CN210977719U - Air circulation system of high-pressure common-rail explosion-proof diesel engine - Google Patents

Abstract

The utility model relates to an air circulation system of a high-pressure common-rail explosion-proof diesel engine, which is characterized by comprising an air inlet system, an exhaust system and an air circuit of an explosion-proof diesel engine main body positioned between the air inlet system and the exhaust system; the air inlet system sequentially comprises an air filter, an explosion-proof supercharger, an inter-cooling device, an air inlet air door assembly, an air inlet flame arrester and an explosion-proof air inlet manifold from front to back; the exhaust system comprises an explosion-proof exhaust manifold and an explosion-proof supercharger till a tail gas treatment box in sequence from the front to the back, an exhaust port of the explosion-proof exhaust manifold is connected with a return air port of the explosion-proof supercharger, and an exhaust port of the explosion-proof supercharger is connected with an air inlet of the tail gas treatment box through an exhaust corrugated pipe. The utility model discloses carry out explosion-proof transformation with the high pressure common rail diesel engine system that has used widely on land, be applicable to borehole operation, form a new high pressure common rail explosion-proof diesel engine air circulating system, have energy saving and emission reduction, the noise reduction improves the advantage of security performance.

Description

Air circulation system of high-pressure common-rail explosion-proof diesel engine

Technical Field

The utility model relates to an explosion-proof diesel engine air circulation system of high pressure common rail.

Background

The first generation of the fuel injection system adopted by the high-power diesel engine is a control mode of a mechanical fuel injection pump and a speed regulator, the fuel injection quantity is controlled by changing the position of a rack of the fuel injection pump through the speed regulator, and the high pressure of injection is generated by a cam of an oil pump; the second generation is a control mode of an electric control injection pump and an electric injection controller, the starting point and the injection quantity of oil injection can be flexibly controlled by controlling the opening time and the opening duration of an electromagnetic valve of the electric control pump, and the high pressure of injection is generated by an oil pump cam.

The latest fuel injection technology is a third generation high-pressure common rail fuel injection system, a fuel injection pump independently installed near each cylinder of a diesel engine is omitted, the high pressure of fuel injection is generated by the independent high-pressure common rail pump, high-pressure fuel is conveyed to each cylinder by a high-pressure common rail pipe, and the control of fuel injection is realized by driving an electric control fuel injector installed in each cylinder by an electronic injection controller.

The working process of the diesel engine is the same as that of the gasoline engine, and each working cycle also goes through four strokes of air intake, compression, work application and exhaust. However, the fuel for diesel engine is diesel oil, which has higher viscosity than gasoline and is not easy to evaporate, and its self-ignition temperature is lower than gasoline, so the formation and ignition mode of combustible mixture are different from that of gasoline engine.

The diesel engine sucks pure air in an intake stroke. When the compression stroke is close to the end, the oil pressure of the diesel oil is increased to more than 10MPa through an oil injection pump, the diesel oil is injected into the cylinder through an oil injector, and the diesel oil is mixed with the compressed high-temperature air in a short time to form combustible mixed gas. Because the compression ratio of the diesel engine is high (generally 16-22), the air pressure in the cylinder can reach 3.5-4.5MPa and the temperature can reach 750-1000K at the same time when the compression is finished (while the mixed air pressure of the gasoline engine at the moment can reach 0.6-1.2MPa and the temperature can reach 600-700K), which greatly exceeds the self-ignition temperature of the diesel oil. Therefore, after the diesel oil is injected into the cylinder, the diesel oil is mixed with the air in a short time and then is immediately ignited and combusted. The air pressure in the cylinder rises to 6-9MPa rapidly, and the temperature also rises to 2000-2500K. Under the push of high-pressure gas, the piston moves downwards and drives the crankshaft to rotate to do work, and the waste gas is exhausted into the atmosphere through the exhaust pipe.

The common diesel engine is driven by an engine camshaft, and diesel oil is delivered to a fuel chamber of each cylinder by a high-pressure oil pump. This fuel supply method is changed according to the change of the engine speed, and the optimum fuel supply amount at various speeds cannot be achieved. The common rail injection system of the electric control diesel engine which is more and more commonly adopted at present can better solve the problem.

The common rail injection type oil supply system consists of a high-pressure oil pump, a public oil supply pipe, an oil injector, an Electronic Control Unit (ECU) and a plurality of pipeline pressure sensors, wherein each oil injector in the system is connected with the public oil supply pipe through a respective high-pressure oil pipe, and the public oil supply pipe plays a hydraulic pressure accumulation role on the oil injector. When the high-pressure oil pump works, fuel oil is conveyed to the public oil supply pipe by the high pressure oil pump, the high-pressure oil pump, the pressure sensor and the ECU form closed-loop work, the oil pressure in the public oil supply pipe is accurately controlled, and the phenomenon that the oil supply pressure changes along with the rotating speed of an engine is thoroughly changed. The method is mainly characterized by comprising the following three aspects:

1. the fuel injection timing is completely separated from the fuel metering, and the fuel injection pressure and the fuel injection process are timely controlled by the ECU.

2. The pressure, initial point and duration of oil injection of each cylinder can be adjusted according to the working condition of the engine, so that the optimal control point of oil injection is pursued.

3. Can realize high oil injection pressure and can realize the pre-injection of diesel oil.

Because the high-pressure common rail diesel engine system is already used on the land and has better effect, but the equipment for working under the condition is still generally provided with the traditional diesel engine system, how to perform explosion-proof transformation on the high-pressure common rail diesel engine system which is already widely used on the land is suitable for underground operation, and the formation of a new high-pressure common rail explosion-proof diesel engine system is particularly important. In view of this, it is necessary to develop an air circulation system of a high-pressure common-rail explosion-proof diesel engine, which meets the requirements of air intake and exhaust under the working conditions of downhole operation.

Disclosure of Invention

An object of the utility model is to overcome above-mentioned not enough, provide and carry out explosion-proof transformation with the high pressure common rail diesel engine system that has used widely on land, be applicable to borehole operation, form a new high pressure common rail explosion-proof diesel engine air circulation system.

The purpose of the utility model is realized like this:

an air circulation system of a high-pressure common-rail explosion-proof diesel engine comprises an air inlet system, an exhaust system and an air path of an explosion-proof diesel engine main body between the air inlet system and the exhaust system;

the air inlet system sequentially comprises an air filter, an explosion-proof supercharger, an intercooling device, an air inlet air door assembly, an air inlet flame arrester and an explosion-proof air inlet manifold from front to back, wherein an air outlet of the air filter is connected with an air inlet of the explosion-proof supercharger;

the exhaust system comprises an explosion-proof exhaust manifold and an explosion-proof supercharger till a tail gas treatment box in sequence from the front to the back, an exhaust port of the explosion-proof exhaust manifold is connected with a return air port of the explosion-proof supercharger, and an exhaust port of the explosion-proof supercharger is connected with an air inlet of the tail gas treatment box through an exhaust corrugated pipe.

Preferably, the air inlet door assembly comprises a door pipeline, an air inlet and an air outlet of the door pipeline are respectively provided with an air inlet connecting flange and an air outlet connecting flange, the top of the outer side of the door pipeline is vertically connected with a door supporting seat in the horizontal direction, an air door cylinder is arranged above the door supporting seat, and a circular air door matched with the inner wall of the door pipeline is arranged in the door pipeline.

Preferably, the air door is upwards connected with an air door rotating rod, the air door rotating rod upwards extends out of the air door pipeline and the air door supporting seat, and the telescopic end of the air door cylinder is connected with the upper end of the air door rotating rod through a swing rod.

As a preferred, the tail gas treatment box includes the tail gas treatment box, the right side section in the tail gas treatment box is the section of admitting air, left side section in the tail gas treatment box is the section of giving vent to anger, and the section of admitting air separates through a baffle with giving vent to anger between the section, the inside wall around the tail gas treatment box is connected respectively at both ends around the baffle, the upper and lower inside wall that the upper and lower both ends of baffle left the tail gas treatment box respectively has one section distance.

Preferably, the right section of the top plate of the tail gas treatment box body is provided with an air inlet flange, the air inlet flange is connected with a tail gas inlet pipe towards the tail gas treatment box body, the lower end of the tail gas inlet pipe is away from the bottom of the tail gas treatment box body by a certain distance, the periphery of the middle lower section of the tail gas inlet pipe is surrounded by a first waste gas pipe, the bottom of the first waste gas pipe is contacted with the bottom of the tail gas treatment box body, a tail gas cover plate is arranged on the tail gas inlet pipe above the first waste gas pipe, the tail gas cover plate is away from the first waste gas pipe by a certain distance, the periphery of the tail gas cover plate is downwards connected with a second waste gas pipe, the pipe diameter of the second waste gas pipe is larger than the pipe diameter of the first waste gas pipe, the height of the lower port of the second waste gas pipe is lower than the height of the upper port of the first, the pipe diameter of the third waste gas pipe is smaller than that of the first waste gas pipe.

Preferably, a flow equalizing air guide mechanism is arranged at an air outlet at the lower end of the tail gas inlet pipe, and the flow equalizing air guide mechanism is composed of a plurality of flow equalizing air guide plates with the same structure.

As an optimization, the air guide piece that flow equalizes includes the rectangle sheet structure of upper segment and the arc sheet structure of hypomere, and the rectangle sheet structure of the air guide piece that flow equalizes of multi-disc is the form welding that the center disperses, and the arc sheet structure of the air guide piece that flow equalizes is clockwise bending from overlooking the angle, and the outward flange and the rectangle sheet structure outward flange of arc sheet structure are tangent, and the inner edge department of arc sheet structure is provided with the arc breach, the lower extreme of the air guide mechanism that flow equalizes stretches out below the end opening of tail gas intake pipe, the rectangle sheet structure outward flange and the tail gas intake pipe internal connection of the air guide piece that flow equalizes of the.

Preferably, the lower part of the third waste gas pipe is uniformly provided with a third waste gas pipe notch of a rectangular structure which is concavely arranged upwards, the lower part of the first waste gas pipe is uniformly provided with a first waste gas pipe notch of a rectangular structure which is concavely arranged upwards, the third waste gas pipe notch and the first waste gas pipe notch are arranged in a staggered manner, the height of the third waste gas pipe notch is smaller than that of the first waste gas pipe notch, preferably, the third waste gas pipe notch and the first waste gas pipe notch are four, a circular baffle is arranged inside the third waste gas pipe, and the height of the circular baffle is consistent with the top height of the third waste gas pipe notch.

Preferably, the circular baffle is provided with a plurality of vent holes which are vertically communicated, and the positions of the vent holes correspond to the positions of the notches of the first exhaust pipe, namely the positions of the vent holes are staggered with the positions of the notches of the third exhaust pipe.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses carry out explosion-proof transformation with the high pressure common rail diesel engine system that has used widely on land, be applicable to borehole operation, form a new high pressure common rail explosion-proof diesel engine air circulating system, have energy saving and emission reduction, the noise reduction improves the advantage of security performance.

Drawings

Fig. 1 is a structural schematic diagram of a high-pressure common-rail explosion-proof diesel engine system.

Fig. 2 is another view of fig. 1.

Fig. 3 is a schematic diagram of the high-pressure common rail system mounted on the explosion-proof diesel engine main body.

FIG. 4 is a schematic diagram of a high pressure common rail system.

Fig. 5 is a schematic diagram of the intercooler device and the radiator tank.

Fig. 6 is another view of fig. 5.

Fig. 7 is a schematic view of an intercooler device.

FIG. 8 is a schematic view of a tail gas treatment tank.

FIG. 9 is a front view of the exhaust treatment housing of FIG. 8 with the front panel removed.

FIG. 10 is a perspective view of the exhaust treatment housing of FIG. 8 with the front panel removed.

FIG. 11 is a front view, in half section, of an intake section within the exhaust treatment housing.

Fig. 12 is a perspective view, in half section, of the intake section within the exhaust treatment housing.

FIG. 13 is another perspective view of the intake section within the exhaust treatment housing.

FIG. 14 is a schematic view of a flow equalization gas guide mechanism.

Fig. 15 is a schematic view of the mounting of the anti-explosion barrier to the barrier mount.

Fig. 16 is a schematic view of an explosion-proof fence.

FIG. 17 is a schematic view of a bar compact.

FIG. 18 is a schematic view of an intake damper assembly.

Fig. 19 is a table for selecting rail pressure.

Fig. 20 is a table for selecting the base injection angle.

Fig. 21 is a table for selecting a water temperature correction injection angle.

Wherein:

explosion-proof diesel engine main body 100, explosion-proof intake manifold 101 and explosion-proof exhaust manifold 102

The high-pressure common rail system 200, a common rail pipeline 201, an oil outlet pipeline 202, an oil nozzle 203, an electromagnetic valve 204, an oil inlet pipeline 205, an oil return pipeline 206 and an oil pump 207

Air filter 300

Explosion-proof supercharger 400

The device comprises an intercooling device 500, an intercooling heat exchange chamber body 501, a connecting angle steel 502, an intercooling first interface 503 and an intercooling second interface 504;

the device comprises a tail gas treatment box 600, a tail gas treatment box body 601, a partition plate 602, a gas inlet flange 603, a tail gas inlet pipe 604, a first waste gas pipe 605, a first waste gas pipe notch 605.1, a tail gas cover plate 606, a second waste gas pipe 607, a third waste gas pipe 608, a third waste gas pipe notch 608.1, a flow equalizing and gas guiding mechanism 609, a circular baffle 610, a vent hole 610.1, a fence seat 611, a fence pressing mechanism 612, a hinge column 612.1, a threaded column 612.2, a pressing bar 612.3, a pin 612.4, a nut 612.5, a guide plate 612.6, a guide column 612.7, a compression spring 612.8, a bar-shaped pressing block 612.9, a pressing block pin 612.10, an explosion-proof fence 613, a limiting column 614, a pressing plate 615, a fence upper cover plate 616, a waste gas pipe 617, a floating ball 618, a floating ball connecting pin 619, a floating ball screw 620, a water replenishing connecting rod 621, a water replenishing valve 622, a water replenishing seat;

air intake system 700, first supercharged air inlet pipe 701 and second supercharged air inlet pipe 702

Exhaust system 800

The air inlet damper comprises an air inlet damper assembly 900, a damper pipeline 901, an air inlet connecting flange 902, an air outlet connecting flange 903, a damper support seat 904, a damper cylinder 905, a damper 906, a damper rotating rod 907 and a swing rod 908;

air intake flame arrester 1000

An explosion-proof exhaust manifold cooling water path 1100, an explosion-proof exhaust manifold water supply pump water inlet pipeline 1101, an explosion-proof exhaust manifold water supply pump 1102, an explosion-proof exhaust manifold water supply pump water outlet pipeline 1103, an explosion-proof supercharger water inlet pipeline 1104, an explosion-proof supercharger water outlet pipeline 1105 and an exhaust bellows water return pipeline 1106

Exhaust bellows 1200

Explosion-proof diesel engine main body cooling water path 1300

The heat-dissipating water tank comprises a heat-dissipating water tank 1400, a core 1401, a heat-dissipating water tank top shell 1402, a heat-dissipating water tank bottom shell 1403, a heat-dissipating water tank left side plate 1404, a heat-dissipating water tank right side plate 1405, an upper sealing gasket 1406, a multiple water filling port cover 1407, a lower sealing gasket 1408, a water discharging switch 1409, a handle 1410, a heat-dissipating water tank support base 1411 and an air guide cover 1412.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to 18, the high pressure common rail explosion-proof diesel engine system according to the present invention comprises an explosion-proof diesel engine main body 100, a high pressure common rail system 200, an air filter 300, an explosion-proof supercharger 400, an inter-cooling device 500, an exhaust gas treatment tank 600 and a heat radiation water tank 1400, wherein the above components are connected by a plurality of air pipelines and a plurality of water pipelines; the inter-cooling device 500 and the heat radiation water tank 1400 are installed as a whole;

an explosion-proof intake manifold 101 is arranged at the air inlet end of the explosion-proof diesel engine main body 100, an explosion-proof exhaust manifold 102 is arranged at the exhaust end of the explosion-proof diesel engine main body 100, all air pipelines connected in front of the explosion-proof intake manifold 101 are collectively called an air inlet system 700, and all air pipelines connected behind the explosion-proof exhaust manifold 102 are collectively called an exhaust system 800; the air inlet system 700, the air outlet system 800 and the air path of the explosion-proof diesel engine main body 100 positioned between the air inlet system and the air outlet system form the whole air circulation system of the high-pressure common-rail explosion-proof diesel engine;

the air inlet system 700 sequentially comprises an air filter 300, an explosion-proof supercharger 400, an intercooling device 500, an air inlet air door assembly 900, an air inlet flame arrester 1000 and an explosion-proof air inlet manifold 101 from front to back, wherein an air outlet of the air filter 300 is connected with an air inlet of the explosion-proof supercharger 400, a supercharging air outlet of the explosion-proof supercharger 400 is connected with an air inlet of the intercooling device 500 through a first supercharging air inlet pipe 701, an air outlet of the intercooling device 500 is connected with an air inlet of the air inlet air door assembly 900 through a second supercharging air inlet pipe 702, an air outlet of the air inlet air door assembly 900 is connected with an air inlet of the air inlet flame arrester 1000, and an air outlet of the air inlet flame;

the exhaust system 800 comprises an explosion-proof exhaust manifold 102, an explosion-proof supercharger 400 and a tail gas treatment box 600 from front to back in sequence, an exhaust port of the explosion-proof exhaust manifold 102 is connected with a return air port of the explosion-proof supercharger 400, and an exhaust port of the explosion-proof supercharger 400 is connected with an air inlet of the tail gas treatment box 600 through an exhaust bellows 1200;

an explosion-proof exhaust manifold cooling water path 1100 is led out from a first water outlet end at the bottom of the heat radiation water tank 1400, and the explosion-proof exhaust manifold cooling water path 1100 returns to a first water return end at the top of the heat radiation water tank 1400 after passing through a plurality of components; wherein the explosion-proof exhaust manifold cooling water path 1100 sequentially comprises an explosion-proof exhaust manifold water supply pump water inlet pipeline 1101, an explosion-proof exhaust manifold water supply pump 1102, an explosion-proof exhaust manifold water supply pump water outlet pipeline 1103, an explosion-proof exhaust manifold 102, an explosion-proof supercharger water inlet pipeline 1104, an explosion-proof supercharger 400, an explosion-proof supercharger water outlet pipeline 1105, an exhaust bellows 1200 and an exhaust bellows water return pipeline 1106 from front to back, the water inlet end of the explosion-proof exhaust manifold water supply pump water inlet pipeline 1101 is connected with a first water outlet end at the bottom of the radiating water tank 1400, the water outlet end of the explosion-proof exhaust manifold water supply pump water inlet pipeline 1101 is connected with the water inlet end of the explosion-proof exhaust manifold water supply pump 1102, the water outlet end of the explosion-proof exhaust manifold water supply pump 1102 is connected with the water inlet end of the explosion-proof exhaust manifold water supply pump water outlet pipeline 1103, the, the water outlet end of the explosion-proof exhaust manifold 102 is connected with the water inlet end of an explosion-proof supercharger water inlet pipeline 1104, the water outlet end of the explosion-proof supercharger water inlet pipeline 1104 is connected with the water inlet end of an explosion-proof supercharger 400, the water outlet end of the explosion-proof supercharger 400 is connected with the water inlet end of an explosion-proof supercharger water outlet pipeline 1105, the water outlet end of the explosion-proof supercharger water outlet pipeline 1105 is connected with the water inlet end of an outer water jacket of an exhaust corrugated pipe 1200, the water outlet end of the outer water jacket of the exhaust corrugated pipe 1200 is connected with the water inlet end of an exhaust corrugated pipe water return pipeline 1106, and the water outlet end of the exhaust corrugated pipe water;

the high-pressure common rail system 200 comprises a common rail pipe 201, four oil outlet pipes 202 are connected to the common rail pipe 201, the four oil outlet pipes 202 are respectively connected with four oil nozzles 203, electromagnetic valves 204 are arranged on the oil nozzles, the oil nozzles 203 are arranged on oil inlets of all cylinder bodies of the explosion-proof diesel engine main body 100, an oil inlet pipe 205 and an oil return pipe 206 are further connected to the common rail pipe 201, the oil inlet pipe 205 and the oil return pipe 206 are respectively connected with an oil outlet and an oil return port of an oil pump 207, and the oil pump 207 is connected with an oil tank.

A second water outlet end at the bottom of the heat radiation water tank 1400 leads out an explosion-proof diesel engine main body cooling water path, and the explosion-proof diesel engine main body cooling water path returns to a second water return end at the top of the heat radiation water tank 1400 after passing through a plurality of components; the cooling water path of the main body of the explosion-proof diesel engine sequentially comprises a water inlet pipeline of the main body of the explosion-proof diesel engine, a water supply pump of the main body of the explosion-proof diesel engine, a water path inside the main body of the explosion-proof diesel engine, a temperature controller and a water return pipeline of the main body of the explosion-proof diesel engine from front to back;

the intercooling device 500 comprises an intercooling heat exchange chamber body 501, connecting angle steels 502 are arranged on the left side and the right side of the intercooling heat exchange chamber body 501, the intercooling heat exchange chamber body 501 is connected to one surface, far away from the explosion-proof diesel engine body 100, of the heat dissipation water tank 1400 through the two connecting angle steels 502, an intercooling first interface 503 and an intercooling second interface 504 are arranged on the top of the intercooling heat exchange chamber body 501, wherein the intercooling first interface 503 is an air inlet of the intercooling device 500, the intercooling first interface 503 is connected with a first supercharging air inlet pipe 701, the intercooling second interface 504 is an air outlet of the intercooling device 500, the intercooling second interface 504 is connected with a second supercharging air inlet pipe 702, the caliber of an intercooling air inlet connecting section on the top of the intercooling heat exchange chamber body 501 is gradually reduced from the intercooling first interface 503 inwards, and the caliber of an intercooling air outlet connecting, thereby making the air intake and air outtake smoother.

The heat radiation water tank 1400 comprises a core 1401, a heat radiation water tank top shell 1402, a heat radiation water tank bottom shell 1403, a heat radiation water tank left side plate 1404 and a heat radiation water tank right side plate 1405 are respectively connected to the upper side, the lower side, the left side and the right side of the core 1401, the heat radiation water tank left side plate 1404 and the heat radiation water tank right side plate 1405 are respectively tightly attached to the left side and the right side of the core 1401, the heat radiation water tank top shell 1402 is covered on the top of the core 1401, the heat radiation water tank top shell 1402 is in a hollow state, an upper sealing gasket 1406 is further arranged between the bottom of the heat radiation water tank top shell 1402 and the top of the core 1401, two compound water feeding port covers 1407 are arranged on the top of the heat radiation water tank top shell 1402, one side of the heat radiation water tank top shell 1402 is connected with a first water return end and a second water return end, the heat radiation water tank bottom shell 1403 is erected, a side of heat dissipation water tank drain pan 1403 is provided with two switches 1409 that drain, and the opposite side of heat dissipation water tank drain pan 1403 is connected with first water outlet end and second water outlet end, first section of the lateral surface of heat dissipation water tank left side board 1404 and heat dissipation water tank right side board 1405 all is provided with handle 1410, first section of the lateral surface of heat dissipation water tank left side board 1404 and heat dissipation water tank right side board 1405 all is provided with heat dissipation water tank support base 1411, and the junction between heat dissipation water tank support base 1411 and heat dissipation water tank left side board 1404 and heat dissipation water tank right side board 1405 is provided with the strengthening rib. And a wind scooper 1412 is arranged on one side of the heat dissipation water tank close to the explosion-proof diesel engine main body 100, and four sides of the wind scooper 1412 are respectively connected with the edges of a heat dissipation water tank top shell 1402, a heat dissipation water tank bottom shell 1403, a heat dissipation water tank left side plate 1404 and a heat dissipation water tank right side plate 1405.

The tail gas treatment box 600 comprises a tail gas treatment box body 601, the right section in the tail gas treatment box body 601 is an air inlet section, the left section in the tail gas treatment box body 601 is an air outlet section, the air inlet section and the air outlet section are separated by a partition plate 602, the front end and the rear end of the partition plate 602 are respectively connected with the front inner side wall and the rear inner side wall of the tail gas treatment box body 601, the upper end and the lower end of the partition plate 602 are respectively separated from the upper inner side wall and the lower inner side wall of the tail gas treatment box body 601 by a distance, the right section of the top plate of the tail gas treatment box body 601 is provided with an air inlet flange 603, the air inlet flange 603 is connected with a tail gas inlet pipe 604 to the tail gas treatment box body 601, the lower end of the tail gas inlet pipe 604 is separated from the bottom of the tail gas treatment box body 601 by a distance, the periphery of the middle-lower section of the tail gas inlet pipe 604, the tail gas cover plate 606 is away from the first waste gas pipe 605 by a certain distance, the periphery of the tail gas cover plate 606 is connected with a second waste gas pipe 607 downwards, the pipe diameter of the second waste gas pipe 607 is larger than that of the first waste gas pipe 605, the height of the lower opening of the second waste gas pipe 607 is lower than that of the upper opening of the first waste gas pipe 605, a third waste gas pipe 608 is surrounded at the periphery of the lower end of the tail gas inlet pipe 604, the bottom of the third waste gas pipe 608 is contacted with the bottom of the tail gas treatment box 601, the pipe diameter of the third waste gas pipe 608 is smaller than that of the first waste gas pipe 605, a flow equalizing gas guide mechanism 609 is arranged at the outlet of the lower end of the tail gas inlet pipe 604, the flow equalizing gas guide mechanism 609 is composed of a plurality of flow equalizing gas guide pieces with the same structure, preferably four flow equalizing gas guide pieces, each flow equalizing gas guide piece comprises an upper rectangular piece structure and a lower arc piece, the arc-shaped sheet structure of the plurality of flow-equalizing air guide sheets is bent clockwise from the overlooking angle, the outer edge of the arc-shaped sheet structure is tangent to the outer edge of the rectangular sheet structure, an arc-shaped notch is formed in the inner edge of the arc-shaped sheet structure, the lower end of the flow-equalizing air guide mechanism 609 extends below the lower opening of the tail gas inlet pipe 604, and the outer edge of the rectangular sheet structure of the flow-equalizing air guide sheet of the flow-equalizing air guide mechanism 609 is connected with the interior of the tail gas inlet; a third exhaust pipe notch 608.1 with an upward concave rectangular structure is uniformly arranged at the lower opening of the third exhaust pipe 608, the lower opening of the first exhaust gas pipe 605 is uniformly provided with a first exhaust gas pipe notch 605.1 which is concavely arranged upwards and has a rectangular structure, the third exhaust gas pipe notch 608.1 and the first exhaust gas pipe notch 605.1 are arranged in a staggered manner, the height of the third exhaust gas pipe notch 608.1 is smaller than that of the first exhaust gas pipe notch 605.1, preferably four third exhaust gas pipe notches 608.1 and four first exhaust gas pipe notches 605.1 are provided, a circular baffle plate 610 is arranged inside the third exhaust pipe 608, the height of the circular baffle plate 610 is consistent with the top height of the third exhaust pipe notch 608.1, a plurality of vent holes 610.1 which are vertically communicated are arranged on the circular baffle plate 610, preferably four vent holes 610.1, the positions of the vent holes 610.1 correspond to the position of the first exhaust pipe notch 605.1, namely the positions of the vent holes 610.1 are staggered with the position of the third exhaust pipe notch 608.1;

a fence seat 611 is arranged on the left section of the top plate of the tail gas treatment box 601, the fence seat 611 is of a rectangular frame structure, two vertically arranged fence pressing mechanisms 612 are respectively arranged on the left side frame and the right side frame of the fence seat 611, an anti-explosion fence 613 is upwards arranged on the inner edge of the rectangular frame structure of the fence seat 611, two left limiting columns and right limiting columns 614 are arranged on the front frame of the fence seat 611, the limiting columns 614 are used for front side positioning when the anti-explosion fence 613 is installed, a pressing plate 615 of the rectangular frame structure is connected between the two fence pressing mechanisms 612, the pressing plate 615 is used for pressing the anti-explosion fence 613, the fence pressing mechanism 612 comprises a hinged column 612.1 at the front end and a threaded column 612.2 at the rear end, the top ends of the hinged column 612.1 and the threaded column 38925 are directly connected with a pressing strip 385932, the front end of the pressing strip 2 is connected to the top of the hinged column 612.1 through a pin 612., an opening at the rear end of the pressing bar 612.3 is sleeved outside the top thread of the threaded column 612.2 and is locked by a nut 612.5, guide plates 612.6 which are longitudinally arranged are further arranged on the left and right frames of the fence seat 611, a front guide column 612.7 and a rear guide column 612.7 are upwards arranged on the guide plates 612.6, a compression spring 612.8 is sleeved on the guide columns 612.7, the rear end of the guide plate 612.6 is sleeved outside the bottom end of the threaded column 612.2, positioning holes of the left and right frames of the pressing plate 615 are respectively sleeved on the guide columns 612.7 of the left and right fence pressing mechanisms 612, the pressing plate 615 is positioned above the compression spring 612.8, a strip-shaped hollow which is through in the up-down direction is arranged in the middle of the pressing bar 612.3, a strip-shaped pressing block 612.9 is arranged in the strip-shaped pressing block 612.9, the middle of the strip-shaped pressing block 612.9 is connected with the middle of the pressing bar 612.3 through a transverse pressing block pin 612.10, the middle of the strip-shaped pressing block 612.9 is, so that the force is uniformly applied, a fence upper cover plate 616 is arranged above the anti-explosion fence 613, the fence upper cover plate 616 is connected with a temperature sensor 626, and the fence upper cover plate 616 is connected with an exhaust gas pipe 626 facing to the front lower part.

Be provided with back shroud 617 on the posterior lateral plate of tail gas treatment box 601, be provided with floater 618 in the section of giving vent to anger of tail gas treatment box 601, the lower extreme of floater 618 is connected with floater screw rod 620 through floater connecting pin 619, the one end threaded connection moisturizing connecting rod 621 of floater screw rod 620, moisturizing connecting rod 621 connects moisturizing valve body 622, moisturizing valve body 622 passes through moisturizing seat 623 and connects on the left side wall of tail gas treatment box 601, moisturizing connector 627 is connected to the outer end of moisturizing valve body 622, the left side wall lower extreme of tail gas treatment box 601 is provided with drain 624, be provided with piece formula ball valve 625 on the drain 624.

The air inlet and air door assembly 900 comprises an air door pipeline 901, an air inlet and an air outlet of the air door pipeline 901 are respectively provided with an air inlet connecting flange 902 and an air outlet connecting flange 903, the top of the outer side of the air door pipeline 901 is vertically connected with an air door supporting seat 904 in the horizontal direction, an air door cylinder 905 is arranged above the air door supporting seat 904, a round air door 906 matched with the inner wall of the air door pipeline 901 is arranged in the air door pipeline 901, the air door 906 is upwards connected with an air door rotating rod 907, the air door rotating rod 907 upwards extends out of the air door pipeline 901 and the air door supporting seat 904, the telescopic end of the air door cylinder 905 is connected with the upper end of the air door rotating rod 907 through a swing rod 908, and the air door 906.

A control method of a high-pressure common-rail explosion-proof diesel engine system comprises the following steps:

the high-pressure common rail explosion-proof diesel engine system is provided with a rotating speed sensor, a rail pressure sensor, an air inlet pressure temperature sensor, a cooling liquid temperature sensor and the like, wherein the rotating speed sensor is a crankshaft sensor and is arranged on a flywheel shell, the rotating speed sensor measures the rotating speed of the engine, the rail pressure sensor measures the rail pressure of the high-pressure common rail, the air inlet pressure temperature sensor measures the air inlet pressure and the air inlet temperature, the cooling liquid temperature sensor measures the cooling liquid temperature,

real-time data are transmitted to the ECU through the measurement of the parameters, the ECU calls the tables, and the control system calculates and then controls the opening and closing and the opening of each valve.

Selection of rail pressure referring to Table 1 in FIG. 19 of the specification:

the rail pressure of the real-time high-pressure common rail is controlled through the real-time rotating speed and the oil quantity in the table 1; be provided with rail pressure sensor on the common rail pipeline, rail pressure carries out real-time detection through rail pressure sensor and obtains real-time rail pressure value, obtains the theoretical rail pressure value of rail pressure through the rotational speed data of cam and bent axle, and real-time rail pressure value and theoretical rail pressure value carry out the comparison if there is the difference, then feed back to the high-pressure oil pump, thereby realize through the regulation of high-pressure oil pump that the regulation of real-time rail pressure value makes it tend to theoretical rail pressure value size.

Calculating a real-time injection angle of an oil nozzle of a high-pressure common rail system of the high-pressure common rail explosion-proof diesel engine system at a corresponding moment in real time according to the real-time parameters; the control of the real-time injection angle is controlled by an electromagnetic valve inside the oil injector.

Wherein: real-time spray angle = basic spray angle + water temperature correction spray angle water temperature correction coefficient

Selection of base spray angle referring to table 2 in fig. 20:

selection of water temperature correction injection angle referring to table 3 of fig. 21:

the water temperature correction factor is selected as follows:

the water temperature correction coefficient is 1.5 at minus 30 ℃, 1.25 at minus 20 ℃, 1 at minus 10 ℃, 0 at 0 ℃ and 0 at over 0 ℃, the linear change is a first linear change from minus 30 ℃ to minus 10 ℃, and the linear change is a second linear change from minus 10 ℃ to 0 ℃.

The above is only a specific application example of the present invention, and does not constitute any limitation to the protection scope of the present invention. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.

Claims (9)

1. An air circulation system of a high-pressure common-rail explosion-proof diesel engine is characterized by comprising an air inlet system (700), an air outlet system (800) and an air passage of an explosion-proof diesel engine main body (100) positioned between the air inlet system and the air outlet system;

the air inlet system (700) sequentially comprises an air filter (300), an explosion-proof supercharger (400), an inter-cooling device (500), an air inlet air door assembly (900) and an air inlet flame arrester (1000) to an explosion-proof air inlet manifold (101) from front to back, wherein an air outlet of the air filter (300) is connected with an air inlet of the explosion-proof supercharger (400), a pressure boost air outlet of the explosion-proof supercharger (400) is connected with an air inlet of the inter-cooling device (500) through a first pressure boost air inlet pipe (701), an air outlet of the inter-cooling device (500) is connected with an air inlet of the air inlet air door assembly (900) through a second pressure boost air inlet pipe (702), an air outlet of the air inlet air door assembly (900) is connected with an air inlet of the air inlet flame arrester (1000), and an air outlet of the air inlet flame arrester;

the exhaust system (800) comprises an explosion-proof exhaust manifold (102), an explosion-proof supercharger (400) and a tail gas treatment box (600) from front to back in sequence, an exhaust port of the explosion-proof exhaust manifold (102) is connected with a return air port of the explosion-proof supercharger (400), and an exhaust port of the explosion-proof supercharger (400) is connected with an air inlet of the tail gas treatment box (600) through an exhaust corrugated pipe (1200).

2. The air circulation system of the high-pressure common-rail explosion-proof diesel engine according to claim 1, characterized in that the air intake damper assembly (900) comprises a damper pipe (901), an air intake connecting flange (902) and an air outlet connecting flange (903) are respectively arranged at an air intake and an air outlet of the damper pipe (901), an damper support seat (904) is vertically connected to the top of the outer side of the damper pipe (901) in the horizontal direction, a damper cylinder (905) is arranged above the damper support seat (904), and a circular damper (906) matched with the inner wall of the damper pipe (901) is arranged in the damper pipe (901).

3. The air circulation system of the high-pressure common-rail explosion-proof diesel engine as claimed in claim 2, wherein the air door (906) is connected with an air door rotating rod (907) upwards, the air door rotating rod (907) extends upwards out of the air door pipeline (901) and the air door supporting seat (904), and the telescopic end of the air door cylinder (905) is connected with the upper end of the air door rotating rod (907) through a swing rod (908).

4. The air circulation system of the high-pressure common-rail explosion-proof diesel engine according to claim 1, wherein the exhaust gas treatment tank (600) comprises an exhaust gas treatment tank body (601), the right section in the exhaust gas treatment tank body (601) is an air inlet section, the left section in the exhaust gas treatment tank body (601) is an air outlet section, the air inlet section and the air outlet section are separated by a partition plate (602), the front end and the rear end of the partition plate (602) are respectively connected with the front inner side wall and the rear inner side wall of the exhaust gas treatment tank body (601), and the upper end and the lower end of the partition plate (602) are respectively separated from the upper inner side wall and the lower inner side wall of the exhaust gas treatment.

5. The air circulation system of the high-pressure common-rail explosion-proof diesel engine according to claim 4, characterized in that the right section of the top plate of the tail gas treatment tank (601) is provided with an air inlet flange (603), the air inlet flange (603) is connected with a tail gas inlet pipe (604) to the tail gas treatment tank (601), the lower end of the tail gas inlet pipe (604) is away from the bottom of the tail gas treatment tank (601) by a certain distance, the periphery of the middle-lower section of the tail gas inlet pipe (604) is surrounded by a first exhaust pipe (605), the bottom of the first exhaust pipe (605) is in contact with the bottom of the tail gas treatment tank (601), the tail gas inlet pipe (604) above the first exhaust pipe (605) is provided with a tail gas cover plate (606), the tail gas cover plate (606) is away from the first exhaust pipe (605) by a certain distance, the periphery of the tail gas cover plate (, the pipe diameter of the second exhaust gas pipe (607) is larger than that of the first exhaust gas pipe (605), the height of the lower opening of the second exhaust gas pipe (607) is lower than that of the upper opening of the first exhaust gas pipe (605), a third exhaust gas pipe (608) is arranged around the periphery of the lower end of the exhaust gas inlet pipe (604), the bottom of the third exhaust gas pipe (608) is in contact with the bottom of the exhaust gas treatment box body (601), and the pipe diameter of the third exhaust gas pipe (608) is smaller than that of the first exhaust gas pipe (605).

6. The air circulation system of the high-pressure common-rail explosion-proof diesel engine according to claim 5, characterized in that a flow equalizing air guide mechanism (609) is arranged at the air outlet at the lower end of the tail gas inlet pipe (604), and the flow equalizing air guide mechanism (609) is composed of a plurality of flow equalizing air guide plates with the same structure.

7. The air circulation system of the high-pressure common-rail explosion-proof diesel engine according to claim 6, characterized in that the flow equalizing air guide piece comprises an upper rectangular piece structure and a lower arc piece structure, the upper rectangular piece structure and the lower arc piece structure are welded in a center diverging manner, the lower arc piece structure of the flow equalizing air guide piece is clockwise bent from a top view angle, the outer edge of the arc piece structure is tangent to the outer edge of the rectangular piece structure, the inner edge of the arc piece structure is provided with an arc notch, the lower end of the flow equalizing air guide mechanism (609) extends below the lower opening of the tail gas inlet pipe (604), and the outer edge of the rectangular piece structure of the flow equalizing air guide piece of the flow equalizing air guide mechanism (609) is internally connected with the tail gas inlet pipe (604).

8. The air circulation system of the high-pressure common-rail explosion-proof diesel engine according to claim 5, characterized in that the lower opening of the third waste gas pipe (608) is uniformly provided with third waste gas pipe notches (608.1) of a rectangular structure which are arranged in an upward concave manner, the lower opening of the first waste gas pipe (605) is uniformly provided with a first waste gas pipe notch (605.1) which is of an upward concave rectangular structure, the third waste gas pipe notch (608.1) and the first waste gas pipe notch (605.1) are arranged in a staggered manner, the height of the third waste gas pipe notch (608.1) is smaller than that of the first waste gas pipe notch (605.1), preferably four third waste gas pipe notches (608.1) and four first waste gas pipe notches (605.1), a circular baffle (610) is arranged in the third exhaust pipe (608), the height of the circular baffle (610) is consistent with the height of the top of the third exhaust pipe notch (608.1).

9. The air circulation system of the high-pressure common-rail explosion-proof diesel engine as claimed in claim 8, wherein the circular baffle (610) is provided with a plurality of vent holes (610.1) which are vertically communicated, and the positions of the vent holes (610.1) correspond to the positions of the first exhaust pipe notches (605.1), i.e. the positions of the vent holes (610.1) are staggered from the position of the third exhaust pipe notch (608.1).

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