JPH05240167A - Vane pump - Google Patents

Abstract

PURPOSE:To prevent the wear of a casing by a guide ring and keep a regularly stable operating state by mounting an auxiliary ring formed from a wear resisting material such as reinforced Teflon on the end surface of the guide ring making contact with the inner wall surface of the casing. CONSTITUTION:An auxiliary ring 2A fitted to the fitting groove 21 on the outer circumferential end surface of a guide ring 2 is formed from a wear resisting material such as reinforced Teflon or a phenol resin rubber, and the guide ring 2 is received in guide ring receiving recessed parts 3B on both sides of a rotor 3, and the auxiliary ring 2A makes contact with the port plate 12 of a casing 1 and the inner wall surface of an end plate 13, respectively. By rotating a rotor 3 at low speed, vanes 4 are rotated while being guided by the guide ring 2 and sucked through a suction hole 12 to discharge a material to be transferred blocked between the vanes 4 through a discharge hole 12B. When the guide ring 2 is pressed and moved, the auxiliary ring 2A is pressed onto the inner wall surface of the casing 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a positive displacement vane pump for transferring a high viscosity material such as jam or mayonnaise at low speed.

[0002]

2. Description of the Related Art In a vane pump, a guide ring of a vane installed in a caging is constructed so as to directly contact an inner wall surface of the caging. However, in such a conventional vane pump, when the guide ring is pressed by the rotation of the vane and moves in the direction perpendicular to the rotating surface of the vane, the inner wall surface of the caging is worn by the guide ring, which causes a malfunction. there were.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and an object of the present invention is to prevent wear of a casing due to a guide ring and to always maintain a stable operating state. It is to provide a vane pump that can be maintained.

[0004]

The vane pump of the present invention is a vane pump in which a guide ring and a vane that rotates by being guided by the guide ring are provided in the casing, and the end surface of the guide ring that contacts the inner wall surface of the casing. In addition, an auxiliary ring made of a material having abrasion resistance such as reinforced Teflon is attached.

[0005]

According to the vane pump of the present invention, an auxiliary ring made of a material having wear resistance such as reinforced Teflon is attached to the end surface of the guide ring that contacts the inner wall surface of the casing. Since the auxiliary ring is interposed between the inner wall surface of the casing and the inner wall surface of the casing, abrasion of the inner wall surface of the casing can be prevented.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The vane pump of the present invention will be described below with reference to the illustrated embodiments. A guide ring 2, a rotor 3 and a vane 4 are installed in the vane pump casing 1.

As shown in FIGS. 1 and 7, the casing 1 is constructed by closing both sides of a casing main body 11 with a port plate 12 and an end plate 13, and the casing 1 is provided with a port block 6 via a port plate 12. Is attached. The port plate 12 has a suction port 12A and a discharge port 12B.

A plurality of vane grooves 3A are provided on the circumferential end surface of the rotor 3 at equal intervals in the circumferential direction and radially, and guide ring receiving recesses 3B are formed on both side end surfaces of the rotor 3. The vane 4 is loosely fitted in the vane groove 3A. A shaft 5 is attached to the rotor 3.

As shown in FIG. 3, a fitting groove 21 is provided around the outer end surface of the guide ring 2, and the fitting groove 21 is provided.
Auxiliary ring 2A is fitted in. The auxiliary ring 2A is formed of a material having wear resistance such as reinforced Tenron or phenol resin rubber.

The guide rings 2 are housed in the guide ring housing recesses 3B on both sides of the rotor 3, respectively, and the auxiliary rings 2A contact the inner wall surfaces of the port plate 12 and the end plate 13 of the casing 1, respectively. (Fig. 1).

In FIG. 7, A1 is a rotor pressing metal fitting, A
2 is an O-ring, A3 is a mechanical seal, A4 is a gland spacer, A5 is an oil seal, A6 is a bearing,
A7 is a rotor key, A8 is a snap ring, A9 is a pulley key, and A10 is a bearing housing.

In the vane pump constructed as described above, when the rotor 3 rotates at a low speed, the vane 4 rotates while being guided by the guide ring 2, and is sucked from the suction port 12A and trapped between the vanes 4. The transferred object (not shown) is discharged from the discharge port 12B.
When the guide ring 2 is pressed by the rotation of the vane 4 and moves in the direction perpendicular to the rotating surface of the vane 4, the auxiliary ring 2A is pressed against the inner wall surfaces of the port plate 12 and the end plate 13 of the casing 1. .

[0013]

According to the vane pump of the present invention, since the auxiliary ring is interposed between the guide ring and the inner wall surface of the casing, abrasion of the casing due to the guide ring can be prevented.

[0014]

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of a vane pump of the present invention.

FIG. 2 is a front sectional view showing an embodiment of a vane pump of the present invention.

FIG. 3 is a front view of a guide ring of the vane pump of the present invention.

FIG. 4 is a side sectional view of a guide ring of the vane pump of the present invention.

FIG. 5 is a front view of an auxiliary ring of the vane pump of the present invention.

FIG. 6 is a side sectional view of an auxiliary ring of the vane pump of the present invention.

FIG. 7 is an exploded perspective view of the vane pump of the present invention.

[Explanation of reference numerals] 1 casing 2 guide ring 2A auxiliary ring 4 vane

Claims (1)

[Claims] 1. A vane pump in which a guide ring and a vane which is guided and rotated by the guide ring are installed in a casing, wherein an end surface of the guide ring which comes into contact with an inner wall surface of the casing is provided with wear resistance such as reinforced Teflon. A vane pump, characterized in that an auxiliary ring formed of a material having the same is attached.