Main shaft of high speed four-roll centrifuge

Abstract

The utility model discloses a kind of main shaft of high-speed four-roll centrifuge, including center spindle and cooling assembly, the center spindle non-bearing end end portion is provided with cooling cavity, the cooling assembly is located inside cooling cavity, the cooling assembly includes water inlet pipe and the water outlet pipe of sleeve joint in water inlet pipe outside, the water outlet pipe outer surface is provided with multiple groups of cooling groove in axial arrangement, a group of cooling groove is multiple and is arranged relative to water outlet pipe center circumference, the cooling groove one end is provided with the branch pipe of water inlet pipe through arrangement, the cooling groove other end is provided with backflow port.Cooling liquid enters cooling groove from water inlet pipe through branch pipe, after heat absorption, it is discharged reversely by backflow port into water outlet pipe, form the circulation path of water inlet pipe-cooling groove-water outlet pipe, cooling liquid is absorbed by heat exchange The heat generated by center spindle and centrifugal roller due to high-speed friction, heat radiation of molten body, avoid the thermal deformation problem generated by thermal stress in center spindle inside.

Description

Technical Field

[0001] This utility model belongs to the field of centrifuge technology, and in particular relates to a main shaft of a high-speed four-roll centrifuge. Background Technology

[0002] The four-roll centrifuge is a key piece of equipment in the production of rock wool products, and the quality of fiber formation directly affects the quality and yield of the rock wool products. To obtain finer and longer fibers, it is necessary to maintain the high-speed operation of the rollers and stabilize the tangential speed during the fiber formation process. When the main shaft drives the rollers to rotate at high speed, the main shaft must withstand the centrifugal force from the high-speed rotation, the torque force of the belt drive, and the frictional force with the bearings, all of which continuously generate heat. If the heat cannot be dissipated in time, the temperature of the main shaft will rise rapidly. If the main shaft is in a high-temperature state for a long time, thermal stress will be generated inside, causing damage and deformation to the main shaft and affecting normal operation. Utility Model Content

[0003] This utility model addresses the problems in the prior art by proposing the following technical solution: A main shaft for a high-speed four-roll centrifuge includes a central main shaft and a cooling assembly. A cooling chamber is provided at the non-load-bearing end of the central main shaft. The cooling assembly is located inside the cooling chamber and includes an inlet pipe and an outlet pipe sleeved on the outside of the inlet pipe. Multiple sets of cooling grooves are axially arranged on the outer surface of the outlet pipe. Each set of cooling grooves consists of multiple grooves arranged circumferentially relative to the center of the outlet pipe. A branch pipe is provided at one end of the cooling groove, which penetrates the inlet pipe. A return port is provided at the other end of the cooling groove. Coolant enters from the inlet pipe and then enters the cooling groove through the multiple sets of branch pipes. The coolant in the cooling groove carries away the heat in the cooling chamber and enters the outlet pipe through the return port. After flowing in the reverse direction, it is discharged from the outlet pipe, completing the cooling process.

[0004] As a preferred embodiment of the above technical solution, the cooling assembly further includes a rotating block, which is rotatably and sealingly fitted onto the non-load-bearing end of the central spindle. Water outlets are provided on both sides of the rotating block, and the rotating block is connected to the water outlet pipe. The middle part of the rotating block is fixedly connected to a section of the water inlet pipe.

[0005] As a preferred embodiment of the above technical solution, both the inlet pipe and the outlet pipe are provided with a heat insulation layer, and the outlet pipe is provided with a rubber soft layer on the outside, with the surface of the rubber soft layer of the outlet pipe being in contact with the inner surface of the cooling chamber.

[0006] As a preferred embodiment of the above technical solution, a pulley is provided at one end of the central spindle, a rear bearing is provided on one side of the central spindle, a roller head is provided at the other end of the central spindle, a front bearing is provided on one side of the central spindle, and the central spindle is fixed to the external frame by the front bearing and the rear bearing.

[0007] As a preferred embodiment of the above technical solution, an oil inlet pipe is provided on the outer side of the central spindle, and the two outlet ends of the oil inlet pipe extend to the front bearing and the rear bearing. The lubricating oil reaches the front bearing and the rear bearing through the oil inlet pipe, and a lubricating film is formed on the contact surface between the front bearing or the rear bearing and the central spindle. The oil mist lubrication method is used to reduce the friction and wear of the central spindle.

[0008] The beneficial effects of this utility model are as follows: 1. The coolant enters the cooling tank through the inlet pipe and branch pipe. After absorbing heat, it enters the outlet pipe through the return port and is discharged in the opposite direction, forming a circulation path of inlet pipe-cooling tank-outlet pipe. The coolant absorbs the heat generated by the high-speed friction and thermal radiation of the molten material in the central spindle and centrifugal roller through heat exchange, avoiding thermal deformation caused by thermal stress inside the central spindle, thereby ensuring the running accuracy of the central spindle and ensuring the centrifugal separation effect. 2. The oil inlet pipe adopts a dual-outlet design, which directly sprays oil mist onto the contact area of ​​the raceways of the front and rear bearings to form a lubricating film. This reduces oil consumption, while the compressed air in the oil mist carries away the heat from the bearings, thereby reducing the bearing temperature rise and reducing bearing wear. Attached Figure Description

[0009] Figure 1 The diagram shown is a schematic representation of the overall structure of the embodiment; Figure 2 The view shown is a front sectional view of an embodiment; Figure 3 The diagram shows the various parts of the cooling assembly in the embodiment. In the diagram: 10, central spindle; 11, cooling chamber; 20, water outlet pipe; 21, cooling tank; 22, return port; 30, water inlet pipe; 31, branch pipe; 40, rotating block; 41, water outlet; 50, pulley; 60, rear bearing; 70, roller head; 80, front bearing; 90, oil inlet pipe. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings.

[0011] Figures 1-3In a high-speed four-roll centrifuge, the main shaft includes a central main shaft 10 and a cooling assembly. A cooling chamber 11 is provided at the non-load-bearing end of the central main shaft 10. The cooling assembly is located inside the cooling chamber 11 and includes an inlet pipe 30 and an outlet pipe 20 sleeved on the outside of the inlet pipe 30. Multiple sets of cooling grooves 21 are axially arranged on the outer surface of the outlet pipe 20. Each set of cooling grooves 21 consists of multiple grooves arranged circumferentially relative to the center of the outlet pipe 20. One end of the cooling tank 21 is provided with a branch pipe 31 that passes through the inlet pipe 30. The two ends of the branch pipe 31 are threadedly connected to the inlet pipe 30 and the outlet pipe 20 respectively. The other end of the cooling tank 21 is provided with a return port 22. The coolant enters from the inlet pipe 30 and enters the cooling tank 21 through multiple sets of branch pipes 31. The coolant in the cooling tank 21 carries away the heat in the cooling chamber 11 and enters the outlet pipe 20 through the return port 22. After flowing in the opposite direction, it is discharged from the outlet pipe 20 to complete the cooling.

[0012] The cooling assembly also includes a rotating block 40, which is rotatably and sealingly fitted onto the non-load-bearing end of the central spindle 10. Water outlets 41 are provided on both sides of the rotating block 40. The rotating block 40 is connected to the water outlet pipe 20. The middle part of the rotating block 40 is fixedly connected to a section of the water inlet pipe 30.

[0013] When the central spindle 10 rotates at high speed, the rotating block 40 is kept stationary by the external device. The external cooling device injects coolant from the inlet pipe 30. The coolant is divided through multiple branch pipes 31. The divided coolant enters the cooling tank 21 to carry away the heat in the cooling chamber 11, and enters the outlet pipe 20 from the return port 22. After flowing in the reverse direction, it is discharged from the outlet pipe 20 back into the rotating block 40. The coolant is collected in the rotating block 40 and returns to the external device through the outlet 41.

[0014] The coolant enters the cooling tank 21 from the inlet pipe 30 through the branch pipe 31. After absorbing heat, it enters the outlet pipe 20 through the return port 22 and is discharged in the opposite direction, forming a circulation path of inlet pipe 30-cooling tank 21-outlet pipe 20. The coolant absorbs the heat generated by the high-speed friction and thermal radiation of the melt in the central spindle 10 and centrifugal roller through heat exchange, avoiding thermal deformation caused by thermal stress inside the central spindle 10, thereby ensuring the running accuracy of the central spindle 10 and ensuring the centrifugal separation effect.

[0015] Figures 1-3 In the process, both the inlet pipe 30 and the outlet pipe 20 are provided with heat insulation layers, and the outlet pipe 20 is provided with a rubber soft layer on the outside. The surface of the rubber soft layer of the outlet pipe 20 is in contact with the inner surface of the cooling cavity 11.

[0016] The rubber soft layer covering the outside of the water outlet pipe 20 fits tightly against the inner wall of the cooling chamber 11, forming a dynamic seal and absorbing the vibration energy of the main shaft, ensuring that the coolant in the multiple circumferentially arranged cooling tanks 21 passes through normally to complete the cooling of the cooling chamber 11.

[0017] Figures 1-2 In the process, a pulley 50 is provided at one end of the central spindle 10, a rear bearing 60 is provided on one side of the pulley 50, a roller head 70 is provided at the other end of the central spindle 10, and a front bearing 80 is provided on one side of the roller head 70. The central spindle 10 is fixed to the external frame by the front bearing 80 and the rear bearing 60.

[0018] An oil inlet pipe 90 is provided on the outer side of the central spindle 10. The two outlet ends of the oil inlet pipe 90 extend to the positions of the front bearing 80 and the rear bearing 60. Lubricating oil reaches the front bearing 80 and the rear bearing 60 through the oil inlet pipe 90. A lubricating film is formed on the contact surface between the front bearing 80 or the rear bearing 60 and the central spindle 10, and lubrication is carried out by oil mist lubrication to reduce the friction and wear of the central spindle 10.

[0019] The oil inlet pipe 90 adopts a dual-outlet design, directly spraying oil mist onto the raceway contact area of ​​the front bearing 80 and the rear bearing 60 to form a lubricating film. This reduces oil consumption, while the compressed air in the oil mist carries away the bearing heat, thereby reducing bearing temperature rise and wear. The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A main shaft of a high speed four-roll centrifuge, characterized in that, include: A central spindle (10) and a cooling assembly are provided. The non-load-bearing end of the central spindle (10) is provided with a cooling chamber (11). The cooling assembly is located inside the cooling chamber (11). The cooling assembly includes an inlet pipe (30) and an outlet pipe (20) sleeved on the outside of the inlet pipe (30). The outer surface of the outlet pipe (20) is provided with multiple sets of cooling grooves (21) arranged axially. Each set of cooling grooves (21) consists of multiple grooves arranged circumferentially relative to the center of the outlet pipe (20). A branch pipe (31) is provided at one end of the cooling tank (21) and is connected to the inlet pipe (30). A return port (22) is provided at the other end of the cooling tank (21). Coolant enters from the inlet pipe (30) and enters the cooling tank (21) through multiple branches (31). The coolant in the cooling tank (21) carries away the heat in the cooling chamber (11) and enters the outlet pipe (20) through the return port (22). After flowing in the reverse direction, it is discharged from the outlet pipe (20) to complete the cooling.

2. The main shaft of a high-speed four-roll centrifuge according to claim 1, characterized in that, The cooling assembly also includes a rotating block (40), which is rotatably sealed and fitted onto the non-load-bearing end of the central spindle (10). Water outlets (41) are provided on both sides of the rotating block (40). The rotating block (40) is connected to the water outlet pipe (20). The middle part of the rotating block (40) is fixedly connected to a section of the water inlet pipe (30).

3. The main shaft of a high-speed four-roll centrifuge according to claim 1, characterized in that, Both the inlet pipe (30) and the outlet pipe (20) are equipped with heat insulation layers. The outlet pipe (20) is equipped with a rubber soft layer on the outside. The surface of the rubber soft layer of the outlet pipe (20) is in contact with the inner surface of the cooling chamber (11).

4. The main shaft of a high-speed four-roll centrifuge according to claim 1, characterized in that, One end of the central spindle (10) is provided with a pulley (50), and a rear bearing (60) is provided on one side of the pulley (50). The other end of the central spindle (10) is provided with a roller head (70), and a front bearing (80) is provided on one side of the roller head (70). The central spindle (10) is fixed to the external frame by the front bearing (80) and the rear bearing (60).

5. The main shaft of a high-speed four-roll centrifuge according to claim 4, characterized in that, An oil inlet pipe (90) is provided on the outside of the central spindle (10). The two outlet ends of the oil inlet pipe (90) extend to the positions of the front bearing (80) and the rear bearing (60). Lubricating oil reaches the front bearing (80) and the rear bearing (60) through the oil inlet pipe (90). A lubricating film is formed on the contact surface between the front bearing (80) or the rear bearing (60) and the central spindle (10). The oil mist lubrication method is used to reduce the friction and wear of the central spindle (10).

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