CN212177490U

CN212177490U - Centrifugal pump device with adjustable blades

Info

Publication number: CN212177490U
Application number: CN202020596839.7U
Authority: CN
Inventors: 王康兵; 王德柱
Original assignee: Wuxi Zhongkang Fluid Technology Co ltd
Current assignee: Wuxi Zhongkang Fluid Technology Co ltd
Priority date: 2020-04-21
Filing date: 2020-04-21
Publication date: 2020-12-18
Anticipated expiration: 2030-04-21

Abstract

The utility model discloses a centrifugal pump device with adjustable blades, which comprises a hub; a plurality of blade groups are uniformly arranged on the surface of the hub in the circumferential direction; the blade group comprises a first blade and a second blade; the first blades and the second blades are distributed in a staggered manner; the second blade length is less than the first blade; the second blade is in rotational engagement with the hub surface; under the combined action of surrounding fluid, the pressure that the working face and the suction surface of short blade received will change in real time along with the change of incoming flow operating mode, and short blade will rotate around the rotation axis in order to keep self balance, adjusts the angle of repose of self in real time to the loss that flows that makes the fluid receive in the runner is in lower state all the time, improves the hydraulic efficiency of impeller with this, makes the centrifugal pump can all run with high efficiency under different operating modes, reaches the effect that improves pump equipment hydraulic efficiency.

Description

Centrifugal pump device with adjustable blades

Technical Field

The utility model relates to the technical field of fluid machinery, especially, relate to a centrifugal pump device with adjustable blade.

Background

The centrifugal pump is widely applied to daily life and industrial production, and the electric quantity consumed on the vane pump is extremely high in China every year, so that the energy conservation and the high efficiency of the centrifugal pump are particularly important. In actual production and life, centrifugal pumps often do not only operate under a single working condition, the operation under multiple working conditions is very common, and when the working conditions of incoming flows change, the efficiency of the traditional centrifugal pump often suffers great loss, so that the centrifugal pump operates in low efficiency for a long time. Therefore, how to enable one centrifugal pump to keep efficient operation under different working conditions becomes a difficult problem which needs to be solved urgently. The impeller is used as a core acting component of the centrifugal pump, and the hydraulic efficiency of the impeller directly influences the overall efficiency of the centrifugal pump, so that the centrifugal pump device with the adjustable blades is needed to be invented, and the hydraulic efficiency of the pump equipment can be improved.

Disclosure of Invention

The purpose of the invention is as follows: in order to overcome the defects existing in the prior art, the utility model provides a centrifugal pump device with adjustable blades, which can improve the hydraulic efficiency of pump equipment.

The technical scheme is as follows: to achieve the above object, the present invention provides a centrifugal pump device with adjustable blades, which comprises a hub; a plurality of blade groups are uniformly arranged on the surface of the hub in the circumferential direction; the blade group comprises a first blade and a second blade; the first blades and the second blades are distributed in a staggered manner; the second blade length is less than the first blade; the second blade is in rotational engagement with the hub surface.

Further, the rotational connection point of the second blade is located at the center in the length direction thereof.

Further, the surface of the hub is concavely provided with an adjusting groove; the second blade is correspondingly attached to the bottom of the adjusting groove; the second blade freely swings back and forth within the constraint range of the adjusting groove.

Further, the device also comprises a volute; the hub and the blade group are rotatably arranged inside the volute; a transfer cavity is connected and arranged outside the volute; a plurality of water delivery holes are formed in the side face of the volute; two ends of the water delivery hole in the depth direction are respectively communicated with the interior of the volute and the transfer cavity; the transfer cavity is communicated and butted with the outlet end of the corresponding water supply equipment.

Furthermore, a flow stopping column is embedded in the transfer cavity; the embedded end of the flow stopping column is correspondingly matched with the water delivery hole; the position of the flow stopping column is adjusted in a telescopic mode, and the opening and closing of each water delivery hole are correspondingly controlled.

Furthermore, a flow-stopping cavity is arranged inside the embedded end of the flow-stopping column; a water inlet is formed in the side wall of the flow stopping column; the water inlet is communicated with the flow rotating cavity and the external space of the flow stopping column.

Has the advantages that: the utility model relates to a centrifugal pump device with adjustable blades, which comprises a hub; a plurality of blade groups are uniformly arranged on the surface of the hub in the circumferential direction; the blade group comprises a first blade and a second blade; the first blades and the second blades are distributed in a staggered manner; the second blade length is less than the first blade; the second blade is in rotational engagement with the hub surface; under the combined action of surrounding fluid, the pressure that the working face and the suction surface of short blade received will change in real time along with the change of incoming flow operating mode, and short blade will rotate around the rotation axis in order to keep self balance, adjusts the angle of repose of self in real time to the loss that flows that makes the fluid receive in the runner is in lower state all the time, improves the hydraulic efficiency of impeller with this, makes the centrifugal pump can all run with high efficiency under different operating modes, reaches the effect that improves pump equipment hydraulic efficiency.

Drawings

FIG. 1 is a schematic view of a blade assembly configuration;

FIG. 2 is a schematic diagram showing the combination of a volute, a transfer chamber and a flow stopping column;

FIG. 3 is a schematic view of the operation principle of the stop flow column.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

A centrifugal pump assembly with adjustable vanes, as shown in figure 1, comprises a hub 1; a plurality of blade groups 2 are uniformly arranged on the surface of the hub 1 in an annular direction; the blade group 2 includes a first blade 21 and a second blade 22; the first blades 21 and the second blades 22 are distributed in a staggered manner; the second blade 22 is shorter in length than the first blade 21; the second blades 22 are in rotational engagement with the hub 1 surface.

The rotational connection point of the second blade 22 is located at the center position in the length direction thereof.

According to the working principle of the centrifugal pump, when the impeller is driven by the motor to rotate, the inlet and the outlet generate pressure difference, fluid is sucked into the inlet of the impeller under the action of the pressure difference and then enters the impeller flow channel under the action of centrifugal force. When parameters such as the flow of an upstream incoming flow are changed, fluid entering from an inlet presents different flow states, the fluid firstly works through the long blade structure of the first blade 21 to increase the energy of the fluid, then moves downstream to the short blade structure of the second blade 22, under the combined action of surrounding fluid, the pressure borne by the working surface and the suction surface of the short blade is changed in real time along with the change of the working condition of the incoming flow, the short blade rotates around the rotating shaft to keep the self balance, and the placing angle of the short blade is adjusted in real time, so that the flow loss borne by the fluid in a flow channel is always in a lower state, the hydraulic efficiency of the impeller is improved, the centrifugal pump can efficiently run under different working conditions, and the effect of improving the hydraulic efficiency of pump equipment is achieved.

The surface of the hub 1 is concavely provided with an adjusting groove 11; the second blade 22 is correspondingly attached to the bottom of the adjusting groove 11; the second vane 22 is free to swing back and forth within the constraint range of the adjustment slot 11, so that the constraint of the second vane 22 by the adjustment slot 11 can enhance the stability of the fluid adjustment.

The centrifugal pump apparatus further comprises a volute 3; the hub 1 and the blade group 2 are rotatably arranged inside the volute 3; as shown in fig. 2, a transfer chamber 5 is connected and arranged outside the volute 3; a plurality of water delivery holes 31 are formed in the side surface of the volute 3; two ends of the water delivery hole 31 in the depth direction are respectively communicated with the interior of the volute 3 and the transit cavity 5; the transfer cavity 5 is communicated and butted with the outlet end of the corresponding water supply equipment; through to the water current of transfer chamber 5 input, just can let rivers pass and form the protective water film on 3 inner walls of spiral case behind the water delivery hole 31 to reduce the friction between transport medium and the inner wall at pump equipment operation in-process, promote spiral case life.

A flow stopping column 51 is embedded in the transfer cavity 5; the embedded end of the flow stopping column 51 is correspondingly matched with the water delivery hole 31; the position of the flow stopping column 51 is telescopically adjusted, and the opening and closing of each water delivery hole 31 are correspondingly controlled; when the flow stopping columns 51 are inserted into the water delivery hole 31 to block it, the water delivery can be interrupted, and when the flow stopping columns 51 are pulled out of the water delivery hole 31, the water delivery can be resumed.

A flow-stopping cavity 52 is arranged inside the embedded end of the flow-stopping column 51; a water inlet 53 is formed in the side wall of the flow stopping column 51; the water inlet 53 communicates the diversion cavity 52 with the external space of the flow stopping column 51; as shown in fig. 3, the depth of the flow stopping column 51 embedded in the water delivery hole 31 is adjusted along the inserting direction, and the water delivery speed can be further flexibly controlled on the premise of maintaining the interruption and recovering the water delivery function by using the size of the opening of the water inlet 53 exposed outside the water delivery hole 31, wherein the dotted arrow in the figure is indicated by the water flow direction; and the structure of the water inlet 53 and the diversion cavity 52 is provided, the flow stopping column 51 is not required to be pulled out of the water delivery hole 31, and the phenomenon of unstable water delivery caused by huge pressure change at the inserting moment is avoided.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. A centrifugal pump apparatus having adjustable vanes, characterized by: comprising a hub (1); a plurality of blade groups (2) are uniformly arranged on the surface of the hub (1) in an annular direction; the blade group (2) comprises a first blade (21) and a second blade (22); the first blades (21) and the second blades (22) are distributed in a staggered manner; the second blade (22) is shorter in length than the first blade (21); the second blade (22) is in rotating fit with the surface of the hub (1).

2. The centrifugal pump apparatus with adjustable vanes of claim 1, wherein: the rotational connection point of the second blade (22) is located at the center in the length direction thereof.

3. The centrifugal pump apparatus with adjustable vanes of claim 1, wherein: the surface of the hub (1) is concavely provided with an adjusting groove (11); the second blade (22) is correspondingly attached to the bottom of the adjusting groove (11); the second blade (22) freely swings back and forth within the restriction range of the adjusting groove (11).

4. The centrifugal pump apparatus with adjustable vanes of claim 1, wherein: also comprises a volute (3); the hub (1) and the blade group (2) are rotationally arranged inside the volute (3); a transfer cavity (5) is connected and arranged outside the volute (3); a plurality of water conveying holes (31) are formed in the side surface of the volute (3); two ends of the water delivery hole (31) in the depth direction are respectively communicated with the interior of the volute (3) and the transfer cavity (5); the transfer cavity (5) is communicated and butted with the outlet end of the corresponding water supply equipment.

5. The centrifugal pump apparatus with adjustable vanes of claim 4, wherein: a flow stopping column (51) is embedded in the transfer cavity (5); the embedded end of the flow stopping column (51) is correspondingly matched with the water conveying hole (31); the position of the flow stopping column (51) is adjusted in a telescopic mode, and the opening and closing of each water delivery hole (31) are correspondingly controlled.

6. The centrifugal pump apparatus with adjustable vanes of claim 5, wherein: a flow-stopping cavity (52) is arranged inside the embedded end of the flow-stopping column (51); a water inlet (53) is formed in the side wall of the flow stopping column (51); the water inlet (53) communicates the diversion chamber (52) with the external space of the flow stopping column (51).