Three-layer dynamic and static ring type internal mixer

Abstract

The utility model discloses a three-layer dynamic and static ring type internal mixer, and relates to the technical field of rubber internal mixers.The three-layer dynamic and static ring type internal mixer comprises a box body and an internal mixer rotor rotationally arranged in the box body, a mechanical sealing structure is arranged at the rotational connection position of the box body and the internal mixer rotor, the mechanical sealing structure is composed of an internal mixer movable ring and an internal mixer static ring, and a contact friction part is axially formed between the internal mixer movable ring and the internal mixer static ring; the contact friction part is filled with oil, the annular spacing pad is arranged in the contact friction part and between the internal mixer movable ring and the internal mixer static ring, the length of the spacing pad is smaller than that of the contact friction part, and a plurality of axially-communicated oil passages are formed in the spacing pad. The spacing pad capable of sliding in the axial direction is additionally arranged between the internal mixer movable ring and the internal mixer static ring, a flowing path of lubricating oil is provided for sealing leakage of rubber materials, the spacing pad slides to have a strong sealing effect, and the hidden danger of rubber leakage is reduced; the spacer pad is arranged to be in a split shape, and the conduction sectional area of lubricating oil in the oil passage is changed in a staggered mode through rotation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of rubber internal mixers, in particular to a three-layer dynamic and static ring type internal mixer. BACKGROUND

[0002] A tire internal mixer is an indispensable key equipment in the production process of rubber tires, and its core role is to efficiently mix rubber raw materials and various additives to prepare uniform and stable rubber compounds meeting the requirements of tire production. The tire internal mixer mainly comprises an internal mixing chamber, a rotor, a rotor sealing device, a feeding and pressing device, a discharging device, a transmission device and a base, and its core working principle is that a pair of special-shaped rotors rotating towards each other in a closed internal mixing chamber mechanically act on the raw materials. When the rotors rotate at high speed, various complex forces such as shearing, extrusion and overturning are generated on the materials, so that the rubber, plastic particles and various additives are rapidly dispersed, redistributed and uniformly mixed under the high-intensity mixing action; at the same time, due to the relative sealing of the internal mixing chamber, the temperature of the materials rapidly rises under the double action of frictional heating and external heating system, thereby accelerating the chemical reaction between the materials and preliminarily shaping the properties of the materials to lay a foundation for subsequent processing procedures.

[0003] The sealing mechanism of the existing tire internal mixer mainly relies on the contact friction between the dynamic ring and the static ring, and lubricating oil is injected therebetween to seal the rubber in the internal mixing chamber and prevent leakage; however, this sealing method has exposed a significant problem in actual application: once the surfaces of the dynamic ring and the static ring are worn due to long-time friction or improper operation, and the wear degree is uneven, a small gap is easily formed between the two during high-speed rotation, which serves as a potential leakage point and provides an opportunity for rubber leakage, thereby seriously affecting the sealing effect and causing the tire internal mixer to have an unavoidable rubber leakage risk during use. Therefore, how to improve the sealing mechanism of the tire internal mixer, improve the wear resistance and sealing performance of the dynamic ring and the static ring, and control the flow of oil have become problems to be solved at present. SUMMARY

[0004] The device provides a three-layer dynamic and static ring type internal mixer, and the specific implementation manner is as follows:

[0005] A three-layer dynamic and static ring type internal mixer comprises:

[0006] The box body and the internal mixer rotor rotating in the box body are provided with a mechanical sealing structure at the rotating joint thereof;

[0007] The mechanical sealing structure is composed of an internal mixer dynamic ring and an internal mixer static ring, and an contact friction part is formed axially between the two, and the contact friction part is filled with oil;

[0008] The spacer pad is annularly arranged between the contact friction part, the dynamic ring and the static ring of the internal mixer, the length of the spacer pad is less than the length of the contact friction part, and a plurality of oil liquid passages axially communicated are arranged on the spacer pad, the spacer pad is equivalent to additional alternative loss under the premise of not affecting the effect of lubricating oil, and the spacer pad moves along the side with greater resistance to replace the gap.

[0009] Preferably, the spacer pad is a single structure, and the oil liquid passages are uniformly arranged equidistantly along the circumference thereof.

[0010] Based on the above technical scheme, by additionally arranging an axially freely slidable spacer pad between the dynamic ring and the static ring of the internal mixer, not only is a non-resistance flow path provided for the lubricating oil, thereby effectively sealing the rubber material that may leak in the mixing chamber and ensuring the cleanliness and efficiency of the production process; in the process of axial sliding, excellent sealing performance is also exhibited, and the unique sliding mechanism can seal the gap between the dynamic ring and the static ring, thereby greatly reducing the risk of rubber material leakage and providing more stable and reliable protection for rubber mixing operations.

[0011] Preferably, the spacer pad is a split type splicing structure composed of a first ring body and a second ring body, both of which are provided with transition holes along the circumference, and the first ring body and the second ring body are rotationally connected, and the size of the oil guide hole is adjusted by changing the misalignment corresponding relationship of the transition holes.

[0012] Preferably, the first ring body and the second ring body are in a multi-angle splicing structure of concave-convex shape, and are locked in connection by a positioning pin.

[0013] Based on the above technical scheme, the spacer pad is designed as a split structure, which has the function of misalignment adjustment by simple rotation, thereby enriching the regulation means of the oil liquid passage; specifically, by rotating each split part of the spacer pad, the relative positions of the split parts can be flexibly changed, thereby effectively adjusting the conduction cross-sectional area of the oil liquid passage, the misalignment adjustment mechanism not only provides more diversified path selection for the flow of oil liquid, but also gives the ability to accurately regulate the flow of oil liquid under different production demands, thereby enhancing the flexibility and adaptability of the internal lubrication system of the internal mixer.

[0014] Preferably, the number of transition holes on the first ring body is less than the number of transition holes on the second ring body, and a positioning cylinder is inserted between the transition holes on any first ring body and second ring body.

[0015] Preferably, the end of the positioning cylinder is provided with a positioning ring, and the corresponding part of the transition hole is provided with a counterbore.

[0016] Based on the above technical scheme, the positioning ring is arranged to realize the positioning and installation of the positioning cylinder on the transition hole, and the counterbore-shaped transition hole can realize the sinking installation of the positioning ring.

[0017] Preferably, an annular oil cavity is formed between the first ring body and the second ring body, and different forms of sealing bands are additionally arranged in the annular oil cavity, and the oil liquid conduction cross-sectional area of the transition hole is adjusted by changing the number of the sealing bands, wherein the sealing bands have two arrangement forms, which are:

[0018] Firstly, a spiral-direction sealing band is wound in the annular oil cavity, and the end portion of the spiral-direction sealing band abuts against each transition hole.

[0019] Secondly, a helical-direction sealing band is arranged in the annular oil cavity in the axial direction.

[0020] In summary, the present application has the following beneficial technical effects:

[0021] 1. The utility model discloses a interval pad between the dynamic ring and the static ring of the internal mixer is additionally arranged axially slidable, which not only has a lubricating oil flow path to seal the rubber leakage in the mixing chamber, but also has a strong sealing effect by sliding the interval pad, thereby reducing the rubber leakage risk.

[0022] 2. The interval pad is set in a split type, and the conduction cross-sectional area of the oil liquid passage can be changed by rotating and staggering.

[0023] 3. The utility model discloses a simple structure, which can change the winding number of the spiral-direction sealing band after transforming the interval pad, so that the end portion of the spiral-direction sealing band acts on the transition hole, partially covers the hole diameter of the transition hole, and changes the oil liquid flow capacity of the transition hole.

[0024] 4. The utility model discloses a simple structure, which can change the winding number of the spiral-direction sealing band after transforming the interval pad, so that the end portion of the spiral-direction sealing band acts on the transition hole, partially covers the hole diameter of the transition hole, and changes the oil liquid flow capacity of the transition hole. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is a structure diagram of the two-layer dynamic and static ring in the existing internal mixer;

[0026] Figure 2 is a sectional view of the structure of the utility model;

[0027] Figure 3 is a structure diagram of the interval pad application mode one in the utility model;

[0028] Figure 4 is a structure diagram of the interval pad application mode two in the utility model;

[0029] Figure 5 is the utility model Figure 4A cross-sectional view of a middle left view structure;

[0030] Figure 6 The utility model discares Figure 4 A cross-sectional view of a middle right view structure;

[0031] Figure 7 The utility model discares Figure 1 ;

[0032] Figure 8 The utility model discares Figure 2 ;

[0033] Figure 9 A cross-sectional view of a middle right view structure;

[0034] Explanation of reference signs:

[0035] 1, first ring body, 2, second ring body, 3, oil passage, 4, positioning cylinder, 5, whirring sealing band, 6, screwing sealing band, 7, annular oil cavity, 8, spacer pad, 10, mixer rotor, 11, box, 12, mixer dynamic ring, 13, mixer static ring, 14, contact friction part,

[0036] 301, transition hole, 401, positioning ring. Specific implementation

[0037] The utility model discloses a specific implementation mode in combination with the drawings and examples as follows:

[0038] It is to be noted that the structure, proportion, size and the like shown in the drawings of the present specification are merely used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and are not used to limit the implementation conditions of the utility model, and any modification of structure, change of proportion relationship or adjustment of size, which does not affect the effects and purposes of the utility model, should still fall within the scope of the disclosed technical content.

[0039] Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in the present specification are merely for the convenience of clear description, and are not used to limit the implementation scope of the utility model, and the change or adjustment of relative relationship, without substantial change of technical content, should also be considered as the implementation scope of the utility model.

[0040] The following will combine the drawings and Figures 1-9 The present application is further described in detail.

[0041] The utility model discloses a three-layer dynamic and static ring type mixer.

[0042] Embodiment 1

[0043] With reference to Figures 1 to 3 The embodiment discloses a three-layer dynamic and static ring type internal mixer, which comprises a box body 11 and an internal mixer rotor 10 rotatably arranged in the box body 11, and a mechanical sealing structure is arranged at the rotation joint of the two, wherein the mechanical sealing structure is composed of an internal mixer dynamic ring 12 and an internal mixer static ring 13, an axial contact friction part 14 is formed between the two, the contact friction part 14 is filled with oil, and an annular spacing pad 8 is further arranged between the contact friction part 14, the internal mixer dynamic ring 12 and the internal mixer static ring 13, the length of the spacing pad 8 is less than the length of the contact friction part 14, and a plurality of oil liquid passages 3 passing through in the axial direction are formed in the spacing pad 8, the spacing pad 8 is equivalent to additional alternative loss under the premise of not affecting the effect of lubricating oil, and when the unilateral resistance increases, the spacing pad 8 moves to the side with greater resistance to replace the gap.

[0044] Specific implementation process: when the surfaces of the internal mixer dynamic ring 12 and the internal mixer static ring 13 are not worn uniformly, a gap is easily formed during rotation, causing glue leakage; at this time, the unilateral resistance increases, and the spacing pad 8 moves to the side with greater resistance, thereby being able to replace the gap.

[0045] Embodiment 2

[0046] With reference to Figures 2 to 3 Based on the embodiment 1, the embodiment discloses a three-layer dynamic and static ring type internal mixer, the spacing pad 8 is a monomer structure, the oil liquid passages 3 are uniformly and equidistantly arranged along the circumference of the spacing pad 8, and the oil filled in the contact friction part 14 flows through the oil liquid passages 3.

[0047] Embodiment 3

[0048] With reference to Figures 4 to 6 Based on the embodiment 1, the embodiment discloses a three-layer dynamic and static ring type internal mixer, the spacing pad 8 is a split type splicing structure composed of a first ring body 1 and a second ring body 2, the two are both provided with a transition hole 301 in the circumferential direction, the first ring body 1 and the second ring body 2 are rotationally connected, and the size of the oil guide hole is adjusted by changing the dislocation corresponding relationship of the transition hole 301.

[0049] The first ring body 1 and the second ring body 2 are connected through a plurality of concave-convex and multi-angle splicing structures, and are locked by positioning pins, the number of transition holes 301 on the first ring body 1 is less than that on the second ring body 2, positioning cylinders 4 are arranged between any transition hole 301 on the first ring body 1 and the second ring body 2, the end of the positioning cylinder 4 is provided with a positioning ring 401, the transition hole 301 is provided with a counterbore corresponding to the positioning ring 401, and the first ring body 1 and the second ring body 2 in the structure are different in the number of other transition holes 301 corresponding to the transition holes 301 used for positioning, so that the oil flow capacity can be changed as a whole.

[0050] Embodiment 4

[0051] With reference to Figures 7 to 8 Based on embodiment 1, the embodiment discloses a three-layer dynamic and static ring type internal mixer, and an annular oil cavity 7 is formed between the first ring body 1 and the second ring body 2, and a spiral-direction sealing band 5 is wound in the annular oil cavity 7, the end of the spiral-direction sealing band 5 abuts against each transition hole 301 in the structure, the winding number of the spiral-direction sealing band 5 is changed in the structure, the end of the spiral-direction sealing band 5 acts on the transition hole 301, the hole diameter of the transition hole 301 is partially covered, and then the oil flow capacity of the transition hole 301 is changed.

[0052] Embodiment 5

[0053] With reference to Figure 2 and Figure 9 Based on embodiment 1, the embodiment discloses a three-layer dynamic and static ring type internal mixer, and an annular oil cavity 7 is formed between the first ring body 1 and the second ring body 2, and a spiral-direction sealing band 5 is wound in the annular oil cavity 7, the winding number of the spiral-direction sealing band 5 is changed in the structure, the end of the spiral-direction sealing band 5 abuts against each transition hole 301 in the structure, the hole diameter of the transition hole 301 is partially covered, and then the oil flow capacity of the transition hole 301 is changed.

[0054] Many other changes and modifications can be made to the application without departing from the spirit and scope of the application. It should be understood that the application is not limited to the specific embodiments described herein, but only limited by the scope of the appended claims.

Claims

1. A three-layer dynamic-static ring internal mixer, characterized by, The utility model relates to a mechanical seal structure of internal mixer, including: A box (11) and a mixer rotor (10) rotatably arranged in the box (11), and a mechanical seal structure is arranged at the rotatable joint of the two; The mechanical seal structure is composed of a dynamic ring (12) and a static ring (13), and an oil contact friction part (14) is formed axially between the two, and the oil contact friction part (14) is filled with oil; Further comprising a spacer pad (8) arranged annularly between the dynamic ring (12) and the static ring (13) in the oil contact friction part (14), the length of the spacer pad (8) is less than the length of the oil contact friction part (14), and a plurality of oil passages (3) axially communicated are arranged on the spacer pad (8), the spacer pad (8) is equivalent to an additional alternative loss without affecting the lubricating oil effect, and when the unilateral resistance increases, the spacer pad (8) moves to the side with greater resistance to replace the gap.

2. A three-stage static / dynamic ring type internal mixer according to claim 1, characterized in that, The spacer pad (8) is a single structure, and the oil passages (3) are uniformly arranged equidistantly along the circumference.

3. A three-stage static / dynamic ring type internal mixer according to claim 1, characterized in that, The spacer pad (8) is a split splicing structure composed of a first ring body (1) and a second ring body (2), both of which are provided with transition holes (301) along the circumference, the first ring body (1) and the second ring body (2) are rotatably connected, and the size of the oil guide hole is adjusted by changing the misalignment corresponding relationship of the transition holes (301).

4. A three-stage static / dynamic ring type internal mixer according to claim 3, characterized in that, The first ring body (1) and the second ring body (2) are a multi-angle splicing structure with concave-convex shape, and are locked in connection by a positioning pin.

5. A three-stage static / dynamic ring type internal mixer according to claim 4, characterized in that, The number of the transition holes (301) on the first ring body (1) is less than that on the second ring body (2), and a positioning cylinder (4) is arranged between the transition holes (301) on any first ring body (1) and second ring body (2).

6. A three-stage static / dynamic ring type internal mixer according to claim 5, characterized in that The end of the positioning cylinder (4) is provided with a positioning ring (401), and the corresponding position of the transition hole (301) is provided with a counterbore.

7. A three-stage static / dynamic ring type internal mixer according to claim 3, wherein An annular oil cavity (7) is formed between the first ring body (1) and the second ring body (2), a spiral sealing band (5) is wound in the annular oil cavity (7), and the end of the spiral sealing band (5) abuts against each transition hole (301).

8. A three-stage static / dynamic ring type internal mixer according to claim 3, wherein A helical sealing band (6) is arranged axially in the annular oil cavity (7).

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