A dynamic variable diameter impeller for a constant pressure pump

Abstract

The present invention discloses a dynamic variable diameter impeller for a constant pressure pump, comprising a wheel disc, a hub arranged at the center of the wheel disc, and a plurality of blades connected to one side of the wheel disc and the outer peripheral surface of the hub, a variable diameter device is arranged on the other side of the wheel disc, and the variable diameter device comprises an upper end cover assembly and a lower end cover assembly, the upper end cover assembly comprises a plurality of upper fan-shaped plates evenly distributed in a circle, and a protrusion is arranged on the bottom surface of the upper fan-shaped plates; the lower end cover assembly comprises a plurality of lower fan-shaped plates evenly distributed in a circle, and the protrusion is located between two adjacent lower fan-shaped plates; the upper fan-shaped plates and the lower fan-shaped plates can move radially outward and inward relative to the wheel disc respectively; a spring is arranged between the hub and the upper fan-shaped plates, and between the hub and the lower fan-shaped plates, and the spring always has an outward elastic force on the upper fan-shaped plates and the lower fan-shaped plates. The present invention achieves the purpose of changing the water flow rate and maintaining constant pressure by changing the diameter of the water pump impeller.

Description

Technical Field

[0001] The invention relates to the technical field of constant pressure pumps, in particular to a dynamic variable diameter impeller for a constant pressure pump. Background Art

[0002] The water flow rate and head of the water pump are related to the pump speed and impeller diameter. At present, the way to adjust the flow rate of the water pump at constant pressure is to adjust the speed of the water pump, that is, variable frequency speed regulation of water supply. This method requires a matching inverter to control the running speed of the water pump, which is relatively expensive. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a dynamic variable diameter impeller for a constant pressure pump, which automatically changes the diameter of the water pump impeller according to the size of the water pressure to achieve the purpose of changing the water flow rate and maintaining a constant pressure.

[0004] In order to solve the above technical problems, the technical solution of a dynamic variable diameter impeller for a constant pressure pump of the present invention is:

[0005] A dynamic variable diameter impeller for a constant pressure pump comprises a wheel disc, a hub arranged at the center of the wheel disc, and a plurality of blades connected to one side surface of the wheel disc and the outer peripheral surface of the hub, a variable diameter device is provided on the other side surface of the wheel disc, and the variable diameter device comprises an upper end cover assembly and a lower end cover assembly, the upper end cover assembly comprises a plurality of upper fan-shaped plates evenly distributed around the circumference, and a protrusion is provided on the bottom surface of the upper fan-shaped plates; the lower end cover assembly comprises a plurality of lower fan-shaped plates evenly distributed around the circumference, and the protrusion is located between two adjacent lower fan-shaped plates; the plurality of upper fan-shaped plates form a full circle, and the plurality of lower fan-shaped plates and the plurality of protrusions form a full circle, and the outer diameters of the two full circles are consistent with the outer diameter of the wheel disc; the upper fan-shaped plates and the lower fan-shaped plates can move radially outward and inward relative to the wheel disc respectively; springs are provided between the hub and the upper fan-shaped plates, and between the hub and the lower fan-shaped plates, and the springs always have an outward elastic force on the upper fan-shaped plates and the lower fan-shaped plates.

[0006] A guide mechanism is provided between the upper fan-shaped plate, the lower fan-shaped plate and the wheel disc, and the guide mechanism includes a protrusion arranged on the upper fan-shaped plate, a guide groove on the bottom surface of the lower fan-shaped plate, and a guide strip arranged on the outer surface of the wheel disc and matching the guide groove. The cross-section of the guide strip is an inverted trapezoidal structure, and a plurality of ball bearings are provided on both side surfaces of the guide strip. The two side walls of the guide groove match the ball bearings. A limiting structure is also provided between the guide groove and the guide strip.

[0007] The limiting structure includes a limiting groove arranged on the top surface of the guide strip, and a limiting column arranged in the guide groove and matched in the limiting groove.

[0008] A positioning plate is extended outwardly on the left side of the upper sector plate, and a positioning groove is provided on the top surface of the right side. The positioning plates of two adjacent upper sector plates are matched with the positioning grooves.

[0009] The technical effects that can be achieved by the present invention are:

[0010] Compared with the prior art, the dynamic variable diameter impeller for the constant pressure pump of the present invention is applied to the water pump. When the water pump is working, when the user's water consumption decreases, the water outlet pressure of the water pump outlet pipe will increase, and the upper fan plate and the lower fan plate are compressed toward the hub direction of the impeller center under the action of the increased pressure, and the impeller disk diameter becomes smaller until a plurality of upper fan plates and a plurality of lower fan plates become a full circle, and the water outlet flow rate decreases accordingly; when the water consumption of the water pump outlet pipe increases, the water outlet pressure of the water pump outlet pipe will decrease, and the upper fan plate and the lower fan plate expand in the opposite direction of the impeller center hub under the action of the spring force, the impeller disk diameter becomes larger, and the water outlet flow rate increases accordingly, thereby achieving automatic adjustment of the water outlet flow rate according to demand while keeping the water pump outlet pressure constant. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0012] Figure 1 It is a stereoscopic view from one perspective of the dynamic variable diameter impeller for the constant pressure pump of the present invention;

[0013] Figure 2 It is a stereoscopic diagram from another perspective of the dynamic variable diameter impeller for the constant pressure pump of the present invention;

[0014] Figure 3 It is a three-dimensional exploded view from one perspective of a dynamically variable diameter impeller for a constant pressure pump of the present invention;

[0015] Figure 4 It is a three-dimensional exploded view from another perspective of the dynamically variable diameter impeller for the constant pressure pump of the present invention. DETAILED DESCRIPTION

[0016] like Figures 1 to 4As shown, the present invention provides a dynamic variable diameter impeller for a constant pressure pump, comprising a wheel disc 1, a hub 2 arranged at the center of the wheel disc 1, and a plurality of blades 3 connected to one side surface of the wheel disc 1 and the outer peripheral surface of the hub 2, the other side surface of the wheel disc 1 is provided with a variable diameter device, the variable diameter device 17 comprises an upper end cover assembly 4 and a lower end cover assembly 5, the upper end cover assembly 4 comprises a plurality of upper sector plates 6 uniformly distributed around the circumference, and the bottom surface of the upper sector plates 6 is provided with a protrusion 7; the lower end cover assembly 5 ... A plurality of lower fan-shaped plates 8, and a protrusion 7 are located between two adjacent lower fan-shaped plates 8; the plurality of upper fan-shaped plates 6 form a whole circle, and the plurality of lower fan-shaped plates 8 and the plurality of protrusions 7 form a whole circle, and the outer diameters of the two whole circles are consistent with the outer diameter of the wheel disc 1; the upper fan-shaped plates 6 and the lower fan-shaped plates 8 can move radially outward and inward relative to the wheel disc 1 respectively; springs 9 are provided between the wheel hub 2 and the upper fan-shaped plates 6, and between the wheel hub 2 and the lower fan-shaped plates 8, and the springs 9 always have an outward elastic force on the upper fan-shaped plates 6 and the lower fan-shaped plates 8.

[0017] A guide mechanism is provided between the upper fan-shaped plate 6, the lower fan-shaped plate 8 and the wheel disc 1, and the guide mechanism includes a protrusion 7 provided on the upper fan-shaped plate 6, a guide groove 10 on the bottom surface of the lower fan-shaped plate 8, and a guide strip 11 provided on the outer surface of the wheel disc 1 and matching the guide groove 10. The cross-section of the guide strip 11 is an inverted trapezoidal structure, and a plurality of balls 12 are provided on both side surfaces of the guide strip 11. The two side walls of the guide groove 10 match the balls 12. A limiting structure is also provided between the guide groove 10 and the guide strip 11.

[0018] The limiting structure includes a limiting groove 13 arranged on the top surface of the guide strip 11 , and a limiting column 14 arranged in the guide groove 10 and matched in the limiting groove 13 .

[0019] A positioning plate 15 is extended outwardly from the left side of the upper sector plate 6 , and a positioning groove 16 is provided on the top surface of the right side. The positioning plates 15 of two adjacent upper sector plates 6 correspond to and match with the positioning grooves 16 .

[0020] We believe that the purpose of changing the water flow rate and maintaining constant pressure can be achieved by automatically changing the diameter of the water pump impeller. During the experiment, we concluded that: changing the diameter of the impeller 1 and the diameter of the blade 3 at the same time will cause changes in the flow rate and head; changing only the diameter of the blade 3 within a certain range without changing the diameter of the impeller 1 will cause a change in the head, and the flow rate will remain unchanged; changing only the diameter of the impeller 1 within a certain range without changing the diameter of the blade 3 will cause a change in the flow rate, and the head will remain unchanged. Therefore, the dynamic variable diameter impeller for the constant pressure pump of the present invention achieves the purpose of variable outer diameter of the impeller by setting a variable diameter device 17 on the outer side of the impeller 1, specifically: under normal conditions, the upper end cover assembly 4 and the lower end cover assembly 5 are subjected to the outward elastic force of the spring 9, and the outer diameters of the upper fan plate 6 and the lower fan plate 8 are in the maximum state, thereby making the overall outer diameter of the impeller 1 larger. When the upper fan plate 6 and the lower fan plate 8 are subjected to inward pressure, and the pressure is greater than the elastic force of the spring 9, the upper fan plate 6 and the lower fan plate 8 move inward, and the outer diameter of the impeller 1 gradually decreases, until a number of upper fan plates 6 become a full circle, and a number of lower fan plates 8 become a full circle, then the outer diameter of the impeller 1 is based on the actual size of the impeller 1; when the upper fan plate 6 and the lower fan plate 8 are subjected to inward pressure, and the pressure is greater than the elastic force of the spring 9, the upper fan plate 6 and the lower fan plate 8 move inward, and the outer diameter of the impeller 1 gradually decreases, until a number of upper fan plates 6 become a full circle, and a number of lower fan plates 8 become a full circle, then the outer diameter of the impeller 1 is based on the actual size of the impeller 1; During the extension and retraction process of the plate 8, the guiding mechanism makes the upper fan-shaped plate 6 and the lower fan-shaped plate 8 always fit tightly with the wheel disc 1, thereby ensuring that the wheel disc 1 is an integral structure. Moreover, in order to ensure the smooth movement of the upper fan-shaped plate 6 and the lower fan-shaped plate 8, balls 12 are specially arranged on the two side surfaces of the guide strip 11. At the same time, in order to prevent the upper fan-shaped plate 6 and the lower fan-shaped plate 8 from colliding with the inner wall of the pump body due to excessive displacement when moving outward, a limiting structure is specially designed. Specifically, when the outer diameter of the upper fan-shaped plate 6 and the lower fan-shaped plate 8 reaches the maximum, the limiting column 14 is at the outer end of the limiting groove 13. When several upper fan-shaped plates 6 and several lower fan-shaped plates 8 form a whole circle at the same time, the limiting column 14 is in the limiting groove 13 and will never leave the limiting groove 13.

[0021] The upper sector plate 6 has a positioning plate 15 and a positioning groove 16, which makes the upper sector plate 6 and the lower sector plate 8 more stable when moving.

[0022] The above is a detailed introduction to a dynamic variable diameter impeller for a constant pressure pump provided in an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A dynamic variable diameter impeller for a constant pressure pump, comprising a wheel disc, a hub arranged at the center of the wheel disc, and a plurality of blades connected to one side surface of the wheel disc and the outer peripheral surface of the hub, Features: A variable diameter device is provided on the other side of the wheel disc, and the variable diameter device includes an upper end cover assembly and a lower end cover assembly, the upper end cover assembly includes a plurality of upper fan-shaped plates evenly distributed around the circumference, and a protrusion is provided on the bottom surface of the upper fan-shaped plates; the lower end cover assembly includes a plurality of lower fan-shaped plates evenly distributed around the circumference, and the protrusion is located between two adjacent lower fan-shaped plates; the plurality of upper fan-shaped plates form a full circle, and the plurality of lower fan-shaped plates and the plurality of protrusions form a full circle, and the outer diameters of the two full circles are consistent with the outer diameter of the wheel disc; the upper fan-shaped plates and the lower fan-shaped plates can move radially outward and inward relative to the wheel disc, respectively; springs are provided between the hub and the upper fan-shaped plates, and between the hub and the lower fan-shaped plates, and the springs always have an outward elastic force on the upper fan-shaped plates and the lower fan-shaped plates.

2. A dynamically variable diameter impeller for a constant pressure pump according to claim 1, Features: A guide mechanism is provided between the upper fan-shaped plate, the lower fan-shaped plate and the wheel disc, and the guide mechanism includes a protrusion arranged on the upper fan-shaped plate, a guide groove on the bottom surface of the lower fan-shaped plate, and a guide strip arranged on the outer surface of the wheel disc and matching the guide groove. The cross-section of the guide strip is an inverted trapezoidal structure, and a plurality of ball bearings are provided on both side surfaces of the guide strip. The two side walls of the guide groove match the ball bearings. A limiting structure is also provided between the guide groove and the guide strip.

3. A dynamically variable diameter impeller for a constant pressure pump according to claim 2, Features: The limiting structure includes a limiting groove arranged on the top surface of the guide strip, and a limiting column arranged in the guide groove and matched in the limiting groove.

4. A dynamically variable diameter impeller for a constant pressure pump according to claim 1, Features: A positioning plate is extended outwardly on the left side of the upper sector plate, and a positioning groove is provided on the top surface of the right side. The positioning plates of two adjacent upper sector plates are matched with the positioning grooves.

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