A bubble generating device and a cutting machine

Abstract

The utility model relates to machining technical field discloses a kind of bubble generating device and cutting machine tool, bubble generating device includes rack, bubble generating pipe, circulating conveying mechanism and stirring impeller, wherein circulating conveying mechanism is used to circulate and convey cutting fluid between bubble generating pipe and liquid storage tank;Stirring impeller is arranged in liquid storage tank.The utility model bubble generating device inner diameter tapering in booster chamber makes cutting fluid pressurization spray, forms negative pressure suction air in gas production cavity and mixes into bubble.The core lies in multistage refinement structure: gas production cavity rear end screen can further stimulate and refine bubble when cutting fluid flows;Cutting fluid refined by screen is backflowed to liquid storage tank by circulating conveying mechanism, shear force is generated when tank stirring impeller rotates, and secondary refinement is carried out to bubble and is fully mixed with cutting fluid in tank;Through the sustained effect of circulating conveying mechanism, cutting fluid circulates multiple times between bubble generating pipe and liquid storage tank, and multistage refinement and stability improvement of bubble are realized.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a bubble generating device and a cutting machine tool. Background Technology

[0002] In the field of machining, the cooling performance of cutting fluid directly affects tool durability and workpiece machining quality. Although introducing air bubbles into the cutting fluid can achieve tool cooling through the thermal effect of bubble collapse, existing bubble generation systems produce large-sized bubbles, resulting in insufficient stability and poor uniform dispersion of the bubbles in the cutting fluid, thus affecting the cooling effect. Utility Model Content

[0003] The present invention aims to improve at least one technical problem in the prior art.

[0004] This utility model provides a bubble generating device, comprising: frame; A liquid storage tank is mounted on the frame and is used to store cutting fluid. A bubble generating tube is mounted on the frame. The bubble generating tube contains a pressurizing chamber and a gas generating chamber. The pressurizing chamber has a liquid inlet at its front end and a first liquid outlet at its rear end. The inner diameter of the pressurizing chamber gradually decreases from front to back. The pressurizing chamber and the gas generating chamber are connected through the first liquid outlet. The inner diameter of the gas generating chamber is larger than the maximum inner diameter of the pressurizing chamber. An air inlet channel is provided on the wall of the gas generating chamber, connecting it to the outside environment. A second liquid outlet is provided at the rear end of the gas generating chamber, and a screen is provided on the second liquid outlet. A circulating conveying mechanism is mounted on the frame and is used to circulate and convey cutting fluid between the bubble generating pipe and the storage tank. A stirring impeller is disposed inside the liquid storage tank.

[0005] The beneficial effects of this invention are as follows: In the bubble generating device of this invention, the inner diameter of the pressurizing chamber gradually narrows, causing the cutting fluid to be pressurized and ejected. A negative pressure is formed in the gas generating chamber, drawing in air and mixing it into bubbles. The core lies in the multi-stage refinement structure: the screen at the rear end of the gas generating chamber can further stimulate and refine the bubbles as the cutting fluid flows through it; the cutting fluid refined by the screen flows back to the storage tank through the circulation conveying mechanism. When the stirring impeller rotates in the tank, it generates shear force, which further refines the bubbles and fully mixes them with the cutting fluid in the tank; through the continuous action of the circulation conveying mechanism, the cutting fluid circulates multiple times between the bubble generating tube and the storage tank, achieving multi-stage refinement and improved stability of the bubbles.

[0006] As a further improvement to the above technical solution, the aperture range of the screen is 30μm-1mm.

[0007] As a further improvement to the above technical solution, the screen is detachably mounted on the second liquid outlet by means of threads or snaps.

[0008] As a further improvement to the above technical solution, the front end of the booster chamber extends into the gas production chamber, and the outer diameter of the booster chamber extending into the gas production chamber gradually decreases along the extension direction, and the air intake channel is opposite to the outer wall of the booster chamber extending into the gas production chamber.

[0009] As a further improvement to the above technical solution, the circulating conveying mechanism includes a first pipe and a second pipe. One end of the first pipe is connected to the second liquid outlet, and the other end of the first pipe is connected to the liquid storage tank. One end of the second pipe is connected to the liquid storage tank, and the other end of the second pipe is connected to the liquid inlet. A power device is provided on the second pipe, and the power device is used to transport the cutting fluid in the liquid storage tank to the second pipe.

[0010] As a further improvement to the above technical solution, the power unit is a centrifugal pump.

[0011] As a further improvement to the above technical solution, a flow meter is provided on the second pipeline.

[0012] As a further improvement to the above technical solution, the stirring impeller is located at the bottom or side wall of the liquid storage tank.

[0013] As a further improvement to the above technical solution, the stirring impeller is driven to rotate by a drive motor.

[0014] This utility model also provides a cutting machine tool including the above-mentioned bubble generating device.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a bubble generating device according to one embodiment; Figure 2 This is a cross-sectional view of a bubble generating tube according to one embodiment.

[0017] In the attached diagram: 100 - liquid storage tank; 200 - bubble generating pipe; 210 - pressurization chamber; 211 - liquid inlet; 212 - first liquid outlet; 220 - gas generating chamber; 221 - second liquid outlet; 230 - air inlet channel; 240 - screen; 310 - first pipe; 320 - second pipe; 321 - centrifugal pump; 322 - flow meter; 400 - stirring impeller. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are 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.

[0020] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0021] The following is combined with Figures 1 to 2 The embodiments of this utility model are described below.

[0022] This utility model embodiment provides a bubble generating device, including: frame; A liquid storage tank 100 is disposed on the frame and is used to store cutting fluid. A bubble generating tube 200 is mounted on the frame. The bubble generating tube 200 contains a pressurizing chamber 210 and a gas generating chamber 220. The pressurizing chamber 210 has a liquid inlet 211 at its front end and a first liquid outlet 212 at its rear end. The inner diameter of the pressurizing chamber 210 gradually decreases from front to back. The pressurizing chamber 210 and the gas generating chamber 220 are connected through the first liquid outlet 212. The inner diameter of the gas generating chamber 220 is larger than the maximum inner diameter of the pressurizing chamber 210. An air inlet channel 230 is provided on the wall of the gas generating chamber 220, connecting it to the outside environment. A second liquid outlet 221 is provided at the rear end of the gas generating chamber 220, and a screen 240 is provided on the second liquid outlet 221. A circulating conveying mechanism is provided on the frame and is used to circulate and convey cutting fluid between the bubble generating pipe 200 and the liquid storage tank 100. A stirring impeller 400 is disposed inside the liquid storage tank 100.

[0023] In the bubble generating device provided in this embodiment, the inner diameter of the pressurization chamber 210 of the bubble generating pipe 200 gradually decreases from front to back. The cutting fluid enters from the inlet 211. As it flows through the pressurization chamber 210, the pressure of the cutting fluid increases due to the gradually narrowing passage and it is ejected from the first outlet 212. According to the principle of fluid mechanics, a negative pressure is formed in the gas generating chamber 220, causing the near-channel to draw in outside air. The air and cutting fluid mix in the gas generating chamber 220 to form bubbles, achieving efficient air intake without additional power. Based on this, the mixed cutting fluid is discharged through the second outlet 221 at the rear end of the gas generating chamber 220. The screen 240 set on the second outlet 221 can further stimulate and refine the bubbles. The cutting fluid refined by the screen 240 is transported to the storage tank 100 through a circulation conveying mechanism. The impeller 400 inside the storage tank 100 agitates the incoming air-filled cutting fluid as it rotates, further refining the bubbles and mixing them thoroughly with the cutting fluid in the storage tank 100. Through the dual action of initial refining by the screen 240 and secondary refining by the impeller 400, multi-stage bubble refinement is achieved, improving the uniformity and fineness of the bubbles. The circulation conveying mechanism continuously circulates the cutting fluid between the bubble generating pipe 200 and the storage tank 100, allowing the mixed and refined bubble cutting fluid to flow back to the storage tank 100 and continuously participate in the circulation through the impeller 400. Combined with the repeated action of negative pressure suction in the gas generation chamber 220 and refining by the screen 240, a continuous process of "bubble generation-refining-recirculation refining" is formed, ensuring that the bubbles are continuously refined to meet the demand for long-term, high-efficiency gas production.

[0024] Furthermore, the aperture range of the screen 240 is 30μm-1mm.

[0025] In this embodiment, the bubble cutting size can be precisely controlled by limiting the aperture of the screen 240, so that the bubble can be further refined (to the micro-nano level). In this embodiment, the aperture of the screen 240 is 1mm. In other embodiments, the aperture of the screen 240 can be in the range of 30μm-1mm, such as 30μm, 50μm, 100μm, 200μm, 500μm, and 800μm.

[0026] Furthermore, the screen 240 is detachably mounted on the second liquid outlet 221 by means of threads or snaps.

[0027] This embodiment utilizes a detachable screen 240 design to facilitate regular cleaning of impurities adhering to the surface of the screen 240, preventing clogging that could affect bubble refinement and ensuring continuous and stable bubble generation. Simultaneously, improved maintenance convenience reduces equipment downtime, guaranteeing long-term reliable operation of the bubble generating device.

[0028] Furthermore, the front end of the booster chamber 210 extends into the gas production chamber 220, and the outer diameter of the booster chamber 210 extending into the gas production chamber 220 gradually decreases along the extension direction. The air intake channel 230 is opposite to the outer wall of the booster chamber 210 extending into the gas production chamber 220.

[0029] In this embodiment, the front end of the pressurizing chamber 210 extends into the gas-generating chamber 220, and the outer diameter of the extended portion gradually decreases along the extension direction. At the same time, the air intake channel 230 is positioned opposite to the outer wall of this portion of the pressurizing chamber 210, which can effectively avoid interference with the air intake process when the cutting fluid is sprayed into the gas-generating chamber 220, and prevent the cutting fluid from splashing into or blocking the air intake channel 230. The air intake channel 230 is positioned directly opposite the tapering outer wall. By utilizing the stable negative pressure area formed on the outside when the pressurizing chamber 210 sprays out, the outside air can be smoothly drawn into the gas-generating chamber 220 in a direction perpendicular to the jet flow. This ensures that the air intake channel 230 is always isolated from the mainstream of the cutting fluid, maintains the stability of the negative pressure air intake in the gas-generating chamber 220, and further improves the reliability of the bubble generation process.

[0030] Furthermore, the circulating conveying mechanism includes a first pipe 310 and a second pipe 320. One end of the first pipe 310 is connected to the second liquid outlet 221, and the other end of the first pipe 310 is connected to the liquid storage tank 100. One end of the second pipe 320 is connected to the liquid storage tank 100, and the other end of the second pipe 320 is connected to the liquid inlet 211. A power device is provided on the second pipe 320, and the power device is used to convey the cutting fluid in the liquid storage tank 100 to the second pipe 320.

[0031] In this embodiment, the circulating conveying mechanism connects the second outlet 221 of the bubble generating pipe 200 to the storage tank 100 via the first pipe 310, and the storage tank 100 is connected to the inlet 211 of the bubble generating pipe 200 via the second pipe 320. A power device is installed on the second pipe 320 to form a complete cutting fluid circulation loop: the bubble cutting fluid refined by the bubble generating pipe 200 flows back to the storage tank 100 through the first pipe 310, and the power device drives the cutting fluid in the storage tank 100 to be transported to the inlet 211 of the bubble generating pipe 200 through the second pipe 320, so that the cutting fluid continuously circulates between the pressurization chamber 210, the gas generating chamber 220, and the storage tank 100.

[0032] Furthermore, the power unit is a centrifugal pump 321.

[0033] In this embodiment, a centrifugal pump 321 is used as the power unit. Utilizing the compact structure, stable flow rate, and strong head adaptability of the centrifugal pump 321, it can provide continuous and controllable power for the cutting fluid circulation. The centrifugal pump 321, through the centrifugal force generated by the impeller rotation, stably delivers the cutting fluid from the storage tank 100 to the inlet 211 of the pressure chamber 210, ensuring that the flow rate and pressure of the cutting fluid at the inlet of the pressure chamber 210 meet the design requirements. This, in turn, guarantees the effective pressurization of the cutting fluid by the pressure chamber 210 and the stable formation of negative pressure in the gas generation chamber 220. Compared to other power units, the centrifugal pump 321 has advantages such as low energy consumption, simple maintenance, and strong resistance to liquid impurities. It can adapt to the mixing environment of small particles or bubbles that may exist in the cutting fluid, improving the reliability of the circulation conveying mechanism and the overall service life of the device.

[0034] Furthermore, a flow meter 322 is provided on the second pipe 320.

[0035] In this embodiment, the flow meter 322 can monitor the flow parameters of the cutting fluid in real time during the circulation process, providing data support for the control of the bubble generation process. The flow information fed back by the flow meter 322 can be used to intuitively adjust the output power of the power unit or the system operating parameters, so that the flow rate of the cutting fluid in the pressurization chamber 210, the negative pressure intensity in the gas generation chamber 220, and the bubble mixing effect are kept in the optimal state.

[0036] Furthermore, the stirring impeller 400 is located at the bottom or side wall of the liquid storage tank 100.

[0037] In this embodiment, the stirring impeller 400 is located at the bottom of the liquid storage tank 100, driving the cutting fluid at the bottom to flow upwards. This prevents dirt from accumulating at the bottom of the tank. Combined with the carrying effect of impurities during the rising of air bubbles, it makes it difficult for grease, foreign matter, etc., to adhere to the inner cavity of the tank, reducing the frequency of manual cleaning. In other embodiments, the impeller can be located on the side wall, forming a circumferential water flow, eliminating dead zones in the tank and ensuring that the cutting fluid in the entire area of ​​the liquid storage tank 100 can participate in mixing, thus promoting the uniform distribution of air bubbles and cutting fluid. Furthermore, in other embodiments, multiple stirring impellers 400 are provided, with each impeller 400 located at the bottom and side wall of the liquid storage tank 100.

[0038] Furthermore, the stirring impeller 400 is driven to rotate by a drive motor.

[0039] In this embodiment, the stirring impeller 400 is driven to rotate by a drive motor, providing a stable and controllable power source for bubble refinement and cutting fluid mixing. The motor speed can be adjusted according to actual needs to ensure that the impeller stirs at the optimal rate, so that the bubbles are fully broken under the action of shear force, while promoting the circulation of the cutting fluid containing bubbles, accelerating the rise of grease and foreign matter to the liquid surface with the bubbles, and improving the cleanliness of the cutting fluid.

[0040] This embodiment also provides a cutting machine tool including the above-described bubble generating device.

[0041] The cutting machine tool integrates the aforementioned bubble generating device, which can significantly improve machining performance by utilizing the characteristics of (micro-nano-scale) bubbles generated in the cutting fluid. The bubble generating device generates highly stable (micro-nano-scale) bubbles through negative pressure intake in the pressurization chamber 210, initial refining via the screen 240, secondary refining via the stirring impeller 400, and multi-stroke circulation. This significantly extends the coexistence time of the bubbles and the cutting fluid, ensuring that the cutting fluid continuously provides cooling and protection for the cutting tool during the cutting operation. During cutting, the high-pressure environment at the cutting tool tip compresses the bubbles, causing them to burst and vaporize. This process absorbs a large amount of heat, forming a highly efficient vaporization heat absorption and cooling effect, which can quickly reduce the tip temperature and reduce tool wear and thermal damage to the machined surface caused by high temperatures. Simultaneously, the (micro-nano-scale) bubbles form a uniform gas film coating on the cutting tool surface, effectively isolating the cutting material from direct contact with the cutting tool, inhibiting the formation of built-up edge, thereby improving machining accuracy and extending tool life.

[0042] To verify the bubble generation effect of the bubble generating device in this embodiment, sample 1 (cutting fluid after bubble generation by the bubble generating device in this embodiment) and sample 2 (cutting fluid without bubble generation by the bubble generating device in this embodiment) were placed in glass beakers respectively. The light beam was observed by irradiating with a laser pointer. The light beam of sample 1 was obvious, while that of sample 2 was not obvious. The obvious light beam of sample 1 indicates that (micro-nano-scale) bubbles were generated in the cutting fluid after passing through the bubble generating device in this embodiment, and the laser light source formed a light beam through the refraction of the bubbles.

[0043] The preferred embodiments of the present invention have been described in detail above, but the present disclosure is not limited to the embodiments described. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of the present disclosure.

Claims

1. A bubble generating device, characterized by, include: frame; A liquid storage tank is mounted on the frame and is used to store cutting fluid. A bubble generating tube is mounted on the frame. The bubble generating tube contains a pressurizing chamber and a gas generating chamber. The pressurizing chamber has a liquid inlet at its front end and a first liquid outlet at its rear end. The inner diameter of the pressurizing chamber gradually decreases from front to back. The pressurizing chamber and the gas generating chamber are connected through the first liquid outlet. The inner diameter of the gas generating chamber is larger than the maximum inner diameter of the pressurizing chamber. An air inlet channel is provided on the wall of the gas generating chamber, connecting it to the outside environment. A second liquid outlet is provided at the rear end of the gas generating chamber, and a screen is provided on the second liquid outlet. A circulating conveying mechanism is mounted on the frame and is used to circulate and convey cutting fluid between the bubble generating pipe and the storage tank. A stirring impeller is disposed inside the liquid storage tank.

2. The bubble generating device according to claim 1, characterized in that The aperture range of the screen is 30μm-1mm.

3. The bubble generating device according to claim 1, wherein The screen is detachably mounted on the second liquid outlet by means of threads or snaps.

4. The bubble generating device according to claim 1, characterized in that, The front end of the booster chamber extends into the gas-generating chamber, and the outer diameter of the booster chamber extending into the gas-generating chamber gradually decreases along the extension direction. The air intake channel is opposite to the outer wall of the booster chamber extending into the gas-generating chamber.

5. The bubble generating device according to claim 1, characterized in that, The circulating conveying mechanism includes a first pipe and a second pipe. One end of the first pipe is connected to the second outlet, and the other end of the first pipe is connected to the storage tank. One end of the second pipe is connected to the storage tank, and the other end of the second pipe is connected to the inlet. A power device is provided on the second pipe, and the power device is used to convey the cutting fluid in the storage tank to the second pipe.

6. The bubble generating device according to claim 5, characterized in that, The power unit is a centrifugal pump.

7. The bubble generating device according to claim 5, characterized in that, A flow meter is installed on the second pipe.

8. The bubble generating device according to claim 1, characterized in that, The stirring impeller is located at the bottom or side wall of the liquid storage tank.

9. The bubble generating device according to claim 1, characterized in that, The stirring impeller is driven to rotate by a drive motor.

10. A cutting machine tool, characterized in that, Includes the bubble generating apparatus according to any one of claims 1-9.

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