CN2241799Y

CN2241799Y - Combined shaped sealing ring

Info

Publication number: CN2241799Y
Application number: CN 95209098
Authority: CN
Inventors: 刘刚
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-09
Filing date: 1995-05-09
Publication date: 1996-12-04
Anticipated expiration: 2005-05-09

Abstract

The utility model relates to a combined shaped sealing ring, which is suitable for high, mid and low voltage, particularly for being used in the sealing device of the electromechanical product, such as a tapping switch, etc. The sealing ring is mainly characterized in that the lower part of the ring section of the sealing ring is trapezoid-shaped, and the upper part has at least one ring structure which is convex both inside and outside. When the utility model used, the wedging and compensating action of the conical surface in the lower part and the second sealing action of the convex ring in the upper part can provide a relatively big contact area between the sealing element and the construction member to achieve the effective and reliable sealing. The sealing ring can also make up for the relatively large errors caused in the processing of the shaft and hole, and thus the requirement for the machining accuracy of the manufacture of the shaft and hole is relatively low. The utility model has the advantages of simple manufacture, convenient operation and maintenance.

Description

The combination fixing ring

The utility model relates to a kind of high, medium and low means of press seals that is applicable to, is particularly useful for the combination fixing ring that uses in the seal arrangement of electronic products such as shunting switch.

In Chinese patent CN2101139U, proposed in a kind of being applicable to, low pressure or do not have the trapezoidal seal ring of means of press seals.Its performance product more in the past is improved largely, and has solved the sealing problem of a lot of products.But it is excessive that its conical surface wedging action of the big back of impacting force makes axle and seal ring press power indirectly, this moment axle as need to rotate and need big operational torque, operation is hard, ring wear is big simultaneously, the life-span is short.Will address this problem in the reality normally increases one or more O type circles again and replenishes on trapezoidal seal ring top.This uses and when installing, also often makes the people feel inconvenience actual.

The purpose of this utility model is to avoid above-mentioned deficiency and proposes a kind of be easy to reach sealing effect and combination fixing ring easy to use.

The purpose of this utility model is realized by following scheme, by the uniform section annular ring that flexible material constituted, its difference is that this bottom, circular crosssection is a trapezoid shaped, the shape of outer lug in outer side surface has at least together in the top, its above and below is parallel, angle α=10 of inner side surface vertical and the bottom outside conical surface and center line °-80 °.

According to such scheme, owing to adopt combination profiled-cross-section structure, whole seal ring bottom just is external conical shape, has wedging action preferably, even thereby axle, the hole is manufactured with than mistake, because the compensating action of the conical surface, still can make seal ring that bigger surface of contact and faying surface are arranged, to reach reliable and effective sealing, while requires the sealing occasion of rotation at high pressure or middle last item, reduce under the axial pressing force situation for reaching the light purpose of rotation, even a little seepage is arranged at the bottom, the inside and outside convex shape on top just can play the seal action of common O type circle.Combination fixing ring reaches the wearing and tearing that secondary even three sealing effects reduce seal rings, improve the life-span, and axle is rotated flexibly, and the sealing circle only need install when using singlely, thereby is convenient to people and installs and change, and uses more convenient.

Fig. 1 is a positive view of the present utility model.

Fig. 2 is the installation diagram (rotation place sealing) of the utility model in off circuit tap changer.

Fig. 3 is the installation diagram (motionless place sealing) of the utility model in load ratio bridging switch.

Embodiment of the present utility model as shown in Figure 1, whole member is a uniform section annular ring, the bottom, circular crosssection is a trapezoid shaped, outer lug is circular-arc in having together in the top on the outer side surface, above 3 with following 1 mutual equality, inner side surface 4 is vertical with the above and below, and circular-arc 5 of interior outer lug is arranged on the outer side surface in the top, angle α=10 of the bottom outside conical surface 2 and center vertical line A °-80 °, whole seal ring can be made by rubber.

Claims

1, a kind ofly is applicable to high, medium and low means of press seals, be particularly useful for the combination fixing ring that in the seal arrangement of electronic products such as shunting switch, uses, it is the uniform section annular ring that constitutes by flexible material, it is characterized in that this bottom, ring-like cross section is a trapezoid shaped, the shape of outer lug in top has at least together, its above and below is parallel, angle α=10 of inner side surface vertical and the bottom outside conical surface and center vertical line °-80 °.