Hydraulic regulating valve and valve flow regulation method

Abstract

This invention discloses a hydraulic regulating valve and a valve flow regulation method, comprising: a valve body, a valve core, an adjusting rod, and a drive mechanism. The valve core has a first valve port and a second valve port. The valve core is movably connected to the valve body, and a first hydraulic chamber is provided within the valve core. The adjusting rod is disposed within the valve body, and a second hydraulic chamber is provided within the valve body. The two ends of the adjusting rod are respectively located within the first hydraulic chamber and the second hydraulic chamber, and the first and second hydraulic chambers are interconnected. The drive mechanism is connected to the adjusting rod and can drive the adjusting rod to move towards either the first or the second hydraulic chamber. Since the two ends of the adjusting rod are located in the first and second hydraulic chambers respectively, the adjusting rod will be in a hydraulically floating state, thus achieving a near-unloaded state during adjustment. This effectively protects the drive mechanism and ensures that the drive mechanism can maintain smooth and long-term operation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of hydraulic pressure, in particular to a hydraulic regulating valve and a valve flow regulating method. BACKGROUND

[0002] It is known that the current hydraulic valve is usually pushed by hydraulic oil to the valve core, and the valve core can close or partially close the valve port on the valve body, thereby achieving the effect of changing the valve port area and regulating the valve flow. In order to change the feeding speed of the valve core, it is usually necessary to use a motor to adjust the volume of the oil chamber in which the hydraulic oil is located. However, this adjustment requires the motor to drive the parts to move in the hydraulic oil, which usually requires the motor to operate under high load, which will undoubtedly cause the motor to be easily worn out. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application proposes a hydraulic regulating valve which can reduce the loss of the driving device.

[0004] The present application also proposes a valve flow regulating method having the above-mentioned hydraulic regulating valve.

[0005] The hydraulic regulating valve according to the first aspect of the present application comprises a valve body, a valve core, an adjusting rod and a driving mechanism, the valve core has a first valve port and a second valve port; the valve core is movably connected in the valve body, the valve core can move close to and block the first valve port, the valve core can move away from the first valve port and make the first valve port and the second valve port communicate, the valve core is provided with a first oil chamber; the adjusting rod is arranged in the valve body, the valve body is provided with a second oil chamber, both ends of the adjusting rod are located in the first oil chamber and the second oil chamber respectively, the first oil chamber and the second oil chamber communicate with each other; the driving mechanism is connected with the adjusting rod and can drive the adjusting rod to move towards the first oil chamber or the second oil chamber.

[0006] The hydraulic regulating valve according to the present application has at least the following beneficial effects: after the hydraulic oil is introduced into the first oil chamber and the second oil chamber, the valve core can be pushed from the first oil chamber under continuous introduction, so that the valve core can push and close the first valve port or the second valve port. When the feeding speed of the valve core needs to be adjusted, the adjusting rod can be moved relative to the first oil chamber and the second oil chamber by the driving mechanism, so that the volume of the first oil chamber can be adjusted, and the oil pressure of the hydraulic oil and the feeding speed of the valve core can be changed.

[0007] The two ends of the adjusting rod are located in the first oil pressure cavity and the second oil pressure cavity respectively, so that the adjusting rod is in a hydraulic floating state, and the adjusting rod is close to a no-load state during adjustment, thereby effectively reducing the load borne by the driving mechanism, so that the driving mechanism can be effectively protected and kept in operation for a long time.

[0008] According to some embodiments of the present application, the driving mechanism comprises a motor and a nut seat, the adjusting rod has an external thread, and the motor is connected with the adjusting rod through the nut seat and can drive the movement of the adjusting rod.

[0009] According to some embodiments of the present application, the adjusting rod is connected with a positioning pin, and the positioning pin is slidingly connected in the valve body.

[0010] According to some embodiments of the present application, the two ends of the nut seat are located in the first oil pressure cavity and the second oil pressure cavity respectively, the contact area of the nut seat with the first oil pressure cavity is greater than the contact area of the nut seat with the second oil pressure cavity, and the first oil pressure cavity and the motor are located on the two sides of the nut seat.

[0011] According to some embodiments of the present application, a thrust bearing is arranged in the valve body, the nut seat is rotatably connected in the thrust bearing, and the thrust bearing is located between the first oil pressure cavity and the second oil pressure cavity and is pushed by the first oil pressure cavity to the valve body.

[0012] According to some embodiments of the present application, the thrust bearing has a gap, and the first oil pressure cavity and the second oil pressure cavity are connected with each other through the gap.

[0013] According to some embodiments of the present application, the force receiving area of the adjusting rod with the first oil pressure cavity and the force receiving area of the adjusting rod with the second oil pressure cavity are the same.

[0014] According to some embodiments of the present application, a valve cover is arranged on the valve body, an oil supply channel is arranged on the valve cover, and an electromagnetic valve is connected with the oil supply channel.

[0015] According to some embodiments of the present application, the first valve port is located on the side of the valve core, the second valve port is located on the end of the valve core, and the valve core can move axially under the push of the oil pressure in the first oil pressure cavity.

[0016] According to the valve flow adjusting method of the second aspect of the present application, the hydraulic adjusting valve is applied to the above-mentioned hydraulic adjusting valve, and the method comprises the following steps: introducing hydraulic oil into the first oil chamber and the second oil chamber, and immersing both ends of the adjusting rod in the hydraulic oil in the first oil chamber and the second oil chamber respectively; changing the length of the adjusting rod in the first oil chamber, thereby changing the volume of the first oil chamber, and further adjusting the maximum advance amount of the spool when the spool is pushed by the oil pressure.

[0017] According to the hydraulic adjusting valve of the present application, at least the following advantages are achieved: after the hydraulic oil is introduced into the first oil chamber and the second oil chamber, the hydraulic oil can continuously push the spool out of the first oil chamber, so that the spool can push and close the first valve port or the second valve port. When the advance speed of the spool needs to be adjusted, the adjusting rod can be driven to move relative to the first oil chamber and the second oil chamber by the driving mechanism, so that the volume of the first oil chamber can be adjusted, and the oil pressure of the hydraulic oil and the advance speed of the spool can be changed.

[0018] Both ends of the adjusting rod are located in the first oil chamber and the second oil chamber respectively, so that the adjusting rod is in a hydraulic floating state, so that the adjusting rod can be in a nearly load-free state during adjustment, and the load borne by the driving mechanism can be effectively reduced, so that the driving mechanism can be effectively protected and can be kept in operation for a long time.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and / or additional aspects and advantages of the present application will become apparent and be readily appreciated from the following description, including the appended drawings.

[0021] Figure 1 The schematic diagram of the hydraulic adjusting valve of the present application.

[0022] Reference signs: motor 100, guide sleeve 200, nut seat 300, second oil chamber 400, thrust bearing 500, valve cover 600, oil supply channel 650, valve body 700, first valve port 750, second valve port 780, adjusting rod 800, positioning pin 850, spool 900, first oil chamber 950. DETAILED DESCRIPTION

[0023] Embodiments of the present application are described below in the accompanying drawings, in which like reference numerals refer to like elements or elements with similar functionality throughout. The following detailed description describes embodiments that are provided by way of example only, and is not intended to limit the present application.

[0024] In the description of the present application, it needs to be understood that, if the orientation description, such as up, down, front, back, left, right and the like, is indicated by the orientation or position relationship shown in the drawings, it is only for the convenience of describing the present application and simplifying the description, and it is not intended to indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In the description of the present application, if several meanings are one or more, the meaning of multiple is two or more, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features or the order of the indicated technical features.

[0026] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0027] Reference Figure 1The hydraulic adjusting valve comprises a valve body 700, a valve core 900, an adjusting rod 800 and a driving mechanism, the valve core 900 is provided with a first valve port 750 and a second valve port 780, the valve core 900 is movably connected in the valve body 700, the valve core 900 can move close to and block the first valve port 750, the valve core 900 can move away from the first valve port 750 and make the first valve port 750 and the second valve port 780 communicate, the valve core 900 is provided with a first oil cavity 950, the adjusting rod 800 is arranged in the valve body 700, the valve body 700 is provided with a second oil cavity 400, two ends of the adjusting rod 800 are respectively located in the first oil cavity 950 and the second oil cavity 400, the first oil cavity 950 and the second oil cavity 400 communicate with each other, and the driving mechanism is connected with the adjusting rod 800 and can drive the adjusting rod 800 to move towards the first oil cavity 950 or the second oil cavity 400. After hydraulic oil is introduced into the first oil cavity 950 and the second oil cavity 400, the valve core 900 can be pushed from the first oil cavity 950 under continuous introduction, so that the valve core 900 can push and close the first valve port 750 or the second valve port 780. When the feeding speed of the valve core 900 needs to be adjusted, the adjusting rod 800 can be driven by the driving mechanism to move relative to the first oil cavity 950 and the second oil cavity 400, so that the volume of the first oil cavity 950 can be adjusted, and then the oil pressure of the hydraulic oil and the feeding speed of the valve core 900 can be changed. The two ends of the adjusting rod 800 are respectively located in the first oil cavity 950 and the second oil cavity 400, so that the adjusting rod 800 will be in a hydraulic floating state, so that the adjusting rod 800 can be close to a no-load state during adjustment, and then the load borne by the driving mechanism can be effectively reduced, so that the driving mechanism can be effectively protected and long-term and smooth operation of the driving mechanism can be ensured.

[0028] In some embodiments, referring to Figure 1 The driving mechanism comprises a motor 100 and a nut seat 300, the adjusting rod 800 is provided with external threads, and the motor 100 is connected with the adjusting rod 800 through the nut seat 300 and can drive the adjusting rod 800 to move. After the motor 100 is started, the nut seat 300 will be driven to rotate, so that the nut seat 300 can drive the adjusting rod 800 to move through thread transmission, and then the effect of driving the adjusting rod 800 to move can be directly and effectively achieved. The two ends of the adjusting rod 800 are subjected to force by hydraulic oil, so that the adjusting rod 800 will be in a hydraulic floating state, so that the load borne by the motor 100 can be effectively reduced, and then the service life of the motor 100 can be effectively prolonged.

[0029] Specifically, the nut seat 300 is threadedly connected to the middle part of the adjusting rod 800, and the two ends of the adjusting rod 800 are respectively located in the first oil cavity 950 and the second oil cavity 400.

[0030] Further, a guide sleeve 200 is arranged between the motor 100 and the valve body 700, and the nut seat 300 is rotatably connected in the guide sleeve 200, and the end of the guide sleeve 200 is provided with a gland, and the guide sleeve 200 is fixed by the gland.

[0031] In some embodiments, referring to Figure 1 The adjusting rod 800 is connected with a positioning pin 850, and the positioning pin 850 is slidably connected in the valve body 700. The positioning pin 850 can be relative to the adjusting rod 800 and the valve body 700, and the positioning pin 850 can limit the adjusting rod 800 and the valve body 700, so that the adjusting rod 800 can slide in the valve body 700, and cannot be driven to rotate by the nut seat 300, so as to effectively ensure that the adjusting rod 800 will be driven to adjust the volume of the first oil chamber 950, and will not be rotated in place and cannot adjust the volume of the first oil chamber 950.

[0032] In some embodiments, referring to Figure 1 The two ends of the nut seat 300 are located in the first oil chamber 950 and the second oil chamber 400, respectively, and the contact area of the nut seat 300 with the first oil chamber 950 is greater than that with the second oil chamber 400, and the first oil chamber 950 and the motor 100 are located on the two sides of the nut seat 300. Because the contact area of the nut seat 300 with the first oil chamber 950 is greater than that with the second oil chamber 400, the oil pressure of the first oil chamber 950 on the nut seat 300 will be greater than that of the second oil chamber 400 on the nut seat 300, and the nut seat 300 will be pushed by the oil pressure to move towards the motor 100, thereby effectively avoiding the problem that the nut seat 300 is separated from the motor 100 when being driven by the motor 100.

[0033] In some embodiments, referring to Figure 1 The valve body 700 is provided with a thrust bearing 500, and the nut seat 300 is rotatably connected in the thrust bearing 500, and the thrust bearing 500 is located between the first oil chamber 950 and the second oil chamber 400 and is pushed by the first oil chamber 950 to the valve body 700. When the hydraulic oil in the first oil chamber 950 pushes the nut seat 300, a thrust force towards the motor 100 is generated on the nut seat 300. The thrust bearing 500 can bear the thrust force, so that the nut seat 300 will not directly push the valve body 700, thereby effectively protecting the nut seat 300 and avoiding the problem of damage of the nut seat 300 during use.

[0034] Specifically, the nut seat 300 is sleeved with three bearings, one of which is the thrust bearing 500, and the other two bearings are located on the two sides of the thrust bearing 500 and can support the rotation of the nut seat 300.

[0035] In some embodiments, referring to Figure 1 , the thrust bearing 500 has a gap, and the first oil chamber 950 and the second oil chamber 400 are in communication with each other through the gap. The hydraulic oil in the first oil chamber 950 and the second oil chamber 400 can flow through the gap at the thrust bearing 500, so that the oil pressure in the first oil chamber and the second oil chamber can be effectively ensured to be close to the same, so that the oil pressure borne by the two ends of the adjusting rod 800 can be made close to the same, and the adjusting rod 800 can be in a hydraulic floating state, and the power required by the motor 100 to drive its operation can be effectively reduced.

[0036] Specifically, the above three bearings are all provided with gaps to ensure that the hydraulic oil can flow between the first oil chamber and the second oil chamber.

[0037] In some embodiments, referring to Figure 1 , the force receiving area of the adjusting rod 800 with the first oil chamber 950 and the force receiving area of the adjusting rod 800 with the second oil chamber 400 are the same. The force receiving area of the adjusting rod 800 in the first oil chamber 950 and the second oil chamber 400 is the same, so that the two ends of the adjusting rod 800 can be effectively ensured to be in the same force receiving state as much as possible, and the adjusting rod 800 can be in a hydraulic floating state, and the load borne by the adjusting rod 800 and the motor 100 can be reduced.

[0038] In some embodiments, referring to Figure 1 , the valve body 700 is provided with a valve cover 600, the valve cover 600 is provided with an oil supply channel 650, and the oil supply channel 650 is connected with a solenoid valve. The solenoid valve can adjust the oil inflow amount and the oil inflow speed of the hydraulic oil, so that the hydraulic oil can push the valve core 900 in the first oil chamber 950 according to the predetermined state, and the valve core 900 can smoothly and accurately close or partially close the first valve port 750 or the second valve port 780.

[0039] In some embodiments, referring to Figure 1The first valve port 750 is located on the side of the spool 900, and the second valve port 780 is located on the end of the spool 900. The spool 900 can be axially moved under the push of the oil pressure in the first oil chamber 950. When the spool 900 is pushed by the hydraulic oil, the spool 900 will be axially moved. During the movement of the spool 900, the side of the spool 900 will partially close the first valve port 750, thereby reducing the communication area of the first valve port 750 with the outside, and effectively reducing the valve flow of the hydraulic valve. After the spool 900 moves to the second valve port 780, the second valve port 780 will be directly and completely closed by the spool 900, thereby effectively achieving the effect of closing the hydraulic valve. By axially moving the spool 900, the valve flow between the first valve port 750 and the second valve port 780 can be simply and directly adjusted, and thus the operation function of the hydraulic valve can be effectively realized.

[0040] The second aspect of the present application provides an embodiment of a valve flow adjusting method, which is applied to the above hydraulic adjusting valve, and includes the following steps: introducing the hydraulic oil into the first oil chamber 950 and the second oil chamber 400, and immersing the two ends of the adjusting rod 800 in the hydraulic oil in the first oil chamber 950 and the second oil chamber 400, respectively; changing the length of the adjusting rod 800 in the first oil chamber 950 to change the volume of the first oil chamber 950, and thereby adjusting the maximum advance amount of the spool 900 when the spool 900 is pushed by the oil pressure. After the hydraulic oil is introduced into the first oil chamber 950 and the second oil chamber 400, the hydraulic oil can continuously push the spool 900 from the first oil chamber 950, so that the spool 900 can push and close the first valve port 750 or the second valve port 780. When the advance speed of the spool 900 needs to be adjusted, the adjusting rod 800 can be moved relative to the first oil chamber 950 and the second oil chamber 400 by the driving mechanism, so that the volume of the first oil chamber 950 can be adjusted, and thereby the oil pressure of the hydraulic oil and the advance speed of the spool 900 can be changed. The two ends of the adjusting rod 800 are located in the first oil chamber 950 and the second oil chamber 400, respectively, so that the adjusting rod 800 will be in a hydraulic floating state, thereby achieving that the adjusting rod 800 is close to a no-load state during the adjusting process, and thereby effectively reducing the load borne by the driving mechanism, so that the driving mechanism can be effectively protected, and the long-term and smooth operation of the driving mechanism can be ensured.

[0041] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, but it should be considered that any combination of the technical features is within the scope of the present application as long as the combination does not result in contradictions.

[0042] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-described embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A hydraulic regulating valve, characterized by, The hydraulic adjusting valve comprises: a valve body (700) having a first valve port (750) and a second valve port (780); a valve core (900) movably connected in the valve body (700), the valve core (900) being capable of moving close to and blocking the first valve port (750), the valve core (900) being capable of moving away from the first valve port (750) and making the first valve port (750) and the second valve port (780) communicate, the valve core (900) being provided with a first oil pressure cavity (950) therein; an adjusting rod (800) provided in the valve body (700), the valve body (700) being provided with a second oil pressure cavity (400) therein, two ends of the adjusting rod (800) being located in the first oil pressure cavity (950) and the second oil pressure cavity (400) respectively, the first oil pressure cavity (950) and the second oil pressure cavity (400) communicating with each other; a driving mechanism connected with the adjusting rod (800) and capable of driving the adjusting rod (800) to move towards the first oil pressure cavity (950) or the second oil pressure cavity (400); by changing the length of the adjusting rod (800) located in the first oil pressure cavity (950), the volume of the first oil pressure cavity (950) is changed, and then the maximum stroke of the valve core (900) when pushed by oil pressure is adjusted; after hydraulic oil is introduced into the first oil pressure cavity (950) and the second oil pressure cavity (400), the valve core (900) can be pushed from the first oil pressure cavity (950) under continuous introduction, so that the valve core (900) can push and close the first valve port (750) or the second valve port (780); the driving mechanism comprises a motor (100) and a nut seat (300), the adjusting rod (800) has an external thread, and the motor (100) is connected with the adjusting rod (800) through the nut seat (300) and can drive the adjusting rod (800) to move; the force receiving areas of the adjusting rod (800) and the first oil pressure cavity (950) and the force receiving areas of the adjusting rod (800) and the second oil pressure cavity (400) are the same.

2. The hydraulic adjusting valve according to claim 1, wherein: the adjusting rod (800) is connected with a positioning pin (850), and the positioning pin (850) is slidably connected in the valve body (700).

3. The hydraulic adjusting valve according to claim 1, wherein: two ends of the nut seat (300) are located in the first oil pressure cavity (950) and the second oil pressure cavity (400) respectively, the contact area of the nut seat (300) and the first oil pressure cavity (950) is greater than the contact area of the nut seat (300) and the second oil pressure cavity (400), and the first oil pressure cavity (950) and the motor (100) are located on two sides of the nut seat (300) respectively.

4. The hydraulic adjusting valve according to claim 3, wherein: The valve body (700) is provided with a thrust bearing (500), the nut seat (300) is rotatably connected in the thrust bearing (500), the thrust bearing (500) is located between the first oil chamber (950) and the second oil chamber (400) and is pushed by the first oil chamber (950) to the valve body (700).

5. The hydraulic regulating valve of claim 4, wherein: The thrust bearing (500) has a gap, and the first oil chamber (950) and the second oil chamber (400) are communicated with each other through the gap.

6. The hydraulic regulating valve of claim 1, wherein: The valve body (700) is provided with a valve cover (600), the valve cover (600) is provided with an oil supply channel (650), and the oil supply channel (650) is connected with a solenoid valve.

7. The hydraulic regulating valve of claim 1, wherein: The first valve port (750) is located at the side of the valve core (900), the second valve port (780) is located at the end of the valve core (900), and the valve core (900) can move axially under the push of the oil pressure in the first oil chamber (950).

8. A valve flow rate adjustment method applied to the hydraulic adjustment valve according to any one of claims 1 to 7, characterized by, The method comprises the following steps: Hydraulic oil is introduced into the first oil chamber (950) and the second oil chamber (400), and the two ends of the adjusting rod (800) are respectively immersed in the hydraulic oil in the first oil chamber (950) and the second oil chamber (400); The length of the adjusting rod (800) in the first oil chamber (950) is changed, so as to change the volume of the first oil chamber (950), and then the maximum stroke of the valve core (900) when pushed by the oil pressure is adjusted.

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