Low pressure jet engine

Abstract

The present application discloses a low-pressure jet engine, including a stator and a rotor; a first cavity and a second cavity are provided inside the stator; and the rotor includes an output shaft, an air jet pipe and an air intake shaft. Since the stator is provided with two cavities, the rotor is installed in the internal cavity of the stator, and the air jet pipe in the rotor is provided with an expansion cavity that changes from small to large and an injection cavity that changes from large to small, so that low-temperature steam first decompresses and expands after entering the air jet pipe, and the expanded low-pressure steam is then compressed and ejected from the air jet nozzles around the air jet pipe along the tangential direction to another cavity of the stator. The jet force of the air jet nozzle and the pressure difference between the two cavities in the stator will accelerate the rotation of the rotor, so that the low-pressure jet engine can drive the output shaft to output work by introducing low-quality media such as low-temperature steam, and the low-quality media can be recycled to save energy.

Description

Technical Field

[0001] The present application relates to a power device, in particular to a low-pressure jet power machine. Background Art

[0002] At present, the main thermal power generation driving equipment is steam turbine, gas turbine, piston internal combustion engine, etc., the primary conversion efficiency is generally between 20% and 40%, and the required medium (steam or gas, etc.) is of high quality, and the system structure is relatively complex, but the above-mentioned various types of power generation devices are very mature and widely used in different occasions. However, low-quality media, such as low-temperature steam, cannot be used because it cannot drive the existing power machine, resulting in direct discharge of low-temperature steam, which wastes energy. Summary of the invention

[0003] The present application provides a low-pressure jet power machine which can be driven by a low-quality medium.

[0004] In one embodiment, a low-pressure jet power machine is provided, comprising a stator and a rotor;

[0005] A first cavity and a second cavity are provided inside the stator, the first cavity is located in the middle, the second cavity is arranged around the first cavity, an annular vent is provided between the first cavity and the second cavity, and the second cavity is provided with an exhaust port connected to the outside;

[0006] The rotor comprises an output shaft, an air jet pipe and an air intake shaft, wherein the output shaft and the air intake shaft are located at two ends of the air jet pipe, one end of the air jet pipe is provided with an air inlet, and the other end is a closed end, a plurality of air jet nozzles evenly distributed and tangent to the circumferential surface are provided on the side wall of the closed end, an expansion chamber and an injection chamber connected along the air intake direction are provided in the air jet pipe, the expansion chamber is gradually expanded, the injection chamber is differentiated and gradually reduced in all directions, the small opening of the expansion chamber is connected to the air inlet, and the reduced end of the injection chamber is connected to the air jet nozzle; the rotor is rotatably mounted on the stator through the output shaft and the air intake shaft, the air jet pipe is located in the first cavity, and the air jet nozzle of the air jet pipe is arranged opposite to the air vent between the first cavity and the second cavity.

[0007] Furthermore, the jet pipe includes a conical tube and a straight tube, the straight tube is connected to the large mouth end of the conical tube, a gradually expanding expansion chamber is provided inside the conical tube, the end of the straight tube is sealed, and an air guide head is provided on the inner side of the closed end, the air guide head extends toward the conical tube with an outer diameter gradually decreasing, and the straight tube and the internal air guide head form a jet chamber that gradually decreases from the middle to the surrounding areas; the air inlet of the jet pipe is arranged on the conical tube, and the jet nozzle of the jet pipe is arranged on the side wall of the straight tube.

[0008] Furthermore, the air jet nozzle is arranged to be gradually reduced along the air jet direction.

[0009] Furthermore, the annular vent between the first cavity and the second cavity is covered with side-by-side shutters.

[0010] Furthermore, the blades of the louver are arranged to be deflected at a preset angle along the axial direction of the air jet pipe, so that the blades of the louver are opposite to the airflow ejected from the air jet nozzle to form an injection support.

[0011] Furthermore, there are three air nozzles evenly distributed on the circumference of the air injection pipe.

[0012] Furthermore, the output shaft and the intake shaft are rotatably mounted on the stator via bearings respectively.

[0013] Furthermore, the outer wall of the straight tube is close to the inner wall of the first cavity, and there is a gap for rotation between the two.

[0014] Furthermore, the power machine also includes an intake pipe, and the intake shaft of the rotor is rotatably connected to the outlet of the intake pipe.

[0015] Furthermore, the air inlet shaft of the rotor is connected to the air outlet of the air inlet pipe through a rotary joint.

[0016] According to the low-pressure jet engine of the above embodiment, since the stator is provided with two cavities, the rotor is installed in the internal cavity of the stator, and the jet pipe in the rotor is provided with an expansion cavity that changes from small to large and a jet cavity that changes from large to small, so that the low-temperature steam is first decompressed and expanded after entering the jet pipe, and the expanded low-pressure steam is then compressed and ejected from the jet nozzles around the jet pipe along the tangential direction into another cavity of the stator. The jet force of the jet nozzle and the pressure difference between the two cavities in the stator will accelerate the rotation of the rotor, so that the low-pressure jet engine can drive the output shaft to output work by introducing low-quality media such as low-temperature steam, and the low-quality media can be recycled to save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is an axial cross-sectional view of a low-pressure jet power machine in one embodiment;

[0018] Figure 2 A radial cross-sectional view of a low-pressure jet engine in one embodiment;

[0019] The figures are marked as follows: 1-stator, 11-first cavity, 12-second cavity, 13-louver, 2-rotor, 21-output shaft, 22-injection pipe, 221-expansion chamber, 222 injection chamber, 223-air guide head, 224-injection nozzle, 23-intake shaft, 3-bearing, 4-intake pipe, 5-rotary joint. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0021] This embodiment provides a low-pressure jet engine, which is mainly designed for low-temperature steam drive. The driving medium can also use other low-quality media such as non-water vapor or compressed air. Of course, this engine is suitable for high-quality media such as high-temperature steam.

[0022] like Figure 1 and Figure 2 As shown, the low-pressure jet engine provided in this embodiment mainly includes a stator 1 and a rotor 2. The stator 1 is used for installation and fixation, and the rotor 2 is rotatably installed on the stator 1. One end of the rotor 2 is for air intake, and the other end is an output shaft.

[0023] Specifically, the interior of the stator 1 is provided with a first cavity 11 and a second cavity 12. As shown in the figure, the upper end of the first cavity 11 is a truncated cone cavity, and the lower end is a cylindrical cavity, and the midlines of the upper and lower cavities are aligned. The second cavity 12 surrounds the first cavity 11, that is, the first cavity 11 and the second cavity 12 are separated by a partition, and an annular vent is provided at the lower end between the first cavity 11 and the second cavity 12, so that the first cavity 11 and the second cavity 12 are connected. The second cavity 12 is a collection cavity, and is provided with an exhaust port 121, which is connected to the outside world and is used to discharge the used steam out of the power machine.

[0024] In other embodiments, the exhaust port 121 may be connected to other equipment, such as a gas collection device, through a pipeline to collect and recycle the used gas for reuse.

[0025] In this embodiment, the rotor 2 includes an output shaft 21, an air injection pipe 22 and an air intake shaft 23. The output shaft 21, the air injection pipe 22 and the air intake shaft 23 may be an integrated structure or fixed together by welding.

[0026] The rotor 2 is rotatably mounted on the stator 1 through the output shaft 21 and the intake shaft 23. Preferably, bearings 3 are embedded and mounted on the upper and lower side walls of the first cavity 11 of the stator 1. The output shaft 21 and the intake shaft 23 of the rotor 2 are respectively mounted on the bearings 3, and the output shaft 21 and the intake shaft 23 respectively pass through the bearings 3 and are exposed outside the stator 1. The output shaft 21 is used to output power, and the intake shaft 23 is a pipe shaft with an intake hole. The jet pipe 22 of the rotor 2 is located in the first cavity 11 as a whole.

[0027] The jet pipe 22 is a Laval jet pipe, which is formed by splicing a conical pipe and a straight pipe. The conical pipe has an expansion chamber 221 in a truncated cone structure. The small end of the expansion chamber 221 (the upper end shown in the figure) is connected to the air inlet of the air inlet shaft 23, and the expansion chamber 221 gradually expands along the air flow direction. The upper end of the straight pipe is connected to the lower end of the conical pipe, and the lower end of the straight pipe is a closed end. A gas guide head 233 is provided on the inner side of the closed end. The gas guide head 233 extends from the end toward the conical pipe (upward in the figure), and the gas guide head 233 extends upward from the end circular surface of the straight pipe, so that the straight pipe and the gas guide head 233 enclose a jet chamber 222 that gradually decreases in size toward the surroundings, and the jet chamber 222 and the expansion chamber 221 are a connected cavity.

[0028] Three evenly distributed air nozzles 224 are arranged on the circumference of the side wall of the closed end of the straight tube (the lower end shown in the figure), and the air nozzles 224 are opposite to the annular vent between the first cavity 11 and the second cavity 12, so that the gas ejected by the air nozzles 224 can be discharged into the second cavity 12. The air nozzles 224 are arranged along the tangential direction, so that the airflow is ejected along the tangential direction of the outer circumference of the air jet pipe 22 to increase the driving force. The air jet pipe 22 is gradually narrowed along the airflow ejection direction to increase the ejection force of the airflow.

[0029] The size of the jet pipe 22 is determined by the intake pressure and the temperature of the condensation chamber (the second cavity 12). The higher the intake pressure, the lower the condensation chamber temperature, the longer the jet pipe 22, and the greater the spindle output power. The condensation chamber temperature is determined by the external cooling temperature. At low temperatures, the condensation chamber pressure is negative pressure. The pressure difference between the intake pressure and the condensation chamber pressure is the power of the airflow ejected from the jet nozzle 224 at high speed. The greater the pressure difference, the greater the output.

[0030] In other embodiments, four, six or other numbers of the air nozzles 224 may be provided, and the air nozzles 224 may rotate according to required driving force.

[0031] In this embodiment, the annular vent between the first cavity 11 and the second cavity 12 is covered with side-by-side louvers 13, so that the air nozzle 224 can spray gas onto the louvers 13 during the rotation process. In addition, the louvers 13 are set at a preset angle along the axial deflection of the air nozzle 22, so that the blades of the louvers 13 are opposite to the airflow ejected from the air nozzle 224, forming an injection support. The functions of the louvers 13 with a certain angle are: first, to form a rigid support for the gas ejected from the air nozzle 224, generating a greater reaction force to drive the air nozzle 22 to rotate; second, to guide the ejected gas, so that the gas ejected from the air nozzle 224 quickly enters the second cavity 12 to prevent turbulence after ejection; third, to form an isolation for the airflow to maintain a small pressure drop.

[0032] In order to increase the injection driving force, the outer wall of the straight tube of the injection pipe 22 is close to the inner wall of the first cavity 11, and a gap for rotation is provided between the two, thereby increasing the reaction force with the shutter 13 and ensuring that the gas ejected from the injection nozzle 224 is directed into the second cavity 12.

[0033] The power machine of this embodiment also includes an intake pipe 4 having an intake port and an outlet port. The intake shaft 23 of the rotor 2 is connected to the outlet port of the intake pipe 4 via a rotary joint 5 so that the intake shaft 23 can rotate relative to the intake pipe 4 .

[0034] The working principle of the power machine of this embodiment is as follows: low-temperature steam enters from the intake pipe 4, passes through the intake shaft 23 and enters the expansion chamber in the jet pipe 22, the gas is decompressed and expanded in the expansion chamber, the steam volume increases, the pressure decreases, and the temperature decreases, the expanded low-pressure steam enters the jet chamber, moves around the jet chamber, and is accelerated and ejected from the jet nozzles 224 around, the outlet direction of the jet nozzle 224 is extended to the rear tangent direction of the outer circle of the jet pipe 22, the jet nozzle 224 is equally divided on the outer circle, and the gas ejected outward from each jet nozzle 224 forms an equal driving force, which drives the jet pipe 22 to rotate, and the jet pipe 22 drives the output shaft 21 to rotate and output work.

[0035] In the low-pressure jet engine of this embodiment, since the stator 1 is provided with two cavities, the rotor 2 is installed in the internal cavity of the stator, and the jet pipe 22 in the rotor 2 is provided with an expansion cavity 221 which changes from small to large and a jet cavity 222 which changes from large to small, so that the low-temperature steam is first decompressed and expanded after entering the jet pipe 22, and the expanded low-pressure steam is then compressed and ejected from the jet nozzles 224 around the jet pipe 22 along the tangential direction into another cavity of the stator. The jet force of the jet nozzle 224 and the pressure difference between the two cavities in the stator 2 will accelerate the rotation of the rotor, so that the low-pressure jet engine can drive the output shaft to output work even if low-quality media such as low-temperature steam are introduced, and the low-quality media can be recycled to save energy.

[0036] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. A low-pressure jet engine, characterized in that: including a stator and a rotor; The stator is provided with a first cavity and a second cavity, the first cavity is located in the middle, the second cavity is arranged around the first cavity, an annular vent is provided between the first cavity and the second cavity, and the second cavity is provided with an exhaust port connected to the outside; The rotor comprises an output shaft, an air jet pipe and an air intake shaft, wherein the output shaft and the air intake shaft are located at two ends of the air jet pipe, one end of the air jet pipe is provided with an air inlet, and the other end is a closed end, and a plurality of air jet nozzles evenly distributed and tangent to the circumferential surface are provided on the side wall of the closed end, and an expansion chamber and an injection chamber connected along the air intake direction are provided in the air jet pipe, the expansion chamber is gradually expanded, and the injection chamber is divided and gradually reduced in all directions, the small opening of the expansion chamber is connected to the air inlet, and the reduced end of the injection chamber is connected to the air jet nozzle; the rotor is rotatably mounted on the stator through the output shaft and the air intake shaft, the air jet pipe is located in the first cavity, and the air jet nozzle of the air jet pipe is arranged opposite to the air vent between the first cavity and the second cavity; The jet pipe includes a conical tube and a straight tube, the straight tube is connected to the large mouth end of the conical tube, the conical tube has a gradually expanding expansion chamber, the end of the straight tube is sealed, and an air guide head is provided on the inner side of the closed end, the air guide head extends toward the conical tube with an outer diameter gradually decreasing, the straight tube and the internal air guide head form a jet chamber that gradually decreases from the middle to the surrounding areas; the air inlet of the jet pipe is arranged on the conical tube, and the jet nozzle of the jet pipe is arranged on the side wall of the straight tube.

2. The low-pressure jet engine according to claim 1, characterized in that: The air jet nozzle is gradually reduced in size along the air jet direction.

3. The low-pressure jet engine according to claim 2, characterized in that: The annular vent between the first cavity and the second cavity is covered with side-by-side shutters.

4. The low-pressure jet engine according to claim 3, characterized in that: The blades of the louver are arranged to be deflected by a preset angle along the axial direction of the air jet pipe, so that the blades of the louver are opposite to the airflow ejected from the air jet nozzle to form an injection support.

5. The low-pressure jet engine according to claim 4, characterized in that: The number of the air jet nozzles is three and they are evenly distributed on the circumference of the air jet pipe.

6. The low-pressure jet engine according to claim 4, characterized in that: The output shaft and the intake shaft are rotatably mounted on the stator via bearings respectively.

7. The low-pressure jet engine according to claim 4, characterized in that: The outer wall of the straight tube is close to the inner wall of the first cavity, and there is a gap for rotation between the two.

8. The low-pressure jet engine according to any one of claims 1 to 7, characterized in that: It also includes an air intake pipe, and the air intake shaft of the rotor is rotatably connected to the air outlet of the air intake pipe.

9. The low-pressure jet engine according to claim 8, characterized in that: The air inlet shaft of the rotor is connected to the air outlet of the air inlet pipe through a rotary joint.

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