阅读说明：本技术 一种泵用叶轮 (Impeller for pump ) 是由 夏国庆 牛祥 于 2018-09-10 设计创作，主要内容包括：本发明公开了一种叶轮,其可绕轴线旋转,包括入口罩和背板。入口孔由入口罩限定,并且多个出口孔位于入口孔径向之外。多个叶片被布置在入口罩和背板之间。叶片作为单件与入口罩一体形成。(An impeller, rotatable about an axis, includes an inlet shroud and a back plate. The inlet aperture is defined by the inlet cover and the plurality of outlet apertures are located radially outward of the inlet aperture. A plurality of vanes are disposed between the inlet cowl and the back plate. The vanes are integrally formed as a single piece with the inlet shroud.)

1. An impeller for a pump, comprising:

an inlet cover;

a back plate;

an inlet aperture defined by the inlet cover, and a plurality of outlet apertures radially outward of the inlet aperture; and

a plurality of vanes disposed between the inlet cover and the back plate, wherein the plurality of vanes are integrally formed as a single piece with the inlet cover.

2. The impeller of claim 1, further comprising:

a pitch from the inlet cowl to the back plate is formed on the plurality of vanes such that a first distance between bottom ends of the plurality of vanes is less than a second distance between plate ends of the plurality of vanes.

3. The impeller of claim 2, further comprising:

a plurality of slots formed in the back plate; and

a plurality of protrusions formed on plate ends of the plurality of blades, wherein the plurality of protrusions are configured to mate with a plurality of slots.

4. The impeller of claim 3, wherein the inlet shroud and the plurality of vanes are formed as a single piece by a single molding.

5. The impeller of claim 4, further comprising:

an annular ring formed on a side of the back plate opposite the plurality of blades and connecting the plurality of protrusions.

6. The impeller of claim 5, wherein the plurality of annular rings are formed by overmolding the annular rings onto the back plate and the plurality of projections.

Technical Field

The present invention relates to an impeller for a fluid pump.

Background

Automobiles and other vehicles use pumps to pressurize fluid, increase the velocity of fluid, or both.

Disclosure of Invention

An impeller is provided that is rotatable about an axis. The impeller includes an inlet shroud and a back plate. An inlet aperture is defined by the inlet cover, and a plurality of outlet apertures are located radially outward of the inlet aperture.

The impeller also includes a plurality of blades disposed between the inlet shroud and the back plate. A plurality of vanes are integrally formed as a single piece with the inlet shroud.

The above features and advantages and other features and advantages of the present invention are readily apparent from the following detailed description of the best modes and other embodiments for carrying out the invention, as defined solely by the appended claims, when read in connection with the accompanying drawings.

Drawings

Fig. 1 is a schematic isometric view of an impeller from the inlet side.

Detailed Description

Referring to the drawings, wherein like reference numbers correspond to like or similar components throughout the several figures, in any possible event, FIG. 1 shows an impeller 10. A pump (not shown), such as a centrifugal pump, may use the impeller 10 to increase the pressure and flow of a working fluid (not shown).

Although the present invention is described in detail with respect to automotive applications, those skilled in the art will recognize the broader applicability of the invention. Those of ordinary skill in the art will appreciate that terms such as "above," "below," "upward," "downward," and the like are used descriptively with respect to the figures and are not meant to limit the scope of the invention, which is defined by the appended claims. Any numerical notation, such as "first" or "second," is merely illustrative and is not intended to limit the scope of the present invention in any way.

The impeller 10 is operatively attached to a drive shaft 12 and is rotatable about an axis 14. As the drive shaft 12 rotates the impeller 10, the working fluid is pumped by accelerating the working fluid outwardly from the axis 14. The path of the working fluid is shown in fig. 1 by inlet flow 16 and outlet flow 18. Since the outward movement of the working fluid is limited by the pump housing (not shown) radially outward of the impeller 10, the kinetic energy of the impeller 10 is converted to pressure. In the view shown in fig. 1, the impeller 10 is typically rotated in a counterclockwise direction.

The impeller 10 includes an inlet shroud 20 and a back plate 22. A plurality of vanes 24 are disposed between inlet cowl 20 and back plate 22. These blades 24 convert the motion of the impeller 10 into the motion or pressure of the working fluid. The vanes 24 are integrally formed as a single piece with the inlet cover 20 such that the vanes 24 are not separately or subsequently attached to the inlet cover 20.

The inlet flow 16 enters an inlet aperture 26 defined by the inlet cowl 20. The inlet bore 26 is substantially coaxial with the drive shaft 12 and the axis 14. The inlet stream 16 may be a substantially continuous flow of working fluid or a flow of working fluid. The outlet flow 18 exits through a plurality of outlet apertures 28, the outlet apertures 28 being radially outward of the inlet aperture 16 from the axis 14.

The impeller 10 may also be defined by a draft angle 30 formed on the blades 24. The slope 30 flares (open) from the inlet shroud 20 to the back plate 22. A first distance 31 between bottom ends 32 of vanes 24 proximate inlet cowl 20 is less than a second distance 33 between plate ends 34 of vanes 24 distal inlet cowl 20.