CN114517752B

CN114517752B - Switch valve and oil supply system

Info

Publication number: CN114517752B
Application number: CN202210141425.9A
Authority: CN
Inventors: 尹燕升; 张驰; 朱宏志; 张贵华; 王建宇
Original assignee: FAW Jiefang Automotive Co Ltd
Current assignee: FAW Jiefang Automotive Co Ltd
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2023-04-11
Anticipated expiration: 2042-02-16
Also published as: CN114517752A

Abstract

The invention belongs to the technical field of oil supply systems of diesel vehicles, and discloses a switch valve and an oil supply system. According to the invention, the liquid return channel is additionally arranged on the valve body, so that oil leaked in the valve cavity can flow into the second channel through the liquid return channel under the action of pressure, the oil pressure in the valve cavity is effectively reduced, and the safe and stable operation of the switch valve is ensured.

Description

Switch valve and oil supply system

Technical Field

The invention relates to the technical field of oil supply systems of diesel vehicles, in particular to a switch valve and an oil supply system.

Background

The conventional diesel vehicle oil supply system is divided into a high pressure part and a low pressure part. The high-pressure part is arranged on an engine and comprises an oil delivery pump, a diesel fine filter, a high-pressure oil pump, a high-pressure oil rail, an oil injector and a pipeline for connecting the components. The low-pressure part is arranged on a chassis of the whole vehicle and comprises an oil tank, a diesel oil coarse filter and a pipeline for connecting the parts. The interface of the high pressure part and the low pressure part is an oil transfer pump, the oil transfer pump rotates to generate negative pressure at the inlet of the oil transfer pump, diesel oil is pumped from the low pressure part, meanwhile, the pumped negative pressure diesel oil is established into positive pressure diesel oil (generally 4-10 bar), and the positive pressure diesel oil is sent to the rear high pressure part.

In the existing diesel vehicle oil supply system, in order to realize the high-efficiency utilization of high-temperature fuel oil, a circulation passage is arranged between an oil outlet pipe and an oil return pipe which are connected with an oil tank, a switch valve is arranged on the circulation passage, and the high-temperature fuel oil flowing out of an engine is selectively led back to the engine or the fuel oil led out of the oil tank is led back to the oil tank at different stages through the opening and closing of the switch valve.

In the existing switch valve, because 100% of sealing cannot be achieved, when the switch valve is in a closed state, high-pressure fuel in an oil outlet pipe leaks into the valve cavity, and when the oil pressure in the valve cavity rises to a certain degree, the high-pressure fuel leaks to the outside, so that the safety and the stability of the switch valve are influenced.

Disclosure of Invention

The invention aims to provide a switch valve and an oil supply system, which can safely lead out fuel oil leaked in a valve cavity and ensure the safety and stability of the switch valve.

In order to achieve the purpose, the invention adopts the following technical scheme:

an on-off valve comprising:

the valve comprises a valve body, a valve cavity, a first channel and a second channel are arranged on the valve body, and the first channel and the second channel are respectively communicated with the valve cavity;

the valve core is arranged in the valve cavity and can selectively communicate the first channel with the second channel;

further comprising:

and two ends of the liquid return channel are respectively communicated with the valve cavity and the middle part of the second channel.

Preferably, the valve further comprises a sealing cover, the valve cavity is divided into a sealing cavity and an action cavity, the sealing cover is fixedly arranged in the sealing cavity, the valve core is arranged in the action cavity, and the first channel and the second channel are respectively communicated with the action cavity.

Preferably, two ends of the liquid return channel are respectively communicated with the sealed cavity and the second channel.

Preferably, the liquid return device further comprises a first sealing ring, the first sealing ring is sleeved on the periphery of the sealing cover and clamped between the inner wall of the sealing cavity and the sealing cover, and the liquid return channel is communicated with one side, facing the action cavity, of the first sealing ring.

Preferably, the valve further comprises a sealing sleeve, the sealing sleeve is sleeved on the outer side of the valve core and clamped between the inner wall of the action cavity and the valve core, two liquid passing holes are formed in the sealing sleeve and are respectively communicated with the first channel and the second channel, when the valve core is located at a communication position, two ports of the communication channel on the valve core are respectively communicated with the two liquid passing holes, and the liquid return channel is communicated with one side, facing the sealing cavity, of the sealing sleeve.

Preferably, the number of the liquid return channels is two, the two liquid return channels are respectively located at two sides of the second channel, two ends of one liquid return channel are respectively communicated with the sealing cavity and the second channel, and two ends of the other liquid return channel are respectively communicated with the action cavity and the second channel.

Preferably, a gap flow passage is formed between the valve core and the inner wall of the valve cavity and between the sealing cover and the inner wall of the valve cavity, and the liquid return passage is communicated with the gap flow passage.

Preferably, the diameter of the liquid return channel is smaller than the diameter of the second channel.

Preferably, the liquid return passage is integrally formed in the valve body.

The utility model provides an oil supply system, includes oil pipe, returns oil pipe and foretell ooff valve, the ooff valve set up in oil pipe with return between the oil pipe, first passageway intercommunication oil pipe, the second passageway intercommunication return oil pipe.

The invention has the beneficial effects that:

through add the liquid return passage on the valve body for the fluid of valve intracavity seepage can flow into the second passageway through the liquid return passage under the effect of pressure in, thereby effectively reduced the oil pressure of valve intracavity, guaranteed the operation of ooff valve safety and stability.

Drawings

Fig. 1 is a sectional view of a switching valve according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a cross-sectional view of the seal cap, first seal ring, second seal ring and seal cartridge in accordance with an embodiment of the present invention;

fig. 4 is a schematic structural diagram of the sealing sleeve according to the embodiment of the invention.

In the figure:

1. a valve body; 11. a valve cavity; 12. a first channel; 13. a second channel; 14. a liquid return channel; 15. a first flow passage; 16. a second flow passage;

2. a valve core; 21. a communication channel;

3. a sealing cover;

4. a drive shaft;

5. a first seal ring;

6. a second seal ring;

7. sealing sleeves; 71. a liquid passing hole; 72. a first sealing convex ring; 73. a second sealing convex ring; 74. a third sealing convex ring; 75. a fourth sealing convex ring; 76. and aligning the grooves.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar parts throughout, or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, unless otherwise specifically stated or limited, the terms "connected," "connected," and "fixed" are to be construed broadly and may include, for example, fixed or detachable connections, mechanical or electrical connections, direct or indirect connections via intermediate media, communication between two elements, or the interaction between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

As shown in fig. 1 to 4, the present invention provides a switching valve including a valve body 1 and a valve core 2. The valve body 1 is provided with a valve cavity 11, a first passage 12, a second passage 13 and a liquid return passage 14, the first passage 12 and the second passage 13 are respectively communicated with the valve cavity 11, two ends of the liquid return passage 14 are respectively communicated with the valve cavity 11 and the second passage 13, and the valve core 2 is arranged in the valve cavity 11 and can selectively communicate the first passage 12 with the second passage 13.

In the invention, the liquid return passage 14 is additionally arranged on the valve body 1, so that the oil leaked in the valve cavity 11 can flow into the second passage 13 through the liquid return passage 14 under the action of pressure, thereby effectively reducing the oil pressure in the valve cavity 11 and ensuring the safe and stable operation of the switch valve.

The specific structure of the on-off valve of the present invention is explained below:

the switching valve in the embodiment includes a valve body 1, a valve core 2, a sealing cover 3, a driving shaft 4, a first sealing ring 5, a second sealing ring 6, and a sealing sleeve 7.

Specifically, as shown in fig. 1 to 3, the valve body 1 serves as a support structure on which a valve chamber 11, a first passage 12, a second passage 13, a return passage 14, a first flow passage 15, and a second flow passage 16 are integrally formed.

More specifically, the first passage 12 and the second passage 13 are respectively communicated with the valve cavity 11, and the valve core 2 is arranged in the valve cavity 11 and controls the on-off of the first passage 12 and the second passage 13.

In this embodiment, the second passage 13 is communicated with the oil return pipe when in use, and because the switch valve cannot achieve 100% sealing, two ends of the liquid return passage 14 are respectively communicated with the valve cavity 11 and the second passage 13, so that oil leaked in the valve cavity 11 can flow into the second passage 13 through the liquid return passage 14 under the action of pressure, and the oil pressure in the valve cavity 11 is effectively reduced.

More specifically, the valve cavity 11 is divided into a sealing cavity and an action cavity, the sealing cover 3 is fixedly arranged in the sealing cavity, the first channel 12 and the second channel 13 are respectively communicated with the action cavity, and the valve core 2 in the action cavity controls the on-off.

In the embodiment, the sealing cavity and the actuating cavity are cylindrical structures which are coaxially communicated, and the radius of the sealing cavity is larger than that of the actuating cavity, so that the sealing cover 3 is stably and reliably assembled.

Since the sealed cavity has a communication hole for communicating with the outside for penetrating the driving shaft 4, the oil is leaked into the sealed cavity more, and in one embodiment, the liquid return channel 14 is provided with one, and two ends of the liquid return channel are respectively communicated with the sealed cavity and the second channel 13.

In another embodiment, two liquid return channels 14 are provided, the two liquid return channels 14 are respectively located at two sides of the second channel 13, two ends of one liquid return channel 14 are respectively communicated with the sealed cavity and the second channel 13, and two ends of the other liquid return channel 14 are respectively communicated with the actuating cavity and the second channel 13, so that the oil liquid in the valve chamber 11 can be returned relative to the two sides of the axis of the second channel 13.

In this embodiment, a clearance flow passage is formed in the valve chamber 11 between the valve body 2 and the inner wall of the valve chamber 11 and between the seal cover 3 and the inner wall of the valve chamber 11, and the return passage 14 communicates with the clearance flow passage and can guide the oil flow in the clearance flow passage to the second passage 13.

Specifically, both ends of the first flow channel 15 communicate with the outside, the first channel 12 communicates with the side wall of the first flow channel 15, both ends of the second flow channel 16 communicate with the outside, and the second channel 13 communicates with the side wall of the second flow channel 16. The valve body 1 can be conveniently communicated with an external pipeline by arranging the first flow passage 15 and the second flow passage 16.

In the present embodiment, the diameters of the first channel 12 and the second channel 13 are the same, the diameters of the first flow channel 15 and the second flow channel 16 are the same, the diameter of the liquid return channel 14 is smaller than the diameter of the second channel 13, and the diameter of the second channel 13 is smaller than the diameter of the second flow channel 16.

Specifically, the valve body 2 is provided with a communication passage 21, and when the valve body 2 is in the communication position, two ports of the communication passage 21 communicate with the first passage 12 and the second passage 13, respectively.

More specifically, the valve core 2 is a cylindrical structure, in this embodiment, the communicating channel 21 is radially through the valve core 2, the first channel 12 and the second channel 13 are coaxially arranged, the driving shaft 4 controls the on-off of the first channel 12 and the second channel 13 by driving the valve core 2 to rotate, when the valve core 2 is in the communicating position, the valve core 2 rotates until the communicating channel 21, the first channel 12 and the second channel 13 are coaxial, and the first channel 12 and the second channel 13 are communicated. When the spool 2 is in the open position, the spool 2 rotates until the communication passage 21 is offset from the first passage 12 and the second passage 13, and the first passage 12 and the second passage 13 are open.

Specifically, the sealing cover 3 is cylindrical and located in the sealing cavity and abutted to a step of the sealing cavity and the action cavity, an annular groove is formed in the end face, far away from the action cavity, of the sealing cover, a sealing gasket is arranged in the annular groove, the sealing cover 3 is abutted to the end wall, far away from the action cavity, of the sealing cavity through the sealing gasket, and the driving shaft 4 penetrates through the sealing gasket.

More specifically, the end face, facing the action cavity, of the sealing cover 3 is provided with an avoiding groove, and the valve core 2 partially extends into the avoiding groove.

In this embodiment, a through hole is formed through the axis of the sealing cover 3, and the driving shaft 4 is located in the through hole.

Specifically, a driving shaft 4 is connected to the valve element 2 after passing through the sealing cover 3, and a driving part such as a motor drives the valve element 2 to rotate through the driving shaft 4.

In this embodiment, a fixing groove is provided on an end surface of the valve element 2 facing the driving shaft 4, and the driving shaft 4 extends into the fixing groove to be fixedly connected with the valve element 2.

Specifically, the first sealing ring 5 is sleeved on the periphery of the sealing cover 3, and is clamped between the valve body 1 and the sealing cover 3 to serve as a static sealing ring.

More specifically, the outer side wall of the sealing cover 3 is annularly provided with a first accommodating groove, the first sealing ring 5 is sleeved in the first accommodating groove, and the driving shaft 4 is located at the axis of the first sealing ring 5.

In this embodiment, in order to ensure the sealing effect, the first sealing ring 5 is disposed away from the second channel 13 relative to the communication port between the liquid return channel 14 and the sealing cavity, that is, the liquid return channel 14 is communicated with the position between the first sealing ring 5 and the sealing sleeve 7.

Specifically, the second sealing ring 6 is sleeved on the periphery of the driving shaft 4, clamped between the sealing cover 3 and the driving shaft 4, moves along with the driving shaft 4 and serves as a movable sealing ring, and the height of the second sealing ring 6 is higher than that of the first sealing ring 5.

More specifically, the hole wall of the penetrating hole of the sealing cover 3 is annularly provided with a second accommodating groove, the second sealing ring 6 extends into the second accommodating groove, and the driving shaft 4 drives the second sealing ring 6 to rotate when rotating.

Specifically, as shown in fig. 3 and 4, the sealing sleeve 7 is sleeved outside the valve element 2, is in interference fit with the valve element 2, is clamped between the valve body 1 and the valve element 2, and is fixedly arranged relative to the valve body 1, the valve element 2 can rotate relative to the sealing sleeve 7, one axial end of the sealing sleeve 7 abuts against the sealing cover 3, the other axial end of the sealing sleeve 7 abuts against a step on the side wall of the actuating cavity, two liquid passing holes 71 are arranged on the sealing sleeve 7, the two liquid passing holes 71 are respectively communicated with the first channel 12 and the second channel 13, when the valve element 2 is in a communication position, two ports of the communication channel 21 are respectively communicated with the two liquid passing holes 71, and the first channel 12 and the second channel 13 are communicated with the two liquid passing holes 71. Through setting up seal cover 7 for the sealed more comprehensive convenient between case 2 and the valve body 1.

More specifically, the sealing sleeve 7 is a cylindrical structure with two open ends, and is sleeved on the outer peripheral wall of the valve core 2, and the two liquid passing holes 71 are located on two opposite sides of the sealing sleeve 7.

In this embodiment, the axial length of the valve element 2 is greater than the axial length of the sealing sleeve 7, the two ends of the valve element 2 extend out of the openings of the two ends of the sealing sleeve 7, one end of the valve element is connected to the driving shaft 4, and the other end of the valve element abuts against the end wall of the action cavity which deviates from one end of the sealing cavity.

Specifically, the inner side of the sealing sleeve 7 is convexly provided with a first sealing convex ring 72 around the liquid through hole 71, and the first sealing convex ring 72 abuts against the valve core 2. By providing the first sealing convex ring 72, it is possible to more reliably seal the port of the communication passage 21. The outer side of the sealing sleeve 7 is convexly provided with a second sealing convex ring 73 surrounding the liquid hole 71, and the second sealing convex ring 73 is abutted against the valve body 1. The provision of the second sealing convex ring 73 enables the ports of the first passage 12 and the second passage 13 to be more reliably sealed.

More specifically, the inner side of the sealing sleeve 7 is further provided with two third sealing convex rings 74, the two third sealing convex rings 74 respectively abut against the valve core 2, and when the valve core 2 is in the off position, the two third sealing convex rings 74 respectively surround the outer sides of the two ports of the communication passage 21.

Specifically, the outside of seal cover 7 still is provided with two fourth sealed bulge loops 75, and two fourth sealed bulge loops 75 are just right to one with two third sealed bulge loops 74, support respectively and lean on valve body 1, and balanced third sealed bulge loop 74 supports the reaction force that receives when supporting and leaning on case 2 for be in the off position when case 2, more reliable to the sealed of intercommunication passageway 21.

More specifically, the outer side of the sealing sleeve 7 is further provided with two alignment grooves 76, each fourth sealing convex ring 75 is provided with one alignment groove 76, the alignment grooves 76 extend through the sealing sleeve 7 in the axial direction and penetrate through the fourth sealing convex rings 75, a convex edge is arranged on the inner wall of the valve cavity 11 and clamped in the alignment grooves 76, and the convex edge is matched with the alignment grooves 76, so that the sealing sleeve 7 is prevented from being displaced along with the movement of the valve core 2.

In this embodiment, an angle of 90 ° is formed between the off position and the on position of the valve element 2, one first sealing convex ring 72 and one second sealing convex ring 73 are configured for each liquid passing hole 71, that is, two first sealing convex rings 72 and two second sealing convex rings 73 are provided, on the inner side and the outer side of the sealing sleeve 7, the first sealing convex rings 72 and the second sealing convex rings 73 are arranged oppositely, the third sealing convex rings 74 and the fourth sealing convex rings 75 are arranged rightly, in an upward position, the two third sealing convex rings 74 are located between the two first sealing convex rings 72, on the inner side of the sealing sleeve 7, the adjacent third sealing convex rings 74 and the first sealing convex rings 72 are located at an angle of 90 ° in a direction, the two fourth sealing convex rings 75 are located between the two second sealing convex rings 73, and on the outer side of the sealing sleeve 7, the adjacent fourth sealing convex rings 75 and the second sealing convex rings 73 are located at an angle of 90 ° in a direction.

The invention also provides an oil supply system which comprises the oil outlet pipe, the oil return pipe and the switch valve, wherein the switch valve is arranged between the oil outlet pipe and the oil return pipe, the first channel 12 is communicated with the oil outlet pipe, and the second channel 13 is communicated with the oil return pipe.

Specifically, the oil outlet pipe is directly connected to the first flow passage 15, and the return pipe is directly connected to the second flow passage 16.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An on-off valve comprising:

the valve comprises a valve body (1), wherein a valve cavity (11), a first channel (12) and a second channel (13) are arranged on the valve body (1), and the first channel (12) and the second channel (13) are respectively communicated with the valve cavity (11);

a valve core (2) which is arranged in the valve cavity (11) and can selectively communicate the first passage (12) and the second passage (13);

it is characterized by also comprising:

the two ends of the liquid return channel (14) are respectively communicated with the middle parts of the valve cavity (11) and the second channel (13);

the valve comprises a valve cavity (11) and a valve core (2), and is characterized by further comprising a sealing cover (3), wherein the valve cavity (11) is divided into a sealing cavity and an action cavity, the sealing cover (3) is fixedly arranged in the sealing cavity, the valve core (2) is arranged in the action cavity, and the first channel (12) and the second channel (13) are respectively communicated with the action cavity;

a gap flow channel is formed between the valve core (2) and the inner wall of the valve cavity (11) and between the sealing cover (3) and the inner wall of the valve cavity (11), and the liquid return channel (14) is communicated with the gap flow channel;

a penetrating hole is formed in the axis of the sealing cover (3) in a penetrating mode, a driving shaft (4) is located in the penetrating hole, and the driving shaft (4) penetrates through the sealing cover (3) and then is connected to the valve core (2);

two ends of the liquid return channel (14) are respectively communicated with the sealed cavity and the second channel (13).

2. The switch valve according to claim 1, further comprising a first sealing ring (5), wherein the first sealing ring (5) is sleeved on the periphery of the sealing cover (3) and is sandwiched between the inner wall of the sealing cavity and the sealing cover (3), and the liquid return channel (14) is communicated with one side of the first sealing ring (5) facing the action cavity.

3. The switch valve according to claim 2, further comprising a sealing sleeve (7), wherein the sealing sleeve (7) is sleeved on the outer side of the valve core (2) and clamped between the inner wall of the actuating cavity and the valve core (2), the sealing sleeve (7) is provided with two liquid passing holes (71), the two liquid passing holes (71) are respectively communicated with the first channel (12) and the second channel (13), when the valve core (2) is in a communicating position, two ports of the communicating channel (21) on the valve core (2) are respectively communicated with the two liquid passing holes (71), and the liquid return channel (14) is communicated with one side of the sealing sleeve (7) facing the sealing cavity.

4. The switch valve according to claim 1, wherein the liquid return channel (14) is provided with two liquid return channels (14), the two liquid return channels (14) are respectively located at two sides of the second channel (13), two ends of one liquid return channel (14) are respectively communicated with the sealing cavity and the second channel (13), and two ends of the other liquid return channel (14) are respectively communicated with the actuating cavity and the second channel (13).

5. The switch valve according to claim 1, characterized in that the diameter of the liquid return passage (14) is smaller than the diameter of the second passage (13).

6. Switching valve according to claim 1, characterized in that the return channel (14) is integrated in the valve body (1).

7. An oil supply system, comprising an oil outlet pipe, an oil return pipe, and the switching valve according to any one of claims 1 to 6, wherein the switching valve is disposed between the oil outlet pipe and the oil return pipe, the first passage (12) communicates with the oil outlet pipe, and the second passage (13) communicates with the oil return pipe.