A wall-mounted silent magnetic pump

Abstract

The utility model provides a wall-mounted silent magnetic pump, which relates to the technical field of aquarium water pumps, and solves the problem in the prior art that the driving motor needs to be sealed and the wire needs to be immersed in water. The device includes an inner wall pump body and an outer wall support shell, a fixing column is provided on the upper part of the outer wall support shell, and a fixing hole is provided on the upper part of the inner wall pump body. After the fixing column is inserted into the fixing hole, the inner wall pump body and the outer wall support shell can be connected and hung on both sides of a non-magnetic material plane (glass, plastic, etc.). When the motor drives the external magnetic rotor to rotate through the output shaft, it also drives the impeller to rotate synchronously, and non-contact transmission is achieved only by relying on magnetic torque. Water is sucked in from the water inlet and flows out from the water outlet at an accelerated speed under the centrifugal action of the rotating blades.

Description

Technical Field

[0001] The utility model relates to the technical field of aquarium water pumps, in particular to a wall-mounted silent magnetic pump. Background Art

[0002] Magnetic pump, also known as magnetic drive pump, is a new type of sealless pump that uses the principle of permanent magnetic transmission to achieve contactless transmission of torque. There is no mechanical connection between the driving shaft and the driven shaft, and no dynamic seal is required in the structure. Aquariums are containers specially used to raise ornamental aquatic plants and animals. They are animal breeding areas and usually have at least one side made of transparent glass and high-strength plastic. Usually, aquariums need to be equipped with water pumps to increase the amount of dissolved oxygen in the water, and at the same time, they need to be equipped with additional suction and filtration devices to remove impurities, dirt, and harmful substances produced by biological metabolism in the water to keep the water fresh and stable.

[0003] However, traditional aquarium water pumps are mostly in the form of submersible pumps, which require the water pump and the motor to be completely immersed in the water body, so there are great requirements for the waterproof performance of the water pump. Common submersible pumps on the market are mostly driven by DC brushless motors or AC motors, and the connection parts of the water pump are wrapped with glue filling technology. This also means that once the motor or motor sensor fails, it can only be replaced as a whole and cannot be repaired. At the same time, the motor is connected to the external power supply through a wire that is partially immersed in water. Once the line or connector is aged and damaged or damaged by animals biting or friction, it will cause serious leakage accidents. If it is an AC water pump connected to a household 220V AC power, leakage is more likely to endanger the user's life safety. Summary of the invention

[0004] The technical problem to be solved by the utility model is: how to design a brand-new magnetic pump, which is placed on the side wall of the aquarium in a wall-mounted manner, so that only part of the pump body is immersed in water, and the power drive device is placed outside the aquarium, so as to solve the problem that the drive motor needs to be sealed and the wire needs to be immersed in water. The technical solution of the utility model is implemented as follows: a wall-mounted silent magnetic pump comprises an inner wall pump body and an outer wall support shell, a fixing column is arranged on the upper part of the outer wall support shell, and a fixing hole is arranged on the upper part of the inner wall pump body. After the fixing column is inserted into the fixing hole, the inner wall pump body and the outer wall support shell can be connected and hung on both sides of a non-magnetic material plane (glass, plastic, etc.). A central axis is arranged on the inner wall pump body, and a central axis gasket and a sliding sleeve are fixedly installed on the central axis. The impeller is installed in the sliding sleeve in a rotating connection manner through the impeller shaft hole. The outer ring of the pump shell is provided with a fixing slot, and the connection is made by buckling the fastening buckle arranged in the inner wall pump body into the corresponding fixing slot in the pump shell. A sealing ring is provided on the connecting side of the inner wall pump body and the pump shell. The outer wall support shell is provided with a motor fixing plate, and the motor fixing plate is provided with fixing screw holes, and the drive motor is installed on the outside of the motor fixing plate by screw fastening. The external magnetic rotor is slidably connected to the motor drive shaft through the provided transmission shaft hole. Furthermore, blades are provided on the impeller, and impeller magnetic sheet grooves are provided in the gaps between the blades, and axially magnetized neodymium iron boron magnetic sheets with opposite polarities are placed in adjacent magnetic sheet grooves. Furthermore, a central shaft thrust groove is provided at the top of the central shaft of the inner wall pump body, and a thrust spring can be installed to prevent axial displacement of the impeller due to excessive rotation speed. Furthermore, the sliding sleeve is made of polyetheretherketone material, which has the characteristics of wear resistance, self-lubrication and low friction noise. Furthermore, the central shaft gasket is made of nylon material to offset the axial pulling force brought by the external magnetic rotor to the impeller. Furthermore, the external magnetic rotor is provided with the same number of external magnetic rotor magnetic sheet slots as the impeller, and axially magnetized NdFeB magnetic sheets with opposite polarities are placed in adjacent magnetic sheet slots. Furthermore, the external magnetic rotor is provided with an external magnetic rotor thrust groove, which cooperates with a C-shaped retaining spring to prevent the external magnetic rotor from being axially displaced by the magnetic force of the impeller.

[0005] The beneficial effects of the utility model are as follows: the wall-mounted silent magnetic pump involved in the utility model adopts a split design for the pump body and the power assembly. When in use, the pump body is immersed in the water body, and the motor in the power assembly is independently arranged outside the water body, and there is no need to perform waterproof treatment on the motor, which simplifies the structural design of the pump body, which is conducive to reducing costs and improving safety; the magnetic pump can be conveniently wall-mounted by using the fixing holes on the inner and outer walls and the outer magnetic rotor attracted by magnetic force and the inner magnetic sheet installed in the impeller. The rotating impeller inside the pump body is installed on a sliding sleeve made of polyetheretherketone (PEEK), which can effectively utilize the self-lubrication, high wear resistance and low friction noise characteristics of the material to achieve silent operation. In addition, the NdFeB magnetic sheets arranged alternately in polarity on the external magnetic rotor and the same number of magnetic sheets installed on the impeller are attracted to each other by opposite polarities. When the motor drives the external magnetic rotor to rotate through the output shaft, it will also drive the impeller to rotate synchronously. Water is sucked in from the water inlet and accelerated to flow out from the water outlet under the centrifugal action of the rotating blades. Since the magnetic pump only relies on magnetic torque to achieve contactless transmission, even if the impeller is stuck due to foreign objects, it will not cause damage to the motor, thereby improving the safety of the equipment and extending its service life. The design of the external power component is also convenient. For the maintenance and replacement of the motor, a more universal and inexpensive brushed motor can be used instead of a traditional brushless DC motor or AC motor, which greatly reduces the production cost. Compared with traditional magnetic pumps, the magnetic plate grooves are set on the impeller to effectively integrate the inner magnetic rotor with the impeller, thereby improving its transmission efficiency. At the same time, the impeller shaft hole set on the impeller also avoids the installation of additional sleeves, reducing the use of production materials. It is in direct contact with the sliding bearing, reducing the overall structural space volume of the magnetic pump, making the structure compact, so as to simplify the internal structure of the magnetic pump and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0007] FIG1 is a schematic diagram of the structure of a wall-mounted silent magnetic pump provided in an embodiment of the present utility model; FIG2 is an exploded view of a wall-mounted silent magnetic pump provided in an embodiment of the present utility model; FIG3 is a side cross-sectional view of a wall-mounted silent magnetic pump provided in an embodiment of the present utility model;

[0008] In the figure: 1-impeller, 2-pump casing, 3-inner wall pump body, 4-external magnetic rotor, 5-outer wall support shell, 6-center shaft gasket, 7-sliding sleeve, 11-impeller shaft hole, 12-blade, 13-impeller magnetic sheet slot, 21-fixing slot, 22-water outlet, 23-water inlet, 31-fixing hole, 32-sealing ring, 33-fastening buckle, 34-center shaft, 35-center shaft thrust slot, 41-transmission shaft hole, 42-external magnetic rotor magnetic sheet slot, 43-external magnetic rotor thrust slot, 51-fixing column, 52-motor fixing plate, 53-fixing screw hole. DETAILED DESCRIPTION

[0009] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0010] In the description of the present utility model, it should be noted that, unless otherwise specified, the meaning of "multiple" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0011] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0012] In order to make the technical personnel in this field better understand the present invention, the present invention is further described in detail below in combination with the accompanying drawings and specific implementation methods. As shown in Figures 1 and 2, Figure 1 is a schematic diagram of the structure of the magnetic pump in the embodiment of the present application; Figure 2 is an exploded view of Figure 1.

[0013] The magnetic pump in this embodiment comprises an inner wall pump body (3) and an outer wall support shell (5), which can be hung on both sides of a vertical plane of a non-magnetic material (glass, plastic, etc.) after being connected with a fixing hole (31) and a fixing column (51) respectively arranged on the upper part thereof, to realize a wall-mounted structure.

[0014] As shown in FIG. 2 , the pump housing (2), the impeller (1), the sliding sleeve (7), the central shaft gasket (6) and the inner wall pump body (3) are axially assembled together along the central shaft (34) provided on the inner wall pump body (3). Specifically, the central shaft gasket (6) is first placed on the bottom of the central shaft (34). The central shaft gasket (6) uses a high-strength, self-lubricating and wear-resistant nylon (PA66) material to bear the axial tension caused by the mutual attraction of the magnetic pieces, reduce the friction resistance caused by the impeller when rotating, and also reduce the friction noise. The sliding sleeve (7) uses a polyetheretherketone material. The polyetheretherketone material has a smooth surface and has good wear resistance, self-lubricating and low friction noise characteristics. When the impeller rotates at 2000 rpm in water, the noise is less than 40 decibels (dB). The sliding sleeve (7) and the central shaft (34) are fitted with an interference fit. The impeller (1) is integrally processed using engineering plastic (ABS), and a blade (12) is provided on the impeller (1). An impeller magnetic sheet slot (13) is provided in the gap between the blades (12), and axially magnetized NdFeB magnetic sheets with opposite polarities are placed in adjacent magnetic sheet slots. The impeller (1) is gap-matched with the sliding sleeve (7) through the impeller shaft hole (11), and a hydraulic water-lubricated bearing is formed by utilizing the small gap between the two and the liquid medium such as water in the pump. Compared with ball bearings, hydraulic water-lubricated bearings can make rotation smoother and less noisy. For the convenience of installation, a sealing ring (32) and a fastening buckle (33) are provided on the inner wall of the pump body (3). During assembly, the pump housing (2) needs to be embedded in the sealing ring (32) while pressing the fastening buckle (33) into the corresponding fixed slot (21). At the same time, the sealing ring (32) also plays a sealing role, thereby increasing the pressure in the pump chamber, thereby improving the working efficiency of the magnetic pump. The outer wall support shell (5) is provided with a motor fixing plate (52), and an external driving device (such as a motor, etc.) is installed on its outer side through a fixing screw hole (53), and the external driving shaft is connected to the external magnetic rotor (4) in the form of interference fit through a transmission shaft hole (41). It should be noted that the external magnetic rotor (4) is transmitted with the external driving device, and the external driving device is a motor, etc., but it is not limited to this, and other components with the same function can be used in this case. The external magnetic rotor (4) is provided with the same number of magnetic plate slots as the impeller, and axial magnetized magnetic plates with opposite polarities are placed in adjacent magnetic plate slots. Different from placing all magnetic plates with the same polarity, the method in this example can effectively improve the magnetic coupling state, so that the impeller (1) runs more smoothly. At the same time, the wall-mounted structure formed by the fixing hole (31) and the fixing column (51) can accurately align the transmission shaft with the internal impeller axis without contact, thereby improving the transmission efficiency and the stability of operation. A central shaft thrust groove (35) is provided at the top end of the central shaft (34) of the inner wall pump body (3), and a thrust spring can be installed to prevent the impeller from axial displacement due to excessive rotation speed.The external magnetic rotor (4) is provided with the same number of external magnetic rotor magnetic sheet slots (42) as that in the impeller, and axially magnetized NdFeB magnetic sheets with opposite polarities are placed in adjacent magnetic sheet slots. The external magnetic rotor (4) is provided with an external magnetic rotor thrust groove (43), which cooperates with a C-shaped retaining spring to prevent the external magnetic rotor (4) from being axially displaced by the magnetic force of the impeller (1).

[0015] How it works

[0016] Before the wall-mounted silent magnetic pump provided by the embodiment of the utility model works, it is necessary to connect the inner wall pump body (3) and the outer wall support shell (5) with the fixing column (51) through the fixing hole (31). Combined with the impeller (1) containing the permanent magnetic disk and the outer magnetic rotor (4) installed below, an axially aligned "J"-shaped structure can be constructed based on the principle of mutual attraction of opposite magnetic poles. This structure can be stably installed on both sides of the non-magnetic material plane (the side wall of the aquarium in this example). In this example, the permanent magnetic disk is made of neodymium iron boron material, which has an extremely high magnetic field strength and can meet the requirements of non-contact long-distance power transmission. During operation, the external drive device (usually a motor) drives the magnetic pump's outer magnetic rotor (4) to rotate, and the impeller (1) rotates synchronously through magnetic coupling. The impeller (1) is provided with blades (12). When the pump chamber is filled with water, the blades (12) rotate, causing the corresponding water to be thrown out from the water outlet (22) of the pump housing (2) under the action of centrifugal force. The corresponding blade root near the impeller shaft hole (11) generates low pressure, and more water flows in from the water inlet (23). Such continuous operation accelerates the water circulation in the aquarium and improves the water quality. The impeller (1) is provided with blades (12), and the gap between the blades (12) is provided with impeller magnetic sheet grooves (13), and axially magnetized neodymium iron boron magnetic sheets with opposite polarities are placed in adjacent magnetic sheet grooves. The top of the central axis (34) of the inner wall pump body (3) is provided with a central axis thrust groove (35), and a thrust spring can be installed to prevent the impeller from axial displacement due to excessive rotation speed. The sliding sleeve (7) is made of polyetheretherketone material. The polyetheretherketone material has a smooth surface and has good wear resistance, self-lubrication and low friction noise. When the impeller rotates at 2000 revolutions per minute in water, the noise is less than 40 decibels (dB). The external magnetic rotor (4) is provided with the same number of external magnetic rotor magnetic sheet slots (42) as the impeller, and axially magnetized neodymium iron boron magnetic sheets with opposite polarities are placed in adjacent magnetic sheet slots. The external magnetic rotor (4) is provided with an external magnetic rotor thrust groove (43), which can prevent the external magnetic rotor (4) from being axially displaced by the magnetic force of the impeller (1) in combination with a C-type retaining spring.

[0017] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A wall-mounted silent magnetic pump, characterized in that: The magnetic pump comprises an inner wall pump body (3) and an outer wall support shell (5); a fixing column (51) is arranged on the upper part of the outer wall support shell (5); a fixing hole (31) is arranged on the upper part of the inner wall pump body (3); after the fixing column (51) is inserted into the fixing hole (31), the inner wall pump body (3) and the outer wall support shell (5) can be hung together on both sides of the glass material plane; a central axis (34) is arranged on the inner wall pump body (3); a central axis gasket (6) and a sliding shaft sleeve (7) are fixedly mounted on the central axis (34); an impeller (1) is mounted on the sliding shaft sleeve (11) in a rotatable connection manner through the impeller shaft hole (11). 7), the outer ring of the pump housing (2) is provided with a fixing groove (21), and the fixing connection is achieved by buckling the fastening buckle (33) provided in the inner wall pump body (3) into the corresponding fixing groove (21) in the pump housing (2), and a sealing ring (32) is provided on the connecting side of the inner wall pump body (3) and the pump housing (2), and the outer wall support shell (5) is provided with a motor fixing plate (52), and the motor fixing plate (52) is provided with a fixing screw hole (53), and the driving motor is mounted on the outer side of the motor fixing plate (52) by screw fastening, and the outer magnetic rotor (4) is slidably connected to the motor drive shaft through the provided drive shaft hole (41).

2. A wall-mounted silent magnetic pump according to claim 1, characterized in that: The impeller (1) is provided with blades (12), the gaps between the blades (12) are provided with impeller magnetic sheet slots (13), and axially magnetized neodymium iron boron magnetic sheets with opposite polarities are placed in adjacent magnetic sheet slots.

3. A wall-mounted silent magnetic pump according to claim 1, characterized in that: A central shaft thrust groove (35) is provided at the top end of the central shaft (34) of the inner wall pump body (3), and a thrust spring can be installed to prevent the impeller from axial displacement due to excessive rotation speed.

4. A wall-mounted silent magnetic pump according to claim 1, characterized in that: The sliding bushing (7) is made of polyetheretherketone.

5. A wall-mounted silent magnetic pump according to claim 1, characterized in that: The central shaft gasket (6) is made of nylon material and is used to offset the axial pulling force brought by the outer magnetic rotor (4) to the impeller (1).

6. A wall-mounted silent magnetic pump according to claim 1, characterized in that: The external magnetic rotor (4) is provided with the same number of external magnetic rotor magnetic sheet slots (42) as that in the impeller, and axially magnetized NdFeB magnetic sheets with opposite polarities are placed in adjacent magnetic sheet slots.

7. A wall-mounted silent magnetic pump according to claim 1, characterized in that: The external magnetic rotor (4) is provided with an external magnetic rotor thrust groove (43), which cooperates with a C-shaped retaining spring to prevent the external magnetic rotor (4) from being axially displaced by the magnetic force of the impeller (1).

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