Stabilizing tank and air suspension bearing air supply system, air conditioning unit

Abstract

The application provides a kind of steady pressure tank and gas suspension bearing gas supply system, air conditioning unit.Steady pressure tank includes shell;First piston;Second piston;Reset mechanism, the reset mechanism is arranged in the second buffer section.The steady pressure tank and gas suspension bearing gas supply system, air conditioning unit provided by the application, utilize first piston and second piston to produce two-stage buffer to the pressure pulsation of liquid supply pump, wherein utilize the buffer of gas to realize one-stage buffer, the buffer of reset mechanism realizes two-stage buffer, corresponding buffer is generated to different degree of pulse fluctuation, so as to realize the pressure and flow rate of liquid supply reach stable, solve the influence of regular fluctuation pulse of gear pump to liquid supply, the pressure chamber also has the function of saving simultaneously, by storing a certain amount of liquid can further alleviate the influence of pulse fluctuation to the pressure and flow rate of liquid supply, improve the stability and reliability of gas suspension bearing operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compression equipment, in particular to a pressure stabilizing tank, a gas suspension bearing gas supply system and an air conditioning unit. BACKGROUND

[0002] Due to the unique structure of the gas suspension centrifugal compressor, the compressor needs to supply liquid to its bearing in the normal operating state, and then the liquid refrigerant is changed into gaseous refrigerant through a throttling mechanism to supply the gas suspension bearing, so that the shaft is suspended in the air to run, thereby achieving the minimum energy consumption. However, the power drive of the liquid supply system relies on the refrigerant pump, and the refrigerant pump is a gear pump. The gear pump will produce periodic fluctuation pulses due to the meshing of the gear each time, which makes the liquid supply pressure and flow rate unstable, and further makes the gas suspension bearing unstable during operation, which is easy to cause hidden dangers or failures of the compressor. SUMMARY

[0003] In order to solve the technical problem of the instability of the liquid supply pressure and flow rate of the gas suspension bearing in the prior art, which causes hidden dangers or failures of the compressor, a pressure stabilizing tank and a gas suspension bearing gas supply system and an air conditioning unit are provided, which realize two-stage buffering by using a first piston and a second piston.

[0004] A pressure stabilizing tank, comprising:

[0005] a housing, wherein an inlet and an outlet are arranged on the housing;

[0006] a first piston, wherein the first piston is arranged in the housing, one side of the first piston and the housing form a pressure cavity, and the other side of the first piston and the housing form a buffer cavity, and the pressure cavity is in communication with the inlet and the outlet;

[0007] a second piston, wherein the second piston is arranged in the buffer cavity, and the second piston divides the buffer cavity into a first buffer section and a second buffer section;

[0008] a reset mechanism, wherein the reset mechanism is arranged in the second buffer section.

[0009] The first piston comprises a first partition plate and a first sealing ring, the first partition plate is movably arranged in the housing, one side of the first partition plate forms the pressure cavity, and the other side of the first partition plate forms the first buffer section, the first sealing ring is sleeved on the first partition plate, and the first sealing ring is located between the first partition plate and the housing.

[0010] The number of the first sealing rings is at least two, and all the first sealing rings are sleeved on the first partition plate side by side.

[0011] A first spacing is formed between the first partition plate and the housing, and the size of the first spacing ranges from 0.02mm to 0.03mm.

[0012] The second piston comprises a second partition plate and a second sealing ring, the second partition plate is movably arranged in the shell, one side of the second partition plate forms the first buffer section, and the other side forms the second buffer section, and the second sealing ring is sleeved on the second partition plate and located between the second partition plate and the shell.

[0013] A second spacing is formed between the second partition plate and the shell, and the size of the second spacing ranges from 0.03 mm to 0.04 mm.

[0014] The first piston comprises a first sealing ring, and the second piston comprises a second sealing ring, and the compression amount of the first sealing ring is greater than that of the second sealing ring.

[0015] The shell is provided with a gas communication port, and the gas communication port communicates with the first buffer section.

[0016] The inner wall of the shell is provided with a layer of lubricating material.

[0017] A gas suspension bearing gas supply system comprises the pressure stabilizing tank.

[0018] The gas suspension bearing gas supply system further comprises a refrigerant pump, and the refrigerant pump communicates with the liquid taking port of the condenser and the inlet of the shell.

[0019] The gas suspension bearing gas supply system is applied to a refrigerant heat exchange cycle, the refrigerant heat exchange cycle comprises a compressor and a condenser, the compressor is provided with a gas suspension bearing, the inlet of the shell communicates with the liquid taking port of the condenser through the refrigerant pump, and the outlet of the shell communicates with the gas suspension bearing.

[0020] An air conditioning unit comprises the pressure stabilizing tank or the gas suspension bearing gas supply system.

[0021] The pressure stabilizing tank, the gas suspension bearing gas supply system and the air conditioning unit provided by the application utilize the first piston and the second piston to perform two-stage buffering on the pressure pulsation generated by the liquid supply pump, wherein the first-stage buffering is realized by the buffering of the gas, and the second-stage buffering is realized by the buffering of the reset mechanism, corresponding buffering is generated on different degrees of pulse fluctuation, so that the pressure and flow rate of the liquid supply are stabilized, the influence of the regular fluctuation pulse of the gear pump on the liquid supply is solved, and the pressure cavity also has a storage function, the influence of the pulse fluctuation on the pressure and flow rate of the liquid supply is further relieved by storing a certain amount of liquid, and the stability and reliability of the operation of the gas suspension bearing are improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The structure diagram of the pressure stabilizing tank provided by the embodiment of the application is shown.

[0023] Figure 2 Structure diagram of air supply system of air suspension bearing provided by the embodiment of the present application is shown in the figure.

[0024] In the figure:

[0025] 1, housing; 11, inlet; 12, outlet; 2, first piston; 13, pressure cavity; 3, second piston; 14, first buffer section; 15, second buffer section; 21, first partition; 22, first sealing ring; 31, second partition; 32, second sealing ring; 16, gas communication port; 4, reset mechanism; 5, refrigerant pump; 6, compressor; 7, condenser; 8, evaporator. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0027] As shown in the pressure stabilizing tank shown in Figure 1 and Figure 2 , comprising: a housing 1, the housing 1 is provided with an inlet 11 and an outlet 12; a first piston 2, the first piston 2 is arranged in the housing 1, and one side of the first piston 2 and the housing 1 form a pressure cavity 13, and the other side of the first piston 2 and the housing 1 form a buffer cavity, the pressure cavity 13 is in communication with the inlet 11 and the outlet 12; a second piston 3, the second piston 3 is arranged in the buffer cavity, and the second piston 3 divides the buffer cavity into a first buffer section 14 and a second buffer section 15 in a direction away from the first piston 2; a reset mechanism 4, the reset mechanism 4 is arranged in the second buffer section 15; the first buffer section 14 is provided with gas. The pressure pulsation generated by the liquid supply pump is buffered by the first piston 2 and the second piston 3, wherein the first buffer section 14 is provided with gas, and the buffer of the reset mechanism 4 realizes the second buffer, and the corresponding buffer is generated for different degrees of pulse fluctuation, so as to realize the stability of the pressure and flow rate of the liquid supply, solve the influence of the regular fluctuation pulse of the gear pump on the liquid supply, and the pressure cavity 13 also has a storage function, by storing a certain amount of liquid, the influence of the pulse fluctuation on the pressure and flow rate of the liquid supply can be further relieved, and the stability and reliability of the air suspension bearing operation are improved.

[0028] The pet, the inlet 11 of the pressure stabilizing tank is communicated with the refrigerant pump. When the refrigerant pump works, pressure pulsation is generated. When the pressure of the liquid refrigerant sent into the pressure stabilizing tank increases, the first piston 2 moves under the action of the pressure. At this time, the volume of the pressure cavity 13 increases, so that the pressure in the pressure cavity 13 decreases, the effect of stabilizing the pressure in the pressure cavity 13 is realized, and the first piston 2 extrudes the gas in the first buffer section 14, so that the pressure change in the pressure cavity 13 is converted into the pressure change of the gas. When the pressure in the pressure cavity 13 further increases, the gas continues to be compressed, the volume of the pressure cavity 13 further increases, and the second piston 3 moves under the driving of the compressed gas, so that the reset mechanism 4 is extruded, the reset mechanism 4 also deforms to absorb part of the pressure, so that the pressure stabilizing tank can absorb larger pressure, and the stability of the gas suspension bearing connected with the outlet 12 of the pressure stabilizing tank is ensured.

[0029] When the pressure of the liquid refrigerant sent into the pressure stabilizing tank decreases, the compressed gas in the first buffer section 14 releases pressure and drives the first piston 2 to move, the volume of the pressure cavity 13 decreases, so that the pressure in the pressure cavity 13 increases. When the pressure further decreases, the reset mechanism 4 begins to restore to its original state and drives the second piston 3 to move, so that the pressure is transmitted to the gas in the first buffer section 14, the first piston 2 can further move to ensure the pressure in the pressure cavity 13, and the stability of the gas suspension bearing connected with the outlet 12 of the pressure stabilizing tank is ensured.

[0030] Preferably, the reset mechanism 4 is a spring. When the second piston 3 moves away from the pressure cavity 13, the spring is compressed. When the second piston 3 moves towards the pressure cavity 13, the spring begins to restore to its original state.

[0031] Specifically, the first piston 2 includes a first partition plate 21 and a first sealing ring 22. The first partition plate 21 is movably arranged in the shell 1, one side of the first partition plate 21 forms the pressure cavity 13, and the other side forms the first buffer section 14. The first sealing ring 22 is sleeved on the first partition plate 21, and the first sealing ring 22 is located between the first partition plate 21 and the shell 1. Because there is a gap between the first partition plate 21 and the shell 1, a first gap is formed. In order to ensure the sealing effect between the pressure cavity 13 and the first buffer section 14, the first sealing ring 22 is used to close the first gap between the first partition plate 21 and the shell 1, so as to avoid the mixing of the gas and the liquid refrigerant in the first buffer section 14, which affects the efficiency of the air conditioning unit, and also avoid the liquid refrigerant entering the first buffer section 14, which causes the liquid refrigerant in the first buffer section 14 to be unable to be compressed, thereby affecting the buffering effect of the first buffer section 14.

[0032] The first interval is generally 0.02mm to 0.03mm. The thickness of the first sealing ring 22 is greater than 0.03mm to ensure that the first sealing ring 22 reliably seals the first interval.

[0033] Optionally, the first partition plate 21 is provided with an annular groove, and the first sealing ring 22 is arranged in the annular groove to be fixed, so that the movement of the first piston 2 does not cause the first sealing ring 22 to separate from the first partition plate 21. At this time, the thickness of the first sealing ring 22 is greater than the sum of the depth of the annular groove and the size of the first interval.

[0034] To further improve the sealing effect of the first piston 2 and the shell 1, the number of the first sealing ring 22 is at least two, and all the first sealing rings 22 are arranged side by side on the first partition plate 21.

[0035] Similarly, the second piston 3 includes a second partition plate 31 and a second sealing ring. The second partition plate 31 is movably arranged in the shell 1, and one side of the second partition plate 31 forms the first buffer section 14, and the other side forms the second buffer section 15. The second sealing ring is arranged on the second partition plate 31, and the second sealing ring is located between the second partition plate 31 and the shell 1. Because there is a gap between the second partition plate 31 and the shell 1, a second interval is formed. In order to ensure the sealing effect of the second piston 3 between the first buffer section 14 and the second buffer section 15, the second sealing ring is used to seal the second interval between the second partition plate 31 and the shell 1, so that the liquid refrigerant in the first buffer section 14 does not enter the second buffer section 15 to affect the deformation effect of the reset mechanism 4, and the reliable deformation of the reset mechanism 4 is ensured.

[0036] The size of the second interval is 0.03mm to 0.04mm. The thickness of the second sealing ring is greater than 0.04mm to ensure that the second sealing ring reliably seals the second interval.

[0037] Optionally, the second partition plate 31 is provided with an annular groove, and the second sealing ring 32 is arranged in the annular groove to be fixed, so that the movement of the second piston 3 does not cause the second sealing ring 32 to separate from the second partition plate 31. At this time, the thickness of the second sealing ring 32 is greater than the sum of the depth of the annular groove and the size of the second interval.

[0038] As an embodiment, the first piston 2 includes a first sealing ring 22, and the second piston 3 includes a second sealing ring. The first sealing ring 22 is used to separate the liquid refrigerant and the gas, and the second sealing ring can ensure the operation of the pressure stabilizing tank even if there is gas leakage. The compression amount of the first sealing ring 22 is greater than the compression amount of the second sealing ring.

[0039] Preferably, the compression amount of the first sealing ring 22 and the second sealing ring is between 12% and 18%, in which range, the first sealing ring 22 and the second sealing ring can obtain better sealing effect, and the greater the compression amount, the better the sealing effect, thus, the compression amount of the first sealing ring 22 can be selected as 18%, and the compression amount of the second sealing ring can be selected as 12%.

[0040] The shell 1 is provided with a gas communication port 16, which communicates with the first buffer section 14. The gas communication port 16 is used to supplement or discharge gas into the first buffer section 14. Preferably, the gas is air.

[0041] The inner wall of the shell 1 is provided with a layer of lubricating material. The friction between the first piston 2 and the second piston 3 and the shell 1 is reduced, so as to improve the response speed of the first piston 2 and the second piston 3 to pressure, and further improve the pressure stabilizing effect of the pressure stabilizing tank.

[0042] A gas suspension bearing gas supply system comprising the above pressure stabilizing tank.

[0043] The gas suspension bearing gas supply system further comprises a refrigerant pump 5, which communicates with the liquid taking port of the condenser 7 and the inlet 11 of the shell 1. The refrigerant pump 5 is used to pump liquid refrigerant into the pressure stabilizing tank.

[0044] The gas suspension bearing gas supply system is applied to a refrigerant heat exchange cycle, which comprises a compressor 6 and a condenser 7, the compressor 6 is provided with a gas suspension bearing, the inlet 11 of the shell 1 communicates with the liquid taking port of the condenser 7, and the outlet 12 of the shell 1 communicates with the gas suspension bearing. The liquid refrigerant in the condenser 7 enters the pressure stabilizing tank under the action of the refrigerant pump 5, and is sent to the gas suspension bearing in the compressor 6 through the pressure stabilizing tank, so as to ensure the stable and safe operation of the gas suspension bearing.

[0045] Specifically, the refrigerant heat exchange cycle further comprises an evaporator 8, which communicates with the condenser 7 and the compressor 6 in sequence.

[0046] An air conditioning unit comprising the above pressure stabilizing tank or the above gas suspension bearing gas supply system.

[0047] The above embodiments only express several embodiments of the present application, which are described in detail and specifically, but cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.

Claims

1. A pressure stabilizing tank characterized by: The utility model relates to a kind of gas suspension bearing gas supply systems, including: Shell (1), which is provided with an inlet (11) and an outlet (12) on the shell (1); A first piston (2) is arranged in the shell (1), and one side of the first piston (2) forms a pressure chamber (13) with the shell (1), and the other side forms a buffer chamber with the shell (1). The pressure chamber (13) is in communication with the inlet (11) and the outlet (12). A second piston (3) is arranged in the buffer chamber, and the second piston (3) divides the buffer chamber into a first buffer section (14) and a second buffer section (15). A reset mechanism (4) is arranged in the second buffer section (15), and the reset mechanism (4) can drive the second piston (3) to move. The first piston (2) includes a first sealing ring (22), and the second piston (3) includes a second sealing ring. The inner wall of the shell (1) is provided with a layer of lubricating material.

2. The pressure tank of claim 1, wherein: The first piston (2) includes a first partition (21) and a first sealing ring (22), the first partition (21) is movably arranged in the shell (1), and one side of the first partition (21) forms the pressure chamber (13), and the other side forms the first buffer section (14). The first sealing ring (22) is sleeved on the first partition (21), and the first sealing ring (22) is located between the first partition (21) and the shell (1).

3. The pressure tank of claim 2, wherein: The number of the first sealing ring (22) is at least two, and all the first sealing rings (22) are sleeved on the first partition (21).

4. The pressure tank of claim 2, wherein: The first partition (21) and the shell (1) form a first spacing, and the size of the first spacing ranges from 0.02mm to 0.03mm.

5. The pressure tank of claim 1, wherein: The second piston (3) includes a second partition (31) and a second sealing ring, the second partition (31) is movably arranged in the shell (1), and one side of the second partition (31) forms the first buffer section (14), and the other side forms the second buffer section (15). The second sealing ring is sleeved on the second partition (31), and the second sealing ring is located between the second partition (31) and the shell (1).

6. The pressure tank of claim 5, wherein: The second partition (31) and the shell (1) form a second spacing, and the size of the second spacing ranges from 0.03mm to 0.04mm.

7. The pressure tank of claim 1, wherein: The compression amount of the first sealing ring (22) is greater than the compression amount of the second sealing ring.

8. The pressure tank of claim 1, wherein: The shell (1) is provided with a gas communication port (16), and the gas communication port (16) is in communication with the first buffer section (14).

9. An air gas bearing supply system characterized by: The utility model relates to a kind of gas suspension bearing gas supply systems, including:

10. The gas foil bearing gas supply system of claim 9, wherein: The gas suspension bearing gas supply system further comprises a refrigerant pump (5), and the refrigerant pump (5) is in communication with the inlet (11) of the shell (1).

11. The gas foil bearing gas supply system of claim 10, wherein: The air-suspension bearing gas supply system is applied to a refrigerant heat exchange cycle, the refrigerant heat exchange cycle comprises a compressor (6) and a condenser (7), the compressor (6) is provided with an air-suspension bearing, an inlet (11) of the shell (1) is communicated with a liquid taking port of the condenser (7) through the refrigerant pump (5), and an outlet (12) of the shell (1) is communicated with the air-suspension bearing.

12. An air conditioning unit characterized by: A pressure stabilizing tank according to any one of claims 1 to 8 or an air-suspension bearing gas supply system according to any one of claims 9 to 11.

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