CN203115102U

CN203115102U - Scraper seal

Info

Publication number: CN203115102U
Application number: CN2013201258327U
Authority: CN
Inventors: 綦建前
Original assignee: Beijing Jinzi Tiancheng Hydraulic Technology Co Ltd
Current assignee: Beijing Jinzi Tiancheng Hydraulic Technology Co Ltd
Priority date: 2013-03-19
Filing date: 2013-03-19
Publication date: 2013-08-07
Anticipated expiration: 2023-03-19

Abstract

The utility model discloses a scraper seal which comprises a lip-shaped dustproof inner ring (1). A scraper seal outer ring (2) is arranged on the outer wall of the lip-shaped dustproof inner ring (1), and a supporting sliding ring (3) is arranged on the inner diameter of the lip-shaped dustproof inner ring (1). The scraper seal adopts the lip-shaped dustproof inner ring to enable the scraper seal to have good dust scraping capability, and by being provided with the scraper seal outer ring and manufacturing the lip-shaped dustproof inner ring with polyformaldehyde or modified nylon or finn aldehyde resin or polyimide, the mechanical strength of the lip-shaped dustproof inner ring to is made to be greatly improved. In addition, the supporting sliding ring is arranged on the inner diameter of the lip-shaped dustproof inner ring, the contact area of the supporting sliding ring and the outer side face of a piston rod is larger than the contact area of the lip-shaped dustproof inner ring and the outer side face of the piston rod, so that friction durability of the lip-shaped dustproof inner ring is improved, friction of the lip-shaped dustproof inner ring is reduced, and the scraper seal also has the functions of secondary dust scraping and absorbing of certain impurities leaked by scraping of the lip-shaped dustproof inner ring. Therefore, the dustproof performance and the service life of the scraper seal are prolonged, and the service life of an oil cylinder is guaranteed.

Description

A kind of dust ring

Technical field

The utility model relates to a kind of dust ring, particularly a kind of dust ring for hydraulic jack or cylinder.

Background technique

In the prior art, the working life of a lot of large-scale servo-cylinders is shorter, and the reason that influences large-scale servo-cylinder working life has a lot.But, most important reason caused owing to dust ring loses efficacy, thereby caused the outer impurity of cylinder to enter in the cylinder by dust ring because dust ring loses efficacy, scratch wearing and tearing seal ring, guide ring, piston rod, oil cylinder casing wall etc., cause the internal and outernal leakage of working medium, the damage of oil cylinder, inefficacy.

Existing dust ring adopts rubber, polyurethane, polytetrafluoroethylene packing etc. mostly; Structurally adopt lip type and combination form mostly.The dust ring dust blowing ability of analyzing lip type structure as can be known from structure is better, but adopts modified rubber, modified polyurethane elastomeric material mostly on material, and these mechanical strength are strong inadequately, can not the abominable outer impurity of cylinder of fine removing environment.Though and the mechanical strength of combined dust ring is enough, but structural type is bad, it is indifferent that combined dust ring is scraped the outer impurity of row's cylinder, the outer impurity of cylinder be easy to enter between piston rod and the cylinder cap passive movement faster piston rod bring in the cylinder, cause scratch, the seal ring of grinding away, guide ring, piston rod, oil cylinder casing wall, make the working medium internal and outernal leakage, last oil cylinder damages and lost efficacy, even bring disaster to hydraulic system, valve damage, bring about great losses.

The model utility content

The purpose of this utility model is, a kind of dust ring is provided, and it has the dust-tight effect, also has higher mechanical strength in addition, has not fragile and characteristics long service life.

The technical solution of the utility model: a kind of dust ring, comprise the lip inner ring that prevents dust, the outer wall of the dustproof inner ring of lip is provided with the dust ring outer shroud, and the internal diameter of the dustproof inner ring of lip is provided with supporting slip ring.

In the aforesaid this dust ring, the material of the dustproof inner ring of lip is polyoxymethylene, modification of nylon, fragrant urea formaldehyde or the poly-imines that mills.Polyoxymethylene, modification of nylon, fragrant urea formaldehyde and poly-ly mill imines and all have the good advantage of mechanical strength, but also have certain mechanical elasticity, adopt the dustproof inner ring of lip of this material to have better mechanical strength.

In the aforesaid this dust ring, the material of dust ring outer shroud is the rustproof spring steel plate.

In the aforesaid this dust ring, the material of supporting slip ring is polytetrafluoroethylene packing.

In the aforesaid this dust ring, the lip type position of the dustproof inner ring of lip and supporting slip ring surface of contact is round surface.

Compared with prior art, the utility model adopts the dustproof inner ring of lip to make dust ring have good dust blowing ability, by the dust ring outer shroud being set and adopting polyoxymethylene, modification of nylon, fragrant urea formaldehyde or the poly-imines that mills is made the dustproof inner ring of lip the mechanical strength of the dustproof inner ring of lip is greatly improved.

In addition, internal diameter at the dustproof inner ring of lip arranges supporting slip ring, the area of contact of supporting slip ring and piston rod outer side surface is greater than the dustproof inner ring of lip and piston rod outer side surface area of contact, improving the dustproof inner ring of lip friction durability, to reduce the dustproof inner ring friction of lip, and the secondary dust blowing is also arranged and receive certain lip inner ring that prevents dust to scrape Lou impurity effect.Thereby improve anti-dust performance and the life-span of dust ring, to ensure the working life of oil cylinder.

Description of drawings

Fig. 1 is structural representation of the present utility model.

Being labeled as in the accompanying drawing: the 1-lip inner ring that prevents dust, 2-dust ring outer shroud, 3-supporting slip ring, 4-cylinder cap.

Embodiment

Below in conjunction with drawings and Examples the utility model is further described.

Embodiment 1 of the present utility model: as shown in Figure 1, a kind of dust ring comprises the lip inner ring 1 that prevents dust, and the outer wall of the dustproof inner ring 1 of lip is provided with dust ring outer shroud 2, and the internal diameter of the dustproof inner ring 1 of lip is provided with supporting slip ring 3.The excircle part of the dustproof inner ring 1 of lip and dust ring outer shroud 2 embeds in the groove of cylinder cap 4.

The material of the dustproof inner ring 1 of lip is polyoxymethylene, and the material of dust ring outer shroud 2 is the rustproof spring steel plate.

The material of supporting slip ring 3 is polytetrafluoroethylene packing.The dustproof inner ring 1 of lip is round surface with the lip type position of supporting slip ring 3 surface of contact.

Embodiment 2 of the present utility model: as shown in Figure 1, a kind of dust ring comprises the lip inner ring 1 that prevents dust, and the outer wall of the dustproof inner ring 1 of lip is provided with dust ring outer shroud 2, and the internal diameter of the dustproof inner ring 1 of lip is provided with supporting slip ring 3.The excircle part of the dustproof inner ring 1 of lip and dust ring outer shroud 2 embeds in the groove of cylinder cap 4.

The material of the dustproof inner ring 1 of lip is modification of nylon, and the material of dust ring outer shroud 2 is the rustproof spring steel plate.

Embodiment 3 of the present utility model: as shown in Figure 1, a kind of dust ring comprises the lip inner ring 1 that prevents dust, and the outer wall of the dustproof inner ring 1 of lip is provided with dust ring outer shroud 2, and the internal diameter of the dustproof inner ring 1 of lip is provided with supporting slip ring 3.The excircle part of the dustproof inner ring 1 of lip and dust ring outer shroud 2 embeds in the groove of cylinder cap 4.

The material of the dustproof inner ring 1 of lip is fragrant urea formaldehyde, and the material of dust ring outer shroud 2 is the rustproof spring steel plate.

Embodiment 4 of the present utility model: as shown in Figure 1, a kind of dust ring comprises the lip inner ring 1 that prevents dust, and the outer wall of the dustproof inner ring 1 of lip is provided with dust ring outer shroud 2, and the internal diameter of the dustproof inner ring 1 of lip is provided with supporting slip ring 3.The excircle part of the dustproof inner ring 1 of lip and dust ring outer shroud 2 embeds in the groove of cylinder cap 4.

The material of the dustproof inner ring 1 of lip mills imines for poly-, and the material of dust ring outer shroud 2 is the rustproof spring steel plate.

Claims

1. dust ring comprises the lip inner ring (1) that prevents dust, and it is characterized in that: the prevent dust outer wall of inner ring (1) of lip is provided with dust ring outer shroud (2), and the prevent dust internal diameter of inner ring (1) of lip is provided with supporting slip ring (3).

2. a kind of dust ring according to claim 1 is characterized in that: the prevent dust material of inner ring (1) of described lip is polyoxymethylene, modification of nylon, fragrant urea formaldehyde or the poly-imines that mills.

3. a kind of dust ring according to claim 1, it is characterized in that: the material of dust ring outer shroud (2) is the rustproof spring steel plate.

4. a kind of dust ring according to claim 1, it is characterized in that: the material of supporting slip ring (3) is polytetrafluoroethylene packing.

5. a kind of dust ring according to claim 1 is characterized in that: the prevent dust lip type position of inner ring (1) and supporting slip ring (3) surface of contact of lip is round surface.