CN209781304U - Centrifugal pump - Google Patents

Abstract

The utility model relates to a centrifugal pump, including the water pump shell, the water conservancy diversion awl, the bearing is kept apart to the water cavity, the water pump impeller, the water pump shell sealing washer, motor casing, rotor cover front end sealing washer, the rotor cover, motor stator, the controller housing, a control circuit board, the controller end cover, rotor shaft rear bearing, the rotor shaft, electric motor rotor, rotor cover rear end sealing washer, the motor casing sealing washer, rotor shaft front bearing, impeller fixed pin and supply socket, driving motor and drive controller are equipped with on the centrifugal pump, the inside forced cooling system that is provided with of centrifugal pump carries out forced cooling to motor and drive controller. The centrifugal pump is simple in structure and ingenious in design, the temperature rise of the motor and the controller is effectively inhibited by designing the internal forced cooling water way in the centrifugal pump, the overheating of the motor and the controller is avoided, and the centrifugal pump has high working reliability.

Description

Centrifugal pump

Technical Field

the utility model relates to a centrifugal pump, especially be applied to an electric centrifugal pump of automobile cooling system.

Background

The cooling water pump applied to the automobile cooling system basically adopts a centrifugal water pump, along with the development of an electric automobile, power components such as a driving motor and a power battery of the electric automobile need to be cooled by the cooling system to ensure the working performance and the working reliability of the cooling water pump, the cooling system of the electric automobile does not have a mechanical water pump driven by an engine of a traditional fuel automobile, the electric cooling water pump driven by electric power becomes the primary choice, the motor and a motor controller for driving the motor to work can generate heat in the working process, the working reliability of the electric water pump is influenced, on the other hand, the loss of the water pump in the working process is controlled, and the improvement of the working efficiency of the water pump is always one target of water pump research and development.

The chinese patent with publication number CN208311139U discloses a heat dissipation centrifugal pump, including bearing platform and centrifugal pump motor housing, the upper end external surface fixed connection of bearing platform has centrifugal pump impeller base, and the upper end external surface fixed mounting of centrifugal pump impeller base has centrifugal pump impeller shell, the front end external surface fixed connection of centrifugal pump impeller shell has No. two pipelines, and the one end external surface fixed connection of No. two pipelines has a delivery port interface, one side external surface fixed connection of centrifugal pump impeller shell has a pipeline, and the one end external surface fixed connection of a pipeline has a water inlet interface. This heat dissipation centrifugal pump, be equipped with heat dissipation electric motor, condensate pipeline and temperature control panel, can carry out the heat dissipation when the temperature is lower, and can carry out the secondary heat dissipation when the temperature is higher, can prevent the high temperature at last, damage the centrifugal pump, but heat dissipation centrifugal pump need additionally set up heat dissipation electric motor and condensate pipeline, not only make the structure of pump become more complicated, and the inside radiating effect of centrifugal pump is not good moreover, simultaneously because additionally set up heat dissipation electric motor, the whole energy consumption of centrifugal pump is high, the loss is big in the working process.

SUMMERY OF THE UTILITY MODEL

to the not enough of prior art, the utility model provides a low-loss centrifugal pump with good radiating effect.

In order to realize the above technical scheme, the utility model provides a centrifugal pump, include: the water inlet is formed in the front end face of the motor shell, the boss is arranged on the front end face of the motor shell, the boss is provided with a notch, and the boss at the front end of the motor shell extends into the cavity of the water pump shell; the rotor shaft is arranged in the motor shell, a rotor shaft through hole penetrating through the rotor shaft is formed in the axis of the rotor shaft, and a plurality of radial through holes are formed in the front end of the rotor shaft; the motor rotor is arranged on the rotor shaft, a plurality of cooling water channels are arranged inside the motor rotor, the rotor sleeve is arranged in an inner cavity of the motor stator, a through hole is formed inside the rotor sleeve, the motor rotor is arranged in the through hole inside the rotor sleeve, and a gap is formed between the outer circle of the motor rotor and the inner hole of the rotor sleeve; the motor stator is arranged in the motor shell and matched with the motor rotor; the controller housing is fixed at the rear end of the motor shell, a bearing seat for assembling a rotor shaft is arranged in the middle of the front end of the controller housing, a notch is formed in the bearing seat, and the control circuit board is installed in the controller housing; a water pump housing fixed in front of the motor housing; the water pump impeller is arranged at the front end of the rotor shaft and positioned in the water pump shell, a corner is arranged at the mixing position of the water inlet flow direction of the water inlet of the water pump shell and the water inlet flow direction of the front end of the water pump impeller, a small platform which enables water flow to be extruded towards the corner is arranged at the corner of the water inlet section of the water pump shell, and an auxiliary water inlet is arranged at the water inlet of the water pump impeller; the bottom surface of the guide cone is provided with guide grooves with the same number as the radial through holes at the front end of the rotor shaft, and the guide grooves are communicated with the radial through holes at the front part of the rotor shaft in a one-to-one correspondence manner; install in the water pump casing and be located the water cavity isolation bearing of water pump impeller water inlet department, the water cavity isolation bearing separates into high-pressure water cavity and low pressure water cavity with the water pump casing.

preferably, both ends are equipped with sealed lid around the bearing is kept apart to the water cavity, and the bearing is kept apart to the water cavity is a rolling ball bearing, and the bearing inner race tight fit ground of bearing is kept apart to the water cavity is fixed in the water pump casing, and water pump impeller's water inlet department is provided with a boss, and water cavity behind the water pump impeller and the high-pressure water cavity intercommunication in the water pump casing, the pressure differential between the water cavity behind the water pump impeller and the water pump impeller's water inlet low-pressure cavity makes the water pump impeller to form an axial laminating force to the terminal surface of water cavity isolation bearing, and water pump impeller's water inlet boss supports and leans on the rear end face of the bearing inner circle of.

Preferably, the step is arranged in the inner cavity hole of the motor shell, the mounting lug of the front-end sealing ring of the rotor sleeve is arranged on the inner end face of the motor shell, the front-end sealing ring of the rotor sleeve is sleeved on the mounting lug of the sealing ring of the motor shell, a bearing seat for mounting a front bearing of the rotor shaft is arranged at the axis position on the inner end face of the motor shell, and the mounting lug of the front-end sealing ring of the rotor sleeve and the bearing seat inside the motor shell are arranged around the water passing hole of the motor shell and connected with each other.

Preferably, the water pump impeller is provided with a pin mounting hole, the rotor shaft is also provided with a pin mounting hole, the impeller fixing pin is tightly fitted into the water pump impeller pin mounting hole and the rotor shaft pin mounting hole through a notch arranged on a boss at the front end of the motor shell, and the impeller fixing pin transmits the driving torque of the rotor shaft to the water pump impeller to drive the water pump impeller to rotate.

preferably, the motor stator is fixed in the inner cavity mounting hole of the motor shell, the front end face of the stator of the motor stator abuts against the step of the inner cavity hole of the motor shell, a protrusion parallel to the longitudinal axis of the motor stator is arranged on the surface of the motor stator, the same protrusion is also arranged on the sheath flange of the motor stator, and the longitudinal protrusion on the surface of the motor stator is clamped into a longitudinal groove on the inner cavity hole wall of the motor shell.

preferably, the sheath of the motor stator is provided with a mounting lug of the coil wiring support, a mounting hole of the coil wiring support is formed in the lug, a front end plug of the coil wiring support is inserted into the mounting hole of the coil wiring support on the motor stator sheath in a tight fit mode, a rear end plug of the coil wiring support penetrates through a through hole in the controller housing backwards and then is inserted into a corresponding connecting hole of the control circuit board and is welded firmly, and the protrusion on the sheath flange of the motor stator is flush with the longitudinal protrusion on the outer surface of the motor stator.

Preferably, an outer edge boss with a sealing ring mounting groove is arranged on the front end face of the controller housing, the front end outer edge boss of the controller housing extends into a rear end hole of the motor housing, the motor housing sealing ring is mounted in the sealing ring mounting groove of the front end outer edge boss of the controller housing, a sealing ring mounting lug is arranged inside the front end outer edge boss of the controller housing, and a sealing ring at the rear end of the rotor housing is mounted in the sealing ring mounting lug.

Preferably, a reinforcing rib is arranged between the sealing ring mounting lug on the controller housing and the bearing seat and connected with each other, a step is arranged on a spigot inside the bearing seat of the controller housing, a rear bearing of the rotor shaft is arranged in the spigot inside the bearing seat of the controller housing, the rear end face of the rear bearing of the rotor shaft abuts against the spigot step inside the bearing seat of the controller housing, a plurality of protruding reinforcing ribs are arranged on the outer end face of an outer edge boss at the front end of the controller housing, a fixing screw hole of a power socket, a lug and a mounting hole of the power socket are arranged on the front end face of the controller housing, the power socket is arranged in a power socket mounting hole on the controller housing and fastened by screws, the control circuit board is arranged in the controller housing in a screw fastening mode, and the bottom face of the control circuit board abuts against the rear end face.

preferably, the center of the bottom of the guide cone is provided with a counter bore, the counter bore of the bottom of the guide cone is sleeved on the excircle of the front end of the rotor shaft in a tight fit manner, the bottom surface of the guide cone is abutted against the end surface of the shaft hole of the water pump impeller, and the guide grooves on the bottom surface of the guide cone are correspondingly faced to the water suction ports of the impeller blades of the water pump impeller one by one.

Preferably, the orifices of the front end and the rear end of the rotor sleeve are provided with step rabbets, the step rabbets of the orifices of the front end of the rotor sleeve are tightly sleeved on the outer edge of the sealing ring of the front end of the rotor sleeve, the step rabbets of the orifices of the rear end of the rotor sleeve are tightly sleeved on the outer edge of the sealing ring of the rear end of the rotor sleeve, a plurality of protruding reinforcing ribs parallel to the longitudinal axis of the rotor sleeve are uniformly distributed on the surface of the outer circle of the rotor sleeve, the longitudinal protruding reinforcing ribs of the rotor sleeve are respectively inserted into magnetic pole gaps of a stator core of a motor stator, and a gap is formed between the outer circle of the motor rotor and an inner hole of.

In the technical scheme, the water through hole on the front end face of the motor shell, the water cavity from the front end face of the motor rotor to the inner end face of the motor shell, the cooling water channel inside the motor rotor, the gap between the excircle of the motor rotor and the inner hole of the rotor sleeve, the water cavity from the rear end face of the motor rotor to the end face of the mounting lug of the sealing ring at the rear end of the rotor sleeve on the controller housing, the inner water cavity of the mounting lug of the sealing ring at the rear end of the rotor sleeve on the controller housing, the notch of the bearing seat on the controller housing, the inner cavity of the bearing seat on the controller housing, the axle center through hole of the rotor shaft, the radial through hole at the front part of the rotor shaft, the flow guide groove on the bottom surface of the flow guide cone, the low-pressure water cavity of the water suction port of the.

the utility model provides a pair of centrifugal pump's beneficial effect lies in: the centrifugal pump has simple structure and ingenious design, water in the high-pressure water cavity in the water pump shell enters the water cavity between the front end surface of the motor rotor and the inner end surface of the motor shell from the water through hole on the front end surface of the motor shell through the water cavity behind the impeller of the water pump by utilizing the pressure difference generated between the low-pressure water cavity and the high-pressure water cavity when the water pump works, then enters the water cavity between the rear end surface of the motor rotor and the end surface of the mounting lug of the sealing ring at the rear end of the rotor sleeve on the controller housing and the inner water cavity of the mounting lug of the sealing ring at the rear end of the rotor sleeve on the controller housing through the gap of the bearing seat on the controller housing, then enters the inner cavity of the bearing seat on the controller housing through the gap of the bearing seat on the controller housing and flows to the front end of the rotor shaft along the axis through hole of the rotor shaft, then enters a water suction port low-pressure water cavity of a water pump impeller from a radial through hole at the front part of the rotor shaft through a flow guide groove on the bottom surface of a flow guide cone, and is pumped into a high-pressure water cavity in a water pump shell together with inlet water from a water inlet of the water pump shell by the water pump impeller to realize the circulating flow of internal cooling water, a rotor sleeve conducts heat of a motor stator into the internal cooling water, a controller housing conducts heat of a control circuit board attached to the rear end surface of an inner cavity of the controller housing into the internal cooling water, the circulating water flow of the internal forced cooling takes away heat of an internal high-temperature structural part to realize the forced cooling of the internal high-temperature structural part of the electric centrifugal pump, the surface added on the motor housing naturally dissipates heat of the motor stator and the external surface of the controller housing and the external surface of the controller end cover to the control, avoid the overheated of motor and controller, have higher operational reliability.

Drawings

FIG. 1 is a sectional view of the centrifugal pump of the present invention;

FIG. 2 is a schematic perspective view of the centrifugal pump of the present invention;

Fig. 3 is an inside view of the motor housing of the present invention;

Fig. 4 is an outside view of the motor housing of the present invention;

Fig. 5 is a schematic perspective view of a guide cone with a guide groove on the bottom surface;

fig. 6 is a schematic perspective view of a guide cone without a guide groove on the bottom surface;

Fig. 7 is the perspective view of the water pump impeller provided with the guiding gutter on the end surface of the shaft hole.

Fig. 8 is a schematic perspective view of the rotor sleeve according to the present invention.

fig. 9 is a schematic perspective view of the motor stator according to the present invention.

Fig. 10 is a schematic perspective view of a controller housing according to the present invention.

Wherein: 1. a water pump housing; 2. a flow guide cone; 3. a water cavity isolation bearing; 4. a water pump impeller; 5. a water pump shell sealing ring; 6. a motor housing; 7. a rotor sleeve front end sealing ring; 8. a rotor housing; 9. a motor stator; 10. a controller housing; 11. a control circuit board; 12. a controller end cap; 13. a rotor shaft rear bearing; 14. a rotor shaft; 15. a motor rotor; 16. a rotor sleeve rear end sealing ring; 17. a motor shell sealing ring; 18. a rotor shaft front bearing; 19. an impeller fixing pin; 20. a power socket; 1-1, a small platform at the corner of the water inlet section of the water pump shell; 1-2, a water inlet of a water pump shell; 1-3, an auxiliary water inlet on the water pump shell; 1-4, a water inlet of a water pump impeller; 1-5, a high-pressure water cavity in the water pump shell; 2-1, forming a counter bore at the bottom of the flow guide cone; 2-2, a diversion trench on the bottom surface of the diversion cone; 4-1, pin mounting holes of the water pump impeller; 4-2, a diversion trench on the end face of the water pump impeller shaft hole; 4-3, a water inlet boss of the water pump impeller; 6-1, water through holes on the front end surface of the motor shell; 6-2, a ring rib on the outer surface of the motor shell; 6-3, connecting the top of the motor shell with longitudinal reinforcing ribs at the front end and the rear end; 6-4, a small fixing bracket of the motor shell is connected to a longitudinal reinforcing rib at the rear end of the motor shell; 6-5, longitudinal reinforcing ribs connected to the front end and the rear end of the motor shell above the large fixed support of the motor shell; 6-6, a small fixed support of the motor shell; 6-7, a large fixed support of the motor shell; 6-8, longitudinal grooves on the hole wall of the inner cavity of the motor shell; 6-9, inner cavity hole steps of the motor shell; 6-10 parts of the inner end surface of the motor shell; 6-11, and mounting lugs of a sealing ring at the front end of a rotor sleeve in the motor shell; 6-12, bearing seats in the motor shell; 6-13 and a boss on the front end face of the motor shell; 6-14, and a boss notch on the front end face of the motor shell; 6-15, and a boss notch on the front end face of the motor shell; 8-1, step rabbets of front and rear end orifices of the rotor sleeve; 8-2, convex reinforcing ribs on the surface of the outer circle of the rotor sleeve; 9-1, longitudinal bulges are arranged on the outer surface of the motor stator; 9-2, protrusions on a motor stator sheath flange; 9-3, mounting lugs of a coil wiring bracket on a motor stator sheath; 9-4, installing holes of coil wiring brackets on the motor stator sheath; 9-5, a front end plug of the coil wiring bracket; 9-6, a rear end plug of the coil wiring bracket; 10-1, an outer edge boss on the front end face of the controller housing; 10-2, installing a lug on a sealing ring inside a boss at the outer edge of the front end of the controller housing; 10-3, a notch on a bearing seat of a controller housing; 10-4, connecting a sealing ring mounting lug and a reinforcing rib of a bearing seat on the controller housing; 10-5, steps on the inner spigot of the bearing seat of the controller housing; 10-6, a bearing seat on the controller housing; 10-7, convex reinforcing ribs on the outer side end face of the boss at the outer edge of the front end of the controller housing; 10-8, fixing screw holes and lugs of a power socket on the controller housing; 10-9, mounting holes of a power socket on the controller housing; 12-1, reinforcing ribs on the outer surface of the controller end cover; 14-1, rotor shaft through holes; 14-2, pin mounting holes on the rotor shaft; 14-3, a radial through hole at the front end of the rotor shaft; 15-1, a cooling water channel inside the motor rotor; 15-2, and a gap between the outer circle of the motor rotor and the inner hole of the rotor sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art without any inventive step are within the scope of the present invention.

Example (b): a centrifugal pump.

referring to fig. 1 to 10, a centrifugal pump comprises a water pump housing 1, a diversion cone 2, a water cavity isolation bearing 3, a water pump impeller 4, a water pump housing seal ring 5, a motor housing 6, a rotor housing front end seal ring 7, a rotor housing 8, a motor stator 9, a controller housing 10, a control circuit board 11, a controller end cover 12, a rotor shaft rear bearing 13, a rotor shaft 14, a motor rotor 15, a rotor housing rear end seal ring 16, a motor housing seal ring 17, a rotor shaft front bearing 18, an impeller fixing pin 19 and a power socket 20, wherein the water pump housing 1 is fixed on the motor housing 6 in a screw connection mode, the water pump housing seal ring 5 seals a joint surface of the water pump housing 1 and the motor housing 6, a water inlet flow direction of a water pump housing water inlet 1-2 and a front end water inlet flow direction of the water pump impeller 4 form a corner, and a small platform 1-1 (with a function of extruding water flow towards the corner is arranged at the corner of a water Referring to fig. 2), an auxiliary water inlet 1-3 is arranged on the water pump shell at the section of the water inlet 1-4 of the water pump impeller 4, and the water flow at the auxiliary water inlet 1-3 faces to the turning vortex area of the water inlet section of the water pump shell, so that the water inlet vortex is inhibited to the maximum extent, and the flow loss of the inlet water is reduced;

Referring to fig. 1 and 5, a diversion cone 2 is arranged at the axis of the water inlet of the water pump impeller 4 to guide water flow, so that the water flow at the water inlet of the water pump impeller 4 is distributed more uniformly, the rotary vibration of the water pump impeller 4 is reduced, and the working reliability and the water pumping efficiency of the water pump impeller 4 are improved; the water inlet 1-4 of the impeller in the water pump shell 1 is provided with a water cavity isolation bearing 3 for isolating a high-pressure water cavity 1-5 and a low-pressure water cavity 1-4, the front end and the rear end of the water cavity isolation bearing 3 are provided with sealing covers, the water cavity isolation bearing 3 is a rolling ball bearing, known by known materials, the axial rolling friction coefficient of the rolling ball bearing is 0.004, the friction coefficient of liquid at different temperatures and different viscosities is 0.001-0.010, the influence of the water cavity isolation bearing 3 on friction loss can be known, the bearing outer ring of the water cavity isolation bearing 3 is fixed in the water pump shell 1 in a tight fit manner, the water inlet of the water pump impeller 4 is provided with a boss 4-3, the water cavity behind the water pump impeller 4 is communicated with the high-pressure water cavity 1-5 in the water pump shell 1, and the pressure difference between the water cavity behind the water pump impeller 4 and the low-pressure water inlet cavity of the water pump impeller 4 enables the water pump impeller 4 to form a boss on the end face of the water Due to the axial attaching force, the boss 4-3 of the water inlet of the water pump impeller 4 abuts against the rear end face of the bearing inner ring of the water cavity isolation bearing 3, the isolation of the high-pressure water cavity 1-5 and the low-pressure water cavity 1-4 in the water pump is realized, the water in the high-pressure water cavity 1-5 is prevented from flowing back to the low-pressure water cavity 1-4 through a gap between the water pump impeller 4 and the water pump shell 1, and the energy loss and the flow loss caused by backflow are reduced;

Referring to fig. 1, 3 and 4, a plurality of water through holes 6-1 are arranged on the front end surface of the motor housing 6, a plurality of annular ribs 6-2 are arranged on the outer surface of the motor housing 6, longitudinal reinforcing ribs 6-3 connected with the front end and the rear end of the motor housing 6 are arranged between front screw hole flanges and rear screw hole flanges at the top of the motor housing 6, longitudinal reinforcing ribs 6-4 connected with the rear end of the motor housing 6 are arranged at small fixing supports 6-6 of the motor housing 6, longitudinal reinforcing ribs 6-5 connected with the front end and the rear end of the motor housing 6 are arranged on the outer surface of the motor housing 6 above a large fixing support 6-7 of the motor housing 6, a plurality of annular ribs 6-2 and longitudinal reinforcing ribs (6-3, 6-4, 6-5) are arranged on the motor housing 6, and the external heat dissipation, the heat dissipation effect of the water pump motor is enhanced, the temperature rise deterioration of the water pump motor is avoided, the working reliability of the water pump motor is improved, a longitudinal groove 6-8 parallel to the axis of the motor shell 6 is arranged on the hole wall of the inner cavity of the motor shell 6, a step 6-9 is arranged in the inner cavity hole of the motor shell 6, an installation lug 6-11 of a sealing ring 7 at the front end of a rotor sleeve is arranged on the inner end surface 6-10 of the motor shell 6, the sealing ring 7 at the front end of the rotor sleeve is sleeved on the sealing ring installation lug 6-11 of the motor shell 6, a bearing seat 6-12 for installing a front bearing 18 of the rotor shaft is arranged at the axis position on the inner end surface 6-10 of the motor shell 6, lugs are arranged around a water through hole 6-1 of the motor shell 6 and are connected with the installation lug 6-11 of the sealing ring 7 at, the strength and the rigidity of the bearing seat 6-12 of the motor shell are improved, the boss 6-13 is arranged on the front end face of the motor shell 6, the first notch 6-14 and the second notch 6-15 are respectively arranged at two opposite positions of the boss 6-13, and the boss 6-13 at the front end of the motor shell 6 extends into the cavity of the water pump shell 1 to inhibit the water flow vortex in the water channel at the outer edge of the water pump impeller 4;

referring to fig. 1 and 7, a pin mounting hole 4-1 is formed in the water pump impeller 4, a pin mounting hole 14-2 is also formed in the rotor shaft 14, an impeller fixing pin 19 is tightly fitted into the water pump impeller pin mounting hole 4-1 and the rotor shaft pin mounting hole 14-2 through a first notch 6-14 and a second notch 6-15 of a front boss 6-13 of the motor housing 6, and the impeller fixing pin 19 transmits a driving torque of the rotor shaft 14 to the water pump impeller 4 to drive the water pump impeller 4 to rotate;

referring to fig. 1 and 9, a motor stator 9 is tightly fitted into an inner cavity mounting hole of a motor housing 6, the front end surface of the stator of the motor 9 abuts against an inner cavity hole step 6-9 of the motor housing 6, a protrusion 9-1 parallel to the longitudinal axis of the motor stator 9 is arranged on the outer surface of the motor stator 9, the same protrusion 9-2 is also arranged on a sheath flange of the motor stator 9, the longitudinal protrusion 9-1 on the outer surface of the motor stator 9 is clamped into a longitudinal groove 6-8 on the inner cavity hole wall of the motor housing 6, a sheath of the motor stator 9 is provided with a mounting lug 9-3 of a coil wiring bracket and a mounting hole 9-4 of the coil wiring bracket is arranged on the lug 9-3, a front end plug 9-5 of the coil wiring bracket is tightly fitted into the mounting hole 9-4 of the coil wiring bracket on the sheath of the motor stator 9, a rear end plug 9-6 of the coil wiring support passes through a through hole on the controller housing 10 backwards and then is inserted into a corresponding connecting hole of the control circuit board 11 and is firmly welded, and a bulge 9-2 on a sheath flange of the motor stator 9 is flush with a longitudinal bulge 9-1 on the outer surface of the motor stator 9;

referring to fig. 1 and 10, an outer edge boss 10-1 having a sealing ring mounting groove is provided on a front end surface of a controller housing 10, the front end outer edge boss 10-1 of the controller housing 10 is inserted into a rear end aperture of a motor housing 6, a motor housing sealing ring 17 is mounted in the sealing ring mounting groove of the front end outer edge boss 10-1 of the controller housing 10, a sealing ring mounting lug 10-2 having a mounting groove for a rotor sleeve rear end sealing ring 16 is provided inside the front end outer edge boss 10-1 of the controller housing 10, the rotor sleeve rear end sealing ring 16 is mounted in the sealing ring mounting groove of the sealing ring mounting lug 10-2 of the controller housing 10, a bearing seat 10-6 of a rotor shaft rear bearing 13 is further provided inside the sealing ring mounting lug 10-2 of the controller housing 10, a notch 10-3 is provided on the bearing seat 10-6 of the controller housing 10, a reinforcing rib 10-4 is arranged between a sealing ring mounting lug 10-2 on a controller housing 10 and a bearing seat 10-6 for connection, the strength and rigidity of the bearing seat 10-6 on the controller housing 10 are improved, a step 10-5 is arranged on an inner spigot of the bearing seat 10-6 of the controller housing 10, a rotor shaft rear bearing 13 is arranged in the inner spigot of the bearing seat 10-6 of the controller housing 10, the rear end surface of the rotor shaft rear bearing 13 is abutted against the step 10-5 of the inner spigot of the bearing seat 10-6 of the controller housing 10, a plurality of protruding reinforcing ribs 10-7 are arranged on the outer end surface of an outer edge boss 10-1 at the front end of the controller housing 10, a fixing screw hole of a power socket 20, a lug 10-8 and a mounting hole 10-9 of the power socket 20 are arranged on the front end surface of the controller housing 10, the power socket 20 is arranged in a power socket mounting hole 10-9 on the controller housing 10 and is fastened by a screw; the control circuit board 11 is installed in the controller housing 10 in a screw fastening mode, the bottom surface of the control circuit board 11 is attached to the rear end surface of the inner cavity of the controller housing 10, and the plurality of protruding reinforcing ribs 10-7 at the front end of the controller housing 10 effectively increase the external heat dissipation area of the controller housing 10 and improve the heat dissipation effect of the control circuit board 11;

Referring to fig. 1, 8 and 9, a controller end cover 12 is tightly fitted into a rear end orifice of a controller housing 10, a plurality of criss-cross reinforcing ribs 12-1 are arranged on an outer surface of the controller end cover 12, and the plurality of criss-cross reinforcing ribs 12-1 on the outer surface of the controller end cover 12 effectively increase an outer surface heat dissipation area of the controller end cover 12, so that a heat dissipation effect of a control circuit board 11 is further improved; the front and rear shaft necks of the rotor shaft 14 are respectively arranged in bearing holes of a rotor shaft rear bearing 13 and a rotor shaft front bearing 18, the shaft center of the rotor shaft 14 is provided with a rotor shaft through hole 14-1 penetrating through the rotor shaft 14, the front end of the rotor shaft 14 is provided with a plurality of radial through holes 14-3, the bottom surface of the guide cone 2 is provided with guide grooves 2-2 with the same number as the radial through holes 14-3 at the front end of the rotor shaft 14, the guide grooves 2-2 on the guide cone 2 are communicated with the radial through holes 14-3 at the front part of the rotor shaft 14 in a one-to-one correspondence manner, the center of the bottom of the guide cone 2 is provided with a counter bore 2-1, the counter bore 2-1 at the bottom of the guide cone 2 is tightly sleeved on the excircle at the front end of the rotor shaft 14 in a matching manner, the bottom surface of the guide cone 2 is abutted against the shaft hole end surface of the water pump impeller 4;

Referring to fig. 1 and 5, a boss is arranged on a rotor shaft 14, a motor rotor 15 is fixed on the rotor shaft 14 in a tight fit manner, the front end surface of the motor rotor 15 is abutted against the boss end surface of the rotor shaft 14, a plurality of cooling water channels 15-1 are arranged inside the motor rotor 15, a rotor sleeve 8 is arranged in an inner cavity of a motor stator 9, a through hole is arranged inside the rotor sleeve 8, the motor rotor 15 is arranged in the through hole inside the rotor sleeve 8, step rabbets 8-1 are arranged at the front end and the rear end of the rotor sleeve 8, the step rabbets of the front end rabbets of the rotor sleeve 8 are tightly sleeved on the outer edge of a sealing ring 7 at the front end of the rotor sleeve, the step rabbets of the rear end rabbets of the rotor sleeve 8 are tightly sleeved on the outer edge of a sealing ring 16 at the rear end of the rotor sleeve, a plurality of protruding reinforcing ribs 8-2 parallel to the longitudinal axis of the rotor sleeve 8 are uniformly, the longitudinal protruding reinforcing ribs 8-2 of the rotor sleeve 8 are respectively inserted into magnetic pole gaps of a stator core of the motor stator 9, and a gap 15-2 is arranged between the excircle of the motor rotor 15 and the inner hole of the rotor sleeve 8.

In this embodiment, the water through hole 6-1 on the front end surface of the motor housing 6, the water cavity between the front end surface of the motor rotor 15 and the inner end surface of the motor housing 6, the cooling water channel 15-1 inside the motor rotor 15, the gap 15-2 between the outer circle of the motor rotor 15 and the inner hole of the rotor sleeve 8, the water cavity between the rear end surface of the motor rotor 15 and the end surface of the mounting lug 10-2 of the sealing ring 16 at the rear end of the rotor sleeve on the controller housing 10, the inner water cavity of the mounting lug 10-2 of the sealing ring 16 at the rear end of the rotor sleeve on the controller housing 10, the notch 10-3 of the bearing seat 10-6 on the controller housing 10, the inner cavity of the bearing seat 10-6 on the controller housing 10, the axial center through hole 14-1 of the rotor shaft 14, the radial through hole 14-3 at the front part of the rotor shaft 14, the diversion groove 2-2 on the bottom surface of the diversion cone 2, and the water 4 and a high-pressure water cavity 1-5 in the water pump shell 1 form a water path for internal forced cooling; because pressure difference is generated between the low-pressure water cavity 1-4 and the high-pressure water cavity 1-5 when the water pump works, water in the high-pressure water cavity 1-5 in the water pump shell 1 enters the water cavity between the front end surface of the motor rotor 15 and the inner end surface of the motor shell 6 from the water through hole 6-1 on the front end surface of the motor shell 6 through the water cavity behind the water pump impeller 4, enters the water cavity between the end surface of the mounting lug 10-2 of the rotor sleeve rear end sealing ring 16 on the controller housing 10 and the inner water cavity of the mounting lug 10-2 of the rotor sleeve rear end sealing ring 16 on the controller housing 10 through the gap 10-3 of the bearing seat 10-6 on the controller housing 10 The inner cavity of the rotor 6 flows to the front end of the rotor shaft 14 along the axle center through hole 14-1 of the rotor shaft 14, then enters the water suction port low-pressure water cavity 1-4 of the water pump impeller 4 from the radial through hole 14-3 at the front part of the rotor shaft 14 through the diversion trench 2-2 on the bottom surface of the diversion cone 2, and is pumped into the high-pressure water cavity 1-5 in the water pump shell 1 by the water pump impeller 4 together with the water inlet from the water pump shell 1-2, so as to realize the circulation flow of the internal cooling water, the rotor sleeve 8 conducts the heat of the motor stator 9 into the internal cooling water, the controller shell 10 conducts the heat of the control circuit board 11 attached to the rear end surface of the inner cavity of the controller shell 10 into the internal cooling water, the circulating water flow of the internal forced cooling takes away the heat of the internal high-temperature structural part, so as, in addition, the natural heat dissipation of the outer surface of the motor shell 6 to the motor stator 9 and the natural heat dissipation of the outer surface of the controller housing 10 and the outer surface of the controller end cover 12 to the control circuit board 11 effectively inhibit the temperature rise of the motor and the controller, avoid the overheating of the motor and the controller, and have higher working reliability.

The above description is a preferred embodiment of the present invention, but the present invention should not be limited to the disclosure of the embodiment and the accompanying drawings, and therefore, all equivalents and modifications that can be accomplished without departing from the spirit of the present invention are within the protection scope of the present invention.

Claims (10)

1. A centrifugal pump, characterized by comprising:

the water inlet is formed in the front end face of the motor shell, the boss is arranged on the front end face of the motor shell, the boss is provided with a notch, and the boss at the front end of the motor shell extends into the cavity of the water pump shell;

The rotor shaft is arranged in the motor shell, a rotor shaft through hole penetrating through the rotor shaft is formed in the axis of the rotor shaft, and a plurality of radial through holes are formed in the front end of the rotor shaft;

The motor rotor is arranged on the rotor shaft, a plurality of cooling water channels are arranged inside the motor rotor, the rotor sleeve is arranged in an inner cavity of the motor stator, a through hole is formed inside the rotor sleeve, the motor rotor is arranged in the through hole inside the rotor sleeve, and a gap is formed between the outer circle of the motor rotor and the inner hole of the rotor sleeve;

the motor stator is arranged in the motor shell and matched with the motor rotor;

The controller housing is fixed at the rear end of the motor shell, a bearing seat for assembling a rotor shaft is arranged in the middle of the front end of the controller housing, a notch is formed in the bearing seat, and the control circuit board is installed in the controller housing;

A water pump housing fixed in front of the motor housing;

the water pump impeller is arranged at the front end of the rotor shaft and positioned in the water pump shell, a corner is arranged at the mixing position of the water inlet flow direction of the water inlet of the water pump shell and the water inlet flow direction of the front end of the water pump impeller, a small platform which enables water flow to be extruded towards the corner is arranged at the corner of the water inlet section of the water pump shell, and an auxiliary water inlet is arranged at the water inlet of the water pump impeller;

The bottom surface of the guide cone is provided with guide grooves with the same number as the radial through holes at the front end of the rotor shaft, and the guide grooves are communicated with the radial through holes at the front part of the rotor shaft in a one-to-one correspondence manner;

install in the water pump casing and be located the water cavity isolation bearing of water pump impeller water inlet department, the water cavity isolation bearing separates into high-pressure water cavity and low pressure water cavity with the water pump casing.

2. the centrifugal pump of claim 1, wherein: the bearing is kept apart to the water cavity around both ends be equipped with sealed lid, the water cavity is kept apart the bearing and is a rolling ball bearing, the bearing inner race tight fit ground of bearing is kept apart to the water cavity is fixed in the water pump casing, water pump impeller's water inlet department is provided with a boss, water cavity behind the water pump impeller and the high-pressure water cavity intercommunication in the water pump casing, the pressure differential between the water cavity behind the water pump impeller and the water pump impeller's water inlet low-pressure chamber makes the water pump impeller to form an axial laminating power to the terminal surface of bearing is kept apart to the water cavity, the water pump impeller's water inlet boss supports and leans on the rear end face of the bearing inner circle.

3. The centrifugal pump of claim 1, wherein: the inner cavity hole of the motor shell is internally provided with a step, the inner end face of the motor shell is provided with a mounting lug of a front-end sealing ring of a rotor sleeve, the front-end sealing ring of the rotor sleeve is sleeved on the mounting lug of the sealing ring of the motor shell, a bearing seat for mounting a front bearing of a rotor shaft is arranged at the axle center on the inner end face of the motor shell, and the mounting lug of the front-end sealing ring of the rotor sleeve and the bearing seat inside the motor shell are arranged around a water passing hole of the motor shell and are connected.

4. The centrifugal pump of claim 1, wherein: be provided with the pin mounting hole on the water pump impeller, also be provided with the pin mounting hole on the rotor shaft, the breach that the impeller fixed pin set up on through motor casing's the front end boss is packed into water pump impeller pin mounting hole and rotor shaft pin mounting hole closely in coordination, thereby the impeller fixed pin drives water pump impeller rotatory on transmitting water pump impeller's drive torque with the rotor shaft.

5. The centrifugal pump of claim 1, wherein: the motor stator is fixed in the inner cavity mounting hole of the motor shell, the front end face of the stator of the motor stator abuts against the inner cavity hole step of the motor shell, a protrusion parallel to the longitudinal axis of the motor stator is arranged on the surface of the motor stator, the same protrusion is also arranged on the sheath flange of the motor stator, and the longitudinal protrusion on the surface of the motor stator is clamped into a longitudinal groove in the inner cavity hole wall of the motor shell.

6. The centrifugal pump of claim 5, wherein: the motor stator is characterized in that a sheath of the motor stator is provided with an installation lug of a coil wiring support, the lug is provided with an installation hole of the coil wiring support, a front end plug of the coil wiring support is inserted into the installation hole of the coil wiring support on the motor stator sheath in a tight fit mode, a rear end plug of the coil wiring support penetrates through a through hole in the controller housing backwards and then is inserted into a corresponding connecting hole of the control circuit board and is welded firmly, and a bulge on a sheath flange of the motor stator is flush with a longitudinal bulge on the outer surface of the motor stator.

7. The centrifugal pump of claim 1, wherein: the sealing ring installing lug is arranged in the sealing ring installing groove of the front end outer edge boss of the controller housing, a sealing ring installing lug is arranged in the inner portion of the front end outer edge boss of the controller housing, and a sealing ring installing lug is arranged in the sealing ring installing lug.

8. the centrifugal pump of claim 7, wherein: the sealing ring mounting lug on the controller housing is connected with the bearing seat through reinforcing ribs, a step is arranged on a spigot inside the bearing seat of the controller housing, a rear bearing of the rotor shaft is mounted in the spigot inside the bearing seat of the controller housing, the rear end face of the rear bearing of the rotor shaft abuts against the spigot step inside the bearing seat of the controller housing, a plurality of protruding reinforcing ribs are arranged on the outer end face of an outer edge boss at the front end of the controller housing, a fixing screw hole of a power socket, the lug and a mounting hole of the power socket are formed in the front end face of the controller housing, the power socket is mounted in a power socket mounting hole in the controller housing and fastened by screws, the control circuit board is mounted in the controller housing in a screw fastening mode, and the bottom face of the control circuit board is attached to the rear end face of an inner cavity.

9. The centrifugal pump of claim 1, wherein: the bottom center of the diversion cone is provided with a counter bore, the counter bore at the bottom of the diversion cone is sleeved on the excircle at the front end of the rotor shaft in a tight fit manner, the bottom surface of the diversion cone is abutted against the end surface of the shaft hole of the water pump impeller, and the diversion grooves on the bottom surface of the diversion cone face the water suction ports of the impeller blades of the water pump impeller in a one-to-one correspondence manner.

10. The centrifugal pump of claim 1, wherein: the orifice of the front end and the orifice of the rear end of the rotor sleeve are provided with step rabbets, the step rabbets of the orifice of the front end of the rotor sleeve are tightly sleeved on the outer edge of a sealing ring at the front end of the rotor sleeve, the step rabbets of the orifice of the rear end of the rotor sleeve are tightly sleeved on the outer edge of the sealing ring at the rear end of the rotor sleeve, a plurality of protruding reinforcing ribs parallel to the longitudinal axis of the rotor sleeve are uniformly distributed on the surface of the outer circle of the rotor sleeve, the longitudinal protruding reinforcing ribs of the rotor sleeve are respectively inserted into magnetic pole gaps of a stator core of a motor stator, and a gap is formed between the outer circle of the motor rotor and.