CN204609955U - A kind of Multi-tooth corrugated sheet elastic sealing device - Google Patents

A kind of Multi-tooth corrugated sheet elastic sealing device Download PDF

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Publication number
CN204609955U
CN204609955U CN201520317084.1U CN201520317084U CN204609955U CN 204609955 U CN204609955 U CN 204609955U CN 201520317084 U CN201520317084 U CN 201520317084U CN 204609955 U CN204609955 U CN 204609955U
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CN
China
Prior art keywords
spring sheet
connecting plate
tooth
fixing frame
choked flow
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Expired - Fee Related
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CN201520317084.1U
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Chinese (zh)
Inventor
任徐元
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Xi'an Pu Ya Electric Power Science And Technology Development Co Ltd
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Xi'an Pu Ya Electric Power Science And Technology Development Co Ltd
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Priority to CN201520317084.1U priority Critical patent/CN204609955U/en
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Publication of CN204609955U publication Critical patent/CN204609955U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a kind of Multi-tooth corrugated sheet elastic sealing device, be made up of the arc elastic gland blocks of polylith end-to-end, arc elastic gland blocks comprises arc labyrinth casing, packing groove is had inside arc labyrinth casing, packing groove is equipped with flexible gland tooth, flexible gland tooth comprises spring sheet group and is set in its outer choked flow fixing frame, choked flow fixing frame is by header board, rear plate and connecting plate composition, connecting plate one end and header board outer end are connected, the connecting plate the other end and rear plate outer end are connected, rear plate height is greater than header board, the sectional shape of choked flow fixing frame is η font, spring sheet group comprises stiffening rib and spring sheet, be set in after spring sheet doubling on stiffening rib, the quantity of spring sheet is multi-disc, spring sheet the inner is ripple struction, stiffening rib is arranged in choked flow fixing frame, connecting plate is fixed in packing groove.The utility model is easy for installation, and ripple spring sheet is not yielding, lodge, get loose, and sealing resistance vapour is effective, and can guarantee that steam turbine normally works, user cost is low.

Description

A kind of Multi-tooth corrugated sheet elastic sealing device
Technical field
The utility model relates to a kind of turbomachinery seal arrangement, especially relates to a kind of for the Multi-tooth corrugated sheet elastic sealing device between steam turbine stator and rotor.
Background technique
Steam turbine has stators and rotators two large divisions, and operationally, stator maintains static, and rotor high-speed rotates, and certain gap guarantee steam turbine therefore must be kept between rotor and stator normally to work.And the existence in gap will cause gas leakage, this not only lowers unit efficiency, also can affect unit safety operation, in order to reduce steam leakage and prevent air from invading, between rotor and stator, need sealing.Although traditional steam turbine seal device serves certain sealing effect, but because seal clearance is excessive, gland sealing gear and rotating shaft are touched mill and cannot be recovered, cause the problems such as Steam loss increase and degree of vacuum reduction, bearing housing oil mixed with water, reduce the thermal efficiency of unit, shorten the working life of product, reduce stability and the Security of unit operation, the inefficiency of steam turbine.
Although have, application number is 200620078203.3, name is called that the Chinese patent of " Multi-tooth corrugated sheet elastic sealing device " discloses a kind of elastic sealing device, but there is following shortcoming in actual use in it: (1) ripple spring sheet is embedded on packing groove, distance between such ripple spring sheet and the both sides of packing groove is larger, during work, steam flow can produce larger impact to ripple spring sheet, ripple spring sheet can lodge, increase the gap between ripple spring sheet and rotor, the resistance vapour effect of influence elastane seal arrangement; And under the repeated stock effect of steam flow, ripple spring sheet can get loose from packing groove, once get loose, turbine blade can be caused impaired, and steam turbine cannot normally work, palpus maintenance down; (2) because ripple spring sheet is thinner, and flexible relative, yielding in clamping process, Long-Time Service easily loosens, and easily after loosening comes off from packing groove, and steam turbine cannot normally be worked; (3) ripple spring sheet needs to install one by one, installs inconvenient, installs and uses cost high.
Model utility content
The purpose of this utility model is to overcome above-mentioned deficiency of the prior art, a kind of Multi-tooth corrugated sheet elastic sealing device is provided, its structure is simple, modern design is reasonable and easy to install, ripple spring sheet is not yielding, lodge, get loose, sealing resistance vapour is effective, can guarantee that steam turbine normally works, and installs and uses cost low.
For achieving the above object, the technical solution adopted in the utility model is: a kind of Multi-tooth corrugated sheet elastic sealing device, it is characterized in that: be made up of the arc elastic gland blocks of polylith end-to-end, described arc elastic gland blocks comprises arc labyrinth casing, the inner side of described arc labyrinth casing has packing groove, described packing groove is provided with flexible gland tooth, described flexible gland tooth comprises spring sheet group and is set in the choked flow fixing frame outside described spring sheet group, described choked flow fixing frame is by header board, rear plate and connecting plate composition, one end of described connecting plate is fixedly connected with the outer end of header board, the other end of described connecting plate is fixedly connected with the outer end of rear plate, the height of described rear plate is greater than the height of header board, the sectional shape of described choked flow fixing frame is η font, described spring sheet group comprises stiffening rib and spring sheet, be set on stiffening rib after described spring sheet doubling, the quantity of described spring sheet is multi-disc, the inner of described spring sheet is ripple struction, described stiffening rib is arranged in described choked flow fixing frame, described connecting plate is fixed in described packing groove.
Above-mentioned a kind of Multi-tooth corrugated sheet elastic sealing device, is characterized in that: the outer end of described spring sheet is plane structure.
Above-mentioned a kind of Multi-tooth corrugated sheet elastic sealing device, is characterized in that: the Placement of described connecting plate and header board is for welding, and the Placement of described connecting plate and rear plate is for welding.
Above-mentioned a kind of Multi-tooth corrugated sheet elastic sealing device, is characterized in that: the quantity of described arc elastic gland blocks is six pieces, the equal and opposite in direction of six pieces of arc elastic gland blocks.
Above-mentioned a kind of Multi-tooth corrugated sheet elastic sealing device, is characterized in that: the quantity of described packing groove is two, leaves distance between two described packing grooves.
Above-mentioned a kind of Multi-tooth corrugated sheet elastic sealing device, is characterized in that: described spring sheet is nickel-base alloy sheet.
The utility model compared with prior art has the following advantages:
1, the utility model structure is simple, reasonable in design and use easy to operate.
2, the utility model is by setting up choked flow fixing frame, and the sectional shape of choked flow fixing frame is η font, choked flow fixing frame is set in outside spring sheet group, substantially reduces the distance between spring sheet and packing groove both sides, and choked flow fixing frame plays clamping and choked flow effect to spring sheet; Header board has air-flow certain extenuates effect, and rear plate provides the support of intensity to spring sheet, bears the impact of air-flow, prevents spring sheet from lodging under the effect of air-flow and getting loose, and improves resistance vapour effect, guarantees that steam turbine normally works.
3, the utility model is by setting up stiffening rib, and be set on stiffening rib after spring sheet doubling, stiffening rib is arranged in choked flow fixing frame, stiffening rib plays a part fixing and anti-loose to spring sheet, effectively can prevent spring sheet from easily occurring loosening, obscission after long-term use, ensure that steam turbine normally works.
4, be integral installation outside the utility model spring sheet group, solve existing ripple spring sheet and inconvenient problem is installed one by one, install and use cost low.
5, the utility model solve traditional steam turbine due to seal clearance excessive, gland sealing gear and rotor touch mill and cannot recover, cause Steam loss to increase and the problem such as degree of vacuum reduces, bearing housing oil mixed with water, significantly improve the thermal efficiency of unit, extend the working life of product, improve stability and the Security of unit operation, guarantee the working efficiency of steam turbine.
6, the utility model using scope is wide, not only effectively can be applicable to the sealing between steam turbine stator and rotor, also can be used for the sealing of bearing box of steam turbine flinger ring, shaft end gland seal, diaphragm gland, in the manufacturing being equally applicable to the large-scale turbomachineries such as metallurgy, petrochemical industry, chemical industry, aviation, shipbuilding industry gas turbine, compressor, motor and reducing energy consumption process.
Below by drawings and Examples, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of the utility model arc elastic gland blocks.
Fig. 3 is the A place enlarged view of Fig. 2.
Fig. 4 is using state figure of the present utility model.
Description of reference numerals:
1-arc elastic gland blocks; 2-spring sheet; 3-stiffening rib;
4-header board; 5-rear plate; 6-connecting plate;
7-flexible gland tooth; 8-arc labyrinth casing; 9-rotor.
Embodiment
As shown in Figure 1 to Figure 3, the utility model is made up of the arc elastic gland blocks 1 of polylith end-to-end, described arc elastic gland blocks comprises arc labyrinth casing 8, the inner side of described arc labyrinth casing 8 has packing groove, described packing groove is provided with flexible gland tooth 7, described flexible gland tooth 7 comprises spring sheet group and is set in the choked flow fixing frame outside described spring sheet group, described choked flow fixing frame is by header board 4, rear plate 5 and connecting plate 6 form, one end of described connecting plate 6 is fixedly connected with the outer end of header board 4, the other end of described connecting plate 6 is fixedly connected with the outer end of rear plate 5, the height of described rear plate 5 is greater than the height of header board 4, the sectional shape of described choked flow fixing frame is η font, described spring sheet group comprises stiffening rib 3 and spring sheet 2, be set in after the doubling of described spring sheet 2 on stiffening rib 3, the quantity of described spring sheet 2 is multi-disc, the inner of described spring sheet 2 is ripple struction, described stiffening rib 3 is arranged in described choked flow fixing frame, described connecting plate 6 is fixed in described packing groove.
As shown in Figure 3, the outer end of described spring sheet 2 is plane structure, can save spring sheet 2 materials, reduces user cost.
In the present embodiment, the Placement of described connecting plate 6 and header board 4 is for welding, and the Placement of described connecting plate 6 and rear plate 5 is for welding, and Placement is simple, connects reliable.
As shown in Figure 1, the quantity of described arc elastic gland blocks 1 is six pieces, the equal and opposite in direction of six pieces of arc elastic gland blocks 1; During actual fabrication, according to requirements, the arc elastic gland blocks of fair amount is set.
As shown in Figure 2, the quantity of described packing groove is two, leaves distance between two described packing grooves; During actual fabrication, according to requirements, the packing groove of fair amount is set.
In the present embodiment, described spring sheet 2 is nickel-base alloy sheet, and under high temperature, intensity is high, corrosion resistance and good.
Composition graphs 4, during use, at the outside hammering arc labyrinth casing 8 of packing groove, makes flexible gland tooth 7 be fixed on arc labyrinth casing 8, is then arranged on by the utility model on rotor 9, and spring sheet 2 is 0.10mm ~ 0.50mm with the assemblage gap of rotor 9.Utilize more pieces of resilient sheet 2 to reduce steam flow pressure gradually, reach minimizing steam leakage, reach the object of resistance steam packing.In the utility model, by setting up choked flow fixing frame, and the sectional shape of choked flow fixing frame is η font, and choked flow fixing frame is set in outside spring sheet group, substantially reduce the distance between spring sheet 2 and packing groove both sides, and choked flow fixing frame plays clamping and choked flow effect to spring sheet 2; Header board 4 pairs of air-flows have certain extenuates effect, and rear plate 5 pairs of spring sheets 2 provide the support of intensity, bear the impact of air-flow, prevent spring sheet 2 from lodging under the effect of air-flow and getting loose, and improve resistance vapour effect, guarantee that steam turbine normally works.By setting up stiffening rib 3, and be set on stiffening rib 3 after spring sheet 2 doubling, stiffening rib 3 is arranged in choked flow fixing frame, stiffening rib 3 pairs of spring sheets 2 play a part fixing and anti-loose, effectively can prevent spring sheet 2 from easily occurring loosening, obscission after long-term use, guarantee that steam turbine normally works.In addition, owing to being integral installation outside spring sheet group, solving existing ripple spring sheet and inconvenient problem is installed one by one, install and use cost low.
The above; it is only preferred embodiment of the present utility model; not the utility model is imposed any restrictions; every above embodiment is done according to the utility model technical spirit any simple modification, change and equivalent structure transformation, all still belong in the protection domain of technical solutions of the utility model.

Claims (6)

1. a Multi-tooth corrugated sheet elastic sealing device, it is characterized in that: be made up of the arc elastic gland blocks (1) of polylith end-to-end, described arc elastic gland blocks comprises arc labyrinth casing (8), the inner side of described arc labyrinth casing (8) has packing groove, described packing groove is provided with flexible gland tooth (7), described flexible gland tooth (7) comprises spring sheet group and is set in the choked flow fixing frame outside described spring sheet group, described choked flow fixing frame is by header board (4), rear plate (5) and connecting plate (6) composition, one end of described connecting plate (6) is fixedly connected with the outer end of header board (4), the other end of described connecting plate (6) is fixedly connected with the outer end of rear plate (5), the height of described rear plate (5) is greater than the height of header board (4), the sectional shape of described choked flow fixing frame is η font, described spring sheet group comprises stiffening rib (3) and spring sheet (2), be set on stiffening rib (3) after described spring sheet (2) doubling, the quantity of described spring sheet (2) is multi-disc, the inner of described spring sheet (2) is ripple struction, described stiffening rib (3) is arranged in described choked flow fixing frame, described connecting plate (6) is fixed in described packing groove.
2. according to a kind of Multi-tooth corrugated sheet elastic sealing device according to claim 1, it is characterized in that: the outer end of described spring sheet (2) is plane structure.
3. according to a kind of Multi-tooth corrugated sheet elastic sealing device described in claim 1 or 2, it is characterized in that: the Placement of described connecting plate (6) and header board (4) is for welding, and the Placement of described connecting plate (6) and rear plate (5) is for welding.
4. according to a kind of Multi-tooth corrugated sheet elastic sealing device described in claim 1 or 2, it is characterized in that: the quantity of described arc elastic gland blocks (1) is six pieces, the equal and opposite in direction of six pieces of arc elastic gland blocks (1).
5. according to a kind of Multi-tooth corrugated sheet elastic sealing device described in claim 1 or 2, it is characterized in that: the quantity of described packing groove is two, between two described packing grooves, leave distance.
6. according to a kind of Multi-tooth corrugated sheet elastic sealing device described in claim 1 or 2, it is characterized in that: described spring sheet (2) is nickel-base alloy sheet.
CN201520317084.1U 2015-05-16 2015-05-16 A kind of Multi-tooth corrugated sheet elastic sealing device Expired - Fee Related CN204609955U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520317084.1U CN204609955U (en) 2015-05-16 2015-05-16 A kind of Multi-tooth corrugated sheet elastic sealing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201520317084.1U CN204609955U (en) 2015-05-16 2015-05-16 A kind of Multi-tooth corrugated sheet elastic sealing device

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CN204609955U true CN204609955U (en) 2015-09-02

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017092158A1 (en) * 2015-12-01 2017-06-08 秦皇岛鱼麟电力设备有限公司 Elastic sheet used in servo suspended steam seal band of turbine and steam seal structure thereof
CN112282597A (en) * 2020-09-17 2021-01-29 天津星月欧瑞门业有限公司 Stamping and integrally-formed production process of anti-theft door

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017092158A1 (en) * 2015-12-01 2017-06-08 秦皇岛鱼麟电力设备有限公司 Elastic sheet used in servo suspended steam seal band of turbine and steam seal structure thereof
US10385711B2 (en) 2015-12-01 2019-08-20 Qinhuangdao Yulin Electric Power Equipment Co., Ltd. Elastic sheet used for turbine follow-up suspended steam seal belt and steam seal structure thereof
CN112282597A (en) * 2020-09-17 2021-01-29 天津星月欧瑞门业有限公司 Stamping and integrally-formed production process of anti-theft door

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C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20150902

Termination date: 20160516

CF01 Termination of patent right due to non-payment of annual fee