Pump body mute structure and dish washing machine washing pump

Abstract

The utility model discloses a kind of pump body mute structure and dish-washing machine washing pump, a kind of pump body mute structure, including motor, pump shell and impeller, motor includes stator and rotor, rotor rotatably set in stator, stator adopts BMC integrated plastic package;Pump shell is connected with stator;Impeller is set on rotor, and impeller is located in pump shell. Stator adopts BMC integrated plastic package, by integral cladding stator core and winding, to eliminate high-frequency electromagnetic vibration between stator lamination, can also inhibit electromagnetic noise radiation, improve the structural rigidity of stator, cancel the mechanical connection of the shell and winding of prior art, avoid the possibility that noise is generated by shell and winding vibration collision.

Description

Technical Field

[0001] This utility model relates to the field of dishwasher pump technology, and in particular to a pump body silent structure and a dishwasher washing pump. Background Technology

[0002] The dishwasher pump is the core power component of the dishwasher, undertaking the following two main tasks:

[0003] Washing cycle: After water is pressurized, it is sprayed through the spray arm with high-pressure water jets to wash away the oil stains on the tableware;

[0004] Drainage function: Quickly drains wastewater from the cavity, preparing for the next round of cleaning.

[0005] The stator of the dishwasher pump motor uses screws to connect the housing and the winding frame. Therefore, the vibration generated when the dishwasher pump is running will cause the housing to vibrate and produce noise. Utility Model Content

[0006] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a pump body silent structure that can reduce the noise generated by the stator and improve the user comfort of the dishwasher pump.

[0007] This utility model also proposes a dishwasher washing pump with the above-mentioned pump body silent structure.

[0008] According to a first aspect embodiment of the present invention, a pump body silent structure includes a motor, the motor comprising a stator and a rotor, the rotor being rotatably disposed in the stator, the stator being integrally encapsulated by BMC; a pump casing connected to the stator; and an impeller disposed on the rotor and located within the pump casing.

[0009] The invention offers at least the following beneficial effects: A silent pump body structure includes a motor, a pump casing, and an impeller. The motor comprises a stator and a rotor, with the rotor rotatably mounted within the stator. The stator is integrally encapsulated using BMC (Boiler Molding Machine). The pump casing is connected to the stator. The impeller is mounted on the rotor and located within the pump casing. The BMC integral encapsulation of the stator eliminates high-frequency electromagnetic vibration between the stator laminations by completely covering the stator core and windings. It also suppresses electromagnetic noise radiation, improves the structural rigidity of the stator, and eliminates the mechanical connection between the casing and windings in existing technologies, thus avoiding the possibility of noise generated by vibration and collision between the casing and windings.

[0010] According to some embodiments of the present invention, a connecting nozzle is also included. The connecting nozzle is disposed on the pump housing and configured to connect to a water inlet pipe. A connecting port is provided on the impeller. The connecting port is sleeved on one end of the connecting nozzle. The end of the connecting port near the connecting nozzle extends toward the connecting nozzle to form a mouth ring. The mouth ring has a gap with the outer wall of the connecting port.

[0011] According to some embodiments of the present invention, the connecting nozzle includes a base cylinder, and the connecting port is sleeved on the base cylinder.

[0012] According to some embodiments of the present invention, the connecting nozzle is further provided with an outer ring, and an annular groove is provided between the outer ring and the base cylinder. The connecting port and the port ring are located in the annular groove and do not contact the groove wall of the annular groove.

[0013] According to some embodiments of this utility model, the thickness of the outer ring is equal to the thickness of the base cylinder.

[0014] According to some embodiments of the present invention, the annular groove is provided with a reinforcing inclined surface, which is used to strengthen the structural strength of the outer ring.

[0015] According to some embodiments of this utility model, the base cylinder is provided with a snap-fit ​​groove, and the end of the water inlet pipe is snapped into the snap-fit ​​groove.

[0016] A dishwasher pump according to a second aspect embodiment of the present invention includes a pump body silent structure according to the first aspect embodiment of the present invention.

[0017] It has at least the following beneficial effects: This dishwasher washing pump has all the beneficial effects brought about by the above-mentioned pump body silent structure, which will not be repeated here.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0020] Figure 1 This is a cross-sectional view of an embodiment of the present utility model;

[0021] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 3 This is a cross-sectional view of the connecting nozzle in an embodiment of the present invention;

[0023] Figure 4 This is a cross-sectional view of the impeller in an embodiment of the present invention.

[0024] Icon labels:

[0025] Motor 10, stator 11, and rotor 12;

[0026] Pump casing 20;

[0027] Impeller 30, connecting port 31, mouth ring 32;

[0028] Connecting nozzle 40, base cylinder 41, snap-fit ​​groove 411, outer ring 42, annular groove 43, reinforcing inclined surface 431. Detailed Implementation

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0031] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0032] Reference Figures 1 to 4 This utility model discloses a pump body silent structure, including a motor 10, a pump casing 20 and an impeller 30. The motor 10 includes a stator 11 and a rotor 12. The rotor 12 is rotatably disposed in the stator 11, and the stator 11 is integrally encapsulated by BMC. The pump casing 20 is connected to the stator 11. The impeller 30 is disposed on the rotor 12 and is located in the pump casing 20.

[0033] Understandably, the motor 10, as the power core of the pump body, provides the power source for the operation of the pump body. The stator 11 is integrally encapsulated with BMC (Bulk Molding Compound). By completely covering the stator core and windings, high-frequency electromagnetic vibration between stator laminations is eliminated, electromagnetic noise radiation is suppressed, and the structural rigidity of the stator 11 is improved. The mechanical connection between the outer shell and windings in the prior art is eliminated, and the possibility of noise generated by vibration and collision between the outer shell and windings is avoided.

[0034] The pump casing 20 provides a chamber for containing liquid. After the liquid enters the pump casing 20 from the inlet pipe, it is thrown towards the outlet located on the side wall of the pump casing 20 by the rotation of the impeller 30, and the liquid is pumped out.

[0035] The impeller 30 can convert the mechanical energy of the motor 10 into fluid kinetic energy.

[0036] Reference Figure 1 , Figure 2 as well as Figure 3 A pump body silent structure also includes a connecting nozzle 40, which is disposed on the pump casing 20 and configured to connect to the water inlet pipe. The impeller 30 is provided with a connecting port 31, which is sleeved on one end of the connecting nozzle 40. The end of the connecting port 31 near the connecting nozzle 40 extends toward the connecting nozzle 40 to form a mouth ring 32, and the mouth ring 32 has a gap with the outer wall of the connecting port 31.

[0037] Understandably, in order to ensure a tight connection between the water inlet pipe and the pump casing 20, the pump casing 20 and the water inlet pipe are connected by a connector 40.

[0038] The connection port 31 rotates with the impeller 30, while the connection nozzle 40 is fixed. To prevent friction between the two, there is a gap between the connection nozzle 40 and the connection port 31.

[0039] After the pump body has been running for a period of time, the coaxiality of the rotor 12 and the connecting nozzle 40 will decrease due to equipment aging, wear and other conditions. When the impeller 30 rotates, the connecting nozzle 40 and the connecting port 31 will generate friction. This friction will generate vibration and noise. The mouth ring 32 can reduce the friction area between the connecting nozzle 40 and the connecting port 31 and reduce noise.

[0040] Reference Figure 2 and Figure 3 The connecting nozzle 40 includes a base cylinder 41, and the connecting port 31 is sleeved on the base cylinder 41.

[0041] Understandably, the base cylinder 41 can connect the water inlet pipe to the pump casing 20, and also connect the connecting nozzle 40 to the impeller 30.

[0042] Reference Figure 3The connecting nozzle 40 is also provided with an outer ring 42, and an annular groove 43 is provided between the outer ring 42 and the base cylinder 41. The connecting port 31 and the port ring 32 are located in the annular groove 43 and do not contact the groove wall of the annular groove 43.

[0043] It should be noted that after water enters the connector 40 through the inlet pipe, it enters the impeller 30 through the connector 31. The impeller 30 rotates and, under the action of centrifugal force, throws the water onto the side wall of the pump casing 20 and flows out from the outlet on the side wall of the pump casing 20, thereby increasing the pressure of the water flow. At this time, the water pressure outside the connector 40 is greater than the water pressure inside the connector 40.

[0044] The connection port 31 rotates with the impeller 30, while the connection nozzle 40 is fixed. To prevent friction between the two, there is a gap between the connection nozzle 40 and the connection port 31. When a water pressure difference occurs on both sides, some of the water that should flow out of the outlet will flow back into the connection nozzle 40 from the outside of the gap, reducing the water delivery efficiency.

[0045] By setting the outer ring 42, the outer ring 42, together with the connecting port 31 and the mouth ring 32, forms a complex flow channel, which greatly increases the difficulty of water flowing from the outside of the connecting nozzle 40 back to the inside of the connecting nozzle 40, and improves the water delivery efficiency.

[0046] In some embodiments of this utility model, the thickness of the outer ring 42 is equal to the thickness of the base cylinder 41.

[0047] Understandably, the equal thickness design avoids micro-deformation caused by local stress concentration, ensures consistent sealing gaps, and prevents whistling sounds caused by uneven gaps.

[0048] Reference Figure 2 and Figure 3 The annular groove 43 is provided with a reinforcing inclined surface 431, which is used to strengthen the structural strength of the outer ring 42.

[0049] The reinforced inclined surface 431 can suppress the deformation of the outer ring 42 under high pressure conditions and maintain the stability of the sealing gap; at the same time, it optimizes the flow field distribution and reduces the noise of eddy current shedding.

[0050] Reference Figure 3 The base cylinder 41 is provided with a snap-fit ​​groove 411, and the end of the water inlet pipe is snapped into the snap-fit ​​groove 411.

[0051] The snap-fit ​​connection eliminates the knocking noise caused by the shaking of the water inlet pipe, while also avoiding the stress concentration noise caused by threaded connections.

[0052] The second aspect of this utility model is a dishwasher washing pump, which includes the pump body silent structure of the first aspect.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] Of course, this utility model is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of this utility model. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A pump body silencing structure, characterized by, include: The motor (10) includes a stator (11) and a rotor (12), the rotor (12) being rotatably disposed in the stator (11), the stator (11) being encapsulated by BMC; Pump housing (20), which is connected to the stator (11); Impeller (30), which is disposed on the rotor (12), is located in the pump casing (20).

2. The pump body silent structure according to claim 1, characterized in that, It also includes a connecting nozzle (40), which is disposed on the pump housing (20) and configured to connect to the water inlet pipe. The impeller (30) is provided with a connecting port (31), which is sleeved on one end of the connecting nozzle (40). The end of the connecting port (31) near the connecting nozzle (40) extends toward the connecting nozzle (40) to form a mouth ring (32), and the mouth ring (32) has a gap with the outer wall of the connecting port (31).

3. The pump body silent structure according to claim 2, characterized in that, The connecting nozzle (40) includes a base cylinder (41), and the connecting port (31) is sleeved on the base cylinder (41).

4. The pump body silent structure according to claim 3, characterized in that, The connecting nozzle (40) is also provided with an outer ring (42), and an annular groove (43) is provided between the outer ring (42) and the base cylinder (41). The connecting port (31) and the port ring (32) are located in the annular groove (43) and do not contact the groove wall of the annular groove (43).

5. The pump body silent structure according to claim 4, characterized in that, The thickness of the outer ring (42) is equal to the thickness of the base cylinder (41).

6. The pump body silent structure according to claim 4, characterized in that, The annular groove (43) is provided with a reinforcing inclined surface (431), which is used to strengthen the structural strength of the outer ring (42).

7. The pump body silent structure according to claim 3, characterized in that, The base cylinder (41) is provided with a snap-fit ​​groove (411), and the end of the water inlet pipe is snapped into the snap-fit ​​groove (411).

8. A dishwasher washing pump, characterized in that, The pump body silent structure includes any one of claims 1 to 7.

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