A combined turbine separation mechanism of streamline configuration

Abstract

The application relates to a turbine technical field, and relates to a combined turbine separation mechanism with a streamline structure, which comprises an upper turbine and a lower turbine, a plurality of blade bodies are arranged between the upper turbine and the lower turbine, a plurality of groups of the blade bodies are in a streamline structure, and the upper turbine is oppositely arranged with the lower turbine. The blade body is arranged as a streamline structure with a front edge circular arc and a front edge guide angle arranged on the front edge, and a rear edge narrowing angle arranged on the rear edge. The streamline blade can smoothly cut a slurry flow field when rotating at high speed. The front edge circular arc can eliminate stress concentration points, the fatigue fracture resistance of the blade is obviously improved under high-speed rotation, the front edge guide angle and the rear edge narrowing angle make the slurry flow more smoothly on the blade surface, local vortex and dead zones are avoided, there is no right-angle mutation turbulence structure as a whole, and then the negative pressure vortex on the back of the blade is eliminated from the source, fine grinding beads are avoided from being entrained by the negative pressure and discharged with finished slurry, and the problems of bead running and material accumulation and blockage are eliminated.

Description

Technical Field

[0001] This invention belongs to the field of turbine technology, and specifically relates to a streamlined combined turbine separation mechanism. Background Technology

[0002] With the rapid development of industries such as new energy materials, electronic ceramics and high-end coatings, higher requirements have been placed on the separation accuracy and operational stability of ultrafine powder grinding equipment. As the core component for separating media and finished slurry in sand mills, the turbine separation mechanism's structure and performance directly determine the grinding efficiency, product purity and equipment maintenance costs.

[0003] In the existing technology, the blades of traditional turbine separation mechanisms mostly adopt straight plates or simple arc structures. There are right angles or sharp transitions between the leading and trailing edges of the blades. When rotating at high speed, a negative pressure vortex zone is easily formed on the back of the blades, causing fine grinding beads to be carried away by the negative pressure and discharged with the finished slurry, resulting in bead run-through, product contamination, and aggravated screen blockage. Meanwhile, most existing turbines are integral welded or cast structures. When a single blade wears out, the entire turbine needs to be replaced. The cost of parts is high and the disassembly and assembly takes a long time. The equipment downtime maintenance cycle is long and it is difficult to adapt to the needs of continuous industrial production. In addition, traditional turbine ends lack an active feeding structure, and material deposition dead zones are easily formed at the top and bottom of the grinding chamber. The frequency of collision and shearing between the grinding media and the material is insufficient, resulting in poor grinding uniformity and high energy consumption, which cannot meet the high-efficiency and stable grinding processing requirements of high-precision ultrafine powders. Summary of the Invention

[0004] The purpose of this invention is to provide a simple and rationally designed streamlined combined turbine separation mechanism to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A streamlined combined turbine separation mechanism includes an upper turbine and a lower turbine. Multiple blade bodies are provided between the upper turbine and the lower turbine. The multiple sets of blade bodies have a streamlined structure. The upper turbine and the lower turbine are arranged opposite to each other. The hub end faces of the upper turbine and the lower turbine are provided with annular arrays of insertion slots. The upper and lower ends of the multiple sets of blade bodies are respectively engaged in the corresponding insertion slots of the upper turbine and the lower turbine. The upper end face of the upper turbine and the lower end face of the lower turbine are each fixed with annular arrays of propulsion protrusions.

[0006] As a further optimization of the present invention, the blade body is provided with a leading edge guide angle, a trailing edge narrowing angle, and a leading edge arc.

[0007] As a further optimization of the present invention, the leading edge guide angle is 50°, the trailing edge narrowing angle is 15°, and the radius of the leading edge arc is R55.

[0008] As a further optimization of the present invention, the multiple blade bodies are arranged at uniform intervals around the turbine axis in the circumferential direction, and the included angle between the centers of two adjacent blade bodies is 12.5°.

[0009] As a further optimization of the present invention, the propulsion protrusion is provided with an inclined guide plane, and the inclined guide plane is arranged at an angle along the turbine rotation direction.

[0010] As a further optimization of the present invention, the propulsion protrusion is a strip-shaped structure, and the propulsion protrusion is evenly arranged circumferentially along the turbine rotation direction.

[0011] As a further optimization of the present invention, the circumferential solid width of the blade body is A, the flow gap between adjacent blade bodies is C, and the circumferential solid width A is greater than or equal to three times the flow gap C between adjacent blade bodies.

[0012] As a further optimization of the present invention, the upper turbine and the lower turbine adopt a split structure of upper and lower halves.

[0013] 1. The beneficial effects of the present invention are as follows: by setting the blade body as a streamlined structure with a leading edge arc and a leading edge guide angle at the leading edge and a trailing edge narrowing angle at the trailing edge, the streamlined blade can smoothly cut the slurry flow field when rotating at high speed. The leading edge arc can eliminate stress concentration points, and the fatigue fracture resistance of the blade is significantly improved under high speed rotation. The leading edge guide angle and the trailing edge narrowing angle make the slurry flow more smoothly on the blade surface, avoiding local eddies and dead zones. The overall structure has no right-angle sudden change in turbulence, thereby eliminating the negative pressure eddies on the back of the blade from the root, preventing fine grinding beads from being carried out with the finished slurry by negative pressure, and eliminating the problems of bead running and material accumulation blockage.

[0014] 2. This invention arranges multiple sets of blade bodies in a 12.5° equidistant annular array and limits the ratio of blade body width to flow gap to three times, so that the circumferential flow field of the turbine is uniformly distributed and the graded flow channel is regular and uniform. When rotating at high speed, a stable centrifugal pressure gradient can be formed in the grinding chamber, realizing the precise graded separation of slurry and grinding beads, effectively improving the media separation efficiency and grinding uniformity, and avoiding the problems of local flow velocity disturbance and incomplete separation.

[0015] 3. The beneficial effects of the present invention are as follows: by setting multiple sets of propulsion protrusions in an annular array on the upper end face of the upper turbine and the lower end face of the lower turbine, and the propulsion protrusions are provided with inclined guide planes arranged at an angle along the turbine rotation direction, when the turbine rotates, the inclined guide planes apply radial and tangential composite thrust to the material and grinding media in the cavity, forcibly driving the material and grinding media deposited and stagnant at the top of the grinding cylinder to participate in the full-domain circulation flow, eliminating the grinding dead zone, and greatly increasing the collision and shearing frequency of the grinding media and the material, thereby improving the grinding uniformity and overall grinding efficiency.

[0016] 4. The beneficial effects of the present invention are as follows: by opening the insertion slots in an annular array on the hub end face of the upper turbine and the lower turbine, and respectively snapping the upper and lower ends of multiple sets of streamlined blade bodies into the corresponding insertion slots, a detachable combination connection between the blades and the turbine hub is realized. When a single blade is worn or damaged, there is no need to replace the entire turbine. Only the corresponding blade needs to be replaced to restore the performance, thereby reducing the cost of purchasing and replacing parts. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is an exploded view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the front structure of the turbine in this invention; Figure 4 This is a schematic diagram of the rear structure of the turbine in this invention; Figure 5 This is a schematic diagram of the front structure of the turbine of the present invention; Figure 6 This is a schematic diagram of the front structure of the turbine of the present invention; Figure 7 This is a schematic diagram of the structure of the blade body of the present invention; Figure 8 This is a schematic diagram of the structure of the turbine and blade body under this invention.

[0018] In the diagram: 1. Upper turbine; 2. Lower turbine; 3. Blade body; 301. Leading edge guide angle; 302. Trailing edge narrowing angle; 303. Leading edge arc; 4. Insertion groove; 5. Propulsion protrusion; 501. Inclined guide plane. Detailed Implementation

[0019] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0020] Example: Please refer to Figures 1-6 A streamlined combined turbine separator mechanism includes an upper turbine 1 and a lower turbine 2. The upper turbine 1 and lower turbine 2 form the main turbine structure, supporting the blade bodies 3 and providing rotational driving force. Multiple blade bodies 3 are arranged between the upper turbine 1 and the lower turbine 2. The multiple sets of blade bodies 3 have a streamlined structure. The streamlined profile allows the slurry to flow smoothly against the blade surface during high-speed rotation, avoiding the formation of local eddies and negative pressure zones. The upper turbine 1 and lower turbine 2 are arranged opposite to each other, and the hub end faces of both the upper turbine 1 and the lower turbine 2 have a ring array of inserts. The connecting slot 4 is used to provide an installation and positioning interface for the blade body 3, enabling the blade body 3 to be detachably connected. The upper and lower ends of multiple sets of blade bodies 3 are respectively snapped into the corresponding connecting slots 4 of the upper turbine 1 and the lower turbine 2. The snap-fit ​​structure is used to enable the quick installation and replacement of the blade body 3 without the need for additional fasteners. The upper end face of the upper turbine 1 and the lower end face of the lower turbine 2 are both fixed with multiple sets of propulsion protrusions 5 in a ring array. The propulsion protrusions 5 are used to apply a compound thrust to the material at the end of the grinding chamber when the turbine rotates, eliminating the top and bottom deposition dead zones.

[0021] Please see Figure 7 The blade body 3 is provided with a leading edge guide angle 301, a trailing edge narrowing angle 302, and a leading edge arc 303. The leading edge guide angle 301 guides the slurry to enter the blade flow channel smoothly at the optimal angle of attack, reducing the inflow impact loss. The trailing edge narrowing angle 302 makes the flow channel at the tail of the blade converge smoothly, avoiding the fall off of the wake vortex. The leading edge arc 303 eliminates the stress concentration at the sharp transition of the leading edge of the blade, and at the same time makes the slurry flow more smoothly. The whole structure has a non-right-angle sudden change turbulence structure. The three work together to eliminate the negative pressure vortex on the back of the blade from the root, and prevent the problem of fine grinding beads being carried by negative pressure and running out with the finished slurry.

[0022] Please see Figure 7 The leading edge guide angle 301 is 50° and the trailing edge narrowing angle 302 is 15°. The gradual reduction angle of the leading edge guide angle 301 and the trailing edge narrowing angle 302 makes the slurry flow more smoothly on the blade surface, avoiding local eddies and dead zones. The radius of the leading edge arc 303 is R55. The large arc transition can effectively disperse the impact load generated by the impact of the grinding beads.

[0023] Please see Figure 2 The number of blade bodies 3 is twenty-one, and the twenty-one blade bodies 3 are evenly spaced around the turbine axis in the circumferential direction. The center angle between two adjacent blade bodies 3 is 12.5°. The uniform arrangement angle of 12.5° makes the turbine circumferential direction form a very dense flow channel grid, eliminates dead angles in the flow channel, and ensures uniform flow field distribution.

[0024] Please see Figure 1 , Figure 3 and Figure 5The propulsion protrusion 5 is provided with an inclined guide plane 501, which is inclined along the turbine rotation direction. When the turbine rotates, the inclined guide plane 501 applies radial and tangential combined thrust to the material and grinding media in the cavity, forcibly driving the material deposited and stagnant at the top of the grinding cylinder to participate in the whole-domain circulation flow, greatly increasing the collision and shearing frequency of the grinding media and the material, thereby improving the overall grinding efficiency.

[0025] Please see Figure 1 , Figure 3 and Figure 5 The propulsion protrusion 5 is a strip structure, and the propulsion protrusion 5 is evenly distributed circumferentially along the turbine rotation direction. The strip structure reduces its own resistance to the flow while ensuring sufficient material pushing area. The even circumferential distribution makes the end thrust distribution symmetrical and balanced, avoiding periodic vibration and off-center load when the turbine rotates.

[0026] Please see Figure 8 The circumferential solid width of the blade body 3 is A, and the flow gap between adjacent blade bodies 3 is C. The circumferential solid width A is greater than or equal to three times the flow gap C between adjacent blade bodies 3, which can ensure that the blade root has sufficient structural strength. At the same time, the narrow slit channel generates a stable radial pressure gradient when rotating at high speed, with high pressure on the outside and low pressure on the inside, which is used to achieve precise classification and separation of slurry and grinding beads.

[0027] Please see Figure 2 The upper turbine 1 and the lower turbine 2 adopt a split structure, and the upper turbine 1 and the lower turbine 2 are fixedly connected by shaft end locking bolts. The split design allows the turbine to be opened axially, which facilitates cleaning of balls, cleaning of materials and internal maintenance, and greatly shortens the downtime for equipment maintenance. The shaft end locking bolts are used to lock the upper and lower turbine halves into a whole to ensure structural stability during high-speed rotation.

[0028] It should be noted that during equipment operation, the main shaft drives the upper turbine 1, lower turbine 2 and streamlined blade body 3 to rotate synchronously at high speed. During the rotation, the streamlined blade body 3 smoothly cuts the slurry. The slurry smoothly enters the blade channel at the optimal angle of attack along the leading edge guide angle 301 of the blade, then flows along the blade surface and smoothly leaves through the trailing edge narrowing angle 302. The slurry flows completely in line with the curved surface of the blade, forming a stable radial pressure gradient field on both the inner and outer sides of the blade. The pressure is high on the outside of the grinding chamber and low on the inside of the turbine center. Large-diameter agglomerated particles and high-density grinding beads are intercepted by the back of the blade and thrown back into the grinding chamber by the double obstruction of centrifugal force and high pressure on the outside and continue to be refined. The more fluid qualified fine slurry flows smoothly out of the turbine center along the narrow slit channel between the blades along the radial pressure gradient, realizing the dynamic and precise separation of grinding beads, coarse particles and qualified fine materials. At the same time, the propulsion protrusions 5 on the upper end face of the upper turbine 1 and the lower end face of the lower turbine 2 rotate synchronously with the turbine. The inclined plane on the propulsion protrusions 5 continuously impacts the material and grinding media in the cavity, giving the material and grinding beads radial and tangential composite motion speed, forcing the media and slurry that are deposited and stagnant at the top of the grinding cylinder to participate in the full-area circulation flow, increasing the collision and shearing frequency of the grinding beads and materials, completely eliminating the dead zone of deposition at the top of the cylinder, and improving the uniformity of grinding. When the equipment experiences blade wear, material buildup in the cavity, or blockage due to long-term operation, the operator can directly loosen the shaft end locking bolts and quickly disassemble the upper turbine 1 and lower turbine 2, which are split into upper and lower halves, to clean the blade gaps and the inside of the cavity. If a single blade is damaged, the corresponding blade body 3 can be removed and replaced directly from the insertion slot 4 of the upper and lower turbine 2 hubs without replacing the entire turbine, thus significantly reducing downtime for maintenance.

[0029] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A streamlined combined turbine separation mechanism, comprising an upper turbine (1) and a lower turbine (2), characterized in that: Multiple blade bodies (3) are provided between the upper turbine (1) and the lower turbine (2). The multiple sets of blade bodies (3) have a streamlined structure. The upper turbine (1) and the lower turbine (2) are arranged opposite to each other. The hub end faces of the upper turbine (1) and the lower turbine (2) are provided with a ring array of insertion slots (4). The upper and lower ends of the multiple sets of blade bodies (3) are respectively engaged in the corresponding insertion slots (4) of the upper turbine (1) and the lower turbine (2). The upper end face of the upper turbine (1) and the lower end face of the lower turbine (2) are fixed with multiple sets of propulsion protrusions (5) in a ring array.

2. The streamlined combined turbine separator mechanism according to claim 1, characterized in that: The blade body (3) is provided with a leading edge guide angle (301), a trailing edge narrowing angle (302) and a leading edge arc (303).

3. The streamlined combined turbine separator mechanism according to claim 2, characterized in that: The leading edge guide angle (301) is 50°, the trailing edge narrowing angle (302) is 15°, and the radius of the leading edge arc (303) is R55.

4. The streamlined combined turbine separator mechanism according to claim 1, characterized in that: Multiple blade bodies (3) are evenly spaced around the turbine axis in the circumferential direction, and the included angle between the centers of two adjacent blade bodies (3) is 12.5°.

5. The streamlined combined turbine separator mechanism according to claim 1, characterized in that: The propulsion protrusion (5) is provided with an inclined guide plane (501), and the inclined guide plane (501) is arranged inclined along the turbine rotation direction.

6. The streamlined combined turbine separator mechanism according to claim 1, characterized in that: The propulsion protrusion (5) is a strip structure, and the propulsion protrusion (5) is evenly arranged circumferentially along the turbine rotation direction.

7. The streamlined combined turbine separator mechanism according to claim 1, characterized in that: The circumferential solid width of the blade body (3) is A, the flow gap between adjacent blade bodies (3) is C, and the circumferential solid width A is greater than or equal to three times the flow gap C between adjacent blade bodies (3).

8. The streamlined combined turbine separator mechanism according to claim 1, characterized in that: The upper turbine (1) and the lower turbine (2) adopt a split structure of upper and lower halves.

Images