Small gas turbine pump and method of operation thereof

Abstract

The application discloses a small-sized gas turbine pump, a starting motor, a compressor impeller, a first turbine and a rotating shaft are coaxially installed; a static vane ring is arranged in front of the first turbine, and an annular combustion chamber is arranged between the compressor impeller and the static vane ring; a second turbine and a centrifugal pump are installed on a turbine pump shaft. The application further discloses a working method of the small-sized gas turbine pump. External air enters the annular combustion chamber under the rotating action of the compressor impeller, and the gas in the annular combustion chamber drives the first turbine to rotate after passing through the static vane ring; the first turbine drives the compressor impeller to rotate, and the air continuously enters the annular combustion chamber under the rotating action of the compressor impeller, and the annular combustion chamber continuously generates gas; the gas after working on the first turbine is discharged through an adjustable guide vane ring and continues to drive the second turbine to rotate, the second turbine drives the centrifugal pump to rotate through the turbine pump shaft, and hydraulic energy supply is realized. The turbine pump can realize continuous long-time work, and can realize the purpose of multiple startings and variable working conditions.

Description

TECHNICAL FIELD

[0001] The present application relates to a small gas turbine pump and its working method, belonging to the technical field of gas turbine pump. BACKGROUND

[0002] Turbine pump is widely used in space launch and weapon system, in the field of aerospace, turbine pump is the heart of liquid rocket engine, providing continuous high pressure and large flow of propellant medium for engine combustion chamber work, in the field of weapons, turbine pump is also the heart of hydraulic servo system, providing high pressure energy for servo actuator, in the field of torpedo weapon, turbine pump is also a core power element to produce high pressure and high speed jet medium in pump jet propulsion. But no matter which application, turbine pump is only a core energy conversion unit or device, its work must rely on the primary energy to run. The primary energy of turbine pump in the above application has two forms, one is to drive through the high temperature and high pressure gas generated by liquid rocket engine combustion chamber, the second is to carry out work with one-time primary energy, such as solid fuel gas generator.

[0003] The common characteristics of the above two forms of primary energy are: after ignition, it can only work once, and cannot be started multiple times; the working time is affected by the total amount of primary energy, and cannot realize long time continuous working function; the structure is large and complex, and cannot be popularized to other application fields by modification or simplification; it cannot adapt to variable power and variable working condition in a wide range and multiple start. SUMMARY

[0004] The purpose of the present application is to overcome the above-mentioned defects, provide a small gas turbine pump and its working method, solve the technical problem that the existing turbine pump cannot work continuously for a long time, further solve the technical problem that it cannot adapt to variable power and variable working condition in a wide range and multiple start, the turbine pump of the present application can realize the best power matching, can realize continuous long time work, and further realize the purpose of multiple start and variable working condition.

[0005] In order to realize the above-mentioned application purpose, the present application provides the following technical scheme:

[0006] The application discloses a small-sized gas turbine pump, a starting motor, a compressor impeller, a first turbine and a rotating shaft are coaxially installed; a static vane ring is arranged in front of the first turbine, and an annular combustion chamber is arranged between the compressor impeller and the static vane ring; a second turbine and a centrifugal pump are installed on a turbine pump shaft, a rolling bearing is installed between the second turbine and the centrifugal pump, a mechanical seal is installed between the second turbine and the rolling bearing, and an adjustable guide vane ring is arranged between the first turbine and the second turbine. The application further discloses a working method of the small-sized gas turbine pump. External air enters the annular combustion chamber under the rotating action of the compressor impeller, and the gas in the annular combustion chamber drives the first turbine to rotate after the static vane ring. The first turbine drives the compressor impeller to rotate, and the air continuously enters the annular combustion chamber under the rotating action of the compressor impeller, so that the annular combustion chamber continuously generates gas. The gas after the first turbine does work is discharged through the adjustable guide vane ring and continues to drive the second turbine to rotate. The second turbine drives the centrifugal pump to rotate through the turbine pump shaft, the centrifugal pump pressurizes the hydraulic oil, and the hydraulic energy supply is realized. The turbine pump can realize continuous long-time work, and further realizes the purposes of multiple startings and variable working conditions.

[0007] The specific technical scheme of the application is as follows:

[0008] The small-sized gas turbine pump comprises a shell, and a starting motor, a compressor impeller, a rotating shaft, an annular combustion chamber, a static vane ring, a first turbine, an adjustable guide vane ring, a second turbine, a turbine pump shaft and a centrifugal pump arranged in the shell.

[0009] The starting motor, the compressor impeller and the first turbine are coaxially installed on the rotating shaft and rotate synchronously. The starting motor and the compressor impeller are installed on the front end of the rotating shaft, and the first turbine is installed on the rear end of the rotating shaft. The compressor impeller is located behind the starting motor, and the starting motor is used for starting the rotation of the rotating shaft.

[0010] The static vane ring is arranged in front of the first turbine, and the annular combustion chamber is arranged between the compressor impeller and the static vane ring. The shell is provided with an air inlet, a liquid inlet and a liquid outlet. External air is pressurized and then enters the annular combustion chamber under the rotating action of the compressor impeller. The gas generated after combustion of the annular combustion chamber drives the first turbine to rotate after expansion and acceleration through the static vane ring.

[0011] The second turbine and the centrifugal pump are coaxially installed on the front end and the rear end of the turbine pump shaft respectively. The adjustable guide vane ring is arranged between the first turbine and the second turbine, and is used for adjusting the speed and direction of the gas discharged through the first turbine.

[0012] The gas discharged through the adjustable guide vane ring drives the rotation of the centrifugal pump through the second turbine and the turbine pump shaft. The centrifugal pump sucks external liquid through the liquid inlet, pressurizes the liquid and then delivers the liquid to the liquid outlet, so as to realize the supply of external hydraulic energy.

[0013] Further, the shell comprises a shell one and a shell two.

[0014] The air inlet is arranged on the first casing; the starting motor, the compressor impeller, the rotating shaft and the first turbine inside the first casing form a set of independent shafting for cooperating with the annular combustion chamber and the stationary vane ring to generate working gas;

[0015] The liquid inlet and the liquid outlet are arranged on the second casing; the second turbine, the turbine pump shaft and the centrifugal pump inside the second casing form another set of independent shafting to form a gas hydraulic energy conversion device with the second casing, and the gas hydraulic energy conversion device realizes conversion of gas kinetic energy into hydraulic energy through the induced gas.

[0016] Further, the rotating shaft passes through the center of the annular combustion chamber and the stationary vane ring; the rotating shaft is installed in the casing through the rolling bearing; the annular combustion chamber and the stationary vane ring are fixedly installed in the casing.

[0017] Further, the annular combustion chamber is internally provided with an oil nozzle and an igniter; the oil nozzle is in communication with an external oil tank;

[0018] A fuel regulating valve is arranged on the pipeline for communicating the oil nozzle with the external oil tank.

[0019] Further, an air filter screen is arranged at the air inlet of the casing.

[0020] Further, the adjustable guide vane ring is fixedly installed in the casing.

[0021] The turbine pump shaft is supported in the casing by the rolling bearing.

[0022] Further, a mechanical seal is arranged between the second turbine and the centrifugal pump, and the mechanical seal is used to isolate the gas cavity working with the second turbine from the liquid cavity working with the centrifugal pump.

[0023] Further, the pressure / flow sensor and the controller are further included.

[0024] The pressure / flow sensor is used to detect the pressure or flow information of the liquid at the liquid outlet, and output the pressure or flow information of the liquid to the controller; the controller controls the fuel regulating valve to adjust the flow and the adjustable guide vane ring according to the pressure or flow information of the liquid, so as to realize power control of the output hydraulic energy.

[0025] The working method of the above-mentioned small gas turbine pump, characterized in that, comprises:

[0026] The starting motor starts the rotation of the rotating shaft, and the rotating shaft drives the rotation of the compressor impeller;

[0027] The external air enters the annular combustion chamber under the action of the rotating compressor impeller, and the gas generated after the annular combustion chamber is ignited drives the first turbine to rotate after being expanded and accelerated by the stationary vane ring;

[0028] The first turbine drives the compressor impeller to rotate, and the external air enters the annular combustion chamber under the action of the rotating compressor impeller, and the annular combustion chamber generates gas continuously;

[0029] The gas passes through the static blade ring and the first turbine to reach the adjustable guide vane ring, and the adjustable guide vane ring adjusts the speed and direction of the gas entering the second turbine;

[0030] The gas discharged through the adjustable guide vane ring drives the second turbine, and the turbine pump shaft and the centrifugal pump are coaxially driven to rotate, the centrifugal pump sucks external liquid through the liquid inlet, pressurizes the liquid, and then delivers the liquid to the liquid outlet, realizing the supply of external hydraulic energy.

[0031] Further, after the stable supply of external hydraulic energy, the electric motor stops working.

[0032] Compared with the prior art, the present application has at least one of the following beneficial effects:

[0033] (1) The present application creatively proposes a small gas turbine pump, which mainly consists of two parts, i.e. a gas generator part and a turbine pump part. The gas generator part is responsible for generating the working medium gas to drive the turbine pump, and the turbine pump part is responsible for converting hydraulic energy. The primary energy generated by the gas generator part is generated by burning liquid fuel and air, avoiding the use of disposable primary energy, thereby realizing multiple starts and continuous work.

[0034] (2) The present application adopts two independent shaft systems. The shaft system of the gas generator part is only responsible for generating gas by participating in the combustion part, and the shaft system of the turbine pump part is only responsible for converting energy to convert gas kinetic energy into hydraulic energy. There is no mechanical connection between the two parts, avoiding the vibration coupling of complex shaft systems, large moment of inertia, slow start and other shortcomings. Since the working medium gas is used for soft connection, and an adjustable guide vane ring is further arranged in the middle, the adjustable guide vane ring can adjust the speed and direction of the gas medium at the inlet of the turbine pump, realizing the best efficiency matching and power regulation of the whole machine system.

[0035] (3) The present application can accurately and efficiently control the hydraulic output power by controlling the angle of the adjustable guide vane ring and the oil injection amount of the fuel regulating valve, and realize the variable working condition use in a large load power range.

[0036] (4) The present application has the advantages of compact structure, self-contained system, easy realization of turbine pump continuous long time work, multiple starts and repeated use, and can be popularized to other fields besides aerospace technology. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 The present application is a power controllable gas turbine pump scheme principle diagram;

[0038] In the diagram, 1-Air inlet, 2-Starter motor, 3-Compressor impeller, 4-Annular combustion chamber, 5-Shaft, 6-Stationary vane ring, 7-First turbine, 8-Adjustable guide vane ring, 9-Turbine pump shaft, 10-Mechanical seal, 11-Centrifugal pump, 12-Liquid inlet, 13-Liquid outlet, 14-Pressure / flow sensor, 15-Controller, 16-Igniter, 17-Fuel regulating valve, 18-External fuel tank, 19-Fuel injector, 20-Housing housing one, 21-Second turbine, 22-Air filter, 23-Housing housing two. Detailed Implementation

[0039] The features and advantages of the present invention will become clearer and more apparent from the following detailed description.

[0040] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments. Although various aspects of embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless specifically indicated otherwise.

[0041] This invention proposes a solution that generates high-temperature, high-pressure gas by adding a dedicated liquid fuel and pressurized air medium, which is then used as the working fluid to drive a turbopump, thus enabling the turbopump to function. This innovative solution not only achieves continuous, long-term operation, multiple starts, and reuse of the turbopump, but also reduces its structure, weight, and size, and facilitates its use under varying operating conditions across a wide power load range. This invention allows the application of turbopumps to expand beyond aerospace and weaponry into the civilian sector.

[0042] In a preferred embodiment, the present invention can be divided into three parts in terms of overall structure and function: a gas generator section, a turbopump section, and a control section. The function of the gas generator section is to provide primary energy by burning fuel and compressed air to generate high-temperature and high-pressure gas. The function of the turbopump section is to guide the high-temperature and high-pressure gas generated by the gas generator section and convert its pressure energy and internal energy into high-pressure hydraulic energy. The function of the control section is to regulate and control the flow rate of liquid fuel input to the gas generator section according to the output performance index of the turbopump, and also to control the outlet angle of the adjustable guide vane ring, thereby realizing the overall performance control and regulation capability of the machine.

[0043] The gas generator part mainly comprises: a shell one, an air filter screen, a starting motor, a compressor impeller, a rotating shaft, an annular combustion chamber, a stationary vane ring, a first turbine, an oil nozzle, an igniter and the like. The starting motor, the compressor impeller and the first turbine are installed on the same rotating shaft and rotate coaxially; the stationary vane ring is installed before the first turbine, and the annular combustion chamber is installed between the compressor impeller and the first turbine; the stationary vane ring simultaneously serves as an outlet of the annular combustion chamber and an inlet of the first turbine; the rotating shaft passes through the center of the annular combustion chamber and the stationary vane ring and is installed on the shell one through rolling bearings; the oil nozzle and the igniter are installed in the cavity of the annular combustion chamber; the air filter screen is installed on the shell one and serves as a filter when the compressor impeller inhales air; and the shell one is provided with an air passage corresponding to the compressor impeller. When the starting motor is started, the compressor impeller and the first turbine are coaxially rotated to start, the oil nozzle sprays oil mist into the annular combustion chamber when the ignition speed is reached, the oil mist is mixed with the high-pressure air pressurized by the compressor impeller, the igniter starts to ignite, the annular combustion chamber generates high-temperature and high-pressure gas, the gas drives the first turbine to rotate at high speed after being expanded and accelerated by the stationary vane ring, the first turbine coaxially drives the compressor impeller to rotate and continuously inhales and pressurizes air into the annular combustion chamber, and the exhaust gas after the first turbine does work flows into the turbine pump part through the adjustable guide vane.

[0044] The turbine pump part mainly comprises: an adjustable guide vane ring, a second turbine, a turbine pump shaft, a mechanical seal, a centrifugal pump and a shell. The second turbine and the centrifugal pump are coaxially installed on the turbine pump shaft, rolling bearings are installed between the second turbine and the centrifugal pump on the turbine pump shaft, the mechanical seal is installed between the second turbine and the rolling bearings, and the shell two provides an external connection port for the centrifugal pump. The working principle is that the gas after the first turbine does work changes the speed direction and size after passing through the adjustable guide vane ring and enters the second turbine, the second turbine drives the turbine pump shaft and the centrifugal pump to rotate at high speed, the centrifugal pump inhales liquid from the outside through the shell two, and the liquid is delivered to the shell outlet after being pressurized by the centrifugal pump and provides hydraulic energy to the outside.

[0045] The control part mainly comprises: a pressure / flow sensor, a controller and a fuel regulating valve. The pressure / flow sensor is installed at the outlet of the centrifugal pump, measures the pressure / flow output by the centrifugal pump, and transmits the measured parameters to the controller, which compares the measured parameters with the target parameters set in the controller. If the measured parameters exceed the set range, the controller sends control instructions to the fuel regulating valve and the adjustable guide vane ring, adjusts and controls the amount of fuel injected into the gas generator part through the fuel regulating valve, adjusts the exhaust outlet angle of the adjustable guide vane ring, and finally controls the performance of the whole machine. The above-mentioned gas generator part, turbine pump part and control part are assembled into a whole machine system.

[0046] The present application is suitable for small turbine pump with output hydraulic power less than 50kW, and mainly uses gasoline, kerosene or alcohol and air mixture as fuel, and the output hydraulic medium can be hydraulic oil, water or other liquid medium. The shafting speed of the present application is 50-100krpm.

[0047] The present application will be described in detail below with reference to the accompanying drawings Figure 1 The present application will be described in detail below with reference to the accompanying drawings

[0048] A small gas turbine pump comprises a housing 20, a starting motor 2, a compressor impeller 3, a rotating shaft 5, an annular combustion chamber 4, a stationary vane ring 6, a first turbine 7, an adjustable guide vane ring 8, a second turbine 21, a turbine pump shaft 9 and a centrifugal pump 11 arranged in the housing 20.

[0049] The starting motor 2, the compressor impeller 3 and the first turbine 7 are coaxially arranged on the rotating shaft 5 and rotate synchronously. The starting motor 2 and the compressor impeller 3 are arranged at the front end of the rotating shaft 5, and the first turbine 7 is arranged at the rear end of the rotating shaft 5. The compressor impeller 3 is arranged behind the starting motor 2. The starting motor 2 is used to start the rotation of the rotating shaft 5.

[0050] The stationary vane ring 6 is arranged in front of the first turbine 7, and the annular combustion chamber 4 is arranged between the compressor impeller 3 and the stationary vane ring 6. The housing 20 is provided with an air inlet 1. The housing 23 is provided with a liquid inlet 12 and a liquid outlet 13. The external air is pressurized by the compressor impeller 3 and then enters the annular combustion chamber 4. The gas produced by the combustion of the annular combustion chamber 4 drives the first turbine 7 to rotate after being expanded and accelerated by the stationary vane ring 6.

[0051] The exhaust gas of the first turbine 7 changes direction through the adjustable guide vane ring 8 and then drives the second turbine 21 to rotate. The exhaust gas after work is directly discharged through the housing 20. The second turbine 21 and the centrifugal pump 11 are coaxially arranged at the front end and the rear end of the turbine pump shaft 9, respectively. A mechanical seal 10 is arranged between the second turbine 21 and the centrifugal pump 11 to separate the gas cavity of the second turbine 21 from the liquid cavity of the centrifugal pump 11.

[0052] The adjustable guide vane ring 8 arranged between the first turbine 7 and the second turbine 21 is used to adjust the speed and direction of the gas discharged from the first turbine 7 into the second turbine 21, so as to finally adjust the output power of the centrifugal pump 11. The centrifugal pump 11 sucks the external liquid through the liquid inlet 12, pressurizes the liquid and then delivers the liquid to the liquid outlet 13, so as to supply external hydraulic energy.

[0053] The start motor 2, the compressor impeller 3, the rotating shaft 5 and the first turbine 7 form a set of independent shafting for cooperating with the annular combustion chamber 4 and the stationary vane ring 6 to generate the working gas; the rotating shaft 5 penetrates through the center of the annular combustion chamber 4 and the stationary vane ring 6; the rotating shaft 5 is installed in the shell through rolling bearings; the annular combustion chamber 4 and the stationary vane ring 6 are fixedly installed in the shell 20.

[0054] The second turbine 21, the turbine pump shaft 9 and the centrifugal pump 11 form another set of independent shafting and are installed in the shell 23, and form a gas hydraulic energy conversion device with the shell 23, which realizes the conversion of the gas kinetic energy into the hydraulic energy through the induced gas.

[0055] In a specific embodiment, the annular combustion chamber 4 is internally provided with the oil nozzle 19 and the igniter 16; the oil nozzle 19 is in communication with the external oil tank 18 and the fuel regulating valve 17.

[0056] In a specific embodiment, the air filter screen 22 is installed at the air inlet 1 of the shell 20.

[0057] In a specific embodiment, the adjustable guide vane ring 8 is arranged between the first turbine 7 and the second turbine 21, and is fixedly installed in the shell 20.

[0058] In a specific embodiment, the mechanical seal 10 is arranged between the second turbine 21 and the centrifugal pump 11, and is used for isolating the working space between the second turbine 21 and the centrifugal pump 11.

[0059] In a specific embodiment, the pressure / flow sensor 14, the controller 15 and the fuel regulating valve 17 are further included; the fuel regulating valve 17 is arranged on the pipeline for communicating the oil nozzle 19 with the external oil tank; the pressure / flow sensor 14 is used for detecting the pressure or flow information of the liquid at the liquid outlet and outputting the pressure or flow information of the liquid to the controller 15; the controller 15 controls the fuel regulating valve 17 to adjust the flow and the adjustable guide vane ring 8 according to the pressure or flow information of the liquid, so as to realize the power control of the output hydraulic energy.

[0060] The working method of the above-mentioned small gas turbine pump comprises the following steps:

[0061] The start motor 2 starts the rotation of the rotating shaft 5, and the rotating shaft 5 drives the compressor impeller 3 to rotate;

[0062] The external air enters the annular combustion chamber 4 under the action of the rotating compressor impeller 3, and the gas generated after the annular combustion chamber 4 is ignited drives the first turbine 7 to rotate after being expanded and accelerated by the stationary vane ring 6;

[0063] The first turbine 7 drives the compressor impeller 3 to rotate, and the external air continuously enters the annular combustion chamber 4 under the rotating action of the compressor impeller 3, and the annular combustion chamber 4 continuously generates gas;

[0064] The gas reaches the adjustable guide vane ring 8 after passing through the static vane ring 6 and the first turbine 7, and the adjustable guide vane ring 8 adjusts the speed and direction of the gas entering the second turbine 21.

[0065] The gas discharged through the adjustable guide vane ring 8 drives the second turbine 21 to rotate coaxially with the turbine pump shaft 9 and the centrifugal pump 11, the centrifugal pump 11 sucks the external liquid through the liquid inlet 12 and pressurizes the liquid to be delivered to the liquid outlet 13, thereby achieving the supply of external hydraulic energy.

[0066] Further, after the stable supply of external hydraulic energy, the starting motor 2 stops working.

[0067] Embodiment:

[0068] An embodiment of the present application is given, Figure 1 is the schematic diagram of the present application.

[0069] The small gas turbine pump of the embodiment comprises a gas generator part, a turbine pump part and a control part.

[0070] The gas generator part mainly comprises: an air inlet 1, a starting motor 2, a compressor impeller 3, a rotating shaft 5, an annular combustion chamber 4, a static vane ring 6, a first turbine 7, an oil nozzle 19, an igniter 16, a first housing 20 and an air filter screen 22. The starting motor 2, the compressor impeller 3 and the first turbine 7 are installed on the same rotating shaft 5 and rotate coaxially; the static vane ring 6 is installed in front of the first turbine 7, the annular combustion chamber 4 is installed between the compressor impeller 3 and the first turbine 7, the static vane ring 6 simultaneously serves as the outlet of the annular combustion chamber 4 and the air inlet of the first turbine 7; the rotating shaft 5 passes through the center of the annular combustion chamber 4 and the static vane ring 6 and is installed on the whole machine housing 20 through rolling bearings, the oil nozzle 19 and the igniter 16 are installed in the cavity of the annular combustion chamber 4, the air filter screen 22 is installed at the air inlet 1 and serves as a filter when the compressor impeller 3 sucks in air, and the first housing 20 is provided with an air passage communicating with the compressor impeller 3. When the starting motor 2 is started, it drives the compressor impeller 3 and the first turbine 7 to rotate coaxially and start, when the ignition rotating speed is reached, the oil nozzle 19 sprays oil mist into the annular combustion chamber 4 and mixes with the high-pressure air pressurized by the compressor impeller 3, the igniter 16 starts to ignite, the annular combustion chamber 4 generates high-temperature and high-pressure gas, the gas expands and accelerates after passing through the static vane ring 6 to drive the first turbine 7 to rotate at high speed, the first turbine 7 drives the compressor impeller 3 to rotate coaxially and continues to suck in air, pressurizes the air and enters the annular combustion chamber 4, and the exhaust gas after the first turbine 7 works flows into the second turbine 21 through the adjustable guide vane 8.

[0071] The turbine pump part mainly comprises: an adjustable guide vane ring 8, a second turbine 21, a turbine pump shaft 9, a mechanical seal 10, a centrifugal pump 11, a shell 23, and the like. The second turbine 21 and the centrifugal pump 11 are installed on the turbine pump shaft 9, two rolling bearing pairs are installed between the second turbine 21 and the centrifugal pump 11 to support the second turbine 21 and the centrifugal pump 11, the mechanical seal 10 is installed between the second turbine 21 and the rolling bearing, and the shell 23 provides an external connection port for the centrifugal pump 11. The working principle is that the high-temperature and high-speed gas introduced through the adjustable guide vane 8 drives the second turbine 21 to rotate, the second turbine 21 drives the turbine pump shaft 9 to rotate at a high speed, the turbine pump shaft 9 synchronously drives the centrifugal pump 11 to rotate, the centrifugal pump 11 sucks liquid from the outside through the liquid inlet 12, and the liquid is delivered to the liquid outlet 13 after being pressurized by the centrifugal pump 11 and rotating, and the liquid provides hydraulic energy to the outside.

[0072] The control part mainly comprises: a pressure / flow sensor 14, a controller 15, a fuel regulating valve 17, and the like. The pressure / flow sensor 14 is installed at the outlet of the centrifugal pump 11, can measure the pressure / flow output by the centrifugal pump 11, and transmits the measured parameters to the controller 15, compares the measured parameters with the target parameters set in the controller 15, and if the measured parameters exceed the set range, the controller 15 sends a control instruction to the fuel regulating valve 17 and the adjustable guide vane ring 8, adjusts and controls the amount of fuel injected by the gas generator part through the fuel regulating valve 17, adjusts the exhaust outlet angle of the adjustable guide vane ring 8, and finally realizes the control of the overall performance. The external fuel tank 18 is used to store fuel. The above-mentioned gas generator part, turbine pump part and control part are assembled into an overall system.

[0073] The above detailed description of the present application is combined with the specific embodiments and exemplary examples, but these descriptions cannot be understood as limitations of the present application. Those skilled in the art understand that the technical solutions and embodiments of the present application can be variously replaced, modified or improved without deviating from the spirit and scope of the present application, and these fall within the scope of the present application. The protection scope of the present application is subject to the appended claims.

[0074] The contents not described in detail in the specification of the present application are the known technology of those skilled in the art.

Claims

1. A small gas turbine pump, characterized in that, It includes a housing, and inside the housing are a starter motor (2), a compressor impeller (3), a shaft (5), an annular combustion chamber (4), a stationary blade ring (6), a first turbine (7), an adjustable guide vane ring (8), a second turbine (21), a turbine pump shaft (9), and a centrifugal pump (11); The starter motor (2), compressor impeller (3) and first turbine (7) are coaxially mounted on the rotating shaft (5) and rotate synchronously. The starter motor (2) and compressor impeller (3) are mounted at the front end of the rotating shaft (5), the first turbine (7) is mounted at the rear end of the rotating shaft (5), and the compressor impeller (3) is located behind the starter motor (2). The starter motor (2) is used to start the rotation of the rotating shaft (5). The stationary blade ring (6) is located in front of the first turbine (7), and the annular combustion chamber (4) is located between the compressor impeller (3) and the stationary blade ring (6); the casing is provided with an air inlet (1), a liquid inlet (12) and a liquid outlet (13); the external air is pressurized by the rotation of the compressor impeller (3) and enters the annular combustion chamber (4); the gas produced by the combustion in the annular combustion chamber (4) is expanded and accelerated by the stationary blade ring (6) and drives the first turbine (7) to rotate. The second turbine (21) and the centrifugal pump (11) are coaxially mounted at the front and rear ends of the turbine pump shaft (9), respectively; the adjustable guide vane ring (8) is located between the first turbine (7) and the second turbine (21) to adjust the speed and direction of the gas discharged through the first turbine (7); The gas discharged through the adjustable guide vane ring (8) drives the centrifugal pump (11) to rotate through the second turbine (21) and the turbine pump shaft (9); the centrifugal pump (11) sucks in external liquid through the liquid inlet (12) and pressurizes the liquid before delivering it to the liquid outlet (13) to realize the supply of external hydraulic energy.

2. A small gas turbine pump according to claim 1, characterized in that, The shell comprises shell one (20) and shell two (23); An air inlet (1) is located on the housing (20); the starter motor (2), compressor impeller (3), rotating shaft (5) and first turbine (7) inside the housing (20) form an independent shaft system, which is used to cooperate with the annular combustion chamber (4) and stationary blade ring (6) to generate working gas; The liquid inlet (12) and liquid outlet (13) are located on the second housing (23); the second turbine (21), turbine pump shaft (9) and centrifugal pump (11) inside the second housing (23) form another independent shaft system, which together with the second housing (23) form a gas-hydraulic energy conversion device. The gas-hydraulic energy conversion device realizes the conversion of gas kinetic energy into hydraulic energy by diverting gas.

3. A small gas turbine pump according to claim 1, characterized in that, The rotating shaft (5) passes through the center of the annular combustion chamber (4) and the stationary vane ring (6); the rotating shaft (5) is installed inside the housing via a rolling bearing; the annular combustion chamber (4) and the stationary vane ring (6) are fixedly installed inside the housing.

4. A small gas turbine pump according to claim 1, characterized in that, The annular combustion chamber (4) is equipped with a fuel injector (19) and an igniter (16); the fuel injector (19) is connected to the external fuel tank (18); A fuel regulating valve (17) is provided on the pipeline used to connect the fuel injector (19) and the external fuel tank (18).

5. A small gas turbine pump according to claim 1, characterized in that, An air filter (22) is installed at the air inlet (1) of the housing.

6. A small gas turbine pump according to claim 1, characterized in that, The adjustable guide vane ring (8) is fixedly installed inside the housing; The turbine pump shaft (9) is supported inside the housing by rolling bearings.

7. A small gas turbine pump according to claim 1, characterized in that, A mechanical seal (10) is provided between the second turbine (21) and the centrifugal pump (11). The mechanical seal (10) is used to isolate the gas chamber where the second turbine (21) works from the liquid chamber where the centrifugal pump (11) works.

8. A small gas turbine pump according to claim 4, characterized in that, It also includes a pressure / flow sensor (14) and a controller (15); The pressure / flow sensor (14) is used to detect the pressure or flow information of the liquid at the liquid outlet and output the pressure or flow information of the liquid to the controller (15); the controller (15) controls the fuel regulating valve (17) to adjust the flow and the adjustable guide vane ring (8) according to the pressure or flow information of the liquid, so as to realize the power control of the hydraulic energy output to the outside.

9. A method for operating a small gas turbine pump according to any one of claims 1-8, characterized in that, include: Start the motor (2) to start the rotation of the shaft (5), and the shaft (5) drives the compressor impeller (3) to rotate; External air enters the annular combustion chamber (4) under the rotation of the compressor impeller (3). After the annular combustion chamber (4) is ignited, the gas produced expands and accelerates through the stationary blade ring (6) and drives the first turbine (7) to rotate. The first turbine (7) drives the compressor impeller (3) to rotate. Under the action of the rotation of the compressor impeller (3), the external air continuously enters the annular combustion chamber (4), and the annular combustion chamber (4) continuously generates combustion gas. After passing through the stationary blade ring (6) and the first turbine (7), the gas reaches the adjustable guide vane ring (8), which adjusts the speed and direction of the gas entering the second turbine (21). The gas discharged through the adjustable guide vane ring (8) drives the second turbine (21) to rotate the turbine pump shaft (9) and the centrifugal pump (11) coaxially. The centrifugal pump (11) draws in external liquid through the liquid inlet (12), pressurizes the liquid, and delivers it to the liquid outlet (13) to realize the supply of external hydraulic energy.

10. The operating method of a small gas turbine pump according to claim 9, characterized in that, After the external hydraulic energy supply is stable, start the motor (2) and stop working.

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