Stator assembly structure of brushless diaphragm booster pump

Abstract

The utility model discloses a stator assembly structure of a brushless diaphragm booster pump, which comprises a motor shell and a stator assembly, and the stator assembly comprises an iron core, a coil, an insulating plastic framework, a contact pin and a pcb adapter plate. The insulating plastic framework wraps the surface of the iron core, the coil is wound on the iron core, the ground end of the contact pin is fixedly connected with the pcb adapter plate, and the other end of the contact pin is inserted into the iron core and fixedly connected with the iron core; the stator assembly adopts a two-series and two-parallel winding mode; the winding of the iron core and the winding of the coil adopt a three-phase 12-slot distributed concentrated winding, and the characteristics of high efficiency, low noise, low vibration, small loss and good heat dissipation performance of the motor are realized through the cooperative arrangement of the motor shell and the stator assembly and the adoption of a two-series and two-parallel winding mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of motors, and more specifically relates to a stator assembly structure of a brushless diaphragm booster pump. Background Art

[0002] As an important component for fluid transportation, the brushless diaphragm booster pump plays an important role in many fields such as actual production and water treatment. In recent years, with the increasingly obvious trend of global high-efficiency energy conservation and environmental protection, the efficiency and energy-saving performance of the brushless diaphragm booster pump have been continuously improved. The two-series and two-parallel winding connection method has significantly improved in terms of thermal management, electromagnetic compatibility, and energy efficiency ratio compared to the four-series connection method of the motor stator winding used in traditional brushless diaphragm booster pumps; the overall performance of the brushless diaphragm booster pump has been improved.

[0003] Currently, in the design of the motor stator winding of traditional diaphragm booster pumps, the relatively common one is the four-series connection method, which has the following problems:

[0004] 1. The winding resistance value is relatively high and large, affecting the efficiency of the brushless diaphragm booster pump and generating a large amount of heat;

[0005] 2. The motor voltage utilization rate is low, and the motor phase current is relatively high;

[0006] 3. The outer diameter size of the motor is relatively large, affecting the installation of the overall machine structure;

[0007] Based on the above problems, the utility model proposes a stator assembly applied to a high-efficiency energy-saving brushless diaphragm booster pump, which can effectively solve the above problems. Content of the Utility Model

[0008] Aiming at the deficiencies of the prior art, the utility model provides a stator assembly structure of a brushless diaphragm booster pump. The stator core adopts a two-series and two-parallel winding method, which makes the full rate of the stator winding slot high, effectively reduces the heat loss during the operation of the motor, and makes the motor more efficient, with lower noise, smaller vibration, and better heat dissipation.

[0009] To achieve the above object, the utility model provides the following technical solution: A stator assembly structure of a brushless diaphragm booster pump, including,

[0010] A motor housing (1), the motor housing (1) includes a housing (11) and a support base (12), and the housing (11) is fixedly connected to the support base (12) by bolts;

[0011] Stator assembly (2), the stator assembly (2) includes an iron core (21), a coil (22), an insulating plastic skeleton (23), a pin (24) and a pcb adapter board (25). The insulating plastic skeleton (23) is wrapped on the surface of the iron core (21), the coil (22) is wound around the iron core (21), one end of the pin (24) is fixedly connected to the pcb adapter board (25), and the other end is inserted and fixed into the iron core (21);

[0012] The coil (22) forms a star connection in a two-series and two-parallel winding mode;

[0013] The winding of the iron core (21) and the coil (22) adopts a three-phase 12-slot distributed concentrated winding.

[0014] Further, the Ucom, Vcom and Wcom tails of the winding of the coil (22) are welded, the welding ends are wrapped with heat shrinkable tubes, and are placed in the slots of the iron core.

[0015] Further, the housing (11) is in interference fit with the iron core (21).

[0016] Further, the iron core (21) is formed by stacking a plurality of silicon steel sheets.

[0017] Further, the insulating plastic skeleton (23) is wrapped on the contact surface between the coil (22) and the iron core (21) by a plastic coating process.

[0018] Further, four mounting and positioning holes are provided on the support base (12).

[0019] Compared with the prior art, the beneficial effects of the present utility model are: a motor housing and a stator assembly, the stator assembly includes an iron core, a coil, an insulating plastic skeleton, a pin and a pcb adapter board; the insulating plastic skeleton is wrapped on the surface of the iron core, the coil is wound around the iron core, one end of the pin is fixedly connected to the pcb adapter board, and the other end is inserted into the iron core and fixedly connected to the iron core; the stator assembly adopts a two-series and two-parallel winding method; the winding of the iron core and the coil adopts a three-phase 12-slot distributed concentrated winding. Through the cooperative setting of the motor housing and the stator assembly, the two-series and two-parallel winding method makes the full rate of the stator winding slots high, effectively reducing the heat loss during the operation of the motor, making the motor more efficient, with lower noise, smaller vibration and better heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an exploded view of the stator assembly structure of the present utility model;

[0021] Figure 2 It is a pin position diagram of the stator assembly of the present utility model;

[0022] Figure 3It is the winding diagram of the coil winding of the present utility model;

[0023] Figure 4 It is the schematic diagram of the coil lead-out of the present utility model. Specific embodiments

[0024] In the description of the present utility model, it should be noted that for orientation terms, such as the terms "center", "horizontal (X)", "vertical (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is 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 should not be construed as limiting the specific protection scope of the present utility model.

[0025] In addition, such terms as "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0026] Refer to Figures 1 to 4 For further description of the present utility model.

[0027] A stator assembly structure of a brushless diaphragm booster pump includes

[0028] A motor housing 1, the motor housing 1 includes an outer shell 11 and a support base 12, and the outer shell 11 and the support base 12 are fixedly connected by bolts;

[0029] A stator assembly 2, the stator assembly 2 includes an iron core 21, a coil 22, an insulating plastic skeleton 23, a pin 24 and a pcb adapter board 25. The insulating plastic skeleton 23 is wrapped on the surface of the iron core 21, the coil 22 is wound around the iron core 21, one end of the pin 24 is fixedly connected to the pcb adapter board 25, and the other end is inserted into and fixed in the iron core 21;

[0030] The coil 22 is connected in a star shape in a two-series and two-parallel winding manner;

[0031] The winding of the iron core 21 and the coil 22 adopts a three-phase 12-slot distributed concentrated winding.

[0032] Such as Figures 1 to 4As shown, the coil 22 is distributed in the 12 slots of the iron core in a winding distribution mode of two series and two parallel.

[0033] As Figure 4 shown, the wire winds clockwise from slot 1 of the iron core 21 and then winds counterclockwise around slots 2 to U com to form a series coil. The wire winds counterclockwise from slot 7 and then winds clockwise around slots 8 to U com to form a series coil. The series coil formed by the wire winding from slot 1 to slot 2 and the series coil formed by the wire winding from slot 7 to slot 8 are connected in parallel at U in to form the U phase;

[0034] The wire winds counterclockwise from slot 3 and then winds clockwise around slots 4 to V com to form a series coil. The wire winds clockwise from slot 9 and then winds counterclockwise around slots 10 to V com to form a series coil. The series coil formed by the wire winding from slot 3 to slot 4 and the series coil formed by the wire winding from slot 9 to slot 10 are connected in parallel at V in to form the V phase;

[0035] The wire winds clockwise from slot 5 and then winds counterclockwise around slots 6 to W com to form a series coil. The wire winds counterclockwise from slot 11 and then winds clockwise around slots 12 to W com to form a series coil. The series coil formed by the wire winding from slot 6 to slot 7 and the series coil formed by the wire winding from slot 11 to slot 12 are connected in parallel at W in to form the W phase;

[0036] The winding mode of two series and two parallel greatly improves the magnetic full rate of the stator, thereby improving the working efficiency of the brushless diaphragm booster pump.

[0037] Specifically, in the star connection mode of two series and two parallel, since each phase winding is composed of two groups of series windings connected in parallel, the phase resistance is 1 / 2 of the resistance of a single winding. The calculation of the wire resistance needs to consider the influence of the parallel windings and is usually less than the resistance of a single winding. While in the traditional star connection mode of four series, since each phase winding is composed of four groups of series windings, the phase resistance is 4 times the resistance of a single winding. The wire resistance is also affected by the series windings and is usually higher than the wire resistance in the two series and two parallel connection mode. Therefore, the phase resistance of the two series and two parallel connection mode is smaller, which helps to reduce the heat loss during the operation of the motor and improve the efficiency.

[0038] Preferably in this embodiment, the pin 24 is a 1 mm square pin. The pin 24 is fixedly connected with the positioning hole left on the insulating plastic skeleton 23 by interference fit, so that U in 、V in 、W inIt is more reliable and efficient to connect with the PCB adapter board by soldering.

[0039] Preferably, in this embodiment, the U of the winding of the coil 22 com , V com and W com The tails are welded, the welding ends are wrapped with heat shrinkable tubes, and are placed in the slots of the iron core 21.

[0040] Preferably, in this example, the stator assembly adopts a stator injection molding process with a wall thickness of 0.5 mm. The stator assembly not only meets the requirements of high insulation withstand voltage level, and the insulation withstand voltage can reach 1800 VAC 1S, but also meets the requirements of the motor slot fill factor, making the brushless diaphragm booster pump work more stably and efficiently.

[0041] Preferably, in this embodiment, the housing 11 and the iron core 21 are connected with interference fit.

[0042] Preferably, in this embodiment, the iron core 21 is formed by laminating a plurality of silicon steel sheets. The steel sheet material uses 50W470 silicon steel, which has less iron loss and good heat dissipation performance.

[0043] Preferably, in this example, the two-series and two-parallel winding method can be applied to iron cores with different stacking heights, meeting the requirements of 20mm, 30mm, and 40mm iron cores. Different stacking heights not only greatly improve the efficiency, power density of the brushless diaphragm booster pump and meet the requirements of the life and heat dissipation performance of the diaphragm booster pump motor, but also greatly reduce the actual cost of the product. The different iron core stacking heights of 20mm, 30mm, and 40mm can cooperate with the motor assembly design to complete different output powers of motors such as 75W / 95 / 120.

[0044] As Figure 1 shown, preferably, in this embodiment, the insulating plastic skeleton 23 is wrapped around the contact surface between the coil 22 and the iron core 21 by a plastic coating process.

[0045] As Figure 1 shown, preferably, in this embodiment, the support base 12 is provided with four installation positioning holes for positioning and fixedly installing the support base in the water purification device.

[0046] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A stator assembly structure of a brushless diaphragm booster pump, characterized in that: The motor housing (1) comprises a casing (11) and a support base (12), wherein the casing (11) and the support base (12) are fixedly connected by bolts; A stator assembly (2), the stator assembly (2) comprising an iron core (21), a coil (22), an insulating plastic frame (23), a plug pin (24) and a PCB adapter board (25), wherein the insulating plastic frame (23) is wrapped around the surface of the iron core (21), the coil (22) is wound around the iron core (21), one end of the plug pin (24) is fixedly connected to the PCB adapter board (25), and the other end is inserted into and fixed in the iron core (21); The coil (22) is connected in a star shape by means of two series and two parallel windings; The windings of the iron core (21) and the coil (22) are three-phase 12-slot distributed concentrated windings.

2. The stator assembly structure of the brushless diaphragm booster pump according to claim 1 is characterized in that: The winding U of the coil (22) com 、V com and W com The tail is welded, the welded end is wrapped with a thermoplastic tube and placed in the slot of the core.

3. The stator assembly structure of the brushless diaphragm booster pump according to claim 1 is characterized in that: The housing (11) and the iron core (21) are interference-connected.

4. The stator assembly structure of the brushless diaphragm booster pump according to claim 1 is characterized in that: The iron core (21) is formed by stacking a plurality of silicon steel sheets.

5. The stator assembly structure of the brushless diaphragm booster pump according to claim 1 is characterized in that: The insulating plastic frame (23) is wrapped around the contact surface between the coil (22) and the iron core (21) by a plastic wrapping process.

6. The stator assembly structure of the brushless diaphragm booster pump according to claim 1 is characterized in that: The support base (12) is provided with four installation positioning holes.

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