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PCY14-1B constant pressure variable displacement piston pump

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Model Description

 

PCY14-1B constant pressure variable displacement piston pump

 

Structural cross section

 

PCY14-1B constant pressure variable displacement piston pump

 

Working principle

 

PCY14-1B constant pressure variable displacement piston pump

 

The main body part (see structural section) is driven by the drive shaft to rotate the cylinder, so that the seven plungers evenly distributed on the cylinder body rotate around the center line of the transmission shaft, and the sliding shoe in the column sliding assembly is pressed against the variable head by the central spring ( Or swashplate). Thus, the plunger reciprocates as the cylinder rotates, completing the oil absorption and oil pressure action.
 
In this variable type pump, when the output pressure is less than the set constant pressure, the full displacement output pressure oil, that is, the quantitative output, automatically adjusts the pump flow when the output oil pressure reaches the set pressure to ensure constant pressure. , to meet the requirements of the system. The output constant pressure value of the pump can be adjusted steplessly within the pressure regulation range according to the need. The structure of the pump is shown in Figure 6. The structure connects the output pressure oil to the variable piston lower chamber and the constant pressure valve control oil. At the inlet, when the output pressure is less than the set constant pressure, the hydraulic pressure acting on the constant pressure valve core is less than the set spring force, the constant pressure valve is in the open state, the pressure oil enters the upper chamber of the variable piston, and the variable piston is pressed at the lowest position. The pump discharges the pressure oil at the full displacement; when the pump is working at the constant pressure, the oil pressure acting on the constant pressure valve core is equal to the set spring force, and the inlet and outlet ports of the constant pressure valve are simultaneously opened, so that The oil pressure of the upper and lower chambers of the variable piston is equal, and the variable piston balance works at a certain position. If the hydraulic damping (load) is increased, the oil pressure is instantaneously increased, the oil pressure port of the constant pressure valve is opened, the oil inlet is closed, and the variable is small. In the upper chamber of the piston, the pressure in the lower chamber is lowered, the variable piston is moved upward, and the flow rate of the pump is reduced until the pressure drops to a constant pressure, at which time the variable piston operates in a new equilibrium position. Conversely, if the hydraulic damping (load) decreases, the oil pressure drops instantaneously, the inlet port of the constant pressure valve opens, the drain port closes, the upper chamber of the variable piston is higher than the lower chamber, and the variable piston moves downward, the pump The flow rate increases until the pressure rises to a constant pressure.
 
 
Model specification

 

Model PCY14-1B

Nominal pressure Mpa

Nominal displacement ml/r

Theoretical flow L/min

Maximum transmission power Kw

Maximum theoretical torque N*m

1000r/min

1500r/min

1000r/min

2.5

31.5

2.5

2.5

3.75

1.43

17.5

10

31.5

10

10

15

5.7

54.6

25

31.5

25

25

37.5

14.1

134.9

40

31.5

40

40

60

22.6

201.5

63

31.5

63

63

94.5

35.8

339.9

80

31.5

80

80

120

46.6

405.1

160

31.5

160

160

240

92.2

880.3

250

31.5

250

250

375

133.2

1272.4

400

31.5

400

400

-

199.5

1905.2

At a nominal pressure of 31.5 MPa, 1.25, 5, 13, 16, 32, 100 ml/r displacement specifications are also derived.

Corresponding parameter set not found, please add it in property template of background
暂未实现,敬请期待
暂未实现,敬请期待
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