CN113790162A

CN113790162A - Cooling water pump of new energy automobile

Info

Publication number: CN113790162A
Application number: CN202111343584.9A
Authority: CN
Inventors: 曾纯洁
Original assignee: Hangzhou Chonghong Technology Co ltd
Current assignee: Hangzhou Chonghong Technology Co ltd
Priority date: 2021-11-13
Filing date: 2021-11-13
Publication date: 2021-12-14

Abstract

The invention discloses a cooling water pump of a new energy automobile, which comprises a water pump body, wherein an impeller body for driving cooling water to rotate is arranged in the water pump body, a fixing sleeve is arranged on the water pump body, a first rotating shaft is arranged on the fixing sleeve, a second rotating shaft for driving the impeller body to rotate is arranged in the fixing sleeve, a first sleeve body for sliding connection with the first rotating shaft is arranged on the first rotating shaft, a speed change assembly for changing the rotating speed of the second rotating shaft through the first rotating shaft is arranged in the fixing sleeve, and a magnetic suspension assembly for changing the longitudinal height of the first sleeve body is arranged in the fixing sleeve, the position of the first sleeve body and a fixed column is adjusted through the matching of the magnetic suspension assembly and the speed change assembly, the temperature of cooling water is detected according to a temperature sensor, so that a signal is sent to a Hall sensor for three-stage switching, the impeller body is driven to carry out stepless speed change through the first speed change gear and the second speed change gear.

Description

Cooling water pump of new energy automobile

Technical Field

The invention relates to the technical field of new energy automobiles, in particular to a cooling water pump of a new energy automobile.

Background

The new energy automobile adopts unconventional automobile fuel as a power source (or adopts conventional automobile fuel and a novel vehicle-mounted power device), integrates advanced technologies in the aspects of power control and driving of the automobile, forms an automobile with advanced technical principle, new technology and new structure, and can be divided into broad and narrow new energy automobiles according to the range. The new energy automobile is also called as an alternative fuel automobile, and comprises a pure electric automobile, a fuel cell electric automobile and other automobiles which all use non-petroleum fuel, and also comprises a hybrid electric automobile, an ethanol gasoline automobile and other automobiles which partially use non-petroleum fuel. All new energy automobiles existing at present are included in the concept, and are specifically divided into six categories: hybrid electric vehicles, pure electric vehicles, fuel cell vehicles, alcohol ether fuel vehicles, natural gas vehicles, and the like.

In the cylinder body of the automobile engine, a plurality of water channels for cooling water circulation are connected with a radiator (commonly called a water tank) arranged at the front part of the automobile through water pipes to form a large water circulation system, and a water pump is arranged at the upper water outlet of the engine and is driven by a fan belt to pump hot water out of the water channels of the engine cylinder body and pump cold water in the water channels. A thermostat is arranged beside a water pump, when an automobile is started (cold automobile), the thermostat is not opened, so that cooling water does not pass through a water tank, the cooling water is only circulated in an engine (commonly called small circulation), the thermostat is opened when the temperature of the engine reaches over 95 ℃, hot water in the engine is pumped into the water tank, cold air in the forward running of the automobile blows through the water tank to take away heat, the working principle of the thermostat is that the engine drives a water pump bearing and an impeller to rotate through a belt pulley, cooling liquid in the water pump is driven by the impeller to rotate together, and is thrown to the edge of a water pump shell under the action of centrifugal force to generate certain pressure at the same time, and then the cooling liquid flows out of a water outlet channel or a water pipe. The pressure of the center of the impeller is reduced because the cooling liquid is thrown out, and the cooling liquid in the water tank is sucked into the impeller through the water pipe under the action of the pressure difference between the inlet of the water pump and the center of the impeller, so that the reciprocating circulation of the cooling liquid is realized;

driven automobile cooling water pump mostly adopts mechanical drive, the fixed structure of drive ratio, and wherein the fixed structure of drive ratio means that cooling water pump can't carry out corresponding change according to the height of temperature, the volume of pump water to the phenomenon that the engine overcooling often appears, easily causes harm to the engine. Therefore, the cooling water pump of the new energy automobile is provided.

Disclosure of Invention

The invention aims to provide a cooling water pump of a new energy automobile, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a cooling water pump of a new energy automobile comprises a water pump body, wherein an impeller body used for driving cooling water to rotate is arranged inside the water pump body, a fixing sleeve is arranged on the water pump body, a first rotating shaft is arranged on the fixing sleeve, and a second rotating shaft used for driving the impeller body to rotate is arranged inside the fixing sleeve;

the bearing body used for being matched with the first rotating shaft is arranged inside the fixed sleeve, the first sleeve body is provided with a fixed column, a disc used for enabling the first sleeve body to be longitudinally adjusted in height through a magnetic suspension assembly is arranged on the fixed column, the water pump body is provided with a temperature sensor used for sensing the temperature of cooling water, a second sleeve body used for being rotatably connected with the second rotating shaft is arranged inside the fixed sleeve, the temperature of the cooling water is detected through the temperature sensor, the sleeve body drives the fixed column to adjust the position through the magnetic suspension assembly, and therefore the second rotating shaft and the impeller are subjected to stepless speed change under the action of the speed change assembly.

Preferably, the speed change assembly comprises a gear body arranged in a fixed sleeve, a plurality of supporting seats for fixing the gear body are arranged in the fixed sleeve, a plurality of synchronous gears are arranged on the fixed column and the second rotating shaft, the synchronous gears on the fixed column are meshed with the synchronous gears on the second rotating shaft through the gear body to enable the second rotating shaft to rotate, a first speed change gear is arranged on the fixed column in parallel, and a second speed change gear which is meshed with the first speed change gear is arranged on the second rotating shaft in parallel, so that the fixed column enables the second rotating shaft to perform stepless speed change through the magnetic suspension assembly.

Preferably, the fixed sleeve is symmetrically provided with oil inlet pipelines for adding lubricating oil, the oil inlet pipelines are provided with valves, and the fixed sleeve is internally provided with a baffle plate for preventing lubricating grease from influencing the magnetic suspension assembly so as to lubricate the gear body, the synchronous gear, the first speed change gear and the second speed change gear through the lubricating grease.

Preferably, the magnetic suspension subassembly is including setting up in the inside panel of fixed sleeve, just the surrounding magnet that is provided with on the panel is first, be provided with on the disc and be used for rotating the float of being connected rather than, just be provided with on the float one and be used for producing the magnet two of repulsion with magnet one, wherein be provided with a plurality of electro-magnets on the panel, and be provided with a plurality of hall sensor that are used for detecting the float position on the panel, so that the float carries out position control through hall sensor drive sleeve body one.

Preferably, a cavity is formed in the second rotating shaft, a coil body is arranged in the cavity, a cylinder body is arranged in the cavity, a rotating column which is used for being rotatably connected with the cylinder body is arranged on the coil body, positive and negative magnetism is arranged on the inner walls of two sides of the cavity body, a slip ring is arranged on the second sleeve body, an electric power assembly used for transmitting current is arranged on the slip ring, and the second rotating shaft rotates to enable the coil in the cavity to cut the magnetic induction lines to generate current to the electric power assembly.

Preferably, the electric power assembly comprises an A-phase output line and a B-phase output line which are symmetrically arranged on the slip ring, a rechargeable battery is arranged on the second sleeve body, the A-phase output line and the B-phase output line are symmetrically connected to the end portion of the rechargeable battery, electric wire bodies are symmetrically arranged on the rechargeable battery, a storage battery is arranged inside the fixed sleeve, and the electric wire bodies are connected to the panel through the storage battery.

Preferably, the water pump body includes a housing and a vortex cover, wherein the fixing sleeve is disposed on the housing, the vortex cover is provided with a water inlet pipe, and a water outlet for outputting cooling water is disposed inside the vortex cover.

Preferably, the number of teeth and the radius of the first speed change gear and the second speed change gear are different, so that the first speed change gear and the second speed change gear can be adjusted at different speeds when meshed through a synchronous gear.

Compared with the prior art, the invention has the beneficial effects that:

1. the magnetic suspension assembly and the speed change assembly are matched to adjust the position of the sleeve body I and the fixed column so as to drive the rotating shaft II and the impeller body to carry out stepless speed change, the temperature of cooling water is detected according to the temperature sensor, when the temperature is higher than a standard value, a signal is sent to the Hall sensor to carry out three-stage switching, so that the positions of the sleeve body I and the fixed column are controlled through current generated by the power assembly, the speed change gear I and the speed change gear II are switched and meshed, the rotating shaft is switched from normal speed to low speed or high speed operation, and the purpose of changing the rotating speed of the impeller body according to the temperature of the cooling water is achieved.

2. The invention is provided with the oil inlet pipeline, and the closing of the oil inlet pipeline is controlled by the valve, so that lubricating grease is periodically supplemented to lubricate the gear body, the synchronous gear, the first speed change gear and the second speed change gear.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a schematic structural view of the shifting unit of the present invention;

FIG. 4 is a schematic view of the housing structure of the present invention;

FIG. 5 is a schematic view of the internal structure of the fixing sleeve according to the present invention;

FIG. 6 is a schematic view of a second embodiment of the present invention;

FIG. 7 is a schematic view of a power assembly according to the present invention;

FIG. 8 is a schematic structural diagram of a magnetic levitation assembly of the present invention;

fig. 9 is a schematic diagram of a disassembled structure of the magnetic suspension assembly of the present invention.

In the figure: 1-a water pump body; 2-the impeller body; 3-fixing the sleeve; 4, rotating a first shaft; 5, rotating a second shaft; 6-a first sleeve body; 7-a transmission assembly; 8-a magnetic suspension assembly; 9-a bearing body; 10-fixing columns; 11-a housing; 12-a scroll cover; 13-a water inlet pipe; 14-a water outlet; 31-an oil inlet pipe; 32-a valve; 33-a baffle; 51-a cavity; 52-a coil body; 53-cylindrical body; 54-rotating column; 55-a slip ring; 56-electrical components; 71-a gear body; 72-a support base; 73-synchronizing gear; 74-speed change gear one; 75-change gear two; 81-panel; 82, a magnet I; 83-a float; 84-magnet two; 85-an electromagnet; 86-hall sensor; 101-a disc; 102-a temperature sensor; 103-a second sleeve body; 561-A phase output lines; 562-B phase output lines; 563-rechargeable Battery; 564-a wire body; 565-accumulator.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-9, the present invention provides a technical solution: the scheme solves the problems that the existing cooling water pump for the transmission automobile is mainly of a structure with mechanical driving and fixed transmission ratio, wherein the fixed transmission ratio structure means that the cooling water pump can not change the amount of pumped water according to the water temperature, so that the engine is cooled excessively and is easy to damage the engine;

according to fig. 1 and 2:

the water pump comprises a water pump body 1, an impeller body 2, a fixed sleeve 3, a first rotating shaft 4, a shell 11, a vortex cover 12, a water inlet pipeline 13, a water outlet 14 and a temperature sensor 102, wherein the water pump body 1 comprises the shell 11 and the vortex cover 12, the impeller body 2 is arranged between the shell 11 and the vortex cover 12, the water inlet pipeline 13 is fixedly arranged at the bottom of the vortex cover 12, cooling liquid is contacted with the impeller body 2 through the water inlet pipeline 13 and is driven to rotate by the impeller body 2, the water outlet 14 is arranged in the vortex cover 12, the cooling liquid is thrown to the edge of the shell 11 under the action of centrifugal force after the impeller body 2 rotates, meanwhile, certain pressure is generated, and then the cooling liquid flows out from the water outlet 14, the fixed sleeve 3 is fixedly arranged on the shell 11, the first rotating shaft 4 is in rotating connection with the fixed sleeve 3, a part of the first rotating shaft 4 is arranged in the fixed sleeve 3, and one external end of the first rotating shaft is synchronously rotated with a motor through a belt pulley, the temperature sensor 102 is fixedly installed inside the scroll cover 12, and detects the temperature of the cooling water through the temperature sensor 102, and detects whether the temperature of the cooling water is increased to 82-91 ℃, wherein the temperature sensor 102 is a sensor capable of sensing the temperature and converting the temperature into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument and has a plurality of varieties. The measurement method can be divided into a contact type and a non-contact type, and the measurement method can be divided into a thermal resistor and a thermocouple according to the characteristics of sensor materials and electronic elements.

According to fig. 3-6:

comprises a first rotating shaft 4, a second rotating shaft 5, a first sleeve body 6, a speed change component 7, a bearing body 9, a fixed column 10, a shell 11, an oil inlet pipeline 31, a first valve 32, a baffle 33, a cavity 51, a coil body 52, a cylinder body 53, a gear body 71, a support seat 72, a synchronizing gear 73, a first speed change gear 74, a second speed change gear 75, a floater 83, a disc 101 and a second sleeve body 103, wherein the second sleeve body 103 is fixedly arranged at the top of the fixed sleeve 3, the fixed sleeve 3 is formed by combining two circular sleeves, the bearing body 9 is fixedly arranged at the top of one circular sleeve, the second sleeve body 103 is fixedly arranged at the top of the other circular sleeve, the first rotating shaft 4 penetrates through the inside of the bearing body 9, the first sleeve body 6 is arranged at one end of the first rotating shaft 4 and is in sliding connection with the first rotating shaft 4, the second rotating shaft 5 is in rotating connection with the second sleeve body 103, the impeller body 2 is fixedly arranged at one end of the rotating shaft II 5, the fixing column 10 is fixedly arranged at the bottom of the sleeve body I6, so that the rotating shaft I4 drives the fixing column 10 to synchronously rotate through the sleeve body I6, the disc 101 is arranged at one end of the bottom of the fixing column 10 and is in rotating connection with the magnetic suspension assembly 8, and the disc 101 drives the fixing column 10 and the sleeve body I6 to adjust the position through the magnetic suspension assembly 8;

the speed change assembly 7 in the present scheme includes a gear body 71, three support seats 72, a synchronizing gear 73, a first speed change gear 74 and a second speed change gear 75, the three support seats 72 are installed inside the fixing sleeve 3 and are fixedly connected with the inner wall of the fixing sleeve 3, wherein the gear body 71 is fixed by the support seats 72 and is rotatably connected with the same, the synchronizing gear 73 is installed on the fixing column 10 and the second rotating shaft 5, the synchronizing gear 73 on the fixing column 10 and the synchronizing gear 73 on the second rotating shaft 5 in an initial state are engaged with each other through the gear body 71 in an intermediate position, the first rotating shaft 4 drives the second rotating shaft 5 to rotate at a normal speed under the action of the first sleeve body 6 and the fixing column 10, and the first speed change gear 74 is installed on the fixing column 10 and the first sleeve body 6 respectively and is symmetrically installed by taking the synchronizing gear 73 as a symmetric point, the number of teeth and the radius of the first speed change gear 74 installed on the first sleeve body 6 are both greater than those of the first speed change gear 74 on the fixed column 10, the first speed change gear 74 and the gear body 71 are meshed step by step in the initial state, the second speed change gear 75 is symmetrically installed on the second rotating shaft 5 by the synchronizing gear 73, the number of teeth and the radius of the second speed change gear 75 above the synchronizing gear 73 are both less than those of the second speed change gear 75 below the synchronizing gear 73, and further, when the fixed column 10 and the first sleeve body 6 perform the ascending motion through the magnetic suspension assembly 8, the first speed change gear 74 on the first sleeve body 6 is meshed with the second speed change gear 75 through the synchronizing gear 73, because the number of teeth and the radius of the first speed change gear 74 of the first sleeve body 6 is greater than those of the second speed change gear 75 on the second rotating shaft 5, at this time, when the fixed column 10 and the first sleeve body 6 perform the descending motion under the same condition, the magnetic suspension assembly 8 drives the fixed column 10 and the first sleeve body 6, the second rotating shaft 5 rotates at a reduced speed at the moment, so that the aim of carrying out stepless speed change switching on the impeller body 2 is fulfilled;

in order to lubricate the first speed change gear 74, the second speed change gear 75, the synchronous gear 73 and the gear body 71, the scheme adds lubricating grease into the fixed sleeve 3 through the oil inlet pipeline 31, controls the opening and closing state of the fixed sleeve through the valve 32, and simultaneously obstructs the magnetic suspension assembly 8 through the baffle plate 33 to prevent the lubricating grease from falling to the magnetic suspension assembly 8 to cause unnecessary damage to the magnetic suspension assembly 8, wherein the baffle plate 33 is fixedly arranged on the inner wall of the fixed sleeve 3 close to the bottom, the oil inlet pipeline 31 and the valve 32 are symmetrically arranged on the fixed sleeve 3, the disc 101 is fixedly arranged on the bottom of the fixed column 10, the disc 101 is rotatably connected with the floater 83, the cavity 51 is arranged on the rotating shaft second 5 close to the top of the fixed sleeve 3, the coil body 52 is rotatably connected with the cylinder body 53 fixedly arranged on the rotating shaft second 5 through the rotating column 54, and the inner walls of two sides of the cavity 51 are composed of positive and negative magnetic fields, when the second rotating shaft 5 rotates, the coil body 52 is not moved, and the internal magnetic field is cut to generate current;

according to fig. 7-9:

the magnetic suspension assembly 8 comprises a magnetic suspension assembly 8, a coil body 52, a rotating column 54, a sliding ring 55, an electric power assembly 56, a panel 81, a first magnet 82, a floater 83, a second magnet 84, an electromagnet 85, a Hall sensor 86, an A-phase output line 561, a B-phase output line 562, a rechargeable battery 563, an electric wire body 564 and a storage battery 565, wherein the magnetic suspension assembly 8 in the scheme comprises the panel 81, the first magnet 82, the floater 83, the second magnet 84, the electromagnet 85 and the Hall sensor 86, and the electric power assembly 56 comprises the A-phase output line 561, the B-phase output line 562, the rechargeable battery 563, the electric wire body 564 and the storage battery 565;

the rotating column 54 is fixedly mounted on the coil body 52 and rotatably connected with the cylinder body 53, the panel 81 is fixedly connected with the bottom of the fixed sleeve 3, the first magnet 82 is fixedly mounted on the panel 81 and surrounds the panel 81, the electromagnets 85 are fixedly mounted on the panel 81 and four are mounted on the panel 81, the floats 83 and the second magnets 84 float below the baffle 33, repulsive force exists between the second magnets 84 and the first magnets 82, and the electromagnets 85 ensure that the magnets do not shake, wherein three hall sensors 86 are fixedly mounted on the panel 81 and respectively correspond to three modes of low speed, normal speed and high speed of the impeller body 2, the hall effect sensors are also called hall sensors 86 and are transducers, and the hall effect sensors convert a changing magnetic field into changes of output voltage. The hall sensor 86 is used above all for measuring magnetic fields, but also for measuring physical quantities which generate and influence magnetic fields, for example for proximity switches, hall sensors, position measuring devices, rotational speed measuring devices and current measuring devices. In its simplest form, the sensor acts as an analog transducer, returning a voltage directly. Its distance from the hall disk can be set at a known magnetic field. Using multiple sets of sensors, the relative position of the magnets can be inferred. The current passing through the conductor can generate a magnetic field which changes along with the current, and the Hall effect sensor can measure the current under the condition of not interfering the current, the typical structure is that the Hall effect sensor and a winding magnetic core or a permanent magnet beside the measured conductor are combined into a whole, it needs to be explained that the magnetic suspension assembly 8 used in the scheme has the advantages of small volume and accuracy in small stroke, and the phenomenon that other pushing mechanisms have unreasonable phenomena and insufficient precision is solved because the volume of the water pump body 1 is small, so that the magnetic suspension assembly 8 can be better suitable for the scheme relatively, and the magnetic suspension shaking degree in the scheme is within the tooth pitch control range of the gear assembly, thereby avoiding the phenomena of tooth collision and the like;

because the coil body 52 is rotatably connected with the second rotating shaft 5 through the rotating column 54, one end of the coil body 52 is inside the slip ring 55, the slip ring 55 is fixedly installed inside the second sleeve body 103, the a-phase output line and the B-phase output line 562 are symmetrically installed on the surface of the slip ring 55, and one end of the coil body is respectively connected with two ends of the rechargeable battery 563, and the rechargeable battery 563 is fixedly installed inside the fixed sleeve 3, wherein the storage battery 565 is also fixedly installed inside the fixed sleeve 3 and connected through the wire body 564, two ends of the wire body 564 are respectively connected to the panel 81, the current magnitude of the rechargeable battery 563 is controlled through the control system, and when the temperature sensor 102 detects that the temperature of the cooling water reaches 93-103 ℃ or above 103 ℃, the control system increases the current output, the temperature sensor 102 sends a signal to the hall sensor 86, make hall sensor 86 switch, close first and second hall sensor 86, start third hall sensor 86 and make pivot two 5 drive impeller body 2 and carry out high-speed rotation, and on the same way, when the temperature was less than 91 ℃, close first and third hall sensor 86, start first hall sensor 86 and carry out low-speed rotation, and second hall sensor 86 is corresponding to normal operating speed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A cooling water pump of a new energy automobile comprises:

a water pump body (1), an impeller body (2) is arranged in the water pump body (1),

the water pump comprises a fixed sleeve (3), the fixed sleeve (3) is arranged on a water pump body (1), a first rotating shaft (4) is arranged on the fixed sleeve (3), a second rotating shaft (5) is arranged in the fixed sleeve (3), a first sleeve body (6) in sliding connection with the first rotating shaft (4) is arranged on the first rotating shaft (4), a speed change assembly (7) for changing the rotating speed of the second rotating shaft (5) through the first rotating shaft (4) is arranged in the fixed sleeve (3), and a magnetic suspension assembly (8) for changing the longitudinal height of the first sleeve body (6) is arranged in the fixed sleeve (3),

the method is characterized in that: a bearing body (9) used for being matched with the rotating shaft I (4) is arranged in the fixed sleeve (3), a fixed column (10) is arranged on the sleeve body I (6), a disc (101) used for enabling the sleeve body I (6) to be longitudinally adjusted in height through a magnetic suspension assembly (8) is arranged on the fixed column (10), a temperature sensor (102) used for sensing the temperature of cooling water is arranged on the water pump body (1), and a sleeve body II (103) used for being rotatably connected with the rotating shaft II (5) is arranged in the fixed sleeve (3);

magnetic suspension subassembly (8) including setting up in panel (81) of fixed sleeve (3) inside, just it is provided with magnet (82) to encircle on panel (81), be provided with on disc (101) and be used for rather than rotating float (83) of being connected, just float (83) are provided with on one and are used for producing magnet two (84) of repulsion with magnet (82), wherein be provided with a plurality of electro-magnets (85) on panel (81), and be provided with a plurality of hall sensor (86) that are used for detecting float (83) position on panel (81), so that float (83) carry out position control through hall sensor (86) drive sleeve body (6).

2. The cooling water pump of the new energy automobile according to claim 1, characterized in that: the speed change component (7) comprises a gear body (71) arranged in the fixed sleeve (3), a supporting seat (72) for fixing the gear body (71) is arranged in the fixed sleeve (3), wherein a plurality of supporting seats (72) and gear bodies (71) are arranged in the fixed sleeve (3), a synchronous gear (73) is arranged on the fixed column (10) and the second rotating shaft (5), and the synchronous gear (73) on the fixed column (10) is meshed with the synchronous gear (73) on the second rotating shaft (5) through the gear body (71) to enable the second rotating shaft (5) to rotate, a first speed change gear (74) is arranged on the fixed column (10) in parallel, a second speed change gear (75) which is used for being meshed with the first speed change gear (74) is arranged on the second rotating shaft (5) in parallel, so that the fixed column (10) enables the second rotating shaft (5) to carry out stepless speed change through the magnetic suspension assembly (8).

3. The cooling water pump of the new energy automobile according to claim 1, characterized in that: oil inlet pipelines (31) used for adding lubricating oil are symmetrically arranged on the fixed sleeve (3), a first valve (32) is arranged on the oil inlet pipelines (31), and a baffle (33) used for preventing lubricating grease from influencing the magnetic suspension assembly (8) is arranged inside the fixed sleeve (3).

4. The cooling water pump of the new energy automobile according to claim 1, characterized in that: the rotating shaft II (5) is provided with a cavity (51), a coil body (52) is arranged in the cavity (51), a cylinder body (53) is arranged in the cavity (51), a rotating column (54) which is used for being in rotating connection with the cylinder body (53) is arranged on the coil body (52), the inner walls of two sides of the cavity (51) body are provided with positive and negative magnetism, a sliding ring (55) is arranged on the sleeve body II (103), and a power assembly (56) used for transmitting current is arranged on the sliding ring (55).

5. The cooling water pump of the new energy automobile according to claim 4, characterized in that: the power assembly (56) comprises an A-phase output line (561) and a B-phase output line (562) which are symmetrically arranged on a sliding ring (55), a rechargeable battery (563) is arranged on the second sleeve body (103), the A-phase output line (561) and the B-phase output line (562) are symmetrically connected to the end of the rechargeable battery (563), a wire body (564) is symmetrically arranged on the rechargeable battery (563), a storage battery (565) is arranged inside the fixed sleeve (3), and the wire body (564) is connected to the panel (81) through the storage battery (565).

6. The cooling water pump of the new energy automobile according to claim 1, characterized in that: the water pump body (1) comprises a shell (11) and a vortex cover (12), wherein the fixed sleeve (3) is arranged on the shell (11), a water inlet pipeline (13) is arranged on the vortex cover (12), and a water outlet (14) for outputting cooling water is formed in the vortex cover (12).

7. The cooling water pump of the new energy automobile according to claim 2, characterized in that: the number of teeth and the radius of the first speed change gear (74) are different from those of the second speed change gear (75), so that the first speed change gear (74) and the second speed change gear (75) can be adjusted at different speeds when meshed through the synchronous gear (73).