CN218177431U

CN218177431U - Performance test device for simulating ionic liquid hydrogen compressor

Info

Publication number: CN218177431U
Application number: CN202222476322.6U
Authority: CN
Inventors: 陈哲; 王增丽; 孙家璇; 代泽宇; 邵华; 刘宇飞
Original assignee: China University of Petroleum East China
Current assignee: China University of Petroleum East China
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2022-12-30
Anticipated expiration: 2032-09-19

Abstract

The utility model provides a performance test device for simulating an ionic liquid hydrogen compressor, which comprises a cylinder and an air compressor, wherein one end of the cylinder is sealed by a cylinder cover made of transparent materials, a long piston is arranged inside the cylinder, and the long piston is driven to reciprocate inside the cylinder along the inner wall surface of the cylinder so as to compress media in a space among a long piston end surface, the inner wall surface of the cylinder and the inner wall surface of the cylinder cover, and the air compressor provides pressurized gas for the space among the long piston end surface, the inner wall surface of the cylinder and the inner wall surface of the cylinder cover; the device can visually observe the change of the state of the ionic liquid along with the pressure change in the process of compressing gas, can be used for researching the lubricating and sealing performances of the ionic liquid on a hydrogen compressor under different pressures, and can be used for researching the pressure resistance and the wear resistance of sealing elements of different types and different materials.

Description

Performance test device for simulating ionic liquid hydrogen compressor

Technical Field

The utility model relates to a hydrogen compressor technical field specifically is a performance test device of simulation ionic liquid hydrogen compressor.

Background

The hydrogen has rich sources, has the characteristics of cleanness, high efficiency, zero pollution and zero emission as clean energy, and receives wide attention from all countries in the world. With the wide popularization and application of hydrogen energy, the method is favorable for reducing the external dependence of energy in China and is favorable for the green sustainable development of future countries and the world.

The popularization of hydrogen energy must accelerate the construction of the layout of the hydrogen station, wherein the hydrogen compressor is one of three core devices of the hydrogen station, the cost investment is the highest, and the hydrogen compressor is also a main factor for the failure of the hydrogen station, so that the low-cost and high-stability hydrogen compressor is a main research object for the development of the hydrogen station. The ionic liquid hydrogen compressor has the advantages of long maintenance period and high comprehensive efficiency, and has the core advantages of good cooling and lubricating performance of the ionic liquid.

However, the research on the motion characteristics of the ionic liquid in the ionic liquid hydrogen compressor at present is blank, which not only affects the design of key parts of the compressor, such as a piston and a valve, but also affects the performance optimization and product development and upgrade of the ionic liquid hydrogen compressor, so that the establishment of a set of reliable ionic liquid performance test system of the ionic liquid hydrogen compressor is very necessary.

SUMMERY OF THE UTILITY MODEL

In order to realize the above-mentioned purpose, the utility model provides a simulation ionic liquid hydrogen compressor's performance test device, its change that can audio-visually survey ionic liquid self state and take place along with pressure variation at the compressed gas in-process, and can be used for studying the lubrication and the sealing performance that ionic liquid played hydrogen compressor under different pressure to and study the resistance to pressure and the wearability of different models, different material's sealing member.

The utility model adopts the technical scheme as follows: a performance test device for simulating an ionic liquid hydrogen compressor is characterized by comprising an air cylinder and an air compressor, wherein one end of the air cylinder is sealed by a cylinder cover made of a transparent material, preferably, the cylinder cover is made of organic glass and is fixedly installed on a flange at the end part of the air cylinder by using bolts; a long piston is arranged in the cylinder and driven to reciprocate in the cylinder along the inner wall surface of the cylinder so as to compress a medium in a space among the end surface of the long piston, the inner wall surface of the cylinder and the inner wall surface of a cylinder cover, wherein the medium is ionic liquid, and the filling volume of the ionic liquid is less than half of the space;

the cylinder cover is provided with a through hole, the air compressor is communicated to the through hole of the cylinder cover through a gas pipeline, and the air compressor provides pressurized gas for a space among the end surface of the long piston, the inner wall surface of the cylinder and the inner wall surface of the cylinder cover; the gas storage tank is further connected in series to a gas pipeline between the air compressor and the cylinder cover, a safety valve and a first pressure gauge are arranged on the gas storage tank, a pressure sensor and a temperature sensor are arranged at the position of a through hole of the cylinder cover and inside the cylinder, the pressure sensor and the temperature sensor are used for monitoring the state change of gas inside the cylinder in real time in the reciprocating motion compression process of the long piston, and the gas pressure value provided by the air compressor into the cylinder during testing is obtained through the first pressure gauge.

The middle section of the outer peripheral surface of the long piston is recessed towards the radial inner side, the recessed ionic liquid cavity is formed by the recessed ionic liquid, pressurized ionic liquid is filled into the ionic liquid cavity, a first sealing ring and a second sealing ring are further arranged between the outer peripheral surface of the long piston and the inner wall surface of the cylinder, the first sealing ring is located above the ionic liquid cavity, and the second sealing ring is located below the ionic liquid cavity. The device still includes energy storage ware, plunger pump and ionic liquid storage tank, the ionic liquid chamber communicates energy storage ware, plunger pump and ionic liquid storage tank in proper order through the liquid supply pipeline, the plunger pump is used for carrying the ionic liquid pressurization in the ionic liquid storage tank to energy storage ware and ionic liquid intracavity portion, install the second manometer on the energy storage ware, the second manometer is used for knowing in real time the pressure value of ionic liquid in the ionic liquid chamber.

Furthermore, an air valve for controlling the on-off of the air pipeline is arranged at the through hole of the cylinder cover and controls the on-off of the air channel between the air compressor and the inner space of the cylinder.

The first sealing ring and the second sealing ring are both installed in an annular groove formed in the outer peripheral surface of the long piston, one to three annular grooves are formed in the position where the first sealing ring is installed on the outer peripheral surface of the long piston, one to three annular grooves are also formed in the position where the second sealing ring is installed on the outer peripheral surface of the long piston, and according to test requirements, different numbers of sealing rings are installed in the annular grooves so as to probe the influences of the number and the shape of the sealing rings on the sealing performance and the service life.

A first regulating valve for controlling the on-off of a gas pipeline is arranged at an inlet of the gas storage tank, a second regulating valve for controlling the on-off of the gas pipeline is arranged at an outlet of the gas storage tank, and the first regulating valve and the second regulating valve are opened and closed according to test requirements and the maintenance requirements of gas pressure in the gas storage tank; and a third regulating valve for controlling the on-off of the liquid supply pipeline is arranged between the energy accumulator and the ionic liquid cavity, a fourth regulating valve for controlling the on-off of the liquid supply pipeline is arranged between the energy accumulator and the plunger pump, and the third regulating valve and the fourth regulating valve are opened and closed according to test requirements and the maintenance requirements of the ionic liquid pressure in the energy accumulator.

The cylinder is installed on the crankcase, install second step motor in the crankcase, second step motor drives the crank rotation of crank connecting rod structure, the connecting rod of crank connecting rod structure passes through the cross head and is connected with long piston, thereby makes second step motor drive long piston realizes reciprocating motion. The device also comprises a first stepping motor and a third stepping motor, wherein the first stepping motor drives the air compressor to work, and the third stepping motor drives the plunger pump to work.

The utility model discloses technical scheme's advantage lies in:

through the transparent cylinder cover, the physical property change of an ionic liquid layer in the cylinder along with the gas pressure change can be visually observed (or shot by a camera) when a long piston compresses high-pressure gas, and the influence of the ionic liquid along with the reciprocating motion process of a hydrogen compressor piston on the performance of the hydrogen compressor under different pressure states is known; the device can be used for researching the influence of the high-pressure ionic liquid on the sealing and lubricating performances when the high-pressure ionic liquid moves along with a long piston, and researching the sealing performance and the service life of the sealing rings when the number, the types and the materials of the sealing rings matched with the ionic liquid are changed.

The utility model discloses a simulation ionic liquid hydrogen compressor's performance test device can all be safe effectual experiment at 45MPa within range, and pressure range is wide, can satisfy the test demand completely.

Drawings

FIG. 1 is a schematic view of the overall structure of the testing device of the present invention;

in the figure: 1. the device comprises a first stepping motor, 2, an air compressor, 3, a first pressure gauge, 4, a safety valve, 5, a first regulating valve, 6, a second regulating valve, 7, an air storage tank, 8, an air valve, 9, a cylinder cover, 10, a pressure sensor, 11, a temperature sensor, 12, an ionic liquid layer, 13, a cylinder, 14, a long piston, 15, a crosshead, 16, a crankcase, 17, a second stepping motor, 18, an energy accumulator, 19, a plunger pump, 20, ionic liquid for supplying, 21, an ionic liquid storage tank, 22, a third regulating valve, 23, a fourth regulating valve, 24, a third stepping motor, 25, an ionic liquid cavity, 26, a first sealing ring, 27, a second sealing ring, 28 and a second pressure gauge.

Detailed Description

Hereinafter, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, and it will be apparent to those skilled in the art from this detailed description that the present application can be practiced. Features from different embodiments may be combined to yield new embodiments, or certain features may be substituted for certain embodiments to yield yet further preferred embodiments, without departing from the principles of the present application.

Referring to fig. 1, which is a schematic view of the overall structure of the testing device of the present invention, the performance testing device of the simulated ionic liquid hydrogen compressor of the present invention comprises three parts, namely a cylinder assembly, a gas pressure supply assembly and an ionic liquid pressure supply assembly;

the air cylinder assembly comprises an air cylinder 13, one end of the air cylinder 13 is fixedly arranged on a crankcase 16, the other end of the air cylinder 13 is sealed by a cylinder cover 9, the cylinder cover 9 is made of organic glass or other pressure-resistant transparent materials, so that a tester or a high-speed camera can directly observe the internal condition of the air cylinder 13 through the cylinder cover 9, and the cylinder cover 9 is detachably arranged on the air cylinder 13 through bolts; the utility model discloses a long piston 13, including cylinder 13, installation second step motor 17 in the crankcase 16, second step motor 17 drives the motion of crank connecting rod structure, and the connecting rod tip of crank connecting rod structure passes through cross head 15 and connects the connecting rod of long piston 14 tip to under the drive of second step motor 17, drive long piston 14 reciprocating motion by crank connecting rod structure, with the compression to the medium in the space between long piston 14 and the cylinder cap 9 in the cylinder 13.

The gas pressure supply assembly comprises a first stepping motor 1, an air compressor 2 and a gas storage tank 7, the air compressor 2 is communicated to an opening of the cylinder cover 9 through a pipeline, a gas valve 8 is arranged at the opening of the cylinder cover 9, the gas valve 8 controls the gas circuit on-off of the air compressor 2 and the inner space of the cylinder 13, the gas storage tank 7 is arranged between the air compressor 2 and the gas valve 8 and used for storing and buffering high-pressure gas provided by the air compressor 2, a first regulating valve 5 is arranged at an inlet of the gas storage tank 7, a second regulating valve 6 is arranged at an outlet of the gas storage tank 7, a first pressure gauge 3 and a safety valve 4 are further arranged on the gas storage tank 7, a pressure sensor 10 and a temperature sensor 11 are further arranged at the opening of the cylinder cover 9 and inside the cylinder 13 and used for monitoring the state change of the gas inside the cylinder 13 in real time, and the pressure sensor 10 and the temperature sensor 11 can also be arranged at the position, close to the cylinder cover 9, on the inner wall of the cylinder 13.

The ionic liquid pressure supply assembly comprises an ionic liquid storage tank 21, a plunger pump 19, a third stepping motor 24 and an energy accumulator 18, wherein the energy accumulator 18 is sequentially communicated with the plunger pump 19 and the ionic liquid storage tank 21 through a liquid supply pipeline, the energy accumulator 18 is also communicated to an ionic liquid cavity 25 which is formed on the periphery of the long piston 14 and is in an annular gap through a liquid supply pipeline, a supply ionic liquid 20 is stored in the ionic liquid storage tank 21, the plunger pump 19 pressurizes the ionic liquid from the ionic liquid storage tank 21 and then conveys the ionic liquid to the energy accumulator 18 and the ionic liquid cavity 25, and the third stepping motor 24 is used for driving the plunger pump 19 to work. Referring to fig. 1, a third regulating valve 22 is disposed on a liquid supply pipeline between the energy accumulator 18 and the ionic liquid chamber 25, a fourth regulating valve 23 is disposed on a liquid supply pipeline between the energy accumulator 18 and the plunger pump 19, a second pressure gauge 28 is further disposed on the energy accumulator 18, and the pressure of the ionic liquid in the ionic liquid chamber 25 is detected and stabilized by the energy accumulator 18 and the second pressure gauge 28.

Referring to fig. 1, the outer peripheral surface of the middle section of the long piston 14 is recessed toward the inside to form an ionic liquid chamber 25 between the long piston 14 and the inner wall of the cylinder 13, and the axial length of the ionic liquid chamber 25 is such that the liquid supply line always keeps the ionic liquid chamber 25 in communication with the accumulator 18 when the long piston 14 reciprocates; the two ends of the ionic liquid cavity 25 are respectively sealed by a first sealing ring 26 and a second sealing ring 27 which are positioned between the long piston 14 and the inner wall of the cylinder 13, and the first sealing ring 26 and the second sealing ring 27 are both arranged in a groove on the outer peripheral surface of the long piston 14. The first stepping motor 1 drives the air compressor 2 to work, and the air compressor 2 provides high-pressure air, so that the space between the upper end of the long piston 14 in the air cylinder 13 and the cylinder cover 9 is pressurized, and the pressure required by the test is maintained.

The utility model discloses a performance test device of simulation ionic liquid hydrogen compressor possesses two kinds of test states, at a first test state, fills into appropriate amount ionic liquid in the space between long piston 14 upper portion and cylinder cap 9, makes long piston 14 upper portion form ionic liquid layer 12, starts air compressor machine 2, supplies to the pressure numerical value of the first manometer 3 on the gas holder 7 to test pressure, closes first governing valve 5, opens pneumatic valve 8, pressurizes for the space that ionic liquid layer 12 is located, air compressor machine 2 can directly extract air compression to replace hydrogen and test, observes the state change of ionic liquid under the equal pressure value, certainly also can be at the external hydrogen gas pitcher of air compressor machine 2 inlet tube to directly use high-pressure hydrogen to test, gas holder 7 plays the effect of intermediate process temporary storage hydrogen simultaneously; and then the gas valve 8 is closed, the state change of the ionic liquid is observed when the pressure of the ionic liquid changes along with the reciprocating motion of the long piston 14 in the reciprocating motion process of the long piston, the influence of the ionic liquid on the performance of the hydrogen compressor in the reciprocating motion process of the piston of the hydrogen compressor in different pressure states is obtained, and the pressure sensor 10 and the temperature sensor 11 monitor the state change of the gas in the cylinder 13 in real time, so that the corresponding relation between the state change of the gas and the state change of the ionic liquid can be compared.

The second test state is used for researching the sealing performance and the lubricating performance of the pressurized ionic liquid in the ionic liquid cavity 25 when the pressurized ionic liquid reciprocates along with the long piston, specifically, the third step motor 24 drives the plunger pump 19 to work, the pressurized ionic liquid is injected into the ionic liquid cavity 25, after the value of the second pressure gauge 28 reaches the test set pressure, the plunger pump 19 is closed and the fourth regulating valve 23 is closed, in the reciprocating process of the long piston 14, the pressure fluctuation of the pressurized ionic liquid in the ionic liquid cavity 25 is monitored through the second pressure gauge 28, the leakage failure of the sealing rings is judged when the pressure is smaller than the set threshold value, so that the sealing effect of the first sealing ring and the second sealing ring is verified, the types of the first sealing ring and the second sealing ring can be replaced in the test process, for example, different types and different materials of sealing elements such as an O-shaped ring, a V-shaped ring and a combined sealing ring are selected, meanwhile, the first sealing ring and the second sealing ring can be set to be failed, one to three annular grooves for installing the first sealing ring are correspondingly reserved at corresponding positions above the outer peripheral surface of the long piston, and the third annular grooves for installing the second sealing ring are correspondingly reserved at corresponding positions below the long piston. And the reciprocating frequency of the long piston 14 can be controlled by utilizing the second stepping motor 17, the test period is adjusted, the failure life of different types of sealing rings under different pressure ionic liquids is explored, and the pressure resistance of the sealing rings under the sealing requirements is met. The accumulator 18 not only monitors the pressure change condition of the ionic liquid in the ionic liquid cavity 25, but also can ensure the normal pressure of the whole testing device and the safety of the test when the instantaneous pressure is increased due to the abnormal work of the testing device due to the energy of the accumulator 18.

Although the specific embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications or variations can be made by those skilled in the art without inventive changes on the basis of the technical solutions of the present invention.

Claims

1. A performance test device for simulating an ionic liquid hydrogen compressor is characterized by comprising a cylinder and an air compressor, wherein one end of the cylinder is closed by a cylinder cover made of a transparent material, a long piston is arranged in the cylinder and driven to reciprocate in the cylinder along the inner wall surface of the cylinder so as to compress a medium in a space between the end surface of the long piston, the inner wall surface of the cylinder and the inner wall surface of the cylinder cover, the medium is ionic liquid, and the filling volume of the ionic liquid is less than half of the space;

the cylinder cover is provided with a through hole, the air compressor is communicated to the through hole of the cylinder cover through a gas pipeline, and the air compressor provides pressurized gas for a space among the end surface of the long piston, the inner wall surface of the cylinder and the inner wall surface of the cylinder cover; the air compressor is characterized in that an air storage tank is further connected in series on an air pipeline between the air compressor and the cylinder cover, a safety valve and a first pressure gauge are arranged on the air storage tank, and a pressure sensor and a temperature sensor are arranged at a through hole of the cylinder cover and positioned in the cylinder.

2. The device according to claim 1, wherein the intermediate section of the outer peripheral surface of the long piston is recessed radially inward, the recess constitutes an ionic liquid chamber, the ionic liquid chamber is filled with pressurized ionic liquid, and a first seal ring and a second seal ring are provided between the outer peripheral surface of the long piston and the inner wall surface of the cylinder, the first seal ring is located above the ionic liquid chamber, and the second seal ring is located below the ionic liquid chamber.

3. The device according to claim 2, further characterized by further comprising an energy accumulator, a plunger pump and an ionic liquid storage tank, wherein the ionic liquid cavity is communicated with the energy accumulator, the plunger pump and the ionic liquid storage tank in sequence through a liquid supply pipeline, and the plunger pump is used for conveying the replenishing ionic liquid in the ionic liquid storage tank to the energy accumulator and the interior of the ionic liquid cavity in a pressurized manner.

4. The device as claimed in any one of claims 1-3, wherein a gas valve for controlling the on-off of the gas pipeline is arranged at the through hole of the cylinder cover.

5. The apparatus of claim 3, further characterized in that a second pressure gauge is mounted on the accumulator.

6. The device of claim 2, further characterized in that the first and second sealing rings are each mounted in an annular groove provided in the outer periphery of the long piston, the long piston being provided with one to three annular grooves at locations where the first sealing ring is mounted and one to three annular grooves at locations where the second sealing ring is mounted.

7. The device according to any one of claims 1-3, wherein a first regulating valve for controlling the on/off of the gas pipeline is arranged at the inlet of the gas storage tank, and a second regulating valve for controlling the on/off of the gas pipeline is arranged at the outlet of the gas storage tank.

8. The device according to claim 3 or 5, wherein a third regulating valve for controlling the on-off of the liquid supply pipeline is arranged between the energy accumulator and the ionic liquid cavity, and a fourth regulating valve for controlling the on-off of the liquid supply pipeline is arranged between the energy accumulator and the plunger pump.

9. The apparatus according to any one of claims 1 to 3, wherein the cylinder is mounted on a crankcase, and a second stepping motor is mounted in the crankcase, and the second stepping motor rotates a crank of a crank-link structure, and a link of the crank-link structure is connected to the long piston through a crosshead, so that the second stepping motor drives the long piston to reciprocate.

10. The apparatus of claim 3, further comprising a first stepper motor and a third stepper motor, wherein the first stepper motor drives the air compressor and the third stepper motor drives the plunger pump.