High-temperature protection structure for main shaft of kneading machine

Abstract

The utility model relates to the technical field of high-temperature protection of a main shaft of a kneading machine, in particular to a high-temperature protection structure of the main shaft of the kneading machine. Comprising a shell, two main shafts are symmetrically and rotationally installed in the shell, and the two ends of each main shaft rotationally penetrate through the side wall of the shell and extend outwards. According to the utility model, the first arc-shaped pipe and the second arc-shaped pipe are adopted as the water-cooling main body and are matched with the first side lug, the second side lug, the circular groove and the cylinder in the connecting assembly to realize pre-fixation, and the rotating shaft, the cam and the rotating rod of the locking mechanism are used for quickly locking or unlocking, so that an operator only needs to reversely rotate the rotating rod; the long-diameter end of the cam rotates away from the close contact state with the inner wall of the circular groove, the expansion force between the cam and the circular groove disappears, the locking state between the cam and the circular groove is relieved, then the second arc-shaped pipe moves in the direction away from the shell to enable the cylinder to be separated from the circular groove, the whole water cooling assembly can be easily disassembled, and therefore the convenient disassembly and assembly effect is achieved. And maintenance and replacement are convenient.

Description

Technical Field

[0001] This utility model relates to the field of high temperature protection technology for kneader spindles, specifically, to a high temperature protection structure for kneader spindles. Background Technology

[0002] As a specialized piece of equipment for processing high-viscosity and high-viscoelasticity materials, the kneader generates significant frictional heat under the high-speed rotation and strong shearing action of the material. The continuous high temperature of the main shaft and its bearings not only accelerates the failure of lubricating oil and the aging of seals, but also causes serious failures such as bearing seizure and even main shaft deformation, directly threatening the safe operation of the equipment and product quality. Therefore, it is crucial to implement effective high-temperature protection for the main shaft, and water cooling has become a commonly used protection method due to its high efficiency and stability.

[0003] However, kneaders often require material changes or deep cleaning during operation based on production needs. This necessitates thorough maintenance of critical components. In addition, the seals and bearings of the water cooling system itself also require regular inspection or replacement. Traditional water cooling structures (such as integral welded water jackets or complex split structures secured by numerous bolts) are extremely cumbersome and time-consuming to operate when repeated disassembly and assembly are required for cleaning, maintenance, or replacement of vulnerable parts. Disassembly often requires specialized tools and the individual tightening of numerous bolts. Installation requires careful alignment and re-tightening evenly. The entire process is inefficient. The complex disassembly and assembly process not only increases the workload and operational risks for maintenance personnel but also restricts production efficiency due to excessive downtime. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature protection structure for the main shaft of a kneader, so as to solve the problems mentioned in the background art.

[0005] Traditional water-cooled structures are extremely cumbersome and time-consuming to operate when they require repeated disassembly and assembly for cleaning, maintenance, or replacement of vulnerable parts.

[0006] To address the above problems, this utility model aims to provide a high-temperature protection structure for the main shaft of a kneader, comprising a housing. Two main shafts are symmetrically and rotatably mounted inside the housing. Both ends of each main shaft rotatably penetrate the side wall of the housing and extend outwards. Bearing seats are fixedly installed on the outer side wall of the housing at positions corresponding to the two main shafts. Bearings are installed inside the bearing seats, and the inner rings of the bearings are fixedly connected to the corresponding main shafts. A water-cooling assembly for cooling itself is provided on the bearing seats. The water-cooling assembly includes a first arc-shaped tube and a second arc-shaped tube. A connecting assembly is provided between the first and second arc-shaped tubes. The connecting assembly is used to splice the first and second arc-shaped tubes into an annular tube. When the first and second arc-shaped tubes are spliced ​​into an annular tube by the connecting assembly, the annular tube contacts the outer side wall of the bearing seat.

[0007] As a further improvement to this technical solution, pipe joints are fixedly connected to the middle positions of the outer arc surfaces of the first and second arc-shaped pipes, and the two pipe joints are respectively used to connect the inlet pipe and outlet pipe of the external chiller.

[0008] As a further improvement to this technical solution, the connecting assembly includes two first side ears that are respectively fixedly connected to both ends of the outer arc surface of the first arc tube. A circular groove is provided on the first side ear. A second side ear is fixedly connected to both ends of the outer arc surface of the second arc tube. A cylinder is fixedly connected to the second side ear at the position corresponding to the circular groove.

[0009] As a further improvement to this technical solution, when the first arc-shaped tube and the second arc-shaped tube are spliced ​​together to form an annular tube, the cylinder is embedded in the corresponding circular groove.

[0010] As a further improvement to this technical solution, a locking mechanism is provided on the first side ear. The locking mechanism includes a rotating shaft that is eccentrically mounted on a cylinder. A cam is fixedly connected to the circumferential side wall of the rotating shaft. One end of the rotating shaft rotates through the cylinder and the first side ear in sequence and is fixedly connected to a rotating rod.

[0011] As a further improvement to this technical solution, when the cylinder is embedded in the corresponding circular groove, the arc surface of the cam contacts the inner circumference of the circular groove, and the minimum distance between the axis of rotation and the inner circumference of the circular groove is less than the radius of the cam.

[0012] As a further improvement to this technical solution, the water-cooling assembly also includes four blocks fixedly connected to the outer wall of the housing. When the first arc-shaped tube and the second arc-shaped tube are spliced ​​together to form an annular tube, the four blocks respectively contact the two first side ears and the two second side ears on the side away from the axis of the annular tube.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. The high-temperature protection structure of the kneader's main shaft uses a first arc-shaped tube and a second arc-shaped tube as the main body of the water cooling system. It is pre-fixed with the first side ear, the second side ear, the circular groove, and the cylinder in the connecting assembly. The locking mechanism uses the rotating shaft, cam, and rotating rod to quickly lock or unlock. The operator only needs to rotate the rotating rod in the opposite direction to make the long diameter end of the cam leave the tight contact state with the inner wall of the circular groove, so that the expansion force between the cam and the circular groove disappears and the locking state between them is released. Then, the second arc-shaped tube is moved away from the shell to make the cylinder disengage from the circular groove, so that the entire water cooling assembly can be easily removed, thus achieving convenient disassembly and assembly, and facilitating maintenance and replacement. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is one of the partial structural schematic diagrams of this utility model;

[0017] Figure 3 This is a second schematic diagram of a partial structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the overall structure of the water-cooling component of this utility model;

[0019] Figure 5 This is a partial structural schematic diagram of the water-cooling component of this utility model;

[0020] Figure 6 This is an exploded view of the overall structure of the water-cooling component of this utility model.

[0021] The meanings of the labels in the diagram are as follows:

[0022] 1. Housing; 11. Spindle;

[0023] 2. Bearing housing; 21. Bearing;

[0024] 3. Water-cooled assembly; 31. First arc-shaped tube; 311. First side lug; 312. Circular groove; 32. Second arc-shaped tube; 321. Second side lug; 322. Cylinder;

[0025] 33. Locking mechanism; 331. Rotating shaft; 332. Cam; 333. Rotating rod;

[0026] 34. Pipe fitting; 35. Stop block. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figures 1-3 As shown, the purpose of this embodiment is to provide a high-temperature protection structure for the main shaft of a kneader, including a housing 1. Two main shafts 11 are symmetrically and rotatably installed inside the housing 1. Both ends of the main shafts 11 rotatably penetrate the side wall of the housing 1 and extend outward. A sealed bearing is provided between the position on the housing 1 through which the main shafts 11 penetrate and the main shafts 11 to prevent material leakage inside the housing 1. One end of the main shaft 11 is coaxially and fixedly connected to the output shaft of an external motor through a coupling. The two motors drive the two main shafts 11 to rotate synchronously so that the kneader can work.

[0030] To improve the rotational stability of the spindle 11 and guide and limit its movement, bearing seats 2 are fixedly installed on the outer side wall of the housing 1 at positions corresponding to the two spindles 11. Bearings 21 are installed inside the bearing seats 2, and the inner ring of the bearing 21 is fixedly connected to the corresponding spindle 11.

[0031] When the spindle 11 drives the inner ring of the bearing 21 to rotate at high speed for a long time, friction will cause the temperature of the bearing 21 to rise. Both the bearing 21 and the bearing housing 2 are made of metal, so the heat will be quickly conducted to the outer shell of the bearing housing 2. In order to prevent the heat from accumulating and causing the bearing housing 2 to continue to heat up or even fail, a water cooling component 3 is provided on the bearing housing 2. The water cooling component 3 cools the bearing housing 2, and then uses heat transfer to effectively cool the bearing 21 and the spindle 11, so as to achieve high temperature protection for the spindle 11.

[0032] The structure of water-cooled component 3 is detailed below, referring to... Figure 5 The water-cooling assembly 3 includes a first arc-shaped tube 31 and a second arc-shaped tube 32. Both the first arc-shaped tube 31 and the second arc-shaped tube 32 are made of stainless steel with excellent thermal conductivity. A connecting assembly is provided between the first arc-shaped tube 31 and the second arc-shaped tube 32. The connecting assembly is used to splice the first arc-shaped tube 31 and the second arc-shaped tube 32 to form an annular tube. When the first arc-shaped tube 31 and the second arc-shaped tube 32 are spliced ​​to form an annular tube by the connecting assembly, the interiors of the first arc-shaped tube 31 and the second arc-shaped tube 32 are connected, and the annular tube contacts the outer wall of the bearing seat 2.

[0033] Pipe connectors 34 are fixedly connected at the midpoint of the outer arc surfaces of the first arc-shaped tube 31 and the second arc-shaped tube 32. The two pipe connectors 34 are used to connect the inlet and outlet pipes of the external chiller, respectively. Both the inlet and outlet pipes of the chiller are flexible hoses, facilitating subsequent disassembly and assembly of the water-cooling assembly 3. Once the piping is connected, the chiller pumps chilled water through its outlet pipe and one pipe connector 34 into the annular tube. After heat exchange in the annular tube, the water flows back to the chiller through the other pipe connector 34 and the inlet pipe. During this cycle, the chilled water absorbs heat, lowering the wall temperature of the first arc-shaped tube 31 and the second arc-shaped tube 32. The low-temperature arc-shaped tubes, through heat conduction at the contact surface, cool the outer shell of the bearing housing 2, thereby transferring the cooling effect sequentially to the internal bearing 21 and spindle 11, ultimately achieving high-temperature protection for the spindle 11. The chiller is a commercially available, mature product, and its working principle will not be elaborated here.

[0034] It should be noted that rubber sealing rings are fixedly embedded on the contact surfaces where the first arc-shaped tube 31 and the second arc-shaped tube 32 are spliced ​​together. When the first arc-shaped tube 31 and the second arc-shaped tube 32 are spliced ​​together to form an annular tube, these sealing rings fit tightly to prevent the cooling water inside the annular tube from leaking. In addition, in order to further enhance the heat transfer efficiency between the first arc-shaped tube 31, the second arc-shaped tube 32 and the bearing housing 2, thermally conductive silicone grease can be filled between the contact surfaces of the first arc-shaped tube 31, the second arc-shaped tube 32 and the bearing housing 2.

[0035] The structure of the connecting components is detailed below, please refer to... Figure 3 and Figure 4 The connecting component includes two first side ears 311 fixedly connected to both ends of the outer arc surface of the first arc tube 31. The first side ears 311 are provided with circular grooves 312. The second side ears 321 are fixedly connected to both ends of the outer arc surface of the second arc tube 32. A cylinder 322 is fixedly connected to the second side ears 321 at the position corresponding to the circular groove 312. When the first arc tube 31 and the second arc tube 32 are spliced ​​to form an annular tube, the cylinder 322 is embedded in the corresponding circular groove 312 to achieve the pre-fixation of the first arc tube 31 and the second arc tube 32.

[0036] Each first side ear 311 is also provided with a locking mechanism 33. The locking mechanism 33 includes a rotating shaft 331 eccentrically mounted on a cylinder 322. A cam 332 is fixedly connected to the circumferential side wall of the rotating shaft 331. Both ends of the cam 332 are arc-shaped. One end of the rotating shaft 331 rotates through the cylinder 322 and the first side ear 311 in sequence and is fixedly connected to a rotating rod 333.

[0037] When the cylinder 322 is embedded in the corresponding circular groove 312, the arc-shaped surface of the cam 332 contacts the inner circumferential wall of the circular groove 312. The minimum distance between the axis of the rotating shaft 331 and the inner circumferential wall of the circular groove 312 is less than the radius of the cam 332. When the operator holds the end of the rotating rod 333 away from the rotating shaft 331 and rotates the rotating rod 333, the rotating rod 333 forms a force-saving lever, thus easily rotating the rotating shaft 331 and the cam 332. The contour design of the cam 332 causes the radial distance between its surface and the contact point with the inner wall of the circular groove 312 to gradually increase during rotation. Since the rotating shaft 331 is eccentrically installed, when the operator presses the locking direction... When the rotating rod 333 is rotated, the long-diameter end of the cam 332 gradually turns towards the inner wall of the circular groove 312. At this time, the actual radius of the contact point between the long-diameter end of the cam 332 and the inner wall of the circular groove 312 is greater than the distance from the axis of the rotating shaft 331 to the contact point (i.e., the radius of the circular groove 312). This forces the long-diameter end of the cam 332 to open the circular groove 312, generating a huge radial expansion force on the inner wall of the circular groove 312. This causes the friction between the cam 332 and the circular groove 312 to increase sharply, thereby locking the cam 332 inside the circular groove 312 and restricting the cylinder 322 from moving out of the corresponding circular groove 312, ensuring that the first arc tube 31 and the second arc tube 32 are stably spliced.

[0038] To prevent the first arc-shaped tube 31 and the second arc-shaped tube 32 from rotating and affecting the locking when the rotating rod 333 is rotated, the water-cooling assembly 3 also includes four blocks 35 fixedly connected to the outer wall of the housing 1. When the first arc-shaped tube 31 and the second arc-shaped tube 32 are spliced ​​to form an annular tube, the four blocks 35 respectively contact the two first side ears 311 and the two second side ears 321 on the side away from the axis of the annular tube. The four blocks 35 together restrict the rotation of the annular tube around the axis of the main shaft 11.

[0039] When it is necessary to remove the water-cooled assembly 3, first stop the external chiller from working, then disconnect the inlet and outlet pipes of the chiller from the two pipe joints 34 respectively. Next, rotate the rotating rod 333 in the opposite direction so that the long diameter end of the cam 332 is no longer in close contact with the inner wall of the circular groove 312. The expansion force between the cam 332 and the circular groove 312 disappears, the friction decreases, and the locking state is released. Then move the second arc-shaped tube 32 away from the housing 1 so that the cylinder 322 is disengaged from the circular groove 312. The second arc-shaped tube 32 and the first arc-shaped tube 31 can be quickly removed from the bearing seat 2, realizing the convenient disassembly and assembly of the water-cooled assembly 3.

[0040] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A kneader spindle high temperature protection structure, comprising a shell (1), two spindles (11) are symmetrically rotatably installed inside the shell (1), both ends of the spindle (11) rotatably penetrate the side wall of the shell (1) and extend outward, characterized in that: The outer side wall of the shell (1) is fixedly installed with a bearing seat (2) corresponding to the position of the two main shafts (11), the inside of the bearing seat (2) is installed with a bearing (21), the inner ring of the bearing (21) is fixedly connected with the corresponding main shaft (11), the bearing seat (2) is provided with a water cooling assembly (3) for cooling itself, the water cooling assembly (3) comprises a first arc-shaped pipe (31) and a second arc-shaped pipe (32), a connecting assembly is arranged between the first arc-shaped pipe (31) and the second arc-shaped pipe (32), the connecting assembly is used for splicing the first arc-shaped pipe (31) and the second arc-shaped pipe (32) into a ring-shaped pipe, and when the first arc-shaped pipe (31) and the second arc-shaped pipe (32) are spliced into the ring-shaped pipe through the connecting assembly, the ring-shaped pipe is in contact with the outer side wall of the bearing seat (2).

2. The high temperature protection structure for the kneader spindle according to claim 1, characterized in that: The middle positions of the outer circular arc surfaces of the first arc-shaped pipe (31) and the second arc-shaped pipe (32) are fixedly connected with pipe joints (34), and the two pipe joints (34) are respectively used for connecting the water inlet pipe and the water outlet pipe of the external water cooler.

3. The high temperature protection structure for the kneader spindle according to claim 1, characterized in that: The connecting assembly comprises two first side ears (311) fixedly connected at two ends of the outer circular arc surface of the first arc-shaped pipe (31), a circular groove (312) is formed in the first side ear (311), the second arc-shaped pipe (32) is fixedly connected with a second side ear (321) at two ends of the outer circular arc surface, and a cylinder (322) is fixedly connected with the second side ear (321) at a position corresponding to the circular groove (312).

4. The high temperature protection structure for the kneader spindle according to claim 3, characterized in that: When the first arc-shaped pipe (31) and the second arc-shaped pipe (32) are splicing into a ring-shaped pipe, the cylinder (322) is embedded in the corresponding circular groove (312).

5. The high temperature protection structure for the kneader spindle according to claim 3, characterized in that: The first side ear (311) is provided with a locking mechanism (33), the locking mechanism (33) comprises a rotating shaft (331) eccentrically installed on the cylinder (322), a cam (332) is fixedly connected to the circumferential side wall of the rotating shaft (331), and one end of the rotating shaft (331) is rotatably penetrated through the cylinder (322) and the first side ear (311) and fixedly connected with a rotating rod (333).

6. The high temperature protection structure for the kneader spindle according to claim 5, characterized in that: When the cylinder (322) is embedded in the corresponding circular groove (312), the cam (332) is in contact with the circumferential inner wall of the circular groove (312), and the minimum distance between the axis of the rotating shaft (331) and the circumferential inner wall of the circular groove (312) is less than the radius of the cam (332).

7. The high temperature protection structure for the kneader spindle according to claim 3, characterized in that: The water cooling assembly (3) further comprises four stoppers (35) fixedly connected to the outer side wall of the shell (1), when the first arc-shaped pipe (31) and the second arc-shaped pipe (32) are connected into a ring-shaped pipe, the four stoppers (35) are respectively in contact with the sides of the two first side ears (311) and the two second side ears (321) away from the axis of the ring-shaped pipe.

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