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PCY14-1B Constant Pressure Variable Piston Pump

CY14 axial piston pump is an axial piston pump with oil distribution plate and rotating cylinder block It has the advantages of simple structure, small size, high efficiency, long life, light weight and strong self-priming ability...

Product details

Product Overview:

CY14 axial piston pump is an axial piston pump with oil distribution plate and rotating cylinder block. Because the hydraulic static balance structure is adopted between the sliding shoe and the variable head, and between the oil distribution pan and the cylinder block, it has the advantages of simple structure, small volume, high efficiency, long life, light weight and strong self-priming ability compared with other types of pumps. It is suitable for machine tools, forging, metallurgy, engineering, mining and other machinery and other hydraulic transmission systems. The pump can also be used as a hydraulic motor only by changing the motor oil distribution pan.

Type Description:

Working Principle:

The main part (see structure profile) is driven by the drive shaft to rotate the cylinder block, so that the seven plungers evenly distributed on the cylinder block rotate around the center line of the drive shaft, and the slide shoe in the column slide assembly is pressed against the variable head (or swash plate) through the center spring. In this way, the plunger reciprocates with the rotation of the cylinder block to complete the oil absorption and oil pressure action.
This variable type of pump, when the output pressure is less than the set constant pressure, the full displacement output pressure oil, that is, quantitative output, when the output oil pressure reaches the set pressure, it automatically adjusts the pump flow to ensure constant pressure and meet the requirements of the system. The output constant pressure value of the pump can be adjusted stepless within the pressure adjustment range as required. The structure of the pump is shown in Figure 6, which simultaneously passes the output pressure oil to the lower chamber of the variable piston and the control oil inlet of the constant pressure valve. When the output pressure is less than the adjusted constant pressure, the oil pressure thrust acting on the constant pressure spool is less than the adjusted spring force, and the constant pressure valve is in the open state. The pressure oil enters the upper cavity of the variable piston, the variable piston is pressed at the lowest position, and the full displacement of the pump outputs the pressure oil; When the pump is working at constant pressure adjustment, the hydraulic thrust acting on the constant pressure valve core is equal to the adjusting spring force, and the oil inlet and outlet of the constant pressure valve are open at the same time, so that the hydraulic thrust of the upper and lower cavities of the variable piston are equal, and the variable piston is balanced at a certain position. If the hydraulic damping (load) is increased, the oil pressure will rise instantaneously, and the oil outlet of the constant pressure valve will be opened larger and the oil inlet will be closed smaller. Compared with the lower chamber, the pressure of the upper chamber of the variable piston decreases, the variable piston moves upward, and the flow rate of the pump decreases until the pressure drops to the fixed constant pressure, at which time the variable piston works in the new equilibrium position. Conversely, if the hydraulic damping (load) decreases, the oil pressure drops instantaneously, the oil inlet of the constant pressure valve opens larger, the oil discharge port closes smaller, the oil pressure in the upper chamber of the variable piston increases compared with that in the lower chamber, the variable piston moves downward, and the flow rate of the pump increases until the pressure rises to the adjusted constant pressure.
 

Structural Section:


 

Characteristic Curve:


 

Overall Dimension:


 

Technical Parameter:

Size | Type

10PCY

25(40)PCY

63(80)PCY

160PCY

250(400)PCY

A

φ 125

φ 150

φ 190

φ 240

φ 280

B(f9)

φ 75

φ 100

φ 120

φ 150

φ 180

C

27.5

32.5

42.8

59

63.9

D(h6)

φ 25

φ 30

φ 40

φ 55

φ 60

E

4

4

4

4

5

F

30

45

50

100

100

G

40

52

60

106

110

H

41

54

62

110

112

I

86

104

122

180

212

J

109

134

157

230

272(277)

K

194

246

300

411

492(502)

L

71

83

108

141

170

M

M14 × 1.5

M14 × 1.5

M18 × 1.5

M22 × 1.5

M22 × 1.5

N

M10

M10

M12

M16

M20

P

     

M16

M20

Q(h9)

8

8

12

16

18

R

φ 100

φ 125

φ 155

φ 198

φ 230

S

142

172

200

340

420

T

M22 × 1.5

M33(M42) × 2

M42(M48) × 2

φ 55

φ 64( φ 66)

U

     

φ 64

φ 76

X

294

362

439

595

690(700)

Y

258

317

390

533

629(639)

Z

50

66

74

100

100

EE

101

120

140

173

210

FF

255

280

329

396

465