Methanol ejector carbon deposition monitoring device based on sound wave detection

Abstract

The invention relates to the technical field of dual-fuel engines, and provides a methanol injector carbon deposition monitoring device based on sound wave detection, which comprises a plurality of sound wave probes arranged outside an engine cylinder through a fixed assembly, and the fixed assembly comprises a first clamping piece and an air pressure cylinder which are arranged on an engine body. The carbon deposition monitoring device further comprises a vertically-arranged pressure control cylinder, a first piston sealing piece is arranged in the pressure control cylinder, a balance weight piece is arranged on the first piston sealing piece, a second piston sealing piece is arranged in the air pressure cylinder, a second clamping piece is arranged on the second piston sealing piece, and a co-pressure pipe is arranged between the pressure control cylinder and the air pressure cylinder in a communicating mode. The clamping force on the sonic probe is always consistent and continuously kept, no matter how an engine cylinder vibrates, the clamping force of the first clamping piece and the second clamping piece on the sonic probe is always kept to be set force, the situation that the sonic probe is loosened and deviates is avoided, disassembly and assembly are convenient, and the overhaul and maintenance efficiency of the sonic probe is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dual-fuel engines, and in particular to a methanol injector carbon deposition monitoring device based on acoustic wave detection. Background Art

[0002] With the transformation of ship power systems towards low-carbonization, marine methanol dual-fuel engines have gradually been widely used due to their good environmental characteristics and fuel adaptability. However, during the methanol fuel injection process, the injector head is prone to carbon deposits due to high-temperature oxidation and accumulation of fuel residues, resulting in deterioration of the spray shape and increased injection volume deviation. In severe cases, it may even cause engine power reduction, excessive emissions and operational reliability problems. Therefore, real-time and accurate monitoring of the carbon deposit status of the methanol injector is of great significance to ensuring the efficient and stable operation of the engine.

[0003] In recent years, acoustic wave detection technology has been gradually introduced into combustion system condition monitoring. This technology, based on the changing characteristics of acoustic wave propagation in a medium, analyzes echo signals to identify the formation and thickness distribution of carbon deposits. Specifically, several acoustic wave probes (such as piezoelectric ultrasonic probes) are typically placed outside the engine cylinder, close to the methanol injector. The ultrasonic probes transmit acoustic waves of a specific frequency and receive their echoes. A corresponding processing and analysis system processes and analyzes the echo signals to infer the carbon deposit adhesion on the injector nozzle orifice or inner cavity surface. Currently, acoustic wave probes are mostly mounted on the outside of the cylinder using bolts. Periodic combustion bursts and piston assembly movement within the cylinder induce strong mechanical vibrations. This vibration can loosen the bolts, causing the acoustic wave probe to shift in position and change the detection angle, directly affecting the accuracy of acoustic wave signal transmission and acquisition. In addition, to ensure the long-term reliability of the monitoring system, the acoustic wave probes must be regularly removed for inspection and maintenance (such as calibration and cleaning). The bolted mounting method makes it very inconvenient to remove and install the acoustic wave probes, affecting inspection and maintenance efficiency.

[0004] Therefore, the present invention proposes a methanol injector carbon deposition monitoring device based on acoustic wave detection to solve the above problems. Summary of the Invention

[0005] The embodiment of the present invention aims to provide a methanol injector carbon deposit monitoring device based on acoustic wave detection to solve the above-mentioned problem.

[0006] To achieve the above object, the present invention provides the following technical solutions: A methanol injector carbon deposit monitoring device based on acoustic wave detection includes a plurality of acoustic wave probes arranged outside the engine cylinder through fixed components and a processing and analysis unit for processing and analyzing the echo signals of the acoustic wave probes to obtain information on methanol injector carbon deposits; The fixed assembly includes a first clamping member and a pneumatic cylinder provided on the engine body, the carbon deposit monitoring device also includes a vertically arranged pressure control cylinder, a first piston seal is provided in the pressure control cylinder, and a counterweight is provided on the first piston seal, a second piston seal is provided in the pneumatic cylinder, and a second clamping member opposite to the first clamping member is provided on the second piston seal, and a common pressure pipe is provided between the pressure control cylinder and the pneumatic cylinder; The fixing assembly further comprises a pushing component for driving the second clamping component to move in a direction away from the first clamping component to loosen the acoustic wave probe.

[0007] In an optional solution: the pushing component includes a resistance rod hinged on the first clamping member, one end of the resistance rod is used to resist the second clamping member, and the carbon deposit monitoring device also includes an operating rod, which is used to be connected to the resistance rod to utilize the leverage effect to drive the resistance rod to deflect to push the second clamping member to move in a direction away from the first clamping member.

[0008] In an optional solution: the operating rod includes a rod body and a plug-in portion provided at one end of the rod body, and the abutment rod is provided with a slot for inserting the plug-in portion.

[0009] In an optional solution, a roller is provided on one end of the interference rod for interfering with the second clamping member.

[0010] In an optional solution, the air pressure cylinder is provided with a plurality of limiting bosses for preventing the second piston seal from slipping.

[0011] In an optional solution, the opposite sides of the first clamping member and the second clamping member are both provided with limiting grooves adapted to the contour of the acoustic wave probe, and protective pads are provided on the walls of the limiting grooves.

[0012] In an optional solution: the carbon deposit monitoring device also includes an adaptive component for keeping the pressure control cylinder vertical, the adaptive component includes a frame, a first frame body arranged on the frame body, a second frame body rotatably arranged on the first frame body, and a supporting member rotatably arranged on the second frame body, the pressure control cylinder is arranged on the supporting member, and the rotation plane of the second frame body and the rotation plane of the supporting member are perpendicular to each other.

[0013] In an optional solution, a rotation damper is provided at the location where the second frame is rotatably connected to the first frame and at the location where the bearing member is rotatably connected to the second frame.

[0014] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: 1. The gravity of the counterweight drives the first piston seal downward to inject air into the air cylinder, thereby driving the second piston seal to move toward the open end of the air cylinder, that is, the second clamping member moves toward the first clamping member to clamp and fix the acoustic wave probe. The gravity on the counterweight is constant. When the pressure control cylinder is in a vertical state, the downward pressure of the counterweight on the first piston seal is constant, so that the balance air pressure between the pressure control cylinder and the air cylinder is always consistent, that is, the clamping force on the acoustic wave probe is always consistent and maintained continuously. No matter how the engine cylinder vibrates, the clamping force of the first clamping member and the second clamping member on the acoustic wave probe always maintains the set force, avoiding the acoustic wave probe from loosening and deflecting, ensuring the accuracy of acoustic wave signal emission / collection, that is, ensuring the accuracy of carbon deposit monitoring of methanol injectors; 2. The second clamping member is driven by the pushing member to move in a direction away from the first clamping member, thereby loosening the acoustic wave probe. During installation, the second clamping member is first driven by the pushing member to move a certain distance in a direction away from the first clamping member so that the distance between the first clamping member and the second clamping member is greater than the size of the acoustic wave probe. Then, the acoustic wave probe is placed between the first clamping member and the second clamping member. Subsequently, the pushing member is released, and the second clamping member automatically moves toward the first clamping member under the action of air pressure to achieve clamping. This makes disassembly and assembly convenient, greatly improving the efficiency of inspection and maintenance of the acoustic wave probe.

[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings are incorporated into and constitute a part of the specification to illustrate embodiments consistent with the present application and, together with the specification, serve to explain the principles of the present application. These drawings and the accompanying description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments.

[0017] Figure 1 Schematic diagram of the structure of an embodiment of the present invention.

[0018] Figure 2 Schematic diagram of the arrangement between the pressure control cylinder, the first piston seal and the counterweight in an embodiment of the present invention.

[0019] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0020] Figure 4 3D schematic diagram of the second clamping member in an embodiment of the present invention.

[0021] Figure 5 Schematic diagram of the arrangement between the adaptive component and the pressure control cylinder in an embodiment of the present invention.

[0022] Notes on figure numbers: 1-engine cylinder part, 2-fixed assembly, 201-first clamping member, 202-air pressure cylinder, 203-second piston seal, 204-second clamping member, 205-limiting boss, 206-resistance rod, 207-roller, 208-limiting groove, 209-protective pad, 3-pressure control cylinder, 4-common pressure pipe, 5-adaptive assembly, 501-frame, 502-first frame, 503-second frame, 504-bearing member, 505-rotational damper, 6-counterweight, 7-first piston seal, 8-slot, 9-rod body, 10-plug-in part, 11-sonic wave probe. DETAILED DESCRIPTION

[0023] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0024] See also Figures 1 to 4 A methanol injector carbon deposit monitoring device based on acoustic wave detection includes a plurality of acoustic wave probes arranged outside the engine cylinder through a fixed assembly 2 and a processing and analysis unit for processing and analyzing echo signals of the acoustic wave probes to obtain information on methanol injector carbon deposits; The fixed assembly 2 includes a first clamping member 201 and an air pressure cylinder 202 provided on the engine body (the first clamping member 201 and the air pressure cylinder 202 can be fixed to the engine body by welding, or can be integrally formed with the engine housing, which is not limited in this application). The carbon deposit monitoring device also includes a vertically arranged pressure control cylinder 3, in which a first piston seal 7 is provided, and a counterweight 6 is provided on the first piston seal 7. A second piston seal 203 is provided in the air pressure cylinder 202, and a second clamping member 204 is provided on the second piston seal 203, which is directly opposite to the first clamping member 201. A common pressure pipe 4 is provided between the pressure control cylinder 3 and the air pressure cylinder 202 (the common pressure pipe 4 is a hose, and is a metal hose); The fixing assembly 2 further includes a pushing component for driving the second clamping member 204 to move away from the first clamping member 201 to release the acoustic wave probe.

[0025] It should be noted that the processing and analysis unit finally obtains the carbon deposit information of the methanol injector through a series of algorithm processing and analysis (including signal preprocessing, feature extraction, data fusion and diagnosis, etc.); the carbon deposit monitoring device also includes a main control unit, and the functions of the main control unit include system scheduling and timing control, human-computer interaction and communication, and data management, etc. The above is the existing technology, so it will not be repeated here.

[0026] The acoustic wave probe is placed between the first clamping member 201 and the second clamping member 204, and the sensing end of the acoustic wave probe is in contact with the outer wall of the engine cylinder. The gravity of the counterweight 6 drives the first piston seal 7 to press down and inject air into the pressure cylinder 202, thereby driving the second piston seal 203 to move toward the open end of the pressure cylinder 202, that is, the second clamping member 204 moves toward the first clamping member 201 to clamp and fix the acoustic wave probe (in the clamped and fixed state, the air pressure in the pressure control cylinder 3 is consistent with the air pressure in the pressure cylinder 202, and is in a balanced state, and the counterweight 6 Theoretically, the weight 6 is subjected to a constant gravity. When the pressure control cylinder 3 is in a vertical state, the weight 6 exerts a constant downward pressure on the first piston seal 7. This ensures that the equilibrium air pressure between the pressure control cylinder 3 and the air pressure cylinder 202 is always consistent. This means that the clamping force on the acoustic wave probe is always consistent and maintained continuously. Regardless of how the engine cylinder vibrates, the clamping force of the first clamping member 201 and the second clamping member 204 on the acoustic wave probe always maintains a set force (the clamping force is determined by the mass of the weight 6. The greater the mass of the weight 6, the greater the clamping force on the acoustic wave probe). , on the contrary, the smaller the clamping force, and the clamping force is affected by factors such as the actual navigation of the ship in actual application scenarios and is a range value, and the lower limit of the range value meets the minimum clamping force requirement for the acoustic probe), to avoid loosening and deviation of the acoustic probe, to ensure the accuracy of acoustic signal emission / collection, that is, to ensure the accuracy of carbon deposit monitoring of the methanol injector; when the acoustic probe needs to be removed for inspection and maintenance, the second clamping member 204 is driven by the pushing component to move in the direction away from the first clamping member 201 (that is, the second piston seal 203 is pushed back to inject air into the pressure control cylinder 3 to cause When the first piston seal 7 is moved upward, the sonic probe is loosened. During installation, the second clamping member 204 is first driven by the pushing member to move a certain distance away from the first clamping member 201 so that the distance between the first clamping member 201 and the second clamping member 204 is larger than the size of the sonic probe. Then, the sonic probe is placed between the first clamping member 201 and the second clamping member 204. The pushing member is then released, and the second clamping member 204 automatically moves toward the first clamping member 201 under the action of air pressure to achieve clamping. This makes disassembly and assembly convenient, greatly improving the efficiency of inspection and maintenance of the sonic probe.

[0027] Furthermore, the air cylinder 202 is provided with a plurality of limiting bosses 205 for preventing the second piston seal 203 from slipping.

[0028] Furthermore, the opposite sides of the first clamping member 201 and the second clamping member 204 are provided with a limiting groove 208 that is adapted to the contour of the acoustic wave probe, and a protective pad 209 is provided on the groove wall of the limiting groove 208. The acoustic wave probe is limited by the limiting groove 208 to improve its clamping stability. The protective pad 209 is preferably a rubber pad, which can not only play a clamping protection role, but also play a certain shock absorption role.

[0029] See also Figure 1 and Figure 3 In one embodiment of the present invention, the pushing component includes a resisting rod 206 hinged on the first clamping member 201, one end of the resisting rod 206 is used to resist the second clamping member 204, and the carbon deposit monitoring device further includes an operating rod connected to the resisting rod 206 to use a lever effect to drive the resisting rod 206 to deflect and push the second clamping member 204 to move away from the first clamping member 201; The operating rod includes a rod body 9 and an inserting portion 10 provided at one end of the rod body 9 , and the abutting rod 206 is provided with a slot 8 for inserting the inserting portion 10 .

[0030] In this embodiment, the operator holds the operating lever and inserts the plug-in portion 10 into the slot 8 on the target interference rod 206, and then deflects the interference rod 206 by deflecting the operating lever. One end of the interference rod 206 interferes with the second clamping member 204, thereby pushing the second clamping member 204 to move away from the first clamping member 201, thereby realizing the loosening action. By setting the operating lever to extend the power arm, the second clamping member 204 can be easily pushed using the leverage effect.

[0031] Furthermore, in this embodiment, a roller 207 is provided at one end of the resistance rod 206 for resisting the second clamping member 204. By providing the roller 207, the resistance between the end of the resistance rod 206 and the second clamping member 204 is converted from sliding friction to rolling friction, thereby improving the smoothness of the pushing action of the second clamping member 204.

[0032] See also Figure 1 and Figure 5 In one embodiment of the present invention, the carbon deposit monitoring device further includes an adaptive component 5 for keeping the pressure control cylinder 3 vertical. The adaptive component 5 includes a frame 501 (fixed on the side wall of the cabin), a first frame 502 provided on the frame 501, a second frame 503 rotatably provided on the first frame 502, and a supporting member 504 rotatably provided on the second frame 503. The pressure control cylinder 3 is provided on the supporting member 504, and the rotation plane of the second frame 503 and the rotation plane of the supporting member 504 are perpendicular to each other.

[0033] In this embodiment, since the ship inevitably shakes during navigation, this embodiment is proposed to prevent the pressure control cylinder 3 from causing large fluctuations in the downward pressure of the counterweight 6 on the first piston seal 7 due to the shaking of the ship. Specifically, when the ship shakes (methanol dual-fuel engines are generally used in larger ships, which generally adopt a lower GM value (Metacentric Height) design, and the shaking characteristics are: slow speed, long period, and possibly large amplitude but relatively soft), the second frame 503 and the bearing member 504 adaptively deflect under the action of the overall gravity of the pressure control cylinder 3, so that the pressure control cylinder 3 is always in a vertical state, and thus the counterweight 6 is always under a relatively stable downward pressure on the first piston seal 7.

[0034] Furthermore, in this embodiment, a rotation damper 505 is provided at the rotational connection point between the second frame 503 and the first frame 502, and at the rotational connection point between the supporting member 504 and the second frame 503. By setting the rotation damper 505, the deflection rate of the second frame 503 and the supporting member 504 is controlled to achieve smooth deflection movement and effectively suppress the reciprocating shaking of the pressure control cylinder 3.

[0035] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A methanol injector carbon deposit monitoring device based on acoustic wave detection, comprising a plurality of acoustic wave probes arranged outside the engine cylinder through a fixed assembly (2) and a processing and analysis unit for processing and analyzing the echo signals of the acoustic wave probes to obtain methanol injector carbon deposit information, characterized in that : The fixed assembly (2) includes a first clamping member (201) and a pressure cylinder (202) provided on the engine body, the carbon deposit monitoring device also includes a vertically arranged pressure control cylinder (3), a first piston seal (7) is provided in the pressure control cylinder (3), and a counterweight (6) is provided on the first piston seal (7), a second piston seal (203) is provided in the pressure cylinder (202), and a second clamping member (204) opposite to the first clamping member (201) is provided on the second piston seal (203), and a common pressure pipe (4) is provided between the pressure control cylinder (3) and the pressure cylinder (202); The fixing assembly (2) further comprises a pushing component for driving the second clamping member (204) to move in a direction away from the first clamping member (201) to loosen the sonic probe.

2. The methanol injector carbon deposition monitoring device based on acoustic wave detection according to claim 1 is characterized in that: The pushing component comprises a resisting rod (206) hinged on the first clamping member (201), one end of the resisting rod (206) being used to resist the second clamping member (204), and the carbon deposit monitoring device further comprises an operating rod connected to the resisting rod (206) so as to utilize a lever action to drive the resisting rod (206) to deflect so as to push the second clamping member (204) to move in a direction away from the first clamping member (201).

3. The methanol injector carbon deposition monitoring device based on acoustic wave detection according to claim 2 is characterized in that: The operating rod comprises a rod body (9) and a plug-in portion (10) provided at one end of the rod body (9), and the abutting rod (206) is provided with a slot (8) for inserting the plug-in portion (10).

4. The methanol injector carbon deposition monitoring device based on acoustic wave detection according to claim 2, characterized in that: The end of the interference rod (206) used for interfering with the second clamping member (204) is provided with a roller (207).

5. The methanol injector carbon deposition monitoring device based on acoustic wave detection according to claim 1, characterized in that: The air pressure cylinder (202) is provided with a plurality of limiting bosses (205) for preventing the second piston seal (203) from slipping.

6. The methanol injector carbon deposition monitoring device based on acoustic wave detection according to claim 1, characterized in that: The opposite sides of the first clamping member (201) and the second clamping member (204) are both provided with limiting grooves (208) adapted to the contour of the sonic probe, and protective pads (209) are provided on the walls of the limiting grooves (208).

7. The methanol injector carbon deposition monitoring device based on acoustic wave detection according to claim 1, characterized in that: The carbon deposit monitoring device further includes an adaptive component (5) for keeping the pressure control cylinder (3) vertical, the adaptive component (5) including a frame (501), a first frame (502) arranged on the frame (501), a second frame (503) rotatably arranged on the first frame (502), and a supporting member (504) rotatably arranged on the second frame (503), the pressure control cylinder (3) is arranged on the supporting member (504), and the rotation plane of the second frame (503) and the rotation plane of the supporting member (504) are perpendicular to each other.

8. The methanol injector carbon deposition monitoring device based on acoustic wave detection according to claim 7, characterized in that: A rotation damper (505) is provided at the rotational connection point between the second frame (503) and the first frame (502), and at the rotational connection point between the bearing member (504) and the second frame (503).

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