CN206830493U - Brushless DC Drain Pump - Google Patents

Abstract

The utility model provides a brushless direct current drain pump, include: the pump body is internally provided with an outer cavity, a convex column is arranged in the outer cavity, and an inner cavity is arranged in the convex column; the stator component is arranged in the outer cavity and sleeved on the convex column; a rotor assembly disposed within the internal cavity and rotatable therein; the end cover is connected with one end of the pump body opposite to the rotor assembly, a liquid containing cavity is arranged in the end cover, and a water inlet and a water outlet which are respectively communicated with the liquid containing cavity are formed in the end cover; the fan impeller is connected with the rotor component and is positioned in the liquid containing cavity; wherein, be equipped with location structure in the pump body exocoel, be equipped with on the stator module with location structure complex depressed part, through the cooperation of depressed part and location structure with stator module fixed spacing in the pump body. The utility model discloses a brushless direct current drain pump, it can realize that the stator is fixed spacing, is unlikely to the condition of arbitrary angle rotation to appear, ensures the performance of water pump.

Description

Brushless DC Drain Pump

【Technical field】

The utility model relates to a water pump, in particular to a brushless direct current drainage pump.

【Background technique】

Brushless DC water pump, using the principle of permanent magnet brushless DC motor, adding an impeller to its rotor, the shell structure is designed to make the liquid centrifugally move the cavity, because there is no carbon brush, so there will be no sparks; High efficiency, low power consumption, longer life than brushed motors, and low noise.

However, the fixing method of the stator structure in the pump body of the brushless DC water pump in the prior art is relatively complicated. Through the cooperation of a plastic part and the stator and the filling of epoxy resin glue between the circuit board and the stator, although the sealant is filled, the The stator will inevitably rotate, which will affect the performance of the pump.

【Content of utility model】

In order to solve the problem that the stator will rotate and affect the performance of the water pump in the prior art, the utility model provides a brushless DC drainage pump, which can effectively solve the problem of the stator rotation and realize the fixed position of the stator.

The utility model is the technical solution adopted for solving its technical problems:

Brushless DC sump pump, including:

A pump body, which is provided with an outer cavity, the outer cavity is provided with a convex column, and the convex column is provided with an inner cavity;

a stator assembly, which is arranged in the outer cavity and sleeved on the boss;

a rotor assembly disposed and rotatable within the cavity;

An end cover, which is connected to one end of the pump body opposite to the rotor assembly, the end cover is provided with a liquid containing cavity, and the end cover is provided with a water inlet and a water outlet respectively connected with the liquid containing cavity;

a fan impeller connected to the rotor assembly and located in the liquid chamber;

Wherein, a positioning structure is provided in the outer cavity of the pump body, and a recessed portion cooperating with the positioning structure is provided on the stator assembly, and the stator assembly is fixed and limited in the pump body through the cooperation of the recessed portion and the positioning structure.

The positioning structure is a rib provided on the side wall of the outer cavity and extending along the length direction of the pump body, and the concave part is a groove opened on the edge of the stator assembly.

There are at least two raised ribs, and the two raised ribs are arranged opposite to each other.

An annular step is provided on the boss, and one end of the stator assembly contacts and abuts against the annular step and is fixed on the annular step.

The stator assembly includes a stator. A shaft hole is provided in the middle of the stator. A plurality of winding holes distributed in a ring shape and passing through the stator are provided in the stator on the outside of the shaft hole.

The stator assembly also includes a circuit board fixed on the stator through a bracket, and the circuit board is arranged in the outer cavity.

The rotor assembly includes a rotor shaft on which a magnet rotating with the rotor shaft is arranged, and the fan impeller is connected to an end of the magnet away from the stator assembly.

The impeller wheel includes a connecting portion connected to the magnet, and a plurality of fan blades distributed at intervals are provided on the side wall of the connecting portion.

An annular groove is provided on the end face of the pump body opposite to the liquid-holding chamber, and a sealing ring is arranged in the annular groove to seal the pump body to prevent liquid from leaking from the connection end between the pump body and the end cover.

The end of the pump body away from the end cover is provided with a bottom cover connected with the pump body to protect the stator assembly.

Compared with the prior art, the utility model has the beneficial effect that a positioning mechanism is provided in the pump body, and a recessed part is provided on the stator assembly, and the stator assembly can be fixed and limited in the pump body through the cooperation of the recessed part and the positioning structure, realizing the stator assembly. The orientation of the pump will prevent any rotation at any angle, ensuring the performance of the pump, and has the advantages of long service life and low working noise.

【Description of drawings】

Fig. 1 is a schematic structural view of a brushless DC drainage pump according to an embodiment of the present invention;

Fig. 2 is an exploded schematic diagram 1 of a brushless DC drainage pump according to an embodiment of the present invention;

Fig. 3 is an exploded schematic diagram 2 of the brushless DC drainage pump according to the embodiment of the present invention;

Fig. 4 is a sectional view along A-A direction of Fig. 1 .

【detailed description】

The utility model will be further described below in conjunction with the accompanying drawings and specific embodiments.

Please refer to accompanying drawings 1 to 4 , a brushless DC drainage pump includes a pump body 1 , a stator assembly 2 , a rotor assembly 3 , an end cover 4 , a fan impeller 5 and a bottom cover 7 .

Wherein, the pump body 1 is provided with an outer chamber 11, the outer chamber 11 is provided with a boss 13, and the boss is provided with an inner chamber 12; the stator assembly 2 is arranged in the outer chamber 11 And sleeved on the boss 13 . Specifically, the stator assembly 2 includes a stator 21 and a circuit board 22 connected to the stator. The middle part of the stator 21 is provided with a shaft hole 211 . Distributed and run through the winding holes 212 of the stator. The winding hole is a fan-shaped hole communicating with the shaft hole for coil winding. The circuit board 22 is fixed on the stator 21 through a bracket, and the circuit board is arranged in the outer cavity 11 and the circuit board Epoxy resin glue is potted between 22 and the outer cavity and the stator. The stator and the circuit board are potted with epoxy resin and completely isolated from the rotor, which solves the leakage problem caused by the long-term submersion of the water pump, and can be installed underwater and is completely waterproof.

The rotor assembly 3 includes a rotor shaft 31 on which a rotor core 32 rotating with the rotor shaft is arranged, and the rotor core is a magnet 32 . The rotor shaft is made of high-performance wear-resistant ceramic shaft. There is a ceramic bushing on the rotor shaft. The bushing is integrated with the magnet through injection molding to avoid wear and tear. The life is greatly enhanced, and it has the advantages of high precision and good shock resistance.

The end cover 4 is connected to the end of the pump body 1 opposite to the rotor assembly 3, the end cover 4 is provided with a liquid chamber 41, and the end cover is provided with inlets that communicate with the liquid chamber 41 respectively. Water port 42 and water outlet 43. The water outlet is covered with a soft rubber sealing sleeve to prevent the water outlet from leaking.

The impeller 5 is connected to the rotor assembly 3 and is located in the liquid chamber 41. The impeller rotates to suck the liquid from the water inlet 42 into the liquid chamber 41 and discharge it through the water outlet 43, so as to transport liquid or The purpose of pressurizing a liquid. Specifically, the fan impeller 5 includes a connection portion 51 connected to the magnet 32, the connection portion 51 covers the end of the magnet 32 away from the circuit board 22, and the side wall of the connection portion 51 is provided with several intervals. Distributed fan blades 52.

The end face of the pump body 1 opposite to the liquid-holding chamber 41 is provided with an annular groove 10, and the annular groove 10 is provided with a sealed pump body 1 to prevent liquid from leaking from the connection end of the pump body 1 and the end cover 4. Sealing ring 6. Specifically, the sealing ring is a soft rubber sealing ring, which plays the role of sealing the pump body.

The bottom cover 7 is arranged on the end of the pump body 1 away from the end cover 4 and connected with the pump body to protect the stator assembly 2 .

There is a positioning structure 111 inside the pump body cavity 11 , and the stator 21 is provided with a recessed portion 20 cooperating with the positioning structure. The positioning structure 111 is a rib provided on the side wall of the outer cavity and extending along the length direction of the pump body, and the concave portion 20 is a groove opened on the edge 2 of the stator. There are at least two ribs 111, and the two ribs are opposite to each other. During specific implementation, four ribs can be provided, all of which are distributed on the opposite sides of the side wall of the outer cavity.

In this embodiment, the stator assembly can be fixed and limited in the pump body through the cooperation of the recessed part and the positioning structure, so as to realize the orientation of the stator without any rotation at any angle, ensure the performance of the water pump, and have a long service life and low working noise. advantage.

In order to further fix and limit the stator, the protruding column 13 is provided with an annular step portion 131 , and one end of the stator 21 contacts the annular step portion 131 and is fixed on the annular step portion.

The brushless direct current drainage pump also includes a fixing seat arranged on the pump body for fixing the pump body, and the upper end of the fixing seat is provided with a sleeve hole for being socketed on the pump body. The fixed base adopts a shock-absorbing silicone sleeve, which can improve the shock resistance of the water pump and reduce friction and running noise.

The above descriptions are only preferred embodiments of the present utility model, and are not used to limit the scope of the utility model implementation. Others whose principles and basic structures are the same as or similar to the present utility model are all within the protection scope of the present utility model. Inside.

Claims (10)

1. brushless direct-current draining pump, it is characterised in that：Including：

One pump housing (1), exocoel (11) is provided with it, and the outer intracavitary is provided with projection (13), inner chamber (12) are provided with the projection；

Stator module (2), it is in the exocoel (11) and is sheathed on the projection (13)；

Rotor assembly (3), it is in the inner chamber (12) and can be rotated in it；

One end cap (4), it is connected with one end of the relatively described rotor assembly (3) of the pump housing (1), is provided with the end cap and holds liquid Chamber (41), end cap are provided with the water inlet (42) and delivery port (43) connected respectively with the fluid chamber；

One Vane wheel (5), it is connected with the rotor assembly (3) and in the fluid chamber (41)；

Wherein, location structure (111) is provided with the pump housing exocoel (11), the stator module (2) is provided with and the positioning The depressed part (20) that structure (111) coordinates, stator module (2) is fixed by the cooperation of depressed part and location structure (111) and limited In the pump housing.

2. brushless direct-current draining pump according to claim 1, it is characterised in that：The location structure (111) is located at institute Exocoel (11) side wall and the convex tendon extended along the pump housing (1) length direction are stated, the depressed part (20) is to be opened in stator module (2) The groove at edge.

3. brushless direct-current draining pump according to claim 2, it is characterised in that：The convex tendon (111) is provided with least two, And two convex tendons are oppositely arranged.

4. brushless direct-current draining pump according to claim 1, it is characterised in that：The projection (13) is provided with an annular table Rank portion (131), one end and the annular step (131) of the stator module (2), which contact against, is fixed on annular step On.

5. brushless direct-current draining pump according to claim 1, it is characterised in that：The stator module (2) includes a stator (21), the middle part of the stator is provided with axis hole (211), is provided with the stator (21) on the outside of the axis hole (211) some It is annular in shape to be distributed and through the winding bore (212) of stator.

6. brushless direct-current draining pump according to claim 5, it is characterised in that：The stator module (2) also includes passing through One support is fixedly arranged on the circuit board (22) on stator (21), and the circuit board is in the exocoel (11).

7. brushless direct-current draining pump according to claim 1, it is characterised in that：The rotor assembly (3) includes armature spindle (31), the armature spindle is provided with the magnet (32) rotated with armature spindle, and the Vane wheel (5) is with the magnet (32) away from fixed One end connection of sub-component (2).

8. brushless direct-current draining pump according to claim 7, it is characterised in that：The Vane wheel (5) includes and the magnetic The connecting portion (51) of body (32) connection, the side wall of the connecting portion are provided with some flabellums (52) being spaced apart.

9. brushless direct-current draining pump according to claim 1, it is characterised in that：The relatively described fluid chamber of the pump housing (1) (41) end face is provided with annular groove (10), and the sealing pump housing (1) is provided with to prevent liquid from the pump housing and end cap (4) in the annular groove The sealing ring (6) that spills of connection end.

10. brushless direct-current draining pump according to claim 1, it is characterised in that：The remote end cap (4) of the pump housing (1) One end is provided with and is connected with the pump housing to protect the bottom of the stator module (2) (7).