CN111963490A

CN111963490A - Vibration suppression structure of vane diffuser of turbocharger

Info

Publication number: CN111963490A
Application number: CN202010789629.4A
Authority: CN
Inventors: 王振彪; 张炜
Original assignee: China North Engine Research Institute Tianjin
Current assignee: China North Engine Research Institute Tianjin
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2020-11-20
Anticipated expiration: 2040-08-07
Also published as: CN111963490B

Abstract

The invention provides a vibration suppression structure of a bladed diffuser of a turbocharger. The invention is provided with a plurality of air taking holes on the bearing body of the supercharger, and is provided with a vibration sensor and an electromagnetic valve, when the supercharger body vibrates greatly, the controller controls the electromagnetic valve to introduce the air of the compressor between the outlet of the impeller of the compressor and the inlet of the blades of the diffuser, thereby eliminating local airflow vortex, reducing the pressure mutation state of local space and playing the role of vibration suppression of the bladed diffuser of the turbocharger.

Description

Vibration suppression structure of vane diffuser of turbocharger

Technical Field

The invention belongs to the technical field of electromechanics, and particularly relates to a vibration suppression structure of a vane diffuser of a turbocharger.

Background

The compressor of the marine diesel engine turbocharger generally adopts a diffuser with blades to improve the pressure ratio of the turbocharger and the efficiency of the compressor under the operating condition. However, under some working conditions, wake disturbance of airflow at the outlet of the compressor impeller strongly excites blades of the bladed diffuser, so that high-order component torsional modes of the blades are rapidly changed, and the total acceleration vibration level of the supercharger body exceeds the standard.

Disclosure of Invention

In view of the above, the invention aims to provide a vibration suppression structure for a vane diffuser of a turbocharger, so as to solve the problem that the acceleration total vibration level of a supercharger body exceeds the standard due to the fact that the vanes of the vane diffuser are strongly excited by wake disturbance of airflow at the outlet of an impeller of a compressor under certain working conditions of the conventional turbocharger.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a vibration suppression structure of a blade diffuser of a turbocharger comprises a compressor volute, a compressor impeller, diffuser blades, a bearing body, a controller, a vibration sensor and an electromagnetic valve;

the compressor volute is connected with the bearing body, a bearing is fixed in the bearing body, a shaft is fixed in an inner hole of the bearing, the shaft penetrates through a compressor impeller and is fixedly connected to the compressor impeller, and the compressor impeller is positioned on the inner side of the compressor volute;

the compressor volute is provided with an air collecting channel, a plurality of diffuser blades are arranged at the outlet of the compressor impeller between the compressor volute and the bearing body, and the diffuser blades are uniformly distributed on the circumference by taking a shaft as a center;

the bearing body is provided with at least one air supply channel, one end of the air supply channel is positioned on the wall surface of the air collecting channel, and the other end of the air supply channel is positioned on the wall surface between the outlet of the compressor impeller and the inlet of the diffuser blade;

the vibration sensor is fixed on the bearing body, and the vibration sensor and the electromagnetic valve are respectively connected with a controller through signals.

Further, the gas distribution channel includes at least one air intake hole, at least one exhaust hole, be equipped with the intercommunication between air intake hole and the exhaust hole get the perpendicular hole in air intake hole and exhaust hole, air intake hole one end is located the wall in air collection way, and the other end is linked together with erecting the hole and extends through the bearing body right side, gets and is equipped with in the right side of erecting the hole in the air intake and gets the hole stifled, exhaust hole one end is located the wall between compressor impeller export, the diffuser blade, and the other end is linked together with erecting the hole and extends through the bearing body right side, is equipped with the exhaust hole stifled in the right side of erecting the hole in the exhaust hole, erect the periphery that the hole outwards extended to the bearing body, erect downthehole in the top of getting the hole and be equipped with perpendicular.

Furthermore, the valve core of the electromagnetic valve is positioned in the vertical hole.

Further, the electromagnetic valve is a normally open type electromagnetic valve.

Furthermore, a round hole is formed in the center of the bearing body, a left bearing and a right bearing are fixed in the round hole, and the shaft penetrates through inner holes in the left bearing and the right bearing and is fixedly connected with the left bearing and the right bearing respectively.

Compared with the prior art, the invention has the following advantages:

the invention relates to a vibration suppression structure of a vane diffuser of a turbocharger, which is characterized in that a plurality of air taking holes are formed in a bearing body of the turbocharger, a vibration sensor and an electromagnetic valve are arranged, when the vibration of a turbocharger body is large, the electromagnetic valve is controlled by a controller, air of a compressor is introduced between an outlet of an impeller of the compressor and an inlet of a vane of the diffuser, local airflow vortex is eliminated, the pressure mutation state of a local space is reduced, and the vibration suppression effect of the vane diffuser of the turbocharger is achieved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic cross-sectional view of a vibration suppressing structure of a vane diffuser of a turbocharger according to an embodiment of the present invention.

Description of reference numerals:

1. a shaft; 2. a compressor volute; 3. an air compressor impeller; 4. diffuser vanes; 5. an air collecting channel; 6. air taking holes; 7. a valve core; 8. vertical holes; 9. plugging a vertical hole; 10. plugging a gas taking hole; 11. an exhaust hole; 12. an electromagnetic valve; 13. blocking an exhaust hole; 14. a left bearing; 15. a vibration sensor; 16. a bearing body; 17. a controller; 18. and a right bearing.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

A vibration suppression structure of a blade diffuser of a turbocharger is shown in figure 1 and comprises a compressor volute 2, a compressor impeller 3, diffuser blades 4, a bearing body 16, a controller 17, a vibration sensor 15 and an electromagnetic valve 12.

The compressor volute 2 is connected with the bearing body 16, a circular hole is formed in the center of the bearing body 16, a left bearing 14 and a right bearing 18 are fixed in the circular hole, a shaft 1 is fixedly connected in inner holes of the left bearing 14 and the right bearing 18, and the bearing body 16 is more stable in operation due to the arrangement of the left bearing 14 and the right bearing 18.

The shaft 1 penetrates through the compressor impeller 3 and is fixedly connected to the compressor impeller 3, and the compressor impeller 3 is positioned on the inner side of the compressor volute 2.

The compressor volute 2 is provided with an air collecting channel 5, a plurality of diffuser blades 4 are arranged between the compressor volute 2 and a bearing body 16 at the outlet of the compressor impeller 3, and the diffuser blades 4 are uniformly distributed on the circumference by taking the shaft 1 as the center.

The air distribution channel comprises at least one air taking hole 6 and at least one exhaust hole 11, and a vertical hole 8 for communicating the air taking hole 6 with the exhaust hole 11 is arranged between the air taking hole 6 and the exhaust hole 11. One end of the air taking hole 6 is positioned on the wall surface of the air collecting channel 5, the other end of the air taking hole is communicated with the vertical hole 8 and extends right to penetrate through the bearing body 16, and an air taking hole plug 10 is arranged on the right side of the vertical hole 8 in the air taking hole 6 and seals the right side of the air taking hole 6. One end of the exhaust hole 11 is positioned on the wall surface between the outlet of the compressor impeller 3 and the diffuser blade 4, the other end of the exhaust hole is communicated with the vertical hole 8 and extends rightwards to penetrate through the bearing body 16, and an exhaust hole plug 13 is arranged on the right side of the vertical hole 8 in the exhaust hole 11 and seals the right side of the exhaust hole 11. The vertical hole 8 extends outwards to the periphery of the bearing body 16, and a vertical hole plug 9 is arranged above the gas taking hole 6 in the vertical hole 8 and seals the upper part of the vertical hole 8.

The air taking hole 6 and the exhaust hole 11 horizontally penetrate through the bearing body 16, and processing and maintenance are facilitated. The air taking hole 6, the exhaust hole 11 and the vertical hole 8 form an air supplementing channel, one end of the air supplementing channel is located on the wall surface of the air collecting channel 5, and the other end of the air supplementing channel is located on the wall surface between the outlet of the compressor impeller 3 and the inlet of the diffuser blade 4, so that the communication of gaps between the air collecting channel 5 and the outlet of the compressor impeller 3 and the inlet of the diffuser blade 4 is realized. The bearing body 16 is provided with an electromagnetic valve 12 for opening and closing an air supplementing channel, and a valve core 7 of the electromagnetic valve 12 is positioned in the vertical hole 8; the electromagnetic valve 12 is a normally open electromagnetic valve 12, when the electromagnetic valve 12 is not electrified, the valve core 7 extends out, and the vertical hole 8 is not communicated; when the solenoid valve 12 is energized, the vertical holes 8 communicate when the spool 7 retracts.

The vibration sensor 15 is fixed on the bearing body 16, the vibration sensor 15 and the electromagnetic valve 12 are respectively in signal connection with a controller 17, and preferably, the controller 17 is a PLC controller.

The controller 17 can monitor the signal of the vibration sensor 15, when the controller 17 monitors that the signal value of the vibration sensor 15 is greater than a set value, the controller 17 controls the electromagnetic valve 12 to act, so that the valve core 7 retracts, the vertical holes 8 are communicated, and the air of the air collecting channel 5 passes through the air taking hole 6, the vertical holes 8 and the exhaust holes 11 to enter a channel between the outlet of the compressor impeller 3 and the inlet of the diffuser blades 4, so that local airflow vortex is eliminated, the pressure mutation state of a local space is reduced, and the vibration suppression effect of the vane diffuser of the turbocharger is achieved.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. The utility model provides a turbo charger has vane diffuser to restrain structure that shakes which characterized in that: the compressor volute comprises a compressor volute (2), a compressor impeller (3), diffuser blades (4), a bearing body (16), a controller (17), a vibration sensor (15) and an electromagnetic valve (12);

the compressor volute (2) is connected with the bearing body (16), a bearing is fixed in the bearing body (16), a shaft (1) is fixed in an inner hole of the bearing, the shaft (1) penetrates through the compressor impeller (3) and is fixedly connected to the compressor impeller (3), and the compressor impeller (3) is positioned on the inner side of the compressor volute (2);

the compressor volute (2) is provided with an air collecting channel (5), a plurality of diffuser blades (4) are arranged between the compressor volute (2) and a bearing body (16) at the outlet of the compressor impeller (3), and the plurality of diffuser blades (4) are uniformly distributed on the circumference by taking the shaft (1) as the center;

the bearing body (16) is provided with at least one air supply channel, one end of the air supply channel is positioned on the wall surface of the air collecting channel (5), and the other end of the air supply channel is positioned on the wall surface between the outlet of the compressor impeller (3) and the inlet of the diffuser blade (4);

the air supply device is characterized in that an electromagnetic valve (12) used for opening and closing the air supply channel is arranged on the bearing body (16), a valve core (7) of the electromagnetic valve (12) is located in the air supply channel, the vibration sensor (15) is fixed on the bearing body (16), and the vibration sensor (15) and the electromagnetic valve (12) are respectively in signal connection with the controller (17).

2. The vibration suppressing structure of a vane diffuser of a turbocharger according to claim 1, wherein: the air distribution channel comprises at least one air intake hole (6) and at least one exhaust hole (11), wherein a vertical hole (8) communicated with the air intake hole (6) and the exhaust hole (11) is arranged between the air intake hole (6) and the exhaust hole (11), one end of the air intake hole (6) is arranged on the wall surface of the air collecting channel (5), the other end of the air intake hole is communicated with the vertical hole (8) and extends rightwards to penetrate through the bearing body (16), an air intake hole plug (10) is arranged on the right side of the vertical hole (8) in the air intake hole (6), one end of the exhaust hole (11) is arranged on the wall surface between the outlet of the compressor impeller (3) and the diffuser blade (4), the other end of the air intake hole is communicated with the vertical hole (8) and extends rightwards to penetrate through the bearing body (16), an exhaust hole plug (13) is arranged on the right side of the vertical hole (8) in the exhaust hole (11), a vertical hole plug (9) is arranged above the air taking hole (6) in the vertical hole (8).

3. The vibration suppressing structure of a vane diffuser for a turbocharger according to claim 3, wherein: and the valve core (7) of the electromagnetic valve (12) is positioned in the vertical hole (8).

4. The vibration suppressing structure of a vane diffuser of a turbocharger according to claim 1, wherein: the electromagnetic valve (12) is a normally open electromagnetic valve (12).

5. The vibration suppressing structure of a vane diffuser of a turbocharger according to claim 1, wherein: a round hole is formed in the center of the bearing body (16), a left bearing (14) and a right bearing (18) are fixed in the round hole, and the shaft (1) penetrates through inner holes of the bearings (14) and the right bearing (18) and is fixedly connected with the bearings (14) and the right bearing (18) respectively.