CN214196471U - Waste gate assembly, device, turbo charger and vehicle - Google Patents

Abstract

The utility model provides a wastegate assembly, a device, a turbocharger and a vehicle. The wastegate assembly comprises a wastegate, a wastegate shaft and a bushing, wherein the wastegate shaft is inserted into the bushing, and the bushing Set the limit ring. In the utility model, a limit ring is arranged on the bushing to control the free gap between the vortex end rocker arm and the bushing, which can control the gap to a small extent and reduce the impact noise between the vortex end rocker arm and the bushing.

Description

Waste gate assembly, device, turbo charger and vehicle

Technical Field

The utility model relates to the field of automotive technology, especially, relate to a waste gate subassembly, device, turbo charger and vehicle.

Background

A turbocharger is a device that increases the intake air quantity of an engine, thereby increasing the power and torque of the engine.

In general, in order to ensure that low-speed torque is matched at low speed, and the matching result causes turbine power to be excessive under high-speed and heavy load, and overspeed occurs, therefore, an exhaust gas release valve is required to design a part of engine exhaust gas to bypass a turbine wheel so as to reduce excessive turbine power. Therefore, the exhaust gas release valve can play a role in adjusting the power of the turbine, and the turbocharger can have higher degree of freedom to meet various use conditions of the automobile.

A wastegate device typically consists of a wastegate valve, a wastegate shaft, a bushing, a crank mechanism that drives the wastegate shaft in rotation, and an actuator. Because of discontinuity of engine exhaust, there are pulses in the engine exhaust, and because the engine exhaust temperature is usually very high, the waste gate device is easy to wear, block, noise and even damage under the combined action of the pulses and the high temperature.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a waste gate assembly, device, turbo charger and vehicle to reduce waste gate device wearing and tearing, jamming, noise and damage the risk even.

The utility model provides a waste gate subassembly, including waste gate, waste gate axle and bush, the waste gate axle inserts in the bush, the bush is provided with the spacing ring.

Further, the middle part of waste valve shaft surface is sunken downwards and is formed with the recess, the longitudinal section of waste valve shaft is the notch cuttype.

The utility model also provides a waste gas door device, including the waste gas door, with waste gas door axle, the cover that the waste gas door is connected are located bush on the waste gas door off-axial surface to and the rotatory crank link mechanism of drive waste gas door axle, crank link mechanism includes whirlpool end rocking arm and connecting rod, whirlpool end rocking arm with the waste gas door hub connection, the connecting rod promotes whirlpool end rocking arm, the waste gas door axle inserts the bush and with whirlpool end rocking arm is connected, the bush with whirlpool end rocking arm connection part is provided with the spacing ring.

Further, an elastic cushion is arranged between the vortex end rocker arm and the connecting rod.

Further, the elastic pad is in a multilayer spiral warping ring shape.

Further, the middle part of waste valve shaft surface is sunken downwards and is formed with the recess, the longitudinal section of waste valve shaft is the notch cuttype.

The utility model provides a turbo charger again, including turbine housing and wastegate device, wastegate device include the wastegate, with wastegate shaft, cover that the wastegate shaft is connected are located bush on the wastegate shaft surface to and the rotatory crank link mechanism of drive wastegate shaft, crank link mechanism includes whirlpool end rocking arm and connecting rod, whirlpool end rocking arm with the wastegate shaft is connected, the connecting rod promotes whirlpool end rocking arm, the wastegate is the stopper form, the wastegate shaft inserts the bush and with whirlpool end rocking arm is connected, the bush with whirlpool end rocking arm connected part is provided with the spacing ring.

Further, the wastegate valve is provided in a plurality of plug shapes for controlling flow characteristics, including a single-layer circular truncated cone shape, a double-layer circular truncated cone shape, and a hemispherical circular truncated cone shape.

Further, the vortex end rocker arm is connected with the connecting rod through a pin, and an elastic cushion is arranged between the vortex end rocker arm and the connecting rod.

The utility model discloses finally provide a vehicle, the vehicle has above-mentioned arbitrary turbocharger.

The utility model discloses welding the free clearance between spacing ring control whirlpool end rocking arm and the bush on the bush, can reduce the striking noise between whirlpool end rocking arm and the bush with clearance control in very little degree. In addition, the axial displacement of stop collar can also control the waste gate axle, and the accurate passageway of disappointing is filled in to the waste gate of being convenient for, avoids the waste gate to be blocked at the closing in-process.

Drawings

FIG. 1 is a schematic view of a turbocharger according to a preferred embodiment of the present invention;

FIG. 2 shows a first air flow path and a second air flow path of the turbocharger of FIG. 1;

FIG. 3 shows a wastegate shaft and bushing from the turbocharger of FIG. 1;

FIG. 4 is a schematic cross-sectional view of a wastegate shaft;

FIG. 5 is a schematic cross-sectional view of a wastegate and wastegate shaft;

FIG. 6 is a cross-sectional schematic view of a turbocharger having a wastegate shaft;

FIG. 7 is another cross-sectional schematic view of a turbocharger having a wastegate shaft;

FIG. 8 is an enlarged schematic view of a spring washer in the turbocharger of FIG. 1;

FIG. 9 is an enlarged schematic view of a wastegate and wastegate shaft of the integrated design in the turbocharger of FIG. 1;

FIG. 10 shows various shapes of the waste gate of the present invention;

FIG. 11 shows the structure of the waste gate of the present invention for guiding the flow direction of the air stream;

FIG. 12 shows flow characteristics for a wastegate of the non-integral design and a wastegate of the integral design;

fig. 13 shows the gas forces experienced by a wastegate of the non-integrated design and a wastegate of the integrated design near a small opening.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

Referring to fig. 1, the present invention provides a turbocharger according to a preferred embodiment of the present invention, as shown in fig. 1, the turbocharger 100 mainly includes the following 6 components: the turbine engine comprises a turbine housing 1, a waste gate 2, a bushing 3, a limit ring 4, a vortex end rocker arm 5, an elastic cushion 6, a connecting rod 7 and a driver 8. A wastegate shaft 21 is connected to the wastegate 2 and the turbine housing 1 comprises a bore for supporting the scroll-end rocker arm 5, in which bore a bush 3 is fitted which cooperates with the wastegate shaft 21. The driver 8 is connected with the connecting rod 7, the vortex end rocker arm 5 is pushed to rotate through the connecting rod 7, an elastic cushion 6 is arranged between the connecting rod 7 and the vortex end rocker arm 5, the vortex end rocker arm 5 is connected with the waste valve shaft 21, the waste valve 2 is enabled to rotate correspondingly, the waste valve is plugged into a gas leakage flow passage of the turbine, namely a second gas flow passage 13 shown in the figure 2, the inner part of the second gas flow passage is sealed, the waste valve shaft 21 is inserted into a bushing, the bushing 3 is installed on the turbine connecting shell 1, and a limiting ring is welded on the bushing. Referring to fig. 2, the turbine housing 1 has two air flow passages, a first air flow passage 11 and a second air flow passage 12, the first air flow passage 11 guides the air flow to the turbine wheel, and the second air flow passage 13 guides the air flow to bypass the turbine wheel.

Referring to fig. 1 and 3, the wastegate 2, the wastegate shaft 21, and the bushing 3 of the turbocharger 100, described above, may be referred to as a wastegate assembly 20. In the preferred embodiment of the invention, the wastegate shaft 21 is inserted into a bushing 3, the bushing 3 being provided with a stop ring 4 for welding on the bushing 3. The limit ring 4 is in interference fit with the bushing 3 and is clamped and welded to the bushing 3, and the limit ring 4 is preferably circular. The retainer ring 4 is installed between the wastegate shaft 21 and the bush 3. Referring next to fig. 4, a central portion of the outer surface of the wastegate shaft 21 is recessed downward to form a groove 211, so that the wastegate shaft 21 has a stepped longitudinal section.

The stepped design of the wastegate shaft 21 compensates for the risk of jamming due to the small clearance caused by the expansion deformation at this location, and as can be seen in figure 5, the stepped shape has the advantage of reducing the fit clearance Δ y1 between the wastegate shaft 21 and the bushing 3. If the stepped structure is not provided, the part of the waste valve shaft 21 matched with the middle of the bush 3 expands and deforms at high temperature, so that abrasion is increased and clamping stagnation occurs, and the stepped design can increase the clearance delta y2 of the part of the waste valve shaft 21 matched with the middle of the bush 3, so that the purpose of reducing the matching clearance is achieved. And the reduction of the clearance can improve the radial shaking and axial moving amplitude of the waste gate shaft, and is beneficial to the reduction of noise. In addition, referring to fig. 6, when the above waste gate assembly is applied to a waste gate device described below, the stepped design can reduce the speed and flow of high-temperature and high-pressure gas in the volute through the gap between the waste gate shaft 21 and the bushing 4, and can further reduce the axial movement of the waste gate shaft 21 and reduce the impact noise between the vortex end rocker arm 5 and the bushing 3.

Preferably, the wastegate shaft 21 is integrally formed with the wastegate 2 to avoid chattering noise that is common with split designs.

Referring again to fig. 1, the wastegate valve 2, the wastegate shaft 21 connected to the wastegate valve, the bushing 3 sleeved on the outer surface of the wastegate shaft 21, and the crank mechanism 41 for driving the wastegate shaft 21 to rotate in the turbocharger 100 may be referred to as a wastegate device 40. As shown in fig. 1, the crank link mechanism 41 includes a scroll-end rocker arm 5 and a link 7, the scroll-end rocker arm 5 being connected to the wastegate shaft 21, the link 7 pushing the scroll-end rocker arm 5. In the preferred embodiment of the present invention, the waste gate shaft 21 is inserted into the bushing 3 and connected to the scroll rocker arm 5, and the position where the bushing 3 is connected to the scroll rocker arm 5 is provided with the limit ring 4. The stop collar 4 is welded to the bushing 3.

Referring to fig. 7, the scroll rocker arm 5 is welded to the wastegate shaft 21, a plurality of free clearances are formed between the scroll rocker arm 5 and the bushing 3, including the first free clearance Δ X1 and the second free clearance Δ X2 shown in fig. 7, the limiting ring 4 is welded to the bushing 3, the clearance between the scroll rocker arm 5 and the bushing 3 of each turbocharger can be controlled online in real time, the clearance between the scroll rocker arm 5 and the bushing 3 can be controlled to be very small, Δ X1 is 0.1mm, and the clearance in this order does not cause perceptible impact noise, and Δ X2 is controlled to be greater than 0. The stop collar 4 is welded to the wastegate shaft 21 at position P shown in fig. 7.

As mentioned above, in the preferred embodiment of the present invention, the scroll-end rocker arm 5 and the connecting rod 7 may be connected by a pin. An elastic pad 6 is arranged between the vortex end rocker arm 5 and the connecting rod 7, and the elastic pad 6 is in a multilayer spiral warping ring shape, preferably 4 layers of spiral warping ring shapes. The spring washer 6 may be formed by stacking 4 layers of springs in a spirally warped loop, as shown in fig. 8. Referring to fig. 1, when the wastegate device 40 operates, the scroll rocker arm 5 is connected to the connecting rod 7 through a pin, the actuator 8 drives the connecting rod 7 to move, and when the scroll rocker arm 5 is connected to the connecting rod 7, a free gap is required due to tolerance accumulation of a dimension chain and movement of the crank connecting rod 7. To ensure that the noise generated by the impact is low, a spring washer is designed between them to eliminate the free gap. As mentioned above, the elastic pad 6 can be a multilayer spiral warping ring, and the design has the advantages that the free height of the elastic pad is higher and can reach more than 4mm, the compressibility is larger, larger free gaps can be eliminated, and meanwhile, the contact area is smaller, so that the friction force is not too large, and clamping stagnation and serious abrasion are not easy to cause.

The middle portion of the outer surface of the wastegate shaft 21 is recessed downward to form a groove 211, so that the longitudinal section of the wastegate shaft 21 is stepped. On the one hand, as described above, the stepped shape of the wastegate shaft 21 can reduce the fit clearance Δ y1 between the wastegate shaft 21 and the bushing 3, thereby improving the radial sloshing and axial play of the wastegate shaft. On the other hand, in the present embodiment, the stepped shape of the waste gate shaft 21 also serves to stabilize the flow of the exhaust gas passing through the gap between the waste gate shaft 21 and the bush 3, thereby reducing the axial play of the waste gate shaft 21. Therefore, the stepped shape of the wastegate shaft 21 can reduce the impact noise between the scroll rocker arm 5 and the bush 3 by reducing the moving width of the wastegate shaft 21.

The present application further provides a turbocharger 100 comprising a turbine housing 1 and a wastegate device 40. The wastegate device 40 includes the wastegate valve 2, the wastegate shaft 21 connected to the wastegate valve 2, the bush 3 fitted over the outer surface of the wastegate shaft 21, and the crank mechanism 41 that drives the wastegate shaft 21 to rotate. The crank link mechanism 41 includes a scroll end rocker arm 5 and a link 7, the scroll end rocker arm 5 is connected to the wastegate shaft 21, and the link 7 pushes the scroll end rocker arm 5. In this embodiment, the wastegate valve 2 is in the form of a plug, the wastegate shaft 21 is inserted into the bush 3 and connected to the scroll rocker arm 5, and the stopper ring 4 is provided at the connection point of the bush 3 and the scroll rocker arm 5. In this embodiment, the wastegate valve 2 and the wastegate shaft 21 may be integrally formed, and the stopper ring 4 may be welded to the bush 3. The plug type waste gate 2 provided by the embodiment can not only reduce the stress of the waste gate 2 and further reduce the shaking of the waste gate 2 and the waste gate shaft 21, but also reduce the friction force between the waste gate shaft 21 and the bush 3, thereby reducing the abrasion between the waste gate shaft 21 and the bush 3.

In the present embodiment, the wastegate valve 2 is designed integrally with the wastegate shaft 21, as shown in fig. 9, so that the wastegate valve 2 can be made to have various shapes, and the wastegate valve 2 can be provided in various plug shapes having different control flow rate characteristics. The wastegate 2 can be sealed by being inserted into the bleed channel of the turbine housing 1, with the sealing being a line seal, which is also the basis for integrating the wastegate shaft 21 with the wastegate 2. The turbine housing 1 bleed flow path may be, for example, the second air flow path 12 shown in fig. 1.

In detail, one end of the waste gate 2, which is used for sealing the air leakage flow passage of the turbine housing, is in a curved geometry shape and can be plugged into the air leakage flow passage, and the other end of the waste gate is in a cylindrical shape and is inserted into the bushing 3 and connected with the vortex end rocker arm 5. The bushing 3 may be of a barrel type for supporting the wastegate shaft 21.

The wastegate valve 2 has a large degree of freedom in shape design, and for example, it has a single-layer circular truncated cone shape shown in fig. 10 a, a double-layer circular truncated cone shape shown in B, and a hemispherical circular truncated cone shape shown in C. Different shapes can realize different air leakage flow characteristics, and as shown in fig. 11, a structure 23 capable of guiding the airflow direction can be designed on the waste gate 2 to guide the high-temperature airflow to the center of the catalyst, improve the light-off of the catalyst and avoid the overhigh heat load of the local wall surface of the turbine shell or the catalyst barrel. FIG. 12 shows a wastegate flow characteristic of the non-integrated design and a wastegate flow characteristic of the integrated design. As shown in fig. 12, the integrally designed wastegate valve 2 has different flow characteristics when the shape is different, and the wastegate valve 2 having a different shape may be selected as needed.

Compared with a non-integrated plane sealing mode, the waste gate 2 with the integrated design provided by the embodiment can reduce the gas force applied to the waste gate 2 in the vicinity of a small opening. Referring to fig. 13, in fig. 13, F represents the gas force of the non-integrated wastegate 2 in the closed state and the small opening state, F1 represents the gas force of the integrated wastegate 2 in the fully closed state, and F2 represents the gas force of the integrated wastegate 2 in the small opening state. This is important because, as shown in fig. 13F-1 < F2, the reduced force on the wastegate 2 will improve wear of the wastegate shaft 21 and bushing 3 and vibration transfer to the rocker arm 5 and linkage, typically during wastegate movement, near the maximum wastegate shaft and bushing force and small opening, especially in the fully closed state.

In addition, the axial play amount of the waste valve shaft 21 can be controlled by the limiting ring 4, so that the waste valve shaft 21 is accurately plugged into the bushing 3 during assembly, the waste valve 2 is conveniently and accurately plugged into the air leakage channel, and the waste valve 2 is prevented from being closed or the waste valve 2 is prevented from being clamped in the closing process.

Vortex end rocking arm 5 and connecting rod 7 pass through pin connection, for avoiding the tremble noise that the integral type valve member clearance brought, are provided with between vortex end rocking arm 5 and the connecting rod 7 and play pad 6. The connecting rod 7 connects the driver 8 with the vortex end rocker arm 5. The driver can be a linear motor, a rotary motor or a pneumatic driver. The rod 7 is preferably cylindrical or flat, but may have other shapes. The scroll rocker arm 5 outputs the thrust force generated by the actuator 8 to the wastegate 2, and the scroll rocker arm 5 is preferably plate-shaped.

When the turbocharger 100 is in operation, the gas from the inlet of the turbine housing 1 can be discharged out of the turbine through two channels, one is to push the turbine to do work through the first gas flow channel 12, and the other is to bypass the turbine through the second gas flow channel 13 and directly discharge out of the turbine, and the output power of the turbine can be controlled by controlling the flow rate through the second gas flow channel 13. The waste gate device is a mechanism for controlling the flow rate of the air release flow channel, and referring to fig. 1, a driver 8 pushes a vortex end rocker arm 5 to rotate through a connecting rod 7, the rocker arm is connected with a waste gate shaft 21, the waste gate shaft 21 also rotates in a lining 3, when the waste gate shaft 21 rotates, a waste gate 2 correspondingly rotates, the waste gate 2 is matched with a turbine housing 1, the flow rate of air release is controlled through different matching angles, and the flow curve is shown in fig. 12. Because second airflow channel 13 pulse air current can cause waste gate axle 2 axial float at waste gate 2 rotation in-process, stop collar 4 can play the effect of restriction waste gate 2 axial float this moment, avoids the noise problem, and the mutual collision when rocking arm 5 and connecting rod 7 move can be avoided to the bullet pad 6 between vortex end rocking arm 5 and the connecting rod 7 in addition to avoid arousing the noise.

The utility model discloses finally provide a vehicle, the vehicle has any kind of above-mentioned turbo charger.

To sum up, the utility model provides a turbo charger's waste gas door device, its waste gas door and waste gas door axle integral type shaping, the waste gas door cooperates through the waste gas door that is the sealing plug form with the worm gear casing, for guaranteeing the location accuracy of waste gas door axle 21, ensure axial dimensions through welding spacing ring 4 on waste gas door axle 21, waste gas door axle 21 links to each other with whirlpool end rocking arm 5, whirlpool end rocking arm 5 links to each other with driver 8 through connecting rod 7, it eliminates the free clearance between whirlpool end rocking arm 5 and connecting rod 7 to be equipped with between whirlpool end rocking arm 5 and the connecting rod 7 to play the pad 6 between whirlpool end rocking arm 5 and connecting rod 7. The spiral warping annular elastic pad 6 between the vortex end rocker arm 5 and the connecting rod 7 can eliminate a large free gap, and meanwhile, the friction force caused by the structure of the elastic pad 6 is small, so that clamping stagnation and serious abrasion are not easy to cause. The utility model provides a waste gate device, low noise low wearing and tearing, noise reduction and wearing and tearing that can show. Furthermore, the utility model provides a different control characteristic of wastegate 2 can be realized to various design of wastegate.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A wastegate assembly comprising a wastegate (2), a wastegate shaft (21) and a bushing (3), characterized in that the wastegate shaft (21) is inserted in the bushing (3), the bushing (3) being provided with a stop ring (4).

2. The wastegate assembly of claim 1, wherein a central portion of the outer surface of the wastegate shaft (21) is recessed downward to form a recess, and the longitudinal section of the wastegate shaft (21) is stepped.

3. A wastegate device, including wastegate (2), with wastegate shaft (21) that wastegate (2) is connected, the cover is located bush (3) on wastegate shaft (21) surface to and rotatory connecting rod (7) crank link mechanism (41) of drive wastegate shaft (21), connecting rod (7) crank link mechanism (41) include vortex end rocking arm (5) and connecting rod (7), vortex end rocking arm (5) with wastegate shaft (21) is connected, connecting rod (7) promote vortex end rocking arm (5), its characterized in that: the waste valve shaft (21) is inserted into the bushing (3) and connected with the vortex end rocker arm (5), and a limiting ring (4) is arranged at the connection part of the bushing (3) and the vortex end rocker arm (5).

4. Wastegate arrangement according to claim 3, characterized in that a spring washer (6) is arranged between the swirl rocker (5) and the connecting rod (7).

5. The wastegate apparatus of claim 4 wherein the spring washer (6) is a multi-layer helically warped ring.

6. The wastegate apparatus of claim 4, wherein the middle portion of the outer surface of the wastegate shaft (21) is recessed downward to form a recess, and the longitudinal section of the wastegate shaft (21) is stepped.

7. A turbocharger, including turbine housing (1) and wastegate device (40), wastegate device (40) include wastegate (2), with wastegate axle (21), the cover that wastegate axle (21) is connected are located bush (3) on wastegate axle (21) surface to and the rotatory crank link mechanism (41) of drive wastegate axle (21), crank link mechanism (41) include vortex end rocking arm (5) and connecting rod (7), vortex end rocking arm (5) with wastegate axle (21) is connected, connecting rod (7) promote vortex end rocking arm (5), its characterized in that: waste gate (2) are the stopper form, waste gate axle (21) insert bush (3) and with vortex end rocking arm (5) are connected, bush (3) with vortex end rocking arm (5) are connected the place and are provided with spacing ring (4).

8. The turbocharger according to claim 7, wherein the wastegate (2) is provided in a plurality of plug shapes for controlling flow characteristics, the plug shapes including a single-layer truncated cone shape, a double-layer truncated cone shape, and a hemispherical truncated cone shape.

9. The turbocharger according to claim 7, wherein the vortex end rocker arm (5) and the connecting rod (7) are connected by a pin, and a spring washer (6) is arranged between the vortex end rocker arm (5) and the connecting rod (7).

10. A vehicle characterized in that it has a turbocharger according to any one of claims 7 to 9.

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