Throttle and static pressure system having the same

Abstract

The present application discloses a throttle and a static pressure system having the same. The throttle includes a base and a rotating flow channel cover plate. A cylindrical table is provided on the base, and a first channel is provided axially through the cylindrical table; the rotating flow channel cover plate is rotatably mounted on the cylindrical table, and a second channel and a guide channel are provided on the rotating flow channel cover plate, and the guide channel has an inlet end and an outlet end, and the inlet end is connected to the second channel; at least one annular throttling channel is provided on the side of the cylindrical table close to the rotating flow channel cover plate and / or on the side of the rotating flow channel cover plate close to the cylindrical table, and the annular throttling channel is provided around the outer periphery of the first channel, and the guide channel is connected to the outlet end, and an oil outlet connected to the annular throttling channel is provided on the cylindrical table. The throttle can realize liquid resistance adjustment. When the throttle is used in a static pressure system, the static pressure system has different load-bearing capacity ranges and can adapt to the load range of different actual working conditions.

Description

Technical Field

[0001] The present application relates to the field of liquid static pressure technology, and in particular to a throttle and a static pressure system having the same. Background Art

[0002] Liquid hydrostatic technology is a sliding bearing technology that uses liquid static pressure to support loads. Compared with traditional rolling bearings, liquid hydrostatic bearings have the advantages of high transmission efficiency, low structural precision requirements, and long service life. Therefore, they are widely used in precision machinery and equipment.

[0003] The throttle automatically distributes pressure in a static pressure system based on changes in the load on the support end. The throttle acts as the control and regulation part of the static pressure system and is the most core component in the system.

[0004] Currently, common throttling methods with fixed fluid resistance characteristics include small hole throttling, capillary throttling, and gap throttling. These throttling methods are generally integrated into the support end without a separate throttling device. Therefore, they cannot be adjusted once manufactured, increasing the risk of product support end failure due to throttling device design and manufacturing errors. Furthermore, the throttling and support characteristics are fixed upon manufacturing completion and cannot be adjusted, severely restricting the application range of the equipment. Furthermore, each throttling method is individually designed and calculated based on actual pressure distribution requirements. For closed support structures, matching throttling device design is required, significantly increasing the design difficulty and hindering product promotion and application. Summary of the Invention

[0005] The main purpose of the present application is to provide a throttle and a static pressure system having the same, wherein the throttle can realize liquid resistance adjustment. When the throttle is used in the static pressure system, the static pressure system has different load-bearing capacity ranges and can adapt to the load range of different actual working conditions.

[0006] According to one aspect of an embodiment of the present application, a throttle is provided, comprising:

[0007] A base, wherein a cylindrical platform is provided on the base, and a first channel is provided axially through the cylindrical platform;

[0008] a rotating flow channel cover plate, the rotating flow channel cover plate being rotatably mounted on the cylindrical platform, the rotating flow channel cover plate being provided with a second channel and a guide channel, the second channel extending along the thickness direction of the rotating flow channel cover plate and being connected to the first channel, the guide channel extending along the radial direction of the rotating flow channel cover plate, and the guide channel having an inlet end and an outlet end, the inlet end being connected to the second channel;

[0009] Among them, at least one annular throttling channel is provided on the side of the cylindrical platform close to the rotating flow channel cover plate and / or on the side of the rotating flow channel cover plate close to the cylindrical platform, the annular throttling channel is arranged around the outer periphery of the first channel, the guide channel is connected to the outlet end, and an oil outlet connected to the annular throttling channel is provided on the cylindrical platform.

[0010] Furthermore, the annular throttling channel includes a first annular throttling channel and a second annular throttling channel, and the first annular throttling channel and the second annular throttling channel are spaced apart in a direction away from the first channel;

[0011] The oil outlet includes a first oil outlet and a second oil outlet, the first oil outlet is communicated with the first annular throttling channel, and the second oil outlet is communicated with the second annular throttling channel;

[0012] The guide channel includes a first guide channel and a second guide channel, the first guide channel and the second guide channel extend in directions away from each other, the outlet end of the first guide channel is connected to the first annular throttling channel, and the outlet end of the second guide channel is connected to the second annular throttling channel.

[0013] Furthermore, a first sealing ring is provided between the outlet of the first channel and the first annular throttling channel, a second sealing ring is provided between the second annular throttling channel and the second annular throttling channel, and a third sealing ring is provided on the outer periphery of the second annular throttling channel.

[0014] Furthermore, the guide channel extends from the second channel to the outer edge of the rotating flow channel cover plate, and the port of the guide channel located at the outer edge of the rotating flow channel cover plate is sealed by a top screw.

[0015] Furthermore, the throttle further comprises:

[0016] An identification cover plate is provided on the rotating flow channel cover plate and is connected to the cylindrical platform. The identification cover plate is provided with a scale for measuring the rotation angle of the rotating flow channel cover plate.

[0017] Furthermore, the rotating flow channel cover plate is arranged in a cylindrical structure, the upper surface of the identification cover plate is provided with a circular hole, the axis of the circular hole is consistent with the axis of the rotating flow channel cover plate, and the scale is arranged along the circumferential direction of the circular hole.

[0018] Furthermore, a rotating portion is provided at the top end of the rotating flow channel cover plate facing the center of the circular hole, and the rotating portion drives the rotating flow channel cover plate to rotate on the cylindrical platform under the action of an external force.

[0019] Furthermore, an annular sink is provided on the outer periphery of the rotating flow channel cover plate, an elastic pad is sleeved on the annular sink, and the marking cover plate is pressed on the elastic pad and connected to the cylindrical platform through threads.

[0020] Furthermore, the cylindrical platform, the base and the rotary flow channel cover are all provided with calibration parts.

[0021] On the other hand, the present application also provides a static pressure system, which includes the above-mentioned throttle.

[0022] Compared with the existing technology, the technical solution of this application has at least the following technical effects:

[0023] Since the throttle in the present application is provided with a rotating flow channel cover plate, which is rotatably mounted on a cylindrical platform, when the throttling effect of the throttle needs to be adjusted, it is only necessary to rotate the rotating flow channel cover plate. After the rotation, the connection position between the outlet end of the guide channel and the annular throttling channel will change. After the oil enters the annular throttling channel, it can flow along the annular throttling channel in two different directions, and then the liquid resistance of the oil flowing out of the oil outlet can be adjusted, so that the throttle in the present application has different throttling effects and can be applied in occasions with different usage requirements, which is more conducive to the promotion and reference of the throttle. When the throttle is used in a static pressure system, the static pressure system has different load-bearing capacity ranges and can adapt to the load ranges of different actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0025] Figure 1 A three-dimensional structural diagram of a throttle disclosed in an embodiment of the present application;

[0026] Figure 2 This is an exploded view of the throttle disclosed in the embodiment of the present application;

[0027] Figure 3 A three-dimensional structural diagram of the base disclosed in an embodiment of the present application;

[0028] Figure 4 A three-dimensional structural diagram of the rotary flow channel cover plate (flipped to the back) disclosed in an embodiment of the present application;

[0029] Figure 5 A top view of the rotary flow channel cover plate disclosed in an embodiment of the present application;

[0030] Figure 6 For the Figure 5A view of the rotary flow channel cover plate after being cut open at AA in FIG.

[0031] Figure 7 A bottom view of the rotary flow channel cover plate disclosed in an embodiment of the present application;

[0032] Figure 8 This is an exploded view of the guide rail and throttle disclosed in an embodiment of the present application;

[0033] Figure 9 This is a front view of the guide rail disclosed in an embodiment of the present application;

[0034] Figure 10 A bottom view of the guide rail disclosed in an embodiment of the present application;

[0035] Figure 11 A connection diagram of the static pressure system disclosed in the embodiment of this application;

[0036] Figure 12 A front view of a slider and a guide rail in a static pressure system disclosed in an embodiment of the present application;

[0037] Figure 13 This is a performance curve diagram of the throttle in the static pressure system disclosed in the embodiment of the present application at different rotation angles.

[0038] The above drawings include the following reference numerals:

[0039] 10. Base; 11. Cylindrical platform; 12. First channel; 13. Oil outlet; 13a. First oil outlet; 13b. Second oil outlet; 20. Rotating flow channel cover; 21. Second channel; 22. Guide channel; 22a. First guide channel; 22b. Second guide channel; 221. Inlet; 222. Outlet; 23. Annular throttling channel; 23a. First annular throttling channel; 23b. Second annular throttling channel; 24. Rotating portion ;25. Annular sink;30. First sealing ring;40. Second sealing ring;50. Third sealing ring;60. Top screw;70. Marking cover;71. Scale;72. Circular hole;80. Elastic pad;90. Fourth sealing ring;100. Slider;110. Bolt;120. Bed;130. Oil tank;140. Oil pump;150. Overflow valve;160. Motor;170. Oil filter;180. Calibration unit;190. Guide rail. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0043] See also Figures 1 to 4 As shown, according to an embodiment of the present application, a throttle is provided, which includes a base 10 and a rotating flow channel cover plate 20.

[0044] Specifically, a cylindrical platform 11 is provided on the base 10, and a first channel 12 is provided axially through the cylindrical platform 11; a rotating flow channel cover plate 20 is rotatably mounted on the cylindrical platform 11, and a second channel 21 and a guide channel 22 are provided on the rotating flow channel cover plate 20. The second channel 21 extends along the thickness direction of the rotating flow channel cover plate 20 and is connected to the first channel 12. The guide channel 22 extends along the radial direction of the rotating flow channel cover plate 20 and has an inlet end 221 and an outlet end 222. The inlet end 221 is connected to the second channel 21. Among them, at least one annular throttling channel 23 is provided on the side of the cylindrical platform 11 close to the rotating flow channel cover plate 20 and / or on the side of the rotating flow channel cover plate 20 close to the cylindrical platform 11. That is to say, the annular throttling channel 23 can be set on the side of the cylindrical table 11 close to the rotating flow channel cover plate 20, or it can be set on the side of the cylindrical table 11 close to the rotating flow channel cover plate 20, or it can be set at the same time on the side of the cylindrical table 11 close to the rotating flow channel cover plate 20 and the side of the rotating flow channel cover plate 20 close to the cylindrical table 11. The annular throttling channel 23 is arranged around the outer periphery of the first channel 12, the guide channel 22 is connected to the outlet end 222, and an oil outlet 13 connected to the annular throttling channel 23 is provided on the cylindrical table 11.

[0045] In actual use, the inlet end of the first channel 12 is connected to the oil tank, and the oil outlet 13 is connected to the oil cavity of the slide rail or the like to be controlled. After the oil enters the first channel 12, it can pass through the second channel 21 into the guide channel 22, then into the annular throttling channel 23, and finally flow into the oil cavity of the slider or other structure from the oil outlet 13. During this process, after the oil enters the annular throttling channel 23 from the guide channel 22, it is throttled by the annular throttling channel 23 and can then enter the oil cavity of the slider or other structure from the oil outlet 13.

[0046] Since the throttle in this embodiment is provided with a rotating flow channel cover plate 20, the rotating flow channel cover plate 20 is rotatably mounted on the cylindrical platform 11. When the throttle effect of the throttle needs to be adjusted, it is only necessary to rotate the rotating flow channel cover plate 20. After the rotation, the connection position between the outlet end 222 of the guide channel 22 and the annular throttling channel 23 will change. After the oil enters the annular throttling channel 23, it can flow in two different directions along the annular throttling channel 23, and then the liquid resistance of the oil flowing out of the oil outlet 13 can be adjusted, so that the throttle in this embodiment has different throttling effects and can be applied in occasions with different usage requirements, which is more conducive to the promotion and reference of the throttle. When the throttle is used in a static pressure system, the static pressure system has different load-bearing capacity ranges and can adapt to the load ranges of different actual working conditions.

[0047] The annular throttling channel 23 in the present application can be set as one, or as two or more. The drawings of the present application show the case where the annular throttling channel 23 is set as two. Specifically, the annular throttling channel 23 includes a first annular throttling channel 23a and a second annular throttling channel 23b, and the first annular throttling channel 23a and the second annular throttling channel 23b are spaced apart in a direction away from the first channel 12; correspondingly, the oil outlet 13 includes a first oil outlet 13a and a second oil outlet 13b, the first oil outlet 13a is connected to the first annular throttling channel 23a, and the second oil outlet 13b is connected to the second annular throttling channel 23b; the guide channel 22 includes a first guide channel 22a and a second guide channel 22b, and the first guide channel 22a and the second guide channel 22b extend in directions away from each other, the outlet end 222 of the first guide channel 22a is connected to the first annular throttling channel 23a, and the outlet end 222 of the second guide channel 22b is connected to the second annular throttling channel 23b.

[0048] By providing the first annular throttling channel 23a and the second annular throttling channel 23b, and correspondingly providing the first oil outlet 13a and the second oil outlet 13b, when the first oil outlet 13a and the second oil outlet 13b are connected to two oil chambers, throttling can be performed on different oil chambers, resulting in a simple structure and ease of use. The specific number of annular throttling channels 23, flow guide channels 22, and oil outlets 13 is selected and designed based on actual usage requirements and is not specifically limited in this application.

[0049] Optionally, the annular throttling channel 23 in the present application can be a circular annular throttling channel, or a square annular throttling channel, an elliptical annular throttling channel, etc. The drawings of this embodiment show the situation when the annular throttling channel 23 is a circular annular throttling channel.

[0050] To facilitate sealing of the first annular throttling channel 23a and the second annular throttling channel 23b, a first sealing ring 30 is provided between the outlet of the first channel 12 and the first annular throttling channel 23a, a second sealing ring 40 is provided between the second annular throttling channel 23b, and a third sealing ring 50 is provided on the outer periphery of the second annular throttling channel 23b. Through the action of the first sealing ring 30, the second sealing ring 40, and the third sealing ring 50, the first annular throttling channel 23a and the second annular throttling channel 23b can be effectively sealed.

[0051] Furthermore, a fourth sealing ring 90 is provided at the inlet end of the first channel 12 , and through the action of the fourth sealing ring 90 , the inlet end of the first channel 12 can be sealed and connected to the pipeline communicating with the oil tank.

[0052] Furthermore, the guide channel 22 in the present application extends from the second channel 21 to the outer edge of the rotary flow channel cover plate 20, and the port of the guide channel 22 located at the outer edge of the rotary flow channel cover plate 20 is sealed by a top screw 60. In the present application, by extending the guide channel 22 from the second channel 21 to the outer edge of the rotary flow channel cover plate 20, it is more convenient for processing and production. After the processing is completed, the port of the guide channel 22 located at the outer edge of the rotary flow channel cover plate 20 is sealed by the action of the top screw 60, so that the oil can enter the annular throttling channel 23 from the outlet end 222 of the guide channel 22. Of course, in other embodiments of the present application, other sealing plugs can also be used to seal the port of the guide channel 22 located at the outer edge of the rotary flow channel cover plate 20. As long as it is other deformation methods based on the conception of the present application, it is within the scope of protection of the present application.

[0053] Combine Figures 1 to 7As shown, the throttle in this embodiment also includes an identification cover plate 70, which is placed on the rotating flow channel cover plate 20 and connected to the cylindrical platform 11. The identification cover plate 70 is provided with a scale 71 for measuring the rotation angle of the rotating flow channel cover plate 20. When the throttling effect of the throttle needs to be adjusted, it is only necessary to rotate the rotating flow channel cover plate 20 by a predetermined angle according to the design requirements. During the rotation process, the user can measure the rotation angle of the rotating flow channel cover plate 20 according to the scale 71 provided on the identification cover plate 70. The structure is simple and easy to operate.

[0054] Furthermore, the rotating flow channel cover plate 20 is configured as a cylindrical structure, and a circular hole 72 is provided on the upper surface of the identification cover plate 70. The axis of the circular hole 72 is aligned with the axis of the rotating flow channel cover plate 20, and a scale 71 is provided along the circumference of the circular hole 72. In this configuration, when the rotating flow channel cover plate 20 is rotated, the scale 71 provided on the circumference of the circular hole 72 can accurately measure the rotation angle of the rotating flow channel cover plate 20.

[0055] Specifically, the outer periphery of the cylindrical table 11 in this embodiment is provided with a thread (not shown in the figure), and correspondingly, the identification cover plate 70 is provided with a thread that cooperates with the thread on the cylindrical table 11. The identification cover plate 70 is connected to the cylindrical table 11 through a thread. When the identification cover plate 70 is tightened on the cylindrical table 11, the rotating flow channel cover plate 20 can be locked on the base 10. The structure is simple and easy to connect.

[0056] Furthermore, an annular recessed platform 25 is provided on the outer periphery of the rotating flow channel cover plate 20. An elastic pad 80 is sleeved on the annular recessed platform 25. The marking cover plate 70 is pressed onto the elastic pad 80 and is threadedly connected to the cylindrical platform 11. Alternatively, the elastic pad 80 may be a rubber pad, etc., which serves to tighten the connection between the rotating flow channel cover plate and the cylindrical platform 11 and ensure a sealing effect for the annular throttling channel 23.

[0057] Furthermore, the cylindrical table 11, the rotating flow channel cover plate 20 and the identification cover plate 70 in this embodiment are all provided with a calibration portion 180. During actual assembly, the calibration portions 180 on the cylindrical table 11, the rotating flow channel cover plate 20 and the identification cover plate 70 are aligned, so that the three can be maintained in the initial design position. When the throttling effect of the throttle needs to be adjusted, it is only necessary to rotate the rotating flow channel cover plate 20.

[0058] The top of the rotating flow channel cover plate 20 in this embodiment is provided with a rotating portion 24 at the center position of the circular hole 72, and the rotating portion 24 is driven by an external force to drive the rotating flow channel cover plate 20 to rotate on the cylindrical table 11. Optionally, the rotating portion 24 is a cross-shaped groove provided at the top of the rotating flow channel cover plate 20. When it is necessary to rotate the rotating flow channel cover plate 20, a screwdriver or other structure is inserted into the cross-shaped groove, and then the rotating flow channel cover plate 20 is driven to rotate a certain angle. The structure is simple and easy to operate. Of course, in other embodiments of the present application, the rotating portion 24 can also be set to a rotating protrusion, a rotating operating knob or other structures. As long as it is other deformation methods under the conception of the present application, they are all within the scope of protection of the present application.

[0059] See also Figures 8 to 12 As shown, the embodiment of the present application also provides a static pressure system, which includes an oil tank 130, an oil pump 140, an electric motor 160, an oil filter 170, a relief valve 150, a throttle, a slider 100, and a bed 120. The slider 100 is provided with an oil chamber. During actual installation, the base 10 of the throttle can be connected to the slider 100 by bolts 110, etc., and the slider 100 is mounted on a guide rail 190. When the electric motor 160 is working, it can drive the oil pump 140 to work, and then the oil in the oil tank 130 can be pumped to the two oil filters 170 in sequence. After being filtered by the oil filters 170, the oil can enter the throttle and then enter the oil chamber of the slider 100. The inlet end of the relief valve 150 in this embodiment is connected between the oil filter 170 and the pump body 140 to facilitate protection of the static pressure system.

[0060] See also Figures 1 to 12 As shown in the figure, the performance of the throttle is analyzed by taking the performance of a certain system state of the static pressure system as an example:

[0061] When the oil supply pressure of the oil tank 130 is: Ps = 5 MPa; the oil viscosity coefficient is: μ = 46 mm 2 / s; the outer diameter of the second annular throttling flow 23b of the throttle is r1=16.25mm, the inner diameter is r2=12.25mm, and the height is H1=0.1mm; the outer diameter of the first annular throttling channel 23a is r3=10mm, the inner diameter is r4=6mm, and the height is H2=0.1mm; the rotation angle of the guide channel 22 relative to the initial position is θ; the long side length L of the slider 190 on the slider 100 is 130mm, and the long side sealing length m=15mm; the short side length B of the slider 100 is 75mm, and the short side sealing length n of the slider 100 is 15mm; the reserved gap HP of the guide rail 190 is 0.05mm; the support gap h of the lower cavity of the guide rail 190 is 0~0.05mm.

[0062] Based on the above static pressure system parameters, the static pressure system performance is analyzed in combination with the following formula:

[0063] The flow path length of the second annular throttling channel 23b flowing in the first direction is

[0064] The flow path length of the second annular throttling channel 23b flowing in the second direction is

[0065] The flow channel width of the second annular throttling channel 23b is: b=r1-r2;

[0066] Height of the second annular throttling channel 23b: H1;

[0067] The flow resistance of the oil in the second annular throttling channel 23b flowing in the first direction and the second direction is:

[0068]

[0069] At this time, the overall fluid resistance of the second annular throttling channel 23b (the fluid resistance of the oil flowing out of the first oil outlet 13a) is:

[0070]

[0071] The effective bearing area of ​​the oil chamber on the slider 100 is: Ae = (Lm) × (Bn);

[0072] The oil chamber flow coefficient on the slider 100 is:

[0073] Liquid resistance of the oil chamber on the slider 100:

[0074] Oil chamber pressure on slider 100:

[0075] The bearing capacity of the oil chamber on the slider 100: F = P r ·Ae;

[0076] The load-bearing capacity of the guide rail 190 is: F=F1-F2.

[0077] Combining the above calculation formula, we can know that: taking the angle θ of the rotating flow channel cover 20 as the independent variable, the static pressure system performance analysis results are as follows: Figure 13 As shown in the figure, assuming that the working range of the bearing clearance h of the oil chamber of the static pressure system is 0.015mm-0.035mm, it can be seen that the range of the static pressure system load capacity F is different for different angles θ. Therefore, it can be combined with the actual working conditions and Figure 13 The rotation angle θ of the rotating flow channel cover plate 20 is adjusted to ensure that it meets actual engineering needs.

[0078] According to the above embodiments, it can be known that the throttle of the present invention can change the relative positions of the hydraulic oil inlet and outlet by rotating the rotating flow channel cover 20, thereby changing the flow channel length of the annular throttling channel and the size of the throttling liquid resistance, so that the static pressure system has different load-bearing capacity ranges to adapt to the load range of actual working conditions, and has the advantages of compact and simple structure, convenient design and adjustment, low processing and manufacturing requirements, and strong structural independence and interchangeability. At the same time, the throttle can solve the problem that the integrated design is prone to increase the risk of support end scrapping due to throttle design and manufacturing errors, and solve the problem that the throttling characteristics and support characteristics of capillary and small hole throttles cannot be adjusted and modified once they are designed and manufactured. The throttle can also solve the problem that the closed support structure requires a matching design of the throttle, which brings about cumbersome and difficult design.

[0079] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0080] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0081] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A throttle, characterized in that: include: A base (10), wherein a cylindrical platform (11) is provided on the base (10), and a first channel (12) is provided axially through the cylindrical platform (11); A rotating flow channel cover plate (20), the rotating flow channel cover plate (20) being rotatably mounted on the cylindrical platform (11), the rotating flow channel cover plate (20) being provided with a second channel (21) and a guide channel (22), the second channel (21) extending along the thickness direction of the rotating flow channel cover plate (20) and being in communication with the first channel (12), the guide channel (22) extending along the radial direction of the rotating flow channel cover plate (20), and the guide channel (22) having an inlet end (221) and an outlet end (222), the inlet end (221) being in communication with the second channel (21); Wherein, at least one annular throttling channel (23) is provided on one side of the cylindrical platform (11) close to the rotating flow channel cover plate (20) and / or on one side of the rotating flow channel cover plate (20) close to the cylindrical platform (11), the annular throttling channel (23) is provided around the outer periphery of the first channel (12), the guide channel (22) is connected to the outlet end (222), and an oil outlet (13) connected to the annular throttling channel (23) is provided on the cylindrical platform (11).

2. The throttle according to claim 1, characterized in that The annular throttling channel (23) comprises a first annular throttling channel (23a) and a second annular throttling channel (23b), wherein the first annular throttling channel (23a) and the second annular throttling channel (23b) are arranged at intervals in a direction away from the first channel (12); The oil outlet (13) comprises a first oil outlet (13a) and a second oil outlet (13b), wherein the first oil outlet (13a) is communicated with the first annular throttling channel (23a), and the second oil outlet (13b) is communicated with the second annular throttling channel (23b); The guide channel (22) comprises a first guide channel (22a) and a second guide channel (22b), wherein the first guide channel (22a) and the second guide channel (22b) extend in directions diverging from each other, the outlet end (222) of the first guide channel (22a) is in communication with the first annular throttling channel (23a), and the outlet end (222) of the second guide channel (22b) is in communication with the second annular throttling channel (23b).

3. The throttle according to claim 2, characterized in that A first sealing ring (30) is provided between the outlet of the first channel (12) and the first annular throttling channel (23a), a second sealing ring (40) is provided between the second annular throttling channel (23b), and a third sealing ring (50) is provided on the outer periphery of the second annular throttling channel (23b).

4. The throttle according to claim 1, characterized in that The guide channel (22) extends from the second channel (21) to the outer edge of the rotating flow channel cover plate (20), and the port of the guide channel (22) located at the outer edge of the rotating flow channel cover plate (20) is sealed by a top screw (60).

5. The throttle according to claim 1, characterized in that The throttle further comprises: An identification cover plate (70) is provided on the rotating flow channel cover plate (20) and is connected to the cylindrical platform (11). The identification cover plate (70) is provided with a scale (71) for measuring the rotation angle of the rotating flow channel cover plate (20).

6. The throttle according to claim 5, characterized in that The rotating flow channel cover plate (20) is provided in a cylindrical structure, the upper surface of the identification cover plate (70) is provided with a circular hole (72), the axis of the circular hole (72) is consistent with the axis of the rotating flow channel cover plate (20), and the scale (71) is provided along the circumferential direction of the circular hole (72).

7. The throttle according to claim 6, characterized in that A rotating portion (24) is provided at the top end of the rotating flow channel cover plate (20) facing the center of the circular hole (72), and the rotating portion (24) drives the rotating flow channel cover plate (20) to rotate on the cylindrical platform (11) under the action of an external force.

8. The throttle according to claim 5, characterized in that An annular sink (25) is provided on the outer periphery of the rotating flow channel cover plate (20), an elastic pad (80) is sleeved on the annular sink (25), and the identification cover plate (70) is pressed onto the elastic pad (80) and connected to the cylindrical platform (11) via threads.

9. The throttle according to any one of claims 5 to 8, characterized in that The cylindrical platform (11), the base (10) and the rotary flow channel cover plate (20) are all provided with a calibration portion (180).

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

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