CN202007730U - Fuel feed system of dimethyl ether engine and fuel injection pump thereof - Google Patents
Fuel feed system of dimethyl ether engine and fuel injection pump thereof Download PDFInfo
- Publication number
- CN202007730U CN202007730U CN2011200894129U CN201120089412U CN202007730U CN 202007730 U CN202007730 U CN 202007730U CN 2011200894129 U CN2011200894129 U CN 2011200894129U CN 201120089412 U CN201120089412 U CN 201120089412U CN 202007730 U CN202007730 U CN 202007730U
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- plunger
- dimethyl ether
- injection pump
- plunger bushing
- resistant coating
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Abstract
The utility model discloses a dimethyl ether fuel injection pump. A plunger bushing and a plunger are arranged in the inner cavity of the pump body; a delivery valve seat provided with an axial through hole is further arranged on the dimethyl ether fuel injection pump; one end of the through hole is communicated with the oil cavity of the plunger bushing, and a valve port is formed at the other end of the through hole; a delivery valve is further arranged in the inner cavity of the pump body and axially moves along the through hole for controlling the connection and disconnection of the valve port; and a wear-resistant coating is arranged on the contact surface of the plunger bushing and the plunger. The fuel injection pump provided by the utility model bears the friction caused by the relative reciprocating movement between the plunger bushing and the plunger through the wear-resistant coating. Therefore, the abrasion of the fuel injection pump between the plunger bushing and the plunger can be reduced, the service life of the fuel injection pump is prolonged, and the performance of the engine is improved. Moreover, the wear-resistant coating has relatively thin thickness and can be well attached to the contact surface of the inner peripheral wall of the plunger bushing or the outer peripheral wall of the plunger so that the matching accuracy is improved. The utility model further discloses a fuel feed system of a dimethyl ether engine comprising the fuel injection pump.
Description
Technical field
The utility model relates to technical field of engines, particularly a kind of dimethyl ether Injection Pump.The utility model also relates to a kind of dimethyl ether engine fuel oil supply system that comprises above-mentioned dimethyl ether Injection Pump.
Background technique
Dimethyl ether has the advantages that boiling point is low, the volume calorific value is low and viscosity is low, compression ignition combustion under high compression ratio, has the thermal efficiency with the diesel engine equivalence, do not contain the c-c key in the dimethyl ether molecular formula simultaneously, can realize smokeless combustion, therefore, dimethyl ether can be realized clean burning as the fuel of compression ignition engine, is a kind of green energy resource of excellence.
The dimethyl ether engine fuel oil supply system is made up of the parts such as fuel pot, suction booster, high-pressure service pump and oil sprayer that store dimethyl ether fuel usually.During work, suction booster obtains dimethyl ether fuel from fuel pot, is pressed into after the pressurization in suction booster and the pipeline that high-pressure service pump is communicated with, enters high-pressure service pump then, high-pressure service pump is again with the dimethyl ether fuel feeding oil sprayer, and oil sprayer sprays into dimethyl ether in the cylinder body of motor and burns with air mixing.
The inside of Injection Pump has plunger coupled parts (plunger and plunger bushing), transmission part, roller body and cam of injection pump, and the oil suction of Injection Pump and pressure oil mainly are to finish by the to-and-fro motion of plunger in plunger bushing.When cam of injection pump rotated, if roller body rolls on the basic circle face of cam of injection pump, then plunger was parked in the position of plunger lower dead center, and at this moment, the oilhole on the plunger bushing is opened, and then the interior oil duct of plunger bushing inner chamber and the pump housing communicates, and fuel oil is filled with the grease chamber rapidly; When roller body is rolled into the ascent stage of cam of injection pump, plunger just moves under the transmission part effect, from plunger begin to move up to the plunger bushing oilhole by the plunger upper-end surface block before till, this section lift is a pretravel, when plunger blocks oilhole, move on plunger continues and just begin to press oily process, the fuel oil in the oil pocket raises in the effect downforce of plunger, when its pressure surpassed the pretightening force of oil outlet valve spring, dimethyl ether backed down outlet valve and flows into high-pressure oil pipe by the high-pressure oil pipe joint.When plunger continues to move upward, till when fuel feeding continues to spiral hypotenuse on the plunger and gets out of the way the plunger bushing spill port, when spill port is opened, high pressure oil flows back to oil duct in the pump housing from the cannelure and the spill port on the plunger bushing of oil pocket on plunger, this moment, the oil pressure of plunger bushing grease chamber reduced rapidly, the effect of outlet valve oil pressure in spring and the high-pressure oil pipe valve seat that falls back, oil sprayer stops oil spout immediately.
As shown in the above, the plunger of Injection Pump is done periodic to-and-fro motion in plunger bushing, outlet valve is also done periodically to contact and detaching motion with valve seat, because the viscosity of dimethyl ether is very low, therefore, the contact surface abrasion of plunger coupled parts and delivery valve matching parts is serious, and the wearing and tearing of plunger coupled parts then cause reduce the working life of oil sprayer, influence engine performance; The wearing and tearing of delivery valve matching parts can cause outlet valve poorly sealed, and the residual pressure in the high-pressure oil pipe can not keep constant, causes the engine operation instability.
Therefore, how reducing the wearing and tearing of plunger coupled parts in the Injection Pump and delivery valve matching parts, improve the working life of Injection Pump and promote the performance of motor, is those skilled in the art's technical issues that need to address.
The model utility content
A purpose of the present utility model provides a kind of dimethyl ether Injection Pump, and the surface of contact of this dimethyl ether plunger and bare of injection pump has wear resistant coating, can reduce the wearing and tearing between the plunger coupled parts, improves the working life of Injection Pump and promotes the performance of motor.Another purpose of the present utility model provides a kind of dimethyl ether engine fuel oil supply system that comprises above-mentioned dimethyl ether Injection Pump.
For reaching first purpose of the present utility model, the utility model provides a kind of dimethyl ether Injection Pump, be provided with plunger and plunger bushing in the inner chamber of its pump housing with grease chamber, delivery valve seat with valve port also is set, also be provided with the outlet valve that moves vertically with grease chamber's break-make of controlling described valve port and described plunger bushing in the inner chamber of the described pump housing, the surface of contact of described plunger and described plunger bushing has wear resistant coating.
Preferably, the lower end of described plunger has oil storage tank, is positioned at described oil storage tank on the described plunger and has the plunger wear resistant coating with the periphery wall on top.
Preferably, the surface of contact of described outlet valve and described delivery valve seat has wear resistant coating.
Preferably, be provided with at least one perfluor ether cushion rubber between the periphery wall of the inner circle wall of the described pump housing and described plunger bushing.
Preferably, described plunger bushing has the upper end cavity, and described upper end cavity is mid-described delivery valve seat and high-pressure oil pipe joint, and the lower end of the top of described delivery valve seat and high-pressure oil pipe joint joins; Be provided with perfluor ether seal ring between the inner circle wall of the periphery wall of described high-pressure oil pipe joint and described plunger bushing upper end cavity.
After the surface of contact of plunger and plunger bushing has wear resistant coating in the Injection Pump that this model utility provides, then in the high frequency to-and-fro motion process of plunger, bear the friction that does relatively reciprocating motion and brought between plunger bushing and the plunger by wear resistant coating always, thereby can reduce the plunger bushing of Injection Pump and the wearing and tearing between the plunger effectively, prolong the working life of Injection Pump, improve the performance of motor; In addition, the thinner thickness of wear resistant coating can be fitted in the surface of contact of plunger bushing inner circle wall or plunger periphery wall preferably, improves the accuracy of the two cooperation.
For reaching another purpose of the present utility model, the utility model also provides a kind of dimethyl ether engine fuel oil supply system, comprise the dimethyl ether fuel jar, the dimethyl ether Injection Pump that is connected with described dimethyl ether fuel jar, and the dimethyl ether oil sprayer that is connected with described dimethyl ether Injection Pump, described dimethyl ether Injection Pump is above-mentioned each described dimethyl ether Injection Pump.Because above-mentioned dimethyl ether Injection Pump has above-mentioned technique effect, the dimethyl ether engine fuel oil supply system with above-mentioned dimethyl ether Injection Pump also has identical technique effect.
Description of drawings
Fig. 1 provides the structural representation of a kind of embodiment of dimethyl ether Injection Pump for the utility model;
Fig. 2 is the structural representation of plunger coupled parts among Fig. 1;
Fig. 3 is the structural representation of plunger bushing among Fig. 2;
Fig. 4 is the structural representation of plunger among Fig. 2;
Fig. 5 provides the structural representation of delivery valve matching parts in the another kind of embodiment of dimethyl ether Injection Pump for the utility model;
Fig. 6 is the structural representation of outlet valve among Fig. 5;
Fig. 7 is the structural representation of delivery valve seat among Fig. 5;
Fig. 8 is the local enlarged diagram at A position among Fig. 1;
Fig. 9 is the local enlarged diagram at B position among Fig. 1.
Embodiment
A core of the present utility model provides a kind of dimethyl ether Injection Pump, and the surface of contact of this dimethyl ether plunger and bare of injection pump has wear resistant coating, can reduce the wearing and tearing between the plunger coupled parts, improves the working life of Injection Pump and promotes the performance energy of motor.Another core of the present utility model provides a kind of dimethyl ether engine fuel oil supply system that comprises above-mentioned dimethyl ether Injection Pump.
In order to make those skilled in the art understand the technical solution of the utility model better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4, Fig. 1 provides the structural representation of a kind of embodiment of dimethyl ether Injection Pump for the utility model; Fig. 2 is the structural representation of plunger coupled parts among Fig. 1; Fig. 3 is the structural representation of plunger bushing among Fig. 2; Fig. 4 is the structural representation of plunger among Fig. 2.
Dimethyl ether Injection Pump in this embodiment is provided with plunger bushing 31 and plunger 32 in the inner chamber of its pump housing 1, plunger 32 can move along the axial bore of plunger bushing 31, Spielpassung between the two; Delivery valve seat 41 and outlet valve 42 with axial hole also is set in the pump housing 1, delivery valve seat 41 is positioned on the grease chamber of plunger bushing 31, the grease chamber of plunger bushing 31 is the above inner chamber part in plunger 32 tops in the plunger bushing 31, one end of delivery valve seat 41 through holes is communicated with the grease chamber of plunger bushing 31, the other end of through hole is a valve port on the delivery valve seat 41, outlet valve 42 is blocked valve port under the preset pressure of oil outlet valve spring 6, then outlet valve 42 can move axially with control valve port break-make along delivery valve seat 41 through holes; Also be provided with roller body 91, driving mechanism and cam of injection pump 92 in the inner chamber of the pump housing 1, when roller body 91 rolls on the basic circle of cam 92, fluid enters the grease chamber of plunger bushing 31, when roller body 91 rolled in the ascent stage of cam 92, the oil liquid pressure of grease chamber raises, and overcomes the preset pressure of oil outlet valve spring 6, backs down outlet valve 42, enter high-pressure oil pipe joint 7, realize the process of once outwards supplying high pressure oil.
The surface of contact of the plunger 32 of Injection Pump and plunger bushing 31 has wear resistant coating in the utility model.When plunger 32 during to-and-fro motion vertically, certainly exists rubbing contact between plunger 32 and the plunger bushing 31 in plunger bushing 31.Can be only plunger wear resistant coating 321 be set at the surface of contact of plunger 32, or only plunger bushing wear resistant coating 311 is set at the surface of contact of plunger bushing 31, obviously, in order to obtain best wear-resisting effect, preferred scheme is for all being provided with wear resistant coating on the surface of contact of the two, as shown in Figure 3 and Figure 4, the inner chamber of plunger bushing 31 shown in Figure 3 all scribbles wear resistant coating.Wear resistant coating is a kind of anti-stick coating with rub resistance power, the thinner thickness of wear resistant coating, and Fig. 3 and Fig. 4 are not actual proportional sizes so that the purpose of observing indicates wear resistant coating; Can be equipped with suitable abrasion-resistant coating material according to the material property of plunger bushing 31 and plunger 32, so that obtain best wear-resisting effect; The wear resistant coating structure realizes on technology easily, can adopt the sticking technology that is coated with of plasma spray technology or chemistry that wear resistant coating is plated on plunger bushing 31 as base material or/and on the surface of contact of plunger 32, all can obtain good abrasion resistance, under plasma spray technology, can obtain the thinner wear resistant coating of thickness.
By the working principle of above-mentioned Injection Pump as can be known, plunger 32 to-and-fro motion in plunger bushing 31, realize the oil-feed and the pump oil of grease chamber, there is reciprocating friction in the inner circle wall of plunger 32 and plunger bushing 31, after in the Injection Pump that this model utility provides wear resistant coating being set, in the high frequency to-and-fro motion process of plunger 32, bear the friction that does relatively reciprocating motion and brought between plunger bushing 31 and the plunger 32 by wear resistant coating always, thereby can reduce the plunger bushing 31 of Injection Pump and the wearing and tearing between the plunger 32 effectively, prolong the working life of Injection Pump; In addition, the thinner thickness of wear resistant coating can be fitted in the surface of contact of plunger bushing 31 inner circle walls or plunger 32 periphery walls preferably, improves the accuracy of the two cooperation.
The lower end of plunger 32 has oil storage tank 322, as shown in Figure 4, can on plunger 32, coat wear resistant coating with the periphery wall on top by oil storage tank 322, the part of oil storage tank below 322 mainly plays the effect of guiding on the plunger 32, the influence of its degree of wear and wearing and tearing is less, need not to be provided with wear resistant coating, thereby reduce the area of wear resistant coating, reduce production cost.
Please refer to Fig. 5, Fig. 6 and Fig. 7, Fig. 5 provides the structural representation of delivery valve matching parts in the another kind of embodiment of dimethyl ether Injection Pump for the utility model; Fig. 6 is the structural representation of outlet valve among Fig. 5; Fig. 7 is the structural representation of delivery valve seat among Fig. 5.
By the working principle of Injection Pump as can be known, reciprocating vertically the keying of outlet valve 42 with control delivery valve seat 41 valve ports, thereby form the process of pressing oil and pump oil, then outlet valve 42 certainly exists reciprocating friction with delivery valve seat 41, at the two surface of contact wear resistant coating is set, can be only set out fuel tap wear resistant coating 421 at the surface of contact of outlet valve 42, or only delivery valve seat wear resistant coating 411 is set at the surface of contact of delivery valve seat 41, obviously, in order to obtain best wear-resisting effect, preferred scheme is for all to be provided with wear resistant coating, as shown in Figure 6 and Figure 7 on the surface of contact of the two, so that the sign wear resistant coating is a purpose, be not actual proportional sizes among the figure yet.Similar with the wear resistant coating on the plunger coupled parts (plunger 32 and plunger bushing 31), can be equipped with suitable abrasion-resistant coating material according to the material property of outlet valve 42 and delivery valve seat 41, so that obtain best wear-resisting effect, and be easy to realize on the technology.Wear resistant coating can reduce the wearing and tearing of the delivery valve matching parts (outlet valve 42 and delivery valve seat 41) that the to-and-fro motion friction caused, and prolongs the working life of Injection Pump; In addition, wear resistant coating can improve the sealing between the delivery valve matching parts, thereby the preset pressure that interior residual pressure of high-pressure oil pipe and outlet valve 42 are backed down all can keep constant, keeps the stability of engine operation.
Please refer to Fig. 8, Fig. 8 is the local enlarged diagram at A position among Fig. 1.
Between the periphery wall of the inner circle wall of the pump housing 1 and plunger bushing 31 at least one perfluor ether cushion rubber 2 can be set all, certainly, this set-up mode also goes for other embodiments.Fluid enters from the filler opening of the pump housing 1, and the oil inlet hole on plunger bushing 31 enters in the grease chamber of plunger bushing 31, in addition, fluid may flow into the gap between the pump housing 1 and the plunger bushing 31, then flow out the pump housing 1 from the top of plunger bushing 31, or flow to the spring chamber that plunger bushing 31 belows are equipped with piston spring 8.Plunger bushing 31 upper ends and the pump housing 1 upper end possess certain sealing usually, then herein, a perfluor ether cushion rubber 2 can only be set between the two, plunger bushing 31 lower ends and the pump housing 1 lower end mainly rely on the O-ring seal sealing, therefore, two perfluor ether cushion rubbers 2 are set, can effectively stop the leakage of dimethyl ether; In addition, because dimethyl ether has stronger corrosivity to common sealing material, perfluor ether is the special seal material of dimethyl ether resistant corrosion, therefore, adopts perfluor ether cushion rubber as seal ring, can avoid the seal ring corrosion failure and the dimethyl ether that causes leaks.
Please refer to Fig. 9, Fig. 9 is the local enlarged diagram at B position among Fig. 1.
Except above-mentioned dimethyl ether Injection Pump, the utility model also provides a kind of dimethyl ether engine fuel oil supply system, comprise the dimethyl ether fuel jar, the dimethyl ether Injection Pump that is connected with the dimethyl ether fuel jar, and the dimethyl ether oil sprayer that is connected with the dimethyl ether Injection Pump, described dimethyl ether Injection Pump is the described dimethyl ether Injection Pump of above-mentioned arbitrary mode of execution.Because above-mentioned dimethyl ether Injection Pump has above-mentioned technique effect, the dimethyl ether engine fuel oil supply system with above-mentioned dimethyl ether Injection Pump also has identical technique effect, does not give unnecessary details at this.
More than a kind of dimethyl ether engine fuel oil supply system provided by the utility model and Injection Pump thereof are described in detail.Used specific case herein principle of the present utility model and mode of execution are set forth, above embodiment's explanation just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (6)
1. dimethyl ether Injection Pump, be provided with plunger (32) in the inner chamber of its pump housing (1) and have the plunger bushing (31) of grease chamber, delivery valve seat (41) with valve port also is set, also be provided with the outlet valve (42) that moves vertically with grease chamber's break-make of controlling described valve port and described plunger bushing (31) in the inner chamber of the described pump housing (1), it is characterized in that the surface of contact of described plunger (32) and described plunger bushing (31) has wear resistant coating.
2. dimethyl ether Injection Pump according to claim 1 is characterized in that, the lower end of described plunger (32) has oil storage tank (322), is positioned at described oil storage tank (322) on the described plunger (32) and has plunger wear resistant coating (321) with the periphery wall on top.
3. dimethyl ether Injection Pump according to claim 1 and 2 is characterized in that, described outlet valve (42) has wear resistant coating with the surface of contact of described delivery valve seat (41).
4. dimethyl ether Injection Pump according to claim 3 is characterized in that, is provided with at least one perfluor ether cushion rubber (2) between the periphery wall of the inner circle wall of the described pump housing (1) and described plunger bushing (31).
5. dimethyl ether Injection Pump according to claim 4, it is characterized in that, described plunger bushing (31) has the upper end cavity, described upper end cavity is mid-described delivery valve seat (41) and high-pressure oil pipe joint (7), and the lower end of the top of described delivery valve seat (31) and high-pressure oil pipe joint (7) joins; Be provided with perfluor ether seal ring (5) between the inner circle wall of the periphery wall of described high-pressure oil pipe joint (7) and described plunger bushing (31) upper end cavity.
6. dimethyl ether engine fuel oil supply system, comprise the dimethyl ether fuel jar, the dimethyl ether Injection Pump that is connected with described dimethyl ether fuel jar, and the dimethyl ether oil sprayer that is connected with described dimethyl ether Injection Pump, it is characterized in that described dimethyl ether Injection Pump is each described dimethyl ether Injection Pump of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200894129U CN202007730U (en) | 2011-03-30 | 2011-03-30 | Fuel feed system of dimethyl ether engine and fuel injection pump thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200894129U CN202007730U (en) | 2011-03-30 | 2011-03-30 | Fuel feed system of dimethyl ether engine and fuel injection pump thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202007730U true CN202007730U (en) | 2011-10-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200894129U Expired - Fee Related CN202007730U (en) | 2011-03-30 | 2011-03-30 | Fuel feed system of dimethyl ether engine and fuel injection pump thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202007730U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182598A (en) * | 2011-03-30 | 2011-09-14 | 潍柴动力股份有限公司 | Dimethyl-ether engine fuel oil supply system and fuel injection pump thereof |
-
2011
- 2011-03-30 CN CN2011200894129U patent/CN202007730U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182598A (en) * | 2011-03-30 | 2011-09-14 | 潍柴动力股份有限公司 | Dimethyl-ether engine fuel oil supply system and fuel injection pump thereof |
| CN102182598B (en) * | 2011-03-30 | 2014-11-05 | 潍柴动力股份有限公司 | Dimethyl-ether engine fuel oil supply system and fuel injection pump thereof |
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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 |
Granted publication date: 20111012 Termination date: 20150330 |
|
| EXPY | Termination of patent right or utility model |