CN110500272A - Electrodynamic pump - Google Patents

Abstract

A kind of electrodynamic pump (1) includes: motor field frame (32)；Adjoin the pump case of motor field frame；The rotor (34) for being contained in motor field frame and axially being supported by rotary shaft (15)；It is set to the radially outside of rotor and is installed on the stator (33) of motor field frame；It is contained in pump case and configures and aspirated and the pump unit of exhaust fluid (10) with the rotation by rotor；And it is set between rotor and stator the cup-shaped housing (60) being introduced into stator to avoid the fluid in pump unit.It is provided between housing and motor field frame containment member (65), and in the communication path (70) compared to containment member closer to the inner side and outer side for being formed with connection housing at the position of the open side of housing between motor field frame and pump case.

Description

Electrodynamic pump

Technical field

The present invention relates to a kind of electrodynamic pumps.

Background technique

Electrodynamic pump is used for, for example, the hydraulic device of transmission device installed on such as vehicle etc supplies hydraulic oil.In In such electrodynamic pump, in order to improve the cooling efficiency of motor unit, a part of the hydraulic oil discharged from electrodynamic pump can lead to Cross the rotor circulation of motor unit.However, motor unit can be interfered when hydraulic oil is introduced into the stator of motor unit Operation.Therefore, in order to avoid hydraulic oil is introduced into stator, be supported in stator and motor unit rotor in rotary shaft it Between be provided with housing (can) (such as JP2015-218650A (documents 1)).

The distance of electrodynamic pump between the stator and the rotor more hour can have higher motor efficiency.Therefore, stator and The housing being arranged between rotor should have thickness as small as possible.Housing be internally configured as different from pump unit with it is outer The enclosure space of the sealing of portion's isolation, so that the hydraulic oil being introduced into rotor will not be discharged towards stator.Therefore, when hydraulic oil from Hydraulic raising when pump unit introduces the inside of housing, in housing.The case where housing is configured to relatively small thickness Under, due to the hydraulic raised influence inside housing, housing can deform.In addition, housing can also be due to deflection Increase and damage.The function of motor unit can be significantly damaged so in electrodynamic pump.

Therefore, a kind of electrodynamic pump for being readily susceptible to that housing is avoided to deform is needed.

Summary of the invention

According to an aspect of the present invention, electrodynamic pump is characterized in that electrodynamic pump includes motor field frame, adjoins motor case The pump case of body, the rotor for being contained in motor field frame and axially being supported by rotary shaft are set on rotor radial outer Side and the stator for being installed on motor field frame are contained in pump case and configure and aspirated and arranged with the rotation by rotor The pump unit of body is released, and is set between rotor and stator the cup-shaped screen being introduced into stator to avoid the fluid in pump unit Set (can) is covered, containment member is wherein provided between housing and motor field frame, and closer compared to containment member The position of the open side of housing is formed with the inside and housing for being connected to housing between motor field frame and pump case The communication path in outside.

Through this construction, by housing and the containment member being set between housing and motor field frame, even if When fluid in pump unit introduces the rotor of motor unit, also it is avoided that the fluid in pump unit introduces stator.Wherein, in electricity In motivation unit, when fluid introduce housing in (rotor) when, Fluid pressure can due to the increase of the amount of fluid in housing and It increases.As a result, through this construction, communication path is formed in the open side of housing to be connected to inside and the housing of housing Outside.By communication path, the fluid for introducing the inside of housing is easy to be discharged into the outside of housing.In this way, because i.e. Make also to be avoided that Fluid pressure is increased when fluid introduces the inside of housing, so, even if when the thickness of housing is smaller Also housing deformation can be effectively prevented from.Therefore, by reducing the thickness of housing, it can increase the motor efficiency of electrodynamic pump.

Another feature is that housing has flange, flange is set on the end of its open side and prolongs radially outward It stretches between motor field frame and pump case, containment member energy flexible deformation and is set between motor field frame and flange, And the flange of housing is configured in the state for having gap with motor field frame against containment member, by reducing gap Form communication path.

Through this construction, the flange of housing is spaced apart against containment member and with motor field frame.Wherein, when hydraulic When being increased due to the increase of the amount of fluid in housing, hydraulic action is in the flange of housing, thus flange compressing sealing structure Part.At this point, flange is close to motor field frame due to containment member flexible deformation.That is, the gap between flange and motor field frame Reduce, and form communication path between flange and the end face of pump case, so as to be connected to housing inside and housing it is outer Side.That is, since fluid can be discharged from communication path, even if being also avoided that in housing when fluid introduces the inside of housing Fluid pressure increase.Therefore, even if the change of housing can be effectively prevented from when housing has the shape of relatively small thickness Shape.

In addition, being set in the state for the end face that flange is pressed against pump case due to housing, the inside of housing is configurable For the enclosure space of sealing.By above-mentioned construction, it is avoided that exogenous impurity is introduced from outside into the inside of housing.

Another feature is that housing has flange, flange is set on the end of its open side and prolongs radially outward It stretches between motor field frame and pump case, containment member energy flexible deformation and is set between motor field frame and flange, And the flange of housing is oppressed by containment member to close communication path.

Through this construction, flange is oppressed by the elastic force of containment member to close communication path.Wherein, when in housing Fluid pressure is not high so that making lid when deforming (in the case where low Fluid pressure), communication path may remain off.That is, Fluid is reduced as few as possible, so that more fluid will not unnecessarily be discharged to the outside of housing.

Detailed description of the invention

Understand that from following detailed description, aforementioned and other feature of the invention, characteristic will be become apparent from referring to attached drawing, In:

Fig. 1 is the cross-sectional view of electrodynamic pump disclosed herein；

Fig. 2 is the cross-sectional view of the major part of electrodynamic pump；

Fig. 3 is the cross-sectional view of the major part of electrodynamic pump；

Fig. 4 is the schematic diagram of housing；And

Fig. 5 is the cross-sectional view according to the major part of the electrodynamic pump of another embodiment.

Specific embodiment

Hereinafter reference will be made to the drawings illustrates embodiment disclosed herein.

As shown in Figure 1, electrodynamic pump 1 includes pump unit 10, motor unit 30 and actuator unit 50.Electrodynamic pump 1 It is such as used as oil pump, supplies hydraulic oil to the transmission device of vehicle.In addition, electrodynamic pump 1, which can be used for supplying, is different from hydraulic oil Fluid.

Pump unit 10 includes pump case 12 and pump cover 11, and it is recessed that there is pump case 12 circle for being formed in one end face to accommodate Portion 18, pump cover 11 cover the end face for being formed with receiving recess portion 18 of pump case 12.Pump case 12 and pump cover 11 are closed by aluminium Gold is made.The bearing hole 19 with the central eccentric for accommodating recess portion 18 is formed in pump case 12.Rotary shaft 15 is inserted into bearing hole 19 In, to rotatably support rotary shaft 15 by bearing hole 19.

Being set to and accommodating the pump 14 in recess portion 18 includes the outer rotor 23 for forming the internal rotor 22 and formation internal tooth of external tooth, interior Rotor 22 and outer rotor 23 are engaged with each other.The outer peripheral surface of outer rotor 23 is supported in receiving recess portion 18 to rotate.Internal rotor 22 press-fittings merge an end for being installed on rotary shaft 15 so as to coaxial with rotary shaft 15.Rotary shaft 15 with installation internal rotor 22 Opposite another end in side stretched out from pump case 12 towards motor unit 30.

Pump chambers 24 are formed between the internal rotor 22 being engaged with each other and the tooth of outer rotor 23, the volumes of pump chambers 24 according to Rotation increases or decreases.Emission path 25 and aspiration path 26 has been consequently formed in pump cover 11, and the hydraulic oil in pump chambers 24 passes through Emission path 25 is discharged, and hydraulic oil is sucked by aspiration path 26.

Motor unit 30 includes annular stator 33 and cylindrical rotor 34, and annular stator 33 and cylindrical rotor 34 accommodate In motor field frame 32, from the inner peripheral surface of stator 33, a preset distance is arranged rotor 34 radially inward, and rotor 34 is axially It is supported in rotary shaft 15.Motor field frame 32 is set as adjoining pump case 12.Stator 33 and rotor 34 with rotary shaft 15 Axis coaxle.Rotor 34 include the rotor core 35 formed by laminated thin electromagnetic steel plate and being contained in formed in rotor core 35 it is more Permanent magnet 36 in a slot.Rotor 34 is set to that stator 33 is radially inner, so as to towards being installed on determining for motor field frame 32 Son 33.

Stator 33 includes the stator core 39 formed by laminated electromagnetic steel plate and the coil support frame for being wound on insulator formation Coil 40 on frame 41.Cylindrical space 37 is formed between the inner circumferential side and rotor 34 of stator 33.

Actuator unit 50 is set to the side opposite with pump unit 10 of motor unit 30.Actuator unit 50 configures For printed circuit board 53 is arranged in drive containment portion 52, electronic component, drive containment are installed on printed circuit board 53 Portion 52 is bonded to each other and to be formed by motor field frame 32 and cover 51.Actuator unit 50 is logical by the coil 40 to stator 33 Electricity generates alternating magnetic field to rotate rotor 34.Internal rotor 22 is rotated by the rotation of rotor 34 via rotary shaft 15, outside Rotor 23 is rotated according to the rotation of internal rotor 22.To which the hydraulic oil for cycling through aspiration path 26 is sucked up to pump chambers 24 and from emission path 25 be discharged.

The housing 60 of (the bottom cylindricality) of cup-shaped as shown in Figure 4 is set in the cylindrical space 37 of rotor 34.Housing 60 are formed by the sheet material of such as non-magnetic material (such as stainless steel) etc, and are formed as the cylindrical shape in bottom.Screen The interior diameter of the outer peripheral diameter and cylindrical space 37 of covering set 60 is essentially identical, and the side surface of housing 60 is set to stator 33 Between rotor 34.That is, rotor 34 is placed in housing 60.Housing 60 has opening in this side of pump unit 10 61 and opening 61 side have flange 62.Flange 62 extend radially outwards in motor field frame 32 and pump case 12 it Between.Containment member 65 is set to flange 62 and motor field frame 32 between the end face 42 of 10 this side of pump unit.Containment member 65 are configured to the O-ring of flexible deformation, for example, containment member 65 is partially accommodated in the circular trough 43 formed in end face 42 In.The flange 62 of housing 60 and the formation gap 73 between the end face of flange 62 42.Housing 60 is protected by flange 62 It holds and pump case 12 is pressed against by the elastic force of containment member 65 in state of the flange 62 against containment member 65 (referring to fig. 2) The end face 27 in 30 this side of motor unit.

When pump 14 rotates and hydraulic oil is sucked up to pump chambers 24, a part circulation of the hydraulic oil in pump chambers 24 By the gap between bearing hole 19 and rotary shaft 15, and introduce in housing 60.When the hydraulic oil introduced in housing 60 Amount is less and housing 60 in it is hydraulic in low-pressure state, as shown in Fig. 2, the flange 62 of housing 60 passes through sealing The end face 27 in 30 this side of motor unit of the pressing pump case 12 of component 65.The inside of housing 60 keeps being in as a result, Different from closed state of the pump unit 10 relative to external sealing.

Meanwhile when hydraulic oil introduce housing 60 in and housing 60 in it is hydraulic during the operation of electrodynamic pump 1 on High pressure conditions are risen to, as shown in figure 3, the hydraulic action of hydraulic oil is in flange 62, and flange 62 is towards motor field frame 32 End face 42 above pushes away containment member 65.At this point, containment member 65 is pressurized and flexible deformation, flange 62 is close to the end of motor field frame 32 Face 42.That is, the gap 73 between flange 62 and the end face 42 of motor field frame 32 reduces, and 70 (communication path of communication gap Example) be formed between flange 62 and the end face 27 of pump case 12, so that the inside of housing 60 (is accommodated rotor 34 Side) it is connected to the outside of housing 60.In this way, communication gap 70 be formed as flange 62 and pump case 12 in motor unit Communication path between the end face 27 of 30 this side.In this way, even if being introduced into housing 60 in hydraulic oil and entering in high pressure conditions When, since hydraulic oil is discharged from communication gap 70 towards the outside of housing 60, avoid hydraulic further in housing 60 It increases.Therefore, even if the deformation of housing 60 can be effectively prevented from when housing 60 has the shape of small thickness.

As shown in Figures 2 and 3, it is formed in gap 72 by the thickness collar 80 bigger than the thickness of motor field frame 32 In state between end face 42 and end face 27, motor field frame 32 and pump case 12 pass through the fixation secured to one another of bolt 81.As a result, It cycles through communication gap 70 and the hydraulic oil reached in the housing 60 outside housing 60 further cycles through gap 72 And it is discharged into outside electrodynamic pump 1.Even if hydraulic oil be discharged into electrodynamic pump 1 it is outer when, for example, being set in oil groove in electrodynamic pump 1 In the case where, since the hydraulic oil being discharged into outside electrodynamic pump 1 is emitted into oil groove, will not go wrong.For example, working as electrodynamic pump 1 When being set to outside oil groove, electrodynamic pump 1 is configurable so that the hydraulic oil being discharged into outside electrodynamic pump 1 returns to oil sump (not shown) or logical It crosses oil circuit footpath (not shown) and returns to aspiration path 26.

In state shown in Fig. 2, when the edge of containment member 65 is defined as height H perpendicular to the length in the direction of flange 62 And it is wide when the magnitude in the gap 73 between the end face 42 of motor field frame 32 and the flange 62 of housing 60 is defined as width T Degree T-phase is set so that " width T/ height H " in the range from 5% to 50% height H.When " width T/ height H " is less than When 5%, gap 73 is too small, and cannot be guaranteed the sufficient magnitude of communication gap 70 when gap 73 is too small, so that hydraulic oil may It cannot suitably be discharged out of housing 60.Meanwhile when " width T/ height H " is more than 50%, containment member 65 is easy from end Slot 43 in face 42 stretches out, and the sealing function of containment member 65 is possible to impaired.

Second embodiment

As shown in figure 5, in a second embodiment, slot 28 is formed in the end face 27 of pump case 12 along the direction that flange 62 extends In, slot 28 forms the communication path 71 of the inside of connection housing 60 and the outside of housing 60.Communication path 71 is connected to electronic Gap 72 between the end face 42 of casing body 32 and the end face 27 of pump case 12.Regardless of hydraulic in housing 60, shielding The inside of set 60 passes through communication path 71 with the outside of housing 60 always and is connected to each other.The hydraulic of housing 60 is introduced as a result, Oil can be discharged into outside electrodynamic pump 1 by communication path 71 and gap 72.Communication path 71 (slot 28) is formed as singular or plural.

In the present embodiment, even if when the amount of the hydraulic oil introduced in housing 60 is less and hydraulic in low-pressure state When middle, hydraulic oil can be discharged into outside housing 60 by communication path 71.Therefore, because hydraulic oil is discharged from communication path 71, Avoid hydraulic raising.Therefore, it even if when the introduction volume of hydraulic oil increases, is able to maintain in low-pressure state in housing 60. The deformation of housing 60 can be effectively prevented from as a result, when the thickness in housing 60 is smaller compared to first embodiment. Therefore, by reducing the thickness of housing 60, the motor efficiency of electrodynamic pump 1 increases.

In addition, in the present embodiment because the inner and outer of housing 60 due to communication path 71 presence and always It communicates with each other, be possible to occur invading exogenous impurity outside electrodynamic pump 1 by communication path 71 and introduce air.Therefore, it is connected to The depth in path 71 (slot 28) can be as small as possible, to avoid the intrusion of exogenous impurity and the introducing of air as far as possible.In addition, being It avoids exogenous impurity from invading outside electrodynamic pump 1, can be installed in the pre-determined bit in the channel that the communication path 71 with electrodynamic pump 1 is connected Set the filter for collecting exogenous impurity.

Other embodiments

(1) although second embodiment elaborates a kind of example, bracket groove 28 be formed in the end face 27 of pump case 12 so as to Communication path 71 is formed, still, slot can also be formed in form communication path 71 in the flange 62 of housing 60, alternatively, slot It can also be formed in 62 the two of end face 27 and flange to form communication path 71.

(2) although embodiment elaborates a kind of exemplary shapes, wherein housing 60 has flange 62, housing 60 can be configured as not having flange 62.In this case, communication path is formed in the end of 60 split shed 61 of housing To be connected to the inside of housing 60 and the outside of housing 60 between at least part and the end face 27 of pump case 12.Access Diameter can for example be formed by the notch in the end of setting 60 split shed 61 of housing, and pump case 12 is arranged alternatively, can pass through End face 27 in slot and formed.In addition, communication path can be in the end face 27 by notch and pump case 12 in housing 60 Both slots formed.

(3) during slot can be formed in one in end face 42 and end face 27 or both, in motor field frame 32 and pump case Between 12, end face 42 and end face 27 are facing with each other, so that outside communication path connection electrodynamic pump 1.In such a case it is not necessary to Gap 72.

The present invention can be widely used in the electrodynamic pump with housing.

It is described above to elaborate the principle of the present invention, preferred embodiment and operational mode.But the present invention will protect Range be not limited to disclosed specific embodiment.In addition, embodiment described herein should be regarded as it is illustrative, rather than limit Property processed.It does not depart from spirit of the invention, can also make a variety of changes, improve and equivalent setting.Correspondingly, it should be noted that Scope of protection of the present invention cover all changes that are as claimed in claim, falling into spirit and scope of the invention, improve with And equivalent setting.

Claims (3)

1. a kind of electrodynamic pump (1), comprising:

Motor field frame (32)；

Pump case, the pump case adjoin the motor field frame；

Rotor (34), the rotor (34) are contained in the motor field frame and are axially supported by rotary shaft (15)；

Stator (33), the stator (33) are set to the radially outside of the rotor and are installed on the motor field frame；

Pump unit (10), the pump unit (10) are contained in the pump case and configure through the rotation of the rotor Suction and exhaust fluid；And

Cup-shaped housing (60), the cup-shaped housing (60) are set between the rotor and the stator to avoid the pump Fluid in unit is introduced into the stator,

Wherein, it is provided between the housing and the motor field frame containment member (65), and

Compared to the containment member closer at the position of the open side of the housing in the motor field frame and institute It states and is formed between pump case communication path (70), the inside of communication path (70) connection housing and the shielding The outside of set.

2. electrodynamic pump as described in claim 1,

Wherein the housing has flange (62), and the flange (62) is set on the end of its open side and in the electricity It is extended radially outwards between motivation shell and the pump case,

It the containment member energy flexible deformation and is set between the motor field frame and the flange, and

The flange of the housing is configured in the state for having gap with the motor field frame against the sealing Component, and the communication path is formed by reducing gap.

3. electrodynamic pump as described in claim 1,

Wherein the housing has flange (62), and the flange (62) is set on the end of its open side and in the electricity It is extended radially outwards between motivation shell and the pump case,

It the containment member energy flexible deformation and is set between the motor field frame and the flange, and

The flange of the housing is oppressed by the containment member to close the communication path.