KR20110127852A - Bushings to reduce friction in the rotor equipped with a liquid pump for automobiles - Google Patents

Abstract

PURPOSE: A liquid pump for an automobile equipping with a bushing reducing the friction in a rotor is provided to reduce the noise and vibration by injecting a bushing with a rotator as one body. CONSTITUTION: A shaft(410) is into one body shaped on the top of a housing(400) and a stator(500) is inserted in the lower part and is coupled with the shaft. A rear housing has a PCB which contacts the stator and is coupled with the lower part of the housing. After flowing in the liquid as the inlet port while an impeller revolves in a rotor(300) in which shaft is inserted and revolving, a cover discharged to a vent is included. An abrasion resistance material bushing(320) is included in the central penetrating hole of the rotor revolving based on the shaft.

Description

Bushings to reduce friction in the rotor equipped with a liquid pump for automobiles}

The present invention is a liquid pump that can be used as a coolant pump in a vehicle or as a heating circuit, and is a cooling device suitable for feeding an automobile engine, in particular. The present invention relates to a configuration for preventing noise generated in a rotating rotor and reducing vibration.

In the prior art of the present invention, as shown in German application DE 10140613 (2001.08.18) of FIG. A pump cover 10 having a pump wheel 10 having a rotation drawn in the direction 12 and supplied through the discharge channel 18 in the direction of the arrow 16, and in which the suction channel 14 and the discharge channel 18 are arranged; 20 covers the pump wheel 10, the pump wheel 10 is fixedly connected to the shaft 22, and the rotor 24 of the motor 26 is connected to a shaft for driving the pump wheel 10. 22 is fixedly connected, the rotor 24 is surrounded by a stator package 30 comprising a winding 28, so that the magnetic axial traction acts in the same direction as the hydraulic axial traction. The medium supplied by 10 helps to cool the motor 26, which is transported behind the pump wheel 10. Reaching the rotor chamber 32 in the direction 12, the contact of the windings 28 or other electronic components with the supply medium when the electrically conductive liquid is fed should be avoided, instead the rotor 24 slit One side of the shaft 22 is enclosed and sealed by a port 34, the one end of which is supported in a first radial bearing 40 comprising a bearing sleeve 42 held in the slit port 34 and the other end of which is the opposite shaft end pump. The wheel 10 is supported on the support element 44 mounted thereon, and the opening 46 is cylindrical and coaxial to the shaft 22 and the bearing sleeve 48 is arranged and the sliding bearing is formed on the support element 44. There was a composition.

As another conventional technique, as shown in Korean Patent Application No. 10-2001-7009225 of FIG. 2 (July 23, 2001), the liquid pump 1 may be used as a coolant pump in a vehicle or as a heating circuit. It has a three part pump housing 33 consisting of a housing front part 30-a motor housing 2-a housing rear part 3 with a suction pipe 4 and a pressure pipe not shown, said parts 30, 2, 3 Are fixed and held by screws, and the sealing ring 10 is clamped or injection molded between the housing front part 30 and the motor housing 2, and the motor housing 2 is made of a nonmagnetic material. A rotor 6 is received in the tube 11, which forms a thin-walled zone in the form of a tube 11 with an inner wall 24, forming a cup with the base 12.

The rotor 6 comprises an outer cylinder 7 slightly spaced along the curve of the tube 11, rotates about the axis of rotation 35, and the outer cylinder 7 at its end facing the suction tube 4. It is closed by end walls 13 supporting a number of vanes 14.

The bearing shaft 8 integrally coupled with the end wall 13 extends through the interior of the cylinder 7, and the bearing shaft 8 is fixed to the shaft 9 at the axial ends 8 ′, 8 ″. Is rotatably supported about to surround the shaft over substantially the entire length.

A circulation flange 18 is disposed at the transition between the outer cylinder 7 and the end wall 13 of the rotor, and engages in the annular slot 19 of the motor housing 2 so that solid foreign matter is transferred from the coolant flow to the outer cylinder. Penetration into the narrow gap 20 between the tubes 11 is prevented.

The claw pole stator 21 is at least partly injection molded into the motor housing 2 and has a claw plate 26 that is at least partly an integral component of the motor housing 2, the pump of the liquid pump 1. The housing 33 has a housing rear part 3, and in the motor housing 2 or the housing rear part 3 a metal connection 44 which forms an electrical connection between the inside and the outside of the pump housing 33. There was a liquid pump which was injection molded.

However, the related arts are provided with a stator, a rotor, and a shaft in a housing, and an impeller is provided in the shaft. When the rotor and the shaft rotate, the impeller also rotates to rotate the liquid sucked from the inlet and discharge the discharge to the outlet. As a number of bearings or bearing sleeves must be provided between the shaft and the impeller or between the rotor and the stator to facilitate the rotation and reduce the noise, the cost of materials increases and the assembly time is increased. Due to the problem that the production efficiency is lowered and the liquid pump produced in the prior art has a problem that noise and vibration occurs to reduce the durability of the product and shorten the replacement cycle.

The present invention is to solve the above problems, in the liquid pump in order to reduce the friction between the fixed shaft and the rotor rotating around the shaft, the bushing is rotated with the fixed shaft by rotating the bushing integrally with the rotor Its purpose is to provide a configuration that reduces friction between electrons.

The present invention provides a friction between the fixed shaft and the rotating rotor by injecting the bushing integrally with the rotor to reduce the friction between the shaft fixed in the liquid pump and the rotor rotating around the shaft as described above. It has the effect of reducing the noise by reducing the noise and prevents the shaking.

1 is a cross-sectional view of a conventional vehicle liquid pump
2 is a cross-sectional view of another prior art
Figure 3 is a general configuration diagram of a liquid pump for a vehicle of the present invention a) exploded perspective view, b) assembly view, c) cross-sectional view
Figure 4 is a perspective view of the rotor and the shaft in the vehicle liquid pump of the present invention
5 is an assembled cross-sectional view of the rotor and the shaft and the housing in which the present invention is formed bushing;

The present invention relates to a liquid pump for a vehicle that can be used as a cooling water pump in a vehicle or for a heating circuit, and a detailed description thereof will be described with reference to the accompanying drawings.

3 is an overall configuration diagram of a liquid pump for a vehicle of the present invention, a) is an exploded perspective view, b) is an assembled view, c) is a sectional view, FIG. 4 is a perspective view of a rotor and a shaft in the liquid pump for a vehicle of the present invention, The assembly cross-sectional view of the rotor, shaft and housing in which the bushing is formed.

Portions similar to the prior art in the overall configuration of the present invention will be briefly described to clarify the features of the present invention.

The overall configuration of the liquid pump 100 of the present invention, as shown in Figure 3, the upper portion of the housing 400, the shaft 410 is integrally molded, the lower portion of the housing 400 is coupled to the stator and the core The stator 500 is inserted and the assembling screw 510 penetrating the center portion is coupled with the shaft 410 integrally formed with the housing 400 so that the housing, the shaft and the stator are integrally fixed, and a power supply is connected to the lower portion thereof. The rear housing 700 having the connector 710 formed therein is coupled to the housing 400 by the rear screw 720 in the state of embedding the PCB 600 as a control means, but the lower part of the stator 500 and the PCB 600 are connected thereto. Is a contact structure, the housing 400 is provided with a rotor insertion groove 420 that is a circular insertion groove along the inner side and the inner housing 430 is provided integrally inside the rotor insertion groove 420 The upper and lower portions of the housing 400 are hermetically sealed and blocked, and the housing The rotor 300 is inserted into the rotor insertion groove 420 of the 400. The upper side of the rotor 300 is provided with a plurality of impellers 310, which are pump wheels, along a circle, and through-holes in the center thereof. When the rotor 300 is inserted into the rotor insertion groove 420 of the housing 400, the shaft 410 is assembled while being inserted into the through hole at the center thereof and the rotor 300 rotates about the shaft 410. The impeller 310 of the rotor 300 has a cover 200 coupled to the housing 400 and the cover screw 230, the inlet 210, the liquid flows into the cover 200 And discharge outlet 220 is configured to be provided.

In addition, the shaft 410 integrally coupled with the stator 500 coupled to the stator and the core serves as a conventional motor.

In addition, since the inner housing 430 is integrally provided inside the electronic insertion groove 420 to seal and block the upper and lower portions of the housing 400 at the source, liquid flows into the rotor side of the upper housing 400. Although it is discharged, the liquid is prevented from flowing into the stator side of the housing 400 underneath. The stator side, which is operated by a motor, must be naturally waterproof since power is connected to generate a magnetic field. to be.

Looking at the operation according to the above configuration, when power is supplied to the connector 710 of the rear housing 700, the PCB 600 is operated to provide an operation signal to the stator 500 to generate a magnetic field, but with the housing 400 The stator 500 and the shaft 410 fixed integrally are fixed without being rotated. In this state, the rotor 300 inserted into the rotor insertion groove 420 formed inside the upper part of the housing 400 is fixed. It rotates based on the shaft 410 integrally formed in the housing 400 by the magnetic field action, and when the rotor 300 rotates, the impeller 310 integrally provided on the top of the rotor 300 rotates. The liquid is introduced into the inlet 210 formed in the cover 200 to be discharged to the outlet 220.

The characteristic configuration of the present invention, as shown in Figures 4 to 5, the bushing 320 is a wear-resistant material and excellent waterproof and durable material in the center through hole of the rotor 300 is inserted into the shaft 410 It was formed by integrally forming, the material of the bushing 320 is applied to the peak (PEEK: P- E ther- E etone- K etone), but it is clear that all materials having excellent wear resistance in addition to the peak can be applied.

When the bushing 320 of the wear-resistant material is provided in the center through hole of the rotor 300 into which the shaft 410 of the present invention is inserted, the stator 500 and the assembly screw fixed to the lower part of the housing 400 are assembled. When the shaft 410 coupled to the 510 is inserted into the bushing 320 of the rotor 300 and assembled, power is turned on to generate a magnetic field in the stator 500 so that the rotor 300 rotates. The rotor 300 does not rotate in contact with the shaft 410 which is directly stopped, but because the bushing 320 provided in the rotor 300 rotates while contacting the shaft 410. The bushing 320 prevents or reduces the occurrence of vibration or noise generated between the shafts 410, to facilitate the rotation of the rotor, and to drive the liquid pump 100 of low noise and low vibration. It also reduces noise in the applied equipment. The effect is even greater.

Here, PEEK (polyether ether ketone), which is a material of the bushing 320, has the following chemical structural formula and has the highest level of heat resistance among engineering plastics, and also has flame retardancy, hot water resistance, and chemical resistance. It is used for IC wafer carrier, LCD jig, etc.

Chemical formula:

In the assembly of the shaft 410 and the rotor 300 of the present invention, the shaft 410 is inserted through the bushing 320 provided in the center of the rotor 300, the end of the shaft 410 It was provided in the form of a D-shaped protruding about 5 [mm] to the upper portion of the rotor 300 was fixed by the washer 810 and the D-ring 800 to be forced to the D-shape of the end of the shaft 410.

The reason why the rotor 300 is fixed so as not to fall out of the shaft 410 by the D-ring 800 is that when the rotor 300 is rotated about the shaft 410, the rotor 300 is to be lifted upwards. Since thrust is generated and a large vibration may occur during internal failure or rotation at a high speed, it may cause noise. The thrust generated when the rotor 300 rotates by inserting the D-ring 800 into the shaft 410 Offset role.

The present invention can be used in the industry of manufacturing cooling devices suitably feeding automotive engines, as well as in the equipment or appliance industry applying them as liquid pumps that can be used as cooling water pumps in vehicles or for heating circuits.

100. Liquid pump 200. Cover
300. Rotor 320. Bushing
400. Housing 410. Shaft
500. Stator 600. PCB
700. Rear Housing

Claims (4)

The shaft 410 is integrally formed on the upper part of the housing 400, and the stator 500 is inserted into the lower part thereof to be coupled to the shaft. In the rotor that is coupled and the rotor is rotated by inserting the impeller is rotated in the liquid liquid pump 100 for a vehicle having a cover 200 for introducing the liquid into the inlet 210 and then discharged to the outlet 220,
If the bushing 320 made of a wear-resistant material is provided in the center through hole of the rotor 300 rotating based on the shaft 410, the bushing rotates in contact with the shaft, thereby generating vibration or noise generated between the rotor and the shaft. A liquid pump for a vehicle provided with a bushing for reducing friction on the rotor, characterized in that the reduction and ease of rotation.
The vehicle liquid pump of claim 1, wherein the bushing (320) is made of a peak (polyetheretherketone).
According to claim 1, wherein the rotor 300 is inserted into the rotor insertion groove 420 of the inner side of the housing 400, the inner housing 430 is provided integrally with the housing inside the rotor insertion groove A liquid pump for a vehicle provided with a bushing for reducing friction in the rotor, the rotor rotating while blocking the upper and lower portions of the housing.
According to claim 1, When the shaft 410 and the rotor 300 is assembled, the end of the shaft inserted through the bushing 320 provided in the center of the rotor in the form of a D-shaped to about 5 than the rotor And a bushing for reducing friction on the rotor, characterized in that it protrudes about [mm] and is fixed to the shaft end having a D shape by the D-ring 800 to cancel the thrust generated when the rotor rotates. Pump.

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