CN111946834A

CN111946834A - Flow limiting device for controlling flow cross-sectional area of pipeline

Info

Publication number: CN111946834A
Application number: CN202010643492.1A
Authority: CN
Inventors: 张庆珍; 关喜峰; 肖娜
Original assignee: Xian Aircraft Industry Group Co Ltd
Current assignee: Xian Aircraft Industry Group Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2020-11-17

Abstract

The utility model provides a control pipeline flow cross section's current limiting device, contains current limiting device body, motor, toothed disc, regulating spindle, cone valve, the current limiting device body be a siphonozooid, have the ring flange respectively at the both ends of siphonozooid, the one end inner chamber of siphonozooid is greater than siphonozooid other end inner chamber, siphonozooid middle part is the toper inner chamber, cone valve and siphonozooid middle part toper inner chamber match, the front end and the cone valve of regulating spindle are connected, on the inner chamber wall of the fixed siphonozooid of bearing is passed through to the rear end of regulating spindle, the motor is fixed on the lateral wall of siphonozooid, the output of.

Description

Flow limiting device for controlling flow cross-sectional area of pipeline

Technical Field

The application relates to the design and manufacture technology of an airplane, in particular to a flow limiting device for controlling the flow cross section area of a pipeline, which is used for reducing the cross section of the pipeline in the design of an airplane environment control pipeline.

Background

The flow-limiting ring arranged on the airplane is mainly installed in a fluid pipeline and used for increasing the resistance of fluid during flowing, reducing the flow rate of the fluid, limiting the overlarge flow in the pipeline and reasonably distributing the proportion of the fluid so as to ensure the normal work of a downstream system and accessories. At present, a flow limiting device installed in a system pipeline mostly adopts a sizing ring or throat structure, the structure is simple, but the flow cross section area is a fixed value and cannot be adjusted, if the distribution proportion is not proper during a ground test of a hydraulic system, the flow limiting devices with different apertures need to be newly manufactured, and then the test verification is carried out again, the test period is long, and the system development period is long. The other flow-limiting ring device (patent publication No. CN204255667U) automatically controlling the flow cross-sectional area according to the flow adopts a rotating blade type structure, can realize automatic adjustment according to the flow, but has poor impact resistance under the condition of large flow, is easy to generate shock waves and deform, has higher requirement on the strength of the rotating blade, and has high processing cost. To solve the above technical problem, it is necessary to provide a flow-limiting device for controlling the flow cross-sectional area of a pipeline.

Disclosure of Invention

The utility model provides an aim at, based on above-mentioned reason, a control pipeline flow cross section's current limiting device is proposed, solve the drawback that traditional current limiting device is not adjustable, when the flow in the pipeline reaches its setting value, can be according to flow automatically regulated flow cross section, and can realize the accurate control of flow control process, pressure adjustment can also be carried out in the time of the current-limiting, in order to prevent because the pipeline is damaged or leak the emergence that influences downstream system, accidents such as damage appear in the annex greatly, thereby improve the reliability and the security of system.

The utility model provides a control pipeline flow cross section's current limiting device, its characterized in that contains current limiting device body, motor, toothed disc, regulating spindle, cone valve, the current limiting device body be a siphonozooid, have the ring flange respectively at the both ends of siphonozooid, the one end inner chamber of siphonozooid is greater than siphonozooid other end inner chamber, the siphonozooid middle part is the toper inner chamber, cone valve and siphonozooid middle part toper inner chamber match, the front end and the cone valve of regulating spindle are connected, on the inner chamber wall of the fixed siphonozooid of bearing was passed through to the rear end of regulating spindle, the motor was fixed on the lateral wall of siphonozooid, the output.

In order to realize automatic and reliable regulation of flow, the flow limiting device adopts a cone valve structure, the regulating shaft on the gear disc is driven by the motor to rotate so as to control the horizontal movement of the cone valve, and the flow limiting device is little influenced by flow and pressure fluctuation and has high stability.

In order to realize the accurate control of the flow regulation process, the cone valve of the flow limiting device is connected with the regulating shaft by fine threads, can be subjected to micro-regulation, and has good impact resistance and low manufacturing cost.

The beneficial effect of this application lies in: 1) the horizontal movement of the cone valve is controlled by driving the adjusting shaft of the gear disc to rotate through the motor, so that the problems of repeated processing, repeated replacement and long test period of a flow limiting device in a flow distribution test are solved, the system structure is optimized, the design mode of a traditional sizing flow limiting ring and a pressure regulator is avoided, and the flow limiting function and the pressure regulating function are combined into a whole; 2) through taper valve and regulating spindle adoption fine threaded connection, realized the accurate control of flow control process, simple structure is convenient for maintain.

The present application is described in further detail below with reference to the accompanying drawings of embodiments.

Description of the drawings:

FIG. 1 is a schematic view of a flow restriction device for controlling the cross-sectional flow area of a pipeline.

Fig. 2 is a schematic view of a bearing seat structure.

The numbering in the figures illustrates: the device comprises a tubular body 1, a motor 2, a gear disc 3, an adjusting shaft 4, a cone valve 5, a limiting pin 6, a bearing 7, a bearing seat 8 and a limiting groove 9.

Detailed Description

Referring to the attached drawings, the current limiting device for controlling the flow cross section of a pipeline comprises a body, a motor 2, a gear disc 3, an adjusting shaft 4, a cone valve 5, a limiting pin 6 and a bearing 7, wherein the body of the current limiting device is a tubular body 1, flange plates are respectively arranged at two ends of the tubular body 1, an inner cavity at one end of the tubular body 1 is larger than an inner cavity at the other end of the tubular body 1, the middle part of the tubular body 1 is a conical inner cavity, the cone valve 5 is matched with the conical inner cavity at the middle part of the tubular body, the front end of the adjusting shaft 4 is connected with the cone valve 5, the rear end of the adjusting shaft 4 is fixed on the inner cavity wall of the tubular body 1 through the bearing 7, the motor 2 is fixed on the outer side.

The front end of the adjusting shaft 4 is connected with the cone valve 5 by screw thread; the rear end of the adjusting shaft 4 is matched with the bearing 7 and fixed on the inner wall of the tubular body 1, the bearing seat 8 of the bearing 7 is a radial through cavity structure in the implementation, and the outer edge of the radial through cavity structure of the bearing seat 8 is fixed on the inner wall of the tubular body 1.

The bevel valve 5 is arranged between the tubular body 1 and the gear disc 3, the front end of the bevel valve 5 is of a conical structure and is matched with a conical inner cavity in the middle of the tubular body 1, the rear end of the bevel valve 5 is connected with the adjusting shaft 4 through fine threads, the middle of the adjusting shaft 4 is the convex gear disc 3, the adjusting shaft 4 is driven to rotate by the gear disc 3 in meshing with a driving gear connected with an output shaft of the motor 2, and the adjusting shaft 4 drives the bevel valve 5 to horizontally move in the tubular body 1. In order to ensure the stable operation of the cone valve 5, a limiting pin 6 is arranged on the cone valve 5, and the limiting pin 6 is matched with a limiting groove 9 arranged on the inner wall of the tubular body 1 to limit the motion axis and the motion stroke of the cone valve 5. Thereby achieving a horizontal movement of the cone valve 5.

During the use, with the current limiting device of this application in the ring flange access system pipeline at tubulose body both ends, under the normal operating condition, when the entry flow is less than the limiting value in the system pipeline, for reducing pressure loss, cone valve 3 keeps 100% aperture and does not do any regulation completely, when the entry flow increases, according to export feedback flow value, motor 2 drive gear dish 3 drives adjusting shaft 4 and rotates, under the effect of spacer pin 6, cone valve 5 is along adjusting shaft 4 radial horizontal motion, adjust the aperture change between cone valve 5 front end and the interior toper inner chamber of tubulose 1, thereby change the throttle area between cone valve 5 and tubulose 1, the flow of automatic limiting system guarantees to satisfy the normal operating flow of low reaches system. Meanwhile, the flow limiting device can regulate pressure while limiting flow. The length of the cone valve 5 can be calculated according to the matching design of the pressure and the flow at the inlet end of the pipeline.

In order to realize the automatic and reliable accurate adjustment of the adjusting process, a cone valve structure is adopted, the cone valve 5 is matched with the conical inner cavity on the tubular body 1, and the gear disc 3 drives the fine thread positioning structure between the adjusting shaft 4 and the cone valve 5, so that the cone valve is strong in impact resistance, the fine adjustment effect can be played, the cone valve 5 is ensured not to fall off in the horizontal movement process, and the accurate positioning when the flow limiting device is opened and closed is fully ensured.

Claims

1. The utility model provides a control pipeline flow cross section's current limiting device, its characterized in that contains current limiting device body, motor, toothed disc, regulating spindle, cone valve, the current limiting device body be a siphonozooid, have the ring flange respectively at the both ends of siphonozooid, the one end inner chamber of siphonozooid is greater than siphonozooid other end inner chamber, the siphonozooid middle part is the toper inner chamber, cone valve and siphonozooid middle part toper inner chamber match, the front end and the cone valve of regulating spindle are connected, the rear end of regulating spindle passes through the bearing to be fixed on the inner chamber wall of siphonozooid, the motor is fixed on the lateral wall of siphonozooid, the output of.

2. A flow-limiting device for controlling a flow cross-sectional area of a pipeline according to claim 1, wherein the cone valve is provided with a limit pin, and the limit pin is matched with a limit groove arranged on an inner wall of the tubular body to limit a motion axis and a motion stroke of the cone valve.

3. A flow restrictor device for controlling flow cross-sectional area of a conduit as claimed in claim 1, wherein said bearing seat of said bearing is a radial through-cavity structure.