CN214063784U - Sealing structure of full-rotation propulsion system - Google Patents

Abstract

The utility model discloses a seal structure of full gyration propulsion system, include: the thrust cover seal is characterized in that an O-shaped ring is additionally arranged at a lead angle between the bearing box and the thrust cover; the stern shaft seal comprises a static seal without relative motion and a shaft seal, the static seal without relative motion comprises a first 0-type sealing ring arranged between a bearing box and a rudder propeller body, a second O-type sealing ring arranged between a thrust cover and the bearing box, a plug bolt sealing gasket of the thrust cover, a rubber sealing gasket between a flow guide cap and the rudder propeller body, the shaft seal fastens an oil seal body on a stern pressure cover by using bolts, an oil seal shell comprises a sealing gasket, an anticorrosive lining, a check ring, a framework oil seal and an isolating ring, and the gap between the anticorrosive lining and the stern shaft is 0.10-0.15 mm. The utility model has the advantages that: the problem of installation of newly-manufactured stern axle because of the error brings can be solved.

Description

Sealing structure of full-rotation propulsion system

Technical Field

The utility model belongs to harbour wheel barge field especially relates to a seal structure of full-circle gyration propulsion system.

Background

The full-rotation propelling equipment is widely applied to large-power small-tonnage engineering ships with flexible operation. The import equipment is selected as the equipment used by most of the ship companies at present, and when the equipment is used for a long time, the problem of damage of parts can occur, and new parts need to be processed and manufactured for replacement. The new parts have certain machining errors and cannot be directly installed and used. Such as the propulsion system of model ZP-2A manufactured by the japan new iron services company, the apparatus is specifically composed as shown in fig. 1: the stern shaft 3 is respectively fixed on the body 6 by a tapered roller bearing 14, a thrust bearing 10, a stern gland and a thrust cap, the main machine power torque drives a vertical bevel gear 13 through a vertical shaft, and drives a transverse bevel gear 12 to rotate the stern shaft, so as to drive the propeller 2 to operate. The vertical bevel gear 13 and the horizontal bevel gear 12 are main components for transmitting the power of the whole ship, and the parameters of meshing clearance between the vertical bevel gear and the horizontal bevel gear are very necessary to ensure.

The thrust of the ship finally acts on the thrust cover 8 through the thrust bearing 10 and then is transmitted to the rudder propeller body through the thrust cover to realize the propulsion of the ship, so the thrust cover is one of very important components of the ship.

In addition, when the screw shaft is installed, the installation clearance is particularly important, and the oil leakage phenomenon can not occur.

Disclosure of Invention

The utility model aims to solve the technical problem that a seal structure of full gyration propulsion system is provided, the installation problem that the stern axle that can solve newly-made brought because of the error.

In order to solve the technical problem, the utility model discloses a technical scheme is: a seal configuration for a full-swing propulsion system, comprising: the thrust cover seal is characterized in that an O-shaped ring is additionally arranged at a lead angle between the bearing box and the thrust cover; the stern shaft seal comprises a static seal without relative motion and a shaft seal, the static seal without relative motion comprises a first 0-type seal ring arranged between a bearing box and a rudder propeller body, a second O-type seal ring arranged between a thrust cover and the bearing box, a plug bolt seal gasket of the thrust cover, a rubber seal gasket between a flow guide cap and the rudder propeller body, the shaft seal fastens the oil seal body on a stern pressure cover by using bolts, the oil seal shell comprises a seal gasket, an anticorrosive lining, a check ring, a framework oil seal and an isolating ring, and the gap between the anticorrosive lining and the stern shaft is 0.10-0.15 mm.

The plug bolt sealing gasket is a copper gasket or a steel gasket.

The utility model has the advantages that: the thickness of the gasket is adjusted by selecting a copper or steel gasket, so that the sealing effect of the thrust cover is good; after the stern shaft is provided with the copper adjusting washer for the thrust cover through the O-shaped ring, lubricating oil does not leak from the back of the copper washer; the gap between the anticorrosive lining and the stern shaft is controlled to prevent the oil seal from being abraded due to the fact that the anticorrosive lining and the stern shaft are not concentric in operation.

Drawings

FIG. 1 is a schematic view of a sealing structure of a full-circle rotary propulsion system according to the present invention;

fig. 2 is a schematic view of the thrust end static seal ring of the present invention;

fig. 3 is a schematic view of the stern shaft seal of the present invention.

In the figure:

1. lock nut 2, propeller 3, ship shaft

4. Ship shaft seal 5 ship gland 6 body

7. Bearing box 8, thrust cover 8-1, first O-shaped ring

8-2, 8-3, 8-4 and 8-4 parts of second O-shaped ring and first copper gasket

8-5 parts of second copper gasket 8-6 parts of sealing ring 9 parts of flow guide cap

10. Thrust bearing 11, bearing 12, horizontal bevel gear

13. Vertical umbrella type gear 14, tapered roller bearing 15, oil seal housing

15-1 of sealing gasket 15-2 of anticorrosive lining 15-3 of retainer ring

15-4. framework oil seal 15-5. isolating ring

Detailed Description

The invention will be described in further detail with reference to the following drawings and embodiments:

1-3, a seal structure for a full-swing propulsion system, comprising: thrust cover sealing and stern shaft sealing.

The thrust of the ship finally acts on the thrust cover 8 through the thrust bearing 10 and then is transmitted to the rudder propeller body through the thrust cover to realize the propulsion of the ship, so the thrust cover is one of very important components of the ship. Turning of any end faces is prohibited when adjusting the clearance. Otherwise, the thrust of the ship needs to be recalculated, and the ship cannot run at full load. Therefore, the adjustment of the thrust cover can only be performed by a shimming method. At least four or more than 1 mm-thick gaskets are arranged on the connecting bolt of the thrust cover 8 and the bearing box 7 or more than four 1mm feelers are uniformly distributed according to the circumference to tighten the bolt. The clearance between the thrust cover and the bolt is 1mm at this time. And applying an external force F2, wherein F2 is larger than F1, slowly moving the shaft to the right, and recording the reading C of the dial indicator, wherein the reading C is the rightward displacement of the screw shaft.

And calculating an axial clearance value CL, and when the sigma is less than 0 and the CL is far beyond a specified range, adding an adjusting gasket with the thickness sigma thick at the outer edge of the thrust cover. The gasket not only has the function of adjusting the clearance, but also has the function of sealing, so a copper gasket is selected; if sigma is more than 0 and far exceeds the specified range, the axial clearance of the stern shaft is over large, and a gasket with the thickness of sigma is added at the back of the outer ring of the thrust bearing. Because the copper pad can produce deformation when the pressurized, and make the clearance enlarge because of the thrust increases in the use admittedly, so this packing ring should adopt the steel packing ring.

The sealing of the stern shaft is a key link for ensuring the sealing performance of the stern shaft to finish the installation engineering of the stern shaft. The tightness of the entire Z-drive system determines the quality of lubrication of the equipment. The entry of seawater into the lubricant system emulsifies the lubricant. Oil leakage can cause contamination.

The first 0-shaped ring is a sealing ring between the bearing box 7 and the rudder propeller body 6; the second O-shaped ring is a sealing ring between the thrust cover 8 and the bearing box 7; the third O-shaped ring 3 is a sealing ring which is added for ensuring that lubricating oil does not leak from the back of the copper gasket after the thrust cover is added with a copper adjusting gasket, and the size of the sealing ring is determined according to the size of a guide angle of the bearing box 7; the copper gasket 4 is a screwed plug bolt sealing gasket of the thrust cover 7, and besides copper gasket sealing, thread sealing glue is added at the thread; the copper gasket 5 is a sealing gasket for fixing the bolt of the diversion cap, and is sealed by high-grade cement after being sufficiently fastened, so that the bolt is not corroded by seawater, and the surface of the diversion cap is smooth, so that the ship resistance is reduced; the sealing gasket 6 is a rubber sealing gasket between the flow guide cap and the rudder propeller body, and once careless leakage occurs in a certain sealing link, the lubricating oil leaks into the flow guide cap, so that the sealing of the flow guide cap is a final barrier for the static sealing of the rudder propeller.

The shaft seal is dynamic seal of relative friction motion, and the oil seal housing 15 is fastened on the stern gland 5 by bolts. Four framework oil seals 15-4 and two isolating rings 15-5 are respectively arranged in the shell, wherein the two framework oil seals facing the direction of the rudder propeller body 6 are separated by the isolating rings and are used for sealing lubricating oil in the rudder propeller; the two pieces mounted away from the body 6 are also separated by a spacer ring 15-5 to seal against ingress of seawater. The anti-corrosion bushing 15-2 is fastened on the propeller hub by bolts, and the sealing gasket 1 is used for sealing lubricating oil leaked from a gap between the anti-corrosion bushing and the screw shaft. The gap between the anti-corrosion bushing 15-2 and the stern shaft must be measured due to machining errors in the new stern shaft. Generally, the thickness is controlled within 0.10-0.15 mm. Too large clearance can lead to the fact with the stern shaft decentraction in operation and aggravate the wearing and tearing of oil blanket, and the lubricating oil in the body can't get into the space realization countershaft and cover of anticorrosive bush and axle then undersize and realize the cooling of countershaft and cover.

Claims (2)

1. A seal configuration for a full-swing propulsion system, comprising: thrust lid is sealed, the stern shaft is sealed, characterized by: the thrust cover sealing is realized by additionally arranging an O-shaped ring at a guide angle between the bearing box (7) and the thrust cover (8); the stern shaft seal comprises a static seal without relative motion and a shaft seal, the static seal without relative motion comprises a first 0-type seal ring arranged between a bearing box (7) and a rudder propeller body, a second O-type seal ring arranged between a thrust cover (8) and the bearing box (7), a plug bolt seal gasket of the thrust cover (8), a rubber seal gasket between a guide cap (9) and the rudder propeller body, the shaft seal is used for fastening an oil seal shell (15) on a stern gland (5) by using bolts, the oil seal shell (15) comprises a seal gasket (15-1), an anti-corrosion bushing (15-2), a check ring (15-3), a framework oil seal (15-4) and an isolating ring (15-5), and the gap between the anti-corrosion bushing (15-2) and the stern shaft is 0.10-0.15 mm.

2. A seal arrangement for a full-swing propulsion system according to claim 1, wherein: the plug bolt sealing gasket is a copper gasket or a steel gasket.

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