Dynamic pressure opening bypass device of ship air inlet system

Abstract

The invention belongs to the technical field of ship air inlet systems, and particularly relates to a ship air inlet system dynamic pressure opening bypass device which comprises a mounting seat with a pressure relief cavity, and a dynamic pressure plate is arranged in the pressure relief cavity; a plurality of cylinders for axially driving the movable pressing plate are uniformly distributed on the circumference of one end of the pressure relief cavity, and a pressure relief opening communicated with an air inlet system is formed in the other end of the pressure relief cavity; the movable pressing plate abuts against the pressure relief opening in a plane sealing mode. Spring seats A fixed on the movable pressing plate are symmetrically arranged on the two sides of the air cylinder, and springs are arranged on the spring seats A in a sleeving manner; the spring seat A penetrates through the mounting seat in a sliding manner; the movable pressing plate is used for opening and closing the pressure relief opening, and the pressure relief cavity is used for supplying gas to the gas turbine. In this way, when the air inlet system is blocked, emergency air supply can be conducted on the gas turbine, and the power safety of a ship is guaranteed.

Description

Technical Field

[0001] The present invention belongs to the technical field of ship air intake systems, and in particular relates to a dynamic pressure opening bypass device for a ship air intake system. Background Art

[0002] With the development of gas turbines for shipbuilding, in order to adapt to the marine environment, a complete air intake system is needed to filter the intake air at the front end of the gas turbine. However, with long-term navigation and use, the air intake system will face airflow blockage, air intake contamination, and increased pressure difference in the air intake system, resulting in insufficient air intake for the gas turbine, affecting the working efficiency of the gas turbine, and in severe cases, causing power system failure.

[0003] Therefore, it is urgent to set up a bypass device when the pressure difference of the air intake system reaches a certain level to guide the blocked airflow and increase the flow area, so as to solve the problem of sudden insufficient air intake during sea navigation and ensure the power safety of the ship. Summary of the invention

[0004] The present invention provides a dynamic pressure opening bypass device for a ship's air intake system, comprising a mounting seat with a pressure relief chamber, wherein a dynamic pressure plate is arranged in the pressure relief chamber; a plurality of cylinders for axially driving the dynamic pressure plate are evenly distributed on the circumference of one end of the pressure relief chamber, and a pressure relief port connected to the air intake system is arranged at the other end; the dynamic pressure plate and the pressure relief port are abutted with a plane seal; spring seats A fixed to the dynamic pressure plate are symmetrically arranged on both sides of the cylinder, and a spring is sleeved on the spring seat A; the spring seat A slides through the mounting seat; the dynamic pressure plate is used for opening and closing the pressure relief port, and the pressure relief chamber is used for supplying air to a gas turbine.

[0005] Furthermore, the mounting seat comprises a groove-shaped shell; the bottom of the groove-shaped shell is provided with a flange connected to the air intake system, and the top is bolted with a fixing seat; the pressure relief port is arranged at the bottom of the groove-shaped shell.

[0006] Furthermore, the cylinder is a double-acting cylinder.

[0007] Furthermore, the fixing seat includes a fixing plate, on which is provided a sleeve matching the position of the cylinder; the fixing plate is fixed to the top of the groove-shaped shell by a plurality of fastening screws A; the sleeve is communicated with the pressure relief chamber; and the cylinder body of the cylinder is coaxially fixed in the sleeve.

[0008] Furthermore, a cylindrical seat through which a gas rod passes is provided at the outer end of the cylinder, and the cylindrical seat is coaxially embedded in the sleeve and is bolted and fixed to the sleeve by a plurality of fastening screws B.

[0009] Furthermore, a connecting assembly corresponding to the position of the cylinder is provided on the dynamic pressure plate; the connecting assembly includes a limit block and a bayonet; a T-shaped through slot is provided in the limit block, and the limit block is fixed on the dynamic pressure plate; the bayonet is located in the T-shaped through slot and is used to pull or tighten the limit block; the limit block is bolted and fixed to the end of the gas rod of the cylinder.

[0010] Furthermore, a connecting assembly corresponding to the position of the cylinder is provided on the dynamic pressure plate; the connecting assembly includes a limit block and a bayonet; a T-shaped through slot is provided in the limit block, and the limit block is fixed on the dynamic pressure plate; the bayonet is located in the T-shaped through slot and is used to pull or tighten the limit block; the limit block is bolted and fixed to the end of the gas rod of the cylinder.

[0011] Furthermore, a spring seat B is provided in the middle of the dynamic pressure plate, and a spring is sleeved on the spring seat B; the spring seat B slides through the mounting seat; and a plurality of cylinders are evenly distributed relative to the central circumference of the spring seat B.

[0012] Furthermore, the pressure difference across the dynamic pressure plate is P, the area of ​​the pressure relief port is S, the number of springs is n, the elastic coefficient of the spring is k, and the original compression amount of the spring is x; x=(P×S) / (n×k).

[0013] Furthermore, a plurality of the cylinders are connected to each other and are provided with a three-position five-way solenoid valve.

[0014] Furthermore, the three-position five-way solenoid valve is a center-drain three-position five-way solenoid valve.

[0015] The beneficial effects brought by the present invention are as follows:

[0016] When the air intake system is blocked, the movement of the dynamic pressure plate is switched between automatic control and remote control under the action of the spring and the cylinder, ensuring that the air intake system can provide emergency air supply to the gas turbine through the pressure relief port and the pressure relief chamber, thereby ensuring the power safety of the ship. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic cross-sectional structure diagram of a dynamic pressure opening bypass device for a ship air intake system according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 Schematic diagram of the connection of the middle cylinder.

[0019] In the figure, 1, flange; 2, dynamic pressure plate; 3, spring; 4, limit block; 5, bayonet; 6, fastening screw B; 7, cylinder; 8, fixing seat; 9, fastening screw A. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example

[0022] like Figure 1 and Figure 2 As shown, the present invention provides a dynamic pressure opening bypass device for a ship's air intake system, comprising a mounting seat with a pressure relief chamber, in which a dynamic pressure plate 2 is arranged; a plurality of cylinders 7 for axially driving the dynamic pressure plate 2 are evenly distributed on the circumference of one end of the pressure relief chamber to ensure that the dynamic pressure plate 2 is evenly stressed, and a pressure relief port connected to the air intake system is arranged at the other end; spring seats A fixed on the dynamic pressure plate 2 are symmetrically arranged on both sides of the cylinder 7, and a spring 3 is sleeved on the spring seat A; the spring seat A slides through the mounting seat.

[0023] The flow area of ​​the air intake system is increased by the pressure relief port; the opening and closing of the pressure relief port by the dynamic pressure plate 2 is realized by the cylinder 7; the spring 3 can assist the cylinder 7 so that the dynamic pressure plate 2 is sealed tightly at the pressure relief port; when an air pressure difference appears at both ends of the dynamic pressure plate 2, the pressure relief port is opened, and the air flows from the air intake system to the pressure relief chamber and provides emergency air supply to the gas turbine, thereby ensuring the power safety of the ship.

[0024] The mounting seat may include a groove-shaped housing, the bottom of which is provided with a flange 1 for connecting the air intake system; the top of the groove-shaped housing is bolted with a fixing seat 8; and a pressure relief port is provided at the bottom of the groove-shaped housing. When the dynamic pressure plate 2 is opened, air flows out from both ends of the groove-shaped housing and supplies air to the gas turbine. Figure 1 As shown, the left end of the groove-shaped housing is the top, and the right end is the bottom, and the details are not repeated here.

[0025] The above-mentioned cylinder 7 is preferably a double-acting cylinder, which improves the load capacity of the cylinder 7 and further ensures the overall stability, so that the dynamic pressure plate 2 can quickly open and close the pressure relief port; further improve the power safety of the ship. Specifically, the above-mentioned fixed seat 8 includes a fixed plate, on which a sleeve matching the position of the cylinder 7 is provided; the fixed plate is fixed to the top of the groove-shaped shell by a number of fastening screws A9; the sleeve is connected to the pressure relief chamber; the cylinder 7 is located in the sleeve, and the cylinder body of the cylinder 7 is coaxially fixed on the sleeve. A cylindrical seat through which the gas rod passes can also be provided at the outer end of the cylinder 7. The cylindrical seat is coaxially embedded in the sleeve and bolted to the sleeve by a number of fastening screws B6 to ensure the stability of the installation position of the cylinder 7.

[0026] The double-acting cylinder here is a purchased part, which mainly includes a cylinder body and a gas rod. The gas rod is provided with a piston, and the piston moves in the cylinder body, thereby driving the gas rod to move in both directions. The details are not repeated here.

[0027] As an embodiment of the present invention, when the cylinder 7 is a double-acting cylinder, a connecting assembly corresponding to the position of the cylinder 7 is provided on the dynamic pressure plate 2; the connecting assembly includes a limit block 4 and a bayonet 5; a T-shaped through groove is provided in the limit block 4, and the limit block 4 is fixed on the dynamic pressure plate 2; the bayonet 5 is located in the T-shaped through groove and is used to pull or tighten the limit block 4, that is, the bayonet 5 can move axially in the T-shaped through groove under the drive of the cylinder 7; the limit block 4 is bolted and fixed to the end of the gas rod of the cylinder 7; the whole is convenient for installation and use.

[0028] When the air intake system is blocked, the pressure at the front end of the dynamic pressure plate 2 will increase. When the pressure is greater than the closing force generated by the spring 3 at the rear end of the dynamic pressure plate 2, the dynamic pressure plate 2 will disengage from the pressure relief port to form an airflow path, so that the overall pressure of the air intake system drops, ensuring the air intake effect of the gas turbine. According to the requirements of different power core air intake volume and air intake pressure difference, the size of the opening force can be changed by replacing the spring 3 to match the limit pressure difference value of the air intake system. When the limit pressure difference value is exceeded in the air intake system, the dynamic pressure of the present invention is opened.

[0029] In contrast, when the emphasis is placed on ensuring the cleanliness of the intake air or other needs, a three-position five-way solenoid valve is used to control the cylinder 7 to drive the bayonet 5 to tighten the limit block, so that the dynamic pressure plate is in a normally closed state. In the normally closed state, the airflow cannot open the bypass device through dynamic pressure. In addition, a spring seat B can be provided in the middle of the dynamic pressure plate 2, and a spring 3 is sleeved on the spring seat B; the spring seat B slides through the mounting seat; a number of cylinders 7 are evenly distributed relative to the central circumference of the spring seat B, further ensuring that the dynamic pressure plate 2 is evenly stressed.

[0030] When selecting the specification of the spring 3, it can be selected according to the formula x = (P × S) / (n × k), where P is the pressure difference between the two ends of the dynamic pressure plate 2, S is the area of ​​the pressure relief port, n is the number of springs 3, and k is the elastic coefficient of the spring 3, which will not be described in detail.

[0031] When the present invention adopts the above-mentioned connection assembly, there are two modes of automatic control and remote control. In the automatic control mode, no human operation is required. Through the dynamic pressure effect, when the pressure difference between the front and rear ends of the dynamic pressure plate 2 reaches the set value, the dynamic pressure plate 2 will automatically open to increase the air flow path and ensure that the air intake system supplies emergency air to the gas turbine through the pressure relief port and the pressure relief chamber. The pressure difference setting value can be achieved by replacing the spring 3 on the dynamic pressure plate 2 according to different working conditions.

[0032] When the pressure difference between the front and rear ends of the dynamic pressure plate 2 is lower than the set value, the force generated by the dynamic pressure effect will be smaller than the elastic force of the spring 3. Under the action of the elastic force, the dynamic pressure plate 2 is pressed against the pressure relief port, the air flow path disappears, and the bypass device is automatically closed. In the automatic mode, the bypass device is opened by dynamic pressure, which can realize the bypass function after the intake system is blocked in real time, without other control components and computers, which greatly saves resources.

[0033] In the remote control mode, in response to the requirement of keeping the bypass device opened by dynamic pressure normally open or normally closed, the three-position five-way solenoid valve controls the bayonet 5 at the front end of the cylinder 7 to press against the limit block 4 on the dynamic pressure plate 2, so that the dynamic pressure plate 2 cannot be opened by the dynamic pressure effect, and the dynamic pressure plate 2 is normally closed. After the cylinder 7 is reversed, the bayonet 5 pulls the limit block 4, so that the dynamic pressure plate 2 is disengaged from the pressure relief port, and the normally open state is achieved. In the normally open state, the air flow path remains unobstructed.

[0034] The three-position five-way solenoid valve here preferably uses a center-leakage three-position five-way solenoid valve, and accordingly, the cylinder 7 uses a two-way cylinder. After the remote control method is adopted, the piston stroke of the cylinder 7 needs to be adjusted to the middle position through the three-position five-way solenoid valve. The center-leakage three-position five-way solenoid valve can relieve the cylinder pressure when the cylinder 7 stroke is in the middle position. After the pressure relief, the limit effect of the cylinder 7 fails, and the dynamic pressure plate 2 can normally open the dynamic pressure according to the changes in the air pressure at the front and rear ends, and the dynamic pressure opening bypass device of the ship's air intake system enters the automatic control mode.

[0035] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A dynamic pressure opening bypass device for a ship air intake system, characterized in that: It comprises a mounting seat with a pressure relief chamber, wherein a dynamic pressure plate (2) is arranged in the pressure relief chamber; a plurality of cylinders (7) for axially driving the dynamic pressure plate (2) are evenly distributed on the circumference of one end of the pressure relief chamber, and a pressure relief port connected to an air intake system is arranged at the other end; the dynamic pressure plate (2) and the pressure relief port are abutted against each other by a plane seal; spring seats A fixed to the dynamic pressure plate (2) are symmetrically arranged on both sides of the cylinder (7), and a spring (3) is sleeved on the spring seat A; the spring seat A slides through the mounting seat; the dynamic pressure plate (2) is used for opening and closing the pressure relief port, and the pressure relief chamber is used for supplying air to the gas turbine.

2. The dynamic pressure opening bypass device of a ship air intake system according to claim 1, characterized in that: The mounting seat comprises a groove-shaped shell; the bottom of the groove-shaped shell is provided with a flange (1) connected to the air intake system, and the top is bolted with a fixing seat (8); the pressure relief port is arranged at the bottom of the groove-shaped shell.

3. The dynamic pressure opening bypass device of a ship air intake system according to claim 2 is characterized in that: The cylinder (7) is a double-acting cylinder.

4. The dynamic pressure opening bypass device of a ship air intake system according to claim 3 is characterized in that: The fixing seat (8) comprises a fixing plate, on which a sleeve matching the position of the cylinder (7) is provided; the fixing plate is fixed to the top of the groove-shaped shell by a plurality of fastening screws A (9); the sleeve is in communication with the pressure relief chamber; and the cylinder body of the cylinder (7) is coaxially fixed in the sleeve.

5. The dynamic pressure opening bypass device of a ship air intake system according to claim 4, characterized in that: The outer end of the cylinder (7) is provided with a cylindrical seat through which the gas rod passes. The cylindrical seat is coaxially embedded in the sleeve and is bolted and fixed to the sleeve by a plurality of fastening screws B (6).

6. The dynamic pressure opening bypass device of a ship air intake system according to claim 3, characterized in that: The dynamic pressure plate (2) is provided with a connection assembly corresponding to the position of the cylinder (7); the connection assembly comprises a limit block (4) and a bayonet (5); a T-shaped through slot is provided in the limit block (4), and the limit block (4) is fixed on the dynamic pressure plate (2); the bayonet (5) is located in the T-shaped through slot and is used to pull or tighten the limit block (4); the limit block (4) is bolted and fixed to the end of the gas rod of the cylinder (7).

7. The dynamic pressure opening bypass device of a ship air intake system according to claim 6, characterized in that: A spring seat B is provided in the middle of the dynamic pressure plate (2), and a spring (3) is sleeved on the spring seat B; the spring seat B slides through the mounting seat; and a plurality of cylinders (7) are evenly distributed relative to the central circumference of the spring seat B.

8. The dynamic pressure opening bypass device of a ship air intake system according to claim 7, characterized in that: The pressure difference between the two ends of the dynamic pressure plate (2) is P, the area of ​​the pressure relief port is S, the number of the springs (3) is n, the elastic coefficient of the spring (3) is k, and the original compression amount of the spring (3) is x; x = (P×S) / (n×k).

9. The dynamic pressure opening bypass device of a ship air intake system according to claim 8, characterized in that: A plurality of the cylinders (7) are connected to each other and are provided with a three-position five-way solenoid valve.

10. The dynamic pressure opening bypass device of a ship air intake system according to claim 9, characterized in that: The three-position five-way solenoid valve is a center-drain three-position five-way solenoid valve.

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