CN113432882A

CN113432882A - Diesel engine cylinder state monitoring device

Info

Publication number: CN113432882A
Application number: CN202110835625.XA
Authority: CN
Inventors: 刘英杰; 唐伟; 陈超; 方强
Original assignee: CSSC Marine Power Zhenjiang Co Ltd
Current assignee: CSSC Marine Power Zhenjiang Co Ltd
Priority date: 2021-07-23
Filing date: 2021-07-23
Publication date: 2021-09-24

Abstract

The invention discloses a diesel engine cylinder state monitoring device, which comprises a composite piston ring, a cylinder wall temperature sensor, a piston ring abrasion monitoring sensor, a cylinder sleeve abrasion monitoring sensor, a data acquisition module, a data processing module and a PC display module, wherein the composite piston ring comprises a cast iron piston ring base body and a non-magnetic-conductive material embedding ring, the cylinder wall temperature sensor is respectively fixed in the upper ends of two sides of a cylinder sleeve, and the piston ring abrasion monitoring sensor and the cylinder sleeve abrasion monitoring sensor are respectively fixed on the middle parts of two sides of the cylinder sleeve. The invention prolongs the maintenance period of the diesel engine, reduces unnecessary disassembly and assembly and replacement frequency of parts, thereby reducing the operation cost of the diesel engine.

Description

Diesel engine cylinder state monitoring device

Technical Field

The invention relates to a measurement and control device of a diesel engine, in particular to a measurement and control device for automatically monitoring a two-stroke diesel engine, and belongs to the technical field of measurement and control of diesel engines.

Background

The performance of a diesel engine during operation is not only dependent on the structural design and assembly process, but is also closely related to its maintenance. In the existing diesel engine maintenance mode, an operator judges the service life of parts of a diesel engine according to instructions of a product maintenance manual and accumulated experience of the operator, and then performs maintenance or replacement of the parts. The empirical maintenance mode can not accurately judge the abrasion of easily damaged parts such as cylinder sleeves, piston rings and the like under severe working conditions such as high temperature, high pressure and the like, thereby increasing the maintenance workload and causing the waste of unnecessary manpower and material resources.

Disclosure of Invention

The invention aims to provide a diesel engine cylinder state monitoring device, which carries out on-demand maintenance management on a diesel engine through real-time monitoring on operating parameters and parts when a diesel engine cylinder normally operates so as to implement data support of cylinder state real-time monitoring and on-demand maintenance management.

The invention is realized by the following technical scheme:

a diesel engine cylinder state monitoring device comprises a composite piston ring, two cylinder wall temperature sensors, a piston ring abrasion monitoring sensor, a cylinder sleeve abrasion monitoring sensor, a data acquisition module, a data processing module and a PC display module of a control unit, wherein the composite piston ring is one of a plurality of piston rings and comprises a cast iron piston ring base body and a non-magnetic-conductive material embedded ring fixed in the outer peripheral surface of the cast iron piston ring base body, the cylinder wall temperature sensors are respectively fixed in the upper ends of two sides of a cylinder sleeve, and the piston ring abrasion monitoring sensor and the cylinder sleeve abrasion monitoring sensor are respectively fixed on the middle parts of two sides of the cylinder sleeve one above the other; the cylinder wall temperature sensor signal, the piston ring abrasion monitoring sensor signal and the cylinder sleeve abrasion monitoring sensor signal are respectively input into the data acquisition module of the control unit through respective corresponding signal wires, the data acquisition module and the data processing module process the data acquired by each sensor through internal programs and then transmit the processed data to the PC display module through a communication wire, and the processed data are displayed on the PC display module.

The object of the invention is further achieved by the following technical measures.

Furthermore, the cross section of the non-magnetic material embedding ring is triangular; the triangular base ring surface is matched with the peripheral surface of the cast iron piston ring substrate, and the ratio of the base ring surface width A to the cast iron piston ring substrate width B is as follows: A/B = 0.5-0.6. The non-magnetic material embedding ring is made of brass.

Further, the cylinder wall temperature sensor adopts a Cornstedb MB684S115K60 type temperature sensor, and the temperature measuring range is as follows: 50-250 ℃.

Furthermore, the piston ring wear monitoring sensor adopts Consumer IAS-10-A22-S-M12-PA/VAb-Z0E-0, the maximum working period frequency is 1.2 kHz, and the measuring distance is 4 mm.

Further, the cylinder sleeve abrasion monitoring sensor is a film resistance type abrasion sensor, the area from the film resistance to the point is 3mm, and the initial resistance value is 1000 omega.

The invention changes one of the piston rings into a composite piston ring, and embeds a fixed non-magnetic material embedding ring in the peripheral surface of the cast iron piston ring substrate, the width of the non-magnetic material embedding ring can be correspondingly changed along with the abrasion degree of the composite piston ring in the working process, and the abrasion degree of the piston ring can be determined by detecting the width change of the non-magnetic material embedding ring through a piston ring abrasion monitoring sensor. The cylinder wall temperature sensor and the cylinder sleeve abrasion monitoring sensor can respectively detect whether the real-time temperature of the cylinder sleeve and the abrasion loss of the cylinder sleeve exceed standards or not. The invention realizes the uninterrupted monitoring of the operating parameters of the diesel engine during operation and the abrasion and working states of the cylinder parts, and carries out the maintenance management of the diesel engine according to the situation by judging the operating state of the diesel engine and analyzing the abrasion trend of the cylinder parts, thereby prolonging the maintenance period of the diesel engine, reducing the unnecessary disassembly and assembly and the replacement frequency of parts, and further reducing the operating cost of the diesel engine.

Advantages and features of the present invention will be illustrated and explained by the following non-restrictive description of preferred embodiments thereof, given by way of example only with reference to the accompanying drawings.

Drawings

FIG. 1 is a schematic view of the installation of a composite piston ring and sensor of the present invention;

fig. 2 is a schematic diagram of the operation of a piston ring wear monitoring sensor.

Detailed Description

The invention will be further described with reference to the accompanying drawings and two-stroke diesel engine embodiments.

As shown in fig. 1, the present embodiment includes a composite piston ring 10, two cylinder wall temperature sensors 1, a piston ring wear monitoring sensor 2, a cylinder liner wear monitoring sensor 3, and a data acquisition module 201, a data processing module 202, and a PC display module 203 of a control unit 20, the composite piston ring 10 of the present embodiment is the first ring of 4 piston rings, and includes a cast iron piston ring base 101 and a non-magnetic material embedded ring 102, the cross section of the non-magnetic material embedded ring 102 is triangular, and the non-magnetic material embedded ring 102 is embedded and fixed on the middle portion of the outer peripheral surface of the cast iron piston ring base 101 by interference fit. The radial direction of the cast iron piston ring base body 101 and the non-magnetic material embedding ring 102 is provided with allowance, and after the cast iron piston ring base body 101 and the non-magnetic material embedding ring 102 are fixedly connected into a whole, the triangular bottom edge ring surface of the non-magnetic material embedding ring 102 is matched with the outer peripheral surface of the cast iron piston ring base body 101 through finish turning. The ratio of the width A of the triangular base ring surface of the insert ring 102 made of non-magnetic material to the width B of the cast iron piston ring base in the embodiment: a/B = 0.5. The non-magnetic material insert ring 102 is made of brass.

The cylinder wall temperature sensors 1 are respectively fixed in the upper ends of the two sides of the cylinder sleeve 30, the measured values of the two cylinder wall temperature sensors 1 are mutually referenced, meanwhile, the two cylinder wall temperature sensors 1 are mutually standby, and when one of the two cylinder wall temperature sensors fails, the other cylinder wall temperature sensor can still be monitored. The cylinder wall temperature sensor 1 adopts a Cornstedb MB684S115K60 type temperature sensor, and the temperature measuring range is as follows: 50-250 ℃.

The piston ring wear monitoring sensor 2 and the cylinder liner wear monitoring sensor 3 are respectively fixed on the middle parts of two sides of the cylinder liner 30 one above the other. The piston ring wear monitoring sensor 2 adopts Consumer IAS-10-A22-S-M12-PA/VAb-Z0E-0, the maximum working period frequency is 1.2 kHz, and the measuring distance is 4 mm. The cylinder sleeve abrasion monitoring sensor 3 adopts a film resistor type abrasion sensor, the area from the film resistor to the point is 3mm, and the initial resistance value is 1000 omega.

The cylinder wall temperature sensor signal, the piston ring wear monitoring sensor signal and the cylinder sleeve wear monitoring sensor signal are respectively input into the data acquisition module 201 of the control unit 20 through the corresponding signal lines 204, the data acquisition module 201 and the data processing module 202 process the data acquired by each sensor through internal programs and then transmit the processed data to the PC display module 203 through communication lines, and the processed data are displayed on the PC display module 203.

As shown in fig. 2, the piston ring wear monitoring sensor 2 operates as follows: the piston ring wear monitoring sensor 2 monitors the state of the composite piston ring 10 by adopting the principle of electromagnetic induction, when the diesel engine runs, the piston 10A reciprocates up and down, the piston ring also passes through the surface of the piston ring wear monitoring sensor 2, and the waveform of a pulse signal of the piston ring wear monitoring sensor 2 is shown in the lower right corner of a graph 2. When the composite piston ring 10 passes through the piston ring wear monitoring sensor 2, a positive pulse signal a1 is generated at the lower edge of the composite piston ring, a negative pulse signal i1 is generated at the lower edge of the non-magnetic material embedding ring 102, a positive pulse signal i2 is generated at the upper edge of the non-magnetic material embedding ring 102, and a negative pulse signal a2 is generated when the upper edge of the composite piston ring 10 passes through the piston ring wear monitoring sensor 2. The width a of the composite piston ring 10 is a known constant value, the geometric length of the time interval a is also a known constant value, the geometric proportion relation can be determined according to the time proportion relation between a and i, the width of the non-magnetic material embedded ring 102 is B, A/B = a/i, and therefore the wear condition of the piston ring can be determined according to the width B of the non-magnetic material embedded ring 102.

In addition to the above embodiments, the present invention may have other embodiments, and any technical solutions formed by equivalent substitutions or equivalent transformations fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a diesel engine cylinder state monitoring devices which characterized in that: the composite piston ring is one of a plurality of piston rings and comprises a cast iron piston ring base body and a non-magnetic-conductive material embedded ring fixed in the peripheral surface of the cast iron piston ring base body, the cylinder wall temperature sensors are respectively fixed in the upper ends of two sides of the cylinder sleeve, and the piston ring wear monitoring sensor and the cylinder sleeve wear monitoring sensor are respectively fixed on the middle parts of two sides of the cylinder sleeve one above the other; the cylinder wall temperature sensor signal, the piston ring abrasion monitoring sensor signal and the cylinder sleeve abrasion monitoring sensor signal are respectively input into the data acquisition module of the control unit through respective corresponding signal wires, the data acquisition module and the data processing module process the data acquired by each sensor through internal programs and then transmit the processed data to the PC display module through a communication wire, and the processed data are displayed on the PC display module.

2. The diesel engine cylinder condition monitoring device according to claim 1, wherein: the cross section of the non-magnetic material embedding ring is triangular; the triangular base ring surface is matched with the peripheral surface of the cast iron piston ring substrate, and the ratio of the base ring surface width A to the cast iron piston ring substrate width B is as follows: A/B = 0.5-0.6.

3. The diesel engine cylinder condition monitoring device according to claim 1, wherein: the non-magnetic material embedding ring is made of brass.

4. The diesel engine cylinder condition monitoring device according to claim 1, wherein: the cylinder wall temperature sensor adopts a Cornstedb MB684S115K60 type temperature sensor, and the temperature measuring range is as follows: 50-250 ℃.

5. The diesel engine cylinder condition monitoring device according to claim 1, wherein: the piston ring wear monitoring sensor adopts Consumer IAS-10-A22-S-M12-PA/VAb-Z0E-0, the maximum working cycle frequency is 1.2 kHz, and the measuring distance is 4 mm.

6. The diesel engine cylinder condition monitoring device according to claim 1, wherein: the cylinder sleeve abrasion monitoring sensor is a film resistance type abrasion sensor, the area from the film resistance to the point is 3mm, and the initial resistance value is 1000 omega.