CN206709737U - Steam turbine differential expansion and axial displacement calibration equipment - Google Patents

Abstract

Steam turbine differential expansion and axial displacement calibration equipment, including bottom plate, bar shaped elongated hole is offered on bottom plate, governor motion is fixedly connected on bottom plate, governor motion includes a contiguous block, hole is offered on the base of contiguous block, base is bolted to connection with bottom plate, the hole of length direction is offered on contiguous block, there is a U-shaped breach on contiguous block, left regulation wheel is provided with U-shaped breach, left regulation wheel offers centre bore, an adjustment axis is equipped with the hole of length direction, one section is worm screw among in adjustment axis, the wrom tooth to match with worm screw is provided with the hole wall of center, worm screw section in adjustment axis is equipped with the centre bore of left regulation wheel, two end faces of contiguous block are stretched out at the both ends of adjustment axis, mouth envelope is connected with one or two end face of contiguous block, copper sheathing is provided with mouth envelope, adjustment axis is located in copper sheathing.The present apparatus is very flexibly practical.

Description

Steam turbine differential expansion and axial displacement calibration equipment

Technical field

It the utility model is related to the calibration equipment in steam turbine maintenance, more particularly to steam turbine differential expansion and axial displacement verification dress Put, belong to electric power factory equipment technical field.

Background technology

When steam turbine starts heating or cooling out of service and when load changes, cylinder and rotor can all produce Thermal expansion or cooling meat.Because rotor heated surface area is bigger than cylinder, and rotor mass ratio it is corresponding cylinder it is small, steam It is larger to the exothermic coefficient of rotor surface.Therefore, under the same conditions, the temperature change of rotor is faster than cylinder, rotor and cylinder Between differential expansion be present, and this difference refers to rotor for cylinder, therefore referred to as relative expansion is poor（I.e. swollen difference）.Traditionally Swollen difference when regulation rotor expansion is more than cylinder expansion is just swollen difference, such as when the vapor (steam) temperature for entering steam turbine is significantly raised Or during steam turbine warming-up, expanded by heating, rotor expand after being heated and wanted because quality relative cylinder is small simultaneously for rotor and cylinder It hurry up, swell increment is greater than the swell increment of cylinder in the axial direction, shows as just swollen difference.When steam turbine works, it also occur that axle position Move, axial displacement is with swollen poor zero point at thrust pad, and when axial displacement changes, although its numerical value is smaller, big axle is total Displacement change axial displacements be on the occasion of when, big axial generator direction displacement, swollen difference is to negative value direction change, axial position When shifting to negative value direction change, turbine rotor is to the displacement of headstock direction, and swollen difference is on the occasion of direction change.In order to ensure steamer Machine it is safe for operation, have strict regulation and in real time monitoring to swollen poor, axial displacement, current monitoring passes through sensor probe To realize, in order to ensure the accuracy of monitoring, it is intended to linearly verify it after probe installs, during inspection, by axle It is arranged on to displacement transducer support frame on bearing seat of steam turbine, sensor is arranged on support frame, it is desirable to the center of sensor The center line of line and turbine shaft is mutually perpendicular to, and fore-lying device is installed to scene, and wiring, confirms that measuring system wiring is correct, peace Install and set up amesdial after finishing, according to manufactory's range, both forward and reverse directions gamut is verified between shaft position sensor and detection plate Gap, amesdial reading, fore-lying device voltage, TSI racks are recorded respectively and shows that gap, DCS show gap, verification data error should Meet《People's Republic of China's power industry standard DL/T 1012-2006 Steam Turbine in Fire Power Plant monitoring and protection system Acceptance Test code》, error is less than ± 3%, at present, the support of the band of equipment manufacturer activity due to the specificity of its installation site, And the limitation of range, it can only be used as particular probe, without universal, cause other displacement types probe can not be at the scene Actual bracing wire, even, all supports of some units are stiff support, and many difficulties are brought to service work.

The content of the invention

When the purpose of this utility model is to overcome current steam turbine installation and repairing sensor probe support it is existing on State problem, there is provided a kind of steam turbine differential expansion and axial displacement calibration equipment.

To realize the purpose of this utility model, following technical schemes is employed：Steam turbine differential expansion and axial displacement verification dress Put, including bottom plate, bar shaped elongated hole is offered on bottom plate, governor motion is fixedly connected on bottom plate, described governor motion bag A contiguous block is included, hole is offered on the base of contiguous block, base is bolted to connection with bottom plate, and length is offered on contiguous block The hole in direction is spent, contiguous block has a U-shaped breach for running through front-back, regulation is provided with U-shaped breach in the longitudinal direction Wheel, left regulation wheel offers centre bore, is equipped with an adjustment axis in the hole of length direction, in described adjustment axis among one section For worm screw, the wrom tooth to match with worm screw is provided with the hole wall of center, the worm screw section in adjustment axis is equipped with left regulation wheel In centre bore, two end faces of contiguous block are stretched out at the both ends of adjustment axis, are connected with one or two end face of contiguous block Mouth envelope, mouth are provided with copper sheathing in sealing, and adjustment axis is located in copper sheathing, further, connection is connected with adjustment axis at one end Disk, terminal pad center are fixedly connected in adjustment axis, and connecting bracket is fixedly connected with terminal pad, further, the bottom of at One end of plate is connected with support connection support, and described support connection support upper end has a groove-shaped notch, on the front and rear wall of groove-shaped notch Screw is begun with, clamping screw is provided with screw.

Actively advantageous effects of the present utility model are：The present apparatus using when sensor probe is connected to the present apparatus Adjustment axis or terminal pad or terminal pad on the support that connects, by rotating left regulation wheel, adjustment axis can be driven to move axially, The contact of dial gauge is withstood on on regulation shaft moving part, the axial movement distance of adjustment axis can be accurately recorded, in difference Steam turbine on can complete steam turbine differential expansion and axial displacement verification, and sensor probe can be connected to tune according to operating mode On the support of nodal axisn either end, it can also be connected in support connection support, it is very flexibly practical.

Brief description of the drawings

Fig. 1 is length direction section schematic elevation view of the present utility model.

Fig. 2 is the schematic diagram of present apparatus connection probe and dial gauge.

Fig. 3 is support connection support schematic side view.

Embodiment

In order to more fully explain implementation of the present utility model, there is provided embodiment of the present utility model.These implement real Example is only to elaboration of the present utility model, does not limit the scope of the utility model.

Carry out detailed explanation to the utility model with reference to accompanying drawing, in accompanying drawing each mark for：1：Bottom plate；2：Contiguous block；3： Connecting bolt；4：Adjustment axis；5：The hole of length direction；6：U-shaped breach；7：Terminal pad；8：Connecting bracket；9：Left regulation wheel；10：Copper Set；11：Mouth envelope；12：Support connection support；13：Clamping screw；14：Probe；15：Dial gauge；16：Groove-shaped notch.Such as accompanying drawing institute Show, steam turbine differential expansion and axial displacement calibration equipment, including bottom plate 1, bar shaped elongated hole is offered on bottom plate, bar shaped elongated hole is in figure It is not shown, governor motion is fixedly connected on bottom plate, and described governor motion includes a contiguous block 3, on the base of contiguous block 3 Hole is offered, base is bolted to connection with bottom plate, and the connecting bolt shown in Fig. 3 is the spiral shell of connect base and bottom plate Bolt, connecting bolt are located in the hole on the bar hole and base of bottom plate respectively, and the hole 5 of length direction is offered on contiguous block 3, Contiguous block has a U-shaped breach 6 for running through front-back in the longitudinal direction, and left regulation wheel 9, left regulation wheel are provided with U-shaped breach 6 9 offer centre bore, and an adjustment axis 4 is equipped with the hole 5 of length direction, and middle one section is snail in described adjustment axis 4 Bar, the wrom tooth to match with worm screw is provided with the center hole wall of left regulation wheel 9, worm screw is not shown with wrom tooth in figure, regulation Worm screw section on axle 4 is equipped with the centre bore of left regulation wheel 9, and two ends of contiguous block 3 are stretched out at the both ends of adjustment axis 4 Face, mouth envelope is connected with one or two end face of contiguous block, is respectively provided with mouth envelope in figure in two end faces of contiguous block, 11 are Mouth envelope, mouth envelope 11 are bolted on contiguous block end face, are provided with copper sheathing in mouth envelope, 10 be copper sheathing, and adjustment axis 4 is located in In copper sheathing 10, adjustment axis radially coordinates with copper sheathing for gap, and terminal pad 7 is connected with adjustment axis at one end, connects disk center Position is fixedly connected in adjustment axis 4, and connecting bracket 8 is fixedly connected with terminal pad 5, and support is connected with one end of bottom plate and is connected Support 12 is connect, described support connection support 12 upper end has groove-shaped notch 16, screw is begun with the front and rear wall of groove-shaped notch 16, Clamping screw is provided with screw, 13 show connecting bolt.Fig. 2 is that signal is overlooked in a kind of connection of the present apparatus in verification Figure, during verification, the connecting rod that dial gauge 15 is carried by it is fixed, and the movable contact vertical top of dial gauge is visited in rack surface First 14 are connected on support, rotate left regulation wheel, and the worm screw section in adjustment axis moves axially under wrom tooth effect, drive terminal pad and Support leads to movement, and the displacement of probe is identical with adjustment axis, and mobile actual range is recorded by dial gauge to be used for Verification.Fig. 2 is a kind of connected mode, because there is attachment structure at base both ends, can also use and be connected in the other end with suitable Answer the verification operation under different situations.

After embodiment of the present utility model is described in detail, one of ordinary skilled in the art is clearly understood that, Above-mentioned claim is not departed from various change and modification can be carried out under spirit, it is all according to the technical essence of the utility model Any simple modification, equivalent change and modification made to above example, the scope of technical solutions of the utility model is belonged to, And the utility model is also not only restricted to the embodiment of example in specification.

Claims (3)

1. steam turbine differential expansion and axial displacement calibration equipment, including bottom plate, it is characterised in that：Bar shaped elongated hole is offered on bottom plate, Governor motion is fixedly connected on bottom plate, and described governor motion includes a contiguous block, and hole, bottom are offered on the base of contiguous block Seat is bolted to connection with bottom plate, and the hole of length direction is offered on contiguous block, and contiguous block has one in the longitudinal direction Through the U-shaped breach of front-back, left regulation wheel is provided with U-shaped breach, left regulation wheel offers centre bore, in the hole of length direction In be equipped with an adjustment axis, in described adjustment axis among one section be worm screw, be provided with the hole wall of center and match with worm screw Wrom tooth, the worm screw section in adjustment axis is equipped with the centre bore of left regulation wheel, and contiguous block is stretched out at the both ends of adjustment axis Two end faces, mouth envelope is connected with one or two end face of contiguous block, is provided with copper sheathing in mouth envelope, adjustment axis is located in copper In set.

2. steam turbine differential expansion according to claim 1 and axial displacement calibration equipment, it is characterised in that：Adjustment axis at one end On be connected with terminal pad, terminal pad center is fixedly connected in adjustment axis, and connecting bracket is fixedly connected with terminal pad.

3. steam turbine differential expansion according to claim 1 and axial displacement calibration equipment, it is characterised in that：Connect in one end of bottom plate Support connection support is connected to, described support connection support upper end has arc notch, spiral shell is begun with the front and rear wall of arc notch Hole, clamping screw is provided with screw.