Drive for rotary showcase rotation

FIELD: public building structures, particularly drives for showcase rotation.

SUBSTANCE: drive to rotate showcase substantially formed as superimposed disc 4 installed on pin 5 provides force transmission from drive 12 to disc 4 by means of flexible tie having tensioning means. Flexible tie is formed as closed loop of chain 10 having rigid links. The chain passes around the disc 4 along disc surface generator. Drive has sprocket 11 of driving means. The sprocket 11 is installed on shaft of hydraulic drive 12. Hydraulic drive 12 is mounted on plate 13 moving in radial direction relative disc 4 by hydraulic power cylinder 16.

EFFECT: increased safety of the drive, improved disc position adjustment, reduced size, simplified mounting and enhanced maintainability.

7 cl, 2 dwg

 

The invention relates to the field of structures for public purposes, has a rotary stage platforms, and more particularly to the construction of drive rotation at these sites.

Known drive rotation stage rotary platform, made in the form of superimposed circle, which is kinematically connected to the motor by a flexible connection in the form of an endless steel rope, covering the range of its generatrix of the surface. In the drive structure includes a cable driving pulley, which is mounted on the output shaft of predominantly gear (gearbox), directly through the clutch connected to the motor. The actuator contains a deflecting device and idler units, which are based on the rollers with grooves for the rope installed on various types of brackets. An important element of the actuator is the tension device, consisting of a counterweight and pulley, kinematically, with the rope connected to one another. While the roller axis is set parallel to the axis of the cable driving pulley, and he covered overall with a flexible coupling with the latest and overlaid circle [1].

Known drive has a number of disadvantages, the most significant of which is its low security for staff due to the use of a flexible connection in the form of a steel twisted rope. posledni operates under constant and strong tension under the effect of effort on the part of the counterweight, providing the necessary level of the friction force on the forming surface is overlaid circle. The large number of rollers included in the deflecting device and snatch blocks, which are necessary for the orientation of the rope, leads to regular (cyclic) its shape, resulting in a decrease in reliability due to the reduction of fatigue strength. The possibility of a rupture of the rope at any time is very high, and when you consider its elastic properties, the unpredictability of the trajectory of the dangling parts and limited working space beneath the circle, it becomes evident, with a high degree of probability of injury to operators serving the actuator. Another significant disadvantage of this drive is the inability to achieve an accurate positioning of the circle due to slippage of the rope along its generatrix of the surface, which is generally characteristic of flexible connections forming part of the transmission. The main technical reason for this phenomenon is the uneven tension leading and the trailing branches of a flexible connection, in this case the rope, causing the circle is the so-called arc-slip. Compounding or, in other words, reinforces the phenomenon of slipping of the rope on the wheel vertical movement of the counterweight arising from the inevitable vibration Stroitel is Noah building construction. If we consider that the counterweight is suspended on an elastic element - the rope, the movement of the counterweight may occur with significant amplitude due to resonance phenomena. One of the negative phenomena of rope slippage is the inability to control movement range in strict accordance with the rhythm of the music performance, which significantly reduces the achievement of stage effect and does not contribute to a more accurate implementation of the plan of the author of music and Director of the play. The unresolved security issues and positioning of the circle as the most significant disadvantages of the known drive you can add a number of less significant, but generally reduces the quality of this drive. Thus, the cable drive by their very nature, has dimensions that require considerable space and volume. Its design is such that the installation becomes complicated and time consuming operation. Indeed, the presence of individual components and mechanisms that make up the drive, requires the explicit approval of the placement and installation of steel rope in the system formed around rollers of different devices and blocks and cable driving pulley, is a complex Assembly task. Maintenance and repair of technical systems, which are known to drive, are also more complicated.

As the nearest tech is ski predecessor, i.e. prototype, the selected drive rotation stage rotary platform, which is the main constructive solutions coincides with the above-described analog. The difference is that from the system tension excluded the counterweight, which is replaced by device formed by a pair of screw mechanisms, in the form of turnbuckles, bearing at one end of the cable guide rollers, and the other is attached to a stationary part of the actuator, i.e. the frame [2]. This design tensioner able to reduce slippage of the rope, but does not eliminate it completely. Also somewhat increases the level of security by eliminating the possibility of accidents due to breakage of the rope suspension of the counterweight and its downfall. In General, however, the inherent limitations of the analogue, in the prototype largely preserved.

Thus, the aim of the invention is to increase safety actuator and reliability, improved performance on positioning of the circle, as well as reduced dimensions, simplifying installation and improving the maintainability.

The goal according to the invention is achieved due to the fact that the drive rotation stage rotary platform, made in the form of superimposed circle, including the transfer of force from the engine to last using GI is some connection, equipped with a tensioning device, referred to communications made in the form of a closed ring chain with rigid links, covering a circle on the forming surface and the sprocket tensioner, which is installed on the shaft of the hydraulic drive motor mounted on movable in a radial direction with respect to the circle platform, floating hydraulic power cylinder. The interaction between the chain and the circle through the layer of elastic material with a hardness of at least 60 units on shore, located on the generatrix of the surface of the circle. As the layer of material used reinforced rubber tape, such as a conveyor and as a flexible connection - socket-finger chain. Another difference from the known actuator is that the hydraulic drive rotation of the circle made by the scheme of a closed loop circulation of the working fluid and the line feed is connected with the rod of the cylinder chamber, a piston chamber which, in turn, through a three-way valve has the ability to connect either with his rod cavity or drainage hydroline.

The essence of the invention lies in the fact that the implementation of a flexible connection in the form of a closed ring chain with rigid links, covering the invoice circle the stage rotary platform and the sprocket of the drive device, eliminates the main week is the action of the prototype - the danger of rupture of the rope with all the ensuing consequences mentioned above, and its hood, affecting the accuracy of positioning of the circle. The advantages of the circuit are the result of structural features that appear in atypical - transfer torque on the circle not through gearing, and by frictional engagement with the cylindrical forming surface of the circle. This property is reinforced by the fact that the layer of material through which interact circuit and a circle under the influence of radial forces from the side chain is deformed, forming a bulge between the plates of a chain link. This is due to the fact that the layer of material has elastic properties and surface hardness of at least 60 units on shore. Can be considered applicable transfer mixed, i.e. friction-gear, with all the advantages inherent in its second part - the gear that imparts additional rigidity to the transmission provides accurate positioning range of the control signal to the actuator. Extractor circuit during normal operation is quite small and the accuracy of the angular displacement range is not affected, especially as the tensioner constantly compensate for even slight elongation. The latter circumstance, it becomes possible benefit is are claimed technical solution, the essence of which is that the sprocket tensioner is mounted on the shaft of the hydraulic motor placed on movable in a radial direction with respect to the circle platform that is moved by means of a power cylinder. In General, these sites and mechanisms, including pumping stations, form a drive, a separate part which can campanulata the best way to make optimal use of the space between the platform and around, and beyond. The pump unit can be placed at any distance and level relative to the drive unit. Design features implemented in the hydraulic circuit (2 formulas), provide a reliable interaction of all covered mechanisms and devices, as well as the exact commands to control the position of the circle during the performance, i.e. compliance with the requisite speed and precise positioning. Applied in the scheme of the solution, if necessary, allows us to quickly relieve stress on the chain tension by switching the three-way valve in the system recharge and to carry out all necessary work, including repair and replacement of the chain.

Attached to the description of the drawings shows:

figure 1 - hydro-kinematic diagram of the drive surface of a circle with a simplified image of the latter and another it is possible to equipment;

figure 2 is a radial cross section a-a raised circle in the zone of interaction between the component surface and the chain.

In General, the drive rotation stage rotary platform consists of three main parts: a drive unit 1, the main pump unit 2 and the supply pump unit 3. Drive unit 1 includes the invoice circle 4, mounted on the axis 5 and resting on the bearings, in turn, moves the plate (not shown). Forming the surface of the circle 4 includes a metal structure consisting of an annular beam 6 box section, on which is fixed a rack 7, bearing proper invoice circle 4. The beam 6 on the outer side is mounted the guide groove 8, made in the form of channel bars, shelves facing outward and curved shape of the beam 6. On the wall of the channel by any known method the tape is attached 9 made of an elastic material with a hardness of working (external) surface of not less than 60 units on shore. As the material for the tape 9 can be used reinforced conveyor belt that meets all the necessary requirements on the elastic properties and hardness. The chute 8 tape 9 form lodgement guide for the circuit 10, limiters vertical movement for which there are horizontal shelf channel. The circuit 10 must answer R the control requirements: first, it must be hard links, secondly, these links must be connected to each other by the type of the stub-finger chain, thirdly, it must be done in the form of an endless closed ring, which covers not only the range of 4, but the sprocket 11 of the drive device. The latter is mounted on the shaft of the volume of the hydraulic motor 12, is made in the form of a reversible motor mounted on movable in a radial direction with respect to the circle 4 platform 13, which is provided with supports 14, placed in the guides 15, oriented with respect to the circle 4 accordingly. The guides 15 are fixed on the tablet scene. The platform 13 has the opportunity reciprocating movement under the action of the power cylinder 16 to which it is pivotally connected and which is hinged to the bracket 17, is also attached to the tablet scene. To the circle of 4 adjacent pair of deflecting rollers 18, forming the tensioning chain 10 and mounted stationary on the tablet scene. The main pump unit 2 feeds the actuator 12 from the pump 19 to the diagram of the hydraulic drive with a closed circulation, in which the working fluid from the volume of the hydraulic motor is returned into the sucking hydroline pump. The described hydraulic drive has a remote control performance of the pump through the control unit 20. To the lines of a closed circuit through a pair of counter installed check valves 21 are connected pressure line unregulated pump 22 recharge, which is the basis of the nutrient pump unit 3. At the same time pressure hydroline pump is connected with the rod cylinder chamber 16. On the last hydroline has adjustable pressure valve 23, designed to provide on the rod of the hydraulic cylinder 16, the tension of the chain 10 the required size. The piston cylinder chamber 16 through the shut-off and control element 24 is made in the form of a three-way valve, connect either with the rod cavity of the cylinder, or with drainage hydroline, closed on the tank 25. Suction hydroline feed pump 22 and the drain valve 23 associated with the tank 25.

Drive rotation stage rotary platform works as follows.

When the pump 19 by the control unit 20 set the desired pump flow, and hence quite certain the frequency of rotation of the shaft of the hydraulic motor 12. With this frequency of rotation will rotate the sprocket 11, passing through the circuit 10 rotation on the invoice circle 4. The frequency of rotation of the latter will depend not only on frequency of rotation of the hydraulic motor, and gear ratio between the sprocket 11 and around 4, interactive mode reduction, i.e. a reduction of the rotational speed of the hydraulic motor to the circle. The hydraulic cylinder 16, is permanently connected to its rod cavity to the pressure line of the feed pump 22, will create tension in the chain 10 by moving the platform 13 along the guide rails 15 and finally it captures taut constant force, which is determined by the setting of the adjustable valve 23 on the required level of pressure of the working fluid in the pressure line of the pump. Feed pump 22 is connected to the pressure hose closed circuit circulation of the hydraulic motor 12 and pump 19 for continuous in time liquidation of deficiency of the working fluid in the circuit through a pair of counter enabled check valves 21, which transmits the working environment in one direction only. If you want to change speed drive operation, until it stops, the operator remotely via the control unit 20 changes the feed pump 19. It should be noted the autonomy of the tensioning device regardless of the current operating parameters of the hydraulic motor 12. So, if necessary strain relief circuit 10, for example for maintenance or repair, hydraulic rotation circle 4 is turned off, and charging pump starts to work. While using muehleman the first valve 24, the operator connects the rod to the cylinder chamber 16 with its piston cavity, that allows for equalizing the pressure of working medium in both the cavities and at the expense of a larger effort on the part of the piston cavity, caused by the replacement effect of stock in the respective cavity, slowly move the system the piston rod side surface of the lap 4, reducing in this way to the extent necessary the tension on the chain 10. To bring the drive to a working state, the operator switches the three-way valve 24 connecting the piston cavity with drainage hydroline and cutting off from the last pressure hydroline power supply working environment the rod end of the hydraulic cylinder 16. In this position, the latter will carry out the tensioning chain 10 and will create conditions for the hydraulic drive of the rotation surface of the range 4 to work. One of the most important features of the proposed drive is the nature of the interaction circuit 10 with the surface of the tape 9 made of an elastic material. Under the action of tension hard links embedded in the material of the tape, forming within the link convex portion of the tape is a kind of teeth, greatly improving the rigidity of the transmission and virtually eliminated the mutual slippage.

LLC "Hydraulic" together with the State Academic Mariinsky theatre has developed, manufactured and to date has carried out tests of the proposed drive in conditions SPECT is klya Rheingold, that confirmed all of the above the advantages of its drives with flexible cable connection.

Sources of information

1. RF patent №2032050, class E 04 H 3/26, publ. 27.03.95. in bull. No. 9.

2. Design and calculation of theatrical scenery. Wearyin, tutorial Flax. state Institute of theatre, music and cinematography, Leningrad, 1982, p.88 - prototype.

1. Drive rotation stage rotary platform, performed mainly in the form of superimposed circle, including the transmission from the engine to the circle through a flexible connection with the tensioning device, characterized in that a flexible connection is made in the form of a closed ring chain with rigid links, covering a circle on the forming surface and the sprocket of the drive device mounted on the shaft of the hydraulic drive motor mounted on movable in a radial direction with respect to the circle platform, floating hydraulic power cylinder.

2. The actuator according to claim 1, characterized in that the hydraulic drive rotation of the circle made by the scheme of a closed loop circulation of the working fluid and the line feed is connected with the rod of the cylinder chamber, the piston chamber through which the three-way valve has the ability to connect either with rod cavity or drainage hydroline.

3. The actuator according to claim 1, characterized in that the interaction between the chain and the circle of Khujand is realized through the layer of elastic material, located on the generatrix of the surface of the circle.

4. The actuator according to claim 1 or 2, characterized in that the material has a surface hardness of interaction with the chain links of at least 60 units on shore.

5. The actuator according to any one of claims 1 to 3, characterized in that the layer of material used reinforced rubber tape, for example a conveyor, mounted on the forming surface of the circle.

6. The actuator according to claim 1, characterized in that a flexible connection is used the stub finger chain.

7. The actuator according to claim 1 or 6, characterized in that the axis of rotation of the circle and sprocket drive device arranged vertically or inclined less than 90° to the horizon.



 

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