CN111810440B

CN111810440B - Centrifugal water pump

Info

Publication number: CN111810440B
Application number: CN202010630975.8A
Authority: CN
Inventors: 陈少同; 姜桂梅; 马玉英
Original assignee: Shanghai Liancheng Group Suzhou Co Ltd
Current assignee: Shanghai Liancheng Group Suzhou Co Ltd
Priority date: 2020-07-03
Filing date: 2020-07-03
Publication date: 2021-08-10
Anticipated expiration: 2040-07-03
Also published as: CN111810440A

Abstract

The invention discloses a centrifugal water pump, which comprises a pump body, wherein a pump cavity is arranged in the pump body, a pump cover is fixedly arranged at an opening at the right end of the pump cavity, a power shaft with the left end extending into the pump cavity is rotationally connected in the pump cover, and a water inlet pipeline and a water outlet pipeline are arranged on the side surface of the pump body; a wheel shell is arranged at the left end of the power shaft, a shaft hole is formed in the wheel shell at the left end of the power shaft, a shaft lever is rotatably connected in the shaft hole, and a fluted disc positioned in the wheel shell is arranged at the left end of the shaft lever; a cover plate is fixedly arranged at an opening at the left end of the wheel shell, and a plurality of rotating shafts are rotatably connected between the cover plate and the right end of the wheel shell; each rotating shaft is fixedly provided with a gear, each rotating shaft is fixedly provided with a connecting plate, each connecting plate is provided with an arc-shaped blade, and the side surface of the wheel shell is provided with a sliding groove for the arc-shaped blade to extend into; an adjusting component for driving the shaft rod to rotate is arranged in the pump cavity; the centrifugal water pump is simple in structure and adjustable in discharge capacity.

Description

Centrifugal water pump

Technical Field

The invention belongs to the technical field of centrifugal pumps, and particularly relates to a variable-displacement centrifugal water pump.

Background

The centrifugal pump is a machine for conveying liquid or pressurizing liquid, transfers the mechanical energy of a prime motor or other external energy to the liquid to increase the energy of the liquid, is mainly used for conveying the liquid, such as water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, and can also convey the liquid, gas mixture and the liquid containing suspended solids; the technical parameters for measuring the performance of the centrifugal pump include flow, suction lift, shaft power, water power, efficiency and the like. The existing centrifugal pump can only change the discharge capacity of the pump by adjusting the rotating speed, which not only influences the efficiency of the pump and the lift of the pump, but also needs a speed adjusting mechanism to control. Because speed adjusting mechanisms such as frequency converters are expensive, when different flow rates are needed, the control is widely adopted by changing pipeline characteristics through a throttle valve, and a large amount of energy is wasted.

Disclosure of Invention

The invention aims to provide a centrifugal water pump which is simple in structure and adjustable in discharge capacity.

In order to achieve the purpose, the invention provides the following technical scheme:

a centrifugal water pump comprises a pump body, wherein a pump cavity is arranged in the pump body, a pump cover is fixedly installed at the opening of the right end of the pump cavity, a power shaft with the left end extending into the pump cavity is rotatably connected in the pump cover, a water inlet pipeline is arranged on the side surface of the pump body along the axial direction of the power shaft, and a water outlet pipeline is arranged along the direction perpendicular to the power shaft; a wheel shell with an opening at the left end is arranged at the left end of the power shaft, a shaft hole is formed in the left end of the power shaft in the wheel shell, a shaft lever is rotatably connected in the shaft hole, and a fluted disc positioned in the wheel shell is arranged at the left end of the shaft lever; a cover plate is fixedly arranged at an opening at the left end of the wheel shell, a plurality of rotating shafts are uniformly and rotatably connected between the cover plate and the right end of the wheel shell at intervals along the circumferential direction of the shaft lever, and each rotating shaft is parallel to the power shaft; a gear meshed with the fluted disc is fixedly arranged on each rotating shaft, a connecting plate is fixedly arranged on each rotating shaft, an arc-shaped blade taking the rotating shaft as the center is arranged at one end of each connecting plate far away from the rotating shaft, and a sliding groove for the arc-shaped blade to extend into is formed in the side surface of the wheel shell; when the rotating shaft rotates, the plurality of arc-shaped blades are driven to extend out of or retract into the wheel shell through the meshing of the fluted disc and the gear; an adjusting component used for driving the shaft rod to rotate is arranged in the pump cavity.

Furthermore, when the arc-shaped blades are completely extended out of the wheel casing, the discharge capacity of the centrifugal water pump is the largest, and when the arc-shaped blades are completely retracted into the wheel casing, the discharge capacity of the centrifugal water pump is the smallest.

Furthermore, the adjusting assembly comprises an electric push rod, the power shaft is fixedly provided with a housing on the right side of the wheel housing, the outer side of the circumference of the power shaft is provided with a cutting groove communicated with the shaft hole, the right end of the shaft rod is provided with a lug extending into the cutting groove, the electric push rod is fixedly arranged in the housing, a limiting groove is arranged in the lug along the radial direction of the shaft rod, and the telescopic end of the electric push rod is provided with a convex column extending into the limiting groove; when the electric push rod is completely extended out, the arc-shaped blade is completely extended out of the wheel shell, and when the electric push rod is completely retracted, the arc-shaped blade is completely retracted into the wheel shell.

Further, the lower extreme fixed mounting of the pump body has the base.

Furthermore, a sealing ring is arranged on the outer side of the power shaft in the pump cover.

Furthermore, a rotary groove is formed in the right end of the pump cover on the outer side of the power shaft, a convex shoulder extending into the rotary groove is radially arranged on the outer side of the power shaft, a plug used for preventing the convex shoulder from being separated from the rotary groove is fixedly arranged at the opening of the right end of the rotary shaft, and the plug is sleeved on the power shaft.

Advantageous effects

Compared with the prior art, the technical scheme of the invention has the following advantages:

according to the invention, the fluted disc can be controlled to rotate by changing the extending distance of the electric push rod, so that the gear is controlled to drive the connecting plate to rotate to change the extending length of the arc-shaped blade, and the displacement is changed; when the centrifugal pump is not required to output flow, the invention can control the arc-shaped blades to be completely retracted and does not output water, thereby playing the role of energy saving.

Drawings

FIG. 1 is a cross-sectional view of the present invention with the arcuate vanes fully extended;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;

FIG. 4 is a cross-sectional view of the present invention with the curved vanes fully retracted;

FIG. 5 is a cross-sectional view B-B of FIG. 1 with the curved vanes fully retracted.

Detailed Description

Referring to fig. 1-5, a centrifugal water pump includes a pump body 1, a pump cavity 101 is provided in the pump body 1, a pump cover 3 is fixedly installed at an opening at a right end of the pump cavity 101, a power shaft 2 with a left end extending into the pump cavity 101 is rotatably connected to the pump cover 3, a water inlet pipe 102 is provided along an axial direction of the power shaft 2 on a side surface of the pump body 1, and a water outlet pipe 103 is provided along a direction perpendicular to the power shaft 2; a wheel shell 21 with an open left end is arranged at the left end of the power shaft 2, a shaft hole 22 is arranged at the left end of the power shaft 2 in the wheel shell 21, a shaft lever 6 is rotatably connected in the shaft hole 22, and a fluted disc 61 positioned in the wheel shell 21 is arranged at the left end of the shaft lever 6; a cover plate 5 is fixedly installed at an opening at the left end of the wheel shell 21, four rotating shafts 71 are uniformly and rotatably connected between the cover plate 5 and the right end of the wheel shell 21 at intervals along the circumferential direction of the shaft lever 6, and each rotating shaft 71 is parallel to the power shaft 2; each rotating shaft 71 is fixedly provided with a gear 7 meshed with the fluted disc 61, each rotating shaft 71 is fixedly provided with a connecting plate 82, one end of each connecting plate 82 far away from the rotating shaft 71 is provided with an arc-shaped blade 81 taking the rotating shaft 71 as the center, and the side surface of the wheel shell 21 is provided with a sliding groove 21a for the arc-shaped blade 81 to extend into; when the rotating shaft 71 rotates, the four arc-shaped blades 81 are driven to extend out of or retract into the wheel shell 21 through the meshing of the fluted disc 61 and the gear 7; an adjusting component for driving the shaft 6 to rotate is arranged in the pump cavity 101. The discharge capacity of the centrifugal water pump is maximized when the arc-shaped blades 81 are completely extended out of the wheel housing 21, and is minimized when the arc-shaped blades 81 are completely retracted into the wheel housing 21.

The adjusting assembly comprises an electric push rod 9, a housing 4 is fixedly arranged on the right side of a wheel shell 21 of the power shaft 2, a cutting groove 2a communicated with a shaft hole 22 is formed in the outer side of the circumference of the power shaft 2, a convex block 23 extending into the cutting groove 2a is arranged at the right end of the shaft lever 6, the electric push rod 9 is fixedly arranged in the housing 4, a limiting groove 24 is formed in the convex block 23 along the radial direction of the shaft lever 6, and a convex column 91 extending into the limiting groove 24 is arranged at the telescopic end of the electric push rod 9; when the electric push rod 9 is fully extended, the arc-shaped blade 81 is fully extended out of the wheel housing 21, and when the electric push rod 9 is fully retracted, the arc-shaped blade 81 is fully retracted into the wheel housing 21.

The lower end of the pump body 1 is fixedly provided with a base 104. And a sealing ring 2b is arranged on the outer side of the power shaft 2 in the pump cover 3. The right end of the pump cover 3 is provided with a rotary groove 31 on the outer side of the power shaft 2, the outer side of the power shaft 2 is provided with a convex shoulder 25 extending into the rotary groove 31 along the radial direction, a plug 32 for preventing the convex shoulder 25 from separating from the rotary groove 31 is fixedly arranged at the opening of the right end of the rotating shaft 71, and the plug 32 is sleeved on the power shaft 2.

When the invention works, the power shaft 2 drives the wheel shell 21 to rotate, and the wheel shell 21 drives the arc-shaped blades 81 to rotate when rotating, so that the water inlet pipeline 102 enters the pump cavity 101 and is discharged from the water outlet pipeline 103 through the arc-shaped blades 81. When the displacement of the water pump needs to be adjusted, the extending distance of the electric push rod 9 is controlled, the convex column 91 is matched with the limiting groove 24, the rotating shaft 71 is driven by the convex block 23 to rotate, the gear 7 is driven by the fluted disc 61 to rotate when the rotating shaft 71 rotates, the gear 7 drives the connecting rod to rotate through the rotating shaft 71, and the length of the arc-shaped blade 81 extending out of the wheel shell 21 is changed when the connecting plate 82 rotates around the rotating shaft 71; when the electric push rod 9 is fully extended, the arc-shaped blade 81 is fully extended out of the wheel shell 21, the displacement of the centrifugal water pump is maximum, and when the electric push rod 9 is fully retracted, the arc-shaped blade 81 is fully retracted into the wheel shell 21, and the displacement of the centrifugal water pump is minimum.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A centrifugal water pump comprises a pump body, wherein a pump cavity is arranged in the pump body, a pump cover is fixedly installed at the opening of the right end of the pump cavity, a power shaft with the left end extending into the pump cavity is rotatably connected in the pump cover, a water inlet pipeline is arranged on the side surface of the pump body along the axial direction of the power shaft, and a water outlet pipeline is arranged along the direction perpendicular to the power shaft; the gear is characterized in that a wheel shell with an opening at the left end is arranged at the left end of the power shaft, a shaft hole is formed in the left end of the power shaft in the wheel shell, a shaft lever is rotatably connected in the shaft hole, and a fluted disc positioned in the wheel shell is arranged at the left end of the shaft lever; a cover plate is fixedly arranged at an opening at the left end of the wheel shell, a plurality of rotating shafts are uniformly and rotatably connected between the cover plate and the right end of the wheel shell at intervals along the circumferential direction of the shaft lever, and each rotating shaft is parallel to the power shaft; a gear meshed with the fluted disc is fixedly arranged on each rotating shaft, a connecting plate is fixedly arranged on each rotating shaft, an arc-shaped blade taking the rotating shaft as the center is arranged at one end of each connecting plate far away from the rotating shaft, and a sliding groove for the arc-shaped blade to extend into is formed in the side surface of the wheel shell; when the rotating shaft rotates, the plurality of arc-shaped blades are driven to extend out of or retract into the wheel shell through the meshing of the fluted disc and the gear; an adjusting component for driving the shaft rod to rotate is arranged in the pump cavity;

the adjusting assembly comprises an electric push rod, the power shaft is fixedly provided with a housing on the right side of the wheel housing, the outer side of the circumference of the power shaft is provided with a cutting groove communicated with the shaft hole, the right end of the shaft rod is provided with a lug extending into the cutting groove, the electric push rod is fixedly arranged in the housing, a limiting groove is arranged in the lug along the radial direction of the shaft rod, and the telescopic end of the electric push rod is provided with a convex column extending into the limiting groove; when the electric push rod is completely extended out, the arc-shaped blade is completely extended out of the wheel shell, and when the electric push rod is completely retracted, the arc-shaped blade is completely retracted into the wheel shell.

2. The centrifugal water pump of claim 1, wherein a base is fixedly mounted to a lower end of the pump body.

3. The centrifugal water pump of claim 1, wherein a seal ring is provided inside the pump cover outside the power shaft.

4. The centrifugal water pump according to claim 1, wherein a rotary groove is formed in the right end of the pump cover on the outer side of the power shaft, a shoulder extending into the rotary groove is radially formed in the outer side of the power shaft, a plug for preventing the shoulder from separating from the rotary groove is fixedly arranged at the opening of the right end of the rotary shaft, and the plug is sleeved on the power shaft.