CN113685531A - Transmission case for bilateral symmetry drive type double-screw extruder - Google Patents

Transmission case for bilateral symmetry drive type double-screw extruder Download PDF

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Publication number
CN113685531A
CN113685531A CN202111137613.6A CN202111137613A CN113685531A CN 113685531 A CN113685531 A CN 113685531A CN 202111137613 A CN202111137613 A CN 202111137613A CN 113685531 A CN113685531 A CN 113685531A
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CN
China
Prior art keywords
bearing
shaft
gear
shaft system
screw extruder
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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
CN202111137613.6A
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Chinese (zh)
Inventor
彭超
姜明智
陶玉雪
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Nanjing Zhitian Mechanical And Electrical Co ltd
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Nanjing Zhitian Mechanical And Electrical Co ltd
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Publication date
Application filed by Nanjing Zhitian Mechanical And Electrical Co ltd filed Critical Nanjing Zhitian Mechanical And Electrical Co ltd
Priority to CN202111137613.6A priority Critical patent/CN113685531A/en
Publication of CN113685531A publication Critical patent/CN113685531A/en
Pending legal-status Critical Current

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    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/021—Shaft support structures, e.g. partition walls, bearing eyes, casing walls or covers with bearings
    • 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
    • B29C48/252—Drive or actuation means; Transmission means; Screw supporting means
    • B29C48/2526—Direct drives or gear boxes
    • 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
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/50—Details of extruders
    • B29C48/505—Screws
    • B29C48/64—Screws with two or more threads
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Details Of Gearings (AREA)

Abstract

The invention discloses a transmission case for a bilateral symmetry drive type double-screw extruder, which comprises a lower case body and an upper case body which are matched with each other, wherein an upper transition shaft system is arranged in the upper case body; the bottom of the lower box body is provided with an opening for installing a lower transition shaft system; the invention adds a shaft system for sharing the torque transmission in the gear box, improves the bearing capacity of the transmission box, avoids the traditional installation method of gradually installing four installation surfaces by processing the upper transition shaft and the lower transition shaft into four layers of box bodies, reduces the assembly precision requirement of box body installation and improves the assembly efficiency by adopting the method of directly installing the upper opening and the lower opening of the box body.

Description

Transmission case for bilateral symmetry drive type double-screw extruder
Technical Field
The invention relates to a transmission case of a double-screw extruder, in particular to a transmission case for a bilateral symmetry driving type double-screw extruder.
Background
The transmission case is a core part of the parallel twin-screw extruder. Twin screw extruders require an even distribution of torque dynamics to two screws in a restricted space compared to other models. Different torque distribution technologies determine the bearing capacity of the gearbox, and even directly influence the service life and the performance of the whole machine.
The traditional parallel three-shaft torque distribution technology is a mature transmission technology of the double-screw extruder, and the gear box of the foreign double-screw extruder is mostly in the structure at the early stage. Because the center distance is limited, the torque transmitted by the gear on the output shaft is the bottleneck of bearing capacity.
To increase the torque, a bilaterally symmetrical drive structure was developed. An independent transition shaft system is changed into an upper transition shaft system and a lower transition shaft system, and gears on an output shaft are driven from the upper direction and the lower direction. The bearing capacity of the gears on the output shaft is theoretically only 50% of that of the conventional parallel three-shaft type. Meanwhile, as the two transition shafts are symmetrically distributed on the output shaft, the radial force of the output shaft is completely counteracted, an ideal couple drive is formed, and the service life of the output shaft is greatly prolonged.
Because the upper and lower transition shaft CD and the output shaft AB are not on the same plane, the bilateral symmetry driving structure is relatively complex, the assembly difficulty is large, and the manufacturing cost is high. In actual operation, three assembling surfaces exist, and the assembling precision and the assembling efficiency are affected.
Disclosure of Invention
The invention provides a transmission case for a bilateral symmetry driving type double-screw extruder, which is used for overcoming the defects of relatively complex structure, high assembly difficulty and high manufacturing cost of the bilateral symmetry driving transmission case in the prior art.
In order to solve the technical problems, the invention provides the following technical scheme:
the invention discloses a transmission case for a bilateral symmetry driving type double-screw extruder, which comprises a lower case body and an upper case body which are matched with each other, wherein an upper transition shaft system is arranged in the upper case body, a lower transition shaft system is arranged in the lower case body, an output shaft system A and an output shaft system B are arranged between the upper case body and the lower case body in parallel, and an input shaft system is arranged at one side of the matching position of the upper case body and the lower case body;
the top of the upper box body is provided with an opening for installing an upper transition shaft system; the bottom of the lower box body is provided with an opening for installing a lower transition shaft system.
Furthermore, the input shaft system comprises an input gear shaft, an input bearing A and an input bearing B are respectively positioned on two sides of a gear part of the input gear shaft, an input shaft end cover is arranged on one side of the input gear shaft, a flat key is arranged at the rear end of the input shaft end cover and connected with a coupler for transmitting torque, the input shaft system is installed inside a transmission case consisting of an upper case body and a lower case body, the axial gap is adjusted by the input shaft end cover, and the input shaft is connected to the transmission case through screws.
Further, output shafting A includes the integral key shaft, the both ends of integral key shaft are equipped with external splines A and external splines B respectively, and external splines A is the output spline for export gearbox moment of torsion is close to external splines A and external splines B punishment do not are equipped with bearing A and thrust bearing, and output shaft A's one end processing has the internal spline, its with integral key shaft A of integral key shaft pegs graft, be equipped with gear A on the output shaft A, gear A's both sides are equipped with bearing B and bearing C respectively, bearing C's rear is equipped with thrust bearing, thrust bearing's rear portion is equipped with the end cover, adjusts through screwed connection under on the box behind the axial clearance by the end cover.
Further, go up the transition shafting and include transition shaft, the both ends of going up transition shaft are provided with gear B and gear C respectively, gear B's both sides are equipped with bearing D and bearing E respectively, gear C's both sides are equipped with bearing F and bearing G respectively, be equipped with bearing distance cover between bearing E and the bearing F.
Further, lower transition shafting includes the transition axle, the both ends of going up the transition axle are provided with gear D and gear E respectively, gear D's both sides are equipped with bearing H and bearing I43 respectively, gear E's both sides are equipped with bearing J and bearing K respectively, be equipped with the bearing distance cover between bearing I and the bearing J.
Furthermore, the output shaft system B comprises an output shaft B, a bearing L, a bearing M, a bearing N and a tandem thrust bearing are sequentially arranged on two sides of the output shaft B respectively, a spline structure is arranged at the front end of the output shaft B, a gear is arranged at the middle end of the output shaft B, and the gear, the gear B and the gear D are engaged to transmit torque at the same time.
Furthermore, the upper transition shaft system is fixedly arranged in the upper box body through an upper bearing seat A, an upper bearing seat B and an upper bearing seat C which are arranged above the upper transition shaft system, and an opening in the top of the upper box body is sealed through an upper top plate.
Furthermore, the lower transition shaft system fixedly installs the upper transition shaft system inside the lower box body through a lower bearing seat A, a lower bearing seat B and a lower bearing seat C below the lower transition shaft system respectively, and the bottom opening of the lower box body is sealed through a lower bottom plate.
Furthermore, the upper transition shaft system and the lower transition shaft system are symmetrically arranged, and the output shaft system A is positioned between the upper transition shaft system and the lower transition shaft system.
The invention has the following beneficial effects: compared with the traditional parallel three-shaft structure, the novel parallel three-shaft transmission device has the advantages that one shaft system is added for sharing torque transmission in the gear box, and the bearing capacity of the transmission box is improved.
The installation mode of the upper transition shaft and the lower transition shaft avoids the traditional installation method of gradually installing four installation surfaces by processing four layers of box bodies, and adopts the direct installation method of the upper opening and the lower opening of the box bodies, thereby reducing the assembly precision requirement of box body installation and improving the assembly efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the input shaft system of the present invention;
FIG. 3 is a schematic structural diagram of an output shafting A according to the present invention;
FIG. 4 is a schematic structural diagram of an upper transition shafting C according to the present invention;
FIG. 5 is a schematic structural diagram of a lower transition shafting D according to the present invention;
FIG. 6 is a schematic structural diagram of an output shafting B according to the present invention.
In the figure: 1. inputting a shafting; 11. an input bearing A; 12. an input gear shaft; 13. an input bearing B; 14. an input shaft end cover; 15. a flat bond; 2. outputting a shafting A; 21. a bearing A; 22. a spline shaft; 23. a thrust bearing; 24. a bearing B; 25. an output shaft A; 26. a gear A; 27. a bearing C; 28. a thrust bearing; 29. an end cap; 3. an upper transition shafting; 31. a bearing D; 32. a gear B; 33. a bearing E; 34. a bearing F; 35. an upper transition shaft; 36. a gear C; 37. a bearing G; 38. a bearing distance sleeve; 4. a lower transition shafting; 41. a bearing H; 42. a gear D; 43. a bearing I; 44. a bearing J; 45. an upper transition shaft; 46. a gear E; 47. a bearing K; 48. a bearing distance sleeve; 5. outputting a shafting B; 51. a bearing L; 52. a bearing M; 53. an output shaft B; 54. a bearing N; 55. a tandem thrust bearing; 6. a lower box body; 61. a lower base plate; 62. a lower bearing seat A; 63. a lower bearing seat B; 64. a lower bearing seat C; 7. an upper box body; 71. an upper top plate; 72. an upper bearing seat A; 73. an upper bearing seat B; 74. and an upper bearing seat C.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
As shown in fig. 1-6, a transmission case for a bilateral symmetry driven type twin-screw extruder comprises a lower case body 6 and an upper case body 7 which are matched with each other, wherein an upper transition shaft system 3 is arranged in the upper case body 7, a lower transition shaft system 4 is arranged in the lower case body 6, an output shaft system a2 and an output shaft system B5 are arranged between the upper case body and the lower case body in parallel, and an input shaft system 1 is arranged at one side of a matching position of the upper case body and the lower case body;
the top of the upper box body 7 is provided with an opening for installing the upper transition shaft system 3; the bottom of the lower box body 6 is provided with an opening for installing the lower transition shaft system 4.
Input shafting 1 includes input gear shaft 12, and input bearing A11 and input bearing B13 are located respectively the both sides of input gear shaft 12 gear part, there is input shaft end cover 14 input gear shaft 12 one side, the rear end of input shaft end cover 14 is equipped with parallel key 15 and links to each other with the shaft coupling for the transmission moment of torsion, and input shafting 1 is installed inside the transmission case of compriseing last casing 7 and lower casing 6, adjusts the axial clearance by input shaft end cover 14, through screwed connection on the transmission case.
Output shafting A2 includes integral key shaft 22, integral key shaft 22's both ends are equipped with external splines A and external splines B respectively, and external splines A is the output spline for output gearbox moment of torsion, is close to external splines A and external splines B go out to be equipped with bearing A21 and thrust bearing 23 respectively, and output shaft A25's one end processing has the internal spline, its with integral key shaft A grafting of integral key shaft 22, be equipped with gear A26 on the output shaft A25, gear A26's both sides are equipped with bearing B24 and bearing C27 respectively, bearing C27's rear is equipped with thrust bearing 28, thrust bearing 28's rear portion is equipped with end cover 29, adjusts through screwed connection under on box 6 behind the axial clearance by end cover 29.
Go up transition shafting 3 and include transition shaft 35, the both ends of going up transition shaft 35 are provided with gear B32 and gear C36 respectively, gear B32's both sides are equipped with bearing D31 and bearing E33 respectively, gear C36's both sides are equipped with bearing F34 and bearing G37 respectively, be equipped with bearing distance cover 38 between bearing E33 and the bearing F34.
Lower transition shafting 4 includes transition axle 45 on, the both ends of going up transition axle 45 are provided with gear D42 and gear E46 respectively, gear D42's both sides are equipped with bearing H41 and bearing I43 respectively, gear E46's both sides are equipped with bearing J44 and bearing K47 respectively, be equipped with bearing distance cover 48 between bearing I43 and the bearing J44.
The output shaft system B5 comprises an output shaft B53, a bearing L51, a bearing M52, a bearing N54 and a tandem thrust bearing 55 are respectively and sequentially arranged on two sides of the output shaft B53, a spline structure is arranged at the front end of the output shaft B53, a gear is arranged at the middle end of the output shaft B53, and the gear, the gear B32 and the gear D42 are simultaneously engaged to transmit torque.
The combined surface of the upper box body 7 and the lower box body 6 is a horizontal combined surface, a shaft system hole of an output shaft A25 and a shaft system hole of an output shaft B53 are processed at the combined surface of the upper box body 7, a shaft system hole of an output shaft A25 and a shaft system hole of an output shaft B53 are processed at the combined surface of the lower box body 6, the output shaft A2 is positioned on the horizontal plane and is parallel to the output shaft B5, the combined surface of the upper box body 7, an upper bearing seat A72, an upper bearing seat B73 and an upper bearing seat C74 are fixedly installed, an upper transition shaft system hole is processed, and the combined surface of the lower box body 6, a lower bearing seat A62, a lower bearing seat B63 and a lower bearing seat C64 are fixedly installed. The upper transition shafting 3 and the lower transition shafting 4 are symmetrically arranged, and the output shafting A2 is positioned between the upper transition shafting 3 and the lower transition shafting 4.
The upper transition shaft 3 is fixedly arranged in the upper box body 7 through an upper bearing seat A72, an upper bearing seat B73 and an upper bearing seat C74 above the upper transition shaft 3, and the top opening of the upper box body 7 is sealed through an upper top plate.
The lower transition shaft system 4 fixedly installs the upper transition shaft system 3 inside the lower box body 6 through a lower bearing seat A62, a lower bearing seat B63 and a lower bearing seat C64 below the lower transition shaft system, and the bottom opening of the lower box body 6 is sealed through a lower bottom plate.
The lower box body 6 and the upper box body 7 are positioned and processed by pin holes and are fixed and assembled by bolts.
The lower box body 6 is provided with a shaft hole of an output shaft A2, the output shaft A2 is arranged in a horizontal plane and is parallel to the output shaft B5, and the output shaft A2 is arranged inside the lower box body 6 through the shaft hole.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (9)

1. A transmission case for a bilateral symmetry drive type double-screw extruder is characterized by comprising a lower case body and an upper case body which are matched with each other, wherein an upper transition shaft system is arranged in the upper case body, a lower transition shaft system is arranged in the lower case body, an output shaft system A and an output shaft system B are arranged between the upper case body and the lower case body in parallel, and an input shaft system is arranged on one side of a matching position of the upper case body and the lower case body;
the top of the upper box body is provided with an opening for installing an upper transition shaft system; the bottom of the lower box body is provided with an opening for installing a lower transition shaft system.
2. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the input shaft includes an input gear shaft, the input bearing a and the input bearing B are respectively located at both sides of the gear part of the input gear shaft, an input shaft end cap is provided at one side of the input gear shaft, a flat key is provided at a rear end of the input shaft end cap and connected to the shaft coupling for transmitting torque, the input shaft is installed inside the transmission case composed of the upper case and the lower case, an axial gap is adjusted by the input shaft end cap, and the input shaft is connected to the transmission case by screws.
3. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the output shaft system a includes a spline shaft, both ends of the spline shaft are respectively provided with an external spline a and an external spline B, the external spline a is an output spline for outputting gearbox torque, a bearing a and a thrust bearing are respectively provided near the external spline a and the external spline B, one end of the output shaft a is provided with an internal spline which is inserted into the spline shaft a of the spline shaft, the output shaft a is provided with a gear a, both sides of the gear a are respectively provided with a bearing B and a bearing C, the thrust bearing is provided behind the bearing C, the rear part of the thrust bearing is provided with an end cover, and the thrust bearing is connected to the lower case body through screws after the axial clearance is adjusted by the end cover.
4. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the upper transition shaft system comprises an upper transition shaft, a gear B and a gear C are respectively arranged at two ends of the upper transition shaft, a bearing D and a bearing E are respectively arranged at two sides of the gear B, a bearing F and a bearing G are respectively arranged at two sides of the gear C, and a bearing distance sleeve is arranged between the bearing E and the bearing F.
5. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the lower transition shaft system comprises an upper transition shaft, a gear D and a gear E are respectively arranged at two ends of the upper transition shaft, a bearing H and a bearing I are respectively arranged at two sides of the gear D, a bearing J and a bearing K are respectively arranged at two sides of the gear E, and a bearing distance sleeve is arranged between the bearing I and the bearing J.
6. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the output shaft system B comprises an output shaft B, bearings L, M, N and tandem thrust bearings are respectively and sequentially arranged on both sides of the output shaft B, a spline structure is arranged at the front end of the output shaft B, a gear is arranged at the middle end of the output shaft B, and the gear, the gear B and the gear D simultaneously participate in meshing to transmit torque.
7. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the upper transition shaft is fixedly installed inside the upper case through an upper bearing seat A, an upper bearing seat B and an upper bearing seat C above the upper transition shaft, and the top opening of the upper case is closed through an upper top plate.
8. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the lower transition shaft is fixedly installed inside the lower case through a lower bearing seat A, a lower bearing seat B and a lower bearing seat C below the lower transition shaft, and the bottom opening of the lower case is closed through a lower bottom plate.
9. The transmission case for the bilaterally symmetrical driven twin-screw extruder according to claim 1, wherein the upper transition shaft system and the lower transition shaft system are symmetrically arranged, and the output shaft system a is located between the upper transition shaft system and the lower transition shaft system.
CN202111137613.6A 2021-09-27 2021-09-27 Transmission case for bilateral symmetry drive type double-screw extruder Pending CN113685531A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111137613.6A CN113685531A (en) 2021-09-27 2021-09-27 Transmission case for bilateral symmetry drive type double-screw extruder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202111137613.6A CN113685531A (en) 2021-09-27 2021-09-27 Transmission case for bilateral symmetry drive type double-screw extruder

Publications (1)

Publication Number Publication Date
CN113685531A true CN113685531A (en) 2021-11-23

Family

ID=78587231

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111137613.6A Pending CN113685531A (en) 2021-09-27 2021-09-27 Transmission case for bilateral symmetry drive type double-screw extruder

Country Status (1)

Country Link
CN (1) CN113685531A (en)

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