摘要:
Eine Kupplung (1), die insbesondere nach dem Prinzip einer Oldham-Kupplung zum Koppeln einer Hochdruckpumpe mit einer Zahnradpumpe dient, umfasst ein erstes Kupplungsstück (2), das einen Zweiflach (4) aufweist, und ein zweites Kupplungsstück (3), das einen Kupplungsschlitz (5) aufweist, in den der Zweiflach (4) des ersten Kupplungsstücks (2) zumindest teilweise eingreift. Hierbei ist in einem Druckbereich (17), in dem der Zweiflach (4) des ersten Kupplungsstücks (2) zur Übertragung eines Drehmoments zwischen dem ersten Kupplungsstück (2) und dem zweiten Kupplungsstück (3) eine Innenseite (19) des Kupplungsschlitzes (5) des zweiten Kupplungsstücks (3) beaufschlagt, die Innenseite (19) des Kupplungsschlitzes (5) mit einer konvexen Kontur (20) ausgestaltet. Hierdurch kann ein Kontaktdruck zwischen den Kupplungsstücken (2,3) durch eine angepasste Kontaktgeometrie verringert werden.
摘要:
A screw compressor is connected to a motor to be driven by the motor even during periods of low compressed air consumption. During such periods, the screw compressor is at least partially unloaded to make it easier and less costly to drive the compressor. The unloading is performed by removing air from the compressor. Preferably, that is done by communicating the air inlet of a small capacity vacuum device with the air outlet of the screw compressor. Suction from the vacuum device is transmitted to the air outlet of the screw compressor to suck air out of the screw compressor to reduce the engine horsepower needed to rotate the screw compressor. The vacuum device can also be used to boost the air volume and/or the air pressure. The system can be used in a drilling rig which drills holes in the ground. The screw compressor can be unloaded during start up of the motor by briefly driving the vacuum device by pressurized liquid from a pre-pressurized hydraulic accumulator.
摘要:
A screw compressor is connected to a motor to be driven by the motor even during periods of low compressed air consumption. During such periods, the screw compressor is at least partially unloaded to make it easier and less costly to drive the compressor. The unloading is performed by removing air from the compressor. Preferably, that is done by communicating the air inlet of a small capacity vacuum device with the air outlet of the screw compressor. Suction from the vacuum device is transmitted to the air outlet of the screw compressor to suck air out of the screw compressor to reduce the engine horsepower needed to rotate the screw compressor. The vacuum device can also be used to boost the air volume and/or the air pressure. The system can be used in a drilling rig which drills holes in the ground. The screw compressor can be unloaded during start up of the motor by briefly driving the vacuum device by pressurized liquid from a pre-pressurized hydraulic accumulator.
摘要:
Die Erfindung betrifft eine Mehrfachpumpe (1), umfassend eine erste Pumpenkammer (2), eine zweite Pumpenkammer (3) und mechanische Verbindungsmittel (5, 5', 5"', 5"') wobei jedes der Verbindungsmittel (5, 5', 5"', 5"') sich über eine axiale Länge der ersten Pumpenkammer (2) und der zweiten Pumpenkammer (3) erstreckt und die Verbindungsmittel (5, 5', 5"', 5"') die erste Pumpenkammer (2) mit der zweiten Pumpenkammer (3) auf einer gemeinsamen Axialachse verbinden. Die erfindungsgemäße Mehrfachpumpe (1) zeichnet sich dadurch aus, dass weiterhin Dämpfungsmittel (22, 22', 22", 22'") vorgesehen sind, welche jedes Verbindungsmittel (5, 5', 5"', 5"') axial und radial mindestens anteilig einfassen. Die Erfindung betrifft weiterhin ein entsprechendes Getriebe (18).
摘要:
The invention relates to a device for the fuel supply of an internal combustion engine, comprising a high-pressure radial piston pump (1) having a drive shaft (2) which is accommodated therein and rotates about an axis with a cam or eccentric element (3) protruding radially, with which at least one piston (5) accommodated in a cylinder (4) is engaged, said pistons being displaceable by the cam or eccentric element (3) in the radial direction. A low-pressure unit (6) with a gear pump (7) attached thereto is fixed to the side of the high-pressure radial piston pump (1), which faces away from the internal combustion engine, wherein the low-pressure unit (6) comprises the connecting lines on the low-pressure side, the connections of the high-pressure radial piston pump (1), the connections of the feed line (7) and the return line (9) of the gear pump (7) as well as the feed line (10) and the return line (11) of the fuel supply.
摘要:
The invention relates to a high-pressure fuel pump for operating an internal combustion engine, having a pump housing (3) in which a pump camshaft (1) is supported and which is connected to at least two pump pistons (5a, 5b) via a polygonal configuration (4), said pistons being guided in a displaceable manner in associated pump cylinder heads (6a, 6b) that are placed on the pump housing (3), wherein the rotating movement of the pump camshaft (1) is converted to translational movements of the at least two pump pistons (5a, 5b) in order to suction off fuel from a low-pressure circuit, compress the fuel to high pressure, and to convey the same to a high pressure storage, wherein further a low-pressure unit (10) that accommodates the low-pressure circuit is attached to the pump housing (3).
摘要:
There is provided a multiple pump unit including a pump shaft, a first pump, a pump housing, a second pump and a fluid passage block connected to one end surface in an axis line direction of the pump housing. One or both contacting surfaces of the pump housing and the fluid passage block is formed with a concave portion for accommodating the second pump. The pump housing is provided with a suction fluid passage guiding hydraulic fluid to a suction opening of the first pump and a first pump discharge fluid passage having a distal end that forms a first pump discharge port. The fluid passage block is provided with a second pump discharge port having the second pump as a hydraulic source.