CN204419278U

CN204419278U - Nozzle ring

Info

Publication number: CN204419278U
Application number: CN201420831817.9U
Authority: CN
Inventors: 程国华
Original assignee: Ningguo City Hua Chengjin Grinds Science And Technology Ltd
Current assignee: Ningguo City Hua Chengjin Grinds Science And Technology Ltd
Priority date: 2014-12-23
Filing date: 2014-12-23
Publication date: 2015-06-24
Anticipated expiration: 2024-12-23

Abstract

The utility model discloses kind of a nozzle ring, comprise inner ring, outer ring and some guide vanes, the inner peripheral surface of described outer ring offers some mounting holes, described mounting hole is uniform around the axis of outer ring, one end of described guide vane is fixedly connected on the outer peripheral surface of inner ring, the other end of guide vane inserts in mounting hole, and the quantity of described guide vane is identical with the quantity of mounting hole.The utility model nozzle ring can avoid guide vane to occur that stress is concentrated, and improves the working life of nozzle ring.

Description

Nozzle ring

Technical field

The utility model relates to gas turbine field, particularly relates to a kind of nozzle ring.

Background technique

Nozzle ring, for changing the flow direction of gas, promotes blade rotation.Work under bad environment residing for nozzle ring, it should bear high-temperature fuel gas stream and each part and to be heated the larger thermal stress that inequality causes, and bears combustion gas again by the aerodynamic force that produces during guide vane and the oscillating load caused by gas.The two ends of the guide vane of existing nozzle ring are all fixedly connected on its outer ring and inner ring, thus limit the thermal distortion of turbine nozzle vane, cause directing vane sector-meeting to produce larger stress and concentrate, affect the working life of nozzle ring.

Model utility content

The utility model object is to provide a kind of nozzle ring, and guide vane can be avoided to occur that stress is concentrated, and improves the working life of nozzle ring.

The utility model technical solution problem adopts following technological scheme: a kind of nozzle ring, comprise inner ring, outer ring and some guide vanes, the inner peripheral surface of described outer ring offers some mounting holes, described mounting hole is uniform around the axis of outer ring, one end of described guide vane is fixedly connected on the outer peripheral surface of inner ring, the other end of guide vane inserts in mounting hole, and the quantity of described guide vane is identical with the quantity of mounting hole.

Optionally, the shape of described mounting hole is identical with the shape of guide vane outer end.

Optionally, between at the bottom of the exterior edge face of described guide vane and the hole of mounting hole, there is gap.

Optionally, the inner of described guide vane is welded on the outer peripheral surface of inner ring.

Optionally, the quantity of described guide vane is 17.

Optionally, the outer peripheral surface of described outer ring is provided with annular flange flange, described annular flange flange is coaxial with outer ring, and the inner ring of annular flange flange is fixedly connected on the bottom of the outer peripheral surface of outer ring.

Optionally, described outer ring and annular flange flange are structure as a whole.

Optionally, the inner peripheral surface of described inner ring is provided with inner ring, described inner ring and inner ring are coaxially arranged, and inner ring is fixedly connected on the inner peripheral surface of inner ring.

Optionally, described inner ring and inner ring are structure as a whole.

Optionally, described guide vane adopts hollow-core construction, wall thickness is 1.0mm, the air film hole of three row Φ 0.4mm is had in the blade leading edge of guide vane, the air film hole of a row Φ 0.7mm is had at the leaf basin trailing edge place of guide vane, described outer ring is provided with through hole, described inner ring has the exhaust port of diameter of phi 2mm, described ventilating hole and exhaust port all with the inner space of guide vane.

The utility model has following beneficial effect: this guider by offering mounting hole on the inner peripheral surface of its outer ring, one end of guide vane is fixedly connected on the outer peripheral surface of inner ring, the other end of guide vane inserts in mounting hole, because guide vane has free end, stress can not be produced when its temperature distortion to concentrate, thus can improve the working life of nozzle ring.

Accompanying drawing explanation

Fig. 1 is the stereogram of the utility model nozzle ring;

Fig. 2 is the plan view of the utility model nozzle ring;

Fig. 3 is the stereogram of the outer ring of the utility model nozzle ring;

Fig. 4 is the plan view of the outer ring of the utility model nozzle ring;

Fig. 5 is the sectional view along A-A direction in Fig. 4;

Fig. 6 is the stereogram (guide vane is provided with air film hole) of the utility model nozzle ring;

In figure, mark is illustrated as: 10-inner ring; 11-inner ring; 20-outer ring; 21-mounting hole; 22-annular flange flange; 30-guide vane.

Embodiment

Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is further elaborated.

Embodiment 1

Present embodiments provide a kind of nozzle ring, as shown in Figure 1 and Figure 2, comprise inner ring 10, outer ring 20 and some guide vanes 30.Inner ring 10 and outer ring 20 are all in ring, and guide vane 30 is arranged between inner ring 10 and outer ring 20.Shown in composition graphs 3, Fig. 4, Fig. 5, the inner peripheral surface of outer ring 20 offers some mounting holes 21, and mounting hole 21 is uniform around the axis of outer ring 20, and the shape of mounting hole 21 is identical with the shape of guide vane 30 outer end.One end of guide vane 30 is fixedly connected on the outer peripheral surface of inner ring 10, and the other end of guide vane 30 inserts in mounting hole 21, and the quantity of guide vane 30 is identical with the quantity of mounting hole 21.In the present embodiment, the inner of guide vane 30 is welded on the outer peripheral surface of inner ring 10.

Be Spielpassung between the outer end of mounting hole 21 and guide vane 30, with adapt to guide vane 30 be heated after distortion, between at the bottom of the exterior edge face of guide vane 30 and the hole of mounting hole 21, there is gap.

In the present embodiment, connecting rod can also be set in outer ring and the lower end of inner ring and be connected outer ring and inner ring, ensure the relatively stable of outer ring and inner ring.

In the present embodiment, the quantity of guide vane 30 is 17.

As shown in Figure 1, the outer peripheral surface of outer ring 20 is provided with annular flange flange 22, annular flange flange 22 is coaxial with outer ring 20, and the inner ring of annular flange flange 22 is fixedly connected on the bottom of the outer peripheral surface of outer ring 20.Outer ring 20 and annular flange flange 22 are structure as a whole.The inner peripheral surface of inner ring 10 is provided with inner ring 11, and inner ring 11 and inner ring 10 are coaxially arranged, and inner ring 11 is fixedly connected on the inner peripheral surface of inner ring 10.Inner ring 10 and inner ring 11 are structure as a whole.

In the present embodiment, guide vane 30 is compound lean blade, also i.e. twisted blade, and the blade face shape of blade is curved surface and non-planar surface, not only blade profile profile is inclined not only but also tiltedly, can reduce blade root Effects of Secondary Flow, improves blade root reaction degree, reduce the aerodynamic loss at blade root and blade tip place, improve pneumatic efficiency.

As shown in Figure 6, in present embodiment, the blade profile of guide vane 30 adopts hollow-core construction, and wall thickness is 1.0mm, has the air film hole of three row Φ 0.4mm in blade leading edge, has the air film hole of a row Φ 0.7mm at leaf basin trailing edge place.Outer ring 20 is provided with vent simultaneously, inner ring 10 has the exhaust port of diameter of phi 2mm.Vent and exhaust port all with the inner space of guide vane 30.

Cooled gas enters blade profile inner chamber from the vent of outer ring 20 through mounting hole; its portion gas is flowed out by air film hole and forms air film protective layer at blade; remaining gas flows out from Φ 2mm hole while the cooling of high-pressure turbine blisk ante-chamber; increase the heat exchange of stator blade 2 internal convection; the inner each position of stator blade is heated evenly; therefore can improve the harmony of its thermal distortion further, reduce the damage due to parts such as inharmonious the caused stator blades of thermal distortion.

Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technological scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment's technological scheme of the utility model.

Claims

1. a nozzle ring, comprise inner ring (10), outer ring (20) and some guide vanes (30), it is characterized in that, the inner peripheral surface of described outer ring (20) offers some mounting holes (21), described mounting hole (21) is uniform around the axis of outer ring (20), one end of described guide vane (30) is fixedly connected on the outer peripheral surface of inner ring (10), the other end of guide vane (30) inserts in mounting hole (21), and the quantity of described guide vane (30) is identical with the quantity of mounting hole (21).

2. nozzle ring according to claim 1, is characterized in that, the shape of described mounting hole (21) is identical with the shape of guide vane (30) outer end.

3. nozzle ring according to claim 2, is characterized in that, has gap between at the bottom of the exterior edge face of described guide vane (30) and the hole of mounting hole (21).

4. the nozzle ring according to claim 1 or 2 or 3, is characterized in that, the inner of described guide vane (30) is welded on the outer peripheral surface of inner ring (10).

5. nozzle ring according to claim 4, is characterized in that, the quantity of described guide vane (30) is 17.

6. nozzle ring according to claim 5, it is characterized in that, the outer peripheral surface of described outer ring (20) is provided with annular flange flange (22), described annular flange flange (22) is coaxial with outer ring (20), and the inner ring of annular flange flange (22) is fixedly connected on the bottom of the outer peripheral surface of outer ring (20).

7. nozzle ring according to claim 6, is characterized in that, described outer ring (20) and annular flange flange (22) are structure as a whole.

8. nozzle ring according to claim 7, it is characterized in that, the inner peripheral surface of described inner ring (10) is provided with inner ring (11), described inner ring (11) and inner ring (10) are coaxially arranged, and inner ring (11) is fixedly connected on the inner peripheral surface of inner ring (10).

9. nozzle ring according to claim 8, is characterized in that, described inner ring (10) and inner ring (11) are structure as a whole.

10. nozzle ring according to claim 1, it is characterized in that, described guide vane (30) adopts hollow-core construction, wall thickness is 1.0mm, the air film hole of three row Φ 0.4mm is had in the blade leading edge of guide vane (30), the air film hole of a row Φ 0.7mm is had at the leaf basin trailing edge place of guide vane (30), described outer ring (20) is provided with vent, described inner ring (10) has the exhaust port of diameter of phi 2mm, described ventilating hole and exhaust port all with the inner space of guide vane (30).