CN110031156B - A method for using a double-end sealed dynamic operation test bench - Google Patents
A method for using a double-end sealed dynamic operation test bench Download PDFInfo
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- CN110031156B CN110031156B CN201910358918.6A CN201910358918A CN110031156B CN 110031156 B CN110031156 B CN 110031156B CN 201910358918 A CN201910358918 A CN 201910358918A CN 110031156 B CN110031156 B CN 110031156B
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- 238000012360 testing method Methods 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000007789 sealing Methods 0.000 claims abstract description 84
- 239000003921 oil Substances 0.000 claims description 24
- 239000010687 lubricating oil Substances 0.000 claims description 17
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims 2
- 238000009434 installation Methods 0.000 abstract description 3
- 230000008093 supporting effect Effects 0.000 description 6
- 238000001514 detection method Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010998 test method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
本发明公开了一种双端密封动态运转试验台，包括第一主轴、电机、第二主轴以及底座组成。本申请模拟了现场机泵的结构，相当于一种双支撑泵，两侧对称，在电机两侧各形成一个密封腔体，在两侧密封腔体里各装一套密封，通过电机带动密封旋转，并在密封腔体里产生压力，根据压力的变化判断密封是否存在泄漏，通过动态试验来有效地检验密封的使用性能。还公开了一种双端密封动态运转试验台的使用方法，对不同轴径的密封进行动态试验，具有安装灵活和通用性强的特点。
The present invention discloses a double-end seal dynamic operation test bench, which includes a first main shaft, a motor, a second main shaft and a base. The present application simulates the structure of an on-site machine pump, which is equivalent to a double-support pump, symmetrical on both sides, and forms a sealing cavity on each side of the motor. A set of seals is installed in each sealing cavity on both sides. The seal is driven to rotate by the motor, and pressure is generated in the sealing cavity. Whether the seal has leakage is determined based on the change in pressure, and the performance of the seal is effectively tested through dynamic tests. A method for using a double-end seal dynamic operation test bench is also disclosed, which performs dynamic tests on seals of different shaft diameters, and has the characteristics of flexible installation and strong versatility.
Description
Technical Field
The invention relates to the field of dynamic operation tests of mechanical seals, in particular to a double-end sealing dynamic operation test bed and a double-end sealing dynamic operation test method.
Background
The mechanical seal is operated along with the long period of the machine pump, and sealing leakage is frequently caused, so that leakage point detection is a very important work. The sealing performance of the mechanical seal is tested by two methods, namely a static leakage point test and a dynamic leakage point test, wherein the static leakage point test is suitable for leakage detection of a pump in a static state, is suitable for the mechanical seal with obvious leakage points and large leakage quantity, but is not obvious for the seal with the leakage points which are not obvious and are not easy to be checked, and the test effect of the static leakage point test is not obvious. The dynamic leakage point test is used for leakage detection of the running machine pump, and the leakage detection effect is relatively obvious, but the test wastes sealing liquid and influences the running working condition of the machine pump. The mechanical seal operation test bed in the prior art simulates the operation condition of the mechanical seal in the pump, and well solves the problems. However, one end of the motor only drives the mechanical seal to test, the balance of the motor with the mechanical seal is poor, the operation condition of the mechanical seal in the pump can not be well simulated, and the working efficiency is low.
Disclosure of Invention
In order to better simulate the operation condition of the mechanical seal in the pump and improve the service performance of the mechanical seal and the working efficiency of the test bed, the invention provides a double-end seal dynamic operation test bed and a double-end seal dynamic operation test method, which are used for effectively testing the sealing performance of the mechanical seal.
In order to achieve the above purpose, the invention is realized by the following technical scheme:
A double-end sealing dynamic operation test bed comprises a first main shaft, a motor, a second main shaft and a base. The two ends of the motor are respectively connected with the first main shaft and the second main shaft, and the bottom of the motor is connected with the base. One end of motor is provided with first internal flange, and the one end of first internal flange is connected with the one end of motor, and the other end of first internal flange is provided with first support, and the one end of first support is connected with the other end of first internal flange, and the other end of first support is provided with first outer flange, and the one end of first outer flange is connected with the other end of first support, and the other end of first outer flange is provided with first end cover, and first end cover is connected with the other end of first outer flange.
The other end of motor is provided with second internal flange, and the one end of second internal flange is connected with the one end of motor, and the other end of second internal flange is provided with the second support, and the one end of second support is connected with the other end of second internal flange, and the other end of second support is provided with the second outward flange, and the one end of second outward flange is connected with the other end of second support, and the other end of second outward flange is provided with the second end cover, and the second end cover is connected with the other end of second outward flange.
Compared with the prior art, the invention has the following advantages:
The application simulates the structure of a field machine pump, which is equivalent to a double-support pump, two sides of the pump are symmetrical, a sealing cavity is respectively formed at two sides of the motor, a set of sealing is respectively arranged in the sealing cavities at two sides, the motor drives the sealing to rotate, pressure is generated in the sealing cavities, whether the sealing has leakage or not is judged according to the change of the pressure, and the service performance of the sealing is effectively checked through a dynamic test.
It is further preferred that the first spindle is provided with a first bushing, which is connected to the first spindle. The second spindle is provided with a second sleeve, and the second sleeve is connected with the second spindle.
By adopting the technical scheme, the double-support pump is equivalent to a double-support pump, and two sets of seals can be simultaneously installed on two shaft sleeves to test the sealing performance of the double-support pump.
It is further preferable that the first sleeve and the second sleeve are both reducing sleeves.
By adopting the technical scheme, the sealing device can be used for installing the sealing with different shaft diameters, checking the sealing with different shaft diameters, and is flexible to install and high in universality.
It is further preferable that the bottom of the first support is provided with a first support, the upper end of the first support is welded with the bottom of the first support, and the lower end of the first support is connected with the base.
By adopting the technical scheme, the first support is supported by the first support, and the first support is rigidly connected with the base, so that the purpose of supporting the whole test bed is achieved.
It is further preferred that the first leg is made of steel 45.
By adopting the technical scheme, the 45 # steel has strong comprehensive mechanical property, higher strength and strong bearing capacity of the first support column made of the 45 # steel, and has good supporting effect on the test bed.
It is further preferable that a second support is provided at the bottom of the second support, the upper end of the second support is welded to the bottom of the second support, and the lower end of the second support is connected to the base.
By adopting the technical scheme, the second support is supported by the second support, and the second support is rigidly connected with the base, so that the aim of supporting the whole test bed is fulfilled.
It is further preferred that the second leg is made of steel 45.
By adopting the technical scheme, the 45 # steel has strong comprehensive mechanical property, higher strength and strong bearing capacity of the first support column made of the 45 # steel, and has good supporting effect on the test bed.
The application method of the double-end sealing dynamic operation test stand is characterized by comprising the following steps of:
and 1, removing the first end cover, the first outer flange and the first bracket.
And 2, installing the first shaft sleeve and the sealing element.
And 3, refitting the first bracket, the first outer flange and the first end cover.
And 4, detaching the second end cover, the second outer flange and the second bracket.
And 5. A second sleeve and a sealing element.
And 6, refitting the second bracket, the second outer flange and the second end cover.
And 7, starting the motor to start working, and enabling the sealing element to generate pressure along with the operation of the first main shaft and the second main shaft.
And 8, checking the sealing performance of the sealing element according to the change of the pressure.
By adopting the technical scheme, the sealing performance of the mechanical seal is effectively tested, and the dynamic test is carried out on the seal with different shaft diameters by replacing the shaft sleeve, so that the mechanical seal has the characteristics of flexible installation and strong universality.
Drawings
FIG. 1 is a schematic view of the present embodiment;
FIG. 2 is a schematic diagram of the present embodiment;
FIG. 3 is a schematic view of the present embodiment with seals installed;
In the drawing, a first main shaft, a 2-motor, a 3-second main shaft, a 4-first pressure gauge, a 5-second pressure gauge, a 6-first support, a 7-second support, an 8-first shaft sleeve, a 9-second shaft sleeve, a 10-base, an 11-motor support, a 12-first outer flange, a 13-second outer flange, a 14-first inner flange, a 15-second inner flange, a 16-first end cover, a 17-second end cover, a 18-first sealing cavity, a 19-second sealing cavity, a 20-motor rotating shaft, a 21-first baffle plate, a 22-second baffle plate, a 60-first support, a 70-second support, a 100-first sealing element, a 101-second sealing element, a 200-first oil inlet pipe, a 201-first oil outlet pipe, a 300-second oil inlet pipe and a 301-second oil outlet pipe.
Detailed Description
The present invention is described in further detail below with reference to fig. 1,2 and 3.
As shown in fig. 1 and 2, a double-end sealed dynamic operation test stand is composed of a first main shaft 1, a motor 2, a second main shaft 3 and a base 10. The motor 2 is provided with a motor rotating shaft 20, the motor rotating shaft 20 is detachably connected with the motor 2, and two ends of the motor rotating shaft 20 are respectively connected with the first main shaft 1 and the second main shaft 3. The bottom of motor 2 is provided with motor support 11, and motor support 11's upper end and motor 2's bottom welding, motor support 11's lower extreme passes through bolted connection with base 10.
One end of the motor 2 is provided with a first inner flange 14, one end of the first inner flange 14 is connected with one end of the motor 2 through bolts, the other end of the first inner flange 14 is provided with a first bracket 6, and one end of the first bracket 6 is connected with the other end of the first inner flange 14 through bolts. The other end of the first bracket 6 is provided with a first outer flange 12, one end of the first outer flange 12 is connected with the other end of the first bracket 6 through bolts, the other end of the first outer flange 12 is provided with a first end cover 16, and the first end cover 16 is connected with the other end of the first outer flange 12 through bolts. The first end cap 16 forms a first sealed cavity 18 with the first outer flange 12, the first bracket 6, and the first inner flange 14.
The top of the first end cover 16 is provided with a first pressure gauge 4, and the first pressure gauge 4 is connected with the top of the first end cover 16 through a nut. A first oil inlet pipe 200 is arranged at the bottom end of the first end cover 16, and the first oil inlet pipe 200 is externally connected with a lubricating oil inlet pipe which is an existing standard component.
As shown in fig. 3, a first oil outlet pipe 201 is provided at the top of the first bracket 6, and the first oil outlet pipe 201 is externally connected with a lubricating oil outlet pipe, which is an existing standard component. The bottom of the first bracket 6 is provided with a first support 60, the upper end of the first support 60 is welded with the bottom of the first bracket 6, the lower end of the first support 60 is connected with the base 10 through bolts, and the first support 60 plays a role of the first bracket 6 and a sealing member. In order to support the relatively heavy test tower and seal members, the first support column 60 is made of 45 # steel, has good comprehensive mechanical properties, has relatively high strength, and can better play a supporting role.
The seals include a first seal 100 and a second seal 101.
In the first sealed cavity 18, one end of the motor rotating shaft 20 is provided with a first spindle 1, and one end of the first spindle 1 is detachably connected with one end of the motor rotating shaft 20. The other end of the first main shaft 1 is provided with a first baffle 21, the first baffle 21 is connected with the other end of the first main shaft 1 through bolts, the first main shaft 1 is provided with a first shaft sleeve 8, and the first shaft sleeve 8 is in key connection with the first main shaft 1. Referring to fig. 3, a first sealing member 100 is provided on the first shaft sleeve 8, and the first sealing member 100 is detachably linked with the first shaft sleeve 8.
The other end of motor 2 is provided with second internal flange 15, the one end of second internal flange 15 passes through bolted connection with the one end of motor 2, the other end of second internal flange 15 is provided with second support 7, bolted connection is passed through with the other end of second internal flange 15 to the one end of second support 7, the other end of second support 7 is provided with second external flange 13, bolted connection is passed through with the other end of second support 7 to the one end of second external flange 13, the other end of second external flange 13 is provided with second end cover 17, bolted connection is passed through with the other end of second external flange 13 to second end cover 17. The second end cap 17 forms a second sealed cavity 19 with the second outer flange 13, the second bracket 7 and the second inner flange 15.
The top of second end cover 17 is provided with second manometer 5, and second manometer 5 passes through the nut with the top of second end cover 17 and connects. The bottom of the second end cover 17 is provided with a second oil inlet pipe 300, and the second oil inlet pipe 300 is externally connected with a lubricating oil inlet pipe which is an existing standard component.
As shown in fig. 3, a second oil outlet pipe 301 is provided at the top of the second bracket 7, and the second oil outlet pipe 301 is externally connected with a lubricating oil outlet pipe, which is an existing standard component. The bottom of the second support 7 is provided with a second support column 70, the upper end of the second support column 70 is welded with the bottom of the second support 7, the lower end of the second support column 70 is connected with the base 10 through bolts, and the second support column 70 plays a role of the second support 7 and a sealing element. In order to support the heavier test tower and sealing elements, the second support column 70 is made of 45 # steel, has good comprehensive mechanical properties and higher strength, and can better play a supporting role.
In the second sealed cavity 19, the other end of the motor rotating shaft 20 is provided with a second main shaft 3, one end of the second main shaft 3 is detachably connected with the other end of the motor rotating shaft 20, the other end of the second main shaft 3 is provided with a second baffle 22, the second baffle 22 is connected with the other end of the second main shaft 3 through a bolt, the second main shaft 3 is provided with a second shaft sleeve 9, and the second shaft sleeve 9 is in key connection with the second main shaft 3. Referring to fig. 3, the second sleeve 9 is provided with a second sealing member 101, and the second sealing member 101 is detachably connected to the second sleeve 9.
The two ends of the motor rotating shaft 20 can be simultaneously connected with the first main shaft 1 and the second main shaft 3 with different shaft diameters within ¢ (including ¢) so that the dynamic test can be carried out on the sealing with different shaft diameters within ¢ shaft diameters, the installation is flexible, the universality is strong, and the application range is wide.
The principle of the test is that lubricating oil is injected from the first oil inlet pipe 200 and the second oil inlet pipe 300 respectively, so that the first sealing cavity 18 and the second sealing cavity 19 are filled with the lubricating oil, and the sealed friction pair is lubricated. Starting the motor 2, the motor rotating shaft 20 rotates at a high speed, the motor rotating shaft 20 drives the first main shaft 1 and the second main shaft 3 to rotate simultaneously, the first shaft sleeve 8 rotates along with the first main shaft 1, the first sealing element 100 rotates along with the first main shaft 1 to generate centrifugal force, pressure is formed in the centrifugal force first sealing cavity 18, a pressure value is displayed by the first pressure gauge 4, if the pressure value is stable within a certain range, the first sealing element 100 has no leakage point, the sealing performance is good, if the pressure value fluctuates greatly or even drops quickly, the first sealing element 100 has leakage points, and the sealing performance is poor. Meanwhile, the second sleeve 9 rotates along with the second main shaft 3, the second sealing element 100 rotates along with the second main shaft 3 to generate centrifugal force, pressure is formed in the second sealing cavity 19 due to the centrifugal force, a pressure value is displayed by the second pressure gauge 5, if the pressure value is stable within a certain range, no leakage point exists in the second sealing element 101, the sealing performance is good, and if the pressure value fluctuates greatly or even drops quickly, the leakage point exists in the second sealing element 101, and the sealing performance is poor.
A method of using a double-ended seal dynamic operation test stand, referring to fig. 1 and 2, comprising the steps of:
Step 1, loosening bolts, and sequentially removing the first end cover 16, the first outer flange 12 and the first bracket 6.
Step 2, selecting a first shaft sleeve 8 corresponding to the shaft diameter of the first sealing element 100, mounting the first shaft sleeve 8 on the first main shaft 1, mounting the first sealing element 100 on the first shaft sleeve 8, and fixing by bolts.
And 3, returning the first bracket 6, connecting one end of the first bracket 6 with the other end of the first inner flange 14 through bolts, and connecting the lower end of the first bracket 6 with the base 10.
And 4, refitting the first outer flange 12, and connecting one end of the first outer flange 12 with the other end of the first bracket 6 through bolts.
And 5, refitting the first end cover 16, and bolting the first end cover 16 and the other end of the first outer flange 12.
And 6, loosening bolts, and sequentially removing the second end cover 17, the second outer flange 13 and the second bracket 7.
And 7, selecting a second sleeve 9 corresponding to the shaft diameter of the second sealing element 101, mounting the second sleeve 9 on the second main shaft 3, mounting the second sealing element 101 on the second sleeve 9, and fixing by bolts.
And 8, returning the second bracket 7, connecting one end of the second bracket 7 with the other end of the second inner flange 15 through bolts, and connecting the lower end of the second bracket 7 with the base 10.
And 9, back-installing the second outer flange 13, and connecting one end of the second outer flange 13 with the other end of the second bracket 7 through bolts.
And 10, the second end cover 17 is assembled back, and the second end cover 17 is connected with the other end of the second outer flange 13 through bolts.
Step 11. Lubricating oil is injected into the first oil inlet pipe 200 and the second oil inlet pipe 300, respectively.
Step 12, the motor 2 is powered, the motor 2 starts to work, the motor rotating shaft 20 runs, one end of the motor rotating shaft 20 drives the first main shaft 1 to run, the first main shaft 1 rotates to drive the first shaft sleeve 8 to rotate, the first shaft sleeve 8 rotates to drive the first sealing element 100 to rotate, the first sealing element 100 rotates to generate centrifugal force and generate pressure in the first sealing cavity 18, and a specific pressure value is displayed by the first pressure gauge 4. The lubrication oil flows out from the first oil outlet pipe 201 to the lubrication oil outlet pipe.
And 13, driving the second spindle 3 to operate by the other end of the motor rotating shaft 20, driving the second sleeve 9 to rotate by the rotation of the second spindle 3, driving the second sealing element 101 to rotate by the rotation of the second sleeve 9, generating centrifugal force by the rotation of the second sealing element 101 and generating pressure in the second sealing cavity 19, wherein a specific pressure value is displayed by the second pressure gauge 5. The lubrication oil flows out from the second oil outlet pipe 301 to the lubrication oil outlet pipe.
Step 14. In the operation process, if the real-time pressure display values of the first pressure gauge 4 and the second pressure gauge 5 are stable and unchanged within a certain range, the lubricating oil is not introduced into the first sealing element 100 and the second sealing element 101, so that the first sealing element 100 and the second sealing element 101 are not leaked, and the sealing performance is good. If the real-time pressure display value of the first pressure gauge 4 is continuously reduced from a certain pressure value or the pressure of the first pressure gauge 4 is always at a lower value, the lubricating oil enters the first sealing member 100, so that the first sealing member 100 is judged to have leakage, and the sealing performance is poor. If the real-time pressure display value of the second pressure gauge 5 is continuously reduced from a certain pressure value or the pressure of the second pressure gauge 5 is always at a lower value, the lubricating oil enters the second sealing element 101, so that the second sealing element 101 is judged to have leakage, and the sealing performance is poor. The method can be used for testing the sealing performance of the sealing device, and the leakage condition of sealing of different diameters can be tested by replacing the shaft sleeve, so that the method is high in universality and achieves a multipurpose good effect.
The present embodiment is only for explanation of the present invention and is not to be construed as limiting the present invention, and modifications which do not creatively contribute to the present embodiment can be made by those skilled in the art after reading the present specification as required, but are protected by patent laws within the protection scope of the present invention.
Claims (5)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910358918.6A CN110031156B (en) | 2019-04-29 | 2019-04-29 | A method for using a double-end sealed dynamic operation test bench |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910358918.6A CN110031156B (en) | 2019-04-29 | 2019-04-29 | A method for using a double-end sealed dynamic operation test bench |
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| Publication Number | Publication Date |
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| CN110031156A CN110031156A (en) | 2019-07-19 |
| CN110031156B true CN110031156B (en) | 2025-01-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207418A (en) * | 2011-04-06 | 2011-10-05 | 北京化工大学 | Integrated test stand of high-speed high-pressure air seal for rotating shaft |
| CN107764488A (en) * | 2017-11-23 | 2018-03-06 | 南京林业大学 | Mechanical seal leakage method of testing and device |
| CN209802608U (en) * | 2019-04-29 | 2019-12-17 | 西安永华集团有限公司 | Double-end sealing dynamic operation test bed |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107505101B (en) * | 2017-09-15 | 2023-10-31 | 中铁工程装备集团盾构制造有限公司 | Main drive dynamic pressure maintaining tool of shield tunneling machine and test method thereof |
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2019
- 2019-04-29 CN CN201910358918.6A patent/CN110031156B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102207418A (en) * | 2011-04-06 | 2011-10-05 | 北京化工大学 | Integrated test stand of high-speed high-pressure air seal for rotating shaft |
| CN107764488A (en) * | 2017-11-23 | 2018-03-06 | 南京林业大学 | Mechanical seal leakage method of testing and device |
| CN209802608U (en) * | 2019-04-29 | 2019-12-17 | 西安永华集团有限公司 | Double-end sealing dynamic operation test bed |
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