KR20020094276A - Impeller of water pump having variable vane - Google Patents

Abstract

PURPOSE: A water pump impeller with variable vane is provided to achieve improved cooling efficiency by automatically controlling a coolant pumping amount, while improving durability of engine and fuel efficiency. CONSTITUTION: A water pump impeller(30) comprises an impeller body(31) having a plurality of guide holes(32) formed in a radial direction at a disk, a protruded hole(33) for insertion of a driving shaft(80), a space formed by expanding the portion where the protruded hole and the disk are interconnected, and a stopper arranged within the space so as to control rotation angle of a vane; a plurality of variable vanes(40) formed into streamline so as to apply pressure to the coolant by the rotation of the impeller body, wherein each variable vane has an end hinge-coupled to the impeller body through a pin(41) and the other end having a protruded guide rotating along a guide hole; a vane control plate having a hole formed in a radial direction and a stopper for controlling rotation angle, which is attached to the rear side of the impeller body; and an expansion unit accommodated in the space of the impeller body, which expands/contracts by the temperature of the coolant so as to thereby apply force to the stopper of the vane control plate and rotate the vane control plate.

Description

Impeller of water pump having variable vane

The present invention relates to an impeller of a water pump in which a variable vane is formed, and more particularly, to an impeller of a water pump in which a variable vane is formed so that the angle of the vane formed in the impeller of the water pump is automatically adjusted according to the temperature of the cooling water. will be.

In general, an engine obtains power by burning fuel, and the temperature of the combustion gas combusted in the combustion chamber reaches 2000 ° C or higher, but not all of the heat of combustion is converted into power, and a considerable amount of heat is transferred to the cylinder head and the piston. Absorbed, causing heat loss and overheating of these parts.

As a result, excessively high temperatures, such as cylinders, may cause deformation of the cylinder or damage of the oil film on the cylinder wall, resulting in poor lubrication, and severe damage to the engine and worsening of combustion, resulting in knocking and premature ignition. The output will be drastically reduced.

As a result, the engine is cooled to prevent overheating of the engine. On the contrary, if the engine is too cooled, the heat generated by combustion cannot be converted into power, and the amount of loss due to cooling is increased, thereby lowering thermal efficiency and increasing fuel consumption. Insufficient fuel atomization is supplied to the engine, which dilutes the engine oil by gasoline to promote cylinder wear.

For this reason, a cooling system is applied to the engine to cool the engine to prevent overheating and to keep the temperature at a constant temperature. As shown in FIG. 10, a water jacket 1 surrounding the cylinder and the combustion chamber and water is circulated to the cylinder. The water-cooled chiller (4) includes a water pump (10) to cool, a radiator (2) for cooling the engine by transferring heat of the coolant whose temperature has risen to the outside, and a cooling fan (3) for ventilation of the radiator. It is used.

The water-cooled cooling device (4) is provided with a device for changing the flow of cooling water in accordance with the temperature of the cooling water, called the thermostat (5). By allowing the engine to circulate again through the bypass pipe (6), the temperature of the engine is quickly raised to the normal temperature. When the engine reaches the normal temperature, the thermostat (5) follows the cooling water temperature to prevent the engine from overheating. Since the cooling water is circulated to the radiator 2 to be opened, the heat dissipation is cooled, and the engine is circulated to maintain the temperature.

Water pump 10 for forced circulation of the cooling water is composed of a pump housing 11, an impeller 12, a rotating shaft 13, a bearing 14, a pulley 15 and the like.

In addition, the side of the impeller 12 is formed with a vane 16 for forced circulation of the cooling water, the vane 16 is formed so that the cooling water circulates while causing the vortex while rotating the impeller 12 is formed. .

However, in the water pump configured as described above, since the vane is fixedly formed on the impeller, the pumping amount increases according to the rotation speed of the pump. Therefore, the pumping amount is not sufficient in the low rotation region, the pumping amount is unnecessary in the high rotation region, there is a waste of power, there is a risk of cavitation, there is a problem that unnecessarily overflow the flow rate even in a low water temperature conditions. In addition, there was a problem that the flow rate of the cooling water was insufficient at high water temperature and low rotational speed conditions.

Therefore, in order to solve the above problems, a water pump in which the operating angle of the vane is changed in accordance with the rotation speed of the engine has recently been applied.

In the water pump equipped with the variable vane, as shown in FIG. 12, a plurality of variable vanes 22 are formed at one side of the impeller 21 by centrifugal force, and one side of the variable vanes 22 is a pin. It is hinged by (23), the guide 24 is protruded to the other side is fitted into the guide ball 25 of the impeller 21. And a return spring (not shown) is mounted on the back of the variable vane 22. Therefore, when the engine rotates at a high speed, the variable vane 22 is opened to the outside by the force to be pushed out while the coolant hits the variable vanes 22 with the force to be pushed outward by the centrifugal force. And when the engine is low rotation, the variable vane 22 is returned to its original position by the return spring, so that the pumping amount of the coolant is elastically determined in proportion to the rotational speed of the engine.

However, in the case of the water pump to which the variable vane is applied, the operating angle of the vane is controlled only by the centrifugal force and the water pressure of the engine, so that the flow rate is designed to be discharged regardless of the coolant temperature of the engine. there was.

Therefore, the present invention has been made to solve the above problems, and more specifically, the angle of the vane formed in the impeller of the water pump impeller of the water pump having a variable vane is formed to automatically adjust according to the temperature of the cooling water The purpose is to provide.

The present invention as a means for achieving the above object,

In the water pump mounted on one side of the cylinder block receives the driving force of the engine to the drive shaft, the impeller is rotated in accordance with the rotation of the drive shaft is pumped coolant for cooling the engine,

A plurality of guide balls are formed radially on a circular plate, and shaft holes protrudingly formed on one side of the center of the disc are formed on the driving shaft, and a space having a predetermined size is formed by expanding the periphery where the shaft balls and the disc are connected in a naval shape. An impeller body formed with a fixed stopper for controlling a rotation angle of the vane inside the space;

It is formed in a streamline to apply pressure to the coolant by the rotation of the impeller body, one side is hinged to the impeller body as a pin, the other side is formed so that the protruding guide is rotated along the guide ball is operated by the vane control panel A plurality of variable vanes whose angles are changed;

In order to uniformly operate the plurality of variable vanes, a guide ball and an oblique operating hole formed in the impeller body are radially formed, and a front stopper is provided with a movable stopper for controlling a rotation angle, and a rear side of the impeller body. A vane control panel attached to the vane;

An expansion unit which is accommodated in the space of the impeller body and expands and contracts according to the temperature of the coolant to apply a force to the movable stopper of the vane control panel to rotate the vane control panel;

A return spring for expanding the expansion unit by the cooling water temperature to rotate the variable vane and then lowering the cooling water temperature so that the variable vane is returned to its original position when the expansion unit contracts; Characterized in that consists of.

1 is a perspective view of a portion of the water pump impeller formed by the present invention.

Figure 2 is a rear perspective view of the water pump impeller formed by the present invention.

Figure 3 is a perspective view of the impeller body according to the present invention.

Figure 4 is a rear perspective view of the impeller body according to the present invention.

5 is a perspective view of the vane control panel according to the present invention.

6 is a cross-sectional view of the impeller formed by the present invention.

Figure 7 is an operating state when the cooling water temperature is high in the operating state of the impeller formed by the present invention.

8 is an operating state when the cooling water temperature is low in the operating state of the impeller formed by the present invention.

9 is a cross-sectional view of the space part.

10 shows a cooling system of a typical engine.

11 and 12 are views for explaining the conventional technology.

※ Explanation of code for main part of drawing

30: impeller 31: impeller body

32: guide ball 33: shaft ball

34: space 35: fixed stopper

40: variable lane 41: pin

42: Guide 50: Vane Control Panel

51: operator 53: movable stopper

60: extension unit 70: return spring

80: drive shaft 90: shroud

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

1 is a perspective view of a portion of the water pump impeller formed by the present invention, Figure 2 is a rear perspective view of the water pump impeller formed by the present invention, Figure 3 is a perspective view of the impeller body according to the present invention, Figure 4 Is a rear perspective view of the impeller body according to the present invention, Figure 5 is a perspective view of the vane control panel according to the present invention, Figure 6 is a cross-sectional view of the impeller formed by the present invention, Figure 7 is an operating state of the impeller formed by the present invention Fig. 8 is a view showing an operating state when the coolant temperature is low in the operating state of the impeller formed by the present invention, and Fig. 9 is a cross-sectional view of the space part.

Reference numeral 30 indicated in the drawing indicates an impeller of a water pump formed by the present invention, and reference numeral 31 indicates an impeller body formed by the present invention.

The impeller 30 formed by the present invention and mounted on the water pump of the engine includes an impeller body 31, a variable vane 40, a vane control panel 50, an expansion unit 60, a return spring 70, and a driving shaft ( 80).

The impeller body 31 has a plurality of guide holes (32) for guiding the operation of the variable vanes (40) in a circular plate radially, the shaft hole for the drive shaft (80) to be axially supported on one side thereof ( 33) protrude. In addition, the periphery where the shaft hole 33 and the disc is connected is extended to a naval shape to form a space 34 of a predetermined size. A fixed stopper 35 for controlling the angle of rotation of the vane is formed at one side of the space 34.

And the variable vane 40 is formed in a streamline so that the pressure is applied to the cooling water by the rotation of the impeller body 31, one side is hinged to the impeller body 31 by a pin 41, The guide 42 protruding to the other side is formed to rotate along the guide ball 32. In addition, the guide 42 penetrates through the guide hole 32 and is fitted into the operating hole 51 of the vane control panel 50.

The vane control panel 50 is intended to operate the plurality of variable vanes 40 described above uniformly, the operating hole 51 formed obliquely with the guide ball 32 formed in the impeller body 31 is A radially formed pinwheel shape. In particular, a coupling portion 52 for receiving the small diameter portion 81 of the drive shaft 80 is formed on the front side of the vane control panel 50, when the vane control panel 50 is coupled to the drive shaft 80 The small diameter portion 81 is accommodated in the hole of the coupling portion 52, and is fixed by a separate bolt 82 on the outside of the vane control panel 50. In addition, a movable stopper 53 for controlling the angle of rotation of the vane control panel 50 is formed on one side of the coupling portion 52.

In addition, the expansion unit 60 is filled in the space 34 of the impeller body 31 (the space from the fixed stopper to the movable stopper), and the expansion unit 60 is made of a material that expands and contracts according to the cooling water temperature. Is formed. The expansion unit 60 is intended to rotate the vane control panel 50 by rotating the movable stopper 53 by a predetermined angle when the temperature of the cooling water is heated above a predetermined temperature.

In addition, a return spring 70 is formed inside the vane control panel 50. The return spring 70 has the vane control panel 50 when the cooling water temperature is lowered and the expansion unit 60 is contracted. ) Is to be returned to its original position. In particular, the return spring 70 is formed in an annular coil shape, one end of which is fitted to the fixed stopper 35 and the other end is fitted to the movable stopper 53 as shown in FIG.

A circular shroud 90 is formed to cover the front side of the variable vane 40, and the pins 41 of the variable vane 40 are fitted to the outer circumferential side of the shroud 90. Lose.

Referring to the embodiments of the present invention formed as described above in detail with the accompanying drawings as follows.

When the engine is running, a water pump for circulating coolant is started. That is, the driving force of the engine is transmitted to the drive shaft to rotate the impeller 30.

At this time, the expansion unit 60 expands and contracts according to the temperature of the coolant cooling the engine.

That is, when the temperature of the cooling water for cooling the engine is heated above a predetermined temperature, the expansion unit 60 formed in the space 34 is expanded to push the movable stopper 53. When the movable stopper 53 rotates in a predetermined direction, the vane control panel 50 integrally formed therewith is rotated. As the vane control panel 50 is rotated, the pin 41 of the guide 40 slides toward the center of the drive shaft 80 by riding the guide hole 32 and the operation hole 51. ) Becomes larger. In this case, the plurality of variable vanes 40 are uniformly rotated by the vane control panel 50. Therefore, the impeller 30 has a variable inclined vane 40 sliding toward one end toward the center of the drive shaft 80 as shown in FIG.

When the temperature of the coolant that cools the engine is lower than a predetermined temperature, such as at low speed or at the start of the start, the expansion unit 60 is contracted. At this time, the return spring 70 is formed inside the vane control panel 50. The vane control panel 50 is returned to its original position. Therefore, the impeller 30 is pumped with a small amount of coolant as the variable vane 40 is changed to a small inclination angle as shown in FIG.

Therefore, the water pump equipped with the impeller 30 according to the present invention changes the pumping amount according to the change in the cooling water temperature, thereby making the cooling more efficient.

When the impeller configured as described above is applied to the water pump of the engine, the inclination angle of the vane is changed according to the coolant temperature, and the pumping amount of the coolant is automatically adjusted to improve the cooling efficiency, as well as to improve the thermal durability of the engine. In addition, the unnecessary pumping power of the water pump is saved, thereby improving fuel economy.

Claims (3)

In the water pump mounted on one side of the cylinder block receives the driving force of the engine to the drive shaft, the impeller is rotated in accordance with the rotation of the drive shaft is pumped coolant for cooling the engine, A plurality of guide balls 32 are formed radially on a circular plate, and a shaft hole 33 for protruding from the driving shaft 80 is protruded to one side of the center of the disc, and the periphery to which the shaft hole 33 and the disc are connected is formed. An impeller body 31 extending in the shape of a nail to form a space 34 having a predetermined size, and having a fixed stopper 35 for controlling the angle of rotation of the vane inside the space 34; Is formed in a streamline to apply pressure to the cooling water by the rotation of the impeller body 31, one side is hinged to the impeller body 31 by the pin 41, the guide 42 protruding to the other side is the guide A plurality of variable vanes 40 which are formed to rotate along the ball 32 and whose operating angle is changed by a vane control panel; The operating holes 51 are radially formed at an oblique angle with the guide ball 32 formed in the impeller body 31 so that the operation of the plurality of variable vanes 40 is uniform, and rotates toward the front side thereof. A vane control panel (50) formed with a movable stopper (53) for controlling the angle and attached to the rear side of the impeller body (31); The vane control panel 50 is rotated by applying a force to the movable stopper 53 of the vane control panel 50 while being accommodated in the space 34 of the impeller body 31 and expanding and contracting according to the temperature of the cooling water. Expansion unit (60); Impeller of the water pump formed variable vane, characterized in that consisting of. The method of claim 1, One side of the vane control panel 50 protrudes to form a coupling portion 52 for accommodating the small diameter portion 81 of the drive shaft 80 so that the vane control panel 50 is coupled to the outside of the vane control panel 50. Impeller of a water pump formed variable vane, characterized in that the additional bolt 82 is filled in. The method of claim 1, When the expansion unit 60 is expanded by the cooling water temperature and the variable vanes 40 are rotated, and the cooling water temperature is lowered and the expansion unit 60 is contracted, the variable vanes 40 are returned to their original positions. Impeller of a water pump with a variable vane, characterized in that the return spring (70) is formed in the space (34).