CN111503276A - Ultrahigh pressure reciprocating sealing test device - Google Patents
Ultrahigh pressure reciprocating sealing test device Download PDFInfo
- Publication number
- CN111503276A CN111503276A CN202010493570.4A CN202010493570A CN111503276A CN 111503276 A CN111503276 A CN 111503276A CN 202010493570 A CN202010493570 A CN 202010493570A CN 111503276 A CN111503276 A CN 111503276A
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- Prior art keywords
- oil
- groups
- thick
- pressure
- oil collecting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/46—Sealings with packing ring expanded or pressed into place by fluid pressure, e.g. inflatable packings
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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
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
Abstract
The invention discloses an ultrahigh pressure reciprocating seal test device which comprises a thick-wall cylinder, an oil collecting end cover, a seal assembly, a reciprocating motion mechanism, a high-pressure oil injection system, a sensing system and an oil liquid collecting device, wherein the thick-wall cylinder is connected with the oil collecting end cover; the oil collecting end covers are arranged in two groups, and the two groups of oil collecting end covers are respectively installed at two ends of the thick-wall cylinder in a transition fit mode; the seal assembly is placed within a thick-walled cylinder; the high-pressure oil injection system is connected with the thick-wall cylinder; the reciprocating mechanism penetrates through the sealing component and the two groups of oil collecting end covers; the oil liquid collecting devices are provided with two groups and are respectively connected with the two groups of oil collecting end covers. According to the invention, the series of micro grooves are axially arranged on the inner surface of the elastic sleeve, when the elastic sleeve works, high-pressure oil liquid is filled in the micro grooves, the sealing surface of the elastic sleeve deforms under the action of internal and external pressure so as to realize sealing, and the elastic sleeve has elasticity, is convenient to disassemble and install and is convenient for test operation.
Description
Technical Field
The invention relates to the field of fluid ultrahigh pressure technology and mechanical engineering, in particular to an ultrahigh pressure reciprocating seal test device.
Background
The metal clearance sealing structure is simple, can work for a long time under severe working conditions as a dynamic seal, has important application in the fields of power engineering, oil exploitation and mechanical engineering, and is often applied to sealing of devices such as fuel injection systems, oil fracturing pumps and the like. Therefore, the research on the sealing performance of the metal clearance seal, particularly the research on the measurement of the friction force and the leakage amount, has great significance on the design of the high-performance metal clearance seal. Because the metal clearance sealing relates to the comprehensive sealing technology of multiple subjects such as materials science, mechanics, tribology, heat transfer science and the like, the measurement of physical quantities such as friction, leakage quantity and the like in a reciprocating sealing system has certain difficulty, and the measurement difficulty is higher under the working condition of high pressure or high temperature; at present, almost no ultrahigh pressure reciprocating sealing test device exists, and similar documents mainly include: the patent (application numbers: CN201510993184.0 and CN 201410639718.5) discloses two rubber ring high-pressure dynamic seal test devices, but the test devices mainly aim at gas seal and have limited working conditions of seal pressure; the patent (application number: CN 105738039A) discloses a measuring device and a measuring method for annular gap flow of a plunger-copper sleeve pair, but the invention only provides static flow measurement of the plunger-copper sleeve pair, and the maximum pressure of the test is 10 MPa. The test device provided by the invention is mainly used for measuring the dynamic sealing performance under the ultrahigh pressure working condition with the pressure working condition of more than 100 MPa.
Disclosure of Invention
The invention aims to provide an ultrahigh pressure reciprocating sealing test device to solve the technical problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: an ultrahigh pressure reciprocating seal test device comprises a thick-wall cylinder, an oil collecting end cover, a seal assembly, a reciprocating motion mechanism, a high-pressure oil injection system, a sensing system and an oil collecting device; the oil collecting end covers are arranged in two groups, the two groups of oil collecting end covers are respectively installed at two ends of the thick-wall cylinder in a transition fit mode and are fixedly fastened with the thick-wall sleeve through bolts, and oil collecting holes are formed in the oil collecting end covers; the seal assembly is placed within a thick-walled cylinder; the high-pressure oil injection system is connected with the thick-wall cylinder; the reciprocating mechanism penetrates through the sealing component and the two groups of oil collecting end covers; the oil liquid collecting devices are provided with two groups and are respectively connected with the two groups of oil collecting end covers; the sensing system comprises a pressure gauge, a tension and compression sensor and a speed sensor, the pressure gauge is connected with the high-pressure oil injection system, the tension and compression sensor is installed on the reciprocating mechanism, and the speed sensor is vertically placed on the outer side of the reciprocating mechanism.
And the oil collecting end cover is arranged between the oil collecting end cover and the thick-wall cylinder.
Furthermore, the oil collecting end cover comprises an inner boss, a matching surface and an outer boss, the inner boss is connected with the outer boss through the matching surface, bolt holes are symmetrically formed in the matching surface, the diameter of the inner ring of the outer boss is larger than that of the inner ring of the inner boss, the inner ring of the outer boss is in transition connection with the inner ring of the inner boss through a conical surface, an oil blocking platform is further arranged on the outer side of the inner ring of the outer boss, and the oil collecting hole is formed in the side face of the inner ring of the.
Further, the seal assembly comprises an elastic sleeve, a combined static seal and a supporting spring, the elastic sleeve is provided with two groups, the outer circular surfaces of the two groups of elastic sleeves are installed in a matched mode with the inner hole of the thick-wall cylinder, the top surfaces of the two groups of elastic sleeves are connected through the supporting spring, the bottom surfaces of the two groups of elastic sleeves press the oil collecting end cover, the combined static seal is provided with two groups, and the combined static seal is sleeved on the neck of the elastic sleeve respectively.
Further, the inner surface of the elastic sleeve is provided with a series of micro grooves along the axial direction.
Further, reciprocating motion mechanism includes plunger, connector, motor connecting rod and linear electric motor, the one end of plunger is connected with the motor connecting rod through the connector, and the other end and the linear electric motor of motor connecting rod are connected, and the other end of plunger passes two sets of oil collecting end covers, seal assembly.
Further, high pressure oiling system includes oiling interface, oiling pipe and high pressure oiling device, oiling pipe one end is connected with high pressure oiling device, and the oiling pipe other end is connected with the one end of oiling interface, and the other end of oiling interface is connected with the thick wall drum.
Furthermore, the oil liquid collecting device comprises an oil outlet guide pipe and an oil liquid collector, the oil outlet guide pipe and the oil liquid collector are respectively provided with two groups, one end of the oil outlet guide pipe is connected with an oil collecting hole of the oil collecting end cover, and the other end of the oil outlet guide pipe is connected with the oil liquid collector.
Furthermore, the sensing system also comprises a speed signal transmission line, a force signal transmission line and a data terminal, wherein the pull-press sensor transmits a signal to the input end of the data terminal through the force signal transmission line, and the speed sensor transmits a signal to the input end of the data terminal through the speed signal transmission line.
Compared with the prior art, the invention has the beneficial effects that: the inner surface of the elastic sleeve is provided with a series of micro grooves along the axial direction, the micro grooves are filled with high-pressure oil liquid during working, the sealing surface of the elastic sleeve deforms under the action of internal and external pressure so as to realize sealing, the elastic sleeve has elasticity, is convenient to detach and install and is convenient for test operation, a driving system in the prior art mostly adopts a crankshaft connecting rod type to convert rotary motion into reciprocating motion, and a linear motor is directly adopted to drive a plunger piston to reciprocate, so that the testing device is more compact and reliable.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
fig. 2 is a schematic structural diagram of an oil collecting end cover of the invention.
In the figure: 1. a thick-walled cylinder; 2. an oil collecting end cover; 2-1, conical surface; 2-2, oil collecting holes; 2-3, bolt holes; 2-4, matching surface; 2-5, an oil baffle table; 3. an elastic sleeve; 4. a combined static seal; 5. a support spring; 6. an oiling interface; 7. an oil injection conduit; 8. a high-pressure oil injection device; 9. a plunger; 10. a connector; 11. a tension and compression sensor; 12. a linear motor; 13. a speed sensor; 14. a data terminal; 15. a speed signal transmission line; 16. a force signal transmission line; 17. an oil collector; 18. an oil outlet conduit; 19. a high pressure oil chamber; 20. a sealing gasket; 21. a pressure gauge; 22. a motor connecting rod.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: an ultrahigh pressure reciprocating seal test device comprises a thick-wall cylinder 1, an oil collecting end cover 2, a seal assembly, a high-pressure oil injection system, a reciprocating motion mechanism, a sensing system and an oil liquid collecting device; the oil collecting end covers 2 are arranged in two groups, and the two groups of oil collecting end covers 2 are respectively installed at two ends of the thick-wall cylinder 1 in a transition fit mode; the seal assembly is placed inside a thick-walled cylinder 1; the high-pressure oil injection system is connected with the thick-wall cylinder 1; the reciprocating mechanism penetrates through the sealing component and the two groups of oil collecting end covers 2; the oil liquid collecting devices are provided with two groups and are respectively connected with the two groups of oil collecting end covers 2; the sensing system comprises a pressure gauge 21, a tension and compression sensor 11 and a speed sensor 13, the pressure gauge 21 is connected with the high-pressure oil injection system, the tension and compression sensor 11 is installed on the reciprocating mechanism, the speed sensor 13 is vertically placed on the outer side of the reciprocating mechanism, and meanwhile, a sealing gasket 20 is installed between the oil collecting end cover 2 and the thick-wall cylinder 1 to prevent oil from seeping out.
Referring to fig. 2, the oil collecting end cover 2 comprises an inner boss, a matching surface 2-4 and an outer boss, the inner boss is connected with the outer boss through the matching surface 2-4, bolt holes 2-3 are symmetrically formed in the matching surface 2-4, bolts penetrate through the bolt holes 2-3 and are fixedly connected with a thick-wall cylinder 1, the diameter of an inner ring of the outer boss is larger than that of an inner ring of the inner boss, the inner ring of the outer boss is in transitional connection with the inner ring of the inner boss through a conical surface 2-1, an oil blocking table 2-5 is further arranged on the outer side of the inner ring of the outer boss to prevent oil from leaking, and the oil collecting holes 2-2.
The sealing assembly comprises elastic sleeves 3, combined static seals 4 and supporting springs 5, the elastic sleeves 3 are divided into two groups, the outer circular surfaces of the two groups of elastic sleeves 3 are matched with the inner hole of the thick-wall cylinder 1, the top surfaces of the two groups of elastic sleeves 3 are connected through the supporting springs 5 to ensure that the bottom surfaces of the two groups of elastic sleeves 3 press the oil collecting end cover 2, the combined static seals 4 are divided into two groups, the combined static seals 4 are respectively sleeved at the neck parts of the elastic sleeves 3 to prevent oil from leaking from the gap between the outer circular surfaces of the elastic sleeves 3 and the inner hole of the thick-wall cylinder 1; a series of micro grooves are axially formed in the inner surface of the elastic sleeve 1, high-pressure oil liquid is filled in the micro grooves during working, and the sealing surface of the elastic sleeve deforms under the action of internal and external pressure so as to realize sealing.
The reciprocating mechanism comprises a plunger 9, a connector 10, a motor connecting rod 22 and a linear motor 12, one end of the plunger 9 is connected with the motor connecting rod 22 through the connector 10, the other end of the motor connecting rod 22 is connected with the linear motor 12, and the other end of the plunger 9 penetrates through two groups of oil collecting end covers 2 and a sealing assembly; the plunger 9, the elastic copper sleeve 3 and the thick-wall barrel 1 jointly form a high-pressure oil cavity 19, the plunger 9 is powered by the linear motor 12 to reciprocate, and the plunger 9 reciprocates relative to the elastic copper sleeve 3.
The high-pressure oil injection system comprises an oil injection connector 6, an oil injection guide pipe 7 and a high-pressure oil injection device 8, one end of the oil injection guide pipe 7 is connected with the high-pressure oil injection device 8, the other end of the oil injection guide pipe 7 is connected with one end of the oil injection connector 6, the other end of the oil injection connector 6 is connected with the thick-wall cylinder 1, the high-pressure oil injection device 8 can provide ultrahigh pressures with different pressure values, and oil is injected into the high-pressure oil cavity 19 through the oil injection guide pipe 7 and the oil injection connector 6.
The oil liquid collecting device comprises an oil outlet guide pipe 18 and an oil liquid collector 17, wherein the oil outlet guide pipe 18 and the oil liquid collector 17 are respectively provided with two groups, one end of the oil outlet guide pipe 18 is connected with an oil collecting hole 2-2 of the oil collecting end cover 2, the other end of the oil outlet guide pipe 18 is connected with the oil liquid collector 17, leaked oil liquid flows out of the oil collecting hole 2-2 and enters the oil liquid collector 17 through the oil outlet guide pipe 18, and therefore the measurement of leakage amount is completed.
The sensing system further comprises a speed signal transmission line 15, a force signal transmission line 16 and a data terminal 14, the pressure gauge 21 is installed on the outer side of the oil filling connector 6 in the high-pressure oil filling system, oil provided by the high-pressure oil filling device 8 enters the high-pressure oil cavity 19 through the oil filling guide pipe 7 and the oil filling connector 6, and the pressure gauge 21 monitors the oil in real time; the tension and compression sensor 11 is arranged on the connector 10, and the friction force between the plunger 9 and the elastic copper sleeve 3 is measured by the tension and compression sensor 11 and is transmitted to the data terminal 14 through the force signal transmission line 16; the speed sensor 15 is vertically arranged outside the motor connecting rod 22, and the reciprocating speed of the plunger 9 measured by the speed sensor 13 is transmitted to the data terminal 14 through the speed signal transmission line 15, so that the measurement of the friction force is completed.
The working principle is as follows: the high-pressure oil injection device 8 can provide a required pressure value, oil liquid provided is injected into a high-pressure oil cavity 19 through an oil injection guide pipe 7 and an oil injection port 6 and is monitored by a pressure gauge 21 in real time, a linear motor 12 provides power of reciprocating motion to drive a plunger 9 to do reciprocating motion relative to an elastic copper sleeve 3, a series of micro grooves are axially arranged on the inner surface of the elastic sleeve 3, the micro grooves are filled with the high-pressure oil liquid during working, a sealing surface of the elastic sleeve 3 deforms under the action of internal and external pressure to realize sealing, in the reciprocating motion process, the friction force between the plunger 9 and the elastic copper sleeve 3 is measured through a tension and compression sensor 11 on a connector 10, and the reciprocating speed of the plunger 9 is measured through a speed sensor 13 vertically arranged on the outer side of a motor connecting rod 22; the leaked oil flows out of the oil collecting hole 2-2 and enters the oil collector 17 through the oil outlet conduit 18, so that the measurement of the leakage amount is completed.
The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machinery, parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, and the details are not described, and the content not described in detail in the specification belongs to the prior art known by persons skilled in the art.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (9)
1. The utility model provides a reciprocal sealed test device of superhigh pressure which characterized in that: the oil-collecting device comprises a thick-wall cylinder (1), an oil-collecting end cover (2), a sealing assembly, a reciprocating mechanism, a high-pressure oil injection system, a sensing system and an oil collecting device; the oil collecting end covers (2) are divided into two groups, the two groups of oil collecting end covers (2) are respectively installed at two ends of the thick-wall cylinder (1) in a transition fit mode and are fixedly fastened with the thick-wall sleeve (1) through bolts, and oil collecting holes (2-2) are formed in the oil collecting end covers (2); the sealing assembly is placed inside a thick-walled cylinder (1); the high-pressure oil injection system is connected with the thick-wall cylinder (1); the reciprocating mechanism penetrates through the sealing component and the two groups of oil collecting end covers (2); the oil liquid collecting devices are provided with two groups and are respectively connected with the two groups of oil collecting end covers (2); the sensing system comprises a pressure gauge (21), a tension and compression sensor (11) and a speed sensor (13), the pressure gauge (21) is connected with the high-pressure oil injection system, the tension and compression sensor (11) is installed on the reciprocating mechanism, and the speed sensor (13) is vertically placed on the outer side of the reciprocating mechanism.
2. An ultrahigh pressure reciprocating seal testing device according to claim 1, characterized in that: the oil collecting device is characterized by further comprising two sealing gaskets (20), wherein the two sealing gaskets (20) are arranged between the oil collecting end cover (2) and the thick-wall cylinder (1).
3. An ultrahigh pressure reciprocating seal testing device according to claim 1, characterized in that: the oil collecting end cover (2) comprises an inner boss, a matching surface (2-4) and an outer boss, the inner boss is connected with the outer boss through the matching surface (2-4), bolt holes (2-3) are symmetrically formed in the matching surface (2-4), the diameter of an inner ring of the outer boss is larger than that of an inner ring of the inner boss, the inner ring of the outer boss is in transitional connection with the inner ring of the inner boss through a conical surface (2-1), an oil blocking table (2-5) is further arranged on the outer side of the inner ring of the outer boss, and the oil collecting holes (2-2) are formed in the side face of the inner ring of.
4. An ultrahigh pressure reciprocating seal testing device according to claim 1, characterized in that: the sealing assembly comprises an elastic sleeve (3), a combined static seal (4) and a supporting spring (5), the elastic sleeve (3) is provided with two groups, the outer circular surfaces of the two groups of elastic sleeves (3) are installed in a matched mode with the inner hole of the thick-wall cylinder (1), the top surfaces of the two groups of elastic sleeves (3) are connected through the supporting spring (5), the bottom surfaces of the two groups of elastic sleeves (3) tightly press the oil collecting end covers (2), the combined static seal (4) is provided with two groups, and the combined static seal (4) is respectively sleeved on the neck of the elastic sleeve (3).
5. An ultrahigh pressure reciprocating seal testing device according to claim 4, characterized in that: the inner surface of the elastic sleeve (3) is provided with a series of micro grooves along the axial direction.
6. An ultrahigh pressure reciprocating seal testing device according to claim 1, characterized in that: the reciprocating mechanism comprises a plunger (9), a connector (10), a motor connecting rod (22) and a linear motor (12), one end of the plunger (9) is connected with the motor connecting rod (22) through the connector (10), the other end of the motor connecting rod (22) is connected with the linear motor (12), and the other end of the plunger (9) penetrates through two sets of oil collecting end covers (2) and a sealing assembly.
7. An ultrahigh pressure reciprocating seal testing device according to claim 1, characterized in that: the high-pressure oil injection system comprises an oil injection interface (6), an oil injection guide pipe (7) and a high-pressure oil injection device (8), one end of the oil injection guide pipe (7) is connected with the high-pressure oil injection device (8), the other end of the oil injection guide pipe (7) is connected with one end of the oil injection interface (6), and the other end of the oil injection interface (6) is connected with the thick-wall cylinder (1).
8. An ultrahigh pressure reciprocating seal testing device according to claim 1, characterized in that: the oil liquid collecting device comprises an oil outlet guide pipe (18) and an oil liquid collector (17), the oil outlet guide pipe (18) and the oil liquid collector (17) are respectively provided with two groups, one end of the oil outlet guide pipe (18) is connected with an oil collecting hole (2-2) on the oil collecting end cover (2), and the other end of the oil outlet guide pipe (18) is connected with the oil liquid collector (17).
9. An ultrahigh pressure reciprocating seal testing device according to claim 1, characterized in that: the sensing system further comprises a speed signal transmission line (15), a force signal transmission line (16) and a data terminal (14), the tension and compression sensor (11) transmits signals to the input end of the data terminal (14) through the force signal transmission line (16), and the speed sensor (13) transmits signals to the input end of the data terminal (14) through the speed signal transmission line (15).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493570.4A CN111503276A (en) | 2020-06-03 | 2020-06-03 | Ultrahigh pressure reciprocating sealing test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010493570.4A CN111503276A (en) | 2020-06-03 | 2020-06-03 | Ultrahigh pressure reciprocating sealing test device |
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| CN111503276A true CN111503276A (en) | 2020-08-07 |
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| CN202010493570.4A Pending CN111503276A (en) | 2020-06-03 | 2020-06-03 | Ultrahigh pressure reciprocating sealing test device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137196A (en) * | 2021-04-29 | 2021-07-20 | 四川大学 | High-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device |
-
2020
- 2020-06-03 CN CN202010493570.4A patent/CN111503276A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137196A (en) * | 2021-04-29 | 2021-07-20 | 四川大学 | High-temperature ultrahigh-pressure rotary linear reciprocating dynamic seal testing device |
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