CN207513823U - A kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving - Google Patents
A kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving Download PDFInfo
- Publication number
- CN207513823U CN207513823U CN201721453810.8U CN201721453810U CN207513823U CN 207513823 U CN207513823 U CN 207513823U CN 201721453810 U CN201721453810 U CN 201721453810U CN 207513823 U CN207513823 U CN 207513823U
- Authority
- CN
- China
- Prior art keywords
- pitch curve
- circular gear
- free pitch
- curve non
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
- 239000007788 liquid Substances 0.000 claims abstract description 38
- 230000021615 conjugation Effects 0.000 claims description 39
- 239000012530 fluid Substances 0.000 claims description 30
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 238000005299 abrasion Methods 0.000 abstract description 3
- 230000010349 pulsation Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005213 imbibition Methods 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
- Rotary Pumps (AREA)
Abstract
The utility model discloses a kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving, the first, second free pitch curve non-circular gear of the utility model is fixedly mounted on input shaft；Two the second sliding rails are along the circumferential direction uniformly fixedly mounted on axle sleeve, one the second sliding blade of setting is slided on each second sliding rail；Two the first sliding rails are along the circumferential direction uniformly fixedly mounted on output shaft, one the first sliding blade of setting is slided on each first sliding rail；The utility model differential pump blade is sliding blade design, it can prevent since pump case deformation is stuck, the abrasion of blade cambered surface can be compensated simultaneously causes blade and pump case gap excessive, and for sliding blade in the of short duration tired liquid of cavity volume, blade realizes pressure release in short-term by being slided to axle center.The utility model can accurately control each point of pitch curve using B-spline curves, can further improve the performance of differential pump.
Description
Technical field
The utility model belongs to volume pump technical field, is related to multiple-blade differential pump, and in particular to a kind of free pitch curve
The slip quaterfoil differential pump of non-circular gear driving.
Background technology
The imbibition chamber and exhaust chamber of differential pump are symmetrical always, therefore the radial load that highly pressurised liquid is acted on blade is put down always
Weighing apparatus, the inner housing surface and blade shape of pump are simple compared with other types pump, and friction minor face is single (mainly blade and pump case), operating
Reliably, volumetric efficiency is high, displacement volume is better than big, radial direction service load balance, pulsation controllability, suitable for require high pressure,
Efficient occasion.
Existing differential pump is according to the difference of driving mechanism, and there are different shortcomings.Rotating guide-bar-gear type leaf
Piece differential pump, drive system bear alternating load, generate gear tooth noise, and when each pair clearance is larger can also cause
Impact noise.Universal joint gear mechanism driving blade differential pump, the input shaft of cating nipple and the angle of output shaft are shadows
Ring a key parameter of the performance of pump.The angle is bigger, and the discharge capacity of pump is also bigger, still, with the increase at the angle, the flow of pump
The transmission efficiency of pulsation aggravation and universal joint reduces.Off-centre operation non-circular gear driving blade differential pump is deformed, off-centre operation is not rounded
Gear pitch curve adjusting parameter is mainly eccentricity and deformation coefficient, and adjustment amount is limited, and Adjustment precision is not high, causes gearratio excellent
Change, adjustment inconvenience, design is dumb, is unfavorable for advanced optimizing design, it is difficult to the problems such as optimization pressure pulsation, tired liquid.
Fourier's non-circular gear driving blade differential pump, by changing 6 parameter adjustment performances, but since Fourier joins
Number cannot accurately control each point of pitch curve, lead to that differential pump performance cannot be advanced optimized, and such as pulsation rate, gear, root is not cut
The index parameters such as maximum modulus and discharge capacity.
Utility model content
The purpose of this utility model is in view of the deficiencies of the prior art, to provide a kind of free pitch curve non-circular gear driving
Quaterfoil differential pump is slided, blade differential pump driving non-circular gear designs pitch curve using k B-spline curves, due to being logical
Cross control point and determine pitch curve shape value point, and can arbitrarily controlling curve shape, therefore be defined here as free pitch curve, by
Can be with any amount in control point, therefore the variable speed rule of driving mechanism is easier to adjust, convenient function optimization, so as to
Further improve the performance of differential pump；Differential pump blade is sliding blade design, can be prevented since pump case deformation is stuck, together
When can compensate blade cambered surface abrasion cause blade and pump case gap excessive, sliding blade is in the of short duration tired liquid of cavity volume, blade
Pressure release in short-term is realized by being slided to axle center.
The utility model technical scheme applied to solve the technical problem is as follows：A kind of free pitch curve non-circular gear driving
Slip quaterfoil differential pump, including driving part and differential pump part；
The driving part includes gear-box, input shaft, output shaft, the first free pitch curve non-circular gear, second certainly
By pitch curve non-circular gear, the free pitch curve non-circular gear of the first conjugation, the free pitch curve non-circular gear of the second conjugation and axle sleeve；
Input is pivotally supported on gear-box, and the first free pitch curve non-circular gear and the second free pitch curve non-circular gear are fixedly mounted
On input shaft；The both ends of output shaft are supported on gear-box and pump case respectively, and the first free pitch curve non-circular gear of conjugation is consolidated
It is engaged on output shaft with the first free pitch curve non-circular gear Dingan County；The second free pitch curve non-circular gear of conjugation is consolidated
Surely one end of axle sleeve is connected to, axle sleeve is set on output shaft；The free pitch curve non-circular gear of second conjugation and second freely saves
Curve non-circular gear engages；
The differential pump part includes pump case, the first sliding blade, the second sliding blade, the first sliding rail, the second sliding rail；
The pump case is mounted on gear box outer wall, and pump case along the circumferential direction offers the first leakage fluid dram, the first liquid sucting port, second successively
Leakage fluid dram and the second liquid sucting port；Two the second sliding rails are along the circumferential direction uniformly fixedly mounted in the other end of axle sleeve, and each second slides
One the second sliding blade of setting is slided on rail；Two the first sliding rails are along the circumferential direction uniformly fixedly mounted on output shaft, each
One the first sliding blade of setting is slided on first sliding rail；Along the circumferential direction, the blade of the first sliding blade and second slides leaf
The alternate setting of blade of piece；
The pitch curve of the first free pitch curve non-circular gear and the pitch curve phase of the second free pitch curve non-circular gear
Together.
Further, the pitch curve F of the first free pitch curve non-circular gear(x,y)Expression formula it is as follows：
Wherein, (x, y) represents a point of rectangular coordinate system, and t represents independent variable, and n represents control point number, PiIt is i-th
A control point, Ni,k(t) k rank B-spline basic functions, t are representedk-1Represent independent variable lower limit, tn+1Represent the independent variable upper limit；
It, can be accurate by adjusting control point, controlling polygon according to the expression formula of the first free pitch curve non-circular gear
The shape of the free pitch curve of control, then the pitch curve of the first free pitch curve non-circular gear is to diameterExpression formula be：
WhereinRepresent the angular displacement of the first free pitch curve non-circular gear rotation,Represent the x put on pitch curve
Axis values,Represent the y-axis numerical value put on pitch curve；
According to the non-circular gear theory of engagement, the first free pitch curve non-circular gear rotationWhen, the first conjugation freely saves song
The angular displacement of line non-circular gear is
First free pitch curve non-circular gear is single order non-circular gear, and the first free pitch curve non-circular gear of conjugation is second order
Non-circular gear, therefore, when the first free pitch curve non-circular gear rotates 2 π, the free pitch curve non-circular gear rotation π of the first conjugation,
It can must calculate the iterative of centre-to-centre spacing a：
Given centre-to-centre spacing initial value a0, the exact value for calculating centre-to-centre spacing a is searched for using advance and retreat method.
Further, the input shaft is connected with motor.
Further, first leakage fluid dram is symmetrical arranged with the second leakage fluid dram, the first liquid sucting port and the second liquid sucting port pair
Claim setting.
Further, the initial installation of the described first free pitch curve non-circular gear and the second free pitch curve non-circular gear
Phase difference is π, and the free pitch curve non-circular gear of the first conjugation and the second the initial of the free pitch curve non-circular gear of conjugation install phase
Potential difference is
Further, the gearratio i of the first free pitch curve non-circular gear and the first free pitch curve non-circular gear of conjugation21
For：
The gearratio i of second free pitch curve non-circular gear and the second free pitch curve non-circular gear of conjugation43For：
By i21Equal to i43, can acquire four it is differentIt is minimizedWhen, the first free non-knuckle-tooth of pitch curve
The angular displacement of wheel isThe angular displacement of second free pitch curve non-circular gear isFirst sliding blade and
The corner of second sliding blade is respectively：
ψ1For the corner of the first sliding blade, ψ2Corner for the second sliding blade；
First leakage fluid dram centre bit angle setting of pump caseFirst liquid sucting port centre bit angle settingSecond leakage fluid dram centre bit angle setting ψRow 2=ψRow 1+ π, the second liquid sucting port centre bit angle setting ψInhale 2=ψInhale 1+π；The
One leakage fluid dram, the first liquid sucting port, the second leakage fluid dram and the second liquid sucting port it is equal in magnitude, and than the blade angle θ of bladeLeafSmall by 2~
5°；The blade angle θ of first sliding blade and the second sliding bladeLeafValue be 40 °~45 °.
The utility model has an advantageous effect in that：The utility model uses free pitch curve non-circular gear mechanism, the leaf
Piece differential pump driving non-circular gear designs pitch curve using B-spline curves, and pitch curve shape value point is determined by then passing through control point,
And can arbitrary controlling curve shape, since control point can be easier with any amount, the variable speed rule of driving mechanism
Adjustment, convenient function optimization；Differential pump blade is sliding blade design, can be prevented since pump case deformation is stuck, while can
Cause blade and pump case gap excessive to compensate the abrasion of blade cambered surface, in the of short duration tired liquid of cavity volume, blade overcomes sliding blade
Centrifugal force realizes pressure release in short-term by being slided to axle center.Due to the differential pump liquid sucting port of free pitch curve non-circular gear mechanism driving
Symmetrical with leakage fluid dram, radial equilibrium is good, and non-constant speed drive is rotary motion, therefore reliable, the radial direction service load that operates steadily
Balance, pulsation controllability are good；Blade is more, discharge capacity is big, and the inner surface and blade shape of pump case are simple, and volumetric efficiency is high.This practicality
Novel core institution is two pairs of different free pitch curve non-circular gears for installing phase, and component is few, compact-sized.
Description of the drawings
Fig. 1 is the kinematic sketch of mechanism of the utility model；
Fig. 2 is the overall structure sectional view of differential pump part in the utility model；
Fig. 3 is the blade extreme position schematic diagram of the utility model；
Fig. 4 is the free pitch curve control point of the utility model, controlling polygon and shape value point relational graph；
Fig. 5 is the free pitch curve engagement figure of the utility model differential pump non-circular gear；
Fig. 6 is the free pitch curve non-circular gear tooth profile figure of the utility model differential pump；
Fig. 7 is the utility model sliding blade stationary state figure；
Fig. 8 is low speed rotation state diagram in the utility model sliding blade；
Fig. 9 is the utility model sliding blade ultrahigh speed rotation status figure；
In figure：1st, gear-box, 2, input shaft, 3, output shaft, the 4, first free pitch curve non-circular gear, 5, second freely saves
Curve non-circular gear, the 6, first free pitch curve non-circular gear of conjugation, 7, second is conjugated free pitch curve non-circular gear, and 8, axis
Set, 9, shaft coupling, 10, motor, 11, pump case, 11-1, the first leakage fluid dram, 11-2, the first liquid sucting port, 11-3, the second leakage fluid dram,
11-4, the second liquid sucting port, the 12, first sliding blade, the 13, second sliding blade, the 14, first sliding rail, the 15, second sliding rail, 16, control
It is processed, 17, controlling polygon, 18, free pitch curve.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
As illustrated in fig. 1 and 2, a kind of quaterfoil differential pump of free pitch curve non-circular gear driving includes driving part and difference
Fast pump part；
Driving part includes gear-box 1, input shaft 2, output shaft 3, the first free pitch curve non-circular gear 4, second freely
Pitch curve non-circular gear 5, first is conjugated free pitch curve non-circular gear 6, second and is conjugated free pitch curve non-circular gear 7 and axle sleeve
8；Power is transmitted to input shaft 2 by motor 10 by shaft coupling 9, and input shaft 2 is by two bearings in the both sides of gear-box 1
Wall；First free 4 and second free pitch curve non-circular gear 5 of pitch curve non-circular gear is fixedly mounted on input shaft 2；Output
The both ends of axis 3 are respectively by bearings on the tank wall of gear-box 1 and pump case 11, the first free pitch curve non-circular gear of conjugation
6 are fixedly mounted on output shaft 3, and with 4 engaged transmission of the first free pitch curve non-circular gear；The second free pitch curve of conjugation is non-
Knucle-gear 7 is fixedly connected on one end of axle sleeve 8, and axle sleeve 8 is set on output shaft 3；The second free non-knuckle-tooth of pitch curve of conjugation
7 and second free 5 engaged transmission of pitch curve non-circular gear of wheel.
Differential pump part includes pump case 11, the first sliding blade 12, the second sliding blade 13, the first sliding rail 14, second and slides
Rail 15；The pump case 11 is mounted on the outer wall of gear-box 1, and pump case 11 along the circumferential direction offers the first leakage fluid dram 11- successively
1st, the first liquid sucting port 11-2, the second leakage fluid dram 11-3 and the second liquid sucting port 11-4；First leakage fluid dram 11-1 and the second leakage fluid dram 11-
3 are symmetrical arranged, and the first liquid sucting port 11-2 is symmetrical arranged with the second liquid sucting port 11-4；The other end of axle sleeve 8 is along the circumferential direction uniform
Two the second sliding rails 15 are fixedly mounted, one the second sliding blade 13 of setting is slided on each second sliding rail 15；2 upper edge of output shaft
Two the first sliding rails 14 are uniformly fixedly mounted in circumferencial direction, and one the first sliding blade of setting is slided on each first sliding rail 14
12；Along the circumferential direction, the blade of the first sliding blade 12 setting alternate with the blade of the second sliding blade 13.
As shown in Fig. 2,5, the pitch curve of the first free 4 and second free pitch curve non-circular gear 5 of pitch curve non-circular gear
Identical, the first free pitch curve non-circular gear 6 of conjugation is identical with the pitch curve of the second free pitch curve non-circular gear 7 of conjugation, the
One free pitch curve non-circular gear 4, the second free pitch curve non-circular gear 5 are single order non-circular gear；First conjugation freely saves song
It is second order non-circular gear that line non-circular gear 6 and second, which is conjugated free pitch curve non-circular gear 7,；First free pitch curve non-circular gear
4 and second free pitch curve non-circular gear 5 initially installation phase difference be π；The first free pitch curve non-circular gear 6 and second of conjugation
The phase difference of initially installing of the free pitch curve non-circular gear 7 of conjugation isRealize the first sliding blade 12 and the second sliding blade
13 differential rotation so that the volume cyclically-varying of differential pump closing chamber, in the first leakage fluid dram 11-1 and the second leakage fluid dram 11-
3 generate drain, and imbibition is generated in the first liquid sucting port 11-2 and the second liquid sucting port 11-4.
The operation principle of the slip quaterfoil differential pump of the free pitch curve non-circular gear driving：
Power is transmitted to the first free pitch curve non-circular gear 4 and second freely by motor 10 by shaft coupling 9 and input shaft 2
Pitch curve non-circular gear 5.First free pitch curve non-circular gear 4 is engaged with the first free pitch curve non-circular gear 6 of conjugation, and second
Free pitch curve non-circular gear 5 is engaged with the second free pitch curve non-circular gear 7 of conjugation, the first free non-knuckle-tooth of pitch curve of conjugation
Power is transmitted to the first sliding blade 12 by wheel 6 by output shaft 3, and the second free pitch curve non-circular gear 7 of conjugation passes through power
Axle sleeve 8 is transmitted to the second sliding blade 13.The installation phase of two pairs of free pitch curve noncircular gear pairs is different, realizes the first blade 12
It is rotated with the differential of the second blade 13, so as to fulfill imbibition and drain.Due between the first sliding blade 12 and the first sliding rail 14,
It is slidably connected between second sliding blade 13 and the second sliding rail 15, as rotating speed increases, under the influence of centrifugal force, first
Sliding blade 12, the second sliding blade 13 are reduced respectively with the gap of pump case 11, have automatic compensation blade wear effect.Simultaneously
When partial volume chamber is stranded liquid, volume cavity pressure overcomes blade centrifugal force, increases the first sliding blade 12, the second sliding blade 13
With the gap of pump case 11, cavity volume penetrates through before and after realization, and Fig. 7 is the utility model sliding blade stationary state figure；Fig. 8 is this reality
With low speed rotation state diagram in Novel sliding blade；Fig. 9 is the utility model sliding blade ultrahigh speed rotation status figure.
As shown in figure 4, according to free curve generating principle, the present embodiment selects 26 control points 16 (due to being that closing is bent
Line, one of to repeat), 26 control points 16 join end to end to form controlling polygon 17 successively, are formed in controlling polygon 17
Free pitch curve 18, so that it is determined that the pitch curve of the first free pitch curve non-circular gear 4, then given first free pitch curve are not rounded
Gear 4 and first is conjugated the centre-to-centre spacing initial value a of free pitch curve non-circular gear 60, according to pitch curve sealing condition and engagement item
Part searches for the exact value for obtaining centre-to-centre spacing a using advance and retreat method.Specific calculating is as follows：
The pitch curve F of first free pitch curve non-circular gear 4(x,y)Expression formula is：
Wherein, (x, y) represents a point of rectangular coordinate system, and t represents independent variable, and n represents control point number, and n takes 26, Pi
For i-th of control point, Ni,3(t) it represents, 3 ranks (2 times) B-spline basic function, t2Represent independent variable lower limit, t2It takest27It represents
The independent variable upper limit, takes
Under the expression of 3 rank B-spline basic functions：
According to the expression formula of the first free pitch curve non-circular gear, as shown in figure 4, more by adjusting control point 16, control
Side shape 17 accurately controls the shape of free pitch curve 18.Then the first free pitch curve non-circular gear to diameterExpression formula is：
WhereinRepresent the angular displacement of the first free pitch curve non-circular gear rotation,Represent the x put on pitch curve
Axis values,Represent the y-axis numerical value put on pitch curve；
According to the non-circular gear theory of engagement, when the first free pitch curve non-circular gear 4 is rotated by 360 °, the first conjugation freely saves
The angular displacement of curve non-circular gear 6：
First free pitch curve non-circular gear 4 is single order non-circular gear, and the first free pitch curve non-circular gear 6 of conjugation is
Second order non-circular gear, therefore, when the first free pitch curve non-circular gear 4 is rotated by 360 °, the first free non-knuckle-tooth of pitch curve of conjugation
Wheel 6 also rotates 180 °, can must calculate the iterative of centre-to-centre spacing a：
Take centre-to-centre spacing initial value a0The exact value for calculating centre-to-centre spacing a is searched for using advance and retreat method.
After the exact value for acquiring centre-to-centre spacing a, row, the liquid sucting port center of pump case, the row of quaterfoil differential pump can be solved
Amount, instantaneous flow variation expression formula.Specific calculating is as follows：
First free pitch curve non-circular gear 4 and the first gearratio for being conjugated free pitch curve non-circular gear 6 are：
Second free pitch curve non-circular gear 5 and the second gearratio for being conjugated free pitch curve non-circular gear 7 are：
The initial installation phase difference of first free 4 and second free pitch curve non-circular gear 5 of pitch curve non-circular gear, value
It is 180 °.
By i21Equal to i43, can acquire four it is differentIt is minimizedWhen, the first free non-knuckle-tooth of pitch curve
Wheel 4 angular displacement beThe angular displacement of second free pitch curve non-circular gear 5 isFirst blade 12
Corner with the second blade 13 is respectively：
As shown in figure 3, the first leakage fluid dram centre bit angle setting of pump caseFirst liquid sucting port center
AngleSecond leakage fluid dram centre bit angle setting ψRow 2=ψRow 1+ π, the second liquid sucting port centre bit angle setting ψInhale 2=ψInhale 1+
π；First leakage fluid dram, the first liquid sucting port, the second leakage fluid dram and the second liquid sucting port size than the blade angle θ of bladeLeafIt is 2 ° small；The
The blade angle θ of one blade 12 and the second blade 13LeafValue be 45 °.
Adjacent two blades minimum subtended angleThe closing chamber is held to be minimum at this time
Product：
Wherein, R is blade radius, value 90mm；R be sharf radius, value 20mm；H is vane thickness, value
For 50mm.
Adjacent two blades maximum subtended angleThe closing chamber is most at this time
Big volume：
The discharge capacity account expression formula of quaterfoil differential pump：
Q=4 × (Vmax-Vmin(the Δ ψ of)=2max-Δψmin)(R2-r2)×h×10-6
The instantaneous flow calculation expression formula of quaterfoil differential pump：
Wherein, V is exhaust chamber volume；ω is the first free 4 and second free non-knuckle-tooth of pitch curve of pitch curve non-circular gear
The angular speed of wheel 5, calculating formula are
As shown in figure 4, the control point of the pitch curve expression formula of the first free pitch curve non-circular gear 4 is 26 (head and the tail points
Repeat), as shown in figure 5, the exponent number of the first free pitch curve non-circular gear 4 is 1, the first free pitch curve non-circular gear 6 of conjugation
Exponent number is 2.As shown in fig. 6, the second free pitch curve non-circular gear 5 and second is conjugated the flank profil of free pitch curve non-circular gear 7
Identical, the first free pitch curve non-circular gear 4 is identical with the flank profil of the second free pitch curve non-circular gear 5, and the first conjugation is freely
Pitch curve non-circular gear 6 is identical with the flank profil of the two free pitch curve non-circular gears 7 of conjugation.Centre-to-centre spacing initial value a0=35mm can be asked
It is 108mm, the first leakage fluid dram centre bit angle setting ψ to obtain centre-to-centre spacing aRow 1For 85 °, the first liquid sucting port centre bit angle setting ψInhale 1For 103 °,
Two leakage fluid dram centre bit angle setting ψRow 2For 265 °, the second liquid sucting port centre bit angle setting ψInhale 2It is 283 °.Under the parameter, quaterfoil differential
The two parallel pumps discharge capacity of pump is maximum, value 3655ml.
Claims (6)
1. a kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving, which is characterized in that including driving part and
Differential pump part；
The driving part is freely saved including gear-box, input shaft, output shaft, the first free pitch curve non-circular gear, second
Curve non-circular gear, the free pitch curve non-circular gear of the first conjugation, the free pitch curve non-circular gear of the second conjugation and axle sleeve；Input
It is pivotally supported on gear-box, the first free pitch curve non-circular gear and the second free pitch curve non-circular gear are fixedly mounted on defeated
Enter on axis；The both ends of output shaft are supported on gear-box and pump case respectively, and the first free pitch curve non-circular gear of conjugation fixes peace
It is engaged on output shaft, and with the first free pitch curve non-circular gear；The second free pitch curve non-circular gear of conjugation, which is fixed, to be connected
One end of axle sleeve is connected on, axle sleeve is set on output shaft；The free pitch curve non-circular gear of second conjugation and the second free pitch curve
Non-circular gear engages；
The differential pump part includes pump case, the first sliding blade, the second sliding blade, the first sliding rail, the second sliding rail；It is described
Pump case is mounted on gear box outer wall, and pump case along the circumferential direction offers the first leakage fluid dram, the first liquid sucting port, the second drain successively
Mouth and the second liquid sucting port；Two the second sliding rails are along the circumferential direction uniformly fixedly mounted in the other end of axle sleeve, on each second sliding rail
Slide one the second sliding blade of setting；On output shaft along the circumferential direction uniformly be fixedly mounted two the first sliding rails, each first
One the first sliding blade of setting is slided on sliding rail；Along the circumferential direction, the blade of the first sliding blade and the second sliding blade
The alternate setting of blade；
The pitch curve of the first free pitch curve non-circular gear and the pitch curve of the second free pitch curve non-circular gear are identical, the
One free pitch curve non-circular gear is single order non-circular gear, and the first free pitch curve non-circular gear of conjugation is second order non-circular gear.
2. a kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving according to claim 1, feature
It is, the pitch curve F of the first free pitch curve non-circular gear(x,y)Expression formula it is as follows：
Wherein, (x, y) represents a point of rectangular coordinate system, and t represents independent variable, and n represents control point number, PiFor i-th of control
Point, Ni,k(t) k rank B-spline basic functions, t are representedk-1Represent independent variable lower limit, tn+1Represent the independent variable upper limit；
According to the expression formula of the first free pitch curve non-circular gear, can accurately be controlled by adjusting control point, controlling polygon
The shape of free pitch curve, then the pitch curve of the first free pitch curve non-circular gear is to diameterExpression formula be：
WhereinRepresent the angular displacement of the first free pitch curve non-circular gear rotation,Represent the x-axis number put on pitch curve
Value,Represent the y-axis numerical value put on pitch curve；
According to the non-circular gear theory of engagement, the first free pitch curve non-circular gear rotationWhen, the first free pitch curve of conjugation is not rounded
The angular displacement of gear is
First free pitch curve non-circular gear is single order non-circular gear, and the first free pitch curve non-circular gear of conjugation is not rounded for second order
Gear, therefore, when the first free pitch curve non-circular gear rotates 2 π, the free pitch curve non-circular gear rotation π of the first conjugation can be obtained
Calculate the iterative of centre-to-centre spacing a：
Given centre-to-centre spacing initial value a0, the exact value for calculating centre-to-centre spacing a is searched for using advance and retreat method.
3. a kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving according to claim 1, feature
It is, the input shaft is connected with motor.
4. a kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving according to claim 1, feature
It is, first leakage fluid dram is symmetrical arranged with the second leakage fluid dram, and the first liquid sucting port is symmetrical arranged with the second liquid sucting port.
5. a kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving according to claim 1, feature
It is, the initial installation phase difference of the first free pitch curve non-circular gear and the second free pitch curve non-circular gear is π, the
The free pitch curve non-circular gear of one conjugation and the second initial installation phase difference for being conjugated free pitch curve non-circular gear are
6. a kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving according to claim 5, feature
It is, the gearratio i of the first free pitch curve non-circular gear and the first free pitch curve non-circular gear of conjugation21For：
The gearratio i of second free pitch curve non-circular gear and the second free pitch curve non-circular gear of conjugation43For：
By i21Equal to i43, can acquire four it is differentIt is minimizedWhen, the first free pitch curve non-circular gear
Angular displacement isThe angular displacement of second free pitch curve non-circular gear isFirst sliding blade and
The corner of two sliding blades is respectively：
ψ1For the corner of the first sliding blade, ψ2Corner for the second sliding blade；
First leakage fluid dram centre bit angle setting of pump caseFirst liquid sucting port centre bit angle settingSecond leakage fluid dram centre bit angle setting ψRow 2=ψRow 1+ π, the second liquid sucting port centre bit angle setting ψInhale 2=ψInhale 1+π；The
One leakage fluid dram, the first liquid sucting port, the second leakage fluid dram and the second liquid sucting port it is equal in magnitude, and than the blade angle θ of bladeLeafSmall by 2~
5°；The blade angle θ of first sliding blade and the second sliding bladeLeafValue be 40 °~45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721453810.8U CN207513823U (en) | 2017-11-03 | 2017-11-03 | A kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721453810.8U CN207513823U (en) | 2017-11-03 | 2017-11-03 | A kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207513823U true CN207513823U (en) | 2018-06-19 |
Family
ID=62538008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721453810.8U Withdrawn - After Issue CN207513823U (en) | 2017-11-03 | 2017-11-03 | A kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207513823U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701421A (en) * | 2017-11-03 | 2018-02-16 | 浙江水利水电学院 | The slip quaterfoil differential pump of free pitch curve non-circular gear driving |
| CN113700646A (en) * | 2021-09-07 | 2021-11-26 | 南京工业泵厂 | Rotor pump |
-
2017
- 2017-11-03 CN CN201721453810.8U patent/CN207513823U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701421A (en) * | 2017-11-03 | 2018-02-16 | 浙江水利水电学院 | The slip quaterfoil differential pump of free pitch curve non-circular gear driving |
| CN107701421B (en) * | 2017-11-03 | 2024-02-13 | 浙江水利水电学院 | Sliding four-blade differential pump driven by free pitch curve non-circular gears |
| CN113700646A (en) * | 2021-09-07 | 2021-11-26 | 南京工业泵厂 | Rotor pump |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207513823U (en) | A kind of slip quaterfoil differential pump of free pitch curve non-circular gear driving | |
| CN207598489U (en) | A kind of slip quaterfoil differential pump of free gearratio non-circular gear driving | |
| CN102261344B (en) | Synchronous regulating device of high-speed centrifugal fan outlet guide vane | |
| CN107701421A (en) | The slip quaterfoil differential pump of free pitch curve non-circular gear driving | |
| CN202833322U (en) | Synchronous adjusting device of high-speed centrifugal fan inlet guide blades | |
| CN107676254A (en) | The slip quaterfoil differential pump of free gearratio non-circular gear driving | |
| CN103742406B (en) | Four-vane differential velocity pump driven by Fourier noncircular gears | |
| CN205930276U (en) | Hydraulic pressure infinitely variable speed drives car | |
| CN203702541U (en) | Four-blade differential pump driven by sinusoidal non-circular gears | |
| CN202251002U (en) | Synchronous adjusting device of outlet guide vane of high speed centrifugal blower | |
| CN203730302U (en) | Fourier non-circular gear-driven eight-blade differential pump | |
| CN203730296U (en) | Fourier non-circular gear-driven six-blade differential pump | |
| CN112983807B (en) | Double-cavity differential pump driven by conjugate phase-variable non-circular gears and design method | |
| CN103758757B (en) | Eight blade differential pumps that a kind of Fourier's noncircular gear drives | |
| CN204628458U (en) | A kind of stepless change motive bearing | |
| CN104864051A (en) | Infinitely variable speed power bearing | |
| CN104088973B (en) | A kind of buncher of gear drive Hydraulic Adjustable Speed | |
| CN203702543U (en) | Eight-blade differential pump driven by sinusoidal non-circular gears | |
| CN203702542U (en) | Six-blade differential pump driven by sinusoidal non-circular gears | |
| CN103758748B (en) | The quaterfoil differential pump that a kind of sinusoidal non-circular gear drives | |
| CN203730300U (en) | Fourier non-circular gear-driven four-blade differential pump | |
| CN203730303U (en) | Pascal non-circular gear-driven six-blade differential pump | |
| CN113586439B (en) | Gear pump flow pulsation stabilizing method driven by non-circular gear in variable speed and gear pump | |
| CN203730298U (en) | Pascal non-circular gear-driven four-blade differential pump | |
| CN103758753B (en) | Six blade differential pumps that a kind of Bath main officer of Tibet noncircular gear drives |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20180619 Effective date of abandoning: 20240213 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20180619 Effective date of abandoning: 20240213 |