CN117007231A

CN117007231A - Mobile pressure measuring device

Info

Publication number: CN117007231A
Application number: CN202311036168.3A
Authority: CN
Inventors: 吴盟; 黄颖; 李建霏; 卓帆; 郑松旺
Original assignee: Aecc Chengdu Engine Co ltd
Current assignee: Aecc Chengdu Engine Co ltd
Priority date: 2023-08-16
Filing date: 2023-08-16
Publication date: 2023-11-07

Abstract

The invention belongs to the technical field of industrial measuring devices, and particularly relates to a movable pressure measuring device, which comprises a box body and a pressure measuring device, wherein a display part of the pressure measuring device is arranged on one side surface of the box body far away from the bottom of the box body; the storage cabinet for placing the metal hose is arranged on the side, close to the bottom, of the box body, and the storage cabinet can be manually moved and is provided with the storage hose, so that convenience and ergonomics are improved.

Description

Mobile pressure measuring device

Technical Field

The invention belongs to the technical field of industrial measuring devices, and particularly relates to a movable pressure measuring device.

Background

During operation of an aircraft engine, the parameter of the oil pump regulator control, the post-compressor air pressure (Pk), may vary. Changes in Pk will necessarily affect changes in the maximum fuel supply to the engine, resulting in changes in the maximum speed of the engine rotor and the temperature before the turbine, and further, more serious problems are possible over-rotation of the engine rotor and over-temperature of the turbine.

And measuring the parameter Pk controlled by the oil pump regulator on an engine test bed by adopting a special device. The special device is in scattered fixed arrangement and is integrally built with the engine test bed frame, and can not be used and moved independently. The existing air pressure measuring device behind the air compressor has no storage space, the weight of the air pressure measuring device is heavy, and a metal hose with a length of tens of meters is additionally carried during measurement, so that the air pressure measuring device is laborious to carry; the application scene is limited, the handle switch is regulated to open and close the box cover in actual operation, sand dust or rainwater can enter the device, and various parts are damaged; the operation is inconvenient, and original device needs to be put on ground when using, need personnel to squat down and operate and read data, and human-computer engineering nature is poor.

Disclosure of Invention

In view of the above, the present invention provides a mobile pressure measuring device, which can be manually moved, and is provided with a locker with a storage hose, thereby increasing convenience and ergonomics.

In order to achieve the technical purpose, the invention adopts the following specific technical scheme:

a mobile pressure measurement device for measuring air pressure behind a high pressure compressor of an aircraft engine, the mobile pressure measurement device comprising:

the box body consists of a template, an anti-rust coating is arranged on the outer surface of the box body, and a moving wheel is arranged at the bottom of the box body;

the pressure measuring device comprises an air source hose joint, a pressure measuring device, an air supply hose joint and a pressure measuring hose joint; the air source hose connector and the air supply hose connector are arranged on the outer surface of the box body; the pressure measuring device is arranged in the box body and is communicated with the air source hose joint, the air supply hose joint and the pressure measuring hose joint;

wherein: the display part of the pressure measuring device is arranged on one side surface of the box body far away from the bottom of the box body; one side of the box body, which is close to the bottom, is provided with a storage cabinet for placing a metal hose.

Further, the pressure measuring device comprises a pressure reducer, an air filter, a first throttle valve, a second throttle valve and a pressure gauge;

one end of the pressure reducer is communicated with the air source hose joint, and the other end of the pressure reducer is communicated with one end of the air filter; the other end of the air filter is communicated with one end of the first throttle valve; the other end of the first throttle valve is simultaneously communicated with one end of the air supply hose joint and one end of the second throttle valve; the other end of the second throttle valve is communicated with the pressure gauge and the pressure measuring hose joint.

Further, the pressure measuring device is arranged on one side, far away from the bottom of the box body, of the box body; the valve rod adjusting handles of the pressure reducing valve, the first throttle valve and the second throttle valve are all arranged on an operating surface at the top of the box body; the operation surface is arranged in parallel with the bottom surface of the box body.

Further, the storage cabinet can be opened and closed.

Further, the pressure gauge is an electronic pressure gauge.

Further, the box body is provided with an observation surface connected with the operation surface; the display screen of the pressure gauge is arranged in the observation surface; the display screen of the pressure gauge is covered by a window plate which is arranged on the observation surface and can be opened and closed.

Further, the movable pressure measuring device further comprises an overhaul port which can be opened and closed; the access hole is arranged at a position on the box body, which is close to the pressure measuring device, and is opposite to the observation surface.

Further, the air source hose connector and the air supply hose connector are respectively arranged on two side surfaces of the box body; the pressure measuring hose joint and the air supply hose joint are arranged on the same side face of the box body.

Further, the air source hose connector, the pressure measuring hose connector and the air supply hose connector are quick connectors.

Further, the compressor is connected with the pressure measuring hose joint based on a transfer pipe; the transfer pipe includes:

one end of the air receiving pipe is connected with the engine air inlet three-way joint based on the blanking cover, and the other end of the air receiving pipe is provided with a threaded outlet;

the outer circumference of the first adapter is provided with a boss, and one end of the first adapter is in threaded connection with the gas receiving pipe based on external threads;

the metal hose is provided with internal thread knobs at two ends, and one internal thread knob is connected with external threads at the other end of the first adapter;

and one end of the second adapter is connected with the other internal thread knob based on external threads, and the other end of the second adapter is provided with external threads for being connected with the pressure measuring hose joint.

By adopting the technical scheme, the invention has the following beneficial effects:

the existing pressure measuring device is portable, the weight of the pressure measuring device is heavy, a metal hose with a length of tens of meters is needed to be carried, and the whole pressure measuring device is laborious to carry. The movable pressure measuring device is integrally designed, and the lower cabinet body is used for placing the metal hose, so that the labor burden is reduced.

The existing pressure measuring device needs to be opened when in actual operation, a hand is stretched into the box body to adjust the handle, meanwhile, the user squats down to read the pressure gauge, and the ergonomics are poor. The adjusting handle of the movable pressure measuring device is arranged on the operation panel, so that the case does not need to be opened; the pressure surface is heightened, and an operator can read the pressure surface by standing; the quick connector is adjusted to the side, and no interference is generated to the front operation and reading of an operator.

The movable pressure measuring device adopts the design of a fully-closed structure of the enclosure, and external foreign matters such as rain, sand and the like are fully considered from the structure, so that the damage to internal parts is avoided; the main body material is mainly made of sectional materials and plates, and is subjected to surface painting antirust coating treatment, and the parts adopt surface treatment processes such as bluing and the like so as to adapt to the equipment environment requirements; the directional wheels and the universal wheels (with brakes) are arranged, so that the anti-slip device is safe, and the risk of safety accidents is avoided.

The movable pressure measuring device is provided with the access window on the rear plate, the detachable cover plate is arranged, the parts and components are orderly arranged and installed, the parts and components are visible and easy to reach, and the positions of the parts which need to be maintained/overhauled can be reached by opening the cover plate.

The movable pressure measuring device adopts the battery-powered digital display type electronic pressure gauge, and is more accurate and more convenient than the mechanical pressure gauge in reading.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a schematic view showing an external structure of a mobile pressure measuring device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a pressure measuring device according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of a pressure gauge according to an embodiment of the present invention;

FIG. 4 is a schematic side view of a mobile pressure measurement device according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a transfer tube;

FIG. 6 is a schematic illustration of a hose connecting a source hose fitting to a nitrogen vehicle;

FIG. 7 is a schematic view of a hose connecting a gas source hose fitting to a nitrogen cylinder;

wherein: 1. a case; 101. a storage cabinet; 102. an operation surface; 103. an observation surface; 104. a window plate; 2. a moving wheel; 3. an air source hose connector; 4. a pressure measurement hose connector; 5. a pressure reducer; 6. air filtering; 7. a first throttle valve; 8. a second throttle valve; 9. a pressure gauge; 10. a gas supply hose connector; 11. an access opening; 12. a transfer tube; 121. a gas receiving pipe; 122. a first adapter; 123. a metal hose; 124. a second adapter; 125. and (5) plugging the cover.

Detailed Description

Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.

It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.

It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concepts of the disclosure by way of illustration, and only the components related to the disclosure are shown in the drawings and are not drawn according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.

In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.

In one embodiment of the invention, a mobile pressure measurement device is proposed for measuring the air pressure after a high-pressure compressor of an aircraft engine, as shown in fig. 1-4. The mobile pressure measurement device includes:

the box body 1 consists of a template, an anti-rust coating is arranged on the outer surface of the box body, and a moving wheel 2 is arranged at the bottom of the box body;

the pressure measuring device comprises an air source hose connector 3, a pressure measuring device, an air supply hose connector 10 and a pressure measuring hose connector 4; the air source hose connector 3 and the air source hose connector 10 are arranged on the outer surface of the box body 1; the pressure measuring device is arranged in the box body 1 and is communicated with the air source hose joint 3, the air supply hose joint 10 and the pressure measuring hose joint 4;

wherein: the display part of the pressure measuring device is arranged on one side surface of the box body 1, which is far away from the bottom of the box body 1; one side of the case 1 near the bottom is provided with a locker 101 for placing a metal hose.

In the present embodiment, the pressure measuring device includes a pressure reducer 5, an air filter 6, a first throttle valve 7, a second throttle valve 8, and a pressure gauge 9;

one end of the pressure reducer 5 is communicated with the air source hose joint 3, and the other end is communicated with one end of the air filter 6; the other end of the air filter 6 is communicated with one end of a first throttle valve 7; the other end of the first throttle valve 7 is simultaneously communicated with one end of the air supply hose joint 10 and one end of the second throttle valve 8; the other end of the second throttle valve 8 is communicated with a pressure gauge 9 and a pressure measuring hose joint 4.

In the present embodiment, the pressure measuring device is provided in the case 1 on the side away from the bottom of the case 1; the valve rod adjusting handles of the pressure reducing valve, the first throttle valve 7 and the second throttle valve 8 are arranged on an operating surface 102 at the top of the box body 1; the operation surface 102 is disposed parallel to the bottom surface.

In this embodiment, the storage cabinet 101 may be opened and closed.

In this embodiment, the access opening 11 is provided to be openable and closable.

In this embodiment, the pressure gauge 9 is an electronic pressure gauge 9.

In the present embodiment, the case 1 is provided with an observation surface 103 connected to the operation surface 102; the display screen of the pressure gauge 9 is arranged in the observation surface 103; the display screen of the pressure gauge 9 is covered by a retractable window plate 104 provided on the viewing surface 103.

In this embodiment, the mobile pressure measuring device further comprises an access opening 11; the access port 11 is provided in the case 1 at a position close to the pressure measuring device, and is provided so as to face the observation surface 103.

In the present embodiment, the air source hose connector 3 and the air supply hose connector 10 are respectively provided on both side surfaces of the case 1; the pressure measuring hose connector 4 is provided on the same side of the tank 1 as the air supply hose connector 10.

In this embodiment, the air source hose connector 3, the pressure measuring hose connector 4 and the air supply hose connector 10 are all quick connectors.

In this embodiment, the connection between the engine intake and the pressure hose connector 4 is based on a transfer tube 12 as shown in fig. 5; the transfer tube 12 includes:

a gas pipe 121, one end of which is used for connecting with an engine air inlet three-way joint based on a blanking cover 125, and the other end of which is provided with a threaded outlet;

a first adapter 122, a boss is provided on the outer circumference, and one end is screwed with the gas pipe 121 based on external threads;

the metal hose 123, both ends are provided with the internal thread knob, an internal thread knob is connected with external thread of another end of the first adapter 122;

and a second adapter 124, one end of which is connected with the other internal screw knob based on external screw thread, and the other end of which is provided with external screw thread for connecting with the pressure measuring hose connector 4.

The specific operating steps for Pk measurements using the present implementation are as follows:

1. seal inspection before use

In order to ensure accuracy of measurement of Pk, the pressure measuring device of this embodiment is a pressure nitrogen device, and air tightness inspection must be performed before and after use. The air tightness test comprises the following specific steps:

a) The cover of the access opening 11 is opened.

b) The nitrogen connection is carried out by using an adapter tube 12 with a steering joint at one end; selecting an air source hose according to air source requirements, and when the nitrogen air source is a nitrogen vehicle, using a hose which can be matched with the nitrogen vehicle as shown in fig. 6; when the nitrogen source is a nitrogen cylinder, a hose which can be matched with the nitrogen cylinder as shown in fig. 7 is adopted; and finally, connecting a nitrogen source with the pressure of (8-10) MPa with the air source hose joint 3.

c) Ensuring that the second throttle valve 8 is in a closed state and the first throttle valve 7 is in an open state. The needle rotates the handle of the pressure reducer 5 to a limit (i.e., an off state) to supply air to the air source hose connector 3 based on a nitrogen pump, and communicates with the pressure measuring hose connector 4 and the air supply hose connector 10 based on both ends of a sealing hose.

d) Soap is smeared at the three joints.

e) The open air source switch of the nitrogen inflating pump pulls open the window plate 104 of the pressure gauge 9, the power supply of the pressure gauge 9 is opened on the panel of the pressure gauge 9, the handle of the pressure reducer 5 is slowly adjusted to the gauge pressure of the pressure gauge 9 of 1.9MPa, and no bubbles are needed at the position of applying soap liquid.

f) The air source switch of the nitrogen pump is closed, the second throttle valve 8 is opened, the air pressure is released, the power supply of the pressure gauge 9 is closed, and the window is shielded by the window plate 104.

g) Removing the sealing hose and plugging the pressure measuring hose connector 4 and the air supply hose connector 10 by using a plug; the second throttle valve 8 is closed.

2. The present apparatus was used to perform Pk checks.

Before Pk is checked, it is first determined whether the engine is limited by the hydraulic booster (high-pressure rotation speed n 2) or by the high-pressure compressor post-air pressure (Pk) in the ground takeoff state based on the atmospheric temperature and pressure at the time of adjustment. When the engine take-off state is limited by Pk, the examination of Pk is performed according to the following 2.1 requirement, and when the engine take-off state is limited by the high-pressure rotation speed n2, the examination is performed according to the following 2.2 requirement.

2.1 when the engine takeoff state is limited by Pk

a) Checking the air tightness of the device according to 'one', and starting the power supply of the pressure gauge 9;

the lower blanking cover is detached from the assembling joint mouth of the engine air conduit, the pressure measuring hose joint 4 is connected based on the transfer tube 12, and the joint is locked by a fuse;

b) Starting the engine and warming up the engine, pushing the engine to take off state according to a test run program, and recording the air gauge pressure Pb after the high-pressure air compressor displayed by the pressure gauge on the device;

c) Pulling the engine to a slow running state according to a test running program;

d) Absolute pressure Pj of air after high pressure compressor:

e) Pulling the engine to a parking state according to a test run program;

f) Decomposing the transfer tube 12, and closing the power supply of the pressure gauge;

g) And restoring the plugging cover on the assembly joint, and testing the tightness of the joint when the next test is performed.

Note that: before disassembly of the transfer tube 12, the engine must be in a stopped state.

2.2 when the engine take-off condition is limited by the high pressure speed n2

b) The upper conduit of the original engine is connected with the joint mouth, the outer sleeve nut connected to the joint mouth of the conduit is loosened and unscrewed, the conduit is disconnected from the joint mouth, and the joint mouth is blocked and sealed by using the blocking cover 125 connected to the switching tube 12;

c) A safety valved air supply hose is connected to the exposed port of the conduit and the jacknut is tightened. And locking the connecting end of the air supply hose and the engine by using a fuse. ( And (3) injection: the opening pressure of the safety valve is 2MPa, and the full discharge pressure is 2.4MPa )

d) Unscrewing a blocking cover on the connector, connecting the air supply hose to the connector, screwing up the outer sleeve nut, and locking the air supply hose and the connecting end of the engine by using a fuse;

e) The other ends of the hose for air supply with a safety valve and the adapter tube 12 are connected to the pressure measuring hose joint 4 and the air supply hose joint 10, respectively;

f) Confirming that the first throttle valve 7 and the second throttle valve 8 are both in the closed positions, and connecting the air source hose joint 3 with a nitrogen source with the pressure of (8-10) MPa by means of an air source hose;

g) Starting the engine and warming up the engine, and pushing the engine to take off according to a test run program;

h) Opening a switch of a nitrogen source;

i) The first throttle valve 7 is opened steadily, the air supply pressure is limited to the oil pump regulator by gradually increasing the pressure reducer, and the gauge pressure Pb displayed by the device pressure gauge 9 at the moment when the engine speed n2 starts to be reduced is recorded;

j) Closing a switch of a nitrogen source, and pulling the engine to a slow-running state;

k) Calculating the absolute pressure Pj of air after the air high-pressure compressor;

l) comparing the Pj obtained by calculation with Pk recorded in an engine history book, regulating a Pk limit value according to requirements, and rechecking the regulated Pk until the deviation is in an acceptable range;

m) opening the second throttle valve 8 to release the nitrogen pressure;

n) closing the first throttle valve 7 and the second throttle valve 8;

o) pulling the engine to a stopped state according to a test run program;

p) decomposing a gas supply hose with a safety valve and an adapter tube 12, and closing a pressure gauge power supply;

q) restoring the cap and the jacknut on the fitting nipple and checking the tightness of the joint at the next test run.

The technical effect of this embodiment is:

The existing pressure measuring device needs to be opened when in actual operation, a hand is stretched into the adjusting handle of the box body 1, meanwhile, the user squats down to read the pressure gauge 9, and the ergonomics are poor. The adjusting handle of the movable pressure measuring device is arranged on the operation panel 102, so that the case does not need to be opened; the position of the pressure gauge 9 is heightened, and an operator can read the pressure gauge by standing; the quick connector is adjusted to the side, and no interference is generated to the front operation and reading of an operator.

The movable pressure measuring device adopts the battery-powered digital display type electronic pressure gauge 9, and is more accurate and more convenient than the mechanical pressure gauge 9 in reading.

The foregoing is merely specific embodiments of the disclosure, but the protection scope of the disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the disclosure are intended to be covered by the protection scope of the disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A mobile pressure measurement device for measuring air pressure after a high-pressure compressor of an aircraft engine, the mobile pressure measurement device comprising:

2. The mobile pressure measurement device of claim 1, wherein the pressure measurement device comprises a pressure reducer, an air filter, a first throttle valve, a second throttle valve, and a pressure gauge;

3. The mobile pressure measurement device of claim 2, wherein the pressure measurement device is disposed in the tank on a side thereof remote from the bottom of the tank; the valve rod adjusting handles of the pressure reducing valve, the first throttle valve and the second throttle valve are all arranged on an operating surface at the top of the box body; the operation surface is arranged in parallel with the bottom surface of the box body.

4. A mobile pressure measurement device as claimed in claim 3 wherein the stowage bin is arranged to be openable and closable.

5. The mobile pressure measurement device of claim 4, wherein the pressure gauge is an electronic pressure gauge.

6. The mobile pressure measurement device of claim 5, wherein the housing is provided with a viewing surface coupled to the operating surface; the display screen of the pressure gauge is arranged in the observation surface; the display screen of the pressure gauge is covered by a window plate which is arranged on the observation surface and can be opened and closed.

7. The mobile pressure measurement device of claim 6, further comprising an openable and closable access opening; the access hole is arranged at a position on the box body, which is close to the pressure measuring device, and is opposite to the observation surface.

8. The mobile pressure measurement device of claim 7, wherein the air supply hose connector and the air supply hose connector are disposed on two sides of the tank, respectively; the pressure measuring hose joint and the air supply hose joint are arranged on the same side face of the box body.

9. The mobile pressure measurement device of claim 8, wherein the air supply hose connector, the pressure measurement hose connector, and the air supply hose connector are quick-connect connectors.

10. The mobile pressure measurement device of claim 8, wherein the compressor is connected to the pressure measurement hose fitting via an adapter tube; the transfer pipe includes: