KR101296390B1 - Water pump for automobile having a outer type rotator with a permanent magnet - Google Patents

Abstract

The present invention simplifies the configuration of the automotive water pump for cooling water circulation and prevents the rotor and the impeller from being de-synchronized, thereby integrating the impeller and the rotor to maximize the driving efficiency of the water pump, thereby providing excellent magnetic properties for the stator. The present invention relates to a water pump for an automobile having an external rotor with a permanent magnet inserted therein so that the rotor and the impeller are synchronously rotated to stably circulate the coolant while minimizing the influence of vibration.
In the water pump A for automobiles, the shaft is installed on the motor cover 1 with the shaft 31 upright in the center of the upper surface, and the stator is installed in the inner center by the stop pin 21. A motor case (3) having a space (32) in which an upper surface thereof is opened to the outside of the circumference; Consists of the rotor body 51 and the impeller body 52, the insertion groove (51a) is formed in the cylindrical circumference of the rotor body 51, the permanent magnet is inserted into the cover 56 after fusion and closing On the impeller body 52, the vane 54 having the lid 55 is integrally fused and installed, and the impeller body 52 is fitted to the shaft 31 via the bush 7 to be assembled. A rotor (5) inserted into the stator (2) outer space (32) of the motor case (3) to rotate the cylindrical body of the rotor body (51); It consists of a PCB board 11 for controlling the motor operation.
Therefore, the impeller and the rotor constituting the water pump can be maintained in a stable installation form in which the rotor surrounds the stator in an integrated state without being connected by a separate connecting shaft or a fixed shaft. It is possible to improve the durability and reliability of the water pump by preventing a decrease in flow efficiency.

Description

Water pump for automobile having a outer type rotator with a permanent magnet}

The present invention relates to a water pump for automobiles having an external rotor with permanent magnets inserted therein. More particularly, the rotor constituting the water pump for automobiles includes a cylindrical rotor body made of engineering plastics, and the rotor body. Consists of the impeller body portion is formed by attaching a plurality of vanes on the upper surface, inserting a neodymium (Nd) -based magnet, or a permanent magnet made of ferrite sintered magnet by forming an insertion groove in the cylindrical circumference of the rotor body As a result, the impeller is rotated corresponding to the stator installed inside the motor case so that the impeller is synchronized with the rotor without the configuration of a separate drive shaft or a connecting shaft.

In this way, the rotor, the impeller and the rotor are integrated to drive synchronously, both of them are driven in a state of minimizing the influence of vibration with excellent magnetic properties, so that the rotor can not only maintain a stable installation state for the stator In addition, it prevents the deterioration of the flow efficiency due to the flow rate loss during the operation of the water pump, thereby preventing the overall performance degradation of the vehicle and at the same time improving the durability and reliability of the water pump.

In general, an electric water pump is installed in a vehicle to stably circulate cooling water in an engine and a heater for engine cooling and indoor heating of a vehicle.

These water pumps allow the rotor to be rotated by a magnetic field generated from the stator while the upper impeller is connected to the rotor which becomes a permanent magnet so that the impeller connected to the rotor can circulate the coolant while rotating. Was.

Such a conventional water pump, as shown in the cross-sectional view of the configuration of the 'electric water pump' of the Republic of Korea Patent Application Publication No. 10-2011-0055277 in Figure 1, it is a stator (102, 104) ( The impeller 22 is installed at the tip of the shaft 83 installed in the center of the rotors 84, 86, 88, and 90 rotated by 108, 109, so that the rotor corresponds to the magnetic field generated from the stator. The impeller 22 attached to the tip of the rotor is rotated while reacting so that the desired cooling water is circulated while the impeller 22 is rotated. In order to prevent the permanent magnet of the rotor from being exposed to the coolant for a long time, it is possible to prevent the permanent magnet from being exposed to the coolant by using a secondary case covering the outer circumference of the permanent magnet. It is.

However, the secondary case described above requires melt molding of a low mold material containing potassium-based compound (BMC) at a high temperature to be injection molded at a high temperature with a rotor assembly including a permanent magnet. Due to the magnetic characteristics, the performance may be deteriorated. The rotor having the deteriorated magnetic characteristics not only causes a loss of rotational force of the motor, but also may cause a decrease in performance of the water pump.

In addition, as shown in FIG. 2, in the case of Korean Patent Application No. 10-2008-0131459, a rotating shaft 011 is connected to a distal end of a rotating motor 013 installed inside the housing 010, and this rotating shaft is 011. The impeller 012 is installed along with the seal 016 at the distal end so that the rotational force of the rotary motor 013 is transmitted to the impeller 012 so that the impeller 012 is rotated to allow the circulation of the coolant. It is a structure in which the seal 016 is installed on the rotating shaft (011) of the rotary motor (013) and the seal (016) slides and rotates on the rotating shaft (011). The discharge hole (drain hole) was formed to prevent the coolant from flowing into the housing 010 due to the bearing damage caused by the inflow of the coolant due to the deterioration of the wear resistance, but this is a structure in which the motor part and the pump part are separated and waterproof. Because it is not electricity Was that a problem such as being unable to prevent the damage from occurring.

In addition, an electric pump of US Pat. No. 7896626 has been proposed, which is configured to separate the water pump into a main case and a pump case so as to be waterproofed by each partition wall, and to form a motor and a flow resistance integrally configuring the sensor and the stator. It is a structure which improves the performance of the rotor integrated impeller case and sealing and a pump which comprise a flow path and a hole to reduce, and becomes a structure which fixes a pump case and a shaft.

In the same way as the configuration of the 'Electric Water Pump' of the Republic of Korea Patent Publication No. 10-2011-0055277, the outer peripheral surface of the permanent magnet by injection molding the rotor assembly including a yoke (Yoke) for fixing the permanent magnet and permanent magnet at high temperature By constructing the secondary case surrounding the structure, since the structure to block the exposure of the cooling water of the permanent magnet, the magnetic properties of the permanent magnets vulnerable to high temperatures can be degraded, the rotor with the reduced magnetic properties is the rotational force of the motor In addition to causing a loss, there was a problem such as causing a decrease in the water pump performance.

In the case of the pump of European Patent Publication No. 2004-EP1 635064 A1, in connecting the pumping apparatus and the motor, in this case, the motor must be connected through the partition wall of the pumping chamber and the motor controller is installed on the side. Because of the structure, the structure of the pump is complicated and at the same time, the operation performance of the pump is reduced.

In addition, Korean Patent Application No. 10-2004-0073241 "Method of manufacturing a vehicle water pump impeller assembly" is a cover having a plurality of grooves corresponding to the vanes with a plurality of vanes having a specific angle of inclination on the upper surface of the disc. By covering the ultrasonic fusion to be able to produce the desired impeller assembly, which is simply configured to cover the construction of the impeller into a cover and vanes, so as to be integral with the ultrasonic fusion by each other.

Republic of Korea Patent Publication No. 10-2011-0055277 Republic of Korea Patent Application No. 10-2008-0131459 U.S. Patent No. 7896626 European Patent Publication No. 2004-EP1 635064 A1 Republic of Korea Patent Application No. 10-2004-0073241

Therefore, an object of the present invention is to configure the rotor integrally with the rotor body and the impeller body in order to solve all the problems of the conventional water pump for automobiles installed and used for circulation of the cooling water of the automobile as described above, the motor The cylindrical circumference of the rotor body is rotatably installed at the periphery of the motor case installed on the cover, and a permanent magnet made of a neodymium-based magnet or a ferrite sintered magnet is installed inside the cylindrical circumference of the rotor body. A plurality of vanes having a cover are fused and installed in the impeller body.

The permanent magnet in the cylindrical circumference strongly reacts to the magnetic field from the stator so that the rotor is rotated, and the impeller body portion integrally formed on the upper surface of the rotor body allows the coolant to be circulated by a plurality of vanes. Impellers and rotors, which are the core components of the water pump, can be installed and used as a single component, simplifying the components of the water pump and improving the coercive force corresponding to the flow resistance of the coolant. It is possible to improve the motor's excellent torque performance and durability by eliminating the possibility of stator unsynchronization. Therefore, it is possible to minimize the flow loss of the water pump for automobiles, thereby improving the performance of the water pump. In providing a water pump.

In order to achieve the above object, an automobile water pump having an external rotor with a permanent magnet inserted therein according to the present invention is installed on a motor cover with an upright shaft installed in the center of an upper surface of an automobile water pump. A motor case in which a stator is installed at the inner center by a stop pin, and a space part is formed in which an upper surface is opened to the outside of the circumference; Consists of the rotor body and the impeller body, the insertion groove is formed in the cylindrical circumference of the rotor body, the permanent magnet is inserted and fused and closed by the covering, and the vane with the cover is fused and installed integrally on the impeller body. The impeller body is assembled by being fitted to the shaft through a bush, the rotor circumferential cylindrical portion of the rotor body is inserted into the stator outer space of the motor case to rotate the rotor; Characterized in that consists of.

According to the automobile water pump having an external rotor with a permanent magnet of the present invention, the impeller, which is a core component of the water pump, and the rotor for rotating and driving the impeller are not separate components, but the impeller body and the rotor. It is composed of one part by integrating into the main body, but inserts a neodymium permanent magnet into the insertion groove in the cylindrical circumference of the rotor main body so that the rotor rotates with a strong rotational force in response to the stator. It is possible to eliminate the fear that the synchronization between the rotors will be broken.

 Therefore, it is easy to maintain magnetic characteristics, and since the impeller body is formed in a truncated conical shape, it is possible to smoothly flow the cooling water and improve the performance of the water pump with little power consumption. It is also possible to minimize the effects of vibration without installing a vibration-proof bracket against vibration, thereby improving the driving performance of the water pump, thereby improving the driving performance of the vehicle. .

1 is a cross-sectional view of a conventional water pump.
2 is a cross-sectional view of another example of a conventional water pump.
3 is a perspective view of a water pump according to the present invention.
Figure 4 is an exploded perspective view of the water pump according to the present invention.
5 is an assembled sectional view of the water pump according to the present invention.
6 is a perspective view of a rotor that is a constituent part of the water pump according to the present invention.
Figure 7 is an exploded perspective view of a rotor which is a constituent part of the water pump according to the present invention.
8 is a cross-sectional view of the rotor body which is a constituent part of the water pump according to the present invention.
9 is an assembled sectional view of the rotor which is a constituent part of the water pump according to the present invention;
10 is an exploded perspective view of another example of a rotor which is a constituent part of the water pump according to the present invention;

DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, so that those skilled in the art can easily carry out the present invention.

An automobile water pump A having an external rotor in which a permanent magnet is inserted according to the present invention includes a stator 2, a motor case 3, a pump case 4, and a rotor 5.

In the state where the stator 2 has a cylindrical shape and is fixedly installed by the stop pin 21 in the center inner space of the motor case 3 in which the upper portion is formed in the form of the upper portion around the center. The rotor body 51 is operated by the PCB substrate 11 installed in the lower motor cover 1, and is installed in a form surrounding the stator 2 in the space 32 around the stator 2. Magnetic force is acting on the permanent magnet (6).

The motor case 3 is injection molded of engineering plastic (PPS) material, the stator 2 is fixedly installed in the inner central space by the stop pin 21, and the shaft 31 is erected upright in the center of the upper surface thereof. In the installed state, it is installed on the motor cover 1 at the bottom of the water pump A, and the pump case 4 is coupled to the upper surface of the edge side, and the circumferential wall of the stator 2 side of the motor case 3 is installed. The inner periphery of the coupling part side of the pump case 4 and the space part 32 of a predetermined size are formed in such a manner that the upper surface thereof is opened, and the rotor main body 51 of the rotor 5 described later forms the stator 2. It is installed while being rotatable and wrapped.

At this time, the motor case 3 is provided with a zero ring 8, respectively, in the engaging portion of the upper pump case 4 and the lower motor cover 1 so as to maintain airtightness.

The pump case 4 is a hollow portion, the inlet 41 is formed on the upper side and the discharge port 42 on one side, respectively, the impeller body portion 52 of the rotor (5) in the inner hollow portion Is installed in a rotatable state.

The rotor (5) is made of an engineering plastic material, the upper part is a truncated conical impeller body (52), and the lower cylindrical part is composed of the rotor body (51) by injection molding integrally, The central part of the truncated conical body 52 is rotatably fitted to the shaft 31 installed upright on the upper surface of the motor case 3 via a bush 7 made of a ceramic material. 2) By rotating magnetically in the state where the rotor main body 51 is located to the outside, the some vane 54 provided in the impeller body part 52 of the upper surface rotates, and coolant is substantially made to rotate. Will be cycled.

In the cylindrical circumference portion of the rotor body 51 which is rotatably positioned in the space portion 32 of the motor case 3, an insertion groove 51a is formed to a certain depth, thereby forming a magnetic field of the stator 3. Correspondingly, a permanent magnet 6 made of a rotatable neodymium magnet or a ferrite sintered magnet is inserted, and the opening is fused and integrated with the covering 56 to finish the process.

In this case, the permanent magnet 6 may be configured in various forms such as a segment type or a cylindrical shape.

In addition, the upper surface of the vane 54 is shrouded in a state in which a plurality of vanes 54 are integrally installed in the impeller body portion 52 of the rotor 5 with a plurality of vanes 54 at an outlet angle of 20 ° to 35 °. Covered with (55) and integrally fused and installed, it is constructed in a closed type impeller method to minimize the flow loss of the fluid and reduce the axial force.

At this time, the integral molding of the vanes 54 with respect to the impeller body 52 of the stator 5, the injection molding of the impeller body 52 and the vanes 54 integrally, the upper part of the molded vanes 54 Although a configuration in which the cover 55 is fused and integrated into the cover 55 will be described as a representative example, as shown in FIG. 10, a plurality of vane attachment grooves 52a are formed in the impeller body 52 to cover the cover 55. ) And vanes 54 in a state in which the vanes 54 are fused and integrated with each other, the lower end of the vanes 54 in which the lid 55 is integrated is assembled into a plurality of vane attachment grooves 52a formed in the impeller body 52. The lower end of the vane 54 and the impeller body 52 may be integrally fused and installed in this manner.

In the above configuration, after the plurality of vanes 54 are integrated into the impeller body 52 or the permanent magnet 6 is inserted into the insertion groove 51a of the rotor main body 51, the opening is opened. The fusion operation integrated into the covering 56 is selectively performed among ultrasonic fusion, high frequency fusion, or thermal fusion, and does not specify the fusion.

Automotive water pump (A) having an external rotor with a permanent magnet according to the present invention having such a configuration, the impeller, which is a key component of the automotive water pump (A) is configured separately from the rotor (5) Rather, the rotor 5 is formed of the rotor body 51 and the impeller body portion 52, but the impeller body portion 52 is integrally formed in a truncated cone shape on the rotor body 51 side. In this state, the impeller is integrally formed with the rotor 5 by causing the impeller body 52 to have the vane 54 having the lid 55 integrally fused and formed.

Therefore, the configuration of the impeller and the rotor 5 can be simplified, and at the same time, the rotational power loss of the rotor 5 can be prevented to improve the driving efficiency of the impeller, and the rotor body constituting the rotor 5 ( 51. Magnetic properties of the stator 2 by inserting a neodymium (Nd) -based magnet having a strong coercive force or a permanent magnet 6 made of a ferrite sintered magnet into the insertion groove formed in the cylindrical periphery of 51). By keeping this strong for a long time, it is possible to improve the performance of the cooling water circulation operation by the vane 54 integrally fused to the impeller body 52 of the upper part of the rotor 5 to improve the performance of the automotive water pump A. Will be.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Such variations and modifications are intended to fall within the scope of the appended claims.

1: motor cover 2: stator
3: motor case 4: pump case
5: rotor 6: permanent magnet
7: bush 8: O-ring
11: PCB board 21: stop pin
31: shaft 41: inlet
42 discharge port 51 rotor body
51a: Insertion groove 52: Impeller body
54: vane 55: cover
56: covering

Claims (5)

In the automotive water pump (A),
It is installed on the motor cover 1 with the shaft 31 installed at the center of the upper surface upright, and the stator 2 is installed at the inner center by the stop pin 21, and the upper surface is opened to the outside of the circumference. A motor case 3 in which a portion 32 is formed;
Consists of the rotor body 51 and the impeller body 52, the insertion groove (51a) is formed in the cylindrical circumference of the rotor body 51 by fusion of the cover 56 after the permanent magnet 6 is inserted Closing, and integrally fusing and installing the vane 54 having a lid 55 on the impeller body 52, wherein the impeller body 52 is connected to the shaft 31 via a bush 7. A rotor (5) fitted and assembled, the cylindrical periphery of the rotor body (51) being inserted into the stator (2) outer space (32) of the motor case (3) and rotated;
An automobile water pump having an external rotor with a permanent magnet inserted therein, wherein the permanent magnet is inserted therein. The rotor of claim 1, wherein the vane (54) is fused and installed on the upper portion of the vane (54) with the cover (55) mounted on the upper portion of the vane (54). Car water pump having. The vane attaching groove (52a) is formed in the impeller body (52), and the lower end of the vane (54) having a cover (55) on the upper part is inserted into the vane attaching groove (52a). An automotive water pump having an external rotor with a permanent magnet inserted therein, which is fused and integrated. The water pump of claim 1, wherein the impeller body portion 52 has a truncated cone shape. The water pump for automobiles according to any one of claims 1 to 3, wherein all the fusions are high frequency fusion, ultrasonic fusion, or heat fusion.

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