CN210496847U

CN210496847U - Centrifuge scraper seal structure

Info

Publication number: CN210496847U
Application number: CN201921268697.5U
Authority: CN
Inventors: 刘涛; 熊昌武; 毕作鹏; 孙春光; 李海平
Original assignee: Rianlon Corp; Rianlon Zhongwei New Material Co ltd
Current assignee: Rianlon Corp; Rianlon Zhongwei New Material Co ltd
Priority date: 2019-08-07
Filing date: 2019-08-07
Publication date: 2020-05-12
Anticipated expiration: 2029-08-07

Abstract

The utility model provides a scraper sealing structure of a centrifugal machine, which comprises an inner bushing, a gland and a cylinder barrel, wherein the inner bushing is arranged outside a cylinder rod and forms a sealing cavity with the cylinder rod; the gland is sleeved on the cylinder rod, and a sealing assembly is arranged between the gland and the cylinder rod; the cylinder barrel is sleeved outside the inner bushing. The utility model discloses create structural design rationally, seal lip seal, space ring and general stopper through the gland and compress tightly, form the seal structure of mutually supporting, sealed long service life, the reliability is high, avoids the material to be polluted by fluid.

Description

Centrifuge scraper seal structure

Technical Field

The invention belongs to the technical field of vertical centrifuge equipment, and particularly relates to a scraper sealing structure of a centrifuge.

Background

Vertical scraper centrifuge is unloading the in-process, and the action of scraper is slowly rotatory with the reciprocating motion of slow lift, and common sealed form utilizes the sealed of tetrafluoro V type sealing ring and O type circle combination, because tetrafluoro V type sealing ring easily wears and teares at the scraper reciprocating motion in-process, does not have the elasticity compensation ability moreover, can lead to particulate material to get into the seal chamber for the wearing and tearing of O type circle, sealed life is shorter. Not only the material grinds the quality that can influence the product with the jar pole repeatedly, and on the other hand, sealing reliability is poor, and oil liquid produces the seepage in the hydro-cylinder, can lead to fluid to cause the pollution to the material, also influences the quality of product equally, consequently, needs to improve seal structure urgently.

Disclosure of Invention

In view of this, the present invention provides a scraper sealing structure of a centrifuge, which aims to overcome the defects in the prior art.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a centrifuge scraper seal structure comprising:

the inner bushing is sleeved on the outer side of the cylinder rod of the scraper lifting cylinder body, the inner wall of the inner bushing is provided with a ring groove, a sealing cavity is formed between the inner bushing and the cylinder rod, and an air inlet is formed in the side wall of the inner bushing, corresponding to the sealing cavity;

the gland is sleeved on the cylinder rod and used for compressing and fixing the inner bushing in the axial direction; a sealing assembly is arranged between the gland and the cylinder rod; the sealing assembly comprises a lip seal positioned on the outer side and a flooding plug seal positioned on the inner side, and a space ring is arranged between the lip seal and the flooding plug seal;

the cylinder barrel is sleeved on the outer side of the inner bushing, an air source connector is arranged on the cylinder barrel corresponding to the air inlet, and a first sealing element is arranged between one end of the cylinder barrel, which is different from the gland, and the cylinder rod.

Further, a second sealing element is arranged between the gland and the cylinder barrel.

Further, the second sealing element adopts an O-shaped ring.

Further, the first sealing element adopts an O-shaped ring.

Further, the inner bushing is a copper bushing.

Further, the lip seal is a tetrafluoro V-type seal or a Y-type seal.

Furthermore, two sides of the spacing ring are respectively abutted against the lip seal and the outer ring of the universal plug seal.

Furthermore, a baffle ring for positioning the flooding plug seal is arranged on the gland and props against an outer ring of an opening at the inner side of the flooding plug seal.

Furthermore, the flooding plug seal is a symmetrical two-way seal structure and comprises two U-shaped openings back to back, and a V-shaped spring is arranged in each opening; the inner ring of the U-shaped opening is matched with the lifting oil cylinder body, and the outer ring of the U-shaped opening is matched with the inner wall of the gland.

Further, the middle part of the inner wall of the flooding plug seal is provided with an arc-shaped groove, the middle part of the outer wall of the flooding plug seal is provided with an annular groove, and an O-shaped ring is installed in the annular groove.

Compared with the prior art, the invention has the following advantages:

the invention has reasonable structural design, compresses the lip seal, the spacer ring and the universal plug seal through the gland to form a sealing structure with mutual cooperation, has the capability of automatic compensation, long service life of the seal and high reliability, and avoids the material from being polluted by oil liquid.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. In the drawings:

FIG. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1;

fig. 3 is a schematic structural diagram of a flooding plug seal in the practice of the invention.

Description of reference numerals:

1-inner lining; 2-cylinder rod; 3-sealing the cavity; 4-an air inlet; 5-pressing the cover; 6-lip sealing; 7-universal plugging; 8-spacer ring; 9-a cylinder barrel; 10-gas source interface; 11-a first seal; a 12-U shaped opening; 13-V type spring; 14-a second seal; 15-a baffle ring; 16-an arc-shaped groove; 17-O-ring; 18-ring groove.

Detailed Description

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings, which are merely for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be construed as limiting the invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "connected" are to be construed broadly, e.g. as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

The invention will be described in detail with reference to the following embodiments with reference to the attached drawings.

A centrifuge scraper sealing structure, as shown in fig. 1 to 3, comprising:

the scraper lifting oil cylinder comprises an inner bushing 1, a scraper lifting oil cylinder body and a scraper lifting oil cylinder, wherein the outer side of a cylinder rod 2 of the scraper lifting oil cylinder body is sleeved with the inner bushing, a ring groove is formed in the inner wall of the inner bushing, a sealing cavity 3 is formed between the inner bushing and the cylinder rod, and an air inlet 4 is formed in the side wall of the inner bushing, corresponding to the sealing cavity;

the gland 5 is sleeved on the cylinder rod and used for compressing and fixing the inner bushing in the axial direction; a sealing assembly is arranged between the gland and the cylinder rod;

and a cylinder barrel 9 which is sleeved on the outer side of the inner bushing and is provided with an air source interface 10 corresponding to the air inlet, and a first sealing element 11 is arranged between one end of the cylinder barrel, which is different from the gland, and the cylinder rod.

The sealing component comprises a lip seal 6 positioned at the outer side and a flooding plug seal 7 positioned at the inner side, and a space ring 8 is arranged between the lip seal 6 and the flooding plug seal 7; the lip-shaped seal, the spacing ring and the universal plug seal are compressed by the gland to form a sealing structure with mutual matching action.

It should be noted that, the flooding plug seal is generally supported by teflon PTFE material, and is more wear-resistant than sealing elements such as O-shaped rings, and the generated foreign matters are less. The flooding plug seal in the invention preferably adopts a symmetrical two-way sealing structure, and comprises two back-to-back part structures, namely two U-shaped openings 12 which are back-to-back, wherein a V-shaped spring 13 is arranged in each opening and plays a role in elastic compensation; the inner ring of the U-shaped opening is matched with the lifting oil cylinder body, and the outer ring of the U-shaped opening is matched with the inner wall of the gland. According to the invention, the left sealing material and the right sealing leaked hydraulic oil are sealed by the universal plug, so that the sealing effect is good, and the product is protected from being polluted.

When the equipment works, nitrogen is introduced into the sealed cavity through the air source interface, the pressure outside the sealed cavity is normal, and the stable pressure value does not need to be established even if the material does not enter the sealed cavity as long as the sealed cavity is guaranteed to be micro-positive pressure. Generally, nitrogen can be automatically supplemented by an external control pneumatic valve, positive pressure sealing is adopted, a small amount of gas is allowed to leak along a sealing surface, and the leaked gas can just prevent dust or debris generated by abrasion of a lip seal from entering a sealing cavity.

A second sealing element 14 is arranged between the gland and the cylinder barrel. Typically, the second seal is an O-ring. The first sealing element adopts an O-shaped ring.

The inner bushing is a copper bushing. The lip seal is generally a tetrafluoro V-type seal or a Y-type seal.

The two sides of the spacing ring are respectively abutted against the lip seal and the outer ring of the flooding plug seal, the gland is provided with a baffle ring 15 for positioning the flooding plug seal, and the baffle ring is abutted against the outer ring of the opening at the inner side of the flooding plug seal, so that the seal is ensured to exert the best sealing performance.

In the sealing structure provided by the invention, the space ring is not directly contacted with the sealing surface of the cylinder rod, and actually, a purpose-made bidirectional universal plug seal and a lip seal are combined to play a role of double sealing. Just because the lip seal, the spacer ring and the flood plug seal are compressed by the gland to form the seal assembly in a combined manner, the flood plug seal can compensate under the condition that the lip seal is abraded to a certain extent along with the use of the equipment.

In an alternative embodiment, as shown in fig. 3, the inner wall of the flooding plug seal is provided with an arc-shaped groove 16 in the middle, and the outer wall of the flooding plug seal is provided with a ring groove 18 in the middle, and an O-shaped ring 17 is arranged in the ring groove. The inner wall is the inner surface formed by the inner walls of the U-shaped opening inner rings at two sides; the outer wall is the outer surface formed by the outer walls of the U-shaped opening outer rings at the two sides.

After the general stopper seals the installation, O type circle on it is compressed tightly, has the deformation volume that can resume former, can compress tightly each other all the time with general stopper seals major structure, even lip seal among the seal assembly appears certain wearing and tearing, general stopper seals major structure can be squeezed to the O type circle on the general stopper seals, makes the general stopper seal inboard arc wall rise to open (the radian is bigger, more tends to the straight state of pressing close to the cylinder rod sealed face promptly), keeps good leakproofness all the time. And the sealing ring also has acting force for extruding the outer rings at two sides, so when the sealing is worn, the O-shaped ring can expand the outer rings at two sides, the abrasion loss is automatically compensated, and the good sealing performance is kept.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements and the like, which are within the spirit and principle of the present invention, should be included in the scope of the present invention.

Claims

1. A centrifuge scraper seal structure comprising:

the gland is sleeved on the cylinder rod and used for compressing and fixing the inner bushing in the axial direction; a sealing assembly is arranged between the gland and the cylinder rod, the sealing assembly comprises a lip seal positioned on the outer side and a universal plug seal positioned on the inner side, and a space ring is arranged between the lip seal and the universal plug seal;

2. A centrifuge scraper seal structure according to claim 1, wherein: and a second sealing element is arranged between the gland and the cylinder barrel.

3. A centrifuge scraper seal structure according to claim 2, wherein: the second sealing element adopts an O-shaped ring.

4. A centrifuge scraper seal structure according to claim 1, wherein: the first sealing element adopts an O-shaped ring.

5. A centrifuge scraper seal structure according to claim 1, wherein: the inner bushing is a copper bushing.

6. A centrifuge scraper seal structure according to claim 1, wherein: the lip seal is a tetrafluoro V-shaped seal or a Y-shaped seal.

7. A centrifuge scraper seal structure according to claim 1, wherein: and two sides of the spacing ring are respectively abutted against the lip seal and the outer ring of the universal plug seal.

8. A centrifuge scraper seal structure according to claim 1, wherein: and the gland is provided with a baffle ring for positioning the flooding plug seal, and the baffle ring props against the outer ring of the opening at the inner side of the flooding plug seal.

9. A centrifuge scraper sealing structure according to any one of claims 1 to 8, wherein: the flooding plug seal is a symmetrical two-way seal structure and comprises two U-shaped openings back to back, and a V-shaped spring is arranged in each opening; the inner ring of the U-shaped opening is matched with the lifting oil cylinder body, and the outer ring of the U-shaped opening is matched with the inner wall of the gland.

10. A centrifuge scraper sealing structure according to any one of claims 1 to 8, wherein: the middle part of the inner wall of the flooding plug seal is provided with an arc-shaped groove, the middle part of the outer wall of the flooding plug seal is provided with an annular groove, and an O-shaped ring is arranged in the annular groove.