Water pump suction section structure

Abstract

The utility model provides a water pump suction section structure which comprises a suction inlet and a suction section water cavity, the front portion of the suction section water cavity, namely the portion, close to an impeller inlet, of the suction section water cavity forms a tapered pipe section, and the end, with the smaller caliber, of the tapered pipe section is close to the impeller inlet. And a spiral flow guide thread is formed on the inner wall of the tapered pipe section. A first distribution plate is arranged at one end, with a larger caliber, of the tapered pipe section, a plurality of through holes are formed in the first distribution plate, and the first distribution plate is fixed with the inner wall of the tapered pipe section. According to the suction section structure of the water pump, the front portion of the water cavity of the suction section forms the tapered pipe section, so that water flow can have more time to be evenly distributed again, the speed of liquid flow near an impeller inlet is evenly distributed with the help of other flow guide structures, and normal operation of the water pump is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of water pumps, in particular to a water pump suction section structure. Background Art

[0002] Centrifugal pumps all include a suction section and a discharge section, sucking foreign substances from the impeller axis position and then discharging them from the side of the centrifugal pump impeller. Figure 1 Shown is a schematic structural diagram of a multi-stage water pump. As Figure 1 shown, water enters the suction section water chamber 51 through the suction port 1, then enters the multi-stage impellers in the middle section 2, and finally is output from the discharge port 3. The part where the suction section water chamber 51 is located is called the suction section 5. The function of the suction section is to ensure that the liquid flows into the impeller inlet with the least frictional loss, ensure that the impeller inlet is evenly filled with liquid, make the liquid flow velocity evenly distributed, and ensure the suction capacity of the impeller.

[0003] Figure 2 Shown is a schematic diagram of the existing water pump suction section structure. As Figure 2 shown, it can be seen that the front part of the suction section water chamber 51, that is, the part close to the impeller, is basically perpendicular to the pump shaft axis. Such a structure makes the changes in pressure and velocity rather abrupt, actually not conducive to the uniform distribution of the liquid flow velocity, not conducive to the normal operation of the water pump, especially more disadvantageous for multi-stage pumps with large head and large flow rate.

[0004] The utility model attempts to solve the above problems and proposes a water pump suction section structure to help the liquid flow velocity near the impeller inlet be evenly distributed and ensure the normal operation of the water pump. Summary of the Utility Model

[0005] The utility model proposes a water pump suction section structure to help the liquid flow velocity near the impeller inlet be evenly distributed and ensure the normal operation of the water pump.

[0006] The utility model provides a water pump suction section structure, including a suction port and a suction section water chamber. The front part of the suction section water chamber, that is, the part of the suction section water chamber close to the impeller inlet, is formed as a tapered pipe section, and the smaller-diameter end of the tapered pipe section is close to the impeller inlet.

[0007] Furthermore, spiral-shaped guiding threads are formed on the inner wall of the tapered pipe section.

[0008] Furthermore, a first distribution plate is arranged at the larger-diameter end of the tapered pipe section, and a plurality of through holes are arranged on the first distribution plate. The first distribution plate is fixed to the inner wall of the tapered pipe section.

[0009] Further, a second distribution plate is provided at the smaller-diameter end of the tapered pipe section. A plurality of through holes are provided on the second distribution plate, and the second distribution plate is fixed to the inner wall of the tapered pipe section.

[0010] Further, guide vanes are provided in the water chamber of the suction section to help the water flow into the tapered pipe section.

[0011] The water pump suction section structure proposed by the present utility model forms the front part of the suction section water chamber into a tapered pipe section, enabling the water flow to have more time to redistribute evenly, and with the help of the setting of other flow guiding structures, helping the liquid flow velocity near the impeller inlet to be evenly distributed, ensuring the normal operation of the water pump. Description of the Drawings

[0012] Figure 1 Shown is a schematic structural diagram of a multi-stage water pump.

[0013] Figure 2 Shown is a schematic diagram of the structure of an existing water pump suction section.

[0014] Figure 3 Shown is a schematic diagram of the structure of the water pump suction section according to an embodiment of the present utility model.

[0015] Reference Signs:

[0016] 1: Suction port; 2: Middle section; 3: Discharge port; 4: Pump shaft; 5: Suction section; 51: Suction section water chamber;

[0017] 52: Front part of the suction section water chamber; 53: First distribution plate; 54: Second distribution plate; 55: Flow guiding thread. Detailed Embodiment

[0018] To further understand the purpose, structure, features, and functions of the present utility model, the following is a detailed description in conjunction with embodiments.

[0019] Figure 3 Shown is a schematic diagram of the structure of the water pump suction section according to an embodiment of the present utility model. As Figure 3As shown in the figure, an embodiment of the present utility model provides a water pump suction section structure, which includes a suction port 1 and a suction section water chamber 51. The front part 52 of the suction section water chamber, that is, the part of the suction section water chamber 51 close to the impeller inlet, is formed into a tapered pipe section, and the end with a smaller diameter of the tapered pipe section is close to the impeller inlet. By forming the front part 52 of the suction section water chamber into a tapered pipe section, the speed and pressure changes in the section from the suction section water chamber 51 to the impeller inlet become more gentle, which is beneficial to the stable operation of the water pump; by forming the front part 52 of the suction section water chamber into a tapered pipe section, it is beneficial to the re - uniform distribution of the liquid flow velocity and improves the suction efficiency near the impeller inlet; by making the end with a smaller diameter of the tapered pipe section face the impeller inlet, the liquid flow tends to concentrate towards the central part of the impeller, thereby improving the suction efficiency of the impeller inlet.

[0020] As Figure 3 shown, on the inner wall of the front part 52 of the suction section water chamber, that is, the tapered pipe section, a spiral - shaped flow - guiding thread 55 can be formed to help the liquid flow redistribute the velocity and flow towards the impeller inlet. A first distribution plate 53 can be arranged at the end with a larger diameter of the tapered pipe section. A plurality of through - holes are arranged on the first distribution plate 53, and the first distribution plate 53 is fixed to the inner wall of the tapered pipe section. The first distribution plate 53 redistributes the velocity of the liquid flow entering the front part 52 of the suction section water chamber, further achieving uniform distribution. A second distribution plate 54 can be arranged at the end with a smaller diameter of the tapered pipe section. A plurality of through - holes are arranged on the second distribution plate 54, and the second distribution plate 54 is fixed to the inner wall of the tapered pipe section. The second distribution plate 54 redistributes the velocity of the liquid flow entering the impeller inlet, further achieving uniform distribution.

[0021] Furthermore, a guide vane (not shown in the figure) can be arranged in the suction section water chamber 51 to help the water flow into the front part 52 of the suction section water chamber.

[0022] In the water pump suction section structure proposed by the present utility model, the front part of the suction section water chamber is formed into a tapered pipe section, so that the water flow can have more time to redistribute uniformly, and with the help of the setting of other flow - guiding structures, it helps the liquid flow velocity near the impeller inlet to be uniformly distributed, ensuring the normal operation of the water pump.

[0023] In the description of the present utility model, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" orientation or position relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present utility model.

[0024] The present utility model has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present utility model. On the contrary, modifications and refinements made without departing from the spirit and scope of the present utility model fall within the scope of patent protection of the present utility model.

Claims

1. A structure of the suction section of a water pump, comprising a suction port and a suction section water chamber, wherein the suction port is located on the side of the axis of the pump shaft, and is characterized in that the front part of the suction section water chamber, that is, the part of the suction section water chamber close to the impeller inlet, is formed as a tapered pipe section, and the smaller-diameter end of the tapered pipe section is close to the impeller inlet.

2. The structure of the suction section of the water pump according to claim 1, characterized in that, A spiral-shaped flow guiding thread is formed on the inner wall of the tapered pipe section.

3. The structure of the suction section of the water pump according to claim 1, wherein, A first distribution plate is arranged at the larger-diameter end of the tapered pipe section, and a plurality of through holes are arranged on the first distribution plate, and the first distribution plate is fixed to the inner wall of the tapered pipe section.

4. The structure of the suction section of the water pump according to claim 1, characterized in that, A second distribution plate is arranged at the smaller-diameter end of the tapered pipe section, and a plurality of through holes are arranged on the second distribution plate, and the second distribution plate is fixed to the inner wall of the tapered pipe section.

5. The structure of the suction section of the water pump according to claim 1, characterized in that, A guide vane is arranged in the suction section water chamber to help the water flow into the tapered pipe section.

Images