Tveks EK-18: technical characteristics, review, description

Among a large selection of excavator models, mainly foreign brands, Russian companies also offer their own models, built both from domestic components and in cooperation with foreign manufacturers of important components and assemblies. One of the most used and purchased Russian excavators is TVEX EK-18.

Technical characteristics of Tveks EK-18, weight

The maximum speed that this model can reach is 20 km/h.

The standard digging depth of the Twex EK-18 is 5.7 meters, the digging radius at the parking level is 8.85 meters, and the unloading height is 6.2 meters. Depending on what handle size was chosen, certain indicators of earthmoving work are changed and set, different from the standard ones.

All specified handle sizes (2.2, 2.8 and 3.4 meters), which can be equipped with the EK-18 excavator, make it possible to use buckets of various volumes: 0.65, 0.77 and 1 cubic meters. meters respectively.

Recommendations

Dismantling and destruction of brick, concrete and reinforced concrete structures of medium strength, including cutting reinforcement, destruction of metal structures, cutting scrap metal, charge. Loading and unloading bulk and non-bulk cargo from gondola cars.

A bucket with a volume of 1 m3 can be replaced with:

• Replaceable handles L=2200 mm, 2800 mm, 3400 mm and with buckets V=0.77 m3,0.65 m3, respectively.
• Hydraulic hammer MG-300, designed for destruction of concrete and reinforced concrete road surfaces, brick structures, unreinforced concrete and other similar works, including loosening frozen soil and compacting loose soil.
• Hydraulic shears NG-1624
• Ripper 225-00-40.17.400
• Log grabber 313-00-40.12.000 with a lifting capacity of 3 tons for loading and unloading operations and stacking logs and other lumber. The log grabber can be equipped with a full-rotation rotator.
• Digging grab and grab for bulk materials.

There is an option with two pairs of outriggers.

The engines fully comply with all international environmental requirements and have a number of significant advantages:

• twice the service life and warranty period compared to domestic engines;
• 10% more torque;
• ensuring fuel savings of 10-20% depending on the type of work;
• reduction of maintenance time by 20% due to increased intervals between maintenance;
• reduction of noise and vibration at the operator’s workplace.

Materials used by Tverskoy Excavator OJSC, https://www.tvexc.ru.

Engine Tveks EK-18

The Tveks EK-18 excavator is equipped with a D-245 power unit. At the customer's request, this machine can be equipped with an imported Perkins engine (with increased power) with a hydraulic pump and a hydraulic drive motor manufactured by Bosh-Rexort.

Photo source: avtex.su Photo Tveks EK-18

Engine D-245 is:

• four-stroke
• four-cylinder (each diameter is 110 mm)
• diesel power unit.

There is a liquid cooling system, direct fuel injection, and a fuel pre-heater, which allows you to start the car without problems at air temperatures down to -40°C. In general, the temperature range at which Tvex EK-18 can be used is quite wide: from minus 40 to plus 40 degrees Celsius.

The Tvaks EK-18 fuel tank can hold up to 255 liters of diesel fuel.

Specifications

To increase the lifting capacity of TVEX 18, the installation of two boom-lifting hydraulic cylinders and a bucket with a volume of 1 cubic meter is provided. m.

The main technical characteristics of TVEX EK-18 include:

• weight – 18 t;
• capacity of the standard assembly working body – 0.65 m3, 0.77 m3, 1 m3;
• unloading height – from 6.24 m to 6.75 m;
• digging radius – from 8.85 m to 10 m;
• digging depth – from 5.77 m to 6.97 m;
• angle of rotation of the working body – 177 degrees.

The characteristics of heavy construction equipment depend on the modification. The machine demonstrates high performance at ambient temperatures from -40 to +40 degrees. Thus, the excavator can work not only in Russia, but also in other countries.

Engine

D-245 2S2

The high characteristics of TVEX 18 are due to the installation of a powerful D-245 engine with a volume of 4.75 liters. It is a four-stroke, four-cylinder powerplant producing 77 kW or 107 horsepower. It is equipped with a water cooling system and a direct fuel mixture supply system. The rotation speed is 2200 revolutions per minute of operation. Diesel fuel is used, the unit is started using an electric starter. Engine auxiliary components are manufactured in Germany. Modifications can be equipped with a Perkins engine, model 1104C-44TA, with a power of 123 horsepower.

The cylinders of the domestic engine with a diameter of 110 mm are arranged in a row, vertically. The main components of the engine are connecting rods, pistons, cylinder block, cylinder head, flywheel, crankshaft. All of them are serviceable. To improve the performance of the power plant, turbocharging is used, which ensures an increase in torque to a maximum value (386 Nm) and throttle response. The boost force is adjusted by the operator.

To start the engine in cold weather, a pre-start heater made in Germany “Hydronic 10” is provided.

Fuel consumption

It is 236 g/kW per hour of operation, the diesel fuel tank holds 255 liters.

Transmission

Gearbox 1 – flange; 2 – half-coupling shaft; 3, 16 – cuffs; 4, 8, 11, 18,20,23,25 – bearings; 5 – hydraulic motor; 6, 28 – body; 7, 9, 19,24, 26 – gears; 10 – gear shaft; 12, 17,29 – covers; 13 – brake pulley; 14 – brake pad; 15 - finger; 21.27 – coupling halves; 22 – shaft.

The EK-18 gearbox is used to transmit torque from the hydraulic motor to the drive axles; to change gears, turn on/off the front axle and prevent the excavator from spontaneously starting to move (applying the parking brake). The gearbox consists of a hydraulic motor, a 2-speed gear transmission, a gear shift mechanism, and a parking brake. The excavator axles are equipped with pneumatic shoe brakes.

Electrical equipment

Electrical equipment EK-18 is responsible for starting the engine, illuminating the work area if necessary, ventilating the cabin, turning on the light alarm when the special vehicle is moving, and for pre-heating the diesel engine. In addition to the starter, consumers of electricity on this equipment are control and measuring equipment, lighting and signaling equipment, electric fan motors, and a motor heater. All current sources and consumers are connected according to a single-wire circuit, in which the metal structure (“ground”) of the special vehicle serves as the negative wire.

Chassis

The chassis is represented by a wheeled chassis. The excavator is equipped with a hydrostatic gearbox manufactured by the German company ZF, which is characterized by high reliability, long service life and efficiency under any working conditions. This transmission, when working together with the engine, allows the vehicle to move at speeds of up to 20 km/h.

The TVEX 18 excavator moves around the work site autonomously. To transport equipment to a work site, it is necessary to use a tug, and the maximum speed reaches 40 km/h.

The standard assembly includes a blade support and two outriggers, which ensure machine stability.

Hydraulic system

The consumer has the opportunity to buy TVEX EK-18 with various hydraulic systems depending on the modification of the machine. The Russian production system is installed as standard. It is characterized by a power of 50 kW or 70 horsepower. The maximum pressure in the system is 28 MPa, and the pump that creates it pumps 248 liters of hydraulic fluid per minute of operation. The tank designed for hydraulic fluid holds 350 liters.

The modifications are equipped with a joint production system between Bosch and Rexroth.

Attachments

In addition to a large selection of digging buckets for EK-18 excavators, several types of additional attachments are provided.

So, the car can be equipped with:

• hydraulic shears
• hydraulic hammer
• log grabber
• ripper
• digging with a grab
• loading grab.

All this allows the machine to be used not only on urban construction sites. It is actively used in agriculture and forestry, especially after it became possible to install a log grabber, as well as in rural, reclamation and transport construction.

Purpose

The pneumatic wheeled excavator EK-18 is quite popular among construction organizations, public utilities, industrial sectors, as well as agriculture. The excavator is able to cope with such types of work as soil profiling; planning the area for construction; excavation; digging trenches and pits; well development; creation of embankments of soil and other bulk materials; loading and unloading; destruction of concrete and reinforced concrete structures; opening of asphalt and concrete surfaces; leveling work sites; filling holes and ditches; cleaning work areas from industrial waste and much more.

Modifications

Today there are several modifications of the Tveks EK-18 excavator. These are cars with indexes 20, 30, 40, 44, 60 and 90 (M). Differences from the classic EK-18 consist of buckets of different volumes, different load capacities, hydraulics and power units. For example, the EK-18-60 model is powered by a Perkins engine. Its stated digging depth is less than that of other modifications.

Photo source: spectehnika-info.ru Photo Tveks EK-18

Video

EK-18 is designed to work with mounted grabs with a diverse level of functional focus. The most popular are mobile modifications with a wheeled chassis, but there are also heavy tracked versions.

The EK-18 is a truly multi-purpose earthmoving machine. Using it, you can dig quarries, trenches and pits in soils belonging to categories I-IV, and again load frozen soils and loosened rocks with a piece size of less than 200 mm.

Modifications of the EK 18-20, 18-30, 18-40, 18-44, 18-60 excavator

Tverskoy Excavator produces several modifications of this model:

• classic EK-18;
• EK-18-20 with increased productivity and a bucket with a volume of one cubic meter. Thanks to the additionally reinforced metal structure of the equipment, special equipment can work in difficult conditions. For the EK-18-20, the manufacturer offers a huge selection of replacement working equipment. At the same time, the model itself is considered the most powerful multifunctional machine;
• EK-18-30 is an analogue of EK-18-20 with similar characteristics. The only difference is the presence of imported hydraulics;
• EK-18-40 is a hydraulic pneumatic wheeled excavator equipped with a grab grip. a specialized version designed for loading timber and scrap metal. Additionally equipped with a hydraulic lifting operator's cabin and scrap equipment;
• EK-18-44 is a special pneumatic wheel modification with a GP-554 5-jaw grab with a capacity of 0.65 cubic meters, a hydraulic lifting operator’s cabin, a full-rotary rotator and scrap equipment. used for loading/unloading gondola cars and loading timber and scrap metal;
• The EK-18-60 is equipped with a Bosch-Rexroth hydraulic travel motor, a hydraulic pump and a Perkins unit.
• Wheeled excavator Tveks EK-18-90 (M) is an evolutionary continuation of the previous model. Changed design of working equipment, more powerful engine.

Main advantages of EK-18:

1. sustainability;
2. powerful motor;
3. advanced operator cabin;
4. long service life and reliability;
5. significant productivity;
6. ease of operation and ease of maintenance;
7. multifunctionality;
8. thoughtful arrangement of instruments and indicators on the control panel.

Device

One of the main features of the EK-18 is the unique arrangement of the operator’s cabin, which has been redesigned to the maximum for convenient and safe control of the equipment. The Tver Excavator engineers have significantly transformed this element in terms of control. Otherwise (individual controls, levers) there have been no fundamental changes.

The location of the operator's cabin in the EK-18 has again been revised. It now provides the operator with maximum visibility. According to this indicator, Tver special equipment can easily compete with advanced foreign analogues. At the same time, in terms of quality and price, it surpasses many of them.