JPH0323551Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a self-propelled dynamometer verification device.

Conventionally, when measuring the thrust and torque of a model in an experimental water tank, it is necessary to verify the self-propelled dynamometer used for measurement in advance, so it is necessary to apply a known thrust and torque load to the shaft of the self-propelled dynamometer. Must be.

First, as shown in the side view of FIG. Weight holder 07, dynamometer shaft 08, punch 09,
Consisting of a trunnion 010, a support shaft 011, etc., the punch 09 is pivotally connected to the L-shaped lever 06 via the trunnion 010, and the L-shaped lever 06 is connected to the support shaft 011.
It is pivotally connected to the thrust verification device frame 05 via.

Next, the conventional torque verification device includes a dynamometer shaft 08, a generator 012, an input shaft side casing receiver 0, as shown in the side view of FIG.
13. Consists of end side casing receiver 014, torque lever 015, weight holder 016, etc., and generator 01
2 is pivotally supported by an input shaft side casing receiver 013 and a terminal side casing receiver 014, and one torque lever 015 is attached to the left and right sides of the casing of the generator 012.

In such a device, in the case of thrust verification, when an arbitrary thrust load is applied to the self-propelled dynamometer 03 in Fig. 1 and a weight is placed on the thrust weight holder 07 while rotating the electric motor 01, the L-shaped lever 06
is activated, and the punch 09 is activated via the trunnion 010.
By pushing the dynamometer shaft 08 of the self-propelled dynamometer 03, an arbitrary thrust load can be applied.

In addition, in the case of torque verification, apply an arbitrary torque load to the self-propelled dynamometer 03 in Figures 2 and 3, and
When a field current is passed through the generator 012 while rotating the generator 012 at a constant rotation speed, a voltage of V=Kaφn is generated.

However, V: voltage, Ka: motor constant, n:
Rotation speed, φ: Magnetic flux Therefore, when voltage V is consumed by resistor R, armature current Ia = V/R flows through the armature of generator 012, and due to this armature current Ia, T = KaφIa where T : Torque is generated, and a reaction force is generated on the casing of the generator 012, so this reaction force is balanced by placing a weight on the weight holder 016 suspended from the torque lever 015 fixed to the casing, and the following formula is obtained. Any torque shown in can be applied.

Q=W・L Where, Q: Torque (Kgm), W: Weight placed on the hook (Kg), L: Distance from the center of the hook to the center of the generator.

However, such a device has the disadvantage that simultaneous verification of thrust and torque is not possible, and the frictional torque of the bearing is large, resulting in reduced accuracy.

The present invention was proposed in view of the above circumstances, and is a highly accurate method that can detect the interference of the self-propelled dynamometer with the thrust due to the torque and the interference with the thrust due to the torque by applying thrust and torque loads at the same time. The purpose is to provide a self-propelled dynamometer verification device.

To this end, the present invention provides a self-propelled dynamometer verification device that verifies the torque and thrust of a rotating shaft, which is equipped with a generator for applying a torque load and a balance weight for applying a thrust load. A generator whose both ends are supported coaxially and slidably in the circumferential direction and the axial direction via air bearings, and an excitation current is supplied to the generator and the generator is A plurality of mercury contact devices for extracting output current from the generator, and a balance weight for applying a thrust load, one end of which is pivotally attached to the generator shaft via an air bearing that regulates displacement of the generator shaft in the axial direction. It is characterized by being equipped with a weight.

An embodiment of the present invention will be explained with reference to the drawings.
FIG. 4 is a side view thereof, and FIG. 5 is a partially enlarged view showing the thrust detection section of FIG. 4.

In the above diagram, 1 is the electric motor, 2 is the installation stand, 3 is the self-propelled dynamometer, 4 is the shaft coupling, 5 is the thrust load verification device frame, 6 is the balance lever, 7 is the thrust weight mounted, and 8 is the dynamometer shaft. , 15 is a torque lever, 1
6 is a weight mounting, 18 is a bearing inner ring, 19 is a bearing outer ring, 20 is a generator, 20a is an armature, 20b is a casing, 20c is a bearing A, 20d is a bearing B, 2
0e is the generator shaft, 21 is the mercury reservoir, 22 is the mercury,
23 is a generator electrode, 24 is a power cord, the casing 20b of the generator 20 is axially supported by an air bearing A33 and an air bearing B34 that allow displacement in the axial direction, and the generator shaft 20e has a power cord that does not allow displacement in the axial direction. The unacceptable air bearing C35 is installed, the bearing inner ring 18 of the air bearing C35 is fixed to the generator shaft 20e, the bearing outer ring 19 is connected to the balance lever 6 via the shaft support mechanism A30, and the balance lever 6 is connected to the shaft support mechanism B31. Thrust verification device frame 5 through
is supported by

The mercury reservoir 21 is connected to the power cord 24, and the mercury 22 and the generator electrode 23 are connected to the generator 2.
Supply power to 0.

Two left and right torque levers 15 are attached to the casing 20b of the generator 20, and a weight mount 16 is suspended from these.

In such a structure, in order to test the thrust and torque of the self-propelled dynamometer, the electric motor 1 rotates the self-propelled dynamometer 3 and the generator 20 at a constant rotation speed.

In the case of thrust verification, when a weight is placed on the thrust weight holder 7, the balance lever 6 and the air bearing C
An axial force is applied to the generator shaft 20e via the generator shaft 35, and this force is transmitted to the dynamometer shaft 8 of the self-propelled dynamometer 3, so that an arbitrary thrust load can be applied to the self-propelled dynamometer 3.

In addition, in the case of torque verification, when a field current is passed through the generator 20, a magnetic flux φ is generated, and V=Ka・φ・
Since a voltage of n is generated in the generator 20, if this voltage V is consumed by the resistor R, the armature current Ia=
V/R flows, and this armature current Ia causes torque T
=Ka・φ・Ia is generated, which gives a reaction force to the casing 20b of the generator 20.

Therefore, by balancing this reaction force by placing a weight on the weight mount 16 suspended from the torque lever 15, an arbitrary torque can be applied to the self-propelled dynamometer 3 using the formula below.
can be given to

Arbitrary torque Q=W·L Q: Torque (Kgm) W: Weight amount (Kg) L: Torque lever length (m) According to such a structure, the following effects can be achieved.

(1) Thrust and torque can be verified simultaneously.

(2) Air bearings minimize bearing loss and improve verification accuracy.

(3) By using mercury contacts, the negative effects of power supply cables can be eliminated.

In short, according to the present invention, in a self-propelled dynamometer verification device that verifies the torque and thrust of a rotating shaft, which is equipped with a generator for adding a torque load and a balance weight for adding a thrust load, both ends of the casing generate electricity. a generator whose both ends of the machine shaft are each coaxially supported by an internal shaft, and which are each slidably supported in the circumferential direction and the axial direction via air bearings;
A plurality of mercury contact devices for supplying excitation current to the generator and extracting output current from the generator, and an air bearing having one end attached to the generator shaft for regulating displacement of the generator shaft in the axial direction. The present invention is industrially extremely useful because it provides a high-performance self-propelled dynamometer verification device by providing a balance weight for applying a thrust load which is pivotally attached to the shaft.

[Brief explanation of drawings]

FIG. 1 is a side view showing a known thrust verification device for a self-propelled dynamometer, FIG. 2 is a side view showing a torque verification device for a known torque verification device for a self-propelled dynamometer, and FIG.
These figures are a plan view of FIG. 2, FIG. 4 is a side view showing an embodiment of the present invention, and FIG. 5 is a partially enlarged view showing the thrust detection section of FIG. 4. 1... Electric motor, 2... Installation stand, 3... Self-propelled dynamometer, 4... Shaft coupling, 5... Thrust load verification device frame, 6... Balance lever, 7... Thrust weight mounting, 8... ...Dynamometer shaft, 15...Torque lever, 16...Weight mounting, 18...Bearing inner ring, 19
... Bearing outer ring, 20 ... Generator, 20a ... Armature, 20b ... Casing, 20c ... Bearing A,
20d...bearing B, 20e...generator shaft, 21...
... Mercury reservoir, 22 ... Mercury, 23 ... Generator electrode, 24 ... Power cord, 30 ... Pivotal support mechanism A,
31... Pivotal support mechanism B, 33... Air bearing A, 34
...Air bearing B, 35...Air bearing C.

Claims (1)

[Scope of utility model registration request] In a self-propelled dynamometer verification device that verifies the torque and thrust of a rotating shaft, which is equipped with a generator for adding a torque load and a balance weight for adding a thrust load, both ends of the casing coaxially connect both ends of the generator shaft. a generator that is internally supported and slidably supported in the circumferential direction and axial direction through air bearings, respectively; supply of excitation current to the generator; and extraction of output current from the generator; and a balance weight for applying a thrust load, one end of which is pivotally attached to the generator shaft via an air bearing that regulates displacement in the axial direction. Aviation dynamometer verification device.