CN202628686U

CN202628686U - Intelligent hydraulic power supply capable of outputting power in coincidence with load changes

Info

Publication number: CN202628686U
Application number: CN 201120570036
Authority: CN
Inventors: 万国强; 娄志林; 何跃新
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-12-30
Filing date: 2011-12-30
Publication date: 2012-12-26
Anticipated expiration: 2021-12-30

Abstract

The utility model discloses an intelligent hydraulic power supply capable of outputting power in coincidence with load changes and mainly solves the technical problems of low energy efficiency ratio and energy wastes during working of the traditional hydraulic power supply. According to the technical scheme, a plunger-type fuel pump of a hydraulic system is connected to a motor of a hydraulic power device; a programmable logic controller is connected with a three-position automatic valve, an electromagnetic ultrahigh pressure check valve and pressure sensors of the hydraulic system, and a control circuit of a frequency converter of the hydraulic power device; the programmable logic controller is used for controlling the frequency converter to adjust revolving speed of the motor and to change the output flow, and torque output by the motor under the control of the frequency converter is constant. The pressure of oil output by the plunger-type fuel pump within a rated pressure range changes in positive correlation with the working load changes of the hydraulic system, and the energy output by the power source coincides with the energy consumed by a working load. The intelligent hydraulic power supply is particularly suitable to be used as the hydraulic power supply of an intelligent tension system in prestressing construction of roads and railroad bridges.

Description

A kind of with the coincide full intelligent hydraulic power source of outputting power of loads change

Technical field

The utility model relates to a kind of intelligent hydraulic power source, entirely particularly a kind of intelligent hydraulic power source with the identical outputting power of loads change.

Background technique

At present, the hydraulic power supply of extensive use is a constant output power, overcomes operation mechanism's load, and the mechanism that pushes the work forward accomplishes its predetermined action.The hydraulic power supply working state is the long-term operation of start gear pump, adopts means adjustment hydraulic system working pressures and the required flow of work such as throttle valve when working load changes; Perhaps, adopt variable displacement pump to regulate flow, throttle valve adjustment pressure; Perhaps employing department clothes valve regulation flow and pressure satisfy the variation requirement of working load.

Though the demand that adopts automatic control technology to realize operation mechanism's compound action is also arranged in recent years, all mainly be that the means such as obeying adjusting of closing, take charge of of valve realize automation, accurately action in the employing controlled hydraulic system.The variation of having enriched actuator is extended in the hydraulics develop rapidly, and the conventional hydraulic power source is in the process of executing the task, and the waste of the energy is very general, and Energy Efficiency Ratio is very low to be undisputable fact.

Summary of the invention

The purpose of the utility model provides a kind of efficient, safe with the coincide full intelligent hydraulic power source of outputting power of loads change.

The utility model solves the technological scheme that its technical problem adopted: it comprises hydraulic system, hydraulic power unit and programmable controller 4; The plunger-type fuel pump 1 of hydraulic system is connected with the motor 2 of hydraulic power unit, and programmable controller 4 joins with the control circuit of the frequency variator 3 of three station self-acting valves 5, electromagnetism ultrahigh pressure one-way valve 7, pressure transducer 8 and the hydraulic power unit of hydraulic system respectively; Said hydraulic system comprises plunger-type fuel pump 1, three station self-acting valves 5, pressurize one-way valve 6, electromagnetism ultrahigh pressure one-way valve 7, pressure transducer 8, safety overflow valve 9, fuel tank 10 and the manual closed operation hydraulic system that constitutes of unloading one-way valve 17; The pressure oil of oil pump output is all supplied with actuator's acting during the system proper functioning; Do not have any unnecessary pressure oil and overflow back fuel tank 10; Said hydraulic power unit comprises motor 2 and frequency variator 3; Programmable controller 4 is according to the required flow of actuator, pressure parameter; The rotating speed of control frequency variator 3 adjustment motor 2 changes output flow; And the commentaries on classics that makes motor 2 outputs in frequency variator 3 control down also is that motor 2 is transferred to plunger-type fuel pump 1 constant torque apart from keeping constant, forms the positive correlation variation at the oil pressure of rated pressure scope inner plunger oil pump output with the variation of system works load; Along with operation mechanism's loads change, the power of hydraulic power unit output changes with operation mechanism's load positive correlation with fitting like a glove, avoids low load with strong power, has also eliminated the reactive power consumption because of idling products simultaneously.

Said safety overflow valve 9 no hydraulic pressure oil spill in the hydraulic work system process goes out, and only when the unexpected superpressure operation of system, just begins the pressure release oil spilling with protective system safety when reaching the safety relief parameter of setting.

Said three station self-acting valves 5 comprise three station valves 11, driving mechanism 12, dc micro-motor 13, left level sensor 14, middle level sensor 15 and right level sensor 16; Three station valves, 11 interfaces communicate with active chamber, backhaul chamber, plunger pump oil outlet, the fuel tank 10 of work jack respectively; Driving mechanism 12 places three station valves, 11 tops, and left level sensor 14, middle level sensor 15 and right level sensor 16 are installed in the position, left, center, right of handle below; Programmable controller 4 joins with dc micro-motor 13, and programmable controller 4 rotates through command control dc micro-motor 13, stops operating behind the arrival specified position, realizes 11 transpositions of the three station valves of control automatically, the deliberate action of the mechanism that finishes the work.Said three station valves 11 are designed to rotary three-position four-way valve, and circumference radially is provided with one handle, and said handle is used as positioning rod in automatic control and is used when controlling, when carrying out manual manipulation, be used as cursor and use.Said left level sensor 14, middle level sensor 15, right level sensor 16 all adopt inductance transducer, and when the handle of three station valves 11 goes to sensing station, sensor sends framing signal, and dc micro-motor 13 stops operating, and realizes accurately location.

The utility model also can be provided with system's Maximum operating pressure in programmable controller 4; Ultra this pressure electric oil pump of system will shut down automatically; Simultaneously, in system, establish safety overflow valve 9, its pressure unloading is higher than the Maximum operating pressure 0.5～1MPa that is provided with in the programmable controller 4; When programmable controller 4 breaks down, guarantee that system can superpressure operation damage system components and parts.

The beneficial effect of the utility model is: it can initiatively fit like a glove and satisfy the needs of working load, and system is provided with the maltilevel security measure, guarantees that system pressure can superpressure not move, and is a kind of hydraulic power supply of safety type.Because because of saving the work relief valve of conventional hydraulic, system becomes locking system during proper functioning in the said hydraulic system of the utility model, the pressure oil of oil pump output is all supplied with actuator's acting, does not have any unnecessary pressure oil and overflows back fuel tank.It is pressure and the flow that isobaric equivalent is provided according to the working load needs; The energy that energy is complete and working load consumes of power source output coincide; The idle work consumes energy is few, has significantly improved Energy Efficiency Ratio than the conventional hydraulic power source, has realized energy-efficient target.It is particularly suitable for the intelligent tensioning system of highway, railroad bridge pre-stress construction and does hydraulic power supply.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the plan structure schematic representation of Fig. 1.

Fig. 3 is the hydraulic work system schematic diagram of the utility model.

Fig. 4 is the three station self-acting valve side-looking structural representations of the utility model.

Fig. 5 is the plan structure schematic representation of Fig. 4.

Among the figure; The 1-plunger-type fuel pump; The 2-motor; The 3-frequency variator; The 4-programmable controller; 5-three station self-acting valves; 6-pressurize one-way valve; 7-electromagnetism ultrahigh pressure one-way valve; The 8-pressure transducer; The 9-safety overflow valve; The 10-fuel tank; 11-three station valves; The 12-driving mechanism; The 13-dc micro-motor; 14-left side level sensor; Level sensor among the 15-; The right level sensor of 16-; The manual unloading one-way valve of 17-.

Embodiment

Below in conjunction with embodiment the utility model is described further as follows:

Embodiment 1, by plunger-type fuel pump 1, motor 2, frequency variator 3, programmable controller 4, three station self-acting valves 5, pressurize one-way valve 6, electromagnetism ultrahigh pressure one-way valve 7, pressure transducer 8, safety overflow valve 9, fuel tank 10, manually parts such as unloading one-way valve 17 are formed.Programmable controller 4 is according to the required load of actuator (flow, pressure) control frequency variator 3 adjustment motors speed; Required load comprises that mainly flow, the pressure parameter in the oil circuit is definite; Under frequency variator 3 controls; The commentaries on classics of motor 2 output is apart from being constant, and the torque that motor is transferred to plunger-type fuel pump 1 also is constant, has determined that in rated pressure scope inner plunger oil pump characteristic the oil pressure of output is that variation with the system works load forms positive correlation and changes.After sending instruction when operation mechanism's setting pressure, traffic requirement and by programmable controller 4; Programmable controller 4 regulation and control frequency variators 3 make motor 2 and plunger-type fuel pump 1 supply pressure oil by setting flow to operation mechanism; Along with operation mechanism's loads change; The ground positive correlation that thereupon fits like a glove of the power of hydraulic power source system output changes, and realizes that hydraulic power supply exports corresponding flow, pressure with flow, the pressure of operation mechanism's load requirement with fitting like a glove.Hydraulic power supply does not have any unnecessary pressure oil and overflows from relief valve, has eliminated the reactive power consumption because of idling products.

For realizing above-mentioned functions; The utility model has designed the closed operation hydraulic system; Consult Fig. 3; It is provided with one 120 purpose filter before by the plunger pump of two-way output, one group of three station self-acting valve, pressurize one-way valve, electromagnetism ultrahigh pressure one-way valve, solenoid valve;, a safety overflow valve, three pressure transducers, manual unloading one-way valve and components and parts such as pump front filter and fuel tank are set form not because of unclean its work of the impurity effect of sneaking in the system with protection ultrahigh pressure one-way valve.Hydraulic system does not have any pressure oil and overflows back fuel tank from " safety overflow valve 9 " because of there not being " work relief valve " when system works, safety overflow valve 9 is decompression protection security of system when the unexpected superpressure of system is moved only.Consult Fig. 1 to 5.

The said three station self-acting valves 5 of the utility model are made up of three station valves 11, driving mechanism 12, dc micro-motor 13, left level sensor 14, middle level sensor 15, right level sensor 16.Three station valves, 11 interfaces communicate with active chamber, backhaul chamber, plunger pump oil outlet, the fuel tank 10 of work jack respectively, and driving mechanism 12 places three station valves, 11 tops, and position transducer is installed in the position, left, center, right of handle below.Programmable controller 4 rotates through command control dc micro-motor 13, stops operating behind the arrival specified position, controls 11 transpositions of three station valves automatically, the deliberate action of the mechanism that finishes the work.

The said three station self-acting valves of the utility model 5 working procedures are: " position, a left side ": working stroke position, " meta ": unloaded oil sump tank position, " right position ": work backhaul position.When programmable controller 4 needs according to " actuator " working stroke; Instruct three station valves 11 to go to position, left side (see figure 3) automatically; Pressure oil is delivered to actuator's active chamber (at this moment from plunger pump 1 oil outlet through three station valves 11; Manual unloading one-way valve 17 closed conditions), the stroke of starting working, actuator's backhaul chamber hydraulic oil passes back into fuel tank 10 through three station valves 11.The stroke of finishing the work; Programmable controller 4 sends the backhaul instruction, and three station valves 11 go to right position automatically, and pressure oil is delivered to " actuator " backhaul chamber from plunger pump 1 oil outlet through three station valves 11; " actuator " beginning backhaul; At this moment, normally closed " electromagnetism ultrahigh pressure one-way valve 7 " opened simultaneously, and " actuator " active chamber hydraulic oil passes back into fuel tank 10 through " electromagnetism ultrahigh pressure one-way valve 7 ".When three station valves 11 are got back to meta, " electromagnetism ultrahigh pressure one-way valve 7 " closes, and pressurize one-way valve 6 cuts off active chamber pressure oil backflow pressure release passages, keeps " actuator " active chamber hydraulic oil force value at that time.Be implemented in plunger pump 1 and shut down, " actuator " active chamber still keeps its force value.

The said three station valves 11 of the utility model are designed to rotary three-position four-way valve, and circumference radially is provided with one handle, make positioning rod in the time of automatically, and arm rotates in the time of manually.

The said left level sensor of the utility model 14, middle level sensor 15, right level sensor 16 all adopt inductance transducer; When the handle of three station valves 11 goes to sensing station; Sensor sends framing signal, and dc micro-motor 13 stops operating, and realizes accurately location.

The said intelligent hydraulic of the utility model system fault that meets accident at work when causing robot control system(RCS) to work, can be opened manual unloading one-way valve 17, and system pressure is got back to " 0 ", and the accident that prevents further enlarges.When system's proper functioning, manually unloading one-way valve 17 is closed by manual work in advance, is in closed condition.

The said hydraulic system safety precautions of the utility model comprises: system's Maximum operating pressure is set in programmable controller 4; Ultra this pressure electric oil pump of system will shut down automatically.Simultaneously, in system, establish mechanical overflow safety valve, its pressure unloading is higher than the Maximum operating pressure 0.5～1MPa that is provided with in the programmable controller 4; When programmable controller 4 breaks down, guarantee that system can superpressure operation damage system components and parts.Consult Fig. 1 to 5.

Because because of the work relief valve is not set, system becomes locking system during proper functioning in the said hydraulic system of the utility model, the pressure oil of oil pump output is all supplied with actuator's acting, does not have any unnecessary pressure oil and overflows back fuel tank.It is pressure and the flow that isobaric equivalent is provided according to the working load needs; The energy that energy is complete and working load consumes of power source output coincide; The idle work consumes energy is few, has significantly improved Energy Efficiency Ratio than the conventional hydraulic power source, has realized energy-efficient target.It is particularly suitable for the intelligent tensioning system of highway, railroad bridge pre-stress construction and does hydraulic power supply.

Embodiment 2; Can know that by Fig. 1 present embodiment is by plunger-type fuel pump 1, motor 2, frequency variator 3, programmable controller 4, three station self-acting valves 5, pressurize one-way valve 6, electromagnetism ultrahigh pressure one-way valve 7, pressure transducer 8, safety overflow valve 9, fuel tank 10, manually parts such as unloading one-way valve 17 are formed.Plunger-type fuel pump 1 adopts 10 millimeters plunger coupling spare superpressure pumps of six groups of straight warps, 12 liters/minute of flows; High output pressure 60MPa; Motor 2 adopts 3kw level Four common electric machine; Frequency variator 3 employing type frequency variators; Three station self-acting valves 5 are employed in reducing gear and the dc micro-motor that the band large speed ratio is set on the rotary three station valves of conventional valve; Position, left, center, right, three station valve handles below is provided with type respectively near the formula position transducer; The super high-pressure single that electromagnetism ultrahigh pressure one-way valve 7 adopts 24 volt-amperes of full voltages to; Pressure transducer 8 adopts the type sensor of high stability; Pressurize one-way valve 6, manual unloading one-way valve 17, fuel tank 10 and traditional structural similarity.Programmable controller 4 is according to the required load of actuator (flow, pressure) control frequency variator 3 adjustment motors speed; Under frequency variator 3 controls; The commentaries on classics distance of motor 2 outputs is constant; The torque that motor is transferred to plunger-type fuel pump 1 also is constant, has determined that in rated pressure scope inner plunger oil pump characteristic the oil pressure of output is that variation with the system works load forms positive correlation and changes.After sending instruction when operation mechanism's setting pressure, traffic requirement and by programmable controller 4, programmable controller 4 sends instruction regulation and control frequency variator 3, makes motor 2 drive plunger-type fuel pumps 1 and supplies pressure oil by setting flow to operation mechanism.Along with operation mechanism's loads change, the positive correlation that the hydraulic power source system delivery pressure fits like a glove thereupon changes, and the realization hydraulic power supply is exported corresponding flow, pressure with flow, the pressure of operation mechanism's load requirement with fitting like a glove.Hydraulic power supply does not have any unnecessary pressure oil and overflows from relief valve, at this moment, because of the reactive power consumption of idle running and low load with strong power generation, can loss-rate not be improved significantly.Consult Fig. 1 to 5, all the other are with embodiment 1.

Claims

1. one kind with the coincide full intelligent hydraulic power source of outputting power of loads change; It is characterized in that: it comprises hydraulic system, hydraulic power unit and programmable controller (4); The plunger-type fuel pump of hydraulic system (1) is connected with the motor (2) of hydraulic power unit, and programmable controller (4) joins with the control circuit of the frequency variator (3) of three station self-acting valves (5), electromagnetism ultrahigh pressure one-way valve (7), pressure transducer (8) and the hydraulic power unit of hydraulic system respectively; Said hydraulic system comprises the closed operation hydraulic system that plunger-type fuel pump (1), three station self-acting valves (5), pressurize one-way valve (6), electromagnetism ultrahigh pressure one-way valve (7), pressure transducer (8), safety overflow valve (9), fuel tank (10) and manual unloading one-way valve (17) constitute; The pressure oil of oil pump output is all supplied with actuator's acting during the system proper functioning; Do not have any unnecessary pressure oil and overflow back fuel tank (10); Said hydraulic power unit comprises motor (2) and frequency variator (3); Programmable controller (4) is according to the required flow of actuator, pressure parameter; The rotating speed of control frequency variator (3) adjustment motor (2) changes output flow; And the commentaries on classics that makes motor (2) output in frequency variator (3) control down also is that motor (2) is transferred to plunger-type fuel pump (1) constant torque apart from keeping constant, forms the positive correlation variation at the oil pressure of rated pressure scope inner plunger oil pump output with the variation of system works load; Along with operation mechanism's loads change, the power of hydraulic power unit output changes with operation mechanism's load positive correlation with fitting like a glove.

2. said with the coincide full intelligent hydraulic power source of outputting power of loads change according to claim 1; It is characterized in that: said safety overflow valve (9) no hydraulic pressure oil spill in the hydraulic work system process goes out; Only when the unexpected superpressure operation of system, just begin the pressure release oil spilling with protective system safety when reaching the safety relief parameter of setting.

3. said with the coincide full intelligent hydraulic power source of outputting power of loads change according to claim 1, it is characterized in that: said three station self-acting valves (5) comprise three station valves (11), driving mechanism (12), dc micro-motor (13), left level sensor (14), middle level sensor (15) and right level sensor (16); Three station valve (11) interfaces communicate with active chamber, backhaul chamber, plunger pump oil outlet, the fuel tank (10) of work jack respectively; Driving mechanism (12) places three station valves (11) top, and left level sensor (14), middle level sensor (15) and right level sensor (16) are installed in the position, left, center, right of handle below; Programmable controller (4) joins with dc micro-motor (13); Programmable controller (4) rotates through command control dc micro-motor (13); Stop operating after arriving specified position, realize control three station valves (11) transposition automatically, the deliberate action of the mechanism that finishes the work.

4. said with the coincide full intelligent hydraulic power source of outputting power of loads change according to claim 3; It is characterized in that: said three station valves (11) are designed to rotary three-position four-way valve; Circumference radially is provided with one handle; Said handle is used as positioning rod in automatic control and is used when controlling, when carrying out manual manipulation, be used as cursor and use.

5. said with the coincide full intelligent hydraulic power source of outputting power of loads change according to claim 3; It is characterized in that: said left level sensor (14), middle level sensor (15), right level sensor (16) all adopt inductance transducer; When the handle of three station valves (11) goes to sensing station; Sensor sends framing signal, and dc micro-motor (13) stops operating, and realizes accurately location.

6. said with the coincide full intelligent hydraulic power source of outputting power of loads change according to claim 1, it is characterized in that: in programmable controller (4), system's Maximum operating pressure is set; Ultra this pressure electric oil pump of system will shut down automatically; Simultaneously, in system, establish safety overflow valve (9), its pressure unloading is higher than the Maximum operating pressure 0.5～1MPa that is provided with in the programmable controller (4); When programmable controller (4) breaks down, guarantee that system can superpressure operation damage system components and parts.