High-pressure methanol pump

Abstract

The invention discloses a high-pressure methanol pump which is used for being directly installed on an engine and comprises a pump body upper cover component, a pressure stabilizing component, an electromagnetic valve component, a valve rod component, an oil inlet valve component, an oil outlet valve component, a pressure release valve component and a plunger component. The invention has the advantages of reliable control and optimized assembly.

Description

Technical Field

[0001] This invention relates to the field of new energy fuel injection systems for automobile engines, and in particular to a high-pressure methanol pump. Background Technology

[0002] Currently, my country's rapidly developing automotive industry faces two major constraints: energy and the environment. The country is vigorously promoting the application of methanol fuel, which uses coal as its primary raw material. Methanol, with the chemical formula CH3OH, is the simplest saturated monohydric alcohol, containing up to 50% oxygen, making it easily and completely combustible. Its combustion products are mainly carbon dioxide and water, making it an internationally recognized clean fuel.

[0003] Methanol fuel presents several challenges as an automotive energy source. For example, compared to other fuels, methanol is more corrosive, placing higher demands on the materials used in engine components; methanol has lower viscosity and poorer lubrication, requiring higher wear resistance in moving parts; and methanol has a high latent heat of vaporization, affecting the engine's low-temperature starting performance.

[0004] Methanol is increasingly being used as an alternative fuel for vehicles both domestically and globally. However, there are currently no reliable high-pressure methanol pumps on the market. The main problems are its susceptibility to methanol fuel corrosion, assembly difficulties, and parts wear, which can easily lead to abnormal operation of methanol engines. Consequently, in-cylinder methanol direct injection systems have not been widely adopted. Summary of the Invention

[0005] The purpose of this invention is to address the problems in the prior art by providing a high-pressure methanol pump with reliable control and optimized assembly.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A high-pressure methanol pump for direct mounting to an engine, comprising:

[0008] A pump body cover assembly, comprising an oil inlet connector, a pump body cover, and an oil filter, wherein the oil inlet connector is welded to the pump body cover.

[0009] A pressure stabilizing component, comprising a pressure stabilizing disc pressure ring, a pressure stabilizing disc seat ring, and a pressure stabilizing disc structure, wherein the pressure stabilizing component is located within the cavity of the pump body upper cover component;

[0010] A solenoid valve component, comprising a coil, an iron core, a spring, a spring washer, a connector, a valve body, and a guide plate, wherein the coil, when energized, causes the iron core to generate an electromagnetic attraction.

[0011] A valve stem assembly, comprising a valve stem and an armature, wherein the valve stem head is provided with an arc protrusion, and the armature is sleeved on the valve stem and can drive the valve stem to move up and down together, and the armature is provided with a flow divider hole that runs through the upper and lower parts;

[0012] An oil inlet valve assembly, comprising an oil inlet valve seat, an oil inlet valve plate, a valve plate spring, and an oil inlet valve spring seat, wherein the oil inlet valve spring is located between the oil inlet valve plate and the oil inlet valve spring seat, and the oil inlet valve plate is in planar sealing with the oil inlet valve seat.

[0013] An oil outlet valve assembly, comprising an oil outlet valve seat, an oil outlet valve spring, an oil outlet valve ball, an oil outlet valve lower seat, and an oil outlet connector, wherein the valve ball is sealed to the conical surfaces of the oil outlet valve seat and the oil outlet valve lower seat;

[0014] A pressure relief valve assembly, comprising a pressure relief valve seat, a pressure relief valve ball, a spring seat, and a pressure relief valve spring, wherein the pressure relief valve seat and the pressure relief valve ball are sealed by conical surfaces;

[0015] A plunger assembly includes a plunger, a plunger sleeve, an upper plunger spring seat, a plunger retaining ring, a skeleton oil seal, a plunger spring, and a lower plunger spring seat. There is a gap between the plunger and the plunger sleeve, allowing for free reciprocating motion. The plunger and the lower plunger spring seat are interference-fitted. The plunger retaining ring and the skeleton oil seal are fixed within the upper plunger spring seat.

[0016] In a preferred embodiment of the present invention, the pump body cover includes a pump body and a flange, wherein the flange is welded to the pump body.

[0017] In a preferred embodiment of the present invention, an oil outlet valve seat assembly hole and an oil outlet valve lower seat assembly hole are provided on the pump body, and both the oil outlet valve seat assembly hole and the oil outlet valve lower seat assembly hole have guiding steps.

[0018] In a preferred embodiment of the present invention, the oil inlet connector, valve body, and pump body cover are all welded to the pump body, and the pump body cover can be rotated before welding for easy installation.

[0019] Due to the adoption of the above technical solution, the present invention has the advantages of reliable control and optimized assembly. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the high-pressure methanol pump of the present invention.

[0021] In the diagram: 1. Pump body, 2. Pressure stabilizing plate seat ring, 3. Pressure relief valve seat, 4. Pressure relief valve ball, 5. Pressure relief valve spring seat, 6. Pump body top cover, 7. Pressure relief valve spring, 8. Oil inlet connector, 9. Pressure stabilizing plate pressure ring, 10. Pressure stabilizing plate, 11. Oil inlet valve seat, 12. Solenoid valve housing, 13. Solenoid valve connector, 14. Solenoid stop block, 15. Spring washer, 16. Magnetic shielding sleeve, 17. Valve stem spring, 18. Iron core, 19. Valve stem, 20. Flange, 21. 21. Armature; 22. Valve body; 23. Valve stem guide plate; 24. O-ring seal; 25. Inlet valve spring seat; 26. Lower plunger spring seat; 27. Plunger spring; 28. Plunger; 29. ​​Upper plunger spring seat; 30. Skeleton oil seal; 31. Plunger retaining ring; 32. Plunger sleeve; 33. Valve plate spring; 34. Inlet valve plate; 35. Outlet valve spring cover; 36. Outlet valve ball; 37. Outlet valve spring; 38. Outlet connector; 39. Lower outlet valve seat. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] A high-pressure methanol pump includes: a pump body cover assembly, a pressure stabilizing assembly, a solenoid valve assembly, a valve stem assembly, an inlet valve assembly, an outlet valve assembly, a pressure relief valve assembly, and a plunger assembly.

[0024] The pump body cover component includes an oil inlet connector 8, a pump body cover 6, and an oil filter (not shown in the figure). The oil inlet connector 6 is welded together with the pump body cover 6.

[0025] The pressure stabilizing component includes a pressure stabilizing disc ring 9, a pressure stabilizing disc seat ring 2, and a pressure stabilizing disc 10. The pressure stabilizing component is located in the cavity of the pump body cover component.

[0026] The solenoid valve components include a coil (not shown in the figure), an iron core 18, a spring, a spring washer 15, a solenoid valve connector 13, a valve body 22, and a valve stem guide plate 23. When the coil is energized, the iron core 18 generates an electromagnetic attraction force.

[0027] The valve stem assembly includes a valve stem 19 and an armature 21. The head of the valve stem 19 has an arc protrusion. The armature 21 is fitted onto the stem of the valve stem 19 and can drive the valve stem 19 to move up and down together. The armature 21 has a flow divider hole that runs through the upper and lower parts.

[0028] The oil inlet valve assembly includes an oil inlet valve seat 11, an oil inlet valve plate 34, a valve plate spring 33, and an oil inlet valve spring seat 25. The oil inlet valve spring (not shown in the figure) is located between the oil inlet valve plate 34 and the oil inlet valve spring seat 25. The oil inlet valve plate 34 is in planar seal with the oil inlet valve seat 11.

[0029] The oil outlet valve assembly includes an oil outlet valve seat (not shown in the figure), an oil outlet valve spring 37, an oil outlet valve ball 36, an oil outlet valve lower seat 39, and an oil outlet connector 38. The oil outlet valve ball 36 is sealed with the conical surface of the oil outlet valve seat (not shown in the figure) and the oil outlet valve lower seat 39.

[0030] The pressure relief valve components include a pressure relief valve seat 3, a pressure relief valve ball 4, a spring seat, a pressure relief valve spring 7, and a conical seal between the pressure relief valve seat 3 and the pressure relief valve ball 4.

[0031] The plunger assembly includes a plunger 28, a plunger sleeve 32, an upper plunger spring seat 29, a plunger retaining ring 31, a skeleton oil seal 30, a plunger spring 27, and a lower plunger spring seat 26. There is a gap between the plunger 28 and the plunger sleeve 32, allowing for free reciprocating motion. The plunger 28 and the lower plunger spring seat 26 are interference-fitted. The plunger retaining ring 31 and the skeleton oil seal 30 are fixed inside the upper plunger spring seat.

[0032] The working principle of this invention is as follows: After methanol enters through the inlet connector, it enters the inner cavity of the pump body cover 6. After being damped by the pressure stabilizing plate 10, it enters the inlet valve area through the fuel flow hole. When not energized, the valve stem spring 17 presses against the armature 21, the armature 21 is sleeved on the valve stem 19, and the valve stem 19 presses against the inlet valve plate 34, at which time the inlet valve is open. When energized, the iron core 18 generates a suction force, which pulls the valve stem 19 and the armature 21 up together. At this time, the inlet valve plate 34, under the action of the valve plate spring 33, is tightly fitted with the inlet valve seat 11, which plays a sealing role. When energized, the plunger 28 moves upward, compressing the plunger cavity volume. When the pressure increases to a certain value, the outlet valve ball 36 overcomes the spring force of the outlet valve spring 37, and the outlet valve opens, allowing methanol to flow into the oil rail from the outlet connector 38. If the pressure in the oil rail is too high, the pressure relief valve ball 4 will open, and the methanol will return to the inlet valve area, reducing the pressure in the oil rail.

Claims

1. A high-pressure methanol pump for direct mounting to an engine, characterized in that, include: A pump body cover assembly, comprising an oil inlet connector, a pump body cover, and an oil filter, wherein the oil inlet connector is welded together with the pump body cover. A pressure stabilizing component, comprising a pressure stabilizing disc pressure ring, a pressure stabilizing disc seat ring, and a pressure stabilizing disc structure, wherein the pressure stabilizing component is located within the cavity of the pump body upper cover component; A solenoid valve component, comprising a coil, an iron core, a spring, a spring washer, a connector, a valve body, and a guide plate, wherein the coil, when energized, causes the iron core to generate an electromagnetic attraction. A valve stem assembly, comprising a valve stem and an armature, wherein the valve stem head is provided with an arc protrusion, and the armature is sleeved on the valve stem and can drive the valve stem to move up and down together, and the armature is provided with a flow divider hole that runs through the upper and lower parts; An oil inlet valve assembly, comprising an oil inlet valve seat, an oil inlet valve plate, a valve plate spring, and an oil inlet valve spring seat, wherein the oil inlet valve spring is located between the oil inlet valve plate and the oil inlet valve spring seat, and the oil inlet valve plate is in planar sealing with the oil inlet valve seat. An oil outlet valve assembly, comprising an oil outlet valve seat, an oil outlet valve spring, an oil outlet valve ball, an oil outlet valve lower seat, and an oil outlet connector, wherein the valve ball is sealed to the conical surfaces of the oil outlet valve seat and the oil outlet valve lower seat; A pressure relief valve assembly, comprising a pressure relief valve seat, a pressure relief valve ball, a spring seat, and a pressure relief valve spring, wherein the pressure relief valve seat and the pressure relief valve ball are sealed by conical surfaces; A plunger assembly includes a plunger, a plunger sleeve, an upper plunger spring seat, a plunger retaining ring, a skeleton oil seal, a plunger spring, and a lower plunger spring seat. There is a gap between the plunger and the plunger sleeve, allowing for free reciprocating motion. The plunger and the lower plunger spring seat are interference-fitted. The plunger retaining ring and the skeleton oil seal are fixed within the upper plunger spring seat.

2. The high-pressure methanol pump according to claim 1, characterized in that, The pump body cover includes a pump body and a flange, which is welded to the pump body.

3. A high-pressure methanol pump according to claim 1, characterized in that, The pump body is provided with an oil outlet valve seat assembly hole and an oil outlet valve lower seat assembly hole, and both the oil outlet valve seat assembly hole and the oil outlet valve lower seat assembly hole have guide steps.

4. A high-pressure methanol pump according to claim 1, characterized in that, The oil inlet connector, valve body, and pump body cover are all welded to the pump body. The pump body cover can be rotated before welding for easy installation.

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