JPH06129365A - Vane of pump - Google Patents

Abstract

PURPOSE:To enhance the anti-abrasiveness by fitting each vane in a groove formed in a rotor, and sliding the vane smoothly when a pump is in operation. CONSTITUTION:Each vane is slidably fitted in a groove 5 provided in a rotor 4, and crowning process is applied to the front and rear surfaces of the body 10 of the wane to form curved surfaces 10a, 10b there, and thereby the edge load applied to the wane body 10 is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vane of a vane pump.

[0002]

2. Description of the Related Art As shown in FIG.
The cam ring 2 is mounted inside, the rotor 4 is mounted on the drive shaft 3 provided at the eccentric position of the cam ring 2, and the vanes 6 are provided in the plurality of vane fitting grooves 5 provided in the circumferential direction of the rotor 4.
Is slidably inserted, and the vane 6 is slid along the inner surface of the cam ring 2 by the centrifugal force generated by the rotation of the drive shaft 3 to suck the fluid from the suction port 7 into the cam ring 2 and to discharge the fluid from the discharge port 8. A vane pump that is designed to discharge from is known.

In the above vane pump, since the vane 6 is slid along the vane fitting groove 5, a minute gap is formed between the vane fitting groove 5 and the vane 6.

Therefore, when the vane 6 moves in the outward direction of the rotor 4, the reaction force of the discharge fluid acting on the front surface of the vane 6 in the rotation direction causes the vane 6 to move into the vane fitting groove as shown in FIG. 5 is inclined.

[0005]

By the way, in the conventional vane 6, since the front and rear surfaces 6a and 6b in the rotor rotating direction are parallel flat surfaces, as shown in FIG.
When tilted, the edge 6e at the inner diameter side end of the vane 6 comes into contact with the front surface 5a of the vane fitting groove 5 in the rotational direction, and the edge 5e at the opening of the vane fitting groove 5 comes into contact with the rear surface 6b of the vane 6. , The edge load acting on the vane 6 is large, and the edge load acts as a sliding resistance of the vane 6 that slides along the vane fitting groove 5, the sliding of the vane 6 lacks smoothness, and the rotation torque of the rotor 4 is reduced. Has the disadvantage of being large.

Further, there is also a disadvantage that the vane 6 is easily worn by the edge load acting on the vane 6.

The present invention solves the above-mentioned inconveniences and makes it possible to smoothly slide the vanes along the vane fitting grooves to reduce the rotational torque of the rotor and improve the wear resistance of the vanes. It is a specific subject.

[0008]

In order to solve the above problems, according to the present invention, the crowning in the sliding direction is provided on the front and rear surfaces of the vane body slidably inserted into the vane fitting groove of the rotor in the rotor rotating direction. It adopted the configuration that has been applied.

Here, the crowning may be a full crowning in which the entire front and rear surfaces of the vane body are bent in the sliding direction, or a partial crowning in which only both ends of the front and rear surfaces in the sliding direction are bent. Good.

[0010]

As described above, by crowning the front and rear surfaces of the vane body, when the vane body moved outward of the rotor is tilted with respect to the vane fitting groove by the reaction force of the discharge fluid, the front side of the vane body is The curved surface comes into contact with the front surface of the vane fitting groove in the rotation direction, and the rear curved surface of the vane body comes into contact with the edge of the opening of the vane fitting groove, so that the edge load acting on the vane body is small and the vane fitting is small. The vane body can be slid smoothly against the mating groove.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.

As shown in FIGS. 1A and 1B, the vane main body 10 slidably inserted into the vane fitting groove 5 of the rotor 4 has a plate-like shape, and the vane main body 10 extends in the rotor rotation direction. The front and rear surfaces are curved in the sliding direction to form curved surfaces 10a and 10b.

Here, as shown in FIG. 1A, the crowning may be full crowning in which the entire front and rear surfaces of the vane body 10 are bent in the sliding direction of the vane body 10, as shown in FIG. In addition, the partial crowning in which only both ends of the front and rear surfaces of the vane body 10 in the sliding direction are curved may be used.

For the crowning, a mechanical working method such as polishing, a plastic working method such as pressing, a working method using a barrel, a drawing method and the like can be adopted.

As described above, the front and rear surfaces of the vane body 10 are crowned so that the front and rear surfaces are curved surfaces 10a and 10b, so that the vane body 10 moves toward the outside of the rotor 4 and the reaction force of the discharge fluid is generated. When the vane main body 10 is tilted with respect to the vane fitting groove 5 due to, the curved surface 10a on the front side in the rotation direction comes into contact with the front surface 5a in the rotation direction of the vane fitting groove 5 as shown in FIG. The edge 5e at the opening of the rotor fitting groove 5 comes into contact with the curved surface 10b.

Therefore, the edge load acting on the vane main body 10 is smaller than that of a vane in which the front and rear surfaces of the vane main body are parallel planes, and the vane main body 1 is operated during pump operation.
0 slides smoothly with respect to the vane fitting groove 5, and wear of the vane body 10 can be suppressed.

[0017]

As described above, in the vane according to the present invention, since the front and rear surfaces of the vane body are crowned, the edge load acting on the vane body is reduced, and the vane fits into the vane fitting groove. The main body can be slid smoothly, the rotation torque of the rotor can be reduced, and the vane wear resistance can be improved.

[Brief description of drawings]

FIG. 1A is a perspective view showing an embodiment of a vane according to the present invention, and FIG. 1B is a cross-sectional view showing a state in which the vane of the same is incorporated in a vane fitting groove of a rotor.

FIG. 2 is a perspective view showing another embodiment of the above vane.

FIG. 3 is a vertical side view of the vane pump.

FIG. 4 is a sectional view showing a conventional vane.

[Explanation of symbols]

 4 rotor 5 vane fitting groove 10 vane

Claims (1)

[Claims] 1. A vane for a vane pump, wherein a vane body slidably inserted into a vane fitting groove of a rotor is crowned in the sliding direction on the front and rear surfaces in the rotor rotating direction.