Throttling device

Abstract

The invention discloses a throttling device. The throttling device comprises a shell assembly and an adjusting assembly. A plurality of oil cavities and a plurality of flow channels are formed in the shell assembly, and the oil inlet channel and the oil outlet channel are connected through the first flow channel and connected to the pressure stabilizing cavity through the second flow channel. The pressure stabilizing cavity is communicated with the oil supplementing cavity through a plurality of installation cavities, and the oil supplementing cavity is further connected with the oil outlet channel. The adjusting cavity surrounds the outer side of the mounting cavity and is connected with the oil inlet channel through a third flow channel. Adjusting assemblies composed of elastic elements and plungers are located in the installation cavities, and the installation cavities are divided into first cavities and second cavities through the plungers. The first cavity is communicated with the pressure stabilizing cavity, and the second cavity is connected with the adjusting cavity and the oil supplementing cavity. The plunger can slide in the cavity to change the through-flow area between the adjusting cavity and the second cavity, and the elastic element stretches out and draws back between the plunger and the inner wall of the cavity to assist the plunger in moving. The throttling device at least can solve the problem that the throttling device is small in adjusting range on the occasion of large oil pressure and large adjusting range of heavy equipment.

Description

Technical Field

[0001] The invention relates to the technical field of liquid static pressure throttling devices, and in particular to a throttling device. Background Art

[0002] The throttling device is a key component in the field of fluid mechanics for controlling fluid flow and pressure. It is widely used in many industries such as petroleum, chemical industry, electric power, refrigeration and air conditioning. It adjusts the speed or direction of the fluid by changing the flow cross-section of the fluid (i.e., changing the size of the conduction port of the regulating hole), thereby achieving the purpose of controlling the fluid flow. Common throttling devices include valves, orifice plates, nozzles, etc.

[0003] However, the existing throttling device has some shortcomings, especially in heavy equipment with large oil pressure and large adjustment range. The design of the traditional throttling device usually adopts a combination structure of a single adjustment hole and a single adjustment member to form the core component of the throttling device. Such a design is difficult to meet the requirements in the occasions where a large oil supply pressure and a large adjustment range are required, and often leads to a relatively small adjustment range of the throttling device. Therefore, such a throttling device cannot be applied to some hydraulic systems that require a large adjustment range. Summary of the invention

[0004] The main purpose of the present invention is to provide a throttling device, which at least solves the problem of a small adjustment range of the throttling device in heavy equipment with large oil pressure and large adjustment range.

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

[0006] A housing component, wherein a pressure stabilizing chamber, an oil replenishing chamber, an adjusting chamber, an oil inlet passage, an oil outlet passage, a first flow passage, a second flow passage, and a third flow passage are arranged in the housing component, wherein the oil inlet passage and the oil outlet passage are communicated through the first flow passage, and the oil inlet passage and the pressure stabilizing chamber are communicated through the second flow passage, the pressure stabilizing chamber and the oil replenishing chamber are communicated through a plurality of installation chambers, the oil replenishing chamber is communicated with the oil outlet passage, the adjusting chamber is surrounded by the outer peripheral side of the installation chamber, and the adjusting chamber is communicated with the oil inlet passage through the third flow passage;

[0007] An adjusting assembly, wherein there are multiple adjusting assemblies, and the multiple adjusting assemblies are arranged in a one-to-one correspondence in the multiple installation chambers. The adjusting assembly includes an elastic element and a plunger, and the plunger divides the installation chamber into a first cavity and a second cavity. The first cavity is connected to the pressure-stabilizing cavity, and the second cavity is connected to the adjusting cavity and the oil-making cavity. The plunger can slide back and forth along the extension direction of the installation chamber to adjust the size of the flow area between the adjusting cavity and the second cavity. The elastic element expands and contracts along the extension direction of the installation chamber and abuts between the plunger and the inner wall of the installation chamber.

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

[0009] Wherein, the first shell, the second shell, the third shell and the fourth shell are fixedly connected in sequence along the first direction, a first groove is provided on a side of the first shell close to the second shell so that the first shell and the second shell are surrounded to form the oil replenishing chamber, a second groove is provided on a side of the fourth shell close to the third shell so that the fourth shell and the third shell are surrounded to form the pressure stabilizing chamber, a plurality of first through holes extending in a direction away from the third shell and penetrating the second shell are provided on the second shell, a plurality of second through holes extending in a direction away from the second shell and penetrating the third shell are provided on the third shell, each of the first through holes is correspondingly provided to each of the second through holes so that the second shell and the third shell are surrounded to form a plurality of the installation chambers, and the oil replenishing chamber and the pressure stabilizing chamber are connected through the plurality of the installation chambers;

[0010] A third groove is disposed on a side of the third shell close to the second shell, and the third groove surrounds the outer circumference of each of the second through holes so that the second shell and the third shell are surrounded to form the adjustment cavity.

[0011] Further, the first shell is provided with a first oil inlet section and a first oil outlet section extending along the first direction and penetrating the first shell, and the first oil outlet section is communicated with the oil replenishing chamber, the second shell is provided with a second oil inlet section and a second oil outlet section extending along the first direction and penetrating the second shell, the first oil inlet section and the second oil inlet section are connected to form the oil inlet passage, the first oil outlet section and the second oil outlet section are connected to form the oil outlet passage, the third shell includes an annular groove, the annular groove is located at one end of the third shell close to the second shell, and the annular groove is arranged around the outer peripheral side of the regulating chamber to form the first flow passage, and the oil inlet passage and the oil outlet passage are communicated through the first flow passage;

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

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

[0014] Furthermore, a throttling step is provided at one end of each second through hole close to the second shell, and an avoidance gap is provided between the throttling step and the second shell, and the regulating cavity is connected with each installation cavity through the avoidance gap.

[0015] Further, each of the elastic elements comprises a first elastic member and a second elastic member;

[0016] Among them, each of the plungers is movably arranged in each of the installation chambers and is at least partially located in the avoidance gap, 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, and 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, and the plunger can slide back and forth between the throttling step and the second shell to adjust the size of the flow area between the regulating cavity and the second cavity.

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

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

[0019] Further, the radius of the first through hole is equal to the radius of the second through hole, and the outer diameter of the annular outer flange is larger than the radius of the first through hole and the second through hole.

[0020] Further, a radius of each of the first through holes close to one end of the first shell is smaller than a radius of each of the first through holes away from one end of the first shell.

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

[0022] Among them, the first sealing ring is arranged between the first shell and the second shell and extends along the outer circumference of the first shell, the second sealing ring is located between the second shell and the third shell and extends along the outer circumference of the second shell, and the third sealing ring is located between the third shell and the fourth shell and extends along the outer circumference of the third shell.

[0023] In the present invention, a plurality of installation chambers are arranged inside the throttling device, and each installation chamber is provided with a plunger that can slide back and forth along the extension direction of the installation chamber to adjust the size of the flow area between the adjustment chamber and the second cavity. By adopting a plurality of adjustment components to replace the previous adjustment method of adopting a single adjustment component, the throttling device of the present application can solve the problem of a small adjustment range of the throttling device in heavy equipment with large oil pressure and large adjustment range. In actual operation, the hydraulic oil is divided into three oil circuits after entering the housing assembly from the oil inlet channel. Among them, the first oil circuit is after the hydraulic oil enters the housing assembly from the oil inlet channel, and a part of the hydraulic oil flows from the first flow channel into the oil outlet channel. Since the hydraulic oil has a certain viscosity, the hydraulic oil will produce a pressure drop due to the damping effect of the first flow channel during the process of passing through the first flow channel (that is, the pressure of the hydraulic oil flowing out of the first flow channel will be reduced relative to the pressure of the hydraulic oil flowing into the first flow channel), and then directly flows out from the oil outlet channel to the outside of the housing assembly for supporting the load. The second oil circuit is that the hydraulic oil enters the housing assembly from the oil inlet channel, and then enters the pressure stabilizing chamber from 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 first cavity. The third oil circuit is that the hydraulic oil enters the housing assembly from the oil inlet channel, flows into the regulating chamber from the third flow channel, then enters each second cavity from the regulating chamber, then enters the oil replenishing chamber, and finally flows out from the oil outlet channel to the outside of the housing assembly to support the load.

[0024] It should be noted that when the load pressure borne by the throttling device is zero, the plunger slides in the direction close to the oil replenishing chamber under the push of the hydraulic oil in the first cavity, thereby completely closing the opening at the connection between the regulating cavity and the second cavity. At this time, the flow area between the regulating cavity and the second cavity (that is, the interface area between the regulating cavity and the second cavity that can actually be used for the hydraulic oil to flow) is zero, and the hydraulic oil in the regulating cavity cannot flow into the second cavity. The throttling device continues to provide hydraulic oil to the hydraulic slider and other devices through the first oil circuit for subsequent load support. When the load pressure borne by the throttling device is not zero, as the load pressure increases, the load pressure will be transmitted to the hydraulic oil in the oil replenishing chamber along with the hydraulic oil in the oil outlet channel, and then transmitted to the hydraulic oil in the second cavity, and finally act on the plunger. The plunger slides in the direction close to the pressure stabilizing chamber under the push of the load pressure, thereby opening the opening at the connection between the regulating cavity and the second cavity. During this process, the opening at the connection between the regulating chamber and the second cavity increases as the load pressure increases, and decreases as the load pressure decreases, thereby achieving the purpose of automatically adjusting the flow area of ​​the regulating chamber and the second cavity according to the size of the load. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0026] Figure 1 An exploded view of a throttling device disclosed in an embodiment of the present invention at a first viewing angle;

[0027] Figure 2 A cross-sectional view of an exploded view of the throttling device disclosed in an embodiment of the present invention at a second viewing angle;

[0028] Figure 3 A cross-sectional view of the throttling device disclosed in the embodiment of the present invention at a second viewing angle and when the plunger is away from the second housing;

[0029] Figure 4 A cross-sectional view of the throttling device disclosed in the embodiment of the present invention at a second viewing angle and when the plunger is close to the second housing;

[0030] Figure 5 for Figure 3 A magnified view of part A;

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

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

[0033] Figure 8 A cross-sectional view of the second housing disclosed in the embodiment of the present invention at a second viewing angle;

[0034] Fig. 9 A structural diagram of a third housing disclosed in an embodiment of the present invention;

[0035] Fig.10 A cross-sectional view of a third housing disclosed in an embodiment of the present invention at a second viewing angle;

[0036] Fig.11 A structural diagram of a fourth housing disclosed in an embodiment of the present invention;

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

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

[0039] 10. Shell 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. Installation 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 Sealing groove; 13, third shell; 131, second through hole; 1311, throttling step; 1312, avoidance gap; 132, third groove; 133, annular groove; 134, conducting hole; 135, guide groove; 136, third sealing groove; 14, fourth shell; 141, second groove; 20, adjustment assembly; 21, elastic element; 211, first elastic member; 212, second elastic member; 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 DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention 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 exemplary embodiments according to the present invention. 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 "comprising" and / or "including" are used in this specification, it indicates 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 described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In order to solve the problem of small adjustment range of throttling device in heavy equipment with large oil pressure and large adjustment range, a throttling device is provided according to an embodiment of the present application. The throttling device of the present application will be described in detail below with reference to the accompanying drawings.

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

[0045] Among them, 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 are provided in the housing component 10. 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 a plurality of installation chambers 109, the oil replenishing chamber 102 is connected with the oil outlet channel 105, the adjusting chamber 103 is surrounded by the outer peripheral side of the installation chamber 109, and the adjusting chamber 103 and the oil inlet channel 104 are connected through the third flow channel 108. There are multiple adjusting components 20, and the multiple adjusting components 20 are arranged in a one-to-one correspondence in the multiple installation chambers 109. The adjusting components 20 include an elastic element 21 and a plunger 22. The plunger 22 divides the installation chamber 109 into a first cavity 1091 and a second cavity 1092. The first cavity 1091 is connected to the pressure stabilizing cavity 101, and the second cavity 1092 is connected to the adjusting cavity 103 and the oil replenishing cavity 102. The plunger 22 can slide back and forth along the extension direction of the installation chamber 109 to adjust the size of the flow area between the adjusting cavity 103 and the second cavity 1092. The elastic element 21 expands and contracts along the extension direction of the installation chamber 109 and abuts between the plunger 22 and the inner wall of the installation chamber 109.

[0046] In the present application, a plurality of installation chambers 109 are arranged inside the throttling device, and each installation chamber 109 is provided with a plunger 22 which can slide back and forth along the extension direction of the installation chamber 109 to adjust the size of the flow area between the adjustment chamber 103 and the second cavity 1092. By adopting a plurality of adjustment components 20 to replace the previous adjustment method of adopting a single adjustment component 20, the throttling device of the present application can solve the problem of a small adjustment range of the throttling device in heavy equipment with large oil pressure and large adjustment range. In actual operation, the hydraulic oil is divided into three oil circuits after entering the housing assembly 10 from the oil inlet channel 104. Among them, the first oil circuit is after the hydraulic oil enters the housing assembly 10 from the oil inlet channel 104, and a part of the hydraulic oil flows from the first flow channel 106 into the oil outlet channel 105. Since the hydraulic oil has a certain viscosity, the hydraulic oil will produce a pressure drop due to the damping effect of the first flow channel 106 when passing through the first flow channel 106 (that is, the pressure of the hydraulic oil flowing out of the first flow channel 106 will be reduced relative to the pressure of the hydraulic oil flowing into the first flow channel 106), and then directly flow out from the oil outlet channel 105 to the outside of the housing assembly 10 to support the load. The second oil circuit is that 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 first cavity 1091. The third oil circuit is that the hydraulic oil enters the housing assembly 10 from the oil inlet channel 104 and then flows into the regulating chamber 103 from the third flow channel 108, then enters each second cavity 1092 from the regulating chamber 103, and then enters the oil replenishing chamber 102, and finally flows out from the oil 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 in the direction close to the oil replenishing chamber 102 under the push of the hydraulic oil in the first cavity 1091, thereby completely closing the opening at the connection between the regulating cavity 103 and the second cavity 1092. At this time, the flow area between the regulating cavity 103 and the second cavity 1092 (i.e., the interface area between the regulating cavity 103 and the second cavity 1092 that can actually be used for the hydraulic oil to flow through) is zero, and the hydraulic oil in the regulating cavity 103 cannot flow into the second cavity 1092. The throttling device continues to provide hydraulic oil to the hydraulic slider (not shown in the figure) and other devices through the first oil circuit for subsequent load support. 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 replenishing chamber 102 along with the hydraulic oil in the oil outlet channel 105, and then transmitted to the hydraulic oil in the second cavity 1092, and finally act on the plunger 22. The plunger 22 slides in the direction close to the pressure stabilizing chamber 101 under the push of the load pressure, thereby opening the opening at the connection between the regulating chamber 103 and the second cavity 1092. In 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 size of the flow area of ​​the regulating chamber 103 and the second cavity 1092 according to the size of the load.

[0048] That is to say, compared with the existing throttling device using a single plunger 22, the throttling device of the present application uses multiple plungers 22 to adjust the size of the flow area between the regulating chamber 103 and the second cavity 1092, so that the throttling device has a larger adjustment range and can be used in heavy equipment with large oil pressure and large adjustment range. Compared with a single plunger 22, when the pressure difference between the hydraulic oil in the oil 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 the present application can distribute the pressure difference to multiple plungers 22 for adjustment, so that the hydraulic oil pressure on each plunger 22 is smaller. Therefore, the regulating device of the present application not only has the advantage of a large adjustment range, but is also not easy to be damaged, so it also has a longer service life.

[0049] Further, see Figures 1 to 5As shown, the housing assembly 10 includes a first shell 11 , a second shell 12 , a third shell 13 and a fourth shell 14 . Among them, the first shell 11, the second shell 12, the third shell 13 and the fourth shell 14 are fixedly connected in sequence along the first direction, a first groove 111 is provided on a side of the first shell 11 close to the second shell 12 so that the first shell 11 and the second shell 12 are surrounded by an oil replenishing chamber 102, a second groove 141 is provided on a side of the fourth shell 14 close to the third shell 13 so that the fourth shell 14 and the third shell 13 are surrounded by a pressure stabilizing chamber 101, a plurality of first through holes 121 extending in a direction away from the third shell 13 and penetrating the second shell 12 are provided on the second shell 12, a plurality of second through holes 131 extending in a direction away from the second shell 12 and penetrating the third shell 13 are provided on the third shell 13, each first through hole 121 is correspondingly arranged with each second through hole 131 so that the second shell 12 and the third shell 13 are surrounded by a plurality of installation chambers 109, and the oil replenishing chamber 102 and the pressure stabilizing chamber 101 are connected through the plurality of installation chambers 109. A third groove 132 is disposed on one side of the third housing 13 close to the second housing 12 . The third groove 132 surrounds the outer circumference of each second through hole 131 so that the second housing 12 and the third housing 13 enclose and form the adjustment chamber 103 .

[0050] Specifically, the housing assembly 10 of the present application is composed of a plurality of 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 (ie, Figure 3 and Figure 4 The two housings 102 and 103 are fixedly connected in sequence along the direction indicated by y in the figure. This modular design not only helps to process 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 helps to simplify the assembly process. At the same time, it can also make the structure of the throttling device more compact, because the design of multiple shells helps to reasonably layout the internal structure of the throttling device, so it can save space to a certain extent. The oil replenishing chamber 102 and the pressure stabilizing chamber 101 are respectively formed by the first groove 111 and the second groove 141, which are used to store or transmit hydraulic oil, so that the oil output of the oil outlet channel 105 can be supplemented when the load pressure of the throttling device increases, thereby ensuring the pressure stability of the hydraulic system (such as a hydraulic machine tool, etc.) in which the throttling device is installed.

[0051] Exemplarily, the first shell 11, the second shell 12, the third shell 13 and the fourth shell 14 can be fixed by welding, or by bonding, or by fixing parts (not shown in the figure). This embodiment shows the situation where the first shell 11, the second shell 12, the third shell 13 and the fourth shell 14 are fixed by fixing parts.

[0052] Further, see Figures 1 to 5 As shown, the first shell 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 shell 11, and the first oil outlet section 1051 is communicated with the oil replenishing chamber 102, and the second shell 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 shell 12, the first oil inlet section 1041 and the second oil inlet section 1042 are connected to form an oil inlet channel 104, and the first oil outlet section 1051 and the second oil outlet section 1052 are connected to form an oil outlet channel 105, and the third shell 13 includes an annular groove 133, the annular groove 133 is located at one end of the third shell 13 close to the second shell 12, and the annular groove 133 is arranged around the outer peripheral side of the regulating chamber 103 to form a first flow channel 106, and the oil inlet channel 104 and the oil outlet channel 105 are communicated through the first flow channel 106. The third housing 13 is provided with a conducting hole 134, which extends along the first direction and penetrates the third housing 13 to form a second flow channel 107, and 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 close to 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 are both extended along the first direction and connected to form a single oil inlet channel 104, while the first oil outlet section 1051 and the second oil outlet section 1052 are both extended along the first direction and connected to form a single oil outlet channel 105. Such a 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 the hydraulic oil entering and exiting the throttling device, and can also reduce the possible blockage points in the throttling device and improve 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 another channel to supply oil to the load-bearing device such as the hydraulic slider. Such a design can enhance the connection relationship 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 connected to the first cavity 1091, so that pressure can be continuously provided to the end of the plunger 22 close to the pressure-stabilizing chamber 101, so as to cooperate with the pressure of the plunger 22 close to the oil replenishing chamber 102 to keep the plunger 22 in force balance, so that the size of the flow area between the regulating chamber 103 and the second cavity 1092 can be dynamically adjusted to cope with load pressures of different sizes.

[0054] In addition, the annular groove 133 is arranged around the outer peripheral side of the regulating chamber 103 to form the first flow channel 106, so that the oil inlet channel 104 and the oil outlet channel 105 are connected through this flow channel. In the present application, the cross-sectional shape of the first flow channel 106 cut along the first direction can be rectangular or circular. This embodiment shows the case where the cross-sectional shape of the first flow channel 106 is rectangular. At the same time, in actual manufacturing, the cross-sectional area of ​​the first flow channel 106 is smaller than that of the cross-sectional area of ​​the first flow channel 106 cut along the second direction (i.e. Figure 3 and Figure 4 The first channel 106 (in the direction indicated by x) cuts off the area of ​​the oil inlet channel 104, and because the hydraulic oil has a certain viscosity, the hydraulic oil flowing through the first channel 106 will produce a certain pressure drop, and this pressure drop is the adjustment range of the throttling device of the present application. The present application can reasonably adjust the cross-sectional shape and cross-sectional area of ​​the first channel 106 according to actual needs, so that the adjustment range of the throttling device can be adjusted. Since the present application adopts a multi-plunger 22 for adjustment, the throttling device of the present application is still applicable in hydraulic systems with a larger adjustment range. In addition, the third channel 108 formed by the guide groove 135 connects the oil inlet channel 104 with the regulating chamber 103, so that the regulating chamber 103 can provide hydraulic oil to the replenishing chamber 102 through the regulating chamber 103 at any time as needed, so as to replenish the hydraulic oil in the oil outlet channel 105 at any time when the pressure of the load increases.

[0055] Further, see Figure 1 , Fig. 9 as well as Fig.10 As shown, each second through hole 131 is provided with a throttling step 1311 at one end close to the second shell 12 , and an avoidance gap 1312 is provided between the throttling step 1311 and the second shell 12 , and the regulating cavity 103 is connected with each installation chamber 109 through the avoidance gap 1312 .

[0056] Specifically, along the first direction, the plane where the end of each second through hole 131 close to the second shell 12 is located is higher than the plane where the third shell 13 and the second shell 12 are in contact, so that a throttling step 1311 and an avoidance gap 1312 can be formed between the regulating chamber 103 and each second through hole 131. In the present application, the size of the avoidance gap 1312 can be reasonably adjusted according to actual needs, and cannot be set too large or too small. If the avoidance gap 1312 is set too large, it may cause too much invalid stroke of the plunger 22, thereby causing the response speed of the throttling device to be too slow. If the avoidance gap 1312 is set too small, it may cause the plunger 22 to be unable to effectively adjust the size of the flow area between the regulating chamber 103 and the second cavity 1092.

[0057] Further, see Figures 2 to 5 , Fig. 9 as well as Fig.10As shown, each elastic element 21 includes a first elastic member 211 and a second elastic member 212. Among them, each plunger 22 is movably arranged in each installation chamber 109 and at least partially located in the avoidance gap 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 between the plunger 22 and the first cavity 1091, and 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 between the plunger 22 and the second cavity 1092, and the plunger 22 can reciprocate between the throttling step 1311 and the second housing 12 to adjust the size of the flow area between the regulating cavity 103 and the second cavity 1092.

[0058] Specifically, the first elastic member 211 and the second elastic member 212 are respectively located in different cavities (the first cavity 1091 and the second cavity 1092) and abut against the plunger 22 and the inner wall of the corresponding cavity. This embodiment shows the situation where the first elastic member 211 is located in the first cavity 1091 and the second elastic member 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 oil outlet channel 105 of the throttling device can be controlled. Due to the design of the plunger 22 and the elastic member 21, the throttling device can respond quickly according to the change of the load pressure (that is, quickly adjust the amount of hydraulic oil flowing out of the oil outlet channel 105). When the pressure of the load increases, the pressure of the load will act on the end of the plunger 22 close to the oil replenishing chamber 102 along the oil outlet channel 105, the oil replenishing chamber 102 and the second cavity 1092, thereby pushing the plunger 22 to move along the first direction to increase the flow area of ​​the regulating chamber 103 and the second cavity 1092, thereby increasing the oil output of the oil outlet channel 105. When the pressure of the load decreases, the hydraulic oil in the first cavity 1091 can push the plunger 22 to move along the end close to the oil 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 channel 105. This adaptive mechanism helps to maintain the stable operation of the hydraulic system. When the pressure of the load decreases to zero, the flow area of ​​the regulating chamber 103 and the second cavity 1092 is also reduced to zero. At this time, the second oil circuit inside the throttling device is not conductive. Furthermore, the first elastic member 211 and the second elastic member 212 of the present application may be at least one of a spring, a disc spring and a rubber elastic member. This embodiment shows the case where the first elastic member 211 and the second elastic member 212 are both springs.

[0059] Further, see Figure 3 , Figure 5 , Fig.10 as well as Fig.12As shown, each plunger 22 further includes an annular outer flange 221 , which surrounds the outer circumference of the plunger 22 and protrudes in the radial direction of the plunger 22 , and is located in the avoidance notch 1312 to limit the movement range 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. The annular outer flange 221 is located in the avoidance gap, which effectively limits the movement range of the plunger 22 and ensures that the plunger 22 slides between the throttling step 1311 and the second housing 12. The presence of the annular outer flange 221 can form an additional sealing surface between the plunger 22 and the second housing 12, especially when the plunger 22 is in the extreme position (i.e., the position when the annular outer flange 221 is in contact with the second housing 12). This design helps to reduce the possibility of hydraulic oil leakage and ensure that when the throttling device does not need the second oil circuit for oil replenishment, the hydraulic oil will not leak from the regulating chamber 103 to the oil replenishing chamber 102, thereby allowing the throttling device to play a throttling role. At the same time, the annular outer flange 221 can also serve as a physical barrier to increase the safety of the throttling device. Even under abnormal working conditions, such as when the hydraulic system in which the throttling device is located suddenly produces pressure fluctuations, the annular outer flange 221 can play a certain protective role on the plunger 22, preventing the plunger 22 from sliding out of the movement stroke and causing damage to the internal structure of the throttling device. In addition, the cooperation between the annular outer flange 221 and the avoidance notch 1312 can more accurately control the final position of the plunger 22, which is very important for application scenarios that require high-precision flow regulation. By adjusting the length of the avoidance notch 1312 and the annular outer flange 221 along the first direction, the adjustment accuracy and response speed of the throttling device can be adjusted, thereby ensuring that the hydraulic system in which the throttling device is located can operate efficiently and stably.

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

[0062] Specifically, the design of the convex arc portion 222 enables the throttling device of the present application to control the plunger 22 along the extension direction of the installation chamber 109 (i.e. Figure 3 and Figure 4The size of the flow area between the regulating chamber 103 and the second cavity 1092 can be adjusted by sliding the regulating chamber 103 (in the direction indicated by y in the figure). When the pressure of the load increases, the pressure of the load will act on the end of the plunger 22 close to the oil replenishing chamber 102 along the oil outlet channel 105, the oil replenishing chamber 102 and the second cavity 1092, thereby pushing the plunger 22 to move along the first direction. During this process, the gap between the convex arc portion 222 and the opening of the second cavity 1092 close to the third housing will become larger and larger, thereby increasing the flow area between the regulating chamber 103 and the second cavity 1092, so that the throttling device can supplement 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 , Fig. 9 as well as Fig.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 greater than the radius of the first through hole 121 and the second through hole 131. Specifically, the radius of the first through hole 121 is equal to the radius of the second through hole 131, which can not only ensure the sealing of the installation chamber 109 formed by the second shell 12 and the third shell 13, but also limit the moving range of the plunger 22. If the radius of the first through hole 121 is greater than the radius of the second through hole 131, the plunger 22 may exceed the movement stroke when moving in the direction close to the second shell 12 and slide too far into the second cavity 1092, 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 stuck in the avoidance gap 1312 along the radial direction of the first through hole 121 and the second through hole 131 to ensure that the plunger 22 can move within a 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 close to the end of the first housing 11 is smaller than the radius of each first through hole 121 away from the end of the first housing 11. With such a design, the first through hole 121 close to the end of the first housing 11 can produce a pressure drop effect similar to that of the first flow channel 106. When the pressure of the load is transmitted from the oil replenishing chamber 102 to the plunger 22, since the hydraulic oil has a certain pressure, the pressure of the hydraulic oil will be reduced after the hydraulic oil flows into the first through hole 121 through the end of the first through hole 121 close to the first housing 11, so that the pressure acting on the plunger 22 is not too large, and the plunger 22 can be prevented from being damaged by excessive impact. At the same time, the design that the radius of the first through hole 121 close to the end of the first through hole 121 is smaller than the radius of the first through hole 121 away from the first housing 11 can also cleverly provide a top position for the installation of the elastic element 21, which can simplify the installation of the elastic element 21 to a certain extent. Furthermore, the throttling device of the present application can control the adjustment accuracy of the throttling device not only by controlling the number of installation chambers 109 , but also by adjusting the radius of the first through hole 121 close to one end of the first shell 11 .

[0065] Further, see Figures 1 to 4 , Figures 6 to 10 As shown, the throttling device further 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.

[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 the 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 the 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 the third sealing ring 50. This embodiment shows that 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. The present application provides the first sealing ring 30, the second sealing ring 40 and the third sealing ring 50 in the throttling device, aiming to improve the sealing performance of the throttling device through a multi-layer sealing structure, ensure that the hydraulic oil will not leak out 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 at the same time preventing impurities such as dust in the external environment from entering the interior of the throttling device and contaminating the hydraulic oil.

[0067] From the above statements, it can be known that the present application can at least solve the problem of small adjustment range of the throttling device in heavy equipment with large oil pressure and large adjustment range by designing a throttling device composed of a housing assembly 10, an adjustment assembly 20, a first sealing ring 30, a second sealing ring 40 and a third sealing ring 50. After the hydraulic oil enters the housing assembly 10 from the oil inlet channel 104, it is divided into three oil circuits. Among them, the first oil circuit is that the hydraulic oil enters the first flow channel 106 from the oil inlet channel 104, and then flows directly out to the outside of the housing assembly 10 through the oil outlet channel 105 to provide load support to structures such as hydrostatic sliders or hydrostatic guide rails. The second oil circuit is that the hydraulic oil flows from the oil inlet channel 104 into the second flow channel 107, and enters the pressure stabilizing chamber 101 under the guidance of the second flow channel 107, and then enters the first cavity 1091 to push the plunger 22 to move or balance the force of the plunger 22. In the third oil circuit, the hydraulic oil flows from the oil inlet channel 104 into the third flow channel 108, and then enters the regulating chamber 103. When the flow area of ​​the regulating chamber 103 and the second cavity 1092 is not zero, the hydraulic oil can enter the second cavity 1092 through the regulating chamber 103, and then enter the oil replenishing chamber 102, and finally flow out from the oil outlet channel 105 to the outside of the housing assembly 10 to support the load. In actual operation, the throttling device can change the direction of the resultant force on the plunger 22 by utilizing the pressure difference change between the first cavity 1091 and the second cavity 1092 caused by the change of the load and the change of the resultant force of the two elastic members (i.e., the first elastic member 211 and the second elastic member 212), thereby pushing the plunger 22 to reciprocate along the first direction to adjust the gap size between the convex arc portion 222 and the opening of the second cavity 1092 close to the third shell, thereby playing the role of adjusting the flow area size of the regulating chamber 103 and the second cavity 1092.

[0068] It can be seen that compared with the existing throttling device using a single plunger 22, the throttling device of the present application uses multiple plungers 22 to adjust the size of the flow area between the regulating chamber 103 and the second cavity 1092, so that the hydraulic oil pressure inside the throttling device can be dispersed to multiple plungers 22 for adjustment, so that the hydraulic oil pressure on each plunger 22 is smaller, so it is not easy to be damaged. And because the throttling device uses multiple adjustment components 20 for adjustment, when one or more of the adjustment components 20 cannot work, the throttling device can still work, so the throttling device of the present application is also more reliable.

[0069] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. 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 figure. For example, if the device in the accompanying 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.

[0070] 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. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0071] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A throttling device, characterized in that: include: A housing component (10), wherein a pressure stabilizing chamber (101), an oil replenishing chamber (102), a regulating 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) are arranged in the housing component (10), wherein the oil inlet channel (104) and the oil outlet channel (105) are connected via the first flow channel (106), and the oil inlet channel (104) and the third flow channel (108) are connected via the first flow channel (106). The pressure stabilizing chamber (101) is in communication with the second flow channel (107), the pressure stabilizing chamber (101) and the oil replenishing chamber (102) are in communication with each other through a plurality of installation chambers (109), the oil replenishing chamber (102) is in communication with the oil outlet channel (105), the regulating chamber (103) surrounds the outer peripheral side of the installation chamber (109), and the regulating chamber (103) is in communication with the oil inlet channel (104) through the third flow channel (108); An adjusting component (20), wherein there are a plurality of adjusting components (20), and the plurality of adjusting components (20) are arranged in a one-to-one correspondence in the plurality of installation chambers (109), wherein the adjusting component (20) comprises an elastic element (21) and a plunger (22), wherein the plunger (22) separates the installation chamber (109) into a first cavity (1091) and a second cavity (1092), wherein the first cavity (1091) is connected to the pressure stabilizing chamber (101), and the The second cavity (1092) is connected to 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 cavity (109) to adjust the size of the flow area between the regulating cavity (103) and the second cavity (1092); the elastic element (21) can expand and contract along the extension direction of the mounting cavity (109) and abut against the plunger (22) and the inner wall of the mounting cavity (109).

2. The throttling device according to claim 1, characterized in that: The housing assembly (10) comprises a first housing (11), a second housing (12), a third housing (13) and a fourth housing (14); The first shell (11), the second shell (12), the third shell (13) and the fourth shell (14) are fixedly connected in sequence along a first direction; a first groove (111) is provided on a side of the first shell (11) close to the second shell (12) so that the first shell (11) and the second shell (12) are surrounded by the oil replenishing chamber (102); a second groove (141) is provided on a side of the fourth shell (14) close to the third shell (13) so that the fourth shell (14) and the third shell (13) are surrounded by the pressure stabilizing chamber (101); ) is provided with a plurality of first through holes (121) extending in a direction away from the third shell (13) and penetrating the second shell (12); the third shell (13) is provided with a plurality of second through holes (131) extending in a direction away from the second shell (12) and penetrating the third shell (13); each of the first through holes (121) and each of the second through holes (131) are arranged in a one-to-one correspondence so that the second shell (12) and the third shell (13) are surrounded to form a plurality of the installation chambers (109); the oil replenishing chamber (102) and the pressure stabilizing chamber (101) are connected via the plurality of the installation chambers (109); A third groove (132) is provided on one side of the third shell (13) close to the second shell (12), and the third groove (132) surrounds the outer circumference of each second through hole (131) so that the second shell (12) and the third shell (13) are surrounded to form the adjustment chamber (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) is communicated with the oil replenishing 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), and the first oil inlet section (1041) and the second oil inlet section (1042) are connected to form the oil inlet passage (102). 04), the first oil outlet section (1051) and the second oil outlet section (1052) are connected to form the oil outlet passage (105), the third housing (13) comprises an annular groove (133), the annular groove (133) is located at one end of the third housing (13) close to the second housing (12), and the annular groove (133) is arranged around the outer peripheral side of the regulating chamber (103) to form the first flow passage (106), and the oil inlet passage (104) and the oil outlet passage (105) are connected through the first flow passage (106); The third housing (13) is provided with a conducting hole (134), the conducting hole (134) extending along the first direction and penetrating the third housing (13) to form the second flow channel (107), the oil inlet channel (104) and the pressure stabilizing chamber (101) being connected via the second flow channel (107); The third shell (13) is provided with a guide groove (135), and the guide groove (135) is located at one end of the third shell (13) close to the second shell (12) to form the 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).

4. The throttling device according to claim 2, characterized in that: A throttling step (1311) is provided at one end of each second through hole (131) close to the second shell (12), and an avoidance gap (1312) is provided between the throttling step (1311) and the second shell (12), and the regulating chamber (103) is connected to each installation chamber (109) through the avoidance gap (1312).

5. The throttling device according to claim 4, characterized in that: Each of the elastic elements (21) comprises a first elastic member (211) and a second elastic member (212); Wherein, each of the plungers (22) is movably arranged in each of the installation chambers (109) and is at least partially located in the avoidance gap (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 between 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 between the plunger (22) and the second cavity (1092); the plunger (22) can slide back and forth between the throttling step (1311) and the second shell (12) to adjust the size of the flow area between 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 comprises an annular outer flange (221), which surrounds the outer peripheral side of the plunger (22) and protrudes in the radial direction of the plunger (22), and the annular outer flange (221) is located in the avoidance notch (1312) to limit the movement range of the plunger (22).

7. The throttling device according to claim 5, characterized in that: Each of the plungers (22) further comprises a convex arc portion (222), wherein the convex arc portion (222) is located at one end of the plunger (22) close to the second cavity (1092), and the center of the convex arc portion (222) is located on a side of the plunger (22) close to the first cavity (1091), and the convex arc portion (222) is at least used to adjust the size of the flow area between the regulating 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 radius 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 one end of each of the first through holes (121) close to the first shell (11) is smaller than the radius of one end of each of the first through holes (121) away from the first shell (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 arranged between the first shell (11) and the second shell (12) and extends along the outer circumference of the first shell (11); the second sealing ring is located between the second shell (12) and the third shell (13) and extends along the outer circumference of the second shell (12); and the third sealing ring is located between the third shell (13) and the fourth shell (14) and extends along the outer circumference of the third shell (13).

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