Fully variable rotary distribution valve for gas distribution mechanism test bed

Abstract

The invention discloses a fully variable rotary distribution valve for a gas distribution mechanism test bed. The fully variable rotary distribution valve comprises a valve body, a valve element installed in the valve body and an input shaft fixedly connected with the valve element. The valve body is provided with a plurality of first input pipeline connectors for inputting lubricating oil and a plurality of output pipeline connectors for outputting the lubricating oil; a valve element cavity is formed in the valve element, and oil outlet grooves which correspond to the output pipeline connecting ports and are communicated with the valve element cavity are formed in the outer surface of the valve element at intervals in the circumferential direction; the valve element is driven by the input shaft to rotate to switch connection and disconnection between at least one oil outlet groove and the corresponding output pipeline connector. According to the invention, precise and flexible lubricating oil outlet proportion control can be realized, and the universality is improved.

Description

Technical Field

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

[0002] In the process of modern engine development, the valve train test bench plays a vital role. It can simulate the actual operating conditions of the engine and test and optimize the performance of the valve train. For example, the Chinese invention patent with the publication number CN110426213A discloses a hydraulic loading engine multifunctional valve train test bench, including a main structure, a transmission system, a hydraulic system, a tested body and a data acquisition system. When the test bench is working, the hydraulic oil is output from the oil pump to supply the camshaft and the rocker arm shaft for lubrication. When the high-speed solenoid valve of the high-pressure circuit is opened, the hydraulic oil fills the combustion chamber in a very short time to simulate the high pressure in the combustion chamber during engine auxiliary braking; after the high-speed solenoid valve of the control circuit is opened, the valve train is driven to enter the cylinder braking mode, and the exhaust valve overcomes the resistance and opens, forcing a small amount of hydraulic oil in the cylinder to be discharged through the exhaust duct, and the pressure in the cylinder drops instantly, thereby simulating the high pressure in the cylinder during exhaust braking, so that the operating environment of the valve train is closer to the real working conditions. However, in the field of valve train test benches, the existing oil circuit system and control valve structure have many defects. Traditional oil circuit design is often complicated, including numerous pipes and connectors, which not only increases the cost and installation difficulty of the system, but also makes maintenance and repair work cumbersome. And the existing control valve cannot accurately meet the diversified and high-precision test requirements of the valve mechanism test bench. The Chinese utility model with the announcement number CN2740874Y discloses a rotary circulation distribution valve specially used for the automatic grease injection device, which is composed of a fixed valve body and a rotating valve core with an end shaft. The valve core is provided with a cavity, and the valve body is axially segmented to provide a delivery pipeline connection port for inputting and outputting grease. The valve core is provided with a channel connecting the valve core cavity at the position corresponding to the delivery pipeline connection port of each section of the valve body, and each channel of the valve core in the rotating state is respectively connected to the delivery pipeline connection port of each section of the valve body to which it corresponds. However, the existing control valve is not flexible enough in controlling the flow rate and distribution time of the lubricating oil under different working conditions of the hydraulic loading engine multifunctional valve mechanism test bench, and has poor versatility, making it difficult to flexibly adapt to various test benches. Summary of the invention

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

[0004] The technical solution of the present invention is as follows: a fully variable rotary distribution 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 a connecting piece connected to the valve body seat is provided on the outer surface of the valve body; a first active cavity is provided in the first valve cover, and the valve body and the first active cavity are slidably matched.

[0006] In the aforementioned fully variable rotary distribution valve for the valve mechanism test bench, a plurality of arc-shaped first slide grooves are provided on the connecting member; after the valve body rotates, screws are arranged in the first slide grooves to fix the valve body seat and connect them 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 slide grooves are provided on the connecting member. After the valve body slides, screws are arranged in the second slide grooves to fix the valve body seat and thereby 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 relative position relationship between the output pipeline connection port and the oil outlet groove changes through the inclination angle, thereby realizing the control of the oil outlet time and the 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 sleeved on the input shaft, the input shaft is rotatably matched with a rotary bearing, the rotary bearing 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 matched.

[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 circumferential direction, 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 can accurately control the oil outlet time by means of the oil outlet grooves arranged at intervals on the outer surface of the valve core in the circumferential direction, in conjunction with the output pipeline connection port on the valve body, thereby realizing precise regulation of the lubricating oil outlet distribution ratio. In addition, the oil outlet groove of the present invention has an inclination angle, and by adjusting the connection mode between the connector and the valve body and the valve body seat, it is possible to flexibly regulate different oil outlet distribution ratios, realize different test conditions of the valve mechanism test bench, and adapt to valve mechanism test benches of different types and specifications, without the need for 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. 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 markings 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 cavity; 12. second valve cover; 13. rotating bearing; 14. oil inlet hole; 15. oil outlet hole; 16. valve body end cover; 17. second movable cavity; 18. annular oil groove; 19. bearing cover; 20. second lubricating oil connection port. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments, 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 attached Figure 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, and 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 by 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 in FIG. Figure 4 As shown, the outer surface of the valve core 2 is provided with oil outlet grooves 7 corresponding to the output pipeline connection port 5 and connected to the valve core cavity 6 at intervals along the circumferential direction. 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 circumferential direction of the outer surface of the valve core 2, and the interval angle is 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 through a flat key to ensure that the two move synchronously during the rotation process, and the 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 accurately adjusted according to the 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, so as to realize the on-off switching of 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 communicating with the first input pipeline connection port 4, and an oil inlet hole 14 communicating with the valve core cavity 6 is provided on the annular oil groove 18. The valve core 2 is provided with oil outlet holes 15 corresponding to the oil outlet groove 7 at intervals along the circumference, and the oil outlet holes 15 communicate 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 at least one oil outlet groove 7 and at least one output pipeline connection port 5. The annular oil groove 18 and the 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, and the oil outlet hole 15 communicates the oil outlet groove 7 with the valve core cavity 6, ensuring that the lubricating oil flows out smoothly.

[0024] A first valve cover 9 connected to the valve body seat 8 is provided on one side of the valve body 1, 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 6 bolts, and the bolts are evenly distributed on the edge of the valve cover, and the connection is firm. 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, and the first movable cavity 11 plays a guiding and certain sealing role. A second lubricating oil connection port 20 connected to the first movable cavity 11 is provided on the side of the first valve cover 9, and a sealing ring is provided at the end of the valve body 1 and is matched with the first movable cavity 11 in a clearance. The first valve cover 9 is provided with a second valve cover 12 sleeved on the input shaft 3. The second valve cover 12 is fixed on the first valve cover 9 by 4 screws. The input shaft 3 is rotatably matched with a rotating bearing 13. The rotating bearing 13 uses a deep groove ball bearing with a model of 6206. The rotating bearing 13 is arranged between the first valve cover 9 and the second valve cover 12 to reduce the friction resistance when the input shaft 3 rotates, ensure that the input shaft 3 can rotate smoothly and efficiently, reduce energy loss, and improve the reliability and durability of the distribution valve. A sealing ring and a gasket are arranged between the rotating bearing 13 and the first valve cover 9 in sequence to prevent oil leakage. The second valve cover 12 is provided with a bearing cover 19 for limiting the rotating bearing 13. The bearing cover 19 is sleeved on the input shaft 3 and connected to the second valve cover 12 by a clamping method. The bearing cover 19 axially limits the rotating bearing 13 to prevent the rotating bearing 13 from axially moving during the rotation of the input shaft 3, ensure the normal operation of the rotating bearing 13, and maintain the stable rotation of the input shaft 3.

[0025] The valve body 1 is inserted into the valve body seat 8. The outer surface of the valve body 1 is provided with a connecting piece 10 connected to the valve body seat 8. The connecting piece 10 is provided with two arc-shaped first slide grooves 10a. After the valve body 1 rotates, the first slide grooves 10a are provided with screws to fix the valve body seat 8 to fix the rotation angle of the valve body 1. The connecting piece 10 is provided with two second slide grooves 10b. After the valve body 1 slides, the second slide grooves 10b are provided with screws to fix the valve body seat 8 to fix 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 angle 7a, and the inclination angle 7a is 15°. The connecting piece 10 is used to adjust the position or angle of the valve body 1. When it is necessary to change the oil distribution ratio, loosen the screws on the connecting piece 10, move or rotate the valve body 1, and 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 through the inclination angle 7a, so as to realize the control of the oil outlet time and the distribution ratio.

[0026] The end of the valve body 1 is provided with a valve body end cover 16, and 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 slidably matched. The function of the valve body end cover 16 is to close the end of the valve body 1 and form the second movable cavity 17 between the valve core 2, so as to provide space for the sliding of the valve core 2.

[0027] The present invention can accurately control the oil outlet time by means of the oil outlet grooves 7 arranged at intervals in the circumferential direction on the outer surface of the valve core 2 in cooperation with the output pipeline connection port 5 on the valve body 1, thereby realizing accurate regulation of the lubricating oil outlet distribution ratio. In addition, the oil outlet groove 7 of the present invention has an inclination angle 7a, and by adjusting the connection mode between the connector 10 and the valve body 1 and the valve body seat 8, it is possible to flexibly regulate different oil outlet distribution ratios, realize different test conditions of the valve mechanism test bench, and adapt to valve mechanism test benches of different types and specifications, without the need for 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] When the input shaft 3 rotates driven by the driving motor, the valve core 2 rotates synchronously. The oil outlet groove 7 on the valve core 2 will periodically connect and disconnect with the output pipeline connection port 5 as it rotates. When the oil outlet groove 7 is connected with the output pipeline connection port 5, the lubricating oil in the valve core cavity 6 flows into the oil outlet groove 7 through the oil outlet hole 15, and then flows out through the output pipeline connection port 5 to enter the corresponding lubrication part of the valve mechanism test bench. The oil output can be accurately controlled according to the connection time between the oil outlet groove 7 and the output pipeline connection port 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 diversified 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) installed 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 connected to 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.

2. The fully variable rotary distribution valve for a valve train test bench according to claim 1, characterized in that: 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 the outer surface of the valve body (1) is provided with a connecting piece (10) connected to the valve body seat (8); the first valve cover (9) has a first active cavity (11), and the valve body (1) and the first active cavity (11) are slidably matched.

3. The fully variable rotary distribution valve for a valve train test bench according to claim 2, characterized in that: The connecting member (10) is provided with a plurality of arc-shaped first sliding grooves (10a); after the valve body (1) rotates, screws are arranged in the first sliding grooves (10a) to be fixedly connected to the valve body seat (8) so as to fix the rotation angle of the valve body (1).

4. The fully variable rotary distribution valve for a valve train test bench according to claim 2, characterized in that: The connecting member (10) is provided with a plurality of second sliding grooves (10b), and after the valve body (1) slides, screws are arranged in the second sliding grooves (10b) to be fixedly connected to the valve body seat (8) to fix the sliding position of the valve body (1).

5. The fully variable rotary distribution valve for a valve train test bench according to claim 3 or 4, characterized in that: One side of the oil outlet groove (7) has an inclination angle (7a); after the valve body (1) rotates or slides, the relative positional relationship between the output pipeline connection port (5) and the oil outlet groove (7) changes due to the inclination angle (7a), thereby achieving control of the oil outlet time and distribution ratio.

6. The fully variable rotary distribution valve for a valve train test bench according to claim 2, 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).

7. The fully variable rotary distribution valve for a valve train test bench according to claim 2, 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).

8. The fully variable rotary distribution valve for a valve train test bench according to claim 1, characterized in that: A valve body end cover (16) is provided at the end of the valve body (1), 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 slidably matched.

9. 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).

10. 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).

Images