摘要:
Die Erfindung betrifft eine druckmittelbetätigbare Stelleranordnung mit einem in einem Stellerzylinder (4) geführten Arbeitskolben (2), der beidseitig mit Druck beaufschlagt ist. Um ein Auswandern des Arbeitskolbens (2) aus seiner Neutralstellung (x = 0) in Folge von Leckagen zu verhindern, wird eine Druckmittelfördereinrichtung (20) vorgeschlagen, die über eine Periode einer harmonischen Bewegung des Arbeitskolbens (2) der Seite des Arbeitskolbens (2), zu der er hin ausgewandert ist, ein Ausgleichsvolumen zuführt.
摘要:
The invention solves the problem of pneumatic locking the actuator piston rod in a selected intermediate position during ventilation. The control unit is characterized by the features that it is constituted by a four-way controlling distribution valve (10) with a directional slide (17) moved by a lever mechanism (11) connected with the smoke flap cover (2), that in the cylindrical bore of the body (12) of the controlling distribution valve (10) there is, beside the directional slide (17), a second slide, the smoke removal slide (22), that in the stroke zone of the directional slide (17) are located consecutively towards the smoke-removal slide (22) the following passages: the piston passage (14), the directional opening passage (16), and the piston-rod passage (13), and that the directional slide (17) has an external piston (19) and an internal piston (2) connected by a necking (21) of a length (b) longer than the spacing (a) between the piston passage (14) and the piston rod passage (13), and the length (c) of the external piston (19) is greater than the spacing (d) between the piston passage (14) and the directional opening passage (16).
摘要:
The invention concerns a positioning drive which is used in particular for machine tools and which comprises a hydraulic motor (10). The hydraulic motor comprises: a control disc (17) which is rotatable with a motor shaft (18) and is provided with a radial cam (19); a control valve (12) which, with the hydraulic motor (10), forms a unit with a preferably multi-part housing (37, 46) and comprises a valve piston (15) which can be displaced between a plurality of settings; a control component (16) by means of which the valve piston (15) can be supported on the control disc (17); and an adjusting component (65) which is operatively disposed between the control component (16) and the valve piston (15) and is coaxial to the latter. The relative position between the valve piston (15) and control component (16) can be varied by the relative adjustment of the adjusting component (65) to the valve piston (15). The position of the adjusting component (65) relative to the valve piston (15) can be secured by a releasable securing component. In order to be able to adjust the position between the valve piston (15) and the control component (16) very simply, the outer of the two parts, valve piston (15) and adjusting component (65), is guided outwards through the housing and the securing component (72, 80) is accessible externally of the housing.
摘要:
The invention concerns a positioning drive which is used in particular for machine tools and which comprises a hydraulic motor (10). The hydraulic motor comprises: a control disc (17) which is rotatable with a motor shaft (18) and is provided with a radial cam (19); a control valve (12) which, with the hydraulic motor (10), forms a unit with a preferably multi-part housing (37, 46) and comprises a valve piston (15) which can be displaced between a plurality of settings; a control component (16) by means of which the valve piston (15) can be supported on the control disc (17); and an adjusting component (65) which is operatively disposed between the control component (16) and the valve piston (15) and is coaxial to the latter. The relative position between the valve piston (15) and control component (16) can be varied by the relative adjustment of the adjusting component (65) to the valve piston (15). The position of the adjusting component (65) relative to the valve piston (15) can be secured by a releasable securing component. In order to be able to adjust the position between the valve piston (15) and the control component (16) very simply, the outer of the two parts, valve piston (15) and adjusting component (65), is guided outwards through the housing and the securing component (72, 80) is accessible externally of the housing.
摘要:
Servo-moteur hydraulique comprenant un vérin (1, 14) destiné à être relié par sa tige (3 1 , 3 2 , 15 1 ) à un organe mobile à déplacer et à positionner avec précision, ce vérin étant complètement repli de liquide; b) servo-moteur caractérisé en ce que le déplacement du piston (2) est réalisé par le transfert direct du liquide d'une chambre à l'autre du vérin par au moins une pompe électrique à vibreur (6) alimentée à partir d'une source de courant alternatif et en ce qu'une électrovanne (7) dite de sécurité ouverte au repos, est raccordée pour mettre en commutation les deux chambres du vérin; c) l'invention concerne les servo-moteurs hydrauliques.
摘要:
The invention relates to a method for displaying the position of a hydraulically actuated fitting, with a piston (121) in an actuating cylinder (1.2) for actuating the fitting (1.1), the piston being connected via two hydraulic lines (2, 3) to a changeover valve (7), by means of which the hydraulic lines can be switched between pressure-carrying feeding and de-pressurized return. The flow of the hydraulic fluid flowing through one of the hydraulic lines is converted into a plurality of electrical pulses, each of which corresponds to a predetermined volume unit of the hydraulic fluid. The changeover valve (7) is connected to supply lines (P, T) on which additional changeover valves for actuating additional fittings (In) are connected, and the changeover valves (7) are connected via a branch line (T1) to the common return line (T) provided for all fittings. A preload pressure higher than the pressure in the common return line (T) is maintained at each changeover valve (7) in the branch line (T1) to the return line (T). In addition, a program which processes the pulses from the flow sensor performs a learning cycle.
摘要:
The invention solves the problem of pneumatic locking the actuator piston rod in a selected intermediate position during ventilation. The control unit is characterized by the features that it is constituted by a four-way controlling distribution valve (10) with a directional slide (17) moved by a lever mechanism (11) connected with the smoke flap cover (2), that in the cylindrical bore of the body (12) of the controlling distribution valve (10) there is, beside the directional slide (17), a second slide, the smoke removal slide (22), that in the stroke zone of the directional slide (17) are located consecutively towards the smoke-removal slide (22) the following passages: the piston passage (14), the directional opening passage (16), and the piston-rod passage (13), and that the directional slide (17) has an external piston (19) and an internal piston (2) connected by a necking (21) of a length (b) longer than the spacing (a) between the piston passage (14) and the piston rod passage (13), and the length (c) of the external piston (19) is greater than the spacing (d) between the piston passage (14) and the directional opening passage (16).
摘要:
Die Erfindung betrifft ein Verfahren zum Steuern eines pneumatisch oder hydraulisch betätigten Aktuators (2), bei welchem unterschiedliche Bewegungsphasen des Aktuators (2) in Abhängigkeit vom zurückgelegten Weg seines zumindest einen Kolbens (4) eingeleitet werden und die Bewegungsphasen nur durch Ein- und Ausschalten eines auf den Kolben (4) wirkenden Fluiddruckes gesteuert werden. Ferner betrifft die Erfindung eine entsprechende Vorrichtung zur Ausführung dieses Verfahrens(Fig. 1).