CN208280993U - A kind of axial seal structure - Google Patents

Abstract

The utility model relates to a kind of axial seal structures comprising shell, axial sealer setting inner casing inside the shell, the sealing plate of inner casing lateral wall is arranged in and is arranged between inner casing and shell, axial sealer and sealing plate, which are formed, to be sealed；Original radial clearance adjustment device is changed to axial interval regulator, sealing difficulty is effectively reduced, reduces the factor for influencing gap size, it is only necessary to consider the influence expanded with heat and contract with cold to gap, greatly reduce must there are safety clearance.

Description

A kind of axial seal structure

Technical field

The utility model relates to a kind of axial seal structures.

Background technique

According to the working characteristics and design requirement of turbine, tip clearance depend mainly on the size of grommet, wheel disc and The radial displacement of blade.And radial displacement is mainly by temperature, revolving speed, centrifugal force, pressure difference, caused by the factors variation such as vibration. Therefore it needs to retain biggish safety clearance to prevent frictional impact, causes the accident.And for technique when assembled require compared with It is high.

Presently, there are turbine seal device and gap control device, all be sealing and control radial clearance, so just It may require that reserved bigger safety clearance.

Utility model content

Axial seal structure is used the technical problem to be solved by the utility model is to provide a kind of, effectively air-flow is stopped to be let out Dew, the lesser axial seal structure of sealing difficulty.

The technical scheme adopted by the utility model is a kind of axial seal structure comprising shell, setting are inside the shell Inner casing, the sealing plate of inner casing lateral wall is set and is arranged between inner casing and shell axial sealer, it is axial close Seal apparatus and sealing plate, which are formed, to be sealed.

The seal washer that axial sealer described in the utility model includes controller housing, is arranged in controller housing And position regulator, mounting groove is provided on the controller housing, the seal washer is erected on mounting groove simultaneously And formed and sealed with sealing plate, gap and wear sensor are provided in seal washer.

Position regulator described in the utility model is using hydraulic structure and is symmetricly set on seal washer two sides, described Position regulator includes the stator being fixedly mounted in controller housing, the mover piston being mounted in stator and and stator The outboard end of the hydraulic pipeline of connection, the mover piston is in contact with the side wall of seal washer, sets on the seal washer It is equipped with the slot for forming sealing with sealing plate.

Position regulator described in the utility model include be symmetricly set on inside controller housing the motor at both ends and The driving gear connecting with motor drive, the seal washer include the left washer and right pad being located at left and right sides of sealing plate Circle, the left washer and right washer are in close contact with sealing plate, the top outer end of the left washer and right washer have with The engaging tooth that the driving gear is meshed.

Using labyrinth structure sealing or Honeycomb steam seal or brush vapour between seal washer and sealing plate described in the utility model Seal structure.

The utility model is provided with mounting groove in the seal washer, and the gap and wear sensor are located at mounting groove It is interior.

Axial sealer described in the utility model includes the seal washer being arranged inside the shell and is arranged in gasket Damping system between circle and shell, the seal washer and sealing plate, which are formed, to be sealed.

Damping system described in the utility model is elastic rubber or metal spring.

The good effect of the utility model are as follows: original radial clearance adjustment device is changed to axial interval regulator, Sealing difficulty is effectively reduced, the factor for influencing gap size is reduced, it is only necessary to consider the influence expanded with heat and contract with cold to gap, significantly Reduce must there are safety clearance.When temperature, revolving speed, centrifugal force, pressure difference, the factors variation such as vibration causes the radial direction of inner casing When displacement, band is unaffected, still can keep lesser gap.The sealing structure of the utility model can be used for controlling Turbine tip gap can also be applied to other positions of turbine, such as shaft end seal, bulkhead seal etc. or other rotations The position seals position that mechanical needs seal.

Detailed description of the invention

Fig. 1 is 1 structural schematic diagram of the utility model embodiment；

Fig. 2 is 2 structural schematic diagram of the utility model embodiment；

Fig. 3 is 3 structural schematic diagram of the utility model embodiment；

Fig. 4 is 4 structural schematic diagram of the utility model embodiment.

Specific embodiment

Embodiment 1: as shown in Fig. 1, the utility model is including shell 2, the inner casing being arranged in shell 21, setting The sealing plate 9 of 1 lateral wall of shell and the axial sealer being arranged between inner casing 1 and shell 2, axial sealer and sealing Plate 9 forms sealing.Sealing plate 9 is vertically set on the lateral wall of inner casing 1, T-shaped with the axial cross section of sealing plate 9.Sealing plate 9 is deep Enter into axial sealer to be formed with axial sealer and seal.

The axial sealer includes controller housing 3, the seal washer being arranged in controller housing 34 and position Adjustment device is set, is provided with mounting groove on the controller housing 3, opens up multiple labyrinth structures in the inside of seal washer 4, Cooperation sealing plate 9 is sealed, and reduces gas leakage, labyrinth structure can also be replaced with to the structures such as Honeycomb steam seal or brush steam seal.

There is mounting groove 10 in the part that seal washer 4 is contacted with sealing plate 9, is provided with gap and abrasion in mounting groove 10 Sensor 7.

The position regulator is using hydraulic structure and is symmetricly set on 4 two sides of seal washer, the position adjustment Device includes the stator 5 being fixedly mounted in controller housing 3, the mover piston 8 being mounted in stator 5 and connects with stator 5 The outboard end of logical hydraulic pipeline 6, the mover piston 8 is in contact with the side wall of seal washer 5.Position regulator annular cloth It sets in controller housing 3, convenient for uniformly controlling the movement of sealing structure, while 7 arrangement of gap and wear sensor It is identical as position regulator.

The internal height of seal washer 4 determines by the height and Oscillation Amplitude of sealing plate 9, can retain between bigger safety Gap and sealing effect is not influenced.

It adopts the structure, when a degree of radial displacement occurs for inner casing 1 and sealing plate 9, sealing is not influenced. When causing axial gap to become larger due to abrasion, the axial position of seal washer 4 is adjusted by position regulator, to sealing plate 9 re-start sealing, reduce air loss.

Embodiment 2: as shown in Fig. 2, in the case where guaranteeing that other structures are constant, cancel hydraulic structure, and remove control Device shell 3 processed carries out packing using common sealing gland, and damping system 18 is arranged in the left and right ends of seal washer 4, reduces Number of parts reduces costs, and damping system 18 can select elastic rubber or metal spring etc. according to different working conditions Material.

Embodiment 3: as shown in Fig. 3, on the basis of embodiment 1, the structure of position regulator, the position are changed Adjustment device includes the sliding tooth for being symmetricly set on the motor 12 at 3 inside both ends of controller housing and being sequentially connected with motor 12 Wheel 13, the seal washer 4 include the left washer 401 and right washer 402 for being located at 9 left and right sides of sealing plate, the left pad Circle 401 and right washer 402 are in close contact with sealing plate 9, are had at the top outer end of the left washer 401 and right washer 402 The engaging tooth 14 being meshed with the driving gear 13.

Controller housing 3 is two at this time, and respectively at the both ends of shell 2, each controller housing 3 is divided to for upper and lower two cabins Body, upper cabin are motor room, and lower cabin is the mobile cabin of seal washer, and motor 12 is located in upper-deck cabin body, in the output shaft of motor 12 On be provided with first gear 15, there are also the second gear 16 that is meshed with first gear 15 in upper-deck cabin body, second gear 16 is passed It is dynamic to be connected with worm screw 17, there is the driving gear 13 being meshed with worm screw 17 in lower cabin.

The inner end of left washer 401 and right washer 402 is that the side contacted with sealing plate 9 is labyrinth structure, can also be incited somebody to action Labyrinth structure replaces with the structures such as Honeycomb steam seal or brush steam seal.The top of outboard end is engaging tooth 14 made of rubber, is used for When instantaneous displacement occurs for left and right washer, rubber engaging tooth can protect gear train assembly.

When axial displacement occurs for inner casing 1 and sealing plate 9, left and right washer is driven to be moved accordingly by gear drive It is dynamic, realize the sealing with sealing plate 9.

Embodiment 4: as shown in Fig. 4, on the basis of embodiment 3, position regulator is removed, while removing and controlling Device shell 3, shell 2 is interior to be arranged seal 19, increases damping unit between the outboard end and seal 19 of right-left seal plate, hinders Buddhist nun's device can be elastic rubber or metal spring.After being reduced to packing, reduce number of parts, reduces costs.

When in use, gap and wear sensor 7 and PLC are patrolled for the mechanism of the embodiments of the present invention 1 and embodiment 3 Collect controller connection, while PLC logic controller control motor 12 or hydraulic structure.Tool-wear monitoring device and gap measuring apparatus Measurement in a closed series go out at a distance from target object, and release signal gives PLC logic controller, and PLC logic controller is according to signal Judgement, and control motor 12 or hydraulic structure are sent a signal to, motor 12 or hydraulic structure are controlled according to signal to sealing structure Mobile adjustment is carried out, and feeds back the distance of movable sensor to PLC logic controller.Control device again carries out pair signal Than, and preservation is recorded, therefore constitute closed clearance control system.

The it is proposed of the utility model creativeness is adjusted turbine tip gap using axial seal mode, effectively subtracts Small sealing difficulty reduces the factor for influencing gap size, it is only necessary to consider the influence expanded with heat and contract with cold to gap, greatly reduce Must there are safety clearance.

Claims (8)

1. a kind of axial seal structure, it is characterised in that it includes shell (2), the inner casing (1) being arranged in shell (2), setting Inner casing (1) lateral wall sealing plate (9) and axial sealer between inner casing (1) and shell (2) is set, axial direction is close Seal apparatus and sealing plate (9), which are formed, to be sealed.

2. a kind of axial seal structure according to claim 1, it is characterised in that the axial sealer includes control Device shell (3), the seal washer (4) and position regulator being arranged in controller housing (3), in the controller housing (3) mounting groove is provided on, the seal washer (4) is erected on mounting groove and is formed with sealing plate (9) and sealed, sealed Gap and wear sensor (7) are provided in washer (4).

3. a kind of axial seal structure according to claim 2, it is characterised in that the position regulator is using hydraulic Structure and seal washer (4) two sides are symmetricly set on, the position regulator includes being fixedly mounted on controller housing (3) Interior stator (5), the mover piston (8) being mounted in stator (5) and the hydraulic pipeline (6) being connected to stator (5), it is described dynamic The outboard end of sub- piston (8) is in contact with the side wall of seal washer (4), be provided on the seal washer (4) for it is close Sealing plate (9) forms the slot of sealing.

4. a kind of axial seal structure according to claim 2, it is characterised in that the position regulator includes symmetrical Driving gear (13) in the motor (12) at the internal both ends of controller housing (3) and with motor (12) transmission connection, institute are set Stating seal washer (4) includes the left washer (401) and right washer (402) being located at left and right sides of sealing plate (9), the left pad It encloses (401) and right washer (402) to be in close contact with sealing plate (9), on the top of the left washer (401) and right washer (402) Portion's outboard end has the engaging tooth (14) being meshed with driving gear (13).

5. a kind of axial seal structure according to claim 2, it is characterised in that the seal washer (4) and sealing plate (9) using labyrinth structure sealing or Honeycomb steam seal or brush steam seal structure between.

6. a kind of axial seal structure according to claim 2, it is characterised in that be provided in the seal washer (4) Mounting groove (10), the gap and wear sensor (7) are located in mounting groove (10).

7. a kind of axial seal structure according to claim 1, it is characterised in that the axial sealer includes setting In the seal washer (4) in shell (2) and the damping system being arranged between seal washer (4) and shell (2), the sealing Washer (4) and sealing plate (9), which are formed, to be sealed.

8. a kind of axial seal structure according to claim 7, it is characterised in that the damping system be elastic rubber or Metal spring.