CN210509370U

CN210509370U - Supercharger for low-speed large-torque diesel engine

Info

Publication number: CN210509370U
Application number: CN201921394057.9U
Authority: CN
Inventors: 侯宝军; 黄国鹏; 李兵; 张会武; 沈振飞; 陆洋; 王小妮; 安哲; 宫立
Original assignee: Shaanxi North Dynamic Co ltd
Current assignee: Shaanxi North Dynamic Co ltd
Priority date: 2019-08-26
Filing date: 2019-08-26
Publication date: 2020-05-12
Anticipated expiration: 2029-08-26

Abstract

The utility model provides a big moment of torsion booster for diesel engine of low-speed, including compressor, bearing body, turbine case, the bearing body is located between compressor and the turbine case, and the turbine case is equipped with the second gas outlet, still includes cylinder, executor and closing cap part, and the cylinder is connected with the executor, and the executor is connected with the closing cap part, and the cylinder is connected with the compressor, and the compressor drives actuating cylinder and drives the executor motion, and the executor drives the closing cap part motion to the realization is to the shutoff of second gas outlet or open. Through the scheme, the utility model discloses create the structure that provides, when the high-speed regional boost pressure of booster is too high, through opening cylinder bypass part exhaust energy, make the high-speed regional boost pressure of booster keep in the certain limit, unlikely appearing increasing boost pressure along with the altitude and lasting rising, lead to the problem that the booster is overspeed.

Description

Supercharger for low-speed large-torque diesel engine

Technical Field

The utility model relates to a booster field especially relates to a big moment of torsion of low-speed booster for diesel engine.

Background

With the rapid development of the automobile and engine industry, the application range of the diesel engine is continuously expanded, and the torque demand of the diesel engine at low rotating speed is higher and higher. The boost pressure of booster under low rotational speed will directly influence the torque value of diesel engine, and boost pressure when promoting the low-speed makes the torque reserve of diesel engine sufficient and use rotational speed wide range, can satisfy the required moment of torsion of vehicle when low-speed climbing, improves vehicle economy and to the adaptability of altitude variation.

In order to meet the use requirements, a supercharger for a low-speed large-torque diesel engine is provided.

Disclosure of Invention

An object of the utility model is to provide a low-speed big moment of torsion booster for diesel engine through addding the bypass valve structure to the realization satisfies the torque reserve that the diesel engine needs under the low-speed sufficient and the wider characteristic of big torque range, makes the vehicle have stronger power when the low-speed climbing.

The utility model discloses a technique be:

the supercharger for the low-speed large-torque diesel engine comprises a gas compressor, a bearing body and a turbine box, wherein the bearing body is arranged between the gas compressor and the turbine box, the turbine box is provided with a second gas outlet, the supercharger further comprises a cylinder, an actuator and a sealing cover component, the cylinder is connected with the actuator, the actuator is connected with the sealing cover component, the cylinder is connected with the gas compressor, the gas compressor drives the cylinder to drive the actuator to move, and the actuator drives the sealing cover component to move so as to realize plugging or opening of the second gas outlet.

Through the scheme, the structure provided by the invention has the advantages that when the boost pressure in the high-speed area of the supercharger is too high, the boost pressure in the high-speed area of the supercharger is kept in a certain range by opening the energy of the exhaust gas of the bypass part of the cylinder, so that the problem of overspeed of the supercharger caused by continuous rise of the boost pressure along with the increase of the altitude is avoided.

According to the scheme, the actuator comprises a push rod, a rocker arm, an overturning part and a fixing part, the push rod is connected with the cylinder, the push rod is connected with the rocker arm, the rocker arm is connected with the overturning part, the fixing part is sleeved on the overturning part, and the overturning part is connected with the sealing cover part. The rocker arm pushes the overturning part to rotate relative to the fixed part, so that the opening and closing actions of the cover closing part are realized.

As a further optimization of the scheme, the bearing further comprises a first clamping band and a second clamping band, wherein the gas compressor is provided with a first groove, the bearing body is provided with a first bulge, the first groove and the first bulge are mutually nested, and the first clamping band is arranged on the peripheries of the first bulge and the first groove so as to form relative rest of the gas compressor and the bearing body in the axial direction; the turbine case is equipped with the second recess, and the bearing body is equipped with the second arch, and the second recess is nested each other with the second arch, and second clamp strap is located second arch and second recess periphery to form bearing body and turbine case at the ascending relative static of axial direction. The turbine box and the bearing body are connected together through the clamping band, and the relative position of the turbine box and the bearing body can be adjusted randomly along the circumferential direction; the compressor casing and the bearing body are connected together, and the relative position of the compressor volute and the bearing body can be adjusted at will along the circumferential direction.

According to the further optimization of the scheme, a first inclined plane is arranged outside the first protrusion, a second inclined plane is arranged in the first groove, a first V-shaped surface is arranged on the inner side of the first clamping band and is in contact with the first inclined plane, and the first V-shaped surface is in contact with the first inclined plane. The clamping strap is matched with the inclined surface of the clamping strap, and the compressor and the bearing body can be axially tightened by the clamping strap to realize fixation.

According to the further optimization of the scheme, a third inclined plane is arranged outside the second protrusion, a fourth inclined plane is arranged in the second groove, a second V-shaped surface is arranged on the inner side of the second clamping band and is in contact with the third inclined plane, and the second V-shaped surface is in contact with the fourth inclined plane. Through the inclined plane cooperation of clamp area, the clamp area can carry out the axial with turbine case and bearing body and tighten up, realizes fixedly.

According to the scheme, a first O-shaped ring is arranged between the bearing body and the compressor, and a heat insulation cover is arranged between the bearing body and the turbine box. The O-shaped ring realizes the sealing of the compressor, and the heat shield can play a role in protecting the bearing body.

The further optimization as the scheme still includes support and cylinder guard shield, and the cylinder passes through the support mounting on the turbine case, and the cylinder guard shield is located the cylinder periphery. The cylinder is protected by the protective cover.

As further optimization of the scheme, the outer surface of the turbine box is sprayed with organic silicon high-temperature resistant paint. The organic silicon high-temperature resistant anticorrosive paint has excellent high-temperature resistance, can be used at the temperature of 200-600 ℃, resists cold and hot alternation, chemical gas corrosion, weather aging, water, electrical insulation and thermal conductivity; high resistance to oxidation and thermal shock at high temp and excellent anticorrosion nature.

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

through setting up the bypass valve structure, carry out atmospheric pressure regulation for the booster compressor at low-speed climbing, guarantee to maintain stable low-speed operation, through opening cylinder bypass part exhaust energy, make the high-speed regional boost pressure of booster keep in certain extent, unlikely appear to increase boost pressure along with the altitude and continuously rise, lead to the problem that the booster is overspeed.

The turbine box and the bearing body are connected together through the clamping band, and the relative position of the turbine box and the bearing body can be adjusted randomly along the circumferential direction; the compressor casing and the bearing body are connected together, and the relative position of the compressor volute and the bearing body can be adjusted at will along the circumferential direction. And axial tightening and relative fixation can be realized.

The turbine is protected from corrosion by the heat shield and the protective paint.

Drawings

Fig. 1 is a schematic structural diagram of a supercharger for a low-speed large-torque diesel engine provided by the present invention;

FIG. 2 is an enlarged view of a portion of area A of FIG. 1;

FIG. 3 is an enlarged view of a portion of the area B in FIG. 1;

FIG. 4 is an enlarged view of a portion of the area C of FIG. 1;

fig. 5 is an external characteristic torque curve of the supercharger for the low-speed large-torque diesel engine, which is applied to the engine, according to the present invention;

fig. 6 is a characteristic curve of the compressor of the supercharger for the low-speed large-torque diesel engine according to the present invention.

Detailed Description

The present invention is described in detail with reference to the embodiments shown in the drawings, but it should be understood that these embodiments are not intended to limit the present invention, and those skilled in the art should understand that the functions, methods, or structural equivalents or substitutions made by these embodiments are within the scope of the present invention.

In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.

The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the creation of the present invention can be understood by those of ordinary skill in the art through specific situations.

Example 1:

referring to the attached drawings 1-6, the supercharger for the low-speed large-torque diesel engine comprises a gas compressor 1, a bearing body 2 and a turbine box 3, wherein the bearing body 2 is arranged between the gas compressor 1 and the turbine box 3, the turbine box 3 is provided with a first gas outlet and a second gas outlet 32, the supercharger further comprises a cylinder 4, an actuator 5 and a sealing cover part 6, the cylinder 4 is connected with the actuator 5, the actuator 5 is connected with the sealing cover part 6, the cylinder 4 is connected with the gas compressor 1, the gas compressor 1 drives the cylinder 4 to drive the actuator 5 to move, and the actuator 5 drives the sealing cover part 6 to move so as to seal or open the second gas outlet 32.

Through the scheme, the structure provided by the invention has the advantages that when the boost pressure in the high-speed area of the supercharger is too high, the boost pressure in the high-speed area of the supercharger is kept in a certain range by opening the energy of the bypass part of the exhaust gas of the cylinder 4, so that the problem of overspeed of the supercharger caused by continuous rise of the boost pressure along with the increase of the altitude is avoided.

As a further optimization of the scheme, the actuator 5 comprises a push rod 51, a rocker arm 52, an overturning part 53 and a fixing part 54, wherein the push rod 51 is connected with the cylinder 4, the push rod 51 is connected with the rocker arm 52, the rocker arm 52 is connected with the overturning part 53, the fixing part 54 is sleeved on the overturning part 53, and the overturning part 53 is connected with the cover sealing part 6. The swing arm 52 pushes the turning member 53 to rotate relative to the fixed member 54, thereby performing opening and closing operations of the cover member 6.

The sealing cover part 6 is a bypass valve, the actuator 5 is further provided with an adjusting screw, the working air pressure of the air cylinder 4 can be controlled through the adjusting screw to brake, the air cylinder 4 is connected with the air compressor 1 through a rubber pipe, when the air pressure in the press reaches a set value, the air of the press pushes the air cylinder 4 to stretch, the stretching amount of the air cylinder 4 is controlled according to the air pressure, meanwhile, the overturning part 53 is controlled through a push rod 51, a rocker arm 52 and other structures to open the sealing cover part 6, so that the circulation waste energy of the second air outlet 32 is changed, the waste amount of the first air outlet is changed, the turbocharging pressure of the turbocharging is changed, the air inlet pressure of the air compressor 1 is also changed, and the dynamic balance effect is formed.

The supercharger with the air cylinder 4 is installed on a BF12L513C air-cooled diesel engine, an external characteristic test of the diesel engine is carried out on an engine test bench, the optimal supercharging pressure meeting the use requirement is determined by adjusting the size of a screw rod of the supercharger actuator 5, and finally the measured external characteristic torque curve of the engine is shown in figure 5. It can be seen from the figure that the torque of the external characteristic curve of the air-cooled diesel engine in the interval of the diesel engine rotating speed of 1200r/min-1800r/min is in the range of 2200N/m-2250N/m, and the external characteristic curve of the diesel engine runs in the high-efficiency region of the characteristic curve of the supercharger compressor 1, and particularly as shown in figure 6, the diesel engine well achieves the characteristics of relatively flat torque, wide large torque range and sufficient torque reserve at low rotating speed.

Example 2:

referring to fig. 1-6, in the present embodiment, an optimized scheme is provided by a connection and installation manner for the compressor 1, the bearing body 2 and the turbine box 3 to adapt to installation of different engines.

In this embodiment, the axial compression device further comprises a first clamping band 101 and a second clamping band 102, the compressor 1 is provided with a first groove, the bearing body 2 is provided with a first protrusion, the first groove and the first protrusion are nested with each other, and the first clamping band 101 is arranged on the periphery of the first protrusion and the first groove to form relative rest of the compressor 1 and the bearing body 2 in the axial direction; the turbine case 3 is provided with a second groove, the bearing body 2 is provided with a second protrusion, the second groove and the second protrusion are nested with each other, and the second clamping band 102 is arranged on the periphery of the second protrusion and the second groove to form relative rest of the bearing body 2 and the turbine case 3 in the axial direction. The turbine box 3 and the bearing body 2 are connected together through the clamping band, and the relative position of the turbine box 3 and the bearing body 2 can be adjusted randomly along the circumferential direction; the shell of the compressor 1 and the bearing body 2 are connected together, and the relative position of the volute of the compressor 1 and the bearing body 2 can be adjusted at will along the circumferential direction. The traditional supercharger is fixedly welded or connected through bolts, the air compressor 1, the bearing body 2 and the worm gear case are of relatively fixed structures, and generally, a vehicle of one model is used for customizing an engine and nailing the supercharger.

As a further optimization of the scheme, a first inclined surface 21 is arranged outside the first protrusion, a second inclined surface 11 is arranged in the first groove, a first V-shaped surface is arranged inside the first clamping band 101, the first V-shaped surface contacts with the first inclined surface 21, and the first V-shaped surface contacts with the first inclined surface 21. The clamping band can axially tighten the gas compressor 1 and the bearing body 2 through the inclined plane matching of the clamping band, and fixation is achieved.

As a further optimization of the scheme, a third inclined surface 22 is arranged outside the second protrusion, a fourth inclined surface 32 is arranged inside the second groove, a second V-shaped surface is arranged inside the second clamping band 102, the second V-shaped surface is in contact with the third inclined surface 22, and the second V-shaped surface is in contact with the fourth inclined surface 32. Through the inclined plane cooperation of clamp area, the clamp area can carry out the axial with turbine case 3 and bearing body 2 and tighten up, realizes fixedly.

Example 3:

referring to fig. 1 to 6, the present embodiment is further optimized for sealing the compressor 1 and the bearing body 2 and protecting the turbine case 3 and the cylinder 4.

In this embodiment, a first O-ring 8 is disposed between the bearing body 2 and the compressor 1, and a heat shield 9 is disposed between the bearing body 2 and the turbine casing 3. The O-shaped ring realizes the sealing of the compressor 1, and the heat shield 9 can play a role in protecting the bearing body 2. In embodiment 2, the bearing body 2 and the compressor 1 may rotate, and the sealing performance of the compressor 1 needs to be designed specifically to ensure the sealing performance of the compressor 1. Meanwhile, the bearing body 2 is close to the turbine box 3, and waste gas in the turbine box 3 is high-temperature gas, so that heat insulation operation is needed, and lubricating oil in the bearing body 2 is prevented from being heated and inactivated or evaporated.

As a further optimization of the scheme, the device also comprises a bracket and a cylinder shield 41, wherein the cylinder 4 is arranged on the turbine box 3 through the bracket, and the cylinder shield 41 is arranged on the periphery of the cylinder 4. The protection of the cylinder 4 is achieved by a shield. The cylinder 4 is a braking structure for realizing the functions in the above embodiments, and directly affects the use performance of the supercharger.

As the further optimization of the scheme, the outer surface of the turbine box 3 is sprayed with the organic silicon high-temperature resistant paint. The organic silicon high-temperature resistant anticorrosive paint has excellent high-temperature resistance, can be used at the temperature of 200-600 ℃, resists cold and hot alternation, chemical gas corrosion, weather aging, water, electrical insulation and thermal conductivity; high resistance to oxidation and thermal shock at high temp and excellent anticorrosion nature. The turbine case 3 is subject to temperature changes during use and non-use of the vehicle and is susceptible to corrosion.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The supercharger for the low-speed high-torque diesel engine is characterized by comprising a gas compressor (1), a bearing body (2) and a turbine box (3), wherein the bearing body (2) is arranged between the gas compressor (1) and the turbine box (3), the turbine box (3) is provided with a second gas outlet (32), the supercharger further comprises a gas cylinder (4), an actuator (5) and a sealing cover component (6), the gas cylinder (4) is connected with the actuator (5), the actuator (5) is connected with the sealing cover component (6), the gas cylinder (4) is connected with the gas compressor (1), the gas compressor (1) drives the gas cylinder (4) to drive the actuator (5) to move, and the actuator (5) drives the sealing cover component (6) to move so as to realize the plugging or opening of the second gas outlet (32).

2. The supercharger for the low-speed high-torque diesel engine according to claim 1, wherein the actuator (5) comprises a push rod (51), a rocker arm (52), an overturning part (53) and a fixing part (54), the push rod (51) is connected with the cylinder (4), the push rod (51) is connected with the rocker arm (52), the rocker arm (52) is connected with the overturning part (53), the fixing part (54) is sleeved on the overturning part (53), and the overturning part (53) is connected with the cover part (6).

3. A supercharger for a low-speed high-torque diesel engine according to claim 2, characterized by further comprising a first clamping band (101) and a second clamping band (102), wherein the compressor (1) is provided with a first groove, the bearing body (2) is provided with a first protrusion, the first groove and the first protrusion are nested with each other, and the first clamping band (101) is arranged at the periphery of the first protrusion and the first groove to form relative rest of the compressor (1) and the bearing body (2) in the axial direction; the turbine box (3) is provided with a second groove, the bearing body (2) is provided with a second protrusion, the second groove and the second protrusion are mutually nested, and the second clamping band (102) is arranged on the periphery of the second protrusion and the second groove to form relative rest of the bearing body (2) and the turbine box (3) in the axial direction.

4. A supercharger for a low-speed high-torque diesel engine according to claim 3, characterized in that the first protrusion is externally provided with a first inclined surface (21), the first groove is provided with a second inclined surface (11), the first clamping band (101) is internally provided with a first V-shaped surface, the first V-shaped surface is in contact with the first inclined surface (21), and the first V-shaped surface is in contact with the first inclined surface (21).

5. A supercharger for a low-speed and high-torque diesel engine according to claim 4, characterized in that the second protrusion is externally provided with a third inclined surface (22), the second groove is provided with a fourth inclined surface (32), the second clamping band (102) is internally provided with a second V-shaped surface, the second V-shaped surface is in contact with the third inclined surface (22), and the second V-shaped surface is in contact with the fourth inclined surface (32).

6. A supercharger for a low-speed high-torque diesel engine according to claim 5, characterized in that a first O-ring (8) is arranged between the bearing body (2) and the compressor (1), and a heat shield (9) is arranged between the bearing body (2) and the turbine box (3).

7. The supercharger for the low-speed high-torque diesel engine according to claim 6, characterized by further comprising a bracket and a cylinder shroud (41), wherein the cylinder (4) is mounted on the turbine box (3) through the bracket, and the cylinder shroud (41) is arranged on the periphery of the cylinder (4).

8. The supercharger for the low-speed high-torque diesel engine according to claim 7, characterized in that the outer surface of the turbine box (3) is sprayed with silicone high-temperature paint.