Driving end supporting piece for melt mixing system

Abstract

A driving end supporting piece for a melting and mixing system comprises two supporting bodies used for a conveying screw to penetrate through, the end of the conveying screw is supported through two bearing assemblies, two sets of tapered roller bearings can share radial stress, a thrust bearing can bear axial force, and the two sets of tapered roller bearings can bear axial force. The axial installation position and stable rotation of the conveying screw are guaranteed through the multiple axial springs, oil seal frameworks are installed at the ends, away from the blocking barrel, of shaft sleeves of the first bearing assembly and the second bearing assembly correspondingly, lubricating oil leakage can be avoided, a nitrogen cavity is further formed in the first supporting body, material oxidation can be prevented through nitrogen, and the service life of the conveying screw is prolonged. An oil seal framework is also installed on the shaft sleeve at the position, penetrating out of the nitrogen cavity, of the conveying screw, a spiral sealing piece is arranged at the end, extending out of the nitrogen cavity, of the shaft sleeve, and a spiral groove opposite to the conveying screw in rotating direction is formed in the outer wall of the spiral sealing piece, so that materials can be limited to flow between the spiral groove and the inner wall of the limiting ring; and materials are prevented from leaking from a gap between the conveying screw rod and the supporting piece.

Description

Technical Field

[0001] The utility model relates to the field of melt mixing systems, in particular to a driving end support member used in melt mixing systems. Background Art

[0002] The mixing, extrusion, and granulation unit can mix, plasticize, extrude, pelletize, separate, and dry materials, ultimately processing them into regular granular products. The melt mixing system is a key component of the mixing, extrusion, and granulation unit, primarily consisting of a barrel and support components. A conveying screw is inserted into the barrel's mixing chamber, and the end of the conveying screw is mounted within the support components. The material is heated within the mixing chamber and melted and plasticized by the conveying screw. The drive-end support component, used to support the end of the conveying screw connected to the motor reducer, must withstand both axial and radial forces and ensure a tight seal to prevent material leakage. Utility Model Content

[0003] The utility model aims to provide a driving end support member for a melt mixing system, which ensures stable support for a conveying screw and prevents material leakage.

[0004] The technical solution adopted by the utility model to solve the above technical problems is: a driving end support member for a melt mixing system, comprising two support bodies, wherein the first support body comprises a first support and a first end cover, the second support body comprises a second support and a second end cover, the interiors of the first support body and the second support body are respectively provided with through holes for penetrating a conveying screw, a retaining cylinder is provided between the first support body and the second support body, the inner hole of the retaining cylinder is communicated with the through holes of the first support body and the second support body, a vent cap is installed on the side wall of the retaining cylinder, a nitrogen chamber is further provided in the first support body, a first bearing assembly is provided in the through hole located on a side of the nitrogen chamber close to the second support body, a second bearing assembly is provided in the through hole of the second support body, and a sealing assembly is further provided on the first support body located on a side of the nitrogen chamber away from the second support body;

[0005] The first bearing assembly includes a pair of tapered roller bearings and a thrust bearing, the thrust bearing is located between the tapered roller bearing and the retaining cylinder, and a plurality of axial springs are provided between the end face of the thrust bearing and the end of the retaining cylinder. The second bearing assembly includes a pair of tapered roller bearings, the tapered roller bearings and the thrust bearing are mounted on the conveying screw via a bushing, a lubricating oil hole is respectively provided on the first end cover and the second end cover, and an oil seal skeleton is respectively installed on the end of the bushing of the first bearing assembly and the second bearing assembly away from the retaining cylinder;

[0006] The sealing assembly includes a shaft sleeve and a spiral seal. An oil seal skeleton is installed on the end of the shaft sleeve extending into the nitrogen chamber. The spiral seal is located at the end of the shaft sleeve extending out of the nitrogen chamber. The spiral seal is detachably sleeved on the conveying screw. A limiting ring is sleeved on the outer side of the spiral seal. The limiting ring includes two split half rings, both of which are connected to the first support body. A spiral groove is opened on the outer wall of the spiral seal. The rotation direction of the spiral groove is opposite to the rotation direction of the conveying screw, so as to limit the flow of material between the spiral groove and the inner wall of the limiting ring.

[0007] Preferably, a nitrogen window is provided on the first support body for introducing nitrogen into the nitrogen cavity.

[0008] According to the above technical solution, the beneficial effects of the utility model are:

[0009] The utility model supports the end of the conveying screw by two bearing assemblies. The two sets of tapered roller bearings can share the radial force of the conveying screw, and the thrust bearing can bear the axial force. A plurality of axial springs are also provided between the thrust bearing and the retaining cylinder, thereby effectively ensuring the axial installation of the conveying screw and the smooth rotation of the conveying screw. The ends of the sleeves of the first bearing assembly and the second bearing assembly away from the retaining cylinder are respectively installed with oil seal skeletons, which can avoid leakage of lubricating oil. A nitrogen chamber is also provided in the first support body, which can prevent oxidation of the material by nitrogen. An oil seal skeleton is also installed on the sleeve at the position where the conveying screw passes through the nitrogen chamber, and a spiral seal is provided on the end of the sleeve extending out of the nitrogen chamber. By providing a spiral groove on the outer wall of the spiral seal in the opposite direction to the direction of the conveying screw, the material can be restricted from flowing between the spiral groove and the inner wall of the limit ring, thereby preventing the material from leaking from the gap between the conveying screw and the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is the main view of the utility model;

[0011] Figure 2 It is a cross-sectional view of the present utility model.

[0012] Markings in the figure: 1. First support, 2. First end cover, 3. Second support, 4. Second end cover, 5. Stop cylinder, 6. Vent cap, 7. Nitrogen window, 8. Tapered roller bearing, 9. Thrust bearing, 10. Lubricating oil hole, 11. Nitrogen cavity, 12. Oil seal frame, 13. Limiting ring, 14. Spiral seal. DETAILED DESCRIPTION

[0013] With reference to the accompanying drawings, the specific implementation is as follows:

[0014] like Figure 1 、 2As shown, a driving end support member for a melt mixing system includes two support bodies, wherein the first support body includes a first support 1 and a first end cover 2, and the second support body includes a second support 3 and a second end cover 4. The interiors of the first support body and the second support body are respectively provided with through holes for penetrating a conveying screw, and a retaining cylinder 5 is provided between the first support body and the second support body. The inner hole of the retaining cylinder 5 is connected to the through holes of the first support body and the second support body, and a vent cap 6 is installed on the side wall of the retaining cylinder 5. A nitrogen cavity 11 is also provided in the first support body, and a nitrogen window 7 for introducing nitrogen into the nitrogen cavity 11 is opened, so that the nitrogen can prevent oxidation of the material; a first bearing assembly is provided in the through hole located on the side of the nitrogen cavity 11 close to the second support body, and a second bearing assembly is provided in the through hole of the second support body. A sealing assembly is also provided on the side of the first support body located on the nitrogen cavity 11 away from the second support body.

[0015] like Figure 2 As shown, the first bearing assembly includes a pair of tapered roller bearings 8 and a thrust bearing 9, the thrust bearing 9 is located between the tapered roller bearing 8 and the retaining cylinder 5, and a plurality of axial springs are provided between the end face of the thrust bearing 9 and the end of the retaining cylinder 5, the second bearing assembly includes a pair of tapered roller bearings 8, the tapered roller bearings 8 and the thrust bearing 9 are installed on the conveying screw through a sleeve, the two sets of tapered roller bearings can share the radial force of the conveying screw, the thrust bearing can bear the axial force, and the axial installation position of the conveying screw is further guaranteed by a plurality of axial springs, thereby realizing smooth rotation of the conveying screw, the first end cover 2 and the second end cover 4 are respectively provided with a lubricating oil hole 10, and the ends of the sleeves of the first bearing assembly and the second bearing assembly away from the retaining cylinder 5 are respectively provided with an oil seal skeleton 12 to prevent leakage of lubricating oil.

[0016] like Figure 2 As shown, the sealing assembly includes a sleeve and a spiral seal 14. An oil seal skeleton 12 is installed at the end of the sleeve extending into the nitrogen chamber 11. The spiral seal 14 is located at the end of the sleeve extending out of the nitrogen chamber 11. The spiral seal 14 is detachably sleeved on the conveying screw. A limiting ring 13 is sleeved on the outer side of the spiral seal 14. The limiting ring 13 includes two split half rings, both of which are connected to the first support body. A spiral groove is opened on the outer wall of the spiral seal 14. The rotation direction of the spiral groove is opposite to the rotation direction of the conveying screw, which can limit the flow of material between the spiral groove and the inner wall of the limiting ring 13.

Claims

1. A drive end support for a melt mixing system, characterized by: The invention comprises two supporting bodies, wherein the first supporting body comprises a first support (1) and a first end cover (2), and the second supporting body comprises a second support (3) and a second end cover (4). Through holes for penetrating the conveying screw are respectively provided inside the first supporting body and the second supporting body. A retaining cylinder (5) is provided between the first supporting body and the second supporting body. The inner hole of the retaining cylinder (5) is communicated with the through holes of the first supporting body and the second supporting body. A vent cap (6) is installed on the side wall of the retaining cylinder (5). A nitrogen cavity (11) is further provided in the first supporting body. A first bearing assembly is provided in the through hole of the nitrogen cavity (11) close to the second supporting body, and a second bearing assembly is provided in the through hole of the second supporting body. A sealing assembly is further provided on the side of the first supporting body located away from the nitrogen cavity (11). The first bearing assembly includes a pair of tapered roller bearings (8) and a thrust bearing (9), the thrust bearing (9) is located between the tapered roller bearings (8) and the retaining cylinder (5), and a plurality of axial springs are provided between the end surface of the thrust bearing (9) and the end of the retaining cylinder (5); the second bearing assembly includes a pair of tapered roller bearings (8), the tapered roller bearings (8) and the thrust bearing (9) are mounted on the conveying screw through a sleeve, a lubricating oil hole (10) is respectively provided on the first end cover (2) and the second end cover (4), and an oil seal skeleton (12) is respectively installed on the end of the sleeve of the first bearing assembly and the second bearing assembly away from the retaining cylinder (5); The sealing assembly includes a shaft sleeve and a spiral seal (14), wherein an oil seal skeleton (12) is installed at one end of the shaft sleeve extending into the nitrogen chamber (11), and the spiral seal (14) is located at the end of the shaft sleeve extending out of the nitrogen chamber (11). The spiral seal (14) is detachably sleeved on the conveying screw, and a limiting ring (13) is sleeved on the outer side of the spiral seal (14). The limiting ring (13) includes two split half rings, and the two half rings are connected to the first support body. A spiral groove is opened on the outer wall of the spiral seal (14), and the rotation direction of the spiral groove is opposite to the rotation direction of the conveying screw, so as to limit the flow of materials between the spiral groove and the inner wall of the limiting ring (13).

2. The drive end support member for a melt mixing system according to claim 1, characterized in that: A nitrogen window (7) for introducing nitrogen into the nitrogen cavity (11) is provided on the first support body.

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