Hydraulic proportional valve sleeve

Abstract

The utility model provides a kind of hydraulic proportional valve sleeve, comprising: valve sleeve body;Valve sleeve body inside is equipped with axial through-hole, axial through-hole extends to another end from one end of valve sleeve body along axial direction, fluid in hydraulic proportional valve flows in valve sleeve body by axial through-hole;The inner wall of the valve sleeve body is equipped with at least two groups of V-type throttling grooves distributed along axial direction, fluid in the hydraulic proportional valve sequentially flows through each group of V-type throttling grooves, the radial dimension of the V-type throttling groove gradually decreases along the flow direction of fluid in the hydraulic proportional valve according to exponential law.The utility model's hydraulic proportional valve sleeve is designed by V-type gradually throttling groove, and flow control linearity is significantly optimized.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic proportional valve technology, specifically, it relates to a hydraulic proportional valve sleeve. Background Technology

[0002] With the advancement of Industry 4.0, digitalization has become a mainstream trend in the industrial sector. In the field of industrial fluid dynamics, the large-scale application of electronically controlled proportional valves is the best embodiment of digital hydraulics; therefore, developing more efficient, applicable, stable, and reliable proportional valve products has become an inevitable trend in the industry. The valve sleeve, as a key component of the proportional valve, is of paramount importance.

[0003] The problems with existing valve sleeves are: 1. Traditional valve sleeves are not linear enough when regulating oil flow; 2. They are easily blocked by impurities in the oil, causing the valve to jam and affecting the normal operation of the equipment.

[0004] Patent document CN104358887A discloses a proportional valve with adjustable flow control. It has at least two flow-limiting orifices, which are eccentric orifices. The lower end of the external connector's blind hole penetrates the lower end face of the lower valve body. The lower valve body has a two-section stepped structure, with a larger diameter section at the top and a smaller diameter section at the bottom. The upper section has an annular lower limiting boss. The upper valve body has a through hole, with the larger diameter section at the top being a central hole and the smaller diameter section at the bottom being an eccentric hole. A filter screen is installed in the larger diameter section. A sealing ring is installed in an annular groove on the bottom surface of the upper valve body. The upper end face of the lower valve body is in close contact with the bottom surface of the sealing ring. The smaller diameter section of the through hole in the upper valve body can simultaneously connect to any one of the flow-limiting orifices. This invention allows the lower and upper valve bodies to rotate relative to each other, enabling the smaller diameter section of the through hole in the lower valve body to connect to different flow-limiting orifices, thus changing the controlled flow rate and giving the proportional valve the function of flow regulation.

[0005] Patent document CN104358887A describes a proportional valve that controls the flow rate of liquid by setting a limited number of flow-limiting orifices with different diameters and controlling the flow of liquid through different flow-limiting orifices. However, since the flow-limiting orifices are ordinary circular through holes, this proportional valve cannot control the linear change of liquid flow rate within the valve. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of this utility model is to provide a hydraulic proportional valve sleeve.

[0007] A hydraulic proportional valve sleeve according to the present invention includes: Valve sleeve body 1; An axial through hole 2 is provided on the inner side of the valve sleeve body 1. The axial through hole 2 extends axially from one end of the valve sleeve body 1 to the other end. The fluid in the hydraulic proportional valve flows through the axial through hole 2 in the valve sleeve body 1. The inner wall of the valve sleeve body 1 is provided with at least two sets of V-shaped throttling grooves 3 distributed along the axial direction. The fluid in the hydraulic proportional valve flows through each set of V-shaped throttling grooves 3 in sequence. The radial dimension of the V-shaped throttling grooves 3 gradually decreases exponentially along the flow direction of the fluid in the hydraulic proportional valve.

[0008] Preferably, a turbulence buffer boss 4 is provided between adjacent V-shaped throttling grooves 3.

[0009] Preferably, the surface of the turbulence buffer boss 4 is covered with a tungsten carbide coating.

[0010] Preferably, an annular shape memory alloy ring 5 is embedded in the annular groove on the inner side of the middle part of the valve sleeve body 1, and the annular shape memory alloy ring 5 is connected to the annular groove by an interference fit.

[0011] Preferably, the annular shape memory alloy ring 5 is made of shape memory alloy material; the annular shape memory alloy ring 5 can change shape according to different temperatures of the fluid in the hydraulic proportional valve, thereby realizing temperature-adaptive dynamic gap adjustment.

[0012] Preferably, the valve sleeve body 1 is provided with a radially extending drain microhole 6, the drain microhole 6 connecting the bottom of the V-shaped throttling groove 3 with the radial outer side of the valve sleeve body 1.

[0013] Compared with the prior art, the hydraulic proportional valve sleeve of this utility model has the following beneficial effects: 1) The V-shaped gradient throttling groove design significantly optimizes the linearity of flow control; 2) Its overall structural design enables it to meet the usage requirements in different environments; 3) Drainage microholes are set at the bottom of the V-shaped throttling groove, which can effectively remove impurities in the oil, improving the reliability and service life of the valve sleeve; 4) A ring-shaped memory alloy ring is adopted. This alloy ring can automatically expand and contract with temperature changes, realizing temperature-adaptive dynamic gap adjustment, thereby adapting to changes in oil viscosity at different temperatures and ensuring that the valve sleeve can work stably under various oil viscosity conditions. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the external shape of the hydraulic proportional valve sleeve of this utility model. Figure 2 This is a cross-sectional view of the hydraulic proportional valve sleeve of this utility model. Figure 3 This is a top view of the hydraulic proportional valve sleeve of this utility model. The diagram shows: Detailed Implementation

[0015] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0016] like Figures 1 to 3 As shown, this utility model provides a high-precision, anti-pollution hydraulic proportional valve sleeve, which is suitable for high-precision hydraulic systems in engineering machinery, metallurgical equipment, and other applications.

[0017] Figure 2 The arrows in the diagram indicate the direction of fluid flow within the hydraulic proportional valve.

[0018] The hydraulic proportional valve sleeve of this utility model includes: a valve sleeve body 1, an axial through hole 2, a V-shaped throttling groove 3, a turbulent buffer boss 4, an annular shape memory alloy ring 5, and a drain micro-hole 6.

[0019] An axial through hole 2 is provided on the inner side of the valve sleeve body 1, extending from one end of the valve sleeve body 1 to the other end. Fluid in the hydraulic proportional valve flows through the axial through hole 2 within the valve sleeve body 1.

[0020] The inner wall of the valve sleeve body 1 is provided with two sets of V-shaped throttling grooves 3 distributed along the axial direction. The fluid in the hydraulic proportional valve flows through each set of V-shaped throttling grooves 3 in sequence. The radial dimension of the V-shaped throttling grooves 3 gradually decreases exponentially along the flow direction of the fluid in the hydraulic proportional valve. The V-shaped throttling grooves 3 make the flow rate change more uniform when the liquid in the valve flows through, thus improving the linearity of the liquid flow rate in the valve.

[0021] A turbulence buffer boss 4 is provided between adjacent V-shaped throttling grooves 3. The surface of the turbulence buffer boss 4 is covered with a tungsten carbide wear-resistant coating, which can improve the control accuracy of the proportional valve.

[0022] The valve sleeve body 1 is embedded with an annular shape memory alloy ring 5. This annular shape memory alloy ring 5 is made of shape memory alloy material and can achieve temperature-adaptive dynamic gap adjustment. The annular shape memory alloy ring 5 is located in an annular groove in the middle of the valve sleeve body 1, and the annular shape memory alloy ring 5 is connected to the annular groove of the valve sleeve body 1 by an interference fit. This annular shape memory alloy ring 5 can change shape with temperature changes, automatically expanding and contracting, thereby achieving temperature-adaptive dynamic gap adjustment. This adapts to changes in oil viscosity at different temperatures, ensuring stable operation of the valve sleeve under various oil viscosity conditions.

[0023] A drain micro-hole 6 is disposed on the valve sleeve body 1 and extends radially along the valve sleeve body 1. The drain micro-hole 6 connects the bottom of the V-shaped throttling groove 3 with the radially outer side of the valve sleeve body 1. The bottom of the V-shaped throttling groove 3 is the narrowest point of the groove, where impurities in the oil easily accumulate and cause blockage. Since impurities can be discharged through the drain micro-hole 6, the drain micro-hole 6 can improve the proportional valve's anti-pollution capability and solve the technical defect of easy valve sticking.

[0024] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0025] The specific embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the substantive content of this utility model. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A hydraulic proportional valve sleeve, characterized in that, include: Valve sleeve body (1); The valve sleeve body (1) has an axial through hole (2) on its inner side. The axial through hole (2) extends axially from one end of the valve sleeve body (1) to the other end. The fluid in the hydraulic proportional valve flows through the axial through hole (2) in the valve sleeve body (1). The inner wall of the valve sleeve body (1) is provided with at least two sets of V-shaped throttling grooves (3) distributed along the axial direction. The fluid in the hydraulic proportional valve flows through each set of V-shaped throttling grooves (3) in sequence. The radial dimension of the V-shaped throttling grooves (3) gradually decreases exponentially along the flow direction of the fluid in the hydraulic proportional valve.

2. The hydraulic proportional valve sleeve according to claim 1, characterized in that, A turbulence buffer boss (4) is provided between adjacent V-shaped throttling grooves (3).

3. The hydraulic proportional valve sleeve according to claim 2, characterized in that, The surface of the turbulent buffer boss (4) is covered with a tungsten carbide coating.

4. The hydraulic proportional valve sleeve according to claim 1, characterized in that, An annular shape memory alloy ring (5) is embedded in the annular groove on the inner side of the middle part of the valve sleeve body (1), and the annular shape memory alloy ring (5) is connected to the annular groove by an interference fit.

5. The hydraulic proportional valve sleeve according to claim 1, characterized in that, The annular memory alloy ring (5) is made of shape memory alloy material; the annular memory alloy ring (5) can change shape according to the different temperatures of the fluid in the hydraulic proportional valve, thereby realizing temperature adaptive dynamic gap adjustment.

6. The hydraulic proportional valve sleeve according to claim 1, characterized in that, The valve sleeve body (1) is provided with a drain microhole (6) extending radially, and the drain microhole (6) connects the bottom of the V-shaped throttling groove (3) with the radial outer side of the valve sleeve body (1).

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