throttle device

Abstract

The application discloses a throttling device, which comprises a shell assembly and an adjusting assembly. A plurality of oil cavities and a plurality of flow channels are arranged in the shell assembly. An oil inlet channel and an oil outlet channel are connected through a first flow channel and connected to a pressure stabilizing cavity through a second flow channel. The pressure stabilizing cavity is communicated with an oil supplement cavity through a plurality of installation cavities, and the oil supplement cavity is connected to the oil outlet channel. An adjusting cavity is arranged outside the installation cavities and connected to the oil inlet channel through a third flow channel. An adjusting assembly composed of an elastic element and a plunger is arranged in each installation cavity, and the plunger divides the installation cavity into a first cavity and a second cavity. The first cavity is communicated with the pressure stabilizing cavity, and the second cavity is connected to the adjusting cavity and the oil supplement cavity. The plunger can slide in the cavity to change the flow area between the adjusting cavity and the second cavity, and the elastic element is stretched and contracted between the plunger and the inner wall of the cavity to assist the movement of the plunger. The throttling device can at least solve the problem that the throttling device has a small adjusting range in the case of heavy equipment, large oil pressure and large adjusting range.

Description

Technical Field

[0001] This invention relates to the field of liquid static pressure throttling device technology, and more specifically, to a throttling device. Background Technology

[0002] Throttling devices are key components in fluid mechanics used to control fluid flow and pressure, and are widely used in various industries such as petroleum, chemical, power, and refrigeration and air conditioning. They regulate the fluid's velocity or direction by changing the flow cross-section (i.e., changing the size of the regulating orifice), thereby controlling the fluid flow rate. Common throttling devices include valves, orifice plates, and nozzles.

[0003] However, existing throttling devices have some shortcomings, especially in heavy equipment applications requiring high oil pressure and a wide adjustment range. Traditional throttling device designs typically use a combination of a single adjustment orifice and a single adjustment element as the core component. This design is difficult to meet the requirements of applications requiring high oil supply pressure and a wide adjustment range, often resulting in a relatively small adjustment range. Therefore, such throttling devices are not suitable for hydraulic systems that require a large adjustment range. Summary of the Invention

[0004] The main objective of this invention is to provide a throttling device that at least solves the problem of small adjustment range of throttling devices in heavy equipment with large oil pressure and large adjustment range.

[0005] According to one aspect of the present invention, a throttling device is provided, comprising:

[0006] The housing assembly includes a pressure stabilizing chamber, an oil replenishing chamber, an adjusting chamber, an oil inlet channel, an oil outlet channel, a first flow channel, a second flow channel, and a third flow channel. The oil inlet channel and the oil outlet channel are connected through the first flow channel, and the oil inlet channel and the pressure stabilizing chamber are connected through the second flow channel. The pressure stabilizing chamber and the oil replenishing chamber are connected through multiple mounting chambers. The oil replenishing chamber is connected to the oil outlet channel. The adjusting chamber surrounds the outer periphery of the mounting chamber, and the adjusting chamber is connected to the oil inlet channel through the third flow channel.

[0007] An adjustment assembly, comprising multiple adjustment assemblies, is provided one-to-one in multiple mounting chambers. Each adjustment assembly includes an elastic element and a plunger. The plunger divides the mounting chamber into a first cavity and a second cavity. The first cavity communicates with the pressure stabilizing cavity, and the second cavity communicates with the adjustment cavity and the oil replenishment cavity. The plunger can reciprocate along the extension direction of the mounting chamber to adjust the flow area between the adjustment cavity and the second cavity. The elastic element extends and retracts along the extension direction of the mounting chamber and abuts against the plunger and the inner wall of the mounting chamber.

[0008] Furthermore, the housing assembly includes a first housing, a second housing, a third housing, and a fourth housing;

[0009] The first housing, the second housing, the third housing, and the fourth housing are sequentially fixedly connected along a first direction. The first housing has a first groove on the side near the second housing so that the first housing and the second housing surround the oil replenishment cavity. The fourth housing has a second groove on the side near the third housing so that the fourth housing and the third housing surround the voltage stabilizing cavity. The second housing has a plurality of first through holes extending in a direction away from the third housing and penetrating the second housing. The third housing has a plurality of second through holes extending in a direction away from the second housing and penetrating the third housing. Each first through hole and each second through hole are arranged in a one-to-one correspondence so that the second housing and the third housing surround the plurality of mounting chambers. The oil replenishment cavity and the voltage stabilizing cavity are connected through the plurality of mounting chambers.

[0010] The third housing has a third groove on the side near the second housing, and the third groove surrounds the outer periphery of each of the second through holes so that the second housing and the third housing surround and form the adjustment cavity.

[0011] Furthermore, the first housing is provided with a first oil inlet section and a first oil outlet section extending along the first direction and penetrating the first housing, and the first oil outlet section is connected to the oil replenishment chamber. The second housing is provided with a second oil inlet section and a second oil outlet section extending along the first direction and penetrating the second housing. The first oil inlet section and the second oil inlet section are connected to form the oil inlet channel, and the first oil outlet section and the second oil outlet section are connected to form the oil outlet channel. The third housing includes an annular groove located at one end of the third housing near the second housing, and the annular groove is arranged around the outer periphery of the regulating cavity to form the first flow channel. The oil inlet channel and the oil outlet channel are connected through the first flow channel.

[0012] The third housing is provided with a through hole, which extends along a first direction and penetrates the third housing to form the second flow channel. The oil inlet channel and the pressure stabilizing chamber are connected through the second flow channel.

[0013] The third housing is provided with a flow guide groove, which is located at one end of the third housing near the second housing to form the third flow channel. One end of the flow guide groove is connected to the oil inlet channel, and the other end of the flow guide groove is connected to the regulating cavity.

[0014] Furthermore, each of the second through holes is provided with a throttling step at one end near the second housing, and there is a clearance notch between the throttling step and the second housing. The adjustment cavity communicates with each of the mounting chambers through the clearance notch.

[0015] Furthermore, each of the aforementioned elastic elements includes a first elastic element and a second elastic element;

[0016] Each of the plungers is movably disposed in each of the mounting chambers and is at least partially located in the clearance notch. One of the first elastic member and the second elastic member is located in the first cavity and abuts against the plunger and the inner wall of the first cavity. The other of the first elastic member and the second elastic member is located in the second cavity and abuts against the plunger and the inner wall of the second cavity. The plunger can reciprocate between the throttling step and the second housing to adjust the flow area of ​​the regulating cavity and the second cavity.

[0017] Furthermore, each of the plungers also includes an annular outer flange, which surrounds the outer periphery of the plunger and protrudes in the radial direction of the plunger, and the annular outer flange is located in the clearance notch to limit the range of movement of the plunger.

[0018] Furthermore, each of the plungers also includes a convex arc portion, which is located at one end of the plunger near the second cavity, and the center of the convex arc portion is located on the side of the plunger near the first cavity. The convex arc portion is at least used to adjust the flow area between the adjustment cavity and the second cavity when the plunger slides back and forth along the first direction.

[0019] Furthermore, the radius of the first through hole and the radius of the second through hole are equal, and the outer diameter of the annular outer flange is greater than the radii of the first through hole and the second through hole.

[0020] Furthermore, the radius of each of the first through holes near the end of the first housing is smaller than the radius of each of the first through holes away from the end of the first housing.

[0021] Furthermore, the throttling device also includes a first sealing ring, a second sealing ring, and a third sealing ring;

[0022] The first sealing ring is disposed between the first housing and the second housing and extends along the outer periphery of the first housing; the second sealing ring is located between the second housing and the third housing and extends along the outer periphery of the second housing; and the third sealing ring is located between the third housing and the fourth housing and extends along the outer periphery of the third housing.

[0023] In this invention, the throttling device has multiple mounting chambers inside, and each mounting chamber is equipped with a plunger that can slide back and forth along the extension direction of the mounting chamber to adjust the flow area between the adjusting chamber and the second cavity. By using multiple adjusting components instead of the previous adjustment method using a single adjusting component, the throttling device of this application can solve the problem of small adjustment range of throttling devices in heavy equipment with large oil pressure and large adjustment range. In actual operation, the hydraulic oil enters the housing assembly from the oil inlet channel and is divided into three oil circuits. Among them, the first oil circuit is where a portion of the hydraulic oil flows from the first flow channel into the oil outlet channel after entering the housing assembly from the oil inlet channel. Due to the certain viscosity of the hydraulic oil, a pressure drop will occur when the hydraulic oil passes through the first flow channel due to the damping effect of the first flow channel (that is, the pressure of the hydraulic oil flowing out of the first flow channel will be lower than the pressure of the hydraulic oil flowing into the first flow channel), and then it will flow directly out from the oil outlet channel to the outside of the housing assembly to support the load. The second oil circuit involves hydraulic oil entering the housing assembly through the inlet channel, then flowing into the pressure stabilizing chamber through the second flow channel. Since the first cavity is connected to the pressure stabilizing chamber, the hydraulic oil in the pressure stabilizing chamber will enter each of the first cavities. The third oil circuit involves hydraulic oil entering the housing assembly through the inlet channel, then flowing into the regulating chamber through the third flow channel, then into each of the second cavities, subsequently into the replenishing chamber, and finally flowing out through the outlet channel to the outside of the housing assembly to support the load.

[0024] It should be noted that when the load pressure on the throttling device is zero, the plunger slides towards the replenishing chamber under the pressure of the hydraulic oil in the first cavity, thus completely sealing the opening at the connection between the regulating chamber and the second cavity. At this time, the flow area between the regulating chamber and the second cavity (i.e., the actual interface area through which hydraulic oil can flow between the regulating chamber and the second cavity) is zero, and the hydraulic oil in the regulating chamber cannot flow into the second cavity. The throttling device continuously supplies hydraulic oil to the hydraulic slider and other devices through the first oil circuit to support the subsequent load. When the load pressure on the throttling device is not zero, as the load pressure increases, the load pressure is transmitted to the hydraulic oil in the replenishing chamber through the hydraulic oil in the oil outlet channel, then to the hydraulic oil in the second cavity, and finally acts on the plunger. The plunger slides towards the stabilizing chamber under the pressure of the load, thus opening the opening at the connection between the regulating chamber and the second cavity. During this process, the opening at the connection between the regulating chamber and the second cavity increases with the increase of the load pressure and decreases with the decrease of the load pressure, thereby achieving the purpose of automatically adjusting the flow area of ​​the regulating chamber and the second cavity according to the load size. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 This is an exploded view of the throttling device disclosed in an embodiment of the present invention from a first-view perspective.

[0027] Figure 2 This is a cross-sectional view of the throttling device disclosed in an embodiment of the present invention from a second perspective;

[0028] Figure 3 This is a cross-sectional view of the throttling device disclosed in an embodiment of the present invention when it is in a second perspective and the plunger is far away from the second housing;

[0029] Figure 4 This is a cross-sectional view of the throttling device disclosed in an embodiment of the present invention when it is in a second perspective and the plunger is close to the second housing;

[0030] Figure 5 for Figure 3 Enlarged view of section A;

[0031] Figure 6 This is a structural diagram of the first housing disclosed in an embodiment of the present invention;

[0032] Figure 7 This is a structural diagram of the second housing disclosed in an embodiment of the present invention;

[0033] Figure 8 This is a cross-sectional view of the second housing disclosed in an embodiment of the present invention from a second perspective.

[0034] Figure 9 This is a structural diagram of the third housing disclosed in an embodiment of the present invention;

[0035] Figure 10 This is a cross-sectional view of the third housing disclosed in an embodiment of the present invention from a second perspective;

[0036] Figure 11 This is a structural diagram of the fourth housing disclosed in an embodiment of the present invention;

[0037] Figure 12 This is a structural diagram of the plunger disclosed in an embodiment of the present invention.

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

[0039] 10. Housing assembly; 101. Pressure stabilizing chamber; 102. Oil replenishing chamber; 103. Adjusting chamber; 104. Oil inlet channel; 1041. First oil inlet section; 1042. Second oil inlet section; 105. Oil outlet channel; 1051. First oil outlet section; 1052. Second oil outlet section; 106. First flow channel; 107. Second flow channel; 108. Third flow channel; 109. Mounting chamber; 1091. First cavity; 1092. Second cavity; 11. First housing; 111. First groove; 112. First sealing groove; 12. Second housing; 121. First through hole; 122. Second sealing groove 13. Sealing groove; 13. Third housing; 131. Second through hole; 1311. Throttling step; 1312. Clearance notch; 132. Third groove; 133. Annular groove; 134. Through hole; 135. Guide groove; 136. Third sealing groove; 14. Fourth housing; 141. Second groove; 20. Adjustment assembly; 21. Elastic element; 211. First elastic element; 212. Second elastic element; 22. Plunger; 221. Annular outer flange; 222. Convex arc portion; 30. First sealing ring; 40. Second sealing ring; 50. Third sealing ring; y, first direction; x, second direction. Detailed Implementation

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] 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 scope of exemplary embodiments according to the invention. 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.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. 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 figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0043] To address the problem of limited adjustment range in throttling devices used in heavy equipment with high hydraulic pressure and a wide adjustment range, an embodiment of this application provides a throttling device. The throttling device of this application will be described in detail below with reference to the accompanying drawings.

[0044] See Figures 1 to 12 As shown, according to an embodiment of this application, a throttling device is provided, which includes a housing assembly 10 and an adjustment assembly 20.

[0045] The outer casing assembly 10 includes a pressure stabilizing chamber 101, an oil replenishing chamber 102, an adjusting chamber 103, an oil inlet channel 104, an oil outlet channel 105, a first flow channel 106, a second flow channel 107, and a third flow channel 108. The oil inlet channel 104 and the oil outlet channel 105 are connected through the first flow channel 106, and the oil inlet channel 104 and the pressure stabilizing chamber 101 are connected through the second flow channel 107. The pressure stabilizing chamber 101 and the oil replenishing chamber 102 are connected through multiple mounting chambers 109. The oil replenishing chamber 102 is connected to the oil outlet channel 105. The adjusting chamber 103 surrounds the outer periphery of the mounting chamber 109, and the adjusting chamber 103 and the oil inlet channel 104 are connected through the third flow channel 108. Multiple adjustment components 20 are provided, one-to-one in multiple mounting chambers 109. Each adjustment component 20 includes an elastic element 21 and a plunger 22. The plunger 22 divides the mounting chamber 109 into a first cavity 1091 and a second cavity 1092. The first cavity 1091 is connected to the pressure stabilizing chamber 101, and the second cavity 1092 is connected to the adjustment chamber 103 and the oil replenishment chamber 102. The plunger 22 can slide back and forth along the extension direction of the mounting chamber 109 to adjust the flow area of ​​the adjustment chamber 103 and the second cavity 1092. The elastic element 21 extends and retracts along the extension direction of the mounting chamber 109 and abuts against the plunger 22 and the inner wall of the mounting chamber 109.

[0046] In this application, the throttling device has multiple mounting chambers 109 internally, and each mounting chamber 109 is equipped with a plunger 22 that can slide back and forth along the extension direction of the mounting chamber 109 to adjust the flow area of ​​the regulating chamber 103 and the second cavity 1092. By using multiple regulating components 20 instead of the previous method of using a single regulating component 20, the throttling device of this application can solve the problem of small regulating range of throttling devices in heavy equipment with large oil pressure and large regulating range. In actual operation, the hydraulic oil enters the housing assembly 10 from the oil inlet channel 104 and is divided into three oil paths. Among them, the first oil path is where the hydraulic oil enters the housing assembly 10 from the oil inlet channel 104, and a portion of the hydraulic oil flows from the first flow channel 106 into the oil outlet channel 105. Because hydraulic oil has a certain viscosity, a pressure drop occurs as it passes through the first flow channel 106 due to the damping effect of the first flow channel 106 (i.e., the pressure of the hydraulic oil flowing out of the first flow channel 106 is lower than the pressure of the hydraulic oil flowing into the first flow channel 106). The hydraulic oil then flows directly out from the oil outlet channel 105 to the outside of the housing assembly 10 to support the load. In the second oil circuit, the hydraulic oil enters the housing assembly 10 from the oil inlet channel 104, and then enters the pressure stabilizing chamber 101 from the second flow channel. Since the first cavity 1091 is connected to the pressure stabilizing chamber 101, the hydraulic oil in the pressure stabilizing chamber 101 will enter each of the first cavities 1091. The third oil circuit is where hydraulic oil enters the housing assembly 10 from the inlet channel 104 and then flows into the regulating chamber 103 from the third flow channel 108. It then enters each of the second cavities 1092 from the regulating chamber 103, and subsequently enters the replenishing chamber 102. Finally, it flows out from the outlet channel 105 to the outside of the housing assembly 10 to support the load.

[0047] It should be noted that when the load pressure on the throttling device is zero, the plunger 22 slides towards the oil replenishment chamber 102 under the push of the hydraulic oil in the first cavity 1091, thereby completely sealing the opening at the connection between the regulating chamber 103 and the second cavity 1092. At this time, the flow area between the regulating chamber 103 and the second cavity 1092 (i.e., the actual interface area between the regulating chamber 103 and the second cavity 1092 that hydraulic oil can flow through) is zero, and the hydraulic oil in the regulating chamber 103 cannot flow into the second cavity 1092. The throttling device continuously supplies hydraulic oil to devices such as the hydraulic slider (not shown in the figure) through the first oil circuit to support the load. When the load pressure on the throttling device is not zero, as the load pressure increases, the load pressure will be transmitted to the hydraulic oil in the oil replenishment chamber 102 through the hydraulic oil in the oil outlet channel 105, and then to the hydraulic oil in the second cavity 1092, and finally act on the plunger 22. Under the pressure of the load, the plunger 22 slides towards the pressure stabilizing chamber 101, thereby opening the opening at the connection between the regulating chamber 103 and the second cavity 1092. During this process, the opening at the connection between the regulating chamber 103 and the second cavity 1092 increases with the increase of the load pressure and decreases with the decrease of the load pressure, thereby achieving the purpose of automatically adjusting the flow area of ​​the regulating chamber 103 and the second cavity 1092 according to the load size.

[0048] In other words, compared to existing throttling devices that use a single plunger 22, the throttling device of this application uses multiple plungers 22 to adjust the flow area of ​​the regulating chamber 103 and the second cavity 1092, thus giving the throttling device a larger adjustment range. This makes it suitable for heavy equipment applications with high oil pressure and a large adjustment range. Compared to a single plunger 22, when the pressure difference between the hydraulic oil in the inlet channel 104 and the hydraulic oil flowing out of the first flow channel 106 (i.e., the adjustment range of the throttling device) is large, the throttling device of this application can distribute this pressure difference to multiple plungers 22 for adjustment, thereby reducing the hydraulic oil pressure borne by each plunger 22. Therefore, the regulating device of this application not only has the advantage of a large adjustment range but is also less prone to damage, thus having a longer service life.

[0049] Further, see Figures 1 to 5As shown, the housing assembly 10 includes a first housing 11, a second housing 12, a third housing 13, and a fourth housing 14. The first housing 11, the second housing 12, the third housing 13, and the fourth housing 14 are sequentially fixedly connected along a first direction. The first housing 11 has a first groove 111 on the side near the second housing 12 so that the first housing 11 and the second housing 12 surround each other to form an oil replenishment chamber 102. The fourth housing 14 has a second groove 141 on the side near the third housing 13 so that the fourth housing 14 and the third housing 13 surround each other to form a pressure stabilizing chamber 101. The second housing 12 has a plurality of first through holes 121 extending in a direction away from the third housing 13 and penetrating the second housing 12. The third housing 13 has a plurality of second through holes 131 extending in a direction away from the second housing 12 and penetrating the third housing 13. Each first through hole 121 and each second through hole 131 are arranged in a one-to-one correspondence so that the second housing 12 and the third housing 13 surround each other to form a plurality of mounting chambers 109. The oil replenishment chamber 102 and the pressure stabilizing chamber 101 are connected through the plurality of mounting chambers 109. The third housing 13 is provided with a third groove 132 on the side near the second housing 12. The third groove 132 surrounds the outer periphery of each second through hole 131 so that the second housing 12 and the third housing 13 surround and form an adjustment cavity 103.

[0050] Specifically, the housing assembly 10 of this application is composed of multiple housings (a first housing 11, a second housing 12, a third housing 13, and a fourth housing 14), which are arranged along a first direction (i.e., Figure 3 and Figure 4 The components (in the direction indicated by y) are sequentially fixed and connected. This modular design not only facilitates the processing of the internal structure of the throttling device (i.e., the pressure stabilizing chamber 101, the oil replenishing chamber 102, the regulating chamber 103, the oil inlet channel 104, the oil outlet channel 105, the first flow channel 106, the second flow channel 107, and the third flow channel 108, etc.), but also simplifies the assembly process. Furthermore, it allows for a more compact structure of the throttling device, as the use of multiple housings facilitates a rational layout of the internal structure, thus saving space to some extent. The oil replenishing chamber 102 and the pressure stabilizing chamber 101 are formed by the first groove 111 and the second groove 141, respectively, for storing or transmitting hydraulic oil. This allows for replenishment of the oil output from the oil outlet channel 105 when the load pressure of the throttling device increases, thereby ensuring the pressure stability of the hydraulic system (such as a hydraulic machine tool) where the throttling device is installed.

[0051] For example, the first housing 11, the second housing 12, the third housing 13 and the fourth housing 14 can be fixed by welding, by adhesive bonding, or by fasteners (not shown in the figure). This embodiment shows the case where the first housing 11, the second housing 12, the third housing 13 and the fourth housing 14 are fixed by fasteners.

[0052] Further, see Figures 1 to 5 As shown, the first housing 11 is provided with a first oil inlet section 1041 and a first oil outlet section 1051 extending along a first direction and penetrating the first housing 11, and the first oil outlet section 1051 is connected to the oil replenishment chamber 102. The second housing 12 is provided with a second oil inlet section 1042 and a second oil outlet section 1052 extending along a first direction and penetrating the second housing 12. The first oil inlet section 1041 and the second oil inlet section 1042 are connected to form an oil inlet channel 104. The first oil outlet section 1051 and the second oil outlet section 1052 are connected to form an oil outlet channel 105. The third housing 13 includes an annular groove 133, which is located at one end of the third housing 13 near the second housing 12. The annular groove 133 is arranged around the outer periphery of the regulating chamber 103 to form a first flow channel 106. The oil inlet channel 104 and the oil outlet channel 105 are connected through the first flow channel 106. The third housing 13 is provided with a through hole 134, which extends along the first direction and penetrates the third housing 13 to form a second flow channel 107. The oil inlet channel 104 and the pressure stabilizing chamber 101 are connected through the second flow channel 107. The third housing 13 is provided with a guide groove 135, which is located at one end of the third housing 13 near the second housing 12 to form a third flow channel 108. One end of the guide groove 135 is connected to the oil inlet channel 104, and the other end of the guide groove 135 is connected to the regulating chamber 103.

[0053] Specifically, the first oil inlet section 1041 and the second oil inlet section 1042 both extend along the first direction and connect to form a single oil inlet channel 104, while the first oil outlet section 1051 and the second oil outlet section 1052 both extend along the first direction and connect to form a single oil outlet channel 105. This design can shorten the length of the oil inlet channel 104 and the oil outlet channel 105 to a certain extent, thereby simplifying the path of hydraulic oil entering and exiting the throttling device, reducing potential blockage points in the throttling device, and improving the efficiency of the throttling device. In addition, the oil replenishment chamber 102 is connected to the oil outlet channel 105 through the first oil outlet section 1051, instead of opening a separate channel to supply oil to load-bearing devices such as hydraulic sliders. This design can enhance the connection between the internal oil circuits of the throttling device (i.e., the first oil circuit, the second oil circuit, and the third oil circuit mentioned above), so that the throttling device can respond quickly when the load pressure changes. The pressure stabilizing chamber 101 is connected to the oil inlet channel 104 through the second flow channel 107, and the pressure stabilizing chamber 101 is also connected to the first cavity 1091. This allows for continuous pressure to be provided to the end of the plunger 22 near the pressure stabilizing chamber 101, so that it can work together with the pressure of the plunger 22 near the oil replenishment chamber 102 to keep the plunger 22 in force balance. This allows for dynamic adjustment of the flow area of ​​the regulating chamber 103 and the second cavity 1092 to cope with different load pressures.

[0054] Furthermore, an annular groove 133 is arranged around the outer periphery of the regulating cavity 103 to form a first flow channel 106, through which the oil inlet channel 104 and the oil outlet channel 105 are connected. In this application, the cross-sectional shape obtained by cutting the first flow channel 106 along the first direction can be rectangular or circular, etc. This embodiment shows the case where the cross-sectional shape of the first flow channel 106 is rectangular. Meanwhile, in actual manufacturing, the cross-sectional area of ​​the first flow channel 106 is smaller than that along the second direction (i.e.,...). Figure 3 and Figure 4 The area of ​​the oil inlet channel 104 is cut off in the direction indicated by x. Because hydraulic oil has a certain viscosity, the hydraulic oil flowing through the first flow channel 106 will generate a certain pressure drop. This pressure drop is the adjustment range of the throttling device of this application. This application can reasonably adjust the cross-sectional shape and area of ​​the first flow channel 106 according to actual needs, thereby adjusting the adjustment range of the throttling device. Furthermore, because this application uses a multi-plunger 22 adjustment method, the throttling device of this application is still applicable in hydraulic systems with a large adjustment range. In addition, the third flow channel 108 formed by the guide groove 135 connects the oil inlet channel 104 to the adjustment chamber 103, allowing the adjustment chamber 103 to provide hydraulic oil to the replenishment chamber 102 as needed, so that the hydraulic oil volume of the outlet channel 105 can be replenished at any time when the load pressure increases.

[0055] Further, see Figure 1 , Figure 9 as well as Figure 10 As shown, each of the second through holes 131 is provided with a throttling step 1311 at one end near the second housing 12, and there is a clearance notch 1312 between the throttling step 1311 and the second housing 12. The regulating cavity 103 is connected to each mounting cavity 109 through the clearance notch 1312.

[0056] Specifically, along the first direction, the plane containing the end of each second through hole 131 near the second housing 12 is higher than the plane where the third housing 13 fits against the second housing 12. This allows for the formation of a throttling step 1311 and a clearance notch 1312 between the regulating cavity 103 and each second through hole 131. In this application, the size of the clearance notch 1312 can be reasonably adjusted according to actual needs, and should not be set too large or too small. If the clearance notch 1312 is set too large, it may result in excessive ineffective stroke of the plunger 22, leading to a slow response speed of the throttling device. If the clearance notch 1312 is set too small, it may result in the plunger 22 being unable to effectively adjust the flow area between the regulating cavity 103 and the second cavity 1092.

[0057] Further, see Figures 2 to 5 , Figure 9 as well as Figure 10As shown, each elastic element 21 includes a first elastic element 211 and a second elastic element 212. Each plunger 22 is movably disposed in each mounting chamber 109 and at least partially located in the clearance notch 1312. One of the first elastic element 211 and the second elastic element 212 is located in the first cavity 1091 and abuts against the inner wall of the plunger 22 and the first cavity 1091. The other of the first elastic element 211 and the second elastic element 212 is located in the second cavity 1092 and abuts against the inner wall of the plunger 22 and the second cavity 1092. The plunger 22 can reciprocate between the throttling step 1311 and the second housing 12 to adjust the flow area of ​​the regulating cavity 103 and the second cavity 1092.

[0058] Specifically, the first elastic element 211 and the second elastic element 212 are located in different cavities (first cavity 1091 and second cavity 1092) and abut against the plunger 22 and the corresponding cavity inner wall. This embodiment shows the case where the first elastic element 211 is located in the first cavity 1091 and the second elastic element 212 is located in the second cavity 1092. The movement of the plunger 22 can directly change the flow area between the regulating cavity 103 and the second cavity 1092, thereby affecting the amount of hydraulic oil passing through this area. By controlling the movement of the plunger 22, the amount of hydraulic oil flowing out of the outlet channel 105 of the throttling device can be controlled. Due to the design of the plunger 22 and the elastic element 21, the throttling device can react quickly according to the pressure change of the load (i.e., quickly adjust the amount of hydraulic oil flowing out of the outlet channel 105). When the load pressure increases, the load pressure acts on the end of the plunger 22 near the replenishing chamber 102 through the oil outlet passage 105, the replenishing chamber 102, and the second cavity 1092, thereby pushing the plunger 22 to move in the first direction to increase the flow area of ​​the regulating chamber 103 and the second cavity 1092, and thus increase the oil output of the oil outlet passage 105. When the load pressure decreases, the hydraulic oil in the first cavity 1091 can push the plunger 22 to move along the end near the replenishing chamber 102 to reduce the flow area of ​​the regulating chamber 103 and the second cavity 1092, thereby reducing the oil output of the oil outlet passage 105. This adaptive mechanism helps maintain the stable operation of the hydraulic system. When the load pressure decreases to zero, the flow area of ​​the regulating chamber 103 and the second cavity 1092 also decreases to zero, at which point the second oil circuit inside the throttling device is not open. Furthermore, the first elastic element 211 and the second elastic element 212 of this application can be at least one of a spring, a disc spring, and a rubber elastic element. This embodiment shows the case where both the first elastic element 211 and the second elastic element 212 are springs.

[0059] Further, see Figure 3 , Figure 5 , Figure 10 as well as Figure 12As shown, each plunger 22 also includes an annular outer flange 221, which surrounds the outer periphery of the plunger 22 and protrudes in the radial direction of the plunger 22. The annular outer flange 221 is located at the clearance notch 1312 to limit the range of movement of the plunger 22.

[0060] Specifically, the design of the annular outer flange 221 significantly enhances the functionality and reliability of the system plunger 22. Located within the clearance notch, the annular outer flange 221 effectively limits the range of motion of the plunger 22, ensuring that the plunger 22 slides between the throttling step 1311 and the second housing 12. The presence of the annular outer flange 221 creates an additional sealing surface between the plunger 22 and the second housing 12, especially when the plunger 22 is in its extreme position (i.e., when the annular outer flange 221 is in contact with the second housing 12). This design helps reduce the possibility of hydraulic oil leakage, ensuring that hydraulic oil does not leak from the regulating chamber 103 to the replenishing chamber 102 when the throttling device does not require replenishment via the second oil circuit, thus enabling the throttling device to function as a throttling device. Meanwhile, the annular outer flange 221 also acts as a physical barrier, increasing the safety of the throttling device. Even under abnormal operating conditions, such as sudden pressure fluctuations in the hydraulic system where the throttling device is located, the annular outer flange 221 can provide some protection for the plunger 22, preventing it from sliding out of its stroke and damaging the internal structure of the throttling device. Furthermore, the cooperation between the annular outer flange 221 and the clearance notch 1312 allows for more precise control of the final position of the plunger 22. This is crucial for applications requiring high-precision flow regulation. By adjusting the lengths of the clearance notch 1312 and the annular outer flange 221 along the first direction, the regulation accuracy and response speed of the throttling device can be adjusted, thereby ensuring the efficient and stable operation of the hydraulic system where the throttling device is located.

[0061] Further, see Figure 3 , Figure 5 , Figure 10 as well as Figure 12 As shown, each plunger 22 also includes a convex arc portion 222, which is located at one end of the plunger 22 near the second cavity 1092, and the center of the convex arc portion 222 is located on the side of the plunger 22 near the first cavity 1091. The convex arc portion 222 is at least used to adjust the flow area of ​​the regulating cavity 103 and the second cavity 1092 when the plunger 22 slides back and forth in the first direction.

[0062] Specifically, the design of the convex arc portion 222 enables the throttling device of this application to control the plunger 22 along the extension direction of the mounting chamber 109 (i.e., Figure 3 and Figure 4Sliding the adjustment chamber 103 in the direction indicated by y) can adjust the flow area of ​​the adjustment chamber 103 and the second cavity 1092. When the load pressure increases, the load pressure will act on the end of the plunger 22 near the oil replenishment chamber 102 through the oil outlet channel 105, the oil replenishment chamber 102 and the second cavity 1092, thereby pushing the plunger 22 to move in the first direction. During this process, the gap between the convex arc portion 222 and the opening of the second cavity 1092 near the third housing will become larger and larger, thereby increasing the flow area of ​​the adjustment chamber 103 and the second cavity 1092, so that the throttling device can replenish the amount of hydraulic oil flowing out of the oil outlet channel 105 through the second oil circuit.

[0063] Further, see Figure 2 , Figure 7 , Figure 9 as well as Figure 11 As shown, the radius of the first through hole 121 is equal to the radius of the second through hole 131, and the outer diameter of the annular outer flange 221 is larger than the radii of the first through hole 121 and the second through hole 131. Specifically, the equal radius of the first through hole 121 and the second through hole 131 not only ensures the sealing of the mounting chamber 109 formed after the second housing 12 and the third housing 13 are assembled, but also limits the movement range of the plunger 22. If the radius of the first through hole 121 is larger than the radius of the second through hole 131, the plunger 22 may exceed its stroke and slide too far into the second cavity 1092 when moving in the direction closer to the second housing 12, resulting in an unnecessary increase in the stroke of the plunger 22, affecting the response speed and adjustment accuracy of the throttling device. The outer diameter of the annular outer flange 221 is larger than the radius of the first through hole 121 and the second through hole 131, which can ensure that the annular outer flange 221 can be locked in the clearance notch 1312 along the radial direction of the first through hole 121 and the second through hole 131, so as to ensure that the plunger 22 can move within the limited range (i.e., between the throttling step 1311 and the second housing 12).

[0064] Further, see Figure 2 , Figure 7 as well as Figure 8As shown, the radius of each first through hole 121 near the first housing 11 is smaller than the radius of the first through hole 121 away from the first housing 11. This design allows the first through hole 121 near the first housing 11 to generate a pressure drop effect similar to that of the first flow channel 106. When the load pressure is transmitted from the oil replenishment chamber 102 to the plunger 22, the hydraulic oil pressure is reduced after flowing into the first through hole 121 near the first housing 11 due to its certain pressure. This prevents the pressure acting on the plunger 22 from becoming too large, thus avoiding damage to the plunger 22 from excessive impact. Simultaneously, the design of the radius of the first through hole 121 near the first housing 11 being smaller than the radius of the first through hole 121 away from the first housing 11 also cleverly provides a support position for the installation of the elastic element 21, simplifying the installation of the elastic element 21 to some extent. Furthermore, the throttling device of this application can not only control the adjustment accuracy of the throttling device by controlling the number of installation chambers 109, but also control the adjustment accuracy of the throttling device by adjusting the radius of the first through hole 121 near the end of the first housing 11.

[0065] Further, see Figures 1 to 4 , Figures 6 to 10 As shown, the throttling device also includes a first sealing ring, a second sealing ring, and a third sealing ring. The first sealing ring is disposed between the first housing 11 and the second housing 12 and extends along the outer periphery of the first housing 11. The second sealing ring is located between the second housing 12 and the third housing 13 and extends along the outer periphery of the second housing 12. The third sealing ring is located between the third housing 13 and the fourth housing 14 and extends along the outer periphery of the third housing 13.

[0066] Specifically, at least one of the first housing 11 and the second housing 12 is provided with a first sealing groove 112 for installing a first sealing ring 30, at least one of the second housing 12 and the third housing 13 is provided with a second sealing groove 122 for installing a second sealing ring 40, and at least one of the third housing 13 and the fourth housing 14 is provided with a third sealing groove 136 for installing a third sealing ring 50. This embodiment shows the case where the first sealing groove 112 is provided on the first housing 11, the second sealing groove 122 is provided on the second housing 12, and the third sealing groove 136 is provided on the third housing 13. This application provides a first sealing ring 30, a second sealing ring 40, and a third sealing ring 50 in the throttling device to improve the sealing performance of the throttling device through a multi-layer sealing structure, ensuring that hydraulic oil does not leak from the gaps between the housings (i.e., the first housing 11, the second housing 12, the third housing 13, and the fourth housing 14), thereby ensuring the stability of the hydraulic system in which the throttling device is located to a certain extent, and also preventing dust and other impurities from the external environment from entering the interior of the throttling device and contaminating the hydraulic oil.

[0067] From the above description, it can be seen that this application, by designing a throttling device composed of a housing assembly 10, an adjusting assembly 20, a first sealing ring 30, a second sealing ring 40, and a third sealing ring 50, can at least solve the problem of small adjustment range of throttling devices in heavy equipment with large oil pressure and large adjustment range. Hydraulic oil enters the housing assembly 10 from the inlet channel 104 and is divided into three oil paths. The first oil path involves hydraulic oil entering the first flow channel 106 from the inlet channel 104, and then flowing directly out through the outlet channel 105 to the outside of the housing assembly 10 to provide load support for structures such as hydrostatic sliders or hydrostatic guide rails. The second oil path involves hydraulic oil flowing from the inlet channel 104 into the second flow channel 107, and under the guiding action of the second flow channel 107, entering the pressure stabilizing chamber 101, and then entering the first cavity 1091 to push the plunger 22 to move or to balance the force on the plunger 22. The third oil circuit involves hydraulic oil flowing from the inlet channel 104 into the third flow channel 108, and then into the regulating chamber 103. When the flow area between the regulating chamber 103 and the second cavity 1092 is not zero, the hydraulic oil can enter each of the second cavities 1092 through the regulating chamber 103, then into the replenishing chamber 102, and finally flow out from the outlet channel 105 to the outside of the housing assembly 10 to support the load. In actual operation, the throttling device can use the pressure difference between the first cavity 1091 and the second cavity 1092 caused by the load change, as well as the change in the resultant force of the two elastic elements (i.e., the first elastic element 211 and the second elastic element 212), to change the direction of the resultant force on the plunger 22, thereby pushing the plunger 22 to move back and forth in the first direction to adjust the size of the gap between the convex arc portion 222 and the opening of the second cavity 1092 near the third housing, thereby adjusting the flow area between the regulating chamber 103 and the second cavity 1092.

[0068] As can be seen, compared with existing throttling devices that use a single plunger 22, the throttling device of this application uses multiple plungers 22 to adjust the flow area of ​​the regulating chamber 103 and the second cavity 1092. This allows the hydraulic oil pressure inside the throttling device to be distributed across multiple plungers 22 for adjustment, resulting in a lower hydraulic oil pressure on each plunger 22 and making it less prone to damage. Furthermore, because the throttling device uses multiple adjusting components 20, it can still operate even if one or more adjusting components 20 fail, thus making the throttling device of this application more reliable.

[0069] 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.

[0070] 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 should not be construed as limiting the scope of protection of this invention.

[0071] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A throttling device, characterized in that, include: The housing assembly (10) includes a pressure regulating chamber (101), an oil replenishing chamber (102), an adjusting chamber (103), an oil inlet channel (104), an oil outlet channel (105), a first flow channel (106), a second flow channel (107), and a third flow channel (108). The oil inlet channel (104) and the oil outlet channel (105) are connected through the first flow channel (106), and the oil inlet channel (104) and the oil outlet channel (108) are connected through the first flow channel (106). The pressure stabilizing chamber (101) is connected through the second flow channel (107), the pressure stabilizing chamber (101) and the oil replenishing chamber (102) are connected through multiple mounting chambers (109), the oil replenishing chamber (102) is connected to the oil outlet channel (105), the regulating chamber (103) surrounds the outer periphery of the mounting chamber (109), and the regulating chamber (103) is connected to the oil inlet channel (104) through the third flow channel (108); An adjustment assembly (20) is provided, wherein there are multiple adjustment assemblies (20), each of which is correspondingly disposed in one of the multiple mounting chambers (109). Each adjustment assembly (20) includes an elastic element (21) and a plunger (22). The plunger (22) divides the mounting chamber (109) into a first cavity (1091) and a second cavity (1092). The first cavity (1091) is connected to the voltage stabilizing chamber (101). The second cavity (1092) connects the regulating cavity (103) and the oil replenishing cavity (102). The plunger (22) can slide back and forth along the extension direction of the mounting chamber (109) to adjust the flow area of ​​the regulating cavity (103) and the second cavity (1092). The elastic element (21) extends and retracts along the extension direction of the mounting chamber (109) and abuts against the plunger (22) and the inner wall of the mounting chamber (109).

2. The throttling device according to claim 1, characterized in that, The outer casing assembly (10) includes a first casing (11), a second casing (12), a third casing (13), and a fourth casing (14); The first housing (11), the second housing (12), the third housing (13), and the fourth housing (14) are sequentially fixedly connected along a first direction. The first housing (11) has a first groove (111) on the side near the second housing (12) to allow the first housing (11) and the second housing (12) to surround and form the oil replenishment chamber (102). The fourth housing (14) has a second groove (141) on the side near the third housing (13) to allow the fourth housing (14) and the third housing (13) to surround and form the voltage stabilizing chamber (101). The second housing (12)... The second housing (12) is provided with a plurality of first through holes (121) extending in a direction away from the third housing (13) and penetrating the second housing (12). The third housing (13) is provided with a plurality of second through holes (131) extending in a direction away from the second housing (12) and penetrating the third housing (13). Each first through hole (121) and each second through hole (131) are provided in a one-to-one correspondence so that the second housing (12) and the third housing (13) surround and form a plurality of mounting chambers (109). The oil replenishment chamber (102) and the pressure stabilizing chamber (101) are connected through the plurality of mounting chambers (109). The third housing (13) has a third groove (132) on the side near the second housing (12). The third groove (132) surrounds the outer periphery of each of the second through holes (131) so that the second housing (12) and the third housing (13) surround and form the adjustment cavity (103).

3. The throttling device according to claim 2, characterized in that, The first housing (11) is provided with a first oil inlet section (1041) and a first oil outlet section (1051) extending along the first direction and penetrating the first housing (11), and the first oil outlet section (1051) communicates with the oil replenishment chamber (102). The second housing (12) is provided with a second oil inlet section (1042) and a second oil outlet section (1052) extending along the first direction and penetrating the second housing (12). The first oil inlet section (1041) and the second oil inlet section (1042) are connected to form the oil inlet channel (1052). 04), the first oil outlet section (1051) and the second oil outlet section (1052) are connected to form the oil outlet channel (105), the third housing (13) includes an annular groove (133), the annular groove (133) is located at one end of the third housing (13) near the second housing (12), and the annular groove (133) is arranged around the outer periphery of the regulating cavity (103) to form the first flow channel (106), the oil inlet channel (104) and the oil outlet channel (105) are connected through the first flow channel (106); The third housing (13) is provided with a through hole (134), the through hole (134) extends along the first direction and penetrates the third housing (13) to form the second flow channel (107), the oil inlet channel (104) and the pressure stabilizing chamber (101) are connected through the second flow channel (107); The third housing (13) is provided with a flow guide groove (135), which is located at one end of the third housing (13) near the second housing (12) to form the third flow channel (108). One end of the flow guide groove (135) is connected to the oil inlet channel (104), and the other end of the flow guide groove (135) is connected to the regulating cavity (103).

4. The throttling device according to claim 2, characterized in that, Each of the second through holes (131) is provided with a throttling step (1311) at one end near the second housing (12), and there is a clearance notch (1312) between the throttling step (1311) and the second housing (12). The regulating cavity (103) is connected to each of the mounting chambers (109) through the clearance notch (1312).

5. The throttling device according to claim 4, characterized in that, Each of the elastic elements (21) includes a first elastic element (211) and a second elastic element (212); Each plunger (22) is movably disposed in each of the mounting chambers (109) and at least partially located in the clearance notch (1312). One of the first elastic member (211) and the second elastic member (212) is located in the first cavity (1091) and abuts against the inner wall of the plunger (22) and the first cavity (1091). The other of the first elastic member (211) and the second elastic member (212) is located in the second cavity (1092) and abuts against the inner wall of the plunger (22) and the second cavity (1092). The plunger (22) can reciprocate between the throttling step (1311) and the second housing (12) to adjust the flow area of ​​the regulating cavity (103) and the second cavity (1092).

6. The throttling device according to claim 5, characterized in that, Each of the plungers (22) further includes an annular outer flange (221) which surrounds the outer periphery of the plunger (22) and protrudes in the radial direction of the plunger (22), and the annular outer flange (221) is located in the clearance notch (1312) to limit the range of movement of the plunger (22).

7. The throttling device according to claim 5, characterized in that, Each of the plungers (22) further includes a convex arc portion (222), which is located at one end of the plunger (22) near the second cavity (1092), and the center of the convex arc portion (222) is located on the side of the plunger (22) near the first cavity (1091). The convex arc portion (222) is at least used to adjust the flow area of ​​the adjustment cavity (103) and the second cavity (1092) when the plunger (22) slides back and forth along the first direction.

8. The throttling device according to claim 6, characterized in that, The radius of the first through hole (121) is equal to the radius of the second through hole (131), and the outer diameter of the annular outer flange (221) is greater than the radii of the first through hole (121) and the second through hole (131).

9. The throttling device according to claim 2, characterized in that, The radius of each of the first through holes (121) near the end of the first housing (11) is smaller than the radius of each of the first through holes (121) away from the end of the first housing (11).

10. The throttling device according to claim 2, characterized in that, The throttling device also includes a first sealing ring, a second sealing ring, and a third sealing ring; The first sealing ring is disposed between the first housing (11) and the second housing (12) and extends along the outer periphery of the first housing (11); the second sealing ring is located between the second housing (12) and the third housing (13) and extends along the outer periphery of the second housing (12); and the third sealing ring is located between the third housing (13) and the fourth housing (14) and extends along the outer periphery of the third housing (13).

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