CN206920091U - A kind of double-cylinder type packing performance detection tester - Google Patents

A kind of double-cylinder type packing performance detection tester Download PDF

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Publication number
CN206920091U
CN206920091U CN201720809384.0U CN201720809384U CN206920091U CN 206920091 U CN206920091 U CN 206920091U CN 201720809384 U CN201720809384 U CN 201720809384U CN 206920091 U CN206920091 U CN 206920091U
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China
Prior art keywords
cylinder
rotor
sealing
double
performance detection
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CN201720809384.0U
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Chinese (zh)
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陈浩
吴峥峰
曾庆猛
张元舒
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Huadian Electric Power Research Institute Co Ltd
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Huadian Electric Power Research Institute Co Ltd
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Abstract

It the utility model is related to a kind of double-cylinder type packing performance detection tester, including rotor, cylinder, seal rotating disk, guide rail and several pressure sensors, the rotor is connected by shaft coupling with variable-frequency motor, the variable-frequency motor range of speeds is 0~6000r/min, the rotor is supported by thrust bearing and journal bearing, two balancing frames are provided with the middle part of the rotor, the balancing frame is arranged between thrust bearing and journal bearing, the variable-frequency motor, thrust bearing and journal bearing pass through electric machine support respectively, Thrust bearing support and journal bearing support are fixedly connected with basis.The utility model saves the set-up time for prior art, improves testing efficiency, can be directed to different model packing and carry out test job, test scope is wide.

Description

A kind of double-cylinder type packing performance detection tester
Technical field
The utility model belongs to field of sealing technology, more particularly to a kind of double-cylinder type packing performance detection tester.
Background technology
In Turbo-generator Set, the effect of flow passage component packing is to prevent steam leakage of not doing work, to reduce thermal loss, Entering next stage after ensureing the abundant expansion work of steam, its sealing property directly affects steam turbine internal efficiency, according to statistics, Labyrinth clearance often increases 0.5mm, and corresponding stage efficiency can decline 4%~6%.It is efficiently close as steam turbine high parameterization develops Encapsulation technique is key issue urgently to be resolved hurrily, and advanced packing is significantly reduced leakage rate, and improves unit operation stability.
Carry out packing research at present and mainly pass through two kinds of approach:Field test research and bench run research, because of scene The reasons such as experimental study cost height, potential safety hazard, bench run research are still Main Means, and Test-bed Design should focus on to consider Tested packing changes convenience and test function integrity.The patent document of Patent No. 201110389715.7 discloses a kind of dynamic Seal test device and seal clearance method of adjustment, using single-cantilever structure, it can be tested for sealing leak amount, but can not Carry out sealed motive force characteristic research, on the basis of cylinder is fixed on, changes tested sealing underaction, cylinder need to be disassembled, test work Make less efficient.
Utility model content
For being tested in the prior art, packing changes complexity, test function is single and can not take into account packing static characteristic simultaneously The problems such as with Research on Dynamic Characteristic, the utility model provide a kind of set that test scope is wide, dismounting workload is small, simple in construction Cylinder formula packing performance detection tester, including:Rotor, cylinder, sealing rotating disk, guide rail and several pressure sensors, institute State rotor to be connected with variable-frequency motor by shaft coupling, the variable-frequency motor range of speeds is 0~6000r/min, and the rotor leads to Thrust bearing and journal bearing support are crossed, is provided with two balancing frames in the middle part of the rotor, the balancing frame is arranged in thrust bearing Between journal bearing, the variable-frequency motor, thrust bearing and journal bearing respectively by electric machine support, Thrust bearing support and Journal bearing support is fixedly connected with basis.
Preferably, the cylinder is packaged type, can be moved by the guide rail on the basis of being fixed on along axis direction, The cylinder is with basis to be rigidly connected, and the middle part of the cylinder head portions is provided with admission line, and the admission line is provided with whirlpool Flowmeters.When the cylinder is that the advantage of mobile form is to start test job, cylinder and sealing rotating disk are departed from, can be with Tested packing element replacement is realized under the premise of cylinder is not disassembled, improves testing efficiency.It is different that turbine flowmeter act as test The leakage mass flow of radial clearance and different types packing.
Preferably, the cylinder, by spring and air cylinder support elastic connection, the air cylinder support is along guide rail in axle Line direction may move, and the spring is extension spring mode.The cylinder is elastic bearing mode, for studying packing dynamic characteristics, Compared to being rigidly connected, air-flow power recognition capability and precision are improved.Stage clip mode is contrasted, extension spring mode stability is higher.
Preferably, the sealing rotating disk is connected with rotor by lock pin, sealing rotating disk is detachable, to change different sizes Sealing rotating disk is matched with tested packing.
Preferably, the cylinder is formed with sealing rotating disk presses chamber, medium fully buffers in described pressure intracavitary Enter tested packing after pressure, reduce pressure oscillation, improve the pressure test degree of accuracy.
Preferably, sealed chamber is formed between the tested packing, cylinder, sealing rotating disk, in the sealed chamber Pressure sensor is set, the pressure sensor is fixed on cylinder by sealing bolt, and pressure probe is located in sealed chamber, The pressure sensor is arranged circumferentially along cylinder, quantity >=4.
Preferably, the sealing rotating disk is provided with and matches somebody with somebody repeated hole, described to be circumferentially evenly arranged with repeated hole, adjacent counterweight Hole is 15 ° with sealing center of turntable angle.
Compared with prior art, the utility model proposes a kind of double-cylinder type packing performance detection tester beneficial to effect Fruit is as follows:
(1) cylinder is double-cylinder type, can be moved along axis direction, is located at rotor tip, when changing tested packing element without Cylinder and hoisting rotor need to be disassembled, tested packing can be inserted in sealing rotating disk along axis direction after installing, when saving installation Between, improve testing efficiency.
(2) it is detachable to seal rotating disk, is matched with changing different size sealing rotating disks with tested packing, difference can be directed to Model packing carries out test job, and test scope is wide.
(3) test platform can carry out the test of packing sealing characteristics and dynamic characteristics test simultaneously, only need to switch corresponding gas Cylinder matches with sealing rotating disk, and the cylinder of rigid support is selected when sealing characteristics are tested, selection elasticity branch when dynamic characteristics is tested The cylinder of support.
Brief description of the drawings
In order to illustrate more clearly of the present invention, the required accompanying drawing used is simply situated between in being described below to embodiment Continue.It should be evident that drawings in the following description are only the description to embodiments of the invention, for ordinary skill For personnel, without having to pay creative labor, simple deformation or title can also be carried out according to technical scheme Change, or customary means is taken, goal of the invention can also be realized.
Fig. 1 is the test platform structure schematic diagram that the utility model is used to test sealing characteristics;
Fig. 2 is the test platform structure schematic diagram that the utility model is used to test dynamic characteristics;
Fig. 3 is the utility model sealing rotating disk side view;
Fig. 4 is the utility model A partial schematic diagrams.
Label declaration:1- variable-frequency motors, 2- rotors, 3- shaft couplings, 4- thrust bearings, 5- balancing frames, 6- journal bearings, 7- With repeated hole, 8- sealing rotating disks, 9- is tested packing, 10- cylinders, 11- turbine flowmeters, 12- admission lines, 13- guide rails, 14- bases Plinth, 15- electric machine supports, 16- Thrust bearing supports, 17- journal bearing supports, 18- pressure sensors, 19- press chamber, 20- gas Jar support, 21- springs, 22- sealed chambers.
Embodiment
With reference to embodiment, the present invention is described in further detail, following examples be explanation of the invention and The invention is not limited in following examples.
Embodiment 1.
Referring to Fig. 1, seal leakage can be carried out by the present embodiment and antiwear characteristic is studied, a kind of double-cylinder type packing performance inspection Experiment device is tested, including:Rotor 2, cylinder 10, sealing rotating disk 8, guide rail 13 and several pressure sensors 18, rotor 2 pass through Shaft coupling 3 is connected with variable-frequency motor 1, and the range of speeds of variable-frequency motor 1 is 0~6000r/min, when under other specification permanence condition, Regulation variable-frequency motor 1 can study influence of the rotating speed to seal leakage characteristic.
Rotor 2 is supported by thrust bearing 4 and journal bearing 6 in the present embodiment, and the middle part of rotor 2 is provided with two balancing frames 5, Balancing frame 5 is arranged between thrust bearing 4 and journal bearing 6, and variable-frequency motor 1, thrust bearing 4 and journal bearing 6 pass through respectively Electric machine support 15, Thrust bearing support 16 and journal bearing support 17 are fixedly connected with basis 14.
Cylinder 10 is packaged type in the present embodiment, can be moved by the guide rail 13 being fixed on basis 14 along axis direction Dynamic, the middle part of the end of cylinder 10 is provided with admission line 12, and the admission line 12 is provided with turbine flowmeter 11, cylinder 10 Pressure chamber 19 is formed with sealing rotating disk 8, medium flows into pressure chamber 19 by admission line 12, is pressed pressing abundant buffering in chamber 19 Enter tested packing 9 afterwards, flow out cylinder 10 by being tested packing 9 and sealing the radial clearance between rotating disk 8, pass through turbine flowmeter 11 test record seal leakage amounts.
Seal rotating disk 8 in the present embodiment to be connected by lock pin with rotor 2, sealing rotating disk 8 is detachable, to change different sizes Sealing rotating disk 8 is matched with tested packing 9, improves test platform test scope.As shown in figure 4, tested packing 9, cylinder 10th, sealed chamber 22 can be formed between sealing rotating disk 8, pressure sensor 18 is set in sealed chamber 22, pressure sensor 18 leads to Cross sealing to be bolted on cylinder 10, pressure probe is located in sealed chamber, and pressure sensor 18 is circumferentially uniform along cylinder Arrangement, quantity >=4, each average pressure of sealed chamber 22 is tested by pressure sensor, obtains packing pressure ratio, the parameter is Evaluate one of important parameter of packing performance.
Match somebody with somebody repeated hole 7 as shown in figure 3, sealing rotating disk 8 in the present embodiment and being provided with, be circumferentially evenly arranged with repeated hole 7, phase Neighbour is 15 ° with repeated hole 7 and sealing rotating disk 8 angle, passes through adding with the rational position of repeated hole 7 in balancing frame 5 and sealing rotating disk 8 Weight, to rotor-support-foundation system dynamic balance treatment, the vibration data of rotor 2 can be improved.
Embodiment 2.
Referring to Fig. 2, sealed motive force characteristic research can be carried out by the present embodiment, cylinder 10 and air cylinder support in the present embodiment 20 be elastic connection, up and down four direction, and each direction is provided with two springs 21, to ensure the stability of cylinder 10, spring 21 use extension spring form, and air cylinder support 20 is fixedly connected by guide rail 13 with basis 14, and admission line 12 is located at cylinder 10 axially Medium position, and 4 are set altogether along 45 ° of directions, it is middle part intake method.
When being tested in the present embodiment, gas that can be with recognition reaction on cylinder 10 by measuring the vibratory response of cylinder 10 Power is flowed, sealed motive force characteristic is calculated by vibratory response and air-flow power, vibratory response sensitivity is higher, and air-flow power characteristic quantity is just More obvious, sealed motive force characteristic recognition accuracy is higher.Cylinder 10 is to improve vibration to ring using the purpose of elastic bearing mode Answer sensitivity.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art Member, without departing from the inventive concept of the premise, can also make some improvements and modifications, these improvements and modifications also should be regarded as In protection scope of the present invention.Although the present invention is disclosed as above with embodiment, it is not limited to the protection of the present invention Scope, any technical staff for being familiar with this technology, in the variation and retouching made without departing from the spirit and scope of the invention, Protection scope of the present invention all should be belonged to.

Claims (6)

  1. A kind of 1. double-cylinder type packing performance detection tester, it is characterised in that including:Rotor, cylinder, sealing rotating disk, guide rail And several pressure sensors, the rotor are connected by shaft coupling with variable-frequency motor, the variable-frequency motor range of speeds is 0 ~6000r/min, the rotor are supported by thrust bearing and journal bearing, and two balancing frames, institute are provided with the middle part of the rotor State balancing frame to be arranged between thrust bearing and journal bearing, the variable-frequency motor, thrust bearing and journal bearing pass through respectively Electric machine support, Thrust bearing support and journal bearing support are fixedly connected with basis;The cylinder is movable type, by being fixed on On the basis of guide rail can be moved along axis direction, the cylinder with basis to be rigidly connected, the middle part of the cylinder head portions Provided with admission line, the admission line is provided with turbine flowmeter.
  2. A kind of 2. double-cylinder type packing performance detection tester according to claim 1, it is characterised in that:The cylinder leads to Spring and air cylinder support elastic connection are crossed, the air cylinder support may move along guide rail in axis direction, and the spring is extension spring Mode.
  3. A kind of 3. double-cylinder type packing performance detection tester according to claim 1, it is characterised in that:The sealing turns Disk is connected with rotor by lock pin, and sealing rotating disk is detachable, is matched with changing different size sealing rotating disks with tested packing.
  4. A kind of 4. double-cylinder type packing performance detection tester according to claim 1 or 2, it is characterised in that:The gas Cylinder forms with sealing rotating disk and presses chamber, and medium enters tested packing after described pressure intracavitary fully buffers pressure.
  5. A kind of 5. double-cylinder type packing performance detection tester according to claim 1, it is characterised in that:The tested vapour Envelope, cylinder, sealing rotating disk form sealed chamber, pressure sensor are set in the sealed chamber, the pressure sensor leads to Cross sealing to be bolted on cylinder, pressure probe is located in sealed chamber, and the pressure sensor is circumferentially uniform along cylinder Arrangement, quantity are no less than 4.
  6. A kind of 6. double-cylinder type packing performance detection tester according to claim 2, it is characterised in that:The sealing turns Disk, which is provided with, matches somebody with somebody repeated hole, described to be circumferentially evenly arranged with repeated hole, and adjacent repeated hole of matching somebody with somebody is with sealing center of turntable angle as 15 °.
CN201720809384.0U 2017-07-06 2017-07-06 A kind of double-cylinder type packing performance detection tester Active CN206920091U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201720809384.0U CN206920091U (en) 2017-07-06 2017-07-06 A kind of double-cylinder type packing performance detection tester

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201720809384.0U CN206920091U (en) 2017-07-06 2017-07-06 A kind of double-cylinder type packing performance detection tester

Publications (1)

Publication Number Publication Date
CN206920091U true CN206920091U (en) 2018-01-23

Family

ID=61335554

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201720809384.0U Active CN206920091U (en) 2017-07-06 2017-07-06 A kind of double-cylinder type packing performance detection tester

Country Status (1)

Country Link
CN (1) CN206920091U (en)

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