Abstract:
An energy recovery retrofit kit for a hydraulic control system (50) is disclosed. The energy recover retrofit kit may have at least one of a first accumulator (108) and a second accumulator (110). The energy recover retrofit kit may also have a recovery valve block (106) fluidly connectable between an existing pump (58) and an existing motor (49) of the hydraulic control system. The recovery valve block may be configured to selectively fluidly communicate at least one of the first and second accumulators with the existing motor.
Abstract:
Methods and apparatus to charge accumulators are described An example system to charge an accumulator apparatus (100) includes a piston (104) disposed within a housing (102) to define a first chamber adjacent a first side (106) of the piston and a second chamber adjacent a second side (108) of the piston. A fill probe (202) having a body and a passageway between a first end (306) of the fill probe and a second end (308) of the fill probe removably couples to the piston to fluidly couple to the passageway of the fill probe to the second chamber of the housing when the accumulator is in a charging condition. A valve (142) is fluidly coupled to the piston to enable fluid flow to the second chamber of the housing via the piston (104) when the fill probe is coupled to the piston (104).
Abstract:
A method for filling a printing ink reservoir with a housing (1) is disclosed, the interior of which is divided into two chambers (3, 4), by means of a metallic bellows (2), serving as a medium separator. The first chamber (3) is filled with a gas and the second chamber (4) is filed with a fluid. A bottom valve (6) is provided n a hydraulic connection (5), the closing body (7) of which may be operated by the medium separator (2), permitting a filling of the second chamber (4) with fluid and preventing a complete emptying of the second chamber (4). According to the invention, a reliable filling of the said chambers (3, 4) with the corresponding medium may be achieved without damaging the bellows (2), by means of a combination of the following method steps: a) evacuation of the second chamber, b) filling the second chamber with printing ink and c) filling the first chamber with the gas.
Abstract:
A method for filling a printing ink reservoir with a housing (1) is disclosed, the interior of which is divided into two chambers (3, 4), by means of a metallic bellows (2), serving as a medium separator. The first chamber (3) is filled with a gas and the second chamber (4) is filed with a fluid. A bottom valve (6) is provided n a hydraulic connection (5), the closing body (7) of which may be operated by the medium separator (2), permitting a filling of the second chamber (4) with fluid and preventing a complete emptying of the second chamber (4). According to the invention, a reliable filling of the said chambers (3, 4) with the corresponding medium may be achieved without damaging the bellows (2), by means of a combination of the following method steps: a) evacuation of the second chamber, b) filling the second chamber with printing ink and c) filling the first chamber with the gas.
Abstract:
The invention relates to a method for producing a membrane reservoir with a metal case. The inventive method comprises the following steps; a) rotating a tubular piece around its longitudinal axis, b) preheating one end of the tubular piece for deformation through heat retraction by strain-hardening, c) strain-hardening the end of the tubular piece by applying at least one pressure tool, selectively heating the target area of said pressure tool to deformation temperature in order to form a floor at the end of the tubular piece with an opening at a collar, said collar being turned outwards, d) forming an inner circular groove in the central area of the tubular piece, e) introducing a membrane system, said membrane system being sustained in the circular groove by a corresponding clamping ring, and f) forming a second floor at the second end of the tubular piece according to steps b) and c).
Abstract:
A hydraulic servo-control (1) of a servo-controlled gearbox comprising a hydraulic accumulator (3) containing control fluid under pressure, which is in turn provided with an outer housing (7); a piston (12) arranged inside the outer housing (7), provided so as to be axially sliding and mobile inside the outer housing (7) itself and adapted to define, inside the outer housing (7), a first variable-volume chamber (C1) for a gaseous material and a second variable-volume chamber (C2) for the control fluid under pressure; and limit stop means (21) arranged at an open end of the outer housing (7), which act as a striker element for the piston (12) and comprise a circlip (22) with a substantially annular shape and a perforated plate (24) which, in use, is interposed between the circlip (22) and the piston (12).