A two-stage axial flow pump impeller and guide vane adjustment device

Abstract

The present invention belongs to the field of fluid machinery technology, and in particular relates to a two-stage axial flow pump impeller and guide vane adjustment device, comprising a bracket, the bracket being coaxially fixedly arranged inside the pump end cover; a first hydraulic cylinder, the first hydraulic cylinder being fixedly embedded inside the bracket; a base, the base being arranged inside the pump end cover and one end being coaxially rotatably connected to the bracket, the outer wall of the base being fixedly connected to a base, the outer wall of the base being fixedly connected to blades, and an accommodating cavity being left between the bases; a second hydraulic cylinder, the second hydraulic cylinder being fixedly embedded in the accommodating cavity, one end of the second hydraulic cylinder being connected to one end of the first hydraulic cylinder, and the other end of the second hydraulic cylinder being connected to the other end of the first hydraulic cylinder. The present invention can optimize the flow state of the two-stage bidirectional axial flow pump when it has bidirectional inflow, thereby improving the hydraulic efficiency of the pump and reducing the energy loss of the pump.

Description

Technical Field

[0001] The present invention belongs to the technical field of fluid machinery, and in particular relates to a two-stage axial flow pump impeller and guide vane adjustment device. Background Art

[0002] A two-stage, bidirectional axial flow pump is a special type of axial flow pump that achieves bidirectional pumping of media through forward and reverse rotation. In existing two-stage, bidirectional axial flow pumps, the impeller and guide vane arrangement is only suitable for unidirectional media flow. When the media is pumped in the reverse direction, the impeller and guide vane arrangement is not conducive to flow optimization, reducing hydraulic efficiency and causing energy loss.

[0003] Therefore, it is necessary to design a two-stage axial flow pump impeller and guide vane adjustment device to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a two-stage axial flow pump impeller and guide vane adjustment device to solve the above problems and achieve the purpose of improving hydraulic efficiency and reducing energy loss.

[0005] To achieve the above object, the present invention provides the following solution: a two-stage axial flow pump impeller and guide vane adjustment device, comprising

[0006] A bracket, the bracket being coaxially fixedly disposed inside the pump end cover;

[0007] a first hydraulic cylinder, the first hydraulic cylinder being fixedly embedded in the bracket;

[0008] A base, the base is arranged inside the pump end cover and is coaxial with the bracket, the outer side wall of the base is fixedly connected to the base, the outer side wall of the base is fixedly connected to the blade, and an accommodating cavity is left between the base and the base;

[0009] The second hydraulic cylinder is fixedly embedded in the accommodating cavity, one end of the second hydraulic cylinder is connected with one end of the first hydraulic cylinder, and the other end of the second hydraulic cylinder is connected with the other end of the first hydraulic cylinder.

[0010] Preferably, an inner cavity is opened inside the bracket, the first hydraulic cylinder is fixedly embedded in the inner cavity, the first hydraulic cylinder is a cylinder-shaped hydraulic cylinder, a first hydraulic cylinder piston is slidingly arranged inside the first hydraulic cylinder, the first hydraulic cylinder piston divides the interior of the first hydraulic cylinder into an upper cavity and a lower cavity, the upper cavity is connected with one end of the second hydraulic cylinder, and the lower cavity is connected with the other end of the second hydraulic cylinder, the first hydraulic cylinder piston is fixedly connected to one end of the first hydraulic cylinder piston rod, the first hydraulic cylinder piston rod is slidably connected to the first hydraulic cylinder, and the other end of the first hydraulic cylinder piston rod is located outside the first hydraulic cylinder and is fixedly connected to a guide vane.

[0011] Preferably, the second hydraulic cylinder is a rod-shaped hydraulic cylinder, the outer side wall of the second hydraulic cylinder is transmission-connected with a rotating seat, the rotating seat is fixedly connected to the base, a second hydraulic cylinder piston is slidingly arranged inside the second hydraulic cylinder, the second hydraulic cylinder piston divides the interior of the second hydraulic cylinder into a left chamber and a right chamber, a second hydraulic cylinder piston rod is fixedly passed through the center of the second hydraulic cylinder piston, both ends of the second hydraulic cylinder piston rod are fixedly connected to the two inner side walls of the accommodating chamber, the left chamber is connected to the lower chamber, and the right chamber is connected to the upper chamber.

[0012] Preferably, the upper cavity is provided with a fourth flow hole, the fourth flow hole is connected to one end of the second flow hole, the second flow hole is provided in the bracket, the other end of the second flow hole is connected to one end of the first connecting pipe, the other end of the first connecting pipe is connected to one end of the first flow hole, the first flow hole is provided in the pump end cover, and the other end of the first flow hole is connected to the space on the right side of the blade.

[0013] Preferably, a ninth flow hole is provided at the right end of the piston rod of the second hydraulic cylinder, one end of the ninth flow hole is connected to the right cavity, the other end of the ninth flow hole is connected to one end of the third connecting pipe, the other end of the third connecting pipe is connected to one end of the seventh flow hole, the seventh flow hole is provided in the base, and the other end of the seventh flow hole is connected to the space on the right side of the blade.

[0014] Preferably, the lower cavity is provided with a fifth through-hole, the fifth through-hole is connected with one end of the third through-hole, the third through-hole is provided in the bracket, and the other end of the third through-hole is connected with the space on the left side of the blade.

[0015] Preferably, an eighth flow hole is provided at the left end of the piston rod of the second hydraulic cylinder, one end of the eighth flow hole is connected to the left cavity, the other end of the eighth flow hole is connected to one end of the second connecting pipe, the other end of the second connecting pipe is connected to one end of the sixth flow hole, the sixth flow hole is provided in the base, and the other end of the sixth flow hole is connected to the space on the left side of the blade.

[0016] Preferably, a shaft is coaxially fixedly provided inside the base, and an impeller nut is coaxially fixedly connected to the end of the base.

[0017] Compared with the prior art, the present invention has the following advantages and technical effects:

[0018] The present invention can optimize the flow state of the two-stage bidirectional axial flow pump when it has bidirectional inflow, thereby improving the hydraulic efficiency of the pump, reducing energy loss, achieving green environmental protection and energy conservation and emission reduction, which will greatly broaden the product's application areas and places and enhance the product's flexibility of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive work.

[0020] Figure 1 This is a structural diagram of the inlet section of the present invention;

[0021] Figure 2 This is a schematic diagram of the blade segment structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the position of the left end of the present invention when the flow comes in;

[0023] Figure 4 This is a schematic diagram of the position of the right end of the present invention when the flow comes in;

[0024] Figure 5 It is a schematic diagram of the overall structure of the present invention.

[0025] Among them, 1. pump end cover; 2. bracket; 3. guide vane; 4. first hydraulic cylinder; 5. first hydraulic cylinder piston rod; 6. first hydraulic cylinder piston; 7. first connecting pipe; 8. impeller nut; 9. base; 10. shaft; 11. blade; 12. base; 13. rotating seat; 14. second connecting pipe; 15. second hydraulic cylinder; 16. second hydraulic cylinder piston rod; 17. second hydraulic cylinder piston; 18. third connecting pipe; 101. first flow hole; 201. second flow hole; 202. third flow hole; 203. inner cavity; 401. fourth flow hole; 402. fifth flow hole; 1201. sixth flow hole; 1202. seventh flow hole; 1601. eighth flow hole; 1602. ninth flow hole. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] Reference Figures 1 to 5 As shown, the present invention provides a two-stage axial flow pump impeller and guide vane adjustment device, including

[0029] Bracket 2, bracket 2 is coaxially fixedly arranged inside the pump end cover 1;

[0030] A first hydraulic cylinder 4, which is fixedly embedded in the bracket 2;

[0031] Base 9, which is arranged inside the pump end cover 1 and coaxial with the bracket 2, has an outer wall of the base 9 fixedly connected to a base 12, and an outer wall of the base 12 fixedly connected to a blade 11, with an accommodating cavity left between the base 9 and the base 12;

[0032] The second hydraulic cylinder 15 is fixedly embedded in the accommodating cavity. One end of the second hydraulic cylinder 15 is connected to one end of the first hydraulic cylinder 4 , and the other end of the second hydraulic cylinder 15 is connected to the other end of the first hydraulic cylinder 4 .

[0033] A further optimized solution is provided, in which an inner cavity 203 is opened inside the bracket 2, and the first hydraulic cylinder 4 is fixedly embedded in the inner cavity 203. The first hydraulic cylinder 4 is a cylinder-shaped hydraulic cylinder, and a first hydraulic cylinder piston 6 is slidingly arranged inside the first hydraulic cylinder 4. The first hydraulic cylinder piston 6 divides the interior of the first hydraulic cylinder 4 into an upper cavity and a lower cavity. The upper cavity is connected with one end of the second hydraulic cylinder 15, and the lower cavity is connected with the other end of the second hydraulic cylinder 15. The first hydraulic cylinder piston 6 is fixedly connected with one end of the first hydraulic cylinder piston rod 5, and the first hydraulic cylinder piston rod 5 is slidingly connected with the first hydraulic cylinder 4. The other end of the first hydraulic cylinder piston rod 5 is located outside the first hydraulic cylinder 4 and is fixedly connected with the guide vane 3.

[0034] The maximum outer diameter of the guide vane 3 is smaller than the inner diameter of the inner cavity 203 .

[0035] Further optimization scheme, the second hydraulic cylinder 15 is a rod-shaped hydraulic cylinder, the outer side wall of the second hydraulic cylinder 15 is transmission-connected with the rotating seat 13, the rotating seat 13 is fixedly connected to the base 12, and a second hydraulic cylinder piston 17 is slidingly arranged inside the second hydraulic cylinder 15. The second hydraulic cylinder piston 17 divides the interior of the second hydraulic cylinder 15 into a left chamber and a right chamber. A second hydraulic cylinder piston rod 16 is fixedly passed through the center of the second hydraulic cylinder piston 17. The two ends of the second hydraulic cylinder piston rod 16 are fixedly connected to the two inner side walls of the accommodating chamber. The left chamber is connected to the lower chamber, and the right chamber is connected to the upper chamber.

[0036] The rotating seat 13 is connected to the second hydraulic cylinder 15 in a transmission manner. When the second hydraulic cylinder 15 moves left and right, the rotating seat 13 drives the base 12 and the blade 11 to perform circular motion. The rotating seat 13 and the second hydraulic cylinder 15 are connected in a worm gear transmission manner. The horizontal movement process of the second hydraulic cylinder 15 can drive the rotating seat 13 to rotate. The worm gear transmission connection method is an existing technology and will not be repeated here.

[0037] To further optimize the solution, the upper cavity is provided with a fourth flow hole 401, the fourth flow hole 401 is connected to one end of the second flow hole 201, the second flow hole 201 is provided in the bracket 2, the other end of the second flow hole 201 is connected to one end of the first connecting pipe 7, the other end of the first connecting pipe 7 is connected to one end of the first flow hole 101, the first flow hole 101 is provided in the pump end cover 1, and the other end of the first flow hole 101 is connected to the space on the right side of the blade 11.

[0038] To further optimize the solution, a ninth flow hole 1602 is provided at the right end of the second hydraulic cylinder piston rod 16, one end of the ninth flow hole 1602 is connected to the right cavity, the other end of the ninth flow hole 1602 is connected to one end of the third connecting tube 18, the other end of the third connecting tube 18 is connected to one end of the seventh flow hole 1202, the seventh flow hole 1202 is provided in the base 12, and the other end of the seventh flow hole 1202 is connected to the space on the right side of the blade 11.

[0039] To further optimize the solution, the lower cavity is provided with a fifth flow hole 402 , which is connected to one end of the third flow hole 202 . The third flow hole 202 is provided in the bracket 2 , and the other end of the third flow hole 202 is connected to the space on the left side of the blade 11 .

[0040] To further optimize the solution, an eighth flow hole 1601 is provided at the left end of the second hydraulic cylinder piston rod 16, one end of the eighth flow hole 1601 is connected to the left cavity, the other end of the eighth flow hole 1601 is connected to one end of the second connecting tube 14, the other end of the second connecting tube 14 is connected to one end of the sixth flow hole 1201, the sixth flow hole 1201 is provided in the base 12, and the other end of the sixth flow hole 1201 is connected to the space on the left side of the blade 11.

[0041] According to a further optimized solution, a shaft 10 is coaxially fixedly provided inside the base 9 , and an impeller nut 8 is coaxially fixedly connected to the end of the base 9 .

[0042] The working process of the present invention is as follows:

[0043] The pressure at the right end of the blade 11 is transmitted to the right chamber of the second hydraulic cylinder 15 through the seventh through-hole 1202, the third connecting pipe 18, and the ninth through-hole 1602;

[0044] The pressure at the left end of the blade 11 is transmitted to the left chamber of the second hydraulic cylinder 15 through the sixth through-hole 1201 , the second connecting pipe 14 , and the eighth through-hole 1601 .

[0045] The pressure at the right end of the blade 11 is transmitted to the upper chamber of the first hydraulic cylinder 4 through the first through-hole 101, the first connecting pipe 7, the second through-hole 201, and the fourth through-hole 401;

[0046] The pressure at the left end of the blade 11 is transmitted to the lower chamber of the first hydraulic cylinder 4 through the third through-flow hole 202 and the fifth through-flow hole 402 .

[0047] The pump conveying medium flows from left to right, that is, when the blade 11 at the left end of the unit is used as a primary impeller, the blade 11 plays a primary pressurizing role, and the pressure at the right end of the blade 11 is greater than the pressure at the left end of the blade 11.

[0048] The piston rod 16 of the second hydraulic cylinder is fixed, and the second hydraulic cylinder 15 is located at the rightmost side under the action of two forces. At this time, the angle of the blade 11 is the optimal inlet angle when the flow comes from the left end.

[0049] The first hydraulic cylinder 4 is fixed. Under the action of the pressure difference, the first hydraulic cylinder piston rod 5 and the first hydraulic cylinder piston 6 are located at the bottom of the cylinder, driving the guide vanes 3 to be located within the inner cavity 203. At this time, the guide vanes 3 occupy the smallest space in the inlet main flow channel and do not affect the inlet flow state of the unit's main flow.

[0050] At this time, the hydraulic efficiency of the unit is optimal.

[0051] Similarly, when the pump conveying medium flows from right to left, that is, when the blade 11 at the left end of the unit is used as a secondary impeller, the blade 11 plays a secondary pressurizing role, and the pressure at the right end of the blade 11 is less than the pressure at the left end of the blade 11.

[0052] The second hydraulic cylinder piston rod 16 and the second hydraulic cylinder 15 are positioned to the far left under the action of the two forces. At this point, the angle of the blade 11 is the optimal inlet angle for right-hand inflow. The second hydraulic cylinder 15 moves horizontally from right to left. Through the worm gear transmission between the outer wall of the second hydraulic cylinder 15 and the rotating base 13, the rotating base 13 rotates, driving the base 12 to rotate. In this final position, the angle of the blade 11 is the optimal inlet angle for right-hand inflow.

[0053] First hydraulic cylinder 4 is fixed. Under the influence of a pressure differential, first hydraulic cylinder piston rod 5 and first hydraulic cylinder piston 6 are located at the top of the cylinder, driving guide vanes 3 upward. At this point, guide vanes 3 occupy the largest space in the main inlet channel, guiding the incoming flow of the unit, optimizing the outgoing flow, and improving the hydraulic efficiency of the unit.

[0054] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0055] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection of the present invention.

Claims

1. A two-stage axial flow pump impeller and guide vane adjustment device, characterized in that: include A bracket (2), wherein the bracket (2) is coaxially fixedly arranged inside the pump end cover (1); a first hydraulic cylinder (4), the first hydraulic cylinder (4) being fixedly embedded in the bracket (2); A base (9), the base (9) being arranged inside the pump end cover (1) and being coaxial with the bracket (2), the outer wall of the base (9) being fixedly connected to a base (12), the outer wall of the base (12) being fixedly connected to a blade (11), and an accommodating cavity being reserved between the base (9) and the base (12); a second hydraulic cylinder (15), the second hydraulic cylinder (15) being fixedly embedded in the accommodating cavity, one end of the second hydraulic cylinder (15) being communicated with one end of the first hydraulic cylinder (4), and the other end of the second hydraulic cylinder (15) being communicated with the other end of the first hydraulic cylinder (4); An inner cavity (203) is provided inside the bracket (2), and the first hydraulic cylinder (4) is fixedly embedded in the inner cavity (203). The first hydraulic cylinder (4) is a cylinder-shaped hydraulic cylinder. A first hydraulic cylinder piston (6) is slidably provided inside the first hydraulic cylinder (4). The first hydraulic cylinder piston (6) divides the interior of the first hydraulic cylinder (4) into an upper cavity and a lower cavity. The upper cavity is communicated with one end of the second hydraulic cylinder (15), and the lower cavity is communicated with the other end of the second hydraulic cylinder (15). The first hydraulic cylinder piston (6) is fixedly connected to one end of a first hydraulic cylinder piston rod (5). The first hydraulic cylinder piston rod (5) is slidably connected to the first hydraulic cylinder (4). The other end of the first hydraulic cylinder piston rod (5) is located outside the first hydraulic cylinder (4) and is fixedly connected to a guide vane (3). The second hydraulic cylinder (15) is a rod-type hydraulic cylinder. The outer wall of the second hydraulic cylinder (15) is connected to a rotating seat (13) in a transmission manner. The rotating seat (13) is fixedly connected to the base (12). A second hydraulic cylinder piston (17) is slidably provided inside the second hydraulic cylinder (15). The second hydraulic cylinder piston (17) divides the interior of the second hydraulic cylinder (15) into a left chamber and a right chamber. A second hydraulic cylinder piston rod (16) is fixedly passed through the center of the second hydraulic cylinder piston (17). Both ends of the second hydraulic cylinder piston rod (16) are fixedly connected to the two inner side walls of the accommodating chamber. The left chamber is communicated with the lower chamber, and the right chamber is communicated with the upper chamber. The left chamber and the lower chamber are in communication with the space on the left side of the blade (11), and the right chamber and the upper chamber are in communication with the space on the right side of the blade (11).

2. A two-stage axial flow pump impeller and guide vane adjustment device according to claim 1, characterized in that: The upper cavity is provided with a fourth flow hole (401), the fourth flow hole (401) is connected to one end of the second flow hole (201), the second flow hole (201) is provided in the bracket (2), the other end of the second flow hole (201) is connected to one end of the first connecting pipe (7), the other end of the first connecting pipe (7) is connected to one end of the first flow hole (101), the first flow hole (101) is provided in the pump end cover (1), and the other end of the first flow hole (101) is connected to the space on the right side of the blade (11).

3. A two-stage axial flow pump impeller and guide vane adjustment device according to claim 2, characterized in that: A ninth flow hole (1602) is provided at the right end of the piston rod (16) of the second hydraulic cylinder. One end of the ninth flow hole (1602) is connected to the right cavity. The other end of the ninth flow hole (1602) is connected to one end of the third connecting tube (18). The other end of the third connecting tube (18) is connected to one end of the seventh flow hole (1202). The seventh flow hole (1202) is provided in the base (12). The other end of the seventh flow hole (1202) is connected to the space on the right side of the blade (11).

4. A two-stage axial flow pump impeller and guide vane adjustment device according to claim 1, characterized in that: The lower cavity is provided with a fifth through-flow hole (402), the fifth through-flow hole (402) is connected to one end of a third through-flow hole (202), the third through-flow hole (202) is provided in the bracket (2), and the other end of the third through-flow hole (202) is connected to the space on the left side of the blade (11).

5. The two-stage axial flow pump impeller and guide vane adjustment device according to claim 4, characterized in that: An eighth flow hole (1601) is provided at the left end of the piston rod (16) of the second hydraulic cylinder. One end of the eighth flow hole (1601) is connected to the left cavity. The other end of the eighth flow hole (1601) is connected to one end of the second connecting pipe (14). The other end of the second connecting pipe (14) is connected to one end of the sixth flow hole (1201). The sixth flow hole (1201) is provided in the base (12). The other end of the sixth flow hole (1201) is connected to the space on the left side of the blade (11).

6. The two-stage axial flow pump impeller and guide vane adjustment device according to claim 1, characterized in that: A shaft (10) is coaxially fixedly provided inside the base (9), and an impeller nut (8) is coaxially fixedly connected to the end of the base (9).

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