CN102235943A - Loading test device - Google Patents

Loading test device Download PDF

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Publication number
CN102235943A
CN102235943A CN2010101683799A CN201010168379A CN102235943A CN 102235943 A CN102235943 A CN 102235943A CN 2010101683799 A CN2010101683799 A CN 2010101683799A CN 201010168379 A CN201010168379 A CN 201010168379A CN 102235943 A CN102235943 A CN 102235943A
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China
Prior art keywords
loading
testing machine
frame
pin
load testing
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CN2010101683799A
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Chinese (zh)
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CN102235943B (en
Inventor
周祥华
姚铁军
徐国军
王燕玲
周涛
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Commercial Aircraft Corp of China Ltd
Shanghai Aircraft Design and Research Institute Commercial Aircraft Corporation of China Ltd
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Commercial Aircraft Corp of China Ltd
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Priority to CN201010168379.9A priority Critical patent/CN102235943B/en
Publication of CN102235943A publication Critical patent/CN102235943A/en
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Publication of CN102235943B publication Critical patent/CN102235943B/en
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Abstract

The invention discloses a loading test device. The loading test device comprises a support framework, a positive loading device and a lateral loading device; the support framework comprises a top frame, a base and two vertical side frames; the positive loading device is positioned between the two side frames, the height of the positive loading device is adjustable, and a loading end at the lower part of the positive loading device can move up and down and move little in the side direction; and the lateral loading device is positioned at the lower part of the positive loading device, is connected with the loading end and moves up and down together with the movement of the loading end. Through the loading test device provided by the invention, positive loading and lateral loading can be simultaneously realized for a static or moving device to be tested; and the loading test device has simple structure, is easy to manufacture and operate, and is suitable for testing various vertical lifting jacking devices.

Description

A kind of load testing machine
Technical field
The present invention relates to a kind of load testing machine, relate in particular to the load testing machine of performance under a kind of jacking apparatus loaded condition that is used to test various VTOL (vertical take off and landing).
Background technology
Make the field at Large-Scale Equipment, usually need designed security of products and reliability are tested.By outturn sample being had a mind to apply certain external load, and the product force-bearing situation of this external load in can using reality simulate, and can verify properties of product effectively, thereby avoid the problem that may occur in actual use.
With the aircraft lifting jack is example, and it is the important jacking apparatus that is used for Large-Scale Equipments such as aircraft are carried out maintenance and repair.In order to verify that can designed aircraft lifting jack satisfy the requirement of correlation technique standard, security, reliability when guaranteeing to use, each aircraft lifting jack must carry out load test before being delivered for use.
But traditional load test instrument often only can carry out the loading of forward load, and this can only satisfy the safety examination needs of part.Because in actual use, product also may be because reasons such as mismatch error be subjected to the side load perpendicular to forward load under severe force-bearing situation except the loading of forward.Thereby the existence of side load may cause the damage of jacking apparatus and cause the weight of institute's jacking to topple, and is accidents caused.
Still be example with the aircraft lifting jack, its internal leakage test of accepting, external leakage test, static test etc. only need to load forward load, and the content of the test of bearing the side force performance for another very important investigation lifting jack is dynamic test, then require to load forward load and side load simultaneously on aircraft jack oil cylinder piston rod top, and need the aircraft lifting jack at the Circularly liftable that keeps doing continuously repeatedly under this force-bearing situation total travel, to simulate the severeest force-bearing situation in its course of work.It should be noted that, in this loading procedure, lifting jack is initiatively flexible, and charger then is passive, the load that charger produces is equivalent to the weight that relative lifting jack axle center has produced centre-of gravity shift, the rough sledding that may occur when having simulated lifting jack jacking aircraft so substantially; At this moment, tested aircraft lifting jack is because the effect of side force, and because the influencing its top a little lateral shift may take place of gap and distortion, this has also proposed to adapt to the new requirement of this variation to test unit.Concerning this class load test, common load testing machine can't satisfy its needs.
In improvement practice process to load testing machine, some also occur and realized the design that side direction loads, more commonly utilize mechanisms such as at least two guideposts or gathering sill to realize moving of side direction charger.But to such structure, the accuracy requirement of making and installing is high and wayward, and manufacturing cost is higher relatively, and the side direction charger often clamping stagnation and tilt phenomenon occur because of various accidentalia easily in the moving up and down of process of the test.
Summary of the invention
Can address the above problem by the solution of the present invention.
The present invention proposes a kind of load testing machine, it comprises: support frame, forward charger and side direction charger; Wherein support frame comprises top frame, base and two vertical side frames, forms a closed frame; The forward charger is used for equipment under test is applied forward load between two side frames, and its height can be adjusted up and down along two side frames, and has loading end in its bottom, and loading end can move up and down along forward; The side direction charger is positioned at the below of forward charger, is connected with loading end and moves up and down with moving of loading end, is used for equipment under test is applied side load.
Alternatively, the forward charger can comprise upper beam and the forward oil cylinder that mutual square crossing is arranged, upper beam is connected on two side frames by for example two fixed pins, is used for the forward charger is fixed with respect to support frame, thus the fixedly force side that provides forward to load; The cylinder body of forward oil cylinder is connected by articulated manner with upper beam, can swing in perpendicular; The flexible end of forward oil cylinder is connected successively with positive force sensor, loading end, thereby has formed mobile loading of the present invention force side, in order to forward load to be provided.
Alternatively, side direction oil cylinder, lateral force sensors and adapter sleeve that described side direction charger comprises underbeam, links to each other along a straight line direction in the surface level, wherein the two ends of underbeam engage described two side frames, described loading end is positioned at its middle part, underbeam is the installation carrier of side direction oil cylinder, and, follow loading end and move up and down thereby loading end can drive whole side direction charger by the drive underbeam because described loading end is connected with underbeam by bearing pin; The stiff end of side direction oil cylinder links to each other with underbeam, its flexible end is connected successively with lateral force sensors and adapter sleeve, and finally be connected to the side of loading end, thereby make the loading that flexible end applied of side direction oil cylinder be delivered on the loading end, realize that the jacking apparatus for the treatment of test carries out the side direction loading by adapter sleeve.
Alternatively, the load(ing) point that combines with equipment under test that is positioned on the described loading end roughly overlaps with the center line extension intersection point of described forward oil cylinder and side direction oil cylinder, do like this is in order to load relatively intuitively, not need complicated conversion can obtain the side force data of actual loaded.
Alternatively, between loading end and underbeam, have bearing pin-pin-hole arrangement, be used to realize the connection between the two, the side direction charger can be moved up and down with moving of loading end, and the shape of cross section of pin-and-hole is greater than the cross sectional shape of bearing pin.
Preferably, the shape of cross section of pin-and-hole can be set to, and loading end and underbeam are maintained fixed along the forward loading direction, and can move a segment distance mutually along the side direction loading direction.This design has taken into full account the influence of the load(ing) point of equipment under test because of the issuable a small amount of lateral shift of lateral forces.By such structure; both effective transmission of guaranteeing the side direction loading when side direction loads can applied; can guarantee the security of test unit again; avoid because thereby maloperation makes the situation of the excessive damage of side force equipment under test; also be that the lateral force resistance performance of working as equipment under test does not meet the demands the safeguard measure the when lateral shift of generation is excessive.
It should be noted that, the cylinder body of described forward oil cylinder is connected by articulated manner with upper beam, thereby the forward oil cylinder can slightly be swung described loading end can be moved freely on a small quantity along side direction, this design has adapted to the stress point that institute's trial assembly puts and has changed because of the lateral position that side force produces, and avoids the side force to be loaded on the forward oil cylinder rather than on the equipment under test.This also is the measure of guaranteeing effective transmission of side direction loading.
Alternatively, have symmetrically arranged pin-and-hole on the side frame, have the fixed orifice that can aim at pin-and-hole on the upper beam, thus pin-and-hole that can be by penetrating aligning with fixed pin and fixed orifice and will put the beams in place and fix with respect to support frame.
Alternatively, pin-and-hole can be a plurality of, be set to along two rows of side frame distribution, thereby making to put the beams in place has multistage fixed position with respect to support frame.
Alternatively, support frame also comprises paired safety pin, it can insert in each pin-and-hole, and two ends stretch out the surface of side frame, thus reduced as far as possible owing to the forward charger in debugging, adjust the influence degree that the accident in position, the course of work drops and produces.
Alternatively, between the inner surface of the left end of described underbeam and left frame linear rolling guide is installed, further alternatively, slide block is installed in the left end of underbeam, and slide rail vertically is installed on the inner surface of left frame.Cooperation precision, the friction force that the present invention has made full use of linear rolling guide is little, can bear the power of a plurality of directions or the advantage of moment, thereby the related whole side direction charger of underbeam is suffered restraints, only can upper and lower translation and can not occur tilting.
Alternatively, between the inner surface of the right-hand member of underbeam and right frame slide block-slide track component is installed, further alternatively, slide block is installed in the underbeam right-hand member, and slide rail vertically is installed on the inner surface of right frame.Different with the left side linear rolling guide, the tolerance clearance of the slide block-slide track component here is then bigger, only can limit the skew of forward charger and described side direction charger, play auxiliary spacing and guide effect at the in-plane of forming perpendicular to forward oil cylinder and side direction oil cylinder center line.In addition, from mounting structure as can be seen, side force can not be delivered to right frame by underbeam and slide block-slide track component.
Like this, be installed in linear rolling guide on underbeam and the left frame and cooperate accurately, friction force is little, can bear the power or the moment of a plurality of directions, and only underbeam can be restricted to can upper and lower translation; And the tolerance clearance that is installed in the slide block-slide track component on underbeam and the right frame is bigger, only can limit forward charger and side direction charger perpendicular to the skew on the direction on two planes that side frame constitutes.
Alternatively, on the frame of top, comprise the service hoisting device, for example be separately installed with chain block, thereby can realize the upper-lower position adjustment of forward charger by chain block at its two ends.
Alternatively, the left side of left frame comprises diagonal brace.Because left frame need be strengthened left frame for mainly bearing the fixedly force side of side force.
Load testing machine of the present invention compared with prior art, not only can load forward load and side load simultaneously, and loading procedure is steady, the side direction charger can run-off the straight or clamping stagnation, have simple in structurely in addition, be easy to the characteristics of making and assembling, and have higher security and reliability, thereby can satisfy the needs of various load tests, the performance that is particularly useful for testing the jacking apparatus jacking performance of various VTOL (vertical take off and landing) and bears side force.
Description of drawings
Will can be well understood to characteristics of the present invention and structure more often with reference to the following drawings in the following detailed description, wherein:
Fig. 1 is the skeleton view of load testing machine according to the preferred embodiment of the present invention, has shown the one-piece construction of load testing machine;
Fig. 2 is the partial enlarged view of load testing machine as shown in fig. 1, has shown the structure of side direction charger;
Fig. 3 is the local amplification plan view of the A-A profile line of load testing machine in Fig. 2 as shown in fig. 1.
Embodiment
Come preferred implementation of the present invention is described with reference to appended accompanying drawing below.Should be understood that embodiment disclosed herein only is a preferred version of the present invention, except the disclosed mode, the present invention can also realize with various other forms.
As shown in Figure 1, load testing machine 100 in the preferred embodiment for the present invention mainly comprises support frame 10, forward charger 50 and side direction charger 60, and the dotted portion shown in Fig. 1 is equipments under test with the parts that Reference numeral 90 indicates promptly, not as a part of the present invention.Need to prove, be the aircraft lifting jack though equipment under test 90 adopts in the present embodiment, according to the difference of equipment under test, also can change to other device at an easy rate.
Support frame 10 mainly comprise top frame 11, base 12 and vertically install about two side frames 13,14, they all can be made by for example steel section bar, thereby have very high rigidity and load-bearing capacity.About the bottom expanded formation support shape of two side frames 13,14, thereby improve the stability of whole framework, still can not topple under the situation of top load very even in process of the test, be subjected to.
Further, inboard at two side frames 13,14 of support frame 10, also have two slide rails 18,19 (as clearly shown in Figure 3) respectively, be respectively applied for the slide block 56,58 that is bonded on the forward charger 50, and what form in the left side is to cooperate accurate linear rolling guide, what form on the right side then is the bigger slide block-slide rail of tolerance clearance, realizes the vertical slip of side direction charger 60 with respect to support frame 10, and this will be described in detail in follow-up explanation.
In addition, support frame 10 also comprises some other parts, for example two rows pin-and-hole 15 that vertically distributes and the safety pin 16 that can inject each pin-and-hole 15.Wherein, pin-and-hole 15 vertically is symmetrically distributed on two side frames 13,14 and perpendicular to the plane that is made of two side frames 13,14 and extends.Safety pin 16 in inserting pin-and-hole 15 after, the end is surface one segment distance of outstanding two side frames 13,14 still, thereby as the safe bearing load device, can stop its further whereabouts when forward charger 50 accidents drop.
Further, as clearly shown in Figure 1, roughly between two side frames 13,14 of support frame 10, its primary structure is made of upper beam 52 and forward oil cylinder 53 forward charger 50.
52 horizontal-extendings of wherein putting the beams in place, and its two ends, left and right sides form and are centered around the hollow structure of two side frames, 13,14 peripheries, thus can be so that whole upper beam 52 can be along 13, the 14 in the vertical direction translations of two side frames.On upper beam 52, also has the fixed orifice that to aim at pin-and-hole 15, thereby can be after whole forward charger 50 be moved to required height, pass through the fixed pin that is inserted and will put the beams in place and 52 be fixed on the support frame 10, and provide fixing force side for forward loads by the cooperation between fixed pin 59 and the pin-and-hole 15.
Forward oil cylinder 53 is vertically arranged, as shown in Figure 1, its stiff end passes upper beam 52 and is connected with it in hinged way, its flexible end is then connected with positive force sensor 81 and loading end 57, and be connected with underbeam 64, thereby look from the front, whole forward charger 50 and side direction charger 60 have formed " scholar " font structure.
Structure below with reference to Fig. 2,3 pairs of side direction chargers 60 is described in detail.
As clearly shown in Figure 2, side direction charger 60 mainly comprises underbeam 64, side direction oil cylinder 62, lateral force sensors 82 and adapter sleeve 63.Wherein side direction oil cylinder 62 along continuous straight runs are arranged, its stiff end links to each other with an end of underbeam 64 by a contiguous block, and is bonded on the slide rail 18 by slide block 56 jointly.Adapter sleeve 63 and lateral force sensors 82, side direction oil cylinder 62 are along same straight line, and the one end is connected with the flexible end of lateral force sensors 82, side direction oil cylinder 62, and its other end presents forked, and is socketed on the loading end 57.Like this, the stiff end of side direction oil cylinder 62 is supported on the slide rail 18 of side frame 13 so that the fixedly force side of loading to be provided, and its flexible end applies side load by adapter sleeve 63 to loading end 57.
Underbeam 64 with the 52 identical perpendiculars of putting the beams in place in horizontal-extending, it extends size less than putting the beams in place 52, and is sandwiched in just between two side frames 13,14.On the inner surface of the left end of underbeam 64 and left frame, linear rolling guide is installed, comprises slide block 56 and slide rail 18, make underbeam 64 related whole side direction chargers 60 to slide up and down translation like this along linear rolling guide.As shown in fig. 1, on the inner surface of the right-hand member of underbeam and right frame, slide block 58 and the slide rail 19 that tolerance clearance is bigger each other is installed, can plays the effect of auxiliary guiding.And under underbeam 64, the intersection point place that side direction oil cylinder 62 and forward oil cylinder 53 center lines extend also has the load(ing) point of loading end 57, is used for being connected with equipment under test.
It should be noted that as shown in clear among Fig. 2,3 being connected by bearing pin 71 between loading end 57 and the underbeam 64 realizes.And the shape of cross section of pin-and-hole 72 that is used to connect bearing pin 71 on the underbeam 64 is not identical with the xsect bearing pin of bearing pin 71, but has extended a bit of distance along the loading direction of side load.By such setting, on the one hand can so that side load be loaded into better on the loading end 57, and can not acted on counterforce counteraction on the loading end 57 from the side by underbeam 64, on the other hand, the safe tolerance range that has exceeded loading end 57 and equipment under test if side load is excessive, pivot pin 71 will be with its side against the side of living pin-and-hole 72 after the direction along side load moves a bit of distance so.At this moment; excessive side load will be delivered on the side frame 13 by underbeam 64; thereby practical function can not increase in the load of loading end 57 and exceed the safe tolerance range of loading end 57 and equipment under test, thereby guarantees the security of process of the test, plays certain mistake proofing and protective effect.If only need load the forward test load, then make side direction oil cylinder 62 produce retraction force, at this moment bearing pin 71 is near pin-and-hole 72 left sides, and this position forward oil cylinder 53 just is in vertical position fully, and the retraction force that produces of side direction oil cylinder 62 can not treated trial assembly and buys property and give birth to any influence.
It should be noted that in addition, the cylinder body of described forward oil cylinder 53 52 is connected by articulated manner with putting the beams in place, thereby forward oil cylinder 53 can slightly be swung described loading end can be moved freely on a small quantity along side direction, this also is to be avoided side force to be loaded on the forward oil cylinder 53 mistakenly rather than on the equipment under test, guarantees the measure of effective transmission that side direction loads.
Except above-mentioned major part, load testing machine 100 can also have some complementary parts, for example being supported on the diagonal brace 17 on the side frame 13 and being connected top frame 11 and the chain block 20 between 52 of putting the beams in place shown in Fig. 1.Wherein, diagonal brace 17 is used for further supporting side frame 13, so that the anchorage force of side direction to be provided, avoids that side frame 13 topples under the effect that side direction loads.And a pair of chain block 20 is symmetricly set on the two ends, the left and right sides of top frame 11 and upper beam 52, is used to regulate the vertical height of forward charger 50.Certainly, also can adopt other device and the chain block 20 common position adjustment that realize forward charger 50, for example adopt from the bottom forward charger 50 lifting jack of ejection upwards, after the position of finishing forward charger 50 is adjusted, only lifting jack need be removed and replaces with equipment under test and can carry out load test.
Need to prove in addition, load testing machine 100 also should have hydraulic system, electric control system, electric measurement system supporting with it, thereby form the complete pilot system of a cover, but the structure of these corollary apparatus is discussed no longer in detail, only the related content of testing power value aspect is described further here.
In the process of implementing the side direction loading, the load(ing) point of equipment under test is that described loading end 57 places may produce lateral shift because of lateral forces, thereby the actual loaded force direction of forward oil cylinder 53 can depart from vertical direction, form certain inclination angle, this moment, forward load that equipment under test bore was the vertical component of forward oil cylinder 53 loading forces and making a concerted effort of whole side direction charger 60 gravity, side load be side direction oil cylinder 62 loading forces and forward oil cylinder 53 loading forces cross component force with joint efforts.Therefore, there are deviation in the reading of positive force sensor 81 and lateral force sensors 82 and actual loaded to forward load, the side load of equipment under test.At this moment can revise in real time by the electrohydraulic servo system that hydraulic system, electric control system, electric measurement system are formed, to guarantee the forward load and the side load Pass Test requirement of actual loaded.
In the specific implementation, can estimate the lateral shift at described loading end 57 places to the forward load of actual loaded and the influence degree of side load by calculating, if within the test accuracy claimed range, the side load value that the weight sum of the reading of positive force sensor 81 and the whole side direction charger 60 forward load value that promptly can be used as equipment under test and born then, the reading of lateral force sensors 82 promptly can be used as equipment under test and born.Therefore when test accuracy requires to hang down, can carry out corresponding simplification, to reach the purpose of saving cost to hydraulic pressure and electrical system.

Claims (14)

1. a load testing machine (100) is characterized in that, comprising: support frame (10), forward charger (50) and side direction charger (60); Wherein
Described support frame (10) comprises top frame (11), base (12), vertical two side frames (13,14), forms a closed frame;
Described forward charger (50) is positioned between described two side frames (13,14), and its height can be adjusted up and down along described two side frames (13,14), and has loading end (57) in its bottom;
Described side direction charger (60) is positioned at the below of described forward charger (50), is connected with described loading end (57) and moves up and down with moving of loading end (57).
2. load testing machine as claimed in claim 1 (100), it is characterized in that, described side direction charger (60) comprises underbeam (64), side direction oil cylinder (62), lateral force sensors (82) and adapter sleeve (63), the two ends of wherein said underbeam (64) engage described two side frames (13,14), described loading end (57) is positioned at its middle part, the stiff end of described side direction oil cylinder (62) links to each other with described underbeam (64), its flexible end is connected successively with lateral force sensors (82) and adapter sleeve (63), and finally is connected to the side of described loading end (57).
3. load testing machine as claimed in claim 2 (100), it is characterized in that, described forward charger (50) also comprises upper beam (52) and the forward oil cylinder (53) that mutual square crossing is arranged, described upper beam (52) is connected on described two side frames (13,14) by fixed pin (59), the cylinder body of described forward oil cylinder (53) is connected by articulated manner with described upper beam (52), can swing in perpendicular, its flexible end is connected successively with positive force sensor (81), described loading end (57).
4. load testing machine as claimed in claim 2 (100) is characterized in that, the load(ing) point that combines with equipment under test that is positioned on the described loading end (57) overlaps with the center line extension intersection point of described forward oil cylinder (53) and described side direction oil cylinder (62).
5. load testing machine as claimed in claim 2 (100), it is characterized in that, have bearing pin (71)-pin-and-hole (72) device between described loading end (57) and described underbeam (64), the shape of cross section of described pin-and-hole (72) is greater than the cross sectional shape of described bearing pin (71).
6. load testing machine as claimed in claim 5 (100), it is characterized in that, the shape of cross section of described pin-and-hole (72) is set to, and described loading end (57) is maintained fixed along the forward loading direction with described underbeam (64), and can move a segment distance mutually along the side direction loading direction.
7. as each described load testing machine (100) among the claim 2-6, it is characterized in that described side frame has symmetrically arranged pin-and-hole (15) on (13,14), have the fixed orifice that to aim at described pin-and-hole (15) on the described upper beam (52).
8. load testing machine as claimed in claim 7 (100) is characterized in that, described pin-and-hole (15) is a plurality of, is set to two rows that distribute along side frame (13,14).
9. as each described load testing machine (100) among the claim 1-6, it is characterized in that, described support frame (10) also comprises paired safety pin (16), and it can insert in each described pin-and-hole (15), and the surface of described side frame (13,14) is stretched out at two ends.
10. as each described load testing machine (100) among the claim 3-6, it is characterized in that, between the inner surface of end of described underbeam (64) and pairing side frame (13), linear rolling guide is installed.
11. load testing machine as claimed in claim 10 (100) is characterized in that, between the inner surface of the other end of described underbeam (64) and pairing another side frame (14) slide block-slide track component is installed.
12. as each described load testing machine (100) among the claim 1-6, it is characterized in that, on described top frame (11), comprise the service hoisting device.
13. load testing machine as claimed in claim 12 (100) is characterized in that, described service hoisting device is the chain block (20) that is installed in the two ends of described top frame (11) respectively.
14., it is characterized in that the left side of described left frame (13) comprises diagonal brace (17) as each described load testing machine (100) among the claim 1-6.
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