An adjustable turbine increasing nozzle ring structure

Abstract

The present invention discloses an adjustable turbine nozzle ring structure, which includes a mounting disc, a support disc, a fork ring, a fork, and nozzle vanes mounted on the fork. The nozzle vanes include upper nozzle vanes and lower nozzle vanes. The lower nozzle vanes are connected to the upper nozzle vanes through a connecting mechanism. The connecting mechanism pushes the upper end of the upper nozzle vane to keep it in contact with the lower end of the mounting disc, and the connecting mechanism pushes the lower end of the lower nozzle vane to keep it in contact with the upper end of the support disc. When the temperature changes, the dimensional changes at the upper and lower ends of the nozzle vanes are adjusted through an adjusting mechanism to ensure that the upper and lower ends of the nozzle vanes are always in flexible contact with the bottom end of the mounting disc and the upper end of the support disc, thereby improving the efficiency of the turbine.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive engine accessories, and particularly to an adjustable turbine increasing nozzle ring structure. Background Art

[0002] With the increasingly strict emission regulations, turbocharging technology has become an essential key technology for internal combustion engines. In order to enable an automobile to generate greater power, a turbocharger is usually installed on the engine. The nozzle ring is one of the important components of the turbocharger, and it is installed in the volute of the turbocharger.

[0003] To ensure the free rotation of the nozzle blades and prevent the nozzle blades and their surrounding components from being deformed by the combustion gas heat and affecting their rotation, a relatively large gap is usually designed between the two end faces of the nozzle blades and the respective walls opposite to them. It is known that the pressures on the two side faces of the nozzle blades are different, and the gap between the two end faces and the respective walls opposite to them causes gas to leak from the side with higher pressure to the side with lower pressure, and this leakage will cause a loss of turbine efficiency. In particular, when the opening degree of the nozzle blades is small, the efficiency loss of the turbine mainly comes from the air flow leakage caused by the gap between the two end faces of the nozzle blades. Therefore, how to maximize the avoidance of air flow leakage and reduce the loss of turbine efficiency is an urgent problem to be solved by those in the same industry.

[0004] At the same time, for the existing nozzle rings, such as a nozzle ring assembly for a turbocharger disclosed in Chinese Patent Publication No. CN205172642U, which includes a blade welding assembly, a spacer sleeve, rollers, a backing plate, an intake connecting pipe, an inner hexagon screw, a gasket, a dial, a driving fork and a blade. The lower end of the dial is a planar structure, and a gasket is installed between the dial and the blade welding assembly. A number of rollers are installed in the mounting holes of the gasket, and the dial is arranged on the rollers. However, this assembly structure is complex, the number of parts used is large, the structural strength is reduced, the process cost is increased at the same time, and there is a risk of falling off at high temperatures. The dial is arranged on the rollers and swings together with the blade welding assembly, which is prone to swing errors. Summary of the Invention

[0005] The purpose of the present invention is to provide an adjustable turbine increasing nozzle ring structure.

[0006] The above technical purpose of the present invention is achieved through the following technical solutions:

[0007] An adjustable turbine increasing nozzle ring structure, comprising a mounting disc, a support disc, a fork ring, forks and nozzle vanes mounted on the forks. The mounting disc is provided with connecting holes, and the support disc is provided with threaded holes corresponding to the connecting holes. The two are connected and fixed by a connecting screw passing through the connecting hole and matching with the threaded hole. A support rod is installed between the mounting disc and the support disc. The two ends of the support rod are respectively inserted into the positioning holes on the mounting disc and the support disc. The diameter of the middle end of the support rod is larger than the diameter of the positioning hole. The middle end of the support rod supports between the mounting disc and the support disc, so that a gap for gas to pass through is left between the mounting disc and the support plate. The fork ring is installed on the mounting disc and can rotate coaxially relative to the mounting disc. A plurality of evenly distributed card slots are provided on the inner ring of the fork ring, and each card slot is provided with a fork. The fork shaft on the fork passes through the mounting disc, and the nozzle vane is installed at the bottom of the fork shaft. The nozzle vane is located between the mounting disc and the support disc. The nozzle vane includes an upper nozzle vane and a lower nozzle vane. The lower nozzle vane is connected to the upper nozzle vane through a connecting mechanism. The connecting mechanism pushes the upper end of the upper nozzle vane to keep in contact with the lower end of the mounting disc, and the connecting mechanism pushes the lower end of the lower nozzle vane to keep in contact with the upper end of the support disc.

[0008] Further, the connecting mechanism includes an outer insertion block, an intermediate insertion block, a mounting groove, an upper mounting hole provided at the lower end of the upper nozzle vane, an outer slot, an intermediate slot, a mounting plate, a lower mounting hole provided at the upper end of the lower nozzle vane, and a spring inserted into the lower mounting hole at the lower end. The outer insertion block and the intermediate insertion block are respectively arranged on both sides of the lower end of the upper nozzle vane. The outer insertion block is arranged close to the inner side surface of the upper nozzle vane, and one of its surfaces forms a surface with the inner side surface of the upper nozzle vane. The intermediate block is arranged at the middle position on one side of the lower end of the upper nozzle vane. The mounting groove is arranged at the inner side surface position of the lower end of the upper nozzle vane. The upper mounting hole is arranged at the lower end of the upper nozzle vane behind the mounting groove. The outer slot corresponds to the position of the outer insertion block at the position of the lower nozzle insert, and the outer insertion block is inserted into the outer slot. The intermediate insertion block corresponds to the position of the intermediate insertion block at the position of the lower nozzle insert, and the intermediate insertion block is inserted into the intermediate slot. And the mounting plate corresponds to the position of the mounting groove at the position of the lower nozzle insert, and the mounting plate is installed in cooperation with the mounting groove. The lower mounting hole corresponds to the position of the upper mounting hole at the position of the lower nozzle insert. The upper end of the spring is inserted into the upper mounting hole. Through the above structural arrangement, the lower nozzle vane can only move up and down relative to the upper nozzle vane. At the same time, under the elastic force of the spring in the compressed state, it is respectively in contact with the mounting disc and the support disc. The connection position of the upper nozzle vane and the lower nozzle vane forms a relatively complete and integral nozzle vane through the cooperation of the mounting plate and the mounting groove. The inner side surface of the outer insertion block is in contact with the outer side surface of the lower nozzle vane, which can reduce the gas passing through the gap between the mounting groove and the mounting plate (the outer insertion block blocks the end of the gap).

[0009] Further, concave mounting portions are provided on both sides of the upper end of the upper nozzle vane. The upper end of the upper nozzle vane is in clearance fit with the lower end opening of the fork shaft of the fork. Limit screws are installed in the threaded holes on both sides of the lower end opening of the fork shaft. The limit screws are inserted into the concave mounting portions, and there is a gap between the end portions of the limit screws and the concave mounting portions. This design enables the upper nozzle vane to move a small distance relative to the fork shaft of the fork.

[0010] Further, a clamping block integrally connected to the fork ring is provided at the bottom of the clamping groove. A pressing block cooperating with the clamping groove is provided on the fork. The pressing block is located 1-2 mm above the clamping block, restricting the fork ring between the pressing block and the mounting disc.

[0011] Further, there is a gap of 1-2 mm between the limit screw and the upper end face of the concave mounting portion, which can prevent the fork from moving up too much, and then the pressing block from disengaging from the clamping groove, thus losing control of the fork ring.

[0012] In summary, the present invention has the following beneficial effects:

[0013] 1. In the present invention, the nozzle vanes are arranged in upper and lower parts, and the two are connected into a whole through a connecting mechanism. At the same time, the connecting mechanism pushes the upper and lower nozzle vanes to fit with the bottom end of the mounting disc and the upper end of the support disc. When the temperature changes, the dimensional changes at the upper and lower ends of the nozzle vanes are adjusted by the adjusting mechanism to ensure that the upper and lower ends of the nozzle vanes always fit with the bottom end of the mounting disc and the upper end of the support disc, thereby improving the efficiency of the turbine;

[0014] 2. By providing a pressing block at the end of the fork and a clamping block integrally connected to the fork ring at the bottom of the clamping groove, the structure of the pressing block and the clamping block replaces the roller structure that needs to be additionally installed in the prior art, simplifies the mechanism of the nozzle ring, and improves the working reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a perspective view of the present invention;

[0016] Figure 2 is a top view of the present invention;

[0017] Figure 3 is Figure 2 the sectional view taken along A-A in

[0018] Figure 4 is a bottom view of the mounting disc of the present invention;

[0019] Figure 5 is the exploded structural schematic Figure 1 ;

[0020] Figure 6 is the exploded structural schematic Figure 2 ;

[0021] Figure 7 It is a schematic structural diagram of the upper nozzle vane of the present invention;

[0022] Figure 8 It is a schematic structural diagram of the fork part of the present invention

[0023] Figure 9 It is a schematic assembly structural diagram of the nozzle vane of the present invention.

[0024] In the figure, 1. mounting disc; 2. support disc; 3. fork ring; 4. fork; 5. nozzle vane; 5a. upper nozzle vane; 5b. lower nozzle vane; 6. support rod; 7. connecting hole; 8. connecting screw; 9. card slot; 10. concave mounting part; 11. outer plug; 12. intermediate plug 13. outer slot; 14. intermediate slot; 15. mounting plate; 16. lower mounting hole; 17. spring; 18. mounting groove; 19. upper mounting hole; 20. pressing block; 21. limit screw. Detailed implementation mode

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] As Figures 1-4 shown, an adjustable turbine increasing nozzle ring structure includes a mounting disc 1, a support disc 2, a fork ring 3, a fork 4 and a nozzle vane 5 mounted on the fork 4. A connecting hole 7 is provided on the mounting disc 1, and a threaded hole is provided on the support disc 2 at a position corresponding to the connecting hole 7. The connecting screw 8 passes through the connecting hole 7 and cooperates with the threaded hole to connect and fix the two. A support rod 6 is installed between the mounting disc 1 and the support disc 2. Both ends of the support rod 6 are respectively inserted into the positioning holes on the mounting disc 1 and the support disc 2. The diameter of the middle end of the support rod 6 is larger than the diameter of the positioning hole. The middle end of the support rod 6 supports between the mounting disc 1 and the support disc 2, so that a gap for gas passage is left between the mounting disc 1 and the support plate 2. The fork ring 3 is installed on the mounting disc 1 and can rotate coaxially relative to the mounting disc 1. A plurality of evenly distributed card slots 9 are provided on the inner ring of the fork ring 3, and each card slot 9 is provided with a fork 4. The fork shaft on the fork 4 passes through the mounting disc 1, and the bottom of the fork shaft is installed with a nozzle vane 5. The nozzle vane 5 is located between the mounting disc 1 and the support disc 2. As Figures 5-7 shown, the nozzle vane 5 includes an upper nozzle vane 51a and a lower nozzle vane 51b. The lower nozzle vane 51b is connected to the upper nozzle vane 51a through a connecting mechanism. The connecting mechanism pushes the upper end of the upper nozzle vane 51a to keep it in contact with the lower end of the mounting disc 1, and the connecting mechanism pushes the lower end of the lower nozzle vane 51b to keep it in contact with the upper end of the support disc 2.

[0027] Further, as Figure 8As shown, the connecting mechanism includes an outer insertion block 11, an intermediate insertion block 12, an installation groove 18, an upper installation hole 19 provided at the lower end of the upper nozzle vane 5a, and an outer slot 13, an intermediate slot 14, an installation plate 15, a lower installation hole 16, and a spring 17 inserted into the lower installation hole 16 at the upper end of the lower nozzle vane 5b. The outer insertion block 11 and the intermediate insertion block 12 are respectively arranged on both sides of the lower end of the upper nozzle vane 5a. The outer insertion block 11 is arranged close to the inner side of the upper nozzle vane 5a, and one of its surfaces forms a surface with the inner side of the upper nozzle vane 5a. The intermediate block 12 is arranged at the middle position on one side of the lower end of the upper nozzle vane 5a. The installation groove 18 is arranged at the inner side position of the lower end of the upper nozzle vane 5a. The upper installation hole 19 is arranged at the lower end of the upper nozzle vane 5a behind the installation groove 18. The position of the outer slot 13 on the lower nozzle insert 5b corresponds to the position of the outer insertion block 11, and the outer insertion block 11 is inserted into the outer slot 13. The position of the intermediate insertion block 12 on the lower nozzle insert 5b corresponds to the position of the intermediate insertion block 12, and the intermediate insertion block 12 is inserted into the intermediate slot 14. The position of the installation plate 15 on the lower nozzle insert 5b corresponds to the position of the installation groove 18, and the installation plate 15 is installed in cooperation with the installation groove 18. The position of the lower installation hole 16 on the lower nozzle insert 5b corresponds to the position of the upper installation hole 19. The upper end of the spring 17 is inserted into the upper installation hole 19. Through the above structural settings, the lower nozzle vane 5b can only move up and down relative to the upper nozzle vane 5a. At the same time, under the elastic force of the spring 17 in the compressed state, it is respectively in contact with the installation disc 1 and the support disc 2. At the connection position of the upper nozzle vane 5a and the lower nozzle vane 5b, through the cooperation of the installation plate 15 and the installation groove 18, a relatively complete and integral nozzle vane 5 is formed. The inner side surface of the outer insertion block 11 is in contact with the outer side surface of the lower nozzle vane 5 (in the fully closed state), which can reduce the passage of gas along the gap between the installation groove 18 and the installation plate 15 (the outer insertion block 11 blocks the end of the gap).

[0028] Further, as Figure 7 and Figure 9 shown, concave installation parts 10 are provided on both sides of the upper end of the upper nozzle vane 5a. The upper end of the upper nozzle vane 5a has a clearance fit with the lower end opening of the fork shaft of the fork 4. Limit screws 21 are installed in the threaded holes on both sides of the lower end opening of the fork shaft. The limit screws 21 are inserted into the concave installation parts 10, and there is a gap between the end of the limit screw 21 and the concave installation parts 10. This design allows the upper nozzle vane 5a to move a small distance relative to the fork shaft of the fork 4.

[0029] Further, a clamping block integrally connected with the fork ring 3 is provided at the bottom of the clamping groove 9. A pressing block 20 cooperating with the clamping groove 9 is provided on the fork 4. The pressing block 20 is 1-2 mm above the clamping block, restricting the fork ring 3 between the pressing block 20 and the installation disc 1.

[0030] Furthermore, there is a spacing of 1 - 2 mm between the limit screw 21 and the upper end surface of the concave mounting portion 10, which can prevent the fork 4 from rising too much, and further prevent the pressure block 20 from disengaging from the card slot 9, thus losing control of the fork ring 3.

[0031] Working principle: In the present invention, the nozzle vane is arranged in two parts, upper and lower, and the two are connected into a whole through a connecting mechanism. At the same time, the connecting mechanism pushes the upper and lower nozzle vanes to fit with the bottom end of the mounting disc and the upper end of the support disc. When the temperature changes, the dimensional changes at the upper and lower ends of the nozzle vane are adjusted by the adjusting mechanism to ensure that the upper and lower ends of the nozzle vane always fit with the bottom end of the mounting disc and the upper end of the support disc, thereby improving the efficiency of the turbine. By arranging a pressure block at the end of the fork and a block integrated with the fork ring at the bottom of the card slot, the structure of the pressure block and the block replaces the roller structure that needs to be additionally installed in the prior art, simplifies the structure of the nozzle ring, and improves the working reliability.

[0032] This specific embodiment is only an interpretation of the present invention and does not limit the present invention. After reading this specification, those skilled in the art can make modifications to this embodiment without creative contributions as needed, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. An adjustable turbine nozzle ring structure, comprising a mounting disc (1), a support disc (2), a fork ring (3), a fork (4) and nozzle vanes (5) mounted on the fork (4). A connecting hole (7) is provided on the mounting disc (1), and a threaded hole is provided on the support disc (2) at a position corresponding to the connecting hole (7). The two are connected and fixed by a connecting screw (8) passing through the connecting hole (7) and mating with the threaded hole. A support rod (6) is installed between the mounting disc (1) and the support disc (2). The two ends of the support rod (6) are respectively inserted into the positioning holes on the mounting disc (1) and the support disc (2), and the middle end of the support rod (6) is supported between the mounting disc (1) and the support disc (2). The fork ring (3) is installed on the mounting disc (1) and can rotate coaxially relative to the mounting disc (1). A plurality of evenly distributed card slots (9) are provided on the inner ring of the fork ring (3), and each card slot (9) is internally fitted with a fork (4). The fork shaft on the fork (4) passes through the mounting disc (1), and the bottom of the fork shaft is installed with a nozzle vane (5). The nozzle vane (5) is located between the mounting disc (1) and the support disc (2). It is characterized in that: The nozzle vane (5) includes an upper nozzle vane (51a) and a lower nozzle vane (51b). The lower nozzle vane (51b) is connected to the upper nozzle vane (51a) through a connecting mechanism. The connecting mechanism pushes the upper end of the upper nozzle vane (51a) to keep it in contact with the lower end of the mounting disc (1), and the connecting mechanism pushes the lower end of the lower nozzle vane (51b) to keep it in contact with the upper end of the support disc (2). The connecting mechanism includes an outer insertion block (11), an intermediate insertion block (12), a mounting groove (18), an upper mounting hole (19) provided at the lower end of the upper nozzle vane (5a), and an outer slot (13), an intermediate slot (14), a mounting plate (15), a lower mounting hole (16), and a spring (17) with its lower end inserted into the lower mounting hole (16) provided at the upper end of the lower nozzle vane (5b). The outer insertion block (11) and the intermediate insertion block (12) are respectively arranged on both sides of the lower end of the upper nozzle vane (5a). The outer insertion block (11) is arranged near the inner side of the upper nozzle vane (5a), and one of its surfaces forms a surface with the inner side of the upper nozzle vane (5a). The intermediate block (12) is arranged at the middle position on one side of the lower end of the upper nozzle vane (5a). The mounting groove (18) is arranged at the inner side position of the lower end of the upper nozzle vane (5a). The upper mounting hole (19) is arranged at the lower end of the upper nozzle vane (5a) behind the mounting groove (18). The position of the outer slot (13) on the lower nozzle insert (5b) corresponds to the position of the outer insertion block (11), and the outer insertion block (11) is inserted into the outer slot (13). The position of the intermediate insertion block (12) on the lower nozzle insert (5b) corresponds to the position of the intermediate insertion block (12), and the intermediate insertion block (12) is inserted into the intermediate slot (14). And the position of the mounting plate (15) on the lower nozzle insert (5b) corresponds to the position of the mounting groove (18), and the mounting plate (15) is installed in cooperation with the mounting groove (18). The position of the lower mounting hole (16) on the lower nozzle insert (5b) corresponds to the position of the upper mounting hole (19), and the upper end of the spring (17) is inserted into the upper mounting hole (19).

2. The adjustable turbine increasing nozzle ring structure according to claim 1, characterized in that: Both sides of the upper end of the upper nozzle vane (5a) are provided with concave mounting parts (10). The upper end of the upper nozzle vane (5a) has a clearance fit with the lower end opening of the fork shaft of the fork (4). Limit screws (21) are installed in the threaded holes on both sides of the lower end opening of the fork shaft. The limit screws (21) are inserted into the concave mounting parts (10), and there is a distance between the ends of the limit screws (21) and the concave mounting parts (10).

3. The adjustable turbine increasing nozzle ring structure according to claim 2, characterized in that: The bottom of the card slot (9) is provided with a card block integrally connected with the fork ring (3). The fork (4) is provided with a pressing block (20) that cooperates with the card slot (9). The pressing block (20) is 1 - 2 mm above the card block, restricting the fork ring (3) between the pressing block (20) and the mounting disc (1).

4. An adjustable turbine increasing nozzle ring structure according to claim 3, characterized in that: a distance of 1-2 mm is left between the limit screw (21) and the upper end surface of the concave mounting portion (10).

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