Compressor system and control method thereof

Abstract

The invention provides a compressor system and a control method thereof. The compressor system comprises a compressor and a bearing air supply assembly. The compressor comprises a motor cavity and a compression cavity which are separated from each other, a main shaft penetrating through the motor cavity and the compression cavity, and an air bearing located in the motor cavity and arranged on the main shaft in a sleeving mode. The bearing air supply assembly comprises an evaporation part for evaporating liquid water into vaporous water, a water supply pipeline for conveying the liquid water to the evaporation part, and an air supply pipeline connected between the evaporation part and the compressor, and the air supply pipeline guides the vaporous water to the motor cavity so as to support the air bearing; according to the water vapor centrifugal compressor, air used for supporting operation of the air bearing in a traditional water vapor centrifugal compressor is replaced with vaporous water, and the problem that due to the fact that the air used for supporting operation of the air bearing carries various impurities, parts such as the air bearing are damaged is effectively solved.

Description

Technical Field

[0001] This invention belongs to the field of compressors, and more specifically, relates to a compressor system and its control method. Background Technology

[0002] In the bearing air supply system of a steam compressor, the cleanliness of the supplied air is one of the key factors in ensuring the stable operation of the air bearing and extending its service life. In existing technology, the bearing air supply for a steam compressor is provided by compressing ordinary external air using an air compressor. The compressed air flowing from the air compressor's exhaust port is delivered to the air bearing of the steam compressor via radial and axial intake pipes, providing support for the compressor's air bearing.

[0003] However, during the compression of air by an air compressor, various components in the air may undergo physical or chemical changes, resulting in impurities such as moisture and dust particles. If these impurities enter the air bearing of the steam compressor directly without treatment, they will damage the air bearing during operation, thereby shortening its service life. Summary of the Invention

[0004] The purpose of this invention is to provide a compressor system and its control method to solve the problem in the prior art where the air used to support the operation of the air bearing causes damage to the air bearing and other components due to carrying various impurities.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] In a first aspect, the present invention provides a compressor system, comprising:

[0007] The compressor includes a motor chamber and a compression chamber separated from each other, a main shaft passing through the motor chamber and the compression chamber, and an air bearing located in the motor chamber and sleeved on the main shaft;

[0008] The bearing air supply assembly includes an evaporation component that evaporates liquid water into gaseous water, a water supply pipeline that supplies liquid water to the evaporation component, and an air supply pipeline that connects the evaporation component and the compressor. The air supply pipeline leads the gaseous water to the motor cavity to support the air bearing.

[0009] Furthermore, it also includes:

[0010] The compressor cooling assembly includes a cooling component that cools the gaseous water into liquid water, a water inlet pipe connected between the evaporation component and the cooling component, and a cooling water pipe connected between the cooling component and the compressor. The water inlet pipe leads the liquid water to the motor cavity or the compression cavity to cool the compressor.

[0011] Furthermore, a spray element is provided on the cooling water pipeline, which sprays the liquid water into the compression chamber in a mist form.

[0012] Furthermore, a first pump body is provided on the gas supply pipeline, a second pump body is provided on the water intake pipeline, and a third pump body is provided on the cooling water pipeline.

[0013] Furthermore, the water supply pipeline is equipped with a water storage tank for storing the liquid water, and the compressor system further includes:

[0014] A return pipeline is connected between the compressor and the water storage tank to direct the liquid water that has cooled the compressor to the water storage tank.

[0015] Furthermore, the water supply pipeline includes a first water supply pipe section and a second water supply pipe section. The first water supply pipe section is connected between the water source side and the water storage tank, and the second water supply pipe section is connected between the water storage tank and the evaporation component. The first water supply pipe section is equipped with a first valve, and the second water supply pipe section is equipped with a second valve.

[0016] Furthermore, the evaporator component is equipped with a heat exchange tube, and the compressor system further includes:

[0017] The steam inlet pipe and the steam outlet pipe are both connected to the compression chamber. The steam inlet pipe delivers water vapor to be compressed to the compressor, and the steam outlet pipe leads the water vapor compressed by the compressor to the user side.

[0018] The diversion pipeline includes a first diversion section and a second diversion section. The first diversion section is connected between the steam outlet pipeline and the heat exchange tube, and the second diversion section is connected between the heat exchange tube and the steam inlet pipeline.

[0019] Furthermore, a third valve is provided on the steam inlet pipe, a fourth valve is provided on the steam outlet pipe, a fifth valve is provided on the first diversion pipe section, and a sixth valve is provided on the second diversion pipe section.

[0020] Furthermore, the evaporation component includes an evaporator and an electric heater disposed on the evaporator.

[0021] Secondly, the present invention also provides a control method for a compressor system, wherein the compressor system is as described above, comprising:

[0022] Obtain the compressor temperature and determine whether the compressor temperature is within the preset compression temperature range;

[0023] When the compressor temperature is higher than the upper limit of the preset compression temperature range, the opening of the valve on the water supply pipeline is increased;

[0024] When the compressor temperature is lower than the lower limit of the preset compression temperature range, the opening of the valve on the water supply pipeline is reduced.

[0025] Furthermore, it also includes:

[0026] When the compressor temperature is higher than the upper limit of the preset compression temperature range, the opening of the valve on the diversion pipeline is increased, or the opening of the pump body on the water inlet pipeline and the cooling water pipeline is increased.

[0027] When the compressor temperature is lower than the lower limit of the preset compression temperature range, the opening of the valve on the diversion pipeline is also reduced, or the opening of the pump body on the main water intake pipeline and the cooling water pipeline is also reduced.

[0028] Compared with the prior art, the beneficial effects of the compressor system and control method provided by the present invention are as follows: The present invention purifies liquid water from tap water sources and then introduces the purified gaseous water into the compressor to provide support for the air bearing and ensure its normal operation; thereby replacing the air used to support the operation of the air bearing in the traditional steam centrifugal compressor with gaseous water, effectively solving the problem of damage to the air bearing and other components caused by various impurities carried by the air used to support the operation of the air bearing. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the overall structure of the compressor system in this invention;

[0031] Figure 2 This is a schematic diagram of a partial structure of the compressor system in this invention. Figure 1 ;

[0032] Figure 3 This is a schematic diagram of a partial structure of the compressor system in this invention. Figure 2 ;

[0033] Figure 4 This is a schematic diagram of a partial structure of the compressor system in this invention. Figure 3 ;

[0034] The main markings in the attached figures are as follows:

[0035] 11. Compressor; 12. Evaporator; 121. Evaporator tank; 122. Electric heater; 13. Cooling component;

[0036] 21. Water supply pipeline; 211. First water supply pipeline section; 212. Second water supply pipeline section; 22. Gas supply pipeline; 23. Water intake pipeline; 24. Cooling water pipeline; 25. Return pipeline; 26. Steam inlet pipeline; 27. Steam outlet pipeline; 28. Diversion pipeline; 281. First diversion pipeline section; 282. Second diversion pipeline section;

[0037] 31. Spraying components; 32. Water storage tank;

[0038] 41. First pump body; 42. Second pump body; 43. Third pump body;

[0039] 51. First valve; 52. Second valve; 53. Third valve; 54. Fourth valve; 55. Fifth valve; 56. Sixth valve. Detailed Implementation

[0040] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0041] In the bearing air supply system of a steam compressor, the cleanliness and stability of the supplied air pressure are key factors in maintaining the stable operation of the air bearing and ensuring its service life. In existing technology, the bearing air supply for steam compressors is provided by compressing ordinary external air using an air compressor. The compressed air discharged from the air compressor's exhaust port flows to the air bearing of the steam compressor through both radial and axial intake pipes, providing support for the air bearing. On the one hand, during the compression process of the air by the air compressor, various components in the air may undergo physical or chemical changes, forming various impurities such as moisture and dust particles. If these impurities enter the air bearing of the steam compressor directly without treatment, they will damage the air bearing during operation, thus shortening its service life. On the other hand, the compressed air pressure provided by the air compressor is not stable, which can lead to unstable operation of the air bearing, causing damage and also shortening its service life.

[0042] Furthermore, the water required for the compressor's internal steam spray cooling, as well as the makeup water for the circulating cooling water required for the motor's external cooling, both come from externally supplied tap water. Because filters cannot remove dissolved calcium and magnesium ions and other metal cations from the water, the filtered cooling water is not highly pure and still contains these ions. On one hand, in the motor's external cooling system, these dissolved ions easily form scale on the surface of the air bearing, reducing the motor's cooling effect and increasing the cooling load. On the other hand, in the compressor's internal steam spray cooling system, the cooling spray containing calcium and magnesium ions mixes with the steam inside the unit, reducing the steam's purity and affecting the user experience after steam output.

[0043] Based on the above situation, in order to solve the above series of problems, the present invention proposes a new compressor system and its control method.

[0044] like Figure 1 , Figure 2 As shown, the compressor system provided by the present invention includes at least a compressor 11 and a bearing air supply assembly; wherein, the compressor 11 includes a motor cavity and a compression cavity separated from each other, a main shaft passing through the motor cavity and the compression cavity, and an air bearing located in the motor cavity and sleeved on the main shaft; the bearing air supply assembly includes an evaporation component 12 for evaporating liquid water into gaseous water, a water supply pipe 21 for supplying liquid water to the evaporation component 12, and an air supply pipe 22 connected between the evaporation component 12 and the compressor 11, the air supply pipe 22 leading the gaseous water to the motor cavity to support the air bearing.

[0045] It should be understood that the compressor 11 has a motor chamber and a compression chamber, which are separated from each other to prevent mutual interference. The motor chamber is mainly used to install motor-related components, such as motor magnets, the main shaft, and air bearings. The compression chamber is mainly used to install components for compressing steam, such as the impeller. Therefore, the air bearing is located in the motor chamber, the main body of the main shaft is located in the motor chamber, and the output part of the main shaft is located in the compression chamber and connected to the impeller, thereby driving the impeller to rotate. Compared to the main body of the main shaft, the output part of the main shaft can be thinner. The end of the impeller away from the motor chamber can be fixed to the output part of the main shaft with threaded fasteners to prevent axial movement.

[0046] The bearing air supply assembly of this invention comprises an evaporator 12, a water supply pipe 21, and an air supply pipe 22. The water supply pipe 21 delivers liquid water from a water source (tap water) to the evaporator 12. The evaporator 12 converts the liquid water into gaseous water through electric heating or other methods, achieving separation of the gaseous water from impurities in the liquid water. Impurities remain in the evaporator 12 and do not participate in system operation; they are removed during unit maintenance. The gaseous water, converted into pure gas, is then supplied to the compressor 11 through the air supply pipe 22 to provide support for the air bearing and ensure its normal operation.

[0047] Therefore, this invention replaces the air used to support the operation of the air bearing in a traditional steam centrifugal compressor with gaseous water, effectively solving the problem of damage to the air bearing and other components caused by various impurities carried by the air used to support the air bearing. First, the liquid water from a tap water source is purified, and then the purified gaseous water is introduced into the compressor 11 to maintain the normal operation of the unit. Even if the purified gaseous water mixes into the unit from the air bearing, it will not cause damage to the unit due to carrying various impurities, unlike the air used in the prior art to support the air bearing, thus reducing the probability of unit failure.

[0048] like Figure 1 , Figure 3 As shown, the compressor system also includes a compressor cooling assembly. The compressor cooling assembly includes a cooling component 13 that cools gaseous water into liquid water, a water inlet pipe 23 connected between the evaporator component 12 and the cooling component 13, and a cooling water pipe 24 connected between the cooling component 13 and the compressor 11. The water inlet pipe 23 leads liquid water to the motor cavity or the compression cavity to cool the compressor 11.

[0049] The compressor cooling assembly of the present invention comprises a cooling component 13, a water inlet pipe 23, and a cooling water pipe 24. The water inlet pipe 23 transports gaseous water from the evaporation component 12 to the cooling component 13. The cooling component 13 converts the gaseous water into liquid water free of impurities through methods such as air cooling. The liquid water is then introduced into the compressor 11 through the cooling water pipe 24 to cool the compressor 11.

[0050] It should be understood that a device for diverting the liquid water from the cooling water pipe 24 can be installed inside the compressor 11. A portion of the liquid water is introduced into the motor cavity to cool motor-related components such as the air bearing, which helps improve the sustainability and stability of the compressor 11; another portion of the liquid water is introduced into the compression chamber to cool the water vapor compressed by the compressor 11, enabling the temperature of the water vapor compressed by the compressor 11 to better meet the user's needs.

[0051] Therefore, this invention can also condense purified gaseous water into liquid water to cool the inside of the compressor 11, thereby reducing the probability of unit failure. This effectively solves the problem caused by the external supply of tap water for both the internal steam spray cooling water of the compressor 11 and the circulating cooling water required for the external cooling of the motor. Specifically, in the external cooling system of the motor, metal cations such as calcium and magnesium ions dissolved in the water easily form scale on the surface of the air bearing, thereby reducing the cooling effect of the motor and increasing the cooling load on the motor. In the internal steam spray cooling system of the compressor 11, the cooling spray containing metal cations such as calcium and magnesium ions, after mixing with the steam inside the unit, also reduces the purity of the steam, affecting the user's use after the steam is output.

[0052] like Figure 3 As shown, a spray element 31 is provided on the cooling water pipe 24, which sprays liquid water into the compression chamber in a mist.

[0053] This invention incorporates a spray element 31 on the cooling water pipe 24. The spray element 31 sprays liquid water in a mist form onto the high-temperature steam inside the compression chamber. The atomized liquid water mixes thoroughly with the high-temperature steam, effectively cooling the steam and improving the cooling effect. The cooled high-temperature steam is then discharged from the outlet of the compressor 11. It should be understood that the proportion of liquid water spray in the mixed high-temperature steam is relatively low, only cooling the high-temperature steam inside the unit, thus ensuring that the high-temperature steam supplied to the user meets the temperature requirements.

[0054] like Figure 3 As shown, the gas supply pipeline 22 is equipped with a first pump body 41, the water supply pipeline 23 is equipped with a second pump body 42, and the cooling water pipeline 24 is equipped with a third pump body 43.

[0055] This invention enables precise control of the flow rate and speed of fluids (gas-water or liquid-water) in different pipelines by activating the first pump 41 to deliver gaseous water from the evaporation component 12 to the compressor 11, activating the second pump 42 to deliver gaseous water from the evaporation component 12 to the cooling component 13, and activating the third pump 43 to deliver liquid-water from the evaporation component 12 to the compressor 11. The first pump 41 can stably deliver an appropriate amount of gaseous water to the motor cavity within the compressor 11 according to the gaseous water requirements of the air bearing, providing reliable support for the air bearing. The second pump 42 can precisely deliver a certain amount of gaseous water from the evaporation component 12 to the cooling component 13 according to the cooling requirements of the compressor's cooling components, ensuring that the cooling component 13 has sufficient gaseous water for cooling conversion. The third pump 43 can deliver the liquid-water converted from the cooling component 13 to the compressor 11 as needed according to the cooling requirements of different parts within the compressor 11, achieving effective cooling of various parts of the compressor 11. This precise control of fluid delivery further improves the operating efficiency and stability of the entire compressor system, reduces potential malfunctions caused by improper fluid delivery, and ensures that the compressor system can provide users with high-temperature steam that meets requirements in a long-term and stable manner.

[0056] In practical applications, by continuously drawing the evaporated gaseous water from the evaporation component 12 through the first pump body 41 and the second pump body 42, the gas pressure inside the evaporation component 12 can be reduced, thereby improving the efficiency of converting tap water into gas.

[0057] like Figure 1 , Figure 3 As shown, the water supply pipeline 21 is equipped with a water storage tank 32 for storing liquid water. The compressor system also includes a return pipeline 25, which is connected between the compressor 11 and the water storage tank 32 to guide the liquid water after cooling the compressor 11 to the water storage tank 32.

[0058] This invention achieves the recycling of liquid water by setting up a water storage tank 32 and a return pipeline 25. When the compressor 11 is running, the liquid water used to cool various parts of the compressor 11 is returned to the water storage tank 32 through the return pipeline 25. This returned liquid water can be reused in the water storage tank 32, for example, by being transported to the evaporation unit 12 through a corresponding pump or valve. This recycling method not only effectively saves water resources and reduces operating costs, but also mitigates the potential environmental impact of discharging cooling water, further improving the environmental friendliness and economy of the compressor system.

[0059] like Figure 4As shown, the water supply pipeline 21 includes a first water supply pipeline section 211 and a second water supply pipeline section 212. The first water supply pipeline section 211 is connected between the water source side and the water storage tank 32, and the second water supply pipeline section 212 is connected between the water storage tank 32 and the evaporation component 12. A first valve 51 is provided on the first water supply pipeline section 211, and a second valve 52 is provided on the second water supply pipeline section 212.

[0060] In practical applications, both the first valve 51 and the second valve 52 can be butterfly valves. Butterfly valves have advantages such as simple structure, small size, light weight, material saving, small installation size, rapid opening and closing, low driving torque, simple and quick operation, and good fluid control characteristics.

[0061] By installing a first valve 51 in the first water supply pipe section 211 and a second valve 52 in the second water supply pipe section 212, the present invention can more accurately control the flow rate and direction of liquid water in the first water supply pipe section 211 and the second water supply pipe section 212, ensuring the stable and efficient operation of the compressor system and meeting the demand for liquid water supply under different working conditions.

[0062] like Figure 4 As shown, the evaporator 12 is equipped with heat exchange tubes, and the compressor system also includes an inlet steam pipe 26, an outlet steam pipe 27, and a branch pipe 28. The inlet steam pipe 26 and the outlet steam pipe 27 are both connected to the compression chamber. The inlet steam pipe 26 delivers water vapor to be compressed to the compressor 11, and the outlet steam pipe 27 leads the water vapor compressed by the compressor 11 to the user side. The branch pipe 28 includes a first branch pipe section 281 and a second branch pipe section 282. The first branch pipe section 281 is connected between the outlet steam pipe 27 and the heat exchange tubes, and the second branch pipe section 282 is connected between the heat exchange tubes and the inlet steam pipe 26.

[0063] This invention enables externally supplied steam to be introduced into the compressor 11 through the steam inlet pipe 26. Under the action of the compressor 11, the steam is processed into high-temperature and high-pressure steam, which is then supplied to the user through the steam outlet pipe 27. Furthermore, a heat exchange tube is installed inside the evaporator 12, and a branch pipe 28 is provided connecting the heat exchange tube, the steam inlet pipe 26, and the steam outlet pipe 27. When the high-temperature and high-pressure steam is discharged from the compressor 11, a portion of the steam is intercepted from the steam outlet pipe 27 and introduced into the heat exchange tube inside the evaporator 12 through the first branch pipe section 281, and then led to the steam inlet pipe 26 through the second branch pipe section 282. This portion of steam, together with the evaporator 12, heats the tap water inside the heat exchange tube, thereby reducing electricity consumption.

[0064] like Figure 4 As shown, a third valve 53 is provided on the steam inlet pipe 26, a fourth valve 54 is provided on the steam outlet pipe 27, a fifth valve 55 is provided on the first branch pipe section 281, and a sixth valve 56 is provided on the second branch pipe section 282.

[0065] In practical applications, butterfly valves can be selected for the third valve 53 and the fourth valve 54, while electronic expansion valves can be selected for the fifth valve 55 and the sixth valve 56. Butterfly valves have advantages such as simple structure, small size, light weight, and convenient operation, and can well meet the basic valve requirements of the steam inlet pipe 26 and the steam outlet pipe 27, achieving effective control over the flow of steam. Electronic expansion valves, on the other hand, have high-precision flow regulation capabilities. By precisely controlling the opening of the fifth valve 55 and the sixth valve 56, the flow rate of steam entering the heat exchange tubes inside the evaporator 12 can be accurately adjusted, thereby better controlling the process of heating tap water together with the evaporator 12, achieving a more ideal effect of reducing power consumption.

[0066] The evaporation component 12 includes an evaporator 121 and an electric heater 122 disposed on the evaporator 121. The cooling component 13 includes a cooling box and an air-cooled refrigeration unit disposed on the cooling box.

[0067] The evaporator 121, as the core of the evaporation component 12, can fully accommodate tap water and provide ample space for evaporation, ensuring the smooth generation of gaseous water. An electric heater 122 is installed at a specific location in the evaporator 121, converting electrical energy into heat energy to heat the tap water inside, thereby generating water vapor. The cooling box, as the core of the cooling component 13, has an air-cooled chiller installed on top. Airflow carries away heat, achieving rapid cooling of the gaseous water inside the cooling box, thus ensuring the entire compressor system operates under stable and efficient conditions.

[0068] In addition, temperature sensors can be installed inside the compressor 11 and the evaporator 121, and a pressure sensor can be installed inside the evaporator 121. Based on the data measured by each sensor, corresponding control can be performed on each valve, each pump, the electric heater 122, and the air-cooled chiller in the entire compressor system.

[0069] Based on the specific structure of the aforementioned compressor system, the compressor system control method provided by the present invention includes the following steps:

[0070] Obtain the compressor temperature and determine whether the compressor temperature is within the preset compression temperature range;

[0071] When the compressor temperature exceeds the upper limit of the preset compression temperature range, increase the opening of the valve on the water supply pipeline;

[0072] When the compressor temperature is lower than the lower limit of the preset compression temperature range, reduce the opening of the valve on the water supply pipeline.

[0073] This invention can precisely adjust the opening of the valve on the water supply pipeline according to the actual temperature of the compressor, achieving energy saving while ensuring effective support for the air bearing. Specifically, if the compressor temperature is too high, increasing the opening of the valve on the water supply pipeline can accelerate the supply of liquid water to the evaporator, thereby delivering more gaseous water to the compressor and better supporting the air bearing; conversely, if the compressor temperature is too low, decreasing the opening of the valve on the water supply pipeline can slow down the supply of liquid water to the evaporator, reducing the amount of gaseous water delivered to the compressor, thus achieving energy saving.

[0074] In addition, the control method for the compressor system also includes the following steps:

[0075] When the compressor temperature is higher than the upper limit of the preset compression temperature range, the opening of the valve on the diversion pipeline is increased, or the opening of the pump body on the water inlet pipeline and cooling water pipeline is increased.

[0076] When the compressor temperature is lower than the lower limit of the preset compression temperature range, the opening of the valve on the diversion pipeline is also reduced, or the opening of the pump body on the main water intake pipeline and cooling water pipeline is also reduced.

[0077] This invention can precisely adjust the opening of valves on the distribution pipe and the pump openings on the water inlet and cooling water pipes according to the actual temperature of the compressor. This ensures effective cooling of the compressor while achieving energy savings, thereby improving the reliability of the compressor. Specifically, when the compressor temperature is too high, increasing the opening of the valves on the distribution pipe accelerates the acquisition of pure gaseous water for cooling; increasing the opening of the pumps (i.e., their inlet and outlet valves) on the water inlet and cooling water pipes accelerates the cooling of the air bearings and other components inside the compressor. Conversely, when the compressor temperature is too low, decreasing the opening of the valves on the distribution pipe slows down the acquisition of pure gaseous water for cooling; decreasing the opening of the pumps (i.e., their inlet and outlet valves) on the water inlet and cooling water pipes avoids over-cooling of the air bearings and other components inside the compressor, thus achieving energy savings.

[0078] In addition, by combining the compressor temperature, evaporator temperature and pressure, more precise control can be exercised over the various valves, pumps and air-cooled chillers in the entire compressor system.

[0079] In practical applications, such as Figures 1 to 4As shown, when the temperature sensor of compressor 11 detects that the temperature is higher than a preset threshold, the opening degree of the first valve 51 and the second valve 52 will increase, thereby accelerating the speed of tap water intake. Simultaneously, based on the data measured by the temperature and pressure sensors inside the evaporator tank 121, the opening degree of the fifth valve 55 and the sixth valve 56 will increase to accelerate the flow rate of high-temperature, high-pressure water vapor inside compressor 11; the opening degree of the second pump body 42 will increase, increasing the cooling power of the air-cooled chiller, thereby accelerating the acquisition speed of pure gaseous water for cooling. Finally, the opening degree of the third pump body 43 will increase, accelerating the cooling speed of compressor 11.

[0080] Specifically, the pressure in the evaporator 121 is maintained at 31.2 kPa, which allows tap water to be converted into water vapor at 75°C. This vapor is then processed and heated by the compressor 11 before being supplied to the user. The temperature of the working components of the compressor 11 is best maintained between 75-85°C.

[0081] After the fifth valve 55 and the sixth valve 56 are each opened and closed 5 times, the temperature of compressor 11 is measured. If the temperature of compressor 11 is within a suitable range, the current opening degree is maintained for the next cycle.

[0082] If the temperature of compressor 11 is below 75℃, the opening of the fifth valve 55 and the sixth valve 56 is reduced to circulate the system, the cooling power of the air-cooled cooler is reduced by one level, the water supply to the compressor 11 is reduced, and the opening of the second pump body 42 and the third pump body 43 is reduced by one level to maintain the pressure of the evaporator 121 at 31.2 kPa.

[0083] If the temperature of compressor 11 is higher than 85℃, the opening of the fifth valve 55 and the sixth valve 56 will be increased to circulate the system, thereby increasing the cooling power of the air-cooled cooler by one level and increasing the water supply to the compressor 11. At the same time, the opening of the second pump body 42 and the third pump body 43 will be increased by one level to maintain the pressure of the evaporator 121 at 31.2 kPa.

[0084] This invention replaces the air used in traditional steam centrifugal compressors to support the operation of the air-bearing bearings with gaseous water. Liquid water from a tap water source is purified before being introduced into the compressor to maintain unit operation. Furthermore, even if the purified water mixes into the unit from the air-bearing bearings, there is no need to worry about it carrying various impurities like air. The purified gaseous water can also be condensed back into liquid water for cooling the compressor's internal components, reducing the probability of unit malfunctions in the long run.

[0085] It should be noted that the terminology used above is for describing specific embodiments only and is not intended to limit the exemplary embodiments of the present invention. When the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. The order of execution of actions, steps, etc., in the apparatus and methods shown in the specification and drawings can be implemented in any order unless a specific order is expressly specified, and as long as the output of the preceding process is not used in the subsequent process. Similar sequential terms used for ease of description do not imply that such an order must be followed.

[0086] Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0087] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A compressor system characterized by, The compressor system comprises: a compressor comprising a motor cavity and a compression cavity spaced apart from each other, a main shaft penetrating through the motor cavity and the compression cavity, and an air-floating bearing located in the motor cavity and sleeved on the main shaft; a bearing gas supply assembly comprising an evaporation component for evaporating liquid water into gaseous water, a water supply pipeline for supplying the liquid water to the evaporation component, and a gas supply pipeline connected between the evaporation component and the compressor, the gas supply pipeline guiding the gaseous water to the motor cavity to support the air-floating bearing.

2. The compressor system of claim 1, wherein, Further comprising: a compressor cooling assembly comprising a cooling component for cooling the gaseous water into the liquid water, a water diversion pipeline connected between the evaporation component and the cooling component, and a cooling water pipeline connected between the cooling component and the compressor, the water diversion pipeline guiding the liquid water to the motor cavity or the compression cavity to cool the compressor.

3. The compressor system of claim 2, wherein, The cooling water pipeline is provided with a spray member for spraying the liquid water in mist form to the compression cavity.

4. The compressor system of claim 2, wherein, The gas supply pipeline is provided with a first pump body, the water diversion pipeline is provided with a second pump body, and the cooling water pipeline is provided with a third pump body.

5. The compressor system of claim 2, wherein, The water supply pipeline is provided with a water storage tank for storing the liquid water, and the compressor system further comprises: a return pipeline connected between the compressor and the water storage tank to guide the liquid water cooled by the compressor to the water storage tank.

6. The compressor system of claim 5, wherein, The water supply pipeline comprises a first water supply pipeline section and a second water supply pipeline section, the first water supply pipeline section is connected between a water source side and the water storage tank, and the second water supply pipeline section is connected between the water storage tank and the evaporation component, the first water supply pipeline section is provided with a first valve, and the second water supply pipeline section is provided with a second valve.

7. The compressor system of claim 1, wherein, The evaporation component is provided with a heat exchange pipe, and the compressor system further comprises: an inlet steam pipeline and an outlet steam pipeline, both connected to the compression cavity, the inlet steam pipeline supplies water vapor to be compressed to the compressor, and the outlet steam pipeline guides the water vapor compressed by the compressor to a user side; a shunt pipeline, the shunt pipeline comprises a first shunt pipeline section and a second shunt pipeline section, the first shunt pipeline section is connected between the outlet steam pipeline and the heat exchange pipe, and the second shunt pipeline section is connected between the heat exchange pipe and the inlet steam pipeline.

8. The compressor system of claim 7, wherein, The inlet steam pipeline is provided with a third valve, the outlet steam pipeline is provided with a fourth valve, the first shunt pipeline section is provided with a fifth valve, and the second shunt pipeline section is provided with a sixth valve.

9. The compressor system of any of claims 1-8, wherein, The evaporation component comprises an evaporation tank and an electric heater arranged on the evaporation tank.

10. A control method of a compressor system as claimed in any one of claims 1 to 9, characterized in that The compressor system comprises: acquiring a compressor temperature and determining whether the compressor temperature is within a preset compression temperature range; when the compressor temperature is higher than an upper limit value of the preset compression temperature range, increasing the opening degree of a valve on a water supply pipeline; when the compressor temperature is lower than a lower limit value of the preset compression temperature range, decreasing the opening degree of the valve on the water supply pipeline.

11. The control method of the compressor system according to claim 10, characterized by, Further comprising: when the compressor temperature is higher than the upper limit value of the preset compression temperature range, the opening degree of a valve on a shunt pipeline is also increased, or the opening degree of a pump body on a water diversion pipeline and a cooling water pipeline is also increased. When the compressor temperature is lower than the lower limit value of the preset compression temperature range, the opening of the valve on the bypass pipeline is also reduced, or the opening of the pump body on the large water pipeline and the cooling water pipeline is also reduced.

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