Method of torque control operation of the safety clutch of the drive circuit of the machine
(57) Abstract:The inventive when torque control actuation of the safety coupling measure the angles of rotation of the shaft of the working body with structurally uneven resistance, which determines the amendments to this resistance, and the time of actuation of the clutch is determined taking into account torque rotating one of the shafts of the drive circuit of the machine when locked shaft couplings M1and upon release from locking Mxwith regard to gear ratio and efficiency part of the path between the coupling and the shaft of the scroll. 1 C.p. f-crystals, 3 ill. The invention relates to load technique and can be used for controlling the time of actuation of the safety coupling, working as part of the drive circuits of the machines.There is a method of torque control actuation of a safety clutch according to the length of the compressed spring acting on the drive (clutch) (see self-Propelled harvester "Niva". The user guide. Rostov-on-don, 1973, S. 114).However, this method is inaccurate due to the fact that it is not direct, but indirect because of the magnitude of torque is judged only by the length of the compressed and operation of the safety clutch of the drive circuit of the machine, described in and.with. N 1571439 G 01 L 3/00, 14.06.90.The essence of this method lies in the fact that the trigger point of the coupling is found from the expression Mc=i(M1-Mx), where M1and Mxtorques of rotating one of the shafts of the drive circuit of the machine, which measure, respectively, when locked shaft couplings, and upon release from the stopper; i gear ratio part of the drive path between the coupler and the shaft rotational path; the efficiency of this part of the circuit.However, when applying this method to control the setting of the safety clutches with machines having operating parts with structurally uneven resistance to rotation, reduces the accuracy of the control due to the fact that structurally uneven resistance to scroll through these bodies affects the values of M1and Mx.The aim of the invention is to improve the accuracy of torque control operation of the safety clutch for machine having a working body with structurally uneven resistance to spinning at idle.This goal is achieved by the fact that in the method of torque control operation safety clutch prednamerennoe coupling via the drive circuit of the machine with one of its shafts, on which measure the time scroll M1upon actuation of the clutch and which determine the moment Mwithactuation of the clutch, which further define before or after the above-mentioned rotating when removing the stopper from the shaft for check clutch moment resistance Mxthe spinning of the drive circuit with the same shaft of the scroll, and the time of actuation of the coupling are given i final part of the drive path between the coupler and the shaft of the scroll and h efficiency of this part of the drive circuit, when the torque control actuation of the clutch for a machine having a working body, rotating with structurally uneven resistance to spinning, at idle measure the angles of rotation of the shaft of the working body with structurally uneven resistance, which determines the amendments DMtoand Mpin structurally non-uniform resistance to the replay of this working body when defining respectively M1and Mxgiven to the shaft of the scroll, and the time of actuation of the clutch is found from the expression
In order to reduce time to identify amendments Mtousausausa together with this shaft, on which the amendments Mtoand Mp.As a specific example of the method used to verify the configuration of a safety clutch unloading auger grain combines "Niva".This harvester has a working body with a structurally unequal resistance to spinning provenancial. The uneven resistance to spinning the working body lies in the construction of polemoniales, since the so-called "comb", its location and mounting on the shaft create it.Resistance to the spinning shaft of polemoniales changes depending on the angle of rotation of this shaft, and it can be defined escenografia by or based on mass measurements.Plot moments rotating the shaft of polemoniales depending on the angle of rotation of the shaft shown in Fig.1.In Fig.2 shows the device adapter on the shaft of the threshing drum combine harvester "field", through which is possible with a torque wrench to scroll through the drive circuits of the combine harvester when the control setting of the safety clutch.The adapter 1 vypolneknija 3. The adapter 1 is mounted on the shaft 4 threshing drum bolt 5 and nut 6 (on the shaft of the threshing drum has holes to scroll to the left along the harvester side).Control the setting of the safety coupling as follows.Scroll with the shaft 4 threshing drum described above device adapter 1 with a torque wrench 3 and is measured by a torque wrench torque scroll Mx. Measured with the protractor the angle of rotation of the shaft of polemoniales, and this angle value on the graph (Fig.1) (and can be done at the table or special chart) determine a correction Mpin structurally non-uniform resistance to the spinning shaft of polemoniales.Then separat shaft for check clutch unloading auger crowbar and again scroll drive circuits combine with a drum shaft with a torque wrench 3. When the trigger coupling determines the torque resistance to the replay of M1and according to the schedule (Fig.1) determine the amendment Mtoin structurally non-uniform resistance of polemoniales, pre-determined angle of rotation of the shaft of polemoniales.
For example, the test method were obtained the following values: Mx=97 nm; Mp=2 nm;; M1=210 nm; Mto=4 nm.
Its final drive ratio of the drive circuit between the safety clutch unloading auger and the shaft is admittedly known from the technical characteristics of the harvester, and the efficiency of this part of the contour of the technical literature. Work is equal to 1.45.
2. The method according to p. 1, characterized in that mounted on the shaft of the working body with structurally uneven resistance chart, rotating with the shaft, on which the amendments Mtoand Mp.
FIELD: contactless measurements of steering shaft torque in control system of rudder electromechanical booster.
SUBSTANCE: proposed torque transducer has torsion shaft, case accommodating wound former of inductance coils, and shields with ports perforated therein. First and second parts of shaft are coupled through torsion shaft and shields are installed at butt-ends of shaft parts facing each other. First shield is attached by means of bushing and second one is fixed in position. Former carrying inductance coils is installed in case with aid of radial projections disposed in guide slots of case and abuts against first shield spring-loaded relative to case. First part of shaft under inspection has slots formed on its side surface at butt-end facing end projections of shaft second part in specified space relation permitting relative turn of parts of this shaft up to stop of slots at projections. Each slot is provided with longitudinal groove. Bushing of first shield is mounted in slots for displacement over them and has radial projections disposed in longitudinal grooves of slots. Each bushing projection is spring-loaded to slot groove wall in one direction by mounting flat bent spring in seat to act upon opposite wall of slot groove.
EFFECT: enhanced stability of transducer output characteristic.
10 cl, 5 dwg
FIELD: automotive industry.
SUBSTANCE: device has a sensor made of a magnetically flexible material and secured to the shaft. The sensor has cylinder provided with spiral slots. One half the cylinder is provided with slots inclined at +45 degrees, and the other half the cylinder has slots inclined at -45 degrees. The material between slots is a part of the right-hand and left-hand thread spiral, respectively. Two inductive coils embrace both halves the sensor.
EFFECT: simplified design and enhanced reliability of pickup.
2 cl, 4 dwg
FIELD: instrument industry.
SUBSTANCE: pressure gauge has pendulum measuring member provided with additional counterweight and arrester which can be adjusted in height and locked in the working position. The weight of the additional counterweight is determined from the equation proposed.
EFFECT: enhanced accuracy of measuring.
1 cl, 3 dwg
FIELD: electrical engineering; electric drives.
SUBSTANCE: proposed device designed for limiting induction motor shaft torque depends for its operation on using information about active input power directly proportional to torque and has switch, current transformer and potential transformer inserted in motor stator circuit, as well as amplifier, two rectifiers, matching unit, scaled resistor, and resistor optocoupler. Current transformer output is connected to input of first rectifier whose output is connected through matching device to photodiode of resistor optocoupler. Potential transformer output is connected to input of second rectifier whose output is connected through scaled resistor to amplifier input; connected to amplifier feedback circuit is photoresistor of resistor optocoupler. Amplifier output is connected through threshold unit to switch input.
EFFECT: enhanced reliability and precision of motor shaft torque limiting, enhanced noise immunity of device.
1 cl, 2 dwg
FIELD: measurement technology.
SUBSTANCE: detector can be used for testing transportation vehicles, control and alarm systems. Detector has shallow case, first and second elastic member and elastic members' relative displacement transducers. One end of first elastic member is tightly fastened to the case; the other end is made movable. Elastic member has shallow cavity inside which movable member is housed which is tightly connected with movable end of first elastic member. Second elastic member is made in form of membrane which has center to receive power action. Second elastic member is connected with movable end of first elastic member to form cavity between them. First to fourth relative displacement transducers are mounted pairwise in mutually perpendicular planes crossing central axis of first elastic member - between motionless end of first elastic member and free end of movable member. Fifth to eighth relative displacement transducers are mounted between case and movable end of first elastic member; the transducers are placed pairwise in mutually perpendicular planes crossing mentioned central axis. The ninth relative displacement transducer is mounted inside cavity between movable end of first elastic member and second elastic member at central part of membrane.
EFFECT: improved precision of measurement; reduced sizes; reduced number of detectors used for measurements.
3 cl, 4 dwg
FIELD: measuring equipment engineering.
SUBSTANCE: device has rotor, stator and electronic processing block. On the rotor, tension bridge, converter of voltage into frequency, stabilizing rectifier, rotating winding of transformer are placed. On stator pulse amplifier is placed, connected to converter by capacitor of capacity communication, having fixed plate and fixed winding of transformer. Fixed plate of capacitor is placed in electric field of rotary transformer winding. Converter and amplifier of pulses are electrically connected to each other by common mass, output of converter is connected to rotary winding of transformer.
EFFECT: higher reliability.
3 cl, 1 dwg
FIELD: measurement technology.
SUBSTANCE: momentometer can be used for measuring for example torque on shaft of engine. Momentometer has base with arm-piece onto which non-ferrous disc is mounted, electro-magnet system with flange provided with electromagnets and measuring unit with scale, indicator, flange, counterweight and cam. Cam is connected with counterweight by means of elastic coupling fixed at peripheral part of cam. Cam is connected with flange by means of guides to provide removal and subsequent re-mounting of cam fastened with its opposite side to axis of rotation.
EFFECT: ability of measuring torques as clockwise and anti-clockwise.
FIELD: measurement technology.
SUBSTANCE: method is realized by measurement of angular velocity of shaft of engine at constant speed of the ship. Feed of fuel is switched off and angular velocity as well as angular brake of shaft of engine is measured during -10 seconds. Efficient power is calculated by specific formula.
EFFECT: improved precision.
FIELD: measuring means.
SUBSTANCE: device has hollow rotor with strain-gauge bridge placed inside the rotor, converter, rectifier-stabilizer, transformer's rotating winding, stator, motionless winding of transformer and electronic processing unit. Stator has pulse amplifier connected with converter through capacitive coupling. Strain-gauge bridge, converter and rectifier-stabilizer are disposed inside hollow rotor.
EFFECT: improved reliability of operation; improved precision; reduced chance of damaging strain-gauge bridge.
2 cl, 2 dwg
FIELD: measuring engineering.
SUBSTANCE: method comprises determining time intervals between the moments when double-polar pulses of electromotive force of the magnetic pickups passes through zero, on-off time period of the pulses, and their ratio that is proportional to the torque. The device has two axially aligned shafts that are interconnected through a flexible member. Both of the shafts are provided with teeth. The angular shift of the teeth is zero when the torque is absent. Two magnetic shafts are mounted parallel to the axial line of the shaft so that, when any tooth passes through the magnetic field of the corresponding pickup when shafts rotate, the pickup generates double-polar voltage pulse. When the torque exists, the flexible member is deformed, and the angle between the first and second teeth differs from zero. The time interval between the pulses of the first and second pickups is proportional to the twisting angle of the member, i.e. to the torque.
EFFECT: enhanced accuracy of measuring.