CN203532123U - Drive mechanism of radial plunger fuel feed pump - Google Patents
Drive mechanism of radial plunger fuel feed pump Download PDFInfo
- Publication number
- CN203532123U CN203532123U CN201320595965.0U CN201320595965U CN203532123U CN 203532123 U CN203532123 U CN 203532123U CN 201320595965 U CN201320595965 U CN 201320595965U CN 203532123 U CN203532123 U CN 203532123U
- Authority
- CN
- China
- Prior art keywords
- pump
- plunger
- pump shaft
- oil
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A drive mechanism of a radial plunger fuel feed pump comprises the pump and a pump cover, and is characterized by further comprising a pump shaft and a plunger reset elastic ring, wherein the pump shaft is supported in a first pump shaft supporting hole in the pump and a second pump shaft supporting hole in the pump cover, the outer end of the pump shaft is connected with power, the section, located in a pump shaft drive cavity in the pump, of the pump shaft is sleeved with an eccentric drive ring, the eccentric drive ring is driven by the pump shaft to rotate and is in contact with the end, extending into the pump shaft drive cavity in the pump, of a plunger in a plunger valve unit in the pump, the plunger reset elastic ring is arranged on the outer side of the eccentric drive ring in a sleeved mode, and the end, extending into the pump shaft drive cavity in the pump, of the plunger in the plunger valve unit in the pump is connected with the plunger reset elastic ring in the pump. The drive mechanism can bear larger pump end pressure, an oil pump can generate high-pressure fuel with the pressure more than 250MPa, fatigue wear between operating parts can be reduced, and service life of the parts is prolonged.
Description
Technical field
The utility model relates to a kind of radial plunger high-pressure fuel-feed pump driving mechanism used of diesel engine, particularly a kind of high-pressure fuel-feed pump driving mechanism used that is applied to high pressure common rail fuel injection system.
Background technique
Electrocontrolled high-pressure common rail fuel injection system, meets the optimal selection of state three, state four or more maximum discharge standard as diesel engine, high-pressure fuel-feed pump, high pressure oil rail, electric-controlled fuel injector, ECU and sensor, consist of.In this system, the major function of high-pressure fuel-feed pump is periodically to high pressure oil rail, to provide enough fuel oils, to guarantee the stability of fuel pressure in high pressure oil rail.Its fuel feeding moment and fuel delivery size are controlled by ECU.By Der Grundsatz der Maschinen, high-pressure fuel-feed pump has plunger pump in upright arrangement and two kinds of patterns of radial rotor pump; Press control principle, have the oil-feed of the low pressure of control and control the fuel-displaced two kinds of patterns of high pressure.
Chinese utility model patent publication number CN102003319 discloses a kind of high-pressure fuel-feed pump for high-pressure common-rail fuel system, and it is plunger pump in upright arrangement, and control principle is that control high pressure is fuel-displaced.It comprises the pump housing, some pumps oil unit and pump oil unit drives parts, pump oil unit comprises valve body and is radially arranged on the solenoid valve on valve body top and is axially arranged on the one-way valve on valve body top, the outlet of described one-way valve by high-pressure oil pipe together rail oil pipe connect; Its second sealing cone of controlling on spool coordinates formation to seal with the first sealing cone on valve body, plunger oilhole be communicated with high-voltage oil cavity and both connecting port between described valve plug portion and described the second block; One-way valve is ball valve, and the portal outlet of the second end of the steel ball in ball valve and fuel oil forms sealing when ball valve is closed.
The high-pressure fuel-feed pump of this model utility can reduce the leakage rate of fuel oil when high pressure significantly, improves the pump oil efficiency of oil feed pump and the working load of reduction electromagnet.Utilize the formed high-pressure fuel-feed pump of this model utility to be mainly used in Medium or severe type diesel engine, but in light-duty diesel engine field, at aspects such as installing space, rotating speed accommodation, cost of production and working services, it does not possess superiority, thereby has limited the application of this kind of high pressure oil pump in this field.As the radial plunger pump of controlling low pressure oil-feed mode, its compact structure, boundary dimension is little, can be arranged in light-duty diesel engine easily.Under high rotating speed, the fuel feeding efficiency of oil feed pump is higher.Meanwhile, because its plunger diameter, cam lift and pressure angle are all relatively little, can bear higher pump oil pressure, so radial plunger oil feed pump can produce the high pressure fuel that is greater than 250MPa.
Model utility content
Technical problem to be solved in the utility model: be not all suitable for the narrow limitation of light-duty diesel engine at aspects such as installing space, rotating speed accommodation, cost of production and working services for existing plunger high-pressure fuel-feed pump in upright arrangement, and provide a kind of radial plunger oil feed pump driving mechanism used of controlling low pressure oil-feed mode, this radial plunger oil feed pump compact structure, boundary dimension is little, can be arranged in light-duty diesel engine easily.Under high rotating speed, the fuel feeding efficiency of oil feed pump is higher.Meanwhile, because its plunger diameter, cam lift and pressure angle are all relatively little, can bear higher pump oil pressure, so can produce by the formed radial plunger oil feed pump of this model utility the high pressure fuel that is greater than 250MPa.
Technical problem to be solved in the utility model can be achieved through the following technical solutions:
The driving mechanism that radial plunger oil feed pump is used, comprises the pump housing and pump cover, it is characterized in that, also comprises:
One is supported on the first pump shaft supported hole in the described pump housing and the pump shaft in the second pump shaft supported hole in pump cover, the outer end of this pump shaft connects with power, this section of cover that described pump shaft is positioned at the pump shaft actuator chamber of the described pump housing has an eccentric drive ring, this eccentric drive ring be subject to the driving of pump shaft and turn round and with the described pump housing in plunger valve unit in plunger extend into the end in contact in the pump shaft actuator chamber in the described pump housing;
One is enclosed within the plunger return elastic ring outside described eccentric drive ring, and one end that the plunger in the plunger valve unit in the described pump housing extends in the pump shaft actuator chamber in the described pump housing is connected with the plunger return elastic ring in the described pump housing.
In a preferred embodiment of the present utility model, described eccentric drive ring is arranged on described pump shaft by a pressure lubrication axle sleeve; In the described pump housing, be provided with an oilhole and a lubricant charging is chewed mounting hole, the inner of described oilhole is communicated with described pump shaft actuator chamber, the outer end of described oilhole is chewed mounting hole with described lubricant charging and is connected, and at described lubricant charging, chews and in mounting hole, lubricant charging is installed and chews.
In a preferred embodiment of the present utility model, described pump shaft is supported on respectively in the first pump shaft supported hole and the second pump shaft supported hole in the pump housing by two sliding bearings, between described pump shaft and pump cover, be provided with dust-proof seal ring, described dust-proof seal ring is positioned at the outside of the first pump shaft supported hole of the described pump housing.
In a preferred embodiment of the present utility model, the outer ring surface of described eccentric drive ring is cydariform outer ring surface.
In a preferred embodiment of the present utility model, there is certain offset distance in the center of the cydariform outer ring surface of described eccentric drive ring and described eccentric drive Huan center.
In a preferred embodiment of the present utility model, described plunger return elastic ring is cross-linked and is formed by some sections of flat segments and some sections of arcuate segments, and the plunger in the plunger valve unit in its middle pump body extends in pump shaft actuator chamber in the described pump housing with one section of flat segments on plunger return elastic ring in the described pump housing and is connected.
In a preferred embodiment of the present utility model, a wear ring is installed on the surface of contact of described pump cover and the pump housing, the eccentric drive loop contacts in described wear ring and the described pump housing.
Owing to having adopted technological scheme as above, high-pressure fuel-feed pump of the present utility model possesses following advantage:
1, the contact stress very little (<1200N/mm^2) producing when work between the inner end of the plunger in each plunger valve unit and eccentric drive ring, so can bear higher pump end pressure, oil pump can produce the high pressure fuel that is greater than 250MPa.
2, pump shaft and eccentric drive ring, eccentric drive ring and plunger and the point of contact each other such as plunger and plunger compartment are changing in pump oil process always, so can reduce the fatigue wear between each moving parts, improve its operating life.
3, due to the backhaul of plunger, abandoned traditional dynamic compression spring mechanism and adopted plunger return elastic ring, required installing space is less, thereby makes oil pump volume little, is more suitable in using in light-duty diesel engine.
Accompanying drawing explanation
Fig. 1 is for being used high-pressure common-rail fuel system work schematic diagram of the present utility model.
The working state schematic representation of Fig. 2 when using in radial plunger oil feed pump of the present utility model a plunger valve unit fuel feeding.
Fig. 3 is working state schematic representation when another plunger valve unit is closed in use radial plunger oil feed pump of the present utility model.
Fig. 4 is the A-A sectional view of Fig. 3.
Fig. 5 is for being used the pump shaft structure schematic diagram of the utility model high-pressure fuel-feed pump.
Fig. 6 is the A-A sectional view of Fig. 5.
Fig. 7 is for being used the eccentric drive ring structure schematic diagram in radial plunger oil feed pump of the present utility model.
Fig. 8 is for being used the ram lift curve synoptic diagram of three plunger valve unit in the utility model radial plunger oil feed pump.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.
Referring to Fig. 1, this figure is the structural representation of high pressure common rail fuel injection system.System mainly comprises: the component such as radial plunger oil feed pump 100, common rail pipe 6, oil sprayer 7, ECU4 and wire harness 5.The working principle of system is: oil transfer pump 2 is inhaled fuel oil to deliver to metering valve 3 with certain pressure from engine oil tank 1 by vacuum adsorption principle, and metering valve 3 is determined its aperture by the given control electric current of ECU4, thereby controls the size of oil inlet quantity.The fuel oil process that enters into the plunger compartment of radial plunger oil feed pump 100 enters into common rail pipe 6 from oil pump pressurization by high-pressure oil pipe 7.Fuel oil in common rail pipe 6 is controlled by ECU4, is injected to the firing chamber of motor via oil sprayer 8 with certain flow.In system, the supply of fuel oil, the monitoring of pressure, the oil spout moment and fuel injection quantity size are controlled by ECU4.
Referring to Fig. 2 to Fig. 4, the radial plunger oil feed pump shown in figure comprises the pump housing 110, pump cover 120, three plunger valve unit 140 and three high-pressure oil pipe joints 130.
The pump shaft supported hole 111 and the pump shaft actuator chamber 112 that in the pump housing 110, are coaxially arranged with and mutually connect; Three plunger valve unit 140 are radially arranged in the pump housing 110 in uniform way centered by the common axis line 113 of pump shaft supported hole 111 and pump shaft actuator chamber 112.
Each plunger valve unit 140 is coaxially arranged in the pump housing and the plunger hole 141, plunger compartment 142 and the oil-feed valve seat installation cavity 143 that mutually connect, wherein the inner of plunger hole 141 and pump shaft actuator chamber 112 connect, the outer end of plunger hole 141 is communicated with the inner of plunger compartment 142, and the outer end of plunger compartment 142 is communicated with the inner of oil-feed valve seat installation cavity 143.
The outlet end of the oil inlet hole 144 of each plunger valve unit 140 and oil-feed valve seat installation cavity 143 connects, and the common axis line 146 of the axis of this oil inlet hole 144 and plunger hole 141, plunger compartment 142 and oil-feed valve seat installation cavity 143 is mutual vertical and be parallel to each other with the common axis line 113 of pump shaft supported hole 111 and pump shaft actuator chamber 112.
The inner of oil outlet 145 in each plunger valve unit 140 is communicated with plunger compartment 142; The common axis line 146 of the axis of this oil outlet 145 and plunger hole 141, plunger compartment 142 and oil-feed valve seat installation cavity 143 is mutually vertical and be parallel to each other with the common axis line 113 of pump shaft supported hole 111 and pump shaft actuator chamber 112.
In the plunger hole 141 of plunger 147 slide arrangement in each plunger valve unit 140 in this plunger valve unit 140, the inner of this plunger 147 extends in pump shaft actuator chamber 112, and the outer end of plunger 147 extends in this 140Zhong plunger compartment, plunger valve unit 142.
Oil-feed valve seat 148 in each plunger valve unit 140 is arranged in oil-feed valve seat installation cavity 143 by oil-feed valve seat gland 149, forms sealing between the interior edge face of oil-feed valve seat 148 and oil-feed valve seat installation cavity 143.Between oil-feed valve seat gland 149 and oil-feed valve seat installation cavity 143, seal ring 149a is set simultaneously.
At oil-feed valve seat 148 center, offer a spool bore 148a, in this oil-feed valve seat 148, be provided with a radial direction oil hole 148b, the outer circumferential face of oil-feed valve seat 148 has at least the external diameter of a section to be less than the internal diameter of oil-feed valve seat installation cavity 143, to form an annular oil suction chamber 148c between oil-feed valve seat 148 and the inner cavity surface of oil-feed valve seat installation cavity 143, this annular oil suction chamber 148c and oil inlet hole 144 and radial direction oil hole 148b connect Dan Buyu plunger compartment 142 and connect, and radial direction oil hole 148b also connects with spool bore 148a in addition; On the interior edge face of oil-feed valve seat 148, be provided with the seal ring conical surface 148d coaxial with spool bore 148a; Spool bore 148a is 142 perforations in opening state Xia Yu plunger compartment.
Spool 140a in each plunger valve unit 140 is positioned at spool bore 148a, the inner of this spool 140a be provided with one with oil-feed valve seat 148 interior edge faces on the seal ring conical surface 148d seal ring conical surface 140a1 that cooperatively interacts and seal.In the upper end of spool 140a, dispose in addition a flange 140a2.
It is upper that spool return spring 140b in each plunger valve unit 140 is enclosed within corresponding spool 140a, and the upper end of this spool return spring 140b contacts with the flange 140a2 on spool 140a, and lower end contacts with the exterior edge face of oil-feed valve seat 148.Like this under the effect of spool return spring 140b, spool 140a can move up, seal ring conical surface 148d on seal ring conical surface 140a1 on spool 140a the inner and oil-feed valve seat 148 interior edge faces cooperatively interacts and seals, and makes this plunger valve unit 140 fuel cut-offs.
On the pump housing 110, corresponding to oil outlet 145 positions in three plunger valve unit 140, respectively offer a high-pressure oil pipe joint ladder mounting hole 131, in high-pressure oil pipe joint ladder mounting hole 131, be minor diameter unthreaded hole 131a, outer is major diameter screw 131b, the inner of minor diameter unthreaded hole 131a is communicated with the oil outlet 145 in corresponding plunger valve unit 140, and the intermediate portion of high-pressure oil pipe joint 130 is arranged in major diameter screw 131b.
The outer end of this high-pressure oil pipe joint 130 is connected to high pressure oil rail by high-pressure oil pipe, the inner extend in the minor diameter unthreaded hole 131a of high-pressure oil pipe joint ladder mounting hole 131 and and the minor diameter unthreaded hole 131a of high-pressure oil pipe joint ladder mounting hole 131 between leave one and form the gap that oil pocket 131c.
In high-pressure oil pipe joint 130, be provided with oil outlet 132, wherein the inner of oil outlet 132 with go out oil pocket 131c and be communicated with, outer end is stated high-pressure oil pipe and is communicated with.
In the minor diameter unthreaded hole 131a of each high-pressure oil pipe joint ladder mounting hole 131, an one-way valve member 150 is installed, this one-way valve member 150 comprises steel ball 151 and steel ball return spring 152, steel ball return spring 152 outer ends are enclosed within on the inner of high-pressure oil pipe joint 130, and the inner of steel ball return spring 152 is pressed in steel ball 151 in the outlet of oil outlet 145 of corresponding plunger valve unit 140.For with steel ball 51 fitted seal, the outlet of the oil outlet 145 of plunger valve unit 140 is designed to the inner conical surface suitable with steel ball 151.
When plunger 147 outwards moves, the oil pressure in plunger compartment 142 is raise, after overcoming the resistance of steel ball return spring 152, steel ball 151 is backed down from the outlet port of the oil outlet 145 of plunger valve unit 140, realize fuel feeding.
At pump cover 120 center, offer pump shaft supported hole 122, in order to guarantee that the axis of pump shaft supported hole 122 overlaps with the common axis line 113 of pump shaft supported hole 111 and pump shaft actuator chamber 112, on the surface of contact 114 of the pump housing 110 and pump cover 120, be provided with an outside outstanding centering ring 114a, and offer a centering ring groove 123a on the surface of contact 123 of pump cover 120 and the pump housing 110, when pump cover 120 is installed on the pump housing 110, centering ring 114a inserts in centering chute 123a.In order to seal, between centering ring 161 and centering annular groove 123a, be provided with seal element 123b.
The outer end of this pump shaft 160 connects with power, rely on outer power drive to rotate, this section that pump shaft 160 is positioned at pump shaft actuator chamber 112 is provided with an eccentric drive ring 165 by a pressure lubrication axle sleeve 166, and this eccentric drive ring 165 is subject to the driving of pump shaft 160 and turns round.Tightly fit in the end, one end that plunger 147 in this eccentric drive ring 165 and three plunger valve unit 140 extends in pump shaft actuator chamber 112, eccentric drive ring 165 is followed in pump shaft 160 rotation processes, and three plungers 147 in plunger valve unit 140 are moved back and forth in plunger hole 141.
Referring to Fig. 7, the outer ring surface of eccentric drive ring 165 is cydariform outer ring surface 165a, and the size of the radius R of cydariform outer ring surface 165a is meter level unit, and the center O 2 of its center O1 and eccentric drive ring 165 exists certain offset distance D, and offset distance D is 1～1.5mm.This design, can reduce eccentric drive ring 165 on the one hand and plunger 147 extends into the contact stress between the end, one end in pump shaft actuator chamber 112, improves the reliability of motion, thereby can bear larger pump oil pressure; Can make the motion mode of plunger 147 change simultaneously,, plunger 147 is except the axis automatic reciprocating motion along plunger hole 141, can also be around the axis automatic rotating of plunger 147 self, and can avoid the cylindrical of plunger 147 and end to exist and repeat stressed and repeated wear.
In order to improve the working life of plunger 147, the active section of plunger 147 is polished rod structure, on the active section outer circumferential face of plunger 147 and exterior edge face, is coated with one deck alloy layer.
When making a plunger in three plunger valve unit 140 147 pumps oil, another plunger 147 is got back to lower dead center, at eccentric drive ring 165 overcoats, there is a plunger return elastic ring 170, this plunger return elastic ring 170 is cross-linked and is formed by three sections of flat segments 171 and three sections of arcuate segments 172, and one end that wherein plunger 147 in each plunger valve unit 140 extends in pump shaft actuator chamber 112 is connected with one section of flat segments 171 on plunger return elastic ring 170.The rigidity of plunger return elastic ring 170 must enough reduce plunger 147 impact to eccentric drive ring 165 in to-and-fro motion process.Referring to Fig. 4, along pump shaft 120 directions, see, between the parallel lines 124 of the common axis line 146 of plunger hole 141, plunger compartment 142 and oil-feed valve seat installation cavity 143 and excessively pump shaft 120 center O 3, there is certain offset distance X.Offset distance X is 1.5～1.8mm.Like this, plunger 147 in each plunger valve unit 140 is in plunger hole 141 separately, in oil-feed and fuel-displaced process, the free to-and-fro motion of common axis line 146 along plunger hole 141, plunger compartment 142 and oil-feed valve seat installation cavity 143, simultaneously the axis around himself freely rotates, and extends into the unbalanced power of the cydariform outer ring surface 165a appearance of end, one end 147a in pump shaft actuator chamber 112 and eccentric drive ring 165 to offset plunger 147.
Referring to Fig. 5 and Fig. 6, the center O 4 of pump shaft 160 has certain throw of eccentric L with the center O 5 of eccentric drive ring 165, and throw of eccentric L according to engine power is big or small, determine by required fuel delivery per cycle.Pump shaft 160 rotates a circle, and once, the size of its lift is the twice of throw of eccentric L, i.e. 2L to the corresponding to-and-fro motion of plunger 147 in each plunger valve unit 140.Referring to Fig. 8, this figure is the lifting curve of three plungers 147 in plunger valve unit 140, and lifting curve is cosine function curve, and pump shaft 120 rotates a circle, and once, phase phase difference is 120 degree to the plunger 147 difference to-and-fro motion in three plunger valve unit 140 separately.
In order to limit the axial position of eccentric drive ring 165, on the surface of contact 123 of pump cover 120 and the pump housing 110, by fastening piece, one wear ring 167 is installed, the end contact of this wear ring 167 and eccentric drive ring 165.
In order to give the interior injection lubricant oil of pump shaft actuator chamber 112, pressure lubrication axle sleeve 166 is lubricated, in the pump housing 110, be provided with an oilhole 181 and a lubricant charging and chew mounting hole 182, the inner of oilhole 181 is communicated with pump shaft actuator chamber 112, the outer end of oilhole 181 is chewed mounting hole 182 with lubricant charging and is communicated with, and in lubricant charging is chewed mounting hole 182, lubricant charging is installed and chews 183.
Referring to Fig. 2, the plunger 147 in each plunger valve unit 140 is under the drive of eccentric drive ring 165, and descending by atdc when its operation, it is large that the volume in plunger compartment 142 becomes, pressure drop.Fuel pressure in the radial direction oil hole 148b of oil-feed valve seat 148 acts on the seal ring conical surface 140a1 of spool 140a, promote spool 140a at the precompression that overcomes spool return spring 140b, the seal ring conical surface 140a1 of spool 140a and the seal ring conical surface 148d of oil-feed valve seat 148 are departed from.Fuel oil after metering enters in plunger compartment 141 from the gap between the seal ring conical surface 140a1 of spool 140a and the seal ring conical surface 148d of oil-feed valve seat 148.Now, steel ball 151, under the effect of steel ball return spring 152 and back pressure, is fitted on the inner conical surface of oil outlet 145 tightly, in case the fuel flow returns in common rail pipe is in plunger compartment 141.When plunger 147 runs to lower dead center, oil-feed stroke finishes.
Referring to Fig. 3, plunger 147 is under the drive of eccentric drive ring 165, and when its operation is by up after bottom dead center, plunger compartment's 141 volumes diminish, and it is large that pressure becomes gradually.Spool 140a is under the effect of plunger compartment's 142 pressure and spool return spring 140b, the fuel oil back pressure active force overcoming in the radial direction oil hole 148b of oil-feed valve seat 148 is up, make the seal ring conical surface 140a1 of spool 140a and the seal ring conical surface 148d of oil-feed valve seat 148 engage sealing, prevent that the high pressure fuel of plunger compartment 142 from entering in the radial direction oil hole 148b and annular oil suction chamber 148c of oil-feed valve seat 148 by spool bore 148a.Along with the continuation of plunger 147 is up, fuel pressure in plunger compartment 142 is elevated to be enough to overcome when steel ball return spring 152 and back pressure and acting on the pressure on steel ball 151, and the high pressure fuel in plunger compartment 142 enters into common rail pipe by the oil outlet 132 in oil outlet 145 and high-pressure oil pipe joint 130.When plunger 141 runs to top dead center, force feed stroke finishes.
How many amount of fuel that each plunger valve unit 140 pumps is controlled by metering valve.Metering valve is arranged on pump cover 120.Metering valve is the flow proportional formula with a lot of circulation areas hole, or pressure proportional formula control valve, by ECU(electronic control unit) drive.ECU realizes closed loop control by the pressure detecting in common rail pipe: when the fuel pressure in common rail pipe is less than the goal pressure of ECU setting, ECU adjusts the driving current size that drives metering valve automatically, to increase, by metering valve, enter the fuel quantity in plunger compartment, the fuel oil that the every circulation of plunger is pumped increases thereupon, thereby reaches the object that improves fuel pressure in common rail pipe.Vice versa.
More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model has appending claims and equivalent thereof to define.
Claims (7)
1. a radial plunger oil feed pump driving mechanism used, comprises the pump housing and pump cover, it is characterized in that, also comprises:
One is supported on the first pump shaft supported hole in the described pump housing and the pump shaft in the second pump shaft supported hole in pump cover, the outer end of this pump shaft connects with power, this section of cover that described pump shaft is positioned at the pump shaft actuator chamber of the described pump housing has an eccentric drive ring, this eccentric drive ring be subject to the driving of pump shaft and turn round and with the described pump housing in plunger valve unit in plunger extend into the end in contact in the pump shaft actuator chamber in the described pump housing;
One is enclosed within the plunger return elastic ring outside described eccentric drive ring, and one end that the plunger in the plunger valve unit in the described pump housing extends in the pump shaft actuator chamber in the described pump housing is connected with the plunger return elastic ring in the described pump housing.
2. radial plunger oil feed pump as claimed in claim 1 driving mechanism used, is characterized in that, described eccentric drive ring is arranged on described pump shaft by a pressure lubrication axle sleeve; In the described pump housing, be provided with an oilhole and a lubricant charging is chewed mounting hole, the inner of described oilhole is communicated with described pump shaft actuator chamber, the outer end of described oilhole is chewed mounting hole with described lubricant charging and is connected, and at described lubricant charging, chews and in mounting hole, lubricant charging is installed and chews.
3. radial plunger oil feed pump as claimed in claim 1 driving mechanism used, it is characterized in that, described pump shaft is supported on respectively in the first pump shaft supported hole and the second pump shaft supported hole in the pump housing by two sliding bearings, between described pump shaft and pump cover, be provided with dust-proof seal ring, described dust-proof seal ring is positioned at the outside of the first pump shaft supported hole of the described pump housing.
4. radial plunger oil feed pump as claimed in claim 1 driving mechanism used, is characterized in that, the outer ring surface of described eccentric drive ring is cydariform outer ring surface.
5. radial plunger oil feed pump as claimed in claim 4 driving mechanism used, is characterized in that, the center of the cydariform outer ring surface of described eccentric drive ring and described eccentric drive Huan center exist certain offset distance.
6. radial plunger oil feed pump as claimed in claim 1 driving mechanism used, it is characterized in that, described plunger return elastic ring is cross-linked and is formed by some sections of flat segments and some sections of arcuate segments, and the plunger in the plunger valve unit in its middle pump body extends in pump shaft actuator chamber in the described pump housing with one section of flat segments on plunger return elastic ring in the described pump housing and is connected.
7. radial plunger oil feed pump as claimed in claim 1 driving mechanism used, is characterized in that, a wear ring is installed on the surface of contact of described pump cover and the pump housing, the eccentric drive loop contacts in described wear ring and the described pump housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320595965.0U CN203532123U (en) | 2013-09-26 | 2013-09-26 | Drive mechanism of radial plunger fuel feed pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320595965.0U CN203532123U (en) | 2013-09-26 | 2013-09-26 | Drive mechanism of radial plunger fuel feed pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203532123U true CN203532123U (en) | 2014-04-09 |
Family
ID=50418338
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320595965.0U Expired - Fee Related CN203532123U (en) | 2013-09-26 | 2013-09-26 | Drive mechanism of radial plunger fuel feed pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203532123U (en) |
-
2013
- 2013-09-26 CN CN201320595965.0U patent/CN203532123U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9074474B2 (en) | Pump, in particular a high-pressure fuel pump | |
| CN100348859C (en) | Safety fuel injection pump | |
| CN103089507B (en) | Double-row six-cylinder radial type common-rail oil feed pump | |
| CN206035700U (en) | A single cylinder high pressure common rail firewood fuel pump assembly for rail system | |
| CN107975445A (en) | A kind of CF common rail systems | |
| CN104612962B (en) | Variable-displacement piston oil delivery pump and variable-flow low-pressure oil supplying device | |
| CN103470416A (en) | Radial plunger piston oil supplying pump applied to high-pressure common-rail fuel oil injection system | |
| CN102003319B (en) | High-pressure fuel feed pump for high-pressure common-rail fuel injection system | |
| CN108425776B (en) | Common rail oil feed pump with oil inlet control function | |
| CN201354718Y (en) | Multi-cylinder radial plunger pump | |
| CN104389709B (en) | High-pressure fuel feed pump for high-pressure common rail fuel injection system | |
| CN203452954U (en) | Radial plunger oil feeding pump applied to high-pressure common-rail fuel injection system | |
| CN203452958U (en) | Oil pumping part for radial plunger piston oil feeding pump | |
| CN102654093B (en) | Pumping head | |
| CN102287270B (en) | Constant high pressure injection system for diesel fuel | |
| CN203452956U (en) | Plunger piston for radial plunger piston oil feeding pump | |
| CN104061099A (en) | Energy-saving engine fuel injection pump plunger | |
| CN203532123U (en) | Drive mechanism of radial plunger fuel feed pump | |
| CN203452955U (en) | Plunger piston returning mechanism for radial plunger piston oil feeding pump | |
| CN203452957U (en) | Driving ring for radial plunger piston oil feeding pump | |
| CN203452953U (en) | Driving shaft for radial plunger piston oil feeding pump | |
| CN104329198B (en) | A kind of in-line arrangement co-rail fuel feed pump controlling low pressure oil-feed | |
| CN201851247U (en) | High-pressure fuel feed pump used for high-pressure common-rail fuel injection system | |
| CN203962260U (en) | Energy-saving injection pump of engine plunger | |
| CN201818411U (en) | Fuel injection pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 421007 Hunan city in Hengyang Province, Yanfeng District Baishazhou box No. 10 Patentee after: The electronic (Hengyang) industrial technology Limited by Share Ltd Address before: 421007 Hunan city in Hengyang Province, Yanfeng District Baishazhou box No. 10 Patentee before: Nanyue Electronic Control (Hengyang) Industry Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140409 Termination date: 20190926 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |