SU478124A1 - Pump installation - Google Patents

Description

c: wasp, and the working areas of the ends of the valve spool, which are under pressure in the control chambers, are proportional to the volume of the pump sections connected to these chambers. With a constant value of the valve spring force, the pressure in the pressure LIVII of the pumping unit, at which the safety valve opens, will decrease in proportion to the increase in the flow rate of the pump. Thus, the pump power, determined by the product of the flow rate and the greatest pressure, remains constant when connecting to the system of ifacoca sections in any combination. : The drawing shows the hydraulic diagram of a pumping unit with a two-piece unregulated double-flow pump. Masos 1 has sections 2, 3 and is driven by an electric motor 4. Distributor 5 allows you to connect either of the pump sections or both sections to the system simultaneously. Safety valve: 6 limits | The highest pressure of fluid delivered to the system. The pressure lines 7, 8 connect the seeders 2, 3 to the distributor 5, from which the liquid is discharged into the system via the pressure line 9. The link K) connects the circuit 9 to the KJicUiaaoM 6. ffo drain line 11, 12 the liquid is discharged into the tank control valve and valve 6. Control lines 13, J4 connect from pressure lines 7, 8 to control chambers 15, 16 of valve 6. SojioTtJHK 17 valve 6 is clamped by spring 8, the tension of which is adjusted by screw 19. working areas of spool turn valves 17, which are affected by pressure in the chambers 1.5, 1c, are proportional to the volume flows connected to these chambers sections 2 and 3. When the pump unit is operating at the first stage of distribution; p1te; pz 5 switches to the pragmatic position, section 2 supplies fluid to the system and pressure line 8 of section 3:; connected to drain line 11, flow rate of the fluid supplied to the system is equal to the volumetric feed Q of section 2. The maximum pressure 1e P in line 9 at this stage is determined by the tension F of the spring 18 of valve 6 and the area f of the end face of the spool 17, which is under pressure in the control chamber 15:

 etc

PI. yax f

Be pump at this stage: max) 0 |

612 rjf

6.12

P.

Subject invention

1. A pump installation containing an unregulated multi-pump pump, a rasdel, predelkhel pl sobi; psg ptpo.tyh 4 where G1 - kpd pump. When the pumping unit is operating at the second stage, the distributor 5 switches to the middle position, section 3 supplies fluid to the system, and pressure line 7 of section 2 is connected to drain line 11. The flow rate of the fluid supplied to the system, C of section 3. Equal volume flow of linear 9 at this higher pressure P, the steps are determined by the same spring force and the area of the end face of the spool 17, which is under pressure in the control chamber 16: 1P- ° P f Pump power at this stage: J2naKC0.a - Рпр. When the pumping unit is operating at the third stage, the distributor 5 switches to the left position, the flow rate Q O is fed into the system from both sections. Most likely this level: General pressure Р- -Рпр Змакс f, f а. My pump vacuum at this stage: -) PnplQi-Qa) m -612 ft 6Uti (f,) | Since the areas fi 9 are proportional to the corresponding} Г 1о Q and Q: li-iar- -K: COnS-k 1 -Гг, when summing up the expenses X Q-ZKf .:. the ratio of the amount of expenses to the amount of money; bzK con5i riosTOiviy for the considered example: Maxmax Max Mark, and in the general case a multi-compartment non-adjustable multithreaded pump with a valve, which, .fst: the pump potential for any combination in connecting the pump section to the system does not exceed the value