CN209637930U - An oil pressure regulating and pulsation buffering device - Google Patents

Abstract

The utility model provides a kind of oil pressure and adjusts and pulsation damping device, including a shell, is equipped with oil pressure regulation room and pulsation damping room in shell；Oil pressure regulation room includes oil pressure adjusting cavity and air chamber, is additionally provided with oil return apparatus in oil pressure adjusting cavity；The upper end of oil pressure adjusting cavity is equipped with air chamber, is equipped with pressure-regulating device in air chamber.Pulsation damping room includes pulsation damping chamber and buffer unit；Pulsation damping chamber includes shell, partition and two pieces of secondary diaphragms, and partition is equipped with the oil-through-hole of connection oil pressure adjusting cavity and pulsation damping chamber, and one end that oil-through-hole is located at pulsation damping chamber is equipped with check-valves；Oil outlet is additionally provided on shell.Cooperation in the utility model by air chamber, pressure-regulating device and oil return apparatus stablizes oil pressure adjusting cavity fuel pressure under the pressure set at one, the fuel oil in pulsation damping chamber is flowed under the action of buffer unit, reduces pulsation or noise that fuel oil is generated by a variety of causes.

Description

An oil pressure regulating and pulsation buffering device

technical field

The utility model relates to the field of engines, in particular to an oil pressure regulating and pulsation buffering device.

Background technique

The fuel pressure regulator in the engine is used to adjust the fuel pressure, which is controlled by the system oil pressure and the intake manifold (negative pressure). Its function is to automatically maintain the fuel pressure of the entire oil pressure system at a certain value, so that the difference between the oil pressure in the oil supply main pipe and the pressure in the intake branch pipe is only a certain value. The design problem of the pressure control device often causes the oil pressure in the fuel pressure regulator to be too high or too low. In addition, affected by the diaphragm movement of the oil pressure regulating chamber and the opening and closing of the oil return device, the fuel oil pressure of the fuel supply system will produce certain pulsations and pulsation noises, which will affect the accuracy of fuel injection control if not controlled.

Utility model content

The utility model aims at the deficiencies of the prior art, thereby providing a device that can not only regulate the oil pressure but also buffer the oil pressure pulsation, the specific scheme is as follows:

An oil pressure regulating and pulsation buffering device, comprising a housing, the housing is provided with an oil pressure regulating chamber and a pulsation buffering chamber;

An oil pressure adjustment chamber is provided in the oil pressure adjustment chamber, and the oil pressure adjustment chamber includes the housing, a partition, a first diaphragm, and an oil inlet and an oil return opening on the housing; An oil return device is also provided in the oil pressure regulating chamber; the oil pressure regulating chamber also includes an air chamber, and the air chamber includes the housing, a partition, a first diaphragm, and a valve set on the housing. a vacuum connection; a pressure regulating device is provided in the air chamber, and the pressure regulating device includes a first elastic device that applies a certain elastic pressure to the first diaphragm;

A pulsation buffer chamber and a buffer device are provided in the pulsation buffer chamber; the pulsation buffer chamber includes the housing, a partition and two second diaphragms installed between the housing and the partition, the An oil through hole connecting the oil pressure regulating chamber and the pulsation buffer chamber is provided on the separator, and a check valve is provided at one end of the oil through hole located at the pulsation buffer chamber; the shell of the pulsation buffer chamber There is an oil outlet on the body; the buffer device is used to buffer the pulsation impact in the pulsation buffer chamber, and the buffer device includes two buffer chambers respectively arranged on the upper and lower sides of the pulsation buffer chamber. The chamber includes a second diaphragm and a casing, the casing is provided with a vent hole, and the buffer chamber is provided with a second elastic device for exerting a certain elastic pressure on the second diaphragm.

Based on the above, the oil return device includes a needle valve, the needle valve includes a valve needle and a valve body, and the valve needle includes a handle and a needle-shaped sealing shaft.

Based on the above, one end of the handle is installed on the first diaphragm through the valve needle seat, the needle-shaped sealing shaft is installed on the other end of the handle, and the valve body is installed on the oil return port.

Based on the above, the first elastic device includes an adjusting screw that penetrates and is screwed on the housing, and the adjusting screw includes an adjusting end located outside the housing and an installation end located inside the housing, and the installation end is connected to the housing. One end of an elastic member is fixedly installed together, the other end of the elastic member is fixedly installed with the first diaphragm, and the elastic member is in a squeezed state.

Based on the above, the elastic member includes a base installed with the installation end and several springs with one end installed on the base, and the other end of the spring is fixedly installed with the first diaphragm.

Based on the above, the second elastic device includes several pairs of reverse springs with one end installed inside the housing and the other end fixedly installed with the second diaphragm, and the springs exert a certain pressure on the second diaphragm .

Based on the above, a filter device is provided at the oil outlet of the pulse buffer device.

Based on the above, the filter device includes a filter screen.

Compared with the prior art, the utility model has substantive characteristics and progress, specifically, the utility model has the following advantages:

1. In this utility model, a needle valve is used as the oil return device in the oil pressure regulating chamber. The needle valve includes a valve needle and a valve body. The valve needle is connected with the diaphragm in the oil pressure regulating chamber. The oil return ports are installed together; under normal conditions, the needle valve is in a closed state. When the oil pressure rises, the diaphragm in the oil pressure regulating chamber is affected by the oil pressure to float, and the valve needle also moves accordingly, and the needle valve gradually opens. , the fuel in the oil pressure regulating chamber flows out from the valve body, so that the oil pressure is at a stable value, and the oil pressure control is more sensitive.

2. In the utility model, a pulsation buffer chamber and a buffer device are provided in the pulsation buffer chamber, wherein the buffer device buffers the oil pressure pulsation in the pulsation buffer chamber through several pairs of reverse springs that exert elastic pressure on the pulsation buffer chamber. This structural design not only avoids the influence of spring resonance on the pulsation buffer chamber, but also improves the buffering effect on oil pressure pulsation.

Description of drawings

Fig. 1 is a schematic diagram of the internal structure of the utility model.

In the figure: 1. shell; 2. diaphragm; 3. oil pressure regulating chamber; 4. air chamber; 5. adjusting screw; 6. base; 7. vacuum connection; 8. needle seat; 9. oil inlet 10. Diaphragm seat; 11. Spring; 12. Reverse spring; 13. Pulsation buffer chamber; 14. Valve needle; 15. Valve body; 16. Oil return port; 17. Oil hole; 18. Check Valve; 19. filter screen; 20. oil outlet; 21. air hole; 22. first diaphragm; 23. second diaphragm.

Detailed ways

The technical solutions of the present invention will be further described in detail through specific implementation methods below.

As shown in Figure 1, the utility model provides an oil pressure regulating and pulsation buffering device, which includes a housing 1, and the housing 1 is provided with an oil pressure regulating chamber for adjusting the oil pressure and for controlling the oil pressure pulsation. The pulsation is buffered in two parts of the buffer chamber.

Wherein, the oil pressure regulating chamber is provided with an oil pressure regulating chamber 3, and the oil pressure regulating chamber 3 includes the casing 1, the partition plate 2, the first diaphragm 22 and the inlet opening on the casing 1. Oil port 9 and oil return port 16.

An oil return device is also provided in the oil pressure regulating chamber 3; the oil return device includes a needle valve, the needle valve includes a valve needle 14 and a valve body 15, and the valve needle 14 includes a handle and a needle-shaped sealing shaft. One end of the handle is installed on the first diaphragm 22 through the valve needle seat 8, and the needle-shaped sealing shaft is installed on the other end of the handle. The needle-shaped sealing shaft is connected to the through hole of the valve body 15 under normal conditions Fit together, and the valve body 15 is installed on the oil return port 16 .

The oil pressure regulating chamber also includes an air chamber 4 , and the air chamber 4 includes the casing 1 , the partition plate 2 , the first diaphragm 22 and the vacuum connection 7 provided on the casing 1 .

A pressure regulating device is provided inside the air chamber 4 , and the pressure regulating device includes a first elastic device that exerts a certain elastic pressure on the first diaphragm 22 . The first elastic device includes an adjusting screw 5 that passes through and is screwed on the housing 1. The adjusting screw 5 includes an adjusting end located outside the housing 1 and an installation end located inside the housing 1. The installation end The end is fixedly installed with one end of an elastic member, and the other end of the elastic member is fixedly installed with the first diaphragm 22 .

For ease of installation and use, the elastic member includes a base 6 installed together with the installation end and several springs 11 installed on the base 6 at one end, and the other end of the spring 11 is connected to the first Diaphragm 22 is fixedly installed.

Under normal conditions, the elastic member is in a squeezed state, and a certain pressure is applied to the first diaphragm 22 to set the oil pressure in the oil pressure adjustment chamber 3; by rotating the adjustment end, the elasticity can be changed. The extrusion state of the parts, that is, change the oil pressure setting value in the oil pressure regulating chamber 3.

It should be noted that the vacuum connection pipe 7 is connected to the throttle valve. When the throttle valve opening is small, the intake pipe and the air chamber 4 are under high vacuum and low pressure. The diaphragm moves up against the force of the spring 11, and the valve needle 14 also moves up. Open the needle valve to return the fuel; when the throttle valve opening is large, the intake pipe and the air chamber 4 are high pressure with low vacuum, and the diaphragm moves downward under the joint action of the air pressure and the force of the spring 11, and the needle valve moves downward. gradually close. The needle valve can realize precise control of the oil return volume during the gradual opening or closing process.

A pulsation buffer chamber 13 and a buffer device are arranged in the pulsation buffer chamber; the pulsation buffer chamber 13 includes the housing 1 , a partition 2 and two second Diaphragm 23, the separator 2 is provided with an oil through hole 17 connecting the oil pressure regulating chamber 3 and the pulsation buffer chamber 13, and the oil through hole 17 is located at one end of the pulsation buffer chamber 13. The check valve 18, through this structural design, the fuel can only flow in one direction from the oil pressure regulating chamber 3 to the pulsation buffering chamber 13.

The housing 1 on the pulsation buffer chamber 13 is provided with an oil outlet 20; the buffer device is used to buffer the pulsation impact in the pulsation buffer chamber 13, and the buffer device includes 13 Two buffer chambers on the upper and lower sides, the buffer chamber includes a second diaphragm 23 and a housing 1, the housing 1 is provided with a vent hole 21 connected to the atmospheric pressure, and the buffer chamber is provided with a The second elastic means that the two diaphragms 23 apply a certain elastic pressure.

The second elastic device includes one end installed on the inner side of the housing 1, and the other end fixedly installed with the second diaphragm 23 through the diaphragm seat 10. The diaphragm 23 exerts a certain pressure, and the reverse spring 12 buffers the oil pressure pulsation, which not only avoids the influence of the spring resonance on the pulsation buffer chamber, but also plays a better buffering effect on the oil pressure pulsation.

In addition, a filter device is provided at the oil outlet 20 of the pulse buffer device, including a filter screen 19 for filtering impurities in the fuel.

When in use, the fuel enters the oil pressure regulating chamber 3 from the oil inlet 9, and under the action of the pressure regulating device, the oil pressure in the oil pressure regulating chamber 3 has a certain pressure, and enters the pulsation buffer chamber 13 through the oil through hole 17, and passes through The buffered fuel flows out from the oil outlet 20 for combustion.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model and not to limit it; although the utility model has been described in detail with reference to the preferred embodiment, those of ordinary skill in the art should understand that: still The specific implementation of the utility model can be modified or some technical features can be equivalently replaced; without departing from the spirit of the technical solution of the utility model, all of them should be included in the scope of the technical solution claimed by the utility model.

Claims (8)

1. An oil pressure regulating and pulsation buffering device, characterized in that: it comprises a housing in which an oil pressure regulating chamber and a pulsation buffering chamber are arranged; An oil pressure adjustment chamber is provided in the oil pressure adjustment chamber, and the oil pressure adjustment chamber includes the housing, a partition, a first diaphragm, and an oil inlet and an oil return opening on the housing; An oil return device is also provided in the oil pressure regulating chamber; the oil pressure regulating chamber also includes an air chamber, and the air chamber includes the housing, a partition, a first diaphragm, and a valve set on the housing. a vacuum connection; a pressure regulating device is provided in the air chamber, and the pressure regulating device includes a first elastic device that applies a certain elastic pressure to the first diaphragm; A pulsation buffer chamber and a buffer device are provided in the pulsation buffer chamber; the pulsation buffer chamber includes the housing, a partition and two second diaphragms installed between the housing and the partition, the An oil through hole connecting the oil pressure regulating chamber and the pulsation buffer chamber is provided on the separator, and a check valve is provided at one end of the oil through hole located at the pulsation buffer chamber; the shell of the pulsation buffer chamber There is an oil outlet on the body; the buffer device is used to buffer the pulsation impact in the pulsation buffer chamber, and the buffer device includes two buffer chambers respectively arranged on the upper and lower sides of the pulsation buffer chamber. The chamber includes a second diaphragm and a casing, the casing is provided with a vent hole, and the buffer chamber is provided with a second elastic device for exerting a certain elastic pressure on the second diaphragm. 2. The oil pressure regulating and pulsation buffering device according to claim 1, wherein the oil return device includes a needle valve, the needle valve includes a valve needle and a valve body, and the valve needle includes a handle and a needle shaped seal shaft. 3. The oil pressure regulating and pulsation buffering device according to claim 2, characterized in that: one end of the handle is mounted on the first diaphragm through a valve needle seat, and the needle-shaped sealing shaft is mounted on the The other end of the handle, the valve body is installed on the oil return port. 4. The oil pressure regulating and pulsation buffering device according to claim 3, characterized in that: the first elastic device includes an adjusting screw that penetrates and is screwed on the housing, and the adjusting screw includes a The external adjustment end and the installation end located inside the housing, the installation end is fixedly installed with one end of an elastic member, the other end of the elastic member is fixedly installed with the first diaphragm, and the elastic member is in extruded state. 5. The oil pressure regulating and pulsation buffering device according to claim 4, characterized in that: the elastic member includes a base installed with the installation end and several springs with one end installed on the base , the other end of the spring is fixedly installed with the first diaphragm. 6. The oil pressure regulating and pulsation buffering device according to claim 5, characterized in that: the second elastic device includes a plurality of elastic devices with one end installed inside the housing and the other end fixedly installed with the second diaphragm. For the reverse spring, said spring exerts a certain pressure on said second diaphragm. 7. The oil pressure regulating and pulsation buffering device according to any one of claims 1-6, wherein a filter device is provided at the oil outlet. 8. The oil pressure regulating and pulsation buffering device according to claim 7, wherein the filtering device comprises a filter screen.