CN102678541A - Fuel delivery pump with floated cycloid rotor - Google Patents

Fuel delivery pump with floated cycloid rotor Download PDF

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Publication number
CN102678541A
CN102678541A CN2012101674765A CN201210167476A CN102678541A CN 102678541 A CN102678541 A CN 102678541A CN 2012101674765 A CN2012101674765 A CN 2012101674765A CN 201210167476 A CN201210167476 A CN 201210167476A CN 102678541 A CN102678541 A CN 102678541A
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CN
China
Prior art keywords
rotor
pump housing
chamber
external rotor
fuel supply
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CN2012101674765A
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Chinese (zh)
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CN102678541B (en
Inventor
张卫军
周明
乌江
牟学利
胡阳
谢之峰
张秉鉴
兰旭东
黄金鹏
黄旭东
李炳河
陈伟
刘健
岳志远
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山东鑫亚工业股份有限公司
清华大学
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Priority to CN201210167476.5A priority Critical patent/CN102678541B/en
Publication of CN102678541A publication Critical patent/CN102678541A/en
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Publication of CN102678541B publication Critical patent/CN102678541B/en

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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

Floated cycloid rotor oil transfer pump

Technical field

The invention belongs to technical field of automobile parts, particularly a kind of floated cycloid rotor oil transfer pump.

Background technique

Start the not enough problem of fuel feeding during automotive Diesel engine ubiquity low temperature low speed, can not be suitable for the needs of high pressure fuel system, the oil transfer pump of the mechanical type injection system that adopts at present; Comprise vane pump, gear pump and plunger pump; All exist pressure and flow pulse big, noise is high, and volumetric efficiency is low; Defectives such as low speed oil absorption difference cause the domestic automobile emissions of diesel engines not reach Europe III even Europe IV, the Europe V standard of international requirement.

In the DENG high pressure co-rail system; Should guarantee that in order to satisfy fuel oil circulates in the low pressure oil-way system; Can give high-pressure fuel supply system with the fuel delivery of enough flows and certain pressure again, cycloid rotor pump is the pattern that quilt is extensively praised highly in low-voltage high speed pump field in recent years.It is early stage 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, and domestic oil pump industry has also almost all adopted cycloid rotor pump on monoblock pump, but the cycloid rotor pump serious wear of existing technology, working life is short.Main cause is; Because internal rotor is assemblied on the eccentric shaft of the pump housing, and external rotor is rotation under the driving of internal rotor, and high pressure oil is under the situation that the mutual rotary course of inner and outer rotors reduces the volume between the inner and outer rotors, to produce; 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 bigger.Because the radial clearance of external rotor and the pump housing is very little, is not easy to produce oil film, thus in the high speed rotating process between external rotor and the pump housing friction terribly even can on the pump housing, produce burr, make external rotor and pump housing locking, the result scraps oil transfer pump.Therefore need be a kind of simple in structure, noise is low, and plot ratio is big, avoids the long lifetime cycloid rotor oil transfer pump of direct contact friction between the external rotor and the pump housing.

Summary of the invention

It is described a kind of simple in structure to the objective of the invention is to solve background technique, and noise is low, and plot ratio is big; The cycloid rotor oil transfer pump problem of long service life provides a kind of floated cycloid rotor oil transfer pump, and floated cycloid rotor oil transfer pump is made up of fuel supply pump housing 1, external rotor 2, internal rotor 3 and cross joint 4; External rotor 2 places 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 cross joint 4 places in the cross joint mounting groove 303 of internal rotor 3, it is characterized in that; Fuel supply pump housing 1 is structure as a whole; In the pump housing inner chamber 101 of circle, inner rotor shaft 102 and pump housing inner chamber 101 be eccentric and vertical to be placed on the bottom surface of pump housing inner chamber 101, and 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, 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 a 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 a high-voltage oil cavity 104; The groove on right side is a low pressure oil pocket 103, and oil inlet hole 105 is built in the lower end of low pressure oil pocket 103 bottom surfaces at low pressure oil pocket 103, and oil inlet hole 105 is for penetrating the circular hole of fuel supply pump housing 1 bottom; Fuel inlet fitting parts 110 place 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, and the internal chamber wall of fuel inlet fitting parts 110 is a worm structure, and the seal groove 109 of ring places on fuel supply pump housing 1 front surface; 3 fixed holes 108 are spacedly distributed on fuel supply pump housing 1 by the rotation symmetry; The cylndrical surface inwall of pump housing inner chamber 101 has a circular groove 106 in upper edge, pump housing inner chamber 101 bottom surface, between the cylndrical surface inwall of the top of low pressure oil pocket 103 right side walls and pump housing inner chamber 101, a transverse channels 107 is arranged on the bottom surface of pump housing inner chamber 101;

The structure of said external rotor 2 does; External rotor outer wall 201 is the cylndrical surface; External rotor outer wall 201 is a Spielpassung with the inwall of pump housing inner chamber 101, and the external rotor inwall is rotational symmetric seven lobe profile of tooth cylinders, and 7 parietal tooth lobes 203 in projecting inward external rotor are arranged on the external rotor inwall; There are 202,7 axial through slots 202 of 7 axial through slots to be distributed in radially corresponding position, parietal tooth lobe 203 centers in each external rotor on the external rotor outer wall 201;

The structure of said internal rotor 3 does, 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, cross the joint mounting groove 303 and the internal rotor axis hole 302 concentric fronts that place internal rotor 3 of cydariform; The cross joint 4 of cydariform places in the cross joint mounting groove 303 of internal rotor 3, and cross joint 4 is through camshaft attachment hole 401 camshaft 5 connections of rail pump together at center;

In external rotor 2; Internal rotor 3 is eccentric mutually with external rotor 2; In the pump housing inner chamber 101 of fuel supply pump housing 1; External rotor 2 constitutes the operation element of the internally meshed rotor of a pair of off-centre as the generation oil pressure with internal rotor 3, 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 when work, and under the driving of camshaft 5, internal rotor 3 is a power rotor, and external rotor 2 is a driven rotor, and internal rotor 3 turns clockwise with external rotor 2 in the same way, intermeshes through the tooth lobe between internal rotor outer wall 301 and the external rotor inwall.

The width of said circular groove 106 is 0.8~1.2mm, and the degree of depth is 0.4~0.6mm;

The width of said transverse channels 107 is 0.7~1.2mm, and the degree of depth is 0.4~0.6mm;

The width of said axial through slot 202 is 0.7~1.2mm, and the degree of depth is 0.1~0.3mm;

Said O 2Depart from O 1Be 8~10% of pump housing inner chamber 101 bottom surface radius r apart from d;

Said fuel supply pump housing 1, external rotor 2 and internal rotor 3 all adopt means of a powder metallurgy technique processing.

Characteristics of the present invention are 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, a transverse channels 107 is arranged; On external rotor outer wall 201 with each external rotor in the corresponding radial position in parietal tooth lobe 203 centers, an axial through slot 202 is arranged on the external rotor outer wall 201.The fuel oil that gets into fuel supply pump housing 1 low pressure oil pocket 102 flows to smoothly along transverse channels 107 and the axial through slot 202 of each bar and needs lubricated position.In the scope of the width of transverse channels 107 that the present invention limits and axial through slot 202 and 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, and 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 does, fuel supply pump housing is structure as a whole, and oil inlet hole places 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, and internal rotor center and external rotor misalignment are little; Inner and outer rotors rotates in the same way; Between cog forms independently oil pocket, and the between cog of internal rotor and external rotor keeps being meshing with each other in the work cycle process, has realized simple in structure, noise is low and plot ratio is big requirement to oil transfer pump; The axial through slot that is provided with in the transverse channels that is provided with on the fuel supply pump housing with on the external rotor outer wall; Avoid external rotor and fuel supply pump housing directly to contact and produced friction; The oil transfer pump that makes can be brought up to about 1000 hours from about 500 hours of existing technology working life, and situation about not increasing at cost has increased by one times following working life.Be 178 yuan and need 20,000 calculating every year by each oil transfer pump unit price, adopt oil transfer pump of the present invention only to need 10,000 and get final product, can economize on the use of funds 1780000 yuan, producing huge economic benefit.

Description of drawings

Fig. 1 is floated cycloid rotor oil transfer pump structural representation;

Fig. 2 is the fuel supply pump housing plan view;

Fig. 3 is a B-B place sectional view among Fig. 3;

Fig. 4 is the external rotor plan view;

Fig. 5 is a C-C place sectional drawing among Fig. 4;

Fig. 6 is the internal rotor plan view;

Fig. 7 is cross joint plan view;

Fig. 8 is used for the scheme of installation of high pressure common rail fuel injection system for floated cycloid rotor oil transfer pump.

Among the figure, 1--fuel supply pump housing, 2--external rotor, 3--internal rotor, 4--cross joint, 5--camshaft; 6--is the rail pump housing altogether, 7--oil transfer pump fastening screw trip bolt, 8--fuel inlet fitting parts, 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; The 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 the 203--external rotor, 301--internal rotor outer wall, 302--internal rotor axis hole, 303--cross joint mounting groove, 401--camshaft attachment hole.

Embodiment

Below in conjunction with embodiment and accompanying drawing the present invention is further described.

Fig. 1 is the cycloid oil transfer pump example structure schematic representation in the high pressure common rail fuel injection system; Cycloid oil transfer pump in the high pressure common rail fuel injection system is made up of fuel supply pump housing 1, external rotor 2, internal rotor 3 and cross joint 4; External rotor 2 places 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 cross joint 4 places in the cross 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 the pump housing inner chamber 101 of circle, inner rotor shaft 102 is vertical with pump housing inner chamber 101 off-centre to be placed on the bottom surface of pump housing inner chamber 101, and 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, 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 present embodiment is 22.5mm, d is 2.2mm.With pump housing inner chamber 101 bottom surface radius O 1A is a 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 a high-voltage oil cavity 104, and the groove on right side is a 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 place 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 a worm structure.The seal groove 109 of ring places on fuel supply pump housing 1 front surface, and 3 fixed holes 108 are spacedly distributed on fuel supply pump housing 1 by the rotation symmetry.The cylndrical surface inwall of pump housing inner chamber 101 has a circular groove 106 in upper edge, pump housing inner chamber 101 bottom surface, and 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 cylndrical surface inwall of the top of low pressure oil pocket 103 right side walls and pump housing inner chamber 101, a transverse channels 107 is arranged, the width of transverse channels 107 is 1mm, and the degree of depth is 0.5mm.

The structure of external rotor 2 does; External rotor outer wall 201 is the cylndrical surface, and external rotor outer wall 201 is a Spielpassung with the inwall of pump housing inner chamber 101, and the external rotor inwall is rotational symmetric seven lobe profile of tooth cylinders; 7 parietal tooth lobes 203 in projecting inward external rotor are arranged on the external rotor inwall; Have 202,7 axial through slots 202 of 7 axial through slots to be distributed in radially corresponding position, parietal tooth lobe 203 centers in each external rotor on the external rotor outer wall 201, axially the width of through slot 202 is 1mm; The degree of depth is 0.15mm, like Fig. 4 and shown in Figure 5.

The structure of internal rotor 3 does, 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, and cross the joint mounting groove 303 and the internal rotor axis hole 302 concentric fronts that place internal rotor 3 of cydariform are as shown in Figure 6.The cross joint 4 of cydariform shown in Figure 7 places in the cross joint mounting groove 303 of internal rotor 3, and cross joint 4 is through camshaft attachment hole 401 camshaft 5 connections of rail pump together at center.

In external rotor 2, internal rotor 3 is eccentric mutually with external rotor 2, and in the pump housing inner chamber 101 of fuel supply pump housing 1, the internally meshed rotor of external rotor 2 and a pair of off-centre of internal rotor 3 formations is as the operation element that produces oil pressure.Internal rotor 3 is means of a powder metallurgy technique processing with external rotor 2.Oil transfer pump is when work, and under the driving of camshaft 5, internal rotor 3 is a power rotor, and external rotor 2 is a driven rotor, and internal rotor 3 turns clockwise with external rotor 2 in the same way, intermeshes through the tooth lobe between internal rotor outer wall 301 and the external rotor inwall 202.

Fig. 8 is used for the scheme of installation of high pressure common rail fuel injection system for the cycloid oil transfer pump.After in the fuel supply pump housing 1 of cycloid oil transfer pump, having assembled external rotor 2, internal rotor 3 and cross joint 4; With oil transfer pump fastening screw trip bolt 7 the cycloid oil transfer pump is fastened on the common rail pump housing 6; The common rail pump oil inlet hole that pump housing inner chamber 101 will be total on the rail pump housing 6 covers; 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 places in the seal groove 109 of fuel supply pump housing 1 and seals, and guarantees that fuel oil does not produce to leak, and the camshaft attachment hole 401 of the camshaft 5 of rail pump through the center saves 4 with cross and be connected altogether.Low pressure fuel pipe tee union 8 is fixed on the fuel inlet fitting parts 110 through being threaded, and the cycloid oil transfer pump is communicated with fuel tank.

Working principle of the present invention is that camshaft 5 rotates, and drives internal rotor 3 rotations through cross joint 4; Internal rotor 3 is a power rotor, and external rotor 2 is a driven rotor, the eccentric each other engagement of the tooth lobe of internal rotor 3 and external rotor 2; Turn clockwise in the same way, be full of low pressure oil pocket 103 to fuel from fuel tank inspiration low pressure fuel pipe tee union 8 through oil inlet hole 105, internal rotor 3 forms the several separate oil pocket with external rotor 2 in the engagement rotation process; Along with the engagement rotation of inner and outer rotors, the volume of each oil pocket will change, and will be maximum at the oil pocket volume corresponding to low pressure oil pocket 103 positions; The inspiration fuel oil, minimum at oil pocket volume corresponding to high-voltage oil cavity 104 positions, discharge fuel oil with certain pressure; The circulation engagement like this of each tooth lobe of inner and outer rotors has formed suction oil process, to being total to the rail pump fuel oil is provided.The between cog of internal rotor and external rotor keeps being meshing with each other in the work cycle process, and therefore running is steady, and it is little to pulse, and noise is low, and volumetric efficiency is high.Different with the cycloid oil transfer pump of existing technology is; 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 a transverse channels 107 is arranged and on external rotor outer wall 201 with each external rotor in the corresponding radial position in parietal tooth lobe 203 centers; An axial through slot 202 is arranged on the external rotor outer wall 201; When internal rotor 3 rotated with external rotor 2, low pressure oil pocket 103 fuel oils that get into fuel supply pump housing 1 flow to smoothly along transverse channels 107 and the axial through slot 202 of each bar and need lubricated position, in the scope of the width of transverse channels 107 that the present invention limits and axial through slot 202 and the degree of depth; Between external rotor outer wall 201 and pump housing inner chamber 101 inwalls, produce oil film; Because the surface tension effects of liquid, external rotor 2 can directly not contact with fuel supply pump housing 1, and external rotor 2 is state of suspension at fuel supply pump housing 1; Avoid producing friction, the working life of having improved oil transfer pump.

The present invention has guaranteed that fuel oil circulates in the low pressure oil-way system, and to the fuel oil of enough flows of high-pressure injection pump supply and certain pressure, can improve the energy-saving and emission-reduction and the combination property level of the homemade diesel engine of China.The present invention is applicable to the injecting fuel of diesel motor system of automobile.

Claims (6)

1. floated cycloid rotor oil transfer pump; Floated cycloid rotor oil transfer pump is made up of fuel supply pump housing (1), external rotor (2), internal rotor (3) and cross joint (4); External rotor (2) places 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 cross joint (4) places in the cross joint mounting groove (303) of internal rotor (3), it is characterized in that; Said fuel supply pump housing (1) is structure as a whole; In the pump housing inner chamber (101) of circle, inner rotor shaft (102) and pump housing inner chamber (101) be eccentric and vertical to be placed on the bottom surface of pump housing inner chamber (101), and 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, 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 a 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 the fuel supply pump housing (1), and fuel inlet fitting parts (110) place 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); The internal chamber wall of fuel inlet fitting parts (110) is a worm structure; The seal groove of ring (109) places on fuel supply pump housing (1) front surface, and 3 fixed holes (108) are spacedly distributed on fuel supply pump housing (1) by the rotation symmetry, at the cylndrical surface inwall of pump housing inner chamber (101) upper edge, bottom surface pump housing inner chamber (101) circular groove (106) are arranged; Between the cylndrical surface inwall of the top of low pressure oil pocket (103) right side wall and pump housing inner chamber (101), a transverse channels (107) is arranged on the bottom surface of pump housing inner chamber (101);
The structure of said external rotor (2) does; External rotor outer wall (201) is the cylndrical surface; External rotor outer wall (201) is a Spielpassung with the inwall of pump housing inner chamber (101), and the external rotor inwall is rotational symmetric seven lobe profile of tooth cylinders, and 7 parietal tooth lobes (203) in projecting inward external rotor are arranged on the external rotor inwall; 7 axial through slots (202) are arranged on the external rotor outer wall (201), and 7 axial through slots (202) are distributed in radially corresponding position, parietal tooth lobe (203) center in each external rotor;
The structure of said internal rotor (3) does; 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 cross joint mounting groove (303) and the concentric front that places internal rotor (3) of internal rotor axis hole (302) of cydariform; The cross joint (4) of cydariform places in the cross joint mounting groove (303) of internal rotor (3), and cross joint (4) is through 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) constitute the internally meshed rotor of a pair of off-centre 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 when work; Under the driving of camshaft (5), internal rotor (3) is a power rotor, and external rotor (2) is a driven rotor; Internal rotor (3) and external rotor (2) turn clockwise in the same way, intermesh through the tooth lobe between internal rotor outer wall (301) and the external rotor inwall.
2. floated cycloid rotor oil transfer pump according to claim 1 is characterized in that the width of said 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 said 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 said 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 said O 2Depart from O 1Be 8~10% of pump housing inner chamber (101) bottom surface radius r apart from d.
6. floated cycloid rotor oil transfer pump according to claim 1 is characterized in that, said fuel supply pump housing (1), external rotor (2) and internal rotor (3) all adopt means of a powder metallurgy technique processing.
CN201210167476.5A 2012-05-25 2012-05-25 Fuel delivery pump with floated cycloid rotor CN102678541B (en)

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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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CN102678541A true CN102678541A (en) 2012-09-19
CN102678541B CN102678541B (en) 2014-08-06

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Cited By (5)

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Publication number Priority date Publication date Assignee Title
CN104801399A (en) * 2014-01-24 2015-07-29 上海意丰机电科技开发有限公司 Static pressure rotary support apparatus
CN106014966A (en) * 2016-07-28 2016-10-12 江苏金湖输油泵有限公司 Single-cylinder diesel engine oil delivery pump
CN110159527A (en) * 2018-02-13 2019-08-23 通用汽车环球科技运作有限责任公司 Lubrication strategies for dry-running pumping system
CN110185910A (en) * 2019-04-30 2019-08-30 奇瑞汽车股份有限公司 Lubricating oil pump
CN110230594A (en) * 2018-03-06 2019-09-13 施瓦本冶金工程汽车有限公司 Rotary pump

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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
CN110159527A (en) * 2018-02-13 2019-08-23 通用汽车环球科技运作有限责任公司 Lubrication strategies for dry-running pumping system
CN110230594A (en) * 2018-03-06 2019-09-13 施瓦本冶金工程汽车有限公司 Rotary pump
CN110185910A (en) * 2019-04-30 2019-08-30 奇瑞汽车股份有限公司 Lubricating oil pump

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