CN204419758U - A kind of buffering hydraulic cylinder - Google Patents

A kind of buffering hydraulic cylinder Download PDF

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Publication number
CN204419758U
CN204419758U CN201420870538.3U CN201420870538U CN204419758U CN 204419758 U CN204419758 U CN 204419758U CN 201420870538 U CN201420870538 U CN 201420870538U CN 204419758 U CN204419758 U CN 204419758U
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China
Prior art keywords
cylinder
piston
plunger rod
hole
steel ball
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CN201420870538.3U
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Chinese (zh)
Inventor
杜浩斌
陈洁
唐瑞
刘建魁
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CSIC Zhongnan Equipment Co Ltd
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CSIC Zhongnan Equipment Co Ltd
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Priority to CN201420870538.3U priority Critical patent/CN204419758U/en
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Abstract

The utility model discloses a kind of buffering hydraulic cylinder, belong to hydraulic cylinder structure technical field.Wherein, the piston area of piston is processed with two groups of step through-holes, first group of step through-hole is that valve opening installed by steel ball, and steel ball is limited in step hole by baffle ring, and steel ball can move axially in step hole; Another group step hole is variable diameters hole; Plunger rod coordinates with the front end of cylinder body, piston sleeve is contained in one end that plunger rod is positioned at cylinder body, outside piston side face coordinates with the inwall of cylinder body, gland is sleeved on the front-end face of piston, cylinder body is closed by cylinder bottom, inner chamber of cylinder block is separated into two independently cavitys by piston, is bar chamber and rodless cavity respectively, and the cylindrical cavity on rodless cavity and plunger rod is through; The cylindrical cavity of described plunger rod is built with gas piston; The fitting surface of described plunger rod and piston and cylinder body is all provided with Sealing.The utility model does not need to rely on the oil-feed of hydraulic power unit hydraulic control cylinder and fuel-displaced, but can play good buffer function.

Description

A kind of buffering hydraulic cylinder
Technical field
The utility model relates to a kind of buffering hydraulic cylinder, belongs to hydraulic cylinder structure technical field.
Background technique
For oil hydraulic cylinder, especially double-acting hydraulic cylinder, when running fast, general backhaul hourly velocity is all than comparatively fast, thus needs to arrange damping device at end of travel.But due to the restriction by oil hydraulic cylinder inner space, not necessarily can requirement be reached at the cushioning effect of end of travel.Especially when the load of the large quality of Driven by Hydraulic Cylinder, because kinetic energy is excessive, hard hit phenomenon between piston and cylinder bottom, guide sleeve can be produced at end of travel, affect normal service life and the precision of oil hydraulic cylinder greatly.
Model utility content
In view of this, the utility model provides a kind of buffering hydraulic cylinder, does not need to rely on the oil-feed of hydraulic power unit hydraulic control cylinder and fuel-displaced, but can play good buffer function.
A kind of buffering hydraulic cylinder, comprises gas charging valve, plunger rod, cylinder body, Sealing, gas piston, piston, steel ball, baffle ring, gland and cylinder bottom;
One end end face of described plunger rod is processed with cambered surface groove, and this cambered surface groove coordinates with by the vibration position of dampening apparatus, and this end is provided with gas charging valve, and the other end of plunger rod is cylindrical cavity;
The piston area of described piston is processed with two groups of step through-holes, first group of step through-hole is that valve opening installed by steel ball, and steel ball is limited in step hole by baffle ring, and baffle ring and steel ball are mating spherical surfaces, and steel ball can move axially in step hole; Another group step hole is variable diameters hole, and the piston area installing steel ball one end is large diameter hole, and the piston area of the other end is small diameter bore; In addition, piston is also processed one group of throttle orifice;
Its integrated connection closes: described plunger rod coordinates with the front end of cylinder body, described piston sleeve is contained in one end that plunger rod is positioned at cylinder body, outside piston side face coordinates with the inwall of cylinder body, described gland is sleeved on the front-end face of piston, cylinder body is closed by described cylinder bottom, inner chamber of cylinder block is separated into two independently cavitys by described piston, is bar chamber and rodless cavity respectively, and the cylindrical cavity on rodless cavity and plunger rod is through; The cylindrical cavity of described plunger rod is built with gas piston; The fitting surface of described plunger rod and piston and cylinder body is all provided with Sealing.
Further, be filled with inert gas in the cavity airtight by gas piston of described plunger rod, in described cylinder body, be filled with hydraulic oil;
Further, on described cylinder body, the position of corresponding rod chamber is provided with Decompression valves.
Beneficial effect:
(1) the utility model utilizes pressure difference and difference in areas principle, by inert gas the pressure difference that produces by compression, carry out the flow direction of hydraulic control oil, by the pulsation of steel ball with fluid, and the difference in areas of throttle orifice, carry out the uninterrupted of hydraulic control oil, reach the effect of buffering.Its principle is simple, novel structure, easy for installation, use reliable.
(2) the utility model is processed with two kinds of step holes on piston.The step surface of step hole is provided with a steel ball, outside steel ball, has valve seat.Thrust when utilizing hydraulic oil to move, makes steel ball fit with the arc surface on valve seat or be separated, i.e. cut-off valve bore or open valve seat orifice, carrys out the uninterrupted of hydraulic control oil.Another kind of step hole is the through hole of reducing, and when hydraulic oil moves from rod chamber to rodless cavity, step hole changes from small to big, and running of hydraulic power oil speed is comparatively slow, when hydraulic oil moves from rodless cavity to rod chamber, step hole from large to small, running of hydraulic power oil speed.Carry out uninterrupted when hydraulic control oil moves by these two kinds of step holes, reach the object of buffering.Its overall structure is novel, and processing is simple, and easy for installation, using effect is good.
(3) the utility model oil hydraulic cylinder is filled with inert gas and hydraulic oil before use according to a certain percentage respectively, carrys out the oil-feed of hydraulic control cylinder and fuel-displaced without the need to arranging hydraulic power unit.It is easy to use, safeguards simple, clean environment.
(4) plunger rod, piston and valve seat are made split-type structural by the utility model, steel ball is placed with between the step hole of piston and valve seat, utilize the end face of buffer body by seat compression, make hydraulic oil in flow process, steel ball and valve seat can not come off, and its structure is simple, easy for installation, use is reliable and cost is low.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is the structural representation of the utility model original state;
Fig. 3 is the structural representation of the utility model limited compression position;
Fig. 4 is the structural representation of piston in the utility model;
Fig. 5 is the D-D view of Fig. 4;
Fig. 6 is the E-E view of Fig. 4.
Wherein, 1-gas charging valve, 2-plunger rod, 3-cylinder body, 4-Sealing, 5-gas piston, 6-piston, 7-steel ball, 8-baffle ring, 9-gland, 10-cylinder bottom.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, the utility model is described in detail.
As shown in Figure 1, the utility model provides a kind of buffering hydraulic cylinder, comprises gas charging valve 1, plunger rod 2, cylinder body 3, Sealing 4, gas piston 5, piston 6, steel ball 7, baffle ring 8, gland 9, cylinder bottom 10;
One end end face of described plunger rod 2 is processed with cambered surface groove, and this cambered surface groove coordinates with by the vibration position of dampening apparatus, and this end is provided with gas charging valve 1, and the other end of plunger rod 2 is cylindrical cavity;
As shown in accompanying drawing 4,5 and 6, the piston area of described piston 6 is processed with two groups of step through-holes, first group of step through-hole is that valve opening installed by steel ball, and steel ball is limited in step hole by baffle ring 8, baffle ring 8 and steel ball are mating spherical surfaces, and steel ball can move axially in step hole; Another group step hole is variable diameters hole, and the piston area installing steel ball 7 one end is large diameter hole, and the piston area of the other end is small diameter bore; In addition, piston 6 is also processed one group of throttle orifice;
Its integrated connection closes: described plunger rod coordinates with the front end of cylinder body 3, described piston 6 is sleeved on one end that plunger rod is positioned at cylinder body, outside piston side face coordinates with the inwall of cylinder body 3, described gland 9 is sleeved on the front-end face of piston 6, cylinder body 3 is closed by described cylinder bottom 10, cylinder body 3 inner chamber is separated into two independently cavitys by described piston 6, is bar chamber and rodless cavity respectively, and the cylindrical cavity on rodless cavity and plunger rod 2 is through; The cylindrical cavity of described plunger rod 2 is built with gas piston 5; The fitting surface of described plunger rod 2 and piston 6 and cylinder body 3 is all provided with Sealing 4;
Further, be filled with inert gas in the cavity airtight by gas piston 5 of described plunger rod 2, in described cylinder body, be filled with hydraulic oil;
Further, on described cylinder body 3, the position of corresponding rod chamber is provided with Decompression valves.
Working principle: buffering hydraulic cylinder is mainly used in the impact shock produced when absorbing the test of rock drill product impact property.Be filled with a certain proportion of inert gas and hydraulic oil to buffering hydraulic cylinder, and buffering hydraulic cylinder cylinder bottom is fixed.
In buffering course, retract after the cambered surface groove of plunger rod 2 is subject to the impact force of certain frequency, now steel ball is away from valve seat arc surface, valve opening is opened, in rodless cavity, a part of hydraulic oil is moved to rod chamber by the valve opening on piston and throttle orifice, another part hydraulic oil promotes gas piston, is compressed by inert gas, slows down the operation of oil hydraulic cylinder.When piston 6 runs to certain position, buffer body starts the step surface entering into cylinder bottom 10, slows down the motion speed of plunger rod further.
Because inert gas is compressed, there is certain pressure difference in air chamber and hydraulic fluid chamber, and air chamber pressure is greater than hydraulic fluid chamber pressure, when after impact force release suffered by plunger rod 2, gas push gas piston 5, now hydraulic oil will promote piston, make plunger rod 2 outwards movement, and now steel ball 7 and baffle ring 8 arc surface are fitted, baffle ring 8 bore closure, rod chamber hydraulic oil can only be moved to rodless cavity by the throttle orifice on piston 6, therefore slows down the speed of the outside movement of plunger rod 2.When piston 6 moves to certain position, the buffer portion on piston 6 starts the step hole entered in cylinder body, slows down the speed that piston rod outwards runs further.
In sum, these are only preferred embodiment of the present utility model, be not intended to limit protection domain of the present utility model.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.

Claims (3)

1. a buffering hydraulic cylinder, it is characterized in that, comprise gas charging valve (1), plunger rod (2), cylinder body (3), Sealing (4), gas piston (5), piston (6), steel ball (7), baffle ring (8), gland 9, cylinder bottom 10;
One end end face of described plunger rod (2) is processed with cambered surface groove, and this cambered surface groove coordinates with by the vibration position of dampening apparatus, and this end is provided with gas charging valve (1), and the other end of plunger rod (2) is cylindrical cavity;
The piston area of described piston (6) is processed with two groups of step through-holes, first group of step through-hole is that valve opening installed by steel ball, steel ball (7) is limited in step hole by baffle ring (8), baffle ring (8) and steel ball (7) are mating spherical surfaces, and steel ball (7) can move axially in step hole; Another group step hole is variable diameters hole, and the piston area installing steel ball (7) one end is large diameter hole, and the piston area of the other end is small diameter bore; In addition, piston (6) also processes one group of throttle orifice;
Its integrated connection closes: described plunger rod coordinates with the front end of cylinder body (3), described piston (6) is sleeved on one end that plunger rod (2) is positioned at cylinder body (3), piston (6) outer peripheral surface coordinates with the inwall of cylinder body (3), described gland (9) is sleeved on the front-end face of piston (6), cylinder body (3) is closed by described cylinder bottom (10), cylinder body (3) inner chamber is separated into two independently cavitys by described piston (6), be bar chamber and rodless cavity respectively, the cylindrical cavity on rodless cavity and plunger rod (2) is through; The cylindrical cavity of described plunger rod (2) is built with gas piston (5); The fitting surface of described plunger rod (2) and piston (6) and cylinder body (3) is all provided with Sealing (4).
2. buffering hydraulic cylinder as claimed in claim 1, is characterized in that, be filled with inert gas in the cavity airtight by gas piston (5) of described plunger rod (2), described cylinder body is filled with hydraulic oil in (3).
3. buffering hydraulic cylinder as claimed in claim 1 or 2, is characterized in that, the position of the upper corresponding rod chamber of described cylinder body (3) is provided with Decompression valves.
CN201420870538.3U 2014-12-31 2014-12-31 A kind of buffering hydraulic cylinder Active CN204419758U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420870538.3U CN204419758U (en) 2014-12-31 2014-12-31 A kind of buffering hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420870538.3U CN204419758U (en) 2014-12-31 2014-12-31 A kind of buffering hydraulic cylinder

Publications (1)

Publication Number Publication Date
CN204419758U true CN204419758U (en) 2015-06-24

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104564908A (en) * 2014-12-31 2015-04-29 中船重工中南装备有限责任公司 Buffer hydraulic cylinder
CN106594151A (en) * 2016-12-05 2017-04-26 重集团大连设计研究院有限公司 Blanking buffer cylinder based on damping principle

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104564908A (en) * 2014-12-31 2015-04-29 中船重工中南装备有限责任公司 Buffer hydraulic cylinder
CN106594151A (en) * 2016-12-05 2017-04-26 重集团大连设计研究院有限公司 Blanking buffer cylinder based on damping principle

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