Impeller and guide vane adjusting device for two-stage axial flow pump

Abstract

An impeller and guide vane adjusting device for an axial flow pump comprises a bracket 2 coaxially and fixedly arranged in a pump end cover 1, a first hydraulic cylinder 4 fixedly embedded in the brac

Claims

1. An impeller and guide vane adjusting device for a two-stage axial flow pump, comprising:a bracket (2), wherein the bracket (2) is coaxially and fixedly arranged in a pump end cover (1);a first hydraulic cylinder (4), wherein the first hydraulic cylinder (4) is fixedly embedded in the bracket (2);a pedestal (9), wherein the pedestal (9) is arranged in the pump end cover (1) and coaxial with the bracket (2), and an outer side wall of the pedestal (9) is fixedly connected with a base (12), and an outer side wall of the base (12) is fixedly connected with blades (11), and an accommodating cavity is left between the pedestal (9) and the base (12); anda second hydraulic cylinder (15), wherein the second hydraulic cylinder (15) is fixedly embedded in the accommodating cavity, one end of the second hydraulic cylinder (15) is communicated with one end of the first hydraulic cylinder (4), and an other end of the second hydraulic cylinder (15) is communicated with an other end of the first hydraulic cylinder (4).

2. The impeller and guide vane adjusting device for the two-stage axial flow pump according to claim 1, wherein the bracket (2) is internally 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 body fixed hydraulic cylinder, and a first hydraulic cylinder piston (6) is slidably arranged in the first hydraulic cylinder (4); the first hydraulic cylinder piston (6) divides the first hydraulic cylinder (4) into an upper cavity and a lower cavity, wherein the upper cavity is communicated with one end of the second hydraulic cylinder (15), and the lower cavity is communicated with an 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), wherein the first hydraulic cylinder piston rod (5) is slidably connected with the first hydraulic cylinder (4), and an other end of the first hydraulic cylinder piston rod (5) is located outside the first hydraulic cylinder (4) and fixedly connected with a guide vane (3).

3. The impeller and guide vane adjusting device for the two-stage axial flow pump according to claim 2, wherein the second hydraulic cylinder (15) is a rod fixed hydraulic cylinder, an outer side wall of the second hydraulic cylinder (15) is in transmission connection with arotary seat (13), the rotary seat (13) is fixedly connected with the base (12), a second hydraulic cylinder piston (17) is slidably arranged in the second hydraulic cylinder (15), and the second hydraulic cylinder piston (17) divides interior of the second hydraulic cylinder (15) into a left cavity and a right cavity; a center of the second hydraulic cylinder piston (17) is fixedly penetrated with a second hydraulic cylinder piston rod (16), and both ends of the second hydraulic cylinder piston rod (16) are fixedly connected with two inner side walls of the accommodating cavity, the left cavity is communicated with the lower cavity, and the right cavity is communicated with the upper cavity.

4. The impeller and guide vane adjusting device for the two-stage axial flow pump according to claim 3, wherein the upper cavity is provided with a fourth through-flow hole (401), wherein the fourth through-flow hole (401) is communicated with one end of a second through-flow hole (201), and the second through-flow hole (201) is arranged in the bracket (2), and an other end of the second through-flow hole (201) is communicated with one end of a first connecting pipe (7), and an other end of the first connecting pipe (7) is communicated with one end of a first through-flow hole (101); the first through-flow hole (101) is arranged in the pump end cover (1), and an other end of the first through-flow hole (101) is communicated with a space on a right side of the blades (11).

5. The impeller and guide vane adjusting device for the two-stage axial flow pump according to claim 4, wherein a right end of the second hydraulic cylinder piston rod (16) is provided with a ninth through-flow hole (1602), and one end of the ninth through-flow hole (1602) is communicated with the right cavity, and an other end of the ninth through-flow hole (1602) is communicated with one end of a third connecting pipe (18); an other end of the third connecting pipe (18) is communicated with one end of a seventh through-flow hole (1202), the seventh through-flow hole (1202) is opened in the base (12), and an other end of the seventh through-flow hole (1202) is communicated with the space on the right side of the blades (11).

6. The impeller and guide vane adjusting device for the two-stage axial flow pump according to claim 3, wherein the lower cavity is provided with a fifth through-flow hole (402), and the fifth through-flow hole (402) is communicated with one end of a third through-flow hole (202), the third through-flow hole (202) is arranged in the bracket (2), and an other end of the third through-flow hole (202) is communicated with the space on a left side of the blades (11).

7. The impeller and guide vane adjusting device for the two-stage axial flow pump according to claim 6, wherein a left end of the second hydraulic cylinder piston rod (16) is provided with an eighth through-flow hole (1601), and one end of the eighth through-flow hole (1601) is communicated with the left cavity, an other end of the eighth through-flow hole (1601) 5 is communicated with one end of a second connecting pipe (14); an other end of the second connecting pipe (14) is communicated with one end of a sixth through-flow hole (1201), the sixth through-flow hole (1201) is opened in the base (12), and an other end of the sixth through-flow hole (1201) is communicated with a space on a left side of the blades (11).

8. The impeller and guide vane adjusting device for the two-stage axial flow pump 10 according to claim 1, wherein a shaft (10) is coaxially and fixedly penetrated in the pedestal (9), and an impeller nut (8) is coaxially and fixedly connected to an end of the pedestal (9).

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