CN110491268A - A kind of mechanical seal test device and method for experimental teaching - Google Patents

A kind of mechanical seal test device and method for experimental teaching Download PDF

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Publication number
CN110491268A
CN110491268A CN201910756942.5A CN201910756942A CN110491268A CN 110491268 A CN110491268 A CN 110491268A CN 201910756942 A CN201910756942 A CN 201910756942A CN 110491268 A CN110491268 A CN 110491268A
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CN
China
Prior art keywords
cover board
seal
ring
spring
sealing
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Pending
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CN201910756942.5A
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Chinese (zh)
Inventor
于春雨
朱小兵
鲁豪杰
黄毓兴
袁梦佳
陶金洋
青显林
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Southwest Petroleum University
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Southwest Petroleum University
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Priority to CN201910756942.5A priority Critical patent/CN110491268A/en
Publication of CN110491268A publication Critical patent/CN110491268A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09BEDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B25/00Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes

Abstract

The invention discloses a kind of mechanical seal test devices and method in experimental teaching, belong to sealing test technical field, including rack, computer, motor, torque tachometer of measuring, bearing block, transmission shaft, seal cavity, fuel tank, bidirectional hydraulic pump, pipeline;The rack installs computer, motor, torque tachometer of measuring, bearing block, transmission shaft, seal cavity, the motor, torque tachometer of measuring, transmission shaft are sequentially connected, the transmission shaft is connected by split pin with convex key with seal cavity, opening passes through the oil inlet and oil outlet of pipeline connection sealing cavity, rack is also equipped with bidirectional hydraulic pump and fuel tank, and fuel tank, bidirectional hydraulic pump and seal cavity pass sequentially through pipeline and connect into circuit.The present invention improves the disassembly convenient degree of the device in seal chamber, realizes replaceable design while test device sealing performance, can carry out experiment test for more mechanically-sealing apparatus.

Description

A kind of mechanical seal test device and method for experimental teaching
Technical field
The invention belongs to sealing test technical field, in particular to a kind of mechanical sealing performance suitable for teaching experiment is surveyed Try device and method.
Background technique
Mechanical seal is one of main means of rotation axis seal, is widely used in industrial processes.In industry In production, mechanical seal is due to the advantages that its leakage rate is few, sealing performance is reliable, frictional dissipation is small, the service life is long, by extensive Ying Yu At sealing including rotary shafts such as reaction kettle, centrifugal pump, centrifuges.Mechanical seal test is the master for evaluating the mechanical sealing performance Want mode and means.The understanding to mechanical seal is improved, for the teaching efficiency of raising mechanical speciality, there is great effect, In teaching process, need to enable by relevant experimental facilities the effect of the more intuitive sensing device of student itself.
Relatively broad at present to use mechanical seal experimental apparatus for testing, mechanical seal test experiments facilitate student couple There is intuitive understanding in principle, process and failure mode of mechanical seal etc., there is weight for traditional mechanical speciality The teaching significance wanted.At present had already appeared on the market some experimental facilities for mechanical sealing performance test, but at present this Structure is complicated for a little experimental facilities, and dismounting trouble replaces part to be measured and generally requires to take considerable time, it is also possible to cause to damage to part It is bad, it is also more demanding to the technology of dismounting person, it does not utilize and carries out universal experimental teaching.Also, existing technical solution is in reality It tests progress and is filled with many uncertain factors in the process, the excessively high laboratory apparatus that may seriously affect of the moulding pressure of seal chamber is set Standby and operator safety, the existing experimental facilities in part has been carried out computer control moulding pressure, but does not account for prominent Hair property high pressure and lead to seal chamber rupture, sealing catastrophic failure, seriously threaten the peace of experiment operator Entirely.Meanwhile mechanical seal relies primarily on the opposite sliding between rotating ring and stationary ring and forms liquid film to play sealing function, but existing Experimental facilities mostly use the structure of not visible structure and material or partial visual greatly, it is difficult to directly outside experimental provision Observe the working condition at sealing liquid film, it is also difficult to see the sealing situation of seal face.In addition to this, the prior art is mentioned The sealing property testing equipment of confession is substantially using non-exchange single diameter main shaft, is applicable only to a kind of axial dimension Sealing device does not have preferable versatility, not can be carried out the mechanical sealing performance test of multiple diameter, is unable to test difference yet Influence of the diameter to mechanical sealing performance.
Summary of the invention
In view of the above-mentioned problems, the present invention provides one kind to be used for experimental teaching mechanical seal test experiments instructional device and side Method improves the disassembly convenient degree of the device in seal chamber, realizes replaceable design, energy while test device sealing performance Experiment test is carried out for more mechanically-sealing apparatus, improves teaching efficiency.
The technical scheme is that
One kind being used for experimental teaching mechanical seal test experiments instructional device, including rack, and the rack is equipped with upper layer and lower layer face Plate, upper layer panel top are sequentially installed with motor, torque tachometer of measuring, bearing block, seal cavity along same axis direction, The motor is equipped with torque tachometer of measuring, and the torque tachometer of measuring is connected with transmission shaft, and the transmission shaft passes through The bearing block is simultaneously fixed by the bearing block, and the transmission shaft end is connected with main shaft, the main shaft and transmission axis connection It is on the outside of the seal cavity, the other end is and big in seal cavity inboard portion length on the inside of the seal cavity In in the seal cavity length of outer side, dismountable mechanical sealing device is equipped on the intracorporal main shaft of the seal chamber; Rack lower layer panel is equipped with fuel tank, and the fuel tank is equipped with pump, and passes through rack by hydraulic line and be connected to sealing Cavity, as feed line, seal cavity is additionally provided with hydraulic line and is directly connected to fuel tank, as flow line.
Further, the seal cavity includes cover board and cylinder, forms cylindrical structure, and cover board is that two block sizes are identical Circular cover, one of middle part have circular hole, as hollow cover board, another piece be used as entity cover board, the seal cavity It is interior to be equipped with dismountable mechanical sealing device;
The hollow cover board of the seal cavity and entity cover board are designed with groove close to edge in the side that it is oppositely arranged, O-ring seal is fitted in the groove, the cylinder is equipped with fin, the fin and the hollow cover board and institute at both ends The groove interference fit of entity cover board is stated, and is caught in groove, connects cover board with cylinder;
The cylinder is equipped with oil inlet and oil outlet, is separately connected feed line and flow line;
The cylinder is externally provided with multiple support plates, the support board ends and the hollow cover board and the fixed company of the entity cover board It connects;
It is additionally provided with pedestal in the seal cavity bottom, the pedestal connect solid with the hollow cover board and the entity cover board It is fixed.
Further, the dismountable mechanical sealing device includes main shaft, pallet, bracket, groups of springs, stationary ring group, rotating ring Group;The pallet, bracket, groups of springs, stationary ring group, rotating ring group are all set in the main shaft side, by main shaft and removable unload the goods from the airplane Tool sealing device realizes seal cavity and extraneous sealing.
Further, the pallet is connected and fixed with hollow cover board, and the bracket is fastened on pallet, the spring Group includes spring fixed ring, spring pressure plate, spring, spring base, and the rotating ring group includes rotating ring, rubber seal axle sleeve, annulus branch Support, the stationary ring group include stationary ring, stationary ring rubber ring, and vacancy is equipped with step to the hollow cover board wherein, and installation is quiet in step Ring rubber ring, stationary ring rubber ring is interior to wrap up stationary ring, and stationary ring end face is contacted with rotating ring, and rotating ring other end is bonded rubber seal axis Set, arch brace are set on the outside of ring seal axle sleeve, and the rubber seal axle sleeve outer diameter is less than rotating ring, and spring base is equipped with for middle part The metal cylinder of step, stepped inner walls are bonded with rotating ring end face, and step outside wall surface is bonded with spring, and the spring other end is connected to Spring fixed ring, spring fixed ring outside are connected to spring pressure plate.
Further, it is fixedly connected between the spring pressure plate and screw bracket by the bolt through screw bracket, bullet By being fixedly connected not through the screw of hollow cover board between spring bracket and hollow cover board.
Further, it is fixedly connected between the spring pressure plate and screw bracket by wing nut and bolt.
Further, the pallet, middle part Circularhole diameter are greater than main shaft, and the gap between circular hole and main shaft is as leakage Mouthful.
Further, support plate is equipped with pressure sensor.
Further, there are many mechanical seal models for the dismountable mechanical sealing device, can be done not according to testing requirement With selection.
Further, described fuel tank the upper side and lower side is respectively equipped with oil outlet and oil return opening;Upside oil outlet passes through pipeline It is connected with the arrival end of pump, the outlet end of pump is parallel with a check valve and electromagnetic relief valve by pipeline, wherein electromagnetic relief valve Entrance is communicated with one-way valved outlet, and electromagnetic relief valve and check valve pass through pipeline again and be connected to cylinder oil inlet;Cylinder oil outlet It has been sequentially connected in series an electromagnet cut off valve and pressure reducing valve by pipeline, then tank drainback mouth is connected to by pipeline.
Further, be additionally provided with computer on the rack, the computer by data line, respectively with motor, turn round Tachometer torquemeter, pressure sensor, electromagnetic relief valve, electromagnet cut off valve, bidirectional hydraulic pump connection.
A method of for experimental teaching mechanical seal test experiments, include the following steps:
S1, as needed, select mechanically-sealing apparatus to be measured, its mechanically-sealing apparatus to be measured be installed to seal cavity In;
S2, the greatest limit pressure value for setting seal cavity, to ensure experiment safety;
Hydraulic oil in fuel tank is pumped into cylinder by S3, starting pump, and the intracorporal pressure of cylinder reaches the minimum for preventing dry grinding phenomenon from occurring After pressure, computer controls electric motor operation;
S4, after electric motor operation is steady, computer controls bidirectional hydraulic pump and starts persistent pressure, until reaching specified experiment pressure Power;
S5, test experiments data, the torque and rotary speed data of torque tachometer of measuring real-time measurement motor, pressure sensor are real When measure the interior pressure data of acrylic cylinder, and pass data back computer;
Stop motor after the completion of S6, test, after motor stops rotating, discharges hydraulic oil, return it to fuel tank.
The beneficial effects of the present invention are:
1. the present invention by computer and motor, torque tachometer of measuring, pressure sensor, electromagnetic relief valve, electromagnet cut off valve, Bidirectional hydraulic pump connection, can realize that whole experiment process is performed fully automatic and is controlled by computer, improve experiment Convenience, operability and safety.
2. mechanical seal part of detecting is designed as detachable changeable type by the present invention, for different major axis diameters, difference Mechanical seal model and type, directly replace corresponding size and model dismountable mechanical sealing device, this not only side Just it repairs and safeguards, also improve the versatility of the set experimental facilities, so that the experimental facilities is suitable for a variety of seal forms, and Leakage hole between pallet and main shaft can be effectively ensured.
3. the present invention is connected using split pin with convex key at transmission shaft with main shaft, needed for selecting screw and wing nut to use Apply the spring of decrement, dismountable mechanical sealing device selects reasonable design of part less, reduces tearing open for experimental facilities It unloads, assemble, replace difficulty.
4. the present invention check valve and electromagnetic relief valve are parallel with before cylinder oil inlet, wherein electromagnetic relief valve entrance with One-way valved outlet communicates.During the experiment, when test pressure increases suddenly and be more than magnetic overflow valve set by safe pressure, Computer will automatically control overflow valve and open simultaneously pressure release.This increases experimental facilities under the premise of guaranteeing normally test Safety.
5. the present invention is recorded and is located to experimental datas such as pressure, torque, revolving speeds in experimentation using computer Reason reduces the error of artificial record and processing experimental data, improves experimental precision.
6. the present invention uses the cylinder of transparent material, convenient for from each angle observation experiment process, improving religion in experimental teaching Effect is learned, is also convenient for observing whether internal structure moves because of dismounting in disassembly process, it is ensured that experiment safety.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the design.
Fig. 2 is the structural schematic diagram of dismountable mechanical sealing device in Fig. 1.
Fig. 3 is the axial plane cross-sectional view of dismountable mechanical sealing device in Fig. 1.
It is as shown in the figure:
1- computer, 2- motor, 3- shaft coupling, 4- torque tachometer of measuring, 5- bearing block, 6- transmission shaft, 7- split pin, 8- The hollow cover board of main shaft, 9-, 10- stationary ring rubber ring, 11- stationary ring, 12- rotating ring, 13- rubber seal axle sleeve, 14- pressure sensor, 15- support plate, 16- acrylic cylinder, 17- spring base, 18- arch brace, 19- spring, 20- entity cover board, 21- spring are solid It is close to determine ring, 22- spring pressure plate, 23- wing nut, 24- screw, 25- screw bracket, 26- pallet, 27- holding screw, 28-O type Seal, 29- pedestal, 30- rack, 31- electromagnet cut off valve, 32- pressure reducing valve, 33- electromagnetic relief valve, 34- check valve, 35- are two-way Hydraulic pump, 36- fuel tank.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
As shown in Figure 1, a kind of be used for experimental teaching mechanical seal test device, including rack 30, computer 1, motor 2, torque tachometer of measuring 4, bearing block 5, transmission shaft 6, seal cavity, fuel tank 36, bidirectional hydraulic pump 35, pipeline;The rack 30 points are upper layer and lower layer, and upper layer is for installing computer, motor 2, torque tachometer of measuring 4, bearing block 5, transmission shaft 6, close Cavity is sealed, the motor 2 and torque tachometer of measuring 4, torque tachometer of measuring 4 and transmission shaft 6 are connected by shaft coupling 3 respectively It connects, 6 right end of transmission shaft is rectangular convex key, and convex key axial centre is equipped with installation through-hole and is used for construction opening pin 7, seal chamber Intracorporal 8 leftmost side of main shaft is equipped with groove and the through-hole for construction opening pin 7, realizes transmission shaft 6 by split pin 7 and convex key It is connected with seal cavity.There are two circular open, openings to pass through the oil inlet of pipeline connection sealing cavity on the upper layer of rack 30 And oil outlet.Bidirectional hydraulic pump 35 and fuel tank 36 are installed in rack lower layer, the both ends of the bidirectional hydraulic pump 35 pass through respectively Pipeline is connected to fuel tank 36 and seal cavity oil inlet, and seal cavity oil outlet is connected to fuel tank 36 by pipeline.
The seal cavity is cylindrical structure, including hollow cover board 9, entity cover board 20, cylinder, support plate 15, pedestal 29, dismountable mechanical sealing device;The cylinder is preferably transparent acrylic cylinder 16, seal cavity left and right ends respectively by Hollow cover board 9 and entity cover board 20 are constituted, and there are annular groove in two cover board inside edges and centre, and groove is close for mounting O-shaped Seal 28, it is that hollow uncovered is cylindric that cylinder 16 is made every effort to overcome in the Asia, and top is equipped with a measuring mouth for installing pressure sensor 14, to measure seal cavity internal pressure, an oil inlet and oil outlet are arranged respectively at bottom, and 16 left and right sides of acrylic cylinder has convex Groove on the inside of rib, fin and hollow cover board 9, entity cover board 20 is interference fit, and O-shaped sealing is mounted between tongue and groove Circle 28 is uniformly distributed there are three rectangular-shape support plate 15 outside acrylic cylinder 16 for sealing, support plate 15 by screw respectively and Hollow cover board 9, entity cover board 20 are connected, and pressure sensor 14 are equipped in top support plate 15, the seal cavity bottom has Pedestal 29 is equipped with step as support, 29 top of pedestal, for laterally across screw and 20 phase of hollow cover board 9 and entity cover board Even;The intracorporal dismountable mechanical sealing device of seal chamber includes main shaft 8, pallet 26, stationary ring rubber ring 13, stationary ring 11, moves Ring 12, rubber seal axle sleeve 13, spring base 17, arch brace 18, spring 19, spring fixed ring 21, spring pressure plate 22, butterfly spiral shell Female 23, screw 24, screw bracket 25, holding screw 27;8 leftmost side of main shaft is equipped with groove and for construction opening pin 7 Through-hole is realized the connection of transmission shaft 6 and main shaft 8 by split pin 7 and convex key, has a circular open among the pallet 26, open Mouth diameter is greater than main shaft 8, and opening is that (since experimental pressure is larger, small part oil is possible to meeting to leakage hole with 8 gap portion of main shaft It is made every effort to overcome in cylinder 16 from Asia and micro-leakage occurs along main shaft 8, the oil mass of this partial compromise is less, can be adhered near leakage hole Main shaft on, do not overflow the other parts of device, wait test after unified recovery and rinsing), pallet 26 by screw with Hollow cover board 9 connects, and 26 interior grooves of pallet are equipped with stationary ring rubber ring 13, and stationary ring rubber ring 13 is equipped with stationary ring 11, stationary ring below 11 and stationary ring rubber ring 13 be interference fit, have the rotating ring 12 being matched therewith on the right side of stationary ring 11, stationary ring 11 and rotating ring 12 are It is tested to seal, rubber seal axle sleeve 13 is furnished on the right side of rotating ring 12, rubber seal axle sleeve 13 and rotating ring 12 are interference fit, the circle Ring support 18 is arranged in the groove of rubber seal axle sleeve 13, and rubber seal axle sleeve 13 is equipped with spring base 17, and spring base 17 is right Side is successively furnished with arch brace 18, spring 19, spring fixed ring 21, spring pressure plate 22, realizes the axial restraint to spring 19.Institute It is uniformly distributed there are three circular hole to state 22 edge of spring pressure plate, has internal screw thread in circular hole, is used for mounting screw 24, is equipped with butterfly on the right side of screw 24 Shape nut 23, left side are equipped with screw bracket 25 and the compression to spring 19 can be realized by rotating clockwise wing nut 23. It is equipped with circular hole on the left of screw bracket 25, for installing holding screw 27, realizes the connection of screw bracket 25 and pallet 26, and to spiral shell Nail bracket 25 plays the role of positioning;There are many mechanical seal models for the dismountable mechanical sealing device, can be done according to testing requirement Difference selection;There are an oil outlet and oil return opening in described 36 the upper side and lower side of fuel tank respectively.Upside oil outlet by pipeline with it is two-way 35 oil inlet of hydraulic pump is connected, and bidirectional hydraulic pumps 35 oil outlets and is parallel with a check valve 34 and electromagnetic relief valve 33 by pipeline, Wherein 33 oil inlet of electromagnetic relief valve is communicated with 34 oil outlet of check valve.Electromagnetic relief valve 33 and check valve 34 are connected by pipeline again It is connected to 16 oil inlet of acrylic cylinder.16 oil outlet of acrylic cylinder has been sequentially connected in series 31 He of electromagnet cut off valve by pipeline Pressure reducing valve 32(also can be used alone electromagnet cut off valve 31, and setting pressure reducing valve 32 is to increase safety coefficient), then pass through pipeline company It is connected to 36 oil return opening of fuel tank;The computer 1 by data line, respectively with motor 2, torque tachometer of measuring 4, pressure sensing Device 14, electromagnetic relief valve 33, electromagnet cut off valve 31,35 connection of bidirectional hydraulic pump.
The present invention also provides the test methods based on above-mentioned apparatus, and steps are as follows:
This experimental provision can according to experiment demand, can the mechanically-sealing apparatus to different model and type carry out experiment test.It is right In the required mechanically-sealing apparatus for carrying out experiment test, suitable main shaft 8, pallet 26, stationary ring rubber ring 13, stationary ring can be selected 11, rotating ring 12, rubber seal axle sleeve 13, arch brace 18, spring base 17, spring 19, spring fixed ring 21, spring pressure plate 22, Screw bracket 25, screw 24, wing nut 23 simultaneously successively assemble it according to required condition, after inspection is errorless, by holding screw 27 screw-ins are installed to hollow cover board by tightening holding screw 27 into the circular hole of screw bracket 25, then by the part assembled On 9.Three pieces of support plates 15 are connected by screw to respectively to the specified location of hollow cover board 9, then will be on the left of acrylic cylinder 16 Tongue be installed in the groove of hollow about 9 two sides of cover board, the tongue phase of the groove and acrylic cylinder 16 of entity cover board 20 Cooperation, and respectively connect entity cover board 20 with support plate 15 by screw.Main shaft 8 and transmission shaft 6 pass through split pin 7 and convex key Connection, hollow cover board 9 and entity cover board 20 are connected by screw with pedestal 29 respectively.
This experimental provision is pressure source with bidirectional hydraulic pump 35, pumps the setting of 35 pressure to bidirectional hydraulic by computer 1 To control moulding pressure.The hydraulic oil for the certain pressure that bidirectional hydraulic pump 35 is pumped out from fuel tank 36 is flowed through unidirectional by pipeline Valve 34, electromagnetic relief valve 33, then be flowed into acrylic cylinder 16 by pipeline.As the pressure in acrylic cylinder 16 reaches After the minimum pressure for preventing dry grinding phenomenon from occurring, computer 1 controls motor 2 and works, and after 2 stable working of motor, calculates Machine 1 controls bidirectional hydraulic pump 35 and starts persistent pressure, until reaching specified experimental pressure.Torque tachometer of measuring 4 is entire real The torque and rotary speed data of real-time measurement motor 2 during testing, the real-time measurement in the entire experiment process of pressure sensor 14 The data of the interior pressure data of acrylic cylinder 16, torque tachometer of measuring 4 and pressure sensor 14 can pass computer 1 back In.Leakage hydraulic oil in experimentation can be collected by the leakage hole being arranged between hollow cover board 9 and main shaft 8.Measurement At the end of experiment, computer 1 controls motor 2 and stops working, and after band main shaft 8 stops rotating completely, computer 1 controls electromagnetism and cuts Only valve 31 is opened, hydraulic oil by oil returning tube from acrylic cylinder 16 followed by electromagnet cut off valve 31 and pressure reducing valve 32, Finally flow back to fuel tank 36.
In addition, presetting the Maximum safe pressure in acrylic cylinder 16 on computer 1 before experiment carries out Value, when being more than maximum safety pressure force value, electromagnetic relief valve 33 is automatically opened, and hydraulic oil flows back to fuel tank 36, it is ensured that experimentation Safety.
This experimental provision simple in structure, good airproof performance, easily operated, easy to disassemble and maintenance can be using more set differences The mechanically-sealing apparatus of specification and model is sealed test experiments, also improves the versatility of the present apparatus, and fuel tank 36 and Asia The design of superpressure relief circuit ensures the safety of experimentation between gram force cylinder 16.Therefore, this experimental provision can be fine Meet mechanical seal test teaching experiment.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification For the equivalent embodiment of equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the technical essence of the invention Any simple modification, equivalent change and modification to the above embodiments, all of which are still within the scope of the technical scheme of the invention.

Claims (10)

1. one kind is used for experimental teaching mechanical seal test experiments instructional device, including rack, the rack is equipped with two-layer panel, Respectively upper layer panel and lower layer's panel, which is characterized in that be sequentially installed with above the panel of upper layer along same axis direction electronic Machine, torque tachometer of measuring, bearing block, seal cavity, the motor are equipped with torque tachometer of measuring, the torque revolving speed Measuring instrument is connected with transmission shaft, and the transmission shaft passes through the bearing block and fixed by the bearing block, the transmission shaft end End is connected with main shaft, and the main shaft and transmission shaft connection place are on the outside of the seal cavity, and the other end is in the seal cavity Side, and be greater than in seal cavity inboard portion length in the seal cavity length of outer side, it is intracorporal in the seal chamber The main shaft is equipped with dismountable mechanical sealing device;Rack lower layer panel is equipped with fuel tank, and the fuel tank is equipped with pump, And rack is passed through by hydraulic line and is connected to seal cavity, as feed line, it is direct that seal cavity is additionally provided with hydraulic line It is connected to fuel tank, as flow line.
2. according to claim 1 a kind of for experimental teaching mechanical seal test experiments instructional device, which is characterized in that The seal cavity includes cover board and cylinder, forms cylindrical structure, cover board is the identical circular cover of two block sizes, wherein one Circular hole is had in the middle part of block, as hollow cover board, another piece is used as entity cover board, and it is close to be equipped with dismountable mechanical in the seal cavity Seal apparatus;
The hollow cover board of the seal cavity and entity cover board are designed with groove close to edge in the side that it is oppositely arranged, O-ring seal is fitted in the groove, the cylinder is equipped with fin, the fin and the hollow cover board and institute at both ends The groove interference fit of entity cover board is stated, and is caught in groove, connects cover board with cylinder;
The cylinder is equipped with oil inlet and oil outlet, is separately connected feed line and flow line;
The cylinder is externally provided with multiple support plates, the support board ends and the hollow cover board and the fixed company of the entity cover board It connects, support plate is equipped with pressure sensor;
It is additionally provided with pedestal in the seal cavity bottom, the pedestal connect solid with the hollow cover board and the entity cover board It is fixed.
3. according to claim 2 a kind of for experimental teaching mechanical seal test experiments instructional device, which is characterized in that The dismountable mechanical sealing device includes main shaft, pallet, bracket, groups of springs, stationary ring group, rotating ring group;The pallet, bracket, Groups of springs, stationary ring group, rotating ring group are all set in the main shaft side, realize sealing by main shaft and dismountable mechanical sealing device Cavity and extraneous sealing;
The pallet, middle part Circularhole diameter are greater than main shaft, and the gap between circular hole and main shaft is as leakage hole.
4. according to claim 3 a kind of for experimental teaching mechanical seal test experiments instructional device, which is characterized in that The pallet is connected and fixed with hollow cover board, and the bracket is fastened on pallet, the groups of springs include spring fixed ring, Spring pressure plate, spring, spring base, the rotating ring group include rotating ring, rubber seal axle sleeve, arch brace, and the stationary ring group includes Stationary ring, stationary ring rubber ring, vacancy is equipped with step to the hollow cover board wherein, installs stationary ring rubber ring, stationary ring rubber in step Stationary ring is wrapped up in circle, stationary ring end face is contacted with rotating ring, and rotating ring other end is bonded rubber seal axle sleeve, and arch brace is set to rotating ring On the outside of sealing axle sleeve, the rubber seal axle sleeve outer diameter is less than rotating ring, and spring base is the metal cylinder that middle part is equipped with step, step Inner wall is bonded with rotating ring end face, and step outside wall surface is bonded with spring, and the spring other end is connected to spring fixed ring, and spring is fixed Spring pressure plate is connected on the outside of ring.
5. according to claim 4 a kind of for experimental teaching mechanical seal test experiments instructional device, which is characterized in that By being fixedly connected through the bolt of screw bracket between the spring pressure plate and screw bracket, spring support and hollow cover board it Between by being fixedly connected not through the screw of hollow cover board.
6. according to claim 5 a kind of for experimental teaching mechanical seal test experiments instructional device, which is characterized in that It is fixedly connected between the spring pressure plate and screw bracket by wing nut and bolt.
7. according to claim 5 a kind of for experimental teaching mechanical seal test experiments instructional device, which is characterized in that There are many mechanical seal models for the dismountable mechanical sealing device, do different selections according to testing requirement.
8. according to claim 6 or 7 a kind of for experimental teaching mechanical seal test experiments instructional device, feature exists In described fuel tank the upper side and lower side is respectively equipped with oil outlet and oil return opening;Upside oil outlet passes through the arrival end phase of pipeline and pump Even, the outlet end of pump is parallel with a check valve and electromagnetic relief valve by pipeline, and wherein electromagnetic relief valve entrance goes out with check valve Mouth communicates, and electromagnetic relief valve and check valve pass through pipeline again and be connected to cylinder oil inlet;Cylinder oil outlet is successively gone here and there by pipeline It is associated with an electromagnet cut off valve and pressure reducing valve, then tank drainback mouth is connected to by pipeline.
9. according to claim 8 a kind of for experimental teaching mechanical seal test experiments instructional device, which is characterized in that Be additionally provided with computer on the rack, the computer by data line, respectively with motor, torque tachometer of measuring, pressure Sensor, electromagnetic relief valve, electromagnet cut off valve, bidirectional hydraulic pump connection.
10. a kind of method for experimental teaching mechanical seal test experiments, using as claimed in claim 9 for testing religion Mechanical seal test experiments instructional device is learned, is included the following steps:
S1, as needed, select mechanically-sealing apparatus to be measured, its mechanically-sealing apparatus to be measured be installed to seal cavity In;
S2, the greatest limit pressure value for setting seal cavity, to ensure experiment safety;
Hydraulic oil in fuel tank is pumped into cylinder by S3, starting pump, and the intracorporal pressure of cylinder reaches the minimum for preventing dry grinding phenomenon from occurring After pressure, computer controls electric motor operation;
S4, after electric motor operation is steady, computer controls bidirectional hydraulic pump and starts persistent pressure, until reaching specified experiment pressure Power;
S5, test experiments data, the torque and rotary speed data of torque tachometer of measuring real-time measurement motor, pressure sensor are real When measure the interior pressure data of acrylic cylinder, and pass data back computer;
Stop motor after the completion of S6, test, after motor stops rotating, discharges hydraulic oil, return it to fuel tank.
CN201910756942.5A 2019-08-16 2019-08-16 A kind of mechanical seal test device and method for experimental teaching Pending CN110491268A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111024329A (en) * 2019-12-28 2020-04-17 清华大学 High-pressure rotation combined sealing element performance detection and test device and method

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