KR20190135104A - Apparatus for supressing surge of turbo compressor - Google Patents

Abstract

According to the present invention, a turbo compressor surge prevention device comprises: a compressor housing having a compressor wheel, an air inlet protruding from a side facing the compressor wheel, a coupling portion protruding to surround the inlet, and a first hole formed in a side wall of the inlet; a connection module having one side connected to the inlet and the coupling portion and the other side having an entrance portion for receiving air, and having a second hole formed along the outer circumferential surface thereof to communicate with the first hole; a variable cone of elastic material, which is formed in a conical shape different in hollow sizes of one side and the other side to be provided inside the connection module, with one side having a relatively small cross-sectional area to communicate with the inlet of the compressor housing, and the other side fixed to the entrance portion of the connection module, wherein the hollow size of the one side is smaller than the inlet of the compressor housing and a plurality of third holes are formed on an outer circumferential surface thereof; and a spring member coupled to the outer circumferential surface of the variable cone to provide an elastic force, and operating to enlarge the cross-sectional size of one side of the variable cone.

Description

Turbo Compressor Surge Protector {APPARATUS FOR SUPRESSING SURGE OF TURBO COMPRESSOR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turbo compressor surge protection device that effectively improves surges occurring on the compressor side of a turbocharger.

In general, it is called supercharging to send air to the engine at a pressure higher than atmospheric pressure in the vehicle, and it is possible to charge a large amount of air even in an engine having the same displacement by the supercharging. Therefore, increasing the injection amount of fuel improves the engine output. You can.

A turbocharger for this purpose is to increase the engine output by supplying a large amount of air into the combustion chamber of the engine by using the velocity energy of the exhaust gas generated from the engine, where the large amount of air is sent to the combustion chamber by using the exhaust gas The exhaust gas rotates the turbine to operate the compressor, and the compressed air generated by the compressor is supplied to the engine cylinder to increase the amount of air supplied to the cylinder, thereby increasing the amount of fuel to increase the engine output. It is.

By the way, the conventional turbocharger can not control the flow rate after the compressor case of the compressor is manufactured, it is very limited in use in the surge area (high mountain region, etc.) is not air-charged. Therefore, it is necessary to develop a compressor wheel of various specifications in order to secure the surge margin of the highlands (alpine area), and when a surge occurs, there is a problem in that noise is severely generated and the compressor wheel is broken.

The matters described as the background art are only for the purpose of improving the understanding of the background of the present invention, and should not be taken as acknowledging that they correspond to the related art already known to those skilled in the art.

KR 10-1184465 B1

The present invention has been proposed to solve the above problems, and an object thereof is to provide a turbo compressor surge prevention device that effectively prevents air backflow that may occur while variably adjusting the air flow flowing into a compressor of a turbocharger. .

Turbo compressor surge prevention device according to the present invention for achieving the above object is provided with a compressor wheel therein, the inlet for the air is introduced into the side facing the compressor wheel is formed protruding, the coupling portion to surround the inlet A compressor housing which protrudes and has a first hole formed in the sidewall of the inlet; A connection module having one side connected to the inlet and the coupling part, an inlet part receiving air to the other side, and a second hole formed along an outer circumferential surface thereof to communicate with the first hole; Hollow parts of one side and the other side are formed in different conical shapes and are provided in the connection module, and one side of which the cross section is relatively small communicates with the inlet of the compressor housing, and the other side is fixed to the inlet of the connection module. A hollow portion of one side is formed smaller than the inlet of the compressor housing, and an outer circumferential surface of the variable cone of elastic material having a plurality of third holes; And a spring member coupled to the outer circumferential surface of the variable cone, the spring member operative to enlarge the size of the cross-sectional area of one side of the variable cone.

The connecting module has a cross-sectional area of one side and the other side is formed differently, one side of the relatively small cross-sectional area is connected to the inlet of the compressor housing, the outer member of the other side is rotatably fitted to the coupling portion, and one side The rotating member may be coupled to the other side of the rotating member to maintain a fixed state, and configured as a fixing member having an inlet portion formed at the other side.

The rotating member protrudes in the other direction from a portion where a cross-sectional area difference occurs between one side and the other side, and a locking portion is formed to catch one end of the spring member, and the other end of the spring member together with the variable cone of the fixing member. It is fixed to the inlet, the middle portion may be characterized in that coupled to the outer peripheral surface of the variable cone.

The engaging portion of the rotating member is formed by alternating protrusions protruding outwards at a predetermined distance, so that one end of the spring member is tensioned by being located at the protrusion according to the rotation of the rotating member, one side of the variable cone The hollow portion may be characterized in that the same as the inlet portion of the compressor housing.

The first hole guides the air inside the compressor housing to the chamber formed by the inlet, the coupling part, and the rotating member, and the second hole is formed at one outer circumferential surface of the rotating member to direct the air inside the chamber into the connection module. Inducing, and the third hole may be characterized in that the air inside the connection module to guide the air inside the variable cone to recycle the air.

When one end of the spring member is positioned and tensioned in the protrusion, the variable cone may be provided to be in close contact with one side hollow portion of the rotating member.

The second hole of the rotating member and the third hole of the variable cone may be formed so as not to be aligned with each other.

At one end of the rotating member is formed an inlet groove radially inwardly along the outer circumferential surface, the inlet portion is drawn radially outwardly along the inner circumferential surface, longer than the length of the inlet groove, the top of the inlet groove A seating groove is formed to be seated, the one side end of the variable cone protrudes radially along the outer circumferential surface, the rib sliding the space between the inlet groove and the seating groove according to the size change of the cross-sectional area of the variable cone; It can be characterized.

According to the turbo compressor surge prevention device having the structure as described above, by varying the compressor inlet area of the turbocharger, it is possible to prevent the occurrence of a surge phenomenon and to secure a surge margin through the flow rate control flowing into the compressor, The merchandise of the turbocharger can be improved.

In addition, even when a backflow phenomenon occurs when the inlet area of the compressor is narrowed, it is possible to prevent a phenomenon in which turbocharger efficiency is impaired by recovering and recirculating backflowing air.

1 is a cross-sectional view showing a side shape when the turbo compressor surge protection device according to an embodiment of the present invention,
Figure 2 is a perspective view showing the operation of the spring member when the turbo compressor surge protection device according to an embodiment of the present invention,
3 is a view showing a rotating member according to an embodiment of the present invention,
4 is a view showing a variable cone according to an embodiment of the present invention;
Figure 5 is a cross-sectional view showing a side shape when the turbo compressor surge protector according to an embodiment of the present invention in an inactive state,
6 is a perspective view showing the operation of the spring member when the turbo compressor surge protector according to an embodiment of the present invention is in an inoperative state.

Hereinafter, a turbo compressor surge protection device according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

1 is a cross-sectional view showing a side shape when the turbo compressor surge protection device according to an embodiment of the present invention, Figure 2 is a turbo compressor surge protection device according to an embodiment of the present invention when Figure 3 is a perspective view showing the operation of the spring member, Figure 3 is a view showing a rotating member according to an embodiment of the present invention, Figure 4 is a view showing a variable cone according to an embodiment of the present invention, Figure 5 FIG. 6 is a cross-sectional view illustrating a side shape when the turbo compressor surge protection device according to an embodiment of the present invention is in an inoperative state, and FIG. 6 is a turbo compressor surge protection device according to an embodiment of the present invention in an inoperative state. It is a perspective view showing the operation of the spring member at the time.

1 to 2, the turbo compressor surge improving device of the present invention includes a compressor wheel 10 therein, and an inlet portion 21 into which air is introduced to a side facing the compressor wheel 10. A compressor housing 20 protruding from the coupling part 22 so as to surround the inlet part 21, and having a first hole 23 formed in a sidewall of the inlet part 21; One side is connected to communicate with the inlet portion 21 and the coupling portion 22, the inlet portion 49 for supplying air to the other side is formed, the second hole 42 is formed along the outer circumferential surface first hole A connection module 40 in communication with 23; A variable cone 30 of an elastic material provided inside the connection module 40 and having a conical shape having different cross-sectional sizes of one side and the other side, and having a plurality of third holes 33 formed on an outer circumferential surface thereof; And a spring member 35 coupled to provide an elastic force to an outer circumferential surface of the variable cone 30 to operate to enlarge the size of the cross-sectional area of one side of the variable cone 30.

The compressor wheel 10 rotates to compress the air introduced through the inlet 21 of the compressor housing 20, thereby discharging the compressed air to the intake manifold of the engine to increase the intake efficiency of the engine.

On the other hand, the compressor housing 20 forms an inlet portion 21 protruding on the side facing the compressor wheel 10 to supply outside air to the compressor wheel 10 to supply air to the compressor wheel 10. Supply.

In the present invention, the variable cone 30 has one side of which the cross section is relatively small communicates with the inlet portion 21 of the compressor housing 20, and the other side is fixed to the inlet portion 49 of the connection module 40. The size of one side cross-sectional area is smaller than the inlet portion 21 of the compressor housing 20.

That is, since the size of the cross-sectional area of one side of the variable cone 30 is smaller than the size of the inlet portion 21 of the compressor housing 20 in communication with each other, the amount of intake air is reduced by reducing the area of the air passage supplied to the inlet portion 21 side. Can be reduced. Accordingly, the flow rate delivered to the compressor wheel 10 can be adjusted, so that the compressor can be effectively used even in a surge region where air is not supercharged.

On the other hand, to vary the size of one side of the variable cone 30 in the present invention, a spring member 35 is used. The operation of the spring member 35 will be described later.

Here, a step may be generated at one side of the variable cone 30 and the inlet part 21 side of the compressor housing 20 to generate a backflow phenomenon.

Accordingly, as shown in FIG. 1, the first hole 23 is formed on the sidewall of the inlet part 21 of the compressor housing 20 where the backflow phenomenon occurs, and the second hole 42 is formed on the outer circumferential surface of the connection module 40. ), And by forming a plurality of third holes 33 on the outer circumferential surface of the variable cone 30, the air flowed back in the compressor housing 20 may be first, second, third holes 23, 42, 33. Through the recirculation to the inlet 21 to prevent the flow loss due to the backflow phenomenon.

The compressor housing 20 is provided so that the coupling part 27 coupled to communicate with the connection module 40 has a larger cross-sectional area than the inlet part 21 in addition to the inlet part 21. Therefore, the coupling force between the compressor housing 20 and the connection module 40 can be increased.

On the other hand, in the present invention, the connection module 40, the cross-sectional area of one side and the other side is formed different, one side is relatively small cross-section is connected to the inlet 21 of the compressor housing 20, the outer peripheral surface of the other side It is fitted to the coupling portion 22, the rotating member 41 provided to be relatively rotatable, and provided to maintain a fixed state, the other side of the rotating member 41 is coupled to one side so as to be relatively rotatable, the other side It may be composed of a fixing member 47 in which the inlet portion 49 is formed.

As shown in FIG. 3, the rotating member 41 is provided in a shape in which cylinders having different cross-sectional areas are connected to each other. As shown in FIG. 1, one side of the rotating member 41 has a relatively small cross-sectional area at the inlet portion 21 of the compressor housing 20. The other side, which is connected and has a relatively large cross-sectional area, is provided to be fitted to the inner peripheral surface of the coupling part 22.

At this time, although not shown, the rotary member 41 is provided to be connected to each other through a separate connection device such as the compressor housing 20 and the bearing, or to be fitted with a slight tolerance, so as to be relative to the compressor housing 20. It may be provided to be rotatable. Here, the rotation member 41 is controlled to rotate by the actuator connected separately.

On the other hand, the fixing member 47 serves to fix the variable cone (30). At this time, the fixing member 47 may be provided to be coupled to each other via a bearing, or to communicate with each other by a tolerance in order not to receive the rotational force from the rotating member 41.

In the present invention, the rotating member 41 is formed with a catching portion 43 for engaging one end of the spring member 35, the other end of the spring member 35 together with the variable cone 30 It is fixed to the inlet portion 49 of the fixing member 47, the middle portion may be coupled to the outer peripheral surface of the variable cone (30).

Specifically, the locking portion 43 is formed to protrude in the other direction from the portion where the cross-sectional area difference between one side and the other side of the rotating member 41 occurs.

Here, the engaging portion 43 of the rotating member 41 is formed with a projection projecting in the radial direction, so that one end of the spring member 35 in accordance with the rotation of the rotating member 41 is projecting portion 45 When positioned in tension), the cross-sectional area of one side of the variable cone 30 is provided to be the same as the cross-sectional area of the inlet 21 of the compressor housing 20.

The protrusions 45 may be provided in plural, and may be provided to protrude in a state spaced apart by a predetermined distance along the locking portion 43.

That is, as shown in FIG. 2, the elastic spring 35 that provides an elastic force to vary the shape of the variable cone 30 is caught by the engaging portion 43 formed at the rotating member 40, and the other end is fixed. It is fixed to the member 47.

Here, if the rotating member 40 is rotated so that one end of the elastic spring 35 is caught in a portion where the protrusion 45 is not formed, the elastic spring 35 is in the original state as shown in FIG. While compressed to maintain the original shape of the cross-sectional area of one side of the variable cone 30 is smaller than the cross-sectional area of the inlet (21). This increases the compressor surge margin.

On the other hand, as shown in FIG. 6, when the rotating member 40 is rotated so that one end of the elastic spring 35 is caught by the protruding portion 45 protruding, the elastic spring 35 is variable as shown in FIG. 2. One side of the cone 30 is expanded so that the cross-sectional area is equal to the cross-sectional area of the inlet 21 of the compressor housing 20. Therefore, the amount of air supplied to the inlet port 21 of the compressor housing 20 can be increased.

1 and 4, the first hole 23 is a chamber in which air in the compressor housing 20 is formed by the inlet part 21, the coupling part 22, and the rotating member 41. The second hole 42 is formed on one outer circumferential surface of the rotating member 41 to guide the air in the chamber 25 into the connection module 40, and the third hole 42. 33) may be formed to guide the air inside the connection module 40 into the variable cone 30 to recycle the air.

That is, the air flowing back by the step inside the compressor housing 20 is introduced into the chamber 25 through the first hole 23, and the air introduced into the chamber 25 opens the second hole 42. Through the flow into the connection module 40, the air introduced into the connection module 40 is introduced into the hollow portion of the variable cone 30 again through the third hole (33).

Therefore, the air flowed back from the inlet portion 21 of the compressor housing 20 can be recycled back to the inlet portion 21, thereby preventing the flow loss or the specific noise caused by the backflow phenomenon. .

Here, when one end of the spring member 35 is tensioned by being located in the protrusion 35, the variable cone 30 may be provided to be in close contact with one side hollow portion of the rotating member 41.

In addition, the second hole 42 of the rotating member 41 and the third hole 33 of the variable cone 30 may be formed so as not to be aligned with each other.

That is, when the rotating member 41 is operated such that the spring member 35 is tensioned as shown in FIG. 5, the third hole 33 formed in the variable cone 30 and the second hole 42 formed in the rotating member 41 are provided. ) Is not aligned, the variable cone 30 and the rotary member 41 is provided to be in close contact with each other, it is possible to prevent the air flow is recycled unnecessarily in the situation that the backflow does not occur to prevent the flow efficiency is impaired have.

Additionally, referring to FIGS. 1, 4, and 5, at one end of the rotating member 41, an inlet groove 41a drawn radially inwardly along an outer circumferential surface is formed, and the inlet portion 21 is formed. At the end of the inlet radially outwards along the inner circumferential surface, longer than the length of the inlet groove (41a), a seating groove (21a) is formed in the upper portion of the inlet groove (41a) is formed, of the variable cone (30) One side end may protrude radially along the outer circumferential surface, the rib 32 for sliding the space between the inlet groove 41a and the seating groove 21a in accordance with the size of the cross-sectional area of the variable cone 30 can be formed. have.

That is, the variable cone 30 is elastically changed in shape according to the operation of the spring member 35, so that the rib 32 is guided while sliding the space between the inlet groove 41a and the seating groove 21a. By being provided, the variable cone 30 can prevent the phenomenon of leaving the existing position in the shape change process.

In particular, even in a situation where the variable cone 30 is maintained in its original state, the rib 32 may be provided to be seated in the space between the inlet groove 41a and the seating groove 21a.

According to the turbo compressor surge prevention device having the structure as described above, by controlling the area of the compressor inlet of the turbocharger, the surge phenomenon can be prevented and the surge margin can be secured through the flow rate control flowing into the compressor. The merchandise of the turbocharger can be improved.

In addition, even when a backflow phenomenon occurs when the inlet area of the compressor is narrowed, it is possible to prevent a phenomenon in which turbocharger efficiency is impaired by recovering and recirculating backflowing air.

While the invention has been shown and described with respect to particular embodiments, it will be appreciated that various changes and modifications can be made in the art without departing from the spirit of the invention provided by the following claims. It will be self-evident for those of ordinary knowledge.

10: compressor wheel 20: compressor housing
21: Inlet 21a: Seating groove
22: coupling portion 23: the first hole
25: chamber 30: variable cone
32: rib 33: third hole
35: spring member 40: connection module
41: rotating member 41a: drawing groove
42: second hole 43: locking portion
45: protrusion 47: fixing member
49: entrance

Claims (9)

A compressor housing having a compressor wheel therein, an inflow portion through which air is introduced to the side facing the compressor wheel, a coupling portion protruding to surround the inflow portion, and a first hole formed in the sidewall of the inflow portion;
A connection module having one side connected to communicate with the inflow portion and the coupling portion, an inlet portion for supplying air to the other side, and a second hole formed along an outer circumferential surface thereof so as to communicate with the first hole;
A variable cone of elastic material which is provided inside the connection module and is formed in a cone shape having cross-sectional sizes of one side and the other side different from each other, and has a plurality of third holes formed on an outer circumferential surface thereof; And
And a spring member coupled to the outer circumferential surface of the variable cone, the spring member operative to enlarge the size of the cross-sectional area of one side of the variable cone. The method according to claim 1,
One side of the variable cone has a relatively small cross-section communicating with the inlet of the compressor housing, the other side is fixed to the inlet of the connection module, characterized in that the size of one cross-sectional area is smaller than the inlet of the compressor housing. Turbo compressor surge protector. The method according to claim 2,
The connection module,
One side and the other side of the cross-sectional area is formed to be different, one side of the relatively small cross-sectional area is connected to the inlet of the compressor housing, the outer member of the other side is inserted into the coupling part to be relatively rotatable,
It is provided to maintain a fixed state, the other side of the rotary member is coupled to the rotatable rotatable, the turbo compressor surge suppressor, characterized in that consisting of a fixing member formed inlet on the other side. The method according to claim 3,
The rotating member is provided with a locking portion for engaging one end of the spring member,
The other end of the spring member is fixed to the inlet of the fixing member with the variable cone, the turbo compressor surge suppressor, characterized in that the middle portion is coupled to the outer peripheral surface of the variable cone. The method according to claim 4,
The engaging portion of the rotating member is formed with a protrusion projecting in the radial direction, when one end of the spring member is located in the protrusion portion and is tensioned according to the rotation of the rotating member, the cross-sectional area of one side of the variable cone, the inlet of the compressor housing Turbo compressor surge protection device characterized in that the same as the cross-sectional area. The method according to claim 5,
The first hole guides the air inside the compressor housing to the chamber formed by the inlet, the coupling and the rotating member,
The second hole is formed on one outer peripheral surface of the rotating member to guide the air in the chamber into the connection module,
The third hole is a turbo compressor surge prevention device, characterized in that to guide the air in the connection module inside the variable cone to recirculate the air. The method according to claim 6,
When one end of the spring member is located in the protruding portion and is tensioned, the variable cone is a turbo compressor surge prevention device, characterized in that provided in close contact with the one hollow portion of the rotating member. The method according to claim 6,
And a second hole of the rotating member and a third hole of the variable cone are not aligned with each other. The method according to claim 2,
At one end of the rotating member is formed an inlet groove drawn in radially inward along the outer circumferential surface,
At the end of the inlet portion is introduced radially outward along the inner circumferential surface, longer than the length of the inlet groove, a seating groove is formed to be seated on the top of the inlet groove,
One side of the variable cone protrudes in a radial direction along the outer circumferential surface, according to the size change of the cross-sectional area of the variable cone rib sliding sliding space between the inlet groove and the seating groove; .

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