Volute structure for reducing water conservancy pulsation
By introducing flow guide channels and ribs into the volute structure, the fluid is evenly divided into four parts. By utilizing the viscosity and adhesion of the liquid, the problem of large hydraulic pulsation in the volute structure is solved, noise and vibration are reduced, and the operational stability of the equipment is improved.
Patent Information
- Application Number
- CN202520538236.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2035-03-26
AI Technical Summary
The existing volute structure design results in significant hydraulic pulsation, causing noise and vibration in the pump and affecting the stability of equipment operation.
By introducing flow channels and flow ribs into the volute structure, the fluid is evenly divided into four parts. By utilizing the viscosity and adhesion of the liquid, the pressure pulsation of the fluid is gradually reduced in the flow channels, and finally it is converted into a balanced non-pulsating fluid.
It effectively reduces hydraulic pulsation, noise and vibration, and improves the operational stability of the equipment.
Smart Images
Figure CN223662172U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of volute structures, and in particular to a volute structure for reducing hydraulic pulsation. Background Technology
[0002] The volute of a water pump is an important component. Its main functions are: first, to collect the fluid ejected from the centrifugal impeller; second, to guide the liquid flow in a designated direction; third, to improve energy conversion, as the flow velocity gradually decreases and the pressure gradually increases as the volute's flow channel area gradually increases; and fourth, to buffer hydraulic pulsations. The liquid ejected by the impeller typically exhibits significant hydraulic pulsations, making the design of the volute's flow channel crucial. Otherwise, these large hydraulic pulsations will generate significant pump noise, and when installed in vehicles or equipment, they can cause severe resonance, resulting in even more serious vibration and noise damage. Utility Model Content
[0003] To solve the above-mentioned technical problems, this utility model provides a volute structure that reduces hydraulic pulsation. Due to the viscosity and adhesion of the liquid, the fluid with large hydraulic pulsation enters the guide channel and flows along the guide structure, gradually reducing the pressure pulsation and eventually converting into a balanced, pulsation-free fluid, which then flows out from the outlet of the first flow channel.
[0004] This utility model discloses a volute structure for reducing hydraulic pulsation, comprising a lower volute and an upper volute. The upper volute is mounted on the top of the lower volute and has an inlet at its top. An impeller is disposed inside the lower volute. It also includes a first flow channel, a second flow channel, and a flow guiding structure. The first flow channel is connected to the outer wall of the upper volute, and the second flow channel is connected to the lower volute, with the first and second flow channels interconnected. The flow guiding structure is disposed on the inner walls of the first and second flow channels, respectively. The flow guiding structure adds four flow guiding grooves to the first and second flow channels, which are parallel to the spiral lines of the first and second flow channels, thus uniformly distributing the fluid within the first and second flow channels. It is divided into four parts; the water enters through the inlet at the top of the upper volute, and the impeller in the lower volute rotates to transport the water to the first and second flow channels and discharges from the first flow channel. By adding a flow guiding structure, the fluid in the first and second flow channels is evenly divided into four parts. After the impeller throws the fluid out, the fluid first enters the first two flow guiding channels and flows evenly along the flow guiding channels. Then it enters the last two flow guiding channels. Due to the viscosity and adhesion of the liquid, the fluid with large hydraulic pulsation enters the flow guiding channel and flows along the flow guiding structure, gradually reducing the pressure pulsation. Finally, it is converted into a balanced, pulsation-free fluid and flows out from the outlet of the first flow channel, effectively reducing the hydraulic pulsation.
[0005] Preferably, the flow guiding structure includes three sets of first flow guiding ribs and three sets of second flow guiding ribs. The three sets of first flow guiding ribs are respectively disposed on the outer side wall of the second flow channel, and the three sets of second flow guiding ribs are respectively disposed on the inner side wall of the first flow channel. The three sets of first flow guiding ribs and the three sets of second flow guiding ribs are parallel to the spiral lines of the first and second flow channels. By respectively disposing of three sets of first flow guiding ribs and three sets of second flow guiding ribs, the effect of fluid guidance and reduction of hydraulic pulsation is improved.
[0006] Preferably, the three sets of first guide ribs and the three sets of second guide ribs are arranged vertically opposite each other, and the three sets of first guide ribs and the three sets of second guide ribs are flush at the tail end, with an initial angle difference of 60° between each pair; this improves the fluid guidance and reduces hydraulic pulsation.
[0007] Preferably, the thickness of the first and second guide ribs is 0.6 mm; ensuring strength while reducing weight.
[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: Water enters through the inlet at the top of the upper volute, and the impeller in the lower volute rotates to transport the water to the first and second flow channels and discharges it from the first flow channel. By adding a flow guiding structure, the fluid in the first and second flow channels is evenly divided into four parts. After the impeller throws the fluid out, the fluid first enters the first two flow guiding channels and flows evenly along the flow guiding channels. Then it enters the last two flow guiding channels. Due to the viscosity and adhesion of the liquid, the fluid with large hydraulic pulsation enters the flow guiding channel and flows along the flow guiding structure, gradually reducing the pressure pulsation. Finally, it is converted into a balanced, pulsation-free fluid and flows out from the outlet of the first flow channel, effectively reducing hydraulic pulsation. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the isometric structure of this utility model;
[0010] Figure 2 This is a schematic diagram of the connection between the lower and upper volutes, etc.
[0011] Figure 3 This is a partial isometric structural diagram showing the connection between the second flow channel and the first guide rib, etc.
[0012] Figure 4 This is a partial isometric structural diagram showing the connection between the upper volute and the first flow channel, etc.
[0013] Figure 5 This is an isometric partial structural diagram of the lower volute and the second flow channel.
[0014] The following diagram is labeled as follows: 1. Lower volute; 2. Upper volute; 3. First flow channel; 4. Second flow channel; 5. First guide rib; 6. Second guide rib. Detailed Implementation
[0015] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.
[0016] Example 1
[0017] like Figures 1 to 5 As shown, this utility model discloses a volute structure for reducing hydraulic pulsation, comprising a lower volute 1 and an upper volute 2. The upper volute 2 is installed at the top of the lower volute 1 and has an inlet at its top. An impeller is disposed inside the lower volute 1. It also includes a first flow channel 3, a second flow channel 4, and a flow guiding structure. The first flow channel 3 is connected to the outer wall of the upper volute 2, and the second flow channel 4 is connected to the lower volute 1. The first flow channel 3 and the second flow channel 4 are connected. The flow guiding structure is disposed on the inner wall of the first flow channel 3 and the inner wall of the second flow channel 4, respectively. The flow guiding structure distributes four flow guiding grooves within the first flow channel 3 and the second flow channel 4. These flow guiding grooves are parallel to the spiral lines of the first flow channel 3 and the second flow channel 4, uniformly dividing the fluid within the first flow channel 3 and the second flow channel 4 into four parts.
[0018] like Figure 2 As shown, the flow guiding structure includes three sets of first flow guiding ribs 5 and three sets of second flow guiding ribs 6. The three sets of first flow guiding ribs 5 are respectively arranged on the outer side wall of the second flow channel 4, and the three sets of second flow guiding ribs 6 are respectively arranged on the inner side wall of the first flow channel 3. The three sets of first flow guiding ribs 5 and the three sets of second flow guiding ribs 6 are parallel to the spiral lines of the first flow channel 3 and the second flow channel 4.
[0019] In this embodiment, water enters through the inlet at the top of the upper volute 2. The impeller inside the lower volute 1 rotates and transports the water to the first flow channel 3 and the second flow channel 4, and discharges it from the first flow channel 3. By adding a flow guiding structure, the fluid in the first flow channel 3 and the second flow channel 4 is evenly divided into four parts. After the impeller throws the fluid out, the fluid first enters the first two flow guiding channels and flows evenly along the flow guiding channels. Then it enters the last two flow guiding channels. Due to the viscosity and adhesion of the liquid, the fluid with large hydraulic pulsation enters the flow guiding channel and flows along the flow guiding structure, gradually reducing the pressure pulsation. Finally, it is converted into a balanced, pulsation-free fluid and flows out from the outlet of the first flow channel 3, effectively reducing the hydraulic pulsation.
[0020] Example 2
[0021] Based on Example 1, such as Figure 2 As shown, in a spiral casing structure for reducing hydraulic pulsation according to this utility model, the three sets of first guide ribs 5 and the three sets of second guide ribs 6 are respectively arranged vertically opposite each other, and the three sets of first guide ribs 5 and the three sets of second guide ribs 6 are flush at the tail end, with an initial angle difference of 60° between each pair.
[0022] like Figure 4 As shown, the thickness of the first guide rib 5 and the second guide rib 6 is 0.6 mm;
[0023] In this embodiment, by setting three sets of first guide ribs 5 and three sets of second guide ribs 6 respectively, the effect of fluid guidance and reduction of hydraulic pulsation is improved.
[0024] This utility model discloses a volute structure for reducing hydraulic pulsation. During operation, water enters through the inlet at the top of the upper volute 2. The impeller inside the lower volute 1 rotates and transports the water to the first flow channel 3 and the second flow channel 4, and then discharges it from the first flow channel 3. By adding a flow guiding structure, the fluid in the first flow channel 3 and the second flow channel 4 is evenly divided into four parts. After the impeller throws the fluid out, the fluid first enters the first two flow guiding channels and flows evenly along the flow guiding channels, and then enters the last two flow guiding channels.
[0025] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A volute structure for reducing hydraulic pulsation, comprising a lower volute (1) and an upper volute (2), wherein the upper volute (2) is mounted on the top of the lower volute (1), an inlet is provided at the top of the upper volute (2), and an impeller is provided inside the lower volute (1); characterized in that, It also includes a first flow channel (3), a second flow channel (4) and a flow guiding structure. The first flow channel (3) is connected to the outer wall of the upper volute (2), and the second flow channel (4) is connected to the lower volute (1). The first flow channel (3) and the second flow channel (4) are connected. The flow guiding structure is respectively set on the inner wall of the first flow channel (3) and the inner wall of the second flow channel (4). The flow guiding structure adds four flow guiding grooves in the first flow channel (3) and the second flow channel (4). The flow guiding grooves are parallel to the spiral line of the first flow channel (3) and the second flow channel (4) and divide the fluid in the first flow channel (3) and the second flow channel (4) into four parts evenly.
2. The volute structure for reducing hydraulic pulsation as described in claim 1, characterized in that, The flow guiding structure includes three sets of first flow guiding ribs (5) and three sets of second flow guiding ribs (6). The three sets of first flow guiding ribs (5) are respectively set on the outer side wall of the second flow channel (4), and the three sets of second flow guiding ribs (6) are respectively set on the inner side wall of the first flow channel (3). The three sets of first flow guiding ribs (5) and the three sets of second flow guiding ribs (6) are parallel to the spiral lines of the first flow channel (3) and the second flow channel (4).
3. The volute structure for reducing hydraulic pulsation as described in claim 2, characterized in that, The three sets of first guide ribs (5) and the three sets of second guide ribs (6) are respectively arranged vertically opposite each other, and the three sets of first guide ribs (5) and the three sets of second guide ribs (6) are flush at the tail end, with an initial angle difference of 60° between each pair.
4. The volute structure for reducing hydraulic pulsation as described in claim 2, characterized in that, The thickness of the first guide rib (5) and the second guide rib (6) is 0.6 mm.