Hydraulic driving device and hydraulic fan

Abstract

The hydraulic driving device comprises a pump body, a pump cover, a hydraulic impeller and a pump shaft, the pump body is provided with a first cavity, the first cavity is provided with an axial first opening, and the cavity wall of the first cavity is provided with a water inlet and a water outlet; the hydraulic impeller is rotatably arranged in the first cavity, and the hydraulic impeller and the first cavity are coaxially arranged; the hydraulic impeller comprises a first impeller body and first blades; the extending direction of the water inlet is perpendicular to the radial direction of the highest point of the hydraulic impeller, and the center height of the water inlet is located at the one-fourth position to the one-second position of the first blade rotating to the highest point from outside to inside. The height of the lower end of the water outlet is located at a quarter-to-half position of the first blade rotating to the lowest point from outside to inside, and the height of the upper end of the water outlet is not higher than the height of the center of the hydraulic impeller. The hydraulic driving device and the hydraulic fan have the advantages that the energy utilization rate is high on the whole, and the hydraulic driving device and the hydraulic fan are a hydraulic energy conversion mode suitable for high water head and ultra-low flow.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic applications, in particular to a hydraulic driving device and a hydraulic fan. Background Art

[0002] In the prior art, hydraulic working devices usually require high-head and large-flow water inflow as input power. Especially for traditional centrifugal impeller-type hydraulic driving devices, the energy conversion efficiency for small-flow and high-head hydraulic sources is relatively low. Summary of the Utility Model

[0003] An object of the present application is to provide a hydraulic driving device and a hydraulic fan with high energy utilization rate for small-flow and high-head hydraulic sources.

[0004] The technical solution adopted by the present application is as follows: A hydraulic driving device includes:

[0005] A pump body having a first cavity with a circular cross-section. The first cavity is provided with an axial first opening, and the cavity wall of the first cavity is provided with a water inlet and a water outlet.

[0006] A pump cover for sealing the first opening and detachably connected to the pump body.

[0007] A hydraulic impeller rotatably arranged in the first cavity and coaxially arranged with the first cavity.

[0008] A pump shaft connected to the hydraulic impeller.

[0009] The pump cover is provided with an axial second opening through which the pump shaft passes. The hydraulic impeller includes a first wheel body and first blades. The extending direction of the water inlet is perpendicular to the radial direction of the highest point of the hydraulic impeller. The central height of the water inlet is located at one-fourth to one-half of the first blade from the outside to the inside when rotating to the highest point. The height of the lower end of the water outlet is located at one-fourth to one-half of the first blade from the outside to the inside when rotating to the lowest point, and the height of the upper end of the water outlet is not higher than the height of the center of the hydraulic impeller. The water inlet and the water outlet are arranged vertically relative to the pump shaft and on the same side, and the water inlet is above the pump shaft.

[0010] Compared with the prior art, the advantages of the present application are that the water inlet and the water outlet are arranged on the same side, the water flow impact distance is long, the energy utilization rate is high, and the solid part filled with water flow is large. The distance between the water inlet and the water outlet is small, and the space with sparse water flow is small, which can effectively prevent vibration and improve the operation stability; overall, the energy utilization rate is high, and it is a water energy conversion method suitable for high-head and ultra-low-flow conditions.

[0011] In some embodiments of the present application, the water inlet is a round hole; the diameter of the water inlet is the same as the thickness of the first blade; the center of the water inlet and the midpoint of the thickness of the first blade are in the same plane; the cross-section of the water outlet is rectangular; the thickness of the water outlet is greater than the thickness of the first blade; the cross-sectional area of the water outlet gradually decreases from inside to outside; the bottom surface of the water outlet directly connected to the first cavity is parallel to the horizontal plane.

[0012] In some embodiments of the present application, a water inlet cavity is provided on the first cavity. The water inlet cavity includes a first surface and a second surface that are perpendicular to each other. The second surface is tangent to the highest point of the first cavity, and the water inlet is provided on the first surface.

[0013] In some embodiments of the present application, a water inlet pipe extending outward is provided on the pump body. A water inlet channel is provided on the water inlet pipe. The water inlet channel communicates with the water inlet through a conical surface, and the radial cross-sectional area of the conical surface gradually increases from inside to outside; a water outlet pipe extending outward is provided on the pump body. A water outlet channel is provided on the water outlet pipe. The water outlet channel communicates with the water outlet, and the radial cross-sectional area of the water outlet channel gradually increases from inside to outside.

[0014] In some embodiments of the present application, the center height of the water inlet is located at one-third of the first blade from outside to inside when it rotates to the highest point; the height of the lower end of the water outlet is located at one-third of the first blade from outside to inside when it rotates to the lowest point.

[0015] In some embodiments of the present application, a step is provided on the pump shaft; a shaft sleeve is sleeved on the pump shaft. One end of the shaft sleeve abuts against the first wheel body, and the other end abuts against the step; a mechanical seal is used between the pump cover and the shaft sleeve; the mechanical seal includes a stationary ring assembly and a rotating ring assembly. The stationary ring assembly is fixedly connected to the pump cover. The stationary ring assembly is sleeved on the shaft sleeve. The rotating ring assembly is arranged between the stationary ring assembly and the first wheel body. The rotating ring assembly is sleeved on the shaft sleeve; an oil passage is provided on the pump cover.

[0016] In some embodiments of the present application, a second cavity is provided on the pump body. The second cavity communicates with the first cavity. The first opening and the second cavity are respectively arranged on both sides of the hydraulic impeller. A part of the pump shaft is arranged in the second cavity; the cross-section of the second cavity is circular; the maximum diameter of the second cavity is smaller than the diameter of the first wheel body.

[0017] In some embodiments of the present application, the cross-section of the first blade includes a first arc group that is recessed inward, and the two sides of the first arc group are symmetrically arranged; the included angle between the tangent line on one side of the first arc group and the tangent line on the symmetrically opposite side gradually decreases as the tangent point moves from the center to both sides; the cross-section of the first blade includes a second arc group that protrudes outward, and the two sides of the second arc group are symmetrically arranged; the second arc group is arranged at an equal distance from the first arc group; the first arc group is connected to the first wheel body through a third arc group, and the third arc group is recessed inward; the ratio of the recessed depth of the first arc group to the width of the first arc group is 0.4 - 0.5; the ratio of the thickness of the first blade to the height of the first blade is 0.5.

[0018] A hydraulic fan obtained by the present utility model includes the above-mentioned hydraulic driving device and a fan assembly. The fan assembly includes a wind impeller, and the wind impeller is connected to the pump shaft; the fan assembly further includes a housing, and a fan guide vane is provided on the housing. The wind impeller is arranged between the fan guide vane and the pump cover; the housing is in a cylindrical shape, and the wind impeller is arranged inside the housing.

[0019] In some embodiments of the present application, a bearing box is provided between the pump cover and the wind impeller. One end of the bearing box is connected to the pump cover, and the other end is provided with a bearing cover. The bearing cover is detachably connected to the bearing box. A third opening is provided on the bearing cover, and the pump shaft passes through the third opening; a bearing is provided between the pump shaft and the bearing box, and both sides of the bearing are respectively abutted against the pump shaft and the bearing box; the pump body is provided with a first mounting foot extending outward; the housing is provided with a second mounting foot; a support frame is further included, and both the first mounting foot and the second mounting foot are fixedly connected to the support frame.

[0020] In some embodiments of the present application, the wind impeller includes a second wheel body and at least two groups of blade groups. The adjacent blade groups are arranged at intervals along the radial direction of the second wheel body. The blade groups are connected to the second wheel body, and the second wheel body is connected to the pump shaft.

[0021] Further, the fan guide vane includes a third wheel body and a guide vane group. The outer end of the guide vane group is fixedly connected to the housing, and the third wheel body is connected to the outermost guide vane group; the number of the guide vane groups is the same as the number of the blade groups; the blade groups and the guide vane groups are arranged at intervals; the diameter of the second wheel body is the same as the diameter of the third wheel body.

[0022] Further, the housing includes an upper housing and a lower housing, and the upper housing and the lower housing can be detachably opposed to each other; the third wheel body includes an upper wheel body and a lower wheel body, and the upper wheel body and the lower wheel body can be detachably opposed to each other. The upper wheel body is connected to the upper housing, and the lower wheel body is connected to the lower housing; a part of the guide vane group is arranged between the upper wheel body and the upper housing, and the remaining part is arranged between the lower wheel body and the lower housing.

[0023] Furthermore, the projections of adjacent blade groups along the radial direction of the second wheel body all coincide; the blade group includes second blades, the width of the second blades gradually decreases from the center to the outer end, and the second blades are evenly distributed around the second wheel body; the projections of adjacent guide vane groups along the radial direction of the third wheel body all coincide; the guide vane group includes third blades, and the third blades are evenly distributed around the third wheel body; the ratio of the diameter of the innermost end of the second blade to the diameter of the outermost end of the second blade is 1:4.

[0024] A hydraulic fan obtained by the present utility model, in which the hydraulic driving device is integrated with the wind impeller, has the advantages of high pressure, low flow rate, large air volume, low air pressure, and high static pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the structural schematic diagram of Embodiment 1 of the present utility model Figure 1 ;

[0026] Figure 2 is the structural schematic diagram of Embodiment 1 of the present utility model Figure 2 ;

[0027] Figure 3 is the structural schematic diagram of the hydraulic impeller of Embodiment 1 of the present utility model;

[0028] Figure 4 is Figure 1 the rotated sectional view in the A-A direction in

[0029] Figure 5 is Figure 1 the sectional view in the B-B direction in

[0030] Figure 6 is the internal flow schematic diagram of the hydraulic impeller of Embodiment 1 of the present utility model;

[0031] Figure 7 is the streamline distribution diagram of Embodiment 1 of the present utility model;

[0032] Figure 8 is the energy loss schematic diagram generated by the collision of the longitudinal vortex and the first wheel body in Embodiment 1 of the present utility model;

[0033] Figure 9 is the energy loss schematic diagram generated by the collision of the axial vortex and the first blade in Embodiment 1 of the present utility model;

[0034] Figure 10 is the structural schematic diagram of Embodiment 2 of the present utility model Figure 1 ;

[0035] Figure 11 is the structural schematic diagram of Embodiment 2 of the present utility model Figure 2 ;

[0036] Figure 12 is the structural schematic diagram of Embodiment 3 of the present utility model Figure 1 ;

[0037] Figure 13 is the structural schematic diagram of Embodiment 3 of the present utility model Figure 2 ;

[0038] Figure 14 is the structural schematic diagram of the housing of Embodiment 3 of the present utility model;

[0039] Figure 15 is the structural schematic diagram of the wind impeller of Embodiment 3 of the present utility model;

[0040] Figure 16 is the two-stage series structure velocity streamline diagram under the rated working condition of Embodiment 3 of the present invention;

[0041] Figure 17 is the inter-stage velocity vector diagram of the two-stage series structure under the rated working condition of Embodiment 3 of the present utility model.

[0042] In the figure: 1. Pump body; 2. First cavity; 3. First opening; 4. Water inlet; 5. Water outlet; 6. Pump cover; 7. Hydraulic impeller; 8. Pump shaft; 9. Second opening; 10. First wheel body; 11. First blade; 12. Water inlet cavity; 13. First surface; 14. Second surface; 15. Water inlet pipe; 16. Water inlet channel; 17. Conical surface; 18. Water outlet pipe; 19. Water outlet channel; 20. Step; 21. Sleeve; 22. Static seal assembly; 23. Dynamic seal assembly; 24. Oil passage; 25. Second cavity; 26. Fan assembly; 27. Wind impeller; 28. Housing; 29. Fan guide vane; 30. Bearing housing; 31. Bearing cover; 32. Third opening; 33. Bearing; 34. First mounting foot; 35. Second mounting foot; 36. Support frame; 37. Second wheel body; 38. Blade group; 39. Third wheel body; 40. Guide vane group; 41. Upper housing; 42. Lower housing; 43. Upper wheel body; 44. Lower wheel body; 45. Second blade; 46. Third blade; 111. First arc group; 112. Second arc group; 113. Third arc group. Detailed implementation manners

[0043] To further elaborate on the technical means and effects adopted by the present utility model to achieve the predetermined utility model purpose, the following, in conjunction with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and their effects of the present utility model as follows.

[0044] Embodiment 1:

[0045] A hydraulic drive device provided in this embodiment, such as Figure 1 , Figure 2 , Figure 4 ,Figure 5 As shown in the figure, it includes:

[0046] The pump body 1 is provided with a first cavity 2 having a circular cross-section. The first cavity 2 is provided with an axial first opening 3. The cavity wall of the first cavity 2 is provided with a water inlet 4 and a water outlet 5;

[0047] The pump cover 6 is used to seal the first opening 3 and is detachably connected to the pump body 1;

[0048] The hydraulic impeller 7 is rotatably arranged in the first cavity 2 and is coaxially arranged with the first cavity 2;

[0049] The pump shaft 8 is connected to the hydraulic impeller 7;

[0050] The pump cover 6 is provided with an axial second opening 9, and the pump shaft 8 passes through the second opening 9; The hydraulic impeller 7 includes a first wheel body 10 and a first blade 11; The extending direction of the water inlet 4 is perpendicular to the radial direction of the highest point of the hydraulic impeller 7. The central height of the water inlet 4 is located at one-fourth to one-half of the first blade 11 from the outside to the inside when it rotates to the highest point; The height of the lower end of the water outlet 5 is located at one-fourth to one-half of the first blade 11 from the outside to the inside when it rotates to the lowest point. The height of the upper end of the water outlet 5 is not higher than the height of the center of the hydraulic impeller 7. The highest point of the water inlet 4 is not higher than the vertex of the first blade 11 when it rotates to the highest point, and the lowest point of the water inlet 4 is not lower than the highest point of the first wheel body 10; The water inlet 4 and the water outlet 5 are arranged up and down relative to the pump shaft 8 and are arranged on the same side, and the water inlet 4 is above the pump shaft 8. In this embodiment, the height of the upper end of the water outlet 5 is the same as the height of the center of the hydraulic impeller 7.

[0051] The extending direction of the water inlet 4 is perpendicular to the radial direction of the highest point of the hydraulic impeller 7, so that the incoming water flow in the first cavity 2 can vertically push the highest first blade 11. The first blades below the highest first blade 11 and close to the water inlet 4 side can also receive the force pushing towards the highest first blade 11, with high energy utilization rate of the incoming water flow. And the water inlet height is at one-fourth to one-half of the highest first blade 11 from the outside to the inside, making the main point where the first blade 11 receives the thrust be in the upper half of the first blade 11, with a long lever arm, which is convenient for driving the hydraulic impeller 7 to rotate. Also, most of the incoming water flow can be pushed onto the first blade 11, and it will not cause some of the incoming water flow to impact outside the first blade 11 or the cavity wall of the first cavity 2 due to too long a lever arm; the opening range of the water outlet 5 is large, which is convenient for the water flow to flow out. The lower end height of the water outlet 5 can be higher than the lowest first blade 11, making its energy utilization rate of the water flow high. When the first blade 11 is at the lowest point, the gravitational potential energy is just completely converted, and the water flow still has a large impact force. By continuously pushing the first blade 11 to rise, the energy of the water flow is further reduced, and the energy utilization rate is improved. At the same time, the impact force on the water outlet 5 is reduced; the water inlet 4 and the water outlet 5 are arranged on the same side, with a long water flow impact distance, high energy utilization rate, and a large solid part filled with water flow. The distance between the water inlet 4 and the water outlet 5 is small, and the space with sparse water flow is small, which can effectively prevent vibration and improve the operation stability. During use, the incoming water flow pushes the first blade 11, causing the hydraulic impeller 7 to rotate, and the hydraulic impeller 7 drives the pump shaft 8 to rotate, so that the pump shaft 8 outputs power externally.

[0052] To ensure reliable water inlet, the water inlet 4 is a round hole; the diameter of the water inlet 4 is the same as the thickness of the first blade 11; the center of the water inlet 4 and the midpoint of the thickness of the first blade 11 are in the same plane. For the round hole-shaped water inlet 4, the incoming water energy is more concentrated; the diameter of the water inlet 4 is the same as the thickness of the first blade 11, which can make most of the incoming water flow reach the first blade 11, reducing energy loss.

[0053] To ensure reliable water outlet, the cross-section of the water outlet 5 is rectangular; the thickness of the water outlet 5 is greater than the thickness of the first blade 11; the cross-sectional area of the water outlet 5 gradually decreases from inside to outside; the bottom surface of the water outlet 5 directly connected to the first cavity 2 is parallel to the horizontal plane. The rectangular cross-section of the water outlet 5 increases the water outlet area, making it more convenient for water to flow out; the thickness of the water outlet 5 is also the width of the water outlet 5. The large width of the water outlet 5 enables the water flow brought by the first blade 11 to directly enter the water outlet 5, reducing the collision between the water flow driven by the first blade 11 and the cavity wall and reducing energy loss; the cross-sectional area of the water outlet 5 gradually decreases from inside to outside, which can increase the water outlet pressure and facilitate the water flow output; the bottom surface of the water outlet 5 connected to the first cavity 2 is a horizontal plane, which facilitates the transportation of the water flow. After some of the water flow pushes the lowest first blade 11 to rise, it can just flow out horizontally.

[0054] For stable operation, a water inlet chamber 12 is provided on the first chamber 2. The water inlet chamber 12 includes a first surface 13 and a second surface 14 that are perpendicular to each other. The second surface 14 is tangent to the highest point of the first chamber 2, and the water inlet 4 is provided on the first surface 13. After part of the water flow impacts the first vane 11, it will spread and move in the opposite direction. In a narrow space, this will affect the continuous impact of the subsequent water flow on the first vane 11. The design of the water inlet chamber 12 enables this part of the water flow to spread into the water inlet chamber 12 without directly affecting the subsequent water flow, thereby improving the operation stability.

[0055] For reliable water inlet, a water inlet pipe 15 that extends outward is provided on the pump body 1. A water inlet passage 16 is provided on the water inlet pipe 15. The water inlet passage 16 communicates with the water inlet 4 through a conical surface 17, and the radial cross-sectional area of the conical surface 17 gradually increases from the inside to the outside. The design of the water inlet pipe 15 facilitates the connection of the water inlet pipeline; the cross-sectional area of the water inlet passage 16 is larger than the cross-sectional area of the water inlet 4 to ensure the water inlet flow rate; the design of the conical surface 17 increases the water inlet pressure, making the pressure of the water inlet on the first vane 11 greater and improving the power.

[0056] For reliable water outlet, a water outlet pipe 18 that extends outward is provided on the pump body 1. A water outlet passage 19 is provided on the water outlet pipe 18. The water outlet passage 19 communicates with the water outlet 5, and the radial cross-sectional area of the water outlet passage 19 gradually increases from the inside to the outside. The design of the water outlet pipe 18 facilitates the connection of the water outlet pipeline; the cross-sectional area of the water outlet passage 19 is larger than the cross-sectional area of the water outlet 5 to ensure the water outlet flow rate.

[0057] For reliable water inlet, the center height of the water inlet 4 is located at one-third of the first vane 11 from the outside to the inside when it rotates to the highest point. Setting it at one-third can not only ensure a longer force arm but also ensure that most of the water inlet flow is used to push the first vane 11.

[0058] For reliable water outlet, the height of the lower end of the water outlet 5 is located at one-third of the first vane 11 from the outside to the inside when it rotates to the lowest point. Setting it at one-third can not only improve the energy utilization of the water flow but also ensure that most of the water can flow out conveniently.

[0059] For more stable operation, a step 20 is provided on the pump shaft 8; a shaft sleeve 21 is sleeved on the pump shaft 8. One end of the shaft sleeve 21 abuts against the first wheel body 10, and the other end abuts against the step 20; a mechanical seal is adopted between the pump cover 6 and the shaft sleeve 21. The mechanical seal includes a stationary ring assembly 22 and a rotating ring assembly 23. The stationary ring assembly 22 is fixedly connected to the pump cover 6, the stationary ring assembly 22 is sleeved on the shaft sleeve 21, the rotating ring assembly 23 is arranged between the stationary ring assembly 22 and the first wheel body 10, and the rotating ring assembly 23 is sleeved on the shaft sleeve 21; an oil passage 24 is provided on the pump cover 6. Adopting a mechanical seal has good sealing performance; the oil passage 24 communicates with the outside and the outer surface of the shaft sleeve 21 respectively, facilitating refueling and lubrication.

[0060] The pump cover 6 and the pump body 1 are sealed by a sealing ring; the pump cover 6 is provided with a boss that cooperates with the first opening 3, and the boss is snapped into the first opening 3, providing better sealing and higher installation accuracy; the shaft sleeve 21 and the pump shaft 8 are sealed by a sealing ring.

[0061] To operate more stably, a second cavity 25 is provided on the pump body 1. The second cavity 25 communicates with the first cavity 2. The first opening 3 and the second cavity 25 are respectively arranged on both sides of the hydraulic impeller 7. A part of the pump shaft 8 is arranged in the second cavity 25; the cross-section of the second cavity 25 is circular; the maximum diameter of the second cavity 25 is smaller than the diameter of the first wheel body 10. The second cavity 25 is used to accommodate the pump shaft 8, so that both sides of the pump shaft 8 can extend out of the hydraulic impeller 7, making the rotation of the hydraulic impeller 7 more stable; the maximum diameter of the second cavity 25 is smaller than the diameter of the first wheel body 10, which can prevent the water flow pushed by the first blade 11 from entering the second cavity 25 and causing energy waste.

[0062] To improve efficiency, as Figure 3 shown, the cross-section of the first blade 11 includes a first arc group 111 that is recessed inward, and the two sides of the first arc group 111 are symmetrically arranged; the included angle between the tangent on one side of the first arc group 111 and the tangent on the symmetrically opposite side gradually decreases as the tangent point moves from the center to both sides; the cross-section of the first blade 11 includes a second arc group 112 that is convex outward, and the two sides of the second arc group 112 are symmetrically arranged; the second arc group 112 is arranged at an equal distance from the first arc group 111; the first arc group 111 is connected to the first wheel body 10 through a third arc group 113, and the third arc group 113 is recessed inward; the ratio of the recessed depth of the first arc group 111 to the width of the first arc group 111 is 0.4 - 0.5; the ratio of the thickness of the first blade 11 to the height of the first blade 11 is 0.5. In this embodiment, the recessed depth of the first arc group 111 is 2.4 mm, and the width of the first arc group 111 is 5 mm. The first arc group 111, the second arc group 112, and the third arc group 113 can all be single arcs or the connection of multiple arcs.

[0063] Refer to Figure 6 , Figure 6 is a schematic diagram of the internal flow of the hydraulic impeller 7;

[0064] Refer to Figure 7 , Figure 7 is a streamline distribution diagram inside the hydraulic drive device;

[0065] Refer to Figure 8 , Figure 8 is a schematic diagram of the energy loss caused by the collision between the longitudinal vortex and the first wheel body 10;

[0066] Refer to Figure 9 ,Figure 9 It is a schematic diagram of the energy loss generated by the collision between the axial vortex and the first blade 11.

[0067] From Figures 6 - 9 simulation, it can be obtained that the overall shape of the first blade 11 is a three-dimensional twist with a large inclination angle, mainly to strengthen the longitudinal vortex, thereby enhancing the energy exchange between the fluid outside the first blade 11 and the fluid inside the first blade 11, and reducing the radial and axial vortex losses. The space between adjacent first blades 11 has a non-uniform cross-section, mainly to improve the flow change law from the water inlet 4 to the water outlet 5 and reduce the loss during energy exchange.

[0068] Embodiment 2:

[0069] A hydraulic fan provided in this embodiment, as Figure 10 , Figure 11 shown, includes a hydraulic driving device described in Embodiment 1 and a fan assembly 26. The fan assembly 26 includes a wind impeller 27, and the wind impeller 27 is connected to the pump shaft 8; the fan assembly 26 further includes a housing 28, and a fan guide vane 29 is provided on the housing 28. The wind impeller 27 is arranged between the fan guide vane 29 and the pump cover 6; the housing 28 is in a cylindrical shape, and the wind impeller 27 is arranged inside the housing 28. The wind impeller 27 is used to rotate to generate wind power; the fan guide vane 29 is used to guide the wind power generated by the wind impeller 27; the cylindrical shape of the housing 28 has good adaptability to the wind impeller 27, and the wind impeller 27 is inside the housing 28, which can concentrate the wind power generated by the wind impeller 27; by connecting the fan assembly 26 and the hydraulic driving device, the hydraulic power can be converted into wind power, with a large air volume and a low air pressure, and there is no need to electrically drive the fan assembly 26, which is convenient for use in explosion-proof places such as mines.

[0070] In order to ensure reliable connection between the hydraulic driving device and the fan assembly 26, a bearing box 30 is provided between the pump cover 6 and the wind impeller 27. One end of the bearing box 30 is connected to the pump cover 6, and the other end is provided with a bearing cover 31. The bearing cover 31 is detachably connected to the bearing box 30, and a third opening 32 is provided on the bearing cover 31. The pump shaft 8 passes through the third opening 32; a bearing 33 is provided between the pump shaft 8 and the bearing box 30, and both sides of the bearing 33 are in contact with the pump shaft 8 and the bearing box 30 respectively; the bearing 33 is arranged at both ends of the bearing box 30. The design of the bearing box 30 can improve the protection performance and prevent sundries from entering and contacting the pump shaft 8; the design of the bearing 33 can make the rotation of the pump shaft 8 smoother, and through the support of the bearing box 30 for the bearing 33, the pump shaft 8 can be supported accordingly.

[0071] For convenient installation, the pump body 1 is provided with a first mounting foot 34 extending outward; the housing 28 is provided with a second mounting foot 35; further included is a support frame 36, and both the first mounting foot 34 and the second mounting foot 35 are fixedly connected to the support frame 36. The design of the first mounting foot 34 facilitates the installation and fixation of the hydraulic driving device; the design of the second mounting foot 35 facilitates the installation and fixation of the fan assembly 26; the design of the support frame 36 fixes the hydraulic driving device and the fan assembly 26 as a whole. There is less error during the installation of the hydraulic driving device and the fan assembly 26, and the overall strength is high. Only by fixing the support frame 36 can the overall installation and fixation be completed, which is convenient for on-site construction installation.

[0072] Embodiment 3:

[0073] A hydraulic fan provided in this embodiment, as Figure 12 、 Figure 13 shown, in addition to the features described in Embodiment 2, in order to increase the air volume, the wind impeller 27 includes a second wheel body 37 and at least two groups of blade groups 38. Adjacent blade groups 38 are arranged at intervals along the radial direction of the second wheel body 37. The blade group 38 is connected to the second wheel body 37, and the second wheel body 37 is connected to the pump shaft 8. In this embodiment, two groups of blade groups 38 are provided. The design of the two groups of blade groups 38 can increase the wind force, while ensuring a small volume of the hydraulic fan and a high static pressure.

[0074] For reliable air guiding, the fan guide vane 29 includes a third wheel body 39 and a guide vane group 40. The outer end of the guide vane group 40 is fixedly connected to the housing 28, and the third wheel body 39 is connected to the outermost guide vane group 40; the number of the guide vane groups 40 is the same as the number of the blade groups 38; the blade groups 38 and the guide vane groups 40 are arranged at intervals; the diameter of the second wheel body 37 is the same as the diameter of the third wheel body 39. The blade groups 38 and the guide vane groups 40 are arranged at intervals, so that the guide vane group 40 guides the air flow coming out of each blade group 38 to ensure uniform air flow direction; the diameter of the second wheel body 37 is the same as the diameter of the third wheel body 39, so that the third wheel body 39 does not block the air duct, and at the same time, the connection with the second wheel body 37 is flat to ensure smooth air flow.

[0075] For convenient assembly, as Figure 14As shown, the housing 28 includes an upper housing 41 and a lower housing 42, and the upper housing 41 and the lower housing 42 are relatively detachable; the third wheel body 39 includes an upper wheel body 43 and a lower wheel body 44, and the upper wheel body 43 and the lower wheel body 44 are relatively detachable. The upper wheel body 43 is connected to the upper housing 41, and the lower wheel body 44 is connected to the lower housing 42; a part of the guide vane group 40 is arranged between the upper wheel body 43 and the upper housing 41, and the remaining part is arranged between the lower wheel body 44 and the lower housing 42; the upper housing 41 and the lower housing 42 are connected by bolts. The blade group 38 and the guide vane group 40 are arranged at intervals from each other, making it difficult to install the blade group 38 and the guide vane group 40. The upper housing 41 and the lower housing 42 are relatively detachable, which can facilitate the assembly of the blade group 38 and the guide vane group 40. The guide vane group 40 is divided into two parts along with the upper housing 41 and the lower housing 42, and can be sleeved onto the wind turbine impeller 27 from both sides, facilitating installation.

[0076] To improve the air guiding effect, as Figure 15 shown, the projections of adjacent blade groups 38 along the radial direction of the second wheel body 37 all coincide, that is, the sizes and angles of adjacent second blades 45 in the radial direction of the second wheel body 37 are the same, and all the blade groups 38 rotate coaxially, which can reduce the influence between the blade groups 38; the blade group 38 includes a second blade 45, and the width of the second blade 45 gradually decreases from the center to the outer end, and the second blades 45 are evenly distributed around the second wheel body 37; the projections of adjacent guide vane groups 40 along the radial direction of the third wheel body 39 all coincide, that is, the sizes and angles of adjacent third blades 46 in the radial direction of the third wheel body 39 are the same, which can reduce the influence between the guide vane groups 40 and ensure the air guiding effect; the guide vane group 40 includes a third blade 46, and the third blades 46 are evenly distributed around the third wheel body 39; the ratio of the diameter of the innermost end of the second blade 45 to the diameter of the outermost end of the second blade 45 is 1:4.

[0077] Rated operating conditions: flow rate 603 m3 / h, wind pressure 121.2 Pa, static pressure 89.3 Pa, rotational speed 1950 rpm, pneumatic efficiency 61.4%.

[0078] Refer to Figure 16 , Figure 16 which is the velocity streamline diagram of the two-stage series structure under rated operating conditions. It can be seen from the figure that there is no obvious flow-around phenomenon;

[0079] Refer to Figure 17 , Figure 17 which is the inter-blade velocity vector diagram of the two-stage series structure under rated operating conditions. It can be seen from the figure that after the impeller is unfolded, the flow velocity distribution between the rotor blades can be found, and the meridional plane and the inter-blade flow field are relatively uniform, and no secondary flow structure appears;

[0080] In this embodiment, it is a two-stage series structure. Two wind blade groups 38 and two guide vane groups 40 are provided respectively. The wind blade groups 38 and the guide vane groups 40 are arranged in series, which can increase the static pressure of the product and avoid the situation of excessive local load. The hydraulic driving device is integrated with the wind power impeller 27, having the advantages of high pressure, low flow rate, large air volume, low air pressure and high static pressure.

[0081] Of course, there can be multiple wind blade groups 38 and guide vane groups 40, and multiple wind blade groups 38 and guide vane groups 40 are arranged in series.

[0082] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A hydraulic drive device, characterized in that: include: The pump body (1) is provided with a first cavity (2) having a circular cross section, the first cavity (2) is provided with an axial first opening (3), and the cavity wall of the first cavity (2) is provided with a water inlet (4) and a water outlet (5); A pump cover (6), used for sealing the first opening (3) and detachably connected to the pump body (1); A hydraulic impeller (7) is rotatably disposed in the first cavity (2) and is coaxially arranged with the first cavity (2); A pump shaft (8) connected to the hydraulic impeller (7); The pump cover (6) is provided with an axial second opening (9), and the pump shaft (8) is inserted into the second opening (9); the hydraulic impeller (7) comprises a first wheel body (10) and a first blade (11); the extension direction of the water inlet (4) is perpendicular to the radial direction of the highest point of the hydraulic impeller (7), and the center height of the water inlet (4) is located at a quarter to a half of the first blade (11) from the outside to the inside when the water inlet (4) rotates to the highest point; the height of the lower end of the water outlet (5) is located at a quarter to a half of the first blade (11) from the outside to the inside when the water inlet (4) rotates to the lowest point, and the height of the upper end of the water outlet (5) is not higher than the hydraulic impeller (7). ) center; the water inlet (4) and the water outlet (5) are arranged up and down relative to the pump shaft (8) and are arranged on the same side, and the water inlet (4) is located above the pump shaft (8); a second cavity (25) is provided on the pump body (1), the second cavity (25) is communicated with the first cavity (2), the first opening (3) and the second cavity (25) are arranged on both sides of the hydraulic impeller (7), respectively, and part of the pump shaft (8) is arranged in the second cavity (25); the diameter of the water inlet (4) is the same as the thickness of the first blade (11); the center of the water inlet (4) and the midpoint of the thickness of the first blade (11) are located on the same plane.

2. A hydraulic drive device according to claim 1, characterized in that: The first cavity (2) is provided with a water inlet cavity (12), the water inlet cavity (12) comprising a first surface (13) and a second surface (14) which are perpendicular to each other, the second surface (14) being tangent to the highest point of the first cavity (2), and the water inlet (4) being arranged on the first surface (13).

3. A hydraulic drive device according to claim 1, characterized in that: The water inlet (4) is a circular hole; the cross section of the water outlet (5) is a rectangle; the thickness of the water outlet (5) is greater than the thickness of the first blade (11); the cross-sectional area of ​​the water outlet (5) gradually decreases from the inside to the outside; and the bottom surface of the water outlet (5) directly connected to the first cavity (2) is parallel to the horizontal plane.

4. A hydraulic drive device according to claim 1, characterized in that: The center height of the water inlet (4) is located at one third of the distance from the outside to the inside of the first blade (11) when it rotates to the highest point; the height of the lower end of the water outlet (5) is located at one third of the distance from the outside to the inside of the first blade (11) when it rotates to the lowest point.

5. A hydraulic drive device according to claim 1, characterized in that: The pump body (1) is provided with an outwardly extending water inlet pipe (15), the water inlet pipe (15) is provided with a water inlet channel (16), the water inlet channel (16) is connected to the water inlet (4) via a conical surface (17), and the radial cross-sectional area of ​​the conical surface (17) gradually increases from the inside to the outside; the pump body (1) is provided with an outwardly extending water outlet pipe (18), the water outlet pipe (18) is provided with a water outlet channel (19), the water outlet channel (19) is connected to the water outlet (5), and the radial cross-sectional area of ​​the water outlet channel (19) gradually increases from the inside to the outside.

6. A hydraulic drive device according to claim 1, characterized in that: The cross section of the first blade (11) comprises a first arc group (111) that is concave inwards, and the first arc group (111) is symmetrically arranged on both sides; the angle between the tangent on one side of the first arc group (111) and the tangent on the other side that is symmetrical gradually decreases from the tangent point moving from the center to both sides; the cross section of the first blade (11) comprises a second arc group (112) that is convex outwards, and the second arc group (112) is symmetrically arranged on both sides; the second arc group (112) and the first arc group (111) are arranged equidistantly; the first arc group (111) is connected to the first wheel body (10) through a third arc group (113), and the third arc group (113) is concave inwards; the ratio between the concave depth of the first arc group (111) and the width of the first arc group (111) is 0.4-0.5; and the ratio between the thickness of the first blade (11) and the height of the first blade (11) is 0.

5.

7. A hydraulic drive device according to claim 1, characterized in that: The pump shaft (8) is provided with a step (20); a shaft sleeve (21) is sleeved on the pump shaft (8); one end of the shaft sleeve (21) abuts against the first wheel body (10), and the other end abuts against the step (20); a mechanical seal is used between the pump cover (6) and the shaft sleeve (21); the mechanical seal comprises a stationary ring assembly (22) and a dynamic ring assembly (23); the stationary ring assembly (22) is connected and fixed to the pump cover (6); the stationary ring assembly (22) is sleeved on the shaft sleeve (21); the dynamic ring assembly (23) is arranged between the stationary ring assembly (22) and the first wheel body (10), and the dynamic ring assembly (23) is sleeved on the shaft sleeve (21); and an oil passage (24) is provided on the pump cover (6).

8. A hydraulic drive device according to claim 1, characterized in that: The cross section of the second cavity (25) is circular; the maximum diameter of the second cavity (25) is smaller than the diameter of the first wheel body (10).

9. A hydraulic fan, characterized in that: The invention comprises a hydraulic drive device and a fan assembly (26) as claimed in any one of claims 1 to 8, wherein the fan assembly (26) comprises a wind impeller (27), and the wind impeller (27) is connected to a pump shaft (8); the fan assembly (26) further comprises a housing (28), and a fan guide vane (29) is provided on the housing (28), and the wind impeller (27) is arranged between the fan guide vane (29) and the pump cover (6); the housing (28) is cylindrical, and the wind impeller (27) is arranged in the housing (28).

10. A hydraulic fan according to claim 9, characterized in that: The wind impeller (27) comprises a second wheel body (37) and at least two groups of wind blade groups (38), wherein adjacent wind blade groups (38) are arranged at intervals along the radial direction of the second wheel body (37), the wind blade groups (38) are connected to the second wheel body (37), and the second wheel body (37) is connected to the pump shaft (8).

11. A hydraulic fan according to claim 10, characterized in that: The fan guide vane (29) comprises a third wheel body (39) and a guide vane group (40); the outer end of the guide vane group (40) is fixedly connected to the housing (28); the third wheel body (39) is connected to the outermost guide vane group (40); the number of the guide vane groups (40) is the same as the number of the wind blade groups (38); the wind blade groups (38) and the guide vane groups (40) are arranged at intervals; and the diameter of the second wheel body (37) is the same as the diameter of the third wheel body (39).

12. A hydraulic fan according to claim 11, characterized in that: The projections of adjacent wind blade groups (38) along the radial direction of the second wheel body (37) all overlap; the wind blade group (38) includes a second blade (45), the width of the second blade (45) gradually decreases from the center to the outer end, and the second blade (45) is evenly distributed around the second wheel body (37); the projections of adjacent guide vane groups (40) along the radial direction of the third wheel body (39) all overlap; the guide vane group (40) includes a third blade (46), and the third blade (46) is evenly distributed around the third wheel body (39); the ratio of the innermost diameter of the second blade (45) to the outermost diameter of the second blade (45) is 1:

4.

13. A hydraulic fan according to claim 11, characterized in that: The housing (28) comprises an upper housing (41) and a lower housing (42), and the upper housing (41) and the lower housing (42) are relatively detachable; the third wheel body (39) comprises an upper wheel body (43) and a lower wheel body (44), and the upper wheel body (43) and the lower wheel body (44) are relatively detachable, the upper wheel body (43) is connected to the upper housing (41), and the lower wheel body (44) is connected to the lower housing (42); part of the guide vane group (40) is arranged between the upper wheel body (43) and the upper housing (41), and the remaining part is arranged between the lower wheel body (44) and the lower housing (42).

14. A hydraulic fan according to claim 9, characterized in that: A bearing box (30) is provided between the pump cover (6) and the wind impeller (27); one end of the bearing box (30) is connected to the pump cover (6), and the other end is provided with a bearing cover (31); the bearing cover (31) is detachably connected to the bearing box (30); a third opening (32) is provided on the bearing cover (31), and the pump shaft (8) is inserted through the third opening (32); a bearing (33) is provided between the pump shaft (8) and the bearing box (30), and two sides of the bearing (33) are respectively in contact with the pump shaft (8) and the bearing box (30); a first mounting foot (34) extending outward is provided on the pump body (1); a second mounting foot (35) is provided on the housing (28); and a support frame (36) is further provided, wherein both the first mounting foot (34) and the second mounting foot (35) are connected and fixed to the support frame (36).

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