CN107387491B - Double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support - Google Patents
Double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support Download PDFInfo
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- CN107387491B CN107387491B CN201610323894.7A CN201610323894A CN107387491B CN 107387491 B CN107387491 B CN 107387491B CN 201610323894 A CN201610323894 A CN 201610323894A CN 107387491 B CN107387491 B CN 107387491B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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Abstract
The invention discloses a kind of double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic supports, belong to technical field of hydraulic pressure.The double-action hydraulic mechanism includes the first cylinder body 3, the second cylinder body 7, the first guide sleeve 4, the second guide sleeve 14, piston rod 5, piston 6, the first valve seat 32, the first valve 25.The multi-stage expansion hydraulic mechanism includes outermost cylinder body 1, several central housings 2, double-action hydraulic mechanism provided by the invention, the second valve seat 49, the second valve 13.The hydraulic support includes multi-stage expansion hydraulic mechanism provided by the invention, column cap 8.Not only there is biggish magnification to reduce the material performance requirement of sealing element and cylinder barrel also by introducing double-action hydraulic mechanism for the double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support.
Description
Technical field
The present invention relates to technical field of hydraulic pressure, more particularly to a kind of double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism
And hydraulic support.
Background technique
The service life of hydraulic support, high-end shelf life was up to 10 years or more generally all in 5~10 years, in the entire period of service,
Bracket is frequently necessary to be mounted on different coal seams or even different mines.In addition, in order to facilitate equipment management, many coal collection
Group wishes reduction bracket model, and this requires brackets versatility.The hydraulic support of multiple mines, a variety of coal seams can be applicable in
Have a vast market demand.
An important factor for adaptability to coal seam thickness and its variation is restriction bracket general, and pillar construction is shadow
Ring the key factor of the bracket performance.
The multi-stage expansion mechanism of pillar construction in the prior art application stretch it is smaller, also, to sealing element and hydraulic
The material performance requirement of cylinder cylinder barrel is higher.
Summary of the invention
In view of this, the present invention provides a kind of double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support, no
Only there is biggish magnification to reduce the material performance requirement of sealing element and cylinder barrel also by introducing double-action hydraulic mechanism,
Thus more suitable for practical.
In order to reach above-mentioned first purpose, the technical solution of double-action hydraulic mechanism provided by the invention is as follows：
Double-action hydraulic mechanism provided by the invention is led including the first cylinder body 3, the second cylinder body 7, the first guide sleeve 4, second
To set 14, piston rod 5, piston 6, the first valve seat 32, the first valve 15,
First valve seat 32 is fixedly connected on the proximal end of first cylinder body 3, and first valve 15 is by being set to
The first valve opening 36 on first valve seat 32 is set on first valve seat 32；
Second cylinder body 7 is sheathed in first cylinder body 3,
First guide sleeve 4 is fixedly connected on the proximal end of second cylinder body 7 and the inner wall structure with first cylinder body 3
At sliding pair,
Second guide sleeve 14 is fixedly connected on the inner wall of first cylinder body 3, by the inner cavity of first cylinder body 3 point
It is divided into the first cavity 20 of distal end and the second cavity 25 of proximal end, second cavity 25 passes through first valve opening 36 and the external world
Connection；
Second guide sleeve 14 is additionally provided with the first inlet opening 23, by first inlet opening 23, second cavity
25 are connected to first cavity 20；
The inner wall of the piston 6 and second cylinder body 7 constitutes sliding pair, by the piston 6, second cylinder body
Inner cavity is separated into the third cavity 22 of proximal end and the 4th cavity 21 of distal end, and the third cavity 22 is by time fluid path diameter and outside
Boundary's connection；
First guide sleeve 4 is equipped with first through hole, and second guide sleeve 14 is equipped with the second through-hole, the piston
6 are equipped with third through-hole, and the piston rod 5 passes through the first through hole, the second through-hole and third through-hole；
The piston rod 5 is equipped with the second inlet opening 12, by second inlet opening 12, second cavity 25 and institute
State the connection of the 4th cavity 21.
Double-action hydraulic mechanism provided by the invention also can be used following technical measures and further realize.
Preferably, the double-action hydraulic mechanism further includes the first sealing ring 46, the second sealing ring 47, third sealing ring
48,
First sealing ring 46 is set between first guide sleeve 4 and the inner wall of the first cylinder body 3, and described second is close
Seal 47 is set between the piston 6 and second cylinder body 7, and the third sealing ring 48 is set to first guide sleeve
Between 4 and the piston rod 5.
Preferably, having gap 29 between the top of first valve 15 and the proximal end of the piston rod 5.
In order to reach above-mentioned second purpose, the technical solution of multi-stage expansion hydraulic mechanism provided by the invention is as follows：
Multi-stage expansion hydraulic mechanism provided by the invention includes that outermost cylinder body 1, several central housings 2, the present invention mention
The double-action hydraulic mechanism of confession, the second valve seat 49, the second valve 13,
Several central housings 2 layering is nested one by one, and in composition sliding pair between each other；
The double-action hydraulic mechanism is nested in innermost layer central housing 2, in first cylinder body 3 and the innermost layer
Between cylinder body 2 inner wall between constitute sliding pair；
The 5th cavity 19 is equipped with inside the innermost layer central housing 2, when first valve 15 is in the open state,
5th cavity 19 is connected to by first valve opening 36 with second cavity 25；
Second valve seat 49 is fixedly connected on the proximal end of the innermost layer central housing 2, and second valve 13 passes through
The second valve opening 50 being set on second valve seat 49 is set on second valve seat 49；
The 6th cavity 18 is equipped with inside the outermost cylinder body 1, it is described when second valve 13 is in the open state
6th cavity 18 is connected to by second valve opening 50 with the 5th cavity 19；
Third inlet opening 16 is additionally provided on the outer wall of the outermost cylinder body 1, the 6th cavity 18 passes through the third
Inlet opening 16 is in communication with the outside, and hydraulic oil enters the 6th cavity 18 by the third inlet opening 16.
Multi-stage expansion hydraulic mechanism provided by the invention also can be used following technical measures and further realize.
Preferably, the pedestal 53 of the outermost cylinder body 1 be equipped with the first protrusion 51, it is described first protrusion 51 be in
The position of second valve opening 50 of outermost central housing 2 is corresponding.
Preferably, the top of the second valve 13 of the central housing 2 is equipped with the second protrusion 52, second protrusion 52
It is corresponding with the adjacent position of the second valve opening 50 or the first valve opening 36.
Preferably, the feed liquor path of the multi-stage expansion hydraulic mechanism includes that oil inlet pipe 54 and the first hydraulic oil enter and leave
Mouth 39, the first hydraulic oil entrance 39 are connected to by oil inlet pipe 54 and the third inlet opening 16 with the 6th cavity 18.
Preferably, the fluid path diameter that returns of the multi-stage expansion hydraulic mechanism includes being set on first guide sleeve 4
Hole for back flow 11 is formed in casing walls at different levels and goes back to the gap between liquid access and adjacent two-stage cylinder；Wherein, the hole for back flow
11 one end is connected to the third cavity 22, the other end of the hole for back flow 11 and first cylinder body 3 and the second cylinder body 7 it
Between gap connection.
Preferably, the multi-stage expansion hydraulic mechanism further includes seal plug, the seal plug is set to adjacent two
The distal end in the gap between grade cylinder body.
In order to reach above-mentioned third purpose, the technical solution of hydraulic support provided by the invention is as follows：
Hydraulic support provided by the invention includes multi-stage expansion hydraulic mechanism provided by the invention, column cap 8, the column cap 8
It is fixedly connected on the distal end of second cylinder body 7.
Double-action hydraulic mechanism provided by the invention is in use, when first valve 15 is in the open state, liquid
Pressure oil enters the second cavity 25 through first valve 15 first；Enter the 4th cavity 21 using second inlet opening 12,
Enter first cavity 20 by several first inlet openings 23, third cavity 22 is compressed, the liquid in third cavity 22
By returning fluid path diameter, (in the present embodiment, return fluid path diameter includes the hole for back flow 11 being arranged on the first guide sleeve 4, in the to pressure oil
Gap between one cylinder body 3 and the second cylinder body 7, first time liquid access 10 being set in 3 casing wall of the first cylinder body) it is forced out, make
Second cylinder body 7 is obtained to stretch out relative to first cylinder body 3.When dropping column, hydraulic oil in first cavity 20 according to
It is secondary to be exported by several first inlet openings 23, the second cavity 25, the first valve 15；Hydraulic oil in the 4th cavity 21
Successively by second inlet opening 12, the second cavity 25, the export of the first valve 15；By returning the countercurrent direction of fluid path diameter, liquid
Pressure oil is filled with third cavity 22 again, so that the second cylinder body 7 is retracted relative to the first cylinder body 3.Due to the first cavity 20 and the 4th
Cavity 21 applies active force from two sides respectively, so that the second cylinder body 7 is stretched out relative to the first cylinder body 3.In above-mentioned action process,
If only piston 6 undertakes pressure, the pressure for necessarily causing it to undertake is very big, to the material performance requirement of sealing element and cylinder barrel compared with
It is high；And in double-action hydraulic mechanism provided by the invention, due to the first guide sleeve 4, piston 6 can shared pressure, because
This, can reduce hydraulic oil pressure, and therefore, double-action hydraulic mechanism provided by the invention can be in the lower item of hydraulic oil pressure
Magnification is improved under part, also, reduces the material performance requirement of sealing element and cylinder barrel.
Multi-stage expansion hydraulic mechanism provided by the invention apply double-action hydraulic mechanism provided by the invention, by third into
When fluid apertures 16 is to 18 input hydraulic pressure oil of the 6th cavity, as 18 volume of the 6th cavity increases, central housing 2 stretches out, and works as middle cylinder
After body 2 reaches extreme position, the second valve 13 is in the open state, and the hydraulic oil continued to flow into is entered by the second valve opening 50
5th cavity 19, then, the first cylinder body 3 stretch out, and after the first cylinder body 3 reaches extreme position, the hydraulic oil continued to flow into is logical
It crosses the first valve opening 36 and enters the second cavity 25, and then flow to the first cavity 20 and the 4th cavity 21 respectively, be in third cavity 22
Interior hydraulic oil then passes through back fluid path diameter and is forced out, so that the second cylinder body 7 stretches out.When dropping column, in first cavity 20
Hydraulic oil successively by several first inlet openings 23, the second cavity 25, the first valve 15 export, then, successively pass through the 5th
After cavity 19, the second valve 13, the 6th cavity 18, third inlet opening 16, oil inlet pipe 54, from 39 quilt of the first hydraulic oil entrance
Recycling；Hydraulic oil in the 4th cavity 21 successively passes through second inlet opening 12, the second cavity 25, the first valve
Then 15 export successively pass through the 5th cavity 19, the second valve 13, the 6th cavity 18, third inlet opening 16, oil inlet pipe 54
Afterwards, it is recovered from the first hydraulic oil entrance 39；By returning the countercurrent direction of fluid path diameter, hydraulic oil is filled with third cavity again
22, so that the second cylinder body 7 is retracted relative to the first cylinder body 3.It can improve magnification under the conditions of hydraulic oil pressure is lower.
In addition, necessarily causing the integral diameter of the multi-stage expansion hydraulic mechanism to increase, at this point, being as the series of central housing 2 increases
The diameter of reduction multi-stage expansion hydraulic mechanism provided in an embodiment of the present invention, then need the double-action hydraulic press that will wherein apply
The diameter of structure reduces.At this point, the pressure for necessarily causing it to undertake is very big, to sealing element and cylinder if only piston 6 undertakes pressure
The material performance requirement of cylinder is higher；And in multi-stage expansion hydraulic mechanism provided by the invention, due to the first guide sleeve 4, piston 6
Can shared pressure therefore can reduce hydraulic oil pressure, therefore, multi-stage expansion provided in an embodiment of the present invention is hydraulic
Mechanism can reduce the material performance requirement of sealing element and cylinder barrel.
Hydraulic support provided by the invention applies multi-stage expansion hydraulic mechanism provided by the invention, therefore, the hydraulic support
Also magnification can be improved under the conditions of hydraulic oil pressure is lower, also, the material property for reducing sealing element and cylinder barrel is wanted
It asks.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings：
Fig. 1 is the schematic cross-sectional view of double-action hydraulic mechanism provided in an embodiment of the present invention；
Fig. 2 is the schematic cross-sectional view of three-level telescopic hydraulic provided in an embodiment of the present invention mechanism；
Fig. 3 is the partial enlargement diagram of part A in Fig. 2.
Specific embodiment
The present invention in order to solve the problems existing in the prior art, provides a kind of double-action hydraulic mechanism, multi-stage expansion hydraulic press
Not only there is biggish magnification to reduce sealing element and cylinder also by introducing double-action hydraulic mechanism for structure and hydraulic support
The material performance requirement of cylinder, thus more suitable for practical.
It is of the invention to reach the technical means and efficacy that predetermined goal of the invention is taken further to illustrate, below in conjunction with
Attached drawing and preferred embodiment, to double-action hydraulic mechanism proposed according to the present invention, multi-stage expansion hydraulic mechanism and hydraulic support,
Its specific embodiment, structure, feature and its effect, detailed description is as follows.In the following description, different " embodiment " or
What " embodiment " referred to is not necessarily the same embodiment.In addition, the special characteristic, structure or feature in one or more embodiments can
It is combined by any suitable form.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, is specifically interpreted as：It can simultaneously include A and B, can be with individualism A, it can also be with individualism
B can have above-mentioned three kinds of any case.
Technical solution of the present invention for ease of description, herein " proximal end " refer to close to Fig. 1, left side shown in Fig. 2
One end, " distal end " refer to one end close to the right side of Fig. 1, Fig. 2.
Technical solution of the present invention for ease of description, in the terms such as herein " inlet opening ", " hole for back flow " " into
The flow direction of hydraulic fluid when liquid ", " returning liquid " are referring to hydraulic mechanism extending action.Those skilled in the art should manage
Solution, in hydraulic mechanism contractive action, hydraulic fluid will be according to the flow direction flowing opposite with when extending action.
Embodiment one
Referring to attached drawing 1, the double-action hydraulic mechanism that the embodiment of the present invention one provides include the first cylinder body 3, the second cylinder body 7,
First guide sleeve 4, the second guide sleeve 14, piston rod 5, piston 6, the first valve seat 32, the first valve 15.First valve seat 32 is fixed to be connected
Be connected to the first cylinder body 3 proximal end (in the present embodiment, the first valve seat 32 by solder joint 37 be welded to connect in the close of the first cylinder body 3
End), the first valve 15 is set on the first valve seat 32 by the first valve opening 36 being set on the first valve seat 32；Second cylinder body 7
It is sheathed in the first cylinder body 3, the first guide sleeve 4 is fixedly connected on the proximal end of the second cylinder body 7 and constitutes with the inner wall of the first cylinder body 3
Sliding pair, the second guide sleeve 14 are fixedly connected on the inner wall of the first cylinder body 3, and the inner cavity of the first cylinder body 3 is divided into the of distal end
Second cavity 25 of one cavity 20 and proximal end, the second cavity 25 are in communication with the outside by the first valve opening 36；Second guide sleeve 14 is also
Equipped with the first inlet opening 23, by the first inlet opening 23, the second cavity 25 is connected to the first cavity 20；Piston 6 and the second cylinder body 7
Inner wall constitute sliding pair, by piston 6, the inner cavity of the second cylinder body be separated into proximal end third cavity 22 and distal end the 4th
Cavity 21, third cavity 22 are in communication with the outside by returning fluid path diameter；First guide sleeve 4 is equipped with first through hole, the second guide sleeve
14 are equipped with the second through-hole, and piston 6 is equipped with third through-hole, and piston rod 5 passes through first through hole, the second through-hole and third through-hole；
Piston rod 5 is equipped with the second inlet opening 12, and by the second inlet opening 12, the second cavity 25 is connected to the 4th cavity 21.
Double-action hydraulic mechanism provided by the invention is in use, when the first valve 15 is in the open state, hydraulic oil
Enter the second cavity 25 through the first valve 15 first；Enter the 4th cavity 21 using the second inlet opening 12, by several first
Inlet opening 23 enters the first cavity 20, and third cavity 22 is compressed, and the hydraulic oil in third cavity 22 is by returning fluid path diameter
(in the present embodiment, returning fluid path diameter includes the hole for back flow 11 being arranged on the first guide sleeve 4, in the first cylinder body 3 and the second cylinder body
Gap between 7, first time liquid access 10 being set in 3 casing wall of the first cylinder body) be forced out so that the second cylinder body 7 relative to
First cylinder body 3 stretches out.When dropping column, the hydraulic oil in the first cavity 20 successively passes through several first inlet openings 23, the second chamber
Body 25, the export of the first valve 15；Hydraulic oil in the 4th cavity 21 successively pass through the second inlet opening 12, the second cavity 25,
The export of first valve 15；By returning the countercurrent direction of fluid path diameter, hydraulic oil is filled with third cavity 22 again, so that the second cylinder body 7
It is retracted relative to the first cylinder body 3.Since the first cavity 20 and the 4th cavity 21 apply active force from two sides respectively, so that the second cylinder
Body 7 is stretched out relative to the first cylinder body 3.In above-mentioned action process, if only piston 6 undertakes pressure, necessarily it is caused to undertake
Pressure it is very big, it is higher to the material performance requirement of sealing element and cylinder barrel；And in double-action hydraulic provided in an embodiment of the present invention
In mechanism, due to the first guide sleeve 4, piston 6 can shared pressure, can reduce hydraulic oil pressure, therefore, this
The double-action hydraulic mechanism that invention provides can improve magnification under the conditions of hydraulic oil pressure is lower, also, reduce close
The material performance requirement of sealing and cylinder barrel.
Wherein, double-action hydraulic mechanism further includes the first sealing ring 46, the second sealing ring 47, third sealing ring 48.First
Sealing ring 46 is set between the first guide sleeve 4 and the inner wall of the first cylinder body 3, and the second sealing ring 47 is set to piston 6 and second
Between cylinder body 7, third sealing ring 48 is set between the first guide sleeve 4 and piston rod 5.To guarantee the first cavity 20, third
Cavity 22, the 4th cavity 21 are each other without interference, to guarantee what the second cylinder body 7 was extended and retracted relative to the first cylinder body 3
Effect stability.
Wherein, there is gap 29 between the top of the first valve 15 and the proximal end of piston rod 5.To guarantee the second inlet opening
12 being capable of smooth feed liquor and time liquid.
Wherein, double-action hydraulic mechanism further includes the first stop part 27, the second stop part 40.First stop part 27 and piston
The proximal end tight fit of bar 5, the proximal diameter of the second through-hole of outer diameter > of the first stop part 27；Second stop part 40 and piston rod 5
Distal end tight fit, the distal diameter of the outer diameter > third through-hole of the second stop part 40.To guarantee piston rod 5 and the second guiding
Connective stability between set 14, piston 6.
Embodiment two
Referring to attached drawing 2, multi-stage expansion hydraulic mechanism provided by Embodiment 2 of the present invention include outermost cylinder body 1, several
Central housing 2, double-action hydraulic mechanism provided by the invention, the second valve seat 49, the second valve 13.Several central housings 2 divide
Layer is nested one by one, and in composition sliding pair between each other；Double-action hydraulic mechanism is nested in innermost layer central housing 2, and first
Sliding pair is constituted between cylinder body 3 and the inner wall of innermost layer central housing 2；The 5th cavity 19 is equipped with inside innermost layer central housing 2,
When the first valve 15 is in the open state, the 5th cavity 19 is connected to by the first valve opening 36 with the second cavity 25；Second valve seat
49 are fixedly connected on the proximal end of innermost layer central housing 2, and the second valve 13 passes through the second valve opening for being set on the second valve seat 49
50 are set on the second valve seat 49；The 6th cavity 18 is equipped with inside outermost cylinder body 1, when the second valve 13 is in the open state
When, the 6th cavity 18 is connected to by the second valve opening 50 with the 5th cavity 19；Third feed liquor is additionally provided on the outer wall of outermost cylinder body 1
Hole 16, the 6th cavity 18 are in communication with the outside by third inlet opening 16, and hydraulic oil enters the 6th cavity by third inlet opening 16
18。
The double acting liquid that the multi-stage expansion hydraulic mechanism application embodiment of the present invention one provided by Embodiment 2 of the present invention provides
Press mechanism, when by third inlet opening 16 to 18 input hydraulic pressure oil of the 6th cavity, as 18 volume of the 6th cavity increases, middle cylinder
Body 2 stretches out, and after central housing 2 reaches extreme position, the second valve 13 is in the open state, and the hydraulic oil continued to flow into is logical
It crosses the second valve opening 50 and enters the 5th cavity 19, then, the first cylinder body 3 stretches out, after the first cylinder body 3 reaches extreme position, after
The hydraulic oil that afterflow enters enters the second cavity 25 by the first valve opening 36, and then flows to the first cavity 20 and the 4th cavity respectively
21, the hydraulic oil in third cavity 22 then passes through back fluid path diameter and is forced out, so that the second cylinder body 7 stretches out.When dropping column, it is in
Hydraulic oil in first cavity 20 is successively by several first inlet openings 23, the second cavity 25, the export of the first valve 15, then,
It is hydraulic from first successively after the 5th cavity 19, the second valve 13, the 6th cavity 18, third inlet opening 16, oil inlet pipe 54
Oily entrance 39 is recovered；Hydraulic oil in the 4th cavity 21 successively passes through the second inlet opening 12, the second cavity 25, first
Valve 15 exports, and then, successively passes through the 5th cavity 19, the second valve 13, the 6th cavity 18, third inlet opening 16, oil inlet pipe
Behind road 54, it is recovered from the first hydraulic oil entrance 39；By returning the countercurrent direction of fluid path diameter, hydraulic oil is filled with third chamber again
Body 22, so that the second cylinder body 7 is retracted relative to the first cylinder body 3.It can improve flexible under the conditions of hydraulic oil pressure is lower
Than.In addition, necessarily cause the integral diameter of the multi-stage expansion hydraulic mechanism to increase as the series of central housing 2 increases, this
When, in order to reduce the diameter of multi-stage expansion hydraulic mechanism provided in an embodiment of the present invention, then need the double acting that will wherein apply
The diameter of hydraulic mechanism reduces.At this point, the pressure for necessarily causing it to undertake is very big, to sealing if only piston 6 undertakes pressure
The material performance requirement of part and cylinder barrel is higher；And in multi-stage expansion hydraulic mechanism provided in an embodiment of the present invention, due to first
Guide sleeve 4, piston 6 can shared pressure therefore can reduce hydraulic oil pressure, it is therefore, provided in an embodiment of the present invention
Multi-stage expansion hydraulic mechanism can reduce the material performance requirement of sealing element and cylinder barrel.
Wherein, the pedestal 53 of outermost cylinder body 1 is equipped with the first protrusion 51, the first protrusion 51 and in outermost centre
The position of second valve opening 50 of cylinder body 2 is corresponding.So that when being resetted in outermost central housing 2, it can be with outermost
1 centering effect of cylinder body is more preferable.
Wherein, the top of the second valve 13 of central housing 2 is equipped with the second protrusion 52, the second protrusion 52 and adjacent second
The position of valve opening 50 or the first valve opening 36 is corresponding.To guarantee at different levels, the first cylinder body 3, the second cylinder body 7 in central housing
Centering effect is more preferable after the reset.
Wherein, the feed liquor path of multi-stage expansion hydraulic mechanism includes oil inlet pipe 54 and the first hydraulic oil entrance 39, and
One hydraulic oil entrance 39 is connected to by oil inlet pipe 54 and third inlet opening 16 with the 6th cavity 18.
Wherein, the fluid path diameter that returns of multi-stage expansion hydraulic mechanism includes the hole for back flow 11 being set on the first guide sleeve 4, is formed
In going back to gap between liquid access and adjacent two-stage cylinder in casing walls at different levels；Wherein, one end of hole for back flow 11 and third chamber
Body 22 is connected to, and the gap between the other end of hole for back flow 11 and the first cylinder body 3 and the second cylinder body 7 is connected to.It is provided in this embodiment
Multi-stage expansion hydraulic mechanism is three-level telescopic hydraulic mechanism, and central housing 2 is only 1, therefore, returns fluid path diameter by being set to first
Hole for back flow 11, the first cylinder body 3 on guide sleeve 4 and the gap between the second cylinder body 7, be formed in 3 casing wall of the first cylinder body
Gap between a time liquid access 10, the first cylinder body 3 and central housing 2, second time liquid being formed in 2 casing wall of central housing are logical
The communication path that gap between road 9, central housing 2 and outermost cylinder body is constituted is constituted, the hydraulic oil energy in third cavity 22
Enough entered by this time fluid path diameter, can also be recovered after this time fluid path diameter from the second hydraulic oil entrance 17.
Wherein, multi-stage expansion hydraulic mechanism further includes seal plug, and seal plug is set between adjacent two-stage cylinder
The distal end in gap.Hydraulic oil to be guaranteed at back in liquid access is unlikely to leak out from the gap between adjacent two-stage cylinder.
Multi-stage expansion hydraulic mechanism provided in this embodiment is three-level telescopic hydraulic mechanism, in the gap of the first cylinder body 3 and the second cylinder body 7
Distal end be equipped with the first seal plug 55, the gap of the first cylinder body 3 and central housing 2 distal end be equipped with the second seal plug
56, third seal plug 57 is equipped in the distal end in the gap of central housing 2 and outermost cylinder body 1.
Embodiment three
The hydraulic support that the embodiment of the present invention three provides includes multi-stage expansion hydraulic mechanism provided by the invention, column cap (8),
Column cap (8) is fixedly connected on the distal end of the second cylinder body (7).
The hydraulic support that the embodiment of the present invention three provides applies multi-stage expansion hydraulic mechanism provided by Embodiment 2 of the present invention,
Therefore, which can also improve magnification under the conditions of hydraulic oil pressure is lower, also, reduce sealing element and cylinder
The material performance requirement of cylinder.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of double-action hydraulic mechanism, which is characterized in that including the first cylinder body (3), the second cylinder body (7), the first guide sleeve
(4), the second guide sleeve (14), piston rod (5), piston (6), the first valve seat (32), the first valve (15),
First valve seat (32) is fixedly connected on the proximal end of first cylinder body (3), and first valve (15) passes through setting
It is set on first valve seat (32) in the first valve opening (36) on first valve seat (32)；
Second cylinder body (7) is sheathed in first cylinder body (3),
First guide sleeve (4) is fixedly connected on the proximal end of second cylinder body (7) and the inner wall with first cylinder body (3)
Sliding pair is constituted,
Second guide sleeve (14) is fixedly connected on the inner wall of first cylinder body (3), by the inner cavity of first cylinder body (3)
It is divided into the first cavity (20) of distal end and the second cavity (25) of proximal end, second cavity (25) passes through first valve opening
(36) it is in communication with the outside；
Second guide sleeve (14) is additionally provided with the first inlet opening (23), passes through first inlet opening (23), second chamber
Body (25) is connected to first cavity (20)；
The inner wall of the piston (6) and second cylinder body (7) constitutes sliding pair, by the piston (6), second cylinder body
Inner cavity be separated into the third cavity (22) of proximal end and the 4th cavity (21) of distal end, the third cavity (22), which passes through, returns liquid
Path is in communication with the outside；
First guide sleeve (4) is equipped with first through hole, and second guide sleeve (14) is equipped with the second through-hole, the piston
(6) it is equipped with third through-hole, the piston rod (5) passes through the first through hole, the second through-hole and third through-hole；
The second inlet opening (12) are equipped in the piston rod (5), by second inlet opening (12), second cavity (25)
It is connected to the 4th cavity (21).
2. double-action hydraulic mechanism according to claim 1, which is characterized in that further include the first sealing ring (46), second
Sealing ring (47), third sealing ring (48),
First sealing ring (46) is set between first guide sleeve (4) and the inner wall of the first cylinder body (3), and described second
Sealing ring (47) is set between the piston (6) and second cylinder body (7), and the third sealing ring (48) is set to described
Between first guide sleeve (4) and the piston rod (5).
3. double-action hydraulic mechanism according to claim 1, which is characterized in that the top of first valve (15) and institute
Stating between the proximal end of piston rod (5) has gap (29).
4. a kind of multi-stage expansion hydraulic mechanism, which is characterized in that including outermost cylinder body (1), several central housings (2), power
Benefit requires any double-action hydraulic mechanism, the second valve seat (49), the second valve (13) in 1~3,
Several central housings (2) layering is nested one by one, and in composition sliding pair between each other；
The double-action hydraulic mechanism is nested in innermost layer central housing (2), in first cylinder body (3) and the innermost layer
Between cylinder body (2) inner wall between constitute sliding pair；
The 5th cavity (19) is equipped with inside the innermost layer central housing (2), when first valve (15) is in the open state
When, the 5th cavity (19) is connected to by first valve opening (36) with second cavity (25)；
Second valve seat (49) is fixedly connected on the proximal end of the innermost layer central housing (2), and second valve (13) is logical
The second valve opening (50) being set on second valve seat (49) is crossed to be set on second valve seat (49)；
The 6th cavity (18), when second valve (13) is in the open state, institute are equipped with inside the outermost cylinder body (1)
The 6th cavity (18) is stated to be connected to by second valve opening (50) with the 5th cavity (19)；
It is additionally provided with third inlet opening (16) on the outer wall of the outermost cylinder body (1), the 6th cavity (18) passes through described the
Three inlet openings (16) are in communication with the outside, and hydraulic oil enters the 6th cavity (18) by the third inlet opening (16).
5. multi-stage expansion hydraulic mechanism according to claim 4, which is characterized in that the pedestal of the outermost cylinder body (1)
(53) first raised (51), described first raised (51) and the second valve opening for being in outermost central housing (2) are equipped with
(50) position is corresponding.
6. multi-stage expansion hydraulic mechanism according to claim 4, which is characterized in that the second valve of the central housing (2)
The top of door (13) is equipped with second raised (52), described second raised (52) and adjacent the second valve opening (50) or the first valve opening
(36) position is corresponding.
7. multi-stage expansion hydraulic mechanism according to claim 4, which is characterized in that the multi-stage expansion hydraulic mechanism into
Fluid path diameter includes oil inlet pipe (54) and the first hydraulic oil entrance (39), and the first hydraulic oil entrance (39) passes through oil inlet pipe
(54) it is connected to the third inlet opening (16) with the 6th cavity (18).
8. multi-stage expansion hydraulic mechanism according to claim 4, which is characterized in that the multi-stage expansion hydraulic mechanism returns
Fluid path diameter include be set on first guide sleeve (4) hole for back flow (11), be formed in casing walls at different levels return liquid access with
And the gap between adjacent two-stage cylinder；Wherein, one end of the hole for back flow (11) is connected to the third cavity (22), described
Gap between the other end of hole for back flow (11) and first cylinder body (3) and the second cylinder body (7) is connected to.
9. multi-stage expansion hydraulic mechanism according to claim 8, which is characterized in that it further include seal plug, the sealing
Plug is set to the distal end in the gap between adjacent two-stage cylinder.
10. a kind of hydraulic support, which is characterized in that including the multi-stage expansion hydraulic mechanism any in claim 5~9,
Column cap (8),
The column cap (8) is fixedly connected on the distal end of second cylinder body (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610323894.7A CN107387491B (en) | 2016-05-16 | 2016-05-16 | Double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610323894.7A CN107387491B (en) | 2016-05-16 | 2016-05-16 | Double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support |
Publications (2)
| Publication Number | Publication Date |
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| CN107387491A CN107387491A (en) | 2017-11-24 |
| CN107387491B true CN107387491B (en) | 2018-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610323894.7A Expired - Fee Related CN107387491B (en) | 2016-05-16 | 2016-05-16 | Double-action hydraulic mechanism, multi-stage expansion hydraulic mechanism and hydraulic support |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108643947B (en) * | 2018-04-26 | 2019-07-02 | 郑州煤矿机械集团股份有限公司 | With crossing liquid deep hole and into the column outer cylinder manufacturing method of return hydraulic control valve seat |
| CN110159612A (en) * | 2019-06-26 | 2019-08-23 | 三一重型装备有限公司 | Telescoping cylinder and telescope support |
| CN111503088B (en) * | 2020-05-07 | 2022-04-29 | 山东万通液压股份有限公司 | Single-telescopic thrust multiplication hydraulic cylinder |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE655844A (en) * | 1963-11-29 | 1965-03-16 | ||
| JP2850281B2 (en) * | 1994-03-18 | 1999-01-27 | 日本機械工業株式会社 | Two-stage cylinder |
| DE29616034U1 (en) * | 1996-09-14 | 1997-01-02 | Mohrmann, Michael, Dipl.-Ing., 47625 Kevelaer | Multi-stage hydraulic cylinder with stroke measuring system |
| US6450083B1 (en) * | 2001-01-22 | 2002-09-17 | Dawson Hydraulics Inc. | Telescopic hydraulic hoist |
| CN201391506Y (en) * | 2009-03-26 | 2010-01-27 | 济南东奥自控技术有限公司 | Multilevel difunctional hydraulic cylinder |
| CN102562709B (en) * | 2011-12-30 | 2015-01-21 | 湖南特力液压有限公司 | Difunctional synchronous telescopic type multistage hydraulic cylinder and hydraulic device |
| CN203023169U (en) * | 2012-12-30 | 2013-06-26 | 蚌埠液力机械有限公司 | Synchronous secondary telescopic cylinder |
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