Method of operation of self-contained power station

FIELD: engine manufacturing.

SUBSTANCE: invention relates to method of operation of self-contained power station powered by diesel-generator set. According to proposed method of operation of self-contained power station powered by diesel generator set equipped with additional flywheel and disconnect clutch with automatic control members, additional flywheel is mounted on separate shaft which is connected with diesel-generator set by means of disconnect clutch. Preparatory operation is carried out to set power station into operation with subsequent overcoming of short-time starting resistances from consumer. Additional flywheel is connected to shut down diesel generator set by means of disconnect clutch. Power station is started under no load, and its coming to rated speed is detected by readings of generator shaft speed pickups. Load is connected and intensity of generator shaft speed drop is checked. Information is automatically transmitted to controller wherefrom, at termination of generator speed drop, signal is transmitted to disconnect clutch, and rotating additional flywheel is disconnected from diesel generator set, thus changing the set for accelerated mode of restoration of initial rated speed.

EFFECT: provision of power saving operation at stable conditions for overcoming designed resistance torque and short-time overloads exceeding capabilities of chosen supply source.

1 dwg

 

The proposed object relates to the field of synthesis and functioning of Autonomous power plants serving consumers, workflow, which is associated with possible short-term appearance of sharply increasing resistance, the overcoming of which makes us look special for this solution. The simplest, seemingly, the solution consists in selecting the power supply, high power, however, to overcome temporary overloads that would be uneconomical. Therefore, the task consisted in finding such a technical solution that would efficiently work on sustainable modes of overcoming the calculation of the moments of resistance, which is selected power source power, and at the same time, the proposed facility must overcome short-term overload greater than the selected power supply source.

Our stated objective is relevant to many industries, but the most important it takes for drillers [1]based on gazoneftyanykh deep shallow wells, the drilling process which involves performing a number of activities, one of which, its significance and need for this energy is the provision of rotation of the downhole tool in the well with endurance the som destroyed breed there, and the simultaneous strengthening of the side walls of the well. And all this is done by using the mud pumps, which pump the mud into the Central hole fixed in the well pipe string and serves this solution in the limit downhole motors-turbodrills, which krepjat acting on the rock cutting tools. This is a feature of this drilling process is associated with different types of loads on mud pumps, which are dependent on a number of factors, resulting mud pumps should potentially develop pressure solution up to 40 MPa, although the main work is carried out at a pressure of 20-25 MPa.

Hence, we choose the system of Autonomous power mud pumps should be more adaptive to changing drilling parameters.

The prior art in the field of Autonomous energy supply different in purpose allows consumers to stay on the power supply system [2], including interconnected releasing the clutch the engine and the generator and attached to the other end of the output shaft of the generator flywheel. The peculiarity of this system is that it is combined and able, due to included elements of automatic control, to operate from the external power grid, when releasing the clutch off, the engine is stopped and the generator will which replaces the function of the synchronous compensator, and offline provide electricity when changing parameters of a current in the external power grid, a generator, the rotor of which is left unwound from the energy of the flywheel, automatically reverts to its work with connection by releasing the clutch to the internal combustion engine. And yet, despite this universality of his work, this system does not meet set us the task of its response to significant fluctuations of the load, and when the system only works in offline mode power supply. However, its structural characteristics of the system [2] is considered as the closest analogue of the prototype.

The problem is solved as follows.

In the method of operation of Autonomous power by its diesel generator set, equipped with additional flywheel and releasing the coupling elements of the automatic control according to the invention, additional flywheel is placed on a separate shaft, which is connected with diesel-generator unit by releasing the clutch, and to enter the plant for subsequent overcoming her high transient inrush resistance from consumers, conduct preparatory operation, cognac stopped the diesel-generator unit with releasing couplers connect additional flywheel then the power plant running without load and the sensor shaft speed of the generator monitor its output at rated speed, and then include the load and keep the already intensive drop in speed of the generator, and the information about it in automatic mode and passed to the controller, where, at the end of the fall speed of the generator signal for releasing the clutch and otstegivayut additional rotating the flywheel from the diesel-generator unit and thereby transform this unit into the Overdrive mode, restore it to its original rated speed.

The proposed system is schematically represented in the drawing. It includes a frame 1 on which are mounted and interlocked to each other via a detachable coupling 2 diesel engine 3 and the generator of electric current 4. In bearings of the frame 1 is equipped with a flywheel 5, the shaft 6, which by releasing the clutch 7 is connected with one of the shafts permanently interlocked unit: diesel generator.

In this case, for planting clutch 7 is chosen opposite to the second engine output shaft end of the generator 4. In principle, it is possible another solution, if the flywheel 5 with the shaft 6 be located to the right of the generator 4, and to the left of the engine 3.

In addition to the above elements, the proposed volume of the t is equipped with automatic tracking in the form of a speed sensor 8 of the shaft of the generator and controller 9 with its signal channels “a”, “b” and “C”, which connect the element 9, respectively, with elements 8, 7 and with the operator of the energy consumer.

Functions of the proposed power supply system as follows. So when drilling relatively shallow depths where the pressure is coming out of a mud pump mud enough averages (20-25 MPa), the system operates in its nominal mode disabled when releasing the clutch 7 and not rotating the flywheel 5. In periods prior to the emergence of higher moments of resistance in the drilling process (usually this is due to the launch of the pumps under load), and, if necessary, to further improve the discharge pressure of the solution and expended by the pump capacity should be made preparatory operation: stops the diesel generator, the inclusion of releasing the clutch and start the diesel generator at no load with the promotion of the flywheel 5. And only after a full spin of the rotor of the generator 4 (which is also a kind of flywheel) and additional flywheel 5, when the shaft of the generator will be given the maximum possible rotational moment, make the engine start - mud pump. Thus the starting torque will be perceived diesel, and be overcome with the help of flight mass generator rotor and flywheel (stored kinetic energy). All this is inevitable is about to be accompanied by a decrease in shaft speed of the generator and flywheel and at the same time by increasing the fuel supply, will increase the torque of the diesel engine. When reducing the speed of the generator will stop and the controller will record it on channel “a”channel “b”, the controller will issue a command to olstykke flywheel in order not to overload the diesel engine more torque and to reduce the transition period of recovery to full speed.

According to the applicant, the proposed facility has all the criteria of the invention. “Industrial applicability” or, in other words, the possibility of its implementation, should not be obvious from consideration of the drawing and the description of the operation of this method, and the feasibility of its use is determined by the need gasometrical in effective systems of Autonomous power supply of drilling equipment.

The criterion of “inventive step” is confirmed by the proposed set of features operations and their sequence of implementation: namely, the inclusion of additional flywheel and accumulation rotating system of additional energy, then return it to the customer, followed by disconnection of the rotating flywheel and restoration of the rated speed of the generator. Note that the system could work and constantly costacabana with a diesel generator is gravatom additional flywheel. In addition, when constantly dock flywheel generator output at rated speed, when the load shedding would be longer and less wasteful.

As these achievements are not known from the patent and technical literature, this leads us to conclude about the presence in the sentence of the criterion of “novelty”.

The sources used in literature

1. Menshov astray freight and other Electrical devices rigs. Ed. “High school”. 1986

2. Manual with an album of drawings. Uninterruptible power supply system automated ASGP-630M. P.O. Star. Leningrad, 1984

The method of functioning of the power plant by its diesel generator set, equipped with additional flywheel and releasing the coupling elements of the automatic control, characterized in that the additional flywheel is placed on a separate shaft, which is connected with diesel-generator unit by releasing the clutch, and to enter the plant for subsequent overcoming her high transient inrush resistance from consumers spend preparatory operation, when it stopped the diesel-generator unit with releasing couplers connect additional flywheel,after which the power plant is run without load and the sensor shaft speed of the generator monitor its output on rated speed, then include the load and keep the already intensive drop in speed of the generator, and the information about it in automatic mode and passed to the controller, where at the end of the fall speed of the generator signal for releasing the clutch and otstegivayut additional rotating the flywheel from the diesel-generator set and transfer the unit into the Overdrive mode, restore it to its original rated speed.



 

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