Electric control multi-way valve for oil injection control of marine low-speed two-stroke diesel engine

Abstract

The utility model relates to the technical field of multi-way valves, and discloses an electric control multi-way valve for oil injection control of a marine low-speed two-stroke diesel engine, which comprises a main valve and a pilot valve, the main valve is a three-position three-way valve, and the pilot valve is a two-position four-way proportional valve. The main valve and the pilot valve have the function of receiving various types of control signals of a host control system, and the main valve has the function of transmitting valve element displacement signals to the host control system. A C opening is formed in the upper end of the main valve, and a P opening and a T opening are formed in the two sides of the lower end of the main valve correspondingly. A port E and a port F are formed in the two sides of the upper end of the pilot valve respectively, and a port B and a port A are formed in the two sides of the lower end of the pilot valve respectively. According to the utility model, the three-position three-way valve is matched with the two-position four-way valve, so that the oil injection control requirements of the marine low-speed two-stroke diesel engine on high-frequency response, high precision, quick response and safe position of the oil injection control valve can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of multi-way valves, in particular to an electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke diesel engine for use in ships. Background Art

[0002] Marine low-speed two-stroke diesel engines are the most important power systems for civilian marine vessels. The world's major marine low-speed two-stroke diesel engine patent holders, represented by MAN and Wärtsilä, all use diesel engine electronic injection technology, and the high-precision electronically controlled multi-way valve used for injection control is its core component.

[0003] Therefore, this type of valve must meet the high frequency response, high precision, fast response and fail-safe position functions required for diesel engine injection control, and must also have communication signal interface functions with various types of diesel engines. For this purpose, an electronically controlled multi-way valve for marine low-speed two-stroke diesel engine injection control is proposed. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke marine diesel engine to solve the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke marine diesel engine, comprising:

[0008] A main valve and a pilot valve, wherein the main valve is a three-position three-way valve, and the pilot valve is a two-position four-way proportional valve. The main valve and the pilot valve have the function of receiving various types of control signals from the host control system, and the main valve has the function of transmitting the valve core displacement signal to the host control system;

[0009] The upper end of the main valve is provided with a C port, and both sides of the lower end of the main valve are provided with a P port and a T port;

[0010] The two sides of the upper end of the pilot valve are respectively provided with an E port and an F port, and the two sides of the lower end of the pilot valve are respectively provided with a B port and an A port.

[0011] Preferably, a Y-type filter is provided on one side of the upper end of the main valve, and the Y-type filter is connected to the C port through a flange.

[0012] Preferably, a blocking cover is installed on one side of the outside of the Y-type filter, and the blocking cover is connected to the Y-type filter through threaded cooperation, and the blocking cover is used to fix the filter screen.

[0013] Preferably, a filter screen is installed on one side of the Y-type filter near the blocking cover, and the filter screen is used to intercept and filter impurities.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides an electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke marine diesel engine, which has the following beneficial effects:

[0016] The main valve of the utility model is a three-position three-way valve with a fail-safe position and the function of transmitting the valve core displacement signal to the diesel engine control system. The pilot valve is a two-position four-way proportional valve, and the driving structure is a high-frequency voice coil motor. It is equipped with an integrated digital circuit board for driving and controlling the movement of the voice coil motor, and has the function of interacting with various types of signals of the diesel engine control system to facilitate receiving various signal requirements such as control signals of the diesel engine control system, and can meet the requirements of high-frequency response, high precision, fast response and safe position of the injection control valve for marine low-speed two-stroke diesel engines. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model;

[0018] Figure 2 It is a cross-sectional view of a Y-type filter of the utility model;

[0019] Figure 3 This is a block diagram of the external electrical interface of the high-precision electric-controlled multi-way valve of the utility model;

[0020] Figure 4 This is a schematic diagram of the high-precision electronically controlled multi-way valve hydraulic system of the utility model.

[0021] In the figure: 1. Main valve; 2. Pilot valve; 3. Y-type filter; 4. Shield; 5. Filter screen; 6. C port; 7. P port; 8. T port; 9. E port; 10. F port; 11. B port; 12. A port. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a technical solution, an electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke diesel engine for use in a ship, Figure 1 , Figure 2 and Figure 3,include:

[0024] Main valve 1 and pilot valve 2. Main valve 1 is a three-position three-way valve, and pilot valve 2 is a two-position four-way proportional valve. Main valve 1 and pilot valve 2 have the function of receiving various types of control signals from the host control system, and main valve 1 has the function of transmitting valve core displacement signals to the host control system;

[0025] The upper end of the main valve 1 is provided with a C port 6, and both sides of the lower end of the main valve 1 are provided with a P port 7 and a T port 8;

[0026] An E port 9 and an F port 10 are respectively arranged on both sides of the upper end of the pilot valve 2 , and a B port 11 and an A port 12 are respectively arranged on both sides of the lower end of the pilot valve 2 .

[0027] See also Figure 1 and Figure 2 A Y-type filter 3 is provided on one side of the upper end of the main valve 1, and the Y-type filter 3 is connected to the C port 6 through a flange.

[0028] See also Figure 1 and Figure 2 A blocking cover 4 is installed on one side of the outside of the Y-type filter 3, and the blocking cover 4 is connected to the Y-type filter 3 through threaded cooperation, and the blocking cover 4 is used to fix the filter screen 5.

[0029] See also Figure 1 and Figure 2 A filter screen 5 is installed on one side of the Y-type filter 3 near the blocking cover 4, and the filter screen 5 is used to intercept and filter impurities.

[0030] This solution: When the diesel engine is injecting fuel, the high-pressure lubricating oil flows from the A port 12 to the F port 10, and flows out of the F port 10 to push the valve core of the main valve 1 to move so that the P port 7 is connected to the C port 6, and the high-pressure lubricating oil flows from the P port 7 to the C port 6, and the C port 6 is connected to the fuel injection drive mechanism of the diesel engine, so that the high-pressure lubricating oil flows to the fuel injection drive mechanism of the diesel engine, thereby completing the fuel injection. When the diesel engine finishes injecting fuel, the high-pressure lubricating oil in the fuel injection drive mechanism of the diesel engine flows from the C port 6 to the T port 8, and flows back to the lubricating oil system from the T port 8. The F port 10 of the pilot valve 2 is connected to the B port 11, and the high-pressure lubricating oil in the valve flows from the F port 10 to the B port 11, and flows back to the lubricating oil system from the B port 11. When the main valve 1 is in the safe position, the three interfaces of P port 7, T port 8 and C port 6 are not interoperable. The pilot valve 2 receives the control signal of the diesel engine control system, and controls the action of the valve core of the pilot valve 2 through the integrated digital circuit board, thereby controlling the action of the valve core of the main valve 1. The main valve 1 transmits the valve core displacement to the diesel engine control system in real time as the conditional input of the diesel engine control system injection control. The pilot valve 2 also has the function of receiving the power supply signal, safe position signal and other communication signals of the diesel engine control system. According to the injection characteristics of the marine low-speed two-stroke diesel engine, the performance of the pilot valve 2 should meet the following requirements: frequency response under ±5% signal: ≥300Hz, 100% signal step response: ≤4ms, the steady-state error of the valve core displacement of the main valve 1 is controlled at the micron level, and the resolution of the pilot valve 2 is ≤0.3%. Therefore, the driving structure of the pilot valve 2 adopts a high-frequency voice coil motor.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke marine diesel engine, characterized in that: include: A main valve (1) and a pilot valve (2), wherein the main valve (1) is a three-position three-way valve, and the pilot valve (2) is a two-position four-way proportional valve. The main valve (1) and the pilot valve (2) have the function of receiving various types of control signals from a host control system, and the main valve (1) has the function of transmitting a valve core displacement signal to the host control system; The upper end of the main valve (1) is provided with a C port (6), and both sides of the lower end of the main valve (1) are provided with a P port (7) and a T port (8); The upper end of the pilot valve (2) is provided with an E port (9) and an F port (10) on both sides, and the lower end of the pilot valve (2) is provided with a B port (11) and an A port (12) on both sides.

2. The electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke marine diesel engine according to claim 1, characterized in that: A Y-type filter (3) is provided on one side of the upper end of the main valve (1), and the Y-type filter (3) is connected to the C port (6) via a flange.

3. The electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke marine diesel engine according to claim 2, characterized in that: A blocking cover (4) is installed on one side of the outside of the Y-type filter (3), and the blocking cover (4) is connected to the Y-type filter (3) through threaded fitting.

4. The electronically controlled multi-way valve for fuel injection control of a low-speed two-stroke marine diesel engine according to claim 3, characterized in that: A filter screen (5) is installed on one side of the Y-shaped filter (3) close to the blocking cover (4).

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