CN109632288B - Experimental device for divide chamber to exert pressure and detect sealing performance - Google Patents
Experimental device for divide chamber to exert pressure and detect sealing performance Download PDFInfo
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- CN109632288B CN109632288B CN201910027273.8A CN201910027273A CN109632288B CN 109632288 B CN109632288 B CN 109632288B CN 201910027273 A CN201910027273 A CN 201910027273A CN 109632288 B CN109632288 B CN 109632288B
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- 238000007789 sealing Methods 0.000 title claims abstract description 132
- 230000007246 mechanism Effects 0.000 claims abstract description 67
- 239000012530 fluid Substances 0.000 claims abstract description 26
- 238000003756 stirring Methods 0.000 claims abstract description 12
- 239000003921 oil Substances 0.000 claims description 13
- 230000005540 biological transmission Effects 0.000 claims description 10
- 239000010720 hydraulic oil Substances 0.000 claims description 4
- ORILYTVJVMAKLC-UHFFFAOYSA-N Adamantane Natural products C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 23
- 238000011160 research Methods 0.000 abstract description 4
- 238000013461 design Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 239000002002 slurry Substances 0.000 description 9
- 238000002474 experimental method Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 7
- 239000004519 grease Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000005299 abrasion Methods 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000001125 extrusion Methods 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 239000013049 sediment Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004576 sand Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000005653 Brownian motion process Effects 0.000 description 2
- 238000005537 brownian motion Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009545 invasion Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/005—Sealing rings
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Sealing Devices (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model provides a divide chamber to exert pressure and detect sealing performance's test device, has solved current test device and can't simulate rubber seal and carry out sealing performance research scheduling problem under complicated operating mode, including frame, the experimental mechanism of equipment on the frame, reversing mechanism, charging mechanism, pressurizing mechanism, its technical essential is: the box body of the experimental mechanism is divided into a left sealing cavity and a right sealing cavity by a rotary piston of which the periphery is sleeved with a sealing ring, the rotary piston on the central rotary shaft is connected with a torque rotation speed sensor and a hydraulic motor on the same axis, and the impeller is connected with the stirring motor on the same axis; the left and right charging hoppers of the charging mechanism are fixed above the charging holes of the left and right sealing cavities, and the left and right high-pressure connectors of the pressurizing mechanism are respectively communicated with the left and right sealing cavities. The device has the advantages of reasonable structural design, accurate simulation of on-site working conditions, uniform loading, convenient adjustment, easy operation and wide pressure application range, and completely meets the sealing performance requirements under the conditions of different fluid pressures, different rotating speeds and different working media.
Description
Technical Field
The invention relates to an experimental device for testing the sealing performance of a main drive of a shield machine, in particular to a testing device for detecting the sealing performance by pressure applied by a cavity. The friction and wear test device is mainly used for simulating a main driving sealing ring, and is used for testing the sealing performance of the sealing ring under the working conditions of grease, sediment and other mediums and different fluid pressures of a left sealing cavity and a right sealing cavity when the friction pair is in surface contact with the bottom surface and the side surface of a groove of a rotary piston and the inner wall of an outer ring.
Background
Currently, slurry shield machines are widely used in excavating underground or submarine tunnels. In the actual use process, the working condition of the slurry shield machine is complex, and the slurry shield machine is required to bear certain fluid pressure and seal slurry and other mediums. The traditional earth pressure balance shield machine uses the lip seal ring to ensure the sealing performance, but the lip seal ring bears the maximum fluid pressure of 0.8MPa, and the fluid pressure in the submarine tunnel is generally 1.5MPa, so that a reasonable sealing ring is required to be reselected to ensure the sealing performance of the main drive of the shield machine, the examples of the O-shaped sealing ring and the star-shaped sealing ring are more in the prior art, and the two sealing rings are preferentially selected in the prior experimental stage. In order to prevent the invasion of corrosive media such as outside dregs, muddy water and the like, whether the rubber sealing ring is applied to dynamic sealing or static sealing, reasonable sealing performance is required to be ensured. The rubber sealing ring is not only subject to material loss caused by extrusion and shearing of solid particles in corrosive media such as outside dregs, muddy water and the like, but also subject to swelling corrosion of the liquid medium, so that the sealing performance of the rubber material is greatly reduced. When the sealing ring is put into use, in order to ensure that the sealing ring has reasonable compression rate, the initial compression rate between the sealing ring and the outer shaft is generally the maximum value. After a period of rotational movement, the cutting of sand particles and the extrusion and shearing of the outer shaft will lead the rubber sealing ring to wear, the compression rate between the rubber sealing ring and the outer shaft will be reduced, when the compression rate is reduced to a certain extent, the contact stress generated by extrusion is smaller than the fluid pressure, and the rubber sealing ring has sealing failure. It can be seen that the rubber sealing ring is worn along with the sealing ring in the moving process of dynamic sealing, the compression ratio can be reduced, the compression ratio is selected to be too large, the contact area between the rubber sealing ring and the outer shaft is too large, and overheating and blocking can occur. The problem from the initial compression rate to the abrasion failure of the rubber sealing ring can be directly related to the service performance and service life of the slurry shield machine, which is always the most concerned problem in the field of slurry shield machines. In order to study and improve the wear resistance and the service life of the rubber sealing ring, a proper friction and wear testing machine which is suitable for the actual working condition is required to be selected for carrying out a pressure-resistant friction and wear test on the rubber sealing ring.
At present, aiming at the shield rubber sealing technology, the domestic advanced technology can reach 1.7MPa, and the foreign advanced technology can reach 4.4MPa. The normal working water pressure of the experimental device meeting the requirements should reach 0-3 MPa, and the high water pressure environment can be well simulated. When the rubber sealing ring is acted by fluid pressure, deformation and contact stress are generated on the contact surface, and additional stress is generated on the contact surface, namely, when the contact stress generated by high water pressure on the upper contact surface and the lower contact surface of the rubber sealing ring is larger than the fluid pressure, the sealing performance is also satisfied.
The abrasion gap adjustment type ring block friction and abrasion tester disclosed in the patent publication No. CN105158100B is used for researching the tribological properties of a rubber test block and a metal test ring pair in a liquid medium containing solid particles. The technical scheme disclosed by the utility model is as follows: the device comprises a machine base, a power and transmission mechanism fixed on the machine base, a feed box provided with a loading mechanism and a test mechanism, and a measurement control loop, wherein the power and transmission mechanism comprises a main shaft, a transmission shaft and an output shaft of a servo motor, wherein the main shaft is assembled in the main shaft box and is connected on the same axis through a coupling, the transmission shaft is fixed with a torque rotation speed sensor, and the output shaft is fixed with the servo motor. The friction abrasion simulation device mainly solves the problems that in the prior art, in the test process, friction abrasion of a rubber ring in actual working conditions such as mixed sediment cannot be simulated. The experimental mechanism can be used for researching the tribological performance of the rubber test block and the test ring under the working condition of the viscous liquid medium containing solid particles when the rubber test block and the test ring are in clearance, but can not meet the requirements of researching the sealing performance and friction and wear experiments of the rubber sealing ring under the environment of bearing pressure such as under water under the complex working condition of simulating the application of fluid pressure on the side surface of the rubber ring.
At present, the main problem of the domestic slurry shield machine is to select a proper sealing element. The working environment of the shield machine is generally a mixture of slurry, sand and other mediums, and the mediums enter the machine, so that immeasurable friction damage is caused to internal parts of the machine, and the service life of the machine is greatly reduced. In addition, the liquid medium has the characteristic of Brownian motion, and a small amount of sediment in the medium moves along with the Brownian motion and passes through the rubber sealing piece. The working environment of the shield machine is generally 1-1.5 MPa, and when the medium in the liquid just enters the cavity, the cavity needs to be sprayed with lubricating grease and the working pressure of the other side is larger than that of the other side. It is therefore necessary to design a testing machine for rubber seals that will still ensure tightness under conditions of different pressures and medium conditions.
Disclosure of Invention
The invention aims to provide a testing device for detecting sealing performance by pressure application of a split cavity, which solves the problems that the existing sealing testing device cannot simulate the sealing performance research of a rubber sealing ring under complex working conditions, and the like.
The technical scheme adopted by the invention is as follows: the experimental device for detecting sealing performance by pressing in the split cavity comprises a machine base, an experimental mechanism assembled on the machine base, a reversing mechanism, a feeding mechanism and a pressurizing mechanism, and is technically characterized in that: the inner cavity of a box body of the experimental mechanism is divided into a left sealing cavity and a right sealing cavity by a rotary piston with a sealing ring sleeved on the periphery, the rotary piston is fixedly connected to one end of a central rotary shaft, the other end of the central rotary shaft is supported by a bearing assembly assembled on the right side wall of the box body and is respectively connected with a torque rotating speed sensor and a hydraulic motor which are fixed on a machine base on the same axis through a coupler, the hydraulic motor controls the reversing and rotating speed of the rotary piston, and the torque rotating speed sensor reads the rotating speed and the torque output by the hydraulic motor; the impeller arranged in the left sealing cavity is connected with one end of a transmission shaft supported by the left side wall of the box body, and the other end of the transmission shaft is connected with the driving shaft of the stirring motor on the same axis through a coupler; the left and right charging hoppers of the charging mechanism are respectively fixed above the left and right sealing cavity feed inlets of the box body, and the left and right high-pressure connectors of the pressurizing mechanism are respectively communicated with the left and right sealing cavities through high-pressure oil pipes.
The experimental mechanism comprises a box body, an impeller driven by a stirring motor and assembled in the box body, a rotary piston with a sealing ring, a central rotating shaft, a torque rotating speed sensor, a hydraulic motor and a related coupling, wherein the rotary piston is divided into a left sealing cavity and a right sealing cavity by the rotary piston.
The charging mechanism comprises a left charging hopper with a left ball valve switch and a right charging hopper with a right ball valve switch, wherein the left charging hopper is communicated with a fluid medium charging box.
The pressurizing mechanism comprises a left high-pressure joint and a right high-pressure joint which are communicated with the hydraulic oil cylinder.
The reversing mechanism consists of a second motor, a reversing valve controlled by the second motor and a second hydraulic valve block with a pressure reducing valve.
The invention has the advantages and positive effects that: the inner cavity of the box body of the experimental mechanism is divided into a left sealing cavity and a right sealing cavity by utilizing a rotary piston with a sealing ring sleeved on the periphery, after an impeller arranged in the left sealing cavity is stirred, liquid medium is uniformly distributed and fixedly connected with a central rotating shaft of the rotary piston, the central rotating shaft is respectively connected with a torque rotating speed sensor and a hydraulic motor which are fixed on a machine base through a coupler on the same axis, the hydraulic motor controls the reversing and rotating speed of the rotary piston, and the torque rotating speed sensor reads the rotating speed and the torque output by the hydraulic motor; the left and right high-pressure connectors of the pressurizing mechanism, which are respectively communicated with the left and right sealing cavities through the high-pressure oil pipe, are utilized, the left and right charging hoppers of the charging mechanism, which are respectively fixed above the feeding ports of the left and right sealing cavities of the box body, can be used for respectively loading pressure intensity and adding fluid media such as water, lubricating oil, lubricating grease, silt and the like in the left and right sealing cavities, so that the device has reasonable structural design, can accurately simulate on-site working conditions, is uniform in loading, is convenient to adjust and is easy to operate. The left sealing cavity and the right sealing cavity have wide pressure application range, can be pressurized independently, have higher precision of change, can relatively accurately analyze the change condition of the stress pressure of the sealing ring under complex working conditions, and completely meet the sealing performance requirements under the conditions of different fluid pressures, different rotating speeds and different working media. The center rotating shaft fixedly connected with the rotating piston can be positively and reversely reversed, the rotating speed and the torque can be adjusted, friction and wear tests of the sealing ring under static sealing conditions and under extrusion and shearing of different fluid pressures and different fluid media can be realized, the sealing performance of the sealing ring in dynamic sealing of the sealing ring under the conditions of different fluid pressures, different rotating speeds and different fluid media can be detected, and service life calculation can be carried out according to the wear amount of the sealing ring.
In conclusion, the sealing performance research method solves the problems that the existing sealing test device can not simulate the sealing performance research of the rubber sealing ring under the complex working condition.
Experiments prove that the adjustable range of the fluid pressure applied by the sealing test device is as follows: the adjustable range of the rotating speed of the central shaft is 0 MPa-3 MPa: the adjustable range of the torque is-500 N.m, and 0-300 r/min.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of a construction of the present invention;
FIG. 2 is a top view of FIG. 1;
FIG. 3 is an electrical schematic of the present invention;
fig. 4 is a control structure diagram of the hydraulic system of the present invention.
The serial numbers in the figures illustrate: the hydraulic oil pump comprises a base 1, a sealing ring 2, an impeller 3, a left oil discharge port 4, a left sealing cavity 5, a stirring motor 6, a left high-pressure joint 7, a left ball valve switch 8, a right ball valve switch 9, a rotary piston 10, a right sealing cavity 11, a right high-pressure joint 12, a torque rotating speed sensor 13, a hydraulic motor 14, a central rotating shaft 15, a right oil discharge port 16, a left charging hopper 17, a right charging hopper 18, a second pressure sensor 19, a first pressure sensor 20, an industrial personal computer 21, a seventh reversing valve 22, a sixth reversing valve 23, a fifth reversing valve 24, a fourth reversing valve 25, a third reversing valve 26, a second reversing valve 27, a first reversing valve 28, a collecting module 29, a second digital module 30, a first digital module 31, a sub-32, a first motor 33, a second motor 34, a first hydraulic valve block 35, a pressure reducing valve 36, a second hydraulic valve block 37 and a hydraulic oil cylinder 38.
Detailed Description
The experimental device for detecting the sealing performance by pressing in a cavity comprises a machine base 1, an experimental mechanism assembled on the machine base 1, a reversing mechanism, a feeding mechanism, a pressing mechanism, a power mechanism, an electric control mechanism and the like. The experimental mechanism comprises a box body, an impeller 3 driven by a stirring motor 6 assembled in the box body, a rotary piston 10 with a sealing ring 2, a central rotating shaft 15, a torque rotating speed sensor 13, a hydraulic motor 14 and a related coupling, a left sealing cavity 5, a right sealing cavity 11 and the like which are separated by the rotary piston 10. The box body of the experimental mechanism adopts a split structure, and the bottom of the box body is provided with a left oil discharge port 4 and a right oil discharge port 16, so that fluid media in the box body are easier to clean, and the box body is convenient to use in next test. The inner cavity of the box body is divided into a left sealing cavity 5 and a right sealing cavity 11 by a rotary piston 10 with a sealing ring 2 sleeved on the periphery. The rotary piston 10 is fixedly connected to one end of a central rotary shaft 15, and the other end of the central rotary shaft 15 is supported by a bearing assembly assembled on the right side wall of the box body and is respectively connected to a torque rotation speed sensor 13 and a hydraulic motor 14 fixed on the machine base 1 on the same axis through a coupler. The hydraulic motor 14 controls the reversing and rotational speed of the rotary piston 10, and the torque rotational speed sensor 13 reads the rotational speed and torque output from the hydraulic motor 14.
The charging mechanism comprises a left charging hopper 17 with a left ball valve switch 8 and a right charging hopper 18 with a right ball valve switch 9, which are communicated with a fluid medium tank filled with water, lubricating oil, lubricating grease, sediment and the like. The left and right charging hoppers 17 and 18 are respectively fixed above the feed inlets of the left and right sealing cavities 5 and 11 of the box body, and fluid media such as water, lubricating oil, lubricating grease, silt and the like can be added into the left and right sealing cavities 5 and 11.
The pressurizing mechanism includes a left high-pressure joint 7 and a right high-pressure joint 12 which are communicated with a hydraulic cylinder 38. The left high-pressure connector 7 is communicated with the left sealing cavity 5 through a high-pressure oil pipe, and the right high-pressure connector 12 is connected with the right sealing cavity 11 through a high-pressure oil pipe to input fluid pressure into the left sealing cavity 5 and the right sealing cavity 11.
The surface contact friction pair of the experimental mechanism, which is formed by the sealing ring 2, the rotary piston 10 and the inner wall of the box body, enables the sealing ring 2 to generate contact stress and initial compression ratio. The rotary piston 10 connected to the central rotary shaft 15 is convenient to assemble, disassemble and replace, and the specification of the sealing ring 2 can be selected according to actual needs, so that the rotary piston 10 with different sizes can be replaced at any time to perform experiments, and the requirement of accurately simulating the field working condition is met. The impeller 3 arranged in the left sealing cavity 5 is connected with one end of a transmission shaft supported by the left side wall of the box body, the other end of the transmission shaft is connected with a driving shaft of the stirring motor 6 on the same axis through a coupler, and the stirring motor 6 is supported by a motor connecting flange fixed on the left sealing box body; the impeller 3 is connected with the stirring motor 6, and the stirring motor 6 drives the impeller 3 to rotate, so that fluid media are uniformly distributed in the left seal cavity 5, and loading is more in accordance with actual working conditions. The hydraulic motor 14 controls the forward and reverse rotation direction and the rotation speed of the rotary piston 10, and the torque rotation speed sensor 13 reads the rotation speed and the torque output from the hydraulic motor 14.
The power mechanism includes a first motor 33, a first hydraulic valve block 35. The output end of the first motor 33 is connected with the hydraulic motor 14 by using a first hydraulic valve block 35, so as to control the maximum output oil pressure of the hydraulic motor 14 and further control the maximum output rotating speed and torque of the hydraulic motor 14.
The reversing mechanism is composed of a second motor 34, a first reversing valve 28, a second reversing valve 27, a third reversing valve 26, a fourth reversing valve 25, a fifth reversing valve 24, a sixth reversing valve 23, a seventh reversing valve 22, a second hydraulic valve block 37 with a pressure reducing valve 36 and the like which are controlled by the second motor. The second motor 34 controls the opening and closing of the reversing valves, the first reversing valve 28 controls the opening and closing of the hydraulic motor 14, and the second reversing valve 27 and the third reversing valve 26 control the forward and reverse reversing of the hydraulic motor 14. The fourth reversing valve 25 and the fifth reversing valve 24 control the pressurizing mechanism to adjust the pressure of the right sealing cavity 11, the sixth reversing valve 23 and the seventh reversing valve 22 control the pressurizing mechanism to adjust the pressure of the left sealing cavity 5, and the pressure amplitude of the pressurizing mechanism is controlled by the pressure reducing valve 36 on the second hydraulic valve block 37. When two reversing valves controlling the opening and closing of the same hydraulic element are simultaneously opened, the program defaults to be invalid, and the experimental device is protected.
The electric control mechanism mainly comprises an industrial personal computer 21, an Adam module 32, an acquisition module 29, a first digital quantity module 31, a second digital quantity module 30, a torque rotation speed sensor 13, a first pressure sensor 20 and a second pressure sensor 19 to form a control loop. The above modules of the electric control mechanism read the rotational speed and torque values in the torque rotational speed sensor 13 and the pressure values measured by the pressure sensors, and display experimental data on the industrial personal computer 21. The specific control process is as follows: the adam module 32 is connected with the industrial personal computer 21, and reads the experimental values obtained by the other three modules. The first digital quantity module 31 is connected with the first motor 33, the second motor 34, the first reversing valve 28, the second reversing valve 27, the third reversing valve 26, the fourth reversing valve 25 and the fifth reversing valve 24 to form a control loop, the forward and reverse reversing of the first motor 33 and the opening and closing of the second motor 34 are controlled, the opening and closing of the reversing valves are controlled, the second digital quantity module 30 is controlled to be started by controlling the stirring motor 6, and the sixth reversing valve 23 and the seventh reversing valve 22 are opened and closed. The acquisition module 29 reads the rotational speed and torque values in the torque rotational speed sensor 13 and the pressure values measured by the first pressure sensor 20 and the second pressure sensor 19, and displays experimental data on the industrial personal computer 21.
The upper end of the torque rotation speed sensor 13 is connected with a torque rotation speed signal converter of the electric control mechanism, the controllable range of the rotation speed is 0-300 r/min, and the controllable range of the torque is-500 N.m.
The range of the applied fluid pressure is 0-3 MPa, and the precision is 0.01MPa.
The working process of the experiment machine is as follows: firstly, the box body is disassembled, the sealing ring 2 is sleeved in the peripheral groove of the rotary piston 10, and the box body is divided into a left sealing cavity 5 and a right sealing cavity 11. The seal ring 2 forms a surface contact friction pair with the rotary piston 10 and the inner wall of the box body, so that the seal ring 2 generates initial compression ratio and generates contact stress at the contact surface. The left ball valve switch 8 and the right ball valve switch 9 of the charging mechanism are opened, water and sand are added from the left charging hopper 17, and lubricating oil or lubricating grease is added from the right charging hopper 18. The pressurizing mechanism is opened, smaller pressure is applied, the pressurizing mechanism runs for a plurality of times, no gas exists in the left sealing cavity 5 and the right sealing cavity 11, and the left ball valve switch 8 and the right ball valve switch 9 of the feeding mechanism are closed. The stirring motor 6 is started to drive the impeller 3 to rotate, so that the mixed fluid medium is stirred, the liquid medium is uniformly distributed, and the actual working condition of the slurry shield machine is simulated more truly. The pressurizing mechanism is opened to apply fluid pressure in the left and right sealing cavities 5 and 11, the pressure reducing valve 36 in the second hydraulic valve block 37 is adjusted to change the applied pressure, the first motor 33 of the power mechanism is opened when the pressure reading in the electric control mechanism is stable, the reversing mechanism controls the hydraulic motor 14 to drive the central rotating shaft 15 to reverse in forward and reverse directions, the rotary piston 10 is driven to rotate accordingly, and the rotating speed and the torque are adjusted. The changes of the pressure, the revolution and the torque displayed by the industrial personal computer 21 are observed, if the pressure value is greatly different from the previous stable value, or the pressure values in the left sealing cavity 5 and the right sealing cavity 11 tend to be equal, the leakage of the sealing ring 2 is proved, otherwise, the experiment is continued according to the preset experimental scheme. When the experiment is finished, the pressurizing device is closed, the experiment device is closed, the left oil discharging port 4 of the left sealing cavity 5 and the right oil discharging port 16 of the right sealing cavity 11 are opened, and working media are cleaned.
Claims (4)
1. The utility model provides a divide chamber to exert pressure and detect sealing performance's experimental apparatus, includes frame, assembles experimental mechanism, reversing mechanism, charging mechanism, the pressurizing mechanism on the frame, power unit, automatically controlled mechanism, its characterized in that: the inner cavity of a box body of the experimental mechanism is divided into a left sealing cavity and a right sealing cavity by a rotary piston with a sealing ring sleeved on the periphery, the rotary piston is fixedly connected to one end of a central rotary shaft, the other end of the central rotary shaft is supported by a bearing assembly assembled on the right side wall of the box body and is respectively connected with a torque rotating speed sensor and a hydraulic motor which are fixed on a machine base on the same axis through a coupler, the hydraulic motor controls the reversing and rotating speed of the rotary piston, and the torque rotating speed sensor reads the rotating speed and the torque output by the hydraulic motor; the impeller arranged in the left sealing cavity is connected with one end of a transmission shaft supported by the left side wall of the box body, and the other end of the transmission shaft is connected with the driving shaft of the stirring motor on the same axis through a coupler; the left and right charging hoppers of the charging mechanism are respectively fixed above the charging openings of the left and right sealing cavities of the box body, and the left and right high-pressure connectors of the pressurizing mechanism are respectively communicated with the left and right sealing cavities through high-pressure oil pipes; the power mechanism comprises a first motor and a first hydraulic valve block; the output end of the first motor is connected with the hydraulic motor by utilizing a first hydraulic valve block, so as to control the maximum output oil pressure of the hydraulic motor and further control the maximum output rotating speed and torque of the hydraulic motor; the electric control mechanism mainly comprises an industrial personal computer, an Adam module, an acquisition module, a first digital quantity module, a second digital quantity module, a torque rotation speed sensor, a first pressure sensor and a second pressure sensor; the module of the electric control mechanism reads the rotation speed and the torque values in the torque rotation speed sensor and the pressure values measured by the pressure sensors, and experimental data are displayed on the industrial personal computer.
2. The experimental device for detecting sealing performance by cavity pressurization according to claim 1, wherein: the charging mechanism comprises a left charging hopper with a left ball valve switch and a right charging hopper with a right ball valve switch, wherein the left charging hopper is communicated with a fluid medium charging box.
3. The experimental device for detecting sealing performance by cavity pressurization according to claim 1, wherein: the pressurizing mechanism comprises a left high-pressure joint and a right high-pressure joint which are communicated with the hydraulic oil cylinder.
4. The experimental device for detecting sealing performance by cavity pressurization according to claim 1, wherein: the reversing mechanism consists of a second motor, a reversing valve controlled by the second motor and a second hydraulic valve block with a pressure reducing valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910027273.8A CN109632288B (en) | 2019-01-11 | 2019-01-11 | Experimental device for divide chamber to exert pressure and detect sealing performance |
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| CN201910027273.8A CN109632288B (en) | 2019-01-11 | 2019-01-11 | Experimental device for divide chamber to exert pressure and detect sealing performance |
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| CN109632288A CN109632288A (en) | 2019-04-16 |
| CN109632288B true CN109632288B (en) | 2024-02-27 |
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| CN110186625A (en) * | 2019-06-21 | 2019-08-30 | 中铁工程服务有限公司 | Center steering body medium channel sealing property detection device |
| CN110608878B (en) * | 2019-10-18 | 2021-03-23 | 湖南科技大学 | Detection apparatus for simulation deep sea environment rotary motion sealing washer sealing performance |
| CN114136609B (en) * | 2021-11-29 | 2024-04-05 | 重庆川仪调节阀有限公司 | Gasket inner and outer sealing performance detection method |
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