CN203098466U - Piston structure eliminating back pressure - Google Patents

Piston structure eliminating back pressure Download PDF

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Publication number
CN203098466U
CN203098466U CN 201320096556 CN201320096556U CN203098466U CN 203098466 U CN203098466 U CN 203098466U CN 201320096556 CN201320096556 CN 201320096556 CN 201320096556 U CN201320096556 U CN 201320096556U CN 203098466 U CN203098466 U CN 203098466U
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CN
China
Prior art keywords
piston
hydraulic cylinder
axial cylindrical
back pressure
radial blind
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Active
Application number
CN 201320096556
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Chinese (zh)
Inventor
王伟伟
王秀君
李永奇
张孝元
祝小满
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.)
Xuzhou XCMG Hydraulics Co Ltd
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Xuzhou XCMG Hydraulics Co Ltd
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Priority to CN 201320096556 priority Critical patent/CN203098466U/en
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Abstract

The utility model discloses piston structure eliminating back pressure, and belongs to the field of hydraulic cylinders. The piston structure comprises a piston. The piston is of a double Y ring sealed structure. An axial cylindrical hole is formed in the piston along the axial direction, the end portion of the axial cylindrical hole is provided with a one-way valve with set opening pressure, meanwhile a radial blind hole is formed in the radial direction of the piston, one end of the radial blind hole is communicated with the axial cylindrical hole, and the other end of the radial blind hole is located between two grooves provided with Y rings of the piston. When a hydraulic cylinder works, hydraulic oil seeping from the Y rings of two cavities of the hydraulic cylinder passes through the axial cylindrical hole and the one-way valve at the end portion of the axial cylindrical hole and flows back into the hydraulic cylinder. The piston structure has the advantages that the back pressure produced due to accumulation of the hydraulic oil between the double Y rings is eliminated, reliability of a sealing ring is effectively protected, internal leakage of the hydraulic cylinder is reduced, and service life of the hydraulic cylinder is prolonged.

Description

A kind of piston structure of eliminating back pressure
Technical field
The utility model relates to a kind of hydraulic cylinder piston, specifically is a kind of piston structure of eliminating back pressure; Be applicable to hydraulic cylinder piston and cylinder barrel sealing configuration.Be mainly used on the oil hydraulic cylinder of engineering machinery, construction implement and other industry machineries, belong to the hydraulic element component in the fluid transmission field.
Technical background
Along with developing rapidly of China's engineering machinery, construction implement, metallurgical machinery, municipal engineering and other industries, all kinds of main frames require more and more higher for the sealability of oil hydraulic cylinder.At present, the hydraulic cylinder piston sealing is sealing support ring and seal ring sealing configuration, in piston rod to-and-fro motion process, position between the seal ring is infiltrated fluid easily and is produced back pressure, quicken the inefficacy of seal ring, thereby let out in causing, reduced the reliability of oil hydraulic cylinder.
Summary of the invention
The utility model provides a kind of piston structure that can eliminate back pressure, its objective is: eliminate the back pressure that produces owing to the hydraulic oil accumulation between two Y circles, effectively protect the reliability of seal ring, reduce in the oil hydraulic cylinder and let out, increase the working life of oil hydraulic cylinder.
The utility model is realized with following technological scheme: a kind of piston structure of eliminating back pressure, comprise piston, described piston is two Y circle sealing configurations, processes an axial cylindrical bore on piston vertically, in the end of axial cylindrical bore an one-way valve of setting cracking pressure is installed; Simultaneously, along radially processing one radial blind holes of piston, an end of radial blind holes is communicated with axial cylindrical bore, and the other end is installed between the groove of Y circle in two in piston.
Working principle is: when hydraulic cylinder works, oil hydraulic cylinder two chambeies are owing to the hydraulic oil of to-and-fro motion from the infiltration of Y circle flows back in the oil hydraulic cylinder through the axial cylindrical hole and the one-way valve of axial cylindrical bore ends.Can eliminate the back pressure that produces owing to the hydraulic oil accumulation between two Y circles like this, effectively protect the reliability of seal ring, reduce in the oil hydraulic cylinder and let out, increase the working life of oil hydraulic cylinder.
The beneficial effects of the utility model are: said structure, reduced the back pressure that produces owing to the hydraulic oil accumulation between two Y circles, and effectively protect the reliability of seal ring, reduce in the oil hydraulic cylinder and let out, increase the working life of oil hydraulic cylinder, promoted product total quality level.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is an embodiment's of the utility model a structural representation;
Fig. 2 is another embodiment's of the utility model a structural representation.
Among the figure: 1, one-way valve, 2, piston, 3, the Y circle, 4, cylinder barrel, 5, axial cylindrical bore, 6, radial blind holes.
Embodiment
Embodiment as shown in Figure 1 is the piston structure that a kind of double-direction relief is eliminated back pressure, and its piston 2 is two Y circle sealing configurations, and 2 Y circles are promptly arranged; On piston, process an axial cylindrical bore 5 vertically, along radially processing one blind hole 6 of piston 2; Described axial cylindrical bore 5 is a through hole, and an one-way valve 1 of having set cracking pressure is respectively installed at its two ends, and the position, intermediate portion is communicated with an end of radial blind holes 6, and the other end of radial blind holes 6 is installed between the groove of Y circle 3 in two in piston; Constitute the double-direction relief piston structure.
When hydraulic cylinder works, oil hydraulic cylinder two chambeies are owing to the hydraulic oil of to-and-fro motion from 3 infiltrations of Y circle flow back in the oil hydraulic cylinder through the axial cylindrical hole 5 and the one-way valve 1 at axial cylindrical bore two ends.Can eliminate the back pressure that produces owing to the hydraulic oil accumulation between two Y circles like this, effectively protect the reliability of seal ring, reduce in the oil hydraulic cylinder and let out, increase the working life of oil hydraulic cylinder.
Embodiment as shown in Figure 2 is the piston structure that back pressure is eliminated in a kind of unidirectional pressure release, and its piston 2 is two Y circle sealing configurations, and 2 Y circles are promptly arranged; On piston, process an axial cylindrical bore 5 vertically, along radially processing one blind hole 6 of piston 2; Described axial cylindrical bore 5 is a blind hole, and the one end is installed an one-way valve 1 of having set cracking pressure; The other end is communicated with an end of radial blind holes 6, and the other end of radial blind holes 6 is installed between the groove of Y circle 3 in two in piston; Constitute unidirectional pressure release piston structure.
When hydraulic cylinder works, oil hydraulic cylinder two chambeies are owing to to-and-fro motion is flowed back in the oil hydraulic cylinder from the hydraulic oil process axial cylindrical bore 5 of Y circle 3 infiltrations and the one-way valve 1 of axial cylindrical bore one end.Can eliminate the back pressure that produces owing to the hydraulic oil accumulation between two Y circles like this, effectively protect the reliability of seal ring, reduce in the oil hydraulic cylinder and let out, increase the working life of oil hydraulic cylinder.

Claims (3)

1. piston structure of eliminating back pressure, comprise piston (2), it is characterized in that: described piston is processed an axial cylindrical bore (5) vertically for two Y circle sealing configurations on piston, in the end of axial cylindrical bore (5) one-way valve of setting cracking pressure (1) is installed; Simultaneously, along radially processing one radial blind holes (6) of piston, an end of radial blind holes (6) is communicated with axial cylindrical bore (5), and the other end is positioned at two in piston and installs between the groove of Y circle (3).
2. a kind of piston structure of eliminating back pressure according to claim 1, it is characterized in that: described axial cylindrical bore (5) is through hole, an one-way valve of setting cracking pressure (1) is respectively installed at its two ends, the position, intermediate portion is communicated with an end of described radial blind holes (6), and the other end of radial blind holes (6) is positioned at two in piston and installs between the groove of Y circle (3); Constitute the double-direction relief piston structure.
3. a kind of piston structure of eliminating back pressure according to claim 1 is characterized in that: described axial cylindrical bore (5) is a blind hole, and the one end is installed an one-way valve of setting cracking pressure (1); The other end is communicated with an end of radial blind holes (6), and the other end of radial blind holes (6) is positioned at two in piston and installs between the groove of Y circle (3); Constitute unidirectional pressure release piston structure.
CN 201320096556 2013-03-01 2013-03-01 Piston structure eliminating back pressure Active CN203098466U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320096556 CN203098466U (en) 2013-03-01 2013-03-01 Piston structure eliminating back pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320096556 CN203098466U (en) 2013-03-01 2013-03-01 Piston structure eliminating back pressure

Publications (1)

Publication Number Publication Date
CN203098466U true CN203098466U (en) 2013-07-31

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ID=48849871

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320096556 Active CN203098466U (en) 2013-03-01 2013-03-01 Piston structure eliminating back pressure

Country Status (1)

Country Link
CN (1) CN203098466U (en)

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