CN201874622U

CN201874622U - Turbine rotor

Info

Publication number: CN201874622U
Application number: CN2010205449141U
Authority: CN
Inventors: 刘世华
Original assignee: SHANGDONG RUILI SEIKO PRECISION TECHNOLOGY Co Ltd
Current assignee: SHANGDONG RUILI SEIKO PRECISION TECHNOLOGY Co Ltd
Priority date: 2010-09-28
Filing date: 2010-09-28
Publication date: 2011-06-22
Anticipated expiration: 2020-09-28

Abstract

The utility model discloses a turbine rotor which comprises a rotor disc, wherein the rotor disc is provided with turbine blades; the center of the rotor disc is provided with a rotor shaft; and the center of the rotor shaft is provided with a positioning hole. The turbine rotor is integrally cast and formed through a mould. When the turbine rotor is connected with a connecting shaft, the connecting shaft only needs to be aligned with the positioning hole, and then the friction welding or the laser welding can be carried out, so that the deviation generated by an axis can be prevented, the production efficiency and the yield are enhanced, and the service life of the turbine rotor is prolonged.

Description

A kind of turbine rotor

Technical field

The turbine rotor that the utility model relates to a kind of turbosupercharger belongs to technical field of internal combustion engines.

Background technique

Along with the progressively raising of emission standard, pressurized machine is widely used in modern motor.In order to satisfy under all operating modes of motor performance and the emission request under the low speed operating mode particularly, pressurized machine must provide higher boost pressure under the situation that does not increase cost of production, this just requires to improve the rotating speed of turbine rotor, but the turbine rotor structure of generally using as shown in Figure 1 at present, the rotor disk 1 of turbine rotor all is solid basically, weight is heavier, turbine blade 2 and rotor disk 1 integrally casting moulding, rotor disk 1 is connected with coupling shaft, want to improve the rotating speed of turbine rotor, just must increase the power of power plant, the burden and the manufacture cost that have increased motor are higher; One is cast with a rotor shaft 3 on the front-end face of rotor disk 1 in addition, is used for docking coupling shaft.During butt joint, rotor shaft 3 need be alignd with the coupling shaft end face, right latter two end face carries out friction welding, carry out machine at butt welded seam after having welded and add grinding process, this Placement has following defective: when 1, artificial end face axis with rotor shaft end face 3 and coupling shaft carries out friction welding, easily produce the alignment error, cause follow-up secondary operations turbine rotor to go weight bigger, cause yield rate low; 2, adopt the mode of friction welding, can produce localized stress, the interior molecules array is inhomogeneous, has reduced the structural strength of welding part, after reaching fatigue limit, easily from fracture, the working life of having reduced turbine rotor.3, complex process causes the whole system error to increase, and has increased the following process difficulty, causes cost to strengthen.

The model utility content

Problem to be solved in the utility model is the defective at the conventional turbine rotor, and the turbine rotor of a kind of in light weight, manufacturing efficiency and yield rate height, long service life is provided.

In order to address the above problem, the utility model by the following technical solutions:

A kind of turbine rotor comprises rotor disk, and described rotor disk is provided with turbine blade, and the central position of described rotor disk is provided with rotor shaft, is provided with positioning hole in the central position of rotor shaft.

It below is the utility model for further improvement of these options;

Described positioning hole is a through hole, when being connected with coupling shaft, coupling shaft can be inserted in the through hole fully, and having overcome laser bonding preferably can not weld molten defective by depth of penetration, makes the coupling shaft of welding more firm, thus the working life of having improved turbine.

The another kind of improvement:

Described positioning hole is a counterbore, make that the end joint specific aim of the end face of rotor shaft and coupling shaft is stronger, two axle center positioning errors that welding end surface is brought in the inertia friction vibrations have been overcome preferably, make both coaxalitys improve nearly ten times, when following process, turbine goes weight little, and product qualified rate improves greatly.

Further improve:

Described rotor disk has the rotor disk end face, is provided with annular groove on the rotor disk end face.

Further improve:

Be provided with stiffening rib in the described annular groove, increased the structural strength of turbine rotor.

The utility model adopts such scheme, and the setting of annular groove has alleviated the weight of turbine rotor, under the situation with the condition supercharging, can improve the speed of rotor rapidly, reduces discharge amount of exhaust gas, makes its more fuel-economizing, more environmental protection, and fuel saving ratio can improve more than 15%.

This turbine rotor is embarked on journey by the mould integrally casting, when being connected with coupling shaft, only coupling shaft need being alignd with positioning hole and can rub or laser bonding, has prevented that axis from producing deviation, improved manufacturing efficiency and yield rate; Prolonged the working life of turbine rotor.

Below in conjunction with drawings and Examples the utility model is described further:

Description of drawings

Accompanying drawing 1 is the structural representation of the utility model background technique turbine rotor;

Accompanying drawing 2 is structural representations of turbine rotor among the utility model embodiment 1;

Accompanying drawing 3 is structural representations of turbine rotor among the utility model embodiment 2;

Accompanying drawing 4 is structural representations of turbine rotor among the utility model embodiment 3;

Accompanying drawing 5 is structural representations of turbine rotor among the utility model embodiment 4.

Among the figure: the 1-rotor disk; The 2-turbine blade; The 3-rotor shaft; 4-rotor disk end face; The 5-positioning hole; The 6-annular groove; The 7-stiffening rib.

Embodiment

Embodiment 1, as shown in Figure 2, and a kind of turbine rotor, comprise rotor disk 1, described rotor disk 1 is provided with turbine blade 2, and described rotor disk 1 has rotor disk end face 4, on rotor disk end face 4, be provided with annular groove 6, the setting of this annular groove 6 has alleviated the weight of turbine rotor, and the setting of annular groove has alleviated the weight of turbine rotor, under the situation with the condition supercharging, can improve the speed of rotor rapidly, reduce discharge amount of exhaust gas, make its more fuel-economizing, more environmental protection, fuel saving ratio can improve more than 15%.

The central position of described rotor disk 1 is provided with and is used for the rotor shaft 3 that is in transmission connection with coupling shaft, be provided with positioning hole 5 at the center of rotor shaft 3, described positioning hole 5 is a through hole, the radial cross section of described through hole is circular, when being connected, coupling shaft can be inserted in the through hole fully, overcome the not molten defective of porous weldering of laser bonding preferably with coupling shaft, make the coupling shaft of welding more firm, thus the working life of having improved turbine.

In the foregoing description, the radial cross section of described through hole can also adopt polygonal.

Embodiment 2, as shown in Figure 3, on embodiment 1 basis, can also be provided with stiffening rib 7 in annular groove 6, increased the structural strength of turbine rotor.

Embodiment 3, as shown in Figure 4, in embodiment 1, described positioning hole 5 can also be counterbore, makes that the end face street corner specific aim of the end face of rotor shaft and coupling shaft is stronger, has overcome two axle center positioning errors that welding end surface are brought in the inertia friction vibrations preferably, make both coaxalitys improve nearly ten times, when following process, turbine goes weight little, and product qualified rate improves greatly.

Embodiment 4, as shown in Figure 5, on embodiment 3 basis, can also be provided with stiffening rib 7 in annular groove 6, increased the structural strength of turbine rotor.

Claims

1. a turbine rotor comprises rotor disk (1), and described rotor disk (1) is provided with turbine blade (2), it is characterized in that: the central position of described rotor disk (1) is provided with rotor shaft (3), is provided with positioning hole (5) in the central position of rotor shaft (3).

2. a kind of turbine rotor according to claim 1 is characterized in that: described positioning hole (5) is a through hole.

3. a kind of turbine rotor according to claim 1 is characterized in that: described positioning hole (5) is a counterbore.

4. according to one of them described a kind of turbine rotor of claim 1～3, it is characterized in that: described rotor disk (1) has rotor disk end face (4), is provided with annular groove (6) on rotor disk end face (4).

5. a kind of turbine rotor according to claim 4 is characterized in that: be provided with stiffening rib (7) in the described annular groove (6).