A shaftless water pump

Abstract

This invention discloses a shaftless water pump, comprising: a housing, an outlet fixedly connected to the top of the housing, a support column fixedly connected to the bottom of the housing, and mounting columns fixedly connected to the inner wall of the housing; electromagnetic coils are provided around the motor stator; a groove A is provided above the tension plate; a groove B is provided on the outer side of the connecting plate; after the groove B engages with the mounting column, it is locked by bolt B and the bolt end, and then force is applied to drive the fixing terminal to be fixed inside the housing; the bolt B passes through the mounting hole of the housing; the tension plate and the connecting plate are used to fix the motor stator to the housing; during maintenance, the motor stator can be removed by removing bolt B; after maintenance, the fixing terminal between the connecting plate and the tension plate can be removed and reassembled, solving the technical problems of inconvenient disassembly and difficult replacement of parts of the water pump.

Description

Technical Field

[0001] This invention relates to the field of water pump technology, and more specifically, to a water pump without a drive shaft. Background Technology

[0002] Coal mine pumps are a common piece of equipment in mines. Their main principle is to use the mechanical motion of the pump to transport liquids or gases from low-pressure areas to high-pressure areas, thereby enabling the transport and discharge of substances such as water, mud, and oil in coal mines. The working principle of coal mine pumps involves multiple fields such as fluid mechanics and mechanical engineering.

[0003] First, the working principle of a coal mine pump can be summarized as the pressure difference principle. When the pump starts, a low-pressure area is formed inside the pump, and liquid or gas is drawn into the pump; subsequently, a high-pressure area is formed inside the pump, and the liquid or gas is discharged outside the pump. This process is achieved through the mechanical movement of the pump, usually through the rotation or reciprocating motion of components such as impellers, plungers, and screws.

[0004] Secondly, coal mine pumps also involve the principle of liquid or gas transportation. In coal mines, pumps are commonly used to transport substances such as water, slurry, and oil. During the pump's operation, these substances are drawn into the pump, and through the pump's mechanical action, are discharged outside, thus achieving the functions of transportation and discharge. This process requires consideration of factors such as the fluid's properties, viscosity, and density to ensure the normal operation of the pump and its transportation effectiveness.

[0005] Furthermore, the working principle of a coal mine pump is also related to its structure and operating environment. The pump's structure includes components such as the pump body, impeller, shaft, and seals; their design and assembly significantly impact the pump's performance and lifespan. The working environment in coal mines is typically harsh, requiring pumps to withstand high temperatures, high pressures, and corrosion. Therefore, the selection of materials and manufacturing processes are also crucial factors influencing the pump's operating principle.

[0006] In general, the working principle of a coal mine pump is based on fluid mechanics and mechanical motion. Through the mechanical action of the pump, it achieves the transportation and discharge of liquids or gases. In practical applications, it is necessary to comprehensively consider factors such as the pump's pressure difference principle, the liquid or gas transportation principle, as well as the pump's structure and working environment to ensure the normal operation of the pump and its transportation effect.

[0007] A search revealed that Chinese patent CN202010926950.2 discloses a shaftless submersible axial flow electric pump comprising: an inlet section, a submersible motor section, and a guide section; the lower end of the submersible motor section is connected to the inlet section by fastening bolts, and the upper end of the submersible motor section is connected to the guide section by fastening bolts; the guide section includes a guide body and guide vanes, the guide body being a frustoconical cylinder, with guide vanes cast integrally with it on the inner wall of the frustoconical cylinder; the inlet section at the bottom of the pump is a bell-shaped cylinder.

[0008] 1. In existing shafted water pumps, electric energy drives a motor, which in turn drives a central shaft, which in turn drives an impeller, which pumps water to the appropriate location. This process results in excessive energy consumption.

[0009] 2. Existing technologies suffer from the technical problems of inconvenient disassembly of water pumps and difficulty in replacing parts;

[0010] 3. In the existing technology, water pumps have the problem that the impeller is easily entangled by large particles or debris in the water, which can cause the impeller to jam and damage the motor. Summary of the Invention

[0011] (a) Technical problems to be solved

[0012] To address the problems existing in the prior art, the present invention provides a shaftless water pump to solve the technical problems mentioned in the background art, namely, that existing water pumps are driven by electric power to drive a motor, which in turn drives a central shaft, which in turn drives an impeller, which pumps water to the appropriate location, resulting in excessive energy consumption during the conversion process; and that the water pump is inconvenient to disassemble and difficult to replace parts.

[0013] (II) Technical Solution

[0014] To achieve the above objectives, the present invention provides the following technical solution: a shaftless water pump, comprising: a housing, an outlet fixedly connected to the upper part of the housing, a support column fixedly connected to the lower part of the housing, and mounting columns fixedly connected to the inner wall of the housing around the perimeter.

[0015] The housing contains a motor stator. The motor stator has diverging tension plates at its upper and lower ends. A fixing hole A is formed on the side of each tension plate, and a fixing hole B is formed at the center of the side of each tension plate. A fixing terminal is fitted inside fixing hole B, and a fixing terminal core is located within the fixing terminal. A bolt end is provided at the front end of the fixing terminal, and the fixing terminal itself has a perforated groove. A connecting plate is provided on the outer side of the tension plate. A through hole corresponding to fixing holes A and B is formed on the side of the connecting plate. The connecting plate is fixed to the side of the tension plate by bolts A passing through the through holes. Fixing hole B is a trapezoidal hollow column, and a fixing terminal is located within the trapezoidal hollow column. The bolt end of the fixing terminal is connected to bolt B.

[0016] The motor stator is provided with electromagnetic coils around its perimeter, and a groove A is provided above the tension plate; a groove B is provided on the outer side of the connecting plate. After the groove B engages with the mounting post, it is locked with the bolt B and the bolt end, and then force is applied to drive the fixing terminal to be fixed in the housing. The bolt B passes through the mounting hole of the housing.

[0017] When maintenance is required, the staff removes bolt B, then takes the motor stator and rotor out of the housing; after maintenance, bolt A is removed, the fixing terminal is removed and replaced, and then the motor is reinstalled.

[0018] The motor rotor is mechanically sealed to the outside of the motor stator. A strong magnetic plate is fixedly connected inside the motor rotor, and a helical impeller is fixedly connected to the outside of the motor rotor.

[0019] The invention is further configured such that a non-impact check valve is installed inside the outlet; and inlets are provided around the support column.

[0020] The present invention is further configured such that a shock-absorbing pad is provided between the tension plate and the connecting plate.

[0021] The present invention is further configured such that the spiral impeller is spiral in shape as a whole, and can be single spiral, double spiral or multi spiral; the spiral impeller shape is divided into constant pitch impeller and variable pitch impeller; the spiral impeller cross-sectional shape is divided into rectangular cross-section and trapezoidal cross-section.

[0022] The invention is further configured such that the support column can be replaced with a pipe of the same size, and a reamer is installed at the underwater end of the pipe.

[0023] The invention is further configured such that a reamer is fitted inside the support column.

[0024] (III) Beneficial Effects

[0025] Compared with the prior art, the present invention provides a shaftless water pump, which has the following advantages:

[0026] 1. By fixing the spiral impeller to the outside of the motor rotor, the motor stator generates a magnetic effect after being energized, which drives the motor rotor to rotate, thereby causing the spiral impeller to rotate and forming a shaftless water pump. Electrical energy is converted into magnetic energy, and magnetic energy is converted into mechanical energy, reducing the steps of transmitting the mechanical energy of the motor through the drive shaft in existing water pumps, and solving the technical problem of excessive energy consumption during the conversion process.

[0027] 2. By setting up tension plates and connecting plates to fix the motor stator into the housing, the motor stator can be removed by removing bolt B during maintenance. After maintenance, the fixed terminals between the connecting plate and tension plate can be removed before reassembly, which solves the technical problems of inconvenient disassembly of the water pump and difficulty in replacing parts.

[0028] 3. By opening a water inlet, the problem of large particles or debris entering the water pump and causing damage to the motor can be solved. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a shaftless water pump according to the present invention;

[0030] Figure 2 This is a cross-sectional view of the overall structure of a shaftless water pump according to the present invention;

[0031] Figure 3 This is a schematic diagram of the structure of the motor stator and motor rotor in this invention;

[0032] Figure 4 This is a cross-sectional view of the motor rotor in this invention;

[0033] Figure 5 This is one of the structural schematic diagrams of the motor stator in this invention;

[0034] Figure 6 This is one of the structural schematic diagrams of the motor stator in this invention;

[0035] Figure 7 This is one of the structural schematic diagrams of the motor stator in this invention;

[0036] Figure 8 This is a schematic diagram of the fixed terminal structure in this invention.

[0037] In the diagram: 1. Outer casing; 101. Outlet; 102. Support frame; 103. Terminal box; 104. Power cord; 105. Mounting hole; 106. Mounting post; 2. Motor stator; 201. Tension plate; 2011. Fixing hole A; 2012. Fixing hole B; 202. Connecting plate; 2021. Bolt A; 2022. Fixing terminal; 20221. Bolt end; 20222. Flower groove; 2023. Fixing terminal inner core; 2024. Bolt B; 203. Groove A; 204. Electromagnetic coil; 205. Groove B; 3. Motor rotor; 301. Spiral impeller; 302. Mechanical seal; 303. Strong magnetic plate. Detailed Implementation

[0038] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0040] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0041] Implementation of List 1:

[0042] Please see Figure 1-8 A shaftless water pump includes: a housing 1, an outlet 101 fixedly connected to the upper part of the housing 1, a support column 102 fixedly connected to the lower part of the housing 1, and mounting columns 106 fixedly connected to the inner wall of the housing 1 around the perimeter.

[0043] The housing 1 contains a motor stator 2. The motor stator 2 has diverging tension plates 201 at its upper and lower ends. The tension plates 201 have fixing holes A2011 on their sides and B2012 at their center. A fixing terminal 2022 is fitted inside the fixing hole B2012. A fixing terminal core 2023 is located inside the fixing terminal 2022. A bolt end 20221 is located at the front end of the fixing terminal 2022. The fixing terminal 2022 itself... A flower slot 20222 is provided; a connecting plate 202 is provided on the outer side of the tension plate 201, and a through hole corresponding to the fixing hole A2011 and the fixing hole B2012 is opened on the side of the connecting plate 202. The connecting plate 202 is fixed to the side of the tension plate 201 by bolt A2021 passing through the through hole; the fixing hole B2012 is a trapezoidal hollow column, and a fixing terminal 2022 is provided in the trapezoidal hollow column. The bolt end 20221 of the fixing terminal 2022 is connected to the bolt B2024.

[0044] Electromagnetic coils 204 are provided around the motor stator 2. A groove A203 is provided above the tension plate 201. The groove A203 is used to fix the circuit of the electromagnetic coil 204. A groove B205 is provided on the outer side of the connecting plate 202. After the groove B205 engages with the mounting post 106, it is locked with the bolt end 20221 by bolt B2024. After the bolt continues to apply force, it drives the fixing terminal 2022 to be fixed in the housing 1. The bolt B2024 passes through the mounting hole 105 of the housing 1.

[0045] When maintenance is required, the staff removes bolt B2024, takes out the motor stator 2 and motor rotor 3 from the outer casing 1; after maintenance, remove bolt A2021, take out the fixing terminal 2022 for replacement, and then install it.

[0046] The motor stator 2 is externally connected to the motor rotor 3 via a mechanical seal 302. The motor rotor 3 is internally fixedly connected to a strong magnetic plate 303, and the motor rotor 3 is externally fixedly connected to a spiral impeller 301.

[0047] A shock-absorbing pad is provided between the tension plate 201 and the connecting plate 202. The shock-absorbing pad is used to reduce the vibration of the motor rotor 3.

[0048] The spiral impeller 301 is spiral in shape, and can be single-spiral, double-spiral, or multi-spiral; the spiral impeller 301 shape is divided into constant pitch impeller and variable pitch impeller; the cross-sectional shape of the spiral impeller is divided into rectangular cross-section and trapezoidal cross-section.

[0049] The support column 102 can be replaced with a pipe of the same size, with a reamer installed at the underwater end of the pipe.

[0050] The support column 102 has a reamer installed inside.

[0051] Working principle:

[0052] After the shaftless water pump is delivered to the work site, the power cord 104 is connected and the power is turned on. The motor rotor starts to work, and the spiral impeller 301 starts to pump the water upward until the water is pumped to the corresponding position.

[0053] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. 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 variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A shaftless water pump, comprising: The outer shell (1) is characterized in that: a water outlet (101) is fixedly connected to the upper part of the outer shell (1), a support column (102) is fixedly connected to the lower part of the outer shell (1), and mounting columns (106) are fixedly connected to the inner wall of the outer shell (1) around its perimeter. The housing (1) contains a motor stator (2). The motor stator (2) has diverging tension plates (201) at its upper and lower ends. A fixing hole A (2011) is provided on the side of the tension plate (201), and a fixing hole B (2012) is provided at the center of the side of the tension plate (201). A fixing terminal (2022) is fitted inside the fixing hole B (2012). A fixing terminal core (2023) is provided inside the fixing terminal (2022). A bolt end (20221) is provided at the front end of the fixing terminal (2022). The tension plate (201) itself has a flower groove (20222); the outer side of the tension plate (201) is provided with a connecting plate (202), and the side of the connecting plate (202) is provided with through holes corresponding to fixing holes A (2011) and B (2012). The connecting plate (202) is fixed to the side of the tension plate (201) by bolt A (2021) through the through holes; the fixing hole B (2012) is a trapezoidal hollow column, and a fixing terminal (2022) is provided in the trapezoidal hollow column. The bolt end (20221) of the fixing terminal (2022) is connected to bolt B (2024); The motor stator (2) is provided with electromagnetic coils (204) around its perimeter. The tension plate (201) has a groove A (203) on its upper side. The connecting plate (202) has a groove B (205) on its outer side. After the groove B (205) engages with the mounting post (106), it is locked by bolt B (2024) and bolt end (20221). Then, force is applied to drive the fixing terminal (2022) to be fixed in the outer shell (1). The bolt B (2024) passes through the mounting hole (105) of the outer shell (1). When maintenance is required, the staff removes bolt B (2024), takes out the motor stator (2) and motor rotor (3) from the housing (1); after maintenance, remove bolt A (2021), take out the fixing terminal (2022) for replacement, and then install it. The motor stator (2) has a motor rotor (3) outside through a mechanical seal (302). A strong magnetic plate (303) is fixedly connected inside the motor rotor (3), and a spiral impeller (301) is fixedly connected outside the motor rotor (3).

2. A shaftless water pump according to claim 1, characterized in that: The outlet (101) is fitted with a non-impact check valve; the support column (102) has inlets around its perimeter.

3. A shaftless water pump according to claim 1, characterized in that: A shock-absorbing pad is provided between the tension plate (201) and the connecting plate (202).

4. A shaftless water pump according to claim 1, characterized in that: The spiral impeller (301) is spiral in shape and can be single spiral, double spiral or multi spiral; the shape of the spiral impeller (301) can be equal pitch impeller or variable pitch impeller; the cross-sectional shape of the spiral impeller can be rectangular cross-section or trapezoidal cross-section.

5. A shaftless water pump according to claim 1, characterized in that: The support column (102) can be replaced with a pipe of the same size, the underwater end of which is equipped with a reamer.

6. A shaftless water pump according to claim 5, characterized in that: The support column (102) is fitted with a reamer.

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