Product Description

Rexroth hydraulic piston pump A8VO140 with Good Quality Made in ZheJiang

Hydraulic piston double pump A8VO55, A8VO80, A8VO107, A8VO140, A8VO200

Description  

Open circuit
Series 61 / 63
Control devices: LAOH2, LAOK, LAOKS, LAOKH1, LAOKH2, LAOKH3, LA1H2, LA1S, LA1K, LA1KS, EP, LA1KH1, etc.
Nominal pressure 350 bars. CZPT pressure 400 bars
 
- Variable double pump A8VO with 2 axial tapered piston rotary groups of bent-axis design for hydrostatic drives in open circuits
- The flow is proportional to the input speed and to the displacement, and is infinitely variable from qV max to qV min = 0
- The pump is suitable for direct mounting on the flywheel case in diesel engines
- One common suction port for auxiliary pump and both circuits
- A wide range of control instruments is available for different control and regulating functions
- Individual power controller
- Integrated auxiliary pump with pressure-relief valve, optionally with additional pressure-reduction valve
- Power take-off for mounting axial piston and gear pumps
- Excellent power to weight ratio
- Long service life
 
Technical Data 
Table of values (theoretical values, without efficiency and tolerances; values rounded)

Size A8VO55 A8VO80 A8VO107 A8VO140 A8VO200
Displacement Vg max cm3 2 x 54.8 2 x 80 2 x 107 2 x 140 2 x 200
Vg min cm3 0 0 0 0 0
Gear ratio i = ninput/nrotary groups 1 1 1 1 1
Input speed  at Vg max 1) nmax 1 rpm 2500 2240 2150 2100 1950
             at Vg ≤ Vg max2) nmax rpm 3000 2750 2450 2450 2250
Flow at nmax and Vg max qv max L/min 2 x 137 2 x 179 2 x 230 2 x 294 2 x 390
Power at nmax, Vgmax and Dp=350 bar Pmax kW 160 209 268 294  3) 325   3)
Input torque Tmax Nm 611 891 1192 1337  3) 1592  3)
Rotary stiffness (single rotary group)5) cTW Nm/rad 11213 17985 25565 41408 39505
cTW Nm/rad 41442 67666 89381 146677 156876
Moment of inertia for rotary group JTW kgm2 0.0161 0.5719 0.0345 0.0581 0.0849
without power take-off (PTO) JTW kgm2 0.0126 0.0173 0.5718 0.05 0.075
Angular acceleration (single rotary group)5) a rad/s2 25800 21800 17100 7500 11000
Mass approx. m kg 82 90 116 146 180
Variation: with integrated auxiliary pump, F00, F.. 4)
Displacement with integrated auxiliary pump Vg max cm3 8.6 8.6 8.6 (10.7) 10.7 11 (19)4)
Effective displacement Vg max/eff cm3 9.7 9.7 11 (13.7) 12.7 13.6 (23.6)
Gear ratio i = ninput/naux.  pump 0.887 0.887 0.78 0.843 0.804
Variation: with power take-offs, K.., F.
Max. torque at PTO Tmax Nm 250 350 380 450 650
Gear ratio i = ninput/nPTO 1 1 1 1 0.804

 

Certification: GS, CE, ISO9001
Excitation Mode: Other
Power Rating: Adjustable
Casing Protection: Iron Casting
Number of Poles: Other
Speed: High Speed
Samples:
US$ 100/Piece
1 Piece(Min.Order)

|
Request Sample

Customization:
Available

|

Customized Request

Shaft Collar

The Different Parts of a PTO Shaft

Power Take-Off (PTO) shafts are an integral part of a tractor's driveline. Without them, a tractor cannot operate. It is essential to understand the different parts of a PTO shaft, as they are crucial for the operation of your tractor. These parts are typically overlooked during routine tractor maintenance checks, but knowing more about them will help you practice on farm machinery better.

Tractor's power take-off (PTO) shaft

A Tractor's power take-off (or PTO) shaft transfers power from the tractor to an implement. These shafts typically rotate at speeds between 540 and 1000 rpm. A number of safety features help prevent accidental contact between the shaft and the implement.
In order to avoid this problem, tractor operators should be vigilant while operating their tractors. They should make sure that the tractor's power take-off (PTO) shaft is shielded. These shields include a master shield for the PTO stub, a PTO integral journal shield, and an implement input connection shield. The PTO master shield is mounted on the tractor and extends over the PTO stub on three sides. It is designed to prevent collisions between the tractor and any connected machine drive shaft.
A power take-off (PTO) shaft is an important component on any tractor. It is a shaft that transmits mechanical power from a tractor to an implement or separate machine. Early PTOs used a transmission and were located at the rear of the tractor. They are now available with hydraulic or mechanical drivelines. These power take-offs transfer the tractor's power to a secondary piece of equipment through a driveshaft.
Proper PTO shaft guards protect people from stepping on rotating shafts. The PTO should not compress fully at any point in the operating range. It should have several inches of overlap at the maximum operating extension. A PTO guard should be positioned properly for each machine.
Despite these benefits, there are still many risks associated with PTO shafts. These powerful and potentially dangerous pieces of machinery can cause severe injury if not used safely. Luckily, proper installation of safety shields can reduce the risk of injury.

Types

PTO shafts come in a variety of different shapes, sizes, and materials. The most common types are square and round, but there are also star-shaped and trilobed types. While the star-shaped type is a typical North American design, the trilobed and lemon-shaped varieties are typically German or Italian. Typically, the lemon-shaped ones are made of an alloy called 'Lemon Yellow.' In some cases, the shaft will come with snap rings.
Different manufacturers use various materials for their PTO shafts. The tube of a welded drive shaft must be strong enough to handle the force exerted by the PTO. There are many different materials available, but some are stronger than others. Before choosing the type of drive shaft that is right for your machine, make sure that you know the exact measurements of your driveline.
When deciding between different types of PTO shafts, you must also consider the materials that will be used for your particular application. While splines are the most common material for PTO shafts, you can find various types that have different uses. Carbon steel is malleable and has a low carbon content, which makes it more reliable. A ferrous steel is more durable and contains metals like nickel, chromium, and molybdenum, which make it a great alternative to carbon steel.
A PTO gearbox input shaft extends between the PTO gearbox and the PTO clutch. It is mounted with a toothed wheel 8. An inductive sensor 9 on the shaft outputs a pulsed electronic signal based on the rotational speed of the shaft. These pulsed signals are called inductive speed sensors.

Rotation direction

The PTO shaft is a critical part of the power take-off of a farm tractor. It allows the tractor to transfer power from the engine to an implement such as a mower or other garden equipment. The rotation direction of the PTO shaft depends on the type of implement. Some implements only accept rotation in one direction, while others require rotation in both directions.

Safety chain

Shaft CollarOne of the best ways to protect your PTO shaft is to use a safety chain. A safety chain is a chain that is attached to the PTO shaft, and it prevents the plastic shield from spinning on the shaft. This chain should be fastened to a suitable point on your machine or tractor. It should not be attached to the lower lift arms or the U-guard.
PTO shafts can be very dangerous if they are not guarded. They can rotate as high as 1000 rpm and could seriously injure you. It is also important to ensure that the PTO shaft guard is fitted correctly, and that the tractor is turned off before working on it. In addition, avoiding wearing loose clothing when working around a PTO shaft can help protect your life.
Another way to protect the PTO shaft is to shield the IID shaft. This can be done by using shielding over the straight part of the shaft, the PTO connection, or the Implement Input Connection. A protruding bolt or pin can catch clothing and snag it. If not shielded, the clothing can wrap around the shaft, trapping the person against it.
A good safety chain should be positioned between the tractor and the PTO shaft. The chain should be at least 50 mm wider than the PTO shaft, and should be in good condition. It should cover the entire length of the PTO shaft from the tractor to the first bearing. The PTO shaft must also be fitted with the correct bearing ring. It is also vital to ensure that the PTO guard does not bend or break, as this could result in damage to the PTO shaft.

Shield

Shaft CollarA PTO shaft shield protects the PTO shaft from possible impacts. It is typically made of plastic, but can also be made of metal. These shields are easy to damage, and are therefore preferably made of a durable material. The shields are held in place with brackets. The shields are made with two parts: an inner shield and a protective sleeve.
An improvement to the PTO shaft shield is a bracket that supports both the outer and PTO shaft. It is shown in conjunction with a towed machine in FIGS. 2 and 7. FIG. 7 is a side elevation of the bracket mounted to the tongue of the machine. This shield is designed to prevent the PTO shaft from becoming damaged during the towed process.
The main risk associated with PTO mishaps is entanglement, which can result in serious injuries. If a shaft separates from a tractor, it can strike nearby workers or people. Proper maintenance can minimize the risk of entanglement and save lives. Thankfully, equipment manufacturers have made huge strides in reducing the risk of these accidents. Operators should always make sure that the PTO shaft shield is in place to avoid the risk of entanglement.
In addition to preventing entanglement, a PTO shaft shield also helps protect the universal joints that are mounted on the PTO shaft. The shield is made of plastic or steel. It is typically shaped like an inverted U and covers both the top and sides of the shaft. A detachable PTO shaft shield is also available.
As with all parts of a PTO driveline, the PTO shaft shield should be maintained to prevent damage to the bearings. It is necessary to inspect the shield and replace it whenever it becomes damaged. PTO equipment is often used outdoors, and it is frequently exposed to crop debris, rust, and dirt that can affect the bearings. Proper maintenance will extend the equipment's lifespan and reduce maintenance costs.
China Hot selling CZPT Hydraulic Piston Pump A8vo140 with Good Quality Made in CZPT   attaching pto shaft to tractorChina Hot selling CZPT Hydraulic Piston Pump A8vo140 with Good Quality Made in CZPT   attaching pto shaft to tractor
editor by CX 2023-04-19