CN87207320U - Axial plunger fuel pump with a sloping cam plate - Google Patents
Axial plunger fuel pump with a sloping cam plate Download PDFInfo
- Publication number
- CN87207320U CN87207320U CN 87207320 CN87207320U CN87207320U CN 87207320 U CN87207320 U CN 87207320U CN 87207320 CN87207320 CN 87207320 CN 87207320 U CN87207320 U CN 87207320U CN 87207320 U CN87207320 U CN 87207320U
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- oil
- pump
- plunger
- hole
- variable
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- Expired - Lifetime
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Abstract
The utility model discloses an axial plunger fuel pump with a sloping cam plate, which is a grate combustion device for providing a grate with limiting fuel oil with constant pressure. The axial plunger fuel pump is characterized in that a medium sealing device is arranged at the outside of the matching surface of a retaining ring and a pump body which are on a drive shaft; a whelk hole for replacing lubricating oil is arranged on a pump case; a rolling rubbing pair in a sloping cam plate mechanism adopts a plane ball bearing. When an oil matching hole of an oil matching zone of a driving cylinder arranges three or more than three loops at a meridional position of the cylinder, the oil matching hole is divided into two staggered sections, and the middle of the two staggered sections are communicated with each other via a cylindrical hole which is perpendicular to the axial direction of the cylinder. The utility model has the advantages of compact structure, easy fabrication, long service life and no oil leakage, applicable for fuel oil with high or low viscosity and heavy or light weight.
Description
The utility model relates to kiln burning equipment, is a kind of fuel oil metering pump with an oil-feed port, a plurality of oil outlets.
Inspection information, comparatively close with the utility model is the fuel oil metering pump that a kind of West Germany OELWARME company produces, it is made of AC asynchronous motor, elastic coupling flexible coupling, support, pump portion, and pump portion is made up of the pump housing, pump case, transmission shaft, cylinder body, plunger, plunger backhaul mechanism, swash plate body, variable shell, variable piston, variable adjusting screw rod etc.In the various stove system that with the fuel oil is fuel, use this pump, can realize that the stove fuel feeding controls automatically, the workpiece homogeneous heating, oil consumption is few, and operator's labor intensity alleviates; And, but the external at present novel fuel nozzle of a kind of fuel-economizing more than 50% that uses, must such pump of adapted.So far the domestic technology of still not having this class fuel oil metering pump of use.But in the pump chamber of existing this fuel oil metering pump, concentrated that the swash plate rolling friction is paid, the some contact friction of plunger and swash plate is paid, plunger and the contact friction of plunger loop wire is paid, in plunger ring and the plunger backhaul mechanism between the backhaul dish face contact friction pay, backhaul dish and most of main fastness such as the contact friction of centering spring seat line is paid, cylinder body and pump case sliding friction are paid, in the operation process, each must produce the abrasion particulate to fastness and intersperse among in the pump chamber lubricant oil; Simultaneously, though this pump makes pump chamber and suction, oil-discharging cavity spaced-apart in design, but also need keep necessary movement clearance, therefore the fuel oil in lubricant oil in the pump chamber and suction, the oil-discharging cavity can exchange phenomenon, pump chamber lubricant oil intermediate fuel oil content is increased with prolonging running time, and particularly the lightweight low-viscosity oil is then more remarkable.Therefore, the particulate under the friction and the infiltration of fuel oil add that lubricant oil itself is aging, has worsened lubricating condition.This pump does not structurally have the more device of oil change, thus can not give full play to the working life of this pump, also narrow to the Applicable scope of fuel oil.Secondly, each oil distributing hole is oblique small sircle hole on such pump cylinder, joins the straight oblique prick post consent of oily end face by cylinder body, and this oblique hole structure is a pump 3 or more to oil outlet quantity, must make the cylinder body elongation, has increased the volume and weight of whole pump; And, oblique hole structure has increased difficulty to processing, and precision is difficult for guaranteeing that main is, for the oblique small aperture on this cylinder body is matched with distributing groove size on the pump housing, consider oblique and factor, can only make the real aperture less than the port size of joining at cylinder body on the oily end face, so, advance, the oil extraction damping is bigger, for the fuel oil metering pump of big specification more than 4 * 80, generally have to input pressure is improved, remain on more than the 0.2MPa.The 3rd, the swash plate body of such pump is made up of hemispheric variable head, variable head bearing pin, plurality of rollers and cover plate, and variable head and bearing pin are over-surplus fit structure, and roller is pressed on the plane of variable head with cover plate.Such structure makes the variable head become the part of swash plate plane retaining bearing, in case because of after rolling friction pays wearing and tearing or fatigue failure, must change swash plate body is whole, has caused unnecessary waste.The 4th, be the plane clearance sealing between the pump housing of this pump and the back-up ring on the transmission shaft, in actual the use obvious seepage phenomenon is arranged, for the lightweight low-viscosity oil, seepage is even more serious.The 5th, also there is unreasonable part in such pump on the structural design of other parts, as screw plug is once arranged on the variable shell, for prevent that the variable piston from rotating in variable shell, adorned one pair of feather key on variable shell, these structures are not only too complicated, also increased unnecessary seepage chance; The medium runner of control pump temperature adopts the peripheral hardware fabricated construction, has increased the volume and weight of pump etc.
Task of the present utility model provides a kind of multiple exit fuel oil metering pump, improve existing similar pump performance, make it to enlarge the fuel oil scope of using, reduction solves the oil impregnate problem of pump to the requirement of input pressure, improves the working life of pump, make pump structure simple, compact simultaneously, volume is little, and is in light weight, convenient operating maintenance.Another purpose of the present utility model is to improve the manufacturing process performance of pump, reduces manufacturing, the maintenance cost of pump.
The purpose of this utility model and task reach with following structure:
This inclined disc type axial plunger fuel pump is made up of support, motor, coupling, transmission shaft, the pump housing, pump case, driving cylinder body, plunger, plunger backhaul mechanism, swash plate body, variable shell, variable piston, variable adjusting screw rod etc.The back-up ring that matches with the pump housing is housed on the transmission shaft.Oil distributing zone on the pump housing radially has semi-circular oil suction groove in n road and oil-discharge trough, and oil suction groove in n road communicates with a filler opening, and n road oil-discharge trough communicates with n oil outlet respectively.Corresponding therewith, have the joining of the driving cylinder body that joins with the pump housing one group and plunger hole communicates, quantity equates oil distributing hole on the oil end, oil distributing hole exports along the cylinder body radially direct on n road concentric circumferences, inhale on the concentrically ringed radial distance of its per pass and the pump housing, the radial distance of oil-discharge trough is consistent, a uniform m oil distributing hole on each concentric circumferences is joined total n * m oil distributing hole on the oil end so drive cylinder body at this.Concerning each oil distributing hole, axial its cross section difference along himself is divided into two sections of macropore section and aperture section, and the macropore section communicates with plunger hole, and aperture section communicates with suction, oil-discharge trough on the pump housing.According to the different requirements to fuel pump, getting n in design is 1,2,3,4,6,8 roads, and oil distributing hole m is 2,3,5,7 on the per pass.More than said plunger backhaul mechanism comprise plunger ring, plunger backhaul dish, central spring, centering spring seat; Swash plate body comprises variable head bearing pin, hemisphere variable head, rolling element, circlip and cover plate.Fitting surface place among the design between the back-up ring and the pump housing is provided with the medium-tight structure, cuts off the passage that continues to exosmose because of clearance plane fuel oil between the pump housing and the back-up ring plane with this structure.The pump case front portion of general fuel pump is a pump chamber; plunger backhaul mechanism and swash plate body are housed in this pump chamber; and be filled with lubricant oil; it among the design the working life of protection pump; can regularly replace lubricant oil, thus a screw that the pump chamber and the external world are communicated respectively designed in the top and the bottom of pump case pump chamber part, and shut with screw plug; when needing more oil change, open screw plug.In the design, swash plate body has been done improvement, rolling element in the swash plate body and cover plate replace with whole plane ball journal and centralized positioning plate, centralized positioning plate glue is in bearing upper cover plate endoporus, bearing then is fitted on the hemisphere variable head, like this, in case when need changing rolling friction and paying, only need change the plane ball bearing and get final product, not need the whole replacing of swash plate body.
In the utility model, when 〉=3, promptly driving the oil distributing hole mouth that cylinder body joins on the oil end radially is distributed with when (three above concentric circumferences being arranged) more than three layers, except that outermost is two-layer, oil distributing hole since the 3rd layer (on other layer), its macropore section and aperture section can adopt the clear opening structure of being interrupted and staggering (macropore section and aperture section clear opening are interrupted and axially stagger), disconnected during this time place both use perpendicular to the drive cylinder axon to cylindrical hole connect, make it to become passage.Such structure, during the pump work oil suction, fuel oil is from oil suction groove, aperture section, enter plunger hole by vertical cylindrical through hole, macropore section; During oil extraction, fuel oil is from plunger hole, macropore section, outside vertical cylindrical through hole, aperture section, oil-discharge trough and oil outlet excavationg pump.
The medium-tight structure at fitting surface place between back-up ring and the pump housing on the transmission shaft can be to have a road sealing groove on the back-up ring outer circumferential face in the utility model, in this groove rubber seal is housed; Or on the pump housing, have seal groove, in this groove, rubber seal is housed; Also can be on the back-up ring outer circumferential face or be covered with sealer on the pump housing endoporus side face and form.
For preventing that the rotation of variable piston in variable shell from consequently influencing the proper motion of swash plate body, have guiding groove with variable head bearing pin joint on the variable piston, the guiding groove width matches with the diameter of the cylindrical part of movable therein variable head bearing pin.
At the middle part of pump case, be positioned on the pump case that drives the cylinder body place, be cast with the medium inner flow passage of control pump temperature with the pump case one.
Owing to adopt said structure, the utility model has the advantages that enlarged the input pressure scope of pump, to the pump more than 4 * 80, minimum input pressure declines by a big margin, 0.15MPa can descend.The utility model has solved the oil impregnate problem at the existing overhanging place of similar pump drive shaft.Because the utility model is provided with one group of hole of changing oil on pump case, just can change the lubricant oil that wear particle increases in the pump chamber, fuel oil content increases and itself is aging easily, compare with existing fuel pump, improved working life, and easily the low viscosity light fuel that takes place to exchange by gap and lubricant oil also can use.In addition, after wearing and tearing or fatigue failure are paid in the swash plate body rolling friction, can only change the single direction thrust ball bearing of standard, just save the raw material of variable head, variable head bearing pin, machining period has reduced the maintenance cost of pump; Because the design's pump structure is simplified, part reduces in addition, and technology capability is improved, and has reduced cost of production.
Description of drawings:
Fig. 1 is that master of the present utility model looks longitudinal sectional view.
Fig. 2 overlooks the partial cutaway diagrammatic sketch.
Fig. 3 is the partial schematic diagram of the utility model pump housing sealing configuration.
Embodiment of the present utility model as shown in drawings.
Consult Fig. 1, wherein 24 for being contained in the back-up ring on the transmission shaft 5, has a road sealing groove on its outer circumferential face, and O type rubber seal 23 is housed, and this structure has been cut off by the gap 22 between the back-up ring 24 and the pump housing 4 and continued the passage of oil impregnate outward.Transmission shaft with pass the pump housing 4 and drive cylinder body 6 and be connected.Drive cylinder body 6 and be contained in the pump case 7, and can rotate therein.Drive on the cylinder body 6 and have 12 plunger holes, the even cloth of its oil distributing hole mouth is on the concentric circle of four different-diameters, and (be n=4, m=3), all be furnished with plunger 8 in these plunger holes, plunger hole communicates with the oil distributing hole of joining oily end place (macropore section).The head of plunger 8 is connected with the plunger ring of plunger backhaul mechanism 20, plunger ring is connected with plunger backhaul dish, and the termination of plunger 8 is a cone centre.Backhaul dish intermediate projections (being hemispherical) part contacts with the centering spring seat that is positioned at driving cylinder body 6 centres; Inner conical surface is made in the centering spring seat end, and the formation line line contact friction that matches with the protuberance of backhaul dish is paid.What be connected with pump case 7 left ends is variable shell 9, the swash plate body that is equipped with variable piston 11, variable adjusting screw rod 10 in the variable shell 9 and is made up of variable head bearing pin 15, hemisphere variable head 16, one-way planar ball bearing 18, circlip 17 and centralized positioning plate 19.The hemisphere face of variable head 16 is engaged in the hemisphere nest of variable shell 9, dress standard one-way planar ball bearing 18 on the hemisphere variable head 16, glued joint a centralized positioning plate 19 with the GY-340 anaerobic adhesive in the upper cover plate endoporus of this bearing, the splicing body that the circlip 17 on variable head bearing pin 15 spindle noses blocks centralized positioning plate 19 and bearing 18 upper cover plates comes off when assembling.Variable head bearing pin 15 and hemisphere variable head 16 interference fit.The bulb of variable head bearing pin 15 is engaged in the horizontal circular hole of variable piston 11, and the diameter of the width of the waist shape guiding groove 13 that joins with this horizontal circular hole and the column part 12 of variable head bearing pin 15 is identical, i.e. nominal size unanimity, movingly.This structure has just limited the rotation of variable piston 11.On pump case 7, be cast with the medium inner flow passage 21 of control pump temperature among the design with the pump case one.
Among Fig. 2, be provided with four semi-circular oil suction grooves 35 and four semi-circular oil-discharge troughs 26 at the oil distributing zone of the pump housing 4 by different radii distance radially, oil suction groove 35 communicates with a filler opening 34, and oil-discharge trough 26 communicates with four oil outlets 25 respectively.See by Fig. 2, connect to drive on cylinder body 6 upper prop consents and the pump housing 4 inhale, the passage of oil-discharge trough be positioned at drive cylinder body 6 join its sectional shape of oily end be columniform macropore section 29 and oval shape aperture section 33 these large and small through holes with connect to vertical cylindrical hole 27 with Boring mill.This cylindrical hole is shut with screw plug 28 in the place, aperture after manufacturing is finished.30 is tank filler sleeve on the pump case 7 among the figure, and 31 is the drain oil at place, pump case 7 bottoms.Pump when running two oilholes are all shut with screw plug 32, when changing oil two screw plugs 32 are unclamped, and drain first behind the sump oil drain oil 31 usefulness screw plugs 32 to be blocked, fill it up with new oil after, block tank filler sleeve 30 with screw plug 32 again.
Among Fig. 2,36 is the import and export joint of the interior circulation 21 of medium of control pump temperature on the pump case 7.
Among Fig. 3,37 is the seal groove on the pump housing 4, and 38 is O type rubber seal wherein.
More than said vehicle fuel pump structure, its Placement and working state are: AC induction motor 1, support 2, the pump housing 4, pump case 7, variable shell 9 are linked in sequence.Motor 1 main shaft links to each other with transmission shaft 5 by elastic coupling flexible coupling 3, transmission shaft 5 is connected with driving cylinder body 6, drive in the cylinder body plunger 8, central spring, centering spring seat are housed, centering spring seat contacts with plunger backhaul dish, and plunger 8 is connected with the backhaul dish by plunger ring and partly contacts with upper cover plate on the swash plate body midplane ball bearing.Swash plate body is contained in the variable shell 9, and its variable bearing pin 15 is connected with variable piston 11, and the variable piston is running fit in the piston hole of variable shell 9.Such mechanism, when starting power supply, the main shaft of motor 1 makes transmission shaft 5 by coupling 3 and drives cylinder body 6 rotations with constant substantially rotating speed, cylinder body 6 drives plunger 8 rotations, backhaul mechanism 20 forces each plunger summit to be attached on the rotating upper cover plate clinoplain of bearing 18 of swash plate body always, each plunger 8 is reciprocating in each plunger hole again when rotating with cylinder body 6, and half cycle is pulled out motion, and half cycle is pressed into motion.Plunger is pulled out the oil suction of plunger movable hole, and plunger is pressed into the oil extraction of plunger movable hole.If the angle of inclination of swash plate body is certain, then the reciprocating stroke of each plunger 8 is certain, i.e. the suction of plunger hole, oil extraction be certain, realize limiting the quantity of; If rotate variable adjusting screw rod 10 several angles, dependent variable adjusting screw rod 10 is paid with the screw thread of variable piston 11 and is cooperated, make the variable piston move a segment distance vertically, drive the corresponding change of swash plate body one angle of inclination, the reciprocating stroke of each plunger 8 changes certain-length thereupon, thereby change suction, the oil drain quantity of each plunger hole, realize limiting the quantity of control.
Claims (4)
1, a kind of kiln burning equipment that is used for, limiting the quantity of to stove provides the inclined disc type axial plunger fuel pump of level pressure fuel oil,
(1), by support 2, motor 1, coupling 3, transmission shaft 5, the pump housing 4, pump case 7, drive cylinder body 6, plunger 8, plunger backhaul mechanism 20, swash plate body, variable shell 9, variable piston 11, variable adjusting screw rod 10 and formed,
(2), the back-up ring 24 that matches with the pump housing 4 is housed on the transmission shaft,
(3), oil distributing zone radially has the semi-circular oil-discharge trough 26 of semi-circular oil suction groove 35 in n road and n road on the pump housing 4,
(3.1), the semi-circular oil suction groove 35 in n road communicates with a filler opening 34,
(3.2), the semi-circular oil-discharge trough 26 in n road communicates with n oil outlet 25 respectively,
(4), drive cylinder body 6 and join and have one group and the plunger hole on it communicates, quantity equates oil distributing hole on the oil end,
(4.1), each oil distributing hole axially is divided into 33 two sections of macropore section 29 and aperture section along himself, macropore section 29 communicates with plunger hole, oil suction groove 26 on aperture section 33 and the pump housing 4 and row wash in a pan groove 35 and communicate,
(4.2), the oil distributing hole mouth along cylinder body 6 radially direct on n road concentric circumferences,
(4.3), uniform m oil distributing hole mouth on each concentric circumferences,
(4.4), to drive cylinder body 6 oil distributing hole total quantitys be n * m,
(5), n is 1,2,3,4,6,8 roads, m is 2,3,5,7,
(6), plunger backhaul mechanism 20 is by plunger ring plunger backhaul dish, central spring, centering spring seat is formed,
(7), swash plate body comprises variable head bearing pin 15, hemisphere variable head 16, rolling element, circlip 17 and cover plate,
Of the present utility model being characterised in that:
(8), the fitting surface place of 4 of said back-up ring 24 and the pump housings is provided with the medium-tight structure in (2),
(9), said pump case 7 in (1), respectively have in the top of its pump chamber part and bottom to make pump chamber and the extraneous screw 30 and 31 that communicates one by one, and screw plug 32 be housed,
(10), the rolling element in the said swash plate body, cover plate hold with the centralized positioning plate with a plane ball bearing and replace in (7).
2, fuel pump according to claim 1, it is characterized by said oil distributing hole in (4), when n 〉=3 except that outermost is two-layer, from the clear opening that its civilian hole section 29 of the 3rd layer oil distributing hole and aperture section 33 stagger for interruption, both use perpendicular to driving cylinder body 6 axial cylindrical holes 27 and connect.
3, fuel pump according to claim 1 and 2 is characterized by that said medium-tight structure is to have a road sealing groove on the outer circumferential face of back-up ring 24 in (8), in this groove rubber seal is housed; Or on the pump housing 4, open seal groove, in this groove, rubber seal is housed; Also can be covered with sealer on back-up ring 24 outer circumferential faces or on the pump housing 4 endoporus side faces.
4, fuel pump according to claim 1 is characterized by middle part at pump case 7, is positioned on the pump case 7 that drives cylinder body 6 places, is cast with the medium inner flow passage 21 of control pump temperature with the pump case one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87207320 CN87207320U (en) | 1987-07-21 | 1987-07-21 | Axial plunger fuel pump with a sloping cam plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87207320 CN87207320U (en) | 1987-07-21 | 1987-07-21 | Axial plunger fuel pump with a sloping cam plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN87207320U true CN87207320U (en) | 1988-03-09 |
Family
ID=4822770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87207320 Expired - Lifetime CN87207320U (en) | 1987-07-21 | 1987-07-21 | Axial plunger fuel pump with a sloping cam plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN87207320U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406724C (en) * | 2001-08-03 | 2008-07-30 | 韩国机械研究院 | Tilted variable axial piston device |
| CN101761464A (en) * | 2009-12-04 | 2010-06-30 | 威海华东数控股份有限公司 | Axial variable plunger pump |
| CN102213204A (en) * | 2011-05-23 | 2011-10-12 | 西安交通大学 | Variable device for diacytic-type axial plunger bidirectional variable pump |
| CN102425539A (en) * | 2011-12-13 | 2012-04-25 | 合肥工业大学 | Stroke adjusting device for metering pump |
| CN104685208A (en) * | 2013-03-29 | 2015-06-03 | 萱场工业株式会社 | Opposed swashplate-type hydraulic rotary machine |
| CN107084107A (en) * | 2017-06-22 | 2017-08-22 | 杭州力龙液压有限公司 | A kind of electronic sensor control plate variable plunger pump, hydraulic planger pump |
| CN110748479A (en) * | 2018-07-06 | 2020-02-04 | 合肥宇创液压件有限公司 | Hydraulic oil pump for engineering machinery |
-
1987
- 1987-07-21 CN CN 87207320 patent/CN87207320U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100406724C (en) * | 2001-08-03 | 2008-07-30 | 韩国机械研究院 | Tilted variable axial piston device |
| CN101761464A (en) * | 2009-12-04 | 2010-06-30 | 威海华东数控股份有限公司 | Axial variable plunger pump |
| CN102213204A (en) * | 2011-05-23 | 2011-10-12 | 西安交通大学 | Variable device for diacytic-type axial plunger bidirectional variable pump |
| CN102425539A (en) * | 2011-12-13 | 2012-04-25 | 合肥工业大学 | Stroke adjusting device for metering pump |
| CN102425539B (en) * | 2011-12-13 | 2014-04-30 | 合肥工业大学 | Stroke adjusting device for metering pump |
| CN104685208A (en) * | 2013-03-29 | 2015-06-03 | 萱场工业株式会社 | Opposed swashplate-type hydraulic rotary machine |
| CN107084107A (en) * | 2017-06-22 | 2017-08-22 | 杭州力龙液压有限公司 | A kind of electronic sensor control plate variable plunger pump, hydraulic planger pump |
| CN107084107B (en) * | 2017-06-22 | 2019-10-18 | 杭州力龙液压有限公司 | A kind of electronic sensor control plate variable plunger pump, hydraulic planger pump |
| CN110748479A (en) * | 2018-07-06 | 2020-02-04 | 合肥宇创液压件有限公司 | Hydraulic oil pump for engineering machinery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |