CN201137516Y - Semi-circular twin-channel turbocharger - Google Patents

Abstract

The semi-circular double-channel turbocharger includes a turbine, an intermediate body, and a compressor. The turbine includes a volute, a turbine, a wheel shaft, and blades. The turbine is set on the front end of the wheel shaft and connected into one body by welding. There are double flow channels in the turbine casing, namely, 1# flow path, 2# flow path, 1# flow path, and 2# flow path. #The inner cavity of the runner is semicircular. A plurality of blades are arranged on the turbine, and the turbine is a radial flow type. The intermediate body and the volute are fixedly connected by bolts. There are two floating bearings in the middle of the wheel shaft. The two floating bearings are located at both ends of the intermediate body and embedded in the bearing seat hole of the intermediate body. The compressor casing and the intermediate body are connected by bolts. Fasten the connection. The utility model is designed scientifically and creatively, improves the efficiency of the engine, reduces the discharge of exhaust gas from the engine, has strong practicability, simple, compact and tight overall structure, less consumables, low cost, stable and reliable performance, convenient maintenance, and is suitable for For use with the engine.

Description

Semi-circular twin-channel turbocharger

technical field

The utility model relates to an engine supercharger, in particular to a high-efficiency turbocharger which can still work stably under high temperature, high pressure and harsh environment conditions.

Background technique

With the development of science and technology, it has greatly promoted the development and improvement of the engine industry, and correspondingly, the supercharger used with the engine has also been continuously updated and developed rapidly. Although the air intake boosting of the engine is a relatively mature technology, and there are various types of superchargers, however, sometimes the supercharger cannot work stably and reliably under the specific environment and use conditions, so that it cannot output the maximum power. . Usually, in order to increase the intake air volume and intake pressure, the method of increasing the speed of the supercharger has to be adopted, so that the working speed reaches more than 60,000 rpm, plus it works at an ambient temperature of several hundred degrees, which is not a general supercharger. device can withstand.

At present, there is no supercharger with large intake air volume and large intake pressure, which can adapt to the working conditions of high temperature and high pressure.

Contents of the invention

The purpose of this utility model is to solve the problem that the currently used supercharger is not suitable for operation in a high-temperature and high-pressure environment, the intake air volume is not large, and the intake air pressure is not high, and the number of rotations provided can reach more than 70,000 rpm. Large gas volume, high efficiency, semi-circular dual-channel turbocharger suitable for working under harsh environmental conditions.

The technical solutions adopted are:

The semi-circular double-channel turbocharger includes a turbine, an intermediate body, and a compressor. The turbine includes a volute, a turbine, a wheel shaft, and blades. The turbine is set on the front end of the wheel shaft and connected into one body by welding. A heat shield is arranged at the front of the wheel shaft. The heat shield is located between the turbine and the intermediate body. The body and the volute are fixedly connected by bolts. The intermediate body is installed outside the middle part of the wheel shaft. There are two floating bearings in the middle part of the wheel shaft. The two floating bearings are located at both ends of the middle body and embedded in the bearing seat hole of the middle body. Inside, a thrust bearing is installed at the rear of the axle, and the thrust bearing is against the thrust ring, and the thrust bearing is located in the thrust bearing seat hole at the front end of the compressor casing; the compressor casing and the intermediate body are fastened and connected by screws, The main points of its structure are:

The turbine shell is provided with double flow passages, that is, 1# flow passage and 2# flow passage, and the inner cavities of 1# flow passage and 2# flow passage are semicircular.

The turbine is provided with a plurality of blades, and the plurality of blades are planar and vertically fixedly connected with the turbine, and the turbine is of a radial flow structure.

Working principle and features:

There are turbines and compressors before and after the turbocharger. The inlet of the turbine is connected to the engine exhaust pipe outside the turbocharger. The gas with a certain pressure discharged from the engine is sprayed on the blades of the turbine in the form of airflow, so that The turbine can be accelerated to rotate, thereby driving the compressor to rotate, and the exhaust gas injected into the blades is discharged from the exhaust pipe connecting the outlet of the turbine to the equipment other than the supercharger. The inlet of the compressor is connected to the air filter pipe outside the supercharger, so that the fast rotation of the compressor will continuously draw in fresh air from the air filter, and the outlet of the compressor is connected to the engine intake pipe, and the fresh air After being compressed by the compressor, the high-pressure gas is continuously sent into the engine. When the engine speed increases, the exhaust gas discharge speed increases, and the turbine speed also increases synchronously, the compressor will compress more air into the cylinder, and the pressure and density of the air will increase to burn more fuel, and the fuel will burn more fully. The combustion efficiency is improved, the rotational speed of the engine is increased, and the output efficiency of the engine is improved. It not only saves fuel, but also reduces the pollution of exhaust gas.

The HX80 turbocharger is installed on the KTA50 engine. The turbocharger adopts a floating bearing. Because there is oil between the bearing and the inner wall of the body for cooling, it is a "full floating bearing". Its working speed can reach more than 80,000 rpm, and it can operate in an environment where the ambient temperature is above 600 or 700 degrees. The cavity is semicircular, and the turbine is equipped with multiple blades, which are flat and vertically fixedly connected to the turbine, and the turbine is of a radial flow structure, which greatly reduces the resistance of the exhaust gas of the engine in the volute flow channel and increases The flow rate of the gas is increased, and the force injected on the blades of the turbine is greatly increased, thereby greatly improving the efficiency of the supercharger.

The characteristics of this turbocharger are:

1. The high-quality material that is resistant to high temperature is selected (K418 material is used for the turbine), which ensures the continuous high-speed operation of the turbocharger for a long time in a high-temperature and high-pressure environment.

2. Advanced processing equipment and precise detection methods are used to ensure the high precision of parts processing.

3. The sealing point of the turbocharger is sealed with a sealing ring and a rubber ring. The sealing performance is excellent, and no leakage has occurred after long-term use.

4 The production process is advanced, and computer control is adopted to make the dynamic balance accuracy of the rotor assembly within 0.001mm.

5 Finally, through the bench test, the whole machine checks all the technical performances of the supercharger.

The design of the utility model is scientific, reasonable and creative, which increases the intake pressure and intake volume of the engine, thereby making the fuel burn more fully, improving the efficiency of the engine, reducing the emission of exhaust gas from the engine, and having strong practicability, replacing the imported Supercharger. The overall structure is simple, compact and tight, less consumables, low cost, stable and reliable performance, and convenient maintenance. The utility model is suitable for matching with the engine.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a structural schematic diagram of the volute of the present invention.

Fig. 3 is a schematic cross-sectional view taken along line A-A of Fig. 2 .

Fig. 4 is a schematic cross-sectional view taken along the line B-B in Fig. 2 .

Fig. 5 is a schematic sectional view taken along line C-C of Fig. 2 .

Detailed ways

Example

The semi-circular double-channel turbocharger includes a turbine, an intermediate body 4, and a compressor. The turbine includes a volute 1, a turbine 2, a wheel shaft 11, and blades 12. The turbine 2 is set on the front end of the wheel shaft 11 and connected into one body by welding. The volute 1 is provided with double flow channels 13 and 14, namely 1# flow The inner cavities of channel 13, 2# flow channel 14, 1# flow channel 13 and 2# flow channel 14 are semicircular. The turbine 2 is provided with 12 blades 12, and the 12 blades 12 are planar and vertically fixedly connected with the turbine 2, and the turbine 2 has a radial flow structure. A heat shield 3 is arranged at the front of the wheel shaft 11, the heat shield 3 is located between the turbine 2 and the intermediate body 4, the intermediate body 4 and the volute 1 are fixedly connected by bolts, and the intermediate body 4 is installed in the middle of the wheel shaft 11 Externally, the middle part of the wheel shaft 11 is provided with two floating bearings 6, the two floating bearings 6 are located at both ends of the intermediate body 4, and are embedded in the bearing seat hole 5 of the intermediate body 4, and a stop is installed at the rear of the wheel shaft 11. The thrust bearing 10, the thrust bearing 10 and the thrust ring 7 abut against each other, the thrust bearing 10 is located in the thrust bearing seat hole 9 at the front end of the compressor casing 8; the compressor casing 8 and the intermediate body 4 are fastened and connected by bolts.

Claims (1)

1, semicircle double flow channel turbosupercharger comprises turbo machine, intermediate (4), gas compressor; Described turbo machine comprises volute (1), turbine (2), wheel shaft (11), blade (12), turbine (2) is sleeved on the front end of wheel shaft (11), be integral by being welded to connect, in wheel shaft (11) front portion one thermal baffle (3) is set, thermal baffle (3) is positioned between turbine (2) and the intermediate (4), intermediate (4) is bolted to connection with volute (1), intermediate (4) is installed in the outside of the intermediate portion of wheel shaft (11), the intermediate portion of wheel shaft (11) is provided with two floating bearings (6), two floating bearings (6) are positioned at the two ends of intermediate (4), and be embedded in the bearing saddle bore (5) of intermediate (4), a thrust bearing (10) is installed at the rear portion of wheel shaft (11), thrust bearing (10) is replaced mutually with thrust ring (7), and thrust bearing (10) is arranged in the thrust shaft block hole (9) of compressor casing (8) front end; Compressor casing (8) is connected by bolton with intermediate (4), it is characterized in that:

Be provided with double flow channel (13) and (14) in the described volute (1), i.e. 1# runner (13), 2# runner (14), the inner chamber of 1# runner (13), 2# runner (14) are semicircle;

Described turbine (2) is provided with a plurality of blades (12), and a plurality of blades (12) are planely to be connected with turbine (2) vertical fixing, and turbine (2) is the radial-flow type structure.

Images