CN102678541B - Fuel delivery pump with floated cycloid rotor - Google Patents
Fuel delivery pump with floated cycloid rotor Download PDFInfo
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- CN102678541B CN102678541B CN201210167476.5A CN201210167476A CN102678541B CN 102678541 B CN102678541 B CN 102678541B CN 201210167476 A CN201210167476 A CN 201210167476A CN 102678541 B CN102678541 B CN 102678541B
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- 239000000446 fuel Substances 0.000 title claims abstract description 81
- 238000000034 method Methods 0.000 claims description 13
- 230000001936 parietal effect Effects 0.000 claims description 9
- 238000004663 powder metallurgy Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims 1
- 238000002347 injection Methods 0.000 abstract description 7
- 239000007924 injection Substances 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 74
- 239000000295 fuel oil Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of auto parts, and relates to a fuel delivery pump with a floated cycloid rotor. The fuel delivery pump with the suspended cycloid rotor comprises a fuel delivery pump body, an outer rotor, an inner rotor and a universal joint. The fuel delivery pump body is in an integral structure. A transverse guide groove is reserved on the bottom surface of a pump inner cavity between the upper portion of a right wall of a low pressure oil cavity and the inner wall of the pump inner cavity. Seven axial through grooves on the outer wall of the outer rotor are distributed at central radial positions of inner wall tooth sections of the outer rotor. When the inner rotor and the outer rotor rotate, fuel flows along the transverse guide groove and the axial through grooves to positions to be lubricated. An oil film is formed between the outer wall of the outer rotor and the inner wall of the pump inner cavity, the outer rotor cannot be contacted with the fuel delivery pump directly under the action of liquid surface tension, the outer rotor is floated in the fuel delivery pump body, and accordingly friction between the outer rotor and the fuel delivery pump body is avoided, and the service life of the fuel delivery pump is prolonged. The fuel delivery pump with the suspended cycloid rotor is stable in operation, low in pulsating, low in noise and high in volume efficiency, and is applicable to automotive diesel engine fuel injection systems.
Description
Technical field
The invention belongs to technical field of automobile parts, particularly a kind of floated cycloid rotor oil transfer pump.
Background technique
When automotive Diesel engine ubiquity low temperature low speed, start the problem for shortage of oil, can not be suitable for the needs of high-pressure fuel oil system, the oil transfer pump of the mechanical type injection system adopting at present, comprise vane pump, gear pump and plunger pump, all exist pressure and flow pulse large, noise is high, and volumetric efficiency is low, the defects such as low speed oil absorption is poor, cause the discharge of domestic automobile diesel engine not reach even Europe IV, the Europe V standard of Europe III of international requirement.
In diesel engine high pressure co-rail system, should ensure that in order to meet fuel oil circulates in low pressure oil way system, again can be by the fuel delivery of enough flows and certain pressure to high-pressure fuel supply system, cycloid rotor pump is the pattern of extensively being praised highly in low-voltage high speed pump field in recent years.In early days because inner and outer rotors needs expensive rotor grinding machine difficult processing to be promoted.But along with the development of domestic means of a powder metallurgy technique, manufacturing process is resolved, domestic oil pump industry has also almost all adopted cycloid rotor pump on monoblock pump, but the cycloid rotor pump serious wear of prior art, working life is short.Main cause is, because internal rotor is assemblied on the eccentric shaft of the pump housing, and external rotor is to rotate under the driving of internal rotor, high pressure oil is at the mutual rotary course of inner and outer rotors, volume between inner and outer rotors to be produced reducing, and can produce reaction force to inner and outer rotors at this process mesohigh oil, internal rotor is inwardly relatively moved, and external rotor outwards relatively moves, and act on the power of external rotor can be larger.Because the radial clearance of external rotor and the pump housing is very little, be not easy to produce oil film, so in High Rotation Speed process between external rotor and the pump housing friction very serious, even can on the pump housing, produce burr, make external rotor and pump housing locking, result is scrapped oil transfer pump.Therefore need one simple in structure, noise is low, and plot ratio is large, avoids the long lifetime cycloid rotor oil transfer pump of direct contact friction between external rotor and the pump housing.
Summary of the invention
The object of the invention is to solve one described in background technique simple in structure, noise is low, plot ratio is large, the cycloid rotor oil transfer pump problem of long service life, a kind of floated cycloid rotor oil transfer pump is provided, floated cycloid rotor oil transfer pump is by fuel supply pump housing 1, external rotor 2, internal rotor 3 and crossed joint 4 form, external rotor 2 is placed in the pump housing inner chamber 101 of fuel supply pump housing 1, internal rotor 3 is rotationally connected with the inner rotor shaft 102 of fuel supply pump housing 1 in external rotor 2, crossed joint 4 is placed in the crossed joint mounting groove 303 of internal rotor 3, it is characterized in that, fuel supply pump housing 1 is structure as a whole, in circular pump housing inner chamber 101, inner rotor shaft 102 is with on the eccentric also vertical bottom surface that is placed in pump housing inner chamber 101 of pump housing inner chamber 101, the center of circle of pump housing inner chamber 101 bottom surfaces is O
1, the center of circle of inner rotor shaft 102 on pump housing inner chamber 101 bottom surfaces is O
2, pass through O
2pump housing inner chamber 101 bottom surface radius O
1the length of A is r, O
2depart from O
1distance be d, with pump housing inner chamber 101 bottom surface radius O
1a is symmetry axis, and 2 half-moon-shaped grooves are symmetrically placed on pump housing inner chamber 101 bottom surfaces, radius O
1the groove in A left side is high-voltage oil cavity 104, the groove on right side is low pressure oil pocket 103, oil inlet hole 105 is built in the lower end of low pressure oil pocket 103 bottom surfaces at low pressure oil pocket 103, oil inlet hole 105 is for penetrating the circular hole of fuel supply pump housing 1 bottom, fuel inlet fitting parts 110 are placed in the back side of fuel supply pump housing 1, the intracavity bottom of fuel inlet fitting parts 110 is communicated with oil inlet hole 105, the internal chamber wall of fuel inlet fitting parts 110 is worm structure, the seal groove 109 of ring is placed on fuel supply pump housing 1 front surface, 3 fixed holes 108 are spacedly distributed on fuel supply pump housing 1 by Rotational Symmetry, on pump housing inner chamber 101 bottom surfaces, there is a circular groove 106 along the cylndrical surface inwall of pump housing inner chamber 101, between the top of low pressure oil pocket 103 right side walls and the cylndrical surface inwall of pump housing inner chamber 101, on the bottom surface of pump housing inner chamber 101, there is a transverse channels 107,
The structure of described external rotor 2 is, external rotor outer wall 201 is cylndrical surface, external rotor outer wall 201 is Spielpassung with the inwall of pump housing inner chamber 101, external rotor inwall is rotational symmetric seven lobe profile of tooth cylinders, on external rotor inwall, there are 7 to parietal tooth lobe 203 in projecting inward external rotor, on external rotor outer wall 201, there are 202,7 axial through slots 202 of 7 axial through slots to be distributed in interior parietal tooth lobe 203 center-diameters of each external rotor to corresponding position;
The structure of described internal rotor 3 is, internal rotor outer wall 301 is rotational symmetric six lobe profile of tooth cylinders, and the center of internal rotor 3 is circular internal rotor axis hole 302, the crossed joint mounting groove 303 of cydariform and the concentric front that is placed in internal rotor 3 of internal rotor axis hole 302; The crossed joint 4 of cydariform is placed in the crossed joint mounting groove 303 of internal rotor 3, and the camshaft attachment hole 401 of crossed joint 4 by the center together camshaft 5 of rail pump connects;
In external rotor 2, internal rotor 3 and external rotor 2 are eccentric mutually, in the pump housing inner chamber 101 of fuel supply pump housing 1, external rotor 2 and internal rotor 3 form the internally meshed rotor of a pair of bias as the operation element that produces oil pressure, and the front surface of external rotor 2 and internal rotor 3 is lower than fuel supply pump housing 1 front surface 0.03mm～0.07mm;
Oil transfer pump is in the time of work, and under the driving of camshaft 5, internal rotor 3 is power rotor, and external rotor 2 is driven rotor, and internal rotor 3 and external rotor 2 turn clockwise in the same way, between internal rotor outer wall 301 and external rotor inwall, intermesh by tooth lobe.
The width of described circular groove 106 is 0.8～1.2mm, and the degree of depth is 0.4～0.6mm;
The width of described transverse channels 107 is 0.7～1.2mm, and the degree of depth is 0.4～0.6mm;
The width of described axial through slot 202 is 0.7～1.2mm, and the degree of depth is 0.1～0.3mm;
Described O
2depart from O
1distance d be 8～10% of pump housing inner chamber 101 bottom surface radius r;
Described fuel supply pump housing 1, external rotor 2 and internal rotor 3 all adopt means of a powder metallurgy technique processing.
Feature of the present invention is there is a transverse channels 107 on the bottom surface of the pump housing inner chamber 101 between the top of low pressure oil pocket 103 right side walls and pump housing inner chamber 101 inwalls, the radial position corresponding with parietal tooth Ban203 center in each external rotor on external rotor outer wall 201, has an axial through slot 202 on external rotor outer wall 201.The fuel oil that enters fuel supply pump housing 1 low pressure oil pocket 102 flows to the lubricated position of needs smoothly along transverse channels 107 and each axial through slot 202.In the transverse channels 107 limiting in the present invention and the axially width of through slot 202 and the scope of the degree of depth, between external rotor outer wall 201 and pump housing inner chamber 101 inwalls, produce oil film, because of the surface tension effects of liquid, external rotor 2 can directly not contact with fuel supply pump housing 1, external rotor 2 is state of suspension at fuel supply pump housing 1, avoiding both directly to contact produces friction, the working life of having improved oil transfer pump.
Beneficial effect of the present invention is, fuel supply pump housing is structure as a whole, oil inlet hole is placed in pump housing bottom surface, axial fuel inlet, external rotor and internal rotor are the eccentric internal gearing structure of seven lobe profile of tooth cylinders and six lobe profile of tooth cylinders, internal rotor center and external rotor misalignment are little, inner and outer rotors rotating Vortex, between cog forms independently oil pocket, and in working cycle process, the between cog of internal rotor and external rotor keeps intermeshing, has realized simple in structure, noise is low and plot ratio is large requirement to oil transfer pump; The transverse channels arranging on fuel supply pump housing and the axial through slot arranging on external rotor outer wall, avoid external rotor and fuel supply pump housing directly to contact and produced friction, can bring up to about 1000 hours the oil transfer pump working life making from about 500 of prior art hour, and in the situation that cost does not increase, increased by one times working life.Be 178 yuan and need every year 20000 calculating by each oil transfer pump unit price, adopt oil transfer pump of the present invention only to need 10,000, can economize on the use of funds 1780000 yuan, will produce huge economic benefit.
Brief description of the drawings
Fig. 1 is floated cycloid rotor oil transfer pump structural representation;
Fig. 2 is fuel supply pump housing plan view;
Fig. 3 is B-B place sectional view in Fig. 3;
Fig. 4 is external rotor plan view;
Fig. 5 is C-C place sectional drawing in Fig. 4;
Fig. 6 is internal rotor plan view;
Fig. 7 is crossed joint plan view;
Fig. 8 is the scheme of installation of floated cycloid rotor oil transfer pump for high pressure common rail fuel injection system.
In figure, 1--fuel supply pump housing, 2--external rotor, 3--internal rotor, 4--crossed joint, 5--camshaft, 6--is the rail pump housing altogether, 7--oil transfer pump fastening screw trip bolt, 8--low pressure fuel pipe tee union, 9--O type circle, 101--pump housing inner chamber, 102--inner rotor shaft, 103--low pressure oil pocket, 104--high-voltage oil cavity, 105--oil inlet hole, 106--circular groove, 107--transverse channels, 108--fixed hole, 109--seal groove, 110--fuel inlet fitting parts, 201--external rotor outer wall, the axial through slot of 202--, parietal tooth lobe in 203--external rotor, 301--internal rotor outer wall, 302--internal rotor axis hole, 303--crossed joint mounting groove, 401--camshaft attachment hole.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is further illustrated.
Fig. 1 is the cycloid oil transfer pump example structure schematic diagram in high pressure common rail fuel injection system, cycloid oil transfer pump in high pressure common rail fuel injection system is made up of fuel supply pump housing 1, external rotor 2, internal rotor 3 and crossed joint 4, external rotor 2 is placed in the pump housing inner chamber 101 of fuel supply pump housing 1, internal rotor 3 is rotationally connected with the inner rotor shaft 102 of fuel supply pump housing 1 in external rotor 2, and crossed joint 4 is placed in the crossed joint mounting groove 303 of internal rotor 3.
Fuel supply pump housing structural drawing as shown in Figures 2 and 3, fuel supply pump housing 1 is the integrative-structure of means of a powder metallurgy technique processing.In circular pump housing inner chamber 101, on inner rotor shaft 102 bottom surface that is placed in pump housing inner chamber 101 vertical with pump housing inner chamber 101 bias, the center of circle of pump housing inner chamber 101 bottom surfaces is O
1, the center of circle of inner rotor shaft 102 on pump housing inner chamber 101 bottom surfaces is O
2, pass through O
2pump housing inner chamber 101 bottom surface radius O
1the length of A is r, O
2depart from O
1distance be d, the r of the present embodiment is 22.5mm, d is 2.2mm.With pump housing inner chamber 101 bottom surface radius O
1a is symmetry axis, and 2 half-moon-shaped grooves are symmetrically placed on pump housing inner chamber 101 bottom surfaces.Radius O
1the groove in A left side is high-voltage oil cavity 104, and the groove on right side is low pressure oil pocket 103.Oil inlet hole 105 is built in the lower end of low pressure oil pocket 103 bottom surfaces at low pressure oil pocket 103.Oil inlet hole 105 is the circular hole that penetrates the bottom of fuel supply pump housing 1, and fuel inlet fitting parts 110 are placed in the back side of fuel supply pump housing 1, and the intracavity bottom of fuel inlet fitting parts 110 is communicated with oil inlet hole 105, and the internal chamber wall of fuel inlet fitting parts 110 is worm structure.The seal groove 109 of ring is placed on fuel supply pump housing 1 front surface, and 3 fixed holes 108 are spacedly distributed on fuel supply pump housing 1 by Rotational Symmetry.On pump housing inner chamber 101 bottom surfaces, have a circular groove 106 along the cylndrical surface inwall of pump housing inner chamber 101, the width of circular groove 106 is 1mm, and the degree of depth is 0.5mm.On the bottom surface of the pump housing inner chamber 101 between the top of low pressure oil pocket 103 right side walls and the cylndrical surface inwall of pump housing inner chamber 101, have a transverse channels 107, the width of transverse channels 107 is 1mm, and the degree of depth is 0.5mm.
The structure of external rotor 2 is, external rotor outer wall 201 is cylndrical surface, external rotor outer wall 201 is Spielpassung with the inwall of pump housing inner chamber 101, external rotor inwall is rotational symmetric seven lobe profile of tooth cylinders, on external rotor inwall, there are 7 to parietal tooth lobe 203 in projecting inward external rotor, on external rotor outer wall 201, there are 7 axial through slots 202, article 7, axial through slot 202 is distributed in interior parietal tooth lobe 203 center-diameters of each external rotor to corresponding position, axially the width of through slot 202 is 1mm, the degree of depth is 0.15mm, as shown in Figure 4 and Figure 5.
The structure of internal rotor 3 is, internal rotor outer wall 301 is rotational symmetric six lobe profile of tooth cylinders, and the center of internal rotor 3 is circular internal rotor axis hole 302, the crossed joint mounting groove 303 of cydariform and the concentric front that is placed in internal rotor 3 of internal rotor axis hole 302, as shown in Figure 6.The crossed joint 4 of the cydariform shown in Fig. 7 is placed in the crossed joint mounting groove 303 of internal rotor 3, and the camshaft attachment hole 401 of crossed joint 4 by the center together camshaft 5 of rail pump connects.
In external rotor 2, internal rotor 3 and external rotor 2 are eccentric mutually, and in the pump housing inner chamber 101 of fuel supply pump housing 1, external rotor 2 and internal rotor 3 form the internally meshed rotor of a pair of bias as the operation element that produces oil pressure.Internal rotor 3 and external rotor 2 are means of a powder metallurgy technique processing.Oil transfer pump is in the time of work, and under the driving of camshaft 5, internal rotor 3 is power rotor, and external rotor 2 is driven rotor, and internal rotor 3 and external rotor 2 turn clockwise in the same way, between internal rotor outer wall 301 and external rotor inwall 202, intermesh by tooth lobe.
Fig. 8 is the scheme of installation of cycloid oil transfer pump for high pressure common rail fuel injection system.Interior the assembling after external rotor 2, internal rotor 3 and crossed joint 4 of fuel supply pump housing 1 of cycloid oil transfer pump, cycloid oil transfer pump is fastened on the common rail pump housing 6 with oil transfer pump fastening screw trip bolt 7, pump housing inner chamber 101 covers the common rail pump oil inlet hole on the common rail pump housing 6, the front surface of external rotor 2 and internal rotor 3 is lower than fuel supply pump housing 1 front surface 0.05mm, O type circle 9 is placed in the seal groove 109 of fuel supply pump housing 1 and seals, guarantee that fuel oil does not produce and leaks, the camshaft 5 of rail pump is connected with crossed joint 4 by the camshaft attachment hole 401 at center altogether.Low pressure fuel pipe tee union 8 is threaded connection and is fixed on fuel inlet fitting parts 110, and cycloid oil transfer pump is communicated with fuel tank.
Working principle of the present invention is, camshaft 5 rotates, drive internal rotor 3 to rotate by crossed joint 4, internal rotor 3 is power rotor, external rotor 2 is driven rotor, the tooth lobe of internal rotor 3 and external rotor 2 is eccentric engagement mutually, turn clockwise in the same way, fuel from fuel tank inspiration low pressure fuel pipe tee union 8 is full of to low pressure oil pocket 103 by oil inlet hole 105, internal rotor 3 and external rotor 2 form several independently oil pockets in engagement rotation process, along with the engagement rotation of inner and outer rotors, the volume of each oil pocket will change, in the oil pocket volume maximum corresponding to low pressure oil pocket 103 positions, inspiration fuel oil, in the oil pocket volume minimum corresponding to high-voltage oil cavity 104 positions, discharge has the fuel oil of certain pressure, the circulation engagement like this of the each tooth lobe of inner and outer rotors has formed suction oil process, provide fuel oil to common rail pump.In working cycle process, the between cog of internal rotor and external rotor keeps intermeshing, and therefore smooth running, pulses little, and noise is low, and volumetric efficiency is high.Different from the cycloid oil transfer pump of prior art is, on the bottom surface of the pump housing inner chamber 101 between top and pump housing inner chamber 101 inwalls of low pressure oil pocket 103 right side walls, have a transverse channels 107 and on external rotor outer wall 201 with each external rotor in radial position corresponding to parietal tooth Ban203 center, on external rotor outer wall 201, there is an axial through slot 202, when internal rotor 3 and external rotor 2 rotate, low pressure oil pocket 103 fuel oils that enter fuel supply pump housing 1 flow to the lubricated position of needs smoothly along transverse channels 107 and each axial through slot 202, in the transverse channels 107 limiting in the present invention and the axially width of through slot 202 and the scope of the degree of depth, between external rotor outer wall 201 and pump housing inner chamber 101 inwalls, produce oil film, due to the surface tension effects of liquid, external rotor 2 can directly not contact with fuel supply pump housing 1, external rotor 2 is state of suspension at fuel supply pump housing 1, avoid producing friction, improve the working life of oil transfer pump.
The present invention has ensured that fuel oil circulates in low pressure oil way system, and to the fuel oil of the enough flows of high-pressure injection pump supply and certain pressure, can improve energy-saving and emission-reduction and the combination property level of the domestic diesel engine of China.The present invention is applicable to the injecting fuel of diesel motor system of automobile.
Claims (6)
1. a floated cycloid rotor oil transfer pump, floated cycloid rotor oil transfer pump is by fuel supply pump housing (1), external rotor (2), internal rotor (3) and crossed joint (4) composition, external rotor (2) is placed in the pump housing inner chamber (101) of fuel supply pump housing (1), internal rotor (3) is rotationally connected with the inner rotor shaft (102) of fuel supply pump housing (1) in external rotor (2), crossed joint (4) is placed in the crossed joint mounting groove (303) of internal rotor (3), it is characterized in that, described fuel supply pump housing (1) is structure as a whole, in circular pump housing inner chamber (101), inner rotor shaft (102) is with on the eccentric also vertical bottom surface that is placed in pump housing inner chamber (101) of pump housing inner chamber (101), the center of circle of pump housing inner chamber (101) bottom surface is O
1, the center of circle of inner rotor shaft (102) on pump housing inner chamber (101) bottom surface is O
2, pass through O
2pump housing inner chamber (101) bottom surface radius O
1the length of A is r, O
2depart from O
1distance be d, with pump housing inner chamber (101) bottom surface radius O
1a is symmetry axis, and 2 half-moon-shaped grooves are symmetrically placed on pump housing inner chamber (101) bottom surface, radius O
1the groove in A left side is high-voltage oil cavity (104), the groove on right side is low pressure oil pocket (103), oil inlet hole (105) is built in the lower end of low pressure oil pocket (103) bottom surface at low pressure oil pocket (103), oil inlet hole (105) is for penetrating the circular hole bottom fuel supply pump housing (1), fuel inlet fitting parts (110) are placed in the back side of fuel supply pump housing (1), the intracavity bottom of fuel inlet fitting parts (110) is communicated with oil inlet hole (105), the internal chamber wall of fuel inlet fitting parts (110) is worm structure, the seal groove (109) of ring is placed on fuel supply pump housing (1) front surface, 3 fixed holes (108) are spacedly distributed on fuel supply pump housing (1) by Rotational Symmetry, on pump housing inner chamber (101) bottom surface, there is a circular groove (106) along the cylndrical surface inwall of pump housing inner chamber (101), between the top of low pressure oil pocket (103) right side wall and the cylndrical surface inwall of pump housing inner chamber (101), on the bottom surface of pump housing inner chamber (101), there is a transverse channels (107),
The structure of described external rotor (2) is, external rotor outer wall (201) is cylndrical surface, external rotor outer wall (201) is Spielpassung with the inwall of pump housing inner chamber (101), external rotor inwall is rotational symmetric seven lobe profile of tooth cylinders, on external rotor inwall, there are 7 to parietal tooth lobe (203) in projecting inward external rotor, on external rotor outer wall (201), have 7 axial through slots (202), 7 axial through slots (202) are distributed in interior parietal tooth lobe (203) center-diameter of each external rotor to corresponding position;
The structure of described internal rotor (3) is, internal rotor outer wall (301) is rotational symmetric six lobe profile of tooth cylinders, the center of internal rotor (3) is circular internal rotor axis hole (302), the crossed joint mounting groove (303) of cydariform and the concentric front that is placed in internal rotor (3) of internal rotor axis hole (302); The crossed joint (4) of cydariform is placed in the crossed joint mounting groove (303) of internal rotor (3), and crossed joint (4) is by camshaft attachment hole (401) camshaft of rail pump (5) connection together at center;
In external rotor (2), internal rotor (3) and external rotor (2) are eccentric mutually, in the pump housing inner chamber (101) of fuel supply pump housing (1), external rotor (2) and internal rotor (3) form the internally meshed rotor of a pair of bias as the operation element that produces oil pressure, and the front surface of external rotor (2) and internal rotor (3) is lower than fuel supply pump housing (1) front surface 0.03mm～0.07mm;
Oil transfer pump is in the time of work, under the driving of camshaft (5), internal rotor (3) is power rotor, and external rotor (2) is driven rotor, internal rotor (3) and external rotor (2) turn clockwise in the same way, between internal rotor outer wall (301) and external rotor inwall, intermesh by tooth lobe.
2. floated cycloid rotor oil transfer pump according to claim 1, is characterized in that, the width of described circular groove (106) is 0.8～1.2mm, and the degree of depth is 0.4～0.6mm.
3. floated cycloid rotor oil transfer pump according to claim 1, is characterized in that, the width of described transverse channels (107) is 0.7～1.2mm, and the degree of depth is 0.4～0.6mm.
4. floated cycloid rotor oil transfer pump according to claim 1, is characterized in that, the width of described axial through slot (202) is 0.7～1.2mm, and the degree of depth is 0.1～0.3mm.
5. floated cycloid rotor oil transfer pump according to claim 1, is characterized in that described O
2depart from O
1distance d be 8～10% of pump housing inner chamber (101) bottom surface radius r.
6. floated cycloid rotor oil transfer pump according to claim 1, is characterized in that, described fuel supply pump housing (1), external rotor (2) and internal rotor (3) all adopt means of a powder metallurgy technique processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167476.5A CN102678541B (en) | 2012-05-25 | 2012-05-25 | Fuel delivery pump with floated cycloid rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167476.5A CN102678541B (en) | 2012-05-25 | 2012-05-25 | Fuel delivery pump with floated cycloid rotor |
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| Publication Number | Publication Date |
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| CN102678541A CN102678541A (en) | 2012-09-19 |
| CN102678541B true CN102678541B (en) | 2014-08-06 |
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| CN201210167476.5A Active CN102678541B (en) | 2012-05-25 | 2012-05-25 | Fuel delivery pump with floated cycloid rotor |
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| CN104801399B (en) * | 2014-01-24 | 2018-01-16 | 上海意丰机电科技开发有限公司 | A kind of static pressure slewing supporting device |
| CN106014966B (en) * | 2016-07-28 | 2019-04-09 | 江苏金湖输油泵有限公司 | Single cylinder diesel oil transfer pump |
| CN109424538A (en) * | 2017-08-31 | 2019-03-05 | 杭州三花研究院有限公司 | Electronic oil pump |
| CN107435629A (en) * | 2017-09-09 | 2017-12-05 | 湖南机油泵股份有限公司 | A kind of impeller pump pump case and impeller pump |
| US10895257B2 (en) * | 2018-02-13 | 2021-01-19 | GM Global Technology Operations LLC | Lubrication strategy for dry run pump system |
| DE102018105121A1 (en) * | 2018-03-06 | 2019-09-12 | Schwäbische Hüttenwerke Automotive GmbH | support bags |
| CN110185910B (en) * | 2019-04-30 | 2021-07-30 | 奇瑞汽车股份有限公司 | Oil pump |
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| CN102678541A (en) | 2012-09-19 |
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