CN102235394B - Integrated valve with oil circuit selection function for controlling hydraulic motor brake - Google Patents
Integrated valve with oil circuit selection function for controlling hydraulic motor brake Download PDFInfo
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- CN102235394B CN102235394B CN 201110232263 CN201110232263A CN102235394B CN 102235394 B CN102235394 B CN 102235394B CN 201110232263 CN201110232263 CN 201110232263 CN 201110232263 A CN201110232263 A CN 201110232263A CN 102235394 B CN102235394 B CN 102235394B
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Abstract
The invention discloses an integrated valve with an oil circuit selection function for controlling a hydraulic motor brake. The integrated valve comprises a valve body, wherein a main hydraulic cavity is formed in the valve body, and is horizontally and symmetrically connected with a first valve cavity and a second valve cavity; a first check valve component and a second check valve component which are uniaxially opened towards the main hydraulic cavity are arranged in the first valve cavity and the second valve cavity respectively; the lower end of the main hydraulic cavity is connected witha third valve cavity; a throttle valve component is arranged in the third valve cavity; and hydraulic oil which flows into the first check valve component and hydraulic oil which flows into the second check valve component are self-selected on the basis of pressure, so that the hydraulic oil in a higher circuit flows into the main hydraulic cavity, and then the throttle valve component is driven to act. The integrated valve has a compact structure, is convenient to use, can conveniently adjust delay time as required, and has the function of selecting two paths of control oil, so that the control oil and working oil can be controlled asynchronously, the condition that the brake can be released and stopped at the right time is ensured, and the service life of the brake is prolonged.
Description
Technical field
The present invention relates to engineering machinery, technical field of hydraulic, a kind of integrated valve with automatic selection function particularly, specifically a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control.
Background technique
In the prior art, most of engineering machinery at hydraulic actuator, all dispose Parking Brake as rotary motor and running motor in order to consider its Security at present.Parking Brake generally is built in the oil hydraulic motor, braking force by spring apply, hydraulic pressure discharges.But because control oil and work oil can not be realized the control of difference step, thereby cause brake wear serious, greatly reduce its working life, and bring potential safety hazard for whole main frame.Therefore how working life of controlling to improve break by oil circuit solves the common problem that domestic a lot of main frame producer exists, and is our task of top priority.
Summary of the invention
Technical problem to be solved by this invention is at above-mentioned prior art present situation, has free function and provide, can make control oil and work oil realize the control of difference step, guarantee that break can discharge and cut out in suitable time, improve break working life, a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control of guaranteeing Host Security.
The present invention solves the problems of the technologies described above the technological scheme that adopts: a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control, comprise valve body, be shaped on main hydraulic pressure cavity in the valve body, main hydraulic pressure cavity lateral symmetry is connected with first valve pocket and second valve pocket, be separately installed with first check valve assembly and second check valve assembly towards the unidirectional unlatching of main hydraulic pressure cavity in first valve pocket and second valve pocket, and main hydraulic pressure cavity lower end is connected with the 3rd valve pocket, the throttle valve assembly is installed in the 3rd valve pocket, the hydraulic oil that enters the hydraulic oil of first check valve assembly and enter second check valve assembly relies on pressure free, makes higher one tunnel hydraulic oil enter main hydraulic pressure cavity and then promote the action of throttle valve assembly.
For optimizing technique scheme, the measure of taking also comprises:
Above-mentioned valve body is shaped on first control port and the 4th control port that connects first check valve assembly, and second control port and the 5th control port that connect second check valve assembly, the valve body upper end is shaped on the 3rd oilhole that is communicated with main hydraulic pressure cavity, the 3rd valve pocket lower end is connected with drain tap, and the 3rd valve pocket cross connection is useful on the connecting passage mouth that connects break control oil circuit.
The first above-mentioned check valve assembly comprises first valve seat, first valve ball and first ball seat; First ball seat and first valve seat all are shaped on the arc-shaped concave that cooperates with the first valve ball liquid sealing; First ball seat is shaped on first axial bore that is connected with first radial hole, first axial bore, one end connects main hydraulic pressure cavity, the other end matches with first valve ball through the arc-shaped concave of first ball seat, first valve seat is shaped on first oil inlet hole that is communicated with first control port and the 4th control port, and the other end of first oil inlet hole matches with first valve ball through the arc-shaped concave of first valve seat.
The second above-mentioned check valve assembly comprises second valve seat, second valve ball and second ball seat; Second ball seat and second valve seat all are shaped on the arc-shaped concave that cooperates with the second valve ball liquid sealing; Second ball seat is shaped on second axial bore that is connected with second radial hole, second axial bore, one end connects main hydraulic pressure cavity, the other end matches with second valve ball through the arc-shaped concave of second ball seat, described second valve seat is shaped on second oil inlet hole that is communicated with second control port and the 5th control port, and the other end of second oil inlet hole matches with second valve ball through the arc-shaped concave of second valve seat.
Be shaped on first annular groove in the first above-mentioned valve pocket, first annular groove is installed with the first hole back-up ring, and first check valve assembly fixedly is fitted in first valve pocket with back-up ring through first hole; Be shaped on second annular groove in second valve pocket, second annular groove is installed with the second hole back-up ring, and second check valve assembly fixedly is fitted in second valve pocket with back-up ring through second hole.
Above-mentioned throttle valve assembly comprises spool, Returnning spring and valve seat; Spool is shaped on the valve rod of valve head and two-section type, the lower end cover of valve rod fits in the seat chamber of valve seat, and the valve rod rear surface axially is shaped on the second damping annular flat oral pore, the length of the second damping annular flat oral pore is less than the degree of depth in valve seat block chamber, Returnning spring is sleeved on the valve rod, the two ends of Returnning spring respectively with valve head and valve seat phase roof pressure, valve head is shaped on first damping hole.
Above-mentioned valve seat is set with rubber seal, and matches with the inner circle wall liquid sealing of the 3rd valve pocket through rubber seal, and valve seat is shaped on the through hole that is communicated with drain tap and valve seat block chamber, and the connecting passage mouth is connected with the residing cavity of Returnning spring.
The annular flat oral pore of the first above-mentioned damping hole for axially being shaped on the valve head surface.
The first above-mentioned damping hole is the axial damping through holes of the twice of upper and lower symmetry.
The 3rd above-mentioned valve pocket is shaped on the 3rd annular groove, and the 3rd annular groove is installed with the 3rd hole back-up ring, and the throttle valve assembly is fixedly mounted in the 3rd valve pocket with back-up ring through the 3rd hole.
Compared with prior art, valve body master hydraulic pressure cavity of the present invention is symmetrically connected with first valve pocket and second valve pocket, and first valve pocket and second valve pocket be fitted with first check valve assembly and second check valve assembly towards the unidirectional unlatching of main hydraulic pressure cavity respectively, main hydraulic pressure cavity can be accepted the effect of two-way control oil simultaneously, by the automatic selection pressure of oil pressure pressure of first check valve assembly and second check valve assembly higher a road, has the function that two-way control grease separation is selected, make control hydraulic oil and work oil realize the control of difference step, guarantee that break can discharge and cut out in suitable time, thereby improve break working life.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention;
Fig. 2 is the structural representation of valve body among Fig. 1;
Fig. 3 is the structural representation of first check valve assembly among Fig. 1;
Fig. 4 is the structural representation of second check valve assembly among Fig. 1;
Fig. 5 is the assembly structure schematic representation of throttle valve assembly among Fig. 1;
Fig. 6 is one of structural representation of spool among Fig. 5;
Fig. 7 is the left view of Fig. 6;
Fig. 8 is that the A-A of Fig. 7 is to sectional drawing;
Fig. 9 be spool among Fig. 5 structural representation two;
Figure 10 is the left view of Fig. 9;
Figure 11 is that the B-B of Fig. 9 is to sectional drawing;
Figure 12 is the structural representation of valve seat among Fig. 5;
Figure 13 is hydraulic work schematic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiments of the invention are described in further detail.
Fig. 1 is to Figure 13 shows that structural representation of the present invention.
Reference character wherein is: valve body 1, main hydraulic pressure cavity 1a, the first valve pocket 1b, the second valve pocket 1c, the 3rd valve pocket 1d, first control port 11, second control port 12, the 3rd oilhole 13, the 4th control port 14, the 5th control port 15, first check valve assembly 2, first valve seat 21, the first oil inlet hole 21a, first valve ball 22, first ball seat 23, the first radial hole 23a, the first axial bore 23b, second check valve assembly 3, second valve seat 31, the second oil inlet hole 31a, second valve ball 32, second ball seat 33, the second radial hole 33a, the second axial bore 33b, throttle valve assembly 4, spool 41, valve head 411, the first damping hole 411a, valve rod 412, the second damping annular flat oral pore 412a, Returnning spring 42, valve seat 43, seat chamber 43a, through hole 43b, first hole back-up ring 51, second hole back-up ring 52, the 3rd hole back-up ring 53, rubber seal 6, drain tap T, connecting passage mouth A.
As shown in figure 1 to figure 13, a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control of the present invention, comprise valve body 1, be shaped on main hydraulic pressure cavity 1a in the valve body 1, main hydraulic pressure cavity 1a lateral symmetry is connected with the first valve pocket 1b and the second valve pocket 1c, be separately installed with first check valve assembly 2 and second check valve assembly 3 towards the unidirectional unlatching of main hydraulic pressure cavity 1a among the first valve pocket 1b and the second valve pocket 1c, and main hydraulic pressure cavity 1a lower end is connected with the 3rd valve pocket 1d, among the 3rd valve pocket 1d throttle valve assembly 4 is installed, the hydraulic oil that enters the hydraulic oil of first check valve assembly 2 and enter second check valve assembly 3 relies on pressure free, makes higher one tunnel hydraulic oil enter main hydraulic pressure cavity 1a and then promote 4 actions of throttle valve assembly.The present invention is by the equipped check valve assembly of symmetry, utilize hydraulic principle, the automatic selection of the control hydraulic oil oil-feed that realization is not gone the same way, throttling action by throttle valve assembly 4, control break unlatching or close, thereby making in the host hydraulic system control oil and work oil can realize that difference goes on foot controls, can reduce the wearing and tearing of break greatly, improve its working life, the advantage of this integrated valve is: structure is bolted and gathers, easy to use, wide application, can also adjust the retard time of control easily by adjusting throttle valve assembly 4, and can accept the effect of different two-way control oil simultaneously, and have selection function, can guarantee that break discharged and cuts out in the suitable time.
As shown in Figure 1 and Figure 2, valve body 1 of the present invention is shaped on first control port 11 and the 4th control port 14 that connects first check valve assembly 2, and second control port 12 and the 5th control port 15 that connect second check valve assembly 3, valve body 1 upper end is shaped on the 3rd oilhole 13 that is communicated with main hydraulic pressure cavity 1a, the 3rd valve pocket 1c lower end is connected with drain tap T, and the 3rd valve pocket 1c cross connection is useful on the connecting passage mouth A that connects break control oil circuit.Drain tap T connects the total road of oil return or fuel tank, and connecting passage mouth A is connected with the control port of break, and the 3rd oilhole 13 is equipped with plug, and plug is pressed with seal ring, and each control oilhole all its corresponding control oil circuit is connected.
As shown in Figure 3, first check valve assembly 2 comprises first valve seat 21, first valve ball 22 and first ball seat 23; First ball seat 23 and first valve seat 21 all are shaped on the arc-shaped concave that cooperates with first valve ball, 22 liquid sealings; First ball seat 23 is shaped on the first axial bore 23b that is connected with the first radial hole 23a, the first axial bore 23b, one end connects main hydraulic pressure cavity 1a, the other end matches with first valve ball 22 through the arc-shaped concave of first ball seat 23, first valve seat 21 is shaped on the first oil inlet hole 21a that is communicated with first control port 11 and the 4th control port 14, and the other end of the first oil inlet hole 21a matches with first valve ball 22 through the arc-shaped concave of first valve seat 21.When the oil pressure of the first oil inlet hole 21a is higher than the oil pressure of the main hydraulic pressure cavity 1a that the first axial bore 23b is communicated with, first valve ball 22 is pushed to the arc-shaped concave of first ball seat 23, seal up the first axial bore 23b left port by arc-shaped concave, pressure oil among the first oil inlet hole 21a is through side face and the first radial hole 23a of first valve ball 22, the first axial bore 23b enters main hydraulic pressure cavity 1a, when the hydraulic oil among the main hydraulic pressure cavity 1a is higher than the oil pressure at the first oil inlet hole 21a place, high pressure oil among the main hydraulic pressure cavity 1a promotes first valve ball 22 through the first axial bore 23b and moves to left to match with the arc-shaped concave of first valve seat 21 and seal the first oil inlet hole 21a, thereby realizes the one-way flow of control oil.
As shown in Figure 4, second check valve assembly 3 comprises second valve seat 31, second valve ball 32 and second ball seat 33; Second ball seat 33 and second valve seat 31 all are shaped on the arc-shaped concave that cooperates with second valve ball, 32 liquid sealings; Second ball seat 33 is shaped on the second axial bore 33b that is connected with the second radial hole 33a, the second axial bore 33b, one end connects main hydraulic pressure cavity 1a, the other end matches with second valve ball 32 through the arc-shaped concave of second ball seat 33, second valve seat 31 is shaped on the second oil inlet hole 31a that is communicated with second control port 12 and the 5th control port 15, and the other end of the second oil inlet hole 31a matches with second valve ball 32 through the arc-shaped concave of second valve seat 31.The working principle of second check valve assembly 3 is identical with the working principle of first check valve assembly 2.
As shown in Figure 1, be shaped on first annular groove among the first valve pocket 1b, first annular groove is installed with first hole and fixedly is fitted in first valve pocket 1b through first hole with back-up ring 51 with back-up ring 51, the first check valve assemblies 2; Be shaped on second annular groove among the second valve pocket 1c, second annular groove is installed with second hole and fixedly is fitted among the second valve pocket 1c with back-up ring 52 through second hole with back-up ring 52, the second check valve assemblies 3.Adopt the hole fixing equipped, simple in structure with back-up ring, easy for installation and low cost of manufacture.
As shown in Figure 5, throttle valve assembly 4 comprises spool 41, Returnning spring 42 and valve seat 43; Spool 41 is shaped on the valve rod 412 of valve head 411 and two-section type, the lower end cover of valve rod 412 fits among the seat chamber 43a of valve seat 43, and valve rod 412 rear surfaces axially are shaped on the second damping annular flat oral pore 412a, the length of the second damping annular flat oral pore 412a is less than the degree of depth of valve seat block chamber 43a, Returnning spring 42 is sleeved on the valve rod 412, the two ends of Returnning spring 42 respectively with valve head 411 and valve seat 43 phase roof pressures, valve head 411 is shaped on the first damping hole 411a.
The first damping hole 411a of the present invention has two kinds of best structures of implementing, among the embodiment, to the structural drawing that Figure 8 shows that first kind of first damping hole 411a of the present invention, the first damping hole 411a adopts the method that axially is shaped on the annular flat oral pore on the surface of valve head 411 as Fig. 6.
As Fig. 9 to the structural drawing that Figure 11 shows that second kind of first damping hole 411a of the present invention, among the figure as can be seen the first damping hole 411a be the axial damping through hole of twice of the upper and lower symmetry that is shaped at valve head 411.
As shown in figure 12, valve seat 43 of the present invention is set with rubber seal 6, and match through the inner circle wall liquid sealing of rubber seal 6 with the 3rd valve pocket 1d, valve seat 43 is shaped on the through hole 43b that is communicated with drain tap T and valve seat block chamber 43a, and connecting passage mouth A is connected with Returnning spring 42 residing cavitys.
Among the embodiment, the 3rd valve pocket 1d is shaped on the 3rd annular groove, and the 3rd annular groove is installed with the 3rd hole back-up ring 53, and throttle valve assembly 4 is fixedly mounted among the 3rd valve pocket 1d with back-up ring 53 through the 3rd hole.
Working principle of the present invention is as follows:
As shown in figure 13, when one road pressure oil enters first control port 11 and the 4th control port 14, when having other one road pressure oil to enter second control port 12 and the 5th control port 15 simultaneously, under the effect of first check valve assembly 2 and 3 two one-way valves of second check valve assembly, the realization oil circuit is selected, and allows the high fluid of pressure enter main hydraulic pressure cavity 1a; Hydraulic oil acts on the upper end of throttle valve assembly 4 spools 41, overcome the active force of Returnning spring 42, promoting throttling valve core 41 moves down, connecting passage mouth A and drain tap T partition are come, hydraulic oil enters into connecting passage mouth A by the first damping hole 411a on the throttling valve core 41, the control mouth of A mouth and break is connected, thereby realizes the quick release of break.At this moment, the first damping hole 411a on the throttling valve core 41 plays the reduction compression shock, the effect of protection break.When first control port 11, the 4th control port 14, when second control port 12 and the 5th control port 15 all do not have pressure oil, hydraulic oil among the main hydraulic pressure cavity 1a is under the effect of first check valve assembly 2 and 3 two one-way valves of second check valve assembly, with first control port 11, the 4th control port 14, second control port 12 and the 5th control port 15 cut off, this chamber hydraulic oil can only enter connecting passage mouth A lentamente by the first damping hole 411a on the throttling valve core, this moment, throttling valve core 41 was under the promotion of Returnning spring 42 elastic force, need overcome the counterpressure of main hydraulic pressure cavity 1a hydraulic oil, throttling valve core 41 is moved on slowly, the seat chamber 43a of the lower end of the valve rod 412 of throttling valve core and valve seat 43 slowly breaks away from simultaneously, the second damping annular flat oral pore 412a and seat chamber 43a form damping function, along with throttling valve core 41 slowly on move, damping function progressively weakens, the control oil of break is by connecting passage mouth A, get back to drain tap T through the second damping annular flat oral pore 412a again, thereby realize the effect of connecting passage mouth A hydraulic oil step-down.Because in this process, the hydraulic oil of main hydraulic pressure cavity 1a, the first damping hole 411a and the second damping annular flat oral pore 412a have hindered the oil return of break control oil, therefore just can realize the effect of the late release of break.
Great advantage of the present invention is: structure is bolted and gathers, easy to use, wide application, can make things convenient for as required and adjust retard time, and can accept different two-way control oil effects simultaneously, has selection function.
The technique effect of its generation is: two-way control oil is had selection function, make control oil and work oil realize the control of difference step, guarantee that break can discharge and cut out in the suitable time, improve break working life.
Most preferred embodiment of the present invention is illustrated, and various variations or the remodeling made by those of ordinary skills can not depart from the scope of the present invention.
Claims (9)
1. integrated valve that the band oil circuit that is used for the control of oil hydraulic motor break is selected, comprise valve body (1), it is characterized in that: be shaped on main hydraulic pressure cavity (1a) in the described valve body (1), main hydraulic pressure cavity (1a) lateral symmetry is connected with first valve pocket (1b) and second valve pocket (1c), be separately installed with first check valve assembly (2) and second check valve assembly (3) towards the unidirectional unlatching of main hydraulic pressure cavity (1a) in described first valve pocket (1b) and second valve pocket (1c), and main hydraulic pressure cavity (1a) lower end is connected with the 3rd valve pocket (1d), throttle valve assembly (4) is installed in described the 3rd valve pocket (1d), the hydraulic oil that enters the hydraulic oil of first check valve assembly (2) and enter second check valve assembly (3) relies on pressure free, makes higher one tunnel hydraulic oil enter main hydraulic pressure cavity (1a) and then promote throttle valve assembly (4) action; Described valve body (1) is shaped on first control port (11) and the 4th control port (14) that connects first check valve assembly (2), and second control port (12) and the 5th control port (15) that connect second check valve assembly (3), valve body (1) upper end is shaped on the 3rd oilhole (13) that is communicated with main hydraulic pressure cavity (1a), described the 3rd valve pocket (1d) lower end is connected with drain tap (T), and the 3rd valve pocket (1d) cross connection is useful on the connecting passage mouth (A) that connects break control oil circuit; Wherein drain tap (T) is positioned at the below of throttle valve assembly, connecting passage mouth (A) is communicated with main hydraulic pressure cavity (1a) through first damping hole (411a) of throttle valve assembly (4), under the effect of main hydraulic pressure cavity (1a), connecting passage mouth (A) can be communicated with drain tap (T) through second damping hole (412a) of throttle valve assembly (4).
2. a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control according to claim 1, it is characterized in that: described first check valve assembly (2) comprises first valve seat (21), first valve ball (22) and first ball seat (23); First ball seat (23) and first valve seat (21) all are shaped on the arc-shaped concave that cooperates with first valve ball (22) liquid sealing; Described first ball seat (23) is shaped on first axial bore (23b) that is connected with first radial hole (23a), first axial bore (23b) end connects main hydraulic pressure cavity (1a), the other end matches with first valve ball (22) through the arc-shaped concave of first ball seat (23), described first valve seat (21) is shaped on first oil inlet hole (21a) that is communicated with first control port (11) and the 4th control port (14), and the other end of first oil inlet hole (21a) matches with first valve ball (22) through the arc-shaped concave of first valve seat (21).
3. a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control according to claim 2, it is characterized in that: described second check valve assembly (3) comprises second valve seat (31), second valve ball (32) and second ball seat (33); Second ball seat (33) and second valve seat (31) all are shaped on the arc-shaped concave that cooperates with second valve ball (32) liquid sealing; Described second ball seat (33) is shaped on second axial bore (33b) that is connected with second radial hole (33a), second axial bore (33b) end connects main hydraulic pressure cavity (1a), the other end matches with second valve ball (32) through the arc-shaped concave of second ball seat (33), described second valve seat (31) is shaped on second oil inlet hole (31a) that is communicated with second control port (12) and the 5th control port (15), and the other end of second oil inlet hole (31a) matches with second valve ball (32) through the arc-shaped concave of second valve seat (31).
4. a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control according to claim 3, it is characterized in that: be shaped on first annular groove in described first valve pocket (1b), first annular groove is installed with first hole back-up ring (51), and described first check valve assembly (2) fixedly is fitted in (1b) in first valve pocket through first hole with back-up ring (51); Be shaped on second annular groove in described second valve pocket (1c), second annular groove is installed with second hole back-up ring (52), and described second check valve assembly (3) fixedly is fitted in second valve pocket (1c) with back-up ring (52) through second hole.
5. a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control according to claim 4, it is characterized in that: described throttle valve assembly (4) comprises spool (41), Returnning spring (42) and valve seat (43); Described spool (41) is shaped on the valve rod (412) of valve head (411) and two-section type, the lower end cover of valve rod (412) fits in the seat chamber (43a) of valve seat (43), and valve rod (412) rear surface axially is shaped on the second damping annular flat oral pore (412a), the length of the described second damping annular flat oral pore (412a) is less than the degree of depth of valve seat block chamber (43a), described Returnning spring (42) is sleeved on the valve rod (412), the two ends of Returnning spring (42) respectively with valve head (411) and valve seat (43) phase roof pressure, described valve head (411) is shaped on first damping hole (411a).
6. a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control according to claim 5, it is characterized in that: described valve seat (43) is set with rubber seal (6), and match through the inner circle wall liquid sealing of rubber seal (6) with the 3rd valve pocket (1d), valve seat (43) is shaped on the through hole (43b) that is communicated with drain tap (T) and valve seat block chamber (43a), and described connecting passage mouth (A) is connected with the residing cavity of Returnning spring (42).
7. a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control according to claim 6 is characterized in that: the annular flat oral pore of described first damping hole (411a) for axially being shaped on valve head (411) surface.
8. a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control according to claim 6, it is characterized in that: described first damping hole (411a) is the axial damping through hole of twice of upper and lower symmetry.
9. according to the described a kind of integrated valve of selecting for the band oil circuit of oil hydraulic motor break control of claim 7 or 8 arbitrary claims, it is characterized in that: described the 3rd valve pocket (1d) is shaped on the 3rd annular groove, the 3rd annular groove is installed with the 3rd hole back-up ring (53), and described throttle valve assembly (4) is fixedly mounted in the 3rd valve pocket (1d) with back-up ring (53) through the 3rd hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232263 CN102235394B (en) | 2011-08-15 | 2011-08-15 | Integrated valve with oil circuit selection function for controlling hydraulic motor brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110232263 CN102235394B (en) | 2011-08-15 | 2011-08-15 | Integrated valve with oil circuit selection function for controlling hydraulic motor brake |
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| CN102235394A CN102235394A (en) | 2011-11-09 |
| CN102235394B true CN102235394B (en) | 2013-10-09 |
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| CN 201110232263 Active CN102235394B (en) | 2011-08-15 | 2011-08-15 | Integrated valve with oil circuit selection function for controlling hydraulic motor brake |
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| CN103961924B (en) * | 2014-04-29 | 2016-02-03 | 温州市液压附件厂 | A kind of oil-way integrated block be applied on shortening filter cart |
| CN106178330A (en) * | 2016-07-20 | 2016-12-07 | 湖南鸿腾新能源技术有限公司 | Combiner valve and comprise its gas extinguishing system |
| CN106762969A (en) * | 2016-12-20 | 2017-05-31 | 赛克思液压科技股份有限公司 | A kind of automatic cooling structure of motor |
| CN107989846A (en) * | 2017-12-15 | 2018-05-04 | 中国航空工业集团公司金城南京机电液压工程研究中心 | A kind of bidirectional hydraulic orifice valve |
| CN109365540A (en) * | 2018-11-21 | 2019-02-22 | 泰尔重工股份有限公司 | A kind of axle sleeve locking apparatus by hydraulic control |
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| EP0987505A2 (en) * | 1998-09-18 | 2000-03-22 | TGK Co., Ltd. | Degree-of-supercooling control type expansion valve |
| CN1587018A (en) * | 2004-07-16 | 2005-03-02 | 胡世璇 | Multiple stage pull force automatic switching hydraulic winch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102235394A (en) | 2011-11-09 |
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Address after: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd. Patentee after: SAIKESI HYDRAULIC TECHNOLOGY CO., LTD. Address before: Jiangbei District, Zhejiang city of Ningbo Province China 315021 Street No. 195 Ningbo gontin sks Hydraulic Co. Ltd. Patentee before: Ningbo Wide Sky SKS Hydraulic Co., Ltd. |