CN220660786U - Temporary support tool for mounting of ultra-long shafting stern shaft - Google Patents

Abstract

The utility model provides a temporary support tool for mounting an ultra-long shafting stern shaft, which comprises a plurality of welding thread bases, a plurality of temporary support bolts, a plurality of Teflon cushion blocks, a plurality of plugs and a plurality of protective covers, wherein a plurality of groups of through holes which are in groups are formed in the side wall of the lower part of a stern tube, the welding thread bases are welded with the side wall of the through holes in groups of intervals, the Teflon cushion blocks are respectively connected with one end of one temporary support bolt before the stern shaft is mounted, each temporary support bolt is in threaded connection with one welding thread base, and the Teflon cushion blocks are positioned in the stern tube; after the stern shaft is installed, the temporary supporting bolts and the Teflon cushion blocks are taken down, a plug is screwed into each welding thread base, and the outer side end of each welding thread base is welded and connected with a protective cover. The temporary support tool for mounting the ultra-long shafting stern shaft avoids the use of a dummy shaft, ensures the safety of the stern shaft entering a cabin in the stern tube section, and accelerates the shafting penetration process.

Description

Temporary support tool for mounting of ultra-long shafting stern shaft

Technical Field

The utility model belongs to the technical field of ship manufacturing, and particularly relates to a temporary support tool for mounting an ultra-long shafting stern shaft.

Background

The ship transmission shaft is generally longer, because the larger the ship is, the larger the torque the transmission shaft receives when the main engine is started and stopped, and in order to compensate the elastic deformation of the transmission shaft, the shafting is generally lengthened, and meanwhile, the ship performance consideration is considered. The design of the ultra-long transmission shafting is widely applied to the roll-on-roll ship, and a stern tube matched with the ultra-long shafting is relatively longer. It is known that the construction space in the stern tube is relatively narrow, and the cable tube and the lubricating oil tube of the stern bearing temperature sensor are arranged on the inner wall of the stern tube, so that the collision between the lubricating oil tube and the cable tube is easily caused in the stern shaft entering process due to protection or improper construction, and the tightness is influenced. Therefore, in the process of installing the long shafting stern shaft, a dummy shaft installation scheme is considered, so that the dummy shaft is connected with the front end face of the stern shaft; meanwhile, in the process of entering the stern shaft, the gap between the stern shaft and the stern tube is continuously and visually observed, and the height of the dummy shaft is adjusted at any time so as to avoid collision between the stern shaft and the components in the stern tube, thereby being time-consuming and labor-consuming.

Disclosure of Invention

Aiming at the problems, the utility model provides a temporary support tool for mounting a stern shaft of an ultra-long shafting, which is characterized in that temporary support points are added on a stern tube to avoid the use of a dummy shaft, so that the stern shaft can lie on the support points and pass through the stern tube, collision between the stern shaft and an inner part of the stern tube caused by middle arch of the degree of winding and sinking of a free end of the long stern shaft is avoided, the safety of a stern shaft inlet cabin in the stern tube section is ensured, and the shaft system penetration process is accelerated; meanwhile, in ship docking maintenance, the residual lubricating oil in the stern tube is conveniently and cleanly discharged by opening the cock at the bottom of the stern tube.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the temporary support tooling for the installation of the ultra-long shafting stern shaft comprises a plurality of welding thread bases, a plurality of temporary support bolts, a plurality of Teflon cushion blocks, a plurality of plugs and a plurality of protective covers, wherein a plurality of groups of through holes which are two by two are formed in one group are formed in the side wall of the lower part of a stern tube, the welding thread bases are two by two in one group and are in interval welding connection with the side wall of the through hole, the Teflon cushion blocks are respectively connected with one end of one temporary support bolt before the installation of the stern shaft, each temporary support bolt is in threaded connection with one welding thread base, and the Teflon cushion blocks are positioned in the stern tube; after the stern shaft is installed, the temporary supporting bolts and the Teflon cushion blocks are taken down, a plug is screwed into each welding thread base, and the outer side end of each welding thread base is welded and connected with a protective cover.

Further, the included angle between each group of welding thread bases is 70 degrees.

Further, the end face, far away from the temporary support bolt, of the Teflon cushion block is an arc-shaped end face, and the diameter of the arc-shaped end face is the same as that of the stern shaft.

Further, the bottom of the Teflon cushion block is provided with external threads, the inside of the temporary support bolt is provided with internal threads, and the Teflon cushion block is in threaded connection with the temporary support bolt.

Further, the Teflon cushion block is in a grease filling type. Before entering the stern shaft, grease is smeared on the surface of a Teflon cushion block in advance, so that the stern shaft can be lubricated and pushed into a stern tube on the surface of the Teflon cushion block, and the temporary support bolts and the Teflon cushion block assembly are required to be removed integrally during the process, so that the grease is smeared on the surface of the Teflon cushion block continuously. The side surface of the temporary support bolt and the center of the Teflon cushion block can be drilled, grease can be continuously filled into the surface of the Teflon cushion block through a hand pump and a filling oil tank, and the time for filling grease into the temporary support bolt and the Teflon cushion block assembly in the process of disassembling and assembling is shortened, as shown in fig. 3.

The temporary support tool for mounting the stern shaft of the ultra-long shafting is suitable for the design area of the ultra-long shafting and the long stern tube. These areas are narrow in construction area, difficult for personnel to enter, difficult for dummy shaft installation and time consuming to drag. Through the temporary supporting point design on the stern tube, the safety coefficient in the stern shaft installation is improved, the shafting installation is accelerated, the false shaft installation and use cost is avoided, and the shafting installation labor is saved. Through the design of the cock at the bottom of the stern tube, the lubricating oil in the stern tube can be replaced conveniently and rapidly in the process of maintaining the ship in the dock, and the economical efficiency of the operation and maintenance of the ship is improved.

Drawings

FIG. 1 is a front view of a temporary support tool for mounting an ultra-long shafting stern shaft in a use state;

FIG. 2 is a view in the direction A-A of FIG. 1;

fig. 3 is a schematic illustration of grease filling of a teflon spacer assembly.

Wherein, the device comprises a 1-single arm support bearing, a 2-single arm support, a 3-floating sleeve, a 4-stern shaft and a 5-stern tube; 6-stern post; 7-front bearings; 8-front sealing; 9-an oil pipe; 10-welding a thread seat; 11-temporary support bolts; 12-Teflon cushion block; 13-plugs; 14-protecting cover; 15-an oil filling tank; 16-a filling line; 17-hand pump.

Description of the embodiments

The utility model will be further described with reference to the accompanying drawings and specific examples.

As shown in fig. 1-2, the temporary support tooling for mounting the stern shaft of the ultra-long shafting comprises a plurality of welding thread bases 10, a plurality of temporary support bolts 11, a plurality of teflon cushion blocks 12, a plurality of plugs 13 and a plurality of protective covers 14, wherein a plurality of groups of through holes which are two by two are formed in one group are formed in the side wall of the lower part of the stern tube 5, the welding thread bases 10 are welded with the side wall of the through hole in one group by two at intervals, and an included angle between each group of welding thread bases 10 is 70 degrees; before the stern shaft 4 is installed, a plurality of Teflon cushion blocks 12 are respectively connected with one end of a temporary supporting bolt 11, each temporary supporting bolt 11 is in threaded connection with a welding thread base 10, the Teflon cushion blocks 12 are positioned in the stern tube 5, the end faces of the Teflon cushion blocks 12, which are far away from the temporary supporting bolts 11, are arc-shaped end faces, and the diameters of the arc-shaped end faces are the same as the diameters of the stern shaft 4; after the stern shaft 4 is installed, the temporary support bolts 11 and the Teflon cushion blocks 12 are removed, a plug 13 is screwed into each welding thread base 10, and the outer side end of each welding thread base 10 is welded with a protective cover 14.

The bottom of the Teflon cushion block 12 is designed into external threads, the inside of the temporary support bolt 11 is designed into internal threads, and the Teflon cushion block 12 is screwed on the temporary support bolt 11 for fixation; the teflon spacer 12 is of the grease filled type.

The temporary support bolts 11 and the teflon spacer blocks 12 are assembled and screwed into the welding screw seats 10, and simultaneously the teflon spacer blocks 12 are smeared with lubricating grease for lubrication when entering the stern shaft 4. The stern shaft 4 is pushed into the stern tube 5 through the single arm support bearing 1, the single arm support 2 and the floating sleeve 3 and is positioned on the temporary support bolt 11. The constructor climbs into the stern tube 5 through the front bearing 7 to observe the condition that the stern shaft 4 falls to the temporary supporting bolt 11 and the clearance condition between the stern shaft 4 and the peripheral stern tube 5 and the clearance condition between the stern shaft 4 and the slide oil tube 9, and the height of the stern shaft 4 can be adjusted by rotating the bottom of the temporary supporting bolt 11 if required, so that collision in the process of entering the shaft is avoided.

After passing through the stern tube 5, the stern post 6 and the front bearing 7, the temporary support bolts 11 and the Teflon cushion blocks 12 are unscrewed and removed, and the stern shaft 4 is well protected as a shaft disassembly spare part for later maintenance. The plug 13 is screwed into the welding thread seat 10, and meanwhile, the protective cover 14 is welded outside the welding thread seat 10, so that the risk of leakage of sliding oil from a gap between the plug 13 and the welding thread seat 10 is avoided, and the VGP environment-friendly requirement is met.

Meanwhile, in the later operation period, for example, when a ship is docked and shafting shaft dismounting engineering is needed, the protective cover 14 is required to be split, the plug 13 is screwed off, the temporary support bolt 11 and the Teflon cushion block 12 are reset, support is provided for the stern shaft 4, and the shaft is safely and rapidly pulled out.

The teflon cushion block 12 can be designed into a grease filling type, so that grease filling is conveniently carried out on the contact surface through an oil gun in the process of entering the stern shaft 4.

Before entering the stern shaft 4, grease is smeared on the surface of the Teflon cushion block 12 in advance, so that the stern shaft 4 can be lubricated and pushed into a stern tube on the surface of the Teflon cushion block 12, the temporary support bolts 11 and the Teflon cushion block 12 assembly are required to be removed integrally during the process, and the surface of the Teflon cushion block 12 is smeared with the grease continuously. The side of the temporary support bolt 11 and the center of the Teflon cushion block 12 can be drilled, grease can be continuously filled into the surface of the Teflon cushion block 12 through the hand pump 17 and the oil filling box 15 and the filling pipeline 16, so that the time for filling the grease into the assembly of the temporary support bolt 11 and the Teflon cushion block 12 is shortened.

Those of ordinary skill in the art will appreciate that: the foregoing description of the embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (5)

1. The temporary support tooling for the installation of the ultra-long shafting stern shaft is characterized by comprising a plurality of welding thread bases, a plurality of temporary support bolts, a plurality of Teflon cushion blocks, a plurality of plugs and a plurality of protective covers, wherein a plurality of groups of through holes which are in groups are formed in the side wall of the lower part of a stern tube, the welding thread bases are in welded connection with the side wall of the through hole in groups of intervals, the Teflon cushion blocks are respectively connected with one end of one temporary support bolt before the installation of the stern shaft, each temporary support bolt is in threaded connection with one welding thread base, and the Teflon cushion blocks are positioned in the stern tube; after the stern shaft is installed, the temporary supporting bolts and the Teflon cushion blocks are taken down, a plug is screwed into each welding thread base, and the outer side end of each welding thread base is welded and connected with a protective cover.

2. The temporary support tooling for installing an ultra-long shafting stern shaft of claim 1 wherein the included angle between each set of welded screw bases is 70 °.

3. The temporary support tool for installing the stern shaft of the ultra-long shafting, according to claim 1, wherein the end face, far away from the temporary support bolt, of the Teflon cushion block is an arc-shaped end face, and the diameter of the arc-shaped end face is the same as that of the stern shaft.

4. The temporary support tool for installing the ultra-long shafting stern shaft according to claim 1, wherein external threads are arranged at the bottom of the Teflon cushion block, internal threads are arranged in the temporary support bolt, and the Teflon cushion block is in threaded connection with the temporary support bolt.

5. The temporary support tool for installing an ultra-long shafting stern shaft of claim 1 wherein the teflon spacer is of a grease filling type.