CN203604215U

CN203604215U - Alternating-current permanent magnet drainage pump

Info

Publication number: CN203604215U
Application number: CN201320745113.5U
Authority: CN
Inventors: 王红标; 李昌建; 徐飞
Original assignee: Jangmen Idear Hanyu Electrical Joint Stock Co ltd
Current assignee: Hanyu Group JSCL
Priority date: 2012-12-12
Filing date: 2013-11-22
Publication date: 2014-05-21
Anticipated expiration: 2023-11-22

Abstract

The utility model discloses an alternating-current permanent magnet drainage pump. The alternating-current permanent magnet drainage pump comprises a pump body, a pump cover, an impeller, a stator component and a rotor component, wherein the stator component comprises a stator coil and a stator iron core, the rotor component comprises a rotor shaft, a magnetic core arranged on the rotor shaft in a penetrating mode, a shaft sleeve fixed to the rotor shaft, and at least one limiting rib which is arranged on the outer wall of the shaft sleeve, the stator component and the rotor component are installed in the pump body, a rotor base used for supporting the rotor component is arranged inside the pump body, an concave arc-shaped part of the stator iron core is embedded in the rotor base, the rotor component further comprises a starting mechanism which is used for driving the rotor shaft to rotate when the magnetic core rotates and comprises a starting sleeve fixedly installed at one end of the magnetic core, and the starting sleeve is made of non-magnetic materials. According to the alternating-current permanent magnet drainage pump, a magnetic circuit air gap between the stator core and the magnetic core is small, the utilization rate of products is high, the structural size is small, the noise is low during work, the cooling effect is good, the staring torque of the starting mechanism is large, and starting is stable.

Description

AC permanent-magnet draining pump

Technical field

The utility model relates to liquor pump technical field, relates in particular to a kind of AC permanent-magnet draining pump.

Background technique

At present, U-shaped AC permanent magnet synchronous motor is often applied to draining pump, and therefore this draining pump is also often called AC permanent-magnet draining pump.This draining pump is mainly used on washing machine, dishwasher.Because this draining pump has low voltage starting difficulty, thereby limit electromagnetism utilization ratio, made the whole efficiency of product low.On the other hand, in recent years, along with improving constantly of the aggravation of the increasing of manufacturer, market competition, customer requirement, the cost pressure of this product is also constantly highlighting, and Noise and vibration problem also needs continuous improvement.

In operation, between coil and stator iron core, can there is vibration, collide with each other, thereby produce noise in existing U-shaped AC permanent-magnet draining pump.On the other hand, owing to having rotor drum between stator iron core and rotor, the thickness of rotor drum itself and and stator iron core and rotor between desired reasonable clearance all can cause the increase of distance between stator iron core and rotor, increase air gap, affect working efficiency, also increased the size of the pump housing, this is the impact of can not ignore for micropump.

As shown in Figure 1, be the pump shell structure of existing U-shaped AC permanent magnet synchronous motor, this pump comprises a rotor drum 9 ' cylindraceous as seen from the figure, core assembly is positioned over rotor drum inner chamber.Rotor drum is adopted made of plastic conventionally, and thickness reaches 1mm.Due to the existence of rotor drum, increase the air gap between stator iron core and rotor magnetic core.

Fig. 1 a, Fig. 1 b shows the AC permanent-magnet draining pump of available technology adopting, it packs the coil of making 7 ' into plastic package die and carries out injection process to form coil plastic packaging 5 ', the patent No. of coil 7 ' being carried out in process and the Chinese invention patent of injection process is 200710143209.3, denomination of invention is identical for stator coil being carried out to the process of injection process in the patent of " permanent magnetic synchronization motor for water discharge pump ", forming after coil plastic packaging 5 ', stator iron core 8 ' is assemblied in coil plastic packaging 5 ', then by the indent circular arc part of stator iron core 8 ' being sleeved on by concaved circular cambered surface in it on exterior arc surface of wall of the rotator seat 17 ' of the pump housing 10 ', and make coil plastic packaging 5 ' fit in one by buckle 18 ' and the pump housing 10 '.

But, above-mentioned AC permanent-magnet draining pump also has following shortcoming: first, because stator iron core 8 ' is sleeved on the outer wall of rotator seat 17 ', the wall that makes to have rotator seat 17 ' between stator iron core 8 ' and magnetic core 15 ' is separated by, and (rotator seat 17 ' is due to the requirement of intensity conventionally, its thickness is at least 1mm), therefore increased the inner arc surface of stator iron core 8 ' to the distance (being at least 1.5mm) between the magnetic core 15 ' of rotor, cause magnetic air gap larger, therefore magnetic resistance is larger, and electromagnetic efficiency is lower; The second, between stator iron core 8 ' and rotator seat 17 ', between stator iron core and coil plastic packaging 5 ' and all gapped between coil plastic packaging 5 ' and the pump housing 10 ', while therefore work, can be because vibration produces noise between each component; The 3rd, the heat radiation of stator iron core 8 ' only relies on air radiation and carries out heat conduction to the rotator seat of the pump housing 10 ', and therefore heat dissipation potential is poor.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, a kind of AC permanent-magnet draining pump is provided, it reduces the magnetic air gap between stator iron core and the magnetic core of rotor assembly, improves the electromagnetic efficiency of product, reduces the physical dimension of the pump housing, reduce the manufacture cost of draining pump, reduce vibrations and the noise of product, improve heat dispersion, in addition, tripping force while improving electric motor starting, makes to start steadily.

For realizing above-mentioned purpose of the present utility model, a kind of AC permanent-magnet draining pump that reduces vibrating noise of the present utility model, comprise the pump housing, connect the pump cover of the pump housing, be placed in the impeller in pump cover, magnetic core, run through the rotating shaft of the axis hole of magnetic core, stator iron core and coil, coil winding is in coil rack, stator iron core is assemblied in coil, the wherein said pump housing be around assembling after coil, the housing that the profile integrated injection molding of coil rack and stator iron core forms, described housing limits one and is opened on top and extends to the magnetic core containing space for accommodating magnetic core at pump housing center from opening, the open top of magnetic core containing space is provided with the supporting structure for supporting revolving shaft bearing.

Particularly, comprise the stator module of coil and stator iron core and comprise rotating shaft, within the rotor assembly of being located at the magnetic core in rotating shaft is placed in the pump housing; Rotor assembly also comprises at least one limit rib that is fixed on the axle sleeve in rotating shaft and is located at axle sleeve outer wall; In the pump housing, be provided with the rotator seat for supporting described rotor assembly, magnetic core containing space is surrounded by the internal surface of rotator seat; The indent circular arc part of stator iron core embeds in rotator seat.

Wherein, the described pump housing comprises the first pump housing portion of sealed stator coil at least and for the second pump housing portion of rotor assembly is installed, and the first pump housing portion and the second pump housing portion connect as one.

Wherein, described rotator seat is arranged in the second pump housing portion and is structure as a whole with it, and the outer rim of described the second pump housing portion is provided with the joint for connecting described pump cover.

Wherein, described coil is placed in described the first pump housing portion, and the indent circular arc part of described stator iron core stretches out in the first pump housing portion.

Wherein, described rotator seat is the cylindrical shell of an end opening, and the interior arc-shaped surface of the indent circular arc part of the interior arc-shaped surface of cylindrical shell and the stator iron core of embedding surrounds the magnetic core holding space that holds magnetic core jointly.

Wherein, the interior arc-shaped surface of the indent circular arc part of described stator iron core is configured to a part for the interior arc-shaped surface of described rotator seat.

Preferably, the internal surface that protrudes at least partly described rotator seat to axis direction of the interior arc-shaped surface of the indent circular arc part of described stator iron core.

Preferably, in the part of the indent circular arc part of described stator iron core, arc-shaped surface and rotator seat internal surface surround the magnetic core holding space that holds described magnetic core jointly.

Preferably, the whole interior arc-shaped surface of the indent circular arc part of described stator iron core with jointly surround with rotator seat internal surface the magnetic core holding space that holds described magnetic core.

Particularly, the part except the interior arc-shaped surface of indent circular arc part of described stator iron core is surrounded by described pump housing sealing.

Wherein, described rotor assembly also comprises: starting mechanism, magnetic core rotates by starting mechanism drive shaft, its have the startup fixing with magnetic core one end cover and with the fixing axle sleeve of rotating shaft, start between cover and axle sleeve and contact by shock reducing structure.

Particularly, axle sleeve is placed in and starts in cover, and its outer wall is provided with at least one limit rib; Start cover inwall and be provided with at least one startup muscle; Start between muscle and limit rib and contact by shock reducing structure, start between muscle and described limit rib and have anti-interference gap, when this anti-interference gap makes to start, starting muscle is at least 220 ° in the maximum idle running angle that contacts shock reducing structure, contact and promote before limit rib.

Preferably, described the first pump housing portion and described the second pump housing portion are single injection-molded or secondary injection molding.

Preferably, between the indent circular arc part of magnetic core and stator iron core, there is running clearance.

Preferably, running clearance is 0.5mm.

In addition, in the second pump housing portion, be also provided with the waterway that is surrounded on rotator seat outer wall and an end opening.

Accordingly, a gland is installed between pump cover and the pump housing, for opening one end of waterway is sealed.

Preferably, stator iron core is through transpassivation and electrophoretic process.

Particularly, one end of rotator seat sealing is provided with bearing support.

Wherein, starting mechanism be placed in magnetic core away from one end of impeller or magnetic core the one end near impeller.

Preferably, starting mechanism is placed in magnetic core one end away from impeller.

Preferably, the inner chamber that starts cover is divided into the first and second regions by two startup muscle, is mounted with the first shock reducing structure in first area, is mounted with the second shock reducing structure in second area; Start between muscle and limit rib and there is anti-interference gap, can turn over a limit rib in two limit ribs so that one of them starts muscle, and another startup muscle can turn over another limit rib in two limit ribs.

Wherein, two sidewalls that start muscle have respectively the first indent arc shaped surface, and two sidewalls of described limit rib have respectively the second indent arc shaped surface, and described the first indent arc shaped surface and the first indent arc shaped surface are for coordinating with described the first shock reducing structure and the second shock reducing structure.

Wherein, the first indent arc shaped surface is identical with the radius of curvature of the second indent arc shaped surface; Wherein, between the first indent arc shaped surface and its corresponding the second indent arc shaped surface, form the non-closed space of accommodating the first shock reducing structure and the second shock reducing structure.

Particularly, the first shock reducing structure is cylindrical body or the spheroid that structure is identical with the second shock reducing structure, and its radius is less than the radius of curvature of the first indent arc shaped surface.

Particularly, anti-interference gap is formed at and starts between the inwall of muscle and the outer wall of limit rib.

Particularly, the distance between the tubular body outer wall of axle sleeve and startup muscle inwall is less than the diameter of shock reducing structure, and the distance of startup cover inwall and limit rib outer wall is less than the diameter of shock reducing structure.

Particularly, two limit ribs are two outwardly portions that are symmetrically set in the tubular body outer wall of axle sleeve.

Particularly, two start muscle be symmetrically set in start cover inwall and along start cover radially to two projecting inward bumps.

Preferably, start cover inwall and be provided with a startup muscle, axle sleeve outer wall is provided with a limit rib, in the cavity starting between muscle and limit rib, is mounted with shock reducing structure, starts the gap between muscle and limit rib with anti-interference.

Start between muscle inwall and limit rib outer wall and form anti-interference gap.

Particularly, in the time forming anti-interference gap between startup muscle inwall and limit rib outer wall, start the cavity forming between muscle and limit rib and be integrated fan-shaped chamber, shock reducing structure is positioned at fan-shaped chamber.

Particularly, shock reducing structure is quadrant, and the outer fan-shaped wall radius of shock reducing structure is greater than the inwall radius that starts muscle, and the interior fan-shaped wall radius of shock reducing structure is less than limit rib exterior radius.

Particularly, the tubular body outer wall of axle sleeve and start inside and outside fan-shaped wall radius poor that distance between muscle inwall is less than the first shock reducing structure.

Particularly, the height of startup muscle and shock reducing structure is not more than the height of limit rib.

Particularly, the tubular body outer end of axle sleeve is equipped with outwardly platform, and the bottom of platform is connected with the top of limit rib.

Particularly, limit rib is located at the tubular body outer wall of axle sleeve, and one-body molded with tubular body, platform.

Particularly, starting muscle overlaps one-body molded with startup.

Particularly, starting cover is made by plastic material.

Particularly, the described pump housing comprises around the coil after assembling and the external frame of stator iron core and the frame being shaped and the inner housing as magnetic core containing space that is positioned at frame lumen centers, described stator iron core is U-shaped stator iron core, its both arms run through inner housing shell wall and are folded in magnetic core both sides, between U-shaped stator iron core both arms and magnetic core, leave running clearance.Owing to separating without rotor drum between U-shaped stator iron core and magnetic core, thereby can the gap between stator iron core and magnetic core be done littlely.

The described AC permanent-magnet draining pump that reduces vibrating noise also comprises a stainless steel rotor drum, stainless steel rotor drum inner chamber is settled magnetic core, stainless steel rotor drum is placed in described magnetic core containing space, and described stator iron core is U-shaped stator iron core, and its both arms are folded in stainless steel rotor drum both sides.Because stainless thickness can do very thinly, in the time adopting stainless steel rotor drum, the gap between stator iron core and magnetic core thereby reduce.

The described pump housing also comprises a waterway for accommodating cooling water, can certainly not want waterway, the external frame at the position of waterway based on U-shaped stator iron core two arms and magnetic core interference and the annulus that is shaped.Waterway is close to outside stator iron core, and the heat that in work, stator iron core produces is reached rapidly to the cooling liquid in waterway, reaches the object of motor radiating cooling, effectively reduces the temperature rise of pump motor.

Described shaft bearing is tightly connected by the supporting structure of bearing sealed ring and shaft bearing.

Described pump cover and the pump housing are assembled together and with the seal ring position that is tightly connected, prevent that the water in pump cover from flowing in the pump housing.

The described pump housing is integrated the housing that forms the bottom lock that is moulded shape.

Described pump housing bottom-open, is sealed and is adopted seal ring sealing to connect by a bonnet.

Compared with prior art, AC permanent-magnet draining pump of the present utility model has advantages of following outstanding:

1) the utility model adopts stator module and rotor assembly is settled to the pump housing in it, has therefore simplified the structure of the pump housing, has reduced the physical dimension of the pump housing, and has been convenient to Product Assembly and maintenance;

2) in the pump housing of the present utility model, the first pump housing portion and the second pump housing portion are formed by utilizing plastic package die to carry out injection process to stator coil and stator iron core, therefore avoided the pump housing resonate and reduce noise, and be conducive to stator iron core and dispel the heat by the conduction of pump housing heat, improved radiating efficiency;

3) the utility model is embedded in the rotator seat of the second pump housing portion by the indent circular arc part of stator iron core, make the common formation of interior arc-shaped surface of the interior arc-shaped surface of cylindrical shell and the indent circular arc part of stator iron core hold the inner chamber of rotor assembly, between stator iron core and magnetic core, do not have wall thickness to be at least the isolation of the rotator seat of 1mm, therefore reduced the magnetic air gap between stator iron core and the magnetic core of rotor assembly, reduce magnetic resistance, improve electromagnetic efficiency, with respect to the draining pump of existing structure, adopt the silicon steel plate of less amount, enameled cable and shorter magnetic core can reach identical usability, reduce the cost of production of draining pump,

4) the indent circular arc part of stator iron core of the present utility model is embedded in the rotator seat of the second pump housing portion, and therefore stator iron core can contact with the liquid in rotator seat, is beneficial to the heat producing when stator iron core is worked and leaves fast;

5) part except indent circular arc part of stator iron core of the present utility model is surrounded by the first pump housing portion and the second pump housing portion, has therefore avoided the generation of rotator seat water leakage phenomenon;

6) rotator seat of the present utility model is equipped with waterway outward, and the heat that in working procedure, stator iron core produces can be passed to rapidly the liquid in waterway, accelerates stator iron core heat radiation, extends the life-span of draining pump;

7) stator iron core of the present utility model, through transpassivation and electrophoretic process, can effectively prevent that stator iron core from getting rusty, and stator coil is surrounded by the first pump housing portion, therefore can prevent stator coil ingress of air;

8) startup cover of the present utility model is made up of nonmagnetic substance, reduce production costs, and be mounted with shock reducing structure between the startup muscle in startup cover and the limit rib of axle sleeve, start between muscle and limit rib and contact by shock reducing structure, therefore stress surface is large, starts muscle little to the impact force of limit rib, good damping effect, the operational noise of draining pump is little, makes startup more steady, the long service life of starting mechanism;

9) when magnetic core of the present utility model rotates, owing to starting the design in anti-interference gap between the startup muscle of cover and the limit rib of axle sleeve, in start-up course, the idle running stroke that starts muscle has reached more than 220 °, even reach 270 °, to such an extent as to starting torque in the time of starting mechanism coupling impeller increases greatly, be conducive to starting mechanism and start vane rotary, start more steady, rotor assembly long service life;

10) startup cover, axle sleeve and the shock reducing structure of starting mechanism of the present utility model are placed in the one end away from impeller, can make magnetic core near impeller, stator iron core is also just near impeller, optimize the structure of the pump housing: on the one hand, because starting mechanism is not arranged in impeller, not only the length of the blade of impeller can increase, and the area that impeller is clapped water increases, and is also convenient to installation and the manufacture of impeller; On the other hand, because stator iron core is near impeller, make whole pump structure compact.

Below in conjunction with accompanying drawing, the utility model is elaborated.

Accompanying drawing explanation

Fig. 1 is the pump shell structure schematic diagram of existing U-shaped AC permanent magnet synchronous motor;

Fig. 1 a is the structural representation in prior art with the AC permanent-magnet draining pump of rotator seat 17 ';

Fig. 1 b is that the E-E shown in Fig. 1 a is to sectional view;

Fig. 2 is the three-dimensional sectional view of the utility model AC permanent-magnet draining pump embodiment 1 internal structure;

Fig. 3 is embodiment's 1 section of structure of the utility model AC permanent-magnet draining pump;

Fig. 3 a is that the M-M of the draining pump of AC permanent-magnet shown in Fig. 3 is to sectional view;

Fig. 4 is the three-dimensional sectional view of embodiment's 2 internal structures of the utility model AC permanent-magnet draining pump;

Fig. 5 is embodiment's 2 structure sectional views of the utility model AC permanent-magnet draining pump;

Fig. 6 is the utility model AC permanent-magnet draining pump embodiment 3 perspective view;

Fig. 7 is the left side view of AC permanent-magnet draining pump shown in Fig. 6;

Fig. 8 is the partial sectional view of the AC permanent-magnet draining pump shown in Fig. 6;

Fig. 9 is that the A-A of the AC permanent-magnet draining pump shown in Fig. 6 is to sectional view;

Figure 10 is that the B-B of the AC permanent-magnet draining pump shown in Fig. 7 is to sectional view;

Figure 11 is the structural representation of rotor assembly of the present utility model;

Figure 12 is the structural representation of the stator iron core in the utility model AC permanent-magnet draining pump;

Figure 13 is the first position relationship schematic diagram between arc-shaped surface in the indent circular arc part of stator iron core in the utility model embodiment 3 and the part of rotator seat;

Figure 14 is the second position relationship schematic diagram between arc-shaped surface in the indent circular arc part of stator iron core in the utility model embodiment 3 and the part of rotator seat;

Figure 15 is the explosive view of the first starting mechanism of the utility model AC permanent-magnet draining pump rotor assembly;

Figure 16 is the sectional view after the assembling of rotor assembly shown in Figure 15;

Figure 17 (a) and (b) are that the utility model starts the schematic diagram that overlaps the start-up course that turns clockwise;

Figure 18 (a) and (b), (c) are rotated counterclockwise the schematic diagram of start-up course for the utility model starts cover;

Figure 19 is the explosive view of the second starting mechanism of the utility model AC permanent-magnet draining pump rotor assembly;

Figure 20 is the sectional view of starting mechanism shown in Figure 19;

Figure 21 is the structural representation of the magnetic core in starting mechanism shown in Figure 20 in idling conditions;

Figure 22 is the structural representation of starting mechanism shown in Figure 20 in counterclockwise motion state.

Description of reference numerals: 1-pump cover; 2-impeller; 3-gland; 3a-gland ring; 4-the second seal ring; 5-bearing sealed ring; 6-the first seal ring; 7-coil; 8-stator iron core; 9-rotor drum; 9.1-stainless steel cylinder; 9.2-rubber plug; The 10-pump housing; 10.1-magnetic core containing space; 10a-first pump housing; 10b-second pump housing; 11-rotating shaft; 12-shaft bearing; 12a, 12b-bearing; 13-waterway; 14-bonnet; 15-magnetic core; 16-plastic packaging; 17-rotator seat; Arc-shaped surface in 17a-; 17b-rotator seat gland; 18-joint; 19-bearing support; 20-rotor assembly; 21-starting mechanism; 81-indent circular arc part; Arc-shaped surface in 81a-; 82-cantilever arm.

93a-axle sleeve; 93b-starts cover; 93c, 93c '-damping body; 93a ', 93a ' '-limit rib; 93b ', 93b ' '-startup muscle; 5 '-coil plastic packaging; 61 ' '-rotator seat gland; 93d, 93d '-seal ring; 93e-bonnet; 93f-lubricates muscle; 93a ' ' '-platform; A-first area; B-second area.

1 '-pump cover; 5 '-coil plastic packaging; 7 '-coil; 8 '-stator iron core; 9 '-rotor drum; 10 '-pump housing; 11 '-rotor shaft; 15 '-magnetic core; 17 '-rotator seat; 18 '-buckle.

Embodiment

embodiment 1

As shown in Fig. 2～3, be the AC permanent-magnet draining pump of cancellation rotor drum of the present utility model, it comprises the pump housing 10, pump cover 1, impeller 2, stator iron core 8, coil 7, magnetic core 15, rotating shaft 11, shaft bearing 12, gland 3.

Coil 7 is wound on coil rack, and the both arms of U-shaped stator iron core 8 penetrate coil 7.The coil assembling, skeleton and stator iron core integrated injection molding together, form the bottom lock open-topped pump housing 10, the pump housing 10 after injection molded comprises around the external frame of the coil after assembling and stator iron core and the frame being shaped and the inner core as magnetic core containing space that is positioned at shell inner cavity center.The both arms of U-shaped stator iron core protrude from inner core inwall.Inner core is opened on pump housing top, and its opening is provided with the supporting structure for supporting shaft bearing.

Core assembly inserts magnetic core containing space 10.1 from pump housing top, and rotating shaft 11 runs through the axis hole of magnetic core 15, extends to pump cover from the pump housing.Rotating shaft 11 upper ends and impeller 2 are fixedly connected with and impeller 2 is synchronizeed rotation.In this example, magnetic core containing space 10.1 sealed bottoms, along rotating shaft 11 axially opens, connect with stator iron core 8 both arms spaces of living in.The both arms of U-shaped stator iron core 8 are folded in magnetic core both sides from described axially open.Between stator iron core 8 and magnetic core 15, do not need to arrange rotor drum and separate, therefore gap between the two can be very little.

In pump cover 1, be provided with impeller 2, pump cover 1 assembles mutually and forms complete pump case with the pump housing 10.In this example, the pump housing 10 is also provided with waterway 13, and at least part of chamber wall of waterway is around the position of U-shaped stator iron core and magnetic core interference and be shaped, and waterway opening upwards, is sealed by gland 3, is not communicated with magnetic core containing space 10.1.Waterway 13 is close to outside stator iron core 8, and the heat that in work, stator iron core 8 produces is passed to rapidly to the cooling liquid in waterway 13, reaches the object of motor radiating cooling.Certainly, on the pump housing 10, also can adopt the mode of execution that waterway is not set.

Also can perforate on the gland 3 of waterway, as shown in Figure 2, make waterway water can with pump chamber in water flow, when after the ring wear at shaft bearing place, the water of waterway can arrive pump chamber, then enters into magnetic core containing space.Waterway gland can play and prevent that large foreign material from entering into the effect of waterway.

Inner core open top is provided with shaft bearing 12, and shaft bearing 12 is tightly connected by bearing sealed ring 5 and the open top of magnetic core containing space, and bearing sealed ring 5 prevents that water in pump cover is in inflow pump body from here.Rotator seat gland 17b also serves as the bearing bracket of shaft bearing 12 simultaneously.

Pump cover 1 is provided with the first seal ring 6 with the connection bit of the pump housing 10, in case the pump chamber of uppermost leaf wheel work leaks.

As shown in Fig. 2,3,3a, the pump housing 10 comprises at least the first 10a of pump housing portion of sealing encirclement stator coil and the second 10b of pump housing portion of arrangement rotor assembly 20, in the second 10b of pump housing portion, be provided with the rotator seat 17 that forms magnetic core containing space 10.1, rotator seat 17 comprises magnetic core 15, rotating shaft 11 for suit and support rotor assembly 20(), be surrounded on the waterway 13 of rotator seat 17 outer walls formation and an end opening.

The pump housing 10 of the present embodiment can adopt single injection-molded method or secondary injection molding method to obtain, below take the method through the secondary injection molding acquisition pump housing 10 as example, in the time making the pump housing 10, first adopt the first 10a of pump housing portion of the method acquisition pump housing 10 of injection process for the first time, then on the basis of the first 10a of pump housing portion, adopt the method for injection process for the second time to obtain the second 10b of pump housing portion connecting as one with the first 10a of pump housing portion.

Wherein, utilize plastic package die and plastic material to carry out injection process and form the first 10a of pump housing portion prefabricated coil 7, it surrounds coil 7 and seal, make to form in the element of coil 7, except the element of part plug-in type connecting terminal is all isolated completely with ambient air, thereby avoid forming each element ingress of air of coil 7.With the mode of assembling by stator iron core 8(structure as shown in figure 12) a part be arranged on surrounded by the first 10a of pump housing portion and the coil 7 of sealing in, and the indent circular arc part 81 of stator iron core 8 stretches out in the first 10a of pump housing portion.

Second 10b of pump housing portion of the present embodiment utilizes plastic package die to carry out injection process formation on the basis of the first 10a of pump housing portion, itself and the first 10a of pump housing portion are connected as one, and make the indent circular arc part 81 that stretches out in the stator iron core 8 outside the first 10a of pump housing portion embed the second 10b of pump housing portion, the second 10b of pump housing portion have suit the rotator seat 17 of support rotor assembly be located at outer rim for being connected the joint 18 of pump cover 1.

Waterway 13 1 end openings of the present embodiment, for splendid attire cooling liquid, and the opening end of waterway 13 and rotator seat 17 opening ends are positioned at homonymy.Correspondingly, between pump cover 1 and the second 10b of pump housing portion, be provided with the gland 3 of the opening end for covering waterway 13, cover porosely, waterway and pump chamber are communicated.Between rotator seat 17 and pump cover 1, be provided with the rotator seat gland 17b for opening one end of rotator seat 17 is sealed.Because the indent circular arc part 81 of stator iron core 8 embeds in rotator seat 17, and waterway 13 is located on the outer wall of rotator seat 17, therefore the heat that stator iron core 8 produces at work can pass to rapidly the cooling liquid in waterway 13, thereby reaches the object that makes draining pump radiating and cooling.

Embodiment 2

As shown in Figures 4 and 5, for the AC permanent-magnet draining pump of employing stainless steel rotor drum 9 of the present utility model, it comprises coil 7 after the pump housing 10, pump cover 1, bonnet 14, impeller 2, gland 3, plastic packaging, stator iron core 8, rotor drum 9, rotating shaft 11, rotor bearing 12, magnetic core 15 etc.

In pump cover 1, be provided with impeller 2.The pump housing 10 is shaped around the external frame of coil 7, stator iron core 8, magnetic core 15 after assembling, forms the housing of a upper and lower opening, and its top and pump cover 1 assembly connection with the first seal ring 6 position that is tightly connected are sealed by bonnet 14 bottom it.The pump housing 10 after injection molded comprises around the coil after assembling and the external frame of stator iron core and the frame being shaped and the inner core as magnetic core containing space that is positioned at frame center.Inner core is the non-enclosed space of upper and lower opening, lateral open, connects with stator iron core space of living in.The open top of inner core is provided with the supporting structure for supporting shaft bearing.Rotating shaft 11 runs through the axis hole of magnetic core 15, extends to pump cover from the pump housing.Rotating shaft upper end and impeller are fixedly connected with and impeller is synchronizeed and rotated.

The rotor drum 9 that is provided with a bottom lock in inner chamber chamber, is mounted with magnetic core 15 in rotor drum.Rotor drum 9 has that length is greater than the stainless steel cylinder 9.1 of described magnetic core height and for sealing the rubber plug 9.2 of stainless steel cylinder 9.1.Rubber plug has for erection in the bearing mounting hole of the rear rotary bearing of rotating shaft bottom, adopts the second seal ring 4 to seal between rubber plug and rotor drum.U-shaped stator iron core 8 both arms penetrate coil 7 and extend to rotor drum 9 both sides, and magnetic core containing space and U-shaped stator iron core both arms space of living in connect mutually.Owing to just separating by very thin stainless steel cylinder 9.1 between stator iron core and magnetic core, greatly reduce gap between the two.

In this example, the pump housing 10 is also provided with waterway 13, and at least part of chamber of waterway wall is around the position of U-shaped stator iron core and magnetic core interference and be shaped, and waterway opening upwards, is sealed by gland 3, is not communicated with magnetic core containing space.Waterway is close to outside stator iron core, and the heat that in work, stator iron core produces is passed to rapidly to the cooling liquid in waterway, reaches the object of motor radiating cooling.Certainly, on the pump housing, also can adopt the mode of execution that waterway is not set.

Inner core is provided with rotor bearing 12 in its open top, and the open top that rotor bearing 12 is put space by bearing sealed ring 5 and inner core is tightly connected.Bearing sealed ring 5 prevents that water in pump cover is in inflow pump body from here.Gland 3 also serves as the bearing bracket of rotor bearing 12 simultaneously.

Pump cover 1 is provided with the first seal ring 6 with the connection bit of the pump housing 10, to prevent entering water in the pump housing, or prevents that the pump chamber of impeller work from leaking.

Embodiment 3

As shown in Fig. 6,7,8,9,10, there is shown the utility model AC permanent-magnet draining pump embodiment 3 structure.

AC permanent-magnet draining pump of the present utility model comprises: the pump housing 10, the pump cover 1 being connected with the pump housing 10, be placed in impeller 2 in pump cover 1, be placed in rotor assembly and stator module in the pump housing 10, stator module has coil 7 and stator iron core 8, and rotor assembly has magnetic core 15 and rotating shaft 11.

Wherein, the pump housing 10 comprises the first 10a of pump housing portion of sealed packet contour circle 7 at least and for the second 10b of pump housing portion of rotor assembly 20 is installed, and the first 10a of pump housing portion and the second 10b of pump housing portion connect as one.

In the second 10b of pump housing portion, be provided with the rotator seat 17 for suit and support rotor assembly, the indent circular arc part 81 of stator iron core 8 is embedded in rotator seat 17, rotator seat 17 is the tubular of an end opening, make the interior arc-shaped surface 81a of indent circular arc part 81 as a part of rotator seat 17 interior arc-shaped surface 17a, the common formation of interior arc-shaped surface 81a of the interior arc-shaped surface 17a of rotator seat and the indent circular arc part 81 of embedding held inner chamber, be magnetic core containing space 10.1, for being set with and supporting the rotor assembly that comprises magnetic core and rotating shaft.The second 10b of pump housing portion lateral margin forms joint 18, and joint 18 connects pump cover 1.

In the time that the part of stator iron core 8 or whole interior arc-shaped surface 81a are rotator seat 17 interior arc-shaped surface 17a a part of, magnetic air gap between the outer surface of magnetic core 15 and the interior arc-shaped surface 81a of stator iron core 8, equals the distance b (as shown in figure 14) between the outer surface of magnetic core 15 and the interior arc-shaped surface 17a of rotator seat 17; In the time that the interior arc-shaped surface 81a of stator iron core 8 protrudes from the interior arc-shaped surface 17a of rotator seat 17 to axis direction, magnetic air gap a is less than distance b (as shown in figure 13).

It should be noted that, in the part of stator iron core 8, arc-shaped surface 81a is a part of rotator seat 17 interior arc-shaped surface 17a, a part (such as end portion) that refers to interior arc-shaped surface 81a may be sealed by the second pump housing portion, and interior arc-shaped surface 81a remaining part exposes and become a part of rotator seat 17 interior arc-shaped surface 17a.

Like this, just make the gap between the outer surface of magnetic core 15 and the interior arc-shaped surface 81a of stator iron core 8 of rotor assembly greatly reduce, at utmost reduce the magnetic air gap a between the magnetic core 15 in stator iron core 8 and rotor assembly, magnetic resistance is reduced, greatly improved electromagnetic efficiency.

Particularly, because the gap between the interior arc-shaped surface 81a of stator iron core 8 and the outer surface of the magnetic core 15 of rotor assembly is at utmost reduced, effectively improve electromagnetic efficiency, therefore in the case of realizing same starting torque or reaching identical usability, the utility model draining pump is compared the draining pump of existing structure, the silicon steel plate quantity adopting reduces by 1/3, therefore the length of magnetic core reduces 1/3, form the also corresponding minimizing of enameled cable amount of coil, thereby effectively reduce the manufacture cost of draining pump.

As shown in figure 12, stator iron core 8 is U-shaped, and it has a pair of cantilever arm 82 and surrounds with the interior arc-shaped surface of 81, two the indent circular arc part 81 of a concave circular arc part that lay respectively at a pair of cantilever arm 82 one end the cavity that holds magnetic core 15.

In the time adopting single injection-molded method to make the pump housing 10, utilize plastic package die and plastic material to carry out injection process one time to stator iron core 8 and coil 7, form all-in-one-piece the first 10a of pump housing portion and the second 10b of pump housing portion.Preferably, plastic material is BMC material.

First, adopt skeleton, enameled cable, plug-in type connecting terminal, heat protector and sealing compound paper to make coil 7, and U-shaped stator iron core 8 is adopted to passivation and electrophoretic process; Then, the both arms of stator iron core 8 82 are penetrated to coil 7, what make stator iron core 8 comprises the stretching out outside coil 7 of indent circular arc part 81; Finally, coil 7 and stator iron core 8 are put into plastic package die and carry out injection process one time, form the pump housing 10 that comprises the first pump housing portion and the second pump housing portion that is wrapped in coil 7 and stator iron core 8 outsides.

Wherein, the first 10a of pump housing portion encirclement and encapsulated coil 7 and stator iron core 8 are positioned at the part within coil 7, the element (except the part of plug-in type connecting terminal) that the first pump housing portion surrounds, sealing forms coil 7, itself and ambient air are isolated, and stator iron core 8 is positioned at the part of coil and the end relative with indent circular arc part 81 also surrounded sealing and isolate with ambient air by the first 10a of pump housing portion.

The indent circular arc part 81 of stretching out the stator iron core 8 outside coil 7 embeds in the second 10b of pump housing portion, the rotator seat 17 of the second 10b of pump housing portion is the tubular of an end opening, the common inner chamber that holds rotor assembly that forms of the interior arc-shaped surface of this rotator seat and the interior arc-shaped surface of indent circular arc part 81, and the indent circular arc part 81 axis L(that surround, that rotor assembly can be held to indent cavity wherein of stator iron core 8 is as shown in figure 12) and the center line of the rotator seat 17 of the second pump housing portion coincide.

By making the interior arc-shaped surface 81a of indent circular arc part 81 and the common inner chamber that holds rotor assembly that forms of the interior arc-shaped surface 17a of rotator seat 17 of stator iron core 8, can make the air gap a between magnetic core 15 outer surfaces and the interior arc-shaped surface 81a of stator iron core 8 of rotor assembly at utmost reduce, thereby greatly reduce magnetic resistance, improve electromagnetic efficiency.

In the time adopting the method for secondary injection molding to manufacture the pump housing 10, first adopt on coil injection moulding for the first time to obtain first 10a of pump housing portion of the pump housing 10 of coil overmold, then stator iron core 8 in the first 10a of pump housing portion assembling, adopts injection moulding for the second time to obtain the second 10b of pump housing portion connecting as one with the first 10a of pump housing portion take the first 10a of pump housing portion and stator iron core 8 as basis.

In the time adopting the method for secondary injection molding to make the pump housing 10, the first 10a of pump housing portion in the pump housing 10 adopts BMC material, and the second 10b of pump housing portion adopts the thermoplastic material that is easy to moulding, as PP material, but also can adopt BMC material to make.

In the process of the manufacture pump housing 10, adopt single injection-molded or the method for secondary injection molding no matter be, at least coil overmold 7 of the first 10a of pump housing portion in the pump housing 10, make coil by the sealing that 10a surrounds of the first pump housing portion by injection molding forming method, like this, make coil 7 and the first 10a of pump housing portion integral, not only reduced product resonance and product noise, and be conducive to heat radiation.

Wherein, the first 10a of pump housing portion can utilize plastic package die and plastic material prefabricated coil 7 is carried out to injection process and form, it surrounds coil 7 and seal, make to form in the element of coil 7, all the other elements except part plug-in type connecting terminal are all isolated completely with ambient air, thereby have avoided the each element that forms coil 7 be isolated from the outside and avoid contacting with air.With the mode of assembling by stator iron core 8 be inserted into surrounded by the first 10a of pump housing portion and the coil 7 of sealing in, and make the indent circular arc part 81 of stator iron core 8 stretch out in the first 10a of pump housing portion.

Or the first 10a of pump housing portion can also utilize plastic package die and plastic material to be arranged on stator iron core 8 in stator dress circle 7 to prefabricated coil 7 and its part to carry out injection process and form.Wherein, make after coil 7, a part for stator iron core 8 is arranged in coil 7, and the indent circular arc part 81 of a pair of cantilever arm one end of stator iron core 8 is stretched out in outside coil 7, the stator iron core 8 that recycling plastic package die and plastic material are arranged in coil 7 coil 7 and its part carries out injection process, the part being placed in coil 7 of coil 7 and stator iron core 8 is surrounded by the first 10a of pump housing portion, and indent circular arc part 81 on a pair of cantilever arm of stator iron core 8 stretch out in outside the first 10a of pump housing portion.Now, form in the element of coil 7, all the other elements and ambient air except part plug-in type connecting terminal are isolated completely, thereby avoid forming each element ingress of air of coil 7, and stator iron core 8 parts that are arranged in coil 7 are also surrounded and are sealed and isolate completely with ambient air by the first 10a of pump housing portion together with coil 7.

The second 10b of pump housing portion by the basis of the first 10a of pump housing portion that stator iron core 8 and parcel coil 7 are installed, utilize plastic package die to carry out injection process to be formed, itself and the first 10a of pump housing portion connect as one.

The second 10b of pump housing portion is the sealing of the part except the interior arc-shaped surface of indent circular arc part 81 encirclement by stator iron core 8, and the indent circular arc part 81 that makes to stretch out in outside the first 10a of pump housing portion embeds in the second 10b of pump housing portion.The second 10b of pump housing portion has rotator seat 17 and joint 18, and rotator seat 17 is the tubular of an end opening, has inner chamber, and for suit support rotor assembly, joint 18 is positioned at the lateral margin of the second 10b of pump housing portion, for connecting pump cover 1.

The indent circular arc part 81 of stator iron core 8 is embedded in rotator seat 17, and in a part for indent circular arc part 81, arc-shaped surface 81a or all interior arc-shaped surface 81a become a part of rotator seat 17 interior arc-shaped surface 17a, and common formation is held the inner chamber of rotor assembly.The interior arc-shaped surface 17a(that in the part of indent circular arc part 81, arc-shaped surface 81a can protrude from rotator seat 17 towards axis direction is as shown in figure 13), or with the interior arc-shaped surface 17a equal (as shown in figure 14) of rotator seat 17.

One end of sealing at rotator seat 17 is provided with bearing support 19, and rotor assembly inserts in rotator seat 17 from one end of rotator seat 17 openings, makes magnetic core 15 be positioned at the cavity part being surrounded by two arc-shaped surface 81a of the indent circular arc part 81 of stator iron core 8.In addition, between the second pump housing portion 7 and pump cover 1, gland 3 is installed, and for guaranteeing sealability, as shown in Figure 8, between pump cover 1 and gland 3, is mounted with the first seal ring 6, between gland 3 and the pump housing 10, be mounted with gland ring 3a.

The two ends of rotating shaft 11 are separately installed with bearing 2, bearing 12 is connected with gland 3 by rotor shaft sealing circle 5, bearing 12b is bearing in the bearing support 19 of rotator seat 17, bearing 12a forms the support of countershaft 11 together with bearing 12b, thereby avoids rotor shaft to produce in the course of the work radial and axial rocking.

In rotating shaft 11, establish the starting mechanism 21 that drive shaft 11 is rotated with magnetic core 15, its be placed in magnetic core 15 away from one end of impeller 2 or magnetic core 15 near one end of impeller 2, in figure, only illustrate that starting mechanism 21 is placed in magnetic core 15 one end away from impeller 2.

Wherein, magnetic core 15 is placed in the indent circular arc part 81 of stator iron core 8, and has running clearance (being magnetic air gap) between magnetic core 15 outer surfaces and the inner arc surface of indent circular arc part 81.Preferably, described running clearance is 0.5mm.Conventionally, the inner arc surface of indent circular arc part 81 is made up of two sections of different arc surfaces of radius, and running clearance refers to the gap (as shown in Figure 13, Figure 14) forming between arc surface that radius is less and the outer surface of magnetic core 15.The interior arc-shaped surface of the indent circular arc part 81 of employing stator iron core 8, as a part for rotator seat 17 interior arc-shaped surface, has reduced the magnetic air gap between magnetic core 15 and stator iron core, thereby reduces magnetic resistance, raising electromagnetic efficiency.

In the time that coil 7 is passed to Ac, coil 7 produces alternating magnetic field by stator iron core 8, drive the magnetic core 15 in rotor assembly to rotate forward or backwards, and magnetic core 15 is set in rotating shaft 11, when magnetic core 15 rotates forward or backwards, rotate by starting mechanism 21 drive shafts 11, rotating shaft 11 is fixedly mounted on the rotating center of impeller 2, therefore when rotating shaft 11 is rotated, can impeller 2 rotate forward or backwards with it, thereby realize the function of draining.

As shown in Figure 15,19, the starting mechanism of the present embodiment comprises: be fixedly mounted on the startup cover 93b of magnetic core 15 one end, start cover 93b and made by nonmagnetic substance, thus the cost of production of saving magnetic core; Be fixedly mounted on the axle sleeve 93a in rotating shaft 11, it is placed in and starts in cover 93b; And, start between cover 93b and axle sleeve 93a and contact by shock reducing structure.

As shown in Figure 16,20, axle sleeve 93a is placed in and starts in cover 93b, and its outer wall is provided with limit rib 93a ', 93a "; Be provided with and start muscle 93b ', 93 at startup cover 93b inwall "; Start between muscle and limit rib and contact by

shock reducing structure

93c, 93c '.Owing to starting the gap (as shown in Figure 18 (b), 21) that forms anti-interference between muscle and limit rib, while making to start, the maximum angle that startup muscle can obtain before promoting limit rib by shock reducing structure is at least 220 °.

Concrete, if rotor assembly 20 adopts the first starting mechanism as shown in Figure 15-Figure 18, when it starts, the maximum angle that startup muscle can obtain before promoting limit rib by shock reducing structure is at least 220 °, thereby axle sleeve 93a is rotated with the rotating shaft 11 being fixedly connected with axle sleeve 93a, and then the impeller 2 that driving is fixedly connected with rotating shaft 11 rotate.

Wherein, as shown in Figure 15,16, the startup cover 93b inwall of the first starting mechanism is provided with two and starts muscle 93b ', 93b ' ', and axle sleeve 93a outer wall is provided with two limit rib 93a ' 93a ' ' (shown in Figure 16); Between startup muscle 93b ' and limit rib 93a ', the first shock reducing structure 93c is housed, between startup muscle 93b ' ' and limit rib 93a ' ', the second shock reducing structure 93c ' is housed; And, start muscle 93b ' and 93b " end face be greater than limit rib 93a ' and 93a ' ' the end face distance from axle center from the distance in axle center; make; starting between muscle 93b ' and limit rib 93a ', start muscle 93b ' and limit rib 93a " between, between startup muscle 93b ' ' and limit rib 93a ', between startup muscle 93b ' ' and limit rib 93a ' ', radially can form certain interval, i.e. anti-interference gap.The effect in this anti-interference gap is, if while not having the first shock reducing structure 93c or the second shock reducing structure to stop, starts muscle 93b ' or 93b " can rotate respectively by limit rib 93a ' or 93a ' '.

As shown in Figure 17 (a) and (b), while starting the startup of cover 93b clockwise direction, starting muscle 93b ' can rotate along clockwise direction, finally by a side of the first shock reducing structure 93c contact limit rib 93a '; And start muscle 93b " also rotate along clockwise direction, finally by the second shock reducing structure 93c ' contact limit rib 93a " a side.Like this, if the output torque of motor is less than starting torque, under the effect of alternating magnetic field, it can rotate along the counter clockwise direction shown in Figure 18, and with propeller shaft sleeve, 93a is rotated counterclockwise.Below with reference to Figure 18, process is subsequently described.

As shown in figure 18, first, start cover 93b is turned to Figure 18 (a) in the counterclockwise direction position by the position shown in Figure 17 (b), then, owing to starting muscle 93b ' and limit rib 93a " between there is anti-interference gap; therefore; startup muscle 93b ' can turn over limit rib 93a in the counterclockwise direction without let or hindrance " (seeing shown in Figure 18 (b)), and start muscle 93b " and limit rib 93a ' between also have anti-interference gap, therefore start muscle 93b " also can turn in the counterclockwise direction limit rib 93a '; Finally, start muscle 93b ' by the opposite side of the second shock reducing structure 93c ' contact limit rib 93a ', and start muscle 93b " by the first shock reducing structure 93c contact limit rib 93a " opposite side, arrive position as shown in Figure 18 (c) shows.Like this, start cover 93b and just drive axle sleeve 93a to be rotated counterclockwise, thereby drive shaft 11 impeller rotate counterclockwise.

According to the process shown in Figure 18 (a)-(c), make to start muscle 93b ' and 93b " turned to the position of Figure 18 (c) by the position of Figure 17 (b); and rotational travel can reach 220 °, and the starting torque therefore producing increases greatly, is conducive to starting mechanism and starts vane rotary.

In addition, as shown in figure 15, away from one end of impeller 2, bonnet 93e is installed at magnetic core 15, between axle sleeve 93a and bonnet 93e, start between cover 93b and axle sleeve 93a and be mounted with respectively seal ring 93d, 93d '.

In the time that stator coil 7 is passed to Ac, the alternating magnetic field that stator coil 7 produces drives magnetic core 15 to rotate by stator iron core 8, starting cover 93b rotates with magnetic core 15, the startup muscle 93b ' that starts cover 93b can contact (as shown in Figure 18 (c) shows) with the limit rib 93a ' of axle sleeve 93a by the second shock reducing structure 93c ', the startup muscle 93b ' ' that starts cover 93b inwall contacts (as shown in Figure 18 (c) shows) by the first shock reducing structure 93c with the limit rib 93a ' ' of axle sleeve 93a, thereby by limit rib 93a ', 93a ' ' propeller shaft sleeve 93a rotates, because axle sleeve 93a is fixedly connected with rotating shaft 11, therefore rotating shaft 11 is rotated accordingly, the impeller 2 that drive is fixed on rotating shaft 11 one end rotates, thereby make AC permanent-magnet draining pump realize drain function by impeller.

Concrete, the one end that start cover 93b and be take magnetic core 15 as inserts, adopts the method for injection process that plastic material is fixed on to magnetic core 15 forms, start cover 93b and there is the holding cavity for settling axle sleeve 93a, be arranged with the startup muscle 93b ', the startup muscle 93b ' ' that protrude towards its axis direction at the inwall of startup cover 93b, and two sidewalls of startup muscle 93b ', startup muscle 93b ' ' has respectively the first indent arc shaped surface.

Axle sleeve 93a has tubular body and limit rib 93a ', 93a ' ', limit rib 93a ' and 93a ' ' are for being symmetrically set in two outwardly portions of tubular body outer wall, and two sidewalls of limit rib 93a ' and limit rib 93a ' ' have respectively the second indent arc shaped surface.Preferably, the radius of curvature of the second indent arc shaped surface is identical with the radius of curvature of the first indent arc shaped surface of startup muscle 93b ', startup muscle 93b ' '.

Preferably, the exterior radius of limit rib 93a ', 93a ' ' is slightly less than the inwall radius that starts muscle 93b ', 93b ' ', therefore between the outer wall of limit rib 93a ', 93a ' ' and the inwall of startup muscle 93b ', 93b ' ', form anti-interference gap, limit rib 93a ', 93a ' ' can be rotated and can not pile up relatively with startup muscle 93b ', 93b ' '.

As shown in Figure 17 (b), start between the first indent arc shaped surface of muscle 93b ' and the second indent arc shaped surface of limit rib 93a ' corresponding thereto, surround the first space of non-closure; Start between the first indent arc shaped surface of muscle 93b ' ' and the second indent arc shaped surface of limit rib 93a ' ' corresponding thereto, surround the second space of non-closure.Wherein, in the first space, be mounted with the first shock reducing structure 93c, in second space, be mounted with the second shock reducing structure 93c '.In the utility model, the first shock reducing structure 93c and the second shock reducing structure 93c ' adopt the identical cylindrical body of structure or spheroid, it adopts plastic material to make, as rubber, and adding man-hour, the first shock reducing structure 93c and the second shock reducing structure 93c ' can adopt solid construction, also can adopt hollow-core construction.

Preferably, the radius of the first shock reducing structure 93c and the second shock reducing structure 93c ' is less than the radius of curvature of the first indent arc shaped surface and the second indent arc shaped surface, in the time that the first indent arc shaped surface and the second indent arc shaped surface corresponding thereto form the first space or second space, can make to settle the first shock reducing structure 93c in the inner or the second shock reducing structure 93c ' respectively with described the first indent arc shaped surface and the second indent arc shaped surface Spielpassung, shock reducing structure can not be stuck like this, and is convenient to have certain distortion when the collision of shock reducing structure and limit rib contacts and strengthens buffer function.Preferably, the first shock reducing structure 93c and the second shock reducing structure 93c ' adopt unfixed form in described the first space and second space, can Free-rolling or slip in the first space and second space, and, the first shock reducing structure 93c and the second shock reducing structure 93c ' are yi word pattern and distribute, and the first shock reducing structure 93c and the second shock reducing structure 93c ' are symmetrically distributed in the both sides of described rotating shaft 11.

Wherein, ultimate range between the inwall of the tubular body outer wall of axle sleeve 93a and startup muscle 93b ' or startup muscle 93b ' ' is less than the diameter of the first shock reducing structure 93c and the second shock reducing structure 93c ', thereby make to start muscle 93b ', start muscle 93b ' ' and limit rib 93a ', 93a ' ' respectively near time, the first shock reducing structure 93c and the second shock reducing structure 93c ' are squeezed, and startup muscle 93b ' and limit rib 93a ', starting muscle 93b ' ' can not bump with limit rib 93a ' ' itself, therefore make axle sleeve 93a can not overlap 93b direct collision or friction with startup, can not make axle sleeve 93a and magnetic core 15 direct collisions or friction, thereby when having reduced AC permanent-magnet draining pump and having started between axle sleeve 93a and the first shock reducing structure 93c and the second shock reducing structure 93c ', between the first shock reducing structure 93c and startup cover 93b and magnetic core 15, beating noise between the second shock reducing structure 93c ' and startup cover 93b and magnetic core 15, while making the work of AC permanent-magnet draining pump, vibration is less, quieter.

In the time of design, start muscle 93b ', start muscle 93b ' ' and the first shock reducing structure 93c, the height of the axial direction along rotating shaft 11 of the second shock reducing structure 93c ' is not more than limit rib 93a ', the height along axial direction of 93a ' ', and depart from described the first space and second space for fear of the first shock reducing structure 93c and the second shock reducing structure 93c ', as shown in Figure 67, be equipped with in tubular body one end of axle sleeve 93a by the outward extending circular platform 93a ' ' ' in axle center, the bottom of platform 93a ' ' ' and limit rib 93a ', the top of 93a ' ' is fixedly connected with respectively, thereby by the first shock reducing structure 93c and the second shock reducing structure 93c ' respectively by shutoff in described the first space and second space.During fabrication, the tubular body of axle sleeve 93a, platform 93a ' ' ' and limit rib 93a ', 93a ' ' the integrated structure for adopting plastic material to obtain by the method for injection process.And, start muscle 93b ', 93b ' ' and start the also integrated structure for adopting plastic material to obtain by the method for injection process of cover 93b.

The working principle of the first starting mechanism of the present utility model is described below in conjunction with Figure 16-18.

As shown in figure 16, when limit rib 93a ' is during near the startup muscle 93b ' corresponding with it, the first indent arc shaped surface and the second indent arc shaped surface of described limit rib 93a ' and the relative side of startup muscle 93b ' are positioned at same circumference, and enclose the first space of non-closure.Now, limit rib 93a ' ' and to start muscle 93b ' ' mutually close, and the first indent arc shaped surface and the second indent arc shaped surface of limit rib 93a ' ' and the relative side of startup muscle 93b ' ' be also positioned at same circumference, encloses the second space of non-closure.Now, be placed in respectively the line of symmetry center of the first shock reducing structure 93c in the first space and second space and the second shock reducing structure 93c ' through the axis of rotating shaft 11, the first shock reducing structure 93c and the second shock reducing structure 93c ' are centered by the axis of rotating shaft 11, and phase angle differs 180 °.

As Figure 17 (a), (b) shown in, for starting mechanism is clockwise rotated position as shown in Figure 16, stator coil 7 produces action of alternating magnetic field in stator iron core, drive magnetic core 15 to carry out clockwise direction rotation around the axis of rotating shaft 11 by stator iron core 8, the startup being fixed on magnetic core 15 is overlapped 93b along with magnetic core 15 clockwise directions rotate, start the startup muscle 93b ' of cover 93b, startup muscle 93b ' ' promotes respectively the first shock reducing structure 93c and contacts limit rib 93a ' and limit rib 93a ' ' with the second shock reducing structure 93c ', thereby promote to be set with the axle sleeve 93a clockwise direction rotation of being fixed on rotor shaft, axle sleeve drives rotating shaft 11 to rotate along clockwise direction with it, and then the impeller 2 that drive is fixedly connected with rotating shaft 11 rotates along clockwise direction.

As shown in figure 18, under action of alternating magnetic field, magnetic core 15 carries out counter clockwise direction around the axis of rotating shaft 11 and rotates, and the startup being fixed on magnetic core 15 is overlapped 93b along with magnetic core 15 counterclockwise rotates.

Start the startup muscle 93b ' on cover 93b, when startup muscle 93b ' ' turns to the position as shown in Figure 18 (b) by the position of Figure 18 (a), there is gap owing to starting muscle 93b ' and limit rib 93a ' ', start between muscle 93b ' ' and limit rib 93a ' and there is gap, therefore start muscle 93b ' and can turn over limit rib 93a ", start muscle 93b " can turn over limit rib 93a ', and promote respectively the second shock reducing structure 93c ' and the first shock reducing structure 93c rotates counterclockwise after several angle, make to start muscle 93b ' and respectively with limit rib 93a ' with limit rib 93a ' ' contact (as shown in Figure 18 (c) shows) by the second shock reducing structure 93c ' with the first shock reducing structure 93c with startup muscle 93b ' ', promoting thus axle sleeve 93a rotates, axle sleeve 93a drives the rotating shaft 11 being fixedly connected with it to rotate in the counterclockwise direction, and then drive the impeller 2 that is fixed on rotating shaft 11 one end to rotate counterclockwise.

As shown in Figure 17 and Figure 18, in fact, start in cover 93b and be along the circumferential direction separated to form two roughly semicircular area by starting muscle 93b ' and starting muscle 93b ' ', be first area A and second area B, the first shock reducing structure 93c can only be in first area A activity, and the second shock reducing structure 93c ' can only be in second area B activity.

Preferably, when magnetic core 15 drive shafts 11 of the present utility model are rotated, the maximum angle of magnetic core 15 idle runnings is 220 °.

Starting mechanism of the present utility model, in the time that magnetic core rotates, starts muscle and rotates with propeller shaft sleeve by shock reducing structure contact limit rib, and the rotation of axle sleeve drives the rotor shaft that is installed with impeller to rotate, and then impeller is rotated.Therefore, the starting torque that can obtain of AC permanent-magnet draining pump of the present utility model is large, starts more steady; Particularly, shock reducing structure and limit rib and start between muscle as line contacts, friction is each other sliding friction, therefore damping is little; Two shock reducing structures are cylindrical and are symmetric and work simultaneously in startup cover, the therefore good dynamic balance of rotor assembly, and eccentric force is little, long service life.

As shown in Figure 19-22, the structure of the second starting mechanism of the present embodiment shown in figure, contacts and promotes limit rib by shock reducing structure after starting 270 ° of muscle idle running.

As shown in Figure 19,20,21, this starting mechanism has the cover of startup 93b inwall and is provided with a startup muscle 93b ', axle sleeve 93a outer wall is provided with a limit rib 93a ', as shown in figure 20, in the cavity starting between cover 93b and axle sleeve 93a, between startup muscle 93b ' and limit rib 93a ', be mounted with the shock reducing structure 93c along the circumferential direction arranging, start between muscle 93b ' and limit rib 93a ' and have anti-interference gap (as shown in figure 21), shock reducing structure 93c can along the circumferential direction rotate under the promotion that starts muscle 93b '.

In addition, away from one end of impeller 2, bonnet 93e is installed at magnetic core 15, between axle sleeve 93a and bonnet 93e, start between cover 93b and axle sleeve 93a and be mounted with respectively seal ring 93d, 93d ', and, on the inwall of shock reducing structure 93c ', be provided with multiple lubricated muscle 93f, can reduce shock reducing structure and axle sleeve outer wall and start the area of contact of overlapping inwall, thereby reduce frictional force.

In the time that stator coil 7 is passed to Ac, the alternating magnetic field that stator coil 7 produces drives magnetic core 15 to rotate by stator iron core 8, start cover 93b rotates with it under the effect of magnetic core 15 simultaneously, the startup muscle 93b ' that starts cover 93b inwall can contact with the limit rib 93a ' of axle sleeve 93a outer wall, and rotate by limit rib 93a ' propeller shaft sleeve 93a, because axle sleeve 93a is fixedly connected with rotating shaft 11, therefore rotating shaft 11 is rotated accordingly, and impeller 2 is fixed on one end of rotating shaft 11, therefore impeller 2 rotates along with the rotation of rotating shaft 11, thereby make AC permanent-magnet draining pump realize the function of draining.

Concrete, startup cover 93b is take magnetic core 15 as inserts, adopts the method for injection process plastic material to be fixed on to one end of magnetic core 15, start cover 93b and there is the holding cavity for settling axle sleeve 93a, be provided with a startup muscle 93b ' who protrudes towards the axis direction that starts cover 93b at the inwall of startup cover 93b, and this startup muscle 93b ' is quadrant.

Axle sleeve 93a has tubular body and limit rib 93a ', limit rib 93a ' is the quadrant outwardly by tubular body, preferably, this quadrant has identical centre of curvature with the quadrant that forms startup muscle 93b ', and this centre of curvature is positioned on the axis of rotating shaft 11.

Particularly, as shown in figure 21, the exterior radius of limit rib 93a ' is slightly less than the inwall radius that starts muscle 93b ', therefore be rotated counterclockwise at startup cover 93b, make to start muscle 93b ' and rotate to the position coinciding with limit rib 93a ' shown in Figure 21,, owing to thering is the gap of anti-interference between the outer wall of limit rib 93a ' and the inwall of startup muscle 93b ', limit rib 93a ' can be rotated and can not pile up relatively with startup muscle 93b ', in rotation process, can mutually not interfere.

As shown in figure 20, by limit rib 93a ', the startup muscle 93b ' both sides that start cover are separated into two sector spaces, between limit rib 93a ' and the opposing sidewalls of startup muscle 93b ', form two fan-shaped chambeies, now shock reducing structure 93c is placed in one of them fan-shaped chamber.Shock reducing structure 93c is the sector structure similar to fan-shaped cavity shape, and it adopts plastic material to make, and as rubber, and is adding man-hour, and shock reducing structure 93c can adopt solid construction, also can adopt hollow-core construction.

Preferably, shock reducing structure 93c is that central angle is the roughly quadrant of 90 °, and the centre of curvature of its inside and outside fan-shaped wall is all positioned on the axis of rotating shaft 11.The outer fan-shaped wall radius of shock reducing structure 93c is greater than the inwall radius that starts muscle 93b ', the interior fan-shaped wall radius of shock reducing structure 93c is less than the exterior radius of limit rib 93a ', thereby make the outer wall Spielpassung of the interior fan-shaped wall of shock reducing structure 93c and the tubular body of axle sleeve, the outer fan-shaped wall of shock reducing structure 93c forms Spielpassung with the inwall starting outside the startup muscle 93b ' of cover 93b, and two sidewalls of shock reducing structure 93c can be respectively with start two sidewalls of muscle 93b ' and two sidewalls of limit rib 93a ' contact.And shock reducing structure 93c freely rotates in described fan-shaped chamber.

Wherein, the tubular body outer wall of axle sleeve 93a and start thickness that ultimate range between muscle 93b ' inwall is less than shock reducing structure 93c in, outer fan-shaped wall radius poor, thereby make to start muscle 93b ' and limit rib 93a ' near time, shock reducing structure 93c is squeezed, can not collide with limit rib 93a ' itself and start muscle 93b ', make axle sleeve 93a can not overlap 93b direct collision or friction with startup, thereby axle sleeve 93a and shock reducing structure 93c while having reduced the startup of AC permanent-magnet draining pump, beating noise between shock reducing structure 93c and startup cover 93b and magnetic core 15, while making the work of AC permanent-magnet draining pump, vibration is less, quieter.

In the time of design, the height along rotating shaft 11 axial directions that starts muscle 93b ' and shock reducing structure 93c is not more than the height along axial direction of limit rib 93a ', and depart from described fan-shaped chamber for fear of shock reducing structure 93c, as shown in Figure 7, tubular body outer wall at axle sleeve 93a is equipped with outwardly platform, the bottom of platform is connected with the top of limit rib 93a ', thus by shock reducing structure 93c shutoff in described fan-shaped chamber.

During fabrication, the tubular body of axle sleeve 93a, platform and limit rib 93a ' the integrated structure for adopting plastic material to obtain by the method for injection process.And, start muscle 93b ' and start the also integrated structure for adopting plastic material to obtain by the method for injection process of cover 93b.

The working principle of starting mechanism of the present utility model is described below in conjunction with Figure 20-Figure 22.

As shown in figure 20, as limit rib 93a ' with when starting muscle 93b ' and along the circumferential direction mutually staggering, in the position shown in Figure 20, between the limit rib 93a ' sidewall relative with starting muscle 93b ', form two fan-shaped chambeies, shock reducing structure 93c is positioned at a wherein fan-shaped chamber of upside, now, a sidewall of shock reducing structure 93c offsets with a sidewall that starts muscle 93b ', and a sidewall of another sidewall of shock reducing structure 93c and limit rib 93a ' offsets.

Now, stator coil 7 produces alternating magnetic field, alternating magnetic field drives magnetic core 15 to rotate around the axis clockwise direction of rotating shaft 11 by stator iron core 8, the startup cover 93b fixing with magnetic core 15 rotates around the axis clockwise direction of rotating shaft 11 with magnetic core 15, start a sidewall contact of the startup muscle 93b ' on cover 93b and promote shock reducing structure 93c rotation and the sidewall against limit rib 93a ', owing to starting, stroke is too small, and the resistance of start is excessive and be not enough to promote axle sleeve and rotate by rotor shaft impeller.

At this moment, magnetic core 15 is under magnetic fields, will be rotated counterclockwise, drive the startup cover 93b being fixedly connected with it to carry out anticlockwise rotation around the axis of rotating shaft 11, first arrive position as shown in figure 21, there is anti-interference gap owing to starting between muscle 93b ' and limit rib 93a ', therefore start muscle 93b ' rotation by limit rib 93a, and make to start another sidewall of muscle 93b ' and another sidewall contact of shock reducing structure 93c; In the time that startup muscle 93b ' continues to rotate in the counterclockwise direction, start muscle 93b ' promotion shock reducing structure 93c and rotate in the counterclockwise direction around the axis of rotating shaft 11, until a sidewall of shock reducing structure 93c is against on another sidewall of limit rib 93a ', as shown in figure 22.Obviously, this counterclockwise start-up course has larger unloaded process (process till referring on rotating counterclockwise another sidewall that starts to be against to a sidewall of shock reducing structure 93c limit rib 93a ') rotation angle.

In the position shown in Figure 22, start cover promotion shock reducing structure 93c continues counterclockwise to rotate thereupon, promoting limit rib 93a ' by shock reducing structure 93c rotates, making axle sleeve 93a carry out counter clockwise direction rotates, axle sleeve 93a, by the rotating shaft 11 being fixedly connected with it, drives the impeller 2 that is fixed on rotating shaft 11 one end along counterclockwise rotating.

Preferably, when magnetic core 15 drive shafts 11 of the present utility model are rotated, the rotary maximum angle of magnetic core 15 is 270 °.

Therefore, start according to the process shown in Figure 20-22, make to start muscle 93b ' and turned to by the position of Figure 20 the position of Figure 22, rotational travel has reached 270 °, the increase of unloaded rotational travel is just coupled impeller load according to the rotating speed of such motor when causing rotating speed to reach higher value---torque mechanical property, torque when this larger rotating speed also has higher value, and has formed larger rotary inertia kinetic energy, is now conducive to starting mechanism and starts vane rotary.

There is the starting mechanism of said structure, in the time that magnetic core rotates, promote shock reducing structure by starting muscle, promote again the method for limit rib by shock reducing structure, propeller shaft sleeve rotates, thereby rotor shaft is rotated, and then impeller is rotated, make the starting torque of AC permanent-magnet draining pump of the present utility model large, start more steady; And seal ring can seal to the grease starting in cover, and be provided with multiple lubricated muscle at the inwall of shock reducing structure, avoid rotor assembly longevity of service make shock reducing structure lose lubricated and damage therefore long service life; Shock reducing structure adopts sector structure, and it is stressed more well-balanced, therefore starts noise little.

Although above the utility model is explained in detail; but the utility model is not limited to this; those skilled in the art can modify according to principle of the present utility model; therefore, all various modifications of carrying out according to principle of the present utility model all should be understood to fall into protection domain of the present utility model.

Claims

1. one kind can reduce the AC permanent-magnet draining pump of vibrating noise, comprise the pump housing (10), connect the pump housing pump cover (1), be placed in impeller (2), the magnetic core (15) in pump cover, the rotating shaft (11) that runs through the axis hole of magnetic core (15), stator iron core (8) and coil (7), coil (7) is wound in coil rack, stator iron core (8) is assemblied in coil (7), it is characterized in that:

The described pump housing (10) be around assembling after coil (7), coil rack and stator iron core (8) profile integrated injection molding form housing, described housing limits one and is opened on top and extends to the magnetic core containing space (10.1) for accommodating magnetic core (15) at pump housing center from opening, and the open top of magnetic core containing space is provided with the supporting structure for supporting revolving shaft bearing.

2. AC permanent-magnet draining pump as claimed in claim 1, is characterized in that:

Comprise the stator module of described coil (7) and stator iron core (8) and comprise described rotating shaft (11), within the rotor assembly (20) that is arranged in the magnetic core (15) in rotating shaft (11) is placed in the described pump housing (10);

It is upper that described impeller is fixedly mounted on described rotating shaft (11),

In the described pump housing (10), be provided with the rotator seat (17) for supporting described rotor assembly, described magnetic core containing space (10.1) is surrounded by the internal surface of described rotator seat;

The indent circular arc part (81) of described stator iron core (8) embeds in described rotator seat (17).

3. AC permanent-magnet draining pump according to claim 2, it is characterized in that, the described pump housing (10) comprises the first pump housing portion (10a) of encapsulated coil (7) at least and for the second pump housing portion (10b) of rotor assembly (20) is installed, and the first pump housing portion (10a) connects as one with the second pump housing portion (10b).

4. AC permanent-magnet draining pump according to claim 3, it is characterized in that, described rotator seat (17) is arranged in described the second pump housing portion (10b) and is structure as a whole with it, and the outer rim of described the second pump housing portion (10b) is provided with the joint (18) for connecting described pump cover (1).

5. AC permanent-magnet draining pump according to claim 3, is characterized in that, described coil (7) is placed in described the first pump housing portion (10a), and the indent circular arc part (81) of described stator iron core (8) stretches out in the first pump housing portion.

6. AC permanent-magnet draining pump according to claim 2, it is characterized in that, described rotator seat (61) is the cylindrical shell of an end opening, and the interior arc-shaped surface (81a) of the indent circular arc part (81) of the stator iron core (8) of the interior arc-shaped surface of cylindrical shell and embedding surrounds the magnetic core containing space that holds described magnetic core jointly.

7. AC permanent-magnet draining pump according to claim 6, is characterized in that, the interior arc-shaped surface of the indent circular arc part (81) of described stator iron core (8) is configured to a part for the internal surface of described rotator seat (17).

8. AC permanent-magnet draining pump according to claim 6, is characterized in that, at least partly interior arc-shaped surface (81a) of the indent circular arc part (81) of described stator iron core (8) is protruded the internal surface (17a) of described rotator seat (17) to axis direction.

9. AC permanent-magnet draining pump according to claim 2, it is characterized in that, described rotor assembly (20) also comprises: starting mechanism, described magnetic core (15) drives described rotating shaft to rotate by starting mechanism, its have the startup cover (93b) fixing with described magnetic core (15) one end and with the fixing axle sleeve of rotating shaft, between described startup cover and axle sleeve, contact by shock reducing structure.

10. AC permanent-magnet draining pump according to claim 9, is characterized in that,

Described axle sleeve (93a) is placed in described startup cover (93b), and its outer wall is provided with at least one limit rib;

Described startup cover (93b) inwall is provided with at least one and starts muscle;

Start between muscle and limit rib and contact by described shock reducing structure, between described startup muscle and described limit rib, there is anti-interference gap, when this anti-interference gap makes to start, starting muscle is at least 220 ° in the maximum idle running angle that contacts described shock reducing structure, contact and promote before described limit rib.