CN205154475U - Be total to rail system high pressure subassembly and high -pressure pump - Google Patents
Be total to rail system high pressure subassembly and high -pressure pump Download PDFInfo
- Publication number
- CN205154475U CN205154475U CN201520667517.6U CN201520667517U CN205154475U CN 205154475 U CN205154475 U CN 205154475U CN 201520667517 U CN201520667517 U CN 201520667517U CN 205154475 U CN205154475 U CN 205154475U
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- CN
- China
- Prior art keywords
- rail system
- high pressure
- core
- system high
- common rail
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- 239000003921 oil Substances 0.000 description 18
- 239000000463 material Substances 0.000 description 3
- 239000000446 fuel Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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- Fuel-Injection Apparatus (AREA)
Abstract
The utility model discloses a be total to rail system high pressure subassembly, including the plunger bushing, set up the plunger hole that communicates each other in the plunger bushing and hold the chamber, the plunger is downthehole to be set up in the plunger that can make reciprocating motion, hold the intracavity and be provided with valve module and valve keeper, wherein, the valve keeper includes that core and cover locate the outer connecting portion of core, the core support press in on the valve module, connecting portion are connected with the plunger bushing. Through above structure setting, can satisfy in some cases to the outside of the valve keeper of rail system high pressure subassembly and the requirement that the hole has different properties altogether.
Description
Technical field
The utility model, about a kind of common rail system high pressure assembly and high-pressure service pump, especially comprises the common rail system high pressure assembly and high-pressure service pump with split type valve holder.
Background technique
High potential assembly in common rail system, as its core component, plays vital effect in the overall work process of common rail system.Refer to shown in Fig. 1, existing common rail system high pressure assembly 1 comprises plunger bushing 10, the plunger hole 100 communicated with each other and cavity volume 101 is offered in described plunger bushing 10, being provided with in plunger hole 100 can along the reciprocating plunger 11 of this plunger hole 100, valve assembly 12 and valve holder 13 is provided with in described cavity volume 101, described valve holder 13 presses on described valve assembly 12, and valve assembly 12 can be firmly arranged in cavity volume 101.Valve holder 13 is connected with cavity volume 101 by screw thread.Input oil circuit is formed in described valve assembly 12, and in valve holder 13, be formed with output circuit, high pressure oil is by entering output circuit after described input oil circuit, by being arranged at the valve piston 130 in the output circuit in described valve holder 13, can break-make between control inputs oil circuit and output circuit.
When high pressure oil circulates in input oil circuit and output circuit, can impact the endoporus of valve holder 13, valve holder 13 outside will contact with other parts, like this for the endoporus of valve holder 13 and the performance requirement of outer wall and inconsistent, but the integrative-structure of valve holder 13 of the prior art makes to adopt Different treatments to become inconvenient to endoporus and outer wall.
Model utility content
The purpose of this utility model is to provide the common rail system high pressure assembly and high-pressure service pump with split type valve holder.
The utility model provides a kind of common rail system high pressure assembly, comprise plunger bushing, the plunger hole communicated with each other and cavity volume is offered in described plunger bushing, plunger that can be reciprocating is arranged in described plunger hole, be provided with valve assembly and valve holder in described cavity volume, it is characterized in that, described valve holder comprises core and is sheathed on the joint outside described core, described core presses on described valve assembly, and described joint is connected with plunger bushing.
The utility model also has further feature, offers input oil circuit in described valve assembly, offers the output circuit be communicated with described input oil circuit selectivity in described valve holder.
The utility model also has further feature, and described output circuit is arranged at hardness higher than in the core of joint.
The utility model also has further feature, and described output circuit is arranged at and is 600-700HV by hardness, is in the core of 200-300HV joint higher than hardness.
The utility model also has further feature, and described valve assembly includes valve piston, and described valve piston can opening and closing between control inputs oil circuit and output circuit.
The utility model also has further feature, and described joint has the convex shoulder extended to core, and core is provided with the adapting table corresponding to described convex shoulder, and described core is held in described cavity volume by described convex shoulder and adapting table.
The utility model also has further feature, described joint is formed with outside thread, and in described cavity volume, is formed with the internal thread that can be connected with described outside thread.
The utility model also has further feature, is provided with seal ring between described joint and described cavity volume.
The utility model also provides a kind of common-rail high-pressure pump, comprises pump case and as aforementioned common rail system high pressure assembly.
By above vibrational power flow, the requirement in some cases outside of the valve holder of common rail system high pressure assembly and endoporus to various trait can be met.
Accompanying drawing explanation
Below with reference to the accompanying drawings exemplary embodiment of the present utility model is described in detail, should be appreciated that embodiment described below only for explaining the utility model, and scope of the present utility model is not restricted, appended accompanying drawing wherein:
Fig. 1 is the sectional view of a kind of common rail system high pressure assembly of prior art;
Fig. 2 is the sectional view of a kind of common rail system high pressure assembly of the present utility model, and figure mesohigh assembly is in oil suction state;
Fig. 3 is the sectional view of a kind of common rail system high pressure assembly of the present utility model, and figure mesohigh assembly is in pressurized state.
Embodiment
In different drawings, the identical reference character of same or analogous parts represents.
Should be appreciated that accompanying drawing only for being described the utility model, wherein the number of the size of parts, proportionate relationship and parts is not all as to restriction of the present utility model.
Refer to shown in Fig. 2, a kind of high-pressure common rail assembly 9 of the utility model, comprises plunger bushing 90, only part is shown in detail in this figure.In this plunger bushing 90, be provided with plunger hole 900 and cavity volume 901, this plunger hole 900 is interconnected with cavity volume 901.In this plunger hole 900, be provided with plunger 91, described plunger 91 can to-and-fro motion in this plunger hole 900, is provided with valve assembly 92 and valve holder 93 in cavity volume 901.In described valve assembly 92, offer valve piston hole 921, valve piston 922 is arranged in described valve piston hole 921.In valve assembly 92, be provided with input oil circuit, described valve piston hole 921 is parts of described input oil circuit.Described valve holder 93 bottom is formed with pressurizing chamber 931, and described valve piston 922 can control the opening and closing of described input oil circuit and pressurizing chamber 931.In valve holder 93, then have output circuit further, described pressurizing chamber 931 is a part for output circuit.Plunger 91, when plunger hole 900 moves downward, forms host cavity 94 between plunger 91 and described valve assembly 92, and described host cavity 94 is communicated with described pressurizing chamber 931.Known from the above mentioned, described host cavity 94 is a part for plunger hole 900.
Shown in Fig. 2, valve holder 93 is split type setting, comprises core 933 and joint 935.Described core 933 can have different materials or processing mode according to actual needs from joint 935.In the present embodiment, the hardness of described core 933 is higher, and its hardness range is 600-700HV, and the hardness of joint 935 is lower, and its hardness range is 200-300HV.Core 933 adopts 100Cr6 material, and joint adopts 45 carbon steels.Namely aforementioned output circuit is in core 933.There is on the top of core 933 adapting table 9331 be inwardly recessed, accordingly, described joint 935 forms shoulder 9351 to described adapting table 9331 direction, and described shoulder 9351 can press on described adapting table 9331, thus core 933 is held in described cavity volume 901.In the outside of joint 935, form a screw thread, and for the inner side in cavity volume 901, form internal thread, described outside thread and described internal thread cooperatively interact, and described joint 935 can be made to be stable in described cavity volume 901.
Certainly, in other embodiments, core 933 and joint 935 also can adopt similar structure, ensure that joint 935 is connected with cavity volume 901, and are held in cavity volume by core 933.
Seal ring 95 is provided with between aforementioned joint 935 and described cavity volume 901.
Refer to shown in Fig. 2, valve piston 922 keeps the filler opening of pressurizing chamber 931 normally closed due to the effect of spring, and the oil outlet of pressurizing chamber 931 also keeps oil outlet normally closed because being provided with one-way pressure valve.In the oil suction stage, plunger 91 moves downward and form negative pressure in host cavity 94 and pressurizing chamber 931 in plunger hole 900, make valve piston 922 overcome spring pressure and open, thus fuel oil enters in host cavity 94 and pressurizing chamber 931 from input oil circuit; Shown in Fig. 3, in the fuel-displaced stage, plunger 91 moves upward and form high pressure in pressurizing chamber 931 in plunger hole 900, and valve piston 922 loses negative pressure and closes the passage between pressurizing chamber 931 and valve piston hole 921.When the fuel pressure in host cavity 94 and pressurizing chamber 931 increases to after the setting cracking pressure of one-way pressure valve, output circuit is connected, and high pressure oil releases.
Due in the present embodiment, valve holder 93 is made up of two-part, and output circuit and pressurizing chamber 931 are in core 933, and described fuel pressure can not damage effect for core 933.And joint 935 hardness is lower, the described outside thread that it is formed can provide more stable axial force with the internal thread being in cavity volume 901 inside when being connected.The core 933 that split is arranged can adopt different materials or different processing methods to reach different Property requirements from joint 935.
The utility model can also be a kind of common-rail high-pressure pump, comprises pump case and aforementioned high potential assembly, and structure and the form of its pump case belong to known technology to those skilled in the art person.
Below only combine the most practical preferred embodiment considered at present to be described the utility model; it will be appreciated that; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited to above-mentioned citing; the change that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement, also should belong to protection domain of the present utility model.
Claims (9)
1. a common rail system high pressure assembly, comprise plunger bushing, the plunger hole communicated with each other and cavity volume is offered in described plunger bushing, plunger that can be reciprocating is arranged in described plunger hole, be provided with valve assembly and valve holder in described cavity volume, it is characterized in that, described valve holder comprises core and is sheathed on the joint outside described core, described core presses on described valve assembly, and described joint is connected with plunger bushing.
2. common rail system high pressure assembly according to claim 1, is characterized in that, offers input oil circuit in described valve assembly, offers the output circuit be communicated with described input oil circuit selectivity in described valve holder.
3. common rail system high pressure assembly according to claim 2, is characterized in that, described output circuit is arranged at hardness higher than in the core of joint.
4. common rail system high pressure assembly according to claim 2, is characterized in that, described output circuit is arranged at hardness and is 600-700HV, is in the core of joint of 200-300HV higher than hardness.
5. common rail system high pressure assembly according to claim 3, is characterized in that, described valve assembly includes valve piston, and described valve piston can opening and closing between control inputs oil circuit and output circuit.
6. common rail system high pressure assembly according to claim 3, it is characterized in that, described joint has the convex shoulder extended to core, and core is provided with the adapting table corresponding to described convex shoulder, and described core is held in described cavity volume by described convex shoulder and adapting table.
7. the common rail system high pressure assembly according to any one of claim 1 to 6, is characterized in that, described joint is formed with outside thread, and in described cavity volume, is formed with the internal thread that can be connected with described outside thread.
8. the common rail system high pressure assembly according to any one of claim 1 to 6, is characterized in that, is provided with seal ring between described joint and described cavity volume.
9. a common-rail high-pressure pump, comprise pump case and as arbitrary in claim 1 to 8 as described in common rail system high pressure assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520667517.6U CN205154475U (en) | 2015-08-31 | 2015-08-31 | Be total to rail system high pressure subassembly and high -pressure pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520667517.6U CN205154475U (en) | 2015-08-31 | 2015-08-31 | Be total to rail system high pressure subassembly and high -pressure pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205154475U true CN205154475U (en) | 2016-04-13 |
Family
ID=55690180
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520667517.6U Active CN205154475U (en) | 2015-08-31 | 2015-08-31 | Be total to rail system high pressure subassembly and high -pressure pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205154475U (en) |
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2015
- 2015-08-31 CN CN201520667517.6U patent/CN205154475U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |