CN101943240B - Single overflow hydraulic damper - Google Patents

Abstract

The invention discloses a single-overflow hydraulic damper comprising a hydraulic oil cylinder, a first piston rod, a second piston rod, a piston, a left end cover, a right end cover and an oil tank, wherein a valve block is also arranged outside the hydraulic oil cylinder, and a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, an overflow valve and the oil tank are arranged on the valve block; an outlet of the overflow valve is communicated with the oil tank; an inlet of the first one-way valve is communicated with a first working cavity of the hydraulic oil cylinder, and an outlet of the first one-way valve is communicated with an inlet of the overflow valve; an outlet of the second one-way valve is communicated with the first working cavity of the hydraulic oil cylinder, and an inlet of the second one-way valve is respectively communicated with the outlet of the overflow valve and the oil tank; an inlet of the third one-way valve is communicated with a second working cavity of the hydraulic oil cylinder, and an outlet of the third one-way valve is communicated with the inlet of the overflow valve; and an outlet of the fourth one-way valve is communicated with the second working cavity of the hydraulic oil cylinder, and an inlet of the fourth one-way valve is respectively communicated with the outlet of the overflow valve and the oil tank. The single-overflow hydraulic damper is convenient for processing and can ensure the stability of a working load.

Description

Single overflow hydraulic damper

technical field

The invention relates to a damper, in particular to a single overflow hydraulic damper.

Background technique

At present, hydraulic dampers are widely used in bridges, buildings and other fields. With the continuous improvement of anti-seismic and shock absorption requirements for bridges and buildings, the market demand for hydraulic dampers is also increasing. At the same time, the demand for hydraulic dampers The performance requirements will also gradually increase. Its working principle is: the left installation part and the right installation part are the two installation points of the hydraulic damper, which are installed on two objects or building structures that have relative motion or may generate relative motion. When the left mounting part is fixed and the right mounting part moves relative to each other, the oil in the first working chamber and the second working chamber of the hydraulic damper realizes mutual flow through the damping hole installed on the piston, and generates a certain damping force, consuming two Because the size of the damping force is related to many factors such as the size, shape and speed of the damping hole, it brings great difficulties to the design and manufacture of the hydraulic damper. In addition, the size of the moving speed Will directly affect the size of the damping force. Therefore, at present, the relatively accurate data of the damping force and energy consumption of the hydraulic damper at a certain speed can only be obtained after testing with special and expensive testing equipment. Therefore, the design and processing of the hydraulic damper is difficult and cannot Ensure the stability of the damping force.

Contents of the invention

The purpose of the present invention is to provide a single overflow hydraulic damper which is easy to process and can ensure the stability of the working load.

In order to achieve the above object, the technical solution adopted by the present invention is: a single overflow hydraulic damper, including a hydraulic cylinder, a first piston rod, a second piston rod, a piston, a left end cover, a right end cover and an oil tank, the first piston rod and the second piston rod are fixedly connected to the piston, the piston is located in the hydraulic cylinder, and the piston can slide in the hydraulic cylinder, the left end cover is fixedly connected to the left side of the hydraulic cylinder, and the right end cover is fixedly connected to the right side of the hydraulic cylinder, The piston divides the hydraulic cylinder into the first working chamber and the second working chamber. There is also a piston rod receiving cylinder outside the right end cover. One end of the second piston rod passes through the piston rod hole of the right end cover of the hydraulic cylinder and extends into the piston rod receiving chamber. In the cylinder, one end of the first piston rod passes through the piston rod hole of the left end cover of the hydraulic cylinder, and the end is fixedly connected with the first installation part, and the right end of the piston rod receiving cylinder is fixedly connected with the second installation part, and the hydraulic cylinder is also A valve block is provided, and the valve block is equipped with a first one-way valve, a second one-way valve, a third one-way valve, a fourth one-way valve, an overflow valve and an oil tank; the outlet of the overflow valve communicates with the oil tank; the first The inlet of the one-way valve is connected with the first working chamber of the hydraulic cylinder, and the outlet is connected with the inlet of the relief valve; the outlet of the second one-way valve is connected with the first working chamber of the hydraulic cylinder, and the inlet is respectively connected with the outlet of the relief valve and The oil tank is connected; the inlet of the third one-way valve is connected with the second working chamber of the hydraulic cylinder, and the outlet is connected with the inlet of the overflow valve; the outlet of the fourth one-way valve is connected with the second working chamber of the hydraulic cylinder, and the inlet is respectively connected with the overflow valve. The outlet of the flow valve communicates with the fuel tank.

There is a first annular groove in the piston rod hole of the left end cover, and there are also a first flow hole and a second flow hole communicating with the first annular groove on the left end cover, and the first annular groove communicates with the first working chamber , and one end of the first one-way valve and the second one-way valve communicates with the first flow hole and the second flow hole respectively; the right end cover has a second annular groove, and the right end cover also has a second annular groove The third communication hole and the fourth communication hole communicate, the second annular groove communicates with the second working chamber, and one end of the third check valve and the fourth check valve communicates with the third communication hole and the fourth communication hole respectively .

The first one-way valve communicates with the first flow hole on the left end cover through the first flow pipe, the second one-way valve communicates with the second flow hole on the left end cover through the second flow pipe, and the third one-way valve communicates with the second flow hole on the left end cover through the second flow pipe. The third flow pipe communicates with the third flow hole on the right end cover, and the fourth one-way valve communicates with the fourth flow hole on the right end cover through the fourth flow pipe.

The left end cover and the right end cover are fixedly connected with the hydraulic oil cylinder through screws, and the piston rod receiving cylinder is fixedly connected with the right end cover through screws.

After the above structure is adopted, since the hydraulic cylinder is provided with a valve block, the valve block is equipped with a first check valve, a second check valve, a third check valve, a fourth check valve, an overflow valve and an oil tank; The outlet of the flow valve is connected with the oil tank, the inlet of the first check valve is connected with the first working chamber of the hydraulic cylinder, the outlet is connected with the inlet of the relief valve, and the outlet of the second check valve is connected with the first working chamber of the hydraulic cylinder , the inlet is respectively connected with the outlet of the overflow valve and the oil tank, the inlet of the third check valve is connected with the second working chamber of the hydraulic cylinder, the outlet is connected with the inlet of the overflow valve, the outlet of the fourth check valve is connected with the outlet of the hydraulic cylinder The second working chamber is connected, and the inlet is respectively connected with the outlet of the relief valve and the oil tank. Therefore, after setting the opening pressure of the relief valve, when the oil pressure in the first working chamber or the second working chamber reaches the setting of the relief valve The opening pressure of the first working chamber and the second working chamber can be convected through the relief valve with constant resistance to achieve load-limited energy consumption, so that there is no need to manufacture damping holes on the piston, and there is no need to manufacture damping holes The design and test are carried out according to the size, thus reducing the design difficulty and facilitating processing, and because the opening pressure of the relief valve is set to be constant, the stability of the working load is guaranteed.

Description of drawings

The present invention is described in further detail below in conjunction with the embodiment that accompanying drawing provides.

Fig. 1 is a structural sectional view of the present invention;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is the B-B sectional view of Fig. 1;

Fig. 5 is a schematic diagram of the present invention.

Detailed ways

As shown in Figures 1, 2, 3, 4, and 5, a single overflow hydraulic damper includes a hydraulic cylinder 1, a first piston rod 2, a second piston rod 2', a piston 3, a left end cover 4, and a right end cover 5 and oil tank 6, the first piston rod 2 and the second piston rod 2' are fixedly connected to the piston 3, and are located in the hydraulic cylinder 1, and the piston 3 can slide in the hydraulic cylinder 1, and the left end cover 4 is fixedly connected to the On the left side of the hydraulic cylinder 1, the right end cover 5 is fixedly connected to the right side of the hydraulic cylinder 1, the piston 3 divides the hydraulic cylinder 1 into a first working chamber 1-1 and a second working chamber 1-2, and the outside of the right end cover 5 also has Piston rod accommodation cylinder 7, one end of the second piston rod 2' passes through the second working chamber 1-2 of the hydraulic cylinder 1, and extends into the piston rod accommodation cylinder 7, and one end of the second piston rod 2' passes through the hydraulic cylinder The piston rod hole of the right end cover 5 of 1, and extends into the piston rod receiving cylinder 7, one end of the first piston rod 2 passes through the piston rod hole of the left end cover 4 of the hydraulic cylinder 1, and the end is fixedly connected with the first installation Part 8, the right end of the piston rod receiving cylinder 7 is fixedly connected with the second installation part 9, and the hydraulic cylinder 1 is also provided with a valve block 20, and the valve block 20 is equipped with the first check valve 10, the second check valve 11, the first check valve Three one-way valves 12, the fourth one-way valve 13, overflow valve 14 and oil tank 6; the outlet of the overflow valve 14 is communicated with the oil tank 6; the inlet of the first one-way valve 10 is connected with the first working chamber 1 of the hydraulic cylinder 1 -1 communicates, the outlet communicates with the inlet of the overflow valve 14; the outlet of the second check valve 11 communicates with the first working chamber 1-1 of the hydraulic cylinder 1, and the inlet communicates with the outlet of the overflow valve 14 and the fuel tank 6 respectively; The inlet of the third one-way valve 12 communicates with the second working chamber 1-2 of the hydraulic cylinder 1, and the outlet communicates with the inlet of the relief valve 14; the outlet of the fourth one-way valve 13 communicates with the second working chamber 1 of the hydraulic cylinder 1 -2 communicates, and the inlet communicates with the outlet of the overflow valve 14 and the oil tank 6 respectively.

As shown in Figures 1, 3, and 4, in order to facilitate communication, the piston rod hole of the left end cover 4 has a first annular groove 4-1, and the left end cover 4 also has a ring that communicates with the first annular groove 4-1. The first flow hole 4-2 and the second flow hole 4-3, the first annular groove 4-1 communicates with the first working chamber 1-1, and the first one-way valve 10 and the second one-way valve 11 One end communicates with the first flow hole 4-2 and the second flow hole 4-3 respectively; the right end cover 5 has a second annular groove 5-1, and the right end cover 5 also has a second annular groove 5-1. The third communication hole 5-2 and the fourth communication hole 5-3 communicate, the second annular groove 5-1 communicates with the second working chamber 1-2, and the third one-way valve 12 and the fourth one-way valve 13 One end of each communicates with the third flow hole 5-2 and the fourth flow hole 5-3.

As shown in Figures 1 and 2, as shown in Figures 1 and 2, in order to make the first one-way valve 10 and the second one-way valve 11 communicate with the first working chamber 1-1, the third one-way valve 12, the fourth one-way valve The one-way valves 13 are all connected to the second working chamber 1-2, the first one-way valve 10 communicates with the first flow hole 4-2 on the left end cover 4 through the first flow pipe 15, and the second one-way valve 11 passes through The second flow pipe 16 communicates with the second flow hole 4-3 on the left end cover 4, the third check valve 12 communicates with the third flow hole 5-2 on the right end cover 5 through the third flow pipe 17, and the fourth one-way valve 12 communicates with the third flow hole 5-2 on the right end cover 5 through the third flow pipe 17. The direction valve 13 communicates with the fourth flow hole 5 - 3 on the right end cover 5 through the fourth flow pipe 18 .

As shown in FIG. 1 , for fixed connection, the left end cover 4 and the right end cover 5 are fixedly connected with the hydraulic cylinder 1 through screws 19 , and the piston rod receiving cylinder 7 is fixedly connected with the right end cover 5 through screws 19 .

As shown in Figure 1, when the present invention is used, the first mounting part 8 and the second mounting part 9 are respectively fixed on two objects or buildings that can produce relative motion, and the second mounting part 9 has a certain effect to the right When the oil pressure formed by this force in the first working chamber 1-1 reaches the opening pressure set by the relief valve 14, the oil in the first working chamber 1-1 can pass through the first check valve 10 and After passing through the overflow valve 14 and then flowing through the fourth one-way valve 13, returning to the second working chamber 1-2, the second mounting part 9 will move to the right under the effect of a certain resistance, and the product of this resistance and the moving distance will be is the energy consumed when the hydraulic damper moves to the right; similarly, when the first installation part 8 is fixed, the second installation part 9 has a certain force to the left, when this force is in the second working chamber 1- 2 When the formed oil pressure reaches the opening pressure set by the overflow valve 14, the oil in the second working chamber 1-2 can pass through the third check valve 12 and the overflow valve 14, and then flow through the second check valve 11 Returning to the first working chamber 1-1, the second mounting part 9 will move to the left under the action of a certain resistance, and the product of the resistance and the moving distance is the energy consumed when the hydraulic damper moves to the left; The opening pressure set by the relief valve 14 is constant, and when the relative movement speed between the first installation part 8 and the second installation part 9 is constant, the power consumed by the hydraulic damper is constant. The oil tank 6 can absorb or release oil to eliminate the influence of ambient temperature on the volume change of the oil inside the main body of the hydraulic damper. The hydraulic damper can set the opening pressure of the overflow valve 14 to keep the working load of the hydraulic damper constant; When the damper is working, all the oil flowing out of the working chamber of the hydraulic damper overflows through the overflow valve 14, which greatly improves the energy consumption rate of the hydraulic damper.

Claims (4)

1. single overflow hydraulic damper; Comprise hydraulic jack (1), first piston bar (2), second piston rod (2 '), piston (3), left end cap (4), right end cap (5) and fuel tank (6); The first piston bar (2) and second piston rod (2 ') all are fixedly connected on the piston (3), and piston (3) is positioned at hydraulic jack (1), and piston (3) can slippage in hydraulic jack (1); Left end cap (4) is fixedly connected on the left side of hydraulic jack (1); Right end cap (5) is fixedly connected on the right side of hydraulic jack (1), and piston (3) is divided into first active chamber (1-1) and second active chamber (1-2) to hydraulic jack (1), and the outside of right end cap (5) also has piston rod accommodating cylinder (7); One end of second piston rod (2 ') passes the piston rod hole of the right end cap (5) of hydraulic jack (1); And stretch in the piston rod accommodating cylinder (7), an end of first piston bar (2) passes the piston rod hole of the left end cap (4) of hydraulic jack (1), and the end is fixedly connected with first assembly department (8); The right-hand member of piston rod accommodating cylinder (7) is fixedly connected with second assembly department (9), it is characterized in that:

Also be provided with valve piece (20) outside a, the hydraulic jack (1), first one-way valve (10), second one-way valve (11), the 3rd one-way valve (12), the 4th one-way valve (13), relief valve (14) and fuel tank (6) are housed on the valve piece (20);

The outlet of b, relief valve (14) is communicated with fuel tank (6);

The import of c, first one-way valve (10) is communicated with first active chamber (1-1) of hydraulic jack (1), and outlet is communicated with the import of relief valve (14);

The outlet of d, second one-way valve (11) is communicated with first active chamber (1-1) of hydraulic jack (1), and import is communicated with the outlet and the fuel tank (6) of relief valve (14) respectively;

The import of e, the 3rd one-way valve (12) is communicated with second active chamber (1-2) of hydraulic jack (1), and outlet is communicated with the import of relief valve (14);

The outlet of f, the 4th one-way valve (13) is communicated with second active chamber (1-2) of hydraulic jack (1), and import is communicated with the outlet and the fuel tank (6) of relief valve (14) respectively.

2. single overflow hydraulic damper according to claim 1; It is characterized in that: have first annular groove (4-1) in the piston rod hole of said left end cap (4); Also have the first-class through hole (4-2) and second opening (4-3) that are communicated with first annular groove (4-1) on the left end cap (4); First annular groove (4-1) is communicated with first active chamber (1-1), and an end of first one-way valve (10) and second one-way valve (11) is communicated with first-class through hole (4-2) and second opening (4-3) respectively; Said right end cap (5) has second annular groove (5-1); Also have the 3rd opening (5-2) and the 4th opening (5-3) that are communicated with second annular groove (5-1) on the right end cap (5); Second annular groove (5-1) is communicated with second active chamber (1-2), and an end of the 3rd one-way valve (12) and the 4th one-way valve (13) is communicated with the 3rd opening (5-2) and the 4th opening (5-3) respectively.

3. single overflow hydraulic damper according to claim 2; It is characterized in that: said first one-way valve (10) is communicated with first-class through hole (4-2) on the left end cap (4) through first-class siphunculus (15); Second one-way valve (11) is communicated with second opening (4-3) on the left end cap (4) through second runner pipe (16); The 3rd one-way valve (12) is communicated with the 3rd opening (5-2) on the right end cap (5) through the 3rd runner pipe (17), and the 4th one-way valve (13) passes through the 4th runner pipe (18) and is communicated with the 4th opening (5-3) on the right end cap (5).

4. single overflow hydraulic damper according to claim 1 is characterized in that: said left end cap (4) is fixedly connected with hydraulic jack (1) through screw (19) with right end cap (5), and piston rod accommodating cylinder (7) is fixedly connected with right end cap (5) through screw (19).

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