CN2835699Y

CN2835699Y - Hydro-pneumatic buffer

Info

Publication number: CN2835699Y
Application number: CN 200420108483
Authority: CN
Inventors: 苗明; 杨万春; 吴德彬
Original assignee: Dalian Spring Polyurethane Fender Technology Development Co Ltd; Dalian University of Technology
Current assignee: Dalian Spring Polyurethane Fender Technology Development Co Ltd; Dalian University of Technology
Priority date: 2004-10-22
Filing date: 2004-10-22
Publication date: 2006-11-08
Anticipated expiration: 2014-10-22

Abstract

The utility model relates to a hydro-pneumatic buffer, which belongs to the field of safety devices of hoisting machinery, handling machinery, elevators and mine cars. The hydro-pneumatic buffer is composed of a cylinder installed outside a piston, a throttle valve installed inside the piston, a piston rod installed at one end of the piston, and a guide sleeve installed at one end of the cylinder, wherein in the buffer, an inner cavity of a cylinder body is filled with hydraulic oil to become a liquid cavity, a right inner cavity of a piston cylinder is filled with nitrogen gas to become a gas cavity, and the gas cavity is at the right of the liquid cavity; the cylinder is composed of the cylinder body, a screw plug and a sealing ring which are installed on the left end of the cylinder body; the piston rod is installed in the inner cavity of the cylinder cavity; the piston rod is composed of the throttle valve, a guide ring, a sealing ring, the piston cylinder and a gas valve. The hydro-pneumatic buffer has advantages of novel structure, simple structure, good manufacturability and good buffering property. The utility model can be used for buffering impact at the time of collision when the hoisting machinery, the handling machinery, the elevators and the mine cars are in operation.

Description

A kind of hydro-pneumatic buffer

A kind of hydro-pneumatic buffer of technical field the utility model belongs to the safety installations field of lifting, charging crane, elevator and mine car.

Background technique is present, and hydro-pneumatic buffer has following several form: 1, rely on the gap value between buffering plug and the piston to cushion.So on the one hand strict requirement, difficult design are on the one hand processed, are equipped with to the buffering plug.2, rely on the buffering aperture that gathers in the cylinder barrel to cushion.Have difficult design equally, be difficult to accurately calculate the size in each hole and distribute, damping characteristics can not be adjusted in addition.

The summary of the invention the purpose of this utility model is the deficiency that has the related fluid pneumatic buffer now in order to overcome, and a kind of hydro-pneumatic buffer that relies on throttle valve to cushion is provided, and buffer has liquid container and two chambeies of air chamber.Improved shock-absorbing capacity better, make damping characteristics more reasonable, and spring-back force has been very little.Construct novel, simple in structure, good manufacturability, damping characteristics is good.

The technical solution adopted in the utility model is: a kind of hydro-pneumatic buffer, it is made up of the cylinder components I that is contained in piston element IV outside, the throttle valve II that is contained in piston element IV inside, the guide sleeve parts V that is contained in the piston rod part III of piston element IV one end and is contained in cylinder components I one end.Buffer is full of hydraulic oil in cylinder body 3 inner chambers become liquid container A, and the right inner chamber of piston cylinder 17 is full of nitrogen becomes air chamber B, and air chamber B is on the right side of liquid container A.

Cylinder components I is made up of cylinder body 3 and the plug screw 1 and the seal ring 2 that are installed in the cylinder body 3 left end center holes; The piston rod part III that is contained in cylinder body 3 inner chambers is made up of throttle valve II, guide ring 6, seal ring 7, piston cylinder 17, air valve 18; Guide ring 6 and seal ring 7 are installed in respectively in two annular grooves of piston cylinder 17 left part external cylindrical surfaces, and air valve 18 is contained in the upper right side of piston cylinder 17; The throttle valve II that is contained in piston rod part III left end is made up of valve seat 4, spool 5, dish spring 9, valve body 8; Valve core 5 front portions are coniform being inserted in the valve seat 4, and the rear portion is a column, and dish spring 9 is installed in valve core 5 rear portions, and valve seat 4 and valve core 5 are contained in the valve body 8, and valve body 8 is contained in the left part inner chamber of piston cylinder 17, is fixed on piston cylinder 17 heads by screw thread; The piston element IV that is contained in the piston cylinder 17 is made up of seal ring 10, guide ring 11, piston body 12; Guide ring 11 and seal ring 10 are contained in respectively on the piston body 12; Guide sleeve parts V is made up of guide ring 13, guide sleeve 14, dust ring 16, and guide ring 13, dust ring 16 are installed on the guide sleeve 14, and guide sleeve 14 usefulness bolts 15 are fixed on the cylinder body 3; See accompanying drawing 1.

The beneficial effects of the utility model:, shock-absorbing capacity is adjusted with the adjusting of dish spring owing to adopt throttle valve.After buffering finishes, can make buffer not have spring-back force, make damping characteristics more reasonable.Simple structure.Use wide.Can be used for Hoisting Machinery, charging crane, elevator and mine car and move shock absorbing when colliding.

The sectional view of description of drawings 1-hydro-pneumatic buffer; Among the figure: I. cylinder components, II. throttle valve, III. piston rod part, IV. piston element, V. guide sleeve parts 1. plug screws, 2. seal ring, 3. cylinder body, 4. valve seat, 5. spool, 6. guide ring, 7. seal ring, 8. valve body, 9. dish spring, 10. seal ring, 11. guide rings, 12. pistons, 13. guide ring, 14. guide sleeves, 15. screw rods, 16. dust rings, 17. piston rod, 18. air valves, A. oil pocket, B. air cavity.

Embodiment is example explanation embodiment with the accompanying drawing: during use, when the outer end of the piston rod part III of hydro-pneumatic buffer is subjected to impact force, the oil pocket motion of piston rod 17 in cylinder barrel I, the compression oil pocket, at this moment oil pocket oil pressure under the effect that is subjected to external force sharply raises, hydraulic oil is opened at the spool 5 of following throttle valve II of high pressure effect, hydraulic oil enters piston rod 17 inner chambers by throttle valve II, promote the piston 12 in the piston rod, the compression air cavity, mechanical energy when making bump becomes the heat energy of hydraulic oil and gas, thereby plays the effect of buffering collision of closed.

When impact force is smaller or stroke speed when smaller, the energy shortage of bump is opened with the spool 5 throttle valve II, and at this moment hydraulic oil enters piston rod 17 inner chambers by the little gap between spool 5 and the valve seat 4, the compression air cavity, thus play buffer function.When impact force was bigger, big Impact energy was opened the spool 5 of throttle valve II, and hydraulic oil enters piston rod 17 inner chambers by the big gap between spool 5 and the valve seat 4, the compression air cavity, thereby alleviated the peak value that clashes into when fierce, improved damping characteristics, made it more reasonable.After buffering finished, throttle valve cut out, and the gap of the spool of throttle valve and valve base chamber is very little after closing, and hydraulic oil flows back to liquid container through this little gap under the effect of pressurized gas.Make buffer reply former state.Because when replying, the gap of spool and valve base chamber is very little, so, reply oil seldom, thereby make spring-back force very little, can be described as no resilience buffer.

Claims

1, a kind of hydro-pneumatic buffer by the cylinder components (I) that is contained in piston element (IV) outside, the guide sleeve parts (V) that are contained in the inner throttle valve (II) of piston element (IV), are contained in the piston rod part (III) of piston element (IV) end and are contained in cylinder components (I) end form, it is characterized in that, buffer is full of hydraulic oil in cylinder body (3) inner chamber become liquid container (A), the right inner chamber of piston cylinder (17) is full of nitrogen becomes air chamber (B), and air chamber (B) is on the right side of liquid container (A);

Cylinder components (I) is made up of cylinder body (3) and the plug screw (1) and the seal ring (2) that are installed in cylinder body (3) the left end center hole; The piston rod part (III) that is contained in cylinder body (3) inner chamber is made up of throttle valve (II), guide ring (6), seal ring (7), piston cylinder (17), air valve (18); Guide ring (6) and seal ring (7) are installed in respectively in two annular grooves of piston cylinder (17) left part external cylindrical surface, and air valve (18) is contained in the upper right side of piston cylinder (17); The throttle valve (II) that is contained in piston rod part (III) left end is made up of valve seat (4), spool (5), dish spring (9), valve body (8); Spool (5) is anterior to be coniform being inserted in the valve seat (4), the rear portion is a column, dish spring (9) is installed in spool (5) rear portion, valve seat (4) and spool (5) are contained in the valve body (8), valve body (8) is contained in the left part inner chamber of piston cylinder (17), be fixed on piston cylinder (17) head by screw thread, the piston element (IV) that is contained in the piston cylinder (17) is made up of seal ring (10), guide ring (11), piston body (12); Guide ring (11) and seal ring (10) are contained in respectively on the piston body (12); Guide sleeve parts (V) are made up of guide ring (13), guide sleeve (14), dust ring (16), and guide ring (13), dust ring (16) are installed on the guide sleeve (14), and guide sleeve (14) is fixed on the cylinder body (3) with bolt (15).