CN202032005U - Disc-type coupling for large low-speed marine diesel engine - Google Patents

Abstract

The utility model discloses a disc-type coupling for a large low-speed marine diesel engine. The disc-type coupling is provided with a front disc and a rear disc and is characterized in that the front and the rear discs (1, 2) are combined, and a screw hole (3) is arranged on the disc surfaces of the two discs respectively. The special disc design replaces the H-type coupling structure used in the domestic and aboard trial run experiments of marine diesel engines for decades. The disc-type coupling adopts a disc-type design which is simple in structure, so that the contour volume is greatly reduced, the length of the disc-type coupling is only 15-20% of the H-type coupling structure, so that the service length of a test bench is effectively increased, and the space is also saved. As the contour volume and the weight are greatly reduced, and cast steel blank is adopted, special large forging equipment and transportation expenses are not needed, and the manufacturing cost of products is greatly reduced.

Description

Large-sized low-speed marine diesel engine disc type shaft joint

Technical field:

The present invention relates to a kind of shaft joint, be used for the large-sized low-speed marine diesel engine when testbed trial, being rigidly connected of the bent axle of marine diesel engine and water conservancy dynamometer.

Background technique:

Domestic and international each large-sized low-speed marine diesel engine manufactory, at diesel engine during at testbed trial, being rigidly connected of bent axle and water conservancy dynamometer, generally adopt the shaft coupling (being commonly called as minor axis or transmission shaft) of H type, utilize bolt to carry out rigidly connected mode, thereby reach the power that marine diesel engine is sent, be delivered to the function of water conservancy dynamometer, make dynamometer test the power that the marine diesel engine instantaneous time is sent exactly.The shaft coupling of H type adopts the section steel to make usually, and its structure is an intrinsic disk in two ends.The technical vulnerability of the shaft coupling of H type and deficiency are to forge the cost height, the forging of the shaft coupling of H type, and the forging equipment that needs is huge, the mechanical processing technique complexity; Simultaneously, its overall volume is big, will occupy the test stand space of 1-1.5m usually, and often at a test factory building, in the time of need installing, test 3-4 platform diesel engine simultaneously, the limited test stand that makes just uses length to reduce 3-4m.Like this, the position of placing 3-4 platform marine diesel engine is just extremely narrow, even has to reduce to the 2-3 platform.

Summary of the invention:

The present invention is directed to the above-mentioned deficiency of prior art, a kind of simple in structure, with low cost, large-sized low-speed marine diesel engine disc type shaft joint that volume is short and small is provided.

Technical solution of the present invention is: large-sized low-speed marine diesel engine disc type shaft joint, be provided with former and later two disks, and former and later two disks combine, and the card of two disks is respectively equipped with screw.

The disc like design of uniqueness of the present invention, when having replaced domestic and international marine diesel engine test run test, the H type shaft coupling structure of utilization recent decades.Disc like design simple in structure greatly reduces overall volume, and length only is H type shaft coupling structure 15-20%, and the use length of test stand is effectively increased, and has saved the space.Because overall volume and weight greatly reduce, adopt the cast steel blank, do not need the large-sized forging equipment and the freight of specialty, reduced the manufacture cost of product significantly.

Description of drawings:

Fig. 1 is a structural representation of the present invention.

Fig. 2 is user mode figure of the present invention.

Embodiment:

Further specify embodiments of the invention below in conjunction with accompanying drawing:

As shown in Figure 1, 2, large-sized low-speed marine diesel engine disc type shaft joint adopts the cast steel manufacturing, be provided with former and later two disks, former and later two disks the 1, the 2nd combine, and integral body is ladder-type, the card of two disks is respectively equipped with screw 3, and the screw diameter of thread is M42-M140.The outside diameter of preceding disk 1 and the flange of crankshaft output end 4 size are consistent, are 1800mm; The flange size of the outside diameter of rear disk 2 and water conservancy dynamometer input end 5 is consistent, is 800mm.Bent axle, plate-like coupling, water conservancy dynamometer three's connection adopts double-screw bolt to connect.

Claims (1)

1. a large-sized low-speed marine diesel engine disc type shaft joint is provided with former and later two disks, it is characterized in that: former and later two disks (1,2) combine, and the card of two disks is respectively equipped with screw (3).

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