KR101365465B1 - Air supply device for vehicles - Google Patents

Abstract

The present invention relates to a vehicle air supply device, and more particularly, to form a diffuser passage bent and to form a volute on the upper side of the diffuser passage to secure a sufficient length of the diffuser passage to increase the pressure conversion performance while the overall system Size can be reduced, and by installing a guide that guides the air flow to the inlet of the impeller as a separate part, it minimizes the loss caused when the air passing through the motor housing flows into the inlet of the impeller and reduces the weight of the outlet duct. It relates to a vehicle air supply device that can be.

The present invention is a motor unit for rotating the rotating shaft 141 is installed in the center 140; A motor housing 130 in which the motor unit 140 is inserted / installed in an upper and lower direction at the center thereof and an air passage 134 penetrates in an upper and lower direction around the outer direction of the motor unit 140; An inlet duct 110 coupled to the upper edge of the motor housing 130 and guiding air introduced through the inlet 111 to the air passage 134 of the motor housing 130; An impeller 170 coupled to a lower end of the rotation shaft 141 to compress air while rotating together with the rotation shaft 141; Coupled to the lower end of the motor housing 130 and to the air passing through the air flow path 134 of the motor housing 130 to the impeller 170 to be discharged to the outlet 164, the inner bottom The impeller accommodating part 161 is formed to rotatably receive the impeller 170 and communicates with the air flow path 134, and the kinetic energy of the air blown through the impeller 170 is converted into pressure to pass therethrough. The first passage 162a extending in the radial direction of the impeller receiving portion 161 and the second passage 162b extending in the axial direction of the rotation shaft 141 from the first passage 162a to be formed. A volute 163 is formed in communication with a diffuser passage 162 and an upper side of the diffuser passage 162 and collects compressed air while passing through the diffuser passage 162 to the outlet 164. Including the outlet duct 160 consisting of And that is characterized.

Air Supply Unit, Outlet Duct, Volute, Diffuser Path, Guide

Description

Air supply device for vehicles

The present invention relates to a vehicle air supply device, and more particularly, to form a diffuser passage bent and to form a volute on the upper side of the diffuser passage to secure a sufficient length of the diffuser passage to increase the pressure conversion performance while the overall system Size can be reduced, and by installing a guide that guides the air flow to the inlet of the impeller as a separate part, it minimizes the loss caused when the air passing through the motor housing flows into the inlet of the impeller and reduces the weight of the outlet duct. It relates to a vehicle air supply device that can be.

In general, the vehicle is equipped with an engine for driving the vehicle, these vehicles are divided into gasoline vehicle, diesel vehicle, LPG vehicle, etc. according to the fuel used in the engine. Such vehicles are driven by a starter motor powered from a battery at start-up to rotate a flywheel fixed to one end of the crankshaft, thereby rotating the crankshaft to reciprocate the connecting rod connected thereto to operate the engine.

On the other hand, the diesel vehicle is provided with a so-called air supply device that improves the output of the engine by supplying the engine by compressing the air sucked into the engine by turning the turbine (turbine) with the energy of the exhaust gas to increase the output of the engine.

As shown in FIG. 1, the air supply device 1 includes a turbine unit 2 and a compression unit 3 integrally coaxially with a bearing housing 4 interposed therebetween, and the turbine unit 2. And the turbine wheel 6 and the impeller 7 of the compression section 3 are attached to both ends of one rotation shaft 5 supported by the bearing housing 4. Accordingly, when the exhaust gas discharged from the engine rotates the turbine wheel 6 while passing through the turbine unit 2, the impeller 7 of the compression unit 3 rotates at the same time to compress the intake air and compress the compressed air. Supplying the fuel into the cylinder of the engine improves the output of the engine by improving the volumetric efficiency.

However, when turning the turbine wheel 6 using the exhaust gas of the engine, there is a problem that excessive noise and vibration occurs in the air supply device 1 by the pulsation of the engine exhaust gas.

In addition, in the fuel cell vehicle, the use of the exhaust gas is not possible, and thus the air supply device 1 using the exhaust gas as the energy described above cannot be used. Accordingly, in the fuel cell vehicle, a separate driving is performed for driving the air supply apparatus. The motor is installed.

For reference, a fuel cell is formed by stacking a plurality of cells, which is called a stack, and supplies a fuel (hydrogen gas) and air (oxygen) to the stack, and an electrochemical reaction proceeds by reverse electrolysis of water. As a battery system that generates electricity and heat, it can actually be considered as a power generation device.

Here, the air supplied to the stack is supplied through an air supply device 10 driven by a motor, and FIG. 2 is a diagram showing such an air supply device 10 for a fuel cell vehicle. A motor housing 11 configured to install a stator 13 around the rotary shaft 12 to rotate the rotary shaft 12, a motor housing 15 accommodating the motor unit 11, and the rotary shaft 12. It is coupled to one end of the impeller 16 to compress the air, and coupled to the front of the motor housing 15 to accommodate the impeller 16 and the inlet (17a) during the rotation of the impeller 16 Compression housing 17 for compressing the air sucked through and discharged to the volute 17b, and a bearing housing coupled to the rear of the motor housing 15 to rotatably support the other end of the rotating shaft 12 ( 18).

In addition, a magnet (not shown) is installed inside the rotating shaft 12.

Accordingly, when the rotary shaft 12 is rotated by driving the motor unit 11, the impeller 16 in the compression housing 17 is rotated at the same time while the air passes through the inlet 17a of the compression housing 17. Is inhaled. The air sucked in this way obtains kinetic energy while passing through the impeller 16 and is converted into pressure while passing through the diffuser passage 17c of the compression housing 17 to be collected into the volute 17b. In 17b, the pressure rises, and the air with this pressure rises is supplied to the stack.

On the other hand, the compression housing 17 or the bearing housing 18 is provided with a ball bearing 14 for rotatably supporting the rotating shaft 12.

However, in the conventional air supply device 10, when the length of the diffuser passage 17c is extended in the radial direction to increase the pressure switching performance, the size of the entire system is also increased, and the mounting space is narrow. Since the size of the system is limited due to the characteristics of the vehicle components, the length of the diffuser passage 17c may not be sufficiently secured, and thus there is a limit to increase the pressure switching performance.

An object of the present invention for solving the above problems is to form a diffuser passage bent and to form a volute on the upper side of the diffuser passage to sufficiently secure the length of the diffuser passage to increase the pressure conversion performance while the size of the overall system In addition, by installing a guide that guides the air flow to the inlet of the impeller as a separate part, it is possible to minimize the loss caused when the air passing through the motor housing flows into the inlet of the impeller and to reduce the weight of the outlet duct. To provide an air supply.

The present invention for achieving the above object is a motor unit for rotating a rotating shaft installed in the center; A motor housing in which the motor unit is inserted / installed in an up and down direction at the center thereof and an air flow passage penetrates up and down in an outer circumference of the motor unit; An inlet duct coupled to an upper edge of the motor housing and guiding air introduced through the inlet to the air flow path of the motor housing; An impeller coupled to a lower end of the rotating shaft to compress air while rotating together with the rotating shaft; It is coupled to the lower end of the motor housing and is formed to rotatably receive the impeller in the inner lower end so as to compress the air passing through the air flow path of the motor housing to the impeller to discharge to the outlet and communicate with the air flow path The impeller receiving portion and the first passage formed in the radial direction extending in the radial direction so that the kinetic energy of the air blown through the impeller is converted into the pressure and extends in the axial direction of the rotation axis in the first passage A diffuser passage formed of a second passage formed therein, and an outlet duct formed in communication with the upper side of the diffuser passage and a volute which collects compressed air while passing through the diffuser passage and sends the compressed air to the outlet side. It is characterized by.

According to the present invention, the diffuser passage is formed to be bent and a volute is formed on the upper side of the diffuser passage to sufficiently secure the length of the diffuser passage to increase the pressure switching performance and to reduce the size of the entire system.

In addition, by installing a guide for guiding the air flow to the air inlet side of the impeller as a separate component to minimize the loss caused when the air flows through the air inlet of the motor housing to the air inlet side of the impeller to improve the efficiency of the system It can improve the weight of outlet duct.

In addition, the second passage of the diffuser passage extends toward the guide side or the air inlet side of the impeller, and at the same time, the volute is disposed adjacent to the guide, thereby further reducing the size of the entire system.

In addition, since the air introduced through the inlet duct passes through the motor housing, there is an effect of cooling the motor unit.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Repeated explanations of the same configuration and operation as those in the conventional art will be omitted.

Figure 3 is a combined perspective view showing a vehicle air supply apparatus according to the present invention, Figure 4 is an exploded perspective view showing a vehicle air supply apparatus according to the present invention, Figure 5 is a combined cross-sectional view showing a vehicle air supply apparatus according to the present invention. 6 is a cross-sectional view illustrating a case in which the second passage of the diffuser passage is inclined in the vehicle air supply device according to the present invention.

As shown, the vehicle air supply device 100 according to the present invention serves to supply compressed air to the stack (stack) of the fuel cell vehicle.

The air supply device 100 is largely the motor unit 140, the motor housing 130, the inlet duct 110, the bearing holder 120, the impeller 170, the outlet duct 160, It is composed of an end plate 180.

First, the motor unit 140 is inserted into the center of the motor housing 130 and rotates the rotating shaft 141 is installed in the center.

The motor unit 140 includes a magnet 142 installed inside the rotating shaft 141 and a stator 145 provided at a predetermined interval in a radial direction of the rotating shaft 141 around the rotating shaft 141. It consists of.

Here, the stator 145 is known and is formed by winding a coil on a stator core assembly. Therefore, when the current is supplied to the stator 145, the rotation shaft 141 rotates.

In addition, the motor housing 130 has the motor unit 140 inserted / installed in an up and down direction at the center thereof, and an air flow path 134 is upward and downward around an outer circumference of the motor unit 140. It is formed to penetrate through.

That is, the motor housing 130 has an inner cylinder 131 in which the motor unit 140 is inserted and installed therein, and an outer cylinder having a larger diameter than the inner cylinder 131 while being concentric with the inner cylinder 131. 132 and a plurality of heat sinks 133 for integrally connecting the inner cylinder 131 and the outer cylinder 132. In addition, between the inner cylinder 131 and the outer cylinder 132, the air flow path 134 in the up and down directions so that the air flowing through the inlet duct 110 flows to the outlet duct 160 side. It is formed through.

The air passage 134 is divided by the plurality of heat sinks 133.

In addition, the heat sink 133 serves to cool the motor unit 140 by receiving heat generated from the motor unit 140 and exchanging heat with air passing through the air passage 134.

On the other hand, the motor housing 130 is formed with an installation hole 135 through which an electric wire passes to supply power to the motor unit 140 installed inside the inner cylinder 131.

In addition, a flange 136 is protruded from the lower outer circumferential surface of the motor housing 130 to be bolted to the upper end of the outlet duct 160.

In addition, the inlet duct 110 is coupled to the upper end of the outer cylinder 132 of the motor housing 130 as well as the inlet 111 is formed in the center of the upper end so that air can be introduced and the lower end is open. Therefore, the air flowing through the inlet 111 is guided to the air flow path of the motor housing 130.

In addition, the bearing holder 120 is located inside the inlet duct 110 is coupled to the upper end of the inner cylinder 131 of the motor housing 130 and the upper end of the rotating shaft 141 is rotatable. The bearing 125 is provided in the inner peripheral surface so as to support it.

That is, the bearing holder 120 has an inner circumferential ring 121 into which the bearing 125 is inserted / installed and a diameter larger than that of the inner circumferential ring 121 while being concentric with the inner circumferential ring 121. An outer circumferential ring 122 is fixed to the upper end of the inner cylinder 131 of the 130 and a plurality of stators 123 integrally connecting the inner circumferential ring 121 and the outer circumferential ring 122.

In this case, a passage 124 through which air flows is formed between the inner circumference ring 121 and the outer circumference ring 122, and part of the air introduced into the inlet duct 110 through the passage 124. Is supplied to the motor unit 140 side to further improve the cooling effect of the motor unit 140.

The impeller 170 is coupled to the lower end of the rotation shaft 141 and rotatably installed at the impeller accommodation portion 161 of the outlet duct 160 to be described below.

The impeller 170 has a plurality of streamlined wings 171 is formed on the outer circumferential surface. Therefore, when rotating together with the rotation shaft 141, the air is sucked through the inlet 111 of the inlet duct 110, the air thus sucked diffuser passage 162 provided in the radial direction of the impeller 170 Air is compressed in the process of blowing to the side.

In addition, the outlet duct 160 is open at both the upper and lower ends, and the open upper end is fitted to the outer peripheral surface of the lower end of the motor housing 130, and then the flange 136 and the bolt of the motor housing 130. The lower end is coupled to the open end plate 180 is bolted and sealed.

That is, the outlet duct 160 is formed to rotatably receive the impeller 170 at the lower end of the impeller accommodating part 161 communicating with the air flow path 134 of the motor housing 130, The first passage 162a and the first passage 162a extending in the radial direction of the impeller accommodation portion 161 so that the kinetic energy of the air blown through the impeller 170 may be converted into pressure and pass therethrough. A diffuser passage 162 formed of a second passage 162b extending in an axial direction of the rotation shaft 141 at an edge spaced from the impeller 170, and on an upper side of the diffuser passage 162. Communication is formed and consists of a volute (163) to collect the compressed air passing through the diffuser passage 162 to the outlet (164) side.

Here, the inner circumferential surface of the impeller accommodation portion 161 is formed in a curved surface along the outer surface of the wing 171 of the impeller 170, wherein the inner circumferential surface of the impeller accommodation portion 161 and the wing of the impeller 170 ( The smaller the space between 171), the higher the compression efficiency can be.

In addition, the volute 163 is formed in a spiral shape on the outer circumferential surface of the outlet duct 160, the diameter is gradually increased toward the outlet 164 side is located on the upper side of the diffuser passage 162.

In addition, when the impeller 170 rotates, air sucked from the upper side of the impeller 170 moves toward the volute 163 via the diffuser passage 162 provided in the radial direction of the impeller 170. The air is compressed in the process, that is, the kinetic energy obtained while the air passes through the impeller 170 is converted into pressure while passing through the diffuser passage 162. At this time, the longer the length of the diffuser passage 162, the higher the pressure switching efficiency.

Therefore, in order to compensate for the disadvantage that the size of the entire system increases together while sufficiently securing the length of the diffuser passage 162 to increase the pressure conversion efficiency, the diffuser passage 162 is formed to be bent.

That is, the angle formed by the first passage 162a and the second passage 162b of the diffuser passage 162 is preferably 90 to 150 degrees.

5 shows that the second passage 162b of the diffuser passage 162 is formed to be 90 degrees upward from the end of the first passage 162a. In this way, the length of the diffuser passage 162 can be secured sufficiently long to increase the pressure conversion efficiency, and the volute 163 is formed on the upper side of the diffuser passage 162 to prevent the entire system from growing. can do.

FIG. 6 illustrates that the second passage 162b of the diffuser passage 162 is inclined upward from the end of the first passage 162a. That is, the second passage 162b is formed to be inclined with respect to the first passage 162a within a range of 90 to 150 °. In this way, the same effect as in FIG. 5 can be obtained, and at the same time, the flow resistance of the air passing through the diffuser passage 162 can be reduced, thereby improving the efficiency of the entire system.

On the other hand, when the angle formed by the first passage 162a and the second passage 162b of the diffuser passage 162 is smaller than 90 °, the flow of air passing through the diffuser passage 162 changes rapidly (folds). This increases the flow resistance of the air and decreases the efficiency of the entire system, and when larger than 150 °, the flow resistance of the air passing through the diffuser passage 162 is reduced, but the overall system becomes large. have.

In addition, the end plate 180 is bolted to seal the open lower end of the outlet duct 160, so that the air sucked into the impeller accommodation part 161 during the rotation of the impeller 170 receives the diffuser passage 162. To flow).

In addition, the end plate 180 is provided with a bearing 181 on the inner circumferential surface to rotatably support the lower end of the rotating shaft 141.

In addition, the impeller 170 passes air passing through the air passage 134 of the motor housing 130 between the motor housing 130 and the impeller accommodation portion 161 inside the outlet duct 160. Streamlined guide 150 to guide to the air inlet side of the combination is coupled.

That is, the air sucked through the inlet 111 of the inlet duct 110 flows along the air passage 134 formed at the inner edge of the motor housing 130 and then the air of the impeller installed in the center of the outlet duct. The flow path must be changed drastically in order to flow into the inlet side. If the flow path connecting the outlet side of the air passage 134 and the air inlet side of the impeller 170 is suddenly changed, the efficiency of the system may occur.

Thus, the present invention is to minimize the loss caused when the air passing through the air flow path 134 of the motor housing 130 to the air inlet side of the impeller 170, the motor housing 130 and the The guide 150 is installed between the impeller accommodation portion 150.

That is, the guide 150 is formed in the shape of a curve having one inflection point 155 to prevent the flow direction of the air flow from sharply bent.

The inner circumferential surface of the guide 150 is formed with a concave curvature from the upper end to the inflection point 155, and is formed with a convex curvature from the inflection point 155 to the lower end. At this time, the center of curvature from the top to the inflection point 155 is located inside the guide 150, and the center of curvature from the inflection point 155 to the bottom is located outside the guide 150.

In addition, by separately manufacturing the guide 150 as a separate component, it is possible to empty the space between the volute 163 and the guide 150 to reduce the weight of the outlet duct 160. Can be.

In addition, the upper surface of the guide 150 is formed with a protrusion 151 is fitted to the inner peripheral surface of the outer cylinder 132 of the motor housing 130. In addition, the upper end of the guide 150 is coupled to the lower end of the motor housing 130 by a bolt.

On the other hand, the lower end of the rotary shaft 141 is installed in the center of the end plate 180 so as to prevent the separation of the bearing 181 to rotatably support the lower end of the rotating shaft 141 and the bolt 144 and 143 is coupled, and a cover 190 is coupled to the end plate 180 to protect the bearing 181.

7 is a cross-sectional view illustrating another embodiment of the vehicle air supply apparatus according to the present invention. As illustrated, the second passage 162b of the diffuser passage 162 extends toward the guide 150. It is. That is, the second passage 162b extends in the axial direction of the rotation shaft 141 at the end of the first passage 162a, but the end thereof extends toward the guide 150 side.

In this case, the volute 163 is disposed adjacent to the guide 150.

Therefore, the length of the diffuser passage 162 is sufficiently secured to increase the pressure switching performance while further reducing the overall size of the air supply device 100.

Meanwhile, in the above description, only the case where the second passage 162b of the diffuser passage 162 extends toward the guide 150 side is described. In addition, the second passage 162b is the air of the impeller 170. The same effect can be obtained even if it extends toward the inlet side.

Hereinafter, the operation of the vehicle air supply device 100 according to the present invention will be described.

First, when a current is supplied to the stator 145, the rotating shaft 141 is rotated, and when the rotating shaft 141 is rotated, the impeller 170 coupled to the lower end of the rotating shaft 141 also rotates together. do.

Thereafter, when the impeller 170 rotates, air is sucked through the inlet 111 of the inlet duct 110, and the sucked air flows along the air passage 134 of the motor housing 130. Done.

Air passing through the air passage 134 of the motor housing 130 is guided to the guide 150 and flows into the air inlet side of the impeller 170.

Subsequently, the air introduced into the impeller 170 is blown in the radial direction of the impeller 170, wherein the pressure is increased in the process of flowing to the volute 163 through the diffuser passage 162. The air whose pressure is increased by the volute 163 is discharged through the outlet 164 of the outlet duct 160.

The high pressure air discharged through the outlet 164 of the outlet duct 160 is supplied to the stack side.

On the other hand, while the inlet duct 110 and the motor housing 130 is bolted, the outlet duct 160 and the motor housing 130 has been described only for the bolted structure, but the inlet duct 110 and The motor housing 130 may be integrally formed or the outlet duct 160 and the motor housing 130 may be integrally formed.

1 is a cross-sectional view showing a general diesel engine vehicle air supply device,

2 is a cross-sectional view showing a conventional fuel cell vehicle air supply apparatus,

3 is a perspective view showing a vehicle air supply device according to the present invention;

4 is an exploded perspective view showing a vehicle air supply device according to the present invention;

5 is a cross-sectional view illustrating a vehicle air supply device according to the present invention;

6 is a cross-sectional view illustrating a case in which the second passage of the diffuser passage is inclined in the vehicle air supply device according to the present invention;

7 is a cross-sectional view showing a further embodiment of the vehicle air supply apparatus according to the present invention.

Description of the Related Art [0002]

100: air supply device 110: inlet duct

111: inlet 120: bearing holder

121: inner ring 122: outer ring

123: stator 124: passage

125,181: bearing

130: motor housing 131: inner cylinder

132: outer cylinder 133: heat sink

134: air flow path 135: installation worker

136: flange

140: motor portion 141: rotating shaft

142: magnet 143: bolt

144: washer 145: stator

150: guide 151: protrusion

155: inflection point

160: outlet duct 161: impeller receiving portion

162: diffuser passage 162a: first passage

162b: Second passage 163: volute

164: exit

170: impeller 171: wings

180: end plate 190: cover

Claims (10)

A motor unit 140 for rotating the rotating shaft 141 installed at the center; A motor housing 130 in which the motor unit 140 is inserted / installed in an upper and lower direction at the center thereof and an air passage 134 penetrates in an upper and lower direction around the outer direction of the motor unit 140; An inlet duct 110 coupled to the upper edge of the motor housing 130 and guiding air introduced through the inlet 111 to the air passage 134 of the motor housing 130; An impeller 170 coupled to a lower end of the rotation shaft 141 to compress air while rotating together with the rotation shaft 141; Coupled to the lower end of the motor housing 130 and to the air passing through the air flow path 134 of the motor housing 130 to the impeller 170 to be discharged to the outlet 164, the inner bottom The impeller accommodating part 161 is formed to rotatably receive the impeller 170 and communicates with the air flow path 134, and the kinetic energy of the air blown through the impeller 170 is converted into pressure to pass therethrough. In the axial direction of the rotary shaft 141 at the edge spaced apart from the impeller 170 of the first passage 162a and the first passage 162a extending in the radial direction of the impeller receiving portion 161 so that The diffuser (DIFFUSER) passage 162 consisting of an extended second passage (162b) and the upper side of the diffuser passage 162 is formed in communication with the compressed air while passing through the diffuser passage 162, the outlet 164 To the volute (163) It generated a vehicle air intake system comprising the outlet duct (160). The method of claim 1, The second passage (162b) of the diffuser passage (162) is a vehicle air supply apparatus, characterized in that formed in the upper direction 90 ° at the end of the first passage (162a). The method of claim 1, Inside the outlet duct 160, the air passing through the air passage 134 of the motor housing 130 between the motor housing 130 and the impeller receiving portion 161 is impeller 170. Vehicle air supply device, characterized in that the guide 150 is guided to the air inlet side of the combination. The method of claim 3, wherein The inner circumferential surface of the guide 150 is formed with a concave curvature from the upper end to the inflection point 155, and is formed with a convex curvature from the inflection point 155 to the lower end. The method of claim 3, wherein The second passage 162b of the diffuser passage 162 extends toward the guide 150 side. The method of claim 3, wherein The volute (163) is a vehicle air supply device, characterized in that disposed adjacent to the guide (150). The method of claim 1, The second passage 162b of the diffuser passage 162 extends toward the air inlet side of the impeller 170. The method of claim 1, The second passage 162b of the diffuser passage 162 is inclined at an end of the first passage 162a. The method of claim 1, Inside the inlet duct 110 is coupled to the upper end of the motor housing 130 and the bearing holder 120 is installed on the inner circumferential surface to rotatably support the upper end of the rotating shaft 141 is installed Vehicle air supply device, characterized in that. The method of claim 1, The end plate 180 is coupled to the lower end of the outlet duct 160 to seal the open lower end of the outlet duct 160 and a bearing 181 is installed on an inner circumferential surface to rotatably support the lower end of the rotation shaft 141. Vehicle air supply apparatus characterized in that the installation.

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