CN212376769U - High-pressure pump body and pump head for diesel pump - Google Patents
High-pressure pump body and pump head for diesel pump Download PDFInfo
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- CN212376769U CN212376769U CN202020744294.XU CN202020744294U CN212376769U CN 212376769 U CN212376769 U CN 212376769U CN 202020744294 U CN202020744294 U CN 202020744294U CN 212376769 U CN212376769 U CN 212376769U
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Abstract
The utility model relates to a high-pressure pump body for diesel pump, including the pump body main part, be equipped with first valve body installation cavity, second valve body installation cavity and plunger installation cavity in the pump body main part, be equipped with first oil duct between first valve body installation cavity and the second valve body installation cavity, first valve body installation cavity and second valve body installation cavity respectively with the plunger installation cavity intercommunication; the pump body main body is also provided with an oil inlet channel, and the oil inlet channel is communicated with the first valve body mounting cavity or the second valve body mounting cavity; the high-pressure pump head for the diesel pump adopting the high-pressure pump body is further designed, the high-pressure pump head further comprises an oil inlet valve and an oil outlet valve, the oil inlet valve is installed in the first valve body installation cavity or the second valve body installation cavity, the oil outlet valve is installed in the second valve body installation cavity or the first valve body installation cavity, and a plunger is further arranged in the plunger installation cavity; the installation positions of the low-pressure oil inlet valve and the high-pressure oil outlet valve can be interchanged, one high-pressure pump body can meet two oil outlet modes, the investment on a production line is reduced, and the production cost is reduced.
Description
Technical Field
The utility model relates to a high pressure body and pump head for diesel pump.
Background
The high-pressure pump head is one of the commonly used parts on the diesel pump, mainly used for changing the low-pressure oil that the low-pressure oil pump input into the high-pressure oil that the fuel sprayer needs.
At present, due to the limitation of the spatial arrangement of an engine, different customers have different requirements on the directions of high-pressure oil outlets on a high-pressure pump head, so that different high-pressure pump bodies need to be researched and manufactured according to the requirements of the customers, and the cost is higher.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the not enough of above-mentioned prior art existence, provide a diesel pump with interchangeable diesel oil pump body of inlet valve and delivery valve mounted position.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a high-pressure pump body for a diesel pump comprises a pump body main body, wherein a first valve body installation cavity, a second valve body installation cavity and a plunger installation cavity are arranged on the pump body main body; still be equipped with the oil feed passageway in the pump body main part, the oil feed passageway with first valve body installation cavity or second valve body installation cavity intercommunication.
Further, the axial included angle between the first valve body installation cavity and the second valve body installation cavity is 30-180 degrees.
Further, the axial included angle between the first valve body installation cavity and the second valve body installation cavity is 90 degrees.
The beneficial effect of the high-pressure pump body is: the low-pressure oil inlet valve and the high-pressure oil outlet valve can be respectively arranged in the first valve body installation cavity and the second valve body installation cavity, and also can be respectively arranged in the second valve body installation cavity and the first valve body installation cavity, namely, the installation positions of the low-pressure oil inlet valve and the high-pressure oil outlet valve can be interchanged, one high-pressure pump body can meet two oil outlet modes, the investment on a production line is reduced, and the production cost is reduced.
The utility model discloses still design a high-pressure pump head for diesel pump, including the above-mentioned high-pressure pump body, still include inlet valve and delivery valve, the inlet valve is installed in first valve body installation cavity or the second valve body installation cavity, the delivery valve is installed in second valve body installation cavity or the first valve body installation cavity, still be equipped with the plunger in the plunger installation cavity.
Further, the oil outlet valve comprises a valve body and a valve core, a valve cavity is arranged in the valve body and comprises a sealing cavity and a guide cavity, the valve core comprises a core body and a sealing head, the core body is arranged in the guide cavity, the outer diameter of the core body is matched with the inner diameter of the guide cavity, the sealing cavity is a conical cavity, and the sealing head is bullet-shaped.
Further, a core cavity is formed in the core body, a spring is arranged in the core cavity, a spring plug is further arranged at an oil outlet of the core cavity, and the outer diameter of the spring plug is matched with the diameter of the guide cavity.
Further, the core with be equipped with the changeover portion between the sealed head, the changeover portion includes toper changeover portion and drum changeover portion, the toper changeover portion includes big footpath end and path end, the big footpath end of toper changeover portion with the core is connected, the path end with the drum changeover portion is connected, the drum changeover portion with sealed head is connected.
Further, an oil inlet hole communicated with the core cavity is formed in the conical transition section.
Further, an oil inlet passage which is coaxial and communicated with the valve cavity is further arranged on the valve body.
Further, the inner wall between the guide cavity and the sealing cavity is in arc transition.
Further, the outer wall between the conical transition section and the cylindrical transition section is in circular arc transition.
The high-pressure pump head has the beneficial effects that: the positions of an oil inlet valve and an oil outlet valve of the pump head can be interchanged, so that two oil outlet directions can be met; the adopted oil outlet valve presses the spring plug pressing spring by means of high-pressure oil pressure in a top-end high-pressure oil rail so as to press the valve core, so that the bullet-shaped sealing head and the conical sealing cavity are linearly sealed, the core body of the valve core is matched with the guide cavity, the guide of the valve core is better, the sealing head and the sealing cavity have good coaxiality, the sealing effect is good, and the service life of the oil outlet valve is long; the pump head has long service life.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a high pressure pump body according to the present invention;
FIG. 3 is a schematic structural view of the oil outlet valve of the present invention;
FIG. 4 is an enlarged view of a portion of FIG. 3 at B;
fig. 5 is an exploded view of the present invention;
FIG. 6 is a schematic structural view of the middle valve body of the present invention
Fig. 7 is a schematic structural view of the valve core of the present invention;
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a high-pressure pump body for a diesel pump comprises a pump body main body 1, wherein a first valve body installation cavity 1-1, a second valve body installation cavity 1-2 and a plunger installation cavity 1-5 are arranged on the pump body main body 1, a first oil duct 1-3 is arranged between the first valve body installation cavity 1-1 and the second valve body installation cavity 1-2, and the first valve body installation cavity 1-1 and the second valve body installation cavity 1-2 are respectively communicated with the plunger installation cavity 1-5; the pump body main body 1 is further provided with oil inlet channels 1-4, and the oil inlet channels 1-4 are communicated with the first valve body installation cavity 1-1.
The axial included angle between the first valve body installation cavity 1-1 and the second valve body installation cavity 1-2 is 90 degrees.
When the oil inlet valve 2 and the oil outlet valve 3 are respectively installed in the first valve body installation cavity 1-1 and the second valve body installation cavity 1-2, as shown in fig. 2, low-pressure oil enters the oil inlet valve 2 from the oil inlet channel 1-4, enters the plunger installation cavity 1-5 after coming out of the oil inlet valve 2, and moves the plunger 4 downwards; when the plunger 4 moves upwards, pressure oil enters the oil outlet valve 3 and flows out of the oil outlet valve 3 to provide high-pressure oil for the oil injector;
when the oil inlet valve 2 and the oil outlet valve 3 are respectively arranged in the second valve body installation cavity 1-2 and the first valve body installation cavity 1-1, low-pressure oil enters the first valve body installation cavity 1-1 from the oil inlet channel 1-4 (at the moment, the low-pressure oil only surrounds the oil outlet valve 3 and cannot enter the oil outlet valve 3), enters the oil inlet valve 2 from the first oil channel 1-4, enters the oil plunger installation cavity 1-5 after exiting from the oil inlet valve 2, and moves the plunger 4 downwards; when the plunger 4 moves upwards, pressure oil enters the outlet valve 3 and flows out of the outlet valve 3 to provide high pressure oil for the injector.
As shown in fig. 1-7, the utility model discloses still relate to a high-pressure pump head for diesel pump, including the above-mentioned high-pressure pump body, still include oil inlet valve 2 and delivery valve 3, oil inlet valve 2 is installed in the first valve body installation cavity 1-1, delivery valve 3 is installed in the second valve body installation cavity 1-2, still be equipped with plunger 4 in the plunger installation cavity 1-5.
The oil outlet valve 3 comprises a valve body 3-1, a valve core 3-2, a spring 3-3 and a spring plug 3-4, a valve cavity 3-11 is arranged in the valve body 3-1, the valve cavity 3-11 comprises a sealing cavity 3-112 and a guide cavity 3-111, and the inner wall of the guide cavity 3-111 and the sealing cavity 3-112 is in arc transition;
the valve core 3-2 comprises a core body 3-21 and a sealing head 3-22, the core body 3-21 is arranged in the guide cavity 3-111, the outer diameter of the core body 3-21 is matched with the inner diameter of the guide cavity 3-111, the core body 3-21 is cylindrical, the sealing cavity 3-112 is a conical cavity, and the sealing head 3-22 is bullet-shaped;
the core body 3-21 is provided with a core cavity 3-24, the spring is arranged in the core cavity 3-24, the opening of the core cavity is also provided with the spring plug 3-4, the outer diameter of the spring plug 3-4 is matched with the diameter of the guide cavity 3-111, and the inner hole diameter of the spring plug 3-4 is smaller than the outer diameter of the spring 3-3.
Transition sections 3-23 are arranged between the core body 3-21 and the sealing head 3-22, the transition sections 3-23 comprise conical transition sections 3-231 and cylindrical transition sections 3-232, and the outer walls of the conical transition sections 3-231 and the cylindrical transition sections 3-232 are in arc transition;
the conical transition section 3-231 comprises a large-diameter end and a small-diameter end, the large-diameter end of the conical transition section 3-231 is connected with the core body 3-21, the small-diameter end is connected with the cylindrical transition section 3-232, and the cylindrical transition section 3-232 is connected with the sealing head 3-22. And oil inlet holes 3-25 communicated with the core cavities 3-24 are formed in the conical transition sections 3-232.
The valve body 1 is also provided with an oil inlet passage 1-2 which is coaxial and communicated with the valve cavity 1-1.
The working process of the utility model is as follows:
when the diesel oil high-pressure pump pumps oil, the valve core 3-2 is pressed on the sealing surface of the valve body 3-1 under the combined action of the spring 3-3 and high-pressure oil in the valve cavity 3-11, so that the backflow of the high-pressure oil on the back side is realized; when the diesel high-pressure pump pumps oil, when the pressure in the oil inlet channel 3-12 is larger than the sum of the hydraulic pressure generated by the high-pressure oil in the valve cavity 3-11 and the spring force generated by the spring 3-3, the valve core 3-2 is pushed away, and fuel oil enters the valve cavity 3-11 from the oil inlet channel 3-12 through the oil inlet air 3-25 on the valve core 3-2, so that the output of the high-pressure fuel oil is realized
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A high-pressure pump body for a diesel pump is characterized by comprising a pump body main body, wherein a first valve body installation cavity, a second valve body installation cavity and a plunger installation cavity are arranged on the pump body main body; still be equipped with the oil feed passageway in the pump body main part, the oil feed passageway with first valve body installation cavity or second valve body installation cavity intercommunication.
2. The high pressure pump body for a diesel pump of claim 1, wherein the axial angle of the first and second valve body mounting cavities is between 30-180 °.
3. The high pressure pump body for a diesel pump of claim 2, wherein the axial angle between the first and second valve body mounting cavities is 90 °.
4. A high pressure pump head for a diesel pump, comprising the high pressure pump body according to any one of claims 1 to 3, further comprising an oil inlet valve and an oil outlet valve, wherein the oil inlet valve is installed in the first valve body installation cavity or the second valve body installation cavity of the high pressure pump body, the oil outlet valve is installed in the second valve body installation cavity or the first valve body installation cavity, and a plunger is further disposed in the plunger installation cavity.
5. A high pressure pump head for a diesel pump according to claim 4, wherein the oil outlet valve includes a valve body and a valve core, a valve cavity is provided in the valve body, the valve cavity includes a sealing cavity and a guiding cavity, the valve core includes a core body and a sealing head, the core body is provided in the guiding cavity, an outer diameter of the core body is adapted to an inner diameter of the guiding cavity, the sealing cavity is a conical cavity, and the sealing head is bullet-shaped.
6. A high pressure pump head for a diesel pump as claimed in claim 5, wherein the core body is provided with a core chamber, a spring is provided in the core chamber, a spring plug is further provided at an oil outlet of the core chamber, and an outer diameter of the spring plug is adapted to a diameter of the guide chamber.
7. A high pressure pump head for a diesel pump as set forth in claim 6, wherein a transition section is provided between the core and the sealing head, the transition section comprising a tapered transition section and a cylindrical transition section, the tapered transition section comprising a major diameter end and a minor diameter end, the major diameter end of the tapered transition section being connected to the core, the minor diameter end being connected to the cylindrical transition section, the cylindrical transition section being connected to the sealing head.
8. A high pressure pump head for a diesel pump as claimed in claim 7, wherein the tapered transition section is provided with an oil inlet in communication with the core chamber.
9. A high pressure pump head for a diesel pump as claimed in any one of claims 5 to 8, wherein the valve body is further provided with an oil inlet passage coaxial with and communicating with the valve chamber.
10. A high pressure pump head for a diesel pump as claimed in any one of claims 5 to 8, wherein the inner wall between the guide chamber and the seal chamber is radiused.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020744294.XU CN212376769U (en) | 2020-05-08 | 2020-05-08 | High-pressure pump body and pump head for diesel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020744294.XU CN212376769U (en) | 2020-05-08 | 2020-05-08 | High-pressure pump body and pump head for diesel pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212376769U true CN212376769U (en) | 2021-01-19 |
Family
ID=74176511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020744294.XU Active CN212376769U (en) | 2020-05-08 | 2020-05-08 | High-pressure pump body and pump head for diesel pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212376769U (en) |
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2020
- 2020-05-08 CN CN202020744294.XU patent/CN212376769U/en active Active
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