What is the function of the outlet valve? The role of the oil water discharge valve

The oil outlet valve is a one-way valve, under the action of spring pressure, the upper cone surface of the valve is closely matched with the valve seat, and its function is to isolate the high-pressure oil pipe from the cavity at the upper end of the plunger when the supply is stopped, so as to prevent the oil in the high-pressure oil pipe from flowing back into the fuel injection pump.

Function. 1) Prevent oil dripping before fuel injection and improve injection speed: When the fuel injection pump is supplied, after the oil pressure is higher than the preload of the spring of the oil outlet valve and the residual pressure in the high-pressure oil pipe, the oil outlet valve is raised, and its sealing cone leaves the valve seat.

Fuel from the pump chamber must not enter the high-pressure tubing until the pressure reducing belt on the outlet valve is completely out of the pilot hole of the valve seat.

2) Prevent oil dripping after oil injection and increase the closing speed: when the oil supply is stopped, the passage between the high-pressure oil pipe and the pump chamber will be cut off when the lower edge of the pressure reducing belt of the oil outlet valve enters the conduit. When the oil outlet valve is completely seated, it drops a distance h, so that the volume of the high-pressure oil pipe is increased, so that the oil pressure drops rapidly by 1MPa 2MPa, and the oil is cut off quickly and simply, which prevents the oil from dripping after spraying due to the fluctuation of oil pressure and "pipe shrinkage and oil rise".

3) Prevent fuel backflow and maintain a certain residual pressure in the high-pressure oil pipe.

Improvements. 1. The structural size of the original oil outlet valve is milled in six directions at the small end, and one end of the lock nut is turned out of an annular groove to reserve the welding cavity. Design a pressure cap, the left side is left with six can be fastened with a wrench, and the right edge just enters the reserved groove of the inner hexagonal sliding sleeve, the purpose is to prevent scratching when entering and exiting the pump barrel.

2. Design a sliding fixed sleeve with inner and outer hexagons, and mill out hexagonal outside the inner hexagonal sliding fixed sleeve to ensure that there is enough oil channel. The inner hexagonal is equal to the outer hexagonal of the fixing nut and the outer hexagonal of the small end of the oil outlet valve. When connecting, first screw the pressure cap into the sucker rod, then install the lock nut and adjust it to a predetermined position and weld to form a fixed nut, after the inner hexagonal sliding fixed sleeve is pushed in, the oil outlet valve is screwed in, and then the inner hexagonal sliding fixed sleeve is sleeved into the hexagonal oil outlet valve hexagonal and the fixed nut hexagonal, at this time the oil outlet valve hexagonal and the fixed nut hexagonal are exactly aligned, which is adjusted in the predetermined position.

After the inner hexagonal sliding fixed sleeve is sleeved into the hexagonal body, a circumferential fixation is formed, and finally the pressure cap is returned and screwed into the compression, and the friction and lock on the immovable surface of the fixing nut are locked, and the axial position of the shaft sleeve of the inner hexagonal sliding sleeve is limited by the outer edge of the pressure cap, so as to form a firm lock.

3. The oil outlet valve is connected with the plunger by the original fixed joint designed as a movable joint, which is composed of the left and right joints and the slip coupling, and after the slip coupling connects the left and right joints, the left and right joints can rotate freely. When the plunger and the pump barrel are stuck and cannot rotate freely, the movable joint can rotate freely, so as to ensure the effective connection of the thread and will not loosen. The new structural design is characterized by:

The structure is simple and reliable, does not change the working structure parameters, the work is not affected, can be repeatedly disassembled and assembled, the processing and production are simple, and it is convenient for on-site assembly.

1.The important role of the cut-off valve is the shut-off effect. It is to close (close) the fluid in the pipeline, not to make it flow, in general, the valves of various pipelines mainly play a shut-off role.

2.Another important role of the regulating valve is to adjust the flow rate, adjust the medium flow rate, temperature, pressure, liquid level and other parameters according to the working conditions or requirements, and the flow control depends on the size adjustment of the valve opening. [Electric Regulating Ball Valve Electric Regulating Butterfly Valve Pneumatic Regulating Ball Valve Pneumatic Regulating Butterfly Valve]3

Anti-reversal Some pipes require a moderate flow rate to flow in one direction and do not allow for reverse flow or rewind. This requires the use of a check valve (or check valve). It refers to a valve that automatically opens and closes the disc and is used to prevent the backflow of the medium.

It is an automatic valve. Its main function is to prevent the reverse flow of the medium, the reverse rotation of the spine of the pump and the drive motor, and the discharge of the container medium. 4.

The safety chamber imitates that when the fluid pressure is too high, in order to prevent the pressure inside the high-pressure vessel from exceeding the pressure limit of the vessel, it may occur**. Therefore, a valve capable of automatically releasing pressure at a certain pressure is installed on the vessel, often referred to as a safety valve. For example, in boilers, compressed air tanks.

The functions of the automobile gasoline valve are: 1. Ensure that the fuel pressure in the automobile oil circuit is normal; 2. Adjust the fuel pressure entering the injector according to the change of intake manifold pressure.

The function of the gasoline pressure regulating valve is to ensure the normal fuel pressure in the oil circuit of the car, the working principle is that the oil pressure is coordinated by the spring and the vacuum degree of the air chamber, when the oil pressure is higher than the standard value, the high-pressure fuel will move up the diaphragm, the ball valve is opened, and the excess fuel will regurgitate the fuel tank through the return pipe; When the pressure is lower than the standard value, the spring will press down on the diaphragm to close the ball valve and stop the oil return.

The flow control valve can be directly set according to the design under the action of water, and the valve can automatically eliminate the flow deviation caused by the residual pressure head and pressure fluctuation of the pipeline under the action of water, and keep the set flow unchanged no matter how the system pressure changes.

The network adjustment work is turned into a simple flow distribution, and the hydraulic imbalance of the pipe network is effectively solved. The flow control valve is mainly used in water systems such as central heating (cold) to distribute the flow of the pipe network on demand, eliminate the hydraulic imbalance of the water system, and solve the problem of uneven cold and heat.

Extended informationDue to the advantages of pneumatic control valves with intrinsic explosion-proof and reliable performance, domestic and foreign control valves are still mainly pneumatic.

In the past, the small flow control valve was officially produced in China. The maximum operating pressure can reach 100 kg cm2 and the rated flow capacity c value can be reached.

The seat aperture is 3 mm, the spool is cylindrical, one or more V-grooves are engraved on it, the stem stroke is 6 mm, and the valve has no matching positioner, so the control accuracy is poor.

China has also introduced small flow control valves. The flow capacity is approx. and the spool is cylindrical with notches. The working pressure is 300 kg cm2 stem stroke 7 16 inches, the spool is conical, and the valve comes with a Moore top-mounted positioner.

These valves are characterized by simple structure and light weight. Commonly used seat bore diameters are 1 8 1 4 inches (approx. mm) and stem travel is 1 4 l 2 inches (mm). The flow capacity of these valves can be as small as possible or even smaller.

Photo by Pacific Automobile Network Q&A).

The valve body oil is a special oil for the automatic transmission to control the valve body, and the performance characteristics of the valve body oil are good fluidity, lubrication and anti-foam performance. The body oil used in a dry double-off gearbox refers to the transmission oil, which needs to be changed regularly. Because the parts of the gear set need to be lubricated during the working process of the gearbox, if the gearbox oil is not replaced for a long time, it will lead to abnormal gearbox work.

The following is more introduction: 1. Generally speaking, the replacement cycle of transmission oil is two years or 40,000 kilometers, which is the replacement cycle of transmission oil in the process of normal use. 2. The newly replaced transmission oil is red, and after a period of use, the transmission oil will become black, so the transmission oil must be replaced in time after a certain period of time, otherwise the transmission oil will be doped with some impurities, which will increase the wear and tear of the gears inside the gearbox.

3. When replacing the gearbox oil, it is necessary to choose the gearbox oil suitable for the viscosity of the gearbox, if the viscosity of the gearbox oil used is too large, the gearbox will overheat the friction surface in the process of working, resulting in unnecessary power loss, if the viscosity of the gearbox is small, the gearbox is prone to oil leakage. 4. According to the different types of transmissions, transmission oil is also divided into manual transmission oil and automatic transmission oil.