CN2080592U

CN2080592U - Pneumatic backflow end face tail shaft seal

Info

Publication number: CN2080592U
Application number: CN 90217131
Authority: CN
Inventors: 高绍纪
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-07-27
Filing date: 1990-07-27
Publication date: 1991-07-10

Abstract

The pneumatic backflow end face tail shaft seal is a problem in the aspect of engineering machinery technology, and is aimed at solving the problems of continuous service life of ship tail shaft water and oil seal and marine pollution. The friction surface pressing force between the movable ring and the static ring is exerted by pressure gas through the pneumatic tire, the required pressure can be randomly adjusted at any time, the pressure intensity can be ensured to be equal everywhere, and the inner hole of the tail bearing is provided with a special oil groove, so that the lubricating oil is effectively prevented from leaking. It is suitable for tail shaft water seal and oil seal. Can be installed in a new ship for construction, and can also conveniently refit various tail shaft water seals and oil seals of the existing ships.

Description

Gas-pressure backflow end surface tail shaft seal

Pneumatic-typed backflow end face tail stalk seal belongs to mechanical engineering technology aspect problem, and this project is applicable to the water seal and the oil sealing of marine rear shaft.

Our times, marine rear shaft water seal adopt the sealing of stuffing box formula more; Normal the having of adopting of marine rear shaft oil sealing: front end is a stuffing box formula and the rear end is metal ring labyrinth sealing, lip formula rubber tail stalk seal, spring end face tail stalk seal, rubber cartridge type end face tail stalk seal.At present domestic and international used all tailing axle water seals, oil-sealing arrangement in use all has unsatisfactory part.

The water seal of stuffing box formula, oil sealing, relatively simple for structure, go rotten but filler is apt to deteriorate, the sealing axle journal initial line that weares and teares easily, continuously working life short, lip formula rubber tail stalk seal, the easy aging cracking of lip rubber.Japan oil sealing industrial group has done a large amount of tests and the investigation of real ship from 73 years, but can not get the effective measures that solve this technical problem in order to solve this technical problem in the period of 82.I have also made to inquire into for many years And to this class sealing and done nearly 8 years test on many ship, aging cracking problem to lip rubber, obtained breakthrough, the abrasion problem of stuffing box gland, also in nearest repacking, address, the end face tail stalk seal, technological requirement is very strict, working life is not long continuously, many springs end face tail stalk seal of company's ship is eaten out in Zhanjiang, belong to the patented product of certain state originally, because of moving, wearing and tearing of stationary ring rubbing surface and spring force inefficacy etc., want frequent docking adjustment, repairing quality is difficult to guarantee, 1912 kilowatts of tugboats of be contained in the end face tail stalk seal of the home rubber cartridge type on the, often because of the leakage of oil docking, and repair and be difficult to reach quality requirement, obtained the single spring end face tail stalk seal of certain factory's self design of " China 85101501 " number of patent application in 85 years, assembly technology is strict, be difficult to guarantee moving, stationary ring rubbing surface isostasy, in addition, for lubricant oil can automatic cycle, at tail bearing endoporus garden Zhou Shangkai helical oil groove, destroyed the formation of bearing film and reduced the bearing area of bearing.The Certain Navy Yard base entrusted this factory to reequip the tailing axle oil sealing of two towboats in 89 years, repacking is not really desirable, in test, because water inlet or leakage of oil, two ships have all been gone up three rows again and have been done over again, as the rubber of rotating ring, because of area of contact excessive, lubricating condition is relatively poor, can very fast generation wear out, and As time goes on the impacting force of spring also can diminish.

Research purpose of the present utility model is that conception solves boats and ships in its whole operation life span, because the failure problems docking of tailing axle water seal, oil sealing lacks docking in other words, does not increase the operation phase, saves repairing cost of the ship, prevents marine pollution.

The utility model is simple in structure, boundary dimension is little, mounting process is less demanding, rotating ring that seals and stationary ring all adopt to have self-enrichment, wear resistant corrosion resistant, non-ageing special material and makes, these materials are compared with the material that existing tailing axle water seal, oil sealing are used always, be the minimum materials of abrasion, the abrasion of rotating ring material are below 1/30 of chrome faced Alloy Constructional Steel, and the abrasion of static ring material are below 1/4 of Cuprum alloy.The power that overlays of rubbing surface is granted by pneumatic tyre by pressed gas between dynamic and static ring.As shown in Figure 1, cut down part by pressure gas source through relevant, enter the supporting base and the pneumatic tyre of stationary ring, pneumatic tyre is granted stationary ring with gas pressure and is pressed to rotating ring.Shaft bearing design near tail stalk seal has special oil groove, as shown in Figure 2, brearing bore has many semiclosed helical oil grooves, do not drive oil groove in 120 ° of scopes of bearing bottom, only drive helical oil groove in the 240 ° of scopes in top, right spindle is a right-hand screw, and each helical oil groove of the left side does not communicate, the end of each helical oil groove of the right links to each other with the oil groove of parallel axes by one, makes oil return unimpeded.This tank structure neither destroys the formation of bearing film, has the effect of pump oil back again, makes the oil pressure in space in the stationary ring be in negative pressure or 0, prevents that effectively lubricant oil from leaking, and guarantees not to marine pollution.

The utility model is compared with existing all kinds of tail stalk seals, and technical have following characteristics:

1, need not do any adjustment, the pressure that just can guarantee dynamic and static interannular rubbing surface equates, spring be difficult to do with the end face tail stalk seal rubber cartridge type obtain empirical evidence: the pressure that acts on dynamic and static interannular rubbing surface does not wait, and is the major reason that causes the leakage of oil of end face tail stalk seal.

2, can adjust the required pressure of dynamic and static interannular rubbing surface at any time, needn't the docking adjustment.Spring do not possess this characteristic with the end face tail stalk seal rubber cartridge type.

3, the material that dynamic and static ring adopted, its wear-resisting property are that present tail stalk seal material commonly used can't be compared.

4, the tail bearing bore design has special oil groove, and this oil groove structure can not destroy the formation of bearing film, has the effect of pump oil back, that is the backflow effect, and this effect makes the oil pressure in space in the stationary ring be in negative pressure or 0.Prevent that effectively lubricant oil from leaking, guarantee not to marine pollution.

Selection of the present utility model and structural feature thereof have the performance of super-long-term use and prevent lubricated leaking effectively.It not only is applicable to new ship construction, also easily all kinds of tailing axle water seals of existing ship, oil-sealing arrangement is reequiped simultaneously.

Description of drawings:

Fig. 1 is a pneumatic-typed backflow end face tail stalk seal first half sketch of longitudinal section;

Fig. 2 is a right-hand rotation tailing axle rear bearing sketch of longitudinal section;

Fig. 3 is a right-hand rotation tailing axle rear bearing cross section sketch.

Below the accompanying drawing illustrated embodiment is done an explanation.

Among Fig. 1, part 1 is a sealing seat, and part 2 is pneumatic tyres, and part 3 is stationary rings, and part 4 is rotating rings, and part 5 is rotating seats, and part 6 is O shape cushion rubbers, and part 7 is tailing axles, and gas meter shows that pressed gas flows to.Sealing seat is fixed by bolts on the stern tube ear end face; The pneumatic tyre both ends of the surface stick with glue agent knot, end face and sealing seat annular groove bottom surface bonding, and another end face and stationary ring annular groove bottom surface bond; The stationary ring cylindrical is driven a cannelure, and cannelure matches with feather key on being loaded on sealing seat, and stationary ring can only vertically move, and can not rotate; Rotating ring uses bolt in the recessed shoulder of rotating seat; Rotating seat is loaded on the propeller end face with bolt.

Among Fig. 2, part 1 is the tailing axle rear bearing, and part 2 is tailing axles, and oil meter shows that oil return flows to.In 240 ° of scopes of shaft bearing hole upper semi-circle,, leave the certain distance of bearing face at the tail stalk seal end, have many helical oil grooves, the end on each bar helical oil groove the right is connected with a vertical oil groove, and this oil groove is not open-minded in tailing axle oil sealing direction, and open-minded at other direction; Vertical oil groove is not driven on the bearing hole left side.The tailing axle axle journal is a naked body.

Among Fig. 3, part 1 is the tailing axle rear bearing, and part 2 is that tailing axle, n represent the tailing axle sense of rotation.Its structural feature is ditto described.

Claims

Pneumatic-typed backflow end face tail stalk seal comprises pneumatic tyre, rotating ring, stationary ring and oil groove, it is characterized in that, wherein between sealing seat and stationary ring, be provided with pneumatic tyre, be used to guarantee the power that overlays between dynamic and static ring rubbing surface, the upper semi-circle place has many semiclosed helical oil grooves in tailing axle rear bearing hole, be the semicircle claw type, and only open in the 240 ° of scopes in the top of tail bearing.