Abstract:
A plug and socket type connector for connecting two electrical leads has a flat-pin plug part (2) of a first standard size and joined thereto in one piece a socket part (1) of a second standard size. It therefore allows a plug and socket type connection between a conventional socket of a first standard size which is joined to a first lead and a flat-pin plug of a second standard size which is joined to a second lead.
Abstract:
A valve, especially a thermostatic expansion valve, has a setpoint spring (15) which bears on a plate (14) having a sloping face (19). A setpoint adjusting device (5) is provided in a housing connecting tube (4). The adjusting device has a pressure-applying piece (21) having a contact face (20) engaging the sloping face (19), is secured against rotation and has a threaded bore (22). An adjusting screw (27) which is supported on the connecting tube (4) against axial displacement engages in this threaded bore. In this construction, the connecting tube requires no machining.
Abstract:
A hydraulic control system (1) for work vehicles including a control unit (2) to control the steering wheels of a vehicle via a cylinder (3) and a priority valve (4) which by means of a first load-sensing system (LS1) controls the pressure fluid flow to the control unit (2) and to a subsequent proportional valve group (9a-9c). By means of a second load-sensing system (LS2) the proportional valve group (9a-9c) controls the pressure fluid flow to secondary hydraulic motors (10) or work cylinders (11, 12) to control the work tools of the vehicle. The control system (1) also includes an open-centre valve connection (6) and a fixed displacement pump (8). The first load-sensing system (LS1) is connected with a second load-sensing system (LS2), whereby drop-off of the pressure fluid flow to the control unit (2) is avoided at simultaneous operation of the latter and of one or several of the proportional valves (9a-9c) as it is the case with known control systems. Hereby a control system is provided which is particularly agreeable to operate for the driver of the work vehicle.
Abstract:
A radial journal bearing (5, 6) is indicated, with an interior bearing surface placed facing an exterior bearing surface, where one of the bearing surfaces comprises a slide shoe (7, 8), which has one end with a contact face loaded to contact against the other bearing surface, and where this end is movable in such a manner that the contact against the other bearing surface can be maintained by a relative displacement of the bearing surface at right angles to the direction of the load. Hereby it is achieved that the variation of the leakage between the slide shoe and the opposing bearing surface is essentially reduced, resulting in longer life and greater stability.
Abstract:
A hydraulic piston engine (1) driven by a lubricant-free, water-based pressure fluid, and comprising an enclosing housing (2) and a piston-connected drive shaft (6) supported by radial journal bearings in bearing bushings (9). One of the sliding surfaces (8) of the radial journal bearing comprises a recess (11) with a bearing-supporting hydrostatic pressure fluid pocket. The centre of the recess (11) is displaced by an angle ( alpha ) in the direction against the direction of rotation of the drive shaft (6), seen in relation to the geometrical, radial mean point in the high-load area for transmission of the piston forces to the bearing surface (8) via the drive shaft (6). Hereby a particularly reliable piston motor of the type indicated is provided.
Abstract:
A pump arrangement (1) for an oil burner has a connection (6) at which oil is delivered at a constant pressure, and a device for creating a modulated pressure, in particular a modulation valve (18). A change-over device (21) applies the constant or the modulated pressure selectively to the connection (6). A method for regulating the capacity of an oil burner operates with a first power level, which may be switched on and off and which delivers oil at a constant pressure to the atomizer unit (2), and with a reduced second power level in which oil is delivered at modulated pressure. In this manner, power regulation can be effected without the oil burner having to be switched off.
Abstract:
A hydraulic machine with two displacement elements (2, 3) rotatably movable relative to one another, namely, a gearwheel (2) and an annular gear (3) of which the number of teeth is one more than the number of teeth (N) of the gearwheel (2), in which machine the tooth form of at least one displacement element (2, 3) is defined at least over sections by a trochoid-type curve T = f (RC, E, RT) as the function of a reference circle radius RC, an eccentricity E and a generating circle radius RT. In a machine of that kind, it is desirable for the efficiency and the running behaviour to be improved and for wear to be reduced. To that end, of the parameters (RC, E, RT) determining the function f, at least one parameter varies in the circumferential direction periodically with the period of a tooth pitch (Z).
Abstract:
An end flange (1) of a hydraulic machine is disclosed, with an inlet connection and an outlet connection (8, 7) and an inlet "kidney" and an outlet "kidney" (13, 11) which are arranged in a path of movement of an opening (6) of a cylinder movable relative to the end flange and are in fluid connection with the inlet connection (8) and the outlet connection (7) respectively. In an end flange of that kind, it is desirable to improve the flow behaviour so that fluids other than oils can also be used as hydraulic fluid. For that purpose, the inlet connection (8) emerges into the inlet kidney (13) at the start of the inlet kidney (13) in the movement direction of the cylinder.
Abstract:
A pressure-applying arrangement in a hydraulic axial piston machine is disclosed, having a pressure plate (7) and a piston (9) that is axially displaceable in a cylinder body (3), is biased by a spring (10) and acts against the pressure plate (7). It should also be possible to use such a pressure-applying arrangement when the axial piston machine is operated with a hydraulic fluid that has no or only very little lubricating property, for example, water. For that purpose, the piston (9) is formed from a high-strength thermoplastics material.
Abstract:
A spiral compressor (101') is described. It is desired that a spiral compressor of that kind be simple to manufacture, be of small size and low weight and at the same time have a high efficiency. For that purpose the spiral compressor (101') comprises an arrangement of spiral elements consisting of two spiral elements (2', 3) that are periodically movable relative to one another. Furthermore, a fluid motor (104', 105') driven by a fluid under pressure is provided, which forms a closed unit with the arrangement of spiral elements (2', 3).