CN201335127Y

CN201335127Y - Fan drive

Info

Publication number: CN201335127Y
Application number: CNU2008201829568U
Authority: CN
Inventors: 周长秀
Original assignee: Shimaitai Transmission Technology (Shanghai) Co Ltd
Current assignee: Smart Transmission Technology (Beijing) Co., Ltd.
Priority date: 2008-12-26
Filing date: 2008-12-26
Publication date: 2009-10-28
Anticipated expiration: 2018-12-26

Abstract

The utility model belongs to the technical field of gear transmission and relates to a fan drive. One end of a main input shaft of the fan drive is connected with a wheel hub; the other end of the main input shaft adopts an external spline which is connected with an internal spline of a planet carrier of a primary planetary wheel system; the main input shaft is supported by two bearings; the two bearings are supported by a main casing; a primary planetary wheel consists of a sun wheel, a tooth ring and a planetary wheel arranged on the planet carrier; the planetary wheel rotates around a shaft thereof; the shaft adopts a radial rigid shaft; the tooth ring and the casing are rigidly connected together, and the shaft of the sun wheel adopts a rigid support shaft. The fan drive has the advantages that the fan drive can use a smaller safety coefficient and has higher reliability and lower installation and maintenance cost according to the design in the aspect.

Description

A kind of fan drive

Technical field

The utility model belongs to the gear transmission technology field, relates to a kind of fan drive.International Patent classificating number: B02B7/00.

Background technique

Blower fan adopts transmission device to increase the rotating speed of fan blade and reduce its moment of torsion, so that generating.The key factor that its design will be considered comprises: the reliability of generating efficiency, equipment and the initial cost of making installation.

Blower fan generally includes: fan blade, wheel hub, input shaft, speedup planet wheel or other gears, generator, housing, perpendicular tower etc.During the design blower fan, the dynamic load that wind speed and wind direction localised waving cause is the key factor that needs consideration.Because the bending of drive part and distortion can cause between the different rows star-wheel load sharing poor, cause the drive part life-span short, need take big safety coefficient during design.Can increase the weight of product like this, and cause production maintenance cost height.

Existing patent is avoided bending and distortion are delivered on the first order planetary gear train, in patent (US7335128), by bearing wheel hub is directly installed on the main casing.To also have in order better all carrying, the manufacturing of planet carrier to be strict with, make all planet wheel bearing bearing pins all locate intact.Other has employing that planet wheel is installed on the flexible pin shaft, and allows sun gear and/or gear ring to float (but not allowing gear ring to rotate), comes all to carry better.This is effective really to all carrying, but flexible pin shaft is difficult to design and manufacturing, and the buoyant member design is more difficult, and its robustness is lower usually.

The model utility content

The technical solution of the utility model is the manufacturing process complexity that exists in the prior art in order to overcome, the shortcoming of some parts such as flexible pin shaft, buoyant member design and manufacturing difficulty, propose a kind of fan drive, this device reliability is higher, and the installation and maintenance cost is lower.

The technical solution of the utility model:

A kind of fan drive, its primary input axle one end connects with wheel hub, and an end is that external splines connects with the internal spline of first order planetary gear train planet carrier, and the primary input axle is by two bearings, and two bearings is supported by main casing; First order planet wheel is made up of sun gear, gear ring and the planet wheel that is installed on the planet carrier, and planet wheel is around its axle rotation, and this axle is the radial rigidity axle, gear ring and housing rigid joint together, sun wheel shaft is the rigid support axle.

Said planet wheel is the gear that two flank of tooth helix angle differences promptly become transverse tooth thickness, and its axial position is adjustable.

The splined section of said primary input axle plays drum at axial direction, and the gap between the spline tooth is big to two ends at splined shaft, and is middle little.

Between said primary input axle and the wheel hub for to connect indirectly.

The splined section of said primary input axle or planet carrier is independent part, with input shaft or planet carrier rigid joint.

Said primary input axle or wheel hub can be fixed on certain position and not rotate.

The beneficial effects of the utility model:

Because use spline to connect with first order planet carrier on the primary input axle, planet carrier does not bear the load beyond the moment of torsion; Planetary gear train is realized all carrying by adjusting planet wheel, does not adopt flexible planet bearing pin, does not also adopt float gear ring and/or sun gear, can use less safety coefficient when designing like this, and reliability is higher, and the installation and maintenance cost is lower.

Description of drawings

The utility model has 3 width of cloth figure.

Fig. 1. for using a structural representation of the present utility model;

Fig. 2. be splined schematic representation in this structure;

Fig. 3. be planetary gear train schematic representation in this structure.

Embodiment

The utility model uses external splines to connect with the internal spline of first order planetary gear train planet carrier on the primary input axle, and the primary input axle is supported by two bearings, and two bearings is supported by main casing; First order planet wheel is made up of sun gear, gear ring and the several rows star-wheel that is installed on the planet carrier, and planet wheel can be around its axle rotation, and this axle is the radial rigidity axle, gear ring and housing rigid joint together, sun wheel shaft is the rigid support axle; Sun wheel shaft can be directly passed to generator with power by coupling, or passes to generator with other planetary gear train or speedup transmission, coupling after connecting again; Planetary gear train is all through adjusting, and all carries guaranteeing.

Characteristic of the present utility model will become clearer by a following DETAILED DESCRIPTION OF THE PREFERRED, and the preferred embodiment is just in order to illustrate the utility model, and it is a kind of application of the present utility model, and can not think to limit the utility model.

The basic layout as shown in Figure 1 when wind-force acts on the fan blade 2, causes fan blade and joining wheel hub 1 to begin rotation, and this rotation is passed to planet carrier 9 by hollow input shaft 8, is splined between input shaft and the planet carrier.In order to ensure only moment of torsion being passed on the first order planetary gear train 5 by planet carrier 9, planet carrier 9 is installed on the bearing 12.Bearing 10, bearing 11 are born the weight of the wheel hub and the fan blade of input shaft and its connection, and reduce to act on the fluctuation of the power on the splined between primary input axle 8 and the planet carrier 9.The gear ring of bearing 10,11,12 and first order planetary gear train 5 all is rigidly connected with housing 3.Bearing 10,11,12 allows planet carrier 9 and input shaft 8 freely to rotate.Housing 3 is installed on the perpendicular tower 4.The sun gear 9 of first order planetary gear train in this example transfers a torque to the speedup planetary gear train and the cylindrical gear pair 6 of back, and final moment of torsion passes to generator 7 and generates electricity.

Fig. 2 is the cross section of splined, the 8th, and the input shaft that connects with wheel hub, the 9th, planet carrier.Shown in spline be an involute splines or other curve that adopts the profile external drum, play drum at axial direction perpendicular to Fig. 2, the transverse tooth thickness of spline tooth 13,14 is in spline intermediate portion maximum like this, the gap 15 between two teeth is in spline two ends maximum.This gap makes splined can offset non-torsional deflection on the input shaft, avoids this distortion is delivered on the planet carrier.The splined section of the planet carrier of input shaft and/or first order planetary gear train also can be designed as independent part, with corresponding body element rigid joint.When serious wear, be convenient to like this change.Also can select, make the more easy to wear and damage of certain spline, the life-span of improving another spline than another by design or material.In addition, can design braking device, not act directly on the input shaft, be used to prevent that static input shaft from rotating with dismounting spline part.

Figure 3 shows that the cross section of planetary gear train, wherein planet wheel 17 is installed on the planet carrier 9 by bearing 19, and gear ring 16 directly is fixed on the housing 3.Sun gear 18 is installed on the output shaft 21, by bearing 20 axial constraints and support.Arrow 22 expression radial direction, arrow 23 expression axial directions.For planetary gear train, planetary gear is designed to variable tooth thickness gear, and the time adjust its axial position or adjust automatically at work in assembling, thereby can be used to compensate resultant error between the positional error of bearing pin and gear ring, sun gear circular pitch and the planet wheel transverse tooth thickness, realize all carrying.

Claims

1. fan drive, it is characterized in that: primary input axle (8) one ends connect with wheel hub (1), and an end is that external splines connects with the internal spline of first order planetary gear train planet carrier (9), and primary input axle (8) is by bearing (10,11) support, two bearings is supported by main casing (3); First order planet wheel is made up of sun gear, gear ring and the planet wheel that is installed on the planet carrier (9), and planet wheel is around its axle rotation, and this axle is the radial rigidity axle, gear ring and housing rigid joint together, sun wheel shaft is the rigid support axle.

2. a kind of fan drive according to claim 1 is characterized in that: said planet wheel is the gear that two flank of tooth helix angle differences promptly become transverse tooth thickness, and its axial position is adjustable.

3. a kind of fan drive according to claim 1 is characterized in that: the splined section of said primary input axle (8) plays drum at axial direction, and the gap between the spline tooth is big to two ends at splined shaft, and is middle little.

4. a kind of fan drive according to claim 1 is characterized in that: between said primary input axle (8) and the wheel hub (1) for to connect indirectly.

5. a kind of fan drive according to claim 1 is characterized in that: the splined section of said primary input axle (8) or planet carrier (9) is independent part, with input shaft or planet carrier rigid joint.

6. a kind of fan drive according to claim 1 is characterized in that: said primary input axle (8) or wheel hub (1) can be fixed on certain position and not rotate.