CN107605825B - A kind of large hydraulic press crossbeam electrical servo levelling device - Google Patents
A kind of large hydraulic press crossbeam electrical servo levelling device Download PDFInfo
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- CN107605825B CN107605825B CN201710818434.6A CN201710818434A CN107605825B CN 107605825 B CN107605825 B CN 107605825B CN 201710818434 A CN201710818434 A CN 201710818434A CN 107605825 B CN107605825 B CN 107605825B
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Abstract
The present invention relates to a kind of large hydraulic mechanisms, and in particular to a kind of large hydraulic press crossbeam electrical servo levelling device.A kind of large hydraulic press crossbeam electrical servo levelling device, including crossbeam and 4 hydro -leveling devices being connect with the crossbeam lower end surface, 4 hydro -leveling devices are separately positioned at four angles of crossbeam, the hydro -leveling device includes the plunger case for coarse adjustment and the electro-hydraulic servo cylinder for fine tuning, and the bottom end of the electro-hydraulic servo cylinder is fixedly connected with the top of plunger case.The application proposes a kind of large hydraulic press crossbeam electrical servo levelling device, and the gentle fine tuning of coarse adjustment that can complete hydraulic press crossbeam is flat, improves the leveling precision of hydraulic press crossbeam, widens the application field of hydraulic leveling technology.
Description
Technical field
The present invention relates to a kind of large hydraulic mechanisms, and in particular to a kind of large hydraulic press crossbeam electrical servo leveling dress
It sets.
Background technique
Large-scale entirety isothermal die forging process part needs large hydraulic to machine, and large hydraulic press requires multi-cylinder to coordinate to contribute simultaneously,
The mechanical structure that multi-cylinder synchronous is accurately run.But it unevenly and is asymmetrical in shape, the manufacture of hydraulic cylinder, peace due to workpiece material
The factors such as dress precision cause hydraulic press crossbeam to tilt, to influence the quality of workpiece and reduce the service life of hydraulic press.Therefore have very much
Necessity synchronizes control to the horizontal gird movement of hydraulic press.But the crossbeam of current hydraulic press is mostly multi-cylinder block form driving liquid
Press, crossbeam move under the Driven by Hydraulic Cylinder on different location along column, and moving synchronously for crossbeam passes through when hydraulic press pushes
Piston cylinder and flow divider or mechanical synchronization control, and crossbeam will appear partially during the adjustment, and structure is complicated for this mode,
The piston cylinder accuracy of manufacture requires high, not set secondary fine tuning flat, and it is not high that crossbeam level controls precision.
Disclosing a kind of synchronous level of high dynamic compensation volume application No. is China's application of CN201710073327.5 is
System and its application, control method specifically disclose a kind of leveling system, including leveling subsystem subsystem synchronous with volume, adopt
With the mode of four-corner leveling, leveling subsystem has four groups, is arranged at the dead angle of press pedestal, and leveling subsystem includes piston
Formula levels cylinder, small latus rectum proportional servo valve, displacement sensor, constant pressure oil source, low pressure oil sources；The synchronous subsystem of volume includes waiting directly
Diameter volume synchronizes plunger case, common motion plate, return component.But the machine of specific device in leveling system is not provided in this application
Tool connection relationship, and the movement between piston type leveling cylinder and plunger case is to be mutually related, the range adjusted in this way is smaller, no
It can realize that the gentle fine tuning of coarse adjustment is flat simultaneously, reduce leveling precision.
Summary of the invention
Though in order to solve leveling system in the prior art using four-corner leveling, cannot the gentle fine tuning of coarse adjustment simultaneously it is flat
Problem, the application propose a kind of large hydraulic press crossbeam electrical servo levelling device, and the coarse adjustment that can complete hydraulic press crossbeam is flat
It is flat with fine tuning, the leveling precision of hydraulic press crossbeam is improved, the application field of hydraulic leveling technology is widened.Technical solution of the present invention
It is as follows:
A kind of large hydraulic press crossbeam electrical servo levelling device, including crossbeam and connect with the crossbeam lower end surface 4
A hydro -leveling device, 4 hydro -leveling devices are separately positioned at four angles of crossbeam, the hydro -leveling device packet
Include the plunger case for coarse adjustment and the electro-hydraulic servo cylinder for fine tuning, the bottom end of the electro-hydraulic servo cylinder and plunger case
Top be fixedly connected.It is convenient that four angles of crossbeam are adjusted respectively by four hydro -leveling devices by above-mentioned setting
Section, and when the altitude range of required adjustment is larger, it is adjusted using plunger case；When the altitude range of required adjustment is smaller
When, it is adjusted using electro-hydraulic servo cylinder, two adjustment processes are not interfere with each other, convenient accurately to be adjusted to beam height
It is whole, reach required height.
Further, the electro-hydraulic servo cylinder includes servoBcylinder cylinder body, is arranged in the intracorporal servoBcylinder of servoBcylinder cylinder
The PLC control system of piston, servo spool device, the servo motor for controlling servo spool device and the control servo motor,
Be provided with first pressure oil-in and oil outlet on the servoBcylinder cylinder body, the servo the cylinder piston include in servoBcylinder cylinder body
There are the upper piston in gap and the lower piston being in contact with servoBcylinder cylinder body medial surface, the tops of the upper piston for side
It is connect with the lower end surface of crossbeam, the inner cavity of servoBcylinder cylinder body is divided into superposed A chamber and is located at lower part by the lower piston
B chamber, the duct moved for pressure oil stream is provided in the servo the cylinder piston, is provided in the servo the cylinder piston for accommodating
The lower end of first cavity of servo spool device and bottom opening, the servo spool device is connect with servo motor, pressure oil
Enter A chamber by the first pressure oil-in, pressure oil enters B chamber by the duct, pressure oil by duct and
Oil outlet flows back to fuel tank.
The rationally structure of setting electro-hydraulic servo cylinder, can be by the control to stepper motor, and then control valve core fills
It sets, differential connection is formed, so that hydraulic cylinder piston the moving up and down in hydraulic cylinder body in hydraulic cylinder.
Further, the servo spool device includes servo valve body, servo spool and servo valve valve rod, the servo valve
Body and servo the cylinder piston are interference fitted, and servo spool is located in servo valve body, and servo valve valve rod upper end and servo spool connect
It connects, servo valve valve rod lower end passes through the output axis connection of shaft coupling, lead screw and servo motor.Servo spool device is rationally set
Structure and connection relationship with servo motor are worked by Serve Motor Control servo spool device, and then control pressure oil
Flow direction, adjust servo the cylinder piston height.
Further, be provided in the servo the cylinder piston the first duct for being connected to A chamber and servo spool device and
Second duct is provided with first valve port in connection the second duct and servo spool on the servo valve body；The servo the cylinder piston
On be additionally provided with the third duct and the 4th duct of connection B chamber and servo spool device, be provided with connection on the servo valve body
Second valve port in the 4th duct and valve core device；Formation is connected to oil outlet between the servo the cylinder piston and servoBcylinder cylinder body
Second cavity is provided with the 5th duct of connection the first cavity and the second cavity in the servo the cylinder piston.Rationally setting piston
On cellular structure, facilitate the flowing of pressure oil, stroke differential connection pushes servoBcylinder piston motion.
Further, the servo spool upper and lower ends are provided with chamfering, and first valve port is located under servo spool
The top of end chamfer and position close to lower end chamfer, second valve port are located on servo spool the lower section of end chamfer and close
The position of upper end chamfer, when the servo motor does not drive servo spool to move, the first valve port and the second valve port are in closing
State；When the servo motor drives servo spool to move upwards, at the corresponding lower end chamfer of the first valve port, the first valve port is opened,
Second valve port is in close state；When the servo motor drives servo spool to move downward, the second valve port falls corresponding to upper end
At angle, the second valve port is opened, and the first valve port is in close state.
Further, under the minimum point of first valve port and servo spool the highest point of end chamfer in same horizontal line
On, the minimum point of end chamfer is in the same horizontal line on the highest point of second valve port and servo spool.
The rationally relative position of the first valve port of setting, the second valve port and servo spool, it is convenient by adjusting servo spool, come
Control the opening and closing of the first valve port and the second valve port.When servo motor does not drive servo spool to move, the first valve port and the second valve port
It does not correspond at upper-lower section chamfering, the first valve port and the second valve port are in closed state.When servo motor drives servo spool
When moving upwards, deviation is generated between valve port and servo spool, the first valve port gradually corresponds to the lower end chamfer position of servo spool,
First valve port is opened, and the second valve port is in close state, and pressure oil passes through the first duct, the second duct and the first valve port from A chamber
B chamber is entered, B cavity area is greater than A cavity area, forms differential connection, pushes servoBcylinder piston upwards, attempts to eliminate inclined
Difference；When servo motor persistently drives servo spool to be adjusted up height, servo spool constantly opens the first valve port, and servo
The cylinder piston, which moves upwards, to be constantly trying to close the first valve port, and the second valve port remains off in whole process, so repeats
This process, servo the cylinder piston automatically track servo spool displacement, until servo motor stops that servo spool is driven to move upwards,
ServoBcylinder piston motion realizes the purpose of leveling to actually required position.Conversely, when servo motor drives servo spool downward
When movement, deviation is generated between valve port and servo spool, the second valve port gradually corresponds to the upper end chamfer position of servo spool, and second
Valve port is opened, and the first valve port is in close state, and pressure oil passes through third duct, the 4th duct, the second valve port, first from B chamber
Cavity top, the 5th duct, the second cavity and oil outlet return to fuel tank, and piston moves downward for servoBcylinder, attempt to eliminate deviation；When
When servo motor persistently drives servo spool to adjust height downwards, servo spool constantly opens the second valve port, and servoBcylinder is living
Plug, which moves downward, to be continuously attempted to close the second valve port, and the first valve port remains off in whole process, so repeats this mistake
Journey, servo the cylinder piston automatically track servo spool displacement, until servo motor stops that servo spool is driven to move downward, servoBcylinder
Piston motion realizes the purpose of leveling to actually required position.Servo spool work is driven by control servo motor, in turn
The up and down motion of servo the cylinder piston is controlled, and then adjusts horizontal depth of beam, this control method facilitates operation, and controls precision
It is high.
Further, the servoBcylinder cylinder body includes servo cylinder barrel, the servoBcylinder cylinder that servo cylinder barrel upper end is arranged in
The servoBcylinder flange of servo cylinder barrel lower end is covered and is arranged in, servoBcylinder cylinder cap and crossbeam are stretched out in the top of the servo the cylinder piston
Lower end surface connection, the lower end of the servo valve valve rod passes through servoBcylinder flange, and the lead screw includes ball screw and nut, institute
It states servo motor and ball-screw is connected by shaft coupling, the nut on the ball-screw is connected by screw under servo valve valve rod
It holds, is provided with servo motor sleeve on the servo motor.The rationally structure of setting electro-hydraulic servo cylinder, so that servo motor
Servo spool movement is steadily driven, and then adjusts horizontal depth of beam.
Further, the PLC control system includes grating displacement sensor and PLC controller, and the pattern displacement passes
Sensor detects the cornerwise displacement of crossbeam and output pulse signal to PLC controller, the PLC controller return pulse signal,
Offset deviation is calculated by comparing and exports control signal to servo motor.Setting is located on the same diagonal line of crossbeam
Two hydro -leveling devices are one group, and when there is deviation, grating displacement sensor detects the cornerwise displacement of crossbeam, export arteries and veins
Signal is rushed to PLC controller, same diagonal line is adjusted on sustained height by PLC controller, until two diagonal lines are adjusted
It is whole on sustained height.
Further, the plunger case includes plunger cylinder, the plunger being arranged in plunger cylinder and plunger case liquid
The upper end of pressure system, the plunger is connect with electro-hydraulic servo cylinder by servo motor sleeve flange, is equipped in the plunger
For accommodating the third cavity of servo motor, second pressure oil-in is set in the plunger cylinder.
Further, the plunger case hydraulic system includes check valve and throttle valve, and the throttle valve and check valve are in parallel
It is connected to after setting with pressure oil-in two.
The rationally structure of setting plunger case carries out coarse adjustment by plunger case HYDRAULIC CONTROL SYSTEM plunger case, reaches required
Adjustment effect.
The attainable technical effect of institute of the invention are as follows:
1. levelling device of the invention can carry out coarse adjustment by plunger case, is finely adjusted by electro-hydraulic servo cylinder,
It realizes coarse adjustment and fine tuning simultaneously, improves the leveling precision of hydraulic cylinder crossbeam；
2. the rationally structure of setting electro-hydraulic servo cylinder, forms similar two position three-way valve with valve port by servo spool
Structure controls the flowing of pressure oil, forms differential connection, adjusts servo the cylinder piston and horizontal depth of beam, structure is simple, is not necessarily to
In addition control device is set, the direction of rotation by controlling servo is the lifting of controllable servoBcylinder piston, it is easy to operate, and control
Precision height processed；
3. by the way that servo motor is arranged in the cavity in plunger cylinder plug, the upper end of plunger, stepper motor sleeve and
Hydraulic cylinder flange three is fixedly connected, effectively saving space, so that the connection between plunger case and electro-hydraulic servo cylinder is tighter
Gu；
4. carrying out real-time monitoring to the diagonal displacement of the lines of crossbeam, and control the tune of stepper motor by setting PLC control system
Whole offset deviation further increases leveling precision.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electrical servo levelling device of the invention；
Fig. 2 is the enlarged drawing in the portion C in Fig. 1；
In figure, 1- crossbeam；2- electro-hydraulic servo cylinder；21- servoBcylinder cylinder body；211- servo cylinder barrel；2111- first is pressed
Power oil-in；2112- oil outlet；212- servoBcylinder cylinder cap；213- servoBcylinder flange；22- servo the cylinder piston；The first chamber of 221-
Body；The first duct 222-；The second duct 223-；224- third duct；The 4th duct 225-；The second cavity of 226-；227- the 5th
Duct；23- servo spool device；231- servo valve body；The first valve port of 2311-；The second valve port of 2312-；232- servo spool；
233- servo valve valve rod；24- servo motor；241- output shaft；242- servo motor sleeve；25- shaft coupling；26- lead screw；261-
Ball screw；262- nut；3- plunger case；31- plunger cylinder；311- second pressure oil-in；32- plunger；321- third
Cavity.
Specific embodiment
Specifically describe particular content of the invention with reference to the accompanying drawings of the specification.
Referring to Figure of description 1-2, a kind of large hydraulic press crossbeam electrical servo levelling device, including crossbeam 1 and with institute
4 hydro -leveling devices of 1 lower end surface of crossbeam connection are stated, 4 hydro -leveling devices are separately positioned at four angles of crossbeam 1,
Each hydro -leveling device includes an electro-hydraulic servo cylinder 2 and a plunger case 3, and the electro-hydraulic servo cylinder 2 is used for
Crossbeam is finely adjusted, the plunger case 3 is used to carry out coarse adjustment to crossbeam, and electro-hydraulic servo cylinder 2 is set to the upper of plunger case 3
Side, the bottom end of the electro-hydraulic servo cylinder 2 is fixedly connected with the top of plunger case.
As shown in Figure 1, electro-hydraulic servo cylinder 2 includes servoBcylinder cylinder body 21, the servo being arranged in servoBcylinder cylinder body 21
The cylinder piston 22, servo spool device 23, the servo motor 24 for controlling servo spool device 23 and the control servo motor 24
PLC control system.The servoBcylinder cylinder body 21 includes servo cylinder barrel 211, the servoBcylinder that 211 upper end of servo cylinder barrel is arranged in
Cylinder cap 212 and the servoBcylinder flange 213 that 211 lower end of servo cylinder barrel is set.The servo the cylinder piston 22 includes being located at top
Upper piston and lower piston positioned at lower part, there are gaps with 211 inner surface of servo cylinder barrel for the upper piston, described
Upper piston upper end stretches out servo cylinder barrel 211 and connect, preferably hingedly, the lower piston and servoBcylinder with crossbeam lower end surface
211 inner surface of cylinder is in contact, under the inner cavity of servoBcylinder cylinder body 21 is divided into superposed A chamber and be located at by the lower piston
The B chamber in portion.The first cavity 221 of bottom end opening is offered in the servo the cylinder piston 22, first cavity 221 is for accommodating
Servo spool device 23, the servo spool device 23 include servo valve body 231, servo spool 232 and servo valve valve rod 233,
The servo valve body 231 is interference fitted with servo the cylinder piston 22, and the servo spool 232 is arranged inside servo valve body 231, institute
The upper end connection servo spool 232 of servo valve valve rod 233 is stated, the lower end of the servo valve valve rod 233 passes through shaft coupling 25 and silk
Thick stick 26 connects servo motor 24, and the lead screw 26 includes ball-screw 261 and nut 262.Specific connection type is servo motor
24 output shaft 241 is connected with ball-screw 261 by shaft coupling 25, and the nut 262 on ball-screw 261 is connected by screw to
233 lower end of servo valve valve rod.Servo motor sleeve 242 is additionally provided on the servo motor 24.
As shown in Figs. 1-2, the duct moved accordingly for pressure oil stream and discrepancy are also provided on electro-hydraulic servo cylinder 2
Mouthful.The first pressure oil-in 2111 for entering A chamber for pressure oil stream is provided on the servoBcylinder cylinder body 21, it is preferable that the first pressure
Power oil-in 2111 is set on servo cylinder barrel 211, it is highly preferred that the first pressure oil-in 2111 is set to servoBcylinder
211 upper end of cylinder is close to the position of servoBcylinder cylinder cap 212.It is additionally provided on the servoBcylinder cylinder body 21 for pressure oil stream oil return box
Oil outlet 2112, it is preferable that the oil outlet 2112 is set on servo cylinder barrel 211.It is set in the servo the cylinder piston 22
It is equipped with the first duct 222 and the second duct 223 of connection A chamber and servo spool device 23, first duct 222 and the second hole
It is connected between road 223, corresponding second duct 223 is provided with the first valve port 2311, the connection of the first valve port 2311 on servo valve body 231
Second duct 223 and servo spool 232；Connection B chamber and servo spool device 23 are additionally provided in the servo the cylinder piston 22
Third duct 224 and the 4th duct 225 are connected between the third duct 224 and the 4th duct 225, right on servo valve body 231
The 4th duct 225 is answered to be provided with the second valve port 2312, the second valve port 2312 is connected to the 4th duct 225 and servo spool 232.It is described
The second cavity 226 being connected to oil outlet 2112, second cavity 226 are formed between lower piston and servo cylinder barrel 211
With certain height, when the height guarantees that servo the cylinder piston 22 moves up and down, second cavity 226 always with oil outlet
2112 connections.The 5th duct 227 of connection the first cavity 221 and the second cavity 226 is provided in the servo the cylinder piston 22.The
When one valve port 2311 is opened, pressure oil enters A chamber from first pressure oil-in 2111, successively passes through the first hole according to sequence of flow
Road 222, the second duct 223 and the first valve port 2311 enter B chamber, and B cavity area is greater than A cavity area, form differential connection, servo
The cylinder piston 22 moves upwards under the impetus of pressure oil, and then crossbeam 1 is pushed to move upwards；Second valve port 2312 is opened
When, pressure oil successively passes through third duct 224, the 4th duct 225, the second valve port 2312, the first chamber from B chamber according to sequence of flow
Body 221, the 5th duct 227, the second cavity 226 and oil outlet 2112 flow back to fuel tank, and servo the cylinder piston 22 moves downward, and then band
Dynamic crossbeam 1 moves downward.
The opening and closing of first valve port 2311 and the second valve port 2312 is controlled by the servo spool 232 in servo spool device 23
System.The upper and lower ends of the servo spool 232 are provided with chamfering, i.e., upper end chamfer and lower end chamfer, first valve port
2311 are set to the position above lower end chamfer and close to lower end chamfer, and second valve port 2312 is set to below end chamfer
And close to the position of upper end chamfer.Preferably, the minimum point of first valve port 2311 is with the highest point of lower end chamfer same
On horizontal line, the minimum point of the highest point of second valve port 2311 and upper end chamfer is in the same horizontal line.When valve port with watch
When taking generation deviation between spool 232, corresponding valve port corresponds to chamfering position, then corresponding valve port is opened, and does not correspond to chamfering position
Valve port is still in closed state.
It is generated when the servo motor 24 drives servo spool 232 to move upwards, between valve port and servo spool 232 inclined
Difference, the first valve port 2311 gradually open by corresponding lower end chamfer position, the first valve port 2311, and the pressure oil of A chamber enters B chamber, shape
At differential connection, pressure oil pushes servo the cylinder piston 22 to move upwards, it is intended to eliminate deviation, and attempt to close the first valve port
2311.When servo motor 24 persistently drives servo spool 232 to move upwards, then servo spool 232 constantly opens the first valve
Mouth 2311, and servo the cylinder piston 22 moves upwards under the action of pressure oil and is constantly trying to close the first valve port 2311, entirely
The second valve port 2312 does not correspond to chamfering position in the process, remains turned-off, and so repeats this process, servo the cylinder piston 22 automatically with
The displacement of track servo spool 232 is to adjust the horizontal position of crossbeam 1.The servo motor 24 drives servo spool 232 to transport downwards
When dynamic, deviation is generated between valve port and servo spool 232, the second valve port 2312 gradually corresponds to upper end chamfer position, the second valve port
2312 open, and pressure oil flows back to fuel tank from B chamber, and servo the cylinder piston 22 moves downward, it is intended to eliminate deviation, and attempt closing second
Valve port 2312, when servo motor 24 persistently drives servo spool 232 to move downward, then servo spool 232 constantly opens
Two valve ports 2312, and servo the cylinder piston 22 moves downward under the action of pressure oil and is constantly trying to close the second valve port 2312,
The first valve port 2311 does not correspond to chamfering position in whole process, remains turned-off, and so repeats this process, servo the cylinder piston 22 is certainly
The displacement of motion tracking servo spool 232 is to adjust the horizontal position of crossbeam 1.Preferably, when servo motor 24 rotates forward, servo is driven
Spool 232 moves upwards, and when servo motor 25 inverts, servo spool 232 is driven to move downward.
The PLC control system controls the operating of servo motor for detecting misalignment.The PLC control system
Divide the connection of four tunnels, respectively corresponds 4 hydro -leveling devices that crossbeam four corners are set, the PLC control system includes grating
Displacement sensor and PLC controller, be located at same cornerwise two hydro -leveling devices of crossbeam be one group, 4 hydraulic tune
Leveling device is divided into two groups, and simultaneously output pulse signal gives PLC to control for the cornerwise displacement of grating displacement sensor detection crossbeam
Offset deviation is calculated by comparing and exports control signal to servo motor for device, the PLC controller return pulse signal
24, drive servo spool 232 to rotate by servo motor 24, and then adjustment servo the cylinder piston 22 and crossbeam 1 are transported upward or downward
It is dynamic.Diagonal line is adjusted in sustained height, until two diagonal lines exist by one group of hydro -leveling device corresponding under diagonal line
Sustained height, adjustment finish.
The plunger case 3 includes that plunger cylinder 31, the plunger 32 being arranged in plunger cylinder 31 and plunger case are hydraulic
Plunger cylinder 31 is stretched out in the upper end of system, the plunger 32, and the upper end of the plunger 32 is provided with extension, the plunger 32
By 242 flanged joint of servo motor sleeve, the plunger 32 is equipped with upper end opening along axis for upper end and electro-hydraulic servo cylinder 2
For accommodating the third cavity 321 of servo motor 24, the side wall bottom end of the plunger cylinder 31 is provided with for pressure oil
The second pressure oil-in 311 flowed in and out.
The plunger case hydraulic system includes check valve and throttle valve, the check valve and throttle valve it is in parallel after, one end connects
Logical second pressure oil-in 311, the other end are connected to pressure oil.When needing upper adjusting height, 3 oil inlet of plunger case, the pressure oil
From throttle valve oil inlet, plunger 32 rises；When needing falling head, it is set under the active Hydraulic Cylinder crossbeam of crossbeam upper end
Row, plunger 32 decline, and plunger case 3 is fuel-displaced, and pressure oil is flowed out from check valve.4 throttle valve apertures having the same.
In the detailed process leveled to crossbeam, plunger case can be first passed through and carry out coarse adjustment, then again by electronic
Hydraulic servo cylinder is finely adjusted, the diagonal displacement of the lines of PLC control system real-time monitoring crossbeam, if do not leveled yet, PLC controller
Control pulse is sent to servo motor, until leveling.In such a way that coarse adjustment combines fine tuning, the essence of crossbeam leveling is increased
Degree.
Embodiments of the present invention are explained in detail above in conjunction with attached drawing, but the present invention is not limited to above-mentioned implementations
Mode within the knowledge of a person skilled in the art can also be in the premise for not departing from spirit of the invention
Under make a variety of changes.
Claims (10)
1. a kind of large hydraulic press crossbeam electrical servo levelling device, including crossbeam (1) and it is connect with the crossbeam (1) lower end surface
4 hydro -leveling devices, 4 hydro -leveling devices are separately positioned at four angles of crossbeam (1), which is characterized in that
The hydro -leveling device includes the plunger case (3) for coarse adjustment and the electro-hydraulic servo cylinder (2) for fine tuning, described electronic
The bottom end of hydraulic servo cylinder (2) is fixedly connected with the top of plunger case (3), and the electro-hydraulic servo cylinder (2) includes servoBcylinder
Cylinder body (21), the servo the cylinder piston (22) being arranged in servoBcylinder cylinder body (21), servo spool device (23), control servo spool
The servo motor (24) of device (23) and the PLC control system of the control servo motor (24), the servoBcylinder cylinder body (21)
On be provided with first pressure oil-in (2111) and oil outlet (2112).
2. a kind of large hydraulic press crossbeam electrical servo levelling device as described in claim 1, which is characterized in that the servo
The cylinder piston (22) include with servoBcylinder cylinder body (21) medial surface there are the upper piston in gap and with servoBcylinder cylinder body (21) on the inside of
The top of the lower piston that face is in contact, the upper piston is connect with the lower end surface of crossbeam (1), and the lower piston is by servo
The inner cavity of cylinder cylinder body (21) is divided into superposed A chamber and the B chamber positioned at lower part, is provided with confession on the servo the cylinder piston (22)
The duct of pressure oil flowing, the servo the cylinder piston (22) is interior to be provided with for accommodating servo spool device (23) and bottom opening
The first cavity (221), the lower end of the servo spool device (23) connect with servo motor (24), and pressure oil passes through described the
One pressure oil-in (2111) enters A chamber, and pressure oil enters B chamber by the duct, and pressure oil passes through duct and fuel-displaced
Mouth flows back to fuel tank.
3. a kind of large hydraulic press crossbeam electrical servo levelling device as claimed in claim 2, which is characterized in that the servo
Valve core device (23) includes servo valve body (231), servo spool (232) and servo valve valve rod (233), the servo valve body
(231) it is interference fitted with servo the cylinder piston (22), servo spool (232) is located in servo valve body (231), the servo valve valve rod
(233) upper end is connect with servo spool (232), servo valve valve rod (233) lower end by shaft coupling (25), lead screw (26) with
The output shaft (241) of servo motor (24) connects.
4. a kind of large hydraulic press crossbeam electrical servo levelling device as claimed in claim 3, which is characterized in that the servo
The first duct (222) and the second duct for being connected to A chamber and servo spool device (23) are provided in the cylinder piston (22)
(223), the first valve port of connection the second duct (223) and servo spool (232) is provided on the servo valve body (231)
(2311)；Be additionally provided on the servo the cylinder piston (22) connection B chamber and servo spool device (23) third duct (224) and
4th duct (225) is provided with the second of the 4th duct (225) of connection and servo spool (232) on the servo valve body (231)
Valve port (2312)；Second be connected to oil outlet (2112) is formed between the servo the cylinder piston (22) and servoBcylinder cylinder body (21)
Cavity (226) is provided with the 5th hole of connection the first cavity (221) and the second cavity (226) on the servo the cylinder piston (22)
Road (227).
5. a kind of large hydraulic press crossbeam electrical servo levelling device as claimed in claim 4, which is characterized in that the servo
Spool (232) upper and lower ends are provided with chamfering, and first valve port (2311) is located at the upper of end chamfer under servo spool (232)
Position square and close to lower end chamfer, second valve port (2312) are located at the lower section of end chamfer on servo spool (232) and lean on
The position of nearly upper end chamfer, when the servo motor (24) does not drive servo spool (232) to move, the first valve port (2311) and the
Two valve ports (2312) are in closed state；When the servo motor (24) drives servo spool (232) to move upwards, the first valve
At the corresponding lower end chamfer of mouth (2311), the first valve port (2311) is opened, and the second valve port (2312) is in close state；The servo
When motor (24) drives servo spool (232) to move downward, the second valve port (2312) corresponds at upper end chamfer, the second valve port
(2312) it opens, the first valve port (2311) is in close state.
6. a kind of large hydraulic press crossbeam electrical servo levelling device as claimed in claim 5, which is characterized in that described first
Under the minimum point of valve port (2311) and servo spool (232) highest point of end chamfer in the same horizontal line, second valve port
(2311) minimum point of end chamfer is in the same horizontal line on highest point and servo spool (232).
7. such as a kind of described in any item large hydraulic press crossbeam electrical servo levelling devices of claim 3-6, which is characterized in that
The servoBcylinder cylinder body (21) include servo cylinder barrel (211), setting servo cylinder barrel (211) upper end servoBcylinder cylinder cap
(212) and setting is in the servoBcylinder flange (213) of servo cylinder barrel (211) lower end, and the top of the servo the cylinder piston (22) is stretched
ServoBcylinder cylinder cap (212) is connect with the lower end surface of crossbeam (1) out, and the lower end of the servo valve valve rod (233) passes through servoBcylinder method
Blue (213), the lead screw (26) includes ball-screw (261) and nut (262), and the servo motor (24) passes through shaft coupling
(25) ball-screw (261) are connected, the nut (262) on the ball-screw (261) is connected by screw to servo valve valve rod
(233) lower end is provided with servo motor sleeve (242) on the servo motor (24).
8. a kind of large hydraulic press crossbeam electrical servo levelling device as claimed in claim 7, which is characterized in that the PLC
Control system includes grating displacement sensor and PLC controller, and the grating displacement sensor detects the cornerwise displacement of crossbeam
And output pulse signal, to PLC controller, offset deviation is calculated in the PLC controller return pulse signal by comparing
And it exports control signal and gives servo motor (24).
9. a kind of large hydraulic press crossbeam electrical servo levelling device as claimed in claim 8, which is characterized in that the plunger
Cylinder (3) includes the plunger (32) and plunger case hydraulic system of plunger cylinder (31), setting in plunger cylinder (31), described
By servo motor sleeve (242) flanged joint, the plunger (32) is interior for the upper end and electro-hydraulic servo cylinder (2) of plunger (32)
Equipped with the third cavity (321) for accommodating servo motor (24), setting second pressure oil enters on the plunger cylinder (31)
Mouth (311).
10. a kind of large hydraulic press crossbeam electrical servo levelling device as claimed in claim 9, which is characterized in that the column
Plug cylinder hydraulic system includes check valve and throttle valve, and the throttle valve and check valve enter after being arranged in parallel with the second pressure oil
Mouth (311) connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710818434.6A CN107605825B (en) | 2017-09-12 | 2017-09-12 | A kind of large hydraulic press crossbeam electrical servo levelling device |
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| CN201710818434.6A CN107605825B (en) | 2017-09-12 | 2017-09-12 | A kind of large hydraulic press crossbeam electrical servo levelling device |
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| CN107605825A CN107605825A (en) | 2018-01-19 |
| CN107605825B true CN107605825B (en) | 2019-02-15 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111005853A (en) * | 2019-10-22 | 2020-04-14 | 陕西创威科技有限公司 | Pedal type pressure pump and calibration method |
| CN114457703A (en) * | 2022-03-09 | 2022-05-10 | 中铁四局集团有限公司设计研究院 | Bidirectional adjustable hanging basket device suitable for cantilever pouring construction and construction method |
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| CN2628257Y (en) * | 2003-08-07 | 2004-07-28 | 天津市天锻压力机有限公司 | Hydraulic press with sliding block downward vernier adjustment and buffer device |
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| CN107605825A (en) | 2018-01-19 |
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