CN213655130U - Electronic air pump with built-in porous silencer and rotary vane - Google Patents

Abstract

The utility model discloses a rotary vane electronic air pump with a built-in porous silencer, which comprises a pump body, a connecting seat and a motor; the pump body comprises an upper sealing cover, an upper porous silencer, an upper cover plate, a stator, a rotor shaft, a lower cover plate, a lower porous silencer and a lower sealing cover, a rotor is arranged in a rotor groove, the rotor shaft is concentrically arranged in an oval cavity of the stator, and a gap between the stator and the rotor shaft forms two sections of symmetrical pump cavities; the stator is provided with an air inlet nozzle hole, an air outlet nozzle, a through air inlet hole and a through air outlet hole; the upper cover plate and the lower cover plate are respectively provided with 2 non-through air inlets, 2 through air outlets, 1 through air outlet and 1 semi-elliptical non-through annular groove; the upper sealing cover and the lower sealing cover are both provided with a reactive silencing expansion air cavity, an upper porous silencer and a lower porous silencer are respectively arranged in the upper sealing cover and the lower sealing cover, and the upper porous silencer and the lower porous silencer are both of porous structures with multilayer circular walls; the pump body and the parts thereof are oval, which is beneficial to the weight reduction, noise reduction and heat dissipation of the air pump.

Description

Electronic air pump with built-in porous silencer and rotary vane

Technical Field

The utility model relates to an electron aspiration pump field especially relates to a built-in porous silencer revolves piece electron aspiration pump.

Background

The rotary-vane electronic air pump is widely applied to the fields of automobile brake vacuum boosting systems, environmental monitoring, air extraction and sampling and the like. For example, in the case of an air compressor compressing air to do work or an environmental monitoring instrument sampling air, a rotary vane electronic air pump with small volume, light weight, high efficiency, low noise, low heat generation and stable flow is required. At present, most of rotary vane electronic air pumps for environment monitoring and sampling are eccentric pump body structures, namely, a rotor is eccentrically arranged in an inner cavity of a stator, and a variable volume air cavity of the air pump is formed by matching the rotor, the stator and two adjacent rotary vanes so as to realize the continuous cycle process of air intake, compression and exhaust. But eccentric formula vane electron aspiration pump's rotor has the eccentricity for the stator, and the rotor produces the eccentric force when the inside high-speed rotation of stator, and the eccentric force makes the vibration of rotor increase, and then aggravates the friction between rotor and the stator and generate heat and the noise, leads to vane electron aspiration pump's energy consumption increase, noise big, generate heat big, efficiency decline and life-span reduce.

Aiming at the problem, compared with an eccentric rotary vane electronic air pump, the symmetrical rotary vane electronic air pump can eliminate the eccentricity and the eccentric force, and further has the advantages of high efficiency, long service life, low power consumption and the like. The rotary vane electronic air pump with the symmetrical structure has the advantages of being more reasonable and more effective, so that the rotary vane electronic air pump with the symmetrical structure is the first choice for the air sampling air pump in the new generation of atmospheric environment monitoring instrument.

Notice No. CN103306979B discloses an electronic vacuum pump for new forms of energy vehicle brake vacuum booster, and this vacuum pump has adopted oval inner chamber structure, has formed 2 air cavities of symmetrical arrangement. A supporting base with a complex structure is designed in a vacuum pump, an air inlet pipe and an air outlet pipe are arranged on the base, when the vacuum pump works, air enters from the air inlet pipe of the supporting base, is divided into a left path and a right path after being buffered in an air storage cavity of the supporting base, respectively enters two air inlet grooves of a lower cover of a pump chamber, and a part of air enters an air inlet through hole of the pump chamber (namely a stator) from bottom to top, reaches the air inlet groove of an upper cover of the pump chamber and then enters an inner cavity of the pump chamber from top to bottom through a diversion groove communicated with the air inlet groove of the; the other part of the gas enters the inner cavity of the pump chamber through the diversion trench communicated with the other part of the gas. The gas entering the closed inner cavity of the pump chamber is finally discharged from the gas outlet pipe of the support base, and a 4-inlet 2-outlet gas path is formed. The structure of the supporting base of the rotary-vane vacuum pump with the symmetrical structure is complex, the air inlet pipeline and the air outlet pipeline are all concentrated on the supporting base, the air path of the vacuum pump during working relates to parts such as the supporting base, a stator, a rotor, a rotary vane, a pump chamber upper cover, a pump chamber lower cover, a pump body cover, a plurality of sealing rings, a driving sleeve and the like, the number of the parts related to the air path is large, and the sealing performance of the pump can be influenced. In order to improve the sealing performance of the pump body, a special-shaped sealing ring or a plurality of annular sealing rings are required to be arranged on the supporting base, the sealing rings are extremely easy to age and deform, the air tightness of the vacuum pump cannot be guaranteed for a long time, and once the vacuum pump leaks air, the performances of the pump, such as air exhaust flow rate, flow stability and the like, can be reduced.

The publication No. CN210686306U discloses a rotary vane electronic air pump, the inner cavity of the pump body also adopts an oval structure, and 2 air cavities which are symmetrically arranged are formed. This patent has designed 4 gas circuits of admitting air and 4 giving vent to anger, and overall structure is more reasonable. However, the CN210686306U patent product still has the problems of heavy overall weight, insufficient heat dissipation performance, no solution to noise elimination, high part processing cost, etc., and needs to be further improved and solved for these weaknesses.

In the CN210686306U patent, first, the pump body (and its related parts) in the CN210686306U patent are circular in view of the light weight of the product. 1) the inner cavities are ellipses with the same size, and 2) the thickness with a certain size is expanded by taking the long axis of the ellipses as the reference to form the outline of the air pump product. Under such conditions, the pump body (and its associated family of parts) having an oval external shape has distinct advantages over the pump body (and its associated family of parts) having a circular external shape. The oval pump body (and its associated series of parts) has equal wall thickness throughout; the circular pump body can be formed only by expanding the wall thickness at the short axis of the elliptical cavity to be equal to the thickness at the long axis of the elliptical cavity. Obviously, the volume of the oval pump body (and related series parts) is reduced, the weight can be greatly reduced, the light weight effect of the product is obvious, and the material is saved. The pump body and related series parts thereof all adopt an oval shape, and the characteristics of self-positioning when the oval parts are matched with the oval parts can be utilized, so that the parts of the pump body cannot rotate mutually, and the positioning precision and the assembling matching precision of a product can be fully ensured during product assembly and product working.

Secondly, the CN210686306U patent product, the design and distribution of its gas circuit are all in the stator part, and its stator is designed with complex structures such as air inlet nozzle hole, non-through air inlet slot, through air inlet hole, air outlet nozzle hole, non-through air outlet slot and through air outlet hole, on one hand, the processing cost of the stator is very high, on the other hand, the stator is the heat source of the air pump (the heat generation is from the high-speed friction between the rotor and the inner wall of the stator), the gas circuit is all designed and distributed inside the stator, so that the gas mainly flows in the circular stator, which is not beneficial to the heat dissipation of the stator part and the whole product. If all parts such as the upper end cover and the lower end cover of the air pump can be fully utilized to participate in heat dissipation, the heat dissipation performance of the air pump product can be greatly improved.

Again, the product of the CN210686306U patent does not address the problem of eliminating product noise caused by friction, vibration and high velocity air flow inside the pump body.

Therefore, the conventional symmetric rotary vane electronic air pump still has the problems of large overall weight, poor heat dissipation performance and poor noise elimination and reduction performance, and therefore, how to design a rotary vane electronic air pump with small weight, heat dissipation and noise reduction becomes a problem to be solved urgently.

SUMMERY OF THE UTILITY MODEL

The utility model provides a built-in porous silencer rotor plate electron aspiration pump to solve current electron aspiration pump heavy in weight, heat dispersion not good, the bad problem of noise elimination and noise reduction performance.

The utility model provides a built-in porous silencer revolves piece electron aspiration pump, include: the pump body is connected with the motor through the connecting seat; the pump body is oval;

the pump body comprises an upper sealing cover, an upper porous silencer, an upper cover plate, a stator, a rotor shaft, a lower cover plate, a lower porous silencer and a lower sealing cover, wherein a plurality of rotor plate grooves are uniformly distributed along the circumference on the rotor shaft;

the upper sealing cover, the upper porous silencer, the upper cover plate, the stator provided with the rotor shaft, the lower cover plate, the lower porous silencer and the lower sealing cover are sequentially connected from top to bottom, the lower sealing cover is connected with the connecting seat, and the upper sealing cover and the lower sealing cover seal the pump body; the shapes of the upper sealing cover, the upper cover plate, the stator, the lower cover plate and the lower sealing cover are all oval; when a product is assembled and works, the upper sealing cover, the upper cover plate, the stator, the lower cover plate and the lower sealing cover are mutually self-positioned through oval shapes, and the upper sealing cover, the upper cover plate, the stator, the lower cover plate and the lower sealing cover cannot rotate mutually to ensure positioning precision and assembling matching precision;

the stator is provided with an air inlet nozzle hole, an air outlet nozzle hole, a through air inlet hole and a through air outlet hole;

the upper cover plate is provided with two non-through upper air inlets, two through upper air outlets, a through upper air outlet hole and an upper non-through semi-elliptical ring groove, and the upper non-through semi-elliptical ring groove is connected with the two non-through upper air inlets;

the lower cover plate is provided with two non-through lower air inlets, two through lower air outlets, a through lower air outlet hole and a lower non-through semi-elliptical ring groove, and the lower non-through semi-elliptical ring groove is connected with the two non-through lower air inlets;

the upper sealing cover is provided with a first resistant silencing expansion air cavity for dissipating heat and silencing compressed high-speed air flow passing through the air cavity, and an upper porous silencer is arranged in the first resistant silencing expansion air cavity;

the lower sealing cover is provided with a second reactive silencing expansion air cavity for dissipating heat and silencing compressed high-speed air flow passing through the air cavity, and a lower porous silencer is arranged in the second reactive silencing expansion air cavity;

the upper porous silencer is provided with two first air inlets, a third resistance silencing expansion air cavity positioned in the center and a multi-layer first circular silencing wall, and is used for silencing two paths of air flows flowing out of two penetrating upper air outlets of the upper cover plate;

the lower porous silencer is provided with two second air inlets, a fourth resistance silencing expansion air cavity positioned in the center and a multi-layer second annular silencing wall, and is used for silencing two paths of air flows flowing out of the two lower air outlets of the lower cover plate;

the air inlet nozzle hole is directly communicated with the through air inlet hole, and the through air inlet hole is indirectly communicated with the two non-through upper air inlet holes; the through air inlet is indirectly communicated with the two non-through lower air inlets to form four paths of inlet air flow;

the air outlet nozzle hole is communicated with the through air outlet hole, and the through air outlet hole is communicated with the through upper air outlet hole and the through lower air outlet hole; the through upper air outlet hole is communicated with the first resistant silencing expansion air cavity, and the through lower air outlet hole is communicated with the second resistant silencing expansion air cavity, so that four paths of air outlet flows after silencing treatment are formed.

Optionally, the upper sealing cover is provided with a first shaft hole, the upper porous muffler is provided with a second shaft hole, the upper cover plate is provided with a third shaft hole, the upper end surface of the upper sealing cover is provided with a first bearing mounting ring, the first bearing mounting ring is communicated with the second shaft hole and the third shaft hole, and a bearing is mounted in the first bearing mounting ring;

the first resistant silencing expansion air cavity is arranged at the center of the lower surface of the upper sealing cover, and is used for carrying out resistant silencing on the inflowing high-speed air flow and dissipating heat on two paths of high-temperature air passing through the first resistant silencing expansion air cavity;

the two non-through upper air inlets of the upper cover plate are communicated with the pump cavity, the two non-through upper air inlets of the upper cover plate are communicated with each other through an upper non-through semi-elliptical ring groove of the upper cover plate, and the upper non-through semi-elliptical ring groove of the upper cover plate is communicated with the stator through air inlet;

the two through upper air outlets of the upper cover plate are communicated with the pump cavity, the two through upper air outlets are communicated with the two first air inlets of the upper porous silencer, and the upper cover plate is arranged on the lower surface of the upper sealing cover;

the upper cover plate and the upper sealing cover are self-positioned through an oval structure, the upper cover plate and the upper sealing cover are directly assembled, and the upper cover plate and the upper sealing cover cannot rotate.

Optionally, the lower sealing cover is provided with a fourth shaft hole, the lower porous muffler is provided with a fifth shaft hole, the lower cover plate is provided with a sixth shaft hole, a fourth bearing mounting ring is arranged on the lower end face of the lower sealing cover and communicated with the fifth shaft hole and the sixth shaft hole, and a bearing is mounted in the fourth bearing mounting ring;

the second reactive noise elimination expansion air cavity is arranged in the center of the upper surface of the lower sealing cover, and is used for performing reactive noise elimination on the inflowing high-speed air flow and dissipating heat of two paths of high-temperature air passing through;

the two non-through lower air inlets of the lower cover plate are communicated with the pump cavity, the two non-through lower air inlets of the lower cover plate are communicated with each other through a lower non-through semi-elliptical ring groove of the lower cover plate, and the lower non-through semi-elliptical ring groove of the lower cover plate is communicated with a through air inlet hole of the stator; the two lower through air outlets of the lower cover plate are communicated with the pump cavity, and the two lower through air outlets are communicated with the two second air inlets of the lower porous silencer; the lower cover plate is arranged on the upper surface of the lower sealing cover;

the maximum outline of the lower sealing cover is provided with four mounting lugs which connect the pump body with the connecting seat; the lower surface of the lower sealing cover is provided with a circular ring matching step, the outer diameter of the circular ring matching step is equal to the inner diameter of an inner hole at the upper surface of the connecting seat, and the outer diameter of the circular ring matching step is matched with the inner diameter of the inner hole at the upper surface of the connecting seat, so that the concentricity of the rotor shaft and the motor shaft of the motor is ensured;

the connecting seat is of a cuboid structure with a hollow-out part penetrating through the connecting seat, the diameter of an inner hole at the lower surface of the connecting seat is equal to the outer diameter of the motor flange, and the diameter of the inner hole at the lower surface of the connecting seat is matched with the outer diameter of the motor flange, so that the concentricity of the rotor shaft and the motor shaft of the motor is ensured;

the lower cover plate and the lower sealing cover are self-positioned through an oval structure, the lower cover plate and the lower sealing cover are directly assembled, and the lower cover plate and the lower sealing cover cannot rotate.

Optionally, the stator is provided with one air inlet nozzle hole, one air outlet nozzle hole, one through air inlet hole and one through air outlet hole, and the air inlet nozzle hole and the air outlet nozzle hole are both arranged on the outer wall of the stator;

the air inlet nozzle hole is communicated with the through air inlet hole, the through air inlet hole is communicated with the upper non-through semi-elliptical annular groove, and the through air inlet hole is also communicated with the lower non-through semi-elliptical annular groove to form four air inlet airflow channels;

the air outlet nozzle hole is communicated with the through air outlet hole, and the through air outlet hole is respectively communicated with the through upper air outlet hole of the upper cover plate and the through lower air outlet hole of the lower cover plate; two through upper air outlets of the upper cover plate are communicated with two first air inlets of the upper porous silencer, and two through lower air outlets of the lower cover plate are communicated with two second air inlets of the lower porous silencer; the through upper air outlet hole of the upper cover plate is communicated with the first resistant silencing expansion air cavity, and the through lower air outlet hole of the lower cover plate is communicated with the second resistant silencing expansion air cavity to form four silencing air outlet air flow channels;

and the outer wall of the stator is provided with a heat dissipation groove and a heat dissipation edge.

Optionally, the built-in upper porous muffler and the built-in lower porous muffler of the electronic air suction pump with the built-in porous muffler rotary vane have the same shape and are both of a multi-layer circular wall structure, the built-in upper porous muffler is positioned in the elliptical first reactive muffling expansion cavity, and the built-in lower porous muffler is positioned in the elliptical second reactive muffling expansion cavity;

each layer of the first annular silencing wall is provided with a plurality of first silencing ventilation through holes;

each layer of second annular silencing wall is provided with a plurality of second silencing ventilation through holes;

the number of the first circular ring noise elimination walls is 2-5, the wall thickness of each first circular ring noise elimination wall is 0.2-40mm, the first noise elimination ventilation through holes formed in each first circular ring noise elimination wall are square holes or round holes, the aperture size of each first noise elimination ventilation through hole is 0.02-40mm, and the ratio of the total area of the first noise elimination ventilation through holes formed in each first circular ring noise elimination wall to the area of the circular ring wall is 2-25%; the distance between two adjacent layers of first circular ring noise elimination walls is 2-200 mm;

the number of the second circular ring silencing walls is 2-5, the wall thickness of each second circular ring silencing wall is 0.2-40mm, the second silencing ventilation through holes formed in each second circular ring silencing wall are square holes or round holes, the aperture size of each second silencing ventilation through hole is 0.02-40mm, and the ratio of the total area of the second silencing ventilation through holes formed in each second circular ring silencing wall to the area of the circular ring wall is 2-25%; the distance between two adjacent layers of second circular ring noise elimination walls is 2-200 mm.

Optionally, an elliptical first sealing step is arranged on the outer edge of one side, close to the upper sealing cover, of the stator, an elliptical second sealing step is arranged on the outer edge of one side, close to the lower sealing cover, of the stator, an elliptical first snap-back cover is arranged on one side, close to the stator, of the upper sealing cover, and an elliptical second snap-back cover is arranged on one side, close to the stator, of the lower sealing cover;

the shape and the size of the oval first sealing step of the stator are the same as those of the shape and the size of the inner hole of the oval first snap-back cover of the upper sealing cover; the elliptical first sealing step of the stator is matched with the elliptical first snap-back cover of the upper sealing cover to seal the upper end of the pump body; between the stator and the upper sealing cover, the stator and the upper sealing cover cannot rotate through the oval first sealing step and the oval shape of the oval first snap-back cover for self-positioning;

the shape and the size of the oval second sealing step of the stator are the same as those of the inner hole of the oval second back-buckling cover of the lower sealing cover; the elliptical second sealing step of the stator is matched with the elliptical second back buckling cover of the lower sealing cover to seal the lower end of the pump body; between the stator and the lower sealing cover, the stator and the lower sealing cover cannot rotate through the elliptical second sealing step and the elliptical appearance self-positioning of the elliptical second snap-back cover;

the upper sealing cover, the upper porous silencer, the upper cover plate and the upper surface of the stator are provided with corresponding first screw holes;

and the lower sealing cover, the lower porous silencer, the lower cover plate and the lower surface of the stator are provided with corresponding second screw holes.

Optionally, the rotor shaft is connected with a rotating shaft of the motor through a coupling, the rotor shaft is of a stepped shaft structure, a rotor part is arranged at the position with the largest diameter of the middle section of the rotor shaft, and the rotor part is provided with a plurality of through rotor blade grooves which are uniformly distributed along the circumference; the length of the rotor part along the axial direction is equal to that of the stator along the axial direction, the diameter of the rotor part is equal to the length of the minor axis of the oval cavity, and the diameters of the shafts at two ends of the rotor shaft are equal to that of the central hole of the bearing;

the upper part of the rotor shaft is respectively and sequentially provided with an upper cover plate, an upper porous silencer, an upper sealing cover and a bearing; a stator is sleeved outside a rotor part of the rotor shaft; and the lower part of the rotor shaft is respectively and sequentially provided with a lower cover plate, a lower porous silencer, a lower sealing cover and a bearing.

Optionally, the number of the rotor slots is the same as the number of the rotors, and the number of the rotor slots is one of five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty-one, twenty-two, twenty-three, twenty-four, twenty-five, twenty-six, twenty-seven, or twenty-eight.

Optionally, the elliptical shape of the elliptical cavity is expressed by any one of an elliptic function curve equation, an involute function curve equation, a logarithmic spiral equation or a sinusoidal spiral function curve equation.

According to the technical scheme, the utility model provides a built-in porous silencer rotor electronic air pump, which comprises a pump body, a connecting seat and a motor; the pump body comprises an upper sealing cover, an upper porous silencer, an upper cover plate, a stator, a rotor shaft, a lower cover plate, a lower porous silencer and a lower sealing cover, wherein a plurality of rotor plate grooves which are uniformly distributed along the circumference are formed in the rotor shaft; the stator is provided with an air inlet nozzle hole, an air outlet nozzle, a through air inlet hole and a through air outlet hole; the upper cover plate and the lower cover plate are respectively provided with 2 non-through air inlets, 2 through air outlets, 1 through air outlet and 1 semi-elliptical non-through annular groove; the upper sealing cover and the lower sealing cover are both provided with a reactive silencing expansion air cavity, an upper porous silencer and a lower porous silencer are respectively arranged in the upper sealing cover and the lower sealing cover, and the upper porous silencer and the lower porous silencer are both of porous structures with multilayer circular walls; the pump body and the parts thereof are oval, which is beneficial to the weight reduction, noise reduction and heat dissipation of the air pump.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to these drawings without any creative effort.

Fig. 1 is an exploded view of the overall structure of a rotary vane electronic air pump with a built-in porous muffler provided by the present invention;

FIG. 2 is an assembly view of the rotary vane electronic air pump with a built-in porous muffler provided by the present invention;

FIG. 3 is a top view of a five-vane pump body structure;

FIG. 4 is a side view of a five-vane pump body structure;

FIG. 5 is a top view of a six-vane pump body structure;

FIG. 6 is a side view of a six-vane pump body configuration;

FIG. 7 is a top plan view of the upper surface of the stator;

FIG. 8 is a side view of the upper surface of the stator;

FIG. 9 is a top view of the lower surface of the stator;

FIG. 10 is a side view of the lower surface of the stator;

FIG. 11 is a top view of the rotor shaft;

FIG. 12 is a front view of the rotor shaft;

FIG. 13 is a side view of the rotor shaft;

FIG. 14 is a top view of the lower surface of the upper cover plate;

FIG. 15 is a top plan view of the upper surface of the upper cover plate;

FIG. 16 is a top side view of the upper cover plate;

FIG. 17 is a top plan view of the upper surface of the lower cover plate;

FIG. 18 is a top view of the lower surface of the lower deck;

FIG. 19 is a side view of the upper surface of the lower cover plate;

FIG. 20 is a top plan view of the upper surface of the upper seal cap;

FIG. 21 is a side view of the upper surface of the upper seal cap;

FIG. 22 is a top view of the lower surface of the upper seal cap;

FIG. 23 is a side view of the lower surface of the upper seal cap;

FIG. 24 is a top plan view of the upper surface of the lower seal cap;

FIG. 25 is a side view of the upper surface of the lower seal cap;

FIG. 26 is a top view of the lower surface of the lower seal cap;

FIG. 27 is a side view of the lower surface of the lower seal cap;

FIG. 28 is a schematic view of the upper porous muffler structure;

FIG. 29 is a schematic view of the porous structure of the upper porous muffler;

FIG. 30 is a schematic view of a lower porous muffler structure;

FIG. 31 is a schematic view of the porous structure of the lower porous muffler;

FIG. 32 is a flow chart of muffling airflow of the upper 2-path exhaust airflow in the "upper sealing cover, upper porous muffler and upper cover plate matching";

FIG. 33 is a flow chart of muffling airflow of the lower 2-way exhaust airflow in the "lower sealing cover, lower porous muffler, lower cover plate fit";

fig. 34 is a schematic perspective view of the connecting seat;

fig. 35 is another perspective view of the connecting socket.

Illustration of the drawings:

wherein, 10-upper sealing cover; 20-an upper cover plate; 30-a stator; 40-a rotor shaft; 50-a lower cover plate; 60-lower sealing cover; 70-upper porous muffler; 80-lower porous muffler; 90-pump chamber; 100-a pump body; 200-a connecting seat; 300-a motor; 400-a coupler; 101-a first resistant sound damping expansion air cavity; 102-a first shaft hole; 103-a first bearing mounting ring; 104-a first snap-back cover; 105-an annular groove; 128-a first screw hole; 129-a second screw hole; 201-a non-through upper inlet; 202-run through the upper air outlet; 203-through the upper air outlet hole; 204-a non-through semi-elliptical ring groove is arranged on the upper part; 205-third shaft hole; 301-elliptical cavity; 302-air inlet nozzle hole; 303-air outlet nozzle hole; 304-through air intake; 305-through air outlet holes; 306-heat sink; 307-radiating ribs; 308-a first sealing step; 309-a second sealing step; 401-a rotor slot; 501-a non-through lower air inlet; 502-a lower air outlet is communicated; 503-penetrating a lower air outlet; 504-lower non-through semi-elliptical circular groove; 505-a sixth shaft hole; 601-a second reactive noise elimination expansion air cavity; 602-a fourth shaft hole; 603-installing a ring on a fourth bearing; 604-installing earrings; 605-ring mating step; 606-a second snap-back cover; 701-a first air inlet; 702-a third resistant sound damping expansion air cavity; 703-a first annular sound-damping wall; 704-a second shaft hole; 801-a second air inlet; 802-a fourth resistant sound-damping expansion air cavity; 803-a second annular sound-attenuating wall; 804-a fifth shaft hole; 4011-gyroplane; 7031-a first muffling vent via; 8031-second muffling vent via.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the present application, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be implemented in other ways different from the description below, and one skilled in the art may similarly generalize the present invention without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.

As shown in fig. 1 and fig. 2, the utility model provides a built-in porous silencer rotor electronic air pump, include: the pump body 100 is connected with the motor 300 through the connecting seat 200; the pump body 100 is oval;

as shown in fig. 1, 3, 4, 5 and 6, the pump body 100 includes an upper sealing cover 10, an upper porous muffler 70, an upper cover plate 20, a stator 30, a rotor shaft 40, a lower cover plate 50, a lower porous muffler 80 and a lower sealing cover 60, as shown in fig. 11, 12, 13 and 5, the rotor shaft 40 is provided with a plurality of rotor slots 401 uniformly distributed along the circumference, rotor blades 4011 are provided in the rotor slots 401, the stator 30 is provided with an elliptical cavity 301, the rotor shaft 40 is concentrically arranged in the elliptical cavity 301 of the stator 30, the outer diameter of the rotor shaft 40 is equal to the minor axis length of the elliptical cavity 301, a gap between the stator 30 and the rotor shaft 40 forms a two-stage symmetric pump cavity 90, one end of the rotor blade 4011 is located in the rotor slot 401, and the other end of the rotor blade 4011 abuts against the inner wall of the elliptical cavity 301, every two adjacent rotor blades 4011 are mutually matched with the rotor shaft 40 and the stator 30 to form a subunit of a variable volume air cavity, and the subunit of the variable volume air cavity generates a gas suction, compression and exhaust cycle process;

as shown in fig. 1 and 2, the upper sealing cover 10, the upper porous muffler 70, the upper cover plate 20, the stator 30 provided with the rotor shaft 40, the lower cover plate 50, the lower porous muffler 80, and the lower sealing cover 60 are sequentially connected from top to bottom, the lower sealing cover 60 is connected to the connecting seat 200, and the upper sealing cover 10 and the lower sealing cover 60 are used for sealing the pump body 100; the shapes of the upper sealing cover 10, the upper cover plate 20, the stator 30, the lower cover plate 50 and the lower sealing cover 60 are all oval; when a product is assembled and works, the upper sealing cover 10, the upper cover plate 20, the stator 30, the lower cover plate 50 and the lower sealing cover 60 are self-positioned by oval shapes, and the upper sealing cover 10, the upper cover plate 20, the stator 30, the lower cover plate 50 and the lower sealing cover 60 cannot rotate mutually to ensure positioning precision and assembling matching precision;

as shown in fig. 7, 8, 9 and 10, the stator 30 is provided with an air inlet nozzle hole 302, an air outlet nozzle hole 303, a through air inlet hole 304 and a through air outlet hole 305;

as shown in fig. 14, 15 and 16, the upper cover plate 20 is provided with two non-through upper air inlets 201, two through upper air outlets 202, a through upper air outlet 203 and an upper non-through semi-elliptical ring groove 204, and the upper non-through semi-elliptical ring groove 204 connects the two non-through upper air inlets 201;

as shown in fig. 17, 18 and 19, the lower cover plate 50 is provided with two non-through lower air inlets 501, two through lower air outlets 502, a through lower air outlet 503 and a lower non-through semi-elliptical ring groove 504, and the lower non-through semi-elliptical ring groove 504 connects the two non-through lower air inlets 501;

as shown in fig. 20, 21, 22 and 23, the upper sealing cover 10 is provided with a first resistant sound attenuation expansion air cavity 101 for dissipating heat and attenuating sound of the compressed high-speed airflow passing through, and the first resistant sound attenuation expansion air cavity 101 is internally provided with an upper porous sound attenuator 70;

as shown in fig. 24, 25, 26 and 27, the lower sealing cover 60 is provided with a second reactive noise elimination expansion air cavity 601 for dissipating heat and eliminating noise of the compressed high-speed airflow passing through, and the lower porous silencer 80 is installed in the second reactive noise elimination expansion air cavity 601;

as shown in fig. 28 and 29, the upper porous muffler 70 is provided with two first air inlets 701, a third reactive sound-damping expansion air cavity 702 located at the center, and a multi-layer first annular sound-damping wall 703, and the upper porous muffler 70 is configured to damp two air flows flowing out from the two upper air outlets 202 of the upper cover plate 20;

as shown in fig. 30 and fig. 31, the lower porous muffler 80 is provided with two second air inlets 801, a fourth reactive sound-damping expansion air cavity 802 located at the center, and a second annular sound-damping wall 803 in multiple layers, and the lower porous muffler 80 is used for damping two air flows flowing out from the lower air outlet 502 of the lower cover plate 50;

as shown in fig. 8, 9 and 1, the air inlet hole 302 is directly communicated with the through air inlet hole 304, and the through air inlet hole 304 is indirectly communicated with the two non-through upper air inlet holes 201; the through air inlet 304 is indirectly communicated with the two non-through lower air inlets 501 to form four paths of inlet air flow;

as shown in fig. 9, 32, 33 and 1, the air outlet nozzle hole 303 is communicated with the through air outlet hole 305, and the through air outlet hole 305 is communicated with the through upper air outlet hole 203 and the through lower air outlet hole 503; the through upper air outlet 203 is communicated with the first resistant muffling expansion air cavity 101, and the through lower air outlet 503 is communicated with the second resistant muffling expansion air cavity 601, so that four paths of exhaust air flow after muffling treatment are formed.

As shown in fig. 32 and 33, the high-speed airflow compressed by the variable volume air chamber of the pump body 100 flows into the upper porous muffler 70 from the two first air inlets 701 of the upper cover plate 20, which penetrate the upper air outlet 202 and enter the upper porous muffler 70; the high-speed airflow compressed by the variable volume air chamber of the pump body 100 flows into the lower porous muffler 80 from the two second air inlets 801 of the lower cover plate 50, which penetrate through the lower air outlet 502 and enter the lower porous muffler 80.

Alternatively, the upper sealing cover 10 is provided with a first shaft hole 102 (as shown in fig. 22 and 23), the upper porous muffler 70 is provided with a second shaft hole 704 (as shown in fig. 28), the upper cover plate 20 is provided with a third shaft hole 205 (as shown in fig. 15), the upper end surface of the upper sealing cover 10 is provided with a first bearing mounting ring 103 (as shown in fig. 20 and 21), the first bearing mounting ring 103 is communicated with the second shaft hole 704 and the third shaft hole 205, and a bearing is mounted in the first bearing mounting ring 103;

the first resistant silencing expansion air cavity 101 is arranged in the center of the lower surface of the upper sealing cover 10, the first resistant silencing expansion air cavity 101 is used for resistant silencing of inflowing high-speed air flow, and the first resistant silencing expansion air cavity 101 is also used for heat dissipation of two paths of high-temperature air flowing through;

a large-volume elliptical first resistant sound attenuation expansion air cavity 101 (as shown in fig. 22) is arranged at the center of the lower surface of the upper sealing cover 10, so that on one hand, the air cavity can play a role of resistant sound attenuation on the high-speed air flow flowing in; on the other hand, after the porous silencer 70 is arranged in the large-volume elliptical first resistance silencing expansion air cavity 101, the flowing high-speed airflow can be effectively silenced; more importantly, the upper sealing cover 10 can be used for effectively dissipating heat of two paths of circulating high-temperature gas, so that heat generated by the rotary vane 4011 and the stator 30 in the pump body 100 continuously under high-speed friction and not easy to dissipate and conduct from the inside is dissipated, and heat dissipation is realized to the maximum extent by the maximum heat dissipation surface area of the upper sealing cover 10 and the advantage of the large-volume elliptical first resistance noise elimination expansion air cavity 101 arranged on the upper sealing cover 10.

As shown in fig. 1, 14, 15, 16 and 32, the two through upper air outlets 202 of the upper cover plate 20 are communicated with the pump chamber 90, the two through upper air outlets 202 are communicated with the two first air inlets 701 of the upper porous muffler 70, and the upper non-through semi-elliptical annular groove 204 of the upper cover plate 20 is communicated with the through air inlet 304 of the stator 30; the two through upper air outlets 202 of the upper cover plate 20 are communicated with the pump chamber 90, and the two through upper air outlets 202 are communicated with the two first air inlets 701 of the upper porous muffler 70;

as shown in fig. 32, the two paths of compressed gas from the pump chamber 90 flow into the two first inlets 701 of the upper porous muffler 70 after exiting from the two through upper air outlets 202 of the upper cover plate 20, so as to perform sound attenuation inside the upper porous muffler 70.

The upper cover plate 20 and the upper sealing cover 10 are self-positioned through an oval structure, the upper cover plate 20 and the upper sealing cover 10 are directly assembled, and the upper cover plate 20 and the upper sealing cover 10 cannot rotate.

The upper cover plate 20 is arranged on the lower surface of the upper sealing cover 10, and the upper cover plate 20 and the upper sealing cover 10 can be directly assembled and accurately positioned by utilizing the self-positioning function that the upper cover plate 20 and the upper sealing cover 10 are both in an elliptical shape. Positioning structures such as clamping grooves and clips do not need to be specially designed and processed between the upper cover plate 20 and the upper sealing cover 10, and the processing cost of the two parts of the upper cover plate 20 and the upper sealing cover 10 can be saved. The outer circumferential surface of the bearing mounting ring of the upper sealing cover 10 is further provided with an annular groove 105 (as shown in fig. 21), which facilitates the assembly and disassembly of the upper sealing cover 10 during the assembly and maintenance of the product.

Alternatively, the lower sealing cover 60 is provided with a fourth shaft hole 602, the lower porous muffler 80 is provided with a fifth shaft hole 804 (as shown in fig. 30), the lower cover plate 50 is provided with a sixth shaft hole 505 (as shown in fig. 17 and 18), the lower end surface of the lower sealing cover 60 is provided with a fourth bearing mounting ring 603 (as shown in fig. 27), the fourth bearing mounting ring 603 is communicated with the fifth shaft hole 804 and the sixth shaft hole 505, and a bearing is mounted in the fourth bearing mounting ring 603;

as shown in fig. 24 and 25, the second reactive noise elimination expanding air cavity 601 is disposed at the center of the upper surface of the lower sealing cover 60, the second reactive noise elimination expanding air cavity 601 is used for performing reactive noise elimination on the inflow high-speed air flow, and the second reactive noise elimination expanding air cavity 601 is further used for dissipating heat of two paths of high-temperature air flowing through;

as shown in fig. 17, 33 and 1, the two non-through lower air inlets 501 of the lower cover plate 50 are communicated with the pump chamber 90, the two non-through lower air inlets 501 of the lower cover plate 50 are communicated with each other through the lower non-through semi-elliptical ring groove 504 of the lower cover plate 50, and the lower non-through semi-elliptical ring groove 504 of the lower cover plate 50 is communicated with the through air inlet holes 304 of the stator 30; the two lower through air outlets 502 of the lower cover plate 50 are communicated with the pump cavity 90, and the two lower through air outlets 502 are communicated with the two second air inlets 801 of the lower porous muffler 80; the lower cover plate 50 is disposed on the upper surface of the lower sealing cover 60;

the center of the upper surface of the lower sealing cover 60 is provided with a large-volume second resistant silencing expansion air cavity 601, so that on one hand, the function of resistant silencing of inflowing high-speed airflow can be achieved; on the other hand, after the lower porous silencer 80 is arranged in the large-volume second reactive silencing expansion air cavity 601, the flowing-in high-speed airflow can be more effectively silenced; more importantly, the lower sealing cover 60 can be used for effectively dissipating heat of two paths of circulating high-temperature gas, so that heat generated by the rotary vane 4011 and the stator 30 in the pump body 100 continuously under high-speed friction and not easy to dissipate and conduct from the inside is dissipated, and heat dissipation is realized to the maximum extent by the maximum heat dissipation surface area of the lower sealing cover 60 and the advantage of the large-volume elliptical second reactive noise elimination expansion air cavity 601 arranged on the lower sealing cover 60.

As shown in fig. 33, the two paths of compressed gas from the pump chamber 90 flow into the two second gas inlets 801 of the lower porous muffler 80 after exiting from the two through lower gas outlets 502 of the lower cover plate 50, so as to realize sound attenuation inside the lower porous muffler 80.

As shown in fig. 24, 25 and 27, four mounting lugs 604 are provided at the maximum outline of the lower seal cover 60, and the mounting lugs 604 are used for connecting the pump body 100 with the connecting seat 200; the lower surface of the lower sealing cover 60 is provided with a circular ring matching step 605, the outer diameter of the circular ring matching step 605 is equal to the inner diameter of an inner hole at the upper surface of the connecting seat 200, and the outer diameter of the circular ring matching step 605 is matched with the inner diameter of the inner hole at the upper surface of the connecting seat 200, so that the concentricity of the rotor shaft 40 and the motor shaft of the motor 300 is ensured;

as shown in fig. 34 and 35, the connecting seat 200 is a rectangular parallelepiped structure with a hollow-out interior, the diameter of the inner hole at the lower surface of the connecting seat 200 is equal to the outer diameter of the flange of the motor 300, and the diameter of the inner hole at the lower surface of the connecting seat 200 is matched with the outer diameter of the flange of the motor 300, so as to ensure the concentricity of the rotor shaft 40 and the motor shaft of the motor 300;

the lower cover plate 50 and the lower sealing cover 60 are self-positioned through an oval structure, and the lower cover plate 50 and the lower sealing cover 60 cannot rotate.

The lower cover plate 50 and the lower sealing cover 60 can be directly assembled and accurately positioned by utilizing the self-positioning function that the lower cover plate and the lower sealing cover are both in an elliptical shape. Positioning structures such as clamping grooves and clips do not need to be specially designed and processed between the lower cover plate 50 and the lower sealing cover 60, and the processing cost of the two parts of the lower cover plate 50 and the lower sealing cover 60 can be saved.

As shown in fig. 7 and fig. 9, optionally, the stator 30 is provided with one air inlet hole 302, one air outlet hole 303, one through air inlet hole 304, and one through air outlet hole 305, the air inlet hole 302 and the air outlet hole 303 are both disposed on the outer wall of the stator 30, and the inner walls of the air inlet hole 302 and the air outlet hole 303 are tapped with internal threads, so as to facilitate installation of an air faucet with external threads;

as shown in fig. 7, 9 and 1, the air inlet hole 302 is communicated with the through air inlet hole 304, the through air inlet hole 304 is communicated with the upper non-through semi-elliptical ring-shaped groove 204, and the through air inlet hole 304 is further communicated with the lower non-through semi-elliptical ring-shaped groove 504 to form four air inlet airflow channels;

as shown in fig. 7, 9, 32, 33 and 1, the air outlet nozzle 303 is communicated with the through air outlet 305, and the through air outlet 305 is communicated with the through upper air outlet 203 and the through lower air outlet 503 respectively; the two through upper air outlets 202 are communicated with the two first air inlets 701, and the two through lower air outlets 502 are communicated with the two second air inlets 801; the through upper air outlet 203 is communicated with the first resistant silencing expansion air cavity 101, and the through lower air outlet 503 is communicated with the second resistant silencing expansion air cavity 601 to form four silencing air outlet flow channels;

the specific process of the intake airflow is as follows: because the upper non-through semi-elliptical ring-shaped groove 204 is communicated with the two non-through upper air inlets 201, the lower non-through semi-elliptical ring-shaped groove 504 is communicated with the two non-through lower air inlets 501 of the lower cover plate 50; therefore, the through intake holes 304 are indirectly communicated with the two non-through upper intake ports 201 and the two non-through lower intake ports 501, respectively. The air flow enters the pump chamber 90 through one of the inlet nozzle holes 302, one of the through inlet holes 304, two non-through upper inlet ports 201, and two non-through lower inlet ports 501, collectively defining four of the inlet air flow paths.

The specific air flow process of giving vent to anger is: the compressed gas in the pump cavity 90 flows out through the two through upper gas outlets 202 of the upper cover plate 20, and because the two through upper gas outlets 202 of the upper cover plate 20 are communicated with the two first gas inlets 701, the two gas flows into the two first gas inlets 701, and after being subjected to noise elimination treatment by the upper porous silencer 70, the two gas flows together into the large-volume elliptical first resistant noise elimination expanding gas cavity 101 of the upper sealing cover 10, and then flows out through the through upper gas outlets 203 of the upper cover plate 20, flows into the through gas outlets 305, and flows out from the gas outlet nozzle holes 303; the compressed air in the pump cavity 90 flows out through the two through lower air outlets 502 of the lower cover plate 50, and because the two through lower air outlets 502 of the lower cover plate 50 are communicated with the two second air inlets 801 of the lower porous muffler 80, the two air flows into the two second air inlets 801, after the noise elimination treatment of the lower porous muffler 80, the air is collected into the large-volume second anti-reactive noise elimination expanding air cavity 601 of the lower sealing cover 60, and then is introduced into the through air outlet 305 through the through lower air outlet 503 of the lower cover plate 50 and flows out from the air outlet nozzle hole 303. Four of the silencing air outlet flow channels are formed in the whole.

As shown in fig. 8, the outer wall of the stator 30 is provided with heat dissipation grooves 306 and heat dissipation ribs 307.

The stator 30 is also designed to have an elliptical shape corresponding to the elliptical cavity 301. Under the condition of the oval cavity 301 with the same size, the wall thickness of the stator 30 with the circular shape is different, the wall thickness of the stator 30 with the oval shape is the same, the oval stator 30 can greatly reduce the weight of stator 30 parts, the light weight effect of the product is obvious, and the material is also saved; the stator 30 is only provided with one through air inlet hole 304, one through air outlet hole 305, one air inlet nozzle hole 302 and one air outlet nozzle hole 303, and structures such as a non-through or through annular air inlet slot and a non-through or through annular air outlet slot are not additionally provided, so that on one hand, functionally, four paths of high-temperature and high-speed air flows formed after the pump cavity 90 of the stator 30 is compressed can be realized, two paths of air flows flow through the upper cover plate 20, the upper porous silencer 70 and the upper sealing cover 10, and two paths of air flows through the lower cover plate 50, the lower porous silencer 80 and the lower sealing cover 60, the advantages that the parts have large heat dissipation surface areas and can increase air flow contact areas are conveniently utilized to fully dissipate the compressed high-temperature and high-speed air flows, and the heat dissipation burden of the stator 30 is reduced; on the other hand, the structure of the stator 30 is simple, and the processing cost is greatly reduced; in addition, the outer wall of the stator 30 is further provided with heat dissipation grooves 306 and heat dissipation ribs 307, so as to facilitate heat dissipation and further weight reduction of the product.

As shown in fig. 28 and fig. 30, alternatively, the built-in upper porous muffler 70 and the built-in lower porous muffler 80 of the internal porous muffler rotary vane electronic air pump have the same shape and are both of a multi-layer circular wall structure, the built-in upper porous muffler 70 is located in the elliptical first reactive sound attenuation expansion air cavity 101, and the built-in lower porous muffler 80 is located in the elliptical second reactive sound attenuation expansion air cavity 601;

as shown in fig. 29, each layer of the first annular muffling wall 703 is provided with a plurality of first muffling and ventilating through holes 7031;

as shown in fig. 31, each second annular silencing wall 803 is provided with a plurality of second silencing ventilation through holes 8031;

after the compressed high-speed airflow enters the upper two first air inlets 701 from the two upper air outlets 202, the airflow is guided into the third resistant muffling expansion air cavity 702 in the center of the upper porous muffler 70, and then the airflow flows outwards from inside to outside along a plurality of first muffling ventilation through holes 7031 formed in each layer of the first annular muffling wall 703, so that muffling of noise with different frequencies of the two paths of high-speed airflow above is realized (as shown in fig. 32); after the high-speed airflow enters the two second air inlets 801 from the two lower through air outlets 502, the airflow is guided into the fourth reactive noise elimination expanding air cavity 802 at the center of the lower porous silencer 80, and then the airflow flows outwards from inside to outside along the plurality of second noise elimination vent through holes 8031 formed in each layer of second annular noise elimination wall 803, so that noise elimination of noise with different frequencies of the following two paths of high-speed airflow is realized (as shown in fig. 33).

As shown in fig. 28 and 29, the number of the first annular muffling wall 703 is 2 to 5, the wall thickness of each first annular muffling wall 703 is 0.2 to 40mm, the first muffling and ventilating through holes 7031 formed in each first annular muffling wall 703 are square holes or circular holes, the size of the hole diameter of the first muffling and ventilating through holes 7031 is 0.02 to 40mm, and the ratio of the total area of the first muffling and ventilating through holes 7031 formed in each first annular muffling wall 703 to the area of the annular wall is 2 to 25%; the distance between two adjacent layers of the first circular ring noise elimination walls 703 is 2-200 mm;

as shown in fig. 30 and fig. 31, the number of the second annular silencing walls 803 is 2 to 5, the wall thickness of each second annular silencing wall 803 is 0.2 to 40mm, the second silencing ventilation through holes 8031 formed in each second annular silencing wall 803 are square holes or circular holes, the aperture size of the second silencing ventilation through holes 8031 is 0.02 to 40mm, and the ratio of the total area of the second silencing ventilation through holes 8031 formed in each second annular silencing wall 803 to the area of the annular wall is 2 to 25%; the distance between two adjacent layers of second circular ring sound attenuation walls 803 is 2-200 mm.

Alternatively, the outer edge of the stator 30 close to the upper sealing cover 10 is provided with an oval first sealing step 308 (as shown in fig. 6, 7 and 8), the outer edge of the stator 30 close to the lower sealing cover 60 is provided with an oval second sealing step 309 (as shown in fig. 9 and 10), the side of the upper sealing cover 10 close to the stator 30 is provided with an oval first snap-back cover 104 (as shown in fig. 23), and the side of the lower sealing cover 60 close to the stator 30 is provided with an oval second snap-back cover 606 (as shown in fig. 25);

the external dimension of the elliptical first sealing step 308 of the stator 30 is the same as the shape and dimension of the inner hole of the elliptical first snap-back cover 104 of the upper sealing cover 10; the elliptical first sealing step 308 of the stator 30 is matched with the elliptical first snap-back cover 104 of the upper sealing cover 10 to seal the upper end of the pump body 100; between the stator 30 and the upper sealing cover 10, the stator 30 and the upper sealing cover 10 cannot rotate through the elliptical shape of the elliptical first sealing step 308 and the elliptical first snap-back cover 104;

the external dimension of the elliptical second sealing step 309 of the stator 30 is the same as the internal dimension of the elliptical second snap-back cover 606 of the lower sealing cover 60; the elliptical second sealing step 309 of the stator 30 is matched with the elliptical second snap-back cover 606 of the lower sealing cover 60 to seal the lower end of the pump body 100; between the stator 30 and the lower sealing cover 60, the stator 30 and the lower sealing cover 60 cannot rotate through the elliptical shape of the elliptical second sealing step 309 and the elliptical second snap-back cover 606, which are self-positioned;

the upper sealing cover 10, the upper porous muffler 70, the upper cover plate 20 and the upper surface of the stator 30 are provided with corresponding first screw holes 128 (as shown in fig. 3, 4, 5, 6, 15, 20, 21, 22 and 23);

the lower sealing cover 60, the lower porous muffler 80, the lower cover plate 50 and the lower surface of the stator 30 are provided with corresponding second screw holes 129 (as shown in fig. 9, 10, 17, 18, 24, 25 and 27).

Optionally, the rotor shaft 40 is connected with a rotating shaft of the motor 300 through a coupling 400, the rotor shaft 40 is of a stepped shaft structure, a rotor part is arranged at the position with the largest diameter of the middle section of the rotor shaft 40, and the rotor part is provided with a plurality of through rotor plate slots 401 uniformly distributed along the circumference; the length of the rotor part along the axial direction is equal to the length of the stator 30 along the axial direction, the diameter of the rotor part is equal to the length of the minor axis of the elliptical cavity 301, and the diameter of the shaft at the two ends of the rotor shaft 40 is equal to the diameter of the central hole of the bearing;

the upper part of the rotor shaft 40 is respectively and sequentially provided with an upper cover plate 20, an upper porous silencer 70, an upper sealing cover 10 and a bearing; the stator 30 is sleeved outside the rotor part of the rotor shaft 40; the lower part of the rotor shaft 40 is respectively and sequentially provided with a lower cover plate 50, a lower porous muffler 80, a lower sealing cover 60 and a bearing.

Alternatively, the number of the rotor slots 401 is the same as that of the rotor 4011, and the number of the rotor slots 401 is one of five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty-one, twenty-two, twenty-three, twenty-four, twenty-five, twenty-six, twenty-seven, or twenty-eight.

Alternatively, the elliptical shape of the elliptical cavity 301 is expressed by any one of an elliptic function curve equation, an involute function curve equation, a logarithmic spiral equation or a sinusoidal spiral function curve equation.

According to the technical scheme, the utility model provides a built-in porous silencer rotor electronic air pump, which comprises a pump body 100, a connecting seat and a motor; the pump body 100 comprises an upper sealing cover, an upper porous silencer, an upper cover plate, a stator, a rotor shaft, a lower cover plate, a lower porous silencer and a lower sealing cover, wherein a plurality of rotor plate grooves which are uniformly distributed along the circumference are formed in the rotor shaft; the stator is provided with an air inlet nozzle hole, an air outlet nozzle, a through air inlet hole and a through air outlet hole; the upper cover plate and the lower cover plate are respectively provided with 2 non-through air inlets, 2 through air outlets, 1 through air outlet and 1 semi-elliptical non-through annular groove; the upper sealing cover and the lower sealing cover are both provided with a reactive silencing expansion air cavity, an upper porous silencer and a lower porous silencer are respectively arranged in the upper sealing cover and the lower sealing cover, and the upper porous silencer and the lower porous silencer are both of porous structures with multilayer circular walls; the pump body 100 and its components are oval, which is beneficial to the weight reduction, noise reduction and heat dissipation of the air pump.

The above is only a specific embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. The electronic air pump with the built-in porous silencer rotor is characterized by comprising a pump body (100), a connecting seat (200) and a motor (300), wherein the pump body (100) is connected with the motor (300) through the connecting seat (200); the pump body (100) is oval;

the pump body (100) comprises an upper sealing cover (10), an upper porous silencer (70), an upper cover plate (20), a stator (30), a rotor shaft (40), a lower cover plate (50), a lower porous silencer (80) and a lower sealing cover (60), wherein a plurality of spiral piece grooves (401) which are uniformly distributed along the circumference are formed in the rotor shaft (40), spiral pieces (4011) are arranged in the spiral piece grooves (401), an elliptical cavity (301) is formed in the stator (30), the rotor shaft (40) is concentrically arranged in the elliptical cavity (301) of the stator (30), the outer diameter of the rotor shaft (40) is equal to the minor axis length of the elliptical cavity (301), a gap between the stator (30) and the rotor shaft (40) forms two sections of symmetrical pump cavities (90), one end of each spiral piece (4011) is located in the spiral piece groove (401), the other end of each spiral piece (4011) is abutted to the inner wall of the elliptical cavity (301), every two adjacent rotor blades (4011) are mutually matched with the rotor shaft (40) and the stator (30) to form a subunit of a variable volume air cavity;

the upper sealing cover (10), the upper porous silencer (70), the upper cover plate (20), the stator (30) provided with the rotor shaft (40), the lower cover plate (50), the lower porous silencer (80) and the lower sealing cover (60) are sequentially connected from top to bottom, the lower sealing cover (60) is connected with the connecting seat (200), and the upper sealing cover (10) and the lower sealing cover (60) seal the pump body (100); the shapes of the upper sealing cover (10), the upper cover plate (20), the stator (30), the lower cover plate (50) and the lower sealing cover (60) are all oval; when a product is assembled and works, the upper sealing cover (10), the upper cover plate (20), the stator (30), the lower cover plate (50) and the lower sealing cover (60) are self-positioned mutually through oval shapes, and the upper sealing cover (10), the upper cover plate (20), the stator (30), the lower cover plate (50) and the lower sealing cover (60) cannot rotate mutually to ensure positioning accuracy and assembling and matching accuracy;

the stator (30) is provided with an air inlet nozzle hole (302), an air outlet nozzle hole (303), a through air inlet hole (304) and a through air outlet hole (305);

the upper cover plate (20) is provided with two non-through upper air inlets (201), two through upper air outlets (202), a through upper air outlet (203) and an upper non-through semi-elliptical ring groove (204), and the upper non-through semi-elliptical ring groove (204) is connected with the two non-through upper air inlets (201);

the lower cover plate (50) is provided with two non-through lower air inlets (501), two through lower air outlets (502), a through lower air outlet (503) and a lower non-through semi-elliptical ring groove (504), and the lower non-through semi-elliptical ring groove (504) is connected with the two non-through lower air inlets (501);

the upper sealing cover (10) is provided with a first resistant silencing expansion air cavity (101) for dissipating heat and silencing the circulated compressed high-speed air flow, and an upper porous silencer (70) is arranged in the first resistant silencing expansion air cavity (101);

the lower sealing cover (60) is provided with a second reactive noise elimination expansion air cavity (601) for dissipating heat and eliminating noise of the compressed high-speed airflow which flows through, and a lower porous silencer (80) is arranged in the second reactive noise elimination expansion air cavity (601);

the upper porous silencer (70) is provided with two first air inlets (701), a third resistant silencing expansion air cavity (702) positioned in the center and a multi-layer first annular silencing wall (703), and the upper porous silencer (70) silences two paths of air flows flowing out of two penetrating upper air outlets (202) of the upper cover plate (20);

the lower porous silencer (80) is provided with two second air inlets (801), a fourth resistant silencing expansion air cavity (802) located in the center and a multi-layer second annular silencing wall (803), and the lower porous silencer (80) silences two paths of air flows flowing out of the lower air outlet (502) of the lower cover plate (50) in a penetrating mode;

the air inlet nozzle hole (302) is directly communicated with the through air inlet hole (304), and the through air inlet hole (304) is indirectly communicated with the two non-through upper air inlet holes (201); the through air inlet hole (304) is indirectly communicated with the two non-through lower air inlets (501) to form four paths of inlet air flow;

the air outlet nozzle hole (303) is communicated with the through air outlet hole (305), and the through air outlet hole (305) is communicated with the through upper air outlet hole (203) and the through lower air outlet hole (503); the through upper air outlet (203) is communicated with the first resistant silencing expansion air cavity (101), and the through lower air outlet (503) is communicated with the second resistant silencing expansion air cavity (601), so that four paths of outlet air flow after silencing treatment are formed.

2. The rotary vane electric air pump of the built-in porous muffler as defined in claim 1, wherein the upper seal cover (10) is provided with a first shaft hole (102), the upper porous muffler (70) is provided with a second shaft hole (704), the upper cover plate (20) is provided with a third shaft hole (205), the upper end surface of the upper seal cover (10) is provided with a first bearing mounting ring (103), the first bearing mounting ring (103) is communicated with the second shaft hole (704) and the third shaft hole (205), and a bearing is mounted in the first bearing mounting ring (103);

the first resistant silencing expansion air cavity (101) is arranged in the center of the lower surface of the upper sealing cover (10), the first resistant silencing expansion air cavity (101) carries out resistant silencing on inflow high-speed air flow, and the first resistant silencing expansion air cavity (101) also carries out heat dissipation on two paths of high-temperature air flowing through;

the two non-through upper air inlets (201) of the upper cover plate (20) are communicated with the pump cavity (90), the two non-through upper air inlets (201) of the upper cover plate (20) are communicated with each other through an upper non-through semi-elliptical ring groove (204) of the upper cover plate (20), and the upper non-through semi-elliptical ring groove (204) of the upper cover plate (20) is communicated with a through air inlet (304) of the stator (30);

the two through upper air outlets (202) of the upper cover plate (20) are communicated with the pump cavity (90), the two through upper air outlets (202) are communicated with the two first air inlets (701) of the upper porous silencer (70), and the upper cover plate (20) is arranged on the lower surface of the upper sealing cover (10);

the upper cover plate (20) and the upper sealing cover (10) are self-positioned through an oval structure, the upper cover plate (20) and the upper sealing cover (10) are directly assembled, and the upper cover plate (20) and the upper sealing cover (10) cannot rotate.

3. The rotary vane electric air pump of the built-in porous muffler as recited in claim 2, wherein the lower sealing cover (60) is provided with a fourth shaft hole (602), the lower porous muffler (80) is provided with a fifth shaft hole (804), the lower cover plate (50) is provided with a sixth shaft hole (505), the lower end surface of the lower sealing cover (60) is provided with a fourth bearing mounting ring (603), the fourth bearing mounting ring (603) is communicated with the fifth shaft hole (804) and the sixth shaft hole (505), and a bearing is mounted in the fourth bearing mounting ring (603);

the second reactive noise elimination expansion air cavity (601) is arranged at the center of the upper surface of the lower sealing cover (60), the second reactive noise elimination expansion air cavity (601) performs reactive noise elimination on inflow high-speed air flow, and the second reactive noise elimination expansion air cavity (601) also dissipates heat of two paths of high-temperature air passing through;

the two non-through lower air inlets (501) of the lower cover plate (50) are communicated with the pump cavity (90), the two non-through lower air inlets (501) of the lower cover plate (50) are communicated with each other through a lower non-through semi-elliptical ring groove (504) of the lower cover plate (50), and the lower non-through semi-elliptical ring groove (504) of the lower cover plate (50) is communicated with a through air inlet (304) of the stator (30); the two lower through air outlets (502) of the lower cover plate (50) are communicated with the pump cavity (90), and the two lower through air outlets (502) are communicated with the two second air inlets (801) of the lower porous silencer (80); the lower cover plate (50) is arranged on the upper surface of the lower sealing cover (60);

the maximum outline of the lower sealing cover (60) is provided with four mounting earrings (604), and the mounting earrings (604) connect the pump body (100) with the connecting seat (200); the lower surface of the lower sealing cover (60) is provided with a circular ring matching step (605), the outer diameter of the circular ring matching step (605) is equal to the inner diameter of an inner hole at the upper surface of the connecting seat (200), and the outer diameter of the circular ring matching step (605) is matched with the inner diameter of the inner hole at the upper surface of the connecting seat (200) so as to ensure the concentricity of the rotor shaft (40) and a motor shaft of the motor (300);

the connecting seat (200) is of a cuboid structure with a hollow-out part penetrating through the inside, the diameter of an inner hole at the lower surface of the connecting seat (200) is equal to the outer diameter of a motor (300) flange, and the diameter of the inner hole at the lower surface of the connecting seat (200) is matched with the outer diameter of the motor (300) flange, so that the concentricity of the rotor shaft (40) and the motor shaft of the motor (300) is ensured;

the lower cover plate (50) and the lower sealing cover (60) are self-positioned through an oval structure, the lower cover plate (50) and the lower sealing cover (60) are directly assembled, and the lower cover plate (50) and the lower sealing cover (60) cannot rotate.

4. The rotary vane electronic air pump of the built-in porous muffler is characterized in that the stator (30) is provided with one air inlet nozzle hole (302), one air outlet nozzle hole (303), one through air inlet hole (304) and one through air outlet hole (305), and the air inlet nozzle hole (302) and the air outlet nozzle hole (303) are arranged on the outer wall of the stator (30);

the air inlet nozzle hole (302) is communicated with the through air inlet hole (304), the through air inlet hole (304) is communicated with the upper non-through semi-elliptical ring groove (204), and the through air inlet hole (304) is also communicated with the lower non-through semi-elliptical ring groove (504) to form four air inlet airflow channels;

the air outlet nozzle hole (303) is communicated with the through air outlet hole (305), and the through air outlet hole (305) is respectively communicated with the through upper air outlet hole (203) of the upper cover plate (20) and the through lower air outlet hole (503) of the lower cover plate (50); the two through upper air outlets (202) of the upper cover plate (20) are communicated with the two first air inlets (701) of the upper porous silencer (70), and the two through lower air outlets (502) of the lower cover plate (50) are communicated with the two second air inlets (801) of the lower porous silencer (80); the through upper air outlet (203) of the upper cover plate (20) is communicated with the first resistant silencing expansion air cavity (101), and the through lower air outlet (503) of the lower cover plate (50) is communicated with the second resistant silencing expansion air cavity (601) to form four silencing air outlet air flow channels;

the outer wall of the stator (30) is provided with a heat dissipation groove (306) and a heat dissipation edge (307).

5. The built-in porous muffler rotor electronic air suction pump according to claim 1, wherein the built-in upper porous muffler (70) and the built-in lower porous muffler (80) of the built-in porous muffler rotor electronic air suction pump are identical in shape and are of multilayer circular wall structures, the built-in upper porous muffler (70) is located in the elliptical first reactive noise elimination expansion air cavity (101), and the built-in lower porous muffler (80) is located in the elliptical second reactive noise elimination expansion air cavity (601);

each layer of the first annular silencing wall (703) is provided with a plurality of first silencing ventilation through holes (7031);

each layer of second annular silencing wall (803) is provided with a plurality of second silencing ventilation through holes (8031);

the number of the first annular silencing wall (703) is 2-5, the wall thickness of each first annular silencing wall (703) is 0.2-40mm, the first silencing ventilation through hole (7031) formed in each first annular silencing wall (703) is a square hole or a round hole, the aperture size of the first silencing ventilation through hole (7031) is 0.02-40mm, and the ratio of the total area of the first silencing ventilation through holes (7031) formed in each first annular silencing wall (703) to the area of the annular wall is 2-25%; the distance between two adjacent layers of first circular ring noise elimination walls (703) is 2-200 mm;

the number of the second circular ring silencing walls (803) is 2-5, the wall thickness of each second circular ring silencing wall (803) is 0.2-40mm, the second silencing ventilation through holes (8031) formed in each second circular ring silencing wall (803) are square holes or round holes, the aperture size of the second silencing ventilation through holes (8031) is 0.02-40mm, and the ratio of the total area of the second silencing ventilation through holes (8031) formed in each second circular ring silencing wall (803) to the area of the circular ring wall is 2-25%; the distance between two adjacent layers of second circular ring sound attenuation walls (803) is 2-200 mm.

6. The rotary vane electric air pump of the built-in porous muffler is characterized in that the outer edge of one side of the stator (30) close to the upper sealing cover (10) is provided with an oval first sealing step (308), the outer edge of one side of the stator (30) close to the lower sealing cover (60) is provided with an oval second sealing step (309), one side of the upper sealing cover (10) close to the stator (30) is provided with an oval first snap-back cover (104), and one side of the lower sealing cover (60) close to the stator (30) is provided with an oval second snap-back cover (606);

the external dimension of the elliptical first sealing step (308) of the stator (30) is the same as the shape and the dimension of the inner hole of the elliptical first snap-back cover (104) of the upper sealing cover (10); the elliptical first sealing step (308) of the stator (30) is matched with the elliptical first snap-back cover (104) of the upper sealing cover (10) to seal the upper end of the pump body (100); between the stator (30) and the upper sealing cover (10), the stator (30) and the upper sealing cover (10) cannot rotate through the self-positioning of the oval first sealing step (308) and the oval outer shape of the oval first snap-back cover (104);

the external dimension of the elliptical second sealing step (309) of the stator (30) is the same as the shape and the dimension of the inner hole of the elliptical second snap-back cover (606) of the lower sealing cover (60); the elliptical second sealing step (309) of the stator (30) is matched with the elliptical second snap-back cover (606) of the lower sealing cover (60) to seal the lower end of the pump body (100); between the stator (30) and the lower sealing cover (60), the stator (30) and the lower sealing cover (60) cannot rotate through the self-positioning of the oval second sealing step (309) and the oval outer shape of the oval second snap-back cover (606);

the upper sealing cover (10), the upper porous silencer (70), the upper cover plate (20) and the upper surface of the stator (30) are provided with corresponding first screw holes (128);

the lower sealing cover (60), the lower porous silencer (80), the lower cover plate (50) and the lower surface of the stator (30) are provided with corresponding second screw holes (129).

7. The electronic air suction pump with the built-in porous muffler rotor plate as claimed in claim 3, wherein the rotor shaft (40) is connected with the rotating shaft of the motor (300) through a coupling (400), the rotor shaft (40) is of a stepped shaft structure, the position with the largest diameter at the middle section of the rotor shaft (40) is a rotor part, and the rotor part is provided with a plurality of through rotor plate slots (401) which are uniformly distributed along the circumference; the length of the rotor part along the axial direction is equal to the length of the stator (30) along the axial direction, the diameter of the rotor part is equal to the length of the short axis of the oval cavity (301), and the diameter of the shaft at the two ends of the rotor shaft (40) is equal to the diameter of the central hole of the bearing;

the upper part of the rotor shaft (40) is respectively and sequentially provided with an upper cover plate (20), an upper porous silencer (70), an upper sealing cover (10) and a bearing; a stator (30) is sleeved outside a rotor part of the rotor shaft (40); the lower part of the rotor shaft (40) is respectively and sequentially provided with a lower cover plate (50), a lower porous silencer (80), a lower sealing cover (60) and a bearing.

8. The internal porous muffler rotor electronic air pump according to claim 1, wherein the number of the rotor slots (401) is the same as the number of the rotors (4011), and the number of the rotor slots (401) is one of five, six, seven, eight, nine, ten, eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty-one, twenty-two, twenty-three, twenty-four, twenty-five, twenty-six, twenty-seven, or twenty-eight.

9. The rotary vane electric suction pump of the built-in porous muffler as set forth in claim 1, characterized in that the elliptical shape of the elliptical cavity (301) is expressed by any one of an elliptic function curve equation, an involute function curve equation, a logarithmic spiral equation or a sinusoidal spiral function curve equation.

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