CN112146859B - Servo mechanism pneumatic loading device and servo mechanism zero pressure maintaining test method - Google Patents
Servo mechanism pneumatic loading device and servo mechanism zero pressure maintaining test method Download PDFInfo
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- CN112146859B CN112146859B CN202010922511.4A CN202010922511A CN112146859B CN 112146859 B CN112146859 B CN 112146859B CN 202010922511 A CN202010922511 A CN 202010922511A CN 112146859 B CN112146859 B CN 112146859B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a servo mechanism pneumatic loading device and a servo mechanism zero pressure maintaining test method, which comprises a pneumatic assembly, a loading assembly and a sliding assembly, wherein one end of the loading assembly is connected with the pneumatic assembly, the other end of the loading assembly is connected with a servo mechanism, one end of the sliding assembly is connected with the pneumatic assembly, and the other end of the sliding assembly is connected with the servo mechanism. The pneumatic assembly comprises a pneumatic loading cylinder and an air source assembly; the pneumatic loading cylinder is connected with the air source assembly and comprises a pneumatic loading piston. The pneumatic loading cylinder adopts the double-acting piston type cylinder, and utilizes a mode of abutting the piston rod, so that the functions of the piston of the servo mechanism under pressure and the piston under tension can be checked, the real load of an engine is simulated, the pressure difference of two cavities of the actuator of the servo mechanism is consistent with the pressure difference of the engine under load, and the zero position of the servo mechanism is subjected to pressure maintaining test.
Description
Technical Field
The invention relates to the technical field of servo mechanism testing, in particular to a servo mechanism pneumatic loading device and a servo mechanism zero pressure maintaining testing method, and particularly relates to a pneumatic loading device and a servo mechanism zero pressure maintaining testing method for a servo mechanism zero pressure maintaining test.
Background
Along with the development of rocket liquid engine technology and electro-hydraulic servo mechanism technology in China, the reliability requirement of long-time standby launching of a rocket is higher and higher, the zero position locking technology of the servo mechanism starts to expose the head angle on the carrying model, the hydraulic lock is used as a core component of the electro-hydraulic servo mechanism, and a piston rod of the servo mechanism is locked at any position in a mode of locking oil liquid in two cavities of an actuator, so that the load of the rocket carrying engine can be stably kept at any position. A new generation of liquid oxygen kerosene engine is an eccentric engine, an engine jet pipe is required to be arranged in a zero position before launch of a carrier rocket, a hydraulic lock is required to lock a servo mechanism piston rod in the zero position, the hydraulic lock can be normally opened when the carrier rocket is ignited, meanwhile, in order to adapt to the requirement of quick launch, a servo mechanism is required to have a self-locking function for some novel rockets, the engine position can be locked in a short period, the whole rocket test is convenient, the compression test period is short, and the hydraulic lock well adapts to the requirement. With the requirements of high-density development and launching of carrying models, the delivery progress of a servo mechanism is increasingly tense, the use frequency of personnel and equipment is higher and higher, a zero-position load pressure maintaining test of the servo mechanism is one of product delivery test items, and at present, a real engine mounting scheme is adopted, the equivalent weight of 4 servo mechanisms per batch of delivered rocket is adopted, and each product is mounted for 3 days, namely the load pressure maintaining test of the servo mechanism occupies 12 days of a real engine. The servo mechanism is used for mounting and dismounting the engine frame by 4 operators, which wastes time and labor.
In order to improve the testing efficiency of the load pressure maintaining of the servo mechanism and the delivery progress of products, reduce the occupancy rate of a real engine and reduce the labor intensity of operators, a set of device capable of replacing the load pressure maintaining test of the engine is urgently needed.
Patent document CN106404401a discloses a zero locking test device and a test method for a servo mechanism, wherein the test device comprises a rack assembly, a mass block assembly and a mechanical lever; the rack assembly is provided with a bottom plate and a cross beam, and 2n lower support lugs of the test stations are arranged on the upper surface of the bottom plate; the beam is arranged in parallel with the bottom plate, and n lever lugs are arranged on the beam; each mass block assembly comprises a balancing weight, a support rod and a hook; the balancing weight is fixed at one end of the supporting rod, and the hook is arranged at the other end of the supporting rod; n mechanical levers are provided, and each mechanical lever is sequentially provided with a stretching station pin shaft, a fulcrum mounting hole, a compression station pin shaft and a clamping groove; each mechanical lever is connected to one lever support lug through a fulcrum mounting hole; the hook is matched with the clamping groove. According to the scheme, the mass block assembly and the mechanical lever are combined for loading, so that large loading force for the servo mechanisms is realized, and a plurality of servo mechanisms can be tested at the same time.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a servo mechanism pneumatic loading device and a servo mechanism zero pressure maintaining test method.
The pneumatic loading device for the servo mechanism comprises a pneumatic assembly, a loading assembly and a sliding assembly, wherein one end of the loading assembly is connected with the pneumatic assembly, the other end of the loading assembly is connected with the servo mechanism, one end of the sliding assembly is connected with the pneumatic assembly, and the other end of the sliding assembly is connected with the servo mechanism.
Preferably, the pneumatic assembly comprises a pneumatic loading cylinder and an air source assembly, wherein the air source assembly comprises a switching valve, a pressure reducing valve, a first stop valve and a high-pressure air source;
the pneumatic loading cylinder is sequentially connected with the switching valve, the reducing valve and the first stop valve, the first stop valve is connected with the high-pressure air source, and the pneumatic loading cylinder comprises a pneumatic loading piston.
Preferably, the pneumatic loading cylinder is a double-acting cylinder and comprises two acting cavities, the switching valve comprises an inlet and two outlets, the two acting cavities of the pneumatic loading cylinder are respectively connected with the two outlets of the switching valve, and the inlet of the switching valve is connected with the pressure reducing valve;
and a first pressure gauge and a second pressure gauge are respectively arranged between the pneumatic loading cylinder and two outlets of the switching valve.
Preferably, the pneumatic loading cylinder is provided with a first quick-change connector and a second quick-change connector, the first quick-change connector and the second quick-change connector are respectively communicated with the two action cavities of the pneumatic loading cylinder, and the pneumatic loading cylinder is respectively connected with the two outlets of the switching valve through the first quick-change connector and the second quick-change connector.
Preferably, pneumatic subassembly still includes the exhaust pipe way, the exhaust pipe way sets up between diverter valve and relief pressure valve, is provided with the second stop valve on the exhaust pipe way.
Preferably, the loading assembly comprises a pin shaft assembly and a support lug, one end of the support lug is connected with the pneumatic loading piston, the other end of the support lug is connected with the servo mechanism piston through the pin shaft assembly, and the servo mechanism piston is located in the servo mechanism actuating cylinder and can move axially along the servo mechanism actuating cylinder.
Preferably, the round pin axle subassembly includes round pin axle, sleeve and retaining member, the sleeve is the cylinder, and the other end of journal stirrup is the U-shaped, is provided with the through-hole on the U-shaped arm, is provided with the through-hole on the free end of servo piston, and in the through-hole of the U-shaped arm of journal stirrup was arranged in to the sleeve, in the U-shaped opening of journal stirrup was arranged in to the servo piston, the round pin axle ran through the U-shaped arm of journal stirrup, the through-hole on sleeve and the servo piston, and the both ends of round pin axle are passed through the retaining member and are locked.
Preferably, the sliding assembly comprises a chuck, a bolt assembly, a locking nut and a pull rod, the chuck is clamped on the servo mechanism actuating cylinder through the bolt assembly, a first through hole is formed in the middle of the chuck, the servo mechanism piston penetrates through the first through hole, one or more second through holes are formed in the circumferential direction of the chuck, threads are arranged at two end portions of the pull rod, the pull rod penetrates through the second through hole and is locked by the locking nut at the rear end portion, the pull rod can axially slide along the second through hole, and the other end of the pull rod is connected with the pneumatic loading cylinder.
Preferably, one end of the pneumatic loading cylinder is provided with a flange, one or more threaded holes are formed in the circumferential direction of the flange, and the other end of the pull rod is connected with the threaded holes through end threads;
the chuck comprises two half-split chucks which are connected through a fastener.
According to the zero-position pressure maintaining test method for the servo mechanism, which is provided by the invention, the servo mechanism pneumatic loading device is adopted and is installed in a horizontal state of the servo mechanism, and the method comprises the following steps:
the method comprises the following steps: clamping two half-split chucks of the chuck at the end part of the servo mechanism actuating cylinder, wherein the two half-split chucks are connected through a fastener, and the chuck is connected with the servo mechanism actuating cylinder through a bolt component;
step two: one end of the support lug is connected to the pneumatic loading piston, and the other end of the support lug is connected to the servo mechanism piston through the pin shaft assembly;
step three: one end of the pull rod penetrates through a second through hole in the chuck, the rear end part of the pull rod is locked through a locking nut 3, and the other end of the pull rod is connected with a flange of the pneumatic loading cylinder through threads;
step four: the pneumatic loading cylinder is sequentially connected with a switching valve, a pressure reducing valve, a first stop valve and a high-pressure air source;
step five: and opening the first stop valve, adjusting the pressure of the pressure reducing valve, and switching a passage of the pneumatic loading cylinder through the switching valve so that the piston of the servo mechanism is in a pulled or pressed state to perform zero pressure maintaining test on the servo mechanism.
Compared with the prior art, the invention has the following beneficial effects:
1. the pneumatic testing device is simple in structure and convenient to operate, and can perform zero-position pressure maintaining test on the servo mechanism in a pressed state and a pulled state through loading the servo mechanism by the pneumatic assembly.
2. The invention inputs the working air pressure of a high-pressure air source into the pneumatic loading cylinder, the pneumatic loading cylinder adopts a double-acting piston type air cylinder, and then the mode of the opposite tops of the piston rods is utilized, so that the functions of the compressed piston and the pulled piston of the servo mechanism can be examined, the real load of the engine can be simulated, the pressure difference of two cavities of the actuator of the servo mechanism is consistent with the pressure difference of the engine during loading, and the zero position of the servo mechanism is subjected to pressure maintaining test.
3. The air source assembly adopts a high-pressure air source, adjusts the pneumatic pressure reducing valve, adjusts the input pressure to the working pressure of two cavities of the servo mechanism actuator, and can monitor the pressure gauge through the first pressure gauge and the second pressure gauge, so that the operation is convenient, the labor intensity is reduced, and the testing efficiency is improved.
4. The pneumatic loading device of the servo mechanism is installed in the horizontal state of the servo mechanism, the pneumatic loading cylinder is fixed with the servo mechanism through the chuck and the pull rod, the pneumatic loading piston is connected with the servo mechanism piston through the support lug and the pin shaft assembly, the servo mechanism is loaded in a piston abutting mode, the installation and debugging are rapid and convenient, the requirement on the skill of an operator is low, the number of the operators is reduced, and the labor cost is saved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of the connection between the servo piston and the pneumatic loading piston according to the present invention.
The figures show that:
First quick-change connector 11 of locking nut 3
Second quick-change connector 12 of chuck 4
Sleeve 602 pressure reducing valve 17
Retaining member 603 second stop valve 16
The lug 7 first stop valve 18
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The pneumatic loading device for the servo mechanism, provided by the invention, comprises a pneumatic assembly, a loading assembly and a sliding assembly, wherein one end of the loading assembly is connected with the pneumatic assembly, the other end of the loading assembly is connected with the servo mechanism, one end of the sliding assembly is connected with the pneumatic assembly, and the other end of the sliding assembly is connected with the servo mechanism. The servo mechanism comprises a servo mechanism actuating cylinder 1 and a servo mechanism piston 5, and the servo mechanism piston 5 moves axially relative to the servo mechanism actuating cylinder 1. The invention designs a servo mechanism pneumatic loading device to replace an engine load pressure maintaining scheme, adopts a piston rod opposite vertex mode to simulate the real load of an engine, and enables the pressure difference of two cavities of a servo mechanism actuator to be consistent with the pressure difference of the engine during load by adjusting the input pressure of an air cylinder.
The pneumatic assembly comprises a pneumatic loading cylinder 10 and an air source assembly, wherein the air source assembly comprises a switching valve 15, a pressure reducing valve 17, a first stop valve 18 and a high-pressure air source; the pneumatic loading cylinder 10 is sequentially connected with a switching valve 15, a pressure reducing valve 17 and a first stop valve 18, the first stop valve 18 is connected with a high-pressure air source, and the pneumatic loading cylinder 10 comprises a pneumatic loading piston 8. The pneumatic loading cylinder 10 comprises two action cavities for a double-acting cylinder, the switching valve 15 comprises two inlets and two outlets, the two action cavities of the pneumatic loading cylinder 10 are respectively connected with the two outlets of the switching valve 15, and the inlet of the switching valve 15 is connected with the pressure reducing valve 17. A first pressure gauge 13 and a second pressure gauge 14 are respectively arranged between the pneumatic loading cylinder 10 and two outlets of the switching valve 15. The pneumatic loading cylinder 10 is provided with a first quick-change connector 11 and a second quick-change connector 12, the first quick-change connector 11 and the second quick-change connector 12 are respectively communicated with two action cavities of the pneumatic loading cylinder 10, and the pneumatic loading cylinder 10 is respectively connected with two outlets of the switching valve 15 through the first quick-change connector 11 and the second quick-change connector 12. Pneumatic component still includes the exhaust pipe, the exhaust pipe sets up between diverter valve 15 and relief pressure valve 17, is provided with second stop valve 16 on the exhaust pipe, opens second stop valve 16 on the exhaust pipe and can discharges the purpose in order to reach the pressure release with remaining gas in the pneumatic component pipeline.
The loading assembly comprises a pin shaft assembly 6 and a support lug 7, one end of the support lug 7 is connected with a pneumatic loading piston 8, the other end of the support lug 7 is connected with a servo mechanism piston 5 through the pin shaft assembly 6, and the servo mechanism piston 5 is located in the servo mechanism actuator cylinder 1 and can move axially along the servo mechanism actuator cylinder 1. As shown in fig. 2, the pin assembly 6 includes a pin 601, a sleeve 602 and a locking member 603, the sleeve 602 is cylindrical, the other end of the support lug 7 is U-shaped, a through hole is provided on the U-shaped arm, a through hole is provided on the free end of the servo piston 5, the sleeve 602 is disposed in the through hole of the U-shaped arm of the support lug 7, the servo piston 5 is disposed in the U-shaped opening of the support lug 7, the pin 601 penetrates through the U-shaped arm of the support lug 7, the sleeve 602 and the through hole on the servo piston 5, and two ends of the pin 601 are locked by the locking member 603. Preferably, the axial direction of the sleeve is perpendicular to the direction of movement of the servo piston 5 and perpendicular to the direction of movement of the pneumatic loading piston 8.
The sliding assembly comprises a chuck 4, a bolt assembly 2, a locking nut 3 and a pull rod 9, wherein the chuck 4 is clamped on the servo mechanism actuating cylinder 1 through the bolt assembly 2, a first through hole is formed in the middle of the chuck 4, a servo mechanism piston 5 penetrates through the first through hole, one or more second through holes are formed in the circumferential direction of the chuck 4, threads are arranged at two ends of the pull rod 9, the pull rod 9 penetrates through the second through hole and is locked by the locking nut 3 at the rear end, the pull rod 9 can axially slide along the second through hole, and the other end of the pull rod 9 is connected with a pneumatic loading cylinder 10. One end of the pneumatic loading cylinder 10 is provided with a flange, one or more threaded holes are formed in the circumferential direction of the flange, and the other end of the pull rod 9 is connected with the threaded holes through end threads. The chuck 4 comprises two half-split chucks which are connected by a fastener.
According to the zero-position pressure maintaining test method for the servo mechanism, which is provided by the invention, the servo mechanism pneumatic loading device is adopted and is installed in a horizontal state of the servo mechanism, and the method comprises the following steps:
the method comprises the following steps: clamping two half-split chucks of a chuck 4 at the end part of a servo mechanism actuating cylinder 1, connecting the two half-split chucks through a fastener, and connecting the chuck 4 and the servo mechanism actuating cylinder 1 through a bolt component 2;
step two: one end of a support lug 7 is connected to a pneumatic loading piston 8, and the other end of the support lug is connected with a servo mechanism piston 5 through a pin shaft assembly 6;
step three: one end of a pull rod 9 penetrates through a second through hole in the chuck 4, the rear end part of the pull rod is locked through a locking nut 3, and the other end of the pull rod 9 is connected with a flange of a pneumatic loading cylinder 10 through threads;
step four: the pneumatic loading cylinder 10 is sequentially connected with a switching valve 15, a pressure reducing valve 17, a first stop valve 18 and a high-pressure air source;
step five: and opening a first stop valve 18, adjusting the pressure of a pressure reducing valve 17, switching the passage of the pneumatic loading cylinder 10 through a switching valve 15, and performing a zero pressure maintaining test on the servo mechanism by enabling the servo mechanism piston 5 to be in a pulled or pressed state.
While the basic embodiment of the present invention has been described above, the present invention will be described in more detail with reference to preferred embodiments and/or variations of the basic embodiment.
The embodiment is as follows:
a servo pneumatic loading device comprising: a pneumatic loading cylinder 10 having a flange-type through hole at one end; a pull rod 9 connected with a flange through hole of the pneumatic loading cylinder 10; a chuck 4 connected with one end of the pull rod 9; one end of the pneumatic loading piston is provided with a threaded pneumatic loading piston 8; the support lug 7 is connected with the pneumatic loading piston 8 through threads; a pin shaft component 6 connected with the support lug 7; the chuck 4 is axially provided with 4U-shaped through holes, and two radial ends of the chuck are provided with circular through holes; the pneumatic loading cylinder 10 is provided with a quick-connection connector (comprising a first quick-change connector 11 and a second quick-change connector 12) which can be quickly inserted into a pipeline of an air source assembly; the air source assembly comprises a pressure reducing valve 17, a first stop valve 18, a second stop valve 16, a switching valve 15 (preferably a manual switching valve), a first pressure gauge 13, a second pressure gauge 14, a quick-change connector and a pipeline.
The end part of the pull rod 9 is locked on the chuck 4 through the locking nut 3 connected with the screw thread. The chuck 4 comprises two half-split chucks, and the upper petals and the lower petals of the half-split chucks are connected through fasteners in a fastening mode. The pin shaft assembly 6 comprises a pin shaft, a sleeve and a locking piece and is used for connecting and fastening the servo mechanism piston 5 and the support lug 7. The pneumatic cylinder is a double-acting linear equal-area piston type cylinder and is used for loading the servo mechanism piston 5 in a tension and compression mode. The air source assembly can realize the tension and compression test of the pneumatic loading cylinder, and the pneumatic loading pressure is adjusted through the pressure reducing valve 17.
The chuck 4 adopts a half-petal type structure, and the chuck 4 is clamped in a groove of the actuating cylinder 1 of the servo mechanism through the bolt component 2; a pneumatic loading piston 8 of the pneumatic loading cylinder 10 is connected with the support lug 7 through threads; a U-shaped through hole is formed in the chuck 4, circular through holes are uniformly formed in the cylinder body of the pneumatic loading cylinder 10, one end of a circular pull rod 9 is arranged in the U-shaped through hole of the chuck 4, and the other end of the circular pull rod is arranged in the circular through hole of the pneumatic loading cylinder 10; the chuck 4 is fixed with a pneumatic loading cylinder 10 through a pull rod 9, two ends of the pull rod 9 are connected with a locking nut 3 through threads, the servo mechanism actuating cylinder 1 is fixed with the pneumatic loading cylinder 10, a support lug 7 of the pneumatic loading cylinder 10 is connected with a servo mechanism piston 5 through a pin shaft assembly 6, and one end of a pin shaft is provided with threads and is connected with the locking nut through threads; two quick-connection connectors (a first quick-change connector 11 and a second quick-change connector 12) are arranged at two ends of the pneumatic loading cylinder 10 and are connected with an external high-pressure air source through a pipeline, and the pipeline is provided with a switching valve 15, a pressure reducing valve 17 and a first stop valve 18; opening a first stop valve 18, and if the switch 15 is switched to the left end, adjusting the pressure of a pressure reducing valve 17, so that the servo mechanism piston 5 is pressed; if the switching valve 15 is switched to the right end, the pressure of the pressure reducing valve 17 is adjusted, the servo mechanism piston 5 is pulled, and therefore the function of zero pressure maintaining test of the servo mechanism is achieved. After the test is finished, the pressure reducing valve 17 and the first stop valve 18 are closed, and the second stop valve 16 is opened to discharge the residual gas in the pipeline.
The pneumatic loading cylinder of the double-acting piston type of the opposite vertex of the servo mechanism piston can examine the tensile function of the servo mechanism piston rod and the tensile function of the piston rod. At present, a real engine is in an inverted mode, an engine spray pipe is upward, only the tensile function of a servo mechanism piston rod can be examined during a load pressure maintaining test, and the real launching working condition is a mode that the engine spray pipe is downward, namely the working condition that the servo mechanism piston rod is pressed, so that the pneumatic loading scheme can completely cover a servo mechanism target field test mode. The air source assembly adopts high-pressure nitrogen output by a workshop, the pneumatic loading cylinder is connected with the air source output port by the high-pressure hose, the first stop valve is opened, the pneumatic pressure reducing valve is adjusted, the input pressure is adjusted to the working pressure of two cavities of the servo mechanism actuator, and the pressure gauge on the input pipeline is monitored. The servo mechanism loading device is installed in a horizontal state of a servo mechanism, the pneumatic loading cylinder and the servo mechanism are fixed through the chuck and the pull rod, the pneumatic loading piston is connected with the servo mechanism piston through the support lug and the pin shaft assembly, the servo mechanism is loaded in a piston opposite jacking mode, the structure is installed without needing too many people to complete installation and debugging (only two people are needed to complete installation and debugging in one embodiment), the requirement on the skill of an operator is low, the operator is reduced, and the labor cost is saved. The pneumatic loading device for the servo mechanism has a simple structure, is convenient to install, can realize the parallel loading and examination of a plurality of servo mechanisms, and obviously improves the testing efficiency of zero-position pressure maintaining of the servo mechanisms compared with a real serial engine mounting mode. In summary, the invention provides a pneumatic loading device with a certain simple structure and convenient operation, which utilizes an external high-pressure air source to input proper working air pressure into a pneumatic loading cylinder through a pressure reducing valve bank, and then utilizes a mode of butting a piston rod to simulate the real load of an engine, so that the pressure difference of two cavities of an actuator of a servo mechanism is consistent with the pressure difference of the engine during loading, and the zero position of the servo mechanism is subjected to pressure maintaining test. The pneumatic loading device of the servo mechanism integrates air source control and axial loading technologies, is convenient to operate and quick to install, reduces labor intensity and improves testing efficiency.
In the description of the present application, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.
Claims (8)
1. The pneumatic loading device of the servo mechanism is characterized by comprising a pneumatic assembly, a loading assembly and a sliding assembly, wherein one end of the loading assembly is connected with the pneumatic assembly, the other end of the loading assembly is connected with the servo mechanism, one end of the sliding assembly is connected with the pneumatic assembly, and the other end of the sliding assembly is connected with the servo mechanism;
the pneumatic assembly comprises a pneumatic loading cylinder (10) and an air source assembly, wherein the air source assembly comprises a switching valve (15), a pressure reducing valve (17), a first stop valve (18) and a high-pressure air source;
the pneumatic loading cylinder (10) is sequentially connected with a switching valve (15), a pressure reducing valve (17) and a first stop valve (18), the first stop valve (18) is connected with a high-pressure air source, and the pneumatic loading cylinder (10) comprises a pneumatic loading piston (8);
the sliding assembly comprises a chuck (4), a bolt assembly (2), a locking nut (3) and a pull rod (9), the chuck (4) is clamped on the servo mechanism actuating cylinder (1) through the bolt assembly (2), a first through hole is formed in the middle of the chuck (4), a servo mechanism piston (5) penetrates through the first through hole, one or more second through holes are formed in the circumferential direction of the chuck (4), threads are arranged at two end portions of the pull rod (9), the pull rod (9) penetrates through the second through hole and is locked by the locking nut (3) at the rear end portion, the pull rod (9) can slide along the axial direction of the second through hole, and the other end of the pull rod (9) is connected with a pneumatic loading cylinder (10);
the pneumatic loading device is characterized in that a U-shaped through hole is formed in the chuck (4), circular through holes are uniformly formed in the cylinder body of the pneumatic loading cylinder (10), one end of a circular pull rod (9) is arranged in the U-shaped through hole of the chuck (4), and one end of the circular pull rod is arranged in the circular through hole of the pneumatic loading cylinder (10).
2. The servo pneumatic loading device according to claim 1, wherein the pneumatic loading cylinder (10) is a double-acting cylinder comprising two acting chambers, the switching valve (15) comprises one inlet and two outlets, the two acting chambers of the pneumatic loading cylinder (10) are respectively connected with the two outlets of the switching valve (15), and the inlet of the switching valve (15) is connected with the pressure reducing valve (17);
and a first pressure gauge (13) and a second pressure gauge (14) are respectively arranged between the pneumatic loading cylinder (10) and two outlets of the switching valve (15).
3. The servo pneumatic loading device according to claim 2, wherein the pneumatic loading cylinder (10) is provided with a first quick-change connector (11) and a second quick-change connector (12), the first quick-change connector (11) and the second quick-change connector (12) are respectively communicated with the two action chambers of the pneumatic loading cylinder (10), and the pneumatic loading cylinder (10) is respectively connected with the two outlets of the switching valve (15) through the first quick-change connector (11) and the second quick-change connector (12).
4. Servomechanism pneumatic loading device according to claim 1, characterised in that the pneumatic assembly also comprises an exhaust line arranged between the switching valve (15) and the pressure reducing valve (17), the exhaust line being provided with a second shut-off valve (16).
5. The servo mechanism pneumatic loading device according to claim 1, wherein the loading assembly comprises a pin shaft assembly (6) and a support lug (7), one end of the support lug (7) is connected with the pneumatic loading piston (8), the other end of the support lug (7) is connected with the servo mechanism piston (5) through the pin shaft assembly (6), and the servo mechanism piston (5) is located in the servo mechanism cylinder (1) and can move axially along the servo mechanism cylinder (1).
6. The servo pneumatic loading device according to claim 5, wherein the pin assembly (6) comprises a pin (601), a sleeve (602) and a locking member (603), the sleeve (602) is cylindrical, the other end of the support lug (7) is U-shaped, a through hole is formed in the U-shaped arm, a through hole is formed in the free end of the servo piston (5), the sleeve (602) is arranged in the through hole of the U-shaped arm of the support lug (7), the servo piston (5) is arranged in the U-shaped opening of the support lug (7), the pin (601) penetrates through the U-shaped arm of the support lug (7), the sleeve (602) and the through hole in the servo piston (5), and the two ends of the pin (601) are locked by the locking member (603).
7. The servo pneumatic loading device according to claim 1, wherein one end of the pneumatic loading cylinder (10) is provided with a flange, one or more threaded holes are formed in the circumferential direction of the flange, and the other end of the pull rod (9) is connected with the threaded holes through end threads;
the chuck (4) comprises two half split chucks which are connected through a fastener.
8. A servo mechanism zero pressure holding test method is characterized in that the servo mechanism pneumatic loading device of claims 1-7 is adopted, and the servo mechanism pneumatic loading device is installed in a servo mechanism horizontal state, and the method comprises the following steps:
the method comprises the following steps: clamping two half-split chucks of a chuck (4) at the end part of a servo mechanism actuating cylinder (1), connecting the two half-split chucks through a fastener, and connecting the chuck (4) and the servo mechanism actuating cylinder (1) through a bolt component (2);
step two: one end of a support lug (7) is connected to a pneumatic loading piston (8), and the other end of the support lug is connected with a servo mechanism piston (5) through a pin shaft assembly (6);
step three: one end of a pull rod (9) penetrates through a second through hole in the chuck (4), the rear end part of the pull rod is locked through a locking nut (3), and the other end of the pull rod (9) is connected with a flange of a pneumatic loading cylinder (10) through threads;
step four: the pneumatic loading cylinder (10) is sequentially connected with a switching valve (15), a pressure reducing valve (17), a first stop valve (18) and a high-pressure air source;
step five: and opening a first stop valve (18), adjusting the pressure of a pressure reducing valve (17), and switching a passage of a pneumatic loading cylinder (10) through a switching valve (15) to enable a servo mechanism piston (5) to be in a pulled or pressed state so as to perform a zero pressure maintaining test of the servo mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922511.4A CN112146859B (en) | 2020-09-04 | 2020-09-04 | Servo mechanism pneumatic loading device and servo mechanism zero pressure maintaining test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922511.4A CN112146859B (en) | 2020-09-04 | 2020-09-04 | Servo mechanism pneumatic loading device and servo mechanism zero pressure maintaining test method |
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| Publication Number | Publication Date |
|---|---|
| CN112146859A CN112146859A (en) | 2020-12-29 |
| CN112146859B true CN112146859B (en) | 2023-03-14 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63247636A (en) * | 1987-04-03 | 1988-10-14 | Samu Denshi Kikai:Kk | Control system for load in testing device |
| CN102507165A (en) * | 2011-10-14 | 2012-06-20 | 安徽博一流体传动股份有限公司 | Hydraulic element service life tester |
| CN106404401A (en) * | 2016-08-31 | 2017-02-15 | 北京精密机电控制设备研究所 | Zero-position locking test device and test method for servo mechanism |
| CN108087382A (en) * | 2017-11-30 | 2018-05-29 | 上海航天控制技术研究所 | A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method |
| CN209117336U (en) * | 2018-12-29 | 2019-07-16 | 常州电站辅机股份有限公司 | A kind of Pneuamtic actuator for valve model machine load test stand |
| CN111189641A (en) * | 2020-01-17 | 2020-05-22 | 湖北三江航天红峰控制有限公司 | Dynamic and static loading device of swing servo mechanism |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203572643U (en) * | 2013-10-31 | 2014-04-30 | 北京精密机电控制设备研究所 | Electromechanical servo mechanism rigidity testing device |
| CN110360187A (en) * | 2019-08-26 | 2019-10-22 | 上海衡拓液压控制技术有限公司 | Jet pipe type Servo Valve's Slide Valve axial direction match grinding and zero characteristic test device |
-
2020
- 2020-09-04 CN CN202010922511.4A patent/CN112146859B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63247636A (en) * | 1987-04-03 | 1988-10-14 | Samu Denshi Kikai:Kk | Control system for load in testing device |
| CN102507165A (en) * | 2011-10-14 | 2012-06-20 | 安徽博一流体传动股份有限公司 | Hydraulic element service life tester |
| CN106404401A (en) * | 2016-08-31 | 2017-02-15 | 北京精密机电控制设备研究所 | Zero-position locking test device and test method for servo mechanism |
| CN108087382A (en) * | 2017-11-30 | 2018-05-29 | 上海航天控制技术研究所 | A kind of Dual-energy source electrohydraudic servomechanism reliability growth test system and method |
| CN209117336U (en) * | 2018-12-29 | 2019-07-16 | 常州电站辅机股份有限公司 | A kind of Pneuamtic actuator for valve model machine load test stand |
| CN111189641A (en) * | 2020-01-17 | 2020-05-22 | 湖北三江航天红峰控制有限公司 | Dynamic and static loading device of swing servo mechanism |
Non-Patent Citations (1)
| Title |
|---|
| 杨林霖.数控机床伺服进给系统精度保持性试验研究.《中国优秀博硕士学位论文全文数据库(硕士)工程科技Ⅰ辑》.2014,(第6期), * |
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