CN105822476A - High-pressure oil pump with oil inlet valve and diesel engine - Google Patents
High-pressure oil pump with oil inlet valve and diesel engine Download PDFInfo
- Publication number
- CN105822476A CN105822476A CN201610353488.5A CN201610353488A CN105822476A CN 105822476 A CN105822476 A CN 105822476A CN 201610353488 A CN201610353488 A CN 201610353488A CN 105822476 A CN105822476 A CN 105822476A
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- Prior art keywords
- plunger
- valve
- inlet valve
- oil pump
- pressure oil
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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
-
- 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
- F02M59/20—Varying fuel delivery in quantity or timing
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention provides a high-pressure oil pump with an oil inlet valve and a diesel engine, and belongs to the field of oil pumps and diesel engines. The high-pressure oil pump comprises a pump body, and the pump body comprises a plunger and a plunger sleeve; the interior of the plunger sleeve is of a hollow structure, and a plunger cavity is formed inside the plunger sleeve; the plunger is arranged in the plunger cavity; the oil inlet valve is mounted on the pump body, and is arranged at the end of the plunger cavity; and the oil inlet valve is used for controlling the oil inlet amount of the plunger cavity. According to design, machining of a straight groove and a chute in the plunger is removed, the machining difficulty is greatly reduced, the plunger precision is improved, forming of an oil inlet hole in the plunger sleeve is also removed, the machining difficulty and the machining cost are reduced, the strength of the plunger sleeve is improved, matching of the plunger and the plunger sleeve is more perfect, running is more smooth, and the service life is longer.
Description
Technical field
The present invention relates to oil pump and diesel engine arts, in particular to high-pressure oil pump and the diesel engine of a kind of band inlet valve.
Background technology
Single cylinder diesel, two-cylinder diesel are widely used in non-rice habitats mechanically.Current present situation is that traditional mechanical formula high-pressure oil pump generally equipped by diesel engine, and conventional high-tension oil pump uses oil transfer pump conveying low-voltage fuel, in entrance plunger cavity, plunger angle is changed by fuel control mechanism, plunger angular transformation causes the height change of the skewed slot above plunger, thus realizes oil mass change (such as accompanying drawing 1) of fuel feeding.
So, tradition plunger all uses flume structure, and production process needs strictly to control angle of bevel.Owing to skewed slot uses grinding, inevitably producing burr, and need sharp edge control at this, cause complex manufacturing, plunger disabling rate is high.The fault such as plunger clamping stagnation, plunger getting up early abrasion easily occurs.And plunger skewed slot controls oil mass also inaccuracy, causing spraying oil mass and forbidden, scattered error is bigger.Make single cylinder diesel, two-cylinder diesel operating noise big, run unstable.
As a publication is described in the paper of " mechanical investigations and application " periodical volume 20 the 6th phase above chapter entitled " design of plunger skewed slot grinding jig ": " major function of plunger is and plunger bushing forms accurate male part, plays and join oil effect in oil pump.The size of oil pump fuel delivery per cycle is by being in skewed slot size and the position control of plunger head, and therefore the grinding of skewed slot is one critical process.”
For another example, number of patent application is that the Chinese patent application of CN200920179290.5 discloses a kind of Novel plunger type oil pump, including oil pump housing body, assembly for plunger, plunger rod running gear, wherein assembly for plunger is made up of plunger rod and plunger rod shell, the inwall of plunger rod shell offers skewed slot, and skewed slot is arranged on the half range periphery at inwall fuel feed hole；Offering spill port on plunger rod, spill port leads to the bar heart and along bar mandrel to the front end leading to plunger rod.The partial wear that this plunger oil pump reduces between plunger rod and plunger rod outer casing inner wall by dovetail trench moves to the inwall of plunger rod shell sentence, reduces the impact on oil pump sealing, improves the task performance of oil pump.
It can be seen that existing plunger oil pump is all to be controlled the fuel delivery of oil pump by the skewed slot offered on plunger, it has the problems such as control accuracy is low, difficulty of processing is high, sealing effectiveness is poor.
Summary of the invention
The invention provides high-pressure oil pump and the diesel engine of a kind of band inlet valve, it is intended to solve high-pressure oil pump and the problems referred to above of diesel engine existence of band inlet valve in prior art.
The present invention is achieved in that
The high-pressure oil pump of a kind of band inlet valve, including the pump housing, this pump housing includes that plunger and plunger bushing, described plunger bushing inside for hollow structure and form plunger cavity, and described plunger is located in this plunger cavity；The described pump housing is provided with inlet valve, and the end of described plunger cavity is located at by this inlet valve, and this inlet valve is for controlling the oil inlet quantity of described plunger cavity.
Further, described inlet valve is cone valve, ball valve or flat valve.
Further, described plunger offering gas pressure relief slot, this gas pressure relief slot is annular, and described gas pressure relief slot has one or spaced at least two.
Further, the described pump housing being additionally provided with delivery valve, the end of described plunger cavity is also located at by described delivery valve.
Further, described delivery valve is cone valve, ball valve or flat valve.
Further, the described pump housing being additionally provided with electromagnetic valve, described inlet valve is between described electromagnetic valve and described plunger cavity.
Further, described inlet valve includes that valve body and valve seat, described valve seat are fixed on described plunger bushing or described valve seat is integral type with plunger bushing.
Further, the described pump housing offering screwed hole, this screwed hole communicates with described plunger cavity, and this screw hole has bleeder screw.
A kind of diesel engine, including body, is provided with the high-pressure oil pump of above-mentioned band inlet valve in this body.
Further, this diesel engine is single cylinder diesel or two-cylinder diesel.
The invention has the beneficial effects as follows: the high-pressure oil pump of the band inlet valve that the present invention is obtained by above-mentioned design and diesel engine, this design makes to eliminate on plunger the processing of straight trough and skewed slot, significantly reduce difficulty of processing, improve plunger precision, plunger bushing also eliminates offering of fuel feed hole, reduce difficulty of processing and processing cost, improve plunger bushing intensity, the cooperation making plunger and plunger bushing is more perfect, runs more smooth and easy, and the life-span is higher.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only certain embodiments of the present invention, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 is the structural representation that in prior art mesohigh oil pump, plunger and plunger bushing connect；
Fig. 2 be the band inlet valve that embodiment of the present invention provides high-pressure oil pump in the structural representation that connects of plunger and plunger bushing；
Fig. 3 be the band inlet valve that embodiment of the present invention provides high-pressure oil pump in the structural representation of plunger；
Fig. 4 is the schematic diagram of the high-pressure oil pump of the band inlet valve that embodiment of the present invention provides；
Fig. 5 is the cross-sectional schematic of the high-pressure oil pump of the band inlet valve that embodiment of the present invention provides；
Fig. 6 is the schematic front view of the high-pressure oil pump of the band inlet valve that embodiment of the present invention provides；
Fig. 7 be the band inlet valve that embodiment of the present invention provides high-pressure oil pump in the attachment structure schematic diagram of back leakage connection.
Figure acceptance of the bid note is respectively as follows:
Inlet valve 1；
Sealed steel ball 2；
Bleeder screw 3；
Sealing gasket 4；
Filter screen 5；
Tappet parts 6；
Spring base 7；
Lower seal 8；
Fuel tap parts 9；
Oil outlet valve spring 10；
The control fuel tap seat of honour 11；
Upper sealing ring 12；
The control tight cap of fuel tap 13；
Back leakage connection 14；
Fillister head screw 15；
Spring washer 16；
Plunger spring 17；
Guider screw 18；
Sheath 19；
Seal washer 20；
Oil-feed bolt member 21；
Plunger matching parts 22；
Fuel inlet fitting helmet 23；
Back leakage connection helmet 24；
Plunger 30；
Plunger bushing 31；
Plunger cavity 32；
Gas pressure relief slot 33；
Delivery valve 34.
Detailed description of the invention
For making the purpose of embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the accompanying drawing in embodiment of the present invention, technical scheme in embodiment of the present invention is clearly and completely described, obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.Therefore, the detailed description to the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of claimed invention below, but is merely representative of the selected embodiment of the present invention.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of protection of the invention.
In describing the invention, it will be appreciated that, the term of indicating position or position relationship is based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication equipment or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
In the present invention, unless otherwise clearly defined and limited, term " is installed ", " being connected ", " connection ", the term such as " fixing " should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be to be mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature can include that on or below second feature the first and second features directly contact, it is also possible to includes that the first and second features are not directly contact but by the other characterisation contact between them.And, fisrt feature on second feature, above and above include that fisrt feature directly over second feature and oblique upper, or is merely representative of fisrt feature level height higher than second feature.Fisrt feature under second feature, lower section and fisrt feature included below are immediately below second feature and obliquely downward, or are merely representative of fisrt feature level height less than second feature.
Embodiment 1, refers to Fig. 1-Fig. 7.
Present embodiments provide the high-pressure oil pump of a kind of band inlet valve, can apply to diesel engine, it is also possible to be applied on other equipment.High-pressure oil pump can be referred to as.
This high-pressure oil pump mainly includes the pump housing, the pump housing is the body junction component of this high-pressure oil pump, it is used for realizing its major function as oil pump, this pump housing includes plunger 30 and plunger bushing 31, plunger 30 and plunger bushing 31 are the main components of high-pressure oil pump, operationally the relative plunger bushing 31 of plunger 30 moves, and makes the pump housing work.In addition to both parts, the pump housing can also include miscellaneous part or assembly, such as drive mechanism, plunger matching parts etc..
Specifically, in the present embodiment, plunger bushing 31 inside for hollow structure and forms plunger cavity 32, plunger 30 is located in this plunger cavity 32, the pump housing is provided with inlet valve 1, and the end of plunger cavity 32 is located at by this inlet valve 1, and this inlet valve 1 is for controlling the oil inlet quantity of plunger cavity 32.
As shown in Figure 1, in the prior art, in conventional high-tension oil pump, being provided with fuel feed hole on plunger bushing sidewall, be provided with straight trough and skewed slot on plunger, oil is that fuel feed hole enters inside plunger cavity by plunger bushing sidewall, by the angle of rotary plunger, make the position change of plunger skewed slot, and then the opening degree of change fuel feed hole, play the purpose controlling oil inlet quantity.The drawback of this design is, the processing request of skewed slot is the highest, uses environment poor, and fault rate is higher, controls the most accurate.
This design makes to eliminate on plunger 30 processing of straight trough and skewed slot, significantly reduce difficulty of processing, improve plunger 30 precision, plunger bushing 31 also eliminates offering of fuel feed hole, reducing difficulty of processing and processing cost, improve plunger bushing 31 intensity, the cooperation making plunger 30 and plunger bushing 31 is more perfect, running more smooth and easy, the life-span is higher.
Specifically, inlet valve 1 is cone valve, ball valve or flat valve.
The valve core sealed cover of cone valve is the conical surface, the most thus gain the name " cone valve ".Cone valve is compared with guiding valve, and cone valve can accomplish gapless between sealing surface, it is possible to completely cuts through oil circuit；Polluting insensitive to impurity in fluid, use occasion is extensive；Relative to ball valve, simple in construction, easy to manufacture；At cone valve valve port, the direction sudden change of liquid stream is little, and Flow Field Distribution is uniform.
Ball valve, is defined as: opening and closing element (spheroid) is driven by valve rod, and the valve rotated around ball valve axis.Also can be used for regulation and the control of fluid, the most firmly seal, between V-type ball valve its V-type core and metal seat valve of pile-up welding hard alloy, there is the strongest shearing force, be particularly well-suited to the medium of fibre-bearing, small solid material etc..And multi-pass ball valve not only can control the interflow of medium, shunting and the switching flowed on pipeline flexibly, also can close arbitrary passage simultaneously and make two other passage be connected.Ball valve is divided into according to type of drive: pneumatic ball valve, electrical ball valve, manual ball valve.
The inlet valve 1 using cone valve, ball valve or flat valve version is all capable of its function.
Alternatively, plunger 30 offering gas pressure relief slot 33, this gas pressure relief slot 33 is annular, and gas pressure relief slot 33 has one or spaced at least two.
Gas pressure relief slot 33 is referred to as pressure relief groove, when pressure is used for time excessive draining its internal pressure in plunger bushing 31, prevents fault or security incident, makes plunger 30 can run with security and stability in plunger bushing 31.
The most specifically, the pump housing being additionally provided with delivery valve 34, the end of plunger cavity 32 is also located at by delivery valve 34.Delivery valve 34 is used for controlling oil-out in plunger cavity 32.
Same, delivery valve 34 is cone valve, ball valve or flat valve.The delivery valve 34 of these structures all can complete its function.
Specifically, the pump housing being additionally provided with electromagnetic valve, inlet valve 1 is between electromagnetic valve and plunger cavity 32.The electromagnetic valve that plunger cavity 32 front end is arranged can control to lead to the oil mass of plunger cavity 32, and specifically, the aperture of electromagnetic valve is controlled by control system, particular by the electric current of PWM pulse-width controlled electromagnetic valve.PWM (English full name: PulseWidthModulation) control technology is exactly the technology that the width to pulse is modulated, i.e. by the width of a series of pulses is modulated, carry out the waveform (containing shape and amplitude) required for equivalent acquisition.Pulse width modulation is the very effective technology of one utilizing the digital output of microprocessor to be controlled analog circuit, is widely used in from the many fields measuring, communicating power control and conversion.
One advantage of PWM is all digital form from processor to controlled system signal, is carrying out digital-to-analogue conversion.Influence of noise can be preferably minimized (can be as computer }.Noise only by force to when being enough to logic 1 be changed into logical zero or logical zero is changed into logic 1, also could produce impact to digital signal.It is the another one advantage that controls relative to simulation of PWM to the enhancing of noise resistivity, and this is also that PWM is sometimes being used for the main cause of communication.PWM is turned to can greatly to extend communication distance from analogue signal.At receiving terminal, modulation high frequency square wave can be filtered by suitable RC or LC network and be analog form by signals revivification.
Controlling technology by PWM and realize the electric current control of electromagnetic valve, make control very accurate, accuracy is higher.
Specifically, inlet valve 1 includes valve body and valve seat, and valve seat is fixed on plunger bushing 31 or valve seat is integral type with plunger bushing 31.Inlet valve 1 is connected on the pump housing by valve seat, operationally valve body work, plays the effect controlling oil mass.
Alternatively, the pump housing offering screwed hole, this screwed hole communicates with plunger cavity 32, and this screw hole has bleeder screw 3.Regulation bleeder screw 3 can discharge the gas within plunger cavity 32, the pressure within pilot plunger chamber 32 so that it is is in stable duty.
Referring to Fig. 5-Fig. 7, in addition to above-mentioned parts, high-pressure oil pump can also include sealed steel ball 2, is used for sealing；Filter screen 5, the impurity being used in oil strain；Tappet parts 6, spring base 7, lower seal 8, fuel tap parts 9, oil outlet valve spring 10, controls the fuel tap seat of honour 11, upper sealing ring 12, the control tight cap of fuel tap 13, back leakage connection 14, fillister head screw 15, spring washer 16, plunger spring 17, guider screw 18, sheath 19, seal washer 20, oil-feed bolt member 21, plunger matching parts 22, fuel inlet fitting helmet 23, back leakage connection helmet 24 parts such as grade.
Embodiment 2.
Present embodiments provide a kind of diesel engine, including body, in this body, be provided with the high-pressure oil pump of above-mentioned band inlet valve.
Specifically, this diesel engine is single cylinder diesel or two-cylinder diesel.Contain the diesel engine of this high-pressure oil pump, be single cylinder engine diesel engine, the two-cylinder diesel basis that realizes electronic fuel injection, there are the biggest economic benefits, be the automatically controlled important change of single cylinder diesel, two-cylinder diesel technology upgrading.
Electrocontrolled high-pressure common rail fuel injection system has successfully been used on single cylinder, two-cylinder diesel.Owing to increasing inlet valve 1 in plunger cavity 32 so that in plunger cavity 32, oil mass is entered by inlet valve 1, when the up pressurization of plunger 30, owing to pressure change makes inlet valve 1 close, delivery valve 34 is opened, supply pressure fuel oil.
Owing to have employed single inlet valve 1 so that plunger 30 is optimized significantly without flume structure, the processing of plunger 30, and seal length is effectively increased so that plunger 30 performance is greatly improved.By increasing gas pressure relief slot 33, so that pressure effectively improves in plunger cavity 32, but gas pressure relief slot 33 can be cancelled according to actual design.Control by other attached parts parts so that fuel-flow control is reliable and stable.
The application of inlet valve 1 is the basis that single cylinder diesel, two-cylinder diesel realize that electric-controlled co-rail controls, and only uses inlet valve 1, single cylinder diesel, two-cylinder diesel just can be made to realize diesel electric-controlled high-pressure common rail technology, so meaning is the hugest.
The foregoing is only the preferred embodiment of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (10)
1. the high-pressure oil pump of a band inlet valve, it is characterised in that include the pump housing, this pump housing includes that plunger and plunger bushing, described plunger bushing inside for hollow structure and form plunger cavity, and described plunger is located in this plunger cavity；The described pump housing is provided with inlet valve, and the end of described plunger cavity is located at by this inlet valve, and this inlet valve is for controlling the oil inlet quantity of described plunger cavity.
The high-pressure oil pump of band inlet valve the most according to claim 1, it is characterised in that described inlet valve is cone valve, ball valve or flat valve.
The high-pressure oil pump of band inlet valve the most according to claim 1, it is characterised in that offer gas pressure relief slot on described plunger, this gas pressure relief slot is annular, and described gas pressure relief slot has one or spaced at least two.
The high-pressure oil pump of band inlet valve the most according to claim 1, it is characterised in that be additionally provided with delivery valve on the described pump housing, the end of described plunger cavity is also located at by described delivery valve.
The high-pressure oil pump of band inlet valve the most according to claim 4, it is characterised in that described delivery valve is cone valve, ball valve or flat valve.
The high-pressure oil pump of band inlet valve the most according to claim 1, it is characterised in that be additionally provided with electromagnetic valve on the described pump housing, described inlet valve is between described electromagnetic valve and described plunger cavity.
The high-pressure oil pump of band inlet valve the most according to claim 1, it is characterised in that described inlet valve includes that valve body and valve seat, described valve seat are fixed on described plunger bushing or described valve seat is integral type with plunger bushing.
The high-pressure oil pump of band inlet valve the most according to claim 1, it is characterised in that offer screwed hole on the described pump housing, this screwed hole communicates with described plunger cavity, and this screw hole has bleeder screw.
9. a diesel engine, it is characterised in that include body, is provided with the high-pressure oil pump of band inlet valve described in any one of claim 1-8 in this body.
Diesel engine the most according to claim 9, it is characterised in that this diesel engine is single cylinder diesel or two-cylinder diesel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610353488.5A CN105822476A (en) | 2016-05-25 | 2016-05-25 | High-pressure oil pump with oil inlet valve and diesel engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610353488.5A CN105822476A (en) | 2016-05-25 | 2016-05-25 | High-pressure oil pump with oil inlet valve and diesel engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105822476A true CN105822476A (en) | 2016-08-03 |
Family
ID=56530411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610353488.5A Pending CN105822476A (en) | 2016-05-25 | 2016-05-25 | High-pressure oil pump with oil inlet valve and diesel engine |
Country Status (1)
| Country | Link |
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| CN (1) | CN105822476A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111373139A (en) * | 2017-11-16 | 2020-07-03 | 日立汽车系统株式会社 | High-pressure fuel pump |
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| CN105508107A (en) * | 2016-01-14 | 2016-04-20 | 辽宁新风企业集团有限公司 | Integrated high-pressure oil pump assembly for high-pressure common-rail fuel injection system of diesel engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111373139A (en) * | 2017-11-16 | 2020-07-03 | 日立汽车系统株式会社 | High-pressure fuel pump |
| CN111373139B (en) * | 2017-11-16 | 2022-03-11 | 日立安斯泰莫株式会社 | High-pressure fuel pump |
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Application publication date: 20160803 |
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