A bowl for an overhung centrifuge

Abstract

The utility model discloses a kind of rotary drum of upper suspension type centrifuge, the rotary drum body inside of rotary drum assembly is provided with bottom net and filter screen, several liquid outlet holes are opened on rotary drum body, liquid outlet hole is obliquely penetrated and opened on the wall surface of rotary drum body, the opening direction of liquid outlet hole from inside to outside is opposite to the rotation direction of rotary drum body, and the rotation of rotary drum body is provided with boost force when moisture is discharged from liquid outlet hole.The rotary drum body of the utility model adopts oblique penetration opening mode, improves the strength of rotary drum, is more conducive to improving separation effect by the way of improving rotational speed, improves the powder efficiency of centrifuge, saves energy consumption.

Description

Technical Field

[0001] This utility model relates to the field of centrifuge technology, and in particular to a rotating drum of an overhead centrifuge. Background Technology

[0002] A top-suspended centrifuge is a vertical solid-liquid separation device. Its rotating drum is suspended from the top of the frame by a top-suspended main shaft, achieving efficient separation through centrifugal force. It mainly includes a rotating drum, a top-suspended main shaft, and a motor. Top-suspended centrifuges are widely used in the separation of various sugars or similar materials.

[0003] Traditional top-suspended centrifuges typically have circular or elliptical straight holes in their drums. This straight hole design not only affects the overall strength of the drum but also tends to cause stress concentration in the middle of the hole, preventing the centrifuge from increasing its speed further and resulting in high energy consumption. Utility Model Content

[0004] In response to the shortcomings of existing top-suspended centrifuge drums, the applicant provides a top-suspended centrifuge drum with a reasonable structure, which changes the opening method, improves the drum strength, increases the centrifuge speed, and reduces energy consumption.

[0005] The technical solution adopted in this utility model is as follows: A top-suspended centrifuge drum has a bottom screen and a filter screen inside the drum body. Several liquid outlet holes are opened on the drum body. The liquid outlet holes are obliquely opened through the wall of the drum body. The opening direction of the liquid outlet holes from the inside to the outside is opposite to the rotation direction of the drum body. When water is discharged from the liquid outlet holes, it provides a boosting force for the rotation of the drum body.

[0006] As a further improvement to the above technical solution: The angle α between the centerline of the liquid outlet and the radial line is 10° to 80°.

[0007] The drum body has several liquid outlet holes arranged in several rows along the axial direction from top to bottom. The liquid outlet holes in adjacent rows are staggered, and a liquid outlet hole is arranged in a triangle with the two liquid outlet holes in the row above or below it.

[0008] The drum body includes a straight section and a conical section, with the conical section located at the bottom of the drum body.

[0009] The cone is wider at the top and narrower at the bottom. The cone surface tapers inward from top to bottom towards the center of the drum body. The larger diameter end of the cone is connected to the straight cylinder, and the smaller diameter end is connected to the bottom cover of the drum assembly.

[0010] The liquid outlet is located on the straight section.

[0011] When the drum body rotates at high speed to separate materials, a filter cake layer is formed inside the drum body, and the filter cake layer is located inside the filter screen.

[0012] The drum assembly is connected to a vertical main shaft, which is connected to a motor via a transmission component.

[0013] The transmission component includes a bearing housing assembly and a bearing housing seat. The bearing housing assembly is provided with a first spherical surface, and the bearing housing seat is provided with a second spherical surface. The bearing housing assembly and the bearing housing seat are engaged through the spherical surfaces.

[0014] An upper damping pad is provided above the spherical mating part of the bearing housing assembly and the bearing housing seat, and a lower damping pad is provided below the spherical mating part.

[0015] The beneficial effects of this utility model are as follows: The drum body of this invention adopts an oblique through-hole design. On the one hand, compared with the traditional straight through-hole design, the oblique through-hole design gives the drum body better strength. The stress concentration generated in the middle of the liquid outlet hole of the oblique through-hole design is at least 25% less than that of the straight through-hole design. Therefore, under the same material conditions, the rotation speed of the drum body with the oblique through-hole design can be increased by at least 25% compared with the rotation speed of the straight through-hole design. This is more conducive to improving the separation effect and increasing the powder efficiency of the centrifuge by increasing the rotation speed. On the other hand, since the opening direction of the liquid outlet hole from the inside to the outside is opposite to the rotation direction of the drum body, when water is discharged from the liquid outlet hole, it will give the drum body a boosting force in the same direction as the rotation, helping the drum body to rotate. The boosting force generated when water is discharged helps to reduce the load on the motor and save energy consumption. Under the same separation capacity, the energy consumption of the oblique through-hole separator can be reduced by at least 20% compared with the straight through-hole separator.

[0016] The staggered distribution of liquid outlet holes in adjacent rows of this invention can improve the overall strength of the drum body, which is beneficial to increasing the rotational speed of the drum body and improving the separation effect.

[0017] This invention sets the bottom of the drum body as a cone, which can significantly improve the strength of the drum body. The structure of the cone bottom is at least 40% stronger than the structure of the flat flange bottom. Attached Figure Description

[0018] Figure 1 This is an elevation sectional view of the present invention.

[0019] Figure 2 for Figure 1 The cross-sectional view of section AA shows the direction of the drum's rotation indicated by solid arrows and the direction of the water's reaction force indicated by dashed arrows.

[0020] Figure 3 for Figure 2 The enlarged view at point B shows the direction of the water's reaction force indicated by the dashed arrow.

[0021] Figure 4 This is a schematic diagram showing the distribution of holes in the drum.

[0022] In the picture: 10. Drum assembly; 1. Drum body; 11. Straight cylinder section; 111. Liquid outlet; 12. Conical section; 2. Bottom screen; 3. Filter screen; 4. Filter cake layer; 20. Spindle; 30. Motor; 40. Bearing housing assembly; 401. First spherical surface; 50. Bearing housing seat; 501. Second spherical surface; 60. Upper damping pad; 70. Lower damping pad. Detailed Implementation

[0023] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0024] like Figure 1 As shown, this utility model provides a drum for use in an overhead centrifuge. The drum assembly 10 is connected to a vertical main shaft 20, and the main shaft 20 is connected to a motor 30 through a transmission component.

[0025] like Figures 1 to 3 As shown, the inner side of the drum body 1 of the drum assembly 10 is provided with a bottom screen 2 and a filter screen 3. The bottom screen 2 is located between the drum body 1 and the filter screen 3, and the filter screen 3 is located on the innermost side. After the material enters the drum body 1, the drum body 1 rotates at high speed. Over time, a filter cake layer 4 will gradually form inside the drum body 1 and inside the filter screen 3. The moisture in the material will be discharged sequentially through the filter cake layer 4, the filter screen 3, the bottom screen 2, and the liquid outlet 111 of the drum body 1.

[0026] like Figure 1 As shown, the drum body 1 includes a straight cylindrical section 11 and a conical section 12. The conical section 12 is located at the bottom of the drum body 1, and is wider at the top and narrower at the bottom. The conical surface tapers inward from top to bottom towards the center of the drum body 1. The larger diameter end of the conical section 12 is connected to the straight cylindrical section 11, and the smaller diameter end is connected to the bottom cover of the drum assembly 10. Compared with the traditional flat flange bottom structure, setting the bottom of the drum body 1 as a conical section 12 can significantly improve the strength of the drum body 1. The strength of the conical bottom structure is at least 40% higher than that of the flat flange bottom structure.

[0027] like Figure 1 As shown, a plurality of liquid outlet holes 111 are evenly provided circumferentially on the wall surface of the straight cylindrical portion 11 of the drum body 1. Figure 2 , Figure 3As shown, the liquid outlet 111 is offset from the radial direction of the straight cylinder 11 and is obliquely opened through the wall of the straight cylinder 11. The angle α between the center line of the liquid outlet 111 and the radial line is 10° to 80°. The opening direction of the liquid outlet 111 from the inside to the outside is opposite to the rotation direction of the drum body 1. The drum body 1 adopts an oblique opening method: On the one hand, compared with the traditional straight hole opening method, the oblique hole opening method gives the drum body 1 better strength. The stress concentration generated in the middle of the oblique liquid outlet 111 is at least 25% smaller than that generated by the straight hole. Therefore, under the condition of using the same material, the rotation speed of the oblique hole drum body 1 can be increased by at least 25% compared with the straight hole type, which is more conducive to improving the separation effect and improving the powder efficiency of the centrifuge by increasing the rotation speed. On the other hand, since the opening direction of the liquid outlet 111 from the inside to the outside is opposite to the rotation direction of the drum body 1, the moisture of the material in the inner cavity of the drum body 1 is reduced from the outside to the inside. The discharge direction of the liquid outlet 111 is opposite to the rotation direction of the drum body 1. When water is discharged from the liquid outlet 111, it will give the drum body 1 a reaction force. The direction of this reaction force is opposite to the discharge direction. Since the discharge direction of water is opposite to the rotation direction, the direction of this reaction force is the same as the rotation direction. That is, when water is discharged from the liquid outlet 111, it will give the drum body 1 a boosting force in the same direction as the rotation direction, which will help the drum body 1 rotate. The boosting force generated when water is discharged helps to reduce the load on the motor 30 and save energy consumption. Under the same separation capacity, the energy consumption of the inclined hole separator can be reduced by at least 20% compared with the straight hole separator.

[0028] like Figure 4 As shown, the drum body 1 has several liquid outlet holes 111 arranged in several rows along the axial direction from top to bottom on the wall of the straight cylinder 11. The liquid outlet holes 111 in adjacent rows are staggered. A liquid outlet hole 111 is arranged in a triangular shape with the two liquid outlet holes 111 in the row above or below it. The staggered distribution can improve the overall strength of the drum body 1, which is conducive to increasing the rotation speed of the drum body 1 and improving the separation effect.

[0029] like Figure 1 As shown, the transmission components between the main shaft 20 and the motor 30 include a bearing housing assembly 40 and a bearing housing seat 50. The bearing housing assembly 40 is provided with a first spherical surface 401, and the bearing housing seat 50 is provided with a second spherical surface 501. The bearing housing assembly 40 and the bearing housing seat 50 are suspended through the spherical surface engagement. An upper damping pad 60 is provided above the spherical engagement portion of the bearing housing assembly 40 and the bearing housing seat 50, and a lower damping pad 70 is provided below the spherical engagement portion. The upper damping pad 60 and the lower damping pad 70 can offset the vibration generated by the shaking of the drum assembly 10 through slight oscillation, ensuring the normal operation of the equipment.

[0030] The above description is an explanation of the present utility model and not a limitation thereof. The present utility model can be modified in any form without departing from its spirit.

Claims

1. A rotating drum of an overhead centrifuge, characterized in that: The inner side of the drum body (1) of the drum assembly (10) is provided with a bottom screen (2) and a filter screen (3). Several liquid outlet holes (111) are opened on the drum body (1). The liquid outlet holes (111) are obliquely opened through the wall of the drum body (1). The opening direction of the liquid outlet holes (111) from the inside to the outside is opposite to the rotation direction of the drum body (1). When water is discharged from the liquid outlet holes (111), it provides a boosting force for the rotation of the drum body (1).

2. The rotating drum of the top-suspended centrifuge according to claim 1, characterized in that: The angle α between the centerline and the radial line of the liquid outlet (111) is 10° to 80°.

3. The rotating drum of the top-suspended centrifuge according to claim 1, characterized in that: The drum body (1) has several liquid outlet holes (111) arranged in several rows along the axial direction from top to bottom. The liquid outlet holes (111) in adjacent rows are staggered. A liquid outlet hole (111) is triangularly distributed with the two liquid outlet holes (111) adjacent to it in the upper or lower row.

4. The rotating drum of the top-suspended centrifuge according to claim 1, characterized in that: The drum body (1) includes a straight cylindrical part (11) and a conical part (12), with the conical part (12) located at the bottom of the drum body (1).

5. The rotating drum of the top-suspended centrifuge according to claim 4, characterized in that: The cone (12) is larger at the top and smaller at the bottom. The cone surface narrows inward from top to bottom towards the center of the drum body (1). The large diameter end of the cone (12) is connected to the straight cylinder (11), and the small diameter end is connected to the bottom cover of the drum assembly (10).

6. The drum of the top-suspended centrifuge according to claim 4, characterized in that: The liquid outlet (111) is located on the straight section (11).

7. The rotating drum of the top-suspended centrifuge according to claim 1, characterized in that: When the drum body (1) rotates at high speed to separate materials, a filter cake layer (4) is formed inside the drum body (1), and the filter cake layer (4) is located inside the filter screen (3).

8. The rotating drum of the top-suspended centrifuge according to claim 1, characterized in that: The drum assembly (10) is connected to the vertical main shaft (20), and the main shaft (20) is connected to the motor (30) through the transmission component.

9. The rotating drum of the top-suspended centrifuge according to claim 8, characterized in that: The transmission component includes a bearing housing assembly (40) and a bearing housing seat (50). The bearing housing assembly (40) is provided with a first spherical surface (401), and the bearing housing seat (50) is provided with a second spherical surface (501). The bearing housing assembly (40) and the bearing housing seat (50) are engaged by the spherical surfaces.

10. The drum of the top-suspended centrifuge according to claim 9, characterized in that: An upper damping pad (60) is provided above the spherical mating part of the bearing housing assembly (40) and the bearing housing seat (50), and a lower damping pad (70) is provided below the spherical mating part.

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