CN104564660A - Low-pulse compound gear pump - Google Patents
Low-pulse compound gear pump Download PDFInfo
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- CN104564660A CN104564660A CN201510022141.8A CN201510022141A CN104564660A CN 104564660 A CN104564660 A CN 104564660A CN 201510022141 A CN201510022141 A CN 201510022141A CN 104564660 A CN104564660 A CN 104564660A
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- gear
- flat key
- sliding bearing
- pump housing
- pump
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Abstract
The invention relates to a low-pulse compound gear pump. The low-pulse compound gear pump comprises a pump body, wherein the pump body is connected with a front end mounting plate and a rear end cover plate by virtue of connection bolts; the pump body is internally provided with a driving shaft and a driven shaft; a first gear and a third gear are mounted on the driving shaft by virtue of a flat key; a second gear and a fourth gear are mounted on the driven shaft by virtue of the flat key; the first gear and the second gear are meshed with each other to form a first meshed gear pair; the third gear and the fourth gear are meshed with each other to form a second meshed gear pair; a front terminal plate, a rear terminal plate and a partition plate are respectively mounted on the front end, the rear end and the middle part of the two pairs of meshed gear pairs; sliding bearings are mounted on the front terminal plate, the partition plate and the rear terminal plate; a sliding bearing is arranged on the front end mounting plate; the driving shaft stretches out of the pump body and is connected with an external motor by virtue of the flat key. The low-pulse compound gear pump has the characteristics of simple structure, insensitivity to the oil pollution, high working pressure and low pressure pulse of an oil outlet.
Description
Technical field
The present invention relates to a kind of low pulse compound gear pump.
Background technique
In all kinds of oil hydraulic pump, external gear pump is simple with structure, and working efficiency is high, stable and be used widely, compared with other pumps, the flow pulsation of external gear pump is large, cause system pressure to be pulsed large, this reason limits the application area of external gear pump.Existing external gear pump only has a pair gear to engage each other, gear is involute gear, when gear at the uniform velocity rotates, oil drain out will produce the flow crest and trough with stable alternately Changing Pattern, and according to this feature, the present invention is in a pump housing, design two pairs of pitch wheels, separate with dividing plate between two pairs of gears, the crest of a pair gear wheel flow-rate and another are superposed the trough of gear wheel flow-rate, thus makes discharge flow rate keep stable as far as possible.
Summary of the invention
The object of the invention is to the defect existed for prior art, a kind of low pulse compound gear pump is provided, this oil hydraulic pump can be passed through, simple at guarantee gear pump structure, operational efficiency is high, when the high requirement of working pressure, effectively reduces the pressure pulsation of gear pump, effective reduction System noise, thus make the hydraulic work system that is made up of gear pump more stable.
For achieving the above object, design of the present invention is: by the position that two pairs of pitch wheels are distributed on axle, the half tooth that staggers in a circumferential direction is apart from corresponding angle, the two shares an inlet port, share an oil drain out, carried out superposing thus process of finishing the work before high pressure oil ejects from the pump housing.
According to foregoing invention design, the present invention adopts following technical proposals:
A kind of low pulse compound gear pump, comprise a pump housing, the described pump housing is connected by connecting bolt with between front end mounting plate and rear-end plate, the described pump housing is built with driving shaft and driven shaft, described driving shaft installs the first gear and the 3rd gear by flat key, and described driven shaft installs the second gear and the 4th gear by flat key; Described first gear and the second gear engage each other, form the first engaging gear pair, described 3rd gear and the 4th gear engage each other, form the second engaging gear pair, in the right rear and front end of the two pairs of engaging gears and centre, front end daughter board, rear terminal board and dividing plate are installed respectively, described front end daughter board and rear terminal board play the effect of sealing, and dividing plate two gear mesh separately; Described front end daughter board is installed the first sliding bearing and the second sliding bearing, described dividing plate installs the 3rd sliding bearing and the 4th sliding bearing, described rear terminal board installs the 5th sliding bearing and the 6th sliding bearing, described front end mounting plate there is the 7th sliding bearing, described driving shaft stretches out outside the pump housing, connects external motor by flat key.
Two engaging gears are to the half tooth that staggers in a circumferential direction apart from corresponding angle, thus the crest of the flow that two pairs of gears are discharged when engaging and trough superpose mutually, and then make the pressure oil flow pulsation of discharging from pump minimum.
Described pump body shape is upper and lower two ends is circles that diameter is identical, and gear closely cooperates, and to be circle that diameter is larger circular with upper and lower two in centre intersects, and the both sides of large circle have inlet port and oil drain out.
Described front end daughter board is identical with rear terminal board shape, and its shape is identical with pump body shape, is formed closely cooperate with pump housing inner chamber, and in the middle of the daughter board of two ends, upper-lower position has through hole, for installing sliding bearing.
The shape of described dividing plate is the figure of eight, upper and lower two ends are identical with pump housing inner chamber upper and lower end shape, level and smooth gap is had between the left and right sides and pump housing inner chamber, for the oil sucting cavity that composition that oil sucting cavity right for two engaging gears is connected together shares, oil-discharging cavity is connected together the oil-discharging cavity that composition shares.
Described driving shaft has three flat key grooves, the angle that the flat key groove of two installation gears staggers in a circumferential direction is mutually consistent apart from corresponding angle with the half tooth that staggers during two pairs of gears meshing work, ensures the accuracy of gear mounting point.
Described driven shaft has two flat key grooves, the half tooth that staggers when the angle that two flat key grooves stagger in a circumferential direction mutually and two pairs of gears meshing work is consistent apart from corresponding angle, the accuracy of guarantee gear mounting point.
Compared with prior art, the present invention has following outstanding substantive distinguishing features and significant advantage:
The present invention's two pairs of pitch wheels, in a circumferential direction, the half tooth that mutually staggers is apart from corresponding angle, centre is separated by dividing plate, share an inlet port, share an oil outlet, pressure oil merged before going out pumping hole, the crest of pulsation and trough superposition, high pressure oil after fusion discharges the pump housing, the flow pulsation of obvious reduction gear pump, effective reduction System noise, thus make the hydraulic work system that is made up of gear pump more stable, there is structure simple, insensitive to oil pollution, working pressure is high, the feature that the pressure pulsation of oil outlet is little.
Accompanying drawing explanation
Fig. 1 is the general assembly drawing of low pulse compound gear pump, and (a) is plan view, (b) for B to direction view.
Fig. 2 is the A-A cross-sectional view in Fig. 1.
Fig. 3 is pump body structure figure, and (a) is plan view, (b) left view.
Fig. 4 is front end and back end substructure figure, (a) plan view, and (b) is left view.
Fig. 5 is diaphragm structure figure, (a) plan view, and (b) is left view.
Fig. 6 is driving shaft structural drawing, (a) plan view, and (b) is plan view.
Fig. 7 is driven shaft structural drawing, (a) plan view, (b) plan view.
Fig. 8 is the three-dimensional shaft side figure of low pulse compound gear pump.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are described further:
As shown in Figure 1, Figure 2 with shown in Fig. 8, a kind of low pulse compound gear pump, comprise a pump housing 10, the described pump housing 10 is connected by connecting bolt 9 with between front end mounting plate 1 and rear-end plate 2, the described pump housing 10 is built with driving shaft 14 and driven shaft 19, described driving shaft 14 installs the first gear 5 and the 3rd gear 16 by flat key, and described driven shaft 19 installs the second gear 6 and the 4th gear 17 by flat key; Described first gear 5 and the second gear 6 engage each other, form the first engaging gear pair, described 3rd gear 16 and the 4th gear 17 engage each other, form the second engaging gear pair, in the right rear and front end of the two pairs of engaging gears and centre, front end daughter board 20, rear terminal board 3 and dividing plate 11 are installed respectively, described front end daughter board 20 and rear terminal board 3 play the effect of sealing, and dividing plate 11 two gear mesh separately; Described front end daughter board 20 is installed the first sliding bearing 12 and the second sliding bearing 18, described dividing plate 11 installs the 3rd sliding bearing 13 and the 4th sliding bearing 7, described rear terminal board 3 installs the 5th sliding bearing 4 and the 6th sliding bearing 8, described front end mounting plate 1 there is the 7th sliding bearing 15, described driving shaft 14 stretches out outside the pump housing 10, connects external motor by flat key.
Two engaging gears are to the half tooth that staggers in a circumferential direction apart from corresponding angle, thus the crest of the flow that two pairs of gears are discharged when engaging and trough superpose mutually, and then make the pressure oil flow pulsation of discharging from pump minimum.
As shown in Figure 3, the described pump housing 10 interior shape is upper and lower two ends is circles that diameter is identical, and gear closely cooperates, and to be circle that diameter is larger circular with upper and lower two in centre intersects, and the both sides of large circle have inlet port and oil drain out.
As shown in Figure 4, described front end daughter board 20 is identical with rear terminal board 3 shape, and its shape is identical with the pump housing 10 interior shape, is formed closely cooperate with the pump housing 10 inner chamber, and in the middle of the daughter board of two ends, upper-lower position has through hole, for installing sliding bearing.
As shown in Figure 5, the shape of described dividing plate 11 is the figure of eight, upper and lower two ends are identical with the pump housing 10 inner chamber upper and lower end shape, level and smooth gap is had between the left and right sides and the pump housing 10 inner chamber, for the oil sucting cavity that composition that oil sucting cavity right for two engaging gears is connected together shares, oil-discharging cavity is connected together the oil-discharging cavity that composition shares.
As shown in Figure 6, described driving shaft 14 has three flat key grooves, the angle that the flat key groove of two installation gears staggers in a circumferential direction is mutually consistent apart from corresponding angle with the half tooth that staggers during two pairs of gears meshing work, ensures the accuracy of gear mounting point.
As shown in Figure 7, described driven shaft 19 has two flat key grooves, the half tooth that staggers when the angle that two flat key grooves stagger in a circumferential direction mutually and two pairs of gears meshing work is consistent apart from corresponding angle, the accuracy of guarantee gear mounting point.
Claims (7)
1. a low pulse compound gear pump, comprise a pump housing (10), it is characterized in that, the described pump housing (10) is connected by connecting bolt (9) with between front end mounting plate (1) and rear-end plate (2), the described pump housing (10) is built with driving shaft (14) and driven shaft (19), described driving shaft (14) installs the first gear (5) and the 3rd gear (16) by flat key, and described driven shaft (19) installs the second gear (6) and the 4th gear (17) by flat key; Described first gear (5) and the second gear (6) engage each other, form the first engaging gear pair, described 3rd gear (16) and the 4th gear (17) engage each other, form the second engaging gear pair, in the right rear and front end of the two pairs of engaging gears and centre, front end daughter board (20), rear terminal board (3) and dividing plate (11) are installed respectively, described front end daughter board (20) and rear terminal board (3) play the effect of sealing, and dividing plate (11) two gear mesh separately; Upper installation first sliding bearing (12) in described front end daughter board (20) and the second sliding bearing (18), the upper installation the 3rd sliding bearing (13) of described dividing plate (11) and the 4th sliding bearing (7), the upper installation the 5th sliding bearing (4) of described rear terminal board (3) and the 6th sliding bearing (8), described front end mounting plate (1) there is the 7th sliding bearing (15), described driving shaft (14) stretches out outside the pump housing (10), connects external motor by flat key.
2. low pulse compound gear pump according to claim 1, it is characterized in that, two engaging gears are to the angle of half tooth apart from correspondence that stagger in a circumferential direction, thus the crest of flow making two pairs of gears discharge when engaging and trough superpose mutually, and then make the pressure oil flow pulsation of discharging from pump minimum.
3. low pulse compound gear pump according to claim 1, it is characterized in that, the described pump housing (10) interior shape is upper and lower two ends is circles that diameter is identical, closely cooperate with gear, to be circle that diameter is larger circular with upper and lower two in centre intersects, and the both sides of large circle have inlet port and oil drain out.
4. low pulse compound gear pump according to claim 1, it is characterized in that, described front end daughter board (20) is identical with rear terminal board (3) shape, its shape is identical with the pump housing (10) interior shape, formed with the pump housing (10) inner chamber and closely cooperate, in the middle of the daughter board of two ends, upper-lower position has through hole, for installing sliding bearing.
5. low pulse compound gear pump according to claim 1, it is characterized in that, the shape of described dividing plate (11) is the figure of eight, upper and lower two ends are identical with the pump housing (10) inner chamber upper and lower end shape, level and smooth gap is had between the left and right sides and the pump housing (10) inner chamber, for the oil sucting cavity that composition that oil sucting cavity right for two engaging gears is connected together shares, oil-discharging cavity is connected together the oil-discharging cavity that composition shares.
6. low pulse compound gear pump according to claim 1, it is characterized in that, described driving shaft (14) has three flat key grooves, the angle that the flat key groove of two installation gears staggers in a circumferential direction is mutually consistent apart from corresponding angle with the half tooth that staggers during two pairs of gears meshing work, ensures the accuracy of gear mounting point.
7. low pulse compound gear pump according to claim 1, it is characterized in that, described driven shaft (19) has two flat key grooves, the half tooth that staggers when the angle that two flat key grooves stagger in a circumferential direction mutually and two pairs of gears meshing work is consistent apart from corresponding angle, the accuracy of guarantee gear mounting point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510022141.8A CN104564660A (en) | 2015-01-16 | 2015-01-16 | Low-pulse compound gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510022141.8A CN104564660A (en) | 2015-01-16 | 2015-01-16 | Low-pulse compound gear pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104564660A true CN104564660A (en) | 2015-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510022141.8A Pending CN104564660A (en) | 2015-01-16 | 2015-01-16 | Low-pulse compound gear pump |
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| CN (1) | CN104564660A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894991A (en) * | 2017-05-05 | 2017-06-27 | 皮桂庆 | A kind of gear pump of misphase gear collocation structure |
| CN109630406A (en) * | 2018-12-19 | 2019-04-16 | 安徽理工大学 | A kind of double planetary gear pump in parallel |
| CN111350659A (en) * | 2020-03-06 | 2020-06-30 | 中国北方车辆研究所 | Coaxial pump set double-pump confluence working condition flow pulsation phase complementation structure |
| CN111417782A (en) * | 2017-12-27 | 2020-07-14 | Ｋｙｂ株式会社 | Electro-hydraulic actuator |
| CN114017158A (en) * | 2021-11-24 | 2022-02-08 | 中国航发沈阳发动机研究所 | Method for reducing oil supply fluctuation of aviation lubricating oil pump and aviation lubricating oil pump |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042121U (en) * | 1988-10-03 | 1989-08-02 | 西安矿业学院 | Low-pulsation and low-noise gear pump |
| CN2069040U (en) * | 1990-03-03 | 1991-01-09 | 广东工学院 | Multi-disc type gear pump |
| CN2172360Y (en) * | 1993-05-27 | 1994-07-20 | 程安强 | Middle-saeled gear pump |
| CN2312349Y (en) * | 1997-12-01 | 1999-03-31 | 程安强 | Floating shaft type gear pump having side plate |
| CN1544814A (en) * | 2003-11-24 | 2004-11-10 | 大连铁道学院 | Medium-high pressure gear pump having asymmetric double-circular-arc gear shape |
| CN2677666Y (en) * | 2003-12-12 | 2005-02-09 | 范庆益 | Flow stablized multi high-pressure gear pump |
| CN101608618A (en) * | 2008-06-20 | 2009-12-23 | 安徽理工大学 | A kind of novel gear pump of composite gear type |
| RU115840U1 (en) * | 2011-11-16 | 2012-05-10 | ФГОУ ВПО Волгоградская государственная сельскохозяйственная академия | GEAR PUMP WITH REDUCED PRESSURE REDUCTION |
-
2015
- 2015-01-16 CN CN201510022141.8A patent/CN104564660A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2042121U (en) * | 1988-10-03 | 1989-08-02 | 西安矿业学院 | Low-pulsation and low-noise gear pump |
| CN2069040U (en) * | 1990-03-03 | 1991-01-09 | 广东工学院 | Multi-disc type gear pump |
| CN2172360Y (en) * | 1993-05-27 | 1994-07-20 | 程安强 | Middle-saeled gear pump |
| CN2312349Y (en) * | 1997-12-01 | 1999-03-31 | 程安强 | Floating shaft type gear pump having side plate |
| CN1544814A (en) * | 2003-11-24 | 2004-11-10 | 大连铁道学院 | Medium-high pressure gear pump having asymmetric double-circular-arc gear shape |
| CN2677666Y (en) * | 2003-12-12 | 2005-02-09 | 范庆益 | Flow stablized multi high-pressure gear pump |
| CN101608618A (en) * | 2008-06-20 | 2009-12-23 | 安徽理工大学 | A kind of novel gear pump of composite gear type |
| RU115840U1 (en) * | 2011-11-16 | 2012-05-10 | ФГОУ ВПО Волгоградская государственная сельскохозяйственная академия | GEAR PUMP WITH REDUCED PRESSURE REDUCTION |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106894991A (en) * | 2017-05-05 | 2017-06-27 | 皮桂庆 | A kind of gear pump of misphase gear collocation structure |
| CN111417782A (en) * | 2017-12-27 | 2020-07-14 | Ｋｙｂ株式会社 | Electro-hydraulic actuator |
| CN111417782B (en) * | 2017-12-27 | 2022-03-29 | Ｋｙｂ株式会社 | Electro-hydraulic actuator |
| CN109630406A (en) * | 2018-12-19 | 2019-04-16 | 安徽理工大学 | A kind of double planetary gear pump in parallel |
| CN111350659A (en) * | 2020-03-06 | 2020-06-30 | 中国北方车辆研究所 | Coaxial pump set double-pump confluence working condition flow pulsation phase complementation structure |
| CN114017158A (en) * | 2021-11-24 | 2022-02-08 | 中国航发沈阳发动机研究所 | Method for reducing oil supply fluctuation of aviation lubricating oil pump and aviation lubricating oil pump |
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Application publication date: 20150429 |
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