Spray head capable of generating spinning water jet and rotating speed adjusting method

Abstract

The invention discloses a spray head capable of generating spinning water jet and a rotating speed adjusting method thereof. The spray head comprises a spray head body, a speed regulator, a rotating body and two ball belts on the outer side of the rotating body. When the sprayer is used, water flow is sprayed out of the sprayer body and acts in the rotating body through the speed regulator, and the rotating assembly rotates automatically. Under the action of the rotating body, jet flow is ejected out along the axis and rotates around the axis at the same time, so that the jet flow has longitudinal impact force, reverse stripping force and transverse shearing force when impacting the target surface, and the impact effect is more concentrated. According to the spray head capable of generating the spinning water jet and the rotating speed adjusting method thereof, the water flow concentration ratio of the spray head is high, outlet water flow scattering is avoided, the water flow impact effect is remarkable, and the rotating speed of the spray head is adjusted to adapt to impact materials.

Description

Technical Field

[0001] The present invention relates to the technical field of nozzles, and in particular to a nozzle capable of generating a spinning water jet and a rotation speed regulating method. Background Art

[0002] High-pressure water erosion is often used to dismantle the upper materials of laminated components, remove rust layers on metal surfaces, and rinse the surface of objects.

[0003] Traditional direct high-pressure water gun jets can provide longitudinal impact force and reverse stripping force when performing the above work. However, due to the inability to accurately control the timing of adjusting the nozzle pressure during the operation, it may cause damage or destruction to the surface of the underlying material while completely removing the material, oxide layer, and dirt, which is extremely inconvenient.

[0004] To address the above problems, a method of using a jet to perform a conical pendulum motion has emerged. Its advantage is that it has a wide impact area and can achieve repeated grinding through rotation, thus meeting the working requirements. However, it also has many disadvantages:

[0005] (1) The jet performs a cone-shaped pendulum motion, and it often takes multiple flushings to completely cover the surface of the part.

[0006] (2) The jet moves in a cone-shaped pendulum motion, and it is impossible to accurately concentrate the jet flow for local impact.

[0007] (3) The speed is uncontrollable during cone pendulum motion. To change the speed, the only way is to replace the nozzle model, which is not very convenient.

[0008] (4) When performing cone pendulum motion, the water flow concentration is not high, and water flow scattering or even atomization will occur, affecting the impact effect.

[0009] Therefore, those skilled in the art provide a nozzle capable of generating a spinning water jet and a rotation speed adjustment method to solve the problems raised in the above background technology. Summary of the Invention

[0010] The technical problem to be solved by the present invention is: in order to solve the technical problems in the prior art, the present invention provides a nozzle that can generate a spinning water jet and a speed adjustment method thereof. The water flow of the nozzle has a high concentration, which avoids scattering of the outlet water flow, has a significant water flow impact effect, and adjusts its own speed to adapt to the impact material.

[0011] The technical solution adopted by the present invention to solve the technical problem is: a nozzle capable of generating a self-spinning water jet, comprising: a nozzle body, a nozzle shell, a speed regulator and a rotating body;

[0012] The bottom of the nozzle body is integrally connected to the extension tube body, and the internal thread of the nozzle body provided inside the nozzle body is used to cooperate with the external water supply pipeline to inject water;

[0013] The extended tube body is provided with two groups of water outlets, and the two groups of water outlets are distributed in a mirror image structure along the vertical axis of the nozzle body;

[0014] A speed regulator is installed on the outside of the extension tube at the bottom of the nozzle body, and the inner wall of the speed regulator is in clearance with the outer wall of the extension tube;

[0015] The outer ring of the nozzle body is equipped with a nozzle shell, and the cavity between the nozzle shell and the speed regulator is equipped with a rotating body;

[0016] The rotating body is integrally connected with the rotating body water outlet blades, the rotating body internal gear pieces, the rotating shell and the jet part;

[0017] The rotating shell is integrally connected to a plurality of sets of internal gears of the rotating body. The water flow supplied by the extended pipe body is ejected along the direction of the water outlet. The ejected directional water flow impacts the internal gears of the rotating body. The internal gears of the rotating body are used to drive the rotating shell to rotate by utilizing the power transmitted by the impact of the jet.

[0018] The rotating shell is integrally connected to the jet part, and the jet part is used to cooperate with the water outlet fan blades of the rotating body to complete the jet.

[0019] Furthermore, the speed regulator includes a housing and a spiral hole. The housing wall is provided with a spiral hole in an arc-shaped structure. The spiral hole is used to match the water outlet to control the water flow rate. Each group of water outlets has more than one water outlet, and each group of water outlets includes a first water outlet and a second water outlet.

[0020] The first and second water outlets have identical structures, with water flowing out in a tangential direction to the pipe wall. To adjust the required driving water flow rate for the rotating housing, the speed regulator uses a spiral hole design to limit the exposed position of the water outlet, thereby limiting the water flow rate and location. The water outlet location also affects the impact area of the jet from the rotating water outlet blades, thereby regulating the rotating speed.

[0021] Furthermore, during the water discharge process, only one of the first and second water outlet holes is exposed at the water outlet position of the spiral hole. In order to further demonstrate the influence of the water outlet position on the rotational speed of the jet impact area of the rotating body's water outlet blades, this application uses a structure in which only the first and second water outlet holes are exposed as a speed test comparison.

[0022] Furthermore, the top of the housing is integrally connected to the adjustment slider via a connecting arm, and the adjustment slider is embedded in a movable ring. The movable ring is clearance-matched with the extension of the external thread of the nozzle body. The bottom of the extension of the external thread of the nozzle body is provided with a rib, and the rib is in limited contact with the adjustment slider. In order to further improve the operability of the speed regulator, the present application synchronizes the adjustment slider with the housing, and further drives and controls the position of the adjustment slider to complete the adjustment of the water outflow from the second upper water outlet.

[0023] Furthermore, the adjustment slider is connected to the speed control button via a connecting rod, and a speed control button buckle is integrally extended from the outside of the speed control button. The buckle is designed to fix the position of the adjustment slider and the housing in real time, playing a positioning role.

[0024] Furthermore, the internal teeth of the rotating body are in the form of vertical plates fixedly mounted on the inner wall of the rotating shell. The internal teeth of the rotating body are provided with a guide arc surface and a horizontal surface. The guide arc surface is used for jet impact, and the usable area of the internal teeth of the rotating body gradually decreases from top to bottom. The guide arc surface is designed to increase the contact area of the jet impact surface. At the same time, the arc surface can also be used for diversion processing to improve the impact force effect. The design of the area of the internal teeth of the rotating body gradually decreasing from top to bottom is to adjust the size of the water flow impact area by controlling the jet position, thereby further limiting the rotation speed of the rotating body.

[0025] Furthermore, two sets of ball assemblies are installed on the outer wall of the rotating shell;

[0026] The ball assembly includes a ball belt and balls;

[0027] The ball belt has more than one set of balls evenly distributed along its body. Mounting sections are located along the belt's ball distribution points. Balls are mounted within holes in the center of these mounting sections, contacting the nozzle housing. The design of the ball belt and balls is intended to reduce friction between the rotating body and the nozzle housing, minimizing unnecessary wear and tear.

[0028] Furthermore, the nozzle shell and the nozzle body are threadedly connected, and a sealing ring is installed along the threaded connection position of the nozzle body, in order to improve the tightness between the nozzle shell and the nozzle body.

[0029] A nozzle capable of generating a self-spinning water jet, including a method for adjusting the rotation speed of the nozzle capable of generating a self-spinning water jet;

[0030] S1. The external water pipe is connected to the water supply of the nozzle body through a joint. Water flows through the nozzle body inlet into the extension tube body and is ejected through the water outlet. The water at the water outlet is ejected along the tangent line of the outer wall of the extension tube body. The ejected water flows into contact with the internal teeth of the rotating body.

[0031] S2, the water outlet portion includes a first water outlet hole and a second water outlet hole, and the first water outlet hole and the second water outlet hole are distributed vertically along the extended tube body;

[0032] Therefore, the first water outlet and the second water outlet are separately discharged through the spiral holes. The two sets of spiral holes are symmetrically arranged on the casing. When the casing rotates along the vertical axis of the nozzle body, the first water outlet or the second water outlet is separately exposed to ensure balanced impact of the water flow.

[0033] S3, the water flow ejected from the first water outlet or the second water outlet collides with the jet flow from the gear blades inside the rotating body;

[0034] Since the height of the water jetted from the first water outlet or the second water outlet is inconsistent, the internal gears of the rotating body adapted to the impact of the jets will also have inconsistent contact areas of the gears, resulting in inconsistent water pressure on the internal gears of the rotating body;

[0035] Among them, according to the formula of the force of water flow on the object:

[0036] F=ρAv 2

[0037] Including fluid density ρ, the effective area A of the gear blades inside the rotating body, and the fluid velocity v of the first water outlet or the second water outlet;

[0038] The fluid density is consistent during the jet impact process at the first water outlet or the second water outlet;

[0039] After the gears inside the rotating body are impacted by the jet, the kinetic energy is transferred to the rotating body for rotational motion by the force of the jet impact;

[0040] Because the heights of the first water outlet or the second water outlet are inconsistent, the rotational speeds of the rotating body driven by the jet impact of the first water outlet or the second water outlet are also inconsistent;

[0041] According to Bernoulli's equation:

[0042] (1 / 2)ρv 2 +P+ρgh=constant

[0043] Including fluid density ρ, fluid velocity v, fluid static pressure P, gravitational acceleration g and fluid height h;

[0044] As a comparison of the jet from the first or second outlet, the fluid height h can be recorded as zero, so the formula can be derived:

[0045]

[0046] Therefore, since the static pressure of the jets of the first water outlet and the second water outlet both come from the supply fluid inside the extended tube body, under the same jet static pressure P, the fluid velocity v can be adjusted by changing the effective area A of the gear blades inside the rotating body. Finally, abaqus is used for simulation verification to obtain the rotational speed of the rotating body.

[0047] Furthermore, the rotation speed of the rotating body according to step S3 is affected by the friction between the rotating body and the housing, as well as the size of the hole of the water outlet;

[0048] Therefore, the ball assembly is used as a mounting structure to reduce friction; the friction calculation formula is:

[0049] F 滑动 =B 滑动 ×N;

[0050] F 滚动 =C rr ×N;

[0051] In the above formula, μ 滑动 is the coefficient of sliding friction, N is the positive pressure; C rr is the rolling resistance coefficient;

[0052] Therefore, by obtaining the sliding friction coefficient of the ball and the inner wall of the nozzle shell, and then obtaining the water flow pressure of the rotating body as the positive pressure, the comparative value of the ball assembly reducing friction can be obtained;

[0053] The size of the jet flow can be adjusted by rotating the spiral hole and the housing, while the size of the exposed water outlet can be adjusted by rotating the housing. Therefore, the pitch of the spiral hole can be changed with the length of the speed regulator, and the width can be changed with the size of the water outlet; according to the formula:

[0054]

[0055] Among them, Q is the water output, d is the pitch of the spiral hole, P is the jet static pressure, and ρ is the fluid density; therefore, the water output Q can be obtained by obtaining the parameters.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] 1. In the nozzle design of the present invention, the water flow is highly concentrated and there is no water flow scattering at the outlet, thereby improving the water flow impact effect and eliminating the need for repeated grinding operations on a certain area.

[0058] 2. The present invention has a ball belt between the rotating body and the outer shell, which greatly reduces the friction between the rotating body and the inner wall.

[0059] 3. The jet is ejected along the axis and spins around the axis at the same time, so that when the jet hits the target surface, it has longitudinal impact force, reverse stripping force, and lateral cutting force at the same time, and the impact effect is more concentrated. The surface material, oxide layer and dirt can be removed at a lower pressure without damaging the underlying material. In addition, due to the high-speed spin, the tangential momentum of the splashed water flow is still large, which plays a removal role.

[0060] 4. Compared with the cone-shaped pendulum jet, the water flow is ejected along the axial direction, and the position of the jet impact can be precisely controlled.

[0061] 5. The jet speed is controllable. It can be flexibly adjusted according to the thickness of different materials without changing the nozzle. It can accurately remove neglected or stubborn materials while protecting the surface of the parts. The part with thick surface material rotates at a high speed, and the part with thin surface material rotates at a low speed, so as to achieve material removal while protecting the underlying material. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The present invention will be further described below with reference to the accompanying drawings and examples.

[0063] Figure 1 This is a schematic diagram of the appearance structure of the nozzle that can generate a spinning water jet and has an adjustable speed;

[0064] Figure 2 This is a rear view of a nozzle that can generate a spinning water jet and has an adjustable speed, and a schematic diagram of its A-A cross-sectional structure;

[0065] Figure 3 This is a schematic diagram of the assembly of the speed regulator and the nozzle body and its BB cross-sectional structure when the nozzle is in high gear and can generate a self-spinning water jet and has an adjustable speed;

[0066] Figure 4 This is a schematic diagram of the assembly of the speed regulator and the nozzle body and its C-C cross-sectional structure when the nozzle is capable of generating a self-spinning water jet and has an adjustable speed and is in low speed gear;

[0067] Figure 5 It is the main view of the assembly of the speed regulator, the nozzle body and the rotating body and its D-D cross-sectional structure diagram;

[0068] Figure 6 yes Figure 5 Schematic diagram of the E-E and F-F cross-section structures;

[0069] Figure 7 It is the main view of the rotating body and the two ball belt assemblies and their G-G cross-sectional view;

[0070] Figure 8 yes Figure 7 Middle H-H section view;

[0071] Figure 9This is the abaqus simulation diagram when water is flowing out of the first outlet;

[0072] Figure 10 This is the abaqus simulation diagram when water is flowing out of the second water outlet;

[0073] Figure 11 These are the abaqus simulation results of three different nozzle erosion effects.

[0074] In the figure: 1. Nozzle body; 103. First water outlet; 104. Second water outlet; 105. Extension tube; 2. Nozzle shell; 3. Speed regulator; 301. Spiral hole; 302. Sleeve; 4. Rotating body; 401. Internal gears of rotating body; 401-1. Flow guide arc surface; 401-2. Horizontal plane; 402. Water outlet pipe blades of rotating body; 403. Rotating shell; 404. Jet part; 5. Adjusting slider; 6. Ball belt; 601. Mounting part; 7. Ball; 15. Sealing ring; 16. Speed control button; 17. Speed control button buckle. DETAILED DESCRIPTION

[0075] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0076] The working principle of a nozzle that can generate a spinning water jet according to the present invention is as follows: the present invention provides a speed-adjustable nozzle that can rotate after the water jet is ejected, comprising a nozzle body, a speed regulator, a rotating body, and two ball belts on the outside of the rotating body. When the nozzle is used, water flows out from the nozzle body, acts on the inside of the rotating body through the speed regulator, and realizes the rotation of the rotating component. Under the action of the rotating body, the jet is ejected along the axis and spins around the axis at the same time, so that when the jet hits the target surface, it has longitudinal striking force, reverse peeling force, and lateral shear force at the same time, and the impact effect is more concentrated. The design of the present application has the ability to remove surface materials, rust, and dirt on objects, and can adjust the rotation speed according to the thickness of the materials, rust, and dirt to protect the underlying materials.

[0077] The nozzle body 1 is connected to the water pipe, and water can be ejected through the first water outlet hole 103 or the second water outlet hole 104 on the pipe wall. The water outlet direction is not radial, but tangential to the inner wall of the water outlet. The tangential water flow will exert a tangential force on the rotating body 4, thereby driving the rotating body 4 to spin.

[0078] A groove is provided on the nozzle shell 2, and a speed control button 16 is installed on the outside of the nozzle to control the speed. The nozzle shell 2 and the nozzle body 1 are fastened by threads, and the design of the sealing ring 15 improves the tightness of the connection between the nozzle shell 2 and the nozzle body 1. There is a ball belt 6 between the rotating body 4 and the outer wall. Each ball belt has four free balls, and there are two ball belts 6 with different diameters in the upper and lower parts, which can not only reduce friction but also prevent the rotating body from shaking inside the nozzle. There are six blades 402 inside the water outlet pipe of the rotating body 4. When the water flows between the blades 402, due to the self-rotation of the rotating body 4, the water jet is ejected along the axis and rotates around the jet axis at the same time;

[0079] Rotation around the jet axis specifically refers to the jet rotating around its own axis, rather than rotating in a cone-shaped pendulum.

[0080] like Figures 1 to 11 FIG. 1 is a preferred embodiment of the present invention. A nozzle capable of generating a self-spinning water jet in this embodiment comprises: a nozzle body 1, a nozzle housing 2, a speed regulator 3 and a rotating body 4;

[0081] The bottom of the nozzle body 1 is integrally connected to the extension tube 105. The nozzle body internal thread 101 provided inside the nozzle body 1 is used to cooperate with the external water supply pipeline to inject water;

[0082] The extended tube body 105 is provided with two groups of water outlets, and the two groups of water outlets are distributed in a mirror image structure along the vertical axis of the nozzle body 1;

[0083] A speed regulator 3 is installed outside the extension tube 105 at the bottom of the nozzle body 1, and the inner wall of the speed regulator 3 is in clearance with the outer wall of the extension tube 105;

[0084] The outer ring of the nozzle body 1 is equipped with a nozzle shell 2, and the cavity between the nozzle shell 2 and the speed regulator 3 is equipped with a rotating body 4;

[0085] The rotating body 4 is integrally connected with the rotating body water outlet blade 402, the rotating body internal gear piece 401, the rotating shell 403 and the jet part 404;

[0086] Multiple sets of internal rotating body gears 401 are integrally connected to the rotating shell 403. The water supplied by the extension tube 105 is ejected along the direction of the water outlet. The ejected directional water flow impacts the internal rotating body gears 401. The internal rotating body gears 401 are used to use the power transmitted by the impact of the jet to drive the rotating shell 403 to rotate.

[0087] The rotating shell 403 is integrally connected to the jet portion 404 , and the jet portion 404 is used to cooperate with the rotating body water outlet fan blades 402 to complete the jet.

[0088] The nozzle housing 2 is threadedly connected to the nozzle body external thread 102 via the inner wall internal thread, and the nozzle body 1 is installed with a sealing ring 15 along the threaded connection position.

[0089] Example 1:

[0090] In this embodiment, there are two speed gears. In the high speed gear, water is ejected from the first water outlet 103 of the nozzle body, impacting the upper part of the rotating body's gears, driving the rotating body 4 to rotate. The rotating body relies on the two outer ball belts to achieve stable rotation while reducing friction with the outer shell. After passing through the internal gears 401 of the rotating body, the water flows into the water outlet pipe and is driven by the rotating body's water outlet blades 402 to achieve simultaneous self-spin while being ejected around the axis. The low speed gear is similar, but in this state, the speed regulator 3 covers the first water outlet 103 of the nozzle body 1, and water flows out of the second water outlet 104, impacting the lower part of the gears, and the rotating body rotates more slowly.

[0091] The speed regulator 3 includes a housing 302 and a spiral hole 301. The wall of the housing 302 is provided with an arc-shaped spiral hole 301. The spiral hole 301 is used to match the water outlet to control the water flow rate. Each water outlet group has more than one water outlet hole, and each water outlet group includes a first water outlet hole 103 and a second water outlet hole 104. The first water outlet hole 103 and the second water outlet hole 104 have the same structure, and the water outlet direction of the first water outlet hole 103 and the second water outlet hole 104 is tangential to the pipe wall. During the water outlet process, only one of the first water outlet hole 103 and the second water outlet hole 104 is exposed at the water outlet position of the spiral hole 301.

[0092] In this embodiment, two groups of water outlet holes are selected at extreme positions: a first water outlet hole 103 and a second water outlet hole 104. These two groups of water outlet holes are used as a comparison to the high and low water outlet positions of the structure of the present application. The difference in the impact area of the water outlet at the high and low positions can be used to show the speed difference of the rotating body 4 during rotation, which is adjusted by the position of the water outlet holes.

[0093] like Figure 9 and Figure 10 Both sets of images are derived from Abaqus simulations. In this simulation, the ring structure served as the rotating body 4, while the internally connected plate structure served as the impact surface of the internal teeth 401 at different locations within the rotating body. The local structures of the internal teeth 401 shown in these two sets of images correspond to the jet locations of the first and second water outlets 103 and 104, respectively.

[0094] The simulation data is shown in Table 1:

[0095] Table 1

[0096]

[0097] Description of the first water outlet 103 and the second water outlet 104:

[0098] The limit position of the first water outlet 103 and the second water outlet 104 refers to the maximum spacing between the upper and lower water outlets opened by the extension tube 105 of the present application, and the maximum spacing size is matched by the longitudinal height size of the gear piece 401 inside the rotating body.

[0099] At the same time, the design of the water outlet hole is not limited to the upper and lower sets of holes. The empty position design mentioned in this application is only used as a preferred solution for comparison. When the water outlet hole is turned into a groove, the speed can be infinitely adjusted by changing the speed regulator angle with the help of the spiral hole 301.

[0100] Example 2:

[0101] The top of the housing 302 is integrally connected to the adjustment slider 5 via a connecting arm. The adjustment slider 5 is embedded in a movable ring 8, which has a clearance fit with the extension of the nozzle body's external thread 102. The bottom of the extension of the nozzle body's external thread 102 is provided with a rib, which contacts the adjustment slider 5 in a limited position. The adjustment slider 5 is connected to the speed control button 16 via a connecting rod. The speed control button 16 has a speed control button buckle 17 extending integrally from the outside.

[0102] This application uses an adjusting slider 5 and a movable ring 8 as basic synchronous moving components. The adjusting slider 5 is synchronously connected to the movable ring 8 as an embedded mounting structure, and the adjusting slider 5 can be rotated and adjusted in conjunction with the speed control button 16. During the rotation adjustment process, the speed control button buckle 17 can be positioned to avoid the impact of the jet driving the shell 302 to rotate.

[0103] Example 3:

[0104] The internal gear piece 401 of the rotating body 4 is a vertical plate-shaped structure fixedly installed on the inner wall of the rotating shell 403. The rotating internal gear piece 401 is provided with a guide arc surface 401-1 and a horizontal surface 401-2. The guide arc surface 401-1 is used for jet impact. The use area of the rotating internal gear piece 401 gradually decreases from top to bottom.

[0105] In this embodiment, the end surfaces of the internal gear blades 401 of the rotating body are designed as a flow-guiding arc surface 401-1 and a horizontal surface 401-2. The flow-guiding arc surface 401-1 serves as the impact contact surface for the jet, increasing the contact area of the jet and improving the rotational transmission effect. The horizontal surface 401-2 is designed for easier machining.

[0106] In the present design, the horizontal surface 401 - 2 may also be a convex conical surface structure, an outwardly convex arc surface structure, or a slope surface structure.

[0107] The guide arc surface 401 - 1 can also be designed as a multi-point concave structure or a multi-point convex structure.

[0108] Furthermore, the area of the gears 401 inside the rotating body can be varied within a reasonable range, thereby achieving a wider range of speed changes. This reasonable range refers to the reasonable size of the internal dimensions of the rotating housing 403.

[0109] Moreover, the number of the teeth 401 inside the rotating body can be between 4 and 6, and the shape can be spiral blades or rectangular blades. Changing the number and shape of the blades can change the jet helicity to adapt to more working conditions.

[0110] The height of the outer wall of the rotating body 4 is not unique, and no water flows into the nozzle shell cavity, which saves water resources and has a greater water pressure.

[0111] Example 4:

[0112] Two sets of ball 7 assemblies are installed on the outer wall of the rotating shell 403;

[0113] The ball 7 assembly includes a ball belt 6 and balls 7;

[0114] There are more than one group of balls 7 evenly distributed on the ball belt 6. The ball belt 6 is provided with a mounting portion 601 along the distribution position of the balls 7. The balls 7 are installed in the hole provided in the center of the mounting portion 601. The balls 7 are in contact with the nozzle housing 2.

[0115] In order to reduce friction when installed in any small rotating device that cannot be installed with a bearing, the number of balls in each ball belt can be 4 or 5, and the ball diameter is not unique.

[0116] Example 5:

[0117] A nozzle capable of generating a self-spinning water jet, including a method for adjusting the rotation speed of the nozzle capable of generating a self-spinning water jet;

[0118] S1. The external water pipe is connected to the water supply of the nozzle body 1 through a joint. Water flows through the inlet of the nozzle body 1 into the extension tube body 105 and is ejected through the water outlet. The water at the water outlet is ejected along the tangent line of the outer wall of the extension tube body 105. The ejected water flows into contact with the internal gear blades 401 of the rotating body.

[0119] S2, the water outlet portion includes a first water outlet hole 103 and a second water outlet hole 104, and the first water outlet hole 103 and the second water outlet hole 104 are distributed in a hole-like structure along the extension tube body 105;

[0120] Therefore, the first water outlet 103 and the second water outlet 104 are separately discharged through the spiral holes 301. The two sets of spiral holes 301 are symmetrically arranged on the casing 302. When the casing 302 rotates along the vertical axis of the nozzle body 1, the first water outlet 103 or the second water outlet 104 is separately exposed to ensure balanced impact of the water flow.

[0121] S3, the water flow ejected from the first water outlet 103 or the second water outlet 104 collides with the jet flow from the gear blades 401 inside the rotating body;

[0122] Since the height of the water jetted from the first water outlet 103 or the second water outlet 104 is inconsistent, the internal gear pieces 401 of the rotating body adapted to the impact of the jets will also have inconsistent contact areas with the gear pieces, resulting in inconsistent water pressure on the internal gear pieces 401 of the rotating body. The area variation range of the internal gear pieces 401 of the rotating body is variable, which can achieve a wider range of speed changes.

[0123] Among them, according to the formula of the force of water flow on the object:

[0124] F=ρAv 2

[0125] Including fluid density ρ, the effective area A of the gear blades 401 inside the rotating body, and the fluid velocity v of the first water outlet 103 or the second water outlet 104;

[0126] The fluid density is consistent during the jet impact process of the first water outlet 103 or the second water outlet 104;

[0127] After the gears 401 inside the rotating body are impacted by the jet, the kinetic energy is transferred to the rotating body 4 by the force of the jet impact to rotate;

[0128] Because the heights of the first water outlet 103 or the second water outlet 104 are inconsistent, the rotation speeds of the rotating body 4 driven by the impact of the jets from the first water outlet 103 or the second water outlet 104 are also inconsistent;

[0129] According to Bernoulli's equation:

[0130] (1 / 2)ρv 2 +P+ρgh=constant

[0131] Including fluid density ρ, fluid velocity v, fluid static pressure P, gravitational acceleration g and fluid height h;

[0132] As a comparison of the jet from the first water outlet 103 or the second water outlet 104, the fluid height h can be recorded as zero, so the formula can be derived:

[0133]

[0134] Therefore, since the jet static pressures of the first water outlet (103) and the second water outlet 104 both come from the supply fluid inside the extension tube body 105, under the same jet static pressure P, the fluid velocity v can be adjusted by changing the effective area A of the gear blades 401 inside the rotating body. Finally, abaqus is used to perform simulation verification to obtain the rotational speed of the rotating body 4.

[0135] In this embodiment, the portion of the rotating body with teeth has an inner diameter of 18 mm at the upper end, an inner diameter of 14 mm at the lower end, and a height of 16 mm. The surface of the teeth facing the impact of the water flow is 2 mm long at the upper end and becomes zero at the lower end, and is 16 mm high. Obviously, when water flows out of the first water outlet 103, the area of the teeth affected is large, and when water flows out of the second water outlet 104, the area of the teeth affected is small. According to the formula of the force of water flow on an object, F = ρAv 2 ;

[0136] Since the diameter of the water outlet is the same, the flow velocity v is the same. Therefore, the force of the jet acting on the upper end of the tooth plate 401 is greater, and the force acting on the lower end of the tooth plate 401 is smaller. By adjusting the speed regulator 3, the position of the spiral hole 302 on the speed regulator also changes, thereby changing the water outlet of the nozzle body (1) in operation. Thus, the purpose of speed change is achieved. The diameter of the water outlet is 1mm. Assuming that the fluid is pressurized to 20Mpa and enters the nozzle, according to the Bernoulli equation: (1 / 2)ρv 2 +P+ρgh=constant. Since the height term can be ignored in this problem, we have Substituting a pressure of 20 MPa, the flow rate at both the upper water hole 103 and the second water outlet 104 is 200.65 m / s. Based on this, finite element simulations were performed using Abaqus for the flow of water from the first water outlet 103 and the second water outlet 104. The simulation results show that the rotational speed of the rotating body 4 is 925 r / s when water is flowing from the first water outlet 103, and 521 r / s when water is flowing from the second water outlet 104. For ease of calculation, the rotating body 4 is simplified as a ring during the simulation. The speed difference here only demonstrates the significant speed difference caused by the water impacting the upper and lower parts of the gears and does not represent the actual operating speed.

[0137] Example 6:

[0138] The rotation speed of the rotating body 4 according to step S3 is affected by the friction between the rotating body and the housing, as well as the size of the hole of the water outlet;

[0139] Therefore, the ball 7 assembly is used as a mounting structure to reduce friction; the friction calculation formula is: F 滑动 =μ 滑动 ×N;

[0140] F 滚动 =C rr ×N;

[0141] In the above formula, μ 滑动 is the coefficient of sliding friction, N is the positive pressure; C rr is the rolling resistance coefficient;

[0142] Therefore, by obtaining the sliding friction coefficient of the ball 7 and the inner wall of the nozzle housing 2, and then obtaining the water flow pressure of the rotating body as the positive pressure, the comparative value of the friction reduction of the ball 7 assembly can be obtained;

[0143] The size of the jet flow rate of the water outlet hole can be adjusted by rotating the spiral hole 301 in conjunction with the housing 302, and the size of the water outlet exposure needs to be adjusted by rotating the housing 302. Therefore, the pitch of the spiral hole 301 can be changed with the length of the speed regulator, and the width can be changed with the size of the water outlet hole; according to the formula:

[0144]

[0145] Among them, Q is the water output, d is the pitch of the spiral hole 301, P is the jet static pressure, and ρ is the fluid density; therefore, the water output Q can be obtained by obtaining the parameters.

[0146] In this embodiment, in order to reduce friction in any small rotating device that cannot be installed with a bearing, the number and diameter of each ball belt 6 and ball 7 are not unique. In this example, four balls are used. When there are no free balls, the rotating body is unstable, and the friction between the rotating body and the housing is static friction. The friction force calculation formula is F 滑动 =μ 滑动 ×N, where μ 滑动 is the coefficient of sliding friction, N is the positive pressure, and the sliding friction coefficient between plastic and metal is usually between 0.15 and 0.3, depending on the material properties. Assume that the positive pressure is provided entirely by the deadweight of the rotating body and the water flow. When there is a ball, the friction force is calculated as F 滚动 =c rr ×N its C rr Where is the rolling resistance coefficient, N is the positive pressure, and the rolling resistance coefficient is generally between 0.003 and 0.005. Since the positive pressure is entirely provided by the weight of the rotating body and the water flow, and the rolling resistance coefficient is smaller than the sliding resistance coefficient, the friction between the rotating body and the housing when there are balls is obviously smaller than when there are no balls.

[0147] The pitch of the spiral hole 301 on the speed regulator 3 can be changed with the length of the speed regulator, and the width can be changed with the size of the water outlet. In this example, the pitch of the spiral hole is 98mm, the number of turns is 0.11, the coverage length is 10mm, and the width is 1mm. If the number of turns remains unchanged, the coverage length of the spiral hole is reduced by reducing the pitch. For example, when the pitch becomes 50mm, the coverage length is 5.3mm, and the adjustable speed range is reduced. If the width of the spiral hole is changed, the water output will change accordingly.

[0148] Here, in order to further test the effect of the nozzle structure of the present application, the simulation results are listed in Table 2:

[0149] Table 2

[0150]

[0151] like Figure 11 As shown in the figure, the three sets of nozzle erosion images are test results obtained through simulation.

[0152] In summary:

[0153] like Figure 1 -2 shows the overall structure of the nozzle. The speed regulator is mounted on the nozzle body 1, with the rotating body 4 below. The rotating body 4 is composed of an upper ball belt 5 and a lower ball belt 6 on the outside. The speed control button 16 is internally installed on the speed regulator 3, and the buckle 17 can be stuck on the housing 2 to prevent the speed regulator 3 from rotating under the action of water flow.

[0154] like Figure 2 -3, respectively, are the working states of the top first water outlet 103 and the bottom second water outlet 104. By rotating the speed regulator 3, only the top or bottom water outlet is allowed to discharge water at a certain moment.

[0155] like Figure 5 As shown in FIG. 6 , when water flows out of the first water outlet 103, it impacts the upper portion of the rotor 4. When water flows out of the second water outlet 104, it impacts the lower portion of the rotor 4. Because the area of the internal teeth 401 of the rotor gradually decreases from top to bottom, the rotational speed is high when the first water outlet 103 flows out, while the rotational speed is low when the second water outlet 104 flows out. Because the rotor outlet pipe blades 402 are located within the outlet portion 404 below the rotor, they drive the water to spin around its axis. Due to inertia, the water flow maintains this rotational state after being ejected axially.

[0156] like Figure 7 As shown in FIG8 , there are two sets of upper and lower ball belts 6 on the outside of the rotating body 4. The ball belts constrain the rotating body 4 in the nozzle, preventing it from shaking radially and sliding downward longitudinally, but allowing it to rotate and greatly reducing the friction caused by the rotation.

[0157] The above description is intended to serve as a guide for the preferred embodiments of the present invention. Based on the above description, relevant personnel are fully capable of making various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the contents of the specification and must be determined according to the scope of the claims.

Claims

1. A nozzle capable of generating a spinning water jet, characterized in that: include: A nozzle body (1), a nozzle housing (2), a speed regulator (3) and a rotating body (4); The bottom of the nozzle body (1) is integrally connected to the extension tube body (105), and the nozzle body (1) is used to cooperate with an external water supply pipeline to inject water; The extension tube body (105) is provided with two groups of water outlets, and the two groups of water outlets are distributed in a mirror image structure along the vertical axis of the nozzle body (1); A speed regulator (3) is installed outside the extension tube (105) at the bottom of the nozzle body (1), and the inner wall of the speed regulator (3) is clearance-matched with the outer wall of the extension tube (105); The outer ring of the nozzle body (1) is provided with a nozzle housing (2), and a rotating body (4) is provided in the cavity between the nozzle housing (2) and the speed regulator (3); The rotating body (4) is integrally connected with a rotating body water outlet blade (402), a rotating body internal tooth piece (401), a rotating shell (403) and a jet part (404); The rotating shell (403) is integrally connected with a plurality of sets of internal rotating body teeth (401). The water flow supplied by the extension tube (105) is ejected along the direction of the water outlet. The ejected directional water flow impacts the jet of the internal rotating body teeth (401). The internal rotating body teeth (401) are used to drive the rotating shell (403) to rotate by utilizing the power transmitted by the jet impact. The rotating shell (403) is integrally connected to the jet portion (404), and the jet portion (404) is used to cooperate with the rotating body water outlet fan blade (402) to complete the jet.

2. A nozzle capable of generating a spinning water jet according to claim 1, characterized in that: The speed regulator (3) comprises a casing (302) and a spiral hole (301); the casing (302) is provided with a spiral hole (301) in an arc-shaped structure on its wall; the spiral hole (301) is used to match the water outlet to control the water outlet flow rate.

3. A nozzle capable of generating a spinning water jet according to claim 1, characterized in that: Each group of the water outlet parts includes a first water outlet hole (103) and a second water outlet hole (104); The first water outlet hole (103) and the second water outlet hole (104) have the same structure, and the water outlet direction of the first water outlet hole (103) and the second water outlet hole (104) is the tangential direction of the pipe wall; During the water outlet process, one and only one of the first water outlet hole (103) and the second water outlet hole (104) is exposed to the water outlet position of the spiral hole (301).

4. A nozzle capable of generating a spinning water jet according to claim 1, characterized in that: The top of the housing (302) is integrally connected to the adjusting slider (5) via a connecting arm. The adjusting slider (5) is embedded in a movable ring (8). The movable ring (8) is clearance-matched with the extension of the external thread (102) of the nozzle body. A retaining edge is provided at the bottom of the extension of the external thread (102) of the nozzle body. The retaining edge is in limiting contact with the adjusting slider (5).

5. The nozzle capable of generating a spinning water jet according to claim 5, characterized in that: The regulating slider (5) is connected to the speed control push button (16) via a connecting rod, and a speed control push button buckle (17) is integrally extended from the outer side of the speed control push button (16).

6. A nozzle capable of generating a spinning water jet according to claim 1, characterized in that: The rotating body internal gear piece (401) is in a vertical plate-shaped structure and is fixedly mounted on the inner wall of the rotating shell (403). The rotating internal gear piece (401) is provided with a flow-guiding arc surface (401-1) and a horizontal surface (401-2). The flow-guiding arc surface (401-1) is used for jet impact. The use area of the rotating internal gear piece (401) gradually decreases from top to bottom.

7. The nozzle capable of generating a spinning water jet according to claim 1, characterized in that: Two sets of ball (7) assemblies are installed on the outer wall of the rotating shell (403); The ball assembly comprises a ball belt (6) and balls (7); At least one group of balls (7) is evenly distributed on the ball belt (6), and a mounting portion (601) is provided on the ball belt (6) along the distribution position of the balls (7). The balls (7) are installed in a hole provided in the center of the mounting portion (601), and the balls (7) are in contact with the nozzle housing (2).

8. The nozzle capable of generating a spinning water jet according to claim 1, characterized in that: The nozzle housing (2) is threadedly connected to the nozzle body (1), and a sealing ring (15) is installed on the nozzle body (1) along the threaded connection position.

9. A method for adjusting the rotation speed of a nozzle capable of generating a spinning water jet, characterized in that: A nozzle capable of generating a spinning water jet according to any one of claims 1 to 8; The method for adjusting the rotation speed of the nozzle capable of generating a spinning water jet comprises the following steps: S1. The external water pipe is connected to the nozzle body (1) through a joint for water supply. Water flows along the inlet of the nozzle body (1) into the interior of the extension tube body (105) and is ejected through the water outlet. The water flow of the water outlet is ejected along the tangent line of the outer wall of the extension tube body (105). The ejected water flow impacts and contacts the internal gear pieces (401) of the rotating body. S2, the water outlet portion comprises a first water outlet hole (103) and a second water outlet hole (104), the first water outlet hole (103) and the second water outlet hole (104) being arranged in a vertically distributed hole structure along the extension tube body (105); The first water outlet (103) and the second water outlet (104) discharge water separately through the spiral hole (301). The two groups of spiral holes (301) are symmetrically arranged on the casing (302). When the casing (302) rotates along the vertical axis of the nozzle body (1), the first water outlet (103) or the second water outlet (104) is exposed separately to ensure balanced impact of the water flow. The balanced impact of the water flow ensures that the rotating body (4) is subjected to uniform rotation force. S3, the water flow ejected from the first water outlet (103) or the second water outlet (104) collides with the jet flow of the gear blades (401) inside the rotating body; The height of the water flow ejected from the first water outlet (103) or the second water outlet (104) is inconsistent, and the internal gear pieces (401) of the rotating body adapted to the impact of the jets will also be inconsistent due to the inconsistent contact areas of the gear pieces, resulting in inconsistent water flow pressure on the internal gear pieces (401) of the rotating body; Among them, according to the formula of the force of water flow on the object: F=ρAv 2 In the above formula, the fluid density ρ, the effective area A of the gear blade (401) inside the rotating body, and the fluid velocity v of the first water outlet (103) or the second water outlet (104); wherein the fluid density is consistent during the jet impact process of the first water outlet (103) or the second water outlet (104); After the gears (401) inside the rotating body are impacted by the jet, the kinetic energy is transferred to the rotating body (4) by the force of the jet impact, causing the rotating body (4) to rotate; The heights of the first water outlet (103) or the second water outlet (104) are inconsistent, resulting in inconsistent rotational speeds of the rotating body (4) driven by the impact of the jet from the first water outlet (103) or the second water outlet (104); According to Bernoulli's equation: (1 / 2)ρv 2 + P + ρgh = constant In the above formula, fluid density ρ, fluid velocity v, fluid static pressure P, gravitational acceleration g and fluid height h; As a comparison of the jet from the first water outlet (103) or the second water outlet (104), the fluid height h can be recorded as zero, so the following formula can be derived: The static pressure of the jets of the first water outlet (103) and the second water outlet (104) are both derived from the supply fluid inside the extension tube (105). Under the same static pressure P of the jets, the fluid velocity v is adjusted by changing the effective area A of the toothed blades (401) inside the rotating body. Finally, a simulation calculation is performed using Abaqus to obtain the rotational speed of the rotating body (4).

10. The method for adjusting the rotation speed of a nozzle capable of generating a spinning water jet according to claim 9, characterized in that: The rotation speed of the rotating body (4) according to step S3 is affected by the friction between the rotating body and the housing, as well as the size of the hole of the water outlet; The ball assembly is used as a mounting structure to reduce friction; the friction calculation formula is: F 滑动 =μ 滑动 ×N; F 滚动 =C rr ×N In the above formula, μ 滑动 is the coefficient of sliding friction, N is the positive pressure; C rr is the rolling resistance coefficient; By obtaining the sliding friction coefficient of the ball (7) and the inner wall of the nozzle housing (2), and then obtaining the water flow pressure of the rotating body as the positive pressure, a comparative value of the friction reduction of the ball assembly can be obtained; The size of the jet flow rate can be adjusted by rotating the spiral hole (301) in conjunction with the housing (302). The size of the exposed water outlet can be adjusted by rotating the housing (302). The pitch of the spiral hole (301) can be changed with the length of the speed regulator, and the width can be changed with the size of the water outlet. According to the formula: In the above formula, Q is the water output, d is the pitch of the spiral hole (301), P is the jet static pressure, and ρ is the fluid density; therefore, the water output Q can be obtained by obtaining the parameters.

Images