CN220354183U - Controller feedback cylinder and closed pump power controller - Google Patents
Controller feedback cylinder and closed pump power controller Download PDFInfo
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- CN220354183U CN220354183U CN202321941568.4U CN202321941568U CN220354183U CN 220354183 U CN220354183 U CN 220354183U CN 202321941568 U CN202321941568 U CN 202321941568U CN 220354183 U CN220354183 U CN 220354183U
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- spring
- piston rod
- bushing
- controller
- plug
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- 238000006073 displacement reaction Methods 0.000 description 20
- 239000003921 oil Substances 0.000 description 16
- 230000008859 change Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- Control Of Positive-Displacement Pumps (AREA)
Abstract
The utility model relates to the technical field of engineering machinery, in particular to a controller feedback cylinder and a closed pump power controller. A controller feedback cylinder comprising: the shell is internally provided with a bushing, a spring seat and a piston rod; the bushing is fixedly arranged at one end of the shell, the piston rod penetrates through the bushing and can extend out of the shell, and the spring seat is sleeved at one end, far away from the bushing, of the piston rod; the spring seat outer wall is provided with the flange, and the inner wall is provided with the spring chamber, the spring seat flange with be provided with first spring between the casing, the bush has cup jointed the second spring outward, and initial state's second spring with the interior terminal surface in spring chamber has the distance of setting. The double-spring structure of the utility model ensures that the high-pressure and the extension of the piston are in a zigzag shape, thereby realizing the purpose of constant power.
Description
Technical Field
The utility model relates to the technical field of engineering machinery, in particular to a controller feedback cylinder and a closed pump power controller.
Background
The power controller controls the oil flow in the hydraulic system, so that the action control of the mechanical device is realized. The existing power controller comprises a pilot valve and a feedback cylinder, wherein the pilot valve comprises a pilot valve body and a pilot valve rod which is arranged in the pilot valve body in a sliding mode, and the pilot valve rod is used for controlling a swash plate of the variable pump to swing. The both ends of pilot valve all are provided with the feedback jar, and the feedback jar includes feedback cylinder body and with feedback cylinder body sliding fit's piston rod, and when the pilot valve pole moved to the direction of piston rod, the piston rod can be adjusted its butt in the size of the butt force of pilot valve pole under the effect of hydraulic oil.
However, the existing closed pump controller feedback cylinder is of a single spring structure, the force is in direct proportion to the spring displacement, the feedback speed is the same, the power is wasted, the constant torque cannot be well fitted, and the closed pump controller feedback cylinder is difficult to apply to working conditions with constant torque requirements.
Disclosure of Invention
Aiming at the defects existing in the prior art, the embodiment of the utility model aims to provide a controller feedback cylinder which adopts a double-spring structure to enable high-pressure and the extension amount of a piston to be in a zigzag shape so as to realize the purpose of constant power.
In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:
a controller feedback cylinder comprising: the shell is internally provided with a bushing, a spring seat and a piston rod; the bushing is fixedly arranged at one end of the shell, the piston rod penetrates through the bushing and can extend out of the shell, and the spring seat is sleeved at one end, far away from the bushing, of the piston rod; the spring seat outer wall is provided with the flange, and the inner wall is provided with the spring chamber, the spring seat flange with be provided with first spring between the casing, the bush has cup jointed the second spring outward, and initial state's second spring with the interior terminal surface in spring chamber has the distance of setting.
Preferably, the shell comprises a valve sleeve and a plug, the valve sleeve and the plug are detachably connected, the valve sleeve, the plug and the bushing enclose an oil cavity, and the piston rod, the spring seat, the first spring and the second spring are located in the oil cavity.
Preferably, the valve sleeve is in threaded connection with the plug, an oil hole is formed in the plug, the oil hole is communicated with the oil cavity, and threads connected with the controller body are formed in the outer wall of one end, away from the plug, of the valve sleeve.
Preferably, a valve core is further arranged in the oil cavity, the valve core is located between the plug and the piston rod, a boss is arranged at one end, facing the plug, of the valve core, and the other end of the valve core abuts against the spring seat.
Preferably, the piston rod is provided with a clamping section, a middle section and a sliding section in sequence, one end of the valve core, which is away from the plug, is provided with a clamping groove, the clamping section of the piston rod is installed in the clamping groove of the valve core, and the sliding section penetrates through the bushing and can extend out of the shell.
Preferably, a clamping ring is arranged at one end of the valve sleeve, which is far away from the plug, the bushing is arranged in the clamping ring, and one end of the first spring abuts against the end face of the clamping ring.
Preferably, one end of the valve sleeve, which is far away from the clamping ring, is provided with a shaft body, the first end of the second spring is sleeved on the shaft body, and the second end of the second spring is sleeved on the middle section of the piston rod.
Preferably, the distance from the end face of the clamping ring to the end face of the flange of the spring seat is smaller than the length of the first spring in the initial state, and the distance from the shaft shoulder of the shaft body to the inner end face of the spring cavity is larger than the length of the second spring in the initial state.
Preferably, a first washer is arranged between the first spring and the end face of the clamping ring, and a second washer is arranged between the second spring and the shaft shoulder of the shaft body.
The embodiment of the utility model also provides a closed pump power controller, and two ends of the controller are respectively provided with the controller feedback cylinder.
One or more technical solutions provided in the embodiments of the present utility model at least have the following technical effects or advantages:
the utility model adopts a feedback cylinder and parallel double-spring structure, so that the displacement change of the closed variable pump is not only related to the pilot pressure, but also related to the working pressure of the closed variable pump. When the pilot pressure is fixed, the displacement of the pilot pressure is inversely proportional to the extension length of the piston rod of the feedback cylinder along with the increase of the working pressure of the closed variable pump, namely: the higher the working pressure of the closed variable pump is, the longer the extension length of the piston rod of the feedback cylinder is, the smaller the displacement of the closed variable pump is, the change of the displacement and the working pressure accords with the fold line change of the parallel double springs, and the constant torque can be well fitted by utilizing the double fold line to fit a constant power curve, so that the closed variable pump can be suitable for various working conditions with constant torque requirements.
Additional aspects of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
FIG. 1 is a schematic diagram of a controller feedback cylinder provided by an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a controller provided by an embodiment of the present utility model;
FIG. 3 is a graph of dual spring feedback cylinder pressure provided by an embodiment of the present utility model;
in the figure: 01. a feedback cylinder; 02. a controller body; 03. a pilot valve stem; 1. plugging; 2. a first gasket; 3. a valve core; 4. a valve sleeve; 5. a bushing; 6. a second gasket; 7. a spring seat; 8. a piston rod; 9. a first spring; 10. a second spring;
the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the utility model clearly indicates otherwise, and it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The displacement of the closed variable pump is increased along with the increase of the pilot pressure, and the maximum absorption power of the closed variable pump is also increased along with the increase of the displacement of the closed variable pump.
The utility model provides a controller feedback cylinder which adopts a double-spring structure and is applied to a closed pump controller to increase the closed pump power control function. Under the condition of a certain pilot pressure, the displacement and the high pressure show a proportional relation, and the broken line is a typical characteristic of the pump due to the staged action of the two high pressure springs. Under the condition of changing the pilot pressure, the maximum absorption torque of the pump is different due to different pilot pressures, and the method can be widely applied to the working conditions of different rotational speeds and different torques of the engine.
As shown in fig. 1, in one embodiment of the present utility model, a controller feedback cylinder is provided, including: a housing in which a bushing 5, a spring seat 7 and a piston rod 8 are arranged; the bushing 5 is fixedly arranged at the right end of the shell, the piston rod 8 penetrates through the bushing 5 and can extend out of the shell, and the spring seat 7 is sleeved at one end of the piston rod 8, which is far away from the bushing 5; the outer wall of the spring seat 7 is provided with a flange, the inner wall of the spring seat is provided with a spring cavity, a first spring 9 is arranged between the flange of the spring seat 7 and the shell, a second spring 10 is sleeved outside the bushing 5, and the second spring 10 in an initial state is provided with a set distance with the inner end face of the spring cavity.
As shown in fig. 1, the first spring 9 is always in a compressed state, and the left end of the second spring 10 has a certain clearance, so that only the first spring 9 generates a force in the front section of the piston rod 8 which moves rightward, and when the left end of the second spring 10 contacts the spring seat 7, the first spring 9 and the second spring 10 jointly generate a force, so that the high pressure force and the extension amount of the piston are in a fold line shape, as shown in fig. 3.
According to the utility model, high-pressure oil of the closed variable pump is fed back to the pilot valve rod 03, and a feedback cylinder 01 and a parallel double-spring structure are adopted, so that the displacement change of the closed variable pump is not only related to pilot pressure, but also related to working pressure of the closed variable pump.
When the pilot pressure is fixed, the displacement of the pilot pressure is inversely proportional to the extension length of the piston rod 8 of the feedback cylinder along with the increase of the working pressure of the closed variable pump, namely: the higher the working pressure of the closed variable pump is, the longer the extension length of the piston rod 8 of the feedback cylinder is, the smaller the displacement of the closed variable pump is, the change of the displacement and the working pressure accords with the fold line change of the parallel double springs, and the constant torque can be well fitted by utilizing the double fold line to fit a constant power curve, so that the closed variable pump can be suitable for various working conditions with constant torque requirements.
As shown in fig. 1, the housing comprises a valve sleeve 4 and a plug 1, the valve sleeve 4 and the plug 1 are detachably connected, an oil cavity is defined by the valve sleeve 4, the plug 1 and a bushing 5, and the piston rod 8, the spring seat 7, the first spring 9 and the second spring 10 are positioned in the oil cavity. Specifically, the valve sleeve 4 is in threaded connection with the plug 1, an oil hole is formed in the plug 1, the oil hole is communicated with the oil cavity, and threads connected with the controller body 02 are formed in the outer wall of one end, away from the plug 1, of the valve sleeve 4. As shown in fig. 2, during assembly, a feedback cylinder 01 is respectively installed at the left end and the right end of the controller body 02, and is connected through threads, and a sealing ring is installed at the joint to prevent oil leakage.
The oil cavity is internally provided with a valve core 3, the valve core 3 is positioned between the plug 1 and the piston rod 8, one end of the valve core 3, which faces the plug 1, is provided with a boss, the right end face of the valve core 3 is abutted with the left end face of the spring seat 7 under the action of the first spring 9, and the spring seat 7 moves along with the valve core 3 when the valve core moves.
The piston rod 8 is provided with three circular truncated cones, namely a clamping section, a middle section and a sliding section from left to right, and the diameters of the clamping section, the middle section and the sliding section are reduced in sequence. The right end of the valve core 3 is provided with a clamping groove, the clamping section of the piston rod 8 is installed in the clamping groove of the valve core 3, and the sliding section penetrates through the bushing 5 and can extend out of the shell to be abutted against the pilot valve rod 03, as shown in fig. 2.
One end of the valve sleeve 4, which is far away from the plug 1, is provided with a clamping ring, the bushing 5 is arranged in the clamping ring, and the right end of the first spring 9 abuts against the left end face of the clamping ring. The left end of the valve sleeve 4 is provided with a shaft body, the right end of the second spring 10 is sleeved on the shaft body, and the left end of the second spring is sleeved on the middle section of the piston rod 8. The distance from the right end face of the clamping ring to the left end face of the flange of the spring seat 7 is smaller than the length of the first spring 9 in the initial state, the distance from the shaft shoulder of the shaft body to the inner end face of the spring cavity is larger than the length of the second spring 10 in the initial state, so that only the first spring 9 generates acting force in the first stage of rightward movement of the valve core 3, and the first spring 9 and the second spring 10 generate acting force together in the second stage of continued rightward movement.
Further, a first washer 2 is arranged between the first spring 9 and the end face of the clamping ring, a second washer 6 is arranged between the second spring 10 and the shaft shoulder of the shaft body, and the acting force of the first spring 9 and the second spring 10 is conveniently adjusted by adjusting the number or the thickness of the first washer 2 and the second washer 6 so as to adapt to various different working conditions.
Action process of feedback cylinder 01:
the plug 1 of the feedback cylinder 01 is connected with a high-pressure oil source, the valve core 3 of the feedback cylinder 01 pushes the piston rod 8 to move under the action of pressure, when the pressure is low and the piston rod 8 does not extend, the pump is in maximum displacement, the extending amount of the piston rod 8 gradually increases along with the continuous rising of the pressure, and as the pilot valve rod 03 and the piston rod 8 adopt a butt mode, the extending amount of the piston rod 8 increases, so that the displacement of the pilot valve rod 03 relative to a zero point (in a non-working state) is reduced, that is to say, the displacement of the closed variable piston pump is reduced, and the change rule is a fold line, so that the purpose of constant power is realized by double fold lines. The utility model can adapt the closed variable pump to the power absorption at different engine speeds by adjusting the pilot pressure, fully absorb the engine power, improve the working efficiency and save the energy.
The pump output pressure is related to the displacement, and a parallel double-spring structure is adopted for the correlation. The feedback cylinder 01 adopts a double-spring structure, so that the high-pressure and the extension amount of the piston rod 8 are in a fold line shape, the feedback cylinder 01 is applied to a closed pump, the extension amount of the piston rod 8 is in inverse proportion to the displacement, namely, the piston rod 8 is used for limiting the displacement of the pump, when the pressure is low, the piston rod 8 is not extended, the pump is in maximum displacement, the extension amount of the piston rod 8 is gradually increased along with the continuous rising of the pressure, the displacement of the pump is gradually reduced, the change rule is a fold line, the purpose of constant power is realized by double fold lines, the constant torque can be well fitted, and therefore, the feedback cylinder 01 can be applied to working conditions with requirements for the constant torque.
Based on the controller feedback cylinder 01, the embodiment of the present utility model further provides a closed pump power controller, in which the controller feedback cylinder 01 described in the above embodiment is disposed, and the technical effects of the closed pump power controller adopting the controller feedback cylinder 01 refer to the above embodiment because the controller feedback cylinder 01 has the technical effects described above.
While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.
Claims (10)
1. A controller feedback cylinder, comprising: the shell is internally provided with a bushing, a spring seat and a piston rod;
the bushing is fixedly arranged at one end of the shell, the piston rod penetrates through the bushing and can extend out of the shell, and the spring seat is sleeved at one end, far away from the bushing, of the piston rod;
the spring seat outer wall is provided with the flange, and the inner wall is provided with the spring chamber, the spring seat flange with be provided with first spring between the casing, the bush has cup jointed the second spring outward, and initial state's second spring with the interior terminal surface in spring chamber has the distance of setting.
2. The controller feedback cylinder of claim 1 wherein the housing comprises a valve sleeve and a plug, the valve sleeve and plug being removably connected, the valve sleeve, plug and bushing enclosing an oil chamber, the piston rod, spring seat, first spring and second spring being located within the oil chamber.
3. The controller feedback cylinder as set forth in claim 2, wherein the valve sleeve is screwed with the screw plug, an oil hole is provided in the screw plug, the oil hole communicates with the oil chamber, and a screw thread connected with the controller body is provided on an outer wall of an end of the valve sleeve remote from the screw plug.
4. The controller feedback cylinder as set forth in claim 2, wherein a valve spool is further provided in the oil chamber, the valve spool being located between the plug and the piston rod, a boss being provided at one end of the valve spool toward the plug, the other end of the valve spool abutting against the spring seat.
5. The controller feedback cylinder of claim 4 wherein the piston rod is provided with a clamping section, a middle section and a sliding section in sequence, the end of the valve core, which is away from the plug, is provided with a clamping groove, the clamping section of the piston rod is arranged in the clamping groove of the valve core, and the sliding section penetrates through the bushing and can extend out of the shell.
6. The controller feedback cylinder of claim 5 wherein an end of the valve sleeve remote from the plug is provided with a snap ring, the bushing is mounted within the snap ring, and the first spring has an end abutting an end face of the snap ring.
7. The controller feedback cylinder of claim 6 wherein an end of the valve sleeve remote from the collar has a shaft, the second spring having a first end sleeved on the shaft and a second end sleeved on the intermediate section of the piston rod.
8. The controller feedback cylinder as recited in claim 7 wherein the distance from the end surface of the snap ring to the end surface of the spring seat flange is less than the length of the first spring in the initial state and the distance from the shoulder of the shaft to the end surface of the spring cavity is greater than the length of the second spring in the initial state.
9. The controller feedback cylinder of claim 7 wherein a first washer is disposed between the first spring and an end face of the snap ring and a second washer is disposed between the second spring and a shoulder of the shaft.
10. A closed pump power controller, characterized in that a controller feedback cylinder as claimed in any one of claims 1-9 is provided at each end of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321941568.4U CN220354183U (en) | 2023-07-21 | 2023-07-21 | Controller feedback cylinder and closed pump power controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321941568.4U CN220354183U (en) | 2023-07-21 | 2023-07-21 | Controller feedback cylinder and closed pump power controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220354183U true CN220354183U (en) | 2024-01-16 |
Family
ID=89480116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321941568.4U Active CN220354183U (en) | 2023-07-21 | 2023-07-21 | Controller feedback cylinder and closed pump power controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220354183U (en) |
-
2023
- 2023-07-21 CN CN202321941568.4U patent/CN220354183U/en active Active
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| GR01 | Patent grant |