KR101787702B1 - Triangular rotary pump using roller - Google Patents

Abstract

The present invention relates to a triangular rotary pump using a roller, and more particularly to a triple rotary pump using a roller, which comprises a rotor housing for forming a pumping space formed of an epicyclic locus therein, a rotor having a round triangular shape and eccentrically rotating in a state where three vertexes are in contact with each other in the pumping space And a crankshaft-shaped eccentric drive shaft rotatably coupled to a center of the rotor or a linear drive shaft rotatably coupled to the rotor with an eccentricity, wherein the three corners of the rotor are circular arc-shaped Wherein the groove is formed with at least one hinge guide capable of supporting the support pin while dividing the groove into a plurality of spaces, the roller is rotatably seated in each of the divided grooves, Through the center of the hinge guide .

Description

[0001] The present invention relates to a triangular rotary pump using roller,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a triangular rotary pump, and more particularly, to a triangular rotary pump in which a substantially triangular rotor is pumped while being rotated in a housing having a specific trajectory by reversing the principle of a Brake engine.

Generally, the rotary pump is used for various purposes such as the treatment of dirt and wastewater containing various kinds of sludge as well as drainage in industrial and rural areas for the transportation of highly viscous solids, spraying of orchard pesticides, and supply and discharge of boilers. The rotary pump used for industrial or general purposes has a structure that enables pumping thereof from the operation of gears, vanes, screws, and the like.

However, since the discharge pressure of the conventional rotary pump is limited, the rotor is worn out when the pump is used for a long time or when the pumping pressure is increased, and the pumping efficiency is greatly reduced.

In addition, the above-mentioned pumps are inconvenient for maintenance due to the clogging of the discharge port or the suction port from the sludge or foreign substances contained in the water depending on the use time, and especially to the industrial field in which the high viscosity solid matters are transferred There is a disadvantage that the pumping force is significantly lowered because the discharge port or the inlet port of the pump is blocked due to the solid matter.

In addition, the conventional pump has a considerable weight and complicated structure, which not only increases the pulsation rate from the pumping operation of the pump, but also has considerable difficulty in repairing movement as well as repairing.

To solve this problem, a rotary pump has been disclosed which reverses the principle of a Wankel engine applied to automobiles in recent years.

The rotary pump using the principle of the Wankel engine is equipped with a rotor having an internal space (epicycloid curve) formed like a cocoon and having a triangular shape inside a rotor housing having an external fluid inlet and an outlet, And the external gear which is in contact with the internal gear is rotated by the drive shaft, thereby rotating the rotor eccentrically to suck and discharge the fluid.

FIG. 1 is a perspective view showing a high-pressure positive displacement pump that reverses the principle of the Wankel engine.

Korean Patent No. 10-0381801 (Apr. 14, 2003) discloses that the rotor 80 is incorporated into the pump casing 50 optimally designed through the epicycloid curve and the drive shaft A first rotating body 30 having a predetermined diameter and having an inner folding face portion 30a as an inner circumferential face is fixed to the other end of the rotating shaft 20 by fastening one end of the rotating shaft 20 to the coupling 1, And a second rotating body 60 having an outer folding unit 60a on its outer surface so as to be eccentrically rotated along the inner folding unit during rotation of the first rotating body while being designed to have a small diameter, In the conventional rotary pump structure, the pump casing has an optimal circumferential surface from a double-overlapped circle, and the flow of the fluid through which the suction and discharge are performed through the suction port (50a) and the discharge port (50b) In order to facilitate this, And a rotation pin (30b) is protruded from the center of the first rotating body so as to prevent the externally folded fisher part from being separated from the inner folding fisher part. The center of the second rotating body And a rotating shaft pin is mounted on a surface of the rotating shaft pin. The rotating shaft pin is engaged with the rotating shaft pin. The triangular hole of the rotor is engaged with a triangular hole, And a tension hole (80a) acting as a tension so as to prevent damage to the rotor while maintaining a close contact state of the inner circumferential surface of the casing. "

In the disclosed prior art, a pump having a structure including a casing and a rotor, which are optimally designed through an epicycloid curve, is constituted to increase the volume change while preventing clogging by foreign matter, solids and sludge, , It is possible to design a small pump more easily while providing a high pressure positive displacement pump capable of performing powerful suction and discharge without pulsation. In other words, it is a pump that reverses the principle of Wankel Engine applied to automobile, and suggests high pressure and high output pump by designing casing and rotor of pump through optimal known epicycloid curve.

Fig. 2 shows another kind of rotary piston pump.

According to Korean Patent Registration No. 10-1655160 (Sep. 1, 2016), "a rotor housing 100 in which a housing 110 is formed, respectively, is provided on the lower surface of the rotor housing 100, A first inlet check valve 210 and a second inlet check valve 230 are provided on the upper surface of the rotor housing 100 to be opened only when a static pressure is applied, A first discharge check valve 220 and a second discharge check valve 240. The rotor 300 is installed in the storage portion 110 and divides the storage portion 110 into a plurality of volume variation spaces. And a motor (400) including a drive shaft (410) eccentrically coupled to the first inlet check valve (300), wherein the plurality of volume fluctuation spaces are expanded or compressed by rotation of the rotor (300) 210 and the second inflow check valve 230 are connected to each other in the open state in which the groundwater in the borehole flows into the storage unit 110 The first discharge check valve 220 and the second discharge check valve 240 are closed or the groundwater in the storage part 110 is discharged to the ground connection pipe 50 The rotary piston pump 1000 is known.

In this case, instead of the conventional gear method, the rotor is pumped by eccentrically coupling the rotating shaft. However, since the structure of the rotor is simple and efficient, friction of the triangular rotor's point with the inner surface of the housing is continuously generated, There is a large problem that the pumping fluid leaks.

To solve this problem, there are attempts to attach rollers to the rotor.

3 is a sectional view showing a centrifugal roller pump.

Korean Patent Laid-Open Publication No. 10-2000-0002878 (January 15, 2000) discloses a pump case 1 in which an inlet 20 and a discharge port 10 are formed, a cap 2 covering the pump case, A roller 5 inserted in the groove 4 of the rotor and a bearing 6 mounted on the rotor shaft 15 and a rotor 6 inserted between the rotor shaft 15 and the cap 2, And a gasket 8 which is mounted between the case 1 and the cap 2. The centrifugal roller pump of the present invention is not limited to the centrifugal type.

When the roller is used, there is an advantage of preventing the wear due to the rolling movement along the inside of the case. However, since the roller is not fixed to the groove but is simply inserted, as shown in the figure, there is a problem that the roller is pivotally moved in the groove when the pump is driven. In other words, the surface of the roller may not be uniformly worn, but may be subject to intensive wear at a specific portion.

Such an uneven wear can be extended to a larger problem in which not only the life of the roller is shortened but also the pressure loss of the pump, the leakage of the fluid, and the jamming of the roller occur.

In addition, since the conventional roller is rolled while being inserted into the groove of the rotating rotor, the area of contact between the inner surface of the groove and the roller is inevitably large in order to prevent the roller from detaching. Such a structure has a problem that the abrasion of the roller progresses rapidly because the friction area becomes large.

- Korean Patent No. 10-0196756 (Feb. 22, 1999) "Rotary Pump" - Korean Registered Patent No. 10-1655160 (September 1, 2016) "Rotary piston pump" - Korean Patent No. 10-0381801 (Apr. 14, 2003) "High-pressure positive displacement pump" - Korean Patent Publication No. 10-2000-0002878 (January 15, 2000) "Centrifugal Roller Pump" - Korean Registered Patent No. 10-0180392 (December 1, 1998) "Variable Roller Pump" Korean Patent Publication No. 10-2003-0077767 (Oct. 4, 2003) "Roller Pump"

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a triangular rotary pump using a triangular rotor having a roller attached to three vertexes of the triangular rotary pump, minimizing wear on the inner surface of the rotor housing, And to provide a triangular rotary pump using a roller which is stable in pumping and has excellent durability by preventing uneven wear of the roller during driving.

According to an aspect of the present invention, there is provided a triangular rotary pump using a roller, comprising: a rotor housing defining a pumping space formed by an epicyclic locus therein; a rotor having a triangular shape and having three vertexes in a pumping space And a crankshaft-shaped eccentric drive shaft rotatably coupled to a center of the rotor, wherein the rotor is rotatably supported by the rotor, Wherein at least one of the recesses has an arc-shaped recess formed therein, and the recess has at least one hinge guide capable of supporting the support pin while dividing the recess into a plurality of spaces, the rollers being rotatably seated in the respective recesses, The support pin passes through the center of the rollers, The interference fit characterized in that the coupling.

In this case, the hinge guides are provided to divide the grooves into three grooves, and the three rollers can be seated on the grooves.

And the roller may be a steel material or rubber.

When the diameter of the roller is D, the clearance between the roller and the groove may be 0.005D to 0.02D.

According to the present invention constructed as described above, since the rollers are mounted on the three vertexes of the triangular rotor, when the pump is pumped, the roller moves in a state of being closely attached to the inner surface of the rotor housing, Wear of the housing is greatly reduced, and the rotor does not catch.

Since the roller is centered and supported by the support pin fixed to the hinge guide, it does not fluctuate at the time of rotation, thereby preventing the uneven wear. Therefore, durability is improved.

In addition, due to the minute gap between the roller and the groove, the leakage of the fluid during pumping can be minimized, and stable pumping can be achieved even if there is little abrasion.

In addition, since the roller is supported by the support pin, the area of the roller contacting the groove can be designed to be minimized compared with the conventional one, and the wear of the roller itself is remarkably reduced.

Fig. 1 is a perspective view showing a high-pressure positive displacement pump that reverses the principle of the Wankel engine.
2 is an exploded perspective view showing another kind of rotary piston pump
3 is a cross-sectional view showing a centrifugal roller pump
4 is a cross-sectional view illustrating a triangular rotary pump using a roller according to an embodiment of the present invention;
Fig. 5 is a perspective view showing the shape of the drive shaft shown in Fig.
Fig. 6 is a perspective view showing a rotor equipped with a roller in the present invention shown in Fig.
Fig. 7 is an exploded perspective view of the rotor shown in Fig. 6
Fig. 8 is a cross-sectional view of the AA of the present invention shown in Fig. 4

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

For a better understanding of the present invention, the description with reference to the drawings is not intended to limit the scope of the present invention. In the following description, a detailed description of related arts will be omitted when it is determined that the gist of the present invention may be unnecessarily blurred.

4 is a cross-sectional view illustrating a triangular rotary pump using a roller according to an embodiment of the present invention.

The hinge guide 420, the roller 200, the rotor 200, the drive shaft 300, and the rotor 200, which are provided at three corners of the rotor housing 100, the rotor 200, 430, and a support pin 440.

First, the rotor housing 100 has a pumping space p in which a rotor 200 can be received. The pumping space p has an epicyclic curve e in cross-section. That is, a cocoon cushion shape formed inside the casing of the conventional scooter engine, or a locus of a shape in which two circles are partially overlapped. Thus, the pointed curved portion i formed by superimposing the two circles can be formed.

For reference, the epicycloid curve shows a trajectory in which an arbitrary point is left on the circumference of a rotating circle when a circle having a radius of 1 and a radius of 1 is circled in a circle having a center at the xy rectangular coordinate and a radius of K it means. Various types of epicycloid curves are formed according to the value of K. In the present invention, a curve as shown in the figure can be formed when K is 2.

A suction port 110 through which the fluid is sucked and a discharge port 120 through which the fluid is discharged may be formed at one side of the outer surface of the rotor housing 100. Or a suction port may be formed on one side and a discharge port may be formed on the other side. Alternatively, the suction port and the discharge port may be formed on one side and the discharge port and the suction port may be formed on the other side.

Next, the rotor and the drive shaft will be described with reference to FIG. 5 is a perspective view showing the shape of the drive shaft shown in FIG.

The rotor 200 has a substantially round triangular shape. Specifically, each side of the equilateral triangle can be shaped to bulge outward.

The rotor is housed in the pumping space (p) in the rotor housing (100) and rotated, and the three vertexes are in close contact with each other without being separated from the inner surface of the pumping space (p). That is, as the three vertexes of the rotor 200 move along the epicycloid locus e, the rotor 200 naturally eccentrically rotates.

The driving shaft 300 may be coupled to the rotor 200 to induce eccentric rotation. The driving shaft 300 may be a linear driving shaft 310 or an eccentric driving shaft 320.

5 (a), in order to induce the eccentric rotation of the rotor 200 in the case of the linear driving shaft 310, the linear driving shaft 310 is biased to one side from the center of the rotor 200 and eccentrically penetrates , ≪ / RTI >

When the linear driving shaft 310 is rotated by a motor (not shown), the rotor 200 is eccentric with respect to the rotor 200, so that the rotor 200 receives a force externally and the three vertexes are constrained in the pumping space p So that a rotational force is generated in the rotor 200 to rotate eccentrically.

5 (b), when the driving shaft 300 is the eccentric driving shaft 320, the eccentric driving shaft 320 passes through the center of the rotor 200 and is coupled.

The eccentric drive shaft 320 includes a first eccentric shaft 321 connected to the motor and driven by the motor and a second eccentric shaft 321 inserted into the rotor 200 and shifted from the first eccentric shaft 321 And an eccentric shaft 322. The eccentric shaft 322 has the same shape as the crankshaft and has an eccentricity with respect to each other.

Therefore, when the first eccentric shaft 321 rotates, the second eccentric shaft 322 pushes the rotor 200 outward while revolving around the first eccentric shaft 321, Is rotated eccentrically with the three vertexes confined within the pumping space (p).

The drive shaft 300 and the rotor 200 are subjected to a mutual force when they rotate to generate friction so that a bearing b is interposed between the drive shaft 300 and the rotor 200. Further, a sealing member (not shown) may further be interposed between the rotor 200 and the drive shaft 300 for sealing.

Next, referring to FIGS. 6, 7 and 8, the groove, roller, hinge guide, and support pin according to the technical features of the present invention will be described. Fig. 6 is a perspective view showing a rotor equipped with a roller in the present invention shown in Fig. 4, Fig. 7 is an exploded perspective view of the rotor shown in Fig. 6, and Fig. 8 is a cross- .

The recess 410 is a recess formed inwardly at each vertex of the rotor 200.

In detail, the groove 410 may be continuously formed in the width (thickness) direction of the rotor 200, and the cross section may be circular in shape so that the roller 430 can be seated as shown in FIG.

At this time, the grooves 410 may be formed by cutting each of the vertexes of the rotor 200 so as to be inwardly recessed, or may be manufactured by casting the rotor itself.

The circumferential angle of the groove 410 is greater than 180 degrees so that the roller 430 is not separated from the semicircle so that the roller 430 is not separated. However, in the present invention, the roller 430 is constrained to the support pin 440 The circumferential angle of the groove 410 is not necessarily 180 degrees or more. That is, it may be an arc shape having a circumferential angle of 180 degrees or less.

Thus, the range of the circumferential angle may be approximately 60 ° to 240 °.

The curvature of the groove 410 may be the same as the curvature of the roller 430.

The hinge guide 420 may be in the form of a flat plate, and has the same structure as the partition for partitioning the groove 410 into various spaces.

At least one hinge guide 420 may be provided, and a plurality of hinge guides 420 may be formed along the groove 410. If one hinge guide 420 is provided along the length of the groove 410 to divide the groove 410 into two spaces and if the hinge guide 420 has two hinge guides 420, (410) can be divided into three spaces. It is preferable that at least two hinge guides 420 are provided to divide the groove 410 into three or more spaces.

This is to allow the hinge guide 420 to multiply the support pins 440 in order to prevent the roller 430 from rocking. That is, in order to solve the problem of uneven wear on the rollers due to the absence of a shaft supporting structure like the hinge guide 420 of the present invention, in the present invention, the hinge guide 420 moves the support pin 440 horizontally So that the rotating rollers 430 do not experience uneven wear.

A fitting hole 420a is formed at the center of each hinge guide 420 so that the support pin 440 can be inserted into the fitting hole 420a.

 The upper portion of the hinge guide 420 is triangular in shape like a part of the vertex of the rotor 200 and the support pin 440 is inserted in the center thereof. The fitting hole 420a may be formed.

At this time, the vertexes of the triangular shape on the upper part of the hinge guide 420 maintain a state of being almost in contact with the inner surface of the pumping space p (little clearance).

Meanwhile, the roller 430 is rotatably mounted on each groove 410 defined by the hinge guide 420. For example, if the hinge guides 420 are provided in two, the roller 430 may be provided in three.

A through hole 430a through which the support pin 440 passes may be formed at the center of the roller 430 to allow idling. The material of the roller 430 may be an elastic material such as rubber or the like, which can be closely adhered to the inner surface of the steel or rotor housing, which is assured of wear resistance.

The support pin 440 inserted into the roller 430 penetrates the through hole 430a of the roller 430 and is coupled to the fitting hole 420a of the hinge guide 420 in an interference fit manner. That is, the support pin 440 is fixed to the hinge guide 420 and does not rotate, so that the roller 430 is rotatably supported.

Here, the clearance between the roller 430 and the groove 410 is minimized.

That is, when the rollers 430 are completely in contact with each other, friction occurs between the grooves 410 and the rollers 430 due to rotation of the rollers 430, causing wear. And if they are too far apart, because the pumping fluid leaks through the gap, a range of gaps is needed that minimizes fluid leakage while eliminating friction.

The gap c between the roller 430 and the groove 410 may be in the range of 0.005D to 0.02D.

That is, when the diameter of the roller 430 is D, the clearance c can be about 1/200 to 1/50 of the diameter D. If the clearance is shorter than 1/200 of the diameter D of the roller 430, the leakage of the fluid can be substantially blocked, but the roller may be worn out due to the friction between the roller 430 and the groove 410. If it is longer than 1/50, the abrasion can be completely prevented but the leakage due to the back flow of the fluid at the time of pumping can be increased.

For example, when the diameter of the roller is 10 mm, 0.05 mm <c <0.2 mm. When the diameter of the roller is 100 mm, the design can be made within 0.5 mm <c <2 mm.

In summary, when the rotor eccentrically rotates, the rollers roll because they roll along the inner surface of the rotor housing, and at the same time, they move along the locus of the pumping space and thus revolve. That is, the roller performs pumping while rotating and revolving simultaneously.

As a result, the rollers are moved in a state of being in close contact with the inner surface of the rotor housing, so that the rotation of the rotor is prevented, Because there is not, it can prevent the precession. In addition, a gap is formed between the roller and the groove, thereby minimizing the loss of the fluid and minimizing the uneven wear of the roller.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention may be embodied in many other specific forms without departing from the spirit or essential characteristics thereof. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

100: rotor housing
110: inlet port 120: outlet port
200: Rotor
300: drive shaft
310: linear drive shaft 320: eccentric drive shaft
321: first eccentric shaft 322: second eccentric shaft
410: groove 420: hinge guide
420a: insertion hole 430: roller
430a: Through hole 440: Support pin
p: pumping space e: epicycloid curve (trajectory)
c: Clearance b: Bearing

Claims (4)

A rotor rotatably eccentrically rotatably coupled to the rotor, the rotor housing having a circular triangular shape and having three vertexes in contact with the rotor, A triangular rotary pump including a linear drive shaft or an eccentric drive shaft of a crankshaft shape rotatably coupled to the center of the rotor,
At three vertexes of the rotor, a circular groove having a circumferential angle of 60 ° to 240 ° is formed,
The groove has at least one hinge guide which is formed in a triangular shape like a part of the vertex of the rotor and supports the support pin at the center,
The roller is rotatably seated on each of the divided recesses,
Wherein the support pin passes through a center of the rollers, and is coupled to the hinge guide without interference. The method according to claim 1,
Wherein the hinge guide is divided into three grooves, and three of the rollers are seated on the grooves, respectively. The method according to claim 1,
Wherein the roller is made of steel or rubber. 4. The method according to any one of claims 1 to 3,
And the diameter of the roller is D,
0.005D to 0.02D. &Lt; / RTI &gt;

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