CN106761949A - The configuration structure and its assembly method of a kind of hollow blade cooling medium restricting orifice - Google Patents

Abstract

The present invention discloses a kind of configuration structure of hollow blade cooling medium restricting orifice, the hollow blade is by its blade root in the race of impeller, the race has cooling medium input channel, the cooling medium entrance of the hollow blade is located at blade root bottom surface, cooling medium input channel with race is corresponding, restricting orifice is provided with the cooling medium entrance of hollow blade, for limiting cooling medium consumption；The orifice plate configures the joint portion in blade root and race using assembling mode, and uses locking key by orifice plate limitation locking.

Description

The configuration structure and its assembly method of a kind of hollow blade cooling medium restricting orifice

Technical field

Invention is related to high-temperature turbine（Turbine）Hollow blade, and in particular to the hollow blade cooling medium restricting orifice is matched somebody with somebody Put structure and its assembly method.

Background technology

Hollow blade is the core component of ground gas turbine and aero-engine, because operating temperature is very high, to be passed through Cooling medium is cooled down, and coolant guiding channel is provided with rotor main shaft and impeller, and blade abdominal cavity is led to through blade root, blade Cooling medium inlet is located on blade root bottom surface, and the import is furnished with restricting orifice, and cooling medium is limited by the flow area of orifice plate Flow, makes the operating temperature stabilization of blade in design load.

In the past, the configuration structure of the orifice plate was that orifice plate is directly welded on blade root bottom surface, the structure exist problem be, It is determined that during hollow blade cooling medium consumption, theoretical calculation can only obtain coarse value, also need to simulate blade operating mode, by experiment Means could obtain the exact value of cooling medium consumption.That is, the flow area of orifice plate cannot be predefined, it is necessary in reality Constantly changed during testing, it usually needs repeatedly modification can just find the cooling medium stream value for meeting blade working temperature, this It is accomplished by repeatedly welding, cuts orifice plate, time-consuming, operating efficiency is very low, and easily damage orifice plate and blade, causes experiment Data precision declines, and cooling medium consumption is inaccurate.

The content of the invention

For problem above, the present invention provides configuration structure and its assembling of a kind of hollow blade cooling medium restricting orifice Method, its technical solution is：A kind of configuration structure of hollow blade cooling medium restricting orifice, the hollow blade passes through In the race of impeller, the cooling medium that the impeller has cooling medium input channel, the hollow blade enters its blade root Mouth is located at blade root bottom surface, and the cooling medium input channel with impeller is corresponding, and section is provided with the cooling medium entrance of hollow blade Discharge orifice plate, for limiting cooling medium consumption；Characterized in that, the orifice plate is configured in blade root and race using assembling mode Joint portion, and locking key is used by orifice plate limitation locking；The orifice plate has integrally-built main body and a hook, and the hook is from hole One end of plate main body is extended, upward back-shaped bending；The blade root bottom surface is provided with orifice plate main body fitting recess and locking key fitting recess, Blade root side is provided with orifice plate hook fitting recess；The orifice plate fitting recess is axial horizontal opening groove, and opening is located at the one of blade root Side, orifice plate loads in its fitting recess from the opening, consistent with the direction that blade root loads impeller race；When orifice plate main body loads its dress During with groove, orifice plate hook is also synchronous to load hook fitting recess, and orifice plate is suspended on blade root by its hook；The locking key fitting recess It is radial direction vertical opening groove, notch under, put into its fitting recess from bottom to top by locking key；After locking key is assembled in place, its left end Face is alignd with the right side of orifice plate and is contacted, and by orifice plate limitation locking, orifice plate is not scurried out from impeller race, and by orifice plate master The opening closure of body fitting recess and orifice plate hook fitting recess, seals, it is to avoid cooling medium is from the opening of orifice plate fitting recess Release.

The assembly method of above-mentioned hollow blade cooling medium restricting orifice, including step：

A, elder generation load orifice plate in its fitting recess；

B, again the blade root of blade together with the race of orifice plate impulse impeller, do not shift position onto, the installation operation for reserving locking key is empty Between；

C, locking key is put into its fitting recess；

D, continue the race together with restricting orifice, locking key in the lump impulse impeller the blade root of experiment blade, until in place.

Beneficial effects of the present invention：

Because orifice plate uses assembling structure, convenient disassembly saves test period, improves experiment work efficiency, and avoid because welding repeatedly Damage orifice plate and blade root are connect, causes it to deform, it is ensured that experimental data is accurate, true and reliable.

Brief description of the drawings

Fig. 1 is AND DEWATERING FOR ORIFICE STRUCTURE figure of the invention

Fig. 2 is leaf and root structure figure of the invention

Fig. 3 is locking key structure chart of the invention

Fig. 4 to Fig. 7 is orifice plate of the invention, locking key assembling process schematic diagram.

Specific embodiment

Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 to Fig. 7：The configuration structure of this hollow blade cooling medium restricting orifice, the sky By its blade root 2 in the race of impeller 4, the impeller 4 has cooling medium input channel, the hollow blade to lobus cardiacus piece Cooling medium entrance 2-2 be located at the bottom surface of blade root 2, the cooling medium input channel with impeller is corresponding, in hollow blade Cooling medium entrance 2-2 is provided with restricting orifice 1, for limiting cooling medium consumption.The orifice plate 1 is configured using assembling mode Blade root 2 and the joint portion of the race of impeller 4, and locking key 3 is used by the limitation locking of orifice plate 1.The orifice plate 1 has integrally-built master Body and hook 1-2, the center of orifice plate 1 have throttle orifice 1-1, the hook 1-2 to extend from the right-hand member of the main body of orifice plate 1, upwards Back-shaped bending；The bottom surface of the blade root 2 is provided with orifice plate main body fitting recess 2-1 and locking key fitting recess 2-3, is set on the right flank of blade root 2 Abacus hook fitting recess 2-4, the orifice plate main body fitting recess 2-1 are axial horizontal opening grooves, and opening is positioned at the right side of blade root 2 Side, orifice plate 1 loads in its fitting recess 2-1 from right to left, and the direction with the race that blade root 2 loads impeller 4 is consistent；When orifice plate main body When loading its fitting recess 2-1, orifice plate hook 1-1 also synchronously loads its fitting recess 2-4, and orifice plate 1 links up with 1-2 and is suspended on leaf by it On root 2；The locking key fitting recess 2-3 is located at the right part of blade root 2, and its left wall face flushes with the right side of orifice plate 1, locking key dress It is radial direction vertical opening groove with groove 2-3, notch under, put into its fitting recess 2-3 from bottom to top by locking key 3；When locking key 3 is assembled to Behind position, its left side contacts with the right side of orifice plate 1, by the limitation locking of orifice plate 1, orifice plate 1 is not altered from the race of impeller 4 Go out, and by the opening closure of orifice plate main body fitting recess 2-1 and orifice plate hook fitting recess 2-4, seal, it is to avoid cooling medium Released from the opening of orifice plate fitting recess.

The assembly method of above-mentioned hollow blade cooling medium restricting orifice, including step：

A, elder generation load orifice plate 1 in its fitting recess in 2-1,2-4, as shown in Figure 4；

B, again the blade root 2 of blade together with the race of the impulse impeller 4 from right to left of orifice plate 1, do not shift position onto, reserve locking key 3 Installation operation space, as shown in Figure 5；

C, locking key 3 is put into its fitting recess 2-3, as shown in Figure 6；

D, continue the race together with restricting orifice 1, locking key 3 in the lump impulse impeller 4 the blade root 2 of blade, until in place, such as Fig. 7 It is shown.

Demounting procedure is opposite with above-mentioned steps.

Claims (2)

1. a kind of configuration structure of hollow blade cooling medium restricting orifice, the hollow blade is by its blade root mounted in impeller In race, the cooling medium entrance that the impeller has cooling medium input channel, the hollow blade is located at blade root bottom surface, with The cooling medium input channel of impeller is corresponding, and restricting orifice is provided with the cooling medium entrance of hollow blade, cold for limiting But rate-of flow；Characterized in that, the orifice plate configures the joint portion in blade root and race using assembling mode, and use locking key By orifice plate limitation locking；The orifice plate has integrally-built main body and hook, and the hook extends from one end of orifice plate main body And go out, upward back-shaped bending；The blade root bottom surface is provided with orifice plate main body fitting recess and locking key fitting recess, and blade root side is provided with hole Plate links up with fitting recess；The orifice plate fitting recess is axial horizontal opening groove, and opening fills positioned at the side of blade root, orifice plate from the opening Enter in its fitting recess, it is consistent with the direction that blade root loads impeller race；When orifice plate main body loads its fitting recess, orifice plate hook Synchronous to load hook fitting recess, orifice plate is suspended on blade root by its hook；The locking key fitting recess is radial direction vertical opening groove, Notch under, put into its fitting recess from bottom to top by locking key；After locking key is assembled in place, the right side pair of its left side and orifice plate Neat contact, by orifice plate limitation locking, makes orifice plate not scurried out from impeller race, and orifice plate main body fitting recess and orifice plate are linked up with The opening closure of fitting recess, seals, it is to avoid cooling medium releases from the opening of orifice plate fitting recess.

2. the assembly method of hollow blade cooling medium restricting orifice described in claim 1, including step：

A, elder generation load orifice plate in its fitting recess；

B, again the blade root of blade together with the race of orifice plate impulse impeller, do not shift position onto, the installation operation for reserving locking key is empty Between；

C, locking key is put into its fitting recess；

D, continue the race together with restricting orifice, locking key in the lump impulse impeller the blade root of experiment blade, until in place.