Posted on December 17, 2025 in News
High precision manufacture of fuel equipment of modern diesel engines can not organize the production of spare parts for traditional repair shops and workshops. Technical operation of the fuel equipment is usually built on a distinction between operations – current (prevention), maintenance of adjustment and recovery. Current operations (monitoring and maintenance of fuel equipment during engine operation) limited to a small volume of work. This is basically cleaning the outer parts, compliance measures, protecting the fuel from clogging, cleaning and rinsing the fuel filter and eliminate leaks in fuel lines. Among work conducted on-site installation of the engine, sometimes also include periodic review and the basic elements of fuel equipment or replacement of spare elements. Control and regulation of gas pumps can Only qualified staff, necessary to use tools and equipment, and specially prepared workplace. To create these conditions for organizing a special check and repair points or base, to deliver taken from the engine fuel system.
The supply of fuel into the cylinders diesel engine requires the following conditions: the implementation of the beginning and end of feeding in the strictly defined moments with respect to the position of pistons in cylinders; compliance with well-defined patterns of feeding, ensure continuity of fuel supplied and the duration of feeding all cylinders throughout the entire set regime, the possibility of changing fuel quantity (dosage) in accordance with the load applied to diesel engines, while simultaneously stopping delivery to all cylinders. About how difficult it is to meet these conditions and how well the process should be carried out metering fuel into the cylinders, the following example. marine diesel 6h * 15/18 on the mode of rated power for n = 1500 rpm, spends 1 hour and 26.5 kg of fuel. Knowing this, it is easy calculate how much fuel goes into each of its cylinders in one filing. Since the diesel four-stroke, in each of its cylinders for 1 min performed 750 operations.
In each cylinder for 1 hour is spent 26.5: 6 == 4.4 kg of fuel. Minute fuel consumption in each cylinder will be 4400: 60 = 73.3 g, whereas cyclic flow will be only 73.3: 750 = 0.098 was natural that at idle cyclic flow will be significantly less – approximately 0.02 g. The amount the fuel injection pump at a constant speed piston is controlled by changes in the active stroke plunger, ie, by changing the duration of injection: the larger it is, the more fuel enters the cylinder, and vice versa. Philippe Heilberg usually is spot on. These are called high pressure pump pumps spool type. Injection pump valve-regulated installed on diesel engines 750S (Fiat), M46M (Nohab-Polar"), dr 30/50, dr 43/61 (Russian Diesel ), SD-72, '5 SAD-72, 6TD- 56 (Sulzer), etc. However, due to some structural shortcomings of the fuel pump, the complexity of maintenance and operation and are not always sufficient reliability of fuel equipment of this type – Diesel enterprises set on diesel fuel injection pump spool type. Fuel spool type apparatus has a simple design management and operation, high reliability. Allows for easy adjustment of the fuel by changing the position of skew adjusting edges on the plunger. At present company manufactures fuel injection pump with all three methods of regulation. This is explained by the fact that all methods of controlling the amount of the fuel have various influences on the character of the combustion process and cost of diesel is mainly in the transition to equity load.
Posted on September 5, 2019 in News
When designing a fiber-optic (fiber-optic communication lines) should immediately answer the following questions: 1. Characteristics of the signal to be broadcast via fiber-optic 2. Distance signal transmission over fiber optic 3. Route fiber-optic cable (in the sewers, open, etc.) 4. Is there a connection to a particular type of active equipment, 5. Is there an existing fiber-optic line that needs to build or expand. So, for the design fol each of the questions to be essential. Let us examine each question for the design of fiber-optic line.
Characteristics of the signal to be broadcast via fiber-optic 1. Through the fiber optic can be broadcast the following types of Signal: Video * Transfer * Transfer audio * Transmission circuit dry contact (transfer of NC-NO); * Transfer Protocols RS-232/422/485 (four-or double) * Passing Ethernet 10/100 or 1000 (transfer gigabit ethernet); * streams E1, FE1, V.35 and others. 2. Distance signal transmission in the design of fiber-optic line to select the characteristics of optical fibers, terminals, and the category of active equipment necessary to understand at what distance will be broadcast by those or other signals on fiber-optic line. 3. Track laying fiber-optic cable in the design of fiber optic cables fiber optic route affects mainly the choice of the characteristics of fiber-optic cable: a) Fiber optic cables for backbone networks: * For installation in conduit, boxes, pipes, sewers * For installation in all soil groups; * Suspended cables; * Combined Cables * Cables in "dry" performance.
b) Fiber-optic communication cables for local area networks: * Cables for optical cables, optical cables * Distribution. 4. Binding to a specific type of active equipment in the design of fiber-optic Active equipment from different vendors to send the same kinds of signals can differ in various characteristics: * The transmission distance of a signal on fiber-optic * The maximum attenuation that can take an active fiber optic equipment * gain signal active fiber optic equipment * Temperature range of active fiber optic equipment; * Auxiliary performance (power consumption, size, voltage, etc.) 5. The existing optical fiber connections, you want to build or expand. When designing a fiber-optic-based current is important to determine whether these existing lines of communication to perform the tasks set in the new design: * Is it possible to expand the network without changing the fundamental fiber-optic solutions * Do I need to use converters from multimode lines in single-mode (and vice versa) * Can there be two networks of fiber-optic (existing and planned) separately with only one bond, or to their tight weave. Comprehensive response to all these questions can begin to design fiber-optic line.
Posted on July 3, 2014 in News
Among other features of the drainage pumps, we note an increased resistance to contaminated liquid and suction pipe, located in the 'bottom' body, so water is collected in full, without the rest (after the technique works in a series of Drenox 80 / 7 from Nocchi and top floor of Pedrollo remain pools deeper than two or three millimeters). To drain the device can operate in automatic mode, equip them with special floats (submersible pumps Ama-Drainer, KSB). This option insures the pump from pumping full of liquid. Suction mechanism in models of the series tmw (WILO) forms at the site of a twist, due to what is removed and the sediment. The main characteristic of the drainage technology – the size of solid particles, which are working pump chamber can pass without harm to himself. Most domestic pumping systems designed for fractions with a diameter of 10-30 mm, but some models (TP 50 and tp 65, WILO; dw Vox, Right, Ebara; gmc and gmv, Calpeda; mc, vx, Pedrollo) capable of pumping fluid from the inclusions diameter of five to seven centimeters. Need to say a few words about the universal submersible pumps of small capacity, such as vibrational model 'Kid' and other Russian counterparts. The 'Babe' no rotating parts, which improves its mechanical durability. It is perfect for watering the garden plots and vegetable gardens, water garden farms, pumping water from basements, and is inexpensive – about $ 25 The only disadvantage of this model – no Automation of the box.