KR20030067691A - A hydraulic revolving actuator - Google Patents

Abstract

Revolving actuator for hydraulic revolving a shaft, comprising a bowl rotor (3) arranged axially rotatable in a housing comprising two housing halves (1, 2), where the bowl rotor (3) is adapted to be connected with a shaft and thereby providing an upper spheric bearing for the shaft, passages thereby providing the housing halves (1, 2) with pressurized hydraulic fluid, the inner walls of the two housing parts (1, 2) thereby having a spheric shape and being sealingly abutting against the bowl rotor (3), the bowl rotor (3) comprising a circumferential recess (4) at the equator, the bowl rotor (3) having at least one partition wall (5) closing the recess (4), a cylinder limitation (8) being arranged in each recess (4) and being rigidly connected with the housing halves (1, 2), and hydraulic connections to the cylinder rooms (6, 7) established in the recesses (4) thereby ensuring supply of hydraulic pressure in the cylinder rooms (6, 7) at each side of each partition wall (5).

Description

Hydraulic Rotary Actuator {A HYDRAULIC REVOLVING ACTUATOR}

Rotary actuators of this type are known, for example, from Norwegian patent 164 648 and have a relatively complex design and include a large number of individual parts. In addition, the structure is relatively large and heavy. The reversible actuator of the above mentioned type can be used as a key machine for operating a rudder shaft on a ship, among other things.

The need for machines of this type makes not only simplicity and exact compliance, but also precise and direct transmission of steering shocks to the physical rotation of the shaft. In addition, the rotary actuator preferably has a small dimension with respect to the actual force in such a reversible actuator.

Summary of the Invention

It is therefore an object of the present invention to provide a reversible actuator that meets the above requirements and has a small size and low weight, in addition the reversible actuator should only comprise a few individual parts. This will have great advantages as well as installation and subsequent use during manufacture.

In the case of the hydraulic rotary actuator according to the invention, a very simple structure is provided having a very small outer dimension. This is achieved with a rotary actuator according to the invention as defined by the features mentioned in the claims.

The present invention relates to a hydraulic revolving actuator.

1 is a perspective view of a rotary actuator according to the present invention,

2 is a horizontal cross-sectional view of the rotary actuator,

3 is a cross-sectional view taken along the line III-III of FIG. 2.

The rotary actuator comprises an upper housing half 1 and a lower housing half 2 which is bolted and clamped together with respect to the individual parts to be rotated. The rotary actuator according to the invention is used, for example, as a key machine for operating a key shaft in which the housing halves 1, 2 are fixed to the deck of a ship or the like. This fixability can simultaneously provide an upper bearing for the shaft that is not disclosed in the figure, but extends through the figure of FIG. 3.

Within the housing with the housing halves 1, 2 a bowl rotor 3 is arranged which establishes an upper spherical bearing to the shaft and a fixation for the shaft. In the same way, a seal is arranged in the housing to contact the bowl rotor 3 as well as the inner walls of the two housing halves 1, 2.

The bowl rotor 3 comprises a recess 4 around the equator, together with the inner walls of the housings 1, 2, on each side of the partition 5 where there are several as shown in FIG. 2. Forms an inner torus. Each hydraulic line passage 10 provides pressure to the piston rooms 6, 7, and the opposing piston chamber is correspondingly modified in such a way that a pressure differential is generated between the piston chambers 6, 7. . Thereby, the bowl rotor 3 is rotated, which also rotates the shaft connected with the rotor, such as a rudder stem on the board of the ship, and thus the key.

The piston seals 6, 7 are connected to the bulkhead 5, the cylindrical connection 9, the upper and lower housing halves 1, 2 and two cylinders which are tightly connected to the housing halves and are arranged in the recesses 4. Defined by the restriction 8. It is practically important for these parts to be sealed against each other.

The rotary actuator according to the invention comprises only a few individual parts and such an actuator is very compact.

Claims (1)

A revolving actuator for hydraulically rotating a shaft, comprising a bowl rotor (3) axially rotatably disposed in a housing comprising two housing halves (1, 2), said bowl rotor (3), wherein the rotary actuator is adapted to be connected with a shaft to provide an upper spherical bearing for the shaft to provide housing halves 1, 2 with pressurized hydraulic fluid. The inner walls of the two housing halves 1, 2 have a spherical shape and are sealingly connected to the bowl rotor 3, the bowl rotor 3 having a circumferential recess 4 at the equator. ), At least one partition wall 5 for closing the recess 4, a cylinder limiting portion 8 disposed in each recess 4 and firmly connected to the housing halves 1, 2, Including hydraulic connections to the cylinder chambers 6, 7 established in the recess 4, ensuring supply of hydraulic pressure into the cylinder chambers 6, 7 on each side of each partition 5. By Rotary actuator.