CN201461901U - Planetary Gear Assemblies for Planetary Gearboxes - Google Patents

Abstract

The utility model relates to a planetary wheel assembly for an epicyclic gearbox, which is characterized by comprising a gear ring, a transitional sheath, an outer ring, an inner ring and cylindrical rollers, wherein the internal surface of the gear ring is matched with the external surface of the transitional sheath; the internal surface of the transitional sheath is a spherical surface, and the external surface of the outer ring is a spherical surface; the internal surface of the transitional sheath is matched with the external surface of the outer ring; the cylindrical rollers are installed on the roller tracks of the outer ring and the inner ring; and the inner ring is matched with a shaft. The external surface of the gear ring is straight teeth or skewed teeth. The inner ring of the utility model is cylindrical or conical. The part between the transitional sheath and the outer ring can rotate and deflect. The outer ring, the inner ring and the cylindrical rollers of the utility model constitute a biserial full cylindrical roller bearing. The transitional sheath, the outer ring, the inner ring and the cylindrical rollers of the utility model are made of high-carbon chromium bearing steel; and the gear ring is made of 42CrMo4. The utility model has the advantage of simple structure, can bear large radial load and has the function of self-aligning.

Description

Planetary Gear Assemblies for Planetary Gearboxes

Technical field:

The utility model relates to a planetary gear assembly for a planetary gear box.

Background technique:

The planetary gear assembly is a component used in the wind turbine planetary gearbox to support and bear the gear load. This product is specially used in the planetary gearbox of the wind turbine to withstand the radial force and moment of the gear transmission. .

See Figure 1. This product is widely used in planetary gearboxes for wind power generators because of its simple structure, compact size, strong bearing capacity, and self-aligning function. Currently, this product uses double-row cylindrical roller bearings and gears Ring fit or spherical roller bearing and ring gear fit, the disadvantages of these two structures of bearings are:

1. At present, although the structure of double-row cylindrical roller bearings and ring gears is simple, local contact is prone to occur, and it cannot solve the bearing failure and ring gear failure caused by the eccentric load generated by the gears under different directions of force.

2. Although the self-aligning roller bearing and ring gear are used to cooperate with this component, although it has the self-aligning function, the radial load it bears cannot meet the expected requirements.

The current structure can't solve the problem of not only being able to bear a large radial load but also having the function of self-alignment.

Invention content:

The technical problem to be solved by the utility model is to overcome the above-mentioned deficiencies in the prior art, and provide a planetary gear assembly for a planetary gearbox.

The technical solution adopted by the utility model to solve the above-mentioned technical problems is: the planetary gear assembly used in the planetary gearbox is characterized in that it is provided with a ring gear, a transition sleeve, an outer ring, an inner ring, cylindrical rollers, and the inner surface of the ring gear Cooperate with the outer surface of the transition sleeve, the inner surface of the transition sleeve is spherical, the outer surface of the outer ring is spherical, the inner surface of the transition sleeve matches the outer surface of the outer ring, the cylindrical roller is installed on the raceway of the outer ring and the inner ring, the inner ring fit with the shaft.

The outer surface of the ring gear of the utility model is straight teeth or helical teeth.

The inner ring of the utility model is cylindrical or conical.

The transition sleeve of the utility model cooperates with the outer ring, and the transition sleeve and the outer ring can rotate and swing.

The outer ring, inner ring and cylindrical rollers of the utility model form a double row full complement cylindrical roller bearing.

The transition sleeve, outer ring, inner ring and cylindrical roller of the utility model are all made of high-carbon chromium bearing steel, and the ring gear is 42CrMo4.

The utility model has the following advantages and effects: the structure is simple, it can not only bear larger radial load, but also has the function of centering.

Description of drawings:

Fig. 1 is the structural representation of prior art;

Fig. 2 is a schematic structural view of an embodiment of the utility model.

Detailed ways:

Referring to Fig. 2, the planetary gear assembly used in the planetary gearbox in the embodiment of the utility model is composed of a ring gear 1, a transition sleeve 2, an outer ring 3, an inner ring 4 and several cylindrical rollers 5, and the transition sleeve 2 , the outer ring 3, the inner ring 4, and the cylindrical roller 5 are all made of high-carbon chromium bearing steel. The ring gear 1 is made of 42CrMo4. The surface and the outer surface of the transition sleeve 2 are interference fit to ensure that they are integrated after the fit; the inner surface of the transition sleeve 2 is a spherical surface, which is matched with the outer surface of the outer ring 3, and the transition sleeve 2 and the outer ring 3 can swing with a certain inclination angle , the transition sleeve 2 and the outer ring 3 are assembled by punch press fit; the raceway of the outer ring 3 has a double-row raceway, which facilitates the movement of the cylindrical roller 5 in the raceway, and the cylindrical roller 5 and the inner ring 4 and outer ring 3 raceways Both are matched, the inner ring 4 can be cylindrical or conical, and the inner ring 4 and the shaft have an interference fit and rotate together with the shaft.

The design features of the embodiment of the utility model greatly improve the bearing deflection moment of the entire planetary wheel assembly, because: ① the use of double-row full complement short cylindrical roller bearings increases its radial load capacity; The characteristics make it have the function of self-aligning and can bear large deflection loads.

Claims (5)

1. A planetary gear assembly for a planetary gearbox, characterized in that: a ring gear, a transition sleeve, an outer ring, an inner ring, and cylindrical rollers are provided, the inner surface of the ring gear cooperates with the outer surface of the transition sleeve, and the transition sleeve The inner surface of the outer ring is spherical, the outer surface of the outer ring is spherical, the inner surface of the transition sleeve is matched with the outer surface of the outer ring, the cylindrical roller is installed on the raceway of the outer ring and the inner ring, and the inner ring is matched with the shaft. 2. The planetary gear assembly for a planetary gearbox according to claim 1, wherein the outer surface of the ring gear is straight teeth or helical teeth. 3. The planetary gear assembly for a planetary gearbox according to claim 1, wherein the outer ring, inner ring and cylindrical rollers form a double-row full complement cylindrical roller bearing. 4. The planetary gear assembly for a planetary gearbox according to claim 1, wherein the inner ring is cylindrical or conical. 5. The planetary gear assembly for a planetary gearbox according to claim 1, characterized in that: transition sleeves, outer rings, inner rings, and cylindrical rollers are all made of high-carbon chromium bearing steel, and the ring gear is made of 42CrMo4.

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