CN110671359A - Novel water pump impeller blade adjusting mechanism - Google Patents

Abstract

The invention discloses a novel water pump impeller blade adjusting mechanism which comprises a blade adjusting and controlling device, a motor, a pump shaft, an impeller body, blades and a servomotor, wherein the motor shaft is connected with the pump shaft, the motor shaft and the pump shaft are hollow shafts, the servomotor is fixed in a cavity formed at the joint of the hollow pump shaft and the impeller body, a pressure oil pipe penetrates through the hollow motor shaft and the pump shaft and then is connected with oil chambers above and below a piston in a cylinder body, the piston rod is a double-end piston rod, the lower end piston rod penetrates through a lower end cover and is connected with an operating frame, the operating frame is connected with the blades through a joint bearing and a crank arm, the top of the upper end piston rod is connected with a displacement feedback steel wire rope, and the displacement. The servomotor of the invention is arranged in the impeller body, and the piston rod of the servomotor is directly connected with the operating frame, thus eliminating the operating rod in the existing blade adjusting mechanism, reducing the cost and improving the angle adjusting precision and stability of the blades.

Description

Novel water pump impeller blade adjusting mechanism

Technical Field

The invention relates to a water pump impeller blade adjusting device.

Background

When the water pump works, in order to enable the water pump to be in an optimal working condition point, the angle of the blades of the water pump is adjusted in real time according to the change of flow and water level. The existing blade adjusting device adopts a servomotor arranged on the top of a motor or between a motor shaft and a main shaft, and is connected with an operating rod consisting of a motor pull rod, a pump shaft pull rod and a blade pull rod through a servomotor piston rod, and the operating rod penetrates through the main shaft to be connected with an operating frame in an impeller to drive blades to rotate. A series of problems arise due to the operating lever being too long. Firstly, the cost of the operating rod is high, the operating force of the water pump with large operating force reaches 100 tons, the length of the operating rod is 5-10 meters, and the requirements on the material, the manufacture and the processing of the operating rod are high. In addition, because the operating rod is too long, the operating force is also bidirectional stress, when the operating rod bears pressure and tension, the operating rod bends and stretches to deform, so that the adjustment precision is not required, the angle display of the blade is unstable, the fluctuation is large, and the serious conditions can cause difficult problems such as water pump vibration, noise, abnormal sound and the like.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a novel water pump impeller blade adjusting mechanism, a servomotor is arranged in an impeller body, an operating rod in the existing adjusting mechanism is omitted, and a piston rod of the servomotor is directly connected with an operating frame to drive blades to rotate.

The technical scheme adopted by the invention is as follows: a novel water pump impeller blade adjusting mechanism comprises a blade adjusting control device, a motor, a pump shaft, an impeller body, blades, a servomotor, an operating frame, a joint bearing and a crank arm, wherein the motor shaft is connected with the pump shaft, the motor shaft and the pump shaft are hollow shafts, the servomotor is fixed in a cavity formed at the joint of the hollow pump shaft and the impeller body and comprises a cylinder body, a piston arranged in the cylinder body and a piston rod connected with the piston, the cylinder body is fixed on a servomotor mounting seat in the inner cavity of the impeller body, a pressure oil pipe penetrates through the hollow motor shaft and the pump shaft and then is connected with an oil chamber above and below the piston in the cylinder body, the piston rod is a double-end piston rod, the lower end piston rod penetrates through a lower end cover and is connected with the operating frame, the operating frame is connected with the blades through the joint bearing and the crank arm, the, The rear part of the motor shaft is connected with a blade adjusting and controlling device arranged at the top of the motor, and the blade adjusting and controlling device drives the servomotor by controlling the delivery of pressure oil.

Furthermore, positioning pin holes are correspondingly arranged on the servomotor mounting seat and the servomotor cylinder body fixing surface and are connected through positioning pins.

According to the novel water pump impeller blade adjusting mechanism, the servomotor is arranged in the impeller body, the pressure oil pipe penetrates through the hollow motor shaft and the pump shaft to be connected with the servomotor, the servomotor piston rod is directly connected with the operating frame, the operating frame moves up and down under the action of the servomotor piston rod, the operating frame, the joint bearing and the crank arm are linked to drive the blades to rotate to achieve blade angle adjustment, an operating rod in the existing blade adjusting mechanism is omitted, cost is reduced, and blade angle adjusting precision and stability are improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Figure 2 is a partial schematic view of the impeller body portion of the present invention.

Detailed Description

In order to facilitate an understanding of the invention, the invention will be described more fully and in detail below with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.

As shown in fig. 1 and 2, the novel water pump impeller blade adjusting mechanism of this embodiment includes a blade adjusting and controlling device 1, a motor 2, a pump shaft 3, an impeller body 4, blades 5, a servomotor, an operation frame 7, a knuckle bearing 8, and a crank arm 9, wherein a motor shaft is connected to the pump shaft 3, the motor shaft and the pump shaft 3 are hollow shafts, the servomotor is fixed in a cavity formed at a connection between the hollow pump shaft and the impeller body, the servomotor includes a cylinder 601, a piston arranged in the cylinder, and a piston rod 602 connected to the piston, the cylinder 601 is fixed on a servomotor mounting seat in an inner cavity of the impeller body, and in order to improve positioning accuracy of the servomotor, positioning pin holes are correspondingly formed on fixing surfaces of the servomotor mounting seat and the servomotor cylinder body and connected by positioning pins 603. The blade angle increasing pressure side oil pipe 604 and the blade angle decreasing pressure side oil pipe 605 are respectively connected with an upper oil chamber and a lower oil chamber of a piston in a cylinder body after penetrating through a hollow motor shaft and a pump shaft 3, a piston rod 602 is a double-end piston rod, a lower end piston rod penetrates through a lower end cover to be connected with an operation frame 7, the operation frame 7 is connected with a blade 5 through a joint bearing 8 and a crank arm 9, the top of the upper end piston rod is connected with a displacement feedback steel wire rope 606, the displacement feedback steel wire rope 606 penetrates through the pump shaft 3 and the motor shaft and then is connected with a blade adjusting and controlling device 1 installed at the top of a motor 2, and the displacement feedback steel wire rope 606 feeds the. The blade adjusting and controlling device 1 controls pressure oil to be conveyed into a cylinder 601 of the servomotor through a blade angle increasing pressure side oil pipe 604 and a blade angle decreasing pressure side oil pipe 605, and a piston rod 602 acts to link a joint bearing 8 and a crank arm 9 to drive the blades 5 to rotate so as to realize blade angle adjustment.

Many modifications and other embodiments of the invention will come to mind to one skilled in the art to which this invention pertains having the benefit of the teachings presented in the foregoing descriptions and the associated drawings. Therefore, it is to be understood that the inventions are not to be limited to the specific embodiments disclosed and that modifications and other embodiments are intended to be included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims (2)

1. The utility model provides a novel water pump impeller blade adjustment mechanism, includes blade regulation controlling means, motor, pump shaft, impeller body, blade, servomotor, handling frame, joint bearing, turning arm, its characterized in that: the servomotor is fixed in a cavity formed at the joint of the hollow pump shaft and the impeller body, the servomotor comprises a cylinder body, a piston arranged in the cylinder body and a piston rod connected with the piston, the cylinder body is fixed on a servomotor mounting seat in the inner cavity of the impeller body, a pressure oil pipe penetrates through the hollow motor shaft and the pump shaft and then is connected with an oil chamber above and below the piston in the cylinder body, the piston rod is a double-end piston rod, the lower end piston rod penetrates through a lower end cover and is connected with an operation frame, the operation frame is connected with blades through a knuckle bearing and a crank arm, the top of the upper end piston rod is connected with a displacement feedback steel wire rope, the displacement feedback steel wire rope penetrates through the pump shaft and the motor shaft and then is connected with a blade adjusting and controlling device arranged at the top of the motor, and the blade adjusting.

2. The novel water pump impeller blade adjusting mechanism as claimed in claim 1, characterized in that: positioning pin holes are correspondingly arranged on the servomotor mounting seat and the servomotor cylinder body fixing surface and are connected through positioning pins.

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