Throttling device and static pressure device

Abstract

The application discloses a flow restrictor and a static pressure device, and the static pressure device comprises the flow restrictor, the flow restrictor comprises a base, a diaphragm and a cover plate. The base is provided with a first side face and a second side face which are oppositely arranged, the first side face is provided with a flow-restricting groove, an oil supply channel is formed in the flow-restricting groove, the oil supply channel extends from the first side face to the second side face, an oil inlet channel is formed in the base and extends from the first side face to the second side face. The diaphragm is arranged in the flow-restricting groove, and the diaphragm and the flow-restricting groove form a first chamber. The cover plate is arranged on the first side face and surrounds the diaphragm and the inner wall surface of the flow-restricting groove to form a second chamber. The oil inlet channel is communicated with the second chamber, the inner wall surface of the flow-restricting groove is provided with a first pressure drop channel, and the first pressure drop channel is communicated with the oil inlet channel and the first chamber. The application at least solves the problems of complex structure and high processing cost of the flow restrictor in the prior art.

Description

Technical Field

[0001] This application relates to the field of precision machine tool technology, and more specifically, to a throttle and static pressure device. Background Technology

[0002] Hydrostatic equipment includes hydrostatic guide rails and hydrostatic turntables, and typically requires a flow regulator. In related technologies, flow regulators include diaphragm feedback flow regulators, which can automatically adjust the oil flow rate according to the load on the hydrostatic equipment.

[0003] However, the thin-film feedback throttling device in the related technology requires a complex throttling channel to be opened on the side connected to the predetermined structure of the static pressure equipment in order to complete the feedback regulation. The structure is complex and the processing cost is high. Summary of the Invention

[0004] The main objective of this application is to provide a throttle and static pressure device to solve the problems of complex structure and high processing cost of throttles in related technologies.

[0005] According to one aspect of this application, a throttle is provided, comprising: The base has a first side and a second side disposed opposite to each other. A throttling groove is provided on the first side, and an oil supply channel is provided in the throttling groove. The oil supply channel extends from the first side to the second side. An oil inlet channel is provided on the base, and the oil inlet channel extends from the first side to the second side. A thin film is disposed within the throttling groove, and the thin film and the throttling groove together form a first chamber; A cover plate is provided on the first side and forms a second chamber with the inner wall of the diaphragm sheet and the throttling groove; The oil inlet channel is connected to the second chamber, and the inner wall of the throttling groove is provided with a first pressure drop channel, which connects the oil inlet channel and the first chamber.

[0006] In some embodiments, a second pressure drop channel is connected between the first chamber and the oil supply channel.

[0007] In some embodiments, a throttling boss is provided in the center of the throttling groove, and the oil supply channel is provided on the throttling boss. The diaphragm sheet and the space inside the throttling groove located outside the throttling boss form the first chamber, and the second pressure drop channel is provided on the side wall of the throttling boss.

[0008] In some embodiments, an annular boss is provided in the throttling groove, the annular boss is located on the outer periphery of the throttling boss, and the diaphragm sheet overlaps the annular boss; Wherein, along the depth direction of the throttling groove, the protrusion height of the annular boss is higher than the protrusion height of the throttling boss, so that there is a gap between the diaphragm sheet and the throttling boss.

[0009] In some embodiments, the first pressure drop channel includes a first capillary tube, the ratio of the length L1 to the inner diameter D1 of the first capillary tube satisfying the relationship: L1 / D1 > 10; and / or, The second pressure drop channel includes a second capillary tube, and the ratio of the length L2 to the inner diameter D2 of the second capillary tube satisfies the relationship: L2 / D2 > 10.

[0010] In some embodiments, the inner diameter D1 of the first capillary tube satisfies the relationship: 0.2mm ≤ D1 ≤ 0.6mm; and / or, The inner diameter D2 of the second capillary tube satisfies the following relationship: 0.2mm≤D2≤0.6mm.

[0011] In some embodiments, the cover plate has a protrusion on the side near the base, the protrusion abutting against the diaphragm, so that the cover plate, the diaphragm, and the inner wall of the throttling groove form the second chamber.

[0012] In some embodiments, the cover plate is provided with a positioning boss adapted to the throttling groove, and the positioning boss protrudes into the groove; The protrusion includes a protruding section that protrudes from the center of the positioning boss and abuts against the diaphragm to form the second chamber between the positioning boss, the diaphragm, and the inner wall of the throttling groove.

[0013] In some embodiments, an annular oil injection groove is provided on the second side, and the oil inlet channel is provided at the bottom of the annular oil injection groove.

[0014] On the other hand, this application also provides a static pressure device, which includes the aforementioned throttle.

[0015] Compared to existing technologies that require complex throttling channels on the second side, this application only requires opening a first pressure drop channel connecting the oil inlet channel and the first chamber on the wall of the throttling groove. This allows the throttler to automatically adjust the amount of oil flowing out of the throttler according to the load on the hydrostatic equipment. The structure is simple and the processing cost is low. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, are illustrative and descriptive, serving to explain this application and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the throttle disclosed in the embodiments of this application; Figure 2 This is a schematic diagram of the base disclosed in the embodiments of this application from a first-view perspective; Figure 3 This is a schematic diagram of the base disclosed in the embodiments of this application from a second perspective; Figure 4 This is a cross-sectional view of the throttle device disclosed in an embodiment of this application; Figure 5 This is a schematic diagram of the structure of the first pressure drop channel (second pressure drop channel) disclosed in the embodiments of this application.

[0017] The above figures include the following reference numerals: 11. Base; 12. Cover plate; 20. Diaphragm sheet; 30. Plug; 40. First seal; 50. Second seal; 101. Oil inlet channel; 102. Oil supply channel; 103. First pressure drop channel; 104. Second pressure drop channel; 105. First chamber; 106. Second chamber; 107. Gap; 111. First side; 112. Second side; 121. Protrusion; 122. Positioning boss; 1111. Throttling groove; 1112. Throttling boss; 1113. Annular boss; 1121. Annular oil injection groove; 1211. Protruding section. Detailed Implementation

[0018] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] To address the problems existing in the relevant technologies, see [link to relevant documentation]. Figures 1 to 4 As shown in the figure, this application provides a static pressure device, which includes a throttle, a base 11, a diaphragm sheet 20 and a cover plate 12.

[0022] The base 11 has a first side 111 and a second side 112 arranged opposite to each other. A throttling groove 1111 is provided on the first side 111, and an oil supply channel 102 is formed within the throttling groove 1111, extending from the first side 111 to the second side 112. An oil inlet channel 101 is also provided on the base 11, extending from the first side 111 to the second side 112. A diaphragm sheet 20 is disposed within the throttling groove 1111, and the diaphragm sheet 20 and the throttling groove 1111 together form a first chamber 105. A cover plate 12 is placed on the first side 111, and together with the diaphragm sheet 20 and the inner wall of the throttling groove 1111, forms a second chamber 106. The oil inlet channel 101 is connected to the second chamber 106, and the inner wall of the throttling groove 1111 is provided with a first pressure drop channel 103, which is connected to the oil inlet channel 101 and the first chamber 105.

[0023] In this application, when the hydrostatic equipment is unloaded, the oil reaches the throttle and enters the second chamber 106 through the oil inlet channel 101, and simultaneously enters the first chamber 105 through the first pressure drop channel 103. Because the oil encounters resistance through the first pressure drop channel 103, the pressure of the oil in the first chamber 105 is lower than the pressure of the oil in the second chamber 106. This causes the diaphragm 20 to deform along the bottom surface of the groove near the throttle groove 1111 due to the pressure difference, thereby reducing the distance between the diaphragm 20 and the oil supply channel 102, as well as the overall volume of the first chamber 105, ultimately reducing the flow rate of the oil flowing out of the oil supply channel 102. When the load on the hydrostatic equipment increases, the oil in the oil supply channel 102 will be subjected to the reverse pressure applied by the load on the hydrostatic equipment, thereby increasing the pressure of the oil in the first chamber 105. The diaphragm 20 rebounds under the pressure of the oil in the first chamber 105, thereby increasing the distance between the diaphragm 20 and the oil supply channel 102 and the overall volume of the first chamber 105, ultimately increasing the flow rate of the oil flowing out of the oil supply channel 102.

[0024] Compared to the existing technology that requires a complex throttling channel to be opened on the second side 112, this application only needs to open a first pressure drop channel 103 connecting the oil inlet channel 101 and the first chamber 105 on the inner wall of the throttling groove 1111. This allows the throttler to automatically adjust the amount of oil flowing out of the throttler according to the load on the hydrostatic equipment. The structure is simple and the processing cost is low.

[0025] It is known that if the oil pressure in the oil inlet channel 101 is too high, the diaphragm 20 may block the oil supply channel 102, thereby preventing the throttle from outputting oil and potentially damaging the hydrostatic equipment. To solve this problem, in some embodiments, a second pressure drop channel 104 is connected between the first chamber 105 and the oil supply channel 102.

[0026] Specifically, since the second pressure drop channel 104 connects the first chamber 105 and the oil supply channel 102, even if the diaphragm 20 closes the oil supply channel 102, the oil entering the first chamber 105 through the first pressure drop channel 103 can still enter the oil supply channel 102 through the second pressure drop channel 104. This allows the throttle to output a certain amount of oil, ensuring an oil film on the hydrostatic equipment and preventing damage to the equipment. On the other hand, when there is a certain load on the hydrostatic equipment, the pressure exerted by the load on the oil film can not only act on the diaphragm 20 through the oil supply channel 102, but also be transmitted through the oil in the second pressure drop channel 104, ultimately increasing the pressure of the oil in the first chamber 105. The purpose of setting the second pressure drop channel 104 is, on the one hand, to ensure that the throttle has a minimum oil supply; on the other hand, to prevent the oil pressure in the oil inlet channel 101 from becoming too high, causing the diaphragm 20 to close the oil supply channel 102. When a load is present on the hydrostatic equipment, the second pressure drop channel 104 increases the pressure exerted by the oil in the first chamber 105 on the diaphragm 20, which can, to some extent, prevent the diaphragm 20 from completely sealing the oil supply channel 102. It is understood that the oil flowing out of the throttle in this embodiment is subject to two parts of hydraulic resistance: the first part is caused by the first pressure drop channel 103, and the second part is caused by the combined effect of the second pressure drop channel 104 and the diaphragm 20. In the second part of the hydraulic resistance, the resistance provided by the second pressure drop channel 104 is constant, while the resistance from the diaphragm 20 can change with the load. Furthermore, the hydraulic resistance provided by the second pressure drop channel 104 and the resistance from the diaphragm 20 are in parallel, meaning that the second part of the hydraulic resistance will not be zero. This prevents the pressure of the oil output from the throttle from being too low, thus avoiding the problem that the rigidity of the oil film on the hydrostatic equipment is insufficient to support the hydrostatic equipment.

[0027] In some embodiments, a throttling boss 1112 is provided in the center of the throttling groove 1111, and an oil supply channel 102 is provided on the throttling boss 1112. The diaphragm sheet 20 and the space located outside the throttling boss 1112 in the throttling groove 1111 form a first chamber 105, and a second pressure drop channel 104 is provided on the side wall of the throttling boss 1112.

[0028] Specifically, if the throttling boss 1112 is not provided in the center of the throttling groove 1111, it may cause the first chamber 105 to be completely compressed when the diaphragm 20 completely closes the opening of the oil supply channel 102. At this time, the first chamber 105 disappears, and the oil in the first pressure drop channel 103 directly enters the second chamber 106, causing the throttler to be unable to automatically adjust the flow rate of the throttler according to the load on the hydrostatic equipment. However, in this embodiment, since the throttling boss 1112 is provided in the center of the throttling groove 1111, and the space between the diaphragm 20 and the throttling groove 1111 outside the throttling boss 1112 forms the first chamber 105, this means that regardless of whether the diaphragm 20 closes the oil supply channel 102, the oil can always enter the first chamber 105 through the first pressure drop channel 103. Meanwhile, since the second pressure drop channel 104 is located on the side wall of the throttling boss 1112, the oil in the first chamber 105 can always enter the oil supply channel 102 through the second pressure drop channel 104.

[0029] In some embodiments, an annular boss 1113 is provided within the throttling groove 1111, and the annular boss 1113 is located on the outer periphery of the throttling boss 1112, with the diaphragm sheet 20 overlapping the annular boss 1113. Along the depth direction of the throttling groove 1111, the protrusion height of the annular boss 1113 is higher than the protrusion height of the throttling boss 1112, so that there is a gap 107 between the diaphragm sheet 20 and the throttling boss 1112.

[0030] Specifically, the diaphragm 20 overlaps with the annular boss 1113, forming a first chamber 105 between the diaphragm 20, the annular boss 1113, and the throttling groove 1111, and forming a second chamber 106 between the diaphragm 20, the throttling groove 1111, and the cover plate 12. Furthermore, since the protrusion height of the annular boss 1113 is higher than that of the throttling boss 1112 along the depth direction of the throttling groove 1111, a gap 107 exists between the diaphragm 20 and the throttling boss 1112. In actual operation of the throttling device, the size of the gap 107 between the diaphragm 20 and the throttling boss 1112 varies depending on the load on the hydrostatic equipment. For example, when there is no load on the hydrostatic equipment or the oil pressure in the oil inlet channel 101 is too high, the diaphragm 20 deforms towards the bottom surface of the throttling groove 1111, thereby reducing the gap 107 between the diaphragm 20 and the throttling boss 1112, thus increasing the oil pressure in the first chamber 105 and reducing the flow rate of oil entering the oil supply channel 102. Conversely, when the load on the hydrostatic equipment is large, and the pressure exerted by the load on the oil in the oil supply channel 102 is greater than the pressure of the oil in the oil inlet channel 101, the diaphragm 20 deforms away from the bottom surface of the throttling groove 1111, thereby increasing the gap 107 between the diaphragm 20 and the throttling boss 1112, reducing the oil pressure in the first chamber 105, and increasing the flow rate of oil entering the oil supply channel 102. Furthermore, the annular boss 1113 ensures that the diaphragm 20 is subjected to symmetrical forces and uniform deformation, preventing eccentric loading of the diaphragm 20.

[0031] In some embodiments, the first pressure drop channel 103 includes a first capillary tube, the ratio of the length L1 of the first capillary tube to its inner diameter D1 satisfies the relationship: L1 / D1 > 10. The second pressure drop channel 104 includes a second capillary tube, the ratio of the length L2 of the second capillary tube to its inner diameter D2 satisfies the relationship: L2 / D2 > 10.

[0032] In this embodiment, both the first and second capillary channels are circular. According to Poiseuille's laminar flow law, when the length-to-diameter ratio of the first and second capillary channels is greater than 10, it ensures that the oil within them remains in a laminar flow state, preventing turbulence and pressure fluctuations caused by turbulence, and mitigating nonlinear oscillations in the feedback control of the flow regulator. In this embodiment, L1 / D1 can be 15, 20, 25, 30, or 40, and L2 / D2 can be 15, 20, 25, 30, 35, or 40.

[0033] In some embodiments, the inner diameter D1 of the first capillary tube satisfies the relationship: 0.2mm ≤ D1 ≤ 0.6mm. Specifically, when D1 is less than 0.2mm, the hydraulic resistance of the first capillary tube is too high, which may make it difficult for oil to enter the first chamber 105 through the first capillary tube, and the inner diameter of the first capillary tube is too small, resulting in excessively high processing costs. When D1 is greater than 0.6mm, on the one hand, the inner diameter is too large, causing the first capillary tube to fail to generate resistance to the oil; on the other hand, an excessively large first capillary tube will increase the overall volume of the throttle accordingly. Therefore, when D1 satisfies the above relationship, the first capillary tube can have a certain hydraulic resistance, thereby creating a pressure difference between the liquids in the first chamber 105 and the second chamber 106; at the same time, the processing difficulty of the first capillary tube is not high, and the first capillary tube will not be too large, thus not requiring a corresponding increase in the overall volume of the throttle. In this embodiment, the value of D1 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, or 0.6mm.

[0034] In some embodiments, the inner diameter D2 of the second capillary tube satisfies the relationship: 0.2mm ≤ D2 ≤ 0.6mm. Similarly, when D2 is within this range, on the one hand, the inner diameter of the second capillary tube will not be too large, resulting in a large amount of oil entering the oil supply channel 102 through the second capillary tube, and the second capillary tube will not cause the overall volume of the throttle to be too large. On the other hand, the inner diameter of the second capillary tube will not be too small, resulting in excessively high processing costs for the second capillary tube, and avoiding the problem that the oil in the first chamber 105 cannot enter the oil supply channel 102 through the second capillary tube. In this embodiment, the value of D2 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, or 0.6mm.

[0035] In some embodiments, a protrusion 121 is provided on the side of the cover plate 12 near the base 11, and the protrusion 121 abuts against the diaphragm sheet 20 so that a second chamber 106 is formed between the cover plate 12, the diaphragm sheet 20 and the inner wall surface of the throttling groove 1111.

[0036] Specifically, when the cover plate 12 and the base 11 are connected, the protrusion 121 of the cover plate 12 abuts against the diaphragm sheet 20, thereby forming a first chamber 105 between the diaphragm sheet 20 and the throttling groove 1111. A certain space for storing liquid exists between the cover plate 12 and the diaphragm sheet 20, i.e., a second chamber 106 is formed between the cover plate 12, the diaphragm sheet 20, and the inner wall of the throttling groove 1111. In some embodiments, the protrusion 121 is located in the center of the cover plate 12, so that when the protrusion 121 acts on the diaphragm, it forms a pre-pressure on the central region of the diaphragm sheet 20, which can eliminate the assembly gap 107, accurately adjust the initial deformation state of the diaphragm sheet 20, and thus accurately set the initial gap 107 and the initial liquid resistance of the variable throttling.

[0037] In some embodiments, the cover plate 12 is provided with a positioning boss 122 adapted to the throttling groove 1111, and the positioning boss 122 protrudes into the groove. The protrusion 121 includes a protruding section 1211, which protrudes from the center of the positioning boss 122 and abuts against the diaphragm sheet 20 to form a second chamber 106 between the positioning boss 122, the diaphragm sheet 20 and the inner wall surface of the throttling groove 1111.

[0038] Specifically, during the assembly of the cover plate 12 and the base 11, the positioning boss 122 protrudes into the groove, thereby preventing incorrect assembly of the cover plate 12 and the base 11. Simultaneously, the interlocking fit enhances the connection strength between the cover plate 12 and the base 11, reducing the likelihood of warping or deformation of the cover plate 12 under high pressure, thus ensuring the stability of the throttle's performance under high-pressure conditions. Furthermore, after the cover plate 12 and the base 11 are assembled, the protruding section 1211 abuts against the diaphragm sheet 20, forming a second chamber 106 between the positioning boss 122, the diaphragm sheet 20, and the inner wall of the throttling groove 1111, facilitating the entry of oil from the oil inlet channel 101.

[0039] In some embodiments, an annular oil injection groove 1121 is provided on the second side 112, and an oil inlet channel 101 is provided at the bottom of the annular oil injection groove 1121.

[0040] Specifically, the oil enters the oil inlet channel 101 after passing through the annular oil filling groove 1121, thereby allowing the oil to enter the throttle. In this embodiment, the annular oil filling groove 1121 is provided on the second side 112 to improve the installation freedom of the throttle. That is, after the throttle is aligned with the oil supply port on the hydrostatic equipment, rotating the throttle can adjust the relative position of the throttle and other components on the hydrostatic equipment. As long as the oil supply port is connected to the annular oil filling groove 1121, interference between the throttle and other components on the hydrostatic equipment can be avoided.

[0041] In some embodiments, the base 11 has a machining hole that communicates with the oil inlet channel 101, and a plug 30 is detachably installed inside the machining hole. That is, when manufacturing the throttle, the first pressure drop channel 103 and the second pressure drop channel 104 can be created through the machining hole, thereby ensuring the integrity of the base 11 and improving its structural stability. When using the throttle, the machining hole is sealed by the plug 30, thus preventing oil in the oil inlet channel 101 from flowing out of the machining hole.

[0042] In some embodiments, a first sealing element 40 is provided on a first side 111 of the base 11, and a second sealing element 50 is provided on a second side 112 of the base 11. In this embodiment, both the first sealing element 40 and the second sealing element 50 are annular sealing rings. The first sealing element 40 seals between the base 11 and the cover plate 12, and the second sealing element 50 seals between the base 11 and a predetermined structure for mounting a throttle.

[0043] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0044] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0045] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A throttle, characterized in that, include: A base (11) has a first side (111) and a second side (112) arranged opposite to each other. A throttling groove (1111) is provided on the first side (111), and an oil supply channel (102) is provided in the throttling groove (1111). The oil supply channel (102) extends from the first side (111) to the second side (112). An oil inlet channel (101) is provided on the base (11), and the oil inlet channel (101) extends from the first side (111) to the second side (112). A thin film (20) is disposed in the throttling groove (1111), and the thin film (20) and the throttling groove (1111) surround to form a first chamber (105). A cover plate (12) is provided on the first side (111) and forms a second chamber (106) with the inner wall of the film sheet (20) and the throttling groove (1111). The oil inlet channel (101) is connected to the second chamber (106), and the inner wall of the throttling groove (1111) is provided with a first pressure drop channel (103), and the first pressure drop channel (103) is connected to the oil inlet channel (101) and the first chamber (105).

2. The throttle device according to claim 1, characterized in that, A second pressure drop channel (104) is connected between the first chamber (105) and the oil supply channel (102).

3. The throttle device according to claim 2, characterized in that, A throttling boss (1112) is provided in the center of the throttling groove (1111), and the oil supply channel (102) is provided on the throttling boss (1112). The diaphragm sheet (20) and the space inside the throttling groove (1111) located outside the throttling boss (1112) enclose the first chamber (105). The second pressure drop channel (104) is opened on the side wall of the throttling boss (1112).

4. The throttle device according to claim 3, characterized in that, An annular boss (1113) is provided in the throttling groove (1111). The annular boss (1113) is located on the outer periphery of the throttling boss (1112). The diaphragm sheet (20) overlaps the annular boss (1113). Wherein, along the depth direction of the throttling groove (1111), the protrusion height of the annular boss (1113) is higher than that of the throttling boss (1112), so that there is a gap (107) between the thin film (20) and the throttling boss (1112).

5. The throttle device according to claim 2, characterized in that, The first pressure drop channel (103) includes a first capillary tube, the ratio of the length L1 to the inner diameter D1 of the first capillary tube satisfies the relationship: L1 / D1 > 10; and / or, The second pressure drop channel (104) includes a second capillary tube, and the ratio of the length L2 and the inner diameter D2 of the second capillary tube satisfies the relationship: L2 / D2>10.

6. The throttle device according to claim 5, characterized in that, The inner diameter D1 of the first capillary tube satisfies the following relationship: 0.2mm ≤ D1 ≤ 0.6mm; and / or, The inner diameter D2 of the second capillary tube satisfies the following relationship: 0.2mm≤D2≤0.6mm.

7. The throttle device according to any one of claims 1 to 6, characterized in that, The cover plate (12) has a protrusion (121) on the side near the base (11), and the protrusion (121) abuts against the diaphragm (20) so that the second chamber (106) is formed between the inner wall surfaces of the cover plate (12), the diaphragm (20) and the throttling groove (1111).

8. The throttle device according to claim 7, characterized in that, The cover plate (12) is provided with a positioning boss (122) adapted to the throttling groove (1111), and the positioning boss (122) protrudes into the groove; The protrusion (121) includes a protruding section (1211) which protrudes from the center of the positioning boss (122) and abuts against the diaphragm (20) to form the second chamber (106) between the positioning boss (122), the diaphragm (20) and the inner wall of the throttling groove (1111).

9. The throttle device according to any one of claims 1 to 6, characterized in that, An annular oil injection groove (1121) is provided on the second side (112), and the oil inlet channel (101) is provided at the bottom of the annular oil injection groove (1121).

10. A static pressure device, characterized in that, The static pressure device includes the throttle device according to any one of claims 1 to 9.

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