CN108916292A - The thin wall small hole formula multistage hydraulic buffer of gas reset - Google Patents

The thin wall small hole formula multistage hydraulic buffer of gas reset Download PDF

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Publication number
CN108916292A
CN108916292A CN201810870070.0A CN201810870070A CN108916292A CN 108916292 A CN108916292 A CN 108916292A CN 201810870070 A CN201810870070 A CN 201810870070A CN 108916292 A CN108916292 A CN 108916292A
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CN
China
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plunger
level
level plunger
hydraulic
thin wall
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CN201810870070.0A
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Chinese (zh)
Inventor
朱明�
丁晓红
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上海理工大学
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Priority to CN201810870070.0A priority Critical patent/CN108916292A/en
Publication of CN108916292A publication Critical patent/CN108916292A/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32Details
    • F16F9/3207Constructional features
    • F16F9/3214Constructional features of pistons
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16FSPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/06Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
    • F16F9/08Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
    • F16F9/084Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall comprising a gas spring contained within a flexible wall, the wall not being in contact with the damping fluid, i.e. mounted externally on the damper cylinder

Abstract

The present invention relates to a kind of thin wall small hole formula multistage hydraulic buffer of gas reset, third level plunger, which slides axially, is inserted into the hydraulic cylinder, and is equipped with oil-through-hole in the bottom of third level plunger, and hydraulic oil is made to flow into hydraulic cylinder from third level plunger;Second level plunger, which slides axially, is inserted into the third level plunger, and is equipped with oil-through-hole in the bottom of second level plunger, and hydraulic oil is made to flow into third level plunger from second level plunger;First order plunger, which slides axially, is inserted into the second level plunger;Accumulator is connected to hydraulic cylinder by hydraulic pipeline, has longitudinal and circumferentially distributed throttling pore on cylinder wall on the inside of second level plunger, third level plunger and hydraulic cylinder.By the throttling action of throttle orifice and the accumulation of energy effect of accumulator, reaches buffering and absorb the function of impact.Energy is released stress by accumulator when reset, realizes reset function.Due to using multistage cylinder body structure, plunger height can be effectively reduced, easy to process and installation is processed.

Description

The thin wall small hole formula multistage hydraulic buffer of gas reset

Technical field

The present invention relates to a kind of hydraulic bjuffer, especially a kind of multistage hydraulic buffer.

Background technique

Traditional single-stage hydraulic buffer mainly uses torus knot discharge orifice-tapered rod structure type.This hydraulic bjuffer Height and volume determine by cushion stroke, and cushion stroke be it is square directly proportional to impact velocity, impact velocity is bigger, stroke Longer, the height of hydraulic bjuffer is higher, so that the processing of buffer, installation and transport difficulty greatly increase.Therefore, in height The impact occasion of speed and heavy duty, is usually considered as multistage hydraulic buffer.In multi-stage buffer, in order to shorten height gauge Very little, Chinese invention patent CN101597003A discloses a kind of hydraulic buffer of elevator, and the plunger of the buffer to overlap with one heart Mode be arranged, and can stretch, be resetted by the spring that cylinder base is arranged in above-below direction.Above-mentioned multi-stage buffer It is all using spring reset, after buffering, spring still has the waste for highly and causing buffer height.And spring meeting Certain difficulty is caused to the installation of buffer.Chinese invention patent CN 103935862A discloses a kind of three-level hydraulic cushion Device.The buffer is arranged in a manner of overlapping with one heart, and throttle orifice-tapered rod is arranged in third level plunger, remaining two-stage column Plug is separately positioned in the second level and first order plunger in the form of determining throttle orifice.The cushion performance of above-mentioned buffer cannot be by It is designed according to entire cushion stroke, cushion performance design can only be carried out to partial buffer stroke, cushion stroke cannot be carried out It is preferable to utilize.

Summary of the invention

The present invention is directed to the deficiencies in the prior art, provides a kind of in high speed, gas reset under case of heavy load The multistage hydraulic buffer of thin wall small hole formula, height and ruler can not be reduced in high-speed overload by solving existing hydraulic bjuffer It is very little, processing and manufacturing, transport difficult the problems such as;The buffer replaces the reset of spring realization plunger by using accumulator, can Flexible installing field for Grand Equipments such as express elevator drop protection, marine large-scale wind driven generators.

The present invention is achieved by the following technical solutions.

A kind of thin wall small hole formula multistage hydraulic buffer of gas reset, including:Hydraulic cylinder filled with hydraulic oil, Level-one plunger, second level plunger, third level plunger, the accumulator filled with gas, the third level plunger slide axially slotting Enter the hydraulic cylinder, and be equipped with oil-through-hole in the bottom of third level plunger, hydraulic oil is made to flow into hydraulic cylinder from third level plunger Body;The second level plunger, which slides axially, is inserted into the third level plunger, and is equipped with oil-through-hole in the bottom of second level plunger, Hydraulic oil is set to flow into third level plunger from second level plunger;The first order plunger, which slides axially, is inserted into the second level column Plug;The accumulator is set to the side of hydraulic cylinder, and is connected to hydraulic cylinder by hydraulic pipeline, the second level plunger, Longitudinal and circumferentially distributed throttling pore is had on cylinder wall on the inside of third level plunger and hydraulic cylinder.

Further, sealing mechanism is equipped between the first order plunger and second level plunger;The second level plunger and Sealing mechanism is equipped between three-level plunger;Sealing mechanism is equipped between the third level plunger and hydraulic cylinder.

Further, the first order plunger head is equipped with cushion.

Further, the throttling pore being distributed on cylinder wall on the inside of the second level plunger, third level plunger and hydraulic cylinder Length and diameter ratio≤0.5, i.e. thin wall small hole.

Further, air bag is equipped in the accumulator;In buffering course, the inert gas in the air bag is by hydraulic oil Compression, to absorb impact and storage energy, the gas pressure in air bag increases;In reseting procedure, it is discharged into accumulator Hydraulic oil pushed back in hydraulic cylinder by the high pressure gas in accumulator so that third level plunger, second level plunger and the first order Plunger moves upwards, and completes to reset.

Further, in buffering course, the hydraulic oil in the second level plunger in the cylinder body of inside passes through thin wall small hole stream Enter in the cylinder body of outside, and is entered in third level plunger by oil-through-hole;Hydraulic oil in the third level plunger in the cylinder body of inside It is flowed into the cylinder body of outside by thin wall small hole, and is entered in hydraulic cylinder by oil-through-hole;Inside cylinder body in the hydraulic cylinder In hydraulic oil flowed into the cylinder body of outside by thin wall small hole, and entered in accumulator by oil-through-hole.

Further, the thin wall small hole in the second level plunger throttling the gross area with first order plunger compression travel Increase and be gradually reduced.

Further, the throttling gross area of the thin wall small hole of the third level plunger with second level plunger compression travel Increase and is gradually reduced.

Further, the thin wall small hole of the hydraulic cylinder throttling the gross area with the compression travel of third level plunger increasing Add and is gradually reduced.

Compared with prior art, the present invention has following technical characterstic:

The present invention realizes the buffering under high speed, case of heavy load using thin wall small hole throttling and by compressed inert, and With the increase of compression travel, the area of throttle orifice is to be gradually reduced, and cushion effect gradually increases, and by straight to throttle orifice The design of diameter, the cushion performance of hydraulic bjuffer are controllable.Compared with patent CN 103935862A, entire buffering course is equal The controllability of entire buffering course can be realized by designing the diameter of throttle orifice, improve the resiliency of buffer well Can, and the relative motion of plunger at different levels is controllable.Compared with patent CN101597003A, after buffering, buffer Height can be reduced to the 1/3 of no load condition, be effectively reduced in size from structure, convenient for plunger and cylinder body processing and Transport.In addition, buffer is using accumulator come the part kinetic energy during store buffer, absorbable oil shock and oil pressure wave It is dynamic, keep the stationarity of whole process.

Detailed description of the invention

Fig. 1 is the cross-sectional view of the no load condition of multistage hydraulic buffer of the invention;

Fig. 2 is multistage hydraulic buffer by the cross-sectional view of total travel compressive state;

Fig. 3 is the state cross-sectional view during first order ram compression;

Fig. 4 is the state cross-sectional view during the ram compression of the second level;

Fig. 5 is the state cross-sectional view during third level ram compression;

Fig. 6 is state cross-sectional view of the multistage hydraulic buffer in reseting procedure;

Fig. 7 is second level plunger oil-through-hole location map;

Fig. 8 is third level plunger oil-through-hole location map;

Fig. 9 is the relational graph of the opening area of the first/bis-/three-level plunger displacement and throttle orifice;

Figure 10 is the schematic diagram of the first/bis-/three-level plunger throttling pore size distribution;

In figure:1- cushion;2- first order plunger;The second level 3- plunger cavity;The second level 4- plunger exocoel;5- third level plunger Inner cavity;6- third level plunger exocoel;7- inner chamber of cylinder block;8- cylinder body exocoel;9- hydraulic pipeline;10- accumulator;11- first order column Fill in throttle orifice;12- first order plunger oil-through-hole;The second level 13- plunger throttle orifice;The second level 14- plunger oil-through-hole;15- is hydraulic Cylinder body throttle orifice;The hydraulic oil-through-hole of 16-.

Specific embodiment

It elaborates below to the embodiment of the present invention:The present embodiment carries out under the premise of the technical scheme of the present invention Implement, the detailed implementation method and specific operation process are given.It should be pointed out that those skilled in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention Protect range.

Please refer to Fig. 1 to Figure 10.

The implementation case provides a kind of thin wall small hole formula multistage hydraulic buffer of gas reset, including such as lower component:

It is filled with the hydraulic cylinder of hydraulic oil;

It is filled with the accumulator of inert gas, the accumulator is set to the side of hydraulic cylinder, accumulator and hydraulic cylinder Between be connected by hydraulic pipeline;The accumulator can make third level plunger, second level plunger and after removing load Level-one plunger returns to the position of no load condition;

The inside cylinder body being erected in the plunger of the second level is provided with the throttling pore changed according to certain rules on the casing wall of inside, such as Shown in Fig. 9 and Figure 10.

It is small to be provided with the throttling changed according to certain rules on the casing wall of inside for the inside cylinder body being erected in third level plunger Hole, as shown in Figure 9 and Figure 10.

The inside cylinder body being erected in hydraulic cylinder is provided with the throttling pore changed according to certain rules on the casing wall of inside, As shown in Fig. 9 and Figure 10.

Third level plunger, the third level plunger are axially slidably inserted into above-mentioned hydraulic cylinder;

Second level plunger, the second level plunger are axially slidably inserted into above-mentioned third level plunger, and in second level column The bottom of plug is equipped with the oil-through-hole of annular distribution;

First order plunger, the first order plunger are axially slidably inserted into above-mentioned second level plunger, and in first order column The bottom of plug is equipped with the oil-through-hole of annular distribution;

The successively sealing socket with one heart from the bottom to top of the hydraulic cylinder, third level plunger, second level plunger and first order plunger, shape At hydraulic mechanism, hydraulic oil is filled with inside the hydraulic mechanism.

Further, the first order plunger head is equipped with cushion.

Further, the throttle hole area(The sum of thin wall small hole area)Gradually subtract with the increase of compression travel It is small.

Further, the area of throttle orifice and magnitude of load, the acceleration magnitude of buffering course, compression travel and cylinder Body/plunger cross-sectional area is related, therefore the diameter of thin wall small hole needs are specifically designed according to cushion performance requirement.

Further, in buffering course, hydraulic oil in the inside cylinder body of second level plunger can only by throttle orifice into Enter the outside cylinder body of second level plunger, and third level cylinder body is entered by oil-through-hole 12;In the inside cylinder body of third level plunger Hydraulic oil can only enter the outside cylinder body of third level plunger by throttle orifice, and enter cylinder body by oil-through-hole 14;Cylinder body it is interior Hydraulic oil in the cylinder body of side can only enter the exterior measuring cylinder body of cylinder body by throttle orifice, and be entered in accumulator by oil-through-hole 16; And enter in reseting procedure after removing load, the hydraulic oil being discharged into accumulator can be by oil-through-hole and throttle orifice cylinder Body, then pass sequentially through oil-through-hole and throttle orifice respectively enters third level plunger and second level plunger, realize the reset of plunger.

Further, the air bag that can be expanded and shrink is equipped with inside the accumulator.In buffering course, compressing gasbag Interior inert gas, to absorb impact and storage energy;Impact load removal after, air bag under the action of high pressure gas, Hydraulic oil is pushed back in cylinder body, to realize the reset of third level plunger, second level plunger and first order plunger.

Further, sealing mechanism is equipped between the first order plunger and second level plunger;Second level plunger and Sealing mechanism is equipped between three-level plunger;Sealing mechanism is equipped between third level plunger and cylinder body;

The present embodiment is specially:

As shown in Figure 1, the multistage thin wall small hole hydraulic bjuffer for the gas reset that the implementation case provides, including hydraulic cylinder, Accumulator 10, first order plunger 2, second level plunger, third level cylinder body, hydraulic pipeline.Wherein first order plunger, second level column Plug, third level plunger can be entrenched in hydraulic cylinder in above-below direction, and the diameter of the three-level plunger sequentially reduces from outside to inside, and And overlapping setting in concentric manner between each other.

Second level plunger is made of inside cylinder body 3 and outside cylinder body 4.Third level plunger is by inside cylinder body 5 and outside cylinder body 6 Composition.Hydraulic cylinder is made of interior survey cylinder body 7 and outside cylinder body 8.Wherein, from first order plunger, second level plunger, third level column Plug hydraulic oil in compression process is entered in accumulator 10 by pipeline 9, and the inert gas in compression accumulator 10.

The bottom of second level plunger is equipped with oil-through-hole 12, and 12 annular spread of oil-through-hole is in second level plunger base, such as Fig. 7 It is shown, and hydraulic oil is full of in the second level plunger.Hydraulic oil in the plunger of the second level acts on the bottom of first order plunger 2 Portion enables first order plunger 2 fully extended, and the first order plunger 2 is slided up and down.The bottom of third level plunger Portion is equipped with oil-through-hole 14, and hydraulic oil is full of in the third level plunger.Hydraulic oil in third level plunger acts on second The bottom of grade plunger, enables second level plunger fully extended, and the second level plunger is slided up and down.Hydraulic cylinder Be full of hydraulic oil in vivo, and act on the bottom of third level plunger, enable third level plunger fully extended, and make this Three-level plunger can slide up and down.

In the hydraulic bjuffer 10, with the decline of first order plunger 2, hydraulic oil in the inside cylinder body of second level plunger Enter the outside cylinder body 4 of second level plunger by thin wall small hole 11, throttling is generated by thin wall small hole 11 due to hydraulic oil at this time Effect generates very big resistance to the first order plunger 2 of decline, impact kinetic energy is consumed, to obtain buffering effect.While with The decline of first order plunger 2, throttle hole area are gradually reduced, and resistance will be gradually increased, and corresponding result is exactly load Speed will be gradually reduced, and the decrease speed of first order plunger 2 will reduce.With the decline of first order plunger 2, section hydraulic Oil enters the cavity formed between cylinder body on the inside of first order plunger 2 and second level plunger by thin wall small hole 11, forms section again Flow effect.

While first order plunger 2 declines, due to pressure difference relationship, second level plunger also starts to move downward.The third level Hydraulic oil in the inside cylinder body of plunger enters the outside cylinder body 6 of third level plunger by thin wall small hole 13, at this time due to hydraulic Oil generates restriction effect by thin wall small hole 13, generates very big resistance to the second level plunger of decline, consumes impact kinetic energy, from And obtain buffering effect.Simultaneously as the decline of second level plunger, throttle hole area are gradually reduced, resistance will be will increase, right The result answered is exactly that the decrease speed of second level plunger will reduce, until speed is zero.With the decline of second level plunger, portion Liquid separation pressure oil enters the cavity formed between cylinder body on the inside of second level plunger and third level plunger by thin wall small hole 13, again shape At restriction effect.

While second level plunger declines, due to pressure difference relationship, third level plunger also starts to move downward.Hydraulic cylinder Hydraulic oil in the cylinder body of inside enters the outside cylinder body 8 of hydraulic cylinder by thin wall small hole 15, at this time due to hydraulic oil pass through it is thin Wall aperture 15 generates restriction effect, generates very big resistance to the third level plunger of decline, impact kinetic energy is consumed, to be delayed Rush effect.Simultaneously as the decline of third level plunger, throttle hole area are gradually reduced, resistance will be will increase, corresponding result It is exactly that the decrease speed of third level plunger will reduce, until speed is zero.With the decline of third level plunger, section hydraulic oil Enter the cavity formed between cylinder body on the inside of third level plunger and hydraulic cylinder by thin wall small hole 15, forms throttling effect again Fruit.Meanwhile the hydraulic oil in the outside cylinder body 8 of hydraulic cylinder enters accumulator 10, compressed inert, storage by oil-through-hole 16 The reset deposited and absorb part impact kinetic energy for plunger.

When reset, i.e., after removal load, the hydraulic fluid pressure in accumulator 10 is greater than the hydraulic fluid pressure in hydraulic cylinder, Hydraulic oil in accumulator 10 sequentially enters third level plunger by oil-through-hole 14 and oil-through-hole 12, in the plunger of the second level, pushes Plungers at different levels, which are realized, to be resetted.

The movement of the hydraulic bjuffer with above structure is illustrated below.

When the cushion 1 of load and top(Rubber pad can be used)After colliding.Firstly, first order plunger is along The inside inboard wall of cylinder block slide downward of second level plunger, so that the oil liquid pressure in the inside cylinder body of second level plunger increases.It is hydraulic Oil enters the outside cylinder body of second level plunger by the thin wall small hole on the cylinder body of inside, and enters second level column by oil-through-hole 12 Plug.Meanwhile with the decline of first order plunger, section hydraulic oil enters first order plunger and second level plunger by thin wall small hole The cavity formed between the cylinder body of inside, forms restriction effect again.

Then, second level plunger along third level plunger inside inboard wall of cylinder block slide downward so that third level plunger Oil liquid pressure in the cylinder body of inside increases.Hydraulic oil enters the outside cylinder of third level plunger by the thin wall small hole on the cylinder body of inside Body, and hydraulic cylinder is entered by oil-through-hole.Meanwhile with the decline of second level plunger, section hydraulic oil passes through thin wall small hole The cavity formed between cylinder body on the inside of into second level plunger and third level plunger, forms restriction effect again.

Finally, inner wall slide downward of the third level plunger along the inside cylinder body of hydraulic cylinder, so that hydraulic cylinder is interior Oil liquid pressure in the cylinder body of side increases.Hydraulic oil enters the outside cylinder body of hydraulic cylinder by the thin wall small hole on the cylinder body of inside, And accumulator is entered by the oil-through-hole on hydraulic cylinder, under the collective effect of gas pressure and oil liquid pressure, plays and subtract The effect of speed, until speed is zero.With the decline of third level plunger, section hydraulic oil enters third level column by thin wall small hole The cavity formed between cylinder body on the inside of plug and hydraulic cylinder, forms restriction effect again.

When first order plunger completes stroke, the bottom of first order plunger and the bottom of second level plunger will be contacted.This When, above-mentioned two-stage plunger will be moved downwardly together with identical speed.When the second level, plunger is completed to be formed, second level plunger Bottom and the bottom of third level plunger will contact.At this point, three-level plunger will be moved downwardly together with identical speed.If closed Reason adjusts the cross-sectional area and initial oil liquid pressure of plungers at different levels, can reach the case where three-level plunger is completed at the same time stroke.

In entire buffering course, due to the compression of plunger, the area of throttle orifice is gradually reduced, the resistance from hydraulic oil It will be gradually increased, as a result, the decrease speed of weight is slowly dropped to zero.Into lazy in the hydraulic oil compressing gasbag of accumulator Property gas, play the role of buffering and storage energy.In addition, the inert gas pressure in air bag is larger after load removal, it will Hydraulic oil in accumulator is pushed back in hydraulic cylinder by hydraulic pipeline, and successively flows into third level plunger, in the plunger of the second level, Plungers at different levels are pushed to move upwards.

In buffering course, throttle hole area=first order plunger thin wall small hole area+second level plunger thin-walled is defined Aperture area+third level plunger thin wall small hole area.The throttle hole area of plungers at different levels increases with the stroke of plungers at different levels And reduce.In the case that load is with certain velocity collision hydraulic bjuffer, it is assumed that ideal deceleration is certain value.Cause This, the displacement of plungers at different levelsLWith the gross area of thin wall small holeA x Between relationship it is as shown in Figure 9.It is small that thin-walled can be obtained as a result, The diameter in hole.

In the present embodiment:

The thin wall small hole formula multistage hydraulic buffer of gas reset, including being filled with the hydraulic cylinder of hydraulic oil and being filled with lazy Property gas accumulator, slidably can axially be inserted into hydraulic cylinder and bottom be equipped with oil-through-hole third level plunger; It slidably can axially be inserted into third level plunger and be equipped with the second level plunger of oil-through-hole in bottom;It can be slidably along axis The first order plunger of direction insertion second level plunger;Three-level plunger is set to be returned to the accumulator of the position of no load condition.

Thin wall small hole is distributed in the inside cylinder body of second level plunger, third level plunger and hydraulic cylinder, and along height side It is distributed to by Figure 10.

When above-mentioned plunger is compressed, plunger and the intracorporal hydraulic oil of hydraulic cylinder by thin wall small hole and oil-through-hole into Enter accumulator, and act on air bag, and then compressed inert(Such as nitrogen);

Three-level plunger is arranged in hydraulic cylinder in a manner of it can in axial direction stretch, and the diameter of plunger has in outer arrive gradually Reduce, is arranged in concentric manner between each other;

In order to avoid the liquid leakage between three-level plunger, it is equipped between the outer wall of upper level plunger and the inner wall of next stage plunger Sealing device;

In order to avoid the liquid leakage between third level plunger and hydraulic cylinder, in the inner wall and third level plunger of hydraulic cylinder Sealing device is equipped between outer wall;

Oil-through-hole is equipped between the bottom and third level plunger of second level plunger;

Oil-through-hole is equipped between the bottom and hydraulic cylinder of third level plunger;

The top of first order plunger is arranged in above-mentioned cushion.

Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned Particular implementation, those skilled in the art can make various deformations or amendments within the scope of the claims, this not shadow Ring substantive content of the invention.

Claims (9)

1. a kind of thin wall small hole formula multistage hydraulic buffer of gas reset, including:Hydraulic cylinder filled with hydraulic oil, first Grade plunger, second level plunger, third level plunger, the accumulator filled with gas, the third level plunger slide axially insertion The hydraulic cylinder, and it is equipped with oil-through-hole in the bottom of third level plunger, so that hydraulic oil is flowed into hydraulic cylinder from third level plunger; The second level plunger, which slides axially, is inserted into the third level plunger, and is equipped with oil-through-hole in the bottom of second level plunger, makes Hydraulic oil flows into third level plunger from second level plunger;The first order plunger, which slides axially, is inserted into the second level plunger; The accumulator is set to the side of hydraulic cylinder, and is connected to hydraulic cylinder by hydraulic pipeline, it is characterised in that:Described second Longitudinal and circumferentially distributed throttling pore is had on cylinder wall on the inside of grade plunger, third level plunger and hydraulic cylinder.
2. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 1, it is characterised in that:Described Sealing mechanism is equipped between level-one plunger and second level plunger;Sealer is equipped between the second level plunger and third level plunger Structure;Sealing mechanism is equipped between the third level plunger and hydraulic cylinder.
3. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 1, it is characterised in that:Described Level-one plunger head is equipped with cushion.
4. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 1, it is characterised in that:Described The ratio of the length of the throttling pore being distributed on cylinder wall on the inside of second level plunger, third level plunger and hydraulic cylinder and diameter≤ 0.5, i.e. thin wall small hole.
5. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 1, it is characterised in that:The storage Air bag can be equipped in device;In buffering course, the inert gas in the air bag is compressed by hydraulic oil, is impacted and is deposited to absorb Energy storage capacity, the gas pressure in air bag increase;In reseting procedure, the hydraulic oil in accumulator is discharged by the height in accumulator Body of calming the anger pushes back in hydraulic cylinder, so that third level plunger, second level plunger and first order plunger move upwards, completes to reset.
6. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 1, it is characterised in that:It is buffering In the process, the hydraulic oil in the second level plunger in the cylinder body of inside is flowed into the cylinder body of outside by thin wall small hole, and by logical Oilhole enters in third level plunger;Hydraulic oil in the third level plunger in the cylinder body of inside flows into outside cylinder by thin wall small hole In body, and entered in hydraulic cylinder by oil-through-hole;Hydraulic oil in the hydraulic cylinder in the cylinder body of inside passes through thin wall small hole It flows into the cylinder body of outside, and is entered in accumulator by oil-through-hole.
7. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 6, it is characterised in that:Described The throttling gross area of thin wall small hole in second level plunger is gradually reduced with the increase of the compression travel of first order plunger.
8. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 6, it is characterised in that:Described The throttling gross area of the thin wall small hole of three-level plunger is gradually reduced with the increase of the compression travel of second level plunger.
9. the thin wall small hole formula multistage hydraulic buffer of gas reset according to claim 6, it is characterised in that:The liquid The throttling gross area of the thin wall small hole of cylinder pressure body is gradually reduced with the increase of the compression travel of third level plunger.
CN201810870070.0A 2018-08-02 2018-08-02 The thin wall small hole formula multistage hydraulic buffer of gas reset CN108916292A (en)

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CN109838491A (en) * 2019-03-08 2019-06-04 上海理工大学 A kind of multistage hydraulic buffer with tapered rod of gas reset

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CN101597003A (en) * 2008-06-04 2009-12-09 株式会社日立制作所 Hydraulic damper for elevator
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