sealing device comprises a cylinder (1), and is characterized in that: the air cylinder is characterized in that a circular groove (9) is arranged inside the air cylinder (1), a partition plate wheel rim (2) is arranged inside the circular groove (9), a sealing strip (12) is arranged between the circular groove (9) and the partition plate wheel rim (2), a fixed nozzle sheet outer ring (3) is fixedly connected inside the partition plate wheel rim (2), a nozzle (4) is fixedly connected inside the fixed nozzle sheet outer ring (3), a fixed nozzle sheet inner ring (5) is fixedly connected inside the nozzle (4), an upper partition plate (6) and a lower partition plate (16) are fixedly connected inside the fixed nozzle sheet inner ring (5), fixing bolts (13) are arranged on the upper partition plate (6) and the lower partition plate (16), the fixing bolts (13) on the upper partition plate (6) are fixedly connected with the fixing bolts (13) on the lower partition plate (16) through semicircular keys (14), go up baffle (6) below fixedly connected with center pin (8), the equal fixedly connected with shaft coupling (7) of center pin (8) left and right sides, it is provided with trapezoidal recess (10) to go up baffle (6) lower extreme, baffle (16) upper end is provided with trapezoidal boss (11) down.

2. The steam turbine diaphragm seal assembly of claim 1 wherein: the joint of the fixed nozzle sheet outer ring (3) and the fixed nozzle sheet inner ring (5) and the nozzle (4) is a bevel edge opening.

3. The steam turbine diaphragm seal assembly of claim 1 wherein: the trapezoidal groove (10) is meshed with the trapezoidal boss (11) and a sealant is arranged at the joint of the trapezoidal groove (10) and the trapezoidal boss (11).

4. The steam turbine diaphragm seal assembly of claim 1 wherein: the shaft couplings (7) on the left side and the right side of the central shaft (8) are uniformly provided with fixing bolts (13) and the shaft couplings (7) are fixedly connected to the upper partition plate (6) and the lower partition plate (16) through the fixing bolts (13).

5. The steam turbine diaphragm seal assembly of claim 1 wherein: the center of the upper part of the central shaft (8) is provided with a square boss (17) and the central shaft (8) is connected with the upper clapboard (6).

6. The steam turbine diaphragm seal assembly of claim 1 wherein: and a sealing ring (15) is arranged between the coupler (7) and the central shaft (8).

7. The steam turbine diaphragm seal assembly of claim 1 wherein: the sealing strip (12) and the sealing ring (15) are both made of rubber.

8. The steam turbine diaphragm seal assembly of claim 1 wherein: and a sealing strip (12) is arranged at the closed position of the cylinder (1).