Water pump and water pump assembly

Abstract

The utility model discloses a water pump, comprising a motor, the motor comprising a mounting seat, a stator core mounted on the mounting seat, a coil winding wound on the stator core and a rotating shaft, the stator core is annular, the mounting seat is provided with a closed chamber matching the stator core, the stator core wound with the coil winding is located in the closed chamber, the outer peripheral surface of the stator core is provided with a through groove along the axial direction, and the closed chamber is filled with insulating oil; the rotating shaft is mounted on the mounting seat through a bearing, and the rotating shaft and the stator core are coaxially distributed. It also comprises a shell mounted on the mounting seat, an impeller mounted on the output end of the rotating shaft and a pump casing fixed to the bottom of the mounting seat; an interlayer chamber is formed between the shell and the mounting seat, and the interlayer chamber is respectively connected to the water-lubricated bearing and the heat dissipation through hole; the shell is respectively provided with a water cooling inlet and a water cooling outlet communicating with the interlayer chamber; the pump casing and the bottom of the mounting seat enclose a water pumping channel, and the pump casing is provided with a water pumping inlet and a water pumping outlet communicating with the water pumping channel. And on this basis, the water pump and the water pump group can improve the heat dissipation efficiency of the stator.

Description

Technical Field

[0001] The utility model relates to the field of motor drive equipment, in particular to a motor, a water pump and a water pump group. Background Art

[0002] The motor is mainly composed of a stator and a rotor. The stator is the stationary part of the motor, and its main function is to generate a magnetic field. It is usually composed of a stator core, a stator winding and a mounting seat. The stator core is stacked by the stator core to reduce iron loss. The stator winding is the armature winding, which is responsible for generating a rotating magnetic field, also known as a coil winding; the rotor is the rotating part of the motor, and its main function is to rotate in the magnetic field to achieve energy conversion. In order to avoid the influence of the external environment on the stator core and the coil winding, epoxy resin encapsulation and curing are generally used to achieve the isolation of the stator core and the stator winding from the outside world. For example, application number 202010302132.5 discloses a method for improving the high-pressure resistance of a shielded pump. By injecting epoxy resin insulating glue into the stator sealing wall and curing it, the stator is insulated and sealed from the outside world. However, the thermal conductivity of the cured epoxy resin is poor, and the heat dissipation of the stator (especially the coil winding) basically depends on the heat transfer of the epoxy resin. Therefore, there is an urgent need for a motor with better stator heat dissipation effect. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, the utility model aims to provide a motor with better stator heat dissipation effect.

[0004] The purpose of the utility model is achieved by the following technical solutions:

[0005] A motor comprises a mounting seat, a stator core mounted on the mounting seat, a coil winding wound on the stator core and a rotating shaft, wherein the stator core is annular, the mounting seat is provided with a closed chamber matching the stator core, the stator core wound with the coil winding is located in the closed chamber, the outer peripheral surface of the stator core is provided with a through groove along the axial direction, and the closed chamber is filled with insulating oil; the rotating shaft is mounted on the mounting seat through a bearing, and the rotating shaft and the stator core are coaxially distributed.

[0006] Preferably, a closed door is provided on the mounting seat, and the closed door is used to control the conduction or closure of the closed chamber with the outside world.

[0007] Preferably, the rotating shaft is mounted on the mounting seat via a water-lubricated bearing.

[0008] Preferably, the shaft is provided with heat dissipation holes along the central axis direction.

[0009] The utility model also provides a water pump, comprising the motor mentioned in the utility model, and also comprising an outer shell mounted on a mounting seat, an impeller mounted on the output end of a rotating shaft and a pump casing fixed to the bottom of the mounting seat; a sandwich chamber is formed between the outer shell and the mounting seat, and the sandwich chamber is respectively connected to a water-lubricated bearing and a heat dissipation through hole; a water cooling inlet and a water cooling outlet communicating with the sandwich chamber are respectively provided on the outer shell; the pump casing and the bottom of the mounting seat enclose a water pumping channel, and a water pumping inlet and a water pumping outlet communicating with the water pumping channel are opened on the pump casing.

[0010] Preferably, it also includes a guide plate arranged on the inner wall of the interlayer chamber, the guide plate and the inner wall of the interlayer chamber enclose a guide channel, and the two ends of the guide channel correspond to the water cooling inlet and the water cooling outlet respectively.

[0011] Preferably, the water cooling outlet is connected to the corresponding water pumping inlet pipe, and the water cooling inlet is connected to the corresponding water pumping outlet pipe.

[0012] Preferably, it also includes a circuit board and a protective cover arranged on the outer surface of the shell, the protective cover and the shell enclose an electrical chamber, and the circuit board is located in the electrical chamber.

[0013] The utility model also provides a water pump set, which comprises at least two water pumps, and two adjacent water pumping channels are communicated.

[0014] Preferably, between two adjacent water pumps, a water cooling outlet of one water pump is connected to a water cooling inlet of another water pump through a pipeline.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model realizes insulation and sealing of the stator core and the coil winding by injecting insulating oil in the sealed chamber. When the motor is started, due to the uneven distribution of internal temperature and the characteristic that the density of the insulating oil itself changes greatly due to the influence of temperature, the insulating oil in the sealed chamber is in a state of slow flow. The insulating oil with a higher temperature is enriched in the upper layer, and after heat transfer occurs with the outer wall of the sealed chamber, it is cooled and sinks to the lower layer of the insulating oil through the through groove, thereby improving the efficiency of heat transfer to the outside around the stator core and the coil winding in the sealed chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the cross-sectional structure of the motor of Example 1.

[0018] Figure 2 Schematic diagram of the stator core structure of Example 1

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the water pump in Example 2.

[0020] Figure 4 This is a schematic diagram of the structure of the water pump group of Example 2.

[0021] In the figure: 10, mounting seat; 20, stator core 0; 201, through slot; 30, rotating shaft; 301, heat dissipation hole; 40, water-lubricated bearing; 50, housing; 501, water cooling inlet; 502, water cooling outlet; 60, impeller; 70, pump housing; 701, water pumping inlet; 702, water pumping outlet; 80, circuit board; 90, protective cover. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention are described in detail below, and examples of the specific embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and 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 therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] The stator structure, its working principle and the driving principle of the rotating shaft 30 are prior art and will not be described in detail here.

[0026] The rotating shaft 30 can be coaxially installed on the rotor. When the rotor is cylindrical, it can be regarded as the rotating shaft 30. In the present invention, no strict distinction is made, and the rotor and the rotating shaft 30 can be regarded as an integrated structure.

[0027] The power supply method of the coil winding of this patent is the prior art.

[0028] Example 1

[0029] Due to the installation method of the stator core 20 and the coil winding, the present invention does not improve the installation structure, and the coil winding is omitted for ease of display. Figure 1 and Figure 2 As shown, this embodiment provides a motor, including a mounting seat 10, a stator core 20 mounted on the mounting seat 10, a coil winding wound on the stator core 20 and a rotating shaft 30, the stator core 20 is annular, the mounting seat 10 is provided with a closed chamber matching the stator core 20, the stator core 20 with the coil winding wound is located in the closed chamber, the outer peripheral surface of the stator core 20 is provided with a through groove 201 along the axial direction, and the closed chamber is filled with insulating oil; the rotating shaft 30 is mounted on the mounting seat 10 through a bearing, and the rotating shaft 30 is coaxially distributed with the stator core 20. A closed door is provided on the mounting seat 10, and the closed door is used to control the conduction or closure of the closed chamber with the outside.

[0030] When the motor is started, the coil winding on the stator core 20 generates a magnetic field to drive the shaft 30 to rotate. The shaft 30 generates heat during rotation, and the coil winding also generates heat. The closer to the inner circle of the sealed chamber, the higher the temperature. The insulating oil in the higher temperature part expands more due to heat, has a lower density, and moves upward. Since the outer wall of the sealed chamber is in direct contact with the ambient temperature liquid, the temperature is relatively low and it is the main heat dissipation channel. Therefore, the insulating oil with a higher temperature in the upper layer exchanges heat with the outer wall of the sealed chamber, and the temperature is reduced, the density increases and sinks. The through groove 201 and the inner wall of the sealed chamber form a flow channel, and the insulating oil with reduced temperature flows from the higher end of the flow channel to the lower end. That is, due to the uneven distribution of the internal temperature and the fact that the density of the insulating oil itself changes greatly due to the influence of temperature, the insulating oil in the sealed chamber is in a state of slow flow. The insulating oil with a higher temperature is enriched in the upper layer, undergoes heat transfer with the outer wall of the sealed chamber, and then cools down through the through groove 201 and sinks to the lower layer of the insulating oil, thereby improving the efficiency of heat transfer from the inside of the sealed chamber to the outside.

[0031] To facilitate heat dissipation of the rotating shaft 30, the rotating shaft 30 is mounted on the mounting seat 10 through a water-lubricated bearing 40. The water-lubricated bearing 40 is used to dissipate heat from the contact surface between the water-lubricated bearing 40 and the rotating shaft 30 while the rotating shaft 30 is mounted on the mounting seat 10.

[0032] Since the high-speed rotating shaft 30 generates a lot of heat, a heat dissipation through hole 301 is opened along the central axis direction of the rotating shaft 30. Water from the outside flows through the heat dissipation through hole 301 to dissipate heat from the entire rotating shaft 30.

[0033] Example 2

[0034] like Figure 3 and 4 As shown, this embodiment provides a water pump, comprising the motor of embodiment 1, and further comprising a housing 50 mounted on the mounting seat 10, an impeller 60 mounted on the output end of the rotating shaft 30, and a pump housing 70 fixed to the bottom of the mounting seat 10; a sandwich chamber is formed between the housing 50 and the mounting seat 10, and the sandwich chamber is respectively connected to the water-lubricated bearing 40 and the heat dissipation through hole 301; a water cooling inlet 501 and a water cooling outlet 502 communicating with the sandwich chamber are respectively provided on the housing 50; the pump housing 70 and the bottom of the mounting seat 10 enclose a water pumping channel, and a water pumping inlet 701 and a water pumping outlet 702 communicating with the water pumping channel are opened on the pump housing 70. The water cooling outlet 502 is connected to the corresponding water pumping inlet 701 by a pipeline, and the water cooling inlet is connected to the corresponding water pumping outlet 702 by a pipeline.

[0035] The motor starts, and the rotating shaft 30 drives the impeller 60 to draw water from the water pumping inlet 701. After passing through the water pumping channel, water is pressurized and flows out from the water pumping outlet 702. Since the water pressure near the water pumping outlet 702 is higher and the water pressure near the water pumping inlet 701 is lower, part of the water enters the interlayer chamber through the water cooling inlet 501 to cool the water-lubricated bearing 40 and the rotating shaft 30. The pressure difference between the water pumping outlet 702 and the water pumping inlet 701 produces a Venturi jet-like phenomenon, and a small amount of water is continuously sucked into the interlayer chamber and discharged through the water cooling outlet 502.

[0036] In order to make the water in the interlayer chamber flow in a directional manner, a guide plate is also provided on the inner wall of the interlayer chamber. The guide plate and the inner wall of the interlayer chamber enclose a guide channel, and the two ends of the guide channel correspond to the water cooling inlet 501 and the water cooling outlet 502. The water in the interlayer chamber flows in a directional manner through the guide plate. The water that first enters the interlayer chamber has a long heat exchange time and a higher temperature. The closer the water is to the water cooling outlet 502, the higher the temperature is. It can ensure that the water with a higher temperature can be discharged in time, thereby improving the cooling efficiency of the motor.

[0037] The circuit board 80 and the protective cover 90 are arranged on the outer surface of the housing 50. The protective cover 90 and the housing 50 enclose an electrical chamber, and the circuit board 80 is located in the electrical chamber. The structure and power supply method of the circuit board 80 are the existing technology. The circuit board 80 is installed independently to avoid interference with the motor magnetic field.

[0038] like Figure 4 As shown, this embodiment provides a water pump group, including two water pumps, and two adjacent water pumping channels are connected. Between the two adjacent water pumps, the water cooling outlet 502 of one water pump is connected to the water cooling inlet 501 of the other water pump through a pipeline.

[0039] The water pump group of this embodiment can realize series connection between water pumps to increase the head, and can also realize parallel connection between water pumps to increase the flow rate.

[0040] The above-mentioned embodiments are only some preferred embodiments of the present invention, and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A water pump, characterized in that: The invention comprises a motor, wherein the motor comprises a mounting seat, a stator core mounted on the mounting seat, a coil winding wound on the stator core and a rotating shaft, wherein the stator core is annular, the mounting seat is provided with a closed chamber matching the stator core, the stator core wound with the coil winding is located in the closed chamber, the outer peripheral surface of the stator core is provided with a through groove along the axial direction, and the closed chamber is filled with insulating oil; the rotating shaft is mounted on the mounting seat through a bearing, and the rotating shaft is coaxially distributed with the stator core; a closed door is provided on the mounting seat, and the closed door is used to control the conduction between the closed chamber and the outside Or closed; the rotating shaft is installed on the mounting seat through a water-lubricated bearing; the rotating shaft is provided with heat dissipation holes along the central axis direction; it also includes a shell installed on the mounting seat, an impeller installed on the output end of the rotating shaft and a pump casing fixed to the bottom of the mounting seat; a sandwich chamber is formed between the shell and the mounting seat, and the sandwich chamber is respectively connected to the water-lubricated bearing and the heat dissipation through hole; the shell is respectively provided with a water cooling inlet and a water cooling outlet connected to the sandwich chamber; the pump casing and the bottom of the mounting seat enclose a water pumping channel, and the pump casing is provided with a water pumping inlet and a water pumping outlet connected to the water pumping channel.

2. The water pump according to claim 1, characterized in that: It also includes a guide plate arranged on the inner wall of the interlayer chamber, the guide plate and the inner wall of the interlayer chamber enclose a guide channel, and the two ends of the guide channel correspond to the water cooling inlet and the water cooling outlet respectively.

3. The water pump according to claim 2, characterized in that: The water cooling outlet is connected to the corresponding water pumping inlet pipe.

4. The water pump according to claim 3, characterized in that: It also includes a circuit board and a protective cover arranged on the outer surface of the shell. The protective cover and the shell enclose an electrical chamber, and the circuit board is located in the electrical chamber.

5. A water pump assembly comprising the water pump according to claim 4, characterized in that: It comprises at least two water pumps, and two adjacent water pumping channels are communicated with each other.

6. The water pump assembly according to claim 5, characterized in that: Between two adjacent water pumps, the water cooling outlet of one water pump is connected to the water cooling inlet of the other water pump through a pipeline.

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