JPS6345583Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a rotor device for a rotary pump in which a rotor having blades that can move forward and backward is mounted eccentrically in a casing.

As is well known, the above type of rotary pump was constructed as shown in FIG. That is, in the figure, a is a casing, b is a drive shaft provided eccentrically at the center of the inner circle of casing a, c is a rotor fixed to drive shaft b, and d is provided on the outer periphery of rotor c so that it can move forward and backward. a plurality of blades, e indicates a bushing rod, f indicates a suction passage, g indicates a discharge passage;
As the rotor c rotates in the direction of the arrow, the liquid in the suction side chamber _f1 is sequentially sent out into the discharge side chamber _g1 via the confinement chamber h, but in this type, As the rotor c rotates, the volume inside the confinement chamber h changes, that is, at the stage where the volume increases, the confinement chamber h
The inside exhibits a vacuum phenomenon, in other words, a negative pressure phenomenon, and a compression phenomenon occurs during the shrinking stage, which causes bubbles and high pressure, which causes noise and power loss. Ta. To explain this point in more detail, air bubbles are generated when the volume inside the confinement chamber h increases as described above, and the blade d at one end forming the confinement chamber h (the blade on the right in the figure)
reaches the opening of the discharge side chamber _g1 , the discharge chamber i
The discharge pressure was propagated through the air, causing a rapid pressure rise and the bubbles bursting, producing noise.

It is also known to process the inner periphery of the casing to form a circular shape concentric with the outer periphery of the rotor in order to prevent the above-mentioned volume change, but this is not preferred as it increases the cost considerably.

This idea was created by focusing on the points mentioned above.
The purpose is to provide a rotor device for a rotary pump in which the volume of the confinement chamber changes as the rotor rotates, that is, the generation of noise in the stages of increasing and decreasing the volume can be reduced, and energy can be saved at the same time. .

Furthermore, another object of the present invention is to provide a rotor in a rotary pump that can be manufactured at low cost by requiring only a small amount of machining on the rotor's blade guide groove and by making the inner circumferential surface of the casing into a perfect circle. We are here to provide you with the equipment.

Next, an embodiment of the present invention capable of achieving the above object will be described in detail with reference to FIGS. 2 and 3.

1 is a casing, 2 is a drive shaft eccentrically mounted on the center of the inner circle of the casing 1, 3 is a rotor fixed to the drive shaft 2, and 4 is movable in a guide groove 3a provided on the outer periphery of the rotor 3. 5 is a bushing rod, 6 is a suction passage, 6a is a suction side chamber, 7 is a discharge passage, and 7a is a discharge side chamber, except for the rotor 3. The other components are of the conventionally well-known eccentric type. Since it is similar to a rotary pump, a detailed explanation thereof will be omitted.

As shown in FIG. 3, each guide groove 3a of the rotor 3 has a plurality of relief grooves 3b and 3c vertically formed on each surface in the direction opposite to the rotational direction of the rotor 3, which communicate with the lower space 3d of the guide groove 3a. direction (the direction in which the blade 4 advances and retreats). That is, two wide relief grooves 3b are provided in the rotation direction, and two narrow relief grooves 3c are provided in the opposite direction.

In the above configuration, as the rotor 3 rotates, the blades 4 are guided by the guide grooves 3a of the rotor 3 and move forward and backward in the radial direction, and the volume of the lower space 3d of the guide groove 3a changes with this movement. Due to this change in volume, the liquid sucked into the space 3d is pushed out into the discharge side chamber 7a through the relief groove 3b, thereby preventing the generation of abnormal pressure due to the change in volume and effectively using the liquid as the pump's discharge amount. be done. Further, as the rotor 3 rotates, when the containment chamber indicated by reference numeral 8 exhibits a vacuum phenomenon in the early stage, liquid is replenished from the space 3d through the relief groove 3c, and when a compression phenomenon occurs in the latter stage, the liquid is supplied to the relief groove 3c.
The liquid escapes into the suction side chamber 6a.

One embodiment of the present invention has been described above, but
The relief grooves 3b and 3c of the rotor 3 are not limited to the above, that is, the relief grooves 3b, 3b and 3c, 3 each have two grooves.
In some cases, a single groove with a width that is the sum of c is provided, and in other cases, 3 grooves, 4 grooves, etc. are provided.

As described above, the present device has the effect of reducing noise generated when the volume of the containment chamber changes as the rotor rotates, i.e., when the volume increases and decreases, while at the same time saving energy. In addition, since only a small amount of machining is required for the guide groove of the rotor and the machined shape of the inner surface of the casing is sufficient to be a perfect circle, it also has the effect of reducing costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal side view of a conventional rotary pump, FIG. 2 is a longitudinal side view of the device of the present invention, and FIG. 3 is a perspective view of the rotor in the same. 1...Casing, 3...Rotor, 3a...
Guide groove, 3b, 3c... relief groove, 4... blade.

Claims (1)

[Claims for Utility Model Registration] (1) In a rotary pump in which a plurality of blades are movably provided on a rotary mounted eccentrically in a casing, the direction of rotation of the rotor in guide grooves of the blades bored in the rotor and A rotor device for a rotary pump, characterized in that each face in the opposite direction is provided with a vertical escape groove that communicates with the lower space of the guide groove. (2) A rotor device in a rotary pump according to claim 1, wherein the relief grooves in the rotor rotation direction are two wide grooves, and the relief grooves in the opposite direction to the rotor rotation direction are two narrow grooves. (3) A rotor in a rotary pump according to claim 1 or 2 of the utility model registration claim, which is formed as a single piece with a combined width of two relief grooves in the rotor rotation direction and in the opposite direction. Device.