CN212202316U - VE dispensing pump machinery fuel cut-off mechanism - Google Patents
VE dispensing pump machinery fuel cut-off mechanism Download PDFInfo
- Publication number
- CN212202316U CN212202316U CN201921603221.2U CN201921603221U CN212202316U CN 212202316 U CN212202316 U CN 212202316U CN 201921603221 U CN201921603221 U CN 201921603221U CN 212202316 U CN212202316 U CN 212202316U
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- oil
- valve
- steel ball
- fuel cut
- piston
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Abstract
The utility model relates to a VE distribution pump machinery fuel cut-off mechanism, mechanical fuel cut-off valve install on oil pump distribution shell, the top that lies in the oil feed oil circuit in the oil pump distribution shell be equipped with one with the parallel control oil circuit that sets up of oil feed oil circuit, and oil pressure in the control oil circuit is the same with the pressure of oil pump chamber, and the end of control oil circuit is equipped with a mechanical fuel cut-off valve, and this mechanical fuel cut-off valve replaces original solenoid valve. The utility model discloses mechanical fuel cut-off mechanism has simple structure, good reliability, the lower characteristics of cost.
Description
Technical Field
The utility model discloses a VE dispensing pump machinery fuel cut-off mechanism belongs to VE dispensing pump field.
Background
The existing electric control VE pump products use an electromagnetic valve to cut off an oil inlet oil way of a plunger, so that oil supply is stopped when an oil injection quantity control executing mechanism is blocked, and runaway is prevented. When the electromagnetic valve is electrified, the oil pump works normally; when the electromagnetic valve is powered off, the valve core is seated under the action of the spring force to cut off the oil inlet of the plunger of the oil pump, and the oil pump stops supplying oil. The electromagnetic valve needs a driver to manually power off through a key switch, and the overspeed of the engine can be serious due to long reaction time of people, so that the engine protection is not facilitated.
SUMMERY OF THE UTILITY MODEL
To the technical problem, the utility model discloses a VE distribution pump machinery fuel cut-off mechanism replaces original solenoid valve, and this machinery fuel cut-off mechanism has simple structure, and the good reliability, and the cost is lower to after the rotational speed surpassed the restriction, do not need operating personnel's control, automatic response cuts off the oil pump fuel immediately and supplies with to the engine, make the engine flame-out.
In order to realize the technical purpose, the utility model adopts the following technical scheme:
a VE distribution pump mechanical oil-cut-off mechanism is installed on an oil pump distribution shell and used for mechanically cutting off an oil inlet oil way of a plunger piston and realizing that oil supply is stopped when an oil injection quantity control execution mechanism is blocked; the top that lies in the oil feed oil circuit in the oil pump distribution shell is equipped with one with the parallel control oil circuit that sets up of oil feed oil circuit, and oil pressure in the control oil circuit is the same with the pressure of oil pump chamber, and the end of control oil circuit is equipped with a mechanical fuel cut-off valve, mechanical fuel cut-off valve includes:
the valve body is provided with openings at two ends, one end of the valve body is butted with the control oil way, the other end of the valve body is hermetically connected by a pressure regulating screw, a piston and a first spring are sequentially connected in series in the valve body along the oil pressure direction of the control oil way, the piston is provided with a vertical through hole which is arranged along the radial direction of the piston, and a first steel ball is arranged in the vertical through hole;
under the change of the oil pressure of the control oil way, the piston can move in the valve body along the axial direction of the valve body so as to drive the first steel ball to move; a steel ball release opening is formed in one side valve wall, located in the gravity direction of the steel ball, of the valve body, and the steel ball release opening is located right above the one-way valve seat between the oil inlet way and the plunger oil inlet;
stop gear for:
when the oil pressure of the control oil path is lower than the elastic force of the first spring, the first position of the piston is limited,
When the oil pressure of the control oil way is higher than the elastic force of the first spring, the second position of the piston is limited so that the steel ball in the piston just falls into the one-way valve seat from the steel ball release port, and the oil inlet of the plunger is closed;
and a process hole is formed in the oil pump distribution shell above the valve seat, a second steel ball is arranged in the process hole, the second steel ball is in interference fit with the process hole, and the second steel ball is used for sealing to prevent fuel oil leakage.
A mechanical fuel cut-off valve installation cavity is processed on the oil pump distribution shell, the mechanical fuel cut-off valve is installed in the mechanical fuel cut-off valve installation cavity through a flange structure, and a flange surface is screwed on the oil pump distribution shell through two screws.
And a second spring for applying positive downward pressure to the first steel ball is arranged between the top of the first steel ball and the inner wall of the valve body.
The control oil way and the oil inlet oil way have the same oil way sectional area.
The stop gear includes: one end of the guide pin is fixedly connected with the piston, and the other end of the guide pin is arranged upwards;
and a guide limiting groove for limiting the guide pin is arranged on one side valve wall of the valve body, which is opposite to the steel ball release port.
Be equipped with spring support seat between first spring and the pressure regulating screw, be equipped with the sealing washer between spring support seat and the valve body inner wall.
Has the advantages that:
the utility model discloses replace the solenoid valve with mechanical fuel cut-off valve, reduced manufacturing cost, simplified electrical system, reduced use cost, improved system stability, quick response nature and security.
Drawings
Fig. 1 is an assembly view of a mechanical fuel cut-off valve and an oil pump distribution housing when a first steel ball of the present invention is in a first position;
wherein, 1, the oil pump distributes the outer casing; 2. a mechanical fuel cut-off valve; 3. A dispensing sleeve; 1.1, controlling an oil way; 1.2, an oil inlet way; 1.3, a second steel ball; 1.4, a one-way valve seat; 1.5, a mechanical fuel cut-off valve mounting cavity;
fig. 2 is an assembly view of the mechanical fuel cut-off valve and the oil pump distribution housing when the first steel ball of the utility model is in the second position;
wherein, 2.2, a first steel ball;
FIG. 3 is a top view of FIG. 2;
2.10, vertical through holes; 2.11, screw holes;
fig. 4 is a schematic structural view of the mechanical fuel cut-off valve when the first steel ball of the present invention is at the first position;
wherein, 2.1, a piston; 2.2, a first steel ball; 2.3, a second spring; 2.4, a guide pin; 2.5, a valve body; 2.6, pressure regulating screws; 2.7, locking a nut; 2.8, sealing rings; 2.9, a first spring;
FIG. 5 is a schematic structural view of the mechanical fuel cut-off valve when the first steel ball is at the second position;
wherein, 2.5.1, guide the spacing groove; 2.5.2, a steel ball release port;
FIG. 6 is a graph of electrically controlled VE pump chamber pressure;
fig. 7 is the connecting structure schematic diagram of the oil cut-off valve and the oil pump distribution shell after being installed by flanges.
Detailed Description
The following description is combined with the drawings and the specific embodiments of the specification to realize the mechanical oil cut-off mechanism of the VE dispensing pump of the present invention
The utility model relates to a full mechanical fuel cut-off valve of a section, it is dead at oil pump oil mass actuating mechanism card, when unable fuel cut-off, this fuel cut-off valve plays, stops the oil pump fuel feeding, makes the engine shut down.
As shown in fig. 5, the mechanical fuel cut-off valve of the present invention is mounted on the oil pump distribution housing 1 through a flange structure, and is used for mechanically cutting off the oil inlet passage of the plunger, so as to stop supplying fuel when the fuel injection amount control actuator is stuck; the top that lies in the oil feed oil circuit in the oil pump distribution shell is equipped with one with the parallel control oil circuit that sets up of oil feed oil circuit, and oil pressure in the control oil circuit is the same with the pressure of oil pump chamber, and the end of control oil circuit is equipped with a mechanical fuel cut-off valve, as shown in fig. 3~ 5, mechanical fuel cut-off valve includes:
the valve body is provided with openings at two ends, one end of the valve body is butted with the control oil way, the other end of the valve body is hermetically connected by a pressure regulating screw, a piston and a first spring are sequentially connected in series in the valve body along the oil pressure direction of the control oil way, the piston is provided with a vertical through hole which is arranged along the radial direction of the piston, and a first steel ball is arranged in the vertical through hole;
under the change of the oil pressure of the control oil way, the piston can move in the valve body along the axial direction of the valve body so as to drive the first steel ball to move; a steel ball release opening is formed in one side valve wall, located in the gravity direction of the steel ball, of the valve body, and the steel ball release opening is located right above the one-way valve seat between the oil inlet way and the plunger oil inlet;
stop gear for:
when the oil pressure of the control oil path is lower than the elastic force of the first spring, the first position of the piston is limited,
When the oil pressure of the control oil way is higher than the elastic force of the first spring, the second position of the piston is limited so that the steel ball in the piston just falls into the one-way valve seat from the steel ball release port, and the oil inlet of the plunger is closed;
and a process hole is formed in the oil pump distribution shell above the valve seat, a second steel ball is arranged in the process hole, the second steel ball is in interference fit with the process hole, and the second steel ball is used for sealing to prevent fuel oil leakage.
As the utility model discloses a technical scheme's a preferred embodiment, it is right to be equipped with between the top of first steel ball and the valve body inner wall first steel ball applys the second spring of forward downforce.
As an embodiment of the present invention, the control oil path and the oil inlet oil path have the same oil path sectional area.
As a preferred embodiment of the technical solution of the present invention, the limiting mechanism includes: one end of the guide pin is fixedly connected with the piston, and the other end of the guide pin is arranged upwards; and a guide limiting groove for limiting the guide pin is arranged on one side valve wall of the valve body, which is opposite to the steel ball release port. Be equipped with spring support seat between first spring and the pressure regulating screw, be equipped with the sealing washer between spring support seat and the valve body inner wall.
The utility model relates to an oil cut-off method based on the mechanical oil cut-off mechanism of the VE dispensing pump,
when the pressure on the left side of the piston 2.1 is low, the piston is pressed to the left by the first spring 2.9, as shown in the position in fig. 3; at the moment, the piston 2.1 is limited by the guide pin 2.4 and can not move leftwards any more;
when the pressure rises to the left of the piston 2.1, the piston moves to the right in balance of hydraulic and spring forces. As the pressure on the left side of the piston 2.1 rises, when the piston 2.1 moves to the position shown in the position of fig. 4, the first steel ball 2.2 is now released out through the steel ball release hole 2.5.2 in the valve body 2.5 under the action of the second spring 2.3. The pressure on the left side of the piston is now the threshold pressure, which can be adjusted by means of the pressure adjusting screw 2.6. The locking nut 2.7 is used for locking the pressure regulating screw and fixing the valve limit pressure of the fuel cut-off valve;
as shown in fig. 1-2, a control oil path 1.1, an oil inlet path 1.2, a one-way valve seat 1.4 and an oil cut-off valve installation chamber 1.5 are processed on the distribution shell 1, and a fabrication hole is blocked by a steel ball 1.3. When the pressure in the control oil path 1.1 of the distribution shell is less than the pressure of the pump cavity of the oil pump, as shown in the position 1 in fig. 4, the first steel ball 2.2 is in the oil cut-off valve, the fuel oil passes through the oil inlet oil path 1.2 and the one-way valve seat 1.4 to supply the oil to the plunger, and the oil pump works normally.
The electronically controlled VE pump chamber pressure increases as the oil pump speed increases, as shown in fig. 5. When the oil quantity actuating mechanism is locked and does not work, the rotating speed of the oil pump rises along with the rotating speed rise of the engine under the constant oil supply quantity, the pressure of the pump cavity rises along with the rising of the rotating speed of the engine, when the pressure of the pump cavity is larger than the valve limit pressure, as shown in the position of figure 2, the piston in the mechanical oil-break valve moves to the right side at the moment, the first steel ball 2.2 is released by the oil-break valve, the first steel ball 2.2 falls into the one-way valve seat 1.4, the one-way valve is closed, and at the moment, the fuel cannot be. The oil pump stops supplying oil, and the engine is automatically stopped. The maximum rotating speed of the engine can be adjusted by adjusting the valve limit pressure of the fuel cut-off valve.
When the fuel cut-off valve plays a role, the oil pump can not work, must manual intervention, guarantees the oil mass executor normal work back, pulls down the fuel cut-off valve, manual with the steel ball reduction, after reinstalling the fuel cut-off valve, the oil pump returns normal work, specifically is:
unscrewing and disassembling two fixing screws on the flange surface of the mechanical oil-break valve, and taking the mechanical oil-break valve out of the oil pump distribution shell;
pouring the first steel ball out of an oil outlet valve mounting hole of the oil pump distribution shell;
manually pressing the piston until a piston spring hole is aligned with a spring release hole on the valve body, and putting the steel ball in; the mechanical fuel cut-off valve is restored;
the mechanical fuel cut-off valve is arranged in the distribution shell, and the flange of the mechanical fuel cut-off valve is screwed on the distribution shell through two screws;
and manually reducing the first steel ball, and reinstalling the oil cut-off valve to enable the oil pump to work normally.
The expansion amount of the first spring is adjusted through the pressure adjusting screw, so that the valve limit pressure of the fuel cut-off valve is adjusted, and the maximum rotating speed of the engine is adjusted.
The utility model discloses not only use and play the effect that prevents the engine driving on the automatically controlled VE pump. The hydraulic pneumatic control valve can also be applied to the field of hydraulic pneumatic control and has the function of a mechanical oil cut-off valve. The following conditions may apply:
the pressure limiting protection function is realized on the hydraulic or pneumatic downstream;
after the mechanical fuel cut-off valve acts, the pressure of the system is not influenced, and other parts of the system can work normally;
the mechanical fuel cut-off valve can be restored only by manual intervention after the mechanical fuel cut-off valve is in effect;
the electromagnetic valve is suitable for the environment with explosion-proof requirements and replaces an electromagnetic valve to work.
Claims (6)
1. A VE distribution pump mechanical oil-cut-off mechanism is installed on an oil pump distribution shell and used for mechanically cutting off an oil inlet oil way of a plunger piston and realizing that oil supply is stopped when an oil injection quantity control execution mechanism is blocked; the oil pump is characterized in that a control oil way arranged in parallel with the oil inlet oil way is arranged above the oil inlet oil way in the oil pump distribution shell, the oil pressure in the control oil way is the same as the pressure of an oil pump cavity, and a mechanical oil cut-off valve is arranged at the tail end of the control oil way and comprises:
the valve body is provided with openings at two ends, one end of the valve body is butted with the control oil way, the other end of the valve body is hermetically connected by a pressure regulating screw, a piston and a first spring are sequentially connected in series in the valve body along the oil pressure direction of the control oil way, the piston is provided with a vertical through hole which is arranged along the radial direction of the piston, and a first steel ball is arranged in the vertical through hole;
under the change of the oil pressure of the control oil way, the piston can move in the valve body along the axial direction of the valve body so as to drive the first steel ball to move; a steel ball release opening is formed in one side valve wall, located in the gravity direction of the steel ball, of the valve body, and the steel ball release opening is located right above the one-way valve seat between the oil inlet way and the plunger oil inlet;
stop gear for:
when the oil pressure of the control oil path is lower than the elastic force of the first spring, the first position of the piston is limited,
When the oil pressure of the control oil way is higher than the elastic force of the first spring, the second position of the piston is limited so that the steel ball in the piston just falls into the one-way valve seat from the steel ball release port, and the oil inlet of the plunger is closed;
and a process hole is formed in the oil pump distribution shell above the valve seat, a second steel ball is arranged in the process hole, the second steel ball is in interference fit with the process hole, and the second steel ball is used for sealing to prevent fuel oil leakage.
2. The VE dispensing pump mechanical fuel cut-off mechanism of claim 1, wherein the oil pump dispensing housing is machined with a mechanical fuel cut-off valve mounting cavity, the mechanical fuel cut-off valve is mounted in the mechanical fuel cut-off valve mounting cavity by a flange structure, and a flange face is screwed onto the oil pump dispensing housing by two screws.
3. The VE dispensing pump mechanical fuel cut-off mechanism of claim 1, wherein a second spring is disposed between the top of the first steel ball and the inner wall of the valve body to apply a positive downward force to the first steel ball.
4. The VE dispensing pump mechanical fuel cut-off mechanism of claim 1, wherein the control oil path and the oil inlet oil path have the same oil path cross-sectional area.
5. The VE dispensing pump mechanical fuel cut-off mechanism of claim 1, wherein the limiting mechanism comprises: one end of the guide pin is fixedly connected with the piston, and the other end of the guide pin is arranged upwards;
and a guide limiting groove for limiting the guide pin is arranged on one side valve wall of the valve body, which is opposite to the steel ball release port.
6. The VE dispensing pump mechanical fuel cut-off mechanism of claim 1, wherein a spring support seat is provided between the first spring and the pressure regulating screw, and a seal ring is provided between the spring support seat and the inner wall of the valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603221.2U CN212202316U (en) | 2019-09-25 | 2019-09-25 | VE dispensing pump machinery fuel cut-off mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921603221.2U CN212202316U (en) | 2019-09-25 | 2019-09-25 | VE dispensing pump machinery fuel cut-off mechanism |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212202316U true CN212202316U (en) | 2020-12-22 |
Family
ID=73806879
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921603221.2U Withdrawn - After Issue CN212202316U (en) | 2019-09-25 | 2019-09-25 | VE dispensing pump machinery fuel cut-off mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212202316U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671251A (en) * | 2019-09-25 | 2020-01-10 | 南京威孚金宁有限公司 | VE dispensing pump mechanical oil cut-off mechanism and oil cut-off method thereof |
-
2019
- 2019-09-25 CN CN201921603221.2U patent/CN212202316U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671251A (en) * | 2019-09-25 | 2020-01-10 | 南京威孚金宁有限公司 | VE dispensing pump mechanical oil cut-off mechanism and oil cut-off method thereof |
| CN110671251B (en) * | 2019-09-25 | 2023-07-07 | 南京威孚金宁有限公司 | Mechanical oil-cutting mechanism of VE dispensing pump and oil-cutting method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20201222 Effective date of abandoning: 20230707 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20201222 Effective date of abandoning: 20230707 |