KR101893847B1 - Waterpump - Google Patents

Abstract

According to the present invention, there is provided a driving apparatus comprising: a driving shaft which is rotated by receiving an external driving force; An impeller connected to the drive shaft and rotating; A main frame having a housing space in which the impeller is accommodated, a suction pipe communicated with one side of the main frame and sucking fluid into the housing space, and a suction pipe extending from the suction pipe, And a cover frame including partition walls disposed on one side between the impellers.
According to the water pump of the present invention, foreign matter can be prevented from entering the upper end of the impeller by adding a partition wall between the main frame and the impeller. Further, according to the water pump according to the present invention, foreign matter can be smoothly discharged from the water pump by inclining the outer end of the impeller base.

Description

Water pump {Waterpump}

The present invention relates to a water pump, and more particularly, to a water pump that sucks cooling water to cause cooling water to circulate inside an engine, and a water pump used in a cooling system of a vehicle.

A water pump means a pump that forcibly circulates cooling water to the inside of the engine, and a product that cools electrical components inside the vehicle. Generally, an engine, such as an automobile engine, that obtains power by using the explosive power of a fuel generates heat at a high temperature during operation. Failure to properly control this will adversely affect the engine itself as well as other adjacent engines. Therefore, cooling water is essentially used as means for cooling the above-mentioned heat.

Generally, the water pump of the internal combustion engine is forcibly driven by the belt connected to the crankshaft of the engine to rotate the impeller inside the pump.

In the case of eco-friendly vehicles such as electric vehicles, hybrids, plug-in hybrids, and fuel cells, cooling water (water) pumps are installed for cooling of inverters, HSGs and stacks.

Such a coolant pump is usually configured to be driven in conjunction with an engine or to be driven by itself in a separate power supply.

The rotating impeller sucks the cooling water to the center and applies a centrifugal force to the sucked cooling water so that the cooling water can circulate inside the engine.

The cooling water flowing into the water pump often contains a small amount of foreign matter. When such foreign matter enters the water pump, the water pump driving can be stopped. As a result, the cooling water circulation can not be performed, and the engine and the inverter can be seriously damaged due to overheating.

Japanese Patent Registration No. 10-1635538 has been proposed to reduce the influence of the foreign object on the water pump. Referring to FIG. 1, Japanese Patent No. 10-1635538 relates to a foreign substance removing device for a pump capable of discharging foreign matter sandwiched between an impeller 1 and a casing 2, more specifically, And a scraper ring 3 for slidably moving the impeller 1 and the casing 2 by sliding in the direction of the axis of the impeller 1 and scraping the foreign matter introduced into the gap between the impeller 1 and the casing 2.

At this time, according to Japanese Patent Application No. 10-1635538, foreign matter can not be prevented from flowing between the upper end portion of the impeller and the upper end frame of the water pump. In other words, although the foreign matter once introduced can be easily removed, the inflow of the foreign matter can not be fundamentally prevented.

In addition, Japanese Patent Registration No. 10-1635538 does not disclose any method for preventing foreign matter introduced into the impeller from flowing into the interior of the water pump. In other words, there are many additional equipment such as bearings and room units between the rotating shaft and the water pump frame, and it is not possible to prevent foreign matter from entering the equipment.

Accordingly, there is a need for a water pump having a separate structure for minimizing the inflow of foreign matter contained in the cooling water into the interior of the water pump.

It is an object of the present invention to provide a water pump having a structure that minimizes the inflow of foreign matter between a water pump impeller and a main frame. Another object of the present invention is to provide a water pump having a structure for easily discharging foreign matter introduced into the impeller.

According to the present invention, there is provided a driving apparatus comprising: a driving shaft which is rotated by receiving an external driving force; An impeller connected to the drive shaft and rotating; A main frame having a housing space in which the impeller is accommodated, a suction pipe communicating with one side of the main frame and sucking fluid into the housing space, and a suction pipe extending from the suction pipe, And a cover frame including partition walls disposed on one side between the impellers.

The impeller includes a disk-shaped base having the drive shaft connected to the center thereof; A plurality of blades coupled to an upper surface of the base and extending radially from a center of the base; A disk-shaped shroud coupled to an upper end of the blade; And an inlet pipe formed to communicate with one side of the shroud and allowing the fluid to flow into the impeller, and the partition wall may be extended to the inside of the inlet pipe.

The cover frame may include a pair of protruding pieces each protruding into the main frame and disposed on an outer circumferential surface of the shroud and the base and forming a discharge port through which the fluid introduced into the impeller is discharged have.

The base may have an outer end formed to be inclined to guide the fluid to the center of the discharge port.

According to the water pump of the present invention, foreign matter can be prevented from flowing between the impeller and the main frame by adding a partition wall between the main frame and the impeller. In addition, according to the water pump of the present invention, the outer end of the impeller base is formed to be inclined so that the flow path can be formed so that the foreign matter can be smoothly discharged from the water pump.

1 is a cross-sectional view showing a conventional water pump.
2 is a cross-sectional view of a water pump according to an embodiment of the present invention.
FIG. 3A is a cross-sectional view illustrating movement of cooling water and foreign matter introduced into a conventional water pump, and FIG. 3B is a cross-sectional view illustrating movement of cooling water and foreign matter introduced into a water pump according to an embodiment of the present invention.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Therefore, the true scope of the present invention should be determined by the technical idea of the appended claims.

Although the water pump according to the embodiment of the present invention is installed inside the automobile and sucks the cooling water circulated to the inside of the automobile engine and the inverter, it is only one embodiment, and the rotational force of the impeller It is needless to say that the structure of the water pump according to the present invention can be applied to all pumps having a structure of sucking and discharging fluid. Therefore, even if it is described by using the words "cooling water" and "water pump", it will be understood that it is preferable to interpret all the fluids including the cooling water and all kinds of pumps including the water pump.

Referring to FIG. 2, a water pump 100 according to an embodiment of the present invention includes a drive shaft 110, an impeller 120, and a cover frame 130.

The driving shaft 110 receives external driving force and rotates. Although not shown separately, the external driving force may be transmitted to the driving shaft 110 by a separately provided driving motor, or may be transmitted to the driving shaft 110 by being forcedly driven by a belt connected to the crankshaft of the engine.

The impeller 120 is connected to the drive shaft 110 and rotates. More specifically, the impeller 120 includes a disk-shaped base 121 having the driving shaft 110 connected to the center thereof, a disk-shaped base 121 coupled to the upper surface of the base 121, Shaped shroud 123 coupled to the upper end of the blade 122 and a plurality of blades 122 extending from the center of the shroud 123 so as to communicate with one side of the shroud 123, And an inflow pipe 124 protruding upward to communicate with the suction pipe 132 and allowing the fluid to flow into the impeller.

The cover frame 130 includes a main frame 131 having an accommodation space 131a in which the impeller 120 is accommodated and a main frame 131 connected to one side of the main frame 131, A suction pipe 132 protruded upward from a central portion of the main frame 131 to receive fluid into the accommodation space 131a and a suction pipe 132 extending from the suction pipe 132 and extending between the main frame 131 and the impeller 120 And a barrier rib 133 disposed on one side of the barrier rib 133.

At this time, the partition wall 133 may extend toward the inside of the inflow pipe 124. More specifically, the partition 133 protrudes from the suction pipe 132 toward the base 121 so as to be parallel to the suction pipe 132, and is spaced a predetermined distance inward from the inlet pipe 124 . The inlet pipe 124 and the partition wall 133 form a double wall to prevent foreign matter from flowing into the space formed between the shroud 123 and the upper portion of the main frame 131. [

The cover frame 130 protrudes into the main frame 131 and is disposed on an outer circumferential surface of the shroud 123 and the base 121. The fluid flowing into the impeller 100 And may include a pair of projecting pieces 134 forming discharge ports 134a to be discharged. The pair of protruding pieces 134 protrude from the main frame 131 so that the end portions of the protruding pieces 134 are opposed to each other. The protruding pieces 134 protrude from the main frame 131, Are disposed outside the base 121, respectively.

The discharge port 134a is connected to the water pump 100 so that the cooling water flowing into the impeller 120 and receiving the rotational force from the blade 122 and flowing out of the impeller 120 flows into the engine and the inverter. And the cooling water is discharged from the outlet. The transfer of the cooling water from the discharge port 134a to the engine or the like can be designed in various ways, which are well known in the art and will not be described in detail.

The outer end of the base 121 may be inclined so as to guide the fluid to the center of the discharge port 134a. More specifically, the base 121 may be formed in such a shape that an outer end thereof is bent toward the shroud 123 as the impeller 120 is oriented in a direction in which the fluid is discharged. This is to prevent foreign matter from flowing into the lower end of the base 121.

Preferably, the outer end of the base 121 is curved upward so that the velocity vector of the cooling water exiting the impeller 120 is directed to the upper end. Accordingly, the foreign matter can be discharged to the discharging portion 134a without flowing into the lower end portion of the base 121. [ However, this is merely an embodiment of the present invention, and the shape of the base 121 for guiding the fluid to the center of the discharge port 134a may be formed in various shapes according to the designer's choice.

The water pump 100 according to an embodiment of the present invention may further include a shaft frame 140, an actual unit 150, and a bearing 160. [

The shaft frame 140 has an upper end coupled to the cover frame 130 and receives the drive shaft 110, the room unit 150, and the bearing 160 therein.

The seal unit 150 is a mechanical element for preventing the cooling water from flowing into the shaft frame 140. 2, the seal unit 150 is directly coupled to the drive shaft 110, but this is merely an example. The seal unit 150 may have a structure such that the inner side thereof rotates like a bearing and the outer side surface of the seal unit 150 is fixed to an external object. Alternatively, a separate bearing may be coupled to the shaft, 150).

The bearing 160 has an inner surface coupled to the drive shaft 110 and an outer surface coupled to the shaft frame 140 to support the drive shaft 110. The bearing is a mechanical element that holds the rotating shaft in a fixed position and rotates the shaft while supporting the self weight of the shaft and the load applied to the shaft. Although a ball bearing is shown in Fig. 2, this is merely an embodiment, and various types of bearings can be used.

3A and 3B, the features of the present invention can be clearly understood. 3 (a) and 3 (b) illustrate the movement paths of cooling water and foreign matter flowing into the water pump 100 according to an embodiment of the present invention . Referring to FIG. 3A, in the conventional water pump, there is no partition, and no inclination is formed at the outer end of the impeller base, so that foreign matter permeates between the water pump impeller and the main frame. 3B, the water pump 100 according to an embodiment of the present invention includes a partition 133 and a slope is formed at an outer end of the impeller base 121, And is directly discharged to the discharge port 134a without penetrating between the main frame 120 and the main frame 131. [ Accordingly, the cooling water can be smoothly circulated by the engine, the inverter, or the like while preventing the water pump 100 from being damaged by the foreign matter.

100: water pump 110: drive shaft
120: impeller 121: base
122: Blade 123: Shroud
124: inlet pipe 130: cover frame
131: main frame 132: suction pipe
133: partition wall 134:

Claims (4)

A drive shaft which rotates by receiving an external drive force;
An impeller connected to the drive shaft and rotating; And
A suction pipe protruding upward from a central portion of the main frame and sucking a fluid into the accommodation space; and a suction pipe extending from the suction pipe, And a cover frame including a partition disposed on one side between the impellers,
The impeller includes a base to which the drive shaft is connected, a shroud disposed on the upper side of the base, and an inlet pipe protruded upward from the center of the shroud and communicating with the suction pipe to introduce fluid into the base,
Wherein the partition wall is formed to protrude from the suction pipe toward the base side so as to be parallel to the suction pipe and is spaced apart from the inlet pipe by a predetermined distance,
Wherein the cover frame is formed so as to protrude inwardly from the main frame so that end portions thereof face each other, and a pair of protruding pieces respectively disposed on outer sides of the shroud and the base with respect to a direction in which the impeller discharges the fluid ≪ / RTI &
Wherein the base has a shape such that an outer end thereof is bent toward the shroud as the impeller is directed toward a direction in which the fluid is discharged. delete delete delete

Images