KR102033258B1 - Design method of rotor robe profile with high capacity and performance for internal gear pump and Rotor using the same method - Google Patents

Abstract

The present invention relates to a high capacity high performance rotor type design method for an internal gear pump and a high capacity high performance rotor manufactured according to the design method.
High capacity, high performance rotor type design method for internal gear pump according to the present invention, and the rotor manufactured according to this design method has a radius (rB) of the boundary circle formed by the boundary between the tip height and the tooth root height at the center of the rotor, and the tip tooth type Set the radius (rRec) of the tip cloud circle to generate the, and the radius (rRhc) of the tip cloud circle to create the tooth root tooth, and set the radius of the tip cloud source (rRec) and the outer additional reference radius (rRo). While setting the increase and decrease function (f or fec), while setting the radius (rRhc) of the root grass circle and the increase and decrease function (f or fhc) determined by the inner additional reference radius (rRi), according to the equation The rotor type is designed by defining the tooth curve and the rotor is manufactured accordingly.
According to the high-capacity high-performance rotor-type design method and the rotor manufactured accordingly, the rotor is simplified, the design flexibility is increased, the computational design is easy, and the number of teeth in the rotor of the same size is easily increased, This height is increased by 2 (Rro + Rri) than the cycloid tooth, which has the effect of facilitating the design to further increase the discharge amount, increase the pump efficiency, and further reduce the driving torque and pulsation size.

Description

Design method of rotor robe profile with high capacity and performance for internal gear pump and Rotor using the same method}

The present invention relates to a high-capacity, high-performance rotor-type design method for an internal gear pump and a rotor manufactured according to the design method, and more specifically, to simplify the design using an increase / decrease function, increase the discharge amount, drive torque and pulsation size. The present invention relates to a high-capacity, high-performance rotor-type design method for internal gear pumps that can be reduced, and to a rotor manufactured according to the design method.

Internal gear pumps are used for lubricating automobile engines and oil pumps for automatic transmissions (AT). The oil pump is an essential functional part of the engine. It converts the mechanical energy supplied from the engine into the pressure energy and speed energy of the engine oil to supply lubricating oil to each sliding part inside the engine to prevent abnormal wear and seizure of the parts. It is a part to avoid. The components that make up the oil pump include an electric motor, a key, an inner rotor, an outer rotor, a rotor case, an O-ring and a screw ( Screw).

In addition to other standard products in oil pumps, the rotor case is produced by die casting according to the specifications of the oil pump, and the outer and inner rotors are produced by powder forging.

On the other hand, the internal gear pump and motor having a rotor are composed of an internal rotor and an external rotor, so the structure is simple, and as the precision of processing increases due to the development of manufacturing technology of sintered products, it is easy to process even if the shape is complicated. It is easy and there is little relative movement between two teeth, so the efficiency change is small even after long-term use, and the suction performance is excellent. In addition, it is widely used as a pump that gives suction and resistance to a tandem pump combined with a piston pump, and is especially used as a source of lubricating oil for lubricating engines or as a hydraulic source of an automatic transmission due to less noise than other pumps. . In addition, it has an advantage that the discharge amount per one revolution is larger than the vane or the gear pump compared to the total volume. For this reason, it is widely used in hydraulic systems, and recently, with the development of processing technology, its applicability is gradually expanding.

Among the rotors for pumps employed in this internal gear pump, a combination of an internal rotor and an external rotor with a difference in number of teeth is used. In this type of rotor, the teeth of the rotor are generated using a trocoid curve or a cycloid. Some of the rotor teeth were created from the curves.

The tooth of the cycloid curve is the trajectory of a point on the circumference of the base circle, the outer cloud circle rolling without slipping on the base circle outside the base circle, and the inner cloud circle rolling without sliding on the base circle inside the base circle. The trajectory of a point on the circumference creates the teeth of the inner rotor.

In the internal gear pump employing the teeth of the cycloid curve, the number of teeth of the rotor is determined by the diameter of the base circle and the diameter of the outer cloud source and the inner cloud source which rolls and forms teeth without slipping on the base circle. Also, since the tooth height (or depth) of the rotor is determined by the diameters of the outer cloud source and the inner cloud source, the discharge amount of the pump depends on the diameter of the foundation circle and the cloud source. Therefore, the degree of freedom in setting the tooth height (or depth) or the number of teeth is low, making it difficult to meet the demand for increasing the discharge amount of the pump.

In the internal gear pump, the number of discharges from the pump chamber (pumping chamber) during one rotation of the internal rotor increases as the number of teeth increases, so that the pulsation of the discharge pressure becomes small. However, since the rotor size increases when the number of teeth increases while satisfying the discharge amount, a general internal gear pump increases the number of teeth.

As a result, the rotor is provided with a degree of freedom in setting the tooth height (or depth) of the pump rotor in which the number of teeth is different from the inner rotor and the outer rotor, thereby increasing the pump discharge amount and suppressing the discharge pulsation. It is presented as Korean Patent No. 10-1107907.

Korean Patent No. 10-1107907 (Internal Gear Pump Rotor and Internal Gear Pump Using it)

The object of the present invention is to introduce a sensitization function, which simplifies the design of the internal gear pump rotor, increases the design flexibility, facilitates the increase of the number of teeth in the rotor of the same size, further increases the discharge amount, increases the pump efficiency, and operates. The present invention provides a high capacity, high performance rotor type design method for an internal gear pump that facilitates a design that further reduces torque and pulsation size, and a rotor manufactured according to the design method.

High capacity high performance rotor type design method for an internal gear pump according to the present invention for achieving the above object is to generate a radius (rB) of the boundary circle formed by the boundary line of the tip height and the tooth root height at the center of the rotor, and the tip tooth shape Set the radius of the tip cloud circle (rRec) and the radius of the root grass circle (rRhc) that creates the tooth root tooth,

While setting the increase and decrease function (f or fec) determined by the radius rRec of the tip cloud circle and the outer additional reference radius rRo spaced outward from the radius rB of the boundary circle, Sets the increase and decrease function (f or fhc) determined by the radius rRhc and the inner additional reference radius rRi spaced inward from the radius rB of the boundary circle,

When the boundary point between the tip height and the root height is called PB, the vertex of the tip height is called P1, and the vertex of the root height is called P2, PB through P1 are expressed in accordance with <Equation 1> to <Equation 4>. Tooth curves are determined, and from PB to P2, tooth curves are determined according to Equations 5 to 8.

In addition, the tooth tip on the circumference drawn by the outer base circle radius rBec is called PBec, the vertex of the tip height is called P1, and the tooth root tooth on the circumference drawn by the inner base circle radius rBhc is called PBhc. When the vertex of the root height is called P2, PBec to P1 define the tooth curve according to <Equation 1-1> and <Equation 2> to <Equation 4>, and PBhc to P2 represent <Equation 5 Tooth curves are determined according to -1> and <Equation 6> to <Equation 8>, and PBec to PBhc may be determined as straight or involut tooth curves, polycircle curves or elliptic curves.

The radius of the tip cloud circle (rRec) and the root of the root circle (rRhc) are set differently depending on the number of lobes.

Increment function (f or fec) determined by the radius of the tip cloud circle (rRec) and the outer additional reference radius (rRo), and increase or decrease determined by the radius of the root tree (rRhc) and the inner additional reference radius (rRi). The functions f or fhc may be the same as or different from each other.

According to the high capacity, high performance rotor type design method for an internal gear pump, a rotor type is designed and a rotor is manufactured.

According to the high capacity and high performance rotor type design method for an internal gear pump according to the present invention, and the rotor manufactured according to the design method, the rotor can be easily designed, the design flexibility can be increased, and the computer design can be facilitated.

In addition, the number of teeth (lobe number) is easily increased in the same size rotor, and the tooth height is increased by 2 (Rro + Rri) than the cycloid teeth, further increasing the discharge amount, increasing the pump efficiency, and driving torque and pulsation size. There is an effect of facilitating a reducing design.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining a high capacity high performance rotor type design method for an internal gear pump according to a first embodiment of the present invention.
FIG. 2 is a graph illustrating a touch type designed according to the design method of FIG. 1.
3 is a view for explaining a high capacity high performance rotor touch design method for an internal gear pump according to a second embodiment of the present invention.
FIG. 4 is a graph illustrating a touch type designed according to the design method of FIG. 3.
5 is a view for explaining a high capacity high performance rotatable type design method for an internal gear pump according to a third embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this case, the same components in the accompanying drawings are to be noted that the same symbols as possible. In addition, detailed descriptions of well-known functions and configurations that may blur the gist of the present invention will be omitted. For the same reason, in the accompanying drawings, some components are exaggerated, omitted or schematically illustrated.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view for explaining a high capacity high performance rotor type design method for an internal gear pump according to a first embodiment of the present invention. FIG. 1 is a diagram showing one lobe tooth shape generated based on a boundary circle B, a cloud circle Rec and Rhc, and a base circle Bec and Bhc in an x-y coordinate system.

In order to design a high-capacity, high-performance rotary touch type pump for an internal gear pump according to an embodiment of the present invention, first, the boundary circle B and the rolling circle Rec, Rhc are set.

The boundary circle B is a circle formed by the boundary line between the tip height of the lobe and the tooth root height in the center O of the rotor, and rB represents the radius of the boundary circle B. The cloud circle is divided into a tip cloud source (Rec) that generates a tip tooth, and a root root cloud (Rhc) that generates a tooth root tooth.

rRec represents the radius of the tip cloud circle (Rec), rRhc represents the radius of the root cloud circle (Rhc). The radius rRec of the tip cloud circle and the radius rRhc of the root cloud circle are set differently according to the number of lobes.

Next, while setting the increase and decrease function f determined by the radius rRec of the tip cloud circle and the outer additional reference radius rRo spaced outward from the radius rB of the boundary circle, The increase and decrease function f determined by the radius rRhc of the circle and the inner additional reference radius rRi spaced inward from the radius rB of the boundary circle is set.

The base circle has an outer base circle (Bec) increased by an outer additional reference radius (rRo) spaced outward from the radius (rB) of the boundary circle, and an inner additional base spaced inward from the radius (rB) of the boundary circle. It is divided into the inner foundation circle Bhc reduced by the radius rRi.

rBec represents the radius of the outer base circle Bec, and rBhc represents the radius of the inner base circle Bhc.

The increase and decrease function (f) is determined by the radius of the tip cloud circle (rRec) and the outer additional reference radius (rRo), and the increase and decrease function is determined by the radius (rRhc) and the inside additional reference radius (rRi) of the root grass circle ( f) may mutually be same or different. In other words, it is determined by the outer increase / decrease function (fec) determined by the radius of the tip cloud circle (rRec) and the outer additional reference radius (rRo), and by the radius of the root tree (rRhc) and the inner additional reference radius (rRi). The losing median function (fhc) is basically different but may be the same. The increase and decrease functions fec and fhc can be determined by constants or variables.

In addition, the outer additional reference radius (rRo) and the inner additional reference radius (rRi) are shown as two, respectively, as shown in the drawings, the two rRo may be different or the same, and two rRi also It may be different or the same.

In the first embodiment, the tip height is 2 (rRec + rRo) and the root height is 2 (rRhc + rRi). Therefore, the radius of the outermost tooth (end) is rB + 2 (rRec + rRo), and the innermost tooth of the outer tooth is rB-2 (rRhc + rRi). Accordingly, the outer increase / decrease function (fec), which is determined by the radius of the tip cloud circle (rRec) and the outer additional reference radius (rRo), is the radius of the outermost tooth (end) of rB + 2 (rRec + rRo). The inner increase / decrease function (fhc), which is determined by the radius of the root roots (rRhc) and the inner additional reference radius (rRi), is equal to the radius of the innermost tooth (rRhc + rRi). To be determined).

Next, the lobe teeth are determined according to the equation for each section, and the boundary point between the tip height and the root height is called PB, the vertex of the tip height is called P1, and the vertex of the root height is P2. In this case, PB to P1 determine the tooth curve according to <Equation 1> to <Equation 4>, and PB to P2 determine the tooth curve according to <Equation 5> to <Equation 8>.

)을 나타내는 <수학식 1>은 다음과 같이 표시된다.Tooth curve from PB to P1 (

) Is expressed as follows.

[Equation 1]

는 <수학식 2>로 표시된다. 여기서, f는 바깥쪽 증감함수(fec)를 나타낸다.In Equation 1, the increase rate of f is (2 rRo + 2 rRec) / (rRo + 2 rRec),

Is represented by <Equation 2>. Here, f represents the outer increase and decrease function fec.

[Equation 2]

는 [수학식 3]으로 표시되고,

는 [수학식 4]로 표시된다.In Equation 2,

Is represented by [Equation 3],

Is represented by [Equation 4].

[Equation 3]

[Equation 4]

In <Equation 3> and <Equation 4>, θ is

의 범위이다.

Range.

)을 나타내는 <수학식 5>는 다음과 같이 표시된다.And the tooth curve from PB to P2 (

<Equation 5>, which is expressed as follows, is expressed as follows.

[Equation 5]

는 <수학식 6>으로 표시된다. 여기서, f는 안쪽 증감함수(fhc)를 나타낸다.In Equation 5, the increase rate of f is (2 rRi + 2 rRhc) / (rRi + 2 rRhc),

Is represented by Equation 6. Here, f represents the inner increase / decrease function (fhc).

[Equation 6]

는 [수학식 7]으로 표시되고,

는 [수학식 8]로 표시된다.In Equation 6,

Is represented by [Equation 7],

Is represented by [Equation 8].

[Equation 7]

[Equation 8]

In <Equation 7> and <Equation 8>, θ is

의 범위이고,

Is the range of,

)를 감안한

는Number of lobes (

)

Is

로 정해진다.

It is decided.

FIG. 2 shows a rotor type designed according to the design method described in accordance with FIG. 1, with the number of lobes (Zi) 6, the boundary circle radius (rB) 50 mm, the outer additional reference radius (rRo) and the inner additional reference radius ( rRi) is a touch type designed with 10mm each and the radius of the rolling circle rRec 6mm. The rotor is manufactured by this touch type.

3 is a view for explaining a high capacity high performance rotor touch design method for an internal gear pump according to a second embodiment of the present invention.

In the second embodiment, a lobe tooth shape is determined according to a mathematical formula for each section, and the peripheral tooth radius point drawn by the outer base circle radius rBec is called PBec, and the vertex of the tooth height is P1. When the tooth root point of the circumference drawn by the inner base circle radius (rBhc) is called PBhc, and the vertex of the tooth root height is called P2, PBec to P1 are represented by Equations 1-1 and <Equation 1>. 2> to the tooth curve according to <Equation 4>, the tooth curves from PBhc to P2 to the tooth curve according to <Equation 5-1> and <Equation 6> to <Equation 8>, the straight line from PBec to PBhc Set it as a tooth type. The remaining design method is the same as in the first embodiment.

)을 나타내는 <수학식 11>은 다음과 같이 표시된다.Tooth curve from PBec to P1 (

) Is expressed as follows.

[Equation 1-1]

는 <수학식 2>로 표시되며,

는

이다. 여기서, f는 바깥쪽 증감함수(fec)를 나타낸다.In Equation 1-1, the increase rate of f is (2 rRec + rRo) / (2 rRec),

Is represented by <Equation 2>,

Is

to be. Here, f represents the outer increase and decrease function fec.

[Equation 2]

는 [수학식 3]으로 표시되고,

는 [수학식 4]로 표시된다.In Equation 2,

Is represented by [Equation 3],

Is represented by [Equation 4].

[Equation 3]

[Equation 4]

In <Equation 3> and <Equation 4>, θ is

의 범위이다.

Range.

)을 나타내는 <수학식 15>은 다음과 같이 표시된다.And, the tooth curve from PBhc to P2 (

<Equation 15>, which is expressed as follows, is expressed as follows.

[Equation 5-1]

는 <수학식 6>으로 표시되며,

는

이다. 여기서, f는 안쪽 증감함수(fhc)를 나타낸다.In Equation 5-1, the increase rate of f is (2 rRhc + rRi) / (2 rRhc),

Is represented by <Equation 6>,

Is

to be. Here, f represents the inner increase / decrease function (fhc).

[Equation 6]

는 [수학식 7]으로 표시되고,

는 [수학식 8]로 표시된다.In Equation 6,

Is represented by [Equation 7],

Is represented by [Equation 8].

[Equation 7]

[Equation 8]

In <Equation 7> and <Equation 8>, θ is

의 범위이고,

Is the range of,

)를 감안한

는Number of lobes (

)

Is

로 정해진다.

It is decided.

FIG. 4 shows a rotor type designed according to the design method described in accordance with FIG. 3, with the number of lobes (Zi) 6, the boundary circle radius (rB) 50 mm, the outer additional reference radius (rRo) and the inner additional reference radius ( rRi) is a touch type designed with 10mm each and the radius of the rolling circle rRec 6mm. The rotor is manufactured by this touch type.

5 is a view for explaining a high capacity high performance rotatable type design method for an internal gear pump according to a third embodiment of the present invention.

FIG. 5 is a third embodiment of the present invention, which is a variation of the second embodiment, wherein the teeth of the lobe are determined according to the equations for each section, and the end of the circumference drawn by the outer base circle radius rBec is shown. The tooth point is called PBec, the vertex of the tip height is called P1, the circumferential tooth root point drawn by the inner base circle radius (rBhc) is called PBhc, and the vertex of the root height is called P2. To P1, the tooth curve is determined according to <Equation 1-1> and <Equation 2> to <Equation 4>, and from PBhc to P2, <Equation 5-1> and <Equation 6> to <Equation 8 The tooth curve is determined according to the>, and from PBec to PBhc, the tooth curve can be made. An involut tooth curve is formed by the trajectory that the end draws when pulling the end of the line wound on the base circle. The remaining design method of the third embodiment and the touch type designed according to this design method are the same as in the second embodiment, and thus detailed description thereof will be omitted.

In the third embodiment, PBec to PBhc may be formed of various tooth curves, such as polycircle curves or elliptic curves, in addition to involute tooth curves.

On the other hand, the embodiments of the present invention disclosed in the specification and drawings are merely presented specific examples to easily explain the technical contents of the present invention and help the understanding of the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention can be carried out in addition to the embodiments disclosed herein.

B: boundary circle rB: radius of boundary circle
Rec: The End of the Cloud Rhc: The Root of the Cloud
rRec: Radius of the end of the rolling circle rRhc: Radius of the root of the rolling circle
rRo: Outside additional reference radius rRi: Inside additional reference radius
Bec: outer foundation circle Bhc: inner foundation circle
rBec: Outer base circle radius rBhc: Inner base circle radius
PB: boundary point between tip height and tooth root height
P1: Vertex of tooth tip height P2: Vertex of tooth root height
PBec: Tooth point on the circumference drawn by the outer base circle radius
PBhc: tooth root tooth on circumference drawn by inner base circle radius
f: increase / decrease function fec: outer increase / decrease function
fhc: inside increase / decrease function

Claims (12)

Radius of the boundary circle formed by the boundary between the tip height and the tooth root height at the center of the rotor (rB), the radius of the tip cloud circle creating the tip tooth (rRec), and the radius of the tooth root cloud source creating the tooth root tooth set (rRhc),
While setting the increase and decrease function f or fec determined by the radius rRec of the tip cloud circle and the outer additional reference radius rRo spaced outward from the radius rB of the boundary circle, Setting an increase and decrease function (f or fhc) determined by a radius rRhc of the rolling circle and an inner additional reference radius rRi spaced inwardly from the radius rB of the boundary circle,
When the boundary point between the tip height and the tooth root height is PB, the vertex of the tip height is called P1, and the vertex of the tooth root height is P2, from PB to P1, the equations (1) to < A tooth curve curve is determined according to Equation 4, and the tooth curve is defined according to Equations 5 to 8 from PB to P2.
[Equation 1]

[Equation 2]

[Equation 3]

[Equation 4]

In <Equation 3> and <Equation 4>, θ is

Is in the range of.
[Equation 5]

[Equation 6]

[Equation 7]

[Equation 8]

In <Equation 7> and <Equation 8>, θ is

Range. The method of claim 1,
In Formula 1, the increase rate of f is set to (2 rRo + 2 rRec) / (rRo + 2 rRec),
The increase rate of f in Equation (5) is (2 rRi + 2 rRhc) / (rRi + 2 rRhc), characterized in that the high capacity high performance rotor type design method for an internal gear pump. Radius of the boundary circle formed by the boundary between the tip height and the tooth root height at the center of the rotor (rB), the radius of the tip cloud circle creating the tip tooth (rRec), and the radius of the tooth root cloud source creating the tooth root tooth set (rRhc),
While setting the increase and decrease function f or fec determined by the radius rRec of the tip cloud circle and the outer additional reference radius rRo spaced outward from the radius rB of the boundary circle, Setting an increase and decrease function (f or fhc) determined by a radius rRhc of the rolling circle and an inner additional reference radius rRi spaced inwardly from the radius rB of the boundary circle,
The circumferential tooth tip drawn by the outer base circle radius (rBec) is called PBec, the vertex of the tooth tip height is called P1, and the circumferential tooth root tooth drawn by the inner base circle radius (rBhc) is called PBhc. When the vertex of the root height is P2, PBec to P1 determine the tooth curve according to <Equation 1-1> and <Equation 2> to <Equation 4>, and the PBhc to the A high capacity, high performance rotor type design method for an internal gear pump, characterized in that the tooth curve is determined according to <Equation 5-1> and <Equation 6> to <Equation 8> up to P2.
[Equation 1-1]

[Equation 2]

[Equation 3]

[Equation 4]

In <Equation 3> and <Equation 4>, θ is

Is in the range of.
[Equation 5-1]

[Equation 6]

[Equation 7]

[Equation 8]

In <Equation 7> and <Equation 8>, θ is

Is in the range of. The method of claim 3,
The high-capacity, high-performance rotor-type design method for an internal gear pump according to claim 1, wherein the PBec to the PBhc are defined by a straight tooth, an involut tooth curve, a poly circle curve, or an elliptic curve. The method of claim 3,
In Equation 1-1, the increase rate of f is set to (2 rRec + rRo) / (2 rRec),
The increase rate of f in <Equation 5-1> is (2 rRhc + rRi) / (2 rRhc), characterized in that the high capacity high performance rotor touch type design method for an internal gear pump. The method according to any one of claims 1 to 5,
The radius of the end of the rolling circle (rRec) and the radius of the root of the root (rRhc) is set according to the number of lobes, characterized in that the high capacity high performance rotor touch type design method for an internal gear pump. The method of claim 6,
Radius of the roots of the cloud

)silver
The number of lobes

)

A high capacity, high performance, touch-type design method for an internal gear pump, characterized in that determined by. The method according to any one of claims 1 to 5,
The increase / decrease function (f or fec) determined by the radius of the tip cloud circle (rRec) and the outer additional reference radius (rRo), the radius of the root grass circle (rRhc) and the inner additional reference radius (rRi) A high-capacity, high-performance, touch-type design method for an internal gear pump, characterized in that the increase and decrease functions (f or fhc) determined by the same. The method according to any one of claims 1 to 5,
The increase / decrease function (f or fec) determined by the radius of the tip cloud circle (rRec) and the outer additional reference radius (rRo), the radius of the root grass circle (rRhc) and the inner additional reference radius (rRi) A high-capacity, high-performance, touch-type design method for an internal gear pump, characterized in that the increase / decrease function (f or fhc) is determined different from each other. Radius of the boundary circle formed by the boundary between the tip height and the tooth root height at the center of the rotor (rB), the radius of the tip cloud circle creating the tip tooth (rRec), and the radius of the tooth root cloud source creating the tooth root tooth (rRhc) is set,
The increase / decrease function f or fec determined by the radius rRec of the tip cloud circle and the outer additional reference radius rRo spaced outward from the radius rB of the boundary circle is set, The increase / decrease function (f or fhc) determined by the radius rRhc of the rolling circle and the inner additional reference radius rRi spaced inward from the radius rB of the boundary circle is set,
When the boundary point between the tip height and the tooth root height is PB, the vertex of the tip height is called P1, and the vertex of the tooth root height is P2, from PB to P1, the equations (1) to < A tooth curve is determined according to Equation 4, and the PB to P2 are designed and manufactured according to a design method in which the tooth curve is determined according to Equation 5 to Equation 8. High capacity, high performance rotor for fish pumps.
[Equation 1]

[Equation 2]

[Equation 3]

[Equation 4]

In <Equation 3> and <Equation 4>, θ is

Is in the range of.
[Equation 5]

[Equation 6]

[Equation 7]

[Equation 8]

In <Equation 7> and <Equation 8>, θ is

Is in the range of. Radius of the boundary circle formed by the boundary between the tip height and the tooth root height at the center of the rotor (rB), the radius of the tip cloud circle creating the tip tooth (rRec), and the radius of the tooth root cloud source creating the tooth root tooth (rRhc) is set,
The increase / decrease function f or fec determined by the radius rRec of the tip cloud circle and the outer additional reference radius rRo spaced outward from the radius rB of the boundary circle is set, The increase / decrease function (f or fhc) determined by the radius rRhc of the rolling circle and the inner additional reference radius rRi spaced inward from the radius rB of the boundary circle is set,
The circumferential tooth tip drawn by the outer base circle radius (rBec) is called PBec, the vertex of the tooth tip height is called P1, and the circumferential tooth root tooth drawn by the inner base circle radius (rBhc) is called PBhc. When the vertex of the root height is P2, the tooth curve is determined according to Equation 1-1 and Equation 2 to Equation 4 from PBec to P1, and from PBhc. The high-capacity high performance rotor for an internal gear pump according to Equation 5-1 and Equation 6 to Equation 8 is designed and manufactured according to a design method in which tooth curves are determined.
[Equation 1-1]

[Equation 2]

[Equation 3]

[Equation 4]

In <Equation 3> and <Equation 4>, θ is

Range.
[Equation 5-1]

[Equation 6]

[Equation 7]

[Equation 8]

In <Equation 7> and <Equation 8>, θ is

Range. The method of claim 11,
The high-capacity high performance rotor for an internal gear pump, characterized in that the PBec to the PBhc is designed and manufactured according to a design method comprising a straight tooth, an involute tooth curve, a poly circle curve, or an elliptic curve.

Images