Cylinder sleeve abrasion monitoring device, ship low-speed diesel engine and ship

Abstract

The utility model discloses a cylinder sleeve abrasion monitoring device, a ship low-speed diesel engine and a ship, and belongs to the technical field of cylinder sleeve abrasion monitoring. Comprising an ECU controller, an electronic control oil injector, a cooling water circulation system, an oil film thickness sensor, a BN value measuring sensor and a temperature sensor. The oil film thickness sensor is used for collecting oil film thickness information of lubricating oil in a cylinder sleeve and transmitting the oil film thickness information to the ECU controller, and the BN value measuring sensor is used for collecting the BN value of the lubricating oil in the cylinder sleeve and transmitting the BN value to the ECU controller. The temperature sensor is used for collecting the real-time temperature of cooling circulating water in the air cylinder sleeve and transmitting the real-time temperature to the ECU controller, and the ECU controller is in communication connection with the electronic control oil sprayer and the cooling water circulating system. The state of the cylinder sleeve can be comprehensively reflected, and the problems that monitoring parameters are single and the real-time wear state of the cylinder cannot be truly reflected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cylinder liner wear monitoring, in particular to a cylinder liner wear monitoring device, a ship low-speed diesel engine and a ship. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] The cylinder liner is the main component of a low-speed diesel engine. The reciprocating motion of the piston in the cylinder makes the working conditions in the cylinder relatively harsh. At the same time, the cylinder liner may suffer from abnormal wear due to the influence of high temperature, high pressure, corrosion, etc.

[0004] Low-temperature sulfuric acid corrosion is one of the common causes of abnormal wear of cylinder liners in low-speed diesel engines. It is the inevitable result of the use of high-sulfur fuel in marine low-speed diesel engines. The sulfides produced by the combustion of high-sulfur fuel are affected by factors such as air humidity, cylinder liner water temperature, and scavenging temperature. They will form sulfurous acid and sulfuric acid, forming black spots on the surface of the cylinder liner, affecting the normal use of the cylinder oil, causing serious corrosion to the piston ring and cylinder liner, and causing abnormal wear.

[0005] The factors affecting low-temperature sulfuric acid corrosion are relatively complex, including the BN value of the cylinder oil, the cylinder oil film thickness, the cylinder oil supply strategy, the scavenging humidity and the cylinder liner cooling circulating water temperature, etc. Among them, the cylinder oil film thickness can directly reflect the wear state of the cylinder liner. The existing cylinder liner wear monitoring generally monitors the cylinder oil film thickness through sensors, but a single parameter monitoring often cannot truly and comprehensively reflect the real-time operating state of the cylinder liner. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the embodiments of the utility model is to provide a cylinder liner wear monitoring device, a ship low-speed diesel engine and a ship, so as to solve the problem that the cylinder liner monitoring parameters are single and cannot reflect the actual operating status of the cylinder liner.

[0007] In a first aspect, the utility model provides a cylinder liner wear monitoring device:

[0008] A cylinder liner wear monitoring device, comprising an ECU controller, an electronically controlled fuel injector, a cooling water circulation system, an oil film thickness sensor, a BN value measurement sensor and a temperature sensor;

[0009] The oil film thickness sensor is used to collect the oil film thickness information of the lubricating oil in the cylinder liner and transmit it to the ECU controller, the BN value measurement sensor is used to collect the BN value of the lubricating oil in the cylinder liner and transmit it to the ECU controller, the temperature sensor is used to collect the real-time temperature of the cooling circulating water in the cylinder liner and transmit it to the ECU controller, and the ECU controller is respectively communicated with the electronically controlled injector and the cooling water circulation system.

[0010] By adopting the above technical scheme, the real-time temperature of the cooling circulating water in the cylinder liner is an important parameter affecting the wear performance between the cylinder liner and the piston, and is also a monitoring parameter for the cylinder liner wear; if the cylinder liner is worn, it will affect the lubrication state of the lubricating oil in the cylinder, therefore, the actual state of the lubricating oil is reflected by the thickness signal and BN value information of the lubricating oil, and then the wear state of the cylinder liner is reflected; in view of the measurement error and transmission error that may exist in real-time monitoring and the limitations of a single monitoring parameter, the utility model realizes comprehensive monitoring of the cylinder liner wear through the above three monitoring parameters, so as to truly and comprehensively reflect the operating state of the cylinder liner.

[0011] In some embodiments, the electronically controlled fuel injector comprises a fuel injection nozzle, a fuel injector body and a solenoid valve;

[0012] The fuel injection nozzle is connected to the fuel outlet end of the fuel injector body, and the fuel inlet end of the fuel injector body is communicated with the cylinder sleeve; the solenoid valve is arranged on the fuel injector body.

[0013] In some embodiments, the solenoid valve is electrically connected to the ECU controller.

[0014] In some embodiments, the cooling water circulation system includes a cooling water channel, and the cooling water channel is disposed inside the cylinder liner.

[0015] In some implementations, an alarm instrument is further included, and the ECU controller is communicatively connected to the alarm instrument.

[0016] In some embodiments, the oil film thickness sensor is arranged on the cylinder liner and close to the lubricating oil return outlet of the cylinder liner, the BN value measurement sensor is arranged on the lubricating oil outlet pipeline of the cylinder liner, and the temperature sensor is arranged on the cooling water inlet pipeline of the cylinder liner.

[0017] In some embodiments, the oil film thickness sensor is detachably connected to the cylinder liner via screws, the BN value measurement sensor is detachably connected to the lubricating oil outlet pipeline via screws, and the temperature sensor is detachably connected to the cooling water inlet pipeline via screws.

[0018] In some embodiments, the oil film thickness sensor is an Infralytic oil film thickness sensor NG2, the BN value measurement sensor is an inzoc-ISL-Z2 lubricating oil multifunctional sensor, and the temperature sensor is an inzoc-ISL-Z2 lubricating oil multifunctional sensor.

[0019] In a second aspect, the utility model provides a low-speed marine diesel engine;

[0020] A low-speed marine diesel engine comprises the above-mentioned cylinder liner wear monitoring device.

[0021] In a third aspect, the utility model provides a ship;

[0022] A ship comprises the above-mentioned cylinder liner wear monitoring device or the above-mentioned ship low-speed diesel engine.

[0023] The technical solution provided by the utility model has at least the following technical effects or advantages:

[0024] 1. The technical solution provided by the utility model uses an oil film thickness sensor to monitor the oil film thickness information of the lubricating oil in the cylinder liner, uses a BN value measurement sensor to monitor the BN value of the lubricating oil in the cylinder liner, and uses a temperature sensor to monitor the real-time temperature of the cooling circulating water in the cylinder liner. It can comprehensively monitor the operation of the cylinder liner and provide comprehensive and accurate data support for cylinder liner wear monitoring.

[0025] 2. The technical solution provided by the utility model realizes "pre-emptive" real-time monitoring of the operating status of the cylinder liner. When the oil film thickness information is less than a preset threshold, an alarm is issued through an alarm instrument to remind the operator to pay attention to the wear of the cylinder liner. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0027] Figure 1 It is a schematic diagram of the system architecture provided by an embodiment of the utility model;

[0028] In the figure: 1. Cylinder liner; 2. Oil film thickness sensor; 3. BN value measurement sensor; 4. Temperature sensor; 5. Cooling water circulation system.

[0029] In order to show the positions of various parts, the distances or sizes between them are exaggerated and the schematic diagram is for reference only. DETAILED DESCRIPTION

[0030] It should be noted that the following detailed descriptions are all illustrative and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0031] Terminology explanation:

[0032] BN value: Base Number (BN) is an indicator used to measure the content of alkaline components in lubricating oil. It indicates the ability of the alkaline substances contained in one gram of lubricating oil to neutralize the acid equivalent to how many milligrams of potassium hydroxide (KOH).

[0033] Embodiment 1

[0034] As introduced in the background technology, the detection parameters of the operating status of the cylinder liner 1 in the prior art are too single and cannot fully and truly reflect its operating status. In order to solve the above technical problems, the utility model proposes a cylinder liner 1 wear monitoring device.

[0035] Combination Figure 1 The cylinder liner 1 wear monitoring device includes an ECU controller, an electronically controlled fuel injector, a cooling water circulation system 5, an oil film thickness sensor 2 installed near the outer wall of the lubricating oil return outlet of the cylinder liner 1, a BN value measurement sensor 3 installed on the lubricating oil outlet pipeline of the cylinder liner 1, and a temperature sensor 4 installed on the cooling water inlet pipeline of the cylinder liner 1. The electronically controlled fuel injector includes a fuel injector nozzle, a fuel injector body and a solenoid valve; the fuel injector nozzle is connected to the oil outlet end of the fuel injector body, the oil inlet end of the fuel injector body is connected to the cylinder liner 1, and the solenoid valve is installed on the fuel injector body; the fuel injector nozzle is located on the outer wall of the middle part of the cylinder liner 1, and the lubricating oil is sprayed into the cylinder through the fuel injector nozzle.

[0036] The data output ends of the oil film thickness sensor 2, the BN value measurement sensor 3 and the temperature sensor 4 are respectively connected to the ECU controller through signal lines, the ECU controller is electrically connected to the solenoid valve, and the ECU controller is communicatively connected to the controller of the cooling water circulation system 5 through the signal line.

[0037] In order to realize comprehensive real-time monitoring of the operating status of the cylinder liner 1, in this embodiment, an oil film thickness sensor 2 is installed on the outer wall of the cylinder liner 1, a BN value measurement sensor 3 is installed in the lubricating oil outlet pipeline of the cylinder liner 1, and a temperature sensor 4 is installed in the cooling water inlet pipeline of the cylinder liner 1, so as to detect the operating abnormality of the cylinder liner 1 in advance.

[0038] Among them, the real-time temperature of the cooling circulating water will directly affect the working state of the cylinder lubricating oil and the wear condition in the cylinder, and is an important monitoring parameter and control parameter for controlling the wear performance between the cylinder liner and the piston; the BN value is a basic parameter to ensure good lubrication performance in the cylinder. During the operation of the engine, a cylinder lubricating oil with a fixed BN value is usually used. If the BN value or the oil film thickness changes, it means that the state of the lubricating oil in the cylinder has changed, and the cylinder liner 1 may be worn.

[0039] The working method of this embodiment is as follows:

[0040] The oil film thickness sensor 2 is used to collect the oil film thickness information of the lubricating oil in the cylinder liner 1 and transmit it to the ECU controller. The BN value measurement sensor 3 is used to collect the BN value of the lubricating oil in the cylinder liner 1 and transmit it to the ECU controller. The temperature sensor 4 is used to collect the real-time temperature of the cooling circulating water in the cylinder liner 1 and transmit it to the ECU controller. The operator can view the oil film thickness information, BN value information and cooling water circulation temperature of the lubricating oil in the cylinder liner 1 in real time through the ECU controller, and fully understand the operating status of the cylinder liner 1.

[0041] The ECU controller can also control the electronic fuel injector and the cooling water circulation system 5 according to the oil film thickness information, BN value, the real-time temperature of the cooling circulating water and the preset threshold value. For example, when the oil film thickness information is less than the preset oil film thickness threshold value and the BN value is greater than 40, an electrical signal is sent to control the solenoid valve opening to increase so as to increase the cylinder oil supply rate; when the oil film thickness information is less than the preset threshold value, the BN value is less than or equal to 40 and the real-time temperature of the cooling circulating water is less than 75 degrees, an electrical signal is sent to the PLC controller of the cooling water system to increase the temperature of the cooling circulating water; this is a common function of the ECU controller and will not be repeated here.

[0042] In this embodiment, the model of the oil film thickness sensor 2 is the German Infralytic oil film thickness sensor 2NG2, the model of the BN value measurement sensor 3 is the inzoc-ISL-Z2 lubricating oil multifunctional sensor, the model of the temperature sensor 4 is the danfoss MBT 3560, and the cooling water circulation system 5 is a cooling water circulation system 5 commonly used in diesel engines in the prior art, including a cooling water channel (i.e., a cooling water inlet pipeline) and other components. The cooling water channel is installed inside the cylinder liner 1, and the heat dissipation of the cylinder liner 1 is achieved through the circulation of cooling water; the cylinder liner 1 is also a common ship low-speed diesel engine cylinder liner 1 in the prior art, and this embodiment has not made any improvements to it, so it will not be repeated here.

[0043] In some embodiments, in order to enable the operating personnel to promptly discover the abnormality of the cylinder liner 1, an alarm instrument is also included. The ECU controller is electrically connected to the alarm instrument through a signal line. When the oil film thickness information of the lubricating oil in the cylinder liner 1 is less than a preset alarm threshold, it indicates that the lubrication condition in the cylinder is abnormal. The ECU controller sends an alarm electrical signal to the alarm instrument, and the alarm instrument issues an alarm prompt.

[0044] In this embodiment, the alarm instrument is an instrument built into the ship's wheelhouse.

[0045] In some embodiments, in order to facilitate replacement of sensors, the oil film thickness sensor 2 is detachably connected to the cylinder liner 1 by screws, the BN value measurement sensor 3 is detachably connected to the lubricating oil outlet pipeline by screws, and the temperature sensor 4 is detachably connected to the cooling water inlet pipeline by screws.

[0046] Embodiment 2

[0047] Based on the above-mentioned cylinder liner 1 wear monitoring device, this embodiment provides a low-speed marine diesel engine, and the cylinder liner 1 of the low-speed marine diesel engine is provided with the cylinder liner 1 wear monitoring device described in the above-mentioned embodiment. Since the above-mentioned cylinder liner 1 wear monitoring device has the above-mentioned technical effect, the technical effect of the low-speed marine diesel engine using the cylinder liner 1 wear monitoring device please refer to the above-mentioned embodiment.

[0048] Embodiment 3

[0049] Based on the above-mentioned ship low-speed diesel engine, an embodiment of the utility model also provides a ship, on which is the ship low-speed diesel engine described in the above-mentioned embodiment. Since the above-mentioned ship low-speed diesel engine has the above-mentioned technical effects, the technical effects of the ship using the ship low-speed diesel engine please refer to the above-mentioned embodiment.

[0050] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A cylinder liner wear monitoring device, It is characterized in that Including ECU controller, electronic fuel injector, cooling water circulation system, oil film thickness sensor, BN value measurement sensor and temperature sensor; The oil film thickness sensor is used to collect the oil film thickness information of the lubricating oil in the cylinder liner and transmit it to the ECU controller, the BN value measurement sensor is used to collect the BN value of the lubricating oil in the cylinder liner and transmit it to the ECU controller, the temperature sensor is used to collect the real-time temperature of the cooling circulating water in the cylinder liner and transmit it to the ECU controller, and the ECU controller is respectively communicated with the electronically controlled injector and the cooling water circulation system.

2. The cylinder liner wear monitoring device according to claim 1, It is characterized in that The electronically controlled fuel injector comprises a fuel injection nozzle, a fuel injector body and a solenoid valve; The fuel injection nozzle is connected to the fuel outlet end of the fuel injector body, and the fuel inlet end of the fuel injector body is communicated with the cylinder sleeve; the solenoid valve is arranged on the fuel injector body.

3. The cylinder liner wear monitoring device according to claim 2, It is characterized in that The solenoid valve is electrically connected to the ECU controller.

4. The cylinder liner wear monitoring device according to claim 1, It is characterized in that The cooling water circulation system comprises a cooling water channel, and the cooling water channel is arranged inside the cylinder liner.

5. The cylinder liner wear monitoring device according to claim 1, It is characterized in that It also includes an alarm instrument, and the ECU controller is communicatively connected with the alarm instrument.

6. The cylinder liner wear monitoring device according to claim 1, It is characterized in that The oil film thickness sensor is arranged on the cylinder liner and close to the lubricating oil return outlet of the cylinder liner, the BN value measurement sensor is arranged on the lubricating oil outlet pipeline of the cylinder liner, and the temperature sensor is arranged on the cooling water inlet pipeline of the cylinder liner.

7. The cylinder liner wear monitoring device according to claim 6, It is characterized in that The oil film thickness sensor is detachably connected to the cylinder sleeve via screws, the BN value measurement sensor is detachably connected to the lubricating oil outlet pipeline via screws, and the temperature sensor is detachably connected to the cooling water inlet pipeline via screws.

8. The cylinder liner wear monitoring device according to claim 1, It is characterized in that The model of the oil film thickness sensor is Infralytic oil film thickness sensor NG2, the model of the BN value measurement sensor is inzoc-ISL-Z2 lubricating oil multifunctional sensor, and the model of the temperature sensor is inzoc-ISL-Z2 lubricating oil multifunctional sensor.

9. A low-speed marine diesel engine, It is characterized in that The invention comprises a cylinder liner wear monitoring device as claimed in any one of claims 1 to 8.

10. A vessel, It is characterized in that It comprises the cylinder liner wear monitoring device according to any one of claims 1 to 8 or the ship low-speed diesel engine according to claim 9.

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