Built-in counter-rotating small flow axial flow pump

Abstract

The utility model discloses a built -in counter -rotating small flow axial flow pump, the utility model relates to axial flow pump technical field. Including axial flow pump main part, be provided with the installation mechanism for the operation of axial flow pump on the axial flow pump main part, and the installation mechanism includes: impeller subassembly, including the water inlet of the horizontal inside setting of axial flow pump main part, the vertical direction of axial flow pump main part is provided with the drain, the inner wall fixed with first fixed plate of water inlet, the utility model adopts the structure of first impeller and second impeller counter -rotating, compared with traditional single -impeller axial flow pump, can more effectively increase the speed and pressure of water flow, improve the lift and flow of pump, can also guarantee good conveying effect under the demand of small flow, and first fixed plate and second fixed plate respectively to drive shaft and vertical shaft are positioned and supported, cooperate the lubrication of bearing main body, reduce the friction loss and the vibration and the deflection of operation when the shafting operation, promote transmission efficiency.

Description

Technical Field

[0001] This utility model relates to the field of axial flow pump technology, specifically a built-in counter-rotating small flow axial flow pump. Background Technology

[0002] Axial flow pumps, as a type of high-efficiency fluid machinery, are widely used in farmland irrigation, water conservancy projects, industrial circulating water systems, and ship ballast adjustment. They are characterized by large flow rates, relatively low head, and compact structure. In many applications, especially in situations with limited space or special requirements for delivery parameters, an axial flow pump that can provide a stable and sufficient head even at relatively low flow rates is often needed.

[0003] Traditional axial flow pumps typically employ a single impeller structure. Their working principle relies on the centrifugal force generated by the impeller's rotation to energize the water flow, thereby achieving water transport. However, when transporting water, traditional single-impeller axial flow pumps only rely on a single impeller to perform work on the water flow, resulting in limited increases in the water's velocity and pressure. In low-flow-rate scenarios, due to the small flow rate, a single impeller cannot effectively increase the water's velocity and pressure, leading to insufficient pump head and flow rate, resulting in poor transport performance. Furthermore, the shaft system of a single-impeller axial flow pump lacks effective positioning and support structures during operation, with the drive shaft relying solely on simple bearings for support. During prolonged high-speed operation, this can easily lead to significant wear due to friction. Additionally, vibration and swaying may occur during operation. Moreover, in actual operation, the fluid sucked into the axial flow pump often contains suspended particles, aquatic organisms, or other impurities. If these impurities directly enter the pump chamber, they can impact, wear down, or even jam the high-speed rotating impeller and the precision-fitted clearance. Therefore, this invention provides a built-in counter-rotating low-flow axial flow pump. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a built-in counter-rotating small-flow axial flow pump. This solves the problem that traditional single-impeller axial flow pumps, when conveying water, rely solely on a single impeller to perform work on the water flow, resulting in limited increases in velocity and pressure. In low-flow scenarios, due to the small flow rate, a single impeller cannot effectively increase the water velocity and pressure, leading to insufficient pump head and flow rate, resulting in poor conveying performance. Furthermore, the shaft system of a single-impeller axial flow pump lacks effective positioning and support structures during operation, relying solely on simple bearings for support. During prolonged high-speed operation, this can easily lead to significant wear due to friction, and vibration and swaying may occur during operation. Additionally, in actual operation, the fluid drawn into the axial flow pump often contains suspended particles, aquatic organisms, or other impurities. If these impurities directly enter the pump chamber, they can impact, wear down, or even jam the high-speed rotating impeller and the precision-fitted clearance.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a built-in counter-rotating small-flow axial flow pump, comprising an axial flow pump body, wherein the axial flow pump body is provided with a mounting mechanism for the operation of the axial flow pump, the mounting mechanism comprising: An impeller assembly includes a water inlet horizontally disposed inside an axial flow pump body, a water outlet vertically disposed in the axial flow pump body, a first fixing plate fixed to the inner wall of the water inlet, a bearing body disposed inside the first fixing plate, a drive shaft connected inside the bearing body, a first impeller fixed to the outer wall of the drive shaft, a second fixing plate fixed to the inner wall of the water outlet, a vertical shaft disposed inside the second fixing plate, and a second impeller fixed to the outer wall of the vertical shaft; The filter assembly includes a fixing ring fixed to the inner wall of the inlet, an mounting ring connected to the inner wall of the fixing ring via a shock-absorbing component, mounting blocks uniformly fixed to the inner wall of the mounting ring, and a filter screen bracket connected to the inner wall of the mounting block via a detachable component.

[0006] Preferably, one end of the axial flow pump body is provided with a motor body for driving, and the drive shaft is connected to the output end of the motor body.

[0007] Preferably, a second bevel gear is fixed to the outer wall of the drive shaft, and a first bevel gear that meshes with the second bevel gear is fixed to the lower end of the vertical shaft.

[0008] Preferably, the shock absorption assembly includes a support shell with evenly distributed support shells on the inner wall of a fixed ring. A shock absorption spring is provided inside the support shell. A damping rod is provided on the inner ring of the shock absorption spring. The damping rod is fixedly connected to the support shell. A movable rod is fixed to the other end of the shock absorption spring. The movable rod is slidably connected to the inner wall of the support shell. The mounting ring is located at the other end of the movable rod and is fixedly connected.

[0009] Preferably, the sidewall of the fixing ring is evenly distributed with sliding rods, and the mounting ring is slidably connected to the sliding rods.

[0010] Preferably, the detachable component includes a positioning rod fixed to the side wall of the mounting block, the filter support being slidably connected to the outer wall of the positioning rod, and bolts being provided inside the filter support for connection with the mounting block.

[0011] Beneficial effects This invention provides a built-in counter-rotating small-flow axial flow pump. Compared with the prior art, it has the following advantages: Firstly, this utility model adopts a counter-rotating structure of the first impeller and the second impeller. Compared with the traditional single impeller axial flow pump, it can more effectively increase the speed and pressure of the water flow, improve the pump head and flow rate, and ensure a good conveying effect even under small flow requirements. The first fixed plate and the second fixed plate respectively position and support the drive shaft and the vertical shaft. With the lubrication of the bearing body, the friction loss during shaft operation and the vibration and sway during operation are reduced, thereby improving the transmission efficiency.

[0012] Secondly, when water flows into the axial flow pump body from the inlet, it first passes through the filter screen installed on the filter screen bracket. The filter screen can effectively filter impurities in the water flow, preventing impurities from entering the axial flow pump and avoiding problems such as wear and jamming of impurities in components such as the impeller. This extends the service life of the pump and ensures its normal operation. The shock absorption component can reduce the impact of water flow on the filter screen, reducing the possibility of damage to the filter screen due to long-term impact, further improving the service life of the filter screen and reducing maintenance costs. At the same time, the modular and detachable design allows the filter screen bracket to be adapted to filter screens of different pore sizes and materials, meeting the filtration needs under different working conditions, improving the versatility and adaptability of the equipment, and facilitating the disassembly of the filter screen for cleaning. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the axial flow pump body of this utility model; Figure 3 This is a schematic diagram of the filter support connection structure of this utility model; Figure 4 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle.

[0014] In the diagram: 1. Axial flow pump body; 2. Motor body; 201. Drain outlet; 202. Inlet; 3. Drive shaft; 301. First impeller; 302. First fixed plate; 303. Bearing body; 304. Second fixed plate; 305. Vertical shaft; 306. Second impeller; 307. First bevel gear; 308. Second bevel gear; 4. Fixed ring; 401. Support shell; 402. Shock-absorbing spring; 403. Damping support rod; 404. Movable rod; 405. Mounting ring; 406. Slide rod; 5. Mounting block; 501. Positioning rod; 502. Filter screen bracket; 503. Bolt. Detailed Implementation

[0015] 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.

[0016] Please see Figures 1-4 This utility model provides a technical solution: a built-in counter-rotating small-flow axial flow pump, including an axial flow pump body 1, on which an installation mechanism for the operation of the axial flow pump is provided, the installation mechanism including: The impeller assembly includes an inlet 202 horizontally disposed inside the axial flow pump body 1, a drain outlet 201 vertically disposed in the axial flow pump body 1, a first fixing plate 302 fixed to the inner wall of the inlet 202, a bearing body 303 disposed inside the first fixing plate 302, a drive shaft 3 connected inside the bearing body 303, a first impeller 301 fixed to the outer wall of the drive shaft 3, a second fixing plate 304 fixed to the inner wall of the drain outlet 201, a vertical shaft 305 disposed inside the second fixing plate 304, and a second impeller 306 fixed to the outer wall of the vertical shaft 305. The filter assembly includes a fixing ring 4 fixed to the inner wall of the inlet 202, an installation ring 405 connected by a shock-absorbing component on the inner wall of the fixing ring 4, an installation block 5 evenly fixed to the inner wall of the installation ring 405, and a filter screen bracket 502 connected by a detachable component inside the installation block 5.

[0017] In a preferred embodiment, one end of the axial flow pump body 1 is provided with a motor body 2 for driving, and a drive shaft 3 is connected to the output end of the motor body 2. A second bevel gear 308 is fixed on the outer wall of the drive shaft 3, and a first bevel gear 307 that meshes with the second bevel gear 308 is fixed at the lower end of the vertical shaft 305.

[0018] Specifically, when the motor body 2 starts, its output end drives the drive shaft 3 to rotate. When the drive shaft 3 rotates, on the one hand, the first impeller 301 fixed on the outer wall of the drive shaft 3 rotates accordingly, drawing water from the inlet 202. On the other hand, the second bevel gear 308 fixed on the outer wall of the drive shaft 3 rotates. Since the second bevel gear 308 meshes with the first bevel gear 307 fixed at the lower end of the vertical shaft 305, the first bevel gear 307 drives the vertical shaft 305 to rotate, thereby causing the second impeller 306 fixed on the outer wall of the vertical shaft 305 to rotate, and discharging the drawn water from the drain outlet 201. Furthermore, the vertical shaft 305 rotates synchronously under the support of the second fixed plate 304, which in turn drives the second impeller 306 fixed on its outer wall to rotate. The first impeller 301 rotates horizontally and the second impeller 306 rotates vertically, forming a "counter-rotation" motion state. After the fluid is pressurized and accelerated by the first impeller 301, it flows to the second impeller 306. The second impeller 306 further applies kinetic energy to the fluid, and finally the fluid is discharged from the vertical drain outlet 201, completing the fluid transportation process.

[0019] The first fixing plate 302 and the second fixing plate 304 provide stable support for the drive shaft 3 and the vertical shaft 305 through components such as the bearing body 303.

[0020] In a preferred embodiment, the shock-absorbing assembly includes a support shell 401 evenly distributed on the inner wall of a fixed ring 4. A shock-absorbing spring 402 is disposed inside the support shell 401. A damping rod 403 is disposed on the inner ring of the shock-absorbing spring 402. The damping rod 403 is fixedly connected to the support shell 401. A movable rod 404 is fixed to the other end of the shock-absorbing spring 402. The movable rod 404 is slidably connected to the inner wall of the support shell 401. An installation ring 405 is located at the other end of the movable rod 404 and is fixedly connected. Sliding rods 406 are evenly distributed on the side wall of the fixed ring 4. The installation ring 405 is slidably connected to the sliding rods 406. The detachable assembly includes a positioning rod 501 fixed to the side wall of an installation block 5. A filter support 502 is located on the outer wall of the positioning rod 501 and is slidably connected. A bolt 503 is disposed inside the filter support 502 and connected to the installation block 5.

[0021] Specifically, when water flows into the axial flow pump body 1 from the inlet 202, it first passes through the filter screen installed on the filter screen bracket 502. The filter screen filters and intercepts impurities and particles in the water flow to prevent them from entering the pump and damaging components such as the impeller. During the filtration process, the water flow will generate a certain impact force on the filter screen. At this time, the shock absorption component plays a role. The shock absorption spring 402 and the damping rod 403 in the support housing 401 work together. When the movable rod 404 is subjected to the impact force transmitted by the filter screen, the shock absorption spring 402 is compressed, and the damping rod 403 provides damping force to consume the impact energy, so that the movable rod 404 slides smoothly in the support housing 401. At the same time, the mounting ring 405 slides on the sliding rod 406, thereby reducing the impact on the filter screen and protecting the filter screen and the entire filtration component. When the filter needs to be replaced or cleaned after a period of use, it can be operated through the detachable component. The bolt 503 is unscrewed from the mounting block 5, and then the filter support 502 is slid along the positioning rod 501 to remove the filter support 502 from the mounting block 5, which facilitates the maintenance of the filter.

[0022] The main body of the motor mentioned above is model 24BLDC-30, which is existing technology and will not be elaborated on further.

[0023] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0024] During operation, the motor body 2 starts, driving the drive shaft 3 to rotate. On one hand, the first impeller 301 fixed on the drive shaft 3 rotates horizontally at the inlet 202, drawing in and initially pressurizing the fluid. On the other hand, the second bevel gear 308 on the drive shaft 3 meshes with the first bevel gear 307 at the lower end of the vertical shaft 305, driving the vertical shaft 305 to rotate vertically under the support of the second fixed plate 304, and driving the second impeller 306 on it to rotate in the opposite direction, forming a "counter-rotation" to perform secondary pressurization and rectification of the fluid, and finally discharge it at high speed from the drain outlet 201. The first fixed plate 302 and the bearing body 303 provide stable support for the drive shaft 3. Before the water flows in, it is filtered by the filter screen bracket 502. The impact it receives is buffered by the shock absorption assembly: the movable rod 404 transmits the force to the shock absorption spring 402 and the damping support rod 403. The mounting ring 405 slides along the slide rod 406 to consume vibration energy. During maintenance, the filter screen bracket 502 can be slid out from the mounting block 5 along the positioning rod 501 by unscrewing the bolt 503, which is convenient for cleaning or replacement.

[0025] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A built-in counter-rotating small-flow axial flow pump, comprising an axial flow pump body (1), characterized in that: The axial flow pump body (1) is provided with an installation mechanism for the operation of the axial flow pump, the installation mechanism including: The impeller assembly includes an inlet (202) horizontally disposed inside an axial flow pump body (1), a drain outlet (201) vertically disposed on the axial flow pump body (1), a first fixing plate (302) fixed to the inner wall of the inlet (202), a bearing body (303) disposed inside the first fixing plate (302), a drive shaft (3) connected inside the bearing body (303), a first impeller (301) fixed to the outer wall of the drive shaft (3), a second fixing plate (304) fixed to the inner wall of the drain outlet (201), a vertical shaft (305) disposed inside the second fixing plate (304), and a second impeller (306) fixed to the outer wall of the vertical shaft (305). The filter assembly includes a fixing ring (4) fixed to the inner wall of the inlet (202), and an installation ring (405) connected by a shock-absorbing component is provided on the inner wall of the fixing ring (4). An installation block (5) is uniformly fixed on the inner wall of the installation ring (405), and a filter screen bracket (502) connected by a detachable component is provided inside the installation block (5).

2. The built-in counter-rotating small-flow axial flow pump according to claim 1, characterized in that: One end of the axial flow pump body (1) is provided with a motor body (2) for driving, and the drive shaft (3) is connected to the output end of the motor body (2).

3. The built-in counter-rotating small-flow axial flow pump according to claim 1, characterized in that: The outer wall of the drive shaft (3) is fixed with a second bevel gear (308), and the lower end of the vertical shaft (305) is fixed with a first bevel gear (307) that meshes with the second bevel gear (308).

4. The built-in counter-rotating small-flow axial flow pump according to claim 1, characterized in that: The shock absorption assembly includes a support shell (401) evenly distributed on the inner wall of a fixed ring (4). A shock absorption spring (402) is provided inside the support shell (401). A damping rod (403) is provided on the inner ring of the shock absorption spring (402). The damping rod (403) is fixedly connected to the support shell (401). A movable rod (404) is fixed to the other end of the shock absorption spring (402). The movable rod (404) is slidably connected to the inner wall of the support shell (401). The mounting ring (405) is located at the other end of the movable rod (404) and is fixedly connected.

5. A built-in counter-rotating small-flow axial flow pump according to claim 1, characterized in that: The sidewall of the fixing ring (4) is evenly distributed with sliding rods (406), and the mounting ring (405) is slidably connected to the sliding rods (406).

6. A built-in counter-rotating small-flow axial flow pump according to claim 1, characterized in that: The detachable component includes a mounting block (5) with a positioning rod (501) fixed to its side wall. The filter support (502) is located on the outer wall of the positioning rod (501) and is slidably connected. The filter support (502) is provided with bolts (503) inside and connected to the mounting block (5).

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