Micro-fluid shear type hydraulic oil mixing homogenizer

Abstract

The utility model discloses a kind of microfluidic shear type hydraulic oil mixing homogenizer, and it is related to hydraulic oil post-processing technical field.The shear of existing hydraulic oil stirring or stator emulsification equipment is insufficient, and particle size is difficult to control in submicron, and sealing wears fast, it is difficult to meet the cleanliness requirement of high-end hydraulic system.The microfluidic shear type hydraulic oil mixing homogenizer adopts plunger booster pump to form 180 ° Y type counter jet by 50-300 μm spray hole to oil liquid, utilize instantaneous high shear, impact and cavitation collaborative refinement particle and synchronous dehydration degassing;Outlet series heat exchanger cooling, qualified oil is discharged from discharge port, and substandard oil is recycled by return pipe processing.The whole machine is connected by high-pressure pipeline by frame, feed tank, booster pump, high-pressure back pressure valve, pulsation damper, Y type counter chamber, microfluidic tank, heat exchanger and finished product tank etc.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic oil post-treatment technology, specifically a micro-jet shearing hydraulic oil mixing and homogenizing machine. Background Technology

[0002] Currently, hydraulic systems are widely used in engineering machinery, metallurgical equipment, and wind turbines. To ensure the reliability of precision valve assemblies and actuators, hydraulic oil often needs to undergo dehydration, degassing, and additive uniform dispersion treatment before or during operation. Commonly used processing equipment includes low-speed mixing tanks, high-speed dispersers, and traditional high-shear emulsifiers. These devices use paddles or stator-rotor structures to forcibly agitate the liquid, achieving mixing of base oil and various functional additives. An existing ultra-high flow rate high-pressure micro-jet homogenizer (publication number: CN212283601U) has the following drawbacks and requires further improvement.

[0003] Low-speed mixing tanks rely on macroscopic eddies to drive liquid circulation. They have low local shear rates and are prone to stratification when dealing with hydraulic oils with high viscosity or containing solid particles. They also have insufficient efficiency in emulsification, water droplet breakup, and bubble dispersal, which cannot meet the requirements of high-end hydraulic systems for particle size, micro-water content, or dispersion of nano-scale additives.

[0004] While traditional high-speed dispersers and stator-rotor high-shear emulsifiers can improve local shear rates, their mechanical seals are easily worn by high-pressure oil, requiring frequent maintenance. Meanwhile, the stator-rotor gap is usually 0.2-0.5mm, which is still insufficient to reduce agglomerated particles in the oil to submicron or even nanometer scale. Furthermore, the energy consumption increases significantly after the equipment is scaled up, and the cavitation and pulsation noise are high, limiting the application of continuous online circulation processing and on-site mobile operations. Utility Model Content

[0005] The main purpose of this invention is to provide a micro-jet shearing hydraulic oil mixing homogenizer, which can effectively solve the problems in the background art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a micro-jet shearing hydraulic oil mixing homogenizer, wherein a feed tank is vertically fixed on the left side of the main body, an inlet is provided at the top of the feed tank, the bottom of the feed tank is connected to the suction port of a booster pump installed in the lower middle part of the main body via a conveying pipe, the outlet of the booster pump is connected to a high-pressure back pressure valve via a conveying pipe, the bottom of the high-pressure back pressure valve is connected to a Y-shaped collision chamber at the bottom via a conveying pipe, micro-spray holes are symmetrically arranged in the Y-shaped collision chamber, the outlet of the Y-shaped collision chamber is connected to a micro-jet tank via a conveying pipe, the micro-jet tank is connected to a finished oil tank via a conveying pipe, the finished oil tank is connected to two sets of conveying pipes, one end of which is connected to the outlet and the other end of which is connected to the return pipe, the other end of which is connected to the feed tank, and a pressure sensor is connected to the bottom of the micro-spray hole.

[0007] Preferably, the Y-shaped collision cavity is composed of two collision channels with a center line angle of 180°. Each collision channel is provided with micro-spray holes with a diameter of 50-300μm. The collision channels are connected to the delivery pipe through a rounded transition section.

[0008] Preferably, the Y-shaped collision chamber and the delivery pipe are detachably connected by upper and lower quick-release clamping blocks. The upper and lower clamping blocks are fastened by four M8×40 hexagon socket bolts, and the inner side of the clamping blocks is sealed with fluororubber O-rings.

[0009] Preferably, the high-pressure back pressure valve is an adjustable needle valve structure, the valve body is connected to the delivery pipe through a DN6 tapered thread, and the valve body shell is equipped with a 0-300MPa scale indication and a locking nut.

[0010] Preferably, the pressure sensor is mounted at the center of the bottom of the Y-shaped collision chamber via an M14×1.5 external thread.

[0011] Preferably, the top of the finished oil tank is equipped with a breather valve with a desiccant, the side wall is equipped with a quick-release sampling valve, and the bottom of the finished oil tank is fixed to the main body by welding three support legs.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This invention employs micro-jet collision shearing technology, which can refine agglomerated particles, water droplets, and microbubbles in hydraulic oil to 0.05–0.2 μm in a single pass. It also utilizes cavitation decompression after the collision zone to simultaneously dehydrate and degas. Compared with low-speed mixing tanks that rely on macroscopic eddies, it significantly improves the shearing rate and circulation efficiency, avoiding problems such as stratification, incomplete emulsification, and excessive particle size caused by insufficient shearing. This meets the stringent requirements of high-end hydraulic systems for cleanliness and additive dispersion.

[0014] The core components of this invention are a detachable diamond-coated micro-spraying chip and a quick-release clamping block. It eliminates the need for rotary seals and high-speed bearings, resulting in reduced energy consumption, fewer wear points, and longer maintenance cycles. The matching shell-and-tube heat exchanger can provide instant cooling, and the bottom backflushing valve allows for online slag removal and cleaning. This solves the problems of traditional equipment, such as easy wear of seals, high energy consumption, frequent shutdowns for maintenance, and difficulty in long-term stable operation. Attached Figure Description

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

[0016] Fig. 2 This is a side view of the overall structure of this utility model;

[0017] Fig. 3 This is an enlarged view of part A of this utility model.

[0018] In the diagram: 1. Main body; 2. Feed tank; 3. Inlet; 4. Conveying pipe; 5. Booster pump; 6. High-pressure back pressure valve; 7. Y-shaped collision chamber; 8. Micro-jet tank; 9. Finished oil tank; 10. Outlet; 11. Return pipe; 12. Micro-spray hole; 13. Pressure sensor. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example

[0023] Please see Figs. 1-3 This utility model provides a technical solution:

[0024] A micro-jet shearing hydraulic oil mixing homogenizer includes a feed tank 2 vertically fixed on the left side of the main body 1. The top of the feed tank 2 has an inlet 3. The bottom of the feed tank 2 is connected to the suction port of a booster pump 5 installed in the lower part of the main body 1 via a conveying pipe 4. The outlet of the booster pump 5 is connected to a high-pressure back pressure valve 6 via the conveying pipe 4. The bottom of the high-pressure back pressure valve 6 is connected to a Y-shaped collision chamber 7 at the bottom via the conveying pipe 4. The Y-shaped collision chamber 7 has symmetrically arranged micro-spray holes 12. The outlet of the Y-shaped collision chamber 7 is connected to a micro-jet tank 8 via the conveying pipe 4. The micro-jet tank 8 is connected to a finished oil tank 9 via the conveying pipe 4. The finished oil tank 9 is connected to two sets of conveying pipes 4, one end connected to an outlet 10 and the other end connected to a return pipe 11. The other end of the return pipe 11 is connected to the feed tank 2. A pressure sensor 13 is connected to the bottom of the micro-spray holes 12.

[0025] Furthermore, the Y-shaped collision cavity 7 is composed of two collision channels with a center line angle of 180°. Each collision channel is provided with micro-spray holes 12 with a diameter of 50-300μm. The collision channels are connected to the delivery pipe 4 through a rounded transition section.

[0026] Furthermore, the Y-shaped collision chamber 7 and the delivery pipe 4 are detachably connected by upper and lower quick-release clamping blocks. The upper and lower clamping blocks are fastened by four M8×40 hexagonal socket bolts, and the inner side of the clamping blocks is sealed with fluororubber O-rings.

[0027] Furthermore, the high-pressure back pressure valve 6 is an adjustable needle valve structure. The valve body is connected to the delivery pipe 4 through a DN6 tapered thread. The valve body shell is equipped with a 0-300MPa scale indicator and a locking nut.

[0028] Furthermore, the pressure sensor 13 is mounted at the center of the bottom of the Y-shaped collision chamber 7 via an M14×1.5 external thread.

[0029] Furthermore, the top of the finished oil tank 9 is equipped with a breather valve with a desiccant, and the side wall is equipped with a quick-release sampling valve. The bottom of the finished oil tank 9 is fixed to the main body 1 by welding three support legs.

[0030] The homogenizer in this embodiment, as shown in the figure, includes a frame or base, on which a raw material storage tank and a high-pressure feeding assembly are mounted. The raw material storage tank holds the hydraulic oil and additives to be mixed and is connected to the inlet of the high-pressure pump via a pipeline. The high-pressure pump is a plunger booster pump, driven by a motor and fixed to the frame via a coupling. The motor and high-pressure pump are securely mounted with several bolts, and the pump outlet is connected to the feed inlet of the Y-shaped collision homogenizing chamber via a high-pressure resistant pipeline. The pipeline can be a high-pressure steel pipe or a metal hose, sealed to the pump outlet and the homogenizing chamber feed inlet via tapered thread joints or flanges to withstand working pressures of tens of megapascals or higher. Preferably, a pressure gauge and a safety valve are installed on the pipeline to monitor the discharge pressure and to release pressure in case of overpressure to ensure safety. The Y-shaped collision homogenizing chamber is fixedly mounted on the frame near the high-pressure pump outlet and can be secured by brackets and U-shaped clamps, facilitating quick disassembly. The outlet of the homogenizing chamber is connected to the finished product outlet or the return pipeline via an outlet pipe. A valve can be installed on the outlet pipe to control whether the material flows to the finished product container or returns to the raw material storage tank for recycling. When multiple homogenizations are required, the valve on the return pipeline can be opened to return the material to the storage tank for recycling. When a single homogenization is completed or reaches the desired effect, the return pipeline is closed, and the homogenized hydraulic oil product is sent to the finished product tank through the outlet. The relative positions and connections of the above components are shown in the figure. The raw material storage tank is usually higher than the high-pressure pump for gravity feeding. The high-pressure pump is close to the Y-type homogenizing chamber to shorten the high-pressure pipeline length. All pipe joints use pressure-resistant sealing structures to ensure no leakage under high pressure.

[0031] As shown in the figure, the Y-shaped collision homogenizing chamber is the core component of this machine, mainly composed of a chamber shell and internal micro-jet collision channels. The chamber includes an upper shell and a lower shell that mesh with each other, and are fixed together by bolts or quick-release clamps. Pressure-resistant sealing gaskets are provided at the joint surfaces to ensure no leakage under high pressure. The upper shell has an inlet channel connected to the outlet of the high-pressure pump, and the lower shell has an outlet channel. The interior of the chamber is machined with Y-shaped collision channels, for example, a Y-shaped structure consisting of two relatively inclined micro-jet channels and an outlet channel that merges with them. Specifically, after entering the homogenizing chamber, the inlet channel splits into two symmetrically arranged micro-channels. These two micro-channels extend along the two branches of the Y-shape and are inclined towards each other at a certain angle. The diameter of the micro-channels is very small, and their ends form micro-nozzle orifices pointing towards the collision area O in the center of the chamber. If needed, these nozzles can be inserted into the shell as independent nozzle components and fixed by threads or flange caps, facilitating the replacement of nozzles with different orifice diameters. Preferably, the nozzle orifice material is made of a high-hardness, wear-resistant material, such as synthetic diamond, sapphire, or cemented carbide, to withstand the scouring and high-pressure impact of the high-speed jet without easily wearing out. The central axes of the two branch micro-jet orifices intersect at the theoretical collision point O inside the cavity and are connected to the outlet channel located at the bottom of the Y-shape. In this way, the jets from the two nozzles will collide head-on in the collision point area and then enter the outlet channel together. To control the temperature of the liquid inside the cavity, a cooling jacket can be fitted on the outside of the homogenization cavity to remove the heat generated during the homogenization process by circulating cooling water, thus preventing the liquid from overheating; or temperature sensors and heat exchangers can be installed at the inlet and outlet of the cavity to achieve temperature regulation during the homogenization process.

[0032] The working process of this homogenizer is as follows: First, add the hydraulic oil and additive raw materials to be mixed to the raw material storage tank. Pre-mixing can be achieved by turning on a low-speed agitator or circulating pipeline. Start the high-pressure plunger pump and gradually increase the pressure. When the pump outlet pressure reaches the preset value, the high-pressure hydraulic oil is forced into the feed channel of the Y-shaped homogenizing chamber through the pipeline. After entering the chamber, the liquid is diverted into two micro-jet channels, forming two high-speed jets under high pressure. Due to the very small diameter of the micro-jet holes, the high-pressure fluid experiences a drastic pressure drop and is accelerated to extremely high speeds, reaching hundreds of meters per second. The two supersonic jets collide head-on in the central collision area O of the chamber, instantly releasing enormous energy. During this process, the fluid is subjected to a combination of ultra-high shear force, collision impact force, and cavitation effect caused by the rapid pressure drop, which powerfully shears and breaks down the additive particles and droplets in the hydraulic oil into finer particles, uniformly dispersing them in the continuous phase oil, achieving a thorough mixing and homogenization effect. The emulsion formed after the collision merges and enters the outlet channel, flowing out from the discharge port of the homogenization chamber and into the subsequent container via the discharge pipe. If multiple cycles of homogenization are required, the discharged material can be returned to the raw material storage tank through the return pipeline, and then pumped back in by the high-pressure pump to repeat the above process until a homogenized hydraulic oil product meeting the requirements is obtained. Then, the valve is switched to output the final product to the finished product container. The entire homogenization process can be carried out continuously in a closed loop or in batches with multiple cycles. Because this equipment utilizes the unique shearing principle of Y-shaped double-jet collision, the material is subjected to strong collision and shearing action in a single pass, thereby significantly reducing particle size and ensuring thorough mixing of components. Compared to traditional high-pressure homogenizers that require multi-stage valves and impact rings, the Y-shaped collision chamber structure of this machine is simpler and more efficient, achieving good homogenization results with a single collision. For hydraulic oil systems with high viscosity or requiring particularly fine particle sizes, the homogenization effect can be further improved by increasing the number of cycles or increasing the working pressure.

[0033] The design and material selection of each component of the device described in this embodiment meet the requirements of the high-pressure homogenization process, ensuring the feasibility and reliability of the technology. For example, the main body of the homogenization chamber and related pressure-bearing components are preferably precision-machined from high-pressure resistant stainless steel, capable of withstanding ultra-high-pressure impacts within the chamber; its internal microchannels can be fabricated into a high-precision Y-shaped flow channel structure through electrical discharge machining or laser micromachining. The sealing ring material at the chamber mating surface can be a polytetrafluoroethylene-reinforced gasket or a metal ring gasket, capable of withstanding pressures up to hundreds of megapascals without leakage. The high-pressure plunger pump is a mature commercial component that can provide stable pressures of at least tens of megapascals or even hundreds of megapascals; for example, a hydraulically boosted plunger pump can achieve a working pressure of approximately 200 MPa, thereby allowing the microjet to be ejected at a higher velocity. Experiments have verified that, within a typical operating pressure range of 40–100 MPa, the jet velocity within the homogenization chamber of this machine can exceed 300–500 m / s, exhibiting significant impact shearing effects. Generally, a nozzle diameter of approximately 0.1 mm and an included angle between the axes of the two jet channels of 60°–120° are chosen to balance high impact strength and chamber life. For applications requiring particularly high energy density, a structure with two jets colliding directly at 180° can be designed, but the Y-shaped design with a certain inclination angle reduces wear on the chamber walls from direct jet impact. During prolonged continuous operation, high-pressure impacts can cause the liquid temperature to rise. Therefore, this machine uses the aforementioned cooling jacket or a heat exchanger at the discharge end to control the liquid temperature. If necessary, heating or cooling devices can be added to the raw material storage tank to maintain the hydraulic oil within a suitable process temperature range. All connecting pipes and valves are selected according to standard pressure-resistant components and are equipped with vibration-damping supports and fastening measures. The entire assembly adopts a modular design for easy disassembly and maintenance. For example, the Y-shaped homogenizing chamber is fixed to the frame by a quick-release clamp, allowing operators to quickly disassemble the chamber without special tools to inspect or replace the internal microchannel blocks and seals, ensuring that equipment maintenance is simple and "fully transparent".

[0034] 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 illustrative of the 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 claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A micro-jet shearing hydraulic oil mixing homogenizer, comprising a main body (1), a Y-shaped collision chamber (7), and a micro-jet tank (8), characterized in that: A feed tank (2) is vertically fixed on the left side of the main body (1). The feed tank (2) has an inlet (3) at the top. The bottom of the feed tank (2) is connected to the suction port of a booster pump (5) installed in the lower part of the main body (1) via a conveying pipe (4). The outlet of the booster pump (5) is connected to a high-pressure back pressure valve (6) via the conveying pipe (4). The bottom of the high-pressure back pressure valve (6) is connected to a Y-shaped collision chamber (7) at the bottom via the conveying pipe (4). The Y-shaped collision chamber (7) is symmetrically provided with micro-spray holes (12). The outlet of the Y-shaped collision chamber (7) is connected to the micro-jet tank (8) via the conveying pipe (4). The micro-jet tank (8) is connected to the finished oil tank (9) via the conveying pipe (4). The finished oil tank (9) is connected to two sets of conveying pipes (4), one end of which is connected to the outlet (10) and the other end of which is connected to the return pipe (11). The other end of the return pipe (11) is connected to the feed tank (2). The bottom of the micro-spray hole (12) is connected to the pressure sensor (13).

2. The micro-jet shearing hydraulic oil mixing homogenizer according to claim 1, characterized in that: The Y-shaped collision chamber (7) is composed of two collision channels with a center line angle of 180°. Each collision channel is provided with micro-spray holes (12) with a diameter of 50-300μm. The collision channels are connected to the delivery pipe (4) through a rounded transition section.

3. The micro-jet shearing hydraulic oil mixing homogenizer according to claim 1, characterized in that: The Y-shaped collision chamber (7) and the delivery pipe (4) are detachably connected by upper and lower quick-release clamps. The upper and lower clamps are fastened by four M8×40 hexagonal socket bolts, and the inner side of the clamps is sealed with fluororubber O-rings.

4. The micro-jet shearing hydraulic oil mixing homogenizer according to claim 1, characterized in that: The high-pressure back pressure valve (6) is an adjustable needle valve structure. The valve body is connected to the delivery pipe (4) through a DN6 tapered thread. The valve body shell is equipped with a 0-300MPa scale indication and a locking nut.

5. A micro-jet shearing hydraulic oil mixing homogenizer according to claim 1, characterized in that: The pressure sensor (13) is installed at the bottom center of the Y-shaped collision chamber (7) via an M14×1.5 external thread.

6. The micro-jet shearing hydraulic oil mixing homogenizer according to claim 1, characterized in that: The top of the finished oil tank (9) is equipped with a breather valve with desiccant, and the side wall is equipped with a quick-release sampling valve. The bottom of the finished oil tank (9) is fixed to the main body (1) by welding three legs.

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