DE2120141A1 - Pneumatically operated starter - Google Patents

Description

Patent attorney

Tel. 0 6172/41761 My reference: P 7116 Your letter: Your reference:

6381 Ober-Erlenbach ²² ' ^A P ^ril

In front of Schanz 8

Albert FAUX

27, Allee de Cormeilles SANNOIS (France)

Pneumatically operated starter.

The invention relates to a pneumatically operated starter for automatic remote starting of heat engines by means a pneumatic start-up device.

Some heat engines, such as gas turbines, are provided with pneumatic starters. So can a circulation heat engine can be started with a cylindrical gear reduction by compressed air. The attack pinion is for the starter under the action of a pneumatic Hegel device axially displaceable and then transmits the drive to the

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- 2 ring gear of the drive wheel of the heat engine.

The required compressed air is an auxiliary container or taken from an existing compressed air network, for example in mines, quarries, shipyards or other industrial facilities is available.

Even with generators and auxiliary systems for these one knows automatic, pneumatically operated starting devices for tfarmekraft- ™ machinery. These devices are often electromechanical

trained and usually extensive. They often cause difficulties in operation, too for example, there is a risk of short circuits when working in a dangerous atmosphere, which can then lead to an explosion. The use of electric control devices also allows for quick repairs without skilled workers are not possible. These known designs also have the man gel that they are sensitive to vibrations are.

There are also pneumatically operated starting devices for internal combustion engines, but that too are extensive and complex in construction.

The training according to the invention avoids the deficiencies inherent in the known proposals and leads to a pneumatic one Starting device for heat engines, which are simple in construction, operationally reliable, is not very extensive and is characterized by high operational reliability excels. The training according to the invention

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requires little maintenance. The dismantling and exchange of individuals Parts can be done by assistants in the event of a malfunction .

The pneumatic device according to the invention gives the possibility remote starting with a heat engine any pneumatic or electrical signal, such as For example, if there is no electrical current in the event of a breakdown, or if the heat engine is stopped in the event of another signal, if, for example, the electricity flows again. With the training according to the invention there is also the possibility of the pneumatic starter stop when the heat engine is effectively started or when starting is only for a predetermined time. The starting device according to the invention can also be equipped with an alarm device be provided, which starts automatically for example in the event of an unexpected stop of the ifärmekraf tmaschine and before the power connection again is made.

The new device according to the invention comprises a main valve, which can be set up for remote control, for example by an electrical or pneumatic signal. This main valve supplies if it is open, a screw jack to control the distribution of the fuel for the heat engine. It supplies also a control valve for the speed regulation of the heat engine. This control valve is generally open and interrupts the pneumatic circuit as soon as the heat engine is activated has reached a certain speed. At the output of the control

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valve, there is a three-element logistical structure dynamic unit that provides the option of adjustable throttling as a "closed" function and "off" as a puncture. The first The input of the element "closed" is connected to the control valve with the interposition of the device for controllable throttling, a series connection being present. The second inlet of the element "closed" is directly connected to the control valve. The "off" element is connected in series with the output of the "closed" element and also directly connected to the control valve. The output of the element "off" is to the control device connected for commissioning the personal control device.

To put the new pneumatic starting device into operation the main valve is open. The starting device is either from the valve controlling the speed is stopped when the heat engine has started, or by closing the pneumatic circuit through the "off" element, the input of which receives a signal at the end of the delay.

In a preferred embodiment of the training after Invention, the output of the element "to" is connected to an alarm device that is switched on when the heat engine has not started after a predetermined time. The alarm device is also effective when the heat engine from any fails for a reason and the main valve remains open. Then the control valve opens and the alarm device is activated by the element

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"z-u" fed for the time of the delay.

According to another embodiment, the device according to the invention also comprises a manually controlled breaker above the main valve, which enables the supply of compressed air to be interrupted as quickly as possible and thus to shut down the AIaEmgerät again. An air filter can also be provided in series with the pneumatic circuit above the main valve to prevent contamination of the various valves and the Ιο- _Λ

^ istic elements prevented.

Kaca an advantageous embodiment is the invention Device fed by a pressure medium source, which supplies compressed air from 5-8 atü. This gives the opportunity to control the funds easy to put into operation for pumping the fuel, to put the pneumatic starting device into operation, without the need for power amplifiers.

Another embodiment is used to operate the pneumatic _

matic starter of the heat engine compressed air of about atü, which is passed through a pressure reducer, in which the pressure is then reduced to about 6 atü before the logistic Control units influenced.

Also, after a further modification in the training of the Invention ge conditions the detector valve above the second At the input of the element "closed", the delay element is then supplied from a main valve. A line

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device, which is connected to the output of the delay element, gives the possibility of supplying a safety device - "- direction, which works pneumatically and guarantees that the heat engine works well.

The device according to the invention is for better understanding on the basis of the embodiment shown in the drawing explained in more detail. This gives a pneumatic starting device for a group of electrical auxiliary seed drills or working machines again.

According to the drawing, the pneumatic starter 1 has an axially displaceable one Pinion 2, which by axial displacement engages with the ring gear 3 of a heat engine, not shown arrives »The pneumatic starter t is through a line 4 a pressure medium source with a voltage of JO atü can be connected. This high pressure compressed air of 30 atmospheres is through a line 5 connected to the inlet of a pressure reducer 6, with a manometer 7 is provided. In the voltage reducer, the voltage of the compressed air is reduced from 30 atmospheres to around 8 atmospheres. With this reduced voltage, the compressed air passes through a Line 8 to a manually operable breaker 9, which is shown in the basic position is open and from there to an air filter 10. From this a line leads to an electromagnetically controlled main valve 11, which is not energized in the event of a breakdown.

In this case the solenoid becomes automatic according to the invention

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excited. From the solenoid valve 11, the compressed air passes through a line 12 to a cylinder piston armature 15. This controls the fuel supply to the heat engine. The compressed air then passes through a control valve 14 for the rotational speed of the heat engine and arrives through a line 15 to a delay element 16, which is connected to one of the inlets 17 of the "closed" element 18. The element 16 comprises a collection chamber and an adjustable screw bolt which is used for the "closed" setting. The second input of the ^M to "element 18 is connected directly to the control valve by a line 19. The output of the ^w to ^M element is connected by a line 20 to an Alerm device 2 \ . The logistic" off " -Eleinent 22 is connected to a line? 5, through which it is supplied with compressed air. It is also connected to the ^M to "element 16 by a line? 4. A compressed air line 4 leads from this to a pressure control device 25. These three logistic elements 18, 2 and 25 form a logistic, pneumatic and dynamic system. These elements are very compact in structure and can be arranged on a common SocVel on which the various connections intersect. For example, commercially available logistical elements from the American company "ARO" can be used.

The above-described facility works as follows.

If the electromagnetic valve is open as a result of a breakdown, the heat engine via the piston unit + 13 with combustion-

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fabric supplied. Since the heat engine has not yet been released is, the valve 14 is also open. The compressed air reaches the Delay element that works like an accumulator and for does not emit a signal to the input of the element "zu" 18 for a controllable time. This element is therefore also present at its output no signal, so that the compressed air through the line 23 to the piston device 25 to the "off" element 22 through the line got. The piston device 25 comprises a main piston 7 and an auxiliary piston 28. The piston at about 8 atmospheres through the line 26 incoming compressed air actuates the piston 27. whereby the piston 28 is also displaced and the bore 29 is relieved. It can then compressed air of 30 ^ -tu through dip lines 5 »30 and 31 operate the pneumatic starter. Once dip heat engine When it is running slowly and running slowly, that closes the speed determine valve 14 to supply compressed air and thus terminates the activity of the starter before the alarm device 21 is put into operation.

If, on the other hand, the heat engine does not start and theirs If the speed is not sufficient to actuate the valve 14, the valve will remain open. Operated after an adjustable time Then the delay element 16, the input "to" of the element 18, which then emits an Ausgenirssignal and via the line 20 that Brings alarm device 21 to Ansnrechen.

The "closed" element simultaneously supplies the input of the "off" element 22 via the line 24. This outputs a zero signal to the

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Exit and the piston? 7 returns to the basic position. He takes with the completion of the pneumatic starter. The from Hand operated breaker 9 gives the possibility of the alarm device to be switched off or, if necessary, by terminating the supply from compressed air to an emergency shutdown.

As soon as the breakdown in the power supply is rectified, it interrupts Main valve the supply of compressed air to the piston device 13, whereby the heat engine is shut down. The establishment is then ready for a new start.

If the heat engine comes to a standstill for some other external reason, if the failure of the electrical current has not yet been remedied and the main valve oven remains and delivers further compressed air, the control valve He ₅ Bs closes then a new start-up, as described above, tried, and d. ^Q s alarm device? 1 is activated if the heat engine has not restarted after a certain delay.

The device according to the invention consists in the above-described execution? ms a small box that contains all the items shown includes in sicn. In the box are the inlets and outlets of the air lines that connect to the various Elements are connected and which are close to the heat engine are arranged.

The device according to the invention can be used with all thermal power plants that should be started automatically

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and be controlled remotely. It is particularly beneficial to that Driving electrical power plants in hospitals, in public power plants or the like, especially in the event of partial failures »In particular is of interest the application in propeller engines or other auxiliary power machines for national purposes. Finally, the device according to the invention can be used for all explosion-proof Motors are used, the particular advantage then being the use of compressed air as a starting means.

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Claims (1)

Claims ι ( 1. pneumatically operating starting device for heat engines, characterized by a main valve (11) which supplies compressed air and controls a distribution command for the fuel of the heat engine, a detection valve (14) which is controlled and connected downstream of the main valve (11) and which closes the circuit, as soon as the ¥ ärmekT-aft machine has reached a certain speed, three logistic, pneumatic, and dynamic elements (18,? 2, 25), which are arranged after the discovery valve (14) and di ° a delay, a "closed" - or cause a "^ us" circuit and a line (26) which connects the output of the "off" switching device with the device controlling the start-up of the starter. 2. Pneumatically controlled starting device according to claim 1, characterized in that the delay device (16) is connected in series with the first input of the "zu" -device (1S), at its outlet in series the "off" device (22) is connected directly through the discovery valve (14}. 5. Pneumatically controlled starting device according to claim 1, characterized by the fact that the delay line (i6) with the first inlet of the "closed" element - 1 2 - 109845/1364 2120U1 (18) connected in series and at the outlet of which the "off" element (22) is connected in series, which on the other hand is directly communicates with the main valve (ii), while the Discovery valve (14) in series with the second inlet of the "to" element (18) is connected and that also a line to the Outlet of the delay device (16) with a monitoring device (25) connects to run the heat engine. 4 · Device according to one of the preceding address, characterized by a Leitimg (24) which the Output of the "to" device (ΐδ) directly to an alarm device (21) connects. 5 · Device according to one of the preceding claims, characterized in that the main valve (ii) is electromagnetically controlled. 6. Set up according to one of the preceding requirements, d a through characterized in that it is used to supply compressed air with a voltage of 3-8 atü. 7 · Device according to one of the preceding claims, characterized in that the main valve (ii) a manually operated switch (9) for the supply of compressed air is upstream. · 8. Einri ^ h tune according to one of the preceding claims ,, d a d-. characterized by that the main valve - 13 - 109845/1364 _ ₁₃ _. 2120U1 • (11) an air filter (to) is arranged upstream. ' 9 · Device according to one of the preceding claims, characterized by the use of compressed air with about 3Ü atü, with all devices and facilities a pressure reducer (6, 7) is connected upstream, which brings the working pressure of the compressed air down to 5-8 atü. 1098A5 / 1364 Blank page