ECG-5A: technical characteristics, review, description

Technical characteristics of ECG-5A

The EKG-5A excavator is designed for temperate climates with temperatures ranging from -40 to +40°C, as well as for tropical climates at an altitude of no more than 1,000 m above sea level. Let us list its individual technical characteristics.

Description of ECG excavators

Excavator ECG - decoding numbers and letters. The numbers in the model names indicate the volume of the bucket in cubic meters. The number is followed by a letter index indicating the manufacturer's improvement. For example:

• letter A - indicates the first update of the model;
• the letter U is an extended piece of equipment designed for top loading;
• the letter D stands for diesel;
• the letter N is the name of the Novokramatorsky Machine-Building Plant;
• letter I - Izhora factories.

Let's look at the description of the design. The excavator is not complicated. The machine has 1 scoop, moves on tracks, and the control cabin rotates freely around its axis. The main equipment is called a mechanical shovel.

This machine has proven itself well in the quarry; it is used to develop lands of various categories. The mining and coal industries cannot do without this technology. The machine digs up the soil during mining, performs loading operations, filling dump trucks with a dump.

You can also install vertical impact crushers for rock https://www.mpcrusher.ru/product/statsionarnye-dso/vertikalnye-udarynye-drobilki/ with a different range of rotor rotation speeds.

ECG-5A device

The model consists of the following components: a rotating part, which includes a rotating platform with mechanisms located on it, and working equipment; undercarriage, consisting of a lower frame, two track frames with wheels and track chains; running gear, ring gear, roller circle.

All mechanisms on the EKG-5A platform are covered by the body. For ease of repair and installation of mechanisms on the platform, the roof of the body has removable panels. The location of the main units and components of the machine provides easy access to them for installation, dismantling and repair work. Most mechanisms and components have a block design and are interchangeable, which makes it possible to use the aggregate-unit method for repairs.

Photo source: techstory.ru The weight of the ECG-5A is 196 tons

Photo

Design features of ECG-5A:

1. rope lifting of a pulleyless type bucket with the function of automatic equalization of forces in the branches of the lifting rope;
2. boom lifting winch, facilitating installation and repair work;
3. rack-and-pinion pressure mechanism with an all-welded boom and a double-beam handle, ensuring optimal mining of rock faces;
4. Shoe brakes with pneumatic drive;
5. welded-cast bucket with self-tightening fastening of teeth;
6. 2-track undercarriage with separate track drive;
7. automatic lubrication system, which allows minimizing maintenance costs for the EKG-5A during operation;
8. the main metal structures are made of high-strength and alloy steel;
9. ventilation units support air injection into the body;
10. the main mechanisms are equipped with an individual adjustable electric drive.

The equipment operator's cabin is made taking into account ergonomic requirements. Its walls provide sound and heat insulation. The inside of the operator's cabin is decorated with decorative plastic. The vibration-isolated seat can be installed in any position convenient for the operator. The safety glass sun filter maintains optimal visibility while working. An electric heater and fan are again installed in the operator's cabin.

Price new and used

Buying a new ECG-5A is quite difficult. Used versions from 1995-1997 are offered for 3.2-4 million rubles.

The cost of renting an excavator is from 1100 rubles/hour.

Working equipment, chassis

The EKG-5A working equipment includes a bucket, a bucket handle, a bucket opening mechanism, a boom with a pressure mechanism and a two-legged stand. The lower end of the boom rests on the thrust bearings of the turntable, and the upper end is supported by a rope pulley. The rotating platform is equipped with a lifting winch, two rotating mechanisms, electrical equipment, a pneumatic system, a two-legged stand, a boom winch and a body.

The driver's cabin is located in the front right part of the platform. The turntable rests on the undercarriage through a roller circle and is connected to it by a central axle. A high-voltage current collector is installed between the rotary and lower frames. The undercarriage consists of a lower frame, a caterpillar track, a ring gear with a lower ring rail, a final drive with a brake, a hydraulic brake control system, and caterpillar gear shift couplings.

Photo source: techstory.ru Photo ECG-5A

The EKG-5A bucket consists of front and rear walls, a bottom, a rocker arm and a cage with an equalizing block. The front wall is made of high-manganese steel and is equipped with five removable teeth made of the same steel. The front wall and teeth are surfaced with a hard alloy of the “Sormite” type. The bucket body is connected with pins to the rocker arm and the bottom. The bucket handle consists of two welded rectangular beams made of low-alloy steel sheets with welded solid-rolled slats. The boom is a welded metal structure with a box-section. The boom of the EKG-5A quarry tracked vehicle is equipped with a pressure mechanism, head blocks, boom rope blocks and a bucket opening winch. For stability, the boom is secured to the turntable with side rods.

Electric drive EKG-5A

The pressure mechanism is driven by an electric motor, on the shaft of which a gear is attached, which meshes with the gear of the intermediate shaft of the gearbox. The rotary mechanism consists of two identical units. Each of them has a vertical electric motor with a flange resting on the gearbox housing. The running mechanism is driven by an electric motor mounted on the front wall of the lower frame.

Photo source: techstory.ruThe volume of the EKG-5A bucket is 5.2 cubic meters

The pneumatic system is designed to control lifting, slewing, pressure brakes, purging electrical equipment from dust, giving an audible signal and driving various pneumatic tools with compressed air from a single-stage two-cylinder compressor with a supply of 580 l/min with a working pressure of 0.7 MPa. The EKG-5A hydraulic system is designed to control the brake of the running gear and the track switching mechanism. The main parts of the hydraulic system are located on the rear wall of the lower frame.

The machine receives power from a high-voltage switching point. The quality of power supply must be ensured by the consumer in accordance with the standards of the current regulatory and technical documentation. Power consumption in half-hour mode is 250-275 kW with a weighted average power factor of 0.6. For power supply from the connection point, a high-voltage cable KShVG-Zx16+1x6 for temperate climate conditions or KShVG-T-Zx25+1xYu for tropical climate conditions is recommended. To control the high-voltage electric motor Ag-M (a five-machine converting unit) and the auxiliary power transformer Tr1, a small-sized high-voltage switchgear RU with a general disconnector, an oil switch for a trip current of 1.25 kA, having a manual drive, and fuses on 8 A or 16 A at a supply voltage of 6,000 V or 3,000 V, respectively.

Single-line electrical diagram

Relay current protection, as well as protection against lightning overvoltages and metering of consumed electricity consumption is provided by the consumer at the electrical substation or at the switching point. The housing is grounded to the quarry grounding circuit through the grounding conductor of the KShVG cable. The electric motors of lifting, pressure, rotation, and travel are powered by a generator-motor system with direct current controlled by power magnetic amplifiers UK-UMSP, UK-UMSN, UK-UMSV by cam command controllers KKP, KKN, KKV.

The EKG-5A control system contains blocks and assemblies that ensure the stability of the mechanical characteristics of the main drives when the temperature of electrical machines changes: current limiting blocks - UK-BTOP, UK-BTON, UK-BTOV; unit for stabilizing the excitation currents of the main drive motors - UK-BSTV; automatic digging unit - UK-BAK. The excavator provides monitoring of the insulation state of the 220 V AC power supply RU-R, as well as power and DC control circuits.

Video

EKG-5A is an updated version of outdated versions of Uralmashplant products (EKG-4.6 and EKG-4.6A).

Excavator Features:

• gears and bucket are made of high-alloy wear-resistant materials, guaranteeing trouble-free operation even under significant loads;
• presence of a semi-automatic digging control unit in the control system. Automation of the process facilitates the operator’s work and reduces fuel consumption;
• key metal structures (lower and rotating frames, boom and handle) are made of alloy rolled steel. This ensures the reliability of the equipment even when working in difficult mining, geological and climatic conditions;
• The electric drive of the model is created according to the “generator-motor” system, with excitation from thyristor converters with electronic control, or with control through magnetic amplifiers.

Excavators EKG-5A are large-sized and heavy-duty special equipment. Their transportation is carried out by rail transporters or vehicles. During transportation of the excavator, the two-legged stand is dismantled and the working equipment is removed.

In the line of Uralmashplant excavators, it is the EKG-5A model that is most widespread.

In addition to the basic modification of the EKG-5A, Uralmashplant produces modernized versions of the excavator:

• EKG-5V with pneumatic impact teeth suitable for breaking rock mass, and a pneumatic system that supplies the hammers with compressed air;
• EKG-5D with widened tracks and remote control system;
• EKG-5A-US with medium-long working equipment parameters. This model is used for excavating widened stopes.