Double-oil-way centrifugal nozzle structure with main oil way and auxiliary oil way integrally designed

Abstract

The invention aims to provide a double-oil-way centrifugal nozzle structure with a main oil way and an auxiliary oil way integrally designed, which belongs to the field of gas turbines and comprises a main oil way pipe and an auxiliary oil way pipe, a main oil way oil pressure control valve is arranged between the main oil way pipe and the auxiliary oil way pipe, and a main oil way rotational flow section is arranged below the main oil way oil pressure control valve. The main oil way rotational flow section is provided with a main oil way rotational flow section beveled groove, a main oil way rotational flow chamber is arranged below the main oil way rotational flow section, the auxiliary oil way rotational flow section is arranged below the auxiliary oil way pipe, the auxiliary oil way rotational flow section is provided with an auxiliary oil way rotational flow section beveled groove, and an auxiliary oil way rotational flow chamber is arranged below the auxiliary oil way rotational flow section. And the nozzle is respectively communicated with the main oil path rotational flow chamber and the auxiliary oil path rotational flow chamber. The main oil way and the auxiliary oil way achieve independent work of the low-oil-pressure auxiliary oil way and simultaneous work of the main oil way and the auxiliary oil way under the control of different oil pressure control valve pairs, the oil pressure of fuel oil flowing into the double-oil-way centrifugal nozzle is stable and continuous, and the risk of carbon black generation on the wall face of a combustion chamber is reduced.

Description

Technical Field

[0001] The present invention relates to a gas turbine, specifically to a nozzle of a gas turbine. Background Art

[0002] The dual - oil - circuit centrifugal nozzle combines the advantages of the early single - oil - circuit centrifugal nozzle and improves and redesigned its disadvantages. It has two oil circuits, and the main and auxiliary oil circuits can be in series or parallel. The operation of the main and auxiliary oil circuits is controlled by an oil - pressure control valve, enabling the gas turbine to meet the requirements of operating under a relatively wide range of working conditions. The dual - oil - circuit integrated nozzle can accurately control the fuel injection quantity and injection time, thereby improving the fuel utilization rate and injection efficiency and enhancing fuel economy.

[0003] Traditional fuel nozzles can only be used under working conditions with a relatively small oil - pressure range, and the subsequent developed dual - oil - circuit centrifugal nozzles generally only have an oil - pressure control valve for the main oil circuit. In the initial stage when fuel enters the nozzle, the oil pressure is unstable and the fuel flow is discontinuous. If the fuel is directly passed through the dual - oil - circuit centrifugal nozzle, it will drip into the combustion chamber in the form of oil droplets, which will generate carbon black on the inner wall of the combustion chamber. The long - term accumulation of carbon black will cause damage to the inner wall of the combustion chamber and even unstable combustion. Summary of the Invention

[0004] The purpose of the present invention is to provide a dual - oil - circuit centrifugal nozzle structure with an integrated design of the main and auxiliary oil circuits that can achieve the independent operation of the auxiliary oil circuit and the simultaneous operation of the main and auxiliary oil circuits.

[0005] The purpose of the present invention is achieved as follows:

[0006] A dual - oil - circuit centrifugal nozzle structure with an integrated design of the main and auxiliary oil circuits of the present invention is characterized in that it includes a main oil - circuit pipe and an auxiliary oil - circuit pipe. The auxiliary oil - circuit pipe is arranged inside the main oil - circuit pipe. A main - oil - circuit oil - pressure control valve is arranged between the main oil - circuit pipe and the auxiliary oil - circuit pipe. A main - oil - circuit swirl section is arranged below the main - oil - circuit oil - pressure control valve. The main - oil - circuit swirl section is provided with a main - oil - circuit swirl - section oblique cut groove. A main - oil - circuit swirl chamber is arranged below the main - oil - circuit swirl section. An auxiliary - oil - circuit swirl section is arranged below the auxiliary oil - circuit pipe. The auxiliary - oil - circuit swirl section is provided with an auxiliary - oil - circuit swirl - section oblique cut groove. An auxiliary - oil - circuit swirl chamber is arranged below the auxiliary - oil - circuit swirl section. A nozzle opening is arranged at the end of the main oil - circuit pipe, and the nozzle opening is respectively communicated with the main - oil - circuit swirl chamber and the auxiliary - oil - circuit swirl chamber.

[0007] The present invention may further include:

[0008] 1. The main - oil - circuit oil - pressure control valve includes a ring body, a movable hollow rotating body, and a hollow ring body from top to bottom. A slide - rail structure is arranged on the inner wall of the main oil - circuit pipe. The end of the ring body is matched with the slide - rail structure. A connecting rod is installed between the ring body and the movable hollow rotating body. One end of a main - oil - circuit oil - pressure control valve spring is connected to the ring body, and the other end passes through the movable hollow rotating body and is connected to the hollow ring body. A round hole is arranged on the movable hollow rotating body, and a through - hole is arranged on the hollow ring body.

[0009] 2. When the ring body is not under pressure, the connecting rod is in an inclined state. After the ring body is pressurized, the inclination angle of the connecting rod increases, causing the movable hollow rotating body to rotate.

[0010] 3. An inlet total oil pressure control valve is provided at the inlet of the main oil pipe. The inlet total oil pressure control valve includes a slide rail, a slider, and an inlet total oil pressure control spring. The slide rail is fixed to the main oil pipe, the slider is installed in the slide rail, and the inlet total oil pressure control spring is installed between the slider and the inner wall of the main oil pipe.

[0011] 4. After the fuel enters from the main oil pipe, it pushes the slider to compress the inlet total oil pressure control spring. When the slider is compressed to disengage from the slide rail, the fuel enters the interior of the main oil pipe.

[0012] 5. When the oil pressure passing through the inlet total oil pressure control valve is less than the pressure for pushing the ring body, the main oil pressure control valve is in a closed state. The fuel enters the secondary oil pipe swirl section through the secondary oil pipe, enters the secondary oil pipe swirl chamber through the inclined cut grooves of the secondary oil pipe swirl section, and forms a swirl before spraying out from the nozzle.

[0013] 6. After the fuel pushes the ring body to move downward, it compresses the main oil pressure control valve spring, and the connecting rod pushes the movable hollow rotating body below to rotate. When the circular hole on the movable hollow rotating body overlaps with the through hole on the fixed hollow ring body below, the main oil pressure control valve is in an open state, and the fuel enters the main oil pipe swirl section, enters the main oil pipe swirl chamber through the inclined cut grooves of the main oil pipe swirl section, and forms a swirl before spraying out from the nozzle.

[0014] The advantages of the present invention are as follows: Under the control of different oil pressure control valves for the main and secondary oil circuits of the present invention, the low oil pressure secondary oil circuit works independently. When the oil pressure increases to a certain value, the main oil circuit opens, and at this time, the main and secondary oil circuits work simultaneously. A total oil pressure control valve is installed at the fuel inlet to ensure that the fuel oil pressure flowing into the dual - oil - circuit centrifugal nozzle is stable and continuous, reducing the risk of carbon black generation on the combustion chamber wall. The present invention can achieve the opening and closing of the main oil circuit without splitting the fuel flowing into the main and secondary oil circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic diagram of the slide rail;

[0017] Figure 3 is a schematic diagram of the inlet total oil pressure control spring and the slider;

[0018] Figure 4 is a cross - sectional view of the secondary oil pipe swirl section;

[0019] Figure 5 is a schematic diagram of the nozzle;

[0020] Figure 6 Schematic diagram of the main oil circuit oil pressure control valve;

[0021] Figure 7 Schematic diagram of the movable hollow rotating body;

[0022] Figure 8 Cross-sectional view after removing the movable hollow rotating body;

[0023] Figure 9 Schematic diagram of the slide rail structure;

[0024] Figure 10 Schematic diagram of the hollow ring body;

[0025] Figure 11 Cross-sectional view of the swirl section of the main oil circuit. Specific implementation mode

[0026] The present invention will be described in more detail with reference to the accompanying drawings as follows:

[0027] Combined with Figures 1-11 , a dual-oil-circuit centrifugal nozzle structure with an integrated design of the main and auxiliary oil circuits of the present invention includes: a main oil circuit pipe 1, an auxiliary oil circuit pipe 2, a main oil circuit swirl section 3, an auxiliary oil circuit swirl section 4, a nozzle 5, a main oil circuit oil pressure control valve 6, and an inlet total oil pressure control valve 7; the inlet total oil pressure control valve 7 consists of a slide rail 8 welded to the main oil circuit pipe 1, an inlet total oil pressure control valve spring 9, and a slider 10; the main oil circuit oil pressure control valve 6 consists of a ring body 15, a connecting rod 16, a main oil circuit oil pressure control valve spring 17, a movable hollow rotating body 18, and a hollow ring body 19; wherein the hollow ring body 19 is fixed to the main oil circuit pipe 1, the main oil circuit oil pressure control valve spring 17 connects the hollow ring body 19 and the ring body 15, and the main oil circuit oil pressure control valve spring passes through the movable hollow rotating body 18; the ring body 15 is connected to the main oil circuit pipe 1 through a slide rail structure 20, so that the ring body 15 can only perform translational motion along the axis; there are four round holes 21 and a moving area hole 23 for the main oil circuit oil pressure control valve spring 17 on the movable hollow rotating body 18; the hollow ring body 19 connects the main oil circuit pipe 1 and the auxiliary oil circuit pipe 2, and there are 4 through holes 22 on it, the connecting rod 16 is inclined, when the ring body 15 is pressed down, the inclination angle of the connecting rod 16 increases and approaches the horizontal more, pushing the hollow rotating body 18 to rotate, and the hollow rotating body 18 has two kinds of openings, one is a round hole for oil passage, and the other is the moving space for the main oil circuit oil pressure control valve spring 17.

[0028] Fuel enters the double - oil - path centrifugal nozzle from the elbow inlet. First, it passes through the inlet total oil - pressure control valve 7. When the fuel inlet oil pressure is stable and reaches a certain value, the oil pressure presses the slider 10 to drive the compression of the inlet total oil - pressure control valve spring 9. When the slider 10 is compressed to disengage from the slide rail 8, the fuel enters the double - oil - path centrifugal nozzle. At this time, the oil pressure is relatively small, the main - oil - path oil - pressure control valve 6 is in the closed state, the sub - oil - path is a passage, and the sub - oil - path works alone. The fuel enters the sub - oil - path pipe 2. Figure F - F is the sectional view of the sub - oil - path swirl section 4. The fuel enters the sub - oil - path swirl section 4, passes through the sub - oil - path swirl section inclined cut - off groove 12, enters the sub - oil - path swirl chamber 14 to form a swirl and then sprays out from the nozzle 5.

[0029] When the inlet oil pressure increases, the fuel entering the double - oil - path centrifugal nozzle presses the ring body 15. Since there is a slide - rail structure 20 connecting the ring body 15 and the main - oil - path pipe 1, the ring body 15 moves downward along the axis, compressing the main - oil - path oil - pressure control valve spring 17. At this time, the connecting rod 16 pushes the movable hollow rotating body 18 below to rotate. When the movable hollow rotating body 18 rotates to a certain position, the circular hole 21 on the movable hollow rotating body 18 overlaps with the through - hole 22 on the fixed hollow ring body 19 below. At this time, the main - oil - path oil - pressure control valve 6 is in the open state, and the main and sub - oil - paths work simultaneously. Figure E - E is the sectional view of the main - oil - path swirl section 3. The fuel enters the main - oil - path swirl section 3, passes through the main - oil - path swirl section inclined cut - off groove 11, enters the main - oil - path swirl chamber 13 to form a swirl and then sprays out from the nozzle 5.

Claims

1. A dual-oil-circuit centrifugal nozzle structure with an integrated design of main and auxiliary oil circuits, characterized in that: It includes a main oil passage pipe and a secondary oil passage pipe. The secondary oil passage pipe is arranged inside the main oil passage pipe. A main oil passage oil pressure control valve is arranged between the main oil passage pipe and the secondary oil passage pipe. A main oil passage swirl section is arranged below the main oil passage oil pressure control valve. The main oil passage swirl section is provided with an inclined cut groove of the main oil passage swirl section. A main oil passage swirl chamber is arranged below the main oil passage swirl section. A secondary oil passage swirl section is arranged below the secondary oil passage pipe. The secondary oil passage swirl section is provided with an inclined cut groove of the secondary oil passage swirl section. A secondary oil passage swirl chamber is arranged below the secondary oil passage swirl section. A nozzle is arranged at the end of the main oil passage pipe, and the nozzle is respectively communicated with the main oil passage swirl chamber and the secondary oil passage swirl chamber.

2. The double-oil-way centrifugal nozzle structure with an integrated design of the main and auxiliary oil ways according to claim 1, characterized in that: The main oil passage oil pressure control valve includes a ring body, a movable hollow rotating body, and a hollow ring body from top to bottom. A slide rail structure is arranged on the inner wall of the main oil passage pipe. The end of the ring body is matched with the slide rail structure. A connecting rod is installed between the ring body and the movable hollow rotating body. One end of the main oil passage oil pressure control valve spring is connected to the ring body, and the other end passes through the movable hollow rotating body and is connected to the hollow ring body. A round hole is arranged on the movable hollow rotating body, and a through hole is arranged on the hollow ring body.

3. A dual-oil-way centrifugal nozzle structure with an integrated design of the main and auxiliary oil ways, characterized in that: When the ring body is not pressurized, the connecting rod is in an inclined state. After the ring body is pressurized, the inclination angle of the connecting rod increases, thereby causing the movable hollow rotating body to rotate.

4. A dual-oil-circuit centrifugal nozzle structure with an integrated design of the main and auxiliary oil circuits, characterized in that: An inlet total oil pressure control valve is arranged at the inlet of the main oil passage pipe. The inlet total oil pressure control valve includes a slide rail, a slider, and an inlet total oil pressure control spring. The slide rail is fixed to the main oil passage pipe, the slider is installed in the slide rail, and an inlet total oil pressure control spring is installed between the slider and the inner wall of the main oil passage pipe.

5. A dual-oil-circuit centrifugal nozzle structure with an integrated design of the main and auxiliary oil circuits, characterized in that: After the fuel enters from the main oil passage pipe, it pushes the slider to compress the inlet total oil pressure control spring. When the slider is compressed to disengage from the slide rail, the fuel enters the interior of the main oil passage pipe.

6. The dual - oil - circuit centrifugal nozzle structure with an integrated design of the main and auxiliary oil circuits according to claim 1, characterized in that: When the oil pressure passing through the inlet total oil pressure control valve is less than the pressure for pushing the ring body, the main oil passage oil pressure control valve is in a closed state. The fuel enters the secondary oil passage swirl section through the secondary oil passage pipe, enters the secondary oil passage swirl chamber through the inclined cut groove of the secondary oil passage swirl section, forms a swirl and then sprays out from the nozzle.

7. A dual-oil-circuit centrifugal nozzle structure with an integrated main and auxiliary oil circuit design according to claim 3, characterized in that: When the fuel pushes the ring body to move downward, it compresses the main oil passage oil pressure control valve spring, and the connecting rod pushes the movable hollow rotating body below to rotate; When the round hole on the movable hollow rotating body overlaps with the through hole on the fixed hollow ring body below, the main oil passage oil pressure control valve is in an open state. The fuel enters the main oil passage swirl section, enters the main oil passage swirl chamber through the inclined cut groove of the main oil passage swirl section, forms a swirl and then sprays out from the nozzle.

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