JP2021084068A - Fluid supply device - Google Patents

Abstract

To provide a fluid supply device that can improve lubricity, permeability and cooling effect of a fluid by imparting predetermined flow characteristic to the fluid.SOLUTION: A fluid supply device includes: a storage body; and an internal structure stored in the storage body. The internal structure includes: a shaft part; and multiple projection parts projecting from an outer peripheral surface of the shaft part. The multiple projection parts are respectively formed with at least one step.SELECTED DRAWING: Figure 4

Description

The present invention relates to a fluid supply device of a device that supplies a fluid, and more specifically, to a fluid supply device that imparts a predetermined flow characteristic to a fluid flowing inside the fluid supply device. For example, the fluid supply device of the present invention can be applied as a fluid supply pipe to a cutting fluid supply device of various machine tools such as a grinding machine, a drill, a cutting device, and the like.

Conventionally, when a work piece made of metal, for example, is machined into a desired shape by a machine tool such as a grinding machine or a drill, a working liquid (for example, coolant) is used around the portion where the work piece and the cutting tool come into contact with each other. ) Is used to cool the heat generated during machining and remove chips (also called chips) from the work piece from the machining site. The cutting heat generated by the high pressure and frictional resistance at the contact portion between the work piece and the cutting tool wears the cutting edge and reduces the strength, and shortens the life of the tool such as the cutting tool. Further, if the chips of the workpiece are not sufficiently removed, they may stick to the cutting edge during machining and reduce the machining accuracy.

The machining fluid, also called the cutting fluid, reduces the frictional resistance between the tool and the workpiece, removes cutting heat, and at the same time performs a cleaning action that removes chips from the surface of the workpiece. For this reason, it is preferable that the machining fluid has a small coefficient of friction, a high boiling point, and has a property of penetrating well into the contact portion between the cutting tool and the workpiece.

For example, Japanese Patent Application Laid-Open No. 11-254281 provides a processing apparatus for gas ejection means for ejecting gas (for example, air) in order to forcibly invade a processing liquid into a contact portion between an operating element (cutting tool) and a workpiece. The technology provided in the above is disclosed.

Further, Japanese Patent Application Laid-Open No. 2004-33962 discloses a fluid discharge pipe having a structure in which a spiral blade main body and a shaft body for generating a flip-flop phenomenon are aligned and inserted and fixed in a cylinder main body.

JP-A-11-254281 JP-A-2004-33962

According to a conventional technique such as that disclosed in Patent Document 1, in addition to the means for discharging the processing liquid to the machine tool, additional means for ejecting the gas at high speed and high pressure must be provided, which increases the cost. At the same time, there is a problem that the device becomes large. Further, in the grinding machine, there is a problem that the machining fluid cannot sufficiently reach the contact portion between the grindstone and the workpiece due to the air that is carried along the outer peripheral surface of the grinding wheel that rotates at high speed. Therefore, there is still a problem that it is difficult to cool the processing heat to a desired level because it is difficult to sufficiently permeate the processing liquid only by injecting air in the same direction as the rotation direction of the grinding wheel.

In the fluid discharge pipe structure of Patent Document 2, since the spiral blade main body and the shaft body for generating the flip-flop phenomenon are separate bodies, when both members are made of metal, the tip thereof is an acute-angled blade. , It is necessary to pay attention to the alignment work process, which reduces the work efficiency. There is also a problem that the processing accuracy must be high in order to match the dimensions of the two separated members.

The present invention has been developed in view of such circumstances. An object of the present invention is to provide a fluid supply device which can impart predetermined flow characteristics to a fluid flowing therein to improve the lubricity, permeability and cooling effect of the fluid, and is easy to manufacture. is there.

The present invention has the following configuration in order to solve the above-mentioned problems. That is, it is a fluid supply device and has a storage body and an internal structure housed in the storage body. The internal structure includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion, and at least one step is formed in each of the plurality of protrusions.

Further, in one embodiment of the present invention, the fluid supply device includes a storage body and an internal structure housed in the storage body. The accommodating body includes an inlet and an outlet, and the internal structure includes a first portion and a second portion integrally formed on a common shaft portion having a circular cross section. The first portion is located on the upstream side of the storage body when the internal structure is stored in the storage body, and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion, and a plurality of protrusions of the second portion. The portion is formed by intersecting a spiral flow path that is connected in a spiral shape in which the circumference of the shaft portion is divided into a plurality of parts and a closed flow path that is divided into a plurality of parts in the longitudinal direction of the shaft portion. Is formed with at least one step parallel to the circumferential direction of the shaft portion.
Further, the internal structure according to the embodiment of the present invention is an internal structure housed in a storage body of the fluid supply device, and the internal structure includes a shaft portion and a plurality of internal structures protruding from the outer peripheral surface of the shaft portion. At least one step is formed in each of the plurality of protrusions including the protrusion.
Further, the internal structure of another embodiment of the present invention is an internal structure housed in a storage body of the fluid supply device, and the internal structure is integrated on a common shaft portion having a circular cross section. The first part and the second part formed in the above are included. The first portion is located on the upstream side of the storage body when the internal structure is stored in the storage body, and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion, and a plurality of protrusions of the second portion. The portion is formed by intersecting a spiral flow path that is connected in a spiral shape in which the circumference of the shaft portion is divided into a plurality of parts and a closed flow path that is divided into a plurality of parts in the longitudinal direction of the shaft portion. Is formed with at least one step parallel to the circumferential direction of the shaft portion.
Further, the fluid supply device of another embodiment of the present invention is a fluid supply device, which includes an internal structure and a storage body for accommodating the internal structure. The accommodating body includes an inlet and an outlet, and the internal structure includes a first portion, a second portion, and a third portion, which are integrally formed on a common shaft portion having a circular cross section. Includes a portion and a fourth portion. The first portion is located on the upstream side of the storage body when the internal structure is stored in the storage body, and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion, and the third portion is a second portion. The fourth part is located on the downstream side of the third part, and includes the shaft part and the wing formed spirally so as to generate a spiral flow in the fluid. However, the shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion are included, and at least one of the plurality of protrusions of the fourth portion is parallel to the circumferential direction of the shaft portion. Steps are formed.
Further, in the fluid supply device according to the embodiment of the present invention, storage for storing the first internal structure, the second internal structure, the first internal structure, and the second internal structure. Including the body. The housing includes an inlet and an outlet. The first internal structure includes a head portion and a body portion integrally formed on a common shaft portion having a circular cross section, and the head portion is a first internal structure in a storage body. Is located on the upstream side of the storage body when it is stored, and includes a shaft part and wings formed spirally so as to generate a spiral flow in the fluid, and the body part is on the downstream side from the head. It is located in, and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion. The second internal structure in the form of a hollow shaft includes a head portion integrally formed on the hollow shaft portion and a body portion, and the head portion is a second internal structure in a storage body. Is located on the upstream side of the storage body when it is stored, and includes a shaft part and wings formed spirally so as to generate a spiral flow in the fluid, and the body part is on the downstream side from the head. It is located in, and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion. At least a part of the first internal structure is housed in the hollow portion of the second internal structure, and each of the plurality of protrusions of the body portion of the second internal structure is in the circumferential direction of the shaft portion. On the other hand, at least one step is formed in parallel.
Further, a first portion, a second portion, and a second portion of the internal structure of the fluid supply device according to the embodiment of the present invention, which are integrally formed on a common shaft portion having a circular cross section. The third part and the fourth part are included, and the first part is located on the upstream side of the storage body when the internal structure is stored in the storage body, and the shaft part and the fluid swirl. The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion. The third portion is located downstream of the second portion and includes a shaft portion and a wing spirally formed to generate a spiral flow in the fluid. The fourth portion is located downstream of the third portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion, and each of the plurality of protrusions of the fourth portion. At least one step is formed in parallel with the circumferential direction of the shaft portion.
In addition, in the combination of the first and second internal structures of the fluid supply device of still another embodiment of the present invention, the first internal structure is integrated on a common shaft portion having a circular cross section. The head portion and the body portion are included, and the head portion is located on the upstream side of the storage body when the first internal structure is stored in the storage body, and the shaft portion and the shaft portion are included. It includes wings spirally formed to generate a spiral in the fluid, the body is located downstream of the head, and the shaft and a plurality of protrusions protruding from the outer peripheral surface of the shaft. The second internal structure is in the form of a hollow shaft, and includes a head portion integrally formed on the hollow shaft portion and a body portion, and the head portion includes a portion. When the second internal structure is housed in the storage body, it is located on the upstream side of the storage body and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. The body portion is located on the downstream side of the head portion, and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion. At least a part of the first internal structure is housed in the hollow portion of the second internal structure, and each of the plurality of protrusions of the body portion of the second internal structure is in the circumferential direction of the shaft portion. On the other hand, at least one step is formed in parallel.

If the fluid supply device of the present invention is provided in a fluid supply unit of a machine tool or the like, a large number of fine bubbles (micrometer-order microbubbles or ultrafine bubbles having a smaller particle size) generated inside the fluid supply device (micrometer-order microbubbles or ultrafine bubbles having a smaller particle size) The cleaning effect is improved as compared with the conventional case due to the vibration and impact generated in the process in which the nanometer-order so-called nanobubbles) collide with the tool and the work piece and disappear. This extends the life of tools such as grinding blades and reduces the cost of replacing tools. Further, in the flow characteristics given by the fluid supply device of the present invention, the surface tension of the fluid is lowered due to the generation of fine bubbles and the like, and the penetrating power and the lubricity are enhanced. As a result, the cooling effect of the heat generated at the point where the tool and the workpiece come into contact with each other is greatly increased. It is possible to improve the permeability of the fluid, increase the cooling effect, improve the lubricity, and improve the processing accuracy.

Further, in many embodiments of the present invention, the fluid flow is complicated by forming at least one step in each of the plurality of protrusions provided on the shaft portion of the internal structure of the fluid supply device. Become. That is, a turbulent flow such as a vortex is generated, which is suitable for diffusion, stirring or mixing of the fluid, and a flow path having a narrow cross-sectional area is formed to increase the speed of the fluid and reduce the static pressure. Promotes the induction of cavitation phenomena in the fluid. Further, it is expected that the pressure loss of the fluid supply device is reduced by increasing the total flow rate of the flowing fluid, which is particularly useful when the viscosity of the fluid is high.

The fluid supply device of the present invention can be applied to a coolant supply unit in various machine tools such as grinding machines, cutting machines, drills, and the like. Not only that, it can also be effectively used in devices that mix two or more types of fluids (liquid to liquid, liquid to gas, or gas to gas). The present invention is applicable to various other applications for supplying a fluid. For example, it can be applied to various applications such as a shower nozzle, a hydroponic cultivation device, and a pollutant removal device. In the case of a shower nozzle, water or hot water flows into the fluid supply device to give a predetermined flow characteristic and improve the cleaning effect. In particular, fine bubbles reduce the surface tension of the fluid and increase its permeability. In the case of a hydroponic cultivation device, water can flow into the fluid supply device to increase dissolved oxygen and discharge it. In addition, for the pollutant removal device, a liquid (for example, a liquid containing a specific gas, for example, air or various gases (hydrogen, ozone, oxygen, etc.) dissolved in a liquid (for example, water) and further fine-bubbled It can also be applied when supplied as water).

A deeper understanding of the present application can be obtained when the following detailed description is taken into account in conjunction with the drawings below. These drawings are merely examples and do not limit the scope of the present invention.
An example of a grinding apparatus provided with a fluid supply unit to which the present invention is applied is shown. It is a side view exploded view of the fluid supply pipe which concerns on 1st Embodiment of this invention. It is a side perspective view of the fluid supply pipe which concerns on 1st Embodiment of this invention. It is a three-dimensional perspective view of the internal structure of the fluid supply pipe which concerns on 1st Embodiment of this invention. It is an enlarged view of the protrusion formed in the internal structure of the 1st Embodiment of this invention, and one step is formed. It is a figure explaining an example of the method of forming the flow property providing part of the internal structure of the 1st Embodiment tube of this invention. It is a three-dimensional perspective view of the modification of the internal structure of the fluid supply pipe which concerns on 1st Embodiment of this invention. It is an enlarged view of the protrusion formed in the modified example of the internal structure of 1st Embodiment of this invention, and two steps are formed. It is a figure explaining an example of the method of forming the flow property providing part in the modified example of the internal structure of the 1st Embodiment tube of this invention. It is a side view exploded view of the fluid supply pipe which concerns on 2nd Embodiment of this invention. It is a side perspective view of the fluid supply pipe which concerns on 2nd Embodiment of this invention. It is a side view exploded view of the fluid supply pipe which concerns on 3rd Embodiment of this invention. It is a side perspective view of the fluid supply pipe which concerns on 3rd Embodiment of this invention. It is a side view exploded view of the fluid supply pipe which concerns on 4th Embodiment of this invention. It is a side perspective view of the fluid supply pipe which concerns on 4th Embodiment of this invention. It is a side view exploded view of the fluid supply pipe which concerns on 5th Embodiment of this invention. It is a side perspective view of the fluid supply pipe which concerns on 5th Embodiment of this invention.

In the present specification, an embodiment in which the present invention is mainly applied to a machine tool such as a grinding machine will be described, but the application field of the present invention is not limited to this. The present invention is applicable to various applications for supplying fluids, and can be implemented in a wide range of industrial fields including, for example, shower nozzles, fluid mixing devices, hydroponic cultivation devices, pollutant removing devices, and the like.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows an embodiment of a grinding device including a fluid supply unit to which the present invention is applied. As shown, the grinding device 1 includes a grinding blade (grinding stone) 2, a table 3 for moving the workpiece W on a flat surface, and a column for moving the workpiece W or the grinding blade 2 up and down (not shown). , Etc., and a fluid supply unit 5 for supplying a fluid (that is, a coolant) to the grinding blade 2 and the workpiece W. The fluid is, for example, water. The grinding blade 2 is rotationally driven clockwise in the plane of FIG. 1 by a drive source (not shown), and the workpiece W is driven by friction between the outer peripheral surface of the grinding blade 2 and the workpiece W at the grinding point G. The surface of the is ground. Although not shown, the fluid supply unit 5 includes a tank for storing the fluid and a pump for discharging the fluid from the tank.

The fluid supply unit 5 includes a nozzle 6 having a discharge port for discharging the fluid toward the grinding blade 2 and the workpiece W, a fluid supply pipe P having an internal structure that gives the fluid a predetermined flow characteristic, and a tank. Includes a pipe 9 into which the stored fluid flows by a pump. The joint portion 7 connects the outlet side of the fluid supply pipe P with the nozzle 6. The joint portion 8 connects the inflow port side of the fluid supply pipe P and the pipe 9. The fluid flowing into the fluid supply pipe P from the pipe 9 has a predetermined flow characteristic by its internal structure while passing through the fluid supply pipe P, passes through the outlet of the fluid supply pipe P, and passes through the nozzle 6 to be ground. It is spit out toward G. According to a plurality of embodiments of the present invention, the fluid that has passed through the fluid supply pipe P includes fine bubbles. Hereinafter, various embodiments of the fluid supply pipe P will be described with reference to the drawings. The fluid supply pipe P is not limited to the pipe shape as shown in the following embodiment, and it is possible to use a storage body having an arbitrary outer shape. However, the inner surface of the housing, that is, the surface in contact with the fluid with the internal structure is preferably a pipe structure.

(First Embodiment)
FIG. 2 is a side view of the fluid supply pipe 100 according to the first embodiment of the present invention, and FIG. 3 is a side perspective view of the fluid supply pipe 100. FIG. 4 is a three-dimensional perspective view of the internal structure 140 of the fluid supply pipe 100. As shown in FIGS. 2 and 3, the fluid supply pipe 100 includes a pipe body 110 and an internal structure 140. In FIGS. 2 and 3, the fluid flows from the inflow port 111 to the outflow port 112 side.

The pipe body 110 functions as a storage body for storing the internal structure 140 in the internal space thereof. The pipe body 110 is composed of an inflow side member 120 and an outflow side member 130. The inflow side member 120 and the outflow side member 130 have the form of a pipe having an empty inside in a cylindrical shape. The inflow side member 120 has an inflow port 111 having a predetermined diameter at one end, and a female screw formed by threading an inner peripheral surface on the other end side for connection with the outflow side member 130. It includes 126. A connecting portion 122 is formed on the side of the inflow port 111, and the connecting portion 122 is connected to the joint portion 8 (see FIG. 1). For example, the inflow side member 120 and the joint portion 8 are connected by a screw connection between the female screw formed on the inner peripheral surface of the connecting portion 122 and the male screw formed on the outer peripheral surface of the end portion of the joint portion 8. In the present embodiment, as shown in FIG. 2, the inflow side member 120 has different inner diameters at both ends, that is, the inner diameter of the inflow port 111 and the inner diameter of the female screw 126, and the inner diameter of the inflow port 111 is the female screw 126. Is smaller than the inner diameter of. A tapered portion 124 is formed between the inflow port 111 and the female screw 126. The present invention is not limited to this configuration, and the inflow side member 120 may have the same inner diameter at both ends.

The outflow side member 130 has an outflow port 112 having a predetermined diameter at one end, and a male screw 132 formed by threading an outer peripheral surface on the other end side for connection with the inflow side member 120. To be equipped with. The diameter of the outer peripheral surface of the male screw 132 of the outflow side member 130 is the same as the inner diameter of the female screw 126 of the inflow side member 120. A connecting portion 138 is formed on the side of the outlet 112, and the connecting portion 138 is coupled to the joint portion 7 (see FIG. 1). For example, the outflow side member 130 and the joint portion 7 are connected by a screw connection between the female screw formed on the inner peripheral surface of the connecting portion 138 and the male screw formed on the outer peripheral surface of the end portion of the joint portion 7. A tubular portion 134 and a tapered portion 136 are formed between the male screw 132 and the connecting portion 138. In the present embodiment, the outflow side member 130 has different inner diameters at both ends, that is, the inner diameter of the outlet 112 and the inner diameter of the male screw 132, and the inner diameter of the outlet 112 is smaller than the inner diameter of the male screw 132. The present invention is not limited to this configuration, and the outflow side member 130 may have the same inner diameter at both ends. The inflow side member 120 and the outflow side member 130 are connected by a screw connection between the female screw 126 on the inner peripheral surface of one end of the inflow side member 120 and the male screw 132 on the outer peripheral surface of one end of the outflow side member 130. The tube body 110 is formed.

The above configuration of the tube body 110 is only one embodiment, and the present invention is not limited to the above configuration. For example, the connection between the inflow side member 120 and the outflow side member 130 is not limited to the above-mentioned screw connection, and any method of connecting mechanical parts known to those skilled in the art can be applied. Further, the form of the inflow side member 120 and the outflow side member 130 is not limited to the form shown in FIGS. 2 and 3, and may be arbitrarily selected by the designer or changed depending on the application of the fluid supply pipe 100. it can. The inflow side member 120 or the outflow side member 130 is made of, for example, a metal such as steel or a non-metal such as plastic or resin. Referring to FIGS. 2 and 3 together, the fluid supply pipe 100 has the internal structure 140 housed in the outflow side member 130, and then the male screw 132 on the outer peripheral surface of the outflow side member 130 and the inner circumference of the inflow side member 120. It is understood that it is constructed by coupling with a female thread 126 on the surface.

The internal structure 140 is formed by, for example, a method of processing a cylindrical member made of a metal such as steel or a method of molding plastic (including a method of injection molding). As shown in FIGS. 2 and 4, the internal structure 140 of the present embodiment is integrally formed on a common shaft portion 141 having a circular cross section from the upstream side to the downstream side. It includes a fluid diffusion unit 142, a swirl generation unit 143, a flow characteristic providing unit 145, and an induction unit 150. Each of the fluid diffusion unit 142, the swirl generation unit 143, the flow characteristic providing unit 145, and the induction unit 150 performs, for example, cutting, turning, and grinding a part of one cylindrical member individually or in combination. Is formed by. Alternatively, a 3D printer can be used to form a three-dimensional print from a metal or resin material.

The fluid diffusion portion 142 has a conical shape, and is formed, for example, by conical processing one end of a cylindrical member. The fluid diffusion unit 142 diffuses the fluid flowing into the inflow side member 120 via the inflow port 111 from the center of the pipe to the outside, that is, in the radial direction. The fluid diffusion portion 142 is at a position corresponding to the tapered portion 124 of the inflow side member 120 when the internal structure 140 is housed in the pipe body 110 (see FIG. 3). In the present embodiment, the fluid diffusion portion 142 has a conical shape, but the present invention is not limited to this embodiment. In another embodiment, the fluid diffuser 142 has the form of a dome. The fluid diffusion portion 142 may take other forms, and may have a shape that gradually expands concentrically from one point at the tip. In yet another embodiment, the internal structure 140 does not include a fluid diffusing section 142. These modifications are similarly applicable to other embodiments described below.

The swirl generating portion 143 is a part or all of the head of the internal structure 140 located on the upstream side of the pipe main body 110 when the internal structure 140 is housed in the pipe main body 110. In the fourth embodiment, it is located downstream of the fluid diffusion unit 142. As shown, the spiral generating portion 143 has a shaft portion 141 having a circular cross section and a constant diameter along the length direction, and three spirally formed wings 143-1 and 143-. 2, 143-3 and so on. As shown in FIG. 2, the length l1 in the longitudinal direction of the fluid diffusion portion 142 in the axial direction (direction in which the fluid flows as a whole) is larger than the length l2 in the longitudinal direction of the shaft portion 141 of the swirl generating portion 143. It is short, and the longitudinal length l2 of the shaft portion 141 of the swirl generating portion 143 is shorter than the longitudinal length l3 of the shaft portion 141 of the flow characteristic providing portion 145. That is, the relationship of l1 <l2 <l3 is established between the respective lengths l1, l2, and l3. It should be noted that l1 and l2 can have substantially the same length, or l1 can be longer than l2, but in either case, l3 is longer than l1 and l2. The diameter of the portion having the maximum cross-sectional area of the fluid diffusion portion 142 is the same as the diameter of the shaft portion 141 of the spiral generation portion 143. In another embodiment, the diameter of the portion having the maximum cross-sectional area of the fluid diffusion portion 142 can be smaller or larger than the diameter of the shaft portion 141 of the spiral generation portion 143. In any case, the radius of the portion having the maximum cross-sectional area of the fluid diffusion portion 142 is smaller than the radius of the spiral generating portion 143 (distance from the center of the shaft portion 141 of the spiral generating portion 143 to the tip of each blade). Is preferable. These modifications are similarly applicable to other embodiments described below.

As shown in FIG. 4, the tips of the wings 143-1, 143-2, and 143-3 of the spiral generating portion 143 are offset from each other by 120 ° in the circumferential direction of the shaft portion 141, and the shaft portion is formed. The outer peripheral surface of 141 corresponding to the spiral generating portion 143 is spirally formed counterclockwise at a predetermined interval. Although the number of blades is set to 3 in the present embodiment, the present invention is not limited to such an embodiment. For example, one or two, or four or more wings may be provided. Further, the forms of the blades 143-1, 143-2, and 143-3 of the swirl generating portion 143 are not particularly limited as long as they can generate a swirl flow while the fluid passes between the blades. In the present embodiment, the spiral generating portion 143 has an outer diameter close to the inner peripheral surface of the tubular portion 134 of the outflow side member 130 of the pipe main body 110 when the internal structure 140 is housed in the pipe main body 110. .. According to a certain embodiment, the swirl generation unit 143 may be omitted. In that case, the shaft member 141 may be provided with only the flow characteristic providing portion 145, only the flow characteristic providing portion 145 and the guiding portion 150, or a portion having other functions on the upstream side or the downstream side. .. Such various modifications are similarly applicable to other embodiments described below.

The flow characteristic providing portion 145 is formed on the downstream side of the spiral generating portion 143 with a predetermined section 144 separated from the spiral generating portion 143, and corresponds to a part or all of the body portion of the internal structure 140. As shown in FIGS. 2 and 4, the flow characteristic providing portion 145 includes a shaft portion 141 having a circular cross section and a constant diameter, and a plurality of shaft portions 141 protruding from the outer peripheral surface of the shaft portion 141. Includes a protrusion (convex) 145p. In the present embodiment, the diameter of the shaft portion 141 of the flow characteristic providing portion 145 is larger than the diameter of the spiral generation portion 143 and the shaft portion 141 of the predetermined section 144. Therefore, a sufficient flow rate flowing into the swirl generating section 143 is secured, and the swirling force of the fluid by the swirl generating section 143 becomes sufficiently large. Then, while flowing from the spiral generation unit 143 to the flow characteristic providing unit 145 via the predetermined section 144, the cross-sectional area of the flow path is rapidly reduced to change the fluid flow characteristic. Further, there is a step between the spiral generating portion 143 and the flow characteristic providing portion 145 due to the difference in diameter. Therefore, in order to improve the flow of the fluid, if necessary, the section 144 is formed into a tapered shape in which the diameter of the shaft body 141 is gradually increased, or between a plurality of protrusions 145p of the flow characteristic providing portion 145. A groove for attracting a fluid is formed at least at the inlet of the spiral flow path described later. Such a configuration can be similarly applied to other embodiments described later.

FIG. 5 shows an enlarged shape of one protrusion 145p formed on the flow property providing portion 145. When each of the protrusions 145p is formed by cutting a cylindrical member or the like, the top surface (upper surface) is the outer peripheral surface of the original cylindrical member, and is substantially rhombic (apical angle is approximately 30 degrees). is there. The bottom surface (lower surface) is the outer peripheral surface of the shaft portion 141, and is a substantially parallelogram. In the present embodiment, a step 145p-d1 is provided at approximately 1/3 of the total height from the bottom surface in the height direction of the protrusion 145p (radial direction of the shaft portion 141), and the upper step and the second step are provided. The steps are configured. Of course, the height of the step 145p-d1 can be changed as appropriate, such as at 1/2 of the total height or at 2/3. The step 145p-d1 is formed parallel to the circumferential direction of the shaft portion 141. Alternatively, the step 145p-d1 is parallel to the circumferential direction and perpendicular to the radial direction. The step 145p-d1 is formed by performing cutting, turning, and grinding processes alone or in combination, such as a cutting process using an end mill.

FIG. 6 shows an example of a method for forming the protrusion 145p and the flow path 145r according to the present embodiment. As shown in FIG. 6, a plurality of lines (for example, 14 annular closed streams flowing in parallel) having a constant interval in the direction of 90 degrees with respect to the length direction of the columnar member (horizontal direction in the drawing). The road) and a line (plural, for example, 12 spiral flow paths) inclined at a predetermined angle (for example, 60 degrees) with respect to the length direction are crossed and 90 degrees. In addition to processing such as cutting by skipping between the lines in the direction of 1 once, processing such as cutting is performed by skipping once between the inclined lines. In this way, a plurality of protrusions 145p protruding from the outer peripheral surface of the shaft portion 141 are regularly formed by flying one by one vertically (circumferential direction) and left and right (length direction of the shaft portion 141). At this time, by forming a step 145p-d1 on the protrusion 145p as described above, in the radial direction of the shaft portion 141, the lower surface (or bottom surface), the second stage, and the upper stage (top) from the side closer to the center. It has a three-layer structure (surface or upper surface). A flow path 145r is formed between the respective protrusions 145p. In the present embodiment, when the internal structure 140 is housed in the pipe body 110, the flow characteristic providing unit 145 has an outer diameter that is close to the inner peripheral surface of the tubular portion 134 of the outflow side member 130 of the pipe body 110. Have. The shape of the plurality of protrusions 145p can take various shapes and can be deformed into, for example, a triangle, a polygon, or another shape (at this time, at least one step is provided on the bottom surface of each protrusion. The arrangement can be changed as appropriate (angle, width, etc.) from FIG. This modification is similarly applicable to other embodiments described below.

In the present embodiment, as shown in FIG. 2, the diameter of the shaft portion 141 of the flow characteristic providing portion 145 and the section 144 is larger than the diameter 141 of the shaft portion of the spiral generating portion 143, but may be the same. .. In the present embodiment, a dome-shaped guide portion 150 is provided downstream of the flow characteristic providing portion 145. The fluid guided toward the center by the guiding portion 150 is discharged through the outlet 112 past the tapered portion 136.

Hereinafter, the flow of the fluid while passing through the fluid supply pipe 100 will be described. The fluid flowing in through the inflow port 111 through the pipe 9 (see FIG. 1) by the electric pump in which the impeller (impeller) turns right or left passes between the taper portion 124 and the fluid diffusion portion 142 and is in the center of the pipe. It is diffused from the part to the outside. Then, the fluid passes between the three spirally formed blades 143-1 to 143-3 of the spiral generating portion 143. As a result, the fluid is sent to the flow characteristic providing section 145 in a strong swirl flow by each blade of the swirl generating section 143.

Then, the fluid has a plurality of narrow flow paths 145r (specifically, for example, 12 spiral flow paths and 14 closed flows on the annulus) between the plurality of rhombic protrusions 145p of the flow property providing portion 145. Pass by the crossing channel consisting of the road). When the fluid passes through a plurality of narrow flow paths formed by the plurality of protrusions 145p, turbulence is generated and a large number of minute vortices are generated. Such a phenomenon induces mixing and diffusion of fluids. The structure of the flow property providing unit 145 is also useful when mixing two or more fluids having different properties.

ここで、ｐは流線内の一点での圧力、ρは流体の密度、υはその点での流動の速度、ｇは重力加速度、ｈは基準面に対するその点の高さ、ｋは定数である。上記方程式として表現されるベルヌーイ定理は、エネルギー保存法則を流体に適用したものであり、流れる流体に対して流線上ですべての形態のエネルギーの合計はいつも一定であるということを説明する。ベルヌーイ定理によると、断面積が大きい上流では、流体の速度が遅くて静圧は高い。これに対して、断面積が小さい下流では、流体の速度が速くなり静圧は低くなる。 Further, in the internal structure 140, the flow path formed between the upstream side (spiral generating portion 143) having a large cross-sectional area and the downstream side (a plurality of protrusions 145p of the flow characteristic providing portion 145) having a small cross-sectional area. It has a structure that allows it to flow to 145r). This structure changes the static pressure of the fluid as described below. The relationship between pressure, velocity, and potential energy when no external energy is applied to the fluid is expressed as the following Bernoulli equation.

Here, p is the pressure at one point in the streamline, ρ is the density of the fluid, υ is the velocity of the flow at that point, g is the gravitational acceleration, h is the height of that point with respect to the reference plane, and k is a constant. is there. Bernoulli's theorem, expressed as the above equation, applies the law of conservation of energy to a fluid and explains that the sum of all forms of energy on a streamline is always constant with respect to the flowing fluid. According to Bernoulli's theorem, the fluid velocity is slow and the static pressure is high in the upstream where the cross-sectional area is large. On the other hand, in the downstream where the cross-sectional area is small, the velocity of the fluid becomes high and the static pressure becomes low.

When the fluid is a liquid, vaporization of the liquid begins when the reduced static pressure reaches the saturated vapor pressure of the liquid. Such a phenomenon in which the static pressure becomes lower than the saturated vapor pressure within a very short time at almost the same temperature (3000-4000 Pa in the case of water) and the liquid is rapidly vaporized is called cavitation. The internal structure of the fluid supply pipe 100 of the present invention induces such a cavitation phenomenon. Due to the cavitation phenomenon, the liquid boils with minute bubble nuclei of 100 microns or less existing in the liquid as nuclei, and many small bubbles are generated due to the release of dissolved gas. That is, a large number of fine bubbles are generated while the fluid passes through the flow characteristic providing unit 145. In particular, in the present embodiment, since the diameter of the shaft portion 141 of the flow characteristic providing portion 145 is larger than the diameter of the shaft portion 141 of the spiral generating portion 143, the fluid flows while flowing from the swirl generating portion 143 to the flow characteristic providing portion 145. The road narrows sharply, and as a result, the cavitation phenomenon described above is further amplified. Further, since the step 145p-d1 is provided on the plurality of protrusions 145p of the flow characteristic providing portion 145, the flow path becomes more complicated, turbulence (for example, a vortex) is generated, and the cross-sectional area is increased. Since the narrow flow path is formed in a complicated manner, the velocity of the fluid becomes high and the static pressure becomes low in the narrow flow path, so that the induction of the cavitation phenomenon of the fluid described later is promoted and fine bubbles are effectively generated.

And in the case of water, one water molecule can form a hydrogen bond with the other four water molecules, and it is not easy to break this hydrogen bond network. Therefore, water has a much higher boiling point and melting point than other liquids that do not form hydrogen bonds, and exhibits a high viscosity. Since the high boiling point of water brings about an excellent cooling effect, it is often used as cooling water for processing equipment that performs grinding, etc., but the size of water molecules is large and the permeability and lubricity to the processed part are good. There is a problem that there is no. Therefore, in many cases, a special lubricating oil (that is, cutting oil), which is not usually water, is used alone or in combination with water. By the way, when the fluid supply pipe of the present invention is used, water vaporizes due to the above-mentioned cavitation phenomenon, and as a result, the hydrogen bond network of water is destroyed and the viscosity becomes low. In addition, the fine bubbles generated by vaporization improve the permeability and lubricity. Improving permeability results in increased cooling efficiency. Therefore, according to the present invention, it is possible to improve the processing quality, that is, the performance of the machine tool, by using only water without using a special lubricating oil.

The fluid that has passed through the flow property providing portion 145 flows toward the end portion of the internal structure 140 via the guiding portion 150. When flowing from a plurality of narrow flow paths of the flow characteristic providing portion 145 to the tapered portion 136 of the outflow side member 130, the flow path rapidly widens. The fluid flows out through the outlet 112 and is discharged through the nozzle 6 toward the grinding point G. When the fluid is discharged through the nozzle 6, a large number of fine bubbles generated in the flow characteristic providing unit 145 are exposed to atmospheric pressure, collide with the grinding blade 2 and the workpiece W, and the bubbles are broken or exploded and disappear. .. The vibrations and impacts generated in the process of extinguishing the bubbles effectively remove sludge and chips generated at the grinding point G. In other words, the cleaning effect around the grinding point G is improved while the fine bubbles disappear.

The fluid supply pipe 100 of the present invention can be applied to a machining fluid supply unit in various machine tools such as a grinding device, a cutting device, and a drill. By providing it in the fluid supply part of a machine tool or the like, the heat generated by the grinding blade and the workpiece can be cooled more effectively than before, and the permeability and lubricity are improved to improve the machining accuracy. Can be improved. Further, by effectively removing chips from the workpiece from the machined portion, the life of a tool such as a cutting blade can be extended, and the cost consumed for replacing the tool can be reduced. Further, by providing the step 145p-d1 on the protrusion 145p, a part of the side surface of the protrusion 145p is cut out, and as a result, the cross-sectional area of the flow path between the protrusions 145p becomes large, thereby providing the fluid characteristics. It is expected that the pressure loss of the fluid supply device will be reduced by increasing the cross-sectional area of the flow path of the part 145 and increasing the flow rate of the fluid flowing through the flow path. It is useful.

In the present embodiment, one cylindrical member is processed to integrally form the fluid diffusion portion 142, the swirl generation portion 143, the flow characteristic providing portion 145, and the induction portion 150 of the internal structure 140, so that the internal structure 140 is formed. Manufactured as a single integrated component. Therefore, after the internal structure 140 is housed inside the outflow side member 130, the outflow side member 130 and the inflow side member 120 are joined (for example, the male screw 132 of the outflow side member 130 and the female screw 126 of the inflow side member 120. The fluid supply pipe 100 can be manufactured only by a simple process (by screw coupling). Further, since it is not necessary to pay much attention to the alignment and dimensional matching between the spiral generating unit 143 and the flow characteristic providing unit 145, the time and cost required for processing and assembling can be saved.

The fluid supply pipe of one embodiment of the present invention can also be effectively used in an apparatus for mixing two or more fluids (liquid to liquid, liquid to gas, gas to gas, etc.). In particular, since the protrusion 145p of the flow characteristic providing portion 145 is provided with one step 145p-d1, turbulence occurs in the fluid and the mixing efficiency of the fluid is improved. For example, if this fluid supply pipe is applied to a combustion engine, combustion efficiency is improved by sufficiently mixing fuel and air. Further, if this fluid supply pipe is applied to a cleaning device, the cleaning effect can be further improved as compared with a normal cleaning device. Furthermore, this fluid supply pipe can be used in a hydroponic cultivation apparatus to increase the dissolved oxygen in the supply water to maintain or increase the amount of oxygen in the water (dissolved oxygen concentration).

(Modified example of the first embodiment)
Next, a modified example of the first embodiment will be described with reference to FIGS. 7 to 9. This modification is different from the first embodiment in that two steps are provided on the protrusions. Since other points are the same as those of the first embodiment, the same reference numerals are given to the same parts, and the description thereof will be omitted. FIG. 7 is a three-dimensional perspective view of the internal structure 1140, and FIG. 8 shows an enlarged view of the protrusion 1145p on the shaft body 141 provided in the network of the flow characteristic providing portion 1145. In this modification, a step 1145p-d1 is located at approximately 1/3 of the total height from the bottom surface of the protrusion 1145p in the height direction (radial direction of the shaft portion 141), and a step 1145p is located approximately 2/3. -D2 is provided respectively, and the upper stage, the second stage, and the third stage are configured. The steps 1145p-d1 and 1145pp-p2 are formed parallel to the circumferential direction of the shaft portion 141. Alternatively, the steps 1145p-d1 and 1145p-d2 are parallel to the circumferential direction and perpendicular to the radial direction. Of course, the heights of the steps 1145p-d1 and 1145p-d2 can be changed as appropriate. Further, the number of steps may be three or more. The steps 1145p-d1 and 1145-d2 are formed by performing cutting, turning, and grinding processes alone or in combination, such as a cutting process using an end mill.

FIG. 9 shows an example of a method of forming the protrusion 1145p and the flow path 1145r according to this modification. Similar to the first embodiment shown in FIG. 6, the protrusion 1145p and the flow path 1145r are formed. At this time, by forming the steps 1145p-d1 and 1145p-d2 on the protrusion 1145p, in the radial direction of the shaft portion 141, the lower surface (or bottom surface) from the side closer to the center, the third step, the second step, and the upper step. It has a four-layer structure (top surface or top surface). A flow path 1145r is formed between the respective protrusions 1145p. Similar to the first embodiment, this flow path 1145r also has a plurality of lines (for example, 14 lines flowing in parallel) having a constant interval in the direction of 90 degrees with respect to the length direction of the cylindrical member (horizontal direction in the drawing). An annular closed flow path) and a line (plural, for example, 12 spiral flow paths) inclined at a predetermined angle (for example, 60 degrees) with respect to the length direction. It will be crossed. The shape of the plurality of protrusions 1145p may be a rhombus or a parallelogram (or a quadrangle) in cross section, or may have various shapes, and may be deformed into, for example, a triangle, a polygon, or another shape. (At this time, at least two steps are provided on each protrusion at a certain height from the bottom surface), and the arrangement thereof can be changed as appropriate (angle, width, etc.) from FIG.

Therefore, by forming at least two steps 1145p-d1 and 1145p-d2 on the protrusion 1145p of the flow characteristic providing portion 1145, turbulence is more likely to occur in the fluid, and the fluid is diffused, stirred or mixed. Increases efficiency. Further, in a flow path having a small cross-sectional area, the velocity of the fluid becomes high and the static pressure decreases to promote the occurrence of the cavitation phenomenon, which is effective in the generation of fine bubbles. In addition, the steps 1145p-d1 and 1145p-d2 cut out a part of the side surface of the protrusion 1145p, and as a result, the cross-sectional area of the flow path between the protrusions 1145p becomes large, so that the flow rate of the flowing fluid becomes the whole. It is expected that the pressure loss of the fluid supply device will be reduced, and it will be more useful when the viscosity of the fluid is high.

(Second Embodiment)
10A and 10B show a side view and a side perspective view of the fluid supply pipe 200 according to the second embodiment of the present invention. In the present embodiment, the first embodiment is different from the first embodiment in that a predetermined section between the swirl generating portion and the fluid characteristic providing portion of the internal structure is tapered and guided to the fluid outflow portion. It is different from the point that the part is not provided. Since other points are the same as those of the first embodiment, the same reference numerals are given to the same parts, and the description thereof will be omitted.

In the present embodiment, a taper is provided in a predetermined section 244 between the swirl generating portion 143 and the fluid characteristic providing portion 145 of the internal structure 240 installed in the fluid supply pipe 200. That is, since the diameter of the shaft body of the portion of the spiral generating portion 143 is smaller than the diameter of the shaft body of the portion of the spiral generating portion 145, the diameter is gradually increased in order to make the change in size gentle. ing. Further, in the internal structure 240, a fluid diffusion portion 142, a spiral generation portion 143, a predetermined section 244, and a flow characteristic providing portion 145 are integrally formed on one shaft body from the upstream, and an induction portion is formed on the most downstream side. Is not provided.

Also in the present embodiment, the protrusion 145P of the flow characteristic providing portion 145 is provided with one step 145p-d1 (see FIG. 5) as in the first embodiment. Alternatively, the protrusion 145p may be provided with two steps (see FIG. 8) or more steps as in the modified example of the first embodiment. By providing one or more such steps on the protrusions, turbulence is more likely to occur in the fluid, and the efficiency of diffusion, stirring or mixing of the fluid is increased. Further, the flow path having a small cross-sectional area increases the velocity of the fluid and reduces the static pressure to promote the occurrence of the cavitation phenomenon, which is effective for the generation of fine bubbles. In addition, it is expected that the pressure loss of the fluid supply device will be reduced by increasing the flow rate of the flowing fluid as a whole, which will be more useful when the viscosity of the fluid is high.

(Third Embodiment)
11A and 11B show a side view and a side perspective view of the fluid supply pipe 300 according to the third embodiment of the present invention. The present embodiment is different from the second embodiment in that a conical guide portion is provided in the fluid outflow portion. Since other points are the same as those of the second embodiment, the same reference numerals are given to the same parts, and the description thereof will be omitted.

In the present embodiment, in the internal structure 340, a fluid diffusion portion 142, a spiral generation portion 143, a predetermined section 244, a flow characteristic providing portion 145, and an induction portion 350 are integrally formed on one shaft body from the upstream. The guide portion 350 on the most downstream side has a conical shape. A part of the fluid is guided while rotating along the conical guide portion 350, and flows out from the outlet 112 of the fluid supply pipe 300.

Also in the present embodiment, the protrusion 145P of the flow characteristic providing portion 145 is provided with one step 145p-d1 (see FIG. 5) as in the first embodiment. Alternatively, the protrusion 145p may be provided with two steps (see FIG. 8) or more steps as in the modified example of the first embodiment. By providing one or more such steps on the protrusions, turbulence is more likely to occur in the fluid, and the efficiency of diffusion, stirring or mixing of the fluid is increased. Further, a flow path having a small cross-sectional area is formed, the velocity of the fluid becomes high, the static pressure decreases, the occurrence of the cavitation phenomenon is promoted, and it becomes effective for the generation of fine bubbles. In addition, it is expected that the pressure loss of the fluid supply device will be reduced by increasing the flow rate of the flowing fluid as a whole, which will be more useful when the viscosity of the fluid is high.

(Fourth Embodiment)
Next, the fluid supply pipe 400 according to the fourth embodiment of the present invention will be described with reference to FIGS. 12A and 12B. Regarding the same configuration as that of the first embodiment, the same drawing reference numerals will be used, the description thereof will be omitted, and the differences will be described in detail. FIG. 12A is a side view of the fluid supply pipe 400 according to the fourth embodiment, and FIG. 14B is a side perspective view of the fluid supply pipe 400. In FIGS. 14 and 15, the fluid flows from the inflow port 111 to the outflow port 112 side.

The fluid supply pipe 400 includes a hollow shaft type second internal structure 460 housed in the pipe body 110 and a first internal structure 440 housed in the hollow portion of the second internal structure 460. .. In the fluid supply pipe 400, after inserting the first internal structure 440 into the hollow portion of the second internal structure 460, these are stored in the outflow side member 130 in that state, and the second internal structure 460 has a fluid supply pipe 400. It is understood that the holding plate 480 is placed at the head and the male screw 132 on the outer peripheral surface of the outflow side member 130 and the female screw 126 on the inner peripheral surface of the inflow side member 120 are joined. The fluid flowing in through the inflow port 111 separately flows into the hollow portion of the second internal structure 460 and the inside of the outflow side member 130.

The first internal structure 440 is formed by, for example, a method of processing a cylindrical member made of a metal such as steel, a method of molding plastic (including a method of injection molding), or the like. In addition, a 3D printer can be used to form a three-dimensional print from a metal or resin material. The first internal structure 440 has a fluid diffusion portion 442 integrally formed on a common shaft portion 441 having a circular cross section from the upstream side to the downstream side, and a first spiral generation portion 443. A tapered predetermined section 444, a first flow characteristic providing portion 445, and a first guiding portion 450 are included. The first swirl generating portion 443 corresponds to a part or all of the head of the first internal structure 440, and the first flow characteristic providing portion 445 is one of the body portions of the first internal structure 440. Corresponds to part or all. The head is located on the upstream side of the pipe body 110 when the first internal structure 440 is housed in the pipe body 110, and the body portion is located on the downstream side of the head. When the first internal structure 440 is produced by processing a cylindrical member, the fluid diffusion portion 442 can be formed by processing one end of the cylindrical member into a conical shape. The fluid diffusion unit 442 diffuses the fluid flowing into the inflow side member 120 via the inflow port 111 from the center of the pipe to the outside, that is, in the radial direction. In the present embodiment, the fluid diffusion unit 442 has a conical shape, but the present invention is not limited to this embodiment, and the fluid diffusion unit 442 may have other forms. In one embodiment, the fluid diffusing section 442 has the form of a dome.

The first spiral generating portion 443 of the first internal structure 440 has the same structure as the spiral generating portion 143 of the first embodiment, and can be formed by the same method. The first spiral generating portion 443 has a circular cross section, and includes a shaft portion 441 having a constant diameter along the direction in which the fluid flows as a whole, and three spirally formed blades. In the present embodiment, the length l2 of the first swirl generating portion 443 is longer than the length l1 of the fluid diffusing portion 442 and shorter than the length l3 of the first flow characteristic providing portion 445. Further, the radius of the portion having the maximum cross-sectional area of the fluid diffusion portion 442 is the same as the radius of the shaft portion 441 of the first spiral generating portion 443. On the other hand, the radius of the portion having the maximum cross-sectional area of the fluid diffusion portion 442 is preferably smaller than the distance from the center of the shaft portion of the first spiral generating portion 443 to the tip of the blade. The tips of the blades of the first spiral generating portion 443 are shifted by 120 ° from each other in the circumferential direction of the shaft portion, and a predetermined interval is provided on the outer peripheral surface from one end to the other end of the corresponding shaft portion. It is formed in a spiral shape counterclockwise. Although the number of blades is set to 3 in the present embodiment, the present invention is not limited to such an embodiment. Further, the wing form of the first swirl generating section 443 is such that the fluid diffused by the fluid diffusing section 442 and entering the first swirl generating section 443 causes a swirl flow while passing between the blades. The form is not particularly limited as long as it can be used. On the other hand, in the present embodiment, the first spiral generating portion 443 receives the inner peripheral surface of the second internal structure 460 when the first internal structure 440 is housed in the hollow portion of the second internal structure 460. It has an outer diameter close to that of.

The first flow characteristic providing portion 445 of the first internal structure 440 is formed on the downstream side of the fluid diffusion portion 442 and the first swirl generating portion 443. The first flow property providing portion 445 includes a shaft portion 441 having a circular cross section and a constant diameter along the length direction, and a plurality of protrusions 445p protruding from the outer peripheral surface of the shaft portion. Each protrusion has a pillar shape having a substantially rhombic cross section, and a plurality of protrusions 445p are formed in a net shape. Each protruding portion 445p is a spiral flow in which, for example, the outer peripheral surface of a cylindrical member (shaft portion) is divided into a plurality of spirals so as to protrude outward in the radial direction from the surface of the shaft portion. It is formed by cutting or grinding so that the path and the annular closed flow path divided into a plurality of parts in the longitudinal direction of the shaft portion intersect. At this time, the protrusion 445p is formed with one or a plurality of steps (see FIGS. 5 and 8) as in the first embodiment and its modification, which complicates the flow path. The diameter of the shaft portion of the first flow characteristic providing portion 445 is larger than the diameter of the shaft portion of the first spiral generating portion 443. Therefore, a tapered predetermined section 444 is provided so that the fluid flows smoothly between the two. In another embodiment, the diameter of the shaft portion 441 of the first flow characteristic providing portion 445 is the same as the diameter of the shaft portion 441 of the first spiral generating portion 443. In the present embodiment, when the first internal structure 440 is housed in the hollow portion of the second internal structure 460, the first flow characteristic providing unit 445 is placed on the inner peripheral surface of the second internal structure 460. It has an outer diameter that is close to each other. The shape of the cross section of the protrusion is not limited to a rhombus, and may be a triangle or another polygon.

The first guide portion 450 of the first internal structure 440 is formed, for example, by processing the downstream end portion of the cylindrical member into a dome shape. A shaft portion 441 of the first flow characteristic providing portion 445 extends between the first flow characteristic providing portion 445 and the first guiding portion 450. In the present embodiment, the length l4 of the shaft extension portion 446 is the first of the first internal structure 440 when the first internal structure 440 is housed in the hollow portion of the second internal structure 460. The guide portion 450 of the above is determined to project out of the second internal structure 460. In one example, the length l4 of the shaft extension portion 446 is the same as the length l5 of the second induction portion 470 of the second internal structure 460. In the present embodiment, the first guide portion 450 has a dome shape, but the present invention is not limited to this embodiment, and the first guide portion 450 may have another form (for example, a conical shape). Is. Alternatively, the first internal structure 440 may not include an induction portion.

The second internal structure 460 has a hollow shaft shape, and is formed by, for example, a method of processing a cylindrical member made of a metal such as steel, a method of molding plastic (for example, injection molding), or the like. In addition, a 3D printer can be used to form a three-dimensional print from a metal or resin material. The second internal structure 460 includes a second spiral generating portion 463 formed integrally on a common hollow shaft member 461 from the upstream side to the downstream side, and a predetermined tapered section 464. , A second flow characteristic providing unit 465 and a second induction unit 470 are included. The second swirl generating portion 463 corresponds to a part or all of the head of the second internal structure 460, and the second flow characteristic providing portion 465 is one of the body portions of the second internal structure 30. Corresponds to part or all. The head is located on the upstream side of the pipe body 110 when the second internal structure 460 is housed in the pipe body 110, and the body portion is located on the downstream side of the head. In the present embodiment, the inner diameter of the second internal structure 460 (that is, the diameter of the hollow portion) is larger on the inlet side than on the outlet side. The first internal structure 440 is inserted through the inflow port 471 of the hollow portion of the second internal structure 460, and the first internal structure 440 is inserted through the outlet 472 of the hollow portion of the second internal structure 460. The guide portion 450 of 1 protrudes.

The second spiral generating portion 463 of the second internal structure 460 has the same structure as the spiral generating portion 143 of the first embodiment, and can be formed by the same method. The second spiral generating portion 463 includes a shaft portion 461 having a circular cross section and a constant diameter along the length direction, and three spirally formed blades. When the second internal structure 460 is produced by processing the cylindrical member, the second spiral generating portion 463 is formed by processing one end portion of the cylindrical member. The tips of the blades of the second spiral generating portion 463 are shifted by 120 ° from each other in the circumferential direction of the shaft portion, and the outer peripheral surfaces of the blades from one end to the other end of the shaft portion are opposed to each other at a predetermined interval. It is formed in a spiral shape clockwise. Although the number of blades is set to 3 in the present embodiment, the present invention is not limited to such an embodiment. Further, in the wing form of the second swirl generating portion 463, the fluid diffused by the fluid diffusing portion 442 of the first internal structure 440 and entering the second swirl generating portion 463 passes between the blades. The form is not particularly limited as long as it can generate a swirl flow during the process. In the present embodiment, the second spiral generating portion 463 approaches the inner peripheral surface of the tubular portion 134 of the outflow side member 130 of the pipe main body 110 when the second internal structure 460 is housed in the pipe main body 110. Has a degree of outer diameter.

The second flow property providing unit 465 of the second internal structure 460 has the same structure as the flow property providing unit 145 of the first embodiment, and can be formed by the same method. Specifically, the second flow characteristic providing portion 465 is formed by a shaft portion having a circular cross section and having a constant diameter along the length direction of the shaft portion 461 and protruding from the outer peripheral surface of the shaft portion. Includes a plurality of protrusions 465p. Each of the protrusions 465p has a pillar shape having a substantially diamond-shaped cross section, and a plurality of protrusions 465p are formed in a net shape. Each protrusion is a spiral flow path connected in a spiral shape in which the outer peripheral surface of a cylindrical member (shaft) is divided into a plurality of parts so as to project outward from the surface of the shaft 461 in the radial direction. It is formed by cutting, grinding, or the like so as to intersect with a plurality of annular closed flow paths divided in the longitudinal direction of the shaft portion. At this time, the protrusion 465p is formed with one or a plurality of steps (see FIGS. 5 and 8) as in the first embodiment and its modification, which complicates the flow path. The diameter of the shaft portion of the second flow characteristic providing portion 465 is larger than the diameter of the shaft portion of the second spiral generating portion 463, and a tapered predetermined section 464 is provided so that the fluid flows smoothly between the two. .. In the present embodiment, when the second internal structure 460 is housed in the pipe body 110, the second flow characteristic providing unit 465 is placed on the inner peripheral surface of the tubular portion 134 of the outflow side member 130 of the pipe body 110. It has an outer diameter that is close to each other.

The second guide portion 470 of the second internal structure 460 is formed, for example, by processing the downstream end portion of the cylindrical member into the shape of a head dome (a dome with the head cut off). As shown, a shaft portion 461 of the second flow characteristic providing portion 465 extends between the second flow characteristic providing portion 465 and the second induction portion 470. The length of the shaft extension portion 466 is determined based on, for example, the convenience of processing and the dimensions of the first internal structure 440. The second guide portion 470 is not limited to the shape of the head dome, and may have other shapes. In another embodiment, the second guide portion 470 is formed in a conical shape.

The hollow portion of the second internal structure 460 preferably has an inner diameter on the inflow port 471 side larger than an inner diameter on the outflow port 472 side. In the present embodiment, the second internal structure 460 has the same inner diameter from the inflow port 471 to the shaft extension portion 466 of the second flow characteristic providing portion 465, and is smaller in the second induction portion 470. Has an inner diameter. Therefore, in the hollow portion of the second internal structure 460, there is a step 468 at the boundary between the shaft extension portion 466 and the second guide portion 470. As a result, the first internal structure 440 can be housed in the hollow portion of the second internal structure 460 through the inflow port 471 of the second internal structure 460, and the first internal structure 440 can be accommodated. It is possible to prevent the outlet from leaving to the outside through the outlet 472. The size of the inner diameter of the second guide portion 470 is larger than the outer diameter of the first guide portion 450 of the first internal structure 440.

As shown in FIG. 12A, the fluid supply pipe 400 includes a presser plate 480, which is made of, for example, a metal or plastic such as steel. In the present embodiment, as shown, the presser plate 480 prevents the first internal structure 440 from detaching through the inflow port 111 of the pipe body 110. Specifically, after the first internal structure 440 is put in the hollow portion of the second internal structure 460, these are stored in the outflow side member 130 in that state, and the first internal structure 440 With the presser plate 480 placed at the head of the second internal structure 460 so that the fluid diffusion portion 442 protrudes through the presser plate 480, the male screw 132 on the outer peripheral surface of the outflow side member 130 and the inside of the inflow side member 120. The fluid supply pipe 400 is configured by screw coupling with the female screw 126 on the peripheral surface. In the above assembled state, the first internal structure 440 cannot be separated from the inflow port 111 of the pipe body 110 by the holding plate 480, and at the same time, the radius of the outflow port 472 of the second internal structure 460 is the inflow port 471. Because it is smaller than the radius of, it cannot escape to the outside of the outlet 472 of the second internal structure 460. The presser plate 480 serves to restrain the first internal structure 440 to the hollow portion of the second internal structure 460.

Hereinafter, the flow of the fluid while passing through the fluid supply pipe 400 will be described. While passing through the space of the tapered portion 124 of the inflow side member 120, the fluid hits the fluid diffusion portion 442 of the protruding first internal structure 440 and outwards from the center of the fluid supply pipe 400 (that is, the radius). Diffuse (in the direction). Then, a part of the inflowing fluid flows into the hollow portion of the second internal structure 460 in which the first internal structure 440 is housed, and the rest is housed in the second internal structure 460. It flows into the space inside the outflow side member 130.

The fluid flowing through the hollow portion of the second internal structure 460 containing the first internal structure 440 is of three blades spirally formed in the counterclockwise direction of the first spiral generating portion 443. Go through the gap. The fluid diffusion unit 442 acts to guide the fluid so that the fluid flowing in through the pipe 9 effectively enters the first swirl generation unit 443. The fluid is formed into a strong swirl flow by each blade of the first swirl generating section 443 and sent to the first flow characteristic providing section 445.

Then, the fluid passes between the plurality of protrusions 445p regularly formed on the outer peripheral surface of the shaft portion of the first flow characteristic providing portion 445. These plurality of protrusions form a plurality of narrow flow paths 445r. When the fluid passes through the plurality of narrow flow paths 445r formed by the plurality of protrusions 445p, a large number of minute vortices are generated and a cavitation phenomenon occurs, and as a result, fine bubbles are generated. The structure of the first flow property providing unit 445 is also useful when mixing two or more fluids having different properties.

That is, the first internal structure 440 is formed between the upstream portion having a large cross-sectional area (first swirl generation portion 443) and the downstream portion having a small cross-sectional area (a plurality of protrusions 445p of the first fluid characteristic providing portion 445). It has a structure that allows fluid to flow through the flow path. The first internal structure 440 of the fluid supply pipe 400 according to the present embodiment induces the above-mentioned cavitation phenomenon, and a large number of fine bubbles are generated while the fluid passes the first flow characteristic providing unit 445. Fine bubbles improve the permeability and lubricity of the fluid, which results in increased cooling efficiency.

The fluid flows past the first flow property providing portion 445 and toward the end of the first internal structure 440. The fluid is directed from the plurality of narrow flow paths 445r formed by the plurality of protrusions 445p of the first flow property providing portion 445 toward the first guide portion 25 formed at the end of the first internal structure 440. When it flows, the flow path rapidly widens. At this time, the curved surface of the first guide portion 25 in the dome shape of the first internal structure 440 guides the fluid to flow along the surface of the first guide portion 450, and the first guide in the dome shape. The fluid guided toward the center by the portion 450 passes through the tapered portion 136 of the outflow side member 130 and flows out through the outflow port 112.

The fluid flowing through the space inside the outflow side member 130 in which the second internal structure 460 is housed is between the three blades spirally formed in the counterclockwise direction of the second spiral generating portion 463. Go through. The fluid is formed into a strong swirl flow by each blade of the second swirl generating section 463 and sent to the second flow characteristic providing section 465. Then, the fluid passes between the plurality of protrusions 465p regularly formed on the outer peripheral surface of the shaft portion of the second flow characteristic providing portion 465. The second internal structure 460, like the first internal structure 440, has a large cross-sectional area upstream (second swirl generating portion 463) and a small cross-sectional area downstream (second flow characteristic providing portion 465). It has a structure in which a fluid flows through a flow path 465r) formed between a plurality of protrusions 465p. Due to the structure of the second flow characteristic providing unit 465, a large number of minute vortices are generated in the fluid and a cavitation phenomenon occurs, and as a result, fine bubbles are generated in the fluid.

The fluid flows past the second flow property providing portion 465 towards the end of the second internal structure 460. The fluid flows from the plurality of narrow flow paths formed by the plurality of protrusions of the second flow property providing portion 465 toward the second induction portion 470 formed at the end of the second internal structure 460. Then, the flow path rapidly widens, and the fluid is guided to flow along the surface of the second induction portion 470. The fluid guided toward the center by the second dome-shaped guiding portion 470 passes through the tapered portion 136 of the outflow side member 130 and flows out through the outflow port 112.

The fluid flowing through the hollow portion of the second internal structure 460 and the fluid flowing through the space inside the outflow side member 130 merge at the tapered portion 136 and flow out through the outflow port 112.

In the present embodiment, one member is processed to form a fluid diffusion portion 442 of the first internal structure 440, a first swirl generation portion 443, a first flow characteristic providing portion 445, and a first induction. Since the portion 450 is formed, the first internal structure 440 is manufactured as one integrated part. Further, since one member is processed to form the second spiral generating portion 463 of the second internal structure 460, the second flow characteristic providing portion 465, and the second guiding portion 470, the second The internal structure 460 of the above is manufactured as one integrated part. Due to the above structure and dimensional relationship, the first internal structure 440, the second internal structure 460, and the holding plate 480 can be self-aligned. Therefore, with the first internal structure 440 inserted in the hollow portion of the second internal structure 460, the second internal structure 460 is inserted inside the outflow side member 130, and the holding plate 480 is inserted in the first. The fluid supply pipe 400 can be manufactured only by a simple step of connecting the male screw 132 of the outflow side member 130 and the female screw 126 of the inflow side member 120 after placing the head of the internal structure 440. That is, the parts of the fluid supply pipe 400 can be easily assembled, and the time required for manufacturing the fluid supply pipe 400 is shortened.

In the fourth embodiment, the two internal structures are housed in the pipe body, but an embodiment of providing a multilayer fluid supply pipe including three or more internal structures is also possible. Since each internal structure includes a flow characteristic providing portion, a large amount of fine bubbles are generated in the fluid flowing into the fluid supply pipe. By providing one or more steps on the protrusions of the fluid property providing portion of at least one of the plurality of internal structures, turbulence is more likely to occur in the fluid, and the fluid is diffused and agitated. Alternatively, the efficiency of mixing increases. Further, a flow path having a small cross-sectional area is formed, the velocity of the fluid becomes high, the static pressure decreases, the occurrence of the cavitation phenomenon is promoted, and it becomes effective for the generation of fine bubbles. In addition, it is expected that the pressure loss of the fluid supply device will be reduced by increasing the flow rate of the flowing fluid as a whole, which will be more useful when the viscosity of the fluid is high.

(Fifth Embodiment)
Next, the fluid supply pipe 500 according to the fifth embodiment of the present invention will be described with reference to FIGS. 13A and 13B. The description of the same configuration as that of the first embodiment will be omitted, and the differences will be described in detail. The same drawing reference numerals are used for the same components as the components of the first embodiment. FIG. 13A is a side view of the fluid supply pipe 500 according to the fifth embodiment, and FIG. 13B is a side perspective view of the fluid supply pipe 500.

As shown, the fluid supply pipe 500 includes a pipe body 110 and an internal structure 540. The internal structure 540 includes a fluid diffusion portion 542 formed integrally on a common shaft portion 541 having a circular cross section from the upstream side to the downstream side, a first spiral generation portion 543, and a first swirl generation portion 543. 1. The flow characteristic providing unit 545, the second swirl generating unit 547, the second flow characteristic providing unit 549, and the dome-shaped guiding unit 550 are included. The internal structure 540 is formed by, for example, a method of processing a cylindrical member made of a metal such as steel or a method of molding plastic (including a method of injection molding). In addition, a 3D printer can be used to form a three-dimensional print from a metal or resin material.

The fluid diffusion unit 542 has the same structure as the fluid diffusion unit 142 of the first embodiment, and can be formed by the same method. The first spiral generation unit 543 corresponds to a part or all of the head of the internal structure 340 located on the upstream side of the pipe body 110 when the internal structure 540 is housed in the pipe body 110. Each of the first swirl generating section 543 and the second swirl generating section 547 has the same structure as the swirl generating section 143 of the first embodiment, and can be formed by the same method. Each of the first flow characteristic providing unit 545 and the second flow characteristic providing unit 549 has the same structure as the flow characteristic providing unit 145 of the first embodiment, and can be formed by the same method.

The guide portion 550 is formed by, for example, processing the downstream end of the cylindrical member into a dome shape. The guide unit 550 guides the fluid flowing inside the fluid supply pipe 500 toward the center of the pipe so that the fluid is smoothly discharged through the outlet 112.

Then, in at least one of the plurality of protrusions 545p and 549p formed by arranging the first and second flow property providing portions 545 and 549 in a mesh pattern, a step is formed as in the first embodiment or a modification thereof. One or more are formed. Therefore, turbulence is more likely to occur in the fluid, increasing the efficiency of fluid diffusion, agitation or mixing. Further, a flow path having a small cross-sectional area is formed, the velocity of the fluid becomes high, the static pressure decreases, the occurrence of the cavitation phenomenon is promoted, and it becomes effective for the generation of fine bubbles. In addition, it is expected that the pressure loss of the fluid supply device will be reduced by increasing the flow rate of the flowing fluid as a whole, which will be more useful when the viscosity of the fluid is high.

In the present embodiment, the guide portion 550 of the internal structure 540 is formed by processing the downstream end portion of the cylindrical member into a dome shape, but it may have a conical shape or other shape. Alternatively, as in the second embodiment, the guide portion may be omitted. Further, the diameter of the circular cross section of the shaft body 541 of the internal structure 540 is the same in each portion in FIGS. 13A and 13B, but the diameter size of the shaft body of the first swirl generating portion 543 is large. , The diameter of the shaft body of the first flow characteristic providing portion 545 is smaller than the diameter of the shaft body of the second flow characteristic providing portion 545, and the diameter size of the shaft body of the second swirl generating portion 547 is the diameter of the shaft body of the second flow characteristic providing portion 549. It is also possible to make it smaller than the size of. Further, the number of spiral flow paths and the number of annular closed flow paths in the first flow characteristic providing unit 545 are set to the number of spiral flow paths and the number of annular closed flow paths in the second flow characteristic providing unit 549. (As a result, the size of the protrusion 545p of the first flow characteristic providing unit 545 becomes larger than the size of the protrusion 549p of the second flow characteristic providing unit 549, or the first flow. The size of the cross-sectional area of the flow path 545r of the characteristic providing unit 545 may be larger than the size of the cross-sectional area of the flow path 549r of the second flow characteristic providing unit 549).

In the above description of each embodiment, an example in which the fluid supply device of the present invention is mainly applied to a machine tool to discharge a coolant has been described, but the present invention can be applied to various applications for supplying a fluid. For example, it can be applied to a shower nozzle. In this case, if water or hot water having a predetermined temperature flows into the fluid supply device, the internal structure imparts the above-mentioned flow characteristics to the water and discharges the water, so that the cleaning effect can be improved. Alternatively, the present invention is also applicable to a fluid mixing device. In this case, if a plurality of types of fluids having different characteristics flow into the fluid supply device, the internal structure imparts the above-mentioned flow characteristics to the plurality of types of fluids, and the fluids are mixed and discharged. Furthermore, by using the present invention in a hydroponic cultivation apparatus, it can also be used to increase the dissolved oxygen in the supply water to maintain or increase the amount of oxygen in the water (dissolved oxygen concentration). In addition, for the pollutant removal device, a liquid containing a specific gas, for example, air or various gases (hydrogen, ozone, oxygen, etc.) dissolved in a liquid (for example, water) and further fine-bubbled. It can also be applied when supplied as (water).

Although the present invention has been described above using a plurality of embodiments, the present invention is not limited to such embodiments. A person having ordinary knowledge in the technical field to which the present invention belongs can derive many modifications and other embodiments of the present invention from the above description and related drawings. Although a plurality of specific terms are used in the present specification, they are used in a general sense only for the purpose of explanation and not for the purpose of limiting the invention. Various modifications are possible within the scope of the attached claims and the general concept and idea of the invention defined by their equivalents.

1 Grinding device 2 Grinding blade (grinding stone)
4 Grinding part W Work piece G Grinding point 5 Fluid supply part 6 Nozzle 7, 8 Joint part 9 Piping P, 100, 200, 300, 400,500 Fluid supply pipe 110 Pipe body 120 Inflow side member 130 Outflow side member 140, 1140, 240, 340, 540 Internal structure 141, 441, 461, 541 Shaft 145p, 1145p, 445p, 465p, 545p, 549p Protrusions 145r, 1145r, 445r, 465r, 545r, 549r Flow path 145p-d1, 1145 −D1, 1145-d2 Step 440 First internal structure 460 Second internal structure 142, 442, 542 Fluid diffusion part 143, 443, 463, 543, 547 Swirl generation part 145, 1145, 445, 465, 545 549 Flow characteristic providing unit 150, 350, 450, 470, 550 Induction unit

Claims (22)

It is a fluid supply device
With the storage body
The internal structure stored in the storage body and
Have,
The internal structure includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
Each of the plurality of protrusions is characterized in that at least one step is formed.
Fluid supply device. The shaft of the internal structure has a circular cross section and
The plurality of protrusions are formed by intersecting a spiral flow path that is connected in a spiral shape in which the circumference of the shaft portion is divided into a plurality of parts and a closed flow path that is divided into a plurality of parts in the longitudinal direction of the shaft portion. The fluid supply device according to claim 1, wherein at least one step is formed on the protrusion in parallel with the circumferential direction of the shaft portion. The fluid supply device according to claim 2, wherein the plurality of protrusions are formed with two or more steps parallel to the circumferential direction of the shaft portion. It is a fluid supply device
With the storage body
The internal structure stored in the storage body and
Have,
The storage body includes an inlet and an outlet, and includes an inlet and an outlet.
The internal structure includes a first portion and a second portion integrally formed on a common shaft portion having a circular cross section.
The first portion is located on the upstream side of the storage body when the internal structure is stored in the storage body, and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. Helix
The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
The plurality of protrusions of the second portion are formed by intersecting a spiral flow path that is connected in a spiral shape in which the circumference of the shaft portion is divided into a plurality of parts and a closed flow path that is divided into a plurality of parts in the longitudinal direction of the shaft portion. It is characterized in that at least one step is formed in each of the plurality of protrusions in parallel with the circumferential direction of the shaft portion.
Fluid supply device. The internal structure is located upstream of the first portion and further includes a fluid diffusing portion that diffuses the fluid flowing in through the inlet of the housing in the radial direction from the center and gives it to the first portion. The fluid supply device according to claim 4. The plurality of protrusions of the second portion of the internal structure are formed in a net shape, and each protrusion is a pillar shape having a substantially rhombic cross section, and is parallel to the circumferential direction of the shaft portion. The fluid supply device according to claim 4, wherein at least one step is formed. The fluid supply device according to claim 4, wherein the internal structure further includes a guiding portion for guiding the fluid toward the center at the downstream end portion. An internal structure that is housed in the storage body of the fluid supply device.
The internal structure includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
Each of the plurality of protrusions is characterized in that at least one step is formed.
Internal structure. The shaft of the internal structure has a circular cross section and
The plurality of protrusions are formed by intersecting a spiral flow path that is connected in a spiral shape in which the circumference of the shaft portion is divided into a plurality of parts and a closed flow path that is divided into a plurality of parts in the longitudinal direction of the shaft portion. The internal structure according to claim 8, wherein at least one step is formed in the protruding portion in parallel with the circumferential direction of the shaft portion. The internal structure according to claim 9, wherein the plurality of protrusions are formed with two or more steps parallel to the circumferential direction of the shaft portion. An internal structure that is housed in the storage body of the fluid supply device.
The internal structure includes a first portion and a second portion integrally formed on a common shaft portion having a circular cross section.
The first portion is located on the upstream side of the storage body when the internal structure is stored in the storage body, and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. Helix
The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
The plurality of protrusions of the second portion are formed by intersecting a spiral flow path that is connected in a spiral shape in which the circumference of the shaft portion is divided into a plurality of parts and a closed flow path that is divided into a plurality of parts in the longitudinal direction of the shaft portion. It is characterized in that at least one step is formed in each of the plurality of protrusions in parallel with the circumferential direction of the shaft portion.
Internal structure. It is a fluid supply device
Internal structure and
A storage body for storing the internal structure and
Including
The storage body includes an inlet and an outlet, and includes an inlet and an outlet.
The internal structure includes a first portion, a second portion, a third portion, and a fourth portion, which are integrally formed on a common shaft portion having a circular cross section.
The first portion is located on the upstream side of the storage body when the internal structure is stored in the storage body, and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. Helix
The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
The third portion is located downstream of the second portion and includes a shaft portion and a wing spirally formed to generate a spiral flow in the fluid.
The fourth portion is located downstream of the third portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
The plurality of protrusions of the fourth portion are characterized in that at least one step is formed parallel to the circumferential direction of the shaft portion.
Fluid supply device. The fluid supply device according to claim 12, wherein at least one step is formed in each of the plurality of protrusions of the second portion in parallel with the circumferential direction of the shaft portion. It is a fluid supply device
The first internal structure and
The second internal structure and
A storage body for storing the first internal structure and the second internal structure,
Including
The storage body includes an inlet and an outlet, and includes an inlet and an outlet.
The first internal structure includes a head portion and a body portion integrally formed on a common shaft portion having a circular cross section.
The head is located on the upstream side of the storage body when the first internal structure is stored in the storage body, and has a shaft portion and wings formed spirally so as to generate a spiral flow in the fluid. Includes
The body portion is located on the downstream side of the head portion, and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
The second internal structure in the form of a hollow shaft includes a head portion integrally formed on the hollow shaft portion and a body portion.
The head is located on the upstream side of the storage body when the second internal structure is stored in the storage body, and has a shaft portion and wings formed spirally so as to generate a spiral flow in the fluid. Includes
The body portion is located on the downstream side of the head portion, and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
At least a part of the first internal structure is housed in the hollow portion of the second internal structure.
Each of the plurality of protrusions of the body portion of the second internal structure is characterized in that at least one step is formed parallel to the circumferential direction of the shaft portion.
Fluid supply device. The fluid according to claim 14, wherein at least one step is formed in each of the plurality of protrusions of the body portion of the first internal structure in parallel with the circumferential direction of the shaft portion. Feeding device. The internal structure of the fluid supply device
It includes a first portion, a second portion, a third portion, and a fourth portion, which are integrally formed on a common shaft portion having a circular cross section.
The first portion is located on the upstream side of the storage body when the internal structure is stored in the storage body, and includes a shaft portion and a wing formed spirally so as to generate a spiral flow in the fluid. Helix
The second portion is located downstream of the first portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
The third portion is located downstream of the second portion and includes a shaft portion and a wing spirally formed to generate a spiral flow in the fluid.
The fourth portion is located downstream of the third portion and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
Each of the plurality of protrusions of the fourth portion is characterized in that at least one step is formed parallel to the circumferential direction of the shaft portion.
Internal structure. It is a combination of the first and second internal structures of the fluid supply device.
The first internal structure includes a head portion and a body portion integrally formed on a common shaft portion having a circular cross section.
The head is located on the upstream side of the storage body when the first internal structure is stored in the storage body, and has a shaft portion and wings formed spirally so as to generate a spiral flow in the fluid. Includes
The body portion is located on the downstream side of the head portion, and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
The second internal structure is in the form of a hollow shaft, and includes a head portion and a body portion integrally formed on the hollow shaft portion.
The head is located on the upstream side of the storage body when the second internal structure is stored in the storage body, and has a shaft portion and wings formed spirally so as to generate a spiral flow in the fluid. Includes
The body portion is located on the downstream side of the head portion, and includes a shaft portion and a plurality of protrusions protruding from the outer peripheral surface of the shaft portion.
At least a part of the first internal structure is housed in the hollow portion of the second internal structure.
Each of the plurality of protrusions of the body portion of the second internal structure is characterized in that at least one step is formed parallel to the circumferential direction of the shaft portion.
A combination of the first and second internal structures. A machine tool in which a coolant flows into a fluid supply device including the internal structure according to any one of claims 1 to 17 to give a predetermined flow characteristic, and then discharges the coolant to a tool or a workpiece to be cooled. .. A shower nozzle in which water or hot water is flowed into a fluid supply device including the internal structure according to any one of claims 1 to 17 to give a predetermined flow characteristic and then discharged to enhance the cleaning effect. A plurality of fluids having different characteristics are flowed into a fluid supply device including the internal structure according to any one of claims 1 to 17, and a predetermined flow characteristic is given, and the plurality of fluids are mixed and then discharged. Fluid mixer. A hydroponic cultivation device in which water flows into a fluid supply device including the internal structure according to any one of claims 1 to 17 to increase dissolved oxygen and then discharge the water. A pollutant removing device for flowing water in which a specific gas is dissolved into a fluid supply device including the internal structure according to any one of claims 1 to 17 and discharging the fine bubble-forming specific gas.

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