CN117561157A - Sealing device for a rotary shaft of a kneader - Google Patents

Sealing device for a rotary shaft of a kneader Download PDF

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Publication number
CN117561157A
CN117561157A CN202180099889.1A CN202180099889A CN117561157A CN 117561157 A CN117561157 A CN 117561157A CN 202180099889 A CN202180099889 A CN 202180099889A CN 117561157 A CN117561157 A CN 117561157A
Authority
CN
China
Prior art keywords
seal
viscous
rotating portion
thread
rotation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202180099889.1A
Other languages
Chinese (zh)
Inventor
S·伯恩萨特
A·焕相
J·特伦布利耶
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie Generale des Etablissements Michelin SCA
Original Assignee
Compagnie Generale des Etablissements Michelin SCA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Compagnie Generale des Etablissements Michelin SCA filed Critical Compagnie Generale des Etablissements Michelin SCA
Publication of CN117561157A publication Critical patent/CN117561157A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/02—Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
    • B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
    • B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
    • B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
    • B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00—Mixing; Kneading
    • B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
    • B29B7/58—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/254—Sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/40—Sealings between relatively-moving surfaces by means of fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/44—Free-space packings
    • F16J15/447—Labyrinth packings
    • F16J15/4472—Labyrinth packings with axial path

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sealing Devices (AREA)

Abstract

A sealing device (123) for a rotary shaft (1) of a kneader; the rotating shaft (1) has a rotating shaft diameter (1D) and a rotating axis (1C); the sealing device (123) is provided with a first adhesive seal (2) and a second adhesive seal (3), the second adhesive seal (3) being arranged closer to the discharge-side end (5) of the rotary shaft (1) than the first adhesive seal (2).

Description

Sealing device for a rotary shaft of a kneader
Technical Field
The field of the invention is a sealing device for a rotary shaft of a kneader.
Background
The kneader for mixing materials is provided with a rotating shaft, and in order to prevent the materials from leaking to the outside of the mixing chamber of the kneader, the kneader is additionally equipped with a sealing device.
List of citations
Patent literature
PTL 1：US5413475A
Patent document 1 discloses a screw which is inserted into a cylinder of an extruder, and a cooling hole is formed at a base of the screw, and a first adhesive seal sleeve having a multi-start square thread on an inner periphery is arranged between the base of the screw and the cylinder.
One constant goal of manufacturers using kneaders is to reduce the above-mentioned leakage.
Disclosure of Invention
Technical problem
During the course of the study, the inventors have found a specific sealing device (123) for the rotary shaft of a kneader, which can unexpectedly improve and reduce the leakage of the mixed materials.
Solution to the technical problem
The solution is to provide a sealing device (123) for a rotary shaft (1) of a kneader, said sealing device (123) being provided with a first adhesive seal (2) and a second adhesive seal (3).
Advantageous effects of the invention
The specific sealing device (123) for the rotary shaft of the kneader can unexpectedly improve and reduce the leakage of the mixed material.
Drawings
Fig. 1 shows a schematic cross-section of a part of a kneader according to the invention, in particular a sealing device (123);
fig. 2 shows a schematic cross-sectional view of a sealing device (123) according to the invention, in particular a first viscous seal rotating part (22);
fig. 3 shows a schematic cross-sectional view of a sealing device (123) according to the invention, in particular a second adhesive seal (3) provided with a second adhesive seal-securing portion (31) and a second adhesive seal-rotating portion (32);
fig. 4 shows a schematic cross-sectional view of a sealing device (123), in particular a second viscous seal rotating part (32), according to the invention;
Detailed Description
The following aspects, embodiments, examples, and variations including one or both of the preferred ranges, matters, and others may be applied to any of the other aspects, embodiments, other examples, and other variations of the present invention unless explicitly stated otherwise.
Any numerical interval represented by the expression "between a and b" represents a numerical range that is greater than "a" and less than "b" (i.e., excluding the limits a and b), while any numerical interval represented by the expression "a-b" means a numerical range from "a" to "b" (i.e., including the strict limits a and b).
Fig. 1, 2, 3 and 4 show a first aspect of the invention, which is a sealing device (123) for a rotary shaft (1) of a kneader; the rotating shaft (1) has a rotating shaft diameter (1D) and a rotating axis (1C); the sealing means (123) is provided with a first adhesive seal (2) and a second adhesive seal (3), the second adhesive seal (3) being arranged closer to the discharge-side end (5) of the rotary shaft (1) than the first adhesive seal (2); the first adhesive seal (2) is provided with a first adhesive seal fixing portion (21), a first adhesive seal rotating portion (22) rotating with the rotary shaft (1), and at least one first adhesive seal gap (2122C), the at least one first adhesive seal gap (2122C) being at least one distance from the first adhesive seal fixing portion (21) to the first adhesive seal rotating portion (22); the first viscous seal rotation portion (22) has at least one first viscous seal rotation portion spiral groove (221) and at least one first viscous seal rotation portion thread (222) formed on a radially outer circumferential surface of the first viscous seal rotation portion (22); the first viscous seal rotating portion spiral groove (221) extends spirally around the rotation axis (1C) of the rotation shaft (1); the first viscous seal rotating portion thread (222) is defined by a first viscous seal rotating portion helical groove (221); the second adhesive seal (3) is provided with a second adhesive seal fixing portion (31), at least one second adhesive seal rotating portion (32) rotating with the rotary shaft (1), and at least one second adhesive seal gap (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) which is at least one distance from the second adhesive seal fixing portion (31) to the second adhesive seal rotating portion (32); the second viscous seal rotation portion (32) has at least one second viscous seal rotation portion spiral groove (32241, 32251) and at least one second viscous seal rotation portion thread (32242, 32252) formed on a radially outermost circumferential surface of the second viscous seal rotation portion (32);
-the second viscous sealing rotating part helical groove (32241, 32251) extends helically around the rotation axis (1C) of the rotation shaft (1);
-the second viscous sealing rotating part thread (32242, 32252) is delimited by a second viscous sealing rotating part helical groove (32241, 32251);
according to a preferred embodiment of the present invention, wherein the kneader is an apparatus for kneading at least one of plastic, rubber or a combination thereof, or at least one of a chemical agent and plastic, rubber or a combination thereof, by a blade (1B) fixed to a rotation shaft of the kneader, preferably the chemical agent is at least one of a filler, a coupling agent, a plasticizer, an anti-aging agent, an antioxidant, a crosslinking agent or a combination thereof.
According to a preferred embodiment of the invention, the first adhesive sealing and fixing part (21) is fixed to the housing (7) of the kneader, the second adhesive sealing and fixing part (31) or both.
According to a preferred embodiment of the invention, wherein the second adhesive seal-fixing portion (31) is fixed to at least one of the housing (7) of the kneader, the first adhesive seal-fixing portion (21) or both.
According to a preferred embodiment of the invention, the first viscous sealing rotary part (22) is fixed to the rotary shaft (1), the second viscous sealing rotary part (32) or both.
According to a preferred embodiment of the invention, the second viscous sealing rotary part (32) is fixed to the rotary shaft (1), the first viscous sealing rotary part (22) or both.
"radial" means "in a radial direction", and the radial direction is a direction perpendicular to an axial direction, which is a direction parallel to a rotation axis (1C) of the rotation shaft (1).
According to a preferred embodiment of the invention, wherein the second viscous seal rotating portion protrusion is a radial protrusion in the second viscous seal rotating portion (32).
A second aspect of the invention is a sealing device (123) according to the first aspect, wherein the first viscous seal rotating portion (22) has a first viscous seal rotating portion diameter (22D) having a length that is twice the distance from the radially outermost portion of the first viscous seal rotating portion (22) to the rotational axis (1C) of the rotational shaft (1), and the second viscous seal rotating portion (32) has a second viscous seal rotating portion diameter (32D) having a length that is twice the distance from the radially outermost portion of the second viscous seal rotating portion (32) to the rotational axis (1C) of the rotational shaft (1), preferably the second viscous seal rotating portion diameter (32D) is larger than the first viscous seal rotating portion diameter (22D), more preferably the ratio of the second viscous seal rotating portion diameter (32D) to the first viscous seal rotating portion diameter (22D) is between 100.0% and 150.0%, still more preferably between 105.0% and 140.0%, in particular between 110.0% and 130.0%. In the present example shown in the drawings, this ratio is 118.5%. This may make the sealing properties of the second adhesive seal (3) more efficient.
According to a preferred embodiment of the second aspect, wherein the ratio of the first viscous seal rotating part diameter (22D) to the rotating shaft diameter (1D) is between 100.0% and 150.0%, preferably between 100.0% and 140.0%, more preferably between 105.0% and 135.0%, still more preferably between 110.0% and 130.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the first viscous seal rotation portion diameter (22D) to the rotation shaft diameter (1D) is 119.4%.
According to a preferred embodiment of the second aspect, wherein the ratio of the second viscous sealing rotating part diameter (32D) to the rotating shaft diameter (1D) is between 100% and 200.0%, preferably between 110.0% and 170.0%, more preferably between 120.0% and 160.0%, still more preferably between 130.0% and 150.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second viscous seal rotation portion diameter (32D) to the rotation shaft diameter (1D) is 142.0%.
A third aspect of the present invention is the sealing device (123) according to the first or second aspect, wherein the first viscous seal rotating portion (22) has a first viscous seal rotating portion width (22W) in a direction parallel to the rotation axis (1C) of the rotation shaft (1), the second viscous seal rotating portion (32) has a second viscous seal rotating portion width (3224W, 3225W) in a direction parallel to the rotation axis (1C) of the rotation shaft (1), preferably the second viscous seal rotating portion width (3224W, 3225W) is smaller than the first viscous seal rotating portion width (22W) (for preventing overheating), preferably a ratio of the second viscous seal rotating portion width (3224W, 3225W) to the first viscous seal rotating portion width (22W) is between 5.0% and 20.0%, more preferably between 10.0% and 15.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second adhesive seal rotating portion width (3224W, 3225W) to the first adhesive seal rotating portion width (22W) is 11.9%.
According to a preferred embodiment of the third aspect, wherein the ratio of the first viscous seal rotating portion width (22W) to the rotating shaft diameter (1D) is between 50.0% and 100.0%, preferably between 55.0% and 95.0%, more preferably between 60.0% and 90.0%, still more preferably between 65.0% and 85.0%, in particular between 70.0% and 75.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the first viscous seal rotation portion width (22W) to the rotation shaft diameter (1D) is 74.3%.
According to a preferred embodiment of the third aspect, wherein the ratio of the second viscous sealing rotation part width (3224W, 3225W) to the rotation shaft diameter (1D) is between 4.0% and 20.0%, preferably between 5.0% and 13.0%, more preferably between 6.0% and 12.0%, still more preferably between 7.0% and 11.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second adhesive seal rotating portion width (3224W, 3225W) to the rotating shaft diameter (1D) is 8.8%.
A fourth aspect of the invention is the sealing device (123) according to any one of the first to third aspects, wherein the first viscous seal rotating portion thread (222) has a first viscous seal rotating portion thread height (222H) in a direction perpendicular to the rotation axis (1C) of the rotation shaft (1), the second viscous seal rotating portion thread (32242, 32252) has a second viscous seal rotating portion thread height (32242H, 32252H) in a direction perpendicular to the rotation axis (1C) of the rotation shaft (1), preferably the second viscous seal rotating portion thread height (32242H, 32252H) is smaller than the first viscous seal rotating portion thread height (222H) (for preventing overheating), more preferably the ratio of the second viscous seal rotating portion thread height (32242H, 32252H) to the first viscous seal rotating portion thread height (222H) is between 60% and 100%, still more preferably between 65% and 95%, in particular between 70% and 90%, more particularly between 75% and 85%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second tack seal rotating portion thread height (32242H, 32252H) to the first tack seal rotating portion thread height (222H) is 80.0%.
According to a preferred embodiment of the fourth aspect, wherein the ratio of the first viscous seal rotating portion thread height (222H) to the rotating shaft diameter (1D) is between 1.0% and 10.0%, preferably between 1.0% and 8.0%, more preferably between 1.0% and 6.0%, still more preferably between 2.0% and 4.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the first viscous seal rotating portion thread height (222H) to the rotating shaft diameter (1D) is 3.3%.
According to a preferred embodiment of the fourth aspect, wherein the ratio of the second viscous seal rotating portion thread height (32242H, 32252H) to the rotation shaft diameter (1D) is between 1.0% and 10.0%, preferably between 1.0% and 7.0%, more preferably between 1.0% and 6.0%, still more preferably between 1.0% and 5.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second viscous seal rotation portion thread height (32242H, 32252H) to the rotation shaft diameter (1D) is 2.7%.
A fifth aspect of the present invention is the sealing device (123) according to any one of the first to fourth aspects, wherein the first viscous seal rotation portion thread (222) has a first viscous seal rotation portion thread angle (222A) from one side of the first viscous seal rotation portion thread (222) to the other side of the first viscous seal thread in a section parallel to and including the rotation axis (1C) of the rotation shaft (1), and the second viscous seal rotation portion thread (32242, 32252) has a second viscous seal rotation portion thread angle (32242A, 32252A) from one side of the second viscous seal rotation portion thread (32242, 32252) to the other side of the second viscous seal rotation portion thread (32242, 32252) in a section parallel to and including the rotation axis (1C) of the rotation shaft, preferably, the second viscous seal rotation portion thread angle (32242A, 32252A) is smaller than the first viscous seal rotation portion thread angle (222A) (for preventing overheating).
According to a preferred embodiment of the fifth aspect, wherein the first viscous seal rotating portion thread angle (222A) is between 5 and 50 degrees, preferably between 10 and 40 degrees, more preferably between 15 and 35 degrees, still more preferably between 20 and 30 degrees, in particular between 21 and 25 degrees. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the first viscous seal rotation portion thread angle (222A) is 24 degrees.
According to a preferred embodiment of the fifth aspect, wherein the second viscous seal rotating portion thread angle (32242 a, 32252 a) is between 0 and 40 degrees, preferably between 5 and 35 degrees, more preferably between 10 and 30 degrees, still more preferably between 15 and 25 degrees, in particular between 16 and 24 degrees. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the second viscous seal rotation portion thread angle (32242A, 33252A) is 21 degrees.
A sixth aspect of the present invention is the sealing device (123) according to any one of the first to fifth aspects, wherein the first viscous seal rotating portion thread (222) HAs a first viscous seal rotating portion thread helix angle (222 HA) from a direction parallel to the rotation axis (1C) of the rotation shaft (1) to a direction in which the first viscous seal rotating portion thread (222) extends, and the second viscous seal rotating portion thread (32242, 32252) HAs a second viscous seal rotating portion thread helix angle (32242 HA, 32252 HA) from a direction parallel to the rotation axis (1C) of the rotation shaft (1) to a direction in which the second viscous seal rotating portion thread (32242, 32252) extends, preferably the second viscous seal rotating portion thread helix angle (32242 HA, 32252 HA) is smaller than the first viscous seal rotating portion thread helix angle (222 HA) (for preventing overheating).
According to a preferred embodiment of the sixth aspect, wherein the first viscous seal rotating portion thread helix angle (222 HA) is between 50 and 90 degrees, preferably between 55 and 85 degrees, more preferably between 60 and 80 degrees, still more preferably between 65 and 75 degrees. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the first viscous seal rotating portion thread helix angle (222 HA) is 70 degrees.
According to a preferred embodiment of the sixth aspect, wherein the second viscous sealing rotating portion thread helix angle (32242 HA, 32252 HA) is between 30 and 70 degrees, preferably between 35 and 65 degrees, more preferably between 40 and 60 degrees, still more preferably between 45 and 55 degrees. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the second viscous seal rotating portion thread helix angle (32242 HA, 32252 HA) is 51 degrees.
A seventh aspect of the present invention is the sealing device (123) according to any one of the first to sixth aspects, wherein the first viscous seal rotating portion thread (222) has a spiral development (222 DH) of the first viscous seal rotating portion thread, the second viscous seal rotating portion thread (32242, 32252) has a spiral development (32242 DH, 32252 DH) of the second viscous seal rotating portion thread, preferably the spiral development (32242 DH, 32252 DH) of the second viscous seal rotating portion thread is smaller than the spiral development (222 DH) of the first viscous seal rotating portion thread (for preventing overheating), more preferably the ratio of the spiral development (32242 DH, 32252 DH) of the second viscous seal rotating portion thread to the spiral development (222 DH) of the first viscous seal rotating portion thread is between 80.0% and 100.0%, still more preferably between 85.0% and 95.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the spiral development of the second viscous seal rotation portion thread (32242 DH, 32252 DH) to the spiral development of the first viscous seal rotation portion thread (222 DH) was 88.9%.
The spiral development (222 DH) of the first viscous seal rotating portion thread is the spiral distance of the first viscous seal rotating portion thread (222) during one full revolution (360 degrees) of the rotating shaft (1), the spiral development (222 DH) of the first viscous seal rotating portion thread having the following relationship: 222 dh=22 d×pi/Sin (222 HA).
The spiral expansion (32242 DH, 32252 DH) of the second adhesive seal rotating portion thread is a spiral distance of the second adhesive seal rotating portion thread (32242, 32252) during one full rotation (360 degrees) of the rotary shaft (1), and in the case where the radially outermost portion of the second adhesive seal rotating portion (32) of the present example as shown in the drawings is the radially outermost portion of the second adhesive seal rotating portion (32242, 32252), the spiral expansion (32242 DH, 32252 DH) of the second adhesive seal rotating portion thread has the following relationship: 32242 DH=32Dxpi/Sin (32242 HA), 32252 DH=32Dxpi/Sin (32242 HA).
According to a preferred embodiment of the seventh aspect, wherein the ratio of the spiral development (222 DH) of the thread of the first viscous sealing rotating part to the diameter of the rotating shaft (1D) is between 300.0% and 500.0%, preferably between 330.0% and 470.0%, preferably between 360.0% and 440.0%, more preferably between 390.0% and 410.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the spiral development (222 DH) of the first viscous seal rotating portion thread to the rotating shaft diameter (1D) is 398.1%.
According to a preferred embodiment of the seventh aspect, wherein the ratio of the spiral development (32242 DH, 32252 DH) of the second viscous sealing rotating part thread to the rotation shaft diameter (1D) is between 250.0% and 450.0%, preferably between 280.0% and 420.0%, more preferably between 310.0% and 390.0%, still more preferably between 340.0% and 360.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the spiral expansion (32242 DH, 32252 DH) of the second adhesive seal rotating portion thread to the rotation shaft diameter (1D) is 354.0%.
An eighth aspect of the invention is the sealing device (123) according to any one of the first to seventh aspects, wherein the first viscous seal rotating portion thread (222) has a first viscous seal rotating portion thread lead (222L) in a direction parallel to the rotational axis (1C) of the rotational shaft (1), the second viscous seal rotating portion thread (32242, 32252) has a second viscous seal rotating portion thread lead (32242L, 32252L) in a direction perpendicular to the rotational axis (1C) of the rotational shaft (1), preferably the second viscous seal rotating portion thread lead (32242L, 32252L) is larger than the first viscous seal rotating portion thread lead (222L) (for preventing overheating), more preferably the ratio of the second viscous seal rotating portion thread lead (32242L, 32252L) to the first viscous seal rotating portion thread lead (222L) is between 100.0% and 300.0%, still more preferably between 130.0% and 270.0%, in particular between 160.0% and 240.0%, more particularly between 210.0% and 190.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second viscous seal rotating portion thread lead (32242L, 32252L) to the first viscous seal rotating portion thread lead (222L) is 202.9%.
The first viscous seal rotation part thread lead (222L) is a spiral advance of the first viscous seal rotation part thread (222) in a direction parallel to a rotation axis (1C) of the rotation shaft (1) during one full rotation (360 degrees) of the rotation shaft (1), the first viscous seal rotation part thread lead (222L) having the following relationship: 222 l=22dχpi/Tan (222 HA).
The second viscous seal rotation portion thread lead (32242L, 32252L) is a spiral advance of the second viscous seal rotation portion thread (32242, 32252) in a direction parallel to the rotation axis (1C) of the rotation shaft (1) during one full rotation (360 degrees) of the rotation shaft (1), and in the case where the radially outermost portion of the second viscous seal rotation portion (32) of the present example as shown in the drawings is the radially outermost portion of the second viscous seal rotation portion (32242, 32252), the second viscous seal rotation portion thread lead (32242L, 32252L) has the following relationship: 32242 L=32Dxpi/Tan (32242 HA), 32252 L=32Dxpi/Tan (32252 HA).
According to a preferred embodiment of the eighth aspect, wherein the ratio of the first viscous seal rotating portion thread lead (222L) to the rotation shaft diameter (1D) is between 100.0% and 160.0%, preferably between 105.0% and 155.0%, more preferably between 110.0% and 150.0%, still more preferably between 115.0% and 145.0%, in particular between 120.0% and 140.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the first viscous seal rotating portion thread lead (222L) to the rotating shaft diameter (1D) is 132.7%.
According to a preferred embodiment of the eighth aspect, wherein the ratio of the second viscous seal rotating portion thread lead (32242L, 32252L) to the rotation shaft diameter (1D) is between 200.0% and 340.0%, preferably between 220.0% and 320.0%, more preferably between 240.0% and 300.0%, still more preferably between 260.0% and 280.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second viscous seal rotating portion thread lead (32242L, 32252L) to the rotating shaft diameter (1D) is 269.4%.
A ninth aspect of the present invention is the sealing device (123) according to any one of the first to eighth aspects, wherein the number of second viscous seal rotating portion threads (32242, 32252) of the second viscous seal rotating portion (32) on a cross section perpendicular to the rotation axis (1C) of the rotary shaft (1) is larger than the number of first viscous seal rotating portion threads (222) of the first viscous seal rotating portion (22) on a cross section perpendicular to the rotation axis (1C). (for effective sealing)
The number of first viscous seal rotation portion threads (222) of the first viscous seal rotation portion (22) in a cross section perpendicular to the rotation axis (1C) is the same as the number of threads (or the number of lines) of the first viscous seal rotation portion (22).
The number of second viscous seal rotation portion threads (32242, 32252) of the second viscous seal rotation portion (32) in a cross section perpendicular to the rotation axis (1C) of the rotation shaft (1) is the same as the number of screw flights (or the number of threads) of the second viscous seal rotation portion (32242, 32252).
According to a preferred embodiment of the ninth aspect, wherein the number of first viscous seal rotating portion threads (222) of the first viscous seal rotating portion (22) on a cross section perpendicular to the rotation axis (1C) of the rotation shaft (1) is between 5 and 30, preferably between 6 and 28, more preferably between 7 and 26, still more preferably between 8 and 24, in particular between 9 and 22, more particularly between 10 and 20, still more particularly between 12 and 18. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the number of first viscous seal rotating portion threads (222) is 16.
According to a preferred embodiment of the ninth aspect, wherein the number of second viscous seal rotating portion threads (32242, 32252) of the second viscous seal rotating portion (32) on a cross section perpendicular to the rotation axis (1C) of the rotation shaft (1) is between 30 and 90, preferably between 35 and 85, more preferably between 40 and 80, still more preferably between 45 and 75, in particular between 50 and 70. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the number of second tack seal rotating portion threads (32242, 32252) is 60.
A tenth aspect of the invention is a sealing device (123) according to any of the first to ninth aspects, wherein the first viscous seal rotating part thread (222) has a first viscous seal rotating part thread pitch (222P) in a direction parallel to the rotational axis (1C) of the rotational shaft (1), the second viscous seal rotating part thread (32242, 32252) has a second viscous seal rotating part thread pitch (32242P, 32252P) in a direction perpendicular to the rotational axis (1C) of the rotational shaft (1), preferably the second viscous seal rotating part thread pitch (32242P, 32252P) is larger than the first viscous seal rotating part thread pitch (222P) (for effective sealing), preferably the ratio of the second viscous seal rotating part thread pitch (32242P, 32252P) to the first viscous seal rotating part thread pitch (222P) is between 10.0% and 100.0%, more preferably between 20.0% and 90.0%, still more preferably between 30.0% and 80.0%, in particular between 40.0% and 70.0%, more particularly between 60.0% and 60.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second viscous seal rotation portion thread pitch (32242P, 32252P) to the first viscous seal rotation portion thread pitch (222P) is 54.1%.
The first viscous-seal rotation portion screw pitch (222P) is a distance from an apex of the first viscous-seal rotation portion screw (222) to a next apex in a direction parallel to a rotation axis (1C) of the rotation shaft (1), the first viscous-seal rotation portion screw pitch (222P) having the following relationship: 222 p=22dχpi/Tan (222 HA)/(the number of flights (or lines) of the first adhesive seal rotating portion (22)).
The second viscous seal rotation portion screw pitch (32242P, 32252P) is a distance from an apex of the second viscous seal rotation portion screw thread (32242, 32252) to a next apex in a direction parallel to the rotation axis (1C) of the rotation shaft (1), and in a case where a radially outermost portion of the second viscous seal rotation portion (32) of the present example as shown in the drawings is a radially outermost portion of the second viscous seal rotation portion (32242, 32252), the second viscous seal rotation portion screw pitch (32242P, 32252P) has the following relationship: 32242 p=32dχpi/Tan (32242 HA)/(number of lands (or lines) of the second adhesive seal rotating portion (32242)), 32252 p=32dχpi/Tan (32252 HA)/(number of lands (or lines) of the second adhesive seal rotating portion (32252).
According to a preferred embodiment of the tenth aspect, wherein the ratio of the thread pitch (222P) of the first viscous seal rotating part to the diameter (1D) of the rotating shaft is between 2.0% and 15.0%, preferably between 3.0% and 14.0%, more preferably between 4.0% and 13.0%, still more preferably between 5.0% and 12.0%, in particular between 6.0% and 11.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the thread pitch of the first viscous seal rotating portion to the diameter (1D) of the rotating shaft is 8.3%.
According to a preferred embodiment of the tenth aspect, wherein the ratio of the second viscous seal rotating portion thread pitch (32242P, 32252P) to the rotating shaft diameter (1D) is between 1.0% and 8.0%, preferably between 2.0% and 7.0%, more preferably between 3.0% and 8.0%, still more preferably between 4.0% and 5.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second viscous seal rotation portion thread pitch (32242P, 32252P) to the rotation shaft diameter (1D) is 4.5%.
An eleventh aspect of the present invention is the sealing device (123) according to any one of the first to tenth aspects, wherein the second viscous seal rotating portion (32) has a circumferential surface coated by nitriding, and the vickers hardness of the circumferential surface of the second viscous seal rotating portion (32) is preferably between 600 and 1200HV, more preferably between 700 and 1100HV, still more preferably between 800 and 1000 HV. This can maintain improved leakage performance for a long period of time. In the present example shown in the drawings, the circumferential surface of the second viscous seal rotating portion (32) is coated with nitriding, and the vickers hardness is 900HV (according to ISO 6507-1:2005 and ISO 6507-4:2005).
A twelfth aspect of the invention is a sealing device (123) according to any of the first to eleventh aspects, wherein the ratio of the first viscous sealing gap (2122C) to the rotation shaft diameter (1D) is between 0.1% and 10.0%, preferably between 0.2% and 8.0%, more preferably between 0.3% and 7.0%, still more preferably between 0.4% and 6.0%, in particular between 0.5% and 5.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the first viscous seal gap (2122C) to the rotation shaft diameter (1D) is 0.9 to 4.2%.
According to a preferred embodiment of the present invention, wherein the second adhesive seal (3) is provided with a plurality of second adhesive seal gaps (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) which are distances from the second adhesive seal fixing portion (31) to the second adhesive seal rotating portion (32).
A thirteenth aspect of the invention is a sealing device (123) according to any of the first to twelfth aspects, wherein the ratio of the second viscous sealing gap (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) to the rotation shaft diameter (1D) is between 0.1% and 15.0%, preferably between 0.2% and 13.0%, more preferably between 0.4% and 11.0%, still more preferably between 0.6% and 10.0%. This is to compromise between effective sealing and protection against overheating. In the present example shown in the drawings, the ratio of the second viscous seal gap (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) to the rotation shaft diameter (1D) is 0.9% to 9.7%.
A fourteenth aspect of the present invention is the sealing device (123) according to any one of the first to thirteenth aspects, wherein the second adhesive seal-fixing portion (31) includes at least one second adhesive seal-fixing portion concave portion (311, 3114, 3115) and at least one second adhesive seal-fixing portion convex portion (312, 3124, 31245, 3125) in a direction perpendicular to the rotation axis (1C) of the rotation shaft (1); the second viscous seal rotation portion (32) includes at least one viscous seal rotation portion concave portion (3214, 32145, 3215) and at least one viscous seal rotation portion convex portion (322, 3224, 3225) in a direction toward the viscous seal fixation portion (31).
According to a preferred embodiment of the fourteenth aspect, wherein the second adhesive sealing and fixing part (31) comprises a plurality of second adhesive sealing and fixing part recesses (311, 3114, 3115) and a plurality of second adhesive sealing and fixing part protrusions (312, 3124, 31245, 3125) in a direction towards the second adhesive sealing and fixing part (32), preferably the second adhesive sealing and fixing part protrusions (312, 3124, 31245, 3125) have a distance (32143215D) from one to the next of the second adhesive sealing and fixing part protrusions (312, 3124, 31245, 3125) in a direction parallel to the rotation axis (1C) of the rotation shaft (1), and the ratio of the distance (32143215D) to the rotation shaft diameter (1D) is between 0.0% and 20.0%, preferably between 1.0% and 19.0%, more preferably between 2.0% and 18.0%, still more preferably between 3.0% and 17.0%, in particular between 4.0 and 16.0%, more preferably between 15.0% and 15.0%. In the present example shown in the drawings, the ratio of the distance (32143215D) to the rotation shaft diameter (1D) is 10.0%.
According to a preferred embodiment of the fourteenth aspect, wherein the second viscous seal rotating portion (32) includes a plurality of second viscous seal rotating portion concave portions (321, 3214, 32145, 3215) and a plurality of second viscous seal rotating portion convex portions in a direction toward the second viscous seal fixing portion (31), and the second viscous seal rotating portion convex portions are formed of a plurality of second viscous seal rotating portions (322, 3224, 3225).
According to a preferred embodiment of the fourteenth aspect, wherein the second adhesive seal (3) is provided with a second adhesive seal fixing portion (31), a second adhesive seal rotating portion (32) rotating with the rotary shaft (1), and a plurality of second adhesive seal gaps (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) which are distances from the second adhesive seal fixing portion (31) to the second adhesive seal rotating portion (32); the second adhesive seal fixing portion (31) includes a plurality of second adhesive seal fixing portion concave portions (311, 3114, 3115) and a plurality of second adhesive seal fixing portion convex portions (312, 3124, 31245, 3125) in a direction toward the second adhesive seal rotating portion (32); the second adhesive seal fixing portion concave portion (311, 3114, 3115) includes: a 1 st second adhesive seal-fixing portion recess (3114) that is distant from the discharge-side end (5), i.e., that is located at the other side end (4) opposite to the discharge-side end (5); and a 2 nd second adhesive seal-fixing portion recess (3115) near the discharge-side end (5); the second adhesive seal fixing portion convex portion (312, 3124, 31245, 3125) includes: a 1 st second adhesive seal-fixing portion convex portion (3124) which is distant from the discharge-side end (5); a 2 nd second adhesive seal-fixing portion convex portion (31245) located at the lower side; and a 3 rd second adhesive seal fixing portion convex portion (3125) near the discharge-side end (5); the second viscous seal rotation portion (32) includes a plurality of second viscous seal rotation portion concave portions (321, 3214, 32145, 3215) and a plurality of second viscous seal rotation portion convex portions (322, 3224, 3225) formed of the plurality of second viscous seal rotation portions in a direction toward the second viscous seal fixation portion (31); the second adhesive seal rotating portion recess (321, 3214, 32145, 3215) comprises a second adhesive seal (3): a 1 st second viscous seal rotating portion recess (3214) which is distant from the discharge-side end (5) of the rotating shaft (1); a 2 nd second adhesive seal rotating portion recess (32145) located on a lower side; and a 3 rd second viscous seal rotating portion recess (3215) near the discharge-side end (5) of the rotating shaft (1); the second adhesive seal rotating portion protrusion (322, 3224, 3225) includes a second adhesive seal (3): a 1 st second viscous seal rotating portion projection (3224) formed by a 1 st second viscous seal rotating portion, which is distant from the discharge-side end (5); and a 2 nd second viscous seal rotating portion protrusion (3225) formed of a 2 nd second viscous seal rotating portion, which is close to the discharge-side end (5); the second adhesive sealing gap (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) comprises: a 1 st second adhesive seal gap (31243214C) from the 1 st second adhesive seal fixing portion convex portion (3124) to the 1 st second adhesive seal rotating portion concave portion (3214); a 2 nd second adhesive seal gap (31243224C) from the 1 st second adhesive seal-fixing portion projection (3124) to the 1 st second adhesive seal-rotating portion projection (3224); a 3 rd second adhesive seal gap (31143224C) from the 1 st second adhesive seal-fixing portion recess (3114) to the 1 st second adhesive seal-rotating portion projection (3224); a 4 th second adhesive seal gap (312453224C) from the 1 st second adhesive seal fixing portion projection (3124) to the 1 st second adhesive seal rotating portion projection (3224); a 5 th second adhesive seal gap (3124532145C) from the 1 st second adhesive seal fixing portion convex portion (3124) to the 2 nd second adhesive seal rotating portion concave portion (32145); a 6 th second adhesive seal gap (312453225C) from the 1 st second adhesive seal fixing portion projection (3124) to the 2 nd second adhesive seal rotating portion projection (3225); a 7 th second adhesive seal gap (31153225C) from the 2 nd second adhesive seal-fixing portion recess (3115) to the 2 nd second adhesive seal-rotating portion projection (3225); an 8 th second adhesive seal gap (31253225C) from the 3 rd second adhesive seal fixing portion projection (3125) to the 2 nd second adhesive seal rotating portion projection (3225); and a 9 th second adhesive seal gap (31253215C) from the 3 rd second adhesive seal fixing portion convex portion (3125) to the 3 rd second adhesive seal rotating portion concave portion (3215).
A fifteenth aspect of the present invention is a sealing device (123) according to any one of the first to fourteenth aspects, wherein the second adhesive seal (3) comprises at least one cooling jacket (33), preferably the cooling jacket (33) is arranged in the second adhesive seal-fixing portion (31), more preferably the cooling jacket (33) is provided with at least one cooling line (34), still more preferably the cooling line (34) is connected with a cooling device for circulating a cooling medium through the cooling line (34), in particular the cooling medium is water.
According to a preferred embodiment of the present invention, the kneader is provided with a rotary shaft (1) and a sealing device (123) according to any one of the first to fifteenth aspects.
The invention is further illustrated by the following non-limiting examples.
Example
In order to confirm the effect of the present invention, the leakage performance of the two sealing devices for the rotary shafts of the kneaders, i.e., the leakage amount of the rubber composition measured per day for each sealing device, as examples and reference examples according to the present invention, was compared.
An example of the present invention is a sealing device (123) for a rotary shaft of a kneader, the sealing device (123) being provided with a first tack seal (2) and a second tack seal (3) shown in the drawings, and a reference example is another sealing device for a rotary shaft of a kneader, which has the same rotary shaft diameter and rotary axis as those of the example of the present invention, the sealing device not being provided with any second tack seal, but being provided with the same first tack seal as the example of the present invention except that the first tack seal rotary part diameter (22D of 99% with respect to the example of the present invention), the first tack seal rotary part width (22W of 95% with respect to the example of the present invention), the first tack seal rotary part screw height (80% with respect to 222H of the example of the present invention), the first tack seal screw angle (25 degrees), the screw expansion of the first tack seal rotary part screw thread (222 DH of 96% with respect to the example of the present invention), the first tack seal rotary part screw lead (222L of 50% of the first tack seal rotary part screw thread, the number of screw threads (number of screw threads or screw threads) (number of screw threads); 10), first viscous seal rotational part thread pitch (80% relative to 222P of the example of the invention), first viscous seal gap (1D of 1 to 4% relative to the example of the invention).
The results (leakage performance) are expressed in terms of radix 100, that is, a value of 100 is given to the leakage amount (Kg) per 1 day of the reference machine, and the relative value of the leakage amount (Kg) per 1 day of the example machine having the sealing device (123) is 26. The lower the value, the better the leakage performance.
The sealing device (123) for a rotary shaft of a kneader according to the present invention can unexpectedly improve and reduce leakage of mixed materials.

Claims (15)

1. A sealing device (123) for a rotary shaft (1) of a kneader; the rotating shaft (1) has a rotating shaft diameter (1D) and a rotating axis (1C);
-the sealing means (123) are provided with a first adhesive seal (2) and a second adhesive seal (3), the second adhesive seal (3) being arranged closer to the discharge-side end (5) of the rotary shaft (1) than the first adhesive seal (2);
-the first adhesive seal (2) is provided with a first adhesive seal fixation portion (21), a first adhesive seal rotation portion (22) rotating with the rotation shaft (1), and at least one first adhesive seal gap (2122C), the at least one first adhesive seal gap (2122C) being at least one distance from the first adhesive seal fixation portion (21) to the first adhesive seal rotation portion (22);
-the first viscous seal rotating portion (22) has at least one first viscous seal rotating portion spiral groove (221) and at least one first viscous seal rotating portion thread (222) formed on a radially outer circumferential surface of the first viscous seal rotating portion (22);
-said first viscous sealing rotating part helical groove (221) extends helically around the rotation axis (1C) of the rotation shaft (1);
-the first viscous seal rotating portion thread (222) is delimited by a first viscous seal rotating portion helical groove (221);
-the second adhesive seal (3) is provided with a second adhesive seal fixation part (31), at least one second adhesive seal rotation part (32) rotating with the rotation shaft (1), and at least one second adhesive seal gap (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) at least one distance from the second adhesive seal fixation part (31) to the second adhesive seal rotation part (32);
-the second viscous sealing rotation portion (32) has at least one second viscous sealing rotation portion spiral groove (32241, 32251) and at least one second viscous sealing rotation portion thread (32242, 32252) formed on a radially outermost circumferential surface of the second viscous sealing rotation portion (32);
-the second viscous sealing rotating part helical groove (32241, 32251) extends helically around the rotation axis (1C) of the rotation shaft (1);
-the second tack seal rotating portion threads (32242, 32252) are defined by second tack seal rotating portion helical grooves (32241, 32251).
2. The sealing device (123) according to claim 1, wherein the first viscous seal rotating portion (22) has a first viscous seal rotating portion diameter (22D), a length of the first viscous seal rotating portion diameter (22D) is twice a distance from a radially outermost portion of the first viscous seal rotating portion (22) to a rotational axis (1C) of the rotational shaft (1), the second viscous seal rotating portion (32) has a second viscous seal rotating portion diameter (32D), a length of the second viscous seal rotating portion diameter (32D) is twice a distance from a radially outermost portion of the second viscous seal rotating portion (32) to the rotational axis (1C) of the rotational shaft (1), and the second viscous seal rotating portion diameter (32D) is larger than the first viscous seal rotating portion diameter (22D).
3. A sealing device (123) according to claim 2 or claim 3, wherein the first viscous seal rotation portion (22) has a first viscous seal rotation portion width (22W) in a direction parallel to the rotation axis (1C) of the rotation shaft (1), the second viscous seal rotation portion (32) has a second viscous seal rotation portion width (3224W, 3225W) in a direction parallel to the rotation axis (1C) of the rotation shaft (1), and the second viscous seal rotation portion width (3224W, 3225W) is smaller than the first viscous seal rotation portion width (22W), preferably the ratio of the second viscous seal rotation portion width (3224W, 3225W) to the first viscous seal rotation portion width (22W) is between 5.0% and 20.0%, more preferably between 10.0% and 15.0%.
4. A sealing device (123) according to any of claims 1-3, wherein the first viscous seal rotating part thread (222) has a first viscous seal rotating part thread height (222H) in a direction perpendicular to the rotation axis (1C) of the rotation shaft (1), the second viscous seal rotating part thread (32242, 32252) has a second viscous seal rotating part thread height (32242H, 32252H) in a direction perpendicular to the rotation axis (1C) of the rotation shaft (1), and the second viscous seal rotating part thread height (32242H, 32252H) is smaller than the first viscous seal rotating part thread height (222H), preferably the ratio of the second viscous seal rotating part thread height (32242H, 32252H) to the first viscous seal rotating part thread height (222H) is between 60% and 100%, more preferably between 65% and 95%, still more preferably between 70% and 90%, in particular between 75% and 85%.
5. The sealing device (123) of any of claims 1 to 4, wherein the first tack seal rotating portion thread (222) has a first tack seal rotating portion thread angle (222A) from one side of the first tack seal rotating portion thread (222) to the other side of the first tack seal thread in a cross section parallel to and including a rotational axis (1C) of the rotational shaft (1), and the second tack seal rotating portion thread (32242, 32252) has a second tack seal rotating portion thread angle (32242A, 32252A) from one side of the second tack seal rotating portion thread (32242, 32252) to the other side of the second tack seal rotating portion thread (32242, 32252) in a cross section parallel to and including the rotational axis (1C) of the rotational shaft (1), and the second tack seal rotating portion thread angle (32242A, 32252A) is less than the first tack seal rotating portion thread angle (222A).
6. The sealing device (123) of any of claims 1-5, wherein the first tack seal rotating portion thread (222) HAs a first tack seal rotating portion thread helix angle (222 HA) from a direction parallel to the rotational axis (1C) of the rotational shaft (1) to a direction in which the first tack seal rotating portion thread (222) extends, the second tack seal rotating portion thread (32242, 32252) HAs a second tack seal rotating portion thread helix angle (32242 HA, 32252 HA) from a direction parallel to the rotational axis (1C) of the rotational shaft (1) to a direction in which the second tack seal rotating portion thread (32242, 32252) extends, and the second tack seal rotating portion thread helix angle (32242 HA, 32252 HA) is less than the first tack seal rotating portion thread helix angle (222 HA).
7. The sealing device (123) of any of claims 1-6, wherein the first tack seal rotating portion thread (222) has a spiral development (222 DH) of the first tack seal rotating portion thread, the second tack seal rotating portion thread (32242, 32252) has a spiral development (32242 DH, 32252 DH) of the second tack seal rotating portion thread, and the spiral development (32242 DH, 32252 DH) of the second tack seal rotating portion thread is less than the spiral development (222 DH) of the first tack seal rotating portion thread.
8. The sealing device (123) of any of claims 1 to 7, wherein the first tack seal rotating portion thread (222) has a first tack seal rotating portion thread lead (222L) in a direction parallel to the rotational axis (1C) of the rotational shaft (1), the second tack seal rotating portion thread (32242, 32252) has a second tack seal rotating portion thread lead (32242L, 32252L) in a direction perpendicular to the rotational axis (1C) of the rotational shaft (1), and the second tack seal rotating portion thread lead (32242L, 32252L) is greater than the first tack seal rotating portion thread lead (222L).
9. The sealing device (123) according to any one of claims 1 to 8, wherein the number of second viscous seal rotating portion threads (32242, 32252) of the second viscous seal rotating portion (32) on a cross section perpendicular to the rotation axis (1C) of the rotary shaft (1) is greater than the number of first viscous seal rotating portion threads (222) of the first viscous seal rotating portion (22) on a cross section perpendicular to the rotation axis (1C).
10. The sealing device (123) according to any one of claims 1 to 9, wherein the first viscous seal rotating portion thread (222) has a first viscous seal rotating portion thread pitch (222P) in a direction parallel to the rotational axis (1C) of the rotational shaft (1), the second viscous seal rotating portion thread (32242, 32252) has a second viscous seal rotating portion thread pitch (32242P, 32252P) in a direction perpendicular to the rotational axis (1C) of the rotational shaft (1), and the second viscous seal rotating portion thread pitch (32242P, 32252P) is greater than the first viscous seal rotating portion thread pitch (222P).
11. The sealing device (123) according to any one of claims 1 to 10, wherein the second viscous sealing rotating portion (32) has a circumferential surface coated with nitriding.
12. The sealing device (123) of any of claims 1-11, wherein a ratio of the first viscous sealing gap (2122C) to a rotating shaft diameter (1D) is between 0.1% and 10.0%.
13. The sealing device (123) according to any of claims 1 to 12, wherein the ratio of the second viscous sealing gap (3132C, 31243214C, 31243224C, 31143224C, 312453224C, 3124532145C, 312453225C, 31153225C, 31253225C, 31253215C) to the rotation shaft diameter (1D) is between 0.1% and 15.0%, preferably between 0.2% and 13.0%, more preferably between 0.4% and 11.0%, still more preferably between 0.6% and 10.0%.
14. The sealing device (123) according to any one of claims 1 to 13, wherein the second adhesive sealing fixation portion (31) comprises at least one second adhesive sealing fixation portion recess (311, 3114, 3115) and at least one second adhesive sealing fixation portion protrusion (312, 3124, 31245, 3125) in a direction perpendicular to the rotation axis (1C) of the rotation shaft (1); the second viscous seal rotation portion (32) includes at least one viscous seal rotation portion concave portion (3214, 32145, 3215) and at least one viscous seal rotation portion convex portion (322, 3224, 3225) in a direction toward the viscous seal fixation portion (31).
15. The sealing device (123) according to any one of claims 1 to 14, wherein the second adhesive seal (3) comprises at least one cooling jacket (33), preferably the cooling jacket (33) is arranged in the second adhesive seal-fixing portion (31), more preferably the cooling jacket (33) is provided with at least one cooling line (34), still more preferably the cooling line (34) is connected with a cooling device for circulating a cooling medium through the cooling line (34), in particular the cooling medium is water.
CN202180099889.1A 2021-06-29 2021-06-29 Sealing device for a rotary shaft of a kneader Pending CN117561157A (en)

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PCT/JP2021/024462 WO2023275965A1 (en) 2021-06-29 2021-06-29 A sealing device for a rotor shaft of a kneader

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3155367B2 (en) * 1992-09-04 2001-04-09 株式会社神戸製鋼所 Kneading machine rotor shaft sealing device
JP3444990B2 (en) * 1994-11-02 2003-09-08 株式会社神戸製鋼所 Kneading machine rotor shaft sealing device
JP3550490B2 (en) * 1997-12-09 2004-08-04 株式会社神戸製鋼所 Rotor shaft seal structure of kneading machine
JPH11285200A (en) * 1998-03-30 1999-10-15 Matsushita Electric Ind Co Ltd Fluid bearing spindle motor
JP4009547B2 (en) * 2003-03-26 2007-11-14 株式会社神戸製鋼所 Shaft seal device
JP5167201B2 (en) * 2009-06-22 2013-03-21 株式会社神戸製鋼所 Screw compressor
JP2014185627A (en) * 2013-03-25 2014-10-02 Sekisui Plastics Tenri Co Ltd Resin delivery pump
JP2017020412A (en) * 2015-07-10 2017-01-26 株式会社荏原製作所 Fluid machine and shaft seal device

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