CN106801690B - A hydraulic system for loading test of hydraulic pump transmission system - Google Patents
A hydraulic system for loading test of hydraulic pump transmission system Download PDFInfo
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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
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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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
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/0416—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor with means or adapted for load sensing
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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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- 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
- F15B21/042—Controlling the temperature of the fluid
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/615—Filtering means
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/62—Cooling or heating means
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- 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
本发明涉及一种用于液压泵传动系统加载试验的液压系统，其特征在于，该液压系统包括：液压泵、溢流阀、换向阀、液压缸、调压阀、集液箱、加载弹簧和电控模块，其中，所述液压泵的入油口与所述集液箱的出油口连接，所述液压泵的出油口与所述溢流阀的入油口连接，所述溢流阀的出油口分别与所述换向阀的入油口以及所述集液箱的入油口连接，所述换向阀的出油口与所述调压阀的入油口连接，所述换向阀的两个工作油口分别与所述液压缸的通过活塞分隔开的两个油腔连接，所述调压阀的出油口与所述集液箱的入油口连接，所述液压缸的活塞连接至所述加载弹簧，所述加载弹簧设置有拉压力传感器，所述电控模块与所述溢流阀、换向阀、调压阀和拉压力传感器耦合。
The invention relates to a hydraulic system for loading test of a hydraulic pump transmission system, which is characterized in that the hydraulic system includes: a hydraulic pump, an overflow valve, a reversing valve, a hydraulic cylinder, a pressure regulating valve, a liquid collection tank, and a loading spring and an electric control module, wherein the oil inlet of the hydraulic pump is connected to the oil outlet of the liquid collection tank, the oil outlet of the hydraulic pump is connected to the oil inlet of the overflow valve, and the overflow The oil outlet of the flow valve is respectively connected with the oil inlet of the reversing valve and the oil inlet of the liquid collection tank, and the oil outlet of the reversing valve is connected with the oil inlet of the pressure regulating valve, The two working oil ports of the reversing valve are respectively connected with the two oil chambers of the hydraulic cylinder separated by the piston, and the oil outlet of the pressure regulating valve is connected with the oil inlet of the liquid collection tank , the piston of the hydraulic cylinder is connected to the loading spring, the loading spring is provided with a tension pressure sensor, and the electric control module is coupled with the relief valve, reversing valve, pressure regulating valve and tension pressure sensor.
Description
技术领域technical field
本发明涉及液压系统加载试验技术领域，具体地涉及用于液压泵传动系统加载试验的液压系统。The invention relates to the technical field of hydraulic system loading test, in particular to a hydraulic system used for hydraulic pump transmission system loading test.
背景技术Background technique
随着液压系统在农用机械及工程机械应用越来越广泛，液压系统载荷也越来越大，为适应市场需求，液压泵匹配功率越来越大将是个趋势；加大的液压泵对其传动系统要求越来越苛刻，改变液压泵与液压执行元件的匹配选型，通过仿真模拟其对传动系统的影响较难实现，目前现有技术中尚无针对液压缸负载系统测试的能力。开发液压泵传动系统可靠性测试能力，不仅能为液压泵及传动系的匹配提供数据支持，还能为整个液压系统的选型提供试验验证手段，从而提升产品竞争力。As the hydraulic system is more and more widely used in agricultural machinery and construction machinery, the load of the hydraulic system is also increasing. In order to meet the market demand, it will be a trend that the matching power of the hydraulic pump will become larger and larger; the increased hydraulic pump will affect the transmission system. The requirements are becoming more and more stringent, and it is difficult to change the matching and selection of hydraulic pumps and hydraulic actuators, and simulate its impact on the transmission system through simulation. At present, there is no ability to test the hydraulic cylinder load system in the existing technology. The development of reliability testing capabilities for hydraulic pump transmission systems can not only provide data support for the matching of hydraulic pumps and transmission systems, but also provide test verification methods for the selection of the entire hydraulic system, thereby enhancing product competitiveness.
现在考核液压泵传动系统，一种是利用整机匹配状态，在整车上进行耐久可靠性试验；该方法试验成本高，液压泵输出压力无法控制，试验工况一致性差。另外一种是利用管路节流憋压方式，控制液压泵输出压力，达到考核目的；这种方法使得管路节流憋压温升高，影响系统运行可靠性；与整车实际运行工况差别较大，模拟考核性不理想。Now to assess the hydraulic pump transmission system, one is to use the matching state of the whole machine to conduct a durability reliability test on the whole vehicle; this method is expensive to test, the output pressure of the hydraulic pump cannot be controlled, and the consistency of the test conditions is poor. The other is to control the output pressure of the hydraulic pump by using the pipeline throttling and holding pressure method to achieve the purpose of assessment; this method makes the pipeline throttling and holding pressure temperature rise, which affects the reliability of the system operation; it is different from the actual operating conditions of the vehicle The difference is large, and the simulation assessment is not ideal.
发明内容Contents of the invention
本发明的目的是通过以下技术方案实现的。The purpose of the present invention is achieved through the following technical solutions.
本发明提出一种用于液压泵传动系统加载试验的液压系统，该液压系统包括：液压泵、溢流阀、换向阀、液压缸、调压阀、集液箱、加载弹簧和电控模块，其中，所述液压泵的入油口与所述集液箱的出油口连接，所述液压泵的出油口与所述溢流阀的入油口连接，所述溢流阀的出油口分别与所述换向阀的入油口以及所述集液箱的入油口连接，所述换向阀的出油口与所述调压阀的入油口连接，所述换向阀的两个工作油口分别与所述液压缸的通过活塞分隔开的两个油腔连接，所述调压阀的出油口与所述集液箱的入油口连接，所述液压缸的活塞连接至所述加载弹簧，所述加载弹簧设置有拉压力传感器，所述电控模块与所述溢流阀、换向阀、调压阀和拉压力传感器耦合。The invention proposes a hydraulic system for loading test of hydraulic pump transmission system, the hydraulic system includes: hydraulic pump, overflow valve, reversing valve, hydraulic cylinder, pressure regulating valve, liquid collection tank, loading spring and electric control module , wherein the oil inlet of the hydraulic pump is connected to the oil outlet of the liquid collection tank, the oil outlet of the hydraulic pump is connected to the oil inlet of the overflow valve, and the outlet of the overflow valve The oil ports are respectively connected with the oil inlet of the reversing valve and the oil inlet of the liquid collection tank, the oil outlet of the reversing valve is connected with the oil inlet of the pressure regulating valve, and the reversing valve The two working oil ports of the valve are respectively connected to the two oil chambers of the hydraulic cylinder separated by the piston, the oil outlet of the pressure regulating valve is connected to the oil inlet of the liquid collection tank, and the hydraulic pressure The piston of the cylinder is connected to the loading spring, the loading spring is provided with a tension pressure sensor, and the electric control module is coupled with the relief valve, reversing valve, pressure regulating valve and tension pressure sensor.
进一步地，所述换向阀为三位四通换向阀。Further, the reversing valve is a three-position four-way reversing valve.
进一步地，所述换向阀为二位四通换向阀。Further, the reversing valve is a two-position four-way reversing valve.
进一步地，所述溢流阀为先导式比例溢流阀。Further, the relief valve is a pilot-operated proportional relief valve.
进一步地，在所述液压泵和所述溢流阀之间还设置有泄压阀，所述泄压阀的出油口分别连接至所述溢流阀的入油口以及所述集液箱的入油口。Further, a pressure relief valve is also provided between the hydraulic pump and the relief valve, and the oil outlet of the pressure relief valve is respectively connected to the oil inlet of the relief valve and the liquid collection tank oil inlet.
进一步地，在所述液压泵和所述泄压阀之间的管路上设置有温度传感器和压力传感器，所述温度传感器和所述压力传感器与所述电控模块耦合。Further, a temperature sensor and a pressure sensor are provided on the pipeline between the hydraulic pump and the pressure relief valve, and the temperature sensor and the pressure sensor are coupled with the electronic control module.
进一步地，在所述调压阀和所述集液箱之间还设置有热交换器。Further, a heat exchanger is also arranged between the pressure regulating valve and the liquid collection tank.
进一步地，在所述集液箱和所述液压泵之间还设置有过滤器。Further, a filter is further arranged between the liquid collection tank and the hydraulic pump.
进一步地，在所述调压阀和所述热交换器之间还设置有温控阀，用于控制通过所述热交换器的液体流量，所述温控阀与所述电控模块耦合。Further, a temperature control valve is further provided between the pressure regulating valve and the heat exchanger, for controlling the liquid flow through the heat exchanger, and the temperature control valve is coupled with the electric control module.
另外，所述液压泵由发动机带动并且通过该发动机的转速进行控制。In addition, the hydraulic pump is driven by the engine and controlled by the engine speed.
本发明的优点在于：The advantages of the present invention are:
本发明结构简单，通用性强，制作成本低，可以方便地根据试验的地点移动使用，能在整机或整车上进行液压泵负载试验。The invention has the advantages of simple structure, strong versatility and low manufacturing cost, can be conveniently moved and used according to the test site, and can carry out the load test of the hydraulic pump on the whole machine or the whole vehicle.
附图说明Description of drawings
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本发明的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiment. The drawings are only for the purpose of illustrating a preferred embodiment and are not to be considered as limiting the invention. Also throughout the drawings, the same reference numerals are used to designate the same components. In the attached picture:
图1示出了根据本发明实施方式的液压系统的示意图。Fig. 1 shows a schematic diagram of a hydraulic system according to an embodiment of the present invention.
具体实施方式Detailed ways
下面将参照附图更详细地描述本公开的示例性实施方式。虽然附图中显示了本公开的示例性实施方式，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施方式所限制。相反，提供这些实施方式是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
根据本发明的一种优选的实施方式，提出一种用于液压泵传动系统加载试验的液压系统，如图1所示，该液压系统包括：液压泵、泄压阀、溢流阀、换向阀、液压缸、调压阀、热交换器、集液箱、过滤器、加载弹簧(其例如采取两种弹簧组合装配的复合弹簧)和电控模块。其中，液压泵由发动机带动并且通过该发动机的转速进行控制。具体的布置方式为，液压泵的出油口与泄压阀的入油口连接，泄压阀的出油口分别与溢流阀的入油口以及温控阀的入油口连接，溢流阀的出油口分别与换向阀的入油口以及温控阀的入油口连接，换向阀的出油口与所述调压阀的入油口连接，换向阀的两个工作油口分别与所述液压缸的通过活塞分隔开的两个油腔连接，调压阀的出油口与温控阀的入油口连接，温控阀的出油口分别与热交换器以及集液箱连接，该温控阀可以通过电控模块控制，用于调节流过热交换器的液压油的流量，热交换器的出油口与集液箱的入油口连接，集液箱中的液压油可以通过过滤器流至液压泵；液压缸的活塞连接至加载弹簧，该加载弹簧设置有拉压力传感器(即，图1中右侧的传感器)；另外，电控模块与溢流阀、换向阀、调压阀和拉压力传感器耦合，从而能够根据具体的工况对溢流阀、换向阀和调压阀进行相应的控制，并能够通过拉压力传感器实时监控在各种工况下的拉力或压力。优选地，集液箱中设置有液位计，该液位计与电控模块耦合，从而能够实时监控集液箱中的液压油的液位。另外优选的是，在液压泵与泄压阀之间的管路中设置有与电控模块耦合的温度传感器(即，图1中的温感)和压力传感器(即，图1中的压感)，从而能够实时监控通过液压泵泵出的液压油的温度和压力。According to a preferred embodiment of the present invention, a hydraulic system for hydraulic pump transmission system loading test is proposed, as shown in Figure 1, the hydraulic system includes: hydraulic pump, pressure relief valve, relief valve, reversing Valves, hydraulic cylinders, pressure regulating valves, heat exchangers, liquid collection tanks, filters, loading springs (such as composite springs assembled in combination of two springs) and electronic control modules. Wherein, the hydraulic pump is driven by the engine and controlled by the engine speed. The specific arrangement is that the oil outlet of the hydraulic pump is connected to the oil inlet of the pressure relief valve, and the oil outlet of the pressure relief valve is respectively connected to the oil inlet of the relief valve and the oil inlet of the temperature control valve. The oil outlet of the valve is respectively connected with the oil inlet of the reversing valve and the oil inlet of the temperature control valve, and the oil outlet of the reversing valve is connected with the oil inlet of the pressure regulating valve. The oil ports are respectively connected to the two oil chambers of the hydraulic cylinder separated by the piston, the oil outlet of the pressure regulating valve is connected to the oil inlet of the temperature control valve, and the oil outlet of the temperature control valve is respectively connected to the heat exchanger And the connection of the liquid collection tank. The temperature control valve can be controlled by the electronic control module to adjust the flow of hydraulic oil flowing through the heat exchanger. The oil outlet of the heat exchanger is connected to the oil inlet of the liquid collection tank. The liquid collection tank The hydraulic oil in the hydraulic pump can flow through the filter to the hydraulic pump; the piston of the hydraulic cylinder is connected to the loading spring, and the loading spring is provided with a tension pressure sensor (that is, the sensor on the right in Figure 1); in addition, the electronic control module and the overflow Valve, reversing valve, pressure regulating valve and pressure sensor are coupled, so that the relief valve, reversing valve and pressure regulating valve can be controlled accordingly according to specific working conditions, and real-time monitoring can be carried out in various Tensile or compressive forces under working conditions. Preferably, a liquid level gauge is arranged in the liquid collection tank, and the liquid level gauge is coupled with the electronic control module, so that the liquid level of the hydraulic oil in the liquid collection tank can be monitored in real time. In addition, preferably, a temperature sensor (that is, the temperature sensor in Fig. 1) and a pressure sensor (that is, the pressure sensor in Fig. ), so that the temperature and pressure of the hydraulic oil pumped by the hydraulic pump can be monitored in real time.
具体地，该液压系统通过由电控模块控制的溢流阀调节液压泵输出液压油的带载工作压力，此时换向阀通过电控模块控制为处于与液压缸接通的状态，从而对弹簧施加拉力或压力，并且能够通过设置于弹簧中的拉压力传感器读取具体的弹簧力的数值，通过调节发动机的转速，能够对满载工况进行模拟；另外，通过电控模块改变换向阀的连接位置，使液压油通过该换向阀直接流至调压阀，即将液压缸旁路，并且通过电控模块控制调压阀设定系统的空载压力，从而模拟空载工况。Specifically, the hydraulic system adjusts the on-load working pressure of the output hydraulic oil of the hydraulic pump through the relief valve controlled by the electronic control module. The spring exerts tension or pressure, and the specific value of the spring force can be read through the tension and pressure sensor installed in the spring, and the full load condition can be simulated by adjusting the engine speed; in addition, the reversing valve can be changed through the electronic control module The connection position, so that the hydraulic oil flows directly to the pressure regulating valve through the reversing valve, that is, the hydraulic cylinder is bypassed, and the no-load pressure of the system is controlled by the electronic control module to control the pressure regulating valve, thereby simulating the no-load condition.
优选地，换向阀为三位四通换向阀。因此在加载工况下可以通过该三位四通换向阀的两种连接位置使液压油经由不同的路径通过液压缸，使得加载弹簧分别受到拉力和压力的作用。另外，溢流阀优选为先导式比例溢流阀。Preferably, the reversing valve is a three-position, four-way reversing valve. Therefore, under the loading condition, the two connection positions of the three-position four-way reversing valve can make the hydraulic oil pass through the hydraulic cylinder through different paths, so that the loading spring is respectively subjected to tension and pressure. In addition, the relief valve is preferably a pilot-operated proportional relief valve.
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，可轻易想到的变化或替换，都应涵盖在本发明的保护范围之内。因此，本发明的保护范围应以所述权利要求的保护范围为准。The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710003435.5A CN106801690B (en) | 2017-01-04 | 2017-01-04 | A hydraulic system for loading test of hydraulic pump transmission system |
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| CN201710003435.5A CN106801690B (en) | 2017-01-04 | 2017-01-04 | A hydraulic system for loading test of hydraulic pump transmission system |
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| CN106801690A CN106801690A (en) | 2017-06-06 |
| CN106801690B true CN106801690B (en) | 2019-08-27 |
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| CN201710003435.5A Active CN106801690B (en) | 2017-01-04 | 2017-01-04 | A hydraulic system for loading test of hydraulic pump transmission system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107575432B (en) * | 2017-09-29 | 2019-07-12 | 北京乐冶液压气动设备技术有限公司 | Hydraulic loading device with a variety of loading force output modes |
| CN109187200A (en) * | 2018-10-13 | 2019-01-11 | 西安航天动力测控技术研究所 | A kind of side crops industry manual loading experimental rig for test of static strength |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19929431A1 (en) * | 1999-06-26 | 2000-12-28 | Mannesmann Sachs Ag | Hydraulic control drive, e.g. for clutches, gearboxes, has arrangement for detecting level of fluid in reservoir container from duration of time for which pump is switched on |
| EP1388673A2 (en) * | 2002-08-07 | 2004-02-11 | Shikoku Kakoki Co., Ltd. | Drive device for packaging machine |
| CN1632503A (en) * | 2004-12-09 | 2005-06-29 | 洛阳轴研科技股份有限公司 | Simulation test loading device for automobile wheel hub bearing unit |
| CN200965501Y (en) * | 2006-10-16 | 2007-10-24 | 北京联合大学 | Hydraulic universal tester with the active loading at both ends of test piece |
| CN102269671A (en) * | 2011-04-28 | 2011-12-07 | 上海交通大学 | Electro-hydraulic loading system of thin-film biaxial tensile testing machine |
| CN204043900U (en) * | 2014-08-12 | 2014-12-24 | 天津格特斯检测设备技术开发有限公司 | A kind of valve hydraulic actuator pilot system |
| CN106015139A (en) * | 2016-07-20 | 2016-10-12 | 浙江大学 | Tension and compression testing machine hydraulic loading system adopting differential control of proportional overflow valves |
-
2017
- 2017-01-04 CN CN201710003435.5A patent/CN106801690B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19929431A1 (en) * | 1999-06-26 | 2000-12-28 | Mannesmann Sachs Ag | Hydraulic control drive, e.g. for clutches, gearboxes, has arrangement for detecting level of fluid in reservoir container from duration of time for which pump is switched on |
| EP1388673A2 (en) * | 2002-08-07 | 2004-02-11 | Shikoku Kakoki Co., Ltd. | Drive device for packaging machine |
| CN1632503A (en) * | 2004-12-09 | 2005-06-29 | 洛阳轴研科技股份有限公司 | Simulation test loading device for automobile wheel hub bearing unit |
| CN200965501Y (en) * | 2006-10-16 | 2007-10-24 | 北京联合大学 | Hydraulic universal tester with the active loading at both ends of test piece |
| CN102269671A (en) * | 2011-04-28 | 2011-12-07 | 上海交通大学 | Electro-hydraulic loading system of thin-film biaxial tensile testing machine |
| CN204043900U (en) * | 2014-08-12 | 2014-12-24 | 天津格特斯检测设备技术开发有限公司 | A kind of valve hydraulic actuator pilot system |
| CN106015139A (en) * | 2016-07-20 | 2016-10-12 | 浙江大学 | Tension and compression testing machine hydraulic loading system adopting differential control of proportional overflow valves |
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| CN106801690A (en) | 2017-06-06 |
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