JPH0727059A - Vane pump - Google Patents

Abstract

PURPOSE:To attain a press feed of articles apt to be easily damaged without generating wearing between a cylinder internal surface and a vane point end. CONSTITUTION:A rotor 4 is eccentrically arranged in the inside of a cylinder 5 provided so that it can be rotated in a casing 1, to bring point ends of vanes 14 held by the rotor 4 into contact with an internal peripheral surface of the cylinder 5, and when the rotor 4 is rotated, also the cylinder 5 is rotated in the same direction, to eliminate generation of wearing between the internal periphery of the cylinder 5 and the point ends of the vanes 14 and further so as to prevent damage from being generated of press fed articles.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vane pump suitable for pressure-feeding an article which has poor fluidity and is difficult to break.

[0002]

2. Description of the Related Art In a conventional vane pump, a cylinder is fixed inside a casing, a rotor is eccentrically installed inside the cylinder, and a plurality of vanes are attached to the rotor so as to be movable in the radial direction of the rotor. Rotation of the vane causes the tip of the vane to slide on the inner peripheral surface of the cylinder. The structure is such that the fluid is discharged to the discharge port.

[0003]

By the way, in the conventional vane pump as described above, since the inner periphery of the fixed cylinder and the tip of the vane are slidably rotated, the tip of the vane is easily worn. At the same time, the object to be pumped is broken at the sliding portion between the inner circumference of the cylinder and the tip of the vane. Therefore, it is not possible to pump foods such as cream, jam, bean paste, seaweed, etc. There is a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a vane pump capable of pressure-feeding an article which has poor fluidity and is susceptible to breakage.

[0005]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention relates to a cylinder having a plurality of passages rotatably incorporated inside a casing having an intake port and a discharge port. A plurality of vanes whose tips are in contact with the inner peripheral surface of the cylinder are attached to a rotor provided so as to rotate at an eccentric position inside so as to be movable in the radial direction, and the cylinder is integrally rotated together with the rotor in the same direction. This is the structure adopted.

[0006]

When the rotor is rotated and the article is pressure-fed by the change in the volume of the pump chamber between the vanes, the vane whose tip comes into contact with the cylinder due to the centrifugal force causes the cylinder to integrally rotate in the same direction. Since there is no occurrence of sliding, the occurrence of wear at the tip of the vane is suppressed, and no breakage of the article occurs between the vane and the inner circumference of the cylinder.

Therefore, creams and jams which are not to be broken,
It is possible to pump food such as bean paste.

[0008]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

As shown in the figure, a cylindrical casing 1 is provided with an intake port 2 and a discharge port 3 on both sides, and a rotor 4 and a cylinder 5 are housed inside the casing 1.

The cylinder 5 is formed by projecting in a cylindrical shape that fits into the casing 1 at a portion on one surface side of the annular plate 6 that fits into the casing 1, and is provided on the other surface side of the annular plate 6. The holding cylinder 7 is rotatably held in the casing 1 via various bearings 8, and the cylinder 5 is rotatably in the casing 1.

The cylinder 5 is provided with a large number of through holes 9 at regular intervals in the circumferential direction, and when the cylinder 5 rotates, each through hole 9 communicates with the suction port 2 or the discharge port 3 in sequence. It will be.

The rotor 4 is fixed to the tip of an input shaft 10 arranged so as to be eccentric to the cylinder 5 in the casing 1, and a part of the outer peripheral surface is the inner peripheral surface of the cylinder 5 and the suction port 2 is provided.
It comes into contact with the positions between the discharge port 3 and the communication port 9 and rotates at an eccentric position in the cylinder 5.

As shown in FIG. 2, the front end of the casing 1 is closed by the front cover 11, and the front end of the cylinder 5 is closed.
The rotor 4 comes into contact with the airtight plate 12 provided on the inner side of the cylinder 4, is housed between the annular plate 6 and the airtight plate 12, and rotates at the eccentric position of the cylinder 5.

The rotor 4 has a radial slit 1
3 are provided in a radial arrangement at regular intervals in the circumferential direction, and vanes 14 are inserted in each slit 13 so as to be movable in the radial direction of the rotor 4.

The vane 14 has a height at which a tip thereof abuts on an inner peripheral surface of the cylinder 5 and a rear end thereof abuts on a mouth ring 15 arranged so as to be coaxial with the cylinder 5 in the rotor 4, and the annular plate 6. Has a lateral width in which both ends are in sliding contact with the end face and the airtight plate 12, and the rotor 4 rotates integrally with the rotation.

Incidentally, at least one vane 14a is, as shown in FIG. 1, a concave groove 1 formed on the inner peripheral surface of the cylinder 5.
The tip of the cylinder 6 is engaged with the inside of the cylinder 6, and the cylinder 5 is integrally rotated in the same direction through the vanes 14a when the rotor 4 rotates.

The concave groove 16 is provided between the through holes 9 on the inner circumference of the cylinder 5, so that the tip of each vane 14 abuts on the inner circumferential surface of the cylinder 5 at a position between the through holes 9 and each vane. 1
The pump chambers 17 formed between the four communicate with the through ports 9.

As a means for integrally rotating the rotor 4 and the cylinder 5 in the same direction, an internal gear 18 is provided on the inner peripheral surface of the holding cylinder 7 in the cylinder 5, as shown in FIG.
A gear 19 partly meshing with the internal gear 18 is fixed to the boss portion of the rotor 4, and the rotor 4 is inserted through both gears 18 and 19.
May be transmitted to the cylinder 5.

The vane pump of the present invention has the above-mentioned structure, and when the rotor 4 is rotated by the input shaft 10 connected to the motor, the vane 14 has its tip pressed against the inner peripheral surface of the cylinder 5 by centrifugal force. The cylinder 5 also rotates integrally with the rotor 4 in the same direction.

Since the rotor 4 rotates eccentrically with respect to the cylinder 5, the vane 1 is formed on the inner circumference of the cylinder 5 and the outer circumference of the rotor 6.
The volume of the pump chamber 17 formed between the four chambers changes with rotation, and when the pump chamber 17 communicates with the suction port 2 through the passage port 9, the pump chamber 17 sucks articles from the suction port 2 and passes through the passage port 9. When it communicates with the discharge port 3, the article is pressure-fed to the discharge port 3.

As described above, since the rotor 4 and the cylinder 5 rotate integrally in the same direction, there is no change in the position of the abutting portion between the tip of the vane 14 and the inner peripheral surface of the cylinder 5, and there is sliding on the abutting portion. Since this does not occur, the article to be pumped at this portion will not be broken.

Therefore, foods such as cream, jam, bean paste, etc., which have poor fluidity and are difficult to break, can be pressure-fed without any trouble, and the tip of the vane 14 and the inner peripheral surface of the cylinder 5 are not worn. It can be prevented from occurring.

[0023]

As described above, according to the present invention, in the vane pump, the rotor holding the vane and the cylinder are rotated integrally, so that the sliding of the cylinder and the tip of the vane is eliminated, and the cylinder inner peripheral surface is eliminated. The wear of the tip of the vane can be eliminated and the durability can be improved.

Further, the occurrence of breakage of the article between the cylinder and the tip of the vane is eliminated, and it becomes possible to pressure-feed the article which is not broken.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view of a vane pump according to the present invention.

FIG. 2 is a vertical sectional side view of the above.

[Explanation of symbols]

 1 casing 2 suction port 3 discharge port 4 rotor 5 cylinder 14 vane 17 pump chamber

Claims (1)

[Claims] 1. A rotor provided so that a cylinder having a plurality of passages is rotatably installed inside a casing having an intake port and a discharge port, and a tip of the cylinder is attached to a rotor provided so as to rotate at an eccentric position inside the cylinder. A vane pump in which a plurality of vanes that are in contact with the inner peripheral surface of the cylinder are attached so as to be movable in the radial direction, and the cylinder is integrally rotated together with the rotor in the same direction.