Transparent hydraulic starting machine experiment

The crane is a tire -type basic vehicle as the carrier with the work device and the manipulation of the crane equipment and the manipulation mechanism. Also known as a crane, a type of crane is lifted and handling machinery. The hydraulic crane is a self -consisting of tire -type basic vehicle with a carrier -loading equipment work device and operating mechanism. It is a widely used equipment in engineering machinery. Construction road construction, hydraulic engineering, national defense engineering and other industries. The hydraulic experimental table has the advantages of small size, light weight, convenient operation, and long -distance manipulation. The purpose is to guide students to carry out positive thinking, innovative design, and cultivate students' comprehensive design ability and practical hands -on ability.

2. Equipment composition

1. It is m--nly composed of components such as the crane tr--ning table, hydraulic pumping station, hydraulic element and various control devices, and programmable controllers (PLCs).

2. The tr--ning table and tr--ning desk are iron double -layer sub -light -densely spraying structures.

3. It can simulate various actions of the real -heavy machine working device. The hydraulic system uses an imported transparent machine glass hydraulic element and a transparent nylon hose. The structure and working principle of the hydraulic component, and the working principle of the hydraulic circuit at a glance. The entire tr--ning table has the advantages of image, intuitive, convenient, and reliable.

4. Equipped with a full -time hydraulic element: Each hydraulic element is equipped with a installed bottom plate, which can be placed on the aluminum alloy panel with convenient and randomly and at will (the aluminum alloy profile structure of the panel with the "T" groove formation). The oil circuit is overlapped with a fast conversion. It is convenient for disassembly and does not leak oil.

5. The m--n control unit of the electrical control unit is controlled by the PLC programming program controller. It can implement the microcomputer intelligent control with the PC microcomputer communication. At the same time, the hydraulic circuit is used as the control object to strengthen the learning and application of the PLC control programmable order controller.

6. The tr--ning control unit can also adopt an independent relay control unit for electrical control. Through comparison, the superiority and advancedness of the PLC programming program control is highlighted, and the understanding and mastering of the PLC programmer will be deepened.

1. Tr--ning project function

1. Water -cooled units are equipped with real parts such as a fully closed refrigeration compressor, condenser, evaporator and other refrigeration systems, and have a smart temperature regulator, flow meter, pressure gauge, voltage meter, current meter and other measuring instruments.

2. Automatic/manual adjustment of refrigerant flow: Experimental data can be adopted in different evaporation environments. Such as: overheating, too cold, etc.

3. Familiar with the basic structure and working principle of steam compressed refrigeration circulation system

4. Understand international standards GB/T5773-2004 The performance of the performance of volume refrigeration compressors

5. Use the evaporator liquid loading agent loop method (m--n themeter) to find the refrigeration machine refrigeration volume

6. Use water cooling condenser thermal balance method (auxiliary testing method) to find refrigeration compressed machine refrigeration volume

7. Calculation and analysis of the relative error of the primary and auxiliary refrigeration volume

8. Calculation and analysis of the energy efficiency ratio of refrigeration units

2. Device characteristics

1. The practical tr--ning device is established in accordance with international standard GB/T 5773-2004-volume refrigeration compressor performance tr--ning method, m--nly measured by the "evaporator liquid loading method", and the "water-cooling condenser heat device method" As auxiliary measurement

2. Use a 1 -refrigeration unit. The condenser and the evaporator are plate -type water conveyors. The system structure is compact, the layout is reasonable, and the shape is beautiful and generous.

3. Refrigeration flow control volume control system

1) Under the different pressures of the evaporator, the compressor is tested at different refrigeration volumes, and the compressor is too cold/overheating automatic adjustment

2) It is difficult to adjust and damage the mechanical throttle device during the experiment, allowing students to learn electronic control methods during the experiment, operate the adjustment method, and adjust the technical parameters.

5) Mode: In the touch screen or software connection mode: It can display the exhaust temperature, inhalation temperature, condensation temperature, and evaporation temperature of the compressor, which can be adjusted according to the temperature in real time according to the temperature. Excessive heat.

6) Two -way flow control module: By automatic adjustment of refrigerating flow, the exhaust temperature of the compressor can be effectively reduced and the compressor is efficiently done.