Tapered variable nozzle assembly of turbocharger

Abstract

The utility model relates to the technical field of turbochargers, and discloses a turbocharger conical variable nozzle assembly which comprises an upper disc body, a connecting column is fixedly installed at the front end of the upper disc body, a lower disc body is fixedly installed at the rear end of the upper disc body through the connecting column, a shifting ring is movably installed on the outer ring of the front end of the upper disc body, and a conical variable nozzle is arranged on the shifting ring. Penetrating holes are formed in the center of the upper disc body and the center of the lower disc body, a clamping groove is formed in the inner wall of the shifting ring, a variable assembly is arranged at the front end of the upper disc body and comprises a first shifting fork movably installed on the surface of the front end of the upper disc body, and a round matching head is fixedly installed on the side, facing the shifting ring, of the first shifting fork; and by installing devices such as a shifting ring, a clamping groove, a first shifting fork, a circular matching head, a first blade, a bearing and a limiting rod, the beneficial effects that the stability between parts is high, the situation that the movement stability of the parts is reduced due to long-time use is avoided, and the control precision is good are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of turbochargers, in particular to a conical variable nozzle assembly of a turbocharger. Background Art

[0002] The turbocharger uses the exhaust gas of the internal combustion engine to drive the turbine to do work, increase the intake pressure of the internal combustion engine, thereby increasing the power of the internal combustion engine and reducing fuel consumption and exhaust pollution. The turbocharger is actually an air compressor that increases the intake volume by compressing air. It uses the inertial impact of the exhaust gas discharged by the engine to drive the turbine in the turbocharger chamber. The turbine drives the coaxial impeller, which presses the air sent from the air filter pipe to pressurize it into the cylinder.

[0003] The internal components of the turbocharger include a variable nozzle assembly, which is used to improve the early intervention of the turbocharger at low engine speeds. Due to the structural characteristics of the variable nozzle, there must be many movable parts, which may cause the stability of the parts of the variable nozzle assembly to deviate after long-term use, reducing the reliability of the assembly and causing poor control accuracy.

[0004] Therefore, a turbocharger conical variable nozzle assembly is specifically proposed. Summary of the invention

[0005] In view of the deficiencies in the prior art, the utility model provides a turbocharger conical variable nozzle assembly, which has strong stability between parts, avoids the stability of part movement being reduced due to long-term use, has the advantage of good control accuracy, and solves the problem that the stability of parts may deviate after long-term use.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a turbocharger conical variable nozzle assembly, comprising an upper disc, a connecting column is fixedly installed at the front end of the upper disc, a lower disc is fixedly installed at the rear end of the upper disc through the connecting column, a toggle ring is movably installed at the front end outer ring of the upper disc, and a through hole is opened at the center of the upper disc and the lower disc;

[0007] A slot is provided on the inner wall of the shift ring, and a variable component is provided at the front end of the upper disk body. The variable component includes a first shift fork movably mounted on the front end surface of the upper disk body, a circular mating head is fixedly mounted on the first shift fork facing the shift ring side, a first connecting rod is fixedly mounted on the rear end of the first shift fork, a first blade is fixedly mounted on the rear end of the first connecting rod, a bearing is movably mounted on the front end of the first blade close to the lower disk body, and a limiting rod is movably mounted on the surface of the bearing.

[0008] Preferably, there are eight groups of the slots, the circular mating heads are located in the slots, the first linkage rod passes through the upper disk and is connected to the first blade, and the first blade is located at the rear end of the lower disk.

[0009] Preferably, there are eight groups of the slots, the circular mating heads are located in the slots, the first linkage rod passes through the upper disk and is connected to the first blade, and the first blade is located at the rear end of the lower disk.

[0010] Preferably, the first shift fork and the second shift fork rotate with the first connecting rod and the second connecting rod as the center points respectively, and the first connecting rod and the second connecting rod are in active relationship with the upper disk body and the lower disk body.

[0011] Preferably, when the first blade and the second blade rotate, the limiting rod is displaced accordingly, and the limiting rod will not touch the first connecting rod when displaced.

[0012] Preferably, the variable components are provided in four groups, and the four groups of variable components are arranged in a circular array with the perforation as the center point.

[0013] Preferably, a limiting groove is provided on the rear end surface of the lower disk, and the limiting rod is located in the limiting groove.

[0014] Preferably, when the first blade and the second blade rotate, the limiting rod is driven to move, and the limiting groove limits the displacement amplitude of the limiting rod.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. This turbocharger conical variable nozzle assembly, by installing a toggle ring, a slot, a first fork, a circular mating head, a first blade, a bearing, a limiting rod and other devices, has the advantages of strong stability between parts, avoiding the stability of part movement being reduced due to long-term use, and having good control accuracy.

[0017] 2. This turbocharger conical variable nozzle assembly has a limit groove set on the lower disk body. The limit groove plays a role of limiting the limit rod, and the limit rod plays a role of assisting the synchronization of the first blade and the second blade. The opening of the limit groove can indirectly limit the first blade and the second blade, limit the angle of the first blade and the second blade after rotation, and further improve the stability of the movement of the parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 Schematic diagram of the front structure of the variable spray component nozzle of the present invention;

[0020] Figure 2 Schematic diagram of the reverse structure of the variable spray component nozzle of the present invention;

[0021] Figure 3 Schematic diagram of the enlarged detailed structure at position B of the present invention;

[0022] Figure 4 Schematic diagram of the variable component structure of the present invention;

[0023] Figure 5 Schematic diagram of the enlarged detailed structure at position A of the present invention.

[0024] Explanation of reference numerals:

[0025] 1. Dialing ring; 11. Card slot; 12. Connecting column; 2. Variable component; 21. First fork; 22. Circular fitting head; 23. First linkage rod; 24. First blade; 25. Second fork; 26. Second linkage rod; 27. Second blade; 28. Bearing; 29. Limiting rod; 3. Upper disc body; 4. Lower disc body; 41. Limiting groove; 5. Perforation. Specific embodiments

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0027] Please refer to Figures 1 to 5 , the present invention provides a technical solution:

[0028] A conical variable nozzle assembly for a turbocharger, comprising an upper disk body 3. A connecting column 12 is fixedly installed at the front end of the upper disk body 3. A lower disk body 4 is fixedly installed at the rear end of the upper disk body 3 through the connecting column 12. A toggle ring 1 is movably installed on the outer circle at the front end of the upper disk body 3. Through holes 5 are formed at the centers of both the upper disk body 3 and the lower disk body 4. A clamping groove 11 is formed on the inner wall of the toggle ring 1. A variable component 2 is arranged at the front end of the upper disk body 3. The variable component 2 includes a first fork 21 movably installed on the front surface of the upper disk body 3. A circular fitting head 22 is fixedly installed on the side of the first fork 21 facing the toggle ring 1. A first linkage rod 23 is fixedly installed at the rear end of the first fork 21. A first blade 24 is fixedly installed at the rear end of the first linkage rod 23. A bearing 28 is movably installed on the side of the front end of the first blade 24 close to the lower disk body 4. A limiting rod 29 is movably installed on the surface of the bearing 28.

[0029] Eight groups of the clamping grooves 11 are formed. The circular fitting head 22 is located in the clamping groove 11. The first linkage rod 23 passes through the upper disk body 3 and is connected to the first blade 24. The first blade 24 is located at the rear end of the lower disk body 4. The variable component 2 further includes a second fork 25 movably installed at the front end of the upper disk body 3. A second linkage rod 26 is fixedly installed at the rear end of the second fork 25. A second blade 27 is fixedly installed at the rear end of the second linkage rod 26. A bearing 28 is also movably installed on the side of the front end of the second blade 27 close to the lower disk body 4. The other end of the limiting rod 29 is movably installed on the bearing 28 at the front end of the second blade 27. The first fork 21 and the second fork 25 rotate respectively with the first linkage rod 23 and the second linkage rod 26 as the center points. The first linkage rod 23 and the second linkage rod 26 are in an active relationship with the upper disk body 3 and the lower disk body 4. When the first blade 24 and the second blade 27 rotate, the limiting rod 29 moves accordingly. When the limiting rod 29 moves, it will not touch the first linkage rod 23.

[0030] By adopting the above technical solution, when the toggle ring 1 is used, the toggle ring 1 drives the first fork 21 and the second fork 25 to rotate with the first connecting rod 23 and the second connecting rod 26 as the center point through the card slot 11, and the circular mating heads 22 on the sides of the first fork 21 and the second fork 25 are inserted into the card slot 11, thereby ensuring that the toggle ring 1 can drive the first fork 21 and the second fork 25 to rotate when rotating, and when the first fork 21 and the second fork 25 rotate, they will inevitably drive the first connecting rod 23 and the second connecting rod 26 to rotate. When the first linkage rod 23 and the second linkage rod 26 rotate, the first blade 24 and the second blade 27 at the rear end of the lower disk body 4 will be driven to rotate. The first blade 24 and the second blade 27 also rotate with the first linkage rod 23 and the second linkage rod 26 as the center point. When the first blade 24 and the second blade 27 rotate to the maximum angle, the end of the first blade 24 that is not connected to the limiting rod 29 and the end of the second blade 27 that is not connected to the limiting rod 29 are both facing the through hole 5. When the first blade 24 and the second blade 27 rotate to the minimum angle, the first blade 2 The end of the first blade 24 that is not connected to the limiting rod 29 is in contact with the end of the second blade 27 that is connected to the limiting rod 29. By installing the limiting rod 29 on the first blade 24 and the second blade 27, the first blade 24 and the second blade 27 can rotate synchronously. When the first blade 24 rotates, the second blade 27 will inevitably be driven to rotate through the limiting rod 29. Conversely, when the second blade 27 rotates, the first blade 24 will also be driven to rotate. This greatly improves the synchronization and stability of the first blade 24 and the second blade 27 when rotating, and avoids the first blade 24 and the second blade 27 from rotating synchronously. The stability of the second blade 27 decreases after working for a long time, and its accuracy is improved. At the same time, the first blade 24, the first connecting rod 23, and the first fork 21 are fixedly connected, and the second blade 27, the second connecting rod 26, and the second fork 25 are also fixedly connected. The circular matching heads 22 of the first fork 21 and the second fork 25 are both inserted into the slot 11 of the toggle ring 1. The toggle ring 1 and the slot 11 can also ensure that the first blade 24 and the second blade 27 can move simultaneously, and the connecting column 12 serves to strengthen the stability of the installation of the upper disk body 3 and the lower disk body 4.

[0031] Specifically, Figures 2 to 5 As shown, the variable components 2 are provided with four groups, and the four groups of variable components 2 are arranged in a circular array with the through hole 5 as the center point. The rear end surface of the lower disk body 4 is provided with a limiting groove 41, and the limiting rod 29 is located in the limiting groove 41. When the first blade 24 and the second blade 27 rotate, the limiting rod 29 is driven to move, and the limiting groove 41 limits the displacement amplitude of the limiting rod 29.

[0032] By adopting the above technical solution, both the first blade 24 and the second blade 27 are located at the rear end of the lower disc body 4 and are annularly arrayed with the perforation 5 as the center point. A limiting groove 41 is formed on the rear end surface of the lower disc body 4. A limiting rod 29 connected between the first blade 24 and the second fork 25 through a bearing 28 is located in the limiting groove 41. When the first blade 24 and the second blade 27 rotate, the limiting rod 29 moves accordingly. The displacement of the limiting rod 29 is completed entirely within the limiting groove 41 during the displacement process. The limiting groove 41 functions to limit the limiting rod 29, and the limiting rod 29 serves to assist the first blade 24 and the second blade 27 to be synchronous. By providing the limiting groove 41, the first blade 24 and the second blade 27 can be indirectly restricted, and the angles of the first blade 24 and the second blade 27 after rotation can be limited, further improving the stability of the movement of the parts. When the first blade 24 and the second blade 27 rotate to the maximum angle, the ends of the first blade 24 and the second blade 27 that are not connected to the limiting rod 29 both face the perforation 5. When the first blade 24 and the second blade 27 rotate to the minimum angle, the end of the first blade 24 that is not connected to the limiting rod 29 and the end of the second blade 27 that is connected to the limiting rod 29 are in contact with each other. During this process, the limiting rod 29 is always located in the limiting groove 41. When the first blade 24 and the second blade 27 rotate to the maximum and minimum angles, the limiting rod 29 is in a state of being in contact with the side wall of the limiting groove 41, improving the stability of the operation of the parts.

[0033] Working principle: When in use, the driving toggle ring 1 rotates. When the toggle ring 1 rotates, it drives the first fork 21 and the second fork 25 to rotate around the first linkage rod 23 and the second linkage rod 26 through the card slots 11. The first blade 24 and the second blade 27 are driven by the first linkage rod 23 and the second linkage rod 26 to rotate. When the first blade 24 and the second blade 27 rotate, they drive the limiting rod 29 to move. The limiting rod 29 functions to limit the first blade 24 and the second blade 27 and can improve the working stability of the first blade 24 and the second blade 27. At the same time, the limiting rod 29 is located in the limiting groove 41, and the limiting groove 41 restricts the displacement amplitude of the limiting rod 29, further improving the operating stability of the device.

[0034] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A conical variable nozzle assembly for a turbocharger, comprising an upper disc body (3), characterized in that: A connecting column (12) is fixedly mounted on the front end of the upper disk body (3), a lower disk body (4) is fixedly mounted on the rear end of the upper disk body (3) via the connecting column (12), a toggle ring (1) is movably mounted on the front end outer ring of the upper disk body (3), and a through hole (5) is provided at the center of each of the upper disk body (3) and the lower disk body (4); The inner wall of the shifting ring (1) is provided with a slot (11); the front end of the upper disk body (3) is provided with a variable component (2); the variable component (2) comprises a first shift fork (21) movably mounted on the front end surface of the upper disk body (3); a circular mating head (22) is fixedly mounted on the side of the first shift fork (21) facing the shifting ring (1); a first connecting rod (23) is fixedly mounted on the rear end of the first shift fork (21); a first blade (24) is fixedly mounted on the rear end of the first connecting rod (23); a bearing (28) is movably mounted on the front end of the first blade (24) near the lower disk body (4); a limiting rod (29) is movably mounted on the surface of the bearing (28).

2. The conical variable nozzle assembly of a turbocharger according to claim 1, wherein: The clamping grooves (11) are provided with eight groups in total. The circular mating heads (22) are located in the clamping grooves (11). The first linkage rod (23) passes through the upper disk body (3) and is connected to the first blade (24). The first blade (24) is located at the rear end of the lower disk body (4).

3. A conical variable nozzle assembly of a turbocharger according to claim 2, characterized in that: The variable component (2) further comprises a second shift fork (25) movably mounted on the front end of the upper disk body (3); a second connecting rod (26) is fixedly mounted on the rear end of the second shift fork (25); a second blade (27) is fixedly mounted on the rear end of the second connecting rod (26); a bearing (28) is also movably mounted on the side of the front end of the second blade (27) close to the lower disk body (4); and the other end of the limiting rod (29) is movably mounted on the bearing (28) at the front end of the second blade (27).

4. A conical variable nozzle assembly of a turbocharger according to claim 3, characterized in that: The first shift fork (21) and the second shift fork (25) rotate with the first connecting rod (23) and the second connecting rod (26) as the center of the circle respectively, and the first connecting rod (23) and the second connecting rod (26) are in a movable relationship with the upper disk body (3) and the lower disk body (4).

5. A conical variable nozzle assembly of a turbocharger according to claim 3, characterized in that: When the first blade (24) and the second blade (27) rotate, the limiting rod (29) is displaced accordingly, and the limiting rod (29) will not touch the first linkage rod (23) when displaced.

6. The conical variable nozzle assembly of a turbocharger according to claim 1, wherein: The variable components (2) are provided in four groups, and the four groups of variable components (2) are arranged in a circular array with the through hole (5) as the center point.

7. A conical variable nozzle assembly of a turbocharger according to claim 3, characterized in that: A limiting groove (41) is provided on the rear end surface of the lower plate (4), and the limiting rod (29) is located in the limiting groove (41).

8. A conical variable nozzle assembly of a turbocharger according to claim 7, characterized in that: When the first blade (24) and the second blade (27) rotate, the limiting rod (29) is driven to move, and the limiting groove (41) limits the displacement amplitude of the limiting rod (29).

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