Marine low-vibration low-noise vertical self-priming centrifugal pump
By designing protective and vibration damping mechanisms, the vibration energy is consumed through air compression and resistance, and noise is blocked by the inner cavity of the outer shell, thus solving the vibration and noise problems of centrifugal pumps and achieving the effect of low vibration and low noise.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHANGJIAGANG HAIGONG SHIP MACHINERY MFGCO
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-01
AI Technical Summary
The vibration and noise generated by centrifugal pumps during operation affect the working environment of users and surrounding staff.
It employs protective and vibration damping mechanisms, including fixed columns, springs, movable plates, connecting rods, support plates, exhaust pipes, and adjusting plugs, to dissipate vibration energy through air compression and resistance, and to reduce vibration and noise by blocking noise within the outer shell cavity.
It effectively reduces the vibration and noise of centrifugal pumps caused by impeller rotation and water flow, protects the pump structure, and improves the working environment.
Smart Images
Figure CN224187817U_ABST
Abstract
Description
A marine vertical self-priming centrifugal pump with low vibration and low noise Technical Field
[0001] This utility model relates to the field of centrifugal pumps, and in particular to a marine vertical self-priming centrifugal pump with low vibration and low noise. Background Technology
[0002] A self-priming centrifugal pump is a type of centrifugal pump with a self-priming function. Its working principle involves filling the pump body and suction pipe with liquid before starting the pump. When the impeller rotates, the liquid at the center of the impeller is thrown out, creating a low-pressure zone. Under the pressure difference between the external atmospheric pressure and this low-pressure zone, liquid is continuously drawn into the pump. Through the rotation of the impeller, the liquid gains energy and is then forced out of the pump body, thus achieving liquid transport.
[0003] Centrifugal pumps vibrate during operation due to the rotation of the impeller and the flow of water. Prolonged and large vibration amplitudes can cause the centrifugal pump to loosen between itself and the mounting bracket, affecting its use. At the same time, the vibration of the centrifugal pump will generate noise, which is not conducive to the work of the surrounding personnel. Summary of the Invention
[0004] In view of this, the present invention provides a marine low-vibration and low-noise vertical self-priming centrifugal pump, the main technical problem to be solved is: to reduce the vibration and noise generated during the operation of the centrifugal pump.
[0005] To achieve the above objectives, this utility model adopts the following technical solution: a marine low-vibration, low-noise vertical self-priming centrifugal pump, comprising a protective mechanism, an internal vibration damping mechanism, and a centrifugal pump mounted on the vibration damping mechanism. The protective mechanism includes a housing, and the vibration damping mechanism includes a fixed column, which is fixedly installed at the inner bottom of the housing. A spring is installed inside the fixed column, and a movable plate is movably connected inside the fixed column. The movable plate is located above the spring, and a connecting rod is fixedly connected to the top of the movable plate. A support plate is fixedly connected to the top of the connecting rod, and the centrifugal pump is mounted on the support plate. An exhaust pipe is fixedly connected to the side wall of the fixed column. The exhaust pipe is a reducing pipe, and an adjusting plug is threaded inside the exhaust pipe. A protrusion is fixedly connected to the side end of the adjusting plug. There are multiple protrusions, each with a conical structure, located inside the exhaust pipe.
[0006] By adopting the above technical solution, the vibration damping mechanism transmits the vibration generated by the impeller rotation and water flow of the centrifugal pump to the spring during use. The spring is repeatedly compressed, causing the moving plate to move up and down continuously inside the fixed column. When the moving plate moves downward, it compresses the air inside the fixed column. The air compression generates resistance, which continuously consumes the impact of vibration. The compressed air is discharged from the exhaust pipe. Rotating the position of the adjusting plug can change the size of the internal hole of the convex strip, thereby changing the resistance when the air is discharged. This helps to reduce the vibration generated by the impeller rotation and water flow during the use of the centrifugal pump, thereby reducing the noise generated by the centrifugal pump.
[0007] As a further description of the above technical solution:
[0008] The inner wall of the outer shell is fixedly connected with a flange, which is located above the support plate.
[0009] By adopting the above technical solution, the flange can limit the support plate, thereby restricting the vibration amplitude of the centrifugal pump and protecting structures such as springs.
[0010] As a further description of the above technical solution:
[0011] The outer shell has an internal cavity.
[0012] By adopting the above technical solution, the inner cavity can effectively block the noise generated during the operation of the centrifugal pump, making the centrifugal pump easier to use.
[0013] As a further description of the above technical solution:
[0014] The centrifugal pump includes a motor, which is mounted above a support plate. A rotating shaft is fixedly connected to the output end of the motor, and an impeller is fixedly connected to the end of the rotating shaft away from the motor, with the impeller located below the support plate.
[0015] By adopting the above technical solution, the centrifugal pump has a self-priming function, which is facilitated by the motor driving the shaft to rotate and in turn driving the impeller to rotate.
[0016] As a further description of the above technical solution:
[0017] The bottom of the motor is fixedly connected to a volute, and the impeller is located inside the volute.
[0018] By adopting the above technical solution, the volute can protect the impeller and facilitate the centrifugal pump to pump water.
[0019] As a further description of the above technical solution:
[0020] The bottom of the volute is fixedly connected to a first connecting tube, and the end of the first connecting tube away from the volute extends to the outside of the outer shell.
[0021] By adopting the above technical solution, the first connecting pipe facilitates the centrifugal pump to extract water flow during operation.
[0022] As a further description of the above technical solution:
[0023] A second connecting pipe is fixedly connected to the side wall of the volute, and the end of the second connecting pipe away from the volute extends to the outside of the outer shell.
[0024] By adopting the above technical solution, the second connecting pipe facilitates the discharge of the pumped water during operation.
[0025] By employing the above technical solution, the marine low-vibration and low-noise vertical self-priming centrifugal pump of this utility model has at least the following beneficial effects:
[0026] 1. Compared with existing technologies, this marine low-vibration and low-noise vertical self-priming centrifugal pump, through a vibration damping mechanism, transmits the vibration generated by the impeller rotation and water flow during operation to the spring. The spring is repeatedly compressed, causing the moving plate to move up and down continuously inside the fixed column. When the moving plate moves downward, it compresses the air inside the fixed column. The air compression generates resistance, continuously absorbing the impact of vibration. The compressed air is discharged from the exhaust pipe. Rotating the position of the adjusting plug can change the size of the internal aperture of the convex strip, thereby changing the resistance when the air is discharged. This facilitates the reduction of vibration generated by the impeller rotation and water flow during operation, thus reducing the noise generated by the centrifugal pump.
[0027] 2. Compared with the existing technology, this marine low-vibration and low-noise vertical self-priming centrifugal pump can effectively block the noise generated during the operation of the centrifugal pump through the internal cavity inside the shell, which facilitates the use of the centrifugal pump. Attached Figure Description
[0028] Figure 1 is a schematic diagram of the overall structure of a marine low-vibration and low-noise vertical self-priming centrifugal pump proposed in this utility model.
[0029] Figure 2 is a front view of the overall structure of a marine low-vibration and low-noise vertical self-priming centrifugal pump proposed in this utility model.
[0030] Figure 3 is a first-view internal structural cross-sectional view of a marine low-vibration and low-noise vertical self-priming centrifugal pump proposed in this utility model.
[0031] Figure 4 is a second-view internal structural cross-sectional view of a marine low-vibration and low-noise vertical self-priming centrifugal pump proposed in this utility model.
[0032] Figure 5 is a third-angle internal structural cross-sectional view of a marine low-vibration and low-noise vertical self-priming centrifugal pump proposed in this utility model.
[0033] Figure 6 is an enlarged view of section A in Figure 5 of a marine low-vibration and low-noise vertical self-priming centrifugal pump proposed in this utility model.
[0034] Legend:
[0035] 1. Protective mechanism; 101. Outer shell; 102. Flange; 103. Inner cavity; 2. Vibration damping mechanism; 201. Fixed column; 202. Spring; 203. Moving plate; 204. Connecting rod; 205. Support plate; 206. Exhaust pipe; 207. Adjusting plug; 208. Raised strip; 3. Centrifugal pump; 301. Motor; 302. Rotating shaft; 303. Impeller; 304. Volute; 305. First connecting pipe; 306. Second connecting pipe. Detailed Implementation
[0036] Referring to Figures 1-6, this utility model provides a marine low-vibration, low-noise vertical self-priming centrifugal pump: It includes a protective mechanism 1, a vibration damping mechanism 2 installed inside the protective mechanism 1, and a centrifugal pump 3 mounted on the vibration damping mechanism 2. The protective mechanism 1 includes a housing 101, and the vibration damping mechanism 2 includes a fixing column 201, which is fixedly installed at the inner bottom of the housing 101. A spring 202 is installed inside the fixing column 201, and a movable plate 203 is movably connected inside the fixing column 201. A rubber ring is provided on the side of the movable plate 203, and the outer surface of the rubber ring is in contact with the inner surface of the fixing column 201. The movable plate 203 is located at the spring... Above 202, one end of spring 202 is fixedly connected to the inner bottom of housing 101, and the other end is fixedly connected to the bottom of movable plate 203. Movable plate 203 can move up and down inside fixed column 201. A connecting rod 204 is fixedly connected to the top of movable plate 203, and a support plate 205 is fixedly connected to the top of connecting rod 204. Centrifugal pump 3 is mounted on support plate 205. The vibration generated by centrifugal pump 3 is transmitted to spring 202. An exhaust pipe 206 is fixedly connected to the side wall of fixed column 201. Exhaust pipe 206 is a reducing pipe. The inner diameter of the end of exhaust pipe 206 near fixed column 201 is smaller than that of the end of exhaust pipe 206 away from fixed column 201. The inner diameter of one end of the fixed column 201 is connected to the internal thread of the exhaust pipe 206, and an adjusting plug 207 is connected to the internal thread. A protrusion 208 is fixedly connected to the side end of the adjusting plug 207. There are multiple protrusions 208, each with a conical structure, located inside the exhaust pipe 206. The protrusions 208 are made of rubber and can deform under pressure. The central parts of the multiple protrusions 208 form an exhaust channel. When the protrusions 208 move into the exhaust pipe 206, the diameter of the exhaust channel decreases, increasing the resistance when air is discharged. During use, the centrifugal pump 3 vibrates due to the rotation of the impeller 303 and the flow of water. The vibration is transmitted to the spring 202, which is repeatedly compressed, causing the moving plate 203 to move up and down continuously inside the fixed column 201. When the moving plate 203 moves downward, it compresses the air inside the fixed column 201. The air generates resistance when compressed, which continuously consumes the impact of vibration. After compression, the air is discharged from the exhaust pipe 206. Rotating the position of the adjusting plug 207 can change the size of the internal aperture of the protrusion 208, thereby changing the resistance when the air is discharged. This helps to reduce the vibration generated by the rotation of the impeller 303 and the flow of water when the centrifugal pump 3 is in use, thereby reducing the noise generated by the centrifugal pump 3.
[0037] A flange 102 is fixedly connected to the inner wall of the outer casing 101. The flange 102 is located above the support plate 205. The flange 102 can limit the support plate 205, limit the vibration amplitude of the centrifugal pump 3, and protect the spring 202 and other structures.
[0038] The outer casing 101 has an inner cavity 103 inside, which can effectively block the noise generated by the centrifugal pump 3 during operation, making it convenient to use the centrifugal pump 3.
[0039] The centrifugal pump 3 includes a motor 301, which is mounted above a support plate 205. A rotating shaft 302 is fixedly connected to the output end of the motor 301. An impeller 303 is fixedly connected to the end of the rotating shaft 302 furthest from the motor 301, and the impeller 303 is located below the support plate 205. The motor 301 drives the rotating shaft 302 to rotate, which in turn drives the impeller 303 to rotate, giving the centrifugal pump 3 a self-priming function for easy water pumping. A volute 304 is fixedly connected to the bottom of the motor 301, and the impeller 303 is located inside the volute 304. The impeller 303 is protected, and the centrifugal pump 3 can pump water. The bottom of the volute 304 is fixedly connected to a first connecting pipe 305. The end of the first connecting pipe 305 away from the volute 304 extends to the outside of the outer shell 101. The centrifugal pump 3 can draw water during operation through the first connecting pipe 305. The side wall of the volute 304 is fixedly connected to a second connecting pipe 306. The end of the second connecting pipe 306 away from the volute 304 extends to the outside of the outer shell 101. The centrifugal pump 3 can discharge the drawn water during operation through the second connecting pipe 306.
[0040] Working principle: During use, the centrifugal pump 3 vibrates due to the rotation of the impeller 303 and the flow of water, which is transmitted to the spring 202. The spring 202 is repeatedly compressed, causing the moving plate 203 to move up and down continuously inside the fixed column 201. When the moving plate 203 moves downward, it compresses the air inside the fixed column 201. The air compression generates resistance, which continuously consumes the impact of vibration. The compressed air is discharged from the exhaust pipe 206. Rotating the position of the adjusting plug 207 can change the size of the internal aperture of the protrusion 208, thereby changing the resistance when the air is discharged. This helps to reduce the vibration generated by the rotation of the impeller 303 and the flow of water during the use of the centrifugal pump 3, thereby reducing the noise generated by the centrifugal pump 3.
[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A marine-grade, low-vibration, low-noise vertical self-priming centrifugal pump, comprising a protective mechanism (1), characterized in that: The protective mechanism (1) is equipped with a vibration damping mechanism (2), and a centrifugal pump (3) is installed on the vibration damping mechanism (2). The protective mechanism (1) includes a housing (101), and the vibration damping mechanism (2) includes a fixed column (201). The fixed column (201) is fixedly installed at the inner bottom of the housing (101). A spring (202) is installed inside the fixed column (201). A movable plate (203) is movably connected inside the fixed column (201). The movable plate (203) is located above the spring (202), and a connecting rod is fixedly connected to the top of the movable plate (203). The rod (204) is fixedly connected to the top of the connecting rod (204) with a support plate (205). The centrifugal pump (3) is installed on the support plate (205). The side wall of the fixed column (201) is fixedly connected to an exhaust pipe (206). The exhaust pipe (206) is a reducing pipe. The internal thread of the exhaust pipe (206) is connected to an adjusting plug (207). The side end of the adjusting plug (207) is fixedly connected to a protrusion (208). There are multiple protrusions (208). The protrusions (208) are conical structures and are located inside the exhaust pipe (206).
2. The marine low-vibration, low-noise vertical self-priming centrifugal pump according to claim 1, characterized in that: The inner wall of the outer shell (101) is fixedly connected with a flange (102), which is located above the support plate (205).
3. The marine low-vibration, low-noise vertical self-priming centrifugal pump according to claim 1, characterized in that: The outer shell (101) has an inner cavity (103) inside.
4. A marine low-vibration, low-noise vertical self-priming centrifugal pump according to claim 1, characterized in that: The centrifugal pump (3) includes a motor (301), which is mounted above the support plate (205). The output end of the motor (301) is fixedly connected to a rotating shaft (302), and an impeller (303) is fixedly connected to the end of the rotating shaft (302) away from the motor (301), and the impeller (303) is located below the support plate (205).
5. A marine low-vibration, low-noise vertical self-priming centrifugal pump according to claim 4, characterized in that: The bottom of the motor (301) is fixedly connected to a volute (304), and the impeller (303) is located inside the volute (304).
6. A marine low-vibration, low-noise vertical self-priming centrifugal pump according to claim 5, characterized in that: The bottom of the volute (304) is fixedly connected to a first connecting tube (305), and the end of the first connecting tube (305) away from the volute (304) extends to the outside of the outer shell (101).
7. A marine low-vibration, low-noise vertical self-priming centrifugal pump according to claim 5, characterized in that: The side wall of the volute (304) is fixedly connected to a second connecting pipe (306), and the end of the second connecting pipe (306) away from the volute (304) extends to the outside of the outer shell (101).