CN112177824B - Liquid-driven electric control methanol ceramic plunger pump - Google Patents
Liquid-driven electric control methanol ceramic plunger pump Download PDFInfo
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- CN112177824B CN112177824B CN202011059094.1A CN202011059094A CN112177824B CN 112177824 B CN112177824 B CN 112177824B CN 202011059094 A CN202011059094 A CN 202011059094A CN 112177824 B CN112177824 B CN 112177824B
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- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 title claims abstract description 306
- 239000000919 ceramic Substances 0.000 title claims abstract description 55
- 239000007788 liquid Substances 0.000 title claims description 24
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000007789 sealing Methods 0.000 claims abstract description 19
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 239000003921 oil Substances 0.000 claims description 57
- 230000009471 action Effects 0.000 claims description 13
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 238000005086 pumping Methods 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 239000000295 fuel oil Substances 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000010687 lubricating oil Substances 0.000 claims description 2
- -1 polytetrafluoroethylene Polymers 0.000 claims description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 2
- 230000003068 static effect Effects 0.000 claims description 2
- 230000008676 import Effects 0.000 claims 1
- 230000009347 mechanical transmission Effects 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000013461 design Methods 0.000 description 4
- 239000000446 fuel Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000002283 diesel fuel Substances 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
- F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
- F02M59/105—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive hydraulic drive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
- F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
- F02M59/46—Valves
- F02M59/466—Electrically operated valves, e.g. using electromagnetic or piezoelectric operating means
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Fuel-Injection Apparatus (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a liquid-drive electric control methanol ceramic plunger pump which mainly comprises a pump assembly, an alcohol inlet pipe valve assembly, a normally closed two-position three-way valve assembly and a large-flow electromagnetic valve assembly. The plunger and barrel assembly of the pump assembly comprises a plunger sleeve and a ceramic combined plunger, wherein the plunger sleeve is provided with an alcohol inlet and an alcohol outlet which are communicated with a plunger cavity, and is provided with a methanol return passage. And the alcohol inlet pipe valve assembly is arranged in the alcohol inlet and is used for controlling the methanol to enter the plunger cavity. The lower end of the pump assembly is arranged on a valve seat of the normally closed two-position three-way valve assembly, and the flow passage is disconnected and communicated with the oil outlet flow passage. According to the invention, by optimizing the plunger and barrel assembly, the good sealing property and self-lubricating property of the methanol are ensured, and the service life of the pump is prolonged. The safety factor of the pump is improved by the isolation of the electromagnetic valve and the methanol flow channel. The phenomenon of rough work caused by mechanical transmission is eliminated through hydraulic transmission, multistage flexible control of methanol supply pressure can be realized, working oil of the hydraulic transmission can be recycled, and the device is energy-saving and environment-friendly.
Description
Technical Field
The invention relates to a methanol supply technology applying methanol on a marine diesel engine, in particular to a methanol supply pump.
Background art:
as global emissions regulations become more stringent, marine engine technology is moving towards zero emissions and overall performance optimization. The methanol has the advantages of being liquid at room temperature, convenient to transport, store and fill, wide in source, renewable and the like, and is a potential diesel oil alternative fuel. The methanol alternative diesel oil has good prospect when being applied to the marine engine in consideration of aspects of emission, complete machine modification cost, operation economy and the like.
The methanol pump is an important device in a methanol supply system, and is generally designed to be improved on the basis of a conventional diesel pump in consideration of the convenience of installation on a ship and the reduction of use cost. Because the methanol has low viscosity, strong corrosivity and lower flash point, the service life is greatly shortened when the conventional electric control pump supplies the methanol, and potential safety hazards exist in use. Therefore, the development of a corrosion-resistant electric control methanol pump with long service life and high safety coefficient of use is a problem to be solved urgently by applying methanol fuel.
The invention content is as follows:
the invention aims to provide a corrosion-resistant, self-lubricating, energy-saving and environment-friendly liquid-drive electronic control methanol ceramic plunger pump with high safety coefficient, mild transmission, and the technical principle is adopted, so that the liquid-drive electronic control pump working by adopting the technical principle has stronger reliability when supplying fuel similar to methanol, and the service life of the liquid-drive electronic control pump is not influenced by the fuel.
The technical scheme of the invention is as follows:
a liquid drive electronically controlled methanol ceramic plunger pump, comprising:
the pump assembly comprises a pump body, a plunger and barrel assembly, a plunger spring and a guide piston, wherein the plunger and barrel assembly, the plunger spring and the guide piston are assembled in the pump body; the plunger matching part comprises a plunger sleeve and a ceramic combined plunger, and the plunger sleeve is provided with an alcohol inlet and an alcohol outlet which are communicated with the plunger cavity; a methanol return passage is arranged on the plunger sleeve and is sealed by an O-shaped sealing ring, and the outside of the methanol return passage is communicated with atmospheric pressure; the ceramic combined plunger comprises a plunger core, a ceramic plunger cylinder, a plunger disc, a plunger screw and a plunger sealing ring; the ceramic plunger cylinder is tightly pressed on the plunger core through a plunger screw by the plunger disc and is sealed by the plunger sealing ring. The ceramic plunger cylinder is made of zirconia super ceramic, and the length of the ceramic plunger cylinder covers the whole working stroke of the plunger.
And the alcohol inlet pipe valve assembly is arranged in the alcohol inlet on the plunger sleeve and used for controlling the methanol to enter the plunger cavity, and the outer end of the alcohol inlet pipe valve assembly is connected with the alcohol inlet pipe.
The lower end of the pump assembly is arranged on a valve seat of the normally closed two-position three-way valve assembly, a valve cavity of the pump assembly is communicated with the lower end face of a guide piston of the pump assembly, and the guide piston is controlled to work by acting oil pressure in the valve cavity of the pump assembly on the guide piston.
The high-flow electromagnetic valve component is arranged on one side of the normally-closed two-position three-way valve component, is connected with a valve core of the normally-closed two-position three-way valve component through an inner valve core, and controls the disconnection and the communication of an oil inlet flow passage and an oil outlet flow passage of the normally-closed two-position three-way valve through the coil power-on and power-off control to control the oil pressure in a valve cavity.
The liquid drive electric control methanol ceramic plunger pump is characterized in that in the alcohol pumping process: methanol with certain backpressure enters a plunger cavity through a top-opening alcohol inlet pipe valve component, when a large-flow electromagnetic valve component is not electrified, a working oil inlet channel is in a disconnected state, a working oil outlet channel is in a flowing state, after the large-flow electromagnetic valve component is electrified, an armature iron drives a normally-closed two-position three-way valve sleeve to move leftwards under the action of electromagnetic force, the working oil inlet channel is communicated, and the working oil outlet channel is disconnected. Working oil with certain pressure is filled in the normally closed two-position three-way valve cavity through the working oil inlet, the guide piston is jacked up to move upwards under the action of oil pressure, after the methanol pressure in the plunger cavity is greater than the methanol backpressure of the alcohol inlet, the valve component of the alcohol inlet pipe is closed to block the methanol from flowing out of the alcohol inlet, the methanol remained in the plunger cavity continues to be pressurized under the continuous upward extrusion of the plunger, and the methanol is pumped out of the alcohol outlet.
The liquid drive electric control methanol ceramic plunger pump is reset: after methanol is pumped out from the methanol outlet, the pressure of the plunger cavity is reduced, after the large-flow electromagnetic valve is powered off, the electromagnetic force disappears, the armature resets under the action of the spring force of the electromagnetic valve, the normally-closed two-position three-way valve sleeve moves rightwards, the working oil inlet channel is disconnected, the working oil outlet channel is conducted, the fuel oil pressure in the normally-closed two-position three-way valve cavity is reduced, the guide piston resets under the action of the plunger spring, and the methanol enters the plunger cavity through the jacking alcohol inlet pipe valve assembly again to prepare for next circulating pump alcohol.
The invention has the following beneficial effects:
the invention adopts the pump component structure of the conventional diesel pump, the upper part of the pump component is designed with the alcohol inlet pipe valve component, the lower part is provided with the normally closed two-position three-way valve component and the large-flow electromagnetic valve component, and the hydraulic driving mode is adopted, thereby eliminating the phenomenon of rough work caused by mechanical transmission and realizing the multi-stage flexible control of methanol supply pressure; the hydraulic transmission working oil can be recycled, and is energy-saving and environment-friendly.
The ceramic combined plunger piston is adopted, only the methanol return passage is arranged on the plunger piston sleeve, and the plunger piston is sealed by the O-shaped sealing ring, so that the lubricating requirement of the plunger piston can be met, the sealing effect on methanol can be ensured, and the recycling of the methanol is ensured.
Meanwhile, the arrangement of a methanol flow channel is optimized and arranged at the upper part of the plunger sleeve, so that the types and the number of methanol flowing through parts are reduced, the good sealing property of the methanol is ensured, and the service life of the pump is prolonged; and the methanol flow channel and the electromagnetic valve are arranged at the upper end and the lower end of the pump body, so that the circuit and the liquid path are isolated, and the use safety factor of the pump can be improved.
Drawings
Fig. 1 is a front view cross section of a liquid drive electric control methanol ceramic plunger pump.
Fig. 2 is a schematic structural diagram of an alcohol inlet pipe valve assembly in a liquid-driven electrically-controlled methanol ceramic plunger pump.
Fig. 3 is a left side sectional view of the liquid drive electrically controlled methanol ceramic plunger pump.
FIG. 4 is a schematic view of a partial structure of a plunger and barrel assembly of a liquid-driven electrically-controlled methanol ceramic plunger pump
Fig. 5 is a structural schematic diagram of a normally closed two-position three-way valve assembly in the liquid-driven electric control methanol ceramic plunger pump.
FIG. 6 is a schematic structural diagram of a large-flow electromagnetic valve component in a liquid-driven electrically-controlled methanol ceramic plunger pump,
fig. 7 is an outline view of the liquid-driven electrically controlled methanol ceramic plunger pump.
In the figure, 1, an alcohol inlet pipe valve component, 2, a pump body, 3, a plunger coupling component, 4, a pump body bolt, 5, an O-shaped sealing ring, 6, a normally closed two-position three-way valve component, 7, a large-flow electromagnetic valve component, 8, a valve cover shell, 9, a bolt, 10, a guide piston, 11, a spring seat, 12, a plunger spring, 13, a spring disc, 14, an O-shaped sealing ring, 15 and a plunger sleeve bolt;
101. an oil inlet pipe joint 102, a cone valve core 103, a cone valve spring 104 and a pressure regulating gasket;
301. plunger sleeve 302, ceramic plunger 3021, plunger core 3022, ceramic plunger barrel 3023, plunger disc 3024, plunger screw 3025, plunger O-ring;
601. a valve seat 602, a valve sleeve 603, a right valve core 604 and a left valve core;
701. an armature, 702, an electromagnetic coil, 703, a static iron core, 704, a solenoid valve spring, 705, an inner valve core, 706 and a gasket.
The specific implementation mode is as follows:
the invention will be further explained with reference to the drawings.
As shown in fig. 1, the liquid-drive electronic control methanol ceramic plunger pump mainly comprises a pump assembly, an alcohol inlet pipe valve assembly 1, a normally closed two-position three-way valve assembly 6, a large-flow electromagnetic valve assembly 7, a valve housing 8 and other components.
The pump assembly adopts a structure of a conventional diesel pump and comprises a pump body 2, a plunger and barrel assembly 3, a plunger spring 4 and a guide piston 10, wherein the plunger and barrel assembly is assembled in the pump body. The plunger and barrel assembly 3 comprises a plunger sleeve 301 and a ceramic combined plunger 302, the plunger sleeve is connected with the pump body 2 through a bolt, the upper end of the ceramic combined plunger 302 is arranged in the plunger sleeve 301, and a plunger cavity is formed between the two. The ceramic combined plunger 302 comprises a plunger core 3021, a ceramic plunger barrel 3022, a plunger disc 3023, a plunger screw 3024, and a plunger seal 3025. The plunger disc compresses the ceramic plunger cylinder on the plunger core through a plunger screw and is sealed by a plunger sealing ring. The right side of plunger bushing upper end is equipped with into mellow wine mouth, and the plunger bushing top is equipped with out mellow wine mouth, and it all communicates the plunger chamber through the oil duct to advance mellow wine mouth and go out mellow wine mouth. The lower end of the plunger is supported by a guide piston 10, a plunger spring 12 is sleeved outside the lower part of the plunger, and the upper end and the lower end of the plunger spring 12 are respectively assembled in a spring seat 11 and a spring disc 13. The ceramic plunger cylinder is made of zirconia super ceramic, and the length of the ceramic plunger cylinder covers the whole working stroke of the plunger.
Referring to fig. 2, in the present invention, an alcohol inlet pipe valve assembly 1 includes an alcohol inlet pipe joint 101, a cone valve core 102, a cone valve spring 103, and a pressure regulating gasket 104. An alcohol inlet pipe joint 101 is connected and installed in an alcohol inlet of the plunger sleeve through threads, a pressure regulating gasket 104, a cone valve spring 103 and a cone valve core 102 are sequentially assembled in the alcohol inlet pipe joint 101, the outer end of the alcohol inlet pipe joint is connected with an alcohol inlet pipe, and when alcohol is pumped, the cone valve core is jacked open through methanol with certain back pressure so that the methanol enters the plunger cavity. Therefore, the arrangement of the methanol flow channel is optimized, the isolation of the electromagnetic valve and the methanol flow channel is realized, and the types and the number of methanol flowing through parts are reduced.
Referring to fig. 3 and 4, due to the low viscosity of methanol, the invention needs to add a plunger matching part lubrication design on the basis of the design of the original diesel pump; the methanol has strong corrosivity, the corrosivity is increased after the water in the air is adsorbed, and the methanol sealing design is added. Specifically, a methanol return passage is arranged at the upper part of the plunger sleeve, and the outside of the methanol return passage is communicated with atmospheric pressure, namely, the implementation of plunger lubrication and methanol sealing is realized by the design of a ceramic combined plunger. The plunger is optimized, methanol self-lubrication can be realized, and the reflowed methanol can be recycled.
In addition, a methanol return channel on the plunger sleeve is sealed through an O-shaped sealing ring, the ceramic plunger cylinder and the plunger core are sealed through the O-shaped sealing ring, polytetrafluoroethylene is adopted, zirconia super ceramic is adopted for the ceramic plunger cylinder, and the materials of other components are kept unchanged on the basis of the original diesel pump.
Referring to fig. 5, in the present invention, the normally closed two-position three-way valve assembly 6 includes a valve seat 601, a valve sleeve 602, a right valve core 603 and a left valve core 604, the valve sleeve 602 is disposed in the valve seat cavity, and the right valve core 603 and the left valve core 604 are disposed on the right side and the left side of the valve sleeve cavity, respectively. The valve sleeve 602 is provided with an oil inlet hole a, an oil outlet hole b and an oil pressure output hole c which are communicated with the valve sleeve cavity, the oil inlet hole a and the oil outlet hole b are respectively communicated with a working oil inlet and a working oil outlet on the valve seat, the right valve core and the left valve core are respectively matched to realize opening and closing, and the valve sleeve cavity is communicated with the bottom surface of the guide piston through the oil pressure output hole c. The valve seat is provided with a threaded hole, and the pump body is connected with the valve seat through a bolt. The guide piston is arranged at the lower side in the cavity of the pump body and is pressed tightly on the seat surface in the cavity of the cylindrical cavity of the valve seat by a plunger spring. The mechanical transmission device is limited by a marine main engine arrangement scheme and transmits rough force. The hydraulic transmission is adopted, flexible arrangement can be realized, and the transmission is mild. In addition, the effect of flexibly adjusting the pressure of the methanol pump is realized by adjusting the oil pressure of the hydraulic transmission working oil. The hydraulic transmission working oil adopts pump lubricating oil, and is energy-saving and environment-friendly, and the two normally closed three-way valves are lubricated and recycled.
Because the methanol flash point is lower, the use safety of the pump needs to be considered in the use process, and if the structural arrangement of the original diesel oil electric control pump is reserved, the original common electromagnetic valve needs to be replaced by an explosion-proof electromagnetic valve. The explosion-proof solenoid valve is expensive, and the improvement cost of the methanol pump can be greatly increased.
Referring to fig. 6, the electromagnetic valve assembly is arranged at the lower end of the pump body, and hydraulic drive of the pump is realized by controlling the normally closed two-position three-way valve assembly 6. In the present invention, the high flow solenoid valve assembly 7 includes an armature 701, a solenoid valve spring 702, an inner spool 703, a spacer 704, a stationary core 705, and an electromagnetic coil 705. The inner valve core 703 is connected with the left valve core 604 through threads, the armature 701 is connected with the valve sleeve 602 through threads, and the displacement of the valve sleeve is controlled by the electromagnetic valve through the on-off of the coil 705 so as to control the disconnection and the connection of an oil inlet flow passage and an oil outlet flow passage of the normally closed two-position three-way valve.
In the present invention, the valve cover 8 is coupled to the valve seat 601 by a bolt to cover the large flow rate solenoid valve assembly 7.
Alcohol pumping process: methanol with a certain back pressure enters the plunger cavity by pushing the cone valve core in the alcohol inlet pipe valve component, as shown in figure 2. When the large-flow electromagnetic valve is not energized, in the normally closed two-position three-way valve, the working oil inlet channel is in a disconnected state, and the working oil outlet channel is in a flowing state, as shown in fig. 4 and 5. After the high-flow electromagnetic valve is electrified, the armature drives the normally closed two-position three-way valve sleeve to move leftwards under the action of electromagnetic force, the working oil inlet channel is communicated, and the working oil outlet channel is disconnected. Working oil with certain pressure is filled in the normally closed two-position three-way valve cavity through the working oil inlet, the guide piston is jacked up to move upwards under the action of oil pressure, and after the methanol pressure in the plunger cavity is greater than the methanol backpressure of the alcohol inlet, the conical valve core is tightly pressed on the alcohol inlet pipe connector to block the methanol from flowing out of the alcohol inlet. The methanol remained in the plunger cavity is continuously pressurized under the continuous upward extrusion of the plunger and is pumped out from the alcohol outlet.
Resetting: after methanol is pumped from the methanol outlet, after injection, the pressure of the plunger cavity is reduced, after the power of a large-flow electromagnetic valve is cut off, the electromagnetic force disappears, the armature resets under the action of the spring force of the electromagnetic valve, the normally-closed two-position three-way valve sleeve moves rightwards, the working oil inlet channel is disconnected, the working oil outlet channel is communicated, the fuel oil pressure in the normally-closed two-position three-way valve cavity is reduced, the guide piston resets under the action of the plunger spring, and the methanol enters the plunger cavity through the cone valve core in the jacking methanol inlet pipe valve component to prepare for next circulating pump.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a automatically controlled methyl alcohol ceramic plunger pump of liquid drive which characterized in that includes:
the pump assembly comprises a pump body, a plunger and barrel assembly, a plunger spring and a guide piston, wherein the plunger and barrel assembly, the plunger spring and the guide piston are assembled in the pump body; the plunger matching part comprises a plunger sleeve and a ceramic combined plunger, and the plunger sleeve is provided with an alcohol inlet and an alcohol outlet which are communicated with the plunger cavity; a methanol return passage is arranged on the plunger sleeve and is sealed by an O-shaped sealing ring, and the outside of the methanol return passage is communicated with atmospheric pressure; the ceramic combined plunger comprises a plunger core, a ceramic plunger cylinder, a plunger disc, a plunger screw and a plunger sealing ring; the plunger disc tightly presses the ceramic plunger cylinder on the plunger core through a plunger screw and is sealed by a plunger sealing ring;
the alcohol inlet pipe valve assembly is arranged in the alcohol inlet and used for controlling the methanol to enter the plunger cavity, and the outer end of the alcohol inlet pipe valve assembly is connected with the alcohol inlet pipe;
the lower end of the pump assembly is arranged on a valve seat of the normally closed two-position three-way valve assembly, a valve sleeve cavity of the pump assembly is communicated with the lower end face of a guide piston of the pump assembly, and the guide piston is controlled to work by the action of oil pressure in the valve sleeve cavity of the pump assembly on the guide piston;
the high-flow electromagnetic valve component is arranged on one side of the normally-closed two-position three-way valve component, is connected with a valve core of the normally-closed two-position three-way valve component through an inner valve core, controls the disconnection and the connection of an oil inlet flow channel and an oil outlet flow channel of the normally-closed two-position three-way valve through the connection and disconnection of an electromagnetic coil, and controls the oil pressure in a valve sleeve cavity;
in the alcohol pumping process: when the large-flow electromagnetic valve component is electrified, the armature drives the normally-closed two-position three-way valve sleeve to move leftwards under the action of electromagnetic force, the working oil inlet channel is communicated, the working oil outlet channel is disconnected, working oil with certain pressure fills the normally-closed two-position three-way valve cavity through the working oil inlet, the guide piston is jacked to move upwards under the action of oil pressure, after the methanol pressure in the plunger cavity is greater than the methanol backpressure of the alcohol inlet, the alcohol inlet pipe valve component is closed, the methanol is blocked from flowing out of the alcohol inlet, the methanol remained in the plunger cavity is continuously pressurized under the continuous upward extrusion of the plunger, and the methanol is pumped out of the alcohol outlet;
in the resetting process: after methanol is pumped out from the methanol outlet, the pressure of the plunger cavity is reduced, after the large-flow electromagnetic valve is powered off, the electromagnetic force disappears, the armature resets under the action of the spring force of the electromagnetic valve, the normally-closed two-position three-way valve sleeve moves rightwards, the working oil inlet channel is disconnected, the working oil outlet channel is conducted, the fuel oil pressure in the normally-closed two-position three-way valve cavity is reduced, the guide piston resets under the action of the plunger spring, and the methanol enters the plunger cavity through the jacking alcohol inlet pipe valve assembly again to prepare for next circulating pump alcohol.
2. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1, characterized in that: the ceramic plunger cylinder is made of zirconia super ceramic, and the length of the ceramic plunger cylinder covers the whole working stroke of the plunger.
3. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1 or 2, characterized in that: only a methanol return passage is provided in the plunger sleeve and is disposed in the upper portion of the plunger sleeve.
4. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1 or 2, characterized in that: the alcohol inlet pipe valve component comprises an alcohol inlet pipe joint, a conical valve core, a conical valve spring and a pressure regulating gasket; the alcohol inlet pipe joint is assembled in the alcohol inlet through threads, and the conical valve core, the conical valve spring and the pressure regulating gasket are sequentially assembled in the alcohol inlet pipe joint from outside to inside; in the alcohol pumping process, methanol with certain back pressure enters the plunger cavity by jacking the conical valve core.
5. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1 or 2, characterized in that: two three-way valve components of normal close formula include disk seat, valve barrel with the case, the disk seat inner chamber is arranged in to the valve barrel, the case divides right side case and left case, arranges right side, the left side in the valve barrel respectively in, has inlet port, oil outlet and the oil pressure delivery outlet of intercommunication valve sleeve chamber on the valve barrel, inlet port, oil outlet respectively with the disk seat on work oil import and export intercommunication, and by right side case and left case cooperate respectively to realize the switching, the oil pressure delivery outlet communicates the valve sleeve chamber with guide piston's bottom surface.
6. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 5, characterized in that: the large-flow electromagnetic valve assembly comprises an armature, an electromagnetic valve spring, an inner valve core, a static iron core and an electromagnetic coil, the inner valve core is connected with the left valve core through threads, the armature is connected with the valve sleeve through the threads, and the electromagnetic valve controls the displacement of the valve sleeve through the on-off of the coil so as to control the disconnection and the connection of an oil inlet flow channel and an oil outlet flow channel of the normally-closed two-position three-way valve.
7. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1 or 2, characterized in that: the guide piston is arranged at the lower side in the cavity of the pump body and is tightly pressed on the seat surface in the cavity of the cylindrical cavity of the valve seat by a plunger spring.
8. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1 or 2, characterized in that: the valve cover is connected to the valve seat through bolts to cover the high-flow electromagnetic valve assembly.
9. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1 or 2, characterized in that: the hydraulic transmission working oil is pump lubricating oil.
10. The liquid-driven electrically controlled methanol ceramic plunger pump according to claim 1 or 2, characterized in that: the plunger sleeve is provided with a methanol backflow channel O-shaped sealing ring and a plunger sealing ring which are made of polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011059094.1A CN112177824B (en) | 2020-09-30 | 2020-09-30 | Liquid-driven electric control methanol ceramic plunger pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011059094.1A CN112177824B (en) | 2020-09-30 | 2020-09-30 | Liquid-driven electric control methanol ceramic plunger pump |
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| Publication Number | Publication Date |
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| CN112177824A CN112177824A (en) | 2021-01-05 |
| CN112177824B true CN112177824B (en) | 2021-11-02 |
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| CN202011059094.1A Active CN112177824B (en) | 2020-09-30 | 2020-09-30 | Liquid-driven electric control methanol ceramic plunger pump |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537352A (en) * | 1981-10-05 | 1985-08-27 | Nippondenso Co., Ltd. | Fuel injection apparatus |
| DE10344897A1 (en) * | 2003-09-26 | 2005-04-21 | Bosch Gmbh Robert | Valve for controlling connection in high-pressure liquid system, especially engine fuel injection system, has valve element with journal protruding into connection via which fuel exits valve pressure chamber so only low forces are generated |
| US20070107696A1 (en) * | 2004-02-25 | 2007-05-17 | Boris Feinleib | Two-stage distribution device of actuating fluid for hydraulically driven pump-injector for internal combustion engines |
| CN202108631U (en) * | 2011-04-07 | 2012-01-11 | 陈海龙 | Rail pressure enhancing pump for high-pressure common rail system of high-power diesel engine |
| JP5925104B2 (en) * | 2012-10-19 | 2016-05-25 | 三菱重工業株式会社 | Fuel gas injection valve, dual fuel gas engine, and fuel gas injection valve injection method |
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