Forced lubrication spray head special for piston type engine cylinder sleeve

Abstract

The invention discloses a forced lubrication spray head special for a piston type engine cylinder sleeve, and relates to the technical field of lubrication spray heads. A movable plunger supporting seat is installed in a shell, a movable plunger is movably installed in the plunger supporting seat, one end of the movable plunger can stretch out through a nozzle, and the movable plunger can plug or open the nozzle when moving back and forth; the elastic element is installed between the movable plunger and the plunger supporting base, lubricating oil enters the shell from the first end of the shell and then tends to provide force in the direction close to the first end of the shell for the movable plunger, and the elastic element always provides force in the direction close to the second end of the shell for the movable plunger. When the force provided by the lubricating oil is larger than that provided by the elastic element, the movable plunger moves in the direction close to the first end of the shell and opens the nozzle, and otherwise, the movable plunger moves in the direction close to the second end of the shell and closes the nozzle. The air cylinder sleeve can be forcibly lubricated, the lubrication condition of the air cylinder sleeve is improved, and the service life of the air cylinder sleeve is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lubrication spray head, in particular to a forced lubrication spray head special for piston engine cylinder liner. BACKGROUND

[0002] Engine is the power source of many machines and devices, and cylinder liner is one of the core components of engine. During engine operation, the piston continuously moves at high speed in the cylinder liner. The inner wall of the cylinder liner needs timely and sufficient supply of lubricating oil to reduce wear. If the lubricating oil cannot be supplied to the inner wall of the cylinder liner in time and in sufficient quantity, the engine will fail due to piston seizure in a very short time.

[0003] At present, the cylinder liner of engine basically adopts splash lubrication, that is, the lubrication is realized by stirring and flinging of lubricating oil in the oil pan during the rotation of the crankshaft connecting rod. However, splash lubrication has great limitations:

[0004] Firstly, splash lubrication is more suitable for engines with wet oil pan, but not suitable for engines with dry oil pan. This is because the wet oil pan not only has the function of collecting lubricating oil, but also has the function of storing lubricating oil. There is a relatively large oil storage pool on the oil pan, and the crankshaft and connecting rod can easily contact the stored lubricating oil in the oil pan during rotation. The dry oil pan only has the function of collecting lubricating oil, and the function of storing lubricating oil is given to a separately designed oil tank, so it is difficult for the crankshaft and connecting rod to contact the lubricating oil during rotation. Although wet oil pan is more common in ordinary cars, in some high-end cars, racing cars or aviation fields, in order to reduce the height and gravity center of the engine and improve the rollability of the engine and the field of view of the driver, the engine often chooses a dry oil pan. In addition, even for the wet oil pan engine, for some special structure design of the engine, such as the horizontally opposed engine, because the cylinder axis and the lubricating oil level are parallel, the splash lubrication effect will be worse than that of the in-line engine. At this time, in order to improve the lubrication of the cylinder liner, forced lubrication method needs to be adopted.

[0005] Secondly, most of the wear of the cylinder liner occurs when the engine is just started. At this time, the engine speed is low, and it is difficult for the splash lubrication method to establish sufficient lubrication. In addition, due to gravity, the lubricating oil remaining in the cylinder liner after the last operation of the engine has flowed back to the oil pan, and the lubrication of the cylinder liner is very poor.

[0006] Thirdly, the lubricating oil will also be consumed or leaked continuously during the operation of the engine. If the lubricating oil is not replenished or replaced in time, the lubricating oil level in the oil pan will be too low, which will weaken the splash lubrication effect.

[0007] Finally, the quality of the lubricating oil will also decrease rapidly due to the continuous stirring of the crankshaft connecting rod, which will affect the lubrication ability and service life of the engine. SUMMARY

[0008] The present application aims to provide a piston engine cylinder liner dedicated forced lubrication nozzle to solve the above-mentioned problems existing in the prior art, realize forced lubrication cylinder liner, improve the lubrication of the cylinder liner, and prolong the service life of the cylinder liner.

[0009] To achieve the above-mentioned purpose, the present application provides the following scheme:

[0010] The present application provides a piston engine cylinder liner dedicated forced lubrication nozzle, comprising a shell, a movable plunger, a plunger support seat and an elastic element, the first end of the shell is used for connecting the engine, the second end of the shell forms a nozzle for lubricating oil ejection, the shell is hollow inside, and the movable plunger support seat is installed in the shell, the movable plunger is movably installed in the plunger support seat, and one end of the movable plunger can extend out through the nozzle, the movable plunger can block or open the nozzle when reciprocating, the elastic element is installed between the movable plunger and the plunger support seat, after the lubricating oil enters the shell from the first end of the shell, it can act on the movable plunger and provide a force trend in the direction close to the first end of the shell, the elastic element always provides a force trend in the direction close to the second end of the shell, when the force provided by the lubricating oil is greater than the force provided by the elastic element, the movable plunger moves in the direction close to the first end of the shell and opens the nozzle, when the force provided by the lubricating oil is less than the force provided by the elastic element, the movable plunger moves in the direction close to the second end of the shell and closes the nozzle.

[0011] Preferably, the movable plunger is provided with a circle of locking bevels on the outer periphery of one end close to the nozzle, and from the direction of the second end of the shell to the first end of the shell, the locking bevels gradually extend in the direction away from the axis of the movable plunger, the locking bevels can contact or not contact the inner edge of the nozzle with the movement of the movable plunger, and the lubricating oil entering the shell can act on the locking bevels.

[0012] Preferably, the nozzle is a rounded table-shaped opening.

[0013] Preferably, the movable plunger forms a guide head at one end close to the nozzle, the guide head is in the shape of a rounded table, and the maximum outer diameter of the guide head is smaller than the minimum inner diameter of the nozzle.

[0014] Preferably, the plunger support seat is provided with a ring-shaped protrusion at one end away from the nozzle, the ring-shaped protrusion is provided with a plurality of lubricating oil channels, an oil cavity is formed between the outer wall of the plunger support seat and the inner wall of the shell, one end of the lubricating oil channels is capable of communicating with the inner cavity of the first end of the shell, the other end of the lubricating oil channels is capable of communicating with the oil cavity, and the oil cavity is capable of communicating with the nozzle.

[0015] Preferably, one end of the plunger support seat is provided with a mounting groove, the mounting groove is used for slidably connecting the movable plunger, the other end of the plunger support seat is provided with a mounting channel, the mounting channel is in internal communication with the mounting groove, one end of the movable plunger passes through the mounting channel, and the elastic element is mounted in the mounting groove and sleeved on the outer periphery of the movable plunger.

[0016] Preferably, the lower part of the movable plunger forms a movable column, the movable column is used for passing through the mounting channel, the middle part of the movable plunger is provided with a ring-shaped abutting groove, the abutting groove is located at the outer periphery of the movable column, one end of the elastic element abuts the inner bottom surface of the abutting groove, the other end of the elastic element abuts the inner bottom surface of the mounting groove, and the elastic element is always in a compressed state; and the elastic element is a spring.

[0017] Preferably, a first sealing ring is mounted between the outer periphery of the movable column and the inner wall of the mounting channel, and a second sealing ring is mounted between the outer periphery of the movable plunger and the inner wall of the plunger support seat.

[0018] Preferably, one end of the movable column is threadedly connected with a nut, the nut is located in the shell, and the nut is located below the plunger support seat.

[0019] Preferably, the inner wall of the first end of the shell is provided with an internal thread, the internal thread is used for threadedly connecting the outer wall of the plunger support seat, the outer wall of the first end of the shell is provided with an external thread, and the external thread is used for threadedly connecting the engine.

[0020] The present application has the following technical effects relative to the prior art:

[0021] The piston engine cylinder liner special forced lubrication nozzle provided by the application comprises a shell, a movable plunger, a plunger support seat and an elastic element, the first end of the shell is used for connecting an engine, so that the whole piston engine cylinder liner special forced lubrication nozzle is connected to the engine, the second end of the shell forms a nozzle for spraying lubricating oil, so that the lubricating oil is sprayed to lubricate the cylinder liner, the shell is hollow, the movable plunger support seat is installed in the shell, the movable plunger is movably installed in the plunger support seat, one end of the movable plunger can extend out through the nozzle, the movable plunger can block or open the nozzle when moving back and forth, so that the opening of the nozzle is adaptively adjusted, the elastic element is installed between the movable plunger and the plunger support seat, the lubricating oil entering the shell from the first end of the shell can act on the movable plunger and provide a force trend in the direction close to the first end of the shell, the elastic element always provides a force trend in the direction close to the second end of the shell, that is, the direction of the force of the lubricating oil acting on the movable plunger is opposite to the direction of the force of the elastic element acting on the movable plunger, when the force provided by the lubricating oil is greater than the force provided by the elastic element, the movable plunger moves in the direction close to the first end of the shell and opens the nozzle, when the force provided by the lubricating oil is smaller than the force provided by the elastic element, the movable plunger moves in the direction close to the second end of the shell and closes the nozzle, so that the opening of the nozzle is adaptively adjusted according to the pressure of the lubricating oil, the lubrication of the cylinder liner is improved, and the service life of the cylinder liner is prolonged, meanwhile, the initial opening of the nozzle can be set to ensure that the lubrication can be realized as long as there is lubricating oil in the shell when the engine is started next time. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0023] Figure 1 It is a sectional view of the piston engine cylinder liner special forced lubrication nozzle in the present application.

[0024] In the figure: 1-shell, 11-nozzle, 2-movable plunger, 21-guide head, 22-spraying inclined surface, 23-locking inclined surface, 24-supporting cylindrical surface, 3-elastic element, 4-plunger support seat, 41-lubricating oil channel, 42-mounting groove, 5-nut, 6-first sealing ring, 7-second sealing ring. DETAILED DESCRIPTION

[0025] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0026] The present application aims to provide a piston engine cylinder liner dedicated forced lubrication nozzle to solve the problems existing in the prior art, realize forced lubrication of the cylinder liner, improve the lubrication of the cylinder liner, and prolong the service life of the cylinder liner.

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0028] As shown in Figure 1 The present embodiment provides a piston engine cylinder liner dedicated forced lubrication nozzle, which comprises a shell 1, a movable plunger 2, a plunger support seat 4 and an elastic element 3. The first end of the shell 1 is used to connect the engine, so that the entire piston engine cylinder liner dedicated forced lubrication nozzle is connected to the engine. The second end of the shell 1 forms a nozzle 11 for lubricating oil ejection, which realizes the ejection of lubricating oil to lubricate the cylinder liner. The shell 1 is hollow inside, and the plunger support seat 4 is installed in the shell 1. The movable plunger 2 is movably installed in the plunger support seat 4, and one end of the movable plunger 2 can extend out through the nozzle 11. The movable plunger 2 can block or open the nozzle 11 when it moves back and forth, so as to realize self-adaptive adjustment of the opening and closing of the nozzle 11. The elastic element 3 is installed between the movable plunger 2 and the plunger support seat 4. After the lubricating oil enters the shell 1 from the first end of the shell 1, it can act on the movable plunger 2 and provide a force tendency in the direction close to the first end of the shell 1. The elastic element 3 always provides a force tendency in the direction close to the second end of the shell 1, that is, the direction of the force of the lubricating oil acting on the movable plunger 2 is opposite to the direction of the force of the elastic element 3 acting on the movable plunger 2. When the force provided by the lubricating oil is greater than the force provided by the elastic element 3, the movable plunger 2 moves in the direction close to the first end of the shell 1 and opens the nozzle 11. When the force provided by the lubricating oil is less than the force provided by the elastic element 3, the movable plunger 2 moves in the direction close to the second end of the shell 1 and closes the nozzle 11. Thus, the opening degree of the nozzle 11 is self-adaptively adjusted according to the pressure of the lubricating oil, the lubrication of the cylinder liner is improved, and the service life of the cylinder liner is prolonged. At the same time, by setting the initial opening degree of the nozzle 11, it can be ensured that the engine can be lubricated as long as there is lubricating oil in the shell 1 when the engine is started next time.

[0029] Specifically, the movable plunger 2 is provided with a ring of locking bevels 23 on the outer periphery of one end close to the spout 11, and the locking bevels 23 gradually extend away from the axis of the movable plunger 2 in the direction from the second end of the shell 1 to the first end of the shell 1, the locking bevels 23 can contact or not contact the inner edge of the spout 11 with the movement of the movable plunger 2, and can act on the locking bevels 23 when the lubricating oil enters the shell 1, and then the opening of the spout 11 can be adjusted by the cooperation of the locking bevels 23 and the inner edge of the spout 11.

[0030] The spout 11 is a rounded table-shaped opening, which can guide the lubricating oil and ensure the smooth spraying of the lubricating oil.

[0031] The movable plunger 2 forms a guide head 21 at one end close to the spout 11, the guide head 21 is a rounded table shape, and the maximum outer diameter of the guide head 21 is smaller than the minimum inner diameter of the spout 11, such a shape design makes the lubricating oil sprayed out of the spout 11 can be guided by the lower end bevel of the guide head 21, and then different umbrella angles of 360° spraying can be realized by adjusting the angle of the lower end of the guide head 21, and the skilled in the art can also cancel the setting of the lower end bevel of the guide head 21 according to actual needs to realize linear spraying. The lower end surface of the guide head 21 forms a spraying bevel 22.

[0032] The plunger support seat 4 is provided with a ring-shaped protrusion at one end away from the spout 11, a plurality of lubricating oil channels 41 are arranged on the ring-shaped protrusion, the number of lubricating oil channels 41 can be selected by the skilled in the art according to actual needs, and the number of lubricating oil channels 41 is too small or the aperture is too small to increase the resistance and affect the flow, and the number of lubricating oil channels 41 is too large or the aperture is too large to affect the main oil passage pressure of the engine, an oil cavity is formed between the outer wall of the plunger support seat 4 and the inner wall of the shell 1, one end of the lubricating oil channel 41 can communicate with the inner cavity of the first end of the shell 1, the other end of the lubricating oil channel 41 can communicate with the oil cavity, and the oil cavity can communicate with the spout 11, so as to realize the lubricating oil in the main oil passage of the first end of the shell 1 into the oil cavity, and then the lubricating oil in the oil cavity is sprayed out of the spout 11.

[0033] One end of the plunger support seat 4 is provided with a mounting groove 42, the mounting groove 42 is used for slidingly connecting the movable plunger 2, the other end of the plunger support seat 4 is provided with a mounting channel, the mounting channel is in communication with the inside of the mounting groove 42, one end of the movable plunger 2 passes through the mounting channel, and the elastic element 3 is installed in the mounting groove 42 and is sleeved on the outer periphery of the movable plunger 2.

[0034] The lower part of the movable plunger 2 forms a movable column for passing through the mounting channel. The middle part of the movable plunger 2 is provided with a circle of abutting grooves on the outer periphery of the movable column, and one end of the elastic element 3 abuts against the inner bottom surface of the abutting grooves, and the other end of the elastic element 3 abuts against the inner bottom surface of the mounting groove 42, and the elastic element 3 is always in a compressed state. The height of the supporting column surface 24 on the movable plunger 2 should be reasonably designed to avoid affecting the stroke of the movable plunger 2 to cause the opening to be too small when it is too long, or to cause the spray inclined surface 22 to be too close to the shell 1 to affect the opening of the nozzle 11 when it is too short, and the spring is excessively compressed. The elastic element 3 is a spring, and springs with different elastic coefficients can be selected as needed. When the overall lubricating oil pressure of the engine is large or the cylinder liner needs less lubrication, a spring with a larger elastic coefficient can be selected to make the opening of the nozzle 11 smaller under the same lubricating oil pressure, and vice versa. The outer peripheral end surface of the abutting grooves forms a supporting column surface 24, which can limit the lower limit position of the movable plunger 2 to avoid excessive compression of the spring and too small distance between the shell 1 and the spray inclined surface 22 to affect the opening of the nozzle 11.

[0035] A first sealing ring 6 is mounted between the outer periphery of the movable column and the inner wall of the mounting channel to prevent lubricating oil from entering the inside of the mounting groove 42 of the plunger support seat 4 from bottom to top. A second sealing ring 7 is mounted between the outer periphery of the movable plunger 2 and the inner wall of the plunger support seat 4 to prevent lubricating oil from entering the inside of the mounting groove 42 of the plunger support seat 4 from top to bottom. Through the setting of the two sealing rings, it is ensured that the lubricating oil cannot enter the cavity of the elastic element 3 when the movable plunger 2 moves within the two stroke limits, i.e. the mounting groove 42, to avoid forming a liquid lock (i.e. because of the incompressible nature of the liquid, if the mounting groove 42 is full of lubricating oil, the movable plunger 2 will not be able to move), and at the same time, a ventilation hole can be designed on the movable plunger 2 to further avoid liquid lock.

[0036] One end of the movable plunger is screwed with a nut 5, which is located in the shell 1 and below the plunger support seat 4, and the up-limit position of the movable plunger 2 is limited by the nut 5 to control the minimum opening of the nozzle 11. In the actual design process, the nut 5 can be cancelled by those skilled in the art, when the nut 5 is cancelled, the movable plunger 2 will be tightly attached to the inner wall of the shell 1 under the action of the spring force during the engine stop running, and the nozzle 11 is closed to ensure the rapid establishment of the lubricating oil pressure in the engine oil passage. At the same time, when the nut 5 is cancelled, the length of the slender rod on the movable plunger 2 for installing the nut 5 can be shortened, the first sealing ring 6 can be cancelled, and the installation channel of the slender rod on the plunger support seat 4 can be cancelled to reduce the sealing interface. When the nut 5 is installed, the movable plunger 2 and the shell 1 can be separated to different openings according to the different screwing depth of the nut 5 to set the initial opening of the nozzle 11, and to ensure that the engine can be sprayed as long as there is lubricating oil in the main oil passage when the engine is started next time.

[0037] The inner wall of the first end of the shell 1 is provided with an internal thread for screwing the outer wall of the plunger support seat 4, and the outer wall of the first end of the shell 1 is provided with an external thread for screwing the engine. In order to quickly form oil pressure in the nozzle 11 and spray oil to the cylinder liner when the engine is started, the main oil passage of the engine is preferentially connected.

[0038] The specific self-adapting adjustment principle of the embodiment is: the pressure difference of the lubricating oil on the upper and lower surfaces of the movable plunger 2 (the upper surface is the locking inclined surface 23, and the lower surface is the end surface of the movable plunger 2 on the side close to the engine) is relied on to balance the spring elastic force, thereby controlling the up and down movement of the movable plunger 2 and realizing the adjustment of the opening degree of the nozzle 11. Since the oil cavity is communicated with the main oil passage of the engine through the lubricating oil passage 41, and the pressure drop caused by the lubricating oil passage 41 is ignored, the lubricating oil pressure in the oil cavity and the main oil passage of the engine is the same, but the equivalent cross-sectional areas of the upper and lower parts of the movable plunger 2 are different. According to the formula F=P*S (force is equal to pressure multiplied by force area), the downward pressure generated by the upper half of the movable plunger 2 (i.e. at the locking inclined surface 23) is large, and the upward pressure generated by the lower half of the movable plunger 2 (i.e. the end surface of the movable plunger 2 on the side close to the engine) is small. The resultant force is downward, and the size of the resultant force is equal to the product of the difference between the equivalent cross-sectional areas of the upper and lower parts of the movable plunger 2 and the lubricating oil pressure. The cross-sectional area difference is fixed, so when the lubricating oil pressure is small, the resultant force is also small, and when the lubricating oil pressure is large, the resultant force is also large. When the resultant force is smaller than the spring elastic force, the nozzle 11 at the top end of the shell 1 remains closed, and when the resultant force is larger than the spring elastic force, the movable plunger 2 starts to move downward, thereby opening the nozzle 11, and the greater the resultant force, the greater the displacement of the movable plunger 2. After the nozzle 11 is opened, the lubricating oil is sprayed out of the nozzle 11, and the spraying inclined surface 22 controls the position where the lubricating oil is sprayed to the cylinder liner. When the lubricating oil pressure decreases, the movable plunger 2 gradually moves upward under the action of the spring, and the opening degree of the nozzle 11 gradually decreases until it is completely closed.

[0039] Through the above design, the embodiment can provide forced and reliable lubrication for the cylinder liner, avoid insufficient lubrication when starting or at low speed, and is especially suitable for engines with dry oil sumps. In addition, the embodiment can automatically adapt to the working condition requirements of the engine. When the engine speed is low, the movement speed of the piston in the cylinder liner is small, and the cylinder liner requires low lubrication. At this time, the main oil passage of the engine also has low lubricating oil pressure due to the low engine speed, and the opening degree of the nozzle 11 is correspondingly reduced, and the amount of lubricating oil sprayed to the cylinder liner is small. Conversely, when the cylinder liner requires high lubrication, the amount of lubricating oil sprayed to the cylinder liner is large. Furthermore, by selecting springs with different elastic coefficients, different opening degrees of the nozzle 11 can be realized under the same lubricating oil pressure, and the initial opening degree of the nozzle 11 can be set by the nut 5 (from the closed adjustment to the maximum opening degree). When the initial opening degree is not zero, lubrication can be sprayed as long as there is lubricating oil in the main oil passage. On the other hand, the embodiment can avoid the agitation of splash lubrication to the lubricating oil, avoid the agitation leading to the degradation of the quality of the lubricating oil, prolong the service life of the lubricating oil, and can also be used for forced lubrication of other parts of the engine.

[0040] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A forced lubrication nozzle for piston engine cylinder liners, characterized by: The cam is mounted on a support frame and has a first end which is adapted to move the cam forwardly and downwardly from the support frame to form a rotational movement of the cam. The cam is mounted on a support frame and has a first end which is adapted to move the cam forwardly and downwardly from the support frame to form a rotational movement of the cam.

2. The forced lubrication nozzle for piston engine cylinder liners according to claim 1, characterized in that: The movable plunger is provided with a locking inclined surface on the outer circumference of one end close to the nozzle, and the locking inclined surface gradually extends in the direction away from the axis of the movable plunger from the second end of the shell to the first end of the shell. The locking inclined surface can contact or not contact the inner edge of the nozzle as the movable plunger moves, and when lubricating oil enters the shell, it can act on the locking inclined surface.

3. The forced lubrication nozzle for piston engine cylinder liners according to claim 2, characterized in that: The nozzle is an inverted truncated cone-shaped opening.

4. The forced lubrication nozzle for piston engine cylinder liners according to claim 1, characterized in that: The movable plunger forms a guide head at one end close to the nozzle. The guide head is in the shape of an inverted truncated cone, and the maximum outer diameter of the guide head is smaller than the minimum inner diameter of the nozzle.

5. The forced lubrication nozzle for piston engine cylinder liners according to claim 1, characterized in that: The plunger support seat is provided with a circle of annular protrusions at one end away from the nozzle, and a plurality of lubricating oil channels are provided on the annular protrusions. An oil cavity is formed between the outer wall of the plunger support seat and the inner wall of the shell. One end of the lubricating oil channel can be connected to the first end inner cavity of the shell, and the other end of the lubricating oil channel can be connected to the oil cavity, and the oil cavity can be connected to the nozzle.

6. The forced lubrication nozzle for piston engine cylinder liners according to claim 1, characterized in that: One end of the plunger support seat is provided with a mounting groove, and the mounting groove is used to slide the movable plunger. The other end of the plunger support seat is provided with a mounting channel, and the mounting channel is connected to the inside of the mounting groove. One end of the movable plunger passes through the mounting channel, and the elastic element is installed in the mounting groove and sleeved on the outer circumference of the movable plunger.

7. The forced lubrication nozzle for piston engine cylinder liners according to claim 6, characterized in that: The lower part of the movable plunger forms a movable column, which is used to pass through the installation channel. A circle of abutment groove is provided in the middle part of the movable plunger. The abutment groove is located on the outer periphery of the movable column, and one end of the elastic element abuts against the inner bottom surface of the abutment groove, and the other end of the elastic element abuts against the inner bottom surface of the installation groove, and the elastic element is always in a compressed state; the elastic element is a spring.

8. The forced lubrication nozzle for piston engine cylinder liners according to claim 7, characterized in that: A first sealing ring is installed between the outer periphery of the movable column and the inner wall of the installation channel, and a second sealing ring is installed between the outer periphery of the movable plunger and the inner wall of the plunger support seat.

9. The forced lubrication nozzle for piston engine cylinder liners according to claim 7, characterized in that: One end of the movable column is threadedly connected with a nut, the nut is located in the shell, and the nut is located below the plunger support seat.

10. The forced lubrication nozzle for piston engine cylinder liners according to claim 1, characterized in that: The inner wall of the first end of the shell is provided with an internal thread, and the internal thread is used to be threadedly connected to the outer wall of the plunger support seat. The outer wall of the first end of the shell is provided with an external thread, and the external thread is used to be threadedly connected to the engine.

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