SU1451488A1 - Regulated vaneless guide case - Google Patents

Abstract

Invention m. used in centripetal mashines, namely, in small-sized steps of cryogenic turboexpanders. The purpose of the invention is to increase the reliability and expand the range of adjustment of the apparatus, B of housing 1 is made like

Description

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The water formed by the curvilinear walls of the nozzle 2 and the cochlea 3, the device with | holds a device for controlling the gas flow rate by changing the flow area of the nozzle throat 1f 1nematically connected to the drive mechanism 12, the device is designed as a nozzle 7, one of the walls which is installed with the possibility of contacting with the guide 6 installed in the housing 1. The end face of the latter is made in the form of a curvilinear nor vrhnost forming the nozzle profile

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2, On the wall of the nozzle facing the end of the wall of the cochlea, an open groove is made. The ends of the groove form stops, one of the stops is provided with a cryotrock section which repeats the profile of the cochlea. The end wall of the cochlea 13 is provided with an l-if sealing element and hermetically installed the nozzle 7 through the groove through it. The design of the device allows to eliminate gas leaks through the regulator into the cochlea and to provide an unstressed exit from the nozzle, 2, 3 or less.

one

1 The invention relates to turbo-machinery, namely to centripetal turbomachines, and can be used in small-sized steps of cryogenic turboexpanders,

 The business of the invention is the reliability and expansion of the control range.

Fig. 1 shows a circular projection of a no-blade guide antiframe having, for example, four K | anal, in one of which there is a regulating device with a running shaft as a movement mechanism; FIG. 2 is a section A-A in FIG. 1; HJa figs, 3 - section bb of figs, 1,

In the proposed apparatus channel,. Executed in the housing 1, consists of a fuse 2 having a rectangular cross section, the cochlea 3 and the annular slit 4. A guide 6 is attached to the cheek 5 of the housing 1. A nozzle 7 contacts with the curvilinear surface 8 forming n | The nozzle profile 2, In the nozzle 7, an open groove is made, the ends of which form a yug. Seals 9 and 10, and the wall is a sealing surface 11, Nozzles 7 is kinematically connected to the drive mechanism 12, and the end of the wall 13 of the cochlea is equipped with a sealing lip. - tOCh4, which is in contact with the sealing surface i1 of the groove wall. The stop 9 of the nozzle 7 is provided with a curviline section 15, the profile of which repeats the profile of the wall of the cochlea 3. The movement of the nozzle 7 is straight.

provided by the guide 6, the end wall 13 and the cheeks 16 and 5. The device Nozzle 2 and the cochlea 3 have a constant width b, a greater width b of the annular gap 4 formed by the end of the shelf 17 and the cheek 16, the drive mechanism. 12 includes a screw 18, a nut 19, an actuator 20,

The device works as follows:

; When adjusting the flow rate of the nozzles 7 by means of a screw pair consisting of a screw 18, a nut 19, rotated by the actuator 20, moves along the guide 6 to a new position, as a result of which the height p of the nozzle tip 2, Max and mini - The small values of the height of the throat of a la carte are determined by the height of the groove between the stops 9 and 10. Gas flows through the regulator into the cochlea are eliminated by the sealing element 14,

With the width b of the nozzle 2 and the cochlea 3 and the width b of the nasad 7, the gaps between the apparatus 16, and 5 of the apparatus and the movable nozzle 7 are minimally acceptable due to the free movement of the attachment 7,

 Providing a shock-free exit of the flow from the nozzle 2 with a movable nozzle -7, the cochlea on the initial section has a special profile, the lower stop is provided with a curvilinear section 15, the profile of which repeats the curvilinear profile of the cochlea.

Claims (1)

Invention Formula An adjustable no-blade guide apparatus, comprising a housing with a channel B filled in with it, formed by the curved walls of the nozzle and cochlea, and a device for controlling gas flow by measuring the nozzle throat, kinematically connected to the drive mechanism, characterized in that increase the reliability and expansion of the control range, the device for flow control is made in the form of a nozzle, odX-A 18 Editor E. Kopcha Shm.g Composer A, Kolomeytsev and Tehred M1Hodanich on the walls of which is installed with the possibility of contact with a guide rail additionally installed in the housing, the end of the last wave c. the curved surface forming the nozzle profile, and on the wall of the nozzle facing the end of the wall of the cochlea, open ends of which form open stops, one of which is provided with a curvilinear section with a profile that repeats the profile of the cochlea, and the end of the wall of the cochlea is provided with a sealing element and hermetically through the latter is installed in the groove nozzle. 6-6 sixteen % Tszig.z Proofreader V. But ha