DE1813803A1 - System with flow machines - Google Patents

Description

PATENT LAWYERS

DIPL.-ING. GONTHER KOCH DR. TINO HAIBACH

MUNICH 2, December 1968

OUR MARK: H / 19 "

The English Electric Company Limited, London, England. System with flow machines

The invention relates to systems, the rotating machines working with an elastic or hydraulic fluid e.g. blowers, fans, compressors, pumps and turbines, with the machine housed in a housing having a fluid inlet and a fluid outlet connected to a first fluid are connected to the room or rooms with which the machine is in communication, and wherein the machine is removably mounted in the housing and can be withdrawn into a second space which is outside the system is, and the arrangement is made such that the inlet and the discharge of the st position in operation second space are separated and closure means are provided for the inlet and outlet to the first fluid to seal the containing space from the second space when the machine is withdrawn from the housing.

Such a system is to be identified in the following as "the system of Art ". Such a system is described in British patent specification 1 017 961 and the The present invention is concerned with an improvement or modification of that contained in said British patent specification Invention.

909843/1048

The housing can be of any suitable shape: In the embodiment according to British patent specification 1 017 961, it is a cylindrical saSpöligeiiiäuse, in which a Fan was stored removably. However, the housing can also have a more complicated design and include lines, which include inlet and outlet and means for supporting the machine can be connected thereto at the same time. A An example is a concrete pressure vessel for a gas-cooled nuclear reactor, with a removable motor-pump unit in a hole is stored in the wall of the vessel and the line system then a cooling gas from part of the reactor cooling circuit Fan leads and then to another part of the cooling circuit. The essential requirement of such an installation is that when the motor-pump unit out of the hole is removed, as far as possible no cooling gas should flow out through the hole into the atmosphere. When the unit is in the hole it prevents gas from escaping in by itself the atmosphere and there will be a gas pressure inside the reactor maintained: The closure means must be arranged so that the hole or that part that is in contact with the atmosphere is sealed from the cooling circuit when the unit is removed. In the example mentioned above, it will be necessary to shut off the inlet and outlet in certain ways "

"Inlet" and "outlet" are understood to mean all openings or conduits in the housing through which a fluid passes from the first room or any of the first rooms the machine.

According to the invention, in a system of the type described, the machine is equipped with adjustable guide vanes and an actuator which is movable between a first position, in which the guide vanes are adjusted , and a second position, in which the closure means come into effect .

909845/1048

Preferably, the closure means consist of a valve that is axially movable between an open position and a closed position and a free flow in the open position allows and shuts off this flow in closed position, with the valve is connected to a rotatable member which, in the second position of the actuating member, is coupled to the latter, such that the actuator is rotated accordingly, whereby the valve is axially displaced.

The rotating component is preferably a lead screw that acts on the valve. The actuator is preferred a drive shaft which extends along the system and can be actuated directly from a point outside the system.

According to a preferred embodiment of the invention, the Plant blocking means on which an axial movement of the locking means prevent when the actuator is in the first position.

According to a further preferred embodiment of the invention, the locking device has elastic means that the Secure rotatable component against movement and are pressed into a release position by the actuator and from the rotatable component come free as soon as the actuator moves into the second position.

The locking device preferably has a sleeve carried by the valve, which is connected to the valve in a rotationally fixed manner is and has Sehlüsselflächen which cooperate with the rotatable component in such a way that this against rotation is locked relative to the sleeve.

An exemplary embodiment of the invention is described below with reference to the drawing. The embodiment relates to a Motor fan system for a gas-cooled nuclear reactor. In the Drawing show:

Fig. 1 is a simplified sectional view of the device in the operating position,

FIG. 2 shows, on a larger scale, a partial section of the one shown in FIG System in a working position in which the fan is ineffective and the motor fan is ready, off to be removed from the system,

Fig. 3 is a partial section of the plant shown in Fig.l in larger scale, with the system shown in the operating position.

The gas-cooled nuclear reactor shown in Fig.l has a unit 10 made of concrete, the biological shielding combined with the pressure vessel. A penetration 11 with a steel lining leads through the thickness of the wall 12 is provided. The lower end 10A of the penetration is open to the atmospheric space 13 outside the vessel 10. The greater part of the length of the penetration 11 is occupied by a schematically indicated boiler 14 and between the Boiler 14 and the end 10A is the motor fan unit. This consists of an electric motor 15 and a gas centrifugal fan 16, which is mounted above the engine. The engine 15 itself is housed in a cylindrical housing 15A, which is closed at the lower end by a removable pressure plate 17 and is connected at the upper end coaxially to the fan housing 18, the has a pressure diaphragm 18A at the lower end. The rotor 19 of the The fan is mounted on an extension of the hollow main shaft 20 of the motor and rotates in the fan housing 16. The latter has an inlet chamber 21 in which inlet guide vanes 22 are provided, which via a transmission 23 and a clutch 24 are adjustable from a drive shaft 25, which coaxial passed through the hollow main shaft 20 and with a; removable actuating device 26 is connected, which is mounted on the outside of the pressure plate 17.

That part of the penetration 11 which contains the fan is widened, in order to effect an adaptation to a fixed structure 27.

909843/1048

This structure 27 has an outflow space 2Ö, which with the Outlet openings 30 of the blower near the outlet side of the Fan rotor 19 and with an opening 31 in connection, which is after a reactor space (not shown) within the Vessel 10 is connected. The structure 27 also has an inlet chamber j52 into which the gas side of the boiler 14 extends opens and it leads to the inlet openings 33 of the fan inlet chamber 21. The enlarged section of the penetration is lined with thermal insulation 34.

In operation, the fan 16 driven by the motor 15 Reactor cooling gas under pressure through the reactor space, not shown Reactor core, which lies within the reactor space, and then circulate through the boiler 14 back to the fan.

The housing 15A, l8 are designed so that the motor-fan unit can be removed downward from the penetration 11 for the purpose of monitoring, repair, etc. The unit is normally secured in its operating position by a bayonet lock, which can consist, for example, of radial lugs 35 on the motor housing, those with upper end faces of lugs 36 of the lining 12 cooperate. The unit can be subjected to an end-face pressure by means of suitable preload means (not shown in the drawing) be exposed. Suitable seals 37 * 30 and 39 ensure one gas-tight closure. When removing the unit, it is rotated to release the bayonet lock and then pulled down, the lugs 35 passing between the lugs 36.

This system is just one of several within the reactor and, Although the gas pressure is reduced to remove the motor blower unit, it is normally done for various reasons no reduction down to atmospheric pressure. Therefore, there is still a differential pressure that exits the cooling gas into atmosphere 13 the space 32 and the outflow chamber 28 seeks to drain when the Motor-blower unit removed 1st. The fan must therefore be closed and separated from space 32 and discharge chamber 28.

10 * 8-4

must be sealed before the unit can be removed and closed for this purpose: a valve 4O is provided.

The valve 40 consists of a cylindrical sleeve 41 which is arranged coaxially over the end of the fan housing Ib and a plurality of axially extending rods 42 at the lower end carries that in longitudinal holes of a coaxial sealing ring 43 are performed. The relative positions of sleeve 41-, Sealing ring 43 and fan inlet openings 33 and fan out la ßö ffungen 30 are such that when the valve in the Open position according to Fig.1 is located, not an obstacle of the gas flow into and out of the fan is. However, the valve can be transferred into a closed position according to FIG. 2, in which the sleeve 41 the fan inlet openings 33 closes and the sealing ring 43 covers the inlet of the outflow chamber 28. When the sleeve 41 is in its Moving the closed position (Fig. 2), it pushes the sealing ring 43 over the outlet openings 30 »to close the latter and it is through the front annular surface 43A of the sealing ring produced a sealing effect. In the closed position, the front end of each rod 42 lies in a recess 60 in the fixed Casing.

Fig. 3 shows the means for actuating the valve 40. The sleeve 41 of the valve 40 is fixed to a coaxial spindle nut 44, into which a screw spindle 45 of an actuating shaft intervenes. The shaft 46 is suspended from a thrust bearing 61, which is mounted in a cross member 62 of the fixed structure 2 /. The shaft 46 is in the bearing 6l and in a bearing 4. ' rotatable, which latter is formed in a coaxial coupling sleeve 4fc is. The coupling sleeve 48 has a spline at one end 49, which aer in keyways 50 of a coaxial extension 44A Nut 44 engages and at the other end carries the coupling sleeve « a number of longitudinally extending spring fingers 51, which inwardly projecting radial chisel surfaces 52 a-uftrelsett. In the normal position of the fingers 51, the key surfaces grip

52 in keyways 53 extending longitudinally on the outer surface of the shaft 46 are provided at the lower end, so that automatically the spindle nut 44 on the shaft 46 is locked and accidental movement of the sleeve 41 is avoided.

The inlet guide vanes drive shaft 25 is normally located in the position shown in Figure 3, in which the wedges 54 of the shaft 25 in the keyways 55 of the coupling sleeve 56 intervene, the guide vanes 22 (Fig.l) over the gear 23 actuated. In order to actuate the valve 40, the drive 26 is used removed and the shaft 25 is manually via not shown Moved means upward so that the keys are disengaged from keyways 55 and a square end 57 acts instead of the shaft 25 with a correspondingly square shape in cross section designed recess in the end of the drive shaft 46 together. At the same time, a frustoconical sleeve 59 pushes the rotatable is mounted on the end of the shaft 25, the spring fingers 51 outwards, so that the key surfaces 52 are lifted out of the keyways 53 will. A rotation of the shaft 25 now causes a rotation of the shaft 46 and an opening or closing of the valve 40.

Claims

909843/1048

Claims (1)

Patent claims: 1. Plant, the rotating with an elastic or hydraulic Has fluid-working machines, e.g. blowers, fans, compressors, pumps and turbines, the machine being housed in a housing having a fluid inlet and a fluid outlet which are in communication with a first fluid-containing space or spaces with which or with which the machine is connected in operation, and wherein the machine is removably mounted in the housing and in a second space can be withdrawn, which is outside the system, and the arrangement is made such that in the operating position the inlet and the outlet are separated from the second space and closure means for the inlet and the outlet are provided to seal the first fluid-containing space from the second space when the Machine is removed from the housing, thereby marked, that the machine has adjustable guide vanes (22) and an actuator (25) between a first Position in which means (56) for adjusting the guide vanes are detected, and is movable to a second position in which means (46) are detected for locking means (4l) to take effect. 2. Plant according to claim 1, characterized in that the closure means consist of a valve (4l) which axially between an open position in which the fluid (j5) can pass through the recess (28) (32), and a closed position is movable in which the opening is covered, and that the valve with a rotatable component (46) is coupled, which is coupled to the actuator (25) in the second position of the latter, such that it 9Q9843 / 1CK8 rotates when the bäti is rotated accordingly, moving the valve axially. j5. System according to claim 2, characterized in that the rotatable component (46) has a guide spindle (45), which acts on the valve (41). 4. Plant according to claims 2 or J3, characterized in that the rotatable component (46) has engagement means (5o), with which it acts directly on the actuator (25) when it is in the second position. 5. Plant according to claims 1 to 4, characterized in that that the actuator is a drive shaft (25) which extends through the system and directly from a Point outside of the system can be actuated. 6. System according to claims 1 to 5 * characterized in that locking means (46, 51 * 52,53) are provided which prevent axial movement of the closure means (41) when the actuating member (25) is in the first position is. 7 «Plant according to claims 2 and 6, characterized in that that the locking means have elastic parts (51) which fix the rotatable member (46) against rotation and press into a release position in order to release the rotatable component by the actuating member (25), if the latter moves to the second position. 909843/1048 ö. System according to claim ¹ J ₁ characterized, that the locking device has a sleeve (4 ~} which borne by the valve (4l) and connected to it in a rotationally fixed manner is, and that the elastic member (51) on the sleeve has key surfaces (52) which with the rotatable member (46) cooperate to prevent this from rotating relative to the sleeve to be determined. 9 · Plant according to claims ' [ or c,
characterized in that the elastic means consist of at least one peder finger (51) which, against its own elasticity, is movable outwards by engaging the actuating member (25) when the actuating member is moved into its second position. 10. Plant according to one of the preceding claims, characterized in that that it consists of a motor-fan unit for a gas-cooled nuclear reactor and that the machine is a rotating one Is a gas blower which is connected to an electric motor (15), and that the housing is a fixed structure (27) of the reactor, and the inlet and outlet (j52 and 2ö) arranged in the fixed structure are, and with an inlet (33) or. one outlet (j50) of the fan when the unit is in place in the reactor. 11. Motor-blower unit according to claim 10, characterized in that that the actuator (25) extends along the motor (15) to the proximal end of the unit *, 909843/1048