The hydraulic pump (manual) in the industrial field is quite in demand. Its main task can be called the pumping of fuels and lubricants. At the same time, the models have their own permissible viscosity norm. Additionally, the devices differ in their design. The main element of a hand pump can be called a dispensing pipe. In some cases, telescopic intakes are used instead.
How is it arranged?
A standard hand-operated (hydraulic) pump has a simple device. At the bottom of the housing is a test hose. It is attached to the mechanism through a special hole using clamps. Above in the hand pump there is a valve that controls the pressure. By turning it clockwise, you can adjust the pumping power.
There is a plug to fill the tank. Under it is a small port that is designed to connect to a common system. Also in the mechanism there is a separate tank with a pipe for fluid. The hydraulic cylinder with a hand pump is threadedly connected. To adjust the valve intensity, manufacturers install special regulators. With their help, you can easily change the pressure. At the same time, the pump handle is mounted separately, which is fixed with a plug.
Scheme of a manual pump for pumping oil
To pump large quantities of oil, a robust hydraulic cylinder is required (manual hydraulic pump circuit shown below). As a rule, it is reinforced with a small support. As a result, it is possible to fix it more tightly. Additionally, bolts are used for this.
Among other things, the hand pump has a hydraulic tube. Its main task is to supply pressure to the cylinder. For this, a tee is installed in the device. It is mounted on a special pillow, which is fixed on the washer. It is also fixed with nuts. A rubber band is used for the holder in the hand pump. In this case, the fitting is located in the lowermost part.
Pump Repair
In order to repair a hydraulic hand pump, you need to know as much as possible about the breakdown. First of all, you should take a look at the indicators of the pressure gauge. If the pressure deviates from the norm, this is due to the central reservoir, the tightness of which may be impaired. In order to replace it, you need a standard set of tools. First of all, unscrew the upper sleeve and disconnect the handle of the hydraulic pump. Next, carefully remove the protective washer.
After that, it is possible to disconnect the plug. Directly below it is a reservoir. If the external examination does not show obvious deformation, it is necessary to twist the shut-off valve from it. After that, experts advise checking the valve’s performance. If he sits quite tight, you need to lubricate it. After this, the mechanism should be folded and checked for operability.
The second common problem with pumps is considered to be the erasure of a rubber plug. In this case, it can simply be replaced. In this case, it is necessary to find out its exact diameter and thickness. After completion of repair work, the entire mechanism also needs to be lubricated.
How to create home-made models?
Today, home-made devices of this type are quite rare. However, you can make a hydraulic pump (manual) with your own hands. First of all, they use a steel tank as a body. To control the pressure in it, a valve is needed. It is mounted at the top with a washer. A lever is used to adjust the shut-off valve. In this case, you can use a cast iron pipe. A pressure gauge should be installed to control the pressure.
You will need a sleeve with a pipe, which will not allow the valve to twist. As a result, you can add up a device that can withstand pressure not more than 4 atm. A distinctive feature of homemade hand pumps are large dimensions. And to bring the lever to work, great effort should be made. Given all of the above, such devices are considered ineffective, and are rarely used in industry.
Hydraulic pumps NRG
HP pumps are reliable sources of pressure. Moreover, they can be connected to various hydraulic systems. The hydraulic manual pump -7007 has a nominal tank volume of 0.7 liters. Moreover, its useful volume is 0.6 liters, and the pressure of this modification is able to withstand 1.3 MPa. In general, her performance is pretty good. If we consider high pressure pumps, then the device NRG-7110 deserves attention.
The nominal volume of the tank is a whole 1 liter. In this case, the maximum pressure is maintained at around 2.7 MPa, and the force on the handle must be applied at 50 kgf. The dimensions of this modification are as follows: width - 310 mm, height - 320 mm, and length - 750 mm. The hydraulic pump (manual) NGR-7016 has a nominal tank volume of 16 liters. At the same time, its useful volume is 14 liters. The pressure in the first stage is maintained at 2.7 MPa, and the system performance is 113 cubic meters. see in one move. This pump weighs hydraulic (manual) as much as 29 kg.
Distributor pumps
Manual pumps of the NRG series are produced in some cases with valves. These models in the name have the letter "P", so they can be recognized by anyone. A distinctive feature of these devices is considered to be high ultimate pressure. At the same time, they have installed tanks of various diameters. If we consider the modification of the NRG-7020P, then the useful volume of the chamber is exactly 2 liters, and the pressure is maintained at around 3 MPa.
The performance of the device in the second degree is 113 cubic meters. see on the move. In this case, the force on the handle should be applied at 55 kgf. This pump weighs hydraulic (manual) 22 kg. If we consider the model NRG-67016R, then the nominal volume of the tank is 14 liters, the pressure "maximum" is maintained at around 4 MPa. The performance of the mechanism in the second stage is 115 cubic meters. cm per move. The device weighs exactly 30 kg when assembled.
Single acting system
In order to connect a hand-operated hydraulic pump to a single-acting system, a special adapter is required. It is admitted, as a rule, with a manometer. The most common modification of the adapter is considered to be the model "MA100". Additionally, a hose of at least three meters in length is required. Its end must be connected to the coupling half. The system must also include an actuator.
Hand pumps with safety valve
A distinctive feature of these devices is a powerful valve that can withstand heavy loads. It is connected to the system, usually through a regular adapter. In addition, a half coupling of the BRS class is used. For work, you will need an adapter that will be attached to the crane. Through the adapter, the pump can be connected to the actuator.
Double acting hydraulic system
The double-acting hydraulic system requires a standard adapter as well as a pump. In this case, the coupling half is used by the BRR series. It should also be noted the possibility of connecting the rod to the system, and this is done to return the stroke. By default, one hydraulic pipe is assumed, but several pieces can be connected. In order to dock the pump with the actuator, use a special hydraulic lock. It is installed immediately on two connectors. In this case, the pressure can jump up to 3 MPa.
In this case, you should constantly monitor the pressure gauge. After installing the hydraulic lock, tighten all the bolts and check the stem for proper operation. In addition, it should be noted that the protective sleeves in this system can only be used in UGZ class. This is due to the fact that it is necessary to connect to the actuator precisely on two connectors.
How do hand pumps work from the station?
The hand pump can be connected to the station only with the help of an adapter series . In this case, the standard connection scheme provides for the presence of a drain pipe. It is produced with the marking "T". Additionally, a valve is required that will regulate the pressure. Directly, the coupling half of the device is attached to the second hose. In this case, the central stem is not used. This is due to the lack of a hydraulic lock.
Ultimately, the system must be locked to the actuator. In order to check the operation of the pump, fully tighten the valve until it stops. Next, the actuator is turned on. At this time, the pressure gauge should not show pressure. If any problems occur, the circuit should be fully checked for continuity.
The arrangement of pumps with a coupling half
Volumetric cylinders are considered a feature of half-coupled pumps. At the same time, they are attached to the camera with the help of special clamps that are fixed on bolts. Additionally, there is a protective washer that locks the central stem. Directly below it is a small tee that connects to the sleeve of the hand pump.
For its stability, as a rule, use a small pillow. It is attached to the body on two bolts with washers. Immediately behind it is the first air tube. In this case, the pressure regulator is located further. The second tube in many versions is connected to a tee. In this case, a spring washer is installed on it. In this case, it gives her the ability to change position when the handle is pressed. The coupling half is screwed directly onto the fitting of the hand pump.
Scheme of the device from an electric petrol drive
In this case, a jack or a puller can act as an actuator. In this case, the station is attached directly to the pump directly. Only rubber clamps that provide high grip are used for this. The pressure gauge is standardly installed near the actuator.
Mention should be made of a crane. For normal operation of the hand pump, it must be two-way. In this case, the air tank will withstand any load. The safety valve in this system is mounted immediately above the high pressure sleeve.
High pressure pump
A distinctive feature of high pressure pumps is a robust sleeve. In this case, the valve is installed plunger type. It is attached to the body with two bolts. So the connection is pretty tough. There is a large lever to adjust the operation of the device. The back cover of the hand pump is locked using the clamping rod. It, in turn, is connected to a reservoir of air.
The Hansa-014T manual high-pressure hydraulic pump is capable of withstanding a maximum load of up to 700 bar. At the same time, it is intended exclusively for mineral oil. It is also permitted to use distilled water. The adjustment of this modification is quite simple. For this purpose, the sample is equipped with a rotary valve. In addition, a durable 1 meter long hose should be noted.
In turn, the Hansa-015T manual high-pressure hydraulic pump is a more powerful prototype. It is capable of withstanding a maximum load of 800 bar.
An additional nut is provided to protect the system. The reservoir of this model is made of aluminum. In this case, the central stem is made of copper. It should also be noted that the entire body is made of stainless steel. In this case, the handle is rubberized and very comfortable, and this unit weighs about 25 kg when assembled.