Safety clutch for rolling stand main drive transmissions

FIELD: mechanics, metallurgy.

SUBSTANCE: proposed safety clutch incorporates a rotary-sliding sleeve, its one end receiving the spindle inner thread part and axially moving, while its other end envelopes, with heavy-keying fit, the spindle part comprising inner sleeve. Note that its rear end representing a sleeve continuation forms in the case of an overload, with help of a spacer sleeve and a gap swollen by operating fluid, an yieldable friction joint ruling out the turning. The force of starting axial shift is adjusted by the cylinder pressure. Additionally the spindle threaded section can be furnished with a rigid bearing section, while the spindle section with inner sleeve can have a floating support section.

EFFECT: yieldable friction joint ruling out the turning.

9 cl, 1 dwg

 

The invention relates to a safety clutch overload, in particular for transmission of the main drives of rolling stands, the overlapping area of the spindle, made with serrated cutting, and the portion of the spindle is formed with a blind landing.

In modern mills for rolling of thick plates currently often taken from the side of the engine outside of moving in the axial direction of the drive shafts to install the clutch-torque limiter for overload protection.

In drive shafts of the safety function of the axial overload, for example, is achieved by using an oblique fracture of the rolls in the mobile element. When this movable element is also used to compensate for the elongation of the active displacement of the rolls.

Unlike cardan shafts, spindles, flat pin, as a rule, have no axial mobility. In drives with flat pin is very small offset between tream side rolls and fist. For larger axial displacement or as a protective function when the accident is applied separately offset fist on the spline shaft.

From the document DE 3811790 A1 is known, for example, the actuator of the rolling mill with connecting the spindle with the hinge with circular teeth. When located between the toothed roller and the working rolls having axial mobility fixed the different spindles, spindle hinge is formed from connective clubs with circular teeth, and a coupling sleeve with internal teeth and covering this clubs. The connecting sleeve slipped over the neck shaft gear respectively of the work roll. Swivel spindle goes between the connecting sleeves with support elements located in the region of the axis of the spindle and movable along the axis of the hydraulic pushers. To compensate for the axial displacement of the work roll, the United articulated spindle, the inner toothed cutting the connecting sleeve beyond the circular teeth of the coupling easier, at least on the same plot L carrier length, which corresponds to the size of the possible axial movement of the hinge spindle.

In the document DE 3706577 C2 disclosed serrated swivel spindle for driving a rolling mill provided at the end of the spindle shaft connecting clubs with circular teeth and covering their internal toothed cutting the connecting sleeves, supported at both ends on the spindle shaft by means of ball toe and pressing device, and the path of the lubricant, which includes provided with a ring groove, through which oil is supplied. Ring, inlet oil, hermetically covers the spindle shaft and set it with a possibility of rotation, protection against axial displacement, while the groove, at least one hole in the spindle shaft is connected at least with one passing in the longitudinal direction of the Central channel, which can be supplied with oil to be lubricated and cooled gear couplings. The opening of the Central channel has a side rolls in the end region of the spindle shaft of larger diameter for receiving the push-pushers with the preload due to the Belleville springs. At least one mounted on the spindle shaft housing to drain oil hermetically covers the coupling and the ring for oil supply. The spindle shaft is installed without the possibility of turning and is movable along the axis in at least one connective tree and with the possibility of axial movement on pre-stressed along the axis of the guide sleeve having a ball heel. The Central channel is equipped with holes and oil passages for circulating lubrication of the friction surfaces between having the possibility of axial movement on the spindle shaft connecting trefon, with the possibility of axial movement on the spindle shaft guide sleeve mounted on the adjusting devices ball toe and circular teeth, shifting to the internal teeth.

In the document DE 4028158 A1 shows the IUF is and to connect with each other two, with the possibility of axial rotation of the parts, together covering essentially cylindrical connection piece fixed between to be connected to each other by parts, and has the ability to extend outwards as well as inwards to provide a connecting clamping force on the workpiece through an intermediate connection piece. The connecting part includes a pressure chamber, which is designed to power through the channel leading working environment for lengthening the connecting parts, and provided with a device for unloading pressure, which is triggered by the relative rotation of the above mentioned items. The fitting has this embodiment, which is called the first item affects more connective force than the other parts, and a device for pressure relief is designed so that it is activated when the relative rotation between the first part and the connecting part, however, allows rotation between the other part and the connecting part.

In the document DE 3419307 disclosed a device for releasable frictional connection between made in the form of a hollow shaft input shaft of the transmission, mounted on spaced bearings inside the housing, and inserted in him a drive shaft. The input shaft of the transmission is made fluid-filled is within a small radial width of the annular chamber, ending before the bearings. At least one end of the input shaft of the transmission is provided a device for creating pressure in the fluid, connected to the annular chamber, resulting in the clamping of the input shaft of the transmission to the drive shaft.

In document EP 0429468 B1 disclosed a connecting device that limits torque, with two coaxially relative to each other connecting elements, which are rigidly connected to a driving or driven shaft and which are in engagement with each other by means of two facing each other, under load surfaces, forming a frictional connection. The frictional connection is selected so that it slips when the torque acting on the clutch exceeds a specific value. Project also provides for the perception of emerging slippage in the frictional connection and disconnection of the connection upon the occurrence of slippage. This frictional connection includes a cylindrical part, which is rigidly connected with the connecting element and the press fit has a cylindrical buxu and which is rigidly connected with the other connecting element. Further, the connecting device has a high-pressure pump, which is driven with the aid of the detector device, he delivers fluid under pressure to the exhaust channel, when there is slippage in the frictional connection. At least one friction surface is made with a number of holes, which are connected with the outlet channel of the pump. Holes are made in such a way that they form a hydrostatic layer together with the friction surfaces while supplying the working fluid.

Document DE 10112 088 A1 relates to a method of creating a pressure in the couplings for connection with the power circuit of two coaxial subject to connection without gap elements of the machine - one on the drive side and the second side of the drainage capacity of the machine elements with one intermediate space bounded at least partially elastically deformable wall, which can be filled with the working environment. The working environment during rotation of the coupling using at least one transport device located in the area of the outer perimeter of the coupling, served together from rotating reservoir for the working fluid in the intermediate space, the actuator is formed by an eccentric disc, which directly or indirectly affects the transport device through another working body.

Based on the above prior art, the ass is her invention is the solution in particular, for the drive with a flat pin with two bearings for the balancer spindle, which could be integrated, preferably, in the existing drives a device that protects against rotation and offset.

To solve this problem in safety clutch overload, in particular, for the transmission of main drives of rolling stands, which covers the area of the spindle, provided with a toothed cutting, and the portion of the spindle is formed with a blind landing, features a swivel-sliding sleeve which at one end with the possibility of axial mobility takes the plot of the spindle with the inner toothed cutting and the other end covers the area of the spindle with inner sleeve on deaf landing, and its rear-shaped bushing continuing through the spacers and through the gap in which is formed a thrust at the expense of the working fluid creates in case overload yielding frictional connection without turning. Through such measures have managed to get a combination of protective mechanism for the axial overload with fixation against rotation when the overload caused by curl.

In the embodiment, the safety clutch is provided, perception of a connecting axial compression forces between the parts of the spindle are preferably lying is outside the cylinder axial pressure as distantsiruyutsa devices to fulfill this role pliable device under overload conditions.

Other embodiments of the invention respectively provide the dependent claims.

This can be foreseen, namely, that one portion of the spindle is made with hard supporting section and the other section of the spindle - floating reference section.

Further, it may be provided that in the event of axial overload at the site of the spindle in the direction of the sides of the rigid support section this section of the spindle floating reference site, with a device for locking against rotation and tilt-sliding sleeve with internal teeth, cuts, has the ability to shift on the part of the area of the spindle, provided with external teeth meats.

The advantage is that the force of the launch of the axial displacement can be adjusted by using the pressure in the cylinders. Further, the advantage lies in the fact that the cylinders can be made for regulation and, accordingly, the damping effect of the connection.

Expedient embodiment of provides that when exceeding the torque plot spindle is rigidly connected by a sleeve configured to slip relative to the rotary-slide sleeve and the spacer sleeve and the safety ring ill is to connected with this site, is in connection with shut-off valve, thereby opening the connection, which had a preliminary expansion at the expense of the working fluid in the gap to create pressure. After opening rotates on the bearings, then the time of opening can be adjusted by pressure on the spacer.

Other details, features and advantages of the invention ensue from the following explanation of the exemplary embodiment, schematically shown in the drawing, which shows a combined safety clutch for protection against rotation and displacement, in particular, for the transmission of main drives of rolling stands, which covers the area of the spindle, provided with a toothed cutting, and the portion of the spindle is formed with a blind landing.

Proposed according to the invention of the safety clutch is made with a swivel-sliding sleeve 3, which at one end with the possibility of axial movement accepts section 1 spindle with jagged cuts and with the other end of the cover with a blind landing area 6 spindle with inner sleeve 4, which on its part when it moves back shaped sleeve 13 continue swivel-sliding sleeve 3 is formed with a spacer sleeve 5 with regard to the gap 14, which creates a pressure due to the expansion of the working fluid, the frictional connection is of no possibility of twisting, which is pliable in the event of an overload, and for axial connecting the compressive forces between the parts of the spindle 1 and 6 are provided as distantsiruyutsa devices located outside the axial pressure cylinders 7, 71that made pliable when overloaded.

Section 1 of the spindle has a support in the form of site 2 rigid supports, section 6 of the spindle has a support in the form of section 8 of the floating support. When axial overload section 6 in the direction of the side section 2 rigid supports this plot 6 spindle with section 8 of the floating support device (4, 5) fixation against rotation and tilt of the sliding sleeve 3 with internal gear cutting, has the ability to shift on the part of the plot, 1 spindle, provided with an outer toothed cutting. The force of the launch of axial movement can be adjusted by using the pressure in the cylinders 7, 71. When the cylinders 7, 71can be used for regulation and, accordingly, the damping effect of the clutch.

When exceeding the torque plot 6 spindle is rigidly connected by a sleeve 4 slips relative to the rotary-slide sleeve 3 and the spacers 5 and rigidly United with section 6 of the spindle guard ring 10 separates the cylinder shutoff valve 11, resulting in the disconnection of the connection, the floor is obtained by pre-expansion of the working fluid in the gap 14 is a pressure, and after disconnection rotating on the bearing 12, and then the moment of opening is controlled by the pressure in the spacer sleeve.

The functioning of the proposed safety clutch can be described as follows.

Section 1 spindle with external teeth meats installed at site 2 rigid supports in axial and radial direction. He passes the desired rolling moment with geometric circuit through the rotary-sliding sleeve 3. Between the end of the rotary-slide sleeve that does not have teeth, slicing, and with a bushing 5 host protection against twisting has a friction closure. It is supported by the working fluid, which is located in the gap spacers 5. The inner sleeve 4 are rigidly connected to the section 6 of the spindle. The axial mobility of the gearing between site 1 spindle and rotary-slide sleeve 3 is limited to, at least one cylinder 7, 71.

So, for example, at an oblique fracture of the rolls to protect from damage the device balancing spindle, bolts, hinges on the side of the engine, the axial bearing of the intermediate shaft and, respectively, lower engine parts which are not connected directly, but the engines from axial displacement, axial overload on the section 6 of the spindle in the direction of the sides of the rigid supports this section of spinde what I floating reference area 8, device 4, 5, 10, 11, 12 fixation against rotation and tilt of the sliding sleeve 3 with internal teeth, cuts, shifts in plot 1 spindle, provided with an outer toothed cutting. The shift value is limited by the distance between the facing to each other end sides of the spindles, which can be set. The force of the launch of axial displacement is controlled by the pressure in the cylinders 7, 71. When exceeding the maximum pressure is lowering the level of the working medium in the cylinder and thereby creates the possibility for bias. The cylinders 7, 71give the opportunity to actively throttling or damping. The offset section 8 floating support occurs in segments 9.

When over-torque is slippage of section 6 of the spindle is rigidly connected with the sleeve 4 relative to the rotary-slide sleeve 3 and the spacers 5. Rigidly United with section 6 of the spindle guard ring 10 separates the cylinder shutoff valve 11, so that it is breaking the connection, which by means of the fluid was set to a pre-expansion. Rotation occurs after breaking through support 12. The moment of opening is controlled by the pressure in the spacer sleeve.

1. Safety clutch for overload protection, in particular for the of transmissi main drives of rolling stands, the overlapping section (1) of the spindle, provided with a toothed cutting, and section (6) of the spindle formed with a blind landing, characterized in that it contains a swivel-sliding sleeve (3)which receives one end with the possibility of axial movement section (1) of the spindle with the inner toothed cutting and the other end covers the area (6) spindle with inner sleeve (4) on a remote landing and its rear-shaped sleeve continuation (13), through the spacer sleeve (5) and gap (14)in which is formed a thrust at the expense of the working fluid creates in the event of an overload yielding frictional connection without turning.

2. The safety clutch according to claim 1, characterized in that for the perception of the connecting axial compression forces as distantsiruyutsa devices between sections (1) and (6) of the spindle is provided outside the cylinder (7, 7') of the axial pressure.

3. The safety clutch according to claim 2, characterized in that the section (1) of the spindle is made with a plot of (2) rigid supports, and area (6) of the spindle is formed with a plot of (8) floating support.

4. The safety coupling according to claims 1, 2 or 3, characterized in that the axial overload on the plot (6) in the direction of the side section (2) rigid supports this section (6) of the spindle with a plot of (8) floating support with device(4, 5, 10, 11, 12) for fixing from p is Vorota and rotary-slide sleeve (3), has an internal gear cutting, has the possibility of bias on part of the site (1) spindle, provided with external teeth meats.

5. The safety clutch according to one of claims 1 to 3, characterized in that the force of the launch of the axial displacement can be adjusted by using the pressure in the cylinders (7, 7').

6. The safety clutch according to one of claims 1 to 3, characterized in that the cylinders (7, 7') are intended to control or damping effect clutch.

7. The safety clutch according to one of claims 1 to 3, characterized in that when the over-torque area (6) of the spindle is rigidly connected by a sleeve (4) has the ability to slip relative to the rotary-slide sleeve (3) and spacers (5) and the safety ring (10)rigidly United with section (6), is in connection with shut-off valve (11) for opening the connection, which had a preliminary expansion at the expense of the working fluid in the gap (14).

8. The safety clutch according to one of claims 1 to 3, characterized in that the spacer sleeve (5) rotatably through a support (12) rests on the inner sleeve (4).

9. The safety clutch according to any one of claims 1 to 3, characterized in that by pressure on the spacer (5) is ensured by the adjustment of set point tripping.



 

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