A new type of vane pump injection damping and noise reduction device

Abstract

The utility model belongs to the technical field of fluid machinery, especially, relate to a new -type vane pump gas injection vibration reduction and noise reduction device, including flange plate, medium pipe and gas injection part, flange plate intercommunication gas injection part, and the even multiple medium pipes that can be detached are arranged in the circumference of flange plate one end. Still include pump body, and the flange of pump body one end is fixed and is equipped with the flange plate, and the medium pipe is located in the pump body. Gas injection part injects gas to the annular cavity inside flange plate, and gas is discharged into the pump body from the gas outlet hole on the medium pipe, and the gas injected into the pump body will form bubbles between the liquid conveyed in the pump, and the gas can absorb and relieve part vibration energy due to its compressibility, thereby reducing the turbulence intensity, reducing the vibration and noise caused by fluid flow.

Description

Technical Field

[0001] This utility model belongs to the field of fluid machinery technology, and in particular relates to a novel blade pump air injection vibration reduction and noise reduction device. Background Technology

[0002] A vane pump uses a motor to drive an impeller, drawing liquid in through the pump inlet. The centrifugal force of the impeller accelerates the liquid, ultimately discharging it at a higher pressure from the pump outlet. This working principle makes vane pumps widely used in water supply, irrigation, and industrial liquid transportation. However, vibration and noise are common problems in vane pump operation. These problems are usually caused by a variety of factors, such as impeller imbalance, hydrodynamic instability, cavitation within the pump, and wear of mechanical components. Continuous vibration not only accelerates the wear of internal mechanical components but can also cause bearing damage and seal failure, thus shortening the pump's service life. Furthermore, excessive noise levels can disturb the surrounding environment, affecting operator comfort and work efficiency. Vibration and noise can also lead to decreased pump efficiency, increased energy consumption, and prevent the pump from operating under optimal conditions. Therefore, to ensure the long-term stable operation and high efficiency of vane pumps, effective measures need to be taken to control and reduce vibration and noise problems.

[0003] To reduce vibration and noise in vane pumps, current methods include optimizing impeller structure and adding silencers. Optimizing the impeller structure can reduce turbulence and flow instability within the pump, thus lowering vibration and noise; however, this method typically requires significant design time and has very high manufacturing costs. Adding silencers effectively reduces pump noise propagation, but it can occupy considerable space and has limited effectiveness against certain types of noise. Therefore, a more effective method is needed to optimize pump noise and vibration. Utility Model Content

[0004] The purpose of this invention is to provide a novel blade pump air injection vibration reduction and noise reduction device to reduce pump noise and vibration.

[0005] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0006] A novel air injection vibration reduction and noise reduction device for a vane pump includes a flange, a medium pipe, and an air injection component; the flange is connected to the air injection component, and a plurality of medium pipes are uniformly and detachably arranged circumferentially on one end of the flange.

[0007] Furthermore, the flange has an annular cavity inside, and an air inlet is provided radially on the outer side of the flange. The air inlet is located on the inner side of the flange and connects to the annular cavity, while the air inlet is located on the outer side of the flange and connects to the air injection component.

[0008] Furthermore, one end of the flange is provided with a plurality of threaded holes evenly distributed around its circumference, the threaded holes being connected to the annular cavity, and one end of the medium pipe having a threaded portion on its outer side, the threaded hole being threadedly connected to the threaded portion.

[0009] Furthermore, multiple sets of air outlet holes are uniformly arranged on the outer circumference of the medium tube, and the air outlet hole sets include multiple air outlet holes uniformly arranged along the length direction of the medium tube.

[0010] Furthermore, the gas injection component includes a gas inlet pipe, one end of which is connected to the flange, and the other end of which is connected to a gas injection pump. The gas inlet pipe is also equipped with a one-way valve, a gas flow meter, and a control valve. The gas flow meter, control valve, and gas injection pump are electrically connected to a control unit.

[0011] Furthermore, it also includes a pump body, one end of which is fixedly provided with a flange, which is threadedly connected to the flange plate, and the medium pipe is located inside the pump body.

[0012] This invention has the following beneficial effects: It is equipped with an injection component and a medium pipe, and the medium pipe is provided with an outlet hole. By adjusting the flow rate of the injected gas through the injection component and by adjusting the orifice diameter of the outlet hole, the flow rate and bubble size of the gas injected into the pump body can be controlled. Appropriate gas flow rate and bubble size can absorb and mitigate some vibration energy, thereby reducing the transmission of vibration. It can also buffer the impact force of the fluid flowing in the pump, absorb some turbulence energy, and play a damping role, thereby reducing the intensity of turbulence and reducing vibration and noise caused by fluid flow. The gas at the wall position reduces the direct impact between the liquid and the pump wall, which can also reduce the noise level to a certain extent. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 A three-dimensional view of the flange and medium pipe;

[0015] Figure 3 This is a graph showing the relationship between pump inlet and outlet noise and air injection volume;

[0016] Figure 4 This is a graph showing the relationship between impeller pressure pulsation and air injection volume;

[0017] Figure 5 This is a graph showing the relationship between guide vane pressure pulsation and air injection volume;

[0018] Figure 6 This is a graph showing the relationship between head and injection volume;

[0019] Figure 7 This is a graph showing the relationship between efficiency and gas injection volume. Detailed Implementation

[0020] The technical solutions of the present invention 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 invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0021] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] like Figure 1-7 As shown, a novel air-injection vibration reduction and noise reduction device for a blade pump includes a flange 3, a medium pipe 4, and an air-injection component. The flange 3 connects to the air-injection component, and multiple medium pipes 4 are detachably and uniformly arranged circumferentially at one end of the flange 3. It also includes a pump body 1, with a flange 2 fixedly mounted at one end. The flange 2 is threadedly connected to the flange 3, and the medium pipes 4 are located inside the pump body 1. The air-injection component injects gas into the annular cavity 302 inside the flange 3. The gas exits into the pump body 1 through the air outlet 401 on the medium pipe 4. The gas injected into the pump body 1 forms bubbles between the liquid being pumped. Due to its compressibility, the gas can absorb and mitigate some vibration energy, thereby reducing vibration transmission. It can also buffer the impact force of the liquid flowing inside the pump, absorb some turbulent energy, and act as a damper, thereby reducing turbulence intensity and reducing vibration and noise caused by fluid flow. Furthermore, the gas at the pump wall reduces the direct impact between the liquid and the pump wall, which also reduces noise levels to some extent.

[0023] like Figure 1-2As shown, flange 3 is annular, with an annular cavity 302 inside. An air inlet 301 is radially arranged on the outer side of flange 3. One end of the air inlet 301 on the inner side of flange 3 connects to the annular cavity 302, and the other end on the outer side of flange 3 connects to an injection component, which controls the flow rate of the injected gas. Multiple threaded holes 303 are evenly distributed around one end of flange 3, connecting to the annular cavity 302. A threaded portion 402 is provided on the outer side of one end of medium pipe 4, and the threaded portion 402 is threaded into the threaded holes 303. Medium pipe 4 and flange 3 are detachably connected via threads. Multiple sets of air outlets are evenly distributed around the outer circumference of medium pipe 4, each set including multiple air outlets 401 evenly arranged along the length of medium pipe 4. Different pumps have different injection methods due to differences in flow rate and head. Using the same air injection method without considering pump differences will not only fail to optimize pump noise and vibration but may even worsen them. Different medium pipes 4 are used on different vane pumps, each with a different outlet hole 401 size. Gas flow and bubble size are controlled through the air injection components and outlet hole 401 to adapt to different types of vane pumps. The medium pipe 4 is a pipe with one open end and one closed end, approximately 25cm in length, and the outlet hole 401 has a diameter between 10-100nm.

[0024] like Figure 1 As shown, the gas injection component includes an inlet pipe 8, one end of which is connected to a flange 3, and the other end of which is connected to a gas injection pump 12. The inlet pipe 8 is also equipped with a check valve 9, a gas flow meter 10, and a control valve 11. The gas flow meter 10, control valve 11, and gas injection pump 12 are electrically connected to a control unit. The check valve 9 is used to prevent backflow of liquid in the medium pipe 4, the gas flow meter 10 is used to monitor the injected gas flow rate, and the control valve 11 is used to control the magnitude of the injected gas flow rate.

[0025] In addition, such as Figure 3-7 As shown, in actual use, by repeatedly adjusting the size of the outlet 401 (by replacing the medium pipe 4) and the gas flow rate, and by monitoring the noise levels at the pump inlet and outlet, as well as the pressure pulsation relationship between the impeller and guide vanes, a suitable gas flow rate and orifice size were obtained. During the actual experiment, a 3-6 dB decrease in inlet and outlet noise was observed. The pressure pulsation at the impeller inlet position showed a significant decrease, reaching 34%. The pressure pulsation at the middle and outlet positions of the guide vanes decreased by approximately 33%, and the pressure pulsation at the guide vane inlet position decreased by 20%. When the injection volume was less than 0.5% of the pump flow rate, the head and efficiency did not change significantly. The deviation of head and efficiency from the injection volume was less than 1%, and at certain injection volumes, the head and efficiency even increased. The experimental results indicate that this device does not adversely affect the pump's head and efficiency; in some cases, it may even have a promoting effect.

[0026] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A novel blade pump air injection vibration reduction and noise reduction device, characterized in that: It includes a flange (3), a medium pipe (4) and an injection component; the flange (3) is connected to the injection component, and a plurality of medium pipes (4) are uniformly and detachably arranged in the circumferential direction at one end of the flange (3).

2. The novel blade pump air injection vibration reduction and noise reduction device according to claim 1, characterized in that: The flange (3) has an annular cavity (302) inside, and an air inlet (301) is provided radially on the outer side of the flange (3). The air inlet (301) is located on the inner side of the flange (3) and connects to the annular cavity (302). The air inlet (301) is located on the outer side of the flange (3) and connects to the air injection component.

3. The novel blade pump air injection vibration reduction and noise reduction device according to claim 2, characterized in that: The flange (3) has a plurality of threaded holes (303) evenly distributed around one end. The threaded holes (303) are connected to the annular cavity (302). The medium pipe (4) has a threaded part (402) on the outer side of one end. The threaded part (402) is threadedly connected to the threaded hole (303).

4. The novel blade pump air injection vibration reduction and noise reduction device according to claim 1, characterized in that: Multiple sets of air outlets are uniformly arranged on the outer circumference of the medium tube (4), and the air outlets include multiple air outlets (401) uniformly arranged along the length of the medium tube (4).

5. The novel blade pump air injection vibration reduction and noise reduction device according to claim 1, characterized in that: The gas injection component includes an air inlet pipe (8), one end of which is connected to the flange (3), and the other end of which is connected to an air injection pump (12). The air inlet pipe (8) is also equipped with a one-way valve (9), a gas flow meter (10), and a control valve (11). The gas flow meter (10), the control valve (11), and the air injection pump (12) are electrically connected to a control unit.

6. The novel blade pump air injection vibration reduction and noise reduction device according to claim 1, characterized in that: It also includes a pump body (1), one end of which is fixedly provided with a flange (2), the flange (2) is threadedly connected to the flange plate (3), and the medium pipe (4) is located inside the pump body (1).

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