DE3104200C2 - Mechanical seal with cooled sliding surface - Google Patents
Mechanical seal with cooled sliding surfaceInfo
- Publication number
- DE3104200C2 DE3104200C2 DE3104200A DE3104200A DE3104200C2 DE 3104200 C2 DE3104200 C2 DE 3104200C2 DE 3104200 A DE3104200 A DE 3104200A DE 3104200 A DE3104200 A DE 3104200A DE 3104200 C2 DE3104200 C2 DE 3104200C2
- Authority
- DE
- Germany
- Prior art keywords
- sealing
- rings
- seal
- ring
- cooling
- 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
Links
- 238000007789 sealing Methods 0.000 claims abstract description 25
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 239000002826 coolant Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 claims description 2
- 230000004888 barrier function Effects 0.000 claims 1
- 238000009835 boiling Methods 0.000 claims 1
- 239000000498 cooling water Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 claims 1
- 230000002706 hydrostatic effect Effects 0.000 claims 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/3404—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
- F16J15/3408—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
- F16J15/3412—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities
- F16J15/3416—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities with at least one continuous groove
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Sealing (AREA)
Abstract
Die Gleitringdichtung mit gekühlter Gleitfläche für eine Hochdruckwellenabdichtung an Kesselspeisepumpen, Hauptkühlmittelpumpen o.dgl., besteht aus zwei Grundringen (5, 12), von denen der eine (12) mit der Pumpenwelle (1) umläuft und der andere (5) im Pumpengehäuse (2) axial verschieblich befestigt und an den rotierenden Teil heranführbar ist. Dabei dienen zusätzliche Gleitringe (20, 19), die an den Grundringen (5, 12) anliegen, als Dichtringe. Zur effektiveren Gleichflächenkühlung sind an einem der Gleitringe (19) an der der Dichtstelle zugewandten Seite spiralenförmige Rillen (24) angeordnet, die der Bildung eines Kühlkreislaufes dienen und deren Enden deshalb in Verbindung mit dem Sperrwasser bzw. dem abzudichtenden Medium stehen.The mechanical seal with a cooled sliding surface for a high-pressure shaft seal on boiler feed pumps, main coolant pumps or the like, consists of two base rings (5, 12), one of which (12) rotates with the pump shaft (1) and the other (5) in the pump housing ( 2) is attached axially displaceably and can be brought up to the rotating part. Additional slide rings (20, 19), which rest against the base rings (5, 12), serve as sealing rings. For more effective uniform surface cooling, spiral grooves (24) are arranged on one of the sliding rings (19) on the side facing the sealing point.
Description
dieser Schrägstelle ist ein Fassungsring 8, der mit Hilfe der Befestigungsschraube 6 gehalten wird. Der Fassungsring 8 weist an seiner Innenseite eine Nut auf, in der ein elastischer Haltering 7 eingefügt ist Dieser hat den Zweck, daß der Gleitring 2 geringfügig ausweichen kann. Mit Hilfe von Mitnehmerstiften 3 ist die Befestigung mit dem Gehäuse 2 gegeben. Die Mitnehmerstifte 3 sind im Grundring 5 zur Hälfte fest eingetrieben. Der herausragende Teil ist in einem Sackloch des Gehäuses 2 eingefügt, derart, daß eine axiale Verschiebung des Grundringes 5 leicht möglich ist Durch Anpreßfedern 4 wird der Grundring 5 stets in Richtung der Dichtfläche gedrücktthis inclined point is a mounting ring 8, which is held with the aid of the fastening screw 6. The mounting ring 8 has a groove on its inside, in which an elastic retaining ring 7 is inserted the purpose that the sliding ring 2 can move slightly. With the help of driving pins 3 is the attachment given with the housing 2. The driving pins 3 are firmly driven in half in the base ring 5. Of the protruding part is inserted in a blind hole of the housing 2, such that an axial displacement of the Base ring 5 is easily possible By compression springs 4, the base ring 5 is always in the direction of the sealing surface pressed
An der Welle 1 ist nun als Gegenstück der rotierende Grundring 12 befestigt Auch dieser ist im Querschnitt is winkelförmig ausgebildet und wird mit Hilfe eines Wellenführungsringes 14 auf der Welle 1 geführt Der WeI-lenführungsring 14 ist durch Befestigungsschrauben 15 am Bund der Welle 1 festgehalten. Zwischen dem Grundring 12 und dem Wellenführunpring 14 ist noch eine Aussparung vorgesehen, in der ebenfalb ein Q-Ring 16 und der dazugehörige Stützring 18 eingelegt istThe rotating counterpart is now on shaft 1 Base ring 12 attached, this is also shown in cross section formed angularly and is guided on the shaft 1 with the help of a shaft guide ring 14 The shaft guide ring 14 is held by fastening screws 15 on the collar of the shaft 1. Between the Base ring 12 and the wave guide ring 14 is still a recess is provided, in which also a Q-ring 16 and the associated support ring 18 is inserted
Um eine kraftschlüssige Verbindung des rotierenden Grundringes 12 zwischen Pumpenwelle 1, d.h. dem Wellenführungsring 14 zu erhalten, sind noch Mitnehmerstifte 13, die in gleicher Weise am Umfang verteilt, wie im Grundring 5 angedeutet, sind. Zwischen diesen beiden Grundringen 5 und 12 ist ein gewisser Abstand vorgesehen, in dem nun die Gleitringe 19 und 20 untergebracht sind. Diese sind in der äußeren Form etwa gleich, nur sind an einem von beiden, in diesem Fall im Gleitring 19, die erfindungsgemäßen Rillen 24 angebracht Diese Rillen 24 sind gleichmäßig verteilt und haben zwei bis acht vorzugsweise vier Gänge. Der Rillenabstand voneinander beträgt etwa das Dreifache der Breite der einzelnen Riiie 24. Hierbei ist vorzugsweise das Querschnittsverhältnis von 1 :1 festgelegtIn order to establish a positive connection of the rotating base ring 12 between the pump shaft 1, i.e. the To get shaft guide ring 14, drive pins 13, which are distributed in the same way on the circumference, as indicated in the base ring 5 are. There is a certain distance between these two base rings 5 and 12 provided, in which the sliding rings 19 and 20 are now housed. These are roughly in the outer shape the same, only the grooves 24 according to the invention are attached to one of the two, in this case in the sliding ring 19 These grooves 24 are evenly distributed and have two to eight, preferably four turns. The groove spacing from each other is approximately three times the width of the individual line 24. It is preferred here the aspect ratio of 1: 1 is set
Auch hier ist der Gleitring 19 durch den Fassungsring 9 festgehalten, wobei dieser durch Befestigungsschrauben 10 mit dem Grundring 12 verbunden ist Eine Abschrägung an der Außenseite des Gleitringes 19 sorgt dafür, daß der Fassungsring 9 durch den elastischen Haltering festhältHere, too, the sliding ring 19 is held in place by the mounting ring 9, this being carried out by fastening screws 10 is connected to the base ring 12. A bevel on the outside of the sliding ring 19 provides that the mounting ring 9 is held by the elastic retaining ring
Die F i g. 2 zeigt die Draufsicht auf den Gleitring 19, wobei hier in geeigneter Weise der spiralenförmige Verlauf der Rillen 24 angedeutet ist Im Beispiel wurden lediglich drei Rillen 24 eingezeichnet um die Anordnung besser veranschaulichen zu können. Es ist von Vorteil, die Spirale in Drebrichtung und in Richtung des Druckabfalles anzuordnen, d. h. daß das einzuführende Kühlmedium selbsttätig bei Drehung in die spiralenförmigen Rillen 24 gebracht wird. Hierbei wird erreicht, daß ein verstärkter Durchfluß bei Rotation durch Schleppwirkung erzielbar ist Dies hat vor allem im Betrieb bei kleineren Drücken seinen Vorteil. Die Spiralenförmigen Rillen 24 sind an ihren Enden in Verbindung mit dem Sperrwasser bzw. dem abzudichtenden Medium, so daß diese zur Bildung eines Kühlki eislaufes herangezogen werden.The F i g. 2 shows the plan view of the sliding ring 19, the spiral-shaped one here in a suitable manner The course of the grooves 24 is indicated. In the example, only three grooves 24 have been drawn around the arrangement to be able to illustrate better. It is advantageous to keep the spiral in the direction of rotation and in the direction of the To arrange pressure drop, d. H. that the cooling medium to be introduced automatically when rotating in the spiral-shaped Grooves 24 is brought. What is achieved here is that an increased flow rate through rotation Towing effect is achievable This has its advantage especially in operation at lower pressures. The spiral-shaped Grooves 24 are at their ends in connection with the sealing water or the medium to be sealed, so that these are used to form a cooling ski ice skating will.
Diese Ausbildung der spiralenförmigen Rillen 24 im eo Gleitring hat den Vorteil, daß man das Kühlmedium dort einwirken lassen kann, wo die Wärme entsteht, nämlich an den Dichtflächen. This formation of the spiral-shaped grooves 24 in the sliding ring has the advantage that the cooling medium can act where the heat is generated, namely on the sealing surfaces.
Hierzu λ Blatt ZeichnungenFor this purpose λ sheet drawings
Claims (2)
den rotierenden Teil heranführbar ist, wobei zusatz- io Aus der US-PS 35 27 465 ist eine Gleitringdichtung liehe Gleitringe, die an den Grundringen anliegen, bekannt, bei der keine Kühlung der Dichtflächen angeals Dichtringe dienen, dadurch gekenn- strebt wird. Von der Druck- zur Saugseite ist keine zeichnet, daß an einem der Gleitringe (19) an der durchgehende Verbindung vorhanden. Es wird vielmehr der Dichtstelle zugewandten Seite durchgehende ein hydrostatischer Druckverlauf vorgeschlagen, der spiralenförmige Rillen (24) angeordnet sind, die zur 15 veranschaulicht, daß die spiralenförmigen Rillen nur bis Bildung eines Kühlkreislaufes dienen und in Dreh- zu einem bestimmten Durchmesserbereich der Dichrichtung im Sinne des Druckabfalles angeordnet tung geführt sind und dort enden,
sind. Aus der US-PS 34 66 052 ist eine Dichtung bekannt,Mechanical seal with cooled sliding surface for two insert rings which, if necessary, can be pressed against each other as a high-pressure shaft seal on the boiler and 5 and thus represent the seal. Feed pumps, main coolant pumps or the like, would be conceivable here, too, at the appropriate point with a cooling stand made up of two base rings, one of which is to supply medium in such a way that the insert rings revolve along with the pump shaft and the other is appropriately cooled are attached, from ^ r the pump housing axially displaceable and the prerequisites for this are not given,
the rotating part can be brought up, in addition, from US Pat. No. 3,527,465, a mechanical seal lying sliding rings that rest on the base rings is known, in which no cooling of the sealing surfaces are used as sealing rings, which means that it is sought. From the pressure side to the suction side there is no sign that one of the sliding rings (19) is present on the continuous connection. Rather, a continuous hydrostatic pressure curve is proposed, the side facing the sealing point, the spiral-shaped grooves (24) are arranged, which illustrates that the spiral-shaped grooves are only used until the formation of a cooling circuit and in rotation to a certain diameter range of the sealing direction in the sense of Pressure drop arranged device and end there,
are. From US-PS 34 66 052 a seal is known,
als Dichtringe dienen. Ausgehend von dem eingangs geschilderten Stand Bei Dichtungen für den Höchi-'iruckbereich, d. h. der Technik, liegt der Erfindung die Aufgabe zugrunde, Gleitgeschwindigkeiten von raihr als 20 m/s, Dichtdrük- die erwähnten Nachteile zu vermeiden und das Medium ke über 5 MPa und Belastungen von mehr als 50 MW/ dort einwirken zu lassen, wo die Wärme entsteht, nämm2 müssen spezielle Vorkehrungen getroffen werden, 35 Hch an den Dichtflächen.The invention relates to a mechanical seal with ge to prevent leakage current. This sealing effect is achieved on the cooled sliding surface for a high-pressure shaft seal by the fact that the direction of rotation of the grooves runs in the opposite direction to the boiler and feed pumps, main coolant, so that the escaping medium is pumped over and over again or, alternatively, consisting of two base rings, is pumped back by. Such sealing devices are in which the one rotates with the pump shaft and the one in the art has been known for a long time and are, for example, fastened axially displaceably in the pump housing, for sealing out of housings and can be brought up to the rotating part, the shafts using a cooling of the sealing surfaces however, there is no additional slide rings that rest on the base rings, 30 with a cooling medium
serve as sealing rings. On the basis of the state described at the beginning. In seals for the high-pressure range, ie technology, the invention is based on the object of avoiding sliding speeds of more than 20 m / s, sealing pressures, the disadvantages mentioned and the medium being above 5 MPa and Loads of more than 50 MW / to act where the heat is generated, namely 2 special precautions must be taken, 35 Hch on the sealing surfaces.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT0130280A AT365747B (en) | 1980-03-10 | 1980-03-10 | MECHANICAL SEAL WITH COOLED SLIDING SURFACE |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3104200A1 DE3104200A1 (en) | 1981-12-10 |
DE3104200C2 true DE3104200C2 (en) | 1986-03-27 |
Family
ID=3510947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3104200A Expired DE3104200C2 (en) | 1980-03-10 | 1981-02-06 | Mechanical seal with cooled sliding surface |
Country Status (6)
Country | Link |
---|---|
AR (1) | AR222935A1 (en) |
AT (1) | AT365747B (en) |
DE (1) | DE3104200C2 (en) |
FR (1) | FR2477663A1 (en) |
GB (1) | GB2071231A (en) |
IT (1) | IT8147938A0 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19651524A1 (en) * | 1996-12-11 | 1998-06-18 | Siemens Ag | Secondary seal for main coolant pump of nuclear power station |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4746268A (en) * | 1987-07-29 | 1988-05-24 | Hitachi, Ltd. | End face mechanical shaft seal for use in hydraulic machines and seal ring assembly for use in the shaft seal |
DE20103013U1 (en) * | 2001-02-20 | 2001-06-13 | Burgmann Dichtungswerke GmbH & Co. KG, 82515 Wolfratshausen | Liquid seal assembly |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL4525C (en) * | 1900-01-01 | |||
FR1505487A (en) * | 1966-10-28 | 1967-12-15 | Guinard Pompes | Improvement in leak-controlled rotary joints |
US3466052A (en) * | 1968-01-25 | 1969-09-09 | Nasa | Foil seal |
US3499653A (en) * | 1968-06-05 | 1970-03-10 | Crane Packing Co | Rotary mechanical seal of the gap type |
DE1775324C3 (en) * | 1968-07-27 | 1974-01-10 | Klein, Schanzlin & Becker Ag, 6710 Frankenthal | Mechanical seal |
-
1980
- 1980-03-10 AT AT0130280A patent/AT365747B/en not_active IP Right Cessation
-
1981
- 1981-02-06 DE DE3104200A patent/DE3104200C2/en not_active Expired
- 1981-02-27 AR AR284456A patent/AR222935A1/en active
- 1981-03-02 FR FR8104257A patent/FR2477663A1/en active Pending
- 1981-03-02 GB GB8106457A patent/GB2071231A/en not_active Withdrawn
- 1981-03-03 IT IT8147938A patent/IT8147938A0/en unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19651524A1 (en) * | 1996-12-11 | 1998-06-18 | Siemens Ag | Secondary seal for main coolant pump of nuclear power station |
Also Published As
Publication number | Publication date |
---|---|
FR2477663A1 (en) | 1981-09-11 |
IT8147938A0 (en) | 1981-03-03 |
GB2071231A (en) | 1981-09-16 |
DE3104200A1 (en) | 1981-12-10 |
ATA130280A (en) | 1981-06-15 |
AR222935A1 (en) | 1981-06-30 |
AT365747B (en) | 1982-02-10 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8110 | Request for examination paragraph 44 | ||
D2 | Grant after examination | ||
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |