CN110653754A

CN110653754A - A assembly and disassembly tools for large-scale marine diesel piston ring

Info

Publication number: CN110653754A
Application number: CN201910997380.3A
Authority: CN
Inventors: 马龙斌; 朱正金; 罗茂林; 方圣琦; 董强
Original assignee: CSSC MES Diesel Co Ltd
Current assignee: CSSC MES Diesel Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-01-07

Abstract

A disassembly and assembly tool for a large marine diesel engine piston ring comprises a handheld part, a fixed structure part and a moving structure part; the hand-held part is fixedly connected to the middle part of the fixed structural part, and the moving structural part is connected to the fixed structural part and can move outwards or inwards leftwards and rightwards along the fixed structural part, so that the piston ring is expanded, and the piston ring is assembled and disassembled. The invention can meet the dismounting of piston rings without dimension, can not damage the piston rings, the pistons and the like, has the advantages of stable transmission, high safety and reliable performance, and achieves the effects of convenient management, strong universality, convenient operation and cost reduction.

Description

A assembly and disassembly tools for large-scale marine diesel piston ring

Technical Field

The invention relates to auxiliary process equipment for parts of a large marine diesel engine, in particular to a disassembling tool for a piston ring of the large marine diesel engine, and belongs to the technical field of manufacturing of marine diesel engines.

Background

The structure of the diesel engine can not be separated from a piston ring in both a large marine low-speed diesel engine and a small agricultural diesel engine. The piston ring is installed in the annular of piston, constitutes the combustion chamber jointly with piston, cylinder jacket and cylinder cap, and its main function avoids direct contact wearing and tearing between piston and the cylinder jacket, reduces the gas leakage to give the cylinder jacket with the heat transfer of piston head portion.

The piston ring is an unclosed metal ring with certain elasticity, and 3-4 piston rings are generally arranged on each piston of a large-scale low-speed diesel engine. The working environment of the piston ring is very severe and is easy to corrode at high temperature, and the piston ring belongs to a vulnerable part, so that the piston ring needs to be detached, checked or replaced at regular intervals. However, when the piston ring of the large-sized low-speed diesel engine is disassembled and assembled, manual forced disassembly and assembly or a special disassembling tool is generally adopted at present, and the two modes are inconvenient, unsafe or strong in specificity in disassembly and assembly; the piston rings with different sizes are assembled and disassembled by using special tools, so that the use and management are inconvenient, and some piston rings and pistons are even damaged.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provide the disassembling tool for the piston ring of the large marine diesel engine, and the same disassembling tool can be used for piston rings with different cylinder diameters, so that the effects of convenient management, strong universality, convenient operation and cost reduction are achieved.

Based on the above purpose, the technical scheme provided by the invention is as follows:

a disassembly and assembly tool for a large marine diesel engine piston ring comprises a handheld part, a fixed structure part and a moving structure part; the hand-held part is fixedly connected to the middle part of the fixed structural part, and the moving structural part is connected to the fixed structural part and can move outwards or inwards leftwards and rightwards along the fixed structural part, so that the piston ring is expanded, and the piston ring is assembled and disassembled.

As a further improvement, the fixed structural component comprises a sliding rod and two end plates; the upper portion and the lower portion of the end plate are respectively provided with an upper connecting hole and a lower connecting hole, the two end plates are arranged in a bilateral symmetry mode, two ends of the sliding rod respectively penetrate into the lower connecting holes of the two end plates, and the sliding rod is fixedly connected between the two end blocks through the hexagon socket head cap screws.

As a further improvement, the hand-held component comprises a handle ball, a handle and a handle end clamping block; the upper end and the lower end of the handle are respectively connected and fixed with the handle end clamping block and the handle ball through threads, the center of the handle end clamping block is provided with a center hole, the upper side of the center hole is provided with a clamping groove which is communicated with the center hole and the upper side edge of the handle end clamping block, the handle end clamping block is also provided with a locking threaded hole which transversely penetrates through the clamping groove, the sliding rod penetrates through the center hole, a screw is screwed into the locking threaded hole to lock the end handle clamping block in the middle of the sliding rod, and therefore the handheld part is fixed on the fixed structural part.

As a further improvement, the motion structure component comprises a screw rod, a left claw hook component and a right claw hook component; the two ends of the screw are axially supported in the upper connecting holes of the two end plates through rolling bearings and are parallel to the sliding rod, the left half section and the right half section of the periphery of the screw are respectively provided with left-handed threads and right-handed threads, the left claw hook assembly and the right claw hook assembly are respectively connected with the left-handed threads and the right-handed threads of the screw and are guided by the sliding rod to do left-right opposite or opposite linear motion, the left claw hook assembly and the right claw hook assembly hook the two ends of the piston ring, and the rotating screw drives the left claw hook assembly and the right claw hook assembly to move in opposite directions towards the two sides so as to prop the piston ring open.

As a further improvement, an annular groove is arranged at the outer end of the screw rod, a snap ring is embedded into the annular groove to fix the relative position of the screw rod and the end plate in the axial direction, and a spanner head is arranged at the right end of the screw rod.

As a further improvement, the right claw hook assembly comprises a slide block, a claw hook seat, a long claw hook, a bushing and a right-handed nut; the slider is provided with an upper through hole and a lower through hole which are parallel to each other in axis, the internal thread of the right-handed nut is a right-handed thread and is fixed in the upper through hole, the right-handed nut is connected to the right half section of the screw rod through the right-handed thread, and the bushing is arranged in the lower through hole and is sleeved on the sliding rod; the claw hook seat is connected to the upper part of the sliding block through a bolt and a nut and can rotate around the bolt; the upper part of the claw hook seat is provided with an open slot embedded into the piston ring, two side walls of the open slot are respectively provided with a threaded through hole, and a locking bolt used for clamping and fixing the piston ring is screwed in the threaded through hole; the long claw hook is a right-angle component and is fixed on the claw hook seat through a fastening bolt.

As a further improvement, the lower part of the long claw hook is provided with a square boss, the upper part of the claw hook seat is provided with a square groove, and the square boss is embedded into the square groove to position the long claw hook.

As a further improvement, the left claw hook component is connected with the left-hand thread of the screw rod and sleeved on the sliding rod, and the position and the direction are opposite to those of the right claw hook component; the left claw hook component has the same structure as the right claw hook component except that a left-handed nut is used for replacing the right-handed nut and a short claw hook is used for replacing the long claw hook, and the left claw hook component comprises a sliding block, a claw hook seat, a short claw hook, a bushing and a left-handed nut.

As a further improvement, the lower through hole of the sliding block is in interference fit with the bushing, and the upper through hole of the sliding block is in interference fit with the left-handed nut and the right-handed nut respectively.

Compared with the prior art, the invention achieves the following effects:

1. the invention has strong universality and can meet the dismounting and mounting of piston rings with different sizes.

2. The invention is provided with the locking bolt which can lock the piston ring, thereby ensuring that the piston ring is not flicked off in the process of disassembly and assembly, ensuring the safety of personnel and simultaneously not damaging the piston ring, the piston and the like.

3. The invention drives the sliding block and the claw hook seat to move leftwards or rightwards by rotating the screw rod, and has the advantages of stable movement and high reliability because the screw rod and the screw nut on the sliding block are in threaded transmission.

4. The claw hook seat can rotate around the bolt, and the two claw hooks are slightly longer and shorter, so that the operation of installing the piston ring is more convenient and flexible.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a structural view of the end plate.

Fig. 4 is a structural view of the slide bar.

Fig. 5 is a structural view of the shank-end clamp block.

Fig. 6 is a structural view of the handle.

Fig. 7 is a structural view of the screw.

Fig. 8 is a structural view of the slider.

Fig. 9 is a structural view of a right-hand nut.

Fig. 10 is a structural view of the claw hook holder.

Fig. 11 is a structural view of a long claw hook.

Fig. 12 is a state diagram of the use of the present invention.

In the figure:

1-end plate, 101-upper connecting hole, 102-lower connecting hole, 2-snap ring, 3-claw hook base, 31-fitting hole, 32-threaded through hole, 33-square groove, 34-fastening screw hole, 4-locking bolt, 5-long claw hook, 51-claw, 52-square boss, 53-bolt hole, 6-screw rod, 61-left-hand thread, 62-right-hand thread, 63-journal, 64-wrench head, 65-annular groove, 7-fastening bolt, 8-bushing, 9-slider, 91-upper through hole, 92-lower through hole, 93-pin hole, 94-fixing hole, 10-right-hand nut, 11-screw, 12-slide bar, 121-internal threaded hole, 13-internal hexagonal bolt, 14-nut, 15-bolt, 16-handle, 17-handle end clamp block, 171-center hole, 172-internal threaded hole, 173-clamp groove, 174-locking threaded hole, 18-handle ball, 19-rolling bearing, 20-elastic pin, 21-left-handed nut, 22-short claw hook.

Detailed Description

The present invention is further illustrated with reference to the following figures and specific examples, which are not intended to limit the scope of the invention as claimed.

The invention provides a disassembling tool for a large marine diesel engine piston ring, which mainly comprises the following three parts: a hand-held component, a fixed structural component, and a moving structural component; the hand-held part is fixedly connected with the middle part of the fixed structural part, and the moving structural part is connected with the fixed structural part and can move outwards from left to right along the fixed structural part, so that the piston ring is spread and is detached from the piston.

Referring to fig. 1 and 2, the fixed structure includes a sliding rod 12 and two end plates 1. Referring to fig. 3, the upper and lower portions of the end plate 1 are respectively provided with an upper connection hole 101 and a lower connection hole 102, the upper connection hole 101 at the upper portion is used for connecting the moving structural member, the two end plates 1 are respectively connected to the left and right ends of the sliding rod 12 through the lower connection holes 102 at the lower portions, and the two end plates 1 are symmetrically arranged in left and right directions; referring to fig. 4, both ends of the sliding rod 12 are provided with internal threaded holes 121, and two hexagon socket head screws 13 respectively penetrate the lower connecting holes 102 of the two end plates 1 and are screwed into the internal threaded holes 121 at both ends of the sliding rod 12 to fixedly connect the two end blocks 1 with the sliding rod 12. The slide rod 12 is connected between the two end blocks 1 and can rotate. The fixed structural part constitutes the basic frame of the assembly and disassembly tool, providing support and motion guidance for the moving structural part.

Referring to fig. 1 and 5 in combination, the hand-held device includes a handle ball 18, a handle 16, and a grip block 17. Referring to fig. 5, the center of the shank-end clamping block 17 is provided with a center hole 171, the upper side of the center hole 171 is provided with a clamping groove 173 communicating the center hole 171 with the upper side of the shank-end clamping block 17, and the shank-end clamping block 17 is further provided with a locking threaded hole 174 transversely penetrating through the clamping groove 173. The handle ball 18 is made of plastic materials, hand-held feeling is good, and the metal edge of the handle can be prevented from scratching the hand. Referring to fig. 6, the handle 16 has external threads at both upper and lower ends thereof, and the external threads are respectively connected and fixed with the internal thread hole 172 of the handle end clamp block 17 and the internal thread hole of the handle ball 18. The rod 12 of the fixed structure member passes through the center hole 171 of the shank end clamp block 17, and a screw 11 is screwed into the locking screw hole 174 to lock the end clamp block 17 to the center of the rod 12, thereby fixing the hand held member to the fixed structure member.

Referring to fig. 1, the moving structure part includes a screw 6, a left claw hook assembly and a right claw hook assembly; two ends of the screw rod 6 are axially arranged in the upper connecting holes 101 of the two end plates 1 of the fixed structural component through rolling bearings 19; the left claw hook component and the right claw hook component are used for hooking two ring opening ends of the piston ring, the left claw hook component and the right claw hook component are respectively connected with two side parts of the screw rod 6 and are guided by the slide rod 12 to do left-right opposite or opposite linear motion, the rotating screw rod 6 drives the left claw hook component and the right claw hook component to oppositely move towards two sides, and the piston ring is opened.

Referring to fig. 7, the left half section and the right half section of the outer periphery of the screw 6 are respectively provided with a left-handed thread 61 and a right-handed thread 62, the screw 6 outside the left-handed thread 61 and the right-handed thread 62 is provided with a journal 63, the journal 63 is mounted in the upper connecting hole 101 of the end plate 1 through the rolling bearing 19, the inner circle of the rolling bearing 19 is respectively fitted onto the journal 63 in an interference manner, and the outer circle of the rolling bearing is embedded in the upper connecting hole 101 of the end plate 1. The screw 6 is parallel to the slide bar 12. An annular groove 65 is formed at the outer end of the left journal 63, and a snap ring 2 is embedded in the annular groove 65 to fix the position of the screw rod 6 and the end plate 1 relatively in the axial direction. The outer end of the right journal 63 and the right end of the screw 6 are wrench heads 64 for manually rotating the screw 6 with pliers or a wrench, and the cross section of the wrench heads 64 is square or regular hexagon.

Referring to fig. 1, the right claw hook assembly is connected to the right-hand thread 62 of the screw rod 6 and is sleeved on the slide rod 12, and includes a slide block 9, a claw hook seat 3, a long claw hook 5, a bushing 8 and a right-hand nut 10. Referring to fig. 8, the slider 9 is transversely provided with an upper through hole 91 and a lower through hole 92, and the axes of the upper through hole 91 and the lower through hole 92 are parallel; the middle part of the sliding block 9 is provided with a pin hole 93 communicated with the upper through hole 91, and the axis of the pin hole 93 is vertical to the axes of the upper through hole 91 and the lower through hole 92; the upper part of the sliding block 9 is provided with a fixing hole 94 connected with the claw hook seat 3. Referring to fig. 9, the internal thread of the right-handed nut 10 is a right-handed thread, and is disposed in the upper through hole 91 and is in interference fit with the upper through hole 91, an elastic pin 20 penetrates through the pin hole 93 of the slider 9 to lock the right-handed nut 10 in the upper through hole 91 of the slider 9, and the right-handed nut 10 is connected to the right half section of the screw rod 6 through the right-handed thread 62. The bush 8 is disposed in the lower through hole 92 and is in interference fit with the lower through hole 92, and the bush 8 is fitted over the slide rod 12 of the fixed structural member and slides left and right on the slide rod 12 together with the slider 9. The inner wall of the bushing 8 and the surface of the slide rod 12 should be smooth enough to reduce the resistance to sliding of the slide 9. The claw hook seat 3 is assembled and connected on the upper part of the sliding block 9 and can rotate around the bolt 15 within a certain range. Referring to fig. 10, the lower portion of the claw hook base 3 is provided with a transverse assembly hole 31, and the bolt 15 and the nut 14 connect the claw hook base 3 with the slider 9 through the assembly hole 31 and the fixing hole 94; an open groove 35 is formed in the right side of the upper portion of the claw hook seat 3 and used for being embedded into the piston ring, threaded through holes 32 are symmetrically formed in two side walls of the open groove 35, and locking bolts 4 are screwed in the threaded through holes 32 and used for clamping and fixing the end portion of the piston ring; a square groove 33 is formed in the left side of the upper portion of the claw hook seat 3 and used for positioning the long claw hook 5, and a vertical fastening screw hole 34 is formed in the bottom of the square groove 33. The long claw hook 5 is a right-angle member, please refer to fig. 11, a transverse claw 51 is arranged at the upper part of the long claw hook 5, and the claw 51 is slightly longer; a square boss 52 is provided at the lower part of the long claw hook 5, and a bolt hole 53 penetrating vertically is provided between the square boss 52 and the upper plane of the long claw hook 5. The square boss 52 is inserted into the square groove 33 of the claw hook holder 3 for positioning, and the fastening bolt 7 is screwed into the fastening screw hole 34 through the bolt hole 53, thereby fixing the long claw hook 5 to the claw hook holder 3.

Referring to fig. 1, the left grappling hook assembly is connected to the left-hand thread 61 of the screw rod 6 and is sleeved on the slide rod 12, and the position and the direction are opposite to those of the right-hand grappling hook assembly; the left grapple assembly has the same structure as the right grapple assembly except that the right-hand nut 10 is replaced with a left-hand nut 21 and the long grapple 5 is replaced with a short grapple 22.

The left claw hook component comprises a slide block 9, a claw hook seat 3, a short claw hook 22, a bushing 8 and a left-handed nut 21. Referring to fig. 9, the internal thread of the left-hand nut 21 is a left-hand thread, and is disposed in the upper through hole 91 of the other slider 9 and is in interference fit with the upper through hole 91, an elastic pin 20 penetrates through the pin hole 93 of the slider 9 to lock the left-hand nut 21 in the upper through hole 91 of the slider 9, and the left-hand nut 21 is connected to the left half section of the screw rod 6 through the left-hand thread 61. The bushing 8 is disposed in the lower through hole 92, and is sleeved on the slide rod 12, and slides left and right on the slide rod 12 together with the slide block 9. The other claw hook seat 3 is assembled and connected to the upper part of the sliding block 9 through a bolt 15 and a nut 14, and can rotate around the bolt 15 within a certain range. The short claw hook 22 is a right-angle-shaped component, the upper part of the short claw hook 22 is provided with a transverse claw which is shorter than the claw 51 and is convenient for assembling and disassembling the piston ring; the lower part of the short claw hook 22 is provided with a square boss, a bolt hole which is communicated up and down is arranged between the square boss and the upper plane of the short claw hook 22, the square boss is embedded into the square groove 33 of the claw hook seat 3, and the claw 51 is fixed on the claw hook seat 3 through a fastening bolt 7.

Referring to fig. 1 and fig. 12, the working steps of the present invention are:

firstly, rotating the screw rod 6 to enable the left claw hook assembly and the right claw hook assembly to move towards each other, adjusting the distance between the long claw hook 5 and the short claw hook 22 to be minimum, then embedding the open end of the piston ring A into the open slot 35 of the disassembling tool B (note that the side of the long claw hook 5 is firstly installed, and the side of the short claw hook 22 is installed), and screwing all the locking bolts 4 to keep the stability of the piston ring A so as to prevent the piston ring A from popping up in the disassembling process and causing injury to personnel or other articles; after the piston ring A is clamped firmly, a wrench head part 64 on the side edge of the screw rod 6 is screwed by a wrench, and the two sliding blocks 9 respectively drive the claw hook seat 3, the long claw hook 5 and the short claw hook 22 to move reversely left and right through the transmission of the left-handed thread 61 and the right-handed thread 62, so that the piston ring A is propped open; when the piston ring A is sufficiently spread, the piston ring A can be mounted or dismounted. When the dismounting tool needs to be removed from the piston ring A, the wrench head 64 is turned in the opposite direction by a wrench until the piston ring A is completely free, all the locking bolts 4 are loosened, and the dismounting tool can be dismounted (the side of the short claw hook 22 is dismounted first).

The piston ring has the advantages of simple structure, safety and convenience in use, strong universality and the like, and can be widely applied to the disassembly and assembly of the piston ring of the large marine diesel engine.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. That is, all equivalent changes and modifications made within the scope of the present invention should be considered to be within the technical scope of the present invention.

Claims

1. The utility model provides a assembly and disassembly tools for large-scale marine diesel piston ring which characterized in that: the disassembling tool comprises a handheld part, a fixed structural part and a moving structural part; the hand-held part is fixedly connected to the middle part of the fixed structural part, and the moving structural part is connected to the fixed structural part and can move outwards or inwards leftwards and rightwards along the fixed structural part, so that the piston ring is expanded, and the piston ring is assembled and disassembled.

2. The dismounting tool for a large marine diesel piston ring according to claim 1, characterized in that: the fixed structure part comprises a sliding rod and two end plates; the upper portion and the lower portion of the end plate are respectively provided with an upper connecting hole and a lower connecting hole, the two end plates are arranged in a bilateral symmetry mode, two ends of the sliding rod respectively penetrate into the lower connecting holes of the two end plates, and the sliding rod is fixedly connected between the two end blocks through the hexagon socket head cap screws.

3. The disassembly and assembly tool for a piston ring of a large marine diesel engine according to claim 2, characterized in that: the hand-held component comprises a handle ball, a handle and a handle end clamping block; the upper end and the lower end of the handle are respectively connected and fixed with the handle end clamping block and the handle ball through threads, the center of the handle end clamping block is provided with a center hole, the upper side of the center hole is provided with a clamping groove which is communicated with the center hole and the upper side edge of the handle end clamping block, the handle end clamping block is also provided with a locking threaded hole which transversely penetrates through the clamping groove, the sliding rod penetrates through the center hole, a screw is screwed into the locking threaded hole to lock the end handle clamping block in the middle of the sliding rod, and therefore the handheld part is fixed on the fixed structural part.

4. The disassembly and assembly tool for a piston ring of a large marine diesel engine according to claim 2, characterized in that: the motion structure component comprises a screw, a left claw hook component and a right claw hook component; the two ends of the screw are axially supported in the upper connecting holes of the two end plates through rolling bearings and are parallel to the sliding rod, the left half section and the right half section of the periphery of the screw are respectively provided with left-handed threads and right-handed threads, the left claw hook assembly and the right claw hook assembly are respectively connected with the left-handed threads and the right-handed threads of the screw and are guided by the sliding rod to do left-right opposite or opposite linear motion, the left claw hook assembly and the right claw hook assembly hook the two ends of the piston ring, and the rotating screw drives the left claw hook assembly and the right claw hook assembly to move in opposite directions towards the two sides so as to prop the piston ring open.

5. The disassembly and assembly tool for a piston ring of a large marine diesel engine according to claim 4, characterized in that: the outer end of the screw rod is provided with an annular groove, a clamping ring is embedded into the annular groove to fix the relative position of the screw rod and the end plate in the axial direction, and the right end part of the screw rod is a wrench head part.

6. The disassembly and assembly tool for a piston ring of a large marine diesel engine according to claim 4, characterized in that: the right claw hook component comprises a sliding block, a claw hook seat, a long claw hook, a bushing and a right-handed nut; the slider is provided with an upper through hole and a lower through hole which are parallel to each other in axis, the internal thread of the right-handed nut is a right-handed thread and is fixed in the upper through hole, the right-handed nut is connected to the right half section of the screw rod through the right-handed thread, and the bushing is arranged in the lower through hole and is sleeved on the sliding rod; the claw hook seat is connected to the upper part of the sliding block through a bolt and a nut and can rotate around the bolt; the upper part of the claw hook seat is provided with an open slot embedded into the piston ring, two side walls of the open slot are respectively provided with a threaded through hole, and a locking bolt used for clamping and fixing the piston ring is screwed in the threaded through hole; the long claw hook is a right-angle component and is fixed on the claw hook seat through a fastening bolt.

7. The disassembly and assembly tool for a piston ring of a large marine diesel engine according to claim 6, characterized in that: the lower part of the long claw hook is provided with a square boss, the upper part of the claw hook seat is provided with a square groove, and the square boss is embedded into the square groove to position the long claw hook.

8. The disassembly and assembly tool for a piston ring of a large marine diesel engine according to claim 6, characterized in that: the left claw hook component is connected with the left thread of the screw rod and sleeved on the sliding rod, and the position and the direction of the left claw hook component are opposite to those of the right claw hook component; the left claw hook component has the same structure as the right claw hook component except that a left-handed nut is used for replacing the right-handed nut and a short claw hook is used for replacing the long claw hook, and the left claw hook component comprises a sliding block, a claw hook seat, a short claw hook, a bushing and a left-handed nut.

9. The disassembly and assembly tool for a piston ring of a large marine diesel engine according to claim 8, characterized in that: the lower through hole of the sliding block is in interference fit with the bushing, and the upper through hole of the sliding block is in interference fit with the left-handed nut and the right-handed nut respectively.