CN208534782U - Electronic water pump - Google Patents

Abstract

The utility model relates to water pump fields, disclose a kind of electronic water pump, the electronic water pump includes impeller (3) and motor section, the motor section includes the rotor assembly (2) for driving the impeller (3) to rotate, the front end of the shaft (21) of the rotor assembly is arranged in the impeller (3), and the both ends of the shaft (21) are installed on the motor section by rolling bearing (4).The electronic water pump of the utility model is due to that can solve the problems, such as that impeller and rotor assembly are easy to happen axial motion during electronic water pump runs at high speed using rolling bearing.This is because rolling bearing is generally made of outer ring, inner ring, rolling member and retainer.Wherein, in shaft during running at high speed, stress is concentrated mainly on the rolling member of rolling bearing, and the inner ring impeller and rotor assembly without causing rolling bearing easily are easy to happen axial motion, so that the stability of motor is higher, the service life is longer.

Description

Electronic water pump

Technical field

The utility model relates to water pump fields, and in particular, to a kind of electronic water pump.

Background technique

Currently, electronic water pump thoroughly realizes electronization from controlling to driving, compared to traditional mechanical water pump with electricity Sub- integrated system fully controls liquid transmission, to realize the adjustability of liquid transmission, accuracy.Due to system integration, again Not using Mechanical Driven, main part water pump uses micro pump in addition, and making whole system truly realizes micromation, institute Miniature electronic water pump is called with electronic water pump.

Existing electronic water pump, due to sliding bearing reliable operation, general with characteristics, the electronic water pump such as at low cost without making an uproar All over the forms of motion using sliding bearing, still, in electronic water pump work, since the shaft impeller of motor is in pump case Rotation, in the lower section of impeller, (i.e. between impeller and drive end bearing bracket) will form negative pressure at this time, operate in the height of negative pressure and shaft Cheng Zhong can make shaft and impeller that certain axial motion phenomenon can occur, unstable so as to cause the work appearance of motor Phenomenon affects the service life of motor.

Utility model content

It can effectively solve rotor the purpose of the utility model is to provide a kind of electronic water pump and axial string occur for impeller Dynamic problem.

To achieve the goals above, the utility model provides a kind of electronic water pump, and the electronic water pump includes impeller and electricity Machine portion, the motor section include the rotor assembly for driving the impeller rotation, and the impeller is arranged in the rotor assembly Shaft front end, the both ends of the shaft are installed on the motor section by rolling bearing.

Preferably, the rolling bearing and the shaft form interference fit installation.

Preferably, the motor section includes drive end bearing bracket and rear end cap, is respectively equipped on the drive end bearing bracket and the rear end cap Rolling bearing mounting groove.

Preferably, the drive end bearing bracket and rear end cap are moulding.

Preferably, the motor section include the rotor assembly, the external stator being arranged in outside the rotor assembly and For separating the separation sleeve of the rotor assembly and the external stator, the separation sleeve and the drive end bearing bracket are integrally formed, described The inner cavity of separation sleeve is formed as the rotor installation cavity for installing the rotor assembly, and the rolling bearing is arranged in the rotor The both ends of installation cavity.

Preferably, the drive end bearing bracket is equipped with as inlet and is connected to the drive end bearing bracket through-hole of the rotor installation cavity, institute Stating shaft is hollow shaft, and the hollow axocoel of the hollow shaft is apocenosis passage.

Preferably, the rear end cap is formed with the flange part being plugged in the separation sleeve, the rolling bearing mounting groove It is arranged in the flange part.

Preferably, to be provided with rotor chamber between the internal perisporium of the rear end of the separation sleeve and the periphery wall of the flange part close Seal.

Preferably, the junction of the rear end cap and the drive end bearing bracket is provided with end cap seal circle.

Preferably, the electronic water pump further includes the pump that cover is buckled in the front end of the impeller and is fixed on the drive end bearing bracket Lid, the pump cover are equipped with coolant inlet.

Through the above technical solutions, in the electronic water pump of the utility model, it is existing due to being replaced using rolling bearing Sliding bearing can solve impeller and rotor assembly during electronic water pump runs at high speed and be easy to happen asking for axial motion Topic.This is because rolling bearing is generally made of outer ring, inner ring, rolling member and retainer.The wherein effect of inner ring is and rotor The shaft of assembly matches to merge to be rotated together with shaft, and outer ring effect is that (rolling bearing is pacified with the bearing mounting base of rolling bearing At tankage) it matches, it plays a supporting role, rolling member is that rolling element is uniformly distributed in inner ring and outer ring by means of retainer Between, shape size and quantity directly affect service performance and the service life of rolling bearing, and retainer can make rolling member uniform Distribution, prevents rolling drop, and guidance rolling member has rotated lubricating action.Wherein, during running at high speed, should advocate in shaft It concentrates on the rolling member of rolling bearing, the inner ring impeller and rotor assembly without causing rolling bearing easily are easy Axial motion occurs, so that the stability of motor is higher.

Other features and advantages of the utility model will the following detailed description will be given in the detailed implementation section.

Detailed description of the invention

Attached drawing is to be used to provide a further understanding of the present invention, and constitute part of specification, and following Specific embodiment be used to explain the utility model together, but do not constitute limitations of the present invention.In the accompanying drawings:

Fig. 1 is the top view according to the electronic water pump of specific embodiment of the present utility model；

Fig. 2 is the cross-sectional view of the section C-C in Fig. 1；

Fig. 3 is the perspective view of rolling bearing (a kind of ball bearing).

Description of symbols

1 rotor chamber sealing ring, 2 rotor assembly

3 impeller, 4 rolling bearing

5 external stator, 6 drive end bearing bracket

7 rear end cap, 8 end cap seal circle

9 rotor installation cavity, 10 stator installation cavity

21 shaft, 61 separation sleeve

The hollow axocoel of 71 flange part 210

Specific embodiment

Specific embodiment of the present utility model is described in detail below in conjunction with attached drawing.It should be understood that herein Described specific embodiment is only used for describing and explaining the present invention, and is not intended to limit the utility model.

In the present invention, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom " is usually Be for direction shown in the drawings either for it is vertical, vertically or on gravity direction for each component mutual alignment Relationship description word.

The utility model provides a kind of electronic water pump, and referring to figure 1 and figure 2, which includes impeller 3 and electricity Machine portion, motor section includes the rotor assembly 2 for driving impeller 3 to rotate, before the shaft 21 of rotor assembly 2 is arranged in impeller 3 The both ends at end, shaft 21 are installed on motor section by rolling bearing 4.

It therefore,, can due to replacing existing sliding bearing using rolling bearing 4 in the electronic water pump of the utility model To solve the problems, such as that impeller 3 and rotor assembly 2 are easy to happen axial motion during electronic water pump runs at high speed.This be because For shown in Figure 3, rolling bearing 4 is generally made of outer ring, inner ring, rolling member and retainer.Wherein the effect of inner ring be with The shaft 21 of rotor assembly 2 matches to merge to be rotated together with shaft 21, and outer ring effect is the bearing mounting base with rolling bearing 4 (at the rolling bearing mounting groove in such as Fig. 2) matches, and plays a supportive role, and rolling member will be uniformly rolled by means of retainer Body is distributed between inner ring and outer ring, and shape size and quantity directly affect service performance and the service life of rolling bearing 4, is protected Holding frame can be such that rolling member is uniformly distributed, and prevent rolling drop, and guidance rolling member has rotated lubricating action.Wherein, in shaft 21 During running at high speed, stress is concentrated mainly on the rolling member of rolling bearing 4, without causing in rolling bearing 4 easily Circle impeller 3 and rotor assembly 2 are easy to happen axial motion, so that the stability of motor is higher.

Wherein, it should be pointed out that rolling bearing 4 should be preferably corrosion resistant rolling bearing, preferably corrosion resistant rolling Pearl bearing (more adapts to the shaft 21 to run at high speed), shown in Figure 3.

Further, to ensure that rolling bearing 4 more preferably solves the problems, such as above-mentioned axial motion, rolling bearing 4 and shaft 21 form interference fit installation.This is because in contrast, the peripheral part and bearing mounting base of existing sliding bearing used It is full of and is coupled, but the inner peripheral portion of sliding bearing and shaft 21 cannot be set as interference to ensure to rotate, and usually gap Cooperation.And in the present invention, 4 Internal and external cycle of rolling bearing is all using the mounting means of interference fit, so that shaft 21 Cooperate with rolling bearing 4 more stable, and shaft 21 can be prevented toward left front play back and forth.

As shown in Fig. 2, motor section includes drive end bearing bracket 6 and rear end cap 7, the axis of rolling is respectively equipped on drive end bearing bracket 6 and rear end cap 7 Mounting groove is held, in order to which rolling bearing 4 is more easily installed in place.Wherein, there is also have a Dingan County with rear end cap 7 for rolling bearing 4 Gap is filled, to avoid rolling bearing 4 and friction phenomenon occurs as between the rear end cap 7 of casing.

In the electronic water pump of the utility model, the moulding of drive end bearing bracket 6 and the both preferably plastics PPS material of rear end cap 7, It is easy to process, it is more conducive to reduce the production cost for using material, casting can also be respectively adopted in certain drive end bearing bracket 6 and rear end cap 7 Forging piece, such as aluminium alloy or cast iron etc..

Wherein, motor section includes rotor assembly 2, the external stator being arranged in outside rotor assembly 25 and for separates rotor The separation sleeve 61 of assembly 2 and external stator, separation sleeve 61 and drive end bearing bracket 6 are integrally formed, and the inner cavity of separation sleeve 61 is formed as pacifying The rotor installation cavity 9 of cartridge rotor assembly 2, the outside of separation sleeve 61 are formed with the stator installation cavity 10 for installing external stator 5, rolling The both ends of rotor installation cavity 9 are arranged in dynamic bearing 4.Wherein, separation sleeve 61 can be there are many setting form appropriate, it is preferable that Referring to Fig. 2, separation sleeve 61 forms one with drive end bearing bracket 6 by injection molding or casting, in this way, can all be coated on rotor assembly 2 In the separation sleeve 61, and setting is isolated with external stator 5 in rotor assembly 2, plays good buffer action.In addition, separation sleeve 61 Integrated injection molding or casting and forming, strong operability and production technology are also relatively simple and help to reduce number of parts, can be into one Walk save the cost.

At the same time, in the electronic water pump of the utility model, drive end bearing bracket 6 is equipped with as inlet and is connected to rotor installation The drive end bearing bracket through-hole of chamber 9, shaft 21 are hollow shaft, and the hollow axocoel 210 of the hollow shaft is apocenosis passage.In this way, in electronic water When pump work, 21 impeller 3 of shaft rotates in pump case (not shown), at this time in lower section (i.e. impeller 3 and the front end of impeller 3 Between lid 6) it will form negative pressure, the coolant liquid in pump case (not shown) can be made to be pressed into motor by the drive end bearing bracket through-hole on front shroud Inside, and then coolant liquid is made to flow through the gap between separation sleeve 61 and rotor assembly 2, then pass through the connection knot on rear end cap 3 Structure enters in the hollow axocoel 210 of shaft 21, goes out coolant liquid from the conduct for the shaft 21 being located in pump case (not shown) 210 one end of hollow axocoel of liquid mouth is discharged.In this way, coolant liquid can be made in the liquid communication area internal circulation flow and take away production of having a try Raw heat, to play the role of cooling motor inner rotator assembly 2 and internal electric-controlled plate.

As shown in Fig. 2, rear end cap 7 is formed with the flange part 71 being plugged in separation sleeve 61, the setting of rolling bearing mounting groove In flange part 71, so that bearing installation is not in eccentric phenomena, mounting structure is reliable and stable.

At the same time, to further ensure that the isolation effect between rotor assembly 2 and external stator 5 to ensure external stator 5 The leakproofness of water proof effect and cooling water channel, in this regard, the periphery wall of the internal perisporium of the rear end of separation sleeve 61 and flange part 71 it Between be provided with rotor chamber sealing ring 1.

Also, the junction of rear end cap 7 and drive end bearing bracket 6 is provided with end cap seal circle 8, to ensure rear end cap 7 and drive end bearing bracket 6 Between connection sealing, can avoid motor section in coolant liquid leak out while, can also prevent outside electronic water pump The liquid inside that enters motor section coolant liquid in.

In general, electronic water pump further includes the pump cover (not shown) that cover is buckled in the front end of impeller 3 and is fixed on drive end bearing bracket 6, Pump cover (not shown) is equipped with coolant inlet.In this way, shaft 21 drives the impeller 3 of front end when the operating of the motor of electronic water pump Rotation, so that entering and flowing to the inside of motor, impeller 3 from the coolant inlet in pump cover (not shown) from external coolant liquid Water circulation can be driven to flow, finally play the heat dissipation effect of recirculated water cooling.

Preferred embodiments of the present invention, still, the utility model and unlimited are described in detail in conjunction with attached drawing above Detail in above embodiment can be to the skill of the utility model in the range of the technology design of the utility model Art scheme carries out a variety of simple variants, these simple variants belong to the protection scope of the utility model.

It is further to note that specific technical features described in the above specific embodiments, in not lance In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the utility model is to each No further explanation will be given for the possible combination of kind.

In addition, any combination can also be carried out between a variety of different embodiments of the utility model, as long as it is not disobeyed The thought for carrying on the back the utility model, equally should be considered as content disclosed in the utility model.

Claims (10)

1. a kind of electronic water pump, which is characterized in that the electronic water pump includes impeller (3) and motor section, and the motor section includes Rotor assembly (2) for driving the impeller (3) to rotate, shaft of impeller (3) setting in the rotor assembly (2) (21) both ends of front end, the shaft (21) are installed on the motor section by rolling bearing (4).

2. electronic water pump according to claim 1, which is characterized in that the rolling bearing (4) and the shaft (21) shape It is installed at interference fit.

3. electronic water pump according to claim 1 or 2, which is characterized in that the motor section includes drive end bearing bracket (6) and rear end It covers (7), is respectively equipped with rolling bearing mounting groove on the drive end bearing bracket (6) and the rear end cap (7).

4. electronic water pump according to claim 3, which is characterized in that the drive end bearing bracket (6) and rear end cap (7) are injection molding Part.

5. electronic water pump according to claim 3, which is characterized in that the motor section includes the rotor assembly (2), sets Set the external external stator (5) of the rotor assembly (2) and for separate the rotor assembly (2) and the external stator every From set (61), the separation sleeve (61) and the drive end bearing bracket (6) are integrally formed, and the inner cavity of the separation sleeve (61) is formed as being used for The rotor installation cavity (9) of the rotor assembly (2) is installed, the rolling bearing (4) is arranged the two of the rotor installation cavity (9) End.

6. electronic water pump according to claim 5, which is characterized in that the drive end bearing bracket (6) is equipped with as inlet simultaneously It is connected to the drive end bearing bracket through-hole of the rotor installation cavity (9), the shaft (21) is hollow shaft, the hollow axocoel of the hollow shaft It (210) is apocenosis passage.

7. electronic water pump according to claim 5, which is characterized in that the rear end cap (7) be formed be plugged in it is described every From the flange part (71) in set (61), the rolling bearing mounting groove setting is in the flange part (71).

8. electronic water pump according to claim 7, which is characterized in that the internal perisporium of the rear end of the separation sleeve (61) and institute It states and is provided with rotor chamber sealing ring (1) between the periphery wall of flange part (71).

9. electronic water pump according to claim 3, which is characterized in that the company of the rear end cap (7) and the drive end bearing bracket (6) The place of connecing is provided with end cap seal circle (8).

10. electronic water pump according to claim 3, which is characterized in that the electronic water pump further includes that cover is buckled in the leaf The pump cover taking turns the front end of (3) and being fixed on the drive end bearing bracket (6), the pump cover are equipped with coolant inlet.