JP5156070B2 - Control method of rotary snowplow and rotary snowplow - Google Patents

Description

The present invention relates to a rotary snowplow provided with an auger and a blower, and more particularly to a method for controlling a rotary snowplow and its rotary snowplow.

  The rotary snowplow has an auger at the front of the vehicle body and a blower behind the auger, and the auger rotates in a direction that is almost perpendicular to the traveling direction of the traveling vehicle with the axial direction being horizontal, cutting off the accumulated snow and feeding it to the blower. The blower is a centrifugal blade that becomes a rotating shaft substantially parallel to the traveling direction, and dissipates the snow cut by the auger together with the surrounding air flow by centrifugal force. The rotational force converted directly from the engine or hydraulic pressure is transmitted through the speed reducer, and the auger and blower are mechanically connected by gears and chains. Therefore, the rotation of the auger increases or decreases in proportion to the rotation speed of the blower. As a means for controlling the snow to be released by the operator, the operation is performed by changing the rotation speed of the blower, and the rotation of the auger is changed according to the rotation speed of the blower (for example, Patent Document 1 and Patent Document 2). ).

JP-A-10-96219 JP 2004-293071 A

  The rotary snowplow has a drive system for the auger and blower snow removal device and a drive system for the traveling device independently. However, since the auger and blower are driven by the same drive motor, the auger and the blower are driven during the snow removal operation. If different loads are applied to the blower, it will not be possible to remove snow efficiently.

  Therefore, it is conceivable to drive the auger and the blower in separate systems, but snow removal cannot be performed efficiently even if the auger and blower are simply driven in separate systems.

  In view of the above-described problems, an object of the present invention is to provide a rotary snow plow capable of improving the efficiency of snow removal work.

The invention according to claim 1 is a control method of a rotary snowplow provided with an auger that collects snow and a blower that dissipates snow, the rotational speed of the blower, the rotational speed of the auger, the load of the blower, The load of the auger is measured, the snow removal amount by the blower is calculated from the rotation speed and load measurement value of the blower, and the snow transported to the blower by the auger from the rotation speed and load measurement value of the auger Calculating the amount, comparing the snow removal amount and the transport amount , setting a target auger rotational speed of the auger at which the transport amount is equal to the snow removal amount, and setting the target auger rotational speed to be the target auger rotational speed. It is characterized by controlling rotation .

The invention according to claim 2 is characterized in that the auger consumption output is reduced by controlling the rotation of the auger so as to be the target auger rotation speed , and the reduced amount is used for the blower consumption output. And

According to a third aspect of the present invention, there is provided a rotary snowplow provided with an auger that collects snow and a blower that dissipates snow, the rotational speed of the blower, the rotational speed of the auger, the load of the blower, Measure the load, calculate the amount of snow removal by the blower from the rotation speed and load measurement value of the blower, and calculate the amount of snow transported to the blower by the auger from the rotation speed and load measurement value of the auger Then, the snow removal amount is compared with the transport amount, a target auger rotational speed of the auger where the transport amount is equal to the snow removal amount is set, and the rotation of the auger is controlled so as to be the target auger rotational speed. It is characterized by doing.

  According to the configuration of claim 1 of the present invention, efficient snow removal can be performed by calculating the amount of snow removal by the blower.

According to the configuration of claim 1 of the present invention, it is possible to perform efficient snow removal by calculating the amount of snow transported by the auger.

Further, according to the first aspect of the present invention, by calculating the target auger rotational speed of the auger corresponding to snow quantity of the blower, it is possible to improve the snow removal efficiency.

Moreover, according to the structure of Claim 2 of this invention, the output of a motor | power_engine can be distributed efficiently and snow removal efficiency can be improved.

Moreover, according to the structure of Claim 3 of this invention, a rotary snowplow with high snow removal efficiency is obtained.

It is a power transmission system diagram of the rotary snowplow showing Example 1 of this example. FIG. 2A is a front view, and FIG. 2B is a side view. It is a block diagram of a control method same as the above. It is a block diagram of the other control method same as the above. It is a graph which shows the relationship between a snow removal amount and a blower rotation speed, a conveyance amount and an auger rotation speed, and a snow removal amount and a blower rotation speed as above. It is a graph which shows the relationship between an auger rotation speed and an output same as the above. It is a graph which shows the relationship between blower consumption energy and auger rotation speed same as the above. FIG. 6 is a graph showing the relationship between the blower consumption output and the amount of snow removal. It is a graph which shows the relationship between an auger rotation speed and an auger consumption output same as the above. It is a perspective view of a display same as the above.

  Hereinafter, Embodiment 1 of the rotary snowplow of the present invention will be described with reference to the drawings.

  Focusing on the consumption output of the auger and blower, as shown in FIG. 5 and the like, the consumption output of both the auger and blower increases as the rotational speed increases. Further, as for the amount of processed snow, the inventor has found from experience in the past that the “snow removal amount” representing the amount of processed snow decreases as the rotation of the blower increases. That is, as shown in the graph of blower rotation speed and snow removal amount in FIG. 5, when sending heavy snow with a blower unlike gas, if the rotation speed becomes higher than a certain level even if the rotation speed is increased, the output of the prime mover ( The amount of snow removal will decrease because horsepower will not catch up. On the contrary, in the case of an auger, since the snow is scraped along the spiral shape of the screw ribbon, the faster the rotation, the greater the amount of snow handled “conveyed”.

  In view of this, the present invention provides a method for controlling the rotational speed at which the optimal “conveyance amount” of the auger can be obtained in accordance with the “snow removal amount” that changes depending on the rotational speed of the blower, and is intended to save energy in the rotary snow removal device. is there.

  In the present invention, the blower and the auger drive devices are independently driven, and a sensor that can detect rotation information such as the rotation speed and load information such as the load amount is installed. An operator capable of calculating information from each sensor and outputting a signal to the control device of the auger rotating device is prepared. The operator converts each sensor signal into a blower load, a blower rotation speed, an auger load, and an auger rotation speed. Then, calculate the blower consumption output and the “snow removal amount”, calculate the optimum auger rotation speed from the “conveyance amount” required for the “snow removal amount” and the auger load, and output the signal to the control device of the auger rotation device In order to achieve energy saving.

  Specifically, as shown in FIGS. 1 to 10, a rotary snowplow 1 that is a snow removal device includes an auger 2 that is rotatable on a horizontal axis and a blower 3 that has a rotary shaft 3 </ b> A parallel to the traveling direction at the back thereof. To do.

  The accumulated snow is scraped by the auger 2 and conveyed to the blower 3 at the back of the center by the screw ribbon 2A of the auger 2. Thereafter, the snow is discharged together with the air flow by the rotating blower 3 and thrown from the chute 5 through the blower duct 4.

The rotary snowplow 1 is equipped with a hydraulic motor 2B as an example of a driving means of the auger 2, a variable displacement hydraulic pump 2C as a rotation control means, and by controlling the flow rate from the variable displacement hydraulic pump 2C, The rotational speed of the hydraulic motor 2B is controlled. A proximity sensor is provided as an auger rotation sensor for detecting the rotation of the auger 2, and a rotation sensor 6 for detecting a crest of a rotating gear is used as the proximity sensor, and an auger load sensor for detecting a load on the auger 2 includes A pressure gauge 7 is used. The pressure gauge 7 is provided in the hydraulic motor 2B, measures the pressure of the hydraulic motor 2B, and calculates the auger load from the pressure and the capacity of the known hydraulic motor 2B. it can.

  As an example of the drive means of the blower 3, a mechanical drive that transmits the rotational force from the in-vehicle motor 8 through the drive shafts 9 and 11 is provided, and the transmission 10 is provided between the drive shafts 9 and 11. A speed reducer 12 is provided between the drive shaft 11 and the rotating shaft 3 </ b> A of the blower 3. Further, as a blower rotation sensor for detecting the rotation of the blower 3, a rotation sensor 8 </ b> A (gear number detection type) for detecting the rotation of the prime mover 8 is used, and a distortion type torque mounted on the drive shaft 11 as a blower load sensor. A total of 11A is used.

Further, a traveling hydraulic motor 21 is provided as an example of a traveling drive unit of the rotary snowplow 1, and a transmission 23 is provided between the traveling hydraulic motor 21 and the wheels 22. Further, the traveling speed of the rotary snowplow 1 is detected by a vehicle-mounted speed detecting means, and a pressure gauge 24 is used as a traveling load sensor for detecting a traveling load by the wheels 22. It is provided in the hydraulic motor 21, the pressure of the traveling hydraulic motor 21 is measured, and the traveling load can be calculated from this pressure and the known capacity of the traveling hydraulic motor 21.

  In addition, the driving force of the auger 2, the blower 3, and the traveling apparatus uses a common single prime mover 8 as a power source.

  Next, an example of the control method of the rotary snowplow 1 of the present invention will be described.

Blower consumption output calculation method (1) In relation to the blower 3, the blower consumption output Eb is calculated from the input information of the blower load Fb and the blower rotational speed Nb. When the blower load Fb obtained by the torque meter 11A is a value expressed in units of couple [Nm] and the blower rotation speed [sec-1] obtained by the rotation sensor 6, the calculation formula is as follows: 1 can be represented. The blower rotational speed [sec-1] is the rotational speed in 1 second.

但し、ｋｂは係数である。
（１−１）ブロワ負荷Ｆｂが測定できない場合について補足説明する。前記オーガ２に係り、オーガ負荷Ｆａとオーガ回転数Ｎａの入力情報から、オーガ消費出力Ｅａを算出する。前記圧力計７により得られたオーガ圧力Ｐａが圧力［ＭＰａ］、前記回転センサ６により得られたオーガ回転数Ｎａが［sec-1］の単位で表される値の時、計算式は下記の数２で表すことができる。

However, kb is a coefficient.
(1-1) A supplementary explanation will be given for the case where the blower load Fb cannot be measured. In relation to the auger 2, the auger consumption output Ea is calculated from the input information of the auger load Fa and the auger rotational speed Na. When the auger pressure Pa obtained by the pressure gauge 7 is a pressure [MPa] and the auger rotational speed Na obtained by the rotation sensor 6 is a value expressed in units of [sec-1], the calculation formula is as follows. This can be expressed by Equation 2.

但し、Ｆａ＝Ｐａ×ｑ／２π、ｑは前記油圧モータ２Ｂの吐き出し容量、ｋａは係数である。
（１−２）走行負荷Ｆｄと走行速度Ｎｄの入力情報から、走行消費出力Ｅｄを算出する。前記圧力計２４から得られた走行圧力Ｐｄが圧力［ＭＰａ］、前記速度検出手段により得られた走行速度Ｎｄが［ｍ／s］の単位で表される値の時、計算式は下記の数３で表すことができる。

However, Fa = Pa × q / 2π, q is the discharge capacity of the hydraulic motor 2B, and ka is a coefficient.
(1-2) The travel consumption output Ed is calculated from the input information of the travel load Fd and the travel speed Nd. When the running pressure Pd obtained from the pressure gauge 24 is a pressure [MPa] and the running speed Nd obtained by the speed detecting means is a value expressed in units of [m / s], the calculation formula is as follows. 3 can be expressed.

但し、Ｆｄ＝Ｐｄ×ｑ×ｉ／２πＲ、ｑは走行油圧モータ２１の吐き出し容量、ｉは前記変速機２３による走行油圧モータ２１と車輪２２の回転のギヤ比、Ｒは車輪２２の半径［ｍ］、ｋｄは係数である。
（１−３）ロータリ除雪車１を駆動するエンジンなど原動機８の原動力Ｅ［ｋＷ］が分かれば、各装置で消費される出力の総和は原動力Ｅと等しいから、下記の数４で得られる。

However, Fd = Pd × q × i / 2πR, q is a discharge capacity of the traveling hydraulic motor 21, i is a gear ratio of rotation of the traveling hydraulic motor 21 and the wheel 22 by the transmission 23, and R is a radius of the wheel 22 [m ], Kd is a coefficient.
(1-3) If the motive power E [kW] of the prime mover 8 such as the engine that drives the rotary snowplow 1 is known, the sum of the outputs consumed by each device is equal to the motive power E.

但し、αはロータリ除雪車１のその他の消費出力で一定値としてとらえることができる。
式を変形して、ブロワ消費出力Ｅｂを下記の数５で求めることができる。

However, (alpha) can be taken as a constant value with the other consumption output of the rotary snowplow 1. FIG.
By changing the equation, the blower consumption output Eb can be obtained by the following equation (5).

（２）ブロワ消費出力Ｅｂはブロワ３単体が回転する時に生じる慣性などによるその他の出力Ｅｂ0と負荷に応じた実消費出力Ｅｂ´の和として捉えることができる。その他の出力Ｅｂ0は回転数に依存するから、予め空転時に測定をして、定数化しておく。

(2) The blower consumption output Eb can be regarded as the sum of other output Eb0 due to inertia generated when the blower 3 alone rotates and the actual consumption output Eb ′ according to the load. Since the other output Eb0 depends on the rotational speed, it is measured in advance during idling and is made constant.

ここで、その他の出力Ｅｂ0はブロワ回転数Ｎｂの二乗に比例（Ｅｂ0∝Ｎｂ2）する。
ブロワの「除雪量」の概算方法
（３）実ブロワ消費出力Ｅｂ´と除雪量Ｑは同じブロワ回転数Ｎｂの条件下で比例関係にあることがわかっているから、除雪量Ｑを下記の数７から算出できる。

Here, the other output Eb0 is proportional to the square of the blower speed Nb (Eb0∝Nb2).
(3) The actual blower consumption output Eb ′ and the snow removal amount Q are known to have a proportional relationship under the condition of the same blower rotational speed Nb. 7 can be calculated.

但し、ｋｑはブロワ形状による係数であり、１／Ｎｂに比例する関数である。
オーガの「搬送量」の概算方法
（４）除雪量Ｑに必要なオーガ搬送量Ｑ´はＱ以上の量であればよいから、Ｑ´＝Ｑとして、下記の搬送量に係る数８から目標オーガ回転数Ｎｉを求める。

However, kq is a coefficient according to the blower shape and is a function proportional to 1 / Nb.
Approximate method of auger “carrying amount” (4) The auger carrying amount Q ′ required for the snow removal amount Q may be an amount equal to or larger than Q. Obtain the auger speed Ni.

但し、ｋｃはオーガ形状とオーガ負荷Ｆａにより決定される係数である。

However, kc is a coefficient determined by the auger shape and the auger load Fa.

  When the above equation 8 is modified and Q ′ = Q is substituted, the following equation 9 is obtained.

となる。
（４−１）搬送量Ｑ´の式の導出は以下の通りである。

It becomes.
(4-1) The derivation of the expression for the transport amount Q ′ is as follows.

  The auger consumption output Ea is the sum of the following inertial output related to the rotation of the auger 2, the motion output related to the friction that moves the snow along the screw ribbon 2A of the auger 2, the position output that lifts the snow up to the blower 3 and other outputs. 10 can be expressed.

ここで、Ｑ´は搬送中の雪の単位時間当たり質量、Ｌはオーガ２の送り量に関する距離、Ｈはオーガ２からブロワ３までの高さ、μは雪とオーガ２の摩擦係数、ｇは重力加速度、αａはオーガ２のその他の消費出力とする。

Here, Q ′ is the mass per unit time of the snow being conveyed, L is the distance related to the feed amount of the auger 2, H is the height from the auger 2 to the blower 3, μ is the friction coefficient between snow and the auger 2, and g is Gravitational acceleration, αa is the other consumed output of the auger 2.

となる。Ｅａ＝ｋａ×Ｆａ×Ｎａで求められるから、オーガ消費出力Ｅａはオーガ回転数Ｎａに比例する。

It becomes. Since Ea = ka × Fa × Na, the auger consumption output Ea is proportional to the auger rotational speed Na.

  As a result of analyzing the basic test data, αa is a small value in the practical rotation range and the amount of change is small. Therefore, the other consumption output αa of the auger 2 is studied as a constant unrelated to the auger rotation number Na.

  As a result, when the transport amount Q ′ is summarized as a function of the auger rotation speed Na, the following expression 14 is obtained.

ここで、ｋｃ＝ｋａ×Ｆａ／（μＬ＋ｇＨ）、η＝αａ／（μＬ＋ｇＨ）とすれば、

Here, if kc = ka × Fa / (μL + gH) and η = αa / (μL + gH),

となる。

It becomes.

  kc is a value proportional to the auger load Fa. As described above, since kc = ka × Fa / (μL + gH), the value kc can be calculated from the measurement data of the auger load Fa.

  η is a term related to the output that is not directly related to snow transportation, and it is ignored as a small value.

の式が得られる。

The following equation is obtained.

According to Equation 16, a solution that is not a strict value but has no practical problem can be obtained.
Calculation method of target auger rotation speed (5) The following equations 17 and 18 are obtained from the above mathematical expressions.

  Equation 17 is obtained by substituting kq × Eb ′ of Equation 7 into the snow removal amount Q of Ni = Q / kc of Equation 9 above, and becomes Ni = kq × Eb ′ / kc, and actual consumption output Eb ′ from Equation 6 above. Since Eb−Eb 0, Ni = kq × (Eb−Eb 0) / kc. Since the blower consumption output Eb is kb × Fb × Nb from the above equation 1, the following equation is obtained.

Or

となり、数１７において、上述したように値ｋｃはオーガ負荷Ｆａの測定データから算出することができるから、数１７を用いてオーガ負荷Ｆａ、ブロワ負荷Ｆｂ、ブロワ回転数Ｎｂの情報から目標オーガ回転数Ｎｉが求められる。

In Equation 17, since the value kc can be calculated from the measurement data of the auger load Fa as described above, the target auger rotation is obtained from the information on the auger load Fa, the blower load Fb, and the blower rotational speed Nb using Equation 17. The number Ni is determined.

Convergence of target auger rotational speed by repetition (6) When the auger rotational speed is changed, the auger load Pa, blower rotational speed Na, and blower load Fb each change and increase or decrease within the range of the motive power E of the prime mover 8. The target auger rotational speed Ni changes.

  Therefore, each time, from the calculation of the blower consumption output to the target auger rotational speed Ni is recalculated by the procedures (1) to (5). Then, after a certain time, it approaches the optimum auger rotational speed Na in the system.

Calculation method of auger rotation speed (simplified formula)
(7) In order to calculate the snow removal amount of the blower 3, information on the blower load Fb and the blower rotational speed Nb is measured by the rotation sensor 8A. A method for calculating the auger rotation speed will be described.

  The blower snow removal amount is set to a predetermined value, and the auger transport amount is calculated according to the procedures (4) and (6) for the constant blower snow removal amount, and the target auger rotational speed Ni is calculated. In addition, the snow removal amount Q of the blower 3 can set the target snow removal amount Q from the performance of the blower 3. The input information required at this time is only the auger rotation number Na and the auger load Fa. By preparing multiple (2, 3) values for the constant amount of snow removal from the blower so that they can be switched according to the number of gears of the blower 3, the auger consumption output Ea can be reduced by simple measurement. Can do. The number of gears of the blower 3 can be set to high speed, medium speed, low speed, etc. within a range suitable for the performance of the blower 3.

となる。
オーガ回転数の制御方法
以上を基本計算し、さらに次の条件を組み込みオーガ回転数Ｎａの制御信号を出力する。

It becomes.
The basic calculation of the above auger rotation speed control method is performed, and the following conditions are incorporated to output a control signal for the auger rotation speed Na.

Rotation speed lower limit control method by auger load Pa (8) Since it is known that the auger load Pa increases as the rotation speed of the auger 2 decreases, an upper limit value of the auger load Pa is determined in order not to damage the control device. Keep it.

When the auger load Pa exceeds the upper limit value, the target auger rotational speed Ni is corrected to be increased.
Rotational speed control method by auger rotational speed (9) It has been found that if the auger rotational speed Na becomes smaller than a certain value, snow clogging occurs and it cannot be conveyed to the blower 3. Set to the lower limit.

  When the auger rotational speed Na approaches the lower limit value of the auger rotational speed (auger rotational speed lower limit value), the target auger rotational speed Ni is corrected to be increased.

Selection of rotational speed lower limit control (10) Although the input information to be monitored is different in terms of (8) and (9) above, either one may be used because the purpose of preventing the target auger rotational speed Ni from being excessively lowered is the same.
Rotation speed upper limit control method (11) A rotation speed upper limit value is provided for the purpose of protecting the components of the auger drive unit. When the auger rotation speed Na is close to the upper limit value (auger rotation speed upper limit value), the target auger rotation speed Ni Correct to reduce.

Dealing with the discontinuous situation during snow removal work (12) In actual snow removal work, discontinuous changes occur, such as increase / decrease in the amount of snow accumulated in the puddle, change in the nature of snow due to the sun, and sudden change in the blower load Fb . For this reason, the target auger rotational speed Ni calculated discontinuously may not settle to a constant value.

  As a coping method, an upper limit value and a lower limit value of the auger rotation speed change are determined, and the calculated target auger rotation speed Ni is compared with the auger rotation speed Na which is input information, and the change amount has an upper limit (or lower limit value). If it has exceeded, the output value of the target auger rotational speed Ni is corrected within a range not exceeding the upper limit (or lower limit).

  In accordance with the above flow, the target auger rotational speed Ni is calculated from the method of estimating the “snow removal” and the “conveyance amount” in response to the load change due to the amount of snow and the nature of the snow, and the auger rotational speed Na is controlled. As a result, waste of the auger consumption output can be minimized and the snow removal capability of the snow removal device can be efficiently extracted.

  Further, since the rotation control of the auger 2 can be automated, the operator can control the blower rotation as usual, and can suppress the auger consumption output without imposing the operation burden on the operator, thereby improving the snow removal efficiency.

  Furthermore, in the past, only the amount of snow removal and the efficiency of snow removal have been sensuously determined based on the experience of the operator, but if a method for estimating the amount of snow removal Q is used, the estimated amount of snow removal can be visually notified to the operator. Can be used to improve work efficiency.

  FIG. 10 shows a display 31 mounted on the rotary snowplow 1, which includes a plurality of display units 32, 32... For displaying the state of the rotary snowplow 1 obtained from the above-described mathematical expressions. The units 32, 32... Display the engine (motor) speed, the snow removal amount Q, the blower consumption output Eb, the snow removal fuel consumption rate, and the like.

  As a control mechanism of these devices, an operator for processing the information on the rotational speeds Na and Nb and the loads Fa and Fb of the auger 2 and the blower 3 in the flow as shown in FIG. prepare. The obtained optimum auger rotational speed Na is converted into an oil flow rate control signal of the auger drive device and output, and the variable displacement hydraulic pump 2C is controlled by this signal, thereby controlling the auger rotational speed Na. Specifically, in step 1 (S1), the auger rotational speed Na, the blower rotational speed Nb, the Pa auger load, and the blower load Fb are calculated by inputting detection data of each sensor, and step 2 (S2) is calculated from these calculated data. Then, the blower consumption output Eb is calculated, the snow removal amount Q is calculated in step 3 (S3) from the calculation data obtained in steps 1 and 2, and from the calculation data obtained in the previous steps 1 to 3, In step 4 (S4), the target auger rotational speed Ni is calculated. In step 5 (S5), the target auger rotational speed Ni is compared with the auger rotational speed Na obtained by the measurement, and the auger rotational speed Na is calculated. It is set to a number Ni, and it is determined whether the target auger rotational speed Ni is not less than the lower limit value of the snow clogging limit or not more than the upper limit value of the machine allowable limit. This determination is made by the methods (8) to (12) above. Data of the target auger rotational speed Ni that satisfies the condition of step 5 (S5) is sent to step 6 (S6), and in step 6 (S6), the target auger rotational speed Ni is output. By controlling the flow rate of the auger 2, the rotation speed of the hydraulic motor 2B is controlled to set the rotation of the auger 2 to the target auger rotation speed Ni. These steps 1 (S1) to 6 (S6) are repeated at predetermined time intervals, and the auger 2 is adjusted so that the optimum target auger rotational speed Ni is obtained even if the blower load Fb and the blower rotational speed Nb change during the snow removal work. Control the rotation of For the control, a personal computer equipped with a storage device can be used.

  In FIG. 4, step 2 and step 3 are omitted, and a snow removal amount Q is set between step 2 and step 3 as step 7 (S7). In this case, the operator inputs a snow removal amount Q suitable for the rotary snowplow 1 from the performance of the blower 3.

  As described above, according to the drive control method of the rotary snow removal device of the present invention, the auger consumption output Ea can be reduced by controlling the auger rotational speed Na, and the operator is conscious of the control of the auger 2. Thus, an efficient snow removal operation can be performed only by the blower rotation control operation as before. That is, it is possible to perform efficient snow removal by adjusting the output of the auger 2 according to the snow removal amount Q by the blower 3.

  The results of basic research according to the present invention are shown in FIGS. The test condition is that the blower rotation speed Nb is constant, the snow removal work is performed while the auger rotation speed Na is changed, and the snow removal amount Q is calculated. The horizontal axis indicates the auger rotation number Na, and the vertical axis bar graph indicates the auger consumption output Ea and the blower consumption output Eb calculated from information of various sensors. The broken line represents the snow removal amount Q per unit time. It can be said from this figure that the auger consumption output Ea becomes smaller as the auger rotational speed Na becomes smaller. The snow removal amount Q increases as the blower consumption output Eb increases. The sum of the auger consumption output Ea and the blower consumption output Eb is equal to or less than the output of the prime mover 8 mounted on the rotary snowplow 1, and the blower consumption output Eb increases by the amount that the auger consumption output Ea decreases. Assuming that the blower consumption output Eb is constant and the snow removal amount Q is constant, energy can be saved by the amount of reduction of the auger consumption output Ea. As shown in FIG. 9, the auger consumption output Ea was reduced by about 45%.

  Since the rotary snowplow 1 uses a prime mover 8 such as a diesel engine, the surplus output corresponding to the decrease in the auger consumption output Ea can be used for other work. As a result of basic research, the blower consumption output Eb increases most remarkably. As described above, since the snow removal amount Q is proportional to the blower consumption output Eb as described above, the snow removal amount Q increases as Eb increases. In FIG. 9, the snow removal amount Q is increased by 22%.

Thus, in the present embodiment, the snow removal amount calculation method in the rotary snowplow 1 having the O over gas 2 and blower 3 was measured rotational speed Nb and the load Fb of the blower 3, a snow removal amount Q from these measurements Therefore, by calculating the snow removal amount Q by the blower 3, efficient snow removal can be performed.

Further, in this embodiment Thus, in the conveyance amount calculation method in the rotary snowplow 1 having the O over gas 2 and blower 3 was measured rotational speed Na and the load Fa of the auger 2, the conveyance amount from these measurements Therefore, efficient snow removal can be performed by calculating the amount of snow transported by the auger 2.

Further, in this embodiment Thus, in the control method of a rotary snowplow 1 having the O over gas 2 and blower 3 was measured rotational speed Na and the load Fa of the auger 2, previously snow amount from the performance of the blower 3 Q is set, the transport amount is calculated from the measured value of the rotational speed Na of the auger 2 and the load Fa, the snow removal amount Q is compared with the transport amount, and the rotational speed Na of the auger 2 is calculated from the transport amount necessary for the snow removal amount Q. Therefore, the snow removal efficiency can be improved by calculating the rotation of the auger 2 corresponding to the performance of the blower 3.

Further, in the present embodiment in this manner, corresponding to claim 1, in the control method of a rotary snowplow 1 having a blower 3 for Hoteki snow and auger 2 raking snow, rotation speed of the blower 3 Nb The rotation speed Na of the auger 2, the load Fb of the blower 3, and the load Fa of the auger 2 are measured, and the snow removal amount Q by the blower 3 is calculated from the measured values of the rotation speed Nb and the load Fb of the blower 3 . The amount of snow transported to the blower 3 by the auger 2 is calculated from the measured values of the rotational speed Na and the load Fa, the snow removal amount Q is compared with the transport amount , and the auger 2 in which the transport amount becomes equal to the snow removal amount Q. The target auger rotational speed Ni is set and the rotation of the auger 2 is controlled so as to be the target auger rotational speed Ni. Therefore, by calculating the rotational speed Na of the auger 2 corresponding to the snow removal amount Q of the blower 3, Improve snow removal efficiency .

In this way, in this embodiment, corresponding to claim 2 , the auger consumption output Ea is reduced by controlling the rotation of the auger 2 so as to achieve the target auger rotation speed Ni , and this reduction is reduced by the blower. Since it uses for consumption output Eb, the output of the motor | power_engine 8 can be distributed efficiently and snow removal efficiency can be improved.

Further, in this embodiment Thus, in the control method of a rotary snowplow 1 having the O over gas 2 and blower 3 was measured rotational speed Na and the load Fa of the auger 2, previously snow amount from the performance of the blower 3 Q is set, the transport amount is calculated from the measured values of the rotation speed Na of the auger 2 and the load Fa, the snow removal amount Q is compared with the transport amount, and the auger 2 is adjusted so that the transport amount necessary for the snow removal amount Q is obtained. Since the rotation is controlled, the rotary snowplow 1 with high snow removal efficiency can be obtained.

In this way, in this embodiment, corresponding to claim 3 , in the rotary snowplow 1 provided with the auger 2 for scraping snow and the blower 3 for radiating snow, the rotational speed Nb of the blower 3, the auger 2 , The load Fb of the blower 3 and the load Fa of the auger 2 are measured, and the snow removal amount Q by the blower 3 is calculated from the measured values of the rotation speed Nb and the load Fb of the blower 3, and the rotation speed Na of the auger 2 is calculated. The amount of snow transported to the blower 3 by the auger 2 is calculated from the measured values of the load Fa, the snow removal amount Q is compared with the transport amount , and the target auger 2 of the auger 2 where the transport amount is equal to the snow removal amount Q is calculated. Since the rotation speed Ni is set and the rotation of the auger 2 is controlled so as to reach the target auger rotation speed Ni, the rotary snowplow 1 with high snow removal efficiency can be obtained.

  The present invention is not limited to this embodiment, and various modifications can be made within the scope of the gist of the present invention. For example, the auger rotation sensor, the auger load sensor, the blower rotation sensor, and the blower load sensor are not limited to those shown in the embodiments, and various types can be used.

1 Rotary Snow Plow 2 Auger 3 Blower 6 Rotation Sensor (Auger Rotation Sensor)
7 Pressure gauge (auger load sensor)
8 Motor 8A Rotation sensor (Blower rotation sensor)
11A Torque meter (Blower load sensor)
Fb Blower load Nb Blower speed Eb Blower consumption output Fa Auger load Na Auger speed
Ni Target auger speed Ea Auger consumption output

Claims (3)

In a control method of a rotary snow plow equipped with an auger that scrapes snow and a blower that dissipates snow, the rotational speed of the blower, the rotational speed of the auger, the load of the blower, the load of the auger are measured, and the blower The amount of snow removal by the blower is calculated from the measured value of the rotation speed and the load, and the amount of snow transported to the blower by the auger is calculated from the measured value of the rotation speed and the load of the auger. A rotary auger that compares a carry amount, sets a target auger rotational speed of the auger that makes the carry amount equal to the snow removal amount, and controls the rotation of the auger so as to be the target auger rotational speed. How to control a snowplow. By controlling the rotation of the auger such that the target auger rotational speed, to reduce the auger consumption output, rotary snow plow according to claim 1, characterized by using the reduced amount to said blower consumption Output Control method. In a rotary snowplow equipped with an auger that scrapes snow and a blower that dissipates snow, the rotational speed of the blower, the rotational speed of the auger, the load of the blower, the load of the auger are measured, and the rotational speed of the blower The amount of snow removal by the blower is calculated from the measured value of the load and the load, and the amount of snow transported to the blower by the auger is calculated from the rotation number of the auger and the measured value of the load. A rotary snowplow characterized by setting a target auger rotational speed of the auger at which the transport amount is equal to the snow removal amount, and controlling the rotation of the auger so as to be the target auger rotational speed .

Images