Valve element structure capable of effectively reducing hydraulic torque borne by rotary valve element

Abstract

The utility model relates to a valve core structure capable of effectively reducing hydraulic torque borne by a rotary valve core, a rotor valve core structure is divided into an upper end and a lower end, the upper end is a rotor of a rotary driving mechanism, the lower end is a cylindrical rotor valve core structure, and the rotor valve core structure is inserted into a valve sleeve and is in clearance fit with the valve sleeve; a plurality of grooves are formed in the cylindrical rotor valve element structure, and the grooves can exist independently and can also be connected through a plurality of holes. According to the design of the groove 5 and the flow guide hole channel 4, the unbalance phenomenon of pressure is relieved, the hydraulic torque borne by the rotor valve element is remarkably reduced, control over the valve element by a rotary driving mechanism is more stable, the rated pressure and the rated flow of the rotary direct-drive servo valve are greatly improved, and the performance of the rotary direct-drive servo valve is improved; and meanwhile, the dead weight of the rotor valve element is further reduced, the rotational inertia of the rotor valve element is reduced, and the production cost of the rotary direct-drive servo valve is reduced.

Description

Technical Field

[0001] The utility model relates to the field of rotor valve core structures, in particular to a valve core structure which can effectively reduce the hydraulic torque exerted on a rotating valve core. Background Art

[0002] The upper end of the existing rotor valve core is connected to a rotary drive mechanism. The driver drives the rotary drive mechanism, which in turn rotates the rotor valve core, thereby controlling the rotor valve core's opening. The rotor valve core has a two-layer groove structure, with each layer containing two identical grooves, symmetrically arranged around the central axis of the rotor valve core. The grooves are arc-shaped. When the rotary direct-drive servo valve is in operation, hydraulic oil flows through the arc-shaped grooves of the rotor valve core. Each arc-shaped groove is an independent hydraulic oil flow space and is not connected to each other.

[0003] When the rotary direct-drive servo valve is working, the arc-shaped slot structure will be subject to a large hydraulic force, generating a large torque opposite to the direction of rotation, resisting the motor's control over the valve core. The situation is most serious when the rotor valve core rotates from the initial zero position to half-open. The arc-shaped slots of the valve core are independent of each other, and the hydraulic oil in each arc-shaped slot will apply a torque in the same direction to the rotor valve core, resulting in a large resultant torque, which in turn increases the performance requirements for the servo motor. The existing servo motor and rotor valve core are affected by large hydraulic forces, resulting in low rated pressure and flow of the rotary direct-drive servo valve, which seriously affects the performance of the rotary direct-drive servo valve. The existing rotor valve core is heavy and has a large moment of inertia, which affects the motor's control over the valve core. The production cost of the rotary direct-drive servo valve is also high.

[0004] Therefore, those skilled in the art provide a valve core structure that can effectively reduce the hydraulic torque acting on the rotating valve core, so as to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the present utility model is to provide a valve core structure which can effectively reduce the hydraulic torque exerted on the rotating valve core, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A valve core structure that can effectively reduce the hydraulic torque exerted on a rotating valve core. The rotor valve core structure is divided into upper and lower ends. The upper end is the rotor of the rotary drive mechanism, and the lower end is the valve core structure of the cylindrical rotor. The rotor valve core structure is inserted into the valve sleeve and is clearance-matched with the valve sleeve. Several grooves are arranged on the cylindrical rotor valve core structure. The grooves can exist independently or be connected through several holes.

[0008] As a further solution of the present invention: a number of sharp-edged sealing lines are arranged corresponding to the groove, which are used to cooperate with the valve sleeve sealing line to achieve precise flow control; when the rotary direct-drive servo valve is working, the hydraulic oil flows through the groove of the rotor valve core; the cross-section of the groove is any regular line among straight lines, arcs, and broken lines, or any irregular line among curves and wavy lines and various shapes surrounded by the outer arc of the valve core.

[0009] As a further embodiment of the present invention, the grooves are M-shaped, symmetrical or asymmetrical, with straight edges on either side and an arc in the middle. The holes connecting the grooves are called diversion channels, which are used to guide the flow of hydraulic oil between the grooves. The cross-sectional shape of the diversion channels can be any regular shape such as a circle, an ellipse, a square, a triangle, a polygon, a petal, or a five-pointed star, or any shape formed by irregular straight lines or curves. The number of diversion channels can be set to any number.

[0010] As a further solution of the present invention: the diversion channel connecting the groove is any one of a straight channel, a curved channel, a broken line channel, or an irregular channel.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. The rotor valve core structure of this utility model utilizes grooves and diversion channels, significantly reducing the hydraulic torque applied to the rotor valve core. Under the same pressure differential, the hydraulic torque applied to the rotor valve core of this utility model is reduced by approximately two-thirds compared to existing technologies. This rotor valve core structure of this utility model improves the rated pressure and rated flow of the rotary direct-drive servo valve.

[0013] 2. The rotary direct-drive servo rotor valve core of the utility model increases the rated pressure of the valve by nearly two times and the rated flow by nearly double compared with the existing technology, which greatly improves the performance of the rotary direct-drive servo valve and expands the application field of the rotary direct-drive servo valve.

[0014] 3. The groove and guide channel design of the utility model reduces the dead weight of the rotor valve core and reduces the rotational inertia of the rotor valve core, which not only improves the operating stability of the rotary drive mechanism but also reduces the production cost of the rotary direct drive servo valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The schematic diagram of the structure of a valve core can effectively reduce the hydraulic torque acting on the rotating valve core.

[0016] Figure 2 This is a structural schematic diagram from another perspective of a valve core structure that can effectively reduce the hydraulic torque exerted on the rotating valve core.

[0017] Figure 3 This is a diagram of the M-shaped groove structure in the AA direction of a valve core structure that can effectively reduce the hydraulic torque exerted on the rotating valve core.

[0018] Figure 4 The figure shows the flow guide channel structure in the CC direction of a valve core structure that can effectively reduce the hydraulic torque exerted on the rotating valve core.

[0019] Figure 5 It is a structural diagram of the rotor valve core structure in the prior art.

[0020] Figure 6 This is a structural schematic diagram of the rotor valve core structure from another perspective of the prior art.

[0021] Figure 7 This is a diagram of the arc groove structure in the DD direction of the rotor valve core structure in the prior art.

[0022] In the figure: 1-rotor; 2-valve core structure; 3-sharp edge sealing line; 4-diversion channel; 5-groove; 6-straight edge structure; 7-arc structure; 8-arc groove. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figures 1 to 4 In the embodiment of the utility model, a valve core structure is provided that can effectively reduce the hydraulic torque exerted on the rotating valve core. The rotor valve core structure is divided into upper and lower ends. The upper end is the rotor 1 of the rotary drive mechanism, and the lower end is the valve core structure 2 of the cylindrical rotor. The rotor valve core structure is inserted into the valve sleeve and is clearance-matched with the valve sleeve. A plurality of grooves 5 are arranged on the cylindrical rotor valve core structure. The grooves 5 can exist independently or be connected by a plurality of holes. A plurality of sharp-edge sealing lines 3 are provided corresponding to the grooves 5, which are used to cooperate with the valve sleeve sealing lines to achieve precise flow control. When the rotary direct-drive servo valve is working, the hydraulic oil flows through the grooves of the rotor valve core.

[0025] The cross section of the groove 5 can be a regular line such as a straight line, an arc line, a broken line, or a variety of shapes surrounded by irregular lines such as a curve line, a wavy line, and an outer arc of the valve core. Figure 3 The groove 5 shown is an M-shaped groove structure. The M-shaped groove can be bilaterally symmetrical or asymmetrical. The two sides of the M-shaped groove structure are straight edge structures 6, and the middle part is an arc structure 7.

[0026] The hole connecting the grooves 5 is called the diversion channel 4, which is used to guide the hydraulic oil to flow between the grooves 5; the cross-sectional shape of the diversion channel 4 can be a regular shape such as a circle, an ellipse, a square, a triangle, a polygon, a petal, a five-pointed star, or any shape surrounded by irregular straight lines or curves. The number of the diversion channels 4 can be one or more. Figure 2 One of the diversion channel shapes is shown.

[0027] The diversion channel 4 connected to the groove 5 can be a straight channel, a curved channel, a broken line channel, etc., or even an irregular channel. Figure 4 The cross-sectional view shows one of the diversion channel structures.

[0028] See also Figures 5-7 In existing technical solutions, the arcuate groove 8 of the rotor valve core will cause obvious pressure imbalance, generating a large hydraulic torque. The hydraulic torque of the arcuate groove 8 is consistent in direction, and the superimposed resultant torque is very large, which resists the control of the valve core by the rotary drive mechanism. However, the design of the groove 5 and the diversion channel 4 of the present application alleviates the pressure imbalance phenomenon and significantly reduces the hydraulic torque on the rotor valve core. The rotary drive mechanism controls the valve core more stably, greatly improving the rated pressure and rated flow of the rotary direct-drive servo valve, and enhancing the performance of the rotary direct-drive servo valve. At the same time, it further reduces the deadweight of the rotor valve core, reduces the rotor valve core's rotational inertia, and reduces the production cost of the rotary direct-drive servo valve.

[0029] The rotor valve core structure of the present invention adopts a groove and guide channel design, which significantly reduces the hydraulic torque applied to the rotor valve core. Under the same pressure difference, the hydraulic torque applied to the rotor valve core of the present invention is reduced by about two-thirds compared with the existing technology; the rotor valve core structure of the present invention improves the rated pressure and rated flow of the rotary direct-drive servo valve. The rotary direct-drive servo rotor valve core of the present invention increases the rated pressure of the valve by nearly two times compared with the existing technology, and increases the rated flow by nearly double compared with the existing technology, greatly improving the performance of the rotary direct-drive servo valve and expanding the application field of the rotary direct-drive servo valve. The groove and guide channel design of the present invention reduces the dead weight of the rotor valve core and reduces the rotational inertia of the rotor valve core, which not only improves the operating stability of the rotary drive mechanism, but also reduces the production cost of the rotary direct-drive servo valve.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A valve core structure that can effectively reduce the hydraulic torque on a rotating valve core, characterized in that: The rotor valve core structure is divided into upper and lower ends, the upper end is a rotor (1) of a rotary drive mechanism, and the lower end is a valve core structure (2) of a cylindrical rotor. The rotor valve core structure is inserted into a valve sleeve and is clearance-matched with the valve sleeve. A plurality of grooves (5) are arranged on the cylindrical rotor valve core structure, and the grooves (5) can exist independently or be connected through a plurality of holes.

2. A valve core structure capable of effectively reducing the hydraulic torque exerted on a rotating valve core according to claim 1, characterized in that: The groove (5) is provided with a plurality of sharp-edged sealing lines (3) corresponding to the groove, which are used to cooperate with the valve sleeve sealing line to achieve precise flow control; when the rotary direct-drive servo valve is working, the hydraulic oil flows through the groove of the rotor valve core.

3. A valve core structure capable of effectively reducing the hydraulic torque exerted on a rotating valve core according to claim 1, characterized in that: The cross section of the groove (5) is a shape formed by any regular line among straight lines, arc lines and broken lines, or any irregular line among curves and wavy lines and the outer arc of the valve core.

4. A valve core structure capable of effectively reducing the hydraulic torque exerted on a rotating valve core according to claim 1, characterized in that: The groove (5) is an M-shaped groove structure, which adopts a bilaterally symmetrical or asymmetrical structure. Both sides of the M-shaped groove structure are straight edge structures (6), and the middle part is an arc structure (7).

5. The valve core structure capable of effectively reducing the hydraulic torque on the rotating valve core according to claim 1, characterized in that: The hole connecting the grooves (5) is called a diversion channel (4), which is used to guide the hydraulic oil to flow between the grooves (5); the cross-sectional shape of the diversion channel (4) is any regular shape among a circle, an ellipse, a square, a triangle, a polygon, a petal, a five-pointed star, or any shape surrounded by irregular straight lines and curves.

6. A valve core structure capable of effectively reducing the hydraulic torque exerted on a rotating valve core according to claim 5, characterized in that: The number of the diversion channels (4) is set to be several.

7. A valve core structure capable of effectively reducing the hydraulic torque exerted on a rotating valve core according to claim 1, characterized in that: The diversion channel (4) connected to the groove (5) is any one of a straight channel, a curved channel, a broken line channel, or a channel of irregular shape.

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