CN203643085U - Positive step force test system - Google Patents
Positive step force test system Download PDFInfo
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- CN203643085U CN203643085U CN201420015870.1U CN201420015870U CN203643085U CN 203643085 U CN203643085 U CN 203643085U CN 201420015870 U CN201420015870 U CN 201420015870U CN 203643085 U CN203643085 U CN 203643085U
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Abstract
A positive step force test system comprises a force sensor installed on tested equipment, a positive step force generation apparatus carrying out instant force application on the tested equipment and a force bearing wall. The positive step force generation apparatus comprises a sealed positive step pneumatic cylinder, a positive step pneumatic control loop and a step cylinder pressure sensor monitoring inner cavity pressure of the positive step pneumatic cylinder. A thrust cylinder is arranged between the positive step pneumatic cylinder and the tested equipment. An inner cavity of the positive step pneumatic cylinder and an inner cavity of the thrust cylinder are connected through a loading channel. A push rod of the thrust cylinder acts on the tested equipment and the force sensor and a loading valve is arranged on the loading channel. The system possesses the advantage that generation time of the positive step force and the positive step force can be accurately adjusted.
Description
Technical field
The utility model relates to a kind of positive step force pilot system.
Background technology
The transmitting of satellite and the conversion of dimensional orientation are to rely on the duration of ignition and the direction of control engine to control.Before an engine of application, need to utilize sensing testing system to carry out the thrust situation of a large amount of detection tests with Accurate Determining engine, the performance of check engine.In the development process of sensing testing system, need it to carry out technical test, in use or after storage also will carry out performance repetition measurement simultaneously, be called and demarcate or calibration.The essence of demarcating and calibrate is all under the prerequisite of clear and definite sensor output and input relation, utilizes standard instruments to demarcate sensor.Sensing testing system is demarcated can be divided into static demarcating and dynamic calibration.Dynamic calibration is mainly dynamic response and the parameter relevant with dynamic response of research sensor.The dynamic calibration system of sensor is generally made up of standard force source, standard transducer, signal conditioner and acquisition system.Can be divided into steady-state sine exciting force source according to the form of standard dynamic force generating means power output signal, pulsed power source and phase step type power source.Because step signal has quite wide effective band, therefore can test the sensor of high frequency sound, and the in test proper vibration of actuated sensor.
At present, in the time of dynamic calibration, conventionally adopt negative step response curve as the foundation that power is compensated and revised, but actual add force curve with negative step response curve differs greatly, so revise, the precision of demarcation cannot verify.
In order to overcome above-mentioned shortcoming, Xie Xiaozhu, Hou Qinmei, Fu Jun equals to have delivered " a kind of dynamic test of power and emulation " in " Journal of System Simulation " the 14th the 12nd phase of volume in Dec, 2002, a kind of positive step force generating means is provided in literary composition, comprise the power sensor being arranged in moving frame, force block with the uniform quality of system under test (SUT), force block is connected with air bubble, air bubble comprises the normal pressure air chamber that is communicated with normal pressure source of the gas and the volume plenum chamber much smaller than normal pressure air chamber, between normal pressure air chamber and plenum chamber, be provided with unlatching piston, the delivery outlet of plenum chamber arranges pressure transducer, plenum chamber is connected with adapter, the air-flow pushing tow force block of adapter output, force block and adapter, power sensor and moving frame composition assembly.The shortcoming of this positive step force generating means is: 1, promote force block by air-flow, the expulsive force of air-flow exists very large uncertainty; 2, the pressure that air bubble can carry is limited, and it cannot regulate the time of positive step force generation and the size of positive step force.
Utility model content
In order to overcome the above-mentioned shortcoming of prior art, the utility model provides a kind of can accurately regulate the time of origin of positive step force and the positive step force pilot system of positive step force size.
Positive step force pilot system, comprises the power sensor being installed on tested equipment, positive step force generating means and the load wall to the tested equipment moment application of force; Positive step force generating means comprises positive step pneumatic cylinder, the positive step pressure control loop of sealing and monitors the step cylinder pressure transducer of positive step pneumatic cylinder chamber pressure;
Between positive step pneumatic cylinder and tested equipment, thrust cylinder is set, the positive inner chamber of step pneumatic cylinder and the inner chamber of thrust cylinder are by loading channel connection, and the push rod of thrust cylinder acts on tested equipment and power sensor, load passage and are provided with charge valve.
Further, thrust cylinder comprises the pneumaticpiston in cylinder body, cylinder body and is fixed on the piston rod on pneumaticpiston, the exposed junction jacking force sensor of piston rod; The inner chamber of thrust cylinder is divided into the first atmospheric pressure cavity and the second atmospheric pressure cavity by pneumaticpiston; The first atmospheric pressure cavity connects thrust pressure control loop;
Load channel setting between the first atmospheric pressure cavity and positive step pneumatic cylinder.
Further, load passage and comprise the first load ports that is opened in positive step pneumatic cylinder and the second load ports that is opened in the first atmospheric pressure cavity, the first load ports and the second load ports contraposition, charge valve is arranged at the first load ports place.
Further, charge valve comprises and loads the loading valve body of path adaptation and drive loading valve body to move to seal or open the valve body driving mechanism that loads passage, valve body driving mechanism comprise have load piston loading cylinder, be fixed on the valve rod loading on piston, loading cylinder pressure transducer and the on-load pressure control loop that monitoring loads in-cylinder pressure, valve rod is fixedly connected with loading valve body; Loading cylinder is fixed in positive step pneumatic cylinder.
Further, valve body driving mechanism is baric systerm, loads piston and loading cylinder is divided into first adds carrier gas cavity and second and add carrier gas cavity, and valve rod is located at second and is added carrier gas cavity, on valve rod, be socketed with loading spring, loading spring adds between the chamber wall of carrier gas cavity at loading piston and second; First adds carrier gas cavity is communicated with high-pressure air source, and second adds carrier gas cavity is provided with the second connection pore that is communicated with positive step pneumatic cylinder inner chamber; First adds carrier gas cavity is provided with and is communicated with first of positive step pneumatic cylinder inner chamber and is communicated with pore, and first is communicated with pore is provided with and allows air-flow through the first retaining valve that adds carrier gas cavity and enter positive step pneumatic cylinder inner chamber.
Further, retaining valve comprises the valve seat being tightly connected with loading cylinder, the valve ball that is communicated with pore cooperation with first and the one-way valve spring of connecting valve seat and valve ball, valve seat surrounds an inflatable chamber with loading cylinder, and valve seat is provided with the filling channel that is communicated with inflatable chamber and positive step pneumatic cylinder inner chamber.
Further, be provided with the boss extending internally in the first atmospheric pressure cavity, the second load ports is arranged at this boss, is also provided with the gas channel that is communicated with the second load ports and the first atmospheric pressure cavity on boss.
Further, the second atmospheric pressure cavity is communicated with gas-holder, and gas-holder is connected with low-pressure gas source.
Further, thrust cylinder control loop comprises the thrust cylinder pressure transducer of monitoring the first atmospheric pressure cavity internal pressure, is connected air inlet control path and the disappointing control path that makes the gas leak in the first atmospheric pressure cavity to the first atmospheric pressure cavity air inlet with high-pressure air source.
In the utility model, the principle that realizes of positive step force is: close charge valve, the pressure of positive step pneumatic cylinder inner chamber is raise, after meeting the demands etc. the pressure of positive step pneumatic cylinder inner chamber, the air pressure of controlled loading cylinder is opened charge valve and is loaded passage, the gas of positive step pneumatic cylinder inner chamber expand into rapidly in the first atmospheric pressure cavity, the volume of the first atmospheric pressure cavity is much smaller than the volume of positive step pneumatic cylinder inner chamber, and therefore, the pressure decreased of the positive step pneumatic cylinder inner chamber that gas expansion causes is very little.Because the speed of gas expansion is very fast, the pressure in the first atmospheric pressure cavity rises and stablizes rapidly, realizes the loading of positive step force.
The utlity model has following advantage: 1, by thrust cylinder, tested equipment and power sensor are exerted pressure, force value is accurately adjustable; 2, the pressure that the charge valve of air-cylinder type can bear is large, and by regulating charge valve to get final product time of origin and the step force size of accurate adjustment step force
.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that charge valve sealing loads passage.
Fig. 2 is that charge valve is opened the schematic diagram that loads passage.
Fig. 3 is the schematic diagram of charge valve.
Embodiment
With reference to accompanying drawing, further illustrate the utility model:
Positive step force pilot system, comprises positive step force generating means and the load wall 6 of the power sensor 2 being installed on tested equipment 1 to the tested equipment 1 moment application of force; Positive step force generating means comprises positive step pneumatic cylinder 3, the positive step pressure control loop of sealing and monitors the step cylinder pressure transducer A of positive step pneumatic cylinder 3 chamber pressures; Positive step pneumatic cylinder 3 is resisted against on load wall 6;
The thrust cylinder 4 that is provided with pneumaticpiston 41 between positive step pneumatic cylinder 3 and tested equipment 1, is fixed with piston rod 42, piston rod 42 jacking force sensors 2 on pneumaticpiston 41; The inner chamber of thrust cylinder 4 is divided into the first atmospheric pressure cavity 431 and the second atmospheric pressure cavity 432 by pneumaticpiston 41; The first atmospheric pressure cavity 431 connects thrust pressure control loop;
Between the first atmospheric pressure cavity 431 and positive step pneumatic cylinder 3, be provided with the loading passage being interconnected, load passage and be provided with charge valve.
Load passage and comprise the first load ports 3A that is opened in positive step pneumatic cylinder 3 and the second load ports 4A that is opened in the first atmospheric pressure cavity 431, the first load ports 3A and the second load ports 4A contraposition, charge valve is arranged at the first load ports 3A place.
Charge valve comprises with the loading valve body 54 of the first load ports 3A adaptation and drives the valve body driving mechanism that loads valve body 54 and move to seal or open the first load ports 3A, valve body driving mechanism comprise have load piston 52 loading cylinder 51, be fixed on the valve rod 53 loading on piston 52, loading cylinder pressure transducer B and the on-load pressure control loop that monitoring loads cylinder 51 internal pressures, valve rod 53 is fixedly connected with loading valve body 54; Loading cylinder 51 is fixed in positive step pneumatic cylinder 3.
Valve body driving mechanism is baric systerm, loading piston 52 is divided into first by loading cylinder 51 and adds carrier gas cavity 561 and second and add carrier gas cavity 562, valve rod 53 is located at second and is added carrier gas cavity 562, on valve rod 53, be socketed with loading spring 55, loading spring 55 adds between the chamber wall of carrier gas cavity 562 at loading piston 52 and second; First adds carrier gas cavity 561 is communicated with high-pressure air source, and second adds carrier gas cavity 562 is provided with the second connection pore 5621 that is communicated with positive step pneumatic cylinder 3 inner chambers; First adds carrier gas cavity 561 is provided with and is communicated with first of positive step pneumatic cylinder 3 inner chambers and is communicated with pore 5611, the first and is communicated with pores 5611 and is provided with and allows air-flow through the first retaining valve that adds carrier gas cavity 561 and enter positive step pneumatic cylinder 3 inner chambers.
On-load pressure control loop is communicated with first and adds carrier gas cavity 561, on-load pressure control loop comprises that loading intake channel, loading exhaust channel, the first safety valve a1 and induction first add the loading cylinder pressure transducer B of carrier gas cavity 561 internal pressures, load intake channel and comprise the first switch valve k1 and the first reduction valve j1 that are connected with high-pressure air source, load exhaust channel and comprise second switch valve k2, the first variable valve t1 and the first sound suppressor x1.When the first switch valve k1 opens, high-pressure air source adds carrier gas cavity 561 air inlets to first, and when second switch valve k2 opens, the first gas adding in carrier gas cavity 561 discharges through loading exhaust channel.
Retaining valve comprises and loads the valve seat 571 that is tightly connected of cylinder 51, is communicated with valve ball 572 that pore 5611 coordinates and the one-way valve spring 573 of connecting valve seat 571 and valve ball 572 with first, valve seat 571 surrounds an inflatable chamber with loading cylinder 51, and valve seat 571 is provided with the filling channel 5612 that is communicated with inflatable chamber and positive step pneumatic cylinder 3 inner chambers.
In the first atmospheric pressure cavity 431, be provided with boss 44, the second load ports 4A that extend internally and be arranged at this boss 44, on boss 44, be also provided with the gas channel 441 that is communicated with the second load ports 4A and the first atmospheric pressure cavity 431.
The second atmospheric pressure cavity 432 is communicated with gas-holder 45, and gas-holder 45 is connected with low-pressure gas source.
The first atmospheric pressure cavity 431 connects thrust cylinder pressure transducer C, and air inlet control path comprises the 4th switch valve k4 and the second reduction valve j2 that are connected with extraneous source of the gas, and disappointing control path comprises the 5th switch valve k5 and the 3rd sound suppressor x3.
The second atmospheric pressure cavity 432 is communicated with gas-holder 45, and gas-holder 45 is connected with low-pressure gas source, is provided with the 4th pressure transducer D between the second atmospheric pressure cavity 432 and gas-holder 45.Gas-holder 45 can guarantee that the air pressure in the second atmospheric pressure cavity 432 can not change because of the movement of pneumaticpiston 41.
In the utility model, the implementation procedure of positive step force is: in the gas-holder 45 being communicated with the second atmospheric pressure cavity 432, be filled with low-pressure air, the 4th pressure transducer D detects after the air pressure in gas-holder 45 and the second atmospheric pressure cavity 432 meets testing requirements and stops to gas-holder 45 and the interior inflation of the second atmospheric pressure cavity 432.
When original state, in positive step pneumatic cylinder inner chamber, there is no pressure-air, charge valve under the effect of loading spring 55 in open mode.
Under the jacking force effect of the spring 573 of the first retaining valve, valve ball 572 seals the first connection pore 5611.Open and load intake channel, be specially the top hole pressure of adjusting the first reduction valve j1, open the first switch valve k1, add carrier gas cavity 561 inflate to first, gas continues to pour first and adds in carrier gas cavity 561.Add the air pressure that carrier gas cavity 561, the first adds in carrier gas cavity 561 and increase and promote charge valve to moving near the direction of the first load ports 3A until loads valve body sealing loading passage along with gas continues to enter first.
Loading intake channel continues to add carrier gas cavity 561 to first and inflates, the first air pressure that adds carrier gas cavity 561 continues to rise, until the first pressure adding in carrier gas cavity 561 overcomes the jacking force of the first one-way valve spring 573 and valve ball 572 is pushed away to the first connection pore 5611, gas enters positive step pneumatic cylinder 3 inner chambers through the first connection pore 5611 and filling channel 5612, makes the pressure rises of positive step pneumatic cylinder 3 inner chambers.
Close the first switch valve k1 and the first reduction valve j1 when loading after the atmospheric pressure value scope that cylinder pressure transducer B detects that the pressure rises in positive step pneumatic cylinder 3 inner chambers requires to Pass Test.Detect that the air pressure in positive step pneumatic cylinder 3 inner chambers is greater than the atmospheric pressure value upper limit of testing pressure ball if load cylinder pressure transducer B, open the 3rd switch valve k3, positive step pneumatic cylinder 3 inner chambers are exitted to the external world, and the air pressure in positive step pneumatic cylinder 3 inner chambers is got back within the scope of satisfactory atmospheric pressure value.
Then, adjust the top hole pressure of the second reduction valve j2, open the 4th switch valve k4, pass into low-pressure gas to the first atmospheric pressure cavity 431, make pneumaticpiston 41 move and compress tested equipment 1 and power sensor 2 to the direction near tested equipment 1, after the pretightning force scope that the pressure detecting requires in Pass Test, close the 4th switch valve k4 and the second reduction valve j2 until power sensor 2.If power sensor 2 detects that pretightning force is excessive, open the 5th switch valve k5, the first atmospheric pressure cavity 431, to external world's venting, gets back in satisfactory range of pressure values pretightning force.
Then, adjust the aperture of the first variable valve t1, the aperture of the first variable valve t1 determines that first adds the deflation time of carrier gas cavity 561 and then determine rise time of positive step force.Open again second switch valve k2, make first to add the outside exhaust of carrier gas cavity 561.Add carrier gas cavity 562 and be communicated with positive step pneumatic cylinder 3 by the second connection pore 5621 due to second, therefore second to add the air pressure of carrier gas cavity 562 identical with the air pressure of step pneumatic cylinder just.First adds the air pressure continuous decrease in carrier gas cavity 561 until leave the first load ports 3A under the gas pressure of charge valve in charge valve spring 55 and positive step pneumatic cylinder 3 inner chambers, loading passage is unlocked, positive step pneumatic cylinder 3 inner chambers are to the interior inflation of the first atmospheric pressure cavity 431, the pressure rises in the first atmospheric pressure cavity 431.The first atmospheric pressure cavity 431 air pressure inside rise and cause charge valve to be subject to the thrust of the first atmospheric pressure cavity 431 and opening of accelerated loading valve.Along with opening and the rising of the first atmospheric pressure cavity 431 internal gas pressures of charge valve, the thrust output of pneumaticpiston 41 rises rapidly, completes the loading of positive step force.
Charge valve adopts air pressure type of drive, the pressure that can bear is large, and can accurately control by controlling the first deflation time that adds carrier gas cavity the rise time of positive step force, control the size of positive step force by controlling air pressure in positive step pneumatic cylinder, the rise time size adjustable, positive step force of positive step force is controlled.
The utlity model has following advantage: 1, by thrust cylinder, tested equipment and power sensor are exerted pressure, force value is accurately adjustable; 2, the pressure that the charge valve of air-cylinder type can bear is large, and by regulating charge valve to get final product time of origin and the step force size of accurate adjustment step force
.
Content described in this instructions embodiment is only enumerating of way of realization to utility model design; protection domain of the present utility model should not be regarded as only limiting to the concrete form that embodiment states, protection domain of the present utility model also and conceive the equivalent technologies means that can expect according to the utility model in those skilled in the art.
Claims (9)
1. positive step force pilot system, comprises the power sensor being installed on tested equipment, positive step force generating means and the load wall to the tested equipment moment application of force;
It is characterized in that: positive step force generating means comprises positive step pneumatic cylinder, the positive step pressure control loop of sealing and monitors the step cylinder pressure transducer of positive step pneumatic cylinder chamber pressure;
Between positive step pneumatic cylinder and tested equipment, thrust cylinder is set, the positive inner chamber of step pneumatic cylinder and the inner chamber of thrust cylinder are by loading channel connection, and the push rod of thrust cylinder acts on tested equipment and power sensor, load passage and are provided with charge valve.
2. positive step force pilot system as claimed in claim 1, is characterized in that: thrust cylinder comprises the pneumaticpiston in cylinder body, cylinder body and is fixed on the piston rod on pneumaticpiston, the exposed junction jacking force sensor of piston rod; The inner chamber of thrust cylinder is divided into the first atmospheric pressure cavity and the second atmospheric pressure cavity by pneumaticpiston; The first atmospheric pressure cavity connects thrust pressure control loop;
Load channel setting between the first atmospheric pressure cavity and positive step pneumatic cylinder.
3. positive step force pilot system as claimed in claim 2, it is characterized in that loading passage and comprise the first load ports that is opened in positive step pneumatic cylinder and the second load ports that is opened in the first atmospheric pressure cavity, the first load ports and the second load ports contraposition, charge valve is arranged at the first load ports place.
4. positive step force pilot system as claimed in claim 3, it is characterized in that charge valve comprises and loads the loading valve body of path adaptation and drive loading valve body to move to seal or open the valve body driving mechanism that loads passage, valve body driving mechanism comprise have load piston loading cylinder, be fixed on the valve rod loading on piston, loading cylinder pressure transducer and the on-load pressure control loop that monitoring loads in-cylinder pressure, valve rod is fixedly connected with loading valve body; Loading cylinder is fixed in positive step pneumatic cylinder.
5. positive step force pilot system as claimed in claim 4, it is characterized in that: valve body driving mechanism is baric systerm, loading piston is divided into first by loading cylinder and adds carrier gas cavity and second and add carrier gas cavity, valve rod is located at second and is added carrier gas cavity, on valve rod, be socketed with loading spring, loading spring adds between the chamber wall of carrier gas cavity at loading piston and second; First adds carrier gas cavity is communicated with high-pressure air source, and second adds carrier gas cavity is provided with the second connection pore that is communicated with positive step pneumatic cylinder inner chamber; First adds carrier gas cavity is provided with and is communicated with first of positive step pneumatic cylinder inner chamber and is communicated with pore, and first is communicated with pore is provided with and allows air-flow through the first retaining valve that adds carrier gas cavity and enter positive step pneumatic cylinder inner chamber.
6. positive step force pilot system as claimed in claim 5, it is characterized in that retaining valve comprises the valve seat being tightly connected with loading cylinder, the valve ball that is communicated with pore cooperation with first and the one-way valve spring of connecting valve seat and valve ball, valve seat surrounds an inflatable chamber with loading cylinder, and valve seat is provided with the filling channel that is communicated with inflatable chamber and positive step pneumatic cylinder inner chamber.
7. positive step force pilot system as claimed in claim 6, is characterized in that being provided with the boss extending internally in the first atmospheric pressure cavity, and the second load ports is arranged at this boss, is also provided with the gas channel that is communicated with the second load ports and the first atmospheric pressure cavity on boss.
8. positive step force pilot system as claimed in claim 7, is characterized in that the second atmospheric pressure cavity is communicated with gas-holder, and gas-holder is connected with low-pressure gas source.
9. positive step force pilot system as claimed in claim 8, it is characterized in that thrust cylinder control loop comprises the thrust cylinder pressure transducer of monitoring the first atmospheric pressure cavity internal pressure, be connected air inlet control path and the disappointing control path that makes the gas leak in the first atmospheric pressure cavity to the first atmospheric pressure cavity air inlet with high-pressure air source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420015870.1U CN203643085U (en) | 2014-01-10 | 2014-01-10 | Positive step force test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420015870.1U CN203643085U (en) | 2014-01-10 | 2014-01-10 | Positive step force test system |
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| Publication Number | Publication Date |
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| CN203643085U true CN203643085U (en) | 2014-06-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420015870.1U Withdrawn - After Issue CN203643085U (en) | 2014-01-10 | 2014-01-10 | Positive step force test system |
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| CN (1) | CN203643085U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712744A (en) * | 2014-01-10 | 2014-04-09 | 浙江大学 | Positive step force testing system |
| CN112284680A (en) * | 2020-11-08 | 2021-01-29 | 中国航空工业集团公司北京长城计量测试技术研究所 | Step force generator |
-
2014
- 2014-01-10 CN CN201420015870.1U patent/CN203643085U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712744A (en) * | 2014-01-10 | 2014-04-09 | 浙江大学 | Positive step force testing system |
| CN103712744B (en) * | 2014-01-10 | 2015-08-12 | 浙江大学 | Positive step force pilot system |
| CN112284680A (en) * | 2020-11-08 | 2021-01-29 | 中国航空工业集团公司北京长城计量测试技术研究所 | Step force generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140611 Effective date of abandoning: 20150812 |
|
| RGAV | Abandon patent right to avoid regrant |