SU1464098A2 - Apparatus for testing hand-operated machines with turbine motors - Google Patents

Description

UNION OF ADVISORS

SOCIALIST

REPUBLIC „„ SU. ,,, 1464098 A 2

STATE NOMINATION

BY INVENTIONS AND DISCOVERIES UNDER THE GNNT OF THE USSR

DESCRIPTION OF THE INVENTION

S A SECOND CERTIFICATE

ALL-Union

PATENTED GKK: --- CESIA E · (61) 1153253 (21) 4250527 / 25-06 (22) 05.27.87 (46) 07.0.3.89. Bull. No. 9 (71) Kuibyshev Aviation Institute named after Acad. S.P. Queen (72) S.D. Gritsay, V.N. Matveev,

N.F. Musatkin, I.Yu. Shanin and A.M.She-? Vyrin (53) 621.438 (088.8) (56) USSR Copyright Certificate No. 1153253, cl. G 01 M 15/00, 1983.

(54) DEVICE FOR TESTING HAND MACHINES WITH A TURBINE ENGINE (57) The aim of the invention is to increase the test performance by expanding the range of stepless regulation of the braking torque. The device further comprises an accelerating centrifugal turbine stage, a nozzle apparatus (CA) 12 and an impeller (RK) 11 of which are installed in parallel with the CA 3 and RK 2 of the centrifugal turbine, and a ring. the Central channel 13 of the air supply to the turbine stage, placed coaxially to the pipe 4 of the air supply to the centrifugal turbine. Compressed air is supplied to the test machine 7 with a turbine engine, which drives the PJC 2 through the shaft 6. With an increased number of revolutions, compressed air is also supplied to the pipe 4, which, flowing through CA 3 and PK 2, creates a torque on the drum 5, the braking engine of the tested machine 7. With a decrease in the number of engine revolutions, compressed air is supplied to the channel 13 into the accelerating centrifugal turbine stage. 1 ill.

SU 1464098 A 2

The invention relates to tests of small engines, in particular turbines of hand-held machines, and is an improvement of the invention by ed. St. No. 1153253.

The purpose of the invention is to increase the test performance by expanding the range of stepless regulation of the braking torque.

The drawing shows a device, General view.

The device comprises a mounting plate 1, placed on. it is a brake in the form of an impeller 2 of a centrifugal turbine, a nozzle apparatus 3, which is rigidly fixed to a nozzle 4, which is simultaneously one of the pins of the drum 5. The impeller 2 is mounted on a shaft 6, kinematically connected to the test machine 7, also mounted on plate 1, Scales 8 with weights are installed on drum 5, on the nozzle 4 there is a tachometer 9 from one end, and a moment sensor 25 10 from the other end. The device further comprises an accelerating centrifugal turbine stage, an impeller 11 and a nozzle apparatus 12 which are installed parallel to the impeller 30 2 and the nozzle apparatus 3, and an annular channel 13 for supplying air to the accelerating centrifugal turbine stage, placed coaxially to the air supply pipe 4. The drum 5 is equipped with windows 14, the axes of which are parallel to the axis of the shaft 6.

The device operates as follows.

Compressed air is supplied to the turbocharged engine 7 being tested, which, through the shaft 6, spins the impeller 2, the revolutions of which are measured by the tachometer 9. With an increased number of revolutions of 45 nozzle 4, compressed air is also supplied, which flows through the nozzle apparatus 3 and the impeller 2 creates a moment of rotation on the drum 5, proportional to the braking moment created by the impeller 2 and braking the engine of the test machine 7. With a reduced number of revolutions of the engine of the test machine, the compressed air p is fed into the channel 13 and further to the nozzle apparatus 12 and the impeller 11, which transmits an additional torque to the shaft 6, increasing the number of revolutions 15 of the engine of the tested machine 7.

At the same time, the moment sensor 10 measures the moment · of rotation created by the nozzle apparatus 12 and is proportional to the additional moment of rotation transmitted to the shaft 6 · by the impeller 11.

From the measured values of torque and engine speed of the tested machine, the effective power of this engine is calculated

Claims (1)

Claim A device for testing manual machines with a turbine engine according to auth. No. 1153253, characterized in that, in order to increase the test performance by expanding the range of stepless regulation of the braking torque, the device further comprises an accelerating centrifugal turbine stage, the nozzle apparatus and the impeller of which are installed parallel to the nozzle apparatus and the impeller of the centrifugal turbine, and an annular air supply channel to the turbine stage, placed coaxially with the air supply pipe to the centrifugal turbine.