MXPA97007895A - Motor motor propulsor system stator - Google Patents

Abstract

A motor-driven propulsion system is composed of a water flow channel in which a propeller and a stator are located. The channel is provided at an initial end thereof with a water inlet and at a trailing end thereof with a propeller nozzle. The stator has an axial portion divided into an anterior section adjacent to the propeller and a subsequent section adjacent to the nozzle. The previous section has an outer diameter that becomes progressively smaller toward one end thereof adjacent to the propeller, while the rear section has an outer diameter that gradually becomes smaller towards one end thereof adjacent to the propelled nozzle

Description

MOTOR PROPULSOR SYSTEM STATOR SMALL FIELD OF THE INVENTION The present invention relates generally to a motor propeller system, and more particularly to a stator of a motor propeller system. BACKGROUND OF THE INVENTION As shown in FIG. 1, the conventional propulsion system of a small bus is generally composed of a helmet 10, a motor 12 housed in the hull 10, an arrow 13 driven by the engine 12, a channel 11 located in the hull 10, in such a way that a The end of the arrow 13 extends towards the interior of the channel 11, an impeller 14 attached to the arrow 13, and a stator 15, located in the channel 11 and behind the impeller 14. The stator 15 has an axial portion 151 and a plurality of guide vanes 152 mounted on the axial portion 151. The arrow 13 is driven by the motor 12 to drive the impeller 14 to compress the water stream in the channel 11. As the stream of the water swirl is allowed to pass to the stator 15, the eddy current is changed to move forward linearly and rapidly towards the nozzle 111, such that a powerful pulse is generated to propel the channel 10. In order to improve the impulse effect of the nozzle 111, the nozzle 111 tie ne funnel shape, such that its internal area in cross section is reduced, and is able to accelerate the flow velocity of the water stream in accordance with the Bernoulli equation. However, it should be noted that the nozzle 111 of the conventional thrust system described above is limited in its design and practical application in the bus. In other words, when the nozzle 111 is shortened in view of design consideration, the inner wall of the shortened nozzle 111 is very vulnerable to the severe impact of the water stream. On the other hand, when the nozzle 111 is lengthened, the overall length of the channel 10 must be increased accordingly, to accommodate the elongated nozzle 111. SUMMARY OF THE INVENTION Therefore, it is the main object of the present invention to provide a self-propelled propulsion system with a stator capable of improving the thrust effect of the propeller system without having to redesign the water channel and the nozzle of the propeller system of autobote. It is another object of the present invention to provide a self-propelling system with a stator capable of inducing an acceleration of the water flow in the water channel of the motor-propeller system. Following the principle of the present invention, the above objectives of the present invention are achieved by means of a stator, which is located in the channel of the propeller system and is provided in the axial portion thereof, with an anterior section and a posterior section . The previous section acquires a larger diameter and progressively from one end to the other end of it. The posterior section decreases in diameter and progressively from one end to the other end thereof. The anterior section and the posterior section are connected in such a way that the portions with greater diameters of the anterior section and the posterior section meet, and that the water flow space located between the inner wall of the canal and the outer wall of the canal. The stator decreases progressively from one end to the other, in such a way that the acceleration range of the water current passing through the outer wall of the stator is lengthened to promote the thrust effect of the propulsion system that is in the channel of the bus The objects, features, functions and advantages of the present invention will be more readily understood after a deliberate deliberation of the following detailed description of the embodiment of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a schematic view of a prior art bus propulsion system. FIG. 2 shows a schematic sectional view of a preferred embodiment of the present invention.

FIG. 3 shows another schematic sectional view of a preferred embodiment of the present invention. FIG. 4 shows a comparison of the present invention with the prior art as shown in FIG.l. DETAILED DESCRIPTION OF THE INVENTION As shown in FIGS. 2 and 3, it is intended that a self propeller system of the present invention cooperate with a channel 40 of a power bus (not shown in the drawing). The channel 40 has one end extending to reach the bottom of the bus channel to form an inlet 41, and another end extending to reach the end of the channel to form a channelized nozzle 43. Located between the inlet 41 and the nozzle 43 there is a straight middle segment 42 of the channel 40. The motor-driven propulsion system comprises a motor (not shown in the drawing), an arrow 30 having one end driven by the motor and having another end extending to reach the middle segment 42 of the channel 40, a propeller 32 connected to the rear end of the arrow 30, and a stator 60 located in the middle segment 42 and the nozzle 43 to guide the water stream. The stator 60 has an axial portion 62 and several guide vanes 64 of curved manufacture. In operation, the propeller 32 is driven by the arrow 30 which is driven by the engine. The moving propeller compresses the water stream in the channel 40. The compressed water is then allowed to pass through the stator 60 for correction of the direction in which the water flows. The thrust is generated at the moment when the water is discharged through the nozzle 43. The autobote is propelled by the thrust. The axial portion 62 of the stator 60 consists of an anterior section 621 and a posterior section 622. The anterior section 621 is located in the middle segment 42 of the channel 40, while the posterior section 622 is located in the mouthpiece. The anterior section 621 is tapered such that the open space formed between the inner wall of the channel 40 and the outer wall of the anterior section 621 becomes progressively smaller toward the rear section 622, which has an outer diameter that gradually becomes smaller towards the nozzle 43. In other words, the joint, in which the anterior section 621 and the posterior section 622 meet, has the largest outside diameter. As illustrated in FIG. 4, the autobot propulsion system provided with the stator 60 of the present invention is more efficient than the autobot propulsion system provided with the stator of the prior art. In other words, the thrust "S" generated by the present invention is greater than the thrust "S1" generated by the prior art, in view of the fact that the velocity of the water stream of the nozzle "V2" of the present invention is greater than the water stream of the nozzle "V'2" of the prior art. The propeller 322 and the stator 60 effectively accelerate the flow velocity of the water stream in the channel 40 from the point (A) of the middle segment 42 of the anterior section 621 to the point (B) of the nozzle 43, as illustrated in FIG. 3. According to the Bernoulli equation, the effect of the present invention can be expressed in terms of the equation, V22 = V12 + 2 a s, where V2 is the velocity of the water stream of the nozzle; Vl the initial velocity flow of the water stream entering the middle segment 42 of the channel 40; a, the acceleration effected in the water stream by the moving propeller; and s, the acceleration range of the water stream. As shown in FIG. 4, the initial flow velocity V_ ^ and the present invention is the same as the initial flow velocity V_ of the prior art. However, the stator 60 of the present invention increases the flow velocity of the water stream, such that the flow velocity V2 at the point (B) of the nozzle 43 of the present invention is greater than the velocity of the flow. flow V2 * of the prior art. As a result, the thrust S generated by the present invention is greater than the thrust S1 caused by the propulsion system of the prior art. Without modifying the stator of the prior art, the effort made to modify the construction of the nozzle to achieve the similar result of the present invention is in fact technically unfeasible. For example, a reduction of the inner diameter of the outer end of the nozzle may result in a reduction in thrust, in view of the fact that the water stream is somewhat obstructed by the steep inner wall of the smaller sized nozzle. As shown in FIG. 3, the stator 60 of the present invention is located in the channel 40 through a frame 66, which is able to securely hold the axial portion 62 of the stator 60 in the axial area of the channel 40. In other words, the frame 66 it is in effect an integral part of the channel 40. The guide vanes 64 are integrally manufactured with the frame 66, in such a way that they correspond in location with the anterior section 621 of the axial portion 62 of the stator 60. The embodiment of the The present invention described above should be considered, in all aspects, as merely illustrative and not restrictive. Accordingly, the present invention can acquire other specific embodiments without deviating from the spirit of the same. The present invention, therefore, should be limited only by the scope of the following appended claims.

Claims (3)

1. Having described the foregoing invention, the following CLAIMS are declared to be property. A fuel propeller system comprising: a water stream channel located in a motor channel, such that the water stream channel is provided in a initial end thereof with a water inlet and at a final end with a nozzle; an engine provided with an arrow connected thereto, such that the arrow is driven by the motor, and a free end of the arrow is located in the water flow channel; a propeller connected to the free end of the arrow to impel the stream of water entering the water flow channel through the water inlet; and a stator secured in the water flow channel, in such a way that the stator is located between the impeller and the nozzle, and that the stator and an inner wall of the channel form between them an open space through which the flow of current can pass. Water; wherein the stator has an axial portion, which is divided into an anterior section adjacent to the propeller and a subsequent section adjacent to the nozzle, the front section having an outer diameter that becomes progressively smaller towards one end thereof adjacent to the propeller, while the rear section has an outer diameter that becomes progressively smaller towards one end thereof adjacent to the nozzle.
2. 2. The sprinkler system as defined in claim 1, wherein the water stream channel is provided with a frame manufactured integrally therewith, such that the frame has several guide vanes; and wherein the stator is secured in the water flow channel such that it is located next to the guide vanes of the frame.
3. 3. The motor propeller system as defined in claim 2, wherein the stator is located next to the frame, such that the front section of the stator is secured by the guide vanes of the frame. PROPULSOR SYSTEM OF MOTOR BOAT SMALL EXTRACT OF THE INVENTION A propellant system is composed of a water current channel in which a propeller and a stator are located. The channel is provided at an initial end thereof with a water inlet and at a trailing end thereof with a propeller nozzle. The stator has an axial portion divided into an anterior section adjacent to the propeller and a subsequent section adjacent to the nozzle. The previous section has an outer diameter that becomes progressively smaller towards one end thereof adjacent to the propeller, while the rear section has an outer diameter that gradually becomes smaller towards one end thereof adjacent to the propelling nozzle.