A full variable rotary distribution valve for a valve train test bench

Abstract

The application discloses a full-variable rotary distribution valve for a gas distribution mechanism test bench, which comprises a valve body, a valve core installed in the valve body and an input shaft fixedly connected with the valve core; a plurality of first input pipeline connecting ports for inputting lubricating oil and a plurality of output pipeline connecting ports for outputting lubricating oil are arranged on the valve body; a valve core cavity is arranged in the valve core, and a plurality of oil outlet grooves corresponding to the output pipeline connecting ports and communicating with the valve core cavity are arranged on the outer surface of the valve core at intervals in the circumferential direction; and the valve core rotates under the driving of the input shaft to switch on and off at least one of the oil outlet grooves and the corresponding output pipeline connecting port. The application can realize accurate and flexible lubricating oil outlet proportion control and improve the universality.

Description

Technical Field

[0001] The invention relates to a distribution valve, in particular to a fully variable rotation distribution valve used for a valve train test bench. Background Art

[0002] Valve train test benches play a crucial role in modern engine development, simulating actual engine operating conditions and enabling testing and optimization of valve train performance. For example, Chinese invention patent publication number CN110426213A discloses a hydraulically loaded multifunctional valve train test bench for engines, comprising a main structure, a transmission system, a hydraulic system, a test unit, and a data acquisition system. During operation, hydraulic oil is pumped from an oil pump to lubricate the camshaft and rocker arm shafts. When the high-speed solenoid valve in the high-pressure circuit opens, the hydraulic oil quickly fills the combustion chamber, simulating the high pressure in the combustion chamber during engine-assisted braking. The high-speed solenoid valve in the control circuit opens, driving the valve train into in-cylinder braking mode. The exhaust valve opens, overcoming resistance and forcing a small amount of hydraulic oil in the cylinder to be discharged through the exhaust duct. This causes a momentary drop in cylinder pressure, simulating the high pressure in the cylinder during exhaust braking and bringing the valve train's operating environment closer to actual operating conditions. However, existing oil circuit systems and control valve structures in the field of valve train test benches suffer from numerous drawbacks. Traditional oil circuit designs are often complex, involving numerous pipes and connectors. This not only increases system cost and installation difficulty, but also makes maintenance and repair cumbersome. Furthermore, existing control valves cannot accurately meet the diverse and high-precision testing requirements of valve train test benches. Chinese Utility Model Publication No. CN2740874Y discloses a rotary circulation distribution valve specifically for automatic grease injection. The valve valve comprises a fixed valve body and a rotating valve core with an end shaft. The valve core has a cavity, and the valve body is axially segmented with grease delivery pipeline connection ports for input and output. The valve core has channels connecting the valve core cavity at locations corresponding to the delivery pipeline connection ports of each valve body segment. When the valve core rotates, each channel is connected to the delivery pipeline connection port of the corresponding valve body segment. However, existing control valves lack flexibility in controlling the flow rate and distribution time of lubricating oil under the diverse operating conditions of a hydraulically loaded engine multi-function valve train test bench. Their versatility is poor, making them difficult to adapt to various test benches. Summary of the Invention

[0003] The present invention aims to provide a fully variable rotary distribution valve for a valve train test bench, which can achieve precise and flexible control of the lubricating oil output ratio and improve versatility.

[0004] The technical solution of the present invention is: a fully variable rotary distributing valve for a valve mechanism test bench, comprising a valve body, a valve core installed in the valve body, and an input shaft fixedly connected to the valve core; the valve body is provided with a first input pipeline connection port for inputting lubricating oil and a plurality of output pipeline connection ports for outputting lubricating oil; a valve core cavity is provided in the valve core, and oil outlet grooves corresponding to the output pipeline connection ports and connected to the valve core cavity are provided on the outer surface of the valve core at circumferential intervals; the valve core rotates under the drive of the input shaft, switching at least one of the oil outlet grooves and the corresponding output pipeline connection port.

[0005] The aforementioned fully variable rotary distribution valve for the valve mechanism test bench also includes a valve body seat; a first valve cover connected to the valve body seat is provided on one side of the valve body, and the input shaft is passed through the first valve cover; the valve body is passed through the valve body seat, and the outer surface of the valve body is provided with a connecting piece connected to the valve body seat; a first active cavity is provided in the first valve cover, and the valve body and the first active cavity are slidably fitted.

[0006] In the aforementioned fully variable rotary distribution valve for the valve mechanism test bench, the connecting member is provided with a plurality of arc-shaped first sliding grooves; after the valve body rotates, screws are set in the first sliding grooves to fix the connection with the valve body seat to fix the rotation angle of the valve body.

[0007] In the aforementioned fully variable rotary distribution valve for the valve mechanism test bench, a plurality of second sliding grooves are provided on the connecting member. After the valve body slides, screws are set in the second sliding grooves to fix the valve body seat to fix the sliding position of the valve body.

[0008] In the aforementioned fully variable rotary distribution valve for the valve train test bench, one side of the oil outlet groove has an inclination angle; after the valve body rotates or slides, the inclination angle causes the relative position relationship between the output pipeline connection port and the oil outlet groove to change, thereby realizing the control of the oil outlet time and distribution ratio.

[0009] In the aforementioned fully variable rotary distribution valve for the valve mechanism test bench, the first valve cover is provided with a second valve cover which is sleeved on the input shaft. The input shaft is rotatably matched with a rotary bearing, which is arranged on the first valve cover and the second valve cover. The second valve cover is provided with a bearing cover for limiting the rotary bearing, and the bearing cover is sleeved on the input shaft.

[0010] In the aforementioned fully variable rotary distribution valve for the valve train test bench, a second lubricating oil connection port communicating with the first active chamber is provided on the side of the first valve cover.

[0011] In the aforementioned fully variable rotary distribution valve for the valve train test bench, a valve body end cover is provided at the end of the valve body, a second movable cavity is provided between the valve body end cover and the valve core, and the valve core and the second movable cavity are slidably engaged.

[0012] In the aforementioned fully variable rotary distribution valve for the valve train test bench, the valve core is provided with an annular oil groove communicating with the first input pipeline connection port, and the annular oil groove is provided with at least one oil inlet hole communicating with the valve core cavity.

[0013] In the aforementioned fully variable rotary distribution valve for the valve train test bench, the valve core is provided with oil outlet holes corresponding to the oil outlet grooves at intervals along the circumference, and the oil outlet holes communicate with the oil outlet groove and the valve core cavity.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention utilizes circumferentially spaced oil outlet grooves on the outer surface of the valve core, in conjunction with the output pipeline connection port on the valve body, to precisely control the oil outlet timing and thereby achieve precise regulation of the lubricating oil distribution ratio. Furthermore, the oil outlet grooves of the present invention have an inclination angle. By adjusting the connection between the connector, the valve body, and the valve body seat, the oil outlet distribution ratio can be flexibly adjusted to achieve different test conditions on the valve train test bench. Furthermore, the invention can adapt to valve train test benches of different types and specifications without requiring large-scale modification of the test bench, thereby reducing the development and use costs of the test equipment while improving the versatility of the distribution valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 It is a rear side view of the present invention;

[0018] Figure 3 It is a front side view of the present invention;

[0019] Figure 4 It is a structural schematic diagram of the valve core of the present invention.

[0020] The marks in the accompanying drawings are: 1. valve body; 2. valve core; 3. input shaft; 4. first input pipeline connection port; 5. output pipeline connection port; 6. valve core cavity; 7. oil outlet groove; 7a, inclination angle; 8. valve body seat; 9. first valve cover; 10. connecting piece; 10a, first slide groove; 10b, second slide groove; 11. first movable chamber; 12. second valve cover; 13. rotating bearing; 14. oil inlet hole; 15. oil outlet hole; 16. valve body end cover; 17. second movable chamber; 18. annular oil groove; 19. bearing cover; 20. second lubricating oil connection port. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0022] Embodiment: A fully variable rotary distribution valve for a valve train test bench, as shown in the attachedFigures 1-4 As shown, it includes a valve body 1, a valve core 2 installed in the valve body 1, a valve body seat 8 and an input shaft 3 fixedly connected to the valve core 2. The valve body 1 is provided with a first input pipeline connection port 4 for inputting lubricating oil and six output pipeline connection ports 5 for outputting lubricating oil. The output pipeline connection ports 5 are evenly distributed in the circumferential direction of the valve body 1. The first input pipeline connection port 4 and the output pipeline connection port 5 are tightly connected to the external lubricating oil delivery pipeline using a standard threaded connection method to prevent oil leakage. A valve core cavity 6 is provided in the valve core 2, and the valve core cavity 6 is used to store lubricating oil. As shown Figure 4 As shown, the outer surface of the valve core 2 is provided with oil outlet grooves 7 at intervals along the circumference, corresponding to the output pipeline connection port 5 and connected to the valve core cavity 6. The number of oil outlet grooves 7 is the same as the output pipeline connection port 5. The oil outlet grooves 7 are evenly spaced along the circumference of the outer surface of the valve core 2, with an interval angle of 60°, which can accurately match the position of the output pipeline connection port 5 to achieve precise oil output control. One end of the input shaft 3 is fixedly connected to the valve core 2 by a flat key, ensuring that the two move synchronously during rotation and that power transmission is stable and reliable; the other end of the input shaft 3 is connected to the drive motor, and the speed of the input shaft 3 can be precisely adjusted according to test requirements. The input shaft 3 stably transmits the rotational power of the drive motor to the valve core 2, driving the valve core 2 to rotate, thereby achieving on-off switching between the oil outlet groove 7 and the corresponding output pipeline connection port 5.

[0023] The valve core 2 is provided with an annular oil groove 18 that communicates with the first input pipeline connection port 4. The annular oil groove 18 is provided with an oil inlet hole 14 that communicates with the valve core cavity 6. The valve core 2 is also provided with oil outlet holes 15 spaced apart along the circumference, corresponding to the oil outlet groove 7. The oil outlet holes 15 connect the oil outlet groove 7 with the valve core cavity 6. The valve core 2 rotates under the drive of the input shaft 3, switching the connection between at least one oil outlet groove 7 and at least one output pipeline connection port 5. The annular oil groove 18 and oil inlet hole 14 on the valve core 2 allow the lubricating oil entering from the first input pipeline connection port 4 to flow into the valve core cavity 6, while the oil outlet hole 15 connects the oil outlet groove 7 with the valve core cavity 6, ensuring smooth outflow of the lubricating oil.

[0024] One side of the valve body 1 is equipped with a first valve cover 9 connected to the valve body seat 8. The input shaft 3 is inserted into the first valve cover 9, and a sealing ring is provided between the valve core 2 and the valve cover. The first valve cover 9 is connected to the valve body seat 8 by six bolts, which are evenly distributed around the edge of the valve cover, ensuring a secure connection. The first valve cover 9 contains a first movable chamber 11, in which the valve body 1 slides. The first movable chamber 11 provides guidance and a certain sealing function. A second lubricating oil connection port 20 is provided on the side of the first valve cover 9, communicating with the first movable chamber 11. A sealing ring is provided at the end of the valve body 1, which has a clearance fit with the first movable chamber 11. The first valve cover 9 is fitted with a second valve cover 12, which fits over the input shaft 3. The second valve cover 12 is secured to the first valve cover 9 with four screws. The input shaft 3 is rotatably engaged with a rotating bearing 13, a 6206 deep groove ball bearing. Positioned between the first and second valve covers 9 and 12, the rotating bearing 13 reduces frictional resistance during rotation of the input shaft 3, ensuring smooth and efficient rotation of the input shaft 3, reducing energy loss, and improving the reliability and durability of the distribution valve. A sealing ring and a gasket are positioned between the rotating bearing 13 and the first valve cover 9 to prevent oil leakage. The second valve cover 12 is fitted with a bearing cap 19, which secures the rotating bearing 13. The bearing cap 19 fits over the input shaft 3 and is connected to the second valve cover 12 via a snap-fit ​​mechanism. The bearing cap 19 axially secures the rotating bearing 13, preventing axial movement during rotation, ensuring proper operation and maintaining stable rotation of the input shaft 3.

[0025] The valve body 1 is inserted into the valve seat 8. A connector 10 is provided on its outer surface, connecting to the valve seat 8. The connector 10 has two arcuate first slots 10a. After the valve body 1 rotates, screws are inserted into the first slots 10a to secure it to the valve seat 8, fixing the rotation angle of the valve body 1. The connector 10 also has two second slots 10b. After the valve body 1 slides, screws are inserted into the second slots 10b to secure it to the valve seat 8, fixing the sliding position of the valve body 1. The side of the valve body 1 connected to the oil outlet groove 7 has an inclination 7a of 15°. The connector 10 is used to adjust the position or angle of the valve body 1. To change the oil distribution ratio, the screws on the connector 10 are loosened, and the valve body 1 is moved or rotated. As the valve body 1 rotates or slides, the inclination 7a changes the relative position between the output pipeline connection 5 and the oil outlet groove 7, enabling control of the oil distribution time and distribution ratio.

[0026] The end of the valve body 1 is provided with a valve body end cap 16. A second movable cavity 17 is defined between the valve body end cap 16 and the valve core 2. The valve core 2 slides in the second movable cavity 17. The function of the valve body end cap 16 is to seal the end of the valve body 1 and form the second movable cavity 17 between the valve body end cap 16 and the valve core 2, providing space for the valve core 2 to slide.

[0027] The present invention utilizes oil outlet grooves 7 spaced circumferentially on the outer surface of the valve core 2, in conjunction with the output pipeline connection port 5 on the valve body 1, to precisely control the oil outlet timing and thereby achieve precise regulation of the lubricating oil distribution ratio. Furthermore, the oil outlet grooves 7 of the present invention have an inclination angle 7a. By adjusting the connection between the connector 10, the valve body 1, and the valve body seat 8, the oil outlet distribution ratio can be flexibly adjusted to achieve different test conditions on the valve train test bench. Furthermore, the valve train test bench can be adapted to various types and specifications without requiring large-scale modification of the test bench, thereby reducing the development and use costs of the test equipment and improving the versatility of the distribution valve.

[0028] How it works

[0029] As the input shaft 3 rotates driven by the drive motor, the valve core 2 rotates synchronously. The oil outlet groove 7 on the valve core 2 periodically connects and disconnects with the output pipeline connection 5 as it rotates. When the oil outlet groove 7 is connected to the output pipeline connection 5, the lubricating oil within the valve core cavity 6 flows into the oil outlet groove 7 through the oil outlet hole 15, then flows out through the output pipeline connection 5 and into the corresponding lubrication points of the valve train test bench. The oil output can be precisely controlled by the connection period between the oil outlet groove 7 and the output pipeline connection 5.

[0030] When it is necessary to adjust the oil distribution ratio, the screws on the connecting piece 10 can be loosened to move the position of the valve body 1 in the first slide groove 10a and the second slide groove 10b according to the test requirements, thereby changing the relative position relationship between the oil outlet groove 7 and the output pipeline connecting port 5. Since one side of the oil outlet groove 7 has an inclination angle 7a, after the position of the valve body 1 is changed, the connection time and connection area between the oil outlet groove 7 and the output pipeline connecting port 5 change, thereby achieving different oil distribution ratios and meeting the diverse test requirements of the valve mechanism test bench.

[0031] In summary, the present invention can achieve accurate and flexible control of the lubricating oil output ratio, thereby improving versatility. In summary, the present invention can achieve accurate and flexible control of the lubricating oil output ratio, thereby improving versatility.

Claims

1. A fully variable rotary distribution valve for a valve train test bench, comprising a valve body (1), a valve core (2) mounted in the valve body (1), and an input shaft (3) fixedly connected to the valve core (2); characterized in that: The valve body (1) is provided with a first input pipeline connection port (4) for inputting lubricating oil and a plurality of output pipeline connection ports (5) for outputting lubricating oil; a valve core cavity (6) is provided in the valve core (2); and oil outlet grooves (7) corresponding to the output pipeline connection ports (5) and communicating with the valve core cavity (6) are provided on the outer surface of the valve core (2) at intervals in the circumferential direction; the valve core (2) rotates under the drive of the input shaft (3), switching at least one of the oil outlet grooves (7) and the corresponding output pipeline connection port (5) on and off. It also includes a valve body seat (8); a first valve cover (9) connected to the valve body seat (8) is provided on one side of the valve body (1), and the input shaft (3) is inserted into the first valve cover (9); the valve body (1) is inserted into the valve body seat (8), and a connecting piece (10) connected to the valve body seat (8) is provided on the outer surface of the valve body (1); a first movable cavity (11) is provided in the first valve cover (9), and the valve body (1) and the first movable cavity (11) are slidably matched; The connecting member (10) is provided with a plurality of arc-shaped first sliding grooves (10a); after the valve body (1) rotates, screws are provided in the first sliding grooves (10a) to be fixedly connected to the valve body seat (8) to fix the rotation angle of the valve body (1); The connecting member (10) is provided with a plurality of second sliding grooves (10b). After the valve body (1) slides, the second sliding grooves (10b) are fixedly connected to the valve body seat (8) by screws arranged in the second sliding grooves (10b) to fix the sliding position of the valve body (1); one side of the oil outlet groove (7) has an inclination angle (7a); after the valve body (1) rotates or slides, the relative position relationship between the output pipeline connection port (5) and the oil outlet groove (7) changes due to the inclination angle (7a), thereby realizing the control of the oil outlet time and distribution ratio.

2. The fully variable rotary distribution valve for a valve train test bench according to claim 1, characterized in that: The first valve cover (9) is provided with a second valve cover (12) sleeved on the input shaft (3); the input shaft (3) is rotatably matched with a rotary bearing (13); the rotary bearing (13) is arranged on the first valve cover (9) and the second valve cover (12); the second valve cover (12) is provided with a bearing cover (19) for limiting the rotary bearing (13); the bearing cover (19) is sleeved on the input shaft (3).

3. The fully variable rotary distribution valve for a valve train test bench according to claim 1, characterized in that: A second lubricating oil connection port (20) communicating with the first active chamber (11) is provided on a side portion of the first valve cover (9).

4. The fully variable rotary distribution valve for a valve train test bench according to claim 1, characterized in that: The end of the valve body (1) is provided with a valve body end cover (16), a second movable cavity (17) is provided between the valve body end cover (16) and the valve core (2), and the valve core (2) and the second movable cavity (17) are in sliding cooperation.

5. The fully variable rotary distribution valve for a valve train test bench according to claim 1, characterized in that: The valve core (2) is provided with an annular oil groove (18) communicating with the first input pipeline connection port (4), and the annular oil groove (18) is provided with at least one oil inlet hole (14) communicating with the valve core cavity (6).

6. The fully variable rotary distribution valve for a valve train test bench according to claim 1, characterized in that: The valve core (2) is provided with oil outlet holes (15) corresponding to the oil outlet groove (7) at intervals along the circumferential direction, and the oil outlet holes (15) communicate with the oil outlet groove (7) and the valve core cavity (6).

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