CN113582080A - Straddle type monorail wheel changing system dismounting platform and lifting hydraulic system - Google Patents

Straddle type monorail wheel changing system dismounting platform and lifting hydraulic system Download PDF

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Publication number
CN113582080A
CN113582080A CN202110885127.6A CN202110885127A CN113582080A CN 113582080 A CN113582080 A CN 113582080A CN 202110885127 A CN202110885127 A CN 202110885127A CN 113582080 A CN113582080 A CN 113582080A
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China
Prior art keywords
oil
valve
main
cylinder
auxiliary
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CN202110885127.6A
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Chinese (zh)
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CN113582080B (en
Inventor
刘伟
廖金军
吴�荣
胡骞
徐文强
李鹏鹏
吕振祥
范富君
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China Railway Construction Heavy Industry Group Co Ltd
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China Railway Construction Heavy Industry Group Co Ltd
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Priority to CN202110885127.6A priority Critical patent/CN113582080B/en
Publication of CN113582080A publication Critical patent/CN113582080A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/10—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks
    • B66F7/16—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks
    • B66F7/20—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported directly by jacks by one or more hydraulic or pneumatic jacks by several jacks with means for maintaining the platforms horizontal during movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
    • 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
    • F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
    • 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
    • F15B11/22—Synchronisation of the movement of 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
    • 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
    • F15B13/027—Check valves
    • 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
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F15B2013/0448—Actuation by solenoid and permanent magnet
    • 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
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The invention discloses a straddle type monorail wheel changing system dismounting platform and a lifting hydraulic system. The lifting hydraulic system comprises a settlement beam, a hydraulic control system and at least two oil cylinders, wherein one of the oil cylinders is a driving oil cylinder, and the other oil cylinders are auxiliary oil cylinders; a main cylinder piston rod of the driving oil cylinder and an auxiliary cylinder piston rod of the auxiliary oil cylinder move up and down, and the top ends of the main cylinder piston rod and the auxiliary cylinder piston rod are connected to the bottom surface of the settlement beam simultaneously; the hydraulic control system comprises an oil supply assembly, the oil supply assembly is provided with a main oil supply port, an auxiliary oil supply port and a proportional overflow valve, a driving oil cylinder is connected to the main oil supply port, the proportional overflow valve is connected to the main oil supply port, and an auxiliary oil cylinder is connected to the auxiliary oil supply port; the main cylinder piston rod can drive the settlement beam to lift, and drives the auxiliary oil cylinder to lift synchronously through the settlement beam. The driving oil cylinder plays a main supporting and driving role, and the auxiliary oil cylinder plays a guiding and unbalance loading resisting role. Because a single driving oil cylinder is adopted, the control mode is simple.

Description

Straddle type monorail wheel changing system dismounting platform and lifting hydraulic system
Technical Field
The invention relates to the technical field of vehicle engineering, in particular to a straddle type monorail wheel changing system dismounting platform and a lifting hydraulic system.
Background
A straddle type monorail wheel changing system belongs to vehicle section process equipment and is an important tool for vehicle maintenance. The bogie is a core component of the monorail vehicle and is different from a steel rail wheel set, and the tires of the monorail bogie need to be overhauled and replaced due to serious abrasion, so that a special wheel replacing warehouse is arranged on a vehicle section of the monorail train to replace the tires.
The disassembly and assembly platform is an important component of the straddle type monorail wheel changing system and is used for lifting a settlement beam, moving a bogie or other components and maintaining the bogie or other components. In the prior art, the settlement beam is connected to a plurality of oil cylinders, and the oil cylinders are respectively used as driving oil cylinders to be controlled so as to synchronously drive the settlement beam to lift, so that the control difficulty is relatively high.
Therefore, how to more simply realize the lifting control of the settlement beam is a technical problem which needs to be solved by the technical personnel in the field at present.
Disclosure of Invention
In view of the above, the present invention provides a hydraulic lifting system, which can more easily control the lifting of a sinker beam. Another object of the invention is to provide a straddle type monorail wheel-changing system dismounting platform comprising the hydraulic lifting system, which can more simply realize lifting control of a settlement beam.
In order to achieve the purpose, the invention provides the following technical scheme:
a lifting hydraulic system comprises a settlement beam, a hydraulic control system and at least two oil cylinders, wherein one of the oil cylinders is a driving oil cylinder, and the other oil cylinders are auxiliary oil cylinders;
a main cylinder piston rod of the driving oil cylinder and an auxiliary cylinder piston rod of the auxiliary oil cylinder move up and down, and the top ends of the main cylinder piston rod and the auxiliary cylinder piston rod are connected to the bottom surface of the settlement beam simultaneously;
the hydraulic control system comprises an oil supply assembly, wherein the oil supply assembly is provided with a main oil supply port, an auxiliary oil supply port and a proportional overflow valve;
the main cylinder piston rod can drive the settlement beam to lift, and the auxiliary oil cylinder is driven to lift synchronously through the settlement beam.
Preferably, the oil supply assembly further comprises an oil tank, a main motor, a main oil pump and a main check valve;
the main oil pump is connected with the main motor, an oil suction port of the main oil pump is connected with the oil tank, an outlet of the main oil pump is connected with an inlet of the main one-way valve, an outlet of the main one-way valve forms the main oil supply port, and the proportional overflow valve is connected between the outlet of the main one-way valve and the oil tank.
Preferably, the oil supply assembly further comprises an oil supplementing motor, an oil supplementing pump, an oil supplementing check valve and a manual overflow valve;
the oil supplementing pump is connected with the oil supplementing motor, an oil suction port of the oil supplementing pump is connected with the oil tank, an outlet of the oil supplementing pump is connected with an inlet of the oil supplementing one-way valve, an outlet of the oil supplementing one-way valve forms the auxiliary oil supply port, and the manual overflow valve is connected between an outlet of the oil supplementing one-way valve and the oil tank.
Preferably, the outlet of the main check valve is further connected with a pressure reducing valve, and the outlet of the pressure reducing valve forms the auxiliary oil supply port.
Preferably, the hydraulic control system further comprises a main electromagnetic directional valve, a main valve inlet of the main electromagnetic directional valve is connected to the main oil supply port, a main valve first outlet of the main electromagnetic directional valve is connected to a main cylinder rodless cavity inlet of the main oil cylinder, and a main valve second outlet of the main electromagnetic directional valve is connected to a main cylinder rod cavity inlet of the main oil cylinder; the main electromagnetic directional valve can switch one of the main valve first outlet, the main valve second outlet and the main valve oil return port of the main electromagnetic directional valve to be communicated with the main valve inlet.
Preferably, the hydraulic control system further comprises an oil supplementing electromagnetic directional valve, an oil supplementing valve inlet of the oil supplementing electromagnetic directional valve is connected to the auxiliary oil supply port, a first oil supplementing valve outlet of the oil supplementing electromagnetic directional valve is connected to an auxiliary cylinder rodless cavity inlet of the auxiliary oil cylinder, and a second oil supplementing valve outlet of the oil supplementing electromagnetic directional valve is connected to an auxiliary cylinder rod cavity inlet of the auxiliary oil cylinder; the oil supplementing electromagnetic directional valve can switch one of the first outlet of the oil supplementing valve, the second outlet of the oil supplementing valve and the oil supplementing valve oil return port of the oil supplementing electromagnetic directional valve to be communicated with the inlet of the oil supplementing valve.
Preferably, the hydraulic control system further comprises a main balance valve and an oil compensation balance valve;
the inlet of the main cylinder rodless cavity is connected to the first outlet of the main valve through the main balance valve, and the inlet of the auxiliary cylinder rodless cavity is connected to the first outlet of the oil supplementing valve through the oil supplementing balance valve;
and the control ports of the main balance valve and the oil supplementing balance valve are connected to the second outlet of the main valve.
Preferably, the number of the auxiliary oil cylinders is at least two.
Preferably, the two auxiliary oil cylinders are respectively arranged on two sides of the driving oil cylinder.
A straddle type monorail wheel-changing system dismounting platform comprises an ascending and descending hydraulic system.
The invention provides a lifting hydraulic system, which comprises a settlement beam, a hydraulic control system and at least two oil cylinders, wherein one of the oil cylinders is a driving oil cylinder, and the other oil cylinders are auxiliary oil cylinders; a main cylinder piston rod of the driving oil cylinder and an auxiliary cylinder piston rod of the auxiliary oil cylinder move up and down, and the top ends of the main cylinder piston rod and the auxiliary cylinder piston rod are connected to the bottom surface of the settlement beam simultaneously; the hydraulic control system comprises an oil supply assembly, the oil supply assembly is provided with a main oil supply port, an auxiliary oil supply port and a proportional overflow valve, a driving oil cylinder is connected to the main oil supply port, the proportional overflow valve is arranged on the inlet side of the main oil supply port, and an auxiliary oil cylinder is connected to the auxiliary oil supply port; the main cylinder piston rod can drive the settlement beam to lift, and drives the auxiliary oil cylinder to lift synchronously through the settlement beam.
The auxiliary oil cylinder and the single driving oil cylinder are connected to the bottom of the settlement beam at the same time, the driving oil cylinder can provide supporting force according to the load of the settlement beam through the control of the proportional overflow valve, the main supporting and driving effect is achieved, the auxiliary oil cylinder can be driven by the settlement beam to move up and down, the guiding and unbalance loading resisting effects are achieved, the settlement beam can stably ascend and descend, and the stability can be kept when a train passes through the settlement beam and causes unbalance loading. Because a single driving oil cylinder is adopted, the control mode is simple, the cost can be saved, the throttling loss of the system caused by synchronous control of a plurality of driving oil cylinders is avoided, and the heating of the system is reduced.
The straddle type monorail wheel changing system dismounting platform comprising the lifting hydraulic system can more simply realize lifting control on the settlement beam.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a diagram of a first embodiment of a lift hydraulic system according to the present invention;
FIG. 2 is a diagram of a hydraulic control circuit according to a first embodiment of the present invention;
fig. 3 is a diagram of a hydraulic control oil circuit of a second embodiment of the hydraulic lifting system provided by the present invention.
Reference numerals:
a main motor 1;
a main oil pump 2;
a main check valve 3;
a proportional overflow valve 4;
a main electromagnetic directional valve 5, a main valve first solenoid B1, a main valve second solenoid a1, a main valve first outlet a1, a main valve second outlet B1, a main valve inlet P1, a main valve return T1;
an oil-supplementing motor 6;
an oil replenishment pump 7;
an oil-supplementing one-way valve 8;
a manual overflow valve 9;
the oil supplementing electromagnetic reversing valve 10, the oil supplementing valve first electromagnet B2, the oil supplementing valve second electromagnet a2, an oil supplementing valve first outlet A2, an oil supplementing valve second outlet B2, an oil supplementing valve inlet P2 and an oil supplementing valve oil return opening T2;
the oil compensating balance valve 11, a control port x 1;
main balancing valve 12, control port x 2;
the auxiliary oil cylinder 14, an auxiliary cylinder piston rod 141, an auxiliary cylinder rod cavity inlet B4 and an auxiliary cylinder rodless cavity inlet A4;
the main cylinder 15, the main cylinder piston rod 151, the main cylinder rod cavity inlet B3, the main cylinder rod-free cavity inlet A3;
a pressure reducing valve 16;
a settlement beam 17;
a main oil supply port C;
and an auxiliary oil supply port D.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide a lifting hydraulic system which can more simply realize the lifting control of the settlement beam. Another core of the invention is to provide a straddle type monorail wheel-changing system dismounting platform comprising the lifting hydraulic system, which can more simply realize lifting control on a settlement beam.
Referring to fig. 1 and 2, the first embodiment of the lifting hydraulic system provided by the invention is applied to a straddle-type monorail wheel changing system dismounting platform. In other embodiments, the lifting device can be applied to a dismounting platform or a device needing to be lifted.
The hydraulic lifting system comprises a settlement beam 17, a hydraulic control system and at least two oil cylinders. One of the cylinders is a driving cylinder 15, and the other cylinders are auxiliary cylinders 14.
A master cylinder 15, an auxiliary cylinder 14 and a hydraulic control system. The main cylinder piston rod 151 of the master cylinder 15 and the auxiliary piston rod of the auxiliary cylinder 14 move up and down and the top ends are connected to the bottom surface of the settlement beam 17.
The hydraulic control system includes an oil supply assembly. The oil supply assembly is provided with a main oil supply port C, an auxiliary oil supply port D and a proportional overflow valve 4. The driving oil cylinder 15 is connected to the main oil supply port C, and the proportional overflow valve 4 is connected to the main oil supply port C, specifically, between the main oil supply port C and the oil tank. The auxiliary cylinder 14 is connected to the auxiliary oil supply port D. The proportional relief valve 4 is set according to the pressure obtained by load calculation, so that the driving oil cylinder 15 provides required supporting force for the settlement beam 17 according to the requirement.
The main cylinder piston rod 151 can drive the settlement beam 17 to lift, and drive the auxiliary cylinder 14 to lift synchronously through the settlement beam 17.
In this embodiment, the auxiliary oil cylinder 14 and the single driving oil cylinder 15 are connected to the bottom of the settlement beam 17 at the same time, and by the control of the proportional overflow valve 4, the driving oil cylinder 15 can provide a supporting force according to the load of the settlement beam 17 to play a main supporting and driving role, and the auxiliary oil cylinder 14 can be driven by the settlement beam 17 to move up and down to play a role in guiding and resisting unbalance loading, so that the settlement beam 17 can stably ascend and descend, and can also be kept stable when the train passes through the settlement beam to cause unbalance loading. Because the single driving oil cylinder 15 is adopted, the control mode is simple, the cost can be saved, the throttling loss of the system caused by the synchronous control of a plurality of driving oil cylinders is avoided, and the heating of the system is reduced.
Further, the oil supply unit includes an oil tank, a main motor 1, a main oil pump 2, and a main check valve 3, and can stably supply oil to the master cylinder 15. Specifically, the main oil pump 2 is a fixed displacement pump. The main oil pump 2 is connected to the main motor 1, and both are rigidly connected. The suction port S of the main oil pump 2 is connected to the tank and the outlet P is connected to the inlet P3 of the main check valve 3, and the outlet T3 of the main check valve 3 constitutes a main oil supply port C. The inlet P4 of the proportional relief valve 4 is connected to the outlet T3 of the main check valve 3, and the outlet T4 of the proportional relief valve 4 is connected to the tank.
Further, the oil supply assembly further comprises an oil supply motor 6, an oil supply pump 7, an oil supply one-way valve 8 and a manual overflow valve 9, and oil can be stably supplied to the auxiliary oil cylinder 14. Specifically, the set pressure of the manual overflow valve 9 is less than 5MPa, for example, about 2MPa, to overcome the pressure loss of the pipeline. The oil supply pump 7 is connected with the oil supply motor 6, and the two are rigidly connected. The oil suction port S1 of the oil replenishment pump 7 is connected to the oil tank and the outlet P7 is connected to the inlet P5 of the oil replenishment check valve 8, the outlet T5 of the oil replenishment check valve 8 constitutes an auxiliary oil supply port D, the inlet P6 of the manual relief valve 9 is connected to the outlet T5 of the oil replenishment check valve 8, and the outlet T6 is connected to the oil tank.
Further, the hydraulic control system also includes a main electromagnetic directional valve 5. The main valve inlet P1 of the main electromagnetic directional valve 5 is connected to the main oil supply port C, the main valve first outlet A1 of the main electromagnetic directional valve 5 is connected to the main cylinder rodless cavity inlet A3 of the driving oil cylinder 15, the main valve second outlet B1 of the main electromagnetic directional valve 5 is connected to the main cylinder rod cavity inlet B3 of the driving oil cylinder 15, one of the main valve first outlet A1, the main valve second outlet B1 and the main valve return port T1 of the main electromagnetic directional valve 5 can be switched by the main electromagnetic directional valve 5 to be communicated with the main valve inlet P1, and the main valve return port T1 is connected to the oil tank. By the arrangement of the main electromagnetic directional valve 5, the lifting control of the main cylinder piston rod 151 can be easily realized by the oil supply of the main oil supply port C.
As shown in fig. 2 in particular, the main electromagnetic directional valve 5 includes a main valve first solenoid b1 and a main valve second solenoid a 1. The first electromagnet b1 of the main valve is electrified, the first outlet A1 of the main valve is communicated with the inlet P1 of the main valve, and oil enters the rodless cavity of the main cylinder of the driving oil cylinder 15 through the inlet A3 of the rodless cavity of the main cylinder of the driving oil cylinder 15, so that the piston rod 151 of the main cylinder rises. The second electromagnet a1 of the main valve is powered, the second outlet B1 of the main valve is communicated with the inlet P1 of the main valve, and the oil enters the rod cavity of the main cylinder of the active oil cylinder 15 through the inlet B3 of the rod cavity of the main cylinder of the active oil cylinder 15, so that the piston rod 151 of the main cylinder descends. The main valve first electromagnet b1 and the main valve second electromagnet a1 are both de-energized, the oil passage between the main oil supply port C and the driving oil cylinder 15 is cut off, and the main valve inlet P1 is communicated with the oil tank through the main valve oil return port T1.
Further, the hydraulic control system also comprises an oil-supplementing electromagnetic directional valve 10. An inlet P2 of an oil filling valve of the oil filling electromagnetic directional valve 10 is connected with an auxiliary oil supply port D, a first outlet A2 of the oil filling valve of the oil filling electromagnetic directional valve 10 is connected with an inlet A4 of an auxiliary cylinder rodless cavity of the auxiliary oil cylinder 14, and a second outlet B2 of the oil filling valve of the oil filling electromagnetic directional valve 10 is connected with an inlet B4 of an auxiliary cylinder rod cavity of the auxiliary oil cylinder 14. One of the first outlet A2 of the switchable oil supplementing valve of the auxiliary electromagnetic directional valve, the second outlet B2 of the oil supplementing valve and the oil supplementing valve oil return port T2 of the oil supplementing electromagnetic directional valve 10 is communicated with an inlet P2 of the oil supplementing valve, and the oil supplementing valve oil return port T2 is connected with an oil tank. By the arrangement of the oil-supplying electromagnetic directional valve 10, the lifting control of the auxiliary cylinder piston rod 141 can be conveniently realized by supplying oil through the auxiliary oil supply port D.
Specifically, as shown in fig. 2, the oil replenishment electromagnetic directional valve 10 includes an oil replenishment valve first solenoid b2 and an oil replenishment valve second solenoid a 2. The first electromagnet b2 of the oil supplementing valve is electrified, the first outlet A2 of the oil supplementing valve is communicated with the inlet P2 of the oil supplementing valve, and oil enters the rodless cavity of the auxiliary cylinder 14 through the inlet A4 of the rodless cavity of the auxiliary cylinder 14, so that the piston rod 141 of the auxiliary cylinder rises. The second electromagnet a2 of the oil supplementing valve is electrified, the second outlet B2 of the oil supplementing valve is communicated with the inlet P2 of the oil supplementing valve, and oil enters the rod cavity of the auxiliary cylinder 14 through the inlet B4 of the rod cavity of the auxiliary cylinder 14, so that the piston rod 141 of the auxiliary cylinder descends. The first electromagnet b2 of the oil supplementing valve and the second electromagnet a2 of the oil supplementing valve are both de-energized, an oil passage between the main oil supply port C and the auxiliary oil cylinder 14 is disconnected, and the inlet P2 of the oil supplementing valve is communicated with an oil tank through the oil return port T2 of the oil supplementing valve.
Further, the hydraulic control system further includes a main balance valve 12 and an oil compensation balance valve 11. The master cylinder rodless chamber inlet A3 is connected to the master valve first outlet A1 through the master balancing valve 12. The auxiliary cylinder rodless chamber inlet a4 is connected to the oil replenishment valve first outlet a2 through the oil replenishment balance valve 11. The control port x2 of the main balance valve 12 and the control port x1 of the oil compensating balance valve 11 are both connected to the main valve second outlet B1, so that the unified control of the balance valves is realized.
Further, the number of the auxiliary cylinders 14 is at least two. Preferably, two auxiliary cylinders 14 are provided at both sides of one master cylinder 15, respectively. In other embodiments, the auxiliary cylinders 14 may be provided in other numbers. The cylinder end covers of the auxiliary oil cylinder 14 and the driving oil cylinder 15 are fixed, the top end of the main cylinder piston rod 151 is fixed on the settlement beam 17 through a large flange, the top end of the auxiliary cylinder piston rod 141 is connected with the settlement beam 17 through a small flange or a pin shaft, and specifically, the area of the flange is larger than that of the piston rod directly connected with the flange, so that the contact area between the piston rod and the settlement beam 17 is increased, the support stability is improved, and the pressure is reduced.
When the lifting hydraulic system in the embodiment is applied to controlling the lifting of the dismounting platform, the driving oil cylinder 15 actively lifts to provide push-pull force for the settlement beam 17, the two auxiliary oil cylinders 14 are driven oil cylinders and passively extend and retract to play a supporting and guiding role, so that the stable lifting and load keeping of the platform are realized, and the working principle is as follows:
the pressure of the manual overflow valve 9 is set to be about 2MPa so as to overcome the pressure loss of the pipeline. When the proportional pressure regulating valve is used, the system pressure is set firstly, and the proportional pressure regulating valve 4 is set according to the pressure obtained by load calculation. When the platform is disassembled and assembled and needs to be started to lift, the oil supplementing electromagnetic directional valve 10 is powered firstly, and the main electromagnetic directional valve 5 is powered in a delayed mode, so that the auxiliary cylinder piston rod 141 can move when the main cylinder piston rod 151 moves.
(II) when the dismounting platform is not operated:
the main motor 1 is started by electricity to drive the main oil pump 2 to rotate, the main oil pump 2 sucks oil from an oil tank through an oil suction port S, pressure oil enters a main valve inlet P1 of the main electromagnetic directional valve 5 and an inlet of the proportional overflow valve 4 from an outlet P of the main oil pump 2 through the main check valve 3, and returns to the oil tank through a main valve inlet P1 and a main valve oil return port T1 in the main electromagnetic directional valve 5, and at the moment, the output pressure of the main oil pump 2 depends on the pressure loss of an oil return tank.
The oil supplementing motor 6 is started by power to drive the oil supplementing pump 7 to rotate, the oil supplementing pump 7 absorbs oil from the oil tank through an oil suction port S1, pressure oil enters an oil supplementing valve inlet P2 of the oil supplementing electromagnetic directional valve 10 and an inlet P6 of the manual overflow valve 9 from an outlet P7 of the oil supplementing pump 7 through the oil supplementing one-way valve 8, and returns to the oil tank through an oil supplementing valve inlet P2 and an oil supplementing valve oil return port T2 in the oil supplementing electromagnetic directional valve 10, and at the moment, the output pressure of the oil supplementing pump 7 depends on the pressure loss of the oil return tank.
(III) when the dismounting platform is lifted:
the first electromagnet B1 of the main valve is electrified, the first electromagnet B2 of the oil supplementing valve is electrified, the inlet A3 of the main cylinder rodless cavity of the driving oil cylinder 15 is an inlet, the inlet B3 of the main cylinder rod cavity is an outlet, the inlet A4 of the auxiliary cylinder rodless cavity of the auxiliary oil cylinder 14 is an inlet, and the inlet B4 of the auxiliary cylinder rod cavity is an outlet. The path of pressure oil of the driving oil cylinder 15 is P-P3-T3-P1-A1-P9-T8-A3, and the path of low-pressure oil return is B3-B1-T1. The pressure oil path of the auxiliary oil cylinder 14 is P7-P5-T5-P2-A2-P11-T10-A4, and the low-pressure oil return path is B4-B2-T2.
In the ascending process, the driving oil cylinder 15 extends out to provide main thrust to push the settlement beam 17 upwards and drive the auxiliary oil cylinder 14 and the auxiliary cylinder piston rod 141 to extend out, and because the three oil cylinder end covers and the top of the piston rod are respectively fixed, the auxiliary oil cylinder 14 can be pulled, but the auxiliary oil cylinder can play a role in guiding the settlement beam. Because the thrust is provided by one driving oil cylinder 15, the phenomenon that the settlement beam 17 inclines due to asynchronous control of a plurality of oil cylinders 15 in other embodiments does not occur, and the stable rising of the dismounting platform can be realized.
When the dismounting platform rises to be level with the track, the first electromagnet b1 of the main valve is powered off, the first electromagnet b2 of the oil supplementing valve is powered off, the oil supplementing electromagnetic directional valve 10 and the main electromagnetic directional valve 5 return to the middle position, and the rear motor stops. When a train passes through the settlement beam 17, the pressure is kept by the balance valve, and the supporting force is provided. When a train passes through the settlement beam 17, the loads borne by each point of the bearing surface borne by the settlement beam 17 are different, but the auxiliary oil cylinders 14 are symmetrically distributed, and the settlement beam 17 is provided with three supporting points, so that the influence of unbalance loading can be reduced to the minimum.
(IV) when the train needs to change wheels or other parts, the dismounting platform needs to descend:
the second electromagnet a1 of the main valve is electrified, the second electromagnet a2 of the oil supplementing valve is electrified, the inlet B3 of the main cylinder rod cavity of the driving oil cylinder 15 is an inlet, the inlet A3 of the main cylinder rodless cavity is an outlet, the inlet B4 of the auxiliary cylinder rod cavity of the auxiliary oil cylinder 14 is an inlet, and the inlet A4 of the auxiliary cylinder rodless cavity is an outlet. The path of pressure oil of the driving oil cylinder 15 is P-P3-T3-P1-B1-B3/x1/x2, control ports x1 and x2 of three balance valves are connected with high-pressure oil, the three balance valves are opened, and the path of low-pressure oil return is A3-T7-P8-A1-T1. A pressure oil path P7-P5-T5-P2-B2-B4 of the auxiliary oil cylinder 14, and a low-pressure oil return path is A4-T9-P10-A2-T2.
During the descending process, the driving oil cylinder 15 extends out to provide pulling force, the settlement beam 17 moves downwards, and meanwhile, the auxiliary oil cylinder 14 is driven to retract, and as the three oil cylinder end covers and the top end of the piston rod are fixed, the auxiliary oil cylinder 14 can play a guiding role although being pulled. Because the pulling force is provided by one oil cylinder, the phenomenon that the settlement beam 17 inclines due to asynchronous control of the oil cylinders 15 in other embodiments can be avoided, and the stable descending of the dismounting platform can be realized.
According to the lifting hydraulic system, the single driving oil cylinder 15 is matched with the two auxiliary oil cylinders 14, the driving oil cylinder 15 is connected with the auxiliary oil cylinders 14 in parallel, the driving oil cylinder 15 drives the auxiliary oil cylinders 14 to ascend and descend, stable lifting of a platform can be achieved, the problem that the requirement on the synchronous performance of the platform lifting oil cylinders is high is solved, the phenomenon that the platform is clamped due to asynchronous control caused by the fact that the plurality of driving oil cylinders are arranged is avoided, and the two auxiliary oil cylinders 14 and the balance valve can keep the platform stable when the platform is subjected to an offset load; meanwhile, the control mode is simple, so that the cost is saved, the throttling loss of the system caused by synchronous control is avoided, and the heating of the system is greatly reduced.
In the second embodiment of the hydraulic lifting system provided by the present invention, instead of using the oil supply pump 7 and the oil supply motor 6 to supply oil to the auxiliary cylinder 14, the outlet of the main check valve 3 may be connected to the pressure reducing valve 16, and the outlet of the pressure reducing valve 16 forms the auxiliary oil supply port D, as shown in fig. 3, the outlet of the pressure reducing valve 16 is connected to the oil supply valve inlet P2 of the oil supply electromagnetic directional valve 10. The auxiliary oil cylinder 14 is replenished with the main oil pump 2, and the pressure can be reduced by the pressure reducing valve 16 without affecting the extension and retraction of the main oil cylinder 15.
In addition to the lifting hydraulic system, the invention also provides a straddle type monorail wheel changing system dismounting platform, which comprises the lifting hydraulic system, specifically the lifting hydraulic system provided in any one of the above embodiments, and the beneficial effects can be correspondingly referred to the above embodiments. The structure of other parts of the dismounting platform of the straddle-type monorail wheel-changing system refers to the prior art, and is not described herein again.
It will be understood that when an element is referred to as being "secured" to another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the invention and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The disassembly and assembly platform and the lifting hydraulic system of the straddle type monorail wheel changing system provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.

Claims (10)

1. A lifting hydraulic system is characterized by comprising a settlement beam (17), a hydraulic control system and at least two oil cylinders, wherein one of the oil cylinders is a driving oil cylinder (15), and the other oil cylinders are auxiliary oil cylinders (14);
a main cylinder piston rod (151) of the driving oil cylinder (15) and an auxiliary cylinder piston rod (141) of the auxiliary oil cylinder (14) move up and down, and the top ends of the main cylinder piston rod and the auxiliary cylinder piston rod are connected to the bottom surface of the settlement beam (17) at the same time;
the hydraulic control system comprises an oil supply assembly, the oil supply assembly is provided with a main oil supply port (C), an auxiliary oil supply port (D) and a proportional overflow valve (4), the driving oil cylinder (15) is connected to the main oil supply port (C), the proportional overflow valve (4) is connected to the main oil supply port (C), and the auxiliary oil cylinder (14) is connected to the auxiliary oil supply port (D);
the main cylinder piston rod (151) can drive the settlement beam (17) to lift, and the auxiliary oil cylinder (14) is driven to lift synchronously through the settlement beam (17).
2. The hydraulic lift system according to claim 1, characterized in that the oil supply assembly further comprises an oil tank, a main motor (1), a main oil pump (2) and a main check valve (3);
the main oil pump (2) is connected to the main motor (1), an oil suction port of the main oil pump (2) is connected to the oil tank, an outlet of the main oil pump is connected to an inlet of the main check valve (3), an outlet of the main check valve (3) forms the main oil supply port (C), and the proportional overflow valve (4) is connected between an outlet of the main check valve (3) and the oil tank.
3. The hydraulic lifting system as recited in claim 2, characterized in that the oil supply assembly further comprises an oil supply motor (6), an oil supply pump (7), an oil supply check valve (8) and a manual overflow valve (9);
the oil supplementing pump (7) is connected with the oil supplementing motor (6), an oil suction port of the oil supplementing pump (7) is connected with the oil tank, an outlet of the oil supplementing check valve (8) is connected with an inlet of the oil supplementing check valve (8), an outlet of the oil supplementing check valve (8) forms the auxiliary oil supply port (D), and the manual overflow valve (9) is connected with an outlet of the oil supplementing check valve (8) and the oil tank.
4. The lift hydraulic system according to claim 2, characterized in that the outlet of the main non return valve (3) is also connected to a pressure reducing valve (16), the outlet of the pressure reducing valve (16) constituting the auxiliary oil supply port (D).
5. The lift hydraulic system according to any one of claims 1 to 4, characterized in that the hydraulic control system further comprises a main electromagnetic directional valve (5), the main valve inlet (P1) of the main electromagnetic directional valve (5) being connected to the main oil supply port (C), the main valve first outlet (A1) of the main electromagnetic directional valve (5) being connected to the master rodless chamber inlet (A3) of the master cylinder (15), the main valve second outlet (B1) of the main electromagnetic directional valve (5) being connected to the master rod chamber inlet (B3) of the master cylinder (15); the main electromagnetic directional valve (5) can switch one of the main valve first outlet (A1), the main valve second outlet (B1) and a main valve return port (T1) of the main electromagnetic directional valve (5) to be communicated with the main valve inlet (P1).
6. The lift hydraulic system of claim 5, further comprising an oil replenishment solenoid directional valve (10), the oil replenishment valve inlet (P2) of the oil replenishment solenoid directional valve (10) being connected to the auxiliary oil supply port (D), the oil replenishment valve first outlet (A2) of the oil replenishment solenoid directional valve (10) being connected to the auxiliary cylinder rodless cavity inlet (A4) of the auxiliary cylinder (14), the oil replenishment valve second outlet (B2) of the oil replenishment solenoid directional valve (10) being connected to the auxiliary cylinder rod cavity inlet (B4) of the auxiliary cylinder (14); the oil supplementing electromagnetic directional valve (10) is capable of switching one of an oil supplementing valve first outlet (A2), an oil supplementing valve second outlet (B2) and an oil supplementing valve oil return port (T2) of the oil supplementing electromagnetic directional valve (10) to be communicated with an oil supplementing valve inlet (P2).
7. A lifting hydraulic system according to claim 6, characterized in that the hydraulic control system further comprises a main balancing valve (12) and an oil compensating balancing valve (11);
the master cylinder rodless chamber inlet (A3) is connected to the master valve first outlet (A1) through the master balancing valve (12), and the slave cylinder rodless chamber inlet (A4) is connected to the oil replenishment valve first outlet (A2) through the oil replenishment balancing valve (11);
the control ports of the main balance valve (12) and the oil supplementing balance valve (11) are connected to the second outlet (B1) of the main valve.
8. A hoist hydraulic system according to any one of claims 1 to 4, characterized in that the auxiliary cylinders (14) are at least two.
9. A hydraulic lifting system according to claim 8, characterized in that two said auxiliary cylinders (14) are provided on either side of the master cylinder (15).
10. A straddle-type monorail wheel-changing system dismounting platform, which is characterized by comprising the lifting hydraulic system of any one of claims 1 to 9.
CN202110885127.6A 2021-08-03 2021-08-03 Straddle type monorail wheel changing system dismounting platform and lifting hydraulic system Active CN113582080B (en)

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CN202110885127.6A CN113582080B (en) 2021-08-03 2021-08-03 Straddle type monorail wheel changing system dismounting platform and lifting hydraulic system

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CN202110885127.6A CN113582080B (en) 2021-08-03 2021-08-03 Straddle type monorail wheel changing system dismounting platform and lifting hydraulic system

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205190395U (en) * 2015-11-25 2016-04-27 上海电气液压气动有限公司 Hydraulic cylinder high -precision synchronization control integrated equipment of super large jumbo
CN106812747A (en) * 2015-12-01 2017-06-09 史树元 A kind of single track vehicles change wheel platform hydraulic control system
CN111960325A (en) * 2020-08-27 2020-11-20 吉特利环保科技（厦门）有限公司 Large-scale lifting platform

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205190395U (en) * 2015-11-25 2016-04-27 上海电气液压气动有限公司 Hydraulic cylinder high -precision synchronization control integrated equipment of super large jumbo
CN106812747A (en) * 2015-12-01 2017-06-09 史树元 A kind of single track vehicles change wheel platform hydraulic control system
CN111960325A (en) * 2020-08-27 2020-11-20 吉特利环保科技（厦门）有限公司 Large-scale lifting platform

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