CN110451422A - Heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder - Google Patents

Heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder Download PDF

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Publication number
CN110451422A
CN110451422A CN201910749312.5A CN201910749312A CN110451422A CN 110451422 A CN110451422 A CN 110451422A CN 201910749312 A CN201910749312 A CN 201910749312A CN 110451422 A CN110451422 A CN 110451422A
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China
Prior art keywords
cylinder
level
piston
stage
hole
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CN201910749312.5A
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CN110451422B (en
Inventor
张振华
王飞
李春萍
陈亮
杨凯强
曹秀荣
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Beijing Institute of Specialized Machinery
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Beijing Institute of Specialized Machinery
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F3/00Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/25Constructional features
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B66HOISTING; LIFTING; HAULING
    • B66FHOISTING, 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
    • B66F3/00Devices, e.g. jacks, adapted for uninterrupted lifting of loads
    • B66F3/24Devices, e.g. jacks, adapted for uninterrupted lifting of loads fluid-pressure operated
    • B66F3/43Pyrotechnical jacks
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1404Characterised by the construction of the motor unit of the straight-cylinder type in clusters, e.g. multiple cylinders in one block
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1428Cylinders
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • F15B15/1457Piston rods
    • F15B15/1461Piston rod sealings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/16Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
    • F15B15/165Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type with synchronisation of sections

Abstract

The present invention relates to a kind of heavily loaded lifting methods based on multistage composite telescopic hydraulic cylinder, are related to technical field of fluid transmission.The present invention can significantly improve the stretching speed of heavy duty multistage hydraulic cylinder by the matched design between Multi-stage cylinder, and the grade impact frequency is changed in reduction, solve the problems, such as that existing composite telescopic hydraulic cylinder processing and manufacturing is difficult, can not assemble, can not shift to an earlier date it is oil-filled;And the synchronous error generated in hydraulic cylinder reciprocating motion can be eliminated.

Description

Heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder
Technical field
The present invention relates to technical field of fluid transmission, and in particular to a kind of heavy duty act based on multistage composite telescopic hydraulic cylinder Lifting method.
Background technique
Hydraulic cylinder is reciprocating motion class executive component important in hydraulic system.Compared to single stage hydraulic cylinder, multi-stage expansion liquid Cylinder pressure has many advantages, such as that initial locating distance is shorter, stroke is longer, applies in the large-scale heavy duties such as dumper, crane lifting equipment Extensively.Currently, large-scale heavy duty lifting equipment mostly uses traditional plunger or piston-type multi-stage hydraulic cylinder, plungers or piston at different levels are needed It stretches out step by step, it is slower to stretch out speed.In addition, plungers at different levels or piston rod also need to change grade, hydraulic cylinder effective working face when changing grade Product change dramatically, causes system pressure and cylinder movement velocity to be mutated, and then collides and vibratory impulse, not only influences mechanical dress Standby functional reliability, has an effect on lifting working efficiency.For demands such as hydraulic elevator, high-altitude operation vehicles, occur again in recent years The multistage hydraulic cylinder of synchronization telescope, though such hydraulic cylinder have many advantages, such as movement velocity it is fast, there is no grade impact is changed, in heavy burden Under load effect, hydraulic cylinder appearance cavity pressure is higher, and the outer dimension of cylinder is larger, is not suitable for the limited heavy duty lifting of installation space Occasion.
Therefore, the heavily loaded Integral Lifting Scheme for how designing a kind of hydraulic cylinder becomes technical problem urgently to be resolved.
Summary of the invention
(1) technical problems to be solved
The technical problem to be solved by the present invention is how to design a kind of heavily loaded lifting method realized based on hydraulic cylinder.
(2) technical solution
The heavy duty lifting based on multistage composite telescopic hydraulic cylinder that in order to solve the above-mentioned technical problems, the present invention provides a kind of Method, this method realize that the multistage composite telescopic hydraulic cylinder is designed as, including cylinder based on a kind of multistage composite telescopic hydraulic cylinder Cylinder 1, first-stage cylinder 2, secondary cylinder 3, three-level cylinder 4, cylinder head 5, cylinder bottom 6;The cylinder barrel 1, first-stage cylinder 2, secondary cylinder 3 and three-level cylinder 4 by Successively nesting forms outside to inside;The cylinder barrel 1 is cylinder-like structure, and the piston rod portion realization of head end and first-stage cylinder 2 seals And support, the tail end outer rim of cylinder barrel 1 connect and seal with cylinder bottom 6;The head end of the piston rod portion of three-level cylinder 4 is connect with cylinder head 5 And it seals;
The first-stage cylinder 2 includes level-one cylinder barrel 2.1, first-stage cylinder guide sleeve 2.2, first-stage cylinder sealing ring 2.3, first-stage cylinder spiral shell Line baffle ring 2.4, bleed screw 2.5 and oil fill plug 2.6;The level-one cylinder barrel 2.1 is cylinder-like structure, first-stage cylinder guide sleeve 2.2 be flange disk-like structure, and first-stage cylinder screw thread baffle ring 2.4 is annular structure, the head end inner wall and level-one of level-one cylinder barrel 2.1 The outer rim of cylinder guide sleeve 2.2 is threadedly coupled and passes through the sealing of first-stage cylinder sealing ring 2.3, the cross section edge of first-stage cylinder guide sleeve 2.2 Through-hole there are two axially opening, and the bleed screw 2.5 and oil fill plug are installed respectively close to one end of flange in two through-holes 2.6, the inner wall of first-stage cylinder guide sleeve 2.2 is axial to be inwardly sequentially installed with the second dustband 15, the 4th lattice by described flange one end Lay circle 16, the 4th guide ring 17 simultaneously realize sealing and support with the piston rod portion of secondary cylinder 3;2.1 tail end of level-one cylinder barrel Outer rim is equipped with the first Glais ring 8, the first guide ring 9 and realizes sealing and support with 1 inner wall of cylinder barrel;2.1 tail of level-one cylinder barrel The inside at end and the outer rim of first-stage cylinder screw thread baffle ring 2.4 are connected through a screw thread fastening, and the piston rod of first-stage cylinder 2 is close to the portion of piston Divide and is radially provided with multiple through-holes;
The secondary cylinder 3 is living including second level cylinder barrel 3.1, secondary cylinder guide sleeve 3.2, secondary cylinder sealing ring 3.3, secondary cylinder Cock body 3.4, plug-in one-way valve 3.5 and oil guide pipe 3.6, the second level cylinder barrel 3.1 are cylinder-like structure, secondary cylinder guide sleeve 3.2 be flange disk-like structure, and secondary cylinder piston body 3.4 is cylindrical-shaped structure and is provided with annular groove at one end;Second level cylinder barrel 3.1 head end inner wall is threadedly coupled with the outer rim of secondary cylinder guide sleeve 3.2 and passes through the sealing of secondary cylinder sealing ring 3.3, secondary cylinder The inner wall of guide sleeve 3.2 is axially inwardly sequentially installed with third dustband 20, the 6th Glais ring 21, the 6th guide ring by flange end 22 and sealing and support are realized with the piston rod portion of three-level cylinder 4, the tail end of second level cylinder barrel 3.1 is provided with 4-8 connection second level The radial through-hole of 3 rodless cavity of cylinder and 4 rod chamber of three-level cylinder, outer rim and the secondary cylinder piston body 3.4 of 3.1 tail end of second level cylinder barrel The annular groove inner wall is connected through a screw thread fastening, and secondary cylinder piston body 3.4 is provided with blind hole, the Oil Guide along longitudinal center line One end of pipe 3.6 is protruded into the blind hole and is welded with secondary cylinder piston body 3.4 and fastens, from the ring of secondary cylinder piston body 3.4 Connected in star bottom, which is set out, opens up ladder hole along axial direction, and plug-in one-way valve 3.5, secondary cylinder are installed in the ladder hole The radial hole of connection first-stage cylinder 2 rod chamber and oil guide pipe 3.6, the outer rim edge of secondary cylinder piston body 3.4 are also provided in piston body 3.4 The two sides of the radial hole be separately installed with third Glais ring 13, third guide ring 14 and with 2 inner wall of first-stage cylinder realize sealing and Support, so that the oil liquid of the rodless cavity of the secondary cylinder 3 flows into the rodless cavity of three-level cylinder 4 by plug-in one-way valve 3.5, reversely Oil liquid can not circulate, and first-stage cylinder 2 is connected to close to the radial through-hole of piston portion with the radial hole in secondary cylinder piston body 3.4;
The outer rim of the three-level cylinder 4 is ladder shaft-like structure, and inside is provided with stepped hole, the work of three-level cylinder 4 along axial line The head end of rod portion is threadedly coupled with cylinder head 5 and is sealed by the second O-ring 23, the tail end of the piston rod portion of three-level cylinder 4 It is radially provided with 4-8 through-hole close to piston region, the outer rim of the piston portion of three-level cylinder 4 installs the 5th Glais ring the 18, the 5th Guide ring 19 simultaneously realizes sealing and support with the inner wall of secondary cylinder 3, and the inner hole of the piston portion of three-level cylinder 4 is equipped with the 7th lattice Lay Circle 25 and the 7th guide ring 26, the other end of the oil guide pipe 3.6 protrude into the inside of three-level cylinder 4 and by 25 Hes of the 7th Glais ring 7th guide ring 26 realizes sealing and support with three-level cylinder 4;
The rodless cavity hydraulic fluid port A being connected to the rodless cavity of the rodless cavity of first-stage cylinder 2, secondary cylinder 3, cylinder are provided on the cylinder bottom 6 The rodless cavity hydraulic fluid port B being connected to the stepped hole, the oil guide pipe 3.6 in three-level cylinder 4 is provided on first 5;
Heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder realization is the following steps are included: before use, beat Bleed screw 2.5 and oil fill plug 2.6 are opened, it is hydraulic to the injection of the rod chamber of secondary cylinder 3 from the hole of installation oil fill plug 2.6 Oil is discharged at the hole that the air in the rod chamber of secondary cylinder 3 passes through installation bleed screw 2.5, and the rod chamber of secondary cylinder 3 fills liquid It is installed again after pressure oil and tightens bleed screw 2.5 and oil fill plug 2.6;
When hydraulic cylinder needs overhanging, high pressure oil is squeezed into from rodless cavity hydraulic fluid port A to the rodless cavity of first-stage cylinder 2, high pressure oil drives Dynamic first-stage cylinder 2 is stretched out first, while the oil liquid of 2 rod chamber of first-stage cylinder is logical close to the radial direction of piston portion followed by first-stage cylinder 2 Hole, the radial hole of secondary cylinder piston body 3.4, oil guide pipe 3.6, then flowed out by the rodless cavity hydraulic fluid port B on cylinder head 5;Secondary cylinder 3 has The rodless cavity of rod cavity and three-level cylinder 4 forms choke-out cavity, and after first-stage cylinder 2 is stretched out in place, high pressure oil drives secondary cylinder 3 to overhanging again Out, the oil liquid at this time in 3 rod chamber of secondary cylinder enters the rodless cavity of three-level cylinder 4 by the radial through-hole on second level cylinder barrel 3.1, Push secondary cylinder 3 with three-level cylinder 4 simultaneously, it is synchronous protruding, while the oil liquid of 4 rod chamber of three-level cylinder flows through the work of three-level cylinder 4 The axial hole in radial hole, three-level cylinder 4 on stopper rod, then flowed out by the rodless cavity hydraulic fluid port B on cylinder head 5.
Preferably, when hydraulic cylinder needs to retract, high pressure oil is squeezed into from rod chamber hydraulic fluid port B to the rod chamber of three-level cylinder 4, together When 4 rodless cavity of three-level cylinder oil liquid enter the rod chamber of secondary cylinder 3, driving two by the radial through-hole on second level cylinder barrel 3.1 Grade cylinder 3 and three-level cylinder 4 are synchronous simultaneously to be retracted, when secondary cylinder 3 and the retraction of three-level cylinder 4 in place after, high-voltage oil liquid passes sequentially through lead again Oil pipe 3.6, the radial hole of secondary cylinder piston body 3.4, first-stage cylinder 2 close to piston portion radial through-hole, into the nothing of first-stage cylinder 2 Rod cavity, while the oil liquid of 2 rodless cavity of first-stage cylinder passes through the rod chamber hydraulic fluid port A outflow on cylinder bottom 6.
Preferably, the center of the axial described two through-holes of the first-stage cylinder guide sleeve 2.2 and first-stage cylinder guide sleeve 2.2 Center of circle three point on a straight line, 2.5 installation site of bleed screw are higher than 2.6 position of oil fill plug.
Preferably, the head end inner wall of the cylinder barrel 1 is sequentially installed with the first dustband 10, the second lattice along axial ecto-entad Lay circle 11, the second guide ring 12 to realize sealing and support with the piston rod portion of first-stage cylinder 2, the tail end outer rim of cylinder barrel 1 with Cylinder bottom 6 is threadedly coupled and realizes sealing by the first O-ring 7.
Preferably, the first lubricating cup 24 that promising bearing realizes lubrication is installed on the cylinder bottom 6.
Preferably, the second lubricating cup 27 that promising bearing realizes lubrication is installed on the cylinder head 5.
Preferably, the piston rod of first-stage cylinder 2 is radially provided with 4-8 through-hole close to the part of piston.
Preferably, in the multiple reciprocatory movement of hydraulic cylinder, when the rodless cavity of three-level cylinder 4 and the rod chamber of secondary cylinder 3 When the oil liquid leakage being formed by choke-out cavity, the plug-in one-way valve 3.5 installed on secondary cylinder piston body 3.4 is beaten automatically It opens, Xiang Suoshu choke-out cavity supplements oil liquid.
(3) beneficial effect
The present invention can significantly improve the flexible speed of heavy duty multistage hydraulic cylinder by the matched design between Multi-stage cylinder The grade impact frequency is changed in degree, reduction, solves that the processing and manufacturing of existing composite telescopic hydraulic cylinder is difficult, can not assemble, can not be oil-filled in advance The problem of;And the synchronous error generated in hydraulic cylinder reciprocating motion can be eliminated.
Detailed description of the invention
Fig. 1 is the overall structure cross-sectional view of the hydraulic cylinder designed in method of the invention;
Fig. 2 is the structural schematic diagram of first-stage cylinder in the hydraulic cylinder designed in method of the invention;
Fig. 3 is the structural schematic diagram of secondary cylinder in the hydraulic cylinder designed in method of the invention;
Fig. 4 is the structural schematic diagram of three-level cylinder in the hydraulic cylinder designed in method of the invention.
Wherein, 1- cylinder barrel, 2- first-stage cylinder, 2.1- level-one cylinder barrel, 2.2- first-stage cylinder guide sleeve, the sealing of 2.3- first-stage cylinder Circle, 2.4- first-stage cylinder screw thread baffle ring, 2.5- bleed screw, 2.6- oil fill plug;3- secondary cylinder, 3.1- second level cylinder barrel, 3.2- Secondary cylinder guide sleeve, 3.3- secondary cylinder sealing ring, 3.4- secondary cylinder piston body, 3.5- plug-in one-way valve, 3.6- oil guide pipe;4- Three-level cylinder, 5- cylinder head, 6- cylinder bottom;The first O-ring of 7-, the first Glais ring of 8-, the first guide ring of 9-, the first dustband of 10-, 11- Second Glais ring, the second guide ring of 12-, 13- third Glais ring, 14- third guide ring, the second dustband of 15-, the 4th lattice of 16- The 4th guide ring of Lai Quan, 17-, the 5th Glais ring of 18-, the 5th guide ring of 19-, 20- third dustband, the 6th Glais ring of 21-, The 6th guide ring of 22-, the second O-ring of 23-, the first lubricating cup of 24-, the 7th Glais ring of 25-, the 7th guide ring of 26-, the second oil of 27- Cup.
Specific embodiment
To keep the purpose of the present invention, content and advantage clearer, with reference to the accompanying drawings and examples, to of the invention Specific embodiment is described in further detail.
The present invention provides a kind of heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder, and this method is based on a kind of multistage Composite telescopic hydraulic cylinder realize, as shown in Figure 1, the multistage composite telescopic hydraulic cylinder design are as follows: including cylinder barrel 1, first-stage cylinder 2, Secondary cylinder 3, three-level cylinder 4, cylinder head 5, cylinder bottom 6 and different size O-ring, Glais ring, guide ring, dustband and lubricating cup, in which:
The cylinder barrel 1, first-stage cylinder 2, secondary cylinder 3 and 4 ecto-entad of three-level cylinder is successively nested forms, cylinder barrel 1 is cylindrical shape Structure, head end inner wall are sequentially installed with the first dustband 10, the second Glais ring 11, the second guide ring 12 along axial ecto-entad And sealing and support are realized with the piston rod portion of first-stage cylinder 2, the tail end outer rim of cylinder barrel 1 is threadedly coupled with cylinder bottom 6 and passes through the One O-ring 7 realizes sealing;
As shown in Figure 1 and Figure 2, the first-stage cylinder 2 includes level-one cylinder barrel 2.1, first-stage cylinder guide sleeve 2.2, first-stage cylinder sealing Circle 2.3, first-stage cylinder screw thread baffle ring 2.4, bleed screw 2.5 and oil fill plug 2.6;The level-one cylinder barrel 2.1 is cylindric knot Structure, first-stage cylinder guide sleeve 2.2 are flange disk-like structure, and first-stage cylinder screw thread baffle ring 2.4 is annular structure, level-one cylinder barrel 2.1 Head end inner wall be threadedly coupled with the outer rim of first-stage cylinder guide sleeve 2.2 and pass through first-stage cylinder sealing ring 2.3 sealing, first-stage cylinder guiding The cross section of set 2.2 is opened along axial direction there are two through-hole, and is that flange disk-like structure first-stage cylinder is oriented to close to flange in two through-holes One end of flange in set 2.2 is installed by the bleed screw 2.5 and oil fill plug 2.6, the inner wall of first-stage cylinder guide sleeve 2.2 respectively It is axial that second dustband 15 is inwardly sequentially installed with by described flange one end, the 4th Glais ring 16, the 4th guide ring 17 and with two The piston rod portion of grade cylinder 3 realizes sealing and support;The outer rim of 2.1 tail end of level-one cylinder barrel is equipped with the first Glais ring 8, first Guide ring 9 simultaneously realizes sealing and support with 1 inner wall of cylinder barrel;The inside of 2.1 tail end of level-one cylinder barrel and first-stage cylinder screw thread baffle ring 2.4 Outer rim be connected through a screw thread fastening, the piston rod of first-stage cylinder 2 is radially provided with 4-8 through-hole close to the part of piston;
As shown in Figure 1, Figure 3, the secondary cylinder 3 is again close including second level cylinder barrel 3.1, secondary cylinder guide sleeve 3.2, secondary cylinder Seal 3.3, secondary cylinder piston body 3.4, plug-in one-way valve 3.5 and oil guide pipe 3.6, the second level cylinder barrel 3.1 are cylindrical shape Structure, secondary cylinder guide sleeve 3.2 are flange disk-like structure, and secondary cylinder piston body 3.4 is cylindrical-shaped structure and is provided with ring at one end Connected in star;The head end inner wall of second level cylinder barrel 3.1 is threadedly coupled with the outer rim of secondary cylinder guide sleeve 3.2 and is sealed by secondary cylinder 3.3 sealing of circle, the inner wall of secondary cylinder guide sleeve 3.2 are axially inwardly sequentially installed with third dustband 20, the 6th lattice by flange end Lay circle 21, the 6th guide ring 22 simultaneously realize sealing and support, the tail end of second level cylinder barrel 3.1 with the piston rod portion of three-level cylinder 4 Be provided with 4-8 connection 3 rodless cavity of secondary cylinder and 4 rod chamber of three-level cylinder radial through-hole, the outer rim of 3.1 tail end of second level cylinder barrel and The annular groove inner wall of secondary cylinder piston body 3.4 is connected through a screw thread fastening, and secondary cylinder piston body 3.4 is along longitudinal center line It is provided with blind hole, one end of the oil guide pipe 3.6 is protruded into the blind hole and welded with secondary cylinder piston body 3.4 and fastens, from secondary cylinder The annular groove bottom of piston body 3.4, which is set out, opens up ladder hole along axial direction, and inserting is installed in the ladder hole Formula check valve 3.5 is also provided with the radial hole of connection first-stage cylinder 2 rod chamber and oil guide pipe 3.6, second level in secondary cylinder piston body 3.4 The outer rim of the cylinder piston body 3.4 is separately installed with third Glais ring 13, third guide ring 14 and with one along the two sides of the radial hole Grade 2 inner wall of cylinder realizes sealing and support, so that the oil liquid of the rodless cavity of the secondary cylinder 3 is flowed by plug-in one-way valve 3.5 The rodless cavity of three-level cylinder 4, reversed oil liquid can not circulate, radial through-hole and secondary cylinder piston body of the first-stage cylinder 2 close to piston portion Radial hole in 3.4 is linked up;
As Figure 1 and Figure 4, the outer rim of the three-level cylinder 4 is ladder shaft-like structure, and inside is provided with ladder along axial line Hole, the head end of the piston rod portion of three-level cylinder 4 are threadedly coupled with cylinder head 5 and are sealed by the second O-ring 23, the work of three-level cylinder 4 The tail end of rod portion is radially provided with 4-8 through-hole, the outer rim installation the 5th of the piston portion of three-level cylinder 4 close to piston region Glais ring 18, the 5th guide ring 19 simultaneously realize sealing and support, the inner hole of the piston portion of three-level cylinder 4 with the inner wall of secondary cylinder 3 7th Glais ring 25 and the 7th guide ring 26 are installed, the other end of the oil guide pipe 3.6 protrudes into the inside of three-level cylinder 4 and passes through 7th Glais ring 25 and the 7th guide ring 26 are realized sealing with three-level cylinder 4 and are supported;
The center of the axial described two through-holes of the first-stage cylinder guide sleeve 2.2 and the center of circle three of first-stage cylinder guide sleeve 2.2 Point is conllinear, and 2.5 installation site of bleed screw is higher than 2.6 position of oil fill plug;
The rodless cavity hydraulic fluid port A being connected to the rodless cavity of the rodless cavity of first-stage cylinder 2, secondary cylinder 3, cylinder are provided on the cylinder bottom 6 The rodless cavity hydraulic fluid port B being connected to the stepped hole, the oil guide pipe 3.6 in three-level cylinder 4 is provided on first 5;
The first lubricating cup 24 that promising bearing realizes lubrication is installed on the cylinder bottom 6, promising bearing is installed on cylinder head 5 and realizes profit The second sliding lubricating cup 27.
Based on it is above-mentioned with multistage composite telescopic hydraulic cylinder realize heavily loaded lifting method, comprising the following steps: before use, Bleed screw 2.5 and oil fill plug 2.6 are opened, it is hydraulic to the injection of the rod chamber of secondary cylinder 3 from the hole of installation oil fill plug 2.6 Oil is discharged at the hole that the air in the rod chamber of secondary cylinder 3 passes through installation bleed screw 2.5, and the rod chamber of secondary cylinder 3 fills liquid It is installed again after pressure oil and tightens bleed screw 2.5 and oil fill plug 2.6;
When hydraulic cylinder needs overhanging, high pressure oil is squeezed into from rodless cavity hydraulic fluid port A to the rodless cavity of first-stage cylinder 2, high pressure oil drives Dynamic first-stage cylinder 2 is stretched out first, while the oil liquid of 2 rod chamber of first-stage cylinder is logical close to the radial direction of piston portion followed by first-stage cylinder 2 Hole, the radial hole of secondary cylinder piston body 3.4, oil guide pipe 3.6, then flowed out by the rodless cavity hydraulic fluid port B on cylinder head 5;Secondary cylinder 3 has The rodless cavity of rod cavity and three-level cylinder 4 forms choke-out cavity, and after first-stage cylinder 2 is stretched out in place, high pressure oil drives secondary cylinder 3 to overhanging again Out, the oil liquid at this time in 3 rod chamber of secondary cylinder enters the rodless cavity of three-level cylinder 4 by the radial through-hole on second level cylinder barrel 3.1, Push secondary cylinder 3 with three-level cylinder 4 simultaneously, it is synchronous protruding, therefore hydraulic cylinder can be significantly improved and stretch out speed, while three-level The oil liquid of 4 rod chamber of cylinder flows through the radial hole on the piston rod of three-level cylinder 4, the axial hole in three-level cylinder 4, then by cylinder head 5 Rodless cavity hydraulic fluid port B outflow;And since secondary cylinder 3 and three-level cylinder 4 move simultaneously, is simultaneously stopped, there is no change grade to ask Topic, significantly reduces the shock absorbing frequency.
When hydraulic cylinder needs to retract, high pressure oil, while three-level are squeezed into from rod chamber hydraulic fluid port B to the rod chamber of three-level cylinder 4 The oil liquid of 4 rodless cavity of cylinder enters the rod chamber of secondary cylinder 3 by the radial through-hole on second level cylinder barrel 3.1, drives 3 He of secondary cylinder Three-level cylinder 4 is synchronous simultaneously to be retracted, after secondary cylinder 3 and three-level cylinder 4 retract in place, high-voltage oil liquid pass sequentially through again oil guide pipe 3.6, The radial hole of secondary cylinder piston body 3.4, first-stage cylinder 2 close to piston portion radial through-hole, into the rodless cavity of first-stage cylinder 2, together When 2 rodless cavity of first-stage cylinder oil liquid pass through the rod chamber hydraulic fluid port A outflow on cylinder bottom 6;
Realize that the exhaust of above-mentioned choke-out cavity is oil-filled by bleed screw 2.5 and oil fill plug 2.6, it is repeatedly past in hydraulic cylinder In multiple motion process, when the rodless cavity of three-level cylinder 4 and the rod chamber of secondary cylinder 3 are formed by the oil liquid leakage in choke-out cavity When, the plug-in one-way valve 3.5 installed on secondary cylinder piston body 3.4 automatically opens, and the choke-out cavity of Xiang Shangshu supplements oil liquid, into And it can guarantee the precision that secondary cylinder 3 and three-level cylinder 4 move synchronously.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations Also it should be regarded as protection scope of the present invention.

Claims (8)

1. a kind of heavily loaded lifting method based on multistage composite telescopic hydraulic cylinder, which is characterized in that this method is based on a kind of multistage Composite telescopic hydraulic cylinder realizes that the multistage composite telescopic hydraulic cylinder is designed as, including cylinder barrel (1), first-stage cylinder (2), secondary cylinder (3), three-level cylinder (4), cylinder head (5), cylinder bottom (6);The cylinder barrel (1), first-stage cylinder (2), secondary cylinder (3) and three-level cylinder (4) are by outer Inwardly successively nesting forms;The cylinder barrel (1) is cylinder-like structure, and the piston rod portion realization of head end and first-stage cylinder (2) is close Envelope and support, the tail end outer rim of cylinder barrel (1) connect and seal with cylinder bottom (6);The head end and cylinder of the piston rod portion of three-level cylinder (4) Head (5) is connected and is sealed;
The first-stage cylinder (2) includes level-one cylinder barrel (2.1), first-stage cylinder guide sleeve (2.2), first-stage cylinder sealing ring (2.3), level-one Cylinder screw thread baffle ring (2.4), bleed screw (2.5) and oil fill plug (2.6);The level-one cylinder barrel (2.1) is cylinder-like structure, First-stage cylinder guide sleeve (2.2) is flange disk-like structure, and first-stage cylinder screw thread baffle ring (2.4) is annular structure, level-one cylinder barrel (2.1) head end inner wall is threadedly coupled with the outer rim of first-stage cylinder guide sleeve (2.2) and passes through first-stage cylinder sealing ring (2.3) sealing, The cross section of first-stage cylinder guide sleeve (2.2) is opened along axial direction there are two through-hole, and is pacified respectively in two through-holes close to one end of flange The bleed screw (2.5) and oil fill plug (2.6) are filled, the inner wall of first-stage cylinder guide sleeve (2.2) is axial by described flange one end It is inwardly sequentially installed with the second dustband (15), the 4th Glais ring (16), the 4th guide ring (17) and the piston with secondary cylinder (3) Bar part realizes sealing and support;The outer rim of level-one cylinder barrel (2.1) tail end is equipped with the first Glais ring (8), the first guide ring (9) and with cylinder barrel (1) inner wall sealing and support are realized;The inside of level-one cylinder barrel (2.1) tail end and first-stage cylinder screw thread baffle ring (2.4) outer rim is connected through a screw thread fastening, and the piston rod of first-stage cylinder (2) is radially provided with multiple logical close to the part of piston Hole;
The secondary cylinder (3) includes second level cylinder barrel (3.1), secondary cylinder guide sleeve (3.2), secondary cylinder sealing ring (3.3), second level The cylinder piston body (3.4), plug-in one-way valve (3.5) and oil guide pipe (3.6), the second level cylinder barrel (3.1) are cylinder-like structure, Secondary cylinder guide sleeve (3.2) is flange disk-like structure, and secondary cylinder piston body (3.4) is cylindrical-shaped structure and is provided with annular at one end Groove;The head end inner wall of second level cylinder barrel (3.1) is threadedly coupled with the outer rim of secondary cylinder guide sleeve (3.2) and to pass through secondary cylinder close The inner wall of seal (3.3) sealing, secondary cylinder guide sleeve (3.2) is axially inwardly sequentially installed with third dustband by flange end (20), the 6th Glais ring (21), the 6th guide ring (22) and with the piston rod portion of three-level cylinder (4) realize sealing and support, two Grade cylinder barrel (3.1) tail end be provided with 4-8 be connected to secondary cylinder (3) rodless cavity and three-level cylinder (4) rod chamber radial through-hole, two The outer rim of grade cylinder barrel (3.1) tail end and the annular groove inner wall of secondary cylinder piston body (3.4) are connected through a screw thread fastening, Secondary cylinder piston body (3.4) is provided with blind hole along longitudinal center line, and one end of the oil guide pipe (3.6) protrudes into the blind hole and with two Grade the cylinder piston body (3.4) welds fastening, opens up rank along axial direction from the annular groove bottom of secondary cylinder piston body (3.4) Terraced through-hole, and plug-in one-way valve (3.5) are installed in the ladder hole, connection is also provided in secondary cylinder piston body (3.4) The radial hole of first-stage cylinder (2) rod chamber and oil guide pipe (3.6), the outer rim of secondary cylinder piston body (3.4) is along the two of the radial hole Side is separately installed with third Glais ring (13), third guide ring (14) and realizes sealing and support with first-stage cylinder (2) inner wall, thus The oil liquid of the rodless cavity of the secondary cylinder (3) flows into the rodless cavity of three-level cylinder (4), reverse oil by plug-in one-way valve (3.5) Liquid can not circulate, and first-stage cylinder (2) is connected to close to the radial through-hole of piston portion with the radial hole in secondary cylinder piston body (3.4);
The outer rim of the three-level cylinder (4) is ladder shaft-like structure, and inside is provided with stepped hole, the work of three-level cylinder (4) along axial line The head end of rod portion is threadedly coupled with cylinder head (5) and is sealed by the second O-ring (23), the piston rod portion of three-level cylinder (4) Tail end be radially provided with 4-8 through-hole close to piston region, the outer rim of the piston portion of three-level cylinder (4) installs the 5th Glais ring (18), the 5th guide ring (19) and with the inner wall of secondary cylinder (3) realize sealing and support, the piston portion of three-level cylinder (4) it is interior Hole is equipped with the 7th Glais ring (25) and the 7th guide ring (26), and the other end of the oil guide pipe (3.6) protrudes into three-level cylinder (4) Sealing and support are simultaneously realized by the 7th Glais ring (25) and the 7th guide ring (26) and three-level cylinder (4) in inside;
It is provided with the rodless cavity hydraulic fluid port A being connected to the rodless cavity of the rodless cavity of first-stage cylinder (2), secondary cylinder (3) on the cylinder bottom (6), The rodless cavity hydraulic fluid port B being connected to the stepped hole, the oil guide pipe (3.6) in three-level cylinder (4) is provided on cylinder head (5);
The heavily loaded lifting method realized based on the multistage composite telescopic hydraulic cylinder is the following steps are included: before use, the row of opening Gas plug screw (2.5) and oil fill plug (2.6) inject liquid to the rod chamber of secondary cylinder (3) from the hole of installation oil fill plug (2.6) Pressure oil is discharged at the hole that the air in the rod chamber of secondary cylinder (3) passes through installation bleed screw (2.5), and secondary cylinder (3) has bar Chamber, which fills to install again after hydraulic oil, tightens bleed screw (2.5) and oil fill plug (2.6);
When hydraulic cylinder needs overhanging, high pressure oil, high pressure oil driving are squeezed into from rodless cavity hydraulic fluid port A to the rodless cavity of first-stage cylinder (2) First-stage cylinder (2) is stretched out first, while the oil liquid of first-stage cylinder (2) rod chamber is followed by the diameter of first-stage cylinder (2) close piston portion It is flowed out to through-hole, the radial hole of secondary cylinder piston body (3.4), oil guide pipe (3.6), then by the rodless cavity hydraulic fluid port B on cylinder head (5); The rod chamber of secondary cylinder (3) and the rodless cavity of three-level cylinder (4) form choke-out cavity, and after first-stage cylinder (2) is stretched out in place, high pressure oil is again Drive secondary cylinder (3) protruding, the oil liquid in secondary cylinder (3) rod chamber passes through the radial direction on second level cylinder barrel (3.1) at this time Through-hole enters the rodless cavity of three-level cylinder (4), push secondary cylinder (3) with three-level cylinder (4) simultaneously, synchronous protruding, while three-level The oil liquid of cylinder (4) rod chamber flows through the radial hole on the piston rod of three-level cylinder (4), the axial hole in three-level cylinder (4), then by cylinder head (5) the rodless cavity hydraulic fluid port B outflow on.
2. the method as described in claim 1, which is characterized in that when hydraulic cylinder needs to retract, from rod chamber hydraulic fluid port B to three-level The rod chamber of cylinder (4) squeezes into high pressure oil, while the oil liquid of three-level cylinder (4) rodless cavity passes through the radial direction on second level cylinder barrel (3.1) Through-hole enters the rod chamber of secondary cylinder (3), driving secondary cylinder (3) and three-level cylinder (4) synchronous retraction simultaneously, when secondary cylinder (3) and Three-level cylinder (4) retract in place after, high-voltage oil liquid pass sequentially through again oil guide pipe (3.6), secondary cylinder piston body (3.4) radial hole, First-stage cylinder (2) close to piston portion radial through-hole, into the rodless cavity of first-stage cylinder (2), while the oil of first-stage cylinder (2) rodless cavity Liquid passes through the rod chamber hydraulic fluid port A outflow on cylinder bottom (6).
3. method according to claim 2, which is characterized in that the described two of first-stage cylinder guide sleeve (2.2) axial direction are led to The center in hole and the center of circle three point on a straight line of first-stage cylinder guide sleeve (2.2), bleed screw (2.5) installation site are higher than oil fill plug (2.6) position.
4. method according to claim 2, which is characterized in that the head end inner wall of the cylinder barrel (1) along axial ecto-entad according to Secondary to be equipped with the first dustband (10), the second Glais ring (11), the second guide ring (12) are to the piston bar portion with first-stage cylinder (2) Point realize sealing and support, the tail end outer rim of cylinder barrel (1) is threadedly coupled with cylinder bottom (6) and to pass through the first O-ring (7) realization close Envelope.
5. method according to claim 2, which is characterized in that install promising bearing realizes lubrication the on the cylinder bottom (6) One lubricating cup (24).
6. method according to claim 2, which is characterized in that install promising bearing realizes lubrication the on the cylinder head (5) Two lubricating cups (27).
7. method according to claim 2, which is characterized in that the piston rod of first-stage cylinder (2) close to the part of piston radially It is provided with 4-8 through-hole.
8. method according to claim 2, which is characterized in that in the multiple reciprocatory movement of hydraulic cylinder, when three-level cylinder (4) Rodless cavity and the rod chamber of secondary cylinder (3) when being formed by the oil liquid leakage in choke-out cavity, on secondary cylinder piston body (3.4) The plug-in one-way valve (3.5) of installation automatically opens, and Xiang Suoshu choke-out cavity supplements oil liquid.
CN201910749312.5A 2019-08-14 2019-08-14 Heavy-load lifting method based on multi-stage composite telescopic hydraulic cylinder Active CN110451422B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1429996A (en) * 2003-01-21 2003-07-16 厦门大学 Multistage location sylinder
CN104314917A (en) * 2014-10-10 2015-01-28 北京机械设备研究所 Local synchronization multistage oil cylinder applicable to heavy load
CN105298981A (en) * 2015-10-12 2016-02-03 江苏恒立高压油缸股份有限公司 Safe and reliable derrick lifting multistage cylinder
CN205478640U (en) * 2016-01-12 2016-08-17 山东万通液压股份有限公司 Double -acting single -piston -rod hydraulic cylinder
CN208845471U (en) * 2018-09-18 2019-05-10 重庆市巴山液压附件厂有限公司 A kind of synchronous hydraulic oil cylinder

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1429996A (en) * 2003-01-21 2003-07-16 厦门大学 Multistage location sylinder
CN104314917A (en) * 2014-10-10 2015-01-28 北京机械设备研究所 Local synchronization multistage oil cylinder applicable to heavy load
CN105298981A (en) * 2015-10-12 2016-02-03 江苏恒立高压油缸股份有限公司 Safe and reliable derrick lifting multistage cylinder
CN205478640U (en) * 2016-01-12 2016-08-17 山东万通液压股份有限公司 Double -acting single -piston -rod hydraulic cylinder
CN208845471U (en) * 2018-09-18 2019-05-10 重庆市巴山液压附件厂有限公司 A kind of synchronous hydraulic oil cylinder

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