CN212480123U

CN212480123U - Single-moving-ring axial moving type packing sealing device of internal mixer

Info

Publication number: CN212480123U
Application number: CN202020760686.5U
Authority: CN
Inventors: 韦富农
Original assignee: Guangdong Weina Intelligent Internal Mixer Technology Co ltd
Current assignee: Guangdong Weina Intelligent Internal Mixer Technology Co ltd
Priority date: 2020-05-11
Filing date: 2020-05-11
Publication date: 2021-02-05
Anticipated expiration: 2030-05-11

Abstract

The utility model relates to a single-moving-ring axial moving type packing device of an internal mixer, which comprises a fixed ring, graphite, a moving ring, a gasket, a spring and a packing nut, wherein the fixed ring is fixedly arranged in the side wall glasses wall board of the internal mixer, the graphite is embedded on the end part sealing surface of the fixed ring, the moving ring and a rotor are in transition fit and provided with a key pin, the rotor drives the moving ring to synchronously rotate through the key pin when rotating, the packing nut is sleeved on the external thread of the rotor, the spring is arranged in the inner cavity of the packing nut, the torsional packing nut axially moves along the rotor, the packing nut drives the spring, the gasket and the moving ring to tightly press the sealing surface of the fixed ring along the axial movement to generate friction sealing action so as to prevent the rubber material from leaking, and simultaneously, the graphite material is embedded on the, graphene is stripped between the movable ring and the fixed ring in the mechanical contact friction sealing movement process, and the graphene is beneficial to lubrication so as to achieve the purpose of oil-free self-lubrication; the use cost is greatly reduced, and the requirements of energy conservation and environmental protection are also met; meeting the actual use requirement.

Description

Single-moving-ring axial moving type packing sealing device of internal mixer

Technical Field

The utility model relates to a banbury mixer field, concretely relates to single movable ring axial displacement type of banbury mixer compels tight sealing device.

Background

An internal mixer, also called kneading machine, mainly used for plasticating and mixing of rubber, is a mechanical equipment which is equipped with a pair of rotors with specific shapes and relatively rotating and can plasticate and mix polymer material in a clearance mode under the closed state of adjustable temperature and pressure, and is mainly formed from internal mixing chamber, rotor sealing device, feeding and pressing device, discharging device, driving device and machine base, etc. said internal mixer is environment-friendly, and the quality of mixed rubber material is good and bad, and mainly depends on rotor sealing device, mixing temperature, filling quantity, rotor rotating speed, mixing time, top-pushing bolt pressure and rotor structure, in which the rotor sealing device is one of important influencing factors, and mainly because the rotor is subjected to axial thrust, radial force, circumferential force, repeated torsion, pressure given by top-pushing bolt, friction rubber material, impact force, And the influence of temperature and the like, if the sealing device of the joint surface of the rotor and the machine body is not good, the phenomena of powder leakage and material leakage can occur, the quality of the rubber compound is influenced, and the surrounding environment is polluted, so the good and bad sealing performance of the internal mixer is one of important indexes for measuring the quality of one internal mixer.

The most used sealing device of the existing internal mixer is a fork external pressure type sealing device which is composed of a fork steel plate, a supporting spring, a small oil cylinder, a pressing end cover, a fixed ring and a movable ring; because the fork external pressure type sealing device only has two stress points when being used for pressing the outer pressure of the end cover, the external pressure balance is difficult to control and the external pressure balance is used on the pressing end cover, the static ring and the dynamic ring can not be fully contacted when the pressing end cover is unbalanced in stress, and the phenomenon of powder leakage and material leakage can occur when the dynamic ring and the static ring contact the friction sealing surface with a gap when the rotor rotates; the phenomenon of leakage can also occur when the pressure applied to the rubber compound exceeds the external pressure of the sealing device, and only one sealing contact surface is arranged between the fixed ring and the movable ring, so that the rubber compound is easy to wear and damage, and the disassembly, assembly and maintenance are not easy due to the limited space. The long-term leakage can occur during the operation, which not only causes a great deal of waste of the sizing material and increases the production cost, but also influences the field management of enterprises and can not meet the actual use requirements. In order to solve the problems, the applicant submits a patent application with the application number of 201822216578.7 and the name of double-acting ring and single-fixed ring interlocking internal pressure type sealing device to the national intellectual property office, the technical scheme recorded by the patent application can effectively prevent powder from leaking, parts do not need to be frequently maintained and replaced, and the sealing is completely realized without material leakage.

SUMMERY OF THE UTILITY MODEL

There is the defect to prior art, the utility model provides a compromise sealed good and need not to use the banbury mixer single dynamic ring axial displacement formula of lubricating oil advantage and compel tight sealing device, concrete technical scheme as follows:

a single moving ring axial moving type packing sealing device of an internal mixer comprises a fixed ring, graphite, a moving ring, a gasket, a spring and a packing nut, wherein a rotor is sequentially sleeved with the fixed ring, the moving ring, the gasket and the packing nut from inside to outside; the other end of the fixed ring is propped against the gasket, and the screwing depth of the packing nut into the rotor is adjusted so that the movable ring presses the sealing surface of the end part of the fixed ring.

As an optimized proposal of the utility model, the fixed ring, the movable ring, the gasket and the packing nut are respectively provided with two and are respectively arranged at the left end and the right end of the rotor.

As a preferred scheme of the utility model, the spring has a plurality ofly and around packing nut center pin isoperimetric circumference range.

The utility model has the advantages that: the tightening nut is twisted to axially move along the rotor, the tightening nut drives the spring, the gasket and the moving ring to axially move to tightly press the sealing surface of the fixed ring to generate a friction sealing effect so as to prevent rubber material from leaking, and meanwhile, as the graphite material is embedded on the sealing surface of the fixed ring, graphene is stripped between the moving ring and the fixed ring in the mechanical contact friction sealing movement process (the mechanical stripping method), and the graphene is beneficial to lubrication so as to achieve the purpose of oil-free self-lubrication; the use cost is greatly reduced, and the requirements of energy conservation and environmental protection are also met; meeting the actual use requirement.

Drawings

FIG. 1 is a schematic view of the sealing device of the present invention engaged with a rotor;

fig. 2 is a schematic structural view of the sealing device of the present invention;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is an exploded view of the stationary ring, the movable ring, the gasket and the packing nut of the present invention;

fig. 5 is a schematic diagram of the distribution of graphite in the stationary ring according to the present invention.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:

in the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, 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 present invention can be understood as appropriate by those of ordinary skill in the art.

As shown in fig. 1 to 5, a single moving ring axial movement type packing sealing device of an internal mixer comprises a fixed ring 1, graphite 2, a moving ring 3, a gasket 4, a spring 8 and a packing nut 5, wherein a rotor 6 is sequentially sleeved with the fixed ring 1, the moving ring 3, the gasket 4 and the packing nut 5 from inside to outside, the fixed ring 1 is fixedly installed in a spectacle wall plate of an internal mixing chamber side wall of the internal mixer, the graphite 2 is embedded on a sealing surface of the end part of the fixed ring 1, the graphite 2 is provided with a plurality of inner threads which are arranged around the central axis of the fixed ring 1, the moving ring 3 and the rotor 6 are in transition fit and provided with a key pin 7, the moving ring 3 is driven to synchronously rotate by the key pin 7 when the rotor 6 rotates, the packing nut 5 is sleeved on an external thread of the rotor, the internal thread which is matched with the external thread of the rotor is arranged inside the packing nut 5, the spring 8 is installed in an inner cavity of the; the other end is abutted against the gasket 4, and the screwing depth of the packing nut 5 into the rotor is adjusted so that the movable ring 3 is pressed against the sealing surface of the end part of the fixed ring.

Specifically, the fixed ring 1, the moving ring 3, the gasket 4 and the packing nut 5 are respectively provided with two parts and respectively installed at the left end and the right end of the rotor, and the rotor is sealed from the left side and the right side.

Specifically, the springs 8 are arranged in an equi-circle manner around the central shaft of the packing nut 5, so that sufficient elasticity and stress balance are ensured.

In conclusion, the torsion packing nut 5 moves along the axial direction of the rotor, the packing nut 5 drives the spring 8, the gasket 4 and the moving ring 3 to move along the axial direction to press the sealing surface of the fixed ring to generate a friction sealing effect so as to prevent the leakage of rubber materials, and meanwhile, as the graphite materials are embedded on the sealing surface of the fixed ring 1, graphene is naturally produced between the moving ring and the fixed ring in the mechanical contact friction sealing process (the mechanical stripping method) so as to achieve the purpose of oil-free self-lubrication; the use cost is greatly reduced, and the requirements of energy conservation and environmental protection are also met; meeting the actual use requirement.

The above description is provided for the purpose of describing the present invention in more detail with reference to the preferred embodiments, and it should not be construed that the present invention is limited to these descriptions, and it will be apparent to those skilled in the art that the present invention can be implemented in many ways without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides a single movable ring axial displacement formula of banbury mixer is compeled tight sealing device which characterized in that: the rotor is sequentially sleeved with the fixed ring, the movable ring, the gasket and the packing nut from inside to outside, the fixed ring is fixedly installed in a side wall glasses wallboard of an internal mixer, the graphite is embedded on a sealing surface of the end part of the fixed ring, the movable ring and the rotor are in transition fit and provided with a key pin, the rotor drives the movable ring to synchronously rotate through the key pin when rotating, the packing nut is sleeved on an external thread of the rotor, a spring is installed in an inner cavity of the packing nut, and one end of the spring props against the inner wall of the packing nut; the other end of the fixed ring is propped against the gasket, and the screwing depth of the packing nut into the rotor is adjusted so that the movable ring presses the sealing surface of the end part of the fixed ring.

2. The single-acting ring axially moving type packing sealing device of an internal mixer according to claim 1, wherein: the fixed ring, the movable ring, the gasket and the packing nut are respectively provided with two parts and are respectively arranged at the left end and the right end of the rotor.

3. The single-acting ring axially moving type packing sealing device of an internal mixer according to claim 1, wherein: the springs are arranged in a plurality of equal circumferences around the central shaft of the packing nut.