CN201159259Y - Damping vibration-reduction device of hydraulic cylinder - Google Patents

Damping vibration-reduction device of hydraulic cylinder Download PDF

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Publication number
CN201159259Y
CN201159259Y CNU2008200555857U CN200820055585U CN201159259Y CN 201159259 Y CN201159259 Y CN 201159259Y CN U2008200555857 U CNU2008200555857 U CN U2008200555857U CN 200820055585 U CN200820055585 U CN 200820055585U CN 201159259 Y CN201159259 Y CN 201159259Y
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CN
China
Prior art keywords
piston
left end
piston rod
cylinder
cavity
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Expired - Fee Related
Application number
CNU2008200555857U
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Chinese (zh)
Inventor
王英杰
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Priority to CNU2008200555857U priority Critical patent/CN201159259Y/en
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Publication of CN201159259Y publication Critical patent/CN201159259Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Fluid-Damping Devices (AREA)

Abstract

The utility model relates to a hydraulic cylinder vibration absorber of a strip steel cool rolling mill, in particular to a hydraulic cylinder damping vibration absorber, which comprises a cylinder block, a cylinder head, a piston and a piston rod. A cavity is formed by fixedly connecting the right end of the cylinder block to the cylinder head, an opening is arranged on the cylinder head, and the piston is arranged inside the cavity to divide the cavity into a left portion and a right portion. A bumping is arranged at the left end of the piston, and a groove engaged with the bumping arranged at the left end of the piston is arranged on the inner wall of the cylinder block left end. The piston comprises a piston body and a piston cover, wherein a cavity is formed by fixedly connecting the piston body right end to the piston cover, an opening is arranged on the piston cover, the left end of the piston rod is in stepped shape and covered in the cavity, an elastic damping body is filled between the left end of the piston rod and the inner wall of the piston body, the right end of the piston rod penetrates sequentially the opening of the piston cover and the opening of the cylinder head to be connected with the external. Further, a bumping is disposed at the left end of the piston rod, and a groove engaged with the bumping disposed at the left end of the piston rod is arranged on the inner wall of the left end of the piston body. The hydraulic cylinder vibration absorber of a strip steel cool rolling mill has a simple structure and convenient installation, which is safe and reliable.

Description

The oil hydraulic cylinder damping device
Technical field
The utility model relates to cold strip mill oil hydraulic cylinder vibration damping equipment, relates in particular to the oil hydraulic cylinder damping device that is used for cold strip mill balance and roller system.
Background technique
Cold rolling mill is the equipment of most critical during the band steel is produced, and its equipment state is directly connected to quality of product.Cold rolling mill is arranged by unit and is divided into single chassis reversable mill, two-shipper frame tandem rolling, five frame tandem rollings etc., although cold rolling mill is of a great variety, it is a lot of to produce the product object, but all have some essentially identical functions, as hydraulic pressure depress, hydraulic bending roll, hydro-cushion etc., its production process relates to a plurality of ambits such as material, machinery, electric, hydraulic pressure, computer, and vibration problem all is inevitable when producing.
Since cold rolling mill be a heavy duty, at a high speed, baroque equipment, vibrative reason is very complicated, no matter is designing technique, production Technology or operating technology, all can not fundamentally solve the rolling mill vibration problem.In addition, to the requirement of quality of product, promptly performance assessment criteria such as the thickness and precision of product, plate shape precision is more and more higher.The vibration problem that produces in the operation of rolling becomes the key factor that has a strong impact on quality of product and output undoubtedly.
The mill balancing device generally is divided into three kinds, i.e. spring balancing, counterweight balance and hydro-cushion.For the cold rolling mill balance sysmte, method in common is to adopt the mode of hydro-cushion in the world.
With the oil hydraulic cylinder is example, and referring to Fig. 1, a kind of oil hydraulic cylinder vibration damping equipment comprises cylinder body 1, cylinder cap 2, piston 3, piston rod 6, and cylinder body 1 right-hand member is by bolt 10 and cylinder cap 2 affixed formation cavitys.Piston 3 is arranged in the cavity, and cavity is divided into left and right two-part, and left-half is a control chamber 8, and right half part is a back pressure cavity 9.Piston 3 left ends are provided with projection, and cylinder body 1 left end inwall has the groove that matches with piston 3 left end projections, are used to limit piston 3 limit on the left positions (being the limes superiors position); Piston 3 right-hand members and affixed being connected as a single entity of piston rod 6 left ends, and piston rod 6 left ends are step-like, are used to limit piston 3 limit on the right-right-hand limit positions (being the limit inferior position).Have opening on the cylinder cap 2, piston rod 6 right-hand members pass cylinder cap 2 openings and link to each other with the outside.
Though this structure can play certain damping effect, need the special messenger that it is managed and safeguards, key is the high pressure of hydraulic system, and system stiffness is bigger, and the problems such as vibration in the operation of rolling are not had damping function, and promptly cold rolling mill belongs to the underdamping system.
Another kind of structure is to adopt to open damping hole on oil hydraulic cylinder, measure such as orifice valve is set increases the system damping ratio, though can reduce rolling mill vibration, but will be by device structure being improved or increase equipment, related change workload is big, expense is many and time-consuming, and need carry out structural adjustment to existing equipment, this intensity to equipment has a significant impact.Therefore,, press for and a kind ofly can reduce rolling mill vibration, can not influence the vibration damping equipment of existing equipment structure again for the cold rolling of strip steel machine equipment.
The model utility content
The purpose of this utility model is to provide a kind of oil hydraulic cylinder damping device, and this device can reduce the vibration of cold rolling mill on the basis that does not influence the existing equipment structure, increases the system damping ratio, and it is simple in structure, and is easy for installation, safe and reliable.
The utility model is achieved in that
A kind of oil hydraulic cylinder damping device comprises cylinder body, cylinder cap, piston, piston rod, the affixed formation cavity of cylinder body right-hand member and cylinder cap, and piston is arranged in the cavity, and cavity is divided into left and right two-part; The piston left end is provided with projection, and cylinder body left end inwall has the groove that matches with piston left end projection; The piston right-hand member is connected with the piston rod left end, and the piston rod left end is step-like; Have opening on the cylinder cap, the piston rod right-hand member passes the cylinder cap opening and links to each other with the outside; Piston comprises piston body, piston cap, and the affixed formation cavity of piston body right-hand member and piston cap has opening on the piston cap, and the piston rod left end tips upside down in the cavity, and has the gap between piston rod left end and the piston body inwall, is filled with elastic colloid in the gap; The piston rod right-hand member passes the opening of piston cap successively, the opening of cylinder cap links to each other with the outside.
Described piston rod left end is provided with projection, and piston body left end inwall has the groove that matches with piston rod left end projection.
Between described piston cap opening and the piston rod seal ring is housed.
Described elastic colloid is the high polymerization degree linear polysiloxane.
The utility model is on the basis that does not influence the existing equipment structure, piston in hydraulic cylinder is partly improved, the piston and the piston rod that originally were connected as a single entity are divided into two-part, and in the airtight chamber of piston and in the gap between the piston rod head, be provided with elastic colloid, the vibrational energy that occurs in the characteristic absorption operation of rolling by elastic colloid, thereby reduce the vibration of cold rolling mill, improve its stability.This apparatus structure is simple, and is easy for installation, safe and reliable.
Description of drawings
Fig. 1 is existing oil hydraulic cylinder damping device structure schematic representation;
Fig. 2 is the utility model oil hydraulic cylinder damping device structural representation;
Structural representation when Fig. 3 is in the limit on the left position for the utility model;
Structural representation when Fig. 4 is in the limit on the right-right-hand limit position for the utility model.
Among the figure: 1 cylinder body, 2 cylinder caps, 3 pistons, 4 piston bodies, 5 piston cap, 6 piston rods, 7 elastic colloids, 8 control chambers, 9 back pressure cavity, 10 bolts, 11 countersunk screws.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Referring to Fig. 2, a kind of oil hydraulic cylinder damping device comprises cylinder body 1, cylinder cap 2, piston, piston rod 6, elastic colloid 7.Cylinder body 1 right-hand member has opening by bolt 10 and cylinder cap 2 affixed formation cavitys on the cylinder cap 2.Piston is arranged in the cavity, and cavity is divided into left and right two-part, and left-half is a control chamber 8, and right half part is a back pressure cavity 9.
Piston comprises piston body 4, piston cap 5, and piston body 4 right-hand members have on the piston cap 5 and the corresponding opening of cylinder cap 2 aperture positions by countersunk screw 11 and piston cap 5 affixed formation cavitys.
Piston rod 6 left ends are step-like, tip upside down in the cavity, and be provided with elastic colloid 7 between piston rod 6 left ends and piston body 4 inwalls.Elastic colloid 7 is the high polymerization degree linear polysiloxane---mixed milling type silicon rubber and alkyl silicone oil.Wherein, silicone rubber is mainly methyl silicone rubber, methyl vinyl silicone rubber and methyl phenyl vinyl silicone rubber, and alkyl silicone oil is mainly dimethicone and methyl phenyl silicone oil (phenyl content is little).The vibrational energy that occurs in the characteristic absorption operation of rolling by elastic colloid 7, thereby the vibration of minimizing cold rolling mill.
Piston rod 6 right-hand members pass the opening of piston cap 5 successively, the opening of cylinder cap 2 links to each other with the outside, and between piston cap 5 openings and the piston rod 6 seal ring are housed, and with the enhanced leaktightness effect, prevent that elastic colloid 7 from leaking outside.
Piston rod 6 left ends are provided with projection, and piston body 4 left end inwalls have the groove that matches with piston rod 6 left end projections.Referring to Fig. 4, when piston was in the limit on the right-right-hand limit position, the groove that has on piston rod 6 left end projections and the piston body 4 left end inwalls contacted, and can avoid the infringement of 6 direct 4 causes of percussion piston body of piston rod to piston body 4.
Same reason, the piston left end is provided with projection, and cylinder body 1 left end inwall has the groove that matches with piston left end projection.Referring to Fig. 3, when piston is in the limit on the left position, can prevent that piston from directly clashing into cylinder body 1, make problems such as cylinder body 1 cracks, scuffing of cylinder bore.
The utility model oil hydraulic cylinder damping device is work like this:
Referring to Fig. 2, when the utility model proper functioning, the piston that is made of piston body 4 and piston cap 5 is in the cavity medium position that cylinder body 1 and cylinder cap 2 are formed, is in pressure balance between control chamber 8 and the back pressure cavity 9 at this moment.
When the pressure of back pressure cavity 9 during greater than control chamber 8, back pressure cavity 9 internal pressures are delivered to piston and piston rod 6.Piston is under the effect of back pressure cavity 9 pressure, move to left end, owing to fill the damping function of elastic colloid 7 between piston and the piston rod 6, piston rod 6 can produce displacement in piston, this moment, part elastic colloid 7 was by the gap reverse flow between piston and the piston rod 6, piston that produces owing to piston rod 6 moves with filling and the space between the piston rod 6.Gap between piston and the piston rod 6 is equivalent to damping hole, and elastic colloid 7 has higher viscosity, so the reverse flow of elastic colloid 7 certainly will consume a large amount of vibrational energies, thereby plays the damping to rolling mill vibration.When back pressure cavity 9 internal pressures were enough big, piston and piston rod 6 were in the oil hydraulic cylinder high order end, i.e. oil hydraulic cylinder limit on the left position.At this moment, the contact grooves that piston left end projection and cylinder body 1 left end inwall have referring to Fig. 3, can prevent that piston from directly clashing into cylinder body 1, makes problems such as cylinder body 1 cracks, scuffing of cylinder bore.
Same principle, when the pressure of control chamber 8 during greater than back pressure cavity 9, control chamber 8 internal pressures are delivered to piston and piston rod 6.Piston moves to right-hand member under the effect of control chamber 8 pressure, and part elastic colloid 7 is by the gap reverse flow between piston and the piston rod 6, to fill owing to piston rod 6 moves the piston that produces and the space between the piston rod 6.When control chamber 8 internal pressures are enough big, the contact grooves that piston rod 6 left end projections and piston body 4 left end inwalls have, and piston and piston rod 6 be in the oil hydraulic cylinder low order end, i.e. oil hydraulic cylinder limit on the right-right-hand limit position is referring to Fig. 4.
The utility model oil hydraulic cylinder damping device is simple in structure, and is easy for installation, safe and reliable.

Claims (4)

1. an oil hydraulic cylinder damping device comprises cylinder body, cylinder cap, piston, piston rod, the affixed formation cavity of cylinder body right-hand member and cylinder cap, and piston is arranged in the cavity, and cavity is divided into left and right two-part; The piston left end is provided with projection, and cylinder body left end inwall has the groove that matches with piston left end projection; The piston right-hand member is connected with the piston rod left end, and the piston rod left end is step-like; Have opening on the cylinder cap, the piston rod right-hand member passes the cylinder cap opening and links to each other with the outside;
It is characterized in that: piston comprises piston body, piston cap, the affixed formation cavity of piston body right-hand member and piston cap has opening on the piston cap, the piston rod left end tips upside down in the cavity, and there is the gap between piston rod left end and the piston body inwall, is filled with elastic colloid in the gap; The piston rod right-hand member passes the opening of piston cap successively, the opening of cylinder cap links to each other with the outside.
2. oil hydraulic cylinder damping device according to claim 1 is characterized in that: the piston rod left end is provided with projection, and piston body left end inwall has the groove that matches with piston rod left end projection.
3. oil hydraulic cylinder damping device according to claim 1 and 2 is characterized in that: between piston cap opening and the piston rod seal ring is housed.
4. oil hydraulic cylinder damping device according to claim 1 is characterized in that: elastic colloid is the high polymerization degree linear polysiloxane.
CNU2008200555857U 2008-02-20 2008-02-20 Damping vibration-reduction device of hydraulic cylinder Expired - Fee Related CN201159259Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU2008200555857U CN201159259Y (en) 2008-02-20 2008-02-20 Damping vibration-reduction device of hydraulic cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU2008200555857U CN201159259Y (en) 2008-02-20 2008-02-20 Damping vibration-reduction device of hydraulic cylinder

Publications (1)

Publication Number Publication Date
CN201159259Y true CN201159259Y (en) 2008-12-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CNU2008200555857U Expired - Fee Related CN201159259Y (en) 2008-02-20 2008-02-20 Damping vibration-reduction device of hydraulic cylinder

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105386729A (en) * 2015-11-03 2016-03-09 河北博路天宝石油设备制造有限公司 Sucker rod shock absorber with adjustable damping value

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105386729A (en) * 2015-11-03 2016-03-09 河北博路天宝石油设备制造有限公司 Sucker rod shock absorber with adjustable damping value

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20081203

Termination date: 20140220