RU2731341C2 - Working system of spacecraft correction with remnants of working gas body completely running out from high-pressure tank - Google Patents

Abstract

FIELD: machine building; measuring equipment.

SUBSTANCE: invention is a technical solution of physical quantity sensors failure-free operation under conditions of high pressure and gas-dynamic impact. Working system of spacecraft correction with fully generated from high-pressure tank remains of working gas includes high-pressure tank with working gas, main lines, instrumentation and control, actuating working element, pneumo-cylinder made of material with elastic properties, located in tank cavity, temperature sensors protection device, high and low pressure working gas sensors from high-pressure waves in main lines. Initially, in the pre-operation state, inside the unregulated working gas tank there is a pneumatic cylinder shaped as a tank with supercharging gas, the initial pressure of which is not less than working pressure in the actuator of the working system.

EFFECT: technical result is exclusion of unusable working medium residue in tank.

1 cl, 2 dwg

Description

The invention relates to mechanical engineering, namely, to storage and distribution of gases and measuring equipment and can be used in various fields of industry, where working systems (PC) are used with a non-renewable supply of a working fluid-gas (RTG).

The present invention is directed to the complete generation of RTGs from the spacecraft (SC) correction capacity PC (EPC). The proposed invention can be applied to all PCs with EPC.gaseous RT, working lines, instrumentation and an executive working body.

Known solar concentrator (RU 2044225 C1, IPC F24J 2/06), containing a template, a deforming plate with a working surface, fixed on a template along a reference circle by means of a rim with the formation of a geometric strip, and a means for controlling the curvature of the surface of the deformable plate, with a channel made in the template with a pipeline installed in it, connected to a device for creating an overpressure, characterized in that the solar concentrator additionally contains at least one pneumatic cylinder made of a material with elastic properties, located in the cavity between the plate and the template and connected to the device for creating overpressure by a pipeline equipped with control valves for supplying and venting the working medium in the pneumatic cylinder, while the working surface of the plate is made from its outer side, the means for controlling the curvature of the deformable plate is made in the form of two signal sensors connected to the control valves and installed located in the zone of maximum bending of the plate, the non-working surface of the plate is made conductive. This technical solution is taken as a prototype.

The essence of the prototype consists in the presence of such a distinctive feature as a gas cylinder made of an extensible elastic material inside a sealed cavity between the wrong side of a plate (film) reflector and a metal template disk on which a frame is attached with a plate (film) reflector attached to it. Inflating or deflating the balloon changes the pressure level inside the sealed cavity, which leads to accurate focusing of the reflector mirror.

The prototype, in principle, gives good results, offering an original technology for regulating the pressure in a sealed cavity, which can be EPC. The disadvantage is that the technology is somewhat costly in relation to the price. Following the prototype, it is necessary to have an additional container that has a charge gas supply outside the EPC, a system for filling this container, channels for supplying boost gas to the air balloon inside the EPC, and through-flow valves. In the technical world, there is a demand for a method or device capable of squeezing RTGs out of a PC "to a drop", while maintaining the full operability of the latter and, importantly, making it possible to accurately predict the end of service life (ES) of a PC. Consider, for example, a geostationary spacecraft correction system. RTG - xenon (Xe).

To ensure that you have a minimum supply of RTGs. it is necessary to know its value with an error of the order of 10% or less. Pressure sensors on strain gauges and temperature sensors have a very satisfactory basic reduced error - 1.5%. However, if for high pressure sensors in the range [0-250] kg / cm ^{2 the} absolute error is 3.75 kg / cm ² , the relative measurement error of such a sensor at the end of the intermediate stage of operation PC will be for the above example (when the operating pressure at the inlet in the engine is 2.5 kg / cm ² plus 0.5 kg / cm ² for the rate of RTG pumping through the pressure reducer) 125%. If you simply install the low pressure sensor next to the high pressure sensor and wait until the pressure in the EPC becomes working for the low pressure sensor, the low pressure sensor will fail immediately after installation on the fuel line.

For the production of RTGs to be deterministic, three conditions are necessary.

The first is the RTG pressure and temperature sensors, the readings of which make it possible to monitor the PC state and calculate the residual RTG with acceptable accuracy, in addition to the standard reliability of their structures, they must be protected from gas-dynamic (possibly hydraulic) shocks. Failure of the sensors leads to the fact that it is necessary to predict the end of the ESS PC based on the nominal rate of RTG consumption inherent in this class of the PC executive body. At the beginning of the EPC PC, the static pressure in the EPC and mains can reach the order of hundreds of kg / cm ² .

Second, high pressure sensors at the intermediate and final stages of PC operation cannot be used in calculating the residual RTG, because the absolute sensor error, making up a certain percentage of the formal pressure range, is constant, the relative sensor error increases with decreasing pressure in the EPC, and at a certain real pressure level becomes unacceptably large. Therefore, in the PC device, along with the high pressure sensor, a redundancy of the pressure sensor with an operating range and basic reduced error should be provided, allowing the RTG remainder at the final stage of the intermediate stage to be calculated with an error of less than 10%. Such a sensor is installed on a section of the pipeline that is not subject to pressure transformation by reducers and other similar devices. Redundancy assumes complete isolation of the low pressure sensor from the pressure external to it in the line and de-preservation at a time when the pressure of the high pressure sensor equals the upper pressure rating from the operating range of the low pressure sensor. The moment of decommissioning should be considered the beginning of the intermediate stage of PC operation.

Third, the non-produced residue of the RTG should become generated by the creation of a special displacement system within the EPC. The unproduced residue of the RTG appears because, with the RTG lines fully open and in a vacuum, it, nevertheless, cannot completely exit the PC. In this case, at a certain low pressure, much less than one atmosphere, the RTG will always be present in the PC. Moreover, it will be present in the presence of significant external pressure at the exit from the PC. But more often than not, a significant non-produced residue is formed due to the logic of the operation of the pressure reducing reducer or the pressure stabilization unit, which are mandatory in the PC, since the executive working element, for example, the engine, cannot accept the RTG at the input under high pressure. From the moment when the pressure in the EPC equals the setting (working) pressure in the reducer, the reduction gear must become a boost. But this is impossible, since the filling of the RTG reducer is accompanied by compression of the spring-loaded devices, upon actuation of the contacts of which the inlet valves are closed. The RTG dose is being consumed. There is no pressure that could close contacts - there is no regular work of the executive body.

A gas-dynamic shock is a short-term, sharp and significant pressure surge in the pipeline resulting from a sudden change in the gas flow rate. Instead of impact, we use the general concept of a shock wave (SW). Methods and devices for protecting PCs from destructive hydrocarbons are known from the prior art. The first include, first of all, methods that do not require additional design loads in the PC structure:

a) a decrease in the speed of the RTG in the line due to an increase in its diameter; less speed - less energy - less pressure jump;

b) an increase in the response time of the shutter, valve.

The second - to devices, include:

1. Diaphragm expansion tank. In the process of increasing pressure, the piston moves by liquid or gas and the elastic element (spring or boost gas) is compressed by the membrane. As a result, the shock process is transformed into an oscillatory one. Due to the dissipation of energy, the latter decays rather quickly without a significant increase in pressure.

2. A piece of pipe made of elastic material. Materials capable of stretching will spontaneously extinguish the SW energy.

3. A damper (shunt) with a clearance of up to several tenths of a millimeter ((0.2-0.4) mm) as an insert in the process connection to pressure and temperature sensors. For example, pressure sensors MBS3200 and MBS3250. The shunt extinguishes the shock wave due to an increase in resistance - friction of the RTG against the walls of the shunt and friction of the turbulent layers of the RTG when passing through the shunt channel. During normal operation of the PC, the damper does not affect the criteria for its performance, but with a pressure surge it smoothly reduces the SW power. A small hole is only possible under sterile PC operating conditions. The damper usually requires a filter.

4. Special protective devices. These devices have special springs that are located between the valve and the sensor element. The spring is activated when the pressure rises. Thus, it prevents the valve from closing completely. When the SW force decreases, the valve closes smoothly on its own.

5. Receiver. It is just a technical vessel, large enough in relation to the cross-section of the line, a vessel for accumulating RTG and smoothing pressure drops in the PC.

This technical solution is a device, therefore we leave aside the methods of protecting PC from HC.

The most simple and absolutely reliable means of protection is the receiver. It is recommended to install the receiver both after the pressure reducer to damp fluctuations in the nominal pressure, and before it, immediately after the main outlet from the EPC, in order to extinguish the HC on the approaches to the pressure and temperature sensors. Temperature and high pressure sensors, often, apart from the safety margin of their design (often poorly correlated with the real impact of hydrocarbons)), do not have any other protective connections to them. But they are the ones that are most effective. This technical solution addresses a PC device using an RTG initially under high pressure. Therefore, personal protective equipment for sensors is included in the limiting part of the claims as a mandatory feature. This feature guarantees the safe operation of pressure and temperature sensors, which is necessary when calculating the RTG balance.

It is necessary to have a relatively low pressure sensor on the high pressure line in reserve, which is not used for the time being and isolated from the high pressure of the RTG in the line. The temperature sensor operates at the upper limit of the absolute temperature range, therefore the temperature measurement error remains unchanged and does not negatively affect the result of monitoring the RTG state.

The task is to create a device for the complete and predictable in time depletion of RTGs from the EPC. The solution to this problem is achieved by the fact that

1. PC correction of the spacecraft with residues of RTG completely generated from the high-pressure tank, including the high-pressure tank with the RTG, working lines, instrumentation, actuator, pneumatic balloon made of material with elastic properties, located in the tank cavity, protection devices for temperature sensors, high and low pressure sensors RTG from the shock wave in the mains, differs in that initially, in the pre-operating state, inside an unfilled RTG tank, a pneumatic cylinder is placed, with a shape similar to the shape of a tank, with a boost gas, the initial pressure of which is not less than the operating pressure in the PC actuator.

2. The PC according to claim 1, differs in that, along with the high pressure sensor, a low pressure sensor is installed at the outlet of the tank, tightly shut off by the valve from the pressure in the line, the valve has the ability to deactivate the low pressure sensor once.

The device for isolating the low pressure sensor and unblocking it has a mechanical or electrical valve or a blind partition that closes the approach to the sensor and is an integral part of the pyrovalve serving only the low pressure sensor. There are many such effective devices, they are known from the prior art and are quite suitable for this task. For the invention, only a fundamental approach matters - an isolation and unlocking device is installed on the PC to service the sensor, in this case, low pressure before the sensor is included in the working process at one of the stages of PC operation. which was not there before.

The problem is solved by using a rubber pneumatic cylinder with pressurized gas, placed in the EPC at the stage of its manufacture or refueling, with the expectation that at the moment of the complete development of the RTG, the pressure in the EPC would be equal to the setting (working) pressure in the reducer and in the PC executive body.

The task is solved by installing a low pressure sensor on the main line up to the reduction gear, backing it up to a certain point and then de-mothballing.

Regarding clause 2. According to the Recommendations on the examination of applications for inventions and utility models, clauses 1.6.2.2.1 (1) (19.5.3 of the Rules ...) are recognized as complying with the condition of the inventive step of the invention, based on the addition of a known means of any known part (s) connected to it according to known rules, in order to achieve a different technical result, in relation to which the influence of such additions has not been established, and therefore such distinctive features as the installation of a low pressure sensor in a relay link with a high pressure sensor at the outlet from the alternating pressure tank in complete isolation from the initial high pressures and the subsequent unlocking of this sensor, whose readings already make it possible to judge the specific residues of the RTG in the PC, meets the "inventive step" condition.

The essence of the invention is illustrated in FIG. 1 and FIG. 2, which show the schematic diagrams of the strain gauge pressure sensor and the PC device, respectively.

The claimed device works like this.

1. At the stage of filling the EPC (example):

- fill the EPC with an empty air spring. The rubber air spring has a one-time filling rubber hole of the union type. The nipple is a thick-walled bushing with internal and external threads. The fitting has a threaded external connection with a filler pipe connected by means of a hose to a compressor supplying boost gas. The nipple has an internal connection with the nipple device that admits the boost gas (nitrogen) to the air spring;

- pressurization gas is supplied through the tube to the pneumocylinder to the working pressure in the working executive body, not less;

- unscrew the filling tube, take a rubber threaded plug-washer, lubricate the thread of the washer with professional glue and screw the plug until it contacts the nipple device - the tightness of the pneumatic cylinder is guaranteed;

- EPC is filled with xenon through the standard filling hole 22 (Fig. 2). As the EPC fills with xenon, the air spring is compressed. The pressure inside and outside the air bellows is always the same. The pneumocylinder cannot receive any abnormal consequences at any xenon filling speed. When filling an EPC with a volume of, for example, 38 liters at a filling pressure, for example. 100 atm, we get the initial volume of the filled air balloon ~ 1 liter.

At the initial stage of PC operation, the residual RTG (or its consumption) is estimated by multiplying the total operating time of the PC executive body by the nominal second RTG consumption. By the middle of the SE of the PC, an error in the knowledge of the rest of the RTG accumulates, which often leads at the end of the SE to serious miscalculations in the use of the PC for its intended purpose. Working according to this technique, we will only know the calculated data, deliberately underestimated, since it is probably impossible to know the actual second RTG flow rate and predict RTG leaks due to the leakage of the stop valves 21 (Fig. 2). Leaks in calculations are taken to the maximum. This, for example, is almost nine months of operation of a geostationary spacecraft with an active life of 16 years. This approach to determining the residual RTG. nevertheless, it is sufficiently accurate at the beginning of the SE and is not necessary in the future until the de-preservation of the low pressure sensor, since when refueling the PC we have a general idea of the guaranteed SE PC. It is at the intermediate and final stages of operation that we will be interested in the presence or absence of additional opportunities associated with a specific residual RTG.

It is impossible to use a high pressure sensor to calculate the RTG remainder at the initial stage, since it would be necessary to use the equations of state of a real gas, where there are coefficients of state of a real gas, which are functions of intermolecular interactions: in each specific case of the state of an RTG, even the approximating functions of these coefficients are not constant. As soon as the pressure in the EPC becomes about 15 kg / cm ² or a little less (at this pressure, the gas can already be considered ideal and the Mendeleev-Cliperon formula can be applied to it), we deactivate the low pressure sensor operating in the range [0-15] kg / cm ² . The points on the graphs of state, containing 15 kg / cm ² , are at a sufficient distance from the transition zone, where the gas is steam. and are not third party to their respective functions displaying ideal gas conditions. Differences between a real gas and an ideal one begin to manifest themselves at distances of intermolecular radii (r) of the order of 10 ^-7 cm. At distances r equal to 1.7⋅10 ^-7 cm (corresponds to a pressure of 15 kg / cm ² ) the attraction is not so significant that it destroyed the forces of thermal motion of atoms and molecules of gas.

2. When the pressure in the EPC decreases to 15 kg / cm ² - ΔP _dvd , where ΔР _dvd is the absolute error of the high pressure sensor, kg / cm ² ), the low pressure sensor is de-preserved by opening the shut-off valve 13 (Fig. 2). The intermediate stage of PC operation begins. The calculation of the remainder of the RTG in the EPC is carried out based on the following equations of state for an ideal gas:

where p is the pressure in the line 12, in the EPC 9 and in the pneumatic cylinder 11, Pa;

V _epc , V _about - respectively the volumes of EPC and pneumocylinder, m ³ ;

M _rt , M _gn - respectively the mass of the RTG and the pressurization gas, kg;

R is the universal gas constant, 8.31 J / (mol⋅degree);

μ _RT , μ _gn - respectively, molar masses of RTG and pressurization gas, kg / mol.

3. When the pressure in the EPC decreases to the level of the working pressure in the working executive body (to the level at the outlet of the reducer 18 (Fig. 2) or (if there is one) - to the level at the outlet of the pressure stabilization unit), plus the value that allows the RTG without of practical delays to go into the storage tank of the reducer or (if any) the pressure stabilization unit, work with the PC stops.

Justification of the proposed solution

1. As an example, let us take the parameters of the PC correction, which has an electric propulsion system on board a spacecraft in geostationary orbit. There are several containers. We are interested in a single EPC. Its volume is, say, 38 liters, the mass of the RTG (xenon) is 70 kg⋅s ² / m, the pressure in the EPC is the operating pressure at the input to the correction engine 2.5⋅10 ⁵ Pa plus 0.5⋅10 ⁵ Pa at the rate of RTG pumping through pressure reducer, the average temperature of the RTG is 280 K. The boost gas 10 (Fig. 2) is nitrogen. From the equation of state of an ideal gas, we find the number of its moles:

We will have 4.9. Multiply by the molar mass of nitrogen, we get 0.069 kg. Let's multiply by the number of EPCs - by three specifically. We will have 0.206 kg (2 kg⋅s ² / m). These, almost 2 kg⋅s ² / m of nitrogen boost gas, are needed for the final stage of work with the spacecraft. If necessary, it is not difficult to increase the total mass of gas in EPC by less than 1%. Or increase the initial RTG pressure by 1%. Or do nothing.

Multiply 4.9 by the molar mass of xenon, we get 0.643 kg. Multiply by three, we have 1.93 kg (18.9 kg,9s ² / m). These 1.93 kg without nitrogen boost create a critical pressure of 3⋅10 ⁵ Pa. This mass is replaced in the present invention by the complete laying of the air bellows in the EPC cavity at the same pressure of 3⋅10 ⁵ Pa. This is the previously unexploited supply of RTGs. With a nominal xenon flow rate of 0.56⋅10 ^-6 kg / s and with normal operation of the spacecraft correction system, this margin is 957 hours of continuous operation of the correction engine (at least 16 months of normal spacecraft operation). This is sufficient for planning work at the final stages of work with the spacecraft, for carrying out final operations and for removing the spacecraft from the geostationary orbit.

2. For the implementation of this invention, it is impossible to use a positive pressurization system, including a bellows, since the initial, really large pressure will crush the bellows design, in any case, there is a high probability of an unrecoverable malfunction in such a positive system.

3. Consider the option of shunting sensors under high pressure conditions. It is known from the prior art that protective devices for control equipment and thermostats in water supply and heating systems, as an option, represent built-in additions to sensor mechanical or electrical devices containing a narrow flow path of communication with these devices. The channel diameter is well defined. It is up to 0.4 mm.

Poiseuille's formula (BM Yavorskiy and AA Detlaf, Handbook of Physics, 7th edition, p. 338) makes it possible to estimate the time of dynamic head with a pressure difference on both sides of the partition. We will consider the most critical option, when the RTG, under high initial pressure, suddenly and freely rushes into the empty, evacuated lines. Let's write this formula for a cylindrical pipe:

- секундный объемный расход жидкости (в нашем случае - газа), м³/с;Where

- second volumetric flow rate of liquid (in our case - gas), m ³ / s;

R is the inner radius of the pipe, m;

Δр is the pressure drop in a pipe section with a length of t, Pa

η - dynamic viscosity of liquid (in our case - gas), Н⋅s / m ² ;

L - pipe length, m.

A-priory:

where M is the mass, kg;

ρ - density, kg / m ³ .

The density ρ of the RTG is average between zero (vacuum) and the current pressure in the EPC.

It follows from (4) that

where ΔМ is the mass of the RTG penetrating into the input to the sensor and limited by its receiving capacity, kg.

Yet:

- средняя скорость теплового движения молекул (атомов) РТГ, м/с;

- average speed of thermal motion of RTG molecules (atoms), m / s;

- средняя длина свободного пробега, м.

- average free path, m.

Then:

As you can see, the problematic ρ is absent in equation (7).

СДАИ.406239.122 ТУ рассмотрим, какое количество РТГ поступит из магистрали в приемную емкость датчика низкого давления.Using the sensor as an example

SDAI.406239.122 TU let us consider how much RTG will flow from the main line to the receiving tank of the low pressure sensor.

СДАИ.406239.122 ТУ, приведена на фиг. 1. Датчик состоит из внешнего корпуса 1, внутри которого находится собственно корпус 2 датчика, внутри которого имеется пространство, заполненное демпфирующей жидкостью 3, в котором на твердом основании закреплено стеклянное основание 4 под рабочим телом датчика - кристаллом 5, обладающим тензоэффектом. Напротив основания 4 находится металлическая мембрана 6, являющаяся чувствительной стенкой пространства с жидкостью. Шунт 8 не входит в состав датчика, это, как было сказано ранее, технологическое присоединение, в данном случае - гипотетическое. Приемная емкость 7 (за входом в датчик до металлической мембраны 6) имеет объем 2,5⋅10^-7 м³. Для начального давления 100 кГ/см², объема единичного ЕРС 38⋅10^-3 м³ и средней температуры 280 К, согласно патенту RU 2572003 С2, определяющему формулу состояния газа при давлениях соизмеримых с критичными:A schematic diagram of such a sensor, like a high pressure sensor, say,

SDAI.406239.122 TU, shown in Fig. 1. The sensor consists of an outer housing 1, inside which there is a sensor housing 2, inside which there is a space filled with a damping liquid 3, in which a glass base 4 is fixed on a solid base under the working body of the sensor - a crystal 5 with a strain effect. Opposite the base 4 is a metal membrane 6, which is a sensitive wall of the liquid space. The shunt 8 is not included in the sensor; this, as mentioned earlier, is a technological connection, in this case, a hypothetical one. The receiving tank 7 (behind the sensor entrance to the metal membrane 6) has a volume of 2.5⋅10 ^-7 m ³ . For an initial pressure of 100 kg / cm ² , the volume of a single EPC 38⋅10 ^-3 m ³ and an average temperature of 280 K, according to patent RU 2572003 C2, which determines the formula for the state of a gas at pressures comparable to critical:

we get a mass of 10.5 kg. According to the M / V ratio for a volume of 2.5⋅10 ^-7 m ^3, we define ΔM equal to 6.9⋅10 ^-5 kg (6.8⋅10 ^-4 kg⋅s ² / m). Next, we determine the mean free path of molecules (atoms) of RTG (xenon):

where n ₀ is the number of structural units of gas per unit volume, m ^-3 ;

σ = π⋅d ² - effective gas-kinetic cross-section of the collision, m ² ;

d is 0.216 0,210 ^-9 m - the effective diameter of the RTG molecule (in this case, the xenon atom).

утверждение, что количество молей, а значит, и концентрация структурных единиц любого в химическом отношении газа одинакова в одинаковых условиях [p, V, T] состояния газа.Ideal for ideal gas, but enough for real

the statement that the number of moles, and hence the concentration of structural units of any chemical gas is the same under the same conditions [p, V, T] gas state.

равна 3,79⋅10^-9 м.We will have for the above parameters of the gas state 80 moles of RTG. This gives equal to 1.27⋅10 ²⁷ m ^-3 . Thus,

equal to 3.79⋅10 ^-9 m.

определяется из формулы:Value

is determined from the formula:

where k = 1.380622⋅10 ^-23 J / K is the Boltzmann constant;

m is the mass of a molecule (atom).

равна 212,1 м/с. Для расчета времени УВ по формуле (7) добавим Δр равное 100⋅9,8⋅10⁴ Па; радиус шунтирующего канала R равный 0,0005 м; длину шунтирующего канала 12 равную 0.025 м. Будем иметь τ равное 1,9 мкс при отсутствии препятствий за шунтом и 3,8 мкс при наличии датчика за шунтом. Это, конечно же, импульс. Средняя скорость 6579 м/с. Количество движения (ΔМ⋅ν) равно 4,5 кГ⋅с. Это почти в полтора раза больше начального количества движения пули калибра 5,45 мм массой 3,4 Г⋅с²/м (0,35 г). Отверстие в шунте в 1 мм не спасает от УВ. Но шунты с меньшим размером отверстия сами нуждаются в защите - на них надо устанавливать фильтры, которые на большом сроке эксплуатации не гарантируют проходимость шунтов. Итак, шунты в ответственных PC малоэффективны и даже вредны.For xenon, the mass of an atom is 2.20⋅10 ^-25 kg. Thus,

is equal to 212.1 m / s. To calculate the SW time according to the formula (7), add Δp equal to 100⋅9.8⋅10 ⁴ Pa; the radius of the shunt channel R equal to 0.0005 m; the length of the shunt channel 12 is equal to 0.025 m. We will have τ equal to 1.9 μs in the absence of obstacles behind the shunt and 3.8 μs in the presence of a sensor behind the shunt. This is, of course, an impulse. Average speed is 6579 m / s. The amount of motion (ΔM⋅ν) is 4.5 kg⋅s. This is almost one and a half times more than the initial momentum of a 5.45 mm bullet weighing 3.4 G⋅s ² / m (0.35 g). The hole in the 1 mm shunt does not protect against shock waves. But shunts with a smaller hole themselves need protection - they need to be fitted with filters that, for a long service life, do not guarantee the shunts' patency. So, shunts in responsible PCs are ineffective and even harmful.

The data in clause 3 are of a recommendatory nature and do not affect the essence of the proposed technical solution. It should be noted that if at the outlet of each unit EPC 9 (Fig. 2) and in front of each of the control devices of the responsible PC: high pressure sensor 15; low pressure sensors 17; With a temperature sensor 16, installed on the fuel line 12 on the way to the actuator 19, there are receivers 14, these devices have reliable physical protection from HC.

4. The material of the pneumocylinder 11 (Fig. 2) from the outside and from the inside is always exposed to equal pressures of the media separated by the wall, therefore, the gas permeability of the wall is practically equal to the gas permeability of solid crystalline bodies, and cannot be taken into account.

Claims (2)

1. Working system of spacecraft correction with residues of the working fluid-gas (RTG) completely generated from the high-pressure tank, including a high-pressure tank with RTG, working lines, instrumentation, an executive working body, a pneumatic balloon made of a material with elastic properties, located in tank cavity, protection devices for temperature sensors, high and low pressure RTG sensors from the shock wave in the mains, characterized in that initially, in the pre-operating state, a pneumatic cylinder is placed inside an unfilled RTG tank, with a shape similar to the shape of the tank, with a boost gas, the initial pressure of which is not less working pressure in the executive body of the working system. 2. The working system according to claim 1, characterized in that along with the high pressure sensor at the outlet from the tank, a low pressure sensor is installed, tightly closed by a valve from the pressure in the line, the valve has the ability to deactivate the low pressure sensor once.

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