CN202659881U - Proportional pressure valve - Google Patents
Proportional pressure valve Download PDFInfo
- Publication number
- CN202659881U CN202659881U CN 201220189526 CN201220189526U CN202659881U CN 202659881 U CN202659881 U CN 202659881U CN 201220189526 CN201220189526 CN 201220189526 CN 201220189526 U CN201220189526 U CN 201220189526U CN 202659881 U CN202659881 U CN 202659881U
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- pressure
- valve
- valve rod
- plunger
- torque converter
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Abstract
A proportional pressure valve belongs to the technical field of valves. The technical scheme is that the proportional pressure valve structurally comprises a variable speed valve body, a valve rod, a restoring spring and a plunger; holes respectively communicated with a torque converter inlet oil way, a torque converter oil inlet overflow way and a variable speed valve pressure regulating way are arranged from left to right on the wall of the variable speed valve body; a locating block is arranged at the right end; the valve rod is arranged inside the variable speed valve body; the plunger is coaxially sheathed at the right end; the right end of the plunger resists against the locating block; the left end is arranged inside the valve rod in a sliding manner; the valve rod and the plunger tightly form a pressure induction cavity; the pressure induction cavity is communicated with the variable speed valve pressure regulating way by virtue of an induction oil hole on the wall of the cavity; the left end of the resetting spring is sheathed on the valve rod, and the right end resists against the locating block. The oil inlet pressure of a hydraulic torque converter and the regulating pressure of a speed control system can form a certain proportional relation; the situation that the oil supply pressure of the hydraulic torque converter changes according to work requirement is ensured, and the proportional pressure valve plays a protection role on spare parts inside the torque converter under a special condition.
Description
Technical field
The utility model relates to a kind of inlet pressure control valve of fluid torque converter, is used for engineering machinery power gear shifting mechanism, belongs to the valve technology field.
Background technique
At present, in engineering machinery power gear shifting mechanism, that be used for control torque-converters imported oil hydraulic coupling is direct-acting overflow valve (referring to Fig. 1).Direct-acting overflow valve is comprised of valve body 3, spool 4, spring 5 etc., and valve body 3 is installed in the speed change valve body 1, and spool 4 is under the active force of spring 5, and the left end conical surface contacts with valve body 3 inner conical surfaces, forms valve port.The left end of relief valve is connected with torque-converters import oil duct 15, and the hole on the valve body 3 middle part sidewalls is connected with torque-converters oil-feed overflow oil duct 16.When the oil liquid pressure that enters fluid torque converter reached the cracking pressure of relief valve setting, relief valve was opened, and except the fluid for the torque-converters normal operation, unnecessary fluid is discharged by this relief valve.Direct-acting overflow valve is multiplex in stability of flow, and required force value changes in the little hydraulic system relatively.And the changes in flow rate scope of the fluid torque converter fluid that uses in the engineering machinery is large, use direct-acting overflow valve control torque-converters imported oil hydraulic coupling to exist following problem: fuel supply flow rate hour relief valve does not reach cracking pressure and does not work, only has the flow that surpasses the torque-converters need of work when flow, relief valve is opened, unnecessary fluid for the fluid power torque-converters is discharged from relief valve, the oil liquid pressure that enter torque-converters this moment is higher, the damage parts that easily causes the inner cast aluminium of torque-converters to be made.If by reducing spacer torque-converters import relief valve cracking pressure is reduced, the fluid that enters torque-converters is discharged from the import relief valve ahead of time, the fluid that can cause so again entering fluid torque converter reduces, and the torque-converters working efficiency descends, and produces the problems such as high temperature heating after work a period of time.Therefore, be necessary very much prior art is improved.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provides a kind of fluid torque converter imported oil hydraulic coupling that can guarantee to change by its need of work, and the proportional pressure valve that under specific condition the torque-converters inner body is played a protective role.
The alleged problem of the utility model realizes with following technical proposals:
A kind of proportional pressure valve, comprise speed change valve body, valve rod, Returnning spring, plunger in the formation, be provided with from left to right the hole that is connected with torque-converters import oil duct, torque-converters oil-feed overflow oil duct, speed change valve pressure regulation pressure oil duct respectively on the described speed change valve body wall, its right-hand member is provided with positioning block, described valve rod places in the speed change valve body, and its right-hand member coaxial sleeve is equipped with plunger; The right-hand member of described plunger leans on positioning block, and the left end cunning places in the valve rod, plunger and valve stem seal mineralization pressure induction cavity, and condensation of water vapor is connected with speed change valve pressure regulation pressure oil duct by the induction oilhole on its chamber wall; The left end of described Returnning spring is placed on the valve rod, and its right-hand member leans on positioning block.
The aforementioned proportion pressure valve, the left end of described valve rod has backing pin.
During the utility model work, just started or speed-change and gearshift moment at complete machine, because this moment, speed variator system pressure was very low, fluid torque converter work fluid import oil pressure relief is also lower, torque-converters except the normal operation required fluid, unnecessary oily passing ratio pressure valve overflow.During the cold-starting torque-converters, oil viscosity is very large, and all quick overflows of energy passing ratio pressure valve of unnecessary fluid so that the torque-converters resistance of start reduces, have been played the safety protection effect to pump impeller.Gradually rising along with speed variator system pressure, fluid torque converter oil-feed oil pressure relief also raises gradually, guaranteed that torque-converters is can both fuel feeding under any operating mode sufficient, the appearance of the problems such as the torque converter reduction of effectively having avoided causing because of low on fuel, heating.
Description of drawings
The utility model is described in further detail below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of prior art;
Fig. 2 is structural representation of the present utility model.
Each label is among the figure: 1, speed change valve body; 2, top cover; 3, valve body; 4, spool; 5, spring; 6, spring seat; 7, adjust pad; 8, Steel Cable Baffle Ring; 9, positioning block; 10, locating stud; 11, backing pin; 12, valve rod; 13, Returnning spring; 14, plunger; 15, torque-converters import oil duct; 16, torque-converters oil-feed overflow oil duct 17, speed change valve pressure regulation pressure oil duct; 18, induction oilhole; 19, condensation of water vapor.
Embodiment
Referring to Fig. 2, the utility model is used for the pressure of control fluid torque converter import fluid, mainly is comprised of speed change valve body 1, valve rod 12, Returnning spring 13 and plunger 14.
Referring to Fig. 1 and Fig. 2, the technical solution of the utility model is with the valve body 3 of valve rod 12, Returnning spring 13, plunger 14 replacement original structures, spool 4, spring 5, spring seat 6, adjusts the parts such as pad 7, Steel Cable Baffle Ring 8.During installation, in the identical hole of speed change valve body 1, the valve rod 12 of packing into, left end limits its position by backing pin 11, and right-hand member is installed Returnning spring 13, and Returnning spring withstands on the end face of positioning block 9, and positioning block 9 is fixed on the right side of speed change valve body wall by locating stud 10.Plunger 14 is installed in the blind hole of valve rod 12 right-hand members.Returnning spring 13 rigidity are very little, mainly play reset response, produce a thrust left at valve rod 12 right-hand members after it is compressed, guarantee that valve rod is in the mounting point all the time when not working.
The left end of valve rod 12 communicates with fluid torque converter filler opening oil duct, and the induction cavity 19 of valve rod 12 inside is connected with pressure regulation pressure oil duct 17 on the speed change valve valve body 1 by induction oilhole 18.During fluid torque converter work, enter pressure-acting that the fluid of torque-converters produces on the left side of valve rod 12, valve rod 12 is produced a thrust to the right, the pressure oil liquid of speed variator system enters condensation of water vapor 19 by speed change valve pressure regulation pressure oil duct 17, induction oilhole 18, this pressure-acting is on the left surface of condensation of water vapor 19, valve rod 12 is produced a thrust left, act on two ends, valve rod 12 left and right sides thrust so that valve rod pause in a certain equilibrium position.Suppose that fluid torque converter import oil pressure relief is P, changing speed and regulating pressure pressure is Q, valve rod 12 left end areas are A, the area of plunger 14 is B, the thrust left that 13 pairs of valve rods of Returnning spring 12 produce is kx, PA=QB+kx when being in certain equilibrium position, valve rod 12 is arranged, draw fluid torque converter import oil pressure relief P=(QB+kx)/A, because the kx value is very little, kx/A can be ignored, obtain equation P=QB/A, wherein B/A is constant (this constant can be selected as required), so fluid torque converter import oil pressure relief P and changing speed and regulating pressure pressure Q are proportional.
The utility model has just started or Powershift transmission gear shift moment at complete machine, because this moment, speed variator system pressure was very low, fluid torque converter work fluid import oil pressure relief is also lower, torque-converters except the normal operation required fluid, unnecessary oily passing ratio pressure valve overflow.During the cold-starting torque-converters, oil viscosity is very large, and all quick overflows of energy passing ratio pressure valve of unnecessary fluid so that the torque-converters resistance of start reduces, have been played the safety protection effect to pump impeller; Along with the gradually rising of speed variator system pressure, fluid torque converter oil-feed oil pressure relief also raises gradually, has guaranteed that torque-converters is can fuel feeding sufficient, the appearance of the problems such as the torque converter reduction that prevents from causing owing to low on fuel, heating.
Claims (2)
1. proportional pressure valve, it is characterized in that, comprise speed change valve body (1), valve rod (12), Returnning spring (13), plunger (14) in the formation, be provided with from left to right the hole that is connected with torque-converters import oil duct (15), torque-converters oil-feed overflow oil duct (16), speed change valve pressure regulation pressure oil duct (17) respectively on described speed change valve body (1) wall, its right-hand member is provided with positioning block (9), described valve rod (12) places in the speed change valve body (1), and its right-hand member coaxial sleeve is equipped with plunger (14); The right-hand member of described plunger (14) leans on positioning block (9), the left end cunning places in the valve rod (12), plunger (14) and valve rod (12) sealing mineralization pressure induction cavity (19), condensation of water vapor (19) is connected with speed change valve pressure regulation pressure oil duct (17) by the induction oilhole (18) on its chamber wall; The left end of described Returnning spring (13) is placed on the valve rod (12), and its right-hand member leans on (9) piece of location.
2. described proportional pressure valve according to claim 1 is characterized in that, the left end of described valve rod (12) has backing pin (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220189526 CN202659881U (en) | 2012-04-28 | 2012-04-28 | Proportional pressure valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220189526 CN202659881U (en) | 2012-04-28 | 2012-04-28 | Proportional pressure valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202659881U true CN202659881U (en) | 2013-01-09 |
Family
ID=47454790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220189526 Expired - Fee Related CN202659881U (en) | 2012-04-28 | 2012-04-28 | Proportional pressure valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202659881U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023409A (en) * | 2015-07-30 | 2017-08-08 | 马红刚 | A kind of diesel engine fuel oil changes automatic dispenser |
-
2012
- 2012-04-28 CN CN 201220189526 patent/CN202659881U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107023409A (en) * | 2015-07-30 | 2017-08-08 | 马红刚 | A kind of diesel engine fuel oil changes automatic dispenser |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130109 Termination date: 20170428 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |