CN2382901Y - Seal device of rubber O shape seal ring without compressing content - Google Patents

Abstract

The utility model discloses a sealing device of rubber O-shaped sealing ring without compressing content. The rubber O-shaped sealing ring of which the cross section diameter phi is equal to D is arranged in a slot of matching and coupling parts, wherein, the depth of the slot of the matching and coupling parts is L, and the width the matching and coupling parts is B, so the seal can be realized, but the sealing ring has not mechanical compressing amount, namely, the dimension of the sealing ring that L is more than D and B is more than D. The utility model breaks through the regular modus operandi that the sealing ring having definite compressing amount has the sealing function after the sealig ring which is traditional thought is assembled and emplace; accordingly, a soft sealing device can also reach national first-degree standard, the utility model can be used in the occasions of the sealing oil and the sealing gas of a hydraulic type tester, etc., so that the utility model has many unexpected effects.

Description

The RUBBER O RunddichtringO does not have the seal arrangement of decrement

The utility model belongs to technical field of sealing technology, is mainly used in hydraulic testing machine.

The confidential acquisition test pressure of hydraulic pressure test must seal hydraulic oil, makes it to reach high pressure.The present common employing clearance seal of China's hydraulic dynamometer, promptly the cooperation between working piston and the oil cylinder has only slight clearance, thereby plays the oil sealing effect.Require the quality of fit height between this coupling part, the gap is little, and frictional force is also very little, just can reach country-level accuracy standard, so requirement on machining accuracy is very high.Because slight clearance is arranged, high pressure oil increases and the amount of leakage increase with pressure, the acquisition of high pressure and just to need to keep the oil pump and the more powerful motor of big oil pump capacity, volume and operational noise that this certainly will increase testing machine again improve the manufacture cost and the sales price of testing machine simultaneously.If select another kind of sealing technique for use, promptly carry out oil sealing with the O RunddichtringO, routinely with seal ring to carrying out oil sealing between oil cylinder and the piston, show for seal ring after assembling is in place, will have certain decrement just can play seal action according to domestic and international all data, otherwise just can not reach the oil sealing effect.The document record can be rolled up the 33rd piece 40 pages, 41 pages table 13 and table 14 referring to " mechanical design handbook " the 4th of China Machine Press in 1991.Because seal ring is had certain decrement after assembling,, just can not reach country-level accuracy standard with the testing machine of soft seal so between piston and oil cylinder, exist bigger frictional force.Always the puzzling design scientific and technical personnel of China's testing machine industry of above-mentioned technical barrier.

The purpose of this utility model is big for overcoming the clearance seal difficulty of processing exactly, leakage rate is big when high pressure, and adopt the O RunddichtringO frictional force that decrement is arranged to increase, the defective that precision lowers, provide a kind of easy to process, cost is low, the RUBBER O RunddichtringO that increases frictional force does not again hardly have the decrement seal arrangement.

Technical solutions of the utility model are as follows: a kind of RUBBER O RunddichtringO does not have the seal arrangement of decrement, the RUBBER O RunddichtringO of cross section diameter Φ=D is contained in the dark L that is, wide is to seal in the mated pair groove of B, it is characterized in that this Sealing is not had mechanical decrement, i.e. size: L＞D, B＞D.

Adopt present technique, can make the quality of fit between piston, the oil cylinder require to reduce, easy to process, reduce cost, easily obtaining high pressure and frictional force does not almost increase, and can reach country-level accuracy standard.Apply to especially that volume and noise greatly reduce behind the large-tonnage testing machine, sealing effect is better.The utility model structure is very simple, and it has broken through the constraint of traditional concept with the courage of unique design and innovation, has solved long-term puzzlement people's technical barrier.

Fig. 1 is the utility model structural representation.

The RUBBER O RunddichtringO does not have the seal arrangement of decrement as shown in the figure, the RUBBER O RunddichtringO (2) of cross section diameter Φ=D is installed in the dark L that is, seal in the wide groove, it is characterized in that this Sealing is not had mechanical decrement, i.e. size: L＞D, B＞D for the oil cylinder of B (3).The utility model can be realized with following mode: open a degree of depth L, width B all greater than the circular groove of O RunddichtringO cross section diameter D at oil cylinder (3) inwall, the RUBBER O RunddichtringO (2) that internal diameter is slightly less than piston diameter places in this groove, is inserted in piston (1) in the seal ring.When oil pressure in the oil cylinder raise, this device just played seal action.The existing claimant new soft seal technology achieving success of test on YE-3000 type large-tonnage hydraulic pressure testing machine, this device can guarantee country-level accuracy standard.Adopt the RUBBER O RunddichtringO not have the seal arrangement of decrement, the testing machine pointer returns zero error and 0.3% drops to 0.1% when decrement is arranged.The complete machine noise then drops to below 75 decibels from original nearly 80 decibels.The used seal ring of the utility model is not limited to this single material of rubber certainly, its application area more can expand to oil sealing, relevant many sealing occasions such as envelope gas etc.New equipment also has long service life, many other advantages such as easy to loading and unloading.Thereby we can estimate that this new technology will increase a fresh content for technical field of sealing technology, are that society creates bigger economic benefit.

Claims (1)

1, a kind of RUBBER O RunddichtringO does not have the seal arrangement of decrement, the RUBBER O RunddichtringO of cross section diameter Φ=D is contained in the dark L that is, wide is to seal in the mated pair groove of B, it is characterized in that this Sealing is not had mechanical decrement, i.e. size: L＞D, B＞D.