Manual low-pressure lubricating oil pressure-limiting valve

Abstract

The utility model relates to the technical field of pressure limiting valves, and discloses a manual low-pressure lubricating oil pressure limiting valve which comprises a main body mechanism, a connecting mechanism and an auxiliary mechanism. According to the manual low-pressure lubricating oil pressure-limiting valve, by installing the main body mechanism, in the using process, due to the fact that the pressure of a lubricating oil system of a diesel engine is determined by the number of revolutions of the diesel engine, the output pressure of a belt pump is low at the low number of revolutions, the system pressure acts on the bottom of the valve element, the set acting force of a pressure adjusting spring is larger than the system pressure, and the pressure-limiting valve is in a closed state; system pressure acts on the bottom of the valve element in a high revolution state, the set acting force of the pressure adjusting spring is smaller than the system pressure, the valve element is opened, the system is decompressed, excessive lubricating oil flows back to an oil tank, the opening size of the valve element is in direct proportion to the set value of the pressure adjusting spring, the set values of different diesel engines are different, and the set value of the pressure adjusting spring can be changed by the pressure adjusting screw. The manual low-pressure lubricating oil pressure-limiting valve is simple in structure, high in sensitivity, convenient to set parameters, flexible in installation form, convenient to maintain and low in cost, and the practicability of the manual low-pressure lubricating oil pressure-limiting valve is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure limiting valves, in particular to a manual low-pressure lubricating oil pressure limiting valve. Background Art

[0002] In order to ensure the stable operation of the lubricating oil system, avoid the impact damage to the engine lubricating oil parts caused by pressure fluctuations, and prevent the lubricating oil system fluctuations from affecting the normal operation of the engine, all existing steam turbines, diesel engines, gasoline engines, gas engines and other types of engines have lubricating oil pressure limiting valves in the main oil pipelines.

[0003] However, since most of the existing pressure limiting valves configured for engines are imported products, they are expensive, have a long production cycle, and are inconvenient to use. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] The utility model aims to provide a manual low-pressure lubricating oil pressure limiting valve to solve the problem in the above background technology that most of the existing pressure limiting valves configured for engines are imported products, with high costs, long production cycles and inconvenient use.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a manual low-pressure lubricating oil pressure-limiting valve, comprising a main body mechanism, a connecting mechanism and an auxiliary mechanism, wherein the connecting mechanism is located at the upper end of the main body mechanism, the auxiliary mechanism is located at the inner end of the main body mechanism, the main body mechanism comprises a valve body, a protective sleeve and a pressure regulating screw, the protective sleeve is movably mounted on the left end of the valve body, and the pressure regulating screw is fixedly mounted inside the protective sleeve;

[0008] Preferably, the main body mechanism also includes a limiting nut, a locking sleeve, a pressure regulating spring, a valve core and a valve sleeve, the limiting nut is movably mounted on the outer end of the pressure regulating screw, the locking sleeve is movably mounted on the right end of the limiting nut, and the pressure regulating spring is movably mounted on the right end of the locking sleeve. During use, since the pressure of the diesel engine lubricating oil system is determined by the speed of the diesel engine, the output pressure of the engine pump is low at low speeds, the system pressure acts on the bottom of the valve core, the setting force of the pressure regulating spring is greater than the system pressure, and the pressure limiting valve is in a closed state; under high speeds, the system pressure acts on the bottom of the valve core, the setting force of the pressure regulating spring is less than the system pressure, the valve core opens to relieve system pressure, and excess lubricating oil flows back to the tank. The opening size of the valve core is proportional to the setting value of the pressure regulating spring, and the setting values ​​of different diesel engines are different. The pressure regulating screw can change the setting value of the pressure regulating spring. It has a simple structure, high sensitivity, is easy to set parameters, has a flexible installation form, is convenient to maintain, and has a low cost.

[0009] Preferably, the valve core is movably mounted on the right end of the pressure regulating spring, and the valve sleeve is fixedly mounted on the outer side of the valve core.

[0010] Preferably, the connecting mechanism comprises an oil inlet A, a connecting thread, an oil inlet B and an oil outlet, and the oil inlet A is fixedly arranged at the upper end of the valve body.

[0011] Preferably, the connecting thread is fixedly arranged at the inner end of the oil inlet A, the oil inlet B is fixedly arranged at the rear end of the valve body, and the oil outlet is fixedly arranged at the lower end of the valve body. The user can choose to connect the oil inlet A or the oil inlet B through the connecting thread according to the specific usage situation. The unconnected port can be sealed, and the oil outlet can be connected to the diesel engine oil pan through a pipeline for use.

[0012] Preferably, the auxiliary mechanism includes a corrosion-resistant layer, a reinforcement layer A and a reinforcement layer B. The corrosion-resistant layer is fixedly arranged on the inner end of the valve body, and the corrosion-resistant layer can enhance the corrosion resistance of the valve body.

[0013] Preferably, the reinforcement layer A is fixedly arranged at the lower end of the corrosion-resistant layer, and the reinforcement layer B is fixedly arranged at the lower end of the reinforcement layer A. The strength of the valve body is further enhanced by the arrangement of the reinforcement layer A and the reinforcement layer B, and the service life can be improved.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The manual low-pressure lubricating oil pressure-limiting valve realizes, through the installation of the main mechanism, that during use, since the lubricating oil system pressure of the diesel engine is determined by the speed of the diesel engine, the output pressure of the engine pump is low at low speed, the system pressure acts on the bottom of the valve core, the setting force of the pressure regulating spring is greater than the system pressure, and the pressure-limiting valve is in a closed state; at high speed, the system pressure acts on the bottom of the valve core, the setting force of the pressure regulating spring is less than the system pressure, the valve core opens to release the system pressure, and the excess lubricating oil flows back to the oil tank. The opening size of the valve core is proportional to the setting value of the pressure regulating spring, and the setting values ​​of different diesel engines are different. The pressure regulating screw can change the setting value of the pressure regulating spring. The manual low-pressure lubricating oil pressure-limiting valve has a simple structure, high sensitivity, easy parameter setting, flexible installation form, convenient maintenance, and low cost, thereby improving the practicality of the manual low-pressure lubricating oil pressure-limiting valve;

[0016] 2. The manual low-pressure lubricating oil pressure-limiting valve, through the installation of the connecting mechanism, enables the user to choose to connect the oil inlet A or the oil inlet B through the connecting thread according to the specific usage situation, the unconnected port can be blocked, and the oil outlet can be connected to the diesel engine oil pan through a pipeline for use, thereby improving the connection effect of the manual low-pressure lubricating oil pressure-limiting valve;

[0017] 3. The manual low-pressure lubricating oil pressure limiting valve, through the installation of auxiliary mechanisms, realizes that the corrosion-resistant layer can improve the corrosion resistance of the valve body. The strength of the valve body is further enhanced by the setting of reinforcement layer A and reinforcement layer B, which can increase the service life and improve the use effect of the manual low-pressure lubricating oil pressure limiting valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0020] Figure 3 It is a partially enlarged structural diagram of the connection mechanism of the utility model;

[0021] Figure 4 This is a schematic diagram of the auxiliary mechanism structure of the utility model.

[0022] In the figure: 1. Main mechanism; 101. Valve body; 102. Protective cover; 103. Pressure regulating screw; 104. Limit nut; 105. Locking sleeve; 106. Pressure regulating spring; 107. Valve core; 108. Valve sleeve; 2. Connecting mechanism; 201. Oil inlet A; 202. Connecting thread; 203. Oil inlet B; 204. Oil outlet; 3. Auxiliary mechanism; 301. Corrosion-resistant layer; 302. Reinforcement layer A; 303. Reinforcement layer B. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 4The utility model provides a technical solution: a manual low-pressure lubricating oil pressure-limiting valve, including a main body mechanism 1, a connecting mechanism 2 and an auxiliary mechanism 3, the connecting mechanism 2 is located at the upper end of the main body mechanism 1, the auxiliary mechanism 3 is located at the inner end of the main body mechanism 1, the main body mechanism 1 includes a valve body 101, a protective sleeve 102 and a pressure-regulating screw 103, the protective sleeve 102 is movably installed at the left end of the valve body 101, the pressure-regulating screw 103 is fixedly installed inside the protective sleeve 102, the main body mechanism 1 also includes a limiting nut 104, a locking sleeve 105, a pressure-regulating spring 106, a valve core 107 and a valve sleeve 108, the limiting nut 104 is movably installed at the outer end of the pressure-regulating screw 103, the locking sleeve 105 is movably installed at the right end of the limiting nut 104, and the pressure-regulating spring 106 is movably installed at the locking sleeve 1 05, the valve core 107 is movably installed on the right end of the pressure regulating spring 106, and the valve sleeve 108 is fixedly installed on the outside of the valve core 107. During use, because the diesel engine lubricating oil system pressure is determined by the diesel engine speed, the engine pump output pressure is low at low speed, the system pressure acts on the bottom of the valve core 107, the setting force of the pressure regulating spring 106 is greater than the system pressure, and the pressure limiting valve is in a closed state; at high speed, the system pressure acts on the bottom of the valve core 107, the setting force of the pressure regulating spring 106 is less than the system pressure, the valve core 107 opens to relieve system pressure, and the excess lubricating oil flows back to the tank. The opening size of the valve core 107 is proportional to the setting value of the pressure regulating spring 106, and the setting values ​​of different diesel engines are different. The setting value of the pressure regulating spring 106 can be changed by the pressure regulating screw 103.

[0025] The connecting mechanism 2 includes an oil inlet A201, a connecting thread 202, an oil inlet B203 and an oil outlet 204. The oil inlet A201 is fixedly arranged at the upper end of the valve body 101, the connecting thread 202 is fixedly arranged at the inner end of the oil inlet A201, the oil inlet B203 is fixedly arranged at the rear end of the valve body 101, and the oil outlet 204 is fixedly arranged at the lower end of the valve body 101. The user can choose to connect the oil inlet A201 or the oil inlet B203 through the connecting thread 202 according to the specific usage situation. The unconnected port can be sealed, and the oil outlet 204 can be connected to the diesel engine oil pan through a pipeline for use.

[0026] The auxiliary mechanism 3 includes a corrosion-resistant layer 301, a reinforcement layer A302 and a reinforcement layer B303. The corrosion-resistant layer 301 is fixedly arranged at the inner end of the valve body 101, the reinforcement layer A302 is fixedly arranged at the lower end of the corrosion-resistant layer 301, and the reinforcement layer B303 is fixedly arranged at the lower end of the reinforcement layer A302. The corrosion-resistant layer 301 can improve the corrosion resistance of the valve body 101. The strength of the valve body 101 is further enhanced by the arrangement of the reinforcement layer A302 and the reinforcement layer B303, thereby improving the service life.

[0027] Working principle: Users can choose to connect the oil inlet A201 or the oil inlet B203 through the connecting thread 202 according to the specific usage. The unconnected port can be blocked. The oil outlet 204 can be connected to the diesel engine oil pan through a pipeline for use. During use, since the pressure of the diesel engine lubricating oil system is determined by the diesel engine speed, the output pressure of the engine pump is low at low speeds, the system pressure acts on the bottom of the valve core 107, and the setting force of the pressure regulating spring 106 is greater than the system pressure. The pressure limiting valve is in a closed state. At high speeds, the system pressure The force acts on the bottom of the valve core 107, and the setting force of the pressure-regulating spring 106 is less than the system pressure. The valve core 107 opens to relieve the system pressure, and the excess lubricating oil flows back to the tank. The opening size of the valve core 107 is proportional to the setting value of the pressure-regulating spring 106. The setting values ​​of different diesel engines are different. The setting value of the pressure-regulating spring 106 can be changed by the pressure-regulating screw 103. The corrosion-resistant layer 301 can improve the corrosion resistance of the valve body 101. The strength of the valve body 101 is further enhanced by the setting of the reinforcement layer A302 and the reinforcement layer B303, thereby improving the service life.

[0028] Finally, it should be noted that the above content is only used to illustrate the technical solution of the utility model, rather than to limit the protection scope of the utility model. Simple modifications or equivalent substitutions of the technical solution of the utility model by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the utility model.

Claims

1. A manual low-pressure lubricating oil pressure limiting valve, comprising a main mechanism (1), a connecting mechanism (2) and an auxiliary mechanism (3), characterized in that: The connecting mechanism (2) is located at the upper end of the main mechanism (1), and the auxiliary mechanism (3) is located at the inner end of the main mechanism (1). The main mechanism (1) comprises a valve body (101), a protective sleeve (102) and a pressure regulating screw (103). The protective sleeve (102) is movably mounted on the left end of the valve body (101), and the pressure regulating screw (103) is fixedly mounted inside the protective sleeve (102); The main body mechanism (1) further comprises a limit nut (104), a locking sleeve (105), a pressure regulating spring (106), a valve core (107) and a valve sleeve (108); the limit nut (104) is movably mounted on the outer end of the pressure regulating screw rod (103); the locking sleeve (105) is movably mounted on the right end of the limit nut (104); and the pressure regulating spring (106) is movably mounted on the right end of the locking sleeve (105).

2. The manual low-pressure lubricating oil pressure limiting valve according to claim 1 is characterized in that: The valve core (107) is movably mounted on the right end of the pressure regulating spring (106), and the valve sleeve (108) is fixedly mounted on the outer side of the valve core (107).

3. The manual low-pressure lubricating oil pressure limiting valve according to claim 2 is characterized in that: The connecting mechanism (2) comprises an oil inlet A (201), a connecting thread (202), an oil inlet B (203) and an oil outlet (204); the oil inlet A (201) is fixedly arranged at the upper end of the valve body (101).

4. The manual low-pressure lubricating oil pressure limiting valve according to claim 3 is characterized in that: The connecting thread (202) is fixedly arranged at the inner end of the oil inlet A (201), the oil inlet B (203) is fixedly arranged at the rear end of the valve body (101), and the oil outlet (204) is fixedly arranged at the lower end of the valve body (101).

5. The manual low-pressure lubricating oil pressure limiting valve according to claim 4 is characterized in that: The auxiliary mechanism (3) comprises a corrosion-resistant layer (301), a reinforcement layer A (302) and a reinforcement layer B (303); the corrosion-resistant layer (301) is fixedly arranged at the inner end of the valve body (101).

6. The manual low-pressure lubricating oil pressure limiting valve according to claim 5 is characterized in that: The reinforcement layer A (302) is fixedly arranged at the lower end of the corrosion-resistant layer (301), and the reinforcement layer B (303) is fixedly arranged at the lower end of the reinforcement layer A (302).

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