CN103498793B - Variable gear pump - Google Patents
Variable gear pump Download PDFInfo
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- CN103498793B CN103498793B CN201310505250.6A CN201310505250A CN103498793B CN 103498793 B CN103498793 B CN 103498793B CN 201310505250 A CN201310505250 A CN 201310505250A CN 103498793 B CN103498793 B CN 103498793B
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Abstract
The invention provides a gear pump which can conduct displacement variation according to the needs. The variable gear pump comprises a displacement variation mechanical module, a displacement variation control module A and a displacement variation control module B. A motor drives gears and piston rod installation disks to synchronously rotate. In the positions where the gears quit meshing, the two ends of each piston rod generate a pressure difference, springs are compressed, axial movement is generated, and each piston rod is embedded into a tooth groove of the driving gear or the driven gear until balance is achieved. Then, the piston rods continue to move along with the piston rod installation disks, sealed space is defined by the piston rod installation disks, baffles, a main pump body and the gears, and the piston rods reach balance in the sealed space. When the gears are about to reach the positions of meshing, the two ends of each piston rod generate a reverse pressure difference, the resilience of the springs acts on the two ends of the piston rods, so that the piston rods are squeezed out of the tooth grooves, and therefore normal meshing of the gears is guaranteed. According to the variable gear pump, the volume of a working cavity is changed through change of the lengths of the portions, embedded into the tooth grooves of the driving gear or the driven gear, of a piston rod set, and therefore the displacement is changed.
Description
Technical field
A kind of the present invention relates to hydraulic machinery technology, it is more particularly related to gear pump with variable capacity.
Background technology
Gear pump is widely used in Hydraulic Field.The advantage of gear pump is：Structure is simple, and small volume is lightweight,
Part is few, good manufacturability, easy to manufacture, easy to maintenance, cheap, and self-priming performance is good；Pollution to fluid is insensitive, work
It is difficult in engineering to kill or stuck, can the fluid of transfer of highly viscous and the big fluid of denseness.But gear pump also has the disadvantage that：
Flow and pressure fluctuation are larger, and noise is big, and high temperature efficiency is low, and discharge capacity is immutable etc..Wherein discharge capacity is immutable to a great extent
Limit the range of application of gear pump.The present invention just proposes the problem of a gear pump with variable capacity, from the point of view of current research situation, fresh
It is related to the research successful example of gear pump with variable capacity.
Content of the invention
For the above-mentioned technical problem of prior art, the invention provides one kind being capable of basis in the case that rotating speed is constant
Demand carries out the gear pump of variable.
The present invention is achieved through the following technical solutions.
A kind of be applied to the gear pump that can carry out discharge capacity precise control in the case that rotating speed is constant according to demand, it is special
Levy and be：This gear pump with variable capacity includes：Variable machinery module, displacement variation control module A and displacement variation control module B.
Preferably, described variable machinery module includes bolt A, bolt B, bolt C, bolt D, bolt E, left pump cover, main pump
Body, bearing A, bearing B, bearing C, bearings D, axle sleeve A, axle sleeve B, axle sleeve C, axle sleeve D, baffle plate A, baffle plate B, piston rod group A, piston
Bar group B, groups of springs A, groups of springs B, piston rod mounting disc A, piston rod mounting disc B, swing link A, swing link B, driving gear, from
Moving gear, driving shaft, driven shaft, key A, key B, felt, right pump cover, a hole, b hole, c hole, d hole；
Left pump cover and right pump cover are connected to main pump body by bolt A, bolt B, bolt C, bolt D, bolt E, and in main pump
Define a working chamber in vivo.Two mouths are had on main pump body, is oil-out and oil-in respectively, the work being connected with oil-out
Chamber is pumping cavity, and the working chamber being connected with oil-in is oil sucting cavity.It is respectively mounted on piston rod mounting disc A and piston rod mounting disc B
There is shop bolt, coordinated it is ensured that piston rod is pacified with the dowel hole on driving gear and driven gear respectively during installation
Sabot A and piston rod mounting disc B and driving gear and driven gear relative position accurate, make both synchronous axial system.Bearing A,
Bearing B, bearing C and bearings D are separately fixed in the bearing block in left pump cover and right pump cover, and are equipped with positioning shaft sleeve A, axle respectively
Set B, axle sleeve C and axle sleeve D.Driving shaft, driving gear are connected by key A with piston rod mounting disc A.Driven shaft, driven gear with
Piston rod mounting disc B is connected by key B.Driving gear is engaged each other with driven gear, and Motor drive driving gear drives driven
Pinion rotation, and the modulus of driving gear and driven gear, the number of teeth, gear width all same.Driving shaft and bearing A and bearing B
Interference fit is to ensure to be accurately positioned.Driving shaft external part is connected with motor, and uses felt seal.Driven shaft and bearing C and axle
Hold D interference fit to ensure to be accurately positioned.Piston rod mounting disc A and piston rod mounting disc B is cylinder, respectively with swing link
The negative area of A and swing link B is coordinated.Baffle plate A and baffle plate B is respectively placed in the left and right two ends of main pump body working chamber, and embedding
Enter in main pump body.Uniformly it is arranged a number of piston hole on piston rod mounting disc A and piston rod mounting disc B.Piston rod group A
Number of springs and piston rod mounting disc A and piston rod peace with the piston rod quantity, groups of springs A and groups of springs B of piston rod group B
Piston hole count on sabot B is all identical with the number of teeth of gear.The spring of groups of springs A and groups of springs B be respectively fitted over piston rod group A and
On the piston rod of piston rod group B, then it is placed in the piston hole on piston rod mounting disc A and piston rod mounting disc B.Piston
Bar can move axially in piston hole, and in a part of inter-tooth slots that can move to gear of piston rod.Adjustment
Piston rod embeds the distance between driving gear or driven gear inter-tooth slots and can produce different discharge capacities.At oil-out
Left pump cover, right pump cover, have hole a and hole c, its mesopore a and hole c to be connected with fuel tank respectively on baffle plate A and baffle plate B.Near enter
Have respectively on the left pump cover of oil port, right pump cover, baffle plate A and baffle plate B hole b and hole d, its mesopore b and hole d respectively with Variable Control
Two-position two-way solenoid valve A in modules A, displacement variation control module B is connected with two-position two-way solenoid valve B.Hole b and hole d is connected with oil pressure.
Preferably, described displacement variation control module A includes：Type pilot ratio electromagnetic type pressure-control valve A, bi-bit bi-pass electromagnetism
Valve A；
The oil-in of type pilot ratio electromagnetic type pressure-control valve A is connected with the oil-out of variable machinery module.Type pilot
The oil-out of ratio electromagnetic type pressure-control valve A is connected with the oil-in of two-position two-way solenoid valve A.Two-position two-way solenoid valve A's
Oil-out is connected with hole b.When two-position two-way solenoid valve A is in " breaking " state, the oil pressure in the b of hole is normal pressure, and piston rod will not
It is embedded in driven gear gear inter-tooth slots.When two-position two-way solenoid valve A is in " leading to " state, controlled by changing electric current
Type pilot ratio electromagnetic type pressure-control valve A, and then piston rod can be adjusted and embed driven gear between cog with the oil pressure of adjustment hole b
The distance between groove, makes gear pump obtain different discharge capacities.
Preferably, described displacement variation control module B includes：Type pilot ratio electromagnetic type pressure-control valve B, bi-bit bi-pass electromagnetism
Valve B；
The oil-in of type pilot ratio electromagnetic type pressure-control valve B is connected with the oil-out of variable machinery module.Type pilot
The oil-out of ratio electromagnetic type pressure-control valve B is connected with the oil-in of two-position two-way solenoid valve B.Two-position two-way solenoid valve B's
Oil-out is connected with hole d.When two-position two-way solenoid valve B is in " breaking " state, the oil pressure in the d of hole is normal pressure, and piston rod will not
It is embedded in groove between driving gear gear teeth.When two-position two-way solenoid valve B is in " leading to " state, controlled by changing electric current
Type pilot ratio electromagnetic type pressure-control valve B, and then piston rod can be adjusted and embed driving gear between cog with the oil pressure of adjustment hole d
The distance between groove, makes gear pump obtain different discharge capacities.
The operation principle of the present invention：
The principle that the present invention realizes variable is, for the gear pump of a determination, its working chamber volume is constant, is driving electricity
In the case that machine rotating speed is constant, using changing, piston rod embeds driving gear or the length of driven gear inter-tooth slots changes work
The size of chamber volume, and then change discharge capacity it is achieved that the precise control of gear pumpage.
During work, motor drives intermeshing driving gear and driven gear to rotate, be separately installed with piston rod group A and
The piston rod mounting disc A of piston rod group B and piston rod mounting disc B is also with driving gear and driven gear synchronous axial system.Leading
When moving gear and driven gear exit the position of engagement, the piston rod one end moving to hole b or hole d is subject to the oil of hole b or hole d
Pressure, other end is subject to the oil pressure of oil sucting cavity.Due in hole b and hole d oil pressure adjustable and be higher than normal pressure, the oil pressure of oil sucting cavity is normal
Pressure, leads to piston rod two ends to produce pressure reduction, piston rod compression spring, moves axially, and until reaching balance, piston rod embeds
In driving gear or driven gear inter-tooth slots.Then piston rod continues with piston rod mounting disc A and piston rod mounting disc B fortune
Dynamic, away from hole b or hole d, piston rod mounting disc A, piston rod mounting disc B, baffle plate A, baffle plate B, main pump body, driving gear, driven
Gear constitutes the space of sealing, and piston rod leaves hole b or hole d and reaches balance in this sealing space.Driving gear and from
When moving gear will enter at the position of engagement, the piston rod one end moving to hole a or hole c is subject to the oil pressure of hole a or hole c, separately
Outer one end is subject to the oil pressure of pumping cavity.Because hole a is connected with fuel tank with hole c, its oil pressure is normal pressure, and the oil pressure of pumping cavity is height
Pressure, produces pressure reduction, and piston rod is subject to the restoring force of spring simultaneously, causes piston rod to be forced out inter-tooth slots, thus ensureing driving tooth
Wheel and driven gear normally engage.
According to the oil pressure state of hole b and hole d, the present invention has three kinds of working methods：
1st, working method 1：The oil pressure of hole b and hole d is normal pressure.Under this kind of working method, due to the active force of spring, live
Stopper rod is in the state being forced out driving gear and driven gear inter-tooth slots all the time, and gear pump with variable capacity discharge capacity is maximum, in rotating speed one
Regularly, maximum flow now, its effect is equal to common gear pump.
2nd, working method 2：The oil pressure of hole b is normal pressure, and the oil pressure of hole d is the oil pressure of controllable high-voltage or hole b is controllable high-voltage,
The oil pressure of hole d is normal pressure.In this mode of operation, the piston rod of piston rod group A or piston rod group B can move axially.
The advantage of this working method：Displacement control high precision, for realizing equal changes in flow rate, compared to working method 3,
The pressure range of required change is larger, facilitates implementation accurate adjustment and controls.The deficiency of this working method：Displacement control scope is relatively
Working method 3 is half as large.
3rd, working method 3：The oil pressure of hole b and hole d is controllable high-voltage, in this mode of operation, piston rod group A and work
The piston rod of stopper rod group B can move axially.
The advantage of this working method：Displacement control scope is twice compared with working method 2.The deficiency of this working method：Discharge capacity
Control accuracy is low, and for realizing equal changes in flow rate, compared to working method 2, the pressure range of required change is less.
Compared with the prior art, the beneficial effects of the present invention is：
It is achieved that the flow adjustment of gear pump in the case of motor speed is immovable, effectively solves gear pump and exist
The immutable problem of discharge capacity in daily commercial Application.Compared to common gear pump, the present invention increases baffle plate A, baffle plate B, piston rod
Group A, piston rod group B, groups of springs A, groups of springs B, the assembly such as piston rod mounting disc A, piston rod mounting disc B.It is cased with spring respectively
The piston rod A and piston rod B of group A and groups of springs B are each passed through piston rod mounting disc A and piston rod mounting disc B, are embedded in driving wheel
In tooth and driven gear inter-tooth slots, by the oil pressure of displacement variation control module A and displacement variation control module B adjusting hole b and hole d, realize
The axial movement of piston rod, changes the function that working chamber volume realizes adjustment discharge capacity.
Gear pump with variable capacity of the present invention has a compact conformation, small volume, and parts machining process is simple, the features such as interchangeability is strong,
Can long-range precise control, be remarkably improved the service life of gear pump, in addition there are several working ways, applied widely, just
Popularization and application in invention.
Brief description
Figure 1A is the main sectional view of the gear pump with variable capacity variable machinery module of the present invention.
Figure 1B is the Structure explosion diagram of the gear pump with variable capacity variable machinery module of the present invention.
Fig. 2 is the A-A sectional view of Figure 1A of the present invention.
Fig. 3 is the B-B sectional view of Figure 1A of the present invention.
Fig. 4 is the C-C sectional view of Figure 1A of the present invention.
Fig. 5 is the D-D sectional view of Figure 1A of the present invention.
Fig. 6 is the E-E sectional view of Figure 1A of the present invention.
Fig. 7 is the gear pump with variable capacity variable principle figure of the present invention.
In figure：1. variable machinery module, 101A. bolt A, 101B. bolt B, 101C. bolt C, 101D. bolt D, 101E.
Bolt E, 102. left pump covers, 103. main pump bodies, 104A. bearing A, 104B. bearing B, 104C. bearing C, 104D. bearings D, 105A.
Axle sleeve A, 105B. axle sleeve B, 105C. axle sleeve C, 105D. axle sleeve D, 106A. baffle plate A, 106B. baffle plate B, 107A. piston rod group A,
107B. piston rod group B, 108A. groups of springs A, 108B. groups of springs B, 109A. piston rod mounting disc A, 109B. piston rod mounting disc
B, 110A. swing link A, 110B. swing link B, 111. driving gears, 112. driven gears, 113. driving shafts, 114. driven shafts,
115A. key A, 115B. key B, 116. felts, 117. right pump covers, a. hole, b. hole, c. hole, d. hole；
2. displacement variation control module A, 201. type pilot ratio electromagnetic type pressure-control valve A, 202. two-position two-way solenoid valve A；
3. displacement variation control module B, 301. type pilot ratio electromagnetic type pressure-control valve B, 302. two-position two-way solenoid valve B.
Specific embodiment：
Below by combining accompanying drawing, and the invention will be further described to combine accompanying drawing.
Referring to Fig. 7, the present invention is by variable machinery module 1, displacement variation control module A2 and displacement variation control module B3 tri- part group
Become.Displacement variation control module A2 and the oil pressure of displacement variation control module B3 difference control hole b and hole d, thus change variable machinery module 1
In piston rod group A107A and piston rod group B107B embed the length of driving gear 111 or driven gear 112 inter-tooth slots, and then
Change discharge capacity.
(1) variable machinery module
Referring to Figure 1A, Figure 1B, Fig. 2～6, variable machinery module 1 include bolt A101A, bolt B 101B, bolt C101C,
Bolt D101D, bolt E101E, left pump cover 102, main pump body 103, bearing A104A, bearing B104B, bearing C104C, bearing
D104D, axle sleeve A105A, axle sleeve B105B, axle sleeve C105C, axle sleeve D105D, baffle plate A106A, baffle plate B106B, piston rod group
A107A, piston rod group B107B, groups of springs A108A, groups of springs B108B, piston rod mounting disc A109A, piston rod mounting disc
B109B, swing link A110A, swing link B110B, driving gear 111, driven gear 112, driving shaft 113, driven shaft 114, key
A115A, key B115B, felt 116, right pump cover 117, hole a, hole b, hole c, hole d；
Left pump cover 102 and right pump cover 117 pass through bolt A101A, bolt B 101B, bolt C101C, bolt D101D, bolt
E101E is connected to main pump body 103, and defines a working chamber in main pump body 103.Two mouths are had on main pump body 103, respectively
It is oil-out and oil-in, the working chamber being connected with oil-out is pumping cavity, and the working chamber being connected with oil-in is oil sucting cavity.Live
Be mounted on shop bolt on stopper rod mounting disc A109A and piston rod mounting disc B109B, during installation respectively with driving gear 111
Coordinated it is ensured that piston rod mounting disc A109A and piston rod mounting disc B109B with the dowel hole on driven gear 112
Accurate with driving gear 111 and driven gear 112 relative position, make both synchronous axial system.Bearing A104A, bearing B104B,
Bearing C104C and bearings D 104D are separately fixed in the bearing block in left pump cover 102 and right pump cover 117, and are equipped with positioning shaft sleeve
A105A, axle sleeve B105B, axle sleeve C105C and axle sleeve D105D.Driving shaft 113, driving gear 111 and piston rod mounting disc A109A
Connected by key A115A.Driven shaft 114, driven gear 112 are connected by key B115B with piston rod mounting disc B109B.Actively
Gear 111 is engaged each other with driven gear 112, and Motor drive driving gear 111 drives driven gear 112 to rotate, and driving tooth
The modulus of wheel 111 and driven gear 112, the number of teeth, gear width all same.Driving shaft 113 and bearing A104A and bearing B104B
Interference fit is to ensure to be accurately positioned.Driving shaft 113 external part is connected with motor, and is sealed with felt 116.Driven shaft 114 with
Bearing C104C and bearings D 104D interference fit are to ensure to be accurately positioned.Piston rod mounting disc A109A and piston rod mounting disc
B109B is cylinder, is coordinated with the negative area of swing link A110A and swing link B110B respectively.Baffle plate A106A and
Baffle plate B106B is respectively placed in the left and right two ends of main pump body 103 working chamber, and in embedded main pump body 103.Piston rod mounting disc
Uniformly it is arranged a number of piston hole on A109A and piston rod mounting disc B109B.Piston rod group A107A and piston rod group
The number of springs of piston rod quantity, groups of springs A108A and groups of springs B108B of B107B and piston rod mounting disc A109A and work
Piston hole count on stopper rod mounting disc B109B is all identical with the number of teeth of gear.Groups of springs A108A and the spring of groups of springs B108B
It is respectively fitted in piston rod group A107A and the piston rod of piston rod group B107B, be then placed on piston rod mounting disc respectively
In piston hole on A109A and piston rod mounting disc B109B.Piston rod can move axially in piston hole, and lives
In a part of inter-tooth slots that can move to gear of stopper rod.Adjustment piston rod embeds driving gear 111 or driven gear 112 tooth
Between the distance between groove can produce different discharge capacities.In the left pump cover 102 at oil-out, right pump cover 117, baffle plate
Hole a and hole c, its mesopore a and hole c is had to be connected with fuel tank on A106A and baffle plate B106B respectively.In the left pump at oil-in
Lid 102, right pump cover 117, have respectively on baffle plate A106A and baffle plate B106B hole b and hole d, its mesopore b and hole d respectively with variable control
Two-position two-way solenoid valve A202 in molding block A2, displacement variation control module B3 is connected with two-position two-way solenoid valve B302.Hole b and hole
D is connected with oil pressure.
(2) displacement variation control module A
Referring to Fig. 7, displacement variation control module A2 includes：Type pilot ratio electromagnetic type pressure-control valve A201, bi-bit bi-pass electricity
Magnet valve A202；
The oil-in of type pilot ratio electromagnetic type pressure-control valve A201 is connected with the oil-out of variable machinery module 1.First
The oil-out of conductivity type ratio electromagnetic type pressure-control valve A201 is connected with the oil-in of two-position two-way solenoid valve A202.Bi-bit bi-pass
The oil-out of magnetic valve A202 is connected with hole b.When two-position two-way solenoid valve A202 is in " breaking " state, the oil pressure in the b of hole is
Normal pressure, piston rod will not be embedded in driven gear 112 inter-tooth slots.When two-position two-way solenoid valve A202 is in " leading to " state,
Control type pilot ratio electromagnetic type pressure-control valve A201 by changing electric current, and then can adjust and live with the oil pressure of adjustment hole b
Stopper rod embeds the distance between driven gear 112 inter-tooth slots, makes gear pump obtain different discharge capacities.
(3) displacement variation control module B
Referring to Fig. 7, displacement variation control module B3 includes：Type pilot ratio electromagnetic type pressure-control valve B301, bi-bit bi-pass electricity
Magnet valve B302；
The oil-in of type pilot ratio electromagnetic type pressure-control valve B301 is connected with the oil-out of variable machinery module 1.First
The oil-out of conductivity type ratio electromagnetic type pressure-control valve B301 is connected with the oil-in of two-position two-way solenoid valve B302.Bi-bit bi-pass
The oil-out of magnetic valve B302 is connected with hole d.When two-position two-way solenoid valve B302 is in " breaking " state, the oil pressure in the d of hole is
Normal pressure, piston rod will not be embedded in driving gear 111 gear inter-tooth slots.When two-position two-way solenoid valve B302 is in " leading to " state
When, control type pilot ratio electromagnetic type pressure-control valve B301 by changing electric current, and then can be adjusted with the oil pressure of adjustment hole d
Whole piston rod embeds the distance between driving gear 111 inter-tooth slots, makes gear pump obtain different discharge capacities.
The operation principle of the present invention：
The principle that the present invention realizes variable is, for the gear pump of a determination, its working chamber volume is constant, is driving electricity
In the case that machine rotating speed is constant, using changing, piston rod embeds driving gear 111 or the length of driven gear 112 inter-tooth slots changes
Become the size of working chamber volume, and then change discharge capacity it is achieved that the precise control of gear pumpage.
During work, motor drives intermeshing driving gear 111 to rotate with driven gear 112, is separately installed with piston
The piston rod mounting disc A109A of bar group A107A and piston rod group B107B and piston rod mounting disc B109B is also with driving gear
111 and driven gear 112 synchronous axial system.When driving gear 111 and driven gear 112 exit the position of engagement, move to hole b
Or piston rod one end of hole d is subject to the oil pressure of hole b or hole d, other end is subject to the oil pressure of oil sucting cavity.Due to oil in hole b and hole d
Pressure is adjustable and higher than normal pressure, the oil pressure of oil sucting cavity is normal pressure, leads to two ends piston rod inside and outside generation pressure reduction, and piston rod compresses bullet
Spring, moves axially, and until reaching balance, piston rod embeds in driving gear 111 or driven gear 112 inter-tooth slots.Then
Piston rod continues with piston rod mounting disc A109A and piston rod mounting disc B109B motion, and away from hole b or hole d, piston rod is pacified
Sabot A109A and piston rod mounting disc B109B, baffle plate A106A, baffle plate B106B, main pump body 103, driving gear 111, driven tooth
Wheel 112 constitutes the space of sealing, and piston rod leaves hole b or hole d and reaches balance in this sealing space.In driving gear
111 and driven gear 112 when will enter at the position of engagement, the piston rod one end moving to hole a or hole c is subject to hole a or hole c
Oil pressure, other end be subject to pumping cavity oil pressure.Because hole a is connected with fuel tank with hole c, its oil pressure is normal pressure, pumping cavity
Oil pressure is high pressure, produces pressure reduction, and piston rod is subject to the restoring force of spring simultaneously, causes piston rod to be forced out inter-tooth slots, thus protecting
Card driving gear 111 and driven gear 112 normally engage.
According to the oil pressure state of hole b and hole d, the present invention has three kinds of working methods：
1st, working method 1：The oil pressure of hole b and hole d is normal pressure.Under this kind of working method, due to the active force of spring, live
Stopper rod is in the state being forced out driving gear 111 and driven gear 112 inter-tooth slots all the time, and gear pump with variable capacity discharge capacity is maximum,
Rotating speed one timing, maximum flow now, its effect is equal to common gear pump.
2nd, working method 2：The oil pressure of hole b is normal pressure, and the oil pressure of hole d is the oil pressure of controllable high-voltage or hole b is controllable high-voltage,
The oil pressure of hole d is normal pressure.In this mode of operation, the piston rod of piston rod group A107A or piston rod group B107B can occur axle
To movement.
The advantage of this working method：Displacement control high precision, for realizing equal changes in flow rate, compared to working method 3,
The pressure range of required change is larger, facilitates implementation accurate adjustment and controls.The deficiency of this working method：Displacement control scope is relatively
Working method 3 is half as large.
3rd, working method 3：The oil pressure of hole b and hole d is controllable high-voltage, in this mode of operation, piston rod group A107A
All can move axially with the piston rod of piston rod group B107B.
The advantage of this working method：Displacement control scope is twice compared with working method 2.The deficiency of this working method：Discharge capacity
Control accuracy is low, and for realizing equal changes in flow rate, compared to working method 2, the pressure range of required change is less.
The foregoing is only several specific embodiments of the present invention, above example is only used for the technical scheme to present aspect
Explain and unrestricted scope of the presently claimed invention with inventive concept.All technical staff in the art are in this patent
Prior art is combined on the basis of inventive concept, by logic analysis, reasoning or limited experimentation available other technologies scheme,
Also should be regarded as falling within the claims of the present invention.
Claims (1)
1. in the case of a kind of invariablenes turning speed, realize the gear pump with variable capacity of gear pumpage precise control it is characterised in that：Described change
Flux gear pump includes：Variable machinery module (1), displacement variation control module A (2) and displacement variation control module B (3)；
Variable machinery module (1) includes, bolt A (101A), bolt B (101B), bolt C (101C), bolt D (101D), bolt E
(101E), left pump cover (102), main pump body (103), bearing A (104A), bearing B (104B), bearing C (104C), bearings D
(104D), axle sleeve A (105A), axle sleeve B (105B), axle sleeve C (105C), axle sleeve D (105D), baffle plate A (106A), baffle plate B
(106B), piston rod group A (107A), piston rod group B (107B), groups of springs A (108A), groups of springs B (108B), piston rod are installed
Disk A (109A), piston rod mounting disc B (109B), swing link A (110A), swing link B (110B), driving gear (111), driven
Gear (112), driving shaft (113), driven shaft (114), key A (115A), key B (115B), felt (116), right pump cover (117),
Hole a, hole b, hole c, hole d；
Left pump cover (102) and right pump cover (117) pass through bolt A (101A), bolt B (101B), bolt C (101C), bolt D
(101D), bolt E (101E) is connected to main pump body (103), and defines a working chamber in main pump body (103)；Main pump body
(103) there are two mouths on, be oil-out and oil-in respectively, the working chamber being connected with oil-out is pumping cavity, with oil-in phase
Working chamber even is oil sucting cavity；It is mounted on alignment pin on piston rod mounting disc A (109A) and piston rod mounting disc B (109B)
Nail, is coordinated it is ensured that piston rod with the dowel hole on driving gear (111) and driven gear (112) during installation respectively
Mounting disc A (109A) and the standard of piston rod mounting disc B (109B) and driving gear (111) and driven gear (112) relative position
Really, both synchronous axial system are made；Bearing A (104A), bearing B (104B), bearing C (104C) and bearings D (104D) are separately fixed at
In bearing block in left pump cover (102) and right pump cover (117), and it is equipped with positioning shaft sleeve A (105A), axle sleeve B (105B), axle sleeve C
(105C) with axle sleeve D (105D)；Driving shaft (113), driving gear (111) pass through key A with piston rod mounting disc A (109A)
(115A) connect；Driven shaft (114), driven gear (112) are connected by key B (115B) with piston rod mounting disc B (109B)；Main
Moving gear (111) is engaged each other with driven gear (112), and Motor drive driving gear (111) drives driven gear (112) to turn
Dynamic, and the modulus of driving gear (111) and driven gear (112), the number of teeth, gear width all same；Driving shaft (113) and bearing
A (104A) and bearing B (104B) interference fit are to ensure to be accurately positioned；Driving shaft (113) external part is connected with motor, and uses hair
Felt (116) seals；Driven shaft (114) and bearing C (104C) and bearings D (104D) interference fit are to ensure to be accurately positioned；Piston
Bar mounting disc A (109A) and piston rod mounting disc B (109B) are cylinder, respectively with swing link A (110A) and swing link B
(110B) negative area is coordinated；Baffle plate A (106A) and baffle plate B (106B) is respectively placed in main pump body (103) working chamber
In left and right two ends, and embedded main pump body (103)；All arrange on piston rod mounting disc A (109A) and piston rod mounting disc B (109B)
Arrange a number of piston hole；The piston rod quantity of piston rod group A (107A) and piston rod group B (107B), groups of springs A
(108A) and on the number of springs of groups of springs B (108B) and piston rod mounting disc A (109A) and piston rod mounting disc B (109B)
Piston hole count all identical with the number of teeth of gear；The spring of groups of springs A (108A) and groups of springs B (108B) is respectively fitted over piston rod
On the piston rod of group A (107A) and piston rod group B (107B), then it is placed on piston rod mounting disc A (109A) respectively and lives
In piston hole on stopper rod mounting disc B (109B)；Piston rod can move axially in piston hole, and the one of piston rod
Partly can move in the inter-tooth slots of gear；Adjustment piston rod embeds driving gear (111) or driven gear (112) inter-tooth slots
The distance between can produce different discharge capacities；In the left pump cover (102) at oil-out, right pump cover (117), baffle plate A
(106A) and hole a and hole c, its mesopore a and hole c is had to be connected with fuel tank respectively on baffle plate B (106B)；On the left side at oil-in
Hole b and hole d, its mesopore b and hole d is had to divide respectively on pump cover (102), right pump cover (117), baffle plate A (106A) and baffle plate B (106B)
Two-position two-way solenoid valve A (202) not and in displacement variation control module A (2), displacement variation control module B (3) and two-position two-way solenoid valve
B (302) is connected；Hole b and hole d is connected with oil pressure；
Displacement variation control module A (2) includes, type pilot ratio electromagnetic type pressure-control valve A (201), two-position two-way solenoid valve A
(202)；
The oil-in of type pilot ratio electromagnetic type pressure-control valve A (201) is connected with the oil-out of variable machinery module (1)；First
The oil-out of conductivity type ratio electromagnetic type pressure-control valve A (201) is connected with the oil-in of two-position two-way solenoid valve A (202)；Two
The oil-out of two-way electromagnetic valve A (202) is connected with hole b；When two-position two-way solenoid valve A (202) is in " breaking " state, in the b of hole
Oil pressure be normal pressure, piston rod will not be embedded in driven gear (112) inter-tooth slots；When two-position two-way solenoid valve A (202) is in
During " leading to " state, control type pilot ratio electromagnetic type pressure-control valve A (201) by changing electric current, and then can be with adjustment hole b
Oil pressure, adjustment piston rod embeds the distance between driven gear (112) inter-tooth slots, makes gear pump obtain different discharge capacities；
Displacement variation control module B (3) includes：Type pilot ratio electromagnetic type pressure-control valve B (301), two-position two-way solenoid valve B
(302)；
The oil-in of type pilot ratio electromagnetic type pressure-control valve B (301) is connected with the oil-out of variable machinery module (1)；First
The oil-out of conductivity type ratio electromagnetic type pressure-control valve B (301) is connected with the oil-in of two-position two-way solenoid valve B (302)；Two
The oil-out of two-way electromagnetic valve B (302) is connected with hole d；When two-position two-way solenoid valve B (302) is in " breaking " state, in the d of hole
Oil pressure be normal pressure, piston rod will not be embedded in driving gear (111) gear inter-tooth slots；When two-position two-way solenoid valve B (302)
When being in " leading to " state, control type pilot ratio electromagnetic type pressure-control valve B (301) by changing electric current, and then can adjust
The oil pressure of knothole d, adjustment piston rod embeds the distance between driving gear (111) inter-tooth slots, makes gear pump obtain different rows
Amount；
The operation principle of gear pump with variable capacity is as follows：
For the gear pump of a determination, its working chamber volume is constant, in the case that motor rotating speed is constant, using change
Piston rod embeds the length of driving gear (111) or driven gear (112) the inter-tooth slots size to change working chamber volume, and then
Change discharge capacity it is achieved that the precise control of gear pumpage；
During work, motor drives intermeshing driving gear (111) to rotate with driven gear (112), is separately installed with piston
Piston rod mounting disc A (109A) of bar group A (107A) and piston rod group B (107B) and piston rod mounting disc B (109B) also with
Driving gear (111) and driven gear (112) synchronous axial system；Exit engagement in driving gear (111) and driven gear (112)
During position, the piston rod one end moving to hole b or hole d is subject to the oil pressure of hole b or hole d, and other end is subject to the oil pressure of oil sucting cavity；
Because in hole b and hole d, oil pressure is adjustable and be higher than normal pressure, the oil pressure of oil sucting cavity is normal pressure, leads to that two ends piston rod is inside and outside to produce pressure
Difference, piston rod compression spring, move axially, until reaching balance, piston rod embeds driving gear (111) or driven gear
(112) in inter-tooth slots；Then piston rod continues to move with piston rod mounting disc A (109A) and piston rod mounting disc B (109B),
Away from hole b or hole d, piston rod mounting disc A (109A) and piston rod mounting disc B (109B), baffle plate A (106A), baffle plate B
(106B), main pump body (103), driving gear (111), driven gear (112) constitute the space of sealing, and piston rod leaves hole b
Or hole d reaches balance in this sealing space；The position of engagement will be entered in driving gear (111) and driven gear (112)
When putting place, the piston rod one end moving to hole a or hole c is subject to the oil pressure of hole a or hole c, and other end is subject to the oil pressure of pumping cavity；
Because hole a is connected with fuel tank with hole c, its oil pressure is normal pressure, and the oil pressure of pumping cavity is high pressure, produces pressure reduction, piston rod is subject to simultaneously
To the restoring force of spring, piston rod is caused to be forced out inter-tooth slots, thus just ensureing driving gear (111) and driven gear (112)
Often engage；
Described gear pump with variable capacity has three kinds of working methods：
1st, working method 1：The oil pressure of hole b and hole d is normal pressure；Under this kind of working method, due to the active force of spring, piston rod
All the time it is in the state being forced out driving gear (111) and driven gear (112) inter-tooth slots, gear pump with variable capacity discharge capacity is maximum,
Rotating speed one timing, maximum flow now, its effect is equal to common gear pump；
2nd, working method 2：The oil pressure of hole b is normal pressure, and the oil pressure of hole d is the oil pressure of controllable high-voltage or hole b is controllable high-voltage, hole d
Oil pressure be normal pressure；In this mode of operation, the piston rod of piston rod group A (107A) or piston rod group B (107B) can occur
Axial movement；
3rd, working method 3：The oil pressure of hole b and hole d is controllable high-voltage, in this mode of operation, piston rod group A (107A) and
The piston rod of piston rod group B (107B) all can move axially.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310505250.6A CN103498793B (en) | 2013-10-24 | 2013-10-24 | Variable gear pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310505250.6A CN103498793B (en) | 2013-10-24 | 2013-10-24 | Variable gear pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103498793A CN103498793A (en) | 2014-01-08 |
| CN103498793B true CN103498793B (en) | 2017-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310505250.6A Expired - Fee Related CN103498793B (en) | 2013-10-24 | 2013-10-24 | Variable gear pump |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110001018A (en) * | 2019-05-10 | 2019-07-12 | 宁波佰氏微泡注塑科技有限公司 | A kind of SCF flow controller and control method |
| CN115199529A (en) * | 2022-06-27 | 2022-10-18 | 中国航发哈尔滨东安发动机有限公司 | Gear pump structure with axial oil inlet |
| CN115773240B (en) * | 2023-02-02 | 2023-04-14 | 仪征威业油泵油嘴有限公司 | Oil pump convenient to adjust |
| CN116606009B (en) * | 2023-04-27 | 2023-11-03 | 江苏华达环境工程有限公司 | Integrated equipment and process for garbage leachate treatment |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3840909A1 (en) * | 1987-12-17 | 1989-06-29 | Volkswagen Ag | Gear pump with delivery rate control |
| CA2159672C (en) * | 1994-10-17 | 2009-09-15 | Siegfried A. Eisenmann | A valve train with suction-controlled ring gear/internal gear pump |
| DE102007036608A1 (en) * | 2007-08-02 | 2009-02-05 | Jakob Neu | Gearwheel pump with variable flow volumes has displacement arrangement in tooth gaps with variable displacement volumes connected to control chamber in base body |
| JP4649520B2 (en) * | 2009-04-10 | 2011-03-09 | 本田技研工業株式会社 | Gear pump |
| IT1394335B1 (en) * | 2009-04-15 | 2012-06-06 | Vhit Spa | FLUID MACHINE WITH VARIABLE CAPACITY |
| CN101701581A (en) * | 2009-10-21 | 2010-05-05 | 安徽工业大学 | Intelligent adjustable variable flow gear pump device |
| DE102011013756A1 (en) * | 2011-03-12 | 2012-09-13 | Volkswagen Aktiengesellschaft | Gear pump, particularly oil pump for internal combustion engine, has control valve, which is additionally connected with outlet over throttle in position of piston for connecting control fluid in fluid conducting manner |
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| CN103498793A (en) | 2014-01-08 |
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