high speed mixer

Abstract

The utility model discloses a high -speed mixing machine relates to material mixing equipment technical field. It includes casing, drive assembly, stirring subassembly and triple combination seal, and casing is equipped with material entrance and bilateral support hollow axle neck, and drive assembly contains double motor and double belt pulley, and motor A is fixedly connected through impeller drive belt pulley and impeller shaft, and motor B is fixedly connected through casing drive belt pulley and support hollow axle neck, and the direction of double motor is opposite, and the impeller shaft of stirring subassembly is matched with support hollow axle neck through bearing, and the impeller is fixed on the impeller shaft, and triple combination seal is located between support hollow axle neck and impeller shaft. The utility model discloses through double motor reverse drive forms relative rotational speed superposition, and combines impeller optimization design, realizes high linear velocity stirring, and triple combination seal solves the problem of granular medium leakage, and the mixing uniformity reaches 98% or more, and is applicable to the precise mixing demand of chemical industry, new material and other fields.

Description

Technical Field

[0001] This utility model relates to the field of material mixing equipment technology, specifically to a high-speed mixer suitable for liquid-liquid and liquid-particulate materials, and particularly to a high-efficiency mixing equipment with high linear speed stirring and zero leakage sealing, which can be widely used in chemical, new materials, precision manufacturing and other scenarios with stringent requirements for mixing uniformity, sealing performance and equipment stability. Background Technology

[0002] In chemical production, new material preparation, and other fields, efficient and uniform mixing of liquid materials or liquid-particle mixtures is often required. The stirring speed, sealing performance, and mixing stability of the mixing equipment directly affect product quality and production efficiency. Currently, most mixers on the market adopt a single drive mode (impeller rotation only), coupled with traditional sealing structures and bearing support designs. In practical applications, this presents the following significant technical challenges: (a) High-speed mixing is difficult to achieve, resulting in low mixing efficiency. Existing mixers mostly use helical blade structures for their impellers. These blades lack rigidity and have low dynamic balance accuracy (typically at the gram level), making them prone to vibration, deformation, and even breakage during high-speed rotation. This limits the blade tip linear velocity, with conventional products only reaching a maximum of 100-150 m / s (corresponding to impeller speeds ≤3000 rpm). Furthermore, most impellers are single-unit, single-layer designs, resulting in limited mixing coverage. The fixed casing also allows material to settle at the bottom of the chamber, further reducing mixing uniformity. For materials containing particles or high viscosity, mixing time is long, and uniformity can only reach below 85%, failing to meet the demands of high-precision production. In addition, existing impeller blades lack wear-resistant coatings, making them prone to wear during long-term mixing of materials containing particles, further affecting mixing stability and service life.

[0003] (ii) Poor sealing performance, prone to leakage and insufficient compatibility Existing mixers typically employ single oil seals or simple combination seals, lacking specific designs for media containing particulate matter. Firstly, the lip material of single oil seals has poor wear resistance, making it susceptible to scratches from particles in the material, leading to seal failure and high leakage rates. This not only pollutes the production environment but also poses potential safety hazards. Secondly, the sealing components lack self-sealing properties due to thermal expansion, and gaps generated by friction during high-speed rotation cannot be automatically compensated, further exacerbating the leakage risk. For corrosive or precision materials requiring closed-loop mixing, existing sealing structures struggle to achieve zero leakage, limiting the equipment's application scenarios.

[0004] (iii) Poor compatibility of hybrid structures and insufficient centrifugal force Traditional mixers use only the shell as a material container, lacking auxiliary stirring structures on the inner wall. They rely solely on the hydrodynamic force generated by the impeller rotation to drive material flow, resulting in insufficient centrifugal force and easy stratification and sedimentation of the material. For high-viscosity materials or materials containing high-density particles, impeller stirring alone is insufficient to create a strong vortex flow field, leading to uneven particle dispersion and poor mixing effect.

[0005] In summary, existing mixers have significant shortcomings in terms of high-speed stirring, zero-leakage sealing, bearing system stability, and mixing adaptability, and cannot meet the needs of chemical, new materials and other fields for high-precision, high-efficiency and high-reliability mixing equipment. Therefore, developing a high-speed mixer with high-speed stirring capability and zero-leakage sealing performance has become an urgent technical problem to be solved in this field. Utility Model Content

[0006] Addressing the technical pain points of existing mixers, such as difficulty in achieving high linear velocity mixing, poor sealing performance leading to leakage, and poor mixing adaptability, this utility model provides a high-speed mixer. By optimizing the dual-motor reverse drive structure, impeller and housing design, sealing system, and lubrication system, it achieves high-speed mixing with an impeller tip linear velocity of 250m / s, zero-leakage sealing in particulate media, and efficient and uniform mixing, meeting the stringent requirements of chemical, new materials, and precision manufacturing industries.

[0007] This utility model's high-speed mixer overcomes the shortcomings of existing technologies through an integrated design of "dual-motor reverse drive + synergistic mixing structure + triple combined sealing." The specific technical solution is as follows: A high-speed mixer, comprising: The housing has a material inlet, and the middle section of the housing is integrally formed with a double-sided hollow support journal, which is used to adapt to the rotation support and sealing installation of the housing; The drive assembly includes two motors and two pulleys. The two motors are motor A, which drives the impeller shaft, and motor B, which drives the housing. The two pulleys are impeller drive pulley and housing drive pulley. One end of the impeller drive pulley is connected to the output shaft of motor A, and the other end is fixedly connected to the impeller shaft. One end of the housing drive pulley is connected to the output shaft of motor B, and the other end is fixedly connected to a hollow journal supporting one side. The stirring assembly includes an impeller shaft and an impeller. The impeller shaft extends transversely through the interior of the housing, with both ends passing through a hollow cavity supported by hollow journals on both sides. The impeller shaft is installed in conjunction with the supporting hollow journals via bearings. The impeller is fixed to the impeller shaft and rotates synchronously with the impeller shaft. The triple combination seal is located between the inner wall of the supporting hollow journal and the outer wall of the impeller shaft, with one set installed in each of the two supporting hollow journals. The triple combination seal includes, along the axial direction from the material end to the external environment, a graphite carbon ring packing seal, a wear-resistant oil seal, and a double carbon ring dynamic-static ring seal.

[0008] Preferably, motor A and motor B rotate in opposite directions. Motor A drives the impeller shaft to rotate at high speed, while motor B drives the housing to rotate at low speed, resulting in a superposition of relative speeds.

[0009] Preferably, the inner wall of the housing is provided with auxiliary blades, which are evenly distributed along the circumference of the inner wall of the housing and are staggered from the impeller blades.

[0010] Preferably, the impeller includes multiple sets of blades evenly spaced along the impeller shaft axis, each set of blades containing multiple straight plate-shaped blades evenly distributed around the circumference of the impeller shaft, the blades being thicker at the bottom and thinner at the top.

[0011] Preferably, the blade surface is coated with a tungsten carbide coating.

[0012] Preferably, the material inlet of the shell is equipped with a sealing cover, and a sealing ring is embedded in the inner side of the sealing cover to form a closed mixing environment.

[0013] Preferably, the graphite carbon ring packing seal comprises three graphite carbon ring packings.

[0014] Preferably, a fixed housing bearing seat is fitted to the outer side of the supporting hollow journal, and a bearing is provided inside the housing bearing seat; an annular bearing mounting groove is provided on the inner wall of the supporting hollow journal, and a bearing that mates with the impeller shaft is provided inside the annular bearing mounting groove.

[0015] Preferably, it also includes an oil tank supply system, which includes an oil tank, a gear pump and oil pipes. The oil pipes are respectively connected to the housing bearing seat and the oil passage interface supporting the hollow journal to form a lubricating oil circulation.

[0016] The beneficial effects of this utility model are: (i) The reverse driving force combined with the growth rate breaks through the limit of high linear speed. 1. Synergistic improvement of relative speed: Adopting a dual-motor reverse drive design for the impeller and the shell, the relative motion of "high-speed rotation of the impeller + low-speed rotation of the shell in the opposite direction" is superimposed to indirectly increase the effective mixing speed. Combined with the impeller's own high speed of 5000 rpm, a high linear velocity of 250 m / s at the blade tip is finally achieved, which is 67% higher than the existing products (maximum 150 m / s), completely breaking through the speed bottleneck of traditional mixers; 2. Enhanced mixing power: The strong shear force and vortex flow field generated by the reverse rotation greatly enhance the mixing force on the material, achieving efficient mixing without relying on the ultra-high absolute speed of a single impeller, thus reducing the operating load of the equipment; 3. Stability Guarantee: The relative speed superposition design avoids the vibration risk caused by the impeller simply pursuing absolute high speed. Combined with the milligram-level dynamic balance precision of the impeller and the rigid structure of the blades with "thick bottom and thin top", it ensures that the equipment has no abnormal vibration when running at high linear speed.

[0017] (II) A Double Leap in Mixing Efficiency and Uniformity 1. Seamless mixing: Multiple impellers are evenly spaced along the axial direction, and the blades of each set are evenly arranged around the circumference. Combined with the reverse rotation of the shell and the auxiliary blades on the inner wall, a three-dimensional vortex flow field is formed, which completely avoids material sedimentation and improves the mixing uniformity from below 85% to above 98%. 2. Significantly reduced mixing time: The synergistic effect of high linear velocity and strong vortex flow field increases the material diffusion rate by more than 40%. For materials containing particles or high viscosity, the mixing time is reduced by 50% compared with traditional equipment, significantly improving production efficiency. 3. Improved wear resistance and durability: The tungsten carbide coating on the blade surface increases wear resistance by 2 times, making it suitable for long-term mixing of materials containing particles, and extending the impeller's service life by 50% compared to traditional products.

[0018] (iii) Achieve zero-leakage sealing, suitable for media containing particles and corrosive substances. 1. Graded protection to prevent leakage: The first layer of graphite carbon ring packing blocks particles, the second layer of imported wear-resistant oil seal intercepts trace leaks, and the third layer of double carbon ring dynamic-static ring precision seal forms a full-process protection of "particle blocking-redundant interception-final sealing", achieving zero leakage for particulate media such as titanium alloy powder and alcohol. 2. Thermal expansion self-reinforcing seal: The first and third seals are made of graphite carbon ring material. After high-speed rotation and friction, they automatically expand and fill the sealing gap. The higher the rotation speed, the better the sealing effect, completely solving the pain point of "gap leakage" in traditional seals. 3. Significantly extended sealing life: Particles are isolated by the first packing layer, avoiding wear on the sealing surfaces of the oil seal and carbon ring. The service life of the sealing components is extended from the current 300-600 hours to more than 1500 hours, and the maintenance frequency is reduced by 60%.

[0019] (iv) It has broad hybrid adaptability and takes into account the needs of multiple scenarios. 1. Adaptable to multiple material types: Through the strong vortex flow field driven by dual motors in opposite directions and the optimized impeller structure, it can adapt to the mixing of various materials such as liquid-liquid, liquid-containing particles (particle diameter ≤2mm), and high viscosity (within the normal viscosity range), without the need to replace the core components; 2. Centrifugal force enhances mixing effect: The auxiliary blades on the inner wall of the shell increase the centrifugal force of rotation, which effectively avoids stratification and sedimentation for high-density particulate materials or high-viscosity materials, and ensures uniform mixing. 3. Flexible and convenient operation: Dual motors with independent speed regulation allow for precise adjustment of the impeller and casing speeds according to material characteristics. The casing inlet is equipped with a sealing cover, and the outlet position can be adjusted by rotating the casing to meet the needs of closed mixing and convenient discharge.

[0020] (v) Reduced overall usage costs 1. Reduced maintenance costs: Extended service life of sealing components and bearings reduces the frequency of replacing vulnerable parts; simple structural design facilitates disassembly and assembly, reducing maintenance time by 50%; 2. Energy consumption optimization: The reverse-drive relative speed increase design reduces energy consumption by 15%-20% compared to traditional single high-speed impeller mixers; the "coarse at the bottom and fine at the top" structure of the impeller further reduces stirring resistance, achieving energy-saving operation; 3. Environmental protection and safety: Zero leakage sealing avoids material pollution to the environment, and closed mixing reduces the loss of volatile materials, meeting the requirements of environmental protection and safe production. Attached Figure Description

[0021] Figure 1 This is a front view of an embodiment of a high-speed mixer.

[0022] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0023] Figure 3 This is a side view of an embodiment of a high-speed mixer.

[0024] Figure 4 This is a top view of an embodiment of a high-speed mixer.

[0025] Among them, 1-shell; 11-material inlet; 12-discharge outlet; 13-support hollow journal; 15-impeller shaft special bearing; 16-auxiliary blade; 17-shell drive pulley; 2-impeller shaft; 21-impeller drive pulley; 22-straight blade; 3-motor A; 31-belt; 4-motor B; 41-belt; 5-shell bearing housing; 51-support frame; 61-graphite carbon ring packing; 62-oil seal; 63-dynamic-static ring; 71-oil tank; 72-gear pump. Detailed Implementation

[0026] The technical solution of this utility model will now be described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementation methods of this application, and not all of them; and the structures shown in the accompanying drawings are merely illustrative and do not represent a physical object. It should be noted that all other embodiments obtained by those skilled in the art based on these embodiments of this utility model are within the scope of protection of this application.

[0027] It should be noted that, in this document, the term "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical or equivalent elements in the process, method, article, or apparatus that includes said element.

[0028] The terms "upper," "lower," "inner," and "outer" do not constitute absolute spatial restrictions, but are merely concepts of relative position. This is something that anyone skilled in the art can understand.

[0029] See Figure 1-4 This embodiment provides a high-speed mixer (taking the mixing of titanium alloy powder and alcohol as an example). Through dual-motor reverse drive, synergistic mixing structure, and triple-combination sealing design, it achieves high-speed linear stirring at the blade tip and zero-leakage sealing, meeting the precision mixing requirements in the field of new material preparation. The following details the components, connections, working process, and performance verification.

[0030] The following is a description of each component: (a) Shell (outer rotating cylinder) Material and Specifications: The circular rotating cylinder is integrally forged and machined from 316L stainless steel. It has a material inlet 11 at the top and a pre-reserved discharge port 12 at the bottom (distributed at 180° to the material inlet 11). The middle section of the shell 1 is integrally formed with double-sided hollow support journals 13. The inner wall of the support hollow support journals 13 is machined with annular bearing mounting grooves (one on each side) 30mm away from the material end, and contains a special bearing 15 for the impeller shaft.

[0031] Key auxiliary structures: Three sets of auxiliary blades 16 (2-3 blades per set, with the auxiliary blades 16 in the same set evenly distributed around the inner wall of the shell 1 at the same height) are uniformly welded along the axial direction on the inner wall of the shell 1. The auxiliary blades 16 can be straight or columnar, and are staggered from the subsequent straight blades 22 (with no interference gap ≥20mm).

[0032] Connection relationships: One side (left side in the figure) supports the hollow journal 13 and is fixedly connected to the housing drive pulley 17 (by means of expansion sleeve or welding). The housing drive pulley 17 is connected to the output shaft of motor B4 via belt 41. The double-sided hollow journal 13 is connected to the housing bearing seat 5 for easy rotation: the outer wall of the double-sided hollow journal 13 is interference-fitted with the inner ring of the housing bearing, and the outer ring of the housing bearing is interference-fitted with the housing bearing seat 5; the housing bearing seat 5 is fixed to the support frame 51 by bolts, and the bottom of the support frame 51 is fixed to the ground by expansion bolts; Material inlet 11 and outlet 12 are equipped with 304 stainless steel sealing covers, which are fixed to the flange of housing 1 by bolts, and rubber sealing rings are embedded inside the sealing covers.

[0033] (ii) Impeller shaft and impeller assembly Impeller shaft 2: Made of 316L stainless steel, with a flat keyway on the right end; the impeller shaft 2 passes through the interior of the housing 1, with both ends penetrating the hollow cavity supporting the hollow journal 13, and is interference-fitted with the inner ring of the impeller shaft special bearing 15, and the outer ring of the impeller shaft special bearing 15 is interference-fitted with the annular bearing mounting groove on the inner wall of the supporting hollow journal 13; the right end with the keyway extends out of the supporting hollow journal 13 and is fixed to the impeller drive pulley 21 by a flat key.

[0034] Impeller: It is integrally welded to the impeller shaft 2 and is made of 316L stainless steel. There are 3 sets of impellers distributed at equal intervals along the axial direction (staggered from the auxiliary blades 16). Each set contains 3-6 straight plate blades 22 (wide at the root and narrow at the top). The surface of the straight plate blades 22 is coated with YG6 or YG8 tungsten carbide coating. The overall dynamic balance accuracy reaches 5mg.

[0035] Connection relationship: The root of the straight plate blade 22 is fully welded to the impeller shaft 2. Each group of straight plate blades 22 is evenly distributed around the circumference of the impeller shaft 2 (the included angle between adjacent blades is 120°). The gap between the top of the straight plate blade 22 and the inner wall of the shell 1 is controlled at 15mm. The impeller drive pulley 21 is connected to the motor A3 through the belt 31.

[0036] (III) Dual-motor reverse drive system Motor A3 (impeller drive motor): adopts a common frequency conversion motor with a power of 5.5kW; the impeller drive pulley 21 is connected to the motor A3 via belt 31 (as a group with motor A3).

[0037] Motor B4 (housing drive motor): adopts permanent magnet variable frequency motor; housing drive pulley 17 is connected to the output shaft of motor B4 via belt 41 (as a group with motor B4).

[0038] (iv) Triple combination sealing system (one set on each side) Installation location: between the inner wall of the hollow support journal 13 and the outer wall of the impeller shaft 2, arranged sequentially along the axial direction from the material end to the external environment.

[0039] Graphite carbon ring packing 61 (first seal): There are three seals in total. The inner diameter of the graphite carbon ring packing 61 fits against the outer wall of the impeller shaft 2 (fitting clearance ≤ 0.05mm), and the outer diameter fits against the inner wall of the supporting hollow journal 13. It is fixed to the supporting hollow journal 13 by the packing gland.

[0040] Oil seal 62 (second seal): imported wear-resistant type, using Teflon stainless steel oil seal; the lip of oil seal 62 faces the graphite carbon ring packing 61, and the clearance between it and the outer wall of impeller shaft 2 is ≤0.02mm.

[0041] Dynamic-static ring 63 (third seal): Both the dynamic and static rings are made of graphite carbon rings. The dynamic ring is interference-fitted with the impeller shaft 2 (fit clearance ≤ 0.01mm) and rotates synchronously with the impeller shaft 2. The static ring is fixed to the inner wall of the supporting hollow journal 13 by a stainless steel fixing seat, which restricts the rotation of the static ring. There is no gap between the mating surfaces of the dynamic and static rings.

[0042] (v) Fuel tank supply system The oil tank 71 is fixed to the side of the frame and is equipped with a level gauge and a filling port. The lubricating oil is delivered to the oil circuit interface between the housing bearing seat 5 and the supporting hollow journal 13 through the gear pump 72 and the oil pipe. The return oil flows back to the oil tank through the bottom oil pipe to form a circulation. The gear pump 72 is connected to the motor to realize automatic oil supply.

[0043] Working process (taking the mixing of titanium alloy powder and alcohol as an example) (a) Preparation stage Check equipment status: Confirm that the lubricating oil level of each bearing is normal, the sealing system is not loose, and there is no interference between the impeller and the housing 1 (manually rotate the impeller shaft 2 and the housing 1, and there is no jamming). Adding materials: Open the sealing cover of the material inlet 11 at the top of the shell 1, inject titanium alloy powder and alcohol according to the preset mass ratio, close the sealing cover and tighten the bolts to ensure that the sealing ring inside the sealing cover is pressed tightly.

[0044] (ii) Mixed Stage Start the lubrication system: Turn on the gear pump motor of the oil tank, and the lubricating oil will be circulated to the two sets of bearings. After running for 5 minutes, confirm that the bearing oil supply pressure is stable. Start the dual drive motors: First, start motor B4 (casing drive motor), and gradually increase the speed from low to 40 rpm (counterclockwise rotation) through the frequency converter, which drives the casing 1 and the auxiliary blades 16 on the inner wall to rotate, generating centrifugal force to prevent material sedimentation; Restart motor A3 (impeller drive motor), and gradually increase the speed from low to 200 rpm through frequency converter. Driven by belt 31, the impeller shaft 2 rotates at high speed (clockwise). The three sets of straight plate blades 22 of the impeller stir the material at high speed. Synergistic mixing: The impeller and the shell 1 rotate in opposite directions to form a relative speed superposition, and the blade tip linear velocity reaches 250m / s, forming a strong vortex flow field. The auxiliary blades 16 on the inner wall of the shell 1 further enhance the material flow, avoid stratification, and achieve uniform mixing. Sealing guarantee: During the mixing process, the high-speed rotation of the impeller shaft 2 causes the graphite carbon ring packing 61 to rub against the dynamic-static ring 63 and generate heat (the temperature rises to 50-60℃). The carbon ring expands radially and automatically fills the sealing gap; the oil seal 62 intercepts the trace amount of media that may leak. The triple seal (two thermal expansions + one redundant protection) works together to achieve zero leakage.

[0045] (III) Discharge Stage Mixing complete: After stirring continuously for 30 minutes, first turn off motor A3, and after impeller shaft 2 has completely stopped rotating, turn off motor B4; Adjust the discharge position: Start motor B4, which will electrically control the housing 1 to rotate, turning the bottom discharge port 12 to the bottom; Discharge: Open the discharge port 12 valve, and the material will be discharged under gravity. After discharge, close the valve and clean the material in the material inlet 11 and discharge port 12.

[0046] 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 principles of this 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 high-speed mixer, characterized in that, include: The housing has a material inlet, and the middle section of the housing is integrally formed with a double-sided hollow support journal, which is used to adapt to the rotation support and sealing installation of the housing; The drive assembly includes two motors and two pulleys. The two motors are motor A, which drives the impeller shaft, and motor B, which drives the housing. The two pulleys are impeller drive pulley and housing drive pulley. One end of the impeller drive pulley is connected to the output shaft of motor A, and the other end is fixedly connected to the impeller shaft. One end of the housing drive pulley is connected to the output shaft of motor B, and the other end is fixedly connected to a hollow journal supporting one side. The stirring assembly includes an impeller shaft and an impeller. The impeller shaft extends transversely through the interior of the housing, with both ends passing through a hollow cavity supported by hollow journals on both sides. The impeller shaft is installed in conjunction with the supporting hollow journals via bearings. The impeller is fixed to the impeller shaft and rotates synchronously with the impeller shaft. The triple combination seal is located between the inner wall of the supporting hollow journal and the outer wall of the impeller shaft, with one set installed in each of the two supporting hollow journals. The triple combination seal includes, along the axial direction from the material end to the external environment, a graphite carbon ring packing seal, a wear-resistant oil seal, and a double carbon ring dynamic-static ring seal.

2. The high-speed mixer according to claim 1, characterized in that, The motors A and B rotate in opposite directions. Motor A drives the impeller shaft to rotate at high speed, while motor B drives the housing to rotate at low speed, resulting in a superposition of relative speeds.

3. The high-speed mixer according to claim 1, characterized in that, The inner wall of the housing is provided with auxiliary blades, which are evenly distributed along the circumference of the inner wall of the housing and are staggered from the impeller blades.

4. The high-speed mixer according to claim 1, characterized in that, The impeller includes multiple sets of blades evenly spaced along the impeller shaft axis. Each set of blades contains multiple straight plate-shaped blades evenly distributed around the circumference of the impeller shaft, and the blades are thicker at the bottom and thinner at the top.

5. The high-speed mixer according to claim 4, characterized in that, The blade surface is coated with a tungsten carbide coating.

6. The high-speed mixer according to claim 1, characterized in that, The material inlet of the shell is equipped with a sealing cover, and a sealing ring is embedded inside the sealing cover to form a closed mixing environment.

7. The high-speed mixer according to claim 1, characterized in that, The graphite carbon ring packing seal comprises three graphite carbon ring packings.

8. The high-speed mixer according to claim 1, characterized in that, The outer side of the supporting hollow journal is fitted with a fixed housing bearing seat, and a bearing is installed inside the housing bearing seat; the inner wall of the supporting hollow journal is provided with an annular bearing mounting groove, and a bearing that mates with the impeller shaft is installed inside the annular bearing mounting groove.

9. The high-speed mixer according to claim 1, characterized in that, It also includes an oil tank supply system, which includes an oil tank, a gear pump and oil pipes. The oil pipes are respectively connected to the housing bearing seat and the oil passage interface supporting the hollow journal to form a lubricating oil circulation.

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