CN1009130B - The end face mechanical shaft seal and the ring assembly that is used for this envelope that are used for hydraulic machinery - Google Patents
The end face mechanical shaft seal and the ring assembly that is used for this envelope that are used for hydraulic machineryInfo
- Publication number
- CN1009130B CN1009130B CN87105344A CN87105344A CN1009130B CN 1009130 B CN1009130 B CN 1009130B CN 87105344 A CN87105344 A CN 87105344A CN 87105344 A CN87105344 A CN 87105344A CN 1009130 B CN1009130 B CN 1009130B
- Authority
- CN
- China
- Prior art keywords
- ring
- piece
- face
- seal
- seal ring
- 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.)
- Expired
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Mechanical Sealing (AREA)
Abstract
The end face mechanical shaft seal that is used for hydraulic machinery comprises a ring assembly, and the sealing ring member has the sealing surfaces that contacts with sealing surfaces sealing in the hydraulic machinery rotating shaft.The sealing ring member is a set type, and it comprises a seal ring, and seal ring is made up of the ring piece that a plurality of edges circumferentially link to each other.These ring pieces partly are contained in the circular groove in the ring set, and are fixed up by Bond, thereby solve the breakable problem of ring piece, and prevent that fluid from leaking along rotating shaft.
Description
The present invention relates to be used for large-scale hydraulic machinery, as the end face mechanical shaft seal in water turbine and the water pump, this axle envelope can prevent that fluid from leaking along the rotating shaft of machinery.The invention still further relates to the suit type ring assembly that is used for this axle envelope.
In " waterpower " (Water Power) 309-314 page or leaf of publishing in August, 1973, with at the open NO.12678/1983(of Japanese Utility Model at the open NO.14377/1987 of back examination) in, a kind of typical traditional end face axle envelope that is used for large-scale hydraulic machinery is disclosed.
This known axle envelope is shown among Figure 10, it has in the rotating shaft 51 that is fixed on hydraulic machinery and the annular flange 55 of seat surface is provided, circular casing 56 around flange 55, one can be along the annular sealing ring retaining member 53 of rotating shaft 51 axial motions, an annular sealing ring 52, one is used for seal ring 52 is fastened on clamping ring 54 on the seal ring retaining member, and a plurality ofly is used for clamping ring is fixed on the seal ring retaining member so that seal ring is clamped in bolt 57 between clamping element and the seal ring retaining member.Seal ring 52 is made up of a plurality of piecemeals (hereinafter referred to as the ring piece), and each ring piece all is fan-shaped or arc.These ring pieces are clamped between seal ring retaining member 53 and the clamping element 54, upwards are continuous seal ring 52 to be formed in week.In this axle envelope, the ring piece of all in fact seal rings 52 is all clamped equably.This be because, do not fit tightly each other if respectively encircle the end face of piece, then the seal face of seal ring can become unsmooth and circumferentially discontinuous, internal flow therefrom spilt.For fear of this defective, all respectively encircle piece and are all clamped equably in fact, and are subjected to precision machining so that obtain required axial thickness.
The piece that respectively encircles of seal ring is made by plastics, graphite or pottery that fiber is strengthened usually.Use these materials to be difficult to the dimensional accuracy that reaches high, so the cost of production of seal ring has improved.Another problem of using this known axes envelope to run into is, because the piece that respectively encircles of seal ring 52 directly is clamped between seal ring retaining member 53 and the clamping ring 54, therefore these ring pieces are easy to crushed or broken because of the excessive clamping force of clamping ring 54, particularly when these ring pieces be when so more crisp material is made by graphite or pottery, especially like this.
Therefore, the purpose of this invention is to provide a kind of simple in structurely but be easy to provide the set type ring assembly of the high level and smooth seal face of dimensional accuracy, overcome the problem in the above-mentioned prior art thus.
Another object of the present invention provides a kind of improved end face mechanical shaft seal that is used for hydraulic machinery, and it has above-mentioned ring assembly.
According to an aspect of the present invention, provide a kind of ring assembly that is used for the end face mechanical shaft seal.This assembly comprises the seal ring set of an annular, and this ring set has an end face that is essentially annular, and the end face internal shaping has a groove that is essentially annular, and a seal ring is partly packed in this groove and utilized adhesive on ring set.Seal ring is made up of a plurality of ring pieces, inner radial surface and outer surface that each ring piece all has the cross section that is essentially arc and is essentially the cylndrical surface, and two axial end face and bi-side.Each encircles piece and all is placed in the circular groove, and wherein an end face of each ring piece is contained in the groove, and another end face axial outwards protrudes from the end face of ring set.Each encircles piece and side by side arranges along circumference against each other, to constitute seal ring.It is all in the same plane basically that each encircles another end face of piece, level and smooth basically and along circumferential continuous seal surface basically to provide one.
According to a further aspect in the invention, provide a kind of end face mechanical shaft seal that is used for hydraulic machinery, this envelope has the ring assembly of said structure.
The present invention has following advantage:
(1) because ring assembly is a set type, so it can be installed in axle easily and seal up, and is easy to therefrom take off;
(2) since constitute seal ring respectively encircle piece by the ring set clamping, can be mounted and compress so respectively encircle piece, and do not have the danger of any damage, even, also be like this when ring piece during by graphite or ceramic these more crisp made;
(3) the ring piece of seal ring does not need precision machining,, has a level and smooth sealing surface in order to make whole ring assembly that is, can the end face of ring piece be processed, to make level and smooth end face encircling after piece is assembled in the ring set.Therefore, cost of production significantly reduces, and just can realize the high-seal effect in its work incipient stage;
(4) might obtain large diameter seal ring.
From following explanation, can understand these and other purpose of the present invention, feature and advantage more expressly.
Fig. 1 is the partial sectional view according to an embodiment of axle envelope of the present invention.
Fig. 2 is the sectional view along Fig. 1 center line II-II.
Fig. 3 is the amplification view along Fig. 2 center line III-III.
Fig. 4 is the sectional view along the IV among Fig. 1-IV line.
Fig. 5 A-5E is the perspective view of expression ring assembly manufacture process.
Fig. 6 is the unfolded drawing of ring assembly, shows sealing surface, owing to each variable thickness of encircling piece causes, so the sealing face is not level and smooth.
Fig. 7 is similarly the scheming with Fig. 3 of ring assembly of expression remodeling.
Fig. 8 is the partial sectional view according to another embodiment of axle envelope of the present invention.
Fig. 9 is the partial vertical sectional view that has the water turbine of axle envelope of the present invention.
Figure 10 is the partial vertical sectional view of the prior art discussed of front.
At first referring to Fig. 9, this is a partial vertical sectional view of having used water turbine of the present invention.Wherein water turbine has a rotating shaft 1, and an end of this rotating shaft is connected with impeller 3.The draft tube 4 that constitutes the water route is equipped with stator 5, and this stator is positioned near the impeller 3 and is suitable for regulating water flow.By the end face mechanical shaft seals of the overall indication of label 100, be used to stop water to pass through the clearance leakage of 1 of shell 2 and rotating shaft.
In Fig. 1, the form of analysing and observe with partial vertical has been represented an embodiment of end face mechanical shaft seal (hereinafter to be referred as the axle envelope).
Ring packing shell 102 is fixed on the water wheels casing 2.Capsul 102 has peripheral wall part 9 and ring cover part 11 of an annular.For large-scale water turbine, be difficult to part 9 and 11 is made a single piece respectively.Therefore, peripheral wall part 9 and cover 11 are made of two semiorbicular half parts respectively, and these half parts are assembled each other by bolt 13 and 16 respectively, and the assembling mode of this and flange 6 is similar.Two and half parts of peripheral wall part 9 have welding projection 9A thereon in their attachment portion.At the relative projection 9A of two longitudinal ends of peripheral wall part half parts, by bolt 13 being screwed in the hole in the projection and fixed to one another, make the two halves parts be assembled into a complete annular peripheral wall section 9 each other thus.Similarly, two semi-circular half parts of cover 11 are tightened together by the projection 11A place of bolt 16 at them, and this bolt 16 passes the hole that aligns among the projection 11A.
Second parts that are essentially annular, it is a seal ring retaining member by label 10 indications in this example, it is arranged on the inner circumference edge place of cover 11, can be along the axial motion of cover 11.As seen from Figure 4, seal ring retaining member 10 constitutes (also can be made of a plurality of arc section pieces certainly) by two semiorbicular half parts 10A and 10B, be welded with projection 22 at the two circumferential end 28A and the 28B place of half parts 10A and 10B outer surface respectively, bolt 23 passes the hole in the projection 22, and tights a bolt 23 so that half parts 10A and 10B are tightened together with nut 23A.
The cross section of seal ring retaining member 10 is essentially L shaped.Seal ring 14 is embedded in the circular groove on the seal ring retaining member 10 upper end portion external peripheral surfaces.Seal ring 14 is with the inner peripheral surface sliding contact of fluid-tight form and cover 11.There is an annular flange underpart of seal ring retaining member 10, and an end of a plurality of upright pins 24 is fastened in this flange.The rear surface of cap 11 has a plurality of guide holes 34, and the other end of pin 24 is packed in this guide hole slidably, makes that pin 24 can axially motion in guide hole 34.On each pin 24, all twining a compression helical spring 8, to produce a downward power, with seal ring retaining member 10 flexibly biasing downwards.Pin 24 is as retainer, to stop seal ring retaining member 10 around self rotational.The a plurality of pins 24 that are wound with spring 8 along a circumference with suitable pitch arrangement.
Set-up modes of these rings piece 112A are, their an axial end 112A-3 is contained in the groove 120, and another end face 112A-4 axially outwards protrudes from the end face 132 of ring set 117.The arrangement mode of ring piece is that the adjacent circumferential end faces of every pair of adjacent ring piece against each other.It is concordant each other basically that each encircles another axial end 112A-4 of piece 112A, circumferentially is being essentially continuous and level and smooth basically annular seal surface 113 to provide one.
The sealing surfaces 113 of seal ring 112 and seat surface 21 sliding contacts of flange 6, so that fluid-tight to be provided, sealing can prevent effectively that internal flow from passing through the clearance leakage between the outer surface of capsul 102 and rotating shaft 1.
As seen from Figure 2, in this embodiment, ring set 117 arc partly overlapped 117A and forms (also can be made up of a plurality of arc section pieces certainly) by a pair of, and seal ring 112 is formed (as previously mentioned) by four ring piece 112A.The adjacent circumferential end faces of two and half cover 117A of seal ring set 117 against each other, simultaneously the adjacent circumferential end faces of seal ring 112 adjacent ring pieces is also against each other.Two 112 liang of adjacency of part 117A ' and seal ring that recline of partly overlapping 117A are in identical circumferential position to encircling the part 112A ' that reclines of piece 112A.In other words, recline part 117A ' and 112A ' aligns diametrically.
As seen from Figure 3, the size of seal ring set 117 and seal ring 112 is designed to form gap h between the side of groove 120 and ring piece 112A
1And h
2One layer binder 124 is injected into gap h
1And h
2In, thus each ring piece 112A is fixed on the wall of ring set 117.
In the embodiment shown in fig. 3, be formed with a pair of narrow ditch 125 in the bottom of the groove 120 of ring set 117.This communicates with each other to the passage 126 that the too much bar of narrow communication radially extends.Radially by inner peripheral surface 117 by many further passages 127 and ring set 117 of the narrow ditch 125 of lining ' communicate, passage 127 radially passes ring set 117.Narrow ditch 125 and the passage 126,127 that is communicated with can will enter into the slit fluid of 112 of the bottom of groove 120 of ring set 117 and seal rings, discharge seal ring sets 117 by radial passage 127.Therefore, just might eliminate the danger of the ring piece 112A of seal ring 112 being released groove 120 owing to the pressure of fluid in the groove 120.Narrow ditch 125 also is used to discharge Bond, and it prevents that effectively Bond from accumulating in the bottom of groove 120 and respectively encircle between the interior edge face of piece 112A.Like this, ring piece 112A can directly contact with the bottom of groove 120, can avoid the thickness fluctuating of the ring piece 112A that mentions later thus, not so, encircling after piece 112A is bonded to seal ring 112, this thickness fluctuating will occur.
About making the method for ring assembly 101,, be illustrated by way of example with reference to Fig. 5 A-5E and Fig. 6.
About the dimensional accuracy of ring piece, when its axial dimension precision does not resemble its radial dimension precision when so high, the fluctuating on the axial thickness must appear in a plurality of ring piece 112A, therefore between adjacent ring piece 112A, form the step that height is △ t.It in height is inequality that Fig. 6 illustrates ring piece 112A in the mode of exaggerating a little.As can be seen, between adjacent ring piece 112A, form step or height difference △ t respectively
1, △ t
2With △ t
3This height difference presents step on the end face of seal ring 112.Yet, according to the present invention, can carry out mechanical finishing by end face and eliminate these steps seal ring, it is level and smooth basically that ring assembly is had, and be continuous level and smooth end face 113 circumferentially.Be appreciated that this machining is because all ring piece 112A are contained in the groove 120 of ring set 117 securely just is achieved.Perhaps, level and smooth, the continuous end face of seal ring also can obtain in the following manner: all ring piece 112A are placed on the even curface, they are carried out machining makes all ring piece 112A all have identical height, shown in Fig. 5 D, the ring piece 112A after the processing is placed in the groove 120 of ring set 117 then.Obviously, it is very even on thickness if plate 131 had been subjected to finishing, can guarantee from all ring piece 112A of last cutting-out all very consistent, thereby make ring piece 112A that level and smooth and circumferential continuous seal ring end face 113 is provided under the state after the assembling, so just needn't the end face 112A-4 of ring piece 112A be processed again.
At work, seal ring retaining member 10 is by pin 24 guiding, in the axial motion of rotating shaft 1, and flexibly setovered towards flange 6 by helical spring 8.The result is, is fixed on the seal ring 112 in the ring assembly 101 of seal ring retaining member 10 lower ends, with contact with seat surface 21 fluid-tight of flange 6 and slidably mode be held.Simultaneously, the inner peripheral surface of the seal ring 14 on the outer circumferential face of seal ring retaining member 10 and the cap 11 of capsul 102 fluid-tight slidably contacts, and prevents that thus the slit (as shown in Figure 9) that fluid passes through 1 of the shell 2 of impeller 3 and rotating shaft from leaking.
Fig. 7 has represented to have a kind of modification 101A of the ring assembly 101 of said structure.In Fig. 7, identical label is used for indicating parts identical with Fig. 3 or part.The ring assembly 101A of modification has a ring set 117D who is made of ring part 117B and lateral wall piece 117C, ring part 117B presents one and falls L shaped cross section in the plane that comprises assembly 101A axis, lateral wall piece 117C is fastened on the ring part 117B by a plurality of bolts 139, limits a circular groove 120B when assembling with convenient two part 117C and 117B betwixt.The axial external lateral portion of the wall 129 of lateral wall piece 117C radially inner side radially slopes inwardly, as 129 ' shown in.Seal ring 112 ' each ring piece 112B partly be contained among the groove 120B, and partly stretch out groove 120B vertically, each ring piece all has individual radial outside surface 130, the surface 130 and the axial external lateral portion 129 of wall 129 ' inclination as one man tilt.As aforesaid embodiment 101, ring assembly 101A also is the downside that removably is fastened on seal ring retaining member 10 by the screw (not shown).
Another advantage of modification shown in Figure 7 is, can with seal ring 112 ' ring piece 112B be firmly held in more among the groove 120B.
In described embodiment and modification, the seat surface 21 that is essentially annular is provided by first parts, first parts are the flanges 6 that together rotate with rotating shaft 1, and ring assembly 101 or 101A are by the removably clamping of seal ring retaining member 10 that constitutes second parts 10.But, for the person of ordinary skill of the art, obviously ring assembly 101 or 101A can be fixed on first parts 6, and make second parts 10 that seat surface 21 is provided.
Fig. 8 shows another embodiment according to axle envelope of the present invention.This envelope is totally indicated by label 100A, and it has first ring assembly 101, and this assembly is the same with first embodiment to be fixed on the seal ring clamp holder 10.In addition, second identical with first ring assembly, the 101 structures basically ring assembly 101B is detachably fixed on the end face 21C of flange 6.Seal ring 112 and the 112C of two ring assemblies 101 and 101B, the mode with sliding contact is clamped together each other, thereby avoids escape of liquid.The seal ring 112C of the second ring assembly 101B and the seal ring 112 of first ring assembly 101 can be made by same material.
In the embodiment shown in fig. 8, the radial width of seal ring 112 and 112C is different, even like this when runout takes place in the rotating shaft 1 of hydraulic machinery, also can guarantee the tightness of fluid-tight.That is to say that the less seal ring 112 of width can be with the opposing end faces sliding contact of the bigger seal ring 112C of its whole axial end and width, and be not subjected to the influence of the runout of hydraulic machinery rotating shaft 1.When if seal ring 112 and 112C are made by different materials, the most handy softer less seal ring 112 of material width.
When seal ring 112 is made by stupalith, must make the sealing surface that contacts with seal ring 112 with the similar material of hardness.The advantage of structure shown in Figure 8 is, will the generally not too shock proof stupalith manufacturing of whole flange 6 usefulness.
Claims (15)
1, a kind of ring assembly that is used for the end face mechanical shaft seal, this package is drawn together in the rotating shaft that is fixed on hydraulic machinery basic first parts for annular that can together rotate with this rotating shaft, capsul on casing that is sealingly secured to described hydraulic machinery, with one be installed in basic second parts that can move along the axial direction of described rotating shaft on the described capsul but can not rotate with respect to described capsul for annular, described ring assembly is suitable for being removably mounted on in described first and second parts one, so that match with in described first and second parts another, prevent internal flow by the slot leakage between described rotating shaft and the described capsul, it is characterized in that described ring assembly comprises:
The ring set of an annular, it has an end face that is essentially annular, and a groove that is essentially annular is arranged in the end face,
One partly is contained in the described groove and is fixed to seal ring on the described ring set by Bond,
Described seal ring is made up of a plurality of ring pieces, and each ring has the transverse section that is essentially arc soon, is essentially the inner radial surface and the outer surface of cylndrical surface, and two axial end face and bi-side,
The described piece that respectively encircles is placed in the described circular groove, and each end face that encircles piece is contained in the described groove, and the other end axially outwards protrudes from the described end face of described ring set,
The described piece that respectively encircles side by side arranges along circumference against each other, constituting described seal ring,
The described other end of respectively encircling piece is all in the same plane basically, with provide one basic level and smooth, on the basic continuous seal surface that makes progress in week.
2, according to the ring assembly of claim 1, it is characterized in that described ring set is made of a plurality of arc section pieces, each cuts piece all two two circumferential contacted circumferential ends of end with circumferentially adjacent arc section piece, and wherein the every pair of circumferential adjacent attachment portion of cutting interblock is in same position on the circumference with against each other several at least to the attachment portions of encircling the piece end face basically.
3,, it is characterized in that described ring set is essentially semiorbicular half cover and is constituted by a pair of according to the ring assembly of claim 2.
4,, it is characterized in that described ring piece made by graphite, pottery or resin according to the ring assembly of claim 1.
5, according to the ring assembly of claim 1, it is characterized in that being formed with narrow ditch in the bottom of the groove of described ring set, they extend along the both sides end face of described groove, the passage that the too much bar of described narrow communication radially passes described ring set extension communicates with each other, and a narrow ditch of radially inner side communicates with the radially inner side surface of ring set by a further passage that radially passes described ring set at least.
6, according to the ring assembly of claim 1, it is characterized in that described ring set is made of a ring part and an annular sidewall spare, this ring part presents one and is essentially down L shaped cross section in comprising the plane of its axis, described lateral wall piece links to each other with described ring part, so that constitute described groove betwixt, the radially inner side of described lateral wall piece surface is an inclined surface near the part of the axial outer end of described ring set, and the radially-outer surface of described seal ring as one man tilts with the inclination of the inner radial surface of described lateral wall piece basically.
7,, it is characterized in that described Bond is an epoxy adhesive according to the ring assembly of claim 1.
8, a kind of end face mechanical shaft seal that is used for hydraulic machinery comprises:
First parts that thereupon together rotate, that be essentially annular in the rotating shaft that is fixed on hydraulic machinery,
A ring packing shell, it is fixed on the casing of the hydraulic machinery that surrounds the described rotating shaft and first parts in a fluid tight manner,
Second parts that are essentially annular, it is connected with described capsul, and it can be in the axial motion of described rotating shaft, and can not rotate relative to described capsul,
A ring assembly, it is detachably fixed in described first and second parts one, and provide a sealing surfaces, the sealing seat surfaces that are essentially annular that another provided surperficial and in described first and second parts match, to prevent that internal flow is by the slot leakage between described rotating shaft and described capsul
Be used for described ring assembly removably be fastened on of described first and second parts element and
An elastic element, it is used for along described second parts of described axial bias, with the sealing surface that keeps described ring assembly sliding and the mode of fluid-tight contacts with described seat surface,
It is characterized in that described ring assembly comprises:
The ring set of an annular, it have one be essentially the annular end face, have in the end face one be essentially the annular groove and
A seal ring, it partly is contained in the described groove, and is fixed on the described ring set by Bond,
Described seal ring is made of a plurality of ring pieces, and each ring piece has the cross section that is essentially arc, is essentially the inner radial surface and the outer surface of cylndrical surface, and two axial end face and side end faces,
Described ring piece is placed in the described circular groove, and wherein an end face of each ring piece is contained in the described groove, and another end face axial outwards protrudes from the end face of described ring set,
Described ring piece side by side arranges along circumference against each other, constituting described seal ring,
It is all in the same plane basically that each encircles another end face of piece, level and smooth basically and on week continuous seal surface basically upwards to provide one.
9, axle envelope according to Claim 8 is characterized in that providing the parts of described seat surface to comprise a flange that is fixed in the described rotating shaft.
10, axle envelope according to Claim 8, it is characterized in that providing the parts of described seat surface to comprise a flange and one second ring assembly that is fixed in the described rotating shaft, second ring assembly has essentially identical structure with the ring assembly of mentioning for the first time, and be detachably fixed to the radially extension end face of described flange, seal ring in first and second ring assemblies is to slide over each other and the form of fluid-tight is clamped together, in case the fluid stopping body leaks.
11, according to the axle envelope of claim 10, it is characterized in that the width of the seal ring of an assembly is wideer than the width of the seal ring of another assembly in described first and second ring assemblies.
12, axle envelope according to Claim 8 is characterized in that described second parts comprise a seal ring retaining member, and sealing ring retaining member has a seal ring, and the sealing circle provides fluid-tight between described seal ring retaining member and capsul.
13, axle envelope according to Claim 8, it is characterized in that described second parts comprise a seal ring retaining member, sealing ring retaining member is equipped with the pin that axially stretches out along it, and the pilot hole that holds described pin is arranged in described capsul, so that at the described pin of the axial lead of described rotating shaft.
14, according to the axle envelope of claim 9, it is characterized in that described flange has a plurality of arc section pieces and bolt, utilize described bolt that described arc section piece is assembled on the outer peripheral surface of described rotating shaft.
15, axle envelope according to Claim 8, it is characterized in that described second parts comprise a seal ring retaining member with a plurality of arc section pieces and bolt, the projection that all is equipped with radially outward to stretch out at two circumferential ends of each section piece, described bolt is used to connect the adjacent projections that the phase adjacency pair cuts piece, thus each section piece is assembled to constitute the seal ring retaining member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105344A CN1009130B (en) | 1987-08-03 | 1987-08-03 | The end face mechanical shaft seal and the ring assembly that is used for this envelope that are used for hydraulic machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN87105344A CN1009130B (en) | 1987-08-03 | 1987-08-03 | The end face mechanical shaft seal and the ring assembly that is used for this envelope that are used for hydraulic machinery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1031886A CN1031886A (en) | 1989-03-22 |
| CN1009130B true CN1009130B (en) | 1990-08-08 |
Family
ID=4815286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN87105344A Expired CN1009130B (en) | 1987-08-03 | 1987-08-03 | The end face mechanical shaft seal and the ring assembly that is used for this envelope that are used for hydraulic machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1009130B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW434375B (en) * | 1995-06-14 | 2001-05-16 | Burckhardt Ag Maschf | Sealing ring |
| SE506370C2 (en) * | 1996-04-29 | 1997-12-08 | Kvaerner Turbin Ab | Sealing system for hydraulic machine |
| CN102313019A (en) * | 2011-08-04 | 2012-01-11 | 丹东克隆集团有限责任公司 | Friction ring type water sealing device |
| JP7118563B2 (en) * | 2019-07-29 | 2022-08-16 | 矢崎総業株式会社 | Sealing material and waterproof structure |
-
1987
- 1987-08-03 CN CN87105344A patent/CN1009130B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1031886A (en) | 1989-03-22 |
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| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |