CN103616303B - Tension and compression and twisting vibration fatigue experimental device - Google Patents
Tension and compression and twisting vibration fatigue experimental device Download PDFInfo
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Abstract
The invention discloses a kind of tension and compression and twisting vibration fatigue experimental device, tension and compression and torsional fatigue test can be completed simultaneously.It comprises test unit stand, twisting test mechanism and Duo Tao tensile compression test mechanism; In tensile compression test mechanism, tension and compression start cylinder piston rod, force snesor, guide rod, adjuster bar and tested workpiece join end to end successively; Adjuster bar is provided with multiple adjustment position, according to the size of tested workpiece, is connected to by guide rod on the corresponding adjustment position of adjuster bar; Guide rod is rectilinear motion under the restriction of guiding mechanism; In twisting test mechanism, the turning end of bearing slew gear is connected with the other end of tested workpiece; Connected by linkage assembly between swing arm in each bearing slew gear, the swing arm being positioned at one end is connected with the piston rod reversing start cylinder further by a linkage assembly.Tension and compression start cylinder, bearing slew gear and torsion start cylinder are all fixed on test unit stand.
Description
Technical field
The present invention relates to material vibrating fatigue test technology field, be specifically related to a kind of adopt compound start cylinder to complete tested material tension and compression and twisting vibration fatigue experimental device.
Background technology
When carrying out torture test to tested workpiece, often require not only to carry out tension and compression vibration fatigue test but also carry out twisting vibration torture test to tested workpiece.In prior art, be that these two kinds of torture tests are separately carried out, only complete a kind of torture test of form at every turn.Because the time of carrying out spent by a torture test is long, therefore existing test method compares wastes time and energy.Be directed to this, the present invention devises a kind of test unit that simultaneously can complete tension and compression and torsional fatigue test.
Summary of the invention
In view of this, the invention provides a kind of tension and compression and twisting vibration fatigue experimental device, tension and compression and torsional fatigue test can be completed simultaneously.
The program is achieved in that
A kind of tension and compression and twisting vibration fatigue experimental device, comprising: test unit stand, twisting test mechanism and N overlap tensile compression test mechanism, N be more than or equal to 2 positive integer;
Mei Tao tensile compression test mechanism comprises tension and compression start cylinder, the first web member, force snesor, the second web member, guiding mechanism, guide rod and adjuster bar; Tension and compression start cylinder is linear motion conversion mechanism, it is arranged on test unit stand, and the piston rod of tension and compression start cylinder is connected with force snesor by the first web member, and force snesor is connected with guide rod by the second web member, guide rod is connected with adjuster bar, and adjuster bar is connected with one end of tested workpiece; Adjuster bar is provided with multiple adjustment position, according to the size of tested workpiece, is connected to by guide rod on the corresponding adjustment position of adjuster bar; Guiding mechanism is fixed on test unit stand, and guide rod is rectilinear motion under the restriction of guiding mechanism; Tension and compression start cylinder, guide rod, adjuster bar and tested workpiece move on the same line, and the straight-line trajectory of different tensile compression test mechanism is parallel to each other;
Twisting test mechanism comprises: N number of bearing slew gear with swing arm, N number of linkage assembly, a torsion start cylinder and the sensor for obtaining tested workpiece windup-degree; Bearing slew gear is linear motion conversion mechanism, and it is fixed on test unit stand, and for the straight line force putting on swing arm being converted to the twisting resistance being applied to turning end, described turning end is connected with the other end of tested workpiece; Connected by linkage assembly between swing arm in each bearing slew gear, the swing arm being positioned at one end is connected with the piston rod reversing start cylinder further by a linkage assembly; Reverse start cylinder to be fixed on test unit stand by bearing.
In order to obtain the torsional moment that tested workpiece is subject to, Mei Tao tensile compression test mechanism comprises torque sensor and the 3rd web member further, adjuster bar (9) is connected with torque sensor (11) one end with tested workpiece (12) by the 3rd web member (10), and adjuster bar (9), the 3rd web member (10), torque sensor (11), tested workpiece (12) connect connected successively.
Wherein, at described guide rod and adjuster bar link, adjuster bar designs the equally spaced pilot hole of a row, and guide rod designs the mounting hole coordinated with pilot hole, and it is inner that guide rod inserts adjuster bar, and mounting hole connects after aiming at selected pilot hole.Preferably, the other end of described adjuster bar is connected with the 3rd web member by screw thread; Adjuster bar is connected with guide rod by any one pilot hole, by regulating the 3rd web member to be threaded with adjuster bar the degree of depth, finely tunes the space shared by tested workpiece.
Beneficial effect:
The test unit adopting the present invention to propose, can complete tension and compression and the twisting vibration torture test of tested workpiece simultaneously, greatly can save test period, improves test efficiency.
Secondly, the present invention adopts the compound start cylinder technology be made up of static(al) cylinder and power cylinder, and this start cylinder loads cylinder by a static loading cylinder and a power and forms, and they share a piston rod.Wherein static loading cylinder completes the static loading of tested workpiece, power loads cylinder and applies cycling alternating load to tested workpiece, when the power that static loading cylinder exports reaches set steady state value, just two chambeies of static loading cylinder are turned off, now the pressure in static loading cylinder two chamber can remain unchanged, even if not for it provides hydraulic energy source, static loading power also can remain unchanged, thus reach the saving energy, reduce the object of heating.
In addition, owing to have employed two refrigeration technique inside and outside in static loading cylinder, greatly reduce due to fricative heat during sealing place high frequency motion, reduce the running temperature of start cylinder, ensure the reliability of high frequency fatigue test, the test of long high frequency can be adapted to.
Accompanying drawing explanation
Fig. 1 is the structural representation of tension and compression and torsional fatigue vibration testing device in embodiment one;
Fig. 2 is the left view of twisting test mechanism;
Fig. 3 is the structural representation of tension and compression and torsional fatigue vibration testing device in embodiment two;
Fig. 4 (a) is a kind of structural profile schematic diagram of compound start cylinder;
Fig. 4 (b) is piston rod, static loading cylinder piston and power loading cylinder piston schematic diagram in Fig. 4 (a);
Fig. 5 is the structural profile schematic diagram of another kind of compound start cylinder;
Fig. 6 is two cold structures of static loading cylinder in compound start cylinder.
1-test unit stand, 2-tension and compression start cylinder, 3-first web member, 4-force snesor, 5-second web member, 6-guiding mechanism, 7-guide rod, 8-pilot hole, 9-adjuster bar, 10-the 3rd web member, 11-torque sensor, the tested workpiece of 12-, 13-bearing slew gear, 14-swing arm, 15-linkage assembly, 16-reverses start cylinder, 17-displacement transducer, 18-second displacement sensor.
2-1 static loading cylinder, 2-11, oilhole on 2-12 static loading cylinder, 2-13 static loading cylinder cylinder body, 2-14 static loading cylinder end cap, 2-2 power loads cylinder, 2-21, 2-22 power loads the oilhole on cylinder, 2-23 power loads cylinder cylinder body, 2-24 power loads cylinder end cap, 2-3 piston rod, 2-31 mozzle, 2-32 fixed connecting piece, 2-33 mozzle support member, 2-34 oil through, 2-35, 2-36 leads to oil groove, 2-37, 2-38 heat eliminating medium gateway, 2-39 seal, 2-4 static loading cylinder piston, 2-5 power loads cylinder piston, 2-6 sound cylinder connects end cap, 2-61 vent port, 2-7 oil inlet pipe, 2-8 scavenge pipe.
Embodiment
To develop simultaneously embodiment below in conjunction with accompanying drawing, describe the present invention.
Embodiment one
Fig. 1 is the structural representation of the present embodiment tension and compression and torsional fatigue vibration testing device, it comprises test unit stand 1,3 and overlaps tensile compression test mechanism and 1 cover twisting test mechanism, the present embodiment only with 3 stations as an example, in practice can the more station with spatial design as required.The present embodiment can complete tension and compression and the torsional fatigue vibration test of three tested workpiece simultaneously.
As shown in Figure 1, Mei Tao tensile compression test mechanism comprises tension and compression start cylinder 2, first web member 3, force snesor 4, second web member 5, guiding mechanism 6, guide rod 7 and adjuster bar 9.
Wherein, tension and compression start cylinder 2 is linear motion conversion mechanisms, it is arranged on test unit stand 1, the piston rod of tension and compression start cylinder 2 is connected with force snesor 4 by the first web member 3, force snesor 4 is connected with guide rod 7 by the second web member 5, guide rod 7 is connected with adjuster bar 9, and adjuster bar 9 is connected with one end of tested workpiece 12.Tension and compression start cylinder 2, guide rod 7, adjuster bar 9 and tested workpiece 12 move on the same line, and the straight-line trajectory of different tensile compression test mechanism is parallel to each other.
Test unit stand 1 is designed with guiding mechanism 6, and guide rod 7 can only carry out rectilinear motion under the restriction of guiding mechanism 6, like this with regard to can ensure above-mentioned motion carry out stretching out or retraction movement time, can move along its axial direction, and not produce side force.Guiding mechanism 6 can adopt an orienting lug with U-shaped groove to realize, and U-shaped groove is guide rail.
Adjuster bar 9 is for regulating the space shared by tested workpiece 12, and adjuster bar 9 is provided with multiple adjustment position, according to the size of tested workpiece 12, is connected to by guide rod 7 on the corresponding adjustment position of adjuster bar 9.In the present embodiment, as shown in Figure 1, at guide rod 7 and adjuster bar 9 link, adjuster bar 9 designs the equally spaced pilot hole 8 of a row, guide rod 7 designs the mounting hole coordinated with pilot hole, and it is inner that guide rod 7 inserts adjuster bar 9, and mounting hole connects after aiming at selected pilot hole.
Twisting test mechanism comprises: 3 15, one, bearing slew gear 13,3 linkage assemblys with swing arm 14 reverse start cylinder 16 and the sensor for obtaining tested workpiece windup-degree.Fig. 2 is the left view that Fig. 1 removes tensile compression test mechanism retrotorsion test mechanism.Bearing slew gear 13 is linear motion conversion mechanisms, and it is fixed on test unit stand 1, and for the straight line force putting on swing arm 14 being converted to the twisting resistance being applied to turning end, described turning end is connected with the other end of tested workpiece 12; Connected by linkage assembly 15 between swing arm 14 in each bearing slew gear, the swing arm 14 being positioned at one end is connected with the piston rod reversing start cylinder 16 further by a linkage assembly 15; Reverse start cylinder 16 to be fixed on test unit stand 1 by bearing.When reversing start cylinder 16 and stretching, this rectilinear motion is delivered on each swing arm 14 by linkage assembly 15, is converted to twisting resistance is applied on tested workpiece by bearing slew gear.In the present embodiment, sensor for obtaining tested workpiece windup-degree can adopt the displacement transducer 17 being arranged at and reversing start cylinder 16, by the windup-degree obtaining tested workpiece that converts, also can angular transducer be directly set in practice and directly measures.During owing to carrying out pressure and moment of torsion control, need to know applied pressure size and windup-degree, therefore force snesor and the sensor for angle measurement are necessary.
If need to detect the deformation that tested workpiece produces under applied pressure, further second displacement sensor 18 is set on tension and compression start cylinder 2.
By controlling direction of motion and the motion frequency of tension and compression start cylinder 2 piston rod, tested workpiece 12 just can be driven to produce corresponding movement tendency, thus tested workpiece 12 is applied to pulling force or the pressure of corresponding frequencies, the size that tension and compression start cylinder 2 is applied to pulling force on tested workpiece 12 or pressure is measured in the effect of force snesor 4, and measure under the effect of this pulling force or pressure by the second displacement sensor 18 be arranged on tension and compression start cylinder 2, the displacement that piston rod produces, this displacement is the deformation size that tested workpiece 12 occurs.
By controlling motion frequency and the motion amplitude of the piston rod reversing start cylinder 16, just can produce the rotary motion of corresponding frequencies by linkage assembly 15 and swing arm 14 with dynamic bearing slew gear 13, thus make tested workpiece 12 that the twisting motion of corresponding frequencies occur.The displacement size of the piston rod reversing start cylinder 16 can be measured by being arranged on the displacement transducer 17 reversed on start cylinder 16, when the length of swing arm 14 is known, the angle of the rotation of bearing slew gear 13 just can be calculated according to the measured value of displacement transducer 17, thus obtaining the windup-degree of tested workpiece 12 generation, the torsional moment produced under this windup-degree then can be calculated by the product reversed between the power output of start cylinder 16 and its torque arm length.Subtract each other after the power output reversing start cylinder 16 is multiplied by the working area in two chambeies respectively by the pressure in two chambeies and obtain.The length of the arm of force is the vertical range of tie point to swing arm 14 centre of gyration of torsion start cylinder 16 and swing arm 14.
Embodiment two
As shown in Figure 3, the present embodiment is the improvement to embodiment one.In the present embodiment, in order to monitor the torsional moment produced under applied windup-degree, add the 3rd web member 10 and torque sensor 11, adjuster bar 9 is connected with torque sensor 11 one end with tested workpiece 12 by the 3rd web member 10, and adjuster bar 9, the 3rd web member 10, torque sensor 11, tested workpiece 12 connect connected successively.
In addition, the present embodiment also improves adjuster bar 9.As shown in Figure 3, at the equally spaced pilot hole 8 of one end of adjuster bar 9 design one row, the screw that the other end is provided by screw thread and the 3rd web member 10 is connected.Adjuster bar 9 is connected with guide rod 7 by any one pilot hole 8, to be threaded with adjuster bar 9 degree of depth by regulating the 3rd web member 10, finely tune the space shared by tested workpiece 12, thus regulate the installing space of tested workpiece 12, to meet the installation requirement of the tested workpiece of different length.When above-mentioned fine setting still can not meet the demands, the pilot hole that adjuster bar 9 uses can be changed, the installing space of tested workpiece can be regulated further.In practice, also can on guide rod 7 Design Orientation hole 8, adjuster bar 9 is connected with guide rod 7 by any one pilot hole.
Embodiment three
In pressure torture test, apply an invariable static(al) usually first to tested workpiece, then superpose an alternating force on this basis again.In prior art, tension and compression start cylinder 2 adopts a hydraulic actuation cylinder to carry out above-mentioned test usually, because the test period of carrying out needed for torture test is longer, therefore the consumed energy is very large, and start cylinder can produce a large amount of heats working long hours, cause seal to damage, piston rod weares and teares.
Therefore the tension and compression start cylinder 2 of the present embodiment adopts compound start cylinder.This compound start cylinder is that static loading cylinder and power load cylinder set all-in-one-piece structure, and as shown in Fig. 4 (a), it comprises static loading cylinder 2-1 and the power loading cylinder 2-2 of coaxial connection.The inner chamber that static loading cylinder 2-1 and power load cylinder 2-2 is communicated with by piston hole, and two oil cylinders share a piston rod 2-3.
The two ends of piston rod 2-3 reach outside for being connected test specimen from static loading cylinder 2-1 with end cap 2-14,2-24 that power loads cylinder 2-2 respectively, and in this test unit, the piston rod stretched out from static loading cylinder 2-1 side connects the first web member 3.Piston rod 2-3 is multidiameter, and as Fig. 4 (b), its thick section is provided with static loading cylinder piston 2-4, and thin segment is provided with power and loads cylinder piston 2-5, and two-piston lays respectively in the cylinder body of two oil cylinders.Conveniently install, static loading cylinder piston 2-4 and multidiameter integrally process, and power is embedded on piston rod after loading cylinder piston 2-5, forms double-piston.
Static loading cylinder 2-1 is arranged two for passing in and out oilhole 2-11,2-12 of oil, during loading, by passing into the pressure oil of setting value to static loading cylinder 2-1 thus applying axial static pulling force or static pressure to test specimen; Wherein, when carrying out pressure test to test specimen, oilhole 2-11 is oil-in, and oilhole 2-12 is drain tap, when carrying out tensile test to test specimen, and oppositely logical oil.Power loads on cylinder 2-2 and also arranges two for passing in and out oilhole 2-21,2-22 of oil, during loading, is superimposed on static(al) by leading to oil alternately to two oilholes of power loading cylinder 2-2 thus apply axial alternating force to test specimen.When the power that static loading cylinder exports reaches set steady state value, just two chambeies of static loading cylinder can also be turned off, now the pressure in static loading cylinder two chamber can remain unchanged, even if not for it provides hydraulic energy source, static loading power also can remain unchanged, thus reach the saving energy, reduce the object of heating.
Effective working area of static loading cylinder piston 2-4 determines jointly by test specimen loading static(al) size and charge oil pressure, and effective working area that power loads cylinder piston 2-5 determines jointly by test specimen loading alternating force size and charge oil pressure.
In Fig. 4 (a), the connecting portion that static loading cylinder 2-1 and power load cylinder 2-2 adopts a conventional end cover structure, is just designed to bilateral structure.Fig. 5 shows one preferably embodiment, and as shown in Figure 5, static loading cylinder 2-1 connects end cap 2-6 by sound cylinder and connects power loading cylinder 2-2.It is the cylinder body with size two piston holes that sound cylinder connects end cap 2-6, two piston holes adapt with the thick section of multidiameter and the diameter of thin segment respectively, the stepped portion of multidiameter is positioned at sound cylinder and connects end cap 2-6 chamber, and this design is convenient to the processing of connection and each parts.Cause air pressure change because stepped portion connects athletic meeting in end cap at sound cylinder, therefore connect on end cap 2-6 sidewall at sound cylinder further and vent port 2-61 is set.One of them oilhole of static loading cylinder can be arranged at sound cylinder and connect in end cap 2-6.
The piston hole place that sound connects on end cap 2-6, static loading cylinder and power loading cylinder end cap is equipped with seal 2-39.Because in static(al) cylinder, fluid does not flow substantially, piston rod produces high temperature at seal place, fragile piston rod and seal under high-frequency high-speed motion, thus reduces equipment life.For this reason, the present invention is the two-way cooling structure in static loading cylinder partial design further, comprises piston rod cooling structure and cylinder body cooling structure.Fig. 6 shows the schematic diagram of two-way cooling structure, only depicts static loading cylinder part in figure.
As shown in Figure 6, piston rod cooling structure is arranged at the thick section of piston rod, and the thick section of piston rod 2-3 is hollow structure, and mozzle 2-31 is housed in this hollow structure, and this mozzle can adopt stainless-steel tube; One end of mozzle 2-31 is communicated with outside, import and export A for one as heat eliminating medium, the mozzle 2-31 other end is communicated with the cavity of hollow structure, as can be seen from the figure, mozzle 2-31 does not reach the bottom of piston rod hollow structure, thus is communicated with the hollow structure of piston rod in space in the pipe of mozzle 2-31.Water conservancy diversion gap is left between the tube wall of mozzle 2-31 and the sidewall of hollow structure; Adopt fixed connecting piece 2-32 by described water conservancy diversion gap and extraneous seal isolation, while fixed connecting piece 2-32 also play the effect be fixed on by mozzle on piston axle.The sidewall that piston rod 2-3 stretches out compound start cylinder one end offers through hole, imports and exports B as another of heat eliminating medium.The scavenge pipe 2-8 of these import and export B connection outside, aforesaid import and export A connects outside oil inlet pipe 2-7, and heat eliminating medium carries out the cooling of piston axle by mozzle inside, described water conservancy diversion gap and import and export B after entering piston rod from import and export A successively.Heat eliminating medium can adopt cold oil.
If mozzle 2-31 is longer, in order to ensure its steadiness, can also arrange one or more mozzle support member 2-33 in water conservancy diversion gap, this mozzle support member 2-33 is provided with flow-guiding channel, ensures the flowing of heat eliminating medium.Multiple mozzle support member 2-33 is distributed in described water conservancy diversion gap.
Cylinder body cooling structure is arranged on the cylinder body of static loading cylinder.Specifically, in static loading cylinder 2-1 sidewall, axially have multiple oil through 2-34, the axle center of oil through can with static loading cylinder body axis parallel, thus be convenient to processing, and multiple oil through 2-34 circumference is distributed in static loading cylinder 2-1 sidewall.An annular groove is offered respectively as logical oil groove 2-35,2-36 towards the one side of inner chamber of cylinder block at former and later two end caps of static loading cylinder, two logical oil groove 2-35,2-36 are communicated with by oil through 2-34, each logical oil groove place all offers one and is communicated with this logical oil groove and outside heat eliminating medium gateway 2-37,2-38, these two heat eliminating medium gateways connect oil inlet pipe 2-7 and scavenge pipe 2-8 respectively, after heat eliminating medium enters from the logical oil groove of static loading cylinder side, the logical oil groove flowing into opposite side via oil through is discharged, thus realizes the cooling of static loading cylinder.
The present invention, by the two cooling bodies with fluid, leaves the heat that seal place produces, ensure that the reliability of equipment long-time running.
In sum, these are only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. tension and compression and a twisting vibration fatigue experimental device, is characterized in that, comprising: test unit stand (1), twisting test mechanism and N overlap tensile compression test mechanism, N be more than or equal to 2 positive integer;
Mei Tao tensile compression test mechanism comprises tension and compression start cylinder (2), the first web member (3), force snesor (4), the second web member (5), guiding mechanism (6), guide rod (7) and adjuster bar (9); Tension and compression start cylinder (2) is linear movement cylinder, it is arranged on test unit stand (1), the piston rod of tension and compression start cylinder (2) is connected with force snesor (4) by the first web member (3), force snesor (4) is connected with guide rod (7) by the second web member (5), guide rod (7) is connected with adjuster bar (9), and adjuster bar (9) is connected with one end of tested workpiece (12); Adjuster bar (9) is provided with multiple adjustment position, according to the size of tested workpiece (12), is connected to by guide rod (7) on the corresponding adjustment position of adjuster bar (9); Guiding mechanism (6) is fixed on test unit stand (1), guide rod (7) rectilinear motion under the restriction of guiding mechanism (6); Tension and compression start cylinder (2), guide rod (7), adjuster bar (9) and tested workpiece (12) move on the same line, and the straight-line trajectory of different tensile compression test mechanism is parallel to each other;
Twisting test mechanism comprises: N number of with the bearing slew gear (13) of swing arm (14), N number of linkage assembly (15), torsion start cylinder (16) and the sensor for obtaining tested workpiece windup-degree; Bearing slew gear (13) is linear motion conversion mechanism, it is fixed on test unit stand (1), for the straight line force putting on swing arm (14) is converted to the twisting resistance being applied to turning end, described turning end is connected with the other end of tested workpiece (12); By linkage assembly (15) series connection between swing arm (14) in each bearing slew gear, the swing arm (14) being positioned at one end is connected with the piston rod reversing start cylinder (16) further by a linkage assembly (15); Reverse start cylinder (16) to be fixed on test unit stand (1) by bearing.
2. device as claimed in claim 1, it is characterized in that, at described guide rod (7) and adjuster bar (9) link, equally spaced pilot hole (8) is arranged in the upper design one of adjuster bar (9), the mounting hole coordinated with pilot hole is above designed at guide rod (7), it is inner that guide rod (7) inserts adjuster bar (9), and mounting hole connects after aiming at selected pilot hole.
3. device as claimed in claim 1, it is characterized in that, Mei Tao tensile compression test mechanism comprises torque sensor (11) and the 3rd web member (10) further, adjuster bar (9) is connected with torque sensor (11) one end with tested workpiece (12) by the 3rd web member (10), and adjuster bar (9), the 3rd web member (10), torque sensor (11), tested workpiece (12) connect connected successively.
4. device as claimed in claim 3, is characterized in that, one end design one equally spaced pilot hole of row (8) of described adjuster bar (9), and the other end is connected with the 3rd web member (10) by screw thread; Adjuster bar (9) is connected with guide rod (7) by any one pilot hole, by regulating the 3rd web member (10) to be threaded with adjuster bar (9) degree of depth, finely tune the space shared by tested workpiece (12).
5. device as claimed in claim 1, it is characterized in that, this device comprises the second displacement sensor (18) for obtaining tension and compression start cylinder (2) piston displacement being arranged at tension and compression start cylinder (2) further.
6. the device as described in claim 1 to 5 any one, it is characterized in that, described tension and compression start cylinder (2) adopts compound start cylinder, it comprises static loading cylinder (2-1) and power loading cylinder (2-2) of coaxial connection, two load cylinder shares a piston rod (2-3), the end cap that the two ends of piston rod (2-3) load cylinder (2-2) from static loading cylinder (2-1) and power respectively stretches out, and the piston rod stretched out from static loading cylinder (2-1) connects the first web member (3); Piston rod (2-3) is multidiameter, and thick section is provided with static loading cylinder piston (2-4), and thin segment is provided with power and loads cylinder piston (2-5), and two-piston lays respectively at static loading cylinder and power loads in the cylinder body of cylinder; Static loading cylinder (2-1) and power load on cylinder (2-2) and arrange two respectively for passing in and out the oilhole of oil.
7. device as claimed in claim 6, is characterized in that, static loading cylinder (2-1) connects end cap (2-6) by sound cylinder and connects power loading cylinder (2-2); Sound cylinder connects end cap (2-6) for having the cylinder body of size two piston holes, and the stepped portion of multidiameter is positioned at sound cylinder and connects end cap (2-6) chamber; Sound cylinder connects end cap (2-6) sidewall and is provided with vent port.
8. device as claimed in claim 6, it is characterized in that, the thick section of described piston rod (2-3) is provided with piston rod cooling structure further; Specifically, the thick section of piston rod (2-3) is hollow structure, mozzle (2-31) is housed in this hollow structure, one end of mozzle (2-31) is communicated with outside, as import and export of heat eliminating medium, mozzle (2-31) other end is communicated with hollow structure, leaves water conservancy diversion gap between the tube wall of mozzle (2-31) and the sidewall of hollow structure; Adopt fixed connecting piece (2-32) by described water conservancy diversion gap and extraneous seal isolation; The sidewall that piston rod (2-3) stretches out compound start cylinder one end offers through hole, imports and exports as another of heat eliminating medium.
9. device as claimed in claim 8, is characterized in that, the cylinder body of described static loading cylinder (2-1) is provided with cylinder body cooling structure further; Specifically, axially multiple oil through (2-34) is had in static loading cylinder (2-1) sidewall, a logical oil groove (2-35,2-36) is offered respectively towards the one side of inner chamber of cylinder block at former and later two end caps of static loading cylinder, two logical oil grooves (2-35,2-36) are communicated with by oil through (2-34), and each logical oil groove place all offers one and is communicated with this logical oil groove and outside heat eliminating medium gateway.
10. device as claimed in claim 9, it is characterized in that, the axle center of described oil through (2-34) and static loading cylinder body axis parallel, and multiple oil through (2-34) circumference is distributed in static loading cylinder (2-1) sidewall; Described logical oil groove is annular groove.
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