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Working principle of excavator hydraulic pump

Excavators are a common type of construction machinery and equipment widely used in earthwork excavation, transportation, loading and other engineering operations. The hydraulic pump is one of the core components of the excavator, responsible for providing stable hydraulic power. So, how does the excavator hydraulic pump work? Now let’s have a detailed understanding of the working principle of the excavator hydraulic pump.

The excavator hydraulic pump mainly consists of the hydraulic pump body, transmission shaft, coupling, and pump control system. Its working principle is to convert mechanical energy into hydraulic energy and transmit it to other hydraulic actuators through the hydraulic system to achieve the action of the excavator.

Related Excavator Hydraulic Pump We Supply :

K3V63DT Hydraulic Pump 9C/14T K7V63DTP Hydraulic Pump 9N0E/14T(LG915) K3V112DT Hydraulic Pump 9N/14T K3V112DTP OE11/14T(SY215-8S/9) K5V140DTP  9N/17T(DH300-7/19)
K3V63DT Hydraulic Pump 9N/14T K5V80DTP Hydraulic Pump 9N/12T(R150-9) K3V112DTP  9Y14/14T(SH210A5) K3V112DT  1E42/14T(EC220D) K5V140DTP 9C/17T(R305-7/25)
K3V63DT Hydraulic Pump HN/14T K5V80DTP  HN/12T(DH150W-7) K3V112DT 9T1L/14T(SK200-6) K3V112DTP  9C/14T(JCB220/25) K5V140DTP  9N/17T(DX300-7/25)
K3V63DT Hydraulic Pump 9P/14T K3V112DT Hydraulic Pump 9C/12T K3V112DTP Hydraulic Pump 9TCM/14T(SK200-6) K3V112DTP  9P12/12T(R225-9) K5V140DT  9N/17T(Liu Gong933E)
K3V63DTP  9N/14T(Takeuchi135) K3V112DT Hydraulic Pump 9N/12T K3V112DTP 9TEL/14T(SK200-6E) K3V112DTP Hydraulic Pump 9N/14T(LG920E) K5V140DTPYT6K/17T(SK350-8)
K3V63DTP OE02/14T(SK135) K3V112DT Hydraulic Pump HN/12T K3V112DTP Hydraulic Pump YT6K/17T(SK200-8) K3V112DTP  9N/14T(SH200A3) K5V140DT 1E05/17T(EC250D)
K3V63DTP  9C/14T(JCB130) K3V112DT 9C/14T K3V112DTP Hydraulic Pump 9T8L/14T(SY215-8) K3V112DTP 9P12/16T(PC200-7) K5V140DTP  9T1L/17T(SY235-8)

Our comprehensive catalog boasts an extensive selection of excavator parts, including but not limited to:

omatsu PC40, PC60-5-6-7, PC100, PC120, PC130, PC240, PC270, PC300,PC360,PC400,PC450,PC650,PC1250
PC200-1-3-5-6, PC220-1-3-5, PC300-3-5, PC400-1-3-5, D20, D30, D31, D50, D60, D75, D80 (D85), D155
Hitachi EX40, EX60, EX150, EX100M, EX100, EX120, EX150,
EX200-1-2-3, EX300-1-3-5, EX400, ZX450,ZX470,ZX870,ZX1200
Volvo EC55/60, EC140,EC210, EC240, EC290, EC360, EC460, EC700
Doosan DH215, DH220, DH260, DH280, DH300, DH370, DH420, DH450, DH500
Hyundai R200, R210,  R505
Kobelco SK200,SK210, SK220,SK260, SK300, SK330, SK350, SK450,SK460,SK480,SK800
Sumitomo SH120, SH200, SH280, SH300, SH350, SH400, SH450, SH460, SH70

Caterpilla r Series:
VRD63, E200B, AP12, AP14, CAT320C, SPK10/10, SPV10/10, CAT12G, CAT14G, CAT16G, CAT215, CAT245, CAT330B, PSV450, CAT992.
Liebher Series:
LPVD45, LPVD64, LPVD90, LPVD100, LPVD125, LPVD140, LPVD250
Kawasaki Series:
K3SP30, K3SP36C, K3V63DT/BDT, K3V112DT, K3V140DT, K3V180DT, K5V140, K5V200, NV64, NV84, NV111DT, NV137, NV172, NV270, NX15, NVK45, KVC925, KVC930, KVC932, M2X63, M2X96, M2X120, M2X146, M2X120, M2X1150/170, M2X210, M5X130, M5X180, MX150, MX173, MX500, MAG150, MAG170, GM05VL, GM06VL, GM05VA, GM07VA, GM08, GM09, GM10, GM23, GM24, GM30, GM35, GM38.
Kobelco Series:
SK200-1/3,SK220-3(MA340),SK220-2,SK200-6,SK320,SK430.
VOLVO Series:
F11-28, F11-39, F11-010, F11-150, F11-250, F12-060, F12-080, F12-110.

excavator hydraulic pump

The hydraulic pump body is the core component of the excavator hydraulic pump, usually using a gear pump or a plunger pump.There are a pair of gears or plungers that mesh with each other inside the hydraulic pump body, forming a certain volume inside the pump body. When the transmission shaft of the hydraulic pump rotates, the gear or plunger rotates accordingly, thereby changing the volume of the pump chamber.

When the volume of the pump chamber increases, the pressure inside the pump decreases, and hydraulic oil enters the pump chamber through the suction port; When the volume of the pump chamber decreases, the pressure inside the pump increases, and hydraulic oil flows out of the pump chamber through the pressure port. Through this working principle, the hydraulic pump can continuously suck in and discharge hydraulic oil, forming stable hydraulic energy.

The hydraulic pump needs to be linked with other systems during operation, which requires the action of the transmission shaft and coupling. The transmission shaft transfers the power of the engine to the hydraulic pump, causing it to rotate; The coupling connects the hydraulic pump to the transmission shaft to ensure their synchronous operation.

The control system of the hydraulic pump is responsible for controlling the start, stop, and working pressure parameters of the hydraulic pump. When the excavator needs to work, the control system will send a signal to the hydraulic pump to start and provide the corresponding working pressure.

When the excavator does not need to work, the control system will stop the operation of the hydraulic pump to save energy. In general, the working principle of excavator hydraulic pump is to convert mechanical energy into hydraulic energy through the hydraulic pump body, and transmit it to other hydraulic actuators through the hydraulic system to achieve the action of the excavator.

The operation of hydraulic pumps requires the coordination of the transmission shaft and coupling, and the control system controls its start, stop, and working pressure parameters. The working principle of the excavator hydraulic pump is simple, but it is the key to the normal operation of the excavator.

Only by ensuring the normal operation of the hydraulic pump can the efficiency and performance of the excavator be improved. Therefore, in the operation and maintenance process of excavators, it is necessary to have a clear understanding of the working principle of hydraulic pumps and carry out timely maintenance and upkeep to ensure the normal operation of excavators.

 excavator hydraulic pump

 excavator hydraulic pump

excavator hydraulic pump

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