CN108087264B - Pulse free high-order oval convex wheel pump - Google Patents
Pulse free high-order oval convex wheel pump Download PDFInfo
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- CN108087264B CN108087264B CN201711165576.3A CN201711165576A CN108087264B CN 108087264 B CN108087264 B CN 108087264B CN 201711165576 A CN201711165576 A CN 201711165576A CN 108087264 B CN108087264 B CN 108087264B
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- high order
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2/00—Rotary-piston machines or pumps
- F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
- F04C15/0049—Equalization of pressure pulses
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
Abstract
Pulse free high-order oval convex wheel pump, it mainly include motor, speed changer and lobe pump three parts composition, lobe pump is made of high-order elliptic cam rotor A, high-order elliptic cam rotor B, high order elliptic gear pump driving shaft, high order elliptic gear pump driven shaft, active synchronization high order elliptic gear, driven synchronous high order elliptic gear and the pump housing, speed changer is made of active non-circular gear, driven non-circular gear, transmission input shaft, transmission output shaft and case of transmission, and one end of transmission input shaft is connected by shaft coupling B with the output shaft of motor.The present invention is not on the basis of changing pump body structure, the rotation of high-order elliptic cam rotor speed change is driven to realize that flow pulsation is stabilized by a pair of external non-circular gear mechanism, compared with traditional gear pump, present invention discharge capacity under pump chamber internal diameter and the identical situation of input speed is bigger；Compared with cycloid rotor pump, rotor of the invention is more readily processed；Compared with eccentric creeping motion type impeller pump, instantaneous flow of the invention is more steady.
Description
Technical field
The invention belongs to Fluid-transmission fields, and in particular to a kind of high-order oval convex wheel pump of huge discharge pulse free.
Background technique
High-order oval convex wheel pump is using the high-order elliptic cam of a pair of of conjugation as rotor, and when pumping, cavity radius is certain
When, the discharge capacity of the relatively common knuckle-tooth wheel pump of high-order oval convex wheel pump can increase 4 times or more, meanwhile, compared to common circle
Camber rotor cam pump, high-order oval cam pump rotor shape are more readily processed.But high-order oval convex wheel pump increases in discharge capacity
Greatly, flow pulsation also increases with it while easy to process, cause its vibration and noise greatly improve, can not normal use, because
This, which effectively stabilizes flow pulsation, becomes the critical issue for restricting the functionization of high-order oval convex wheel pump.
Zhang Jun proposes a kind of Some Second Order Elliptic impeller pump, gives the working principle and structural principle of elliptic rotor pump
Figure, and be compared with other common impeller pumps, show that the pump has the characteristics that flow is big, there are larger flow pulsation, but simultaneously
It does not propose how to stabilize flow pulsation.
Tan Weiming etc. is in order to stabilize the method that the flow pulsation of elliptic rotor pump uses flow complementation, including three ellipses
Rotor series connection and two oval rotor are in parallel, and both methods can also increase discharge capacity while reducing pulsation, to oval convex
The performance boost of wheel pump has positive meaning, but after the new rotor of introducing, pump configuration becomes complicated, and manufacture difficulty increases, whole
Weight also rises with it, and internal leakage is consequently increased.
Yang Guolai etc. studies arc impeller pump, establishes the math equation of molded lines of rotor, but due to molded line side
Journey brings certain inconvenience to processing for piecewise function.
In addition to this, people also proposed elliptic gear impeller pump, gerotor type impeller pump, eccentric creeping motion type impeller pump etc. its
The impeller pump of his type, but all there is flow pulsation, processing is inconvenient and volumetric efficiency is not high the disadvantages of.
Summary of the invention
The object of the present invention is to provide a kind of high-order oval convex wheel pumps of non-circular gear speed changer driving, are not changing pump
Under the premise of body structure, the instantaneous flow pulsation of high-order oval convex wheel pump is substantially stabilized, realizes that huge discharge stablizes output, in turn
Effectively inhibit vibration and the noise of the pump housing.
It include a pair of identical height in high order elliptic gear pump the invention mainly comprises motor and high-order oval convex wheel pump
Rank elliptic cam rotor, profile equation are as follows:
In formula, ε is the eccentricity of high-order elliptic cam rotor, and a is the standard shaft of high-order elliptic cam rotor pitch curve,For
The polar angle of high-order elliptic cam rotor A,For the polar angle of high-order elliptic cam rotor B, n is the order of high-order elliptic cam, r1、
r2Respectively the pitch curve of high-order elliptic cam rotor A and high-order elliptic cam rotor B are mounted on to diameter, high-order elliptic cam A
On the driving shaft of high-order oval convex wheel pump.
Synchromesh gear, the profile equation phase of the pitch curve and high-order elliptic cam rotor of synchromesh gear are housed on the outside of the pump housing
Together, active high order elliptic gear 1 is mounted on the driving shaft of high-order oval convex wheel pump, and longest is to diameter and high-order elliptic cam
The longest of rotor A is parallel to diameter；Driven high order elliptic gear is mounted on the driven shaft of high-order oval convex wheel pump, longest to
Diameter and the longest of high-order elliptic cam rotor B are parallel to diameter.
The high-order oval convex wheel pump of non-circular gear speed changer driving is mainly by motor, speed changer and lobe pump three parts group
At.Wherein, lobe pump is by high-order elliptic cam rotor A, high-order elliptic cam rotor B, high order elliptic gear pump driving shaft, high-order
Elliptic gear pump driven shaft, active synchronization high order elliptic gear, driven synchronous high order elliptic gear and pump housing composition, in the pump housing
Interior to be equipped with high order elliptic gear pump driving shaft and high order elliptic gear pump driven shaft, high-order elliptic cam rotor A and high-order are oval
Cam follower B is placed in pump body, and one end of high order elliptic gear pump driving shaft passes through high-order elliptic cam rotor A, and high-order is ellipse
One end of knuckle-tooth wheel pump driven shaft is socketed high-order elliptic cam rotor B, and one end of high order elliptic gear pump driving shaft and high-order are ellipse
One end of knuckle-tooth wheel pump driven shaft extends respectively to the outside of the pump housing, and active synchronization high order elliptic gear and driven synchronous high-order are ellipse
Knucle-gear is placed in outside the pump housing, intermeshing, and active synchronization high order elliptic gear is socketed on high order elliptic gear pump driving shaft,
Driven synchronous high order elliptic gear is socketed on high order elliptic gear pump driven shaft.One end of high order elliptic gear pump driving shaft is logical
Shaft coupling A is crossed to be connected with transmission output shaft.Speed changer is by active non-circular gear, driven non-circular gear, transmission input shaft, change
Fast device output shaft and case of transmission composition, transmission input shaft, transmission output shaft are placed in transmission case body, in speed change
Be socketed driven non-circular gear on device output shaft, be socketed active non-circular gear on transmission input shaft, and active non-circular gear and from
Dynamic non-circular gear is placed in the inside of speed changer, active non-circular gear and the intermeshing of driven non-circular gear, transmission input shaft
One end extend to the outside of case of transmission, one end of transmission input shaft is connected by shaft coupling B with the output shaft of motor.
Wherein there is a set of non-circular gear speed changer between motor and synchromesh gear, motor is become by shaft coupling and non-circular gear
The input shaft of fast device is connected, and the output shaft of non-circular gear speed changer passes through the driving shaft phase of shaft coupling and high-order oval convex wheel pump
Even, comprising a pair of intermeshing non-circular gear in non-circular gear speed changer, driving and driven non-circular gear is separately fixed at speed changer
Output and input on axis, the pitch curve equation of noncircular gear pair are as follows:
In formula, A be active non-circular gear and driven non-circular gear center away from,For turning for active non-circular gear gear 3
Angle,For the corner of driven non-circular gear 4, r3、r4The respectively pitch curve of active non-circular gear and driven non-circular gear to diameter,
i34For active non-circular gear, the transmission ratio of driven non-circular gear,Wherein, R is non-boss
Wheel pump cavity radius, a are the standard shaft of high-order elliptic cam rotor pitch curve, r1For the pitch curve of high-order elliptic cam rotor A 1'
Xiang Jing, ε are the eccentricity of high-order elliptic cam rotor.
In some embodiments, active non-circular gear is mounted on gear input shaft, driven non-circular gear installation
On gear output shaft, motor is connected with gear input shaft, gear output shaft and high-order oval cam
The driving shaft of pump is connected, and active non-circular gear is parallel to each other with the long axis on high order elliptic gear pitch curve.
Compared with prior art, the beneficial effects of the present invention are:
The present invention drives high-order ellipse convex on the basis of not changing pump body structure, through a pair of external non-circular gear mechanism
Wheel rotor speed change rotation realizes that flow pulsation is stabilized, and compared with traditional gear pump, the present invention is in pump chamber internal diameter and input speed
Discharge capacity is bigger in identical situation；Compared with cycloid rotor pump, rotor of the invention is more readily processed；With eccentric creeping motion type rotor
Pump is compared, and instantaneous flow of the invention is more steady.
Detailed description of the invention
Fig. 1 is the high-order oval cam pump machanism schematic diagram of non-circular gear speed changer driving；
Fig. 2 is the cross-sectional view of high-order oval convex wheel pump
Fig. 3 is the synchromesh gear of high-order oval convex wheel pump
Fig. 4 is the pitch curve of non-circular gear and high-order oval convex wheel pump synchromesh gear in speed changer
Fig. 5 is rotor of cam pump eccentric ratio e1Air-quantity chart when=0.2
Drawing reference numeral 1'- high-order elliptic cam rotor A；2'- high-order elliptic cam rotor B；1- active synchronization high-order is oval
Gear；The driven synchronous high order elliptic gear of 2-；3- active non-circular gear；The driven non-circular gear of 4-；5- high-order oval convex wheel pump
Driving shaft；6- high-order oval convex wheel pump driven shaft；The 7- pump housing；8- shaft coupling A；9- transmission input shaft；The output of 10- speed changer
Axis, 11- case of transmission, 12- shaft coupling B, 13- motor.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and embodiments.
The high-order oval convex wheel pump specific structure of non-circular gear speed changer driving is as shown in Figure 1, non-circular gear speed changer
The high-order oval convex wheel pump of driving is mainly by motor, speed changer and lobe pump three parts composition.Wherein, lobe pump is ellipse by high-order
Circle cam follower A1', high-order elliptic cam rotor B2', high order elliptic gear pump driving shaft 5, high order elliptic gear pump driven shaft
6, active synchronization high order elliptic gear 1, driven synchronous high order elliptic gear 2 and the pump housing 7 form, and it is ellipse that high-order is equipped in the pump housing
Knuckle-tooth wheel pump driving shaft 5 and high order elliptic gear pump driven shaft 6, high-order elliptic cam rotor A 1' and high-order elliptic cam rotor
B2' is placed in pump body, and one end of high order elliptic gear pump driving shaft 5 passes through high-order elliptic cam rotor A 1', high-order ellipse tooth
One end of wheel pump driven shaft 6 is socketed high-order elliptic cam rotor B2', and one end of high order elliptic gear pump driving shaft 5 and high-order are ellipse
One end of knuckle-tooth wheel pump driven shaft 6 extends respectively to the outside of the pump housing, active synchronization high order elliptic gear 1 and driven synchronous high-order
Elliptic gear 2 is placed in outside the pump housing, intermeshing, and active synchronization high order elliptic gear 1 is socketed in high order elliptic gear pump actively
On axis 5, driven synchronous high order elliptic gear 2 is socketed on high order elliptic gear pump driven shaft 6.High order elliptic gear pump driving shaft
5 one end is connected by shaft coupling A8 with transmission output shaft 10.Speed changer by active non-circular gear 3, driven non-circular gear 4,
Transmission input shaft 9, transmission output shaft 10 and case of transmission 11 form, transmission input shaft 9, transmission output shaft 10
It is placed in case of transmission 11, driven non-circular gear 4 is socketed on transmission output shaft, is socketed actively on transmission input shaft 9
Non-circular gear 3, and active non-circular gear and driven non-circular gear are placed in the inside of speed changer, active non-circular gear and driven non-
Knucle-gear intermeshing, one end of transmission input shaft extend to the outside of case of transmission, and one end of transmission input shaft is logical
Shaft coupling B12 is crossed to be connected with the output shaft of motor.
There is the identical high-order elliptic cam rotor of a pair of of shape in lobe pump, cross-sectional view is as shown in Fig. 2, pump outside has one
To synchromesh gear, synchromesh gear is pitch curve high order elliptic gear identical with high-order elliptic cam rotor profile, structure such as Fig. 3
It is shown.The equation of high-order elliptic cam rotor profile is
In formula, ε is the eccentricity of high-order elliptic cam rotor, and a is the standard shaft of high-order elliptic cam rotor pitch curve,For
The polar angle of high-order elliptic cam rotor 1',For the polar angle of high-order elliptic cam rotor 2', r1、r2Respectively high-order elliptic cam
The pitch curve of rotor 1' and high-order elliptic cam rotor 2' are mounted on the driving shaft of gear pump to diameter, high-order elliptic cam 1'.
In the present embodiment, the parameter of the high-order elliptic cam rotor in lobe pump are as follows:
1 high-order oval cam pump rotor parameter of table
High-order elliptic cam rotor 1 in the present embodiment, the data on 2 profiles can be calculated according to table 1 and formula 3, such as table 2
It is shown, high-order elliptic cam rotor profile is obtained as shown by the bold lines in fig with this.
High-order elliptic cam outline data in 2 wheel pump of table
Rotor in speed changer is a pair of of non-circular gear, and pitch curve equation is
In formula, A be active non-circular gear and driven non-circular gear center away from,For the polar angle of active non-circular gear 3,
For the polar angle of driven non-circular gear, r3For active non-circular gear 3 pitch curve to diameter, r4The pitch curve of driven non-circular gear is to diameter.
i34For the transmission ratio of active non-circular gear and driven non-circular gear,Wherein, R is that high-order is ellipse
Knuckle-tooth lobe pump cavity radius, a are the standard shaft of high-order elliptic cam rotor pitch curve, r1For high-order elliptic cam rotor A 1''s
For pitch curve to diameter, ε is the eccentricity of high-order elliptic cam rotor.
In the present embodiment, the parameter of non-circular gear in speed changer are as follows:
Non-circular gear parameter in 3 non-circular gear speed changer of table
It can be calculated in the present embodiment on the pitch curve of active non-circular gear and driven non-circular gear according to table 2 and formula 4
Data the center of active non-circular gear and driven non-circular gear is obtained away from the void in pitch curve such as Fig. 4 with this as shown in table 4
Shown in line.
The pitch curve data of non-circular gear in 4 speed changer of table
In order to make speed changer stabilize that effect is best, and active synchronization high order elliptic gear rotor 1 and A are driven non-to lobe pump
Knucle-gear is during installation, it is ensured that the pitch curve long axis of the two is parallel to each other, at this time the instantaneous flow side of high order elliptic gear pump
Cheng Wei
In formula, QiThe instantaneous flow of high-order oval convex wheel pump when to there is speed changer, B be high-order elliptic cam rotor 1',
The width of 2', ω11For motor speed, r1For high-order elliptic cam rotor 1' pitch curve to diameter, r2Turn for high-order elliptic cam
For the pitch curve of sub- 2' to diameter, R is high-order oval convex wheel pump cavity radius, i34For active non-circular gear and driven non-circular gear
Transmission ratio.
When without non-circular gear speed changer, the instantaneous flow formula of motor direct-drive high-order oval convex wheel pump is
In formula, qiThe instantaneous flow of high-order oval convex wheel pump when for no speed changer, B be high order elliptic gear rotor 1',
The width of 2', ω1For motor speed, r1For high-order elliptic cam rotor 1' pitch curve to diameter, r2For high-order elliptic cam rotor
For the pitch curve of 2' to diameter, R is high-order oval convex wheel pump cavity radius.
According to table 1, parameter and formula (5)-(6) in table 2 can obtain the instantaneous flow data of high-order oval convex wheel pump,
As shown in table 5, high-order oval cam pump discharge curve when being obtained with this with and without speed changer, respectively such as the curve a in Fig. 5
With shown in curve b.
5 high-order oval cam pump rotor e of table1Instantaneous flow (L/min) when=0.2
It can be seen that from the comparison in Fig. 5 after driving high-order oval convex wheel pump by non-circular gear speed changer, it is instantaneous
The reason of flow pulsation situation has obtained apparent improvement, and flow pulsation is solved from the root of fluid machinery, reduces pulsation
Impact and noise, are conducive to the stabilization of mechanical system.
Claims (1)
1. pulse free high order elliptic gear pump mainly includes motor, speed changer and gear pump, it is characterised in that: gear pump is by leading
Dynamic high order elliptic gear, driven high order elliptic gear, high order elliptic gear pump driving shaft, high order elliptic gear pump driven shaft and
Pump housing composition, is equipped with high order elliptic gear pump driving shaft and high order elliptic gear pump driven shaft in the pump housing, and active high-order is oval
Gear rotor and driven high order elliptic gear rotor are placed in the pump housing, intermeshing, and active high order elliptic gear rotor is located at
On high order elliptic gear pump driving shaft, driven high order elliptic gear rotor is located on high order elliptic gear pump driven shaft, and high-order is ellipse
One end of knuckle-tooth wheel pump driving shaft extends to the outside of the pump housing, passes through transmission output shaft one end phase of shaft coupling A and speed changer
Even, speed changer is by active non-circular gear, driven non-circular gear, transmission input shaft, transmission output shaft and case of transmission
Composition, transmission input shaft, transmission output shaft are placed in transmission case body, and driven non-knuckle-tooth is socketed on transmission output shaft
It takes turns, active non-circular gear is socketed on transmission input shaft, and active non-circular gear and driven non-circular gear are placed in speed changer
Inside, active non-circular gear and the intermeshing of driven non-circular gear, one end of transmission input shaft extends to case of transmission
One end of outside, transmission input shaft is connected by shaft coupling B with the output shaft of motor,
Identical high order elliptic gear rotor in the high order elliptic gear pump, pitch curve equation are as follows:
In formula, ε is the eccentricity of high order elliptic gear rotor, and a is the standard shaft of high order elliptic gear rotor pitch curve,For actively
The pitch curve polar angle of high order elliptic gear rotor,For the pitch curve polar angle of driven high order elliptic gear rotor, n is that high-order is oval
The order of gear, r1、r2The respectively pitch curve of active high order elliptic gear rotor and driven high order elliptic gear rotor to diameter,
Active high order elliptic gear is mounted on the input shaft of high order elliptic gear pump；
The pitch curve equation of noncircular gear pair in the speed changer are as follows:
In formula, A be active non-circular gear and driven non-circular gear center away from,For the pitch curve polar angle of active non-circular gear,For the pitch curve polar angle of driven non-circular gear, r3、r4The respectively pitch curve of active non-circular gear 3 and driven non-circular gear 4
Xiang Jing, i34For the transmission ratio of active non-circular gear and driven non-circular gear,Wherein, R is
Non-circular gear pumps cavity radius, and a is the standard shaft of high order elliptic gear rotor pitch curve, r1For active high order elliptic gear rotor
For pitch curve to diameter, ε is the eccentricity of high order elliptic gear rotor；
Active non-circular gear is mounted on gear input shaft, and driven non-circular gear is mounted on gear output shaft, electricity
Motivation is connected with gear input shaft, and gear output shaft is connected with high order elliptic gear pump input shaft, actively non-knuckle-tooth
Wheel is parallel to each other with the long axis on high order elliptic gear pitch curve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165576.3A CN108087264B (en) | 2017-11-21 | 2017-11-21 | Pulse free high-order oval convex wheel pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711165576.3A CN108087264B (en) | 2017-11-21 | 2017-11-21 | Pulse free high-order oval convex wheel pump |
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| CN108087264A CN108087264A (en) | 2018-05-29 |
| CN108087264B true CN108087264B (en) | 2019-04-09 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112630360B (en) * | 2020-12-14 | 2022-10-25 | 盐城工学院 | Four-phase cam pump for ion chromatograph |
| CN113586439B (en) * | 2021-07-19 | 2022-06-21 | 燕山大学 | Gear pump flow pulsation stabilizing method driven by non-circular gear in variable speed and gear pump |
| CN113464422B (en) * | 2021-07-19 | 2022-05-27 | 燕山大学 | Non-circular gear driven low-pulsation lobe pump |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS60182379A (en) * | 1984-02-29 | 1985-09-17 | Kinmon Seisakusho:Kk | Noncircular rotor |
| CN2908862Y (en) * | 2006-04-28 | 2007-06-06 | 严逸平 | Three-cam rotor pump |
| CN104963859A (en) * | 2015-07-30 | 2015-10-07 | 东莞市锐天机电科技有限公司 | Vane type cam air blower |
| CN105927534B (en) * | 2016-04-29 | 2017-12-29 | 燕山大学 | Three leaf-teeth wheel pumps of three leaf-teeth wheel speeds driving |
| CN105864040B (en) * | 2016-04-29 | 2018-01-23 | 燕山大学 | The oval gear pump of oval gear speed changer driving |
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