CN114215668B - Layout method for controlling air pipeline by marine diesel engine - Google Patents
Layout method for controlling air pipeline by marine diesel engine Download PDFInfo
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- CN114215668B CN114215668B CN202111439405.1A CN202111439405A CN114215668B CN 114215668 B CN114215668 B CN 114215668B CN 202111439405 A CN202111439405 A CN 202111439405A CN 114215668 B CN114215668 B CN 114215668B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M35/00—Combustion-air cleaners, air intakes, intake silencers, or induction systems specially adapted for, or arranged on, internal-combustion engines
- F02M35/10—Air intakes; Induction systems
- F02M35/10091—Air intakes; Induction systems characterised by details of intake ducts: shapes; connections; arrangements
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Abstract
The layout method of the marine diesel engine control air pipeline determines the position size and the key space trend of each space interface according to the space position and the size relation of an air distributor, a connecting block and a cylinder interface board in a three-dimensional digital-analog environment, realizes the layout design without interference in the overall relation form, meets the logic relation arrangement requirement of control air pipes, has reasonable and attractive layout of control pipes, reduces the waste of materials in the manufacturing link, plans overall production, shortens the production preparation time, improves the manufacturing efficiency, reduces the cost in the overall manufacturing process, has good pipe bending quality and consistency, and reduces the technical level requirement on operators.
Description
Technical Field
The invention belongs to the technical field of marine diesel engine piping design, and particularly relates to a layout method of a marine diesel engine control air pipeline.
Background
The marine high-power diesel engine is started by adopting compressed air, namely the compressed air enters an air distributor, the distributor is sequentially sent into an air cylinder in a working stroke through an air cylinder starting valve according to the ignition sequence of the diesel engine to push a piston to drive a crankshaft to rotate, and when the crankshaft reaches a limited rotating speed, fuel sprayed into a combustion chamber can be automatically ignited and combusted, so that the diesel engine can normally run; in the whole process, the compressed air enters the air distributor, and the sequence of the main compressed air entering the air cylinders is determined by the control air pipe, so that the diesel engine is started.
Taking an eight-cylinder diesel engine as an example, the air distributor, the connecting block and the air distributor are required to be arrangedThe cylinder connector, the heat shield bottom plate and other parts are connected by adopting pipe fittings, and spatial structure relations exist among the parts, wherein the air distributor is provided with nine air pipe connectors, one air inlet pipe connector is arranged in the middle of the air distributor, and the air inlet pipe connectors and other eight connectors are used for connecting control air pipes, so that no spatial cross relation exists; the interfaces of the air distributor are respectively positioned at the upper, lower, left and right sides of the air distributor, each side is respectively provided with two interfaces, and the control air pipe fittings are arranged at the moment and have the same structure
The arrangement method has more design methods, and the design mode of controlling the air pipeline by the high-power diesel engine in the manufacturing industry of the marine diesel engine has the following two schemes through the research on domestic same lines; the first scheme comprises the following steps: designing interfaces at two ends and a space structure of each pipe fitting according to the interface of each pipe fitting on the diesel engine, wherein the design process needs to be calculated through a large amount of data and is used for checking the space interference state of each pipe fitting; when the pipe fittings are designed independently, the spatial trend and layout of the pipe fittings are not strongly correlated with spatial molded lines formed by other pipe fittings, so that the compactness formed on a diesel engine after the pipe is manufactured and installed is poor, and the integral layout is not attractive; scheme II: according to the actual installation environment, a sample tube is manufactured, and after the simulation assembly verification, the design of the drawing is performed reversely, so that the method has the advantages that the design drawing does not need to calculate a large number of interference parts, the design period is shortened, and the design drawing can be completed only by surveying and mapping the size of the sample tube; the layout of the existing control air pipeline mostly adopts a scheme of a second sample pipe reverse design drawing, but the manufacturing of the sample pipes is gradually completed by comparison, bending, correction, re-bending, verification and other steps, and is completed by continuous work, so that the bending of the sample pipes is only functional, and the aspects of the appearance quality of the pipe fittings, the attractiveness of the overall layout and the like cannot be effectively controlled; the reverse design drawing of the sample tube is influenced by the measurement precision of the space coordinate, the accuracy is poor, the bending of the distribution pipeline cannot be horizontal and vertical, and the appearance of the pipe fitting is poor in attractiveness; the requirement of the logical sequence of the pipeline on the skill of an operator is high, the pipe fitting cannot be bent in a numerical control manner, and the pipe fitting manufactured according to the sample pipe also needs to be repaired on site.
Therefore, the method of designing the drawing by adopting the sample tube in the reverse direction requires high skill of operators and poor technical capability transmissibility, and is not beneficial to digital production; the distributed pipeline bending data is difficult to record and is not beneficial to information sharing; the proportion of accidental errors of the on-site piping is too large, so that the consistency of the pipe fittings is difficult to realize, and the overall appearance quality of the diesel engine is influenced; the time for pipe fitting is too long, which affects the whole production cycle of the diesel engine; meanwhile, the direction of the pipeline is random, the phenomena of staggered pipeline spaces, unparallel pipeline in the same-direction space and staggered height are easy to occur, the pipeline space is random in turning position, and a plurality of pipes Lu Bu are arranged behind to form a staggered and disordered shape, so that the whole attractiveness formed by a pipe fitting design is poor. The appearance quality state of the diesel engine is seriously affected, and in conclusion, improvement is needed to solve the problems.
Disclosure of Invention
The technical problems solved by the invention are as follows: the layout method of the marine diesel engine control air pipeline determines the position size and the key space trend of each space interface according to the space position and the size relation of an air distributor, a connecting block and a cylinder interface board in a three-dimensional digital-analog environment, realizes the layout design without interference in the overall relation form, meets the logic relation arrangement requirement of control air pipes, has reasonable and attractive layout of control pipes, reduces the waste of materials in the manufacturing link, plans overall production, shortens the production preparation time, improves the manufacturing efficiency, reduces the cost in the overall manufacturing process, has good pipe bending quality and consistency, and reduces the technical level requirement on operators.
The technical scheme adopted by the invention is as follows: the layout method of the marine diesel engine control air pipeline comprises the following steps:
1) Establishing a three-dimensional model of the air distributor, the connecting block and the cylinder interface plate according to the spatial position and size relationship of the cylinder interfaces on the on-site air distributor, the connecting block and the cylinder interface plate;
2) The air distributor is provided with nine interfaces, wherein the interface in the middle of the air distributor is an air inlet pipe interface, the four upper, lower, left and right surfaces of the air distributor are respectively provided with an interface which is communicated with the air inlet pipe interface and has the same pipe orifice size, and the eight interfaces are respectively a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface and an eighth interface; according to the position relation of the air distributor and the connecting block, the positions of eight interfaces on the upper surface, the lower surface, the left surface and the right surface of the air distributor are distributed, the interfaces on the upper end wall surface of the air distributor are a fourth interface and a seventh interface from left to right, the interfaces on the left side wall surface of the air distributor are a first interface and a third interface from top to bottom, the interfaces on the lower end wall surface of the air distributor are a second interface and a fifth interface from left to right, and the interfaces on the right end wall surface of the air distributor are a sixth interface and an eighth interface from top to bottom;
3) According to the space size relation between the air distributor and the connecting block in the three-dimensional model, eight distributing pipes connected with the interfaces on the upper surface, the lower surface, the left surface and the right surface of the air distributor are bent by adopting a step bending method, wherein the eight distributing pipes comprise a first distributing pipe, a second distributing pipe, a third distributing pipe, a fourth distributing pipe, a fifth distributing pipe, a sixth distributing pipe, a seventh distributing pipe and an eighth distributing pipe; the first straight line segment lengths of the joints of the fourth interface, the first interface, the second interface and the sixth interface are the same, and the first straight line segment lengths of the fourth distribution pipe, the first distribution pipe, the second distribution pipe and the sixth distribution pipe are larger than those of the seventh distribution pipe, the third distribution pipe, the fifth distribution pipe and the eighth distribution pipe;
4) Eight distribution pipes are bent along a first straight line segment to the direction of the connecting block and then form a square annular structure on the periphery of the air distributor, and the four distribution pipes, the first distribution pipes, the second distribution pipes and the six distribution pipes are respectively positioned at the front sides of the seven distribution pipes, the third distribution pipes and the fifth distribution pipes and the eight distribution pipes, and form two rows of pipelines with front rows sequentially being the four distribution pipes from left to right, the first distribution pipes, the second distribution pipes and the six distribution pipes and back rows sequentially being the seven distribution pipes from left to right, the third distribution pipes, the fifth distribution pipes and the eight distribution pipes on the same side of the connecting block and the eight distribution pipes are bent again according to a step bending method, so that a distance of at least one pipe diameter is reserved between the two adjacent distribution pipes after the front distribution pipes and the back rows of distribution pipes are bent, the front distribution pipes and the back rows of distribution pipes are sequentially and alternately distributed at intervals and then are communicated with a left connecting port corresponding to the left side of the connecting block, namely the eight distribution pipes are sequentially from bottom to top;
5) Eight right connectors which are respectively communicated with a left connector connected with a first distribution pipe, a third distribution pipe, a second distribution pipe, a fifth distribution pipe, a sixth distribution pipe, an eighth distribution pipe, a fourth distribution pipe and a seventh distribution pipe are sequentially arranged on the right side wall of the connecting block from bottom to top, eight cylinder pipes positioned on the right side of the connecting block are arranged according to a left-right two-row four-per-row distribution mode, wherein the eight cylinder pipes comprise a first cylinder pipe, a second cylinder pipe, a third cylinder pipe, a fourth cylinder pipe, a fifth cylinder pipe, a sixth cylinder pipe, a seventh cylinder pipe and an eighth cylinder pipe, the first cylinder pipe, the second cylinder pipe, the fourth cylinder pipe and the seventh cylinder pipe are sequentially distributed from front to back and then are arranged in a right row, the third cylinder pipe, the fifth cylinder pipe, the sixth cylinder pipe and the eighth cylinder pipe are sequentially distributed from front to back to form a left row, and the ends of the straight line sections formed by bending the lower ends of the first cylinder pipe, the third cylinder pipe, the second cylinder pipe, the fifth cylinder pipe, the sixth cylinder pipe, the eighth cylinder pipe, the fourth cylinder pipe and the seventh cylinder pipe are sequentially and correspondingly connected with eight right connectors on the right side wall of the connecting block from bottom to top, so that the first distribution pipe and the first cylinder pipe, the third distribution pipe and the third cylinder pipe, the second distribution pipe and the second cylinder pipe, the fifth distribution pipe and the fifth cylinder pipe, the sixth distribution pipe and the sixth cylinder pipe, the eighth distribution pipe and the eighth cylinder pipe, the fourth distribution pipe and the fourth cylinder pipe, and the seventh distribution pipe and the seventh cylinder pipe are in one-to-one correspondence and communicated from bottom to top through the connecting plate;
6) According to the spatial position and size relation of a connecting block and a cylinder interface board in a three-dimensional model, two rows of cylinder pipes distributed on the left and right of a vertical section extend to the bottom position of the front end of a heat shield bottom plate along the Z-axis direction, the two rows of cylinder pipes extend to the middle position of the width of the heat shield bottom plate along the Y-axis after being bent at right angles for the first time, at the moment, the right row of cylinder pipes are arranged above and the left row of cylinder pipes are arranged below, the two rows of cylinder pipes extend to the rear end of the heat shield bottom plate along the X-axis direction parallel to the length direction of the heat shield bottom plate after being bent for the second time, and the two rows of cylinder pipes are bent for two times in the process of extending to the rear end of the heat shield bottom plate, so that eight cylinder pipes, seven cylinder pipes, six cylinder pipes, five cylinder pipes, four cylinder pipes, three cylinder pipes, two cylinder pipes and one cylinder pipe are connected with corresponding cylinder interfaces on cylinders after being led out from the front end to the rear end of the heat shield bottom plate.
In the step 2), the first straight line lengths of the fourth distribution pipe, the first distribution pipe, the second distribution pipe and the sixth distribution pipe are at least greater than one pipe diameter of the first straight line lengths of the seventh distribution pipe, the third distribution pipe, the fifth distribution pipe and the eighth distribution pipe.
In the step 2), the tube serial numbers of the eight distribution tubes correspond to the interface serial numbers on the upper, lower, left and right surfaces of the air distributor one by one.
Compared with the prior art, the invention has the advantages that:
1. the technical scheme introduces an integrated design mode to design the layout of the control air pipeline, under a three-dimensional modeling environment, the overall layout of the pipeline is changed into a single-pipe-piece space bending mode, the design idea of integral planning and gradual refinement is adopted, and when the position size of each space interface and the space trend of the pipe piece are determined through the digital-analog assembly relation of parts such as an air distributor, a connecting block, a cylinder interface board and the like, the possibility of interference of other parts is avoided, and the layout design mode of the integral pipeline form is realized;
2. the technical scheme reversely deduces and arranges the logical relationship of a plurality of distribution pipes and cylinder pipes, so that the connecting blocks are used as inflection points for adjusting the logical change of the pipeline sequencing, the air distribution pipes and the cylinder pipes are strictly arranged according to the logical relationship when the air distribution pipes and the cylinder pipes are spatially sequenced, and a single-plane step type pipe bending method is introduced when the distribution pipes and the cylinder pipes are spatially bent, so that the change of the positions of the distribution pipes and the cylinder pipes according to the logical relationship is realized, the regular and compact distribution in the pipeline space is ensured, and the attractiveness and the bearing of the technical capability are improved;
3. in the technical scheme, the pipeline direction can be changed correspondingly according to the change of the scheme under the digital-analog environment of the diesel engine, various scheme forms can be visually displayed, the comparison and the adjustment are convenient, the optimization scheme is more perfect, and the design and the planning of the pipeline are more beautiful;
4. the appearance quality of the pipe fitting is changed by the technical scheme so as to be improved: the numerical control bending pipe fitting has the characteristics of good bending quality and consistency, bending and integral assembly are carried out according to design requirements, pipe fitting direction conversion among multiple planes is realized, the pipe fitting arrangement is horizontal, flat and vertical, transition is smooth, attractiveness is good, process parameters of numerical control bending of the pipe fitting can be formed, and a full-period digital file of the pipe fitting is formed.
Drawings
FIG. 1 is a schematic diagram of the present invention controlling the connection of an air line;
FIG. 2 is a schematic diagram of the controlled air line component distribution connection of the present invention;
FIG. 3 is a schematic structural diagram of the joints of eight cylinder pipes and a cylinder interface plate according to the present invention.
Detailed Description
In the following, an embodiment of the present invention will be described in conjunction with fig. 1 to 3, so as to clearly and completely describe the technical solution, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, not the whole embodiment.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
The layout method of the marine diesel engine control air pipeline comprises the following steps:
1) Establishing a three-dimensional model of the air distributor 1, the connecting block 2 and the cylinder interface board 3 according to the spatial position and size relationship of the cylinder interfaces on the on-site air distributor 1, the connecting block 2 and the cylinder interface board 3;
2) The air distributor 1 with nine interfaces is adopted, wherein the interface in the middle of the air distributor 1 is an air inlet pipe interface, the four upper, lower, left and right surfaces of the air distributor 1 are respectively provided with an interface which is communicated with the air inlet pipe interface and has the same pipe orifice size, and the eight interfaces are respectively a first interface 21, a second interface 22, a third interface 23, a fourth interface 24, a fifth interface 25, a sixth interface 26, a seventh interface 27 and an eighth interface 28; according to the position relation of the air distributor 1 and the connecting block 2, the positions of eight interfaces on the upper face, the lower face, the left face and the right face of the air distributor 1 are distributed, the interfaces on the wall face of the upper end of the air distributor 1 are a fourth interface 24 and a seventh interface 27 from left to right, the interfaces on the wall face of the left side of the air distributor 1 are a first interface 21 and a third interface 23 from top to bottom, the interfaces on the wall face of the lower end of the air distributor 1 are a second interface 22 and a fifth interface 25 from left to right, and the interfaces on the wall face of the right end of the air distributor 1 are a sixth interface 26 and an eighth interface 28 from top to bottom; specifically, the first straight line segment length of the fourth distribution pipe 7, the first distribution pipe 4, the second distribution pipe 5 and the sixth distribution pipe 9 is greater than one pipe diameter of the first straight line segment length of the seventh distribution pipe 10, the third distribution pipe 6, the fifth distribution pipe 8 and the eighth distribution pipe 11; in the technical characteristics, the serial numbers of the interfaces on the air distributor 1 are correspondingly communicated with the serial numbers of the connectors on the cylinder interface board 3 through the connecting block 2 one by numbering the interfaces on the air distributor 1, so that the correct logical relation of the triggering sequence of the control air pipes is ensured;
3) According to the space size relation between the air distributor 1 and the connecting block 2 in the three-dimensional model, eight distributing pipes connected with the interfaces on the upper, lower, left and right surfaces of the air distributor 1 are bent by adopting a stepped bending method, wherein the eight distributing pipes comprise a first distributing pipe 4, a second distributing pipe 5, a third distributing pipe 6, a fourth distributing pipe 7, a fifth distributing pipe 8, a sixth distributing pipe 9, a seventh distributing pipe 10 and an eighth distributing pipe 11; the first straight line lengths of the joints of the seventh distribution pipe 10, the third distribution pipe 6, the fifth distribution pipe 8 and the eighth distribution pipe 11 and the seventh interface 27, the third interface 23, the fifth interface 25 and the eighth interface 28 are the same, the first straight line lengths of the joints of the fourth distribution pipe 7, the first distribution pipe 4, the second distribution pipe 5 and the sixth distribution pipe 9 and the fourth interface 24, the first interface 21, the second interface 22 and the sixth interface 26 are the same, and the first straight line lengths of the fourth distribution pipe 7, the first distribution pipe 4, the second distribution pipe 5 and the sixth distribution pipe 9 are larger than the first straight line lengths of the seventh distribution pipe 10, the third distribution pipe 6, the fifth distribution pipe 8 and the eighth distribution pipe 11; specifically, the pipe sequence numbers of the eight distribution pipes correspond to the interface sequence numbers on the upper, lower, left and right surfaces of the air distributor 1 one by one;
4) Eight distribution pipes are bent along a first straight line segment to the direction of the connecting block 2, then a square annular structure is formed on the periphery of the air distributor 1, a fourth distribution pipe 7, a first distribution pipe 4, a second distribution pipe 5 and a sixth distribution pipe 9 are respectively positioned on the front sides of a seventh distribution pipe 10, a third distribution pipe 6, a fifth distribution pipe 8 and an eighth distribution pipe 11, two rows of pipelines of the fourth distribution pipe 7, the first distribution pipe 4, the second distribution pipe 5, the sixth distribution pipe 9 and the rear distribution pipe 11 are formed outside the same side of the connecting block 2 and the air distributor 1, the four rows of pipelines are sequentially arranged from left to right, the seventh distribution pipe 10, the third distribution pipe 6, the fifth distribution pipe 8 and the eighth distribution pipe 11 are sequentially arranged from left to right, the distribution pipes are horizontally and vertically arranged in space, the disorderly staggered distribution phenomenon does not occur, the eight distribution pipes are bent again according to a step bending method, at least one pipe diameter distance is reserved between two adjacent distribution pipes after the front row and rear row of distribution pipes are bent, so that the front row and rear row of distribution pipes are sequentially distributed at intervals, the distribution pipes are sequentially connected with the eighth distribution pipe 2, namely, the eighth distribution pipe 2, the eighth distribution pipe is sequentially connected with the fifth distribution pipe 4, the eighth distribution pipe 4, the sixth distribution pipe 4, the connecting block is sequentially arranged on the left side of the connecting block 2, and the connecting block is sequentially, the eighth distribution pipe 11;
5) Eight right connectors which are respectively communicated with left connectors connected with a first distribution pipe 4, a third distribution pipe 6, a second distribution pipe 5, a fifth distribution pipe 8, a sixth distribution pipe 9, an eighth distribution pipe 11, a fourth distribution pipe 7 and a seventh distribution pipe 10 are sequentially arranged on the right side wall of the connecting block 2 from bottom to top, eight cylinder pipes positioned on the right side of the connecting block 2 are arranged according to a left-right two-row four-row distribution mode, wherein the eight cylinder pipes comprise a first cylinder pipe 12, a second cylinder pipe 13, a third cylinder pipe 14, a fourth cylinder pipe 15, a fifth cylinder pipe 16, a sixth cylinder pipe 17, a seventh cylinder pipe 18 and an eighth cylinder pipe 19, the first cylinder pipe 12, the second cylinder pipe 13, the fourth cylinder pipe 15 and the seventh cylinder pipe 18 are sequentially distributed from front to back to form a right row, the third cylinder pipe 14, the fifth cylinder pipe 16, the sixth cylinder pipe 17 and the eighth cylinder pipe 19 are sequentially distributed from front to back to form a left row, and the ends of the first cylinder pipe 12, the third cylinder pipe 14, the second cylinder pipe 13, the fifth cylinder pipe 16, the sixth cylinder pipe 17, the eighth cylinder pipe 19, the fourth cylinder pipe 15 and the seventh cylinder pipe 18, which are bent and then form straight line segments, are sequentially and correspondingly connected with eight right connectors on the right side wall of the connecting block 2 after being distributed from bottom to top, so that the first distribution pipe 4 and the first cylinder pipe 12, the third distribution pipe 6 and the third cylinder pipe 14, the second distribution pipe 5 and the second cylinder pipe 13, the fifth distribution pipe 8 and the fifth cylinder pipe 16, the sixth distribution pipe 9 and the sixth cylinder pipe 17, the eighth distribution pipe 11 and the eighth cylinder pipe 19, the fourth distribution pipe 7 and the fourth cylinder pipe 15, and the seventh distribution pipe 10 and the seventh cylinder pipe 18 are correspondingly and communicated one by one; by adopting the arrangement mode of the cylinder pipes, the space trend of the plurality of cylinder pipes can be ensured, and the phenomenon of disordered interlacing can not occur;
6) According to the spatial position and size relationship between the connecting block 2 and the cylinder interface board 3 in the three-dimensional model, as shown in fig. 2, two rows of cylinder pipes distributed on the left and right of the vertical section extend to the bottom position of the front end of the heat shield bottom board 20 along the Z-axis direction, after being bent at right angles for the first time, the two rows of cylinder pipes extend to the middle position of the width of the heat shield bottom board 20 along the Y-axis direction, at the moment, the right row of cylinder pipes are arranged above and the left row of cylinder pipes are arranged below, and after being bent and turned for the second time, the two rows of cylinder pipes extend to the rear end of the interface board 20 along the X-axis direction parallel to the length direction of the heat shield bottom board 20, as shown in fig. 3, the two rows of cylinder pipes are bent for two times in the process of extending to the rear end of the heat shield bottom board 20, so that the eight-number cylinder pipe 19, the seven-number cylinder pipe 18, the six-number cylinder pipe 17, the five-number cylinder pipe 16, the four-number cylinder pipe 15, the three-number three-cylinder pipe 14, the two-number-cylinder pipe 13, and the one-number cylinder pipe 12 are led out and then connected with the corresponding cylinder 3 in turn and enter the cylinder interface board 3.
As shown in fig. 1, the air distributor 1, the connecting block 2 and the cylinder interface plate 3 in the functional part are bent one by one on site according to the actual state; the connection principle is as follows: starting from a first cylinder pipe 12 connected with a cylinder interface board 3, the first cylinder pipe is converted into a first interface 21 corresponding to a first distribution pipe 4 and enters an air distributor 1 through a connecting block 2, a second cylinder pipe 13 is converted into a second interface 22 corresponding to a second distribution pipe 5 and enters the air distributor 1 through the connecting block 2, a third cylinder pipe 14 is converted into a third interface 23 corresponding to a third distribution pipe 6 and enters the air distributor 1 through the connecting block 2, a fourth cylinder pipe 15 is converted into a fourth interface 24 corresponding to a fourth distribution pipe 7 and enters the air distributor 1 through the connecting block 2, a fifth cylinder pipe 16 is converted into a fifth interface 25 corresponding to a fifth distribution pipe 8 and enters the air distributor 1 through the connecting block 2, a sixth cylinder pipe 17 is converted into a sixth interface 26 corresponding to a sixth distribution pipe 9 and enters the air distributor 1 through the connecting block 2, a seventh cylinder pipe 18 is converted into a seventh interface 27 corresponding to the seventh distribution pipe 10 and enters the air distributor 1 through the connecting block 2 until an eighth cylinder pipe 19 is converted into a eighth interface 28 corresponding to an eighth transfer pipe 11 and enter the air distributor 1, so that the air distributor 1 is connected one by one way, and the compressed air distributor is started to control the air inlet and the air distributor 1;
according to the technical scheme, an integrated design mode is introduced to design the layout of a control air pipeline, under a three-dimensional modeling environment, the pipeline is generally arranged to a single pipe fitting space bending form, an overall planning and gradually refining design idea is adopted, and when the position size of each space interface and the space trend of the pipe fitting are determined through the digital-analog assembly relation of parts such as an air distributor 1, a connecting block 2 and a cylinder interface board 3, the interference possibility of other parts is avoided, when the layout design form of the integrated pipeline form is realized and the problem of space staggering occurs, the problem of interference with other diesel engine parts can be visually checked under the three-dimensional environment, so that the space crossing on the control air pipeline layout can be timely avoided, and the consistency of the air pipeline arrangement process is realized;
the logical relationship of a plurality of distribution pipes and cylinder pipes is reversely deduced and arranged, so that the connecting block 2 is used as an inflection point for adjusting the logical change of the pipeline sequencing, the air distribution pipes 1 and the cylinder pipes are strictly arranged according to the logical relationship when the air distribution pipes are spatially sequenced, and a single-plane step type pipe bending method is introduced when the distribution pipes and the cylinder pipes are spatially bent, so that the positions of the distribution pipes and the cylinder pipes are changed according to the logical relationship front and back, the regular and compact distribution on the pipeline space is ensured, and the attractiveness and the bearing performance of technical capability are improved;
in the diesel engine digital-analog environment, the pipeline trend can be correspondingly changed according to the change of the scheme, various scheme forms can be visually displayed, the comparison and the adjustment are convenient, the optimization scheme is more perfect, and the design plan of the pipeline is more attractive;
the change of the appearance quality of the pipe fitting is improved: the numerical control bending pipe fitting has the characteristics of good bending quality and consistency, bending and integral assembly are carried out according to design requirements, pipe fitting direction conversion among multiple planes is realized, the pipe fitting arrangement is horizontal, flat and vertical, transition is smooth, attractiveness is good, process parameters of numerical control bending of the pipe fitting can be formed, and a full-period digital file of the pipe fitting is formed.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (3)
1. The layout method of the marine diesel engine control air pipeline is characterized by comprising the following steps:
1) establishing a three-dimensional model of the air distributor (1), the connecting block (2) and the cylinder interface plate (3) according to the spatial position and size relationship of each cylinder interface on the site air distributor (1), the connecting block (2) and the cylinder interface plate (3);
2) The air distributor (1) with nine interfaces is adopted, wherein the interface in the middle of the air distributor (1) is an air inlet pipe interface, the four upper, lower, left and right surfaces of the air distributor (1) are respectively provided with an interface which is communicated with the air inlet pipe interface and has the same pipe orifice size, and the eight interfaces are respectively a first interface (21), a second interface (22), a third interface (23), a fourth interface (24), a fifth interface (25), a sixth interface (26), a seventh interface (27) and an eighth interface (28); according to the position relation between the air distributor (1) and the connecting block (2), the positions of eight interfaces on the upper face, the lower face, the left face and the right face of the air distributor (1) are distributed, the interfaces on the upper end wall face of the air distributor (1) are a fourth interface (24) and a seventh interface (27) from left to right, the interfaces on the left side wall face of the air distributor (1) are a first interface (21) and a third interface (23) from top to bottom, the interfaces on the lower end wall face of the air distributor (1) are a second interface (22) and a fifth interface (25) from left to right, and the interfaces on the right end wall face of the air distributor (1) are a sixth interface (26) and an eighth interface (28) from top to bottom;
3) According to the space size relation between the air distributor (1) and the connecting block (2) in the three-dimensional model, eight distributing pipes connected with interfaces on the upper surface, the lower surface, the left surface and the right surface of the air distributor (1) are bent by adopting a stepped bending method, wherein the eight distributing pipes comprise a first distributing pipe (4), a second distributing pipe (5), a third distributing pipe (6), a fourth distributing pipe (7), a fifth distributing pipe (8), a sixth distributing pipe (9), a seventh distributing pipe (10) and an eighth distributing pipe (11); the distribution pipe comprises a No. seven distribution pipe (10), a No. three distribution pipe (6), a No. five distribution pipe (8) and a No. eight distribution pipe (11), wherein the lengths of first straight lines at the joints of the No. seven connector (27), the No. three connector (23), the No. five connector (25) and the No. eight connector (28) are the same as those of the No. seven distribution pipe, the No. three connector (23), the No. five connector (25) and the No. eight connector (28), the lengths of the No. four distribution pipe (7), the No. one distribution pipe (4), the No. two distribution pipe (5) and the No. six distribution pipe (9) are the same as those of the joints of the No. four connector (24), the No. one connector (21), the No. two connector (22) and the No. six connector (26), and the lengths of the first straight lines of the No. four distribution pipe (7), the No. one distribution pipe (4), the No. two distribution pipe (5) and the No. six distribution pipe (9) are larger than those of the No. seven distribution pipe (10), the No. three distribution pipe (6), the No. five distribution pipe (8) and the No. eight distribution pipe (11);
4) Eight distribution pipes are bent along a first straight line segment to the direction of the connecting block (2) and then form a square annular structure on the periphery of the air distributor (1), the fourth distribution pipe (7), the first distribution pipe (4), the second distribution pipe (5) and the sixth distribution pipe (9) are respectively positioned at the front sides of the seventh distribution pipe (10), the third distribution pipe (6), the fifth distribution pipe (8) and the eighth distribution pipe (11), and two rows of pipelines are formed outside the connecting block (2) and the air distributor (1), wherein the front rows of pipelines are sequentially provided with the fourth distribution pipe (7), the first distribution pipe (4), the second distribution pipe (5) and the sixth distribution pipe (9) from left to right, and the rear rows of pipelines are sequentially provided with the seventh distribution pipe (10), the third distribution pipe (6), the fifth distribution pipe (8) and the eighth distribution pipe (11) from left to right, the eight distribution pipes are bent again according to a step bending method, so that at least one pipe diameter distance is reserved between two adjacent distribution pipes after the front-row distribution pipes and the rear-row distribution pipes are bent, the front-row distribution pipes and the rear-row distribution pipes are sequentially distributed at intervals and then communicated with a left connecting port corresponding to the left side of the connecting block (2), namely the eight distribution pipes are sequentially a first distribution pipe (4), a third distribution pipe (6), a second distribution pipe (5), a fifth distribution pipe (8) from bottom to top on the connecting block (2), A sixth distributing pipe (9), an eighth distributing pipe (11), a fourth distributing pipe (7) and a seventh distributing pipe (10);
5) Eight right connectors which are respectively communicated with a left connector connected with a first distribution pipe (4), a third distribution pipe (6), a second distribution pipe (5), a fifth distribution pipe (8), a sixth distribution pipe (9), an eighth distribution pipe (11), a fourth distribution pipe (7) and a seventh distribution pipe (10) are sequentially arranged on the right side wall of the connecting block (2) from bottom to top, eight cylinder pipes positioned on the right side of the connecting block (2) are arranged according to a distribution mode of four cylinders in each row of a left row and a right row, wherein the eight cylinder pipes comprise a first cylinder pipe (12), a second cylinder pipe (13), a third cylinder pipe (14), a fourth cylinder pipe (15), a fifth cylinder pipe (16), a sixth cylinder pipe (17), a seventh cylinder pipe (18) and an eighth cylinder pipe (19), the first cylinder pipe (12), the second cylinder pipe (13), the fourth cylinder pipe (15) and the seventh cylinder pipe (18) are sequentially distributed from front to back and then are arranged in the right row, the third cylinder pipe (14), the fifth cylinder pipe (16), the sixth cylinder pipe (17) and the eighth cylinder pipe (19) are sequentially distributed from front to back and then are arranged in the left row, and the ends of the first cylinder pipe (12), the third cylinder pipe (14), the second cylinder pipe (13), the fifth cylinder pipe (16), the sixth cylinder pipe (17), the eighth cylinder pipe (19), the fourth cylinder pipe (15) and the seventh cylinder pipe (18) which are bent to form straight line segments are sequentially distributed from bottom to top and then sequentially connected with the ends of the straight line segments Eight right connecting ports on the right side wall of the connecting block (2) are correspondingly connected, so that a first distribution pipe (4) and a first cylinder pipe (12), a third distribution pipe (6) and a third cylinder pipe (14), a second distribution pipe (5) and a second cylinder pipe (13), a fifth distribution pipe (8) and a fifth cylinder pipe (16), a sixth distribution pipe (9) and a sixth cylinder pipe (17), an eighth distribution pipe (11) and an eighth cylinder pipe (19), a fourth distribution pipe (7) and a fourth cylinder pipe (15), and a seventh distribution pipe (10) and a seventh cylinder pipe (18) are correspondingly and communicated one by one through the connecting block (2) from bottom to top;
6) According to the spatial position and size relation of a connecting block (2) and a cylinder interface board (3) in a three-dimensional model, two rows of cylinder pipes distributed on the left and right of a vertical section extend to the bottom position of the front end of a heat shield bottom plate (20) along the Z axis, the two rows of cylinder pipes extend to the middle position of the width of the heat shield bottom plate (20) along the Y axis after being bent at right angles for the first time, at the moment, the right row of cylinder pipes are arranged above and the left row of cylinder pipes are arranged below, the two rows of cylinder pipes are bent and turned for the second time to extend along the X axis parallel to the length direction of the heat shield bottom plate (20) to the rear end of the interface board (20) of the heat shield bottom plate (20), and the two rows of cylinder pipes are bent for two times in the process of extending to the rear end of the heat shield bottom plate (20), so that the connection of an eighth cylinder pipe (19), a seventh cylinder pipe (18), a sixth cylinder pipe (17), a fifth cylinder pipe (16), a fourth cylinder pipe (15), a third cylinder pipe (14), a second cylinder pipe (13) and a corresponding cylinder pipe (12) which is led out to the upper cylinder port of the first cylinder (3) is connected with the heat shield bottom plate.
2. The method of laying out a marine diesel control air line according to claim 1, wherein: in the step 2), the first straight-line segment lengths of the fourth distribution pipe (7), the first distribution pipe (4), the second distribution pipe (5) and the sixth distribution pipe (9) are at least greater than one pipe diameter of the first straight-line segment lengths of the seventh distribution pipe (10), the third distribution pipe (6), the fifth distribution pipe (8) and the eighth distribution pipe (11).
3. The method of laying out a marine diesel controlled air line according to claim 1, wherein: in the step 2), the tube serial numbers of the eight distribution tubes correspond to the interface serial numbers on the upper, lower, left and right surfaces of the air distributor (1) one by one.
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| US4649871A (en) * | 1984-03-22 | 1987-03-17 | Mazda Motor Corporation | Intake system for V-type engine |
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| DE102009027539A1 (en) * | 2009-07-08 | 2011-01-20 | Ford Global Technologies, LLC, Dearborn | Internal combustion engine with intercooler |
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