CN218717020U - Variable flow double-runner turbine, supercharger with same and vehicle - Google Patents

Abstract

The utility model provides a variable flow double-runner turbine and have its booster and vehicle. A variable flow dual flow turbine comprising: a turbine; the volute is provided with a first flow channel and a second flow channel which are mutually independent, wherein a first air inlet end of the first flow channel is communicated with a first exhaust pipe of an engine, a first air outlet end of the first flow channel is communicated with the turbine, a second air inlet end of the second flow channel is communicated with a second exhaust pipe of the engine, a second air outlet end of the second flow channel is communicated with the turbine, and the first air outlet end and the second air outlet end are symmetrically arranged relative to the geometric center of the turbine. By applying the scheme, the volute is provided with the first flow channel and the second flow channel which are mutually independent, the first air outlet end of the first flow channel and the second air outlet end of the second flow channel are symmetrically arranged relative to the geometric center of the turbine, the technical problem that air flows between the flow channels of a traditional double-flow turbine are mutually interfered is solved, more air is blown to the turbine to push the turbine to do work, and the engine has better low-speed performance.

Description

Variable flow double-runner turbine, supercharger with same and vehicle

Technical Field

The utility model relates to an engine supercharger technical field particularly, relates to a variable flow double fluid channel turbine and have its booster and vehicle.

Background

With the increase of environmental awareness and the increasing strictness of emission regulations, each host factory strives to pursue the power performance of the whole vehicle, reduces the emission and oil consumption of the whole vehicle in a manner of thinking, and reduces the oil consumption of an engine, which is a scientific research direction that the traditional host factory will carry out for a long time in the future. At present, in order to balance dynamic performance and oil consumption, most of main engine plants develop double-runner volute superchargers, work is applied to the runners through exhaust pulses at low speed, the requirement of low-speed torque is met, work is applied to two runners at high speed, and the power target of an engine is met. The power performance and the economy are achieved by the double-blade supercharger, and although the power performance of the engine of the double-channel supercharger is good, the oil consumption cannot reach the ideal state pursued at present.

The prior art dual-channel supercharger has the following problems:

1) Because a small part of the two flow passages are communicated, the two flow passages are still interfered by exhaust gas between different cylinders of the engine, and the gas backflow phenomenon exists;

2) The flow of the volute flow channel is limited, and the pressure before the vortex cannot be continuously reduced, so that the overall oil consumption of the engine is reduced;

3) The middle of the volute flow passage is provided with a partition plate, so that the requirement on temperature is strict, and the volute cracking problem can be caused by high temperature;

4) The vortex end has high exhaust temperature, the design safety is considered, the material is improved, and the cost of the volute is high;

5) The design of the partition plate of the volute runner intermediate body ensures that the runner rotates to a small-area position, and the casting is difficult.

In view of the above technical problems, no effective solution has been proposed at present.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a variable flow double-flow-passage turbine and have its booster and vehicle to solve the problem among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a variable flow double flow turbine comprising: a turbine; the volute is provided with a first flow channel and a second flow channel which are mutually independent, wherein a first air inlet end of the first flow channel is communicated with a first exhaust pipe of an engine, a first air outlet end of the first flow channel is communicated with the turbine, a second air inlet end of the second flow channel is communicated with a second exhaust pipe of the engine, a second air outlet end of the second flow channel is communicated with the turbine, and the first air outlet end and the second air outlet end are symmetrically arranged relative to the geometric center of the turbine.

Further, the first air outlet end and the second air outlet end are symmetrically arranged at 180 degrees relative to the geometric center of the turbine.

Furthermore, the outer surface of the first air inlet end of the first flow channel and the outer surface of the second air inlet end of the second flow channel are arranged in a fitting mode, a partition space is formed between the outer surface of the first flow channel and the outer surface of the second flow channel, and the partition space extends along the length direction of the first flow channel.

Furthermore, the partition space is arranged along the direction from the first air inlet end to the first air outlet end of the first flow channel in a gradually decreasing manner.

Furtherly, all seted up the through-hole structure on the pipe wall of first runner and second runner, set up the regulation hole on the pipe wall of the laminating of first inlet end and second inlet end, variable flow double-runner turbine still includes: and three interfaces of the three-way valve are respectively connected with the through hole structures and the adjusting holes on the pipe walls of the first flow passage and the second flow passage.

Furthermore, the three-way valve has a closed state and at least one open state, and when the three-way valve is in the closed state, the first flow passage and the second flow passage are in mutually independent states; when the three-way valve is in any one opening state, the first flow passage is communicated with the second flow passage.

According to another aspect of the present invention, there is provided a supercharger having a turbine, the turbine being the variable flow dual flow path turbine described above.

According to another aspect of the present invention, there is provided a vehicle having a supercharger, the supercharger being the aforementioned supercharger.

Use the technical scheme of the utility model, the volute has mutually independent first runner and second runner, and the first end of giving vent to anger of first runner and the second of second runner give vent to anger the end and set up about the geometric centre symmetry of turbine, has avoided the technical problem that the air current disturbed each other between the runner of traditional double-flow-channel turbine for there are more gases to blow and promote the turbine work to the turbine, and the engine has better low-speed performance.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1-a shows a schematic structural diagram of a dual-flow turbine according to the prior art;

1-b show a schematic structural view of a first embodiment of a variable flow dual flow turbine according to the present invention;

figure 2 shows a schematic structural view of a second embodiment of a variable flow dual flow turbine according to the present invention;

fig. 3 shows a schematic view of a closed state of a three-way valve according to the invention;

fig. 4 shows a schematic view of an open state of a three-way valve according to the invention;

FIG. 5 shows a schematic diagram of an engine exhaust according to the present disclosure;

fig. 6 shows a schematic diagram of the volute flow variation of a variable flow dual-flow turbine according to the present invention.

Wherein the figures include the following reference numerals:

1. a turbine;

2. a volute; 20. separating the space; 21. a first flow passage; 22. a second flow passage;

3. and a three-way valve.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.

To facilitate understanding of the variable flow dual flow turbine configuration of the present embodiment, a prior art dual flow turbocharger is described as follows:

the double-flow-passage supercharger is provided with two flow passages, the specific structure is that the volute is provided with two flow passages, and the double-flow-passage design of the volute has the following advantages: 1) When the engine is at low speed, the exhaust pulse of the engine is utilized to respectively blow air to the two runners, the exhaust gas speed is high, the power-applying capacity is strong, and the low-speed torque is high; 2) When the engine is at a high speed, the interval time for blowing the two single channels is short due to the high rotating speed of the engine, so that the two sub-channels can be blown at the same time, the gas of the two sub-channels can work on the turbine at the same time, and the effect of improving the power of the engine can be met.

As shown in fig. 1-a, the dual-flow volute set in the prior art has the following disadvantages due to the structural limitation:

1. because a small part of the two flow passages are communicated, the two flow passages are still interfered by exhaust gas between different cylinders of the engine, and the gas backflow phenomenon exists;

2. the flow of the volute flow channel is limited, and the pressure before the vortex cannot be reduced continuously, so that the overall oil consumption of the engine is reduced;

3. the middle of the volute flow passage is provided with a partition plate, so that the requirement on temperature is strict, and the volute cracking problem can be caused by high temperature;

4. the vortex end has high exhaust temperature, and the design is safe, the material is improved, and the cost of the vortex shell is high;

5. the design of the partition plate of the volute runner intermediate body ensures that the runner rotates to a small-area position, and the casting is difficult.

In conclusion, the design of the small part communication between two runners of the double-runner supercharger affects the low-speed performance of the engine, the design of the partition wall between the runners makes the supercharger difficult to cast, the partition plate has certain requirements on the ambient temperature, the structure stability under the high-temperature environment is poor, the manufacturing cost of the supercharger is increased, the flow of the runners is limited due to the fact that the double runners guide the flow respectively, the vortex front pressure cannot be further reduced to reduce the overall oil consumption of the engine, and therefore how to improve the oil consumption of the double-runner supercharger and ensure the low-speed performance are the technical problems to be solved urgently in the technical field of the current engines.

In accordance with a particular embodiment of the present application, shown in connection with fig. 1-b-6, a variable flow dual-flow turbine is provided.

The variable flow dual flow turbine includes: the turbine comprises a turbine 1 and a turbine shell 2, wherein the turbine shell 2 is provided with a first flow passage 21 and a second flow passage 22 which are independent of each other, a first air inlet end of the first flow passage 21 is communicated with a first exhaust pipe of an engine, a first air outlet end of the first flow passage 21 is communicated with the turbine 1, a second air inlet end of the second flow passage 22 is communicated with a second exhaust pipe of the engine, a second air outlet end of the second flow passage 22 is communicated with the turbine 1, and the first air outlet end and the second air outlet end are symmetrically arranged relative to the geometric center of the turbine 1.

By applying the technical scheme of the embodiment, the volute 2 is provided with the first flow passage 21 and the second flow passage 22 which are independent from each other, and the first air outlet end of the first flow passage 21 and the second air outlet end of the second flow passage 22 are symmetrically arranged around the geometric center of the turbine 1, so that the technical problem of mutual interference of air flows between the flow passages of the traditional double-flow turbine is avoided, more air is blown to the turbine 1 to push the turbine 1 to do work, and the engine has better low-speed performance.

Specifically, the first gas outlet end and the second gas outlet end are symmetrically arranged at 180 ° with respect to the geometric center of the turbine 1. The 180-degree symmetrical arrangement can realize a better exhaust pulse separation effect, and avoid the mutual interference or backflow of the waste gas in front of the two flow channels to influence the low-speed performance of the engine.

Further, the outer surface of the first air inlet end of the first flow passage 21 and the outer surface of the second air inlet end of the second flow passage 22 are arranged in a fitting manner, a blocking space 20 is formed between the outer surface of the first flow passage 21 and the outer surface of the second flow passage 22, and the blocking space 20 extends along the length direction of the first flow passage 21. As shown in fig. 2, the arrangement of the partition space 20 replaces the arrangement of a partition plate between the runners in the prior art, so that the partition of the first runner 21 and the second runner 22 is realized, and meanwhile, the problems of high-temperature cracking, difficulty in casting and the like caused by the arrangement of the partition plate are avoided, and the direct arrangement of the partition space 20 also enables the first runner 21 and the second runner 22 to have a good heat dissipation effect.

Preferably, the blocking space 20 is arranged to gradually decrease in a direction from the first air inlet end to the first air outlet end of the first flow channel 21. The arrangement is such that the pressure of the exhaust gas entering the turbine 1 is large, i.e. the pressure of the intake air of the turbine 1 is increased, so as to improve the low-speed performance of the engine.

It should be noted that the size of the partition space 20 should be adjusted according to actual needs (for example, exhaust pressure and exhaust temperature), for example, the partition space 20 may be set to have the same size all the time along the direction from the first air inlet end to the first air outlet end of the first flow passage 21, or the partition space 20 may be set gradually and increasingly along the direction from the first air inlet end to the first air outlet end of the first flow passage 21.

Furthermore, the pipe walls of the first flow passage 21 and the second flow passage 22 are provided with through hole structures, the pipe wall of the first air inlet end attached to the second air inlet end is provided with adjusting holes, the variable flow double-flow-passage turbine further comprises a three-way valve 3, and three interfaces of the three-way valve 3 are respectively connected with the through hole structures and the adjusting holes on the pipe walls of the first flow passage 21 and the second flow passage 22. Through the arrangement of the three-way valve 3, the communication or the partition between the first flow passage 21 and the second flow passage 22 can be realized by adjusting the opening and the closing of the valve of the three-way valve 3, so that the air inlet flow of the turbine is adjusted according to the running states of vehicles and engines, and better low-speed performance and oil consumption effect are obtained.

It should be noted that the three-way valve 3 may be an electrically controlled three-way valve, and the electrically controlled three-way valve may be connected to a controller of the vehicle, and a driver may directly control a valve opening of the three-way valve 3 to adjust communication or isolation between the first flow passage 21 and the second flow passage 22.

Further, the three-way valve 3 has a closed state and at least one open state, and when the three-way valve 3 is in the closed state, the first flow passage 21 and the second flow passage 22 are in a mutually independent state; when the three-way valve 3 is in any one of the open states, the first flow passage 21 and the second flow passage 22 communicate with each other.

Specifically, as shown in fig. 3, when the three-way valve 3 is in a closed state, the first flow passage 21 and the second flow passage 22 are completely isolated, and the flow passages are in a completely sealed state, and when the three-way valve 3 is in any one of open states, the first flow passage 21 and the second flow passage 22 are communicated with each other, and at this time, the opening degree of the valve is adjusted, so that the flow entering the turbine 1 can be adjusted, that is, the flow of the volute 2 can be adjusted, as shown in fig. 4, the three-way valve 3 is in an open state at this time.

The present embodiment further provides a method for controlling the valve opening of the three-way valve 3, which adjusts the valve opening of the three-way valve 3 according to the rotation speed and the load condition of the engine, specifically as follows:

s1, when the engine is at a low speed, the three-way valve 3 is in a closed state, the first flow channel 21 and the second flow channel 22 are not interfered with each other, no airflow interference exists, airflow flowing to the turbine 1 from each flow channel cannot flow to the other flow channel, compared with a double-flow-channel turbine in the prior art, more air is blown to the turbine 1 to push the turbine 1 to do work, and the engine has better low-speed performance;

s2, when the engine is at a high speed and a high load, the three-way valve 3 is in a first opening state, the valve has a first preset opening, redundant gas in one flow passage is discharged to the other flow passage to continuously blow the turbine 1 to do work through the communication between the first flow passage 21 and the second flow passage 22, the circulation capacity of the volute 2 is increased by increasing the circulation space of the volute 2, namely the flow of the volute 2 is increased, the preswirl pressure and preswirl temperature of the turbine 1 are obviously reduced at the moment, combustion can be carried out in an engine cylinder according to a theoretical air-fuel ratio, enrichment is not needed, the oil consumption of the engine is low, and a good discharge effect is achieved;

s3, when the engine is at a high speed and under a low load, the three-way valve 3 is in a second opening state, the valve has a second preset opening degree, the flow of the volute 2 is increased through the communication between the first flow passage 21 and the second flow passage 22, the pressure and the temperature in front of the vortex of the turbine 1 are obviously reduced, the pumping loss is reduced, and the oil consumption of the engine is obviously reduced.

Fig. 6 is a comparison graph of the volute flow rate of the dual-flow turbine according to the present embodiment and the volute flow rate of the dual-flow turbine according to the prior art, as shown in fig. 6, where the horizontal axis is the expansion ratio and the vertical axis is the volute flow rate, (1) is the volute flow rate variation curve when the valve opening of the three-way valve 3 is 100%, (2) is the volute flow rate variation curve when the valve opening of the three-way valve 3 is 50%, (3) is the volute flow rate variation curve when the valve opening of the three-way valve 3 is 0% (i.e., the valve is closed).

According to another embodiment of the present application, there is provided a supercharger having a turbine that is a variable flow dual flow turbine as described above.

According to another embodiment of the present application, there is provided a vehicle having a supercharger as described above. As shown in FIG. 5, in an exemplary embodiment of the present application, the vehicle further comprises an air filter, a compressor, a turbocharger, a throttle valve, an engine, a throttle valve, a turbine, a catalytic converter, an EGR valve, an EGR cooler, wherein the turbine is the variable flow two-flow turbine described above.

For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition to the foregoing, it should be noted that reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally throughout this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the invention to effect such feature, structure, or characteristic in connection with other embodiments.

In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A variable flow dual flow turbine, comprising:

a turbine (1);

the volute (2), the volute (2) has mutually independent first runner (21) and second runner (22), wherein, the first inlet end of first runner (21) and the first exhaust pipe intercommunication of engine, the first end of giving vent to anger of first runner (21) with turbine (1) intercommunication, the second inlet end of second runner (22) with the second exhaust pipe intercommunication of engine, the second end of giving vent to anger of second runner (22) with turbine (1) intercommunication, first end of giving vent to anger with the second end of giving vent to anger about the geometric centre symmetry setting of turbine (1).

2. Variable flow dual flow turbine according to claim 1, wherein the first outlet end and the second outlet end are arranged 180 ° symmetrically with respect to the geometric centre of the turbine (1).

3. The variable flow dual flow turbine of claim 1, wherein an outer surface of a first inlet end of the first flow passage (21) is arranged in close contact with an outer surface of a second inlet end of the second flow passage (22), and a blocking space (20) is formed between the outer surface of the first flow passage (21) and the outer surface of the second flow passage (22), wherein the blocking space (20) extends along the length direction of the first flow passage (21).

4. The variable flow dual flow turbine according to claim 3, wherein the shut-off spaces (20) are arranged in a decreasing manner in the direction from the first inlet end to the first outlet end of the first flow channel (21).

5. The variable flow double-flow-passage turbine according to claim 3, wherein the pipe walls of the first flow passage (21) and the second flow passage (22) are provided with through hole structures, the pipe wall of the first air inlet end and the second air inlet end, which are jointed, is provided with an adjusting hole, and the variable flow double-flow-passage turbine further comprises:

and three interfaces of the three-way valve (3) are respectively connected with the through hole structures and the adjusting holes on the pipe walls of the first flow passage (21) and the second flow passage (22).

6. The variable flow dual flow turbine according to claim 5, characterized in that the three-way valve (3) has a closed condition and at least one open condition, the first flow path (21) and the second flow path (22) being independent of each other when the three-way valve (3) is in the closed condition; when the three-way valve (3) is in any one of the open states, the first flow passage (21) and the second flow passage (22) are communicated with each other.

7. A supercharger having a turbine, characterised in that the turbine is a variable flow two-flow turbine as claimed in any one of claims 1 to 6.

8. A vehicle having a supercharger, wherein the supercharger is the supercharger of claim 7.

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