Balance valve and fluid control assembly

Abstract

The utility model belongs to the technical field of hydraulic pressure, and discloses a balance valve and a fluid control assembly. The balance valve comprises a valve sleeve, a valve seat and a valve element body, an assembly cavity is formed in the valve sleeve, the valve seat is located at one end of the valve sleeve, the valve element body is arranged in the assembly cavity in a sliding mode and elastically connected with the valve seat, a throttling channel is arranged between the valve element body and the valve sleeve, and the throttling channel is configured to conduct throttling on media flowing along the assembly cavity. When the valve element body opens the assembling cavity, the throttling effect can be achieved, the moving speed of the valve element body is effectively controlled, the valve element body is prevented from being rapidly pushed away by hydraulic oil, slow and stable movement of the valve element body is achieved, and vibration of a hydraulic system is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulics, in particular to a balancing valve and a fluid control component. Background Art

[0002] At present, a large number of hydraulic lifting and lowering circuits are used in the engineering machinery industry. The balancing valve plays the role of load maintenance, load control, and load smooth lowering in controlling the lifting and lowering circuit. Therefore, the performance of the balancing valve directly affects the performance of the hydraulic press.

[0003] The balancing valves currently on the market mainly include a main valve sleeve and a main valve core. The main valve sleeve is assembled in the valve body, the main valve core is assembled in the valve sleeve, the main valve core is elastically connected to the valve seat, and an assembly cavity is formed between the main valve core and the inner wall of the valve sleeve. When the balancing valve assembly cavity is opened, the pressure of the oil pushes the main valve core to move instantly. The impact force of the oil on the main valve core is large, which can easily cause the hydraulic system to shake.

[0004] Therefore, there is an urgent need for a balancing valve to solve the problems in the above technology. Utility Model Content

[0005] The purpose of the utility model is to provide a balancing valve, which reduces the axial size of the balancing valve, improves the integration of the balancing valve, and realizes slow and smooth movement of the valve core body to avoid vibration of the hydraulic system.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Balancing valve, including:

[0008] A valve sleeve, wherein an assembly cavity is provided in the valve sleeve;

[0009] a valve seat located at one end of the valve sleeve;

[0010] A valve core body is slidably arranged in the assembly cavity and elastically connected to the valve seat. A throttling channel is provided between the valve core body and the valve sleeve, and the throttling channel is configured to throttle the medium flowing along the assembly cavity.

[0011] Optionally, the outer wall of the valve core body is further provided with an acting portion, the valve sleeve includes a valve mouth portion, the valve mouth portion has a valve port, and the balancing valve includes a first working condition. Under the first working condition, the valve mouth portion abuts against part of the acting portion to close the valve port, and along the axial extension direction of the acting portion, there is a flow gap between the valve mouth portion and the acting portion, and along the movement direction of the valve core body, the flow gap decreases.

[0012] Optionally, the action portion includes a first inclined surface, and the valve mouth portion includes a second inclined surface, and the slope of the first inclined surface is greater than the slope of the second inclined surface, so that the flow gap is formed between the action portion and the valve mouth portion.

[0013] Optionally, the outer wall of the valve core body is provided with a first flow portion, the inner wall of the valve sleeve is provided with a second flow portion, a throttling channel is formed between the first flow portion and the second flow portion, and the action portion also includes a recessed portion, which is located between the action portion and the first flow portion, and the recessed portion is radially concave inwardly along the valve core body, and the recessed portion is respectively connected to the flow gap and the throttling channel.

[0014] Optionally, an oil passage is provided on the first flow portion, and the oil passage includes a guide groove and a sink groove. The first end of the guide groove is connected to the sink groove, and the second end of the guide groove is connected to the throttling channel. The width of the guide groove gradually decreases from the first end to the second end of the guide groove.

[0015] Optionally, a convex portion is provided on the second flow portion, the convex portion is located at the inlet of the throttling channel, and at least a part of the convex portion is located in the guide groove.

[0016] Optionally, the balancing valve also includes a one-way valve assembly, an oil inlet channel is provided in the valve core body, the one-way valve assembly includes a limiting portion and a one-way valve core, the limiting portion is provided at the oil inlet end of the oil inlet channel, the one-way valve core is slidably provided in the oil inlet channel and is elastically connected to the valve core body, the one-way valve core can selectively separate from or abut against the limiting portion to open or close the oil inlet channel.

[0017] Optionally, a sealing portion and a pilot portion are provided on the valve core body, the sealing portion is sealedly connected to the valve sleeve to separate an accommodating space in the valve sleeve, the pilot portion is located in the accommodating space, a throttling groove and a throttling plug are provided on the pilot portion, the throttling plug is detachably arranged in the throttling groove, a throttling hole is provided on the throttling plug, and the throttling hole is configured to throttle the pilot oil.

[0018] The purpose of the utility model is to provide a fluid control assembly, which makes the structure of the fluid control assembly more compact and the layout of the fluid control assembly more flexible.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] The fluid control assembly comprises a valve body and the above-mentioned balancing valve, wherein a valve cavity is provided in the valve body, and the balancing valve is inserted in the valve cavity.

[0021] Beneficial effects:

[0022] The utility model provides a balancing valve, including a valve sleeve, a valve seat and a valve core body. The valve sleeve is provided with an assembly cavity, the valve seat is located at one end of the valve sleeve, the valve core body is slidably arranged in the assembly cavity, and is elastically connected to the valve seat, a throttling channel is provided between the valve core body and the valve sleeve, and the throttling channel is configured to throttle the medium flowing along the assembly cavity, which can achieve a throttling effect when the valve core body opens the assembly cavity, effectively control the movement speed of the valve core body, avoid the valve core body being quickly pushed open by the hydraulic oil, realize slow and smooth movement of the valve core body, and avoid vibration of the hydraulic system.

[0023] The fluid control assembly provided by the utility model includes a valve body and the above-mentioned balancing valve. A valve cavity is provided in the valve body, and the balancing valve is inserted in the valve cavity, making the structure of the fluid control assembly more compact and the layout of the fluid control assembly more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A cross-sectional view of the balancing valve provided by the utility model;

[0025] Figure 2 yes Figure 1 Enlarged view of point B in the middle;

[0026] Figure 3 It is a schematic diagram of the force-bearing surface of the action part provided by the utility model;

[0027] Figure 4 This is a structural diagram of the valve core body provided by the utility model;

[0028] Figure 5 This is a cross-sectional view of the valve core body provided by the utility model;

[0029] Figure 6 yes Figure 5 A partial enlarged view of point A in the middle;

[0030] Figure 7 This is a schematic diagram of the force-bearing surface of the pilot part provided by the utility model;

[0031] Figure 8 It is a structural schematic diagram of the fluid component provided by the utility model.

[0032] In the picture:

[0033] 100, valve core body; 110, oil inlet passage; 111, groove; 120, first flow portion; 121, throttling passage; 130, operating portion; 131, first inclined surface; 132, flow clearance; 133, force-bearing surface of the operating portion; 134, recess; 140, oil passage; 141, guide groove; 142, sink groove; 150, sealing portion; 151, third annular sealing groove; 152, third sealing ring; 160, pilot portion; 161, throttling groove; 162, throttling plug; 1621, throttling hole; 163, force-bearing surface of the pilot portion; 170, second through hole;

[0034] 200, one-way valve assembly; 210, limiting portion; 211, limiting sleeve; 212, retaining ring; 220, one-way valve core; 221, ball; 222, first elastic member;

[0035] 300, valve body; 310, oil inlet; 320, oil outlet; 330, pilot oil port;

[0036] 400, valve seat; 410, second elastic member;

[0037] 500, valve sleeve; 510, assembly chamber; 520, second flow portion; 521, second inclined surface; 530, first through hole; 540, first channel; 550, first sealing ring; 560, second sealing ring; 570, second channel;

[0038] 1000, first sealing line;

[0039] 2000, the second sealing line. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0041] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0044] This embodiment provides a balancing valve, such as Figure 1-Figure 7 As shown, it includes a valve sleeve 500, a valve seat 400 and a valve core body 100, the valve sleeve 500, an assembly cavity 510 is provided in the valve sleeve 500, the valve seat 400 is located at one end of the valve sleeve 500, the valve core body 100 is slidably arranged in the assembly cavity 510, and is elastically connected to the valve seat 400, a throttling channel 121 is provided between the valve core body 100 and the valve sleeve 500, and the throttling channel 121 is configured to throttle the medium flowing along the assembly cavity 510, and can play a throttling effect when the valve core body 100 opens the assembly cavity 510, effectively controlling the movement speed of the valve core body 100, avoiding the valve core body 100 being quickly pushed open by the hydraulic oil, and realizing slow and smooth movement of the valve core body 100, avoiding vibration of the hydraulic system.

[0045] Alternatively, as Figure 2 As shown, the outer wall of the valve core body 100 is provided with a first flow portion 120, and the inner wall of the valve sleeve 500 is provided with a second flow portion 520. A throttling channel 121 is formed between the first flow portion 120 on the outer wall of the valve core body 100 and the second flow portion 520 on the inner wall of the valve sleeve 500. The throttling channel 121 formed between the first flow portion 120 on the outer wall of the valve core body 100 and the second flow portion 520 on the inner wall of the valve sleeve 500 effectively regulates the flow of hydraulic oil, effectively reducing the impact of the hydraulic oil on the valve core body 100, preventing the oil from quickly pushing the valve core body 100 away, and significantly improving the performance of the balancing valve and the stability of the hydraulic system.

[0046] For example, the valve port is closed as the first working condition ( Figure 3As shown), when the valve port is open, it is the second working condition. When the balancing valve switches from the first working condition to the second working condition, the movement direction of the valve core body 100 is from right to left. At this time, the hydraulic oil enters the assembly cavity 510 of the valve sleeve 500 from the second channel 570, and flows through the throttling channel 121, the flow gap 132, and the first channel 540 in sequence.

[0047] like Figure 2 As shown, the outer wall of the valve core body 100 is further provided with an operating portion 130. The valve sleeve 500 includes a valve port portion having a valve port. The valve sleeve 500 also includes a first channel 540 and a second channel 570. The first channel 540 communicates with the oil inlet 310, and the second channel 570 communicates with the oil outlet 320. The balancing valve core can open the valve port to connect the first channel 540 and the second channel 570, thereby connecting the oil inlet 310 and the oil outlet 320, and lowering the oil cylinder. In the first operating state, the valve port portion abuts against a portion of the operating portion 130 to close the valve port. A flow gap 132 is defined between the valve port portion and the operating portion 130 along the axial extension direction of the operating portion 130. The flow gap 132 gradually decreases from the side near the first flow portion 120 to the side near the second flow portion 520, thereby increasing the area of action of the oil and ensuring that the oil smoothly pushes the valve core body 100 to move.

[0048] It should be noted that the projection of the first inclined surface 131 in the axial direction of the valve core body 100 is the force-bearing surface 133 of the action portion of the valve core body 100. Figure 2 shown.

[0049] Alternatively, as Figure 2 As shown, the operating portion 130 includes a first inclined surface 131, and the valve opening portion includes a second inclined surface 521. The slope of the first inclined surface 131 is greater than the slope of the second inclined surface 521, thereby forming a flow gap 132 between the operating portion 130 and the valve opening portion. The flow gap 132 decreases along the movement direction of the valve core body 100, thereby increasing the force-bearing area of the valve core body 100. The presence of the first inclined surface 131 also enables the hydraulic oil to generate a relatively smooth thrust when contacting the valve core body 100, ensuring the stability of the movement of the valve core body 100. In this embodiment, under the first operating condition, the second flow portion 520 abuts the operating portion 130 to form a second linear sealing structure. This second linear sealing structure can improve the response speed and reliability of the hydraulic system, providing users with higher operating precision and safety.

[0050] Alternatively, as Figure 2As shown, the action portion 130 also includes a recess 134, which is located between the action portion 130 and the first flow portion 120, and the recess 134 is concave inward along the radial direction of the valve core body 100. The recess 134 is respectively connected to the throttling channel 121 and the flow gap 132, which can reduce the radial size of the valve core body 100, reduce the contact area between the valve core body 100 and the valve sleeve 500, and further reduce the wear of the valve core body 100.

[0051] Alternatively, as Figure 4 As shown, the first flow section 120 is provided with an oil port 140, located at one end of the first flow section 120 near the oil outlet 320. The oil port 140 includes a guide groove 141 and a sink groove 142. The first end of the guide groove 141 communicates with the sink groove 142, and the second end of the guide groove 141 communicates with the throttling channel 121. The width of the guide groove 141 gradually decreases from the first end to the second end. The oil port 140 utilizes a combined design of the guide groove 141 and the sink groove 142, which reduces the contact area between the valve core body 100 and the valve sleeve 500, lowering the frictional resistance of the valve core movement. This allows for smooth opening of the oil port 140 on the valve core body 100, enabling smooth control of the cylinder's descent speed and reducing shock and vibration in the hydraulic system. In this embodiment, the guide groove 141 is a tapered groove, and the sink groove 142 is a waist-shaped sink groove.

[0052] Optionally, a convex portion is provided on the second flow portion 520, which is located at the entrance of the throttling channel 121, and at least part of the convex portion is located in the guide groove 141, which can further improve the throttling effect of the throttling channel 121 and ensure that the valve core body 100 moves smoothly when the valve port is opened.

[0053] Alternatively, as Figure 1 and Figure 5 As shown, the balancing valve also includes a one-way valve assembly 200, an oil inlet channel 110 is provided in the valve core body, and the one-way valve core 220 includes a ball 221 and a first elastic member 222. The ball 221 is arranged in the oil inlet channel 110 and is located at the end of the limiting portion 210 away from the oil inlet end. The first elastic member 222 is arranged in the oil inlet channel 110, one end of the first elastic member 222 abuts against the valve core body 100, and the other end abuts against the ball 221. The first elastic member 222 can apply a force to the ball 221 to make the ball 221 abut against the limiting portion 210. It can be understood that when the oil inlet pressure of the oil inlet channel 110 is greater than the elastic force of the first elastic member 222, the first elastic member 222 is compressed and the oil inlet channel 110 is opened; when the oil inlet pressure is less than the pressure of the first elastic member 222, the first elastic member 222 drives the ball 221 to abut against the limiting portion 210, forming a first linear sealing structure (such as Figure 2 As shown), the oil inlet passage 110 is closed.

[0054] In this embodiment, the first elastic member 222 is a spring, which can provide sufficient elastic force for the ball 221 to make the ball 221 abut against the limiting portion 210, ensuring the sealing of the oil inlet channel 110 and responding faster when the oil inlet pressure changes, thereby improving the reliability of the balancing valve core.

[0055] Alternatively, as Figure 5 As shown, the limiting portion 210 includes a limiting sleeve 211 and a retaining ring 212. The limiting sleeve 211 is interference-fitted within the oil inlet passage 110. A groove 111 is provided on the inner wall of the oil inlet passage 110, and the retaining ring 212 is disposed within the groove 111. At least a portion of the retaining ring 212 protrudes from the groove 111. The end of the limiting sleeve 211 away from the one-way valve core 220 abuts against at least a portion of the retaining ring 212. By interference-fitting the limiting sleeve 211 within the oil inlet passage 110 and retaining the limiting sleeve 211 by the retaining ring 212, the dual limiting structure ensures the stability of the limiting sleeve 211 within the oil inlet passage 110.

[0056] In this embodiment, the retaining ring 212 is a steel wire retaining ring 212, and the ball 221 is a steel ball, which not only enhances the wear resistance and strength of the one-way valve assembly 200, but also ensures that the one-way valve assembly 200 can still maintain stable performance under high pressure and high frequency working conditions.

[0057] Optionally, the balancing valve further includes a second elastic member 410. A limiting groove is provided at the entrance of the oil inlet passage 110. One end of the second elastic member 410 abuts the valve seat 400, while the other end is located within the limiting groove and abuts the valve core body 100. The provision of the second elastic member 410 provides a restoring force for the valve core body 100. After the oil cylinder descends into position, the second elastic member 410 drives the valve core body 100 to reset, forming a second linear seal between the valve core body 100 and the valve sleeve 500, preparing for the next lift. In this embodiment, the second elastic member 410 is a spring, which can provide a stable restoring force, ensuring that the valve core body 100 can quickly return to its original position after the oil cylinder is lowered.

[0058] Alternatively, as Figure 1As shown, the valve core body 100 is provided with a sealing portion 150 and a pilot portion 160. The sealing portion 150 is sealedly connected to the valve sleeve 500 to separate an accommodation space within the valve sleeve 500. The pilot portion 160 is located within the accommodation space. The pilot portion 160 is provided with a throttle groove 161 and a throttle plug 162. The throttle plug 162 is detachably mounted on the throttle groove 161 and has a throttle hole 1621. If the return oil pressure in the assembly chamber 510 is insufficient during the lowering of the oil cylinder, pilot oil is introduced into the throttle groove 161 and flows out through the throttle hole 1621. The pilot oil flowing out of the throttle hole 1621 enters the accommodation space enclosed by the valve body 300, the pilot portion 160, and the valve sleeve 500, providing the valve core body 100 with the elastic force to overcome the second elastic member 410, thereby ensuring that the oil cylinder is lowered into position.

[0059] Optionally, a first through hole 530 is provided on the valve sleeve 500, and a second through hole 170 is provided on the pilot part 160. The pilot oil port 330, the first through hole 530 and the second through hole 170 are connected in sequence, and the second through hole 170 is connected to the throttle groove 161, so that the pilot oil can flow out of the throttle hole 1621 and into the accommodating space. The pressure of the pilot oil acts on the rightmost end of the pilot part 160 (on the force surface 163 of the pilot part), and with the help of the pressure of the pilot oil, the valve core body 100 is driven to continue to compress the second elastic member 410 to ensure that the valve port is in an open state until the oil cylinder drops into place.

[0060] Optionally, a first annular sealing groove and a second annular sealing groove are provided at intervals along the axial direction of the valve core body 100, the first annular sealing groove is located between the oil inlet 310 and the oil outlet 320, and the second annular sealing groove is located between the oil outlet 320 and the pilot oil port 330, a first sealing ring 550 is provided in the first annular sealing groove, the first sealing ring 550 can prevent oil from flowing through the valve cavity between the oil inlet 310 and the oil outlet 320, a second sealing ring 560 is provided in the second annular sealing groove, the second sealing ring 560 can prevent oil from flowing through the valve cavity between the oil outlet 320 and the pilot oil port 330, thereby ensuring that the hydraulic oil between the various oil circuits does not cross-leak, thereby maintaining the stability and safety of the system.

[0061] Optionally, a first annular sealing groove and a second annular sealing groove are provided at intervals along the axial direction of the valve core body 100, the first annular sealing groove is located between the oil inlet 310 and the oil outlet 320, and the second annular sealing groove is located between the oil outlet 320 and the pilot oil port 330, a first sealing ring 550 is provided in the first annular sealing groove, the first sealing ring 550 can prevent oil from flowing through the valve cavity between the oil inlet 310 and the oil outlet 320, a second sealing ring 560 is provided in the second annular sealing groove, the second sealing ring 560 can prevent oil from flowing through the valve cavity between the oil outlet 320 and the pilot oil port 330, thereby ensuring that the hydraulic oil between the various oil circuits does not cross-leak, thereby maintaining the stability and safety of the system.

[0062] Optionally, a third annular sealing groove 151 is provided on the sealing portion 150 , and a third sealing ring 152 is provided in the third annular sealing groove 151 . The third sealing ring 152 is used to prevent oil from leaking between the oil outlet 320 and the pilot oil port 330 through the space in the valve sleeve 500 .

[0063] Optionally, a fourth groove 111 is provided on the valve seat 400 , and a fourth sealing ring is provided in the fourth groove 111 . The fourth sealing ring is used to seal the connection between the valve seat 400 and the valve body 300 to prevent leakage of hydraulic oil in the valve cavity.

[0064] like Figure 8 As shown, this embodiment also provides a fluid control component, including a valve body 300 and the balancing valve in Example 2. A valve cavity is provided in the valve body 300, and the balancing valve is inserted in the valve cavity, so that the structure of the fluid control component is more compact and the layout of the fluid control component is more flexible.

[0065] Optionally, a fourth annular sealing groove is provided on the valve seat 400 , and a fourth sealing ring is provided in the fourth annular sealing groove. The fourth sealing ring is used to seal the connection between the valve seat 400 and the valve body 300 to prevent leakage of hydraulic oil in the valve cavity.

[0066] Specifically, a valve cavity is provided on the valve body 300, and the valve cavity has an oil inlet 310, an oil outlet 320, and a pilot oil port 330. The balancing valve is inserted into the valve cavity. The detailed working process of the fluid control assembly provided in this embodiment is as follows:

[0067] Specifically, the detailed working process of the balancing valve provided in this embodiment is as follows:

[0068] When the oil cylinder needs to rise, the oil outlet 320 is connected to the oil inlet 310 of the oil cylinder, and then oil is injected into the balance valve through the oil inlet 310. The oil enters the valve core body 100 through the first channel 540 on the valve sleeve 500, and the pressure of the oil acts on the abutment between the ball 221 and the limit sleeve 211 ( Figure 6 When the pressure exceeds the elastic force of the first elastic member 222, the ball 221 moves to the right, thereby guiding the oil in the oil inlet 310 to the oil outlet 320, thereby achieving the purpose of controlling the oil cylinder to rise;

[0069] When the oil cylinder needs to descend, the pressure oil of the oil outlet 320 acts on the oil through the oil port 140, the throttle channel 121, and the flow gap 132. Figure 2At the second sealing line 2000 in the middle, when the pressure exceeds the pre-tightening force of the second elastic member 410, the valve core body 100 is driven to move left, the pressure oil is unloaded, and the oil cylinder descends; the structure of the guide groove 141 and the sink groove 142 reduces the contact area between the valve core body 100 and the valve sleeve 500, reduces the friction of the valve core body 100 movement, and can smoothly open the oil port 140 of the valve core body 100, thereby smoothly controlling the descending speed and reducing the impact and vibration of the hydraulic system;

[0070] When the pressure oil of the oil outlet 320 is insufficient to overcome the elastic force of the second elastic member 410, the pilot oil enters the second through hole 170 of the valve core body 100 through the pilot oil port 330 and the first through hole 530, and enters the rightmost accommodation space of the valve core body 100 through the throttle groove 161 on the valve core body 100 and the throttle hole 1621 on the throttle plug 162. The pilot part force surface 163 is the area of the rightmost end of the pilot part 160 (such as Figure 7 As shown), the valve core body 100 moves to the left, the pressure oil is unloaded, and the oil cylinder continues to descend until it descends to the initial position before rising. The throttle groove 161 and the throttle hole 1621 can play a certain buffering role in the process of the oil cylinder descending, reducing the impact of the pressure of the pilot oil on the valve core body 100, and improving the stability of the movement of the valve core body 100.

[0071] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Balancing valve, characterized in that, include: A valve sleeve (500), wherein an assembly cavity (510) is provided in the valve sleeve (500); a valve seat (400) located at one end of the valve sleeve (500); A valve core body (100) is slidably disposed in the assembly cavity (510) and elastically connected to the valve seat (400). A throttling channel (121) is provided between the valve core body (100) and the valve sleeve (500). The throttling channel (121) is configured to throttle a medium flowing along the assembly cavity (510).

2. The balancing valve according to claim 1, characterized in that: The outer wall of the valve core body (100) is further provided with an acting portion (130), the valve sleeve (500) includes a valve mouth portion, the valve mouth portion has a valve port, and the balancing valve includes a first working condition. Under the first working condition, the valve mouth portion abuts against a portion of the acting portion (130) to close the valve port, and along the axial extension direction of the acting portion (130), a flow gap (132) is provided between the valve mouth portion and the acting portion (130), and along the movement direction of the valve core body (100), the flow gap (132) decreases.

3. The balancing valve according to claim 2, characterized in that: The action portion (130) includes a first inclined surface (131), and the valve mouth portion includes a second inclined surface (521). The slope of the first inclined surface (131) is greater than the slope of the second inclined surface (521), so that the flow gap (132) is formed between the action portion (130) and the valve mouth portion.

4. The balancing valve according to claim 3, characterized in that: The outer wall of the valve core body (100) is provided with a first flow portion (120), and the inner wall of the valve sleeve (500) is provided with a second flow portion (520), and a throttling channel (121) is formed between the first flow portion (120) and the second flow portion (520), and the action portion (130) also includes a recess (134), and the recess (134) is located between the action portion (130) and the first flow portion (120), and the recess (134) is concave inward along the radial direction of the valve core body (100), and the recess (134) is respectively connected to the flow gap (132) and the throttling channel (121).

5. The balancing valve according to claim 4, characterized in that: An oil passage port (140) is provided on the first flow portion (120), and the oil passage port (140) comprises a guide groove (141) and a sink groove (142). A first end of the guide groove (141) is communicated with the sink groove (142), and a second end of the guide groove (141) is communicated with the throttling channel (121). In a direction from the first end to the second end of the guide groove (141), the width of the guide groove (141) gradually decreases.

6. The balancing valve according to claim 5, characterized in that: A convex portion is provided on the second flow portion (520), the convex portion is located at the entrance of the throttling channel (121), and at least a portion of the convex portion is located in the guide groove (141).

7. The balancing valve according to claim 1, characterized in that: The balancing valve further comprises a one-way valve assembly (200), an oil inlet passage (110) is provided in the valve core body (100), the one-way valve assembly (200) comprises a limiting portion (210) and a one-way valve core (220), the limiting portion (210) is provided at the oil inlet end of the oil inlet passage (110), the one-way valve core (220) is slidably provided in the oil inlet passage (110) and elastically connected to the valve core body (100), the one-way valve core (220) can selectively separate from or abut against the limiting portion (210) to open or close the oil inlet passage (110).

8. The balancing valve according to claim 1, characterized in that: The valve core body (100) is provided with a sealing portion (150) and a pilot portion (160), and the sealing portion (150) is sealedly connected to the valve sleeve (500) to separate an accommodating space in the valve sleeve. The pilot portion (160) is located in the accommodating space. The pilot portion (160) is provided with a throttling groove (161) and a throttling plug (162), and the throttling plug (162) can be detachably arranged in the throttling groove (161). The throttling plug (162) is provided with a throttling hole (1621), and the throttling hole (1621) is configured to throttle the pilot oil.

9. A fluid control assembly, characterized in that The invention comprises a valve body (300) and a balancing valve according to any one of claims 1 to 8, wherein a valve cavity is provided in the valve body (300), and the balancing valve is inserted in the valve cavity.

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