CN218624478U

CN218624478U - Arrangement structure of common rail high-pressure oil pipe of diesel engine

Info

Publication number: CN218624478U
Application number: CN202223286348.0U
Authority: CN
Inventors: 徐攀; 张萍; 丁清华
Original assignee: Shandong Luxi Dasheng Environmental Protection Technology Co ltd; Weifang Institute Of Technology
Current assignee: Shandong Luxi Dasheng Environmental Protection Technology Co ltd; Weifang Institute Of Technology
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-03-14
Anticipated expiration: 2032-12-08

Abstract

The utility model discloses a diesel engine common rail high pressure fuel pipe's arrangement structure, a plurality of camshaft seats that the interval set up in cylinder cap seat and the cylinder cap seat, a plurality of camshaft seats become a plurality of cavities with cylinder cap seat inter space, are provided with the sprayer in every cavity, are provided with the common rail pipe on the lateral wall of cylinder cap seat, be provided with on the common rail pipe and fix the positioning mechanism on the cylinder cap seat with the common rail pipe, the interval is provided with many high pressure fuel pipe of connection on adjacent sprayer on the common rail pipe, is located the mutual symmetry setting in center of many high pressure fuel pipes along common rail pipe axis on the common rail pipe. The utility model discloses stable in structure, simple to operate through will be altogether the rail pipe and install on cylinder head seat outer wall, greatly reduce high pressure fuel pipe's length and easy dismounting, can guarantee through short high pressure fuel pipe that fuel pressure loss is minimum, and many high pressure fuel pipes along the mutual symmetry in center of rail pipe axis altogether, more convenience when can making the staff installation and overhaul, still effectively reduce the technology cost.

Description

Arrangement structure of common rail high-pressure oil pipe of diesel engine

Technical Field

The utility model relates to a diesel engine technical field, specificly relate to a diesel engine common rail high pressure fuel pipe's arrangement structure among diesel engine high pressure common rail injection system.

Background

At present, in a high-pressure common rail injection system of a diesel engine, a high-pressure oil pipe is used as a channel for communicating a high-pressure oil rail of the diesel engine with an oil injector, and the high-pressure oil pipe not only needs to bear frequent high-pressure impact of high-pressure fuel oil to ensure normal operation of the diesel engine, but also needs to avoid excessive vibration so as to avoid fuel oil leakage caused by loosening or damage of an oil pipe joint.

And the following requirements are arranged on the high-pressure oil pipe on the multi-cylinder diesel engine: the lengths of the high-pressure oil pipes on the cylinders are required to be equal as much as possible, so that each oil injector of the diesel engine has the same oil injection pressure, and the deviation of the oil injection quantity among the cylinders of the diesel engine is reduced; it is also desirable that the high pressure fuel lines on each cylinder be as short as possible to minimize pressure loss from the high pressure rail to the injector, and thus to minimize pressure fluctuations in the high pressure piping system.

However, in the "diesel engine common rail high pressure oil pipe arrangement structure" of the prior art with patent number CN200620083639.1, the high pressure oil pipes are divided into two groups, the length between each group of high pressure oil pipes is the same, the length of each group of high pressure oil pipes is relatively long, the oil pipes have different appearance structures, and the oil pipes need to be fixed by pipe clamps, so the structure has poor assembly manufacturability, and the long high pressure oil pipe causes great fuel pressure loss.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above problem provide a firm and less diesel engine common rail high pressure fuel pipe's of loss arrangement structure of structure.

In order to achieve the purpose, the utility model discloses a diesel engine common rail high pressure fuel pipe's arrangement structure, a plurality of camshaft seats that the interval set up in jar cover seat and jar cover seat, a plurality of camshaft seats become a plurality of cavities with the interval in the jar cover seat, are provided with the sprayer in every cavity, and its structural feature is, is provided with common rail pipe on the lateral wall of jar cover seat, be provided with on the common rail pipe and fix the positioning mechanism on the jar cover seat with common rail pipe, the interval is provided with many high pressure fuel pipes of connection on adjacent sprayer on the common rail pipe, and the mutual symmetry setting in center along common rail pipe axis is followed to many high pressure fuel pipes on the common rail pipe that is located.

After adopting above-mentioned structure, will share the rail pipe and install on cylinder cap seat outer wall, can reduce high pressure fuel pipe's length and arrange more conveniently, shorter high pressure fuel pipe can guarantee that fuel pressure loss is minimum, and with many high pressure fuel pipes along sharing the central mutual symmetry of rail pipe axis, more convenient when making its installation overhaul to effectively reduce technology cost.

The common rail pipe is fixedly connected on the outer side wall of the cylinder cover seat along the length direction of the cylinder cover seat, a plurality of connectors are arranged on the common rail pipe along the length direction at intervals, the number of the connectors corresponds to the number of oil sprayers in the cylinder cover seat one by one, a plurality of limiting ports corresponding to the connectors are arranged on the outer side wall of the cylinder cover seat below the common rail pipe at intervals, the connectors correspond to the limiting ports mutually, the shortest length of a high-pressure oil pipe can be effectively guaranteed, and the minimum fuel pressure loss is guaranteed.

Positioning mechanism includes three fixed mounting seats of group, and two end position departments about three fixed mounting seats set up respectively at the middle part position of rail altogether pipe and being close to rail altogether pipe, fixed mounting seat is equipped with the arc opening that suits with rail altogether pipe radian for bar dog and bottom surface down, and the top surface is equipped with respectively near both ends punishment and runs through the body and will be fixed the fixing bolt on the cylinder cap seat altogether rail pipe on the bar dog. Through three fixed mounting seats of group, can effectually fix the common rail pipe on the cylinder head seat outer wall, and the setting of arc opening also makes things convenient for with common rail pipe mutually agrees with more.

And two ends of the high-pressure oil pipe are respectively connected to the connecting port of the common rail pipe and the oil injector adjacent to the connecting port, and the length of each high-pressure oil pipe is the same. The high-pressure oil pipe connection mode with the shortest distance is adopted, the high-pressure oil pipe connection mode can be fixed without installing a pipe clamp, and the vibration requirement is met through the toughness of the high-pressure oil pipe.

The connecting port is located at the position obliquely above the limiting port, the limiting port and the oil sprayer are located in the same vertical plane, and the adjacent limiting ports are parallel to the vertical plane where the oil sprayer is located. The connecting port is positioned at the position obliquely above the limiting port, so that the bending radian of the high-pressure oil pipe can be effectively guaranteed, the high-pressure oil pipe is smooth, and the minimum fuel pressure loss is guaranteed.

Be provided with the reinforcing plate on the cylinder cap seat outer wall of spacing mouth department, the left and right sides of reinforcing plate is provided with the positioning bolt who fixes the reinforcing plate on the cylinder cap seat, and the reinforcing plate middle part is provided with the opening with spacing mouthful matched with. The setting of reinforcing plate can effectively strengthen the steadiness of spacing mouthful department cylinder cap seat body, prevents spacing mouthful department fracture problem.

The cylinder cover seat is a cylinder cover seat of a six-cylinder diesel engine, six cavities in the cylinder cover seat are respectively provided with an oil sprayer, and six high-pressure oil pipes which are equal in length and respectively penetrate through the side wall of the cylinder cover seat to be connected to the oil sprayer are arranged on the common rail pipe at intervals.

To sum up, the beneficial effects of the utility model reside in that: the utility model discloses stable in structure, simple to operate through will be altogether the rail pipe and install on cylinder head seat outer wall, greatly reduce high pressure fuel pipe's length and easy dismounting, can guarantee through shorter high pressure fuel pipe that fuel loss of pressure is minimum, and many high pressure fuel pipes along the mutual symmetry in center of altogether rail pipe axis, more convenience when can making the staff installation overhaul can also effectively reduce the technology cost.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic view of the structure of the present invention;

fig. 3 is a schematic top view of the present invention;

FIG. 4 is a schematic view of the position relationship between the connection port and the limiting port of the present invention;

fig. 5 is a schematic structural view of the fixing mount of the present invention;

fig. 6 is a schematic structural diagram of the prior art in the background art of the present invention.

In the figure: 1. a cylinder head base; 2. a camshaft seat; 3. a chamber; 4. an oil injector; 5. a common rail pipe; 6. a high pressure oil pipe; 7. a connecting port; 8. a limiting port; 9. fixing the mounting seat; 10. an arc-shaped opening; 11. fixing the bolt; 12. a reinforcing plate; 13. and (6) positioning the bolt.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "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 application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present application.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. The specific meaning of the above terms in this application will be understood to be a specific case for those of ordinary skill in the art.

The following is a description of preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1 and fig. 2, the utility model discloses a plurality of camshaft seats 2 that the interval set up in cylinder cap seat 1 and the cylinder cap seat 1, through a plurality of camshaft seats 2 with a plurality of cavities 3 of cylinder cap seat 1 internal interval, be provided with sprayer 4 in every cavity 3, during the design, cylinder cap seat 1 is the cylinder cap seat 1 of six jar diesel engines usually, sprayer 4 is installed respectively to six cavities 3 in the cylinder cap seat 1, this sprayer 4 is fixed in the cavity 3 in cylinder cap seat 1 along vertical direction, of course, also can use other multi-cylinder diesel engines during the preparation, cylinder cap seat 1 is known structure with sprayer 4's structure and mounting means, do not describe here again.

As shown in fig. 1-5, in a preferred embodiment of the present invention, a common rail pipe 5 is disposed on the outer sidewall of the cylinder head base 1, the common rail pipe 5 is fixedly connected to the outer sidewall of the cylinder head base 1 along the length direction of the cylinder head base 1, during design, a positioning mechanism for fixing the common rail pipe 5 to the cylinder head base 1 is installed on the common rail pipe 5, the positioning mechanism includes three sets of fixed mounts 9, and the three sets of fixed mounts 9 are respectively disposed at the middle position of the common rail pipe 5 and near the left and right ends of the common rail pipe 5, during manufacture, the fixed mount 9 is provided with an arc opening 10 adapted to the radian of the common rail pipe 5 for the lower bottom surface of the bar-shaped stopper and the bar-shaped stopper, the top surface of the bar-shaped stopper is provided with a fixing bolt 11 penetrating through the body and fixing the common rail pipe 5 to the cylinder head base 1 near the two ends, the fixing bolt 11 is fixed to the cylinder head base 1 in a threaded manner, so as to the three sets of the common rail pipe 5, the common rail pipe 5 can be effectively fixed to the outer wall of the common rail base 1, the common rail pipe 5 can be further provided with a common rail ring 5, and the common rail pipe 5 can be provided with a common rail ring groove for the common rail pipe 5.

As shown in fig. 1, 2 and 3, in another preferred embodiment of the present invention, a plurality of connectors 7 are provided on the common rail pipe 5 along the length direction thereof at intervals, the number of the connectors 7 corresponds to the number of the fuel injectors 4 in the cylinder head base 1 one by one, and meanwhile, a high-pressure fuel pipe 6 connected to the adjacent fuel injectors 4 is respectively installed on the connectors 7 of the common rail pipe 5, during the design, a plurality of limiting ports 8 corresponding to the connectors 7 are provided at intervals on the outer side wall of the cylinder head base 1 below the common rail pipe 5, usually, the connectors 7 are located at positions obliquely above the limiting ports 8, and the limiting ports 8 and the fuel injectors 4 corresponding thereto are located in the same vertical plane, and the vertical planes of the adjacent limiting ports 8 and the fuel injectors 4 are parallel to each other. Therefore, the arrangement mode that the connecting port 7 is located at the position obliquely above the limiting port 8 can effectively ensure the bending radian of the high-pressure oil pipe 6, so that the high-pressure oil pipe 6 is smooth to ensure the minimum fuel pressure loss; during the preparation, be provided with reinforcing plate 12 on the 1 outer wall of jar lid seat of spacing mouthful 8 department, the left and right sides of reinforcing plate 12 is provided with fixes reinforcing plate 12 on jar lid seat 1 positioning bolt 13, and reinforcing plate 12 middle part be provided with spacing mouthful 8 matched with opening, can effectively strengthen the steadiness of the 1 body of jar lid seat of spacing mouthful 8 department through setting up of reinforcing plate 12 like this, prevent spacing mouthful 8 fracture problem. The two ends of the high-pressure oil pipe 6 are respectively connected to the connecting port 7 of the common rail pipe 5 and the oil injector 4 adjacent to the connecting port 7, so that the high-pressure oil pipe 6 is short enough, the lengths of the high-pressure oil pipes 6 are the same, the high-pressure oil pipe 6 with the shortest length is connected, the high-pressure oil pipe 6 does not need to be fixed by installing a pipe clamp, the vibration requirement is met by the toughness of the high-pressure oil pipe 6, and the minimum fuel pressure loss is ensured; of course, the oil pipe joints at the two ends of the high-pressure oil pipe 6 are known structures, and are not described herein.

As shown in fig. 1 and 2 and fig. 3, the utility model discloses an in a specific embodiment, many high pressure fuel pipe 6 on the above-mentioned common rail pipe 5 set up along the mutual symmetry in center of common rail pipe 5 axis, high pressure fuel pipe 6 through many mutual symmetries can guarantee under the prerequisite that each high pressure fuel pipe 6 length is the same, make high pressure fuel pipe 6 convenient assembling and furthest's rational utilization common rail pipe 5's standard length, thereby further greatly reduced the process cost, more make things convenient for staff's dismantlement and maintenance, this arrangement structure is generally used for six jar diesel engines, during the installation, can be provided with six length at the interval on the common rail pipe 5 and equal and pass the high pressure fuel pipe 6 of cylinder cap seat 1 lateral wall connection on sprayer 4 respectively, this common rail pipe 5's middle part and be close to the both ends position and go out to install the fixed mounting seat 9 of fixing common rail pipe 5 on cylinder cap seat 1, each three high pressure fuel pipe 6 in the left and right sides are separated into by common rail pipe 5 middle part's fixed mounting seat 9, three high pressure fuel pipe 6 on the left side are along three mutual symmetries 9.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims

1. The utility model provides a diesel engine common rail high pressure fuel pipe's arrangement structure, includes a plurality of camshaft seats (2) that the interval set up in cylinder cap seat (1) and cylinder cap seat (1), and a plurality of camshaft seats (2) become a plurality of cavities (3) with cylinder cap seat (1) interior interval, are provided with sprayer (4), its characterized in that in every cavity (3): be provided with common rail pipe (5) on the lateral wall of jar lid seat (1), be provided with on common rail pipe (5) and fix common rail pipe (5) the positioning mechanism on jar lid seat (1), the interval is provided with many high pressure fuel pipes (6) of connecting on adjacent sprayer (4) on common rail pipe (5), and the central mutual symmetry setting along common rail pipe (5) axis is followed in many high pressure fuel pipes (6) that lie in on common rail pipe (5).

2. The layout structure of the diesel engine common rail high pressure oil pipe of claim 1, wherein: the common rail pipe (5) is horizontally and fixedly connected to the outer side wall of the cylinder cover seat (1) along the length direction of the cylinder cover seat (1), a plurality of connectors (7) are arranged on the common rail pipe (5) along the length direction at intervals, the number of the connectors (7) corresponds to the number of the oil sprayers (4) in the cylinder cover seat (1) one by one, and a plurality of limiting ports (8) corresponding to the connectors (7) are arranged on the outer side wall of the cylinder cover seat (1) below the common rail pipe (5) at intervals.

3. The layout structure of the diesel engine common rail high pressure oil pipe of claim 1, wherein: positioning mechanism includes three fixed mounting seats of group (9), and two end position departments about three fixed mounting seats of group (9) set up respectively at the middle part position of common rail pipe (5) and being close to common rail pipe (5), fixed mounting seat (9) are equipped with arc opening (10) that suit with common rail pipe (5) radian for bar dog and bottom surface down, and the top surface is equipped with respectively near both ends punishment and runs through body and fix fixing bolt (11) on jar lid seat (1) with common rail pipe (5) on the bar dog.

4. The layout structure of the diesel engine common rail high pressure oil pipe of claim 2, wherein: and two ends of the high-pressure oil pipe (6) are respectively connected to the connecting port (7) of the common rail pipe (5) and the oil injector (4) adjacent to the connecting port (7), and the length of each high-pressure oil pipe (6) is the same.

5. The arrangement structure of the diesel common rail high pressure oil pipe of claim 2, wherein: the connecting port (7) is located at the position obliquely above the limiting port (8), the limiting port (8) and the oil sprayer (4) are located in the same vertical plane, and the vertical planes where the adjacent limiting port (8) and the oil sprayer (4) are located are parallel to each other.

6. The layout structure of the diesel engine common rail high pressure oil pipe of claim 2, wherein: be provided with reinforcing plate (12) on cylinder cap seat (1) outer wall of spacing mouthful (8) department, the left and right sides of reinforcing plate (12) is provided with fixes positioning bolt (13) on cylinder cap seat (1) with reinforcing plate (12), reinforcing plate (12) middle part be provided with spacing mouthful (8) matched with opening.

7. The layout structure of the diesel engine common rail high pressure oil pipe of claim 1, wherein: the cylinder cover seat (1) is a cylinder cover seat (1) of a six-cylinder diesel engine, six cavities (3) in the cylinder cover seat (1) are respectively provided with an oil sprayer (4), and six high-pressure oil pipes (6) which are equal in length and respectively penetrate through the side wall of the cylinder cover seat (1) and are connected onto the oil sprayer (4) are arranged on the common rail pipe (5) at intervals.