阅读说明：本技术 冷媒传输耦合装置测试系统 (Testing system for refrigerant transmission coupling device ) 是由 董相文 李阳 苏玉磊 何智 张茜 杜婉榕 韩远昭 章学华 丁怀况 于 2021-08-27 设计创作，主要内容包括：本发明公开一种冷媒传输耦合装置的测试系统,通过波纹管组件及滑移轨道的设计,可实现快速拆卸冷媒连接管路,且无需大幅度拆装设备,即可快速更换静止组件,实现不同待测样品的快速更换,既保证设备的装配精度,又节约时间,提高工作效率。采用长杆低温阀作为回气通路的转折点,既能够根据需求演示不同开度,模拟不同转子的流动阻力负载,又能够随同系统一起转动实现不同转速的模拟,满足不同型号待测对冷媒传输耦合装置的测试需求。本发明提供的测试系统,针对冷媒传输耦合装置进行效率测试,在冷媒传输耦合装置的测试技术领域为首次提出。(The invention discloses a test system of a refrigerant transmission coupling device, which can realize quick disassembly of a refrigerant connecting pipeline through the design of a corrugated pipe assembly and a sliding track, can quickly replace a static assembly without largely disassembling and assembling equipment, realizes quick replacement of different samples to be tested, ensures the assembly precision of the equipment, saves time and improves the working efficiency. The long-rod low-temperature valve is used as a turning point of the air return passage, so that different opening degrees can be demonstrated according to requirements, the flow resistance loads of different rotors can be simulated, the long-rod low-temperature valve can rotate along with the system to realize the simulation of different rotating speeds, and the test requirements of different models to be tested on the refrigerant transmission coupling device can be met. The test system provided by the invention is used for carrying out efficiency test on the refrigerant transmission coupling device, and is put forward for the first time in the technical field of testing of the refrigerant transmission coupling device.)

1. The test system of the refrigerant transmission coupling device comprises a static component (1-1) and a rotating component (1-2), wherein the static component (1-1) is coaxially sleeved in the rotating component (1-2); the static component (1-1) is provided with a first refrigerant passage (10) and a second refrigerant passage (20), the first refrigerant passage (10) is an air inlet passage, and the second refrigerant passage (20) is an air return passage;

the testing system is characterized by comprising a first vacuum bin and a second vacuum bin;

the first vacuum bin and the static component (1-1) are detachably fixed in a sealing manner; at least one end of the first vacuum bin is provided with a corrugated pipe (111), an air inlet pipe (50) and an air return pipe (60) of a refrigerant supply system are respectively connected with the end A of the first refrigerant passage (10) and the end B of the second refrigerant passage (20), and a joint is positioned in an exposed section of the first vacuum bin behind the compressed corrugated pipe (111);

the rotating assembly (1-2) is fixed at one end of a second vacuum bin in a sealing and rotating mode, and the end A 'of the first refrigerant passage (10) and the end B' of the second refrigerant passage (20) are located in the second vacuum bin;

the other end of the second vacuum bin is fixedly sealed with a long rod low-temperature valve 21, the air inlet end of the long rod low-temperature valve 21 is positioned in the second vacuum bin and coaxially fixed with the C end of a third refrigerant passage (30), and the C 'end of the third refrigerant passage (30) is coaxially fixed with the end part of the rotating assembly (1-2) positioned in the second vacuum bin and communicated with the A' end of the first refrigerant passage (10); the air outlet of the long-rod low-temperature valve 21 is communicated with the B' end of the second refrigerant passage (20) through a fourth refrigerant passage (40);

the air inlet pipe (50) and the third refrigerant passage (30) are respectively provided with a heating assembly (31), and the upstream and the downstream of the heating assembly (31) are respectively provided with a temperature sensor;

the driving mechanism drives the second vacuum chamber, the long-rod low-temperature valve (21), the rotating component (1-2), the third refrigerant passage (30) and the fourth refrigerant passage (40) to rotate by a rotating shaft of the rotating component (1-2).

2. The system for testing the refrigerant transmission coupling device according to claim 1, wherein the first vacuum chamber comprises a first vacuum tube (11), a third bracket (12); the first vacuum tube (11) is fixed on the third bracket (12); the first vacuum tube (11) and the static component (1-1) are fixed in a sealing way through a flange plate; a first through hole and a second through hole are formed in a flange plate between the first vacuum tube (11) and the static component (1-1); the end A of the first refrigerant passage (10) passes through a first through hole to be communicated with the air inlet pipe (50), and the end B of the second refrigerant passage (20) passes through a second through hole to be communicated with the air return pipe (60); the air inlet pipe (50) and the air return pipe (60) respectively penetrate out of the first vacuum pipe (11) and are communicated with an outlet and an inlet of the refrigerant supply system.

3. The system for testing the refrigerant transmission coupling device according to claim 1, further comprising a first supporting mechanism, a second vacuum tube (22);

the first support mechanism comprises a first bracket (23) and a first bearing (24); the second supporting mechanism comprises a second bracket (25) and a second bearing (26); two ends of the second vacuum tube (22) are respectively fixed on the first support (23) and the second support (25) through a first bearing (24) and a second bearing (26); the rotating assembly (1-2) and the long-rod low-temperature valve (21) are respectively fixed with two ends of the first vacuum pipe (11) in a sealing mode to form the second vacuum bin.

4. The system for testing the refrigerant transmission coupling device according to claim 3, wherein two ends of the second vacuum tube (22) are respectively fixed with the first supporting mechanism and the second supporting mechanism by a first mounting seat (222) and a second mounting seat (223) in a rotating manner; the two ends of the second vacuum tube (22) are provided with first flange plates (224); the first mounting seat (222) and the second mounting seat (223) are respectively fixed in bearing holes corresponding to the first bearing (24) and the second bearing (26), and one end, facing the first flange plate (224), of the first mounting seat is provided with a second flange plate (225); the second vacuum tube (22) is sealed and fixed with a second flange plate (225) through a first flange plate (224); the first mounting seat (222) and the second mounting seat (223) are respectively provided with a mounting position for sealing and fixing the rotating component (1-2) and the long-rod low-temperature valve (21); the driving mechanism drives the second mounting seat (223) to rotate, so that the second vacuum tube (22), the first mounting seat (222), the second mounting seat (223), the long-rod low-temperature valve (21), the rotating assembly (1-2), the third refrigerant passage (30) and the fourth refrigerant passage (40) are driven to coaxially rotate.

5. The system for testing a refrigerant transmission coupling device according to claim 4, wherein the second flange (225) has a circumference extending beyond the annular flange (226) in a direction toward the first flange; the first flange (224) is captured within the annular flange (226).

6. The system for testing the refrigerant transmission coupling device according to claim 5; characterized in that the circumference of the first flange plate (224) is chamfered.

7. The system for testing a refrigerant transmission coupling device according to any one of claims 4 to 6; the sealing ring is characterized in that at least one sealing ring is arranged between the first flange plate (224) and the second flange plate (225).

8. The system for testing a refrigerant transmission and coupling device according to any one of claims 1 to 6; the fourth refrigerant passage (40) comprises an annular pipe (401) and two straight pipes (402); the annular pipe (401) is communicated with an air outlet of the long rod low temperature valve (21) through a connecting pipe; one ends of the two straight pipes (402) are respectively communicated with the annular pipe (401), and the other ends of the two straight pipes are respectively communicated with the end B' of the second refrigerant passage (20).

9. The system for testing the refrigerant transmission coupling device according to claim 8; the device is characterized in that the two straight pipes (402) are respectively fixed at two ends of the diameter of the annular pipe (401).

10. The system for testing the refrigerant transmission coupling device according to claim 8; the two straight pipes (402) are respectively fixed with the stabilizer bars (29) at the corresponding positions through stabilizer frames, and the two stabilizer bars (29) are fixed in the second vacuum pipe (22).

11. The system for testing a refrigerant transmission coupling device as claimed in any one of claims 3 to 6, further comprising a lifting support mechanism; the lifting support mechanism comprises a lifting frame (41) and a roller (42); the lifting frame (41) is fixed on the workbench (100), and the roller (42) is rotationally fixed at the top of the lifting frame (41) and is positioned below the second vacuum tube (22).

12. The system for testing the refrigerant transmission coupling device as claimed in claim 11, wherein the lifting frame (41) comprises a cylinder (411) and a base (412); the cylinder seat of the air cylinder (411) is fixed on the workbench (100), the output end of the air cylinder faces upwards, the base (412) is fixed at the output end, and the roller (42) is rotationally fixed on the upper surface of the base (412).

13. The system for testing the refrigerant transmission coupling device according to claim 3, further comprising a sleeve (27); two ends of the sleeve (27) are coaxially fixed with the second mounting seat (223) and an output shaft of the driving motor 28 respectively; the valve seat of the long-rod low-temperature valve (21) is positioned in the sleeve (27).

14. The system for testing a refrigerant transmission coupling device as claimed in claim 13, wherein the casing (27) has an observation window formed on a body thereof.

15. The system for testing a refrigerant transmission coupling device according to claim 13 or 14, further comprising a signal transmission assembly; the signal transmission assembly comprises a conductive slip ring (33) and a hermetic sealing vacuum socket (34) which is hermetically fixed on the second mounting seat (223); the conductive slip ring (33) comprises an outer ring and an inner ring; the inner ring is sleeved and fixed on an output shaft of a driving motor (28); and the temperature sensor signal wire and the heating lead wire positioned in the second vacuum bin are electrically connected with the inner ring through an air-tight sealing vacuum socket (34), and the outer ring is electrically connected with the control cabinet.

16. The system for testing the refrigerant transmission coupling device according to claim 15, wherein the output shaft is connected to the sleeve (27) by a flexible coupling.

17. The system for testing the refrigerant transmission coupling device according to claim 15, further comprising a fourth supporting mechanism, wherein the fourth supporting mechanism comprises a fourth bracket (36) and a fourth bearing (37); the output shaft is rotationally fixed on a fourth support (36) through a fourth bearing (37), the inner ring is sleeved on the output shaft, and the outer ring is fixed with the fourth support (36); the output shaft, the inner ring, the outer ring, the sleeve (27), the second mounting seat (223), the long-rod low-temperature valve (21), the rotating assembly (1-2), the third refrigerant passage (30) and the fourth refrigerant passage (40) are coaxial.

18. The system for testing a refrigerant transmission coupling device as claimed in claim 17, further comprising a table (100); a rail (1001) is arranged on the workbench (100); the first bracket (23), the second bracket (25) and the fourth bracket (36) are fixed on the track (1001) in a sliding mode.

Technical Field

The invention relates to the technical field of experimental equipment of a refrigerant transmission coupling device, in particular to a test system of the refrigerant transmission coupling device.

Background

Since the discovery of high-temperature superconducting materials in 1986, the development of high-temperature superconducting materials has been fast and has led to the follow-up development in many countries of the world, and the development and application fields of superconducting wires are becoming more and more extensive, such as superconducting current limiters, superconducting cables, superconducting motors, superconducting magnetic energy storage, and the like.

Among them, the superconducting motor has many advantages compared with the general motor, and is one of the future development directions of the motor. At present, most of superconducting motors are in a research and development stage, and because of the particularity of superconducting performance, a plurality of test devices for testing relevant specialities exist at present, for example, chinese patent documents with publication number CN102495263A, publication date of 2012 6 month and 13 day, invented name of "a high-temperature superconducting motor magnet performance test device", and the test device includes a magnetic side plate and a magnetic arc top plate: the two magnetic conduction side plates form a V-shaped angle and form a magnetic conduction loop with the magnetic conduction arc top plate: the magnetic conduction side plate, the magnetic conduction arc top plate and the stainless steel end plates at the two ends form a vacuum container: the stainless steel end plate is provided with a vacuumizing interface: the vacuum container is internally provided with a heat exchanger, and the heat exchanger is connected with a magnetic conduction arc top plate through an insulating stud: and a refrigerant inlet and outlet port communicated with a refrigerant container or a refrigerator is arranged on the magnetic conductive arc top plate. The device mainly aims at the performance test of the superconducting motor magnet, and does not aim at any test of a cooling system.

However, according to the particularity of superconductivity, the superconducting motor can realize the non-resistance current carrying in the superconducting state only in a low-temperature environment, so that the refrigerating system is related to the feasibility and the reliability of the whole system to a great extent, and is one of the key technologies of the superconducting motor. At present, the cooling methods of the high-temperature superconducting rotating component 1-2 are mainly known as the following three methods:

1. the high-temperature superconducting magnet is directly immersed in liquid nitrogen or supercooled liquid nitrogen, and the method is direct, simple, safe and reliable. However, due to heat leakage of the low-temperature container and heat conduction of the current lead, liquid nitrogen needs to be supplemented continuously, and the working temperature of the magnet is about 77K, so that the requirement of a 30K temperature zone cannot be met.

2. The superconducting magnet is directly conducted and cooled through the cryogenic refrigerator, the method is simple and direct, but the method cannot be applied to the rotating component 1-2 of the rotating superconducting motor, and particularly the linear velocity is high.

3. Cold helium gas is used as a cooling medium. The cold helium does not generate phase change in the working temperature region of the superconducting magnet, can adopt a special pump as circulating power, is particularly suitable for the scheme of a normal-temperature shaft of a rotating assembly 1-2 of the superconducting motor, and is the best known choice of a refrigerant of a low-temperature system of the high-temperature superconducting motor. Cold helium is used as a refrigerant, a refrigerant transmission coupling device is used for dynamic and static transition between a low-temperature system of the superconducting motor and the rotating assembly 1-2, the refrigerant transmission coupling device adopts non-contact sealing at the dynamic and static transition part, and the non-contact sealing has unavoidable short circuit bypass flow. Due to the high cost of cryogenic helium, the availability of a certain amount of cryogenic helium can affect the volume of superconducting motors. For example, under the condition that the utilization rate of the low-temperature helium gas of 1KG is only 50%, only the superconducting motor with small volume can be cooled, and when the utilization rate of the low-temperature helium gas of 1KG is 90%, the superconducting motor with larger volume can be cooled. Therefore, it is necessary to know the transmission efficiency of the refrigerant transmission coupling device under low temperature and rotation conditions, so as to facilitate the design and improvement of the refrigerant transmission coupling device. Therefore, the method for accurately measuring the transmission performance of the refrigerant transmission coupling device has important significance for the superconducting motor.

The invention discloses a superconducting low-temperature rotating test bed with the publication number of CN104502843B, and the rotating test bed is designed to rotate at a single end and test the states of superconducting materials, binding materials and the like of a superconducting motor in a rotating state, although the superconducting motor in a low-temperature state is also tested, the inner leakage rate test of a refrigerant transmission coupling device is not suitable.

Disclosure of Invention

The invention aims to provide a device for testing the internal leakage rate of a rotating part (namely a refrigerant transmission coupling device) at low temperature.

The invention solves the technical problems through the following technical means:

the test system of the refrigerant transmission coupling device comprises a static component (1-1) and a rotating component (1-2), wherein the static component (1-1) is coaxially sleeved in the rotating component (1-2); the static component (1-1) is provided with a first refrigerant passage (10) and a second refrigerant passage (20), the first refrigerant passage (10) is an air inlet passage, and the second refrigerant passage (20) is an air return passage;

the test system comprises a first vacuum chamber and a second vacuum chamber;

the first vacuum bin and the static component (1-1) are detachably fixed in a sealing manner; at least one end of the first vacuum bin is provided with a corrugated pipe (111), an air inlet pipe (50) and an air return pipe (60) of a refrigerant supply system are respectively connected with the end A of the first refrigerant passage (10) and the end B of the second refrigerant passage (20), and a joint is positioned in an exposed section of the first vacuum bin behind the compressed corrugated pipe (111);

the rotating assembly (1-2) is fixed at one end of a second vacuum bin in a sealing and rotating mode, and the end A 'of the first refrigerant passage (10) and the end B' of the second refrigerant passage (20) are located in the second vacuum bin;

the other end of the second vacuum bin is fixedly sealed with a long rod low-temperature valve 21, the air inlet end of the long rod low-temperature valve 21 is positioned in the second vacuum bin and coaxially fixed with the C end of a third refrigerant passage (30), and the C 'end of the third refrigerant passage (30) is coaxially fixed with the end part of the rotating assembly (1-2) positioned in the second vacuum bin and communicated with the A' end of the first refrigerant passage (10); the air outlet of the long-rod low-temperature valve 21 is communicated with the B' end of the second refrigerant passage (20) through a fourth refrigerant passage (40);

the air inlet pipe (50) and the third refrigerant passage (30) are respectively provided with a heating assembly (31), and the upstream and the downstream of the heating assembly (31) are respectively provided with a temperature sensor;

the driving mechanism drives the second vacuum chamber, the long-rod low-temperature valve (21), the rotating component (1-2), the third refrigerant passage (30) and the fourth refrigerant passage (40) to rotate by a rotating shaft of the rotating component (1-2).

According to the invention, through the design of the corrugated pipe (111), a pipeline can be quickly connected, and the equipment does not need to be greatly disassembled and assembled, so that the assembly precision of the equipment is ensured, the time is saved, and the working efficiency is improved.

The long-rod low-temperature valve is used as a turning point of the air return passage, so that the flow resistance loads of cooling pipelines of different coil rotors can be simulated, and the test requirements of different models for the refrigerant transmission coupling device to be tested are met.

Further, the first vacuum bin comprises a first vacuum tube (11) and a third bracket (12); the first vacuum tube (11) is fixed on the third bracket (12); the first vacuum tube (11) and the static component (1-1) are fixed in a sealing way through a flange plate; a first through hole and a second through hole are formed in a flange plate between the first vacuum tube (11) and the static component (1-1); the end A of the first refrigerant passage (10) passes through a first through hole to be communicated with the air inlet pipe (50), and the end B of the second refrigerant passage (20) passes through a second through hole to be communicated with the air return pipe (60); the air inlet pipe (50) and the air return pipe (60) respectively penetrate out of the first vacuum pipe (11) and are communicated with an outlet and an inlet of the refrigerant supply system.

Further, the device also comprises a first supporting mechanism, a second supporting mechanism and a second vacuum tube (22);

the first support mechanism comprises a first bracket (23) and a first bearing (24); the second supporting mechanism comprises a second bracket (25) and a second bearing (26); two ends of the second vacuum tube (22) are respectively fixed on the first support (23) and the second support (25) through a first bearing (24) and a second bearing (26); the rotating assembly (1-2) and the long-rod low-temperature valve (21) are respectively fixed with two ends of a second vacuum pipe (22) in a sealing mode to form the second vacuum bin.

Furthermore, two ends of the second vacuum tube (22) are respectively fixed with the first supporting mechanism and the second supporting mechanism in a rotating mode through a first mounting seat (222) and a second mounting seat (223); the two ends of the second vacuum tube (22) are provided with first flange plates (224); the first mounting seat (222) and the second mounting seat (223) are respectively fixed in bearing holes corresponding to the first bearing (24) and the second bearing (26), and one end, facing the first flange plate (224), of the first mounting seat is provided with a second flange plate (225); the second vacuum tube (22) is sealed and fixed with a second flange plate (225) through a first flange plate (224); the first mounting seat (222) and the second mounting seat (223) are respectively provided with a mounting position for sealing and fixing the rotating component (1-2) and the long-rod low-temperature valve (21); the driving mechanism drives the second mounting seat (223) to rotate, so that the second vacuum tube (22), the first mounting seat (222), the second mounting seat (223), the long-rod low-temperature valve (21), the rotating assembly (1-2), the third refrigerant passage (30) and the fourth refrigerant passage (40) are driven to coaxially rotate.

Further, the circumference of the second flange plate (225) extends out of the annular flange (226) towards the direction of the first flange; the first flange (224) is captured within the annular flange (226).

Furthermore, the circumference of the first flange plate (224) is designed to be chamfered.

Furthermore, at least one sealing ring is arranged between the first flange plate (224) and the second flange plate (225).

Further, the fourth refrigerant passage (40) comprises an annular pipe (401) and two straight pipes (402); the annular pipe (401) is communicated with an air outlet of the long rod low temperature valve (21) through a connecting pipe; one ends of the two straight pipes (402) are respectively communicated with the annular pipe (401), and the other ends of the two straight pipes are respectively communicated with the end B' of the second refrigerant passage (20).

Furthermore, the two straight pipes (402) are respectively fixed at two ends of the diameter of the annular pipe (401).

Furthermore, two stabilizer bars (29) are fixed in the second vacuum tube (22), and the two straight tubes (402) are respectively fixed with the stabilizer bars (29) at corresponding positions through stabilizer frames.

Furthermore, a lifting support mechanism is also included; the lifting support mechanism comprises a lifting frame (41) and a roller (42); the lifting frame (41) is fixed on the workbench (100), and the roller (42) is rotationally fixed at the top of the lifting frame (41) and is positioned below the second vacuum tube (22).

Further, the lifting frame (41) comprises a cylinder (411) and a base (412); the cylinder seat of the air cylinder (411) is fixed on the workbench (100), the output end of the air cylinder faces upwards, the base (412) is fixed at the output end, and the roller (42) is rotationally fixed on the upper surface of the base (412).

Further, the device also comprises a sleeve (27); two ends of the sleeve (27) are coaxially fixed with the second mounting seat (223) and an output shaft of the driving motor 28 respectively; the valve seat of the long-rod low-temperature valve (21) is positioned in the sleeve (27).

Furthermore, an observation window is arranged on the tube body of the sleeve (27).

Further, the device also comprises a signal transmission component; the signal transmission assembly comprises a conductive slip ring (33) and a hermetic sealing vacuum socket (34) which is hermetically fixed on the second mounting seat (223); the conductive slip ring (33) comprises an outer ring and an inner ring; the inner ring is sleeved and fixed on an output shaft of a driving motor (28); and a temperature sensor signal wire positioned in the second vacuum bin is electrically connected with the inner ring through an air-tight vacuum socket (34), and the outer ring is electrically connected with the control cabinet.

Further, the output shaft is connected with the sleeve (27) through a flexible coupling.

Further, the device also comprises a fourth supporting mechanism, wherein the fourth supporting mechanism comprises a fourth bracket (36) and a fourth bearing (37); the output shaft is rotationally fixed on a fourth support (36) through a fourth bearing (37), the inner ring is sleeved on the output shaft, and the outer ring is fixed with the fourth support (36); the output shaft, the conductive slip ring (33), the sleeve (27), the second mounting seat (223), the long-rod low-temperature valve (21), the rotating assembly (1-2), the third refrigerant passage (30) and the fourth refrigerant passage (40) are coaxial.

Further, the device also comprises a workbench (100); a rail (1001) is arranged on the workbench (100); the first bracket (25), the second bracket (25) and the fourth bracket (36) are fixed on the track (1001) in a sliding mode.

The invention has the advantages that:

a. according to the invention, through the design of the corrugated pipe assembly and the sliding track, the refrigerant connecting pipeline can be quickly disassembled, the static assembly can be quickly replaced without largely disassembling and assembling the equipment, the quick replacement of different samples to be tested is realized, the assembly precision of the equipment is ensured, the time is saved, and the working efficiency is improved.

b. The long-rod low-temperature valve is used as a turning point of the air return passage, so that different opening degrees can be demonstrated according to requirements, the flow resistance loads of different rotors can be simulated, the long-rod low-temperature valve can rotate along with the system to realize the simulation of different rotating speeds, and the test requirements of different models to be tested on the refrigerant transmission coupling device can be met.

c. The air return passage formed by the annular pipe and the straight pipe arranged in the second vacuum pipe can enable air flow to smoothly turn and reduce turbulence, and in addition, the vibration of the pipeline in the rotating process is further reduced through the design of the stabilizer bar.

d. Through the design of the track on the worktable, the second supporting mechanism and the fourth supporting mechanism can carry all the components on the second supporting mechanism and the second vacuum tube to move to one side, so that the components in the second vacuum tube are exposed, and the pipeline and the electric elements in the second vacuum bin can be conveniently replaced, installed, disassembled and maintained; the stability and the integrity of the whole structure of the test system are not influenced by the operation, and the coaxiality and the assembly precision of all parts are prevented from being damaged by frequent disassembly and assembly.

e. The design of flange can further improve sealed effect, and the chamfer design on the first ring flange provides the spigot surface for the assembly of first ring flange and flange, the assembly of being convenient for.

f. And the conductive slip ring is adopted, so that the signal output in a rotating state can be realized, and the influence of rotation on a complex signal wire is avoided. Especially, the adoption of the sleeve not only provides a placing space for the long-rod low-temperature valve, but also can be used as a transmission part of the motor, especially a signal wire of the temperature sensor can be fixed in the sleeve and connected with an inner ring of the conductive sliding ring, and the signal wire rotates along with the sleeve, so that the rotation is not influenced.

Drawings

Fig. 1 is a schematic overall structure diagram of a test system in embodiment 1 of the present invention;

FIG. 2 is a sectional view of a test system in example 1 of the present invention along its length;

FIG. 3 is an enlarged view of M1 shown in FIG. 2;

FIG. 4 is an enlarged view of M2 shown in FIG. 2;

FIG. 5 is an enlarged view of M3 shown in FIG. 2;

FIG. 6 is an enlarged view of the portion N in FIG. 4;

fig. 7 is an enlarged schematic view of the portion P in fig. 6.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all 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.

Example 1

The embodiment discloses a test system of a refrigerant transmission coupling device, as shown in fig. 3 and 4, the refrigerant transmission coupling device comprises a static component 1-1 and a rotating component 1-2, wherein the static component 1-1 is coaxially sleeved in the rotating component 1-2; the stationary component 1-1 is provided with a first refrigerant passage 10 and a second refrigerant passage 20, the first refrigerant passage 10 is an air inlet passage, the second refrigerant passage 20 is an air return passage, and the second refrigerant passage 20 is an annular passage sleeved outside the first refrigerant passage 10 and is coaxial with the first refrigerant passage 10.

The test system comprises a first vacuum chamber and a second vacuum chamber;

as shown in fig. 1, in the present embodiment, the first vacuum chamber includes a first vacuum tube 11, a third bracket 12; the first vacuum tube 11 includes a bellows 111 (typically stainless steel 316L bellows) and a metal tube 112, and the metal tube 112 is fixed to the third bracket 12. The bellows 111 and the metal pipe 112 are fixed by a flange seal, and the other end of the metal pipe 112 is connected with the refrigerant supply system seal to form a vacuum side.

As shown in fig. 3, the bellows 111 is fixed to the stationary component 1-1 by a flange, and the flange can be fixed by a caliper seal, so that the first vacuum tube 11 is sealed to form a first vacuum chamber; a first through hole and a second through hole are formed in the flange plate between the corrugated pipe 111 and the static component 1-1; the end a of the first refrigerant passage 10 passes through the first through hole and is communicated with the air inlet pipe 50, the end B of the second refrigerant passage 20 is communicated with the air return pipe 60 through the second through hole, and the pipeline joint is positioned in the exposed section of the first vacuum chamber behind the compression corrugated pipe 111. The air inlet pipe 50 and the air return pipe 60 respectively penetrate out of the metal pipe 112 to be communicated with an outlet and an inlet of the refrigerant supply system. Before testing, the corrugated pipe 111 can be compressed to expose the operating surface, the connection of pipelines can be realized without disassembling the whole vacuum pipe, and after the connection is finished, the corrugated pipe 111 and the flange plate of the static component 1-1 are sealed and fixed by calipers. After the test is finished, the sealing and fixing relationship between the corrugated pipe 111 and the static component 1-1 is removed, the corrugated pipe 111 is compressed, and the connection relationship between the refrigerant transmission coupling device to be tested and the refrigerant supply mechanism can be removed by exposing the pipeline joint. In this embodiment, the first vacuum tube 11 may be fixed to the stationary component 1-1 by sealing the end of the bellows 111, or may be fixed to the stationary component 1-1 by sealing the end of the metal tube 112, as long as the joint of the pipeline is located in the exposed section after compressing the bellows 111.

As shown in fig. 4, 5 and 6, the rotating assembly 1-2 is hermetically and rotatably fixed at one end of the second vacuum chamber, and the other end of the second vacuum chamber is hermetically and fixedly provided with a long rod low temperature valve 21. The end of the first refrigerant channel 10A 'and the end of the second refrigerant channel 20B' are positioned in the second vacuum bin; the air inlet end of the long rod low-temperature valve 21 is positioned in the second vacuum bin and coaxially fixed with the end 30C of the third refrigerant passage, and the end 30C 'of the third refrigerant passage is coaxially fixed with the end part of the rotating assembly 1-2 positioned in the second vacuum bin and coaxially communicated with the end 10A' of the first refrigerant passage; the outlet of the long rod low temperature valve 21 is communicated with the end of the second refrigerant channel 20B' through a fourth refrigerant channel 40. The concrete structure is as follows:

the second vacuum chamber includes a second vacuum tube 22, which is generally a metal tube, and the second vacuum tube 22 is supported, fixed, sealed and rotated by the first and second supporting mechanisms.

The first support mechanism comprises a first bracket 23 and a first bearing 24; the second support mechanism comprises a second bracket 25 and a second bearing 26; two ends of the second vacuum tube 22 are respectively fixed with the first supporting mechanism and the second supporting mechanism through a first mounting seat 222 and a second mounting seat 223; specifically, the second vacuum tube 22 has a first flange 224 at both ends; the first mounting seat 222 and the second mounting seat 223 are fixed in bearing holes of the first bearing 24 and the second bearing 26, respectively, and one end facing the first flange 224 is provided with a second flange 225; the second vacuum tube 22 is fixed with a second flange 225 through a first flange 224 in a sealing way; the first mounting seat 222 and the second mounting seat 223 are respectively provided with a mounting position for sealing and fixing the rotating component 1-2 and the long-rod low-temperature valve 21. The second vacuum tube 22, the first mounting seat 222, the second mounting seat 223, the rotating assembly 1-2 and the sealing and fixing structure of the long-rod low-temperature valve 21 form a second vacuum chamber. The driving mechanism drives the second mounting seat 223 to rotate, so as to drive the second vacuum tube 22, the first mounting seat 222, the long-rod low-temperature valve 21, the rotating assembly 1-2, the third refrigerant passage 30 and the fourth refrigerant passage 40 to coaxially rotate. In this embodiment, the first mounting seat 222 and the second mounting seat 223 have the same structure, and are both hollow cylinders with one open end and one closed end; a second flange 225 is provided at the opening of the first mount 222/second mount 223.

In this embodiment, as shown in fig. 7, the second flange 225 extends circumferentially beyond the annular flange 226 in a direction toward the first flange; the first flange 224 is captured within an annular flange 226. Through the arrangement of the flange 226, the first flange 224 is conveniently limited and mounted on one hand, and the right angle of the flange 226 is convenient, so that the sealing effect can be further improved. The circumference of the first flange 224 is chamfered to form a guide surface 227 for smooth insertion into the flange 226. At least one sealing ring is arranged between the first flange 224 and the second flange 225.

As shown in fig. 5, in the present embodiment, the fourth refrigerant passage 40 includes an annular pipe 401 and two straight pipes 402; the annular pipe 401 is communicated with the air outlet of the long rod low temperature valve 21 through a connecting pipe; one ends of the two straight pipes 402 are respectively communicated with the annular pipe 401, and the other ends are respectively communicated with the B' end of the second refrigerant passage 20. The design of the annular pipe 401 can enable the return air flow to be smoothly reversed, and turbulence is avoided. In this embodiment, the two straight pipes 402 are respectively fixed at two ends of the diameter of the annular pipe 401, so that the return air flow can be better dispersed, and the vibration of the pipeline can be reduced.

Because the disk seat of stock low temperature valve 21 is located outside the second vacuum storehouse, in order to keep the axiality, this embodiment is through the sleeve pipe 27 that sets up as the driving medium, and concrete structure is: two ends of the sleeve 27 are coaxially fixed with the second mounting seat 223 and the output shaft of the driving motor 28 respectively; the valve seat of long stem cryovalve 21 is located within sleeve 27. The body of the sleeve 27 is provided with an observation window.

In this embodiment, as shown in fig. 3 and 5, the air inlet pipe 50 and the third refrigerant passage 30 are respectively provided with a heating assembly 31, and the upstream and downstream of the heating assembly 31 are respectively provided with a temperature sensor (not shown); the refrigerant loss can be calculated according to the temperature difference of the refrigerant before and after entering the refrigerant transmission coupling device. The heating element 31 in this embodiment is formed by winding a heating wire around a corresponding pipe. The heating wire in the second vacuum chamber is electrically connected to the power supply by passing through the second mounting seat 223 via the airtight vacuum connector.

The signal transmission mode in this embodiment is: as shown in fig. 5, the signal transmission assembly includes a conductive slip ring 33, a hermetic vacuum socket 34 hermetically fixed on the second mounting seat 223; the conductive slip ring 33 comprises an outer ring and an inner ring; the inner ring is sleeved and fixed on an output shaft of the driving motor 28; the signal wire of the temperature sensor 32 and the cable wire of the heating component 31 in the second vacuum chamber are electrically connected with the inner ring through the air-tight vacuum socket 34, and the outer ring is electrically connected with the control cabinet. The output shaft is connected with the sleeve 27 by a flexible coupling (not shown in the figure) to reduce vibration. Wherein the output shaft of the driving motor 28 is rotationally fixed to the fourth supporting mechanism. The fourth supporting mechanism comprises a fourth bracket 36 and a fourth bearing 37; the output shaft is rotationally fixed on a fourth bracket 36 through a fourth bearing 37, an inner ring is sleeved on the output shaft, and an outer ring is fixed with the fourth bracket 36; the output shaft, the inner ring, the outer ring, the sleeve 27, the second mounting seat 223, the long-rod low-temperature valve 21, the rotating assembly 1-2, the third refrigerant passage 30 and the fourth refrigerant passage 40 are coaxial. It should be noted that, since the first vacuum tube 11 does not need to rotate, the transmission line of the temperature sensor 32 and the cable of the heating assembly located in the first vacuum tube 11 can be directly electrically connected to the control cabinet through the airtight vacuum socket on the first vacuum tube 11. In this embodiment, the driving motor 28 is fixed on the worktable of the fourth bracket, and drives the output shaft to rotate through the belt pulley, and the structure is a conventional structure and will not be described in detail.

The second mounting base 223 is further provided with a vacuum port 2231 for vacuumizing the second vacuum chamber.

Example 2

As shown in fig. 5, in this embodiment 1, two stabilizer bars 29 are fixed in the second vacuum tube 22, and two straight tubes 402 are fixed to the stabilizer bars 29 at corresponding positions by stabilizer brackets, respectively, thereby further improving the stability of the straight tubes 402 and reducing vibration.

Example 3

On the basis of embodiments 1 and 2, the present embodiment is provided with a rail 1001 on the table 100; the first bracket 23, the second bracket 25, and the fourth bracket 36 are slidably fixed to the rail 1001.

After the corrugated pipe is disassembled, the pipeline joint inside the corrugated pipe is disassembled, and the static component can be pulled out of the rotating component by sliding the first support 23, the second support 25 and the fourth support 36, so that the rotating end of the testing system can integrally move without disassembling, and the sample to be tested can be quickly and conveniently changed;

meanwhile, the second vacuum tube 22 is released from the fixed relationship with the first bracket 23, and the second bracket 25 and the fourth bracket 36 are slid, so that the second vacuum tube 22 and all the components fixed with the second bracket 25 and the fourth bracket 36 can be driven to move together, the pipeline in the second vacuum chamber is exposed, and the pipeline and the electric elements in the second vacuum chamber can be conveniently replaced, installed, disassembled and maintained.

The bottoms of the first bracket 23, the second bracket 25, and the fourth bracket 36 are provided with sliders, which are limited in the track 1001, thereby achieving sliding connection. When the first support 23, the second support 25 and the fourth support 36 slide to the set positions, the sliding blocks and the track 1001 can be fixed through bolts, and the first support 23, the second support 25 and the fourth support are prevented from being displaced when the first support 23, the second support 25 and the fourth support rotate at a high speed during testing. The fixed structure of the slider and the track 1001 is a conventional structure and will not be described in detail.

Example 4

As shown in fig. 4, on the basis of embodiment 3, the present embodiment is further provided with a lifting support mechanism; the lifting support mechanism comprises a lifting frame 41 and a roller 42; the lifting frame 41 is fixed on the workbench 100, and the roller 42 is rotationally fixed on the top of the lifting frame 41 and is positioned below the second vacuum tube 22. The lifting frame 41 comprises a cylinder 411 and a base 412; the cylinder seat of the air cylinder 411 is fixed on the workbench 100, the output end faces upwards, the base 412 is fixed at the output end, and the roller 42 is rotatably fixed on the upper surface of the base 412. In this embodiment, because the second vacuum tube 22 is long and has a large self-weight, the two lifting support mechanisms are provided, and when the second support 25 drives the second vacuum tube 22 to move, the roller is lifted to the lower part of the second vacuum tube 22 through the cylinder 411 to contact with the second vacuum tube 22, so that support is provided when the second vacuum tube 22 moves, and damage to the mounting structure of the second vacuum tube 22 and the second bearing 26 due to the fact that the second vacuum tube 22 is too long and too heavy (single cantilever structure) is avoided.

Example 5

On the basis of embodiment 4, this embodiment provides a test method:

step 1, pushing the second bracket 25 to drive the second vacuum tube 22 to be far away from the first bracket 23, so that the first mounting seat 222 is exposed; securing the rotating assembly within first mount 222;

the long-rod low-temperature valve 21, the third refrigerant passage 30 and the fourth refrigerant passage 40 are assembled, the heating assembly 31 and the temperature sensor 32 are installed on the third refrigerant passage 30, the above components are connected with the rotating assembly 1-2, the second support 25 is slowly pushed, the second vacuum tube 22 is close to the first support 23, the second vacuum tube 22 and the first mounting seat 222 are hermetically installed, meanwhile, the valve head of the long-rod low-temperature valve 21 penetrates out of the second mounting seat 223 and is sealed, and the transmission line of the temperature sensor 32 penetrates out of the second mounting seat 223, so that the installation of the M2 section is completed;

step 2, compressing the corrugated pipe 111, connecting the static assembly with an air inlet and outlet pipe, installing the heating assembly 31 and the temperature sensor 32 on the air inlet pipe 50, sealing and fixing the corrugated pipe 111 and the static assembly 1-1 after the connection is finished, and simultaneously sealing and connecting the pipe body 112 and a refrigerant supply device to form a vacuum side, so that M1 section installation is completed;

step 3, installing the motor 28, the flexible coupling, the output shaft and the like to finish M3 section installation;

step 4, moving the fourth bracket 36 to connect and fix the M2 and the M3 section (the output shaft is connected with the sleeve 27 by a bolt),

step 5, subsequently moving M2 and M3, slowly inserting the stationary component in M1 into the rotating component in M2, and then fixing the first support 23, the second support 25 and the fourth support 36 on the workbench 100 through bolts.

Step 6, vacuumizing the first vacuum chamber and the second vacuum chamber;

and 7, starting refrigerant supply, and starting a driving motor 28 to drive the second vacuum chamber, the long-rod low-temperature valve (21), the rotating assembly (1-2), the third refrigerant passage (30) and the fourth refrigerant passage (40) to rotate around the rotating shaft of the rotating assembly (1-2).

And 8, selecting proper heating power, starting heaters on the air inlet pipe (50) and the third refrigerant passage (30), reading the temperature difference between the two positions after the temperature of the system is stable, and calculating the transmission quantity and the transmission efficiency of the refrigerant transmission coupling device by using a temperature difference method so as to evaluate the refrigerant transmission coupling device.

And 9, reversely operating after the test is finished, and disassembling the refrigerant transmission coupling device.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.