CN202325709U

CN202325709U - Stop structure of angular ring of steam room of high temperature and high pressure turbine

Info

Publication number: CN202325709U
Application number: CN201120423641XU
Authority: CN
Inventors: 边金炫
Original assignee: ZHEJIANG HUAYUAN TURBINE MACHINERY CO Ltd
Current assignee: ZHEJIANG HUAYUAN TURBINE MACHINERY CO Ltd
Priority date: 2011-10-31
Filing date: 2011-10-31
Publication date: 2012-07-11
Anticipated expiration: 2021-10-31

Abstract

The utility model discloses a stop structure of an angular ring of a steam room of a high temperature and high pressure turbine. The stop structure comprises an upper cylinder valve seat, a steam room body, an angular ring and a lock nut, wherein the angular ring is arranged on the steam room body, and the root of the angular ring is provided with two radial convex lugs; and a groove which is used for accommodating the angular ring and is matched with the shape of the root of the angular ring is arranged on the steam room body, and the angular ring is in clearance fit with the lock nut, the upper cylinder valve seat and the steam room body. According to the technical scheme, the double-lug stop design is adopted, so that the angular ring can not be rotated when being impacted by steam in the circumferential direction in the steam room, and meanwhile, the stop action of the double-lug forms the damping action of up-and-down vibration of the angular ring in the steam room, so the up-and-down vibration of the angular ring is also greatly reduced, and thus the situation the relative motion between the angular ring and the steam room does not occur is ensured, the friction between the angular ring and the steam room is completely eliminated, the matching sizes of parts are ensured, and the stable operation of a unit is ensured.

Description

High temperature and High pressure Steam Turbine vaporium dihedral ring anti-rotation structure

Technical field

The utility model relates to the vaporium coupling arrangement in a kind of steam turbine upper cylinder half and the following cylinder, particularly a kind of High temperature and High pressure Steam Turbine vaporium dihedral ring anti-rotation structure.

Background technique

Like Fig. 1, shown in Figure 2; The profile of steaming chamber of steam turbine dihedral ring commonly used is circular, and for guaranteeing the correct centering between dihedral ring 2 and the upper cylinder half valve seat 1, dihedral ring 2 need leave the gap with gland nut 4; Connect so that can move with upper cylinder half valve seat 1 centering to all around; But this structure causes dihedral ring 2 high speed rotating under the impact of vapor stream in the complicated abominable steam flow environment of high temperature and high pressure steam, makes dihedral ring and vaporium body 5 produce fretting wear.When serious, the operation one-year age, body has worn and torn and has subsided more than the 10mm when maintenance, causes the dihedral ring to rock up and down, and steam leaks, and influences unit safety operation.

Summary of the invention

In order to solve the problems of the technologies described above, the purpose of the utility model provides a kind of simple in structure, obvious results and prevents the rotation of dihedral ring, shake unit, is applicable to eliminate the wearing and tearing that are in operation between the dihedral ring and vaporium body in the High temperature and High pressure Steam Turbine.

In order to reach above-mentioned purpose, the technological scheme below the utility model has adopted:

A kind of High temperature and High pressure Steam Turbine vaporium dihedral ring anti-rotation structure; Comprise upper cylinder half valve seat, vaporium body, dihedral ring and locking nut; The dihedral ring is installed on the vaporium body through locking nut; Said dihedral ring root is provided with two radial lobes, is provided with the groove that is used to hold the dihedral ring that is complementary with dihedral ring root shape above the said vaporium body, said dihedral ring and locking nut, upper cylinder half valve seat, the equal Spielpassung of vaporium body.

As preferably, described two radial lobes are oppositely arranged on the both sides of dihedral ring.

The utility model, makes when the dihedral ring is impacted by the steam circumferencial direction in vaporium owing to adopt the design of ears rotation inhibiting owing to adopt above technological scheme; Can't rotate; Owing to the stopping function of ears ring, form the damping function of dihedral ring up-down vibration in vaporium, so the up-down vibration of dihedral ring reduces greatly also simultaneously; Thereby guaranteed not produce between dihedral ring and the vaporium relative movement; Thoroughly eliminate friction each other, guaranteed the fit dimension of component, guaranteed the stable operation of unit.

Description of drawings

Fig. 1 is the prior art constructions schematic representation;

Fig. 2 is the A-A sectional view of Fig. 1;

Fig. 3 is the structural representation of the utility model;

Fig. 4 is the B-B sectional view of Fig. 3.

Embodiment

Below in conjunction with accompanying drawing the embodiment of the utility model is done a detailed explanation.

Embodiment 1:

Like Fig. 3, a kind of High temperature and High pressure Steam Turbine vaporium dihedral ring anti-rotation structure shown in Figure 4; Comprise upper cylinder half valve seat 1, vaporium body 5, dihedral ring 2 and locking nut 4; Dihedral ring 2 is installed on the vaporium body 5 through locking nut 4; Locking nut 4 is threaded with vaporium body 5 and passes through check pin 3 positioning and lockings; Said dihedral ring 2 roots are relatively set with two radial lobes 21, are provided with the groove that is used to hold dihedral ring 2 that is complementary with dihedral ring 2 root shapes above the said vaporium body 5, said dihedral ring 2 and locking nut 4, upper cylinder half valve seat 1, vaporium body 5 equal Spielpassung.

Dihedral ring 2 is after assembling on the vaporium body 5; The dihedral ring is according to parameters such as the pressure of concrete unit model, temperature; The dihedral ring need can leave the gap of moving to all around on the vaporium body, so that when steam turbine upper cylinder cover cylinder, the dihedral ring can be adjusted with the upper cylinder half centre automatically; Dihedral ring 2 and gland nut 4 when processing and assembling, need leave suitable gap, with guarantee the dihedral ring can to around move freely adjustment and centre, the while gap can not be too big, prevents the vibration of dihedral ring.

Pay special attention to, because dihedral ring and vaporium are in the inside of steam turbine, work under the state of high temperature and high pressure steam; Operating conditions is very abominable, therefore, and selecting for use of material; The gap the aspect such as confirm; All need consider the thermal expansion factor, and take into full account the influence of the factors such as machining accuracy between vaporium and the upper cylinder half valve seat, rationally select each item fit dimension for use.

Claims

1. High temperature and High pressure Steam Turbine vaporium dihedral ring anti-rotation structure; Comprise upper cylinder half valve seat (1), vaporium body (5), dihedral ring (2) and locking nut (4); Dihedral ring (2) is installed on the vaporium body (5) through locking nut (4); It is characterized in that; Said dihedral ring (2) root is provided with two radial lobes (21), is provided with the groove that is used to hold dihedral ring (2) that is complementary with dihedral ring (2) root shape above the said vaporium body (5), said dihedral ring (2) and locking nut (4), upper cylinder half valve seat (1), the equal Spielpassung of vaporium body (5).

2. a kind of High temperature and High pressure Steam Turbine vaporium dihedral ring anti-rotation structure according to claim 1 is characterized in that described two radial lobes (21) are oppositely arranged on the both sides of dihedral ring (2).