CN204163906U - Plane cam diaphragm type fuel pump for dimethyl ether engine - Google Patents
Plane cam diaphragm type fuel pump for dimethyl ether engine Download PDFInfo
- Publication number
- CN204163906U CN204163906U CN201420415070.9U CN201420415070U CN204163906U CN 204163906 U CN204163906 U CN 204163906U CN 201420415070 U CN201420415070 U CN 201420415070U CN 204163906 U CN204163906 U CN 204163906U
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- Prior art keywords
- dimethyl ether
- pump head
- face cam
- plunger
- casing
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Abstract
The utility model relates to a plane cam diaphragm type fuel pump for dimethyl ether engine, the power distribution box comprises a box body, the drive shaft is installed to box one side, be provided with the transmission that can turn into linear motion with the rotation of drive shaft in the box intracavity, the pump head is installed to the box opposite side, the pump head includes left pump head and right pump head, left side pump head and right pump head are divided into independent two parts by the diaphragm at the common cavity that forms of faying face department, and half sealed hydraulic oil forms pneumatic cylinder structure, and other half suction-discharge dimethyl ether, characteristics such as overall structure is simple fuel feeding efficiency is high, pressure pulse is little can effectively solve the plunger matching parts wearing and tearing problem that dimethyl ether brought because of low viscosity to can satisfy automobile-used requirement.
Description
Technical field
The utility model relates to engine art, refers to a kind of dimethyl ether engine face cam diaphragm type petrolift particularly.
Background technique
Dimethyl ether because of its there is no that toxicity, boiling point are low, source is wide, cost is low and its cetane levels higher than diesel oil by one of clean fuel of instead diesel oil.Research shows, dimethyl ether fuel can make the power of traditional diesel engine with direct injection improve 16%, and the thermal efficiency improves 2% ~ 3%, NOx emission reduces about 40%, the rate of pressure rise drops to 0.28 ~ 0.47MPa/ DEG C of A by an original 0.6MPa/ DEG C A, and realize smokeless combustion, noise also obviously reduces; Even can meet strict Europe the IVth stage emission limitation standard and California, USA ultra-low emission vehicle (ULEV) standard.
But there is notable difference and can not directly use on a diesel engine in the physicochemical characteristic of dimethyl ether compared with diesel oil, first dimethyl ether atomization pressure is at about 10MPa, and diesel oil atomization pressure is at 80 ~ 90MPa, so dimethyl ether does not need the diesel engine fuel injecting pump-unit of high pressure like this, secondly, the low viscosity (viscosity is about 1/10 ~ 1/20 of diesel oil) of dimethyl ether easily causes the plunger coupled parts of the Injection Pump in high-pressure fuel supply system very easily to wear and tear, and causes the consequences such as the not enough and pump oil pressure of fuel duty is low.
In existing research, mainly contain wearing and tearing and leakage problem that two schemes solves plunger and bare of injection pump: one be by dimethyl ether and diesel oil used in combination at high proportion, another kind adds lubrication modifier in dimethyl ether fuel.Research shows, though dimethyl ether and diesel blended fuel can improve high-pressure plunger coupler member premature wear and leakage effectively relative to pure Dimethyl ether at high proportion, in the long run/term, does not solve wearing and tearing and the leakage problem of plunger and bare of injection pump at all; In addition, add lubrication modifier in dimethyl ether fuel after, though matching part abrasion can be alleviated to a certain extent, will negative effect be caused to combustion and emission performance, obviously can produce particle after adding quantity exceedes certain proportion, be i.e. the discharge of PM.
Based on the above, existing Injection Pump can not meet dimethyl ether engine demand for fuel, needs the Injection Pump designing a kind of novel applicable dimethyl ether engine.
Summary of the invention
The purpose of this utility model is exactly will overcome above-mentionedly to overcome the pressurization demand that existing Injection Pump can not meet dimethyl ether engine fuel, the dimethyl ether engine face cam diaphragm type petrolift that provide a kind of structure simple, pressure is little, the wear and leakage problem that the low viscosity of dimethyl ether is brought can be solved.
To achieve these goals, dimethyl ether engine designed by the utility model face cam diaphragm type petrolift, comprise casing, live axle with rolling bearing will be converted into the transmission device of straight line motion, plunger and pump head, described live axle is connected with the input end of transmission device through casing side sidewall, described rolling bearing to be arranged in casing and to abut with the inwall of casing, described transmission device is positioned at casing, described plunger is connected with the output terminal of transmission device, it is characterized in that: described pump head comprises the left pump head being provided with hydraulic pressure cavity and oilhole and the right pump head being provided with dimethyl ether passage and dimethyl ether through hole, described left pump head is fixed on casing, described hydraulic pressure cavity is positioned at casing and is tightly connected by one end of gland nut and plunger, described right pump head is connected with left pump head and junction plane place is hollow cavity structure, described hollow cavity structure is separated to form left part fluid chamber and right part dimethyl ether chamber by medial septum, described fluid chamber is communicated with by oilhole with between hydraulic pressure cavity, described dimethyl ether passage is communicated with by dimethyl ether through hole with between dimethyl ether chamber, the two ends of described dimethyl ether passage are respectively equipped with oil outlet and oil inlet hole.
Further, described transmission device comprises the turning rolls be fixed on casing, coupling and face cam dish, described turning rolls is socketed in live axle and is also connected with the live axle shaft shoulder and roller disk respectively outward, described roller disk is provided with multiple roller, coupling is provided with in described turning rolls, described shaft joint one end is connected with live axle axle head, the other end is connected with face cam dish, the A face of described face cam dish is provided with multiple cam, described A face abuts with roller, and the B face of described face cam dish is connected with the other end of plunger.Face cam dish rotates one week, and plunger can move back and forth four times, improves fuel feeding efficiency, decreases the stroke of plunger, thus effectively reduces barrier film and move winding degree, like this while ensure that dimethyl ether fuel flow, considerably increases the working life of barrier film.
Further, for convenience of dismounting, the inwall of described casing is provided with on half of flange, one end of described plunger is inserted in hydraulic pressure cavity through half of flange, the other end of described plunger is provided with annular boss, described annular boss abuts with the B face of face cam dish, and described plunger is set with piston spring, and the two ends of described piston spring abut with annular boss and half of flange respectively.
Again further, described roller has 4 and is 90 ° of settings in phase difference, and described cam has 4 and is 90 ° of settings in phase difference.Make uniform force, oil spout is steady.
Again further, described oilhole has 2 ~ 5; Described dimethyl ether through hole has 2 ~ 5.
Again further, described coupling being provided with 4 phase differences is 90 ° of connecting grooves arranged, and wherein two connecting grooves be oppositely arranged are connected with live axle, and two other connecting groove be oppositely arranged connects with face cam dish.
Again further, the matching gap between described plunger sidewall and hydraulic pressure cavity inwall is 0.0013 ~ 0.0026mm, facilitates fluid to the lubrication of assembly.
For convenience of dismounting, described casing adopts sectional combination structure.
Again further, described pump head also comprises the valvular lubricating cup of band, and described left pump head is also provided with oil transportation through hole, and lubricating cup is communicated with fluid chamber by oil transportation through hole.Repairing can be carried out to fluid chamber and also play pressure release effect when fluid cavity pressure is excessive simultaneously.
The utility model has the advantage of: design the face cam dish with four rolling, face cam spirals and circles, plunger reciprocable four times, improves working efficiency, decreases the stroke of plunger while ensure that fuel injection quantity, reduces the dynamic winding degree of barrier film.Secondly, design of diaphragm separates hydraulic oil and dimethyl ether fuel, make dimethyl ether fuel not with plunger contact, effectively can solve the plunger wear problem that the low viscosity of dimethyl ether is brought.Overall structure is simply compact, fuel feeding efficiency is high, pressure pulse is little, can meet automobile-usedization requirement greatly.
Accompanying drawing explanation
Fig. 1 is a kind of dimethyl ether engine face cam diaphragm type fuel pump structure schematic diagram.
Fig. 2 is transmission device detonation configuration schematic diagram in Fig. 1.
In figure: live axle 1 (wherein: rolling bearing 1.1), casing 2, transmission device 3 (wherein: turning rolls 3.1, coupling 3.2, face cam dish 3.3, cam 3.31, roller disk 3.4, roller 3.41), pump head 4 (wherein: left pump head 4.1, hydraulic pressure cavity 4.11, fluid chamber 4.12, oilhole 4.13, gland nut 4.14, round nut 4.15, right pump head 4.2, dimethyl ether chamber 4.21, dimethyl ether passage 4.22, dimethyl ether through hole 4.23, oil outlet 4.24, oil inlet hole 4.25, barrier film 4.3, lubricating cup 4.4, hollow cavity 4.5), plunger 5 (wherein: piston spring 5.1), half of flange 6.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Dimethyl ether engine shown in figure face cam diaphragm type petrolift, comprise casing 2, with the live axle 1 of rolling bearing 1.1, the transmission device 3 of straight line motion will be converted into, plunger 5 and pump head 4, described live axle 1 is connected with the input end of transmission device 3 through casing 2 side sidewall, rolling bearing 1.1 to be arranged in casing 2 and to abut with the inwall of casing 2, described transmission device 3 is positioned at casing 2, plunger 5 is connected with the output terminal of transmission device 3, pump head 4 comprises the left pump head 4.1 being provided with hydraulic pressure cavity 4.11 and oilhole 4.13 and the right pump head 4.2 being provided with dimethyl ether passage 4.22 and dimethyl ether through hole 4.23, left pump head 4.1 is fixed on casing 2, hydraulic pressure cavity 4.11 is positioned at casing 2 and is tightly connected by gland nut 4.14 one end with plunger 5, right pump head 4.2 is connected with left pump head 4.1 and junction plane place is hollow cavity 4.5 structure, hollow cavity 4.5 structure is separated to form left part fluid chamber 4.12 and right part dimethyl ether chamber 4.21 by medial septum 4.3, be communicated with by 2 ~ 5 oilholes 4.13 between fluid chamber 4.12 with hydraulic pressure cavity 4.11, fluid chamber 4.12 is communicated with the valvular lubricating cup 4.4 of band by oil transportation through hole, be communicated with by 2 ~ 5 dimethyl ether through holes 4.23 between dimethyl ether passage 4.22 with dimethyl ether chamber 4.21, the two ends of dimethyl ether passage 4.22 are respectively equipped with oil outlet 4.24 and oil inlet hole 4.25.
In order to increase work efficiency on the basis of certain fuel delivery, transmission 3 is improved, transmission device 3 after improvement comprises the turning rolls 3.1 be fixed on casing 2, coupling 3.2 and face cam dish 3.3, turning rolls 3.1 is socketed in outside live axle 1 and is also connected with live axle 1 shaft shoulder and roller disk 3.4 respectively, roller disk 3.4 is provided with the roller 3.41 that 4 phase differences are 90 °, coupling 3.2 is provided with in turning rolls 3.4, coupling 3.2 being provided with 4 phase differences is 90 ° of connecting grooves 3.21 arranged, wherein two connecting grooves be oppositely arranged 3.21 are connected with live axle 1, the connecting groove 3.21 that two other is oppositely arranged connects with face cam dish 3.3, it is that cam 3.31, the A face 3.32 of 90 ° abuts with roller 3.41 that the A face 3.32 of face cam dish 3.3 is provided with 4 phase differences, and the B face 3.33 of face cam dish 3.3 is connected with the other end of plunger 5.Face cam dish 3.3 rotates a circle, and plunger reciprocable four times, reduces plunger stroke, reduces the dynamic winding degree of barrier film.
In this device, plunger 5 arranges employing demountable structure, wherein, the inwall of casing 2 is provided with on half of flange 6, and one end of plunger 5 is inserted in hydraulic pressure cavity 4.11 through half of flange 6, and the matching gap between plunger 5 sidewall and hydraulic pressure cavity 4.11 inwall is 0.0013 ~ 0.0026mm; The other end of plunger 5 is provided with annular boss 5.2, and annular boss 5.2 abuts with the B face 3.33 of face cam dish 3.3, plunger 5 is set with piston spring 5.1, and the two ends of piston spring 5.1 abut with annular boss 5.2 and half of flange 6 respectively.
For convenience of installation and removal, casing 2 entirety adopts sectional combination structure, connects in conjunction with by bolt.
The movement process of this programme is as follows: rotate under the power that live axle 1 provides at outer, face cam dish 3.3 is driven to rotate by coupling 3.2, because the atomization pressure of dimethyl ether is lower, the delivery pressure of about 10MPa only need be provided, four cams 3.31 of face cam dish 3.3 and four rolling 3.41 movable contact of roller disk 3.4, by shaft joint 3.2 by the transmission of power of live axle 1 on face cam dish 3.3, drive face cam dish 3.3 to carry out rotary reciprocating motion, thus promote plunger 5 to-and-fro motion; The to-and-fro motion of plunger 5 makes hydraulic oil presses against diaphragm 4.3 back and forth, and barrier film 4.3 is agitated repeatedly, thus reaches the object of suction dimethyl ether fuel, and the physical property of the setting of barrier film 4.3 also comprehensive dimethyl ether is arranged.Face cam dish 3.3 is provided with four little cams 3.31, phase difference is 90 °, face cam dish 3.3 often rotates a circle, plunger 5 moves back and forth four times, improve fuel feeding efficiency, decrease the stroke of plunger 5, thus effectively reduce the dynamic winding degree of barrier film 4.3, like this while ensure that dimethyl ether fuel flow, considerably increase the working life of barrier film 4.3.And barrier film 4.3 separates hydraulic oil and dimethyl ether fuel, and dimethyl ether fuel does not contact with plunger 5.Effectively solve plunger 5 wear problem that the low viscosity of dimethyl ether is brought.This petrolift has the features such as structure is simple, fuel feeding efficiency is high, pressure pulse is little, effectively can solve the Wear of Plunger Pair problem that dimethyl ether brings because of low viscosity, and can meet automobile-usedization requirement.
Claims (10)
1. a dimethyl ether engine face cam diaphragm type petrolift, comprise casing (2), with the live axle (1) of rolling bearing (1.1), the transmission device (3) of straight line motion will be converted into, plunger (5) and pump head (4), described live axle (1) is connected with the input end of transmission device (3) through casing (2) side sidewall, described rolling bearing (1.1) to be arranged in casing (2) and to abut with the inwall of casing (2), described transmission device (3) is positioned at casing (2), described plunger (5) is connected with the output terminal of transmission device (3), it is characterized in that: described pump head (4) comprises the left pump head (4.1) being provided with hydraulic pressure cavity (4.11) and oilhole (4.13) and the right pump head (4.2) being provided with dimethyl ether passage (4.22) and dimethyl ether through hole (4.23), described left pump head (4.1) is fixed on casing (2), described hydraulic pressure cavity (4.11) is positioned at casing (2) and is tightly connected by gland nut (4.14) one end with plunger (5), described right pump head (4.2) is connected with left pump head (4.1) and junction plane place is hollow cavity (4.5) structure, described hollow cavity (4.5) structure is separated to form left part fluid chamber (4.12) and right part dimethyl ether chamber (4.21) by medial septum (4.3), described fluid chamber (4.12) is communicated with by oilhole (4.13) with between hydraulic pressure cavity (4.11), described dimethyl ether passage (4.22) is communicated with by dimethyl ether through hole (4.23) with between dimethyl ether chamber (4.21), the two ends of described dimethyl ether passage (4.22) are respectively equipped with oil outlet (4.24) and oil inlet hole (4.25).
2. dimethyl ether engine face cam diaphragm type petrolift according to claim 1, it is characterized in that: described transmission device (3) comprises the turning rolls (3.1) be fixed on casing (2), coupling (3.2) and face cam dish (3.3), described turning rolls (3.1) is socketed in live axle (1) and be connected with live axle (1) shaft shoulder and roller disk (3.4) respectively outward, described roller disk (3.4) is provided with multiple roller (3.41), coupling (3.2) is provided with in described turning rolls (3.4), described shaft joint (3.2) one end is connected with live axle (1) axle head, the other end is connected with face cam dish (3.3), the A face (3.32) of described face cam dish (3.3) is provided with multiple cam (3.31), described A face (3.32) abuts with roller (3.41), the B face (3.33) of described face cam dish (3.3) is connected with the other end of plunger (5).
3. dimethyl ether engine face cam diaphragm type petrolift according to claim 2, it is characterized in that: the inwall of described casing (2) is provided with on half of flange (6), one end of described plunger (5) is inserted in hydraulic pressure cavity (4.11) through half of flange (6), the other end of described plunger (5) is provided with annular boss (5.2), described annular boss (5.2) abuts with the B face (3.33) of face cam dish (3.3), described plunger (5) is set with piston spring (5.1), the two ends of described piston spring (5.1) abut with annular boss (5.2) and half of flange (6) respectively.
4. the face cam diaphragm type petrolift of the dimethyl ether engine according to Claims 2 or 3, it is characterized in that: described roller (3.41) has 4 and is 90 ° of settings in phase difference, described cam (3.31) has 4 and is 90 ° of settings in phase difference.
5. the face cam diaphragm type petrolift of the dimethyl ether engine according to any one of claim 1-3, is characterized in that: described oilhole (4.13) has 2 ~ 5.
6. the face cam diaphragm type petrolift of the dimethyl ether engine according to any one of claim 1-3, is characterized in that: described dimethyl ether through hole (4.23) has 2 ~ 5.
7. the face cam diaphragm type petrolift of the dimethyl ether engine according to Claims 2 or 3, it is characterized in that: described coupling (3.2) being provided with 4 phase differences is 90 ° of connecting grooves (3.21) arranged, wherein two connecting grooves be oppositely arranged (3.21) are connected with live axle (1), and two other connecting groove be oppositely arranged (3.21) connects with face cam dish (3.3).
8. the face cam diaphragm type petrolift of the dimethyl ether engine according to any one of claim 1-3, is characterized in that: the matching gap between described plunger (5) sidewall and hydraulic pressure cavity (4.11) inwall is 0.0013 ~ 0.0026mm.
9. the face cam diaphragm type petrolift of the dimethyl ether engine according to any one of claim 1-3, is characterized in that: described casing (2) adopts sectional combination structure.
10. the face cam diaphragm type petrolift of the dimethyl ether engine according to any one of claim 1-3, it is characterized in that: described pump head (4) also comprises the valvular lubricating cup of band (4.4), described left pump head (4.1) is also provided with oil transportation through hole, and lubricating cup (4.4) is communicated with fluid chamber (4.12) by oil transportation through hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415070.9U CN204163906U (en) | 2014-07-25 | 2014-07-25 | Plane cam diaphragm type fuel pump for dimethyl ether engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420415070.9U CN204163906U (en) | 2014-07-25 | 2014-07-25 | Plane cam diaphragm type fuel pump for dimethyl ether engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204163906U true CN204163906U (en) | 2015-02-18 |
Family
ID=52537602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420415070.9U Expired - Fee Related CN204163906U (en) | 2014-07-25 | 2014-07-25 | Plane cam diaphragm type fuel pump for dimethyl ether engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204163906U (en) |
-
2014
- 2014-07-25 CN CN201420415070.9U patent/CN204163906U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150218 Termination date: 20160725 |