CN107131162A - A kind of hydraulic control system for the double drive devices at a slow speed of large-sized grinder - Google Patents
A kind of hydraulic control system for the double drive devices at a slow speed of large-sized grinder Download PDFInfo
- Publication number
- CN107131162A CN107131162A CN201710306555.2A CN201710306555A CN107131162A CN 107131162 A CN107131162 A CN 107131162A CN 201710306555 A CN201710306555 A CN 201710306555A CN 107131162 A CN107131162 A CN 107131162A
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- mouths
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- hydraulic
- motor
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
- F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C25/00—Control arrangements specially adapted for crushing or disintegrating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/165—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for adjusting the pump output or bypass in response to demand
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/63—Electronic controllers
- F15B2211/6303—Electronic controllers using input signals
- F15B2211/6306—Electronic controllers using input signals representing a pressure
- F15B2211/6313—Electronic controllers using input signals representing a pressure the pressure being a load pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/665—Methods of control using electronic components
- F15B2211/6657—Open loop control, i.e. control without feedback
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/75—Control of speed of the output member
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D48/00—External control of clutches
- F16D48/02—Control by fluid pressure
- F16D2048/0257—Hydraulic circuit layouts, i.e. details of hydraulic circuit elements or the arrangement thereof
Abstract
A kind of hydraulic control system for the double drive devices at a slow speed of large-sized grinder, is related to a kind of hydraulic control system of drive device, including control loop, and the control loop includes open circuit and closed circuit；The present invention is by setting closed circuit to drive the rotation of grinding machine, and completion drives at a slow speed this own job function；Open circuit control brake, clutch are set, so as to realize grinding machine normal operating conditions and the at a slow speed interlocking between driving condition, it is ensured that large-sized grinder is capable of the purpose of safe operation when in inspecting state.
Description
【Technical field】
The present invention relates to a kind of hydraulic control system of drive device, it is used for large-sized grinder more particularly, to one kind double at a slow speed
The hydraulic control system of drive device.
【Background technology】
Grinding machine be it is a kind of apply very universal milling equipment, typically have two kinds of working conditions：Normal grinding working condition
And inspecting state, rotating speed is generally 14-30r/min when grinding machine is in grinding working condition, is driven by main motor；When grinding machine is in
Rotation speed requirements are very low during inspecting state, generally 0.1r/min or so, driven by drive device at a slow speed, drive device conduct at a slow speed
Its effect of grinding machine important component is not allowed to substitute, installation and maintenance period grinding machine to the security requirement of slow driving device very
Height, all the time, slow driving device are driven using motor, referred to as electronic slow drive, with the increase of grinding machine specification, the installation of grinding machine
Power is also increasing, due to Gear Processing and carrying, will turn into development trend using the grinding machine of twin-engined drives, at this
Because load is increased in the case of kind, in addition in order to reduce the gear-driven unbalance loading of size, and decelerator speed than the limitation of design,
It can not be met and require that using single slow driving device, the configuration application of double slow driving devices will turn into mainstay scheme, from
Synchronism, the reliability of braking that floor space, two slow driving devices drive, and big little gear and main reducing gear carrying and speed
Than in terms of optimization analyze, not only control upper relatively difficult to achieve, cost higher using double electronic slow driving devices, and security, can
It is not high by property, therefore do not used by home and abroad user.
【The content of the invention】
In order to overcome the shortcomings of in background technology, the present invention discloses a kind of liquid for the double drive devices at a slow speed of large-sized grinder
Pressure control system, by setting closed circuit to drive the rotation of grinding machine, completion drives at a slow speed this own job function；Open type is set to return
Road control brake, clutch, so as to realize grinding machine normal operating conditions and the at a slow speed interlocking between driving condition, it is ensured that large-scale
Grinding machine is capable of the purpose of safe operation when in inspecting state.
In order to realize the goal of the invention, the present invention is adopted the following technical scheme that：
A kind of hydraulic control system for the double drive devices at a slow speed of large-sized grinder, including fuel tank 1, in addition to control back
Road, the control loop includes open circuit and closed circuit；
The closed circuit includes transfer tube, slippage pump, proportion electro-magnet and stroking mechanism, safety valve A, safety valve B, benefit
Oily check valve A, repairing check valve B, repairing check valve C, repairing check valve D, repairing check valve E, repairing check valve F, auxiliary are overflow
Flow valve, outlet filter, heat exchange valve, heat exchange overflow valve, cooler, return filter, oil absorption filter, pressure sensor A, pressure
Force snesor B, pressure sensor C, pressure sensor D, balanced valve A, balanced valve B, hydraulic motor A, hydraulic motor B, brake
A, brake B, decelerator A and decelerator B, the T mouths of the proportion electro-magnet and stroking mechanism, the A mouths of oil absorption filter, oil return
The B mouths of filter, hydraulic motor A T mouths, hydraulic motor B T mouths are connected with fuel tank respectively with the T mouths of auxiliary overflow valve, institute
State the S mouths of slippage pump with the B mouths of oil absorption filter to be connected, the A mouths of the transfer tube, safety valve A P mouths, repairing check valve A
B mouths, the A mouths of heat exchange valve, balanced valve A A mouths be connected with balanced valve B A mouths, B mouths, the safety valve B P of the transfer tube
Mouth, repairing check valve B B mouths, the B mouths of heat exchange valve, balanced valve A A1 mouths are connected with balanced valve B A1 mouths, the slippage pump
P mouths be connected with the A mouths of outlet filter, the B mouths of the outlet filter and the P mouths of proportion electro-magnet and stroking mechanism,
Repairing check valve A A mouths, repairing check valve B A mouths, repairing check valve C A mouths, repairing check valve D A mouths, repairing are unidirectional
Valve E A mouths, repairing check valve F A mouths, safety valve A T mouths, safety valve B T mouths are connected with the P mouths of auxiliary overflow valve, institute
The P mouths for stating heat exchange valve are connected with the P mouths of heat exchange overflow valve, and the T mouths of the heat exchange overflow valve are connected with the A mouths of cooler,
The B mouths of the cooler are connected with the A mouths of return filter, the B mouths of the repairing check valve C, hydraulic motor A B mouths, pressure
Force snesor A oil inlet is connected with balanced valve A B1 mouths, the B mouths of the repairing check valve D, hydraulic motor B B mouths, pressure
Force snesor B oil inlet is connected with balanced valve B B1 mouths, the B mouths of the repairing check valve E, hydraulic motor A A mouths, pressure
Force snesor C oil inlet is connected with balanced valve A B mouths, the B mouths of the repairing check valve F, hydraulic motor B A mouths, pressure
Force snesor D oil inlet is connected with balanced valve B B mouths；
The open circuit includes controlling pump, electromagnetic relief valve, Solenoid ball valve A, Solenoid ball valve B, Solenoid ball valve C, electromagnetism
Reversal valve A, solenoid directional control valve B, hydraulic control one-way valve A, hydraulic control one-way valve B, Double throttle check valve A, Double throttle check valve B, shunting
Motor A, diffluence motor B, clutch driving hydraulic cylinder A, clutch driving hydraulic cylinder B, clutch driving hydraulic cylinder C, clutch
Driving hydraulic cylinder D, travel switch A, travel switch B, travel switch C, travel switch D, pressure switch A, pressure switch B, clutch
Device A and clutch B；The S mouths of the controlling pump, Solenoid ball valve C T mouths, the T mouths of electromagnetic relief valve, solenoid directional control valve A T mouths,
Solenoid directional control valve B T mouths, diffluence motor A T mouths, diffluence motor B T mouths are also connected with fuel tank respectively, the controlling pump
P mouthfuls, solenoid directional control valve A P mouths, solenoid directional control valve B P mouths, Solenoid ball valve C P mouths, P mouths, the Solenoid ball valve of electromagnetic relief valve
A P1 mouths are connected with Solenoid ball valve A P3 mouths, and the A mouths of the solenoid directional control valve A are connected with hydraulic control one-way valve A A1 mouths,
The B mouths of the solenoid directional control valve A are connected with hydraulic control one-way valve A A mouths, the A mouths and hydraulic control one-way valve of the solenoid directional control valve B
B A1 mouths are connected, and the B mouths of the solenoid directional control valve B are connected with hydraulic control one-way valve B A mouths, the B of the hydraulic control one-way valve A
Mouth is connected with Double throttle check valve A A mouths, and the B1 mouths of the hydraulic control one-way valve A are connected with Double throttle check valve A A1 mouths, institute
State hydraulic control one-way valve B B mouths with Double throttle check valve B A mouths to be connected, the B1 mouths of the hydraulic control one-way valve B and double one-way throttles
Valve B A1 mouths are connected, and the B mouths of the Double throttle check valve A are connected with diffluence motor A P mouths, Double throttle check valve A B1
Mouth is connected with clutch driving hydraulic cylinder A A mouthfuls of rod chamber, clutch driving hydraulic cylinder B A mouthfuls of rod chamber, the shunting
Motor A P1 mouths are connected with clutch driving hydraulic cylinder A B1 mouthfuls of rodless cavity, and diffluence motor A P2 mouths and clutch drive
Hydraulic cylinder B B2 mouthfuls of rodless cavity is connected, and the B mouths of the Double throttle check valve B are connected with diffluence motor B P mouths, double unidirectional
Choke valve B B1 mouths are connected with clutch driving hydraulic cylinder C A mouthfuls of rod chamber, clutch driving hydraulic cylinder D A mouthfuls of rod chamber
Connect, the P1 mouths of the diffluence motor B are connected with clutch driving hydraulic cylinder C B1 mouthfuls of rodless cavity, diffluence motor B P2 mouths and
Clutch driving hydraulic cylinder D B2 mouthfuls of rodless cavity is connected, the A mouths of the Solenoid ball valve C and Solenoid ball valve B P1 mouths, electromagnetism
Ball valve B P3 mouths are connected, P2 mouths, pressure switch A oil inlet and the braking of the P2 mouths, Solenoid ball valve B of the Solenoid ball valve A
Device B oil inlet is connected, P4 mouths, pressure switch B oil inlet and the braking of the P4 mouths, Solenoid ball valve B of the Solenoid ball valve A
Device A oil inlet is connected, and the travel switch A and travel switch B are arranged on the left and right two on clutch A straight-line trajectories
Individual extreme position, the travel switch C and travel switch D are arranged on the limit of left and right two on clutch B straight-line trajectories
Position；
Described is used for the hydraulic control system of the double drive devices at a slow speed of large-sized grinder, the transfer tube, the drive of controlling pump
Dynamic motor, the magnetic valve of proportion electro-magnet and stroking mechanism, pressure sensor A, pressure sensor B, pressure sensor C, pressure
Sensor D, electromagnetic relief valve, Solenoid ball valve A, Solenoid ball valve B, Solenoid ball valve C, solenoid directional control valve A, solenoid directional control valve B, stroke
Switch A, travel switch B, travel switch C, travel switch D, pressure switch A, pressure switch B turn together with for measuring grinding mill barrel
The photoelectric encoder of speed is respectively connected to controller.
Due to using technical scheme as described above, the present invention has the advantages that：
Hydraulic control system of the present invention for the double drive devices at a slow speed of large-sized grinder, comprising closed circuit
Rotation not only separate but also interrelated with open circuit, driving grinding machine by setting closed circuit to be used for, completion is driven at a slow speed
Move this own job function；Open circuit is set to be used for control brake, clutch, so as to realize grinding machine normal operating conditions and slow
Interlocking between fast driving condition, it is ensured that large-sized grinder is capable of the purpose of safe operation when in inspecting state；The present invention is set
Meter is reasonable, energy-saving significantly, and using effect is good.
【Brief description of the drawings】
Fig. 1 is structural representation of the invention；
In figure：1st, fuel tank；2nd, transfer tube；3rd, slippage pump；4th, proportion electro-magnet and stroking mechanism；5.1st, safety valve A；5.2、
Safety valve B；6.1st, repairing check valve A；6.2nd, repairing check valve B；6.3rd, repairing check valve C；6.4th, repairing check valve D；6.5、
Repairing check valve E；6.6th, repairing check valve F；7th, auxiliary overflow valve；8th, outlet filter；9th, heat exchange valve；10th, exchange heat overflow valve；
11st, cooler；12nd, return filter；13rd, oil absorption filter；14.1st, pressure sensor A；14.2nd, pressure sensor B；14.3、
Pressure sensor C；14.4th, pressure sensor D；15.1st, balanced valve A；15.2nd, balanced valve B；16.1st, hydraulic motor A；16.2, liquid
Pressure motor B；17.1st, brake A；17.2nd, brake B；18.1st, decelerator A；18.2nd, decelerator B；19th, controlling pump；20th, electromagnetism
Overflow valve；21st, Solenoid ball valve A；22nd, Solenoid ball valve B；23rd, Solenoid ball valve C；24.1st, solenoid directional control valve A；24.2, electromagnetic switch
Valve B；25.1st, hydraulic control one-way valve A；25.2nd, hydraulic control one-way valve B；26.1st, Double throttle check valve A；26.2nd, Double throttle check valve B；
27.1st, diffluence motor A；27.2nd, diffluence motor B；28.1st, clutch driving hydraulic cylinder A；28.2nd, clutch driving hydraulic cylinder B；
28.3rd, clutch driving hydraulic cylinder C；28.4th, clutch driving hydraulic cylinder D；29.1st, travel switch A；29.2nd, travel switch B；
29.3rd, travel switch C；29.4th, travel switch D；30.1st, pressure switch A；30.2nd, pressure switch B；31.1st, clutch A；
31.2nd, clutch B.
【Embodiment】
The present invention can be explained in more detail by the following examples, the invention is not limited in the following examples,
The open purpose of the present invention is intended to protect all changes and improvements in the scope of the invention.
It is used for the hydraulic control system of the double drive devices at a slow speed of large-sized grinder, including fuel tank 1 with reference to described in accompanying drawing 1, also
Including control loop, the control loop includes open circuit and closed circuit；The closed circuit includes transfer tube 2, repairing
Pump 3, proportion electro-magnet and stroking mechanism 4, safety valve A5.1, safety valve B5.2, repairing check valve A6.1, repairing check valve
B6.2, repairing check valve C6.3, repairing check valve D6.4, repairing check valve E6.5, repairing check valve F6.6, auxiliary overflow valve 7,
Outlet filter 8, heat exchange valve 9, heat exchange overflow valve 10, cooler 11, return filter 12, oil absorption filter 13, pressure sensing
Device A14.1, pressure sensor B14.2, pressure sensor C14.3, pressure sensor D14.4, balanced valve A15.1, balanced valve
B15.2, hydraulic motor A16.1, hydraulic motor B16.2, brake A17.1, brake B17.2, decelerator A18.1 and decelerator
B18.2, the T mouths of the proportion electro-magnet and stroking mechanism 4, the A mouths of oil absorption filter 13, B mouths, the hydraulic pressure of return filter 12
Motor A16.1 T mouths, hydraulic motor B16.2 T mouths are connected with fuel tank 1 respectively with the T mouths of auxiliary overflow valve 7, the repairing
The S mouths of pump 3 are connected with the B mouths of oil absorption filter 13, the A mouths of the transfer tube 2, safety valve A5.1 P mouths, repairing check valve
A6.1 B mouths, the A mouths of heat exchange valve 9, balanced valve A15.1 A mouths are connected with balanced valve B15.2 A mouths, the transfer tube 2
B mouthfuls, safety valve B5.2 P mouths, repairing check valve B6.2 B mouths, the B mouths of heat exchange valve 9, balanced valve A15.1 A1 mouths and balance
Valve B15.2 A1 mouths are connected, and the P mouths of the slippage pump 3 are connected with the A mouths of outlet filter 8, the outlet filter 8
B mouths and the P mouths of proportion electro-magnet and stroking mechanism 4, repairing check valve A6.1 A mouths, repairing check valve B6.2 A mouths, mend
Oily check valve C6.3 A mouths, repairing check valve D6.4 A mouths, repairing check valve E6.5 A mouths, repairing check valve F6.6 A
Mouth, safety valve A5.1 T mouths, safety valve B5.2 T mouths are connected with the P mouths of auxiliary overflow valve 7, the P mouths of the heat exchange valve 9 and
The P mouths of heat exchange overflow valve 10 are connected, and the T mouths of the heat exchange overflow valve 10 are connected with the A mouths of cooler 11, the cooler
11 B mouths are connected with the A mouths of return filter 12, the B mouths of the repairing check valve C6.3, hydraulic motor A16.1 B mouths,
Pressure sensor A14.1 oil inlet is connected with balanced valve A15.1 B1 mouths, B mouths, the hydraulic pressure of the repairing check valve D6.4
Motor B16.2 B mouths, pressure sensor B14.2 oil inlet is connected with balanced valve B15.2 B1 mouths, and the repairing is unidirectional
Valve E6.5 B mouths, hydraulic motor A16.1 A mouths, pressure sensor C14.3 oil inlet are connected with balanced valve A15.1 B mouths
Connect, the B mouths of the repairing check valve F6.6, hydraulic motor B16.2 A mouths, pressure sensor D14.4 oil inlet and balanced valve
B15.2 B mouths are connected；The open circuit includes controlling pump 19, electromagnetic relief valve 20, Solenoid ball valve A21, Solenoid ball valve
B22, Solenoid ball valve C23, solenoid directional control valve A24.1, solenoid directional control valve B24.2, hydraulic control one-way valve A25.1, hydraulic control one-way valve
B25.2, Double throttle check valve A26.1, Double throttle check valve B26.2, diffluence motor A27.1, diffluence motor B27.2, clutch
Driving hydraulic cylinder A28.1, clutch driving hydraulic cylinder B28.2, clutch driving hydraulic cylinder C28.3, clutch driving hydraulic cylinder
D28.4, travel switch A29.1, travel switch B29.2, travel switch C29.3, travel switch D29.4, pressure switch A30.1,
Pressure switch B30.2, clutch A31.1 and clutch B31.2；The S mouths of the controlling pump 19, Solenoid ball valve C23 T mouths, electricity
The T mouths of magnetic overflow valve 20, solenoid directional control valve A24.1 T mouths, solenoid directional control valve B24.2 T mouths, diffluence motor A27.1 T mouths,
Diffluence motor B27.2 T mouths are also connected with fuel tank 1 respectively, the P mouths of the controlling pump 19, solenoid directional control valve A24.1 P mouths,
Solenoid directional control valve B24.2 P mouths, Solenoid ball valve C23 P mouths, the P mouths of electromagnetic relief valve 20, Solenoid ball valve A21 P1 mouths and electricity
Magnetic ball valve A21 P3 mouths are connected, and the A mouths of the solenoid directional control valve A24.1 are connected with hydraulic control one-way valve A25.1 A1 mouths,
The B mouths of the solenoid directional control valve A24.1 are connected with hydraulic control one-way valve A25.1 A mouths, the A mouths of the solenoid directional control valve B24.2
It is connected with hydraulic control one-way valve B25.2 A1 mouths, the B mouths of the solenoid directional control valve B24.2 and hydraulic control one-way valve B25.2 A mouths
It is connected, the B mouths of the hydraulic control one-way valve A25.1 are connected with Double throttle check valve A26.1 A mouths, the hydraulic control one-way valve
A25.1 B1 mouths are connected with Double throttle check valve A26.1 A1 mouths, the B mouths of the hydraulic control one-way valve B25.2 and double one-way throttles
Valve B26.2 A mouths are connected, and the B1 mouths of the hydraulic control one-way valve B25.2 are connected with Double throttle check valve B26.2 A1 mouths, described
Double throttle check valve A26.1 B mouths are connected with diffluence motor A27.1 P mouths, Double throttle check valve A26.1 B1 mouths with from
Clutch driving hydraulic cylinder A28.1 A mouthfuls of rod chamber, clutch driving hydraulic cylinder B28.2 A mouthfuls of rod chamber are connected, described point
Stream motor A27.1 P1 mouths are connected with clutch driving hydraulic cylinder A28.1 B1 mouthfuls of rodless cavity, diffluence motor A27.1 P2
Mouth is connected with clutch driving hydraulic cylinder B28.2 B2 mouthfuls of rodless cavity, the B mouths of the Double throttle check valve B26.2 and shunting
Motor B27.2 P mouths are connected, the rod chamber A of Double throttle check valve B26.2 B1 mouths and clutch driving hydraulic cylinder C28.3
Mouth, clutch driving hydraulic cylinder D28.4 A mouthfuls of rod chamber are connected, and the P1 mouths and clutch of the diffluence motor B27.2 drive
Hydraulic cylinder C28.3 B1 mouthfuls of rodless cavity is connected, diffluence motor B27.2 P2 mouths and clutch driving hydraulic cylinder D28.4 nothing
B2 mouthfuls of rod cavity is connected, and the A mouths of the Solenoid ball valve C23 are connected with Solenoid ball valve B22 P1 mouths, Solenoid ball valve B22 P3 mouths
Connect, the P2 mouths of the Solenoid ball valve A21, Solenoid ball valve B22 P2 mouths, pressure switch A30.1 oil inlet and brake B17.2
Oil inlet be connected, the P4 mouths of the Solenoid ball valve A21, Solenoid ball valve B22 P4 mouths, pressure switch B30.2 oil inlet
It is connected with brake A17.1 oil inlet, the travel switch A29.1 and travel switch B29.2 are arranged on clutch A31.1
The extreme position of left and right two on straight-line trajectory, the travel switch C29.3 and travel switch D29.4 are arranged on clutch
The extreme position of left and right two on B31.2 straight-line trajectories；The transfer tube 2, the motor of controlling pump 19, ratio electromagnetism
Magnetic valve, pressure sensor A14.1, pressure sensor B14.2, pressure sensor C14.3, the pressure of iron and stroking mechanism 4 are passed
Sensor D14.4, electromagnetic relief valve 20, Solenoid ball valve A21, Solenoid ball valve B22, Solenoid ball valve C23, solenoid directional control valve A24.1, electricity
Magnetic reversal valve B24.2, travel switch A29.1, travel switch B29.2, travel switch C29.3, travel switch D29.4, pressure are opened
Close A30.1, pressure switch B30.2 and be respectively connected to controller together with the photoelectric encoder for measuring grinding mill barrel rotating speed.
Implement the hydraulic control system of the present invention for the double drive devices at a slow speed of large-sized grinder, with following spy
Point：
" the invariable power regulation " 1. of hydraulic system closed circuit
The realization driven at a slow speed of grinding machine is completed by the closed circuit in the system, and transfer tube 2 is with constant in closed circuit
Rotating speed is rotated, and hydraulic motor A16.1, hydraulic motor B16.2 are controlled by changing the size and Orientation of discharge capacity of transfer tube 2
Rotating speed and direction of rotation；And " invariable power " regulative mode is used, the discharge capacity of transfer tube 2 is higher, slow drive speed is faster；And system
Operating pressure is bigger, and slow driving device output torque is bigger；Under certain rotating speed, the discharge capacity of transfer tube 2 and the product of operating pressure
For the power of motor of transfer tube 2, so in the case where the power of motor of transfer tube 2 is certain, controller is by detecting that enclosed is returned
What pressure sensor A14.1, pressure sensor B14.2, pressure sensor C14.3 and pressure sensor D14.4 in road fed back
Signal, can reduce the output flow of transfer tube 2 according to actual condition, that is, reduce rotating speed of the grinding machine slowly under drive state, be used for into
One step improves the driving force of slow driving device, so as to improve working range and applicable ability that hydraulic pressure drives slowly；
" the electric proportion adjustment " 2. of hydraulic system closed circuit
The variable regulative mode of transfer tube 2 is electric proportional control, and its flow exported and direction are directly proportional to control signal,
By inputing to the change of the size and Orientation of electric current on proportion electro-magnet and stroking mechanism 4, and in the work of the pressure oil of slippage pump 3
It can change the size and Orientation of the output flow of transfer tube 2 with lower, and then make the flow of transfer tube 2 is proportional to change,
Make powered hydraulic motor A16.1, the speed of hydraulic motor B16.2 both directions and acceleration, deceleration can be smart
Really control；
Specific work process is as follows：When controller to the proportion electro-magnet and stroking mechanism 4 in the stroking mechanism of transfer tube 2 just
During signal, the electromagnet b in proportion electro-magnet and stroking mechanism 4 is powered, and control oil promotes variable piston to move right, transfer tube
2 A mouth pressure oil outputs, pressure oil is sent into hydraulic motor A16.1 A mouths, work as brake by balanced valve A15.1 all the way
A17.1 is in when opening a sluice gate state, and hydraulic motor A16.1 driving decelerators A18.1 rotates；Same another road through balanced valve B15.2,
Pressure oil is sent into hydraulic motor B16.2 A mouths, when brake B17.1, which is in, opens a sluice gate state, hydraulic motor B16.2 drivings
Decelerator B18.2 rotates.When clutch A31.1, clutch B31.2 " close " simultaneously, decelerator A18.1, decelerator B18.2
It is common to drive grinding machine to rotate forward；
B mouths from hydraulic motor A16.1 B mouths through the balanced valve A15.1 hydraulic oil flowed out and from hydraulic motor B16.2 are passed through
The hydraulic oil of balanced valve B15.2 outflows returns to the B mouths of transfer tube 2 jointly；
When controller is to 4 negative signal of proportion electro-magnet and stroking mechanism in the stroking mechanism of transfer tube 2, proportion electro-magnet
And the electromagnet a of stroking mechanism 4 is powered, control oil promotes variable piston to be moved to the left, the B mouths output of transfer tube 2, so as to drive liquid
Pressure motor A16.1, hydraulic motor B16.2 are inverted, and grinding machine is also inverted therewith, and oil circuit is similar when being rotated forward with grinding machine, therefore repeats no more；
The hydraulic oil now flowed out from hydraulic motor A16.1 A mouths through balanced valve A15.1 and the A mouths from hydraulic motor B16.2 are through balance
The hydraulic oil of valve B15.2 outflows returns to the A mouths of transfer tube 2 jointly；
It should be further stated that:When clutch A31.1 " closing ", clutch B31.2 " disengagement ", grinding machine can only be by
Decelerator A18.1 drives；Otherwise when clutch B31.2 " closing ", clutch A31.1 " disengagement ", grinding machine can only be by decelerator
B18.1 drives；This function can be such that grinding machine is simultaneously driven by two slow driving devices, also can be by one slow drive of any of which
Device is operated alone, and facilitates two clutches " to tooth ", unbalance loading operating mode occurs in gear, this function is largely effective；
For large-sized mining grinding mill because load is big, rotary inertia is big, and hydraulic motor A16.1 is furnished with balanced valve in the system
A15.1, no matter hydraulic motor A16.1 is in main story or reversion, and hydraulic motor A16.1 oil-feed and oil extraction can pass through balanced valve
A15.1, hydraulic motor A16.1 I/O traffic can be balanced valve A15.1 and effectively carry out throttling control for brake, it is to avoid
When under Exceed load operating mode, hydraulic motor A16.1, because of the danger that fuel feeding is not enough and damages, and grinding machine choosing turn also more may be used
Lean on, while hydraulic motor A16.1 output shafts are provided with brake A17.1, brake A17.1 can be protected under operating mode under overload
Hydraulic motor A16.1 is protected, the requirement to safety arrestment during grinding machine maintenance can be met again；
It is furnished with balanced valve B15.2 on hydraulic motor B16.2 inlet and outlet of fuel channel, hydraulic motor B16.2 output shafts are provided with system
Dynamic device B17.2；Balanced valve B15.2 is identical with balanced valve A15.1, and brake B17.2 is identical with brake A17.1, therefore no longer goes to live in the household of one's in-laws on getting married
State.
" the electro-hydraulic closed-loop control " 3. of hydraulic system closed circuit
Said from grinding process angle, when grinding machine is shut down it is small more than 4 when more than when, the material in grinding mill barrel may freeze
Knot, now grinding machine should be at driving working condition slowly, and be in poised state as early as possible as far as possible；For this operating mode, this hydraulic pressure system
System can possess an important control function by " electro-hydraulic closed-loop control " -- and " anti-material freezes "；Specifically：In grinding machine
Before the load of inner barrel rushes down, the operating pressure of transfer tube 2 can rise always, if system pressure is got on certain angle
Come higher, then grind interior material imbalance, be judged as that material freezes；Now slow drive must rotate and reverse, and make grinding machine towards load
It is roughly equal i.e. in poised state that direction rotates the guarantee lateral load of grinding machine two；
In hydraulic system closed circuit:Hydraulic motor A16.1 A mouths are equipped with pressure for C14.3, B mouthfuls equipped with pressure sensor
Sensors A 14.1, hydraulic motor B16.2 A mouths are equipped with pressure sensor B14.2 for D14.4, B mouthfuls equipped with pressure sensor, in addition
Photoelectric encoder for detecting grinding mill barrel rotating speed.Controller is by detecting the feedback signals of these electric elements, effectively control
The positive and negative and size of the input signal of proportion electro-magnet and stroking mechanism 4, makes the side of the output flow of transfer tube 2 in transfer tube 2 processed
To being automatically adjusted with size, so that grinding machine automatically realizes main story, reversion, the material loosening freezed in mill is realized；Work as control
Device detects the pressure sensor C14.3 being connected with hydraulic motor A16.1 A mouths and is connected with hydraulic motor A16.1 B mouths
When pressure sensor A14.1 feedback signal is of substantially equal, and controller is detected and is connected with hydraulic motor B16.2 A mouths
Pressure sensor D14.4 and the pressure sensor B14.2 being connected with hydraulic motor B16.2 B mouths the basic phase of feedback signal
Deng when then grind interior material and basically reached poised state；
The closed circuit of this hydraulic system integrates " electric proportion adjustment ", " invariable power regulation ", " electro-hydraulic closed-loop control " realization
The slow moment of torsion and automatic matching rotating speed for driving the slow driving device output in drift angle, hydraulic pressure that grinding machine rotates under operating mode, not only can be improved
The automation of mill driving system, intelligent level and it can undoubtedly greatly improve the security reliability of mill running；
4. the open circuit in a hydraulic system is used to control brake A17.1, the hydraulic motor on hydraulic motor A16.1
Brake B17.2 on B16.2, and clutch A31.1, clutch B31.2 engagement and disengagement；
In Double-hydraulic at a slow speed drive device, it be furnished with brake A17.1, hydraulic pressure horse on hydraulic motor A16.1 output shaft
It is furnished with brake B17.2 on up to B16.2 output shaft；Controlling pump 19 can effectively control brake A17.1, brake B17.2, make
Obtain grinding machine and be stably held in non-equilibrium site, so that operator is more safe when changing liner plate；And in brake
A17.1 oil passage is furnished with pressure switch B30.2, and brake B17.2 oil passage is furnished with pressure switch A30.1, works as controller
When detecting pressure switch and sending signal, illustrate to be opened brake by pressure oil, now allow hydraulic motor to rotate, if not having
The signal that pressure switch is sent is detected, controller will not then rotate hydraulic motor, according to logical action relation shown in following table,
Not only brake A17.1, brake B17.2 single movement can be realized but also brake A17.1, brake can be realized
B17.2 is acted simultaneously, so as to realize two drive device single action or linkage actions at a slow speed；
Two at a slow speed the clutch A31.1 of drive device, clutch B31.2 opening and closing movement also completed by open circuit,
According to logical action relation shown in following table, clutch A31.1, clutch B31.2 single movement but also energy can be not only realized
Realize clutch A31.1, clutch B31.2 linkage action；
Open circuit magnetic valve action logic table
The specific work process that data more than can be seen that is：When being intended to realize " brake 17.1 is opened a sluice gate ", electromagnet
SV1, SV7, SV8 are powered, and remaining electromagnet is not charged, start the motor of controlling pump 19, controlling pump 19 directly from fuel tank oil suction, by
Powered in electromagnet SV1, the P mouths of controlling pump 19 are not connected with the T mouths of electromagnetic relief valve 20, so that system sets up pressure；
Electromagnet SV7 is powered, and Solenoid ball valve A21 P3 mouths are connected with Solenoid ball valve A21 P4 mouths so that the P mouths of controlling pump 19 are through electricity
Magnetic ball valve A21 P3 mouths, Solenoid ball valve A21 P4 mouths are output to brake A17.1 oil inlet, so that by brake A17.1
Open.Electromagnet SV8 is used for the oil return line of control brake 17.1, when its is powered, Solenoid ball valve B22 P3 mouths and electromagnetic ball
Valve B22 P4 mouths are not communicated with, so as to keep brake A17.1 input pressure constant, so as to maintain opening for brake 17.1
Lock state；
When pressure switch 30.2 (PS1 in the logical action table of the immediate boiling loop) detection in brake A17.1 oil passage
To pressure and when acting, controller can be signaled to, can now realize in logical action table " allows hydraulic motor 16.1 to revolve
Turn " functional status.
Remaining logical action describes similar, therefore repeats no more.
Part not in the detailed description of the invention is prior art.
Claims (2)
1. a kind of hydraulic control system for the double drive devices at a slow speed of large-sized grinder, including fuel tank（1）, it is characterized in that：Also wrap
Control loop is included, the control loop includes open circuit and closed circuit；
The closed circuit includes transfer tube（2）, slippage pump（3）, proportion electro-magnet and stroking mechanism（4）, safety valve A（5.1）、
Safety valve B（5.2）, repairing check valve A（6.1）, repairing check valve B（6.2）, repairing check valve C（6.3）, repairing check valve D
（6.4）, repairing check valve E（6.5）, repairing check valve F（6.6）, auxiliary overflow valve（7）, outlet filter（8）, heat exchange valve
（9）, heat exchange overflow valve（10）, cooler（11）, return filter（12）, oil absorption filter（13）, pressure sensor A
（14.1）, pressure sensor B（14.2）, pressure sensor C（14.3）, pressure sensor D（14.4）, balanced valve A（15.1）, it is flat
Weigh valve B（15.2）, hydraulic motor A（16.1）, hydraulic motor B（16.2）, brake A（17.1）, brake B（17.2）, slow down
Device A（18.1）With decelerator B（18.2）, the proportion electro-magnet and stroking mechanism（4）T mouths, oil absorption filter（13）A
Mouth, return filter（12）B mouths, hydraulic motor A（16.1）T mouths, hydraulic motor B（16.2）T mouths and auxiliary overflow valve
（7）T mouths respectively and fuel tank（1）It is connected, the slippage pump（3）S mouths and oil absorption filter（13）B mouths be connected, institute
State transfer tube（2）A mouths, safety valve A（5.1）P mouths, repairing check valve A（6.1）B mouths, heat exchange valve（9）A mouths, balance
Valve A（15.1）A mouths and balanced valve B（15.2）A mouths be connected, the transfer tube（2）B mouths, safety valve B（5.2）P
Mouth, repairing check valve B（6.2）B mouths, heat exchange valve（9）B mouths, balanced valve A（15.1）A1 mouths and balanced valve B（15.2）'s
A1 mouthfuls are connected, the slippage pump（3）P mouths and outlet filter（8）A mouths be connected, the outlet filter（8）B
Mouth and proportion electro-magnet and stroking mechanism（4）P mouths, repairing check valve A（6.1）A mouths, repairing check valve B（6.2）A mouths,
Repairing check valve C（6.3）A mouths, repairing check valve D（6.4）A mouths, repairing check valve E（6.5）A mouths, repairing check valve F
（6.6）A mouths, safety valve A（5.1）T mouths, safety valve B（5.2）T mouths and auxiliary overflow valve（7）P mouths be connected, it is described
Heat exchange valve（9）P mouths and heat exchange overflow valve（10）P mouths be connected, the heat exchange overflow valve（10）T mouths and cooler（11）
A mouths be connected, the cooler（11）B mouths and return filter（12）A mouths be connected, the repairing check valve C
（6.3）B mouths, hydraulic motor A（16.1）B mouths, pressure sensor A（14.1）Oil inlet and balanced valve A（15.1）B1
Mouth is connected, the repairing check valve D（6.4）B mouths, hydraulic motor B（16.2）B mouths, pressure sensor B（14.2）Enter
Hydraulic fluid port and balanced valve B（15.2）B1 mouths be connected, the repairing check valve E（6.5）B mouths, hydraulic motor A（16.1）A
Mouth, pressure sensor C（14.3）Oil inlet and balanced valve A（15.1）B mouths be connected, the repairing check valve F（6.6）'s
B mouthfuls, hydraulic motor B（16.2）A mouths, pressure sensor D（14.4）Oil inlet and balanced valve B（15.2）B mouths be connected；
The open circuit includes controlling pump（19）, electromagnetic relief valve（20）, Solenoid ball valve A（21）, Solenoid ball valve B（22）, electricity
Magnetic ball valve C（23）, solenoid directional control valve A（24.1）, solenoid directional control valve B（24.2）, hydraulic control one-way valve A（25.1）, hydraulic control one-way valve B
（25.2）, Double throttle check valve A（26.1）, Double throttle check valve B（26.2）, diffluence motor A（27.1）, diffluence motor B
（27.2）, clutch driving hydraulic cylinder A（28.1）, clutch driving hydraulic cylinder B（28.2）, clutch driving hydraulic cylinder C
（28.3）, clutch driving hydraulic cylinder D（28.4）, travel switch A（29.1）, travel switch B（29.2）, travel switch C
（29.3）, travel switch D（29.4）, pressure switch A（30.1）, pressure switch B（30.2）, clutch A（31.1）With clutch B
（31.2）；The controlling pump（19）S mouths, Solenoid ball valve C（23）T mouths, electromagnetic relief valve（20）T mouths, solenoid directional control valve A
（24.1）T mouths, solenoid directional control valve B（24.2）T mouths, diffluence motor A（27.1）T mouths, diffluence motor B（27.2）T mouths
Also respectively and fuel tank（1）It is connected, the controlling pump（19）P mouths, solenoid directional control valve A（24.1）P mouths, solenoid directional control valve B
（24.2）P mouths, Solenoid ball valve C（23）P mouths, electromagnetic relief valve（20）P mouths, Solenoid ball valve A（21）P1 mouths and electromagnetism
Ball valve A（21）P3 mouths be connected, the solenoid directional control valve A（24.1）A mouths and hydraulic control one-way valve A（25.1）A1 mouths be connected
Connect, the solenoid directional control valve A（24.1）B mouths and hydraulic control one-way valve A（25.1）A mouths be connected, the solenoid directional control valve B
（24.2）A mouths and hydraulic control one-way valve B（25.2）A1 mouths be connected, the solenoid directional control valve B（24.2）B mouths and hydraulic control list
To valve B（25.2）A mouths be connected, the hydraulic control one-way valve A（25.1）B mouths and Double throttle check valve A（26.1）A mouth phases
Even, the hydraulic control one-way valve A（25.1）B1 mouths and Double throttle check valve A（26.1）A1 mouths be connected, the hydraulic control one-way valve B
（25.2）B mouths and Double throttle check valve B（26.2）A mouths be connected, the hydraulic control one-way valve B（25.2）B1 mouths and double unidirectional
Choke valve B（26.2）A1 mouths be connected, the Double throttle check valve A（26.1）B mouths and diffluence motor A（27.1）P mouth phases
Connection, Double throttle check valve A（26.1）B1 mouths and clutch driving hydraulic cylinder A（28.1）A mouthfuls of rod chamber, clutch driving
Hydraulic cylinder B（28.2）A mouthfuls of rod chamber be connected, the diffluence motor A（27.1）P1 mouths and clutch driving hydraulic cylinder A
（28.1）B1 mouthfuls of rodless cavity be connected, diffluence motor A（27.1）P2 mouths and clutch driving hydraulic cylinder B（28.2）Without bar
B2 mouthfuls of chamber is connected, the Double throttle check valve B（26.2）B mouths and diffluence motor B（27.2）P mouths be connected, it is double unidirectional
Choke valve B（26.2）B1 mouths and clutch driving hydraulic cylinder C（28.3）A mouthfuls of rod chamber, clutch driving hydraulic cylinder D
（28.4）A mouthfuls of rod chamber be connected, the diffluence motor B（27.2）P1 mouths and clutch driving hydraulic cylinder C（28.3）'s
B1 mouthfuls of rodless cavity is connected, diffluence motor B（27.2）P2 mouths and clutch driving hydraulic cylinder D（28.4）B2 mouthfuls of phases of rodless cavity
Connection, the Solenoid ball valve C（23）A mouths and Solenoid ball valve B（22）P1 mouths, Solenoid ball valve B（22）P3 mouths be connected, institute
State Solenoid ball valve A（21）P2 mouths, Solenoid ball valve B（22）P2 mouths, pressure switch A（30.1）Oil inlet and brake B
（17.2）Oil inlet be connected, the Solenoid ball valve A（21）P4 mouths, Solenoid ball valve B（22）P4 mouths, pressure switch B
（30.2）Oil inlet and brake A（17.1）Oil inlet be connected, the travel switch A（29.1）With travel switch B
（29.2）It is arranged on clutch A（31.1）The extreme position of left and right two on straight-line trajectory, the travel switch C（29.3）
With travel switch D（29.4）It is arranged on clutch B（31.2）The extreme position of left and right two on straight-line trajectory.
2. the hydraulic control system according to claim 1 for the double drive devices at a slow speed of large-sized grinder, it is characterized in that：Institute
State transfer tube（2）, controlling pump（19）Motor, proportion electro-magnet and stroking mechanism（4）Magnetic valve, pressure sensor A
（14.1）, pressure sensor B（14.2）, pressure sensor C（14.3）, pressure sensor D（14.4）, electromagnetic relief valve（20）、
Solenoid ball valve A（21）, Solenoid ball valve B（22）, Solenoid ball valve C（23）, solenoid directional control valve A（24.1）, solenoid directional control valve B
（24.2）, travel switch A（29.1）, travel switch B（29.2）, travel switch C（29.3）, travel switch D（29.4）, pressure
Switch A（30.1）, pressure switch B（30.2）Control is respectively connected to together with for measuring the photoelectric encoder of grinding mill barrel rotating speed
Device.
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| CN108227756A (en) * | 2018-01-23 | 2018-06-29 | 南京科远自动化集团股份有限公司 | A kind of high-precision valve door control method |
| CN108654791A (en) * | 2018-06-27 | 2018-10-16 | 江阴双马重工装备有限公司 | A kind of ladle precrushing mechanism |
| CN108654789A (en) * | 2018-06-27 | 2018-10-16 | 江阴双马重工装备有限公司 | A kind of ladle prebreaker hydraulic control system |
| CN108654790A (en) * | 2018-06-27 | 2018-10-16 | 江阴双马重工装备有限公司 | A kind of ladle prebreaker |
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| CN110758094A (en) * | 2019-10-30 | 2020-02-07 | 南通威而多专用汽车制造有限公司 | Hydraulic system for engineering machinery walking and working method thereof |
| CN110758094B (en) * | 2019-10-30 | 2024-04-26 | 南通威而多专用汽车制造有限公司 | Hydraulic system for engineering machinery walking and working method thereof |
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