CN219587883U - Control valve structure capable of being adjusted in two directions - Google Patents
Control valve structure capable of being adjusted in two directions Download PDFInfo
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- CN219587883U CN219587883U CN202320747614.0U CN202320747614U CN219587883U CN 219587883 U CN219587883 U CN 219587883U CN 202320747614 U CN202320747614 U CN 202320747614U CN 219587883 U CN219587883 U CN 219587883U
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Abstract
The utility model relates to a control valve structure capable of being adjusted in two directions, and belongs to the technical field of engineering mechanical equipment. The control valve comprises a main valve rod, a valve core and a second adjusting screw rod; one end of the main valve rod is provided with a second adjusting screw rod; the middle part of the main valve rod is vertically provided with a valve core; the other end of the main valve rod is provided with an adjusting mechanism for ensuring that the output flow of the front and rear tandem pumps is consistent when the vehicle backs; the adjusting mechanism is axially arranged along the main valve rod. The control valve provided by the utility model not only can adjust the coincidence of the output flow of the plunger pump in the forward running direction, but also can adjust the coincidence of the output flow of the plunger pump in the backward running direction, and has an important effect on optimizing the operability of the whole machine and improving the performance of products.
Description
Technical Field
The utility model relates to a control valve structure capable of being adjusted in two directions, and belongs to the technical field of engineering mechanical equipment.
Background
The control valve is an important component for realizing variable of the plunger pump, and the control valve is used for enabling the input power P (power) =Q (flow) ×P (pressure) of the plunger pump to be matched with the output power of the engine by receiving an external load pressure signal received by the plunger pump and adjusting the output flow of the plunger pump according to a servo feedback mechanism in the control valve, so that energy waste caused by insufficient power utilization of the engine or engine stopping flameout caused by the fact that the input power of the plunger pump exceeds the output power of the engine is avoided. The servo feedback mechanism of the control valve adjusts flow output by adjusting the precompression amount of the control spring according to the maximum value of the output power of the engine, when the external load reaches the preset pressure, the servo mechanism of the control valve reduces the displacement of the plunger pump, so that the product of the output flow of the plunger pump and the load pressure is ensured to be smaller than the output power of the engine at the moment, and the occurrence of flameout of the car is avoided; when the external load pressure is lower, the compression amount of the regulating control spring is less, in order to fully utilize the output power of the engine, the control valve servo feedback mechanism increases the displacement of the plunger pump, so that the product of the output flow of the plunger pump and the load pressure is close to the output power of the engine, the running speed of the system is ensured, and the output energy of the engine is fully utilized.
In the application of driving and walking of the plunger pump of the closed hydraulic system, the left and right walking motors are driven by 2 serial pumps, so that the problem that the vehicle runs fast and slow at one side is solved, the front and rear serial pumps are required to keep consistent output flow under the condition of a certain load, and therefore, higher requirements are put forward on a servo feedback mechanism of a plunger pump control valve. The front and rear pumps receive the same load signal, and the output flow rate has deviation, so that the mechanical walking is inclined towards the slow walking side, which is not acceptable. In conventional designs, additional regulation structures are often added to ensure consistent output flow from the plunger under the same load conditions. As shown in fig. 1-3, when the port X1 of the control valve receives a forward driving motor signal of load hydraulic oil, the hydraulic oil enters into the end a of the main valve rod 1 to drive the main valve rod 1 to move rightwards, the valve core 9 is locked by threads to be linked with the main valve rod 1, when the main valve rod 1 moves, the valve core 9 rotates, the rotation angle of the valve core 9 corresponds to the output flow of the plunger pump, the rotation angle of the valve core can be adjusted by adjusting the compression amount of the spring through the second adjusting screw 10, and the consistency of the output flow of the plunger pump controlled forward by the tandem pump is ensured. When the port X2 of the control valve receives a signal of a backward driving motor of the load hydraulic oil, the hydraulic oil enters the end B of the main valve rod 1 to push the main valve rod 1 to move leftwards, the rotation direction of the valve core 9 is changed, at the moment, the angle of the valve core 9 is completely determined by the load pressure and the spring stiffness, the backward output flow can not be regulated when the front and back pumps are controlled, the consistency of the output flow can only be ensured by the spring stiffness and the part machining precision, and the consistency of the output flow is difficult to achieve. Because the walking machine is to take account of the walking actions in the forward direction and the backward direction, the control valve of the conventional design at present only has an auxiliary adjustable structure in the forward walking direction, thereby ensuring the consistency of the flow in the forward direction, failing to take account of the flow consistency of the backward action, causing the deviation of the backward operation of the machine and influencing the operation performance of the whole machine.
Therefore, the technical field needs to develop a control valve structure capable of being adjusted in two directions, which not only can meet the requirement that the output flow of the front and rear pumps for driving the vehicle to walk forward is adjustable, but also can realize that the output flow of the front and rear pumps is adjustable when the vehicle walks backward, thereby ensuring the consistency of the flow, avoiding the occurrence of deviation and influencing the operation performance of the whole machine. In the current market trend of customers pursuing riding experience and high performance requirements of products, it is urgent to develop a control valve structure capable of being regulated in two directions.
Disclosure of Invention
The utility model aims to solve the technical problems that how to realize the adjustable output flow of the front and rear pumps when the vehicle is driven to walk forwards and the adjustable output flow of the front and rear pumps when the vehicle is driven to walk backwards, ensure the consistency of the flow and avoid deviation.
In order to solve the problems, the technical scheme adopted by the utility model is to provide a control valve structure capable of being regulated in two directions, wherein the control valve comprises a main valve rod, a valve core and a regulating screw rod II; one end of the main valve rod is provided with a second adjusting screw rod; the middle part of the main valve rod is vertically provided with a valve core; the other end of the main valve rod is provided with an adjusting mechanism for ensuring that the output flow of the front and rear tandem pumps is consistent when the vehicle backs; the adjusting mechanism comprises an elastic mechanism which is abutted against the other end of the main valve rod.
Preferably, the adjustment mechanism is axially disposed along the main valve stem.
Preferably, the adjusting mechanism comprises a spring, a spring seat and a first screw; the periphery of the rod body, far away from one end of the adjusting screw rod II, of the main valve rod is provided with a step-shaped structure; the periphery of the main valve rod is sleeved with a spring, one end of the spring is abutted against the step-shaped structure, and the other end of the spring is provided with a spring seat; one end of the spring seat corresponds to the tail end of the main valve rod, and the other end of the spring seat is in butt joint with one end of a screw rod I penetrating through the control valve body.
Preferably, the first screw coincides with the central axis of the main valve rod.
Preferably, the other end of the first screw is provided with an outer hexagonal screw structure which is convenient for the adjusting screw to move towards the direction of the main valve rod; the first screw is connected to the control valve through threads, and the other end of the first screw, which is arranged outside the control valve, is sleeved with a nut.
Preferably, a nut is sleeved on the periphery of the spring seat.
Preferably, the nut is fixed in the control valve body through threads, and an O-shaped ring II is arranged between the nut and the valve body.
Preferably, an O-ring I is arranged between the periphery of the spring seat and the inner wall of the nut.
Compared with the prior art, the utility model has the following beneficial effects:
the control valve provided by the utility model not only can adjust the coincidence of the output flow of the plunger pump in the forward running direction, but also can adjust the coincidence of the output flow of the plunger pump in the backward running direction, and has an important effect on optimizing the operability of the whole machine and improving the performance of products.
Drawings
FIG. 1 is a schematic view of the external appearance of a conventional control valve;
FIG. 2 is a schematic view of the cross-sectional structure A-A in FIG. 1;
FIG. 3 is a schematic view of the structure of FIG. 1 at section B-B;
FIG. 4 is a schematic view of an appearance structure of a control valve with bidirectional adjustment according to an embodiment of the present utility model;
FIG. 5 is a schematic view of the cross-sectional structure A-A of FIG. 4;
FIG. 6 is a schematic view of the cross-sectional structure B-B in FIG. 4;
reference numerals: 1. a main valve rod; 2. a spring; 3. a screw cap; 4. a spring seat; 5.O form one; 6.O form two rings; 7. a nut; 8. a first screw; 9. a valve core; 10. and adjusting a second screw rod.
Detailed Description
In order to make the utility model more comprehensible, preferred embodiments accompanied with the accompanying drawings are described in detail as follows:
as shown in fig. 1-6, the utility model provides a control valve structure capable of being regulated in two directions, wherein the control valve comprises a main valve rod 1, a valve core 9 and a regulating screw rod II 10; one end of the main valve rod 1 is provided with an adjusting screw rod II 10; the middle part of the main valve rod 1 is vertically provided with a valve core 9; the other end of the main valve rod 1 is provided with an adjusting mechanism for ensuring that the output flow of the front and rear tandem pumps is consistent when the vehicle backs up. The adjusting mechanism comprises an elastic mechanism which is abutted against the other end of the main valve rod 1; the adjusting mechanism is axially arranged along the main valve rod 1; the adjusting mechanism comprises a spring 2, a spring seat 4 and a screw rod I8; the periphery of the main valve rod 1, which is far away from one end of the second adjusting screw rod 10, is provided with a step-shaped structure; the periphery of the main valve rod 1 is sleeved with a spring 2, one end of the spring 2 is abutted against the step-shaped structure, and the other end of the spring 2 is provided with a spring seat 4; one end of the spring seat 4 corresponds to the tail end of the main valve rod 1, and the other end of the spring seat 4 is in butt joint with one end of a screw rod 8 penetrating through the control valve body. The first screw rod 8 coincides with the central axis of the main valve rod 1. The other end of the first screw rod 8 is provided with an outer hexagonal screw rod structure which is convenient for the first screw rod 8 to move towards the main valve rod 1; the first screw rod 8 is connected to the control valve through threads, and the other end of the first screw rod 8, which is arranged outside the control valve, is sleeved with a nut 7. The nut 3 is sleeved on the periphery of the spring seat 4. The nut 3 is fixed on the control valve body through threads, and an O-shaped ring II 6 is arranged between the nut 3 and the valve body. An O-shaped ring I5 is arranged between the periphery of the spring seat 4 and the inner wall of the nut 3.
Examples
As shown in fig. 4-6, the present utility model provides a control valve structure capable of bidirectional adjustment, comprising a main valve rod 1, a spring 2, a nut 3, a spring seat 4, an O-ring one 5, an O-ring two 6, a nut 7 and a screw one 8; the left side of the main valve rod 1 is designed into a step structure, and a step surface is used for fixedly placing a spring 2; the nut 3 is locked on the control valve body through threads, and forms an angle seal with the valve body through the second O-shaped ring 6 to seal hydraulic oil; the spring seat 4 is arranged in an inner hole of the nut 3, a square groove is formed in the outer circle of the spring seat 4, an O-shaped ring 5 is placed, and cylindrical sealing type sealing hydraulic oil is formed between the O-shaped ring and the inner hole of the nut 3; the nut 7 is used for locking the first screw rod 8 and has an anti-loosening effect; the first screw rod 8 is of an outer hexagonal screw rod structure, and threads are used for adjusting the precompression amount of the spring 2.
The embodiment provides a control valve for driving a walking plunger pump, referring to fig. 5, the left side of the position of a main valve rod 1 with an optimized structure is designed to be in a step shape for placing and installing a fixed spring 2, a nut 3 is locked on a control valve body through threads, and hydraulic oil is sealed through an O-shaped ring II 6. The spring seat 4 is placed in the nut 3 and is used for abutting the left end of the supporting spring 2, the O-shaped ring I5 seals hydraulic oil discharged from the outer circle of the spring seat 4 and the inner hole of the nut 3, the precompression amount of the spring 2 can be adjusted through adjusting the outer hexagon of the screw rod I8, the screw rod I8 is locked by the nut 7, the screw rod I8 is prevented from loosening, and the precompression amount of the spring 2 is changed.
The working procedure of this embodiment is as follows:
the control valve X1 receives a load hydraulic oil signal, hydraulic oil enters the cavity A of the control valve to push the main valve rod 1 to move rightwards, and because the valve core 9 and the main valve rod 1 are in a linkage state, the movement of the main valve rod 1 can cause the rotation of the valve core 9, the rotation angle of the valve core 9 determines the output flow of the plunger pump, so that the left side of the main valve rod 1 is acted by hydraulic pressure, the spring force of the right side adjustable structure is overcome, the main valve rod 1 moves rightwards, the valve core 9 rotates, and the output displacement of the plunger pump is realized. Because the spring stiffness and the part machining precision are deviated, the output flow of the plunger pump is difficult to be consistent under the condition of the same load by the two control valves, so that the output flow of the plunger pump can be kept consistent under the condition of the same load by adjusting the right adjusting screw 10, and the forward running of the machine are avoided.
In the optimized control valve structure provided by the utility model, an auxiliary adjustable structure is added to the control valve in the operation of machine backward movement, so that the output flow of the plunger pump is consistent in the operation of machine backward movement. The specific implementation is as follows: when the X2 port (a backward operation port) receives a backward load signal, hydraulic oil enters a cavity B of the control valve, the main valve rod 1 is pushed to move leftwards, the rotating direction of the valve core 9 is changed, and the output flow direction is also changed at the same time, so that the running gear is driven reversely. In order to ensure that the output flow of the plunger pump is consistent under the same load condition, the main valve rod 1 moves leftwards, and is difficult to ensure by the processing precision and the spring stiffness only through the original structure, so that when the main valve rod 1 moves leftwards, the spring seat 4 moves rightwards through the adjusting screw I8, the rotating angle of the valve core is adjusted by the compression spring 2, and when the control valves of the front tandem pump and the rear tandem pump control the backward motion, the output flow of the plunger pump is adjustable under the same load condition and is consistent, so that the deviation of the backward operation is prevented.
While the utility model has been described with respect to preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims. Equivalent embodiments of the present utility model will be apparent to those skilled in the art having the benefit of the teachings disclosed herein, when considered in the light of the foregoing disclosure, and without departing from the spirit and scope of the utility model; meanwhile, any equivalent changes, modifications and evolution of the above embodiments according to the essential technology of the present utility model still fall within the scope of the technical solution of the present utility model.
Claims (8)
1. The control valve structure capable of being adjusted bidirectionally comprises a main valve rod, a valve core and a second adjusting screw rod; one end of the main valve rod is provided with a second adjusting screw rod; the middle part of the main valve rod is vertically provided with a valve core; the device is characterized in that the other end of the main valve rod is provided with an adjusting mechanism for ensuring that the output flow of the front tandem pump and the rear tandem pump are consistent when the vehicle backs; the adjusting mechanism comprises an elastic mechanism which is abutted against the other end of the main valve rod.
2. A bi-directionally adjustable control valve structure as recited in claim 1, wherein said adjustment mechanism is disposed axially along said main valve stem.
3. The bi-directionally adjustable control valve structure of claim 1, wherein said adjustment mechanism comprises a spring, a spring seat, and a first threaded rod; the periphery of the rod body, far away from one end of the adjusting screw rod II, of the main valve rod is provided with a step-shaped structure; the periphery of the main valve rod is sleeved with a spring, one end of the spring is abutted against the step-shaped structure, and the other end of the spring is provided with a spring seat; one end of the spring seat corresponds to the tail end of the main valve rod, and the other end of the spring seat is in butt joint with one end of a screw rod I penetrating through the control valve body.
4. A bi-directionally adjustable control valve structure as recited in claim 3, wherein said first screw is coincident with a central axis of said main valve stem.
5. A bi-directionally adjustable control valve structure as claimed in claim 3, wherein the other end of said first screw is provided with an external hexagonal screw structure for facilitating movement of the adjusting screw in a direction toward the main valve stem; the first screw is connected to the control valve through threads, and the other end of the first screw, which is arranged outside the control valve, is sleeved with a nut.
6. A bi-directionally adjustable control valve structure as recited in claim 3, wherein said spring seat is provided with a nut around its periphery.
7. The bi-directionally adjustable control valve structure of claim 6, wherein the nut is threadably secured within the control valve body with a second O-ring disposed between the nut and the valve body.
8. The bi-directionally adjustable control valve structure of claim 6, wherein a first O-ring is disposed between the outer periphery of said spring seat and the inner wall of said nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320747614.0U CN219587883U (en) | 2023-04-06 | 2023-04-06 | Control valve structure capable of being adjusted in two directions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320747614.0U CN219587883U (en) | 2023-04-06 | 2023-04-06 | Control valve structure capable of being adjusted in two directions |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219587883U true CN219587883U (en) | 2023-08-25 |
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ID=87690856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320747614.0U Active CN219587883U (en) | 2023-04-06 | 2023-04-06 | Control valve structure capable of being adjusted in two directions |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219587883U (en) |
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2023
- 2023-04-06 CN CN202320747614.0U patent/CN219587883U/en active Active
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