CN1019206B - Cathodic corrosion-preventing device for sternshaft tube of ship - Google Patents

Cathodic corrosion-preventing device for sternshaft tube of ship

Info

Publication number
CN1019206B
CN1019206B CN88109213A CN88109213A CN1019206B CN 1019206 B CN1019206 B CN 1019206B CN 88109213 A CN88109213 A CN 88109213A CN 88109213 A CN88109213 A CN 88109213A CN 1019206 B CN1019206 B CN 1019206B
Authority
CN
China
Prior art keywords
ring
axle sleeve
housing
consumable anode
electric current
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
Application number
CN88109213A
Other languages
Chinese (zh)
Other versions
CN1035141A (en
Inventor
冈特·梅维斯
厄恩斯特-彼得·冯堡根
冈特·皮什
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.)
Blohm and Voss GmbH
Original Assignee
Blohm and Voss GmbH
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 Blohm and Voss GmbH filed Critical Blohm and Voss GmbH
Publication of CN1035141A publication Critical patent/CN1035141A/en
Publication of CN1019206B publication Critical patent/CN1019206B/en
Expired legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
    • C23F13/00—Inhibiting corrosion of metals by anodic or cathodic protection
    • C23F13/02—Inhibiting corrosion of metals by anodic or cathodic protection cathodic; Selection of conditions, parameters or procedures for cathodic protection, e.g. of electrical conditions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/36—Shaft tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H23/00—Transmitting power from propulsion power plant to propulsive elements
    • B63H23/32—Other parts
    • B63H23/321—Bearings or seals specially adapted for propeller shafts
    • B63H2023/327—Sealings specially adapted for propeller shafts or stern tubes

Abstract

In a ship which is equipped with a seal arrangement comprising a metallic housing fixed to the stern tube and one or more sealing rings of rubber elastic material which are connected with the housing and cooperate with the running sleeve of the propeller shaft, wherein block-like sacrificial anodes exposed to the seawater are secured to the component to be protected and wherein the ring sleeve forms a cathode, the housing of the sealing arrangement is electrically conductively connected with the running sleeve via a current which bridges the gap space between the housing and the running sleeve. The current bridge may be a floating ring, a slip contact, electrically conductive sealing ring or a current conducting oil-water emulsion in the ring chamber. The system may operate with galvanic current or from an external power source.

Description

Cathodic corrosion-preventing device for sternshaft tube of ship
The present invention relates to the cathodic protection device on a kind of stern tube that is used for ship; on stern tube, be equipped with a tightness system; this tightness system is made up of with the one or more elastic rubber sealing rings that are connected with housing and cooperate with the axle sleeve of propeller shaft a metal shell that is fixed on the stern tube; in this tightness system; the block consumable anode that is exposed in the seawater is fixed on the member that will protect, and axle sleeve constitutes negative electrode.
In the cathodic protection device, the part that all will be protected as shell, rudder for ship, ship axle and axle sleeve, will be conducted electricity connection mutually, so just can make these parts become negative electrode, and produces the effect of electrochemical cell effect.
In the device (DE-OS 2520948) of the above-mentioned type, this requirement is not always can satisfy certainly, because the housing of tightness system with stern tube be carry out mechanical connection by an angle staple rather than be electrically connected because stern tube is not included in the above-mentioned cathod system.
Therefore, owing to do not flow into the seal casinghousing surface or flow into inadequately from the effusive protective current of consumable anode, seal casinghousing is actually with having no protection and is exposed in the seawater.People once attempted to eliminate this disadvantage by making housing with bronze or similar corrosion resistant material.Obviously, these material price costlinesses, therefore task of the present invention is to make the enough more cheap materials of seal casinghousing energy, makes as steel or grey cast iron, but also otherwise therefore must cause stronger corrosion.According to the present invention, the scheme of finishing this task is that the housing of the tightness system electric current bridge-set by the space between a cross-over connection housing and the axle sleeve is connected with the axle sleeve conduction.
By this measure, seal casinghousing also is included in the cathod system now, and thereby accepts the protection of consumable anode.According to form of implementation of the present invention, the electric current bridge-set can be designed to the form of the seal liner of float ring, contact terminal, conduction or the conductive oil water emulsion in ring cavity.
In addition, consumable anode can as usually, be installed on the annular lip, on the axle sleeve or on the seal casinghousing.Consumable anode is installed in the characteristic that this scheme on the seal casinghousing has made full use of cathode assembly, promptly mainly flows near the anode cathode assembly, so on seal casinghousing, formed better corrosion protection result from the effusive protective current of anode.
Taked some other form of implementation for this purpose; as consumable anode is constituted in such a way; make the size of mobile electric current between consumable anode and the housing that will protect should satisfy the safety precaution requirement, prolong the life-span of consumable anode again as much as possible.Therefore, can consider to reduce the active surface of consumable anode or between consumable anode and fixed surface, insert the liner of a partially conductive.
At last, device of the present invention can be considered to drive with galvanic current or foreign current, can corresponding therewith use zinc, aluminium or its alloy, or charcoal or platinum are as the material of consumable anode.
By synoptic diagram the present invention is described in more detail below.Wherein:
Fig. 1 is one and has an electric current bridge-set and a longitudinal section that is arranged on the tightness system of the consumable anode on the seal casinghousing,
Fig. 2 is one and has an electric current bridge-set and a longitudinal section that is arranged on the tightness system of the consumable anode on the axle sleeve.
In stern tube seal system illustrated in figures 1 and 2, axle sleeve 2,2.1 is on the axle 1, and axle 1 is bearing on the bearing shell that does not illustrate.This bearing shell is being supported by a tailing axle propeller boss 3, and seal casinghousing 4 also is fixed on this tailing axle propeller boss.Seal casinghousing 4 is clipped in two seal washers 5.1,5.2,5.3 between the housing ring respectively by 4.1,4.2,4.3,4.4 and 3 on the housing ring of 4 axial adjacent settings evenly and forms.Seal washer is designed to lip seal configuration, and wherein two towards seawater W, and one towards lubricant chamber S.Between two sealing lips, leave a ring cavity 6.1,6.2 respectively.In the embodiment shown in fig. 1, on the seal casinghousing 4 and also be it on the outside surface of seawater W, fixed one blocky, consumable anode 7.Be provided with 9, one float rings 8 of ring groove and be imported in the ring groove 9 in the housing ring 4.4 adjacent with lubricant chamber S, float ring 8 is enclosed within on the axle sleeve 2 with small gap and engages with an anti-rotation lock 10 that is fixed in the ring groove outside.This anti-twisting equipment plays contact member simultaneously, so that flow to float ring 8 from the electric current of housing ring 4.4.
In the embodiment shown in Figure 2, a blocky consumable anode 7 is fixed on the annular lip 2.1 of axle sleeve 2, and is to be fixed on the flange side of seal casinghousing 4.In this embodiment, in the housing ring 4.4 adjacent, be provided with a blind hole 12 with lubricant chamber S.Here, the electric current bridge-set is designed to the form of contactless ring sections 11, and its band radius clearance ground imports in the blind hole 12, and is pressed against on the outside surface of axle sleeve 2 by means of a spring 13, and at this, spring 13 plays contact member simultaneously.

Claims (9)

1, the cathodic protection device of the member on a kind of stern tube of ship; on stern tube, be equipped with a tightness system; this tightness system is made up of with the one or more elastic rubber sealing rings that are connected with housing and cooperate with the axle sleeve of propeller shaft a metal shell that is fixed on the stern tube; in this tightness system; the block consumable anode that is exposed in the seawater is fixed on the member that will protect; and axle sleeve constitutes negative electrode; wherein, the electric current bridge-set of the housing of tightness system by the space between cross-over connection housing and the axle sleeve conducts electricity with axle sleeve and is connected.
2, according to the device of claim 1, it is characterized in that, the electric current bridge-set is designed to float ring (8), it has axle sleeve (2) in arms with small spacer ring, and have the gap but can not import in the ring groove (9) in housing (4) with twisting, at this, anti-rotation lock (10) plays contact member simultaneously.
3, according to the device of claim 1, it is characterized in that, the electric bridge tipping is put and is contained a contactless ring sections (11) that is placed on slidably on the axle sleeve (2), this contactless ring sections has radius clearance ground and imports in the blind hole (12) of shell (4), and its contact surface is pressed against on the axle sleeve (2) by means of a spring (13), here, spring (13) plays contact member simultaneously.
According to the device of claim 1, it is characterized in that 4, the electric current bridge-set constitutes by the sealing-ring (5.1,5.2,5.3) of at least one conduction.
According to the device of claim 1, it is characterized in that 5, the electric current bridge-set charges the conducting medium water-oil emulsion of ratio (for example selected) and constitutes by being arranged at least one in the ring cavity (6.1,6.2) between the sealing-ring.
6, according to each the device in the claim 1 to 5, it is characterized in that consumable anode (7) is arranged on the housing (4), and be arranged on housing (4) on the outside surface of seawater.
7, according to each the device in the claim 1 to 5, it is characterized in that consumable anode (7) is arranged on the annular lip (2.1) of axle sleeve (2).
According to one of in the claim 1 to 7 device, it is characterized in that 8, axle sleeve (2.1) is an electrical isolation with axle (1) and propeller.
According to one of in the claim 1 to 8 device, it is characterized in that 9, consumable anode is by the zinc with enough protection electromotive force, aluminium or its alloy, or constitute that, device comes work with galvanic current or foreign current here by charcoal or platinum.
CN88109213A 1987-12-01 1988-12-01 Cathodic corrosion-preventing device for sternshaft tube of ship Expired CN1019206B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3740679A DE3740679C2 (en) 1987-12-01 1987-12-01 Device for cathodic corrosion protection of a component on a stern tube of a ship
DEP3740679.5 1987-12-01

Publications (2)

Publication Number Publication Date
CN1035141A CN1035141A (en) 1989-08-30
CN1019206B true CN1019206B (en) 1992-11-25

Family

ID=6341644

Family Applications (1)

Application Number Title Priority Date Filing Date
CN88109213A Expired CN1019206B (en) 1987-12-01 1988-12-01 Cathodic corrosion-preventing device for sternshaft tube of ship

Country Status (8)

Country Link
JP (1) JP2583792B2 (en)
KR (1) KR960011021B1 (en)
CN (1) CN1019206B (en)
AU (1) AU613122B2 (en)
DE (1) DE3740679C2 (en)
GB (1) GB2213165B (en)
NL (1) NL193321C (en)
SE (1) SE8804356L (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3930686A1 (en) * 1989-09-14 1991-03-28 Blohm Voss Ag Cathodic protection of ship parts - with sacrificial anode held in cage clamped between parts to avoid loosening of anode and possible disconnection
DE102014223064B4 (en) * 2014-11-12 2019-07-18 Aktiebolaget Skf Protective device for the stern tube seal of propeller-propelled ships
CN104775887A (en) * 2015-04-09 2015-07-15 上海天纳克排气系统有限公司 Exhausting system
CN106086900B (en) * 2016-07-19 2018-06-19 武汉理工大学 Ship impressed current cathodic protection system and its intelligent control method
WO2019131899A1 (en) * 2017-12-27 2019-07-04 Nok株式会社 Sealing device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1152620A (en) * 1956-02-28 1958-02-21 Condensation Application Mec Device for the protection against corrosion of submerged or buried metal surfaces
US3169504A (en) * 1963-12-16 1965-02-16 Wankesha Bearings Corp Cathodic system
NO129803B (en) * 1973-03-21 1974-05-27 Skarpenord As
JPS5116248A (en) * 1974-07-31 1976-02-09 Kobe Steel Ltd SENBIKANSHIIRUYORAINAANO DENKIBOSHOKUHO
JPS5819707B2 (en) * 1975-10-02 1983-04-19 電気化学工業株式会社 Niekigata Setuchiyakuzaisoseibutsu
JPS628238Y2 (en) * 1981-02-20 1987-02-25

Also Published As

Publication number Publication date
AU613122B2 (en) 1991-07-25
AU2646888A (en) 1989-06-01
DE3740679C2 (en) 1993-10-14
NL193321B (en) 1999-02-01
JP2583792B2 (en) 1997-02-19
GB2213165B (en) 1991-08-14
KR960011021B1 (en) 1996-08-16
GB8827843D0 (en) 1988-12-29
SE8804356D0 (en) 1988-12-01
JPH01195198A (en) 1989-08-07
SE8804356L (en) 1989-06-02
KR890010282A (en) 1989-08-07
GB2213165A (en) 1989-08-09
DE3740679A1 (en) 1989-06-15
NL8802940A (en) 1989-07-03
NL193321C (en) 1999-06-02
CN1035141A (en) 1989-08-30

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