RU2236986C2 - Controllable pitch propeller - Google Patents

Abstract

FIELD: shipbuilding; controllable pitch propellers.

SUBSTANCE: proposed propeller includes pitch changing mechanism consisting of body, electric motor, pitch indicator sensor and planetary reduction gear. Driven gear wheel of reduction gear is connected with rod whose other end is connected with blade turning mechanism and is kinematically linked with pitch indicator sensor. Electric motor and reduction gear are located inside hollow propeller shaft and drive shaft of planetary reduction gear is mounted on end of said rod by means of anti-friction bearing. Driven gear wheel of reduction gear is also secured on this end of rod; rod is mounted inside hollow propeller shaft for rotation relative to it. Connection of pitch indicator sensor rod includes threaded part on said rod, nut, bush and fork. Bush and nut are rigidly interconnected and fork is kinematically linked with bush. Pitch indicator sensor is also connected with fork. Driven gear wheel of reduction gear is provided with lock which consists of bush with pin and fork. Bush of lock is mounted on propeller shaft, pin is received by holes made in propeller shaft and in driven gear wheel and fork is kinematically linked with bush.

EFFECT: simplified construction; enhanced operational reliability; possibility of performing emergency manual shift of blades of controllable pitch propeller and reliable locking of blades.

3 cl, 1 dwg

Description

The invention relates to shipbuilding, in particular, to ship propulsion.

Known propeller adjustable pitch (VRS), the pitch change mechanism (MIS) which consists of a planetary differential gear, to the driven gear of which a rod is rigidly attached, mounted inside the hollow propeller shaft with the possibility of rotation relative to it and connected with the rotation mechanism of the blades, and the drive shaft is kinematically connected with the shaft of the electric motor, said gear being installed inside the propeller shaft, and said electric motor outside it (Baksht Yu.V. et al. Propellers of adjustable pitch, Sudpromgiz, 1961 p. 228).

However, this MIS is excessively complex and cumbersome, which complicates the design of the SRS, reduces the reliability of its operation, limits the freedom of location of the MIs in the line of the SRS shaft.

Closest to the proposed one is VRS, whose MISH consists of an electric motor, the shaft of which is connected to the drive shaft of the planetary gearbox, and the driven gear of the said gearbox is connected to a screw on which a nut is screwed, which has the ability to move in the longitudinal direction, and the said nut is rigidly connected with a rod associated with the mechanism of rotation of the blades and the sensor of the step indicator, and the aforementioned electric motor, planetary gearbox, screw, nut and rod are installed inside the hollow propeller shaft ( Japanese patent, application No. 63166692 dated 12/27/1986).

This MISH provides a reciprocating motion of the rod and cannot be used in VRS, in the mechanisms of rotation of the blades of which the rotational movement of the rod is used, in addition, the use of an additional helical gear reduces the efficiency of the MIS and complicates its design.

The problem solved by this invention is the creation of VRS with MISH, providing the transfer of the blades using the mechanisms of rotation of the blades, the design of which uses the rotational movement of the rod.

The technical results obtained by carrying out the invention are the simplification of the MISH design and the increase in the reliability of the MISH and SRS as a whole, the increase in the MIS efficiency, the emergency manual shifting of the SRS blades, and the reliable fixation of the SRS blades.

To solve this problem, an adjustable pitch propeller comprising a pitch change mechanism consisting of a housing, an electric motor, the shaft of which is connected to the planetary gear drive shaft, the driven gear of which, in turn, is connected to the rod, the other end of which is connected to the rotation mechanism VRS blades, as well as containing a step indicator sensor, kinematically connected with the rod, moreover, the aforementioned electric motor and gearbox are located inside the hollow propeller shaft, the drive shaft of the planetary gearbox is mounted it is mounted by means of rolling bearings at the end of the said rod, and the said driven gear wheel of the gearbox is connected with the same end, the rod is mounted inside the hollow propeller shaft and can be rotated relative to it, and the connection of the step indicator sensor with the rod includes a threaded section on the specified rod, on which is screwed onto a nut installed inside said propeller shaft with the possibility of movement along it, a sleeve mounted on said propeller shaft and rigidly connected to said nut m pins, a plug kinematically connected to the sleeve and mounted in the aforementioned MISH housing with the possibility of rotation relative to it, and the aforementioned driven gear of the gearbox is equipped with a stopper including a pin mounted on an additional sleeve mounted on the said propeller shaft with the possibility of movement along it moreover, the pin is installed with the possibility of entering simultaneously into the hole of the propeller shaft and one of the holes made in the driven gear, while the specified sleeve kin aticheski associated with a fork mounted on the title misch housing movable relative thereto and connected to the actuator (e.g., solenoid).

The installation of the drive shaft and the driven gear wheel of the gearbox directly on the rod allows to simplify the design of the MIW and increase its reliability, the exclusion of the power screw transmission increases the efficiency of the mechanism, the communication of the step indicator sensor with the rod using a screw pair, sleeve and plug allows you to use the same mechanism for emergency manual drive MISH, the use of a stopper of the driven gear wheel of the gearbox provides reliable fixation of the blades of the VRS.

The drawing shows a longitudinal section of a mechanism for changing the pitch of a propeller adjustable pitch.

The step change mechanism consists of a fixed housing 1 mounted on the propeller shaft 2 (for example, by means of sliding bearings), a rod 3 mounted inside the propeller shaft 2 on the rolling bearings and fixed against movement relative to the shaft 2, the motor 4, rigidly fixed inside the propeller shaft 2 , and planetary gearbox. The rod 3 is connected at one end to a rotary blade mechanism (MPL) located in the VRS hub (MPL and the VRS hub are not shown conventionally, and the connection of the rotary rod with MPL is made in a manner known from the art, for example, by means of a gear transmission), on the other end it is rigid the driven gear 5 of the planetary gearbox is fixed, and a gear wheel 6 and a drive shaft of the gearbox 7 connected to the shaft of the electric motor 4 by means of an elastic coupling 8. are mounted on the rolling bearings 8. An eccentric 9 is fixedly mounted on the drive shaft 7 to the cat rum on the bearings of the bearings mounted satellite block 10, which engages simultaneously with the gear wheel 6 and the crown wheel 11, is rigidly fixed inside the propeller shaft 2. On the gear wheel 6 is rigidly mounted an eccentric 12, on which the bearings of the satellite block 13, included in gearing simultaneously with the gear 5 and the crown wheel 14, rigidly fixed inside the propeller shaft 2.

The rod 3 has a threaded section on which the nut 15 is screwed, with pins 16 through cutouts in the propeller shaft connected to a sleeve 17 mounted on the propeller shaft 2 with the possibility of movement along it. A plug 18 is connected to the sleeve 17, mounted in the housing 1 on the axes 19 and 20. A step indicator 21 is connected to the axis 19, the emergency drive lever 22 is rigidly fixed to the axis 20. To ensure the fork 18 (and the sensor shaft 21) is rotated, the sleeve 17 has a collar that enters the grooves at the ends of the yoke 18, and the axes 19 and 20 are offset relative to the shaft 2 to create a moment of rotation of the yoke during axial movement of the nut.

A sleeve 23 is mounted on the propeller shaft 2 with a possibility of movement along it, on which a pin 24 is rigidly fixed, passing through the holes of the propeller shaft 2 and having the ability to enter one of the holes made around the circumference of the driven gear 5, fixing it against rotation relative to the propeller shaft 2. A plug 25 is connected to the sleeve 23, which is mounted in the cutout of the housing 1 with the possibility of moving relative to it along the axis of the shaft 2, having a groove at the end in which the collar of the sleeve 23 is placed and rigidly connected to the actuator stem (for example, ktromagnitnogo) 26 of its displacement.

The current to the electric motor 4 is supplied through the brushes 27 mounted in the fixed housing 1, and the contact rings 28 mounted on the propeller shaft 2.

The step change mechanism works as follows.

With a disabled MISH and fixed VRS blades, current is not supplied to the electric motor, its shaft does not rotate, all the gears of the planetary gearbox and rod 3 are stationary relative to the propeller shaft 2, the sleeve 23 with the pin 24 is moved forward with the help of the drive 26 and the fork 25, and the pin 24 passing simultaneously through the hole of the propeller shaft 2 and one of the holes of the driven gear 5, rigidly mounted on the rod 3, fixes it from turning relative to the propeller shaft 2.

If it is necessary to change the pitch of the blades, the sleeve 23 with the pin 24 is retracted with the help of the drive 26 and the fork 25, the pin 24 leaves the hole of the driven gear 5. At the same time, current is supplied through the brushes 27 and contact rings 28 to the electric motor 4. The motor shaft and the drive shaft of the gearbox 7 begin to rotate, while the block of satellites 10 describes a circle on the eccentric 9, simultaneously rolling around the ring gear 11, and drives the gear 6. The block of satellites 13 describes a circle on the eccentric 12, at the same time rolling around the crown wheel 14, and rotates the driven gear 5 with the rod 3. In this case, the nut 15 with the pins 16 and the sleeve 17 move along the axis of the propeller shaft 2, rotating with it, and, turning the fork 18, actuate the pointer sensor step 21.

In case of failure of the electric motor or control system, the blades can be shifted manually by turning the fork 18 using the lever 22. In this case, the sleeve 17 with the pins 16 and the nut 15 moves along the axis of the propeller shaft 2, turning the rod 3.

Claims (3)

1. An adjustable pitch propeller, comprising a pitch change mechanism, consisting of a housing, an electric motor, the shaft of which is connected to the planetary gear drive shaft, the driven gear of which, in turn, is connected to a rod, the other end of which is connected to the rotor blade of the adjustable screw step, and from a step indicator sensor kinematically connected with the rod, said electric motor and gearbox being placed inside the hollow propeller shaft, characterized in that said drive shaft of the planetary gear torus mounted by rolling bearings on the end of said rod, and at the same end thereof, said fixed driven gear reducer, and the rod mounted inside the hollow propeller shaft rotatably relative thereto. 2. The rowing screw according to claim 1, characterized in that said connection of the step indicator sensor with the rod includes a threaded portion on said rod onto which a nut is screwed that is installed inside said propeller shaft and can be moved along it; a sleeve movably mounted on said propeller shaft and rigidly connected to said nut by means of pins, as well as a fork kinematically connected to this sleeve and installed in the aforementioned housing of the step change mechanism with the possibility of rotation relative to about around an axis perpendicular to the axis of the rod. 3. The propeller according to claim 1, characterized in that the aforementioned driven gear of the gearbox is equipped with a stopper including a pin, a sleeve to which this pin is attached and which is mounted on said propeller shaft with the possibility of moving along it and engaging this pin at the same time in the holes made in the specified propeller shaft and the driven gear, and the plug mounted on the above-mentioned case of the mechanism for changing the pitch with the possibility of movement along it, having a drive of movement and kinematically connected nnuyu with said sleeve.