SU746135A1 - Multiwedge self-adjusting automatically controlled bearing - Google Patents

Description

I

The invention relates to the field of mechanical engineering and can be used in shiindeps metal cutter machines.

Known mnogokpinovoy samoustanavlivayuschyys bearing with automatic adjustment, comprising samoustanavlivayuschies inserts located around the spindle, at least one of which is mounted in the housing on an elastic member, kinematically communication-bonded with an adjusting element, with a servomotor which is fixedly secured in the housing, and the transducer on sledovatel1rno connected with amplifier and servomotor.

The automatic adjustment of the working clearance in a known bearing is carried out by a servomotor according to a signal from the converter, which is fixed in the housing next to one of the liners and is used to measure the clearance.

However, in the well-known self-locking horn horn bearing with

By automatic adjustment, the automatic adjustment system is sensitive to changes in oil viscosity and spindle rotation speed. A change in any of these factors at a constant gap leads to a change in the stiffness of the hydrodynamic wedge, and, consequently, a decrease in the accuracy of rotation of the spindle and a measurement of the loads acting on it.

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The aim of the invention is to improve the accuracy of rotation of the spindle and the measurement of the loads acting on the spindle.

This goal is achieved by the fact that the elastic element is designed as a pin elastically elongated along its axis, kinematically connected to the transducer, and the adjusting element is designed as a wedge at an angle to the shaft.

20

The bearing can be equipped with a torus, which is a self-aligning support, an additional elastic element and fixedly fixed in the body of the

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This housing containing a lid, in which the end face self-rotating support is mounted, and a transducer, the flange on which the actuator is attached, and the sleeve in which the elastic pin is installed, in addition, the bearing is provided with balls mounted aaaops between the side surface of the pin and the sleeve rollers installed between the ODN9Y of the elastic surfaces of the elastic pin, protruding) to the laying of the liner and one of the pa6o4roci surfaces of the wedge, and additional rollers, lips & novae between the other working surface of the wedge and the end face howl samoustanaalivayuscheys support surface, wherein the additional resilient element is arranged between the other end surface shtf and the composite body. .

 In addition, the bearing can be supplied with a rod, and in the Pin about the TbpidHbi of the end face adjacent to the rollers, perform an extracting valve in which the rod is attached to the transducer at its bottom; in another

The variant in the pin can be made through a cut-out, in which a transducer can be mounted, made in the form of an electromechanical displacement sensor for measuring the deformations of the walls of the pin.

In addition, in the flange for fastening the servomotor, a channel is made for discharging the lubricant in communication with the internal cavity of the separate housing.

rm ...,, i--. .-.,: ..,. l. N Bearing can be equipped with a deactivating device dd sm1can of the automatic control system at the working stroke, included in the circuit between the amplifier and the servomotor.

On fig. 1 shows a partial section through a self-guided automatic {1vak shch6g bearing with automatic adjustment; in fig. 2 - section A-A of FIG. 1 (without servomotor); in fig. 3 elastic pin with built-in electromechanical sensor; on fСх - .. :: „scheme of automatic control.

Many new self-adjusting bearings with automatic adjustment include body 1, self-aligning switch 2, mounted. on the pin 3 elastic along its axis; an adjusting element made in the form of a wedge 4, located at a right angle to the axis of the elastic pin 3 and kinematically connected by

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screws 5 with a servomotor 6. A loose connection system of the insert 2 -, pin 3 - wedge 4 - screw 5 is provided with an additional, 1 m elastic element 7, made in the form of a cup spring, and a spring 8.

The bearing is equipped with a composite housing, fixedly mounted in the housing 1, containing the cover 9, the sleeve 10,

flange 11 for mounting the servomotor, topuoByTO self-aligning support 12. In the gap between (the 5-point surface of the pin 3 and the sleeve 10 of the composite body there are balls 13, and between the working surfaces of the wedge 4 and the end surfaces of the elastic 3 and the self-supporting support 12 are installed rollers 14 and 15 .

In the elastic pin 3 in one embodiment, from the end face adjacent to the rollers 14, in order to ensure the elasticity of the pin 3 and measure its deformation, there is a groove 16 in which the rod 17 is fixed; kinematically related

with converter 18; zj another variant in the body of the pin 3 is a through-cut notch 19, in which a transducer 18 is mounted, made in the form of an electromechanical displacement transducer e of a 4-pin or inductive type for measuring the deformation of the walls, the pin 3.

The converter 18, made in the form of a capacitive-type sensor, contains an intermediate plate 20 and two plates 21, glued into a special 2: 2 holder, screwed to 23 k. ... front end of pin 3. Intermediate plate 20 using hooves 24 and 25 is suspended on the flat springs 26, and the latter through the pads 27 to 28 are attached to the pin 3. The pre-setting of the capacitive sensor is carried out by a screw 29 receiving rotation from the rod 30, which takes the place of the rod 17.

In the flange 11 for fastening the motor 6, a channel 31 is provided, which circulates lubricant in order to level the temperature field of the multi-wedge self-aligning bearing. The membrane 32 closes the leakage of oil through the opening between the sleeve 33, which serves to attach the converter 18, and the drain 9, the ring 34 serves to attach the membrane 32. To the cover 9. The spindle 35 is mounted on the IN liners 2.

Claims (6)

The automatic control system contains a converter 18, which is connected to a comparison device connected to the driver 37 and to the amplifier 38. On the one hand, the amplifier 38 is connected to a indicating or recording device 3.9, on the other hand, to disconnect the auto mathematically controlled with a servomotor 6, which is connected kinematically with a wedge 4, and the latter, through feedback, with a converter 18. When the spindle 35 rotates between it and the self-propelled input Above 2, a hydrodynamic force arises, causing deformation of undercut 16 in pin 3. In the first embodiment, deformation of undercut 16 via rod 17 is transferred to converter 18, which issues a command to servo; avigatel 6. In the second case, with elastic deformation of cutout 1- 9 pin 3 of the plate 21 together with the holder 22 will move relative to the intermediate plate 2.0, forming an electrical signal at the output of the converter 18 corresponding to this movement. The servomotor 6 rotates according to the signals received from the converter 18 screw 5, which moves the pin 4. Depending on the direction of movement of the wedge 4, it increases. or the gap between the spindle 35 and B-rider 2 decreases. The sub-articulator with automatic adjustment works as follows. At idle, the spindle 35, the shut-off device 40, which is a path switch, connects the amplifier 38 to the servo motor 6. The given hydrodynamic force, which determines the clearance in the bearing and the rotational accuracy of the spindle 35, is set by the setting unit 37. The signal from the converter 18 is supplied to a comparison device 36, where it is compared with a signal of the setting device 37. In case of a mismatch between the actual and the specified signal, the comparison device 36 outputs a signal to the amplifier 38, where it is amplified and transmitted to the device 3 9 and through the shut-off device 4O to the servomotor 6 .. The servomotor 6 moves the wedge 4 so that by moving the wedge between the liner 2 and the spindle 35 there is a gap providing. given hydrodynamic force. At the spindle run (when the process is complete, the switch 40 turns off the servo motor 6, which is adjusted at idle hoi spindle, the hydrodynamic sypa does not change, the signal from the converter 18, which measures the hydrodynamic force and cutting force in this case, enters the comparison device 36, where it is compared with the signal of the setting device 37, (i.e., from the signal of the converter 18, which is a function of the hydrodynamic force and the cutting force, subtracted hydrodynamic force). The difference between the signal converter 18 and the set 37 from the comparison device 36 is transmitted to the amplifier 38, from where it is transmitted to the indicating or recording device 39 after amplification, the cutting force (or extraneous force applied to the spindle) is measured by the instrument. The invention makes it possible to improve the quality of machined parts by providing high accuracy of spindle rotation in varying working conditions and to increase labor productivity. Claims of the invention /,. 1.Multi-peak self-adjusting self-adjusting bearing containing self-aligning inserts located around the spindle, at least one of the axial ones is mounted in the housing on an elastic element, - kinematically associated with adjusting elements, which in turn is connected with kinematics servo motor, motionless. fixed in the housing, as well as a converter connected in series with an amplifier and a servomotor, characterized in that, in order to increase the accuracy of rotation of the spindle and ensure control of the load on the spindle, the elastic element is designed as a pin along the axis that is elastic along its axis the adjustment element is designed in the form of a wedge located at an angle to the axis of the pin. 2. The bearing as described in claim 1, which is tactile, in order to ensure smooth adjustment of the working gap, it is provided with an end self-aligning support, an additional elastic element and fixedly securedtiHbiM in the housing with a composite case comprising a lid in which the mounting tube is Tbr115ShGT | MousTa1bVSH support and prototype, the flange on which the servo motor is attached, and the sleeve in which the pin is installed, in addition, it is equipped with balls installed in the gap between the side surface of the pin and the sleeve, rollers mounted between one of the end surfaces of the elastic pin opposite the liner and one of the working surfaces of the wedge, and additional rollers mounted between the other working surface of the wedge and the end surface of the self-adjusting support, while an additional elastic element is installed between the other end surface of the pin and the body. 3. The bearing according to claim 1 and 2, b It is due to the fact that, in order to ensure the elasticity of the pin and the possibility of measuring or deforming it, it is equipped with a rod, and in the pin from the end. Adjacent to the rollers, there is a groove, in which a rod fixed at its bottom is placed, kinematically connected with the transducer. 4. The bearing according to Claims 1 and 2, which is based on the fact that reduction of BPi or temperature deformations on the accuracy of regulation . I of the working gap in the pin is made through cut-out, in which the transducer is mounted, made in the form of an electromechanical mixing sensor for measuring the deformation of the walls of the pin. 0 5. A bearing as claimed in claim 1-4, characterized in that, in order to level the temperature field by providing lubricant circulation, a flange for fastening the servomotor is provided with a channel for draining the lubricant communicating with the inner cavity of the housing. 6. The bearing according to claim 1-5, which is based on the fact that it is equipped with 0 a shut-off device for opening the automatic control system at the working stroke, included in the circuit between the amplifier and the servomotor. Sources of information taken into account in the examination 1. Patent of Great Britain No. 985642, cl. F 2 A, 1965. XJ- A : m; J9 35 /