JPH02283888A - Fluid rotary machine - Google Patents

Abstract

PURPOSE:To provide a compressor which is simple in structure and reduced in size by a method wherein a rotor in a circle in cross section is rotatably contained in an eccentric position in a circular case, and a blade having two ends making slide contact with the inner wall surface of the circular case is slidably engaged with a slide groove formed in the rotor and extending through the center thereof. CONSTITUTION:A suction port 2 and a delivery port 3 are formed in an inner wall surface 1A of a circular case 1 having an inner periphery being round, and a rotor 4 is rotatably contained inside the circular case 1 and eccentrically to a case center C1. A slide groove 5 is formed in the rotor 4 in a manner to extend through a center C2 of the rotor and a blade 6 is reciprocatively engaged therewith. The blade 6 is formed such that resilient substances 8 and 8, e.g. soft plastic, are joined with both ends of one plate, and the resilient substance 8 is brought into slide contact with the inner wall surface 1A of the case 1. Through rotational drive of the rotor 4, a space on the suction port 2 side is gradually expanded to suck fluid therein, and meanwhile a space on the delivery port 3 side is gradually contracted to deliver the fluid.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fluid rotary machine such as a pump or compressor with an improved blade structure.

(Prior art) The structure of a conventional oil pump is as shown in Fig. 8 and Fig. 9, for example.
As shown in the figure, the inner wall surface IA of a circular case l whose inner periphery is a perfect circle.
A suction port 2 and a discharge port 3 are formed inside the circular case 1, and a rotor 4 is mounted eccentrically from the center of the case.

A slide groove 5 is formed inside the rotor 4 passing through its center, and two blades 6A and 6B are fitted therein so as to be able to reciprocate.

As shown in FIG. 8, the blades 6A and 6B are made of, for example, carbon and are formed into a U-shape.

A spring 7 is inserted into the center of one of the blades 6A to push the blades 6A and 6B apart in opposite directions so as to come into sliding contact with the inner wall surface LA of the case 1.

In the oil pump of this structure, when the rotor 4 rotates in the direction of the arrow, one of the blades 6A is compressed by the inner wall surface IA of the case 1, and the space on the side of the discharge port 3 is gradually compressed, and the oil inside this is released from the discharge port. Pushed out from 3.

On the other hand, the blades 6B on the opposite side extend outward from the rotor 4, and the space on the side of the suction port 2 gradually expands and becomes a negative pressure state, so that oil is sucked into the space through the suction port 2. It has become.

However, in the conventional blades 6A and 6B, the pair of opposing blades have separate structures, and the spring 7 is interposed between them, so the strength is weak and the structure is complicated, making it impossible to miniaturize.

Moreover, when the rotation becomes high speed, one blade 6A, 6B
The movement of the machine does not follow suit, causing flapping and increasing noise.

In addition, since the blades 6A and 6B move in and out due to the elastic force of the spring 7, they have poor adhesion to the inner wall surface IA of the case 1. could not.

(Problems to be Solved by the Invention) The present invention was devised in view of the above points. The present invention provides a fluid rotary machine that can be widely applied as a rotation unit such as a compression pump, a vacuum pump, or a robot joint.

(c) Means for Solving Problems) The present invention provides a method in which a rotor is mounted eccentrically from the center of the case inside a circular case provided with a suction port and a discharge port, and
A slide groove passing through the center is formed inside the rotor, and a blade is integrally formed in the slide groove and extends out and out facing the outer periphery of the rotor, and portions of both ends of the blade make sliding contact with the inner wall surface of the case. The first gist is that an elastic body is provided in the structure.

Further, in the present invention, the inner wall surface on one side of the circular case of the fluid rotating machine that does not pass through the center of the rotor is formed into a half of a perfect circle, and the inner wall surface on the opposite side passes from the inner wall surface of the perfect circle through the center of the rotor. , is formed at a distance of the same length as the diameter of the perfect circle.

(Function) Next, to explain the function of the present invention, a rotor is installed inside a circular case eccentrically from the center of the case, and a slide groove is formed inside the rotor passing through the center. A fluid rotary machine has integrally formed blades that appear and retract from the outer periphery of the rotor, and has elastic bodies on the parts of both ends of the blades that make sliding contact with the inner wall surface of the case.When the rotor rotates, the rotor moves away from the center of the case. Since the blade is eccentrically provided, the distance between the opposing surfaces of the inner wall surfaces on which both ends of the blade slide is shorter than the diameter of the case.

At this time, elastic bodies are attached to both ends of the blade, so when the rotor rotates, the elastic body attached to one end of the blade is compressed by the inner wall of the case, gradually compressing the space on the discharge port side. The fluid inside is forced out from the discharge port.

The elastic bodies attached to the ends of the blades on the opposite side elastically return to the outside of the rotor, and the space on the suction port side gradually expands and becomes a negative pressure state, causing fluid to flow from the suction port into the space. It's like it's being sucked inside.

Moreover, the inner wall surface on one side of the circular case of the fluid rotary machine that does not pass through the center of the rotor, which is the second gist of the present invention, is formed into a half of a perfect circle, and the inner wall surface on the opposite side is the inner wall surface of the perfect circle. A fluid rotating machine is formed at a distance from the inner wall surface of a perfect circle to the center of the rotor, and the distance is the same as the diameter of the perfect circle. Since the blades are formed at a distance of about 300 mm, when a blade having the same length as the diameter rotates, both ends of the blade rotate while constantly sliding against the inner wall surface of the case.

Therefore, in this structure, the blades protruding from the outside of the rotor are integrally formed, and both ends of the blades are
Since it rotates while constantly sliding against the inner wall of the case, it can compress high pressures and can be used as a self-priming liquid pump or compressor.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

1 and 2 show an embodiment of the present invention,
A suction port 2 and a discharge port 3 are formed on the inner wall surface IA of a circular case 1 whose inner periphery is a perfect circle, and a case center C is formed inside the circular case l.
The rotor 4 is mounted eccentrically from I.

A slide groove 5 is formed inside the rotor 4 passing through its center C3, and a blade 6 is fitted therein so as to be able to reciprocate.

As shown in FIG. 2, this blade 6 has elastic bodies 8.8, such as soft plastic, bonded to both ends of a single plate, so as to be in sliding contact with the inner wall surface LA of the case l.

In this structure, when the rotor 4 rotates, since the rotor 4 is provided eccentrically from the center C1 of the case 1, when the rotor 4 rotates from the state shown in FIG. The distance between opposing points of the inner wall surface IA that slide into contact is shorter than the diameter of the case l.

At this time, elastic bodies 8.8 are attached to both ends of the blade 6, so when the rotor 4 rotates in the direction of the arrow, the elastic body 8 attached to one end of the blade 6 is compressed by the inner wall surface lA of the case l. The space in the discharge port 3 is gradually compressed, and the oil inside this space is forced out from the discharge port 3.

On the other hand, the elastic body 8 attached to the end of the blade 6 on the opposite side of 1 elastically returns to the outside of the rotor 4.
Since the space on the second side gradually expands and becomes a negative pressure state, oil is sucked into the space through the suction port 2.

Therefore, in the above structure, since the blades 6 protruding outward from the rotor 4 are integrally formed, the structure is simple, has high strength, and can downsize the device.

In addition, since the blade 6 has an integral structure, it operates smoothly even at high speeds with low noise.Furthermore, since the inner wall LA of the case and the blade 6 are in close contact with each other via the elastic body 8, high pressure compression is possible, and gas and liquid can be compressed. Can be used as a pump.

3 and 4 show another embodiment of the present invention, in which a suction port 2 and a discharge port 3 are formed in a circular case 1, and a rotor is mounted eccentrically from the case center CI inside the circular case 1. 4 is installed.

A slide groove 5 is formed inside the rotor 4 passing through its center C8, and a blade 6 that protrudes and retracts from the outer periphery of the rotor 4 is fitted therein so as to be able to reciprocate.

In the circular case 1, the inner wall surface IA of the part (toward) that does not pass through the center C1 of the rotor 4 is formed in half of a perfect circle, and the inner wall surface IB on the opposite side is formed from the inner wall surface IA of the perfect circle to the inner wall surface IA of the rotor 4. It is formed at a distance that passes through the center C2 and has the same length as the diameter of the perfect circle.

Further, the length of the blade 6 is formed to be the same length as the diameter of the perfect circle.

In the above structure, the inner wall surface IB passes through the center C of the rotor 4 from the inner wall surface IA of the perfect circle, and is formed at a distance equal to the diameter of the perfect circle, so that the blade 6 of length L is formed. When it rotates, both ends thereof are constantly in sliding contact with the inner wall surfaces IA and 1B of the case.

Therefore, in the above structure, the blades 6 protruding outward from the rotor 4 are integrally formed, and both ends of the blades 6 rotate while constantly sliding against the inner wall surfaces IA and IB of the case, so that high pressure compression is possible. Can be used as a suction type liquid pump or compressor.

5 to 7 show other different embodiments of the present invention.

As shown in FIG. 7, in the circular case 1, one inner wall surface IA that does not pass through the center C2 of the rotor 4 is formed in half of a perfect circle with a diameter that passes through the case center C6, and the inner wall surface IB on the opposite side is from the perfect circular inner wall surface IA to the center C of the rotor 4
1, and is formed at a distance having the same length as the diameter of the perfect circle. In other words, the inner wall surface IB on the opposite side is parallel to the perfect circle shown by the imaginary line in the range from center C1 to center C2, and the middle part of the inner wall surface 1B through which the perfect circle shown by the imaginary line passes. It has a shape that bulges outward.

Two slides 5.5 are formed perpendicularly to this rotor 4, and two blades 6.5 are mounted perpendicularly thereto.

These two blades 6.6 are formed with an upward groove 9 on one side and a downward groove 9 on the other, and the grooves 9, 9 intersect and fit together, allowing them to reciprocate back and forth. It is supposed to be done.

In the above embodiment, one or two blades 6 are attached, but three or more blades 6 may be attached.

Furthermore, if the suction port 2 and the discharge port 3 are formed symmetrically with respect to a line passing through the center C1 and the center C2, a rotating machine that can rotate in the left and right directions can be obtained.

Although the above explanation deals with self-priming liquid pumps and compressors capable of high-pressure compression, it can also be applied to vacuum pumps and rotary units such as the joints of fluid-driven robots. can.

(Effects of the Invention) As explained above (according to the fluid rotating machine according to the present invention),
Since the blades that retract and retract from the outer circumference of the rotor are integrally formed, the strength of the blades is high (the structure is simple and can be made compact, and the rotation is smooth and high pressure compression can be achieved).

In addition, if the circular case is formed so that both ends of the blade rotate and are always in sliding contact with the inner wall surface of the case, even higher pressure compression can be performed.

[Brief explanation of drawings]

11 and 2 show an embodiment of the present invention,
1 is a cross-sectional plan view of a fluid rotary machine, FIG. 2 is a vertical cross-sectional front view of FIG. 1, FIG. 3 is a cross-sectional plan view of a fluid rotary machine according to another embodiment of the present invention, and FIG. 5 is a perspective view showing the main parts of a fluid rotating machine according to another embodiment of the present invention, FIG. 6 is a longitudinal sectional front view of FIG. 5, and FIG. 7 is a longitudinal sectional view of FIG. FIG. 8 is a cross-sectional plan view showing a conventional oil pump, and FIG. 9 is a vertical cross-sectional front view of FIG. 8. l...Case LA, lB...-Inner wall surface 2...Suction port 3...Discharge port 4...Rotor
5...Slide full 6...Blade
7...Spring 8...Elastic body 9...
・Concave groove WI 1 Figure 2 Figure % Figure Figure Figure Figure Figure Figure

Claims (2)

[Claims] 1. A rotor is mounted eccentrically from the center of the case inside a circular case with a suction port and a discharge port, and a slide groove is formed inside the rotor to pass through the center.
A fluid rotary machine characterized in that a blade is integrally formed in the slide groove and protrudes and retracts from the outer periphery of the rotor, and elastic bodies are provided at both ends of the blade in sliding contact with the inner wall surface of the case. 2. Inside the circular case with a suction port and a discharge port,
A fluid rotary machine in which the rotor is mounted eccentrically from the center of the case, a slide groove is formed inside the rotor that passes through the center, and blades are integrally formed in the slide groove and retract and retract from the rotor in opposition to the outer periphery of the rotor. The inner wall surface on one side of the circular case that does not pass through the center of the rotor is formed in half of a perfect circle, and the inner wall surface on the other side passes from the inner wall surface of the perfect circle through the center of the rotor and has a diameter equal to the diameter of the perfect circle. A fluid rotating machine characterized by being formed at distances of the same length.