KR20020026104A - Impeller for high pressure pump - Google Patents

Abstract

PURPOSE: An impeller for high pressure pump is provided to reduce manufacturing cost thereof by manufacturing a blade part thereof by injection molding. CONSTITUTION: A blade part(19) of an impeller(16), with exception of a rotating friction surface, a body part(18) of the impeller, frictionally contacting with a discharge case and a front cover facing the discharge case, is formed by insert injection molding. Accumulation and adherence of calcified substance formed by residue and rising temperature of rinsing water is prevented thereby. An air vent(20) is formed on the rotating friction surface to prevent overload on a motor driving part on initial driving of the impeller by removing surface tension occurring on the rotating friction surface.

Description

Impeller for high pressure pump

The present invention relates to an impeller for a high pressure pump that rotates at a high speed (about 3000 rpm) to discharge a high temperature (say about 80 ° C to 90 ° C) section water interlocked when the motor is driven to flow into the discharge case.

In more detail, the impeller wing is molded by injection molding to prevent the scale of calcification material, residues, etc. from sticking, and the impeller in friction contact with the discharge case and the front cover. It relates to an impeller for forming a high pressure pump to prevent the overload occurs in the motor drive during the initial drive by forming an air vent (rotating friction surface) of the.

1 is a schematic view of a state in which the cap and the discharge case separated from the high pressure pump according to the prior art.

As shown, a motor (M) consisting of a stator wound around the coil and integrally fixed to the housing 1, and a rotor installed inside the stator to be rotatable when power is applied to the coil, and the motor. (M) A cooling fan (3) for cooling by discharging external air, which is attached to the motor shaft at the rear and sucked during rotation, to the radiating fin (2) protruding radially on the outer periphery of the housing (1), and forwards the motor (M). Impeller (7) mounted on the motor shaft for discharging rinsing water (for example, rinsing, etc.), etc. introduced through the inlet (5) formed in the discharge case (4) during high speed rotation through the discharge port (6) It will be provided.

Accordingly, the heat dissipation fins 2 formed on the outer periphery of the housing 1 are cooled by the discharge of external air sucked into the cap 8 when the cooling fan 3 interlocked when the motor M is driven. It is possible to indirectly cool the motor drive unit built in (1), and at the same time to cool the condenser accommodated in the condenser casing 9 mounted on the outer periphery of the housing 1.

However, as the individual unit blades 7a forming the impeller 7 described above are manufactured by machining, the working time is increased and the manufacturing cost is greatly increased, thereby losing the price competitiveness of the product. .

In addition, since the impeller 7 and the discharge case 4 are formed of a brass material having strong durability and corrosion resistance to rinsing water, etc., the weight and the cost cost are increased.

In addition, when the pump is used for a long time, scales such as residues contained in rinsing water, calcium (Ca) and magnesium (Mg) dissolved in high temperature rinsing water are calcified and accumulated in the unit blades 7a of the impeller 7. Stock solution such as rinse or the like is insoluble as much as the height of the unit blade 7a due to the cavitation phenomenon formed in the unit blade 7a when the impeller 7 is fastened or rotated at high speed. If the cumulative, it is necessary to remove these fixtures for smooth pumping by the impeller (7) will have a problem that the after-care is required.

In addition, when the residue or calcified material is fixed to the friction surface of the impeller 7 in friction contact with the discharge case 4 and the front cover 10, respectively, due to the surface tension during the initial driving of the impeller 7 Interfering with the rotation is the overload occurs in the motor drive has a problem of shortening the service life of the component.

Therefore, the object of the present invention is to reduce the weight and cost cost by injection molding the wing parts, except the rotational friction portion of the impeller, easy to manufacture by injection molding to significantly reduce the production cost due to the reduction of labor costs It is to provide an impeller for a pump.

Another object of the present invention, by forming an air vent on the rotating friction surface of the impeller for the discharge case and the front cover to remove the surface tension of the impeller to prevent the overload occurs in the motor drive during the initial drive of the impeller It is to provide an impeller for a high pressure pump.

Another object of the present invention is to remove the residues of the rinsing water, the calcified material formed due to the temperature rise of the rinsing water, etc. accumulated by the rise of the temperature of the rinsing water by injection molding the blade of the impeller as a synthetic resin to remove them It is to provide an impeller for a high pressure pump that is not necessary to follow up.

1 is a schematic view of a state in which the cap and the discharge case separated from the high pressure pump according to the prior art,

2 is a perspective view of an impeller for a high pressure pump according to the present invention;

3 is a perspective view of an impeller for a high pressure pump according to another embodiment of the present invention,

Figure 4 is an exploded perspective view of a high pressure pump mounted with an impeller according to the present invention.

* Explanation of symbols used in the main part of the drawing

11; housing

12; motor

13; Motor back cover

14; Cooling fan

15; Discharge case

16; Impeller

17; Front cover

18; Body

19; Wing

20; Air vent

21,22; Irregularities

The object of the present invention described above, the coil is wound around the stator is fixed to the housing and the motor is made of a rotor which is installed inside the stator rotatably when the power is applied, and the outside air is mounted to the rear of the motor and sucked when driving the motor passes through A motor back cover, a cooling fan that cools the heat dissipation fins and coils formed in the housing as external air that is mounted to the motor shaft outside the motor back cover and passes through the motor back cover when rotating, and is mounted on the motor shaft to the discharge case when rotating. An impeller for a high pressure pump having an impeller for discharging incoming rinsing water, wherein a wing portion excluding a rotating friction surface of the impeller in friction contact with the discharge case and the front cover opposite thereto is used to increase the temperature of the residue and the rinsing water of the rinsing water. Insert injection molding to prevent the calcification material formed due to accumulation and sticking A high pressure pump in which the impeller is achieved by providing.

According to a preferred embodiment, the air vent is formed on the rotational friction surface to remove the surface tension generated on the rotational friction surface of the impeller as described above to prevent the overload generated in the motor drive unit during the initial driving of the impeller.

According to a preferred embodiment, the air vent described above is formed radially or radially on the impeller.

According to a preferred embodiment, at least one or more concavities and convexities are coupled to the body so that the wing portion of the impeller described above may prevent walking due to a different temperature expansion coefficient with respect to the body of the rotating friction surface during high speed rotation of the impeller.

According to a preferred embodiment, the annular projection is formed in the wing portion so as to correspond to the groove formed in the annular shape on the outer periphery of the body so as to prevent the wing portion of the impeller described above is separated from the body.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which are intended to be described in detail to be easily carried out by those skilled in the art to which the present invention pertains, and thus the present invention It does not mean that the technical scope of the is limited.

As shown in Figure 2 to 4, the coil is wound on the outer surface of the motor 12 consisting of a stator fixed integrally to the housing 11 and a rotor installed inside the stator rotatably when the power is applied to the coil And a motor back cover 13 mounted to the motor shaft 12a to the rear of the motor 12 so as to pass outside air sucked when the motor 12 is driven, and the motor shaft 12a to the outside of the motor back cover 13. Is mounted on the motor shaft 12a and the cooling fan 14 to cool the heat dissipation fin 25 formed in the housing and the coil wound on the stator as external air passing through the motor back cover 13 when rotating. It is applied to the high pressure pump impeller having an impeller 16 for discharging the rinsing water flowing into the discharge case 15 at a high pressure.

Therefore, according to a preferred embodiment of the present invention, the wing portion excluding the rotational friction surface that is the portion of the body 18 of the impeller 16 in friction contact with the discharge case 15 and the front cover 17 facing the above ( 19) Insert injection molding is performed to prevent accumulation of residues of rinsing water and calcification material formed due to the temperature rise of the rinsing water.

At this time, preferably, the air vent 20 impeller 16 to remove the surface tension generated on the rotating friction surface of the impeller 16 to prevent the overload occurs in the motor drive during the initial driving of the impeller 16 It is formed radially or radially on the rotational friction surface of.

Also, the body 18 may prevent the above-described wing 19 of the impeller 16 from walking with different temperature expansion coefficients with respect to the body 18 during high-speed rotation of the impeller 16. And at least one or more places are coupled by the uneven parts 21 and 22.

In addition, preferably, the wing 19 of the impeller 16 described above is coupled to correspond to the groove 23 formed in an annular shape on the outer periphery of the body 18 so as to prevent the wing 19 from being separated from the body 18. An annular projection 24 is formed in the wing 19 so as to.

Hereinafter, a method of using the impeller for a high pressure pump according to the present invention will be described with reference to the accompanying drawings.

As shown in Figure 4, when the power is applied to the coil wound on the outer surface of the stator constituting the motor 12 built in the dishwasher, the rotor is rotated by the mutual magnetic field generated between the stator and the rotor Accordingly, the impeller 16 and the cooling fan 14 mounted at the front and rear of the rotating shaft 12a of the motor 12 are simultaneously rotated at a predetermined speed.

As the above-described cooling fan 14 rotates, the external air sucked through the cap 24 surrounding the cooling fan 14 passes through the cooling fan 14 in which the unit blades are spirally formed, and is located behind the housing 11. As it passes through the fixed motor back cover 13, the radiating fin 25 radially formed in the housing 11 and the coil wound around the stator of the motor 12 may be discharged, thereby cooling them.

On the other hand, due to the high-speed rotation of the impeller 16 mounted on the motor shaft 12a toward the front of the motor 12 described above, the rinsing water introduced through the inlet 26 of the discharge case 15 is discharged to the outlet 27. It can be discharged at a high pressure through.

At this time, the wing 19 except for the body 18 of the impeller 16 in friction contact with the discharge case 15 and the front cover 17 is reduced by weight as the insert injection molding as a synthetic resin, reducing the cost I can alleviate it.

In addition, the foreign matter contained in the rinsing water flowing into the discharge case 15 described above, calcium, magnesium, etc. generated by the temperature rise of the rinsing water is calcified and accumulated and fixed on the wing 19 of the impeller 16. As it is prevented, the after-care work to remove them is unnecessary.

In addition, as the air vent 20 is radially or radially formed on the rotational friction surface of the body 18 of the impeller 16, the surface tension on the rotational friction surface of the impeller 16 is removed, so that the impeller ( In the initial driving of 16, overloading of the driving part of the motor 12 is prevented to extend the service life of the corresponding part.

As mentioned above, according to a preferable embodiment, it has the following advantages.

First, the injection molding of the wing parts excluding the rotational friction part of the impeller reduces the weight and the cost cost, and it is easy to manufacture by injection molding, which can greatly reduce the manufacturing cost due to the reduction of the labor time.

Second, by forming an air vent on the rotating friction surface of the impeller for the discharge case and the front cover to remove the surface tension of the impeller it is possible to prevent the overload occurs in the motor drive during the initial drive of the impeller.

Third, the injection molding of the impeller wing as a synthetic resin prevents the residue of the rinsing water and the calcification material formed due to the temperature rise of the rinsing water to accumulate and accumulate on the wing area, thereby eliminating the need for post management. will be.

Claims (5)

A motor consisting of a stator in which a coil is wound and fixed to a housing, and a rotor installed inside the stator so as to be rotatable when power is applied, a motor back cover through which external air is mounted at the rear of the motor and sucked when driving the motor, and a motor back Cooling fan that cools the radiating fins and coils formed in the housing as external air that is mounted on the motor shaft and passes through the motor back cover when rotating, and an impeller mounted on the motor shaft to discharge the rinsing water flowing into the discharge case during rotation. In the high pressure pump impeller having: Insert injection to prevent the accumulation of calcified material formed due to the temperature rise of the rinsing water residues and rinsing water, except for the wing friction portion of the discharge case and the impeller in friction contact with the front cover facing the discharge High pressure pump impeller characterized in that it is molded. The method of claim 1, wherein the air vent is formed on the rotating friction surface to remove the surface tension generated on the rotating friction surface of the impeller to prevent the overload occurs in the motor drive during the initial driving of the impeller. High pressure pump impeller. The impeller of claim 2, wherein the air vent is radially or radially formed in the impeller. According to any one of claims 1 to 3, wherein the wing of the impeller is at least one body and at least one or more so as to prevent the temperature expansion coefficient different from walking with respect to the body of the rotating friction surface during high speed rotation of the impeller Impeller for high pressure pump, characterized in that the uneven coupling. The annular protrusion according to any one of claims 1 to 3, wherein the annular protrusion is coupled to the wing portion so as to correspond to the groove formed in an annular shape on the outer periphery of the body so as to prevent the wing portion of the impeller from being separated from the body. Impeller for high pressure pump, characterized in that formed.