TW202108908A - Hydrostatic controller for maintaining constant fluid film gap - Google Patents
Hydrostatic controller for maintaining constant fluid film gap Download PDFInfo
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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
- F16C29/00—Bearings for parts moving only linearly
- F16C29/02—Sliding-contact bearings
- F16C29/025—Hydrostatic or aerostatic
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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
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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
- F16C32/0629—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 liquid cushion, e.g. oil cushion
- F16C32/064—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 liquid cushion, e.g. oil cushion the liquid being supplied under pressure
- F16C32/0644—Details of devices to control the supply of liquids to the bearings
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Abstract
Description
本發明涉及一種流體靜壓軸承系統,並且更具體,涉及一種用於在流體靜壓軸承系統中保持恒定流體薄膜間隙的流體靜壓控制器。本發明基於並要求2019 年 6 月 11 日 提交的印度申請號201941023121 和2019 年 6 月 11 日 提交的印度申請號201941023123 的優先權,所述申請的公開內容通過引用方式併入本發明。The present invention relates to a hydrostatic bearing system, and more particularly, to a hydrostatic pressure controller for maintaining a constant fluid film gap in the hydrostatic bearing system. The present disclosure is based upon and claims India Application No. June 11, 2019 and 201941023121, filed June 11, 2019, filed Application No. 201941023123 filed, said application is incorporated herein by reference.
流體靜壓軸承系統是一種非接觸型軸承系統,其將流體諸如空氣、潤滑油等流體引導至其內部,並且通過限制作用獲得負載能力。儘管流體靜壓軸承系統由於平均效應具有諸如低摩擦和高移動精度的優點,但是其具有諸如低剛度和低阻尼特性的缺點。為了提高流體靜壓軸承系統的剛度,減小軸承遊隙是有效的。另外,為了優化地設計具有較小軸承遊隙的軸承,在軸承系統中流動的流體的量應當被限制為對應於軸承遊隙。The hydrostatic bearing system is a non-contact bearing system that guides fluids such as air, lubricating oil and other fluids into it, and obtains load capacity through restriction. Although the hydrostatic bearing system has advantages such as low friction and high movement accuracy due to the averaging effect, it has disadvantages such as low stiffness and low damping characteristics. In order to improve the rigidity of the hydrostatic bearing system, it is effective to reduce the bearing clearance. In addition, in order to optimally design a bearing with a smaller bearing clearance, the amount of fluid flowing in the bearing system should be limited to correspond to the bearing clearance.
然而,當減小軸承游隙時,應提高軸承的加工精度。因此,通過減小軸承遊隙來提高軸承的剛度存在限制性。為了克服這種限制,已經提出了各種可變限制機構。However, when reducing the bearing clearance, the machining accuracy of the bearing should be improved. Therefore, there is a limit to improving the rigidity of the bearing by reducing the bearing clearance. In order to overcome this restriction, various variable restriction mechanisms have been proposed.
在一個示例中,在現有流體靜壓軸承系統中存在一種流量控制器的工作機構,該流量控制器使用串聯的平坦膜和球形膜,其中兩個不同的液流流阻具有薄限制間隙,該薄限制間隙直接連接到流體靜壓槽中的一者。在現有流體靜壓軸承系統中,常規的液流限流器是固定液流流阻,並且當流體靜壓槽中的油腔壓力變化時,流量將降低。流量方程式如下,Q = (供應壓力-油腔壓力)/(固定流阻)。In one example, there is a working mechanism of a flow controller in the existing hydrostatic bearing system. The flow controller uses a flat membrane and a spherical membrane in series, in which two different liquid flow resistances have thin restrictive gaps. The thin confinement gap is directly connected to one of the hydrostatic grooves. In the existing hydrostatic bearing system, the conventional liquid flow restrictor is a fixed flow resistance, and when the pressure of the oil cavity in the hydrostatic groove changes, the flow rate will decrease. The flow equation is as follows, Q = (supply pressure-oil chamber pressure)/(fixed flow resistance).
因此,期望解決上述缺點或其他缺陷或至少提供有用的替代方案。Therefore, it is desirable to solve the above shortcomings or other shortcomings or at least provide useful alternatives.
有鑑於此,吾等發明人乃潛心進一步研究,並著手進行研發及改良,期以一較佳發明以解決上述問題,且在經過不斷試驗及修改後而有本發明之問世。In view of this, our inventors devoted themselves to further research, and proceeded to develop and improve, hoping to develop a better invention to solve the above problems, and after continuous experimentation and modification, the present invention came out.
本發明的實施方案的主要目的是提供一種流量控制單元,用於在流體靜壓軸承系統中保持恒定流體薄膜間隙。The main purpose of the embodiments of the present invention is to provide a flow control unit for maintaining a constant fluid film gap in a hydrostatic bearing system.
本發明的實施方案的另一個目的是提供一種使用圓柱形管隔膜的流體靜壓軸承薄膜厚度控制器。Another object of the embodiments of the present invention is to provide a hydrostatic bearing film thickness controller using a cylindrical tube diaphragm.
因此,本發明的實施方案公開了一種用於保持恒定流體薄膜間隙的流體靜壓控制器。該流體靜壓控制器包括圓形構件和固定限流器。該固定限流器被構造成在流體靜壓控制器中提供固定流阻,其中固定限流器與可變限流器串聯連接。該可變限流器被構造成在流體靜壓控制器中提供可變流阻。可變限流器與油腔槽成一直線連接。固定流阻具有毛細管限流器的幾何形狀。可變流阻包括幾何形狀。該幾何形狀變形以主動地控制流體靜壓控制器中的流量,其中該幾何形狀由圓形構件提供。Therefore, the embodiment of the present invention discloses a hydrostatic pressure controller for maintaining a constant fluid film gap. The hydrostatic pressure controller includes a circular member and a fixed restrictor. The fixed restrictor is configured to provide a fixed flow resistance in the hydrostatic pressure controller, wherein the fixed restrictor is connected in series with the variable restrictor. The variable flow restrictor is configured to provide variable flow resistance in the hydrostatic pressure controller. The variable flow restrictor is connected with the oil cavity groove in a straight line. The fixed flow resistance has the geometry of a capillary flow restrictor. Variable flow resistance includes geometric shapes. The geometric shape is deformed to actively control the flow in the hydrostatic pressure controller, wherein the geometric shape is provided by a circular member.
在一個實施方案中,使用由圓形構件和環形凸台形成的遊隙提供可變流阻。In one embodiment, the play formed by the circular member and the annular boss is used to provide variable flow resistance.
在一個實施方案中,固定限流器通過可變限流器和毛細管系統與圓形構件串聯連接,以跨圓形構件產生壓力梯度。In one embodiment, the fixed restrictor is connected in series with the circular member through a variable restrictor and capillary system to generate a pressure gradient across the circular member.
在一個實施方案中,圓形構件是圓形平坦膜和圓柱形管隔膜。In one embodiment, the circular member is a circular flat membrane and a cylindrical tube diaphragm.
在一個實施方案中,流體靜壓控制器是流量控制單元或流體靜壓軸承薄膜厚度控制器。In one embodiment, the hydrostatic pressure controller is a flow control unit or a hydrostatic bearing film thickness controller.
在一個實施方案中,圓形構件是圓形平坦膜和圓柱形管隔膜。In one embodiment, the circular member is a circular flat membrane and a cylindrical tube diaphragm.
因此,本發明的實施方案公開了一種用於在流體靜壓軸承系統中保持恒定流體薄膜間隙的流量控制單元。流量控制單元包括圓形平坦膜、環形凸台和在流量控制單元中提供固定流阻的固定限流器。固定限流器與可變限流器串聯連接。可變限流器在流量控制單元中提供可變流阻,其中可變限流器與油腔槽成一直線連接。固定流阻具有毛細管限流器的幾何形狀。可變流阻包括幾何形狀,其中可變流阻的幾何形狀變形以主動控制流體靜壓軸承系統中的流量。圓形平坦膜提供可變流阻的幾何形狀。使用由圓形平坦膜和環形凸台形成的遊隙提供可變流阻。Therefore, the embodiment of the present invention discloses a flow control unit for maintaining a constant fluid film gap in a hydrostatic bearing system. The flow control unit includes a circular flat membrane, an annular boss, and a fixed restrictor that provides a fixed flow resistance in the flow control unit. The fixed current limiter is connected in series with the variable current limiter. The variable flow restrictor provides variable flow resistance in the flow control unit, wherein the variable flow restrictor is connected in line with the oil cavity groove. The fixed flow resistance has the geometry of a capillary flow restrictor. The variable flow resistance includes a geometric shape in which the geometric shape of the variable flow resistance is deformed to actively control the flow in the hydrostatic bearing system. The circular flat membrane provides a variable flow resistance geometry. The use of a clearance formed by a circular flat membrane and an annular boss provides variable flow resistance.
在一個實施方案中,固定流阻使得能夠跨圓形平坦膜形成必需的壓力差。In one embodiment, the fixed flow resistance enables the necessary pressure difference to be formed across the circular flat membrane.
在一個實施方案中,固定流阻維持跨圓形平坦膜的壓力差的正確梯度。In one embodiment, the fixed flow resistance maintains the correct gradient of the pressure difference across the circular flat membrane.
在一個實施方案中,遊隙的橫截面由圓形平坦膜的變形確定。In one embodiment, the cross-section of the clearance is determined by the deformation of the circular flat membrane.
在一個實施方案中,跨圓形平坦膜的壓力差控制圓形平坦膜中的變形量。In one embodiment, the pressure difference across the circular flat membrane controls the amount of deformation in the circular flat membrane.
在一個實施方案中,固定流阻阻塞流體流,以便控制大流量的流體流流過可變限流器。In one embodiment, a fixed flow resistance blocks fluid flow in order to control a large flow of fluid flow through the variable flow restrictor.
在一個實施方案中,在特定的供應壓力下提供遊隙。In one embodiment, the clearance is provided at a specific supply pressure.
因此,本發明的實施方案公開了一種流體靜壓軸承系統,其包括油池、卸壓閥、泵、馬達、蓄能器、過濾器、液壓動力機組、軸承槽和流量控制單元。流量控制單元包括作為可變限流器的圓形平坦膜、環形凸台和在流量控制單元中提供固定流阻的固定限流器。固定限流器與可變限流器串聯連接。可變限流器在流量控制單元中提供可變流阻,其中可變限流器與油腔槽成一直線連接。固定流阻具有毛細管限流器的幾何形狀。可變流阻包括幾何形狀,其中可變流阻的幾何形狀變形以主動控制流體靜壓軸承系統中的流量。圓形平坦膜提供可變流阻的幾何形狀。使用由圓形平坦膜和環形凸台形成的遊隙提供可變流阻。Therefore, the embodiment of the present invention discloses a hydrostatic bearing system, which includes an oil sump, a pressure relief valve, a pump, a motor, an accumulator, a filter, a hydraulic power unit, a bearing groove, and a flow control unit. The flow control unit includes a circular flat membrane as a variable flow restrictor, an annular boss, and a fixed flow restrictor that provides a fixed flow resistance in the flow control unit. The fixed current limiter is connected in series with the variable current limiter. The variable flow restrictor provides variable flow resistance in the flow control unit, wherein the variable flow restrictor is connected in line with the oil cavity groove. The fixed flow resistance has the geometry of a capillary flow restrictor. The variable flow resistance includes a geometric shape in which the geometric shape of the variable flow resistance is deformed to actively control the flow in the hydrostatic bearing system. The circular flat membrane provides a variable flow resistance geometry. The use of a clearance formed by a circular flat membrane and an annular boss provides variable flow resistance.
因此,本發明的實施方案公開了一種流體靜壓軸承薄膜厚度控制器,該流體靜壓軸承薄膜厚度控制器包括被構造成在流體靜壓軸承薄膜厚度控制器中提供固定流阻的固定限流器。固定限流器與可變限流器串聯連接。可變限流器被構造成在流體靜壓軸承薄膜厚度控制器中提供可變流阻,其中可變限流器與油腔槽成一直線連接。固定流阻包括毛細管限流器的幾何形狀。可變流阻包括幾何形狀,其中該幾何形狀變形以主動控制流體靜壓軸承薄膜厚度控制器中的流量。該幾何形狀由圓柱形管隔膜提供。固定限流器通過可變限流器和毛細管系統與圓柱形管隔膜串聯連接,以跨圓柱形管隔膜產生壓力梯度。Therefore, an embodiment of the present invention discloses a hydrostatic bearing film thickness controller that includes a fixed current limit configured to provide a fixed flow resistance in the hydrostatic bearing film thickness controller Device. The fixed current limiter is connected in series with the variable current limiter. The variable flow restrictor is configured to provide a variable flow resistance in the hydrostatic bearing film thickness controller, wherein the variable flow restrictor is connected in line with the oil cavity groove. The fixed flow resistance includes the geometry of the capillary restrictor. The variable flow resistance includes a geometric shape, where the geometric shape is deformed to actively control the flow in the hydrostatic bearing film thickness controller. This geometry is provided by the cylindrical tube diaphragm. The fixed restrictor is connected in series with the cylindrical pipe diaphragm through a variable restrictor and a capillary system to generate a pressure gradient across the cylindrical pipe diaphragm.
在一個實施方案中,圓柱形管隔膜被構造成使得跨圓柱形管隔膜的應力變化被減至最小。In one embodiment, the cylindrical tube diaphragm is configured such that stress changes across the cylindrical tube diaphragm are minimized.
在一個實施方案中,圓柱形管隔膜被構造成具有可變厚度以改善圓柱形管隔膜的彎曲特性。In one embodiment, the cylindrical tube diaphragm is configured to have a variable thickness to improve the bending characteristics of the cylindrical tube diaphragm.
在一個實施方案中,在圓柱形管隔膜內側部分上的供應壓力在圓柱形管隔膜中提供朝向薄限制遊隙的凸出。In one embodiment, the supply pressure on the inner part of the cylindrical tube diaphragm provides a protrusion in the cylindrical tube diaphragm towards the thin restricted play.
在一個實施方案中,通過可變流阻的薄限制遊隙保持圓柱形管隔膜中間隙的變化。In one embodiment, the change in the gap in the cylindrical tube diaphragm is maintained by the thin restrictive clearance of variable flow resistance.
在一個實施方案中,在圓柱形管隔膜的內側部分上的供應壓力形成狹窄的徑向遊隙部分。狹窄的徑向遊隙部分直接連接到油腔槽。In one embodiment, the supply pressure on the inner part of the cylindrical tube diaphragm forms a narrow radial clearance part. The narrow radial clearance part is directly connected to the oil cavity groove.
在一個實施方案中,圓柱形管隔膜被構造成使得變形更接近於圓柱形管隔膜的期望的平均偏轉。In one embodiment, the cylindrical tube diaphragm is configured such that the deformation is closer to the desired average deflection of the cylindrical tube diaphragm.
當結合以下描述和附圖考慮時,將更好地認識和理解本發明的實施方案的這些和其他方面。然而,應當理解,儘管以下描述指示了優選實施方案及其許多具體細節,但其是以說明而非限制的方式給出的。在不脫離本發明的精神的情況下,可以在本發明的實施方案的範圍內進行許多改變和修改,並且本發明的實施方案包括所有這樣的修改。These and other aspects of the embodiments of the present invention will be better understood and understood when considered in conjunction with the following description and drawings. However, it should be understood that although the following description indicates preferred embodiments and many specific details thereof, they are given in an illustrative rather than restrictive manner. Many changes and modifications can be made within the scope of the embodiments of the present invention without departing from the spirit of the present invention, and the embodiments of the present invention include all such modifications.
關於吾等發明人之技術手段,茲舉數種較佳實施例配合圖式於下文進行詳細說明,俾供 鈞上深入瞭解並認同本發明。Regarding the technical means of our inventors, several preferred embodiments are described in detail below in conjunction with the drawings, in order to provide a thorough understanding and approval of the present invention.
參考在附圖中示出並在以下描述中詳細描述的非限制性實施方案,更全面地解釋了本發明的實施方案及其各種特徵和有利細節。省略對已知組件和處理技術的說明以避免不必要地混淆本發明的實施方案。此外,本發明所描述的各實施方案未必相互排斥,因為一些實施方案可與一個或一個以上其他實施方案組合而形成新的實施方案。除非另外指明,術語“或”是指非排他性的“或”。本發明所用的示例僅僅旨在以本發明的實施方案可以被實現和進一步使本發明所屬技術領域中具有通常知識者能夠實現本發明的實施方案的方式來幫助理解。因此,這些示例不應被解釋為限制本發明的實施方案的範圍。The embodiments of the present invention and its various features and advantageous details are explained more fully with reference to the non-limiting embodiments shown in the drawings and described in detail in the following description. Descriptions of known components and processing techniques are omitted to avoid unnecessarily obscuring the embodiments of the present invention. In addition, the various embodiments described in the present invention are not necessarily mutually exclusive, because some embodiments may be combined with one or more other embodiments to form new embodiments. Unless otherwise specified, the term "or" refers to a non-exclusive "or". The examples used in the present invention are only intended to help understanding in a way that the embodiments of the present invention can be implemented and further enable those with ordinary knowledge in the technical field to which the present invention pertains to implement the embodiments of the present invention. Therefore, these examples should not be construed as limiting the scope of the embodiments of the present invention.
附圖用於幫助容易地理解各種技術特徵,並且應當理解,本發明提出的實施方案不受附圖的限制。因此,本發明應當被解釋為擴展到除了在附圖中具體闡述的那些之外的任何改變、等同物和替代物。儘管本發明可以使用術語第一、第二等來描述各種元件,但是這些元件不應受到這些術語的限制。這些術語一般僅用於將一個元件與另一元件相區分。The accompanying drawings are used to help easily understand various technical features, and it should be understood that the embodiments proposed by the present invention are not limited by the accompanying drawings. Therefore, the present invention should be construed as extending to any changes, equivalents, and substitutions other than those specifically set forth in the drawings. Although the present invention may use the terms first, second, etc. to describe various elements, these elements should not be limited by these terms. These terms are generally only used to distinguish one element from another element.
因此,本發明的實施方案公開了一種用於在流體靜壓軸承系統中保持恒定流體薄膜間隙的流量控制單元。流量控制單元包括圓形平坦膜、環形凸台和在流量控制單元中提供固定流阻的固定限流器。固定限流器與可變限流器串聯連接。可變限流器在流量控制單元中提供可變流阻,其中可變限流器與油腔槽成一直線連接。固定流阻具有毛細管限流器的幾何形狀。可變流阻包括幾何形狀,其中可變流阻的幾何形狀變形以主動控制流體靜壓軸承系統中的流量。圓形平坦膜提供可變流阻的幾何形狀。使用由圓形平坦膜和環形凸台形成的遊隙提供可變流阻。Therefore, the embodiment of the present invention discloses a flow control unit for maintaining a constant fluid film gap in a hydrostatic bearing system. The flow control unit includes a circular flat membrane, an annular boss, and a fixed restrictor that provides a fixed flow resistance in the flow control unit. The fixed current limiter is connected in series with the variable current limiter. The variable flow restrictor provides variable flow resistance in the flow control unit, wherein the variable flow restrictor is connected in line with the oil cavity groove. The fixed flow resistance has the geometry of a capillary flow restrictor. The variable flow resistance includes a geometric shape in which the geometric shape of the variable flow resistance is deformed to actively control the flow in the hydrostatic bearing system. The circular flat membrane provides a variable flow resistance geometry. The use of a clearance formed by a circular flat membrane and an annular boss provides variable flow resistance.
與常規方法和系統不同,流量控制單元使用圓形平坦膜控制流體靜壓軸承薄膜厚度。流量控制單元通過供應更多的流體進行補償,以增加軸承的承載能力和剛度。Unlike conventional methods and systems, the flow control unit uses a circular flat membrane to control the thickness of the hydrostatic bearing film. The flow control unit compensates by supplying more fluid to increase the bearing capacity and rigidity of the bearing.
此外,管隔膜固定在薄圓形狹槽或薄限制間隙周圍,並且與平坦膜相比具有許多優點,因為管隔膜可以容易地附接,但是平坦隔膜需要壓配合以在流體靜壓軸承薄膜厚度控制器的組件中保持在膜的邊緣。流體的流量取決於供應壓力和油腔壓力之間的壓力差以及限制遊隙的液流流阻。遊隙的液流流阻由限制間隙的變化控制,該限制間隙的變化是由固定流阻引起的管隔膜的偏轉引起的。In addition, the tube diaphragm is fixed around a thin circular slot or thin restricting gap, and has many advantages compared to a flat membrane because the tube diaphragm can be easily attached, but the flat diaphragm needs to be press-fitted to fit the thickness of the hydrostatic bearing film The components of the controller are held on the edge of the membrane. The flow rate of the fluid depends on the pressure difference between the supply pressure and the oil chamber pressure, as well as the fluid flow resistance that limits the clearance. The liquid flow resistance of the clearance is controlled by the change of the restriction gap, which is caused by the deflection of the tube diaphragm caused by the fixed flow resistance.
可變流阻的幾何形狀由圓柱形管隔膜提供,以便變形和主動地控制流體靜壓軸承薄膜厚度控制器中的流量。管隔膜的偏轉允許更多流體進入加載的油腔槽,從而調節剛度和流體靜壓系統薄膜間隙厚度。The geometry of the variable flow resistance is provided by the cylindrical tube diaphragm to deform and actively control the flow in the hydrostatic bearing film thickness controller. The deflection of the tube diaphragm allows more fluid to enter the loaded oil cavity groove, thereby adjusting the stiffness and thickness of the hydrostatic system membrane gap.
現在參照附圖,更具體地參考圖1至圖4,示出了優選實施方案。Referring now to the drawings, and more specifically to Figures 1 to 4, a preferred embodiment is shown.
圖1是根據本發明公開的實施方案的用於在流體靜壓軸承系統(200)中保持恒定流體薄膜間隙的流量控制單元(100)的橫剖視圖;Figure 1 is a cross-sectional view of a flow control unit (100) for maintaining a constant fluid film gap in a hydrostatic bearing system (200) according to an embodiment of the present disclosure;
一般來講,由於流體靜壓軸承系統(200)能夠實現高剛度,因此需要流體靜壓軸承系統(200)。為了實現高剛度,需要流量控制單元(100)以在流體靜壓軸承系統(200)中保持恒定流體薄膜間隙。在一個實施方案中,流量控制單元(100)包括圓形平坦膜(102)、環形凸台(104)以及被構造成在流量控制單元(100)中提供固定流阻的固定限流器(106)。固定限流器(106)與可變限流器(108)串聯連接。可變限流器(108)被構造成在流量控制單元(100)中提供可變流阻。可變限流器(108)與油腔槽(112)(即軸承槽)成一直線連接。固定流阻和可變流阻有助於調節流量控制單元(100)中的流體流。固定流阻具有毛細管限流器的幾何形狀。可變流阻包括可變形並由此主動控制流量的幾何形狀。圓形平坦膜(102)提供可變流阻的幾何形狀。固定流阻使得能夠跨圓形平坦膜(102)形成必要的壓力差,使得圓形平坦膜(102)能夠如預期變形。固定流阻還會阻塞流量,以防止大流量的流體流過固定流阻。固定流阻還有助於保持跨圓形平坦膜(102)的正確壓力差梯度,以使圓形平坦膜(102)不會在與預期相反的方向上偏轉。Generally speaking, since the hydrostatic bearing system (200) can achieve high rigidity, the hydrostatic bearing system (200) is required. In order to achieve high stiffness, a flow control unit (100) is required to maintain a constant fluid film gap in the hydrostatic bearing system (200). In one embodiment, the flow control unit (100) includes a circular flat membrane (102), an annular boss (104), and a fixed restrictor (106) configured to provide a fixed flow resistance in the flow control unit (100) ). The fixed restrictor (106) is connected in series with the variable restrictor (108). The variable flow restrictor (108) is configured to provide a variable flow resistance in the flow control unit (100). The variable flow restrictor (108) is connected with the oil cavity groove (112) (namely, the bearing groove) in a straight line. The fixed flow resistance and the variable flow resistance help to regulate the fluid flow in the flow control unit (100). The fixed flow resistance has the geometry of a capillary flow restrictor. Variable flow resistance includes geometric shapes that can be deformed and thereby actively control flow. The circular flat membrane (102) provides a variable flow resistance geometry. The fixed flow resistance enables the necessary pressure difference to be formed across the circular flat membrane (102) so that the circular flat membrane (102) can be deformed as expected. The fixed flow resistance also blocks the flow to prevent a large flow of fluid from flowing through the fixed flow resistance. The fixed flow resistance also helps to maintain the correct pressure difference gradient across the circular flat membrane (102) so that the circular flat membrane (102) does not deflect in the opposite direction as expected.
此外,經由由圓形平坦膜(102)和環形凸台(104)形成的遊隙(110)實現可變流阻。遊隙(110)被優化以在25巴的給定操作供應壓力下獲得最佳性能。遊隙(110)的橫截面由膜變形的大小決定。膜的變形越高,遊隙橫截面積越小。跨圓形平坦膜(102)的壓差有助於控制圓形平坦膜(102)的變形量,進而控制遊隙(110)。當軸承間隙改變時,控制單元(100)的可變流阻中的薄限制遊隙改變,以補償間隙的改變。負載的增加會增加油腔壓力,從而減小軸承薄膜間隙。控制單元(100)通過供應更多的流體進行補償,以增加軸承的承載能力和剛度。這表示壓力和流體流量之間的正斜率,其導致理想的性能,並且這是經由控制單元(100)實現的。In addition, a variable flow resistance is realized via a play (110) formed by a circular flat film (102) and an annular boss (104). The clearance (110) is optimized for best performance at a given operating supply pressure of 25 bar. The cross section of the clearance (110) is determined by the size of the membrane deformation. The higher the deformation of the membrane, the smaller the cross-sectional area of the clearance. The pressure difference across the circular flat membrane (102) helps to control the amount of deformation of the circular flat membrane (102), thereby controlling the clearance (110). When the bearing clearance changes, the thin limit clearance in the variable flow resistance of the control unit (100) changes to compensate for the change in clearance. The increase of the load will increase the pressure of the oil chamber, thereby reducing the bearing film gap. The control unit (100) compensates by supplying more fluid to increase the bearing capacity and rigidity of the bearing. This represents a positive slope between pressure and fluid flow, which leads to ideal performance, and this is achieved via the control unit (100).
隨著油腔壓力增加,流量控制單元(100)使用可變限流器引起流量的同時增加。這有助於保持軸承間隙高度以獲得足夠的剛度,從而使流體靜壓軸承系統(200)可以提供所需的精度和準確性。As the oil chamber pressure increases, the flow control unit (100) uses a variable flow restrictor to cause the flow to increase at the same time. This helps maintain the bearing clearance height to obtain sufficient rigidity so that the hydrostatic bearing system (200) can provide the required precision and accuracy.
此外,圓形平坦膜(102)的厚度和限制間隙可用於控制可變流阻的性能。圓形平坦膜(102)易於安裝和固定。該設計易於製造和實施。In addition, the thickness of the circular flat membrane (102) and the restricted gap can be used to control the performance of the variable flow resistance. The round flat film (102) is easy to install and fix. The design is easy to manufacture and implement.
流量控制單元(100)的模型已在實驗室中使用流體靜壓軸承測試裝備進行了測試。輸出性能顯示當負載增加時流量的增加,該負載增加了油腔壓力並且傾向於增加軸承槽的液流流阻,並且流體靜壓軸承薄膜厚度將開始減小。這可以通過由外部流量控制機構增加流量來防止。使用隔膜降低軸承槽的液流流阻將有助於保持恒定的薄膜厚度並實現期望的性能。The model of the flow control unit (100) has been tested in the laboratory using hydrostatic bearing test equipment. The output performance shows that the flow rate increases when the load increases, the load increases the oil chamber pressure and tends to increase the flow resistance of the bearing groove, and the thickness of the hydrostatic bearing film will begin to decrease. This can be prevented by increasing the flow rate by an external flow control mechanism. Using a diaphragm to reduce the flow resistance of the bearing groove will help maintain a constant film thickness and achieve the desired performance.
圖2是根據本發明公開的實施方案的流體靜壓軸承系統(200)的示意圖。流體靜壓軸承系統(200)包括液壓動力機組(214)、油池(202)、卸壓閥(204)、泵(206)、馬達(208)、蓄能器(210)、過濾器(212)和軸承槽(216)和流量控制單元(100)。液壓動力機組(214)用於對油加壓,油產生供應壓力(Ps)。加壓的油被供應到具有固定流阻(106)和可變流阻(102)的流量控制單元(100)。油通過流量控制單元(100)並前進到產生油腔壓力(Pr)的油腔槽(112)。Figure 2 is a schematic diagram of a hydrostatic bearing system (200) according to an embodiment of the present disclosure. The hydrostatic bearing system (200) includes a hydraulic power unit (214), an oil sump (202), a pressure relief valve (204), a pump (206), a motor (208), an accumulator (210), and a filter (212) ) And bearing groove (216) and flow control unit (100). The hydraulic power unit (214) is used to pressurize the oil, and the oil generates the supply pressure (Ps). The pressurized oil is supplied to a flow control unit (100) having a fixed flow resistance (106) and a variable flow resistance (102). The oil passes through the flow control unit (100) and advances to the oil chamber groove (112) where the oil chamber pressure (Pr) is generated.
圖3是串聯連接並組裝為單個單元的多個流量控制單元(100)的橫剖視圖,該單個單元連接到流體靜壓軸承系統(200)。已經結合圖1和圖2解釋了流量控制單元(100)的佈置和功能。Figure 3 is a cross-sectional view of a plurality of flow control units (100) connected in series and assembled into a single unit connected to a hydrostatic bearing system (200). The arrangement and function of the flow control unit (100) have been explained in conjunction with Fig. 1 and Fig. 2.
流體靜壓軸承系統(200)的承載能力和剛度取決於流量控制單元(100)的固定流阻。毛細管限流器用作固定限流器(106),並且固定限流器(106)的參數主要是毛細管的直徑和毛細管的長度。The bearing capacity and stiffness of the hydrostatic bearing system (200) depend on the fixed flow resistance of the flow control unit (100). The capillary restrictor is used as the fixed restrictor (106), and the parameters of the fixed restrictor (106) are mainly the diameter of the capillary and the length of the capillary.
圖4是根據本發明公開的實施方案的流體靜壓軸承薄膜厚度控制器(400)的橫剖視圖。在一個實施方案中,流體靜壓軸承薄膜厚度控制器(400)包括被構造成在流體靜壓軸承薄膜厚度控制器(400)中提供固定流阻的固定限流器(402)。固定限流器(402)與可變限流器(404)串聯連接。可變限流器(404)被構造成在流體靜壓軸承薄膜厚度控制器(400)中提供可變流阻,其中可變限流器(404)與油腔槽(410)成一直線連接。Fig. 4 is a cross-sectional view of a hydrostatic bearing film thickness controller (400) according to an embodiment of the present disclosure. In one embodiment, the hydrostatic bearing film thickness controller (400) includes a fixed flow restrictor (402) configured to provide a fixed flow resistance in the hydrostatic bearing film thickness controller (400). The fixed restrictor (402) is connected in series with the variable restrictor (404). The variable flow restrictor (404) is configured to provide a variable flow resistance in the hydrostatic bearing film thickness controller (400), wherein the variable flow restrictor (404) and the oil cavity groove (410) are connected in a line.
此外,固定流阻具有毛細管限流器的幾何形狀。該可變流阻包括可變形並由此主動控制流量的幾何形狀。可變限流器的幾何形狀由圓柱形管隔膜(406)提供。使用毛細管系統建模的固定限流器(402)與圓柱形管隔膜(406)的可變流阻串聯連接,以跨圓柱形管隔膜(406)產生壓力梯度。In addition, the fixed flow resistance has the geometry of a capillary flow restrictor. The variable flow resistance includes a geometric shape that is deformable and thereby actively controls the flow rate. The geometry of the variable restrictor is provided by the cylindrical tube diaphragm (406). A fixed restrictor (402) modeled using a capillary system is connected in series with the variable flow resistance of the cylindrical tube diaphragm (406) to generate a pressure gradient across the cylindrical tube diaphragm (406).
圓柱形管隔膜(406)的設計使得跨圓柱形管隔膜(406)的應力變化被減至最小。圓柱形管隔膜(406)的長度(411)被設計為具有可變厚度以改善其彎曲特性。該圓柱形管隔膜(406)在圓筒(414)的邊緣上具有較小橫截面厚度(412),該橫截面厚度漸縮並增加以在另一圓筒(413)的中間部分形成較厚的橫截面。圓柱形管隔膜(406)被設計成使得變形更接近於圓柱形管隔膜(406)的期望的平均偏轉,而不是沿其長度具有不均勻的變形。管隔膜(406)內側上的供應壓力導致管隔膜(406)朝向薄限制遊隙(408)凸出。薄限制遊隙(408)直接連接到軸承的油腔槽(410),隨著進入的油腔壓力變化而變化。管隔膜(406)的偏轉允許更多流體進入加載的油腔槽,從而調節剛度和流體靜壓系統薄膜間隙厚度。當軸承間隙發生變化時,可變流阻中的薄限制遊隙(408)(即環形凸台間隙)改變以補償間隙的變化。負載的增加會增加油腔壓力,從而減小軸承薄膜間隙。流體靜壓軸承薄膜厚度控制器(400)通過供應更多的流體進行補償,以增加軸承的承載能力和剛度。這表示壓力和流體流量之間的正斜率,其導致理想的性能,並且這是經由流體靜壓軸承薄膜厚度控制器(400)實現的。The design of the cylindrical tube diaphragm (406) minimizes the stress variation across the cylindrical tube diaphragm (406). The length (411) of the cylindrical tube diaphragm (406) is designed to have a variable thickness to improve its bending characteristics. The cylindrical tube diaphragm (406) has a smaller cross-sectional thickness (412) on the edge of the cylinder (414), and the cross-sectional thickness is tapered and increased to form a thicker part in the middle of the other cylinder (413). cross section. The cylindrical tube diaphragm (406) is designed so that the deformation is closer to the desired average deflection of the cylindrical tube diaphragm (406), rather than having uneven deformation along its length. The supply pressure on the inside of the tube diaphragm (406) causes the tube diaphragm (406) to bulge toward the thin restricted play (408). The thin limiting clearance (408) is directly connected to the oil cavity groove (410) of the bearing and changes with the pressure of the entering oil cavity. The deflection of the tube diaphragm (406) allows more fluid to enter the loaded oil cavity groove, thereby adjusting the stiffness and the thickness of the hydrostatic system membrane gap. When the bearing clearance changes, the thin limiting clearance (408) in the variable flow resistance (that is, the annular boss clearance) changes to compensate for the change in clearance. The increase of the load will increase the pressure of the oil chamber, thereby reducing the bearing film gap. The hydrostatic bearing film thickness controller (400) compensates by supplying more fluid to increase the bearing capacity and rigidity of the bearing. This represents a positive slope between pressure and fluid flow, which leads to ideal performance, and this is achieved via the hydrostatic bearing film thickness controller (400).
可變厚度減小了在保持平均偏轉恒定時可獲得的最大偏轉,因此其可以減小最大間隙而不會阻塞流體通道,從而實現平均間隙厚度的更大百分比。The variable thickness reduces the maximum deflection that can be obtained while keeping the average deflection constant, so it can reduce the maximum gap without blocking the fluid passage, thereby achieving a greater percentage of the average gap thickness.
管隔膜(406)固定在薄圓形狹槽或薄限制間隙周圍,並且與平坦膜相比具有許多優點,因為管隔膜(406)可以容易地附接,但是平坦隔膜需要壓配合以在流體靜壓軸承薄膜厚度控制器(400)的組件中保持在膜的邊緣。流體的流量取決於供應壓力和油腔壓力之間的壓力差以及限制遊隙的液流流阻。遊隙的液流流阻由限制間隙的變化控制,該限制間隙的變化是由固定流阻引起的管隔膜的偏轉引起的。The tube diaphragm (406) is fixed around a thin circular slot or thin restricting gap, and has many advantages compared to a flat membrane because the tube diaphragm (406) can be easily attached, but the flat diaphragm needs to be press-fitted in order to The pressure bearing film thickness controller (400) is held on the edge of the film in the assembly. The flow rate of the fluid depends on the pressure difference between the supply pressure and the oil chamber pressure, as well as the fluid flow resistance that limits the clearance. The liquid flow resistance of the clearance is controlled by the change of the restriction gap, which is caused by the deflection of the tube diaphragm caused by the fixed flow resistance.
流體靜壓軸承薄膜厚度控制器(400)已經在實驗室製造的單槽流體靜壓軸承測試裝備中進行了測試,在該測試裝備中,隨著軸承槽的液流流阻而趨於增加的油腔壓力是變化的。然後,流體靜壓軸承薄膜厚度開始減小,這可以通過經由外部流量控制機構(即管隔膜)增加流量來防止,以減小將保持恒定薄膜厚度的軸承槽的液流流阻。The hydrostatic bearing film thickness controller (400) has been tested in a single-slot hydrostatic bearing test equipment manufactured in the laboratory. In this test equipment, the fluid flow resistance of the bearing groove tends to increase. The pressure in the oil chamber changes. Then, the hydrostatic bearing film thickness starts to decrease, which can be prevented by increasing the flow rate via an external flow control mechanism (ie, tube diaphragm) to reduce the flow resistance of the bearing groove that will maintain a constant film thickness.
可以使用在至少一個硬件設備上運行並執行網絡管理功能以控制元件的至少一個軟件程序來實現本發明的實施方案。The embodiments of the present invention may be implemented using at least one software program that runs on at least one hardware device and performs network management functions to control the elements.
具體實施方案的上述描述將充分揭示本發明的實施方案的一般性質,使得在不脫離一般概念的情況下,其他人可通過應用當前知識容易地修改和/或調整此類具體實施方案以用於各種應用,並且因此此類調整和修改應當且旨在包含在所公開的實施方案的等效物的含義和範圍內。應當理解,本發明中採用的措辭或術語是為了描述的目的,而不是為了限制。因此,儘管已經根據優選實施方案描述了本發明的實施方案,但是本發明所屬技術領域中具有通常知識者將認識到,本發明的實施方案可通過在本發明所描述的實施方案的精神和範圍內的修改而被實現。The above description of specific embodiments will fully reveal the general nature of the embodiments of the present invention, so that others can easily modify and/or adjust such specific embodiments for use without departing from the general concept. Various applications, and therefore such adjustments and modifications should and are intended to be included in the meaning and scope of equivalents of the disclosed embodiments. It should be understood that the wording or terminology used in the present invention is for the purpose of description, not for limitation. Therefore, although the embodiments of the present invention have been described in terms of preferred embodiments, those with ordinary knowledge in the technical field to which the present invention pertains will recognize that the embodiments of the present invention can be adopted within the spirit and scope of the described embodiments of the present invention. The modifications within are implemented.
綜上所述,本發明所揭露之技術手段確能有效解決習知等問題,並達致預期之目的與功效,且申請前未見諸於刊物、未曾公開使用且具長遠進步性,誠屬專利法所稱之發明無誤,爰依法提出申請,懇祈 鈞上惠予詳審並賜准發明專利,至感德馨。In summary, the technical means disclosed in the present invention can effectively solve the conventional problems and achieve the expected purpose and effect. It has not been seen in the publications, has not been used publicly, and has long-term progress before the application. The patent law claims that the invention is correct. Yan filed an application in accordance with the law and prayed that Jun Shanghui would give a detailed examination and grant a patent for invention.
惟以上所述者,僅為本發明之數種較佳實施例,當不能以此限定本發明實施之範圍,即大凡依本發明申請專利範圍及發明說明書內容所作之等效變化與修飾,皆應仍屬本發明專利涵蓋之範圍內。However, the above are only a few preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention, that is, all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the content of the description of the invention are all It should still fall within the scope of the invention patent.
〔本發明〕 100:流量控制單元 102:圓形平坦膜 104:環形凸台 106:固定限流器 108:可變限流器 110:遊隙 112:油腔槽 200:流體靜壓軸承系統 202:油池 204:卸壓閥 206:泵 208:馬達 210:蓄能器 212:過濾器 214:液壓動力機組 216:軸承槽 400:流體靜壓軸承薄膜厚度控制器 402:固定限流器 404:可變限流器 406:圓柱形管隔膜 408:薄限制遊隙 410:油腔槽 411:長度 412:較小橫截面厚度 413:另一圓筒 414:圓筒〔this invention〕 100: flow control unit 102: round flat film 104: Ring boss 106: fixed restrictor 108: Variable flow restrictor 110: Clearance 112: oil cavity groove 200: Hydrostatic bearing system 202: oil pool 204: Pressure relief valve 206: Pump 208: Motor 210: Accumulator 212: filter 214: Hydraulic power unit 216: bearing groove 400: Hydrostatic bearing film thickness controller 402: fixed restrictor 404: Variable flow restrictor 406: Cylindrical tube diaphragm 408: Thin limit clearance 410: oil cavity groove 411: length 412: Smaller cross-sectional thickness 413: Another cylinder 414: cylinder
[圖1]是根據本發明公開的實施方案的用於在流體靜壓軸承系統中保持恒定流體薄膜間隙的流量控制單元的橫剖視圖; [圖2]是根據本發明公開的實施方案的流體靜壓軸承系統的示意圖; [圖3]是根據本發明公開的實施方案的串聯連接並組裝為單個單元的多個流量控制單元的橫剖視圖,該單個單元連接到流體靜壓軸承系統; [圖4]是根據本發明公開的實施方案的流體靜壓軸承薄膜厚度控制器的橫剖視圖。[Figure 1] is a cross-sectional view of a flow control unit for maintaining a constant fluid film gap in a hydrostatic bearing system according to an embodiment of the present disclosure; [Figure 2] is a schematic view of a hydrostatic bearing system according to an embodiment of the present disclosure; [Figure 3] is a cross-sectional view of a plurality of flow control units connected in series and assembled into a single unit according to an embodiment of the present disclosure, the single unit being connected to a hydrostatic bearing system; [Fig. 4] is a cross-sectional view of a hydrostatic bearing film thickness controller according to an embodiment of the present disclosure.
102:圓形平坦膜 102: round flat film
104:環形凸台 104: Ring boss
106:固定限流器 106: fixed restrictor
108:可變限流器 108: Variable flow restrictor
110:遊隙 110: Clearance
112:油腔槽 112: oil cavity groove
Claims (36)
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IN201941023123 | 2019-06-11 |
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US3112764A (en) * | 1960-10-28 | 1963-12-03 | Bendix Corp | Flow-regulating valve |
DE19737781A1 (en) * | 1997-08-29 | 1999-03-11 | Robert Schoenfeld | Regulator for regulating at least one hydrostatic or aerostat pocket of a bearing, threaded spindle nut or a media flow supplied to a guide |
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