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Seal device

A sealing device and combined sealing technology, which is applied in the direction of engine seals, piston rings, mechanical equipment, etc., can solve the problem of large assembly resistance when inserting external components, and achieve the effect of avoiding oil leakage

Inactive Publication Date: 2015-11-25
RIKEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, the seal rings of JP 2008-190643 and JP 2008-190650 are designed so that the inner peripheral surface of the seal ring is in contact with the bottom of the seal groove, so even if it is easy to assemble to the groove of the inner member, The assembly resistance when inserting the outer member is also relatively large, and special fixtures need to be considered. In fact, there are still many technical problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Using PTFE resin made of composite carbon, a ring-type resin ring without a joint is produced. Here, the outer diameter (nominal diameter) of the resin ring was 114.5 mm, the thickness (radial width a1) was 3.2 mm, and the width (axial width h1) was 2.7 mm. In the obtained resin rings, there are formed in figure 1 In the cross section shown, the opening width (w) on the inner peripheral surface side is 1.0 mm, and the cutout portion has a radius of curvature of 0.8 mm. In addition, using a SWOSC-V material with a wire diameter of 0.6mm, a spiral expander with a coil diameter of φ1.5mm, a gap of 1.65mm in a free state, and a tension of 10N when combined with a resin ring was produced.

[0037] leak test

[0038] use Figure 6 A leak test machine whose outline is shown in The manufactured combined seal ring is fitted into the seal ring groove 5 provided in the inner member 3 and inserted into the outer member 4 . The diameter of the inner member 3 of the leak tester...

Embodiment 2

[0040] In addition to making figure 2 A combined seal ring was produced in the same manner as in Example 1 except for the shown resin ring 1 having a cut portion composed of three surfaces 21 , 22 , and 23 . Here, the opening width (w) of the inner peripheral surface side of the cutting portion is 2.0 mm (74% of h1), the surface 23 is 0.9 mm parallel to the axial direction of the resin ring 1, and the inclination angle of the surface 22 is 30°. The angle of inclination of the face 21 is 80°. As a result of the same leak test as in Example 1, no leak occurred before and after the heat history.

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PUM

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Abstract

In order to provide a seal device that has a sealing structure that enables assembly without a decrease in efficiency in a CVT assembly step and that does not leak oil even in situations when an engine is off and an oil pump is not operating, or in other words situations when oil pressure is not imparted to the sealing, the configuration is such that a combined sealing contains an endless resin ring, of which the outer peripheral surface slides against the inner peripheral surface of an outer member, and a coil expander that presses the resin ring in the outer peripheral direction and the lateral direction, the coil expander is disposed in a cut section provided to the corner of the inner peripheral surface and pressure bearing surface of the resin ring, and the inner peripheral side of the combined sealing is spaced from the groove bottom of the sealing groove.

Description

technical field [0001] The invention relates to a reciprocating sliding sealing device for a belt type continuously variable transmission (CVT), a compressor and the like. Background technique [0002] For example, in a CVT, a pair of pulleys are attached to the rotating shafts on the driving side and the driven side, and an endless belt is stretched between the two pulleys to connect the two rotating shafts to each other. The driving pulley has a movable pulley and a fixed pulley, and the driven pulley also has a movable pulley and a fixed pulley. In addition, a drive-side oil chamber and a driven-side oil chamber are provided on the movable pulley side of the two pulleys, and the movable pulley of the two pulleys is moved in the axial direction by the operating pressure supplied to each oil chamber, that is, by changing The groove width of the two pulleys is used for variable speed control. The seal ring is fitted in the seal ring groove provided on the outer peripheral ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16J15/18F16J9/28F16J15/24
CPCF16J15/164F16J9/28F16J15/18F16J15/24F16J15/56F16J9/062F16J15/3212
Inventor 八子长人品田贵史深田纯
Owner RIKEN CO LTD
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