CN2039370U - Test table for sealing device for revolving shaft - Google Patents

Abstract

The utility model relates to a test table for a high speed and high pressure sealing device for revolving shafts. The utility model is characterized in that the external extending parts at both sides of an output shaft (namely a high speed shaft) of a gear speed increasing mechanism are sealing test spindles which are in a double cantilever type. The high-pressure gas seal can be tested, the axial force is automatically balanced, and the utility model has the advantages of convenient seal, assembly and disassembly and compact structure. If the external ends of two spindles are respectively provided with an auxiliary bearing, the utility model becomes a four fulcrum type, which causes the critical rotating speed of the sealing test spindles to be high and the tested sealing size range to be big. In addition, the tested sealing disposal is flexible, and various sealing devices for revolving shafts can be tested. The utility model is an important method to research and develop high speed and high pressure sealing devices for revolving shafts.

Description

Test table for sealing device for revolving shaft

The utility model relates to the test stand of a kind of high speed, high pressure rotary shaft seal arrangement (hereinafter to be referred as sealing).

High speed in the known technology, high pressure rotary shaft are made up of motor, gear up mechanism, Testing institute and test instrument, instrument with the leakage test platform.One of its structural type is single swing arm type, i.e. the output shaft of gear up mechanism is connected with the main shaft of Testing institute by coupling or torsionmeter, and main shaft is the leakage test axle by protruding section of bearing; Another kind is the freely-supported beam type, i.e. the output shaft of gear up mechanism is connected with the main shaft of Testing institute by coupling or torsionmeter, is tested the sealing symmetry and is loaded between the two bearings.In these two kinds of forms, single swing arm type has simple in structure, seal simple load and unload characteristics, but the tested significant limitation that is sealed with, generally can only test the mechanical single seal that two cover symmetries are installed, can not test with liquid is the Double End gas seal of lubricating and cooling agent, because the test of sealing need add gas shield, produce very big axial force therefrom, general bearing can't be born.And the freely-supported beam type is owing to be the high-pressure medium chamber in the middle of the sealing that two cover symmetries are installed, so axial force can autobalance, but it is inconvenient to exist tested sealing to install and remove, and the main shaft span is big, so shortcoming such as critical speed of rotation is low.

The purpose of this utility model is to propose a kind of deficiency that overcomes in the known technology, and a kind of running shaft seal arrangement test stand is provided.

The utility model is achieved through the following technical solutions.

Running shaft is protruding by the bearing that is installed on the casing with the two ends of the output shaft of the gear up mechanism of leakage test platform, is integral with the main shaft of leakage test mechanism; In tank ends the mounting flange concentric with main shaft arranged, seal casinghousing or auxiliary axis bearing can be installed on it.

Two overhanging ends of the leakage test main shaft of test stand are bearing on the bearing of auxiliary axis bearing.

Description of drawings:

Fig. 1: running shaft leakage test platform double cantalever type sketch;

Fig. 2: running shaft leakage test platform four fulcrum type sketches.

1 is belt; 2 is small belt pulley; 3 are gear up mechanism; 4 is lower velocity shaft; 5 is gear; 6 is the middling speed axle; 7 and 8 is gear; 9 for high speed shaft be output shaft; 10 is gear; 11 and 12 is bearing; 13 and 14 is leakage test mechanism main shaft; 15 and 16 for being the double seals of lubricating and cooling agent with oil; 17 and 18 is the pressurized gas cover; 19 and 20 is the auxiliary axis bearing; 21 and 22 is auxiliary bearing; 23 and 24 is the high-pressure medium chamber; 25 and 26 is adpting flange.

Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail:

The double cantalever type test stand, it is through belt 1 by a stepless speed-change motor, the lower velocity shaft 4 of small belt pulley 2 driven gear speed increasing mechanisms 3, pass through gear 5 and 7 again, middling speed axle 6, gear 8 and 10 is realized three grades of speedups, its high speed shaft 9 is by bearing 11 and 12 supportings, its two ends output shaft is to be used for installing tested sealing on the main shaft 13 and 14 of leakage test mechanism, among Fig. 1 15 and 16 is to be the double mechanical seal of lubricating and cooling agent with oil, and 17 and 18 is that the required pressurized gas cover of test sealing is to be connected with 26 by casing adpting flange 25.In test, fill in the high- pressure medium chamber 23 and 24 with sealed gas, pressure can reach 20MPa, and the axial force that pressurized gas leakage test main shaft produces is because sealing 15 and 16 is symmetric arrangement, can autobalance, thereby be not subjected to the restriction of the bearing capacity of thrust-bearing.Sealing among Fig. 1 also can change mechanical single seal into, can be water, oil or other liquid in its high-pressure medium chamber 24 and 25.Being the mechanical single seal of gas lubrication if seal 15 and 16, also can be gas in the high- pressure medium chamber 23 and 24.

Fig. 2 is four fulcrum schemes of this test stand, and gear up mechanism part is identical with double cantalever type, in the end of Testing institute main shaft 13 and 14 two auxiliary bearings 21 and 22 is housed, and is bearing in respectively above the auxiliary axis bearing 19 and 20 that is connected with 27 with flange 25.This makes main shaft become hyperstatic four point supportings by two cantilever support, thereby can improve the critical speed of rotation of leakage test main shaft, also can strengthen the weight of sealing rotating ring simultaneously, enlarges the dimensional range of tested sealing.A tested sealing 15 is housed on the Testing institute main shaft 13 of Fig. 2, also can on the position of main shaft 14, adorns and seal 15 identical or different sealings as required and test simultaneously.Auxiliary bearing can be adorned 2 in addition, also can adorn 1 or one and also not adorn.

The utility model has the advantage of: have the mounting or dismounting sealing conveniently; Automatically balancing axial force; Test sealing main shaft critical speed height; Tested closure size scope is big; Tested close on testing stand arrangement flexible; The test platform structure compactness; Highly versatile is the important means of research and development high pressure, high-speed sealing. Its major parameter is:

Rotating speed 0-12000r/min

Tested O-ring circular velocity 0-150m/s

Tested sealing load 0-20MPa

Tested closure size scope 80mm-200mm

Claims (3)

1, a kind of running shaft seal arrangement test stand, form by motor, belt, belt pulley, gear up mechanism and test instrument, instrument, the two ends that it is characterized in that gear up mechanism output shaft are protruding by the bearing that is installed on the casing, be integral with the main shaft of leakage test mechanism, in tank ends the mounting flange concentric with main shaft arranged, on it seal casinghousing can be installed.

2, test stand according to claim 1 is characterized in that on the concentric flange of tank ends and main shaft the auxiliary axis bearing being housed.

3, test stand according to claim 2 is characterized in that two overhanging ends of leakage test main shaft are bearing on the bearing of auxiliary axis bearing.

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