JPS59203891A - Vane pump motor - Google Patents

Abstract

PURPOSE:To prevent fluid in a space between a vane and a vane groove from leaking by a methoe wherein grooves are provided at both sides of the vane groove to insert sealing members and the sealing members are pushed against the vane from the sides thereof. CONSTITUTION:The vanes 1, 2, integrated in the diagonal directions and both ends thereof are contacting with a cam ring 5, is provided slidably in the vane grooves 3a, 3b passing through the center O of a rotor 3 rotated by an input shaft. The device is provided with a suction port 8 and a discharging port 9. The sealing members 10A, 10B are inserted into the grooves 12 provided at both sides of the vane groove, the sawteeth like recess and protuberance at one side thereof contacts with the side surface of the vane while the sealing member is pushed against the vane by the leaf springs 11A, 11B of the groove 12. According to this method, high-pressure fluid, generated in the discharging port 9, may be prevented from leaking through the spaces between the vanes 1, 2 and the grooves 3a, 3b and the high pressure fluid may be kept at the side of the discharging side. When it is used as a motor, a high pressure in the suction port 8 may be prevented from leaking from a space between the vane and the groove.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a rotor that rotates around the center line of an input shaft, and a cam ring that connects the outer periphery of a vane with a constant diagonal length to the rotor in a diagonal direction passing through the center line. This relates to a vane pump motor having the shape of

This type of vane pump motor differs from conventional vane pumps in that the vane groove passes through the center of the rotor and penetrates in the opposite direction, so fluid may leak from the high pressure side to the low pressure side through the gap between the vanes and the vane groove. This invention provides a sealing material to prevent this.

1 and 2 in the figure are both vanes, and there are notches 1a and 2a (not shown) in their respective intermediate parts, which intersect with each other,
The midpoints A and B are centered on point C and lie on the circumference passing through the center O of the rotor 3, and are in symmetrical positions with respect to each other, and the vanes are in vane grooves 3a and 3b that are perpendicular to each other passing through the center of the rotor. make a reciprocating motion. The input shaft 4 is attached to a boss 3C that is integrated with the rotor, and drives the rotor. 5
is a pump casing, the inner periphery of which is a cam ring whose shape follows the locus of movement of the tips D, D', E, and E' of the vanes 1 and 2. 6 and 7 are the side plates, and the vanes and rotor slide between them.

The side plate 7 has a recess into which the rotor boss 3 is inserted and a hole through which the input shaft passes. A suction port 8 and a discharge port 9 are provided on the side surface of the casing 5, and as the vane rotates in the direction of arrow A, the fluid is sucked in and discharged vertically. 10A and 10B are sealing materials located in the grooves 12 of the rotor, and one side of which has sawtooth-like unevenness and comes into contact with the side surface of the vane. Reference numerals 11A and 11B are leaf springs having a bent shape, located between the sealing material and the groove in which it is placed, and pushing the sealing material toward the vane to eliminate the gap between the sealing material and the vane.

In this way, the sealing materials 10A and 10B are in the grooves 12 and are pressed against the vanes 1 and 2 by the leaf springs 11A and 11B, so the sawtooth convex portions 11a of the sealing materials hit the vanes with a high unit pressure. Since the high-pressure fluid generated at the discharge port 9 is prevented from leaking between the vanes 1 and 2 and the grooves 3a3b, the high-pressure fluid can be maintained on the discharge port side. Also, when this is used as a motor, it has the effect of preventing high pressure at the suction port from leaking between the vane and its groove.

[Brief explanation of the drawing]

Figure 1 is a plan sectional view of this device, Figure 2 is E-F-G-
H cross section is shown. 1, 2...Bane. 3... Rotor 3a, 3b,... Vane groove 5... Cam ring. 8...
...Suction port 9...Outlet port, 10A, 10B, ...Seal material, 10a...Seal material convex portion 11A, 11B...Plate spring. Patent applicant Yoichi Mouri

Claims (1)

[Claims] It slides in a vane groove that passes through the center of the rotor rotated by the input shaft, and there are vanes that are integrated diagonally and contact the cam ring at both ends, and the cam ring's shape is eccentric to the rotor. , a pump motor with an inlet and an outlet on each side, has grooves for sealing material on both sides of the vane groove provided in the rotor, and the sealing material in the groove is pressed from the side of the vane to form a groove in the vane groove. A vane pump motor that prevents fluid from leaking between the vanes.