JP2001065472A - Pump structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To regulate the feeding amount of fluid and capacity of a pump by varying the rotating speed of the pump without lowering the air-tightness of a pump chamber, to prevent an eccentric rotation of the pump, and to reduce noise generated from the pump. SOLUTION: This pump structure comprises a drive shaft 8 rotating at a position eccentric to the center of a cylinder 5, an inside rotator 7 having slits 71 allowing the drive shaft 8 to slide thereon, a pump chamber 9 where the inside rotator 7 reciprocates according to the rotation of the drive shaft 8, and an outside rotator 6 rotating with a part or the entire surface thereof in contact internally with the inside wall of the cylinder 5, all of which are provided in the cylinder 5. In this case, a blade 61 extended from the outside rotator 6 is inserted slidably into a receiving groove 72 of the blade 61 provided by drilling in the inside rotator 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure such as a pump and a compressor.

[0002]

2. Description of the Related Art Conventionally, most of pumps and compressors generally used are of vane type equipped with blades. This is because the blade slidably fitted into the receiving groove of the rotor is pressed against the inner wall of the cylinder by the centrifugal force generated by the rotation of the rotor, and slides on the inner wall in a close contact state. It rotates while rotating.

However, this vane type pump cannot maintain the airtightness of the pump chamber unless the blade is strongly pressed against the inner wall of the cylinder by increasing the rotation speed of the rotor. Often occurs. In addition, an accident has occurred in which the cutting debris bites into a gap between the blade and the inner wall, and the pump is locked and stopped.

[0004] In the case of locking due to this cause, if the inner wall of the cylinder is damaged, the pump must be replaced with a new one. You spend a lot of time. In particular, when used in a refrigerator or a refrigerator, the situation becomes extremely serious and the user suffers a great deal of damage.

[0005] Further, as described above, in the vane type pump, it is necessary to increase the rotation speed of the rotor in order to maintain the airtightness of the pump chamber. Since the amount of liquid sent could not be adjusted, and the number of blades could not be reduced due to efficiency, the noise was loud and the machines that could be used and their applications were limited.

[0006]

The present invention has been made in view of the above-mentioned problems, and enables adjustment of a liquid supply amount and a capacity by changing a rotation speed of a pump without reducing airtightness of a pump chamber. It is another object of the present invention to provide a pump structure which does not have eccentric rotation and can reduce noise generated from the pump.

[0007]

SUMMARY OF THE INVENTION The gist of the present invention is to provide an inner rotating body which is provided on the inner wall of a cylinder and partially or wholly rotates, and which reciprocates in the outer rotating body. A pump structure in which a drive shaft is slidably mounted in a slit provided in the internal rotating body, and the drive shaft rotates at a position deviated from the center of the cylinder. The pump according to claim 1, wherein a blade receiving groove is formed in the inner rotating body, and a blade is extended to the outer rotating body, and the blade is slidably inserted into the blade receiving groove. Structure.

The structure of the pump according to the present invention will be described in more detail. The cylinder serving as the pump body is cylindrical, and before and after the cylinder, a lid is attached so as to hermetically seal the inside of the cylinder. The mouth and the discharge port are provided at suitable positions. Inside the cylinder, there is provided an outer rotating body that rotates partially or entirely in contact with the inner wall of the cylinder, and inside the outer rotating body, there is provided an inner rotating body that houses a drive shaft.

The drive shaft is provided at a position deviated from the center of the cylinder, and the drive shaft is slidably mounted in a slit provided in the inner rotating body. The shape of the drive shaft and the shape of the slit are not particularly limited as long as they can transmit the rotation and can slide inside the slit without any trouble. The direction of rotation of the drive shaft (the direction of rotation of the pump) is not particularly limited.

A chamber provided in the outer rotating body in which the inner rotating body reciprocates, and the inner rotating body is not particularly limited in its shape, and transmits the rotation of the inner rotating body to the outer rotating body. As long as the inner rotating body can reciprocate (slide) in the room without hindrance. Also, it is preferable that when the inner rotating body approaches the extreme end of the chamber, the gap between the inner rotating body and the wall of the chamber is almost eliminated. The chamber will be a pump room.

The blade receiving groove formed in the inner rotating body is
If the blade extended from the outer rotating body is slidable, the gap width or the depth thereof is not particularly limited, but may be a suitable gap width or depth. The dimensions of the blade to be extended are not particularly limited, and may be any suitable dimensions.

The blade may be formed integrally with the outer rotating body, or may be fixed to the outer rotating body as a separate member, and the method and structure for extending the blade are not particularly limited. It is preferable to provide two blades, and it is desirable that the blades extend in the reciprocating direction of the inner rotating body so that they face each other.

When the blade is inserted to the deepest portion of the blade receiving groove, it is desirable that the blade and the blade receiving groove have the same shape so that the blade and the blade receiving groove are fitted, and the shape is tapered. It is preferable to adopt a tapered shape.

[0014]

Since the structure of the pump according to the present invention is configured as described above, when the drive shaft rotates, the rotation is transmitted to the inner rotating body, and further, the rotation of the inner rotating body is transmitted to the outer rotating body and the outer rotating body is rotated. The rotating body rotates. The drive shaft makes one reciprocation in the slit of the inner rotating body every one rotation, and the inner rotating body makes one reciprocation in the chamber of the outer rotating body every one rotation. Further, the blade extending from the outer rotating body advances and retreats in the blade receiving groove of the inner rotating body in a sliding state with the rotation, and reciprocates in the blade receiving groove every one rotation.

Thus, when the blade passes through the suction port, the pump chamber surrounded by the blade, the outer rotating body and the inner rotating body is sequentially expanded, and liquid or gas is sucked from the suction port. When the blade has passed one round and passed through the air inlet, the sucked liquid or gas is then discharged from the outlet. The pump repeats this cycle.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the structure of the pump of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view of a pump having a structure according to the present invention. The cylinder 6 is an outer rotating body that rotates partially or entirely in contact with the inner wall of the cylinder 5 and has an inner wall 62.
Extends from the blade 61. In the drawing, the entire outer rotating body 6 is inscribed in the inner wall of the cylinder 5. However, if one of the inner wall of the cylinder 5 and the outer wall of the outer rotating body 6 is formed in an uneven shape, The outer rotating body 6 can rotate while partially contacting the inner wall of the cylinder 5.

Reference numeral 7 denotes an inner rotating body which reciprocates in a chamber of the outer rotating body 6, ie, a pump chamber 9. Reference numeral 72 denotes a receiving groove into which the blade 61 is inserted. Reference numeral 8 denotes a drive shaft, which is provided in a slit 71 of the inner rotating body 7. Although the arrow in the figure indicates the rotation direction of the pump, the present pump is not particularly limited to the rotation direction, and may be rotated in a desired direction (left and right).

FIG. 2 is a plan view of the pump, wherein 1 is a pump according to the present invention, 2 is a lid for sealing the inside of a cylinder 5, and one of the lids 2 has a suction port 3 and a discharge port 4. Is provided. A motor 10 is connected to the drive shaft 8 and is a pump drive source. FIG. 3 is an operation diagram showing a state of the rotation operation of the pump.

[0019]

The structure of the pump of the present invention is configured as described above, so that the pump chamber can be kept airtight sufficiently without increasing the rotation speed of the pump, and the rotation speed of the pump can be variably adjusted. Therefore, it is possible to easily adjust the liquid sending amount. In addition, since the rotation speed of the pump can be set to an appropriate speed, the cutting waste generated by the sliding of the blade can be reduced to a level equivalent to nothing, and the cutting waste which is a main cause of the pump locking accident is cut off. Can be prevented.

Furthermore, since the airtightness of the pump chamber can be sufficiently maintained, the number of blades can be reduced, and the noise generated from the pump can be reduced.
Since the pump having this structure does not have eccentric rotation unlike a scroll pump, it can be used stably without generation of vibration for a long period of time. Thus, it can be used not only for compressors such as refrigerators in general households that dislike noise, but also for liquid and gas pumps inside and outside the room that require noise countermeasures.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a pump having a structure according to the present invention.

FIG. 2 is a plan view of a pump.

FIG. 3 is an operation diagram showing a state of a rotation operation of the pump.

[Explanation of symbols]

1-pump, 2-lid, 3-inlet, 4-discharge, 5-
Cylinder, 6-outer rotating body, 61-blade, 62-inner wall, 7-inner rotating body, 71-slit, 72-receiving groove, 8
-Drive shaft, 9-pump room, 10-motor

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[Procedure amendment]

[Submission date] September 2, 1999 (1999.9.2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claim 1

[Correction method] Change

[Correction contents]

Claims (4)

[Claims] An inner rotating body which revolves reciprocally within said outer rotating body, and an inner rotating body which revolves partly or entirely on the inner wall of the cylinder and a slit provided in the inner rotating body. The drive shaft is slidably mounted,
A pump structure wherein the drive shaft rotates at a position deviated from the center of the cylinder. 2. A blade receiving groove is formed in said inner rotating body,
The pump structure according to claim 1, wherein a blade extends to the outer rotating body, and the blade is slidably inserted into the blade receiving groove. 3. The pump structure according to claim 1, wherein two blades are provided and extend in the reciprocating direction of the inner rotating body so that they face each other. 4. The pump structure according to claim 1, wherein when the blade is inserted into the blade receiving groove at the deepest position, the blade and the blade receiving groove are formed so as to fit each other.