Spiral fluted wheel for a pump

Abstract

A spiral fluted wheel (10) for a pump is composed of a first plate (11), a second plate (12) corresponding to the first plate (11), and a plurality of spiral blades sandwiched between the first plate (11) and the second plate (12). The plurality of spiral blades are combined easily and each has a large welding area corresponding to the first plate (11) and the second plate (12) so as to make the wheel have excellent endurance and precision in structure.

Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a spiral fluted wheel for a pump, and more particularly to a spiral fluted wheel that has excellent endurance and can be produced rapidly and precisely.

[0003] 2. Description of Related Art

[0004] Referring to FIGS. 4, 5 and 6, a water pump with a conventional multiple vane case comprises a shell (30), multiple vane cases (31), multiple guide cases (311), a filter (32), a motor (33) with an electricity supply wire (34), and a water outlet pipe (35). The water pump is typically received in a well to draw water therefrom.

[0005] The shell (30) contains the multiple vane cases (31) and the multiple guide cases (311) in alternative with each other inside and the filter (32) is mounted under the shell (30) to filtrate water by its meshes. The motor (33) is secured under the filter (32) and has an axle tube (330) penetrating the multiple vane cases (31) and the multiple guide cases (311) and driving all cases (31, 311) to rotate. The water pipe (35) is communicated with the shell (30) to pump water out of the well. Additionally, the multiple guide cases (311) each has a plurality of guide waterways (3110) defined therein. The guide waterways (3110) communicate with two vane cases (31) adjacent to the guide case (311).

[0006] The detail structure of the vane case (31) is shown particularly in FIG. 6. The vane case (31) is composed of an upper plate (310), a lower plate (313) respectively combined with the upper plate (310), and each combined pair of upper and lower plates (310, 313) has a plurality of vane strips (315) sandwiched therebetween.

[0007] The upper plate (310) is a round plate having a hole (3101) defined in the center and the hole (3101) has a toothed periphery. The axle tube (330) has a toothed circumference to penetrate and drivingly engage each upper plate (310) via mating between the toothed periphery of the hole (3101) and the toothed circumference of the axle tube (330). The lower plate (313) is a round plate corresponding to the upper plate (310) and an aperture (3131) is defined in the center of the lower plate (313). The aperture (3131) has larger diameter than a maximum diameter of the axle tube (330) to allow water to flow into the vane cases (31). The plurality of vane strips (315) are spirally arranged between the upper plate (310) and the lower plate (313) so that multiple channels are formed therebetween. The vane strips (315) are spot welded to both the upper and lower plates (310, 313).

[0008] Now referring to FIG. 5 again, when the motor operates, the axle tube (330) drives the multiple vane cases (31) to rotate to cause centrifugal force to water. so that the water inside the vane cases (31) starts to be thrown out by the centrifugal force and the water outside the vane cases (31) is filtrated by the filter (32) and attracted into the multiple vane cases (31) via the aperture (3131) of the lower plate (313). . The rotating multiple vane cases (31) cause centrifugal force to the water so as to make the water travels spirally along the channels between vane strips (315) and be expelled from the vane cases (31),. When the water is throw out of the vane cases (31), the guide waterways (3110) of the guide cases (311) receive the thrown water and spiral the water up to another upper vane cases. Therefore, the water is pumped up gradually to reach the water pipe (35) when the axle tube (330) rotates fast enough, and then the water is pumped from the well.

[0009] However, several drawbacks exist in this conventional water pump:

[0010] 1. Not Endurable:

[0011] For efficiency of pumping water, the vane strips (315) must be thin. Therefore, spot-welding of areas of the vane strips (315) to the upper plate (310) and the lower plate (315) are small and not firm enough. When the rotating speed of the vane cases (31) is high, especially after rapid acceleration, the vane strips (315) easily loosen to cause disturbance and obstruction to the water flow. Moreover, the vane strips (315) can become completely loosened from the upper and lower plates (310,313) and then stuck inside the water pump to cause serious damage to the water pump. On the contrary, if the vane strips (315) are thick, efficiency of the water pump is reduced and product cost is raised.

[0012] 2. Time-Wasting in Combination:

[0013] For one vane case (31), the vane strips have to be welded precisely to make the water flow fluently inside the vane case (31). However, welding the thin and fiddly vane strips (315) to the upper plate (310) and the lower plate (313) is troublesome and time-wasting.

[0014] In order to make the water pump endurable and have more efficiency, the present invention has arisen to mitigate and/or obviate the disadvantages of the conventional vane cases.

SUMMARY OF THE INVENTION

[0015] The main objective of the present invention is to provide a spiral fluted wheel for a water pump that can be combined rapidly and precisely.

[0016] Another objective of the present invention is to provide a spiral fluted wheel for a water pump that is firm and endurable.

[0017] Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0018] FIG. 1 is an exploded perspective view of a spiral fluted wheel for a water pump in accordance with the present invention;

[0019] FIG. 2 is a top cross-sectional view of the spiral fluted wheel for a water pump in assembly in accordance with FIG. 1;

[0020] FIG. 3 is a cross-sectional view of the spiral fluted wheel for a water pump along line 3-3 in FIG. 2;

[0021] FIG. 4 is a cross-sectional side view of a water pump with conventional multiple vane cases;

[0022] FIG. 5 is a side cross-sectional view of the vane cases and the guide cases in combination; and

[0023] FIG. 6 is an exploded perspective view of the vane case in accordance with FIG. 4.

DETAILED DESCRIPTION OF THE INVENTION

[0024] With reference to FIG. 1, a spiral fluted wheel (10) for a water pump in accordance with the present invention comprises a first plate (11), a second plate (12), and multiple spiral blades (20).

[0025] The first plate (11) of the spiral fluted wheel (10) is a round plate and a lock hole (110) is defined in the center of the first plate (11). The lock hole (110) is adapted to be firmly secured on an axle tube of the water pump to make the spiral fluted wheel (10) rotate with the axle tube when the axle tube rotates.

[0026] The second plate (12) of the spiral fluted wheel (10) is a round plate the same size as the first plate (11) and an inlet aperture (120) is defined in the center of the second plate (12). The inlet aperture (120) has larger diameter than a diameter of the axle tube to leave some space between the second plate and the axle tube for entry of water into the spiral fluted wheel (10).

[0027] The multiple spiral blades (20) are combined together to form a sandwich layer with a plurality of channels between the first plate (11) and the second plate (12).

[0028] In FIG. 1, each spiral blade (20) is partially spiral-shaped and a spiral channel (21) is defined in a middle portion of the spiral blade (20). The spiral blade (20) has a flat bottom (201) and two opposite thin side-walls (203) erected on the flat bottom (201) to construct and surround the spiral channel (21). Additionally, each side-wall (203) has a wedge (23) extending laterally and outwardly from a top of the side wall (203). Width of the wedge (23) is half a width of the flat bottom (201).

[0029] The flat bottom (201) of the spiral blade (20) is welded to an upper face of the second plate (12) and top faces of the wedges (23) are welded to a lower face of the first plate (11) to form the sandwich layer between the first plate (11) and the second plate (12).

[0030] Now referring to FIGS. 2 and 3, when the multiple spiral blades (20) are composed together, the wedges (23) of one spiral blade (20) are matched up to the wedges (23) of adjacent spiral blades (20) to form sub-channels (25) between the combined spiral blades (20). Because the width of the wedges (23) is half of width of the flat bottom (201), the sub-channel (25) composed of two adjacent wedges (23) is the same width with the spiral channel (21). Therefore, three blades (20) can form three spiral channels (21) and three sub-channels (25).

[0031] According to the above description, several advantages are discovered and listed as following:

[0032] 1. Excellent Endurance:

[0033] Because the spiral blades (20) are combined by welding the flat bottom (201) and the wedge (23) respectively to the first plate (11) and the second plate (12), a contact area of the spiral blade (20) is large whereby the spiral blades (20) are secure and the spiral fluted wheel (10) is strong and endurable.

[0034] 2. Convenient in Combination:

[0035] The multiple spiral blades (20) have normal sizes, thicknesses, and certain channels defined therein. Therefore, the spiral blades (20) only need to be put together to form the complete sandwich layer. Shapes of the spiral fluted wheel (10), the spiral channels (21), and the sub-channels (25) are precise to ensure that the water inside the spiral fluted wheel (10) flows fluently.

[0036] Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.

Claims

1. A spiral fluted wheel for a pump adapted to be secured on a rotating device, and the spiral fluted wheel (10) comprising:

a first plate (11) having a lock hole (110) defined in a center of the first plate (11), and a periphery defining the lock hole (110) adapted to be firmly secured on a rotating device;

a second plate (12) corresponding to the first plate (11) and having an inlet aperture (120) defined in a center of the second plate (12) for entry of water into the spiral fluted wheel (10); and

multiple spiral blades (20) sandwiched between the first plate (11) and the second plate (12), each spiral blade (20) having a spiral channel (21) defined therein and forming a sub-channel (25) with an adjacent spiral blade (20) whereby in operation the spiral fluted wheel is driven to rotate by the rotating device and water travels into the spiral fluted wheel via the inlet aperture and is centrifugally driven outwardly along the spiral channel and sub channel.

2. The spiral fluted wheel for a pump as claimed in claim 1, wherein each spiral blade has two wedges (23) extending respectively outwardly from the spiral blade (20), each wedge (23) complemented with other wedge (23) of adjacent spiral blades so as to form the sub-channel (25).