CN105626570B - A kind of hydrogen turbine pump - Google Patents

Abstract

The invention belongs to a kind of turbine pumps, are related to a kind of hydrogen turbine pump, and in particular to a kind of Hydrauservo System energy highly reliable ultrahigh speed hydrogen turbine pump of novel long-range.The device includes housing unit, air intake assembly, shafting component, seal assembly, and air intake assembly is fixed on housing unit side；The rotation of shafting component is fixed on inside housing unit；Seal assembly is fixed on housing unit and shafting component passes through seal assembly.Turbo blade height is relatively low, greatly increases the centrifugation tensile stress of root of blade in the ultrahigh speed course of work；Exhaust recycles, and takes away by the heat exchange of liquid in low temperature hydrogen in spiral exhaust and bearing bore and in time heat, greatly improves hydrogen turbine pump and its stability and reliability using object work.

Description

A hydrogen turbo pump

technical field

The invention relates to a hydrogen turbopump, in particular to a novel long-distance, high-reliability and ultra-high-speed hydrogen turbopump for hydraulic servo system energy.

Background technique

The long-range, high-reliability and ultra-high-speed hydrogen turbo pump is the core power element in the energy source of the hydraulic servo system. Specifically, the device uses the high-pressure hydrogen drawn from the liquid rocket engine or the hydrogen drawn from the high-pressure gas cylinder to drive the turbine to rotate at a super high speed. The tangential pump impeller is coaxially driven, and the tangential pump impeller sucks the low-pressure liquid in the servo system, throws it out through high-speed centrifugal action, and then cooperates with the tangential jet port on the servo system or mechanism to convert the kinetic energy of the liquid into pressure energy. The high-pressure liquid drives the actuator to move.

Due to the long-term ultra-high-speed operation of the turbine, the temperature of the lubricating and cooling oil in the bearing chamber (that is, the working medium of the hydraulic servo system) will rise to 200°C in a short time due to the agitation of the bearing and the friction and heat generation of the mechanical dynamic seal. The above will greatly reduce the stability and reliability of the turbo pump (the life of the bearing and the life of the mechanical dynamic seal are greatly related to the working environment temperature, in addition, the working accuracy and reliability of the hydraulic servo system are also related to the temperature of the working medium) .

Contents of the invention

The technical problem to be solved by the present invention is to provide a hydrogen turbopump, specifically to provide a hydrogen turbopump with a more reliable structure and a longer working time.

In order to solve the above-mentioned technical problems, the present invention provides a hydrogen turbopump. The device includes a housing assembly, an air intake assembly, a shafting assembly capable of rotating relative to the housing assembly, and a sealing assembly. The air intake assembly is fixed on one side of the housing assembly. The shafting assembly is installed in the housing assembly, and the shafting assembly passes through the sealing assembly; a sealing assembly is set between the housing assembly and the shafting assembly; a turbine chamber is formed between the housing assembly and the air intake assembly, and the housing assembly and the Bearing cavities are formed between the shafting components.

One side of the housing assembly is provided with a helical exhaust channel communicating with the turbine cavity, the inlet of the helical exhaust channel is in communication with the turbine cavity, and the end of the helical exhaust channel outlet side of the housing assembly is provided with a The threaded hole and the oil outlet hole connected to the bearing cavity.

A graphite sealing groove is opened in the circumferential direction of the outlet of the spiral exhaust passage.

The other side of the housing component is provided with a threaded hole for installing the sealing component and a flexible graphite groove for fixing the flexible graphite.

The shafting assembly includes a shaft, on which a turbine disk, a half-ring bearing, a shaft bushing, an angular contact ball bearing, and a tangential pump impeller are sheathed in turn; the turbine disk and the double inner half-ring bearing are spaced apart, and the shaft bushing and The double inner half-ring bearings and angular contact ball bearings are all bonded, and the angular contact ball bearings are bonded to the tangential pump impeller.

The air intake assembly includes a turbine cover, an intake joint, and an intake ring. The intake ring is fixed on the turbine cover; the intake joint is fixed on the turbine cover and the intake ring.

The turbine cover is provided with a Laval nozzle on the intake ring, and the Laval nozzle is located between the turbine cover and the intake ring.

The air intake joint is composed of an intake pipe and a flange, the end of the air intake pipe is provided with a flange, and a graphite sealing groove is opened on the flange.

The sealing assembly includes a sealing shell, a static ring assembly, and a flexible graphite compression spring. .

A sealing ring is provided between the sealing housing and the stationary ring assembly.

The beneficial technical effect of the invention is that: the blade height of the turbine is relatively low, and compared with the turbine pump with the same level of output power, the height of the blade is reduced by 25%. The reduction of the blade height greatly increases the centrifugal tensile stress at the root of the blade during ultra-high speed (85000rpm) operation, and the centrifugal tensile stress is increased by 25%, making the structure of the turbine blade more reliable during the working process and can adapt to longer working hours; For gas reuse, the turbo pumps in the past structure directly evacuate the gas after work. The hydrogen turbo pump in this structure drives the high-speed and low-temperature hydrogen after the work of the turbine through the spiral exhaust channel on the turbine shell. After emptying, the spiral exhaust channel is wound around the outer edge of the bearing cavity of the turbo pump shaft; through the heat exchange between the low-temperature hydrogen in the spiral exhaust channel and the liquid in the bearing cavity, the heat is taken away in time, so that the hydrogen turbo pump can run for a long time. During the working time (above 600s), the temperature of the working medium in the bearing cavity will not exceed 70°C (part of the working medium in the hydraulic servo system will circulate through the bearing cavity of the hydrogen turbo pump, so the temperature in the bearing cavity is also the temperature of the working medium), Therefore, the working stability and reliability of the hydrogen turbopump and its target hydraulic servo system are greatly improved.

Description of drawings

Fig. 1 is the structural representation of a kind of hydrogen turbopump provided by the present invention;

Fig. 2 is a schematic structural view of the air intake assembly provided by the present invention;

Fig. 3 is the front view of the turbine cover provided by the present invention;

Fig. 4 is the rear view of the turbine cover provided by the present invention;

5 is a schematic structural view of the air inlet joint provided by the present invention;

Fig. 6 is a schematic structural view of the intake ring provided by the present invention;

Fig. 7 is a left view of the intake ring provided by the present invention;

Fig. 8 is a structural schematic diagram of a turbo pump shaft assembly provided by the present invention;

Fig. 9 is a schematic structural view of the integrated turbine rotor provided by the present invention;

Fig. 10 is a left view of the integrated turbine rotor provided by the present invention;

Fig. 11 is a schematic structural view of the moving ring provided by the present invention;

Figure 12 is a schematic structural view of the bushing provided by the present invention;

Fig. 13 is a schematic structural view of the tangential pump impeller provided by the present invention;

Figure 14 is a schematic structural view of the sealing assembly provided by the present invention;

Fig. 15 is a schematic structural view of the sealed housing provided by the present invention;

Fig. 16 is a schematic structural view of the static ring assembly provided by the present invention;

Fig. 17 is a schematic structural view of the guide screw provided by the present invention;

Figure 18 is a schematic structural view of the compression spring provided by the present invention;

Fig. 19 is a schematic structural view of the housing assembly of the hydrogen turbo pump provided by the present invention;

Fig. 20 is a right view of the housing of the hydrogen turbo pump provided by the present invention;

Fig. 21 is a left side view of the casing of the hydrogen turbo pump provided by the present invention;

Fig. 22 is a schematic structural view of the restrictor nozzle provided by the present invention;

Figure 23 is a schematic structural view of the Laval nozzle provided by the present invention

Fig. 24 is a schematic diagram of the structure of the adapter pump head and the tangential injection port provided by the present invention.

In the figure: 1 is the shell assembly, 2 is the intake assembly, 3 is the sealing assembly, 4 is the turbine disk, 5 is the copper gasket, 6 is the first plug, 7 is the graphite sealing ring, 8 is the connecting bolt, 9 is the Flexible graphite sealing ring, 10 is the moving ring, 11 is the sealing ring, 12 is the retaining ring, 13 is the double inner half ring bearing, 14 is the shaft assembly, 15 is the copper pad, 16 is the shaft bushing, 17 is the angular contact ball Bearing, 18 is the shaft, 19 is the elastic element, 20 is the first adjusting gasket, 21 is the tangential pump impeller, 22 is the second adjusting gasket, 23 is the locking screw, 24 is the stud, 25 is the turbine cover , 26 is a Laval nozzle, 27 is an air intake joint, 28 is an air intake connection, 29 is a graphite sealing ring groove, 30 is a flange, 31 is an air intake ring, 33 is a sealing shell, 35 is a static ring assembly, 39 is flexible graphite, 40 is a guide screw, 41 is a compression spring, 42 is an inlet of a spiral exhaust channel, 43 is a spiral exhaust channel, 44 is an outlet of a spiral exhaust channel, 45 is a threaded hole, and 46 is an oil discharge hole. 47 is a screw hole, 48 is a flexible graphite groove, 49 is a bolt hole, 50 is a bolt hole, 51 is a graphite sealing groove, 52 is a restrictor nozzle, 53 is an adapter pump head, 54 is a second plug, 55 is a thread Holes, 56 are tangential injection ports, 57 are turbine chambers, and 58 are bearing chambers.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

As shown in FIG. 1 , a hydrogen turbopump according to the present invention includes a housing assembly 1 , an intake assembly 2 , a shafting assembly 14 , and a sealing assembly 3 . The intake assembly 2 is fixed on one side of the housing assembly 1; the shafting assembly 14 is installed inside the housing assembly 1; the sealing assembly 3 is installed between the housing assembly 1 and the shafting assembly 14 to realize the turbine chamber of the housing assembly 1 57 and the seal of the bearing chamber 58.

As shown in FIGS. 1 , 2 , 3 , 4 , 5 , 6 , 7 , and 23 , the intake assembly 2 includes a turbine cover 25 , an intake joint 27 , and an intake ring 31 . There are two Laval nozzles 26 on the turbine cover 25 . The intake ring 31 is a cut-away semi-cylindrical tube. The intake ring 31 is welded on the outer sidewall of the turbine cover 25, and the intake ring 31 wraps the position of the Laval nozzle 26. One end of the intake ring 31 is sealed, and the intake ring The other end of 31 is welded with an end of air inlet joint 27. The intake joint 27 is composed of an integrally processed intake pipe 28 and a flange 30. The end of the intake pipe 28 is provided with a flange 30, and the flange 30 is provided with a graphite sealing groove 29 along the circumference. The graphite sealing groove 29 is used for Sealed connection to high pressure air source. The turbine cover 25 of the air intake assembly 2 is fixedly connected to the side wall of the housing assembly 1 through connecting bolts 8 and studs 24, and the joint between the air intake assembly 2 and the housing assembly 1 is passed through a flexible graphite sealing ring 9 seal. The center of the air intake assembly 2 is provided with a cylindrical tube extending outward, and one end of the shaft of the shafting assembly 14 is inserted into the inner side of the cylindrical tube. The air intake components 2 are connected by threads, and the plug 6 and the air intake components 2 are sealed by a copper gasket 5 .

As shown in Figures 8, 9, 10, 11, 12, and 13, the shafting assembly 14 includes a shaft 18, a turbine disc 4, a moving ring 10, an o-shaped sealing ring 11, a double inner half-ring bearing 13, a shaft bushing 16, Angular contact ball bearing 17, tangential pump impeller 21, adjusting gasket 20. One end of the shaft 18 is covered with a turbine disk 4, and the two are unified as a whole, which is an integral turbine rotor. A moving ring 10 is sheathed on the shaft 18 adjacent to the turbine disc 4 . Double inner half-ring bearings 13 are sheathed on the position adjacent to the moving ring 10 on the shaft 18 . A shaft bushing 16 is overlaid on the shaft 18 adjacent to the double inner half-ring bearing 13 . Angular contact ball bearings 17 are sheathed on the shaft 18 adjacent to the shaft bushing 16 . A tangential pump impeller 21 is sheathed on the shaft 18 adjacent to the angular contact ball bearing 17, and the tangential pump impeller 21 and the shaft 18 are fixedly connected by threads. The moving ring 10 , o-ring seal 11 , double inner half-ring bearing 13 , shaft bushing 16 and angular contact ball bearing 17 on the shaft assembly 14 are fastened on the shaft 18 by applying tightening torque to the tangential pump impeller 21 .

The blade height of the turbine disk 4 is 8-12mm, between the angular contact ball bearing 17 and the tangential pump impeller 21, between the moving ring 10 and the double inner half-ring bearing 13, there are respectively first adjusting gaskets 20, and the shaft bushing 16 It is a transition fit with the shaft 18. During the operation of the shafting assembly 14, the compression amount between the moving ring 10 and the static ring assembly 35 is adjusted by adjusting the first adjusting gasket 20 between the moving ring 10 and the double inner half-ring bearing 13; by adjusting the angular contact The first adjusting gasket 20 between the ball bearing 17 and the tangential pump impeller 21 further adjusts the gap between the tangential pump impeller 21 and the casing assembly 1 . The shaft assembly 14 is supported by double inner half-ring bearings 13 and angular contact ball bearings 17 , and is installed in the housing assembly 1 . The shafting assembly 14 exerts an axial preload on the outer ring of the angular contact ball bearing 17 through the elastic element 19, and the outer ring of the double inner half-ring bearing 13 is limited by adjusting the stop ring 12, and the adjustment stop ring 12 and the housing assembly 1 For transitional fit, the adjustment stop ring 12 is limited by the sealing assembly 3 , and the sealing assembly 3 is fixed to the housing assembly 1 by locking screws 23 . In the middle of the double inner half-ring bearing 13 and the angular contact ball bearing 17 is a bearing chamber 58. There is a hole on the housing assembly 1 at the bottom of the bearing chamber 58 to install the speed sensor when necessary. When the speed does not need to be measured, the hole passes through the second The plug 54 and the copper pad 15 are sealed, and the second plug 54 is fixedly connected to the housing assembly 1 by threads.

As shown in FIGS. 14 , 15 , 16 , 17 , and 18 , the seal assembly 3 separates the lubricating fluid in the bearing cavity 58 from the gas in the turbine cavity 57 . The seal assembly 3 includes a seal housing 33 , a static ring assembly 35 , flexible graphite 39 , a compression spring 41 and an O-ring seal 11 . A static ring assembly 35 is nested in the sealed casing 33 , and a flexible graphite 39 is nested in the static ring assembly 35 , and a compression spring 41 is nested between the static ring assembly 35 and the sealing casing 33 . The static ring assembly 35 provides a compressive force through the compression spring 41 placed in the sealing housing 33, and the guide screw 40 realizes that the static ring assembly 35 and the sealing housing 33 can only move in the axial direction and cannot move in a circle . The sealing ring groove for installing the O-ring seal 11 is provided at the inner circumferential direction of the sealing housing 33 where it contacts the static ring assembly 35, for installing the O-ring sealing ring 11, and the outer circumferential direction of the sealing housing 33 is provided with a groove for installing the O-ring sealing ring 11. Form sealing ring 11 sealing ring grooves.

As shown in Figures 19, 20, 21, and 22, there is a coaxial cylindrical hole in the middle of the housing assembly 1, which is the location for the shafting assembly 14; the right side is the turbine chamber 57, which is the working location of the turbine disk 4. One side of the housing assembly 1 is provided with a helical exhaust channel 43, the helical exhaust channel inlet 42 of the helical exhaust channel 43 communicates with the turbine chamber 57, and the helical exhaust channel outlet 42 is opposite to the helical exhaust channel. The entrance 44 of the channel turns 180° spirally, the outlet 44 of the spiral exhaust channel is connected with the connecting port of the servo mechanism or the transfer pump head 53, and the outlet 44 of the spiral exhaust channel is provided with a graphite sealing groove 51 in the circumferential direction. A threaded hole 45 and an oil outlet hole 46 are provided at the end of the shell assembly 1 adjacent to the spiral exhaust passage 43, and a restrictor nozzle 52 is installed in the threaded hole 45, and the through hole in the center of the restrictor nozzle 52 passes through the round hole and the bearing The cavity 58 is connected, and the low-pressure oil enters the bearing cavity 58 through the through hole in the center of the restrictor nozzle 52 to realize the lubrication and cooling of the bearing cavity 58 ; the low-pressure oil is discharged from the bearing cavity 58 through the oil discharge hole 46 . The other side of the housing assembly 1 is provided with a threaded hole 47 for installing the sealing assembly 3 and a flexible graphite groove 48 for fixing the flexible graphite 39 . The housing assembly 1 realizes the connection between the housing assembly 1 and the intake assembly 2 through the bolt hole 50 and the connecting bolt 8, and realizes the connection between the hydrogen turbo pump and the threaded hole 55 of the transfer pump head 53 of the servo mechanism through the bolt hole 49 The connection with the mechanical dynamic seal assembly 3 is realized through the screw hole 47 , and the installation of the sealing graphite 39 between the mechanical dynamic seal and the housing assembly 1 is realized through the flexible graphite groove 48 .

The working process of a hydrogen turbopump provided by the present invention: the intake connection pipe 28 of the intake assembly 2 communicates with the high-pressure gas source through a pipeline, the flange 30 and the graphite sealing groove 29 on the intake connection pipe 28 of the intake assembly 2 Realize the connection and sealing of high-pressure air source. The high-pressure hydrogen enters the Laval nozzle 26 through the intake pipe 28 and the intake ring 31 of the intake assembly 2, expands and accelerates, impacts on the blades of the turbine disc in the turbine disc 4, and drives the turbine disc 4 to rotate at a high speed. The low-temperature hydrogen after doing work spirally flows around the part of the shafting assembly 14 installed in the housing assembly 1 through the spiral exhaust passage 43 on the housing assembly 1 and takes away heat. A 180° turn has taken place at the inlet 42 of the exhaust channel, that is, the helical exhaust channel 43 flows around the helical flow of the shafting assembly 14 installed in the housing assembly 1 and takes away heat, improving the working environment temperature of the shafting assembly 14. The outlet 44 of the spiral exhaust channel is connected with the threaded hole of the pump head 53 of the servo mechanism, and is sealed externally by placing a flexible graphite sealing ring 7 in the graphite sealing groove 51 around the outlet 44 of the spiral exhaust channel. The hydrogen gas discharged from the outlet 44 of the spiral exhaust channel drives the tangential pump impeller 21 coaxially through the turbine disk 4, and the tangential pump impeller 21 will output the low-pressure oil in the cavity of the transfer pump head 53 to the The actuator of the servomechanism; when pressurized, the pressure of 45 connected to the transfer pump head 53 increases, and the low-pressure oil flows into the bearing cavity, and flows to other pipelines through 46.

Claims (9)

1. A hydrogen turbopump, characterized in that: the device comprises a housing assembly (1), an intake assembly (2), a shafting assembly (14) capable of rotating relative to the housing assembly (1), a sealing assembly (3 ), the intake assembly (2) is fixed on one side of the housing assembly (1), the shafting assembly (14) is installed in the housing assembly (1), and the shafting assembly (14) passes through the sealing assembly (3); A sealing assembly (3) is sleeved between the body assembly (1) and the shafting assembly (14); a turbine cavity (57) is formed between the casing assembly (1) and the intake assembly (2), and the casing assembly (1) A bearing cavity (58) is formed between the shaft assembly (14); One side of the housing assembly (1) is provided with a helical exhaust channel (43) communicating with the turbine chamber (57), the inlet of the helical exhaust channel (43) communicates with the turbine chamber (57), and the housing A threaded hole (45) and an oil outlet hole (46) communicating with the bearing chamber (58) are opened at the end of the outlet side of the spiral exhaust passage (43) of the assembly (1). 2. A hydrogen turbopump according to claim 1, characterized in that: a graphite sealing groove (51) is opened circumferentially at the outlet of the spiral exhaust passage (43). 3. A hydrogen turbopump according to claim 2, characterized in that: the other side of the housing assembly (1) is provided with a threaded hole (47) for installing the sealing assembly (3) and a fixed flexible Flexible graphite groove (48) for graphite (39). 4. A hydrogen turbopump according to any one of claims 1 to 3, characterized in that: the shaft assembly (14) includes a shaft (18), and the shaft (18) is sequentially covered with turbine discs ( 4), half-ring bearing (13), shaft bushing (16), angular contact ball bearing (17), tangential pump impeller (21); the interval between the turbine disk (4) and the double inner half-ring bearing (13) is set , all fit between the shaft bushing (16) and the double inner half-ring bearing (13) and the angular contact ball bearing (17), and fit between the angular contact ball bearing (17) and the tangential pump impeller (21). 5. A hydrogen turbopump according to claim 4, characterized in that: the intake assembly (2) comprises a turbine cover (25), an intake joint (27), an intake ring (31), and the intake The ring (31) is fixed on the turbine cover (25); the intake joint (27) is fixed on the turbine cover (25) and the intake ring (31). 6. A kind of hydrogen turbopump according to claim 5, characterized in that: the turbine cover (25) is provided with a Laval nozzle (26) on the intake ring (31), and the Laval nozzle (26 ) between the turbine cover (25) and the intake ring (31). 7. A hydrogen turbopump according to claim 6, characterized in that: the air intake joint (27) is composed of an intake joint (28) and a flange (30), and the end of the intake joint (28) The part is provided with a flange (30), and a graphite sealing groove (29) is arranged on the flange (30). 8. A hydrogen turbopump according to claim 7, characterized in that: the seal assembly (3) includes a seal housing (33), a stationary ring assembly (35), a flexible graphite (39) compression spring (41 ) the sealing shell (33) is nested with a static ring assembly (35), the static ring assembly (35) is nested with flexible graphite (39), and the static ring assembly (35) and the sealing shell (33) are nested There is compression spring (41). 9. A hydrogen turbopump according to claim 8, characterized in that: a sealing ring (11) is provided between the sealing housing (33) and the static ring assembly (35).