CN205918687U - Servo pneumatic cylinder of low friction of high frequency response - Google Patents

Servo pneumatic cylinder of low friction of high frequency response Download PDF

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Publication number
CN205918687U
CN205918687U CN201620729942.8U CN201620729942U CN205918687U CN 205918687 U CN205918687 U CN 205918687U CN 201620729942 U CN201620729942 U CN 201620729942U CN 205918687 U CN205918687 U CN 205918687U
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China
Prior art keywords
piston
cylinder
piston rod
cylinder bottom
static pressure
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CN201620729942.8U
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Chinese (zh)
Inventor
李阳
王超光
于安才
刘兵
徐海洋
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TIANJIN URANUS HYDRAULIC MACHINERY CO Ltd
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TIANJIN URANUS HYDRAULIC MACHINERY CO Ltd
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Abstract

The utility model relates to a servo pneumatic cylinder of low friction of high frequency response, piston rod and piston an organic whole are made, make a plurality of piston equalization tank along piston axial direction interval in the piston outer fringe, and cylinder end and cylinder bottom are close to on the inner edge that the piston just contacted with the piston rod outer fringe all makes a plurality of piston rod equalization tank along piston rod axial direction interval. According to the automatic silicon steel sheet leveling machine of the transformer, set up piston equalization tank on the piston, it supports the groove to set up piston rod equalization tank and static pressure on cylinder end and cylinder bottom, piston equalization tank, piston rod equalization tank and static pressure support the groove and have eliminated the contact seal, the frictional force that produces is supported in the contact, and piston equalization tank, piston rod equalization tank can reduce the yawing force of piston and piston rod, be positioned piston and piston rod middle, a piston, the buffer structure who sets up on cylinder end and the cylinder bottom can avoid piston collision cylinder end and cylinder bottom, fluid can be retrieved to the drain tap that sets up on cylinder end and the cylinder bottom.

Description

A kind of high frequency sound low friction servo hydraulic cylinder
Technical field
This utility model belongs to servo hydraulic cylinder frictional force and response frequency structure technical field of improvement, especially a kind of high Frequency response low friction servo hydraulic cylinder.
Background technology
Normal hydraulic cylinder mainly reciprocating to drive external equipment, and servo hydraulic cylinder more value dynamic property, The parameters such as control accuracy, stability, in traditional servo hydraulic cylinder between piston and cylinder barrel, between piston rod and cylinder head adopt more Conventional contact-type dynamic sealing, the advantage of contact-type dynamic sealing is that good sealing effect, processing and manufacturing required precision be not high, but drawback Be that frictional force is larger, cannot eliminate, such as: in the high accuracy electrohydraulic servo system such as aviation simulator, high-frequency vibrating table it is necessary to Using the servo hydraulic cylinder of micro tribology high frequency sound, this is accomplished by using non-contact type dynamic sealing, and that is, clearance seal and static pressure support Structure, this structure can be effectively reduced frictional force, improve hydraulic cylinder response frequency, but because design on the reason, existing Gap sealing also makes some defects of presence with static pressure supporting construction, so being badly in need of the high frequency that a kind of control accuracy is higher, friction is less Ring low friction servo hydraulic cylinder.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, provides structure simple, easy to use and will all press A kind of high frequency sound low friction servo hydraulic cylinder that slot structure, buffering slot structure and static pressure supporting construction combine.
This utility model adopts the technical scheme that:
A kind of high frequency sound low friction servo hydraulic cylinder, including piston, cylinder head, cylinder barrel and cylinder bottom, cylinder barrel two ends are respectively mounted Cylinder head and cylinder bottom, the piston rod of described two end face settings of piston passes from cylinder head and cylinder bottom, on the cylinder barrel of piston both sides respectively Setting oil-in and oil return opening it is characterised in that: described piston rod and piston are made into integration, axial along piston in piston outer rim Multiple piston balancing slits are made at direction interval, and on the inner edge that cylinder head and cylinder bottom contact near piston and with piston rod outer rim equal edges Multiple piston rod balancing slits are made at piston rod axial direction interval.
And, the middle part inner edge that cylinder head and cylinder bottom are contacted with piston rod outer rim all makes static pressure support slot, cylinder head and One static pressure support slot hydraulic fluid port is respectively provided with cylinder bottom, two static pressure support slot hydraulic fluid ports are respectively communicated with two static pressure support slots.
And, the cylinder head outer rim of static pressure support slot both sides on cylinder head makes two drain pans, the static pressure on cylinder bottom props up Two drain pans are made, the static pressure that two on cylinder head drain pan connects setting on cylinder head supports in the cylinder bottom outer rim of support groove both sides Drain tap, the static pressure that two on cylinder bottom drain pan connects setting on cylinder bottom supports drain tap.
And, described cylinder head and cylinder bottom make a protuberance towards the end of piston, the piston with each protuberance para-position Dashpot with the setting-in cooperation of corresponding protuberance is all made on end face, the piston in each dashpot is all made a groove.
Advantage of the present utility model and good effect are:
This utility model, arranges piston balancing slit on piston, setting piston rod balancing slit and quiet on cylinder head and cylinder bottom Pressure support slot, piston balancing slit, piston rod balancing slit eliminate with static pressure support slot and contact sealing, contact supports the friction producing Power, and piston balancing slit, piston rod balancing slit can reduce the side force of piston and piston rod, by piston and piston rod positioning On centre, piston, cylinder head and cylinder bottom, the buffer structure of setting is it can be avoided that piston collisions cylinder head and cylinder bottom, on cylinder head and cylinder bottom The drain tap of setting can reclaim fluid.
Brief description
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the i portion enlarged drawing of Fig. 1;
Fig. 3 is the ii portion enlarged drawing of Fig. 1;
Fig. 4 is the iii portion enlarged drawing of Fig. 1.
Specific embodiment
With reference to embodiment, this utility model is further illustrated, following embodiments are illustrative, be not limited It is impossible to limit protection domain of the present utility model with following embodiments.
A kind of high frequency sound low friction servo hydraulic cylinder, as shown in Figure 1,2,3, 4, including piston 21, cylinder head 4, cylinder barrel 16 and Cylinder bottom 18, cylinder barrel two ends are respectively mounted cylinder head and cylinder bottom, and the piston rod 1 of described two end face settings of piston is respectively from cylinder head and cylinder Bottom passes, and cylinder head and cylinder bottom is respectively provided with dust ring 2 and sealing ring 3, the cylinder barrel of piston both sides is provided for piston both sides Oil pocket 22 enters fuel-displaced hydraulic fluid port 10,15, and innovation of the present utility model is: described piston rod and piston are made into integration, in piston Make multiple piston balancing slits 14 along piston axial direction interval in outer rim, cylinder head and cylinder bottom near piston and with piston rod outer rim All multiple piston rod balancing slits 17 are made along piston rod axial direction interval on the inner edge contacting.
In the present embodiment, piston balancing slit is nine, and piston rod balancing slit is four, cylinder head contact with cylinder barrel with cylinder bottom Outer rim on be all embedded in an O-ring seal 8.All make quiet on the middle part inner edge that cylinder head and cylinder bottom are contacted with piston rod outer rim Pressure support slot 7, cylinder head and cylinder bottom is respectively provided with a static pressure support slot hydraulic fluid port 5, two static pressure support slot hydraulic fluid ports are respectively communicated with Two static pressure support slots.
Two drain pans 6,9 are made, the static pressure on cylinder bottom supports in the cylinder head outer rim of static pressure support slot both sides on cylinder head Two drain pans 9,6 are made on the cylinder bottom outer rim of groove both sides, two on cylinder head drain pan passes through to arrange on pipeline connection cylinder head Static pressure support drain tap 20, two on cylinder bottom drain pan connect cylinder bottom on setting static pressure support drain tap, drain pan stream The fluid going out flows back to fuel tank from drain tap, mounting process screw plug 19 on the pipeline processing mouth on cylinder head and cylinder bottom.
Described cylinder head and cylinder bottom make a protuberance 11, the piston end surface with each protuberance para-position towards the end of piston On all make with corresponding protuberance setting-in cooperation dashpot 12, the piston in each dashpot is all made a groove 13.
Pressure-equalizing groove structure
1. the effect of piston balancing slit and piston rod balancing slit
Piston, piston rod and cylinder barrel all can have certain taper, always there is gap between them, and their cooperation simultaneously always has There is certain bias.Taper and bias can cause a lateral imbalance force, and this power not only causes very big friction, and is also easy to produce Eccentric wear.For reducing this side force, annular balancing slit makes to be able to flow to low pressure from higher-pressure region around piston, the fluid of piston rod periphery Area, makes these pressure value tend to equal, the pressure any one set up gives short circuit, makes piston, piston rod positioning In centre.Balancing slit can effectively reduce side force, and also dirty material granule is provided with a storage space, balancing slit simultaneously simultaneously There is trend piston being pushed to center, thus so that leakage rate is reduced.
2. the effect of the dashpot of piston
In order to eliminate piston movement to mechanical impact during terminal, piston arranges gap buffer groove, works as piston movement In a segment distance to before stroke end, the protuberance of cylinder head or cylinder bottom enters in dashpot, and a part of fluid is closed Come, leave certain gap between protuberance and dashpot, the fluid of closing is discharged by this gap, thus producing suitable delaying Stamping press acts on piston, reaches the purpose of retarding braking.
3. the effect of static pressure support slot
Adopt static pressure to support between piston rod and cylinder head, cylinder bottom, static pressure support slot is had on cylinder head and cylinder bottom, this structure Belong to non-contact type to support, contact-type can be eliminated and support the frictional force producing.
This utility model, arranges piston balancing slit on piston, setting piston rod balancing slit and quiet on cylinder head and cylinder bottom Pressure support slot, piston balancing slit, piston rod balancing slit eliminate with static pressure support slot and contact sealing, contact supports the friction producing Power, and piston balancing slit, piston rod balancing slit can reduce the side force of piston and piston rod, by piston and piston rod positioning On centre, piston, cylinder head and cylinder bottom, the buffer structure of setting is it can be avoided that piston collisions cylinder head and cylinder bottom, on cylinder head and cylinder bottom The drain tap of setting can reclaim fluid.

Claims (4)

1. a kind of high frequency sound low friction servo hydraulic cylinder, including piston, cylinder head, cylinder barrel and cylinder bottom, cylinder barrel two ends are respectively mounted cylinder Head and cylinder bottom, the piston rod of described two end face settings of piston passes from cylinder head and cylinder bottom respectively, and the cylinder barrel of piston both sides sets Put oil-in and oil return opening it is characterised in that: described piston rod and piston are made into integration, along piston axial direction side in piston outer rim To making multiple piston balancing slits in interval, all along living on the inner edge that cylinder head and cylinder bottom contact near piston and with piston rod outer rim Multiple piston rod balancing slits are made at stopper rod axial direction interval.
2. a kind of high frequency sound low friction servo hydraulic cylinder according to claim 1 it is characterised in that: cylinder head and cylinder bottom and work Static pressure support slot is all made on the middle part inner edge that stopper rod outer rim contacts, cylinder head and cylinder bottom are respectively provided with a static pressure support slot Hydraulic fluid port, two static pressure support slot hydraulic fluid ports are respectively communicated with two static pressure support slots.
3. a kind of high frequency sound low friction servo hydraulic cylinder according to claim 2 it is characterised in that: the static pressure on cylinder head props up Make two drain pans in the cylinder head outer rim of support groove both sides, the cylinder bottom outer rim of static pressure support slot both sides on cylinder bottom makes two Drain pan, the static pressure that two on cylinder head drain pan connects setting on cylinder head supports drain tap, and two on cylinder bottom drain pan is even On logical cylinder bottom, the static pressure of setting supports drain tap.
4. a kind of high frequency sound low friction servo hydraulic cylinder according to claim 3 it is characterised in that: described cylinder head and cylinder bottom Make a protuberance towards the end of piston, with all make on the piston end surface of each protuberance para-position and corresponding protuberance setting-in The dashpot of cooperation, the piston in each dashpot is all made a groove.
CN201620729942.8U 2016-07-12 2016-07-12 Servo pneumatic cylinder of low friction of high frequency response Active CN205918687U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620729942.8U CN205918687U (en) 2016-07-12 2016-07-12 Servo pneumatic cylinder of low friction of high frequency response

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620729942.8U CN205918687U (en) 2016-07-12 2016-07-12 Servo pneumatic cylinder of low friction of high frequency response

Publications (1)

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CN205918687U true CN205918687U (en) 2017-02-01

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105952710A (en) * 2016-07-12 2016-09-21 天津优瑞纳斯液压机械有限公司 High frequency response low friction servo hydraulic cylinder
CN107355446A (en) * 2017-06-29 2017-11-17 中国空气动力研究与发展中心超高速空气动力研究所 A kind of piston support structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105952710A (en) * 2016-07-12 2016-09-21 天津优瑞纳斯液压机械有限公司 High frequency response low friction servo hydraulic cylinder
CN107355446A (en) * 2017-06-29 2017-11-17 中国空气动力研究与发展中心超高速空气动力研究所 A kind of piston support structure
CN107355446B (en) * 2017-06-29 2019-01-11 中国空气动力研究与发展中心超高速空气动力研究所 A kind of piston support structure

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