CN211652072U - Turbocharger variable-altitude simulation test bed - Google Patents
Turbocharger variable-altitude simulation test bed Download PDFInfo
- Publication number
- CN211652072U CN211652072U CN201922438031.6U CN201922438031U CN211652072U CN 211652072 U CN211652072 U CN 211652072U CN 201922438031 U CN201922438031 U CN 201922438031U CN 211652072 U CN211652072 U CN 211652072U
- Authority
- CN
- China
- Prior art keywords
- air
- combustion chamber
- air inlet
- turbine
- centrifugal compressor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Of Engines (AREA)
- Supercharger (AREA)
Abstract
A turbocharger elevation-variable simulation test bed is characterized in that an air compressor externally connected with an air source is connected with an air inlet end of a combustion chamber, a fuel system supplies fuel to the combustion chamber, an air outlet end of the combustion chamber is connected with an inlet end of a turbine, an outlet end of the turbine is connected with an inlet end of an exhaust pressure stabilizing box, an outlet end of the exhaust pressure stabilizing box is connected with an inlet end of a vacuum pump, and an outlet end of the vacuum pump is communicated with the atmospheric environment; the centrifugal compressor is coaxially connected with the turbine, the air inlet end of the centrifugal compressor is connected with the outlet end of the air inlet pressure stabilizing box, the inlet pipe of the air inlet pressure stabilizing box is connected with the atmosphere, the air outlet end of the centrifugal compressor is connected with an air outlet pipeline, and a back pressure regulating valve and a quick surge relief valve are connected on the pipeline in parallel; and an air outlet pipeline of the centrifugal compressor is communicated with an air inlet pipe of the combustion chamber. The utility model discloses can simulate the atmospheric environment of turbo charger when becoming the actual work of height above sea level to research turbo charger centrifugal compressor characteristic and turbine efficiency characteristic under this condition respectively.
Description
Technical Field
The utility model belongs to the technical field of the engine, in particular to turbo charger becomes height above sea level analogue test platform.
Background
The altitude area of our country is wide, the altitude is high and the altitude variation range is large, which not only has the altitude work requirement for the internal combustion engine, but also has the altitude change work requirement. Turbocharging is taken as an important means for meeting the plateau working requirement of the internal combustion engine, and the matching design method of the turbocharger, which is a key part for realizing the turbocharging, has important influence on improving the variable altitude performance of the supercharged internal combustion engine. With the continuous improvement of the requirements of dynamic property, economy and emission performance of the internal combustion engine under the condition of variable altitude, the high altitude design and the matching method of the turbocharger become the key for restricting the improvement of the variable altitude performance of the internal combustion engine.
The traditional vehicle engine generally adopts a piston type internal combustion engine, because the motion characteristics of a rotary impeller machine and a reciprocating piston are different, although better performance can be obtained under a certain matching design point working condition of a turbocharger, when the internal combustion engine actually works under a variable altitude condition, once the working condition changes, particularly the air inlet and exhaust environment changes, the actual operation line of the internal combustion engine and the matching combined operation line of the turbocharger deviate, and the phenomenon of mismatching is generated, so that the performance indexes of the internal combustion engine, such as dynamic property, economical efficiency and the like, are obviously reduced.
Therefore, the characteristic rule of the turbocharger under the conditions of intake and exhaust pressure and temperature change is simulated and researched by a test method, and the characteristic rule has important significance for improving the altitude-variable performance of the internal combustion engine.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the not enough of existence among the above-mentioned prior art, and provide a turbo charger becomes height above sea level analogue test platform, this test bench can realize simulating turbo charger and changing the atmospheric environment of height above sea level actual work time to study turbo charger centrifugal compressor characteristic and turbine efficiency characteristic under this condition respectively, make turbo charger capability test result more be close to the actual motion operating mode, solve present turbo charger capability test platform and can only study the problem of turbo charger performance at fixed height above sea level during operation.
In order to achieve the above object, the utility model provides a following technical scheme:
a turbocharger variable altitude simulation test bed comprises an air compressor externally connected with an air source, a combustion chamber, a turbine, an exhaust pressure stabilizing box, a vacuum pump, a centrifugal compressor and an air inlet pressure stabilizing box; the method is characterized in that: an air compressor externally connected with an air source is connected with an air inlet end of a combustion chamber through an air inlet pipe of the combustion chamber, a fuel system supplies fuel to the combustion chamber through a fuel injection hole in the combustion chamber, an air outlet end of the combustion chamber is connected with an inlet end of a turbine through an air inlet pipe of the turbine, an outlet end of the turbine is connected with an inlet end of an exhaust pressure stabilizing box through a turbine exhaust pipe, a heat exchanger is arranged on a connecting pipe, an outlet end of the exhaust pressure stabilizing box is connected with an inlet end of a vacuum pump, a back pressure regulating valve is arranged on the connecting pipe, the outlet end of the vacuum pump is communicated with the atmospheric environment; the centrifugal compressor is coaxially connected with the turbine, the air inlet end of the centrifugal compressor is connected with the outlet end of an air inlet pressure stabilizing box, an inlet pipe of the air inlet pressure stabilizing box is connected with the atmosphere, an air inlet throttle valve and a temperature control device are installed on a pipeline, the air outlet end of the centrifugal compressor is connected with an air outlet pipeline and leads to the atmosphere, and a back pressure regulating valve and a quick surge relief valve are connected on the pipeline in parallel; an air outlet pipeline of the centrifugal compressor is communicated with an air inlet pipe of the combustion chamber, and a two-position four-way valve is arranged on the connecting pipe.
And an air heater, an air source air inlet adjusting valve, a pressure gauge and a flowmeter are arranged on the combustion chamber air inlet pipe.
And a pressure transmitter, a temperature transmitter, an inlet temperature sensor, an inlet total pressure sensor and an inlet static pressure sensor are arranged on the combustion chamber air outlet pipe.
The shaft of the centrifugal compressor and the shaft of the turbine which are coaxially connected are lubricated by a lubricating system,
and a pressure transmitter, a temperature transmitter, an outlet temperature sensor, an outlet total pressure sensor and an outlet static pressure sensor are arranged on an air outlet pipeline connected with an air outlet end of the air compressor in the centrifugal mode.
A rotating speed sensor is arranged in the centrifugal compressor to measure the rotating speed of the supercharger.
The utility model discloses a test bench can realize simulating the atmospheric environment of turbocharger when changing height above sea level (0 ~ 5500m height above sea level scope) actual work to study turbocharger centrifugal compressor characteristic and turbine efficiency characteristic under this condition respectively, make turbocharger performance test result more be close to the actual motion operating mode, solve present turbocharger performance test bench and can only study the problem of turbocharger performance at fixed height above sea level during operation.
Drawings
FIG. 1 is a schematic view of the connection and operation of the test bed of the present invention;
FIG. 2 is a schematic view of the arrangement of the measuring points of the turbine variable altitude efficiency characteristic test performed by the test bed of the utility model;
FIG. 3 is a schematic view of the arrangement of the measuring points of the centrifugal compressor variable altitude characteristic test performed by the test bed of the utility model;
fig. 4 is the utility model discloses simulation inlet pressure and temperature schematic diagram that experimental different simulation altitudes correspond.
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 present application, 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.
The present invention will be described in detail below with reference to the accompanying drawings by way of examples.
Referring to fig. 1, the turbocharger elevation-variable simulation test bed comprises an air compressor 1 externally connected with an air source, a combustion chamber 5, a turbine 6, an exhaust pressure stabilizing box 8, a vacuum pump 10, a centrifugal compressor and an air inlet pressure stabilizing box. An air compressor 1 externally connected with an air source is connected with an air inlet end of a combustion chamber through a combustion chamber air inlet pipe, a fuel oil system supplies fuel oil to the combustion chamber through a fuel oil injection hole in the combustion chamber, an air outlet end of the combustion chamber is connected with an inlet end of a turbine through a turbine air inlet pipe, an outlet end of the turbine is connected with an inlet end of an exhaust pressure stabilizing box 8 through a turbine exhaust pipe, a heat exchanger 7 is arranged on a connecting pipe, an outlet end of the exhaust pressure stabilizing box 8 is connected with an inlet end of a vacuum pump 10, a backpressure regulating valve 9 is arranged on the connecting pipe, an outlet end of the vacuum pump is communicated with the atmospheric environment, and the. And an air heater, a pressure gauge 2, a flow meter 3 and an air source air inlet regulating valve 4 are arranged on the combustion chamber air inlet pipe. And a pressure transmitter 11, a temperature transmitter 12, an inlet temperature sensor 13, an inlet total pressure sensor 14 and an inlet static pressure sensor 15 are arranged on the combustion chamber air outlet pipe.
The centrifugal compressor 16 is coaxially connected with the turbine 6, the air inlet end of the centrifugal compressor is connected with the outlet end of an air inlet pressure stabilizing box 17, the inlet pipe of the air inlet pressure stabilizing box is connected with the atmosphere, an air inlet throttle valve 18 and a temperature control device 19 are installed on a pipeline, the air outlet end of the centrifugal compressor is connected with an air outlet pipeline to lead to the atmosphere, and a back pressure regulating valve 20 and a quick surge relief valve 21 are connected in parallel on the pipeline; an air outlet pipeline of the centrifugal compressor is communicated with an air inlet pipe of the combustion chamber, and a two-position four-way valve 22 is arranged on a connecting pipe. And a pressure transmitter 23, a temperature transmitter 24, an outlet temperature sensor 25, an outlet total pressure sensor 26 and an outlet static pressure sensor 27 are arranged on an air outlet pipeline connected with the air outlet end of the air compressor in the centrifugal mode. The shaft of the centrifugal compressor and the shaft of the turbine which are coaxially connected are lubricated by a lubricating system, and a rotating speed sensor is arranged in the centrifugal compressor to measure the rotating speed of the supercharger.
The test method for carrying out variable altitude simulation based on the turbocharger variable altitude simulation test bed comprises the following specific steps:
step one, adjust turbo charger to the stable test condition in plain:
firstly, a supercharger is installed on a variable-altitude simulation test bed of the turbocharger, fuel oil, lubricating liquid and cooling liquid are added, and a wiring harness for connecting a rack and the supercharger is prepared to be in a normal working state.
And then, starting an air inlet system at the air compressor end and an air source at the turbine end, adjusting to a standard atmospheric environment condition, igniting a combustion chamber to simulate the combustion heating process of the engine (the mass flow of high-temperature gas generated by heating the combustion chamber covers 0.12-1.20 kg/s, the outlet heating temperature is 300-900 ℃), pushing a turbine to do work, driving the air compressor to compress air, and confirming the working state of the supercharger.
Secondly, carrying out a centrifugal compressor altitude change characteristic test:
firstly, opening an air inlet pressure stabilizing box (the volume of the air inlet pressure stabilizing box is such that the Mach number of the air flow velocity is less than 0.05) and a connecting valve of the air inlet pressure stabilizing box, adjusting the air inlet pressure through an air inlet throttle valve of a centrifugal compressor, adjusting the air inlet temperature through a temperature control device of the air inlet pressure stabilizing box, adjusting the air inlet pressure (101.33kPa) and the temperature (15 ℃) of the centrifugal compressor, wherein the simulated altitude is 0m, and changing the opening of an air inlet valve at a turbine end or adjusting the fuel quantity of a combustion chamber to adjust the rotating speed of a supercharger according to the total temperature of an inlet of the centrifugal compressor and the required folding rotating. The measurement sequence can be from the highest allowable speed to the lowest used speed, and the equal speed lines are stepped at proper intervals, but not less than 5. The working flow of the compressor is adjusted by adjusting the pressure intensity of the outlet of the compressor through a back pressure valve at the end of the centrifugal compressor, each equal folding rotating speed line is measured point by point (at least 5 points are measured) from the surge flow to the blocking flow during the test, and the rotating speed of the supercharger, the flow of the compressor, the total pressure of the inlet gas of the compressor, the total pressure of the outlet gas of the compressor, the total temperature of the inlet gas of the compressor and the total temperature of the outlet gas of the compressor are. When the compressor runs near a surge area, the air flow of the compressor is slowly reduced, and a surge point of the compressor is measured; when the compressor is close to the blockage area, the air flow of the compressor is slowly increased, and the blockage point of the compressor is measured.
Then, the intake pressure and temperature are adjusted to the calibration values corresponding to the simulated target altitude (the simulated intake pressure and temperature corresponding to different simulated altitudes are shown in fig. 4), and the supercharger rotation speed, the compressor flow rate, the compressor inlet gas total pressure, the compressor outlet gas total pressure, the compressor inlet gas total temperature and the compressor outlet gas total temperature are recorded by referring to the steps.
Finally, the intake pressure (101.33kPa) and temperature (15 ℃) were adjusted, and when the environment stabilized to the standard atmospheric environment, the bench state was confirmed again. And stopping the supercharger after the supercharger works stably, checking and recording the condition of the test bed, and providing an actual measurement result for data processing and evaluation after optimization.
Thirdly, carrying out a turbine altitude-variable efficiency characteristic test:
firstly, an external air source at the turbine end is opened to compress air, and the air is heated to drive the turbine to rotate stably. And meanwhile, the vacuum pump is opened, the pressure of the exhaust pressure stabilizing box, namely the exhaust back pressure, is controlled by adjusting the back pressure adjusting valve, the temperature of the simulated atmosphere environment is adjusted by the pressure stabilizing box temperature control system, the exhaust back pressure (101.33kPa) and the temperature (15 ℃) of the turbine end are adjusted, the simulated atmosphere environment conditions in the whole test process are kept consistent, and thus the measurement error is avoided. The oil pressure at the inlet of the lubricating oil of the supercharger is (3 +/-0.5) multiplied by 100 kPa; the temperature of the inlet oil is 50-75 ℃, and the temperature of the outlet oil is not more than 120 ℃. The supercharger test speed deviation should be controlled within the range of +/-0.5% of the rotation speed. The turbine efficiency characteristic test is carried out step-by-step measurement according to the Mach number of the circumference of the wheel or similar rotating speed, and the rotating speed of the turbine, the flow rate of inlet gas, the static pressure of the inlet gas, the total temperature of the inlet gas, the static pressure of the outlet gas, the total pressure of the outlet gas and the total temperature of the outlet gas are recorded.
And then, adjusting the exhaust back pressure and the exhaust temperature to the calibration values corresponding to the simulated target altitude, and recording the turbine rotation speed, the inlet gas flow, the inlet gas static pressure, the inlet gas total temperature, the outlet gas static pressure, the outlet gas total pressure and the outlet gas total temperature by referring to the steps.
Finally, the exhaust back pressure (101.33kPa) and the temperature (15 ℃) were adjusted, and when the environment was stabilized to the standard atmospheric environment, the state of the test bench was confirmed again. And stopping the supercharger after the supercharger works stably, checking and recording the condition of the test bed, and providing an actual measurement result for data processing and evaluation after optimization.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. A turbocharger variable altitude simulation test bed comprises an air compressor externally connected with an air source, a combustion chamber, a turbine, an exhaust pressure stabilizing box, a vacuum pump, a centrifugal compressor and an air inlet pressure stabilizing box; the method is characterized in that: an air compressor externally connected with an air source is connected with an air inlet end of a combustion chamber through an air inlet pipe of the combustion chamber, a fuel system supplies fuel to the combustion chamber through a fuel injection hole in the combustion chamber, an air outlet end of the combustion chamber is connected with an inlet end of a turbine through an air inlet pipe of the turbine, an outlet end of the turbine is connected with an inlet end of an exhaust pressure stabilizing box through a turbine exhaust pipe, a heat exchanger is arranged on a connecting pipe, an outlet end of the exhaust pressure stabilizing box is connected with an inlet end of a vacuum pump, a back pressure regulating valve is arranged on the connecting pipe, the outlet end of the vacuum pump is communicated with the atmospheric environment; the centrifugal compressor is coaxially connected with the turbine, the air inlet end of the centrifugal compressor is connected with the outlet end of an air inlet pressure stabilizing box, an inlet pipe of the air inlet pressure stabilizing box is connected with the atmosphere, an air inlet throttle valve and a temperature control device are installed on a pipeline, the air outlet end of the centrifugal compressor is connected with an air outlet pipeline and leads to the atmosphere, and a back pressure regulating valve and a quick surge relief valve are connected on the pipeline in parallel; an air outlet pipeline of the centrifugal compressor is communicated with an air inlet pipe of the combustion chamber, and a two-position four-way valve is arranged on the connecting pipe.
2. The turbocharger variable-altitude simulation test bed according to claim 1, wherein: and an air heater, an air source air inlet adjusting valve, a pressure gauge and a flowmeter are arranged on the combustion chamber air inlet pipe.
3. The turbocharger variable-altitude simulation test bed according to claim 1, wherein: and a pressure transmitter, a temperature transmitter, an inlet temperature sensor, an inlet total pressure sensor and an inlet static pressure sensor are arranged on the combustion chamber air outlet pipe.
4. The turbocharger variable-altitude simulation test bed according to claim 1, wherein: and the shaft of the centrifugal compressor and the shaft of the turbine which are coaxially connected are lubricated by a lubricating system.
5. The turbocharger variable-altitude simulation test bed according to claim 1, wherein: and a pressure transmitter, a temperature transmitter, an outlet temperature sensor, an outlet total pressure sensor and an outlet static pressure sensor are arranged on an air outlet pipeline connected with an air outlet end of the air compressor in the centrifugal mode.
6. The turbocharger variable-altitude simulation test bed according to claim 1, wherein: a rotating speed sensor is arranged in the centrifugal compressor to measure the rotating speed of the supercharger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922438031.6U CN211652072U (en) | 2019-12-30 | 2019-12-30 | Turbocharger variable-altitude simulation test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922438031.6U CN211652072U (en) | 2019-12-30 | 2019-12-30 | Turbocharger variable-altitude simulation test bed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211652072U true CN211652072U (en) | 2020-10-09 |
Family
ID=72700953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922438031.6U Active CN211652072U (en) | 2019-12-30 | 2019-12-30 | Turbocharger variable-altitude simulation test bed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211652072U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427975A (en) * | 2022-01-27 | 2022-05-03 | 中国航发沈阳发动机研究所 | Tandem type combined power mode conversion verification method |
-
2019
- 2019-12-30 CN CN201922438031.6U patent/CN211652072U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114427975A (en) * | 2022-01-27 | 2022-05-03 | 中国航发沈阳发动机研究所 | Tandem type combined power mode conversion verification method |
| CN114427975B (en) * | 2022-01-27 | 2023-07-21 | 中国航发沈阳发动机研究所 | Series combined power mode conversion verification method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111089727A (en) | Turbocharger variable-altitude simulation test bed and test method | |
| CN101532910B (en) | Acceleration performance evaluation test method and test apparatus of turbo-charger | |
| US9133792B2 (en) | Unit for estimating the rotational speed of a turbocharger and system and method for controlling an internal combustion engine with a turbocharger | |
| CN104234820B (en) | A kind of two turbocharging systems test device and method of testing thereof | |
| Jung et al. | Parameterization and transient validation of a variable geometry turbocharger for mean-value modeling at low and medium speed-load points | |
| CN204082312U (en) | A kind of two turbocharging systems testing apparatus | |
| CN101375293A (en) | Apparatus and method for compressor and turbine performance simulation | |
| CN110261127B (en) | On-line detection method for carbon deposit jamming of variable cross-section turbocharger of engine | |
| CN103477057A (en) | Turbocharger boost control using exhaust pressure estimated from engine cylinder pressure | |
| CN110543715B (en) | Two-stage supercharging system matching method based on simulation calculation | |
| CN102798520A (en) | Comprehensive test bench of turbocharger | |
| CN112362221B (en) | Method for determining pressure of exhaust manifold of turbocharging | |
| Winkler et al. | Simulations and measurements of a two-stage turbocharged heavy-duty diesel engine including egr in transient operation | |
| Terdich et al. | Off-road diesel engine transient response improvement by electrically assisted turbocharging | |
| CN111894882A (en) | Variable-altitude two-stage centrifugal compressor characteristic test system | |
| CN112431700A (en) | Measuring device and method for variable-altitude fuel injection strategy of oxygen-containing mixed fuel diesel engine | |
| CN102818706A (en) | Simulating test method for plateau performance of supercharged engine and device for implementing simulating test method | |
| CN211652072U (en) | Turbocharger variable-altitude simulation test bed | |
| CN113588312B (en) | Plateau low-pressure performance simulation test device for air-cooled radiator | |
| CN113530666B (en) | Method for regulating and controlling rotating speed of turbocharger | |
| CN111076941A (en) | double-VGT two-stage adjustable supercharger test system | |
| CN202451313U (en) | Accessory supercharging system for diesel rack testing | |
| CN102434333A (en) | Auxiliary pressurization system for diesel engine bench test and using method of auxiliary pressurization system | |
| CN211652075U (en) | double-VGT two-stage adjustable supercharger test system | |
| US10519881B2 (en) | Compressor pressure ratio control |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |