JPH0632809Y2 - Lubricating oil detector for continuous centrifuge - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention is a lubricating oil detection device for a continuous centrifugal separator using a cyclogear device, which easily detects an appropriate amount of lubricating oil in the cyclogear device from the outside. It relates to a device adapted to do so.

[Conventional technology]

In recent years, in order to save labor in solid-liquid separation processes in various industries, filtration type continuous centrifuges, for example, those shown in JP-B-59-8756 and JP-B-63-2108 are widely used. These are high speed, continuous, unmanned, fully automatic centrifuges.

In this type of cone-type continuous centrifuge, as shown in FIG. 2, since the basket and the screw are driven at different rotational speeds and by the same motor, a cyclo gear device is used, and this cyclo gear device is used. The high-speed shaft of the gear device and the basket shaft connected to it (the high-speed shaft and the basket shaft are fixedly connected) are made rotatable by the bearing of the main body frame, and the main body frame is sealed to lubricate the cyclo gear device. Lubricating oil is filled in a required amount separately from the oil to lubricate the bearing.

[Problems to be solved by the device]

While the separator is in operation, the operator periodically patrols the separator to maintain the separator.However, the inside of the cyclogear device has a built-in bearing that rotates at high speed, making it difficult to install an abnormality detection device. There is no other choice but to rely on the audiovisual detection judgment of the audiovisual sense, and therefore the judgment of normality / abnormality is insufficient, the leakage of the lubricating oil enclosed in the cyclogear device is not noticed, the lubrication of the bearing is insufficient, and the temperature rises. There is a problem that the bearing and the gear are burnt out because the lubricating oil becomes empty at the end of the progress and the lubrication becomes impossible.

An object of the present invention is to provide a lubricating oil detecting device for a continuous centrifugal separator, which makes it possible to detect an appropriate amount and normal operation of lubricating oil in a cyclogear device from the outside easily and reliably.

[Means for Solving the Problems]

The present invention has been made in order to achieve the above-mentioned object, and detects the lubricating oil of a continuous centrifuge driven by the same motor while maintaining a constant rotation difference between a cone-shaped basket and a screw by a cyclo gear device. In the device,
A through hole is provided in the low-speed shaft center of the lubricating oil-filled cyclogear device, an impeller is provided at the inner end of the low-speed shaft, and an orifice communicating with the through-hole is provided. The gist is that a pressure gauge for detecting the pressure of the lubricating oil in the cyclogear device is provided.

[Action]

The impeller attached to the low-speed shaft guides the lubricating oil enclosed in the cyclogear device to the outside of the machine to instruct the pressure gauge to indicate the hydraulic pressure, and confirms and determines the appropriateness of the lubricating oil amount.

〔Example〕

 The present invention will be described below based on the illustrated embodiment.

In the figure, reference numeral 1 denotes a cone-shaped basket having a predetermined size according to the continuous centrifugal separation capacity, which has an inclination angle of about 20 ° with respect to the horizontal axis of the separator. In addition to being installed in the separator body so as to rotate at high speed, a screw 2 is installed in the basket 1. The screw 2 rotates slightly faster than the basket 1, and discharges the solid matter separated and attached to the screen surface attached to the inner peripheral surface of the basket toward the discharge port. A liquid supply pipe 3 is arranged at the inner end of the center of the screw 2 so that slurry or the like is supplied from the outside, and the slurry supplied from the pipe 3 enters the basket from the slurry supply port at the inner end of the screw. When being guided to the peripheral surface portion and conveyed along the inner peripheral surface of the basket from the inner end portion to the outer end portion, desired separation and dehydration are performed.

The basket 1 and the screw 2 are fixed to the basket shaft 41 and the screw shaft 42 of the cyclo gear device 4 and are driven at different speeds as described above.

The cyclogear device 4 is housed in a main body frame 5 filled and sealed with lubricating oil, and is rotatably supported by bearings 6 and 6,
The lubricating oil in the body frame is supplied to these bearings 6 and 6,
Allow smooth rotation.

7 and 8 are the high speed shaft 43 and the low speed shaft 44 of the cyclo gear device.
It is driven by a motor with a pulley provided on the.

The first end is attached to the inner end of the low speed shaft 44 of the cyclo gear device 4.
As shown in FIG. 3, FIG. 3, and FIG. 4, an impeller 45 is provided, and orifices 46, 46 opening at two locations facing the outer peripheral surface of the impeller 45 are bored, and the orifices 46, 46 and the low speed shaft 44 are formed. Through the through hole 47 formed along the axis of the. This through hole 47 is used for the low speed shaft 4.
Open to the tip of No. 4 and use the rotary union 9
Is attached, an introduction pipe 10 is connected to the rotary union 9, and a pressure gauge 11 and a valve 12 are attached to the tip of the introduction pipe 10.
Attach. Further, an abnormality detector (not shown) for issuing an alarm or stopping the centrifuge may be provided.

In the case of the above configuration, the impeller fixed to the end of the low-speed shaft in the lubricating oil-sealed cyclogear device sucks a part of the lubricating oil in the cyclogear device by the rotation of the low-speed shaft, that is, the rotation of the impeller, Passing through the through hole 47 in the heart,
It is sent to the pressure gauge 12 via the rotary union 9, the introduction pipe 10 and the valve 11. Under normal conditions, the pressure gauge indicates the constant pressure of lubricating oil.

That is, according to Bernoulli's theorem H: Suction pressure of impeller m R: outer radius of impeller m r: inner radius of impeller mg: acceleration of gravity 9.8 m / sec ² Now, n = rotation speed of high speed shaft−rotation speed of low speed shaft = 1900−1050 = 850 r.pm R = 0.040 If m, r = 0.038m Becomes

That is, a pressure of 63 mmAq will rise, and the impeller of the above dimensions will be attached to the low speed shaft end in the cyclo gear,
As a result of the actual machine test at the low speed shaft, that is, the speed of the impeller: 1050 rpm, and the speed of the high speed shaft, 1900 rpm, a pressure measurement of 60 mmAq was achieved. It was confirmed that the theoretical value and the experimental value are almost the same.

Further, in this experimental test, a test was conducted to find out what happens when the amount of lubricating oil in the cyclogear device is reduced to 1/2 of the fixed amount. The result was that the pressure did not rise and was 0.

A test was also performed when the rotation speed was set to the same 1900 rpm for both the high speed axis and the low speed axis. As a result, the pressure did not rise and was 0 even if the amount of lubricating oil in the cyclogear device was constant.

[Effect of device]

According to the present invention, when the machine is continuously operated for a long period of time, if the installation bolts, etc. of the cyclogear device are loosened, or if the installation failure causes leakage of the lubricating oil enclosed in the cyclogear device, the amount of lubricating oil decreases Becomes empty) or when the V belt on the low speed shaft side comes off, each shaft (low speed shaft, high speed shaft, basket shaft, screw shaft) becomes the same rotation,
When such an abnormal state occurs, the pressure does not rise and becomes 0, so that it can be clearly distinguished from the normal state.

Therefore, by equipping the cone type centrifuge with the lubricating oil detecting device of the present invention, it is possible to easily confirm the properness of the amount of lubricating oil in the cyclogear device from the outside, and prevent the bearing from being burned due to unlubrication. You can Also, V
Problems such as slippage and disengagement due to belt damage can also be confirmed, which is advantageous in maintaining continuous operation of the machine.

[Brief description of drawings]

FIG. 1 is an enlarged explanatory view of a main part, FIG. 2 is a partially broken external view of a cone type continuous centrifugal separator, FIG. 3 is a detailed sectional view of an impeller in a cyclo gear, and FIG. 4 is a side surface of the impeller. It is a figure. 1 is a basket, 2 is a screw, 4 is a cyclogear device, 5 is a main body frame, 6 is a bearing, 9 is a rotary union, 10 is an inlet pipe, 11 is a pressure gauge, 12 is a valve, 44
Is a low speed shaft, 45 is an impeller, 46 is an orifice, and 47 is a through hole.

Claims (1)

[Scope of utility model registration request] 1. A lubricating oil detecting device for a continuous centrifugal separator in which both a cone type basket (1) and a screw (2) are driven by the same motor while maintaining a constant rotation difference by a cyclo gear device (4). In the impeller (45), a through hole (47) is provided in the low speed shaft center of the lubricating oil-filled type cyclo gear device (4), and an orifice (46) communicating with the through hole (47) is formed at the inner end of the low speed shaft. ) Provided, the rotary union (9), the introduction pipe (10) at the other end of the low speed shaft
A lubricating oil detecting device for a continuous centrifuge, comprising a pressure gauge (11) for detecting the pressure of lubricating oil in the cyclogear device via the.