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31QB-30130 Excavator parts Doosan 130 DH140 wheel excavator gear pump hydraulic tail pump pilot pump
Product Details:
| Place of Origin: | CHINA |
| Brand Name: | GVO |
| Model Number: | DH130 140 |
Payment & Shipping Terms:
| Minimum Order Quantity: | 1PCS |
|---|---|
| Price: | Negotiable price |
| Packaging Details: | Export standard packaging |
| Delivery Time: | Within 2-7 Days After Receiving Payment |
| Payment Terms: | T/T，Western Union，Ali payment，L/C,Paypal |
| Supply Ability: | 480PCS |
|
Detail Information |
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| Model Name: | DH130 140 | Part Number: | 31QB-30130 |
|---|---|---|---|
| Condition: | 100%new | Appliion: | EXCAVATOR |
| Size: | Standard Size/custom Size | After-sales Service: | Online Suppor |
| Quality: | High Quality | APPLICABLE INDUSTRIES: | Building Material Shops, Machinery Repair Shops, Retail, Construction Works |
| Highlight: | Excavator Parts Hitachi EX55 Yuchai 55 60 Kaiyuan 55 60 Pilot Pump PVK-2B-505 Gear Pilot Pump | ||
Product Description
Excavator parts Doosan 130 DH140 wheel excavator gear pump hydraulic tail pump pilot pump loader gear pump 31LB-40500 brake pump engineering machinery parts 31QB-30130 R520-9 R480-9
| Brand | GVO |
| Appliion | hydraulic pump gear pump |
| Model No. | DH130 140 |
| Condition |
100% New
|
| Size | Standard |
| Package | As customer's requirment |
| Adavatages | High Quality |
| Factory Price | |
| Adequate inventory |
307002-4472 ZEXEL GEAR PUMP 9217996
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307012-1091, 307012-1090 ZEXEL GEAR PUMP 9218029 Kubota KH60, KH66, KX71
0510565058, 94126A 68741 61110 94508S
307012-8140 ZEXEL 94123Z
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307001-3420 ZEXEL Hitachi GEAR PUMP 9217979
307012-1090 ZEXEL GEAR PUMP 9218035 Kubota KH60, KH66, KX71
307012-8200 ZEXEL GEAR PUMP 9218043 KUBOTA KH60, KX41
0510365013, 307012-8201, 9218043, 38730, 3070128201, AZPFFF-11-005/005/004RXB202020MB, 222P5/5/4/4XB365013C
307002-4671 ZEXEL GEAR PUMP 9218006, 66415 88209, RD30161120
307002-4210 ZEXEL GEAR PUMP Hitachi 9217993
307002-5540 ZEXEL GEAR PUMP 9218012
307012-1311 ZEXEL GEAR PUMP 9226347, 74708H
The gear pump of a wheeled excavator (wheel excavator) is a key power element in its hydraulic system. Its working principle and function are as follows:
1. Working principle
The core of the wheel excavator gear pump is to achieve oil suction and oil pressure through the periodic change of the volume between the teeth when a pair of meshing gears rotate. The specific process is:
1. Oil suction: The active gear (driven by the engine) drives the driven gear to rotate in the opposite direction. On the side where the gear is disengaged (the oil suction chamber), the tooth groove volume increases to form a local vacuum, and the hydraulic oil in the tank is sucked into the tooth groove under the action of atmospheric pressure;
2. Oil pressure: The gear continues to rotate, and the oil in the tooth groove is brought to the meshing side (the oil pressure chamber). At this time, the gear enters the meshing, the tooth groove volume decreases, and the oil is squeezed out, and hydraulic oil with a certain pressure is output (usually medium and low pressure, adapted to the needs of wheel excavator walking, steering and other actions).
The whole process relies on the precise matching of the gear, the pump body and the end cover to form a sealed space, and the conversion of mechanical energy to hydraulic energy is completed through volume changes.
2. Main functions
1. Provide hydraulic power: provide pressure oil for the key actions of wheel excavators, including:
- Travel system: drive the wheel side motor to realize the whole machine forward, backward or steering;
- Auxiliary actions: such as boom lifting, bucket flipping and other light operation actions (in some wheel excavators, the gear pump may cooperate with the main pump to share the load);
- Steering system: provide power for the hydraulic steering cylinder to achieve flexible steering (wheel excavator steering relies on hydraulic power assistance, and gear pumps are a common power source).
2. Adapt to the characteristics of wheel excavators: gear pumps have a simple structure, low cost, strong anti-pollution ability, suitable for complex environments where wheel excavators often operate on unpaved roads, and easy maintenance.
3. Optimize system efficiency: as a medium and low pressure pump, it can be responsible for low-load actions such as walking and steering alone, avoiding excessive power consumption of the main pump (if any), and improving the fuel economy of the whole machine.
In short, the wheel excavator gear pump is a "hydraulic power source" that drives walking, steering and some operation actions. With its structural advantages, it adapts to the working conditions of wheel excavators and ensures flexible operation of the whole machine.
FAQ:
1.What do you mainly produce?
A;Our main business hydraulic Spare Parts,safety valve,Gear pump,hydraulic pump,control valve,Trave Motor Assy,swing motor,Seal kit, Electric parts,solenoid valve, engine assembly.etc.
2, Do you have stock for the goods?
A;We have plenty stock for many items in the warehouse.
3. Do you test all your goods before delivery?
A: Yes, we have a 100% test before delivery.
4.I know only the excavator model, but can not offer parts No., what should I do ?
A;If possible, you can send us the old photo, nameplate or the size for reference.
5.can I order one of our samples for testing first?
A: Of course!
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