CN202991960U

CN202991960U - Hydraulic cylinder combined sealing disc type brake

Info

Publication number: CN202991960U
Application number: CN 201220745089
Authority: CN
Inventors: 苏民
Original assignee: JIAOZUO DAHUA ENERGY MACHINERY CO Ltd
Current assignee: JIAOZUO DAHUA ENERGY MACHINERY CO Ltd
Priority date: 2012-12-31
Filing date: 2012-12-31
Publication date: 2013-06-12
Anticipated expiration: 2022-12-31

Abstract

The utility model discloses a hydraulic cylinder combined sealing disc type brake which comprises a disc spring, a cylinder body, a piston, seal rings and a friction chamber. The seal rings are embedded on the inner surface of the cylinder body and are in sliding connection with the piston, the number of the seal rings is two, each seal ring is composed of a base material, an O-shaped support ring and a retainer ring and is annular, wherein the base material is composed of two seal lips and one support ring and is of an integral structure, a cross section of the base material is of a Y-shaped structure, and a cross section of the retainer ring is of a rectangular structure. One seal lip is tightly contacted with the cylinder body, the other seal lip is tightly contacted with the piston, the O-shaped support rings are embedded into openings of the two seal lips, the inner surfaces of the retainer rings are embedded in the support rings, the embedding depth is not lower than 2/3 of the height of the retainer rings, the outer surfaces of the retainer rings extend out of the outer surfaces of the support rings and are tightly contacted with the piston, and the number of the retainer rings is at least one. The hydraulic cylinder combined sealing disc type brake is simple in structure, can further have effective supporting and guiding effect on an internal piston body, has good sealing performance and accordingly and greatly improves the device using performance and operation stability.

Description

A kind of oil hydraulic cylinder combination seal disk type braker

Technical field

The utility model relates to a kind of oil hydraulic cylinder combination seal disk type braker, belongs to the brake device technical field.

Background technique

break is mainly used in the safety brake of various machinery, its main structure is by disk spring, cylinder body, piston, the formations such as Sealing and the chamber that rubs, the hydraulic cylinder sealing element of conventional hydraulic disk type braker mainly is comprised of guide ring (band) and Sealing, wherein guide ring (band) is mainly born the support guide effect to piston, even to guarantee the relative cylinder barrel of piston gap, prevent the seal radial stress deformation, but in actual use because of the installing space restriction, the size of break axis direction can't satisfy the requirement that guide ring (band) and Sealing group are installed simultaneously, if guide ring (band) is not installed, due to factors such as gravity, the serious wear of piston is shorter working life, also there are at present the O type circle of use or Y type sealing mechanism to support, but when being used for slipper seal, O type circle quick abrasion, anti-high pressure extrusion performance is poor, and Y type sealing mechanism low pressure or vacuum state supporting effect are poor, therefore at present in the urgent need to a kind of can be simultaneously effectively to piston support guide and oil hydraulic cylinder combination seal disk type braker with good sealability.

Summary of the invention

The object of the invention just is to overcome above-mentioned deficiency, and a kind of oil hydraulic cylinder combination seal disk type braker is provided.

For achieving the above object, the present invention is achieved through the following technical solutions:

a kind of oil hydraulic cylinder combination seal disk type braker, comprise disk spring, cylinder body, piston, seal ring and the chamber that rubs, wherein seal ring is embedded in inner surface of cylinder block and is slidably connected with piston, described seal ring is at least two, described seal ring is by base material, " O " type bracing ring and back-up ring consist of and are annular, described base material is made of two sealing lips and bracing ring and is the integral type structure, its cross section is " Y " shape structure, the back-up ring cross section is rectangular configuration, one of described sealing lip and cylinder body close contact, another and piston close contact, described " O " type bracing ring is embedded in two seal lips, described back-up ring internal surface is embedded in bracing ring, and inserted depth is not less than 2/3 of back-up ring height, the back-up ring outer surface stretches out the bracing ring outer surface, and with the piston close contact, described back-up ring at least one.

It is fluorine rubber that base material and " O " type support material, and the back-up ring material is teflon.

The utility model also can play effective support guide effect to inner piston body, and have good sealability when having saving installing space characteristic simple in structure, connects operation stability thereby extended greatly the equipment usability.

Description of drawings

Fig. 1 is this new structure schematic diagram;

Fig. 2 is the local enlarged diagram of seal ring structure.

Embodiment

as shown in Figure 1, a kind of oil hydraulic cylinder combination seal disk type braker, comprise disk spring 1, cylinder body 2, piston 3, seal ring 4 and the chamber 5 that rubs, wherein seal ring 4 is embedded in cylinder body 2 internal surfaces and is slidably connected with piston 3, described seal ring 4 is at least two, described seal ring is by base material, " O " type bracing ring 6 and back-up ring 7 consists of and is annular, described base material is made of two sealing lips 8 and bracing ring 9 and is the integral type structure, its cross section is " Y " shape structure, back-up ring 7 cross sections are rectangular configuration, 8 one of described sealing lips and cylinder body 2 close contacts, another and piston 3 close contacts, described " O " type bracing ring 6 is embedded in 8 mouthfuls of two sealing lips, described back-up ring 7 internal surfaces are embedded in bracing ring 9, and inserted depth is not less than 2/3 of back-up ring 7 height, back-up ring 7 outer surfaces stretch out bracing ring 9 outer surfaces, and with piston 3 close contacts, described back-up ring 7 at least one.

Claims

1. oil hydraulic cylinder combination seal disk type braker, comprise disk spring, cylinder body, piston, seal ring and the chamber that rubs, wherein seal ring is embedded in inner surface of cylinder block and is slidably connected with piston, it is characterized in that: described seal ring is at least two, described seal ring is by base material, " O " type bracing ring and back-up ring consist of and are annular, described base material is made of two sealing lips and bracing ring and is the integral type structure, its cross section is " Y " shape structure, the back-up ring cross section is rectangular configuration, one of described sealing lip and cylinder body close contact, another and piston close contact, described " O " type bracing ring is embedded in two seal lips, described back-up ring internal surface is embedded in bracing ring, and inserted depth is not less than 2/3 of back-up ring height, the back-up ring outer surface stretches out the bracing ring outer surface, and with the piston close contact, described back-up ring at least one.

2. a kind of oil hydraulic cylinder combination seal disk type braker according to claim 1 is characterized in that: it is fluorine rubber that described base material and " O " type support material, and the back-up ring material is teflon.