Oil-way engine oil retaining structure of piston engine

Abstract

The utility model discloses a piston engine oil way engine oil retaining structure, belongs to the technical field of piston engines, and solves the technical problem of poor lubrication of a kinematic pair at the moment of engine starting. An engine oil retaining mechanism is arranged at an output port of the engine oil pump and comprises a shell connected with the output port of the engine oil pump, a through hole is formed in the shell, a valve sleeve is arranged at the end, close to the engine oil pump, in the through hole, a limiting hole is formed in the end, close to the engine oil pump, of the valve sleeve, and a valve element body and a spring are arranged in the other end of the valve sleeve. The spring abuts against the valve element body to one end of the limiting hole, a locking face matched with the valve element body is arranged at one end of the limiting hole, an oil passing groove is formed in the side wall of the valve sleeve, and a connector is arranged at the other end of the through hole. When the engine oil pump works, engine oil pressure overcomes the elasticity of the spring, engine oil is supplied to the kinematic pair through the valve sleeve, when the engine oil pump stops working, the valve element body is attached to the locking face, the engine oil cannot flow back, and the engine oil pressure can be rapidly established when an engine is started next time.

Description

Technical Field

[0001] The utility model relates to the technical field of piston engines, and more specifically, to an oil retaining structure for the oil circuit of a piston engine. Background Art

[0002] Piston engines are widely used. Its principle is that the energy generated by the explosive combustion of fuel drives the piston to make a linear reciprocating motion, which is converted into a rotary motion through the crankshaft and connecting rod to output torque power. There are multiple moving pairs in a piston engine, and these moving pairs require the lubrication system of the engine to provide lubricating oil for lubrication, cooling, cleaning, noise reduction, etc.

[0003] Generally, an engine is provided with an oil pan at a low position. The oil pump sucks lubricating oil from the oil pan and delivers lubricating oil with a certain pressure and flow rate to each moving pair node. The oil pump is also near the oil pan, and the lubricating oil coming out of the oil pump needs to be transported through an oil pipe and can be transported to the lubrication node after being filtered and cooled. Therefore, from the oil pump to the positions of each moving pair, some positions are relatively far. Especially for some engines, the filtering or cooling system can only be arranged at a high position, which further increases the length of the oil pipe from the oil pump to the filter or cooler. Moreover, due to the height difference, when the engine is not working, the lubricating oil in the oil pipe will slowly flow back. When starting the engine next time, the oil pipe needs to be filled first to build pressure, which delays the lubrication of the moving pairs, resulting in poor lubrication of the moving pairs at the moment of engine startup and affecting the reliability of the moving pairs. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is in view of the above deficiencies of the prior art. The purpose of the utility model is to provide an oil retaining structure for the oil circuit of a piston engine, which can quickly build oil pressure when starting the engine next time.

[0005] The technical solution of the utility model is: an oil retaining structure for the oil circuit of a piston engine, including an oil pump, an oil retaining mechanism is arranged at the output port of the oil pump. The oil retaining mechanism includes a housing connecting to the output port of the oil pump. A through hole is arranged in the housing. A valve sleeve is arranged at one end of the through hole close to the oil pump. A limiting hole is arranged at one end of the valve sleeve close to the oil pump, and a valve core body and a spring are arranged at the other end. The spring presses the valve core body against one end of the limiting hole. A locking surface cooperating with the valve core body is arranged at one end of the limiting hole. An oil passing groove is arranged on the side wall of the valve sleeve. A connecting head is arranged at the other end of the through hole.

[0006] As a further improvement, the through hole includes a valve sleeve installation hole for installing the valve sleeve, a joint installation hole for installing the connecting head, and a tapered hole connecting the valve sleeve installation hole and the joint installation hole.

[0007] Further, the joint mounting hole and the connector are connected by threads.

[0008] Further, a step is provided in the joint mounting hole, and a first sealing ring is provided between the end of the connector and the step.

[0009] Further, locking bolts for locking the housing to the oil pump are respectively provided on both sides of the housing.

[0010] Further, a second sealing ring is provided between the housing and the oil pump.

[0011] Further, an interference part is provided on the outer wall of one end of the valve sleeve close to the oil pump. The diameter of the valve sleeve is smaller than that of the interference part, and an interference fit is provided between the interference part and the valve sleeve mounting hole.

[0012] Further, the valve core body is of a spherical structure.

[0013] Further, an adjusting plug for pressing against the spring is provided inside one end of the valve sleeve far from the oil pump.

[0014] Further, the number of the oil passing grooves is 4, and the 4 oil passing grooves are uniformly arranged on the side wall of the valve sleeve. The locking surface is an inclined surface or an arc surface.

[0015] Advantageous Effects

[0016] Compared with the prior art, the present utility model has the following advantages:

[0017] When the oil pump of the present utility model is working, the oil pressure overcomes the spring force, the valve core body is separated from the locking surface, and the oil passes through the valve sleeve to supply oil to the moving pair. When the oil pump stops working, under the action of the spring force, the valve core body is in contact with the locking surface, and the oil cannot flow back, so as to keep the oil in the oil pipe. When the engine is started next time, the oil pressure can be quickly established. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a partially enlarged schematic structural diagram of the present utility model.

[0020] Wherein: 1 - oil pump, 2 - oil holding mechanism, 3 - housing, 4 - through hole, 5 - valve sleeve, 6 - limiting hole, 7 - valve core body, 8 - spring, 9 - locking surface, 10 - oil passing groove, 11 - connector, 12 - valve sleeve mounting hole, 13 - joint mounting hole, 14 - tapered hole, 15 - first sealing ring, 16 - locking bolt, 17 - second sealing ring, 18 - interference part, 19 - adjusting plug. Detailed Embodiments

[0021] The following further describes the present utility model with specific embodiments in the accompanying drawings.

[0022] Refer to Figures 1 to 2 , an oil retention structure for the oil circuit of a piston engine, including an oil pump 1, and an oil retention mechanism 2 is provided at the output port of the oil pump 1. The oil retention mechanism 2 includes a housing 3 connected to the output port of the oil pump 1. A through hole 4 is provided in the housing 3. At one end of the through hole 4 close to the oil pump 1, a valve sleeve 5 is provided. A limit hole 6 is provided at one end of the valve sleeve 5 close to the oil pump 1, and a valve core body 7 and a spring 8 are provided at the other end. The spring 8 presses the valve core body 7 against one end of the limit hole 6. A locking surface 9 that cooperates with the valve core body 7 is provided at one end of the limit hole 6. An oil passing groove 10 is provided on the side wall of the valve sleeve 5 for oil to flow through. A connector 11 is provided at the other end of the through hole 4, and the connector 11 is used to connect an oil pipe.

[0023] When the oil pump 1 is working, the oil pressure overcomes the elastic force of the spring 8, the valve core body 7 is disengaged from the locking surface 9, and the oil supplies oil to the moving pairs through the valve sleeve 5. When the oil pump 1 stops working, under the action of the elastic force of the spring 8, the valve core body 7 fits with the locking surface 9, and the oil cannot flow back, so as to realize the retention of the oil in the oil pipe. When the engine is started next time, the oil pressure can be quickly established.

[0024] In this embodiment, the through hole 4 includes a valve sleeve installation hole 12 for installing the valve sleeve 5, a connector installation hole 13 for installing the connector 11, and a tapered hole 14 connecting the valve sleeve installation hole 12 and the connector installation hole 13. The connection between the connector installation hole 13 and the connector 11 is a threaded connection. A step is provided in the connector installation hole 13, and a first sealing ring 15 is provided between the end of the connector 11 and the step, which can improve the sealing performance between the connector 11 and the connector installation hole 13.

[0025] Locking bolts 16 for locking it to the oil pump 1 are respectively provided on both sides of the housing 3, and a second sealing ring 17 is provided between the housing 3 and the oil pump 1, which can improve the sealing performance between the housing 3 and the oil pump 1.

[0026] An interference part 18 is provided on the outer wall of one end of the valve sleeve 5 close to the oil pump 1. The diameter of the valve sleeve 5 is smaller than the diameter of the interference part 18, and the interference part 18 and the valve sleeve installation hole 12 are in an interference fit.

[0027] In this embodiment, the valve core body 7 is a spherical structure.

[0028] Of course, in other embodiments, the valve core body 7 can also be a conical structure.

[0029] An adjusting plug 19 for pressing the spring 8 is provided inside the valve sleeve 5 at the end away from the oil pump 1. Rotating the adjusting plug 19 can adjust the pressing force of the spring 8.

[0030] In this embodiment, the number of the oil passing grooves 10 is 4, and the 4 oil passing grooves 10 are evenly arranged on the side wall of the valve sleeve 5, and the locking surface 9 is an inclined surface or an arc surface.

[0031] The above are only the preferred embodiments of the present invention. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, and these will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. A piston engine oil circuit oil retaining structure, characterized in that: The invention comprises an oil pump (1), wherein the output port of the oil pump (1) is provided with an oil retaining mechanism (2), wherein the oil retaining mechanism (2) comprises a housing (3) connected to the output port of the oil pump (1), wherein a through hole (4) is provided in the housing (3), wherein a valve sleeve (5) is provided at one end of the through hole (4) close to the oil pump (1), wherein a limiting hole (6) is provided in one end of the valve sleeve (5) close to the oil pump (1), and a valve core body (7) and a spring (8) are provided in the other end, wherein the spring (8) presses the valve core body (7) against one end of the limiting hole (6), wherein one end of the limiting hole (6) is provided with a locking surface (9) cooperating with the valve core body (7), wherein a side wall of the valve sleeve (5) is provided with an oil groove (10), and wherein a connecting head (11) is provided at the other end of the through hole (4).

2. The oil retaining structure of a piston engine oil circuit according to claim 1, characterized in that: The through hole (4) comprises a valve sleeve mounting hole (12) for mounting the valve sleeve (5), a joint mounting hole (13) for mounting the connector (11), and a tapered hole (14) communicating with the valve sleeve mounting hole (12) and the joint mounting hole (13).

3. The oil retaining structure of a piston engine oil circuit according to claim 2, characterized in that: The joint installation hole (13) and the connecting head (11) are threadedly connected.

4. The oil retaining structure of a piston engine oil circuit according to claim 3, characterized in that: A step is provided in the joint installation hole (13), and a first sealing ring (15) is provided between the end of the connector (11) and the step.

5. The oil retaining structure of a piston engine oil circuit according to claim 1, characterized in that: Locking bolts (16) for locking the housing (3) to the oil pump (1) are respectively provided on both sides of the housing (3).

6. The oil retaining structure of a piston engine oil circuit according to claim 1, characterized in that: A second sealing ring (17) is provided between the housing (3) and the oil pump (1).

7. The oil retaining structure of a piston engine oil circuit according to claim 2, characterized in that: An interference portion (18) is provided on the outer wall of one end of the valve sleeve (5) close to the oil pump (1); the diameter of the valve sleeve (5) is smaller than the diameter of the interference portion (18); and an interference fit is formed between the interference portion (18) and the valve sleeve mounting hole (12).

8. The oil retaining structure of a piston engine oil circuit according to claim 1, characterized in that: The valve core body (7) is a spherical structure.

9. The oil retaining structure of a piston engine oil circuit according to claim 1, characterized in that: An adjusting screw plug (19) for tightening the spring (8) is provided in one end of the valve sleeve (5) away from the oil pump (1).

10. The oil retaining structure of a piston engine oil circuit according to claim 1, characterized in that: The number of the oil passage grooves (10) is four, and the four oil passage grooves (10) are evenly arranged on the side wall of the valve sleeve (5), and the locking surface (9) is an inclined surface or an arc surface.

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