WO2011118880A1

WO2011118880A1 - Variable nozzle device of turbocharger

Info

Publication number: WO2011118880A1
Application number: PCT/KR2010/003225
Authority: WO
Inventors: 권성; 안재원; 노태현
Original assignee: (주)계양정밀
Priority date: 2010-03-26
Filing date: 2010-05-24
Publication date: 2011-09-29
Also published as: KR101174438B1; KR20110108206A

Abstract

Disclosed is a variable nozzle device of a turbocharger for simplifying a driving mechanism while preventing deviation of a drive ring and improving assembling performance or workability. The present invention includes: a nozzle ring rotatively supporting a plurality of rotation shafts, which are connected to vanes guiding exhaust gas introduced towards a turbine side; lever plates, each of which one side is connected to the rotation shafts so as to rotate the rotation shafts; a drive ring mounted in contact with the nozzle ring at one sides surface thereof so as to be rotatable, connected to the other side of each of the lever plates for rotating the lever plates, and formed with a through hole, which is depressed in a predetermined depth in the inside surface thereof; and a holding member protruded from the nozzle ring to penetrate the through hole so as to support the other sides surface of the drive ring. The drive ring is rotated in the state that the drive ring is in close contact with the nozzle ring so that the holding member penetrates the through hole. Therefore, the other sides surface of the drive ring may be supported by the holding member.

Description

Variable nozzle unit of turbocharger

The variable nozzle device of the turbocharger of the present invention, and more particularly, to prevent the drive ring from being separated by a locking member integrally formed in the nozzle ring, and to install the driving ring in the nozzle ring formed with the locking member. It relates to a variable nozzle device of a turbocharger to improve the assemblability by forming a through-hole in the drive ring as possible.

A turbocharger is a device that rotates a turbine by using the energy of exhaust gas and pressurizes air by a compressor connected to the turbine. The turbocharger supplies pressurized air to the combustion chamber of the engine to increase the filling efficiency of the engine to increase the output. Do it.

The turbocharger changes the energy that can be provided by the exhaust gas according to the operating state of the engine. Therefore, the turbine nozzle is varied so that the exhaust gas is applied to the turbine in order to adjust the amount appropriately according to the operating state of the engine to operate the engine more efficiently. It allows you to control the energy you provide. As a method of varying the turbine nozzle, a method of controlling the flow direction of the exhaust gas supplied to the turbine by rotating a plurality of vanes provided in the flow path through which the exhaust gas is supplied to the turbine is mainly used.

As shown in FIGS. 1 and 2, the variable nozzle device of the conventional turbocharger is rotatably installed in the nozzle ring 10 fixed to the housing 1 and supplied to the turbine 2. It is composed of a structure having a plurality of vanes (3) for controlling the flow rate of the gas. In addition, the drive ring 20 is formed concentrically with the nozzle ring 10 and is rotatably installed in the nozzle ring 10, and is integrally connected to the rotation shaft 30 of the vane 3 and the drive ring 20 is connected to the drive ring 20. It consists of a lever plate 40 extending toward.

The nozzle ring 10 has a ring shape in which a through hole 11 is formed at a central portion thereof, and a plurality of rotation shafts 30 are rotatably mounted. One end of the rotating shaft 30 is equipped with a vane 3 to adjust the amount of exhaust gas guided to the turbine (2). The lever plate 40 is fixed to the other end of the rotation shaft 30.

An end of the lever plate 40 extending toward the driving ring 20 is fitted between the driving protrusions 21 protruding from one side of the driving ring 20. The driving ring 20 is connected to an actuator which is externally mounted to generate the power necessary to rotate the vane 3.

A plurality of mount pins 50 are mounted on the nozzle ring 10 to prevent separation of the drive ring 20 rotatably mounted on one side of the nozzle ring 10. Mounting pin 50 has a locking step 51 having an extended cross section to prevent the drive ring 20 is separated in the axial direction in the middle portion.

If the vane 3 is rotated more than a certain angle while the variable nozzle device of the turbocharger configured as described above is operated, there is a risk of contact with the turbine 2, so to prevent the rotation angle of the vane 3 to be limited. There is a need. In order to limit the angle of rotation of the vane 3, a locking projection 31 protruding by a predetermined height is formed at one end of the lever plate 40. The locking protrusion 31 protrudes to a height capable of contacting the housing 1 portion fitted in the through hole 11 in a state where the vanes 3 are rotated as far as possible so as not to contact the turbine 2. The rotation angle of the vane 3 and the rotation angle of the driving ring 20 are limited by the rotation angle of the lever plate 40 by the locking protrusion 31.

In addition, at least one stopper 12 is mounted to the nozzle ring 10. The stopper 12 protrudes to a predetermined height so that the vane 3 is in contact with the lever plate 40 in a state in which it is rotated as far as possible so as not to contact the turbine 2 so that the lever plate 40 can no longer be rotated. It acts as a restraint. The lever plate 40 should have sufficient thickness and rigidity to be in contact with the stopper 12 and to withstand collisions.

Since the variable nozzle device of the turbocharger having the conventional structure as described above should be equipped with a separate mount pin 50 to prevent the drive ring 20 from being separated, the work time is increased during assembly and the manufacturing cost is increased due to an increase in parts. There is a problem that is increased. In addition, there is a risk that an accident occurs because the mount pin 50 is separated while undergoing heat deformation for a long time.

SUMMARY OF THE INVENTION An object of the present invention devised in view of the above is to provide a variable nozzle device of a turbocharger which can improve assembly and operability while simply configuring a driving mechanism that can prevent the departure of a driving ring. have.

Still another object of the present invention is to provide a turbocharger variable nozzle device capable of simplifying the structure of the drive ring by forming a driving groove into which the end of the lever plate is inserted in the inner surface of the drive ring.

Still another object of the present invention is to provide a variable nozzle apparatus of a turbocharger, in which an inner surface of the driving ring is rotated in contact with a locking member, thereby reducing friction and improving operability.

The variable nozzle device of a turbocharger for achieving the object of the present invention as described above comprises a nozzle ring for rotatably supporting a plurality of rotating shafts connected to vanes for guiding the exhaust gas flowing into the turbine side; A lever plate having one side connected to the pivot shaft to pivot the pivot shaft; A driving ring rotatably mounted in contact with one side of the nozzle ring, and connected to the other side of the lever plate to rotate the lever plate, and having a through hole recessed to a predetermined depth on an inner side thereof; And a locking member protruding from the nozzle ring to penetrate the through hole to support the other side of the driving ring, wherein the locking member is in close contact with the nozzle ring so that the locking member penetrates the through hole. In, the other side of the drive ring is supported by the locking member by rotating the drive ring.

In addition, more preferably, the locking member is formed of a horizontal projection protruding radially so as to contact the other side of the drive ring.

In addition, more preferably, the locking member is formed of a vertical protrusion protruding to contact the inner surface of the drive ring and the horizontal projection is formed at the end thereof.

The locking member includes a vertical protrusion protruding to contact the inner surface of the driving ring and a horizontal protrusion protruding to contact the other side of the driving ring at the end of the vertical protrusion.

Further, more preferably, the plurality of vertical protrusions protrude from the nozzle ring, and the horizontal protrusions are formed on at least two vertical protrusions of the plurality of vertical protrusions.

Further, more preferably, the vertical protrusions are formed in three places.

In addition, more preferably, the horizontal projection is formed at a predetermined interval to limit the rotational trajectory of the lever plate, the stop surface is provided with a contact surface in the state in which the lever plate is rotated as possible.

In addition, more preferably, the stop surface has a shape corresponding to the side shape of the lever plate which is in contact with a predetermined section so as to be in surface contact with the lever plate.

In addition, more preferably, the nozzle ring has a contact surface in which the lever plate is in contact with the contact surface in which the drive ring is in contact with the same height.

In addition, more preferably, the driving ring is formed with a driving groove having a shape penetrating both sides of the driving ring and recessed to a predetermined depth on the inner side so that the other side of the lever plate can be inserted.

In addition, more preferably, the lever plate has a symmetrical shape with respect to the center line.

As described above, the variable nozzle device of the turbocharger according to the present invention has a structure in which the drive ring is prevented from being separated by a catching member integral with the nozzle ring, and thus the assembly mechanism and the operability are improved while the driving mechanism is simply configured. There is.

In addition, since the inner surface of the driving ring is rotated in contact with the locking member, frictional force is reduced, thereby improving operability.

In addition, the contact surface contacting the lever plate and the contact surface contacting the driving ring have the same height, and the thickness of the nozzle ring can be made thinner as the latching portion protrudes, and the length of the rotation shaft as the thickness of the nozzle ring is reduced. Since the weight is reduced by reducing the operation performance due to the weight reduction is improved.

1 is a cross-sectional view showing a cross section of a conventional turbocharger;

2 is a plan view illustrating a variable nozzle device of the turbocharger shown in FIG. 1;

3 is a perspective view showing a variable nozzle device of a turbocharger according to an embodiment of the present invention;

4 is a plan view showing a variable nozzle device of the turbocharger shown in FIG.

5 is a cross-sectional view taken along line “A-A” of FIG. 4;

FIG. 6 is a cross-sectional view of a portion “B-B” of FIG. 4;

7 is a state diagram showing a state before the lever plate is rotated,

8 is a state diagram showing a state in which the lever plate is rotated,

9 is a plan view showing a state in which the drive ring is fitted to the nozzle ring,

10 is a plan view illustrating a state in which the driving ring is supported by the locking member by rotating the driving ring by a predetermined angle in a state of being fitted into the nozzle ring.

Hereinafter, a variable nozzle device of a turbocharger according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are given to the same parts as in the conventional structure, and a detailed description thereof will be given with reference to FIG. 1. Quote.

3 is a perspective view illustrating a variable nozzle device of a turbocharger according to an exemplary embodiment of the present invention, FIG. 4 is a plan view illustrating the variable nozzle device of the turbocharger shown in FIG. 3, and FIG. "Is a cross-sectional view showing a cross section, Figure 6 is a cross-sectional view showing a" BB "portion of Figure 4, Figure 7 is a state diagram showing the state before the lever plate is rotated, Figure 8 is a lever plate 9 is a plan view illustrating a state in which a driving ring is fitted to a nozzle ring, and FIG. 10 is a view showing a state in which a driving ring is fitted to a nozzle ring. As a plan view showing this supported state, the variable nozzle device of the turbocharger, which is a preferred embodiment of the present invention as shown, is rotatably installed in the nozzle ring 110 fixed to the housing 1, respectively. Is constituted by a structure having a plurality of vanes (3) for adjusting the flow rate of the exhaust gas to be supplied with a blank (2). It is also connected to the drive ring 120 and the drive ring 120, which is concentric with the nozzle ring 110 and rotatably installed on the nozzle ring 110, and the rotation shaft 30 of the vane 3, It consists of an extended lever plate 140.

The nozzle ring 110 has a ring shape in which a through hole 111 is formed in a central portion thereof, and a plurality of rotation shafts 30 are rotatably mounted. The vane 3 is mounted at one end of the rotation shaft 30, and the lever plate 140 is fixed at the other end.

The lever plate 140 includes a connection part 141 into which the pivot shaft 30 is inserted and connected, and an extension part 142 extending from the connection part 141 toward the driving ring 120. The lever plate 140 has a left-right symmetrical shape with respect to the center line, so that the assembly time can be shortened because it has no directionality during assembly.

An end portion of the extension part 142 of the lever plate 140 extending toward the driving ring 120 is fitted into the driving groove 121 formed on the inner surface of the driving ring 120. The driving groove 121 penetrates both side surfaces of the driving ring 120 and has a shape recessed by a predetermined depth on the inner surface. On the outer circumferential surface side of the driving ring 120, a connection hole 122 is formed to be connected to an actuator that is externally mounted and generates an electric power required to rotate the vane 3.

The nozzle ring 110 is formed with a locking member 112 protruding to a predetermined height to support the other side of the driving ring 120. The locking member 112 includes a vertical protrusion 113 protruding to contact the inner surface of the driving ring 120 and a horizontal protrusion protruding radially to contact the other side of the driving ring 120 at the end of the vertical protrusion 113. It consists of a protrusion 114. A plurality of vertical protrusions 113 are formed with a predetermined interval to contact the inner surface of the driving ring 120, the horizontal protrusions 114 are formed only on at least two vertical protrusions 113 of the plurality of vertical protrusions 113. It is made of a structure. As shown, it is preferable that the horizontal protrusions 114 are formed on the three vertical protrusions 113 having a predetermined interval. The vertical protrusions 113 are formed at a predetermined interval to limit the rotational trajectory of the lever plate 140. That is, the stop plate 113a is provided to be in contact with the lever plate 140 in the maximum rotation. The stop surface 113a has a shape corresponding to the lateral shape of the extension part 142 of the lever plate 140 to be in surface contact with a predetermined section of the extension part 142 of the lever plate 140. The shape of the stop surface 113a is not limited to a structure that is in surface contact with the shape corresponding to the side shape of the lever plate 140 and the extension part 142, and has a shape different from the side shape of the extension part 142. It may be configured as a structure in contact.

The inner surface of the drive ring 120 is formed with a through hole 123 recessed to a predetermined depth so that the horizontal protrusion 114 of the locking member 112 passes. The through hole 123 is formed to mate with the horizontal protrusion 114 of the locking member 112.

In addition, the contact surface 110a in contact with the lever plate 140 in the nozzle ring 110 and the contact surface 110b in contact with the drive ring 120 form the same height. Therefore, the lever plate 140 forming a straight line is mounted to be seated on the contact surface 110a of the nozzle ring 110, and thus may be directly inserted into the driving groove 121 of the driving ring 120.

The variable nozzle device of the turbocharger according to the preferred embodiment of the present invention configured as described above operates the actuator to rotate in the direction in which the vanes 3 are closed as shown in FIG. 7, so that the driving ring 120 rotates as much as possible in one direction. When the extension portion 142 of the lever plate 140 is in contact with the stop surface 113a of one side is stopped so that the driving ring 120 is no longer rotated. That is, the rotation angle of the driving ring 120 in one direction (the vane opening direction) is limited.

On the contrary, as shown in FIG. 8, when the driving ring 120 rotates as far as possible in the other direction by operating the actuator so that the vane rotates in the open direction as much as possible, the extension part 142 of the lever plate 140 stops on the other side ( Contacting 113a) stops the drive ring 120 from rotating further. That is, the rotation angle of the driving ring 120 in the other direction (the vane closing direction) is limited.

As described above, since the rotational trajectory of the lever plate 140 is formed between the stop surfaces 113a at both sides, the opening and closing angles of the vanes 3 can be limited.

The process of mounting the drive ring 120 on the nozzle ring 110 is as follows.

In the case where the driving ring 120 is to be mounted on the nozzle ring 110, first, as shown in FIG. 9, the horizontal protrusion 114 of the locking member 112 formed on the nozzle ring 110 is attached to the driving ring 120. The driving ring 120 is in close contact with the nozzle ring 110 while the driving ring 120 is positioned to pass through the formed through hole 123. As shown in FIG. 10, the horizontal protrusion 114 passes through the through hole 123 and is positioned higher than the thickness of the driving ring 120, thereby rotating the driving ring 120 by a predetermined angle. The horizontal protrusions 114 of 112 support the other side of the driving ring 120. That is, when the driving ring 120 is rotated by a predetermined angle, as shown in FIG. 5, the horizontal protrusion 114 of the locking member 114 supports the other side of the driving ring 120, thereby driving the shaft 120. It is to prevent the deviation from the direction.

As described above, in the variable nozzle device of the turbocharger according to the present invention, the other side of the driving ring 120 is supported by the horizontal protrusion 114 of the locking member 112 formed integrally with the nozzle ring 110 to drive the drive ring 120. ) Structure, which prevents the deviating from each other, improves the assembly and operability while the driving mechanism is simply configured.

In addition, since the inner surface of the driving ring 120 is rotated in contact with the vertical protrusion 113 of the locking member 112, the frictional force is reduced to improve operability.

In addition, the contact surface 110a in contact with the lever plate 140 and the contact surface 110b in contact with the driving ring 120 have the same height, and are formed in the driving groove 121 formed on the inner surface of the driving ring 120. Since the lever plate 140 is formed to be inserted immediately, the thickness of the nozzle ring 110 can be made thinner by the height of the locking member 112, and the rotation shaft is reduced as the thickness of the nozzle ring 110 is reduced. By reducing the length of the 30 can achieve a weight reduction. In addition, since it is possible to reduce the installation space in which the variable nozzle device of the turbocharger is installed, the turbocharger can be miniaturized.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Claims

A nozzle ring rotatably supporting a plurality of rotating shafts connected with vanes for guiding exhaust gas flowing into the turbine side;

A lever plate having one side connected to the pivot shaft to pivot the pivot shaft;

A driving ring rotatably mounted in contact with one side of the nozzle ring, and connected to the other side of the lever plate to rotate the lever plate, and having a through hole recessed to a predetermined depth on an inner side thereof; And

A locking member protruding from the nozzle ring to penetrate the through hole and supporting the other side of the drive ring; Including,

In the state in which the driving ring is in close contact with the nozzle ring so that the locking member penetrates the through hole, the other side of the driving ring is supported by the locking member by rotating the driving ring. Nozzle unit.
The method of claim 1, wherein the locking member

Turbocharger variable nozzle device characterized in that consisting of a horizontal projection protruding radially so as to contact the other side of the drive ring.
The method of claim 2, wherein the locking member

The variable nozzle device of the turbocharger, characterized in that it comprises a vertical projection protruding to contact the inner surface of the drive ring and the horizontal projection is formed at the end thereof.
3. The variable nozzle apparatus of claim 2, wherein the plurality of vertical protrusions protrude from the nozzle ring, and the horizontal protrusions are formed on at least two vertical protrusions among the plurality of vertical protrusions.
The variable nozzle device of a turbocharger according to claim 4, wherein the vertical protrusion is formed at three locations.
The method of claim 2, wherein the horizontal projections

It is formed at a predetermined interval to limit the rotational trajectory of the lever plate, the variable nozzle device of the turbocharger, characterized in that the stop surface is provided in contact with the lever plate is rotated as possible.
The method of claim 6, wherein the stop surface is

The variable nozzle device of a turbocharger comprising a shape corresponding to a side shape of the lever plate which is in contact with a predetermined section so as to be in surface contact with the lever plate.
8. The nozzle ring of claim 1 or 7, wherein the nozzle ring is

And a contact surface in which the lever plate is in contact with the contact surface in which the driving ring is in contact with the same.
10. The turbo engine as claimed in claim 8, wherein the driving ring has a driving groove formed in a shape penetrating both sides of the driving ring and recessed to a predetermined depth on the inner side so that the other side of the lever plate can be inserted. Chargeable variable nozzle unit.
The variable nozzle device of a turbocharger according to claim 8, wherein the lever plate has a symmetrical shape with respect to the center line.