CN114215825A - Four-cylinder plunger type steering engine test bed - Google Patents
Four-cylinder plunger type steering engine test bed Download PDFInfo
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- CN114215825A CN114215825A CN202111355734.8A CN202111355734A CN114215825A CN 114215825 A CN114215825 A CN 114215825A CN 202111355734 A CN202111355734 A CN 202111355734A CN 114215825 A CN114215825 A CN 114215825A
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- 238000012360 testing method Methods 0.000 title claims abstract description 68
- 239000003921 oil Substances 0.000 claims description 162
- 239000010727 cylinder oil Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000010720 hydraulic oil Substances 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/007—Simulation or modelling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/001—Servomotor systems with fluidic control
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a four-cylinder plunger type steering engine test bed which comprises a loading rack, wherein a rectangular base is arranged in the center above the loading rack, a bottom supporting seat is arranged on the base, a thrust bearing is arranged at the bottom of an inner hole of the bottom supporting seat, a lining is arranged on the side surface of the thrust bearing, a loading tiller to be tested is fixed through a bush, a shaft neck of the loading tiller is arranged in an inner hole of the supporting seat in a cold-mounting mode, four oil cylinders which are arranged on the diagonal line of the base are distributed on the circumferential direction of the loading tiller, each oil cylinder is connected with a hydraulic control system on one side of the base through a hose, an electric cabinet is further arranged on one side of the loading rack, the electric control system controls the motor to start and stop to drive the pump to operate, and controls the electro-hydraulic reversing valve to be electrified to control the reversing valve to reverse, so that the operating direction of the loading tiller is controlled. The invention has the advantages of rigorous structure, reasonable layout, convenient use and low manufacturing cost, and can meet the market demand of developing the work.
Description
Technical Field
The invention relates to a steering engine test bed, in particular to a four-cylinder plunger type steering engine test bed, and belongs to the technical field of ship engineering machinery.
Background
The steering engine is an important device for keeping or changing the navigation direction of the ship, plays an important role in safe navigation of the ship, and is generally called as the second life of the ship. From the structural form of the steering engine, the reciprocating plunger type steering engine, the rotating vane type steering engine and the oscillating cylinder type steering engine are mainly applied at present. However, the rotating vane type steering engine also has the defects of large processing difficulty of the large-specification steering engine with the size of more than 1600kN.m, inconvenient replacement of a sealing element and a bearing and the like, so the market occupation of the existing rotating vane type steering engine is about 30%. The plunger type steering engine has the advantages of good torque characteristic, large bearing capacity, convenience in replacement of sealing elements and bearings and the like, and the market share of the plunger type steering engine is up to more than 50% at present, and particularly the share of specifications above 1600kN.m is up to more than 90%. At present, the plunger type steering engine with large torque only carries out no-load test at home, and then directly carries out navigation test on a real ship. Due to the fact that working conditions of a real ship test and a no-load test are greatly different, if a problem occurs in the real ship test, huge economic loss can be brought, and meanwhile, great potential safety hazards exist.
Disclosure of Invention
The invention aims to overcome the technical defects and provide a four-cylinder plunger type steering engine test bed to solve the problems that a two-cylinder plunger type steering engine test bed in the prior art is overlarge in impact force, unstable in working performance, high in noise, easy to damage the sealing of a plunger type steering engine and the like when being started.
The technical scheme for solving the technical problems is as follows: a four-cylinder plunger type steering engine test bed comprises a loading rack, wherein a rectangular base is arranged in the center above the loading rack, a bottom supporting seat is installed on the base, a thrust bearing is installed at the bottom of an inner hole of the bottom supporting seat, a bushing is installed on the side face of the thrust bearing, a loading tiller to be tested is fixed through the bushing, a shaft neck of the loading tiller is installed in the inner hole of the supporting seat in a cold-assembling mode, four oil cylinders are distributed on the diagonal line of the base in the circumferential direction of the loading tiller, each oil cylinder is connected with a hydraulic control system on one side of the base through a hose, an electric control box is further arranged on one side of the loading rack, an electric control system with functions of starting and stopping a pump set, starting and stopping a fan (air cooler) and heating a heater is integrated in the electric control box, and the electric control system controls the starting and stopping of a motor to drive the pump to operate, and controlling the electro-hydraulic reversing valve to be electrified to control the reversing valve to reverse so as to control the running direction of the loading tiller.
Further, hydraulic system includes pump station oil tank, plunger pump, valves, hydro-cylinder and the oil return filter that connects through the oil circuit, the plunger pump passes through motor drive operation to inhale the oil from the pump station oil tank, through oil circuit flow direction valves, oil gets into the oil feed runner through the valves with the oil circuit switching-over, get into the rodless chamber of hydro-cylinder through the hydro-cylinder oil inlet of hose connection and promote the hydro-cylinder pole to move along, lug on the hydro-cylinder pole passes through the connecting pin with the loading tiller of rack and is connected, the hydro-cylinder pole promotes the rotation of loading tiller, the oil in the hydro-cylinder chamber gets back to the control valve through oil return line through the hydro-cylinder oil-out, finally filter through the oil return filter and get back to pump station oil tank and realize test bench work, form closed oil return line simultaneously.
Furthermore, the control valve group comprises an oil tank, and a reversing valve, an overflow valve, a one-way valve, a speed reducing valve and a stop valve which are sequentially communicated with an oil path of the oil tank; each valves are connected through an internal flow passage hole or a pipeline, so that the test bed system is connected to a motor and a related valve bank through an electric cabinet, the lower part of the motor is connected with an oil pump, the operation of the oil pump is driven by controlling the operation of the motor to supply oil to the system, and meanwhile, the left position or the right position of the reversing valve is controlled to be electrified so as to control the left position or the right position of the valve bank to work, and the reversing purpose is achieved.
Further, the oil tank passes through the oil outlet pipeline of oil tank and links to each other with the oil inlet of plunger pump, the oil-out of plunger pump pumps oil pipe through the plunger and links to each other with the oil inlet of valves, the oil-out of valves is connected with the oil inlet of four hydro-cylinders respectively through an oil outlet pipeline, and the oil-out of four hydro-cylinders links to each other through the oil return opening of returning oil pipe with the valves respectively, the oil return opening of valves links to each other with another oil inlet of plunger pump through valves oil return pipe, the oil return opening of plunger pump returns oil pipe through the plunger pump and links to each other with the oil inlet of oil tank.
Furthermore, one end of each oil cylinder connected with the loading rack is a fixed end and is connected with a support frame welded on the periphery of the loading rack through a first connecting pin, and the other end of each oil cylinder is a piston rod end and is connected with the loading tiller through a second connecting pin; the oil cylinder comprises a piston arranged in a cylinder body, a hollow piston rod is arranged on the piston, the inner cavity of the cylinder body is divided into a rod cavity and a rodless cavity through the piston rod, the rodless cavity is communicated with an oil inlet of the cylinder body, the rod cavity is connected with an oil outlet on the cylinder body and is communicated through a conduit arranged in the piston rod to form an oil path.
Furthermore, the four oil cylinders are opposite in pairs to form a group, the four oil cylinders are divided into two groups, the four oil cylinders are uniformly distributed, the included angle between the oil cylinders is 90 degrees, and the system controls the piston rod to do back and forth telescopic motion through the direction of the hydraulic oil entering and exiting the oil cylinders, and simultaneously drives the loading tiller to rotate. The symmetrical arrangement makes the structure more stable, and the loading force is offset when the system is started, so that the system impact can be reduced.
Further, the test bed rack is used as a stress part during testing, and the strength of the test bed rack determines the safety of the test bed. Through continuous analysis, the arrangement and the structural design of a test bed are optimized, the test bed rack is composed of a side plate, a top plate and a bottom plate, the side plate, the bottom plate and the top plate are welded into a whole through rib plates, and the arrangement and the number of the steel plates are obtained through continuous modification through strength analysis.
Furthermore, the steering engine system is connected with the test bed through the switching circuit, a loading test is carried out on the steering engine system through a loading unit arranged on the test bed, a control signal is connected to the test cabinet, and a tester can input and set the test through the test cabinet.
The invention has the beneficial effects that: the four-cylinder plunger type steering engine test bed provided by the invention is stable in starting, low in noise, stable in steering engine test due to the fact that symmetrical stress is mutually offset, the sealed test bed structure improves the safety of the steering engine test, the structure is continuously improved through software analysis, stress concentration and deformation of a loaded steering handle are optimized, and the safety of a designed product is further determined. Moreover, the test bed can meet the loading test of a 3000KN.m plunger type steering engine, can simulate the working condition of a real ship test, can avoid the economic loss of the direct real ship test to a great extent, and simultaneously ensures the safety of workers on the ship.
The invention has the advantages of rigorous structure, reasonable layout, convenient use and low manufacturing cost, and can meet the market demand of developing the work.
Drawings
The invention is further described with reference to the following drawings and detailed description.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the oil cylinder structure of the present invention.
Fig. 3 is a schematic diagram of the hydraulic pump station system of the invention.
Fig. 4 is a schematic diagram of the oil circuit of the hydraulic power unit.
FIG. 5 is a graph of loaded tiller stress analysis of the present invention.
FIG. 6 is a cloud view of the loading tiller deformation of the present invention.
FIG. 7 is a stress analysis diagram of the loading gantry of the present invention.
Fig. 8 is a cloud of the loading gantry variations of the present invention.
Description of the drawings: 1-support frame, 2-connecting pin, 3-oil cylinder, 4-support seat, 5-loading tiller, 6-pump station, 7-electric cabinet, 8-hose, 9-motor, 10-oil return filter, 11-plunger pump, 12-oil return pipeline, 13-oil inlet pipeline, and 14-control valve group.
Detailed Description
Examples
The invention provides a four-cylinder plunger type steering engine test bed which comprises a loading rack, wherein a rectangular base is arranged at the center above the loading rack, a bottom supporting seat is arranged on the base, a thrust bearing is arranged at the bottom of an inner hole of the bottom supporting seat, a bushing is arranged on the side surface of the thrust bearing, a loading tiller to be tested is fixed through the bushing, a shaft neck of the loading tiller is arranged in the inner hole of the supporting seat in a cold-assembling mode, four oil cylinders which are arranged on a diagonal line of the base are distributed on the circumference of the loading tiller, each oil cylinder is connected with a hydraulic control system on one side of the base through a hose, an electric control box is further arranged on one side of the loading rack, an electric control system with a pump start-stop pump set, a fan start-stop (air cooler) and a heater heating function is integrated in the electric control box, and the electric control system controls a motor to start and stop to drive the pump to run, and controlling the electro-hydraulic reversing valve to be electrified to control the reversing valve to reverse so as to control the running direction of the loading tiller. The loading rack of the test bed is used as a stress part during the test, and the strength of the loading rack determines the safety of the test bed. As shown in fig. 7 and 8, the form of the bench is determined as shown in fig. 1 by continuous analysis, optimization of the arrangement and the structural design of the test bench.
The hydraulic system comprises a pump station oil tank, a plunger pump, a control valve group, an oil cylinder and an oil return filter which are connected through an oil way, wherein the plunger pump runs through a motor in a driving mode and absorbs oil from the pump station oil tank, the oil flows to the control valve group through the oil way, the oil enters an oil inlet flow channel by reversing the oil way through the control valve group, an oil cylinder oil inlet connected through a hose enters an oil cylinder rodless cavity to push an oil cylinder rod to move forwards, a lifting lug on the oil cylinder rod is connected with a loading tiller of a rack through a connecting pin, the oil cylinder rod pushes the loading tiller to rotate, the oil in the oil cylinder cavity returns to the control valve through an oil return pipeline through an oil outlet of the oil cylinder, and finally returns to the pump station oil tank through the oil return filter to realize the work of a test bench and simultaneously forms a closed oil return pipeline.
The control valve group comprises an oil tank, and a reversing valve, an overflow valve, a one-way valve, a speed reducing valve and a stop valve which are sequentially communicated with an oil path of the oil tank; each valves are connected through an internal flow passage hole or a pipeline, so that the test bed system is connected to a motor and a related valve bank through an electric cabinet, the lower part of the motor is connected with an oil pump, the operation of the oil pump is driven by controlling the operation of the motor to supply oil to the system, and meanwhile, the left position or the right position of the reversing valve is controlled to be electrified so as to control the left position or the right position of the valve bank to work, and the reversing purpose is achieved.
The oil tank passes through the oil outlet pipeline of oil tank and links to each other with the oil inlet of plunger pump, and the oil-out of plunger pump passes through the plunger pump and pumps the oil inlet of oil pipe way and valves and link to each other, the oil-out of valves passes through the oil outlet pipeline and is connected with the oil inlet of four hydro-cylinders respectively, and the oil-out of four hydro-cylinders links to each other through the oil return opening of returning oil pipe way and valves respectively, the oil return opening of valves links to each other through another oil inlet of valves oil return pipe way and plunger pump, the oil return opening of plunger pump links to each other through the oil inlet of plunger pump oil return pipe and oil tank.
One end of each oil cylinder connected with the loading rack is a fixed end and is connected with a support frame welded on the periphery of the loading rack through a first connecting pin, and the other end of each oil cylinder is a piston rod end and is connected with a loading tiller through a second connecting pin; the two connecting pins have the same structure and different sizes, and the size of the first connecting pin is larger than that of the second connecting pin for ensuring firmness. The oil cylinder comprises a piston arranged in a cylinder body, a hollow piston rod is arranged on the piston, the inner cavity of the cylinder body is divided into a rod cavity and a rodless cavity through the piston rod, the rodless cavity is communicated with an oil inlet of the cylinder body, the rod cavity is connected with an oil outlet on the cylinder body and is communicated through a conduit arranged in the piston rod to form an oil path.
The four oil cylinders are divided into two groups which are uniformly distributed, the included angle between the oil cylinders is 90 degrees, and the system controls the piston rod to do back-and-forth telescopic motion through the direction of the hydraulic oil entering and exiting the oil cylinders and simultaneously drives the loading tiller to rotate. The symmetrical arrangement makes the structure more stable, and the loading force is offset when the system is started, so that the system impact can be reduced.
The four-cylinder plunger type steering engine test bed is stable in starting and low in noise, meanwhile, the steering engine test is more stable due to the fact that symmetrical stress is mutually offset, and the safety of the steering engine test is improved due to the sealed test bed structure. The structure is continuously improved through software analysis, stress concentration and deformation of the loaded tiller are optimized, and safety of a designed product is further determined.
In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.
Claims (8)
1. The utility model provides a four jar plunger type steering wheel test benches which characterized in that: comprises a loading rack, a rectangular base is arranged at the center above the loading rack, a bottom supporting seat is arranged on the base, the bottom of the inner hole of the bottom supporting seat is provided with a thrust bearing, the side surface of the thrust bearing is provided with a lining, a loading tiller to be tested is fixed through a bush, a shaft neck of the loading tiller is arranged in an inner hole of the supporting seat in a cold-mounting mode, and four oil cylinders arranged on the diagonal line of the base are distributed on the circumferential direction of the loading tiller and are connected with a hydraulic control system on one side of the base through hoses, an electric control box is arranged on one side of the loading rack, an electric control system with the functions of starting and stopping a pump set, starting and stopping a fan and heating a heater is integrated in the electric control box, the electric control system controls the motor to start and stop to drive the pump to operate, and controls the electro-hydraulic reversing valve to be electrified to control the reversing valve to reverse, so that the operating direction of the loading tiller is controlled.
2. The four-cylinder plunger type steering engine test bed according to claim 1, characterized in that: the hydraulic system includes pump station oil tank, plunger pump, the valve unit, hydro-cylinder and the oil return filter that connects through the oil circuit, the plunger pump passes through motor drive operation to absorb oil from the pump station oil tank, through oil circuit flow direction valve unit, oil gets into the oil feed runner through the valve unit with the oil circuit switching-over, get into the oil cylinder rodless chamber through hose connection's hydro-cylinder oil inlet and promote the hydro-cylinder pole and move forward, lug on the hydro-cylinder pole passes through the connecting pin with the loading tiller of rack and is connected, the hydro-cylinder pole promotes the rotation of loading tiller, the oil in hydro-cylinder chamber gets back to the control valve through oil return line through the hydro-cylinder oil-out, finally filter through the oil return filter and get back to pump station oil tank and realize test bench work, form closed oil return line simultaneously.
3. The four-cylinder plunger type steering engine test bed according to claim 2, characterized in that: the control valve group comprises an oil tank, and a reversing valve, an overflow valve, a one-way valve, a speed reducing valve and a stop valve which are sequentially communicated with an oil path of the oil tank; each valves are connected through an internal flow passage hole or a pipeline, so that the test bed system is connected to a motor and a related valve bank through an electric cabinet, the lower part of the motor is connected with an oil pump, the operation of the oil pump is driven by controlling the operation of the motor to supply oil to the system, and meanwhile, the left position or the right position of the reversing valve is controlled to be electrified so as to control the left position or the right position of the valve bank to work, and the reversing purpose is achieved.
4. The four-cylinder plunger type steering engine test bed according to claim 3, characterized in that: the oil tank passes through the oil tank and goes out the oil inlet that oil pipe and plunger pump link to each other, the oil-out of plunger pump pumps oil pipe through the plunger and links to each other with the oil inlet of valves, the oil-out of valves passes through the oil pipe and is connected with the oil inlet of four hydro-cylinders respectively, and the oil-out of four hydro-cylinders links to each other through the oil return opening of returning oil pipe and valves respectively, the oil return opening of valves returns oil pipe through the valves and links to each other with another oil inlet of plunger pump, the oil return opening of plunger pump returns the oil pipe through the plunger pump and links to each other with the oil inlet of oil tank.
5. The four-cylinder plunger type steering engine test bed according to claim 2, characterized in that: one end of each oil cylinder connected with the loading rack is a fixed end and is connected with a support frame welded on the periphery of the loading rack through a first connecting pin, and the other end of each oil cylinder is a piston rod end and is connected with a loading tiller through a second connecting pin; the oil cylinder comprises a piston arranged in a cylinder body, a hollow piston rod is arranged on the piston, the inner cavity of the cylinder body is divided into a rod cavity and a rodless cavity through the piston rod, the rodless cavity is communicated with an oil inlet of the cylinder body, the rod cavity is connected with an oil outlet on the cylinder body and is communicated through a conduit arranged in the piston rod to form an oil path.
6. The four-cylinder plunger type steering engine test bed according to claim 1, characterized in that: the four oil cylinders are in a group in pairwise opposite, are divided into two groups in total and are uniformly distributed, the included angle between the oil cylinders is 90 degrees, the system controls the piston rod to do back and forth telescopic motion through the direction of the hydraulic oil entering and exiting the oil cylinders, and meanwhile, the loading tiller is driven to rotate, so that the structure is more stable, and the loading force is mutually offset when the system is started, so that the system impact can be reduced.
7. The four-cylinder plunger type steering engine test bed according to claim 1, characterized in that: the test bed rack is used as a stress component during testing, and the strength of the test bed rack determines the safety of the test bed; through continuous analysis, the arrangement and the structural design of a test bed are optimized, the test bed rack is composed of a side plate, a top plate and a bottom plate, the side plate, the bottom plate and the top plate are welded into a whole through rib plates, and the arrangement and the number of the steel plates are obtained through continuous modification through strength analysis.
8. The four-cylinder plunger type steering engine test bed according to claim 1, characterized in that: the steering engine system is connected with the test bed through the switching circuit, a loading test is carried out on the steering engine system through a loading unit arranged on the test bed, a control signal is connected to the test cabinet, and a tester can input and set the test through the test cabinet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355734.8A CN114215825A (en) | 2021-11-16 | 2021-11-16 | Four-cylinder plunger type steering engine test bed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111355734.8A CN114215825A (en) | 2021-11-16 | 2021-11-16 | Four-cylinder plunger type steering engine test bed |
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| Publication Number | Publication Date |
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| CN114215825A true CN114215825A (en) | 2022-03-22 |
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| CN202111355734.8A Pending CN114215825A (en) | 2021-11-16 | 2021-11-16 | Four-cylinder plunger type steering engine test bed |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1761986A1 (en) * | 1990-07-27 | 1992-09-15 | Московское научно-производственное объединение по строительному и дорожному машиностроению "ВНИИстройдормаш" | Hydraulic system of stand for testing steering gears |
| CN202166519U (en) * | 2011-08-24 | 2012-03-14 | 东北农业大学 | Ship steering engine loading device for ground test |
| CN103148051A (en) * | 2013-03-25 | 2013-06-12 | 长沙中联消防机械有限公司 | Hydraulic cylinder, hydraulic cylinder control system comprising same and engineering machinery |
| CN104833501A (en) * | 2015-05-13 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Steering engine base testboard frame |
| CN205937304U (en) * | 2016-07-31 | 2017-02-08 | 大连宏远气动液压船舶辅机有限公司 | Hydraulic actuator simulates test bench |
-
2021
- 2021-11-16 CN CN202111355734.8A patent/CN114215825A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1761986A1 (en) * | 1990-07-27 | 1992-09-15 | Московское научно-производственное объединение по строительному и дорожному машиностроению "ВНИИстройдормаш" | Hydraulic system of stand for testing steering gears |
| CN202166519U (en) * | 2011-08-24 | 2012-03-14 | 东北农业大学 | Ship steering engine loading device for ground test |
| CN103148051A (en) * | 2013-03-25 | 2013-06-12 | 长沙中联消防机械有限公司 | Hydraulic cylinder, hydraulic cylinder control system comprising same and engineering machinery |
| CN104833501A (en) * | 2015-05-13 | 2015-08-12 | 广西梧州运龙港船机械制造有限公司 | Steering engine base testboard frame |
| CN205937304U (en) * | 2016-07-31 | 2017-02-08 | 大连宏远气动液压船舶辅机有限公司 | Hydraulic actuator simulates test bench |
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Application publication date: 20220322 |
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