Dual-stage axial flow pump impeller and guide vane adjustment device

Abstract

A dual-stage axial flow pump impeller and guide vane adjustment device comprises a support (2), a first hydraulic cylinder (4), a base (9), and a second hydraulic cylinder (15), wherein the support (2) is coaxially fixedly arranged inside a pump end cover (1); the first hydraulic cylinder (4) is fixedly embedded inside the support (2); the base (9) is arranged inside the pump end cover (1) and is coaxial with the support (2); a mount (12) is fixedly connected to the outer side wall of the base (9); vanes (11) are fixedly connected to the outer side wall of the mount (12); an accommodating cavity is reserved between the base (9) and the mount (12); and the second hydraulic cylinder (15) is fixedly embedded in the accommodating cavity, one end of the second hydraulic cylinder (15) is in communication with one end of the first hydraulic cylinder (4), and the other end of the second hydraulic cylinder (15) is in communication with the other end of the first hydraulic cylinder (4). The adjustment device can optimize the flow state under inflow conditions, thereby improving the hydraulic efficiency of a pump.

Description

Double-stage axial flow pump impeller and guide vane adjusting device TECHNICAL FIELD

[0001] The present application belongs to the technical field of fluid machinery, and particularly relates to a double-stage axial flow pump impeller and guide vane adjusting device. BACKGROUND

[0002] The double-stage bidirectional axial flow pump is a special form of axial flow pump that realizes bidirectional pumping of medium through forward and reverse rotation. In the existing double-stage bidirectional axial flow pump, the arrangement form of the impeller and the guide vane is only applicable to unidirectional medium flow. When the medium is transported in the reverse direction, the arrangement form of the impeller and the guide vane is not conducive to flow optimization, reduces the hydraulic efficiency, and causes energy loss.

[0003] Therefore, it is necessary to design a double-stage axial flow pump impeller and guide vane adjusting device to solve the above problems.

[0004] SUMMARY

[0005] The purpose of the present application is to provide a double-stage axial flow pump impeller and guide vane adjusting device to solve the above problems and achieve the purpose of improving hydraulic efficiency and reducing energy loss.

[0006] To achieve the above purpose, the present application provides the following scheme: a double-stage axial flow pump impeller and guide vane adjusting device, comprising

[0007] A support is coaxially fixedly arranged inside a pump end cover;

[0008] A first hydraulic cylinder is fixedly embedded inside the support;

[0009] A base is arranged inside the pump end cover and coaxial with the support, an outer side wall of the base is fixedly connected with a pedestal, an outer side wall of the pedestal is fixedly connected with a blade, and a containing cavity is left between the base and the pedestal;

[0010] A second hydraulic cylinder is fixedly embedded in the containing cavity, one end of the second hydraulic cylinder is in communication with one end of the first hydraulic cylinder, and the other end of the second hydraulic cylinder is in communication with the other end of the first hydraulic cylinder.

[0011] Preferably, the inside of the support is provided with an inner cavity, 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 slidably arranged in the first hydraulic cylinder, the first hydraulic cylinder piston divides the inside of the first hydraulic cylinder into an upper cavity and a lower cavity, the upper cavity is in communication with one end of the second hydraulic cylinder, the lower cavity is in communication with the other end of the second hydraulic cylinder, the first hydraulic cylinder piston is fixedly connected with one end of a first hydraulic cylinder piston rod, the first hydraulic cylinder piston rod is slidably connected with 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 with a guide vane.

[0012] Preferably, the second hydraulic cylinder is a rod-shaped hydraulic cylinder, a rotating seat is in transmission connection with the outer side wall of the second hydraulic cylinder, the rotating seat is fixedly connected with the base, a second hydraulic cylinder piston is slidably arranged in the second hydraulic cylinder, the second hydraulic cylinder piston divides the inside of the second hydraulic cylinder into a left cavity and a right cavity, a second hydraulic cylinder piston rod is fixedly arranged in the center of the second hydraulic cylinder piston, and both ends of the second hydraulic cylinder piston rod are fixedly connected with the two inner side walls of the containing cavity. The left cavity is in communication with the lower cavity, and the right cavity is in communication with the upper cavity.

[0013] Preferably, the upper cavity is provided with a fourth flow hole, one end of a second flow hole is in communication with the fourth flow hole, the second flow hole is arranged in the support, one end of a first connecting pipe is in communication with the other end of the second flow hole, one end of a first flow hole is in communication with the other end of the first connecting pipe, the first flow hole is arranged in the pump end cover, and the other end of the first flow hole is in communication with the space on the right side of the blade.

[0014] Preferably, a ninth flow hole is arranged at the right end of the second hydraulic cylinder piston rod, one end of the ninth flow hole is in communication with the right cavity, one end of a third connecting pipe is in communication with the other end of the ninth flow hole, one end of a seventh flow hole is in communication with the other end of the third connecting pipe, the seventh flow hole is arranged in the base, and the other end of the seventh flow hole is in communication with the space on the right side of the blade.

[0015] Preferably, the lower cavity is provided with a fifth flow hole, one end of a third flow hole is in communication with the fifth flow hole, the third flow hole is arranged in the support, and the other end of the third flow hole is in communication with the space on the left side of the blade.

[0016] Preferably, an eighth flow hole is arranged at the left end of the second hydraulic cylinder piston rod, one end of the eighth flow hole is in communication with the left cavity, one end of a second connecting pipe is in communication with the other end of the eighth flow hole, one end of a sixth flow hole is in communication with the other end of the second connecting pipe, the sixth flow hole is arranged in the base, and the other end of the sixth flow hole is in communication with the space on the left side of the blade.

[0017] Preferably, the base is internally coaxially fixed with a shaft, and the base end is coaxially fixedly connected with an impeller nut.

[0018] Compared with the prior art, the application has the following advantages and technical effects:

[0019] The application can optimize the flow state of the double-stage bidirectional axial flow pump when the double-stage bidirectional axial flow pump is in bidirectional inflow, thereby improving the hydraulic efficiency of the pump, reducing energy loss, realizing green environmental protection and energy saving and emission reduction, greatly widening the product use field and place, and enhancing the product use flexibility. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor:

[0021] Fig. 1 is a structure schematic diagram of an inlet section of the application;

[0022] Fig. 2 is a structure schematic diagram of a blade section of the application;

[0023] Fig. 3 is a position schematic diagram of the application when the left end is in flow;

[0024] Fig. 4 is a position schematic diagram of the application when the right end is in flow;

[0025] Fig. 5 is a whole structure schematic diagram of the application.

[0026] Among them, 1, pump end cover; 2, support; 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 through-flow hole; 201, second through-flow hole; 202, third through-flow hole; 203, inner cavity; 401, fourth through-flow hole; 402, fifth through-flow hole; 1201, sixth through-flow hole; 1202, seventh through-flow hole; 1601, eighth through-flow hole; 1602, ninth through-flow hole. DETAILED DESCRIPTION

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described, obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0028] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0029] Referring to FIGS. 1-5, the present application provides a two-stage axial flow pump impeller and guide vane adjusting device, comprising

[0030] The bracket 2 is coaxially fixedly arranged inside the pump end cover 1.

[0031] The first hydraulic cylinder 4 is fixedly embedded inside the bracket 2.

[0032] The base 9 is arranged inside the pump end cover 1 and coaxial with the bracket 2, the outer side wall of the base 9 is fixedly connected with the pedestal 12, the outer side wall of the pedestal 12 is fixedly connected with the blade 11, and the base 9 and the pedestal 12 are left with a containing cavity therebetween.

[0033] The second hydraulic cylinder 15 is fixedly embedded in the containing cavity, one end of the second hydraulic cylinder 15 is in communication with one end of the first hydraulic cylinder 4, and the other end of the second hydraulic cylinder 15 is in communication with the other end of the first hydraulic cylinder 4.

[0034] Further optimization scheme, the bracket 2 is provided with an inner cavity 203, the first hydraulic cylinder 4 is fixedly embedded in the inner cavity 203, the first hydraulic cylinder 4 is a cylinder-shaped hydraulic cylinder, the first hydraulic cylinder 4 is provided with a first hydraulic cylinder piston 6 slidingly inside, the first hydraulic cylinder piston 6 separates the first hydraulic cylinder 4 into an upper cavity and a lower cavity, the upper cavity is in communication with one end of the second hydraulic cylinder 15, the lower cavity is in communication with the other end of the second hydraulic cylinder 15, the first hydraulic cylinder piston 6 is fixedly connected with one end of a first hydraulic cylinder piston rod 5, 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.

[0035] The maximum outer diameter of the guide vane 3 is smaller than the inner diameter of the inner cavity 203.

[0036] Further optimization scheme, the second hydraulic cylinder 15 is a rod type hydraulic cylinder, the outer side wall of the second hydraulic cylinder 15 is in transmission connection with a rotating seat 13, the rotating seat 13 is fixedly connected with the base 12, a second hydraulic cylinder piston 17 is slidably arranged in the second hydraulic cylinder 15, the second hydraulic cylinder piston 17 divides the inside of the second hydraulic cylinder 15 into a left cavity and a right cavity, a second hydraulic cylinder piston rod 16 is fixedly arranged at the center of the second hydraulic cylinder piston 17, the two ends of the second hydraulic cylinder piston rod 16 are fixedly connected with the two inner side walls of the accommodating cavity, the left cavity is in communication with the lower cavity, and the right cavity is in communication with the upper cavity.

[0037] The rotating seat 13 is in transmission connection with the second hydraulic cylinder 15, when the second hydraulic cylinder 15 moves left and right, the rotating seat 13 drives the base 12 and the blade 11 to move in a circle, the rotating seat 13 and the second hydraulic cylinder 15 are in transmission connection in a worm and gear mode, the horizontal movement of the second hydraulic cylinder 15 can drive the rotating seat 13 to rotate, and the transmission connection in the worm and gear mode is prior art, which will not be described here.

[0038] Further optimization scheme, the upper cavity is provided with a fourth flow hole 401, the fourth flow hole 401 is in communication with one end of a second flow hole 201, the second flow hole 201 is arranged in the support 2, the other end of the second flow hole 201 is in communication with one end of a first connecting pipe 7, the other end of the first connecting pipe 7 is in communication with one end of a first flow hole 101, the first flow hole 101 is arranged in the pump end cover 1, and the other end of the first flow hole 101 is in communication with a space on the right side of the blade 11.

[0039] Further optimization scheme, the right end of the second hydraulic cylinder piston rod 16 is provided with a ninth flow hole 1602, one end of the ninth flow hole 1602 is in communication with the right cavity, the other end of the ninth flow hole 1602 is in communication with one end of a third connecting pipe 18, the other end of the third connecting pipe 18 is in communication with one end of a seventh flow hole 1202, the seventh flow hole 1202 is arranged in the base 12, and the other end of the seventh flow hole 1202 is in communication with a space on the right side of the blade 11.

[0040] Further optimization scheme, the lower cavity is provided with a fifth flow hole 402, the fifth flow hole 402 is in communication with one end of a third flow hole 202, the third flow hole 202 is arranged in the support 2, and the other end of the third flow hole 202 is in communication with a space on the left side of the blade 11.

[0041] Further optimization scheme, the left end of the second hydraulic cylinder piston rod 16 is provided with an eighth flow hole 1601, one end of the eighth flow hole 1601 is in communication with the left cavity, the other end of the eighth flow hole 1601 is in communication with one end of a second connecting pipe 14, the other end of the second connecting pipe 14 is in communication with one end of a sixth flow hole 1201, the sixth flow hole 1201 is arranged in the base 12, and the other end of the sixth flow hole 1201 is in communication with a space on the left side of the blade 11.

[0042] Further optimization scheme, the base 9 inside coaxial fixed wear has the shaft 10, the base 9 end coaxial fixed connection has the impeller nut 8.

[0043] The working process of the present application is as follows:

[0044] The pressure at the right end of the blade 11 is transmitted to the right cavity of the second hydraulic cylinder 15 through the seventh through-flow hole 1202, the third connecting pipe 18 and the ninth through-flow hole 1602.

[0045] The pressure at the left end of the blade 11 is transmitted to the left cavity of the second hydraulic cylinder 15 through the sixth through-flow hole 1201, the second connecting pipe 14 and the eighth through-flow hole 1601.

[0046] The pressure at the right end of the blade 11 is transmitted to the upper cavity of the first hydraulic cylinder 4 through the first through-flow hole 101, the first connecting pipe 7, the second through-flow hole 201 and the fourth through-flow hole 401.

[0047] The pressure at the left end of the blade 11 is transmitted to the lower cavity of the first hydraulic cylinder 4 through the third through-flow hole 202 and the fifth through-flow hole 402.

[0048] The pump delivery 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 functions as a primary pressure booster, and the pressure at the right end of the blade 11 is greater than the pressure at the left end of the blade 11.

[0049] The second hydraulic cylinder piston rod 16 is fixed, and the second hydraulic cylinder 15 is located at the far right under the action of the two forces, and at this time the angle of the blade 11 is the optimal inlet angle when the flow comes from the left end.

[0050] The first hydraulic cylinder 4 is fixed, and 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 vane 3 to be located in the inner cavity 203. At this time, the guide vane 3 occupies the smallest space in the inlet main flow passage, and does not affect the inlet flow state of the main flow of the unit.

[0051] At this time, the hydraulic efficiency of the unit is best.

[0052] Similarly, the pump delivery 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 functions as a secondary pressure booster, and the pressure at the right end of the blade 11 is less than the pressure at the left end of the blade 11.

[0053] The second hydraulic cylinder piston rod 16, the second hydraulic cylinder 15 is located at the far left under the action of the two forces, and at this time the angle of the blade 11 is the optimal inlet angle when the flow comes from the right end. The second hydraulic cylinder 15 moves horizontally from right to left, and through the worm gear transmission between the outer wall of the second hydraulic cylinder 15 and the worm gear of the rotating seat 13, the rotating seat 13 rotates, driving the base 12 to rotate. In the final position of this state, the angle of the blade 11 is the optimal inlet angle when the flow comes from the right end.

[0054] The first hydraulic cylinder 4 is fixed, and under the action of pressure difference, the first hydraulic cylinder piston rod 5 and the first hydraulic cylinder piston 6 are located at the top of the cylinder, driving the guide vane 3 to move upward. At this time, the guide vane 3 occupies the largest space in the inlet main flow channel, plays a role of guiding flow to the flow of the unit, optimizes the flow state of the outflow, and improves the hydraulic efficiency of the unit.

[0055] In the description of the present application, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0056] The above-described embodiments are only descriptions of the preferred modes of the present application, and do not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements to the technical solutions of the present application made by those skilled in the art shall fall within the protection scope of the present application.

Claims

1. A dual stage axial flow pump impeller and guide vane regulating device, characterized by, The utility model relates to a pump end cover with hydraulic cylinder and guide vane, including Support (2), support (2) coaxial fixedly arranged in the inside of pump end cover (1); First hydraulic cylinder (4), first hydraulic cylinder (4) fixedly embedded in the inside of support (2); Base (9), base (9) is arranged in the inside of pump end cover (1) and is coaxial with support (2), the outside wall of base (9) is fixedly connected with base (12), the outside wall of base (12) is fixedly connected with vane (11), and the accommodation cavity is left between base (9) and base (12); Second hydraulic cylinder (15), second hydraulic cylinder (15) is fixedly embedded in the accommodation cavity, one end of second hydraulic cylinder (15) is communicated with one end of first hydraulic cylinder (4), and the other end of second hydraulic cylinder (15) is communicated with the other end of first hydraulic cylinder (4).

2. A dual stage axial flow pump impeller and guide vane regulating device according to claim 1 wherein, The inside of support (2) is provided with inner cavity (203), first hydraulic cylinder (4) is fixedly embedded in the inner cavity (203), first hydraulic cylinder (4) is cylinder type hydraulic cylinder, first hydraulic cylinder (4) is slidably provided with first hydraulic cylinder piston (6) in the inside, first hydraulic cylinder piston (6) divides the inside of first hydraulic cylinder (4) into upper chamber and lower chamber, the upper chamber is communicated with one end of second hydraulic cylinder (15), the lower chamber is communicated with the other end of second hydraulic cylinder (15), first hydraulic cylinder piston (6) is fixedly connected with one end of first hydraulic cylinder piston rod (5), first hydraulic cylinder piston rod (5) is slidably connected with first hydraulic cylinder (4), and the other end of first hydraulic cylinder piston rod (5) is located in the outside of first hydraulic cylinder (4) and is fixedly connected with guide vane (3).

3. A dual stage axial flow pump impeller and guide vane regulating device according to claim 2, characterised in that, Second hydraulic cylinder (15) is rod type hydraulic cylinder, the outside wall of second hydraulic cylinder (15) is drivingly connected with rotary seat (13), rotary seat (13) is fixedly connected with base (12), second hydraulic cylinder (15) is slidably provided with second hydraulic cylinder piston (17) in the inside, second hydraulic cylinder piston (17) divides the inside of second hydraulic cylinder (15) into left chamber and right chamber, second hydraulic cylinder piston (17) is fixedly provided with second hydraulic cylinder piston rod (16) in the centre, both ends of second hydraulic cylinder piston rod (16) are fixedly connected with both inside walls of the accommodation cavity, the left chamber is communicated with the lower chamber, and the right chamber is communicated with the upper chamber.

4. A dual stage axial flow pump impeller and guide vane regulating device according to claim 3, characterised in that, The upper chamber is provided with fourth through hole (401), the fourth through hole (401) is communicated with one end of second through hole (201), the second through hole (201) is arranged in support (2), one end of first connecting pipe (7) is communicated with the other end of second through hole (201), one end of first through hole (101) is communicated with the other end of first connecting pipe (7), the first through hole (101) is arranged in pump end cover (1), and the other end of first through hole (101) is communicated with the space on the right side of vane (11).

5. A dual stage axial flow pump impeller and guide vane regulating device according to claim 4 wherein, The right end of the second hydraulic cylinder piston rod (16) is provided with a ninth flow hole (1602), one end of the ninth flow hole (1602) is communicated with the right cavity, the other end of the ninth flow hole (1602) is communicated with one end of a third connecting pipe (18), the other end of the third connecting pipe (18) is communicated with one end of a seventh flow hole (1202), the seventh flow hole (1202) is arranged in the base (12), and the other end of the seventh flow hole (1202) is communicated with the space on the right side of the blade (11).

6. A dual stage axial flow pump impeller and guide vane regulating device according to claim 3 wherein, The lower cavity is provided with a fifth flow hole (402), one end of the fifth flow hole (402) is communicated with one end of a third flow hole (202), the third flow hole (202) is arranged in the support (2), and the other end of the third flow hole (202) is communicated with the space on the left side of the blade (11).

7. A dual stage axial flow pump impeller and guide vane regulating device according to claim 6 wherein, The left end of the second hydraulic cylinder piston rod (16) is provided with an eighth flow hole (1601), one end of the eighth flow hole (1601) is communicated with the left cavity, the other end of the eighth flow hole (1601) is communicated with one end of a second connecting pipe (14), the other end of the second connecting pipe (14) is communicated with one end of a sixth flow hole (1201), the sixth flow hole (1201) is arranged in the base (12), and the other end of the sixth flow hole (1201) is communicated with the space on the left side of the blade (11).

8. A dual stage axial flow pump impeller and guide vane regulating device according to claim 1 wherein, The inside of the base (9) is coaxially fixed with a shaft (10), and the end of the base (9) is coaxially fixedly connected with an impeller nut (8).

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