CN112576757B - Metal sealing structure for non-contact end face sealing - Google Patents

Metal sealing structure for non-contact end face sealing Download PDF

Info

Publication number
CN112576757B
CN112576757B CN202011459796.9A CN202011459796A CN112576757B CN 112576757 B CN112576757 B CN 112576757B CN 202011459796 A CN202011459796 A CN 202011459796A CN 112576757 B CN112576757 B CN 112576757B
Authority
CN
China
Prior art keywords
sealing
ring
metal
face
seat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011459796.9A
Other languages
Chinese (zh)
Other versions
CN112576757A (en
Inventor
马莹
李智军
闫方琦
常涛
郝飞
牛晋波
宋勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xian Aerospace Propulsion Institute
Original Assignee
Xian Aerospace Propulsion Institute
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xian Aerospace Propulsion Institute filed Critical Xian Aerospace Propulsion Institute
Priority to CN202011459796.9A priority Critical patent/CN112576757B/en
Publication of CN112576757A publication Critical patent/CN112576757A/en
Application granted granted Critical
Publication of CN112576757B publication Critical patent/CN112576757B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
    • F16J15/3236—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips with at least one lip for each surface, e.g. U-cup packings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/122—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings especially adapted for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3436—Pressing means
    • F16J15/3452—Pressing means the pressing force resulting from the action of a spring

Abstract

The invention discloses a metal sealing structure for non-contact end face sealing, which comprises a rotating shaft, a sealing shell, a moving ring, a static ring seat and a metal sealing element, wherein the metal sealing element is integrally in a closed ring shape and comprises an inner sealing arm ring and an outer sealing arm ring; a V-shaped open slot is formed between the inner sealing arm ring and the outer sealing arm ring, the inner side surface of the inner sealing arm ring is a raised arc surface and is marked as an inner sealing lip, the inner sealing lip is matched with the stationary ring seat, the outer side surface of the outer sealing arm ring is a raised arc surface and is marked as an outer sealing lip, and the outer sealing lip is matched with the sealing shell; the inner sealing arm ring and the outer sealing arm ring are intersected and extend out of the supporting arm ring, the end face of the supporting arm ring is used as a positioning face, and the positioning face is in close contact with the annular groove. The V-shaped open slot enables the inner sealing lip and the static ring seat and the outer sealing lip and the sealing shell to be always in close contact, maintains the sealing property, has strong resilience and has small influence on the disengagement performance of the static ring and the dynamic ring during working.

Description

Metal sealing structure for non-contact end face sealing
Technical Field
The invention relates to the technical field of metal sealing, in particular to a metal sealing structure for non-contact end face sealing.
Background
Non-contact end face seal belongs to mechanical seal, is commonly used for shaft end seal of rotary fluid machinery such as pumps, compressors and the like, and relies on a rotary moving ring and a static ring to be arranged in the radial direction of a shaft to form sealing capacity so as to prevent fluid from leaking.
The traditional sealing form adopts an O-shaped rubber ring or other rubber and plastic materials, has low price and reliable performance, but in the fields of aerospace engine pumps, nuclear power main pumps, ship engine pumps and the like, the sealing needs to operate at extreme temperature. Most of non-metallic materials can be melted at high temperature and cannot adapt to high-temperature working conditions, and rubber materials lose elasticity in a low-temperature cryogenic environment and become glass state, so that the sealing performance cannot be maintained; the plastic material has high low-temperature shrinkage, is hard in a cryogenic environment, and is difficult to overcome cold flow and stress relaxation, so that the sealing performance is reduced, and leakage is generated. Therefore, the traditional rubber-plastic materials can not guarantee the sealing performance at extreme temperature any more, and therefore metal sealing is adopted for replacement.
For metal sealing, an O-shaped metal sealing ring is mostly used as a main sealing form, but the sealing specific pressure of the O-shaped metal sealing is weak, the resilience is low, the reliability of the metal sealing is low, and the service life is greatly limited.
Disclosure of Invention
The invention provides a metal sealing structure for non-contact end face sealing, which aims to solve the problems of low metal sealing reliability caused by weak sealing specific pressure and low resilience in the prior art.
The technical solution of the invention is as follows: a metal sealing structure for non-contact end face sealing comprises a rotating shaft, a sealing shell, a moving ring, a static ring seat and a metal sealing element, wherein the moving ring is installed on the rotating shaft, the moving ring is matched with the static ring, the static ring is matched with the static ring seat, the static ring seat is connected with the sealing shell through a spring, a seat ring is arranged on the static ring seat in the axial direction far away from the static ring, an annular groove corresponding to the seat ring is formed in the sealing shell, and the seat ring and the annular groove are sealed through the metal sealing element;
the metal sealing element is integrally in a closed ring shape and comprises an inner sealing arm ring and an outer sealing arm ring;
a V-shaped open slot is formed between the inner sealing arm ring and the outer sealing arm ring, the inner side surface of the inner sealing arm ring is a raised arc-shaped surface and is marked as an inner sealing lip, the inner sealing lip is matched with the static ring seat, the outer side surface of the outer sealing arm ring is a raised arc-shaped surface and is marked as an outer sealing lip, and the outer sealing lip is matched with the sealing shell;
the inner sealing arm ring and the outer sealing arm ring are intersected and extend out of the supporting arm ring, the end face of the supporting arm ring is used as a positioning face, and the positioning face is in close contact with the annular groove.
Further, the side, close to the inner seal arm ring, of the open groove is an axial straight-edge wall.
Furthermore, the outer side wall of the annular groove is radially provided with a circle of groove, a clamping ring is embedded into the groove, the part, protruding out of the groove, of the clamping ring is connected with the open groove through a positioning ring and used for limiting the metal sealing element, and the positioning ring and the clamping ring play a role in preventing the metal sealing element from displacing and affecting the sealing effect.
Furthermore, the inner side surface of the positioning ring is a straight side wall and is matched with the straight side wall of the inner sealing arm ring.
Further, the opening included angle alpha of the opening groove is 30-60 degrees.
Furthermore, the annular surface of the outer sealing lip matched with the sealing shell is an outer sealing area, the annular surface of the inner sealing lip matched with the seat ring of the static ring seat is an inner sealing area, and the area of the inner sealing area is smaller than that of the outer sealing area.
Furthermore, the surface roughness of the inner sealing lip and the surface roughness of the outer sealing lip are both less than or equal to Ra1.6 mu m.
Further, the surfaces of the inner sealing lip and the outer sealing lip are subjected to copper plating and silver plating treatment, the copper plating layer is positioned on the bottom layer, the thickness of the copper plating layer is 10-15 micrometers, and the thickness of the silver plating layer is 120-150 micrometers.
Further, the radial dimension D1 of the inner sealing arm ring is 1/3-1/4 of the radial dimension D1 of the outer sealing arm ring.
Further, the cross-section of the metal seal 1 has the following dimensions: the axial dimension H of the metal sealing element is 5-15 mm, the radial dimension D1 of the inner sealing arm ring is 0.5-1 mm, the radial dimension D2 of the outer sealing arm ring is 1.5-2.5 mm, the dimension D3 of the positioning surface is 1.0-3.5 mm, the arc radius R1 of the bulge of the inner sealing lip is 1.5-4 mm, and the arc radius R2 of the bulge of the outer sealing lip is 6-10 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) According to the metal sealing element, the V-shaped open slot is formed between the inner sealing arm ring and the outer sealing arm ring, so that the inner sealing lip and the static ring seat and the outer sealing lip and the sealing shell can be always in close contact, the sealing property is maintained, and the resilience is strong.
(2) The contact area between the inner sealing lip of the metal sealing element and the static ring seat is small, and the surface roughness of the inner sealing lip is small, so that the friction force between the inner sealing lip and the static ring seat is small, and the influence on the disengagement performance of the static ring and the moving ring during working is small.
(3) The size of the metal sealing element can be adaptively adjusted and designed according to the medium pressure, the structure of the static ring seat and the sealing shell, the applicable temperature range is wide (253-870 ℃), and the types of applicable media are various: comprises liquid hydrogen, liquid oxygen, methane, oxygen-enriched fuel gas, dinitrogen tetroxide, hydrazine media, water, nitrogen, air, kerosene, fuel oil and the like.
Drawings
FIG. 1 is an assembly diagram of a first embodiment of the present invention;
FIG. 2 is a schematic view of the assembly of a metal seal with a stationary ring seat and a seal housing according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a metal seal according to an embodiment of the present invention;
FIG. 4 is a cross-sectional, dimensional illustration of a metal seal according to an embodiment of the present invention;
FIG. 5 is a schematic view of the assembly of the second metal sealing element with the stationary ring seat and the sealing housing according to the embodiment of the present invention;
FIG. 6 is a cross-sectional view of another dimension of the metal seal of the present invention illustrating the first dimension;
fig. 7 is another dimension structure view of the cross section of the metal seal member of the present invention (ii).
Detailed Description
The following detailed description of the present invention is provided in conjunction with the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the specific embodiments.
Example one
As shown in fig. 1-4, 6, and 7, the metal sealing structure for non-contact end face sealing includes a rotating shaft 100, a sealing housing 200, a moving ring 300, a stationary ring 400, a stationary ring seat 500, and a metal sealing element 1, where the moving ring 300 is installed on the rotating shaft 100, the moving ring 300 is matched with the stationary ring 400, the stationary ring 400 is matched with the stationary ring seat 500, the stationary ring seat 500 is connected with the sealing housing 200 through a spring, the stationary ring seat 500 is provided with a seat ring 501 in an axial direction away from the stationary ring 400, the sealing housing 200 is provided with an annular groove 201 corresponding to the seat ring 501, and the seat ring 501 and the annular groove 201 are sealed through the metal sealing element 1;
the metal sealing element 1 is in a closed circular ring shape as a whole, and the metal sealing element 1 comprises an inner sealing arm ring 11 and an outer sealing arm ring 12; a V-shaped opening groove 14 is formed between the inner seal arm ring 11 and the outer seal arm ring 12, the opening included angle alpha of the opening groove 14 is 30-60 degrees, the inner side surface of the inner seal arm ring 11 is a raised arc surface and is marked as an inner seal lip 110, the inner seal lip 110 is matched with the stationary ring seat 500, the outer side surface of the outer seal arm ring 12 is a raised arc surface and is marked as an outer seal lip 120, the outer seal lip 120 is matched with the seal shell 200, the annular surface of the outer seal lip 120 matched with the seal shell 200 is an outer seal area, the annular surface of the inner seal lip 110 matched with the seat ring 501 of the stationary ring seat 500 is an inner seal area, and the area of the inner seal area is smaller than that of the outer seal area; the inner sealing arm ring 11 and the outer sealing arm ring 12 are intersected and extend out of the supporting arm ring 13, the end face of the supporting arm ring 13 is used as a positioning face 131, and the positioning face 131 is in close contact with the annular groove 201.
Wherein, the surface roughness of the inner sealing lip 110 and the outer sealing lip 120 is less than or equal to Ra1.6 μm, the surfaces of the inner sealing lip 110 and the outer sealing lip 120 are plated with copper and silver, the copper plated layer is positioned at the bottom layer, the thickness of the copper plated layer is 10-15 μm, and the thickness of the silver plated layer is 120-150 μm.
Wherein, the cross-section of the metal sealing member 1 has the following dimensions: the axial dimension H of the metal sealing element 1 is 5-15 mm, the radial dimension D1 of the inner sealing arm ring 11 is 0.5-1 mm, the radial dimension D2 of the outer sealing arm ring 12 is 1.5-2.5 mm, the radial dimension D1 of the inner sealing arm ring 11 is 1/3-1/4 of the radial dimension D1 of the outer sealing arm ring 12, the dimension D3 of the positioning surface 131 is 1.0-3.5 mm, the convex arc radius R1 of the inner sealing lip 110 is 1.5-4 mm, and the convex arc radius R2 of the outer sealing lip 120 is 6-10 mm.
The metal sealing element is made of a material selected according to the working medium temperature which is not more than 870 ℃, and the grade of the material is GH4141; the medium temperature is less than or equal to 730 ℃, and the material grade is selected to be GH4738; the medium temperature is less than or equal to 630 ℃, and the material grade is selected to be GH4169; the medium temperature is less than or equal to 450 ℃, and the material grade is GH4145; the medium temperature is less than or equal to 0 ℃, and the material grade is selected to be 07Cr16Ni6.
Example two
As shown in fig. 1 to 7, the metal sealing structure for non-contact end face sealing includes a rotating shaft 100, a sealing housing 200, a moving ring 300, a stationary ring 400, a stationary ring seat 500 and a metal sealing element 1, the moving ring 300 is mounted on the rotating shaft 100, the moving ring 300 is matched with the stationary ring 400, the stationary ring 400 is matched with the stationary ring seat 500, the stationary ring seat 500 is connected with the sealing housing 200 through a spring, a seat ring 501 is arranged on the stationary ring seat 500 in the axial direction away from the stationary ring 400, an annular groove 201 corresponding to the seat ring 501 is arranged on the sealing housing 200, and the seat ring 501 and the annular groove 201 are sealed through the metal sealing element 1;
the metal sealing element 1 is in a closed circular ring shape as a whole, and the metal sealing element 1 comprises an inner sealing arm ring 11 and an outer sealing arm ring 12; a V-shaped opening groove 14 is formed between the inner sealing arm ring 11 and the outer sealing arm ring 12, the opening included angle alpha of the opening groove 14 is 30-60 degrees, the inner side surface of the inner sealing arm ring 11 is a convex arc surface and is marked as an inner sealing lip 110, the inner sealing lip 110 is matched with the static ring seat 500, the outer side surface of the outer sealing arm ring 12 is a convex arc surface and is marked as an outer sealing lip 120, the outer sealing lip 120 is matched with the sealing shell 200, the annular surface where the outer sealing lip 120 is matched with the sealing shell 200 is an outer sealing area, the annular surface where the inner sealing lip 110 is matched with the seat ring 501 of the static ring seat 500 is an inner sealing area, and the area of the inner sealing area is smaller than that of the outer sealing area; the inner sealing arm ring 11 and the outer sealing arm ring 12 are intersected and extend out of the supporting arm ring 13, the end face of the supporting arm ring 13 is used as a positioning face 131, and the positioning face 131 is tightly contacted with the annular groove 201;
the side of the open groove 14 close to the inner seal arm ring 11 is an axial straight side wall, the outer side wall of the annular groove 201 is radially provided with a circle of groove, the groove is embedded with a snap ring 3, the part of the snap ring 3 protruding out of the groove is connected with the open groove 14 through a positioning ring 2 and used for limiting the metal sealing element 1, and the inner side surface of the positioning ring 2 is a straight side wall and matched with the straight side wall of the inner seal arm ring 11.
Wherein, the surface roughness of the inner sealing lip 110 and the outer sealing lip 120 is less than or equal to Ra1.6 μm.
Wherein, the surfaces of the inner sealing lip 110 and the outer sealing lip 120 are plated with copper and silver, the copper plating layer is positioned at the bottom layer, the thickness of the copper plating layer is 10-15 μm, and the thickness of the silver plating layer is 120-150 μm.
Wherein, the cross-section of the metal sealing member 1 has the following dimensions: the axial dimension H of the metal sealing element 1 is 5-15 mm, the radial dimension D1 of the inner sealing arm ring 11 is 0.5-1 mm, the radial dimension D2 of the outer sealing arm ring 12 is 1.5-2.5 mm, the radial dimension D1 of the inner sealing arm ring 11 is 1/3-1/4 of the radial dimension D1 of the outer sealing arm ring 12, the dimension D3 of the positioning surface 131 is 1.0-3.5 mm, the convex arc radius R1 of the inner sealing lip 110 is 1.5-4 mm, and the convex arc radius R2 of the outer sealing lip 120 is 6-10 mm.
The metal sealing element is made of a material selected according to the working medium temperature which is not more than 870 ℃, and the grade of the material is GH4141; the medium temperature is less than or equal to 730 ℃, and the material grade is GH4738; the medium temperature is less than or equal to 630 ℃, and the material grade is selected to be GH4169; the medium temperature is less than or equal to 450 ℃, and the material grade is GH4145; the medium temperature is less than or equal to 0 ℃, and the material grade is selected to be 07Cr16Ni6.
The working process is as follows: the invention is commonly used for shaft end sealing of rotary fluid machinery such as a pump, a compressor and the like, when a moving ring 300 and a static ring 400 are relatively static, the moving ring 300 and the static ring 400 are tightly attached, a gap between a static ring seat 500 and a sealing shell 200 is sealed through a metal sealing element 1, a V-shaped open slot is formed between an inner sealing arm ring 11 and an outer sealing arm ring 12, so that the metal sealing element 1 has high resilience performance and ensures sealing, an inner sealing lip 110 is tightly attached to a seat ring 501 on the static ring seat 500, an outer sealing lip 120 is tightly attached to the wall of a groove 201 on the sealing shell 200, and a positioning surface 131 is tightly attached to the bottom wall of the groove 201, so that medium leakage between the static ring seat 500 and the sealing shell 200 is prevented through the contact pressure between the inner sealing lip 110 and the seat ring 501 and the contact pressure between the outer sealing lip 120 and the wall of the groove 201; when the rotating ring 300 rotates along with the rotating shaft 100 in the working process, the rotating ring 300 and the static ring 400 slide relatively, media flow through, the media apply certain pressure to the static ring 400 and the static ring seat 500, the static ring seat 500 axially floats, friction between the static ring seat 500 and the inner sealing lip 110 has certain influence on the static ring seat 500, so that the separation performance of the static ring 400 and the rotating ring 300 is further influenced, the inner sealing lip 110 and the static ring seat 500 of the metal sealing element 1 are sealed, the friction between the sealing lip 110 and the static ring seat 500 is small, and the separation performance of the static ring 400 and the rotating ring 300 is small.
The above disclosure is only for the specific embodiment of the present invention, but the embodiment of the present invention is not limited thereto, and any variations that can be made by those skilled in the art should fall within the scope of the present invention.

Claims (9)

1. A metal sealing structure for non-contact end face sealing comprises a rotating shaft (100), a sealing shell (200), a moving ring (300), a static ring (400), a static ring seat (500) and a metal sealing element (1), wherein the moving ring (300) is installed on the rotating shaft (100), the moving ring (300) is matched with the static ring (400), the static ring (400) is matched with the static ring seat (500), the static ring seat (500) is connected with the sealing shell (200) through a spring, a seat ring (501) is arranged on the static ring seat (500) in the axial direction far away from the static ring (400), an annular groove (201) corresponding to the seat ring (501) is arranged on the sealing shell (200), and the seat ring (501) and the annular groove (201) are sealed through the metal sealing element (1);
the method is characterized in that: the metal sealing element (1) is integrally in a closed circular ring shape, and the metal sealing element (1) comprises an inner sealing arm ring (11) and an outer sealing arm ring (12);
a V-shaped open slot (14) is formed between the inner sealing arm ring (11) and the outer sealing arm ring (12), the inner side surface of the inner sealing arm ring (11) is a raised arc surface and is marked as an inner sealing lip (110), the inner sealing lip (110) is matched with the stationary ring seat (500), the outer side surface of the outer sealing arm ring (12) is a raised arc surface and is marked as an outer sealing lip (120), and the outer sealing lip (120) is matched with the sealing shell (200);
the inner sealing arm ring (11) and the outer sealing arm ring (12) are intersected and extend out of a supporting arm ring (13), the end face of the supporting arm ring (13) is used as a positioning face (131), and the positioning face (131) is tightly contacted with the annular groove (201);
the outer side wall of the annular groove (201) is radially provided with a circle of groove, a clamping ring (3) is embedded into the groove, and the part, protruding out of the groove, of the clamping ring (3) is connected with the open groove (14) through a positioning ring (2) and used for limiting the metal sealing element (1).
2. The metal seal structure for noncontact end-face sealing according to claim 1, wherein: the side of the open slot (14) close to the inner sealing arm ring (11) is an axial straight-side wall.
3. The metal seal structure for a non-contact end face seal according to claim 1, characterized in that: the inner side surface of the positioning ring (2) is a straight side wall and is matched with the straight side wall of the inner sealing arm ring (11).
4. The metal seal structure for noncontact end-face sealing according to claim 1, wherein: the opening included angle alpha of the opening groove (14) is 30-60 degrees.
5. The metal seal structure for noncontact end-face sealing according to claim 1, wherein: the annular surface of the outer sealing lip (120) matched with the sealing shell (200) is an outer sealing area, the annular surface of the inner sealing lip (110) matched with the seat ring (501) of the static ring seat (500) is an inner sealing area, and the area of the inner sealing area is smaller than that of the outer sealing area.
6. The metal seal structure for noncontact end-face sealing according to claim 1, wherein: the surface roughness of the inner sealing lip (110) and the surface roughness of the outer sealing lip (120) are both less than or equal to Ra1.6 mu m.
7. The metal seal structure for noncontact end-face sealing according to claim 1, wherein: and the surfaces of the inner sealing lip (110) and the outer sealing lip (120) are subjected to copper plating and silver plating treatment, the copper plating layer is positioned at the bottom layer, the thickness of the copper plating layer is 10-15 mu m, and the thickness of the silver plating layer is 120-150 mu m.
8. The metal seal structure for noncontact end-face sealing according to claim 1, wherein: the radial dimension D1 of the inner sealing arm ring (11) is 1/3-1/4 of the radial dimension D1 of the outer sealing arm ring (12).
9. The metal seal structure for noncontact end-face sealing according to claim 1, wherein: the cross section of the metal sealing element (1) has the following dimensions: the axial dimension H of the metal sealing element (1) is 5-15 mm, the radial dimension D1 of the inner sealing arm ring (11) is 0.5-1 mm, the radial dimension D2 of the outer sealing arm ring (12) is 1.5-2.5 mm, the dimension D3 of the positioning surface (131) is 1.0-3.5 mm, the arc-shaped radius R1 of the bulge of the inner sealing lip (110) is 1.5-4 mm, and the arc-shaped radius R2 of the bulge of the outer sealing lip (120) is 6-10 mm.
CN202011459796.9A 2020-12-11 2020-12-11 Metal sealing structure for non-contact end face sealing Active CN112576757B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011459796.9A CN112576757B (en) 2020-12-11 2020-12-11 Metal sealing structure for non-contact end face sealing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011459796.9A CN112576757B (en) 2020-12-11 2020-12-11 Metal sealing structure for non-contact end face sealing

Publications (2)

Publication Number Publication Date
CN112576757A CN112576757A (en) 2021-03-30
CN112576757B true CN112576757B (en) 2023-01-17

Family

ID=75131541

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011459796.9A Active CN112576757B (en) 2020-12-11 2020-12-11 Metal sealing structure for non-contact end face sealing

Country Status (1)

Country Link
CN (1) CN112576757B (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20217983U1 (en) * 2002-11-20 2003-02-13 Burgmann Dichtungswerke Gmbh Secondary sealing element
EP3622205A4 (en) * 2017-05-09 2021-03-10 Saint-Gobain Performance Plastics Corporation Seal, assembly, and methods of using the same
CN107588038B (en) * 2017-10-11 2023-06-23 西安航天动力研究所 Mechanical sealing structure of turbine pump
CN108194406B (en) * 2017-12-28 2019-07-16 西安航天动力研究所 It is a kind of can the late release moment mechanically-sealing apparatus
CN108413040A (en) * 2018-05-16 2018-08-17 苏州科耐迈克低温装备科技有限公司 Lip mechanically-sealing apparatus

Also Published As

Publication number Publication date
CN112576757A (en) 2021-03-30

Similar Documents

Publication Publication Date Title
CN109162955B (en) End surface labyrinth combined automatic disengaging type dynamic sealing device for engine turbo pump
CN107588038B (en) Mechanical sealing structure of turbine pump
CN112576757B (en) Metal sealing structure for non-contact end face sealing
CN111810253A (en) Double-end-face dry air sealing device for industrial steam turbine
CN207880077U (en) A kind of rotation PTFE oil sealings
CN110285218B (en) Constant-elasticity film-coating involute spiral groove long-life sealing device
CN112012954B (en) Turbo pump sealing mechanism and turbo pump
CN211820745U (en) Precision machinery rotating sealing device
CN2861538Y (en) Mechanical shaft seal for compressor
CN201475552U (en) Rotating joint with temperature difference area structure
CN211501733U (en) Ultralow-temperature upper-mounted soft sealing ball valve seat
CN210178930U (en) Gas spring mechanical seal
CN209687780U (en) A kind of dynamic sealing device reused suitable for low-temperature and high-speed
CN113202945A (en) Plug sealing ring for cryogenic valve
CN220365949U (en) High-efficient durable graphite sealing device
CN218439762U (en) Sealing structure
CN220706406U (en) Dry gas sealing device for auxiliary sealing of piston ring
CN207178723U (en) A kind of floating type hard sealing structure in metal valve
CN218408509U (en) Sealing device of aviation motor
CN216477856U (en) Combined floating sealing structure of oil-free dry type screw compressor
CN219774793U (en) Dry gas sealed annular floating seal ring structure
CN216200781U (en) Valve seat for low-temperature ball valve
CN214534602U (en) Underwater control valve
CN218440774U (en) Program control valve for S-Zorb device
CN215949917U (en) Water pump sealing structure

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant