阅读说明：本技术 一种温控控制阀及带温控控制阀的偏心轴 (Temperature control valve and eccentric shaft with same ) 是由 唐远明 孙德山 李帆 洪继超 沈振华 王飞月 杨曾晨 王礼亮 苗宇昌 李伟 饶宇 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种温控控制阀及带温控控制阀的偏心轴,涉及发动机生产制造领域,主要用于解决转子发动机偏心轴泄油口开闭和主油道油压保持的问题。其主要结构包括：阀芯、推杆、特质石蜡、阀片弹簧和阀片。一种温控控制阀及带温控控制阀的偏心轴,结构简单,安装方便,使用可靠。(The invention discloses a temperature control valve and an eccentric shaft with the same, relates to the field of engine production and manufacturing, and is mainly used for solving the problems of opening and closing of an oil drain port of the eccentric shaft of a rotor engine and maintaining of oil pressure of a main oil gallery. Its main structure includes: valve core, push rod, special paraffin, valve block spring and valve block. A temperature control valve and an eccentric shaft with the same are provided, which are simple in structure, convenient to install and reliable in use.)

1. A temperature control valve is characterized by comprising a push rod (10) and a valve core (12); the rear end of the valve core (12) is provided with a blind hole, the push rod (10) is arranged in the blind hole and is matched with the blind hole in size, and a filler (11) which expands when heated is arranged in a blind hole plugging space; a valve plate (14) is arranged in front of the valve core (12), and a valve plate spring (13) is arranged between the valve core (12) and the valve plate (14).

2. A temperature-controlled control valve according to claim 1, characterized in that the valve plate (14) is arched in cross-section, and the plate spring (13) is at the projecting end of the valve plate (14).

3. The temperature control valve according to claim 1, wherein a guide rod extends from the front end of the valve core (12) in the direction of the valve plate (14), and the guide rod penetrates through the valve plate (14).

4. A temperature-controlled control valve according to claim 3, characterized in that the diameter of the end of the guide rod is larger than the diameter of the through hole of the valve plate (14).

5. An eccentric shaft with a temperature-controlled control valve according to claim 1, which comprises a locking screw (1) and an eccentric shaft body (9), and is characterized in that a mounting hole is formed at the connecting end of the eccentric shaft body (9) and the locking nut (1), the temperature-controlled control valve (2) is arranged in the mounting hole, a valve block (14) is arranged at the oil drainage end of the main oil duct (6) of the eccentric shaft, and the rear end of the temperature-controlled control valve (2) is abutted against the locking nut (1).

6. The eccentric shaft with a thermostatic control valve according to claim 5, characterized in that the back end of the valve core (12) is provided with a guide boss, the lock nut (1) is provided with a guide groove matching with the guide boss, the guide boss of the valve core (12) is arranged in the guide groove of the lock nut (1), and the blind hole for placing the push rod (10) is arranged on the guide boss.

7. The eccentric shaft with the temperature-controlled control valve as claimed in claim 5, characterized in that a return spring (15) is arranged between the valve core (2) and the eccentric shaft body (9), one end of the return spring (15) is abutted against the valve core (12), and the other end is abutted against the oil drainage port plane of the eccentric shaft main oil gallery (6).

8. Eccentric shaft with thermostatic control valve according to any of claims 5 to 7 characterized in that the lock nut (1) is provided with a sealing ring (16).

Technical Field

The invention belongs to the field of engine production and manufacturing, and particularly relates to a temperature control valve and an eccentric shaft with the same.

Background

In the conventional four-stroke engine, a mechanical temperature control valve, namely a thermostat, is used in a cooling water circuit, and the mechanical switch is controlled by temperature. The basic principle is that special paraffin with the volume expanding rapidly along with the temperature rise is arranged in the valve core, when the water temperature of the engine is low, the paraffin does not expand, the valve core of the thermostat does not move, and the water circulation of the engine is internal circulation at the moment; when the water temperature of the engine rises, paraffin expands to push the valve core of the thermostat to act, the internal circulation port of cooling water of the engine is closed, and the water circulation of the engine is changed into external circulation. Mechanical valves with spring control are generally used in constant-value pressure reducing valves and pressure relief valves, and different pressure relief pressures are achieved by different spring coefficients and spool cross-sectional areas.

The center of an eccentric shaft of the rotor engine is provided with a main oil passage, and part of engine oil in the main oil passage is used for lubricating and cooling a main bearing of the rotor engine and a bearing bush of a rotor bearing; and the other part of engine oil is sprayed through a small hole on the eccentric shaft to cool the triangular rotor. Because of the structural particularity of the rotary engine, the mechanical abrasion is generally higher than that of the traditional four-stroke engine, in order to reduce the abrasion and prolong the service life of the engine, the minimum abrasion point of the rotary engine is generally matched with the temperature of the rotary engine during steady-state operation, and the temperature of the engine during steady-state operation is about 90 ℃. However, it takes time for the engine to reach a steady-state operating temperature after the start of the engine, and in order to increase the lifetime, it is necessary to shorten the warm-up time of the engine, and in order to shorten this time, it is necessary to reduce the cooling of the engine and shorten the warm-up time when the engine temperature is lower than 60 ℃. For the engine oil of the main oil gallery of the eccentric shaft, the following 3 requirements need to be met: firstly, when the temperature of an engine is lower than 60 ℃, small-hole oil injection is not carried out to cool the triangular rotor; secondly, when the temperature of the engine is lower than 60 ℃, the lubrication of the bearing bush is ensured, namely a certain oil pressure needs to be maintained; and thirdly, when the temperature of the engine is higher than 60 ℃, small-hole oil injection is carried out to cool the triangular rotor, and meanwhile, the lubrication of the bearing bush is ensured.

The defects and shortcomings of the prior art are as follows:

1. although the valve which is the same or similar to the thermostat principle can realize the action of the temperature control valve, the valve controlled by the valve only has two actions, namely, only has two states, namely, the valve is opened or closed, when the valve is opened and is connected with an oil unloading port, the valve is equivalent to a passage, and the pressure at the oil unloading port is 0 at the moment, so that the requirement of the background technology cannot be realized only by using the mechanical temperature control valve;

2. in the mechanical valve with spring control, because the structure is purely mechanical, different pressures can be acted only through different spring coefficients and valve core section areas, a certain oil duct pressure can be kept while oil drainage is carried out, the requirement in the background technology can be met, but the requirement in the background technology cannot be met because the mechanical valve does not respond to the change of temperature.

Disclosure of Invention

The present invention is directed to a thermostatic control valve to solve the above problems.

In order to realize the purpose of the invention, the technical scheme is as follows: a temperature control valve comprises a push rod and a valve core; a blind hole is formed in the rear end of the valve core, the push rod is arranged in the blind hole and is matched with the blind hole in size, and filler which expands when heated is filled in a blind hole plugging space; a valve plate is arranged in front of the valve core, and a valve plate spring is arranged between the valve core and the valve plate.

Furthermore, the section of the valve plate is arched, and the valve plate spring abuts against the protruding end of the valve plate. The middle part of the valve plate is bulged into an arch shape.

Furthermore, the valve is characterized in that a guide rod extends from the front end of the valve core to the direction of the valve plate, penetrates through the valve plate and is used for connecting the valve plate and the valve core into a whole and facilitating installation.

Furthermore, the diameter of the end part of the guide rod is larger than that of the through hole of the valve plate, so that the valve plate is prevented from sliding off the connecting rod.

The invention also provides an eccentric shaft with the temperature control valve, which comprises a locking screw and an eccentric shaft body and is characterized in that a mounting hole is formed at the connecting end of the eccentric shaft body and the locking nut, the temperature control valve is arranged in the mounting hole, the valve block is arranged at the oil drainage end port of the main oil duct of the eccentric shaft, and the rear end of the temperature control valve props against the locking nut.

Furthermore, a guide boss is arranged at the rear end of the valve core, a guide groove matched with the guide boss is formed in the locking nut, the guide boss of the valve core is arranged in the guide groove in the locking nut, and a blind hole for placing the push rod is formed in the guide boss. The guide boss moves in the guide groove to play a role in centering and guiding, and the situation that the push rod is broken due to the fact that the position of the valve core deviates when the push rod extends out is prevented.

Furthermore, a reset spring is arranged between the valve core and the eccentric shaft body, one end of the reset spring is abutted against the valve core, and the other end of the reset spring is abutted against the oil drainage port plane of the main oil duct of the eccentric shaft. Helping to push the spool back to the initial position.

Furthermore, a sealing ring is arranged on the locking nut to prevent oil leakage.

The invention has the beneficial effects that:

firstly, the invention effectively combines a mechanical temperature control switch valve and a valve with spring control, and meets 3 requirements in the background art. When the lubrication of the rotor engine under various working conditions is ensured, the warm-up time of the rotor engine is shortened, the abrasion of the rotor engine is effectively reduced, and the service life of the rotor engine is prolonged;

the temperature control valve is switched on and off through a pure mechanical mechanism, pressure maintaining is carried out by combining a spring, other sensors and control devices are not needed, and the temperature control valve is good in usability and low in cost;

thirdly, the temperature-controlled push rod and the spring-controlled valve plate are designed on the same valve core, so that the valve core is compact in structure, high in reliability and convenient to install;

drawings

FIG. 1: the structure of the control valve is schematic;

FIG. 2: schematic diagram of eccentric shaft structure of the invention

FIG. 3: the structure schematic diagram of the closed state of the temperature control valve in the eccentric shaft is shown;

FIG. 4: the invention discloses a structural schematic diagram of a temperature control valve in an eccentric shaft in an open state.

Reference numbers and corresponding part names in the drawings:

1-locking nut, 2-temperature control valve, 3-oil drain port; 4-oil inlet, 5-fixed gear bearing bush lubricating surface, 6-eccentric shaft main oil duct 7-rotor bearing bush lubricating surface, 8-cooling oil nozzle, 9-eccentric shaft body, 10-push rod, 11-filler and 12-valve core; 13-valve plate spring, 14-valve plate, 15-return spring and 16-sealing ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, the temperature-controlled control valve provided by the invention comprises a push rod 10, filler 11, a valve core 12, a valve plate spring 13 and a valve plate 14. The rear end of the valve core 12 is provided with a blind hole, the push rod 10 is arranged in the blind hole and matched with the blind hole, a filler 11 which expands when heated is arranged in a blind hole plugging space, and the filler 11 is special paraffin. A valve plate spring 13 and a valve plate 14 are arranged on one side of the valve core 12 opposite to the blind hole, the valve plate spring 13 is arranged between the valve core 12 and the valve plate 14, one end of the valve core 12 connected with the spring extends out of a guide rod towards the direction of the valve plate 14, the guide rod penetrates through the valve plate 14, and the diameter of the end part of the connecting rod is larger than that of a through hole of the valve plate 14; one end of the valve plate 14 is protruded, and the valve plate spring 13 is abutted to the protruded end of the valve plate 14. When the temperature rises, the filler 11 is heated to expand, one end of the push rod 10 is limited, the expanded filler 11 pushes the valve core 12 to move forwards, and the position of the valve core 12 is changed, so that the communication or the closing of the controlled opening and the pipeline is realized; the valve plate 14 ensures that the pipeline blocked by the valve plate 14 can keep a certain pressure under the elastic force of the valve plate spring 13.

As shown in fig. 2 and 3, the eccentric shaft with the temperature control valve provided by the invention comprises a locking nut 1, a temperature control valve 2, an eccentric shaft body 9 and a return spring 15, wherein the locking nut 1 is fixedly connected with the eccentric shaft body 9, a mounting hole is formed in the end, connected with the locking nut 1, of the eccentric shaft body 9, the temperature control valve 2 is arranged in the mounting hole, and the temperature control valve 2 comprises a push rod 10, a filler 11, a valve core 12, a valve plate spring 13 and a valve plate 14. The rear end of the valve core 12 is provided with a guide boss, a blind hole is formed in the guide boss, the push rod 10 is arranged in the blind hole and is matched with the size of the blind hole, a filler 11 which expands when heated is arranged in a blind hole plugging space, and the filler 11 is specially-made paraffin; a valve plate spring 13 and a valve plate 14 are arranged on the front side of the valve core 12, the valve plate spring 13 is arranged between the valve core 12 and the valve plate 14, the front end of the valve core 12 extends out of a connecting rod towards the direction of the valve plate 14, the connecting rod penetrates through the valve plate 14, and the diameter of the end part of the connecting rod is larger than that of a through hole of the valve plate 14; one end of the valve plate 14 is convex, and the valve plate spring 13 is arranged at the convex end of the valve plate 14. The temperature control valve 2 is arranged between the main oil way 6 and the oil drainage port 3, the valve plate 14 is arranged on the end face of the oil drainage end of the main oil way 6, and the position of the valve core 12 is changed on the stroke of the valve core 12 of the oil drainage port 3 so as to control the communication or the closing of the main oil way and the oil drainage port; the locking nut 1 is provided with a guide groove matched with a guide boss on the valve core 12, the guide boss is arranged in the guide groove to provide guide for the valve core 12, the locking nut 1 provides limit for the push rod 10, and the locking nut 1 is provided with a sealing ring 16 to prevent oil leakage. The return spring 15 is arranged on the outer ring of the valve plate spring 13, one end of the return spring is connected with the valve core 12, and the other end of the return spring is connected with the end face of the oil discharge end of the main oil duct 6. When the engine is started, engine oil pumped out by the engine oil pump of the rotor engine supplies oil to the main oil duct 6 of the eccentric shaft through the corresponding oil duct on the shell through the oil inlet 4, and the engine oil in the main oil duct 6 is lubricated by the fixed gear bearing bush lubricating surface 5 and the rotor bearing bush lubricating surface 7 all the time. When the temperature of the engine is low, the filler 11 does not expand, the push rod 10 is in the blind hole, the valve core 12 is tightly propped against the locking nut 1 and is positioned at the far end of the oil drainage port from the main oil way, a movable valve plate 14 is separated between the main oil way 6 and the oil drainage port 3 at the moment, and the valve plate 14 is under the elastic force action of the valve plate spring 13, so that the main oil way 6 can keep an oil pressure equivalent to the elastic force of the valve plate spring 13, lubrication is provided for the fixed gear bearing bush lubricating surface 5 and the rotor bearing bush lubricating surface 7, and redundant oil flows back to the oil pan from the communicated oil drainage port 3.

As shown in fig. 4, when the temperature of the engine rises, filler 11 in the gap between the push rod 10 and the blind hole is heated to expand, the push rod 10 extends out of the blind hole, one end of the push rod 10 is limited by the locking nut 1, the expanded filler 11 pushes the valve element 12, the valve element 12 moves forward, the main oil way 6 and the oil drain port 3 are separated by the valve element 12, the oil drain port 3 is completely closed, the oil pressure in the main oil way 6 rises, lubrication of the fixed gear bearing bush lubricating surface 5 and the rotor bearing bush lubricating surface 7 is ensured, and meanwhile, engine oil is sprayed out from the cooling oil nozzle 8 to cool the rotor.

When the engine is shut down, the temperature of the engine drops, the volume of the filler 11 in the gap between the push rod 10 and the blind hole is reduced, the push rod 10 returns to the blind hole, and the valve core 12 moves backwards under the combined action of the valve plate spring 13 and the return spring 15, so that the oil drain port 3 is opened.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.