CN105864040B - The oval gear pump of oval gear speed changer driving - Google Patents

The oval gear pump of oval gear speed changer driving Download PDF

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Publication number
CN105864040B
CN105864040B CN201610288803.0A CN201610288803A CN105864040B CN 105864040 B CN105864040 B CN 105864040B CN 201610288803 A CN201610288803 A CN 201610288803A CN 105864040 B CN105864040 B CN 105864040B
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China
Prior art keywords
oval gear
oval
gear
speed changer
active
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CN201610288803.0A
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Chinese (zh)
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CN105864040A (en
Inventor
刘大伟
杨文华
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Taizhou Jinfujia Machinery Co ltd
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Yanshan University
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/001Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C23/00Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
    • F04C23/02Pumps characterised by combination with or adaptation to specific driving engines or motors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04CROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/0042Driving elements, brakes, couplings, transmissions specially adapted for pumps
    • F04C29/005Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions

Abstract

The oval gear pump of oval gear speed changer driving, mainly including motor, speed changer and oval gear pump.Wherein, oval gear speed changer is provided between motor and oval gear pump, motor is connected by shaft coupling A with oval gear speed changer, and oval gear speed changer is connected by shaft coupling B with oval gear pump.The present invention is by simple in construction, and easy for installation, manufacturing cost is low, and flow is more uniform;Significant effect raising is stabilized in pulsation.

Description

The oval gear pump of oval gear speed changer driving
Technical field
The invention belongs to Fluid-transmission field, and in particular to a kind of oval gear pump of huge discharge low pulse.
Background technology
Oval gear pump uses the oval gears of a pair of conjugation as rotor, when the timing of pump inner chamber radius one, oval gear The discharge capacity of the relatively common knuckle-tooth wheel pump of pump, can increase more than 4 times, therefore be a kind of high-performance pump of huge discharge lightweight.But Flow pulsation while discharge capacity increases of oval gear pump also increases therewith, causes its vibration and noise to greatly improve, Wu Fazheng Often application, therefore flow pulsation is effectively stabilized as the practical key issue of oval gear pump is restricted.
Tan Weiming etc., by two oil-discharging cavity flows complementations, is made total defeated using the structure of three elliptic gear rotor inlines Outflow pulsation reduces;In addition, he is also proposed the scheme of two oval gear parallels connection of pumps, its essence is also to pass through flow complementation Effect is stabilized in realization, and both approaches can also increase discharge capacity while reducing and pulsing, the performance boost tool to elliptic gear pump There is positive meaning, but after the new rotor of introducing, pump configuration becomes complicated, and manufacture difficulty increases, and overall weight also rises therewith.
Woods is superfine to propose high-order ellipse conical gear pump, finds the pump relative to Cylinder Gear wheel pump and non-cylindrical by contrasting The discharge capacity of gear pump is maximum, but its flow pulsation is not stabilized.
In addition, people are directed to common knuckle-tooth wheel pump, propose by changing the number of teeth, pressure angle, tooth higher geometry parameter Or the flow pulsation of gear pump, but oval gear pump are reduced using the method for the special tooth profiles such as curved tooth, helical teeth and asymmetric tooth Pulsation be mainly derived from the pitch curve shape of avette rotor, the effect of these methods will be extremely limited.
The content of the invention
It is an object of the invention to provide a kind of oval gear pump of oval gear speed changer driving, do not changing pump body structure On the premise of, the instantaneous delivery pulsation of oval gear pump is significantly stabilized, realizes that huge discharge is stable and exports, and then effectively suppress the pump housing Vibration and noise.
The invention mainly comprises motor, speed changer and oval gear pump.Wherein, ovum is provided between motor and oval gear pump Shape gear-shift mechanism, motor are connected by shaft coupling A with oval gear speed changer, oval gear speed changer by shaft coupling B with Oval gear pump is connected.The output shaft of motor is connected with shaft coupling A one end, shaft coupling the A other end and oval gear speed change The input shaft of device is connected, and the input shaft of oval gear speed changer is connected with active oval gear by key, active oval gear with Driven oval gear intermeshing, active oval gear is placed in the inside of case of transmission with driven oval gear, driven avette Gear is connected by key with the output shaft of oval gear speed changer, input shaft, the oval gear speed changer of oval gear speed changer Output shaft, active oval gear, driven oval gear and case of transmission composition speed changer.The output of oval gear speed changer Axle is connected with shaft coupling B one end, and the shaft coupling B other end is connected with the input shaft of gear pump, the input shaft of gear pump with Active oval gear rotor is intermeshed by key connection, active oval gear rotor with driven oval gear rotor, active ovum Shape gear rotor is placed in the enclosure interior of gear pump with driven oval gear rotor.The input shaft of oval gear pump, active are avette Gear rotor, driven oval gear rotor and oval gear pump case composition oval gear pump.
Active oval gear rotor and driven oval gear rotor, its pitch curve equation in oval gear pump are:
In formula, e1For the eccentricity of oval gear rotor, a1For the standard shaft of oval gear rotor pitch curve,For active ovum The corner of shape gear rotor, r1、r2Respectively the pitch curve of active oval gear rotor and driven oval gear rotor is main to footpath Dynamic oval gear is arranged on the input shaft of oval gear pump.
Active oval gear and driven oval gear, its pitch curve equation in speed changer are:
In formula, e2For the eccentricity of oval gear, a2For the standard shaft of oval gear pitch curve,For active oval gear Corner, r3、r4The respectively pitch curve of active oval gear and driven oval gear is to footpath.
The major axis of the major axis and driven oval gear of active oval gear rotor is parallel to each other;Eccentric ratio e2Span is 0.4e1~0.6e1
In some embodiments, the oval gear in oval gear speed changer is connected with a pair of knuckle-tooth wheel sets, Knucle-gear Driven gear in pair is fixed on a shaft with oval gear, and the driving gear in knuckle-tooth wheel set is fixed on the input of speed changer On axle.
Compared with prior art, the beneficial effects of the invention are as follows:
The present invention drives oval gear to turn on the basis of pump body structure is not changed, by a pair of external oval gear mechanisms Sub- speed change rotates and realizes that flow pulsation is stabilized, and by the mode of two oval gear parallels connection of pumps, simple in construction, installation side of the invention Just, manufacturing cost is low, and flow is more uniform;Compared with the methods of changing the geometric parameter or tooth form of oval gear rotor, Significant effect raising is stabilized in the pulsation of the present invention.
Brief description of the drawings
Fig. 1 is the oval gear pump machanism sketch of oval gear speed changer driving;
The sectional view of Fig. 2 oval gear pumps
The pitch curve of oval gear in Fig. 3 speed changers and gear pump
Fig. 4 is gear pump rotor eccentricity rate e1Air-quantity chart when=0.2
Drawing reference numeral:1- active oval gear rotors;The driven oval gear rotors of 2-;3- active oval gears;4- is driven Oval gear;5- oval gear pumps;6- speed changers;7- shaft couplings A;8- motors;9- shaft couplings B;10- oval gear speed changers Input shaft;The output shaft of 11- oval gear speed changers;The input shaft of 12- gear pumps.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the present invention is further illustrated.
The oval gear pump concrete structure of oval gear speed changer driving is as shown in figure 1, between motor 8 and oval gear pump Provided with oval gear speed changer, motor is connected by shaft coupling A7 with oval gear speed changer, and oval gear speed changer passes through connection Axle device B9 is connected with oval gear pump.The output shaft of motor is connected with shaft coupling A one end, the shaft coupling A other end with it is avette The input shaft 10 of gear-shift mechanism is connected, and the input shaft of oval gear speed changer is connected with active oval gear 3 by key, actively Oval gear is intermeshed with driven oval gear 4, and active oval gear is placed in the interior of case of transmission with driven oval gear Portion, driven oval gear are connected by key with the output shaft 11 of oval gear speed changer, input shaft, the ovum of oval gear speed changer Output shaft, active oval gear, driven oval gear and the case of transmission composition speed changer 6 of shape gear-shift mechanism.Avette tooth The output shaft of wheel speed is connected with shaft coupling B9 one end, and the shaft coupling B other end is connected with the input shaft 12 of gear pump, ovum The input shaft of shape gear pump in active oval gear rotor 1 with passing through key connection, active oval gear rotor and driven avette tooth Wheel rotor 2 is intermeshed, and active oval gear rotor is placed in the enclosure interior of oval gear pump with driven oval gear rotor.Ovum Input shaft, active oval gear rotor, driven oval gear rotor and the gear pump case composition oval gear pump of shape gear pump 5。
Active oval gear rotor and driven oval gear rotor in oval gear pump, its sectional view is as shown in Fig. 2 ovum The pitch curve equation of shape gear is
In formula, e1For the eccentricity of oval gear rotor, a1For the standard shaft of oval gear rotor pitch curve,For active ovum The corner of shape gear rotor, r1、r2Respectively the pitch curve of active oval gear rotor and driven oval gear rotor is main to footpath Dynamic oval gear is arranged on the input shaft of gear pump.In the present embodiment, the parameter of oval gear rotor is in gear pump:
The oval gear pump rotor parameter of table 1
Oval gear rotor 1 in the present embodiment, the data on 2 pitch curves can be calculated according to table 1 and formula 3, such as the institute of table 2 Show, oval gear rotor pitch curve is obtained as shown by the dotted line in fig. 3 with this.
Oval gear pitch curve data in the wheel pump of table 2
Active oval gear and driven oval gear, its pitch curve equation in speed changer are
In formula, e2For the eccentricity of oval gear, a2For the standard shaft of oval gear pitch curve,For active oval gear Corner, r3、r4The respectively pitch curve of active oval gear and driven oval gear is to footpath.
In the present embodiment, the parameter of oval gear is in speed changer 6:
Oval gear parameter in the oval gear speed changer of table 3
Oval gear 3 in the present embodiment, the data on 4 pitch curves can be calculated according to table 2 and formula 4, as shown in table 4, Oval gear 3,4 pitch curves are obtained as shown by the dotted line in fig. 3 with this.
The pitch curve data of oval gear in the speed changer of table 4
In order that speed changer to gear pump to stabilize effect best, oval gear rotor and oval gear when mounted, Ensure that the pitch curve major axis of the two is parallel to each other, now the instantaneous delivery equation of oval gear pump is
In formula, q1The instantaneous delivery of oval gear pump during to there is speed changer, B be oval gear rotor width, ω3For electricity Machine rotating speed, r1For active oval gear rotor pitch curve to footpath, r3For active oval gear pitch curve to footpath, R is avette tooth Wheel pump inner chamber radius, a1For the standard shaft of oval gear rotor pitch curve, a2For the standard shaft of oval gear pitch curve.
During without oval gear speed changer, the instantaneous delivery formula of motor direct-drive oval gear pump is
In formula, q2The instantaneous delivery of oval gear pump during for without speed changer, B be oval gear rotor width, ω3For electricity Machine rotating speed, r1For active oval gear rotor pitch curve to footpath, R is oval gear pump inner chamber radius, a1For oval gear rotor The standard shaft of pitch curve.
According to table 1, parameter and formula (5)-(6) in table 2, the instantaneous delivery data of oval gear pump can be obtained, such as the institute of table 5 Show, had with this, without speed changer when oval gear pump discharge curve, respectively as shown in curve a and curve b in Fig. 4.
The oval gear pump rotor e of table 51Instantaneous delivery (L/min) when=0.2
It can be seen that from the contrast in Fig. 4 after driving oval gear pump by oval gear speed changer, its instantaneous delivery arteries and veins Emotionally condition has obtained obvious improvement, from the root of fluid machinery solve flow pulsation the reason for, reduce pulsatile impact with Noise, be advantageous to the stabilization of mechanical system.

Claims (1)

1. the oval gear pump of oval gear speed changer driving, mainly including motor, speed changer and oval gear pump, oval gear The input shaft of pump in active oval gear rotor with passing through key connection, active oval gear rotor and driven oval gear rotor phase Mutually engagement, active oval gear rotor are placed in the enclosure interior of oval gear pump, oval gear pump with driven oval gear rotor Input shaft, active oval gear rotor, driven oval gear rotor and gear pump case composition oval gear pump, oval gear Active oval gear rotor and driven oval gear rotor, its pitch curve equation in pump are:
In formula, e1For the eccentricity of oval gear rotor, a1For the standard shaft of oval gear rotor pitch curve,For actively avette tooth Take turns the corner of rotor, r1、r2The respectively pitch curve of active oval gear rotor and driven oval gear rotor is to footpath, active ovum Shape gear is arranged on the input shaft of oval gear pump, it is characterised in that:Oval gear is provided between motor and oval gear pump Speed changer, motor are connected by shaft coupling A with oval gear speed changer, and oval gear speed changer passes through shaft coupling B and avette tooth Wheel pump is connected, and the output shaft of motor is connected with shaft coupling A one end, and the shaft coupling A other end is defeated with oval gear speed changer Enter axle to be connected, the input shaft of oval gear speed changer is connected with active oval gear by key, active oval gear and driven ovum Shape gear is intermeshed, and active oval gear is placed in the inside of case of transmission with driven oval gear, and driven oval gear leads to The output shaft that key is crossed with oval gear speed changer is connected, the output of the input shaft, oval gear speed changer of oval gear speed changer Axle, active oval gear, driven oval gear and case of transmission composition speed changer, the output shaft and connection of oval gear speed changer Axle device B one end is connected, and the shaft coupling B other end is connected with the input shaft of gear pump, the active ovum in oval gear speed changer Shape gear and driven oval gear, pitch curve equation are:
In formula, e2For the eccentricity of oval gear, a2For the standard shaft of oval gear pitch curve,For the corner of active oval gear, r3、r4The respectively pitch curve of active oval gear and driven oval gear is to footpath;The standard shaft of active oval gear rotor with it is driven The standard shaft of oval gear is parallel to each other;Eccentric ratio e2Span is 0.4e1~0.6e1
CN201610288803.0A 2016-04-29 2016-04-29 The oval gear pump of oval gear speed changer driving Active CN105864040B (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201610288803.0A CN105864040B (en) 2016-04-29 2016-04-29 The oval gear pump of oval gear speed changer driving

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CN105864040B true CN105864040B (en) 2018-01-23

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Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108061032B (en) * 2017-11-21 2019-02-22 燕山大学 Pulse free high order elliptic gear pump
CN108087264B (en) * 2017-11-21 2019-04-09 燕山大学 Pulse free high-order oval convex wheel pump
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

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5076468A (en) * 1973-09-10 1975-06-23
JPS566090A (en) * 1979-06-26 1981-01-22 Akitoshi Kitano Pumping device
JPS6030412A (en) * 1983-07-29 1985-02-16 Isuzu Motors Ltd Oil pump
CN101328887A (en) * 2008-07-06 2008-12-24 邹伟明 Elliptic gear pump
US9022761B2 (en) * 2012-08-22 2015-05-05 Roper Pump Company Elliptical gear pump fluid driving apparatus

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Effective date of registration: 20201214

Address after: Room 1518, 15 / F, investment building, 1757 Tushan East Road, Bengbu City, Anhui Province

Patentee after: Bengbu Jingtu Intelligent Technology Co.,Ltd.

Address before: 066004 No. 438 west section of Hebei Avenue, seaport District, Hebei, Qinhuangdao

Patentee before: Yanshan University

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Effective date of registration: 20231226

Address after: 318000 East side of Shangma Qiming Road, Shitang Town, Wenling City, Taizhou City, Zhejiang Province

Patentee after: TAIZHOU JINFUJIA MACHINERY Co.,Ltd.

Address before: Room 1518, 15 / F, investment building, 1757 Tushan East Road, Bengbu City, Anhui Province

Patentee before: Bengbu Jingtu Intelligent Technology Co.,Ltd.

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