CN113027922A - High-speed air suspension bearing - Google Patents

High-speed air suspension bearing Download PDF

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Publication number
CN113027922A
CN113027922A CN202110271143.6A CN202110271143A CN113027922A CN 113027922 A CN113027922 A CN 113027922A CN 202110271143 A CN202110271143 A CN 202110271143A CN 113027922 A CN113027922 A CN 113027922A
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gas
control module
central control
air
bearing
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CN202110271143.6A
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CN113027922B (en
Inventor
殷爱军
曹政坤
丁磊
张扬军
钱煜平
陈光亮
侯跃艳
鲁晓燕
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Shandong Supermaly Generating Equipment Co ltd
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Shandong Supermaly Generating Equipment Co ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0603—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion
    • F16C32/0614—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings
    • F16C32/0622—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings supported by a gas cushion, e.g. an air cushion the gas being supplied under pressure, e.g. aerostatic bearings via nozzles, restrictors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C32/00—Bearings not otherwise provided for
    • F16C32/06—Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings
    • F16C32/0662—Details of hydrostatic bearings independent of fluid supply or direction of load
    • F16C32/067—Details of hydrostatic bearings independent of fluid supply or direction of load of bearings adjustable for aligning, positioning, wear or play

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Magnetic Bearings And Hydrostatic Bearings (AREA)

Abstract

The invention relates to a high-speed gas suspension bearing which comprises a bearing inner ring, a bearing outer ring, a gas inlet nozzle, a gas channel, a rotor, a nozzle, a gas outlet hole, a gas valve, a gas bin, a gas pressure sensor, a central control module, a pressurizer and a gas inlet channel, wherein the central control module is respectively connected with the gas valve, the gas pressure sensor and the pressurizer and used for adjusting the working modes of all parts. According to the invention, the working states of all parts are intelligently adjusted through the central control module, so that the pressure of gas input into the bearing is always kept above a standard line, the rotor is prevented from colliding with the inner ring of the bearing in the bearing operation process, and the service life of the gas suspension bearing is prolonged.

Description

High-speed air suspension bearing
Technical Field
The invention relates to the technical field of bearings, in particular to a high-speed air suspension bearing.
Background
Gas suspension bearings (also called gas suspension bearings) refer to sliding bearings that use gas (usually gas, but other gases are possible) as a lubricant. Gas has less viscosity than oil, is resistant to high temperature, is pollution-free, and thus can be used in high-speed machines, instruments, and radioactive devices, but has a lower load capacity than oil. Air suspension bearings fall into three main categories: aerostatic bearings, aerodynamic bearings and squeeze film bearings. Aerostatic bearings are widely used in the general industry. Based on the inherent properties of gas (low viscosity, small change along with temperature, radiation resistance and the like), the gas suspension bearing has unique advantages in the fields of high speed, low friction, high temperature, low temperature and radiation. For example, in the technologies of high-speed grinding heads, high-speed centrifugal separators, gyroscope instruments, compressors for cooling nuclear reactors, high-speed blowers, electronic computer memory devices and the like, the adoption of the air suspension bearing breaks through the difficulty which cannot be solved by using rolling bearings or oil film bearings.
Air-bearing bearings provide extremely high radial and axial rotational accuracy. Because of no mechanical contact, the wear degree is reduced to the minimum, thereby ensuring that the precision is always kept stable.
Due to the difference in manufacturing structure, the accuracy of the gas spindle in rotation is inherently possessed. Special manufacturing techniques improve this accuracy and can provide extremely high rotational and axial accuracy. The gas spindle is designed to achieve rotational accuracy of less than 0.1 micron TIR in both the axial and radial directions. Since there is no mechanical contact between the rotating rotor and the static support part, no wear occurs, thus ensuring that the accuracy remains constant at all times — an important feature for manufacturers to use statistical machining controls.
The low shear force inside the air suspension bearing can provide extremely high rotation speed, simultaneously reduce power loss to the minimum and generate very little heat. The rotational speed may exceed 300,000 revolutions per minute.
Air-bearing bearings have low drag, allow higher speeds, and can simultaneously maintain lower vibration levels. Friction is very small in the resistance to rotation of the air bearing and, therefore, power loss and heat generation are also very small. This enables the rotor to operate at extremely high surface speeds. In some spindles, higher rotational speeds result in increased bearing stiffness due to aerodynamic and rotational stiffening features.
The working principle of the air suspension bearing is that the elastic potential energy of gas is used for supporting the rotor in the bearing, so that the air suspension bearing has higher requirements on the flow rate and pressure of the charged gas, the air suspension bearing on the market at present only simply pressurizes the external gas through a pressurizer, the flow rate and pressure of the gas charged into the bearing are not optimal, and the service life of the image air suspension bearing is prolonged.
Disclosure of Invention
Therefore, the invention provides a high-speed air bearing, which is used for overcoming the problem that the service life of the image air bearing is not optimal in the prior art due to the flow rate and the pressure of air filled into the bearing.
In order to achieve the aim, the invention provides a high-speed gas suspension bearing which comprises a bearing inner ring, a bearing outer ring, a gas inlet nozzle, a gas channel, a rotor, a nozzle, a gas outlet, a gas valve, a gas bin, a gas pressure sensor, a central control module, a pressurizer and a gas inlet channel, wherein the gas inlet nozzle is arranged on the bearing inner ring;
the air inlet channel is used for conveying external air to the interior of the high-speed air suspension bearing;
the gas channel is used for conveying gas inside the high-speed gas suspension bearing;
the nozzle is used for conveying gas to a gas cabin to suspend the rotor;
the rotor is connected with the external rotator;
the gas valve is arranged on the gas channel, and the opening degree of the gas valve can be changed to adjust the gas delivery quantity of the high-speed gas suspension bearing;
the pressurizer is connected with the air inlet channel and is used for pressurizing air with insufficient external pressure;
the air pressure sensor is arranged on the air inlet pipeline and used for detecting the pressure of air entering the high-speed air suspension bearing;
the central control module is respectively connected with the gas valve, the gas pressure sensor and the pressurizer and is used for adjusting the working modes of all the parts;
when the high-speed air suspension bearing operates, the air pressure sensor detects an external access air pressure value A and transmits a detection result to the central control module, and the central control module judges whether the external access air pressure meets the bearing suspension requirement according to the external access air pressure value A, so that whether the opening of the air valve is adjusted is further judged;
when the central control module adjusts the opening of the gas valve, an air pressure-to-gas valve opening compensation parameter is set, and the air pressure-to-gas valve opening compensation parameter value is adjusted along with the pressure of external gas;
when the opening of the gas valve is adjusted, the central control module checks the adjusted opening value and judges whether the opening value is in a reasonable range, and when the adjusted gas valve is out of the reasonable range, the central control module controls the pressurizer to pressurize external gas;
when the pressurizing machine completes pressurization of external gas, the air pressure sensor detects a pressurized air pressure value A ', the central control module verifies the air pressure value A', whether a pressurization result reaches the standard or not is detected, and when the pressurization result does not reach the standard, the central control module adjusts the pressurization power of the pressurizing machine.
Further, be equipped with the initial aperture parameter K of gas valve and standard access atmospheric pressure value Ab in the well accuse module, when adopting the gas suspension bearing, well accuse module compares atmospheric pressure value A and standard access atmospheric pressure value Ab that detect, judges whether adjust the gas valve aperture according to the comparison result:
when A is larger than or equal to Ab, the central control module judges that the external access air pressure meets the bearing suspension requirement, and the central control module does not adjust the initial opening parameter K of the gas valve;
when A is smaller than Ab, the central control module judges that external access air pressure does not meet the bearing suspension requirement, and the central control module adjusts the opening degree of the air valve.
Further, when the central control module determines that the external access air pressure does not meet the bearing suspension requirement, the central control module calculates an external pressure difference value Δ a, where Δ a is Ab-a, and adjusts the opening of the air valve to K', K is K + K × Δ a × B, where B is an air pressure-to-air valve opening compensation parameter.
Furthermore, an initial value B of an air pressure to air valve opening compensation parameter is set in the central control module, an actual value bz of the air pressure to air valve opening compensation parameter B is adjusted along with an external pressure difference value delta A, and bz is BΔA×e×2/3+1And e is an adjusting parameter of the external pressure difference value delta A to the air pressure-to-air valve opening compensation parameter B, and aims to eliminate the difference value delta A unit.
Further, an opening degree evaluation parameter value Kp is arranged in the central control module, and the central control module compares the adjusted opening degree value K' with the opening degree evaluation parameter value Kp:
when K' is less than or equal to Kp, the central control module judges that the opening of the gas valve is enough to adjust the gas delivery quantity, so that the gas can well support the rotor;
when K' > Kp, the central control module determines that the gas valve opening is insufficient to adjust the gas delivery amount.
Further, when K '> Kp, the central control module calculates an opening degree super difference value delta K, and the delta K is K' -Kp;
the central control module controls the pressurizer to pressurize input gas, the pressurizer adjusts the power D of the externally-connected pressurizer for the input gas according to the opening over-difference value delta K, D is delta K multiplied by D +1, and D is an adjusting parameter of the opening over-difference value delta K on the power D of the pressurizer.
Further, after the central control module determines the pressure of the pressure device power D, the central control module pressurizes the input gas, the pressure sensor detects a pressurized pressure value a ', the central control module calculates a ratio G of the detected pressure value a ' to a pressurized theoretical pressure value AL, where AL is a × D, and G is a '/AL, where D is an ideal compensation parameter of the pressure device power to the pressurized pressure value
The central control module compares the ratio G with a preset ratio G to judge whether the pressurization result reaches the standard or not:
when G is larger than or equal to G, the central control module judges that the pressurization result reaches the standard;
and when G is less than G, the central control module judges that the pressurization result does not reach the standard.
Further, when the central control module determines that the pressurization result meets the standard, the central control module compares the air pressure value a' with the standard access air pressure value Ab:
when A' is not less than Ab, the central control module judges that external access air pressure meets the bearing suspension requirement;
and when A' < Ab, the central control module judges that the external access air pressure does not meet the bearing suspension requirement, and the central control module adjusts the opening of the air valve according to the air pressure value and the air valve opening adjusting operation.
Further, when the central control module determines that the pressurization result does not meet the standard, the central control module calculates a difference value delta Az between the air pressure value a ' and the post-pressurization theoretical air pressure value AL, where delta Az is AL-a ', and the central control module adjusts the power D of the pressurizer to D ', D is D × 1 according to the difference value delta Az1+ΔAz×aAnd a is the difference value delta Az to the power compensation parameter of the pressurizer.
Further, when the power of the pressure machine is adjusted to be D ', the central control module pressurizes input gas, the pressure sensor detects a pressurized pressure value A', and the central control module calculates the ratio G ', G' ═ A '/AL of the detected pressure value A' and a pressurized theoretical pressure value AL;
the central control module compares the ratio G 'with a preset ratio G to judge whether the pressurization result reaches the standard, and when G' is larger than or equal to G, the central control module judges that the pressurization result reaches the standard; when G is less than G, the operation of adjusting the power of the pressure machine according to the difference value delta Az is repeated until G' is more than or equal to G.
Compared with the prior art, the air suspension bearing has the beneficial effects that the central control module capable of adjusting the working state of each part is additionally arranged on the air suspension bearing, when the high-speed air suspension bearing runs, the air pressure sensor detects an external access air pressure value A and transmits a detection result to the central control module, and the central control module judges whether the external access air pressure meets the bearing suspension requirement according to the external access air pressure value A, so that whether the opening of the air valve is adjusted is further judged; when the central control module adjusts the opening of the gas valve, an air pressure-to-gas valve opening compensation parameter is set, and the air pressure-to-gas valve opening compensation parameter value is adjusted along with the pressure of external gas; when the opening of the gas valve is adjusted, the central control module checks the adjusted opening value and judges whether the opening value is in a reasonable range, and when the adjusted gas valve is out of the reasonable range, the central control module controls the pressurizer to pressurize external gas; when the pressurizing machine completes pressurization of external gas, the air pressure sensor detects a pressurized air pressure value A ', the central control module verifies the air pressure value A', whether a pressurization result reaches the standard or not is detected, and when the pressurization result does not reach the standard, the central control module adjusts the pressurization power of the pressurizing machine. The central control module intelligently adjusts the working states of all parts, so that the pressure of gas input into the bearing is always kept above a standard line, the rotor is prevented from colliding with the inner ring of the bearing in the running process of the bearing, and the service life of the gas suspension bearing is prolonged.
Particularly, when the central control module judges that the external access air pressure does not meet the bearing suspension requirement, the central control module calculates an external pressure difference value delta A, and the central control module adjusts the opening degree of the air valve to K'; when the external access atmospheric pressure does not satisfy the bearing suspension requirement, increase the gas valve opening, make gas amount in the gas suspension bearing can reach the support bearing suspension requirement, right the suspension bearing carries out intelligent control, has further prolonged the life of gas suspension bearing.
Particularly, an initial value B of an air pressure-to-air valve opening compensation parameter is set in the central control module, an actual value bz of the air pressure-to-air valve opening compensation parameter B is adjusted along with an external pressure difference value delta A, and bz is BΔA×e×2/3+1Wherein e is an adjusting parameter of the external pressure difference value delta A to the air pressure to air valve opening compensation parameter B, and the aim is to eliminate the difference value delta A unit; the opening compensation parameter is adjusted according to the pressure difference value, the smaller the external pressure value is, the larger the opening compensation parameter B of the gas valve is, so that the gas in the gas suspension bearing can support the rotor, and meanwhile, the power function is performedbz＝bΔA×e×2/3+1And 2/3 is multiplied by the value variable part of the power, so that the transformation process meets the standard rate, and further, the gas can well support the rotor.
Particularly, an opening degree evaluation parameter value Kp is arranged in the central control module, and the central control module compares the adjusted opening degree value K' with the opening degree evaluation parameter value Kp: when K' is larger than Kp, the central control module judges that the opening of the gas valve is insufficient to adjust the gas delivery amount; the maximum value of the opening of the gas valve is 1, the calculated opening compensation parameter B of the gas valve calculated through the power function may cause the calculated opening to be larger than 1, obviously, the calculated opening is contrary to objective rules, an opening judgment parameter value Kp is set, when the opening is larger than 1 in the adjusting process, the central control module cannot make an effective instruction on the gas valve, meanwhile, Kp is set to be 0.95, a safety threshold value of 0.05 is reserved, and the suspension bearing can be safer in the using process.
In particular, when K '> Kp, the central control module calculates an opening degree over-difference value delta K, and the delta K is K' -Kp; the central control module controls the pressurizer to pressurize input gas, the pressurizer adjusts the power D of the externally-connected pressurizer for the input gas according to the opening over-difference value delta K, D is delta K multiplied by D +1, and D is an adjusting parameter of the opening over-difference value delta K on the power D of the pressurizer. When the input gas pressure is enough, the pressurizer is not started, when the input gas pressure is not enough, the input gas is pressurized through the pressurizer, whether the pressurizer is started or not is determined by the adjusted opening value, the pressurizer is prevented from being started all the time to waste energy, meanwhile, the power D of the pressurizer is adjusted according to the opening over-difference value delta K, the power of the pressurizer is intelligently adjusted, the pressurized gas pressure is enough to support the rotor to suspend, the smaller the opening over-difference value delta K is, the smaller the power D of the pressurizer is, the larger the opening over-difference value delta K is, the larger the power D of the pressurizer is, the power of the pressurizer is intelligently adjusted and controlled, the energy waste caused by the overlarge power of the pressurizer is prevented, and meanwhile, the. The adjusting times and time are reduced, the rotor and the bearing inner ring are further prevented from colliding in the bearing operation process, and the service life of the air suspension bearing is prolonged.
Particularly, after the central control module determines the power D of the pressurizing machine, the central control module pressurizes the input gas, the pressure sensor detects the pressurized pressure value a ', the central control module calculates the ratio G of the detected pressure value a' to the pressurized theoretical pressure value AL, and the central control module compares the ratio G with a preset ratio G to determine whether the pressurization result reaches the standard: when G is larger than or equal to G, the central control module judges that the pressurization result reaches the standard; when G is less than G, the central control module judges that the pressurization result does not reach the standard; the pressure after pressurization is detected after pressurization is completed, and the condition that the pressure does not reach the standard due to pressurization loss in the pressurization process is prevented.
Drawings
Fig. 1 is a schematic structural diagram of a high-speed air bearing according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, which is a schematic structural diagram of the high-speed gas suspension bearing of the present invention, the present invention relates to a high-speed gas suspension bearing, including a bearing inner ring 1, a bearing outer ring 2, a gas inlet nozzle 3, a gas channel 4, a rotor 5, a nozzle 6, a gas outlet 7, a gas valve 8, a gas bin 9, a gas pressure sensor 10, a central control module 11, a pressurizer 12, and a gas inlet channel 13;
the air inlet channel 13 is used for conveying external air to the interior of the high-speed gas suspension bearing;
the gas channel 4 is used for conveying gas inside the high-speed gas suspension bearing;
the nozzles 6 are used to deliver gas to a gas silo to suspend the rotor 5;
the rotor 5 is connected with an external rotator;
the gas valve 8 is arranged on the gas channel 4, and the opening degree of the gas valve 8 is variable to adjust the gas delivery amount of the high-speed gas suspension bearing;
the pressurizer 12 is connected with the air inlet channel 13 and used for pressurizing air with insufficient external pressure;
the air pressure sensor 10 is arranged on the air inlet pipeline and used for detecting the pressure of air entering the high-speed air suspension bearing;
the central control module 11 is respectively connected with the gas valve 8, the gas pressure sensor 10 and the pressurizer 12 and is used for adjusting the working modes of all the parts;
when the high-speed air suspension bearing operates, the air pressure sensor 10 detects an external access air pressure value A and transmits a detection result to the central control module 11, and the central control module 11 judges whether the external access air pressure meets the bearing suspension requirement according to the external access air pressure value A, so that whether the opening of the air valve 8 is adjusted is further judged;
when the central control module 11 adjusts the opening of the gas valve 8, an air pressure-to-gas valve 8 opening compensation parameter is set, and the air pressure-to-gas valve 8 opening compensation parameter value is adjusted along with the pressure of external gas;
after the opening of the gas valve 8 is adjusted, the central control module 11 checks the adjusted opening value to determine whether the opening value is in a reasonable range, and when the adjusted gas valve 8 Kesu is not in the reasonable range, the central control module 11 controls the pressurizer 12 to pressurize the external gas.
Specifically, after the pressurizer 12 pressurizes the external gas, the air pressure sensor 10 detects a pressurized air pressure value a ', the central control module 11 checks the air pressure value a', whether a pressurization result reaches the standard or not is detected, and when the pressurization result does not reach the standard, the central control module 11 adjusts the pressurization power of the pressurizer 12;
the central control module 11 is internally provided with an initial opening parameter K of the gas valve 8 and a standard access gas pressure value Ab, when the gas suspension bearing is adopted, the gas pressure sensor 10 detects an external access gas pressure value a and transmits a detection result to the central control module 11, the central control module 11 compares the detected gas pressure value a with the standard access gas pressure value Ab, and judges whether to adjust the opening of the gas valve 8 according to the comparison result:
when A is larger than or equal to Ab, the central control module 11 judges that the external access air pressure meets the bearing suspension requirement, and the central control module 11 does not adjust the initial opening parameter K of the gas valve 8;
when A is less than Ab, the central control module 11 judges that the external access air pressure does not meet the bearing suspension requirement, and the central control module 11 adjusts the opening of the air valve 8.
When the central control module 11 determines that the external access air pressure does not meet the bearing suspension requirement, the central control module 11 calculates an external pressure difference value Δ a, where Δ a is Ab-a, the central control module 11 adjusts the opening of the gas valve 8 to K', K is K + K × Δ a × B, where B is an air pressure-to-gas valve 8 opening compensation parameter.
When the external access air pressure does not meet the bearing suspension requirement, the opening degree of the air valve 8 is increased, so that the amount of air in the air suspension bearing can meet the suspension requirement of the support bearing, and the suspension bearing is intelligently controlled.
Specifically, an initial value B of an opening compensation parameter of the air pressure to the air valve 8 is set in the central control module 11, an actual value bz of an opening compensation parameter B of the air pressure to the air valve 8 is adjusted along with an external pressure difference Δ a, and bz is BΔA×e×2/3+1Wherein e is the adjusting parameter of the external pressure difference value delta A to the gas pressure to the opening compensation parameter B of the gas valve 8, and the aim is to eliminate the difference value delta A unit.
The opening compensation parameter is adjusted according to the pressure difference value, the smaller the external pressure value is, the larger the opening compensation parameter B of the gas valve 8 is, so that the gas in the gas suspension bearing can support the rotor 5, and meanwhile, the power function bz is BΔA×e×2/3+1And 2/3 is partially multiplied by the value variable of the power, so that the transformation process meets the standard rate, and the gas can well support the rotor 5.
Specifically, an opening degree evaluation parameter value Kp is provided in the central control module 11, and the central control module 11 compares the adjusted opening degree value K' with the opening degree evaluation parameter value Kp:
when K' is less than or equal to Kp, the central control module 11 judges that the opening degree of the gas valve 8 is enough to adjust the gas delivery quantity, so that the gas can realize good support on the rotor 5;
when K' > Kp, the central control module 11 judges that the opening degree of the gas valve 8 is not enough to adjust the gas delivery amount;
and the opening degree evaluation parameter value Kp is 0.95.
The maximum value of the opening degree value of the gas valve 8 is 1, the calculated opening degree compensation parameter B of the gas valve 8 calculated through the power function may cause the calculated opening degree value to be larger than 1, obviously, the calculated opening degree value is contrary to objective rules, an opening degree evaluation parameter value Kp is set, when the opening degree value is larger than 1 in the adjusting process, the central control module 11 cannot make an effective instruction for the gas valve 8, meanwhile, Kp is set to be 0.95, a safety threshold value of 0.05 is reserved, and the suspension bearing can be safer in the using process.
Specifically, when K '> Kp, the central control module 11 calculates an opening degree excess value Δ K, which is K' -Kp.
The central control module 11 controls the pressurizer 12 to pressurize the input gas, the pressurizer 12 adjusts the power D of the externally connected pressurizer 12 for inputting the gas according to the opening over-difference value delta K, where D is Δ K × D +1, and D is an adjustment parameter of the opening over-difference value delta K for the power D of the pressurizer 12.
When the input gas pressure is enough, the pressurizer 12 is not started, when the input gas pressure is not enough, the input gas is pressurized through the pressurizer 12, whether the pressurizer 12 is started or not is determined by the adjusted opening value, energy waste caused by the fact that the pressurizer 12 is started all the time is prevented, meanwhile, the power D of the pressurizer 12 is adjusted according to the opening over-difference value delta K, the power of the pressurizer 12 is intelligently adjusted, the pressurized gas pressure is enough to support the rotor 5 to suspend, the smaller the opening over-difference value delta K is, the smaller the power D of the pressurizer 12 is, the larger the opening over-difference value delta K is, the larger the power D of the pressurizer 12 is, the power of the pressurizer 12 is intelligently adjusted and controlled, energy waste caused by the fact that the power of the pressurizer 12 is too large is prevented, and.
Specifically, after the central control module 11 determines the power D of the pressurizer 12, the central control module 11 pressurizes the input gas, the air pressure sensor 10 detects a pressurized air pressure value a ', and the central control module 11 calculates a ratio G of the detected air pressure value a ' to a pressurized theoretical air pressure value AL, where AL is a × D and G is a '/AL, where D is an ideal compensation parameter for the pressurized air pressure value by the power of the pressurizer 12.
The central control module 11 compares the ratio G with a preset ratio G to judge whether the pressurization result reaches the standard:
when G is larger than or equal to G, the central control module 11 judges that the pressurization result reaches the standard;
when G is less than G, the central control module 11 judges that the pressurization result does not reach the standard;
the preset ratio g is 0.9.
The pressure after pressurization is detected after pressurization is completed, and the condition that the pressure does not reach the standard due to pressurization loss in the pressurization process is prevented.
Specifically, when the central control module 11 determines that the pressurization result reaches the standard, the central control module 11 compares the air pressure value a' with the standard access air pressure value Ab:
when A' is not less than Ab, the central control module 11 judges that the external access air pressure meets the bearing suspension requirement;
when A' < Ab, the central control module 11 judges that the external access air pressure does not meet the bearing suspension requirement, and the central control module 11 adjusts the opening of the air valve 8 according to the air pressure value and the opening adjusting operation of the air valve 8.
Specifically, when the central control module 11 determines that the pressurization result does not meet the standard, the central control module 11 calculates a difference Δ Az between the air pressure value a ' and the post-pressurization theoretical air pressure value AL, where Δ Az is AL-a ', and the central control module 11 adjusts the power D of the pressurization machine 12 to D ', D ═ D × 1 according to the difference Δ Az1+ΔAz×aWhere a is the difference Δ Az versus the power compensation parameter for the pressurizer 12.
Specifically, when the power of the pressurizer 12 is adjusted to D ', the central control module 11 pressurizes the input gas, the gas pressure sensor 10 detects a pressurized gas pressure value a ″, and the central control module 11 calculates a ratio G', G ═ a ″/AL between the detected gas pressure value a ″ and a theoretical gas pressure value AL after pressurization;
the central control module 11 compares the ratio G 'with a preset ratio G to judge whether the pressurization result reaches the standard, and when G' is larger than or equal to G, the central control module 11 judges that the pressurization result reaches the standard; when G < G, the power adjustment operation of the pressurizer 12 according to the difference value Δ Az is repeated until G' is equal to or greater than G.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. A high-speed gas suspension bearing is characterized by comprising a bearing inner ring, a bearing outer ring, a gas inlet nozzle, a gas channel, a rotor, a nozzle, a gas outlet hole, a gas valve, a gas bin, a gas pressure sensor, a central control module, a pressurizer and a gas inlet channel;
the air inlet channel is used for conveying external air to the interior of the high-speed air suspension bearing;
the gas channel is used for conveying gas inside the high-speed gas suspension bearing;
the nozzle is used for conveying gas to a gas cabin to suspend the rotor;
the rotor is connected with the external rotator;
the gas valve is arranged on the gas channel, and the opening degree of the gas valve can be changed to adjust the gas delivery quantity of the high-speed gas suspension bearing;
the pressurizer is connected with the air inlet channel and is used for pressurizing air with insufficient external pressure;
the air pressure sensor is arranged on the air inlet pipeline and used for detecting the pressure of air entering the high-speed air suspension bearing;
the central control module is respectively connected with the gas valve, the gas pressure sensor and the pressurizer and is used for adjusting the working modes of all the parts;
when the high-speed air suspension bearing operates, the air pressure sensor detects an external access air pressure value A and transmits a detection result to the central control module, and the central control module judges whether the external access air pressure meets the bearing suspension requirement according to the external access air pressure value A, so that whether the opening of the air valve is adjusted is further judged;
when the central control module adjusts the opening of the gas valve, an air pressure-to-gas valve opening compensation parameter is set, and the air pressure-to-gas valve opening compensation parameter value is adjusted along with the pressure of external gas;
when the opening of the gas valve is adjusted, the central control module checks the adjusted opening value and judges whether the opening value is in a reasonable range, and when the adjusted gas valve is out of the reasonable range, the central control module controls the pressurizer to pressurize external gas;
when the pressurizing machine completes pressurization of external gas, the air pressure sensor detects a pressurized air pressure value A ', the central control module verifies the air pressure value A', whether a pressurization result reaches the standard or not is detected, and when the pressurization result does not reach the standard, the central control module adjusts the pressurization power of the pressurizing machine.
2. The high-speed air bearing of claim 1, wherein the central control module is provided with an initial opening parameter K of the air valve and a standard access air pressure value Ab, and when the air bearing is adopted, the central control module compares the detected air pressure value a with the standard access air pressure value Ab, and determines whether to adjust the opening of the air valve according to the comparison result:
when A is larger than or equal to Ab, the central control module judges that the external access air pressure meets the bearing suspension requirement, and the central control module does not adjust the initial opening parameter K of the gas valve;
when A is smaller than Ab, the central control module judges that external access air pressure does not meet the bearing suspension requirement, and the central control module adjusts the opening degree of the air valve.
3. The high-speed air bearing according to claim 2, wherein when the central control module determines that the external access air pressure does not meet the bearing suspension requirement, the central control module calculates an external pressure difference Δ a, Δ a ═ Ab-a, and adjusts the opening of the air valve to K ', K' ═ K + K × Δ a × B, where B is an air pressure-to-air valve opening compensation parameter.
4. The high-speed air-bearing device according to claim 3, wherein an initial value of a compensation parameter for air pressure to air valve opening degree, which is set in the central control module, is B, an actual value bz of the compensation parameter for air pressure to air valve opening degree, which is set as B, is adjusted according to an external pressure difference value Δ AΔA×e×2/3+1And e is an adjusting parameter of the external pressure difference value delta A to the air pressure-to-air valve opening compensation parameter B, and aims to eliminate the difference value delta A unit.
5. The high-speed aerostatic bearing of claim 4, wherein an opening degree evaluation parameter value Kp is provided in the central control module, and the central control module compares the adjusted opening degree value K' with the opening degree evaluation parameter value Kp:
when K' is less than or equal to Kp, the central control module judges that the opening of the gas valve is enough to adjust the gas delivery quantity, so that the gas can well support the rotor;
when K' > Kp, the central control module determines that the gas valve opening is insufficient to adjust the gas delivery amount.
6. The high-speed gas suspension bearing according to claim 5, wherein when K '> Kp, the central control module calculates an opening degree over-difference value Δ K, where Δ K is K' -Kp;
the central control module controls the pressurizer to pressurize input gas, the pressurizer adjusts the power D of the externally-connected pressurizer for the input gas according to the opening over-difference value delta K, D is delta K multiplied by D +1, and D is an adjusting parameter of the opening over-difference value delta K on the power D of the pressurizer.
7. The high-speed air-bearing according to claim 6, wherein the central control module pressurizes the input air after determining the compressor power D, the air pressure sensor detects a pressurized air pressure value A ', and the central control module calculates a ratio G of the detected air pressure value A ' to a pressurized theoretical air pressure value AL, wherein AL is AxDxd, and G is A '/AL, and D is an ideal compensation parameter for the pressurized air pressure value from the compressor power;
the central control module compares the ratio G with a preset ratio G to judge whether the pressurization result reaches the standard or not:
when G is larger than or equal to G, the central control module judges that the pressurization result reaches the standard;
and when G is less than G, the central control module judges that the pressurization result does not reach the standard.
8. The high-speed air-bearing of claim 7, wherein when the central control module determines that the pressurization result meets the standard, the central control module compares the air pressure value A' with a standard access air pressure value Ab:
when A' is not less than Ab, the central control module judges that external access air pressure meets the bearing suspension requirement;
and when A' < Ab, the central control module judges that the external access air pressure does not meet the bearing suspension requirement, and the central control module adjusts the opening of the air valve according to the air pressure value and the air valve opening adjusting operation.
9. The high-speed air-bearing device according to claim 8, wherein when the central control module determines that the pressurization result does not meet the standard, the central control module calculates a difference Δ Az between the air pressure value a 'and the post-pressurization theoretical air pressure value AL, where Δ Az is AL-a', and the central control module adjusts the power D of the pressurization machine to D ', D' ═ dx 1 according to the difference Δ Az1+ΔAz×aAnd a is the difference value delta Az to the power compensation parameter of the pressurizer.
10. The high-speed gas suspension bearing according to claim 9, wherein when the compressor power is adjusted to D ', the central control module pressurizes the input gas, the gas pressure sensor detects a pressurized gas pressure value a ", and the central control module calculates a ratio G ', G ' ═ a"/AL of the detected gas pressure value a "to a pressurized theoretical gas pressure value AL;
the central control module compares the ratio G 'with a preset ratio G to judge whether the pressurization result reaches the standard, and when G' is larger than or equal to G, the central control module judges that the pressurization result reaches the standard; when G is less than G, the operation of adjusting the power of the pressure machine according to the difference value delta Az is repeated until G' is more than or equal to G.
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CN116292631A (en) * 2023-05-12 2023-06-23 星玛科领(山东)流体科技有限公司 Air suspension bearing with self-pressurization function
CN116292631B (en) * 2023-05-12 2023-08-08 星玛科领(山东)流体科技有限公司 Air suspension bearing with self-pressurization function

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