CN201858353U

CN201858353U - L-O-combined-shaped sealing part

Info

Publication number: CN201858353U
Application number: CN201020595247XU
Authority: CN
Inventors: 孔祥博; 孟庆国; 王万军
Original assignee: ZIBO AIKE SEAL COMPONENTS CO Ltd
Current assignee: ZIBO AIKE SEAL COMPONENTS CO Ltd
Priority date: 2010-10-28
Filing date: 2010-10-28
Publication date: 2011-06-08
Anticipated expiration: 2020-10-28

Abstract

An L-O-combined-shaped sealing part belongs to the field of combined sealing parts and comprises an O-shaped seal ring (2). The L-O-combined-shaped sealing part is characterized in that a sealing piece (1) with an L-shaped section is arranged outside the O-shaped seal ring (2), the inner surface of the sealing piece (1) is arc-shaped and contacts with the surface of the O-shaped seal ring (2) in a semi-contained manner, and the outer surface of the sealing piece (1) directly contacts with an operating surface. A lip of the L-O-combined-shaped sealing part is more reasonable in stress due to unique combined section design. The L-O-combined-shaped sealing part has the advantages that the L-O-combined-shaped sealing part is firm in fixation, avoids separation of a main sealing piece and an auxiliary sealing piece when in impact load, is convenient in installation and detachment and uniform in stress, and the like, and can more effectively give full play of advantages of materials of the sealing part and avoid shortcomings of the materials of the sealing part. As known from repeated experiments, operating pressure of the L-O-combined-shaped sealing part can be improved by 30% to be higher than 65MPa, and the service life of the sealing part is prolonged.

Description

LO shape combination seal

Technical field

LO shape combination seal belongs to the combination seal field, is specifically related to a kind of LO shape combination seal.

Background technique

In recent years, along with the develop rapidly of science and technology, the innovation of manufacturing industry technology, equipment is maked rapid progress, must be suitable mutually with the special operation condition condition as the Sealing of mechanical movement auxiliary element.All compare badly as working environment under the coal mine and working condition, the working condition that promptly requires Sealing to be suitable for is harsh, particularly demanding compression resistance, traditional single-piece sealing can not be satisfied its seal request, and the Glais ring of combination etc. can not satisfy the requirement at some position under the special operation condition condition; Owing to the wearing and tearing of cylinder body, accessory can not be suitable at random, and requires Sealing that enough elasticity surpluses also will be arranged simultaneously.That is to say, need novel Sealing in the actual production.

Summary of the invention

The technical problems to be solved in the utility model is: overcome the deficiencies in the prior art, provide a kind of wear-resisting, have stressed reasonable, fixed, not easily separated, the easy installation and removal of enough elasticity surplus, lip, a stressed uniform LO shape combination seal.

The technological scheme that its technical problem that solves the utility model adopts is: this LO shape combination seal, comprise O-ring seals, it is characterized in that: the O-ring seals outside is provided with the L-shaped seal in cross section, the seal internal surface is curved, form half containment type with the O-ring seals surface and contact, the seal outer surface directly contacts working surface.

Described seal is that filled polytetrafluoroethylene is made, and O-ring seals is that nitrile butadiene rubber is made.Because seal directly contacts working surface, adopt filled polytetrafluoroethylene can strengthen performances such as it is wear-resisting, high temperature resistant, high pressure, and O-ring seals can guarantee enough elasticity surpluses.

Compared with prior art, the beneficial effect that the utility model had is:

1, innovates from aspects such as sealing principle, sealed sections, Cross section Design adopts the L shaped O shape combined type cross section that adds, and externally L shaped, O shape is in inside, making the cross section is that L shaped seal forms half containing state to O-ring seals, directly the seal lip that contacts with working surface is stressed more reasonable, fixed, makes Sealing that main and auxiliary seal can not take place when being subjected to impact load and separates, and installation, convenient disassembly, owing to be that containing is stressed, Sealing is when being subjected to external force, and is stressed more even again;

2, seal adopts the filled polytetrafluoroethylene material, has good performance such as wear-resisting, high pressure resistant, high temperature resistant, O-ring seals adopts nitrile rubber to make, and the better elastic performance is arranged, and makes Sealing have enough elasticity surpluses, the assembly parts that both constitute can better be brought into play the advantage of sealing member material, avoid the weakness of material, learn that through testing repeatedly its working pressure can improve 30%, bring up to more than the 65MPa, seal durability improves.

Description of drawings

Fig. 1 is the utility model plan view schematic representation.

Wherein: 1, seal 2, O-ring seals.

Fig. 1 is a most preferred embodiment of the present utility model, is described further below in conjunction with 1 pair of the utility model of accompanying drawing:

Embodiment

With reference to accompanying drawing 1:

This LO shape combination seal, form by seal 1 and O-ring seals 2, seal 1 cross section is L-shaped, be loaded on O-ring seals 2 outsides, seal 1 internal surface is curved, contact with O-ring seals 2 surface, and form half containment type with the surface of O-ring seals 2 and contact, seal 1 outer surface directly contacts working surface.Seal 1 is made for filled polytetrafluoroethylene, and O-ring seals 2 is made for nitrile butadiene rubber.

Working procedure is as follows:

During use, the utility model is installed on the hydraulic support under the coal mine, realizes the sealing of hydraulic support.Because the L shaped O shape combined type cross section that adds is adopted in the cross section, the L-shaped seal 1 in cross section externally, O-ring seals 2 is in inside, make 1 pair of O-ring seals of seal 2 form half containing state, the seal 1 that filled polytetrafluoroethylene is made directly contacts with working surface, increase the wear resistance of Sealing, the O-ring seals 2 that nitrile butadiene rubber is made can guarantee the elasticity surplus that Sealing is enough, both are in conjunction with making the lip of Sealing stressed more reasonable, fixed, Sealing can not led when being subjected to impact load, the situation that auxilliary seal separates, and install, convenient disassembly, owing to be that containing is stressed, Sealing is when being subjected to external force again, stressed more even, every index all satisfies technical requirements.Draw by the repetition test on coal mine lower support frame coal-face: its working pressure can improve 30%, brings up to more than the 65MPa, and seal durability improves greatly.

The utility model mainly is from the innovation of aspects such as sealing principle, sealed section, makes the stressed more reasonable of Sealing lip, can better bring into play the advantage of sealing member material, avoids the weakness of material, thereby has obtained technical innovation and breakthrough.

The above, it only is preferred embodiment of the present utility model, be not to be the restriction of the utility model being made other form, any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solutions of the utility model content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment did, still belongs to the protection domain of technical solutions of the utility model according to technical spirit of the present utility model.

Claims

1.LO shape combination seal, comprise O-ring seals (2), it is characterized in that: O-ring seals (2) outside is provided with the L-shaped seal in cross section (1), seal (1) internal surface is curved, form half containment type with O-ring seals (2) surface and contact, seal (1) outer surface directly contacts working surface.

2. LO shape combination seal according to claim 1 is characterized in that: described seal (1) is made for filled polytetrafluoroethylene, and O-ring seals (2) is made for nitrile butadiene rubber.