CN2830801Y

CN2830801Y - Elliptic rubber sealing ring

Info

Publication number: CN2830801Y
Application number: CN 200520084871
Authority: CN
Inventors: 邱坤宝; 张兴禄; 张文耀; 李育春
Original assignee: JEIRILOG (FUJIAN) ENGINEERING MACHINERY Co Ltd
Current assignee: JEIRILOG (FUJIAN) ENGINEERING MACHINERY Co Ltd
Priority date: 2005-06-30
Filing date: 2005-06-30
Publication date: 2006-10-25
Anticipated expiration: 2015-06-30

Abstract

The utility model relates to a leakproof sealing device, particularly an elliptic rubber sealing ring, which is formed by that a ring body is rounded. The ring body of the rubber sealing ring has an elliptical cross section. A short shaft of the elliptic cross section is coincident with the radial line of the ring body of the rubber sealing ring. The realization of a typing angle with a large range for being selected during manufacture, no damage on the sealing surface of the work piece, easy mold release, small amount of precompression, etc., exists. The utility model has the advantages of good sealing effect, strong reliability, long service life, low manufacture cost and maintenance cost, etc., and is particularly suitable for the leakproof sealing of fluid reciprocating moving parts.

Description

Oval circle body rubber seal

One. technical field

The utility model relates to a kind of leakage proof seal arrangement, and especially a kind of oval circle body rubber seal is suitable for the leakage proof sealing of fluid reciprocatory motion parts.

Two. background technique

The seal ring that is used for fluid reciprocatory motion parts leakage proof at present is O shape rubber seal normally, and dividing from the cross section of O-ring seals has ladder type cross section and round cross section.The sealing effect of the O-ring seals of ladder type cross section is better, but has deficiencies such as parts physical dimension and surface friction drag are all bigger, generally should not use on fluid reciprocatory motion parts.With the utility model comparatively approaching be the O-ring seals of round cross section, though can on fluid reciprocatory motion parts, use, parts physical dimension and surface friction drag are all little, the static seal effect is not bad under the normal condition, but since its somatotype angle necessary≤90 °, make comparatively difficulty, angle hour is difficult for very much the demoulding; Somatotype overlap and mold joint also formed an additional O shape circle when angle was too big, and easy damaged loses sealing effect; In a word, during the angle nonoptimal value mold joint of seal ring easily with parts sealing surfaces damage, easy to leak more often during motive sealing, so that increase and make and maintenance cost.

Three. summary of the invention

Task of the present utility model provides a kind of improved O shape rubber seal, and its existing good sealing effect can reduce again and make and maintenance cost.

For finishing this task, the utility model carries out in the following way:

The non-circular cross-section rubber seal around forming, is set as oval cross section with the circle body of rubber seal by circle body.

The minor axis of oval cross section and the circle body radial line of rubber seal are coincide.

The utility model is because only need make the circle body circular cross section of rubber seal into oval cross section, owing to there is somatotype angle in a big way can to select for use when making, do not damage the parts sealing surfaces, so good sealing effect; Simultaneously because the circle body radial line of the minor axis of oval cross section and rubber seal is identical, so the demoulding is easier, pre compressed magnitude is little; Derive thus and also have advantages such as good reliability, long service life, manufacturing and maintenance cost are low.

Four. description of drawings

The concrete structure of model utility is provided by following examples and accompanying drawing thereof.

Fig. 1 is the rubber seal plan view.

Fig. 2 is that the A-A of Fig. 1 is to analysing and observe known rubber seal cross sectional representation.

Fig. 3 is that A-A according to a kind of oval circle body rubber seal Fig. 1 that the utility model proposes is to analysing and observe cross sectional representation.

Each sign expression in the accompanying drawing:

1. circle body 2. circular cross sections 3. oval cross sections 4. radial lines 5. minor axises

Five. embodiment

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

As shown in Figure 1, by circle body 1 around the rubber seal that forms.

With reference to Fig. 2, this figure is that the A-A of Fig. 1 illustrates that to analysing and observe known rubber seal cross section the circle body 1 of rubber seal is a circular cross section 2.

As shown in Figure 3, this figure be A-A according to a kind of oval circle body rubber seal Fig. 1 that the utility model proposes to the cross section signal of analysing and observe, the circle body 1 of rubber seal is an oval cross section 3.The minor axis 5 of described oval cross section 3 coincide with the circle body of rubber seal 1 radial line 4, and the design alternative at somatotype angle is tending towards reduction, even rubber seal is can the demoulding injury-free again, keeps having good sealing effect.

Claims

1. oval circle body rubber seal, around forming, the circle body (1) that it is characterized in that rubber seal is oval cross section (3) by circle body (1) for it.

2. oval circle body rubber seal according to claim 1 is characterized in that the minor axis (5) of described oval cross section (3) is identical with circle body (1) radial line (4) of rubber seal.