Sinking amount measuring device of air pre-heater rotor under thermal state working condition

Abstract

The utility model discloses a sinkage measuring device of an air pre-heater rotor under a thermal state working condition. The air pre-heater rotor can have mushroom deformation under the hot state condition, the rotor outer ring sinks, and corresponding deformation gaps can be reserved for radial sealing of the cold end and the hot end of the air pre-heater, so that the sealing effect after deformation is guaranteed. The radial and annular sealing gaps of the cold and hot ends are designed values given by theoretical calculation and are larger than actual values. The device comprises an adjusting bracket welded at the cold end of the air pre-heater, wherein a measuring block is fixed on the adjusting bracket through a bolt; the adjusting support comprises a fixing plate, and the fixing plate is connected with the adjusting plate through a bolt. The measuring block is an aluminum rectangular block. The sinkage measuring device is used for sinkage measurement of the air pre-heater rotor under the hot-state working condition.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of subsidence measurement devices under air preheater rotor hot state condition. BACKGROUND

[0002] At present, the adjustment of air preheater rotor radial sealing gap entirely relies on design value, and there is no reliable method for measuring actual rotor subsidence under hot state.

[0003] Air preheater rotor will occur mushroom deformation under hot state, rotor outer ring subsidence, air preheater cold and hot end radial seal will reserve corresponding deformation gap, to ensure the sealing effect after deformation.And cold and hot end radial and annular sealing gap are design value given by theoretical calculation, larger than actual value, plus air preheater annual operation quality can guide smoke wear year by year, still follow design value gap deviation will be larger, influence air leakage rate.To solve this situation, it is necessary to periodically measure actual rotor subsidence to guide cold end radial and annular sealing gap adjustment value during cold state maintenance. SUMMARY

[0004] The utility model aims at solving above-mentioned technical problem, provide a kind of subsidence measurement devices under air preheater rotor hot state condition.

[0005] The above-mentioned purpose is realized by the following technical scheme:

[0006] A kind of subsidence measurement devices under air preheater rotor hot state condition, its composition includes: the adjusting support welded in air preheater cold end, the adjusting support is fixed with measuring block by bolt on it;

[0007] The adjusting support includes fixed plate, and the fixed plate is connected with adjusting plate by bolt;

[0008] The measuring block is aluminium rectangular block.

[0009] The subsidence measurement device under air preheater rotor hot state condition, the fixed plate is rectangular plate, and it has two groups of string type holes thereon.

[0010] The subsidence measurement device under air preheater rotor hot state condition, the adjusting plate is 7 type plate, and four fixing holes are formed in the adjusting plate. Beneficial effects

[0011] 1.The utility model in air preheater hot state operation, rotor outside will accompany the boiler load rise and gradually occur subsidence, thereby with measuring block contact, since measuring block is aluminium, material is relatively soft, in rotor rotation will constantly wear measuring block, in next air preheater cold state maintenance, again enter cold end, measure the clearance between cold end sealing angle steel and measuring block top, i.e.can obtain actual rotor hot state subsidence. Attached Figure Description

[0012] Figure 1 This is the front view of the present invention;

[0013] Figure 2 This is a side view of the present invention;

[0014] Figure 3 for Figure 1 Enlarged view of part A;

[0015] Figure 4 for Figure 2 Enlarged view of part B;

[0016] Figure 5 This is a structural diagram of the fixed plate;

[0017] Figure 6 This is a schematic diagram of the adjustment plate.

[0018] Figure 7 This is a schematic diagram of the measuring block.

[0019] Figure 8 This is a diagram showing the state of the air preheater rotor hot end sinking.

[0020] In the diagram: 1. Hot end of air preheater; 2. Cold end of air preheater; 3. Measuring block; 4. Adjusting plate; 5. Fixing plate; 6. Through hole; 7. Screw hole; 8. Fixing hole. Detailed Implementation

[0021] A device for measuring the subsidence of an air preheater rotor under hot operating conditions, comprising: an adjustment bracket welded to the cold end 2 of the air preheater, wherein a measuring block 3 is fixed to the adjustment bracket by bolts;

[0022] The adjusting bracket includes a fixing plate 5, which is connected to the adjusting plate 4 by bolts;

[0023] The measuring block is a rectangular aluminum block with two screw holes 7 for fixing to the adjusting plate;

[0024] The aforementioned device for measuring the subsidence of the air preheater rotor under hot conditions has a rectangular plate with two sets of serial holes 6 on it.

[0025] The aforementioned air preheater rotor under hot operating conditions subsidence measurement device has a type 7 adjusting plate with four fixing holes 8.

[0026] The position of the adjustment plate can be adjusted by using a perforated design.

[0027] The measuring block is made of pure aluminum, and has a size of 100*100*10mm; a regulating support is welded at the cold end, the measuring block is installed on the regulating support, and is adjusted upward to be close to the sealing angle steel of the cold end rotor with a reserved gap of 10-15mm;

[0028] When the air preheater is in hot state operation, the rotor outside gradually sinks with the increase of the boiler load, thereby contacting the measuring block and continuously wearing, and since the measuring block is soft, the sealing angle steel is not damaged.

[0029] In the next cold state maintenance of the air preheater, the gap between the sealing angle steel of the cold end and the top end of the measuring block is measured when entering the cold end again, and the actual sinking amount of the rotor in hot state can be obtained.

[0030] According to the actual sinking amount (1-2mm allowance can be added), the outside adjustment value of the cold end radial seal is obtained.

[0031] The operation can be repeated after the next hot state operation, so as to ensure the optimal gap in each operation cycle.

[0032] The air preheater rotor hot state and cold state sinking amount can be truly measured by the utility model, reliable parameters are provided for the adjustment of the cold end radial and circumferential sealing gap during the shutdown and maintenance, and the cold end air leakage after repair is effectively reduced.

Claims

1. A device for measuring the subsidence of an air preheater rotor under hot operating conditions, characterized in that: Its components include: an adjustment bracket welded to the cold end of the air preheater, wherein a measuring block is fixed to the adjustment bracket by bolts; The adjusting bracket includes a fixing plate, and the fixing plate and the adjusting plate are connected by bolts; The measuring block is a rectangular aluminum block.

2. The device for measuring the subsidence of the air preheater rotor under hot operating conditions according to claim 1, characterized in that: The fixing plate is a rectangular plate with two sets of perforated holes.

3. The device for measuring the subsidence of the air preheater rotor under hot operating conditions according to claim 2, characterized in that: The adjustment plate is a 7-type plate, and four fixing holes are provided on the adjustment plate.

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