CN2869514Y

CN2869514Y - Valve piston sealing ring

Info

Publication number: CN2869514Y
Application number: CN 200620005597
Authority: CN
Inventors: 黄永进
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-02-16
Filing date: 2006-02-16
Publication date: 2007-02-14
Anticipated expiration: 2016-02-16

Abstract

The utility model relates to a sealing ring of valve piston, which comprises valve cylinder tube, cylinder, piston, sealing ring, the sealing ring is ring metal rack, the section roller made of antifriction material include pilot ring and sealing ring body, metal rack is in sealing ring body, the axial direction pilot ring is embedded in inner ring of sealing ring body, sealing ring body have upper and lower rings, the inside ring end is protruded outward to form Inclined protuberance, the section is dovetail form, the dovetail form sealing ring has anti-attrition and compensation capacity, the up and down ends of sealing ring shall push separately the cylinder and cylinder, the cylinder is closed to cylinder, can be easily replaced, the axial direction pilot ring can improve motion accuracy degree of piston shaft and the utility model machining precision requirement for sealing ring is lower, thus the costs can be saved and the market competition can be increased.

Description

A kind of valve piston seal ring

Technical field:

The utility model relates to a kind of architecture advances of valve piston seal ring, particularly relates to the improvement of the seal ring structure of the built-in piston of a kind of piston-type underwater force control valve.

Background technique:

Hydraulic control valve, as piston-type underwater force control valve, piston type adjustable pressure-reducing valve, piston type flow control valve ..., or the like, piston is reciprocating along the valve inboard wall of cylinder block, seal ring at piston and valve inboard wall of cylinder block gap location adopts one or more O type circle, piston is reciprocating on the valve inboard wall of cylinder block as shown in Figure 1, and one group of O type circle closely is embedded in the groove of offering on the piston outer wall, seals in the process of the relative inboard wall of cylinder block motion of piston.

Summary of the invention:

The utility model provides a kind of valve piston seal ring, its purpose is to provide a kind of existing O type seal ring that is different from, the valve piston seal ring of this structure has compensation ability at piston to the wearing and tearing of seal ring, more durable, the piston axial motion is more accurate, the resistance to motion of piston is littler, and simpler in processing, assembling, maintenance to this product.

For reaching above-mentioned purpose, the utility model adopts following technological scheme:

A kind of valve piston seal ring, comprise the valve cylinder body, cylinder cap, piston, seal ring, piston is reciprocating along inboard wall of cylinder block, seal ring places the gap location of cylinder body and piston relative movement, cylinder cap places seal ring top and is fixed on the cylinder body, it is characterized in that: described seal ring is by the annular metal shaping rack, the ring-type axial lead circle that high-abrasive material is made, the seal ring body is formed, the metal shaping rack is coated in the seal ring body, the axial lead circle is embedded in seal ring body inner ring, the seal ring body is the anchor ring inner ring end annular projection that all stretches out up and down, and the seal ring upper and lower end face is resisted against cylinder body respectively, cylinder cap.Described annular projection be the seal ring body by the outer ring to the outward extending inclination angle of inner ring, the parting face is dove-tail form.

The usefulness of technique scheme is: in the axially reciprocating process of piston, the dove-tail form projection of seal ring end, in the wear process of piston, has compensation ability to seal ring, described like this seal ring is more durable, the setting of the axial lead circle that metal shaping rack and high-abrasive material are made, improved the precision of piston axial motion, because the seal ring upper and lower end face is resisted against cylinder body respectively, cylinder cap, unclamp the securing means of cylinder cap and cylinder body, can lightly assemble, safeguard, change seal ring, and lower than existing O type circle requirement on the machining accuracy of seal ring, saved processing cost.

Description of drawings:

Below with accompanying drawing the utility model is described in detail:

Fig. 1 is existing valve piston seal ring structure generalized section

This practical valve piston seal ring structure generalized section of Fig. 2 position

Embodiment

As shown in Figure 1 and Figure 2, a kind of valve piston seal ring, comprise valve cylinder body 1,1 ', cylinder cap 2, piston 3,3 ', seal ring 4,4 ', piston 3,3 ' is made axially reciprocating along casing wall 11,1 ' 1, and cylinder cap 2 places seal ring 4,4 ' top and is anchored on the cylinder body.Seal ring 4 ' adopts common rubber o-ring in the middle of the existing technology, has easy to wear, problems such as assembling difficulty is big, processing cost height.Seal ring 4 described in the utility model is by annular metal shaping rack 42, the ring-type axial lead circle 43 that high-abrasive material is made, seal ring body 41 is formed, metal shaping rack 42 is coated in the seal ring body 41, axial lead circle 43 is embedded in seal ring body 41 inner rings, the seal ring body is the anchor ring inner ring end ring-type inclination angle projection that all stretches out about in the of 41, the parting face is dove-tail form, seal ring 4 upper and lower end faces are resisted against cylinder body 1 respectively, cylinder cap 2, cylinder cap 2 is anchored on the cylinder body 1, piston 3 relative annular projections, axial lead circle 43, cylinder body 1, cylinder cap 2 inner ring walls are made axially reciprocating.In the axially reciprocating process of piston 3, the dove-tail form projection of seal ring 4 ends, in the wear process of 3 pairs of seal rings 4 of piston, has compensation ability, improved the serviceability of seal ring greatly, reduced the replacing frequency, and the resistance to motion of piston 3 is littler, the setting of the axial lead circle 43 that metal shaping rack 42 and high-abrasive material are made, improved the precision of piston 3 axial motions, because seal ring 4 upper and lower end faces are resisted against cylinder body 1 respectively, cylinder cap 2, unclamp the securing means of cylinder cap 2 and cylinder body 1, can lightly assemble, safeguard, change seal ring 4, and require lowly on the machining accuracy of seal ring 4 than existing O type seal ring 4 ', so, saved processing cost.

Claims

1, a kind of valve piston seal ring, comprise the valve cylinder body, cylinder cap, piston, seal ring, piston is reciprocating along inboard wall of cylinder block, seal ring places the gap location of cylinder body and piston relative movement, cylinder cap places seal ring top and is fixed on the cylinder body, it is characterized in that: described seal ring is by the annular metal shaping rack, the ring-type axial lead circle that high-abrasive material is made, the seal ring body is formed, the metal shaping rack is coated in the seal ring body, the axial lead circle is embedded in seal ring body inner ring, the seal ring body is the anchor ring inner ring end annular projection that all stretches out up and down, and the seal ring upper and lower end face is resisted against cylinder body respectively, cylinder cap.

2, valve piston seal ring as claimed in claim 1 is characterized in that: described annular projection be the seal ring body by the outer ring to the outward extending inclination angle of inner ring, the parting face is dove-tail form.