Piston cooling nozzle and engine

Abstract

The invention relates to a piston cooling nozzle and an engine, the piston cooling nozzle comprises a nozzle valve body and a plunger piston body, the nozzle valve body is provided with an oil inlet and an oil outlet, the oil inlet and the oil outlet are respectively communicated with a valve cavity of the nozzle valve body, the plunger piston body is elastically arranged in the valve cavity, and the plunger piston body is provided with an oil storage cavity communicated with the oil inlet. A flow adjusting opening is formed in the side wall, opposite to the oil outlet, of the plunger body, the flow adjusting opening is used for being communicated with the oil outlet when the plunger body moves to a first preset position in the direction away from the oil inlet relative to the nozzle valve body, and the width of the flow adjusting opening is gradually increased from the end away from the oil inlet. According to the piston cooling nozzle, by designing the shape and the size of the flow adjusting opening, the output flow of the piston cooling nozzle can change along with the change of the oil pressure, so that the cooling requirements of pistons under different working conditions are met, the structure is simple, dependence on an electric control system is avoided, and the requirement for the arrangement space is low.

Description

Technical Field

[0001] The invention relates to the technical field of engines, and in particular to a piston cooling nozzle and an engine. Background Art

[0002] The piston cooling nozzle is an important component for cooling the piston in the engine cavity and reducing the thermal load of the piston.

[0003] There are mainly two types of existing piston cooling nozzles. One type of piston cooling nozzle only has the functions of opening and closing, and cannot meet the requirement that the nozzle flow rate changes with random oil pressure, which easily causes excessive cooling of the piston at low speeds. The other type of piston cooling nozzle relies on a solenoid valve to control the flow rate, and a separate oil channel interface needs to be arranged to install the solenoid valve. At the same time, sufficient space is required for the installation of the solenoid valve and the wiring harness. The layout space requirements are large and the electronic control system is complex. Summary of the invention

[0004] The first object of the present invention is to provide a piston cooling nozzle with a simple structure, small layout space requirement, and the ability to change the output flow rate in response to changes in the random oil pressure.

[0005] A second object of the present invention is to provide an engine comprising the above-mentioned piston cooling nozzle.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A piston cooling nozzle, comprising:

[0008] A nozzle valve body, wherein the nozzle valve body is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively connected to the valve cavity of the nozzle valve body;

[0009] A plunger body, wherein the plunger body is elastically arranged in the valve cavity, the plunger body is provided with an oil storage cavity connected with the oil inlet, and a flow regulating port is provided on the side wall of the plunger body opposite to the oil outlet, the flow regulating port is used to communicate with the oil outlet when the plunger body moves to a first preset position in a direction away from the oil inlet relative to the nozzle valve body, and the width of the flow regulating port gradually increases from the end away from the oil inlet.

[0010] In one embodiment of the present application, the nozzle valve body is provided with an oil drain port connected to the valve cavity of the nozzle valve body, and the oil drain port is located on the side of the oil outlet away from the oil inlet, and the oil drain port is used to connect with the flow regulating port when the plunger body moves to a second preset position relative to the nozzle valve body in a direction away from the oil inlet.

[0011] In one embodiment of the present application, a non-rotation fit structure is provided between the plunger body and the nozzle valve body, so that the plunger body can and can only slide reciprocatingly relative to the nozzle valve body along a preset direction.

[0012] In one embodiment of the present application, a nozzle tube is further included, and the nozzle tube is connected to the oil outlet.

[0013] In one embodiment of the present application, the width of the oil outlet is greater than the width of the end of the flow regulating port away from the oil inlet.

[0014] In one embodiment of the present application, the nozzle valve body includes a valve body and a plug, the valve body has a hollow cavity penetrating the valve body, the plug cooperates with the valve body to seal one end opening of the hollow cavity, the other end opening of the hollow cavity is the oil inlet, and the side wall of the valve body is provided with the oil outlet.

[0015] In one embodiment of the present application, a compression spring is arranged between an end of the plunger body away from the oil inlet and the nozzle valve body.

[0016] In one embodiment of the present application, the flow regulating port includes an opening section, a rapid increase section, a stable section and a continuously increasing section in sequence starting from the end away from the oil inlet, and the widths of the opening section, the rapid increase section, the stable section and the continuously increasing section increase in sequence, and the width increase rate of the rapidly increase section and the continuously increasing section is greater than the width increase rate of the opening section and the stable section.

[0017] In one embodiment of the present application, a mounting plate is further included, and the mounting plate is arranged on the nozzle valve body.

[0018] An engine comprises a piston cooling nozzle as described in any one of the above items.

[0019] It can be seen from the above technical scheme that the present invention discloses a piston cooling nozzle, which includes a nozzle valve body and a plunger body, wherein the nozzle valve body is provided with an oil inlet and an oil outlet, the oil inlet and the oil outlet are respectively connected to the valve cavity of the nozzle valve body, the plunger body is elastically arranged in the valve cavity, the plunger body is provided with an oil storage cavity connected to the oil inlet, and a flow regulating port is provided on the side wall of the plunger body opposite to the oil outlet, the flow regulating port is used to connect with the oil outlet when the plunger body moves to a first preset position in the direction away from the oil inlet relative to the nozzle valve body, and the width of the flow regulating port gradually increases from the end away from the oil inlet. It should be noted that since the output flow required for the oil outlet of the piston cooling nozzle does not change linearly with the engine speed, the change in the width of the above-mentioned flow regulating port is not uniform.

[0020] During use, as the oil pressure at the oil inlet increases, the plunger body moves away from the oil inlet under the action of the oil pressure. When the flow regulating port on the plunger body partially coincides with the oil outlet, the piston cooling nozzle begins to spray oil outward. At this time, the width of the flow regulating port is narrow, and the amount of oil sprayed by the piston cooling nozzle is small. As the oil pressure at the oil inlet increases, the plunger body continues to move away from the oil inlet, the width of the flow regulating port begins to gradually increase, and the amount of oil sprayed by the piston cooling nozzle also increases accordingly. That is, the above-mentioned piston cooling nozzle designs the shape and size of the flow regulating port so that the output flow of the piston cooling nozzle can change with the change of random oil pressure, thereby meeting the cooling needs of the piston under different working conditions. The structure is simple, does not rely on the electronic control system, and has low requirements for layout space. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 An exploded view of a piston cooling nozzle provided by an embodiment of the present invention; Figure 2 A cross-sectional view of a piston cooling nozzle provided by an embodiment of the present invention; Figure 3 A front view of a plunger body of a piston cooling nozzle provided in one embodiment of the present invention; Figure 4 A cross-sectional view of a piston cooling nozzle provided by an embodiment of the present invention when the oil pressure is relatively low; Figure 5 A schematic diagram of the relative positions of the plunger body and the oil outlet of the piston cooling nozzle provided by the embodiment of the present invention when the oil pressure is relatively low; Figure 6 A cross-sectional view of a piston cooling nozzle provided by an embodiment of the present invention when the oil pressure is relatively high; Figure 7 A schematic diagram of the relative positions of the plunger body, the oil outlet and the oil drain port of the piston cooling nozzle provided by the embodiment of the present invention when the oil pressure is relatively high; Figure 8 A front view of a plunger body of a piston cooling nozzle provided in another embodiment of the present invention.

[0023] In the figure:

[0024] 1 is the nozzle valve body; 110 is the valve body; 120 is the plug; 111 is the oil inlet; 112 is the oil outlet; 113 is the oil drain port;

[0025] 2 is the plunger body; 201 is the oil storage chamber; 202 is the flow regulating port; 2021 is the opening section; 2022 is the rapid increase section; 2023 is the stable section; 2024 is the continuous increase section;

[0026] 3 is a compression spring; 4 is a nozzle tube; 5 is a mounting plate. DETAILED DESCRIPTION

[0027] One of the cores of the present invention is to provide a piston cooling nozzle, the structural design of which makes the structure simple, requires little layout space, and can achieve output flow rate changing with random oil pressure changes.

[0028] Another core of the present invention is to provide an engine comprising the above-mentioned piston cooling nozzle.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] See also Figures 1 to 3 , Figure 1 An exploded view of a piston cooling nozzle provided by an embodiment of the present invention, Figure 2 A cross-sectional view of a piston cooling nozzle provided by an embodiment of the present invention, Figure 3 A front view of a plunger body of a piston cooling nozzle provided in an embodiment of the present invention.

[0031] An embodiment of the present invention discloses a piston cooling nozzle, which includes a nozzle valve body 1 and a plunger body 2 .

[0032] The nozzle valve body 1 is provided with an oil inlet 111 and an oil outlet 112, the oil inlet 111 and the oil outlet 112 are respectively connected to the valve cavity of the nozzle valve body 1, the oil inlet 111 is used to connect the valve cavity of the nozzle valve body 1 with the main oil channel, the oil outlet 112 is used to spray oil to the piston head, the shape of the oil outlet 112 includes but is not limited to a circle, an ellipse, a polygon, the plunger body 2 is elastically arranged in the valve cavity, the plunger body 2 is provided with an oil storage cavity 201 connected to the oil inlet 111, and the plunger body 2 is connected to the oil outlet 112 A flow regulating port 202 is provided on the side wall, and the flow regulating port 202 is used to connect with the oil outlet 112 when the plunger body 2 moves to a first preset position relative to the nozzle valve body 1 in a direction away from the oil inlet 111. The width of the flow regulating port 202 gradually increases from the end away from the oil inlet 111. It should be noted that since the required output flow of the oil outlet 112 of the piston cooling nozzle does not change linearly with the engine speed, the change in the width of the above-mentioned flow regulating port 202 is not uniform.

[0033] Compared with the prior art, when the piston cooling nozzle provided in the embodiment of the present invention is used, as the oil pressure of the oil inlet 111 increases, the plunger body 2 moves in a direction away from the oil inlet 111 under the action of the oil pressure. When the flow regulating port 202 on the plunger body 2 partially overlaps with the oil outlet 112, the piston cooling nozzle starts to spray oil outward. When the oil pressure is small, the movement of the plunger body 2 is small, so the narrower part of the flow regulating port 202 on the plunger body 2 overlaps with the oil outlet 112, and the flow cross-sectional area of ​​the narrower part of the flow regulating port 202 is smaller than the flow cross-sectional area of ​​the oil outlet 112. Figure 4 and Figure 5 As shown, at this time, the amount of oil sprayed by the piston cooling nozzle is small. As the oil pressure at the oil inlet 111 increases, the plunger body 2 continues to move away from the oil inlet 111, and the width of the flow regulating port 202 begins to gradually increase. The flow cross-sectional area of ​​the relative position of the flow regulating port 202 and the oil outlet 112 gradually approaches the flow cross-sectional area of ​​the oil outlet 112, and the amount of oil sprayed by the piston cooling nozzle also increases accordingly. When the oil pressure at the oil inlet 111 continues to increase, the widest part of the upper end of the flow regulating port 202 is opposite to the oil outlet 112. At this time, the flow cross-sectional area of ​​the relative position of the flow regulating port 202 and the oil outlet 112 is basically equivalent to the flow cross-sectional area of ​​the oil outlet 112, and the oil output reaches the maximum, as shown in FIG. Figure 6 and Figure 7 As shown, it can be seen that the above-mentioned piston cooling nozzle can change the output flow of the piston cooling nozzle according to the change of the oil pressure by designing the shape and size of the flow regulating port 202, thereby meeting the cooling requirements of the piston under different working conditions. It has a simple structure and does not rely on the electronic control system, and has low requirements for the layout space.

[0034] In one embodiment of the present application, Figure 1 and Figure 2 As shown, the nozzle valve body 1 is provided with an oil drain port 113 connected to the valve cavity of the nozzle valve body 1, and the oil drain port 113 is located on the side of the oil outlet 112 away from the oil inlet 111. The oil drain port 113 is used to communicate with the flow regulating port 202 when the plunger body 2 moves to a second preset position relative to the nozzle valve body 1 in a direction away from the oil inlet 111. When the pressure in the main oil channel is too large, the plunger body 2 moves to the second preset position relative to the nozzle valve body 1 in a direction away from the oil inlet 111. At this time, the flow regulating port 202 is simultaneously connected to the oil outlet 112 and the oil drain port 113, as shown in FIG. Figure 6 and Figure 7 As shown, excess oil is discharged into the oil pan through the oil drain port 113, ensuring the normal working pressure of the piston cooling nozzle. The shape and size of the oil drain port 113 can be the same as or different from the shape and size of the oil outlet 112, and one or more oil drain ports 113 can be set.

[0035] In order to ensure that the flow regulating port 202 can be accurately connected to the oil outlet 112 and the oil drain port 113, in one embodiment of the present application, a non-rotation fit structure is provided between the plunger body 2 and the nozzle valve body 1, so that the plunger body 2 can and can only slide back and forth relative to the nozzle valve body 1 along a preset direction. The non-rotation fit between the plunger body 2 and the nozzle valve body 1 can be achieved in a variety of ways. For example, a slide groove can be provided on one of the plunger body 2 and the nozzle valve body 1, and a slider can be provided on the other of the plunger body 2 and the nozzle valve body 1. The slider and the slide groove are slidably matched, or the cross-section of the plunger body 2 and the nozzle valve body 1 can be made into a non-circular cross-section, that is, the cross-section of the plunger body 2 and the nozzle valve body 1 is polygonal, elliptical or waist-shaped, etc., to avoid relative rotation between the two.

[0036] like Figure 1 and Figure 2 As shown, the piston cooling nozzle also includes a nozzle tube 4, which is connected to the oil outlet 112. The other end of the nozzle tube 4 is used to spray engine oil onto the piston head. The nozzle tube 4 can be a straight tube, a curved tube or an irregularly shaped tube according to the setting position of the piston cooling nozzle.

[0037] Preferably, the width of the oil outlet 112 is greater than the width of the end of the flow regulating port 202 away from the oil inlet 111, so as to ensure that the flow area can be adjusted with the relative movement of the oil outlet 112 and the flow regulating port 202.

[0038] like Figure 1 and Figure 2As shown, in one embodiment of the present application, to facilitate processing, manufacturing and assembly, the nozzle valve body 1 includes a valve body 110 and a plug 120. The valve body 110 has a hollow cavity penetrating the valve body 110. The plug 120 cooperates with the valve body 110 to seal one end opening of the hollow cavity to enclose the valve cavity of the nozzle valve body 1. The other end opening of the hollow cavity is an oil inlet 111. The side wall of the valve body 110 is provided with an oil outlet 112 and an oil drain 113.

[0039] like Figure 1 and Figure 2 As shown, the plunger body 2 is elastically arranged in the nozzle valve body 1 by means of a compression spring 3, that is, a compression spring 3 is arranged between the end of the plunger body 2 away from the oil inlet 111 and the nozzle valve body 1. The compression spring 3 is not the only option for elastically arranging the plunger body 2 in the nozzle valve body 1. Other elastic devices can also be used to realize the elastic arrangement of the plunger body 2 in the nozzle valve body 1, such as a leaf spring, a torsion spring, etc.

[0040] like Figure 3 As shown, in a specific embodiment of the present application, the flow regulating port 202 is generally V-shaped with the tip facing away from the oil inlet 111. The flow regulating port 202 includes an opening section 2021, a rapid increase section 2022, a stable section 2023 and a continuous increase section 2024 in sequence from the end away from the oil inlet 111. The widths of the opening section 2021, the rapid increase section 2022, the stable section 2023 and the continuous increase section 2024 increase in sequence. Figure 3 In the embodiment shown, the width increase rate of the rapid increase section 2022 and the continuous increase section 2024 is greater than the width increase rate of the opening section 2021 and the stable section 2023. Of course, in other embodiments, the flow regulating port 202 can also be a structure with a uniform width increase rate, that is, the side walls of the flow regulating port 202 are smooth inclined surfaces, such as Figure 8 shown.

[0041] like Figure 1 and Figure 2 As shown, the piston cooling nozzle further comprises a mounting plate 5, which is arranged on the nozzle valve body 1, and a mounting hole is arranged on the mounting plate 5 for mounting the piston cooling nozzle on the engine.

[0042] An embodiment of the present application also provides an engine, which includes the piston cooling nozzle as described in the above embodiment. Since the engine adopts the piston cooling nozzle in the above embodiment, please refer to the above embodiment for the technical effect of the engine.

[0043] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0044] The principles and implementation methods of the present invention are described in this article using specific examples. The description of the above embodiments is only used to help understand the core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

Claims

1. A piston cooling nozzle, characterized in that: include: A nozzle valve body, wherein the nozzle valve body is provided with an oil inlet and an oil outlet, and the oil inlet and the oil outlet are respectively connected to the valve cavity of the nozzle valve body; A plunger body, wherein the plunger body is elastically arranged in the valve cavity, the plunger body is provided with an oil storage cavity connected with the oil inlet, and a flow regulating port is provided on the side wall of the plunger body opposite to the oil outlet, the flow regulating port is used to communicate with the oil outlet when the plunger body moves to a first preset position in a direction away from the oil inlet relative to the nozzle valve body, and the width of the flow regulating port gradually increases from the end away from the oil inlet.

2. The piston cooling nozzle according to claim 1, characterized in that The nozzle valve body is provided with an oil drain port connected to the valve cavity of the nozzle valve body, and the oil drain port is located on a side of the oil outlet away from the oil inlet. The oil drain port is used to communicate with the flow regulating port when the plunger body moves to a second preset position relative to the nozzle valve body in a direction away from the oil inlet.

3. The piston cooling nozzle according to claim 1, characterized in that: A rotation-stopping matching structure is arranged between the plunger body and the nozzle valve body, so that the plunger body can and can only slide back and forth relative to the nozzle valve body along a preset direction.

4. The piston cooling nozzle according to claim 1, characterized in that It also includes a nozzle pipe, which is connected to the oil outlet.

5. The piston cooling nozzle according to claim 1, characterized in that: The width of the oil outlet is greater than the width of the end of the flow regulating port away from the oil inlet.

6. The piston cooling nozzle according to any one of claims 1 to 5, characterized in that: The nozzle valve body includes a valve body and a plug, the valve body has a hollow cavity penetrating the valve body, the plug cooperates with the valve body to seal one end opening of the hollow cavity, the other end opening of the hollow cavity is the oil inlet, and the side wall of the valve body is provided with the oil outlet.

7. The piston cooling nozzle according to any one of claims 1 to 5, characterized in that: A compression spring is arranged between one end of the plunger body away from the oil inlet and the nozzle valve body.

8. The piston cooling nozzle according to any one of claims 1 to 5, characterized in that: The flow regulating port includes an opening section, a rapid increase section, a stable section and a continuously increasing section in sequence starting from the end away from the oil inlet. The widths of the opening section, the rapid increase section, the stable section and the continuously increasing section increase in sequence. The width increase rates of the rapidly increase section and the continuously increasing section are greater than the width increase rates of the opening section and the stable section.

9. The piston cooling nozzle according to any one of claims 1 to 5, characterized in that: It also includes a mounting plate, which is arranged on the nozzle valve body.

10. An engine, characterized in that: Comprising a piston cooling nozzle as described in any one of claims 1-9.

Images