Air supply system for hydrostatic bearing

Abstract

The invention relates to the technical field of bearings, and provides a hydrostatic bearing gas supply system which comprises a first gas supply subsystem and a second gas supply subsystem, the first gas supply subsystem comprises a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism and a degassing structure, and the first reaction mechanism, the second reaction mechanism and the first pipeline are sequentially connected; a reactant is arranged in the first reaction mechanism, a catalyst is arranged in the second reaction mechanism, and the first check valve and the degassing structure are arranged on the first pipeline; the second gas supply subsystem is connected with the first pipeline; when the gas source is cut off, the reactant and the catalyst are subjected to chemical reaction in the second reaction mechanism to generate water vapor and oxygen, the degassing structure is used for consuming the oxygen and generating superheated steam, and the superheated steam enters the hydrostatic bearing. The air supply system for the hydrostatic bearing provides the pure water vapor working medium for the hydrostatic bearing, so that the normal operation of the hydrostatic bearing is ensured, and the hydrostatic bearing is prevented from being damaged.

Description

Technical Field

[0001] This invention relates to the field of bearing technology, and in particular to a hydrostatic bearing air supply system. Background Technology

[0002] Bearings are one of the core components of power machinery. Hydrostatic bearings have the characteristics of high load-bearing capacity and low friction loss. Compared with traditional hydrostatic oil-lubricated bearings, the oil supply system can be eliminated and mechanical losses can be reduced. In particular, when high-pressure gas inside the power system is used as the bearing working medium, the power system can be simplified and energy efficiency can be improved. However, when the gas supply system fails or the high-pressure gas is suddenly cut off, the load-bearing capacity of the hydrostatic bearing drops sharply, causing the rotor to collide with the hydrostatic bearing and causing damage to the hydrostatic bearing.

[0003] In this situation, a backup gas source needs to be configured. When the high-pressure gas supply to the system is interrupted, the system should immediately switch to the backup high-pressure gas source to maintain the bearing load for a period of time until the equipment stops operating. Generally, the bearing working fluid can be pre-pressurized and stored in a gas tank as a backup gas source. This method does not rely on complex real-time pressurization equipment and has good reliability. However, when using high-temperature, easily phase-change gas as the working fluid for hydrostatic bearings, the high-pressure working fluid in the gas tank will liquefy after dissipating heat to the outside, causing the temperature and pressure of the working fluid inside the tank to drop and turn into a liquid phase, thus failing to serve as a backup gas source. Based on this, providing a new hydrostatic bearing gas supply system has become an urgent problem to be solved in the industry. Summary of the Invention

[0004] This invention provides a hydrostatic bearing air supply system to solve the defect in the prior art that hydrostatic bearings cannot operate normally when the air supply system suddenly fails.

[0005] This invention provides a gas supply system for a hydrostatic bearing, comprising: a first gas supply subsystem, including: a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism, and a degassing structure; the first reaction mechanism, the second reaction mechanism, and the first pipeline are connected in sequence; the first reaction mechanism contains reactants, the second reaction mechanism contains a catalyst, the first check valve and the degassing structure are disposed in the first pipeline, and the degassing structure is located between the second reaction mechanism and the first check valve; a second gas supply subsystem is connected to the first pipeline, and its two ends are respectively used to connect to a gas source and a hydrostatic bearing; wherein, when the gas source is cut off, the first reaction mechanism and the second reaction mechanism are connected, the reactants and the catalyst undergo a chemical reaction in the second reaction mechanism to generate water vapor and oxygen, the water vapor and the oxygen push the first check valve to open, and the degassing structure is used to consume oxygen and generate superheated steam, the superheated steam entering the hydrostatic bearing.

[0006] According to the present invention, a hydrostatic bearing gas supply system is provided, wherein the degassing structure is a metal hydride porous medium.

[0007] According to a hydrostatic bearing gas supply system provided by the present invention, the first reaction mechanism includes: a first container, wherein the reactant is disposed in the first container and the first container is filled with high-pressure gas, and the first container is connected to the second reaction mechanism; and a gas supply assembly connected to the first container, the gas supply assembly being used to supply high-pressure gas to the first container.

[0008] According to the present invention, a hydrostatic bearing gas supply system includes: a gas cylinder containing high-pressure gas; a second pipeline connected at both ends to the gas cylinder and the first container, respectively, and a first valve provided on the second pipeline.

[0009] According to a hydrostatic bearing gas supply system provided by the present invention, the second reaction mechanism includes: a third pipeline connected to the first container, wherein a second valve is provided on the third pipeline; a second container connected to the first pipeline and the third pipeline, wherein the catalyst is provided in the second container and the second container is in a vacuum state, and the reactants and the catalyst undergo a chemical reaction in the second container.

[0010] According to the present invention, a hydrostatic bearing air supply system further includes a first pressure sensor disposed in the first container, the first pressure sensor being used to detect the pressure in the first container; and a controller, the controller being used to control the first valve to open when the pressure in the first container is less than a first preset value, the controller being further used to control the second valve to open when the air source is cut off.

[0011] According to the present invention, a hydrostatic bearing air supply system is provided, wherein the second air supply subsystem includes: a fourth pipeline, the two ends of which are respectively used to connect to the hydrostatic bearing and an air source, and the first pipeline is connected to the fourth pipeline; and a second check valve disposed on the fourth pipeline.

[0012] According to a hydrostatic bearing air supply system provided by the present invention, the second air supply subsystem further includes a second pressure sensor disposed in the fourth pipeline and located between the check valve and the hydrostatic bearing. The second pressure sensor is used to detect the pressure in the fourth pipeline. The controller is also used to control the second valve to open when the pressure in the fourth pipeline is less than a second preset value.

[0013] According to a hydrostatic bearing air supply system provided by the present invention, the second air supply subsystem further includes a third pressure sensor disposed in the fourth pipeline and located between the air source and the check valve. The third pressure sensor is used to detect the pressure in the fourth pipeline. The controller is also used to control the second valve to close when the pressure data detected by the third pressure sensor is greater than or equal to the second preset value.

[0014] According to the present invention, a hydrostatic bearing air supply system further includes an air inlet pipe, which is connected to the first pipeline, the fourth pipeline and the hydrostatic bearing.

[0015] The hydrostatic bearing gas supply system provided by the present invention, by setting a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism and a degassing structure, can generate high-temperature and high-pressure water vapor and oxygen by chemical reaction when the gas source is cut off, and consume the oxygen by the degassing structure, so as to provide pure water vapor working medium for the hydrostatic bearing, ensuring the normal operation of the hydrostatic bearing and avoiding damage to the hydrostatic bearing due to rotor collision. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the hydrostatic bearing air supply system provided by the present invention.

[0018] Figure label: 11. First pipeline; 12. Degassing structure; 13. First container; 14. Third pipeline; 15. Second container; 16. Gas cylinder; 17. Second pipeline; 21. Fourth pipeline; 22. Second check valve; 23. Second pressure sensor; 24. Third pressure sensor; 30. Inlet pipe; 101. Rotor; 102. Hydrostatic bearing; 111. First check valve; 131. Reactant; 132. First pressure sensor; 141. Second valve; 151. Catalyst; 171. First valve. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0020] The following is combined with Figure 1 The present invention describes a hydrostatic bearing air supply system.

[0021] like Figure 1 As shown, in an embodiment of the present invention, the hydrostatic bearing air supply system includes a first air supply subsystem and a second air supply subsystem. The second air supply subsystem is used to supply air to the hydrostatic bearing 102 during normal operation. The first air supply subsystem is used to supply air to the hydrostatic bearing 102 when the second air supply subsystem fails or when the air source is switched. In this embodiment, the working fluid of the hydrostatic bearing 102 is pure gaseous water vapor.

[0022] like Figure 1 As shown, the rotor 101 is sleeved inside the static pressure bearing 102, and there is a gap between the rotor 101 and the static pressure bearing 102. After the water vapor provided by the first air supply subsystem and the second air supply subsystem enters the static pressure bearing 102, it is discharged through the gap between the rotor 101 and the static pressure bearing 102.

[0023] In this embodiment, the first gas supply subsystem includes: a first pipeline 11, a first check valve 111, a first reaction mechanism, a second reaction mechanism, and a degassing structure 12. The first reaction mechanism, the second reaction mechanism, and the first pipeline 11 are connected in sequence, and the first pipeline 11 is connected to the second gas supply subsystem. The first check valve 111 and the degassing structure 12 are both disposed on the first pipeline 11, and the degassing structure 12 is located between the second reaction mechanism and the first check valve 111. The first reaction mechanism contains reactants 131, and the second reaction mechanism contains a catalyst 151.

[0024] Specifically, when the second gas supply subsystem malfunctions or the gas source is suddenly cut off, the first reaction mechanism connects with the second reaction mechanism. The reactant 131 in the first reaction mechanism enters the second reaction mechanism. When the reactant 131 comes into contact with the catalyst 151, a violent chemical reaction occurs, producing high-temperature, high-pressure steam and oxygen. A pressure difference exists across the first check valve 111, and the high-temperature, high-pressure steam and oxygen push the first check valve 111 open. When the high-temperature, high-pressure steam and oxygen flow along the first pipeline 11 to the degassing structure 12, the oxygen undergoes a catalytic oxidation reaction with the metal hydride in the degassing structure, generating metal oxides and superheated steam. The metal oxides remain in the degassing structure 12, and the superheated steam pressure decreases, entering the hydrostatic bearing 102 as the working fluid during operation. This ensures that the hydrostatic bearing 102 can operate normally when the second gas supply subsystem malfunctions or the gas source is cut off, preventing the rotor 101 from colliding with the hydrostatic bearing 102 and causing damage to the hydrostatic bearing 102.

[0025] In this embodiment, reactant 131 can be hydrogen peroxide, and catalyst 151 can be manganese dioxide. Hydrogen peroxide reacts violently with manganese dioxide to generate high-temperature and high-pressure water vapor and oxygen.

[0026] The hydrostatic bearing gas supply system provided in this embodiment of the invention, by setting a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism, and a degassing structure, can generate high-temperature and high-pressure water vapor and oxygen through chemical reaction when the gas source is cut off, and consume the oxygen through the degassing structure, providing pure water vapor working medium for the hydrostatic bearing, ensuring the normal operation of the hydrostatic bearing, and avoiding damage to the hydrostatic bearing due to rotor collision.

[0027] In an embodiment of the present invention, the degassing structure 12 is a metal hydride porous medium, in which the metal hydride can undergo a catalytic oxidation reaction with oxygen.

[0028] Specifically, when high-temperature, high-pressure steam and oxygen pass through the porous medium, the oxygen reacts with the metal hydride to generate stable metal oxides and steam, releasing heat. This further raises the temperature of the steam, forming superheated steam—pure gaseous steam. The steam's pressure decreases as it passes through the porous medium, creating a working fluid suitable for the operation of the hydrostatic bearing 102. The superheated steam then enters the hydrostatic bearing 102, supplying it with gas. Optionally, the metal hydride can be titanium hydride, magnesium hydride, etc.

[0029] In this embodiment, the volume and porosity of the porous medium are related to the amount of oxygen produced by the chemical reaction. The porous medium must be able to completely consume the oxygen produced by the chemical reaction within a set time, and must ensure that when high-temperature and high-pressure water vapor passes through the porous medium, the pressure of the water vapor can be reduced to the pressure range within which the hydrostatic bearing 102 operates normally.

[0030] like Figure 1 As shown, in an embodiment of the present invention, the first reaction mechanism includes a first container 13 and a gas supply assembly. The first container 13 contains reactant 131, and high-pressure gas is filled above the reactant 131. The first container 13 is connected to the second reaction mechanism. The gas supply assembly is connected to the first container 13 and is used to supply high-pressure gas to the first container 13.

[0031] Specifically, when the second gas supply subsystem malfunctions or the gas supply is cut off, the reactant 131 in the first container 13 enters the second reaction mechanism to undergo a chemical reaction. As the chemical reaction occurs, the pressure inside the second reaction mechanism increases. The purpose of filling the first container 13 with high-pressure gas is to ensure that the reactant 131 can still enter the second reaction mechanism under the action of the high-pressure gas when the pressure inside the second reaction mechanism increases. When the pressure inside the first container 13 decreases, the gas supply assembly supplies gas to the first container 13 to stabilize the pressure inside the first container 13, ensuring that the reactant 131 can enter the second reaction mechanism.

[0032] Furthermore, in an embodiment of the present invention, the gas supply assembly includes a gas cylinder 16 and a second pipeline 17. The gas cylinder 16 stores high-pressure gas, and the two ends of the second pipeline 17 are respectively connected to the gas cylinder 16 and the first container 13 to supply gas to the first container 13, thereby stabilizing the gas pressure at the top of the first container 13. A first valve 171 is provided on the second pipeline 17, which is used to control the opening and closing of the second pipeline 17.

[0033] like Figure 1 As shown, in an embodiment of the present invention, the second reaction mechanism includes a third pipeline 14 and a second container 15. The third pipeline 14 is connected to the first container 13, and a second valve 141 is provided on the third pipeline 14. The second container 15 is connected to the first pipeline 11 and the third pipeline 14, and a catalyst 151 is provided inside the second container 15, and the second container 15 is under vacuum. The reactant 131 and the catalyst undergo a chemical reaction inside the second container 15.

[0034] Specifically, when the second gas supply subsystem malfunctions or the gas supply is cut off, the second valve 141 is opened, and the reactant 131 enters the second container 15 through the third pipeline 14. The reactant 131 reacts violently upon contact with the catalyst 151, generating high-temperature, high-pressure steam and oxygen, which in turn opens the first check valve 111. The high-temperature, high-pressure steam and oxygen flow along the first pipeline 11. When passing through the degassing structure 12, the oxygen undergoes a catalytic oxidation reaction with the metal hydride within the degassing structure, generating metal oxides and steam. This catalytic oxidation reaction is exothermic, further increasing the temperature of the steam to form superheated steam. After passing through the degassing structure 12, the steam pressure decreases, forming a working gas that satisfies the operation of the hydrostatic bearing 102. The superheated steam enters the hydrostatic bearing 102 as the working medium, ensuring its normal operation even when the second gas supply subsystem malfunctions.

[0035] It should be noted that in this embodiment, the first valve 171 and the second valve 141 are one-way valves.

[0036] like Figure 1 As shown, in an embodiment of the present invention, the hydrostatic bearing air supply system further includes a first pressure sensor 132 and a controller. The first pressure sensor 132 is disposed inside the first container 13 and is used to detect the pressure inside the first container 13. When the pressure inside the first container 13 is less than a first preset value, the controller controls the first valve 171 to open, and the gas cylinder 16 supplies air to the first container 13; when the pressure inside the first container 13 is greater than or equal to the first preset value, the controller controls the first valve 171 to close.

[0037] like Figure 1 As shown, in an embodiment of the present invention, the second air supply subsystem includes a fourth pipeline 21 and a second check valve 22. The two ends of the fourth pipeline 21 are respectively used to connect to the hydrostatic bearing 102 and the air source, the first pipeline 11 is connected to the fourth pipeline 21, and the second check valve 22 is disposed on the fourth pipeline 21.

[0038] Specifically, under normal circumstances, the second check valve 22 is in the open state, and the air source supplies air to the static pressure bearing 102 through the fourth pipeline 21. When the air source is cut off, and the first air supply subsystem supplies air to the static pressure bearing 102, there is a pressure difference on both sides of the second check valve 22, and the second check valve 22 closes.

[0039] like Figure 1As shown, in an embodiment of the present invention, the second gas supply subsystem further includes a second pressure sensor 23, which is disposed in the fourth pipeline 21 and located between the second check valve 22 and the static pressure bearing 102. For ease of description, the section of the pipeline between the gas source and the second check valve 22 in the fourth pipeline 21 is named the first section of the pipeline, and the section of the pipeline between the second check valve 22 and the static pressure bearing 102 is named the second section of the pipeline. The second pressure sensor 23 is used to detect the pressure in the second section of the pipeline. When the pressure in the second section of the pipeline is less than a second preset value, it indicates that the gas source is cut off, and the controller controls the second valve 141 to open, so that the first container 13 and the second container 15 are connected.

[0040] like Figure 1 As shown, in an embodiment of the present invention, the second gas supply subsystem further includes a third pressure sensor 24. The third pressure sensor 24 is disposed in the fourth pipeline 21 and located between the gas source and the second check valve 22, that is, the third pressure sensor 24 is disposed in the first section of the pipeline. The third pressure sensor 24 is used to detect the pressure in the first section of the pipeline. When the gas supply is restored, the gas pressure in the first section of the pipeline gradually increases. When the pressure in the first section of the pipeline reaches or exceeds the second preset value, the controller controls the second valve 141 to close, the first container 13 stops supplying reactant 131 to the second container 15, and the reaction is interrupted. As the pressure in the second container 15 decreases, the remaining water vapor gradually condenses until the pressure is less than the pressure in the second section of the pipeline, and the first check valve 111 closes under the action of the pressure difference. Meanwhile, the pressure in the first section of the pipeline gradually exceeds the pressure in the second section of the pipeline, the second check valve 22 opens under the action of the pressure difference, and the gas source begins to supply gas to the hydrostatic bearing 102. When the gas source is supplying gas normally, reactant 131 can be added to the first container 13, catalyst 151 can be added to the second container 15, and the degassing structure 12 can be replaced, thus realizing online maintenance of the first gas supply subsystem without the need for shutdown maintenance.

[0041] like Figure 1 As shown, in an embodiment of the present invention, the continuously supplying gas system for the static pressure bearing further includes an inlet pipe 30, which is connected to the first pipe 11, the fourth pipe 21, and the static pressure bearing 102. When the gas source supplies gas to the static pressure bearing 102, the water vapor supplied by the gas source enters the static pressure bearing 102 through the fourth pipe 21 and the inlet pipe 30; when the first gas supply subsystem supplies gas to the static pressure bearing 102, the water vapor enters the static pressure bearing 102 through the first pipe 11 and the inlet pipe 30.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A hydrostatic bearing air supply system, characterized in that, include: The first gas supply subsystem includes: a first pipeline, a first check valve, a first reaction mechanism, a second reaction mechanism, and a degassing structure. The first reaction mechanism, the second reaction mechanism, and the first pipeline are connected in sequence. The first reaction mechanism contains reactants, and the second reaction mechanism contains a catalyst. The first check valve and the degassing structure are disposed in the first pipeline, and the degassing structure is located between the second reaction mechanism and the first check valve. The second air supply subsystem is connected to the first pipeline, and the two ends of the second air supply subsystem are respectively used to connect to the air source and the static pressure bearing. When the gas source is cut off, the first reaction mechanism is connected to the second reaction mechanism. The reactants and the catalyst undergo a chemical reaction in the second reaction mechanism to generate water vapor and oxygen. The water vapor and the oxygen push the first check valve to open. The degassing structure is used to consume oxygen and generate superheated steam. The superheated steam enters the hydrostatic bearing.

2. The hydrostatic bearing air supply system according to claim 1, characterized in that, The degassing structure is a metal hydride porous medium.

3. The hydrostatic bearing air supply system according to claim 1, characterized in that, The first reaction mechanism includes: A first container, containing the reactants, filled with high-pressure gas, and connected to a second reaction mechanism; A gas supply assembly, connected to the first container, is used to supply high-pressure gas to the first container.

4. The hydrostatic bearing air supply system according to claim 3, characterized in that, The gas supply assembly includes: A gas cylinder containing high-pressure gas; The second pipeline is connected at both ends to the gas cylinder and the first container, respectively, and a first valve is provided on the second pipeline.

5. The hydrostatic bearing air supply system according to claim 4, characterized in that, The second reaction mechanism includes: A third pipeline is connected to the first container, and a second valve is provided on the third pipeline; The second container is connected to the first pipeline and the third pipeline. The second container contains the catalyst and is in a vacuum state. The reactants and the catalyst undergo a chemical reaction in the second container.

6. The hydrostatic bearing air supply system according to claim 5, characterized in that, It also includes a first pressure sensor, which is disposed inside the first container, and the first pressure sensor is used to detect the pressure inside the first container; The controller is configured to open the first valve when the pressure inside the first container is less than a first preset value, and the controller is also configured to open the second valve when the gas source is cut off.

7. The hydrostatic bearing air supply system according to claim 6, characterized in that, The second gas supply subsystem includes: The fourth pipeline has two ends for connecting to the hydrostatic bearing and the air source, respectively, and the first pipeline is connected to the fourth pipeline. The second check valve is installed in the fourth pipeline.

8. The hydrostatic bearing air supply system according to claim 7, characterized in that, The second air supply subsystem also includes a second pressure sensor, which is disposed in the fourth pipeline and located between the check valve and the hydrostatic bearing. The second pressure sensor is used to detect the pressure in the fourth pipeline. The controller is also used to control the second valve to open when the pressure in the fourth pipeline is less than a second preset value.

9. The hydrostatic bearing air supply system according to claim 8, characterized in that, The second gas supply subsystem also includes a third pressure sensor, which is installed in the fourth pipeline and located between the gas source and the check valve. The third pressure sensor is used to detect the pressure in the fourth pipeline. The controller is also used to control the second valve to close when the pressure data detected by the third pressure sensor is greater than or equal to the second preset value.

10. The hydrostatic bearing air supply system according to claim 7, characterized in that, It also includes an air intake pipe, which is connected to the first pipe, the fourth pipe and the hydrostatic bearing.

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