CN108930675A - Hydraulic loading system oil inlet protective device - Google Patents
Hydraulic loading system oil inlet protective device Download PDFInfo
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- CN108930675A CN108930675A CN201810888586.8A CN201810888586A CN108930675A CN 108930675 A CN108930675 A CN 108930675A CN 201810888586 A CN201810888586 A CN 201810888586A CN 108930675 A CN108930675 A CN 108930675A
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- 238000011068 loading method Methods 0.000 title claims abstract description 28
- 239000010729 system oil Substances 0.000 title abstract description 4
- 230000001681 protective effect Effects 0.000 title 1
- 239000003921 oil Substances 0.000 claims abstract description 157
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 239000002828 fuel tank Substances 0.000 claims abstract description 4
- 239000010720 hydraulic oil Substances 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 238000009661 fatigue test Methods 0.000 abstract description 7
- 238000002474 experimental method Methods 0.000 abstract description 2
- 239000000306 component Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/021—Installations or systems with accumulators used for damping
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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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
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- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
本发明属于疲劳试验等技术领域，具体涉及一种液压加载系统进油保护装置。该液压加载系统进油保护装置包括油箱、液压泵、第一过滤器、第二过滤器、溢流阀、减压阀、电液伺服阀、液压缸、截止阀组、蓄能器、位移传感器。本发明提供的齿轮疲劳实验加载系统液压管路保护装置，在出油管路上设置截止阀组、蓄能器，在液压泵启动时，过大的压力可以部分进入蓄能器中，可以防止液压泵启动时瞬间高压对电液伺服阀、出油管路及液压缸等液压件造成高压冲击，从而可以延长各液压件的使用寿命。
The invention belongs to the technical field of fatigue test and the like, and in particular relates to an oil inlet protection device for a hydraulic loading system. The hydraulic loading system oil inlet protection device includes a fuel tank, a hydraulic pump, a first filter, a second filter, an overflow valve, a pressure reducing valve, an electro-hydraulic servo valve, a hydraulic cylinder, a shut-off valve group, an accumulator, and a displacement sensor . The gear fatigue experiment loading system hydraulic pipeline protection device provided by the present invention is equipped with a cut-off valve group and an accumulator on the oil outlet pipeline. When the hydraulic pump is started, the excessive pressure can partially enter the accumulator, which can prevent the hydraulic pump from When starting, the instantaneous high pressure will cause high pressure impact on hydraulic parts such as electro-hydraulic servo valve, oil outlet pipeline and hydraulic cylinder, so as to prolong the service life of each hydraulic part.
Description
技术领域technical field
本发明属于疲劳试验等技术领域，具体涉及一种液压加载系统进油保护装置。The invention belongs to the technical field of fatigue test and the like, and in particular relates to an oil inlet protection device for a hydraulic loading system.
背景技术Background technique
机械零件的疲劳寿命将直接影响整个机械产品的生命周期，随着社会经济的不断发展，人类工业化水平的不断提升，人们对待机械零件的疲劳试验越来越重视。The fatigue life of mechanical parts will directly affect the life cycle of the entire mechanical product. With the continuous development of social economy and the continuous improvement of human industrialization level, people pay more and more attention to the fatigue test of mechanical parts.
机械零件(包括各种机械结构件)的疲劳试验被工程研发人员广泛用于机械工业中，例如汽车、机床、工程机械等重型机械的关键核心零部件，都需要进行疲劳试验。The fatigue test of mechanical parts (including various mechanical structural parts) is widely used in the machinery industry by engineering R&D personnel. For example, key core components of heavy machinery such as automobiles, machine tools, and construction machinery require fatigue tests.
在疲劳试验中所使用的加载方法一般都是液压加载，因为液压加载稳定性好、可操控性强、可靠性高。传统的液压加载装置主要由液压泵和液压千斤顶通过软油管连接组成，这种传统的加载装置对于载荷数值的精确控制难以实现，并且在加载完成后难以长时间保持稳定载荷。The loading method used in the fatigue test is generally hydraulic loading, because hydraulic loading has good stability, strong controllability and high reliability. The traditional hydraulic loading device is mainly composed of a hydraulic pump and a hydraulic jack connected by a soft oil pipe. This traditional loading device is difficult to achieve precise control of the load value, and it is difficult to maintain a stable load for a long time after the loading is completed.
现有的齿轮疲劳实验中，在采用液压加载系统时，液压泵在启动的瞬间会产生高压的液压油，这种高压的液压油对各种控制阀门、出油管路及液压缸等液压件会产生高压冲击，将会降低各液压件的使用寿命。In the existing gear fatigue test, when the hydraulic loading system is used, the hydraulic pump will generate high-pressure hydraulic oil at the moment of starting. High-pressure shocks will reduce the service life of each hydraulic component.
因此，如何降低液压泵在启动的瞬间产生的高压对各种控制阀门、出油管路及液压缸等液压件产生的高压冲击，延长各液压件的使用寿命，成为本领域技术人员亟待解决的技术难题。Therefore, how to reduce the high pressure impact generated by the high pressure generated by the hydraulic pump at the moment of start-up on various control valves, oil outlet pipelines, hydraulic cylinders and other hydraulic components, and prolong the service life of each hydraulic component has become an urgent technology for those skilled in the art. problem.
发明内容Contents of the invention
本发明旨在至少解决现有技术中存在的技术问题，提出了一种液压加载系统进油保护装置，其可以改善上述现有技术存在的问题。The present invention aims at at least solving the technical problems in the prior art, and proposes an oil inlet protection device for a hydraulic loading system, which can improve the above-mentioned problems in the prior art.
为实现本发明的目的而提供一种液压加载系统进油保护装置，，包括油箱、液压泵、第一过滤器、第二过滤器、溢流阀、减压阀、电液伺服阀、液压缸、截止阀组、蓄能器、位移传感器；In order to achieve the purpose of the present invention, a hydraulic loading system oil inlet protection device is provided, including a fuel tank, a hydraulic pump, a first filter, a second filter, an overflow valve, a pressure reducing valve, an electro-hydraulic servo valve, and a hydraulic cylinder , cut-off valve group, accumulator, displacement sensor;
所述油箱分别连通有出油管路和回油管路，所述液压泵由电动机驱动，所述液压泵设于所述出油管路上，所述液压泵的进油口连通所述油箱，所述液压泵的出油口连通所述电液伺服阀的进油口，所述电液伺服阀的出油口分别所述液压缸的有杆腔和无杆腔，所述液压缸的出油口连通所述电液伺服阀的回油口，所述电液伺服阀的出油口连通所述回油管路；The oil tank is respectively connected with an oil outlet pipeline and an oil return pipeline. The hydraulic pump is driven by a motor. The hydraulic pump is arranged on the oil outlet pipeline. The oil inlet of the hydraulic pump is connected to the oil tank. The oil outlet of the pump is connected to the oil inlet of the electro-hydraulic servo valve, the oil outlet of the electro-hydraulic servo valve is respectively the rod chamber and the rodless chamber of the hydraulic cylinder, and the oil outlet of the hydraulic cylinder is connected to The oil return port of the electro-hydraulic servo valve, the oil outlet of the electro-hydraulic servo valve is connected to the oil return pipeline;
所述第一过滤器、第二过滤器、所述减压阀依次设置在所述液压泵连通所述电液伺服阀的出油管路上，所述第一过滤器、第二过滤器之间的出油管路上设有截止阀组、蓄能器，所述截止阀组的进油口连通所述出油管路，所述截止阀组的出油口连通所述蓄能器；所述第一过滤器、第二过滤器之间的出油管路上设有所述溢流阀，所述溢流阀的进油口连通出油管路，所述溢流阀的出油口连通回油管路；The first filter, the second filter, and the pressure reducing valve are sequentially arranged on the oil outlet pipeline where the hydraulic pump communicates with the electro-hydraulic servo valve. A cut-off valve group and an accumulator are arranged on the oil outlet pipeline, the oil inlet of the cut-off valve group is connected to the oil outlet pipeline, and the oil outlet of the cut-off valve group is connected to the accumulator; the first filter The overflow valve is arranged on the oil outlet pipeline between the filter and the second filter, the oil inlet of the overflow valve is connected with the oil outlet pipeline, and the oil outlet of the overflow valve is connected with the oil return pipeline;
所述液压缸的液压杆上设有位移传感器，所述位移传感器用于检测液压缸的作用行程，所述液压缸的液压杆的端部为所述液压缸的动力输出端，用于向被加载对象施加载荷。The hydraulic rod of the hydraulic cylinder is provided with a displacement sensor, and the displacement sensor is used to detect the working stroke of the hydraulic cylinder. The end of the hydraulic rod of the hydraulic cylinder is the power output end of the hydraulic cylinder, which is used to send Loading objects apply loads.
优选的，所述液压泵出油口处的出油管路上设有单向阀，所述液压泵的出油口连通所述单向阀的进油口。Preferably, a one-way valve is provided on the oil outlet pipeline at the oil outlet of the hydraulic pump, and the oil outlet of the hydraulic pump communicates with the oil inlet of the one-way valve.
优选的，所述第一滤油器为具有旁通阀的滤油器。Preferably, the first oil filter is an oil filter with a bypass valve.
优选的，所述第二滤油器为高压滤油器。Preferably, the second oil filter is a high-pressure oil filter.
优选的，所述回油管路上设有水冷却器，所述水冷却器用于对回油管路中的液压油进行冷却。Preferably, a water cooler is provided on the oil return pipeline, and the water cooler is used for cooling the hydraulic oil in the oil return pipeline.
优选的，所述回油管路上设有第三滤油器，所述第三滤油器的出油口连通油箱。Preferably, a third oil filter is provided on the oil return pipeline, and the oil outlet of the third oil filter communicates with the oil tank.
优选的，所述滤油器为具有旁通阀的滤油器。Preferably, the oil filter is an oil filter with a bypass valve.
本发明具有以下有益效果：The present invention has the following beneficial effects:
本发明提供的齿轮疲劳实验加载系统液压管路保护装置，在出油管路上设置截止阀组、蓄能器，在液压泵启动时，过大的压力可以部分进入蓄能器中，可以防止液压泵启动时瞬间高压对电液伺服阀、出油管路及液压缸等液压件造成高压冲击，从而可以延长各液压件的使用寿命。The gear fatigue experiment loading system hydraulic pipeline protection device provided by the present invention is equipped with a cut-off valve group and an accumulator on the oil outlet pipeline. When the hydraulic pump is started, the excessive pressure can partially enter the accumulator, which can prevent the hydraulic pump from When starting, the instantaneous high pressure will cause high pressure impact on hydraulic parts such as electro-hydraulic servo valve, oil outlet pipeline and hydraulic cylinder, so as to prolong the service life of each hydraulic part.
附图说明Description of drawings
图1为本发明实施方式提供的液压加载系统进油保护装置的原理示意图；Fig. 1 is a schematic diagram of the principle of an oil inlet protection device for a hydraulic loading system provided by an embodiment of the present invention;
附图标记说明：Explanation of reference signs:
液压泵1、第一过滤器2、第二过滤器3、溢流阀4、减压阀5、电液伺服阀6、液压缸7、位移传感器8、截止阀组9、蓄能器10、水冷却器11、第三过滤器12、压力表13。Hydraulic pump 1, first filter 2, second filter 3, overflow valve 4, pressure reducing valve 5, electro-hydraulic servo valve 6, hydraulic cylinder 7, displacement sensor 8, shut-off valve group 9, accumulator 10, Water cooler 11, third filter 12, pressure gauge 13.
具体实施方式Detailed ways
下面详细描述本发明的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本发明，而不能解释为对本发明的限制。Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
请参看图1所示，图1为本发明实施方式提供的液压加载系统进油保护装置的原理示意图。Please refer to FIG. 1 . FIG. 1 is a schematic diagram of the principle of an oil inlet protection device for a hydraulic loading system provided by an embodiment of the present invention.
如图1所示，本发明提供的液压加载系统进油保护装置，包括油箱、液压泵1、第一过滤器2、第二过滤器3、溢流阀4、减压阀5、电液伺服阀6、液压缸7、位移传感器8。As shown in Figure 1, the hydraulic loading system oil inlet protection device provided by the present invention includes a fuel tank, a hydraulic pump 1, a first filter 2, a second filter 3, an overflow valve 4, a pressure reducing valve 5, an electro-hydraulic servo Valve 6, hydraulic cylinder 7, displacement sensor 8.
所述油箱分别连通有出油管路和回油管路，所述液压泵1由电动机驱动，所述液压泵1设于所述出油管路上，所述液压泵1的进油口连通所述油箱，所述液压泵1的出油口连通所述电液伺服阀6的进油口，所述电液伺服阀6的出油口分别所述液压缸7的有杆腔和无杆腔，所述液压缸7的出油口连通所述电液伺服阀6的回油口，所述电液伺服阀6的出油口连通所述回油管路。The oil tank is respectively connected with an oil outlet pipeline and an oil return pipeline, the hydraulic pump 1 is driven by a motor, the hydraulic pump 1 is arranged on the oil outlet pipeline, and the oil inlet of the hydraulic pump 1 is connected with the oil tank, The oil outlet of the hydraulic pump 1 is connected to the oil inlet of the electro-hydraulic servo valve 6, and the oil outlet of the electro-hydraulic servo valve 6 is respectively the rod chamber and the rodless chamber of the hydraulic cylinder 7. The oil outlet of the hydraulic cylinder 7 is connected to the oil return port of the electro-hydraulic servo valve 6 , and the oil outlet of the electro-hydraulic servo valve 6 is connected to the oil return pipeline.
所述第一过滤器2、第二过滤器3、所述减压阀5依次设置在所述液压泵1连通所述电液伺服阀6的出油管路上，所述第一过滤器2、第二过滤器3之间的出油管路上设有所述溢流阀4，所述溢流阀4的进油口连通出油管路，所述溢流阀4的出油口连通回油管路，溢流阀4可以将出油管路中过高的压力排入到回油管路中，进而流回油箱；所述液压缸7的动力输出端作用于所述加载力臂40。The first filter 2, the second filter 3, and the pressure reducing valve 5 are sequentially arranged on the oil outlet pipeline of the hydraulic pump 1 communicating with the electro-hydraulic servo valve 6. The first filter 2, the second filter The oil outlet pipeline between the two filters 3 is provided with the overflow valve 4, the oil inlet of the overflow valve 4 is connected with the oil outlet pipeline, and the oil outlet of the overflow valve 4 is connected with the oil return pipeline, and the overflow The flow valve 4 can discharge the excessive pressure in the oil outlet pipeline into the oil return pipeline, and then flow back to the oil tank; the power output end of the hydraulic cylinder 7 acts on the loading arm 40 .
优选的方案中，在溢流阀4与出油管路连通的管路上设有压力表13，以检测出油管路的压力。In a preferred solution, a pressure gauge 13 is provided on the pipeline where the overflow valve 4 communicates with the oil outlet pipeline to detect the pressure of the oil pipeline.
优选的方案中，在液压缸7的液压杆上设有位移传感器8，用于检测液压缸7的作用行程。In a preferred solution, a displacement sensor 8 is provided on the hydraulic rod of the hydraulic cylinder 7 for detecting the working stroke of the hydraulic cylinder 7 .
优选的方案中，所述第一过滤器2、第二过滤器3之间的出油管路上设有截止阀组9、蓄能器10，所述截止阀组9的进油口连通所述出油管路，所述截止阀组9的出油口连通所述蓄能器10。在出油管路上设置截止阀组9、蓄能器10，在液压泵1启动时，过大的压力可以部分进入蓄能器10中，可以防止液压泵1启动时瞬间高压对电液伺服阀6、出油管路及液压缸7等液压件造成高压冲击，从而可以延长各液压件的使用寿命。In a preferred solution, a shut-off valve group 9 and an accumulator 10 are arranged on the oil outlet pipeline between the first filter 2 and the second filter 3, and the oil inlet of the shut-off valve group 9 communicates with the outlet The oil pipeline, the oil outlet of the cut-off valve group 9 communicates with the accumulator 10 . A cut-off valve group 9 and an accumulator 10 are installed on the oil outlet pipeline. When the hydraulic pump 1 is started, the excessive pressure can partially enter the accumulator 10, which can prevent the instantaneous high pressure on the electro-hydraulic servo valve 6 when the hydraulic pump 1 is started. The hydraulic parts such as the oil outlet pipeline and the hydraulic cylinder 7 cause high-pressure shocks, thereby prolonging the service life of each hydraulic part.
优选的方案中，所述液压泵1出油口处的出油管路上设有单向阀，所述液压泵1的出油口连通所述单向阀的进油口，单向阀可以防止出油管路中的液压油出现回流现象。In a preferred solution, a check valve is provided on the oil outlet pipeline at the oil outlet of the hydraulic pump 1, and the oil outlet of the hydraulic pump 1 is connected to the oil inlet of the check valve, and the check valve can prevent the The hydraulic oil in the oil pipeline is backflowing.
优选的方案中，所述第一滤油器为具有旁通阀的滤油器。为了防止因第一滤油器堵塞而使得液压泵1过载或引起滤芯破碎，在第一滤油器的滤油通道并联旁通阀，或者和第一滤油器并联堵塞指示器，如若出现堵塞，可以及时报警。In a preferred solution, the first oil filter is an oil filter with a bypass valve. In order to prevent the hydraulic pump 1 from being overloaded or the filter element broken due to the clogging of the first oil filter, a bypass valve is connected in parallel with the oil filter channel of the first oil filter, or a clogging indicator is connected in parallel with the first oil filter. , can call the police in time.
优选的方案中，所述第二滤油器为高压滤油器。因为出油管路压力较大，第二滤油器可以抗高压。In a preferred scheme, the second oil filter is a high-pressure oil filter. Because the pressure of the oil outlet pipeline is relatively high, the second oil filter can withstand high pressure.
优选的方案中，所述回油管路上设有水冷却器11，所述水冷却器11用于对回油管路中的液压油进行冷却，液压缸7在作用过程中，会产生大量的热量，使得液压油的温度升高，为了避免进入到油箱中液压油的温度太高，在回油管路上设置的水冷却器11可以对回油管路中的液压油进行冷却。In a preferred solution, a water cooler 11 is provided on the oil return line, and the water cooler 11 is used to cool the hydraulic oil in the oil return line. The hydraulic cylinder 7 will generate a large amount of heat during operation. The temperature of the hydraulic oil is increased. In order to avoid the temperature of the hydraulic oil entering the oil tank from being too high, the water cooler 11 arranged on the oil return line can cool the hydraulic oil in the oil return line.
优选的方案中，所述回油管路上设有第三过滤器12，所述第三过滤器12的出油口连通油箱。第三过滤器12具有较大的通流能力、压力损失小，可以过滤到回油管路中的杂质，以防止杂质进入油箱。In a preferred solution, a third filter 12 is provided on the oil return pipeline, and the oil outlet of the third filter 12 communicates with the oil tank. The third filter 12 has a large flow capacity and a small pressure loss, and can filter impurities in the oil return pipeline to prevent impurities from entering the oil tank.
优选的方案中，所述第三过滤器12为具有旁通阀的滤油器。为了防止因第三过滤器12堵塞而使得回油管路油压过大或引起滤芯破碎，在第三过滤器12的滤油通道并联旁通阀，或者和第三过滤器12并联堵塞指示器，如若出现堵塞，可以及时报警。In a preferred solution, the third filter 12 is an oil filter with a bypass valve. In order to prevent the oil pressure of the oil return line from being too high or the filter element broken due to the clogging of the third filter 12, a bypass valve is connected in parallel with the oil filter channel of the third filter 12, or a clogging indicator is connected in parallel with the third filter 12, If there is a blockage, you can report to the police in time.
以上依据图式所示的实施例详细说明了本发明的构造、特征及作用效果，以上所述仅为本发明的较佳实施例，但本发明不以图面所示限定实施范围，凡是依照本发明的构想所作的改变，或修改为等同变化的等效实施例，仍未超出说明书与图示所涵盖的精神时，均应在本发明的保护范围内。The structure, features and effects of the present invention have been described in detail above based on the embodiments shown in the drawings. The above descriptions are only preferred embodiments of the present invention, but the present invention does not limit the scope of implementation as shown in the drawings. Changes made to the idea of the present invention, or modifications to equivalent embodiments that are equivalent changes, and still within the spirit covered by the description and illustrations, shall be within the protection scope of the present invention.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112357472A (en) * | 2020-11-17 | 2021-02-12 | 中国矿业大学 | Automatic tensioning device and tensioning control method for electro-hydraulic combined belt conveyor |
| CN115388048A (en) * | 2022-09-06 | 2022-11-25 | 冠鼎液压科技(常州)有限公司 | Lathe servo hydraulic system |
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| CN109115488A (en) * | 2018-08-02 | 2019-01-01 | 清华大学 | Gear fatigue experiment loading system fluid pressure line protective device |
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| CN109115488A (en) * | 2018-08-02 | 2019-01-01 | 清华大学 | Gear fatigue experiment loading system fluid pressure line protective device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112357472A (en) * | 2020-11-17 | 2021-02-12 | 中国矿业大学 | Automatic tensioning device and tensioning control method for electro-hydraulic combined belt conveyor |
| CN115388048A (en) * | 2022-09-06 | 2022-11-25 | 冠鼎液压科技(常州)有限公司 | Lathe servo hydraulic system |
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