Throttling device and hydraulic system
By using a plunger sliding structure to control the flow gap in the throttling device, the problems of easy fatigue deformation and high cost of diaphragm sheets are solved, achieving higher adjustment accuracy and longer service life.
Patent Information
- Application Number
- CN202423310636.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In existing throttling devices, the diaphragm sheet is prone to fatigue deformation and has high processing costs, which affects the regulation accuracy and stability.
A structure that uses a plunger to control the flow gap replaces the diaphragm for flow regulation. The flow area of the regulating orifice is adjusted by the plunger sliding under the action of hydraulic oil.
It improves the adjustment accuracy and service life of the throttling device, reduces production costs, and is less prone to damage due to high pressure deformation.
Smart Images
Figure CN223781784U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to hydraulic throttling equipment technical field, specifically, relate to a throttling device and hydraulic system. BACKGROUND
[0002] The throttling device is a commonly used liquid static pressure flow control device, which is widely used in various hydraulic systems because it can adjust the flow in the hydraulic system. The existing throttling device generally uses a diaphragm to control the hydraulic oil flow of the throttling device. By adjusting the position of the diaphragm, the conduction area of the hydraulic oil flow passage in the throttling device is changed to control the hydraulic oil flow rate out of the throttling device. Because the diaphragm is in high-pressure hydraulic oil for a long time, and the diaphragm needs to be repeatedly deformed by extrusion stress to control the flow gap during work, the diaphragm is prone to fatigue deformation over a long period of time. The deformation of the diaphragm will change the stress distribution of the diaphragm, causing the adjustment range of the throttling device to change, thereby affecting the adjustment accuracy and stability of the throttling device. Therefore, in order to prevent the diaphragm from being prone to fatigue deformation during use, the diaphragm is usually strengthened by heat treatment or stress technology on the surface of the diaphragm to improve the service life of the diaphragm. However, this method can improve the service life of the diaphragm to some extent, but it also increases the manufacturing cost and maintenance cost of the throttling device.
[0003] Moreover, the machining precision of the diaphragm throttling device is a key factor affecting the performance of the throttling device itself and the running effect of the entire hydraulic system, so the diaphragm throttling device has high requirements for machining precision, which will increase production cost to some extent and is not conducive to the production and manufacturing of the throttling device. Therefore, the structure of the plunger sliding control flow gap is used to replace the structure of the diaphragm extrusion deformation control flow gap, and compared with the prior art, the throttling device of the present scheme has the effects of absorbing machining error and effectively saving machining cost. SUMMARY
[0004] The main purpose of the utility model is to provide a throttling device and a hydraulic system, which at least solve the problems of fatigue deformation of the diaphragm of the throttling device and high machining cost.
[0005] According to one aspect of the utility model, a throttling device is provided, which comprises:
[0006] The housing assembly comprises a first housing, a second housing and a third housing.
[0007] The adjusting assembly comprises an elastic element and a plunger.
[0008] The first housing and the third housing are respectively fixed to opposite ends of the second housing, and the first housing and the second housing form an oil replenishment cavity. The first housing, the second housing and the third housing form a cavity. The oil replenishment cavity surrounds the outer periphery of the cavity along the circumferential direction of the cavity, and the oil replenishment cavity is connected to the cavity through an adjustment hole.
[0009] The first housing is provided with an oil inlet channel, an oil outlet channel, and an oil replenishment channel. The oil inlet channel and the oil replenishment channel both extend along a first direction. The oil outlet channel extends from one end away from the first housing to one end closer to the first housing to penetrate the first housing. The first housing is provided with a first flow channel and a second flow channel at one end closer to the second housing. The oil inlet channel and the oil outlet channel are connected through the first flow channel. The oil inlet channel and the oil replenishment chamber are connected through the second flow channel. The oil replenishment channel is connected to the cavity.
[0010] The second housing is provided with a third flow channel that penetrates the second housing along the first direction, and a guiding flow channel is provided at one end of the third housing near the second housing. One end of the third flow channel is connected to the oil inlet channel, and the other end of the third flow channel is connected to the cavity through the guiding flow channel.
[0011] The plunger is movably disposed in the cavity, the elastic element extends and retracts along the first direction and abuts against the plunger and the inner wall of the cavity, and the plunger can slide back and forth along the first direction to adjust the flow area of the adjustment orifice.
[0012] Furthermore, the first housing includes a first annular protrusion, the third housing includes a second annular protrusion, and the second housing includes a through-hole section;
[0013] The first annular protrusion is disposed on the side of the first housing near the second housing, and the second annular protrusion is disposed on the side of the third housing near the second housing;
[0014] The through-hole section penetrates the second housing along the first direction, and the first annular protrusion is inserted at one end of the through-hole section. The second annular protrusion is inserted at the other end of the through-hole section and abuts against the first annular protrusion to form the cavity. The plunger is movably disposed in the cavity and divides the cavity into a pressure stabilizing chamber and a first chamber. The pressure stabilizing chamber is closer to the third housing than the first chamber. The oil replenishment channel communicates with the first chamber, and the pressure stabilizing chamber communicates with the flow channel.
[0015] Furthermore, the inner wall of the first chamber is provided with a first limiting step, and the second annular protrusion protrudes at least partially from the inner side of the first annular protrusion to form a second limiting step, and the plunger is slidably disposed between the first limiting step and the second limiting step.
[0016] Furthermore, the adjustment hole is disposed on the first annular protrusion and extends in the radial direction of the first annular protrusion, and the adjustment hole is located between the first limiting step and the second limiting step and is close to the first limiting step.
[0017] Furthermore, a first annular groove is provided on the side of the first housing near the second housing, and the through-hole section includes a first through-hole section and a second through-hole section;
[0018] Wherein, the first annular groove surrounds the outer periphery of the first annular protrusion;
[0019] The first through-hole section is closer to the first housing than the second through-hole section, and the radius of the first through-hole section is greater than the outer diameter of the first annular protrusion. The radius of the second through-hole section is equal to the outer diameters of the second annular protrusion and the first annular protrusion. The first annular protrusion is at least partially inserted into the second through-hole section. The first annular groove and the first through-hole section cooperate to form the oil replenishment cavity.
[0020] Furthermore, the end of the oil replenishment channel away from the second housing and the end of the oil outlet channel away from the second housing are connected.
[0021] Furthermore, the elastic element includes a first elastic member and a second elastic member;
[0022] Wherein, one of the first elastic element and the second elastic element abuts against the plunger and the first housing, and the other of the first elastic element and the second elastic element abuts against the plunger and the third housing.
[0023] Furthermore, both the first elastic element and the second elastic element include at least one of a spring, a disc spring, and a rubber elastic element.
[0024] Furthermore, the throttling device also includes a first sealing ring, a second sealing ring, and a third sealing ring;
[0025] The first sealing ring is disposed on the side of the first housing away from the second housing and extends along the outer periphery of the first housing; the second sealing ring is located between the first housing and the second housing and extends along the outer periphery of the first housing; and the third sealing ring is disposed between the second housing and the third housing and extends along the outer periphery of the second housing.
[0026] On the other hand, this application also mentions a hydraulic system that includes the aforementioned throttling device.
[0027] In this invention, a plunger is provided in the cavity of the throttling device, which can reciprocate along a first direction to adjust the flow area of the regulating orifice. This allows the throttling device of this application to solve the problems of fatigue deformation of the diaphragm and high processing cost. In actual operation, the hydraulic oil enters the housing assembly from the inlet channel and is divided into three oil paths. In the first oil path, a portion of the hydraulic oil flows from the first flow channel into the outlet channel after entering the housing assembly, and then flows directly out of the outlet channel to the outside of the housing assembly to support the load. In the second oil path, the hydraulic oil enters the housing assembly from the inlet channel and then flows from the second flow channel into the replenishing chamber. After filling the replenishing chamber to a certain extent, the hydraulic oil in the replenishing chamber can flow from the regulating orifice into the side of the cavity near the replenishing channel, and finally flows out of the replenishing channel to the outside of the housing assembly to support the load. The third oil circuit involves hydraulic oil entering the housing assembly from the inlet channel and then flowing into the guide channel from the third flow channel. Since the guide channel is connected to the side of the cavity near the replenishment channel, the hydraulic oil in the guide channel will eventually enter the side of the cavity near the replenishment channel, thereby pushing the plunger to slide back and forth in the first direction to adjust the flow area of the adjustment hole (i.e., the actual opening area that hydraulic oil is allowed to flow through after the adjustment hole is blocked by the plunger), and thus adjust the amount of hydraulic oil in the replenishment channel.
[0028] It should be noted that when the load pressure on the throttling device is zero, the plunger, driven by the hydraulic oil, completely closes the regulating orifice. At this time, the flow area of the regulating orifice is zero, and the throttling device does not need to supply hydraulic oil to the load through the replenishment channel. When the load pressure on the throttling device is not zero, as the load pressure increases, the load pressure acts on the plunger along with the hydraulic oil in the replenishment channel, pushing the plunger to move along the side closer to the third housing to open the regulating orifice. The flow area of the regulating orifice increases with the increase of the load pressure. When the regulating orifice is fully opened, the throttling device supplies hydraulic oil to the load through the outlet and replenishment channels to support the load. Attached Figure Description
[0029] The accompanying drawings, which are included to provide a further understanding of the present invention and constitute a part of this invention, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:
[0030] Figure 1 An exploded view of the throttling device disclosed in an embodiment of this utility model from a first-view perspective;
[0031] Figure 2 This is an exploded view of the throttling device disclosed in an embodiment of the present utility model from a second perspective.
[0032] Figure 3 This is a cross-sectional view of the throttling device disclosed in an embodiment of the present utility model from a third perspective;
[0033] Figure 4 for Figure 3 An enlarged view of part A in the image;
[0034] Figure 5 This is a cross-sectional view of the throttling device disclosed in an embodiment of the present utility model from an exploded perspective;
[0035] Figure 6 This is a structural diagram of the first housing disclosed in an embodiment of the present utility model;
[0036] Figure 7 This is a structural diagram of the second housing disclosed in an embodiment of the present utility model;
[0037] Figure 8 This is a structural diagram of the third housing disclosed in an embodiment of the present utility model.
[0038] The above figures include the following reference numerals:
[0039] 10. Housing assembly; 11. First housing; 111. Oil inlet channel; 112. Oil outlet channel; 113. Oil replenishment channel; z. First direction; 114. First flow channel; 115. Second flow channel; 116. First annular protrusion; 1161. First limiting step; 1162. Adjustment hole; 117. First annular groove; 118. First sealing groove; 119. Second sealing groove; 12. Second housing; 121. Third flow channel; 122. Through hole section; 1221. First through hole section; 1222, Second through hole section; 123, Third sealing groove; 13, Third housing; 131, Flow channel; 132, Second annular protrusion; 1321, Second limiting step; 14, Oil replenishment chamber; 15, Cavity; 151, Pressure stabilizing chamber; 152, First chamber; 16, Fixing hole; 20, Adjustment assembly; 21, Elastic element; 211, First elastic element; 212, Second elastic element; 22, Plunger; 30, First sealing ring; 40, Second sealing ring; 50, Third sealing ring. Detailed Implementation
[0040] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model 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 exemplary embodiments according to the present 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 described in these embodiments do not limit the scope of this 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 drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0043] To address the problems of fatigue deformation and high processing costs associated with throttling devices, 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 8 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 first housing 11, a second housing 12, and a third housing 13. The adjustment assembly 20 includes an elastic element 21 and a plunger 22. The first housing 11 and the third housing 13 are respectively fixed to opposite ends of the second housing 12, and the first housing 11 and the second housing 12 form an oil replenishment chamber 14. The first housing 11, the second housing 12, and the third housing 13 form a cavity 15. The oil replenishment chamber 14 surrounds the outer periphery of the cavity 15 along the circumferential direction, and the oil replenishment chamber 14 is connected to the cavity 15 through an adjustment hole 1162. The first housing 11 is provided with an oil inlet channel 111, an oil outlet channel 112, and an oil replenishment channel 113. The oil inlet channel 111 and the oil replenishment channel 113 both extend along a first direction. The oil outlet channel 112 extends from the end away from the first housing 11 to the end closer to the first housing 11 to penetrate the first housing 11. The first housing 11 is provided with a first flow channel 114 and a second flow channel 115 at the end closer to the second housing 12. The oil inlet channel 111 and the oil outlet channel 112 are connected through the first flow channel 114. The oil inlet channel 111 and the oil replenishment chamber 14 are connected through the second flow channel 115. The oil replenishment channel 113 is connected to the cavity 15. The second housing 12 is provided with a third flow channel 121 that penetrates the second housing 12 along the first direction. The third housing 13 is provided with a connecting flow channel 131 at the end closer to the second housing 12. One end of the third flow channel 121 is connected to the oil inlet channel 111, and the other end of the third flow channel 121 is connected to the cavity 15 through the connecting flow channel 131. The plunger 22 is movably disposed in the cavity 15. The elastic element 21 extends and retracts along the first direction and abuts against the plunger 22 and the inner wall of the cavity 15. The plunger 22 can slide back and forth along the first direction to adjust the size of the flow area of the adjustment hole 1162.
[0046] In this application, the cavity 15 of the throttling device is provided with a flow path that can travel along a first direction (i.e. Figure 3The plunger 22 (in the direction indicated by z) slides back and forth to adjust the flow area of the regulating orifice 1162. By using the plunger 22 to replace the diaphragm, the throttling device of this application can solve the problems of fatigue deformation and high processing cost of the diaphragm in the throttling device. In actual operation, the hydraulic oil enters the housing assembly 10 from the oil inlet channel 111 and is divided into three oil circuits. In the first oil circuit, after the hydraulic oil enters the housing assembly 10 from the oil inlet channel 111, a part of the hydraulic oil flows from the first flow channel 114 into the oil outlet channel 112, and then flows directly from the oil outlet channel 112 to the outside of the housing assembly 10 to support the load. The second oil circuit is where hydraulic oil enters the housing assembly 10 through the inlet channel 111, and then enters the replenishing chamber 14 through the second flow channel 115. After filling the replenishing chamber 14 to a certain extent, the hydraulic oil in the replenishing chamber 14 can flow from the adjustment hole 1162 into the side of the cavity 15 near the replenishing channel 113, and finally flows out from the replenishing channel 113 to the outside of the housing assembly 10 to support the load. The third oil circuit involves hydraulic oil entering the housing assembly 10 from the inlet channel 111, and then flowing into the guide channel 131 from the third flow channel 121. Since the guide channel 131 is connected to the side of the cavity 15 near the replenishment channel 113, the hydraulic oil in the guide channel 131 will eventually enter the side of the cavity 15 near the replenishment channel 113, thereby pushing the plunger 22 to slide back and forth in the first direction to adjust the flow area of the adjustment hole 1162 (i.e., the actual opening area of the adjustment hole 1162 that allows hydraulic oil to flow through after being blocked by the plunger 22), thereby adjusting the amount of hydraulic oil in the replenishment channel 113.
[0047] It should be noted that when the load pressure on the throttling device is zero, the plunger 22 is pushed by the hydraulic oil on the side of the cavity 15 near the third housing 13, and its lower edge is in contact with... Figure 3 The flow path moves in the opposite direction to the direction indicated by z, thus completely closing the regulating hole 1162. At this time, the flow area of the regulating hole 1162 is zero, and the throttling device does not need to supply hydraulic oil to the load through the oil replenishment channel 113. When the load pressure on the throttling device is not zero, as the load pressure increases, the load pressure will act on the end of the plunger 22 near the first housing 11 along with the hydraulic oil in the oil replenishment channel 113, and then push the plunger along the side near the third housing (i.e., along...). Figure 3 The flow path of the regulating orifice 1162 is moved in the direction indicated by z to open the regulating orifice 1162. During this process, the flow area of the regulating orifice 1162 increases with the increase of the load pressure. When the regulating orifice 1162 is fully opened, the throttling device supplies hydraulic oil to the load through the oil outlet channel 112 and the oil replenishment channel 113 to support the load.
[0048] In other words, compared to existing throttling devices that use diaphragms, the throttling device of this application uses a plunger 22 to adjust the flow area of the regulating orifice 1162. Compared to diaphragms, the plunger 22 of this application is less prone to fatigue deformation and has a simpler manufacturing process, which can save production costs to a certain extent. Furthermore, the movement of the plunger 22 is related to the load pressure, thus the throttling device of this application has higher adjustment accuracy. Moreover, since the plunger 22 is less prone to deformation or damage under high hydraulic pressure, the throttling device of this application has a longer service life.
[0049] Exemplarily, the first housing 11 and the third housing 13 can be fixed to opposite ends of the second housing 12 by welding, by adhesive bonding, or by fasteners (not shown in the figure). This embodiment shows the case where the first housing 11 and the third housing 13 are fixed to opposite ends of the second housing 12 by fasteners. In this embodiment, the first housing 11, the second housing 12, and the third housing 13 are each provided with four fixing holes 16 that penetrate through the first housing 11, the second housing 12, and the third housing 13 along a first direction, and the fixing holes 16 of the first housing 11, the second housing 12, and the third housing 13 correspond one-to-one. In actual installation, after the operator assembles the first housing 11, the second housing 12, and the third housing 13 in their respective positions, four fasteners are used to pass through the four sets of fixing holes 16 to fix the first housing 11, the second housing 12, and the third housing 13 together.
[0050] Further, see Figures 1 to 4 , Figure 6 as well as Figure 8 As shown, the first housing 11 includes a first annular protrusion 116, the third housing 13 includes a second annular protrusion 132, and the second housing 12 includes a through-hole section 122. The first annular protrusion 116 is located on the side of the first housing 11 near the second housing 12, and the second annular protrusion 132 is located on the side of the third housing 13 near the second housing 12. The through-hole section 122 extends through the second housing 12 along a first direction, with the first annular protrusion 116 inserted at one end of the through-hole section 122 and the second annular protrusion 132 inserted at the other end of the through-hole section 122, abutting against the first annular protrusion 116 and forming a cavity 15. A plunger 22 is movably disposed in the cavity 15 and divides the cavity 15 into a pressure-stabilizing cavity 151 and a first chamber 152. The pressure-stabilizing cavity 151 is closer to the third housing 13 than the first chamber 152. The oil replenishment channel 113 communicates with the first chamber 152, and the pressure-stabilizing cavity 151 communicates with the flow channel 131.
[0051] Specifically, the first annular protrusion 116 and the second annular protrusion 132 are respectively inserted into the two ends of the through-hole section 122 and abut against each other to form a closed cavity 15. This design prevents the hydraulic oil inside the throttling device from leaking into the external environment, and also prevents dust and other impurities from the external environment from entering the throttling device and affecting its operation. The plunger 22 not only divides the cavity 15 into a pressure-stabilizing chamber 151 and a first chamber 152, but also, because the plunger 22 can move within the cavity 15, it can change the volume ratio of the pressure-stabilizing chamber 151 and the first chamber 152. This allows the throttling device to adjust the internal pressure distribution to respond according to different operating conditions. Furthermore, the pressure-stabilizing chamber 151 is connected to the third flow channel 121 through the connecting flow channel 131, which can be used to maintain the pressure in the pressure-stabilizing chamber 151 at a specific pressure level, thereby ensuring the stability of the throttling device. The first chamber 152 is connected via the oil replenishment channel 113, enabling the supply of hydraulic oil to the load, thus allowing the throttling device of this application to adapt to different working conditions. Due to the presence of the plunger 22, when external conditions (such as ambient temperature and load pressure) change, the plunger 22 experiences pressure changes from the oil replenishment channel 113, allowing it to move along the first direction to automatically adjust the fluid distribution within the pressure stabilizing chamber 151 and the first chamber 152, achieving dynamic balancing or compensation. In this application, the oil replenishment channel 113 can transmit load pressure to the first chamber 152 or supply hydraulic oil to the load, thereby indirectly controlling the hydraulic oil flow in hydraulic systems (such as hydraulic machine tools, presses, and excavators), which is crucial for systems requiring precise flow control. Compared to existing throttling devices, the throttling device of this application has higher efficiency and reliability.
[0052] Further, see Figure 3 and Figure 4 As shown, the inner wall of the first chamber 152 is provided with a first limiting step 1161, and the second annular protrusion 132 protrudes at least partially from the inner side of the first annular protrusion 116 to form a second limiting step 1321. The plunger 22 is slidably disposed between the first limiting step 1161 and the second limiting step 1321.
[0053] Specifically, the throttling device of this application cleverly designs the inner wall structure of the first chamber 152 and the structure of the second annular protrusion 132, thereby forming a first limiting step 1161 and a second limiting step 1321. Through the combined action of the first limiting step 1161 and the second limiting step 1321, it is ensured that the plunger 22 can only slide within the cavity 15 between them, thus avoiding mechanical failures or damage that may be caused by excessive movement of the plunger 22. The presence of the first limiting step 1161 and the second limiting step 1321 can reduce the displacement of the plunger 22 in the first direction (i.e., Figure 3The unnecessary displacement in the direction indicated by z in this application allows the throttling device to react quickly during operation, increasing the stability and reliability of the system. This design is particularly important when operating in high vibration or shock environments. Furthermore, because the movement range of the plunger 22 is strictly limited, the throttling device can achieve more precise pressure control within the set range, thereby improving the response accuracy of the entire hydraulic system. Moreover, the limiting step not only restricts the movement range of the plunger 22 but also acts as a physical barrier, protecting other components inside the throttling device (such as the first elastic element 211 and the second elastic element 212 mentioned below) from accidental damage. In other words, the design of the first limiting step 1161 and the second limiting step 1321 not only significantly improves the stability and controllability of the hydraulic system but also provides better support for the application of the throttling device in various scenarios, enhances the safety and durability of the throttling device, and thus increases its service life.
[0054] Further, see Figures 3 to 6 As shown, the adjustment hole 1162 is disposed on the first annular protrusion 116 and extends in the radial direction of the first annular protrusion 116, and the adjustment hole 1162 is located between the first limiting step 1161 and the second limiting step 1321 and close to the first limiting step 1161.
[0055] Specifically, the adjusting hole 1162 is located between the first limiting step 1161 and the second limiting step 1321. This allows the peripheral side of the plunger 22, which is in contact with the inner wall of the cavity 15, to block or open the adjusting hole 1162 when the plunger 22 moves within the range defined by the first limiting step 1161 and the second limiting step 1321. This allows control over the size of the opening of the adjusting hole 1162 to the first cavity 152 (i.e., the size of the flow area of the adjusting hole 1162), and the size of this opening is directly related to the size of the flow area of the adjusting hole 1162. Therefore, the throttling device of this application can control the flow rate of hydraulic oil supplied to the load through the oil replenishment channel 113 by controlling the size of the flow area of the adjusting hole 1162. Furthermore, the reason why the adjusting hole 1162 is located inside the cavity 15 near the first limiting step 1161 is that this arrangement can improve the sensitivity of the throttling device to a certain extent, so that the throttling device can respond quickly to changes in the load pressure it bears, thereby adjusting the hydraulic oil flow supplied to the load. If the adjusting hole 1162 is located inside the cavity 15 away from the first limiting step 1161, it will not only increase the ineffective stroke of the plunger 22, but also reduce the response speed of the throttling device. Therefore, this application sets the adjusting hole 1162 inside the cavity 15 near the first limiting step 1161.
[0056] Further, see Figures 3 to 8 As shown, a first annular groove 117 is provided on the side of the first housing 11 near the second housing 12, and a through-hole section 122 includes a first through-hole section 1221 and a second through-hole section 1222. The first annular groove 117 surrounds the outer periphery of the first annular protrusion 116. The first through-hole section 1221 is closer to the first housing 11 than the second through-hole section 1222, and the radius of the first through-hole section 1221 is larger than the outer diameter of the first annular protrusion 116. The radius of the second through-hole section 1222 is equal to the outer diameters of the second annular protrusion 132 and the first annular protrusion 116, and the first annular protrusion 116 is at least partially inserted into the second through-hole section 1222. The first annular groove 117 and the first through-hole section 1221 cooperate to form an oil replenishment cavity 14.
[0057] Specifically, in this application, the radius of the first through-hole section 1221 is larger than the outer diameter of the first annular protrusion 116. This allows the throttling device to form a replenishing chamber 14 for storing hydraulic oil through the cooperation of the first annular groove 117 and the first through-hole section 1221. This design allows the throttling device to guide the hydraulic oil in the replenishing chamber 14 to the first chamber 152 through the adjusting hole 1162 when the load pressure increases. Subsequently, the hydraulic oil can be supplied to devices such as the hydraulic slider through the replenishing channel 113 to support the load. Furthermore, the first annular protrusion 116 is at least partially inserted into the second through-hole section 1222. This design facilitates precise positioning and alignment between the first housing 11 and the second housing 12, ensuring assembly accuracy and making the connection between the first housing 11 and the second housing 12 more stable. Since the radius of the second through hole section 1222 is equal to the outer diameter of the second annular protrusion 132 and the first annular protrusion 116, this not only ensures that the first annular protrusion 116 and the second annular protrusion 132 can be precisely aligned and installed, but also ensures that the structure of the cavity 15 formed after the first annular protrusion 116 and the second annular protrusion 132 are matched is more stable. At the same time, it can also enhance the sealing of the cavity 15 and ensure that the hydraulic oil will not leak from the connection of the inner wall of the cavity 15 to the outside of the throttling device.
[0058] Further, see Figure 3 and Figure 8 As shown, the end of the oil replenishment channel 113 away from the second housing 12 and the end of the oil outlet channel 112 away from the second housing 12 are connected. Specifically, the reason why the end of the oil replenishment channel 113 away from the second housing 12 and the end of the oil outlet channel 112 away from the second housing 12 are connected is to speed up the response speed of the throttling device. This arrangement ensures that the first oil circuit, the second oil circuit, and the third oil circuit inside the throttling device can form a closed-loop or semi-closed-loop flow path. Thus, when the load pressure changes, the throttling device can respond quickly to provide hydraulic oil to the load through the oil replenishment channel 113.
[0059] Further, see Figures 1 to 5 As shown, the elastic element 21 includes a first elastic element 211 and a second elastic element 212. One of the first elastic element 211 and the second elastic element 212 abuts against the plunger 22 and the first housing 11, while the other of the first elastic element 211 and the second elastic element 212 abuts against the plunger 22 and the third housing 13.
[0060] Specifically, this application provides support for the plunger 22 in two directions by respectively arranging the first elastic element 211 and the second elastic element 212 on opposite sides of the plunger 22, ensuring that the plunger 22 can operate stably within a preset range. Simultaneously, the elastic element 21 also has a buffering and shock-absorbing function. When the load pressure changes drastically, the plunger 22 experiences significant impact or vibration. In this case, the elastic element 21 can absorb energy, reducing the vibration transmitted to the first housing 11 and the third housing 13, protecting the internal components of the throttling device from damage. By utilizing the elasticity and compressibility of the elastic element 21, this application allows for fine adjustments to the position of the plunger 22. This helps achieve higher precision requirements during assembly. Furthermore, the first elastic element 211 and the second elastic element 212 also ensure the position of the plunger 22 within the cavity 15, preventing excessive movement of the plunger 22 within the cavity 15 when hydraulic oil is not supplied, thus preventing wear on the cavity 15 or the plunger 22.
[0061] Further, see Figures 1 to 5 As shown, both the first elastic element 211 and the second elastic element 212 include at least one of a spring, a disc spring, and a rubber elastic element.
[0062] Exemplary examples show that the first elastic element 211 and the second elastic element 212 in this application can be springs, disc springs, or rubber elastic elements, etc. This embodiment illustrates the case where both the first elastic element 211 and the second elastic element 212 are disc springs. Disc springs typically have high stiffness, making them suitable for applications requiring high load pressure. Furthermore, disc springs have the advantage of high pressure resistance, making them less prone to damage under the high pressure of hydraulic oil. Moreover, disc springs are used in this embodiment because, compared to other springs, they can provide greater elastic force in a smaller space, making them particularly suitable for applications with limited space but requiring strong support. Additionally, disc springs are easier to manufacture into smaller structures, allowing them to be used in more compact throttling devices, thus reducing the size of the throttling device and saving costs.
[0063] Further, see Figures 1 to 3 , Figure 5As shown, the throttling device also includes a first sealing ring 30, a second sealing ring 40, and a third sealing ring 50. The first sealing ring 30 is disposed on the side of the first housing 11 away from the second housing 12 and extends along the outer periphery of the first housing 11. The second sealing ring 40 is located between the first housing 11 and the second housing 12 and extends along the outer periphery of the first housing 11. The third sealing ring 50 is disposed between the second housing 12 and the third housing 13 and extends along the outer periphery of the second housing 12.
[0064] Specifically, a first sealing groove 118 is provided on the side of the first housing 11 away from the second housing 12 and near the outer periphery of the first housing 11 for mounting a first sealing ring 30. A second sealing groove 119 is provided on at least one of the first housing 11 and the second housing 12 for mounting a second sealing ring 40, and the second sealing groove 119 is located on at least one of the two opposite surfaces of the first housing 11 and the second housing 12. This embodiment shows the case where the second sealing groove 119 is provided on the first housing 11. A third sealing groove 123 is provided on at least one of the second housing 12 and the third housing 13 for mounting a third sealing ring 50, and the third sealing groove 123 is located between the second housing 12 and the third housing 13. This embodiment shows the case where the third sealing groove 123 is provided on the second housing 12. This application incorporates a second sealing ring 40 and a third sealing ring 50 in the throttling device. The aim is to improve the sealing performance of the throttling device through a multi-layered sealing structure, ensuring that hydraulic oil does not leak from the gaps between the first housing 11, the second housing 12, and the third housing 13. It also prevents dust and other impurities from the external environment from entering the throttling device and contaminating the hydraulic oil. The first sealing ring 30 not only ensures that hydraulic oil does not leak from the gap between the throttling device and the hydraulic machine tool to the external environment after the throttling device is installed on a structure such as a hydraulic machine tool (not shown in the figure), but also prevents dust and other impurities from the external environment from entering the hydraulic oil circuit of the hydraulic machine tool and contaminating the hydraulic oil.
[0065] On the other hand, this application also mentions a hydraulic system that includes the aforementioned throttling device. The hydraulic system of this application can be, for example, a CNC lathe, CNC milling machine, high-precision machine tool, excavator, and bulldozer. Because the throttling device of this application has advantages such as higher adjustment accuracy and longer lifespan, applying the throttling device to a hydraulic system can improve the performance and working efficiency of the hydraulic system.
[0066] 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 problems of fatigue deformation of the diaphragm sheet and high processing costs in throttling devices. Hydraulic oil enters the housing assembly 10 through the inlet channel 111 and is divided into three oil paths. The first oil path involves hydraulic oil flowing from the inlet channel 111 into the first flow channel 114, and then directly out through the outlet channel 112 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 111 into the second flow channel 115, and then into the replenishment chamber 14. Subsequently, the hydraulic oil in the replenishment chamber 14 flows from the adjusting hole 1162 into the first chamber 152, and finally out through the replenishment channel 113 to the outside of the housing assembly 10 to support the load. The third oil circuit involves hydraulic oil flowing from the inlet channel 111 into the third flow channel 121, and then through the guide channel 131 into the pressure stabilizing chamber 151. This pushes the plunger 22 to slide back and forth along the first direction to adjust the flow area of the adjusting orifice 1162, thereby adjusting the amount of hydraulic oil in the replenishment channel 113. When the load pressure in the hydraulic system connected to the throttling device is zero, the plunger 22, pushed by the hydraulic oil, completely closes the adjusting orifice 1162. At this time, the flow area of the adjusting orifice 1162 is zero, and the throttling device does not need to supply hydraulic oil to the load through the replenishment channel 113. When the load pressure in the hydraulic system connected to the throttling device is not zero, as the load pressure increases, the load pressure acts on the side of the plunger 22 near the first chamber 152 along with the hydraulic oil in the replenishment channel 113, and then pushes the plunger along the first direction (i.e., Figure 3 The flow area of the regulating orifice 1162 can be increased as the load pressure increases. When the regulating orifice 1162 is fully opened, the load pressure on the hydraulic system containing the throttling device is also at its maximum (this load pressure is the maximum load pressure that the throttling device and the hydraulic system can withstand).
[0067] As can be seen, compared with the existing throttling device using a diaphragm, the throttling device of this application uses a plunger 22 to adjust the flow area of the regulating orifice 1162. The plunger 22 is not prone to fatigue deformation under the high pressure of hydraulic oil and the processing technology is also simpler. Therefore, the throttling device of this application not only has a longer service life, but also has a simpler processing technology, which can reduce production costs to a certain extent.
[0068] 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.
[0069] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0070] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A throttling device, characterized in that, include: The housing assembly (10) includes a first housing (11), a second housing (12), and a third housing (13); Adjustment assembly (20), the adjustment assembly (20) includes an elastic element (21) and a plunger (22); The first housing (11) and the third housing (13) are respectively fixed to the opposite ends of the second housing (12), and the first housing (11) and the second housing (12) form an oil replenishment cavity (14). The first housing (11), the second housing (12) and the third housing (13) form a cavity (15). The oil replenishment cavity (14) surrounds the outer periphery of the cavity (15) along the circumferential direction, and the oil replenishment cavity (14) and the cavity (15) are connected through an adjustment hole (1162). The first housing (11) is provided with an oil inlet channel (111), an oil outlet channel (112), and an oil replenishment channel (113). The oil inlet channel (111) and the oil replenishment channel (113) both extend along a first direction. The oil outlet channel (112) extends from one end away from the first housing (11) to one end close to the first housing (11) to penetrate the first housing (11). The first housing (11) is provided with a first flow channel (114) and a second flow channel (115) at one end close to the second housing (12). The oil inlet channel (111) and the oil outlet channel (112) are connected through the first flow channel (114). The oil inlet channel (111) and the oil replenishment chamber (14) are connected through the second flow channel (115). The oil replenishment channel (113) is connected to the cavity (15). The second housing (12) is provided with a third flow channel (121) that runs through the second housing (12) along the first direction, and the third housing (13) is provided with a guide flow channel (131) at one end near the second housing (12). One end of the third flow channel (121) is connected to the oil inlet channel (111), and the other end of the third flow channel (121) is connected to the cavity (15) through the guide flow channel (131). The plunger (22) is movably disposed in the cavity (15), the elastic element (21) extends and retracts along the first direction and abuts against the plunger (22) and the inner wall of the cavity (15), and the plunger (22) can slide back and forth along the first direction to adjust the size of the flow area of the adjustment hole (1162).
2. The throttling device according to claim 1, characterized in that, The first housing (11) includes a first annular protrusion (116), the third housing (13) includes a second annular protrusion (132), and the second housing (12) includes a through-hole section (122); The first annular protrusion (116) is disposed on the side of the first housing (11) near the second housing (12), and the second annular protrusion (132) is disposed on the side of the third housing (13) near the second housing (12). The through-hole section (122) penetrates the second housing (12) along the first direction, and the first annular protrusion (116) is inserted at one end of the through-hole section (122). The second annular protrusion (132) is inserted at the other end of the through-hole section (122) and abuts against the first annular protrusion (116) to form the cavity (15). The plunger (22) is movably disposed in the cavity (15) and divides the cavity (15) into a pressure stabilizing cavity (151) and a first chamber (152). The pressure stabilizing cavity (151) is closer to the third housing (13) than the first chamber (152). The oil replenishment channel (113) communicates with the first chamber (152), and the pressure stabilizing cavity (151) communicates with the guiding flow channel (131).
3. The throttling device according to claim 2, characterized in that, The inner wall of the first chamber (152) is provided with a first limiting step (1161), and the second annular protrusion (132) protrudes at least partially from the inner side of the first annular protrusion (116) to form a second limiting step (1321). The plunger (22) is slidably disposed between the first limiting step (1161) and the second limiting step (1321).
4. The throttling device according to claim 3, characterized in that, The adjustment hole (1162) is disposed on the first annular protrusion (116) and extends in the radial direction of the first annular protrusion (116), and the adjustment hole (1162) is located between the first limiting step (1161) and the second limiting step (1321) and close to the first limiting step (1161).
5. The throttling device according to claim 2, characterized in that, The first housing (11) is provided with a first annular groove (117) on the side near the second housing (12), and the through hole section (122) includes a first through hole section (1221) and a second through hole section (1222); Wherein, the first annular groove (117) surrounds the outer periphery of the first annular protrusion (116); The first through-hole section (1221) is closer to the first housing (11) than the second through-hole section (1222), and the radius of the first through-hole section (1221) is greater than the outer diameter of the first annular protrusion (116). The radius of the second through-hole section (1222) is equal to the outer diameters of the second annular protrusion (132) and the first annular protrusion (116). The first annular protrusion (116) is at least partially inserted into the second through-hole section (1222). The first annular groove (117) and the first through-hole section (1221) cooperate to form the oil replenishment cavity (14).
6. The throttling device according to claim 1, characterized in that, The oil replenishment channel (113) is connected at one end away from the second housing (12) and the oil outlet channel (112) is connected at one end away from the second housing (12).
7. The throttling device according to claim 1, characterized in that, The elastic element (21) includes a first elastic element (211) and a second elastic element (212); One of the first elastic element (211) and the second elastic element (212) abuts against the plunger (22) and the first housing (11), and the other of the first elastic element (211) and the second elastic element (212) abuts against the plunger (22) and the third housing (13).
8. The throttling device according to claim 7, characterized in that, Both the first elastic element (211) and the second elastic element (212) include at least one of a spring, a disc spring, and a rubber elastic element.
9. The throttling device according to any one of claims 1 to 8, characterized in that, The throttling device further includes a first sealing ring (30), a second sealing ring (40), and a third sealing ring (50); The first sealing ring (30) is disposed on the side of the first housing (11) away from the second housing (12) and extends along the outer periphery of the first housing (11); the second sealing ring (40) is located between the first housing (11) and the second housing (12) and extends along the outer periphery of the first housing (11); and the third sealing ring (50) is disposed between the second housing (12) and the third housing (13) and extends along the outer periphery of the second housing (12).
10. A hydraulic system, characterized in that, The hydraulic system includes the throttling device as described in any one of claims 1 to 9.