JPS59190490A - vane pump - Google Patents

Abstract

PURPOSE:To heighten the performance of a vane pump and reduce its size and weight, by finishing the front surface of the front lid of a motor to a sufficient accuracy of squareness to the axis of rotation and assembling a pump base, a casing, etc. one after another on the finished surface. CONSTITUTION:The front surface 91 of the front lid 9 of a motor B is finished to a sufficient accuracy of squareness to the axis of rotation. A pump base 5, a casing 12, etc. are assembled one after another on the finished surface 91 to constitute an integrated vane pump. Due to this reason, the performance of the pump is very high, its size and weight are small and its cost is relatively low. A sealing sheet 6 is interchangeably secured on the pump base 5 so that the sheet projects in the central part of the pump base. Flat contact sealants 103 fitted on a rotary shaft 10 performs sealing on both the sides of the sheet 6 to eliminate a fear of fluid leak to provide a good volumetric efficiency for a low- viscosity fluid such as an organic solvent, as well. Dynamic pressure causing grooves 31 are provided on both the sides of each vane 3 to attain an excellent sealing effect as well as the smooth motion of the vane.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a vane pump integrated into an electric motor, and in particular provides a small, high-performance, and long-life vane pump for use with low-viscosity fluids such as organic solvents. .

In conventional pumps with an integrated motor, the motor and pump were completed separately and then connected by a casing with a built-in coupling. As a result, misalignment between the pump and the motor occurs, impeding pump performance, and problems such as noise, vibration, number of parts, and cost remain to be resolved.

The present invention solves the above-mentioned conventional problems, and will be explained below based on the drawings. In Fig. 1, A is a vane pump, B is an electric motor, Finish the front face 91 with a high precision perpendicularity to the motor shaft 100 rotation axis,
Pump base 5 and casing 12 are attached to this finished surface 91.
, a pump rotor 4 keyed to the rotating shaft 10 is located inside the casing to which the front plate 1 is sequentially assembled.
A bay 73 is provided in a known manner to be slidable in the radial direction with respect to Vc. Both sides of the base 73 are connected to the pump base 5.
And Vl is sealed and slidable against the wall surface of the front plate 1. A seal plate 6 is fixed to the pump base 5 so as to protrude from its inner diameter, and a plane contact seal 103K attached to the rotating shaft 10 seals both surfaces as shown.

As shown in FIG. 2, the vane 3 preferably has grooves 31 for generating dynamic pressure formed on both sides thereof. In addition, this groove may have a herringbone shape as shown in the figure, and may also be cylindrical and housed in the circular notch 141 of the pump rotor 14, and the outer surface of the groove may be in rolling contact with the inner surface of the casing 12, or the groove may be formed on both sides of the vane. It is more preferable to use a structure as shown in FIG. 4, in which a spiral groove 131 for generating dynamic pressure is formed.

As mentioned above, the present invention consists of a pump mounted on a motor, and the perpendicularity of the front face 91 of the front cover 9 of the motor to the axis of rotation is finished with sufficient precision, and this finished surface 9
1, the pump base 5, casing 12, etc. are successively assembled to form a vane pump integrated with the pump, so a very high performance, small and lightweight vane pump can be obtained at a relatively low cost. Since the seal plate 6 is equipped with a replaceable VC, there is no fear of fluid leakage, and it can be used as a vane pump with good volumetric efficiency for low viscosity fluids such as organic solvents.In particular, the vane has grooves on both sides for generating dynamic pressure. In the case where the vane is formed into a cylindrical shape, the movement of the vane is particularly constant, and at the same time, an excellent sealing effect can be expected, so the pump performance is further improved. 2 is a drawing showing another embodiment of the vane.

Explanation of symbols

Claims (1)

[Claims] (11) A pump base added to the front surface of the lid plate of the electric motor, a casing and a front plate attached to the front surface of the pump base, and a vane attached to the motor shaft. Vane pump. (2) The vane pump according to claim 1, wherein the pump base, casing, and front plate are made of corrosion-resistant materials, and the surfaces in contact with the pump rotor and vanes are subjected to abrasion-resistant surface treatment. ( 3) A wear-resistant seal plate is provided protruding from the inner diameter side of the pump base, and the lip of a planar contact seal member attached to the motor shaft is in contact with the seal plate. (4) The vane pump according to any one of claims 1, 2, or 3, in which grooves for generating dynamic pressure are provided on both sides of the vane. The vane pump according to any one of claims 1, 2, or 3, wherein grooves for generating dynamic pressure are provided in two stages, upper and lower, to suppress torque acting on the vane. (6) The vane is cylindrical. The vane pump according to any one of claims 1, 2, or 3, wherein the outer diameter portion rolls into contact with the inner surface of the casing. (7) Spirals for generating dynamic pressure are provided on both f11 surfaces of the vane. The vane pump according to claim 6, wherein a groove is formed.