ROTARY SCREENING DEVICE WITH BEARINGS

Abstract

Rotary screens used in rotary screening devices for cleaning water in which the prior art trunnion wheels on current state of the art rotary screening devices are substituted by a rocker shoe and a bearing on the rotary screen running on the rocker shoe.

Claims

1. A rotary screening device for cleaning water, said rotary screening device comprising: a. a housing, said housing containing, b. a rotary screen, said rotary screen providing separation of particulate solid matter from water; c. said rotary screen powered at a first end by a motor, said second end rotating on a rocker shoe, said second end outside surface supporting a bearing, said bearing being lubricated by water and contacting said rocker shoe; d. a system for delivering said water to said bearing while said bearing is in use; e. said rotary screen further comprising a spray bar for providing cleaning water to the outside surface of said rotary screen; f. a water system for delivering water to said spray bar; g. an inlet for supplying and distributing uncleaned water to the interior of said rotary screen; h. a water exit from said housing; i. a solids outlet from said rotary screen.

2. In combination, a rocker shoe of a rotary screening device and a bearing on the outside surface of a rotary screen in said rotary screening device.

3. A rotary screening device for cleaning water as claimed in claim 1 wherein the rotary screen bearing is manufactured from plastic.

4. A rotary screening device for cleaning water as claimed in claim 1 wherein the rotary screen bearing is manufactured from ceramic.

5. A rotary screening device for cleaning water as claimed in claim 1 wherein the rotary screen bearing is manufactured from metal.

6. A rotary screening device for cleaning water as claimed in claim 5, wherein the metal is stainless steel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] FIG. 1 is a segment end view of a prior art rotary screening device showing the prior art trunnion wheel on one end of the rotary screening device.

[0012] FIG. 2 is a full side view of one version of the instant invention, a rotary screening device with a bearing.

[0013] FIG. 3 is a cross-sectional of the device of FIG. 2 through line A-A of FIG. 2.

[0014] FIG. 4 is a segment view of the bearing and rocker arm of the instant invention.

[0015] FIG. 5 is a segment of the bearing showing the spray lubrication.

DETAILED DESCRIPTION OF THE INVENTION

[0016] FIG. 1 is a segmental view of a prior art rotary screen device in which there is shown the use of trunnion rollers 19. This is shown to indicate the prior art use of such devices in comparison to the instant invention in which the trunnion rollers 19 have been replaced by a rocker shoe and a bearing (described in detail infra).

[0017] Turning to FIG. 2, there is shown a device of this invention which is a rotary screen device 1. It is equipped with a motor and gear box 2, an inlet 3 for the aqueous material to be treated, an outlet 4 for the solids removed from the aqueous media, a support stand 5 for supporting the rotary screen device 1, a clean water inlet 6, a housing 7, and at the lower end of the housing 7 there is shown bearings 9, on the outside surface of the housing 7 and a rocker shoe 10 with a bearing 11 (shown in phantom) near the bottom edge 12 thereof.

[0018] It is contemplated with the scope of this invention to manufacture the device 1 such that the inlet 6 is on the opposite end of the housing 7.

[0019] FIG. 3 is a cross sectional view through line A-A of FIG. 1, showing the additional components of the device 1. There is shown a motor and gear box 2, an inlet 3 for the aqueous material to be treated, an outlet 4 for the solids removed from the aqueous media, a support stand 5 for supporting the rotary screen device 1, a clean water inlet 6, and a housing 7. Also shown is the rotary screen 8 and the rocker shoe 10 along with the bearing 11 near the bottom edge 12 thereof (shown in phantom). The drawings show a narrow gap between the bearing 9 and the rocker shoe 10 for clarity purposes. In working order, the surface of the bearing 9 rides on the inside surface of the rocker shoe 10. See also FIG. 4.

[0020] The bearing on the rotary screen can be manufactured from plastics, metal, such as stainless steel, ceramics, and the like.

[0021] Any plastic used in the plastic bearing can be such materials as Thordon or Vesconite brand bearing materials available from Thordon Bearings Inc. Burlington, Ontario, Canada, ultra-high molecular weight polyethylene, high density polyethylene or c ross-linked polyethylene.

[0022] There is a plurality of sprayers 13 located above the roller screen 8 to cleanse the roller screen. Water for this purpose is introduced at the freshwater inlet 14. The detail in the sprayers 14 is shown in FIG. 5, wherein there is shown the sprayers 14, the freshwater inlet tube 15, the roller screen 8, and the bearing 9. Shown in FIG. 5 is the furnishing of water to the bearing 9, but the bearing 9 is also furnished water as a lubricant at the inlet port 16 shown in FIG. 2.

[0023] FIG. 4 is a detail of the rocker shoe 10 and the bearing 10 along with the bearing 11 and a steel pin 17 to support the bearing 11.

[0024] It should be noted that the exact placement of the various components on the rotary screen device is not critical except for the placement of the rocker shoe and the bearing.