CN114799729B - Assembly tool and method for reinforcing back ring of cylinder liner of large-diameter low-speed diesel engine - Google Patents
Assembly tool and method for reinforcing back ring of cylinder liner of large-diameter low-speed diesel engine Download PDFInfo
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- CN114799729B CN114799729B CN202210270457.9A CN202210270457A CN114799729B CN 114799729 B CN114799729 B CN 114799729B CN 202210270457 A CN202210270457 A CN 202210270457A CN 114799729 B CN114799729 B CN 114799729B
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- back ring
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000005452 bending Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000001174 ascending effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P11/00—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for
- B23P11/02—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits
- B23P11/025—Connecting or disconnecting metal parts or objects by metal-working techniques not otherwise provided for by first expanding and then shrinking or vice versa, e.g. by using pressure fluids; by making force fits by using heat or cold
Abstract
The invention provides an assembly fixture and a method for a reinforcing back ring of a cylinder sleeve of a large-diameter low-speed diesel engine, comprising an inner support ring, wherein a support locking mechanism matched with a central hole of the cylinder sleeve is arranged and installed on the outer circumference of the inner support ring; an arc-shaped guide plate is fixed at the top end of the inner support ring through a vertical plate; the arc top end of the arc-shaped guide plate is matched with the arc-shaped inner wall of the reinforced back ring to be assembled; the back ring is characterized by further comprising a ring sleeve for hoisting the reinforcing back ring, wherein the ring sleeve adopts an opening structure, a connecting lug is formed by bending the opening part, and a hanging hole is formed in the connecting lug. The method solves the problems of reworking and potential safety hazard caused by adopting a vertical installation mode between the cylinder sleeve and the reinforced back ring, greatly shortens the installation time, refuses the repeated construction period, achieves the purposes and effects of greatly improving the production efficiency and safety, and can be popularized to the mode improvement of the general large-scale vertical installation.
Description
Technical Field
The invention relates to an assembly fixture and a method for a reinforcing back ring of a cylinder sleeve of a large-diameter low-speed diesel engine, and belongs to the technical field of assembly of parts of diesel engines.
Background
The cylinder liner is the central working part of a reciprocating engine in which the piston moves. The reinforcing back ring is a supporting ring sleeve arranged on the cylinder sleeve of the diesel engine, plays a role in supporting and reinforcing, and is generally arranged in a hot sleeve mounting mode. As shown in fig. 1, 1 is a reinforcing backing ring.
In the process of assembling the reinforcing back ring of the cylinder sleeve of an important part of the diesel engine, through finding after investigation, all domestic main engine manufacturers adopt a vertical assembling mode, in the specific installation process, for example, a cylinder sleeve with the cylinder diameter of 500mm is about 2000kg, after a cylinder sleeve blank is produced, the heat jacket reinforcing back ring is firstly needed, then secondary finish machining is carried out to obtain a finished product, and the original assembling process is as follows: firstly, erecting a lying blank cylinder sleeve, and performing one-time turning operation, wherein a cylinder sleeve turning tool is needed in the process; in addition, as the reinforced back ring has no hoisting position, two hoisting nuts are welded at the upper edge of the reinforced back ring for simple hoisting, and then the hot jacket operation of the reinforced back ring is carried out according to the size of the cylinder sleeve and the ascending operation is needed, so that the reinforced back ring has the advantages of high difficulty, high risk, high material consumption, more reciprocating operation, large artificial uncontrollable factors and easy problem of cylinder sleeve scrapping caused by clamping of the reinforced back ring; and to some extent, a series of problems such as safety, time, personnel, etc. are involved, and thus improvement in the assembly process is required.
Disclosure of Invention
Aiming at the problems, the invention aims to provide the assembly fixture and the method for the reinforcing back ring of the cylinder sleeve of the large-diameter low-speed diesel engine, which solve the problems of reworking and potential safety hazard caused by adopting a vertical mounting mode between the cylinder sleeve and the reinforcing back ring, greatly shorten the mounting time, reject the repeated construction period, achieve the purposes and effects of greatly improving the production efficiency and safety, and can be popularized to the improvement of a mode of general large-scale vertical mounting.
In order to achieve the technical characteristics, the aim of the invention is realized in the following way: the assembly fixture for the reinforcing back ring of the cylinder sleeve of the large-diameter low-speed diesel engine comprises an inner support ring, wherein a support locking mechanism matched with a central hole of the cylinder sleeve is arranged and installed on the outer circumference of the inner support ring; an arc-shaped guide plate is fixed at the top end of the inner support ring through a vertical plate; the arc top end of the arc-shaped guide plate is matched with the arc-shaped inner wall of the reinforced back ring to be assembled;
the back ring is characterized by further comprising a ring sleeve for hoisting the reinforcing back ring, wherein the ring sleeve adopts an opening structure, a connecting lug is formed by bending the opening part, and a hanging hole is formed in the connecting lug.
The supporting locking mechanism comprises a plurality of bolt holes which are uniformly distributed and processed on the inner supporting ring, and the bolt holes are radially arranged; the bolt hole is matched with a jacking bolt through screw thread transmission, and the inner support ring is supported inside the central hole through the jacking bolt.
And a limiting angle plate is fixed on the outer wall of the inner support ring and positioned on the opposite side of the vertical plate, and the limiting angle plate is matched with the central hole.
Reinforcing rib plates are arranged between the connecting lugs and the outer wall of the ring sleeve.
And an inclined supporting plate is fixedly arranged between the arc-shaped guide plate and the vertical plate.
An included angle A is formed between the top radial line of the arc-shaped guide plate and the axis of the cylinder sleeve.
The value of A is 5-8 degrees.
When the cylinder sleeve is assembled, the horizontal support structure for supporting the cylinder sleeve is also included; the horizontal supporting structure comprises a head base plate, an arc-shaped plate is supported at the top end of the head base plate, the head of the cylinder sleeve is supported at the top end of the arc-shaped plate, and the tail of the cylinder sleeve is supported at the top end of the tail base plate.
The number of the jacking bolts is at least four groups, and the jacking bolts are symmetrically arranged along the axial lead of the cylinder sleeve.
The assembly method for reinforcing the back ring of the cylinder liner of the large-diameter low-speed diesel engine by adopting the assembly tool comprises the following steps of:
step one, the horizontal support of the cylinder sleeve is limited:
according to the size of the cylinder sleeve and the requirements of the supporting part, arranging corresponding arc-shaped plates, head backing plates and tail backing plates, supporting the whole cylinder sleeve between the arc-shaped plates and the tail backing plates at a certain inclined angle, and ensuring that the height of the side of the reinforced back ring assembly section is higher than the height of the other end of the reinforced back ring assembly section;
step two, adjusting and installing an inner support ring:
sleeving the inner support ring in the central hole, and then adjusting the position of the corresponding jacking bolt to ensure that the top end of the arc-shaped guide plate is kept flush with the outer top end of the reinforced back ring assembly section;
step three, heat treatment of the reinforced back ring:
according to the heating process requirement during the assembly of the reinforcing back ring, the reinforcing back ring is subjected to heating treatment so as to ensure that the reinforcing back ring can be smoothly sleeved at the assembly section of the reinforcing back ring of the cylinder sleeve in the follow-up process;
step four, lifting the reinforced back ring:
installing a ring sleeve on the heated reinforced back ring, and hoisting the reinforced back ring in a hoisting mode;
step five, reinforcing the back ring device:
the reinforcing back ring is supported at the top of the arc-shaped guide plate in a sleeved mode after being hoisted, and the reinforcing back ring is pushed along the arc-shaped guide plate to be sleeved outside the reinforcing back ring assembly section.
The invention has the following beneficial effects:
1. by adopting the assembly fixture, the original vertical assembly mode is replaced by the horizontal assembly mode, so that reworking and potential safety hazards caused by the vertical assembly mode are solved, the assembly time is greatly shortened, the repeated construction period is refused, the purposes and effects of greatly improving the production efficiency and safety are achieved, and the assembly fixture can be popularized to the improvement of the mode of general large-scale vertical assembly.
2. By adopting the assembly fixture, the steps of turning over operation are reduced; the dangers of ascending operation and cylinder sleeve tilting are avoided; the hoisting rate of large pieces is reduced, and the simple operation is performed by workers.
3. The operation time of the reinforced back ring welding and polishing hoisting tool is shortened: taking six cylinder sleeves as an example, the cycle is shortened to 2 hours from 6 hours, and the number of people is reduced to 3 people from 5 people.
4. And the production management, the technical management and the quality management are in accordance with the modern enterprise standard.
Drawings
The invention is further described below with reference to the drawings and examples.
FIG. 1 is a diagram of the assembly of the reinforcing back ring and cylinder liner of the present invention.
Fig. 2 is a front cross-sectional view of the inner support ring of the present invention.
Fig. 3 is a front view of the inner support ring of the present invention.
Fig. 4 is a front view of the collar of the present invention.
FIG. 5 is a first perspective view of the inner support ring of the present invention after assembly with a cylinder liner.
FIG. 6 is a second perspective view of the inner support ring of the present invention after assembly with a cylinder liner.
FIG. 7 is a three-dimensional view of the reinforcement back ring of the present invention after assembly with the collar.
In the figure: the reinforcing back ring 1, the cylinder sleeve 2, the inner support ring 3, the bolt holes 4, the vertical plate 5, the arc-shaped guide plate 6, the inclined support plate 7, the limit angle plate 8, the ring sleeve 9, the reinforcing rib plate 10, the connecting lugs 11, the hanging holes 12, the reinforcing back ring assembly section 13, the arc-shaped plate 14, the head base plate 15, the jacking bolts 16, the central hole 17 and the tail base plate 18.
Detailed Description
Embodiments of the present invention will be further described with reference to the accompanying drawings.
Example 1:
referring to fig. 1-7, the assembly fixture of the reinforcing back ring of the cylinder liner of the large-diameter low-speed diesel engine comprises an inner support ring 3, wherein a support locking mechanism for matching with a central hole 17 of a cylinder liner 2 is arranged and installed on the outer circumference of the inner support ring 3; the top end of the inner support ring 3 is fixed with an arc-shaped guide plate 6 through a vertical plate 5; the arc top end of the arc-shaped guide plate 6 is matched with the arc-shaped inner wall of the reinforced back ring 1 to be assembled; the back ring is characterized by further comprising a ring sleeve 9 for hoisting the reinforced back ring 1, wherein the ring sleeve 9 adopts an opening structure, a connecting lug 11 is formed by bending at the opening part, and a hanging hole 12 is processed on the connecting lug 11. Through foretell assembly fixture, can replace original vertical assembly mode with horizontal assembly mode, solve rework and the potential safety hazard that vertical installation mode led to, shortened installation time greatly, refused the repeated time limit for a project, reached purpose and the effect that has improved production efficiency and safety by a wide margin, can promote to the mode improvement of general large-scale vertical installation.
Further, the supporting and locking mechanism comprises a plurality of bolt holes 4 which are uniformly distributed and processed on the inner supporting ring 3, and the bolt holes 4 are radially arranged; the bolt hole 4 is matched with a jacking bolt 16 through screw thread transmission, and the inner support ring 3 is supported inside the central hole 17 through the jacking bolt 16. The supporting and locking mechanism can be used for adjusting the supporting position of the inner supporting ring 3, so that the supporting height of the arc-shaped guide plate 6 is adjusted, the arc-shaped guide plate is enabled to be flush with the top end of the reinforced back ring assembly section 13, and then the guide in the subsequent assembly process of the reinforced back ring 1 is realized.
Further, a limiting angle plate 8 is fixed on the outer wall of the inner support ring 3 and located on the opposite side of the vertical plate 5, and the limiting angle plate 8 is matched with the central hole 17. The limiting angle plate 8 can be used for limiting the inner support ring 3 in the process of being equipped, so that the inner support ring is accurately positioned and installed in the center hole 17.
Further, a reinforcing rib plate 10 is arranged between the connecting lug 11 and the outer wall of the annular sleeve 9. The structural strength between the connecting lugs 11 and the ring sleeve 9 is enhanced by the reinforcing rib plates 10.
Further, an inclined supporting plate 7 is fixedly arranged between the arc-shaped guide plate 6 and the vertical plate 5. The supporting structure strength and stability between the arc-shaped guide plate 6 and the vertical plate 5 are enhanced by the diagonal bracing plate 7.
Further, an included angle A is formed between the radial line at the top end of the arc-shaped guide plate 6 and the axial line of the cylinder sleeve 2. The value of A is 5-8 degrees. By adopting the above-mentioned inclination angle, it is ensured that the subsequent cylinder liner 2 can be smoothly slid onto the reinforcing back ring assembly section 13.
Further, the horizontal support structure for supporting the cylinder sleeve 2 is also included during assembly; the horizontal supporting structure comprises a head base plate 15, an arc-shaped plate 14 is supported at the top end of the head base plate 15, the head of the cylinder sleeve 2 is supported at the top end of the arc-shaped plate 14, and the tail of the cylinder sleeve 2 is supported at the top end of a tail base plate 18. The horizontal support structure can realize the horizontal support of the cylinder sleeve 2, thereby replacing the traditional vertical assembly. And the stability of the horizontal support of the cylinder sleeve 2 is ensured, and the cylinder sleeve is prevented from shaking.
Further, the number of the jacking bolts 16 is at least four, and the jacking bolts are symmetrically arranged along the axial line of the cylinder sleeve 2. The supporting position of the inner supporting ring 3 inside the cylinder sleeve 2 is ensured by adopting the plurality of groups of the jacking bolts 16.
Further, the cylinder sleeve 2 is horizontally laid at an angle of 30 degrees in the horizontal assembly process.
Example 2:
the assembly method for reinforcing the back ring of the cylinder liner of the large-diameter low-speed diesel engine by adopting the assembly tool comprises the following steps of:
step one, the horizontal support of the cylinder sleeve 2 is limited:
according to the size of the cylinder sleeve 2 and the requirements of the supporting part, arranging a corresponding arc-shaped plate 14, a head backing plate 15 and a tail backing plate 18, supporting the whole cylinder sleeve 2 between the arc-shaped plate 14 and the tail backing plate 18 at a certain inclined angle, and ensuring that the height of the side of the reinforced back ring assembly section 13 is higher than the height of the other end;
step two, adjusting and installing the inner support ring 3:
the inner support ring 3 is sleeved in the central hole 17, and then the position of the corresponding jacking bolt 16 is adjusted, so that the top end of the arc-shaped guide plate 6 is kept flush with the outer top end of the reinforced back ring assembly section 13;
step three, heat treatment of the reinforcing back ring 1:
according to the heating process requirement during the assembly of the reinforcing back ring 1, the reinforcing back ring 1 is subjected to heating treatment so as to ensure that the reinforcing back ring assembly section 13 of the cylinder sleeve 2 can be smoothly sleeved in the subsequent process;
step four, lifting the reinforced back ring 1:
the reinforcing back ring 1 after heating is provided with a ring sleeve 9, and the reinforcing back ring 1 is lifted in a lifting mode;
step five, reinforcing the back ring 1:
after the reinforced back ring 1 is hoisted, the reinforced back ring is sleeved and supported on the top of the arc-shaped guide plate 6, and the reinforced back ring 1 is pushed along the arc-shaped guide plate 6 to be sleeved outside the reinforced back ring assembly section 13.
Claims (7)
1. The assembly method of the reinforcing back ring of the cylinder liner of the large-cylinder-diameter low-speed diesel engine comprises an assembly tool of the reinforcing back ring of the cylinder liner of the large-cylinder-diameter low-speed diesel engine, wherein the assembly tool comprises an inner support ring (3), and a support locking mechanism matched with a central hole (17) of a cylinder liner (2) is arranged and installed on the outer circumference of the inner support ring (3); an arc-shaped guide plate (6) is fixed at the top end of the inner support ring (3) through a vertical plate (5); the arc top end of the arc guide plate (6) is matched with the arc inner wall of the reinforced back ring (1) to be assembled;
the device further comprises a ring sleeve (9) for hoisting the reinforced back ring (1), wherein the ring sleeve (9) adopts an opening structure, a connecting lug (11) is formed by bending at the opening part, and a hanging hole (12) is processed on the connecting lug (11);
the supporting and locking mechanism comprises a plurality of bolt holes (4) which are uniformly distributed and processed on the inner supporting ring (3), and the bolt holes (4) are radially arranged; the bolt hole (4) is matched with a jacking bolt (16) through screw thread transmission, and the inner supporting ring (3) is supported in the central hole (17) through the jacking bolt (16);
the horizontal support structure is used for supporting the cylinder sleeve (2) during assembly; the horizontal supporting structure comprises a head base plate (15), an arc-shaped plate (14) is supported at the top end of the head base plate (15), the head of the cylinder sleeve (2) is supported at the top end of the arc-shaped plate (14), and the tail of the cylinder sleeve (2) is supported at the top end of a tail base plate (18);
the assembly method is characterized by comprising the following steps of:
step one, the horizontal support of the cylinder sleeve (2) is limited:
according to the size of the cylinder sleeve (2) and the requirements of the supporting part, arranging a corresponding arc-shaped plate (14), a head base plate (15) and a tail base plate (18), supporting the whole cylinder sleeve (2) between the arc-shaped plate (14) and the tail base plate (18) at a certain inclined angle, and ensuring that the height of the side of the reinforced back ring assembly section (13) is higher than the height of the other end;
step two, adjusting and installing the inner support ring (3):
the inner support ring (3) is sleeved in the central hole (17), and then the position of the corresponding jacking bolt (16) is adjusted, so that the top end of the arc-shaped guide plate (6) is kept flush with the outer top end of the reinforced back ring assembly section (13);
step three, heat treatment of the reinforced back ring (1):
according to the heating process requirement during the assembly of the reinforcing back ring (1), the reinforcing back ring (1) is subjected to heating treatment so as to ensure that the reinforcing back ring assembly section (13) of the cylinder sleeve (2) can be successfully sleeved in the subsequent process;
step four, lifting the reinforced back ring (1):
installing a ring sleeve (9) on the heated reinforced back ring (1), and lifting the reinforced back ring (1) in a lifting manner;
step five, reinforcing the equipment of the back ring (1):
the reinforced back ring (1) is hung and then sleeved and supported on the top of the arc-shaped guide plate (6), and the reinforced back ring (1) is pushed along the arc-shaped guide plate (6) to be sleeved outside the reinforced back ring assembly section (13).
2. The method for assembling the reinforcing back ring of the cylinder liner of the large-diameter low-speed diesel engine according to claim 1, wherein the method comprises the following steps: and a limiting angle plate (8) is fixed on the outer wall of the inner support ring (3) and positioned on the opposite side of the vertical plate (5), and the limiting angle plate (8) is matched with the central hole (17).
3. The method for assembling the reinforcing back ring of the cylinder liner of the large-diameter low-speed diesel engine according to claim 1, wherein the method comprises the following steps: reinforcing rib plates (10) are arranged between the connecting lugs (11) and the outer wall of the annular sleeve (9).
4. The method for assembling the reinforcing back ring of the cylinder liner of the large-diameter low-speed diesel engine according to claim 1, wherein the method comprises the following steps: an inclined supporting plate (7) is fixedly arranged between the arc-shaped guide plate (6) and the vertical plate (5).
5. The method for assembling the reinforcing back ring of the cylinder liner of the large-diameter low-speed diesel engine according to claim 1, wherein the method comprises the following steps: an included angle A is formed between the top radial line of the arc-shaped guide plate (6) and the axis of the cylinder sleeve (2).
6. The method for assembling the reinforcing back ring of the cylinder liner of the large-diameter low-speed diesel engine according to claim 5, wherein the method comprises the following steps of: the included angle A is 5-8 degrees.
7. The assembly fixture for reinforcing a back ring of a cylinder liner of a large-diameter low-speed diesel engine according to claim 1, wherein the assembly fixture comprises: the number of the jacking bolts (16) is at least four, and the jacking bolts are symmetrically arranged along the axial lead of the cylinder sleeve (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210270457.9A CN114799729B (en) | 2022-03-18 | 2022-03-18 | Assembly tool and method for reinforcing back ring of cylinder liner of large-diameter low-speed diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210270457.9A CN114799729B (en) | 2022-03-18 | 2022-03-18 | Assembly tool and method for reinforcing back ring of cylinder liner of large-diameter low-speed diesel engine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114799729A CN114799729A (en) | 2022-07-29 |
| CN114799729B true CN114799729B (en) | 2024-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210270457.9A Active CN114799729B (en) | 2022-03-18 | 2022-03-18 | Assembly tool and method for reinforcing back ring of cylinder liner of large-diameter low-speed diesel engine |
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- 2022-03-18 CN CN202210270457.9A patent/CN114799729B/en active Active
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| CN114799729A (en) | 2022-07-29 |
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