CN210484209U

CN210484209U - Assembling and disassembling structure for locking nut of turbocharger core

Info

Publication number: CN210484209U
Application number: CN201921550343.XU
Authority: CN
Inventors: 佘勉
Original assignee: Wuxi Spepelier Technology Co Ltd
Current assignee: Wuxi Spepelier Technology Co Ltd
Priority date: 2019-09-18
Filing date: 2019-09-18
Publication date: 2020-05-08
Anticipated expiration: 2029-09-18

Abstract

The utility model relates to a lock nut dismounting structure of a turbocharger core, which comprises a turbine shaft, an impeller and a lock nut; the turbine shaft vertically penetrates through the center of the impeller; the locking nut is arranged close to the end face of the nose of the impeller; the locking nut is connected with the turbine shaft through threads; the locking nut detachably fixes the impeller on the turbine shaft; the turbine shaft is provided with a clamping part for fixing the turbine shaft; one end of the turbine shaft close to the impeller is a turbine shaft impeller end; the clamping part is positioned on a connecting line from the locking nut to the turbine shaft impeller end. Adopt the utility model provides a turbo charger core lock nut dismouting structure lock nut's dismantlement and installation can only go on at the impeller homonymy, has accelerated the dismouting efficiency and the dynamic balance impeller angular adjustment efficiency of core greatly to operating space is big, does not receive the volute structure restriction, and easy operation is convenient, reduces the production bottleneck that the core dynamic balance produced, accelerates the output of core and complete machine.

Description

Assembling and disassembling structure for locking nut of turbocharger core

Technical Field

The utility model relates to a turbo charger field especially relates to a turbo charger core lock nut dismouting structure.

Background

In the prior art, a locking nut dismounting structure of a turbocharger core is characterized in that a thin shaft rod of a turbine shaft penetrates through a middle hole of an impeller, then the locking nut is screwed into the thin shaft rod of the turbine shaft, and the impeller is pressed tightly to form a rotor capable of rotating simultaneously. When the machine core is balanced, the turbine end of the turbine shaft is connected with the volute, high-pressure air is blown into the volute to enable the turbine to drive the impeller to rotate at a high speed, and in order to enable the dynamic balance of the rotor to reach the optimal state, the locking nut is required to be loosened frequently so as to readjust the angle of the impeller. At the moment, the sleeve is required to be deeply inserted into the volute and sleeved on the hexagonal protrusion at the turbine end of the turbine shaft, so that the turbine shaft is locked, then the locking nut is unscrewed by adopting a special tool, finally the angle of the impeller is readjusted, then the locking nut is screwed, and the dynamic balance test of the rotor is carried out again until the dynamic balance of the rotor reaches the optimal state. When the structure is adopted to tighten or loosen the locking nut, the operation is very inconvenient, and the working efficiency is low. Some volute structures still can make the sleeve can't reach the turbine, just need tear the core down the operation, then install again, and is inefficient, and it is serious inconvenient to operate for core dynamic balance becomes a very big production bottleneck, causes the output rate not high.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a simple structure, turbo charger core lock nut dismouting structure that simple operation, work efficiency are high, the utility model provides a technical scheme does:

the utility model provides a lock nut dismounting structure of a turbocharger core, which comprises a turbine shaft, an impeller and a lock nut; the turbine shaft vertically penetrates through the center of the impeller; the locking nut is arranged close to the end face of the nose of the impeller; the locking nut is connected with the turbine shaft through threads; the locking nut detachably fixes the impeller on the turbine shaft; the turbine shaft is provided with a clamping part for fixing the turbine shaft; one end of the turbine shaft close to the impeller is a turbine shaft impeller end; the clamping part is positioned on a connecting line from the locking nut to the turbine shaft impeller end.

The utility model provides a turbo charger core lock nut dismouting structure, preferably, joint portion is located turbine shaft wheel end.

The utility model provides a lock nut dismounting structure of a turbocharger core, preferably, the clamping part is an inner hexagonal groove; the center of the inner hexagonal groove is positioned on the axis of the turbine shaft; the diameter of the circumscribed circle of the inner hexagonal groove is smaller than the diameter of the turbine shaft impeller end.

The utility model provides a turbo charger core lock nut dismouting structure, preferably, joint portion is the spline groove.

The utility model provides a lock nut dismounting structure of a turbocharger movement, preferably, the clamping part is a positive multi-shape bulge; the diameter of the circumscribed circle of the regular polygon bulge is smaller than the inner diameter of the locking nut.

The utility model provides a lock nut dismounting structure of a turbocharger movement, preferably, the clamping part is positioned on the shaft body of the turbine shaft; the clamping portion is a flat key groove.

The utility model provides a turbo charger core lock nut dismouting structure, preferably, lock nut is nylon ring lock nut.

The utility model has the advantages of or beneficial effect:

the utility model provides a turbo charger core lock nut dismouting structure through set up joint portion in the line region by lock nut to turbine shaft wheel end, has replaced the hexagon that is located turbine shaft wheel end of traditional turbo charger core lock nut dismouting structure protruding, has realized the function of locking turbine shaft. The locking nut and the clamping portion are located on the same side of the impeller, so that the locking nut can be disassembled and assembled only on one side of the impeller, a sleeve does not need to be used for penetrating from the volute and sleeved on the hexagonal boss of the turbine to limit rotation of the turbine shaft, the clamping portion is fixed by directly adopting a tool matched with the clamping portion, the purpose of limiting rotation of the turbine shaft is achieved, and then the locking nut rotates relative to the turbine shaft to unscrew or screw the locking nut. Adopt the utility model provides a turbo charger core lock nut dismouting structure lock nut's dismantlement and installation can only go on at the impeller homonymy, has accelerated the dismouting efficiency and the dynamic balance impeller angular adjustment efficiency of core greatly to operating space is big, does not receive the volute structure restriction, and easy operation is convenient, reduces the production bottleneck that the core dynamic balance produced, accelerates the output of core and complete machine.

Drawings

The invention and its features, aspects and advantages will become more apparent from a reading of the following detailed description of non-limiting embodiments with reference to the attached drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not intended to be drawn to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic perspective view of a structure for dismounting and mounting a lock nut of a turbocharger movement according to embodiment 1 of the present invention;

fig. 2 is a schematic view of a turbine end view of a turbocharger cartridge lock nut dismounting structure according to embodiment 1 of the present invention;

FIG. 3 is a partial sectional view in the direction A-A of FIG. 2 (wherein the area encircled by a chain line is a sectional area);

fig. 4 is an enlarged view of region C of fig. 1.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

Example 1

In the prior art, a locking nut dismounting structure of a turbocharger core is characterized in that a thin shaft rod of a turbine shaft penetrates through a middle hole of an impeller, and then the locking nut is screwed into the thin shaft rod of the turbine shaft to tightly press the impeller to form a rotor capable of rotating simultaneously. When the machine core is balanced, the turbine end of the turbine shaft is connected with the volute, high-pressure air is blown into the volute to enable the turbine to drive the impeller to rotate at a high speed, and in order to enable the dynamic balance of the rotor to reach the optimal state, the locking nut is required to be loosened frequently so as to readjust the angle of the impeller. At the moment, the sleeve is required to be deeply inserted into the volute and sleeved on the hexagonal protrusion at the turbine end of the turbine shaft, so that the turbine shaft is locked, then the locking nut is unscrewed by adopting a special tool, finally the angle of the impeller is readjusted, then the locking nut is screwed, and the dynamic balance test of the rotor is carried out again until the dynamic balance of the rotor reaches the optimal state. When the structure is adopted to tighten or loosen the locking nut, the operation is very inconvenient, and the working efficiency is low. Some volute structures still can make the sleeve can't reach the turbine, just need tear the core down the operation, then install again, and is inefficient, and it is serious inconvenient to operate for core dynamic balance becomes a very big production bottleneck, causes the output rate not high.

In order to solve the above technical problem, the embodiment provides a structure for dismounting and mounting a lock nut of a core of a turbocharger, as shown in fig. 1 to 4, including a turbine shaft 1, an impeller 2 and a lock nut 3; the turbine shaft 1 vertically penetrates through the center of the impeller 2; the locking nut 3 is arranged close to the nose end face 21 of the impeller 2; the locking nut 3 is connected with the turbine shaft 1 through threads; the locking nut 3 detachably fixes the impeller 2 on the turbine shaft 1; the turbine shaft 1 is provided with a clamping part 4 for fixing the turbine shaft 1; one end of the turbine shaft 1 close to the impeller 2 is a turbine shaft impeller end 11; the clamping portion 4 is located on a line from the lock nut 3 to the turbine shaft impeller end 11.

According to the assembling and disassembling structure of the lock nut of the core of the turbocharger provided by the embodiment, the clamping part 4 is arranged in the connecting line region from the lock nut 3 to the turbine shaft impeller end 11, the hexagonal bulge at the turbine shaft impeller end of the traditional assembling and disassembling structure of the lock nut of the core of the turbocharger is replaced, and the function of locking the turbine shaft can be realized. The locking nut 3 and the clamping portion 4 are located on the same side of the impeller 2, so that the locking nut can be disassembled and assembled only on one side of the impeller 2 without a sleeve penetrating from the volute 5 and sleeved on the hexagonal boss of the turbine 6 to limit rotation of the turbine shaft 1, the clamping portion 4 is fixed by directly adopting a tool matched with the clamping portion 4, the purpose of limiting rotation of the turbine shaft 1 is achieved, and then the locking nut 3 rotates relative to the turbine shaft 1 to unscrew or screw the locking nut 3. Adopt the turbo charger core lock nut dismouting structure that this embodiment provided, lock nut 3's dismantlement and installation can only go on at 2 homonymies of impeller, has accelerated the dismouting efficiency of core greatly to operating space is big, does not receive 5 structural restrictions of volute, and easy operation is convenient, accelerates the output of core and complete machine. When the angle of the impeller is readjusted by adopting the assembling and disassembling structure for the lock nut of the machine core of the turbocharger provided by the embodiment, the rotation of the turbine shaft 1 is limited by fixing the clamping part 4 according to the method, then the lock nut 3 is unscrewed, so that the turbine 6 and the impeller 2 rotate by an angle relatively, and then the lock nut 3 is screwed. Because the dynamic balance test of the core and the angle adjustment of the impeller 2 only need to be operated at the impeller end, the test space is large, and the operation is convenient, thereby greatly improving the angle adjustment efficiency of the impeller 2 and reducing the production bottleneck generated by the dynamic balance of the core.

Since the lock nut 3 is usually sleeved into the turbine shaft 1 from the turbine shaft impeller end 11 during the assembling process of the engine core, and the inner side of the lock nut 3 is further provided with threads, in order to reduce the installation interference possibly caused by the arrangement of the clamping portion 4 on the lock nut 3 as much as possible, the clamping portion 4 is preferably located at the turbine shaft impeller end 11 in the assembling and disassembling structure of the lock nut of the engine core of the turbocharger provided by the embodiment. Through setting up joint portion 4 in turbine shaft impeller end 11, be favorable to reducing the setting of joint portion 4 and interfere the installation that lock nut 3 probably caused, improved the efficiency of core equipment and dismantlement.

In order to facilitate the processing of the turbine shaft 1, the structure for dismounting and mounting the lock nut of the core of the turbocharger provided by the embodiment is specifically, as shown in fig. 4, the clamping portion 4 is an inner hexagonal groove; the center of the inner hexagonal groove is positioned on the axis of the turbine shaft 1; the diameter of the circumscribed circle of the inner hexagonal groove is smaller than the diameter of the turbine shaft impeller end 11. According to the assembling and disassembling structure of the locking nut of the turbocharger core, the clamping portion 4 is arranged to be the inner hexagonal groove, batch production can be carried out through processing modes such as stamping or electric spark, the processing is simple and convenient, and the production cost is low; in addition, the inner hexagonal groove does not change the shape of the outer wall of the turbine shaft 1, so that the direct contact between the clamping part 4 and the locking nut 3 is avoided, the installation interference possibly caused by the arrangement of the clamping part 4 on the locking nut 3 is avoided, and the assembly and disassembly efficiency of the machine core is improved; more importantly, the turbine shaft 1 is limited to rotate by the inner hexagonal groove, the turbine shaft 1 can be fixed only by inserting the adaptive inner hexagonal wrench into the inner hexagonal groove, and the turbine shaft fixing device is simple and convenient to operate and high in working efficiency.

Because the core of turbine shaft is high-speed operation in the use, the turbine shaft once takes place the angular deflection, will cause the eccentric wear of turbine shaft, influences the life and the safety in utilization of core, in order to reduce the angular deflection of turbine shaft in the installation, the turbo charger core lock nut dismouting structure that this embodiment provided, preferably, joint portion 4 is the spline groove. The spline grooves have good guidance quality, the turbine shaft 1 is fixed by matching with the splines, the turbine shaft 1 is uniformly stressed in all radial directions, the risk of angular deviation of the turbine shaft 1 is reduced, the eccentric wear risk of the turbine shaft 1 is further reduced, and the service life and the use safety of the machine core are favorably improved; in addition, stress concentration at each part of the spline groove structure is small, the service life is long, and repeated disassembly and assembly of the machine core can be adapted.

In order to provide a clamping structure with a simple structure and convenient processing, the clamping part 4 can also be a regular multi-shape bulge preferably in the assembling and disassembling structure of the locking nut of the turbocharger core provided by the embodiment; the diameter of the circumscribed circle of the regular polygonal protrusion is smaller than the inner diameter of the lock nut 3. The clamping part 4 of the positive multi-shaped protruding structure is simple in structure and can be finished only by cutting the outer surface of the turbine shaft 1 through a machine tool, and compared with the clamping part 4 of the groove shape, the clamping part 4 is lower in processing cost and higher in production efficiency; meanwhile, the sleeve suitable for the groove is matched, so that the turbine shaft 1 can be stably fixed. In addition, since the diameter of the circumscribed circle of the regular polygonal protrusion is smaller than the inner diameter of the lock nut 3, inconvenience is not caused to the installation of the lock nut 3.

By arranging the clamping portion 4 at the turbine shaft impeller end 11, because the spatial position of the turbine shaft impeller end 11 is limited, the action surface which can be provided for an external tool by the clamping portion 4 is small, and the situation that the fixation is unstable can be caused by the action surface, and in order to solve the problem, the assembling and disassembling structure of the lock nut of the machine core of the turbocharger provided by the embodiment is provided, preferably, the clamping portion 4 is positioned on the rod body of the turbine shaft 1; the clamping portion 4 is a flat key groove. Because joint portion 4 is located turbine shaft 1's shaft, the shaft body can provide the range of setting up broad of joint portion 4, and the flat keyway is rectangular form recess, extends along the axial lead direction, and the flat key of collocation adaptation accomplishes turbine shaft 1's fixed, can wrap up turbine shaft 1's shaft body portion, adopts this kind of joint portion 4 structure, and joint portion 4 can provide the effect face of outside instrument bigger, and is fixed more stable. As will be appreciated by those skilled in the art, the specific dimensions of the flat keyway should be designed to meet the operating strength requirements of the turbine shaft 1.

In order to enhance the anti-loosening effect of the lock nut, the lock nut dismounting structure of the turbocharger core provided by the embodiment preferably has the lock nut 3 made of nylon rings. Because the nylon ring is embedded in the locking nut 3, after the locking nut is screwed, the inner hole of the nylon ring is extruded and deformed, and the friction force between the locking nut 3 and the turbine shaft 1 is increased, so that the anti-loosening effect of the locking nut 3 is enhanced.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structural changes made by the contents of the specification and the drawings, or the direct or indirect application in other related technical fields, are included in the same way in the protection scope of the present invention.

Claims

1. A lock nut dismounting structure of a turbocharger movement is characterized by comprising a turbine shaft, an impeller and a lock nut; the turbine shaft vertically penetrates through the center of the impeller; the locking nut is arranged close to the end face of the nose of the impeller; the locking nut is connected with the turbine shaft through threads; the locking nut detachably fixes the impeller on the turbine shaft; the turbine shaft is provided with a clamping part for fixing the turbine shaft; one end of the turbine shaft close to the impeller is a turbine shaft impeller end; the clamping part is positioned on a connecting line from the locking nut to the turbine shaft impeller end.

2. The assembling and disassembling structure for the lock nut of the movement of the turbocharger according to claim 1, wherein the clamping portion is located at the end of the turbine shaft impeller.

3. The assembling and disassembling structure of the locking nut of the turbocharger core according to claim 2, wherein the clamping portion is an inner hexagonal groove; the center of the inner hexagonal groove is positioned on the axis of the turbine shaft; the diameter of the circumscribed circle of the inner hexagonal groove is smaller than the diameter of the turbine shaft impeller end.

4. The assembling and disassembling structure for the locking nut of the turbocharger core according to claim 2, wherein the clamping portion is a spline groove.

5. The assembling and disassembling structure of the locking nut of the turbocharger core according to claim 2, wherein the clamping portion is a regular polygon protrusion; the diameter of the circumscribed circle of the regular polygon bulge is smaller than the inner diameter of the locking nut.

6. The assembling and disassembling structure for the lock nut of the movement of the turbocharger according to claim 1, wherein the clamping portion is located on a shaft body of the turbine shaft; the clamping portion is a flat key groove.

7. The assembling and disassembling structure for the locking nut of the turbocharger movement according to claim 1, wherein the locking nut is a nylon ring locking nut.