CN210889039U - Spiral-flow type broach vapor seal - Google Patents

Spiral-flow type broach vapor seal Download PDF

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Publication number
CN210889039U
CN210889039U CN201921773018.XU CN201921773018U CN210889039U CN 210889039 U CN210889039 U CN 210889039U CN 201921773018 U CN201921773018 U CN 201921773018U CN 210889039 U CN210889039 U CN 210889039U
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China
Prior art keywords
cavity
tooth
gland
vapor seal
seal
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CN201921773018.XU
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Chinese (zh)
Inventor
齐劲人
高雪松
赵杨
左磊
豆强
王玉伟
唐永
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SHANGHAI DANDI POWER TECHNOLOGY CO LTD
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SHANGHAI DANDI POWER TECHNOLOGY CO LTD
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Priority to CN201921773018.XU priority Critical patent/CN210889039U/en
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Abstract

The utility model discloses a spiral-flow type broach vapor seal, a serial communication port, including the low tooth of vapor seal, be equipped with the cavity between the low tooth of vapor seal and vapor seal, the cavity is by cavity one with cavity two and cavity three-section type throttle inflation space of connecting formation, is equipped with direction throttle tooth in the cavity, direction throttle tooth and cavity all are equipped with the anti-overflow that prevents the whirl offset and protect the tooth. The utility model discloses a not changing under the prerequisite that gland tooth quantity does not increase gland occupation space, the cavity that has increased the formation of gland tooth and intertooth improves the throttle inflation effect of gland greatly, carries out abundant consumption with the energy of vapour, improves steam turbine wholeness ability. The utility model is used for the steam turbine can not change gland tooth quantity and does not increase gland occupation space, realizes improving the airtight effect of gland, safe and reliable.

Description

Spiral-flow type broach vapor seal
Technical Field
The utility model relates to a spiral-flow type broach vapor seal mainly is applied to steam turbine vapor seal system, belongs to turbine mechanical seal technical field.
Background
In turbo machinery, the traditional comb-tooth steam seal is realized by stopping steam through steam seal teeth and fully consuming the energy of the steam as much as possible by utilizing a cavity formed between the steam seal teeth through throttling expansion, so that the steam sealing effect of the steam seal is realized. The more the tooth number of the steam seal tooth, the better the steam blocking effect, the larger the cavity formed between the steam seal tooth and the tooth, the better the throttling expansion effect, and the more sufficient the energy consumption of steam. However, because the space occupied by the steam seal is limited, the increase of the number of the steam seal teeth inevitably causes the reduction of the cavities between the teeth, thereby reducing the throttling expansion effect; the increase of the cavities between the teeth necessarily reduces the number of the steam seal teeth, thereby reducing the steam blocking effect of the steam seal teeth.
Disclosure of Invention
The utility model discloses the technical problem who solves: how to solve the contradiction between the number of the steam seal teeth and the size of the cavity between the teeth in the traditional comb-tooth steam seal.
In order to solve the technical problem, the technical scheme of the utility model a spiral-flow type broach vapor seal is provided, a serial communication port, including the low tooth of vapor seal, be equipped with the cavity between the low tooth of vapor seal and vapor seal, the cavity is by cavity one with cavity two and cavity three-phase section formula throttle inflation space of being connected formation, is equipped with direction throttle tooth in the cavity, direction throttle tooth and cavity all are equipped with the anti-overflow that prevents the whirl offset and protect the tooth.
Preferably, the chamber has a smooth streamline arc structure.
The utility model discloses a not changing under the prerequisite that gland tooth quantity does not increase gland occupation space, the cavity that has increased the formation of gland tooth and intertooth improves the throttle inflation effect of gland greatly, carries out abundant consumption with the energy of vapour, improves steam turbine wholeness ability. The utility model is used for the steam turbine can not change gland tooth quantity and does not increase gland occupation space, realizes improving the airtight effect of gland, safe and reliable.
Drawings
FIG. 1 is a schematic structural view of a spiral-flow type comb gland seal;
fig. 2 is a schematic structural view of a spiral-flow type comb steam seal three-section chamber.
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.
The utility model relates to a spiral-flow type broach vapor seal, as shown in figure 1. The spiral-flow type comb gland seal is provided with a cavity 2 between the gland seal low teeth 1 and the gland seal low teeth 1, the cavity 2 is internally provided with a guide throttling tooth 6, and the guide throttling tooth 6 and the cavity 2 are both provided with an anti-overflow guard tooth 7.
As shown in fig. 2, the newly added chamber three 5 and the original chamber one 3 and the original chamber two 4 form a three-stage throttling expansion space.
Steam enters the first chamber 3 through the steam seal low teeth 1 to finish the first section of throttling expansion to consume partial steam energy, then forms a rotational flow through the guide throttling teeth 6 to enter the second chamber 4 to finish the second section of throttling expansion to consume partial steam energy, the steam forming the rotational flow enters the third chamber 5 through the second chamber 4 with streamline design to finish the third section of throttling expansion to consume partial steam energy, and the overflow-proof guard teeth 7 are arranged to prevent the overflow of the steam when the steam enters different chambers. The energy of the steam is fully consumed through the three-section throttling expansion of the spiral-flow type comb steam seal, so that the steam sealing effect of the steam seal is improved.

Claims (2)

1. The utility model provides a spiral-flow type broach vapor seal, its characterized in that, hangs down tooth (1) including the vapor seal, hangs down tooth (1) and vapor seal and is equipped with cavity (2) between tooth (1) at the vapor seal, and cavity (2) are the syllogic throttle inflation space that is formed by cavity (3) and cavity two (4) and cavity three (5) connection, are equipped with direction throttle tooth (6) in cavity (2), and direction throttle tooth (6) and cavity (2) all are equipped with the anti-overflow that prevents the whirl offset and protect tooth (7).
2. A spiral-flow type comb gland seal according to claim 1, characterized in that the chamber (2) has a smooth streamline arc structure.
CN201921773018.XU 2019-10-21 2019-10-21 Spiral-flow type broach vapor seal Active CN210889039U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921773018.XU CN210889039U (en) 2019-10-21 2019-10-21 Spiral-flow type broach vapor seal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921773018.XU CN210889039U (en) 2019-10-21 2019-10-21 Spiral-flow type broach vapor seal

Publications (1)

Publication Number Publication Date
CN210889039U true CN210889039U (en) 2020-06-30

Family

ID=71336409

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921773018.XU Active CN210889039U (en) 2019-10-21 2019-10-21 Spiral-flow type broach vapor seal

Country Status (1)

Country Link
CN (1) CN210889039U (en)

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