A large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment

Abstract

The present invention belongs to the technical field of pressure regulating and reducing valves, and specifically relates to a large-caliber high-pressure hydraulic pressure regulating and reducing valve for wind tunnel test equipment, wherein the valve body is provided with an inflow channel, an outflow channel and a pressure regulating and reducing cavity, the valve seat is fixed on the opening of the inflow channel and the pressure regulating and reducing cavity, the lower end of the noise reduction sleeve is fixedly connected to the valve seat, and the upper end is butted with the valve cover, a plurality of outflow holes are provided on the noise reduction sleeve, the cavity between the outer wall of the noise reduction sleeve and the inner wall of the pressure regulating and reducing cavity is connected with the outflow channel, the valve flap is fixedly installed on the valve flap cover, a through hole is provided on the valve flap, a plurality of balancing holes are provided on the upper wall of the valve flap cover, the valve flap cover is movably installed in the valve cover, the valve cover is fixed on the through hole between the pressure regulating and reducing cavity and the outside, the upper end of the valve flap cover is connected to the valve stem, and the valve stem passes through the valve cover and is connected to the piston rod of the hydraulic cylinder. The present invention can reduce the driving force of the opening and closing process, improve the adjustment accuracy; is beneficial to the on-site pipeline layout; plays the role of reducing noise and stabilizing airflow; and realizes the role of reducing noise and stabilizing airflow.

Description

Technical Field

[0001] The invention belongs to the technical field of pressure regulating and reducing valves, and in particular relates to a large-caliber high-pressure hydraulic pressure regulating and reducing valve for wind tunnel test equipment. Background Art

[0002] Wind tunnels play a vital role in the development of various aircraft, and the requirements for wind speed, pressure, flow rate and operating energy ratio required in the test process are getting higher and higher. At present, most wind tunnels adopt the energy storage temporary impulse type, that is, high-pressure air medium is stored in the air tank, and the flow rate and pressure required by the wind tunnel are instantly controlled through the fluid control system on the pipeline, and the established flow rate and pressure are required to be adjustable within a certain range, and there are requirements for accuracy and adjustment stability time. Due to the limited volume of the stored compressed air medium, the source pressure decays rapidly during the test, and there are also time requirements for the stability of the adjustment process of the fluid control system. Therefore, the fluid control system composed of valves needs to be equipped with a regulating valve that can be quickly adjusted to obtain a stable test airflow. In the process of continuous attenuation of the air source pressure, the regulating valve completes the pressure and flow regulation and outputs stably through motion control. The regulating valve required in this fluid system is similar to the regulating valve principle in the ordinary industrial fluid system, but various indicators are required to be demanding, not only requiring linearity within the adjustable range, high adjustment accuracy, fast response time, wide adjustment range, and high motion control accuracy. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment.

[0004] The present invention is achieved in this way. It provides a large-caliber high-pressure hydraulic pressure regulating and reducing valve for wind tunnel test equipment, including a valve body, a valve seat, a noise reduction sleeve, a valve disc, a valve disc cover, a valve cover, a valve stem and a hydraulic cylinder. The valve body is provided with an inflow channel, an outflow channel and a pressure regulating and reducing pressure cavity. An opening is provided between the inflow channel and the pressure regulating and reducing pressure cavity. The valve seat is fixed on the opening. The lower end of the noise reduction sleeve is fixedly connected to the valve seat, and the upper end is connected to the valve cover. A plurality of outflow holes are provided on the noise reduction sleeve. The cavity between the outer wall of the noise reduction sleeve and the inner wall of the pressure regulating and reducing pressure cavity is connected to the outflow channel. The valve disc is fixedly installed on the valve disc cover. A through hole is provided on the valve disc. A plurality of balancing holes are provided on the upper wall of the valve disc cover. The valve disc cover is movably installed in the valve cover. The valve cover is fixed on the through hole between the pressure regulating and reducing pressure cavity and the outside world. The upper end of the valve disc cover is connected to the valve stem, and the valve stem passes through the valve cover and is connected to the piston rod of the hydraulic cylinder.

[0005] Preferably, the valve flap is provided with a through hole in the center, the side of the valve flap is a throttling flap structure with a diameter gradually increasing from bottom to top, and the balancing hole on the upper wall of the valve flap cover is a divergent inclined hole.

[0006] Further preferably, an annular cavity is provided in the valve body outside the inflow channel, the annular cavity is connected to the pressure regulating and reducing cavity outside the noise reduction sleeve, and the annular cavity is connected to the outflow channel through a plurality of drainage holes.

[0007] Further preferably, the outflow holes on the noise reduction sleeve are arranged in a spiral manner.

[0008] Further preferably, the inflow channel and the outflow channel are coaxially arranged.

[0009] Further preferably, the valve cover and the hydraulic cylinder are supported and connected by a support rod, a piston coupling flange is provided at the lower end of the piston rod of the hydraulic cylinder, a valve stem coupling flange is provided at the upper end of the valve stem, and the piston coupling flange is fixedly connected to the valve stem coupling flange.

[0010] Further preferably, a circle of crimping ring is integrally provided on the outer side of the valve cover, a valve cover gland is pressed on the crimping ring, and the valve cover gland is fixedly connected to the valve body.

[0011] Further preferably, the calibers of the inflow channel and the outflow channel are DN600.

[0012] Further preferably, two first radial sealing rings are arranged between the valve cover and the valve stem, and a sealing ring pressure cover is provided on the outer side of the valve cover to fix and limit the first radial sealing rings.

[0013] Further preferably, a second radial sealing ring and an axial sealing ring are provided between the valve body and the valve cover.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] 1. Through the design of the balancing hole on the valve disc and the valve disc cover, the valve adopts a pressure self-balancing structure, which reduces the driving force during the opening and closing process and improves the adjustment accuracy;

[0016] 2. The inlet and outlet are coaxial structures, which is conducive to the on-site pipeline layout;

[0017] 3. The outlet is a porous drainage structure, which plays a role in reducing noise and stabilizing airflow;

[0018] 4. The opening of the noise reduction sleeve adopts a spiral hole layout to achieve the effect of noise reduction and stable airflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A cross-sectional view of the overall structure of the valve provided by the present invention;

[0020] Figure 2 This is the valve seat structure diagram;

[0021] Figure 3 This is the structural diagram of the noise reduction sleeve;

[0022] Figure 4 The structure diagram of the valve disc is shown in FIG.

[0023] Figure 5 This is the valve cover structure diagram. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0025] refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 The present invention provides a large-caliber high-pressure hydraulic pressure regulating and reducing valve for wind tunnel test equipment, comprising a valve body 1, a valve seat 2, a noise reduction sleeve 3, a valve disc 4, a valve disc cover 5, a valve cover 14, a valve stem 7 and a hydraulic cylinder 9. The valve body 1 is provided with an inflow channel 101, an outflow channel 102 and a pressure regulating and reducing pressure cavity. An opening is provided between the inflow channel 101 and the pressure regulating and reducing pressure cavity. The valve seat 2 is fixed on the opening. The lower end of the noise reduction sleeve 3 is fixedly connected to the valve seat 2, and the upper end is butt-jointed with the valve cover 14. A plurality of outflow holes are provided on the noise reduction sleeve 3, and the cavity between the outer wall of the noise reduction sleeve 3 and the inner wall of the pressure regulating and reducing chamber is connected to the outflow channel 102. The valve flap 4 is fixedly installed on the valve flap cover 5, and a through hole is provided on the valve flap 4. A plurality of balancing holes 501 are provided on the upper wall of the valve flap cover 5. The valve flap cover 5 is movably installed in the valve cover 14, and the valve cover 14 is fixed on the through hole between the pressure regulating and reducing chamber and the outside world. The upper end of the valve flap cover 5 is connected to the valve stem 7, and the valve stem 7 passes through the valve cover 14 and is connected to the piston rod of the hydraulic cylinder 9.

[0026] When the valve provided by the present invention is used to perform pressure reduction and regulation in a wind tunnel test, the valve is installed in the injection pipeline. During operation, the fluid enters the valve body 1 from the inflow channel 101. At this time, the pressure of the fluid is 10-38MPa and the flow rate is 200kg / s. The control system controls the hydraulic cylinder 9 to drive the valve stem 7 and the valve flap cover 5 to rise. The high-pressure fluid passes through the valve seat 2 and enters the cavity between the noise reduction sleeve 3 and the valve flap 4. A small amount of fluid enters the cavity between the valve flap cover 5 and the valve cover 14 from the through hole of the valve flap 4 and the balance hole on the valve flap cover 5, which plays a role of internal self-balancing. The control system controls the hydraulic cylinder 9 to drive the valve stem 7 and the valve flap cover 5 to descend. The compressed fluid goes out from the outflow hole on the noise reduction sleeve 3 and enters the cavity between the outer wall of the noise reduction sleeve 3 and the inner wall of the pressure regulating and reducing cavity, and then enters the outflow channel 102 through the hole between the cavity and the outflow channel 102 and flows out of the valve body. The pressure range of the fluid after adjustment is 1-5MPa.

[0027] The valve flap 4 is provided with a through hole in the center, and the side of the valve flap 4 is a throttling flap structure with a diameter gradually increasing from bottom to top. The gap distance between the valve flap 4 and the valve seat 2 can be adjusted according to the resistance requirements of different valves. The balancing hole 501 on the upper wall of the valve flap cover 5 is a divergent inclined hole. On the one hand, the process of establishing a balanced pressure in the cavity above the balancing hole is uniform and the force is stable, while reducing the output of the hydraulic cylinder 9.

[0028] In order to allow the fluid to flow out of the outflow channel 101 stably and evenly after pressure regulation and pressure reduction, as an improvement of the technical solution, an annular cavity 103 is provided in the valve body 1 outside the inflow channel 101, and the annular cavity 103 is connected to the pressure regulating and pressure reducing cavity outside the noise reduction sleeve 3, and the annular cavity 103 is connected to the outflow channel 102 through a plurality of drainage holes 104.

[0029] The outflow holes on the noise reduction sleeve 3 are arranged in a spiral, that is, the outflow holes are distributed on multiple spiral lines, and the distance between adjacent spiral lines gradually decreases from bottom to top. When the airflow passes through the noise reduction sleeve 3, it is a spiral hole arrangement structure from bottom to top, and the number of holes in each layer gradually increases. After flowing through the outflow holes, it converges in the middle cavity to adjust the airflow flow form.

[0030] In order to facilitate the pipeline layout at the installation site, optimize the flow channel structure, and reduce the flow channel resistance, as an improvement of the technical solution, the inflow channel 101 and the outflow channel 102 are coaxially arranged.

[0031] In order to reasonably support the hydraulic cylinder 9, as an improvement of the technical solution, the valve cover 14 and the hydraulic cylinder 9 are supported and connected by a support rod 8, a piston coupling flange 10 is provided at the lower end of the piston rod of the hydraulic cylinder 9, and a valve stem coupling flange 11 is provided at the upper end of the valve stem 7, and the piston coupling flange 10 is fixedly connected to the valve stem coupling flange 11.

[0032] Due to the strict requirements on valve sealing, in order to strengthen the sealing, as an improvement, a circle of crimping ring is integrally provided on the outer side of the valve cover 14, and a valve cover gland 13 is pressed on the crimping ring, and the valve cover gland 13 is fixedly connected to the valve body 1.

[0033] In order to increase the flow rate, as an improvement of the technical solution, the calibers of the inflow channel 101 and the outflow channel 102 are DN600.

[0034] In order to further strengthen the seal, as an improvement, two first radial sealing rings 6 are arranged between the valve cover 14 and the valve stem 7, and a sealing ring gland 12 is arranged outside the valve cover 14 to fix and limit the first radial sealing ring 6. A second radial sealing ring 16 and an axial sealing ring 15 are arranged between the valve body 1 and the valve cover 14.

Claims

1. A large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment, characterized in that: The invention comprises a valve body (1), a valve seat (2), a noise reduction sleeve (3), a valve disc (4), a valve disc cover (5), a valve cover (14), a valve stem (7) and a hydraulic cylinder (9); the valve body (1) is provided with an inflow channel (101), an outflow channel (102) and a pressure regulating and reducing chamber; an opening is provided between the inflow channel (101) and the pressure regulating and reducing chamber; the valve seat (2) is fixed on the opening; the lower end of the noise reduction sleeve (3) is fixedly connected to the valve seat (2) and the upper end is connected to the valve cover (14); the noise reduction sleeve (3) is provided with a plurality of outflow channels (102) and a plurality of pressure regulating and reducing chambers (102); The cavity between the outer wall of the noise reduction sleeve (3) and the inner wall of the pressure regulating and reducing chamber is connected to the outflow channel (102); the valve flap (4) is fixedly mounted on the valve flap cover (5); a through hole is arranged on the valve flap (4); a plurality of balancing holes (501) are arranged on the upper wall of the valve flap cover (5); the valve flap cover (5) is movably mounted in the valve cover (14); the valve cover (14) is fixed on the through hole between the pressure regulating and reducing chamber and the outside; the upper end of the valve flap cover (5) is connected to the valve stem (7); the valve stem (7) passes through the valve cover (14) and is connected to the piston rod of the hydraulic cylinder (9); An annular cavity (103) is provided in the valve body (1) outside the inflow channel (101); the annular cavity (103) is connected to the pressure regulating and reducing cavity outside the noise reduction sleeve (3); and the annular cavity (103) is connected to the outflow channel (102) via a plurality of drainage holes (104).

2. The large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment according to claim 1, characterized in that: The valve flap (4) is provided with a through hole in the center, the side of the valve flap (4) is a throttling flap structure with a diameter gradually increasing from bottom to top, and the balancing hole (501) on the upper wall of the valve flap cover (5) is a divergent inclined hole.

3. The large-caliber high-pressure hydraulic pressure-regulating and pressure-reducing valve for wind tunnel test equipment according to claim 1, characterized in that: The outflow holes on the noise reduction sleeve (3) are arranged in a spiral.

4. The large-caliber high-pressure hydraulic pressure-regulating and pressure-reducing valve for wind tunnel test equipment according to claim 1, characterized in that: The inflow channel (101) and the outflow channel (102) are coaxially arranged.

5. The large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment according to claim 1, characterized in that: The valve cover (14) and the hydraulic cylinder (9) are supported and connected via a support rod (8); a piston coupling flange (10) is provided at the lower end of the piston rod of the hydraulic cylinder (9); a valve stem coupling flange (11) is provided at the upper end of the valve stem (7); and the piston coupling flange (10) and the valve stem coupling flange (11) are fixedly connected.

6. The large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment according to claim 1, characterized in that: The outer side of the valve cover (14) is integrally provided with a circle of crimping ring, a valve cover gland (13) is pressed on the crimping ring, and the valve cover gland (13) is fixedly connected to the valve body (1).

7. The large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment according to claim 1, characterized in that: The calibers of the inflow channel (101) and the outflow channel (102) are DN600.

8. The large-caliber high-pressure hydraulic pressure-regulating and pressure-reducing valve for wind tunnel test equipment according to claim 1, characterized in that: Two first radial sealing rings (6) are arranged between the valve cover (14) and the valve stem (7) at the upper and lower parts, and a sealing ring pressure cover (12) is arranged on the outer side of the valve cover (14) to fix and limit the first radial sealing ring (6).

9. The large-caliber high-pressure hydraulic pressure-regulating and reducing valve for wind tunnel test equipment according to claim 1, characterized in that: A second radial sealing ring (16) and an axial sealing ring (15) are provided between the valve body (1) and the valve cover (14).

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