CN106122133B - A kind of multistage rotating speed hydraulic control speed control loop of unit head and method - Google Patents

A kind of multistage rotating speed hydraulic control speed control loop of unit head and method Download PDF

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Publication number
CN106122133B
CN106122133B CN201610716170.9A CN201610716170A CN106122133B CN 106122133 B CN106122133 B CN 106122133B CN 201610716170 A CN201610716170 A CN 201610716170A CN 106122133 B CN106122133 B CN 106122133B
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control valve
directional control
way
valve
hydraulic control
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CN106122133A (en
Inventor
常江华
鲁飞飞
田宏亮
凡东
王贺剑
刘祺
祁玉宁
张阳
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Xian Research Institute Co Ltd of CCTEG
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Xian Research Institute Co Ltd of CCTEG
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The present invention relates to a kind of hydraulic control speed control loop and method, belong to engineering machinery field, and in particular to a kind of multistage rotating speed hydraulic control speed control loop of unit head and method.Including shuttle valve, banked direction control valves, 2/2-way reversal valve, hydraulic control double speed rotary motor composition.The present invention has the revolution of two or more power rotation motor drive power heads, 2/2-way reversal valve break-make realizes hydraulic control double speed rotary motor two-stage speed governing, and banked direction control valves can conveniently realize that high-speed two-stage rotational speed is changed with 2/2-way pilot operated directional control valve composition hydraulic control network.The achievable power rotation speed multi-stage rotating speed control of the present invention, speed adjustable range is big, system composition is simple, cost is low, and rate conversion is convenient and reliable.

Description

A kind of multistage rotating speed hydraulic control speed control loop of unit head and method
Technical field
The present invention relates to a kind of hydraulic control speed control loop and method, belong to engineering machinery field, and in particular to a kind of unit head Multistage rotating speed hydraulic control speed control loop and method.
Background technology
Drill power head requirement has larger speed adjustable range, to adapt to Different Strata and drilling process requirement.Due to Tradition machinery formula unit head speed adjustment system speed adjustable range is small, and transmission efficiency is low, can not realize drilling speed step-less adjustment etc. Shortcoming, hydraulic drive is big due to its power-weight ratio, system layout flexibly, the advantages of transmission efficiency.Current drill power head Revolution uses hydraulic control, because the speed control system with adjustable displacement of variable pump addition of variable motor composition is in unit head rotational speed regulation process In without throttling and spill losses, the application on drill power head rotary loop is more, realizes the efficient of unit head rotating speed Step-less adjustment.
With the raising of drill capacity, drill power head rotating speed and torque are consequently increased, and two are used its unit head more Or two or more huge discharge fluid motor-driven.To meet the row of hydraulic pump in rig speed demand, rig hydraulic control system Amount also constantly increase, is influenceed by the factor of drill configuration and cost, simple to be moved by improving the discharge capacity of hydraulic pump to improve rig Power head rotary motor rotating speed can not meet requirement.In the revolution control loop design of part drill power head, unit head is returned Turn using variable pump power-up or hydraulic proportional control motor solu-tions, although this scheme is solved before hydraulic pump discharge is not changed Raising unit head rotating speed is put, but this scheme system composition is complicated, cost is higher.In engineering machinery field, multichannel is also used Valve network, by the speed-control scheme for changing multiple motor connection in series-parallel relations.Although the program can realize that unit head is turned round The big regulation of velocity interval, but system composition is more complicated, due to the series connection of multiple hydraulic motors, upper unit head rotary motor outlet High temperature hydraulic oil is directly entered next unit head rotary motor without cooling, causes hydraulic oil temperature too high so that hydraulic oil is fast Fast aged deterioration, viscosity reduction.Cause hydraulic system leakage increase, the reduction of hydraulic system volumetric efficiency and seal fails.
The content of the invention
The unit head rotational speed regulation scope that the present invention mainly solves present in prior art is limited, and Design of Speed is multiple Miscellaneous, there is provided a kind of multistage rotating speed hydraulic control speed control loop of unit head and method for the higher technical problem of cost.It is dynamic there is provided one kind The multistage rotating speed hydraulic control speed control loop of power head and method.The loop and method can realize that power rotation speed multi-stage rotating speed is controlled, and adjust Fast scope is big, system composition is simple, cost is low, and rate conversion is convenient and reliable.
The above-mentioned technical problem of the present invention is mainly what is be addressed by following technical proposals:
In order to solve the above problems, according to an aspect of the invention, there is provided a kind of multistage rotating speed hydraulic control of unit head is adjusted Fast loop, including:
2/2-way pilot operated directional control valve, is at least divided into the logic of two neighboring 2/2-way pilot operated directional control valve in one group, group Connected between selection path;
Hydraulic control double speed rotary motor, is at least divided into two groups, high pressure hydraulic fluid port and the system oil inlet and oil return mouthful phase of one group of wherein at least Even;At least one set of high pressure hydraulic fluid port is connected between the logic selection path of two neighboring 2/2-way pilot operated directional control valve;
First multiple directional control valve, is connected with 2/2-way liquid controlled reversing valve group, for controlling the logic selection path Break-make is so as to control to be connected to the quantity of hydraulic control double speed rotary motor group in loop.
Optimize, a kind of multistage rotating speed hydraulic control speed control loop of above-mentioned unit head, in 2/2-way liquid controlled reversing valve group The logic selection path control bit of each 2/2-way pilot operated directional control valve is connected to the different output controls of the first multiple directional control valve Mouthful.
Optimization, a kind of multistage rotating speed hydraulic control speed control loop of above-mentioned unit head, the row of each hydraulic control double speed rotary motor Measure the different output controls mouthful that control mouth connects the second multiple directional control valve (11).
Optimization, a kind of multistage rotating speed hydraulic control speed control loop of above-mentioned unit head, the pressure oil port and shuttle of multiple directional control valve The outlet of valve is connected, and its oil return opening is connected with fuel tank;Two imports of the shuttle valve connect entering for unit head driving circuit respectively Oil return opening.
Optimization, a kind of multistage rotating speed hydraulic control speed control loop of above-mentioned unit head, first multiple directional control valve is three Four-way reversing valve;
The 2/2-way pilot operated directional control valve is the logic selection of a 2/2-way pilot operated directional control valve in two groups, every group Path control bit connects the first actuator port of three position four-way directional control valve, the logic selection path of another two logical pilot operated directional control valve Control bit connects the second actuator port of three position four-way directional control valve;
The hydraulic control double speed rotary motor is divided into two groups, wherein first group of high pressure hydraulic fluid port is connected with system oil inlet and oil return mouthful; The high pressure hydraulic fluid port of first hydraulic control double speed rotary motor is connected to two of first group of 2/2-way pilot operated directional control valve in another group Between logic selection path, the high pressure hydraulic fluid port of second hydraulic control double speed rotary motor is connected to second group of 2/2-way in another group Between two logic selection paths of pilot operated directional control valve.
In order to solve the above problems, there is provided a kind of multistage rotating speed hydraulic control of unit head according to another aspect of the present invention Speed regulating method, including:
2/2-way pilot operated directional control valve is divided into the logic of two neighboring 2/2-way pilot operated directional control valve at least one set, group Connected between selection path;
Hydraulic control double speed rotary motor is divided at least two groups, at least one set of high pressure hydraulic fluid port is connected to two neighboring two Between the logic selection path of two logical pilot operated directional control valves;
The break-make of the logic selection path is controlled to control to be connected in loop using first multiple directional control valve The quantity of hydraulic control double speed rotary motor group.
Optimize, a kind of multistage rotating speed hydraulic control speed regulating method of above-mentioned unit head, in 2/2-way liquid controlled reversing valve group The logic selection path control bit of each 2/2-way pilot operated directional control valve is connected to the different output controls of the first multiple directional control valve Mouthful.
Optimization, a kind of multistage rotating speed hydraulic control speed regulating method of above-mentioned unit head, each hydraulic control double speed rotary motor group The different output controls mouthful of displacement control mouthful the second multiple directional control valve of connection.
Optimization, a kind of multistage rotating speed hydraulic control speed regulating method of above-mentioned unit head, the pressure oil port and shuttle of multiple directional control valve The outlet of valve is connected, and its oil return opening is connected with fuel tank;Two imports of the shuttle valve connect motor driving loop oil inlet and oil return respectively Mouthful.
Optimize, a kind of multistage rotating speed hydraulic control speed regulating method of above-mentioned unit head, it is three to lead to reversal valve the multidigit more Four-way reversing valve;
The 2/2-way pilot operated directional control valve is the logic selection path of one two logical pilot operated directional control valve in two groups, every group Control bit connects the first actuator port of three position four-way directional control valve, the logic selection path control of another two logical pilot operated directional control valve Second actuator port of position connection three position four-way directional control valve;
The hydraulic control double speed rotary motor is divided into two groups, wherein first group of high pressure hydraulic fluid port is connected with system oil inlet and oil return mouthful; The high pressure hydraulic fluid port of first hydraulic control double speed rotary motor is connected to two of first group of 2/2-way pilot operated directional control valve in another group Between logic selection path, the high pressure hydraulic fluid port of second hydraulic control double speed rotary motor is connected to second group of 2/2-way in another group Between two logic selection paths of pilot operated directional control valve.
Therefore, the invention has the advantages that:Increase three position four-way directional control valve on the basis of existing load sensitive system Two stage control system is constituted with 2/2-way pilot operated directional control valve, network is selected more by leading to pilot operated directional control valve composition function multidigit, Switching kinetics head rotary motor is in the same annexation of system.When unit head low speed is turned round, unit head rotary motor is in parallel.When When unit head needs revolution at a high speed, only partial power head rotary motor works, and remaining unit head rotary motor is in floating type State, so by the quantity of parallel power head rotary motor in conversing circuits, is realized under same traffic, the two of rotary motor rotating speed Level control.Realize that motor displacement two-stage is adjusted by changing hydraulic control double speed rotary motor discharge capacity, so that realize that rotating speed two-stage is adjusted, By the various combination of both the above mode, the multistage regulation of drill power head rotational speed can be achieved, speed is considerably increased Adjustable range.This invents a wide range of regulation problem for not only solving unit head rotational speed, and system composition is simple, speed Conversion is convenient and reliable and cost is relatively low.
Brief description of the drawings
Fig. 1 is that rotary motor series-parallel conversion realizes rotational speed regulation schematic diagram;
Systematic schematic diagram when Fig. 2 is unit head stop in embodiments of the invention;
Systematic schematic diagram when Fig. 3 is first order rotating speed in embodiments of the invention;
Systematic schematic diagram when Fig. 4 is second level rotating speed in embodiments of the invention;
Systematic schematic diagram when Fig. 5 is third level rotating speed in embodiments of the invention;
Systematic schematic diagram when Fig. 6 is fourth stage rotating speed in embodiments of the invention.
Embodiment
Below by embodiment, and with reference to accompanying drawing, technical scheme is described in further detail.
In figure, shuttle valve 1, three position four-way directional control valve 2, the first 2/2-way pilot operated directional control valve 3, the second 2/2-way hydraulic control are changed To valve 4, the first hydraulic control double speed rotary motor 5, the second hydraulic control double speed rotary motor 6, the 3rd 2/2-way pilot operated directional control valve 7, Four 2/2-way pilot operated directional control valves 8, the 3rd hydraulic control double speed rotary motor 9, the 4th hydraulic control double speed rotary motor 10,2/2-way are changed To valve 11.
Embodiment:
It is increasing to drill power head revolution rotational speed regulation area requirement with the raising of drill capacity, existing load Sensory system addition of variable pump realizes that unit head rotational speed regulation can not meet requirement, although have in engineering machinery field using many The mode of motor series-parallel conversion realizes rotational speed regulation, but the shortcomings of this scheme system composition complexity, governing system high oil temperature Rig governing system can not be met.
It is basic herein in the specific implementation of the present invention, it is considered to the characteristics of can realizing stepless time adjustment with reference to load sensitive system Upper increase can realize drill power head double speed using multiple unit head drive motors thinking that connected mode is changed in the loop Control.
The present embodiment be do not change unit head revolution hydraulic control system constitute substantially on the premise of realize four step velocitys Control control, is used as system in A1, B1 mouthfuls of selection high pressure fuel sources of oil supply loop by shuttle valve 1 and controls oil sources, the one of the present embodiment Planting the multistage rotating speed hydraulic control speed control loop of unit head includes:Shuttle valve 1, three position four-way directional control valve 2, the first 2/2-way pilot operated directional control valve 3rd, the second 2/2-way pilot operated directional control valve 4, the first hydraulic control double speed rotary motor 5, the second hydraulic control double speed rotary motor 6, the 3rd liang Position two logical pilot operated directional control valve 7, the 4th 2/2-way pilot operated directional control valve 8, the 3rd hydraulic control double speed rotary motor 9, the 4th hydraulic control double speed Rotary motor 10,2/2-way reversal valve 11.
The controllable four two logical pilot operated directional control valve switching logics of three position four-way directional control valve 2,2/2-way pilot operated directional control valve is opened Close logical transition and can control hydraulic control double speed rotary motor annexation, realize and turn between unit head revolution at a high speed and low speed revolution Change.
If the three position four-way directional control valve 2 works in upper, unit head low speed revolution, three position four-way directional control valve 2 works in Bottom, unit head revolution at a high speed, three position four-way directional control valve 2 works in middle position, unit head rotary braking.
Described shuttle valve 1C mouthfuls with 2/2-way reversal valve 11A mouthfuls be connected, 11B mouthfuls of 2/2-way reversal valve is returned with hydraulic control double speed Turn motor hydraulic control mouthful X to be connected.
If hydraulic control double speed rotary motor hydraulic control mouthful X is high pressure, the work of hydraulic control double speed rotary motor small displacement, on the contrary hydraulic control Double speed rotary motor huge discharge works.
Described shuttle valve 1A, B mouthfuls are connected with hydraulic system oil inlet and oil return mouthful A1, B1 respectively, and 1C mouthfuls of shuttle valve commutates with 3-position 4-way 2P mouthfuls of connections of valve.The A mouths of the three position four-way directional control valve 2 and the first 2/2-way pilot operated directional control valve 3, the 3rd 2/2-way hydraulic control The A mouths connection of reversal valve 7, B mouths and the second 2/2-way pilot operated directional control valve 4, the 4th 2/2-way liquid of three position four-way directional control valve 2 The A mouths connection of reversal valve 8 is controlled, T mouthfuls of three position four-way directional control valve is connected with fuel tank.
If A1 mouthfuls or B1 mouthfuls are high-pressure mouth, selected by shuttle valve 1,2P mouthful pressure of three position four-way directional control valve and A1 or B1 high-pressure mouth pressure is identical.If the A mouth high pressures of three position four-way directional control valve 2, the first 2/2-way pilot operated directional control valve 3, the 3rd liang The C mouths of the logical pilot operated directional control valve 7 in position two lead to B mouthfuls, the second 2/2-way pilot operated directional control valve 4, the 4th 2/2-way pilot operated directional control valve 8 C mouths and B mouthfuls it is obstructed.If the B mouth high pressures of three position four-way directional control valve 2, the second 2/2-way pilot operated directional control valve 4, the 4th two C mouths of two logical pilot operated directional control valves 8 and B mouthfuls of logical, the first 2/2-way pilot operated directional control valve 3, the 3rd 2/2-way pilot operated directional control valves 7 C mouthfuls obstructed with B mouthfuls.
Hydraulic control the first hydraulic control double speed rotary motor 5, the A mouths of the 3rd hydraulic control double speed rotary motor 9 and system oil inlet and oil return Mouth A1 and the first 2/2-way pilot operated directional control valve 3, the C mouths connection of the 3rd 2/2-way pilot operated directional control valve 7, the second hydraulic control double speed are returned Turn motor 6, the A mouths of the 4th hydraulic control double speed rotary motor 10 and the first 2/2-way pilot operated directional control valve 3, the 3rd 2/2-way hydraulic control The C mouths connection of the B mouths and the second 2/2-way pilot operated directional control valve 4, the 4th 2/2-way pilot operated directional control valve 8 of reversal valve 7.
If the B mouths of the first 2/2-way pilot operated directional control valve 3, the 3rd 2/2-way pilot operated directional control valve 7 lead to C mouthfuls, second liang The logical pilot operated directional control valve 4 in position two, the B mouths of the 4th 2/2-way pilot operated directional control valve 8 and C mouthfuls are obstructed, then the first hydraulic control double speed revolution horse Up to the 5, second hydraulic control double speed rotary motor 6, the 3rd hydraulic control double speed rotary motor 9, the 4th hydraulic control double speed rotary motor 10 parallel connection, Unit head works in the slow-speed of revolution.If the B mouths and C of the first 2/2-way pilot operated directional control valve 3, the 3rd 2/2-way pilot operated directional control valve 7 Mouth is obstructed, and the second 2/2-way pilot operated directional control valve 4, the B mouths of the 4th 2/2-way pilot operated directional control valve 8 lead to C mouthfuls, then hydraulic control first The parallel connection of hydraulic control double speed rotary motor 5, the 3rd hydraulic control double speed rotary motor 9, the second hydraulic control double speed rotary motor 6, the 4th hydraulic control The floating of double speed rotary motor 10, unit head works in high rotating speed.
The first hydraulic control double speed rotary motor 5, the second hydraulic control double speed rotary motor 6, the 3rd hydraulic control double speed rotary motor 9th, the B mouths of the 4th hydraulic control double speed rotary motor 10 are connected with system oil inlet and oil return mouthful B1.Second 2/2-way pilot operated directional control valve 4, The B mouths of four 2/2-way pilot operated directional control valves 8 are connected with system oil inlet and oil return mouthful B1.
The operation principle of the present embodiment is illustrated with reference to Fig. 2-6.
Systematic schematic diagram when Fig. 2 is unit head stop in embodiment.When three position four-way directional control valve in figure works in middle position, Figure it is seen that now three position four-way directional control valve A, B mouthfuls of direct oil return boxes, now the first 2/2-way pilot operated directional control valve 3, Second 2/2-way pilot operated directional control valve 4, the 3rd 2/2-way pilot operated directional control valve 7, the control of the 4th 2/2-way pilot operated directional control valve 8 The all low pressure of oil sources, now the first 2/2-way pilot operated directional control valve 3, the second 2/2-way pilot operated directional control valve 4, the 3rd two two Logical pilot operated directional control valve 7, C to B mouthfuls of oil of the 4th 2/2-way pilot operated directional control valve 8 are path, now the second hydraulic control double speed revolution horse Up to the turn passage that can not be formed of the 6, the 4th 2/2-way pilot operated directional control valve 8, unit head stop.
If unit head needs the revolution of one-level low speed, its principle as shown in figure 3, three position four-way directional control valve is shifted into bottom, when When hydraulic oil source is unit head rotary motor fuel feeding, system is used as in A1, B1 mouthfuls of selection high pressure fuel sources of oil supply loop by shuttle valve 1 Control the second 2/2-way pilot operated directional control valve 4 in oil sources, figure, A mouthfuls of the hydraulic control end of the 4th 2/2-way pilot operated directional control valve 8 is low Pressure, valve element works in right position.A mouthfuls of the hydraulic control end of first 2/2-way pilot operated directional control valve 3, the 3rd 2/2-way pilot operated directional control valve 7 For high pressure, valve element works in left position.Due to now the first hydraulic control double speed rotary motor 5, the second hydraulic control double speed rotary motor 6, Three hydraulic control double speed rotary motors 9, the 4th hydraulic control double speed rotary motor 10 are parallel to A1 and B1 mouthfuls of high pressure fuel source, therefore in hydraulic oil In the case that source flux is constant, the total displacement of unit head rotary motor is the first hydraulic control double speed rotary motor 5, the second hydraulic control double speed Rotary motor 6, the 3rd hydraulic control double speed rotary motor 9, the discharge capacity sum of the 4th hydraulic control double speed rotary motor 10, now two two Logical reversal valve 11 works in bottom, and X mouthfuls of hydraulic control double speed rotary motor is low pressure, and hydraulic control double speed rotary motor works in huge discharge.
If unit head needs two grades of low speed revolutions, its principle as shown in figure 4, three position four-way directional control valve is shifted into bottom, In the case that high pressure fuel source flow is constant, the total displacement of unit head rotary motor is the first hydraulic control double speed rotary motor 5, the second liquid Control double speed rotary motor 6, the 3rd hydraulic control double speed rotary motor 9, the discharge capacity sum of the 4th hydraulic control double speed rotary motor 10, two Two logical reversal valves 11 work in upper, and X mouthful of hydraulic control double speed rotary motor is high pressure, and hydraulic control double speed rotary motor works in float Amount.
If unit head needs three-level revolution at a high speed, its principle as shown in figure 5, three position four-way directional control valve is shifted to it is upper, when When hydraulic oil source is unit head rotary motor fuel feeding, system is used as in A1, B1 mouthfuls of selection high pressure fuel sources of oil supply loop by shuttle valve 1 Control the first 2/2-way pilot operated directional control valve 3 in oil sources, figure, A mouthfuls of the hydraulic control end of the 3rd 2/2-way pilot operated directional control valve 7 is low Pressure, valve element works in right position.A mouthfuls of the hydraulic control end of second 2/2-way pilot operated directional control valve 4, the 4th 2/2-way pilot operated directional control valve 8 For high pressure, valve element works in left position.Due to now hydraulic control the first hydraulic control double speed rotary motor 5, the 3rd hydraulic control double speed rotary motor 9 High pressure fuel source A1 and B1 mouthfuls are parallel to, the second hydraulic control double speed rotary motor 6, being in for the 4th hydraulic control double speed rotary motor 10 are floated State, therefore in the case where high pressure fuel source flow is constant, the total displacement of hydraulic control double speed rotary motor is double for the hydraulic control of hydraulic control first The discharge capacity sum of fast rotary motor 5, the 3rd hydraulic control double speed rotary motor 9,2/2-way reversal valve 11 works in bottom, hydraulic control X mouthfuls of double speed rotary motor is low pressure, and motor operations are in huge discharge.Now unit head rotating speed is that four hydraulic control double speed rotary motors are big Twice when in parallel under discharge capacity.
If unit head needs level Four revolution at a high speed, its principle as shown in fig. 6, three position four-way directional control valve is shifted to it is upper, this When hydraulic control the first hydraulic control double speed rotary motor 5, the 3rd hydraulic control double speed rotary motor 9 be parallel to A1 and B1 mouthfuls of high pressure fuel source, second Hydraulic control double speed rotary motor 6, the 4th hydraulic control double speed rotary motor 10 be in quick condition, hydraulic control double speed rotary motor it is total Discharge capacity is hydraulic control the first hydraulic control double speed rotary motor 5, the discharge capacity sum of the 3rd hydraulic control double speed rotary motor 9, and 2/2-way is changed Bottom is worked in valve 11, X mouthfuls of hydraulic control double speed rotary motor is high pressure, and motor operations are in small displacement discharge capacity.Now unit head turns Speed is twice under four hydraulic control double speed rotary motor small displacements during parallel connection.
In actual applications, unit head level Four hydraulic control system for speed governing passes through shuttle valve 1, three position four-way directional control valve and 2/2-way Pilot operated directional control valve constitutes loop switching network, can conveniently realize the annexation of hydraulic control double speed rotary motor in the loop, so that Realize that two step velocitys are adjusted, speed adjustable range is expanded by two-stage using hydraulic control double-speed motor again in addition, finally realize that unit head is turned round The level Four regulation of speed.System composition is simple, can be in the case where not changing the original speed adjusting circuit of rig, by unit head Rotational speed regulation scope expands four times greater.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should It is considered as the category that the present invention is protected.
Specific embodiment described herein is only to spirit explanation for example of the invention.Technology neck belonging to of the invention The technical staff in domain can be made various modifications or supplement to described specific embodiment or be replaced using similar mode Generation, but without departing from the spiritual of the present invention or surmount scope defined in appended claims.

Claims (8)

1. a kind of multistage rotating speed hydraulic control speed control loop of unit head, it is characterised in that including:
2/2-way pilot operated directional control valve, is at least divided into the logic selection of two neighboring 2/2-way pilot operated directional control valve in one group, group Connected between path;
Hydraulic control double speed rotary motor, is at least divided into two groups, the high pressure hydraulic fluid port of one group of wherein at least is connected with system oil inlet and oil return mouthful;Extremely Few one group high pressure hydraulic fluid port is connected between the logic selection path of two neighboring 2/2-way pilot operated directional control valve;
First multiple directional control valve, is connected with 2/2-way liquid controlled reversing valve group, the break-make for controlling the logic selection path So as to control to be connected to the quantity of hydraulic control double speed rotary motor group in loop;
Displacement control mouthful the second multiple directional control valve of connection of each hydraulic control double speed rotary motor(11)Identical output control mouthful.
2. a kind of multistage rotating speed hydraulic control speed control loop of unit head according to claim 1, it is characterised in that 2/2-way liquid The logic selection path control bit of each 2/2-way pilot operated directional control valve in control commutation valve group is connected to the first multiple directional control valve Different output controls mouthful.
3. the multistage rotating speed hydraulic control speed control loop of a kind of unit head according to claim 1, it is characterised in that the first multichannel is changed The outlet of pressure oil port and shuttle valve to valve is connected, and its oil return opening is connected with fuel tank;Two imports of the shuttle valve are connected respectively The oil inlet and oil return mouthful of unit head driving circuit.
4. the multistage rotating speed hydraulic control speed control loop of a kind of unit head according to claim 1, it is characterised in that more than described first Way reversing valve is three position four-way directional control valve;
The 2/2-way pilot operated directional control valve is the logic selection path of a 2/2-way pilot operated directional control valve in two groups, every group Control bit connects the first actuator port of three position four-way directional control valve, the logic selection path control of another two logical pilot operated directional control valve Second actuator port of position connection three position four-way directional control valve;
The hydraulic control double speed rotary motor is divided into two groups, wherein first group of high pressure hydraulic fluid port is connected with system oil inlet and oil return mouthful;It is another The high pressure hydraulic fluid port of first hydraulic control double speed rotary motor is connected to two logics of first group of 2/2-way pilot operated directional control valve in group Between selection path, the high pressure hydraulic fluid port of second hydraulic control double speed rotary motor is connected to second group of 2/2-way hydraulic control in another group Between two logic selection paths of reversal valve.
5. a kind of multistage rotating speed hydraulic control speed regulating method of unit head, it is characterised in that including:
2/2-way pilot operated directional control valve is divided into the logic selection of two neighboring 2/2-way pilot operated directional control valve at least one set, group Connected between path;
Hydraulic control double speed rotary motor is divided at least two groups, at least one set of high pressure hydraulic fluid port is connected to two neighboring 2/2-way Between the logic selection path of pilot operated directional control valve;
The break-make of the logic selection path is controlled to control to be connected to hydraulic control in loop using first multiple directional control valve The quantity of double speed rotary motor group;
The identical output control mouthful of displacement control mouthful the second multiple directional control valve of connection of each hydraulic control double speed rotary motor group.
6. a kind of multistage rotating speed hydraulic control speed regulating method of unit head according to claim 5, it is characterised in that 2/2-way liquid The logic selection path control bit of each 2/2-way pilot operated directional control valve in control commutation valve group is connected to the first multiple directional control valve Different output controls mouthful.
7. the multistage rotating speed hydraulic control speed regulating method of a kind of unit head according to claim 5, it is characterised in that its feature exists In the pressure oil port of multiple directional control valve is connected with the outlet of shuttle valve, and its oil return opening is connected with fuel tank;Two imports of the shuttle valve Motor driving loop oil inlet and oil return mouthful is connected respectively.
8. the multistage rotating speed hydraulic control speed regulating method of a kind of unit head according to claim 5, it is characterised in that more than described first Way reversing valve is three position four-way directional control valve;
The 2/2-way pilot operated directional control valve is the logic selection path control of one two logical pilot operated directional control valve in two groups, every group First actuator port of position connection three position four-way directional control valve, the logic selection path control bit of another two logical pilot operated directional control valve connects Connect the second actuator port of three position four-way directional control valve;
The hydraulic control double speed rotary motor is divided into two groups, wherein first group of high pressure hydraulic fluid port is connected with system oil inlet and oil return mouthful;It is another The high pressure hydraulic fluid port of first hydraulic control double speed rotary motor is connected to two logics of first group of 2/2-way pilot operated directional control valve in group Between selection path, the high pressure hydraulic fluid port of second hydraulic control double speed rotary motor is connected to second group of 2/2-way hydraulic control in another group Between two logic selection paths of reversal valve.
CN201610716170.9A 2016-08-24 2016-08-24 A kind of multistage rotating speed hydraulic control speed control loop of unit head and method Active CN106122133B (en)

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CN107725516B (en) * 2017-08-30 2021-04-20 美通重工有限公司 Walking driving hydraulic system of aerial work platform
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