Efficient energy-saving circulating water pump

Abstract

The utility model belongs to the field of water pumps, and particularly relates to an efficient energy-saving circulating water pump which comprises a pump body, an impeller and a wheel shaft. One end of the pump body is provided with a water inlet communicated with the pump cavity, and the other end of the pump body is provided with a shaft hole used for sealing and rotationally connecting the wheel shaft; a water outlet communicated with the annular side wall is formed in the pump body; the diameter of the circular end wall I is smaller than that of the circular end wall II, and the diameter of the annular side wall is gradually increased from one side of the circular end wall I to one side of the circular end wall II; the impeller comprises a wheel body fixedly connected with the wheel shaft and a plurality of blades arranged on the outer side of the wheel body in an annular array mode, and the diameter of a circle formed by the end of the wheel body and the outer walls of the blades is gradually increased from the side of the circular end wall I to the side of the circular end wall II. According to the centrifugal circulating water pump provided by the utility model, through the structural improvement of the pump cavity and the impeller, higher flow or lift can be output under the same input power, so that high efficiency and energy conservation are realized.

Description

Technical Field

[0001] This utility model belongs to the field of water pumps, specifically relating to a high-efficiency and energy-saving circulating water pump. Background Technology

[0002] Currently, in the field of water pump energy saving, the main technical approaches focus on improving the efficiency of the drive system and refining hydraulic design. The former commonly employs variable frequency speed control technology, adjusting the motor speed to match actual load demands and avoiding energy waste caused by valve throttling. The latter focuses on optimizing key hydraulic components, such as applying more efficient impeller models that conform to fluid dynamics principles, improving parameters like blade profiles and outlet angles; carefully designing the pump casing hydraulically to reduce internal flow losses; and using precision casting and other methods to ensure the smoothness of the flow channel surface and reduce friction losses. These technologies play a crucial role in improving the overall operating efficiency of water pumps.

[0003] However, at the structural design level, especially in the critical area where the pump chamber and impeller meet, existing technologies still have significant energy-saving defects. Traditional centrifugal pumps typically use a pump chamber of uniform diameter or a simple conical shape paired with an impeller with (forward-curved / backward-curved) blades or a conical impeller with a large wrap angle. This design is prone to sudden expansion of the flow channel cross-section when water flows out of the impeller and enters the volute diffuser section, causing drastic changes in flow velocity and pressure pulsation, resulting in significant eddies, flow separation, and impact energy loss. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a circulating water pump that achieves high efficiency and energy saving by improving the structure of the pump chamber and impeller.

[0005] This utility model provides a high-efficiency and energy-saving circulating water pump, including a pump body, an impeller, and a shaft;

[0006] The pump body has a hollow interior with a pump chamber. One end of the pump body has a water inlet that connects to the pump chamber, and the other end has a shaft hole for sealing the rotating connecting wheel shaft.

[0007] The pump chamber includes a circular end wall I connected to the inlet, a circular end wall II connected to the shaft hole, and an annular side wall connecting the circular end wall I and the circular end wall II. The pump body is provided with an outlet connected to the annular side wall.

[0008] The diameter of circular end wall I is smaller than that of circular end wall II, and the diameter of the annular side wall gradually increases from one side of circular end wall I to the other side of circular end wall II.

[0009] The impeller is installed inside the pump chamber. The impeller includes a wheel body fixedly connected to the wheel shaft and several blades arranged in a ring array on the outside of the wheel body. The diameter of the circle formed by the end of the wheel body and the outer walls of the multiple blades gradually increases from the circular end wall I side to the circular end wall II side.

[0010] Furthermore, the size of the circle formed by the wheel end and the outer walls of multiple blades is a proportional scaling of the size of the middle end of the annular sidewall.

[0011] Furthermore, the annular sidewall includes an inlet annular sidewall and an outlet section arranged sequentially along one side of the circular endwall I to the other side of the circular endwall II;

[0012] The inlet section is connected to the inner diameter of the circular ring sidewall, and the outlet section is connected to the outer diameter of the circular ring sidewall.

[0013] The water outlet is located on the water outlet section.

[0014] Furthermore, a circular boss is provided at the end of the wheel body facing the water inlet section;

[0015] The end of the circular boss is located within the water outlet section.

[0016] Furthermore, the connection between the annular sidewall of the inlet section and the outlet section is a circular arc transition.

[0017] Furthermore, multiple blades have recessed cavities near the circular end wall II.

[0018] The end of the wheel body is provided with a reinforcing rib that connects the root positions of two adjacent blades, and the reinforcing rib divides the cavity into several parts.

[0019] Furthermore, multiple blades are parallel to the circular end wall II on the side closest to the circular end wall II;

[0020] One end of each of the multiple reinforcing ribs protrudes toward the circular end wall II.

[0021] Furthermore, the sidewall of the pump chamber and the bottom wall of the pump chamber with the shaft hole are connected by a circular arc transition.

[0022] Furthermore, the pump body includes a housing and end caps that are interconnected and fastened together;

[0023] The housing is hollow inside and open at one end. The end cap is connected to the open side of the housing and seals the opening. The end cap and the hollow housing together form a pump chamber.

[0024] The shaft hole is located on the end cap.

[0025] Furthermore, a sealing ring is provided on the connection side between the end cap and the housing.

[0026] The beneficial effects of this invention are that the circulating water pump provided by this invention adopts a gradually expanding structure for both the pump chamber and the impeller. This gradually expanding structure avoids the turbulence and impact losses caused by sudden expansion at the volute in traditional centrifugal pumps, resulting in smoother water flow. This significantly reduces internal hydraulic losses and improves energy conversion efficiency. Smoother flow also means lower flow resistance losses. Furthermore, because the pump chamber profile and impeller shape are matched, the gap between them is uniform. The consistent profiles and synchronous gradual expansion allow the water flow space to expand gradually, rather than abruptly. This avoids the problem of uneven or abruptly changing gaps when using a conical impeller with a pump chamber of uniform diameter. It suppresses secondary flow (fluid flowing in a different direction than the main flow) and circulation losses, reducing friction and energy dissipation losses, improving volumetric efficiency, and lowering hydraulic losses.

[0027] The centrifugal circulating water pump provided by this utility model can achieve higher flow rate or head under the same input power by improving the structure of the pump chamber and impeller, thereby achieving high efficiency and energy saving. Attached Figure Description

[0028] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0029] Appendix Figure 2 This is the front view of the present invention;

[0030] Appendix Figure 3 For the appendix Figure 2 Sectional view at point AA;

[0031] Appendix Figure 4 This is a schematic diagram of the structure of the wheel axle and end cover in this utility model.

[0032] In the figure, 1-pump body; 11-pump chamber; 111-circular end wall I; 112-circular end wall II; 113-annular side wall; 1131-inlet section; 1132-annular side wall; 1133-outlet section; 12-inlet; 13-shaft hole; 14-outlet; 15-shell; 16-end cover; 17-sealing ring; 2-impeller; 21-wheel body; 211-circular boss; 22-blade; 221-cavity; 23-reinforcing rib; 3-shaft. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0035] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection, an electrical connection, a physical connection, or a wireless communication connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal connection of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0038] like Figures 1-4 As shown, this utility model provides a high-efficiency and energy-saving circulating water pump, including a pump body 1, an impeller 2, and a shaft 3;

[0039] The pump body 1 has a hollow interior with a pump chamber 11. One end of the pump body 1 has a water inlet 12 that communicates with the pump chamber 11, and the other end has a shaft hole 13 for sealing the rotating connecting wheel shaft 3.

[0040] The pump chamber 11 includes a circular end wall I111 connected to the inlet 12, a circular end wall II112 connected to the shaft hole 13, and an annular side wall 113 connecting the circular end wall I111 and the circular end wall II112. The pump body 1 is provided with an outlet 14 connected to the annular side wall 113.

[0041] The diameter of circular end wall I111 is smaller than the diameter of circular end wall II112, and the diameter of annular side wall 113 gradually increases from one side of circular end wall I111 to the other side of circular end wall II112;

[0042] Impeller 2 is disposed in pump chamber 11. Impeller 2 includes wheel body 21 fixedly connected to wheel shaft 3 and several blades 22 arranged in a ring array on the outside of wheel body 21. The circle formed by the end of wheel body 21 and the outer wall of multiple blades 22 gradually increases in diameter along the circular end wall I 111 side to the circular end wall II 112 side.

[0043] The circulating water pump provided by this utility model adopts a gradually expanding structure for both the pump chamber 11 and the impeller 2. This gradually expanding structure avoids the turbulence and impact losses caused by sudden expansion at the volute in traditional centrifugal pumps, resulting in smoother water flow. This significantly reduces internal hydraulic losses and improves energy conversion efficiency. Smoother flow also means lower flow resistance losses. Furthermore, because the contours of the pump chamber 11 and the impeller 2 are matched, the gap between them is uniform. The consistent contours and synchronous gradual expansion allow the water flow space to expand gradually, rather than abruptly. This avoids the problem of uneven or abruptly changing gaps when using a conical impeller with a pump chamber of uniform diameter. It suppresses secondary flow (fluid flowing in a different direction than the main flow) and circulation losses, reducing friction and energy dissipation losses, improving volumetric efficiency, and lowering hydraulic losses.

[0044] The centrifugal circulating water pump provided by this utility model can achieve higher flow rate or head under the same input power by improving the structure of the pump chamber 11 and impeller 2, thereby achieving high efficiency and energy saving.

[0045] In one embodiment, the size of the circle formed by the end of the impeller 21 and the outer walls of the multiple blades 22 is a proportional scaling of the size of the middle end of the annular sidewall 113, meaning that the gap between the pump cavity 11 profile and the impeller 2 is uniform. This minimizes the velocity abrupt changes, pressure disturbances, and secondary flow generation caused by local misalignment between the impeller shape and the pump cavity profile in conventional designs, further reducing energy dissipation in the internal flow.

[0046] In one embodiment, the annular sidewall 113 includes an inlet section 1131, an annular sidewall 1132, and an outlet section 1133 arranged sequentially along one side of the circular endwall I 111 to one side of the circular endwall II 112, wherein the annular sidewall 1132 is parallel to the circular endwall I 111.

[0047] The water inlet section 1131 is connected to the inner diameter of the annular sidewall 1132, and the water outlet section 1133 is connected to the outer diameter of the annular sidewall 1132.

[0048] The outlet 14 is located on the outlet section 1133.

[0049] In this embodiment, the water inlet section 1131 is connected to the inner diameter of the annular sidewall 1132 to form a converging inlet, which forces the fluid to accelerate naturally into the water outlet section 1133 under the drive of the impeller 2. The water outlet section 1133 is larger in size, which can make the pump chamber 11 volume larger and the impeller 2 larger in size.

[0050] Preferably, the axis of the outlet 14 is perpendicular to the axis of the wheel axle 3.

[0051] In one embodiment, a circular boss 211 is provided at the end of the wheel body 21 facing the water inlet section 1131;

[0052] The end of the circular boss 211 is located inside the water outlet section 1133.

[0053] The circular boss 211 can pre-divide the incoming water evenly, forming a smooth transition flow channel, ensuring radial pressure balance in the pump chamber 11, and facilitating the entry of the diverted liquid into the wheel body 21 and blades 22, thereby improving energy transfer efficiency.

[0054] In one embodiment, the connection between the annular sidewall 1132 of the inlet section 1131 and the outlet section 1133 is a circular arc transition. The circular arc transition can ensure smooth fluid flow and reduce local small-scale turbulence.

[0055] In one embodiment, a cavity 221 is provided on the side of the plurality of blades 22 near the circular end wall II112;

[0056] The end of the wheel body 21 is provided with a reinforcing rib 23 that connects the root positions of two adjacent blades 22, and the reinforcing rib 23 divides the cavity 221 into several parts.

[0057] The recessed cavity 221 reduces the weight of the impeller 2, achieving weight reduction, while maintaining the volume of the pump chamber 11. The reinforcing rib 23 improves the structural strength of the impeller 2 and also forms secondary blades, thus slightly increasing efficiency.

[0058] In one embodiment, the plurality of blades 22 are parallel to the circular end wall II112 on the side near the circular end wall II112;

[0059] One end of each of the multiple reinforcing ribs 23 protrudes towards the circular end wall II112. This arrangement not only enhances the reinforcing effect of the reinforcing ribs 23, but also allows the reinforcing ribs 23 to protrude from the end of the blade 22, thereby improving the efficiency of the auxiliary blades.

[0060] In one embodiment, the sidewall of the pump chamber 11 has a rounded transition with the bottom wall of the pump chamber 11 on the side where the shaft hole 13 is provided. The rounded transition can ensure smooth fluid flow and reduce local small-scale turbulence.

[0061] In one embodiment, the pump body 1 includes a housing 15 and an end cap 16 that are interconnected and fastened together.

[0062] The housing 15 is hollow inside and open at one end. The end cap 16 is connected to the open side of the housing 15 and seals the opening. The end cap 16 and the hollow housing together form the pump chamber 11.

[0063] The shaft hole 13 is provided on the end cover 16.

[0064] This design facilitates the installation of impeller 2 and the maintenance of the circulating water pump.

[0065] In one embodiment, a sealing ring 17 is provided on the connection side between the end cap 16 and the housing 15, thereby improving the sealing effect of the standard pump chamber 11 and preventing leakage. In a preferred embodiment, the end face of the end cap 16 serves as a circular end wall II 112. In this case, the annular sidewalls 113 are all provided on the housing 15. The arc transition structure between the annular sidewalls 113 and the circular end wall II 112 is also provided on the housing 15, which can increase the contact area between the end cap 16 and the housing 15 and improve the sealing effect.

[0066] The above description is merely an embodiment and does not constitute any limitation on this utility model. Any person skilled in the art can make many possible variations, modifications, or alterations to the technical solution of this utility model without departing from its scope. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this utility model, without departing from its scope, should fall within the protection scope of this utility model.

Claims

1. A high-efficiency and energy-saving circulating water pump, characterized in that it includes: Pump body (1), impeller (2) and shaft (3); The pump body (1) has a hollow interior with a pump chamber (11). One end of the pump body (1) has a water inlet (12) that connects to the pump chamber (11), and the other end has a shaft hole (13) for sealing the rotating connecting wheel shaft (3). The pump chamber (11) includes a circular end wall I (111) connected to the inlet (12) side, a circular end wall II (112) connected to the shaft hole (13) side, and an annular side wall (113) connecting the circular end wall I (111) and the circular end wall II (112). The pump body (1) is provided with an outlet (14) connected to the annular side wall (113). The diameter of circular end wall I (111) is smaller than that of circular end wall II (112), and the diameter of the annular side wall (113) gradually increases from one side of circular end wall I (111) to the other side of circular end wall II (112); The impeller (2) is located inside the pump chamber (11). The impeller (2) includes a wheel body (21) fixedly connected to the wheel shaft (3) and several blades (22) arranged in a ring array on the outside of the wheel body (21). The circle formed by the end of the wheel body (21) and the outer wall of the multiple blades (22) gradually increases in diameter along the circular end wall I (111) to the circular end wall II (112).

2. The high-efficiency energy-saving circulating water pump as described in claim 1, characterized in that, The size of the circle formed by the end of the wheel body (21) and the outer walls of the multiple blades (22) is a proportional scaling of the size of the middle end of the annular sidewall (113).

3. The high-efficiency energy-saving circulating water pump as described in claim 1, characterized in that, The annular sidewall (113) includes an inlet section (1131), an annular sidewall (1132), and an outlet section (1133) arranged sequentially along one side of the circular endwall I (111) to one side of the circular endwall II (112). The inlet section (1131) is connected to the inner diameter of the annular sidewall (1132), and the outlet section (1133) is connected to the outer diameter of the annular sidewall (1132). The outlet (14) is located on the outlet section (1133).

4. The high-efficiency energy-saving circulating water pump as described in claim 3, characterized in that, A circular boss (211) is provided at the end of the wheel body (21) facing the water inlet section (1131). The end of the circular boss (211) is located inside the water outlet section (1133).

5. The high-efficiency energy-saving circulating water pump as described in claim 3, characterized in that, The connection between the annular sidewall (1132) of the inlet section (1131) and the outlet section (1133) is a circular arc transition.

6. The high-efficiency energy-saving circulating water pump as described in any one of claims 1-5, characterized in that, Multiple blades (22) have a cavity (221) on the side near the circular end wall II (112); The wheel body (21) has a reinforcing rib (23) at the end that connects the root of two adjacent blades (22). The reinforcing rib (23) divides the cavity (221) into several parts.

7. The high-efficiency energy-saving circulating water pump as described in claim 6, characterized in that, Multiple blades (22) are parallel to the circular end wall II (112) on the side near the circular end wall II (112); One end of each of the multiple reinforcing ribs (23) protrudes toward the circular end wall II (112).

8. The high-efficiency energy-saving circulating water pump as described in any one of claims 1-5, characterized in that, The side wall of the pump chamber (11) and the bottom wall of the pump chamber (11) with the shaft hole (13) are connected by a circular arc transition.

9. The high-efficiency energy-saving circulating water pump as described in any one of claims 1-5, characterized in that, The pump body (1) includes a housing (15) and an end cap (16) that are connected and fastened together. The housing (15) is hollow inside and open at one end. The end cap (16) is connected to the open side of the housing (15) and seals the opening. The end cap (16) and the hollow housing form a pump chamber (11). The shaft hole (13) is provided on the end cap (16).

10. The high-efficiency energy-saving circulating water pump as described in claim 9, characterized in that, A sealing ring (17) is provided on the connection side between the end cap (16) and the housing (15).

Images