CN112676824A - Centering tool for engine gear case and engine body - Google Patents
Centering tool for engine gear case and engine body Download PDFInfo
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- CN112676824A CN112676824A CN202011450763.8A CN202011450763A CN112676824A CN 112676824 A CN112676824 A CN 112676824A CN 202011450763 A CN202011450763 A CN 202011450763A CN 112676824 A CN112676824 A CN 112676824A
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- 238000003754 machining Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000006748 scratching Methods 0.000 description 1
- 230000002393 scratching effect Effects 0.000 description 1
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Abstract
The invention provides a centering tool for an engine gearbox and an engine body, which comprises a first supporting shaft, a second supporting shaft, a supporting plate frame and a pipe sleeve, wherein a through hole is formed in the middle of the supporting plate frame, the pipe sleeve is of a hollow cylindrical structure, the periphery of one end of a crankshaft and the periphery of the upper end of the pipe sleeve are both sleeved in the through hole, the periphery of the lower end of the pipe sleeve is sleeved in a main bearing hole of the gearbox, the first supporting shaft and the second supporting shaft are respectively installed at two ends of the supporting plate frame, the first supporting shaft and the second supporting shaft are arranged in parallel, and the lower end of the first supporting shaft and the lower end of the second supporting shaft. The use method of the invention can be used when the engine body is assembled with the gear box, can solve the positioning and installation errors of the split type gear box, can realize the centering of the gear box and the main bearing hole of the engine body without the combination processing and positioning pin holes, and is suitable for large-scale marine diesel engines and diesel engines with the coaxiality requirements of the split type gear box, the engine body and the flywheel housing.
Description
Technical Field
The invention belongs to the technical field of engines, and particularly relates to a centering tool for an engine gearbox and an engine body.
Background
The large marine diesel engine structure member mainly comprises a machine body, a cylinder cover, a crank connecting rod mechanism and a gas distribution transmission mechanism, wherein the transmission mechanism mainly has the function of driving each accessory pump to run so as to ensure the normal operation of the whole machine and mainly comprises a plurality of gears, a transmission mechanism gear train is fixedly arranged on a gear box, a crankshaft is arranged on a main bearing hole and is integrated with the crankshaft gear to drive each accessory gear to rotate, and necessary fuel oil, lubricating oil and a cooling system are provided for an engine. In order to meet the requirements of machine body processing manufacturability and whole machine compactness, the transmission mechanism separates the gear box from the machine body, and puts partial functions of the machine body on the gear box, such as a main oil gallery lubricating oil circuit and a lubricating oil pressure retaining valve. The gear box and the flywheel cover are separately suspended at the front end and the rear end of the machine body and fastened with the machine body through bolts. Taking a 20-cylinder diesel engine as an example, the length of a crankshaft of the diesel engine is long, so 2 gears of supports are required to be added on a gear box and a flywheel housing to support the crankshaft and improve the rotation rigidity of the crankshaft. The normal rotation of the crankshaft is guaranteed, and the risk of damage to parts caused by misalignment of the shaft holes is avoided. The existing design processing centering mode has two modes, the first mode is to process a positioning pin hole firstly and ensure the coaxiality by utilizing the precision of the positioning pin hole, and the second mode is to process the positioning pin hole afterwards, so that the gear box, the engine body, the flywheel housing, the supporting hole of the gear box, the engine body, the flywheel housing and the main bearing hole are combined and processed and then are matched and twisted with the positioning pin hole. For ensuring coaxiality.
The first centering method has the disadvantage that the coaxiality of the support hole and the main bearing is deviated due to the processing errors of the positioning pin and the machine tool. The second is that the support hole and the main bearing hole have high processing precision, but the interchangeability and the maintainability of the parts are poor.
Disclosure of Invention
In view of the above, the invention aims to provide a centering tool for an engine gearbox and an engine body, so as to solve the problems that coaxiality of a support hole and a main bearing in the prior art is deviated and applicability of mounting parts is poor.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides an engine gear case and organism centering frock, includes first support shaft, second support shaft, support plate rail and pipe box, and support plate rail middle part is equipped with the through-hole, and the pipe box is the hollow circular cylinder structure, and the one end periphery of bent axle and the upper end periphery of pipe box all cup joint extremely in the through-hole, the periphery of sleeve pipe lower extreme cup joints to gear box main bearing downthehole, and first support shaft and second support shaft are installed respectively to the both ends of support plate rail, and first support shaft and second support are parallel to each other and set up, and first support shaft lower extreme and second support shaft lower extreme are fixed connection respectively in two inertia shaft holes.
Furthermore, the pipe sleeve is made of ABS.
Further, the outer diameter of the pipe sleeve is the same as that of the crankshaft, and a gap is formed between the periphery of the pipe sleeve and the bearing inner ring.
Further, the first support shaft, the second support shaft and the support plate frame are of a machining integrated structure.
Compared with the prior art, the centering tool for the engine gearbox and the engine body has the following advantages:
(1) the centering tool for the engine gearbox and the engine body, disclosed by the invention, is used when the engine body and the gearbox are assembled, can solve the positioning and installation errors of the split type gearbox, can realize the centering of the gearbox and a main bearing hole of the engine body without combined machining and positioning pin holes, and is low in investment cost, simple and convenient to operate, simple and practical.
(2) The centering tool for the engine gear box and the engine body is suitable for large marine diesel engines and diesel engines with coaxiality requirements for split gear boxes, engine bodies and flywheel housings, and is wide in application scene and strong in adaptability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of an engine centering tool according to an embodiment of the invention.
Description of reference numerals:
1-a first support shaft; 2-a second support shaft; 3-supporting the plate frame; 4-pipe sleeve.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
An alignment tool in an alignment tool for an engine gearbox and an engine body is adaptively adjusted according to application scenes, and is an embodiment applied to a large marine diesel engine, as shown in fig. 1, the alignment tool comprises a first support shaft 1, a second support shaft 2, a support plate frame 3 and a pipe sleeve 4, a through hole is arranged in the middle of the support plate frame 3, the pipe sleeve 4 is of a hollow cylindrical structure, the periphery of one end of a crankshaft and the periphery of the upper end of the pipe sleeve 4 are both sleeved in the through hole, the periphery of the lower end of the pipe sleeve 4 is sleeved in a main bearing hole of the gearbox, the first support shaft 1 and the second support shaft 2 are respectively arranged at two ends of the support plate frame 3, the first support shaft 1 and the second support shaft 2 are arranged in parallel, the lower end of the first support shaft 1 and the lower end of the second support shaft 2 are respectively and fixedly connected into two inert shaft holes, the pipe sleeve 4 is made of ABS, a gap is formed between the periphery of the pipe sleeve 14 and the bearing inner ring, and the first support shaft 1, the second support shaft 2 and the support plate rack 3 are of a machining integrated structure.
A use method of a centering tool for an engine gearbox and an engine body comprises the following steps: s1, sleeving the periphery of the middle part of the alignment tool to the inner ring of the main bearing hole of the gear box; s2, sleeving a journal of the crankshaft extending out of the gear box to an inner ring of the alignment tool; s3, aligning the two ends of the alignment tool into the two inert shaft holes respectively; s4, locking two ends of the alignment tool into the two inert shaft holes respectively to finely adjust the concentricity of the crankshaft and the main bearing hole; s5, detaching the alignment tool; s6, assembling the front end of the engine crankshaft, the torsional vibration damper and the torsional vibration damper housing, wherein the centering tool and the inner ring of the main bearing hole of the gear box are in clearance fit in the step 1, the inner ring of the alignment tool and the crankshaft are provided with a fit clearance in the step 2, and the fit clearance is the same as the installation clearance of the crankshaft head and the torsional vibration damper.
The utility model provides an engine gear case and organism's centering frock theory of use: fig. 1 is a structure diagram of a tool, wherein a first support shaft 1 and a second support shaft 2 are support shafts of the tool, and the main function of the support shafts is to perform micro-adjustment on the tool, the first support shaft 1 and the second support shaft 2 are installed in an inert shaft hole of a gear box, and a pipe sleeve 4 is a gap adjusting shaft section of a support hole of the gear box and is used for adjusting the coaxiality of the support hole of the gear box and a main bearing hole of a machine body, and the gear box is fastened by bolts after the coaxiality is visually adjusted to a design value.
The design key points of centering frock: as shown in the engine centering tool in figure 1, the inner diameter of the pipe sleeve 4 needs to be matched with the outer diameter of a crankshaft extending out of a shaft section of a gear box, the pipe sleeve 4 needs to be made of engineering plastics to prevent the leading end of the tool from scratching the inner diameter of a bearing, the processing precision of the whole centering tool is not more than IT5 level, and the outer diameter of the pipe sleeve 4 needs to be consistent with the outer diameter of the crankshaft or the outer diameter of a torsional vibration damper and a crankshaft spigot.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. The utility model provides an engine gear case and centering frock of organism which characterized in that: counterpoint frock includes first support shaft (1), second support shaft (2), support plate rail (3) and pipe box (4), and support plate rail (3) middle part is equipped with the through-hole, and pipe box (4) are the hollow circular cylinder structure, and the one end periphery of bent axle and the upper end periphery of pipe box (4) all cup joint extremely in the through-hole, in the peripheral cup joint of sleeve pipe lower extreme was to the gear box base bearing hole, first support shaft (1) and second support shaft (2) were installed respectively to the both ends of support plate rail (3), and first support shaft (1) and second support mutual parallel arrangement, first support shaft (1) lower extreme and second support shaft (2) lower extreme are fixed connection respectively in two inert shaft holes.
2. The centering tool for the engine gearbox and the engine body as claimed in claim 1, wherein: the pipe sleeve (4) is made of ABS.
3. The centering tool for the engine gearbox and the engine body as claimed in claim 1, wherein: the outer diameter of the pipe sleeve (4) is the same as that of the crankshaft, and a gap is formed between the periphery of the pipe sleeve (4) and the bearing inner ring.
4. The centering tool for the engine gearbox and the engine body as claimed in claim 1, wherein: the first supporting shaft (1), the second supporting shaft (2) and the supporting disc rack (3) are of a machining integrated structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011450763.8A CN112676824A (en) | 2020-12-11 | 2020-12-11 | Centering tool for engine gear case and engine body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011450763.8A CN112676824A (en) | 2020-12-11 | 2020-12-11 | Centering tool for engine gear case and engine body |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112676824A true CN112676824A (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011450763.8A Pending CN112676824A (en) | 2020-12-11 | 2020-12-11 | Centering tool for engine gear case and engine body |
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| Country | Link |
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| CN (1) | CN112676824A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115476146A (en) * | 2022-09-28 | 2022-12-16 | 中国船舶集团有限公司第七一一研究所 | Mounting adjustment device and mounting adjustment method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2619416A1 (en) * | 2007-01-26 | 2008-07-26 | Snecma | Device for the assembly of two sets, for example for turbomachine stator |
| CN201632833U (en) * | 2010-03-25 | 2010-11-17 | 广西玉柴机器股份有限公司 | Device for ensuring assembly coaxiality of clutch component |
| CN103422928A (en) * | 2013-07-18 | 2013-12-04 | 东风朝阳朝柴动力有限公司 | Diesel engine timing locating method |
| CN205592355U (en) * | 2016-05-12 | 2016-09-21 | 广西玉柴机器股份有限公司 | Transmission structure of additional gear of split type bent axle |
| CN107953292A (en) * | 2017-12-27 | 2018-04-24 | 宁波美佳宁生物科技有限公司 | A kind of automobile engine crankshaft timing frock and crankshaft timing localization method |
| CN208083836U (en) * | 2018-02-28 | 2018-11-13 | 珠海保税区摩天宇航空发动机维修有限公司 | A kind of aero-engine gearbox drive shaft installation steering tool |
| CN111250974A (en) * | 2020-02-28 | 2020-06-09 | 广船国际有限公司 | Shafting centering method and centering tool for marine active equipment and marine passive equipment |
-
2020
- 2020-12-11 CN CN202011450763.8A patent/CN112676824A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2619416A1 (en) * | 2007-01-26 | 2008-07-26 | Snecma | Device for the assembly of two sets, for example for turbomachine stator |
| CN201632833U (en) * | 2010-03-25 | 2010-11-17 | 广西玉柴机器股份有限公司 | Device for ensuring assembly coaxiality of clutch component |
| CN103422928A (en) * | 2013-07-18 | 2013-12-04 | 东风朝阳朝柴动力有限公司 | Diesel engine timing locating method |
| CN205592355U (en) * | 2016-05-12 | 2016-09-21 | 广西玉柴机器股份有限公司 | Transmission structure of additional gear of split type bent axle |
| CN107953292A (en) * | 2017-12-27 | 2018-04-24 | 宁波美佳宁生物科技有限公司 | A kind of automobile engine crankshaft timing frock and crankshaft timing localization method |
| CN208083836U (en) * | 2018-02-28 | 2018-11-13 | 珠海保税区摩天宇航空发动机维修有限公司 | A kind of aero-engine gearbox drive shaft installation steering tool |
| CN111250974A (en) * | 2020-02-28 | 2020-06-09 | 广船国际有限公司 | Shafting centering method and centering tool for marine active equipment and marine passive equipment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115476146A (en) * | 2022-09-28 | 2022-12-16 | 中国船舶集团有限公司第七一一研究所 | Mounting adjustment device and mounting adjustment method |
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Application publication date: 20210420 |