SU857793A1

SU857793A1 - Test-bed for end face seal testing

Info

Publication number: SU857793A1
Application number: SU792811343A
Authority: SU
Inventors: Рамиз Хыдыр Оглы Рагимов; Борис Семенович Захаров; Анатолий Армаисович Петросянц; Зияддин Юсиф Оглы Алиев
Priority date: 1979-08-16
Filing date: 1979-08-16
Publication date: 1981-08-23

Description

(54) СТЕНД ДЛЯ ИСПЫТАНИЙ ТОРЦОВЫХ УПЛОТНЕНИЙ(54) MECHANICAL SEAL TEST BENCH

Изобретение относитс к уплотнительной технике и может быть использовано дл исследовани торцовых уплотнений центробежных насосов и химических аппаратов.The invention relates to a sealing technique and can be used to study the mechanical seals of centrifugal pumps and chemical apparatus.

Известен стенд пд определени момента трени в торцовых уплотнени х вращающихс валов, содержащий установленный в подшил- , никах полый цилиндрический корпус, в котором размещаютс неподвижные элементы исследуемых уплотнений, и расположенный соссно с корпусом вал и жестко св занна с ним цилиндрическа гильза, установленна в кортусе с радиальными осевыми зазоралш 1.A stand for determining the moment of friction in the mechanical seals of rotating shafts is known, which contains a hollow cylindrical body mounted in hemmedicals, in which the fixed elements of the seals under investigation are located, and a shaft rigidly connected to it and mounted in a cortus with radial axial clearance 1.

Недостатками зтого стеида вл етс то, что две пары торцовых уплотнений, расположенные консольно относительно опоры вала, привод т к разным услови м работы уплотнений, при этом работа одной пары уплотнени зависит от другой, а сборка испытательной головки сложна . Кроме того, эта конструкци ж позвол ет проводить испытани торцовых уплотнений в режимах, приближенных к эксплуатационным.The disadvantages of this steid are that two pairs of mechanical seals, which are cantilevered relative to the shaft bearing, lead to different conditions for the seals to work, while the work of one pair of seals depends on the other, and the assembly of the test head is complicated. In addition, this design allows testing mechanical seals in modes that are close to operational ones.

Известен также стенд дл нсследовашш торцовых уплотнений вращающихс валов, содержащий две рабочие камеры корпусов уплотнений , сообщающихс между собой и заполненных рабочей средой, размещенных в них устройств дл креплени одной пары испытуемых уплотнений в каждой камере к неподвижным и вращакниимс держател м, привод дл вращени вала, нагружающее устройство и контрольно-измерительную аппаратуру 2.Also known is a stand for investigating the mechanical seals of rotating shafts, which contains two working chambers of seal housings, communicating with each other and filled with working medium, devices placed in them for fastening one pair of test seals in each chamber to stationary and rotating holders, rotating the shaft, loading device and instrumentation 2.

Недостатком этого стенда вл етс то, что момент трени в испытуемых торцовых уплот10 нени х измер етс косвенно, т.е. при помощи тарированного двигател , невозможность измерени в зкого трени и охлаждени уплотнений, что приводит к малой достоверности результатов .The disadvantage of this test bench is that the moment of friction in the tested mechanical seals is measured indirectly, i.e. using a calibrated motor, the inability to measure viscous friction and cooling of the seals, which leads to low reliability of the results.

ISIS

Цель изобретени - псшьпиенне точности эксперимента н обеспечение идентичных условий работы двух пар испытуемых торцовых уплотданий , что штьоижт достоверность результатов.The purpose of the invention is to ensure the accuracy of the experiment and to ensure identical working conditions for two pairs of test mechanical seals, which ensures the reliability of the results.

2020

Claims

This goal is achieved by having an actuator for rotating the shaft with the seal housing through additional rolling bearings of the seal housings. In addition, two additional fixed rings with outer diameters of the ends smaller than the inner diameter of the sealing ring were made to measure viscous trash. Ne figs. 1 shows a stand, general view; in fig. 2 - connection of the test head with a loading device; in fig. 3 - plug for replacing the fixed ring; in fig. 4, a sealing assembly with an additional stationary ring for measuring viscous friction, section A-A in FIG. 1. The test bench contains a test head 1 mounted on the frame 2 using ball bearings 3 and 4, which are mounted on the bearing housing 5. The seal housings 6 are rigidly connected to the test head housing 7 1. The seal housings 6 communicate with each other by tube 8. Rotation 9 is provided using an electric motor 10 and a V-belt transmission 11. The loading device consists of a cylinder 12, pressurized with compressed gas, a differential cylinder 13 and a pressure gauge 14. The test mechanical seal consists of a fixed 15 and a rotating with 16 rings pressed against each other by a spring 17 of compression. To measure the friction moment at the junction of the test head 1 with a loading device, the fixed rings are replaced by two plugs 18, and for measuring the friction two additional fixed rings 19 are provided with outer diameters smaller than the sealing rings of the rotating sealing rings 16 . Through holes 20 for supplying coolant are provided in the seal housings. The stand work is as follows. With the help of a loaded device, the required pressure is created in the working chambers of the stand and the moment of friction in the sealing pair is measured using a strain gauge glued to the steel beam and receives the load of the lever (not shown) associated with the test head. To measure the frictional moment at the junction of the test head 1 with the loading device, the fixed rings are replaced by two plugs 18, which prevents the passage of the densified medium into the working chambers. Measuring apparatus 34 (not shown) measures the frictional moment in the sealing rings of the sealing connections of the test head with the unloading device. To measure viscous friction, the stationary rings 15 are replaced by two additional rings 19 with outer diameters equal to the inner diameter of the sealing strip of the rotating sealing track. The gap between the ends of the additional stationary and rotating rings is 1-2 mm. With the help of a loading device, a sealing medium under a pressure of 0.1-0.2 MPa is fed to the specified gap, the measuring equipment is turned on once and twice, and the magnitude of the viscous track T is measured. The invention allows to BREAK the accuracy of the measurement of the friction torque in the mechanical seals and ensures identical conditions of operation of two pairs of test ends; 1x compaction; over a wide range of variations in the operating pressure of the compacted medium. Claim 1. A bench for testing mechanical seals comprising a frame with two rigidly fixed seals on it, interconnected and filled with a sealable medium, a device for fastening the tested seals to fixed and rotating holders, a drive for rotating the shaft, a loading device and instrumentation equipment, characterized in that, in order to increase the reliability of the test results, the drive for rotating the shaft communicates with the seal housing through Additional supports cheni, located between the chambers of the seals.

2. A stand according to claim 1, that is, with the fact that for the measurement of viscous friction, two additional fixed rings with outer diameters of the ends, smaller than the inner diameter of the rotating rotary ring, are introduced. Sources of information taken into account when examining 1. USSR author's certificate No. 275486, cl. G 01.N 19/02, 1967. 2, Mayer E. End seals. M., Maschyshustroenie, 1978, p. 45 (prototype).