CN116181532A - A method and device with functions of air pressurization and flow stabilization - Google Patents

Abstract

The invention relates to the technical field of diesel engines, and discloses a method and device with functions of air boosting and flow stabilization. The size of the first flange and the second flange are the same, and the distance between the first flange and the second flange is The air guide sleeve is connected through the bellows, and the air guide sleeve extends through the second flange and the bellows to the position of the flange opening of the first flange, and the air guide sleeve and the first flange are fixedly connected by welding. In the present invention, two sets of flanges are used as the connecting parts between the supercharger and the intercooler front joint, and under the telescopic guidance of the bellows, the air guide sleeve inserted into the intercooler front joint can maintain a certain margin of deformation and displacement. Then, under the pressurization and steady flow of the high-pressure gas by the air guide sleeve in the form of flared horn, it can not only play the role of compensation for the connection of parts, but also play the role of air pressurization, increase the intake pressure of the diesel engine, and Reduce energy loss caused by turbulent air flow and improve supercharger efficiency.

Description

A method and device with functions of air pressurization and flow stabilization

technical field

The invention relates to the technical field of diesel engines, in particular to a method and a device with the functions of air boosting and flow stabilization.

Background technique

In order to compensate for the clearance problem of various components during the assembly process, the current diesel engine uses the structural design of the installation of expansion joints. The structure of the existing expansion joints is shown in Figure 1 of the manual. The connection between the expansion joint and the air cooler The location is a large cavity, as shown in Figure 2 of the specification, using the existing expansion joint connection, the expansion energy can play the role of connection and gap compensation.

However, the existing technology of using expansion joints to connect can only play the role of connecting the parts of the diesel engine, and for the position used in the present invention, if it is only connected, the air after the pressurization will suddenly enter the large space. The cavity will cause air flow disorder, cause energy loss, and reduce the efficiency of the supercharger. Therefore, those skilled in the art provide a method and device with air boosting and flow stabilizing functions to solve the problems raised in the background art above.

Contents of the invention

The object of the present invention is to provide a method and device with air boosting and flow stabilizing functions, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above object, the present invention provides the following technical solutions: a method with air pressurization and flow stabilization functions, comprising the following steps:

S1. Production and processing:

The production and processing of the first flange and the second flange adopts the rolling flange processing technology, and the first flange and the second flange are rolled and formed, and the rings of the first flange and the second flange The size and the number of bolt holes match the high-pressure nozzles of the supercharger and the intercooler front connection respectively;

The production and processing of the corrugated pipe adopts the form of an extruder, and the extruded hose is formed by a corrugator, cooled by water to form a corrugated pipe, and the pipe diameter of the corrugated pipe is the same as the ring of the first flange and the second flange. The diameters match and correspond;

The production and processing of the air guide sleeve adopts the roller rolling method to carry out rolling processing on the shape of the bell mouth of the air guide sleeve, and then according to the size of the bell mouth, select a suitable pipe and cut it to a specified length, and use the flared inner support In this way, one end of the pipe is expanded into a wide-mouth flaring that matches the first flange, and then, by welding, the bell mouth and the pipe mouth are welded and fixed to form an air guide sleeve;

S2. Assembly and processing:

Firstly, the corrugated pipe is screwed and fixed between the first flange and the second flange by means of bolt connection, and the bellows is placed on the air guide sleeve;

Secondly, by welding, the flared end of the air guide sleeve is welded on the first flange, and the other end of the air guide sleeve can move freely, so that the overall structure of the device can freely expand and contract by 3mm in the length direction and move 2mm in the circumferential direction Left and right, it plays the role of compensating the positional deviation of connecting two parts due to installation or part processing;

S3, installation and use:

Connect the first flange and the second flange to the supercharger and the intercooler front connection respectively by means of bolt connection, and at the same time of installation and connection, extend the bell mouth of the air guide sleeve to the intercooler front connection Inside the cavity, when the air passes through, there will be a "Bernoulli effect", the flow rate of the airflow will decrease, and the pressure will increase, which will play the role of air boosting and steady flow buffering.

As a further solution of the present invention: the Bernoulli equation is:

p+1/2ρv ² +ρgh＝C

In the formula, p is the pressure in the air guide pipe, v is the flow velocity in the air guide pipe, ρ is the fluid density, g is the acceleration of gravity, h is the height of the point, and C is a constant.

As a further solution of the present invention: the first flange and the second flange need to be subjected to a shot peening process after being rolled and formed, and the shot peening equipment uses a high-pressure fan or compressed air as power, and the shot peening adopts a 40-50HRC Cast steel shot, and the shot peening particle size is 0.8~1.2mm.

As a further solution of the present invention: the crests and troughs of the bellows correspond to the stress concentration of the pipe, wherein the maximum equivalent stress position of the bellows pipe diameter is closely related to the load, and the maximum equivalent stress increases with the bellows tube The diameter increases, and the maximum equivalent stress decreases logarithmically with the increase of the bellows wall thickness.

As a further solution of the present invention: the bell mouth of the air guide sleeve is formed by rolling with a three-roller hydraulic conical plate rolling machine.

A device with air boosting and flow stabilization functions, which is used to improve the air boosting and flow stabilization functions of a diesel engine, including a first flange, a bellows, a second flange, and an air guide sleeve, wherein,

The size of the first flange and the second flange are the same, and the first flange and the second flange are connected by a bellows;

The air guiding sleeve extends through the second flange and the bellows to the position of the flange opening of the first flange in sequence, and the air guiding sleeve and the first flange are fixedly connected by welding.

As a further solution of the present invention: the first flange, the second flange, and the air guide sleeve are all made of stainless steel components, and the surfaces of the first flange, the second flange, and the air guide sleeve are all coated with anti-corrosion Paint, the bellows are made of PA or PP material.

Compared with prior art, the beneficial effect of the present invention is:

In the present invention, two sets of flanges are used as the connecting parts between the supercharger and the intercooler front joint, and under the telescopic guidance of the bellows, the air guide sleeve inserted into the intercooler front joint can maintain a certain margin of deformation and displacement. Then, under the pressurization and steady flow of the high-pressure gas by the air guide sleeve in the form of flared horn, it can not only play the role of compensation for the connection of parts, but also play the role of air pressurization, increase the intake pressure of the diesel engine, and Reduce energy loss caused by turbulent air flow and improve supercharger efficiency.

Description of drawings

Fig. 1 is a kind of existing structural representation of the device with air pressurization and steady flow function;

Fig. 2 is a kind of existing installation schematic diagram of the device with air pressurization and steady flow function;

Fig. 3 is a kind of structural representation of the device with air pressurization and steady flow function;

Fig. 4 is a schematic diagram of installation of a device with air pressurization and flow stabilization functions.

In the figure: 1, the first flange; 2, the bellows; 3, the second flange; 4, the air guide sleeve.

Detailed ways

Please refer to Fig. 3-4, in the embodiment of the present invention, a kind of method with air pressurization and steady flow function, comprises the following steps:

S1. Production and processing:

The production and processing of the first flange 1 and the second flange 3 adopts the rolling flange processing technology, and the first flange 1 and the second flange 3 are rolled and formed, and the first flange 1 and the second flange The size of the ring and the number of bolt holes of the flange 3 match the high-pressure nozzles of the supercharger and the intercooler front connection respectively;

The production and processing of the corrugated pipe 2 adopts the form of an extruder, and the extruded hose is formed by a corrugator, cooled by water to form the corrugated pipe 2, and the pipe diameter of the corrugated pipe 2 is the same as that of the first flange 1 and the second method. The ring diameters of Lan 3 match and correspond to each other;

The production and processing of the air guide sleeve 4 adopts roller rolling to process the shape of the bell mouth of the air guide sleeve 4. Then, according to the size of the bell mouth, a suitable pipe is selected and cut to a specified length. In the way of bracing, one end of the pipe is expanded into a wide-mouth flare that matches the first flange 1, and then, by welding, the bell mouth and the pipe mouth are welded and fixed to form the air guide sleeve 4;

S2. Assembly and processing:

First, the bellows 2 is screwed and fixed between the first flange 1 and the second flange 3 by means of bolt connection, and the bellows 2 is placed on the air guide sleeve 4;

Secondly, by welding, the flaring end of the air guide sleeve 4 is welded on the first flange 1, and the other end of the air guide sleeve 4 can move freely, so that the overall structure of the device can be freely expanded and contracted by 3 mm in the length direction, and the circumference The direction moves about 2mm to compensate for the position deviation caused by the installation or part processing of the two parts connected;

S3, installation and use:

The first flange 1 and the second flange 3 are respectively connected to the supercharger and the intercooler front connecting pipe by means of bolt connection. Inside the cavity of the cold front connection, when the air passes through, there will be a "Bernoulli effect", the flow rate of the airflow will decrease, and the pressure will increase, which will play the role of air boosting and steady flow buffering.

The Bernoulli equation is:

p+1/2ρv ² +ρgh＝C

In the formula, p is the pressure in the duct of the air guide sleeve 4, v is the flow velocity in the duct of the air guide sleeve 4, ρ is the fluid density, g is the acceleration of gravity, h is the height of the point, and C is a constant.

The first flange 1 and the second flange 3 need to be shot peened after being rolled and formed. The shot peening equipment uses high-pressure fans or compressed air as power. The particle size is 0.8～1.2mm. After the shot peening, the first flange 1 and the second flange 3 still need to be cleaned. Scale, scale, paint, oxides, corrosion and other foreign matter (except for blemishes), and blemishes are limited to not more than 5% of the surface per square meter, which may include: slight shadows, small amounts due to blemishes, rust Discoloration, mill scale and paint blemishes.

The peaks and troughs of the bellows 2 correspond to the stress concentration of the pipe, where the position of the maximum equivalent stress of the diameter of the bellows 2 is closely related to the load, and the maximum equivalent stress increases with the increase of the diameter of the bellows 2, And the large equivalent stress decreases logarithmically with the increase of the wall thickness of the bellows 2. After the bellows 2 is processed and formed, a vulcanization process is still required. The vulcanization method adopts a liquid medium continuous vulcanization method, and the vulcanization medium is a molten alloy (tin 40-45%, bismuth 55-60%), melting point 150°C, or molten salt (50-53% potassium nitrate, 40-43% sodium nitrite, 7-10% ammonium nitrate), melting point 142°C, boiling point 500 ℃, when performing vulcanization work, first heat the vulcanization medium to 180-250 ℃, and then carry out continuous vulcanization work on the semi-finished product (the time depends on the vulcanization conditions of the rubber).

The bell mouth of the air guide sleeve 4 is rolled and pressed by a three-roller hydraulic conical plate rolling machine. The structure of the three-roller hydraulic conical plate rolling machine is a three-roller symmetrical type, and the upper plate roll is symmetrical in the center of the two lower spokes. The hydraulic oil in the hydraulic cylinder acts on the piston for vertical lifting movement, and then drives the two lower rolling gears to mesh and rotate through the driving mechanism to provide torque for the rolled plate, and then the flat plastic metal plate passes through the three rolls of the plate rolling machine. Between the working rollers (two lower wheels and one upper wheel), with the help of the downward pressure of the upper roller and the rotation of the lower wheel, the metal plate is continuously bent through multiple passes, resulting in permanent plastic deformation, and rolled into a wind guide The bell mouth shape required for set 4.

Please refer to Fig. 3-4, in the embodiment of the present invention, a kind of device with air pressurization and steady flow function, it is used for improving the air pressurization and steady flow function of diesel engine, comprises first flange 1, bellows 2 , the second flange 3, the air guide sleeve 4, wherein the first flange 1 and the second flange 3 have the same size, and the first flange 1 and the second flange 3 are connected by a bellows 2, and the guide The air sleeve 4 runs through the second flange 3 and the bellows 2 in turn and extends to the flange opening of the first flange 1, and the air guide sleeve 4 and the first flange 1 are fixedly connected by welding. When using this device When installing diesel engine components, connect the first flange 1 and the second flange 3 to the supercharger and the intercooler front connection respectively, and use the telescopic steering of the bellows 2 to make the air guide sleeve 4 in the length direction Free expansion and contraction of 3mm, circumferential movement of about 2mm, play a role in compensating the position deviation caused by the connection between the supercharger and the intercooler front connection due to installation or part processing. When the pressure increases, the "Bernoulli effect" will appear, the flow velocity of the airflow will decrease, and the pressure will increase, which will play the role of air boosting, and can make the airflow of the boosted air more stable, reduce the work loss of the boosted air, and increase the boost. compressor efficiency.

The first flange 1, the second flange 3, and the air guide sleeve 4 are all made of stainless steel, and the surfaces of the first flange 1, the second flange 3, and the air guide sleeve 4 are all coated with anti-corrosion paint. 2. PA or PP material components are used. During the installation and use of this device, the stainless steel flange and air duct sleeve have good corrosion resistance, high strength, and low cost performance. They have a long service life and are more popular and usable. , and the bellows 2 in the form of PA or PP rubber has good telescopic steering performance, anti-aging, high temperature resistance, and corrosion resistance, and can adapt to workplaces in different environments.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto, any person familiar with the technical field within the technical scope disclosed in the present invention, according to the technology of the present invention Any equivalent replacement or change of the scheme and its inventive concepts shall fall within the protection scope of the present invention.

Claims (7)

1. A method with air pressurization and steady flow function, is characterized in that, comprises the steps: S1. Production and processing: The production and processing of the first flange (1) and the second flange (3) adopts a rolling flange processing technology, and the first flange (1) and the second flange (3) are rolled and formed, and The size of the rings and the number of bolt holes of the first flange (1) and the second flange (3) respectively match and correspond to the high-pressure nozzles of the supercharger and the intercooler front connection; The production and processing of the corrugated pipe (2) adopts the form of an extruder, and the extruded hose is formed by a corrugator, water-cooled and cooled to form the corrugated pipe (2), and the pipe diameter of the corrugated pipe (2) is the same as that of the first method. The ring diameters of the flange (1) and the second flange (3) match and correspond; The production and processing of the air guide sleeve (4) adopts roller rolling to roll and press the shape of the bell mouth of the air guide sleeve (4), and then according to the size of the bell mouth, select a suitable pipe and cut it to a specified length , expand one end of the pipe into a wide-mouth flare that matches the first flange (1) by means of a flared inner support, and then, use welding to weld and fix the bell mouth and the pipe mouth to form an air guide sleeve ( 4); S2. Assembly and processing: First, screw the bellows (2) between the first flange (1) and the second flange (3) by bolt connection, and put the bellows (2) on the air guide sleeve (4) superior; Secondly, by welding, the flaring end of the air guide sleeve (4) is welded on the first flange (1), and the other end of the air guide sleeve (4) can move freely, so that the overall structure of the device is in the longitudinal direction. It can freely expand and contract by 3mm, and move about 2mm in the circumferential direction, which can compensate for the position deviation caused by the installation or part processing of the two parts connected; S3, installation and use: Connect the first flange (1) and the second flange (3) to the supercharger and the intercooler front connecting pipe respectively by means of bolt connection, and at the same time of installation and connection, make the horn The mouth extends into the cavity before the intercooler. When the air passes through, the "Bernoulli effect" will appear, the flow rate of the airflow will decrease, and the pressure will increase, which will play the role of air boosting and steady flow buffering. 2. a kind of method with air pressurization and steady flow function according to claim 1, is characterized in that, described Bernoulli equation is: p+1/2ρv ² +ρgh＝C In the formula, p is the pressure in the duct of the air guide sleeve (4), v is the flow velocity in the duct of the air guide sleeve (4), ρ is the fluid density, g is the acceleration of gravity, h is the height of the point, and C is a constant . 3. A kind of method with air pressurization and steady flow function according to claim 1, it is characterized in that, described first flange (1) and second flange (3) need The shot peening process is carried out. The shot peening equipment uses high-pressure fans or compressed air as power. The shot peening adopts cast steel shot of 40-50HRC, and the particle size of the shot peening is 0.8-1.2mm. 4. A kind of method with air pressurization and steady flow function according to claim 1, is characterized in that, the stress concentration place of its pipeline corresponding to the crest and trough of described bellows (2), wherein, bellows ( 2) The location of the maximum equivalent stress of the pipe diameter is closely related to the load. The maximum equivalent stress increases with the increase of the diameter of the bellows (2), and the maximum equivalent stress increases with the increase of the wall thickness of the bellows (2). Logarithmic decline. 5. A kind of method with air pressurization and steady flow function according to claim 1, it is characterized in that, the bell mouth of described wind guide sleeve (4) adopts three-roller type hydraulic conical plate rolling machine to roll and press become. 6. A kind of device with air boosting and flow stabilization function according to any one of claims 1 to 5, characterized in that, it is used to improve the air boosting and flow stabilization function of diesel engine, including the first flange ( 1), bellows (2), second flange (3), air guide sleeve (4), wherein, The first flange (1) and the second flange (3) have the same size, and the first flange (1) and the second flange (3) are connected by a bellows (2); The air guide sleeve (4) extends through the second flange (3) and the bellows (2) to the position of the flange opening of the first flange (1) in sequence, and the air guide sleeve (4) and the first flange The flanges (1) are fixedly connected by welding. 7. A device with air pressurization and flow stabilization functions according to claim 6, characterized in that the first flange (1), the second flange (3), the air guide sleeve (4) They are all made of stainless steel, and the surfaces of the first flange (1), the second flange (3), and the air guide sleeve (4) are all coated with anti-corrosion paint, and the bellows (2) are made of PA or PP member.

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