FI92989B - Kampiakselivaihteisto - Google Patents

Description

92989

Kampiakselivaihteisto

The invention relates to a transmission mechanism for connecting a main engine, in particular a diesel engine, directly to the so-called free 5 shaft end or flange end of a crankshaft for operating generators, fans, pumps, gearboxes and other machinery at constant frequencies.

Such spur gearboxes at the free shaft ends 10 of internal combustion engines - known as "Free-End" or "Power-Take-Off" transmissions - engage their drive shafts on crankshaft flanges with flexible couplings so that two- or more-piece gearbox housings are not screwed into the engine crankcase 15. therefore need their own foundation.

An alternative to this is free-standing gearbox housings with baseboards, in which case they are placed either on the motor base or on a separate base in a fixed, optionally flexible, manner in order to reduce the transmission of frame sounds.

In the introduction to claim 1, these transmissions, also commonly known as auxiliary drive wheels, are considered to be part of crankshaft transmissions for the sake of clarity. Their various embodiments are known from the RENK 25 TACKE printing RT013 / 3.88-10e.

The object of the invention is to design a known gear gear in such a way that the torque damping clutch is not connected, as on page 7 of said print, directly to the crankshaft, but is placed on the gearbox the gearbox can be disconnected from the propulsion engine and the ship's performance remains unsafe if the individual parts 35 need to be inspected or replaced. The object is solved by the invention according to the features of claim 1. In operation, such as when engaging or disengaging a toothed joint shaft by axially displacing it in the toothed region of the crankshaft flange, the spindle forms a one-to-5 with the torque damping clutch and the transmission drive wheel, so that the latter also moves.

Compared to the hitherto known structure, the invention offers not only economic advantages but also, in particular, technical advantages.

They also include the ability to replace parts of the torque damping clutch, for example, depending on the embodiment of the transmission, directly engaged or freewheeling, regardless of driving, as the clutch does not disengage and can be accessed while the engine and propellers are still rotating. It is known that the crankshafts of two- or four-stroke engines cause different large deflections depending on the size, power, dimensioning, number of cylinders, stroke length, speed and bearing spacing, which can be seen in the drive flange as eccentric angular displacements, etc. .

In use, these angular displacements, together with the play of the outer crankshaft of the engine, change the displacement values toward the gear.

In addition to this, deviations occur in the machining of gear housings, and the crankshafts are thermally expanded in the direction of the gearbox bearing, since the axial thrust bearing of the engine is usually on the side of the propellers.

30 There are the most deviations from the coaxial axis. especially in drives where the engines and the transmission have to be attached to different foundations or flexibly, since, in addition to the distortions of the foundations, the ship's movements and flexible vessels are adversely affected.

A simple cardan clutch is generally not sufficient to handle the complex alignment levels of the crankshafts and transmission shafts resulting from such effects, and therefore the invention provides a dual cardan joint, in the form of a spur joint, that shifts all complex angular, parallel, and axial displacements. without greater return force, and the variable torques of the motor are absorbed by a torque damping switch integrated in the transmission drive wheel.

It is a further object and object of the invention to prevent the transmission of Kiel-10 dynamic auxiliary forces with a gear joint to the gearbox and its individual stages as well as to the subsequent machines, in order to achieve good operational safety in continuous use even under extreme operating conditions.

To this end, embodiments according to subclaims 2-7 are available. Both embodiments of crank mechanisms are shown below with reference to the drawings.

Figure 1 shows the upper part of the directly mounted gearbox (1) removed and the main parts shown in section. It 20 is fastened to the crankcase (4) of the drive motor (not shown) only by its flange (2) with screws (3).

A gear ring (8) is fastened to the crankshaft (5), to which the flange (6) is preferably forged, by means of screws (7), which transmits the torque via the toothed joint spindle (9) 25 to the torque damping coupling (10).

In the gearbox (1) shown as a gear, the clutch (10) rests on its bearings (15, 16) in its housing (14) by hollow shaft supports (11, 12) located on the drive wheel (13).

The clutch (10), the brackets (11, 12) and the drive wheel (13) are implemented as shown in the figure by means of screws (17, 18) as a closed drive unit which transfers the power of the motor to the driven gear (19) via the intermediate wheel (18a).

35 Unshown machinery, such as gearbox, generators, fans and pumps, is used on the shaft (20) according to the ship's maintenance model.

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Figure 2 is an enlarged fragmentary sectional view of Figure 1 to clarify the structure and operation of important Details.

The convex outer toothing of the tooth joint spindle (9) (arc-5 toothing 21) concentrates on the tooth center "Ma" as the force is transmitted at an angle and axially moving in a straight inner toothing (22) of the tooth ring (8).

Since a straight external toothing (23) is also grooved at one end of the tap joint (9), to which, for example, the leaf springs (24) of the torsional vibration damping clutch (10) engage with a suitable tooth base and side clearance, a second center of rotation "Mb" is required. the switch (10), the toothing (23) and the main television (25) hold the toothed joint shaft (9) in this area in the axial grip-15.

Due to the relatively large distance "E" of the centers of rotation "Ma" and "Mb", considerably large, mostly combined parallel and angular displacements between the crankshaft (5) and the directly mounted gearbox 20 (1) can be smoothed out.

Figure 3 shows a partial section of the free-standing transmission mechanism (26) driven by the crankshaft head (5).

Such crankshaft gearboxes are screwed either by means of 25 baseboards (not shown) to the base of the engine or, depending on the structure of the ship, to a completely separate base.

If special requirements are made for damping the transmission of frame sounds, free-standing power transmission mechanisms are often placed on their bases on elastomeric clumps and oscillating metal elements.

Such käyttimiin keep the driving-side and the side used for the radial and axial movements between the smoothing install the double-acting hammasnivelkara 35 (9).

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The embodiment of Figures 1 and 2 differs from the shape of Figure 3 only in that the crankcase (27) is separated from the gearbox housing (26) at the seal (28). Other characteristics of the double cardan toothed joint (9), the torsion-5 vibration damping clutch (10) and the drive wheel (13) in terms of their details, operation, construction and shape correspond to each other.

However, the embodiment of the torsional vibration damping clutch (10) is determined by various, mainly structural, economic principles of torsional vibration calculations, in which case special attention is also paid to the optimal angular mobility of the gear shaft (9) associated with the clutch (10).

Figure 4 shows, in both the upper and lower sections, a torque damping switch (29, 30) formed by a hub (31, 32) with its straight internal teeth (33) and curved external teeth (35) or curved internal teeth (34) and straight external teeth 20 (36). an arcuate joint, so that the toothed joint arm (37, 38) acts binary on the contact of the teeth (21, 22) between the centers of rotation "Ma - Mb". The poles (31, 32) are inserted between the brackets (11, 12) axially, and their spring elements can move within the permissible torsion angles only in the direction of the circumferential surface.

* The double universal joint shaft (37, 38) is axially controlled on the one hand by the end plate (25) and on the other hand by the protective ring (39), which also receive the restoring forces of the tooth contact (21, 22, 33, 34, 35, 36).

30 The use of a toothed articulated spindle (9, 37, 38) in different solutions depends in principle on the torque, the characteristics of the torsion springs, the magnitude of the parallel / angular displacements and the economy.

In the case of torsional vibration damping couplings (10, 29, 35 30), they are designed to be mounted directly on fixed (1) and free-standing 6 92989 gearboxes (26), as the variables used in the calculations of double universal joints (9, 37, 38) are the same as the distance "E" of the centers of rotation "Ma" and "Mb", provided that the angular deviations are the same, also 5 the same.

It can be seen from Figures 1 to 4 that lubricating oil 10 is applied to both the crankshaft side teeth (21, 22) of the articulated shaft and the tooth contact contacts (23, 33, 34, 35, 36) of the torsional vibration damping switches (10, 29, 30). 37, 38) from the hole in the middle (40), as a continuous and adequate oil supply is necessary.

From the hole (40), pressurized oil flows through the channels (41, 42, 43) to the toothing (23), spring pack (24) and clutch (10), while the radial holes (44, 45, 46) supply pressure oil to the arch teeth and their teeth. (21, 22, 33, 34, 35, 36) and clutches (29, 30) from a pumping station designed (not shown) for the entire gearbox (1, 26).

The upper section of Figures 1-4 shows a toothed articulated arm (9, 37) connected to the crankshaft (5).

In the event of a marine casualty and as a result, it must be possible to separate the power currents of the crankshaft (5) and the gear joint spindle (9, 37, 38) in a very short time so that the engine can continue to rotate with the propeller. The ship thus remains operational, and the transmission can be inspected and damaged parts replaced when stationary.

In particular, according to the invention, all important parts, including the torque damping clutch (10, 29, 30) mu-30, can be replaced on board in order to provide a crankshaft transmission. (1, 26) ensures rapid re-commissioning and the financial damage caused, for example, by the ship's insufficient current capacity remains small.

Toothed joint (9, 37, 38), torque damping clutch (10, 29, 30), hollow axle brackets (11, 12) and drive wheel (13) are connected by 7 7 92989 joints (17, 18) into a single structure considered to be an assembly which is axially fastened to the gearbox (1, 26) in the operating state by the centering ring (47), the intermediate ring (48) and the cover (49).

5 This bolted unit can be separated from the engine power flow stopped only from the crankshaft side tooth contact (21, 22) when pushed axially to the position "s" shown by the dotted line.

10 The intermediate ring (48) must first be removed. The arcuate toothing (21) of the toothed spindle (9, 37, 38) engages when the conical bevel (50) of the centering ring (47) is disengaged, whereby the outer diameter of the articulated spindle (9, 37, 38) rests on the inner diameter of the centering ring (47).

The lower sections of Figures 1-4 show the disconnected position "s" of the unit and the support of the toothed articulated shaft (9, 37, 38) with clutches (10, 29, 30), brackets (11, 12) and drive wheels (13) of the centering ring (47). the inner-diameter. The locking ring (51) with the traction device (52) 20 ensures that it is accidentally reconnected when the ship is shaken, the sea is hard, the ship is heeling or repairs take a long time.

To disengage the toothed joint spindle (9, 37, 38) from the internal toothing 25 (22) of the crankshaft-side gear (8), a mechanical traction device (52) is required with a ring (53) which in turn is screwed to the bracket (12).

Coupling is accomplished by axially displacing the unit with a pressure screw (54) which is threaded into suitable threaded holes in the cover (49) to provide non-force engagement contact with the crankshaft by toothing. (21, 22), as long as the locking ring (51) is removed first.

The arcuate toothing (21) with its associated straight internal teeth (22) also has, as is known in the case of switchable toothed couplings, certain bevels (55, 56) at the end which facilitate the engagement.

Claims (7)

8,92989 A crankshaft gearbox, wherein the free end of the driven shaft (5) of the main engine is connected to the crankshaft line by a flexible coupling and the crankshaft gear housing is attached directly to the engine as a flange gearbox (1, 2) or as a separate unit on the same or separate base (26), characterized in 10a) it has a double cardan articulated spindle (9, 37, 38) and a torque damping switch (10, 29, 30) for receiving torques from its crankshaft (5), the clutch acting as a hollow shaft and support (11) for the drive wheel (13); , 12) and is mounted 15 therein in a non-force-locking manner, b) in such a way that no prohibited additional dynamic forces are transmitted in the first or subsequent gear stages (13, 18a, 19), and c) in such a way that the transmission of such forces to associated with the transmission shaft end (20) is avoided. Crankshaft transmission according to Claim 1, characterized in that the gear joint (9, 37, 38) with the drive wheel (13) and the damping clutch (10, 29, 30) screwed to it can be disengaged for inspection of the transmission and for the spring elements to be replaced. to change the damping characteristics, and to change the bearings, gears, and coupled mechanisms, thus axially displacing so that the crankshaft-30 wire of the main engine opposite it can continue to rotate. . Crankshaft gearbox according to Claims 1 and 2, characterized in that the gearbox housing has a conical bevel (50) inside the crankshaft-side centering ring (47) and the disengaged toothed joint (9, 37, 38) remains below the inner diameter of the centering ring (47). . 9,92989 Crankshaft gearbox according to Claims 1 to 3, characterized in that the outer and inner parts of the double-cardan toothed joint shaft (9, 37, 38) can be made of type 5 and design of the torsional vibration damping clutch (10, 29, 30). depending on the magnitude of the torques, the speeds and the displacement of the shafts, provide straight or curved external and internal teeth (21, 22, 23, 33, 34, 35, 36), suitably connecting them. Crankshaft gearbox according to Claims 1 to 4, characterized in that it has a double-cardan toothed joint (9, 37, 38), an axial hole (40) arranged in the middle thereof and corresponding radial holes (42, 43, 44, 45, 46). ), through which all the interconnected gears (21, 22, 23, 33, 34, 35, 36) and the torque damping clutch (10, 29, 30) receive their pressure oil. Crankshaft gearbox according to Claims 1 to 5, characterized in that it has a double-cardan toothed joint (9, 37, 38) located at the end opposite the crankshaft (5) of the gearbox (1, 26), and in that the toothed joint shaft (9, 37, 38) is provided with a device (52, 53, 54) which allows the axial displacement described in claim 2 to engage and disengage the toothed joint gear (9, 37, 38). Crankshaft gearbox according to Claims 1 to 6, characterized in that the torque vibration damping clutch (10, 29, 30) has a torque limiting device for protection against overload. ψ 10 92989