CN112743291B - Repairing device on diesel engine main bearing seat ship and using method - Google Patents
Repairing device on diesel engine main bearing seat ship and using method Download PDFInfo
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- CN112743291B CN112743291B CN201911042251.5A CN201911042251A CN112743291B CN 112743291 B CN112743291 B CN 112743291B CN 201911042251 A CN201911042251 A CN 201911042251A CN 112743291 B CN112743291 B CN 112743291B
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- frame
- main bearing
- bearing seat
- tool rest
- journal
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- 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
- B23P6/00—Restoring or reconditioning objects
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D79/00—Methods, machines, or devices not covered elsewhere, for working metal by removal of material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
Abstract
The invention discloses a repairing device on a main bearing seat ship of a diesel engine and a using method thereof. The repairing device and the method can repair and process the inner hole of the main bearing seat of the crankshaft without disassembling the crankshaft, and the operations mainly comprise cutting and polishing abrasive machining so as to meet the specified roughness requirement.
Description
Technical Field
The invention relates to special maintenance equipment for a large-sized engine or a marine diesel engine, in particular to a shipboard repair device for a main bearing seat of the diesel engine and a using method thereof.
Background
The basic working principle of the diesel engine is that high-temperature and high-pressure gas generated by fuel oil combustion pushes a piston to move, and the reciprocating motion of the piston is converted into the rotary motion of a crankshaft through a connecting rod. The crankshaft is located on a main bearing of a diesel engine base; therefore, the impact force of the reciprocating motion of the piston and the gravity of the crankshaft are born by the main bearing and the bearing seat thereof and are transmitted to the main engine base and the hull structure. The main bearing belongs to a loss part, needs to be repaired and replaced regularly, and is convenient to disassemble; the main bearing seat belongs to a structural part and can not be detached basically after the main machine is manufactured.
In the actual operation process of the marine diesel engine, the main bearing seat still has a certain probability of deformation for various reasons, and needs to be repaired. In the manufacturing process of the diesel engine, the inner hole of the main bearing seat is machined before the crankshaft is seated; after the crankshaft is seated, the space around the main bearing seat is extremely narrow, and the inner hole of the crankshaft is extremely difficult to machine. Therefore, for repairing the main bearing seat of the diesel engine of the operating ship, a fault ship is often required to be driven into a repairing dock, and the crankshaft is detached by the aid of a gantry crane and then repaired. This increases unnecessary disassembly and reassembly and significantly increases repair costs.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide equipment for repairing and processing the inner hole of the main bearing seat of a large marine diesel engine on the premise of not disassembling a crankshaft.
The purpose of the invention is realized by adopting the following technical scheme:
a repairing device on a main bearing seat ship of a diesel engine comprises a frame, a tool rest, an adjusting mechanism, a positioning mechanism, a transmission mechanism and a power machine, wherein the tool rest, the adjusting mechanism and the positioning mechanism are arranged on the peripheral surface of the frame, a machining head is arranged on the tool rest, the tool rest is adjustably arranged between adjacent rib plates of the frame through the adjusting mechanism, the power machine drives the frame to rotate through the transmission mechanism, the frame is a spliced mechanism, a transmission wheel is arranged on the periphery of the frame, and the positioning mechanism is arranged between the peripheral surface of the frame and the transmission wheel.
Preferably, the power machine is a double-head output driving motor or an electric motor, the two driving wheels are oppositely arranged on two sides of the periphery of the frame, and the two transmission mechanisms are arranged between the two driving wheels and driving wheels at two ends of the double-head output driving motor or the electric motor.
Preferably, the transmission mechanism is a chain or a synchronous belt, and the transmission wheel is a chain wheel or a synchronous belt wheel.
Preferably, the adjusting mechanism is a lead screw assembly.
Preferably, the positioning mechanism is a wear-resistant soft positioning block with a smooth surface.
Preferably, two side surfaces of the tool rest are provided with sliding protrusions, and guide sliding grooves matched with the sliding protrusions are formed in the adjacent surfaces of the frame rib plates adjacent to the two side surfaces.
Preferably, the processing head is a cutting tool or a polishing abrasive skin.
Preferably, the cylindrical frame is of a half-butt type.
The use method of the repair device comprises the following steps:
(1) dismantling an upper bearing bush and a lower bearing bush in a target repaired main bearing seat, measuring gaps of all gears between the main bearing seat and a crankshaft journal, and determining the deformation of the main bearing seat and the processing amount during repair;
(2) cleaning the crankshaft journal and the inner surface of a main bearing seat, firstly reversely buckling the lower half part of a frame on the upper part of the journal, then rolling into the lower space of the journal along the gap between the journal and the main bearing seat, then buckling the upper half part of the frame on the upper part of the journal, connecting the two parts of the frame and fixing by using hexagon socket head cap bolts, and connecting a driving wheel and a power machine on the frame by using a chain or a synchronous belt;
(3) adjusting the height and position of the positioning mechanism to keep the rotation center of the frame consistent with the center of the crankshaft;
(4) adjusting the position of the tool rest to enable the tool rest to be flush with the edge of the surface to be machined; installing a cutting tool and adjusting the clamping height of the cutting tool to ensure that the machining tool consumption meets the technical requirements;
(5) starting a power machine, and driving the frame to rotate through a chain or a synchronous belt, so that the cutting tool starts to cut the main bearing seat; after a circle of processing, the left and right positions of the tool rest are adjusted through a lead screw; continuing to process until the surface of the inner hole of the main bearing seat is processed;
(6) repeating the steps (4) and (5) until the final machining amount of the inner hole of the main bearing meets the requirement of the step (1);
(7) replacing a cutting tool with a polishing sand skin, and polishing the surface of the inner hole of the main bearing seat of the diesel engine after processing to the specified roughness requirement;
(8) after the machining is finished, the dismounting device firstly demounts the machining head, the chain or the synchronous belt, the lead screw and the tool rest, then adjusts the angle of the frame, enables the butt joint surfaces of the two half structures to be horizontally placed, demounts the driving wheel, demounts the lower half frame and finally demounts the upper half frame.
In view of the space characteristics around the main bearing seat of the diesel engine and the working principle of the repair tool, the tool is designed to have the following characteristics:
the frame should be in two halves. When the crankshaft journal is installed, the lower half part of the frame is reversely buckled on a crankshaft journal, and then the crankshaft journal rolls into a lower space of the journal along a gap between the journal and a main bearing seat; then buckling the upper half part of the frame on the upper part of the shaft neck; the two parts of the frame are connected and fixed by bolts.
Compared with the prior art, the invention has the beneficial effects that: the device solves the problem that the crankshaft must be dismantled when the main bearing seat of the diesel engine is repaired on the ship in the prior art. Through the special design suitable for the surrounding space of the main bearing seat, the influence of the crankshaft on the installation of a machining and repairing tool in place is perfectly avoided. Thereby avoiding unnecessary disassembly and assembly workload and greatly reducing construction risk, period and cost.
Drawings
FIG. 1 is a schematic view of the space around the main bearing seat of a diesel engine with a crankshaft in place;
FIG. 2 is a schematic view of the construction of a repair device on a main bearing housing vessel;
FIG. 3 is a schematic view of another angle of the main bearing housing shipboard repair device;
FIG. 4 is a partial view of the tool holder;
fig. 5 is a partial view of the positioning device.
In the figure: 1. a frame; 2. a tool holder; 3. an adjustment mechanism; 4. a positioning mechanism; 5. a transmission mechanism; 6. a power machine; 7. a driving wheel; 8. a machining head; 9. a rib plate.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1-5, the device for repairing a main bearing seat ship of a diesel engine comprises a frame 1, a tool rest 2, an adjusting mechanism 3, a positioning mechanism 4, a transmission mechanism 5 and a power machine 6, wherein the tool rest 2, the adjusting mechanism 3 and the positioning mechanism 4 are arranged on the outer peripheral surface of the frame 1, a processing head 8 is arranged on the tool rest 2, the tool rest 2 is adjustably arranged between adjacent rib plates 9 of the frame through the adjusting mechanism 3, the power machine 6 drives the frame 1 to rotate through the transmission mechanism 5, the frame 1 is a split mounting type mechanism, a transmission wheel 7 is arranged on the outer periphery of the frame 1, and the positioning mechanism 4 is arranged between the outer peripheral surface of the frame 1 and the transmission wheel 7.
Wherein the frame 1 is a two-half butt type cylindrical structure. The rib 9 is detachably provided on the cylindrical outer peripheral surface in a radially surrounding manner.
Two side surfaces of the tool rest 2 are provided with sliding projections, and the adjacent surfaces of the frame ribbed plates 9 adjacent to the two side surfaces are provided with guide sliding grooves matched with the sliding projections.
The adjusting mechanism 3 is a lead screw assembly. The machining position of the machining head 8 is adjusted by adjusting the position of the lead screw.
The positioning mechanism 4 is a wear-resistant soft positioning block with a smooth surface.
The transmission mechanism 5 is a chain or a synchronous belt, and the transmission wheel 7 is a chain wheel or a synchronous belt wheel.
The power machine 6 is a double-head output driving motor or an electric motor, the two driving wheels 7 are oppositely arranged on two sides of the periphery of the frame 1, and the two transmission mechanisms 5 are arranged between the two driving wheels 7 and driving wheels at two ends of the double-head output driving motor or the electric motor.
The processing head 8 is a cutting tool or polishing abrasive skin. The processing head 8 is detachably arranged on the tool rest 2, the processing head 8 moves along with the tool rest 2 in the radial direction of the frame 1, and the frame 1 of the processing head 8 rotates around the axial lead of the frame.
Wherein the ribs 9 of the frame 1, the tool holder 2, the lead screw and the chain wheel and chain should all be rather thin. Taking the model S90ME-C9.2 as an example, the inner diameter of the main bearing seat after being processed is as high as 1224mm, but the radial clearance a between the main bearing seat and the crankshaft is only 22mm, and the axial clearance B is only 32mm, see fig. 1. The thickness of the components should therefore be below the gap to ensure proper operation of the tool.
The clamping height of the cutter or the sand on the cutter frame is adjustable and has higher precision. Because the requirement on the processing dimensional accuracy of the bore diameter of the main bearing bore is high, taking an S90ME-C9.2 model as an example, the tolerance zone of the inner diameter of the processed main bearing seat is only 0 to +0.06mm. Therefore, the clamping height of the cutter or the sand on the cutter frame should have the corresponding adjusting precision.
The positioning mechanism should be a smooth, wear resistant, soft material. The positioning mechanism in the device needs to hold the crankshaft journal tightly so as to achieve the centering and positioning effects. So that it will slide relative to the crankshaft journal during operation of the device. Therefore, the positioning mechanism should be smooth to reduce friction during operation, wear resistant to ensure accuracy during operation, and soft to avoid damage to the journal.
The use method of the repair device comprises the following steps:
(1) dismantling an upper bearing bush and a lower bearing bush in a target repaired main bearing seat, measuring gaps of all gears between the main bearing seat and a crankshaft journal, and determining the deformation of the main bearing seat and the processing amount during repair;
(2) cleaning the crankshaft journal and the inner surface of a main bearing seat, firstly, reversely buckling the lower half part of a frame on the upper part of the journal, then rolling into the lower space of the journal along the gap between the journal and the main bearing seat, then buckling the upper half part of the frame on the upper part of the journal, connecting the two parts of the frame and fixing the two parts by using hexagon socket head bolts, and connecting a driving wheel and a power machine on the frame by using a chain or a synchronous belt;
(3) adjusting the height and position of the positioning mechanism to keep the rotation center of the frame consistent with the center of the crankshaft;
(4) adjusting the position of the tool rest to enable the tool rest to be flush with the edge of the surface to be processed; installing a cutting tool and adjusting the clamping height of the cutting tool to ensure that the machining tool consumption meets the technical requirements;
(5) starting a power machine, and driving the frame to rotate through a chain or a synchronous belt, so that the cutting tool starts to cut the main bearing seat; after a circle of processing, the left and right positions of the tool rest are adjusted through a lead screw; continuing to process until the surface of the inner hole of the whole main bearing seat is processed;
(6) repeating the steps (4) and (5) until the final machining amount of the inner hole of the main bearing meets the requirement of the step (1);
(7) replacing a cutting tool with a polishing sand skin, and polishing the surface of the inner hole of the main bearing seat of the diesel engine after processing to the specified roughness requirement;
(8) after the machining is finished, the dismounting device firstly demounts the machining head, the chain or the synchronous belt, the lead screw and the tool rest, then adjusts the angle of the frame, enables the butt joint surfaces of the two half structures to be horizontally placed, demounts the driving wheel, demounts the lower half frame and finally demounts the upper half frame.
In summary, the following operations can be performed by using the repair device and the method:
(1) And installing a cutting tool, and processing the hole diameter of the inner hole of the main bearing of the diesel engine with deformation to the specified size requirement.
(2) And installing polishing sand skin, and polishing the surface of the machined or rusted inner hole of the main bearing seat of the diesel engine to the specified roughness requirement.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A use method of a shipboard repair device for a main bearing seat of a diesel engine comprises a frame (1), a tool rest (2), an adjusting mechanism (3), a positioning mechanism (4), a transmission mechanism (5) and a power machine (6), wherein the tool rest (2), the adjusting mechanism (3) and the positioning mechanism (4) are arranged on the outer peripheral surface of the frame (1), a machining head (8) is arranged on the tool rest (2), the tool rest (2) is adjustably arranged between adjacent frame rib plates (9) through the adjusting mechanism (3), the power machine (6) drives the frame (1) to rotate through the transmission mechanism (5), the frame (1) is an assembled mechanism, a transmission wheel (7) is arranged on the outer periphery of the frame (1), and the positioning mechanism (4) is arranged between the outer peripheral surface of the frame (1) and the transmission wheel (7); the method is characterized by comprising the following steps:
(1) dismantling an upper bearing bush and a lower bearing bush in a target repaired main bearing seat, measuring gaps of all gears between the main bearing seat and a crankshaft journal, and determining the deformation of the main bearing seat and the processing amount during repair;
(2) cleaning the crankshaft journal and the inner surface of a main bearing seat, firstly, reversely buckling the lower half part of a frame on the upper part of the journal, then rolling into the lower space of the journal along the gap between the journal and the main bearing seat, then buckling the upper half part of the frame on the upper part of the journal, connecting the two parts of the frame and fixing the two parts by using hexagon socket head bolts, and connecting a driving wheel and a power machine on the frame by using a chain or a synchronous belt;
(3) adjusting the height and position of the positioning mechanism to keep the rotation center of the frame consistent with the center of the crankshaft;
(4) adjusting the position of the tool rest to enable the tool rest to be flush with the edge of the surface to be processed; installing a cutting tool and adjusting the clamping height of the cutting tool to ensure that the machining tool depth meets the technical requirements;
(5) starting a power machine, and driving the frame to rotate through a chain or a synchronous belt, so that the cutting tool starts to cut the main bearing seat; after a circle of processing, the left and right positions of the tool rest are adjusted through a lead screw; continuing to process until the surface of the inner hole of the whole main bearing seat is processed;
(6) repeating the steps (4) and (5) until the final machining amount of the inner hole of the main bearing meets the requirement of the step (1);
(7) replacing a cutting tool with a polishing sand skin, and polishing the surface of the inner hole of the main bearing seat of the diesel engine after processing to the specified roughness requirement;
(8) after the machining is finished, the dismounting device firstly demounts the machining head, the chain or the synchronous belt, the lead screw and the tool rest, then adjusts the angle of the frame, enables the butt joint surfaces of the two half structures to be horizontally placed, demounts the driving wheel, demounts the lower half frame and finally demounts the upper half frame.
2. Use according to claim 1, characterized in that: the power machine (6) is a double-head output driving motor or an electric motor, the two driving wheels (7) are oppositely arranged on two sides of the periphery of the frame (1), and the two transmission mechanisms (5) are arranged between the two driving wheels (7) and driving wheels at two ends of the double-head output driving motor or the electric motor.
3. Use according to claim 1 or 2, characterized in that: the transmission mechanism (5) is a chain or a synchronous belt, and the transmission wheel (7) is a chain wheel or a synchronous belt wheel.
4. Use according to claim 1 or 2, characterized in that: the adjusting mechanism (3) is a screw assembly.
5. Use according to claim 1 or 2, characterized in that: the positioning mechanism (4) is a wear-resistant soft positioning block with a smooth surface.
6. Use according to claim 1 or 2, characterized in that: two side surfaces of the tool rest (2) are provided with sliding protrusions, and the adjacent surfaces of the frame ribbed plates (9) adjacent to the two side surfaces are provided with guide sliding grooves matched with the sliding protrusions.
7. Use according to claim 1 or 2, characterized in that: the processing head (8) is a cutting tool or a polishing abrasive sheet.
8. Use according to claim 1 or 2, characterized in that: the cylindrical frame (1) is in a two-half butt joint type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911042251.5A CN112743291B (en) | 2019-10-30 | 2019-10-30 | Repairing device on diesel engine main bearing seat ship and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911042251.5A CN112743291B (en) | 2019-10-30 | 2019-10-30 | Repairing device on diesel engine main bearing seat ship and using method |
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| Publication Number | Publication Date |
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| CN112743291A CN112743291A (en) | 2021-05-04 |
| CN112743291B true CN112743291B (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911042251.5A Active CN112743291B (en) | 2019-10-30 | 2019-10-30 | Repairing device on diesel engine main bearing seat ship and using method |
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Citations (7)
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| CH306719A (en) * | 1952-12-31 | 1955-04-30 | Ernst Edouard | Machine for grinding cylindrical surfaces of rotating members. |
| FR1272684A (en) * | 1960-10-18 | 1961-09-29 | Device for working crankshaft pins, in particular for turning and rectifying them | |
| GB1051607A (en) * | 1964-02-18 | 1966-12-14 | Knut Golten | Grinding machine for crank shaft journal |
| CN101448593A (en) * | 2006-05-26 | 2009-06-03 | 奈尔斯-西蒙斯工业设备有限责任公司 | Method of machining the bearing seats of the main and rod bearings of crankshafts |
| CN201769025U (en) * | 2010-06-11 | 2011-03-23 | 沪东重机有限公司 | Bearing pedestal trimming device for large-scale marine diesel |
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Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008046642B3 (en) * | 2008-09-10 | 2009-12-24 | Man Diesel, Filial Af Man Diesel Se, Tyskland | Apparatus and method for processing a bearing seat or a bearing journal mounted therein |
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2019
- 2019-10-30 CN CN201911042251.5A patent/CN112743291B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH306719A (en) * | 1952-12-31 | 1955-04-30 | Ernst Edouard | Machine for grinding cylindrical surfaces of rotating members. |
| FR1272684A (en) * | 1960-10-18 | 1961-09-29 | Device for working crankshaft pins, in particular for turning and rectifying them | |
| GB1051607A (en) * | 1964-02-18 | 1966-12-14 | Knut Golten | Grinding machine for crank shaft journal |
| CN101448593A (en) * | 2006-05-26 | 2009-06-03 | 奈尔斯-西蒙斯工业设备有限责任公司 | Method of machining the bearing seats of the main and rod bearings of crankshafts |
| CN201769025U (en) * | 2010-06-11 | 2011-03-23 | 沪东重机有限公司 | Bearing pedestal trimming device for large-scale marine diesel |
| CN105666268A (en) * | 2016-01-20 | 2016-06-15 | 沈阳理工大学 | In-position axle part repairing device |
| CN206185182U (en) * | 2016-08-31 | 2017-05-24 | 武汉中海荣特焊科技有限公司 | A online prosthetic devices for standing grind wearing and tearing of rocking arm bearing frame |
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| Title |
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