CN111907675A - Short-term high-thrust water-jet propulsion pump device with external jet and method of using the same - Google Patents

Abstract

The invention relates to a short-term high-thrust water-jet propulsion pump device with an external jet and a method for using the same, including a short-term high-thrust water-jet propulsion pump device mounted on a single-nozzle water-jet propulsion pump device, and a short-term high-thrust water-jet propulsion pump device. The propulsion pump device includes a centrifugal pump, and the centrifugal pump is provided with a centrifugal pump water outlet and a centrifugal pump water inlet; the centrifugal pump water outlet is externally connected with a reducing pipe, one end of the reducing pipe is connected with the centrifugal pump water outlet, and the other end is connected with a Horizontal pipe, and the diameter of the reducer gradually decreases from the end connecting the reducer and the centrifugal pump outlet to the end connecting with the horizontal pipe; one end of the equal diameter elbow is connected to the equal diameter elbow, and the other end passes through any guide. The blades enter the interior of the impeller and extend to the guide vane outlet water guide cone through the impeller; the present invention increases the flow and The flow rate increases the short-term thrust of the original pump device and realizes the instantaneous high-speed sailing of the ship.

Description

Short-term high-thrust water-jet propulsion pump device with external jet and method of using the same

technical field

The invention relates to a short-term high-thrust water-jet propulsion pump device with an external jet and a method for using the same, belonging to the field of ship engineering.

Background technique

The water jet propulsion ship is different from the propeller propulsion ship, it has the advantages of simple transmission mechanism, low underwater noise and good maneuverability. However, due to factors such as social development needs and the improvement of people's living standards, there are still many deficiencies in the research and design of the existing water jet propulsion pump devices in terms of speed, efficiency, applicability, etc., and its performance needs to be further improved. Existing technology cannot achieve large thrust and short-term increase in ship speed when the grounding escapes and instantaneous acceleration.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a short-term high-thrust water-jet propulsion pump device with an external jet and a method of using the same in view of the above-mentioned existing problems.

The purpose of the present invention is achieved in this way,

A short-term high-thrust water-jet propulsion pump device with external jet flow, comprising a short-term high-thrust water-jet propulsion pump device installed on a single-nozzle water-jet propulsion pump device, the short-term high-thrust water-jet propulsion pump device comprising a centrifugal pump, The centrifugal pump is provided with a centrifugal pump water outlet and a centrifugal pump water inlet; it is characterized by:

The single nozzle water jet propulsion pump device includes a motor and a water jet propulsion pump body. One end of the water jet propulsion pump body is provided with a water inlet, and the other end is provided with a nozzle. The water inlet, the water jet propulsion pump body and the nozzle are in sequence. The power output shaft of the motor extends in the pump body of the water jet propulsion pump, and the end of the power output shaft of the motor placed in the pump body of the water jet propulsion pump is fixed with several blades; the water jet propulsion pump body is provided with an impeller, and the impeller There are several guide vanes on it, the impeller is fixed in the pump body of the water jet propulsion pump, and there is a gap between the impeller and the nozzle, and there is a gap between the impeller and several blades, and the end of the impeller near the nozzle is provided with a guide vane outlet water guide cone; when starting the motor , the rotation of the motor power output shaft drives a number of blades to rotate, the water flows in from the water inlet, and is ejected through the water inlet, the water jet propulsion pump body, and the nozzle in turn;

The centrifugal pump water outlet is externally connected with a reducing pipe, one end of the reducing pipe is connected with the centrifugal pump water outlet, and the other end is connected with a horizontal pipe, and the pipe diameter of the reducing pipe is connected from the reducing pipe to the centrifugal pump water outlet One end becomes smaller toward the end connected to the horizontal pipe;

One end of the horizontal pipe is connected with the reducing pipe, and the other end is connected with an equal-diameter elbow; one end of the equal-diameter elbow is connected with the horizontal pipe, and the other end is connected with an equal-diameter oblique straight pipe; the equal-diameter oblique straight pipe One end is connected with an equal diameter elbow, and the other end is connected with an equal diameter elbow;

Centrifugal pump water outlet, reducing pipe, horizontal pipe, equal diameter elbow, equal diameter oblique straight pipe, equal diameter elbow are connected in sequence;

One end of the equal-diameter elbow is connected with the equal-diameter elbow, and the other end enters the impeller through any guide vane, and extends to the guide vane outlet water guide cone through the impeller, and the gap between the equal-diameter elbow, the impeller and the nozzle through.

The equal diameter elbow is an equal diameter elbow at 45°.

The diameter of the water outlet of the centrifugal pump is 0.4 times the diameter of the nozzle of the single nozzle water jet propulsion pump device;

The diameter of the horizontal pipe is 0.1 times the diameter of the nozzle of the single nozzle water jet propulsion pump device;

The thickness of the guide vane is 0.12 times the diameter of the nozzle of the single nozzle water jet propulsion pump device.

A method for using a short-time high-thrust water-jet propulsion pump device with an external jet, characterized in that:

Under normal circumstances, the single-nozzle water-jet propulsion pump device is activated, and the single-nozzle water-jet propulsion pump device sucks in water and ejects it from the nozzle of the single-nozzle water-jet propulsion pump device;

When it is necessary to increase the thrust for a short time, start the centrifugal pump, the water enters the centrifugal pump from the water inlet of the centrifugal pump, and passes through the reducing pipe, horizontal pipe, equal-diameter elbow, equal-diameter oblique straight pipe, and equal-diameter elbow in turn through the centrifugal pump water outlet. The tube flows to the nozzle of the single nozzle water jet propulsion pump unit and is ejected through the nozzle, thereby increasing the thrust.

The present invention has reasonable structure and advanced scientific method. Through the present invention, the technical problem that the thrust provided by the original water jet propulsion pump device cannot be increased in a short time is mainly solved, the instantaneous thrust of the whole device is improved, and the short-term speed of the ship is increased. The core purpose of this patent is to design and invent a short-term high-thrust water-jet propulsion pump device with an external jet. A short-term high-thrust water jet propulsion pump device with an external jet, which is connected with a reducer tube from the water outlet of the centrifugal pump (the diameter is 0.4 times the diameter of the nozzle), followed by a horizontal tube (the diameter is 0.1 times the diameter of the nozzle) , followed by an equal-diameter elbow at 45° to the horizontal plane, followed by an equal-diameter oblique straight tube, passing through one of the guide vanes and entering the interior of the impeller, followed by an equal-diameter elbow and spraying from the guide vane outlet water guide cone The water flow can realize a short-term increase in thrust. The thickness of the guide vane passing through the inclined straight tube is 1.2 times the diameter of the nozzle (the thickness can be adjusted according to the actual situation), and the shape is similar to other guide vanes. The water is sucked from the hull by a small centrifugal pump with auxiliary equipment, and the water flows through the centrifugal pump water outlet, reducing pipe, horizontal pipe, equal-diameter elbow, equal-diameter oblique straight pipe, and equal-diameter elbow, and is ejected from the guide cone at the outlet of the guide vane. The water flow and the water flow at the original single-nozzle water jet propulsion pump unit combine to eject the water flow, which increases the flow and flow velocity at the nozzle of the original water jet propulsion pump device, and realizes the short-term high-thrust navigation requirements of the ship.

The working principle of the device: without considering the loss everywhere, the ideal thrust T _i should be equal to the increment of momentum per unit time: T _i =ρQ(V _i -V ₀ ). The device increases the flow rate and flow rate ejected from the final nozzle, thereby increasing the short-term thrust and realizing the instantaneous high-speed sailing of the ship.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

FIG. 2 is a schematic structural diagram of the present invention in another direction.

FIG. 3 is a schematic structural diagram of the present invention in another direction.

In the picture: 1 centrifugal pump water outlet, 2 reducing pipe, 3 horizontal pipe, 4 equal diameter elbow, 5 equal diameter inclined straight pipe, 6 guide vane, 7 impeller, 8 equal diameter elbow, 9 guide vane outlet water guide Cone, 10 motors, 11 blades.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and the description of the accompanying drawings.

A short-term high-thrust water-jet propulsion pump device with external jet flow, comprising a short-term high-thrust water-jet propulsion pump device installed on a single-nozzle water-jet propulsion pump device, the short-term high-thrust water-jet propulsion pump device comprising a centrifugal pump, The centrifugal pump is provided with a centrifugal pump water outlet 1 and a centrifugal pump water inlet; the single-jet water jet propulsion pump device includes a motor 10, a water jet propulsion pump body, and one end of the water jet propulsion pump body is provided with a water inlet, and the other is provided with a water inlet. One end is provided with a spout, the water inlet, the water jet propulsion pump body and the spout are connected in sequence, the power output shaft of the motor extends in the water jet propulsion pump body, and the motor power output shaft is fixed at one end of the water jet propulsion pump body There are several blades 11; the water jet propulsion pump is provided with an impeller 7, the impeller 7 is provided with a number of guide vanes 6, the impeller 7 is fixed in the water jet propulsion pump pump body, and the impeller 7 and the nozzle leave a gap, and the impeller 7 and several The blade 11 has a gap, and the end of the impeller 7 close to the spout is provided with a guide vane outlet water guide cone 9; when the motor 10 is started, the motor power output shaft rotates to drive a number of blades to rotate, and the water flows in from the water inlet, and passes through the water inlet and spray water in turn. Push the pump body and spout out.

A reducer 2 is connected externally at the centrifugal pump outlet 1, one end of the reducer 2 is connected to the centrifugal pump outlet 1, and the other end is connected with a horizontal pipe 3, and the diameter of the reducer 2 is from the reducer 2 One end connected with the centrifugal pump water outlet 1 gradually decreases toward the end connected with the horizontal pipe 3; one end of the horizontal pipe 3 is connected with the reducing pipe 2, and the other end is connected with an equal-diameter elbow 4; one end of the equal-diameter elbow 4 is connected with the horizontal pipe 3 is connected, and the other end is connected with an equal-diameter oblique straight pipe 5; one end of the equal-diameter oblique straight pipe 5 is connected with an equal-diameter elbow 4, and the other end is connected with an equal-diameter elbow 8; centrifugal pump water outlet 1, reducing pipe 2. Horizontal pipe 3, equal-diameter elbow 4, equal-diameter oblique straight pipe 5, and equal-diameter elbow 8 are connected in turn; one end of equal-diameter elbow 8 is connected to equal-diameter elbow 8, and the other end passes through any guide vane 6 enters the interior of the impeller 7, and extends through the impeller 7 to the guide vane outlet water guide cone 9, and the gap between the equal diameter elbow 8 and the impeller 7 and the spout passes through.

Further, the equal-diameter elbow 4 is an equal-diameter elbow at 45°. The diameter of the centrifugal pump water outlet 1 is 0.4 times the diameter of the nozzle of the single nozzle water jet propulsion pump device; the diameter of the horizontal pipe 3 is 0.1 times the nozzle diameter of the single nozzle water jet propulsion pump device; the thickness of the guide vane 6 is the single nozzle nozzle. 0.12 times the diameter of the nozzle of the water propulsion pump device.

When in use, under normal circumstances, the single-nozzle water-jet propulsion pump device is activated, and the single-nozzle water-jet propulsion pump device sucks water and ejects it from the nozzle of the single-nozzle water-jet propulsion pump device;

When it is necessary to increase the thrust for a short time, start the centrifugal pump, the water enters the centrifugal pump from the water inlet of the centrifugal pump, and passes through the reducing pipe 2, the horizontal pipe 3, the equal-diameter elbow 4, and the equal-diameter inclined straight pipe through the centrifugal pump outlet 1 in turn. 5. The equal-diameter elbow 8 flows to the nozzle of the single nozzle water jet propulsion pump device, and is ejected through the nozzle, thereby increasing the thrust.

Claims (5)

1. A short-time high-thrust water jet propulsion pump device externally connected with jet flow comprises a short-time high-thrust water jet propulsion pump device arranged on a single-nozzle water jet propulsion pump device, wherein the short-time high-thrust water jet propulsion pump device comprises a centrifugal pump, and a centrifugal pump water outlet (1) and a centrifugal pump water inlet are arranged on the centrifugal pump; the method is characterized in that:

the single-nozzle water jet propulsion pump device comprises a motor (10) and a water jet propulsion pump body, wherein a water inlet is formed in one end of the water jet propulsion pump body, a nozzle is formed in the other end of the water jet propulsion pump body, the water inlet, the water jet propulsion pump body and the nozzle are sequentially communicated, a power output shaft of the motor extends into the water jet propulsion pump body, and a plurality of blades (11) are fixed at one end, arranged in the water jet propulsion pump body, of the power output shaft of the motor; an impeller (7) is arranged in the water jet propulsion pump body, a plurality of guide vanes (6) are arranged on the impeller (7), the impeller (7) is fixed in the water jet propulsion pump body, a gap is reserved between the impeller (7) and the nozzle, a gap is reserved between the impeller (7) and the plurality of vanes (11), and a guide vane outlet water guide cone (9) is arranged at one end, close to the nozzle, of the impeller (7); when the motor is started, the power output shaft of the motor rotates to drive the blades to rotate, and water flows in from the water inlet and is sprayed out through the water inlet, the water spray propulsion pump body and the nozzle in sequence;

a reducer (2) is externally connected to the water outlet (1) of the centrifugal pump, one end of the reducer (2) is connected with the water outlet (1) of the centrifugal pump, the other end of the reducer is connected with a horizontal pipe (3), and the pipe diameter of the reducer (2) is gradually reduced from the end, connected with the water outlet (1) of the centrifugal pump, of the reducer (2) to the end, connected with the horizontal pipe (3);

one end of the horizontal pipe (3) is connected with the reducing pipe (2), and the other end of the horizontal pipe is connected with the equal-diameter bent pipe (4); one end of the equal-diameter bent pipe (4) is connected with the horizontal pipe (3), and the other end of the equal-diameter bent pipe is connected with the equal-diameter inclined straight pipe (5); one end of the equal-diameter inclined straight pipe (5) is connected with the equal-diameter bent pipe (4), and the other end of the equal-diameter inclined straight pipe is connected with the equal-diameter bent pipe (8);

the water outlet (1) of the centrifugal pump, the reducing pipe (2), the horizontal pipe (3), the equal-diameter bent pipe (4), the equal-diameter inclined straight pipe (5) and the equal-diameter bent pipe (8) are sequentially communicated and connected;

one end of the equal-diameter bent pipe (8) is connected with the equal-diameter inclined straight pipe (5), the other end of the equal-diameter bent pipe penetrates through any guide vane (6) to enter the impeller (7) and extend to the guide vane outlet water guide cone (9) through the impeller (7), and gaps between the equal-diameter bent pipe (8) and the impeller (7) and between the equal-diameter bent pipe and the nozzle are communicated.

2. The short-term high-thrust jet propulsion pump device with external jet flow as claimed in claim 1, wherein: the equal-diameter bent pipe (4) is a 45-degree equal-diameter bent pipe.

3. The short-term high-thrust jet propulsion pump device with external jet flow as claimed in claim 1, wherein: the diameter of the water outlet (1) of the centrifugal pump is 0.4 times of the diameter of the nozzle of the single-nozzle water jet propulsion pump device;

the diameter of the horizontal pipe (3) is 0.1 time of the diameter of the nozzle of the single-nozzle water jet propulsion pump device.

4. The short-term high-thrust jet propulsion pump device with external jet flow as claimed in claim 1, wherein: the thickness of the guide vane (6) is 0.12 times of the diameter of the nozzle of the single-nozzle water jet propulsion pump device.

5. The use method of the short-time high-thrust water jet propulsion pump device externally connected with jet flow, which is characterized by comprising the following steps of:

under normal conditions, starting the single-nozzle water jet propulsion pump device, and sucking water into the single-nozzle water jet propulsion pump device and spraying the water out of a nozzle of the single-nozzle water jet propulsion pump device;

when thrust is needed to be increased for a short time, the centrifugal pump is started, water enters the centrifugal pump from the water inlet of the centrifugal pump, flows to the nozzle of the single-nozzle water jet propulsion pump device through the reducing pipe (2), the horizontal pipe (3), the equal-diameter bent pipe (4), the equal-diameter inclined straight pipe (5) and the equal-diameter bent pipe (8) in sequence and is sprayed out through the nozzle, and therefore the thrust is increased.

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