CN109899267A - A kind of EHA driving plunger pump and its control method - Google Patents
A kind of EHA driving plunger pump and its control method Download PDFInfo
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- CN109899267A CN109899267A CN201910174095.1A CN201910174095A CN109899267A CN 109899267 A CN109899267 A CN 109899267A CN 201910174095 A CN201910174095 A CN 201910174095A CN 109899267 A CN109899267 A CN 109899267A
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Abstract
The invention discloses a kind of EHA driving plunger pump and its control method, EHA drives plunger pump by cylinder body, integral type flat valve, outfall sewer, oil distrbuting box, oil path block, servo motor, pedestal, water inlet manifold, cylinder barrel, pump group plunger, hydraulic cylinder, support plate, cylinder plunger bar, the composition such as rod end ball bearing.EHA drives plunger pump using EHA as driving device, realizes the function of discharging water to drive pump group plunger motion by the movement that bidirectional hydraulic pumps control hydraulic cylinder；By SERVO CONTROL, the forward and backward and speed governing operation of motor can control.When pump group plunger is moved back and forth with specific motion planning, an end plug is in water suction operating condition, and the inlet valve in corresponding integral type flat valve is opened, and fluid sucks working media from the total suction hose of system by the flow-guiding channel of cylinder interior；The present invention can satisfy the complex working condition of warship marine pump, greatly improve the application prospect in fields such as naval vessels ship, deep-sea explorations of EHA driving plunger pump system.
Description
Technical field
The present invention relates to a kind of EHA to drive plunger pump, suitable for the liquid using sea, fresh water, mineral oil etc. as working media
Pressure system has wide application prospect in fields such as naval vessels ship, deep-sea exploration, fire-fighting fire extinguishings.
Background technique
In various commercial plants and Ship System, pump is a kind of mechanical equipment being most widely used.With ship
The diversification of enlargement and ship function, especially for the special operating condition of military boats and ships, to the volume weight of naval vessel hydraulic pump,
It is operational shock and pipeline pulsation, lesser mechanical noise and fluid noise, enough impact resistances, good corrosion-resistant and resistance to
Abrasion properties and reliable sealing structure and sealing performance etc. are proposed special requirement.
Currently, the power end of traditional plunger pump, most of using hydraulic system, crank link mechanism or cam mechanism.
But the power end of cam mechanism is easy to wear, thus reliability is low, and still has flow pulsation；Crank connecting link plunger pump discharge
Greatly, pressure fluctuation is also big；There are reversing impacts for hydraulic planger pump, cause the pulsation and pump housing vibration of flow and pressure, hydraulic pressure system
Hydraulic Elements high failure rate, the functional reliability of system are poor, seal life is short, and hydraulic oil is easy leakage, answer so being difficult to promote
With.The existing system structure of traditional marine pump, big, weight that there is also volumes is greatly, maintenance difficult, low efficiency, noise are high, control is non-
The defects of intelligent.Therefore a kind of EHA driving plunger pump comes into being.
EHA driving plunger pump directly drives pump group plunger using EHA, with integrated flat valve, cylinder barrel, pipeline and
Cylinder body is formed by combining.Overall construction design is compact, easy for installation.Cylinder body and cylinder body pedestal use lightweighting materials, make entirety
Quality, which is realized, to be mitigated.There is no servo valve in EHA system, the revolving speed by adjusting motor realizes the SERVO CONTROL to whole system,
Not only the complexity of hydraulic system can have been reduced, but also due to using symmetrical hydraulic cylinder as executing agency, system spill losses can
It ignores, alleviates due to bring heat dissipation problem after system integration.According to actual use demand, system can be used vertical
Formula mounting structure, further decreases area occupied.
The motion mode that each motor is planned by control system changes the motion profile and phase of each piston, realizes
Flow adjusts and the functions such as automation control.Compared with traditional marine pump, vibration damping and in terms of it is with the obvious advantage.EHA
System uses high speed low rotor inertia brshless DC motor and high performance hydraulic pump, also very big while reducing actuator volume
The performance of whole system is improved in degree, therefore EHA driving plunger pump is compared to the knot of traditional " rotating electric machine+transmission device "
Structure has various advantages, as small in size, noise is low, light-weight, intelligent control etc..It is contemplated that the invention patent is flowing
It is with a wide range of applications in body transmission and Mechatronic Systems.
Summary of the invention
The invention aims to solve, existing tradition pump configuration peculiar to vessel is numerous and jumbled, weight is big, maintenance difficult, vibration noise
Greatly, it is not easy the problems such as realizing automation control.Using EHA as execution unit, the structure type of plunger pump is explored, carries out structure
Fluid-transmission field multiple technologies problem can be effectively relieved in optimization design.
The present invention provides a kind of EHA driving plunger pump, and EHA driving plunger pump includes mechanical system and control system,
Mechanical system includes support plate, supports the cylinder body of board ends, integral type flat valve and cylinder barrel on cylinder body, in cylinder barrel
The pump group plunger of interior reciprocating motion, the outfall sewer and water inlet manifold being connect with cylinder body, and driving pump group piston reciprocation movement
Electrical hydrostatic actuator (EHA),
Electrical hydrostatic actuator (EHA) includes oil distrbuting box, hydraulic pump, oil path block, servo motor, hydraulic cylinder and overflow valve
And check valve, oil distrbuting box and servo motor are separately fixed at left and right sides of oil path block by screw, hydraulic pump is mounted on oil distrbuting box
Inside is equipped with overflow valve on oil path block, and oil path block and hydraulic cylinder are fixed by screws in together, hydraulic cylinder piston rod both ends point
Not Tong Guo rod end ball bearing connect with pump group plunger, driving pump group piston reciprocation movement,
Control system includes digital signal processor (DSP), and the digital signal processor (DSP) is for controlling servo electricity
Machine.
EHA driving plunger pump point left and right sides structure, support plate are arranged in centre, and every side is arranged side by side centainly vertically
The Electrical hydrostatic actuator (EHA) of quantity and the cylinder barrel and pump group plunger of respective numbers.
On the supporting plate, support board ends install cylinder body for Electrical hydrostatic actuator (EHA) installation, are provided with square on cylinder body
Shape slot, with installation and positioning support plate.
Respectively arrange that a cylinder body, cylinder barrel and integral type flat valve are mounted on cylinder body at the support plate upper and lower end face, cylinder
There is flow-guiding channel in internal portion, which is connected to outfall sewer and water inlet manifold respectively by pipeline, outfall sewer and into
Supply mains passes through pipe clamp respectively and is fixed on cylinder body, completes internal water suction and drainage works by inlet and outlet.
Cylinder interior includes water inlet flow channel, water inlet flow channel, outlet passage, outlet passage, safety valve mounting hole, flow valve opening
And cylinder barrel hole, water inlet flow channel and water inlet flow channel are left and right sides water inlet branch flow passage respectively, and total external inlet pipeline of water inlet flow channel is left
Right two sides share outlet passage, and outlet passage is connected to outlet passage, the external outlet pipeline of outlet passage, the connection of safety valve mounting hole
The mountable safety valve of outlet passage, integral type flat valve are mounted in flow valve opening, and with end cap fixing seal, it is solid that cylinder barrel crosses screw
It is scheduled in cylinder barrel hole.
The Electrical hydrostatic actuator (EHA) is integrated integrated morphology, and hydraulic pump is completely enclosed in oil distrbuting box.
The rapidoprint of the cylinder body, integral type flat valve, oil path block, cylinder barrel, pump group plunger, support plate selects lightweight
Metal material.
The rapidoprint of the cylinder body, integral type flat valve, oil path block, cylinder barrel, pump group plunger, support plate selects titanium to close
Gold.
The present invention also provides a kind of control methods of EHA driving plunger pump, control the servo motor of EHA by controller
Revolving speed drives the rotary motion of bidirectional hydraulic pump by servo motor, then controls the high pressure oil that hydraulic pump is output to hydraulic cylinder
Flow, complete the motion control to hydraulic cylinder in a manner of volumetric speed control, and then realize the speed regulation to pump group plunger, pump group
When plunger is moved back and forth with specific motion planning, the pump group plunger of one end is in water suction operating condition, corresponding integral type flat valve
In inlet valve open, fluid sucks working media from system water inlet manifold by the flow-guiding channel of cylinder interior；At the same time,
The pump group plunger of the other end is in draining operating condition, and the discharge van in corresponding integral type flat valve is opened, and fluid passes through in cylinder body
Working media is discharged from system total outlet pipe in portion's flow-guiding channel.
The control signal that EHA driving all EHA of plunger pump system are provided according to control system, with trapezoidal wave or other movements
Curve planning is moved with certain phase difference, makes entire EHA driving plunger pump imbibition and drain, double-action plunger pump may be implemented
Theoretically export constant flow rate.
Support plate uses engraved structure, and the rapidoprints of the main parts sizes such as cylinder body, pedestal selects titanium alloy or other are light
Quantify metal, significantly reduces overall weight under the premise of guaranteeing system structure stability.1 bottom surface of cylinder body is provided with rectangular channel,
Facilitate the installation and positioning of support plate.15 energy of rod end ball bearing connected between EHA hydraulic cylinder piston rod 14 and pump group plunger 11
Enough small ranges in space twist, and EHA driving plunger pump system is made to have the function of Self-aligning within the scope of little deviation.
The beneficial effects of the present invention are:
System, as driving device, the movement of control hydraulic cylinder is pumped by bidirectional hydraulic, to substantially reduce liquid using EHA
Volume, the weight of press pump；By SERVO CONTROL, the forward and backward and speed governing operation of motor can control, cancel hydraulicdirectional control valve, subtract
Pressure valve etc. controls valve member, external there is only power supply and signal transmission interface, has the excellent of hydraulic actuation system and electrical actuation and control system concurrently
Point, system composition significantly simplify, and equipment volume greatly reduces, and structure is compact to design and easy to disassemble and overhauls.
The revolving speed of servo motor is controlled by controller, it is easy to accomplish flow adjusts and the function such as automation control and monitoring
Energy.When pump group plunger motion is to end of travel, since commutation can generate temporary impact, it is arranged symmetrically using multiple moving cells
Form, the effect for offsetting impact can be generated in mechanical structure, effectively reduces entire system shock vibration and noise.
EHA drives plunger pump system since EHA driving unit quantity is more, has redundancy feature, and whole system pair
Title formula arrangement, when so that componental movement unit breaking down, still is able to export by the curve movement of Planning adaptation stable
Flow keeps the working condition of EHA driving plunger pump system low vibration low noise.
The components such as cylinder body, pedestal and flat valve are optimized using lightweights metal materials such as titanium alloys, and by loss of weight
Design mitigates weight as far as possible, meets the complex working condition of warship marine pump, pole in the case where guaranteeing system overall stability
The big application prospect in fields such as naval vessels ship, deep-sea explorations for improving EHA driving plunger pump system.
Detailed description of the invention
Fig. 1 is a kind of EHA driving plunger pump structure figure of the present invention,
Fig. 2 is the front view of structure of the invention figure,
Fig. 3 is a kind of structure diagram of EHA driving plunger pump cylinder body of the present invention.
Wherein: 1, cylinder body, 2, integral type flat valve, 3, outfall sewer, 4, oil distrbuting box, 5, oil path block, 6, servo motor, 7,
Water outlet, 8, pedestal, 9, water inlet manifold, 10, cylinder barrel, 11, pump group plunger, 12, hydraulic cylinder, 13, support plate, 14, hydraulic cylinder work
Stopper rod, 15, rod end ball bearing, 16, water inlet.
17, the first water inlet flow channel, the 19, second water inlet flow channel, the 18, first outlet passage, the 23, second outlet passage, 20, match
Flow valve opening, 21, safety valve mounting hole, 22, total water inlet flow channel, 24, cylinder barrel hole.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
A kind of EHA driving plunger pump, the plunger pump are made by cylinder body 1, integral type flat valve 2, outfall sewer 3, electronic hydrostatic
Dynamic device, pedestal 8, water inlet manifold 9, cylinder barrel 10, pump group plunger 11, support plate 13, cylinder plunger bar 14 and rod end ball bearing 15
Composition.
Three Electrical hydrostatic actuators i.e. three EHA are arranged in the symmetrical structure in the plunger pump point left and right sides, every side,
Each Electrical hydrostatic actuator unit is integrated by oil distrbuting box 4, hydraulic pump, check valve, oil path block 5, servo motor 6, hydraulic cylinder 12
Design is integrated.Hydraulic pump and servo motor 6 are fixed by screws in 5 two sides of oil path block, hydraulic pump and servo respectively
Motor 6 is connected by shaft coupling.Check valve is mounted on hydraulic pump.Oil distrbuting box 4 is fixed by screws in 5 side of oil path block,
It is completely enclosed within hydraulic pump, fully closed structure has been effectively ensured hydraulic pump and has run in the environment of closing, it is possible to provide permanent,
Non-maintaining service life.The position of the oil inlet and outlet positioning oil path block 5 of hydraulic cylinder 12, is fixed by screws on oil path block 5.
In the description of the present invention it is to be appreciated that three electronic hydrostatic actuations are arranged in vertical mounting means and every side
Device EHA is only to be not limited only to vertical installation based on a concrete case in attached drawing and every side arranges that three electronic hydrostatics are made
Dynamic device EHA, can arrange as the case may be, thus be not considered as limiting the invention.
As shown in Fig. 1, every EHA, which is connected by screw to, is fixed in support plate 13.Every EHA hydraulic cylinder piston rod 14
Both ends are connect with two pump group plungers 11 by rod end ball bearing 15 respectively.A cylinder is respectively arranged at 13 upper and lower end face of support plate
Body 1, support plate 13 is by the fixed upper lower cylinder body 1 of screw and plays a supporting role.
As shown in Fig. 3, flow-guiding channel is equipped with inside cylinder body 1, flow-guiding channel is divided into water inlet flow channel and outlet passage.Runner
A17, runner b19 and runner c22 are water inlet flow channel, and runner c22 is total water inlet flow channel.First water inlet flow channel 17 and the second feed water flow
Road 19 is the water inlet branch flow passage of the left and right sides respectively, and the first water inlet flow channel 17 and the second water inlet flow channel 19 are respectively communicated with total water inlet
Runner, total external water inlet manifold 9 of water inlet flow channel.Runner d18, runner e21 and runner f23 are outlet passage, and three runners are mutual
Connection.The left and right sides pump housing shares total outlet passage 18, and total outlet passage 18 is connected to total outlet passage f23, and runner f23 is always to go out
Water flow passage, total external outfall sewer 3 of outlet passage.Water suction and drainage works are completed finally by water inlet 16 and water outlet 7.
Runner e21, when system discharge pressure is excessive, plays safeguard protection for installing safety valve.Outfall sewer 3 and water inlet manifold
9 are fixed on cylinder body 1 by pipe clamp respectively.Integral type flat valve 2 is mounted in flow valve opening 20, with end cap fixing seal.Cylinder
Cylinder 10 is fixed by screws in cylinder barrel hole 24.It is sealed between pump group plunger 11 and cylinder barrel 10 by dynamic seal ring.
The revolving speed of the servo motor of EHA is controlled by controller, motor drives the rotary motion of bidirectional hydraulic pump, then controls
System pump is output to the flow of the high pressure oil of hydraulic cylinder, the motion control to hydraulic cylinder is completed in a manner of volumetric speed control, and then realize
To the speed regulation of pump group plunger.When pump group plunger is moved back and forth with specific motion planning, an end plug is in water suction operating condition,
Inlet valve in corresponding integral type flat valve is opened, and fluid is sucked by the flow-guiding channel of cylinder interior from the total suction hose of system
Working media；At the same time, another end plug is in draining operating condition, and the discharge van in corresponding integral type flat valve is opened, stream
Working media is discharged from system total outlet pipe by cylinder interior flow-guiding channel in body.
When an EHA cylinder piston rod is moved upwards according to setting speed, lower end pump group plunger enters water suction stroke, on
End pump group plunger enters draining stroke.In a cycle, EHA cylinder piston rod is moved back and forth once, and both ends pump group plunger is complete
It is each primary at imbibition, drain operating condition.
Similarly, the control signal that other several EHA are also provided according to control system is advised with trapezoidal wave or other curve movements
It draws and is moved with certain phase difference, make entire EHA driving plunger pump imbibition and drain, double-action plunger pump may be implemented theoretically
Constant flow rate can be exported.
EHA drives plunger pump system since EHA execution unit quantity is more, has redundancy feature, and whole system pair
Title formula arrangement, when so that componental movement unit breaking down, still is able to export by the curve movement of Planning adaptation stable
Flow keeps the working condition of EHA driving plunger pump system low vibration low noise.
The components such as cylinder body, pedestal and the integral type flat valve of a kind of EHA driving plunger pump system are using titanium alloy etc.
Lightweight metal material, and by loss of weight optimization design, in the case where guaranteeing system overall stability, mitigate weight as far as possible
Amount, meets the complex working condition of warship marine pump.
The above description is only an embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
Equivalent structure made by bright specification and accompanying drawing content or equivalent method transformation, are applied directly or indirectly in other relevant skills
Art field, is included within the scope of the present invention.
Claims (10)
1. a kind of EHA drives plunger pump, it is characterised in that: EHA driving plunger pump includes mechanical system and control system,
Mechanical system includes support plate (13), the cylinder body (1) at support plate (13) both ends, the integral type flat valve (2) on cylinder body (1)
With cylinder barrel (10), the pump group plunger (11) moved back and forth in the cylinder barrel (10), the outfall sewer (3) being connect with cylinder body (1) and into
Supply mains (9), and the Electrical hydrostatic actuator that driving pump group plunger (11) moves back and forth,
Electrical hydrostatic actuator includes oil distrbuting box (4), hydraulic pump, oil path block (5), servo motor (6), hydraulic cylinder (12), and is overflow
Valve and check valve are flowed, oil distrbuting box (4) and servo motor (6) are separately fixed at left and right sides of oil path block (5), and hydraulic pump, which is mounted on, matches
Fuel tank (4) is internal, is equipped with overflow valve on oil path block (5), and oil path block (5) and hydraulic cylinder (12) are fixed together, and hydraulic cylinder is living
Stopper rod (14) both ends pass through rod end ball bearing (15) respectively and connect with pump group plunger (11), and driving pump group plunger (11) is back and forth transported
It is dynamic,
Control system includes digital signal processor, and the digital signal processor is for controlling servo motor (6).
2. a kind of EHA according to claim 1 drives plunger pump, it is characterised in that: EHA drives the plunger pump point left and right sides
Structure, support plate (13) are arranged in centre, and every side is arranged side by side a certain number of Electrical hydrostatic actuators and respective numbers vertically
Cylinder barrel (10) and pump group plunger (11).
3. a kind of EHA according to claim 1 drives plunger pump, it is characterised in that: the Electrical hydrostatic actuator installation
On support plate (13), cylinder body (1) is installed at support plate (13) both ends, and cylinder body is provided with rectangular channel on (1), with installation and positioning support
Plate (13).
4. a kind of EHA according to claim 1 drives plunger pump, it is characterised in that: support plate (13) upper and lower end face
Locate one cylinder body (1) of each arrangement, cylinder barrel (10) and integral type flat valve (2) are mounted on cylinder body (1), are led inside cylinder body (1)
Circulation road, the flow-guiding channel are connected to outfall sewer (3) and water inlet manifold (9) respectively by pipeline, outfall sewer (3) and water inlet
General pipeline (9) is fixed on cylinder body (1) by pipe clamp respectively, by water inlet (16) and water outlet (7) complete internal water suction and
Drainage works.
5. a kind of EHA according to claim 1 drives plunger pump, it is characterised in that: include the first water inlet inside cylinder body (1)
Runner (17), the second water inlet flow channel (19), the first outlet passage (18), the second outlet passage (23), safety valve mounting hole (21),
Flow valve opening (20) and cylinder barrel hole (24), the first water inlet flow channel (17) and the second water inlet flow channel (19) are left and right sides water inlet respectively
Branch flow passage, the external inlet pipeline of total water inlet flow channel (22), the left and right sides share the first outlet passage (18), and outlet passage (18) is even
Pass-out water flow passage (23), outlet passage (23) external outlet pipeline, safety valve mounting hole (21) are connected to the first outlet passage (18)
Safety valve is installed, integral type flat valve (2) is mounted in flow valve opening (20), and with end cap fixing seal, cylinder barrel (10) passes through spiral shell
Nail is fixed in cylinder barrel hole (24).
6. a kind of EHA according to claim 1 drives plunger pump, it is characterised in that: the Electrical hydrostatic actuator is one
Body integrated morphology, hydraulic pump are completely enclosed in oil distrbuting box (4).
7. a kind of EHA according to claim 1 drives plunger pump, it is characterised in that: the cylinder body (1), integral type flow
The rapidoprint of valve (2), oil path block (5), cylinder barrel (10), pump group plunger (11), support plate (13) selects lightweight metal material.
8. a kind of EHA according to claim 7 drives plunger pump, it is characterised in that: the cylinder body (1), integral type flow
The rapidoprint of valve (2), oil path block (5), cylinder barrel (10), pump group plunger (11), support plate (13) selects titanium alloy.
9. a kind of control method of EHA driving plunger pump, it is characterised in that: control turning for the servo motor of EHA by controller
Speed drives the rotary motion of bidirectional hydraulic pump by servo motor, and then control hydraulic pump is output to the high pressure oil of hydraulic cylinder
Flow is completed the motion control to hydraulic cylinder in a manner of volumetric speed control, and then realizes the speed regulation to pump group plunger, pump group column
When plug is with the reciprocating motion of specific motion planning, the pump group plunger of one end is in water suction operating condition, corresponding integral type flat valve
Inlet valve open, fluid sucks working media from system water inlet manifold by the flow-guiding channel of cylinder interior；At the same time, separately
The pump group plunger of one end is in draining operating condition, and the discharge van in corresponding integral type flat valve is opened, and fluid passes through cylinder interior
Working media is discharged from system total outlet pipe in flow-guiding channel.
10. a kind of control method of EHA driving plunger pump according to claim 9, it is characterised in that: EHA drives plunger
The control signal that all EHA of pumping system are provided according to control system, with trapezoidal wave or the planning of other curve movements with certain phase
Potential difference movement makes entire EHA driving plunger pump imbibition and drain, realizes that double-action plunger pump theoretically exports constant flow rate.
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| CN201910174095.1A CN109899267A (en) | 2019-03-08 | 2019-03-08 | A kind of EHA driving plunger pump and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910174095.1A CN109899267A (en) | 2019-03-08 | 2019-03-08 | A kind of EHA driving plunger pump and its control method |
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| CN201910174095.1A Pending CN109899267A (en) | 2019-03-08 | 2019-03-08 | A kind of EHA driving plunger pump and its control method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111185480A (en) * | 2020-03-06 | 2020-05-22 | 燕山大学 | Control unit and method for distributed modular electro-hydraulic actuator of rolling production line |
| CN113638935A (en) * | 2021-07-19 | 2021-11-12 | 南京航空航天大学 | Electro-hydrostatic actuator driven by magnetostrictive axial four-plunger pump and working method thereof |
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Application publication date: 20190618 |