CN216788535U

CN216788535U - Turbocharging variable-section nozzle ring of gasoline engine

Info

Publication number: CN216788535U
Application number: CN202123103036.7U
Authority: CN
Inventors: 黄勇锋; 董忠荣; 杜俊律; 叶军; 文刚
Original assignee: PINGXIANG DEBO TECHNOLOGY DEVELOPMENT CO LTD
Current assignee: PINGXIANG DEBO TECHNOLOGY DEVELOPMENT CO LTD
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-06-21
Anticipated expiration: 2031-12-07

Abstract

The utility model provides a gasoline engine turbocharging variable cross section nozzle cascade belongs to automobile engine booster technical field, including blade, mounting disc, shift fork, dial the dish, the blade passes through the blade pole and connects the mounting disc, and blade and shift fork are connected respectively at blade pole both ends, dial the dish and be used for controlling the shift fork angle to the adjustment blade angle, dial the dish and include annular piece and protruding structure, protruding structure sets up on the annular piece for axial positioning and/or radial positioning. The protruding structure can play the strengthening rib effect, makes dial non-deformable, can play the positioning action again to the dial of stirring to reduced the area of contact of stirring dish and mounting disc, frictional force is little, and the friction loss is little.

Description

Turbocharging variable-section nozzle ring of gasoline engine

Technical Field

The utility model relates to an automobile engine booster technical field, concretely relates to variable cross-section nozzle cascade of gasoline engine turbocharging.

Background

At present, a variable cross-section nozzle ring for turbocharging is generally provided with a circular mounting disc and a circular rear cover, a group of fixed-distance supporting elements are arranged between the two discs to enable the two discs to keep a certain distance and to be parallel as far as possible, a group of blades are arranged between the discs, blade connecting blade rods are arranged at the end parts of the blade rods, one ends of the shifting forks are connected with the blade rods, the other ends of the shifting forks are in equal-gap fit with holes or grooves on the circular shifting disc, when the shifting disc is shifted in the circumferential direction, the shifting forks and the blades are driven to rotate by an angle, included angles between adjacent blades are changed, engine exhaust flows through channels formed by included angles of the blades, turbine blades arranged between the mounting disc and the rear cover are driven to rotate, and a pressing wheel connected with the shifting disc is driven to compress fresh air to supply air to an engine for acting.

Wherein blade, shift fork generally adopt modes fixed connection such as welding rivet, the friction motion of line contact is produced with the mounting hole to the blade pole, and the side of shift fork also is the friction motion of line contact with the dial plate, except the normal corrosive wear of blade in normal life-span, the blade pole easily produces friction micro-welding, friction wear with the mounting hole, and the deformation of dial plate will make the wearing and tearing between dial plate and the shift fork aggravate, this is one of the main inefficacy reasons of turbocharging variable cross section nozzle cascade in the use.

In addition, in order to reduce the driving force, the contact area and the friction and the abrasion during rotation, the thickness of the poking disc is controlled to be smaller, the exhaust temperature of the engine is very high, the maximum exhaust temperature of a common gasoline engine can reach 1050 ℃, the exhaust temperature of a diesel engine can reach about 850 ℃, and the poking disc is used as a thin-walled circular ring piece with a larger diameter and is easy to deform under the action of high-temperature exhaust gas, so that the poking disc and the poking disc are matched to lose efficacy and are blocked.

The patent publication CN209569033U discloses a turbocharger with variable turbine geometry, the adjusting ring being made of sheet metal, the adjusting ring being arranged on the cylindrical surface of the blade bearing ring. Wherein the adjusting ring is the driving disk promptly, and the blade bearing ring is the mounting disc promptly, and the driving disk is circular dull and stereotyped structure in this publication, and easy thermal deformation to, it is spacing with the step face of mounting disc to dial the driving disk, and the lower surface and the interior hole face of stirring the dish contact with the mounting disc, and the contact surface is great, and frictional force is great, and wearing and tearing are more serious.

Further, patent publication No. CN102121401A provides a variable vane assembly having a unison ring that is disposed close to the first face of the nozzle ring, contacts raised washers on the nozzle ring, and that is positioned by providing a spacing unison ring such as radial guide rollers, axial-radial guide pins, etc., i.e., positioning a circular flat dial plate using pins, rollers, etc., requires multiple parts, is costly, and is subject to buckling deformation under heat conditions that cause seizure.

To sum up, current nozzle ring is dialled driving disk and mounting disc and is the face contact, and area of contact is great, and frictional force is great, and wearing and tearing are more serious, and the stirring dish is the dull and stereotyped structure of ring shape, yielding under the effect of friction action and car high temperature waste gas, and the wearing and tearing between aggravation stirring dish and the shift fork lead to the card to die.

SUMMERY OF THE UTILITY MODEL

This disclosure is to prior art in, stir the dish design and be the flat plate structure, stir the dish and easily rub the loss, be heated deformation and lead to the dead problem of card, provide a gasoline engine turbocharging variable cross section nozzle ring, it has improved the structure of stirring the dish for stir the difficult deformation of dish, it is more durable, and with low costs.

One of the concepts of the present disclosure is that, on the existing annular flat plate toggle disc, a protruding structure is added as a reinforcing rib, so that the toggle disc is structurally and mechanically strengthened, and is not easily deformed in a high temperature environment.

Another concept of the present disclosure is that the toggle plate contacts the mounting plate through the protrusion structure, which reduces the contact area between the toggle plate and the mounting plate, and reduces the friction loss, and the protrusion structure can be used for axial positioning and/or radial positioning.

Another concept of the present disclosure is to provide a radial limiting mechanism on the mounting plate to prevent the inner hole of the toggle plate from directly contacting the mounting plate, thereby reducing the contact surface and the friction force.

Another idea of the present disclosure is that a surface of the protrusion structure contacting the mounting plate is provided as a convex curved surface such that the protrusion structure forms a line contact with the mounting plate.

The utility model provides a pair of gasoline engine turbocharging variable cross section nozzle cascade, including back shroud, distance component, blade, mounting disc, shift fork, dial the dish, back shroud, mounting disc, dial the dish and set gradually, realize parallel arrangement through the distance component between back shroud and mounting disc, be provided with the flag-shaped blade of a set of circumference array between back shroud and mounting disc, the blade passes through the blade pole and connects the mounting disc, and blade and shift fork are connected respectively at blade pole both ends, dial the dish and be used for controlling the shift fork angle to the adjustment blade angle.

Further, stir the dish and include annular piece and protruding structure, protruding structure sets up on the annular piece, for the flat dish of dialling of traditional annular, the protruding structure that this disclosure adds can regard as the strengthening rib, makes to stir the dish and have better anti deformability, non-deformable under high temperature environment to, protruding structure can be used for stirring the axial positioning of dish and \ or radial positioning, makes to stir dish erection site more accurate, and the contact surface of stirring dish and mounting disc is littleer, and frictional force is littleer, reduces the wearing and tearing deformation of stirring the dish.

In some embodiments, the protrusion structure may be an annular axial protrusion, or a strip-shaped axial protrusion, or a dot-shaped axial protrusion, the annular axial protrusion serves as a reinforcing rib to enhance the mechanical performance of the toggle plate, and the dot-shaped axial protrusion and the strip-shaped axial protrusion can further reduce the contact and friction area between the toggle plate and the step surface of the mounting plate compared with the annular axial protrusion.

Furthermore, the protruding structure can be set as that the annular axial protrusion is arranged on the basis of the annular axial protrusion, wherein the annular axial protrusion is mainly used for increasing the mechanical property of the dial plate and preventing deformation, and the point-shaped axial protrusion is mainly used for reducing the contact area between the dial plate and the mounting plate and reducing friction force.

Or, protruding structure can also include along stirring radial protrusion that the dish radially set up, radial protrusion sets up on the hole or the annular axial of stirring the dish is protruding, and radial protrusion is used for reducing the area of contact between stirring dish hole and the mounting disc outer peripheral face to be used for stirring the radial positioning of dish.

In some embodiments, the poking disc can be manufactured by powder metallurgy, casting or machining, and preferably, the protruding structure is manufactured by a stamping process, so that the manufacturing cost is low, and the production efficiency is higher.

In some embodiments, the protruding structure is a block-shaped protrusion, the block-shaped protrusion has an outward curvature relative to the center of the dial, one end of the block-shaped protrusion is disposed in the inner hole of the dial, and the other end of the block-shaped protrusion abuts against the step surface of the mounting plate, so as to be used for axial positioning. The block-shaped bulges are obtained by stamping and bending relative to the annular sheet, and are convenient to process and easy to form.

In some embodiments, the contact surface of the protruding structure and the mounting disc is a convex curved surface, and the convex curved surface is used for enabling the poking disc to be in line contact with the disc surface of the mounting disc, so that the friction force is smaller, the positioning is more reliable, and meanwhile, various additional accessories such as roller pins, rollers and bosses in the prior art are omitted, so that the cost is lower.

In some embodiments, the mounting disc is provided with a radial limiting mechanism to prevent an inner hole of the toggle disc from directly contacting with a step surface of the mounting disc, so that a contact surface and friction force are reduced.

Furthermore, the radial limiting mechanism is arranged on the outer peripheral surface of the mounting disc in a machining or assembling mode.

Furthermore, the radial limiting mechanism is arranged to be a boss, a cylindrical pin or an insert, and the pin or the insert is assembled on the mounting disc, so that the processing cost for directly processing the boss on the mounting disc can be reduced.

Further, the mounting disc can adopt the assembly of little clearance with stirring the driving disk to improve the positioning accuracy who stirs the driving disk, the uniformity when guaranteeing to dial the driving disk and adjusting the shift fork.

Furthermore, the end surface of the pin or the insert can be made into a spherical surface or an arc surface, and is more attached to the surface of the inner hole of the poking disc.

Furthermore, the pin and the insert can be made of high-temperature-resistant alloy materials with good self-lubricating performance such as nodular cast iron and the like, and can also be made of other materials with high-temperature-resistant coatings or other metal or nonmetal materials with good high-temperature resistance and wear resistance.

Compared with the prior art, the beneficial effects of the turbocharging variable-section nozzle ring of the gasoline engine provided by the disclosure are as follows:

1) the protrusion structure is arranged on the poking disc, so that the poking disc not only can play a role of reinforcing ribs to ensure that the poking disc is not easy to deform, but also can play a role of positioning the poking disc, the contact area between the poking disc and the mounting disc is reduced, and the poking disc has small friction force and small friction loss; in addition, the poking disc can be processed by stamping to save the processing cost; the contact surface of the convex structure and the mounting disc is set to be a convex curved surface, so that the convex structure and the mounting disc surface form line contact, friction can be further reduced, and the cost for arranging additional accessories is reduced; the bulge structure can also be a radial bulge, so that the inner hole of the toggle plate is positioned more accurately, the friction force between the inner hole and the outer peripheral surface is reduced, and the reliability and the flexibility of the nozzle ring are improved.

2) Through designing radial stop gear on the mounting disc, fix a position the hole of dialling the driving disc, reduce contact surface and frictional force, can carry out more accurate location to dialling the disc, make the flow uniformity of nozzle cascade better, the work is more reliable under the high temperature.

Drawings

The present disclosure will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the present disclosure. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.

FIG. 1: the structure schematic diagram of a first poking disc is provided by the disclosure;

FIG. 2 is a schematic diagram: the structure schematic diagram of a second poking disc is provided by the disclosure;

FIG. 3: the structure schematic diagram of a third dial plate provided by the present disclosure;

FIG. 4 is a schematic view of: the structure schematic diagram of a fourth poking disc provided by the disclosure;

FIG. 5 is a schematic view of: the structure schematic diagram of a fifth toggle plate provided by the present disclosure;

FIG. 6: the structure schematic diagram of a sixth poking disc provided by the disclosure;

FIG. 7: the structure schematic diagram of a seventh poking disc provided by the present disclosure;

FIG. 8: the present disclosure provides a gasoline engine turbocharging variable cross section nozzle ring front view sketch map (dotted line represents perspective);

FIG. 9: FIG. 8 is a schematic sectional view taken along line A-A;

FIG. 10: FIG. 9 is a partially enlarged schematic view of the structure;

wherein, 1, installing a disc; 11. a step surface; 12. an outer peripheral surface; 2. a distance element; 3. a rear cover plate; 4. a shifting fork; 5. a leaf stem; 6. a shaft sleeve; 7. a dial plate; 71. an annular sheet; 72. a punctiform axial bulge; 73. the strip-shaped axial bulge is formed; 74. an annular axial projection; 75. a block-shaped bulge; 751. a first curved surface; 752. a second curved surface; 76. a radial projection; 8. radial stop gear.

Detailed Description

The present disclosure is described in detail below with reference to the attached drawing figures.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present disclosure will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the disclosure and are not intended to limit the disclosure.

The first embodiment is as follows: the utility model provides a variable cross-section nozzle ring of gasoline engine turbocharging, the detailed description is as follows:

as shown in fig. 8-10, the nozzle ring includes back shroud 3, distance component 2, blade, mounting disc 1, shift fork 4, dial dish 7, and back shroud 3, mounting disc 1, dial dish 7 set gradually, are connected and keep parallel as far as possible through distance component 2 between back shroud 3 and mounting disc 1, are provided with the flag shape blade of a set of circumference array between back shroud 3 and mounting disc 1, and the height of distance component 2 is greater than the height of blade, ensures that the blade has certain clearance to rotate between mounting disc 1 and back lid.

The blade passes through blade pole 5 and connects mounting disc 1, and blade and shift fork 4 are connected respectively to 5 both ends of blade pole, and dial 7 is used for controlling 4 angles of shift fork to the adjustment blade angle.

Dial driving disk 7 and include annular piece 71 and protruding structure, protruding structure sets up on annular piece 71, and the strengthening rib can be regarded as to protruding structure, makes dial driving disk 7 have better anti deformability, and non-deformable under high temperature environment, simultaneously, protruding structure is used for making dial 7 installation location more accurate, and the contact surface that makes dial 7 and mounting disc 1 is littleer, and frictional force is littleer, reduces wearing and tearing.

As shown in fig. 3, 4, and 6, the protrusion structure is disposed on the dial plate 7, and may be an annular axial protrusion 74, a strip-shaped axial protrusion 73, or a dot-shaped axial protrusion 72, where the annular axial protrusion 74 serves as a reinforcing rib to enhance the mechanical property of the dial plate 7, and the dot-shaped axial protrusion 72 and the strip-shaped axial protrusion 73 can further reduce the contact and friction area between the dial plate 7 and the step surface 11 of the mounting plate 1 compared with the annular axial protrusion 74.

Further, the inner diameter of the annular axial protrusion 74 is larger than the inner diameter of the annular plate 71, and the outer diameter of the annular axial protrusion 74 is smaller than the outer diameter of the annular plate 71

Further, as shown in fig. 5, the protrusion structure may be configured to further include a dot-shaped axial protrusion 72 on the basis of the annular axial protrusion 74, where the annular axial protrusion 74 is mainly used to increase the mechanical property of the dial plate 7 and prevent deformation, and the dot-shaped axial protrusion 72 is mainly used to reduce the contact area between the dial plate 7 and the mounting plate 1 and reduce the friction force.

Or, as shown in fig. 1 and 7, the protrusion structure may further include a radial protrusion 76 disposed along the radial direction of the dial plate 7, the radial protrusion 76 is disposed on the inner hole or the annular axial protrusion 74 of the dial plate 7, and the radial protrusion 76 is used for reducing the contact area between the inner hole of the dial plate 7 and the outer peripheral surface 12 of the mounting plate 1 and for radially positioning the dial plate 7.

The poking disc 7 can adopt the processes of powder metallurgy, casting or machining and the like, preferably adopts a stamping process to obtain a convex structure, and has low processing cost and higher production efficiency.

The contact surface of the convex structure and the mounting disc 1 is designed to be a convex curved surface, and the convex curved surface is used for enabling the poking disc 7 to be in line contact with the disc surface of the mounting disc 1, so that the friction force is smaller, the positioning is more reliable, and meanwhile, various additional accessories such as roller pins, rollers, bosses and the like in the prior art are omitted, so that the cost is lower.

In the second embodiment, based on the modification of the first embodiment, the toggle plate 7 provided by the present disclosure is described in detail as follows:

the protruding structure is block-shaped protrusion 75, and the block-shaped protrusion 75 has an outward-bending radian relative to the center of the toggle plate and can be used for axial positioning and radial positioning at the same time.

More specifically, one end of the block-shaped protrusion 75 is disposed in an inner hole of the toggle plate, and the other end of the block-shaped protrusion is abutted against the step surface 11 of the mounting plate, so that the block-shaped protrusion 75 can be used for axial positioning, the block-shaped protrusion 75 has a first curved surface 751 and a second curved surface 752, the first curved surface 751 is close to the center of the toggle plate and is an inward convex curved surface, the second curved surface 752 is far away from the center of the toggle plate and is an inward concave curved surface, and the first curved surface 751 of the block-shaped protrusion 75 is in contact with the outer peripheral surface 12 of the mounting plate, so that radial positioning can be achieved. The block-shaped protrusion 75 is obtained by stamping and bending relative to the annular sheet 71, and is convenient to process and easy to form.

As shown in fig. 1, the annular piece 71 is provided with a radial projection 76 and a block projection 75, the surface of the radial projection 76 contacting the outer peripheral surface 12 of the mounting disk is provided with a curved surface, and the block projection 75 is provided with a first curved surface 751 and a second curved surface 752.

Based on the deformation of fig. 1, as shown in fig. 2, only the block-shaped protrusion 75 is provided to achieve the axial positioning and the radial positioning of the dial plate at the same time, and reduce the contact area between the dial plate and the step surface 11 of the mounting plate and the outer peripheral surface 12 of the mounting plate.

As shown in fig. 5, at least three block-shaped protrusions 75 are provided to ensure uniform stress between the mounting plate 1 and the dial plate 7, and similarly, at least three point-shaped axial protrusions 72 and at least two strip-shaped axial protrusions 73 are provided, where the number of the strip-shaped axial protrusions (73) is at least two.

The third embodiment is based on the further improvement of the first embodiment and the second embodiment, the third embodiment provides a turbine supercharging variable-section nozzle ring of the gasoline engine, and the mounting disc 1 is provided with a radial limiting mechanism 8 to prevent an inner hole of the dial plate 7 from directly contacting with a step surface 11 of the mounting disc 1, so that a contact surface and friction force are reduced.

At least three radial limiting mechanisms 8 which are radially arranged outwards are distributed on the mounting disc 1 along the circumferential direction, the end faces of the radial limiting mechanisms 8 are processed into arc surfaces or spherical surfaces, and small assembling gaps are kept between the end faces and the inner hole surface of the toggle disc 7 and are used for radially limiting the toggle disc 7.

Further, the radial limiting mechanism 8 is disposed on the outer circumferential surface 12 of the mounting plate 1 by machining or assembling.

Further, the radial limiting mechanism 8 is arranged as a boss, a cylindrical pin or an insert.

Further, the mounting disc 1 can adopt the assembly of little clearance with stirring dish 7 to improve the positioning accuracy who stirs driving disk 7, the uniformity when guaranteeing to stir driving disk 7 and adjusting shift fork 4.

Furthermore, the end face of the pin or the insert can be made into a spherical surface or an arc surface and is more attached to the surface of the inner hole of the poking disc 7, and the pin or the insert is assembled on the mounting disc 1, so that the processing cost for directly processing the boss on the mounting disc 1 can be reduced.

Further, in order to avoid micro welding and adhesion which may be generated by friction between the blade rod 5 and the mounting hole of the mounting disc 1 at high temperature, a shaft sleeve 6 or a high-temperature coating is arranged outside the blade rod 5 and used for reducing abrasion between the blade rod 5 and the mounting hole and avoiding generation of friction micro welding and adhesion.

This embodiment is through designing radial stop gear 8 on mounting disc 1, fixes a position the hole of stirring dish 7, reduces contact surface and frictional force, can carry out more accurate location to stirring dish 7, makes the flow uniformity of nozzle cascade better, and the work is more reliable under the high temperature.

The present disclosure has been described in detail above, and the principles and embodiments of the present disclosure have been explained herein using specific examples, which are provided only to assist understanding of the present disclosure and the core concepts. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present disclosure without departing from the principle of the present disclosure, and such improvements and modifications also fall within the scope of the claims of the present disclosure.

Claims

1. The utility model provides a variable cross-section nozzle ring of gasoline engine turbocharging which characterized in that: including blade, mounting disc (1), shift fork (4), dial driving disk (7), the blade passes through leaf pole (5) and connects mounting disc (1), and leaf pole (5) both ends are connected blade and shift fork (4) respectively, dial driving disk (7) suit on mounting disc (1), be equipped with radial stop gear (8) on mounting disc (1) for radial positioning dials driving disk (7), dial the driving disk and be used for controlling shift fork (4) angle, thereby adjust the blade angle, dial driving disk (7) including annular piece (71) and protruding structure, protruding structure sets up on annular piece (71), can be used for axial positioning and \ or radial positioning.

2. The turbocharging variable cross-section nozzle ring of the gasoline engine of claim 1, characterized in that: the surface of the convex structure contacting with the mounting disc (1) is set to be a convex curved surface, so that line contact is formed between the convex structure and the surface of the mounting disc (1).

3. The turbocharging variable-section nozzle ring of the gasoline engine according to claim 1, characterized in that: the protruding structure is arranged on the disc surface of the dial plate (7), the protruding structure is a point-shaped axial protrusion (72), or a strip-shaped axial protrusion (73), or an annular axial protrusion (74), wherein the point-shaped axial protrusions (72) are at least three, and the strip-shaped axial protrusions (73) are at least two.

4. The turbocharging variable-section nozzle ring of the gasoline engine according to claim 3, characterized in that: the protruding structure can also comprise a radial protrusion (76) arranged along the radial direction of the dial plate (7), and the radial protrusion (76) is arranged at the inner hole of the dial plate (7) or on the annular axial protrusion (74).

5. The turbocharging variable-section nozzle ring of the gasoline engine according to claim 1, characterized in that: protruding structure includes cubic arch (75), and cubic arch (75) have and dial driving disk (7) center incurvate radian relatively, and cubic arch (75) one end sets up at dial driving disk (7) hole, and the other end supports at mounting disc (1) step face (11) to, cubic arch (75) have first curved surface (751) and second curved surface (752), first curved surface (751) are close to dial driving disk (7) center, for interior convex surface, second curved surface (752) are kept away from and are dialled driving disk (7) center, are the indent curved surface.

6. The turbocharging variable-section nozzle ring of the gasoline engine according to claim 5, characterized in that: the block-shaped protrusions (75) are arranged in at least three numbers.

7. The turbocharging variable cross-section nozzle ring of the gasoline engine of claim 1, characterized in that: protruding structure includes along radial protruding (76) of dialling driving disk (7) radial setting and cubic protruding (75), and cubic protruding (75) have the radian of the relative outside bending in dialling driving disk (7) center.

8. The turbocharging variable-section nozzle ring of the gasoline engine according to claim 1, characterized in that: the radial limiting mechanism (8) is arranged to be a boss, a cylindrical pin or an insert.

9. The turbocharging variable-section nozzle ring of the gasoline engine according to claim 8, characterized in that: the end surface of the pin or the insert is a curved surface.