KR20110058589A - Electric water pump - Google Patents

Abstract

PURPOSE: An electric water pump is provided to enable a user to control the cooling water discharging angle and direction at a vehicle. CONSTITUTION: An electric water pump comprises an electric motor(110), a volute cover(130), an interface part(120) and a connecting part. The electric motor rotates the impeller. The volute cover forms an inlet(131) and an outlet(132). The interface part comprises a mechanical seal. The mechanical seal is inserted between the interface part and electric motor. The interface part is inserted between the electric motor and volute cover. The connecting part controls the direction and angle of the inlet and outlet of the volute cover. The connecting part connects the interface part to the electric motor using bolts in a desire angle.

Description

Electric water pump

The present invention relates to a water pump, and more particularly, to an electric water pump that can be mounted by adjusting the discharge direction and angle of the coolant in a vehicle freely.

As is well known, a water pump that circulates coolant in a vehicle has been widely applied to an engine driven type in which an engine power is transmitted through a pulley and a belt in the case of a general internal combustion engine vehicle.

Recently, an electric water pump driven by electricity instead of an engine driven water pump is used. When an electric motor is driven by electricity provided by a battery, an impeller rotates to suck and discharge cooling water.

Electric water pumps are known to increase fuel efficiency by 2 to 3% because they do not require engine driving power, and they are already widely applied to mass production vehicles by many automobile companies because they can precisely control the coolant temperature. .

In the case of electric vehicles such as hybrid vehicles, there is a situation in which engine driving is stopped, such as EV mode, and in the case of fuel cell vehicles or pure electric vehicles, engines for driving water pumps are not mounted. It is essential to use an electric water pump as a water pump.

1 is a configuration diagram of a cooling system to which an electric water pump is applied, and as shown, a cooling system of a fuel cell, a hybrid, and an internal combustion engine vehicle (a general engine vehicle such as gasoline) includes an engine (stack) cooling system and an electric field cooling system. Consists of.

Among them, the cooling system of the engine or the stack circulates the coolant in the engine or the stack by using an electric water pump to discharge the combustion heat of the engine or the reaction heat of the stack, and the electric water pump for circulating the coolant, the reservoir in which the coolant is stored, and the It consists of a radiator for dissipating heat to the outside and a three-way valve that selects the circulation path of the coolant.

With this configuration, it is necessary to discharge the heat generated from the engine or the stack through the coolant, which is a heat transfer and transport medium, and to control the temperature of the coolant to satisfy the operating conditions and the efficiency of the engine or the stack.

In the electric field cooling system, a small electric pump and a radiator are applied to cool the drive motor, the air blow controller, the high voltage / low voltage DC converter, the drive motor controller, the high voltage junction box, and the like to transfer and dissipate heat. have

On the other hand, the electric water pump for vehicles is widely used a volute pump (volute pump), which is a kind of centrifugal pump, which includes an impeller (wing car) that is rotated by an electric motor, and when the impeller is rotated by the driving of the electric motor. The cooling water sucked through the suction port at the center of the volute casing is discharged to the discharge port by the centrifugal force generated at this time while passing through the spiral seal provided in the volute casing.

Figure 2 is a perspective view of a conventional electric water pump, as shown, comprising an electric motor 10 as a drive source and a hydraulic portion 20 for generating the suction force / soil output of the coolant, the hydraulic portion 20 includes a volute casing 21 in which a spiral flow space, that is, a spiral seal is formed, and an impeller (not shown) rotated by the electric motor 10.

The conventional electric water pump 1 has an interface part for sealing and intercepting a space in which water flows and a motor chamber, that is, a mechanical seal (not shown) is integrally mounted in the motor housing 1a. The volute casing 21 having the suction port 22 and the discharge port 23 is covered thereon.

In addition, the mounting portion 12 is formed in the motor housing 11, through which the electric water pump 1 is mounted on the vehicle body, at which time the mechanical seal and mechanically integrated in the motor housing 11 and the motor housing 11 The whole volute casing 21 integrated into the motor housing 11 through the seal is fixedly mounted.

Therefore, such a conventional electric pump has the following problems.

Since the volute casing 21 is integrated with the electric motor 10 through the mechanical seal mounted inside the motor housing 11, the direction and angle of cooling water discharge of the volute casing are fixed with respect to the motor housing fixed to the vehicle body. Becomes

That is, the conventional water pump 1 has a structure in which the body casing portion is covered by the volute casing 21 having the inlet port 22 and the outlet port 23 in a state where the mechanical seal is integrated in the motor housing 11. The positions, directions, and angles of the suction port 22 and the discharge port 23 with respect to the phosphorous electric motor 1 are determined and manufactured from the time of design.

Since the water pump is an integral structure that does not rotate or change the direction of the volute casing with respect to the vehicle mounting portion (motor housing and mounting portion), the motor housing of the motor housing assembled to the vehicle body by the mounting portion of a predetermined position in a specific vehicle model Once the mounting position and direction are determined, it is not possible to flexibly change the direction of the volute casing integrated in the motor housing or to assemble the volute casing by rotating it separately (fixing the coolant discharge port).

As a result, when it is necessary to change the cooling water discharge direction for each vehicle type, engine type, vehicle structure, and packaging, a pump having a different structure is required for each vehicle type, and the design of the pump is changed to reset the discharge direction for each new vehicle development and mass production. This is necessary.

Accordingly, the present invention has been invented in view of the above, and can be commonly used for various types of vehicles by allowing the assembly of the electric motor fixedly mounted to the vehicle body by adjusting the cooling water discharge direction and angle of the volute casing freely. The object is to provide an electric water pump.

In order to achieve the above object, the present invention,

An electric motor;

A volute cover having a suction port and a discharge port and forming a front portion of the spiral seal;

An interface unit having a mechanical seal interposed between the electric motor and interposed between the electric motor and the volute cover to form a rear portion of the spiral seal;

Composed of separated,

It provides an electric water pump, characterized in that it has a rotary mounting fastening part for fastening the bolt by rotating the interface to a desired angle with respect to the electric motor so that the direction and angle of the inlet and outlet of the volute cover can be adjusted.

In a preferred embodiment, the rotation mounting fastening portion, the bolt portion screw holes or bolt insertion through-hole at equal intervals along the circumferential direction of the interface portion to which the motor housing fastening portion of the electric motor is coupled is configured to form It is characterized by.

In another embodiment, the rotation mounting fastening portion, by forming a bolt hole or a bolt insertion through hole at equal intervals along the circumferential direction of the motor housing rim portion of the electric motor coupled to the fastening portion of the interface unit It is characterized in that the configuration.

In another embodiment, the rotation mounting fastening portion, the fixed to the motor housing fastening portion at equal intervals along the circumferential direction along the circumferential direction of the interface portion coupled to the motor housing fastening portion of the electric motor It is characterized by.

In another embodiment, the rotation mounting fastening portion, the motor housing rim portion of the electric motor coupled to the fastening portion of the interface unit is configured by fixing the bolts fastened to the fastening portion of the interface portion at equal intervals along the circumferential direction It is characterized by.

Accordingly, the electric water pump of the present invention has the following advantages.

1) Unlike engine driven mechanical pumps mounted on the engine, electric water pumps require a separate packaging space. In this case, the electric pump exists as an independent packaging regardless of the specifications of the engine or the stack, and in the past, it was necessary to redesign to cope with each vehicle in the case of different vehicle types even in the same cooling system.

On the other hand, the electric water pump of the present invention is configured to separate the interface unit (which forms a spiral seal together with the volute cover) with the mechanical housing and the mechanical housing with a mechanical seal, the inlet port of the volute cover (when installed in the center angle change None) and the discharge port can be mounted on the electric motor by rotating the volute cover and the interface part to the desired direction and angle.It can be assembled by adjusting the angle of the inlet and outlet of the pump to fit the packaging in various models only with the standard structure. .

In particular, since only the standard structure needs to be applied, it is unnecessary to redesign and manufacture the pump to cope with each vehicle, and above all, it is not necessary to manufacture a pump-specific mold according to the type of vehicle. do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention.

The present invention relates to an electric water pump, and more particularly, to an electric motor fixed to a vehicle body, an electric motor capable of freely adjusting and assembling the suction / discharge direction and angle of a volute casing in which coolant is sucked and discharged according to an applied vehicle type. It relates to a water pump.

In the case of the electric water pump, there is a disadvantage in that the mass production cost is higher than that of the engine driven water pump.In order to reduce the gap, the pump having a fixed cooling water discharge direction is designed and manufactured according to the vehicle type, engine type, vehicle structure, and packaging. Rather, it is necessary to apply a standard structure that can be used in multiple vehicles to be able to flexibly respond to the application of multiple models and new models.

To this end, the present invention requires a volute casing (the following volute cover and interface portion forming a spiral seal) so that the cooling water suction and discharge directions of the pump can be easily mounted without changing the structure and design according to the application model. It provides a structure that can be assembled by rotating as much as possible.

Figure 3 is a front perspective view of the electric water pump according to an embodiment of the present invention, Figure 4 is a rear perspective view of the electric water pump according to an embodiment of the present invention, Figure 5 is an electric water pump according to an embodiment of the present invention Front perspective view with the volute cover removed.

In addition, Figure 6 is a rear view showing the assembly of the volute cover and the interface unit in the electric water pump according to an embodiment of the present invention, the screw holes 123 at equal intervals along the rear edge portion 122 of the interface unit 120 (Thread processing on the inner circumference) is formed, and the spiral flow path 121 for forming a spiral seal inside the interface portion 120 is shown.

In addition, Figure 7 is a rear perspective view of the motor housing removed from the electric water pump according to an embodiment of the present invention, such as along the rear edge portion 122 of the interface unit 120 in the motor body 111 assembled state It shows a structure in which the screw holes 123 are formed.

As shown, the electric water pump 100 of the present invention is a volute pump, which is a kind of centrifugal pump, and has a helical seal and an impeller, a hydraulic power unit for generating suction power and earth output of cooling water, and the impeller. It has an electric motor 110 as a drive source for rotating.

Looking specifically at the configuration, a spiral seal which is a flow space of water while having an electric motor 110 and a mechanical seal (not shown) interposed between the electric motor 110 and the electric motor 110 is driven by the power applied from the outside Interface portion 120 to form a rear portion of the suction port 131 and the discharge port 132 is formed and divided into three parts of the volute cover 130 forming the front portion of the spiral seal.

Electric motor 110 is a motor body 111 to generate a rotational force for rotating the impeller (not shown) as in the prior art and the motor housing 112 surrounding the motor body 111 is assembled integrally It is configured.

At this time, the motor body 111 has a conventional configuration having a stator and a rotor (including a rotating shaft), the motor housing 112 is provided with a mounting portion such as a mounting bracket 113 for mounting the vehicle body.

The motor compartment, which is an inner space in which the stator and the rotor are installed in the motor main body 111, is sealed by a mechanical seal provided on the rear portion of the interface unit 120, and the interface unit 120 and the volute cover by the mechanical seal ( Spiral thread formed by 130 is blocked to be completely separated in space.

However, the rotating shaft of the motor main body 111 is connected to the impeller positioned in the helical thread while the sealing is maintained through the mechanical seal, thereby allowing the impeller to rotate when the rotating shaft is rotated.

The interface unit 120 has a rear portion coupled to the front portion of the motor main body 111, and the mechanical seal provided at the rear portion seals the motor chamber of the motor main body 111 separately from the motor housing 112. There is a clear difference from the conventional structure in which the seal is integrally mounted inside the motor housing 112.

That is, the interface part 120 provided with the mechanical seal at the rear portion is a structure separated from the motor housing 112, and the mechanical seal is separated from the interior of the motor housing 112, rather than being integrally mounted. There is a clear difference in that the interface unit 120 of the structure, and the interface unit 120 is a separate component that is interposed between the electric motor 110 and the volute cover 130 is assembled. .

In addition, the electric water pump 100 of the present invention has a structure in which the spiral flow path 121 is formed on the inner surface of the interface unit 120 so that the inner space of the interface unit 120 forms the rear portion of the spiral seal. The spiral flow path 133 is formed on the inner surface of the volute cover 130 so that the inner space of the cover 130 forms the front portion of the spiral seal.

The spiral cover is formed in the state in which the volute cover 130 and the interface unit 120 are combined together, and the assembly of the two parts serves as a volute casing that generates rotational force and centrifugal force (earth output) of water. .

The rear edge portion 122 of the interface portion 120 is a portion that is coupled to the front fastening portion 114 of the motor housing 112 surrounding the motor body 111, the rear edge portion of the interface portion 120 The front fastening part 114 of the 122 and the motor housing 112 are bolted together so that the interface part 120 and the electric motor 110 are integrally assembled.

As such, the volute cover 130 and the interface unit 120 are assembled to form a spiral seal to serve as a conventional volute casing, and to rotate along the spiral seal in a state in which water is sucked, thereby centrifugal force, that is, earth output. This will occur.

In the central portion of the volute cover 130, a suction port 131 is provided at a center thereof, and a discharge port 132 is provided to discharge water in a tangential direction of the water flow direction (water rotation direction) of the spiral seal, and the volute cover 130 is provided. The fastening part 134 and the fastening part 124 of the interface part 120 are fastened by a bolt fastening method so that the volute cover 130 and the interface part 120 are integrally assembled.

As a result, the coolant sucked through the suction port 131 in the center of the volute cover 130 passes through the spiral seals provided in the volute cover 130 and the interface unit 120, and is generated by the centrifugal force generated at this time. The discharge port 132 is discharged.

Meanwhile, since the assembly of the volute cover 130 and the interface unit 120 is a volute casing having a spiral seal, water is discharged to the electric motor 110 fixed to the vehicle body, that is, the discharge port. In order to easily adjust the direction of the assembly 132, the component coupled to the motor housing 112 of the electric motor 110, that is, the interface unit 120 is rotated by a desired angle with respect to the motor housing 112 It has a fastening portion for rotation mounting that can be assembled.

As shown in FIGS. 6 and 7, the rotation mounting fastening part may be spaced at equal intervals along the circumferential direction of the rear edge portion 122 of the interface part 120 to which the fastening part 114 of the motor housing 112 is fastened. It may be configured to form a screw hole 123, the thread is processed in the inner circumference.

When the screw holes 123 are formed at equal intervals along the edge portion 122 of the interface unit 120, the interface unit 120 may be assembled by appropriately rotating the motor housing 112, and thus the interface unit 120 may be assembled. ), The directions of the suction port 131 and the discharge port 132 of the volute cover 130 can be set in a desired direction.

That is, the interface unit 120 may be rotated as much as desired to be coupled to the motor housing 112, and the fastening portion 114 of the motor housing 112 may be connected to a screw hole selected from the screw holes 123 at equal intervals. Since it is possible to fasten, the inlet 131 of the volute cover 130 (no change when located in the center of the volute cover as shown in the example) according to the vehicle state such as the vehicle model, the engine model, the vehicle structure, and the packaging; It is possible to adjust the discharge port 132 to a desired direction and angle.

For example, when 24 screw holes 123 are formed at equal intervals in the edge portion 122 of the interface unit 120 at an equal interval, the assembly of the discharge port 132 by changing the angle of the total 24 angles is performed. It becomes possible.

When assembling, as shown in FIG. 6, the interface unit 120 and the volute cover 130 are first assembled, and then the interface unit 120 is formed by setting the discharge port 132 of the volute cover 130 to a desired angle. Assembled in the motor housing 112, in which the bolt is inserted into the fastening hole (114a) formed in each fastening portion 114 of the motor housing 112 to be fastened to the screw hole 123 of the interface unit 120.

In this way, the water pump 100 is mounted on the vehicle by assembling the interface unit 120 by appropriately rotating the assembly to set the angle of the discharge port 132 to the desired angle.

On the other hand, as described in the illustrated embodiment has been described that the interface mounting portion 120 is provided with a rotary mounting fastening, but instead of forming the same rotary mounting fastening portion on the interface 120, the front of the motor housing 112 It is also possible to form the edge portion.

That is, a plurality of fastening parts are formed on the rear surface of the interface part 120, and instead, the threaded holes are machined in the inner circumference along the circumferential direction at the front rim of the motor housing 112 to which the fastening parts are coupled at equal intervals. To form.

In this way, a screw hole may be formed at the front rim of the motor housing 112 to include a fastening part for rotation mounting, and the interface port 120 may be formed by discharging the opening 132 of the volute cover 130 to a desired angle. Assembled in the motor housing 112, in which the bolt is inserted into the fastening hole formed in each fastening portion of the interface unit 120 to be fastened to the screw hole of the motor housing 112.

In addition, as another embodiment of the present invention, although not shown in the drawings, instead of the threaded hole in the inner periphery, the through hole through which the bolt is simply inserted through the rear edge portion 122 or the motor housing of the interface unit 120 ( It is possible to form at equal intervals in the front rim of the 112.

In this case, the bolt is inserted into the through hole at the fastening hole formed at each fastening portion of the motor housing 112 or the fastening hole formed at the fastening portion of the interface portion 120, and then the nut is fastened so that each bolt is removed from the fastening hole and the through hole. To be fixed.

In addition, as another embodiment of the present invention, although not shown in the drawings, the plurality of bolts are fixed along the circumferential direction at equal intervals at the rear edge portion 122 of the interface unit 120 or the front edge portion of the motor housing 112. It is possible to install.

That is, the bolts are installed on the rear edge portion 122 of the interface unit 120 at equal intervals along the circumferential direction, and the discharge port 132 of the volute cover 130 is set to a desired angle. ) Is assembled to the motor housing 112, and the selected bolts of the various bolts of the interface unit 120 are inserted into the fastening holes formed in the respective fastening portions of the motor housing 112, and then the nuts are fastened by fastening nuts at opposite sides. .

On the contrary, in the case where the bolts are fixed at equal intervals along the circumferential direction at the front rim of the motor housing 112, the outlet portion 132 of the volute cover 130 is set to a desired angle so that the interface unit 120 is opened. Assembled in the motor housing 112, the selected bolt of the various bolts of the motor housing 112 is inserted into the fastening hole formed in each fastening portion of the interface unit 120, and then fastened by fixing the nut from the opposite side.

In this way, the electric water pump of the present invention has the following advantages.

Unlike engine-driven mechanical pumps mounted on the engine, electric water pumps require a separate packaging space. In this case, the electric pump exists as an independent packaging regardless of the specifications of the engine or the stack, and in the past, it was necessary to redesign to cope with each vehicle in the case of different vehicle types in the same cooling system.

On the other hand, the electric water pump 100 of the present invention is configured to separate the interface unit 120 having a mechanical seal (to form a spiral seal with the volute cover) from the motor housing 112, the volute cover ( The volute cover 130 and the interface unit 120 are rotated so that the suction port 131 (the angle is not changed when installed in the center) and the discharge port 132 of the 130 are in a desired direction and angle to the electric motor 110. It can be mounted, and the standard structure can be assembled by adjusting the angle of the inlet and outlet of the pump to suit the packaging of various vehicles.

In particular, since only the standard structure needs to be applied, it is unnecessary to redesign and manufacture the pump to cope with each vehicle, and above all, it is not necessary to manufacture a pump-specific mold according to the type of vehicle. do.

The embodiments of the present invention have been described in detail above, but the scope of the present invention is not limited to the above-described embodiments, and various modifications of those skilled in the art using the basic concepts of the present invention defined in the following claims and Improved forms are also included in the scope of the present invention.

1 is a configuration diagram of a cooling system to which an electric water pump is applied.

2 is a perspective view showing a conventional electric water pump.

3 is a front perspective view of the electric water pump according to the embodiment of the present invention.

4 is a rear perspective view of the electric water pump according to the embodiment of the present invention.

5 is a front perspective view of a state in which the volute cover is removed from the electric water pump according to the exemplary embodiment of the present invention.

6 is a rear view showing the assembly of the volute cover and the interface unit in the electric water pump according to the embodiment of the present invention.

7 is a rear perspective view of the motor housing removed from the electric water pump according to the embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

100: electric water pump 110: electric motor

111: motor body 112: motor housing

113: mounting bracket 114: fastening portion

120: interface portion 121: spiral flow path

122: edge portion 123: screw hole

124: fastening portion 130: volute cover

131: suction port 132: discharge port

133: spiral flow path 134: fastening portion

Claims (5)

An electric motor 110 for rotating the impeller; A volute cover 130 having a suction port 131 and a discharge port 132 and forming a front portion of the spiral seal; An interface unit 120 having a mechanical seal interposed between the electric motor 110 and interposed between the electric motor 110 and the volute cover 130 to form a rear portion of the spiral seal; Composed of separated, Rotation to rotate the interface unit 120 to a desired angle with respect to the electric motor 110 so that the direction and angle of the inlet 131 and the outlet 132 of the volute cover 130 can be adjusted. Electric water pump having a fastening for mounting. The method according to claim 1, The rotation mounting fastening part The screw hole 123 or bolt penetration for bolt fastening at equal intervals along the circumferential direction to the edge portion 122 of the interface portion 120 to which the motor housing coupling portion 114 of the electric motor 110 is coupled. Electric water pump, characterized in that formed by forming a hole. The method according to claim 1, The rotation mounting fastening part Characterized in that it is formed by forming a bolt hole for screw fastening or through hole for bolt insertion at equal intervals along the circumferential direction of the motor housing rim portion of the electric motor 110 coupled to the fastening portion of the interface unit 120 Electric water pump. The method according to claim 1, The rotation mounting fastening part Bolts fastened to the motor housing coupling part 114 at equal intervals along the circumferential direction to the edge portion 122 of the interface unit 120 to which the motor housing coupling part 114 of the electric motor 110 is coupled. Electric water pump, characterized in that the fixed installation. The method according to claim 1, The rotation mounting fastening part It is configured by fixing the bolts that are fastened to the fastening portion of the interface portion 120 at equal intervals along the circumferential direction of the motor housing rim portion of the electric motor 110 to which the fastening portion of the interface portion 120 is coupled. Electric water pump characterized by.

Images