CN114151415A - Hydraulic cylinder test bench and hydraulic system - Google Patents

Abstract

The invention discloses a hydraulic cylinder test board and a hydraulic system, wherein the hydraulic cylinder test board comprises a support, an adjusting component and a first box body, the adjusting component is arranged on the support and is suitable for being connected with one end of a tested hydraulic cylinder and used for adjusting the position of the tested hydraulic cylinder, the first box body is arranged on the support, the first box body and the adjusting component are arranged at intervals along the length direction of the support and opposite to each other, one side of the first box body, facing the adjusting component, is suitable for being connected with the other end of the tested hydraulic cylinder, the hydraulic cylinder can drive the first box body to move on the support along the length direction of the support, and a balance weight is suitable for being placed in the first box body so as to increase the weight of the first box body. The hydraulic cylinder test board has the advantages of small volume, low cost, simple structure and the like.

Description

Hydraulic cylinder test bench and hydraulic system

Technical Field

The invention relates to a fully mechanized mining hydraulic support upright post, in particular to a hydraulic cylinder test bench and a hydraulic system.

Background

The hydraulic cylinder is used as an execution element of a hydraulic system and is key equipment of a hydraulic support of a fully mechanized mining face, the pushing hydraulic cylinder can control the positions of the hydraulic support and a scraper conveyor, and the pushing hydraulic cylinder plays a key role in the three-machine cooperative operation of the hydraulic support, the scraper conveyor and a coal mining machine.

In the related art, the test bed for the hydraulic cylinder cannot simulate the action of disturbance forces in different directions on the hydraulic cylinder in a real environment, and the error of an experimental result is large.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

Therefore, the embodiment of the invention provides the hydraulic cylinder test bench which is simple in structure, capable of simulating the action of disturbance force in different directions on the hydraulic cylinder in a real environment and accurate in experimental result.

The embodiment of the invention provides a hydraulic system for a hydraulic cylinder test bench, which is low in cost and simple in structure.

The hydraulic cylinder test bench according to the embodiment of the invention comprises: a support; the adjusting assembly is arranged on the support and is suitable for being connected with one end of a tested hydraulic cylinder and used for adjusting the position of the tested hydraulic cylinder; the first box body is arranged on the support, the first box body and the adjusting assembly are arranged oppositely at intervals along the length direction of the support, one side of the first box body, which faces the adjusting assembly, is suitable for being connected with the other end of the tested hydraulic cylinder, the hydraulic cylinder can drive the first box body to move along the length direction of the support on the support, and a balance weight is suitable for being placed in the first box body so as to increase the weight of the first box body.

According to the hydraulic cylinder test board provided by the embodiment of the invention, through the arrangement of the adjusting component and the first box body, the working environment of the tested hydraulic cylinder can be truly simulated, the experimental error is reduced, and the accuracy of the experimental result is improved.

In some embodiments, the adjustment assembly comprises: the second box body is arranged on the support, and an opening is formed in one side, facing the first box body, of the second box body; the first plate and the second plate are arranged in the second box body, one end of the first plate is arranged on the support and can move in the width direction relative to the support, one end of the second plate is arranged on one side of the first plate, the second plate can move in the height direction relative to the support, and the second plate is connected with the other end of the tested hydraulic cylinder; the first guide rail is arranged in the second box body, the first guide rail extends along the width direction of the support, and the first plate is movably arranged on the first guide rail; the second guide rail is arranged on the side surface, facing the second plate, of the first plate, extends along the height direction of the support, and one end of the second plate is movably arranged on the second guide rail; at least part of the first driving hydraulic cylinder penetrates through the second box body, and one end of the first driving hydraulic cylinder is connected with the first plate so as to drive the first plate to move; and at least part of the second driving hydraulic cylinder penetrates through the second box body, and one end of the second driving hydraulic cylinder is suitable for driving the second plate to move.

In some embodiments, the adjustment assembly further comprises: the third plate is arranged in the second box body, the third plate and the second plate are arranged in parallel at intervals along the height direction of the support, the third plate is movable in the width direction relative to the support, and the second driving hydraulic cylinder is connected with the third plate so that the second driving hydraulic cylinder drives the second plate to move through the third plate; the third guide rail is arranged on one side, facing the third plate, of the second plate, extends along the width direction of the support, and the third plate is movably arranged on the second guide rail, or the third guide rail is arranged on one side, facing the second plate, of the third plate, and the second plate is movably arranged on the third guide rail.

In some embodiments, the first box body has a first side surface and a second side surface which are arranged oppositely in the width direction of the bracket, the first side surface and the second side surface are provided with the first slide rail and the second slide rail, the first slide rail is provided on the first side surface, the second slide rail is provided on the second side surface, the first slide rail and the second slide rail both extend along the length direction of the bracket, the bracket is provided with a first sliding groove and a second sliding groove, the first sliding groove and the second sliding groove are oppositely arranged at intervals along the width direction of the bracket, the first slide rail is movably fitted in the first sliding groove, and the second slide rail is movably fitted in the second sliding groove; the hydraulic cylinder test bench further comprises a first compaction hydraulic cylinder and a second compaction hydraulic cylinder, the first compaction hydraulic cylinder is arranged on the support, and at least part of the first compaction hydraulic cylinder is arranged in the first sliding groove and is suitable for being matched with the first sliding rail in a stop manner so as to adjust the pressure between the first sliding rail and the first sliding groove; the second pressing hydraulic cylinder is arranged on the support, at least part of the second pressing hydraulic cylinder penetrates through the second sliding groove and is suitable for being matched with the second sliding rail in a stop-abutting mode, and therefore pressure between the second sliding rail and the second sliding groove can be adjusted.

In some embodiments, the hydraulic cylinder test stand further comprises: the first roller is rotatably arranged at one end, facing the first sliding rail, of the first pressing hydraulic cylinder, and is suitable for being in abutting fit with the first sliding rail; the second roller is rotatably arranged at one end, facing the second sliding rail, of the second pressing hydraulic cylinder and is suitable for being in abutting fit with the second sliding rail.

In some embodiments, the rack is provided with a first cooling channel extending along the length direction of the rack, the first cooling channel is located below the first sliding chute, the first cooling channel is provided with a first liquid inlet and a first liquid outlet so that cooling liquid can circulate in the first cooling channel through the first liquid inlet and the first liquid outlet, the rack is provided with a second cooling channel extending along the length direction of the rack, the second cooling channel is provided below the second sliding chute, and the second cooling channel is provided with a second liquid inlet and a second liquid outlet so that the cooling liquid can circulate in the second cooling channel through the second liquid inlet and the second liquid outlet; the hydraulic cylinder test bench further comprises a cooling assembly, the first liquid outlet and the second liquid outlet are connected with the liquid inlet of the cooling assembly, and the first liquid inlet and the second liquid inlet are connected with the liquid outlet of the cooling assembly, so that cooling liquid in the first cooling channel and cooling liquid in the first cooling channel can flow in a circulating mode through the cooling assembly.

In some embodiments, the hydraulic cylinder test stand further comprises a weighing assembly disposed between the bracket and the first box for weighing the first box.

The hydraulic system for the hydraulic cylinder test bench according to the embodiment of the invention comprises: the hydraulic cylinder test bench comprises a hydraulic cylinder test bench, a pump station and a hydraulic cylinder, wherein the pump station is used for providing hydraulic oil for the hydraulic cylinder test bench, and the hydraulic cylinder test bench is any one of the hydraulic cylinder test benches in the embodiments; one end of the first interface group is communicated with the pump station, and the other end of the first interface group is communicated with the hydraulic cylinder test bench, so that hydraulic oil can circularly flow between the hydraulic cylinder test bench and the pump station through the first interface group; one end of the second interface group is communicated with the hydraulic cylinder test board; the liquid return tank is communicated with the other end of the second interface group, so that the hydraulic oil can circularly flow between the hydraulic cylinder test bench and the liquid return tank through the second interface group; the pressure detection assembly is arranged between the first interface group and the hydraulic cylinder test bench and between the second interface group and the hydraulic cylinder test bench.

In some embodiments, the first interface group comprises: the first interface is respectively communicated with the pump station and one end of a second driving hydraulic cylinder of the hydraulic cylinder test bench, so that hydraulic oil can circularly flow between the pump station and the second driving hydraulic cylinder through the first interface; the second interface is respectively communicated with the pump station and one end of a first driving hydraulic cylinder of the hydraulic cylinder test bench, so that the hydraulic oil can circularly flow between the pump station and the first driving hydraulic cylinder through the second interface; the third interface is respectively communicated with the pump station, and the other end of the third interface is respectively communicated with one end of the first pressing hydraulic cylinder of the hydraulic cylinder test bench and one end of the second pressing hydraulic cylinder of the hydraulic cylinder test bench, so that the hydraulic oil can circularly flow among the pump station, the first pressing group and the second pressing hydraulic cylinder through the third interface; the fourth interface is respectively communicated with the pump station, and the other end of the fourth interface is suitable for being communicated with one end of the tested oil cylinder, so that the hydraulic oil can circularly flow between the pump station and the tested oil cylinder through the fourth interface; the first interface, the second interface, the third interface and the fourth interface are all provided with a throttle valve and an overflow valve; the second interface, the third interface and the fourth interface are all provided with hydraulic control one-way valves.

In some embodiments, the second interface group comprises: the fifth interface is respectively communicated with the liquid return tank and the other end of the second driving hydraulic cylinder, so that the hydraulic oil can circularly flow between the second driving hydraulic cylinder and the liquid return tank through the fifth interface; the bidirectional hydraulic lock is respectively communicated with the first interface and the second interface so as to control the stroke of the second driving hydraulic cylinder; the sixth interface is respectively communicated with the liquid return tank and the other end of the first driving hydraulic cylinder, so that the hydraulic oil can respectively circulate between the first driving hydraulic cylinder and the liquid return tank through the sixth interface; one end of the seventh interface is communicated with the liquid return tank, and the other end of the seventh interface is respectively communicated with the other end of the first pressing hydraulic cylinder and the other end of the second pressing hydraulic cylinder, so that the hydraulic oil can circularly flow among the first pressing hydraulic cylinder, the second pressing hydraulic cylinder and the liquid return tank through the seventh interface; one end of the eighth interface is communicated with the liquid return tank, and the other end of the eighth interface is suitable for being communicated with the other end of the tested oil cylinder, so that the hydraulic oil can circularly flow between the tested oil cylinder and the liquid return tank through the eighth interface; and the fifth interface, the sixth interface, the seventh interface and the eighth interface are provided with a liquid return circuit breaker valve and a safety valve.

In some embodiments, the pressure detection assembly comprises: the first pressure sensors are respectively arranged at the second interface and the sixth interface, and are used for detecting the pressure in the first driving hydraulic cylinder so as to adjust the thrust force applied to the tested hydraulic cylinder; the second pressure sensors are respectively arranged at the third interface and the seventh interface and are used for detecting the pressure of the first pressing hydraulic cylinder and the second pressing hydraulic cylinder so as to adjust the pressure between the first box body and the support; and the third pressure sensors are respectively arranged on the fourth interface, the eighth interface and the tested hydraulic cylinder, and are used for detecting the pressure of the fourth interface, the eighth interface and the tested hydraulic cylinder so as to accurately control and control the stroke of the tested hydraulic cylinder.

Drawings

Fig. 1 is a perspective view of a hydraulic cylinder test stand according to an embodiment of the present invention.

Fig. 2 is a front view of a hydraulic cylinder test stand according to an embodiment of the present invention.

Fig. 3 is a left side view of the hydraulic cylinder test stand of the embodiment of the present invention with the second case removed.

Fig. 4 is a perspective view of the hydraulic cylinder test stand according to the embodiment of the present invention with the second case removed and the first chute removed.

Fig. 5 is a right side view of a hydraulic cylinder test stand according to an embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a hydraulic system for a hydraulic cylinder test stand according to an embodiment of the present invention.

Reference numerals:

a hydraulic cylinder test stand 100;

a hydraulic system 10 for a hydraulic cylinder test bench;

a bracket 1; a first chute 11; a second chute 12; a first cooling channel 13; a first liquid inlet 131; a first liquid outlet 132; a second cooling channel 14; a second liquid inlet 141; a second liquid outlet 142;

an adjusting component 2; a first plate 21; a second plate 22; a first connection plate 221; a third plate 23; a first drive hydraulic cylinder 24; a second drive hydraulic cylinder 25; a second tank 26; a first guide rail 27; a second guide rail 28; a third guide rail 29;

a first case 3; a second connecting plate 31; a first side 32; a second side 33; a first slide rail 34; a second slide rail 35;

a tested hydraulic cylinder 4; a first hold-down hydraulic cylinder 5; a first roller 51; a second hold-down hydraulic cylinder 6;

a pump station 7;

a first interface group 8; a first interface 81; a second interface 82; a third interface 83; a fourth interface 84; a throttle valve 85; an overflow valve 86; a pilot operated check valve 87;

a second interface group 9; a fifth interface 91; a bi-directional hydraulic lock 911; a sixth interface 92; a seventh interface 93; an eighth interface 94; a liquid return shut-off valve 95; a relief valve 96;

a liquid return tank 101;

a pressure sensing assembly 102; a first pressure sensor 1021;

a second pressure sensor 1022;

a third pressure sensor 1023;

a power supply control system 103; a diverter valve system 104; a reserved port 105.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

A hydraulic cylinder test stand according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

As shown in fig. 1 to 5, the hydraulic cylinder test bench according to the embodiment of the present invention includes a stand 1, an adjustment assembly 2, and a first tank 3.

The adjusting component 2 is arranged on the bracket 1, and the adjusting component 2 is suitable for being connected with one end of the tested hydraulic cylinder 4 and used for adjusting the position of the tested hydraulic cylinder 4. Specifically, as shown in fig. 1-2, the adjusting assembly 2 is disposed on the left side of the bracket 1, the adjusting assembly 2 is provided with a first connecting plate 221, and the base of the measured hydraulic cylinder 4 is connected to the first connecting plate 221 through a fastener, whereby the adjusting assembly 2 adjusts the position of the base of the measured hydraulic cylinder 4.

The first box 3 is arranged on the support 1, the first box 3 and the adjusting component 2 are arranged at intervals and oppositely along the length direction (left and right direction as shown in fig. 1-2) of the support 1, one side of the first box 3 facing the adjusting component 2 is suitable for being connected with the other end of the tested hydraulic cylinder 4, the hydraulic cylinder can drive the first box 3 to move on the support 1 along the length direction (left and right direction as shown in fig. 1-2) of the support 1, and a balance weight is suitable for being placed in the first box 3 so as to increase the weight of the first box 3. Specifically, as shown in fig. 1-2, the first box 3 is movably disposed on the bracket 1 and located on the right side of the adjusting assembly 2, the left side of the first box 3 is provided with a second connecting plate 31, and an ear ring of a piston rod of the measured hydraulic cylinder 4 is connected to the second connecting plate 31 through a fastener, so that the measured hydraulic cylinder 4 is disposed between the adjusting assembly 2 and the first box 3, and a counterweight can be disposed in the first box 3, the counterweight can be a weight, a weight, or the like, and the weight of the first box 3 is changed by adding or reducing the counterweight.

According to the hydraulic cylinder test bench 100 provided by the embodiment of the invention, the first box body 3 is pushed to move through the telescopic motion of the tested hydraulic cylinder 4 through the arrangement of the first box body 3, when the tested hydraulic cylinder 4 stops injecting oil, the first box body 3 continues to move forwards due to the fact that the first box body 3 has inertia left and right, so that the real working environment of the hydraulic cylinder is simulated, the experimental error is reduced, and the accuracy of the experimental result is improved.

In some embodiments, the adjusting assembly 2 includes a first plate 21 and a second plate 22, one end of the first plate 21 is provided on the bracket 1 and is movable in a width direction (front-back direction, as shown in fig. 1-2) of the bracket 1, one end of the second plate 22 is provided on one side of the first plate 21, the second plate 22 is movable in a height direction (up-down direction, as shown in fig. 1-2) of the bracket 1, and the second plate 22 is connected to one end of the hydraulic cylinder 4 to be measured.

Specifically, as shown in fig. 1-2, the first plate 21 is disposed on the bracket 1 and can move in the front-back direction, so as to drive the second plate 22 to move in the front-back direction, the second plate 22 is movably disposed on the first plate 21 and can move in the up-down direction, the first connecting plate 221 is disposed on the second plate 22, the base of the hydraulic cylinder 4 to be tested is connected to the first connecting plate 221, the position of the hydraulic cylinder 4 to be tested is adjusted by the front-back movement of the first plate 21 and the up-down movement of the second plate 22, so as to apply loads in different directions to the hydraulic cylinder 4 to be tested, so as to simulate the real stress state of the hydraulic cylinder 4 to be tested, and then data acquisition is performed on the pressure, stroke and flow rate of the hydraulic cylinder 4 to be tested in the real state, so as to design the control strategy of the hydraulic cylinder 4 to be tested.

In some embodiments, the adjustment assembly 2 further includes a second housing 26, a first rail 27, a second rail 28, a first drive cylinder 24, and a second drive cylinder 25.

The second box 26 is disposed on the bracket 1, an opening (not shown) is disposed on a side of the second box 26 facing the first box 3, and the first plate 21 and the second plate 22 are disposed in the second box 26. Specifically, as shown in fig. 1-2 and 4, the second case 26 is fixed to the bracket 1, an opening is provided on the right side of the second case 26, the first plate 21 and the second plate 22 are provided in the second case 26, and the first connecting member is connected to the hydraulic cylinder 4 to be tested at least partially through the opening.

A first rail 27 is provided on the inside of the second casing 26, the first rail 27 extends in the width direction (the front-rear direction as shown in fig. 1-2) of the rack 1, and the first plate 21 is movably provided on the first rail 27. The first rail 27 is provided on the bottom surface of the second casing 26, the first rail 27 extends in the front-rear direction and the bottom surface of the first plate 21 is movably provided on the first rail 27, whereby the first plate 21 smoothly moves in the front-rear direction.

The second rail 28 is provided on the side of the first plate 21 facing the second plate 22, the second rail 28 extending in the height direction (up and down direction as shown in fig. 1-2) of the rack 1, and one end of the second plate 22 is movably provided on the second rail 28. Specifically, as shown in fig. 3 to 4, the second rail 28 extends in the up-down direction and is provided on the front side surface of the first plate 21, and one end of the second plate 22 is movably provided on the second rail 28, whereby the second plate 22 smoothly moves in the up-down direction on the first plate 21.

At least a part of the first driving hydraulic cylinder 24 is arranged in the second box 26 in a penetrating way, and one end of the first driving hydraulic cylinder 24 is connected with the first plate 21 to drive the first plate 21 to move. A second drive cylinder 25 is at least partially disposed through the second housing 26, one end of the second drive cylinder 25 being adapted to drive the second plate 22 in motion. Specifically, as shown in fig. 3 to 4, the first driving hydraulic cylinder 24 and the second driving hydraulic cylinder 25 are both hydraulic telescopic rods, the base of the first driving hydraulic cylinder 24 is disposed on the front side surface of the second box 26, the base of the second driving hydraulic cylinder 25 is disposed on the upper side surface of the second box 26, the piston rod of the first driving hydraulic cylinder 24 and the piston rod of the second driving hydraulic cylinder 25 are located in the second box 26, the piston rod of the first driving hydraulic cylinder 24 is connected to the first plate 21, so as to drive the first plate 21 to move in the front-rear direction, and the piston rod of the second driving hydraulic cylinder 25 is connected to the second plate 22, so as to drive the second plate 22 to move in the up-down direction.

It will be appreciated that the first and second drive hydraulic cylinders 24 and 25 are not limited thereto, and for example, the first and second drive hydraulic cylinders 24 and 25 may also be electric telescopic rods, hydraulic cylinders, pneumatic cylinders, or the like.

In some embodiments, adjustment assembly 2 further includes a third plate 23 and a third rail 29.

A third plate 23 is provided in the second case 26, the third plate 23 is disposed in parallel with the second plate 22 at an interval in the height direction (up-down direction as shown in fig. 1-2) of the carrier 1, the third plate 23 is movable in the width direction of the carrier 1, and a second driving hydraulic cylinder 25 is connected to the third plate 23 so that the second driving hydraulic cylinder 25 drives the second plate 22 to move through the third plate 23. Specifically, as shown in fig. 3 to 4, the third plate 23 is disposed in the second box 26, the length of the third plate 23 is smaller than that of the second plate 22, the third plate 23 is movably located above the second plate 22 and can move synchronously with the second plate 22 in the up-down direction, the upper end of the third plate 23 is connected to the piston rod of the second driving hydraulic cylinder 25, and when the second plate 22 moves back and forth, the third plate 23 can maintain its original position, so as to prevent the second plate 22 from interfering with the second driving hydraulic cylinder 25 when moving back and forth, thereby enabling the adjustment assembly 2 to be disposed more reasonably.

It will be understood that the arrangement of the third plate 23 and the second guide rail 28 is not limited thereto, and for example, the upper surface of the second plate 22 is provided with a slide groove, and the piston rod of the second drive cylinder 25 is provided with a slider movably fitted in the slide groove.

In some embodiments, the third guide rail 29 is provided on the side of the second plate 22 facing the third plate 23, the third guide rail 29 extends in the width direction (front-rear direction as shown in fig. 1-2) of the bracket 1, the third plate 23 is movably provided on the third guide rail 29, or the third guide rail 29 is provided on the side of the third plate 23 facing the second plate 22, and the second plate 22 is movably provided on the third guide rail 29. Specifically, as shown in fig. 3 to 4, a third guide rail 29 extending in the front-rear direction is provided below the third plate 23, and the third guide rail 29 is engaged with the upper side surface of the second plate 22, or a third guide rail 29 extending in the front-rear direction is provided above the second plate 22, and the third guide rail 29 is engaged with the lower side surface of the third plate 23, thereby preventing the third plate 23 from moving in the front-rear direction with the second plate 22.

In some embodiments, the first box 3 includes a first side surface 32 and a second side surface 33 arranged opposite to each other in a width direction (a front-back direction as shown in fig. 1-2) of the rack 1, the first side surface 32 and the second side surface 33, the hydraulic cylinder test bench 100 further includes a first slide rail 34 and a second slide rail 35, the first slide rail 34 is disposed on the first side surface 32, the second slide rail 35 is disposed on the second side surface 33, and both the first slide rail 34 and the second slide rail 35 extend along a length direction (a left-right direction as shown in fig. 1-2) of the rack 1. Specifically, as shown in fig. 5, the front side of the first box 3 is a first side 32, the rear side of the second box 26 is a second side 33, the first slide rail 34 is disposed on the first side 32 and located at the lower end of the first side 32, and the second slide rail 35 is disposed on the second side 33 and located at the lower end of the second side 33.

The bracket 1 is provided with a first sliding groove 11 and a second sliding groove 12, the first sliding groove 11 and the second sliding groove 12 are oppositely arranged at intervals along the width direction (as shown in fig. 1-2, the front and back direction) of the bracket 1, the first sliding rail 34 is movably matched in the first sliding groove 11, and the second sliding rail 35 is movably matched in the second sliding groove 12. Specifically, as shown in fig. 1-2, the first sliding chute 11 and the second sliding chute 12 are arranged at an interval in the front-rear direction, the opening of the first sliding chute 11 is arranged toward the rear side, the opening of the second sliding chute 12 is arranged toward the front side, the opening of the first sliding chute 11 is opposite to the opening of the second sliding chute 12 in the front-rear direction, the first sliding rail 34 is movably inserted into the first sliding chute 11, and the second sliding rail 35 is movably inserted into the second sliding chute 12, so that the first box 3 smoothly slides on the bracket 1 due to the cooperation of the first sliding chute 11 and the first sliding rail 34 and the cooperation of the second sliding rail 35 and the second sliding chute 12.

In some embodiments, the hydraulic cylinder test stand 100 further comprises a first hold-down hydraulic cylinder 5 and a second hold-down hydraulic cylinder 6.

The first hydraulic pressing cylinder 5 is arranged on the bracket 1, and at least part of the first hydraulic pressing cylinder 5 is arranged in the first sliding groove 11 and is suitable for being matched with the first sliding rail 34 in a stop manner, so that the pressure between the first sliding rail 34 and the first sliding groove 11 can be adjusted. The second hydraulic pressing cylinder 6 is arranged on the bracket 1, and at least part of the second hydraulic pressing cylinder 6 penetrates through the second sliding groove 12 and is suitable for being matched with the second sliding rail 35 in a stop manner, so that the pressure between the second sliding rail 35 and the second sliding groove 12 can be adjusted. Specifically, as shown in fig. 3-4, the first pressing hydraulic cylinder 5 and the second pressing hydraulic cylinder 6 are hydraulic cylinders, the base of the first pressing hydraulic cylinder 5 and the base of the second pressing hydraulic cylinder 6 are arranged on the support 1, the piston rod of the first pressing hydraulic cylinder 5 is in butt fit with the first slide rail 34, the piston rod of the second pressing hydraulic cylinder 6 is in butt fit with the second slide rail 35, when the weight in the first box 3 is insufficient, the first pressing hydraulic cylinder 5 and the second pressing hydraulic cylinder 6 can be driven to press the first slide rail 34 and the second slide rail 35, and therefore the weight of the first box 3 is increased.

In some embodiments, the number of the first pressing cylinders 5 and the number of the second pressing cylinders 6 are plural, the plural first pressing cylinders 5 are arranged at intervals along the length direction (left and right direction as shown in fig. 1-2) of the bracket 1, and the plural second pressing cylinders 6 are arranged at intervals along the length direction (left and right direction as shown in fig. 1-2) of the bracket 1. Specifically, as shown in fig. 4-5, the number of the first hydraulic cylinders 5 is two (two are shown in the drawing), the number of the second hydraulic cylinders 6 is two (two are shown in the drawing), the two first hydraulic cylinders 5 are arranged on the support 1 at intervals in the left-right direction and are located above the first sliding grooves 11, the two second hydraulic cylinders 6 are arranged on the support 1 at intervals in the left-right direction and are located above the second sliding grooves 12, and therefore, the stress of the box body in the front-back left-right direction is uniform through the two first hydraulic cylinders 5 and the two second hydraulic cylinders 6, the problem that the error of the measurement result is large due to the fact that the stress of one side of the first box body 3 is nonuniform is avoided, and therefore the hydraulic cylinder test board 100 is more reasonable in arrangement.

It is to be understood that the first and second pressing hydraulic cylinders 5 and 6 are not limited thereto, and for example, the first and second pressing hydraulic cylinders 5 and 6 may also be electric telescopic rods, hydraulic cylinders, pneumatic cylinders, or the like.

In some embodiments, hydraulic cylinder test stand 100 further comprises first roller 51 and second roller 61.

The first roller 51 is rotatably disposed at an end of the first holding-down hydraulic cylinder 5 facing the first slide rail 34, and the first roller 51 is adapted to be in abutting engagement with the first slide rail 34. The second roller 61 is rotatably disposed at an end of the second pressing hydraulic cylinder 6 facing the second slide rail 35, and the second roller 61 is adapted to be in abutting engagement with the second slide rail 35. Specifically, as shown in fig. 4, the first roller 51 is rotatably disposed at the lower end of the piston rod of the first hold-down hydraulic cylinder 5, the second roller 61 is rotatably disposed at the lower end of the piston rod, the first roller 51 is in abutting engagement with the first slide rail 34, the second roller 61 is in abutting engagement with the second slide rail 35, when the first slide rail 34 slides in the first sliding slot 11, the first roller 51 can rotate on the first slide rail 34, so as to reduce wear of the first slide rail 34 and prolong the service life of the first slide rail 34, and when the second slide rail 35 slides in the second sliding slot 12, the second roller can rotate on the second slide rail 35, so as to reduce wear of the second slide rail 35 and prolong the service life of the second slide rail 35.

When the first slide rail 34 slides in the first slide groove 11 and the second slide rail 35 slides in the second slide groove 12, a large amount of heat will be generated between the first slide rail 34 and the first slide groove 11, and a large amount of heat will be generated between the second slide groove 12 and the second slide rail 35, which will cause the first slide rail 34, the first slide groove 11, the second slide rail 35 and the second slide groove 12 to be thermally deformed in severe cases, and affect the reduction of the service life of the first slide rail 34, the first slide groove 11, the second slide rail 35 and the second slide groove 12. Therefore, in some embodiments, the bracket 1 is provided with a first cooling channel 13 extending along the length direction (left-right direction as shown in fig. 3-4) of the bracket, the first cooling channel 13 is disposed below the first chute 11, and the first cooling channel 13 has a first liquid inlet 131 and a first liquid outlet 132, so that the cooling liquid circulates in the first cooling channel 13 through the first liquid inlet 131 and the first liquid outlet 132.

Specifically, as shown in fig. 4 to 5, the first cooling channel 13 is disposed below the first sliding chute 11, a first partition plate is disposed in the first cooling channel 13, an upper end and a lower end of the first partition plate are respectively connected to upper and lower sides of the first cooling channel 13, a right end of the first partition plate (not shown in the figures) is connected to a right side surface of the first cooling channel 13, a left side surface of the first partition plate is spaced from a left side surface of the first cooling channel 13, so that the first cooling channel 13 is divided into a first cavity and a second cavity by the first partition plate, the first liquid inlet 131 and the first liquid outlet 132 are disposed on the right side surface of the first cooling channel 13, the first liquid inlet 131 is communicated with the first cavity, and the first liquid outlet 132 is communicated with the second cavity, so that the cooling liquid can flow from the first cavity to the second cavity, and the cooling liquid can fill the whole first cooling channel 13 to cool the first sliding chute 11 and the first sliding rail 34, the cooling efficiency of the cooling liquid is improved.

The rack 1 is provided with a second cooling channel 14 extending along the length direction (left-right direction as shown in fig. 1-2) of the rack, the second cooling channel 14 is disposed below the second chute 12, and the second cooling channel 14 has a second liquid inlet 141 and a second liquid outlet 142, so that the cooling liquid can circulate in the second cooling channel 14 through the second liquid inlet 141 and the second liquid outlet 142.

Specifically, as shown in fig. 4 to 5, the second cooling channel 14 is disposed below the second sliding chute 12, a second partition (not shown) is disposed in the second cooling channel 14, an upper end and a lower end of the second partition are respectively connected to upper and lower sides of the second cooling channel 14, a right end of the second partition is connected to a right side surface of the second cooling channel 14, a left side surface of the second partition is spaced from a left side surface of the second cooling channel 14, so that the second cooling channel 14 is divided into a third cavity and a fourth cavity by the second partition, a second inlet 141 and a second outlet 142 are disposed on the right side surface of the second cooling channel 14, the second inlet 141 is communicated with the third cavity, and the second outlet 142 is communicated with the fourth cavity, so that the cooling liquid can flow from the third cavity to the fourth cavity, and the cooling liquid can fill the entire second cooling channel 14 to cool the second sliding chute 12 and the second sliding rail 35, the cooling efficiency of the cooling liquid is improved.

In some embodiments, the hydraulic cylinder test bench 100 further comprises a cooling assembly (not shown), the first liquid outlet 132 and the second liquid outlet 142 are connected to a liquid inlet of the cooling assembly, and the first liquid inlet 131 and the second liquid inlet 141 are connected to a liquid outlet of the cooling assembly, so that the cooling liquid in the first cooling channel 13 and the cooling liquid in the first cooling channel 13 circulate through the cooling assembly. Therefore, the cooling assembly cools the cooling liquid in the first cooling channel 13 and the second cooling channel 14, the cooling assembly improves the cooling efficiency of the cooling liquid, and the first sliding chute 11, the second sliding chute 12, the first sliding rail 34 and the second sliding rail 35 are further prevented from being deformed by heat.

In some embodiments, the hydraulic cylinder test bench 100 further comprises a weighing assembly (not shown in the figures) arranged between the stand 1 and the first box 3 for weighing the first box 3. From this, the subassembly of weighing weighs first box 3 to make the experimental result more accurate.

In some embodiments, the hydraulic cylinder testing station 100 further comprises a third driving member (not shown), one end of the third driving member is rotatably disposed on the support 1, the other end of the third driving member is adapted to be connected to the first box 3, and the third driving member can drive the first box 3 to move on the support 1 so as to adjust the distance between the first box 3 and the adjusting assembly 2. Specifically, the third driving piece is hydraulic telescoping rod, and hydraulic telescoping rod's base articulates on support 1, and hydraulic telescoping rod's piston rod articulates on first box 3, when changing by survey hydraulic cylinder 4, opens the third driving piece to adjust the distance between adjusting part 2 and the first box 3, conveniently change and install by survey hydraulic cylinder 4.

It will be appreciated that the third drive member is not limited thereto, for example the third drive member may also be an electrically powered telescopic rod, a hydraulic ram, a pneumatic cylinder or the like.

As shown in fig. 6, the hydraulic system 10 for a hydraulic cylinder test bench according to the embodiment of the present invention includes a pump station 7, a first interface group 8, a second interface group 9, a liquid return tank 101, and a pressure detection assembly 102.

The pump station 7 is used for providing hydraulic oil for the hydraulic cylinder test bench, and the hydraulic cylinder test bench is any one hydraulic cylinder test bench in the above-mentioned embodiment.

One end of the first interface group 8 is communicated with the pump station 7, and the other end of the first interface group 8 is communicated with the hydraulic cylinder test bench, so that hydraulic oil can circularly flow between the hydraulic cylinder test bench and the pump station 7 through the first interface group 8. Specifically, one end of the first interface group 8 is connected with the pump station 7, and the other end of the first interface group 8 is connected with the rodless cavity of the hydraulic cylinder test bench, so that the pump station 7 supplies oil to the rodless cavity of the hydraulic cylinder test bench through the first interface group 8, and the hydraulic cylinder moves in a telescopic mode.

One end of the second interface group 9 is communicated with the hydraulic cylinder test bench.

The return tank 101 communicates with the other end of the second port group 9 so that hydraulic oil circulates between the hydraulic cylinder test stand and the return tank 101 through the second port group 9. Specifically, one end of the second interface group 9 is connected with the liquid return tank 101, and the other end of the second interface group 9 is connected with the rod cavity of the hydraulic cylinder test bench, so that the pump station 7 supplies oil to the rod cavity of the hydraulic cylinder test bench through the first interface group 8, and the hydraulic cylinder performs telescopic motion.

The pressure detection assemblies 102 are arranged between the first interface group 8 and the hydraulic cylinder test bench and between the second interface group 9 and the hydraulic cylinder test bench.

According to the hydraulic system 10 for the hydraulic cylinder test bench, disclosed by the embodiment of the invention, the pump station 7, the first interface group 8, the second interface group 9, the liquid return tank 101 and the pressure detection assembly 102 are arranged, so that oil is supplied to the hydraulic cylinder test bench, pressure information is acquired through detection of the pressure detection assembly 102, and the accuracy of an experimental result of the hydraulic cylinder test bench is ensured.

In some embodiments, as shown in fig. 6, the first interface group 8 includes a first interface 81, a second interface 82, a third interface 83, and a fourth interface 84.

The first port 81 is communicated with the pump station 7 and one end of the second driving hydraulic cylinder 25 of the hydraulic cylinder test stand, respectively, so that the hydraulic oil circulates between the pump station 7 and the second driving hydraulic cylinder 25 through the first port 81. Specifically, one end of the first interface 81 is connected to the pump station 7, the other end of the first interface 81 is connected to the rodless cavity of the second driving hydraulic cylinder 25, when the second driving hydraulic cylinder 25 extends, the pump station 7 conveys hydraulic oil to the rodless cavity of the second driving hydraulic cylinder 25 through the first interface 81, and when the second driving hydraulic cylinder 25 contracts, the hydraulic oil in the rodless cavity of the second driving hydraulic cylinder 25 returns to the pump station 7 through the first interface 81.

The second port 82 communicates with the pump station 7 and one end of the first drive cylinder 24 of the cylinder test stand, respectively, so that hydraulic oil circulates between the pump station 7 and the first drive cylinder 24 through the second port 82. Specifically, one end of the second port 82 is connected to the pump station 7, and the other end of the second port 82 is connected to the rodless cavity of the first driving hydraulic cylinder 24, when the first driving hydraulic cylinder 24 extends, the pump station 7 conveys hydraulic oil to the rodless cavity of the first driving hydraulic cylinder 24 through the second port 82, and when the first driving hydraulic cylinder 24 contracts, the hydraulic oil in the rodless cavity of the first driving hydraulic cylinder 24 returns to the pump station 7 through the second port 82.

The third ports 83 are respectively communicated with the pump stations 7, and the other ends of the third ports 83 are respectively communicated with one ends of the first pressing hydraulic cylinders 5 of the hydraulic cylinder test tables and one ends of the second pressing hydraulic cylinders 6 of the hydraulic cylinder test tables, so that hydraulic oil circularly flows among the pump stations 7, the first pressing groups and the second pressing hydraulic cylinders 6 through the third ports 83. Specifically, one end of the third interface 83 is connected to the pump station 7, the other end of the third interface 83 is connected to the rodless cavity of the first pressing hydraulic cylinder 5 and the rodless cavity of the second pressing hydraulic cylinder 6, when the first pressing hydraulic cylinder 5 and the second pressing hydraulic cylinder 6 extend, the pump station 7 conveys hydraulic oil to the rodless cavity of the first pressing hydraulic cylinder 5 and the rodless cavity of the second pressing hydraulic cylinder 6 through the third interface 83, and when the first pressing hydraulic cylinder 5 and the second pressing hydraulic cylinder 6 contract, the hydraulic oil in the rodless cavity of the first pressing hydraulic cylinder 5 and the hydraulic oil in the rodless cavity of the second pressing hydraulic cylinder 6 return to the pump station 7 through the third interface 83.

The fourth ports 84 are respectively communicated with the pump stations 7, and the other end of the fourth port 84 is suitable for being communicated with one end of the tested oil cylinder, so that hydraulic oil can circularly flow between the pump stations 7 and the tested oil cylinder through the fourth ports 84. Specifically, one end of the fourth interface 84 is connected to the pump station 7, the other end of the fourth interface 84 is connected to the rodless cavity of the measured cylinder, when the measured cylinder extends, the pump station 7 conveys hydraulic oil to the rodless cavity of the measured cylinder through the fourth interface 84, and when the measured cylinder contracts, the hydraulic oil in the rodless cavity of the measured cylinder returns to the pump station 7 through the fourth interface 84.

The first port 81, the second port 82, the third port 83 and the fourth port 84 are provided with a throttle valve 85 and a relief valve 86. Thereby, the pressure and flow rate of the hydraulic oil in the first port 81, the second port 82, the third port 83, and the fourth port 84 are adjusted by the throttle valve 85 and the relief valve 86.

The second port 82, the third port 83 and the fourth port 84 are all provided with a pilot-controlled check valve 87. Thus, the strokes of the first drive hydraulic cylinder 24, the first hold-down hydraulic cylinder 5, the second hold-down hydraulic cylinder 6, and the cylinder to be measured are controlled by the pilot operated check valve 87.

In some embodiments, as shown in fig. 6, the second port set 9 includes a fifth port 91, a bidirectional hydraulic lock 911, a sixth port 92, a seventh port 93, and an eighth port 94.

The fifth port 91 communicates with the return tank 101 and the other end of the second drive cylinder 25, respectively, so that the hydraulic oil circulates between the second drive cylinder 25 and the return tank 101 through the fifth port 91. Specifically, one end of the fifth port 91 is connected to the liquid return tank 101, the other end of the fifth port 91 is connected to the rod cavity of the second driving hydraulic cylinder 25, when the second driving hydraulic cylinder 25 extends, hydraulic oil in the rod cavity of the second driving hydraulic cylinder 25 is conveyed to the liquid return tank 101 through the fifth port 91, and when the second driving hydraulic cylinder 25 contracts, the liquid return tank 101 conveys hydraulic oil to the rod cavity of the second driving hydraulic cylinder 25 through the fifth port 91.

The two-way hydraulic lock 911 is communicated with the first port 81 and the second port 82, respectively, so as to control the stroke of the second drive cylinder 25. Thereby, the stroke of the second drive cylinder 25 is controlled by the bidirectional hydraulic lock 911.

The sixth port 92 communicates with the return tank 101 and the other end of the first drive cylinder 24, respectively, so that hydraulic oil circulates between the first drive cylinder 24 and the return tank 101 through the sixth port 92, respectively. Specifically, one end of the sixth port 92 is connected to the return tank 101, and the other end of the sixth port 92 is connected to the rod chamber of the first driving hydraulic cylinder 24, so that when the first driving hydraulic cylinder 24 extends, the hydraulic oil in the rod chamber of the first driving hydraulic cylinder 24 is delivered to the return tank 101 through the sixth port 92, and when the first driving hydraulic cylinder 24 contracts, the return tank 101 delivers the hydraulic oil to the rod chamber of the second driving hydraulic cylinder 25 through the sixth port 92.

One end of the seventh port 93 is communicated with the liquid return tank 101, and the other end of the seventh port 93 is communicated with the other end of the first pressing hydraulic cylinder 5 and the other end of the second pressing hydraulic cylinder 6, so that hydraulic oil circularly flows among the first pressing hydraulic cylinder 5, the second pressing hydraulic cylinder 6 and the liquid return tank 101 through the seventh port 93. Specifically, one end of the seventh port 93 is connected to the liquid return tank 101, the other end of the seventh port 93 is connected to the rod cavity of the first hold-down hydraulic cylinder 5 and the rod cavity of the second hold-down hydraulic cylinder 6, when the first hold-down hydraulic cylinder 5 and the second hold-down hydraulic cylinder 6 extend, the hydraulic oil in the rod cavity of the first hold-down hydraulic cylinder 5 and the hydraulic oil in the rod cavity of the second hold-down hydraulic cylinder 6 are delivered to the liquid return tank 101 through the seventh port 93, and when the first hold-down hydraulic cylinder 5 and the second hold-down hydraulic cylinder 6 contract, the liquid return tank 101 delivers the hydraulic oil to the rod cavity of the first hold-down hydraulic cylinder 5 and the rod cavity of the second hold-down hydraulic cylinder 6 through the seventh port 93.

One end of the eighth port 94 is communicated with the liquid return tank 101, and the other end of the eighth port 94 is suitable for being communicated with the other end of the tested oil cylinder, so that the hydraulic oil can circularly flow between the tested oil cylinder and the liquid return tank 101 through the eighth port 94. Specifically, one end of the eighth interface 94 is connected to the liquid return tank 101, the other end of the eighth interface 94 is connected to the rod cavity of the measured cylinder, when the measured cylinder extends, the hydraulic oil in the rod cavity of the measured cylinder is conveyed to the liquid return tank 101 through the eighth interface 94, and when the measured cylinder contracts, the liquid return tank 101 conveys the hydraulic oil to the rod cavity of the measured cylinder through the eighth interface 94.

The fifth port 91, the sixth port 92, the seventh port 93 and the eighth port 94 are provided with a liquid return shutoff valve 95 and a relief valve 96. Specifically, the relief valve 96 includes a first relief valve 96 and a second relief valve 96, and the fifth port 91, the sixth port 92, the seventh port 93, and the eighth port 94 are each provided with the first relief valve 96 and the second relief valve 96, whereby the fifth port 91, the sixth port 92, the seventh port 93, and the eighth port 94 are protected from the liquid path overpressure by the liquid-return cut-off valve 95 and the first relief valve 96 and the second relief valve 96.

In some embodiments, as shown in fig. 6, the pressure detection assembly 102 includes a plurality of first pressure sensors 1021, a plurality of second pressure sensors 1022, and a plurality of third pressure sensors 1023.

A plurality of first pressure sensors 1021 are respectively arranged at the second interface 82 and the sixth interface 92, and the first pressure sensors 1021 are used for detecting the pressure in the first driving hydraulic cylinder 24 to adjust the thrust received by the tested hydraulic cylinder 4. Specifically, the first pressure sensor 1021 includes a first pressure sensor a provided at the second port 82 and a first pressure sensor b provided at the sixth port 92, so that the pressures in the rod chamber and the rodless chamber of the first driving hydraulic cylinder 24 are detected by the first pressure sensor a and the first pressure sensor b, thereby detecting the side thrust of the first driving hydraulic cylinder 24 received by the measured hydraulic cylinder 4.

A plurality of second pressure sensors 1022 are respectively provided at the third port 83 and the seventh port 93, and the second pressure sensors 1022 are used to detect the pressures of the first and second hold-down cylinders 5 and 6 to adjust the pressure between the first tank and the bracket. Specifically, the second pressure sensor 1022 includes a second pressure sensor a and a second pressure sensor b, the second pressure sensor a is provided at the third port 83, the second pressure sensor b is provided at the seventh port 93, and the pressures in the rod chamber and the rodless chamber of the first hold-down hydraulic cylinder 5 and the pressures in the rod chamber and the rodless chamber of the second hold-down hydraulic cylinder 6 are detected by the second pressure sensor a and the second pressure sensor b, so that the pressures of the first hold-down hydraulic cylinder 5 and the second hold-down hydraulic cylinder 6 on the bracket are detected.

A plurality of third pressure sensors 1023 are respectively arranged on the fourth interface 84, the eighth interface 94 and the tested hydraulic cylinder 4, and the third pressure sensors 1023 are used for detecting the pressure of the fourth interface 84, the eighth interface 94 and the tested hydraulic cylinder 4 so as to accurately control and control the stroke of the tested hydraulic cylinder 4. Specifically, the plurality of third pressure sensors 1023 include a third pressure sensor a, a third pressure sensor b, a third pressure sensor c and a third pressure sensor d, the third pressure sensor a is disposed at the fourth port 84, the third pressure sensor b is disposed at the eighth port 94, the third pressure sensor c is disposed at the rod cavity of the hydraulic cylinder 4 to be tested, and the third pressure sensor d is disposed at the rodless cavity of the hydraulic cylinder 4 to be tested, so that pressure is collected by the third pressure sensor a, the third pressure sensor b, the third pressure sensor c and the third pressure sensor d, and time compensation is performed according to the relation between pressure and flow, thereby controlling the hydraulic cylinder to extend to a position where the hydraulic cylinder is to extend, and improving the detection result of the hydraulic cylinder testing table.

The hydraulic system 10 for the hydraulic cylinder test bench further comprises a plurality of reserved ports 105, and when the first interface group 8 or the second interface group 9 is damaged or blocked, the reserved ports 105 can be used for working.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" and the like mean that a specific feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A hydraulic cylinder testboard which is characterized by comprising:

a support;

the adjusting assembly is arranged on the support and is suitable for being connected with one end of a tested hydraulic cylinder and used for adjusting the position of the tested hydraulic cylinder;

the first box body is arranged on the support, the first box body and the adjusting assembly are arranged oppositely at intervals along the length direction of the support, one side of the first box body, which faces the adjusting assembly, is suitable for being connected with the other end of the tested hydraulic cylinder, the hydraulic cylinder can drive the first box body to move along the length direction of the support on the support, and a balance weight is suitable for being placed in the first box body so as to increase the weight of the first box body.

2. The hydraulic cylinder test bench of claim 1, wherein the adjustment assembly comprises:

the second box body is arranged on the support, and an opening is formed in one side, facing the first box body, of the second box body;

the first plate and the second plate are arranged in the second box body, one end of the first plate is arranged on the support and can move in the width direction relative to the support, one end of the second plate is arranged on one side of the first plate, the second plate can move in the height direction relative to the support, and the second plate is connected with the other end of the tested hydraulic cylinder;

the first guide rail is arranged in the second box body, the first guide rail extends along the width direction of the support, and the first plate is movably arranged on the first guide rail;

the second guide rail is arranged on the side surface, facing the second plate, of the first plate, extends along the height direction of the support, and one end of the second plate is movably arranged on the second guide rail;

at least part of the first driving hydraulic cylinder penetrates through the second box body, and one end of the first driving hydraulic cylinder is connected with the first plate so as to drive the first plate to move;

and at least part of the second driving hydraulic cylinder penetrates through the second box body, and one end of the second driving hydraulic cylinder is suitable for driving the second plate to move.

3. The hydraulic cylinder test bench of claim 2, wherein the adjustment assembly further comprises:

the third plate is arranged in the second box body, the third plate and the second plate are arranged in parallel at intervals along the height direction of the support, the third plate is movable in the width direction relative to the support, and the second driving hydraulic cylinder is connected with the third plate so that the second driving hydraulic cylinder drives the second plate to move through the third plate;

the third guide rail is arranged on one side, facing the third plate, of the second plate, extends along the width direction of the support, and the third plate is movably arranged on the second guide rail, or the third guide rail is arranged on one side, facing the second plate, of the third plate, and the second plate is movably arranged on the third guide rail.

4. The hydraulic cylinder test bench of claim 1, wherein the first box body has a first side surface and a second side surface which are arranged oppositely in the width direction of the support, the first side surface and the second side surface are provided with the first slide rail and the second slide rail, the first slide rail is arranged on the first side surface, the second slide rail is arranged on the second side surface, the first slide rail and the second slide rail both extend along the length direction of the support,

the bracket is provided with a first sliding groove and a second sliding groove, the first sliding groove and the second sliding groove are oppositely arranged at intervals along the width direction of the bracket, the first sliding rail is movably matched in the first sliding groove, and the second sliding rail is movably matched in the second sliding groove;

the hydraulic cylinder test bench further comprises a first compaction hydraulic cylinder and a second compaction hydraulic cylinder, the first compaction hydraulic cylinder is arranged on the support, and at least part of the first compaction hydraulic cylinder is arranged in the first sliding groove and is suitable for being matched with the first sliding rail in a stop manner so as to adjust the pressure between the first sliding rail and the first sliding groove;

the second pressing hydraulic cylinder is arranged on the support, at least part of the second pressing hydraulic cylinder penetrates through the second sliding groove and is suitable for being matched with the second sliding rail in a stop-abutting mode, and therefore pressure between the second sliding rail and the second sliding groove can be adjusted.

5. The hydraulic cylinder test bench of claim 4, further comprising:

the first roller is rotatably arranged at one end, facing the first sliding rail, of the first pressing hydraulic cylinder, and is suitable for being in abutting fit with the first sliding rail;

the second roller is rotatably arranged at one end, facing the second sliding rail, of the second pressing hydraulic cylinder and is suitable for being in abutting fit with the second sliding rail.

6. The hydraulic cylinder test bench according to claim 4, wherein the support is provided with a first cooling channel extending along a length direction thereof, the first cooling channel is located below the first chute, the first cooling channel has a first liquid inlet and a first liquid outlet, so that a cooling liquid circulates in the first cooling channel through the first liquid inlet and the first liquid outlet,

the bracket is provided with a second cooling channel extending along the length direction of the bracket, the second cooling channel is arranged below the second sliding chute and is provided with a second liquid inlet and a second liquid outlet, so that the cooling liquid can circularly flow in the second cooling channel through the second liquid inlet and the second liquid outlet;

the hydraulic cylinder test bench further comprises a cooling assembly, the first liquid outlet and the second liquid outlet are connected with the liquid inlet of the cooling assembly, and the first liquid inlet and the second liquid inlet are connected with the liquid outlet of the cooling assembly, so that cooling liquid in the first cooling channel and cooling liquid in the first cooling channel can flow in a circulating mode through the cooling assembly.

7. The utility model provides a hydraulic system for pneumatic cylinder testboard which characterized in that includes:

the hydraulic cylinder test bench is characterized by comprising a pump station, a hydraulic cylinder test bench and a hydraulic cylinder test bench, wherein the pump station is used for providing hydraulic oil for the hydraulic cylinder test bench, and the hydraulic cylinder test bench is the hydraulic cylinder test bench in any one of claims 1-6;

one end of the first interface group is communicated with the pump station, and the other end of the first interface group is communicated with the hydraulic cylinder test bench, so that hydraulic oil can circularly flow between the hydraulic cylinder test bench and the pump station through the first interface group;

one end of the second interface group is communicated with the hydraulic cylinder test board;

the liquid return tank is communicated with the other end of the second interface group, so that the hydraulic oil can circularly flow between the hydraulic cylinder test bench and the liquid return tank through the second interface group;

the pressure detection assembly is arranged between the first interface group and the hydraulic cylinder test bench and between the second interface group and the hydraulic cylinder test bench.

8. The hydraulic system of claim 7, wherein the first interface group comprises:

the first interface is respectively communicated with the pump station and one end of a second driving hydraulic cylinder of the hydraulic cylinder test bench, so that hydraulic oil can circularly flow between the pump station and the second driving hydraulic cylinder through the first interface;

the second interface is respectively communicated with the pump station and one end of a first driving hydraulic cylinder of the hydraulic cylinder test bench, so that the hydraulic oil can circularly flow between the pump station and the first driving hydraulic cylinder through the second interface;

the third interface is respectively communicated with the pump station, and the other end of the third interface is respectively communicated with one end of the first pressing hydraulic cylinder of the hydraulic cylinder test bench and one end of the second pressing hydraulic cylinder of the hydraulic cylinder test bench, so that the hydraulic oil can circularly flow among the pump station, the first pressing group and the second pressing hydraulic cylinder through the third interface;

the fourth interface is respectively communicated with the pump station, and the other end of the fourth interface is suitable for being communicated with one end of the tested oil cylinder, so that the hydraulic oil can circularly flow between the pump station and the tested oil cylinder through the fourth interface;

the first interface, the second interface, the third interface and the fourth interface are all provided with a throttle valve and an overflow valve;

the second interface, the third interface and the fourth interface are all provided with hydraulic control one-way valves.

9. The hydraulic system of claim 8, wherein the second interface group comprises:

the fifth interface is respectively communicated with the liquid return tank and the other end of the second driving hydraulic cylinder, so that the hydraulic oil can circularly flow between the second driving hydraulic cylinder and the liquid return tank through the fifth interface;

the bidirectional hydraulic lock is respectively communicated with the first interface and the second interface so as to control the stroke of the second driving hydraulic cylinder;

the sixth interface is respectively communicated with the liquid return tank and the other end of the first driving hydraulic cylinder, so that the hydraulic oil can respectively circulate between the first driving hydraulic cylinder and the liquid return tank through the sixth interface;

one end of the seventh interface is communicated with the liquid return tank, and the other end of the seventh interface is respectively communicated with the other end of the first pressing hydraulic cylinder and the other end of the second pressing hydraulic cylinder, so that the hydraulic oil can circularly flow among the first pressing hydraulic cylinder, the second pressing hydraulic cylinder and the liquid return tank through the seventh interface;

one end of the eighth interface is communicated with the liquid return tank, and the other end of the eighth interface is suitable for being communicated with the other end of the tested oil cylinder, so that the hydraulic oil can circularly flow between the tested oil cylinder and the liquid return tank through the eighth interface;

and the fifth interface, the sixth interface, the seventh interface and the eighth interface are provided with a liquid return circuit breaker valve and a safety valve.

10. The hydraulic system of claim 9, wherein the pressure detection assembly comprises:

the first pressure sensors are respectively arranged at the second interface and the sixth interface, and are used for detecting the pressure in the first driving hydraulic cylinder so as to adjust the thrust force applied to the tested hydraulic cylinder;

the second pressure sensors are respectively arranged at the third interface and the seventh interface and are used for detecting the pressure of the first pressing hydraulic cylinder and the second pressing hydraulic cylinder so as to adjust the pressure between the first box body and the support;

and the third pressure sensors are respectively arranged on the fourth interface, the eighth interface and the tested hydraulic cylinder, and are used for detecting the pressure of the fourth interface, the eighth interface and the tested hydraulic cylinder so as to accurately control and control the stroke of the tested hydraulic cylinder.

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