CN202091286U - Internal-circulation balanced pressure oil cylinder - Google Patents

Internal-circulation balanced pressure oil cylinder Download PDF

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Publication number
CN202091286U
CN202091286U CN2011201733270U CN201120173327U CN202091286U CN 202091286 U CN202091286 U CN 202091286U CN 2011201733270 U CN2011201733270 U CN 2011201733270U CN 201120173327 U CN201120173327 U CN 201120173327U CN 202091286 U CN202091286 U CN 202091286U
Authority
CN
China
Prior art keywords
oil
oil cylinder
cylinder
piston rod
piston
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN2011201733270U
Other languages
Chinese (zh)
Inventor
田宏阳
朱坤
孙向玲
徐波
余清华
潘少平
方雄文
樊柱
孙正宏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hanland Machine Tool Group Co Ltd
Original Assignee
Hanland Machine Tool Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hanland Machine Tool Group Co Ltd filed Critical Hanland Machine Tool Group Co Ltd
Priority to CN2011201733270U priority Critical patent/CN202091286U/en
Application granted granted Critical
Publication of CN202091286U publication Critical patent/CN202091286U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an internal-circulation balanced pressure oil cylinder. The internal-circulation balanced pressure oil cylinder comprises a double-acting oil cylinder assembly, two one-way valves and two overflow valves, wherein the double-acting oil cylinder assembly comprises an oil cylinder body, a piston and a piston rod; two end heads of the piston rod extend out of end closures at two ends of the oil cylinder body; the piston is positioned in the middle of the piston rod and divides the oil cylinder into two oil cavities; the oil cavities on two sides are connected with a one-way valve and an overflow valve respectively; the oil inlets of the two overflow valves are communicated with the oil cavities on the two sides; and the oil outlet of the overflow valve on one side is communicated with the oil inlet of the overflow valve on the other side. The internal-circulation balanced pressure oil cylinder is mainly used for releasing the stress of a rigid connecting body of a precise machine tool, which is generated by heat expansion and cold contraction, has a damping property at a certain pressure, and is small in motion, very high in sensitivity, simple in structure, practical, low in cost and convenient to regulate and install.

Description

Interior cyclic balance oil pressure cylinder
Technical field
The utility model relates to a kind of hydraulic pressure installation, particularly a kind of oil cylinder of inner circulation type balance pressure.
Background technique
In existing machine tool design, oil hydraulic cylinder and related with it hydraulic control system are indispensable.Usually, the a certain oil hydraulic cylinder that is installed on the lathe must be connected with relevant hydraulic control system, oil hydraulic cylinder is an executive component of hydraulic pressure installation, the control system supporting with oil hydraulic cylinder includes fuel tank, oil pump, valve and pipeline etc., the flow velocity of pressure oil, flow and the flow direction all will be controlled by control system, can guarantee the proper functioning of oil hydraulic cylinder, displacement accurately or rotation take place thereby drive the workpiece that is attached thereto.We can say that existing oil hydraulic cylinder all can not work alone, must be controlled by control system, and this hydraulic pressure installation is not suitable all occasions, for example the thermal distortion stress relief occasion of rigid member.
The model utility content
The purpose of this utility model is to provide a kind of interior cyclic balance oil pressure cylinder, it has under certain pressure opens automatically, reach pressure balance by the fluid internal circulation system in the cylinder body, and have the two-way function function, can solve the stress relief problem that rigid connector produces because of expanding with heat and contract with cold in the precision machine tool.
The technological scheme that realizes above-mentioned purpose is: cyclic balance oil pressure cylinder in a kind of, it is by a two-way cylinder assembly, two one-way valves, two relief valves are formed, described two-way cylinder assembly comprises a cylinder body, a piston and a piston rod, the piston rod two ends is stretched out the end cap at cylinder body two ends respectively, piston is positioned at the neutral position of piston rod and oil cylinder is divided into two oil pockets, the oil pocket on both sides respectively is connected with an one-way valve and a relief valve, the filler opening of two relief valves is communicated with the oil pocket on both sides respectively, on one side the oil outlet of relief valve be communicated with the filler opening of another side relief valve.
As the improvement of above-mentioned technology, the oil pocket on described both sides respectively is connected with a cover oil pocket pressure trimming assembly, is used for getting rid of air and the micro-pressure of adjusting in the oil pocket in the oil pocket.
This device is mainly used in and discharges the stress that the body that is rigidly connected in the precision machine tool produces because of expanding with heat and contract with cold.Cylinder body is fixed on the static relatively pedestal, and an end of piston rod discharges the position with the body stress that is rigidly connected and is connected, and the other end is a free end.Before the work, by two one-way valves two oil pockets are filled with pressure oil earlier, carry out exhaust and trace adjustment by the pressure trimming assembly again, make the pressure balance in the oil pocket of both sides, piston generally is in the central authorities of oil cylinder stroke.During work, when being thrust as if the stress that is connected the body that is rigidly connected of piston rod right-hand member, this thrust is passed to the left chamber of oil cylinder by piston rod, when the pressure of left oil pocket reached setting value, the relief valve on it will be opened, and the intercommunication oil pipe about fluid passes through between two relief valves flows into the right chamber of oil cylinder, at this moment, the pressure of right cavity of cylinder rises and also reaches the right and left pressure balance, like this, causes that because of expanding with heat and contract with cold the be rigidly connected stress deformation thrust of body of lathe just is released; In like manner, when the stress of piston rod acceptance is pulling force, pulling force is passed to right cavity of cylinder by piston rod, when power reaches certain value, the relief valve that is connected with right cavity of cylinder is opened, and piston rod moves to right, and fluid flows into chamber, an oil cylinder left side, the pressure in chamber, an oil cylinder left side rise and make about two oil pockets reach pressure balance, pulling force promptly is released.
About the balance pressure value of two oil pockets determine that by relief valve the cracking pressure of relief valve has determined the external force that cylinder system can bear.This device has the damping characteristic of opening under certain pressure, its motion trace and sensitivity are very high, and it is applied to the stress deformation occasion of the various bodies that are rigidly connected, and it is simple in structure, practical, and is with low cost, debugs easy for installation.
Description of drawings
Fig. 1 is a schematic diagram of structure of the present utility model.
Fig. 2 is an an embodiment's of the present utility model plan view.
Fig. 3 is a left view embodiment illustrated in fig. 2.
Fig. 4 is the B-B sectional view of Fig. 3.
Fig. 5 is the A-A sectional view of Fig. 2.
Among the figure: 1,8. one-way valve, 2. piston, 21. piston rods, 3. cylinder body, 31. right cavitys, 32. left cavitys, 4,7. pressure trimming assembly, 5,6. relief valve.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
Extremely shown in Figure 5 as Fig. 1, cyclic balance oil pressure cylinder device is by a two-way cylinder assembly in the utility model, two one-way valves 1 and 8, two relief valves 5 and 6 are formed, the two-way cylinder assembly comprises a cylinder body 3, a piston 2 and a piston rod 21, piston rod 21 two ends are stretched out the end cap at cylinder body 3 two ends respectively, piston 2 be positioned at the neutral position of piston rod 21 and cylinder body 3 is divided into about two oil pockets 31 and 32, left side oil pocket 32 is connected with an one-way valve 8 and a relief valve 6, right oil pocket 31 is connected with an one-way valve 1 and a relief valve 5, the filler opening of relief valve 5 is communicated with oil pocket 31, the filler opening of relief valve 6 is communicated with oil pocket 32, the filler opening of the oil outlet of relief valve 6 and relief valve 5 is communicated with, and the filler opening of the oil outlet of relief valve 5 and relief valve 6 is communicated with.In the present embodiment, the oil pocket 31 and 32 on both sides respectively is connected with a cover oil pocket pressure trimming assembly 4 and 7, and trimming assembly 4 and 7 is used for getting rid of air and the micro-pressure of adjusting in the oil pocket in the oil pocket.

Claims (2)

1. cyclic balance oil pressure cylinder device in a kind, it is characterized in that: it is by a two-way cylinder assembly, two one-way valves, two relief valves are formed, described two-way cylinder assembly comprises a cylinder body, a piston and a piston rod, the piston rod two ends is stretched out the end cap at cylinder body two ends respectively, piston is positioned at the neutral position of piston rod and oil cylinder is divided into two oil pockets, the oil pocket on both sides respectively is connected with an one-way valve and a relief valve, the filler opening of two relief valves is communicated with the oil pocket on both sides respectively, on one side the oil outlet of relief valve be communicated with the filler opening of another side relief valve.
2. according to the described cylinder apparatus of claim 1, it is characterized in that: the oil pocket on described both sides respectively is connected with a cover oil pocket pressure trimming assembly.
CN2011201733270U 2011-05-21 2011-05-21 Internal-circulation balanced pressure oil cylinder Expired - Fee Related CN202091286U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011201733270U CN202091286U (en) 2011-05-21 2011-05-21 Internal-circulation balanced pressure oil cylinder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011201733270U CN202091286U (en) 2011-05-21 2011-05-21 Internal-circulation balanced pressure oil cylinder

Publications (1)

Publication Number Publication Date
CN202091286U true CN202091286U (en) 2011-12-28

Family

ID=45366355

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2011201733270U Expired - Fee Related CN202091286U (en) 2011-05-21 2011-05-21 Internal-circulation balanced pressure oil cylinder

Country Status (1)

Country Link
CN (1) CN202091286U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102192213A (en) * 2011-05-21 2011-09-21 汉川机床集团有限公司 Internal recycle balance pressure oil cylinder
CN103398036A (en) * 2013-08-21 2013-11-20 安徽永大农业科技发展有限公司 Hydraulic cylinder balancing device for high-temperature on-line sterilizer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102192213A (en) * 2011-05-21 2011-09-21 汉川机床集团有限公司 Internal recycle balance pressure oil cylinder
CN102192213B (en) * 2011-05-21 2014-04-16 汉川机床集团有限公司 Internal recycle balance pressure oil cylinder
CN103398036A (en) * 2013-08-21 2013-11-20 安徽永大农业科技发展有限公司 Hydraulic cylinder balancing device for high-temperature on-line sterilizer

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Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20111228

Termination date: 20150521