CN203412858U - Flushing valve for hydraulic motor of closed system - Google Patents

Flushing valve for hydraulic motor of closed system Download PDF

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Publication number
CN203412858U
CN203412858U CN201320491045.4U CN201320491045U CN203412858U CN 203412858 U CN203412858 U CN 203412858U CN 201320491045 U CN201320491045 U CN 201320491045U CN 203412858 U CN203412858 U CN 203412858U
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CN
China
Prior art keywords
cylinder
oil
oil pocket
valve
closed
Prior art date
Application number
CN201320491045.4U
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Chinese (zh)
Inventor
余红波
刘辉
韩帅
Original Assignee
龙工(上海)精工液压有限公司
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Priority to CN201320491045.4U priority Critical patent/CN203412858U/en
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Publication of CN203412858U publication Critical patent/CN203412858U/en

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Abstract

The utility model discloses a flushing valve for a hydraulic motor of a closed system. The flushing valve is characterized by comprising a cavity body, wherein a first oil chamber, a second oil chamber and a third oil chamber are formed in the cavity body; the third oil chamber is connected with each of the first and second oil chambers through a two-way moving valve rod; one side of the cavity body is connected with an oil sealing screw plug; one end of the third oil chamber is connected with one end of a pressure stabilizing valve element in a pressure stabilizing valve; a second oil sealing screw plug is arranged at the other end of the pressure stabilizing valve element. The flushing valve has the characteristics of optimal and compact structure, sensitivity and reliability in action, slight influence of pressure fluctuation of the system, and the like.

Description

A kind of flushing valve for closed system oil hydraulic motor
Technical field
The utility model relates to a kind of flushing valve for closed system oil hydraulic motor, for hydraulic construction machine walking, drives and lifting gear, belongs to technical field of hydraulic elements.
Background technique
In fields such as engineering machinery, mining machinery, building machineries, often adopt closed system oil hydraulic motor to drive walking or lifting gear.Closed system oil hydraulic motor is in continuous operation process, for each friction pair wearing clearance of avoiding high temperature to cause excessive, cause interior discharge large, volumetric efficiency reduces and the interior impurity of motor cavity increases, the situation that oil cleanliness reduces occurs, must rinse motor inner chamber, take away impurity and carry out cooling.Traditional flushing valve structure is complicated, and machining accuracy and the manufacturability of part are had relatively high expectations, and rate of fault is high, affect the developing result of motor, causes the life-span of motor to be reduced.
Summary of the invention
The technical problems to be solved in the utility model is: provide a kind of simple and compact for structure, flushing valve for closed system oil hydraulic motor stable and reliable for performance, solved traditional flushing valve structure complicated, machining accuracy and the manufacturability of part are had relatively high expectations, and rate of fault is high, affect the developing result of motor, cause the problem of the life-span reduction of motor.
In order to solve the problems of the technologies described above, the technical solution of the utility model has been to provide a kind of flushing valve for closed system oil hydraulic motor, it is characterized in that, comprise cavity, in cavity, be provided with the first oil pocket, the second oil pocket and the 3rd oil pocket, all the valve rod by can way moving is connected between the first oil pocket and the 3rd oil pocket and between the second oil pocket and the 3rd oil pocket, one side of cavity is connected with the first oil sealing screw plug, one end of the 3rd oil pocket is connected with the stabilizing valve core one end in pressure maintaining valve, and the other end of stabilizing valve core is provided with the second oil sealing screw plug.
Preferably, the two ends of described valve rod are connected with the opposite side of the first oil sealing screw plug, cavity by the first Returnning spring, the second Returnning spring respectively.
Preferably, described stabilizing valve core is provided with spring screens, between spring screens and the second oil sealing screw plug, is provided with the 4th oil pocket, is provided with the 3rd Returnning spring in the 4th oil pocket.
Preferably, described stabilizing valve core is provided with balancing slit.
Preferably, in described stabilizing valve core, be provided with throttle orifice.
Preferably, described valve rod by cavity every being divided into Wu Ge grease chamber, comprise except the first oil pocket, the second oil pocket and the 3rd oil pocket, also comprise the first pressure release grease chamber, the second pressure release grease chamber, the first pressure release grease chamber, the second pressure release grease chamber are connected with the first oil pocket, the second oil pocket by the compensating groove at valve rod two ends respectively.
Preferably, described valve rod comprises the first cylinder, one end of the first cylinder is connected with the first oil sealing screw plug by the first Returnning spring, the other end of the first cylinder is connected with one end of the 3rd cylinder by the second cylinder, the other end of the 3rd cylinder is connected with one end of the 5th cylinder by the 4th cylinder, the other end of the 5th cylinder is connected with one end of the 7th cylinder by the 6th cylinder, the other end of the 7th cylinder is connected with one end of the 9th cylinder by the 8th cylinder, and the other end of the 9th cylinder is connected with the opposite side of cavity by the second Returnning spring.
Preferably, the maximum outside diameter of described the second cylinder with the maximum outside diameter of the 8th cylinder, the maximum outside diameter of the maximum outside diameter of the 4th cylinder, the 6th cylinder is identical, and be all greater than the maximum outside diameter of the first cylinder, the maximum outside diameter of the maximum outside diameter of the 3rd cylinder, the 5th cylinder, the maximum outside diameter of the maximum outside diameter of the 7th cylinder, the 9th cylinder.
Preferably, on the second described cylinder and the 8th cylinder, be equipped with compensating groove.
All the valve rod by can way moving is connected between the first oil pocket in the utility model and the 3rd oil pocket and between the second oil pocket and the 3rd oil pocket, and to realize motor two-direction rotation, the valve rod of high-pressure oil passage under changing with back pressure oil circuit moves and flushing work; Stabilizing valve core in pressure maintaining valve coordinates cylndrical surface to have balancing slit, smooth and easy for guaranteeing that stabilizing valve core moves; Stabilizing valve core inside is processed with throttle orifice, for controlling flushing flow rate.
The utlity model has structure optimization compactness, be active in one's movements reliable, be subject to system pressure influence of fluctuations little, guarantee flushing valve stable operation, and then performance and the life-span of having guaranteed motor.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the flushing valve for closed system oil hydraulic motor;
Fig. 2 is the enlarged diagram of stabilizing valve core;
Fig. 3 is the partial enlarged drawing of Fig. 2.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
The utility model is a kind of flushing valve for closed system oil hydraulic motor, as shown in Figure 1, is a kind of structural representation of the flushing valve for closed system oil hydraulic motor.It comprises cavity 4, in cavity 4, there are the first oil pocket a, the second oil pocket b and the 3rd oil pocket e, all the valve rod 3 by can way moving is connected between the first oil pocket a and the 3rd oil pocket e and between the second oil pocket b and the 3rd oil pocket e, to realize motor two-direction rotation, the valve rod 3 under high-pressure oil passage and the conversion of back pressure oil circuit moves and flushing work.On two sections of cylinders that the two ends of valve rod 3 coordinate with valve-rod cavity 4 (the second cylinder 32 and the 8th cylinder 38), be respectively processed with an off-load plane (being compensating groove 12).Valve rod 3 by cavity 4 every being divided into Wu Ge grease chamber, comprise except the first oil pocket a, the second oil pocket b and the 3rd oil pocket e, also comprise the first d of pressure release grease chamber, the second c of pressure release grease chamber, between the first oil pocket a and the second c of pressure release grease chamber and between the second oil pocket b and the first d of pressure release grease chamber, by compensating groove 12, be communicated with.One side of cavity 4 is connected with the first oil sealing screw plug 1, and one end of the 3rd oil pocket e is connected with stabilizing valve core 6 one end in pressure maintaining valve 13, and the other end of stabilizing valve core 6 is provided with the second oil sealing screw plug 8.The two ends of valve rod 3 are connected with the opposite side of the first oil sealing screw plug 1, cavity 4 by the first Returnning spring 2, the second Returnning spring 5 respectively.
Valve rod 3 comprises the first cylinder 31, one end of the first cylinder 31 is connected with the first oil sealing screw plug 1 by the first Returnning spring 2, the other end of the first cylinder 31 is connected with one end of the 3rd cylinder 33 by the second cylinder 32, the other end of the 3rd cylinder 33 is connected with one end of the 5th cylinder 35 by the 4th cylinder 34, the other end of the 5th cylinder 35 is connected with one end of the 7th cylinder 37 by the 6th cylinder 36, the other end of the 7th cylinder 37 is connected with one end of the 9th cylinder 39 by the 8th cylinder 38, the other end of the 9th cylinder 39 is connected with the opposite side of cavity 4 by the second Returnning spring 5.
The maximum outside diameter of the second cylinder 32 with the maximum outside diameter of the 8th cylinder 38, the maximum outside diameter of the maximum outside diameter of the 4th cylinder 34, the 6th cylinder 36 is identical, and be all greater than the maximum outside diameter of the first cylinder 31, the maximum outside diameter of the maximum outside diameter of the 3rd cylinder 33, the 5th cylinder 35, the maximum outside diameter of the maximum outside diameter of the 7th cylinder 37, the 9th cylinder 39.
Valve rod 3 is promoted by high pressure oil, connects back pressure oil circuit and rinses oil circuit.Rinse between oil circuit (the 3rd oil pocket e) and motor inner chamber and be provided with pressure maintaining valve 13, the stabilizing valve core 6 in pressure maintaining valve 13 coordinates cylndrical surface to have balancing slit 10 (as shown in Figure 3), smooth and easy for guaranteeing that stabilizing valve core 6 moves; As shown in Figure 2, stabilizing valve core 6 inside are processed with throttle orifice 9, for controlling flushing flow rate; On stabilizing valve core 6, having spring screens 11, is the 4th oil pocket f between the second oil sealing screw plug 8 on the spring screens 11 of stabilizing valve core 6 and pressure maintaining valve 13, and the 3rd Returnning spring 7 is installed in the 4th oil pocket f.
Before motor starting, valve rod 3 is in meta, and the first oil pocket a, the second oil pocket b and the 3rd oil pocket e are not connected.After motor starting rotation, the first oil pocket a, the second oil pocket b respectively with the actuator port A of motor, B connects, when A enters B and goes out, the first oil pocket a is high pressure oil, the second oil pocket b is back pressure oil return, the fluid of the first oil pocket a and the second oil pocket b enters the first d of pressure release grease chamber and the second c of pressure release grease chamber by the plane compensating groove 12 on valve rod 3 respectively, compensating groove 12 there are differences the sectional area of 3 two sections of cylinders of valve rod, therefore, the high pressure oil of the first oil pocket a is different to the active force of the left and right sides surface of contact of valve rod 3, the thrust that the pressure difference of the two produces left valve rod 3, in like manner, the thrust that the fluid of the second oil pocket b produces to the right valve rod 3.Because the first oil pocket a is high pressure oil, therefore the fluid of the first oil pocket a to the active force of valve rod 3 much larger than the second oil pocket b, therefore, valve rod 3 moves to left, the first Returnning spring 2 is compressed, simultaneously, the flushing oil circuit of the back pressure oil circuit of the second oil pocket b and the 3rd oil pocket e is connected, the fluid of the second oil pocket b enters the 3rd oil pocket e, when pressure reaches the setting pressure of pressure maintaining valve 13, stabilizing valve core 6 moves down, the spool conical surface of stabilizing valve core 6 is separated with the cavity of the 3rd oil pocket e, fluid enters the 4th oil pocket f by the throttle orifice 9 of stabilizing valve core 6 inside, the 4th oil pocket f communicates with motor inner chamber, fluid enters motor inner chamber and rinses with cooling.When motor counterrotating, when B enters A and goes out, its working principle is identical.

Claims (9)

1. the flushing valve for closed system oil hydraulic motor, it is characterized in that, comprise cavity (4), in cavity (4), be provided with the first oil pocket (a), the second oil pocket (b) and the 3rd oil pocket (e), all the valve rod (3) by can way moving is connected between the first oil pocket (a) and the 3rd oil pocket (e) and between the second oil pocket (b) and the 3rd oil pocket (e), one side of cavity (4) is connected with the first oil sealing screw plug (1), one end of the 3rd oil pocket (e) is connected with stabilizing valve core (6) one end in pressure maintaining valve (13), the other end of stabilizing valve core (6) is provided with the second oil sealing screw plug (8).
2. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 1, it is characterized in that, the two ends of described valve rod (3) are connected with the opposite side of the first oil sealing screw plug (1), cavity (4) by the first Returnning spring (2), the second Returnning spring (5) respectively.
3. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 1, it is characterized in that, described stabilizing valve core (6) is provided with spring screens (11), between spring screens (11) and the second oil sealing screw plug (8), be provided with the 4th oil pocket (f), in the 4th oil pocket (f), be provided with the 3rd Returnning spring (7).
4. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 1, is characterized in that, described stabilizing valve core (6) is provided with balancing slit (10).
5. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 1, is characterized in that, is provided with throttle orifice (9) in described stabilizing valve core (6).
6. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 1, it is characterized in that, described valve rod (3) by cavity (4) every being divided into Wu Ge grease chamber, comprise except the first oil pocket (a), the second oil pocket (b) and the 3rd oil pocket (e), also comprise the first pressure release grease chamber (d), the second pressure release grease chamber (c), the first pressure release grease chamber (d), the second pressure release grease chamber (c) are connected with the first oil pocket (a), the second oil pocket (b) by the compensating groove (12) at valve rod (3) two ends respectively.
7. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 1, it is characterized in that, described valve rod (3) comprises the first cylinder (31), one end of the first cylinder (31) is connected with the first oil sealing screw plug (1) by the first Returnning spring (2), the other end of the first cylinder (31) is connected with one end of the 3rd cylinder (33) by the second cylinder (32), the other end of the 3rd cylinder (33) is connected with one end of the 5th cylinder (35) by the 4th cylinder (34), the other end of the 5th cylinder (35) is connected with one end of the 7th cylinder (37) by the 6th cylinder (36), the other end of the 7th cylinder (37) is connected with one end of the 9th cylinder (39) by the 8th cylinder (38), the other end of the 9th cylinder (39) is connected with the opposite side of cavity (4) by the second Returnning spring (5).
8. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 7, it is characterized in that, the maximum outside diameter of described the second cylinder (32) with the maximum outside diameter of the 8th cylinder (38), the maximum outside diameter of the maximum outside diameter of the 4th cylinder (34), the 6th cylinder (36) is identical, and be all greater than the maximum outside diameter of the first cylinder (31), the maximum outside diameter of the maximum outside diameter of the 3rd cylinder (33), the 5th cylinder (35), the maximum outside diameter of the maximum outside diameter of the 7th cylinder (37), the 9th cylinder (39).
9. a kind of flushing valve for closed system oil hydraulic motor as claimed in claim 7, is characterized in that, on described the second cylinder (32) and the 8th cylinder (38), is equipped with compensating groove (12).
CN201320491045.4U 2013-08-12 2013-08-12 Flushing valve for hydraulic motor of closed system CN203412858U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201320491045.4U CN203412858U (en) 2013-08-12 2013-08-12 Flushing valve for hydraulic motor of closed system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201320491045.4U CN203412858U (en) 2013-08-12 2013-08-12 Flushing valve for hydraulic motor of closed system

Publications (1)

Publication Number Publication Date
CN203412858U true CN203412858U (en) 2014-01-29

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ID=49975747

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201320491045.4U CN203412858U (en) 2013-08-12 2013-08-12 Flushing valve for hydraulic motor of closed system

Country Status (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358748A (en) * 2014-11-03 2015-02-18 南京萨伯工业设计研究院有限公司 Backflow flush valve for motor and control method of backflow flush valve
CN104930022A (en) * 2015-06-24 2015-09-23 海特克液压有限公司 Hydraulic transmission device with flush valve
CN105041784A (en) * 2015-06-24 2015-11-11 海特克液压有限公司 Flushing valve
CN105822828A (en) * 2016-05-19 2016-08-03 龙工(上海)精工液压有限公司 Dismountable flush valve internal limiting structure
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

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104358748A (en) * 2014-11-03 2015-02-18 南京萨伯工业设计研究院有限公司 Backflow flush valve for motor and control method of backflow flush valve
CN104930022A (en) * 2015-06-24 2015-09-23 海特克液压有限公司 Hydraulic transmission device with flush valve
CN105041784A (en) * 2015-06-24 2015-11-11 海特克液压有限公司 Flushing valve
CN105822828A (en) * 2016-05-19 2016-08-03 龙工(上海)精工液压有限公司 Dismountable flush valve internal limiting structure
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

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