CN114658578B - Valve structure of oil pump - Google Patents
Valve structure of oil pump Download PDFInfo
- Publication number
- CN114658578B CN114658578B CN202210225346.6A CN202210225346A CN114658578B CN 114658578 B CN114658578 B CN 114658578B CN 202210225346 A CN202210225346 A CN 202210225346A CN 114658578 B CN114658578 B CN 114658578B
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- valve plug
- oil
- valve
- valve port
- outlet valve
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- 238000007789 sealing Methods 0.000 claims abstract description 25
- 239000003921 oil Substances 0.000 claims description 193
- 239000000446 fuel Substances 0.000 claims description 48
- 230000006835 compression Effects 0.000 claims description 31
- 238000007906 compression Methods 0.000 claims description 31
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 26
- 239000000295 fuel oil Substances 0.000 claims description 11
- 238000002955 isolation Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 12
- 238000000034 method Methods 0.000 description 10
- 239000010720 hydraulic oil Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 7
- 238000005192 partition Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000006978 adaptation Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
Classifications
-
- 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
- F02M59/462—Delivery 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)
- Magnetically Actuated Valves (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a valve structure of an oil pump, which relates to the technical field of valves and comprises a valve seat, a valve plug and a driving mechanism, wherein a first cavity is arranged in the valve seat, the first cavity is communicated with an oil inlet small hole through an oil inlet, the first cavity is communicated with a plunger hole through an oil outlet valve port, the valve plug is movably arranged in the first cavity, a sealing station for sealing the oil outlet valve port is arranged on the movable stroke of the valve plug, and the driving mechanism is used for driving the valve plug to respectively move to the sealing station and separate from the sealing station. According to the invention, the valve plug is movably arranged in the first cavity, when the driving mechanism drives the valve plug to be separated from the sealing station to open the oil outlet valve port, the driving mechanism does not need to penetrate through the oil outlet valve port, so that the oil outlet valve port can be completely opened, and the diameter of the oil outlet valve port can be set to be small enough under the condition of ensuring that the oil outlet valve port has the oil passing amount reaching the standard, so that the sealing effect of the valve plug when the oil outlet valve port is sealed can be improved.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a valve structure of an oil pump.
Background
The direct injection oil pump in the automobile cylinder generally comprises a pump body, a valve, a plunger and the like, wherein an oil inlet small hole, a plunger hole and a pressure oil duct are arranged in the pump body, the valve is generally controlled by an electromagnetic mechanism, the valve is opened, the plunger sucks fuel oil into the plunger hole from the oil inlet small hole through an oil outlet valve port, the valve is closed, and the plunger presses the fuel oil in the plunger hole into the pressure oil duct to be sprayed.
For example, in chinese patent CN102817756B, entitled "gasoline direct injection fuel injection pump", the fuel injection amount can be precisely controlled by electronic means according to the amount of intake air, and the fuel and air are sufficiently atomized and mixed, so that the mixture gas according to the theoretical air-fuel ratio is uniformly filled in the combustion chamber. For another Chinese patent with the publication number of CN204783403U and the name of 'direct injection high-pressure fuel pump with filter screen', the fuel pump can well prevent solid impurity particles in oil from entering an electromagnetic valve and an engine, thereby ensuring the stable working performance of the electromagnetic valve and the engine.
The valve plug of the oil pump valve in the prior art including the patent is located one side of going out oil valve port towards the plunger hole, and the valve plug passes through the spring activity and sets up, and the elasticity of spring is with the valve plug butt in one side of going out oil valve port towards the plunger hole with shutoff valve port, and electromagnetic mechanism sets up the one side of keeping away from the plunger hole at the valve port that goes out oil, and electromagnetic mechanism pushes away to the valve plug through driving a valve rod and passing behind the valve port that goes out oil, makes the valve plug overcome the elasticity of spring and break away from the valve port that goes out oil, makes the valve port that goes out oil open. The valve plug relies on the elasticity of spring to seal out the valve port of oiling, it is known, the valve port diameter of oiling is big more just higher to the sealed requirement of valve plug, the sealed effect of valve plug is relatively poor, otherwise the valve port diameter of oiling is little, the sealed effect of valve plug is better, however valve rod among the prior art need pass the valve port of oiling and just can push away the valve plug in order to open the valve port of oiling, under the condition that it is up to standard to ensure the oil outlet valve mouth oil mass, because the valve rod has taken the space of the valve port of oiling, make the diameter of the valve port of oiling to be forced to enlarge, thereby it is relatively poor to lead to the sealed effect of valve plug.
Disclosure of Invention
The invention aims to provide a valve structure of an oil pump, which aims to overcome the defects in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme: the valve structure of the oil pump is used for controlling opening and closing between an oil inlet small hole and a plunger hole of the oil pump, and comprises a valve seat, a valve plug and a driving mechanism, wherein a first cavity is arranged in the valve seat, the first cavity is communicated with the oil inlet small hole through an oil inlet, the first cavity is communicated with the plunger hole through an oil outlet valve port, the valve plug is movably arranged in the first cavity, a closed station of the oil outlet valve port is arranged on the movable stroke of the valve plug, and the driving mechanism is used for driving the valve plug to move to the closed station and separate from the closed station.
Furthermore, the valve port of producing oil is the cylinder hole form, the valve plug is the cylinder block form, and the valve plug is coaxial and the diameter of valve plug is greater than the diameter of the valve port of producing oil with the valve port of producing oil, and when the valve plug was in the closed position, a terminal surface butt of valve plug and one side that the valve port of producing oil is located first cavity were in order to seal the valve port of producing oil.
Furthermore, the valve port of producing oil is round platform poroid, and the diameter that one side diameter that the valve port of producing oil lies in first cavity is greater than its diameter that is close to one side of plunger hole, the valve plug is the round platform cubic with the valve port looks adaptation of producing oil, and the valve plug is coaxial with the valve port of producing oil, and when the valve plug was in the closed position, the valve plug inserted the valve port of producing oil in order to seal the valve port of producing oil.
Further, actuating mechanism includes first elastic element and first drive unit, first elastic element restores deformation in order to drive when oil pump compression fuel the valve plug motion extremely seal the station, first drive unit drives when oil pump goes into fuel the valve plug motion breaks away from seal the station.
Further, first drive unit is a first electromagnetic component, a first electromagnetic component includes the valve rod, the valve rod passes through the magnetic isolation circle and slides and set up in the disk seat, the one end and the valve plug fixed connection of valve rod, another end fixedly connected with armature, the disk seat internal fixation is provided with an iron core, iron core week is all around being equipped with the coil, and armature is located between valve plug and the iron core.
Furthermore, the first elastic unit is a first compression spring, one end of the first compression spring is connected with the valve plug, and the other end of the first compression spring is connected to the valve seat.
Furthermore, actuating mechanism includes second elastic element and second drive unit, second elastic element resumes deformation in order to drive when the fuel pump goes into the fuel the valve plug motion breaks away from seal station, second drive unit drives when the fuel pump compression fuel the valve plug motion extremely seal station.
Further, the second drive unit is the second electromagnetic component, first electromagnetic component includes the elasticity telescopic link, the elasticity telescopic link slides through separating the magnetosphere and sets up in the disk seat, the disk seat internal fixation is provided with an iron core, iron core week side is around being equipped with the coil, the one end and the valve plug fixed connection of elasticity telescopic link, other end activity run through fixedly connected with armature behind the iron core, armature is located the one side that the valve plug was kept away from to the iron core.
Furthermore, elastic expansion piece includes first festival pole, second festival pole and third elastic unit, first festival pole and second festival pole sliding connection, head rod and valve plug fixed connection, second festival pole with the activity run through behind the iron core with armature fixed connection, the elasticity of third elastic unit acts on between first festival pole and the second festival pole with the extension of drive elastic expansion pole.
Furthermore, the second elastic unit is a tension spring, one end of the tension spring is highly connected with the valve plug, and the other end of the tension spring is connected to the valve seat.
In the above technical solution, according to the valve structure of the oil pump provided by the invention, the valve plug is movably disposed in the first chamber, and when the driving mechanism drives the valve plug to separate from the sealing station to open the oil outlet valve port, the driving mechanism does not need to pass through the oil outlet valve port, so that the oil outlet valve port can be completely opened.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings required in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.
FIG. 1 is a schematic structural diagram provided in an embodiment of the present invention;
FIG. 2 is a schematic structural diagram provided in another embodiment of the present invention;
FIG. 3 is a schematic structural diagram according to yet another embodiment of the present invention;
FIGS. 4-5 are schematic structural diagrams provided in accordance with yet another embodiment of the present invention;
FIG. 6 is a schematic view of the structure of the oil pump according to the embodiment of the present invention when assembled;
FIGS. 7-9 are schematic views of a structure of a further embodiment of the present invention when assembled to an oil pump;
FIG. 10 is a schematic diagram of a portion of the structure of FIG. 7 according to an embodiment of the present invention;
FIG. 11 is an enlarged view of the structure at A in FIG. 10 according to an embodiment of the present invention;
FIG. 12 is a schematic diagram of a portion of the structure of FIG. 8 according to an embodiment of the present invention;
FIG. 13 is an enlarged view of the structure at B in FIG. 12 according to an embodiment of the present invention;
FIG. 14 is a schematic diagram of a portion of the structure of FIG. 9 according to an embodiment of the present invention;
fig. 15 is an enlarged view of a structure at C in fig. 14 according to an embodiment of the present invention.
Description of reference numerals:
1. a valve seat; 2. an oil inlet; 3. a first chamber; 4. an oil outlet valve port; 5. a valve plug; 6. a drive mechanism; 6.1, a first elastic unit; 6.2, a first driving unit; 6.21, a valve rod; 6.22, a magnetic isolation ring; 6.23, armature; 6.24, iron core; 6.25, a coil; 6.3, a second elastic unit; 6.4, a second driving unit; 6.41, an elastic telescopic rod; 6.411, a first section rod; 6.412, a second section rod; 6.413, a third elastic unit; 6.5, an elastic piece; 6.6, a transmission piece; 6.61, a piston; 6.63, a hydraulic oil gallery; 6.64, a partition plate; 6.65, a second oil chamber; 6.66, a first oil chamber; 6.67, a linkage rod; 6.671, inner rod; 6.672, loop bars; 6.673, a fourth elastic unit; 6.674, sliding part; 6.6741, a first inclined plane; 6.6742, a second inclined plane; 6.675, a fifth elastic unit; 6.676, a gap; 6.677, slide holes; 7. a pump body; 7.1, oil inlet holes; 7.2, plunger holes; 7.3, a pressure oil channel; 8. a plunger assembly; 8.1, plunger sleeves; 8.2, plunger core; 8.3, plunger seat; 8.4, a pole; 8.5, a sixth elastic unit; 8.6, roller body; 9. a one-way valve.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
Referring to fig. 1 to 15, a valve structure of an oil pump according to an embodiment of the present invention is configured to control opening and closing between an oil inlet small hole 7.1 and a plunger hole 7.2 of the oil pump, and includes a valve seat 1, a valve plug 5, and a driving mechanism 6, where the valve seat 1 is mounted on a pump body 7 of the oil pump, a first chamber 3 is disposed inside the valve seat 1, the first chamber 3 is communicated with the oil inlet small hole 7.1 through an oil inlet 2, the first chamber 3 is communicated with the plunger hole 7.2 through an oil outlet valve port 4, the valve plug 5 is movably disposed in the first chamber 3, and has a sealing station for sealing the oil outlet valve port 4 on a moving stroke thereof, in the sealing position, the valve plug 5 seals the oil outlet valve port 4 from one end of the oil outlet valve port 4 facing the first chamber 3, and the driving mechanism 6 is configured to drive the valve plug 5 to move to and separate from the sealing station.
In the above technical solution, according to the valve structure of the oil pump provided by the present invention, the valve plug 5 is movably disposed in the first chamber 3, and when the driving mechanism 6 drives the valve plug 5 to disengage from the sealing station to open the oil outlet valve port 4, the driving mechanism 6 does not need to pass through the oil outlet valve port 4, so that the oil outlet valve port 4 can be completely opened, and under the condition that the oil passing amount of the oil outlet valve port 4 is ensured to reach the standard, the diameter of the oil outlet valve port 4 can be set to be sufficiently small, so as to improve the sealing effect when the valve plug 5 seals the oil outlet valve port 4.
Referring to fig. 1, the oil outlet valve port 4 is in a cylindrical hole shape, the valve plug 5 is in a cylindrical block shape, the valve plug 5 is coaxial with the oil outlet valve port 4, the diameter of the valve plug 5 is greater than that of the oil outlet valve port 4, when the valve plug 5 is in the closed position, one end surface of the valve plug 5 abuts against one side of the oil outlet valve port 4 in the first chamber 3 to close the oil outlet valve port 4, and a sealing ring is arranged between the valve plug 5 and the oil outlet valve port 4.
As a preferred technical solution of this embodiment, referring to fig. 2, the oil outlet valve port 4 is circular truncated cone hole-shaped, a diameter of one side of the oil outlet valve port 4 located in the first chamber 3 is larger than a diameter of one side of the oil outlet valve port close to the plunger hole 7.2, the valve plug 5 is circular truncated cone block-shaped and adapted to the oil outlet valve port 4, the valve plug 5 is coaxial with the oil outlet valve port 4, when the valve plug 5 is located at the closed position, the valve plug 5 is inserted into the oil outlet valve port 4 to close the oil outlet valve port 4, and the periphery of the valve plug 5 is wrapped with a sealing gasket.
Referring to fig. 3, the oil outlet valve port 4 is a cylindrical hole or an arc hole adapted to the valve plug 5, the diameter of the valve plug 5 is larger than that of the oil outlet valve port 4, and when the valve plug 5 is in the closed position, the valve plug 5 abuts against the inside of the oil outlet valve port 4 to close the oil outlet valve port 4.
In another embodiment of the present invention, referring to fig. 1 to 3, the driving mechanism 6 includes a first elastic unit 6.1 and a first driving unit 6.2, the first elastic unit 6.1 recovers its shape when the oil pump compresses the fuel to drive the valve plug 5 to move to the closed position, and the first driving unit 6.2 drives the valve plug 5 to move away from the closed position when the oil pump pumps the fuel. Specifically, the first elastic unit 6.1 is a first compression spring, the first compression spring is located in the first chamber 3, one end of the first compression spring is connected with the valve plug 5, and the other end of the first compression spring is connected to the valve seat 1. Specifically, first drive unit 6.2 is first electromagnetic component, and first electromagnetic component includes valve rod 6.21, and valve rod 6.21 slides through magnetism isolating ring 6.22 and sets up in disk seat 1, and the one end and the valve plug 5 fixed connection of valve rod 6.21, other end fixedly connected with armature 6.23, and disk seat 1 internal fixation is provided with an iron core 6.24, and iron core 6.24 week is all around being equipped with coil 6.25, and armature 6.23 is located between valve plug 5 and iron core 6.24.
In this embodiment, when the oil pump compresses the fuel in the plunger hole 7.2, the first electromagnetic assembly is closed, the elastic force of the first compression spring causes the valve plug 5 to be located at the closed position, the oil outlet valve port 4 is closed, when the fuel pressure in the plunger hole 7.2 is higher than the limited pressure, the first compression spring is further compressed, so that the valve plug 5 is separated from the oil outlet valve port 4, the oil outlet valve port 4 is opened, the fuel in the plunger hole 7.2 enters the first chamber 3 through the oil outlet valve port 4, pressure relief is realized in the plunger hole 7.2, when the fuel pressure in the plunger hole 7.2 is reduced to be equal to the limited pressure, the fuel pressure in the plunger hole 7.2 is insufficient to overcome the elastic force of the first compression spring to cause the valve plug 5 to be separated from the oil outlet valve port 4, and the elastic force of the first compression spring causes the valve plug 5 to re-close the oil outlet valve port 4 again, that is, that the valve plug 5 returns to the closed position, so as to prevent the fuel in the plunger hole 7.2 from continuously entering the first chamber 3, and achieve the effect of keeping the pressure in the plunger hole 7.2 at the limited pressure. Compared with the valve structure of the traditional oil pump, the pressure relief assembly is not required to be additionally arranged, the valve structure can control opening and closing between the small oil inlet hole 7.1 and the plunger hole 7.2 of the oil pump, and can relieve pressure of the plunger hole 7.2 when the pressure in the fuel plunger hole 7.2 in the plunger hole 7.2 compressed by the oil pump exceeds the limited pressure. When the oil pump sucks fuel oil into the plunger hole 7.2, the first electromagnetic assembly is opened, the energizing coil 6.25 of the first electromagnetic assembly magnetizes the iron core 6.24 of the first electromagnetic assembly, the iron core 6.24 of the first electromagnetic assembly attracts the armature 6.23 of the first electromagnetic assembly to move, the armature 6.23 of the first electromagnetic assembly pulls the valve plug 5 through the valve rod 6.21 of the first electromagnetic assembly to overcome the elasticity of the first compression spring to move, the valve plug 5 is separated from the closing station, the oil outlet valve port 4 is opened, the fuel oil enters the plunger hole 7.2 from the oil inlet 2 through the first chamber 3, and the valve rod 6.21 does not need to penetrate through the oil outlet valve port 4, so that the oil outlet valve port 4 can be completely opened, under the condition that the oil outlet valve port 4 reaches the standard, the diameter of the oil outlet valve port 4 can be set to be small enough, and the sealing effect when the oil outlet valve port 4 is closed by the valve plug 5 can be improved.
In another embodiment of the present invention, referring to fig. 4-5, the driving mechanism 6 includes a second elastic unit 6.3 and a second driving unit 6.4, the second elastic unit 6.3 recovers its shape when the oil pump pumps fuel to drive the valve plug 5 to move away from the sealing position, and the second driving unit 6.4 drives the valve plug 5 to move to the sealing position when the oil pump compresses the fuel. Specifically, the second elastic unit 6.3 is a tension spring, the tension spring is located in the first chamber 3, one end of the tension spring is highly connected with the valve plug 5, and the other end of the tension spring is connected to the valve seat 1. Specifically, the second driving unit 6.4 is a second electromagnetic assembly, the first electromagnetic assembly includes an elastic telescopic rod 6.41, the elastic telescopic rod 6.41 is slidably disposed in the valve seat 1 through a magnetic isolation ring 6.22, an iron core 6.24 is fixedly disposed in the valve seat 1, a coil 6.25 is wound around the iron core 6.24, one end of the elastic telescopic rod 6.41 is fixedly connected to the valve plug 5, the other end of the elastic telescopic rod movably penetrates through the iron core 6.24 and is fixedly connected to an armature 6.23, the armature 6.23 is located on a side of the iron core 6.24 away from the valve plug 5, preferably, the elastic telescopic member includes a first rod 6.411, a second rod 6.412 and a third elastic unit 6.413, the first rod 6.411 is slidably connected to the second rod 6.412, the first rod is fixedly connected to the second rod 5, the second rod 6.412 is fixedly connected to the armature 6.23 after movably penetrating through the iron core 6.24, elasticity of the third elastic unit 6.413 acts between the first rod 6.411 and the second rod 6.412 to drive the elastic unit 6.41 to elastically compress the spring 413, and preferably, the third elastic unit compresses the second rod 6.413.
In this embodiment, when the oil pump sucks fuel into the plunger hole 7.2, the second electromagnetic component is closed, the valve plug 5 is pulled by the elastic force of the tension spring to separate from the sealing station, the oil outlet valve port 4 is opened, the fuel enters the plunger hole 7.2 from the oil inlet 2 through the first chamber 3, and the second electromagnetic component and the tension spring do not need to pass through the oil outlet valve port 4, so that the oil outlet valve port 4 can be completely opened, under the condition that the oil passing amount of the oil outlet valve port 4 reaches the standard, the diameter of the oil outlet valve port 4 can be set small enough, and the sealing effect when the oil outlet valve port 4 is sealed by the valve plug 5 can be improved. When the oil pump compresses fuel in the plunger hole 7.2, the second electromagnetic assembly is opened, the energizing coil 6.25 of the second electromagnetic assembly magnetizes the iron core 6.24 of the second electromagnetic assembly, the iron core 6.24 of the second electromagnetic assembly attracts the armature 6.23 of the second electromagnetic assembly to move, the armature 6.23 of the second electromagnetic assembly drives the valve plug 5 to move by overcoming the elasticity of the tension spring through the elastic expansion link 6.41 of the second electromagnetic assembly, so that the valve plug 5 reaches a closed station, relative sliding is generated between the first section rod 6.411 and the second section rod 6.412, the third elastic unit 6.413 is further deformed, namely the second compression spring is further compressed; after the valve plug 5 is located at the closing station, the oil pump starts to compress the fuel in the plunger hole 7.2, when the pressure of the fuel in the plunger hole 7.2 is higher than the limited pressure, the second compression spring is further compressed, so that the valve plug 5 is separated from the oil outlet valve port 4, namely, the valve plug 5 is separated from the closing station, the oil outlet valve port 4 is opened, the fuel in the plunger hole 7.2 enters the first chamber 3 through the oil outlet valve port 4 to realize pressure relief of the plunger hole 7.2, when the pressure of the fuel in the plunger hole 7.2 is reduced to be equal to the limited pressure, the pressure of the fuel in the plunger hole 7.2 is insufficient to overcome the elasticity of the tension spring to separate the valve plug 5 from the oil outlet valve port 4, the elasticity of the second compression spring enables the valve plug 5 to close the oil outlet valve port 4 again, namely, the valve plug 5 returns to the closing station, so that the fuel in the plunger hole 7.2 is prevented from continuously entering the first chamber 3, and the effect of keeping the pressure in the plunger hole 7.2 at the limited pressure is achieved. Compared with the valve structure of the traditional oil pump, the oil pump pressure relief valve does not need to be additionally provided with a pressure relief assembly, the valve structure can control opening and closing between the oil inlet small hole 7.1 of the oil pump and the plunger hole 7.2, and can relieve pressure in the plunger hole 7.2 when the pressure in the fuel plunger hole 7.2 in the plunger hole 7.2 compressed by the oil pump exceeds the limited pressure.
In still another embodiment provided by the present invention, referring to fig. 7-15, the oil pump includes a pump body 7, a valve structure and a plunger assembly 8, the oil inlet small hole 7.1 and the plunger hole 7.2 are disposed on the pump body 7, the pump body 7 is further provided with a pressure oil duct 7.3, the plunger hole 7.2 is communicated with the pressure oil duct 7.3 through a first channel, one side of the first channel close to the pressure oil duct 7.3 is provided with a check valve 9, a driving mechanism 6 of the valve structure includes an elastic member and a transmission member 6.6, the elastic member 6.5 is located in the first chamber 3, the process of the elastic member recovering deformation drives the valve plug 5 to move to a closed position, that is, the valve plug 5 abuts against one side of the oil outlet valve port 4 facing the first chamber 3, and the elastic member 6.5 is preferably a second compression spring; the plunger assembly 8 comprises a plunger sleeve 8.1 and a plunger core 8.2, the plunger sleeve 8.1 is communicated with a plunger hole 7.2, the plunger core 8.2 is arranged in the plunger sleeve 8.1 in a reciprocating sliding mode, in the process that the plunger core 8.2 slides to be close to the plunger hole 7.2, the valve plug 5 is located at a closed station through the elastic force of the elastic member, the plunger core 8.2 presses fuel oil in the plunger sleeve 8.1 and the plunger hole 7.2 into the pressure oil duct 7.3, in the process that the plunger core 8.2 slides to be far away from the plunger hole 7.2, the plunger core 8.2 drives the valve plug 5 to be separated from the closed station through the transmission member 6.6, and the plunger core 8.2 sucks the fuel oil in the first chamber 3 into the plunger hole 7.2 and the plunger sleeve 8.1.
The transmission part 6.6 comprises a piston 6.61, a linkage rod 6.67 and a hydraulic oil duct 6.63, a second chamber is arranged in the valve seat 1, the second chamber is separated from the first chamber 3 through a partition plate 6.64, the linkage rod 6.67 slidably penetrates through the partition plate 6.64 between the first chamber 3 and the second chamber in a dynamic seal mode, one end of the linkage rod 6.67 is fixedly connected with the valve plug 5, the other end of the linkage rod is fixedly connected with the piston 6.61, the piston 6.61 is slidably arranged in the second chamber, a first oil chamber 6.66 is defined between one side, close to the valve plug 5, of the piston 6.61 and the second chamber, a second oil chamber 6.65 is defined between one side, far away from the plunger hole 7.2, of the plunger core 8.2 and the plunger sleeve 8.1, the hydraulic oil duct 6.63 is communicated with the first oil chamber 6.66 and the second oil chamber 6.65, in the process that the plunger core 8.2 slides away from the plunger hole 7.2, the plunger core 8.2 presses hydraulic oil in the first oil chamber 6.66 through the hydraulic oil duct 6.63, and drives the piston rod to separate from the piston chamber 6.67 in a sliding direction of the piston sleeve 3.5, and the piston sleeve is closed. Preferably, the linkage rod 6.67 includes an inner rod 6.671, a sleeve rod 6.672, a fourth elastic unit 6.673, a sliding portion 6.674 and a fifth elastic unit 6.675, the inner rod 6.671 is fixedly connected with the valve plug 5, the sleeve rod 6.672 is slidably sleeved on the inner rod 6.671, the sleeve rod 6.672 is movably, hermetically and slidably penetrated through the partition plate 6.64, one end of the sleeve rod 6.672 located in the second chamber is fixedly connected with the piston 6.61, the process of the fourth elastic unit 6.673 restoring the deformation drives the inner rod 6.671 to slide relative to the sleeve rod 6.672 so as to extend the linkage rod 6.67, the fourth elastic unit 6.673 is preferably a third compression spring, the sleeve rod 6.672 is provided with a notch 6.676, the sliding portion 6.674 is slidably disposed in a sliding hole 6.677 formed in the inner rod 6.671, the sliding portion 6.674 has a sliding stroke of a sliding notch 6.676 connected with a side wall, and the sliding portion 6.676 is preferably aligned with the sliding unit 677 when the sliding portion 6.674 is slidably aligned with the fifth elastic unit 6.675. Further preferably, a first inclined surface 6.6741 and a second inclined surface 6.6742 are provided at an end of the sliding portion 6.674 away from the sliding hole 6.677, when the loop bar 6.672 drives the sliding portion 6.674 to move, the partition plate 6.64 enables the sliding portion 6.674 to slide towards the sliding hole 6.677 through the first inclined surface 6.6741, and when the second inclined surface 6.6742 contacts with the inner side edge of the notch 6.676, the inner rod 6.671 is driven by the elastic force of the fourth elastic unit 6.673 to slide towards the outer side of the loop bar 6.672, and the sliding portion 6.674 slides to the receiving station.
In the present embodiment, when the valve plug 5 is located at the closing position by the elastic force of the second compression spring, the sliding portion 6.674 is located at the locking position, and the elastic force of the fourth elastic unit 6.673 cannot be released, as shown in fig. 7, 10-11; in the process that the plunger core 8.2 slides away from the plunger hole 7.2, the plunger core 8.2 presses hydraulic oil in the second oil cavity 6.65 into the first oil cavity 6.66 through the hydraulic oil duct 6.63 so as to drive the piston 6.61 to slide towards the direction away from the oil outlet valve port 4, the piston 6.61 drives the linkage rod 6.67 and the valve plug 5 to synchronously move away from the oil outlet valve port 4, the valve plug 5 is separated from a sealing station, so that the oil outlet valve port 4 is opened, meanwhile, in the process that the plunger core 8.2 slides away from the plunger hole 7.2, fuel oil in the first chamber 3 is sucked into the plunger hole 7.2, the plunger core 8.2 realizes that fuel oil is sucked into the plunger hole 7.2 pump (sucked), and the oil outlet valve port 4 is synchronously opened, and a transmission piece 6.6 and a second pressure spring do not need to penetrate through the oil outlet valve port 4, so that the oil outlet valve port 4 is completely opened, under the condition that the diameter of the oil outlet valve plug 4 can be set small enough, so that when the plunger core 674 can be positioned close to the valve plug 6.6.5 and the valve plug 5 and the valve port 6.6 is driven to gradually move close to the oil outlet valve port 6 when the oil outlet valve port 6.6 is closed, and the piston 5 slides away from the piston 4, the valve port is sealed in the piston hole 6.6.2; then, the first inclined surface 6.6741 of the sliding portion 6.674 abuts against the partition plate 6.64, the partition plate 6.64 enables the sliding portion 6.674 to slide towards the sliding hole 6.677 through the first inclined surface 6.6741, when the second inclined surface 6.6742 contacts with the inner side edge of the notch 6.676, the sliding portion 6.674 is separated from the locking station, at this time, the elastic force of the fourth elastic unit 6.673 drives the inner rod 6.671 to slide towards the outer side of the sleeve rod 6.672, meanwhile, the second inclined surface 6.6742 of the sliding portion 6.674 slides relative to the inner side edge of the notch 6.676, and the sliding portion 6.674 slides to the receiving station against the elastic force of the fifth elastic unit 6.675, as shown in fig. 8 and 12-13 (at this time, the valve plug 5 is far away from the oil outlet 4); therefore, the elastic force of the fourth elastic unit 6.673 is released, the elastic force of the fourth elastic unit 6.673 enables the inner rod 6.671 to slide to the limit position relative to the loop bar 6.672, namely the length of the linkage rod 6.67 is longest, a limit structure is arranged between the inner rod 6.671 and the loop bar 6.672 at the limit position, the limit structure can limit the inner rod 6.671 to slide out of the loop bar 6.672, at the moment, the valve plug 5 is closer to the oil outlet valve port 4, and the plunger hole 7.2 and the plunger sleeve 8.1 are filled with fuel oil, as shown in fig. 9 and 14-15; next, the plunger core 8.2 only needs to slide a small distance in the direction close to the plunger hole 7.2, the plunger core 8.2 sucks the hydraulic oil in the first oil chamber 6.66 into the second oil chamber 6.65, so as to drive the piston 6.61, the linkage rod 6.67 and the valve plug 5 to move towards the oil outlet valve port 4, the elastic force of the second compression spring also starts to be released until the valve plug 5 reaches the closing position, the plunger core 8.2 continues to slide close to the plunger hole 7.2 and starts to compress the fuel in the plunger hole 7.2, then the piston hole 7.2 is pressed into the pressure oil duct 7.3, meanwhile, the piston 6.61 and the sleeve rod 6.672 continue to slide towards the oil outlet valve port 4, the valve plug 5 and the inner rod 6.671 do not move, the sleeve rod 6.672 and the inner rod 6.671 slide relatively to the sliding portion 6.674, the fourth elastic unit 6.673 further deforms until the sliding portion 6.674 aligns to the gap 6.676, and the elastic force of the fifth elastic unit 6.675 makes the sliding portion move to lock the sliding portion 6.674, at this time, the plunger core 8.2 slides to the direction close to the plunger hole 7.2 to the limit position, in this process, if the fuel pressure in the pressure oil duct 7.3 is higher than the limit pressure, the second compression spring and the fourth elastic unit 6.673 are further deformed, so that the valve plug 5 is separated from the oil outlet valve port 4, that is, the valve plug 5 is separated from the sealing station, the oil outlet valve port 4 is opened, the fuel in the plunger hole 7.2 enters the first chamber 3 through the oil outlet valve port 4, so as to realize pressure relief for the pressure oil duct 7.3, when the fuel pressure in the pressure oil duct 7.3 is reduced to be equal to the limit pressure, the fuel pressure in the pressure oil duct 7.3 is not enough to overcome the elastic force of the second compression spring and the valve port of the fourth elastic unit 6.673 to separate the valve plug 5 from the oil outlet 4, and the elastic force of the second compression spring and the fourth elastic unit 6.673 makes the valve plug 5 return to the sealing station again, so as to prevent the fuel in the pressure oil duct 7.3 from continuing to enter the first chamber 3, and thus to maintain the pressure in the pressure oil channel 7.3 at a defined pressure.
As a preferred technical scheme of this embodiment, the check valve 9 includes a first pressure spring, one end of the first pressure spring is connected to the inner wall of the pressure oil duct 7.3, and the other end of the first pressure spring is connected to a valve plate, the valve plate is abutted to an opening of the first passage in the pressure oil duct 7.3 by an elastic force of the first pressure spring, so as to close the first passage, in a process that the plunger core 8.2 slides to be close to the plunger hole 7.2, fuel in the plunger hole 7.2 is compressed and pressure is increased, when the pressure of the fuel in the plunger hole 7.2 is greater than the elastic force of the first pressure spring, the first pressure spring is compressed, so that the valve plate is separated from the opening of the first passage, the first passage is opened, the fuel in the plunger hole 7.2 enters the pressure oil duct 7.3 through the first passage, when the plunger core 8.2 slides to be away from the plunger hole 7.2, the pressure in the plunger hole 7.2 is decreased, the valve plate is abutted to the opening of the first passage again by the elastic force of the first pressure spring, and the first passage is closed again.
As a preferred technical solution in this embodiment, the plunger assembly 8 further includes a plunger seat 8.3, a plunger rod 8.4 and a sixth elastic unit 8.5, the plunger seat 8.3 is fixedly connected to the pump body 7, the plunger rod 8.4 is slidably connected to the plunger seat 8.3, one end of the plunger rod 8.4 is fixedly connected to the plunger core 8.2, the plunger core 8.2 is driven by the plunger rod 8.4 to slide away from the plunger hole 7.2 in the process of the sixth elastic unit 8.5 recovering deformation, the sixth elastic unit 8.5 is preferably a fifth compression spring, the fifth compression spring is sleeved on the plunger rod 8.4, one end of the fifth compression spring is connected to the plunger seat 8.3, the other end of the plunger rod 8.4 is connected to the end of the plunger core 8.2 away from the plunger core 8.2, the end of the plunger rod far away from the plunger core 8.2 is rotatably connected to the roller body 8.6, the driving source for the plunger core 8.2 to linearly reciprocate is a rotating cam, and the convex part of the cam is pressed against the roller body 8.6, so that the roller body 8.6, the plunger rod 8.4, the plunger rod 8.4.4 and the plunger rod 8.4 and the plunger rod 8.2 and the roller body move towards the direction of the plunger core 8.2, and the plunger rod is away from the plunger core 2, so that the plunger rod linearly and the plunger rod moves towards the direction of the plunger core 8.2, when the plunger rod is away from the plunger core 8.2, and the plunger rod.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the present invention. Accordingly, the drawings and description are illustrative in nature and are not to be construed as limiting the scope of the invention.
Claims (4)
1. The utility model provides a valve structure of oil pump, its opening and close that is used for controlling between oil feed aperture and the plunger hole of oil pump, its characterized in that includes:
the valve seat is internally provided with a first cavity, the first cavity is communicated with the oil inlet small hole through an oil inlet, and the first cavity is communicated with the plunger hole through an oil outlet valve port;
the valve plug is movably arranged in the first cavity, and a sealing station for sealing the oil outlet valve port is arranged on the movable stroke of the valve plug;
the driving mechanism is used for driving the valve plug to move to the closing station and separate from the closing station respectively;
the driving mechanism comprises a second elastic unit and a second driving unit, the second elastic unit restores deformation to drive the valve plug to move and separate from the closed station when the oil pump pumps fuel oil, and the second driving unit drives the valve plug to move to the closed station when the oil pump compresses the fuel oil;
the second driving unit is a second electromagnetic assembly which comprises an elastic telescopic rod, the elastic telescopic rod is arranged in the valve seat in a sliding mode through a magnetic isolation ring, an iron core is fixedly arranged in the valve seat, a coil is wound around the iron core, one end of the elastic telescopic rod is fixedly connected with the valve plug, the other end of the elastic telescopic rod movably penetrates through the iron core and then is fixedly connected with an armature, and the armature is located on one side, away from the valve plug, of the iron core;
the elastic telescopic rod comprises a first section rod, a second section rod and a third elastic unit, the first section rod is connected with the second section rod in a sliding mode, a first connecting rod is fixedly connected with a valve plug, the second section rod penetrates through the iron core movably and is fixedly connected with the armature, and the elasticity of the third elastic unit acts between the first section rod and the second section rod to drive the elastic telescopic rod to extend;
the second elastic unit is a tension spring, and the third elastic unit is a second compression spring;
after the valve plug is located the closed station, the oil pump begins to compress the fuel in the plunger hole, when fuel pressure in the plunger hole is higher than the confined pressure, can make second compression spring compressed again, thereby the valve plug breaks away from the delivery valve port, the valve plug breaks away from the closed station, the delivery valve port is opened, the fuel in the plunger hole enters into first cavity through the delivery valve port, realize for plunger hole pressure release, when fuel pressure in the plunger hole drops to being equal to the confined pressure, fuel pressure in the plunger hole is not enough to overcome the elasticity of second compression spring and makes the valve plug break away from the delivery valve port, the elasticity of second compression spring makes the valve plug reclose the delivery valve port, the valve plug gets back to the closed station, thereby prevent the fuel in the plunger hole to continue to enter into first cavity, keep the pressure in the plunger hole at the confined pressure.
2. The valve structure of an oil pump as claimed in claim 1, wherein the outlet valve port is in the shape of a cylindrical hole, the valve plug is in the shape of a cylindrical block, the valve plug is coaxial with the outlet valve port, the diameter of the valve plug is larger than that of the outlet valve port, and when the valve plug is in the closed position, one end surface of the valve plug abuts against one side of the outlet valve port in the first chamber to close the outlet valve port.
3. The valve structure of an oil pump as claimed in claim 1, wherein the oil outlet valve port is in the form of a circular truncated cone hole, the diameter of the side of the oil outlet valve port located in the first chamber is larger than the diameter of the side of the oil outlet valve port located close to the plunger hole, the valve plug is in the form of a circular truncated cone block fitted to the oil outlet valve port, the valve plug is coaxial with the oil outlet valve port, and when the valve plug is in the closed position, the valve plug is inserted into the oil outlet valve port to close the oil outlet valve port.
4. The valve structure of an oil pump according to claim 1, wherein one end of the tension spring is connected to the valve plug, and the other end thereof is connected to the valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210225346.6A CN114658578B (en) | 2022-03-09 | 2022-03-09 | Valve structure of oil pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210225346.6A CN114658578B (en) | 2022-03-09 | 2022-03-09 | Valve structure of oil pump |
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| Publication Number | Publication Date |
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| CN114658578A CN114658578A (en) | 2022-06-24 |
| CN114658578B true CN114658578B (en) | 2022-11-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN203404470U (en) * | 2013-07-25 | 2014-01-22 | 宁波方太厨具有限公司 | Electromagnetic valve with buffer structure |
| CN104847554A (en) * | 2015-04-09 | 2015-08-19 | 中国第一汽车股份有限公司无锡油泵油嘴研究所 | Electric control unit pump for diesel machine |
| JP6709282B2 (en) * | 2016-06-08 | 2020-06-10 | 日立オートモティブシステムズ株式会社 | High pressure fuel supply pump and assembling method thereof |
| CN114576058B (en) * | 2022-03-01 | 2022-09-30 | 安徽腾达汽车科技有限公司 | Oil pump for automobile |
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Denomination of invention: Valve structure of an oil pump Effective date of registration: 20230705 Granted publication date: 20221101 Pledgee: Chuzhou Wandong Rural Commercial Bank Co.,Ltd. Dawang sub branch Pledgor: Anhui Tengda Automobile Technology Co.,Ltd. Registration number: Y2023980047483 |