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2 Abstract Two kinds of throttling speed control hydraulic systems are analyzed, and the control strategy of the throttle throttle speed control system is proposed. 1 Introduction Hydraulic elevators are safe and comfortable vertical transportation equipment in multi-storey buildings. They are also the cheapest heavy-duty vertical transportation equipment in factory warehouses. They are electro-hydraulic fluids and consist of several relatively independent and coordinated subsystems. Compared...
Information details Analyze the problem of slow lifting speed of manual hydraulic jack Time: 2014-11-15 Source: http://
Kunming University of Science and Technology, Japan 600 hydraulic universal testing machine hydraulic clamping piston rod damage analysis and improvement Guo Leikui Department of Electronic Information and Mechanical Engineering, Kunming University, Kunming, Yunnan, 65,8 due to the bending of the rod caused by eccentric compression The normal stress is superimposed on the normal stress generated by compression and the stress concentration. For the cause of the damage, the piston rod push-pull...
Information details Hydraulic gear pump attention points Time: 2014-06-09 Source: http:// 1. The working oil should be kept clean. It is recommended to install an oil filter with a filtration accuracy of 80-100μm in the suction pipe of the pump. Install an oil filter with a filtration accuracy of not less than 25μm in the oil return pipe, and clean it regularly according to the oil contamination. replace. 2. If the oil gear pump has oil filter, it should ensure that the effective flow rate of...
Method for measuring the output flow of hydraulic pump with clamp-type ammeter Zhu Baojing (Jinan Yuyin Zhongyuan Hydraulic Parts Factory, No. 303, Jing 10 Road, Jinan, Shandong Province, China) 250021 Tel: 013806495 Except for the special hydraulic component test bench, all hydraulic systems have no special requirements. In the case of a flow meter that does not detect the output of the hydraulic pump, in some cases, the design and maintenance personnel must also know the output flow of the...
/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Extended hydraulic piston pump operation method Source: China Bearing Network Time: 2017-10-05 The method of extending the life of the hydraulic piston pump: The power of the hydraulic system depends mainly on the volumetric power of the hydraulic pump; when the volumetric power drops to 72%; conventional repairs are required; replacement of bearings and aged seals; replacement or correction of friction pairs beyond the...
First, the system defects and hydraulic system have been greatly improved, and the double cylinder type has been changed to a single cylinder with a guide rod type. How to apply the advantages of the new hydraulic system (single cylinder) to the 400t twin-cylinder hydraulic press installed in 1980 by our factory. For many years, the first problem to be solved is how to connect the filling valve to the double cylinder. Connect and fix. After repeated research, we designed a four-way base block...
Since Jack Jones released Dunren as a spokesperson for Greater China, it was very popular. The "Xiangmi" just ended, and the craze has not faded. The news was announced, girls should like it very much, and they have already broken through the store. The threshold for the boyfriend to find Dunren's clothing. In the hot winter sales of 2018, most girls want to shoulder shoulder to shoulder with Dunren, then you will have a JACK&JONES men's clothing. What are the same clothes...
Theoretical study on hydraulic control of electronically controlled hydraulic actuators Zhang Lin Coal Research Institute Tangshan Branch, Tangshan City, Hebei Province, 063012, qualitative impact and response characteristics. 1 Overview For most hydraulic control systems, the dynamic characteristics of the hydraulic power mechanism largely determine the performance of the entire system. The power mechanism can be divided into a basic type of valve-controlled motor valve-controlled hydraulic...
High-pressure pump, most common parts, structural drawings, general part, structural drawing 1. Structural outline 1) Fixed 2) Mobile 2. Power end structure diagram 3. Hydraulic end structure diagram 1) Vertical hydraulic end 2) Horizontal hydraulic end 4. Safety valve structure diagram 5. Pressure relief valve structure diagram 6. Power end shifting gear horizontal pump body cleaning machine structure diagram 7. Diesel engine transmission structure diagram 8. Hardened gear reducer transmission...
Improvement of the hydraulic control circuit of the 2000 main hydraulic cylinder of Changzhou University of Technology Changsha 4I.OOS3 Li Guang Tan Jianping Hu Junping 2000 stretching hydraulic press is a key equipment of a factory, its maximum working pressure is 20 cutting mainly to complete the drawing forming process of 812 steel plate. Jiji's production capacity and operational reliability play a key role in the overall production. The main cylinder of the hydraulic press is a single...
Large-tonnage synchronous jacking hydraulic jack function Description Large-tonnage synchronous jacking hydraulic jack Function description: Bridge jacking, tunnel jacking (pipe jacking) installation or commissioning of heavy equipment, ship hull jacking, propeller loading or unloading or mainframe installation The object is translated into the existing building oil well platform for jacking and measuring synchronous presses, horizontal load movement, and the like. Beijing Lingying...
Zui big valve wholesale base in Henan area Zhengzhou to open Valves Technology, Inc., headquartered in the Central Plains zui large logistics center --- Zhengzhou, Henan Province, is a collection valve research and development production, sales and technical services in one of the fluid control business, with advanced equipment and detection technology All valves have undergone strict quality inspection and are “ excellent ” . Their products are widely used in high-tech fields such as...
The hydraulic brick press realizes the brick factory's leap to high-efficiency production and reduces the labor intensity of the workers. It is well known that the old-fashioned brick factory mainly said that we are familiar with the sintered clay brick factory. The old-fashioned brick factory continuously takes up the cultivated land and calls it “soil”. Tiger, the speed of destruction is amazing. Moreover, the production equipment is simple and the production of bricks is low. In...
: ■ J19H pressure gauge globe valve product overview : The opening and closing part of "J19H pressure gauge stop valve " is a plug-shaped valve flap with a flat or tapered surface. The valve flap moves linearly along the centerline of the fluid. The movement form of the valve stem has a lifting rod type (the valve stem is lifted and lowered, the hand wheel does not move up and down ) , and there are also lifting Rotating rod (hand wheel and stem rotation movements, nut located in...
Abstract: The disadvantages of the traditional pumping station configuration are analyzed. The functional characteristics of the new hydraulic control valve are expounded from the aspects of installation method and working reason, and the broad application prospect of the product is prospected. Keywords: water hammer, booster pump, control valve For the majority of water supply enterprises, the accidents occur the most, have a direct impact on the water supply, and the most influential part is...
The problems that should be paid attention to after the hydraulic pump is installed: (1) Pay attention to the operation status within three months of the operation of the new machine. During the operation of the new machine, check the operation status, such as the maintenance of the machine parts, whether the screws are loose, whether the oil temperature is abnormally rising, and whether the hydraulic oil is Deteriorate quickly, check whether the conditions of use meet the requirements, etc....
Cause Analysis and Reform of Leakage of High Speed Pump Mechanical Seal The ethylene unit propylene delivery pump (position E-GA301A/B) supplies the raw material for the downstream polypropylene unit. This pump is extremely important for the entire polypropylene unit. The liquid propylene used for the reaction is supplied by it, so once If there is a problem with the pump, it will cause the entire ethylene and polypropylene unit to stop. Since the pump was put into use in April 2001, the two...
1) The filter of the pump is blocked by dirt and cannot function as a filter: remove the dirt with a clean cleaning oil. 2) The oil level is insufficient, the oil suction position is too high, and the oil suction pipe is exposed to the oil surface: refueling to the oil standard position, reducing the oil absorption position. 3) There is no paper pad on both sides of the pump body and the pump cover; the pump body and the pump cover are not vertically sealed: air is sucked during rotation: a...
For the motor manufacturers of hydraulic oil pumps, the color of the surface paint is a common thing, but there are some special equipment to match the color of the motor is to have some attention or statement. Today, Dalan Motor Xiaobian will bring everyone to understand the purpose of special colors. Under the market economy conditions, the market direction of each motor enterprise is not the same, especially for the color requirements of the motor surface paint. All companies have their own...
Jinan Jinli Hydraulic Machinery Co., Ltd. is one of the largest professional manufacturers of hydraulic lifts in China. It is a member of China Lifting, Transportation and Warehousing Logistics Association and a unit of “Contract-honoring and Promise-keeping”. The hydraulic lifting platform is widely used in interior and exterior decoration, workshops, stations, shops, halls, street lamps, logistics loading and unloading, industrial assembly lines, highways and other industries. It has been...
The dimensions of the bearing directly matched to the motor for the hydraulic pump include the inner ring diameter, the outer ring diameter and the thickness. It involves the clearance of bearings, precision and other specific properties such as heat and dust. It plays a vital role in the overall performance of the motor. Today, Dalan Motor's small series focuses on the complex relationship between bearing clearance and motor. First, the factors affecting bearing clearance The play is an...
Limit switches are widely used in various machine tools and lifting machinery, such as hydraulic lifting platforms, aluminum alloy lifts, aerial work platforms, aerial work platforms, lifts, aerial work equipment, aerial work lifts, mast-type aerial work platforms, scissor-type high-altitude Work platform, crank-type aerial work platform, straight-arm aerial work platform, hydraulic freight elevator, used to control its travel, terminal limit protection. In the control circuit of the elevator,...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.