CN212389459U - High pressure of adjustable pressure and flow is defeated oil pump for rail altogether - Google Patents
High pressure of adjustable pressure and flow is defeated oil pump for rail altogether Download PDFInfo
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- CN212389459U CN212389459U CN202020700827.4U CN202020700827U CN212389459U CN 212389459 U CN212389459 U CN 212389459U CN 202020700827 U CN202020700827 U CN 202020700827U CN 212389459 U CN212389459 U CN 212389459U
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Abstract
The utility model discloses a high pressure of adjustable pressure and flow is rail-shared with fuel delivery pump, including setting up the regulation slide valve on the high-pressure end fuel oil passageway on the pump body, adjust the slide valve and include slide valve body, slide valve core, overflow spring and fixed stopper. The slide valve body is fixed on the high-pressure end fuel oil channel and is a hollow pipe, wherein one opening end of the hollow pipe is communicated with the high-pressure end fuel oil channel, and the pipe wall of the hollow pipe is provided with an oil drainage hole which is communicated with a low-pressure end fuel oil input channel on the pump body; the sliding valve core, the overflow spring and the fixing plug are sequentially arranged in the hollow pipe, the sliding valve core is a cylindrical piston, and the sliding valve core axially moves along the hollow pipe under the bidirectional action of fuel pressure and the overflow spring to control the opening and closing actions of the oil drain hole and the opening sectional area of the oil drain hole, so that the regulation of the fuel pressure and the flow is realized. The utility model discloses a set up the regulating slide valve on pump body high-pressure side fuel oil passageway, realize successfully replacing traditional ball valve structure to the regulation control of fuel pressure and flow, reduce the energy consumption.
Description
Technical Field
The utility model relates to a high pressure is rail-used fuel delivery pump low pressure fuel oil system related technical field especially relates to a high pressure of adjustable pressure and flow is rail-used fuel delivery pump altogether.
Background
The traditional oil transfer pump for the high-pressure common rail pump uses a one-way safety valve structure, and the pressure relief is opened through a ball valve so as to achieve the purpose of protecting the safety of a system. As shown in fig. 1, a ball valve structure of a conventional oil pump for a high-pressure common rail includes: valve seat 1, steel ball 2, overflow spring 3 and plug screw 4. The fuel oil enters the high-pressure end from the low-pressure end through the rotation of the two meshed gears 5, when the fuel oil pressure of the system is larger than the opening pressure of the ball valve structure, the ball valve is opened, namely the steel ball 2 is separated from the valve seat 1, the overflow spring 3 is compressed, and the fuel oil leaks back to the low-pressure end through a gap between the steel ball 2 and the inner wall 6 of the valve body channel to realize the pressure relief function. However, in the conventional ball valve structure, because the section of the gap between the steel ball and the inner wall of the valve body channel does not change along with the change of the compression depth of the overflow spring, the pre-tightening amount of the overflow spring can be adjusted only by screwing the plug screw 4, so that the opening pressure of the steel ball can be adjusted, the conventional ball valve structure cannot adjust the pressure and the flow of the oil delivery pump for the high-pressure common rail, and the controllability is poor.
Therefore, it is obvious that the above-mentioned conventional oil pump for high-pressure common rail still has inconvenience and defects in structure and use, and further improvement is needed. How to create a new high pressure common rail fuel delivery pump with adjustable pressure and flow, which can replace the traditional ball valve structure through the adjustable slide valve structure, not only can achieve the function of the original safety valve, but also can realize the regulation and control of the fuel pressure and flow of the fuel delivery pump, and becomes the target of great improvement in the current industry.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a high pressure of adjustable pressure and flow is rail-shared with fuel delivery pump, make it replace traditional ball valve structure through adjustable slide valve structure, both can reach the function of original relief valve, can realize the regulation and the control to fuel delivery pump fuel pressure, flow again to overcome the not enough of current high pressure rail-shared with fuel delivery pump.
In order to solve the technical problem, the utility model provides a high pressure common rail oil transfer pump capable of adjusting pressure and flow, which comprises an adjusting slide valve arranged on a high pressure end fuel oil channel on a pump body, wherein the adjusting slide valve comprises a slide valve body, a slide valve core, an overflow spring and a fixed plug;
the slide valve body is fixed on the high-pressure end fuel oil channel and is a hollow pipe, one opening end of the hollow pipe is communicated with the high-pressure end fuel oil channel, and an oil drainage hole is formed in the pipe wall of the hollow pipe and is communicated with a low-pressure end fuel oil input channel on the pump body; the sliding valve core, the overflow spring and the fixed plug are sequentially arranged inside the hollow pipe, the sliding valve core is a cylindrical piston, the sliding valve core axially moves along the hollow pipe under the bidirectional action of fuel pressure and the overflow spring, and meanwhile, the opening and closing actions of the oil drain hole and the opening sectional area of the oil drain hole are controlled, so that the regulation of fuel pressure and flow is realized.
The improved structure is characterized in that the slide valve core is a cylindrical piston cap with one closed end and the other open end, one end of the overflow spring is connected with the fixed plug, and the other end of the overflow spring is embedded in the cylindrical piston cap.
In a further improvement, the slide valve core is arranged into a step-shaped cylindrical piston, and the inner wall of the hollow pipe of the slide valve body is arranged into a step-shaped structure matched with the step-shaped cylindrical piston.
The improved structure is characterized in that the fixing plug is a fixing steel ball, and the fixing steel ball is in interference fit with the inner wall of the hollow pipe.
The improved slide valve is characterized in that at least two pressure relief holes are formed in the side wall of the slide valve body, the hole diameters of the pressure relief holes are the same, and the center lines of the pressure relief holes are on the same plane.
The improved structure is characterized in that an annular oil drainage groove is formed in the pump body corresponding to the pressure relief hole of the slide valve body, and the annular oil drainage groove is communicated with a low-pressure-end fuel input channel in the pump body.
In a further improvement, the side wall of the slide valve body is also provided with a pressure balance hole for adjusting the pressure of the compression area of the overflow spring.
In a further improvement, at least two pressure balance holes are arranged on the side wall of the slide valve body.
In a further improvement, the slide valve body is made of 20Cr material, and the slide valve core is made of GCr15 material.
After adopting such design, the utility model discloses following advantage has at least:
1. the utility model discloses a set up the regulation slide valve on the high-pressure side fuel oil passageway of the pump body, and through the cooperation of slide valve core and draining hole in the regulation slide valve, make slide valve core under the two-way effect of fuel pressure and overflow spring, along slide valve body hollow tube axial displacement, the action of opening and close of control draining hole and the sectional area of opening of draining hole, when fuel pressure is big promptly, the dynamics of overflow spring compressed is big, the sectional area is big is opened to the draining hole, pressure release flow grow, otherwise, slide valve core is under overflow spring's resilience effort, the sectional area diminishes is opened to the draining hole, the pressure release flow diminishes, then realized regulation and control to high-pressure side fuel pressure and flow, original ball valve structure has been successfully replaced, reduce energy consumption, the life-span of extension fine filter.
2. And the side wall of the slide valve body is provided with a plurality of pressure relief holes, and the pump body is provided with an annular oil drainage groove corresponding to the pressure relief holes, so that the pressure relief of the fuel oil can be smoothly realized.
3. And the pressure balance hole is formed in the side wall of the slide valve body, so that the pressure regulation in the compression area of the overflow spring can be facilitated, and the axial movement of the slide valve core is facilitated.
4. The adjusting slide valve is prepared by adopting a high-hardness material, so that high-frequency impact repeatedly borne by the adjusting slide valve in the working process is avoided, the wear resistance of the slide valve is improved, and the service life of the slide valve is ensured.
Drawings
The foregoing is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clear, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Fig. 1 is a schematic structural view of a high-pressure common rail oil delivery pump in the prior art.
Fig. 2 is a schematic structural diagram of the high-pressure common rail oil delivery pump with adjustable pressure and flow rate of the present invention.
Fig. 3 is a schematic structural diagram of an adjusting slide valve in the high-pressure common rail oil delivery pump capable of adjusting pressure and flow rate of the present invention.
Detailed Description
Referring to fig. 2 and 3, the fuel delivery pump for a high pressure common rail of this embodiment, which can adjust pressure and flow rate, includes an adjustment slide valve provided on a fuel passage 11 of a high pressure side of a pump body, the adjustment slide valve including a spool body 12, a spool 13, a relief spring 14, and a stationary plug 15.
The slide valve body 12 is fixed on the high-pressure end fuel oil channel 11, and the slide valve body 12 is a hollow tube, wherein an open end 121 of the hollow tube is communicated with the high-pressure end fuel oil channel 11, a drain hole 122 is arranged on the tube wall of the hollow tube, and the drain hole 122 is communicated with the low-pressure end fuel oil input channel 16 on the pump body. The spool 13, the overflow spring 14 and the fixed plug 15 are sequentially arranged inside the hollow pipe, the spool 13 is a cylindrical piston, the spool 13 axially moves along the hollow pipe under the bidirectional action of fuel pressure and the overflow spring 14, and meanwhile, the opening and closing actions of the oil drain hole 122 and the opening sectional area of the oil drain hole 122 are controlled, so that the regulation of the fuel pressure and the fuel flow is realized.
In this embodiment, the spool 13 is a cylindrical piston cap with one end closed and the other end open, one end of the overflow spring 14 is fixedly connected to the fixed plug 15, and the other end is embedded in the cylindrical piston cap.
The spool 13 is also provided as a stepped cylindrical piston, and the inner wall of the hollow pipe of the spool body 12 is provided as a stepped structure matching the stepped cylindrical piston. The structure is convenient for realizing the airtightness between the piston and the hollow pipe and improves the sensitivity of fuel pressure regulation.
In this embodiment, the fixed plug 15 is a fixed steel ball, and the adjusting slide valve can adjust the pre-pressure of the oil spill spring by adjusting the pressing amount of the fixed steel ball, so as to control the opening pressure of the slide valve core. The fixed steel ball is in interference fit with the inner wall of the hollow pipe.
At least two pressure relief holes 122 are arranged on the side wall of the slide valve body 12, the aperture of each pressure relief hole 122 is the same, and the central lines of the pressure relief holes are on the same plane, so that the pressure relief of fuel oil is facilitated.
And, set up the annular oil drainage groove 17 on the pump body corresponding to this slide valve body relief hole 122, this annular oil drainage groove 17 communicates with each other with low-pressure end fuel input channel 16 on this pump body, can realize the pressure release of the fuel smoothly.
Also, the side wall of the spool body 12 is provided with a pressure balance hole 18 for adjusting the pressure in the compression region of the relief spring for facilitating the axial movement of the spool. At least two pressure balance holes 18 are provided in the side wall of the spool valve body 12.
In order to prevent the adjusting slide valve from being repeatedly subjected to high-frequency impact in the working process, in the embodiment, the slide valve body 12 is made of 20Cr material, and the slide valve core 13 is made of GCr15 material, so that the wear resistance of the slide valve can be improved, and the service life of the slide valve can be prolonged.
The utility model discloses a set up the regulating slide valve on the high-pressure side fuel oil passageway of the pump body, through its spring force and hydraulic pressure force's dynamic balance, can realize regulation and control to fuel delivery pump pressure and flow. The working principle is as follows: fuel oil with certain pressure from the high-pressure end of the fuel delivery pump enters the hollow pipe of the slide valve body through the opening end 121 of the slide valve body 12 and pushes the slide valve core 13 to move, and when the slide valve core 13 moves to a certain position, the hollow pipe of the slide valve body is communicated with the oil drain hole 122, and the fuel oil is discharged from the oil drain hole 122. When the fuel pressure is high, the compressed force of the overflow spring 14 is high, the opening sectional area of the oil drain hole 122 is large, and the pressure relief flow rate is large, otherwise, when the fuel pressure is small, the opening sectional area of the oil drain hole 122 is small and the pressure relief flow rate is small under the rebounding acting force of the overflow spring 14 of the slide valve core 13, so that the regulation and control of the fuel pressure and the fuel flow rate at the high-pressure end are realized.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and those skilled in the art can make various modifications, equivalent changes and modifications using the above-described technical content, all of which fall within the scope of the present invention.
Claims (9)
1. A high pressure common rail oil transfer pump capable of adjusting pressure and flow is characterized by comprising an adjusting slide valve arranged on a high-pressure end fuel oil channel on a pump body, wherein the adjusting slide valve comprises a slide valve body, a slide valve core, an overflow spring and a fixed plug;
the slide valve body is fixed on the high-pressure end fuel oil channel and is a hollow pipe, one opening end of the hollow pipe is communicated with the high-pressure end fuel oil channel, and an oil drainage hole is formed in the pipe wall of the hollow pipe and is communicated with a low-pressure end fuel oil input channel on the pump body; the sliding valve core, the overflow spring and the fixed plug are sequentially arranged inside the hollow pipe, the sliding valve core is a cylindrical piston, the sliding valve core axially moves along the hollow pipe under the bidirectional action of fuel pressure and the overflow spring, and meanwhile, the opening and closing actions of the oil drain hole and the opening sectional area of the oil drain hole are controlled, so that the regulation of fuel pressure and flow is realized.
2. The oil pump of claim 1, wherein the spool is a cylindrical piston cap having one end closed and the other end open, one end of the overflow spring is connected to the fixed plug, and the other end is embedded in the cylindrical piston cap.
3. The oil feed pump for a high pressure common rail capable of adjusting pressure and flow rate according to claim 2, wherein the spool is provided as a stepped cylindrical piston, and an inner wall of the hollow pipe of the spool body is provided as a stepped structure matching with the stepped cylindrical piston.
4. The oil transfer pump with adjustable pressure and flow for the high-pressure common rail of claim 1, wherein the fixing plug is a fixing steel ball, and the fixing steel ball is in interference fit with the inner wall of the hollow tube.
5. The oil transfer pump with adjustable pressure and flow for the high-pressure common rail according to any one of claims 1 to 4, wherein at least two oil drainage holes are arranged on the side wall of the spool body, the oil drainage holes have the same aperture, and the center lines of the oil drainage holes are on the same plane.
6. The oil transfer pump with adjustable pressure and flow for the high-pressure common rail of claim 5, wherein an annular oil drainage groove is formed in the pump body corresponding to the oil drainage hole of the slide valve body, and the annular oil drainage groove is communicated with a fuel oil input channel at a low-pressure end of the pump body.
7. The oil pump of claim 6, wherein a pressure balance hole for adjusting a pressure of a compression region of the relief spring is further provided in a side wall of the spool body.
8. The oil pump of claim 7, wherein at least two pressure balance holes are formed in a side wall of the spool body.
9. The oil feed pump for a high pressure common rail capable of adjusting pressure and flow rate according to claim 1, wherein the spool body is made of 20Cr material, and the spool body is made of GCr15 material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020700827.4U CN212389459U (en) | 2020-04-30 | 2020-04-30 | High pressure of adjustable pressure and flow is defeated oil pump for rail altogether |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020700827.4U CN212389459U (en) | 2020-04-30 | 2020-04-30 | High pressure of adjustable pressure and flow is defeated oil pump for rail altogether |
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| CN212389459U true CN212389459U (en) | 2021-01-22 |
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| CN202020700827.4U Active CN212389459U (en) | 2020-04-30 | 2020-04-30 | High pressure of adjustable pressure and flow is defeated oil pump for rail altogether |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396222A (en) * | 2020-04-30 | 2020-07-10 | 北油电控燃油喷射系统(天津)有限公司 | High pressure of adjustable pressure and flow is defeated oil pump for rail altogether |
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2020
- 2020-04-30 CN CN202020700827.4U patent/CN212389459U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396222A (en) * | 2020-04-30 | 2020-07-10 | 北油电控燃油喷射系统(天津)有限公司 | High pressure of adjustable pressure and flow is defeated oil pump for rail altogether |
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